Ultrasonic cleaning machine maintenance
2023-04-06 07:08:39
1. It is forbidden to splash conductive liquid (such as water) from the inlet of the top of the ultrasonic control cabinet. Otherwise it will cause serious damage to the cleaning machine's wiring system.
2. Be careful to keep the machine clean and turn off the power when not in use.
3. Avoid collision or violent vibration of the machine.
4. Keep away from heat sources.
5. The machine should be stored in a damp environment.
6. The continuous working time of the machine shall not exceed 4 hours. If the continuous working time is too long, the ultrasonic adjustment knob shall be rotated to 0, and the cooling fan shall continue to work. In the state that the ultrasonic cleaning does not start, the continuous heat dissipation in the ultrasonic control cabinet is at least 2 minutes.
7. After long-term operation of the cleaning machine, the power knob should first be turned to zero before shutting down, and the fans can be turned off after 3-6 minutes to ensure that the internal heat of the power supply is dissipated.
8. The cleaning solution should be settled, filtered or replaced in time to ensure the cleaning effect.
To make the ultrasonic cleaning machine work normally for a long time, besides avoiding non-standard operation, it is necessary to regularly perform maintenance and maintenance on the cleaning machine and do the following work:
1 Clean the contaminated cleaning fluid on the tank regularly.
2 Periodically run the oil pump once, at least 10mmin or more at a time.
3 After the ultrasonic cleaning machine is used up, cover it with a hood to protect it from dust and moisture.
Routine Maintenance - After Each Operation 1. Rinse the hoses and filters attached to the cleaner to remove any detergent residue to help prevent corrosion.
2. Turn off the water supply connected to the pressure washer.
3. Trigger the trigger on the servo gun lever to release all pressure in the hose.
4. Remove the rubber hose and high pressure hose from the pressure washer.
5. Cut off the spark plug connection wire to ensure that the engine will not start (applicable to engine type).
Electric type:
Turn the power switch on and off four to five times, 1-3 seconds each time, to clear the pump. This step will help protect the pump from damage.
Engine type:
Slowly pull the engine's starter rope five times to clear the pump. This step will help protect the pump from damage.
Regular maintenance - Maintenance once every 2 months 1. Periodically removing fuel deposits from the tank will prolong the service life and performance of the engine. Fuel deposits can cause damage to fuel lines, fuel filters, and carburetors.
2. Protect your pressure washer with a protective sleeve (9.558-998.0) from a Kärcher pump when not using a high-pressure cleaner. The protective jacket of the pump is specially used to protect the high-pressure cleaner against corrosion, premature wear and freezing. Also apply lubricant to the valve and seals to prevent them from getting stuck.
Electric type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump shield and open the valve.
4. Start to turn on the washer; suck all the contents of the can into the pump.
5. Turn off the washer; the pressure washer can now be stored directly.
Engine type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump shield and open the valve.
4. Ignite, pull the starter rope; suck all the contents of the tank into the pump.
5. The pressure washer can now be stored directly.
Hot and cold water pressure washer maintenance instructions 1. Weekly maintenance Check the oil level If the engine oil is emulsified (ie the oil tank water), immediately contact the after-sales service.
Clean the water filter.
February maintenance cleaning detergent filter.
Carry out maintenance operations, cleaning, and adjustments.
Three. 500 hours of maintenance and replacement of engine oil.
Unscrew the oil discharge bolts and discharge the waste oil into a designated container to avoid environmental pollution. After the oil is drained, reinstall the bolts and add new oil to the middle of the required marking line.
Clean the heating fume If the heating tube is blackened in the fumes in a short time, you should ask the after-sales service personnel to check the burner. If the burner is damaged, it will increase fuel consumption and pollute the environment.
V. Heat Pipe Removal Scale If both the equipment is repeatedly turned on and off at the maximum operating pressure or if the high pressure pipe is not connected at the maximum flow (the pressure on the pressure gauge is above 10 bar), both of these conditions will result in scale.
We recommend that you contact the after-sales service personnel to clean the scale and check the dosage of the descaling solution.
VI. Clean the fuel tank Remove the fuel tank and carefully flush the fuel tank. If it is washed with water, make it dry after washing.
Reinstall the fuel tank on the device.
VII. High Pressure Pipes Carefully inspecting all high pressure pipes of high pressure pipes must be safe. Above the working pressure range values ​​and manufacturer's mark must be printed.
High-pressure pipes that cannot be twisted, twisted, pressed or damaged by any damage are very dangerous and must be replaced immediately.
Using a low-pressure pipe as a high-pressure pipe or repairing it is dangerous. You can only use a marked and tested high-pressure pipe (the original high-pressure pipe of the equipment meets all safety requirements)
8. Wires and wires cannot be damaged. If there is damage, they must be replaced immediately.
9. Use after a long period of time If the device is placed for a long time, calcium may be generated, it will make the device start difficult or damaged, in order to avoid the power to the motor and overheat damage, we recommend that before starting the device, first 3 points start.
Maintenance and Maintenance Precautions Because the internal active devices mainly use electric vacuum devices, the internal voltage is high. Therefore, care must be taken when performing maintenance. When measuring the voltage, it is necessary to accurately adjust the voltage range of the multimeter. For the higher voltage part of the measurement should pay attention to safety. The main part of the high voltage power supply is static (non-energized) measurements. The following is the MF--47 type multimeter if there is no special emphasis.
The machine is composed of two parts: the source of ultrasonic generation and the transducer. To ensure the integrity of the transducer when the machine is inspected, the inspection method is to use a megohmmeter (rocking table) voltage of 1000V, and the transducer is measured. The insulation resistance value of the negative electrode (that is, the resistance between the connector plugs 3 and 4) is required to be more than 20 MΩ or more. If the resistance is found to be very small or even close to zero ohm, it is certain that the transducer is damaged and can only be repaired by the manufacturer. Or replace the new transducer.
The source is also called the ultrasonic power supply. Its function is to convert the power frequency power supply to an ultrasonic transducer higher than the audio frequency or at the high end of the audio frequency. The transducer used for the XDS-5C type generally works 18KHZ+0.5KHZ range. The working principle of the generating source is to boost the transducer by multiplying the signal generated by the G1 oscillation by several stages. However, due to the special nature of the work of the electron tube, there are some differences between some places and the common transistor circuit. The voltage values ​​mentioned below are measured when the machine is turned on but not under high pressure.
The signal oscillating part is composed of G1 6N3 as the core. 6N3 contains two basically identical triodes. One constitutes an RC oscillation circuit. The external timing element that determines the oscillation frequency is R1 R2 R3 R4 C1 C2 C4 C5. C1 C2 is the frequency on the panel. Adjusting the double capacitance, adjusting W1 not only can adjust the oscillation intensity of G1, but also the oscillation frequency follows changes. In the adjustment process, it is best to take into account the high oscillation voltage amplitude and the oscillation frequency, when adjusting the frequency of C1 C2 (frequency adjustment) Can change between 16KHZ and 20KHZ. The ZD5 on the diagram is a 110V/8W bulb that is used as a temperature-compensated resistor. The checkpoint of the oscillating stage signal is at the upper end of W2. Many problems can be seen by detecting the voltage (especially the frequency value) of this point to the ground (the casing can be regarded as a direct current point), narrowing the scope of fault inspection. Therefore, the signal input of the frequency meter is connected to this point. If the frequency meter's reading is zero or a very small number can be seen as the previous stage does not start, at this time carefully adjust the W1 to see if there is any improvement, if still, focus on checking whether the C1 touch film, G1 power supply is normal. If the frequency deviates more than 18KHZ, check whether there is any change in the number of external resistors.
The G1 oscillating signal is adjusted by the power potentiometer W2 and sent to the gate of the G26N8P. G2 is also a package with two identical triodes. A tube amplified signal is coupled via C9 and R13, R14 is divided into another tube. The gate of G3 is sent to the other half of the G2 tube for phase inversion and sent to the gate of G3 via C10. L1 is the load inductance of G3. The amplitude of the output of the two tubes inside G3 is basically the same. The signal of opposite phase is sent to the two grids of G4 through L1. By measuring the voltage on L1, the operating conditions of G2 and G3 can be determined. When adjusting W2, the voltage on L1 should change from 0V to 20V (AC voltage). The G2 and G3 faults are relatively few. It is important to check the capacitance on the signal path. If half of the tubes do not work properly, check the bias resistance.
G4 external components except L1 is B4, it is a coupling transformer, the primary voltage is high, about 600V, the secondary signal voltage is about 0 - 45V (AC voltage) with the amplitude of W2 adjustment changes.
G1—The anode voltage of G4 is rectified by BG1-4 through ZG1 and C16 through the relevant winding of B2. G9 and G10 are regulated, and then they are divided by corresponding resistors.
The anode voltage of G5 and G6 is added to the primary center tap of B6 by the rectification and filtering of B5 winding. The voltage here is 1200V (DC). This voltage is turned on at the same time as the high voltage is turned on. If you only need to check the working state of G5 and G6, the voltage should be high. The remaining fuses in the circuit are disconnected for complete safety. If you must measure together with the next level, pay attention to safety.
G5, G6 should pay attention to the two short-circuit resistances R23 and R24 which are connected to the anode, and the AC voltage at both ends of the B6 secondary pole will not be equal. Generally determine the working status of G5 and G6 to disconnect BX7-9 to measure the secondary voltage of B6. At this time, turn on the low voltage, wait for the time relay to arrive, turn on the high voltage switch, adjust the power potentiometer, and the B6 secondary center tap should be For -56V (DC voltage) voltage, the other two terminal voltages are 120V (AC voltage) (power adjusted to maximum), if the machine works normally (BX7-9 is not disconnected) the voltage can be up to 300V (AC voltage ) (black table pen test signal, red table pen ground). G7, G8 constitute the output stage, this part of the voltage up to 2200-3000V (DC voltage) The general method has been unable to directly measure the voltage, this part of the fault component to find the main static measurement, commonly used tools to megohmmeter is relatively easy to use If it is possible to find a 2500V-level shake meter as the best, this part of the fault is relatively more, as discussed in detail below.
[Note] This section refers to high pressure, unskilled professionals do not rush to repair, so as not to cause personal and property damage!
380V three-phase power is passed through a three-phase step-up transformer and is boosted by about ten times and then supplied by BX7-9 with six 2CL56G 10KV/1A silicon stacks. Three-phase full-wave rectification is applied to the center terminal of output transformer B7 through ZL4 and C22 filtering. The two short-circuit resistance R31, R32 added to the G7, G8 anode, due to higher voltage, this part of the higher failure rate, in general maintenance should pay attention to moisture, dust, and often clean up. In places where the environment is relatively humid, it is better to use insulating paint to treat the high-voltage rectifier silicon stack against fire. This part of the components that are easily damaged have G7 and G8, which generally appear as anode to gate breakdown, causing high voltage short circuit. This can be measured using a megger, which should have an insulation resistance greater than 30 MΩ, but not infinity. The high-voltage rectifier silicon stack is also a component that is easily damaged. If the high-voltage rectifier is turned off immediately and the BX7-9 is blown, the silicon stack must be checked with a rocker. Its forward and reverse resistance should have greater differences. When troubleshooting the breakdown of the anode and the gate of the tube, it is necessary to pay attention to whether the resistance on the tube grid is blown or not, and whether the C14 and C15 filter noise capacitances are broken down. Otherwise, the power output after the tube replacement is still abnormal.
The remaining contactor control part of the principle is relatively simple, the main features are as follows: J1 provides 220V (AC voltage) to the regulator's input, after the regulator voltage regulator to supply the filament transformer, and other need 220V (AC voltage) power supply local. JS and J2, R37, and R38 ensure that G7 and G8 can be warmed up with half the filament voltage for several minutes. K2 and J4 ensure that the power potentiometer does not turn on the high voltage when it is not in the zero position to prevent the power surge current. J6 turns off the high voltage when the 2200V (DC voltage) high voltage current exceeds 1A.
Typical fault analysis:
1 Open low-voltage frequency meter display 0.01KHZ, no power output after high pressure.
Since the frequency meter display is not normal, it can be determined that G1 does not start vibration, and the adjustment W1 is invalid, and then the frequency adjustment capacitors C1 and C2 are found to have a touch phenomenon. Troubleshoot with tools after troubleshooting.
2 Frequency meter display is normal after power on, but no high power output.
In this case, first check whether the voltage on L1 is normal to determine which level the fault is at. If it is normal, then the first-level should be checked backwards. However, it should be noted that the signal is divided into two after L1. Generally speaking, the signal is not correct. Normal does not affect the work of another road. If the signal disappears at a certain level, check the power supply and the coupling transformer. This example fault is a B4 primary open circuit.
3 boot output current is low, only 1.2A - 1.5A, transducer sound.
The low-power faults involve more parts, and there may be only one way to push the signal. This may be reflected in the voltage at both ends of the B6 secondary (ac voltage to ground, the measurement method is discussed in the corresponding discussion) asymmetry, which can be followed by The level finding signal voltage is found to be faulty, and it is also possible that one of the final power amplifier tubes does not work, which can be determined by the temperature of the outlet after the machine has been working for a period of time. There is also a very rare possibility that the anode voltages of the G7 and G8 are too low. We must focus on whether the BX7-9 has an open circuit. In this example, if the BX8 is opened, the voltage after rectification will be low, but the fuse will not be blown by itself and the cause of the fuse should be found so as not to cause a greater fault. The cause of the fault in this example is that the rectifier silicon stack is wet and sparked, and the BX8 fuse causes the G7 and G8 supply voltages to be low and the output voltage to be low.
4 The fault phenomenon is the same as in the 3 cases, but the transducer is silent.
This failure is more special, after inspection found that in addition to the B6 secondary voltage is low, the front of the amplification at all levels are normal, after asking the user the reason for the failure is the failure of the replacement of the electronic tube after the failure, after a careful search to find the problem: BX7— 9 All blown, remove the other faults and add the fuse. The machine returns to normal. In general, if there is no anode voltage, the plate current should not be large.
5 When the fault is high pressure, the high-voltage contactor is immediately disconnected, and sometimes the BX7-9 will blow.
This kind of fault phenomenon indicates that there is a serious short circuit fault in the high voltage circuit. You can check the insulation resistance of each component of the corresponding high voltage part of G7 and G8 to ground by means of a rocker. If there is a low resistance value, disconnect the capacitor first and perform troubleshooting one by one. The focus is on silicon reactors and electron tubes. A special case is that if the silicon stack is damaged more than two times, it is necessary to pay attention to whether there is a possibility that the voltage across the primary turns of the three-phase transformer may cause the secondary voltage to rise, and do not tamper with the high voltage again. If you want to power on the test, at least disconnect the tube and use caution when powering up. It is best to be able to determine the fault without power to ensure complete safety.
6 The output current is large after turning on, but the transducer is silent.
Check the transducer and matching inductance. The transducer may be damaged and cause a short circuit in the load. It is found that the transducer must be replaced in time after being short-circuited to avoid serious consequences.
7 The output current is normal and the frequency is normal, but the cleaning effect is not good, and the product is not cleaned regularly.
The main reason for the failure of the common transducer replacement machine is because the installation position of the new transducer is incorrect, the upper transducer should be adjusted to leave the upper end of the product about 2-3CM, and the lower transducer can be placed under the mesh belt. . And the upper and lower transducers are relatively staggered so that the ultrasonic vibrations cancel each other out.
8 Burning high voltage silicon reactors after starting up is more complicated: I think there are the following possibilities;
(1) The high-voltage circuit has serious short-circuit phenomena. This type of fault is generally accompanied by high-voltage burn-out. This type of fault can be determined by a megohmmeter with a high voltage up to 2500V DC. Each component can be tested on a high-voltage ground (machine). The resistance of the shell can be used to find the damaged component. This failure may be caused by the possibility of the electron tube.
(b) There is a short circuit between the primary and the secondary of a three-phase boosting transformer; the secondary voltage rises more; this may require a single-phase voltage regulator and a self-made voltmeter that can measure high voltage; disconnect the primary and secondary transformers. Stage connected to the self-made voltmeter, good insulation, (Figure 3), carefully adjust the regulator voltage from low to 220V AC voltage near the three-phase results are the same.
(c) Damage to the output transformer.
FU-5F High-Power Tube Failure The last-stage power transistor FU-5F operates at high voltage, and its application conditions are relatively poor under industrial conditions. Due to various reasons, the early effectiveness of the tube is relatively common. According to our experience, only strict compliance with some Note that such failures can be completely avoided.
Matters needing attention: 1 to ensure that the FU-5F air cooling required by the normal amount of air, pay attention to regular checks fan ducts are clean, regular cleaning dust on the fan and FU-5F radiator dust. Pay special attention to the power switch must pay attention to the fan after the switch!
2 Regularly check the output voltage of the AC regulator to ensure that the deviation of the FU-5F filament voltage is not more than 10%, especially if it is not too high, so as not to shorten the service life of the electronic tube. It is best to replace the new tube together with the cap, or Remove the oxide layer above.
3 Before the machine stops working after high pressure, continue to ensure that the fan will continue to work for 5-15 minutes to avoid sudden cooling of the pipe. Also try to avoid the sudden and hot situations. Do not drop cold water onto the hot glass tube shell so as not to cause the tube shell to burst.
4 Ensure that the output current of the final power tube (ie, the plate current) does not exceed 2A.
FU-5F damage and determination method of the electronic vacuum tube Because of its special structure, the judgment of damage is more complicated. The following reference some book and personal experience to put forward to discuss with everyone, the reference book is mainly "a large launch tube practical maintenance The manuals (China Radio and TV Press, November 1994 edition) mentioned in the book and our common faults in the work have the following kinds of faults: If the damage is caused by the quality of the pipe, you can contact the pipe manufacturer to change it. The only manufacturer in the country is the Beijing Dongfang Electronic Tube Factory. The manufacturer's requirement for the quality of the tube must be within three years after the date of manufacture of the tube. And require the specification and certificate of conformity and complete the corresponding content in the specification. The complete original sponge packing material was shipped back to the factory for complete replacement.
1Gas leakage is the main cause of high voltage short circuit. The tube shows evaporating material in the tube wall, especially the top of the tube at the top of the gas pumping seal. After the filament voltage is applied, the tube is not bright or very dark. Check the anode with a megohmmeter. The resistance of the cathode's insulation resistance is very low, only 5-6MΩ, you can see the tube flashing red, pink or purple. At this time, check with a multimeter to see if the resistance is found. If there is a resistance, it is a touch, and no resistance is a leak. Generally, the insulation resistance should be higher but not infinite. If the resistance is infinite, there is no flash in the tube, and the tube is inspected. The sound of fire is definitely a complete leak. Part of the reason for the leak is the drawbacks of the manufacturer's manufacturing process. Not much to say here, the user-related reasons are that the pipe is subject to external forces, especially when the pipe is installed and transported, the pipe is impacted by external force to burst the glass bulb, and the user should use the original package when transporting. The material is loaded and transported carefully. Care should be taken when installing, especially when installing the filament on the top of the tube and the three copper caps on the screen, you must hold the cap by hand to avoid breaking the pins or cracking the seal; if it is stored for a long time, Causes the pipe to leak slowly, all kinds of outside conditions will cause the metal material of the corroded pipe to cause the air leakage, so after using the pipe to buy as soon as possible, the likelihood that the air leakage of the pipe inventory will be greatly improved after a long time. The poor cooling during operation of the tube will cause a large amount of gas to be discharged in the tube, and the appearance of the tube will be like leakage. Therefore, it is necessary to ensure cooling during operation, and each electrode cannot be overheated.
2 Anode to grid breakdown, usually leaks inside the tube or there are too many harmful internal gases.
3 cracking or perforation of the pipe wall, the general causes are: insufficient cooling, causing partial overheating of the pipe wall; poor contact between the pipe cap and the electrode lead-out ring, resulting in local overheating; the machine has a strong detuned or parasitic oscillation phenomenon, which requires the machine to work Follow the resonant frequency of the transducer, pay attention to the reading of the frequency meter. If you find that an individual tube is overheated during operation, check whether its push signal is superimposed with a parasitic oscillation signal. And by changing the size of the filter clutter capacitor to eliminate, after the damage of the tube carefully look at the red paint at the junction of the glass bulb and the copper radiator. This is a heat-resistant paint. If the blackening is serious, it shows that there are problems.
4 The output current drops. For old pipes, if the usage time is more than ten months, this is a normal aging phenomenon. If it cannot meet the requirements, consider replacing the pipe. For some new tubes that have been used for less than a month, they can be compensated by increasing the output voltage of the oscillating stage.
2. Be careful to keep the machine clean and turn off the power when not in use.
3. Avoid collision or violent vibration of the machine.
4. Keep away from heat sources.
5. The machine should be stored in a damp environment.
6. The continuous working time of the machine shall not exceed 4 hours. If the continuous working time is too long, the ultrasonic adjustment knob shall be rotated to 0, and the cooling fan shall continue to work. In the state that the ultrasonic cleaning does not start, the continuous heat dissipation in the ultrasonic control cabinet is at least 2 minutes.
7. After long-term operation of the cleaning machine, the power knob should first be turned to zero before shutting down, and the fans can be turned off after 3-6 minutes to ensure that the internal heat of the power supply is dissipated.
8. The cleaning solution should be settled, filtered or replaced in time to ensure the cleaning effect.
To make the ultrasonic cleaning machine work normally for a long time, besides avoiding non-standard operation, it is necessary to regularly perform maintenance and maintenance on the cleaning machine and do the following work:
1 Clean the contaminated cleaning fluid on the tank regularly.
2 Periodically run the oil pump once, at least 10mmin or more at a time.
3 After the ultrasonic cleaning machine is used up, cover it with a hood to protect it from dust and moisture.
Routine Maintenance - After Each Operation 1. Rinse the hoses and filters attached to the cleaner to remove any detergent residue to help prevent corrosion.
2. Turn off the water supply connected to the pressure washer.
3. Trigger the trigger on the servo gun lever to release all pressure in the hose.
4. Remove the rubber hose and high pressure hose from the pressure washer.
5. Cut off the spark plug connection wire to ensure that the engine will not start (applicable to engine type).
Electric type:
Turn the power switch on and off four to five times, 1-3 seconds each time, to clear the pump. This step will help protect the pump from damage.
Engine type:
Slowly pull the engine's starter rope five times to clear the pump. This step will help protect the pump from damage.
Regular maintenance - Maintenance once every 2 months 1. Periodically removing fuel deposits from the tank will prolong the service life and performance of the engine. Fuel deposits can cause damage to fuel lines, fuel filters, and carburetors.
2. Protect your pressure washer with a protective sleeve (9.558-998.0) from a Kärcher pump when not using a high-pressure cleaner. The protective jacket of the pump is specially used to protect the high-pressure cleaner against corrosion, premature wear and freezing. Also apply lubricant to the valve and seals to prevent them from getting stuck.
Electric type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump shield and open the valve.
4. Start to turn on the washer; suck all the contents of the can into the pump.
5. Turn off the washer; the pressure washer can now be stored directly.
Engine type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump shield and open the valve.
4. Ignite, pull the starter rope; suck all the contents of the tank into the pump.
5. The pressure washer can now be stored directly.
Hot and cold water pressure washer maintenance instructions 1. Weekly maintenance Check the oil level If the engine oil is emulsified (ie the oil tank water), immediately contact the after-sales service.
Clean the water filter.
February maintenance cleaning detergent filter.
Carry out maintenance operations, cleaning, and adjustments.
Three. 500 hours of maintenance and replacement of engine oil.
Unscrew the oil discharge bolts and discharge the waste oil into a designated container to avoid environmental pollution. After the oil is drained, reinstall the bolts and add new oil to the middle of the required marking line.
Clean the heating fume If the heating tube is blackened in the fumes in a short time, you should ask the after-sales service personnel to check the burner. If the burner is damaged, it will increase fuel consumption and pollute the environment.
V. Heat Pipe Removal Scale If both the equipment is repeatedly turned on and off at the maximum operating pressure or if the high pressure pipe is not connected at the maximum flow (the pressure on the pressure gauge is above 10 bar), both of these conditions will result in scale.
We recommend that you contact the after-sales service personnel to clean the scale and check the dosage of the descaling solution.
VI. Clean the fuel tank Remove the fuel tank and carefully flush the fuel tank. If it is washed with water, make it dry after washing.
Reinstall the fuel tank on the device.
VII. High Pressure Pipes Carefully inspecting all high pressure pipes of high pressure pipes must be safe. Above the working pressure range values ​​and manufacturer's mark must be printed.
High-pressure pipes that cannot be twisted, twisted, pressed or damaged by any damage are very dangerous and must be replaced immediately.
Using a low-pressure pipe as a high-pressure pipe or repairing it is dangerous. You can only use a marked and tested high-pressure pipe (the original high-pressure pipe of the equipment meets all safety requirements)
8. Wires and wires cannot be damaged. If there is damage, they must be replaced immediately.
9. Use after a long period of time If the device is placed for a long time, calcium may be generated, it will make the device start difficult or damaged, in order to avoid the power to the motor and overheat damage, we recommend that before starting the device, first 3 points start.
Maintenance and Maintenance Precautions Because the internal active devices mainly use electric vacuum devices, the internal voltage is high. Therefore, care must be taken when performing maintenance. When measuring the voltage, it is necessary to accurately adjust the voltage range of the multimeter. For the higher voltage part of the measurement should pay attention to safety. The main part of the high voltage power supply is static (non-energized) measurements. The following is the MF--47 type multimeter if there is no special emphasis.
The machine is composed of two parts: the source of ultrasonic generation and the transducer. To ensure the integrity of the transducer when the machine is inspected, the inspection method is to use a megohmmeter (rocking table) voltage of 1000V, and the transducer is measured. The insulation resistance value of the negative electrode (that is, the resistance between the connector plugs 3 and 4) is required to be more than 20 MΩ or more. If the resistance is found to be very small or even close to zero ohm, it is certain that the transducer is damaged and can only be repaired by the manufacturer. Or replace the new transducer.
The source is also called the ultrasonic power supply. Its function is to convert the power frequency power supply to an ultrasonic transducer higher than the audio frequency or at the high end of the audio frequency. The transducer used for the XDS-5C type generally works 18KHZ+0.5KHZ range. The working principle of the generating source is to boost the transducer by multiplying the signal generated by the G1 oscillation by several stages. However, due to the special nature of the work of the electron tube, there are some differences between some places and the common transistor circuit. The voltage values ​​mentioned below are measured when the machine is turned on but not under high pressure.
The signal oscillating part is composed of G1 6N3 as the core. 6N3 contains two basically identical triodes. One constitutes an RC oscillation circuit. The external timing element that determines the oscillation frequency is R1 R2 R3 R4 C1 C2 C4 C5. C1 C2 is the frequency on the panel. Adjusting the double capacitance, adjusting W1 not only can adjust the oscillation intensity of G1, but also the oscillation frequency follows changes. In the adjustment process, it is best to take into account the high oscillation voltage amplitude and the oscillation frequency, when adjusting the frequency of C1 C2 (frequency adjustment) Can change between 16KHZ and 20KHZ. The ZD5 on the diagram is a 110V/8W bulb that is used as a temperature-compensated resistor. The checkpoint of the oscillating stage signal is at the upper end of W2. Many problems can be seen by detecting the voltage (especially the frequency value) of this point to the ground (the casing can be regarded as a direct current point), narrowing the scope of fault inspection. Therefore, the signal input of the frequency meter is connected to this point. If the frequency meter's reading is zero or a very small number can be seen as the previous stage does not start, at this time carefully adjust the W1 to see if there is any improvement, if still, focus on checking whether the C1 touch film, G1 power supply is normal. If the frequency deviates more than 18KHZ, check whether there is any change in the number of external resistors.
The G1 oscillating signal is adjusted by the power potentiometer W2 and sent to the gate of the G26N8P. G2 is also a package with two identical triodes. A tube amplified signal is coupled via C9 and R13, R14 is divided into another tube. The gate of G3 is sent to the other half of the G2 tube for phase inversion and sent to the gate of G3 via C10. L1 is the load inductance of G3. The amplitude of the output of the two tubes inside G3 is basically the same. The signal of opposite phase is sent to the two grids of G4 through L1. By measuring the voltage on L1, the operating conditions of G2 and G3 can be determined. When adjusting W2, the voltage on L1 should change from 0V to 20V (AC voltage). The G2 and G3 faults are relatively few. It is important to check the capacitance on the signal path. If half of the tubes do not work properly, check the bias resistance.
G4 external components except L1 is B4, it is a coupling transformer, the primary voltage is high, about 600V, the secondary signal voltage is about 0 - 45V (AC voltage) with the amplitude of W2 adjustment changes.
G1—The anode voltage of G4 is rectified by BG1-4 through ZG1 and C16 through the relevant winding of B2. G9 and G10 are regulated, and then they are divided by corresponding resistors.
The anode voltage of G5 and G6 is added to the primary center tap of B6 by the rectification and filtering of B5 winding. The voltage here is 1200V (DC). This voltage is turned on at the same time as the high voltage is turned on. If you only need to check the working state of G5 and G6, the voltage should be high. The remaining fuses in the circuit are disconnected for complete safety. If you must measure together with the next level, pay attention to safety.
G5, G6 should pay attention to the two short-circuit resistances R23 and R24 which are connected to the anode, and the AC voltage at both ends of the B6 secondary pole will not be equal. Generally determine the working status of G5 and G6 to disconnect BX7-9 to measure the secondary voltage of B6. At this time, turn on the low voltage, wait for the time relay to arrive, turn on the high voltage switch, adjust the power potentiometer, and the B6 secondary center tap should be For -56V (DC voltage) voltage, the other two terminal voltages are 120V (AC voltage) (power adjusted to maximum), if the machine works normally (BX7-9 is not disconnected) the voltage can be up to 300V (AC voltage ) (black table pen test signal, red table pen ground). G7, G8 constitute the output stage, this part of the voltage up to 2200-3000V (DC voltage) The general method has been unable to directly measure the voltage, this part of the fault component to find the main static measurement, commonly used tools to megohmmeter is relatively easy to use If it is possible to find a 2500V-level shake meter as the best, this part of the fault is relatively more, as discussed in detail below.
[Note] This section refers to high pressure, unskilled professionals do not rush to repair, so as not to cause personal and property damage!
380V three-phase power is passed through a three-phase step-up transformer and is boosted by about ten times and then supplied by BX7-9 with six 2CL56G 10KV/1A silicon stacks. Three-phase full-wave rectification is applied to the center terminal of output transformer B7 through ZL4 and C22 filtering. The two short-circuit resistance R31, R32 added to the G7, G8 anode, due to higher voltage, this part of the higher failure rate, in general maintenance should pay attention to moisture, dust, and often clean up. In places where the environment is relatively humid, it is better to use insulating paint to treat the high-voltage rectifier silicon stack against fire. This part of the components that are easily damaged have G7 and G8, which generally appear as anode to gate breakdown, causing high voltage short circuit. This can be measured using a megger, which should have an insulation resistance greater than 30 MΩ, but not infinity. The high-voltage rectifier silicon stack is also a component that is easily damaged. If the high-voltage rectifier is turned off immediately and the BX7-9 is blown, the silicon stack must be checked with a rocker. Its forward and reverse resistance should have greater differences. When troubleshooting the breakdown of the anode and the gate of the tube, it is necessary to pay attention to whether the resistance on the tube grid is blown or not, and whether the C14 and C15 filter noise capacitances are broken down. Otherwise, the power output after the tube replacement is still abnormal.
The remaining contactor control part of the principle is relatively simple, the main features are as follows: J1 provides 220V (AC voltage) to the regulator's input, after the regulator voltage regulator to supply the filament transformer, and other need 220V (AC voltage) power supply local. JS and J2, R37, and R38 ensure that G7 and G8 can be warmed up with half the filament voltage for several minutes. K2 and J4 ensure that the power potentiometer does not turn on the high voltage when it is not in the zero position to prevent the power surge current. J6 turns off the high voltage when the 2200V (DC voltage) high voltage current exceeds 1A.
Typical fault analysis:
1 Open low-voltage frequency meter display 0.01KHZ, no power output after high pressure.
Since the frequency meter display is not normal, it can be determined that G1 does not start vibration, and the adjustment W1 is invalid, and then the frequency adjustment capacitors C1 and C2 are found to have a touch phenomenon. Troubleshoot with tools after troubleshooting.
2 Frequency meter display is normal after power on, but no high power output.
In this case, first check whether the voltage on L1 is normal to determine which level the fault is at. If it is normal, then the first-level should be checked backwards. However, it should be noted that the signal is divided into two after L1. Generally speaking, the signal is not correct. Normal does not affect the work of another road. If the signal disappears at a certain level, check the power supply and the coupling transformer. This example fault is a B4 primary open circuit.
3 boot output current is low, only 1.2A - 1.5A, transducer sound.
The low-power faults involve more parts, and there may be only one way to push the signal. This may be reflected in the voltage at both ends of the B6 secondary (ac voltage to ground, the measurement method is discussed in the corresponding discussion) asymmetry, which can be followed by The level finding signal voltage is found to be faulty, and it is also possible that one of the final power amplifier tubes does not work, which can be determined by the temperature of the outlet after the machine has been working for a period of time. There is also a very rare possibility that the anode voltages of the G7 and G8 are too low. We must focus on whether the BX7-9 has an open circuit. In this example, if the BX8 is opened, the voltage after rectification will be low, but the fuse will not be blown by itself and the cause of the fuse should be found so as not to cause a greater fault. The cause of the fault in this example is that the rectifier silicon stack is wet and sparked, and the BX8 fuse causes the G7 and G8 supply voltages to be low and the output voltage to be low.
4 The fault phenomenon is the same as in the 3 cases, but the transducer is silent.
This failure is more special, after inspection found that in addition to the B6 secondary voltage is low, the front of the amplification at all levels are normal, after asking the user the reason for the failure is the failure of the replacement of the electronic tube after the failure, after a careful search to find the problem: BX7— 9 All blown, remove the other faults and add the fuse. The machine returns to normal. In general, if there is no anode voltage, the plate current should not be large.
5 When the fault is high pressure, the high-voltage contactor is immediately disconnected, and sometimes the BX7-9 will blow.
This kind of fault phenomenon indicates that there is a serious short circuit fault in the high voltage circuit. You can check the insulation resistance of each component of the corresponding high voltage part of G7 and G8 to ground by means of a rocker. If there is a low resistance value, disconnect the capacitor first and perform troubleshooting one by one. The focus is on silicon reactors and electron tubes. A special case is that if the silicon stack is damaged more than two times, it is necessary to pay attention to whether there is a possibility that the voltage across the primary turns of the three-phase transformer may cause the secondary voltage to rise, and do not tamper with the high voltage again. If you want to power on the test, at least disconnect the tube and use caution when powering up. It is best to be able to determine the fault without power to ensure complete safety.
6 The output current is large after turning on, but the transducer is silent.
Check the transducer and matching inductance. The transducer may be damaged and cause a short circuit in the load. It is found that the transducer must be replaced in time after being short-circuited to avoid serious consequences.
7 The output current is normal and the frequency is normal, but the cleaning effect is not good, and the product is not cleaned regularly.
The main reason for the failure of the common transducer replacement machine is because the installation position of the new transducer is incorrect, the upper transducer should be adjusted to leave the upper end of the product about 2-3CM, and the lower transducer can be placed under the mesh belt. . And the upper and lower transducers are relatively staggered so that the ultrasonic vibrations cancel each other out.
8 Burning high voltage silicon reactors after starting up is more complicated: I think there are the following possibilities;
(1) The high-voltage circuit has serious short-circuit phenomena. This type of fault is generally accompanied by high-voltage burn-out. This type of fault can be determined by a megohmmeter with a high voltage up to 2500V DC. Each component can be tested on a high-voltage ground (machine). The resistance of the shell can be used to find the damaged component. This failure may be caused by the possibility of the electron tube.
(b) There is a short circuit between the primary and the secondary of a three-phase boosting transformer; the secondary voltage rises more; this may require a single-phase voltage regulator and a self-made voltmeter that can measure high voltage; disconnect the primary and secondary transformers. Stage connected to the self-made voltmeter, good insulation, (Figure 3), carefully adjust the regulator voltage from low to 220V AC voltage near the three-phase results are the same.
(c) Damage to the output transformer.
FU-5F High-Power Tube Failure The last-stage power transistor FU-5F operates at high voltage, and its application conditions are relatively poor under industrial conditions. Due to various reasons, the early effectiveness of the tube is relatively common. According to our experience, only strict compliance with some Note that such failures can be completely avoided.
Matters needing attention: 1 to ensure that the FU-5F air cooling required by the normal amount of air, pay attention to regular checks fan ducts are clean, regular cleaning dust on the fan and FU-5F radiator dust. Pay special attention to the power switch must pay attention to the fan after the switch!
2 Regularly check the output voltage of the AC regulator to ensure that the deviation of the FU-5F filament voltage is not more than 10%, especially if it is not too high, so as not to shorten the service life of the electronic tube. It is best to replace the new tube together with the cap, or Remove the oxide layer above.
3 Before the machine stops working after high pressure, continue to ensure that the fan will continue to work for 5-15 minutes to avoid sudden cooling of the pipe. Also try to avoid the sudden and hot situations. Do not drop cold water onto the hot glass tube shell so as not to cause the tube shell to burst.
4 Ensure that the output current of the final power tube (ie, the plate current) does not exceed 2A.
FU-5F damage and determination method of the electronic vacuum tube Because of its special structure, the judgment of damage is more complicated. The following reference some book and personal experience to put forward to discuss with everyone, the reference book is mainly "a large launch tube practical maintenance The manuals (China Radio and TV Press, November 1994 edition) mentioned in the book and our common faults in the work have the following kinds of faults: If the damage is caused by the quality of the pipe, you can contact the pipe manufacturer to change it. The only manufacturer in the country is the Beijing Dongfang Electronic Tube Factory. The manufacturer's requirement for the quality of the tube must be within three years after the date of manufacture of the tube. And require the specification and certificate of conformity and complete the corresponding content in the specification. The complete original sponge packing material was shipped back to the factory for complete replacement.
1Gas leakage is the main cause of high voltage short circuit. The tube shows evaporating material in the tube wall, especially the top of the tube at the top of the gas pumping seal. After the filament voltage is applied, the tube is not bright or very dark. Check the anode with a megohmmeter. The resistance of the cathode's insulation resistance is very low, only 5-6MΩ, you can see the tube flashing red, pink or purple. At this time, check with a multimeter to see if the resistance is found. If there is a resistance, it is a touch, and no resistance is a leak. Generally, the insulation resistance should be higher but not infinite. If the resistance is infinite, there is no flash in the tube, and the tube is inspected. The sound of fire is definitely a complete leak. Part of the reason for the leak is the drawbacks of the manufacturer's manufacturing process. Not much to say here, the user-related reasons are that the pipe is subject to external forces, especially when the pipe is installed and transported, the pipe is impacted by external force to burst the glass bulb, and the user should use the original package when transporting. The material is loaded and transported carefully. Care should be taken when installing, especially when installing the filament on the top of the tube and the three copper caps on the screen, you must hold the cap by hand to avoid breaking the pins or cracking the seal; if it is stored for a long time, Causes the pipe to leak slowly, all kinds of outside conditions will cause the metal material of the corroded pipe to cause the air leakage, so after using the pipe to buy as soon as possible, the likelihood that the air leakage of the pipe inventory will be greatly improved after a long time. The poor cooling during operation of the tube will cause a large amount of gas to be discharged in the tube, and the appearance of the tube will be like leakage. Therefore, it is necessary to ensure cooling during operation, and each electrode cannot be overheated.
2 Anode to grid breakdown, usually leaks inside the tube or there are too many harmful internal gases.
3 cracking or perforation of the pipe wall, the general causes are: insufficient cooling, causing partial overheating of the pipe wall; poor contact between the pipe cap and the electrode lead-out ring, resulting in local overheating; the machine has a strong detuned or parasitic oscillation phenomenon, which requires the machine to work Follow the resonant frequency of the transducer, pay attention to the reading of the frequency meter. If you find that an individual tube is overheated during operation, check whether its push signal is superimposed with a parasitic oscillation signal. And by changing the size of the filter clutter capacitor to eliminate, after the damage of the tube carefully look at the red paint at the junction of the glass bulb and the copper radiator. This is a heat-resistant paint. If the blackening is serious, it shows that there are problems.
4 The output current drops. For old pipes, if the usage time is more than ten months, this is a normal aging phenomenon. If it cannot meet the requirements, consider replacing the pipe. For some new tubes that have been used for less than a month, they can be compensated by increasing the output voltage of the oscillating stage.
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