Slurry pump industry standards: (1) Scope: This standard applies to the transport of liquid containing suspended solids (such as mines, ash, slime, sand and gravel, etc.) pump. The temperature of the solid-liquid mixture to be delivered does not generally exceed 80 ° C (double pump on the pump liner does not exceed 60 ° C). (2) Terminology 1 High-lift slurry pump: pump with head point greater than 50 m at specified point 2 Low-head pump: pump at specified point less than or equal to 50 m 3 Minimum cross-sectional area of ​​flow passage: Parts of flow cross-section minimum 4 Vulnerable flow parts: Components that easily fail due to erosion of the slurry, such as impeller, casing and guard of double-shell pump, pump body and pump cover of single-shell pump; Rubber lining Metal frame: metal member placed in the rubber to act as holding rubber 6 First Critical Speed: First (lowest) lateral natural vibration frequency of the rotating part of the pump Pump Rotation Speed ​​(3) Pump type single stage, single suction, axial suction, according to the slurry pump housing structure and the direction of the pump shaft is divided into the following three structures: 1 horizontal double shell pump with inner and outer casing - suitable for a variety of outlet diameter Of the pump, the inner shell of the material is divided into three categories of metal, rubber and other non-metallic materials, the inner shell of different materials should be interchangeable within the same shell 2 vertical or horizontal single-shell pump - for discharge diameter less than or equal to 200mm low-lift pump 3 drive shaft end of the pump as a cis 4-clockwise direction for the use of the sub-type of pump impeller seal, which allows low efficiency up to 5% (4) Performance clinch impeller 1 should not exceed a maximum head of 63m. The maximum allowable linear speed should not exceed 30m3 / m 2 bearing the general choice of rolling bearings, and the use of thin oil or grease lubrication, the working temperature should not exceed 75 ℃ 3 pump gear housing selection of flexible couplings, belts or hydraulic Coupler and so on. Couplings, V-belts and pulleys shall be provided with safety shields; 4 For bivalve pumps with rubber inner shells, the maximum size of the solid particles in the slurry should not exceed 3 mm and there is no sharp water chestnut; for single-shell pumps, the metal The inner shell of the double-shell pump, the maximum size of solid particles in the slurry should not exceed 80% of the minimum size of the flow cross-section; 5 packing seal water pressure should be higher than the pump outlet pressure 35kpa.
Solar Street Light
Solar road light is a crystalline silicon solar battery power supply, valve control type sealed and maintenance-free battery, gel battery) to store electrical energy, super bright LED as light source, lamps and lanterns and controlled by the intelligent charging and discharging controller, is used to instead of the traditional public power lighting lamps.
Solar road light working principle
1. Using the microcomputer intellective controller to transfer the light energy to electrical energy.Easy to install since to wiring and trenching,energy conservation and environmental protection.
2. The microcomputer intellective controller is composed by advanced special-purpose integrated circuit,high conversion efficiency,prevent over-load and over-discharge,Output short circuit protection,extend work life,on the safe side,convenient usage.
3. High effective Non-maintaining accumulator cell,strong storage,durable usage.
4. Automatic track type time controller,Automatically adjust the working time along with different illumination time in various seasons.For extending the work time energy conservation intellective controller with automatic shut-off the light at Deep-night.
Solar Street Light ,Solar Street Light Pole,Solar Street Light Battery,Solar Street Light Advantages
Jiangsu chengxu Electric Group Co., Ltd , https://www.chengxulightings.com