BQW series explosion-proof non-clogging submersible sewage pump structural features

BQW series explosion-proof non-clogging submersible sewage pump for methane or coal dust explosive gas mixture in coal mines, chemical, petroleum and other industries in the safe discharge and other explosion-proof use of places. Thoroughly solve the general submersible sewage pump no special explosion-proof devices dangerous, thick pump can not suction larger particles, and sewage pump easy to plug the problem. Structural features: Flameproof motor is located in the upper part of the pump, flameproof motor insulation class F grade. Shaft seal is a combination of rotary seal ring and double-end mechanical seal, rotary seal ring to prevent the invasion of mud and reduce pump pressure directly on the mechanical seal, played a role in the first seal line of defense, double-end machine Sealed into two groups, the first group on the pump side for the initial seal used to seal the sewage, the second group on the motor side of the secondary seal, used to seal the lubricant leak, a full set of mechanical seal immersed in the No. 20 turbine oil To seal cooling and lubrication. Explosion points: 1, such as electric pump internal explosive mixture explosion, explosion-proof enclosure is not damaged, and the internal explosion can not flameproof joints, causing an explosion of explosive mixture. 2, the components of the flameproof enclosure are made according to GB3836 items 1, 2 and 3 of the hydrostatic test piece by piece to ensure the maximum internal explosion pressure. 3, the flameproof joints between the parts, the length of the gap, roughness are in line with the provisions of GB3836.2. 4, the flameproof shell bolts are equipped with anti-loose washer gasket. Bolt head located in the protection ring, to prevent their own off. 5, the base, cover, shaft, front cover, junction box cover, wiring block, wiring screw, wiring kit are explosion-proof parts. Supplied with 10 meters of explosion-proof cable. Conditions of use: 1, the elevation of not more than 1000 meters; 2, the water temperature does not exceed 40 ℃; 3, the water PH value of 6-9; 4, the power supply voltage is 220V / 380V / 440V / 660V; 5, frequency 50HZ-60HZ; , Containing solid particles and fibers does not exceed the conditions of its provisions; 7, all kinds contain the provisions of the volume of soft material and high viscosity of dirt water; 8, working methods for continuous work system (SI) as the basis for the continuous quota. Note: 1, in order to ensure the safety and reliability of the use of electric pumps, the use of the company should be equipped with a dedicated explosion-proof control box; 2, please use with the pump diameter matching the water pipe, and firmly fixed; 3, electricity Pump explosion-proof control box should be connected to the voltage and frequency of the power supply on the use of voltage fluctuations allowable value of ± 10% of the rated voltage; 4, after starting the pump, pay attention to the impeller's steering is correct, such as the steering does not correspond to timely treatment ; 5, pay attention to the use of electric pump shall not be buried in soil and sand, the outlet pipe shall not allow soil and sand blocking, the best use of suspended when used. The bottom of the pump leaves the soil. Do not allow horizontal placement, but can not fall into the dirt, stop using the pump should be lifted from the water and clean. 6, the mobile pump, you should cut off the power, and must not pull the insulated cables, electric pump operation people may not touch the water; 7, the pump failure, should promptly check and analyze the cause of the pump failure, to take measures After troubleshooting, can continue to use.

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