BQS series submersible motor pump complete with water filled three phase asynchronous motor and multistage centrifugal pump, and operating under water. It applied national standard GB 3836.1, GB3836.2, MT/T671. Compare with traditional mining centrifugal pump, it has features: Convenience for installation, operation and maintenance; submersible type; stable and safety operation; stable performance; lower noise; higher efficiency, compact structure, lower operation cost. Meanwhile, pump house is not necessary, automatic control available; it is especially suitable for higher water lever different and the site with water flushing menace.
BQS series explore-proof submersible pump can be used for delivery clean water or the liquids with similar physical and chemical character. It mainly used in mine drainage, and it can be used for factory, water lift from deep well for city. Especially, it can be used for water drainage of emergency.
BQS series explore-proof submersible is mainly used for drainage sewage water from channel and working platform in coal mine or other area where content firedamp or other explosive gas in the air. It can be free type installation for temporary water drainage of emergency.
SAFTY CERTIFICATES OF APPROVAL FOR MINING PRODUCTS, EXPLORE-PROOF CERTIFICATES are available for complete range.
l Model meaning
Note: Head can be specified by single stage head × stages
The motor pump is Explore-proof type, the mark is “ExdbI”
l Application condition
1. Power supply: Three Phase, rated voltage 660V, 1140V, 6000V, 10000V, permit voltage wave: ±5%
2. Permit environment temperature: 0℃~40℃;
3. Max. liquid Temperature: 40℃
4. The PH value should be 6~8.
5. The solid content should be less than 2%;
6. The Max. submersed depth should be less than 70m.
7. The vertical installation is recommended. But, horizontal installation design is available also in special application. The operation model is continue running.
8. The pump can operate in the area where content firedamp or other explosive gas in the air. It can operate in the area where content gas.
Above condition is the general application condition. The pump should be special design and produce for special conditions.
l Structure features
BQS series have two types of suction deign, single suction and double suction; both these two type of pump have two group impeller in back to back position. For the double suction structure, a suction on the top of pump, and another one on the bottom of the pump, in principal, the thrust force is zero as the two suctions are opposite, and the numbers of impeller is same for two sides. For the single suction type, have single suction on the bottom of the pump. If the impeller is even, the numbers of two groups is same, and suction direction is same. So, the trust force is zero. If the impeller numbers is singular, the impeller of lower suction is one stage more and the extra impeller has balance holes and trust balance ring, it can balance the trust force mostly, so the trust force is nearly zero also. The designs can lower the thrust force of motor bearing; it can help the motor running stable and prolong the service life.
YBQ series explore-proof motor is water filled asynchronous type, it is one type of explore-proof motor; the power cable is 4 cores mine cable, out of these four cables, three cores is power cable, and 1 core is earth cable; for better cooling, cooling channel is fitted on the motor casing for speeding the cooling water circulation, and an extra impeller is fitted on the bottom of rotor to accelerate circulation of cooling water, and the extra radiator is fitted on the bottom of motor, all these measure can reinforce the radiant effect; reduce motor temperature raising; improve the motor reliability obviously; ensure the quality of motor. The temperature sensor and water level sensor can be fitted for monitoring the temperature of winding wire and avoiding dry running of motor according to the application and customer’s request; and water level sensor for well water level can be supplied as the customer’s request.
BQS series submersible motor pump have centrifugal type of impeller and mixed flow type; Non-return valve is fitted on the top of pump to protect the pump working parts from damage by back flow of water when the pump stop. There are water leakage hole on the valve plate, so the water can release slowly after the pump stopped, this can protect the delivery pipe from frozen crack. The impeller is close type for higher pump efficiency; screen is fitted on the suction of pump to prevent the impeller from jam by bigger size passing.
YBQ series submersible motor pump is three phase squirrel cage asynchronous motor, the motor is located on the bottom of the pump, it is water filled type, the design of connections of parts and the clearance of shaft end following explore-proof standard. The guide bearing and thrust adopt water lubrication material. The motor filled with clean water for motor cooling and bearing lubrication. The high capacity thrust bearing locate on the bottom of motor, it has high capacity, ensure the motor pump set can running stable and has long service life.
l Technical character
1. Applied standard
2. Main parameters of BQS pump
The main performance parameters of 6000V and 10000V series pump see the table 1, the motor performance parameters see the table 2.
The main performance parameters of 660V and 1140V series pump see the table 1, the motor performance parameters see the table 2.
l Supply scope
1. Motor pump: BQS series pump, YBQ series submersible motor, cooling jacket, Tramcar
2. Pipe: Short pipe, delivery pipe, elbow, seal washer, fittings, Non-return valve for delivery pipe.
3. Cable: Power cable and cable connection material.
4. Control panel: Control panel, Automatic control system.
