BQS Series Flameproof Submersible Sand Pump

BQS Series Flameproof Submersible Sand Pump Introduction:

The BQS series mine flameproof submerged sand discharge pump is composed of a water-filled submersible three-phase asynchronous motor and a multi-stage centrifugal pump. Execute the GB 3836.1, GB 3836.2, MT/T671 standard. Compared with the traditional centrifugal pump, it has the advantages of convenient installation and maintenance, not afraid of water, safe and reliable operation, stable performance, low vibration noise, high efficiency, compact structure and low operating cost. According to the actual application environment, the flow guide can be added to the outside of the unit to increase its operational reliability. Because the inner cavity of the motor is filled with clear water, it will not generate electric sparks and explode when working in the water. The pump and motor of the electric pump are split structure, which can be transported separately and can be installed vertically, horizontally and obliquely.

BQS Series Flameproof Submersible Sand Pump Type Designation:

BQS 20 / 50 / 2 / 7.5
B– Mining flameproof type
Q– Submerged pump
S– Sand discharge
20– Rated flow of electric pump (m3/h)
50– Rated lift head of electric pump (m)
2– Number of stages,no indication for single stage
7.5– Rated power of motor (kw)

BQS Series Flameproof Submersible Sand Pump 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. Buthorizontal installation design is available also in special application. The operation model continues 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.

The above condition is the general application condition. The pump should be special design and produce for special conditions.

Mine Flameproof Submersible Sand Pump

BQS series has two types of suction design: single suction, and double suction. Both two types of pumps have two group impellers in back-to-back position. For the double suction structure, suction is on the top of the pump, and another one is on the bottom of the pump. In principle, the thrust force is zero as the two suctions are opposite, and the numbers of the impeller are the same for two sides. For the single-suction type, it has single-suction on the bottom of the pump. If the impeller is even, the numbers of the two groups are the same, and the suction direction is the same. So, the thrust force is zero. If the impeller numbers are singular, the impeller of lower suction is one stage more and the extra impeller has balance holes and a trust balance ring. It can balance the thrust force mostly, so the trust force is nearly zero also. The designs can lower the thrust force of the motor bearing and can help the motor running stable and prolong the service life.

BQW. BQS mining flameproof pollution discharge and desilting submersible pump

At the structural upper part of BQS(BQW)mining flameproof submersible and desilting pump ,motor of special use for it is installed.in the middle part, it is mechanical sealing.at the lower part ,it is pump and composed of motor,mechanical sealing and coaxial connection of pump.

Pump is composed of impeller,volute,inlet segment water outlet and impeller is fixed in key type and tightened with nut .

Motor of flameproof submersible and desilting pump is three-phase AC flameproof and dry squirrel-cage asynchronous motor; for stator winding, P. E W. is used all of which will greatly lengthen service life of motor.

Shell of unit is made of steel and cast iron and it is of safety, reliability and durability in use due to small volume and resistance to pressure and hit .

Special sealing structure is used for entry cables. So, it is impossible for water to enter the inside part of motor.Its shaft extension and rubber oil seal can stop mud and sand.Sealing includes dynamic sealing and static sealing and general double-face mechanical sealing is adopted

Explosion proof submersible pump for coal mine or high head

Model special features: Optimised performance, smooth and reliable operation without blocking, strong sewage desilting capacity, no overload throughout whole head range, input power does not exceed the matching motor power under any condition. Applicable for various occasions under mine, one equipment serves multi-purpose operation.

Mechanical seal improvement: Utilises independent cascade mechanical seal and double-end faces mechanical seal.

Optimised structure: Structural design promotes mechanical sealing, smooth operation, high reliability; optimised design, portability and practicality, low energy consumption, long time operation under no water condition.

IP×8 IP68 motor protection grade, good submersible motor cooling performance, operating temperature is lower than that of other motors, improved durability. F grade insulation gurantees longer service life of motor.