Features of the BQS (BQW) Explosion-Proof Submersible Sand‑Removal and Sewage‑Pumping Electric Pump for Mining Applications

The BQW‑type explosion‑proof submersible sewage electric pump is an externally mounted unit comprising an explosion‑proof submersible motor directly coupled to a centrifugal pump via a common shaft. Featuring a bottom‑suction design, it is an advanced and reliable drainage device. The product has undergone rigorous testing by the Shanghai Electrical Explosion‑Proof Inspection Station of the National Coal Industry and complies with the requirements of Q/H001‑2004, having obtained both an explosion‑proof certificate and the MA safety mark for mining products. It is suitable for use in underground mine roadways, working faces, or other environments where the surrounding medium contains explosive mixtures of methane or coal dust, as well as in other explosion‑proof locations, and possesses the following characteristics:

· Explosion-proof for mining use, with a compact structure and lightweight design, making it ideally suited for handling and installation in mine shafts;

·The entire unit operates submerged, eliminating the need to construct a pump house and reducing installation costs;

·No priming is required at startup; it can be started instantly.

·Compared with non-submersible pump units, it is resistant to flooding.

·Low operating noise and minimal vibration;

·Double-ended sealing, durable and long-lasting, safe and reliable.

Main applications of the BQS (BQW) explosion-proof submersible sand‑removal and sewage‑pumping electric pump for mining use

It is primarily used for conveying coal‑water mixtures containing suspended coal particles. Its operating range covers flow rates from 20 m³/h to 600 m³/h and head pressures from 15 m to 700 m. The pump can be installed vertically, at an incline, or even horizontally, and it is equipped with a dedicated constant‑pressure diversion hood for underground mine drainage, ensuring complete removal of water from the mine. It features a well‑designed structure, high efficiency and energy savings, convenient installation and maintenance, and reliable operation.

Meaning of the Model Designation for BQS (BQW) Explosion-Proof Submersible Sand‑Removal and Sewage‑Pumping Electric Pump for Mining Applications

For example: BQW 10-28-2.2

B- Flameproof Electric Pump

Q-Diving

W-Discharge

S-Sand Discharge

10- Rated flow rate of the electric pump (m³/h)

28- Rated head of the electric pump (m)

2.2 – Rated Power of the Electric Motor (kW)

Wenzhou

Operating Conditions for BQS (BQW) Explosion-Proof Sand-Removal and Sewage-Discharge Electric Pump for Mining Use

a. Submergence depth not exceeding 70 m;

b. Water temperature within the range of 0°C to 40°C (special ordering required for temperatures outside this range).

c. The pH of the water is in the range of 4 to 10;

d. The volume fraction of solid impurities in the water generally does not exceed 5%;

e. Underground coal mines with areas at risk of gas and coal-dust explosions;

f. The power supply shall be three-phase 380 V or 660 V, with a frequency of 50 Hz; the voltage fluctuation shall not exceed ±5%.

g. Explosion-proof type; flameproof type for mining use

h. Explosion-proof marking: ExdI