Overview
Product specifications of BQS(BQW) series mining flameproof submersible and desilting pump are compiled according to national standard GB9969.1-1999 General Principles on Compilation of Use Instructions for Industrial Products.
(1) Execution standards and features of product
Execution standard of BQS(BQW) mining flameproof submersible and desilting pump (hereinafter referred to as pump ) is MT/T671-2005 Coal Mining Flameproof Submersible Pump and flameproof way of motor is “Exdl”. So,such pump has such advantages as compact structure,small,easy move,no need for water diversion ,sealing on double sides , durable in use, safe and reliable and strong adaptation.
(2) Main functions and applicable scope of products
It is a kind of advanced and reliable drainage tool, used for drainage of working face, road way,dibhole at well bottom,local plash, coal preparation plant and project.
It is applicable to underworkings and coal mining face.Underwater and sewage including suspend-ing coal dust,debris,coal granule,sand stone and sand are discharged in environment with mixture of methanol, coal  dust and explosive gas in surrounding medium.
(3) Representing methods for models of mining flameproof submersible and desilting pump 
Chinese phonetic alphabet stands for model and features of pump, but its main parameters are represented with Arabic numerical.

ypeTexplanation

Structural features and woring principles
(1) Structural features of product
1. 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.
2. Pump is composed of impeller, volute, inlet segment water outlet and impeller is fixed in key type and tightened with nut.
3. 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.
4. 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.
5. 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.
(2) Working principles of product
After turning on power for pump,stator will produce rotating magnetic field to make rotor to rotate and drive the rotation of impeller. Due to centrifugal role of blade,water will be lifted to ideal height trough water pipe by passing volute with rapid flow and high pressure.

基本参数表下载： BQS矿用隔爆型潜水排沙电泵.doc