I. Product Overview Hunan Electric Co., Ltd. is the production of Chaoyang professional manufacturer of submersible pumps, plant area of ??158,000 square meters, 25 years of professional experience in production and improve the testing equipment, over the years the company continued commitment to product development and improve quality. WQ-submersible sewage pump is my factory to the vast rural areas, factories, mines, construction and other users dedicated another new product, the products from the submersible motors, pumps, seals three parts. Located in the lower pump products, electrical products located in the upper part, is a convenient removable water drainage. Second, the model significance example: W Q150 - 20 - 15 WQ: sewage submersible pump 150: Rated flow (m3 / h) 20: Rated head (m) 15: Rated power (kw) Third, the characteristics of the pump and motor coaxial using pump structure, attractive appearance, reasonable design, excellent performance, easy maintenance, high efficiency, wide operating conditions, durable, safe and reliable. Fourth, the use of premises WQ-submersible sewage pump with its superior performance, can be widely used in many fields of the national economy. (1) rural irrigation and drainage; (2) building, factory, mine drainage; (3) urban sanitation Sewage treatment; (4) work surface dewatering, drainage; (5) the mine water storage dredging. Fifth, use conditions (1) the water temperature does not exceed + 40 ℃; PH value (2) water quality between 5-9; (3) the right amount of sewage pumping water containing solid particles and fibrous tissue; (4) pump diving depth between 0.5-5 meters, the deepest of not more than 10 meters. Six, Structure Description WQ-submersible sewage pump from the motor, seal and pump three parts. 1, the motor pump is located in the upper part of the motor, three-phase squirrel cage induction motor vertical. Insulation class B. 4KW and below the motor with star connection, 5.5KW and above the motor delta connection. Whether star connection or delta connection, the motor will lead to a three-phase connection cable. Motor cable type or the same performance as YZW other models, four-core cables for medium-sized rubber cables, including a green-yellow ground wire. Motor heat is cooled by the outside water, so the water pump should be completely invasive use, good cooling conditions. 2, sealing sealing sealing and static sealing splitter into two parts. Dynamic seal boxes were sealed with the overall structure and dual bellows seal bulk or two single seal structure, mechanical seal oil chamber filled with 5-10 machine oil for lubrication and cooling of the mechanical seal. Static seal pump located at the mouth of the parts with only using "O" type oil and rubber sealing ring, can play a very good static sealing effect. 3, the pump is located in the lower part of the pump motor impeller, volute, base and fittings and other components. According to user requirements, can be made into a single flow impeller dual channel, cyclone, etc., can also be used for the material needs. Water from the suction side of the base, through the impeller and volute exclude reach sewage pumping purposes. Seven assembly and disassembly sequence 1, the assembly of the motor: Stator - cover - outlet box - rotor assembly (including press-fit bearings) - Under Cover - by tapping sleeve rotor in place - Mechanical Seals - oil chamber - to try to pressure - the oil chamber oiling - seals. Pump assembly: the assembled motor impeller coat - washers - impeller nut - volute casing - base - Headers, handle. Note that when assembled, each of the mouth should be painted only calcium-based butter. 2, pump disassembly pump disassembly by the reverse order of assembly.