CN2303101Y

CN2303101Y - Up-side down type submersible pump

Info

Publication number: CN2303101Y
Application number: CN 97216898
Authority: CN
Inventors: 崔殿民; 崔殿福
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-09
Filing date: 1997-05-09
Publication date: 1999-01-06
Anticipated expiration: 2007-05-09

Abstract

The utility model relates to an up-side down type submersible pump, comprising a motor of a water pump, an impeller, and a water feeding tube and a water discharging tube which are respectively arranged on the pump body. The utility model is characterized in that the impeller is arranged in a cavity provided with the ports of the water feeding tube and the water discharging tube at the lower part of the pump body connected with a motor case via pressing covers at a front, a middle and a back ends to form a multi-stage sealing structure; the top end of the pump body is provided with a telescopic pressure regulating capsule which is communicated with the inner cavity of the motor via a through hole of an end cover to automatically regulate the pressure difference in and out of the motor body. The utility model has the advantages of simple structure and reasonable design, provides safety guard via multi-stage sealing and an alarm device, and can extend the service life of the submersible pump.

Description

Upside-down automatic Regulation submersible pump

The utility model relates to a kind of submersible pump, is that prior art constructions has been done improvement specifically.

Had by domestic production manufacturing and widely used submersible pump at present: 1. immersion type submersible pump, this pump pull the plug when using, and are fully immersed in the water inside and outside the motor casing.Because working environment is higher to the electrical machine insulation performance requirement, so motor stator winding must adopt crust that the special water proof wire of very thick High Performance Insulation thing is arranged again, thereby cause line directly to increase, so under the certain situation of umber of turn, must strengthen stator slot, relatively just reduce the iron core magnetic conductive area, reduced power of motor.Be subjected to the resistance of water by the rotor rotation equally, thereby also reduced the useful horsepower of motor.Because the sealing of the pump housing is bad, stator, rotor are rotated for a long time in water simultaneously, make its heavy corrosion and enhance faster wear, shorten the working life of submersible pump greatly.This pump accounts for more than 90% of application quantity.2. oil-immersed diving pump.When promptly producing this pump, fill with senior fluid in the motor casing, in order to solving the shortcoming of above-mentioned sealing, but during submersible pump work, oily temperature rise, interior pressure increases, and causes the rotor resistance to strengthen on the contrary, reduces motor useful horsepower.Fluid leaks outside simultaneously, contaminate wells, and after the water pump shutdown, produce negative pressure in the casing, and cause water inlet in the casing, cause short circuit in winding then, burn-down of electric motor.3. dry pump.This pump has designed the better seal device, and medium is an atmospheric air in the motor casing.But use proof, dive when working in water when pump, the inside and outside pressure of motor casing differs greatly, in case Sealing has damage slightly, water enters casing very soon, causes pump motor to burn.Very high to the sealed precision requirement simultaneously, manufacture difficulty is big.

The purpose of this utility model is the problem and shortage of above-mentioned existence, and provides a kind of simple in structure, can improve the submersible pump upside-down automatic Regulation submersible pump in working life.

For achieving the above object, technical solution of the present utility model is finished by following measure: upside-down automatic Regulation submersible pump, by motor for submerged pump, the impeller and the pump housing have the water inlet and outlet mouth of pipe respectively and form, comprise that also impeller on the described pump housing motor shaft is arranged on the lower end and has in the cavity of the pump case of the water inlet and outlet mouth of pipe and the upside-down that the front end gland constitutes by one, respectively by the flange end and the mid-end sealing cover compression fit of motor shaft front end gland, and be fixed as one by rear side electric motor end cap and electric machine casing, form the multi-stage sealed structure of decompression chamber and closed chamber; And install on the top end cover of the pump housing and be provided with flexible pressure regulation capsule, pressure regulation capsule inner chamber is communicated with motor cavity by the through hole that has on the top end cover, adjust in the pump housing and the balance of external pressure.

The utility model has following advantage compared to existing technology:

1, the impeller that adopts of submersible pump and the turnover water pipe lower end that is arranged on motor makes to be multi-stage sealed structure between impeller and the motor, and be provided with spilled water hole on decompression chamber, has controlled the water inlet in the pump motor shell, has prolonged the working life of motor.

2, by the top of pump motor telescopic pressure regulation capsule is housed, can effectively controls and regulate the bigger pressure difference of the inside and outside generation of the pump housing, make it inside and outside pressure equilibrium, avoided permeating in body because of inside and outside pressure imbalance causes outside water.

3, also be provided with the water-level alarm device in the body.Because of the wearing and tearing of body inner seal liner cause intaking in the body.When the water inlet water level touches Alarm contactor, make warning device send alarm signal, should stop using immediately this moment, avoided the complete machine loss.

To be further described in conjunction with the accompanying drawing embodiment that the utility model provides:

Fig. 1 is a upside-down automatic Regulation submersible pump topology view.

By shown in Figure 1, upside-down automatic Regulation submersible pump, by motor for submerged pump 7, what have respectively on the impeller 10 and the pump housing advances, effluent pipe mouth is formed, in the upside-down cavity that impeller on the pump housing motor shaft 10 is arranged on pump housing lower end and constitutes by pump case 1 that has the water inlet and outlet mouth of pipe and 2 sealings of front end gland, respectively by the flange end and mid-end cap 4 compression fit of motor shaft front end gland 2, sealing cover 4 is installed on the rear side electric motor end cap 5, and front end gland 2 is connected with rear side electric motor end cap 5 by lock bolt, and by electric motor end cap 5, its seal that connects into integral body is fixedlyed connected with electric machine casing be integral, form the multi-stage sealed structure that is divided into decompression chamber and closed chamber.For preventing that small part water is under the pressure of impeller 10, enter the decompression chamber that forms with end cover 4 spaces and continue along the gap of front end gland 2 and motor shaft and enter in the closed chamber that forms by electric motor end cap 5 and mid-end cap 4, and at the equally distributed spilled water hole 3 of radially opening of front end gland 2 flanges.And after the pump housing pulls the plug, produce big pressure difference because the pump housing is inside and outside, and fixed installation on the pump housing top end cover is provided with pressure regulation capsule 9.The inner chamber of pressure regulation capsule 9 is communicated with motor 7 inner chambers by the through hole that has on the top end cover, utilizes the flexible adjustment that carries out automatically of pressure regulation capsule 9, pilot pressure water immerses in the pump housing.Be similarly and prevent that the pump housing water inlet from burning motor, also be provided with Alarm contactor 6, and see through stator and be connected on the wiring terminal 8, draw the connection alarm by the indoor power lead of wiring at its motor 7 inner chambers.When pump housing sealing part abrasion, cause water inlet in the motor casing, when the water level of intaking this moment contacted with Alarm contactor 6, alarm promptly sent alarm signal, and quits work immediately, can avoid the damage of motor effectively.

Claims

1, upside-down automatic Regulation submersible pump, comprise that motor for submerged pump, impeller and the pump housing have the water inlet and outlet mouth of pipe respectively and form, it is characterized in that impeller (10) on the described pump housing motor shaft is arranged in the cavity of the upside-down that the lower end is made of a pump case (1) that has a water inlet and outlet mouth of pipe and front end gland (2), respectively by the flange end and mid-end sealing cover (4) compression fit of motor shaft front end gland (2), and be fixed as one by rear side electric motor end cap (5) and electric machine casing, form the multi-stage sealed structure of decompression chamber and closed chamber; And install on the top end cover of the pump housing and be provided with flexible pressure regulation capsule (9), pressure regulation capsule (9) inner chamber is communicated with motor (7) inner chamber by the through hole that has on the top end cover, adjust in the pump housing and the balance of external pressure.

2, by the described submersible pump of claim 1, what it is characterized in that front end gland (2) flange radially is evenly distributed with spilled water hole (3).

3, by the described submersible pump of claim 1, it is characterized in that motor (7) inner chamber also is provided with Alarm contactor (6), see through stator and be connected on the wiring terminal (8).