CN210660635U

CN210660635U - Oil immersed type explosion-proof sewage and dirt submersible pump

Info

Publication number: CN210660635U
Application number: CN201921657896.5U
Authority: CN
Inventors: 郑建兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-02
Anticipated expiration: 2029-09-30

Abstract

An oil immersed type explosion-proof sewage submersible pump is provided with a motor and a pump body, an upper bearing seat is seated at the upper end of a motor shell, a lower bearing seat is connected at the lower end of the motor shell, the lower bearing seat is connected with the pump body, a motor shaft is supported by the upper bearing seat and the lower bearing seat, the motor shaft is connected with an impeller shaft, a leather cup is fixed in a top cap connected at the upper end of the motor shell, a water inlet cavity is formed between the leather cup and the top cap, the inner cavity of the motor shell and the water inlet cavity are isolated by the leather cup, a drain hole is formed in the top cap, a first sealing sheath penetrates through the leather cup and the top cap, the top cap is connected with a top cover, a second sealing sheath penetrates through the top cover, a coil lead of the motor penetrates through. In operation, when the motor temperature rose, the leather cup warp, and its inner chamber increases, the intake antrum reduces, and the water of intake antrum discharges through the wash port, and then reduces the pressure in the motor casing, and after the motor temperature dropped, the leather cup warp and resumes, and external water got into the intake antrum by the wash port.

Description

Oil immersed type explosion-proof sewage and dirt submersible pump

Technical Field

The utility model belongs to the technical field of the water pump technique and specifically relates to an explosion-proof sewage filth immersible pump of oil-immersed type.

Background

The oil immersed sewage submersible pump has the advantages of low temperature rise, long service life and the like. The existing oil-immersed sewage submersible pump adopts a sealing means for preventing water from entering a motor cavity, wherein the upper end of a motor shell is sealed by an upper bearing cover, a top cap with a wiring cavity is connected to the upper bearing, the inner cavity of the motor shell is isolated from the wiring cavity by the upper bearing, a sealing sheath is arranged on the upper bearing cover in a penetrating manner, and a coil lead of a motor is connected with an external power line in the wiring cavity after penetrating through the sealing sheath. The existing sealing means has the problems that the pressure in the motor shell is small in a normal use state, but when abnormal conditions of large working load, power supply shortage and the like are met, the temperature of the motor rises too fast, expansion of cooling oil and air can be caused, the pressure in the motor shell is increased, and when the pressure reaches the level that the motor shell cannot bear, the pressure is burst, accidents are caused, water pollution, property loss and the like are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof sewage filth immersible pump of oil-immersed type, this immersible pump can decompress when its motor casing internal pressure risees.

In order to achieve the above purpose, the utility model adopts the following scheme: an oil immersed type explosion-proof sewage and sewage submersible pump is provided with a motor and a pump body, wherein an upper bearing seat is seated at the upper end of a motor shell of the motor, a lower bearing seat is connected at the lower end of the motor shell, the lower bearing seat is connected with a pump shell of the pump body, a motor shaft of the motor is supported by the upper bearing seat and the lower bearing seat, the motor shaft is connected with an impeller shaft in the pump shell, a top cap is connected at the upper end of the motor shell, an elastic leather cup is fixed in the top cap, the inner cavity of the leather cup is communicated with the inner cavity of the motor shell, a water inlet cavity is formed between the outer side surface of the leather cup and the top cap, the leather cup isolates the inner cavity of the motor shell from the water inlet cavity, a drain hole for communicating the water inlet cavity with the outside is formed on the side wall of the top cap, a first sealing sheath penetrates through the bottom of the leather cup and the top wall of the top cap, the upper end of the top cap is connected with a top cap, a wiring cavity, the power wire passes through the second sealing sheath and enters the wiring cavity to be connected with the coil lead.

According to the scheme, the utility model provides an explosion-proof sewage filth immersible pump of oil-immersed type is at work, when the motor temperature rose, the cooling oil and the air inflation inside the motor casing, the leather cup was outwards extruded, because the leather cup has elasticity, the leather cup warp, its inner chamber increases, the intake antrum reduces, the water in intake antrum discharges through the wash port on the hood simultaneously, and then reduced the pressure inside the motor casing, when the motor temperature dropped, when cooling oil and the air pressure in the motor casing dropped, the leather cup warp and resumes, external water got into the intake antrum through the wash port; in addition, the leather cup is arranged to isolate the inner cavity of the motor shell from the water inlet cavity ideally, so that external water cannot enter the motor.

The utility model discloses rational in infrastructure, dependable performance, it has the explosion-proof performance of ideal to long service life.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the cup of the embodiment shown in FIG. 1;

FIG. 3 is a cross-sectional view of the cup of FIG. 2;

3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 3 3. 3

Detailed Description

The present invention will be further described with reference to the following specific embodiments and the accompanying drawings.

See FIG. 1

The utility model provides an explosion-proof sewage filth immersible pump of oil-immersed type has motor 9 and the pump body 11, and motor 9 has motor casing 9d, motor shaft 9a, rotor 9c, coil 9 b. An upper bearing seat 8 is seated at the upper end of a motor shell 9d, a lower bearing seat 10 is connected at the lower end of the motor shell 9d, the lower bearing seat 10 is connected with a pump shell of a pump body 11, a motor shaft 9a is supported by the upper bearing seat 8 and the lower bearing seat 10, and the motor shaft 9a is connected with an impeller shaft in the pump body 11. The connection of the motor shaft 9a to the impeller shaft is of conventional construction and is not shown in figure 1. The upper end of the motor casing 9d is connected with a top cap 6, an elastic leather cup 7 is fixed in the top cap 6, the leather cup 7 is made of rubber, an opening 8a is formed in the upper bearing seat 8, the inner cavity of the leather cup 7 is communicated with the inner cavity of the motor casing 9d through the opening 8a, a water inlet cavity 12 is formed between the outer side surface of the leather cup 7 and the top cap 6, the leather cup 7 isolates the inner cavity of the motor casing 9d from the water inlet cavity 12, and a water drain hole 6a for communicating the water inlet cavity 12 with the outside is formed in the side wall of the top cap 6. The first sealing sheath 5 penetrates through the bottom of the leather cup 7 and the top wall of the top cap 6, the upper end of the top cap 6 is connected with a top cover 1, a wiring cavity 13 is formed between the top cover 1 and the top cap 6, the second sealing sheath 2 penetrates through the upper end of the top cover 1, a coil lead 4 of the motor penetrates through the first sealing sheath 5 to enter the wiring cavity 13, and a power line 3 penetrates through the second sealing sheath 2 to enter the wiring cavity to be connected with the coil lead 4.

In this embodiment, the opening of the leather cup 7 is provided with a turned-over edge 7b protruding outwards, the turned-over edge 7b is clamped by the top cap 6 and the motor casing 9d, the bottom of the leather cup 7 is connected with the top wall of the top cap 6, the middle of the bottom of the leather cup 7 is provided with a through hole 7a, the middle of the top wall of the top cap 6 is provided with a boss 6b, the boss 6b extends into the through hole 7a in the bottom of the leather cup, the boss 6b is provided with a threading hole, and the first sealing sheath 5 is arranged in the threading hole.

See fig. 2, 3, 4

In this embodiment, the cup wall of the cup 7 has more than two pits 7c recessed into the inner cavity of the cup along the circumferential direction, and the pits 7c make the inner surface and the outer surface of the cup wall of the cup 7 uneven. By adopting the structure, the deformation coefficient of the leather cup can be increased, the deformation rate of the leather cup is improved, and the pressure can be better reduced.

In this embodiment, the surface 7d of the concave on the leather cup 7 is gradually inclined outward along the direction from the bottom of the cup to the mouth of the cup. With this structure, the effect achieved is that the slurry contained in the sewage entering the water inlet chamber 12 can smoothly flow out along the outer surface 7d of the pit, and will not be retained in the pit 7 c.

Claims

1. The explosion-proof sewage filth immersible pump of oily formula has the motor and the pump body, and the motor casing upper end of motor is taken a seat and is had bolster bearing housing, and the motor casing lower extreme hookup has the step, and the step couples with the pump case of the pump body, and the motor shaft of motor is by bolster bearing housing, step support, and the motor shaft links to each other its characterized in that with the impeller shaft in the pump case: the upper end of the motor shell is connected with a top cap, an elastic leather cup is fixed in the top cap, the inner cavity of the leather cup is communicated with the inner cavity of the motor shell, a water inlet cavity is formed between the outer side surface of the leather cup and the top cap, the leather cup isolates the inner cavity of the motor shell from the water inlet cavity, a drain hole which communicates the water inlet cavity with the outside is formed in the side wall of the top cap, a first sealing sheath penetrates through the bottom of the leather cup and the top wall of the top cap, the upper end of the top cap is connected with a top cover, a wiring cavity is formed between the top cover and the top cap, a second sealing sheath penetrates through the upper end of the top cover, a coil lead of the motor penetrates through the first sealing sheath to enter the wiring cavity, and a power line penetrates through the second sealing sheath to enter the wiring cavity to be.

2. The oil immersed type explosion-proof sewage and sewage submersible pump according to claim 1, characterized in that: the bowl mouth of the leather bowl is provided with a flanging protruding outwards, the flanging is clamped tightly by the top cap and the motor shell, the bowl bottom of the leather bowl is connected with the top wall of the top cap, the middle part of the bowl bottom of the leather bowl is provided with a through hole, the middle part of the top wall of the top cap is provided with a boss, the boss extends into the through hole in the bowl bottom, the boss is provided with a threading hole, and the first sealing sheath is arranged in the threading hole.

3. The oil immersed type explosion-proof sewage and sewage submersible pump according to claim 1, characterized in that: more than two pits sunk into the inner cavity of the leather cup are arranged on the cup wall of the leather cup along the circumferential direction, and the inner surface and the outer surface of the cup wall of the leather cup are uneven due to the pits.

4. The oil immersed type explosion-proof sewage and sewage submersible pump according to claim 3, characterized in that: the outer surface of the concave pit on the leather cup is gradually inclined outwards along the direction from the bottom of the cup to the mouth of the cup.