Submersible sewage pump

Abstract

The utility model discloses a submersible sewage pump which comprises a stainless steel machine shell, a wire outlet box cover, a motor, a motor front end cover, a motor rear end cover, an L-shaped sealing ring, a sealing groove and a pump body assembly. By means of the mode, the submersible sewage pump can improve the convenience of installation of the sealing ring and prevent the sealing ring from being damaged in the installation process, so that the sealing performance of the pump body is improved, meanwhile, through cooperation of the pump body supporting bottom plate, the water inlet and the filtering mechanism, the stability of installation and use of the body can be effectively improved, and the service life of the body is prolonged. The water inlet is prevented from being blocked by dirt, and normal operation of the pump body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a submersible sewage pump. Background Art

[0002] For most submersible sewage pumps on the market, the water inlet is arranged at the lower part of the pump body and is placed on the hard bottom of the pit through the pump body feet. If placed on the soft bottom of the pit, the pump body feet may sink into the ground, resulting in the blockage of the water inlet and affecting the operation of the water pump. When the water pump works for a long time, water is sucked into the water inlet, and sundries at the bottom of the pit will be brought into the impeller. The rotating impeller rubs against the sundries, which will cause the impeller to wear. At the same time, the water at the water inlet will generate a reverse force on the pump, causing the water pump to slowly sink into the ground and affecting the operation of the water pump.

[0003] In addition, the stainless steel circular casing generally uses an O-ring for compression sealing. The O-ring sealing requires a certain amount of compression and needs to be lubricated with grease. During the installation process, after the inner edge of the circular casing is chamfered, the sharp circumference will shear or wear off a part of the O-ring when the O-ring is sleeved, resulting in seal failure and leakage. Summary of the Utility Model

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0005] To provide a submersible sewage pump, which includes: a casing, an outlet box cover, a motor, a motor front end cover, a motor rear end cover, an L-shaped sealing ring, a sealing groove, and a pump body assembly.

[0006] The casing is sleeved on the motor. The motor front end cover and the motor rear end cover are respectively arranged at both ends of the motor. The pump body assembly is connected to the motor front end cover. The outlet box cover is connected to the motor rear end cover. The sealing groove is arranged at the top of the motor front end cover and the bottom of the outlet box cover. The horizontal part of the L-shaped sealing ring is arranged in the sealing groove, and the vertical part of the L-shaped sealing ring extends outward into the casing to form a guiding connection groove for guiding the connection of the casing, so that the casing is tightly connected with the L-shaped sealing ring to seal the connection between the casing and the outlet box cover and the motor front end cover.

[0007] The pump body assembly includes a pump body housing, an impeller, a gasket, a pump body support bottom plate, a water inlet, a sewage discharge hole, and a filter grid. The pump body housing is in contact with the front end cover of the motor. The pump body support bottom plate is hermetically connected to the bottom of the pump body housing and forms a cavity for water inlet and drainage. The impeller is movably arranged in the cavity. The top surface of the pump body housing is provided with the water inlet. A plurality of the filter grids are vertically arranged around the water inlet. There are filter gaps between the top of the filter grid and the front end cover of the motor and between two adjacent filter grids to filter the water being sucked in. The pump body support bottom plate is provided with the sewage discharge hole connected to the cavity, and the sewage discharge hole and the water inlet are concentric structures. The rotating shaft of the motor passes through the front end cover of the motor and the water inlet on the pump body housing and extends into the cavity to be connected to the impeller and communicate with the cavity.

[0008] In a preferred embodiment of the present utility model, the motor is connected to the front end cover and the rear end cover of the motor by screws.

[0009] In a preferred embodiment of the present utility model, the pump body housing and the front end cover of the motor are fastened by screws, and the wire outlet box cover and the rear end cover of the motor are fastened by screws.

[0010] In a preferred embodiment of the present utility model, the end face of the machine shell is closely attached to the horizontal part of the L-shaped sealing ring, and the inner wall of the stainless steel machine shell is closely attached to the vertical part of the L-shaped sealing ring.

[0011] In a preferred embodiment of the present utility model, the pump body support bottom plate is connected to the pump body housing by screws.

[0012] In a preferred embodiment of the present utility model, the filter grid has a structure that is thinner at the top and thicker at the bottom and has a trapezoidal cross-section.

[0013] In a preferred embodiment of the present utility model, a gasket is provided at the connection between the pump body support bottom plate and the pump body housing.

[0014] In a preferred embodiment of the present utility model, the water inlet is arranged at the central position of the top surface of the pump body housing.

[0015] In a preferred embodiment of the present utility model, an oil seal is provided at the output end of the motor rotating shaft.

[0016] In a preferred embodiment of the present utility model, an upper water outlet is provided on the top surface of the pump body housing outside the filter grid.

[0017] The beneficial effects of the present utility model are as follows: It can improve the convenience of installing the sealing ring and prevent damage to the sealing ring during installation, thereby improving the sealing performance of the pump body. At the same time, through the cooperation of the pump body support base plate, the water inlet and the filtering mechanism, the stability of the installation and use of the main body can be effectively improved, preventing the water inlet from being blocked by dirt and ensuring the normal operation of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0019] Figure 1 FIG. 9 is an exploded structural schematic diagram of a preferred embodiment of a submersible sewage pump of the present utility model;

[0020] Figure 2 FIG. 13 is a structural schematic diagram of an L-shaped sealing ring and a sealing groove of a preferred embodiment of a submersible sewage pump of the present utility model;

[0021] Figure 3 FIG. 17 is a sectional structural schematic diagram of a preferred embodiment of a submersible sewage pump of the present utility model;

[0022] Figure 4 FIG. 21 is a structural schematic diagram of a pump body assembly of a preferred embodiment of a submersible sewage pump of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] Please refer to Figures 1-4 , the embodiments of the present utility model include:

[0025] A submersible sewage pump, the structure of which includes: a stainless steel casing 1, a cable outlet box cover 2, a motor 3, a motor front end cover 31, a motor rear end cover 32, an L-shaped sealing ring 4, a sealing groove 5, and a pump body assembly 6.

[0026] The stainless steel casing is sleeved on the motor. The front end cover and the rear end cover of the motor are respectively arranged at both ends of the motor. The pump body assembly is connected to the front end cover of the motor, and the outlet box cover is connected to the rear end cover of the motor. A sealing groove is respectively arranged at the top of the front end cover of the motor and the bottom of the outlet box cover. The horizontal part of the L-shaped sealing ring is arranged in the sealing groove, and the vertical part of the L-shaped sealing ring extends outward into the stainless steel casing to form a guiding connection groove 41. The front end of the stainless steel casing is sleeved in the guiding connection groove of the L-shaped sealing ring on the front end cover of the motor, and the rear end of the stainless steel casing is sleeved in the guiding connection groove of the L-shaped sealing ring on the outlet box cover, so as to seal the connection between the stainless steel casing and the outlet box cover and the front end cover of the motor through the L-shaped sealing ring.

[0027] Since the L-shaped sealing ring is provided with a guiding connection groove, the stainless steel casing can be more conveniently and efficiently sleeved outside the vertical part of the L-shaped sealing ring without chamfering the stainless steel casing and without applying lubricating fluid to the L-shaped sealing ring. Then, the two ends of the stainless steel casing are pressed tightly against the L-shaped sealing ring through the outlet box cover to achieve a sealing effect. Compared with the O-ring seal installation, it is simpler and has better sealing performance.

[0028] Further preferably, the motor is connected to the front end cover and the rear end cover of the motor through screws.

[0029] Further preferably, the pump body assembly and the front end cover of the motor are fastened through screws, and the outlet box cover and the rear end cover of the motor are fastened through screws.

[0030] Further preferably, the end face of the stainless steel casing is closely attached to the horizontal part of the L-shaped sealing ring, and the inner wall of the stainless steel casing is closely attached to the vertical part of the L-shaped sealing ring.

[0031] The pump body assembly includes a pump body housing 61, an impeller 62, a gasket 63, a pump body support bottom plate 64, a water inlet 65, a sewage discharge hole 66, and a filter grid 67.

[0032] The top surface of the pump body housing is connected to / contacted with four fixing posts on the front end cover of the motor. The pump body support bottom plate is connected to the bottom of the pump body housing, and a gasket is arranged at the connection between the pump body support bottom plate and the pump body housing, so that the pump body support bottom plate and the pump body housing cooperate to form a cavity for water inlet and drainage. The impeller is movably arranged in the cavity. The threaded end of the middle rotating shaft 33 of the motor passes through the front end cover of the motor and the oil seal 7, extends into the cavity from the water inlet on the pump body housing, and the impeller is installed on the threaded end of the rotating shaft, so as to drive the impeller to rotate through the motor.

[0033] The pump body support bottom plate can support the entire pump body on a soft ground. In this way, when the impeller works, the pump body support bottom plate can increase the contact area between the ground and the bottom surface of the pump, preventing the pump body from being sucked into the ground by sediment and causing the water inlet to be blocked.

[0034] The water inlet is arranged on the top surface of the pump body housing and is communicated with the cavity. A plurality of filter grids are vertically and evenly distributed around the water inlet. Filter gaps 68 are arranged between the top of the filter grids and the front end cover of the motor and between two adjacent filter grids to form a filtering layer, so as to filter the sucked water and prevent the water inlet from being blocked. A sewage discharge hole connected to the cavity is arranged on the pump body support bottom plate, and the sewage discharge hole is concentrically arranged with the water inlet.

[0035] When the impeller rotates and works, water first enters through the filtering layer on the upper part of the pump body for filtering and flows into the cavity through the water inlet. The water in the cavity generates pressure after being accelerated by the impeller. A very small part of the water flows out of the pump body through the sewage discharge hole and takes out some sediments in the pump body, further preventing the sediments from blocking the pump body.

[0036] Further preferably, the pump body support bottom plate is connected to the pump body housing by screws.

[0037] Further preferably, the filter grid has a structure with a thinner upper part and a thicker lower part and a trapezoidal cross-section.

[0038] Further preferably, a convex platform is arranged on the inner side of the filter grid to act as a reinforcing rib and prevent the filter grid from breaking.

[0039] Further preferably, a oil seal is arranged on the output end of the motor rotating shaft.

[0040] Further preferably, an upper water outlet is arranged on the top surface of the pump body housing outside the filter grid.

[0041] The beneficial effects of a submersible sewage pump of the present utility model are as follows:

[0042] 1. It can not only improve the convenience of installing the sealing ring, but also prevent the sealing ring from being damaged during installation, and improve the sealing performance of the pump body;

[0043] 2. The stability of the installation and use of the main body is improved through the pump body support bottom plate, and the problem of the water inlet being blocked due to the subsidence of the pump body is avoided;

[0044] 3. By changing the position of the water inlet and arranging a filtering mechanism, the water inlet can be prevented from being blocked by dirt, ensuring the normal operation of the pump body and improving the performance of the pump body.

[0045] The above are only embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A submersible sewage pump, characterized in that, Including: A machine housing, an outlet box cover, a motor, a motor front end cover, a motor rear end cover, an L-shaped sealing ring, a sealing groove, and a pump body assembly The machine housing is sleeved on the motor. The motor front end cover and the motor rear end cover are respectively arranged at both ends of the motor. The pump body assembly is connected to the motor front end cover. The outlet box cover is connected to the motor rear end cover. The sealing groove is provided at the top of the motor front end cover and the bottom of the outlet box cover. The horizontal part of the L-shaped sealing ring is arranged in the sealing groove, and the vertical part of the L-shaped sealing ring extends outward into the machine housing to form a guiding connection groove for guiding and connecting the machine housing, so that the machine housing is tightly connected to the L-shaped sealing ring to seal the connection between the machine housing and the outlet box cover and the motor front end cover. The pump body assembly includes a pump body housing, an impeller, a gasket, a pump body support bottom plate, a water inlet, a sewage discharge hole, and a filter grid. The pump body housing is in contact with the motor front end cover. The pump body support bottom plate is hermetically connected to the bottom of the pump body housing and forms a cavity for water inlet and drainage. The impeller is movably arranged in the cavity. The water inlet is provided on the top surface of the pump body housing. A plurality of the filter grids are vertically arranged around the water inlet. Filter gaps are provided between the top of the filter grid and the motor front end cover and between two adjacent filter grids to filter the sucked water. The sewage discharge hole connected to the cavity is provided on the pump body support bottom plate, and the sewage discharge hole and the water inlet are concentric structures. The rotating shaft of the motor passes through the water inlet on the motor front end cover and the pump body housing and extends into the cavity to be connected to the impeller and communicate with the cavity.

2. The submersible sewage pump according to claim 1, characterized in that, The motor is connected to the motor front end cover and the motor rear end cover by screws.

3. A submersible sewage pump according to claim 1, characterized in that, The pump body housing and the motor front end cover are fastened by screws, and the outlet box cover and the motor rear end cover are fastened by screws.

4. A submersible sewage pump according to claim 1, characterized in that, The end face of the machine housing is closely attached to the horizontal part of the L-shaped sealing ring, and the inner wall of the stainless steel machine housing is closely attached to the vertical part of the L-shaped sealing ring.

5. A submersible sewage pump according to claim 1, characterized in that, The pump body support bottom plate is connected to the pump body housing by screws.

6. A submersible sewage pump according to claim 1, characterized in that, The filter grid has a structure that is thinner at the top and thicker at the bottom and has a trapezoidal cross-section.

7. A submersible sewage pump according to claim 1, characterized in that, A gasket is provided at the connection between the pump body support bottom plate and the pump body housing.

8. A submersible sewage pump according to claim 1, characterized in that, The water inlet is provided at the central position of the top surface of the pump body housing.

9. A submersible sewage pump according to claim 1, characterized in that, An oil seal is provided at the output end of the motor rotating shaft.

10. A submersible sewage pump according to claim 1, characterized in that, An upper water outlet is provided on the top surface of the pump body housing outside the filter grid.

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