Shell assembly for pump and sewage pump

Abstract

The utility model provides a pump assembly and a sewage pump, the sewage pump comprises the pump assembly, the pump assembly comprises an upper shell assembly, a base, a motor, an impeller and a supporting seat, the motor is arranged in the upper shell assembly, the upper end of the motor is connected with the upper shell assembly, and the base is connected with the lower end of the upper shell assembly; the supporting seat sleeves the lower end of the motor, and the lower end of the supporting seat is attached to the base; a pressure cavity is formed in the base, and the impeller is arranged in the pressure cavity; a mounting opening is formed in the supporting seat; a rotating shaft of the motor penetrates through the mounting opening and is connected with the impeller; a water inlet and a water outlet are formed in the base and are communicated with the pressure cavity. When the sewage pump is assembled, the sewage pump can be installed in the same direction, the filter shell, the upper shell assembly and the base are easy to install, the base and the supporting base are easy to install, additional connecting pieces are not needed, operation is easy, installation is convenient, and the installation time and cost can be effectively saved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage pumps, and in particular to a pump housing assembly and a sewage pump. Background Art

[0002] Sewage pumps are mainly used to transport sewage; most of the existing sewage pumps include an upper shell and a lower shell, the upper shell is sleeved on the upper end of the motor, and a support seat is provided on the lower shell to support the lower end of the motor, thereby supporting the upper and lower ends of the motor to fix the motor.

[0003] However, when installing such a connection structure, it is necessary to consider the connection of the upper shell and the lower shell to the motor, and then connect the upper shell and the lower shell, which makes the installation process of the sewage pump more cumbersome, complicated and time-consuming; and in the axial direction, the connection between the upper and lower shells is located in the middle of the motor. In order to ensure the connection stability between the upper shell and the lower shell, the connection structure between the upper shell and the lower shell is also more complicated. Utility Model Content

[0004] In view of this, in order to solve the technical problem that the connection structure of the motor in the sewage pump in the above-mentioned prior art is relatively complicated, the present application provides a pump housing assembly and a sewage pump, wherein the connection structure of the housing assembly and the connection structure of the motor are relatively simple and easy to install.

[0005] First aspect

[0006] The present application provides a housing assembly for a pump, the housing assembly comprising an upper housing, a base and a filter shell, the base being connected to the lower end of the upper housing;

[0007] Wherein, a step groove is provided on the outer side of the base, the step groove is recessed toward the lower end of the base, the outer diameter of the upper shell is larger than the inner diameter of the step groove, a mounting groove is formed between the step groove and the upper shell, and the opening of the mounting groove is in the radial direction of the shell assembly;

[0008] The filter shell is sleeved on the outside of the base, and an inwardly bent portion is provided on the upper end of the filter shell. The bent portion is at least partially located in the mounting groove to achieve connection between the filter shell and the upper shell and the base.

[0009] Preferably, the inner diameter of the bent portion is smaller than the outer diameter of the upper shell.

[0010] The pump housing assembly of the present application is provided with a step groove on the base. When the upper housing is connected to the base, the upper housing and the step groove form a radially opening mounting groove. The inwardly bent portion of the filter shell is at least partially located in the mounting groove, thereby realizing the installation connection of the filter shell. This connection does not require the use of additional connecting components, thereby saving the installation procedure, and has a simple structure and convenient installation.

[0011] Second aspect

[0012] The present application provides a sewage pump, comprising an upper shell assembly, a base, a motor, an impeller and a support seat, wherein the motor is arranged in the upper shell assembly, the upper end of the motor is connected to the upper shell assembly, and the base is connected to the lower end of the upper shell assembly;

[0013] Wherein, the support seat is sleeved on the lower end of the motor, and the lower end of the support seat is in contact with the base;

[0014] A pressure chamber is provided on the base, and the impeller is arranged in the pressure chamber;

[0015] The support seat is provided with a mounting opening, and the rotating shaft of the motor passes through the mounting opening and is connected to the impeller;

[0016] The base is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the pressure chamber.

[0017] Compared with the prior art, the sewage pump of the present application provides a support seat between the base and the upper shell assembly, so that the support seat is sleeved on the lower end of the motor to support the lower end of the motor, thereby supporting the upper and lower ends of the motor, and the support seat is located at the connection between the upper shell assembly and the base, that is, the entire motor is basically located in the upper shell assembly. When the sewage pump is assembled, the upper end of the motor is first connected to the upper shell assembly, and then the support seat is sleeved on the lower end of the motor in the axial direction, and then the base is inserted in the axial direction so that the lower end of the support seat fits with the base, and then the base is fixed to the upper shell assembly to achieve the fixation of the motor; the structure of the sewage pump of the present application enables the sewage pump to be installed in the same direction during installation, and the operation is simple and the installation is convenient, which can effectively save installation time.

[0018] Preferably, the sewage pump comprises the pump casing assembly described in any one of the embodiments provided in the first aspect.

[0019] Preferably, a support platform is provided in the pressure chamber, and the support platform extends inwardly in a radial direction to support the support seat.

[0020] Preferably, the water outlet is arranged on the side wall of the base, and the water inlet is arranged at the bottom end of the base;

[0021] The support platform includes a starting end, and the starting end is arranged on the side of the water outlet along the circumferential direction;

[0022] The support platform takes the starting end as a starting point, and the radial width of the support platform gradually decreases along the circumferential direction.

[0023] Preferably, the decreasing direction of the radial width of the support platform is the same as the rotation direction of the impeller.

[0024] Preferably, a support portion is provided on the support seat, the support portion extends along the axial direction, and the upper end of the support portion is in contact with the bottom of the motor.

[0025] Preferably, a mounting platform is provided on the outside of the base, and the mounting platform extends outwardly in a radial direction;

[0026] The lower end of the upper shell assembly is bent outwardly in the radial direction to form an extension portion, and the lower end of the extension portion is in contact with the upper end of the mounting platform.

[0027] Preferably, the support seat is provided with a water outlet, and the water outlet passes through the support seat along the axial direction.

[0028] A sewage pump of the present application has at least the following technical effects:

[0029] 1. By setting a support base to support the lower end of the motor, the bottom of the base can be directly placed on the support platform of the support base, thereby simplifying the installation of the motor, making the sewage pump more convenient to install and saving installation time;

[0030] 2. The radial width of the support platform decreases along the circumferential direction, and the decreasing direction is the same as the rotation direction of the impeller, so that the support platform can guide the fluid, so that the fluid can flow to the water outlet more quickly and stably under the action of the impeller and the support platform;

[0031] 3. By providing support legs on the base, the support legs can raise the height of the water inlet, and gaps are provided between the support legs for fluid to flow through, so that sewage can flow smoothly into the water inlet;

[0032] 4. By setting up a filter shell, larger impurities can be blocked outside to prevent them from entering the sewage pump and blocking the water inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of a sewage pump provided in one embodiment of the present application;

[0034] Figure 2 It is a schematic cross-sectional structure diagram of a sewage pump provided in one embodiment of the present application;

[0035] Figure 3 yes Figure 2 An enlarged schematic diagram of a local A;

[0036] Figure 4 yes Figure 3 An enlarged schematic diagram of a local B;

[0037] Figure 5 It is a schematic diagram of the three-dimensional structure of a base provided in one embodiment of the present application;

[0038] Figure 6 is a schematic diagram of a three-dimensional cross-sectional structure of a base provided in one embodiment of the present application;

[0039] Figure 7 It is a schematic diagram of the three-dimensional structure of a support base provided in one embodiment of the present application;

[0040] Figure 8 It is a schematic diagram of a three-dimensional cross-sectional structure of a support base provided in one embodiment of the present application.

[0041] Reference numerals: 1. Sewage pump;

[0042] 11. Upper shell assembly; 12. Base; 13. Motor; 14. Support seat; 15. Impeller; 16. Filter shell; 17. Bottom plate;

[0043] 111, upper housing; 112, upper connecting seat; 113, mounting groove; 1111, extension portion;

[0044] 121, pressure chamber; 122, support platform; 123, water outlet; 124, water inlet; 125, mounting platform; 126, support leg; 127, outer retaining ring;

[0045] 141, support part; 142, limiting part; 143, water outlet; 144, baffle; 145, installation port; 146, limiting rib;

[0046] 161. filter hole; 162. bending portion. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0048] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0049] Those skilled in the art should understand that, in the disclosure of the present application, the orientation or positional relationship indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0050] The present application is further described in detail below in conjunction with the accompanying drawings. Figures 1 to 8 illustrate.

[0051] First aspect

[0052] The present application provides a pump housing assembly, which is used in a sewage pump, such as Figures 1 to 6 As shown, the housing assembly is sleeved on the outside of the motor, impeller and other components. The housing assembly includes an upper housing 111, a base 12 and a filter shell 16. The base 12 is connected to the lower end of the upper housing 111. Figure 6 As shown, the base 12 is provided with a threaded hole, and similarly, the upper shell 111 is provided with a threaded hole, so that the base 12 and the upper shell 111 are connected by a threaded connection method such as bolts or screws; Figure 3 , Figure 4 As shown, a step groove is provided at the outer end of the side wall of the base 12, the step groove is recessed toward the lower end of the base 12, the groove surface of the step groove is lower than the upper end surface of the base 12, the step groove is annular, the inner ring diameter of the step groove is larger than the inner diameter of the base 12, the outer diameter of the upper shell 111 is larger than the inner ring diameter of the step groove, when the upper shell 111 is connected to the base 12, a mounting groove 113 is formed between the step groove and the upper shell 111, the axial direction of the mounting groove 113 is limited by the upper shell 111 and the base 12 respectively, and the opening of the mounting groove 113 is radially In the direction, the opening of the mounting groove 113 faces; the filter shell 16 is sleeved on the outside of the base 12, and the upper end of the filter shell 16 is provided with a bending portion 162 bent inwardly, and the bending portion 162 extends in the radial direction, and the bending portion 162 is at least partially located in the mounting groove 113, so that the filter shell 16 is clamped between the upper shell 111 and the base 12. Without using other connecting components, the connection between the filter shell 16 and the upper shell 111 and the base 12 is realized, the structure is simple, and the installation is convenient and fast, which can effectively reduce the cost.

[0053] Further, such as Figure 4 As shown, the axial length of the mounting groove 113 is smaller than the thickness of the bent portion 162, thereby making the mounting groove 113 more tightly clamped to the bent portion 162, making it difficult for the filter shell 16 to move in the mounting groove 113, thereby enhancing the connection stability of the filter shell 16 with the base 12 and the upper shell 111.

[0054] Further, such as Figure 4 As shown, the inner diameter of the bending portion 162 is smaller than the outer diameter of the upper shell 111, so that when the bending portion 162 of the filter shell 16 is at least partially located in the mounting groove 113, it can be ensured that the lower end of the upper shell 111 can fit with the bending portion 162, so that the upper shell 111 can limit the filter shell 16 to enhance the connection stability.

[0055] In this embodiment, it should be noted that the threaded hole for threaded connection between the upper shell 111 and the base 12 is arranged on the inner side of the step groove, that is, the threaded hole is closer to the center of the axis, and the threaded hole and the step groove have a distance in the radial direction so that the two are staggered to avoid interference of the threaded connection with the installation of the installation groove 113 and the filter shell 16.

[0056] Second aspect

[0057] The present application provides a sewage pump that can be used to extract and transport sewage. The sewage pump 1 of the present application includes any embodiment of the pump housing assembly provided in the first aspect.

[0058] like Figures 1 to 2As shown, the sewage pump 1 includes a motor 13, an impeller 15, an upper shell assembly 11, a base 12 and a support base 14. The upper shell assembly 11 includes an upper connecting seat 112 and an upper shell 111. The upper shell 111 is cylindrical. The upper connecting seat 112 is connected to the top of the upper shell 111. The upper connecting seat 112 is provided with a mounting cavity. The motor 13 is arranged in the upper shell 111. The upper connecting seat 112 is sleeved on the outer side of the upper end of the motor 13, thereby realizing the connection with the upper end of the motor 13; the lower end of the upper shell 111 is connected to the base 12, and the upper side wall of the base 12 is provided with a water outlet 123 and a water inlet 124 is arranged at the bottom of the base 12 along the axial direction, and the height of the water outlet 123 is greater than the height of the water inlet 124; the support seat 14 is sleeved on the bottom of the motor 13, and the bottom and side wall of the motor 13 are in contact with the support seat 14, and the lower end of the support seat 14 is in contact with the base 12, so that after the support seat 14 is sleeved on the lower end of the motor 13, the base 12 gives the support seat 14 an upward support effect, and the support seat 14 gives the motor 13 an upward support effect, so that under the joint action of the support seat 14 and the upper connecting seat 112, the upper and lower ends of the motor 13 are limited and fixed, so that The motor 13 is stably arranged in the sewage pump 1; the support seat 14 is provided with an installation opening 145 through which the rotating shaft of the power supply motor 13 passes, and the installation opening 145 penetrates in the axial direction; a pressure chamber 121 for placing the impeller 15 is provided in the base 12, and the impeller 15 rotates in the pressure chamber 121 to form a negative pressure area, and the water outlet 123 and the water inlet 124 are both connected to the pressure chamber 121, so that the fluid can be sucked into the pressure chamber 121 from the water inlet 124 and then discharged from the water outlet 123; the lower end of the base 12 is provided with a support leg 126, and the support leg 126 has at least two The support legs 126 are arranged at equal intervals, and the support legs 126 raise the height of the water inlet 124 to prevent debris in the sewage from clogging the water inlet 124. The intervals between the support legs 126 can allow fluid to pass through; in particular, in this embodiment, the support seat 14 and the base 12 are abutted, which saves a lot of connection procedures during installation. It is only necessary to fit the support seat 14 with the base 12 and connect the base 12 with the upper shell 111, so that the motor 13 can be fixed, which can effectively save the installation procedure and installation time, and greatly improve the production efficiency of the sewage pump 1.

[0059] like Figures 2 to 3 , Figures 7 and 8 As shown, the support seat 14 is provided with a support portion 141, which extends and protrudes along the axial direction, thereby supporting the lower end surface of the motor 13. In this embodiment, as shown in FIG. Figure 3As shown, the support portion 141 is arranged above the mounting opening 145. On the one hand, it plays a role in limiting and guiding the rotating shaft of the motor 13. On the other hand, it can support the motor 13 closer to the center direction, and the support for the motor 13 is more stable. The support seat 14 is also provided with a limiting portion 142. There is at least one limiting portion 142, and the limiting portion 142 is annular. Figure 3 , Figure 8 As shown, the limiting portion 142 extends and protrudes along the axial direction, and the limiting portion 142 is in contact with the outer side of the motor 13. The limiting portion 142 limits the radial displacement of the motor 13, and cooperates with the supporting portion 141 to limit the axial and radial directions of the motor 13, so that the motor 13 can be stably connected to the upper shell 111; in this embodiment, when there is one limiting portion 142, it can be set to a circular ring shape or a ring shape with an opening; when the number of limiting portions 142 is at least two, the limiting portions 142 are concentrically arranged and have the same curvature, and the limiting portions 142 are equidistantly arranged to facilitate more uniform and stable support for the motor 13.

[0060] like Figure 7 , Figure 8 As shown, a water outlet 143 is provided on the support seat 14, and the water outlet 143 axially penetrates the support seat 14. The water outlet 143 is connected to the pressure chamber 121 where the impeller 15 is located, so that the fluid can flow to the top of the support seat 14 through the water outlet 143 and contact the side wall of the motor 13. There is a gap between the side wall of the motor 13 and the upper shell 111. The fluid flows in the gap, thereby playing a liquid cooling role on the motor 13, so as to cool the motor 13 when the sewage pump 1 is running, so as to ensure that the working efficiency of the sewage pump 1 is relatively stable. There is at least one water outlet 143, and the water outlet 123 is arranged on the outside of the limiting portion 142. The position of the water outlet 123 corresponds to the setting position of the limiting portion 142, that is, the water outlet 123 and the limiting portion 142 are in the same radial direction, and the circumferential length of the water outlet 123 can be set to be less than or equal to the circumferential length of the limiting portion 142. The number of water outlets 123 corresponds to the number of limiting portions 142; when the number of limiting portions 142 is one, the number and position of the water outlets 123 can be reasonably set according to needs.

[0061] like Figure 8 As shown, the outer peripheral wall of the support seat 14 is provided with a concentrically arranged annular baffle 144, which extends in the axial direction. The setting height of the limiting portion 142 is greater than the height of the baffle 144, which can increase the contact area between the limiting portion 142 and the motor 13 and enhance the connection stability of the support seat 14 to the motor 13; further, the height of the baffle 144 corresponding to the water outlet 123 is relatively low, which can enable the fluid to quickly diffuse to the upper space after flowing in from the water outlet 143, thereby accelerating the liquid cooling effect on the motor 13.

[0062] Further, such as Figure 4As shown, a limiting rib 146 is provided on the inner wall of the limiting portion 142. The limiting rib 146 is arranged along the axial direction and protrudes inwardly along the radial direction. Limiting ribs 146 are provided at both ends of each limiting portion 142. The limiting rib 146 fits with the motor 13 to support the motor 13. On the one hand, the contact area between the limiting portion 142 and the motor 13 is reduced, which is convenient for the installation and disassembly of the support seat 14 and the motor 13; on the other hand, the fluid can flow to the lower end of the motor 13 through the gap between the limiting portion 142 and the motor 13, which has a liquid cooling effect on the lower end of the motor 13.

[0063] In an optional embodiment of the present application, the outer diameter of the support seat 14 is larger than the inner diameter of the base 12. During installation, the lower end surface of the support seat 14 directly abuts against the upper end surface of the base 12, and the upper end surface of the base 12 provides the support seat 14 with a support platform 122 surface, thereby achieving support of the support seat 14 by the base 12.

[0064] In an optional embodiment of the present application, Figures 2 to 6 As shown, a support platform 122 is provided on the base 12, and the outer diameter of the support platform 122 is smaller than the outer diameter of the base 12, that is, the support platform 122 is arranged in the pressure chamber 121 of the base 12, and the support platform 122 extends inwardly along the radial direction. The outer diameter of the support seat 14 is smaller than the outer diameter of the support platform 122 but larger than the inner diameter of the support platform 122, so that the support platform 122 can support the bottom of the support seat 14; in this embodiment, as Figure 5 , Figure 6 As shown, an outer retaining ring 127 is also provided on the base 12. The outer retaining ring 127 is arranged on the outside of the support platform 122. The outer retaining ring 127 extends in the axial direction. When the support seat 14 is in contact with the support platform 122 of the base 12, the outer retaining ring 127 is located between the upper shell 111 and the support seat 14, and plays a role of limiting and supporting the periphery of the support seat 14, so that the support seat 14 can be stably connected to the base 12, and the auxiliary support seat 14 can provide relatively stable support for the motor 13.

[0065] Further, such as Figure 5 As shown, the support platform 122 includes a starting end, which is arranged on the side of the water outlet 123. The radial width of the support platform 122 gradually decreases along the same circumferential direction, and the radial thickness of the starting end of the support platform 122 is greater than the radial thickness of the end, so that in the space of the pressure chamber 121, the space where the fluid can flow is spiral along the circumferential direction, which has a guiding effect on the flow of the fluid and can assist the fluid to accelerate and stably flow to the water outlet 123; correspondingly, the circumferential decreasing direction of the radial width of the support platform 122 is the same as the rotation direction of the impeller 15, so that the direction of the fluid thrown out by the impeller 15 is the same as the guiding direction of the support platform 122, thereby having a better guiding effect on the flow rate and flow direction of the fluid.

[0066] As 5 to Figure 6 As shown, a mounting platform 125 is provided on the outer wall of the upper end of the base 12. The mounting platform 125 protrudes radially outward. The lower end of the upper shell 111 is bent in the radial direction and extends outward to form an extension portion 1111. The extension portion 1111 fits with the mounting platform 125. The radial width of the mounting platform 125 is greater than the radial width of the extension portion 1111 to ensure full support for the extension portion 1111. After the extension portion 1111 fits with the mounting platform 125, bolts can be provided to fix the extension portion 1111 and the mounting platform 125 in the axial direction, so that the base 12 is fixedly connected to the upper shell 111. Compared with the structure of the sewage pump 1 in the prior art, in the present application, the base 12 and the support seat 14 do not need to be fixed with additional connecting parts, so as to realize the support of the lower end of the motor 13. The overall installation is relatively simple, convenient and fast. Figure 3 , Figure 4 As shown, the mounting groove 113 is located on the mounting platform 125 , and the bent portion 162 of the filter housing 16 is located between the mounting platform 125 and the extending portion 1111 .

[0067] Further, such as Figure 1 As shown, the filter shell 16 is provided with a filter hole 161, and the filter hole 161 penetrates the filter shell 16 in the radial direction. The filter hole 161 corresponds to the spacing between the support legs 126, so that the fluid can enter the base 12 from the filter hole 161. The filter hole 161 can be of any shape. In the present application, the filter hole 161 includes at least two filter holes with different areas, including a small rectangular filter hole and a large filter hole close to a square, so as to form a wider filtration and increase the filtering effect; correspondingly, the filter shell 16 is provided with a hole corresponding to the water outlet 123; as shown Figure 2 As shown, a bottom plate 17 is provided at the bottom of the base 12, and the bottom plate 17 is connected to the lower end of the supporting leg 126, thereby closing the bottom of the base 12 and increasing the area of ​​the bottom of the base 12. This can make the sewage pump 1 more stable when placed on the base surface and effectively prevent sewage impurities at the bottom from entering the water inlet 124 without being filtered.

[0068] During installation, first connect the upper shell assembly 11 to the upper end of the motor 13; then insert the support seat 14 along the axial direction so that the rotating shaft of the motor 13 passes through the mounting opening 145 of the support seat 14, and the limiting portion 142 and the supporting portion 141 of the support seat 14 are both in contact with the motor 13, which limits the side wall and the lower end of the motor 13; then connect the impeller 15 to the rotating shaft, and then insert the base 12 along the axial direction so that the outer retaining ring 127 of the base 12 is located between the support seat 14 and the upper shell 111, the lower end of the support seat 14 is in contact with the support platform 122 of the base 12, the extension portion 1111 of the upper shell 111 is in contact with the mounting platform 125 of the base 12, and then the extension portion 1111 of the upper shell 111 is fixed by bolts or screws. The part 1111 is fixed to the mounting platform 125; finally, the bottom plate 17 and the filter shell 16 are installed, and the bent portion 162 of the filter shell 16 is inserted into the mounting groove 113 to realize the installation of the filter shell 16, and then the installation of the sewage pump 1 is completed; the sewage pump 1 of the present application has a simple structure and can be installed in the same direction, with simple operation and convenient installation, which can effectively save installation time; especially the structure of the support seat 14 is coordinated with the structure of the base 12, so that the installation of the support structure at the lower end of the motor 13 is relatively simple, and there is no need to use additional connecting parts to fix the support seat 14 and the base 12, which simplifies the installation and disassembly procedures, saves installation and disassembly time, reduces production time, and reduces production costs.

[0069] It should be noted that the various embodiments of the present application can be arbitrarily combined into a new embodiment if the solutions do not conflict and the technical solutions can coexist.

[0070] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A pump housing assembly, characterized in that: The housing assembly comprises an upper housing (111), a base (12) and a filter housing (16), wherein the base (12) is connected to the lower end of the upper housing (111); A step groove is provided on the outer side of the base (12), the step groove is recessed toward the lower end of the base (12), the outer diameter of the upper shell (111) is larger than the inner diameter of the step groove, a mounting groove (113) is formed between the step groove and the upper shell (111), and the opening of the mounting groove (113) is in the radial direction of the shell assembly; The filter shell (16) is sleeved on the outside of the base (12); the upper end of the filter shell (16) is provided with a bent portion (162) bent inwardly; the bent portion (162) is at least partially located in the mounting groove (113) to achieve connection between the filter shell (16), the upper shell (111) and the base (12).

2. The pump housing assembly according to claim 1, characterized in that: The inner diameter of the bent portion (162) is smaller than the outer diameter of the upper shell (111).

3. A sewage pump, characterized in that: It comprises an upper shell component (11), a base (12), a motor (13), an impeller (15) and a support base (14), wherein the motor (13) is arranged in the upper shell component (11), the upper end of the motor (13) is connected to the upper shell component (11), and the base (12) is connected to the lower end of the upper shell component (11); Wherein, the support seat (14) is sleeved on the lower end of the motor (13), and the lower end of the support seat (14) is in contact with the base (12); The base (12) is provided with a pressure chamber (121), and the impeller (15) is arranged in the pressure chamber (121); The support seat (14) is provided with a mounting opening (145), and the rotating shaft of the motor (13) passes through the mounting opening (145) and is connected to the impeller (15); The base (12) is provided with a water inlet (124) and a water outlet (123), and the water inlet (124) and the water outlet (123) are in communication with the pressure chamber (121).

4. The sewage pump according to claim 3, characterized in that: The sewage pump (1) comprises a pump housing assembly according to any one of claims 1 to 2.

5. The sewage pump according to claim 3 or 4, characterized in that: A support platform (122) is provided in the pressure chamber (121), and the support platform (122) extends inwardly in a radial direction to support the support seat (14).

6. The sewage pump according to claim 5, characterized in that: The water outlet (123) is arranged on the side wall of the base (12), and the water inlet (124) is arranged at the bottom end of the base (12); The support platform (122) comprises a starting end, and the starting end is arranged on the side of the water outlet (123) along the circumferential direction; The support platform (122) takes the starting end as a starting point, and the radial width of the support platform (122) gradually decreases along the circumferential direction.

7. The sewage pump according to claim 5, characterized in that: The radial width of the support platform (122) decreases in the same direction as the rotation direction of the impeller (15).

8. The sewage pump according to claim 3 or 4, characterized in that: The support seat (14) is provided with a support portion (141), the support portion (141) extends in an axial direction, and the upper end of the support portion (141) is in contact with the bottom of the motor (13).

9. The sewage pump according to claim 3 or 4, characterized in that: A mounting platform (125) is provided on the outside of the base (12), and the mounting platform (125) extends outward in a radial direction; The lower end of the upper shell component (11) is bent outwardly in a radial direction to form an extension portion (1111), and the lower end of the extension portion (1111) is in contact with the upper end of the mounting platform (125).

10. The sewage pump according to claim 3 or 4, characterized in that: The support seat (14) is provided with a water outlet (143), and the water outlet (143) penetrates the support seat (14) along the axial direction.

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