Filter assembly for sewage pump

Abstract

The utility model provides a filtering assembly for a sewage pump, and belongs to the technical field of sewage pumps. The problem that an existing filter screen is high in replacement cost is solved. The filtering assembly for the sewage pump comprises a sewage pump main body with a water inlet and a water outlet, an isolation cover cylinder connected with the sewage pump main body and used for isolating impurities is arranged on the lower end face, located at the water inlet, of the sewage pump main body, and a plurality of water inlet holes are formed in the outer periphery of the isolation cover cylinder. A filtering unit is arranged at the position, located at the water inlet, of the sewage pump body and comprises an outer cover which is of a bowl-shaped structure and connected with the sewage pump body, a plurality of rows of strip-shaped grooves which are formed in the height direction of the outer cover at intervals and used for impurities to enter and exit are formed in the peripheral wall of the outer cover, and convex ring parts are arranged on the bottom faces of the grooves of the outer cover. A plurality of notch grooves are formed in the peripheral wall of the convex ring part at intervals in the circumferential direction of the convex ring part, and filter screen plates are arranged at the positions, corresponding to the notch grooves, of the convex ring part. The utility model has the advantage that the replacement cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of sewage pump technology and relates to a filter component for sewage pumps. Background Technology

[0002] Sewage pumps are a type of centrifugal impurity pump, mainly used to transport urban sewage. However, because the transported medium contains impurities such as mud and sand, these impurities are intercepted by the filter screen during operation and then adsorbed onto the surface of the filter screen. Over time, the impurities on the filter screen surface form a layer that easily clogs the pump flow channel. Once the pump is clogged, it will not be able to work properly and may even burn out the motor, resulting in poor sewage discharge. At the same time, replacing the filter screen usually requires replacing the entire system, which is costly and does not meet the usage requirements. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a filtering component that solves these problems.

[0004] The objective of this utility model can be achieved through the following technical solution: A filter assembly for a sewage pump, comprising a sewage pump body with an inlet and an outlet, characterized in that an isolation cover connected to and used to isolate impurities is provided on the lower end face of the sewage pump body at the inlet, the isolation cover having several inlet holes on its outer periphery, a filter unit connected to and used to filter impurities is provided on the sewage pump body at the inlet, the filter unit comprising an outer cover with a bowl-shaped structure connected to the sewage pump body, the inner diameter of the outer cover gradually decreasing from top to bottom, several rows of strip grooves spaced along its height direction for impurities to enter and exit are provided on the outer peripheral wall of the outer cover, each row of strip grooves is composed of several spaced grooves spaced along the circumference of the outer cover, a convex ring portion axially protruding outward and embedded in the sewage pump body is provided on the bottom surface of the groove of the outer cover, several notch slots spaced along its circumference are provided on the outer peripheral wall of the convex ring portion, and a filter screen plate for filtering impurities is provided at the corresponding notch slot of the convex ring portion.

[0005] In the aforementioned filter assembly for a sewage pump, the lower end face of the sewage pump body located at the convex ring portion is provided with an axially inwardly recessed annular groove that facilitates the insertion of the convex ring portion. An assembly ring is provided on the upper end face of the convex ring portion, which is connected to the convex ring portion and also connected to the filter screen plate. The assembly ring facilitates the assembly of the filter screen plate.

[0006] In the aforementioned filter assembly for a sewage pump, the filter plate consists of an outer frame connected to an assembly ring and a filter screen disposed within the outer frame.

[0007] Compared with existing technologies, the filter assembly used in sewage pumps has an outer casing that allows some of the filtered impurities to flow back, while also facilitating its replacement. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the filter assembly used in a sewage pump.

[0009] Figure 2 This is a cross-sectional structural diagram of the casing used for a sewage pump.

[0010] In the diagram, 1. Sewage pump body; 2. Isolation cover; 3. Outer cover; 4. Protruding ring; 5. Filter screen; 6. Assembly ring. Detailed Implementation

[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0012] like Figure 1 , Figure 2As shown, the filter assembly for the sewage pump includes a sewage pump body 1 with an inlet and an outlet. An isolation cover 2, connected to the lower end face of the sewage pump body 1 at the inlet and used to isolate impurities, is provided. Several inlet holes are formed on the outer periphery of the isolation cover 2. A filter unit, connected to the sewage pump body 1 at the inlet and used to filter impurities, is also provided. This filter unit includes an outer cover 3 with a bowl-shaped structure connected to the sewage pump body 1. The inner diameter of the outer cover 3 gradually decreases from top to bottom. Both the inner and outer walls of the outer cover 3 are inclined. Several rows of strip grooves, spaced apart along their height direction, are formed on the outer periphery of the outer cover 3 for impurities to enter and exit. Each row of strip grooves consists of several spaced interval grooves spaced along the circumference of the outer cover 3. A protruding ring 4, axially protruding outward and embedded in the sewage pump body 1, is provided on the bottom surface of the grooves of the outer cover 3. Several spaced interval grooves, along their circumference, are formed on the outer periphery of the protruding ring 4. The circumferentially spaced notches and grooves create a U-shaped inner wall structure for the corresponding convex ring 4. A filter screen 5 for filtering impurities is located at the corresponding notch and groove on the convex ring 4. An annular groove, axially recessed and facilitating the insertion of the convex ring 4, is formed on the lower end face of the sewage pump body 1 at the convex ring 4. An assembly ring 6, connected to and also to the filter screen 5, is located on the upper end face of the convex ring 4. This assembly ring 6 facilitates the assembly of the filter screen 5. A downwardly oriented protrusion, embedded within the convex ring 4, is located on the lower end face of the assembly ring 6. After assembly, the convex ring 4 and assembly ring 6 are embedded within the sewage pump body 1. The filter screen 5 consists of an outer frame connected to the assembly ring 6 and a filter screen housed within the outer frame. After assembly, the outer frame of the filter screen 5 is embedded within the groove wall of the corresponding notch and groove in the convex ring 4. Furthermore, the filter screen 5 can be replaced based on actual damage, thus reducing replacement costs.

[0013] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0014] Although this document uses terms such as "etc." extensively, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A filter assembly for a sewage pump, comprising a sewage pump body with an inlet and an outlet, characterized in that, The sewage pump body has an isolation cover connected to the lower end face of the inlet for isolating impurities. Several inlet holes are formed on the outer periphery of the isolation cover. A filter unit connected to the inlet of the sewage pump body is also provided for filtering impurities. This filter unit includes a bowl-shaped outer cover connected to the sewage pump body, with the inner diameter of the outer cover gradually decreasing from top to bottom. Several rows of strip-shaped grooves are formed on the outer wall of the outer cover, spaced apart along its height for impurities to enter and exit. Each row of strip-shaped grooves consists of several spaced-apart grooves spaced along the circumference of the outer cover. A convex ring portion protrudes axially outward and is embedded within the sewage pump body on the bottom surface of the grooves. Several notched grooves are formed on the outer wall of the convex ring portion, spaced apart along its circumference. A filter screen for filtering impurities is provided at the corresponding notched groove location on the convex ring portion.

2. A filter assembly for a sewage pump according to claim 1, characterized in that, The sewage pump body has an annular groove that is axially recessed inward on the lower end face of the convex ring portion, which facilitates the insertion of the convex ring portion. The upper end face of the convex ring portion is provided with an assembly ring that is connected to it and also connected to the filter screen plate. The assembly ring facilitates the assembly of the filter screen plate.

3. A filter assembly for a sewage pump according to claim 2, characterized in that, The filter plate consists of an outer frame connected to the assembly ring and a filter screen disposed within the outer frame.

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