Centrifugal pump

Abstract

The utility model provides a centrifugal pump, and belongs to the technical field of water pumps. The problem that in the prior art, foreign matter enters a pump body along with liquid and accumulates in the pump body, and the pump body can be damaged is solved. The centrifugal pump comprises a pump body and a water pump motor, the water pump motor is connected with an impeller part, the pump body is provided with a water inlet part and a water outlet part, the water inlet part is provided with a filtering part used for filtering, the impeller part is composed of a mounting cylinder part and an impeller body, and the impeller body is arranged in the mounting cylinder part. A plurality of openings allowing liquid to flow through are formed in the side wall of the mounting cylinder part, the front end of the mounting cylinder part extends into the water inlet part, an annular groove allowing the filter part to be mounted is formed by the front end of the mounting cylinder part and the inner wall of the water inlet part, a positioning assembly used for positioning the filter part is arranged in the water inlet part, and the positioning assembly comprises a positioning part and a connecting spring. The utility model has the advantage that the service life of the pump body is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a centrifugal pump. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. During operation, the pump shaft drives the impeller and the liquid being transported to rotate at high speed. The liquid undergoes centrifugal motion, being thrown towards the outer edge of the impeller and flowing through the flow channel of the volute casing and the pump outlet into the transport pipeline. However, depending on the actual operating environment, the transported liquid often contains impurities or foreign objects. If these foreign objects enter the pump body with the liquid and accumulate inside, they will damage the pump, increase the probability of pump failure, and also reduce the pump's service life. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a centrifugal pump that improves the service life of the pump body.

[0004] The objective of this utility model can be achieved through the following technical solution: A centrifugal pump, comprising a pump body and a pump motor disposed at the rear end of the pump body, wherein the motor shaft of the pump motor passes through the pump body and is connected to an impeller assembly, characterized in that the pump body is provided with an inlet for liquid inflow and an outlet for liquid outflow, the inlet is provided with a filter element for filtration, the impeller assembly is composed of a mounting cylinder and an impeller body, the impeller body is disposed within the mounting cylinder, the side wall of the mounting cylinder is provided with a plurality of openings for liquid flow, and the front end of the mounting cylinder extends into... The water inlet section forms an annular groove with its inner wall for installing the filter element. A positioning assembly for positioning the filter element is provided within the water inlet section. The positioning assembly includes a positioning element and a connecting spring. An installation groove for installing the positioning assembly is provided on the water inlet section. A positioning hole matching one end of the positioning element is provided on the outer wall of the filter element. The positioning element, located within the installation groove, has a sliding part that can slide within the installation groove. The connecting spring is located between the bottom wall of the installation groove and the sliding part. The positioning element positions the filter element at the water inlet section under the action of the connecting spring.

[0005] In the centrifugal pump described above, the filter element is configured with a double-layer filter structure, and the size of the impurities filtered at the front end of the filter element is larger than the size of the impurities filtered at the rear end of the filter element.

[0006] In the centrifugal pump described above, there are two positioning components, which are respectively located on the left and right sides of the water inlet.

[0007] In the centrifugal pump described above, the mounting cylinder is fixedly installed on the pump body by fixing bolts.

[0008] Compared with existing technologies, this centrifugal pump has a filter element installed at the water inlet, and the filter element is positioned by a positioning component, which makes it easy for operators to disassemble and replace the filter element. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0010] Figure 2 This is a partial structural schematic diagram of the present invention.

[0011] In the diagram, 1 is the pump body; 2 is the impeller; 3 is the inlet; 4 is the outlet; 5 is the filter; 6 is the mounting cylinder; 7 is the impeller body; 8 is the positioning assembly; 9 is the positioning element; 10 is the connecting spring; 11 is the mounting groove; and 12 is the positioning hole. Detailed Implementation

[0012] 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.

[0013] like Figure 1 , Figure 2 As shown, this centrifugal pump includes a pump body 1 and a pump motor located at the rear end of the pump body 1. The motor shaft of the pump motor passes through the pump body 1 and is connected to an impeller 2. The pump body 1 is provided with an inlet 3 for liquid inflow and an outlet 4 for liquid outflow. The inlet 3 is provided with a filter element 5 for filtration. The impeller 2 consists of a mounting cylinder 6 and an impeller body 7. The impeller body 7 is located inside the mounting cylinder 6. The side wall of the mounting cylinder 6 has several openings for liquid flow. The front end of the mounting cylinder 6 extends into the inlet 3 and forms a connection with the inner wall of the inlet 3 to accommodate the filter element 5. The inlet section 3 is equipped with a positioning component 8 for positioning the filter element 5. The positioning component 8 includes a positioning element 9 and a connecting spring 10. The inlet section 3 has an installation groove 11 for mounting the positioning component 8. The outer wall of the filter element 5 has a positioning hole 12 that matches one end of the positioning element 9. The positioning element 9 is located in the installation groove 11 and has a sliding part that can slide within the installation groove 11. The connecting spring 10 is located between the bottom wall of the installation groove 11 and the sliding part. The positioning element 9 positions the filter element 5 at the inlet section 3 under the action of the connecting spring 10.

[0014] To elaborate further, the liquid flows in from the water inlet 3 of the pump body 1, and is filtered through the double-layer filter screen of the filter element 5 in sequence. It then flows in from the water inlet channel of the mounting cylinder 6, flows out from the opening of the mounting cylinder 6, and finally flows out from the water outlet 4 of the pump body 1.

[0015] To further explain the installation of filter element 5, by pulling the positioning element 9, it is retracted into the mounting groove 11, and the connecting spring 10 is compressed, thus installing filter element 5 in the annular groove. Then, the positioning element 9 is released, causing the connecting spring 10 to spring back, and one end of the positioning element 9 extends into the positioning hole 12 of filter element 5, thereby fixing filter element 5.

[0016] To elaborate further, the filter element 5 is configured with a double-layer filtration structure, wherein the size of the impurities filtered at the front end of the filter element 5 is larger than the size of the impurities filtered at the rear end of the filter element 5.

[0017] To elaborate further, there are two positioning components 8, which are respectively located on the left and right sides of the water inlet 3.

[0018] To elaborate further, the mounting cylinder 6 is fixedly installed on the pump body 1 using fixing bolts.

[0019] 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.

[0020] Although this document frequently uses terms such as pump body 1, impeller 2, inlet 3, outlet 4, filter 5, mounting cylinder 6, impeller body 7, positioning assembly 8, positioning element 9, connecting spring 10, mounting groove 11, and positioning hole 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A centrifugal pump, comprising a pump body (1) and a pump motor disposed at the rear end of the pump body (1), wherein the motor shaft of the pump motor passes through the pump body (1) and is connected to an impeller component (2), characterized in that, The pump body (1) is provided with an inlet (3) for liquid to flow in and an outlet (4) for liquid to flow out. The inlet (3) is provided with a filter element (5) for filtration. The impeller is composed of a mounting cylinder (6) and an impeller body (7). The impeller body (7) is located inside the mounting cylinder (6). The side wall of the mounting cylinder (6) is provided with several openings for liquid to flow through. The front end of the mounting cylinder (6) extends into the inlet (3) and forms an annular groove with the inner wall of the inlet (3) for the filter element (5) to be installed. The inlet (3) is provided with a positioning device for positioning the filter element (5). The positioning component (8) includes a positioning element (9) and a connecting spring (10). The water inlet (3) is provided with an installation groove (11) for the positioning component (8) to be installed. The outer wall of the filter element (5) is provided with a positioning hole (12) that matches one end of the positioning element (9). The positioning element (9) is located in the installation groove (11) and is provided with a sliding part that can slide in the installation groove (11). The connecting spring (10) is located between the bottom wall of the installation groove (11) and the sliding part. The positioning element (9) positions the filter element (5) at the water inlet (3) under the action of the connecting spring (10).

2. A centrifugal pump according to claim 1, characterized in that, The filter element (5) is a double-layer filter structure, and the size of the impurities filtered at the front end of the filter element (5) is larger than the size of the impurities filtered at the rear end of the filter element (5).

3. A centrifugal pump according to claim 1, characterized in that, The number of the positioning components (8) is two, and they are respectively located on the left and right sides of the water inlet (3).

4. A centrifugal pump according to claim 1, characterized in that, The mounting cylinder (6) is fixedly installed on the pump body (1) by fixing bolts.

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