Self-cleaning device for impeller of slurry pump

Abstract

The utility model relates to a slurry pump impeller self-cleaning device which comprises a sleeve installed on the inner side of a suction inlet of a slurry pump, a water outlet for guiding fresh water flow into the slurry pump is formed in the inner side of the sleeve, one end of the water outlet is communicated with a water inlet for the fresh water flow to enter, and blades arranged in a threaded mode are arranged on the inner side of the water outlet. According to the utility model, the threaded blades are integrally designed in the sleeve, so that the path of the fresh water flow entering the slurry pump is prolonged, and the fresh water flow is accelerated, so that larger impact force can be generated when the fresh water flow flows into the slurry pump; and in cooperation with directional guiding of the water outlet, fresh water flow can efficiently clean the impeller of the slurry pump, and it is prevented that fine ash in mixed water is precipitated on the impeller of the slurry pump, and starting and running of equipment are affected.

Description

Technical Field

[0001] This utility model relates to the field of slurry pump technology, specifically to a slurry pump impeller self-cleaning device. Background Technology

[0002] A slurry pump is a type of pump used to transport liquids containing solid particles. The working principle of a slurry pump is mainly based on the action of centrifugal force. When the pump starts, the impeller rotates at high speed, and the liquid and solid particles are drawn into the center of the impeller. Then, under the push of the impeller, they are thrown to the surroundings along the channels between the blades. The liquid thus gains energy, the pressure increases, and it is discharged from the pump outlet. At the same time, a low-pressure zone is formed in the center of the impeller, and new liquid and solid particles are continuously drawn in, forming a continuous conveying process. It is widely used in industries such as mining, metallurgy, and power to handle various high-concentration and highly abrasive slurries.

[0003] The ash and slag discharged from the gasifier flow into the settling tank. In the settling tank, the flow rate of the ash and slag water slows down, and the ash and slag sink to the bottom of the tank due to gravity. The water overflows into the clarification tank, where finer ash and slag are separated from the water. The fine ash and slag remain in the clarification tank, while the water flows into the clear water tank. The clear water in the clear water tank is pumped into the slag flushing pipe by the slag slurry pump. The pipe is laid along the slag ditch, and jet nozzles are installed at the starting point, slag drop point, and bend of the slag ditch. The high-pressure water sprayed from the jet nozzles flushes the slag in the slag ditch into the settling tank to prevent siltation.

[0004] The ash from the gasification grate enters the ash pool. Large pieces of ash are removed, while fine powder ash mixes with water and is difficult to settle. The slurry pump inlet is equipped with a bottom valve, which has a check valve function. After the ash-slag mixture enters the slurry pump, the fine ash in the mixture will settle onto the pipes and pump impeller, affecting the start-up and operation of the equipment and causing the slurry pump to fail to start normally. Utility Model Content

[0005] Based on the above description, this utility model provides a slurry pump impeller self-cleaning device to solve the problem that after the ash-slag mixed water enters the slurry pump, the fine ash in the mixed water will settle onto the pipeline and pump impeller, affecting the start-up and operation of the equipment.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A slurry pump impeller self-cleaning device includes a sleeve installed inside the suction port of the slurry pump. The inner side of the sleeve is provided with a guide for fresh water to enter the outlet of the slurry pump. One end of the outlet is connected to the inlet for fresh water to enter. The inner side of the outlet is provided with threaded blades. The blades enhance the flow of fresh water to flush and clean the impeller of the slurry pump.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the sleeve is inserted into the inside of the suction port, and one end of the sleeve is integrally formed with an annular fixed end, which fits against one end of the suction port. The inner side of the sleeve away from the fixed end is tapered and faces the center of the sleeve.

[0009] Furthermore, the outer side of the fixed end is integrally formed with an extension end, which is arc-shaped and extends to the outer side of the suction port.

[0010] Furthermore, an annular inner cavity is formed on the inner side of the fixed end, and the water inlet is formed on the inner side of the inner cavity and faces the extension end.

[0011] Furthermore, the water inlet is arc-shaped and extends through the extension end, and a connecting pipe is installed on the inner side of the water inlet away from the sleeve.

[0012] Furthermore, the water outlet is located inside the sleeve and extends through both ends of the sleeve. The water outlet is annular and connects to the inner cavity.

[0013] Furthermore, the blades are fixedly connected to the inner wall of the outlet on the side away from the center of the sleeve. The blades are spiral-shaped and distributed in a ring at equal intervals with the center of the outlet as the center point.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] This invention extends the path of fresh water into the slurry pump by integrating threaded blades within the sleeve, and accelerates the fresh water flow, allowing it to generate greater impact force as it enters the pump. Combined with the directional guidance of the outlet, the fresh water can efficiently clean the impeller of the slurry pump, preventing fine ash in the mixed water from settling on the impeller and affecting the operation of the equipment. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a slurry pump impeller self-cleaning device provided in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the fixed end in an embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the sleeve in an embodiment of the present utility model;

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Sleeve; 11. Fixed end; 12. Extension end; 2. Outlet; 3. Inner chamber; 31. Inlet; 4. Connecting pipe; 5. Blade; 6. Suction port. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0023] Please see Figure 1-3 The present invention discloses a self-cleaning device for a slurry pump impeller, comprising a sleeve 1 installed inside the suction port 6 of the slurry pump, the inner side of the sleeve 1 being provided with a guide for fresh water to enter the slurry pump outlet 2, one end of the outlet 2 being connected to a water inlet 31 for fresh water to enter, and the inner side of the outlet 2 being provided with threaded blades 5, the blades 5 enhancing the flow of fresh water to flush and clean the impeller of the slurry pump.

[0024] Please see Figure 1 The sleeve 1 is inserted into the inner side of the suction port 6. One end of the sleeve 1 is integrally formed with an annular fixed end 11, which fits against one end of the suction port 6. The inner side of the sleeve 1 away from the fixed end 11 is tapered and faces the center of the sleeve 1. The outer side of the fixed end 11 is integrally formed with an extension end 12, which is arc-shaped and extends to the outer side of the suction port 6. The tapered setting at one end of the inner wall of the sleeve 1 guides the ash and slag mixed water to flow towards the center of the slurry pump, so that the ash and slag mixed water and the fresh water in the sleeve 1 are separated. The fresh water can more effectively act on the impeller of the slurry pump for cleaning. The fixed end 11 of the sleeve 1 is fixedly connected to the suction port 6 of the slurry pump, and the tapered setting of the sleeve 1 is close to the inside of the slurry pump.

[0025] Please see Figure 2An annular inner chamber 3 is provided on the inner side of the fixed end 11. The water inlet 31 is located on the inner side of the inner chamber 3 and faces the extension end 12. The water inlet 31 is arc-shaped and passes through the extension end 12. A connecting pipe 4 is installed on the inner side of the water inlet 31 away from the sleeve 1. The connecting pipe 4 extends to the outer side of the slurry pump suction port 6 in conjunction with the extension end 12, which facilitates the connection of water supply pipes and other equipment to provide fresh water flow. The arc-shaped water inlet 31 increases the diffusion range of fresh water flow entering the inner side of the fixed end 11 through the connecting pipe 4, so that the fresh water flow can quickly fill the inner chamber 3 and be evenly distributed between two adjacent blades 5, ensuring the uniformity of the spiral flushing cleaning formed by the fresh water flow through the blades 5.

[0026] Please see Figure 2 The outlet 2 is located inside the sleeve 1 and extends through both ends of the sleeve 1. The outlet 2 is annular and connects to the inner chamber 3. When the annular outlet 2 guides fresh water to clean the impeller, it forms a 360-degree flush, ensuring that there are no dead corners on the impeller surface.

[0027] Please see Figure 2 The blade 5 is fixedly connected to the inner wall of the outlet 2 on the side away from the center of the sleeve 1. The blade 5 is spiral-shaped and distributed in a ring at equal intervals with the center of the outlet 2 as the center point. The spiral blade 5 extends the flow path of the fresh water, so that the fresh water forms a spiral flow, which increases the flow pressure of the fresh water. Under the directional guidance of the outlet 2, the fresh water flow can powerfully clean the impeller of the slurry pump, increase the peeling strength of fine ash on the impeller surface, and prevent the fine ash in the mixed water from settling on the impeller of the slurry pump and affecting the operation of the equipment.

[0028] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning device for a slurry pump impeller, comprising a sleeve (1) installed inside the suction port (6) of the slurry pump, characterized in that: The inner side of the sleeve (1) is provided with an outlet (2) for guiding fresh water flow into the slurry pump. One end of the outlet (2) is connected to an inlet (31) for fresh water flow. The inner side of the outlet (2) is provided with threaded blades (5). The blades (5) enhance the flow of fresh water flow to flush and clean the impeller of the slurry pump.

2. The slurry pump impeller self-cleaning device according to claim 1, characterized in that: The sleeve (1) is inserted into the inside of the suction port (6). One end of the sleeve (1) is integrally formed with a ring-shaped fixed end (11). The fixed end (11) fits against one end of the suction port (6). The inner side of the sleeve (1) away from the fixed end (11) is tapered and faces the center of the sleeve (1).

3. The slurry pump impeller self-cleaning device according to claim 2, characterized in that: An extension end (12) is integrally formed on the outer side of the fixed end (11). The extension end (12) is arc-shaped and extends to the outer side of the inlet (6).

4. The slurry pump impeller self-cleaning device according to claim 3, characterized in that: The fixed end (11) has an annular inner cavity (3) on its inner side, and the water inlet (31) is located on the inner side of the inner cavity (3) and faces the extension end (12).

5. The slurry pump impeller self-cleaning device according to claim 4, characterized in that: The inlet (31) is arc-shaped and extends through the extension end (12). A connecting pipe (4) is installed on the inner side of the inlet (31) away from the sleeve (1).

6. The slurry pump impeller self-cleaning device according to claim 4, characterized in that: The outlet (2) is located inside the sleeve (1) and extends through both ends of the sleeve (1). The outlet (2) is annular and connects to the inner chamber (3).

7. The slurry pump impeller self-cleaning device according to claim 1, characterized in that: The blade (5) is fixedly connected to the inner wall of the outlet (2) on the side away from the center of the sleeve (1). The blade (5) is spiral-shaped and distributed in a ring at equal distances with the center of the outlet (2) as the center point.

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