Pump inlet anti-blocking device

Abstract

The invention relates to the technical field of pump body devices, in particular to a pump inlet anti-blocking device which is characterized in that a confluence cavity and an anti-blocking filtering mechanism are arranged at a feeding pipe opening of a feeding pipe of a screw pump to filter impurities in materials, so that the impurities in the materials are prevented from entering the screw pump; therefore, the problem of blockage caused by accumulation in the screw pump is avoided; according to the anti-blocking filtering mechanism, an anti-blocking filtering net cover in the anti-blocking filtering mechanism is arranged on a mounting flange plate, namely, materials conveyed from a feeding pipeline enter a confluence cavity, impurities in the materials are filtered and blocked through the anti-blocking filtering net cover, the filtered materials enter a circulation pipeline, and then the materials are conveyed through a screw pump; in the process, the arranged anti-blocking auxiliary assembly provides a cleaning function for impurities filtered and blocked on the outer side of the anti-blocking filter screen cover, so that the impurities are prevented from blocking the anti-blocking filter screen cover, and the feeding work of the screw pump is prevented from being influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of pump body devices, in particular to a pump inlet anti-blocking device. Background Art

[0002] The screw pump is a positive displacement rotor pump that relies on the volume change of the sealed chamber formed by the screw and the bushing to suck and discharge the liquid; the screw pump is divided into single screw pump, twin screw pump, three screw pump and five screw pump according to the number of screws; the characteristics of the screw pump are smooth flow, small pressure pulsation, self-priming ability, low noise, high efficiency, long life and reliable operation; and its outstanding advantage is that it does not form eddy currents when conveying the medium, is insensitive to the viscosity of the medium, and can convey high viscosity media; due to the mutual engagement of the screws and the close fit between the screw and the inner wall of the liner, the suction port and the discharge port of the pump will be separated into one or more sealed spaces; as the screws rotate and mesh, these sealed spaces are continuously formed at the suction end of the pump, sealing the liquid in the suction chamber into it, and continuously moving from the suction chamber along the axial direction of the screw to the discharge end, and continuously discharging the liquid enclosed in each space.

[0003] The feed port of the screw pump lacks an appropriate anti-blocking device, that is, to filter out impurities in the material to avoid clogging of the screw pump; the existing solution is generally to set a filter at the end of the feed pipe and fix it with bolts; on the one hand, after long-term use, the impurities filtered and accumulated on the filter will also cause clogging of the filter body, which will affect the material transportation work and further affect the normal operation of the screw pump. It lacks an appropriate cleaning mechanism, that is, to regularly clean the impurities adhered and accumulated on the filter to meet the anti-blocking work requirements of the screw pump.

[0004] To this end, the present invention proposes a pump inlet anti-blocking device for solving the above-mentioned problem. Summary of the Invention

[0005] The object of the present invention is to provide a pump inlet anti-blocking device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a pump inlet anti-blocking device, comprising a confluence cavity, a mounting cavity opening being provided at one end of the confluence cavity, and a butt joint being provided at the other end of the confluence cavity; The mounting cavity mouth and the mounting flange are fixedly connected by bolts, and the mounting flange is fixedly arranged at one end of the circulation pipe, the other end of the circulation pipe is connected to the screw pump feed pipe by a flange, the butt joint is connected to the feeding pipe by a flange, and a first opening and closing control valve is provided on the feeding pipe; a sewage pipe head is provided on the top of the confluence cavity, the sewage pipe head is connected to the output pipe by a flange, and a second opening and closing control valve is provided on the output pipe; a third opening and closing control valve is provided on the circulation pipe; the mounting flange is connected to the anti-blocking filtering mechanism.

[0007] Preferably, the anti-blocking filtering mechanism includes an anti-blocking filter mesh cover, a cover mouth connecting ring body, a first filter hole body, a connecting notch, a tapered pipe head, a second filter hole body and an anti-blocking auxiliary component; a connecting screw groove is provided on the inner side of the mounting flange, and the connecting screw grooves are equidistantly arranged in a ring shape, one end of the anti-blocking filter mesh cover is sealed, and an opening is provided at the other end, and the opening is circular, and a cover mouth connecting ring body is fixedly provided on the outer side wall of the open end of the anti-blocking filter mesh cover.

[0008] Preferably, mounting holes are equidistantly arranged on the cover mouth connecting ring body, and the mounting holes on the cover mouth connecting ring body correspond to the connection screw grooves on the inner side of the mounting flange and are set in the same number of groups. The cover mouth connecting ring body is fixedly connected to the mounting flange by fixing screws.

[0009] Preferably, the anti-blocking filter screen cover is configured to be disc-shaped, and the center lines of the anti-blocking filter screen cover and the pipe opening of the flow pipe are on the same straight line.

[0010] Preferably, first filter holes are evenly arranged on the side walls of the anti-blocking filter cover, and the first filter holes are arranged in a cone shape, that is, the small end of the first filter hole is arranged on the outer wall of the anti-blocking filter cover, and the large end of the first filter hole is arranged on the outer wall of the anti-blocking filter cover.

[0011] Preferably, a communication slot is further provided on the side wall of the anti-blocking filter screen cover, and a conical pipe head is fixedly provided on the outer slot of the communication slot.

[0012] Preferably, second filter holes are evenly arranged on the side wall of the tapered tube head, and the second filter holes are also arranged to be tapered, and the small end opening of the second filter hole is arranged on the outer side wall of the tapered tube head, and the large end opening of the second filter hole is arranged on the inner side wall of the tapered tube head.

[0013] Preferably, the anti-blocking auxiliary assembly comprises a flushing main pipe, a cleaning pump, a first flushing branch pipe, a second flushing branch pipe, a first control valve, a second control valve, a communication port, a flow guide pipe head, an annular pipe fitting and a cleaning spray pipe head; the flushing main pipe is connected with the cleaning pump, and the flushing main pipe is connected with the first flushing branch pipe and the second flushing branch pipe; the first control valve is arranged on the first flushing branch pipe, and the second control valve is arranged on the second flushing branch pipe.

[0014] Preferably, one end of the first flushing branch pipe extends to the inner side of the mounting flange, and the pipe opening of the first flushing branch pipe is fixedly connected with the flow guide pipe head through a flange; the flow guide pipe head is fixedly arranged on one side of the annular pipe fitting, and the cleaning spray pipe head is equidistantly arranged on the inner side of the annular surface of the annular pipe fitting in a ring shape; and the pipe opening of the first flushing branch pipe is located on the outer side of the cover opening of the anti-blocking filter cover.

[0015] Preferably, one end of the second flushing branch pipe is connected with the communication port, and the communication port is arranged in the mounting flange and located on the inner side of the cover opening of the anti-blocking filter cover.

[0016] Compared with the prior art, the present application has the following beneficial effects: The present application sets a flow collecting cavity and an anti-blocking filter mechanism at the position of the feed pipe opening of the screw pump feed pipe to filter impurities in the material, so as to avoid the impurities in the material from entering the screw pump, thereby avoiding the problem of accumulation in the screw pump causing blockage; that is, the anti-blocking filter mechanism is arranged on the mounting flange, and the pipe opening of the flow passage is covered, that is, the material transported from the feed pipe enters the flow collecting cavity, and then the impurities in the material are filtered and blocked by the anti-blocking filter cover, and the filtered material enters the flow passage and is then transported by the screw pump; in this process, the anti-blocking auxiliary assembly provides a cleaning function for the impurities filtered and blocked outside the anti-blocking filter cover, thereby avoiding the impurities from causing blockage of the anti-blocking filter cover, and thereby avoiding affecting the feeding work of the screw pump; and the anti-blocking filter cover in the present application is detachably arranged, which is convenient for disassembly, maintenance and replacement in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a left side view of the structure connection of the pump inlet anti-blocking device and the screw pump of the present application; Figure 2 It is a right side view of the structure connection of the pump inlet anti-blocking device and the screw pump of the present application; Figure 3 It is a right side view of the structure connection of the pump inlet anti-blocking device and the screw pump of the present application; Figure 2 It is an enlarged view of the structure connection at position A in the present application; Figure 4 It is a right side view of the structure connection of the pump inlet anti-blocking device and the screw pump of the present application; Figure 5 The left side schematic view of the connection of the converging cavity structure of the present application; Figure 6 The schematic view of the explosion of the connection of the mounting flange plate and the anti-blocking filter mechanism structure of the present application; Figure 7 The Figure 6 The enlarged schematic view of the structure connection at B; Figure 8 The partial plan view of the structure connection of the anti-blocking filter cover and the conical pipe head of the present application; Figure 9 The Figure 8 The enlarged schematic view of the structure connection at C.

[0018] In the figure: converging cavity 1, mounting cavity opening 2, mounting flange plate 3, flow-through pipeline 4, screw pump feed pipe 5, butt joint pipe head 6, feed pipe 7, first opening and closing control valve 8, blowdown pipe head 9, output pipeline 10, second opening and closing control valve 11, third opening and closing control valve 12, anti-blocking filter cover 1301, cover opening connection ring body 1302, first filter hole body 1303, communication slot 1304, conical pipe head 1305, second filter hole body 1306, flushing main pipe 1401, cleaning pump 1402, first flushing branch pipe 1403, second flushing branch pipe 1404, first control valve 1405, second control valve 1406, communication opening 1407, flow guide pipe head 1408, annular pipe fitting 1409, cleaning spray pipe head 1410. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below. All other embodiments obtained by the person of ordinary skill in the art without creative labor are within the protection scope of the present application.

[0020] Embodiment one: please refer to Figures 1-9 A pump inlet anti-blocking device, comprising a converging cavity 1, a mounting cavity opening 2 is arranged at one end of the converging cavity 1, and a butt joint pipe head 6 is arranged at the other end of the converging cavity 1; the mounting cavity opening 2 and the mounting flange plate 3 are fixedly connected through bolts, the mounting flange plate 3 is fixedly arranged at one end of the flow-through pipeline 4, the other end of the flow-through pipeline 4 is connected with the screw pump feed pipe 5 through a flange, the butt joint pipe head 6 is connected with the feed pipe 7 through a flange, and the feed pipe 7 is provided with a first opening and closing control valve 8; a blowdown pipe head 9 is arranged at the top of the converging cavity 1, the blowdown pipe head 9 is connected with the output pipeline 10 through a flange, and the output pipeline 10 is provided with a second opening and closing control valve 11; the flow-through pipeline 4 is provided with a third opening and closing control valve 12; the mounting flange plate 3 is connected with an anti-blocking filter mechanism.

[0021] This solution filters impurities in the material by setting a confluence cavity 1 and an anti-blocking filter mechanism at the feed pipe mouth of the screw pump feed pipe 5 to prevent impurities in the material from entering the screw pump, thereby avoiding the problem of accumulation and blockage in the screw pump; that is, by setting the anti-blocking filter screen cover 1301 in the anti-blocking filter mechanism on the mounting flange 3 and covering the pipe mouth of the circulation pipe 4, that is, the material transported from the feeding pipe 7 enters the confluence cavity 1, and then passes through the anti-blocking filter screen cover 1301 to filter and block impurities in the material, and the filtered material enters the circulation pipe 4, and then is transported by the screw pump; in this process, the anti-blocking auxiliary component is set to prevent the anti-blocking filter screen cover 1301 from blocking the impurities in the material. 1 provides a cleaning function for impurities blocked by the outer filter, thereby preventing impurities from clogging the anti-blocking filter cover 1301, thereby preventing the feeding work of the screw pump from being affected; the anti-blocking filter cover 1301 is flushed by the cooperation between the cleaning pump 1402, the first flushing branch pipe 1403, the second flushing branch pipe 1404, the first control valve 1405, the second control valve 1406 and the cleaning nozzle head 1410 in the anti-blocking auxiliary component, that is, the cleaning water is transported by the cleaning pump 1402, so that the cleaning water is transported through the first flushing branch pipe 1403 and the second flushing branch pipe 1404, and the cleaning water is respectively transported into the confluence cavity 1, thereby flushing the anti-blocking filter cover 1301.

[0022] When the screw pump is used for feeding, the material is fed through the feeding pipe 7. At this time, the first opening and closing control valve 8 arranged on the feeding pipe 7 is opened, and the second opening and closing control valve 11 arranged on the output pipe 10 is closed. The material transported from the feeding pipe 7 enters the confluence cavity 1, and then passes through the anti-blocking filter mesh cover 1301 to filter the material. The filtered material enters the circulation pipe 4 and finally enters the screw pump feed pipe 5, and is then fed through the screw pump; the first control valve 1405 on the first flushing branch 1403 and the second control valve 1406 on the second flushing branch 1404 are also in a closed state; the anti-blocking filtering mechanism includes an anti-blocking filter mesh cover 1301, a cover mouth connecting ring body 1302, a first filter hole body 1303, a connecting notch 1304, a conical pipe head 1305, a second Filter hole body 1306 and anti-blocking auxiliary component; a connecting screw groove is provided on the inner side of the mounting flange 3, and the connecting screw groove is equidistantly arranged in a ring shape, one end of the anti-blocking filter cover 1301 is sealed, and an opening is provided at the other end, and the opening is circular, and a cover mouth connecting ring body 1302 is fixedly provided on the outer side wall of the open end of the anti-blocking filter cover 1301; mounting holes are equidistantly provided on the cover mouth connecting ring body 1302, and the mounting holes on the cover mouth connecting ring body 1302 correspond to the setting positions of the connecting screw grooves on the inner side of the mounting flange 3 and are set in the same group number, and the cover mouth connecting ring body 1302 is fixedly connected to the mounting flange 3 by fixing screws; the anti-blocking filter cover 1301 is set to a disc shape, and the center lines of the anti-blocking filter cover 1301 and the pipe mouth of the circulation pipe 4 are on the same straight line; the first filter hole body 1303 is evenly provided on the side wall of the anti-blocking filter cover 1301.

[0023] For the setting of the anti-blocking filter cover 1301, the cover connecting ring body 1302 is fixedly connected with the mounting flange plate 3 at the end cover opening position and is detachably arranged, which facilitates the later replacement and maintenance work. Furthermore, the first filter hole body 1303 is uniformly arranged on the side wall of the anti-blocking filter cover 1301, and the first filter hole body 1303 is arranged in a conical shape, that is, the small end of the first filter hole body 1303 is arranged on the outer side wall of the anti-blocking filter cover 1301, and the large end of the first filter hole body 1303 is arranged on the outer side wall of the anti-blocking filter cover 1301. In addition, the communication groove 1304 is arranged on the side wall of the anti-blocking filter cover 1301, and the outer side groove of the communication groove 1304 is fixedly provided with a conical pipe head 1305. The second filter hole body 1306 is uniformly arranged on the side wall of the conical pipe head 1305, and the second filter hole body 1306 is also arranged in a conical shape, and the small end hole of the second filter hole body 1306 is arranged on the outer side wall of the conical pipe head 1305, and the large end hole of the second filter hole body 1306 is arranged on the inner side wall of the conical pipe head 1305. That is, the conical pipe head 1305 and the second filter hole body 1306 uniformly arranged on the conical pipe head 1305 are arranged to increase the filtering area of the anti-blocking filter cover 1301 and improve the anti-blocking effect. When filtering the material, the impurities are blocked on the outside of the anti-blocking filter cover 1301, or stay on the side wall of the anti-blocking filter cover 1301, and adhere to the side wall of the conical pipe head 1305 outside the anti-blocking filter cover 1301.

[0024] The anti-blocking auxiliary assembly in the scheme includes a flushing main pipe 1401, a cleaning pump 1402, a first flushing branch pipe 1403, a second flushing branch pipe 1404, a first control valve 1405, a second control valve 1406, a communication port 1407, a flow guide pipe head 1408, an annular pipe 1409, and a cleaning spray pipe head 1410. The flushing main pipe 1401 is connected with the cleaning pump 1402, and the flushing main pipe 1401 is connected with the first flushing branch pipe 1403 and the second flushing branch pipe 1404. The first control valve 1405 is arranged on the first flushing branch pipe 1403, and the second control valve 1406 is arranged on the second flushing branch pipe 1404. One end of the first flushing branch pipe 1403 extends to the inner side of the mounting flange plate 3, and the pipe opening of the first flushing branch pipe 1403 is fixedly connected with the flow guide pipe head 1408 through a flange. The flow guide pipe head 1408 is fixedly arranged on one side of the annular pipe 1409, and the cleaning spray pipe head 1410 is equidistantly arranged on the inner side of the annular surface of the annular pipe 1409, and the cleaning spray pipe head 1410 is equidistantly arranged in a ring shape. The pipe opening of the first flushing branch pipe 1403 is outside the cover opening of the anti-blocking filter cover 1301. One end of the second flushing branch pipe 1404 is connected with the communication port 1407, and the communication port 1407 is arranged in the mounting flange plate 3 and is inside the cover opening of the anti-blocking filter cover 1301.

[0025] During the operation of the anti-blocking filter screen cover 1301, a lot of impurities will adhere to and accumulate on its outer wall. If not handled in time, it will cause the anti-blocking filter screen cover 1301 to be blocked, which will affect the material transportation efficiency. Therefore, it is necessary to clean the impurities adhered and accumulated on the outer wall of the anti-blocking filter screen cover 1301 in time. At this time, it is necessary to first close the first opening and closing control valve 8 on the feeding pipe 7 to block the feeding of the material, and then after the remaining material is transported, close the third opening and closing control valve 12 on the circulation pipe 4, and then open the second opening and closing control valve 11 on the sewage pipe head 9. At this time Then open the second control valve 1406 on the second flushing branch pipe 1404. Do not open the first control valve 1405 on the first flushing branch pipe 1403 first, that is, make the first control valve 1405 in the closed state first. At this time, start the cleaning pump 1402 on the flushing main pipe 1401 to output the flushing water from the second flushing branch pipe 1404. The output clean water is then sprayed out from the connecting port 1407 on the mounting flange 3. The purpose is to first flush from the inner cavity of the anti-blocking filter cover 1301, that is, to avoid the adhesion and accumulation of the anti-blocking filter cover 1301 when flushing the anti-blocking filter cover 1301. The impurities on the cover 1301 enter the inner cavity of the anti-blocking filter screen cover 1301 along with the water flow. After the anti-blocking filter screen cover 1301 is installed, the connecting port 1407 on the mounting flange 3 is located in the inner cavity of the anti-blocking filter screen cover 1301, that is, the cleaning water sprayed from the connecting port 1407 will be flushed from the inner cavity of the anti-blocking filter screen cover 1301, that is, the clean water flows out from the inner cavity of the anti-blocking filter screen cover 1301, and the cleaning water flows out from the first filter hole 1303 on the side wall of the anti-blocking filter screen cover 1301, and flows out from the second filter hole 1306 on the side wall of the tapered pipe head 1305, and finally the clean water flows out. The washed sewage is then discharged from the sewage pipe head 9 at the top of the confluence cavity 1; then the first control valve 1405 on the first flushing branch pipe 1403 is opened, so that the cleaning water is output from the first flushing branch pipe 1403, and then enters the annular pipe 1409 through the guide pipe head 1408, and finally is sprayed out through the cleaning nozzle head 1410 arranged on the inner annular surface of the annular pipe 1409, and the outer wall of the anti-blocking filter screen cover 1301 is flushed again to improve its flushing and cleaning effect; that is, the problem of impurities on the anti-blocking filter screen cover 1301 causing blockage is avoided, thereby ensuring the normal operation of the material conveying work.

[0026] When the cleaning work of the anti-blocking filter screen cover 1301 is completed, the operation of the cleaning pump 1402 is stopped, then the first control valve 1405 on the first flushing branch pipe 1403 and the second control valve 1406 on the second flushing branch pipe 1404 are closed in turn, and finally the second opening and closing control valve 11 on the output pipeline 10 is closed; then the first opening and closing control valve 8 on the feeding pipeline 7 and the third opening and closing control valve 12 on the flow pipeline 4 are opened, and the material conveying work continues; if the anti-blocking filter screen cover 1301 needs to be replaced, the fixing connection between the mounting flange plate 3 and the confluence cavity body 1 is first released, then the anti-blocking filter screen cover 1301 is removed, then the new anti-blocking filter screen cover 1301 is fixed on the mounting flange plate 3, and finally the mounting flange plate 3 is clamped in the mounting cavity opening 2 at one end of the confluence cavity body 1, and then the mounting flange plate 3 is fixed by bolts; when the anti-blocking filter screen cover 1301 is installed and fixed, the communication port 1407 on the mounting flange plate 3 is in the inner cavity of the anti-blocking filter screen cover 1301, that is, it is ensured that the cleaning water sprayed from the communication port 1407 during subsequent cleaning work enters the inner cavity of the anti-blocking filter screen cover 1301; at the same time, the pipe opening of the first flushing branch pipe 1403 is arranged at the outer side of the anti-blocking filter screen cover 1301, that is, the cleaning water conveyed in the first flushing branch pipe 1403 is mainly used to flush the anti-blocking filter screen cover 1301 from the outside; that is, the installed anti-blocking filter screen cover 1301 is inside the annular surface of the annular pipe 1409, and the center line of the annular pipe 1409 and the center line of the anti-blocking filter screen cover 1301 are on the same straight line, that is, when the cleaning spray pipe head 1410 inside the annular surface of the annular pipe 1409 sprays water for cleaning, the cleaning spray pipe head 1410 is around the side of the anti-blocking filter screen cover 1301, which is convenient for flushing the outer annular surface of the anti-blocking filter screen cover 1301 and improves the flushing efficiency.

[0027] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pump inlet anti-blocking device, comprising a confluence cavity (1), wherein a mounting cavity opening (2) is provided at one end of the confluence cavity (1), and a butt joint (6) is provided at the other end of the confluence cavity (1); Its characteristics are: The mounting cavity (2) is fixedly connected to the mounting flange (3) by bolts, and the mounting flange (3) is fixedly arranged at one end of the circulation pipe (4), and the other end of the circulation pipe (4) is connected to the screw pump feed pipe (5) by a flange, and the butt joint (6) is connected to the feeding pipe (7) by a flange, and the feeding pipe (7) is provided with a first opening and closing control valve (8); a sewage pipe head (9) is provided at the top of the confluence cavity (1), and the sewage pipe head (9) is connected to the output pipe (10) by a flange, and a second opening and closing control valve (11) is provided on the output pipe (10); a third opening and closing control valve (12) is provided on the circulation pipe (4); and the mounting flange (3) is connected to the anti-blocking filtering mechanism.

2. The pump inlet anti-blocking device according to claim 1, characterized in that: The anti-blocking filtering mechanism comprises an anti-blocking filter screen cover (1301), a cover mouth connecting ring body (1302), a first filter hole body (1303), a connecting notch (1304), a tapered pipe head (1305), a second filter hole body (1306) and an anti-blocking auxiliary component; a connecting screw groove is provided on the inner side of the mounting flange (3), and the connecting screw grooves are equidistantly arranged in a ring shape; one end of the anti-blocking filter screen cover (1301) is sealed, and the other end is provided with an opening, and the opening is circular; a cover mouth connecting ring body (1302) is fixedly provided on the outer side wall of the open end of the anti-blocking filter screen cover (1301).

3. The pump inlet anti-blocking device according to claim 2, characterized in that: The hood connection ring body (1302) is provided with mounting holes at equal intervals, and the mounting holes on the hood connection ring body (1302) correspond to the connection screw grooves on the inner side of the mounting flange (3) in the same position and are provided in the same number of groups, and the hood connection ring body (1302) is fixedly connected to the mounting flange (3) by fixing screws.

4. The pump inlet anti-blocking device according to claim 2, characterized in that: The anti-blocking filter screen cover (1301) is configured in a disc shape, and the center lines of the anti-blocking filter screen cover (1301) and the pipe opening of the circulation pipe (4) are on the same straight line.

5. The pump inlet anti-blocking device according to claim 2, characterized in that: The first filter holes (1303) are evenly arranged on the side wall of the anti-blocking filter screen cover (1301), and the first filter holes (1303) are arranged in a conical shape, that is, the small end of the first filter holes (1303) is arranged on the outer wall of the anti-blocking filter screen cover (1301), and the large end of the first filter holes (1303) is arranged on the outer wall of the anti-blocking filter screen cover (1301).

6. The pump inlet anti-blocking device according to claim 2, characterized in that: A communication notch (1304) is also provided on the side wall of the anti-blocking filter screen cover (1301), and a tapered pipe head (1305) is fixedly provided on the outer notch of the communication notch (1304).

7. The pump inlet anti-blocking device according to claim 2, characterized in that: Second filter pores (1306) are evenly arranged on the side wall of the tapered tube head (1305), and the second filter pores (1306) are also arranged in a tapered shape, and the small end opening of the second filter pores (1306) is arranged on the outer side wall of the tapered tube head (1305), and the large end opening of the second filter pores (1306) is arranged on the inner side wall of the tapered tube head (1305).

8. The pump inlet anti-blocking device according to claim 2, characterized in that: The anti-blocking auxiliary component comprises a flushing main pipe (1401), a cleaning pump (1402), a first flushing branch pipe (1403), a second flushing branch pipe (1404), a first control valve (1405), a second control valve (1406), a connecting port (1407), a flow guide pipe head (1408), an annular pipe fitting (1409) and a cleaning nozzle head (1410); the flushing main pipe (1401) is connected to the cleaning pump (1402), and the flushing main pipe (1401) is connected to the first flushing branch pipe (1403) and the second flushing branch pipe (1404); the first control valve (1405) is provided on the first flushing branch pipe (1403), and the second control valve (1406) is provided on the second flushing branch pipe (1404).

9. The pump inlet anti-blocking device according to claim 8, characterized in that: One end of the first flushing branch pipe (1403) extends to the inner side of the mounting flange (3), and the pipe opening of the first flushing branch pipe (1403) is fixedly connected to the guide pipe head (1408) via a flange. The guide pipe head (1408) is fixedly arranged on one side of the annular pipe fitting (1409), and cleaning nozzle heads (1410) are equidistantly arranged on the inner side of the annular surface of the annular pipe fitting (1409), and the cleaning nozzle heads (1410) are equidistantly arranged in a ring shape. The pipe opening of the first flushing branch pipe (1403) is located outside the cover opening of the anti-blocking filter screen cover (1301).

10. The pump inlet anti-blocking device according to claim 8, characterized in that: One end of the second flushing branch pipe (1404) is connected to the communication port (1407), and the communication port (1407) is arranged in the mounting flange (3), and the communication port (1407) is located on the inner side of the cover of the anti-blocking filter screen cover (1301).

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