Anti-blocking multi-flow fluoroplastic centrifugal pump

Abstract

The anti-blocking multi-flow fluoroplastic centrifugal pump comprises a centrifugal pump body, a liquid inlet cavity is formed in a shell of the centrifugal pump body, an impeller assembly is arranged in the liquid inlet cavity, a fixing base is arranged on the side wall, right facing the liquid inlet cavity, of the shell of the centrifugal pump body, and a first cavity and a second cavity are formed in the fixing base. Liquid guided into a circular circulation opening is filtered through a first filter screen and a second filter screen, impurities are prevented from blocking a liquid inlet cavity, the conveying effect of the centrifugal pump body is ensured, circulation of the liquid in the first cavity is accelerated through rotation of an annular block and a conical drainage rod in cooperation with a plurality of flow separation plates, and the liquid in the first cavity is dredged through rotation of an L-shaped dredging block and a spiral dredging rod; impurities entering the second cavity through the first filter screen are smashed, the liquid circulation effect is ensured, the first circulation pipe is matched with the pipeline connecting piece to guide fluid in the second cavity into the first cavity in a multi-flow-channel mode, liquid conveying blockage caused by blockage is prevented, and the liquid inlet effect of the centrifugal pump body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fluoroplastic centrifugal pumps, in particular to an anti-clogging multi-flow fluoroplastic centrifugal pump. Background Art

[0002] Fluoroplastic centrifugal pumps can be used to transport any highly corrosive media. The corrosion resistance and wear resistance of fluoroplastic centrifugal pumps have been unanimously recognized in actual use. They are widely used in chlorine water wastewater treatment and acid addition processes in ion membrane caustic soda projects. Relying on the high-speed rotation of the impeller, the liquid in the center of the impeller is forced to be thrown away at a very high speed, thereby forming a low pressure in the center of the impeller. The liquid in the low-level tank is therefore continuously sucked up. In order to prevent the liquid poured into the pump casing from flowing into the low-level tank due to gravity, a check valve is installed at the inlet of the pump suction pipe. If the pump is located below the liquid level in the tank, there is no need to fill the pump when starting.

[0003] In actual use, the existing fluoroplastic centrifugal pump lacks a filtering structure at its liquid inlet, which can easily cause blockage in the liquid inlet cavity of the centrifugal pump, affecting the delivery effect of the fluoroplastic centrifugal pump. In addition, the flow port at the liquid inlet cavity is single, which can easily cause infusion blockage. An anti-blocking multi-flow fluoroplastic centrifugal pump is proposed to solve the above problems. Summary of the invention

[0004] In view of the deficiencies and defects in the prior art, the present invention proposes an anti-clogging multi-flow fluoroplastic centrifugal pump, which is used to solve the technical problems that the existing fluoroplastic centrifugal pumps in the background technology lack a filtering structure at the liquid inlet during actual use, which easily leads to blockage in the liquid inlet cavity of the centrifugal pump, affecting the conveying effect of the fluoroplastic centrifugal pump, and the flow port at the liquid inlet cavity is single, which easily causes infusion blockage.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-flow fluoroplastic centrifugal pump with anti-clogging comprises a centrifugal pump body, a liquid inlet cavity is arranged in the shell of the centrifugal pump body, an impeller assembly is arranged in the liquid inlet cavity, a fixing seat is arranged on the side wall of the shell of the centrifugal pump body facing the liquid inlet cavity, a first cavity and a second cavity are arranged in the fixing seat, the first cavity, the second cavity and the liquid inlet cavity are connected, a drainage mechanism is vertically rotated and penetrated on the top surface of the center position of the first cavity, a dredging mechanism is vertically rotated and penetrated on the top surface of the center position of the second cavity, the drainage mechanism is connected to the dredging mechanism in transmission connection, a filtering mechanism is penetrated on the top surface of the second cavity close to the left and right sides, and a circulation mechanism is connected between the first cavity and the second cavity.

[0006] Preferably, an annular sealing block is fixedly connected to the side wall of the shell of the centrifugal pump body facing the fixed seat, an annular slot is provided on the side wall of the fixed seat facing the centrifugal pump body, the annular sealing block is inserted in the annular slot, and a connecting block is fixedly connected to the lower end of the fixed seat near the centrifugal pump body, and two threaded protrusions are provided on the side wall of the shell of the centrifugal pump body facing the connecting block, both of the threaded protrusions are horizontally penetrated through the connecting block, and nuts are threadedly sleeved on the two threaded protrusions, and both of the nuts are pressed against the connecting block.

[0007] Preferably, the annular sealing block is a corrosion-resistant rubber product, and the threaded protrusion is integrally formed with the shell of the centrifugal pump body.

[0008] Preferably, the drainage mechanism includes a bracket fixedly mounted on a fixing seat near the upper end of a centrifugal pump body, a driving motor is fixedly mounted on the upper end of the bracket, a connecting rod is fixedly connected to the lower end of a driving shaft of the driving motor, the lower end of the connecting rod is vertically rotated and penetrates the top surface of the first cavity, a driving wheel is coaxially fixedly connected to one end of the connecting rod located in the bracket, the driving wheel is transmission-connected to the dredging mechanism, a plurality of annular blocks are fixedly connected to one end of the connecting rod located in the first cavity, two symmetrically distributed conical drainage rods are fixedly connected to the annular side walls of the plurality of annular blocks, a plurality of flow partitions are fixedly connected to the front and rear inner walls of the first cavity, and the plurality of annular blocks are respectively located between two adjacent flow partitions.

[0009] Preferably, the dredging mechanism includes a rotating rod which rotates vertically and passes through the top surface of the center position of the second cavity, and a driven wheel is coaxially fixedly connected to one end of the rotating rod located outside the second cavity, and the driving wheel and the driven wheel are connected by belt drive, and a circular block is fixedly connected to the lower end of the rotating rod, and two symmetrically distributed L-shaped dredging blocks are fixedly connected to the annular side wall of the circular block, and a spiral dredging rod is fixedly connected to the lower end of the circular block, and a number of conical teeth are fixedly connected to the side walls of the two L-shaped dredging blocks facing the spiral dredging rod.

[0010] Preferably, the filtering mechanism includes two limiting protrusions fixedly connected to the top and bottom surfaces of the second cavity, respectively; a circular flow port is provided on the left inner wall of the second cavity; the two limiting protrusions on the same horizontal plane are respectively arranged close to the left and right inner walls of the second cavity; a first filter screen and a second filter screen are vertically sealed and penetrated on the top surfaces of the second cavity close to the left and right sides; the first filter screen is pressed against the two limiting protrusions on the left and the inner wall of the second cavity, and the second filter screen is pressed against the two limiting protrusions on the right and the inner wall of the second cavity; a pull block is fixedly connected to the upper ends of the two first and second filter screens.

[0011] Preferably, the limiting protrusion and the fixing seat are integrally formed, and the filter hole diameter of the second filter screen is smaller than the filter hole diameter of the first filter screen.

[0012] Preferably, the circulation mechanism includes first circulation tubes respectively connected to the front and rear inner walls of the second cavity, the two first circulation tubes are arranged near the limiting protrusion on the lower right side, the first cavity is connected to the front and rear inner walls near the second cavity with second circulation tubes, the three second circulation tubes on the same side are connected to one end located outside the first cavity with pipe connectors, and the two first circulation tubes are connected to the two pipe connectors respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The first filter screen and the second filter screen are used to filter the liquid introduced into the circular flow port to prevent impurities from clogging the liquid inlet cavity and ensure the conveying effect of the centrifugal pump body.

[0014] 2. The annular block and the conical drainage rod rotate, and a number of flow partitions are used to accelerate the flow of liquid in the first cavity. The rotating rod drives the L-shaped dredging block and the spiral dredging rod to rotate, and the impurities that pass through the first filter screen and enter the second cavity are crushed to ensure the liquid circulation effect.

[0015] 3. The fluid in the second cavity is introduced into the first cavity through multiple flow channels through the first flow pipe in cooperation with the pipeline connector, so as to prevent blockage of the infusion and improve the liquid inlet effect of the centrifugal pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective schematic diagram of an anti-clogging multi-flow fluoroplastic centrifugal pump proposed by the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 A schematic structural diagram of an annular sealing block of an anti-clogging multi-flow fluoroplastic centrifugal pump proposed by the present invention; Figure 4 for Figure 1 A partial enlarged view of point B in the middle; Figure 5 A schematic diagram of the structure of a drainage mechanism of an anti-clogging multi-flow fluoroplastic centrifugal pump proposed by the present invention; Figure 6 for Figure 1 A partial enlarged view of point C in the middle; Figure 7 A schematic diagram of the structure of a dredging mechanism for an anti-clogging multi-flow fluoroplastic centrifugal pump proposed by the present invention; Figure 8A schematic structural diagram of a second filter screen and a pull block of an anti-clogging multi-flow fluoroplastic centrifugal pump proposed by the present invention; Fig. 9 The present invention provides a schematic structural diagram of a fixing seat and a circulation mechanism of an anti-clogging multi-flow fluoroplastic centrifugal pump.

[0017] In the figure: 1 centrifugal pump body, 2 liquid inlet cavity, 3 impeller assembly, 4 fixed seat, 5 first cavity, 6 second cavity, 7 annular sealing block, 8 annular slot, 9 connecting block, 10 threaded protrusion, 11 nut, 12 bracket, 13 driving motor, 14 connecting rod, 15 driving wheel, 16 annular block, 17 conical drainage rod, 18 flow partition, 19 rotating rod, 20 driven wheel, 21 circular block, 22 L-type dredging block, 23 spiral dredging rod, 24 conical teeth, 25 limiting protrusion, 26 circular flow port, 27 first filter screen, 28 second filter screen, 29 pulling block, 30 first flow pipe, 31 second flow pipe, 32 pipeline connector. DETAILED DESCRIPTION

[0018] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-9As shown, a multi-flow fluoroplastic centrifugal pump with anti-clogging comprises a centrifugal pump body 1, a liquid inlet chamber 2 is arranged in the shell of the centrifugal pump body 1, an impeller assembly 3 is arranged in the liquid inlet chamber 2, a fixing seat 4 is arranged on the side wall of the shell of the centrifugal pump body 1 facing the liquid inlet chamber 2, an annular sealing block 7 is fixedly connected to the side wall of the shell of the centrifugal pump body 1 facing the fixing seat 4, an annular slot 8 is arranged on the side wall of the fixing seat 4 facing the centrifugal pump body 1, the annular sealing block 7 is inserted in the annular slot 8, a connecting block 9 is fixedly connected to the lower end of the fixing seat 4 near the centrifugal pump body 1, and the shell of the centrifugal pump body 1 faces the connecting block Two threaded protrusions 10 are provided on the side wall of 9, and the two threaded protrusions 10 are horizontally penetrated through the connecting block 9. Nuts 11 are threadedly sleeved on the two threaded protrusions 10, and the two nuts 11 are pressed against the connecting block 9. The annular sealing block 7 is a corrosion-resistant rubber product. The threaded protrusions 10 and the shell of the centrifugal pump body 1 are integrally formed. The annular sealing block 7 is inserted into the annular slot 8 to prevent liquid from flowing out from between the fixing seat 4 and the shell of the centrifugal pump body 1, and the two threaded protrusions 10 are horizontally penetrated through the connecting block 9 and then fixed with the nuts 11, so that the fixing seat 4 can be easily disassembled and replaced.

[0021] A first cavity 5 and a second cavity 6 are provided in the fixed seat 4, and the first cavity 5, the second cavity 6 and the liquid inlet cavity 2 are connected to each other. A drainage mechanism is vertically rotated and penetrated on the top surface of the center position of the first cavity 5. The drainage mechanism includes a bracket 12 fixedly installed on the fixed seat 4 near the upper end of the centrifugal pump body 1, and a driving motor 13 is fixedly installed on the upper end of the bracket 12. A connecting rod 14 is fixedly connected to the lower end of the driving shaft of the driving motor 13. The lower end of the connecting rod 14 is vertically rotated and penetrates the top surface of the first cavity 5. A driving wheel 15 is coaxially fixedly connected to one end of the connecting rod 14 located in the bracket 12. The driving motor 13 drives the connecting rod 14 and the main The driving wheel 15 rotates, and the driving wheel 15 is connected to the dredging mechanism in a transmission manner. One end of the connecting rod 14 located in the first cavity 5 is fixedly connected to a plurality of annular blocks 16, and two symmetrically distributed conical drainage rods 17 are fixedly connected to the annular side walls of the plurality of annular blocks 16. A plurality of flow partitions 18 are fixedly connected to the inner walls on both sides of the front and rear of the first cavity 5, and the plurality of annular blocks 16 are respectively located between two adjacent flow partitions 18, so that the connecting rod 14 drives the plurality of annular blocks 16 and the conical drainage rods 17 to rotate, so that the plurality of conical drainage rods 17 continuously rotate to push the liquid flow between the plurality of flow partitions 18, thereby accelerating the liquid flow in the first cavity 5.

[0022] A dredging mechanism is vertically rotated and penetrated on the top surface of the center position of the second cavity 6, and the drainage mechanism is connected to the dredging mechanism in a transmission manner. The dredging mechanism includes a rotating rod 19 that vertically rotates and penetrates on the top surface of the center position of the second cavity 6. The rotating rod 19 is located outside the second cavity 6. One end is coaxially fixedly connected to a driven wheel 20. The driving wheel 15 rotates to drive the driven wheel 20 connected by the belt transmission to rotate, so that the driven wheel 20 drives the coaxially connected rotating rod 19 to rotate. The driving wheel 15 and the driven wheel 20 are connected by a belt transmission. The lower end of the rotating rod 19 is fixedly connected to a circular block 21, and the circular block 2 1 are fixedly connected to the annular side wall of two symmetrically distributed L-shaped dredging blocks 22, the lower end of the circular block 21 is fixedly connected to the spiral dredging rod 23, and the side walls of the two L-shaped dredging blocks 22 facing the spiral dredging rod 23 are fixedly connected to a plurality of conical teeth 24. The rotating rod 19 rotates to drive the circular block 21 to rotate, so that the circular block 21 drives the L-shaped dredging block 22 and the spiral dredging rod 23 to rotate, and the plurality of conical teeth 24 on the L-shaped dredging block 22 cooperate with the spiral dredging rod 23 to crush the impurities that pass through the first filter screen 27 and enter the second cavity 6, thereby ensuring the circulation effect of the liquid.

[0023] A filtering mechanism is provided on the top surface of the second cavity 6 near the left and right sides, and the filtering mechanism includes two limiting protrusions 25 fixedly connected to the top and bottom surfaces of the second cavity 6, respectively. A circular flow port 26 is provided on the left inner wall of the second cavity 6. Two limiting protrusions 25 on the same horizontal plane are respectively arranged near the left and right inner walls of the second cavity 6. A first filter screen 27 and a second filter screen 28 are vertically sealed and penetrated on the top surface of the second cavity 6 near the left and right sides. The first filter screen 27 is pressed against the two limiting protrusions 25 on the left and the inner wall of the second cavity 6, and the second filter screen 28 is pressed against the two limiting protrusions 25 on the right and the inner wall of the second cavity 6. The two first filter screens 27 and the second filter screen 28 are pressed against the two limiting protrusions 25 on the right and the inner wall of the second cavity 6. The upper ends of the two filter screens 28 are fixedly connected with a pull block 29, and the limiting protrusion 25 and the fixing seat 4 are integrally formed. The filter hole diameter of the second filter screen 28 is smaller than the filter hole diameter of the first filter screen 27. The first filter screen 27 and the second filter screen 28 are vertically sealed and penetrate the top surface of the second cavity 6, so that the first filter screen 27 is pressed against the two limiting protrusions 25 on the left and the left inner wall of the second cavity 6, and the second filter screen 28 is pressed against the two limiting protrusions 25 on the right and the right inner wall of the second cavity 6, so that the first filter screen 27 cooperates with the second filter screen 28 to filter the liquid introduced by the circular flow port 26 to prevent impurities from clogging the liquid inlet cavity 2, thereby ensuring the conveying effect of the centrifugal pump body 1.

[0024] A circulation mechanism is provided between the first cavity 5 and the second cavity 6, and the circulation mechanism includes first circulation tubes 30 respectively provided on the inner walls on the front and rear sides of the second cavity 6, and the two first circulation tubes 30 are provided near the limiting protrusion 25 at the lower right side, and the inner walls on the front and rear sides of the first cavity 5 near the second cavity 6 are provided with second circulation tubes 31, and one end of the three second circulation tubes 31 on the same side located outside the first cavity 5 is provided with a pipe connector 32, and the two first circulation tubes 30 are respectively provided with the two pipe connectors 32, and the first circulation tubes 30 cooperate with the pipe connector 32 to introduce the fluid in the second cavity 6 into the first cavity 5 through multiple channels, so as to prevent the infusion blockage caused by the blockage, and improve the liquid inlet effect of the centrifugal pump body 1.

[0025] When the present invention is in use, the external fluid pipeline is fixedly installed on the left side of the fixing seat 4 and connected to the circular flow port 26. The driving motor 13 on the start bracket 12 drives the connecting rod 14 and the driving wheel 15 to rotate, so that the connecting rod 14 drives the plurality of annular blocks 16 and the conical drainage rods 17 to rotate, so that the plurality of conical drainage rods 17 continuously rotate to push the liquid flow between the plurality of flow partitions 18, thereby accelerating the liquid flow in the first cavity 5. On the other hand, the rotation of the driving wheel 15 drives the driven wheel 20 connected by the belt drive to rotate, so that the driven wheel 20 drives the coaxially connected rotating rod 19 to rotate, and the rotation of the rotating rod 19 drives the circular block 21 to rotate, so that the circular block 21 drives the L-shaped dredging block 22 and the spiral dredging rod 23 to rotate, and the plurality of conical teeth 24 on the L-shaped dredging block 22 cooperate with the spiral dredging rod 23 to rotate. The unblocking rod 23 is rotated to crush the impurities that pass through the first filter screen 27 and enter the second cavity 6 to ensure the circulation effect of the liquid. The first filter screen 27 and the second filter screen 28 are vertically sealed and penetrate the top surface of the second cavity 6, so that the first filter screen 27 is pressed against the two limiting protrusions 25 on the left and the left inner wall of the second cavity 6, and the second filter screen 28 is pressed against the two limiting protrusions 25 on the right and the right inner wall of the second cavity 6, so that the first filter screen 27 cooperates with the second filter screen 28 to filter the liquid introduced by the circular flow port 26 to prevent impurities from clogging the liquid inlet cavity 2 and ensure the conveying effect of the centrifugal pump body 1. The first flow pipe 30 cooperates with the pipeline connector 32 to introduce the fluid in the second cavity 6 into the first cavity 5 through multiple channels to prevent infusion blockage after blockage and improve the liquid inlet effect of the centrifugal pump body 1.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-clogging multi-flow fluoroplastic centrifugal pump, comprising a centrifugal pump body (1), a liquid inlet cavity (2) being provided in the shell of the centrifugal pump body (1), and an impeller assembly (3) being provided in the liquid inlet cavity (2), characterized in that: A fixing seat (4) is provided on the side wall of the shell of the centrifugal pump body (1) facing the liquid inlet chamber (2); a first cavity (5) and a second cavity (6) are provided in the fixing seat (4); the first cavity (5), the second cavity (6) and the liquid inlet chamber (2) are connected to each other; a drainage mechanism is provided on the top surface at the center of the first cavity (5) so as to be vertically rotatable and penetrated; a dredging mechanism is provided on the top surface at the center of the second cavity (6) so as to be vertically rotatable and penetrated; the drainage mechanism is connected to the dredging mechanism in a transmission manner; a filtering mechanism is provided on the top surface of the second cavity (6) near the left and right sides; and a circulation mechanism is provided between the first cavity (5) and the second cavity (6) so as to be connected to each other.

2. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 1, characterized in that: An annular sealing block (7) is fixedly connected to the side wall of the shell of the centrifugal pump body (1) facing the fixing seat (4); an annular slot (8) is provided on the side wall of the fixing seat (4) facing the centrifugal pump body (1); the annular sealing block (7) is inserted into the annular slot (8); a connecting block (9) is fixedly connected to the lower end of the fixing seat (4) close to the centrifugal pump body (1); two threaded protrusions (10) are provided on the side wall of the shell of the centrifugal pump body (1) facing the connecting block (9); the two threaded protrusions (10) are horizontally penetrated through the connecting block (9); nuts (11) are threadedly sleeved on the two threaded protrusions (10); the two nuts (11) are pressed against the connecting block (9).

3. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 2, characterized in that: The annular sealing block (7) is a corrosion-resistant rubber product, and the threaded protrusion (10) is integrally formed with the shell of the centrifugal pump body (1).

4. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 1, characterized in that: The drainage mechanism comprises a bracket (12) fixedly mounted on a fixing seat (4) near the upper end of a centrifugal pump body (1); a driving motor (13) is fixedly mounted on the upper end of the bracket (12); a connecting rod (14) is fixedly connected to the lower end of a driving shaft of the driving motor (13); the lower end of the connecting rod (14) is arranged to rotate vertically and penetrate the top surface of the first cavity (5); a driving wheel (15) is coaxially fixedly connected to one end of the connecting rod (14) located in the bracket (12); the driving wheel (15) is transmission-connected to the dredging mechanism; a plurality of annular blocks (16) are fixedly connected to one end of the connecting rod (14) located in the first cavity (5); two symmetrically distributed conical drainage rods (17) are fixedly connected to the annular side walls of the plurality of annular blocks (16); a plurality of flow partitions (18) are fixedly connected to the inner walls on both sides of the front and rear of the first cavity (5); the plurality of annular blocks (16) are respectively located between two adjacent flow partitions (18).

5. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 4, characterized in that: The dredging mechanism comprises a rotating rod (19) which is vertically rotatable and passes through the top surface of the center position of the second cavity (6); the rotating rod (19) is coaxially fixedly connected to a driven wheel (20) on one end located outside the second cavity (6); the driving wheel (15) and the driven wheel (20) are connected by a belt transmission; the lower end of the rotating rod (19) is fixedly connected to a circular block (21); two symmetrically distributed L-shaped dredging blocks (22) are fixedly connected to the annular side wall of the circular block (21); the lower end of the circular block (21) is fixedly connected to a spiral dredging rod (23); and a plurality of conical teeth (24) are fixedly connected to the side walls of the two L-shaped dredging blocks (22) facing the spiral dredging rod (23).

6. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 1, characterized in that: The filtering mechanism comprises two limiting protrusions (25) respectively fixedly connected to the top surface and the bottom surface of the second cavity (6); a circular flow opening (26) is provided on the left inner wall of the second cavity (6); the two limiting protrusions (25) on the same horizontal plane are respectively arranged close to the left and right inner walls of the second cavity (6); a first filter screen (27) and a second filter screen (28) are vertically and sealedly penetrated on the top surface of the second cavity (6) close to the left and right sides; the first filter screen (27) is pressed against the two limiting protrusions (25) on the left and the inner wall of the second cavity (6); the second filter screen (28) is pressed against the two limiting protrusions (25) on the right and the inner wall of the second cavity (6); and the upper ends of the two first filter screens (27) and the second filter screens (28) are fixedly connected to pull blocks (29).

7. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 6, characterized in that: The limiting protrusion (25) and the fixing seat (4) are integrally formed, and the diameter of the filter holes of the second filter screen (28) is smaller than the diameter of the filter holes of the first filter screen (27).

8. The anti-clogging multi-flow fluoroplastic centrifugal pump according to claim 6, characterized in that: The circulation mechanism comprises first circulation tubes (30) respectively arranged on the inner walls of the front and rear sides of the second cavity (6), the two first circulation tubes (30) being arranged close to the limiting protrusion (25) at the lower right side, the inner walls of the front and rear sides of the first cavity (5) close to the second cavity (6) being arranged on the second circulation tubes (31) being arranged on the first cavity (5), and the ends of the three second circulation tubes (31) on the same side located outside the first cavity (5) being arranged on the first cavity (5) being arranged on the second cavity (6), and the two first circulation tubes (30) being arranged in communication with the two pipeline connectors (32), respectively.

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