A self-cleaning axial flow pump

Abstract

The present invention relates to the technical field of axial flow pumps, and discloses a self-cleaning axial flow pump, wherein a water suction port is provided at the bottom of the pump body, a partition plate is fixedly connected to the deflection part of the pump body, a filtering mechanism is movably connected to the bottom of the pump body, a transmission mechanism is fixedly connected to the top of the pump body, a fixed installation mechanism is movably connected to the outer surface of the pump body, a central axis rod is provided inside the pump body, two guide blocks are fixedly connected to the outer surface of the central axis rod, limiting grooves are provided on the front and back sides of the guide blocks, an extension mechanism is movably connected inside the guide blocks, a first motor is started to make the central axis rod drive the lifting block and the moving brush block to rotate inside the pump body, detergent and clean water are poured into the water outlet to automatically clean the inner wall of the pump body, and the filter sleeve can filter impurities in the water source to avoid impurities remaining inside the axial flow pump, and the brush on the connecting rod can brush away impurities in the filter hole.

Description

Technical Field

[0001] The present invention relates to the technical field of axial flow pumps, and more particularly to a self-cleaning axial flow pump. Background Art

[0002] Axial flow pump is a highly efficient fluid conveying equipment, known for its low head and large flow characteristics. It uses a rotating impeller to accelerate and push the fluid along the axial direction. It is widely used in agricultural irrigation, urban drainage, flood control and drainage, and industrial processes. It is an indispensable and important equipment in these fields.

[0003] When the axial flow pump is working, the impeller will rotate, and the blades will generate thrust on the fluid, transferring energy to the fluid, causing the fluid to move forward along the axial direction. The blades will generate high-speed spiral flow in the fluid, thereby forming a low-pressure area between the blades, attracting more fluid into the pump. As the impeller continues to rotate, the fluid is accelerated along the axial direction under the push of the blades, and is further decelerated and pressurized through the guide vanes or diffusers, and finally flows out from the pump outlet.

[0004] Disadvantages of existing axial flow pumps:

[0005] First, due to the low head and large flow rate of axial flow pumps, they are mainly used to transport river water and grassland water for agricultural irrigation, water conservancy projects and urban water supply projects. The extracted water sources often contain impurities, such as small particles, silt, suspended matter, etc. These impurities will enter the pump with the water flow. When cleaning the axial flow pump, the central shaft and impeller need to be disassembled, and the inner surface of the pump body needs to be cleaned with professional tools, which is very inconvenient.

[0006] Second, the water flow will still maintain a high rotation speed when leaving the impeller and reaching the outlet. This part of the rotational kinetic energy cannot be effectively utilized, but will be directly lost, which will lead to a significant reduction in the head and efficiency of the pump. Summary of the invention

[0007] In order to overcome the above defects of the prior art, the present invention provides a self-cleaning axial flow pump to solve the problems existing in the above background technology.

[0008] The present invention provides the following technical solution: a self-cleaning axial flow pump, wherein a water suction port is provided at the bottom of the pump body, a partition plate is fixedly connected to the baffle of the pump body, a filtering mechanism is movably connected to the bottom of the pump body, a transmission mechanism is fixedly connected to the top of the pump body, a fixed installation mechanism is movably connected to the outer surface of the pump body, a central axis rod is provided inside the pump body, two guide blocks are fixedly connected to the outer surface of the central axis rod, limiting grooves are provided on the front and back of the guide blocks, and an extension mechanism is movably connected inside the guide blocks;

[0009] Furthermore, the transmission mechanism includes a first motor, a central shaft, a connecting rod, a brush, a first impeller, a first conical tooth, a second conical tooth, a transmission rod, a rotating shaft, a fixing member and a second impeller, one side of the first motor is fixedly connected to the central shaft, one side of the central shaft is fixedly connected to the first impeller, wherein the blades of the first impeller are flat, which can better guide the liquid to flow along the axial direction, reduce flow resistance and eddy current loss, one end of the outer surface of the central shaft is fixedly connected to the first conical tooth, and the top of the first conical tooth is movably connected to the second conical tooth. The second impeller can be rotated by the cooperation between the first conical teeth and the second conical teeth, so that the liquid obtains additional pressure energy when passing through the second impeller, thereby significantly improving the head of the axial flow pump. The top of the second conical teeth is fixedly connected with a transmission rod, the middle of the transmission rod is movably connected with a rotating shaft, the two sides of the rotating shaft are fixedly connected with fixing parts, and the top of the transmission rod is fixedly connected with the second impeller. By fixing the transmission rod inside the pump body with the fixing parts and the rotating shaft, the pump body can be prevented from shaking when the transmission rod rotates, thereby preventing parts from being damaged.

[0010] Furthermore, the extension mechanism includes a second motor, a first toothless gear, a second toothless gear, a transmission shaft, a first driving rod, a second driving rod, a lifting block, a first auxiliary rod, a connecting piece, a second auxiliary rod, a moving brush block and a limit block. The front side of the second motor is fixedly connected to the first toothless gear, and one side of the first toothless gear is movably connected to the second toothless gear. The arrangement of the first toothless gear and the second toothless gear can provide a mechanism transmission on both sides of the guide block. One side of the second toothless gear is fixedly connected to the transmission shaft, and the arrangement of the transmission shaft can provide a mechanism transmission for the first driving rod and the first auxiliary rod. For supplying power, the outer surface of the transmission shaft is fixedly connected with a first driving rod, the top of the first driving rod is movably connected with a second driving rod, the top of the second driving rod is movably connected with a lifting block, when the first driving rod takes the connection point of the first toothless gear as the origin and moves outward, the second driving rod cooperates with its action to make the lifting block move upward inside the guide block, when the first driving rod moves inward and the second driving rod folds inward, the lifting block moves downward, the outer surface of the transmission shaft is fixedly connected with a first auxiliary rod, the top of the first auxiliary rod is movably connected with a connecting piece, and the top of the connecting piece is fixedly connected with a movable brush block.

[0011] Furthermore, movable brush blocks are provided on both sides of the lifting block, and bristles are installed on the top of the lifting block and the movable brush block. A second auxiliary rod is provided on one side of the first auxiliary rod, and the second auxiliary rod is movably connected with the movable brush block. The inner side of the movable brush block is fixedly connected to a limiting block, and the outer surface of the limiting block is movably connected to a limiting groove. The setting of the limiting groove and the limiting block can limit the moving position of the movable brush block when it moves. When the movable brush block moves the guide block, the lifting block descends to the inside of the guide block and the movable brush block is on the top of the guide block. In this way, when cleaning is not needed, the guide block can play the role of guiding and balancing flow, so that the fluid energy is more evenly distributed in the axial flow pump.

[0012] Furthermore, the filtering mechanism includes a filter sleeve, a mounting rod, a fixing block and a nut. The filter sleeve is fixedly connected to the mounting rod on the other side, the inner surface of the mounting rod is movably connected to the fixing block, the bottom of the fixing block is fixedly connected to the pump body, and the outer surface of the mounting rod is movably connected to the nut.

[0013] Furthermore, a connecting rod is movably connected to one side of the outer surface of the central axis rod, a brush is fixedly connected to the outer surface of the connecting rod, and a filter net is provided on the other side of the brush. The rotation of the central axis rod mainly provides power for the first impeller, and the brush can clean the surface of the filter net through the power provided by the central axis rod, which directly improves the overall efficiency of the mechanism and reduces energy waste.

[0014] Furthermore, the fixed installation mechanism includes a base plate, a first pipe sleeve, a first folding block, a support force plate and a second pipe sleeve, one side of the base plate is fixedly connected to the first pipe sleeve, the inner surface of the first pipe sleeve is movably connected to the pump body, the top of the base plate is movably connected to the first folding block, the top of the first folding block is movably connected to the support force plate, one side of the support force plate is movably connected to the second pipe sleeve, and the inner surface of the second pipe sleeve is movably connected to the pump body.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention starts the second motor to rotate the first toothless gear. Since the first toothless gears are adapted to each other, the second toothless gear starts to rotate. At this time, the transmission shaft drives the first driving rod and the second driving rod to expand outward. As the first driving rod and the second driving rod extend, the lifting block is lifted upward inside the guide block. At this time, the second auxiliary rod connected to the transmission shaft also begins to extend outward and causes the moving brush block to gradually move from the top of the guide block to both sides. At this time, the lifting block moves to the top of the guide block and the moving brush block moves to both sides of the guide block. At this time, the first motor is started to drive the central shaft rod to drive the lifting block and the moving brush block to rotate inside the pump body, and detergent and clean water are poured into the water outlet to automatically clean the inner wall of the pump body.

[0017] 2. The present invention buckles the filter net at the water inlet and places the mounting rod on one side of the fixing block. Then, when the filter net is rotated, one end of the mounting rod is aligned with the mounting hole on the fixing block. Then, the filter net is pulled down and connected with one end of the mounting rod using a nut to complete the installation of the filter net. Then, the connecting rod is inserted into the filter hole in the middle of the filter net and connected with the central axis rod. The filter net can filter impurities in the water source to avoid impurities remaining in the axial flow pump, and the brush on the connecting rod can brush away impurities in the filter hole.

[0018] 3. The present invention makes the first conical teeth rotate along with the rotation of the central shaft. When the first conical teeth rotate, the second conical teeth start to rotate. When the second conical teeth rotate, the transmission rod starts to rotate. The position of the transmission rod can be fixed by setting the fixing member and the rotating shaft to prevent the pump body from shaking and causing damage to parts.

[0019] 4. The present invention places the bottom plate on the ground and uses the first pipe sleeve to cover the pump body, then adjusts the position of the supporting force plate through the first folding block, and then covers the second pipe sleeve on the pump body to fix the axial flow pump through the fixing installation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the pump body of the present invention.

[0022] Figure 3 It is a schematic diagram of the pump body planing surface and filtering mechanism structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the transmission mechanism structure of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the fixed installation mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the guide block structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the extension mechanism structure of the present invention.

[0027] The accompanying drawings are marked as follows: 1. pump body; 101. water outlet; 102. water inlet; 103. partition plate; 2. filter mechanism; 201. filter net; 202. mounting rod; 203. fixing block; 204. nut; 3. transmission mechanism; 301. first motor; 302. middle shaft rod; 3021. connecting rod; 3022. brush; 303. first impeller; 304. first conical teeth; 305. second conical teeth; 306. transmission rod; 307. rotating shaft; 308. fixing piece; 309. second impeller; 4. fixing and mounting mechanism Structure; 401, bottom plate; 402, first sleeve; 403, first folding block; 404, support force plate; 405, second sleeve; 5, guide block; 501, limit groove; 6, extension mechanism; 601, second motor; 602, first toothless gear; 603, second toothless gear; 604, transmission shaft; 605, first driving rod; 606, second driving rod; 607, lifting block; 608, first auxiliary rod; 6081, connecting piece; 6082, second auxiliary rod; 609, moving brush block; 6091, limit block. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The self-cleaning axial flow pump involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] Reference Figure 1-7 The present invention provides a self-cleaning axial flow pump, wherein a water suction port 102 is provided at the bottom of a pump body 1, a water outlet 101 is provided at the top of the pump body 1, a partition plate 103 is fixedly connected to the baffle of the pump body 1, a filtering mechanism 2 is movably connected to the bottom of the pump body 1, a transmission mechanism 3 is fixedly connected to the top of the pump body 1, a fixed installation mechanism 4 is movably connected to the outer surface of the pump body 1, a central axis rod 302 is provided inside the pump body 1, two guide blocks 5 are fixedly connected to the outer surface of the central axis rod 302, limiting grooves 501 are provided on the front and back sides of the guide block 5, and an extension mechanism 6 is movably connected inside the guide block 5.

[0030] In a preferred embodiment, the transmission mechanism 3 includes a first motor 301, a central shaft 302, a connecting rod 3021, a brush 3022, a first impeller 303, a first conical tooth 304, a second conical tooth 305, a transmission rod 306, a rotating shaft 307, a fixing member 308 and a second impeller 309. One side of the first motor 301 is fixedly connected to the central shaft 302, and one side of the central shaft 302 is fixedly connected to the first impeller 303, wherein the blades of the first impeller 303 are flat, which can better guide the liquid to flow along the axial direction, reduce flow resistance and eddy current loss, and one end of the outer surface of the central shaft 302 is fixedly connected to the first conical tooth 304, and the top of the first conical tooth 304 is movable. A second conical tooth 305 is connected, and the second impeller 309 can be rotated through the mutual cooperation between the first conical tooth 304 and the second conical tooth 305, so that the liquid obtains additional pressure energy when passing through the second impeller 309, thereby significantly improving the head of the axial flow pump, the top of the second conical tooth 305 is fixedly connected with a transmission rod 306, the middle part of the transmission rod 306 is movably connected with a rotating shaft 307, both sides of the rotating shaft 307 are fixedly connected with fixing parts 308, and the top of the transmission rod 306 is fixedly connected with the second impeller 309. By using the fixing part 308 and the rotating shaft 307 to fix the transmission rod 306 inside the pump body 1, it can be avoided that the pump body 1 shakes when the transmission rod 306 rotates to avoid damage to parts.

[0031] In a preferred embodiment, the extension mechanism 6 includes a second motor 601, a first toothless gear 602, a second toothless gear 603, a transmission shaft 604, a first driving rod 605, a second driving rod 606, a lifting block 607, a first auxiliary rod 608, a connecting piece 6081, a second auxiliary rod 6082, a moving brush block 609 and a limit block 6091. The front of the second motor 601 is fixedly connected to the first toothless gear 602, and one side of the first toothless gear 602 is movably connected to the second toothless gear 603. The first toothless gear 602 and the second toothless gear 603 are arranged so as to enable the mechanism transmission on both sides of the guide block 5 to extend. The second toothless gear 603 is fixedly connected to the transmission shaft 604 on one side, and the first driving rod 605 is fixedly connected to the transmission shaft 604 on the other side. 05 provides power to the first auxiliary rod 608, the outer surface of the transmission shaft 604 is fixedly connected with the first driving rod 605, the top of the first driving rod 605 is movably connected with the second driving rod 606, the top of the second driving rod 606 is movably connected with the lifting block 607, when the first driving rod 605 takes the connection point of the first toothless gear 602 as the origin and moves outward, the second driving rod 606 cooperates with its action to make the lifting block 607 move upward inside the guide block 5, when the first driving rod 605 moves inward and the second driving rod 606 folds inward, the lifting block 607 moves downward, the outer surface of the transmission shaft 604 is fixedly connected with the first auxiliary rod 608, the top of the first auxiliary rod 608 is movably connected with a connecting piece 6081, and the top of the connecting piece 6081 is fixedly connected with a movable brush block 609.

[0032] In a preferred embodiment, movable brush blocks 609 are provided on both sides of the lifting block 607, and bristles are installed on the tops of the lifting block 607 and the movable brush block 609. A second auxiliary rod 6082 is provided on one side of the first auxiliary rod 608, and the second auxiliary rod 6082 is movably connected to the movable brush block 609. The inner side of the movable brush block 609 is fixedly connected to a limiting block 6091, and the outer surface of the limiting block 6091 is movably connected to the limiting groove 501. The setting of the limiting groove 501 and the limiting block 6091 can limit the moving position of the movable brush block 609 when it moves. When the movable brush block 609 moves the guide block 5, the lifting block 607 descends to the inside of the guide block 5 and the movable brush block 609 is on the top of the guide block 5. In this way, when cleaning is not required, the guide block 5 can play the role of guiding and balancing flow, so that the fluid energy is more evenly distributed in the axial flow pump.

[0033] In a preferred embodiment, the filter mechanism 2 includes a filter sleeve 201, a mounting rod 202, a fixing block 203 and a nut 204. The filter sleeve 201 is fixedly connected to the mounting rod 202 on the other side, the inner surface of the mounting rod 202 is movably connected to the fixing block 203, the bottom of the fixing block 203 is fixedly connected to the pump body 1, and the outer surface of the mounting rod 202 is movably connected to the nut 204.

[0034] In a preferred embodiment, one side of the outer surface of the central axis rod 302 is movably connected to a connecting rod 3021, the outer surface of the connecting rod 3021 is fixedly connected to a brush 3022, and the other side of the brush 3022 is provided with a filter net 201. The rotation of the central axis rod 302 is mainly to provide power for the first impeller 303, and the brush 3022 can clean the surface of the filter net 201 through the power provided by the central axis rod 302, which directly improves the overall efficiency of the mechanism and reduces energy waste.

[0035] In a preferred embodiment, the fixed installation mechanism 4 includes a base plate 401, a first pipe sleeve 402, a first folding block 403, a support force plate 404 and a second pipe sleeve 405, one side of the base plate 401 is fixedly connected to the first pipe sleeve 402, the inner surface of the first pipe sleeve 402 is movably connected to the pump body 1, the top of the base plate 401 is movably connected to the first folding block 403, the top of the first folding block 403 is movably connected to the support force plate 404, one side of the support force plate 404 is movably connected to the second pipe sleeve 405, and the inner surface of the second pipe sleeve 405 is movably connected to the pump body 1.

[0036] The working principle of the present invention is as follows: when in use, the filter net 201 is buckled at the water inlet 102 and the mounting rod 202 is placed on one side of the fixing block 203. Then, when the filter net 201 is rotated, one end of the mounting rod 202 is aligned with the mounting hole on the fixing block 203. Then, the filter net 201 is pulled down and connected with one end of the mounting rod 202 using the nut 204 to complete the installation of the filter net 201. Then, the connecting rod 3021 is inserted into the filter hole in the middle of the filter net 201 and the connecting rod 3021 is connected with the central axis rod 302. Then, the bottom plate 401 is placed on the ground and the first pipe sleeve 402 is used to cover the pump body 1. Then, the first turning The folding block 403 adjusts the position of the supporting force plate 404, and then the second pipe sleeve 405 is put on the pump body 1 to fix the axial flow pump through the fixing installation mechanism 4, and then the first motor 301 is started to make the central shaft rod 302 start to rotate. After the central shaft rod 302 rotates, the first impeller 303 starts to rotate and transmits the water in the water intake area to the water outlet 101 through the channel in the pump body 1. At this time, the connecting rod 3021 rotates with the central shaft rod 302 and drives the brush 3022 to rotate outside the filter sleeve net 201, so as to prevent large impurities from blocking the filter holes on the filter sleeve net 201. At this time, the first conical teeth 304 rotate with the rotation of the central shaft rod 302. When After the first conical teeth 304 rotate, the second conical teeth 305 start to rotate. After the second conical teeth 305 rotate, the transmission rod 306 starts to rotate. The setting of the fixing member 308 and the rotating shaft 307 can fix the position of the transmission rod 306 to prevent the pump body 1 from shaking and causing damage to the parts. At this time, the second impeller 309 installed at the water outlet 101 starts to rotate to increase the flow and pressure of the water outlet 101. When the drainage is completed, the second motor 601 is started to rotate the first toothless gear 602. Since the first toothless gear 602 is adapted to each other, the second toothless gear 603 starts to rotate. At this time, the transmission shaft 604 drives the first drive rod 605 and the second drive rod 606 expands outward, and with the extension of the first driving rod 605 and the second driving rod 606, the lifting block 607 is lifted upward inside the guide block 5. At this time, the second auxiliary rod 6082 connected to the transmission shaft 604 also begins to extend outward and causes the movable brush block 609 to gradually move from the top of the guide block 5 to the sides. At this time, the lifting block 607 moves to the top of the guide block 5 and the movable brush block 609 moves to the sides of the guide block 5. At this time, the first motor 301 is started to make the central axis rod 302 drive the lifting block 607 and the movable brush block 609 to rotate inside the pump body 1, and detergent and clean water are poured into the water outlet 101 to automatically clean the inner wall of the pump body 1.

[0037] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0038] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0039] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cleaning axial flow pump, comprising a pump body (1), characterized in that: The pump body (1) has a water inlet (102) at the bottom, a water outlet (101) at the top, a partition plate (103) fixedly connected to the baffle of the pump body (1), a filtering mechanism (2) movably connected to the bottom of the pump body (1), a transmission mechanism (3) fixedly connected to the top of the pump body (1), a fixed mounting mechanism (4) movably connected to the outer surface of the pump body (1), a central axis rod (302) is provided inside the pump body (1), two guide blocks (5) are fixedly connected to the outer surface of the central axis rod (302), limiting grooves (501) are provided on the front and back sides of the guide blocks (5), and an extension mechanism (6) is movably connected inside the guide blocks (5); The extending mechanism (6) comprises a second motor (601), a first toothless gear (602), a second toothless gear (603), a transmission shaft (604), a first driving rod (605), a second driving rod (606), a lifting block (607), a first auxiliary rod (608), a connecting piece (6081), a second auxiliary rod (6082), a moving brush block (609) and a limiting block (6091); the front side of the second motor (601) is fixedly connected to the first toothless gear (602); one side of the first toothless gear (602) is movably connected to the second toothless gear (603); A transmission shaft (604) is fixedly connected to one side of the second toothless gear (603); a first driving rod (605) is fixedly connected to the outer surface of the transmission shaft (604); a second driving rod (606) is movably connected to the top of the first driving rod (605); a lifting block (607) is movably connected to the top of the second driving rod (606); a first auxiliary rod (608) is fixedly connected to the outer surface of the transmission shaft (604); a connecting piece (6081) is movably connected to the top of the first auxiliary rod (608); and a movable brush block (609) is fixedly connected to the top of the connecting piece (6081); A movable brush block (609) is provided on both sides of the lifting block (607), and bristles are installed on the top of the lifting block (607) and the movable brush block (609). A second auxiliary rod (6082) is provided on one side of the first auxiliary rod (608), and the second auxiliary rod (6082) is movably connected to the movable brush block (609). The inner side of the movable brush block (609) is fixedly connected to a limiting block (6091), and the outer surface of the limiting block (6091) is movably connected to the limiting groove (501).

2. A self-cleaning axial flow pump according to claim 1, characterized in that: The transmission mechanism (3) comprises a first motor (301), a central shaft (302), a connecting rod (3021), a brush (3022), a first impeller (303), first conical teeth (304), second conical teeth (305), a transmission rod (306), a rotating shaft (307), a fixing member (308) and a second impeller (309); one side of the first motor (301) is fixedly connected to the central shaft (302); one side of the central shaft (302) is fixedly connected to the first impeller (303); ), one end of the outer surface of the central axis rod (302) is fixedly connected to a first conical tooth (304), the top of the first conical tooth (304) is movably connected to a second conical tooth (305), the top of the second conical tooth (305) is fixedly connected to a transmission rod (306), the middle of the transmission rod (306) is movably connected to a rotating shaft (307), both sides of the rotating shaft (307) are fixedly connected to fixing members (308), and the top of the transmission rod (306) is fixedly connected to a second impeller (309).

3. A self-cleaning axial flow pump according to claim 1, characterized in that: The filter mechanism (2) comprises a filter sleeve (201), a mounting rod (202), a fixing block (203) and a nut (204); the other side of the filter sleeve (201) is fixedly connected to the mounting rod (202); the inner surface of the mounting rod (202) is movably connected to the fixing block (203); the bottom of the fixing block (203) is fixedly connected to the pump body (1); and the outer surface of the mounting rod (202) is movably connected to the nut (204).

4. A self-cleaning axial flow pump according to claim 1, characterized in that: One side of the outer surface of the central axis rod (302) is movably connected to a connecting rod (3021), the outer surface of the connecting rod (3021) is fixedly connected to a brush (3022), and the other side of the brush (3022) is provided with a filter net (201).

5. A self-cleaning axial flow pump according to claim 1, characterized in that: The fixed installation mechanism (4) comprises a bottom plate (401), a first pipe sleeve (402), a first folding block (403), a support force plate (404) and a second pipe sleeve (405); one side of the bottom plate (401) is fixedly connected to the first pipe sleeve (402); the inner surface of the first pipe sleeve (402) is movably connected to the pump body (1); the top of the bottom plate (401) is movably connected to the first folding block (403); the top of the first folding block (403) is movably connected to the support force plate (404); one side of the support force plate (404) is movably connected to the second pipe sleeve (405); and the inner surface of the second pipe sleeve (405) is movably connected to the pump body (1).

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