Submersible pump water inlet structure with self-cleaning filter screen

Abstract

The utility model discloses a submersible pump water inlet structure with self -cleaning filter screen relates to submersible pump technical field, including submersible pump device ontology, the input of submersible pump device ontology is detachably installed with the protection shell no.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, specifically to a submersible pump inlet structure with a self-cleaning filter. Background Technology

[0002] Submersible pumps, as underwater pumping equipment, are widely used in agricultural irrigation, aquaculture, municipal drainage and other fields. The unobstructedness of their water inlet structure directly affects the pumping efficiency and equipment life. Existing submersible pumps usually have a filter screen installed at the water inlet to intercept impurities such as mud, weeds, and debris in the water, preventing impurities from entering the pump body and causing impeller wear, pipe blockage or motor failure. However, after long-term use, the filter screen of traditional submersible pumps is prone to the accumulation of impurities on its surface. If it is not cleaned in time, it will cause the filter holes to become clogged, thereby reducing the water flow, increasing the pump's energy consumption, and even causing the submersible pump to overload and shut down. Although some submersible pumps have attempted to add self-cleaning structures, they often require additional power sources such as motors and cylinders. This not only increases the manufacturing cost and energy consumption of the equipment, but also increases the risk of underwater failure due to the addition of extra power components, making it difficult to meet the stability requirements of submersible pumps for long-term underwater operation. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a submersible pump inlet structure with a self-cleaning filter, which has the advantages of requiring no additional power, high self-cleaning efficiency, convenient maintenance, and stable operation. It solves the problems of easy clogging of traditional submersible pump filters, the need to stop the pump and disassemble the casing for cleaning, and high maintenance costs, as well as the problems of some self-cleaning submersible pumps relying on an additional power source, which leads to increased manufacturing costs and energy consumption, and high risk of underwater failure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a submersible pump inlet structure with a self-cleaning filter, comprising a submersible pump body, wherein a protective shell is detachably mounted on the input end of the submersible pump body via a flange, a second protective shell is fixedly connected to the right side of the first protective shell, the second protective shell is fixedly connected to an external water pipe via a flange, a filter screen is provided inside the first protective shell, a drive shaft is rotatably mounted inside the first protective shell, and the right end of the drive shaft extends into the interior of the second protective shell, and also includes a vibration cleaning mechanism, which is disposed inside the first protective shell and is used to vibrate and clean the surface of the filter screen; The power recovery assembly is located inside the second protective shell and is used to provide power to the vibration cleaning mechanism; The transmission mechanism is located inside the protective housing and is used to transmit the power generated by the power recovery assembly to the vibration cleaning mechanism; The drive shaft is used in conjunction with the power recovery assembly to drive the transmission mechanism.

[0005] As a preferred embodiment of the present invention, the power recovery assembly includes a turbine, a first shaft bracket, and a second shaft bracket. The tops of the first and second shaft brackets are fixedly installed on the inner wall of the second protective shell. The surfaces of the drive shaft are rotatably installed with the first and second shaft brackets. The turbine is fixedly installed on the right side of the drive shaft surface and is located between the first and second shaft brackets.

[0006] As a preferred embodiment of this utility model, the transmission mechanism includes a first gear, a rotating shaft, a second gear, and a third gear. The first gear is fixedly installed on the left side of the surface of the drive shaft. The rotating shaft is rotatably installed on the left side of the inner wall of the protective shell. The second gear is fixedly installed on the surface of the rotating shaft and meshes with the first gear. The third gear is located below the second gear and meshes with the second gear.

[0007] In a preferred embodiment of this invention, the vibration cleaning mechanism includes a toggle cleaning shaft, a brush, a cam, and a reset assembly. The toggle cleaning shaft is rotatably mounted on the left side of the inner wall of the protective shell. The toggle cleaning shaft is located below the rotating shaft. The gear is fixedly mounted on the surface of the toggle cleaning shaft. The brush is spirally distributed at equal intervals on the surface of the toggle cleaning shaft. Two sets of cams are provided, and the two sets of cams are symmetrically fixedly mounted on the surface of the toggle cleaning shaft. The cams are in contact with the surface of the filter screen. The reset assembly is located below the filter screen and is used to reset the filter screen.

[0008] In a preferred embodiment of this invention, the reset assembly includes a fixing ring, a sliding rod, and a spring. The fixing ring is fixedly installed on the top of the input end of the submersible pump body and located below the interior of the protective shell. Four sets of sliding rods are provided, with the bottom of each set fixedly installed to the top of the fixing ring. The surfaces of the sliding rods are slidably installed with the filter screen. The spring is sleeved on the surface of the sliding rod, with the top of the spring contacting the filter screen and the bottom of the spring contacting the fixing ring.

[0009] As a preferred embodiment of this invention, a retaining ring is fixedly installed on the top of the slide rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model solves the problems of easy clogging of filters, need to stop the machine and disassemble the casing for cleaning, and high maintenance costs of traditional submersible pumps by setting up a submersible pump device body, a protective shell one, a protective shell two, a filter screen, a drive shaft, a vibration cleaning mechanism, a power recovery component and a transmission mechanism. It also solves the problems of some self-cleaning submersible pumps relying on an additional power source, which leads to increased manufacturing costs and energy consumption and high risk of underwater failure.

[0011] This invention, by setting up a power recovery component, can directly utilize the kinetic energy of the incoming water flow to drive the turbine rotation, eliminating the need for additional power sources such as motors and cylinders. This reduces equipment manufacturing costs and operating energy consumption, while also reducing the risk of failure of additional underwater power components, thus meeting the stability requirements of the submersible pump device for long-term underwater operation.

[0012] This invention, by setting up a transmission mechanism, can efficiently transmit the power obtained by the power recovery component to the vibration cleaning mechanism. The meshing transmission of gear one, gear two and gear three can reduce power loss, and the stable support of the rotating shaft for gear two can avoid transmission jamming, ensuring continuous power transmission and providing a reliable power foundation for subsequent filter cleaning operations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the protective shell one and the protective shell two of this utility model; Figure 3 This is a partial structural diagram of the filter screen of this utility model; Figure 4 This is a partial structural diagram of the first and second shaft brackets of this utility model.

[0014] In the diagram: 1. Submersible pump body; 2. Protective shell one; 3. Protective shell two; 4. Filter screen; 5. Turbine; 51. Shaft bracket one; 52. Shaft bracket two; 6. Drive shaft; 61. Gear one; 62. Rotating shaft; 63. Gear two; 64. Gear three; 7. Actuating cleaning shaft; 701. Brush; 71. Cam; 8. Fixing ring; 81. Slide rod; 811. Retaining ring; 82. Spring. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0018] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth. Example

[0019] Reference Figure 1-4 This is the first embodiment of the present utility model, which adopts the following technical solution, including a submersible pump device body 1, a protective shell 2 detachably installed at the input end of the submersible pump device body 1 via a flange, a protective shell 3 fixedly connected to the right side of the protective shell 2, the protective shell 3 fixedly connected to an external water pipe via a flange, a filter screen 4 provided inside the protective shell 2, a drive shaft 6 rotatably installed inside the protective shell 2, and the right end of the drive shaft 6 extending into the interior of the protective shell 3, and also includes a vibration cleaning mechanism, which is provided inside the protective shell 2 and is used to vibrate and clean the surface of the filter screen 4; The power recovery assembly is located inside the protective housing 2 3 and is used to provide power to the vibration cleaning mechanism; The transmission mechanism is located inside the protective shell 2 and is used to transmit the power generated by the power recovery component to the vibration cleaning mechanism; Drive shaft 6 is used in conjunction with the power recovery assembly to drive the transmission mechanism.

[0020] Specifically, when the submersible pump is started, external water enters the system through the second protective shell 3. As the water flows through the interior of the second protective shell 3, it drives the power recovery component to operate. Under the action of the water flow, the power recovery component transmits power to the transmission mechanism inside the first protective shell 2 through the drive shaft 6. After receiving the power, the transmission mechanism further transmits the power to the vibration cleaning mechanism inside the first protective shell 2. Finally, the vibration cleaning mechanism starts under the action of power to clean the filter screen 4 inside the first protective shell 2. The first protective shell 2 is detachably connected to the submersible pump body 1 through a flange, and the second protective shell 3 is adapted to the external water pipe through a flange, which facilitates the subsequent maintenance and replacement of the internal components of the first protective shell 2 and the second protective shell 3. Example

[0021] The second embodiment of this utility model adopts the following technical solution: the power recovery assembly includes a turbine 5, a first shaft bracket 51, and a second shaft bracket 52. The tops of the first shaft bracket 51 and the second shaft bracket 52 are fixedly installed on the inner wall of the second protective shell 3. The surface of the drive shaft 6 is rotatably installed with the first shaft bracket 51 and the second shaft bracket 52. The turbine 5 is fixedly installed on the right side of the surface of the drive shaft 6 and is located between the first shaft bracket 51 and the second shaft bracket 52. The transmission mechanism includes a first gear 61, a rotating shaft 62, a second gear 63, and a third gear 64. The first gear 61 is fixedly installed on the left side of the surface of the drive shaft 6. The rotating shaft 62 is rotatably installed on the left side of the inner wall of the first protective shell 2. The second gear 63 is fixedly installed on the surface of the rotating shaft 62 and meshes with the first gear 61. The third gear 64 is located below the second gear 63 and meshes with the second gear 63.

[0022] Specifically, when the submersible pump is started, the external water flows along the inlet channel of the second protective shell 3. The water flow directly acts on the turbine 5 fixed to the right side of the drive shaft 6, driving the turbine 5 to rotate around the axis of the drive shaft 6. At this time, the drive shaft 6 rotates synchronously under the drive of the turbine 5. Since the top of the shaft bracket 1 51 and the shaft bracket 2 52 are fixed to the inner wall of the second protective shell 3 and are rotatably connected to the surface of the drive shaft 6, they provide stable support for the rotating drive shaft 6, preventing the drive shaft 6 from shifting due to water flow impact or its own rotation. Thus, under the drive of the turbine 5 and the support of the shaft bracket 1 51 and the shaft bracket 2 52, the drive shaft 6 transmits the kinetic energy of the water flow obtained by the turbine 5 to the transmission inside the first protective shell 2. The mechanism completes power recovery and transmission. When the power recovery component transmits power through the drive shaft 6, gear 1 61, which is fixed on the left side surface of the drive shaft 6, rotates synchronously with the drive shaft 6. Since gear 2 63 meshes with gear 1 61, the rotation of gear 1 61 will directly drive gear 2 63 to rotate. Gear 2 63 is fixed on the surface of the rotating shaft 62, which is rotatably installed on the left inner wall of the protective shell 2, so that the rotating shaft 62 will rotate together with gear 2 63. Since gear 3 64 is located below gear 2 63 and meshes with it, the rotation of gear 2 63 will further drive gear 3 64 to rotate, so that gear 3 64 transmits power to the subsequent vibration cleaning mechanism. Example

[0023] The third embodiment of this utility model adopts the following technical solution: the vibration cleaning mechanism includes a rotating cleaning shaft 7, a brush 701, a cam 71, and a reset assembly. The rotating cleaning shaft 7 is rotatably installed on the left side of the inner wall of the protective shell 2. The rotating cleaning shaft 7 is located below the rotating shaft 62. The gear 3 64 is fixedly installed on the surface of the rotating cleaning shaft 7. The brush 701 is spirally and evenly distributed on the surface of the rotating cleaning shaft 7. Two sets of cams 71 are provided, and the two sets of cams 71 are symmetrically fixedly installed on the surface of the rotating cleaning shaft 7. The cams 71 are in contact with the surface of the filter screen 4. The reset assembly is located in the... Below the filter screen 4, and used to reset the filter screen 4, the reset assembly includes a fixing ring 8, a slide rod 81, and a spring 82. The fixing ring 8 is fixedly installed on the top of the input end of the submersible pump device body 1 and located inside the lower part of the protective shell 2. There are four sets of slide rods 81. The bottom of the four sets of slide rods 81 is fixedly installed with the top of the fixing ring 8. The surface of the slide rod 81 is slidably installed with the filter screen 4. The spring 82 is sleeved on the surface of the slide rod 81. The top of the spring 82 is in contact with the filter screen 4, and the bottom of the spring 82 is in contact with the fixing ring 8. A retaining ring 811 is fixedly installed on the top of the slide rod 81.

[0024] Specifically, when gear 64 in the transmission mechanism transmits power, since gear 64 is fixedly installed on the surface of the actuating cleaning shaft 7, it drives the actuating cleaning shaft 7 to rotate around the mounting point on the inner left side of the protective shell 2. When the actuating cleaning shaft 7 rotates, the brushes 701 distributed in a spiral pattern on its surface rotate synchronously, sweeping the surface of the filter screen 4. At the same time, two sets of cams 71 symmetrically fixed on the surface of the actuating cleaning shaft 7 rotate with the actuating cleaning shaft 7. During the rotation, they periodically push the filter screen 4 downward. When the protruding end of the cam 71 faces the filter screen 4, it applies a downward thrust to the filter screen 4. When the protruding end moves away from the filter screen 4, the thrust disappears, and the reset component located below the filter screen 4 pulls the filter screen 4 back to its initial position, forming a coordinated action of sweeping and periodic vibration, thereby completing the cleaning operation of the filter screen 4. When the cams 71 in the vibration cleaning mechanism rotate with the actuating cleaning shaft 7 and push the filter screen 4 downward, the filter screen 4 moves along the surface of the four sets of slide rods 81 towards the filter screen 4. As the filter screen 4 slides downwards, the spring 82 on the surface of the slide rod 81 is compressed and deformed by the pressure of the slide rod 81, storing elastic potential energy. When the cam 71 rotates to the non-protruding end and contacts the filter screen 4, the thrust on the filter screen 4 disappears, the spring 82 releases elastic potential energy, and pushes the filter screen 4 to slide upwards along the surface of the slide rod 81 until it returns to the initial position. Since the fixing ring 8 is fixedly installed at the top of the input end of the submersible pump device body 1 and located inside the lower part of the protective shell 2, it provides stable support for the slide rod 81, ensuring that the slide rod 81 always remains vertical, thereby ensuring the smooth sliding and resetting of the filter screen 4. When the cam 71 in the vibration cleaning mechanism rotates with the actuating cleaning shaft 7 and pushes the filter screen 4 downwards, the filter screen 4 slides downwards along the surface of the four sets of slide rods 81. The spring 82 on the surface of the slide rod 81 is compressed and deformed by the pressure of the filter screen 4, storing elastic potential energy simultaneously. At this time, the retaining ring 811 fixedly installed at the top of the slide rod 81 will limit the upward limit position of the filter screen 4.

[0025] 1. Energy recovery start-up When the submersible pump unit 1 is started, the external water enters the system through the protective shell 2 3 connected to the external water pipe flange under the suction of the pump body. When the water flows through the inside of the protective shell 2 3, it directly impacts the turbine 5 fixed on the right side of the drive shaft 6, pushing the turbine 5 to rotate around the axis of the drive shaft 6. At this time, the shaft bracket 1 51 and the shaft bracket 2 52 are both fixed to the inner wall of the protective shell 2 3 to form a stable support for the drive shaft 6, preventing the drive shaft 6 from shifting due to the impact of the water flow. The drive shaft 6 rotates synchronously with the turbine 5, thereby converting the kinetic energy of the water into mechanical transmission power and completing the power recovery. 2. Power transmission The left end of the drive shaft 6 extends into the interior of the protective shell 2. The gear 61 fixed on its surface rotates synchronously with the drive shaft 6. Since the gear 63 is fixed to the inner wall of the protective shell 2 and meshes with the rotating shaft 62, the rotation of the gear 61 drives the gear 63 and the rotating shaft 62 to rotate. The gear 64 (fixed to the surface of the agitating cleaning shaft 7) meshing with the gear 63 is driven to rotate, thereby transmitting power from the drive shaft 6 to the agitating cleaning shaft 7 of the vibration cleaning mechanism. 3. Filter cleaning Driven by gear 364, the cleaning shaft 7 rotates around the inner wall of the protective shell 2, and the brush 701 and cam 71 on its surface operate synchronously: Spiral brushes 701, evenly distributed, rotate with the shaft to sweep the surface of the filter screen 4 inside the protective shell 2 in all directions, directly removing the attached fine impurities. Two sets of symmetrically fixed cams 71 rotate with the shaft. When the protruding end of the cam 71 faces the filter screen 4, it pushes the filter screen 4 downward, forcing the filter screen 4 to slide downward along the lower slide bar 81. 4. Filter reset and circulation cleaning When the filter screen 4 slides downward, the spring 82, which is sleeved on the surface of the slide rod 81, is squeezed and deformed by contacting the filter screen 4 at the top and the fixed ring 8 at the bottom, storing elastic potential energy. When the protruding end of the cam 71 rotates away from the filter screen 4, the thrust disappears, the spring 82 releases the elastic potential energy, and pushes the filter screen 4 to return to its original position along the slide rod 81. At the same time, the retaining ring 811 at the top of the slide rod 81 restricts the filter screen 4 from sliding excessively upward, ensuring that it accurately returns to its initial position. In this way, the filter screen 4 vibrates under the cyclic action of the cam 71 pushing down and the spring 82 returning to its original position, shaking off stubborn impurities, and forming a synergistic cleaning effect with the brush 701 sweeping. 5. External protection The protective shell 1 2 is detachably connected to the submersible pump body 1 via a flange, and the protective shell 2 3 is adapted to the external water pipe via a flange, which facilitates the subsequent maintenance and replacement of internal components such as turbine 5, filter screen 4, and actuation cleaning shaft 7. The whole process does not require an additional power source and relies on the inlet water flow to achieve self-cleaning, which not only ensures smooth water intake for the submersible pump, but also reduces maintenance costs and failure risks.

[0026] In summary, by combining the submersible pump unit body, protective shell one, protective shell two, filter screen, drive shaft, vibration cleaning mechanism, power recovery component and transmission mechanism, the problems of easy clogging of filter screens, need to stop the machine and disassemble the shell for cleaning, and high maintenance costs of traditional submersible pumps are solved. In addition, the problems of some self-cleaning submersible pumps relying on an additional power source, which leads to increased manufacturing costs and energy consumption and high risk of underwater failure are also solved.

[0027] The submersible pump device body, turbine, gear one, gear two, gear three, cam and spring used in this application can be additionally equipped with protective measures of common knowledge in this technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, etc., which are commonly used by those skilled in the art.

[0028] It should be noted that the submersible pump body, turbine, gear one, gear two, gear three, cam and spring are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0029] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0030] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0031] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A submersible pump inlet structure with a self-cleaning filter, comprising a submersible pump body (1), wherein a protective shell (2) is detachably mounted on the input end of the submersible pump body (1) via a flange, a protective shell (3) is fixedly connected to the right side of the protective shell (2), the protective shell (3) is fixedly connected to an external water pipe via a flange, a filter screen (4) is provided inside the protective shell (2), and a drive shaft (6) is rotatably mounted inside the protective shell (2), with the right end of the drive shaft (6) extending into the interior of the protective shell (3), characterized in that: It also includes a vibration cleaning mechanism, which is located inside the protective housing (2) and is used to vibrate and clean the surface of the filter screen (4); The power recovery assembly is located inside the second protective shell (3) and is used to provide power to the vibration cleaning mechanism; The transmission mechanism is located inside the protective shell (2) and is used to transmit the power generated by the power recovery assembly to the vibration cleaning mechanism; The drive shaft (6) is used in conjunction with the power recovery assembly to drive the transmission mechanism.

2. The submersible pump inlet structure with a self-cleaning filter according to claim 1, characterized in that: The power recovery assembly includes a turbine (5), a first shaft bracket (51) and a second shaft bracket (52). The tops of the first shaft bracket (51) and the second shaft bracket (52) are fixedly installed on the inner wall of the second protective shell (3). The surface of the drive shaft (6) is rotatably installed with the first shaft bracket (51) and the second shaft bracket (52). The turbine (5) is fixedly installed on the right side of the surface of the drive shaft (6) and is located between the first shaft bracket (51) and the second shaft bracket (52).

3. The submersible pump inlet structure with a self-cleaning filter according to claim 1, characterized in that: The transmission mechanism includes gear one (61), rotating shaft (62), gear two (63) and gear three (64). Gear one (61) is fixedly installed on the left side of the surface of the drive shaft (6). The rotating shaft (62) is rotatably installed on the left side of the inner wall of the protective shell one (2). Gear two (63) is fixedly installed on the surface of the rotating shaft (62). Gear two (63) meshes with gear one (61). Gear three (64) is located below gear two (63) and meshes with gear two (63).

4. The submersible pump inlet structure with a self-cleaning filter according to claim 3, characterized in that: The vibration cleaning mechanism includes a toggle cleaning shaft (7), a brush (701), a cam (71), and a reset assembly. The toggle cleaning shaft (7) is rotatably mounted on the left side of the inner wall of the protective shell (2). The toggle cleaning shaft (7) is located below the rotating shaft (62). The gear (64) is fixedly mounted on the surface of the toggle cleaning shaft (7). The brush (701) is spirally distributed at equal intervals on the surface of the toggle cleaning shaft (7). There are two sets of cams (71). The two sets of cams (71) are symmetrically fixedly mounted on the surface of the toggle cleaning shaft (7). The cams (71) are in contact with the surface of the filter screen (4). The reset assembly is located below the filter screen (4) and is used to reset the filter screen (4).

5. The submersible pump inlet structure with a self-cleaning filter according to claim 4, characterized in that: The reset assembly includes a fixing ring (8), a slide rod (81), and a spring (82). The fixing ring (8) is fixedly installed on the top of the input end of the submersible pump body (1) and located inside the protective shell (2). There are four sets of slide rods (81). The bottom of the four sets of slide rods (81) is fixedly installed with the top of the fixing ring (8). The surface of the slide rod (81) is slidably installed with the filter screen (4). The spring (82) is sleeved on the surface of the slide rod (81). The top of the spring (82) is in contact with the filter screen (4), and the bottom of the spring (82) is in contact with the fixing ring (8).

6. The submersible pump inlet structure with a self-cleaning filter according to claim 5, characterized in that: A retaining ring (811) is fixedly installed on the top of the slide bar (81).

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