Sand blocking prevention and self-cleaning deep well submersible pump

Abstract

This invention discloses a self-cleaning deep well submersible pump designed to prevent sand clogging, relating to the field of submersible pump technology. It includes a drive mechanism; an output mechanism located at the top of the drive mechanism; and a cleaning mechanism located on the outer surface of the drive mechanism for cleaning. This invention achieves highly efficient sand clogging prevention by utilizing multi-stage filtration and dynamic scraping in synergy. A multi-stage filtration structure, consisting of coarse and fine filter screens, intercepts water entering the pump body step by step, effectively separating sand particles of different sizes. Simultaneously, driven by the drive assembly, a corrugated scraper continuously slides along the outer surface of the coarse filter screen, periodically contacting and separating with the screen surface using its corrugated profile, scraping away sand and debris adhering to the filter screen in real time, preventing rapid clogging of the filter screen pores. This dynamic scraping mechanism, combined with multi-stage filtration, gives the filter assembly self-cleaning capabilities, reducing the risk of sand particles entering the pump body at the source.

Description

Technical Field

[0001] This invention relates to the field of submersible pump technology, and specifically to a deep well submersible pump with anti-sand clogging and self-cleaning function. Background Technology

[0002] Submersible pumps are key water-lifting devices widely used in groundwater resource extraction, agricultural irrigation, and industrial water supply. They typically consist of a submersible motor and a multi-stage impeller. During operation, the motor drives the impeller to rotate at high speed, lifting the water source at the bottom of the well through the suction port to the surface water delivery system. In deep well water extraction operations, since underground aquifers often contain sand particles and suspended solids of different sizes, the pump body inevitably faces the problem of sand particles intruding into the flow channel during operation.

[0003] In the existing technology, the submersible pump structure that uses a single filter screen for sand prevention is prone to rapid clogging by sand particles, which leads to increased pump suction resistance and a significant decrease in water lifting efficiency. After clogging, the pump needs to be shut down for cleaning, affecting water supply operations and increasing maintenance costs. At the same time, fine sand particles that pass through the filter screen will still gradually accumulate on the impeller surface and at the bends of the flow channel. Over time, this will change the dynamic balance of the impeller, aggravate bearing wear, and even cause jamming failure, seriously affecting the reliability and service life of the pump. Summary of the Invention

[0004] This invention provides a deep well submersible pump with anti-sand clogging and self-cleaning function to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A deep well submersible pump with anti-sand clogging and self-cleaning function includes a drive mechanism; an output mechanism disposed on the top of the drive mechanism; and a cleaning mechanism disposed on the outer surface of the drive mechanism for cleaning. The drive mechanism includes a drive component and a filter component disposed inside the drive component. The output mechanism includes an output component disposed on the outer surface of the drive mechanism and an auxiliary extraction component disposed inside the output component. The cleaning mechanism includes a connecting component disposed on the outer surface of the drive mechanism and a cleaning component disposed on the outer surface of the connecting component.

[0006] A further improvement of the technical solution of the present invention is that: the drive assembly includes a sealed housing, a connecting flange is fixedly connected to the top of the sealed housing, a coarse filter screen is fixedly connected to the outer surface of the connecting flange, a waterproof motor is fixedly connected to the top of the connecting flange, the waterproof motor is disposed inside the sealed housing, and an active impeller is detachably connected to the drive end of the waterproof motor. After the waterproof motor is started, its drive end drives the active impeller to rotate, and the rotation of the active impeller generates suction, which draws external well water into the pump body through the coarse filter screen. The sealed housing seals and protects the waterproof motor to prevent well water from entering the motor.

[0007] A further improvement of the technical solution of the present invention is that: the filter assembly includes a coarse filter screen, the outer surface of the coarse filter screen is fixedly connected to the outer surface of the connecting flange, and a fine filter screen is fixedly connected to the inner wall surface of the connecting flange. Under the suction force generated by the active impeller, the well water first flows through the coarse filter screen, which initially intercepts and filters the large-diameter sand and gravel particles carried in the well water. Then, the water flows through the coarse filter screen and enters the interior. The fine filter screen performs secondary fine filtration on the remaining small and medium-diameter sand particles in the water flow. The clean water after two stages of filtration enters the internal flow channel of the pump body.

[0008] A further improvement of the technical solution of the present invention is that: a lower sealing bearing seat is fixedly connected to the outer surface of the connecting flange, a lower rolling wheel is rotatably connected to the inner wall of the lower sealing bearing seat, a lower sealing ring plate is fixedly connected to the outer surface of the lower rolling wheel, the lower rolling wheel can rotate freely under the support of the lower sealing bearing seat, the lower sealing ring plate rotates synchronously with the lower rolling wheel, and the lower sealing bearing seat seals the rotating part to prevent unfiltered water from directly seeping into the pump body from the bottom gap.

[0009] A further improvement of the technical solution of the present invention is that: a corrugated scraper is fixedly connected to the outer surface of the lower sealing ring plate, the outer surface of the corrugated scraper is slidably connected to the outer surface of the coarse filter screen, an upper sealing ring plate is fixedly connected to the top of the corrugated scraper, an upper rolling wheel is fixedly connected to the top of the upper sealing ring plate, and an upper sealing bearing seat is rotatably connected to the outer surface of the upper rolling wheel. When the pump body is running and the water flow continuously impacts, the corrugated scraper slides circumferentially around the outer surface of the coarse filter screen. During the sliding process, the corrugated profile of the corrugated scraper periodically contacts and separates from the surface of the coarse filter screen, thereby... The sand and debris adhering to the outer surface of the coarse filter screen are scraped off. The upper sealing ring plate and the upper rolling wheel, together with the upper sealing bearing seat, provide rotational support and sliding seal for the upper end of the scraper assembly, ensuring that the corrugated scraper can smoothly and continuously scrape along the surface of the coarse filter screen. The clean water filtered by the coarse and fine filter screens enters the interior of the output connection cover under the push of the active impeller. The water flows upward along the inner cavity of the output connection cover, and after being collected by the output sealing pipe, it is discharged from the output connection valve to the external water supply pipeline. The output sealing pipe seals and guides the output water flow to prevent leakage during the output process.

[0010] A further improvement of the technical solution of the present invention is that: the output component includes an output connection cover, one end of the output connection cover is fixedly connected to one end of the coarse filter screen, the outer surface of the output connection cover is fixedly connected to the inner wall of the upper sealing bearing seat, an output sealing pipe is fixedly connected to the top of the output connection cover, and an output connection valve is fixedly connected to the top of the output sealing pipe. The clean water filtered by the coarse filter screen and the fine filter screen enters the interior of the output connection cover under the push of the active impeller. The water flows upward along the inner cavity of the output connection cover, and after being collected by the output sealing pipe, it is discharged from the output connection valve to the external water supply pipeline.

[0011] A further improvement of the technical solution of the present invention is that: the auxiliary extraction component includes a driven impeller, which is disposed inside the output connection cover. The inner wall surface of the driven impeller is fixedly connected to the outer surface of the drive end of the waterproof motor. Blades are fixedly connected to the outer surface of the driven impeller. A magnetic conduction ring is disposed on the outer side of the blades and fixedly connected to the inner wall of the output connection cover. An electromagnet outer ring is fixedly connected to the outer surface of the output connection cover. The drive end of the waterproof motor simultaneously drives the driven impeller to rotate. The driven impeller drives the blades to rotate synchronously inside the output connection cover, generating a secondary pushing force on the water flow entering the output connection cover, thereby enhancing the output pressure and flow rate of the water flow. At the same time, the electromagnet outer ring generates an alternating magnetic field after being energized. This magnetic field is transmitted to the inside of the output connection cover through the magnetic conduction ring, generating a magnetic disturbance effect on the sand particles in the blade area.

[0012] A further improvement of the technical solution of the present invention is as follows: a limiting guide rail is fixedly connected to the inner wall surface of the blade, an impact roller is slidably connected to the inner wall of the limiting guide rail, and rollers are provided at both ends of the impact roller. The outer surfaces of the blade and the limiting guide rail are slidably connected to the two ends of the impact roller through the rollers. A permanent magnet is fixedly connected to the inner surface of the impact roller, a buffer spring column is fixedly connected to the inner wall surface of the blade, and an anti-collision pad is fixedly connected to the inner wall surface of the blade. When the blade rotates with the driven impeller, the impact roller slides outward along the limiting guide rail under the action of centrifugal force. At the same time, the permanent magnet inside the impact roller is subjected to the alternating magnetic force transmitted by the magnetic conduction ring, causing the impact roller to generate reciprocating vibration during the sliding process. The rollers at both ends of the impact roller roll along the surface of the blade and the limiting guide rail, reducing the sliding friction resistance. When the impact roller slides to the end of the guide rail, it contacts the anti-collision pad for buffering. The buffer spring column elastically limits the sliding stroke of the impact roller. The reciprocating vibration and sliding of the impact roller generate continuous mechanical disturbance to the blade surface and the inner wall of the flow channel, preventing sand particles from depositing and adhering on the blade surface.

[0013] A further improvement of the technical solution of the present invention is that: the connecting component includes an L-shaped bracket, one end of which is fixedly connected to the outer surface of the drive end of the waterproof motor; a limiting slide rod is slidably connected to the inner wall of the L-shaped bracket; a telescopic waterproof cover is sleeved on the outer surface of the limiting slide rod; a spring is sleeved on the outer surface of the limiting slide rod; one end of the spring is fixedly connected to the outer surface of the L-shaped bracket; a permanent magnet is fixedly connected to the outer surface of the L-shaped bracket; the drive end of the waterproof motor drives the L-shaped bracket to rotate synchronously; the limiting slide rod slides radially along the inner wall of the L-shaped bracket; the telescopic waterproof cover extends and retracts synchronously with the extension and retraction of the limiting slide rod, providing sealing protection for the limiting slide rod and the spring; the spring provides elastic restoring force during the sliding of the limiting slide rod; and the permanent magnet generates magnetic force as the L-shaped bracket rotates.

[0014] A further improvement of the technical solution of the present invention is that: the cleaning component includes a cleaning brush, the outer surface of the cleaning brush is fixedly connected to the outer surface of the limiting slide bar, the outer surface of the cleaning brush is fixedly connected to one end of the spring, and a permanent magnet with the same pole as the permanent magnet on the outer surface of the spring is also fixedly connected to the outer surface of the cleaning brush. A cleaning burr is fixedly connected to the outer surface of the cleaning brush. When the L-shaped bracket rotates, it drives the cleaning brush to rotate together. Under the action of centrifugal force, the cleaning brush extends radially outward through the limiting slide bar, so that the cleaning burr is tightly against the outer surface of the coarse filter screen for rotating brushing. At the same time, the permanent magnet on the cleaning brush and the permanent magnet on the L-shaped bracket generate a continuous repulsive force with the same pole, so that the cleaning brush generates high-frequency axial micro-amplitude vibration during rotation, which enhances the peeling effect of the cleaning burr on the sand and dirt on the outer surface of the coarse filter screen. The spring provides buffering and reset function during the extension and retraction of the cleaning brush. The telescopic waterproof cover provides dynamic sealing protection for the limiting slide bar and the spring to prevent sand particles in the well water from intruding into the sliding mating surface.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: 1. This invention provides a deep well submersible pump with anti-sand clogging and self-cleaning function. It utilizes multi-stage filtration and dynamic scraping in synergy to achieve highly efficient anti-sand clogging. A multi-stage filtration structure, consisting of coarse and fine filter screens, intercepts water entering the pump body step by step, effectively separating sand particles of different sizes. Simultaneously, driven by the drive assembly, a corrugated scraper continuously slides along the outer surface of the coarse filter screen. Its corrugated profile forms periodic contact and separation with the screen surface, scraping away sand particles and debris adhering to the filter screen in real time, preventing rapid clogging of the screen pores. This dynamic scraping mechanism, combined with multi-stage filtration, gives the filter assembly self-cleaning capabilities, reducing the risk of sand particles entering the pump body at the source and significantly improving the long-term operational stability of the submersible pump in sandy water.

[0016] 2. This invention provides a deep well submersible pump with anti-sand clogging and self-cleaning function. The invention features an impact roller with a permanent magnet inside the output assembly. Under the constraint of the limiting guide rail, the impact roller can slide back and forth along the blade surface. When the blade rotates with the driven impeller, the impact roller is subjected to centrifugal force and alternating magnetic force generated by the magnetic conduction ring and the outer ring of the electromagnet, forming a periodic radial displacement. This generates controllable impact and vibration on the blade and the inner wall of the flow channel. This mechanical disturbance can effectively disrupt the deposition tendency of sand particles in the water flow boundary layer, prevent sand particles from adhering and accumulating on the impeller and the inner wall of the flow channel, and at the same time assist in breaking up the already formed loose sand clumps, allowing them to be smoothly discharged with the water flow. This structure does not rely on external power input, but only utilizes the rotational kinetic energy of the pump body and magnetic coupling to achieve active anti-clogging maintenance of the internal flow channel.

[0017] 3. This invention provides a deep well submersible pump with anti-sand clogging and self-cleaning function. The invention has an L-shaped bracket and a limiting slide bar at the drive end. The cleaning brush is connected to the end of the slide bar by a spring and a permanent magnet. When the waterproof motor drives the bracket to rotate, the cleaning brush extends radially under the action of centrifugal force, so that the cleaning bristles are tightly attached to the outer surface of the coarse filter screen for rotating brushing, actively removing the sand and dirt accumulated on the outside of the filter screen. At the same time, the permanent magnets arranged with the same pole opposite each other generate a continuous repulsive force, so that the cleaning brush generates high-frequency micro-amplitude axial vibration during rotation, which enhances the ability of the bristles to peel off stubborn sand and dirt. The telescopic waterproof cover seals and protects the slide bar and spring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the present invention. Figure 3 This is a partial structural diagram of the drive mechanism of the present invention; Figure 4 This is a schematic diagram of the drive component structure of the present invention; Figure 5 This is a schematic diagram of the filter assembly structure of the present invention; Figure 6 This is a schematic diagram of the output mechanism structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the blade of the present invention; Figure 8 This is a schematic diagram of the internal structure of the impact roller of the present invention; Figure 9 This is a schematic diagram of the cleaning mechanism structure of the present invention.

[0019] In the diagram: 1. Drive mechanism; 11. Sealing housing; 12. Connecting flange; 13. Wave scraper; 14. Coarse filter screen cover; 15. Fine filter screen cover; 16. Waterproof motor; 17. Lower sealing ring plate; 18. Lower rolling wheel; 19. Upper sealing bearing seat; 110. Upper rolling wheel; 111. Upper sealing ring plate; 112. Drive impeller; 113. Lower sealing bearing seat; 2. Output mechanism; 21. Output connecting cover; 22. Output sealing pipe 23. Output connection valve; 24. Electromagnet outer ring; 25. Magnetic conduction ring; 26. Driven impeller; 27. Blade; 28. Limit guide rail; 29. ​​Buffer spring column; 210. Impact roller; 211. Roller; 212. Permanent magnet; 213. Anti-collision pad; 3. Cleaning mechanism; 31. L-shaped bracket; 32. Limit slide bar; 33. Telescopic waterproof cover; 34. Spring; 35. Permanent magnet sheet; 36. Cleaning brush; 37. Deburring. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to embodiments: Example 1: As Figures 1 to 9 As shown, the present invention provides a deep well submersible pump for sand prevention and self-cleaning, comprising a drive mechanism 1, an output mechanism 2 disposed on the top of the drive mechanism 1, and a cleaning mechanism 3 disposed on the outer surface of the drive mechanism 1 for cleaning. The drive mechanism 1 includes a drive assembly and a filter assembly disposed inside the drive assembly; the output mechanism 2 includes an output assembly disposed on the outer surface of the drive mechanism 1 and an auxiliary extraction assembly disposed inside the output assembly; the cleaning mechanism 3 includes a connecting assembly disposed on the outer surface of the drive mechanism 1 and a cleaning assembly disposed on the outer surface of the connecting assembly.

[0021] Among them, such as Figures 3 to 5As shown, the drive assembly includes a sealed housing 11, a connecting flange 12 fixedly connected to the top of the sealed housing 11, a coarse filter screen 14 fixedly connected to the outer surface of the connecting flange 12, and a waterproof motor 16 fixedly connected to the top of the connecting flange 12. The waterproof motor 16 is located inside the sealed housing 11, and a drive impeller 112 is detachably connected to the drive end of the waterproof motor 16. After the waterproof motor 16 is started, its drive end drives the drive impeller 112 to rotate. The rotation of the drive impeller 112 generates suction, drawing external well water into the pump body through the coarse filter screen 14. The sealed housing 11 seals and protects the waterproof motor 16, preventing well water from entering the motor. The filter assembly includes a coarse filter screen 14, the outer surface of which is fixedly connected to the outer surface of the connecting flange 12. A fine filter screen 15 is fixedly connected to the inner wall surface of the connecting flange 12. Under the suction force generated by the active impeller 112, the well water first flows through the coarse filter screen 14, which initially intercepts and filters large-diameter sand and gravel particles carried in the well water. Then, the water flows through the connecting flange 12 and enters the interior, where the fine filter screen 15 performs secondary fine filtration on the remaining small and medium-diameter sand particles in the water flow. The clean water after two stages of filtration enters the internal flow channel of the pump body. A lower sealing bearing seat 113 is fixedly connected to the outer surface of the connecting flange 12. A lower rolling wheel 18 is rotatably connected to the inner wall of the sealed bearing housing 113. A lower sealing ring plate 17 is fixedly connected to the outer surface of the lower rolling wheel 18. The lower rolling wheel 18 can rotate freely under the support of the lower sealed bearing housing 113. The lower sealing ring plate 17 rotates synchronously with the lower rolling wheel 18. The lower sealed bearing housing 113 seals the rotating parts to prevent unfiltered water from directly seeping into the pump body through the bottom gap. A corrugated scraper 13 is fixedly connected to the outer surface of the lower sealing ring plate 17. The outer surface of the corrugated scraper 13 is slidably connected to the outer surface of the coarse filter screen 14. An upper sealing ring plate 111 is fixedly connected to the top of the corrugated scraper 13. The top of 11 is fixedly connected to an upper rolling wheel 110, and the outer surface of the upper rolling wheel 110 is rotatably connected to an upper sealing bearing seat 19. After the waterproof motor 16 is started, the corrugated scraper 13 slides circumferentially around the outer surface of the coarse filter screen 14. During the sliding process, the corrugated profile of the corrugated scraper 13 periodically contacts and separates from the surface of the coarse filter screen 14, scraping off the sand and debris adhering to the outer surface of the coarse filter screen 14. The upper sealing ring plate 111 and the upper rolling wheel 110, together with the upper sealing bearing seat 19, provide rotational support and sliding seal for the upper end of the scraper assembly, ensuring that the corrugated scraper 13 performs a smooth and continuous scraping action along the surface of the coarse filter screen 14.

[0022] Example 2: Figure 2 , Figures 6 to 8As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the output component includes an output connection cover 21, one end of which is fixedly connected to one end of the coarse filter screen 14, the outer surface of the output connection cover 21 is fixedly connected to the inner wall of the upper sealing bearing seat 19, an output sealing pipe 22 is fixedly connected to the top of the output connection cover 21, and an output connection valve 23 is fixedly connected to the top of the output sealing pipe 22. The clean water filtered by the coarse filter screen 14 and the fine filter screen 15 enters the interior of the output connection cover 21 under the push of the active impeller 112. The water flows upward along the inner cavity of the output connection cover 21, is collected by the output sealing pipe 22, and is discharged from the output connection valve 23 to the external water supply pipeline. The sealing pipe 22 seals and guides the output water flow to prevent leakage during the output process. The auxiliary extraction component includes a driven impeller 26, which is located inside the output connection cover 21. The inner wall surface of the driven impeller 26 is fixedly connected to the outer surface of the drive end of the waterproof motor 16. Blades 27 are fixedly connected to the outer surface of the driven impeller 26. A magnetic conduction ring 25, which is fixedly connected to the inner wall of the output connection cover 21, is provided on the outer side of the blades 27. An electromagnet outer ring 24 is fixedly connected to the outer surface of the output connection cover 21. The drive end of the waterproof motor 16 simultaneously drives the driven impeller 26 to rotate, and the driven impeller 26 drives the blades 27 to rotate synchronously inside the output connection cover 21, generating a secondary thrust on the water flow entering the output connection cover 21. The electromagnet delivers power, increasing the output pressure and flow rate of the water. Simultaneously, the electromagnet's outer ring 24 generates an alternating magnetic field when energized. This magnetic field is transmitted to the inside of the output connection cover 21 via the magnetic conduction ring 25, causing magnetic disturbance to the sand particles in the blade 27 area. A limit guide rail 28 is fixedly connected to the inner wall surface of the blade 27, and an impact roller 210 is slidably connected to the inner wall of the limit guide rail 28. Rollers 211 are provided at both ends of the impact roller 210. The outer surfaces of the blade 27 and the limit guide rail 28 are slidably connected to the two ends of the impact roller 210 via the rollers 211. A permanent magnet 212 is fixedly connected to the inner surface of the impact roller 210. A buffer spring column 29 is fixedly connected to the inner wall surface of the blade 27, and an anti-collision pad 21 is fixedly connected to the inner wall surface of the blade 27. 3. When the blade 27 rotates with the driven impeller 26, the impact roller 210 slides outward along the limiting guide rail 28 under the action of centrifugal force. At the same time, the permanent magnet 212 inside the impact roller 210 is subjected to the alternating magnetic force transmitted by the magnetic conduction ring 25, causing the impact roller 210 to generate reciprocating vibration during the sliding process. The rollers 211 at both ends of the impact roller 210 roll along the surface of the blade 27 and the limiting guide rail 28 to reduce the sliding friction resistance. When the impact roller 210 slides to the end of the guide rail, it contacts the anti-collision pad 213 for buffering. The buffer spring column 29 elastically limits the sliding stroke of the impact roller 210. The reciprocating vibration and sliding of the impact roller 210 generate continuous mechanical disturbance on the surface of the blade 27 and the inner wall of the flow channel, preventing sand particles from depositing and adhering on the surface of the blade 27.

[0023] Example 3: As Figure 3 , Figure 4 and Figure 9 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the connecting assembly includes an L-shaped bracket 31, one end of which is fixedly connected to the outer surface of the drive end of the waterproof motor 16; a limiting slide rod 32 is slidably connected to the inner wall of the L-shaped bracket 31; a telescopic waterproof cover 33 is sleeved on the outer surface of the limiting slide rod 32; a spring 34 is sleeved on the outer surface of the limiting slide rod 32; one end of the spring 34 is fixedly connected to the outer surface of the L-shaped bracket 31; and a permanent... The permanent magnet 35 and the drive end of the waterproof motor 16 drive the L-shaped bracket 31 to rotate synchronously. The limiting slide rod 32 slides radially along the inner wall of the L-shaped bracket 31. The telescopic waterproof cover 33 extends and retracts synchronously with the extension and retraction of the limiting slide rod 32, sealing and protecting the limiting slide rod 32 and the spring 34. The spring 34 provides elastic restoring force during the sliding of the limiting slide rod 32. The permanent magnet 35 generates magnetic force as the L-shaped bracket 31 rotates. The cleaning assembly includes a cleaning brush 36, the outer surface of which is flush with the limiting slide rod. The outer surface of the cleaning brush 36 is fixedly connected to one end of the spring 34. The outer surface of the cleaning brush 36 is also fixedly connected to a permanent magnet 35 with the same pole as the permanent magnet 35 on the outer surface of the spring 34. The outer surface of the cleaning brush 36 is fixedly connected to a deburring 37. When the L-shaped bracket 31 rotates, it drives the cleaning brush 36 to rotate together. Under the action of centrifugal force, the cleaning brush 36 extends radially outward through the limiting slide bar 32, so that the deburring 37 tightly abuts against the outer surface of the coarse filter screen 14 for rotating brushing. At the same time, the permanent magnet 35 on the cleaning brush 36 and the permanent magnet 35 on the L-shaped bracket 31 generate a continuous repulsive force with the same pole, so that the cleaning brush 36 generates high-frequency axial micro-vibration during rotation, which enhances the peeling effect of the deburring 37 on the outer surface of the coarse filter screen 14. The spring 34 provides buffering and reset during the extension and retraction of the cleaning brush 36. The telescopic waterproof cover 33 provides dynamic sealing protection for the limiting slide bar 32 and the spring 34 to prevent sand particles in the well water from entering the sliding mating surface.

[0024] The working principle of this anti-sand-clogging self-cleaning deep well submersible pump will be explained in detail below.

[0025] After the waterproof motor 16 is started, its drive end simultaneously drives the active impeller 112, the driven impeller 26, and the L-shaped bracket 31 to rotate synchronously. The rotation of the active impeller 112 generates suction, drawing external well water through the coarse filter screen 14. The coarse filter screen 14 intercepts large-diameter sand and gravel. Subsequently, the water flows through the inside of the connecting flange 12 and undergoes secondary fine filtration through the fine filter screen 15 to remove residual small and medium-diameter sand particles. The clean water enters the internal flow channel of the pump body. At the same time, the corrugated scraper 13 slides circumferentially around the outer surface of the coarse filter screen 14. Its corrugated profile periodically contacts and separates from the screen surface during the sliding process, scraping off the sand particles attached to the outer surface of the coarse filter screen 14. The water flow after two stages of filtration is pushed into the output connecting cover 21 by the active impeller 112. The driven impeller 26 drives the blades 27 to rotate synchronously, generating a secondary push on the water flow to enhance the output pressure. During the process, the impact roller 210 slides along the limiting guide rail 28 under the action of centrifugal force. At the same time, the permanent magnet 212 inside the impact roller 210 is subjected to the alternating magnetic force transmitted by the magnetic conduction ring 25 to generate reciprocating vibration, which applies continuous mechanical disturbance to the surface of the blade 27 and the inner wall of the flow channel to prevent sand particles from depositing. In addition, the L-shaped bracket 31 drives the cleaning brush 36 to rotate. Under the action of centrifugal force, the cleaning brush 36 extends radially through the limiting slide rod 32, so that the cleaning burr 37 is attached to the outer surface of the coarse filter screen 14 for rotating brushing. At the same time, the permanent magnet 35 on the cleaning brush 36 and the permanent magnet 35 on the L-shaped bracket 31 generate repulsive force with the same pole, so that the cleaning brush 36 generates high-frequency axial vibration during rotation, which enhances the sand and dirt removal effect. Finally, the clean water after filtration, pressurization and anti-deposition treatment is collected through the output sealing pipe 22 and discharged from the output connection valve 23 to the external water supply pipeline.

[0026] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A deep well submersible pump with anti-sand clogging and self-cleaning function, comprising a drive mechanism (1); The output mechanism (2) is located on top of the drive mechanism (1); And a cleaning mechanism (3) disposed on the outer surface of the drive mechanism (1) for cleaning, characterized in that: The driving mechanism (1) includes a driving component and a filter component disposed inside the driving component. The output mechanism (2) includes an output component disposed on the outer surface of the driving mechanism (1) and an auxiliary extraction component disposed inside the output component. The cleaning mechanism (3) includes a connecting component disposed on the outer surface of the driving mechanism (1) and a cleaning component disposed on the outer surface of the connecting component.

2. The deep well submersible pump with anti-sand clogging and self-cleaning function according to claim 1, characterized in that: The drive assembly includes a sealed housing (11), a connecting flange (12) is fixedly connected to the top of the sealed housing (11), a coarse filter screen (14) is fixedly connected to the outer surface of the connecting flange (12), a waterproof motor (16) is fixedly connected to the top of the connecting flange (12), the waterproof motor (16) is disposed inside the sealed housing (11), and the drive end of the waterproof motor (16) is detachably connected to an active impeller (112).

3. A deep well submersible pump with anti-sand clogging and self-cleaning function according to claim 2, characterized in that: The filter assembly includes a coarse filter screen (14), the outer surface of which is fixedly connected to the outer surface of the connecting flange (12), and a fine filter screen (15) is fixedly connected to the inner wall surface of the connecting flange (12).

4. A deep well submersible pump with anti-sand clogging and self-cleaning function according to claim 3, characterized in that: The outer surface of the connecting flange (12) is fixedly connected to a lower sealing bearing seat (113), the inner wall of the lower sealing bearing seat (113) is rotatably connected to a lower rolling wheel (18), and the outer surface of the lower rolling wheel (18) is fixedly connected to a lower sealing ring plate (17).

5. A deep well submersible pump with anti-sand clogging and self-cleaning function according to claim 4, characterized in that: A corrugated scraper (13) is fixedly connected to the outer surface of the lower sealing ring plate (17). The outer surface of the corrugated scraper (13) is slidably connected to the outer surface of the coarse filter screen (14). An upper sealing ring plate (111) is fixedly connected to the top of the corrugated scraper (13). An upper rolling wheel (110) is fixedly connected to the top of the upper sealing ring plate (111). An upper sealing bearing seat (19) is rotatably connected to the outer surface of the upper rolling wheel (110).

6. A deep well submersible pump for sand prevention and self-cleaning according to claim 1, characterized in that: The output assembly includes an output connection cover (21), one end of which is fixedly connected to one end of a coarse filter screen cover (14), the outer surface of which is fixedly connected to the inner wall of an upper sealing bearing seat (19), an output sealing pipe (22) is fixedly connected to the top of which is fixedly connected to the top of which is an output connection valve (23).

7. A deep well submersible pump for sand prevention and self-cleaning according to claim 6, characterized in that: The auxiliary extraction component includes a driven impeller (26), which is disposed inside the output connection cover (21). The inner wall surface of the driven impeller (26) is fixedly connected to the outer surface of the drive end of the waterproof motor (16). A blade (27) is fixedly connected to the outer surface of the driven impeller (26). A magnetic conduction ring (25) fixedly connected to the inner wall of the output connection cover (21) is provided on the outer side of the blade (27). An electromagnet outer ring (24) is fixedly connected to the outer surface of the output connection cover (21).

8. A deep well submersible pump for sand prevention and self-cleaning according to claim 7, characterized in that: The inner wall surface of the blade (27) is fixedly connected to a limiting guide rail (28), and the inner wall of the limiting guide rail (28) is slidably connected to an impact roller (210). Both ends of the impact roller (210) are provided with rollers (211). The outer surfaces of the blade (27) and the limiting guide rail (28) are slidably connected to both ends of the impact roller (210) through the rollers (211). The inner surface of the impact roller (210) is fixedly connected to a permanent magnet (212). The inner wall surface of the blade (27) is fixedly connected to a buffer spring column (29), and the inner wall surface of the blade (27) is fixedly connected to an anti-collision pad (213).

9. A deep well submersible pump for sand prevention and self-cleaning according to claim 1, characterized in that: The connecting assembly includes an L-shaped bracket (31), one end of which is fixedly connected to the outer surface of the drive end of the waterproof motor (16). A limiting slide rod (32) is slidably connected to the inner wall of the L-shaped bracket (31). A telescopic waterproof cover (33) is sleeved on the outer surface of the limiting slide rod (32). A spring (34) is sleeved on the outer surface of the limiting slide rod (32). One end of the spring (34) is fixedly connected to the outer surface of the L-shaped bracket (31). A permanent magnet sheet (35) is fixedly connected to the outer surface of the L-shaped bracket (31).

10. A deep well submersible pump for sand prevention and self-cleaning according to claim 9, characterized in that: The cleaning assembly includes a cleaning brush (36), the outer surface of which is fixedly connected to the outer surface of the limiting slide bar (32), the outer surface of which is fixedly connected to one end of the spring (34), a permanent magnet (35) with the same pole opposite to the permanent magnet (35) on the outer surface of the spring (34) is also fixedly connected to the outer surface of the cleaning brush (36), and a deburring tool (37) is fixedly connected to the outer surface of the cleaning brush (36).

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