Water pump for preventing filter screen from being blocked

Abstract

According to the water pump for preventing the filter screen from being blocked, the mounting shell is arranged on the water inlet pipe of the water pump body, the filter assembly is arranged in the mounting shell, the filter screen is carried in the filter assembly, two openings are formed in the filter assembly, the first opening is in butt joint with the water inlet and the branch pipe of the mounting shell, and the water pump is located at the cleaning station; the second opening is in butt joint with the water inlet pipe and located at a working station. The backflushing device is arranged between the water outlet pipe of the water pump body and the water inlet of the mounting shell, and the blocked filter screen is automatically cleaned online through backflushing water flow, so that the problem that the water pump needs to be shut down for manual cleaning due to blockage of the inlet filter screen is effectively solved, and continuous and stable operation of the water pump is guaranteed. The filter screen can be automatically replaced and cleaned under the conditions that the filter screen is not disassembled and public water is not influenced, so that the service life of the filter screen is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of water pump filter cleaning technology, and specifically relates to a water pump for preventing filter clogging. Background Technology

[0002] As a commonly used conveying device, a water pump draws water from an external source through an inlet pipe and then pumps it out under pressure through an outlet pipe. During the pumping process, the water source often contains various solid particles, impurities, or other suspended matter. If these substances directly enter the pump chamber, they can cause wear, blockage, or even damage to rotating components such as the impeller and shaft, severely affecting the pump's efficiency and service life.

[0003] To ensure the normal operation of a water pump, a filter screen is usually installed inside the inlet pipe to filter the water entering the pump. The filter screen effectively intercepts solid particles in the water, preventing impurities from entering the pump body. However, as the filtration process continues, the intercepted particles gradually accumulate on the filter screen surface, forming a layer of dirt, which reduces the filter's permeability. As the accumulated particles on the filter screen increase, the resistance to water flow gradually increases, leading to a decrease in the pump's water intake capacity, reduced flow rate, increased energy consumption, and in severe cases, even cavitation or complete blockage of the pump. Therefore, regular cleaning and maintenance of the filter screen is a necessary measure to ensure the normal operation of the water pump system.

[0004] Currently, the primary method for cleaning water pump filters is manual disassembly. Traditional methods require complete removal of the filter module: operators must first shut off the water pump power and water supply valve, then use tools to remove the bolts and connectors securing the filter module, remove the filter from the pipe, and manually brush or rinse it with a high-pressure water gun. Finally, the filter is reinstalled and the system is restored to operation. This cleaning process is cumbersome, time-consuming, labor-intensive, and requires professional personnel. During disassembly and reassembly, not only are sealing elements easily damaged, but improper installation may also introduce new points of failure.

[0005] Furthermore, existing filter structures themselves have certain limitations. Most filter structures are simple and lack sufficient resistance to deformation, making them prone to deformation under high water pressure, affecting filtration efficiency and service life. At the same time, the cleaning and maintenance cycle of traditional filters relies mainly on experience, lacking effective methods for detecting blockages. Cleaning is often only performed after the filter is severely clogged and affecting the normal operation of the system, reducing the overall efficiency and reliability of the water pump system.

[0006] Therefore, there is an urgent need for a new cleaning solution for water pump filters that can effectively clean the filters without disassembling them, while also extending their service life. Summary of the Invention

[0007] The purpose of this invention is to provide a water pump for preventing filter clogging, which can automatically replace and clean the filter without disassembling it, thereby improving the service life of the filter.

[0008] To solve the above-mentioned technical problems, the present invention provides a water pump for preventing filter clogging, comprising:

[0009] The water pump body is provided with an inlet pipe and an outlet pipe, and the outer end side wall of the inlet pipe has a cut.

[0010] A filtration device includes a mounting shell, a filter assembly, and a drain pipe. The two sides of the mounting shell are respectively sealed and connected to the cuts of the inlet pipe, so that the mounting shell is connected to the inlet pipe at both ends of the cut. The mounting shell has an inlet and a drain on its two sides respectively. The drain pipe is installed on the drain. The filter assembly is disposed inside the mounting shell and a filter screen is disposed inside the filter assembly.

[0011] The backflushing device includes a branch pipe and a solenoid three-way valve. One inlet of the solenoid three-way valve is connected to the outlet of the water pump body, and the two outlets are respectively connected to one end of the outlet pipe and one end of the branch pipe. The other end of the branch pipe is connected to the inlet of the mounting shell.

[0012] The sealing device includes a sealing sleeve disposed on the outer port of the drain pipe and a driving component for driving the sealing sleeve to move closer to or further away from the drain outlet;

[0013] The filter assembly has a first opening and a second opening on its housing, and a filter screen is installed inside the housing, so that the drain outlet is connected to the first opening and the cut is connected to the second opening.

[0014] Optionally, the water pump used for preventing filter clogging described above also includes a vibration device, which is disposed between the branch pipe and the mounting housing to cause the filter to vibrate.

[0015] Optionally, in the above-mentioned water pump for preventing filter clogging, the vibration device includes a sealing shell, a sealing ring, a support frame, a drive shaft, turbine blades, and a spring, and the filter screen is provided with a vibration column;

[0016] The two ends of the sealing shell are respectively sealed to the branch pipe and the mounting shell. The sealing ring is slidably disposed in the sealing shell. The support frame is disposed on the inner wall of the sealing ring. The drive shaft is rotatably disposed on the support frame. The turbine blade and the spring are respectively disposed at both ends of the drive shaft.

[0017] When the recoil device is activated, the turbine blades drive the drive shaft and the spring to rotate, and the spring is used to collide with the vibrating column.

[0018] Optionally, the water pump for preventing filter clogging described above also includes a transmission assembly, one end of which passes through the sealing shell and is connected to the sealing ring, the transmission assembly is slidably connected to the sealing shell, and the other end of the transmission assembly is fixedly connected to the sealing sleeve.

[0019] Optionally, in the above-mentioned water pump for preventing filter clogging, the driving component includes a motor, and the fixed end of the motor is disposed on the mounting housing;

[0020] The driving component further includes: a guiding component for driving the sealing sleeve away from the drain outlet, and an elastic reset component for driving the sealing sleeve back to the drain outlet.

[0021] Optionally, in the water pump described above for preventing filter clogging, a lever is provided on the sealing sleeve;

[0022] The guiding component includes a guide groove disposed on the output shaft of the motor. The guide groove includes multiple sets disposed circumferentially along the output shaft. The guide groove is used to guide the lever to move axially. Each guide groove includes a first arc-shaped groove, a second arc-shaped groove, and a transverse groove. The outlet end of the first arc-shaped groove is connected to the inlet end of the second arc-shaped groove. The outlet end of the second arc-shaped groove is connected to the inlet end of the transverse groove. The outlet end of the transverse groove is connected to the inlet end of the first arc-shaped groove of the adjacent set. The transverse groove is disposed axially.

[0023] When the motor starts, the rotation of the output shaft drives the lever to enter from the inlet end of the first arc-shaped groove, pass through the first arc-shaped groove and the second arc-shaped groove, and reach the inlet end of the transverse groove. At this time, the sealing sleeve opens. When the motor stops starting, the lever moves from the inlet end of the transverse groove to the outlet end of the transverse groove under the action of the elastic reset component. At this time, the sealing sleeve closes.

[0024] Optionally, in the water pump described above for preventing filter clogging, the second arc-shaped groove has a larger arc than the first arc-shaped groove.

[0025] Optionally, in the water pump for preventing filter clogging described above, the driving component further includes a one-way component, which includes an outer expansion groove, a wedge block, and a first spring. The outer expansion groove is vertically disposed at the outlet end of the transverse groove, and the two ends of the first spring are respectively connected to the wedge block and the bottom of the outer expansion groove.

[0026] Optionally, in the above-mentioned water pump for preventing filter clogging, the elastic reset assembly includes a pump cylinder, a wing plate, a connecting column, a piston, and a second spring. The fixed end of the pump cylinder is disposed on the mounting shell, and the movable end of the pump cylinder is connected in sequence through the second spring, the piston, the connecting column, and the wing plate. The wing plate is disposed on the sealing sleeve.

[0027] Optionally, in the water pump used for preventing filter clogging described above, the pump cylinder is provided with an air inlet pipe and an air outlet pipe, and the diameter of the air outlet pipe is smaller than the diameter of the air inlet pipe.

[0028] Optionally, in the water pump described above for preventing filter clogging, the outer edges of the first opening and the second opening are provided with anti-leakage rings.

[0029] This invention provides a water pump for preventing filter clogging, which has the following advantages:

[0030] A mounting housing is installed on the inlet pipe of the water pump body, and a filter assembly is installed inside the housing. The filter assembly contains a filter screen. The filter assembly has two openings: the first opening connects to the inlet and branch pipe of the mounting housing (in the cleaning position), and the second opening connects to the inlet pipe (in the working position). A backflushing device is installed between the outlet pipe of the water pump body and the inlet of the mounting housing. The backflushing water flow automatically cleans the clogged filter screen online, effectively solving the problem of needing to stop the water pump for manual cleaning due to filter screen blockage, and ensuring continuous and stable operation of the water pump. This allows for automatic replacement and cleaning of the filter screen without disassembling it or affecting public water use, thus extending the filter screen's lifespan. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a water pump for preventing filter clogging, provided by an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a portion at point A;

[0034] Figure 3 for Figure 2 A magnified view of the area at point B;

[0035] Figure 4A unidirectional component cross-sectional view of a water pump for preventing filter clogging, provided in an embodiment of the present invention;

[0036] Figure 5 An exploded view of an elastic component of a water pump for preventing filter clogging, provided in an embodiment of the present invention;

[0037] Figure 6 A cross-sectional view of the mounting housing of a water pump for preventing filter clogging, provided for an embodiment of the present invention (the fixed end of the motor is not shown).

[0038] Figure 7 This is a schematic diagram of the external structure of a filter assembly for a water pump used to prevent filter clogging, provided in an embodiment of the present invention.

[0039] Figure 8 This is a schematic diagram of the internal structure of a vibration device for preventing filter clogging in a water pump, provided as an embodiment of the present invention.

[0040] In the image above:

[0041] 100 - Pump body; 110 - Inlet pipe; 120 - Outlet pipe;

[0042] 210 - Mounting housing; 220 - Filter assembly; 221 - Filter screen; 222 - Vibrating column; 2231 - First opening; 2232 - Second opening; 2233 - Leak-proof ring; 230 - Drain pipe;

[0043] 310 - Branch pipe; 320 - Solenoid three-way valve;

[0044] 410 - Sealing sleeve; 411 - Lever;

[0045] 510 - Sealing shell; 520 - Sealing ring; 530 - Support frame; 540 - Drive shaft; 541 - Turbine blade; 542 - Spring;

[0046] 610 - Moving column; 620 - Adapter column;

[0047] 710 - Motor; 720 - Guide assembly; 721 - First arc-shaped groove; 722 - Second arc-shaped groove; 723 - Horizontal groove; 730 - One-way assembly; 731 - Outward expansion groove; 732 - Wedge block; 733 - First spring; 740 - Elastic reset assembly; 741 - Wing plate; 742 - Connecting column; 743 - Piston; 744 - Pump cylinder; 745 - Second spring; 746 - Inlet pipe; 747 - Outlet pipe; 748 - First one-way valve; 749 - Second one-way valve. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The core of this invention is to provide a water pump for preventing filter clogging, which can automatically replace and clean the filter without disassembling it, thereby improving the service life of the filter.

[0050] To enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Given that some existing technologies, such as the above-mentioned technologies, involve water pumps connected to municipal or public water sources that cannot achieve self-cleaning through backwashing, requiring the disassembly of the filter module for complete cleaning, which is inconvenient and wastes manpower, the following technical solution is proposed:

[0052] Please refer to Figures 1-8 The present invention provides an automatic cleaning mechanism for clogging the inlet filter of a water pump, comprising a water pump body 100, a filter device, a backflushing device, and a sealing device.

[0053] The water pump body 100 is equipped with an inlet pipe 110 and an outlet pipe 120. A cutout is provided on the outer side wall of the inlet pipe 110. Specifically, a rectangular cutout is provided on the wall of the inlet pipe 110 near the inlet side of the water pump body 100. This cutout is used to install a subsequent filter device, ensuring that water flows through the filter device before entering the water pump. Both the inlet pipe 110 and the outlet pipe 120 have flanges at their ends for fixing to external pipes. The water pump body 100 described herein is prior art, capable of allowing water from the inlet pipe 110 to enter the water pump body 100 and be pressurized before being ejected through the outlet pipe 120.

[0054] The filtration device includes a mounting housing 210, a filter assembly 220, and a drain pipe 230. Both sides of the mounting housing 210 are sealed and connected to the cuts of the inlet pipe 110, allowing the mounting housing 210 to communicate with the inlet pipes 110 at both ends of the cuts. Figure 1 and Figure 6As shown, the mounting housing 210 is typically designed as a closed cylindrical or box-shaped structure. The mounting housing 210 is fitted onto the inlet pipe 110, and its left and right sides are connected to the inlet pipe 110 via flanges or welding. The connection is sealed, making the mounting housing 210 an integral part of the inlet pipeline, through which water flows. The mounting housing 210 has an inlet and a outlet on each side, with a drain pipe 230 installed on the outlet. A filter assembly 220 is housed within the mounting housing 210, containing a filter screen 221 that filters the incoming water.

[0055] The backflushing device includes a branch pipe 310 and a solenoid three-way valve 320. One inlet of the solenoid three-way valve 320 is connected to the outlet of the pump body 100, and its two outlets are respectively connected to one end of the outlet pipe 120 and one end of the branch pipe 310. The other end of the branch pipe 310 is connected to the inlet of the mounting housing 210, and the branch pipe 310 is sealed on the outlet pipe 120. The relative positions of the branch pipe 310 and the inlet pipe 110 can, in one configuration, be parallel; alternatively, the branch pipe 310 can be positioned above the inlet pipe 110 (e.g.,...). Figure 1 As shown), branch pipe 310 can also be installed below water inlet pipe 110. The installation method is not limited here and can be selected according to the actual situation.

[0056] The sealing device includes a sealing sleeve 410 disposed on the outer port of the drain pipe 230, and a drive component for moving the sealing sleeve 410 closer to or further away from the drain outlet. The sealing device is used to close the drain pipe 230 during backflushing, establishing flushing pressure. The sealing sleeve 410 is shaped to match the outer port of the drain pipe 230, and can be made of corrosion-resistant rubber or polyurethane material, possessing a certain degree of elasticity to achieve a seal upon compression. When backflushing is required, the drive component actuates, pushing the sealing sleeve 410 tightly against the port of the drain pipe 230, sealing it. After flushing, the drive component moves the sealing sleeve 410 away from the drain outlet, restoring the passage.

[0057] The mounting housing 210 has a precision-machined annular sealing seat inside, which forms a dynamic seal with the filter assembly 220. The filter assembly 220 has a first opening 2231 and a second opening 2232 on its housing. A filter screen 221 is installed inside the housing of the filter assembly 220, so that the drain outlet aligns with the first opening 2231 and the cut aligns with the second opening 2232. This allows for rapid switching between the working position (the position opposite the cut) and the cleaning position (the position opposite the drain outlet).

[0058] Under normal filtration conditions, the solenoid three-way valve 320 connects the outlet of the water pump body 100 to the outlet pipe 120, allowing all water output from the pump to flow into the subsequent system. When backwashing is required, the control system issues a command, and the solenoid three-way valve 320 switches the flow path, connecting the outlet of the water pump body 100 to the branch pipe 310, while simultaneously closing the passage to the outlet pipe 120. At this time, the high-pressure water output from the pump flows back through the branch pipe 310 into the mounting housing 210, rinsing the filter screen in the cleaning position from the inside out.

[0059] It should be noted that all connections between pipes and components are sealed to prevent water leakage. Both ends of the filter assembly 220 abut against the inner wall of the mounting housing 210. The electromagnetic three-way valve 320 can automatically switch the pipeline on and off, allowing water to enter the branch pipe 310. The electromagnetic three-way valve 320 in this case is prior art and will not be described in detail here.

[0060] The filter screen 221 can be fitted and fixed to the inner wall of the housing of the filter assembly 220 by a pressure ring or fasteners. The filter screen 221 can be a V-shaped wedge wire mesh or a perforated plate to improve the filtration effect and anti-clogging ability.

[0061] This solution utilizes backwashing technology to change the water flow direction, flushing from the outlet side to the inlet side of the filter screen 221 to remove impurities clogging the filter screen 221, thus achieving online cleaning of the filter screen 221. Simultaneously, wastewater is discharged through the drain pipe of the mounting housing 210. For water pump devices connected to municipal water supply systems or public water sources, this solution achieves self-cleaning while avoiding water pollution caused by backwashing.

[0062] This invention provides an automatic cleaning mechanism for a clogged inlet filter screen of a water pump. A mounting shell 210 is installed on the inlet pipe 110 of the water pump body 100. A filter assembly 220 is installed inside the mounting shell 210, and a filter screen 221 is mounted inside the filter assembly 220. The filter assembly 220 has two openings: a first opening connects to the inlet of the mounting shell 210 and a branch pipe 310, positioned for cleaning; and a second opening connects to the inlet pipe 110, positioned for operation. A backflushing device is installed between the outlet pipe 120 of the water pump body 100 and the inlet of the mounting shell 210. The backflushing water flow automatically cleans the clogged filter screen online, effectively solving the problem of needing to stop the water pump for manual cleaning due to inlet filter screen clogging, thus ensuring continuous and stable operation of the water pump. This mechanism achieves automatic replacement and cleaning of the filter screen without disassembling it or affecting public water use, thereby extending the filter screen's service life.

[0063] This solution also includes a vibration device, which is installed between the branch pipe 310 and the mounting housing 210 to cause the filter screen 221 to vibrate. Vibrating the filter screen 221 during the cleaning process improves the cleaning effect.

[0064] In a further specific embodiment, such as Figure 8 As shown, the vibration device includes a sealing shell 510, a sealing ring 520, a support frame 530, a drive shaft 540, a turbine blade 541, and a spring 542. A vibration column 222 is provided on the filter screen 221.

[0065] The two ends of the sealing shell 510 are respectively sealed and connected to the branch pipe 310 and the mounting shell 210, in combination. Figure 6 As shown, the sealing shell 510 has a cylindrical structure. One end is sealed to the branch pipe 310 via a flange, and the other end is fixed to the mounting shell 210 via bolts. Rubber sealing rings are provided at the connection points to ensure sealing. The sealing ring 520 is slidably disposed inside the sealing shell 510, and the support frame 530 is disposed on the inner wall of the sealing ring 520. Under fluid pressure, the sealing ring 520 is tightly pressed against the sliding groove of the sealing shell 510 to prevent axial movement, while the support frame 530 ensures the stable operation of the drive shaft 540. The drive shaft 540 is rotatably disposed on the support frame 530, and the turbine blades 541 and spring plates 542 are respectively disposed at both ends of the drive shaft 540. Specifically, the outer edge of the support frame 530 is fixed to the inner wall of the sealing ring 520, and the center is connected to the drive shaft 540 via a bearing seat. One end of the drive shaft 540 extends into the branch pipe 310, and the other end extends into the mounting shell 210 near the filter screen 221. The turbine blade 541 is fixed to one end of the drive shaft 540 and consists of multiple backward-curved arc blades. The blade inclination angle can be designed to be 30°-45°, which is suitable for liquid medium flow drive.

[0066] When the backwash device is activated, high-pressure fluid is injected from branch pipe 310, impacting the turbine blades 541 and causing them to rotate. The turbine blades 541 drive the drive shaft 540 and the spring plate 542 to rotate. The length of the spring plate 542 is calculated to ensure that it elastically collides with the vibrating column 222 during rotation. The vibration waves generated by the collision propagate on the surface of the filter screen 221, causing impurities attached to the mesh to fall off. During the backwashing process, the force of the water can also drive the spring plate 542 to continuously collide with the vibrating column 222, generating vibrations that cause the filter screen 221 to vibrate. Combined with backwashing, this results in a better cleaning effect for the filter screen.

[0067] This solution also includes a transmission component, one end of which passes through the sealing shell 510 and is connected to the sealing ring 520. The transmission component is slidably connected to the sealing shell 510, and the other end of the transmission component is fixedly connected to the sealing sleeve 410.

[0068] Specifically, the transmission assembly includes a moving column 610 and a connecting column 620. One end of the moving column 610 passes through the sealing shell 510 and is connected to the sealing ring 520. The moving column 610 and the sealing shell 510 are in a sealed sliding connection. The other end of the moving column 610 is connected to one end of the connecting column 620, and the other end of the connecting column 620 is fixedly connected to the sealing sleeve 410. The moving column 610 and the connecting column 620 form a U-shaped structure, with the middle section used to avoid the mounting shell 210. In use, when the sealing sleeve 410 moves away from the drain outlet, the connecting column 620 moves, causing the moving column 331 to move in the same direction, thereby causing the sealing ring 520 and the transmission shaft 540 to move together, so that the vibrating column 222 is within the range where the spring piece 542 can collide. In summary, by setting up a vibration device, when the sealing sleeve 410 is opened, it can also drive the spring piece 542 to move to a range that can collide with the vibration column 222. Combined with the backwash water pressure, the drive shaft 540 rotates, causing the spring piece 542 to collide with the vibration column 222 and generate vibration, which makes the filter screen 221 vibrate, resulting in a better cleaning effect.

[0069] In a specific embodiment, the driving component includes a motor 710, the fixed end of which is disposed on the mounting housing 210. The driving component also includes a guide assembly 720 for driving the sealing sleeve 410 away from the drain outlet, and an elastic reset assembly 740 for driving the sealing sleeve 410 back to the drain outlet.

[0070] In one embodiment, the motor 710 can be a linear motor capable of driving the sealing sleeve 410 to move axially.

[0071] In another form of the motor 710, based on the above specific embodiment, a lever 411 is provided on the sealing sleeve 410 to guide the movement of the sealing sleeve 410.

[0072] The guide assembly 720 includes guide grooves disposed on the output shaft of the motor 710. Multiple sets of guide grooves are arranged circumferentially along the output shaft. These guide grooves guide the lever 411 to move axially. Each guide groove includes a first arc-shaped groove 721, a second arc-shaped groove 722, and a transverse groove 723. The outlet end of the first arc-shaped groove 721 communicates with the inlet end of the second arc-shaped groove 722. The outlet end of the second arc-shaped groove 722 communicates with the inlet end of the transverse groove 723. The outlet end of the transverse groove 723 communicates with the inlet end of the first arc-shaped groove 721 of the adjacent set. The transverse groove 723 is arranged axially. The first arc-shaped groove 721 cooperates with the lever 411, allowing the lever 411 to move away from the sealing sleeve when the output shaft of the motor 710 rotates, thus separating the sealing sleeve 410 from the drain pipe 230.

[0073] When the motor 710 starts, the rotation of the output shaft drives the lever 411 to enter from the inlet end of the first arc groove 721, pass through the first arc groove 721 and the second arc groove 722, and reach the inlet end of the transverse groove 723. At this time, the sealing sleeve 410 opens. When the motor 710 stops starting, the lever 411 moves from the inlet end of the transverse groove 723 to the outlet end of the transverse groove 723 under the action of the elastic reset component 740. At this time, the sealing sleeve 410 closes.

[0074] By setting up a sealing device in conjunction with the guide component 720, the drain pipe 230 is sealed by driving the sealing sleeve 410, which prevents the filter screen 221 from getting dusty after rinsing. After the motor 710 rotates to replace the filter screen, the sealing sleeve 410 can automatically open for a period of time without affecting the backwashing of the filter screen.

[0075] To better control the movement speed of the lever 411, the second arc-shaped groove 722 has a larger curvature than the first arc-shaped groove 721. Specifically, the second arc-shaped groove 722 is "steeper" than the first arc-shaped groove 721, resulting in a longer movement time for the lever 411 within the first arc-shaped groove 721. Furthermore, when the lever 411 is within the second arc-shaped groove 722, the rotation angle of the motor 710 output shaft is smaller, and the distance the lever 411 moves is greater than when it is within the first arc-shaped groove 721. The first arc-shaped groove 721 connects to the adjacent set of transverse grooves 723, thus eliminating the need for the motor 710 output shaft to rotate when the lever 411 resets.

[0076] In a specific embodiment, the driving component further includes a one-way assembly 730, which includes an expanding groove 731, a wedge block 732, and a first spring 733. The expanding groove 731 is vertically disposed at the outlet end of the transverse groove 723, and the two ends of the first spring 733 are respectively connected to the wedge block 732 and the bottom of the expanding groove 731. Specifically, the wedge block 732 is slidably connected inside the expanding groove 731, and the wedge block 732 is elastically connected to the inner wall of the expanding groove 731 through the first spring 733. The inclined side of the wedge block 732 faces the inlet end of the transverse groove 723.

[0077] The aforementioned wedge block 732 is configured such that its inclined side faces the inlet end of the transverse groove 723, preventing the lever 411 from entering the outlet end of the transverse groove 723. Instead, the lever 411 moves directly into the first arc groove 721. When the connection between the first arc groove 721 and the second arc groove 722 engages with the lever 411, the end face of the sealing sleeve 410 is flush with the outlet of the drain pipe 230. As the second arc groove 722 continues to engage with the lever 411, it can drive the sealing sleeve 410 to continue moving outward, thereby opening the drain pipe 230.

[0078] It should also be noted that, with the cooperation of the second arc-shaped groove 722 and the lever 411, the drive shaft 540 moves into the first opening 2231 and slowly approaches the filter screen 221. During this process, since the drive shaft 540 is always within the first opening 2231, the drive shaft 540 will not get stuck. When the lever 411 moves into the transverse groove 723, the center point of the drive shaft 540 is collinear with the center point of the filter screen in the first opening 2231. At this time, the vibrating column 222 is within the range where the spring 542 can collide. Then, as the water pump body 100 pumps water, it drives the turbine blades 541 to rotate, thereby rotating the drive shaft 540. This causes the spring 542 to collide with the vibrating column 222 intermittently, causing the filter screen 221 to vibrate. The filter screen can be made of metal, so it will not be damaged by vibration. The vibration combined with water backwashing makes the filter screen cleaning effect better. When the sealing sleeve 410 is reset, the drive shaft 540 moves away from the filter screen, which will not affect the next exchange of the two filter screen positions.

[0079] In a specific embodiment, the elastic reset assembly 740 includes an air pump cylinder 744, a wing plate 741, a connecting post 742, a piston 743, and a second spring 745. The fixed end of the air pump cylinder 744 is disposed on the mounting shell 210, and the movable end of the air pump cylinder 744 is connected in sequence through the second spring 745, the piston 743, the connecting post 742, and the wing plate 741. The wing plate 741 is disposed on the sealing sleeve 410.

[0080] A piston 743 is slidably connected inside the air pump cylinder 744. A connecting column 742, which is fixed to the wing plate 741, is fixedly connected to the piston 743. The piston 743 is elastically connected to the inner wall of the air pump cylinder 744 through a second spring 745.

[0081] During the movement of the sealing sleeve 410, the wing plate 741 will move, which will cause the connecting column 742 to move and drive the piston 743 to move. The second spring 745 will draw gas into the pump cylinder 744 through the air inlet pipe 746.

[0082] It should be noted that the second spring 745 is elastic enough to ensure that it can drive the piston 743 to reset and ensure that the sealing sleeve 410 can reset. Here, the water pressure pumped out by the water pump is constant and sufficient to drive the turbine blades 541, so that the drive shaft 540 rotates.

[0083] Furthermore, the air pump cylinder 744 is equipped with an inlet pipe 746 and an outlet pipe 747, the diameter of which is smaller than that of the inlet pipe 746. A first one-way valve 748 and a second one-way valve 749 are respectively installed on the inlet pipe 746 and the outlet pipe 747. It should be noted that the diameter of the inlet pipe 746 is much larger than that of the outlet pipe 747, resulting in a faster air intake speed. However, due to the diameter limitation of the outlet pipe 747, the air exhaust speed is slower, causing the sealing sleeve 410 to reset more slowly. Simultaneously, the second one-way valve 749 further adjusts the exhaust speed of the outlet pipe 747. The first one-way valve 748 only allows gas to enter the air pump cylinder 744 from the outside, while the second one-way valve 749 only allows gas to be pumped from the air pump cylinder 744 to the outside.

[0084] When the lever 411 moves into the transverse groove 723, the piston 743 resets under the action of the second spring 745, driving the connecting column 742 to reset. This, in turn, drives the sealing sleeve 410 to reset via the wing plate 741. When the sealing sleeve 410 resets, the diameter of the exhaust pipe 747 is much smaller than that of the intake pipe 746, resulting in a slower reset speed for the connecting column 742. This ensures that the drain pipe 230 remains open for a period of time, allowing sufficient time for the branch pipe 310 to spray water to clean the filter screen 221. When the sealing sleeve 410 is about to cover the drain pipe 230, the water pump body 100 stops pumping water, without affecting the sealing sleeve 410's coverage of the filter screen 221. When further adjustment of the exhaust speed of the exhaust pipe 747 is required, the second one-way valve 749 can be adjusted directly. Alternatively, the second one-way valve 749 can be electrically controlled and linked with the water pump, allowing the water pump to automatically control the pumping time. This is a CNC technology in the prior art, which will not be elaborated here.

[0085] In summary, by setting up a sealing device, the sealing sleeve 410 and the drain pipe 230 can be opened to perform self-cleaning of the filter screen. After cleaning, the sealing sleeve 410 can automatically reset and cover the drain pipe 230 to prevent dust and other contaminants from entering the filter screen and affecting its use next time.

[0086] To prevent leakage, a leak-proof ring 2233 is provided on the outer edge of the first opening 2231 and the second opening 2232.

[0087] The automatic cleaning mechanism for the water pump inlet filter provided in this solution has two working modes: normal filtration mode and backwash cleaning mode.

[0088] In normal filtration mode, the filter screen does not require cleaning. The filter screen 221 on the second opening 2232 is aligned with the flow direction of the inlet pipe 110 (i.e., it aligns with the cut), while the filter screen 221 on the first opening 2231 aligns with the drain pipe 230. At this time, the sealing sleeve 410 of the sealing device covers the drain pipe 230, sealing the drain pipe 230 and preventing dust and other contaminants from adhering to the clean filter screen 221 at the top. Water flows normally from the inlet pipe 110 at the bottom into the mounting housing 210, then into the first opening 2231 of the filter assembly 220. After being filtered by the filter screen 221 at the bottom, the water enters the water pump and is discharged through the outlet pipe 120. Impurities are trapped on the outside of the filter screen.

[0089] When the water pump is in backwash cleaning mode, if the lower filter screen 221 becomes clogged and needs cleaning, the control system (e.g., based on timing or differential pressure signals) determines that the filter screen needs cleaning and automatically executes the following steps:

[0090] First, stop the water pump body 100 from working, control the output shaft of the motor 710 to rotate, and drive the sealing sleeve 410 to open through the guide component 720.

[0091] Then, the solenoid three-way valve 320 is activated to switch the flow path, so that water flows out of the branch pipe 310 and no water flows out of the upper end of the outlet pipe 120. At this time, water enters from the inlet pipe 110, guiding the high-pressure water pressurized by the water pump to the branch pipe 310, thereby backwashing the internal filter screen 221 through the second opening 2232 (at this time, the water pressure at the outlet of the inlet pipe 110 is relatively large, so that water can flow in from the inlet pipe 110 and then out from the drain pipe 230), realizing the automatic cleaning of the filter screen. The wastewater after rinsing is discharged from the drain pipe 230. Here, the end of the drain pipe 230 can be wrapped around the lower side of the inlet pipe 110 so that the sewage will not fall onto the inlet pipe 110.

[0092] After backwashing continues for a period of time (e.g., 30-60 seconds), the solenoid three-way valve 320 switches back to normal filtration mode, and the drive component moves the sealing sleeve 410 back. The impurities flushed off are discharged from the system through the drain pipe 230 with a small amount of water. At this point, the cleaning is complete, and the mechanism awaits the next cleaning cycle.

[0093] In summary, by incorporating a filtration device, a backwashing device, and a sealing device, the filter screen can be automatically replaced when it becomes clogged at the inlet of the water pump body 100. Furthermore, by altering the water path, the dirty filter screen can be automatically backwashed, achieving automatic cleaning of the clogged filter screen without the need for disassembly and cleaning, making it more convenient to use.

[0094] The beneficial effects of the technical solution provided by this invention include:

[0095] 1. Online automatic cleaning: By setting up a motor and branch pipes for the water outlet, backwashing is used to clean the dirty filter screen. The drain pipe is not connected to the public pipeline, thus realizing the backwashing of the filter screen. The filter screen can be cleaned without disassembly, which greatly improves the continuity and reliability of the system.

[0096] 2. Dual-station design, seamless switching: The flow channel is switched by an electromagnetic three-way valve to ensure that the water flow is always unobstructed and the cleaning process does not affect the normal water intake of the water pump.

[0097] 3. Highly efficient and thorough backwashing: Backwashing is performed using the pressure water at the pump's outlet, which makes efficient use of energy, provides strong flushing power, and has a significant effect.

[0098] 4. High degree of automation: By linking with differential pressure controllers or timers, it can achieve fully automatic operation, reducing manual maintenance costs and labor intensity.

[0099] 5. Compact structure and easy maintenance: Each functional module is clearly designed, which facilitates installation and subsequent inspection and maintenance.

[0100] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0101] In the description of this application, "multiple" means two or more. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0102] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0103] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0104] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0105] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0106] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A water pump for preventing filter clogging, characterized in that, include: A water pump body (100) is provided with an inlet pipe (110) and an outlet pipe (120), and a cut is provided on the outer side wall of the inlet pipe (110); The filtration device includes a mounting shell (210), a filter assembly (220), and a drain pipe (230). The two sides of the mounting shell (210) are respectively sealed and connected to the cut of the water inlet pipe (110), so that the mounting shell (210) is connected to the water inlet pipe (110) at both ends of the cut. The mounting shell (210) has a water inlet and a drain outlet on its two sides respectively. The drain pipe (230) is installed on the drain outlet. The filter assembly (220) is disposed inside the mounting shell (210), and a filter screen (221) is disposed inside the filter assembly (220). The backflushing device includes a branch pipe (310) and an electromagnetic three-way valve (320). One inlet of the electromagnetic three-way valve (320) is connected to the outlet of the water pump body (100), and the two outlets are respectively connected to the outlet pipe (120) and one end of the branch pipe (310). The other end of the branch pipe (310) is connected to the inlet of the mounting shell (210). The sealing device includes a sealing sleeve (410) disposed on the outer port of the drain pipe (230), and a driving component for driving the sealing sleeve (410) to move closer to or further away from the drain outlet; The filter assembly (220) has a first opening (2231) and a second opening (2232) on its housing. The filter assembly (220) is covered with a filter screen (221) so that the drain outlet is connected to the first opening (2231) and the cut is connected to the second opening (2232).

2. The water pump for preventing filter clogging according to claim 1, characterized in that, It also includes a vibration device disposed between the branch pipe (310) and the mounting shell (210) for causing the filter screen (221) to vibrate.

3. The water pump for preventing filter clogging according to claim 2, characterized in that, The vibration device includes a sealing shell (510), a sealing ring (520), a support frame (530), a drive shaft (540), turbine blades (541) and a spring sheet (542), and a vibration column (222) is provided on the filter screen (221). The two ends of the sealing shell (510) are respectively sealed and connected to the branch pipe (310) and the mounting shell (210). The sealing ring (520) is slidably disposed in the sealing shell (510). The support frame (530) is disposed on the inner wall of the sealing ring (520). The drive shaft (540) is rotatably disposed on the support frame (530). The turbine blade (541) and the spring piece (542) are respectively disposed at both ends of the drive shaft (540). When the recoil device is activated, the turbine blade (541) drives the drive shaft (540) and the spring (542) to rotate, and the spring (542) is used to collide with the vibrating column (222).

4. The water pump for preventing filter clogging according to claim 3, characterized in that, It also includes a transmission assembly, one end of which passes through the sealing shell (510) and is connected to the sealing ring (520). The transmission assembly is slidably connected to the sealing shell (510), and the other end of the transmission assembly is fixedly connected to the sealing sleeve (410).

5. The water pump for preventing filter clogging according to claim 1, characterized in that, The driving component includes a motor (710), and the fixed end of the motor (710) is disposed on the mounting housing (210); The drive component further includes: a guide assembly (720) for driving the sealing sleeve (410) away from the drain outlet, and an elastic reset assembly (740) for driving the sealing sleeve (410) back to the drain outlet.

6. The water pump for preventing filter clogging according to claim 5, characterized in that, A lever (411) is provided on the sealing sleeve (410). The guide assembly (720) includes a guide groove disposed on the output shaft of the motor (710). The guide groove includes multiple sets disposed circumferentially along the output shaft. The guide groove is used to guide the lever (411) to move axially. Each guide groove includes a first arc groove (721), a second arc groove (722), and a transverse groove (723). The outlet end of the first arc groove (721) is connected to the inlet end of the second arc groove (722). The outlet end of the second arc groove (722) is connected to the inlet end of the transverse groove (723). The outlet end of the transverse groove (723) is connected to the inlet end of the first arc groove (721) of the adjacent set. The transverse groove (723) is disposed axially. When the motor (710) starts, the rotation of the output shaft drives the lever (411) to enter from the inlet end of the first arc groove (721), pass through the first arc groove (721) and the second arc groove (722), and reach the inlet end of the transverse groove (723). At this time, the sealing sleeve (410) opens. When the motor (710) stops starting, the lever (411) moves from the inlet end of the transverse groove (723) to the outlet end of the transverse groove (723) under the action of the elastic reset component (740). At this time, the sealing sleeve (410) closes.

7. The water pump for preventing filter clogging according to claim 6, characterized in that, The second arc groove (722) has a larger arc than the first arc groove (721).

8. The water pump for preventing filter clogging according to claim 6, characterized in that, The driving component also includes a one-way component (730), which includes an outer expansion groove (731), a wedge block (732), and a first spring (733). The outer expansion groove (731) is vertically disposed at the outlet end of the transverse groove (723), and the two ends of the first spring (733) are respectively connected to the bottom of the wedge block (732) and the groove of the outer expansion groove (731).

9. The water pump for preventing filter clogging according to claim 5, characterized in that, The elastic reset assembly (740) includes a pump cylinder (744), a wing plate (741), a connecting column (742), a piston (743), and a second spring (745). The fixed end of the pump cylinder (744) is disposed on the mounting shell (210). The movable end of the pump cylinder (744) is connected in sequence through the second spring (745), the piston (743), the connecting column (742), and the wing plate (741). The wing plate (741) is disposed on the sealing sleeve (410).

10. The water pump for preventing filter clogging according to claim 9, characterized in that, The air pump cylinder (744) is provided with an air inlet pipe (746) and an air outlet pipe (747), the diameter of which is smaller than the diameter of which is smaller than that ...

11. The water pump for preventing filter clogging according to claim 1, characterized in that, Leak-proof rings (2233) are provided on the outer edges of the first opening (2231) and the second opening (2232).

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