Self-cleaning filter integrated rubber flap check valve

Abstract

This invention discloses a self-cleaning integrated rubber flap check valve, comprising a valve body with an internal valve flap and an inclined cylindrical filter component. The drain port of the valve body faces downwards. The filter component is hollow and open at both ends. It also includes a hydraulic drive unit and connecting parts. This integrated rubber flap check valve can drive the cylindrical filter screen to rotate through hydraulic action, thereby allowing the horizontally flowing fluid inside the valve body to flush various parts of the cylindrical filter screen, thus achieving automatic cleaning of the filter screen. When impurities accumulate inside the slag collection pipe, they can be discharged through the discharge valve, eliminating the need for manual periodic disassembly and cleaning of the filter screen, reducing labor intensity.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a self-cleaning integrated filter rubber flap check valve. Background Technology

[0002] A check valve is a valve that automatically opens and closes its disc based on the flow of the medium itself, used to prevent backflow of the medium. Its main function is...

[0003] Its function is to prevent backflow of the medium, prevent pump and drive motor from reversing, and prevent leakage of the medium in the container. It is generally installed at the drain port of equipment, devices and pipelines. At the same time, in order to filter the fluid and remove impurities, it is generally used alone in conjunction with a Y-shaped filter or directly installed inside the check valve to form an integrated filter check valve.

[0004] In existing integrated filter check valves, impurities and particles gradually accumulate on the cylindrical filter screen over time, causing filter blockage and affecting fluid filtration efficiency. Therefore, it is necessary to manually disassemble and clean the cylindrical filter screen periodically before reinstalling it to restore its original filtration efficiency and maintain the normal operation of the valve. However, this periodic manual cleaning has the following problems: the cleaning interval varies depending on the amount of impurities in the fluid, especially for fluids with shorter cleaning intervals, requiring frequent disassembly, cleaning, and reinstallation of the filter screen, which is labor-intensive and troublesome. Therefore, this application provides a self-cleaning integrated filter rubber flap check valve to meet the requirements. Summary of the Invention

[0005] The purpose of this application is to provide a self-cleaning integrated filter rubber flap check valve to solve the inconvenience caused by the need for frequent disassembly, cleaning and reinstallation of the filter screen in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: a self-cleaning integrated filter rubber flap check valve, comprising a valve body with an internal valve flap and an inclined cylindrical filter component, wherein the drain port of the valve body faces downward, and the filter component is hollow with openings at both the top and bottom, and further comprising...

[0007] The hydraulic drive unit uses water to drive the filter component to rotate within the valve body. The fluid with a certain flow rate inside the valve body impacts the inclined filter component, causing impurities on the impacted part of the filter component to be washed away.

[0008] A connector is used to connect the filter component and the hydraulic drive unit for power transmission.

[0009] Preferably, the hydraulic drive unit includes an installation pipe connected to the drain port flange of the downwardly positioned valve body. The diameters of both the upper and lower ends of the installation pipe are larger than the diameter of the drain port. An eccentrically rotating shaft is provided inside the installation pipe, and a hydraulic impeller is mounted on the rotating shaft. The hydraulic impeller has a plurality of liquid storage chambers arranged circumferentially on its upper and lower ends.

[0010] The filter component includes an upper mounting ring and a lower mounting ring connected by multiple connecting rods. A hollow cylindrical filter screen is movably disposed between the upper mounting ring and the lower mounting ring. A ball bearing is disposed at the bottom of the filter screen, and the lower end of the ball bearing contacts the upper end face of a support ring disposed below the lower mounting ring. The lower end of the lower mounting ring is connected to a mounting flange by multiple connecting rods. The support ring is fixed to the multiple connecting rods. Adjacent connecting rods are provided with a drop gap to allow impurities to fall. A circular permanent magnet is installed near the bottom center of the filter screen.

[0011] The connector includes a transmission rod with the same inclination as the filter component. The lower end of the transmission rod is movably connected to one end of the rotating shaft that passes through the mounting tube via a universal joint. The upper end of the transmission rod passes through the magnetic shield and extends into the circular cavity of the mounting flange. The magnetic shield is fixedly mounted on the mounting flange. A magnetic shielding plate is installed in the inner cavity of the circular cavity. A circular permanent magnet is installed at the upper end of the transmission rod. The second permanent magnet is arranged opposite to the first permanent magnet, and the magnetic poles of the second permanent magnet and the opposite ends of the first permanent magnet are opposite.

[0012] The bottom of the valve body is provided with a slag receiving pipe, and a discharge valve is installed on the slag receiving pipe.

[0013] Preferably, it also includes a collision unit for causing the filter screen on the filter component to collide, thereby promoting the falling off of impurities from the filter screen.

[0014] Preferably, the collision unit includes a reciprocating screw integrally formed with the transmission rod, a movable nut is sleeved on the reciprocating screw, and an annular plate is mounted on the upper end of the movable nut through multiple columns. A ring-shaped permanent magnet three is mounted on the annular plate, and the magnetic poles of the permanent magnet three and the permanent magnet one are the same at opposite ends. A limit plate is provided on the side end of the movable nut, and the limit plate is slidably sleeved on the limit column.

[0015] The upper end of the filter screen is fixed with a ring plate, and the ring plate is inserted into the annular cavity of the upper mounting ring. The inner wall of the annular cavity is provided with a plurality of ball bearings that contact the inner and outer walls of the ring plate.

[0016] Preferably, the reciprocating screw is provided with an acceleration section and a deceleration section arranged vertically, the lower end of the acceleration section is connected to the upper end of the deceleration section, and the distance between two adjacent threaded grooves in the same direction on the acceleration section is greater than the distance between two adjacent threaded grooves in the same direction on the deceleration section.

[0017] Preferably, the acceleration section includes an upper acceleration section that drives the movable nut to move upward and a lower acceleration section that drives the movable nut to move downward, wherein the distance between two adjacent threaded grooves in the upper acceleration section is smaller than the distance between two adjacent threaded grooves in the lower acceleration section.

[0018] Preferably, the first permanent magnet, the second permanent magnet, and the third permanent magnet are all disposed inside the second magnetic shield. The magnetic pole end of the second magnetic shield is an open end. The second magnetic shield adapted to the first permanent magnet and the second permanent magnet is a circular structure, and the second magnetic shield adapted to the third permanent magnet is an annular structure.

[0019] Preferably, each of the liquid storage chambers is provided with an arc-shaped liquid outlet at its side end, and the liquid outlet velocity of the liquid outlet is less than the liquid filling velocity of the liquid filling port of the valve body into the liquid storage chamber.

[0020] Preferably, the lower end of the lower mounting ring is located above the upper end of the support ring.

[0021] Preferably, the upper and lower ends of the permanent magnet are provided with conical guide blocks, and the conical guide blocks are made of non-magnetic materials.

[0022] In summary, the technical effects and advantages of this invention are as follows:

[0023] The present invention has a reasonable structure. This integrated rubber flap check valve can drive the cylindrical filter screen to rotate through hydraulic action, so that the horizontally flowing fluid in the valve body can flush various parts of the cylindrical filter screen, thereby achieving automatic cleaning of the filter screen. When the impurities inside the slag receiving pipe are full, the impurities can be discharged through the discharge valve, eliminating the need for manual disassembly and cleaning of the filter screen periodically, thus reducing labor intensity.

[0024] In this invention, a collision unit is also provided, which causes the filter screen to collide with the upper mounting ring through hydraulic drive and loosen the stubborn impurities on the filter screen, promoting the removal of the stubborn impurities by the fluid. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a partial cross-sectional structural diagram of the present invention;

[0027] Figure 2 for Figure 1 A front view of the middle filter component;

[0028] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the middle filter screen;

[0029] Figure 4 The image shows a bottom view and a partial enlarged view of the upper mounting ring in section 2.

[0030] Figure 5 for Figure 2 A cross-sectional structural diagram of the mounting flange and magnetic shielding cover;

[0031] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the collision unit;

[0032] Figure 7 for Figure 1 Schematic diagram of the split structure of the hydraulic drive unit.

[0033] In the diagram: 1. Valve body; 2. Valve disc; 3. Filter component; 31. Filter screen; 32. Upper mounting ring; 33. Connecting rod one; 34. Lower mounting ring; 35. Ball bearing one; 36. Permanent magnet one; 37. Connecting rod two; 38. Support ring; 39. Mounting flange; 310. Ball bearing two; 311. Magnetic shielding plate; 4. Hydraulic drive unit; 41. Mounting pipe; 42. Rotating shaft; 43. Hydraulic impeller; 44. Liquid outlet; 5. Connecting parts; 51. Transmission rod; 52. Universal joint; 53. Magnetic shielding cover one; 54. Permanent magnet two; 6. Collision unit; 61. Moving nut; 62. Reciprocating screw; 63. Limiting post; 64. Annular plate; 65. Permanent magnet three; 7. Slag receiving pipe; 8. Discharge valve. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example: Reference Figure 1The self-cleaning integrated filter rubber flap check valve shown includes a valve body 1 with a valve flap 2 and an inclined cylindrical filter component 3 inside. The drain port of the valve body 1 is downward. The filter component 3 is hollow and open at both the top and bottom. It also includes a hydraulic drive unit 4, which uses water to drive the filter component 3 to rotate inside the valve body 1. The fluid with a certain flow rate inside the valve body 1 impacts the inclined filter component 3, causing impurities on the impacted part of the filter component 3 to be washed off. A connector 5 is used to connect the filter component 3 and the hydraulic drive unit 4 for power transmission.

[0036] As a preferred embodiment of this example, Figure 1-5 and Figure 7 As shown, the hydraulic drive unit 4 includes an installation pipe 41 connected to the drain port flange of the downwardly positioned valve body 1. The diameters of both the upper and lower ends of the installation pipe 41 are larger than the diameter of the drain port. An eccentrically rotating shaft 42 is mounted inside the installation pipe 41, and a hydraulic impeller 43 is mounted on the shaft 42. Several liquid storage chambers are arranged circumferentially on the hydraulic impeller 43. The filter component 3 includes an upper mounting ring 32 and a lower mounting ring 34 connected by multiple connecting rods 33. A hollow cylindrical filter screen 31 is movably arranged between the upper mounting ring 32 and the lower mounting ring 34. A ball bearing 35 is provided at the bottom of the filter screen 31, and the lower end of the ball bearing 35 contacts the upper end face of the support ring 38 located below the lower mounting ring 34. The lower end of the lower mounting ring 34 is connected to the mounting flange 39 by multiple connecting rods 37. The support ring 38 is connected to the multiple connecting rods 37. The filter screen 31 is fixed, and two adjacent connecting rods 37 are provided with a drop gap to allow impurities to fall. A circular permanent magnet 36 is installed near the bottom of the shaft center of the filter screen 31. The connecting part 5 includes a transmission rod 51 with the same inclination as the filter component 3. The lower end of the transmission rod 51 is movably connected to one end of the rotating shaft 42 through the mounting tube 41 via a universal joint 52. The upper end of the transmission rod 51 passes through the magnetic shield 53 and extends into the circular cavity of the mounting flange 39. The magnetic shield 53 is fixedly installed on the mounting flange 39. A magnetic shield 311 is installed in the inner cavity of the circular cavity. A circular permanent magnet 54 is installed at the upper end of the transmission rod 51. The permanent magnet 54 is arranged opposite to the permanent magnet 36, and the magnetic poles of the opposite ends of the permanent magnet 54 and the permanent magnet 36 are opposite. A slag receiving pipe 7 is provided at the bottom of the valve body 1, and a discharge valve 8 is installed on the slag receiving pipe 7.

[0037] In use, the water in the valve body 1 flows downwards through the drain port into the installation pipe 41, thereby driving the hydraulic impeller 43 to rotate continuously. The rotation of the hydraulic impeller 43 drives the transmission rod 51 to rotate, and the rotation of the transmission rod 51 drives the permanent magnet 54 at its upper end to rotate. Since the magnetic poles of the first permanent magnet 36 and the second permanent magnet 54 are opposite, a magnetic attraction force is generated. Therefore, the rotation of the second permanent magnet 54 can drive the filter screen 31 to rotate through the first permanent magnet 36. The fluid flowing parallel to the valve body 1 relies on inertia to attract the filter screen 31 which is close to the valve disc 2. The obliquely set filter screen 31 is impacted (the scouring intensity of the fluid on the filter screen 31 is high here, and the impurities are effectively brushed off), which can wash down the impurities trapped by filtration and then into the slag collection pipe 7 through the discharge gap. The rotation of the filter screen 31 allows all parts of the filter screen 31 to move to the scouring area near the valve disc 2 for scouring, which can realize the full automatic cleaning of the filter screen 31. This check valve automatically cleans the filter screen 31 while draining water, which can ensure smooth and stable drainage of the valve body 1, without the need for personnel to disassemble and clean the filter screen 31 regularly.

[0038] It should be noted that: First, the ball bearing 35 reduces the friction between the filter screen 31 and the support ring 38, thus reducing the resistance encountered when the permanent magnet 54 rotates the permanent magnet 36 through magnetic force. Second, the filter component 3 is installed inside the valve body 1, with the upper mounting ring 32 and lower mounting ring 34 pressed and fixed inside the valve body 1. When the filter screen 31 rotates under magnetic force, the upper mounting ring 33 and lower mounting ring 34 remain stationary. Third, using magnetic force to drive the filter screen 31 to rotate aims to prevent increasing leakage points and improve the airtightness of the valve body 1. Fourth, the circular cavity of the mounting flange 39 is provided with a magnetic shielding coating to reduce the resistance of the transmission rod 5. 1. To mitigate the resistance encountered during rotation, a magnetic shielding coating is applied to the outer surfaces of the upper mounting ring 32, lower mounting ring 43, filter screen 31, ball bearing 35, and support ring 38 to prevent the permanent magnet from exerting a magnetic force on the components. 5. When the slag receiving pipe 7 is made of transparent material, it facilitates observation of the amount of impurities accumulated inside the slag receiving pipe 7, which can be discharged through the discharge valve 8. 6. The diameters of the inlet and outlet of the mounting pipe 41 are both larger than the diameter of the outlet, allowing for timely drainage of the fluid. 7. Only one permanent magnet 36 is installed inside the filter screen 31, without too many other components, resulting in minimal obstruction of the fluid entering from the inlet.

[0039] As a preferred embodiment of this example, Figure 5 As shown, it also includes a collision unit 6, which is used to cause the filter screen 31 on the filter component 3 to collide, thereby promoting the falling off of impurities on the filter screen 31.

[0040] As a preferred embodiment of this example, Figure 6As shown, the collision unit 6 includes a reciprocating screw 62 integrally formed with the transmission rod 51. A movable nut 61 is sleeved on the reciprocating screw 62, and an annular plate 64 is mounted on the upper end of the movable nut 61 through multiple columns. An annular permanent magnet 65 is mounted on the annular plate 64. The magnetic poles of the permanent magnet 65 and the permanent magnet 36 are the same at opposite ends. A limit plate is provided on the side end of the movable nut 61, and the limit plate is slidably sleeved on the limit post 63. An annular plate is fixed on the upper end of the filter screen 31, and the annular plate is inserted into the annular cavity of the upper mounting ring 32. Multiple ball bearings 310 are provided on the inner wall of the annular cavity, which are in contact with the inner and outer walls of the annular plate.

[0041] When the transmission rod 51 rotates, the moving nut 61 moves upward in a straight line, thereby driving the permanent magnet 65 to move upward in a straight line. When the height of the permanent magnet 65 exceeds the height of the permanent magnet 54, the magnetic repulsion force generated by the permanent magnet 65 on the permanent magnet 36 is greater than the magnetic attraction force between the permanent magnet 54 and the permanent magnet 36. This can drive the filter screen 31 to overcome the magnetic attraction force, the weight of the filter screen 31 itself, and the fluid impact force, thus driving the filter screen 31 to move upward (before the height of the permanent magnet 65 exceeds the height of the permanent magnet 54, the filter screen 31 can be rotated by the magnetic attraction force between the permanent magnet 54 and the permanent magnet 36). This allows the upper end of the filter screen 31 to collide with the inner cavity of the upper mounting ring 32, causing the filter screen 31 to vibrate and dislodging the stubborn particles. The vibration loosens the impurities, making it easier for them to be brushed off by the fluid. As the transmission rod 51 continues to rotate, the moving nut 61 will move downwards and move below the permanent magnet 54 before returning to its original position. During this process, the filter screen 31, after being impacted, will return to its original position under its own gravity (including the gravity of the filter screen 31 and the gravity of the permanent magnet 36), the reaction force of the impact, the force of the fluid, and the subsequent magnetic attraction, and collide with the support ring 38 (the impact intensity of the filter screen 31 moving downwards is generally greater than the impact intensity of the filter screen 31 moving upwards), further promoting the falling off of impurities on the filter screen 31. Through the collision unit 6, the filter screen 31 in this valve body 1 can rotate and collide, which is beneficial for more thorough cleaning of the impurities trapped on the filter screen 31.

[0042] It should be noted that throughout the entire process of the filter screen 31 moving up and down, the ring plate at the upper end of the filter screen 31 never leaves the annular cavity.

[0043] As a preferred embodiment of this invention, not shown in the figure, the reciprocating screw 62 is provided with an acceleration section and a deceleration section arranged vertically. The lower end of the acceleration section is connected to the upper end of the deceleration section. The distance between two adjacent threaded grooves in the same direction on the acceleration section is greater than the distance between two adjacent threaded grooves in the same direction on the deceleration section.

[0044] When the moving nut 61 moves from the deceleration section to the acceleration section, it moves rapidly upward. Permanent magnet 3 65 moves above permanent magnet 2 54. The magnetic repulsion between permanent magnet 3 65 and permanent magnet 1 36 is greater than the magnetic attraction between permanent magnet 2 54 and permanent magnet 1 36. This magnetic difference drives the filter screen 31 upward. At this time, the moving nut 61 drives the filter screen 31 to move rapidly upward, increasing the collision intensity and helping to vibrate away stubborn impurities on the filter screen 31. The transmission rod 51 continues to rotate, and the moving nut 61 moves rapidly downward, further weakening the effect of permanent magnet 3 65. The magnetic repulsion between the filter screen 25 and the permanent magnet 36 helps to accelerate the rapid return of the filter screen 25 to its original position (which can prolong the rotation time of the filter screen 31 driven by the magnetic attraction of the permanent magnet 54, thereby avoiding the filter screen 31 being continuously washed multiple times due to the small rotation angle, and prolonging the time required for a full wash of the filter screen 31). When the moving nut 61 moves to the deceleration section, it decelerates and moves downward. When the moving nut 61 moves downward in the deceleration section and upward in the deceleration section, the filter screen 31 will return to its original position and rotate through the magnetic attraction.

[0045] It should be noted that the moving nut 61 moves for a shorter time during the acceleration phase than during the deceleration phase. This is to extend the rotation time of the permanent magnet 54, which drives the filter screen 31 to rotate through magnetic attraction.

[0046] As a preferred embodiment of this example, Figure 6 As shown, the acceleration section includes an upper acceleration section that drives the moving nut 61 to move upward and a lower acceleration section that drives the moving nut 61 to move downward. The distance between two adjacent threaded grooves in the upper acceleration section is smaller than the distance between two adjacent threaded grooves in the lower acceleration section. The purpose of this is to further accelerate the downward movement speed of the moving nut 61 in the acceleration section, quickly weaken the repulsive force generated on the falling filter screen 31, further accelerate the falling of the filter screen 31 (i.e., return to its original position), and ultimately further prevent the filter screen 31 from being continuously washed multiple times due to the small rotation angle, thus reducing the time required for a complete wash of the filter screen 31.

[0047] As a preferred embodiment of this example, Figure 3 and Figure 6 As shown, permanent magnet 1 36, permanent magnet 2 54 and permanent magnet 3 65 are all set inside the magnetic shield 2. The magnetic pole action end of the magnetic shield 2 is an open end. The magnetic shield 2 that is adapted to permanent magnet 1 36 and permanent magnet 2 54 has a circular structure, and the magnetic shield 2 that is adapted to permanent magnet 3 65 has a ring structure. The magnetic shield 2 shields the magnetic field to avoid magnetic field interference between the permanent magnets.

[0048] As a preferred embodiment of this example, Figure 7 As shown, each liquid storage chamber is provided with an arc-shaped liquid outlet 44 on its side end. The liquid outlet speed of the liquid outlet 44 is less than the liquid filling speed of the drain port of the valve body 1 to add liquid to the liquid storage chamber. When the valve body 1 stops draining downwards, the fluid remaining in its liquid storage chamber can be discharged through this liquid outlet 44, which is conducive to the complete drainage of the fluid in the liquid storage chamber.

[0049] As a preferred embodiment of this example, Figure 2 As shown, the lower end of the lower mounting ring 34 is located above the upper end of the support ring 38. Since the filter screen 31 is inclined and the lower end of the lower mounting ring 34 is located above the upper end of the support ring 38, a material leakage gap can be formed between the lower end of the lower mounting ring 34 and the support ring 38. This avoids the accumulation of impurities on the support ring 38, which would affect the normal rotation of the filter screen 31 and the impact strength (the accumulation of impurities on the support ring 38 is prone to collision buffering, which is not conducive to loosening the stubborn impurities on the filter screen 31).

[0050] As a preferred embodiment of this example, Figure 3 As shown, the upper and lower ends of the permanent magnet 36 are provided with conical guide blocks. The conical guide blocks are made of non-magnetic materials and play a guiding role, reducing the resistance encountered by the filter screen 31 when it moves up and down.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-cleaning integrated filter rubber flap check valve, comprising a valve body (1) with a valve flap (2) internally disposed and a filter component (3) disposed at an angle, wherein the drain port of the valve body (1) is disposed downwards, and the filter component (3) is hollow and open at both the upper and lower ends, characterized in that: Also includes The hydraulic drive unit (4) uses water to drive the filter component (3) to rotate inside the valve body (1). The fluid with a certain flow rate inside the valve body (1) impacts the inclined filter component (3), causing impurities on the impacted part of the filter component (3) to be washed away. Connector (5) is used to connect the filter component (3) and the hydraulic drive unit (4) for power transmission; The hydraulic drive unit (4) includes an installation pipe (41) connected to the drain port flange of the downwardly positioned valve body (1). The diameters of the upper and lower ends of the installation pipe (41) are both larger than the diameter of the drain port. The inner cavity of the installation pipe (41) is eccentrically mounted with a rotating shaft (42), and a hydraulic impeller (43) is mounted on the rotating shaft (42). The hydraulic impeller (43) has several liquid storage chambers arranged in a circular pattern. The filter component (3) includes an upper mounting ring (32) and a lower mounting ring (34) connected by multiple connecting rods (33). A hollow cylindrical filter screen (31) is movably arranged between the upper mounting ring (32) and the lower mounting ring (34). A ball bearing (35) is provided at the bottom of the filter screen (31), and the lower end of the ball bearing (35) contacts the upper end face of the support ring (38) provided below the lower mounting ring (34). The lower end of the lower mounting ring (34) is connected to the mounting flange (39) by multiple connecting rods (37). The support ring (38) is fixed to the multiple connecting rods (37). Adjacent connecting rods (37) are provided with a drop gap to allow impurities to fall. A circular permanent magnet (36) is installed at the axis near the bottom of the filter screen (31). The connector (5) includes a transmission rod (51) with the same inclination as the filter component (3). The lower end of the transmission rod (51) is movably connected to one end of the rotating shaft (42) that passes through the mounting tube (41) via a universal joint (52). The upper end of the transmission rod (51) passes through the magnetic shield (53) and extends into the circular cavity of the mounting flange (39). The magnetic shield (53) is fixedly installed on the mounting flange (39). The inner cavity of the circular cavity is equipped with a magnetic shield (311). The upper end of the transmission rod (51) is equipped with a circular permanent magnet (54). The permanent magnet (54) is arranged opposite to the permanent magnet (36), and the magnetic poles of the opposite ends of the permanent magnet (54) and the permanent magnet (36) are opposite. The bottom of the valve body (1) is provided with a slag receiving pipe (7), and a discharge valve (8) is installed on the slag receiving pipe (7). It also includes a collision unit (6) for causing the filter screen (31) on the filter component (3) to collide and promote the falling off of impurities on the filter screen (31); The collision unit (6) includes a reciprocating screw (62) integrally formed with the transmission rod (51). A movable nut (61) is sleeved on the reciprocating screw (62), and an annular plate (64) is installed on the upper end of the movable nut (61) through multiple columns. A ring-shaped permanent magnet three (65) is installed on the annular plate (64). The magnetic poles of the permanent magnet three (65) and the permanent magnet one (36) are the same at opposite ends. A limit plate is provided on the side end of the movable nut (61), and the limit plate is slidably sleeved on the limit post (63). The filter screen (31) is fixed with an annular plate at its upper end, and the annular plate is inserted into the annular cavity of the upper mounting ring (32). The inner wall of the annular cavity is provided with a plurality of ball bearings (310) that are in contact with the inner and outer walls of the annular plate.

2. The self-cleaning integrated filter rubber flap check valve according to claim 1, characterized in that: The reciprocating screw (62) is provided with an acceleration section and a deceleration section arranged vertically. The lower end of the acceleration section is connected to the upper end of the deceleration section. The distance between two adjacent threaded grooves in the same direction on the acceleration section is greater than the distance between two adjacent threaded grooves in the same direction on the deceleration section.

3. The self-cleaning integrated filter rubber flap check valve according to claim 2, characterized in that: The acceleration section includes an upper acceleration section that drives the movable nut (61) to move upward and a lower acceleration section that drives the movable nut (61) to move downward. The distance between two adjacent threaded grooves in the upper acceleration section is smaller than the distance between two adjacent threaded grooves in the lower acceleration section.

4. The self-cleaning integrated filter rubber flap check valve according to claim 1, characterized in that: The first permanent magnet (36), the second permanent magnet (54), and the third permanent magnet (65) are all disposed inside the second magnetic shield. The magnetic pole end of the second magnetic shield is an open end. The second magnetic shield that is adapted to the first permanent magnet (36) and the second permanent magnet (54) is a circular structure, and the second magnetic shield that is adapted to the third permanent magnet (65) is an annular structure.

5. The self-cleaning integrated filter rubber flap check valve according to claim 1, characterized in that: Each of the liquid storage chambers is provided with an arc-shaped liquid outlet (44) at its side end. The liquid outlet speed of the liquid outlet (44) is less than the liquid addition speed of the valve body (1) drain port to the liquid storage chamber.

6. The self-cleaning integrated filter rubber flap check valve according to claim 1, characterized in that: The lower end of the lower mounting ring (34) is located above the upper end of the support ring (38).

7. The self-cleaning integrated filter rubber flap check valve according to claim 1, characterized in that: The permanent magnet (36) is provided with tapered guide blocks at both the upper and lower ends, and the tapered guide blocks are made of non-magnetic materials.

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