Filtering device and fixed ball valve

Abstract

The invention relates to the field of filtering equipment, in particular to a filtering device and a fixed ball valve.The filtering device comprises a machine head, the machine head is provided with a water inlet end, a water outlet pipe and a mounting end, a filtering cylinder and an outer cover are mounted at the mounting end of the machine head, the filtering cylinder is located in the outer cover, and the water inlet end of the machine head communicates with the interior of the filtering cylinder; the water outlet end of the machine head is communicated with the interior of the outer cover, a filter plate is installed on the bottom side of the filter cartridge, a rotating rod is rotationally inserted into the filter plate, a cleaning brush is arranged in the filter cartridge and used for cleaning the inner side wall of the filter cartridge, a connecting rod is installed between the cleaning brush and the rotating rod, and the connecting rod is connected with the outer cover. The filter cartridge is provided with a rotating mechanism, and the rotating mechanism is used for driving the rotating rod to rotate. The filter cartridge has the effect of conveniently cleaning impurities on the inner wall of the filter cartridge.

Description

Technical Field

[0001] The present application relates to the field of filtering equipment, and in particular to a filtering device and a fixed ball valve. Background Art

[0002] As a key fluid control device, the trunnion-mounted ball valve plays an important role in household and industrial applications. For occasions with high water quality requirements, the trunnion-mounted ball valve will purify the water through built-in or external filtering devices to ensure the safety of drinking water and reduce the impact of impurities on subsequent water-using equipment.

[0003] In practical applications, common filtering devices mainly include a machine head, a filter cartridge, and an outer cover. The machine head is provided with a water inlet, a water outlet pipe, and a mounting end, and the filter cartridge is installed inside the outer cover and connected to the water outlet of the fixed ball valve through the water inlet of the machine head. Water flows from the fixed ball valve to the water inlet of the machine head, and then flows into the filter cartridge. After being filtered by the filter cartridge, the water flows into the outer cover, and then the water inside the outer cover is discharged from the water outlet of the machine head.

[0004] Although the above method solves the water purification problem to a certain extent, it still faces a significant technical difficulty. After long-term use, impurities will accumulate on the wall of the filter cartridge, and the impurities will hinder the flow of water. Summary of the invention

[0005] In order to facilitate the cleaning of impurities on the inner wall of the filter cartridge, the present application provides a filter device and a fixed ball valve.

[0006] The present application provides a filtering device and a fixed ball valve, which adopt the following technical solutions: A filtering device comprises a machine head, the machine head has a water inlet end, a water outlet pipe and a mounting end, the mounting end of the machine head is equipped with a filter cartridge and an outer cover, the filter cartridge is located inside the outer cover, the water inlet end of the machine head is communicated with the inside of the filter cartridge, the water outlet end of the machine head is communicated with the inside of the outer cover, a filter plate is installed on the bottom side of the filter cartridge, a rotating rod is rotatably plugged into the filter plate, a cleaning brush is arranged inside the filter cartridge, the cleaning brush is used to clean the inner side wall of the filter cartridge, a connecting rod is installed between the cleaning brush and the rotating rod, and a rotating mechanism is installed on the filter cartridge, and the rotating mechanism is used to drive the rotating rod to rotate.

[0007] By adopting the above technical solution, the rotating mechanism drives the rotating rod to rotate, thereby driving the connecting rod and the cleaning brush to move synchronously. When the cleaning brush rotates, it scrapes off the impurities on the inner wall of the filter cartridge, thereby effectively removing the impurities attached to the inner wall of the filter cartridge.

[0008] Optionally, the rotating mechanism includes a lifting assembly, a mounting cover, a first driving block and a guide block, the mounting cover is mounted on the bottom side of the filter plate, the first driving block is fixedly mounted on the bottom end of the rotating rod, the guide block is fixedly mounted on the peripheral side of the first driving block, the inner peripheral wall of the mounting cover is provided with a guide groove for the guide block to slide, the guide groove is repeatedly bent, the lifting assembly is mounted on the mounting cover, and the lifting assembly is used to drive the first driving block to rise and fall.

[0009] By adopting the above technical solution, the lifting assembly drives the first driving block to lift, and the first driving block drives the guide block to lift. When the guide block is lifted, it slides inside the guide groove and is guided by the repeated bending of the guide groove, so that the first driving block rotates when it is lifted. When the first driving block is lifted and rotated, it drives the rotating rod to rotate, thereby facilitating the rotation of the rotating rod.

[0010] Optionally, the lifting assembly includes a diaphragm, a second drive block, a spring and a telescopic rod, one end of the telescopic rod is fixedly connected to the inner bottom wall of the mounting cover, the other end of the telescopic rod is fixedly connected to the second drive block, the peripheral side of the diaphragm is fixedly connected to the inner wall of the mounting cover, and the diaphragm is fixedly installed between the first drive block and the second drive block, the spring is sleeved on the telescopic rod, and the spring is used to drive the second drive block to move toward the filter cylinder.

[0011] By adopting the above technical solution, the water pressure inside the machine head will change when using water and when not using water, thereby changing the pressure on the diaphragm. When the pressure on the diaphragm is greater than the elastic force of the spring, the diaphragm drives the first drive block and the second drive block to squeeze the spring, thereby facilitating the driving of the rotating rod to descend; when the pressure on the diaphragm is less than the elastic force of the spring, the spring restores its deformation, thereby causing the first drive block and the second drive block to rise, thereby facilitating the driving of the rotating rod to rise.

[0012] Optionally, a push block is fixedly mounted on the inner side wall of the bend of the guide groove, and the push block is arc-shaped.

[0013] By adopting the above technical solution, when the guide frame moves to the bending position of the guide groove, the push block squeezes the guide block, thereby facilitating the guide block to move along one direction of the guide groove.

[0014] Optionally, a rotating ring is fixedly installed at one end of the connecting rod away from the rotating rod, the cleaning brush is rotatably inserted into the rotating ring, a gear is fixedly installed at the bottom end of the cleaning brush, and a protrusion is installed on the inner wall of the filter cylinder, and the protrusion is used to push the gear to rotate.

[0015] By adopting the above technical solution, when the cleaning brush rotates with the rotating rod as the axis to clean the inner wall of the filter cartridge, the cleaning brush will drive the protrusion to contact the gear, so that the cleaning brush rotates with its own central axis. When the side of the cleaning brush with bristles is away from the inner wall of the filter cartridge, the cleaning brush will not clean the filter cartridge when rotating with the rotating rod as the axis; when the side of the cleaning brush with bristles is facing the inner wall of the filter cartridge, the cleaning brush will clean the filter cartridge when rotating with the rotating rod as the axis, thereby conveniently reducing the frequency of cleaning the filter cartridge with the cleaning brush, thereby extending the service life of the cleaning brush.

[0016] Optionally, a screw groove is provided on the inner wall of the filter cartridge, one side of the protrusion is conical, and the other side of the protrusion is cylindrical, and a cylindrical portion of the protrusion is threadedly inserted into the screw groove.

[0017] By adopting the above technical solution, the protrusion is rotated in and out of the screw groove, so as to facilitate the adjustment of the length of the protrusion extending out of the screw groove. By adjusting the length of the protrusion extending out of the screw groove, it is convenient to adjust the angle of rotation of the gear when the protrusion and the gear are squeezed against each other, thereby facilitating the adjustment of the frequency of cleaning the filter cartridge by the cleaning brush.

[0018] Optionally, a limit frame is fixedly installed on one end of the connecting rod close to the rotating rod, the cross-section of the part of the rotating rod that is rotatably inserted into the filter plate is circular, the cross-section of the part of the rotating rod located inside the filter cylinder is rectangular, and the limit frame is slidably sleeved on the part of the rotating rod located inside the filter cylinder.

[0019] By adopting the above technical solution, when the lifting mechanism drives the rotating rod to rise and fall, the limit frame slides on the rotating rod, so that the cleaning brush does not rise and fall with the rotating rod. By not raising and lowering the cleaning brush, the blind area of ​​the cleaning brush in cleaning the filter cartridge is reduced.

[0020] Optionally, a dirt collecting cover is fixedly installed on the bottom side of the filter plate, the filter plate is provided with a dirt discharge port connected to the dirt collecting cover, the side wall of the dirt collecting cover is fixedly connected with a dirt discharge pipe, one end of the dirt discharge pipe away from the dirt collecting cover is fixedly passed through the outer cover, a joint is fixedly installed on one end of the dirt discharge pipe away from the dirt collecting cover, a sealing ring is fixedly installed on one end of the joint away from the dirt discharge pipe, a sealing block is fixedly installed on the outer wall of the outer cover, the sealing block is provided with a sealing groove, the joint is threadedly inserted into the sealing groove, and the sealing ring is tightly against the bottom of the sealing groove.

[0021] By adopting the above technical solution, the cleaning brush brushes off the impurities on the filter cartridge, and the impurities fall into the filter. When the rotating rod drives the cleaning brush to rotate through the connecting rod, the connecting rod scrapes the impurities toward the sewage outlet, and then the impurities fall into the sewage collecting cover from the sewage outlet. Then the impurities inside the sewage collecting cover are discharged from the sewage pipe.

[0022] Optionally, the inner bottom wall of the dirt collecting cover is gradually raised and inclined from one side close to the sewage discharge pipe to the other side.

[0023] By adopting the above technical solution, the impurities inside the dirt collecting hood are guided by the inclined bottom wall of the dirt collecting hood to flow toward the sewage pipe, thereby facilitating the impurities inside the dirt collecting hood to be discharged from the sewage pipe.

[0024] A fixed ball valve comprises a ball valve body, wherein the water inlet end of the ball valve body is used to be connected to a water source, and the water outlet end of the ball valve body is used to be connected to the water inlet end of a machine head.

[0025] By adopting the above technical solution, In summary, the present application includes at least one of the following beneficial technical effects: The rotating mechanism drives the rotating rod to rotate, and the cleaning brush can automatically clean the inner wall of the filter cartridge as the rotating rod rotates, thereby facilitating the cleaning of impurities on the inner wall of the filter cartridge; The gear and the convex block cooperate to realize the self-rotation of the cleaning brush, thereby facilitating the adjustment of the cleaning frequency of the cleaning brush on the filter cartridge; The design of the dirt collection hood and drain pipe facilitates the collection and discharge of impurities generated during the filtration process, avoiding secondary pollution while ensuring the long-term operational stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the connection between the filter device and the fixed ball valve in the embodiment of the present application; Figure 2 is a schematic structural diagram of a filtering device according to an embodiment of the present application; Figure 3 yes Figure 2 Sectional view at AA; Figure 4 yes Figure 3 A magnified view at point A; Figure 5 yes Figure 2 Cross-sectional view at BB; Figure 6 yes Figure 5 Enlarged view at B; Figure 7 yes Figure 5 Enlarged view at C.

[0027] Explanation of the accompanying drawings: 1. ball valve body; 2. machine head; 3. filter cartridge; 4. outer cover; 5. rotating rod; 6. connecting rod; 7. limit frame; 8. blocking groove; 9. cleaning brush; 10. rotating ring; 11. rotating mechanism; 111. lifting assembly; 1111. diaphragm; 1112. second drive block; 1113. spring; 1114. telescopic rod; 112. mounting cover; 113. first drive block; 114. guide block; 12. guide groove; 13. push block; 14. gear; 15. protrusion; 16. screw groove; 17. dirt collecting cover; 18. drain port; 19. drain pipe; 20. joint; 21. sealing ring; 22. blocking block; 23. filter plate. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-7 This application is described in further detail.

[0029] The embodiments of the present application disclose a filtering device and a fixed ball valve.

[0030] Reference Figure 1 A fixed ball valve comprises a ball valve body 1, a water inlet end of the ball valve body 1 is connected to a water source, so as to conveniently control the water supply and water cutoff of the water source.

[0031] Reference Figure 1 , Figure 2 A filtering device includes a head 2, the head 2 has a water inlet end, a water outlet pipe and a mounting end, the water inlet end of the head 2 is connected to the water outlet end of the ball valve body 1, and the water discharged from the water outlet end of the head 2 is used.

[0032] Reference Figure 3 , the mounting end of the machine head 2 is equipped with a filter cartridge 3 and an outer cover 4, and the filter cartridge 3 is located inside the outer cover 4. In the embodiment of the present application, the filter cartridge 3 and the outer cover 4 are screwed into the mounting end of the machine head 2 and sealed with an O-ring, so as to facilitate the removal of the filter cartridge 3 and the outer cover 4 for cleaning. In another embodiment, the mounting end of the machine head 2 is preset with a buckle, and the filter cartridge 3 and the outer cover 4 are installed on the mounting end of the machine head 2 by the buckle. A filter plate 23 is installed on the bottom side of the filter cartridge 3.

[0033] The water inlet of the head 2 is connected to the inside of the filter cartridge 3, and the water outlet of the head 2 is connected to the inside of the outer cover 4. Water enters the water inlet of the head 2 from the ball valve body 1, and the water at the water inlet of the head 2 first enters the inside of the filter cartridge 3, and the filter cartridge 3 filters the water and then discharges it into the inside of the outer cover 4. The water inside the outer cover 4 is discharged from the water outlet of the head 2 for use.

[0034] Reference Figure 3 , Figure 4The filter plate 23 is provided with a rotating rod 5, a portion of which is circular in cross section and is rotatably inserted in the middle of the filter plate 23, and another portion of which is rectangular in cross section and is located inside the filter cartridge 3. The rotating rod 5 is provided with a connecting rod 6. A limit frame 7 is fixedly installed at one end of the connecting rod 6, and the limit frame 7 is slidably sleeved on the portion of the rotating rod 5 located inside the filter cartridge 3.

[0035] Reference Figure 3 , Figure 4 A cleaning brush 9 is provided inside the filter cartridge 3, and a rotating ring 10 is fixedly installed at one end of the connecting rod 6 away from the limiting frame 7, and the cleaning brush 9 is rotatably inserted into the rotating ring 10. In the embodiment of the present application, one side of the cleaning brush 9 has bristles, and the other side of the cleaning brush 9 has no bristles. The cleaning brush 9 is vertically arranged on the inner wall of the filter cartridge 3. When the cleaning brush 9 transfers the bristles toward the inner wall of the filter cartridge 3 by itself, the bristles of the cleaning brush 9 abut against the inner wall of the filter cartridge 3, thereby facilitating the cleaning brush 9 to clean the inner wall of the filter cartridge 3; when the cleaning brush 9 transfers the bristles away from the inner wall of the filter cartridge 3 by itself, the cleaning brush 9 is separated from the inner wall of the filter cartridge 3, and the cleaning brush 9 stops cleaning the inner wall of the filter cartridge 3.

[0036] Reference Figure 3 , Figure 4 The filter cartridge 3 is equipped with a rotating mechanism 11, and the rotating mechanism 11 includes a lifting assembly 111, a mounting cover 112, a first driving block 113 and a guide block 114. The mounting cover 112 is installed on the bottom side of the filter plate 23, and the top surface and the ground of the filter plate 23 are both provided with protrusions for screwing into the mounting cover 112 and the filter cartridge 3, so as to facilitate the disassembly and cleaning of the filter cartridge 3. The first driving block 113 is fixedly installed at the bottom end of the rotating rod 5, and the guide block 114 is fixedly installed on the peripheral side of the first driving block 113. The inner peripheral wall of the mounting cover 112 is provided with a guide groove 12 for the guide block 114 to slide, and the guide groove 12 is repeatedly bent. The inner side wall of the bend of the guide groove 12 is fixedly installed with a push block 13, and the push block 13 is arc-shaped.

[0037] The lifting assembly 111 is used to drive the first driving block 113 to lift. When the first driving block 113 is lifted, it drives the guide block 114 and the rotating rod 5 to lift. When the guide block 114 is lifted, it will slide inside the guide groove 12. The guide block 114 is guided by the repeated bending of the guide groove 12, thereby driving the first driving block 113 to rotate, and the first driving block 113 drives the rotating rod 5 to rotate. The rotating rod 5 drives the cleaning brush 9 to rotate around the rotating rod 5 as the axis through the limit frame 7, the connecting rod 6 and the rotating ring 10, so as to facilitate the cleaning brush 9 to clean the inner wall of the filter cylinder 3. At the same time, the limit frame 7 will lift and slide on the rotating rod 5, so that the cleaning brush 9 will not lift and lower with the rotating rod 5, thereby reducing the blind area of ​​the cleaning brush 9 cleaning the inside of the filter cylinder 3.

[0038] When the guide block 114 slides inside the guide groove 12, the guide block 114 and the push block 13 are pressed against each other. The push block 13 guides the guide block 114 to move in one direction inside the guide groove 12, thereby reducing the situation where the rotating rod 5 rotates back and forth.

[0039] Reference Figure 3 , Figure 4 The lifting assembly 111 includes a diaphragm 1111, a second driving block 1112, a spring 1113 and a telescopic rod 1114. One end of the telescopic rod 1114 is fixedly connected to the inner bottom wall of the mounting cover 112, and the other end of the telescopic rod 1114 is fixedly connected to the second driving block 1112. The peripheral side of the diaphragm 1111 is fixedly connected to the inner wall of the mounting cover 112, and the diaphragm 1111 is fixedly installed between the first driving block 113 and the second driving block 1112. The spring 1113 is sleeved on the telescopic rod 1114.

[0040] The water source, the fixed ball valve and the filter device are connected in sequence for water supply. The water pressure on the diaphragm 1111 will change when water is used and when water is not used. When the water pressure on the diaphragm 1111 is greater than the elastic force of the spring 1113, the diaphragm 1111 moves away from the filter cartridge 3, thereby driving the first drive block 113 and the second drive block 1112 to move away from the filter cartridge 3; when the water pressure on the diaphragm 1111 is less than the elastic force of the spring 1113, the spring 1113 pushes the diaphragm 1111 and the second drive block 1112 toward the filter cartridge 3 through the second drive block 1112. The first drive block 113 is moved back and forth by the water pressure, thereby facilitating the first drive block 113 to be raised and lowered.

[0041] Reference Figure 3 , Figure 4 A gear 14 is fixedly mounted at the bottom end of the cleaning brush 9, and a protrusion 15 is provided inside the filter cartridge 3. One side of the protrusion 15 is conical, and the other side of the protrusion 15 is cylindrical. A screw groove 16 is provided on the inner wall of the filter cartridge 3, and the cylindrical part of the protrusion 15 is threadedly penetrated into the screw groove 16. Generally, the wall of the filter cartridge 3 is thin, and can be separately thickened at the position where the screw groove 16 is required. If the wall thickness of the filter cartridge 3 is sufficient, the screw groove 16 can be directly provided on the wall of the filter cartridge 3.

[0042] When the cleaning brush 9 rotates around the rotating rod 5 , the gear 14 and the projection 15 press each other, so that the cleaning brush 9 rotates around itself, thereby changing the direction of the side of the cleaning brush 9 with bristles.

[0043] When the bristles on the cleaning brush 9 face the inner wall of the filter cartridge 3, the cleaning brush 9 rotates with the rotating rod 5 as the axis to clean the inner wall of the filter cartridge 3. When the bristles on the cleaning brush 9 face away from the inner wall of the filter cartridge 3, the cleaning brush 9 rotates with the rotating rod 5 as the axis without cleaning the inner wall of the filter cartridge 3. It takes a certain amount of time for impurities on the inner wall of the filter cartridge 3 to accumulate. Through the cooperation of the protrusion 15 and the gear 14, the frequency of cleaning the filter cartridge 3 by the cleaning brush 9 is reduced, thereby increasing the service life of the cleaning brush 9. The protrusion 15 is screwed in or out of the screw groove 16, thereby adjusting the length of the protrusion 15 outside the screw groove 16, thereby facilitating the adjustment of the frequency of cleaning the inner wall of the filter cartridge 3 by the cleaning brush 9.

[0044] Reference Figure 5 , Figure 6 , Figure 7 A dirt collecting cover 17 is fixedly mounted on the bottom side of the filter plate 23, and a sewage outlet 18 connected to the dirt collecting cover 17 is provided on the filter plate 23. A sewage discharge pipe 19 is fixedly connected to the side wall of the dirt collecting cover 17, and the end of the sewage discharge pipe 19 away from the dirt collecting cover 17 is fixedly penetrated through the mounting cover 112 and the outer cover 4 and then enters the outside of the outer cover 4. A joint 20 is fixedly mounted on the end of the sewage discharge pipe 19 away from the dirt collecting cover 17, and a sealing ring 21 is fixedly mounted on the end of the joint 20 away from the sewage discharge pipe 19. A blocking block 22 is fixedly mounted on the outer wall of the outer cover 4, and a blocking groove 8 is provided in the blocking block 22. The joint 20 is threadedly inserted into the inside of the sealing groove 8, and the sealing ring 21 is tightly against the bottom of the sealing groove 8. The inner bottom wall of the dirt collecting cover 17 is gradually raised from one side close to the sewage discharge pipe 19 to the other side and is inclined.

[0045] After the cleaning brush 9 cleans the inside of the filter cartridge 3, the impurities fall into the filter plate 23. When the rotating rod 5 drives the connecting rod 6 to rotate, the connecting rod 6 will scrape the impurities on the filter plate 23 and move the impurities, allowing the impurities to enter the inside of the dirt collecting cover 17 from the sewage outlet 18. When it is necessary to discharge the impurities, the joint 20 is taken out from the blocking groove 8, and the impurities inside the dirt collecting cover 17 are guided by the tilt of the inner bottom wall of the dirt collecting cover 17, and the impurities are discharged from the sewage pipe 19. After the impurities are discharged, the joint 20 is reinserted into the blocking groove 8 for sealing.

[0046] In the present application, the diaphragm 1111 will reciprocate, so that the water inside the mounting cover 112 flows from the filter plate 23 to the filter cartridge 3, or the water inside the filter cartridge 3 flows from the filter plate 23 to the inside of the mounting cover 112. The water flow has the effect of flushing and preventing the holes on the filter plate 23 from being blocked. When the connecting rod 6 scrapes the impurities on the filter plate 23 toward the sewage outlet 18, the connecting rod 6 does not need to be pressed against the filter plate 23, and a gap is left between the connecting rod 6 and the filter plate 23, thereby reducing the friction damage between the connecting rod 6 and the filter plate 23. At the same time, the amount of impurities remaining on the filter plate 23 is small, and the reciprocating movement of the diaphragm 1111 drives the water flow to flush the filter plate 23.

[0047] The implementation principle of a filter device and a fixed ball valve in the embodiment of the present application is as follows: as the water pressure changes before and after water is used, the lifting assembly 111 drives the first driving block 113 to rise and fall. When the first driving block 113 rises and falls, the guide block 114 cooperates with the guide groove 12, so that the first driving block 113 rotates. The first driving block 113 drives the rotating rod 5 to rotate, and the rotating rod 5 drives the cleaning brush 9 to rotate, so as to facilitate cleaning of impurities on the inner wall of the filter cylinder 3.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A filtering device, characterized in that: The machine head (2) comprises a water inlet end, a water outlet pipe and a mounting end. The mounting end of the machine head (2) is mounted with a filter cartridge (3) and an outer cover (4). The filter cartridge (3) is located inside the outer cover (4). The water inlet end of the machine head (2) is in communication with the inside of the filter cartridge (3). The water outlet end of the machine head (2) is in communication with the inside of the outer cover (4). A filter plate (23) is mounted on the bottom side of the filter cartridge (3). A rotating rod (5) is rotatably plugged into the filter plate (23). A cleaning brush (9) is arranged inside the filter cartridge (3). The cleaning brush (9) is used to clean the inner side wall of the filter cartridge (3). A connecting rod (6) is mounted between the cleaning brush (9) and the rotating rod (5). A rotating mechanism (11) is mounted on the filter cartridge (3). The rotating mechanism (11) is used to drive the rotating rod (5) to rotate. The rotating mechanism (11) comprises a lifting assembly (111), a mounting cover (112), a first driving block (113) and a guide block (114); the mounting cover (112) is mounted on the bottom side of the filter plate (23); the first driving block (113) is fixedly mounted on the bottom end of the rotating rod (5); the guide block (114) is fixedly mounted on the peripheral side of the first driving block (113); an inner peripheral wall of the mounting cover (112) is provided with a guide groove (12) for the guide block (114) to slide; the guide groove (12) is repeatedly bent; the lifting assembly (111) is mounted on the mounting cover (112); and the lifting assembly (111) is used to drive the first driving block (113) to move up and down.

2. A filtering device according to claim 1, characterized in that: The lifting assembly (111) comprises a diaphragm (1111), a second driving block (1112), a spring (1113) and a telescopic rod (1114); one end of the telescopic rod (1114) is fixedly connected to the inner bottom wall of the mounting cover (112); the other end of the telescopic rod (1114) is fixedly connected to the second driving block (1112); the peripheral side of the diaphragm (1111) is fixedly connected to the inner wall of the mounting cover (112); the diaphragm (1111) is fixedly installed between the first driving block (113) and the second driving block (1112); the spring (1113) is sleeved on the telescopic rod (1114); and the spring (1113) is used to drive the second driving block (1112) to move toward the filter cartridge (3).

3. A filtering device according to claim 1, characterized in that: A push block (13) is fixedly mounted on the inner side wall of the bend of the guide groove (12), and the push block (13) is arc-shaped.

4. A filtering device according to claim 1, characterized in that: A rotating ring (10) is fixedly mounted on one end of the connecting rod (6) away from the rotating rod (5); the cleaning brush (9) is rotatably mounted on the rotating ring (10); a gear (14) is fixedly mounted on the bottom end of the cleaning brush (9); a protrusion (15) is mounted on the inner wall of the filter cylinder (3); the protrusion (15) is used to push the gear (14) to rotate.

5. A filtering device according to claim 4, characterized in that: The inner wall of the filter cartridge (3) is provided with a screw groove (16); one side of the protrusion (15) is conical, and the other side of the protrusion (15) is cylindrical; a threaded portion of the cylindrical portion of the protrusion (15) is threadedly inserted into the screw groove (16).

6. A filtering device according to claim 1, characterized in that: A limit frame (7) is fixedly mounted on one end of the connecting rod (6) close to the rotating rod (5); the cross section of the portion of the rotating rod (5) that is rotatably inserted into the filter plate (23) is circular; the cross section of the portion of the rotating rod (5) located inside the filter cartridge (3) is rectangular; and the limit frame (7) is slidably sleeved on the portion of the rotating rod (5) located inside the filter cartridge (3).

7. A filtering device according to claim 6, characterized in that: A dirt collecting cover (17) is fixedly mounted on the bottom side of the filter plate (23); a dirt discharge port (18) communicating with the dirt collecting cover (17) is formed on the filter plate (23); a dirt discharge pipe (19) is fixedly connected to the side wall of the dirt collecting cover (17); one end of the dirt discharge pipe (19) away from the dirt collecting cover (17) is fixedly penetrated through the outer cover (4); a joint (20) is fixedly mounted on the end of the dirt discharge pipe (19) away from the dirt collecting cover (17); a sealing ring (21) is fixedly mounted on the end of the joint (20) away from the dirt discharge pipe (19); a blocking block (22) is fixedly mounted on the outer wall of the outer cover (4); the blocking block (22) is formed with a blocking groove (8); the joint (20) is threadedly inserted into the inside of the blocking groove (8); and the sealing ring (21) is tightly against the bottom of the blocking groove (8).

8. A filtering device according to claim 7, characterized in that: The inner bottom wall of the dirt collecting cover (17) is gradually raised and inclined from one side close to the sewage discharge pipe (19) to the other side.

9. A fixed ball valve, using a filtering device as claimed in any one of claims 1 to 8, characterized in that: It comprises a ball valve body (1), wherein the water inlet end of the ball valve body (1) is used to be connected to a water source, and the water outlet end of the ball valve body (1) is used to be connected to the water inlet end of a machine head (2).

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