A filtering device and a fixed ball valve

Abstract

This application relates to the field of filtration equipment, and particularly to a filtration device and a fixed ball valve, including a machine head. The machine head has a water inlet end, a water outlet pipe, and a mounting end. A filter cylinder and an outer cover are installed at the mounting end of the machine head. The filter cylinder is located inside the outer cover. The water inlet end of the machine head is communicated with the inside of the filter cylinder, and 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 cylinder. A rotating rod is rotatably inserted into the filter plate. A cleaning brush is arranged inside the filter cylinder. The cleaning brush is used to clean the inner side wall of the filter cylinder. A connecting rod is installed between the cleaning brush and the rotating rod. The filter cylinder is equipped with a rotating mechanism, and the rotating mechanism is used to drive the rotating rod to rotate. This application has the effect of facilitating the cleaning of impurities on the inner wall of the filter cylinder.

Description

Technical Field

[0001] This application relates to the field of filtering devices, and particularly to a filtering device and a fixed ball valve. Background Art

[0002] As a key fluid control device, the fixed ball valve plays an important role in household and industrial applications. In occasions with high water quality requirements, the fixed ball valve will purify the water quality through an internal or external filtering device 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 parts such as a machine head, a filter cartridge, and an outer cover. The machine head is provided with a water inlet end, a water outlet pipe, and a mounting end. The filter cartridge is installed inside the outer cover and is connected to the water outlet end of the fixed ball valve through the water inlet end of the machine head. Water flows from the fixed ball valve to the water inlet end of the machine head, and then the water enters the filter cartridge. After the water is filtered by the filter cartridge, it flows into the inside of the outer cover, and then the water inside the outer cover is discharged from the water outlet end of the machine head.

[0004] Although the above method solves the problem of water purification to a certain extent, there is still a significant technical problem. After long-term use, impurities will accumulate on the inner 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, this application provides a filtering device and a fixed ball valve.

[0006] The filtering device and fixed ball valve provided by this application adopt the following technical solutions:

[0007] A filtering device includes 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 installed 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, and 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 rotationally inserted into the filter plate. A cleaning brush is arranged inside the filter cartridge. The cleaning brush is used for cleaning the inner side wall of the filter cartridge. A connecting rod is installed between the cleaning brush and the rotating rod. The filter cartridge is installed with a rotating mechanism, and the rotating mechanism is used to drive the rotating rod to rotate.

[0008] By adopting the above technical solutions, 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 will scrape off the impurities on the inner wall of the filter cartridge, thereby effectively removing the impurities attached to the inner side wall of the filter cartridge.

[0009] Optionally, the rotating mechanism includes a lifting assembly, a mounting cover, a first driving block, and a guiding block. The mounting cover is installed on the bottom side of the filter plate. The first driving block is fixedly installed at the bottom end of the rotating rod. The guiding block is fixedly installed on the periphery of the first driving block. A guiding groove for the guiding block to slide is formed on the inner peripheral wall of the mounting cover. The guiding groove is repeatedly bent. The lifting assembly is installed on the mounting cover and is used to drive the first driving block to move up and down.

[0010] By adopting the above technical solution, the lifting assembly drives the first driving block to move up and down, and the first driving block drives the guiding block to move up and down. When the guiding block moves up and down, it slides inside the guiding groove and is guided by the repeated bending of the guiding groove, so that the first driving block will rotate when moving up and down. When the first driving block moves up and down and rotates, it will drive the rotating rod to rotate, thus facilitating the driving of the rotating rod to rotate.

[0011] Optionally, the lifting assembly includes a diaphragm, a second driving 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, and the other end of the telescopic rod is fixedly connected to the second driving block. The periphery of the diaphragm is fixedly connected to the inner wall of the mounting cover, and the diaphragm is fixedly installed between the first driving block and the second driving block. The spring is sleeved on the telescopic rod, and the spring is used to drive the second driving block to move towards the filter cartridge.

[0012] By adopting the above technical solution, when water is used and not used, the water pressure inside the machine head will change, thereby changing the pressure received by the diaphragm. When the pressure received by the diaphragm is greater than the elastic force of the spring, the diaphragm drives the first driving block and the second driving block to compress the spring, thus facilitating the driving of the rotating rod to descend; when the pressure received by the diaphragm is less than the elastic force of the spring, the spring restores its deformation, so that the first driving block and the second driving block rise, thus facilitating the driving of the rotating rod to rise.

[0013] Optionally, push blocks are fixedly installed on the inner side walls at the bent portions of the guiding groove, and the push blocks are arc-shaped.

[0014] By adopting the above technical solution, when the guiding frame moves to the bent portion of the guiding groove, the push block presses the guiding block, thus facilitating the guiding block to move in one direction along the guiding groove.

[0015] Optionally, a rotating ring is fixedly installed at one end of the connecting rod away from the rotating rod. The cleaning brush rotates through the rotating ring. A gear is fixedly installed at the bottom end of the cleaning brush. A convex block is installed on the inner wall of the filter cartridge, and the convex block is used to push the gear to rotate.

[0016] By adopting the above technical solution, when the cleaning brush rotates around the rotating rod to clean the inner wall of the filter cylinder, the cleaning brush will drive the convex block to contact the gear, so that the cleaning brush rotates around its own central axis. When the side of the cleaning brush with bristles faces away from the inner wall of the filter cylinder, the rotation of the cleaning brush around the rotating rod will not clean the filter cylinder; when the side of the cleaning brush with bristles faces the inner wall of the filter cylinder, the rotation of the cleaning brush around the rotating rod will clean the filter cylinder, thus facilitating the reduction of the cleaning frequency of the cleaning brush on the filter cylinder, and further extending the service life of the cleaning brush.

[0017] Optionally, a spiral groove is provided on the inner wall of the filter cylinder. One side of the convex block is conical, and the other side of the convex block is cylindrical. The cylindrical part of the convex block is threadedly inserted into the spiral groove.

[0018] By adopting the above technical solution, the convex block is rotated in and out of the spiral groove, so as to conveniently adjust the length of the part of the convex block extending out of the spiral groove. By adjusting the length of the part of the convex block extending out of the spiral groove, it is convenient to adjust the rotation angle of the gear when the convex block and the gear are mutually extruded, and further convenient to adjust the cleaning frequency of the cleaning brush on the filter cylinder.

[0019] Optionally, a limiting frame is fixedly installed at one end of the connecting rod close to the rotating rod. The cross-section of the part of the rotating rod rotatably inserted into the filter plate is circular, and the cross-section of the part of the rotating rod located inside the filter cylinder is rectangular. The limiting frame is slidably sleeved on the part of the rotating rod located inside the filter cylinder.

[0020] By adopting the above technical solution, when the lifting mechanism drives the rotating rod to lift, the limiting frame slides on the rotating rod, so that it is convenient for the cleaning brush not to lift with the rotating rod. By the non-lifting of the cleaning brush, the blind area in the cleaning of the filter cylinder by the cleaning brush is reduced.

[0021] Optionally, a sewage collection cover is fixedly installed on the bottom side of the filter plate. The filter plate is provided with a sewage discharge port communicating with the sewage collection cover. The side wall of the sewage collection cover is fixedly connected with a sewage discharge pipe. One end of the sewage discharge pipe far away from the sewage collection cover fixedly penetrates through the outer cover. One end of the sewage discharge pipe far away from the sewage collection cover is fixedly installed with a connector. One end of the connector far away from the sewage discharge pipe is fixedly installed with a sealing ring. A blocking block is fixedly installed on the outer wall of the outer cover. The blocking block is provided with a blocking groove. The connector is threadedly inserted into the inside of the blocking groove, and the sealing ring abuts against the bottom of the blocking groove.

[0022] By adopting the above technical solution, after the cleaning brush brushes off the impurities on the filter cylinder, the impurities fall onto the filter. During the process that the rotating rod drives the cleaning brush to rotate through the connecting rod, the connecting rod will scrape the impurities towards the sewage discharge port, and then the impurities fall into the sewage collection cover from the sewage discharge port. Then the impurities inside the sewage collection cover are discharged from the sewage discharge pipe.

[0023] Optionally, the inner bottom wall of the dirt collecting cover is inclined and gradually rises from one side close to the sewage discharge pipe to the other side.

[0024] By adopting the above technical solution, the impurities inside the dirt collecting cover are guided by the inclination of the inner bottom wall of the dirt collecting cover to flow towards the sewage discharge pipe, thus facilitating the discharge of the impurities inside the dirt collecting cover from the sewage discharge pipe.

[0025] A fixed ball valve includes a ball valve body. The water inlet end of the ball valve body is used to connect to a water source, and the water outlet end of the ball valve body is used to connect to the water inlet end of the machine head.

[0026] By adopting the above technical solution,

[0027] To sum up, the present application includes at least one of the following beneficial technical effects:

[0028] The rotating mechanism drives the rotating rod to rotate, and the cleaning brush can automatically clean the inner side wall of the filter cylinder as the rotating rod rotates, thus facilitating the cleaning of the impurities on the inner wall of the filter cylinder;

[0029] Through the cooperation of the gear and the convex block, the self-rotation of the cleaning brush is realized, and further, the cleaning frequency of the cleaning brush for the filter cylinder is conveniently adjusted;

[0030] The design of the dirt collecting cover and the sewage discharge pipe facilitates the collection and discharge of the impurities generated during the filtration process, avoids secondary pollution, and at the same time ensures the long-term operation stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the connection between the filtration device and the fixed ball valve according to the embodiment of the present application;

[0032] Figure 2 is a schematic structural diagram of the filtration device according to the embodiment of the present application;

[0033] Figure 3 is Figure 2 a cross-sectional view taken along A-A;

[0034] Figure 4 is Figure 3 an enlarged view taken at A;

[0035] Figure 5 is Figure 2 a cross-sectional view taken along B-B;

[0036] Figure 6 is Figure 5 an enlarged view taken at B;

[0037] Figure 7 is Figure 5 an enlarged view taken at C.

[0038] Description of reference numerals: 1, ball valve body; 2, machine head; 3, filter cartridge; 4, outer cover; 5, rotating rod; 6, connecting rod; 7, limiting frame; 8, plugging groove; 9, cleaning brush; 10, rotating ring; 11, rotating mechanism; 111, lifting assembly; 1111, diaphragm; 1112, second driving block; 1113, spring; 1114, telescopic rod; 112, mounting cover; 113, first driving block; 114, guiding block; 12, guiding groove; 13, pushing block; 14, gear; 15, convex block; 16, screw groove; 17, dirt collection cover; 18, sewage outlet; 19, sewage pipe; 20, joint; 21, sealing ring; 22, plugging block; 23, filter plate. Detailed implementation manners

[0039] The following further elaborates on this application Figures 1-7 in conjunction with the accompanying drawings.

[0040] The embodiment of this application discloses a filtering device and a fixed ball valve.

[0041] Referring to Figure 1 , a fixed ball valve includes a ball valve body 1. The water inlet end of the ball valve body 1 is connected to a water source, thereby facilitating the control of water supply and cut-off of the water source.

[0042] Referring to Figure 1 , Figure 2 , a filtering device includes a machine head 2. The machine head 2 has a water inlet end, a water outlet pipe, and a mounting end. The water inlet end of the machine 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 machine head 2 is for use.

[0043] Referring to Figure 3 , a filter cartridge 3 and an outer cover 4 are installed at the mounting end of the machine head 2, and the filter cartridge 3 is located inside the outer cover 4. In the embodiment of this 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, thereby facilitating the disassembly of the filter cartridge 3 and the outer cover 4 for cleaning. In another embodiment, a snap fastener is preset at the mounting end of the machine head 2, and the filter cartridge 3 and the outer cover 4 are installed at the mounting end of the machine head 2 through the snap fastener. A filter plate 23 is installed at the bottom side of the filter cartridge 3.

[0044] The water inlet end of the machine head 2 is in communication with the inside of the filter cartridge 3, and the water outlet end of the machine head 2 is in communication with the inside of the outer cover 4. Water enters the machine head 2 from the ball valve body 1. The water at the water inlet end of the machine 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 end of the machine head 2 for use.

[0045] Referring to Figure 3 , Figure 4, the filter plate 23 is provided with a rotating rod 5. A part of the cross-section of the rotating rod 5 is circular and is rotatably inserted in the middle of the filter plate 23, and the other part of the cross-section of the rotating rod 5 is rectangular and is located inside the filter cylinder 3. The rotating rod 5 is provided with a connecting rod 6. One end of the connecting rod 6 is fixedly installed with a limiting frame 7, and the limiting frame 7 is slidably sleeved on the part of the rotating rod 5 located inside the filter cylinder 3.

[0046] Refer to Figure 3 , Figure 4 , a cleaning brush 9 is arranged inside the filter cylinder 3. One end of the connecting rod 6 away from the limiting frame 7 is fixedly installed with a rotating ring 10, and the cleaning brush 9 rotatably penetrates through 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 cylinder 3. When the cleaning brush 9 rotates to make the bristles face the inner wall of the filter cylinder 3, the bristles of the cleaning brush 9 are in contact with the inner wall of the filter cylinder 3, so as to facilitate the cleaning brush 9 to clean the inner wall of the filter cylinder 3; when the cleaning brush 9 rotates to make the bristles away from the inner wall of the filter cylinder 3, the cleaning brush 9 is separated from the inner wall of the filter cylinder 3, and the cleaning brush 9 stops cleaning the inner wall of the filter cylinder 3.

[0047] Refer to Figure 3 , Figure 4 , the filter cylinder 3 is installed with a rotating mechanism 11. The rotating mechanism 11 includes a lifting assembly 111, a mounting cover 112, a first driving block 113 and a guiding block 114. The mounting cover 112 is installed on the bottom side of the filter plate 23. Both the top surface of the filter plate 23 and the ground have protrusions for screwing into the mounting cover 112 and the filter cylinder 3, so as to facilitate the disassembly and cleaning of the filter cylinder 3. The first driving block 113 is fixedly installed at the bottom end of the rotating rod 5, and the guiding block 114 is fixedly installed on the periphery of the first driving block 113. A guiding groove 12 for the guiding block 114 to slide is formed on the inner peripheral wall of the mounting cover 112, and the guiding groove 12 is repeatedly bent. Push blocks 13 are fixedly installed on the inner side walls at the bent parts of the guiding groove 12, and the push blocks 13 are arc-shaped.

[0048] The lifting assembly 111 is used to drive the first driving block 113 to lift. When the first driving block 113 lifts, it drives the guiding block 114 and the rotating rod 5 to lift. When the guiding block 114 lifts, it will slide inside the guiding groove 12. The guiding block 114 is guided by the repeated bending of the guiding groove 12, so as to drive the first driving block 113 to rotate. 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 through the limiting 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 limiting frame 7 will slide up and down on the rotating rod 5, so that the cleaning brush 9 will not lift with the rotating rod 5, thereby reducing the blind area existing in the cleaning of the inside of the filter cylinder 3 by the cleaning brush 9.

[0049] When the guiding block 114 slides inside the guiding groove 12, the guiding block 114 will be squeezed against the pushing block 13. The pushing block 13 guides the guiding block 114 to move in one direction inside the guiding groove 12, thereby reducing the situation where the rotating rod 5 rotates back and forth.

[0050] Referring to 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.

[0051] A water source, a fixed ball valve, and a filtering device are connected in sequence for water supply. When using water and when not using water, the water pressure received by the diaphragm 1111 will change. When the water pressure received by 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 driving block 113 and the second driving block 1112 to move away from the filter cartridge 3; when the water pressure received by the diaphragm 1111 is less than the elastic force of the spring 1113, the spring 1113 pushes the diaphragm 1111 and the second driving block 1112 towards the filter cartridge 3 through the second driving block 1112. By the first driving block 113 moving back and forth under the water pressure, it is convenient to drive the first driving block 113 to lift.

[0052] Referring to Figure 3 、 Figure 4 , a gear 14 is fixedly installed at the bottom end of the cleaning brush 9, a convex block 15 is arranged inside the filter cartridge 3, one side of the convex block 15 is conical, and the other side of the convex block 15 is cylindrical. A threaded groove 16 is formed in the inner wall of the filter cartridge 3, and the cylindrical part of the convex block 15 is threadedly inserted into the threaded groove 16. Generally, the wall thickness of the filter cartridge 3 is thin, and it can be thickened separately at the position where the threaded groove 16 needs to be opened. If the wall thickness of the filter cartridge 3 is sufficient, the threaded groove 16 is directly formed on the wall of the filter cartridge 3.

[0053] During the rotation of the cleaning brush 9 around the rotating rod 5, the gear 14 is squeezed against the convex block 15, so that the cleaning brush 9 rotates around its own axis, thereby changing the orientation of the side of the cleaning brush 9 with bristles.

[0054] When the bristles on the cleaning brush 9 face the inner wall of the filter cylinder 3, the cleaning brush 9 rotates around the rotating rod 5 to clean the inner wall of the filter cylinder 3. When the bristles on the cleaning brush 9 face away from the inner wall of the filter cylinder 3, the cleaning brush 9 rotates around the rotating rod 5 and does not clean the inner wall of the filter cylinder 3. It takes a certain amount of time for impurities to accumulate on the inner wall of the filter cylinder 3. Through the cooperation of the convex block 15 and the gear 14, the cleaning frequency of the cleaning brush 9 on the filter cylinder 3 is reduced, thereby increasing the service life of the cleaning brush 9. The convex block 15 is screwed into or out of the screw groove 16, so as to adjust the length of the convex block 15 outside the screw groove 16, and further facilitate the adjustment of the cleaning frequency of the cleaning brush 9 on the inner wall of the filter cylinder 3.

[0055] Refer to Figure 5 , Figure 6 , Figure 7 , a dirt collecting cover 17 is fixedly installed on the bottom side of the filter plate 23, and a sewage discharge port 18 communicating with 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 one end of the sewage discharge pipe 19 away from the dirt collecting cover 17 is fixedly installed through the installation cover 112 and the outer cover 4 and then enters the outside of the outer cover 4. A joint 20 is fixedly installed at one end of the sewage discharge pipe 19 away from the dirt collecting cover 17, and a sealing ring 21 is fixedly installed at one end of the joint 20 away from the sewage discharge pipe 19. A blocking block 22 is fixedly installed on the outer wall of the outer cover 4, and a blocking groove 8 is provided on the blocking block 22. The joint 20 is threadedly inserted into the inside of the blocking groove 8, and the sealing ring 21 abuts tightly against the bottom of the blocking groove 8. The inner bottom wall of the dirt collecting cover 17 is gradually lifted from the side close to the sewage discharge pipe 19 to the other side and is inclined.

[0056] After the cleaning brush 9 cleans the inside of the filter cylinder 3, impurities fall onto 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 to move, so that the impurities enter the inside of the dirt collecting cover 17 from the sewage discharge port 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 inclination of the inner bottom wall of the dirt collecting cover 17, and the impurities are discharged from the sewage discharge pipe 19. After discharging the impurities, the joint 20 is reinserted into the blocking groove 8 for sealing.

[0057] In this application, the diaphragm 1111 will reciprocate, so that the water inside the installation cover 112 flows from the filter plate 23 to the filter cylinder 3, or the water inside the filter cylinder 3 flows from the filter plate 23 to the inside of the installation cover 112. The water flow has the function of flushing and preventing blockage of the holes on the filter plate 23. When the connecting rod 6 scrapes the impurities on the filter plate 23 towards the sewage discharge port 18, the connecting rod 6 does not need to abut against the filter plate 23, and there is a gap between the connecting rod 6 and the filter plate 23, thereby reducing the frictional damage between the connecting rod 6 and the filter plate 23. At the same time, the amount of residual impurities 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.

[0058] The implementation principle of a filtering device and a fixed ball valve in an embodiment of this application is as follows: With the change of water pressure before and after water use, the lifting component 111 drives the first driving block 113 to lift. When the first driving block 113 lifts, through the cooperation of the guiding block 114 and the guiding groove 12, 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 the cleaning of impurities on the inner wall of the filter cylinder 3.

[0059] The above are all the preferred embodiments of this application. Without limiting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this 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; 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).

2. 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.

3. 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.

4. A filtering device according to claim 3, 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).

5. 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).

6. A filtering device according to claim 5, 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).

7. A filtering device according to claim 6, 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.

8. A fixed ball valve, using a filtering device as claimed in any one of claims 1 to 7, 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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