Pneumatic control type self-cleaning valve

Abstract

The application discloses a kind of pneumatic control type self-cleaning valve, including valve body, the inside of the valve body is provided with transition chamber, the side of the transition chamber is provided with water inlet, the other side is provided with water outlet;The water outlet is provided with filter screen assembly;Lifting scraper is slidably arranged in the transition chamber, the lifting scraper is provided with closed assembly, and the valve body is provided with pneumatic cleaning assembly between lifting scraper.The water that the valve of the present application is filtered by filter screen assembly when passing, whenever the valve is closed, the lifting scraper driven by cylinder will remove the impurities on filter screen assembly, and push to the bottom of transition chamber, while the pressurized cylinder on the lifting scraper can rely on the extrusion of transition chamber bottom remaining water in the process, so that the water pressure rises, when water pressure rises to a certain value, the bottom of valve body is automatically opened, so as to rely on high water pressure water flow to flush out the impurities together, realize automatic self-cleaning treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a pneumatic control type self-cleaning valve. BACKGROUND

[0002] Valves are used to open and close pipelines, control flow direction, adjust and control parameters of conveying medium, and valve control methods are various, among which pneumatic control is one of them.

[0003] The existing self-cleaning valve with a patent authorization announcement No. CN110118276B includes a valve body, a connecting nut, a connecting seat, a first screw rod, a first fastening nut, a buffer pad, a first connecting block, an elastic filter membrane, an activated carbon plate, a second fastening nut, etc. The valve body is provided with connecting nuts on both sides, and the valve body is provided with a connecting seat on the top. First threaded holes are formed in the top and both sides of the valve body and the connecting seat. When the impurities filtered in the valve body are discharged, the user needs to open the threaded cover plate, and then the impurities in the valve body are treated. After the impurities in the valve body are treated, the threaded cover plate is twisted back. The existing self-cleaning valve can filter impurities in water flow, but when the impurities in the valve body are treated, the valve body bottom needs to be opened manually, and then cleaned, which is low in efficiency. Since it depends on manual treatment, it cannot guarantee that the impurities are cleaned in time. SUMMARY

[0004] In order to overcome the above technical problems, the purpose of the present application is to provide a pneumatic control type self-cleaning valve.

[0005] The purpose of the present application can be realized by the following technical solutions.

[0006] A pneumatic control type self-cleaning valve, comprising a valve body, a transition chamber is arranged in the valve body, a water inlet is arranged on one side of the transition chamber, and a water outlet is arranged on the other side; a filter screen assembly is arranged in the water outlet; a lifting scraper is slidably arranged in the transition chamber, a sealing assembly is arranged on the lifting scraper, a pneumatic cleaning assembly is arranged between the valve body and the lifting scraper, the pneumatic cleaning assembly comprises a pneumatic cylinder, the pneumatic cylinder is arranged on the top of the valve body, a pneumatic telescopic rod is arranged on the pneumatic end of the pneumatic cylinder, a pressurizing cylinder is slidably arranged on the lifting scraper, the pneumatic telescopic rod and the pressurizing cylinder are connected in a matched mode, a third spring is connected between the pressurizing cylinder and the lifting scraper, a funnel guide pipe is arranged on the bottom of the valve body and communicates with the transition chamber, a water pressure sensing switch is connected to the bottom of the pressurizing cylinder, and an electric sealing assembly is electrically connected to the water pressure sensing switch and arranged on the funnel guide pipe.

[0007] As a further scheme of the present application: the electric sealing assembly comprises a supporting box connected below the valve body, an electric telescopic rod connected with the water pressure sensing switch, and a conical sealing top sleeve connected with the funnel duct.

[0008] As a further scheme of the present application: the supporting box is a ring-shaped box, and the electric telescopic rod is connected at the center of the supporting box, and the bottom end of the conical sealing top sleeve has a diameter greater than the inner ring diameter of the supporting box.

[0009] As a further scheme of the present application: the air cylinder is connected with a connecting end cover connected with the valve body by screws, and the top of the pressurizing cylinder is connected with a butt joint sleeve, and the bottom end of the pneumatic telescopic rod is inserted into the butt joint sleeve.

[0010] As a further scheme of the present application: the sealing assembly comprises two connecting frames connected on both sides of the lifting scraper plate, and a strip-shaped sliding groove is arranged on the inner wall of both sides of the transition chamber, the top of the connecting frame is slidably connected with the corresponding strip-shaped sliding groove, a first spring is connected between the top of the connecting frame and the inner top of the transition chamber, and a pressurizing sealing member is arranged on the connecting frame.

[0011] As a further scheme of the present application: the pressurizing sealing member comprises a rubber sealing block connected with the corresponding connecting frame by a second spring, and two supports are connected on the lifting scraper plate in pairs, a rotating rod is rotatably connected to the top of each of the two supports, a linkage steel wire is connected between one end of the rotating rod and the inner top of the transition chamber, and the other end is aligned with the corresponding rubber sealing block.

[0012] As a further scheme of the present application: the end of the rotating rod aligned with the corresponding rubber sealing block is rotatably connected with a pressing column, and the pressing column is in a horizontal position.

[0013] As a further scheme of the present application: a step is formed in the connecting frame, and the rubber sealing block is arranged on the step in a matched manner.

[0014] The present application has the following advantages:

[0015] 1. In the open state of the valve, the water passing through the valve is filtered by the filter screen assembly. When the valve is closed, the lifting scraper plate driven by the air cylinder scrapes and removes the impurities on the filter screen assembly, and pushes them to the bottom of the transition chamber. At the same time, the pressurizing cylinder on the lifting scraper plate can rely on the pneumatic effect to press the remaining water at the bottom of the transition chamber, so that the water pressure is increased. When the water pressure is increased to a certain value, the bottom of the valve body is automatically opened, so that the water flow with high water pressure can flush out the impurities together, realizing automatic self-cleaning treatment.

[0016] 2、The cylinder driving lifting scraper descends, drives the closed assembly to close the water inlet and water outlet, the rotating rod is connected under the action of the connecting steel wire, the rubber sealing block is automatically pressed, the corresponding rubber sealing block is tightly attached to the water inlet and water outlet, and the sealing effect is guaranteed.

[0017] 3、When the cylinder cannot run due to problems, the connecting end cover can be directly disassembled and separated, and the pneumatic telescopic rod matched with the cylinder can also be directly separated from the internal elements of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described below in combination with the drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the application;

[0020] Figure 2 is a schematic diagram of the structure of the valve body in the closed state;

[0021] Figure 3 is an enlarged schematic diagram of position A in the application; Figure 2

[0022] Figure 4 is an enlarged schematic diagram of position B in the application; Figure 3

[0023] Figure 5 is a top view schematic diagram of the support box in the application;

[0024] Figure 6 is a right view schematic diagram of the rotating rod, rubber sealing block and connecting frame in the application.

[0025] In the figure: 1, valve body; 2, water inlet; 3, water outlet; 4, cylinder; 5, support box; 6, electric telescopic rod; 7, conical sealing top sleeve; 8, funnel duct; 9, transition cavity; 10, connecting end cover; 11, strip-shaped sliding groove; 12, first spring; 13, pressure cylinder; 14, lifting scraper; 15, butt joint sleeve; 16, pneumatic telescopic rod; 17, third spring; 18, water pressure sensing switch; 19, connecting steel wire; 20, connecting frame; 21, rubber sealing block; 22, second spring; 23, rotating rod; 24, pressure column; 25, support; 26, step; 27, filter screen assembly. DETAILED DESCRIPTION

[0026] ​​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.

[0027] like Figures 1-6 As shown, a pneumatically controlled self-cleaning valve includes a valve body 1. A transition chamber 9 is located at the center of the inner side of the valve body 1. An inlet 2 is located on one side of the transition chamber 9, and an outlet 3 is located on the other side. A connector is provided at the end of the valve body 1 on the side of the inlet 2, and a connector is also provided at the end of the valve body 1 on the side of the outlet 3, facilitating water flow. A filter assembly 27 is installed inside the outlet 3 to prevent impurities in the water from flowing to the user end through the outlet 3. A lifting scraper 14 is slidably disposed inside the transition chamber 9. The edge of the lifting scraper 14 is completely fitted against the inner wall of the transition chamber 9, effectively blocking the upper and lower space. A sealing assembly is provided on the lifting scraper 14, including two connecting frames 20, which are vertically fixed to both sides of the lifting scraper 14. The connecting frames 20 are fitted against the inner wall of the transition chamber 9, and both sides of the inner wall of the transition chamber 9 are... A vertically oriented strip groove 11 is provided. The top of the connecting frame 20 is slidably connected to the corresponding strip groove 11. A first spring 12 is connected between the top of the connecting frame 20 and the top of the transition cavity 9. A pressure sealing element is provided on the connecting frame 20. The pressure sealing element includes a rubber sealing block 21. A step 26 is provided inside the connecting frame 20. The rubber sealing block 21 is fitted on the step 26. The rubber sealing block 21 is located on the side that fits against the inner wall of the transition cavity 9. It can seal the inlet 2 or outlet 3 at the location. A second spring 22 is connected between the rubber sealing block 21 and the corresponding connecting frame 20. Two brackets 25 are vertically fixedly connected in pairs on the lifting scraper 14. A rotating rod 23 is rotatably connected to the top of each of the two brackets 25. A linkage steel wire 19 is connected between one end of the rotating rod 23 and the top of the transition cavity 9. The other end is aligned with the corresponding rubber sealing block 21. A pressure column 24 is also rotatably connected to this end. The pressure column 24 is in a horizontal position.

[0028] The lifting scraper 14 drives the connecting frame 20 on both sides to descend, and the connecting frame 20 slides relative to the strip-shaped sliding groove 11 during the descending process. When the connecting frame 20 slides to the bottom of the strip-shaped sliding groove 11, it cannot continue to slide due to the limiting, at this time, the rubber sealing block 21 on the connecting frame 20 is just fitted at the position where the water inlet 2 or the water outlet 3 is located. At the same time, during the process that the connecting frame 20 slides to the bottom of the strip-shaped sliding groove 11 along with the lifting scraper 14, the linkage steel wire 19 on both sides is pulled, the straightened linkage steel wire 19 pulls the end of the corresponding rotating rod 23 upward, and the other end of the rotating rod 23 pushes the corresponding rubber sealing block 21 by relying on the pressing column 24. In this way, the rubber sealing blocks 21 at the water inlet 2 and the water outlet 3 are all compressed to ensure the blocking effect.

[0029] The pneumatic cleaning assembly is arranged between the valve body 1 and the lifting scraper 14, and the pneumatic cleaning assembly comprises a gas cylinder 4. The gas cylinder 4 is arranged at the top of the valve body 1. A connecting end cover 10 is fixedly connected to the gas cylinder 4. The connecting end cover 10 is fixedly connected to the valve body 1 by screws, so that the connecting end cover 10 can be conveniently disassembled and assembled. A pneumatic telescopic rod 16 is arranged at the pneumatic end of the gas cylinder 4. The pneumatic telescopic rod 16 penetrates into the transition cavity 9. A pressurizing cylinder 13 is slidably arranged on the lifting scraper 14. A sealing ring is sleeved on the pressurizing cylinder 13 and fixedly connected to the lifting scraper 14. A third spring 17 is arranged between the pressurizing cylinder 13 and the lifting scraper 14. Under the same condition, the deforming force of the third spring 17 is greater than the deforming force of the first spring 12. That is, when the pneumatic telescopic rod 16 pushes the pressurizing cylinder 13, the pressurizing cylinder 13 can drive the lifting scraper 14 to move together. When the connecting frame 20 on the lifting scraper 14 is limited and the lifting scraper 14 cannot continue to descend, the pressurizing cylinder 13 continues to descend relative to the lifting scraper 14 under the pushing of the pneumatic telescopic rod 16. The top of the pressurizing cylinder 13 is fixedly connected to a butt joint sleeve 15. The bottom end of the pneumatic telescopic rod 16 penetrates into the butt joint sleeve 15, so that the pneumatic telescopic rod 16 and the pressurizing cylinder 13 are butted and connected. A funnel duct 8 is arranged at the bottom of the valve body 1 and communicates with the transition cavity 9. A water pressure sensing switch 18 is arranged at the bottom of the pressurizing cylinder 13. An electric sealing assembly is arranged on the funnel duct 8 and electrically connected to the water pressure sensing switch 18.

[0030] The electric sealing assembly includes a support box 5, which is fixedly connected to the bottom of the valve body 1 via a rod. An electric telescopic rod 6, which is electrically connected to a water pressure sensor switch 18, is vertically fixedly connected to the support box 5. When the water pressure sensor switch 18 detects that the water pressure exceeds a certain value, it activates the electric telescopic rod 6 to extend. The telescopic end of the electric telescopic rod 6 is fixedly connected to a conical sealing top sleeve 7 that is connected to the funnel guide tube 8. When the pressure cylinder 13 on the lifting scraper 14 presses down on the water in the transition chamber 9, the water pressure in the transition chamber 9 increases. When the increase exceeds a certain value, the water pressure sensor switch 18 is activated, causing the electric telescopic rod 6 to retract. In this way, the conical sealing top sleeve 7, which is sealed to the funnel guide tube 8, is disengaged, allowing the pressurized water to gush out through the funnel guide tube 8, so as to flush out the impurities in the transition chamber 9 and achieve self-cleaning.

[0031] The support box 5 is an annular box, and the electric telescopic rod 6 is vertically fixed at the center of the support box 5. The bottom diameter of the conical sealing top sleeve 7 is larger than the inner diameter of the support box 5, so that the conical sealing top sleeve 7 can easily guide the debris discharged from the funnel guide tube 8 to slide into the storage space inside the support box 5.

[0032] The working principle of the present invention is as follows: water flows into the transition chamber 9 inside the valve body 1 through the inlet 2, and then is discharged through the outlet 3. During the discharge process, the water passes through the filter screen assembly 27 at the outlet 3 to filter impurities, and the filtered impurities remain in the transition chamber 9.

[0033] Whenever the valve needs to be closed, cylinder 4 is activated. Cylinder 4 then pushes the pressure cylinder 13 via the pneumatic telescopic rod 16. The pressure cylinder 13 then drives the lifting scraper 14 to descend synchronously. During the descent, the lifting scraper 14 scrapes away the debris attached to the filter screen assembly 27. At the same time, the lifting scraper 14 drives the connecting frames 20 on both sides to descend. During the descent, the connecting frames 20 slide relative to the strip groove 11. When the connecting frames 20 slide to the bottom of the strip groove 11, they are limited and cannot slide further. At this point, the connecting frames... The rubber sealing block 21 on the 20 fits perfectly against the inlet 2 or outlet 3. At the same time, as the connecting frame 20 slides towards the bottom of the strip groove 11 with the lifting scraper 14, the linkage steel wires 19 on both sides are pulled. The straightened linkage steel wires 19 pull the end of the corresponding rotating rod 23 upward, so that the other end of the rotating rod 23 pushes the corresponding rubber sealing block 21 by the pressure column 24. In this way, the rubber sealing blocks 21 at the inlet 2 and outlet 3 are pressed tightly to ensure the sealing and blocking effect.

[0034] When the connecting frame 20 on the lifting scraper 14 is limited and the lifting scraper 14 can no longer move downward, the pressure cylinder 13 continues to descend relative to the lifting scraper 14 under the push of the pneumatic telescopic rod 16, thereby pressurizing the remaining water at the bottom of the transition chamber 9. The water pressure in the transition chamber 9 will increase. When the increase exceeds a certain value, the water pressure sensor switch 18 will generate a sense, causing the electric telescopic rod 6 to retract. In this way, the conical sealing top sleeve 7 that is sealed to the funnel guide tube 8 will disengage, making it easier for the pressurized water to gush out downward through the funnel guide tube 8, so as to flush out the impurities in the transition chamber 9 and achieve self-cleaning.

[0035] When cylinder 4 fails to operate and reset, the connecting end cover 10 between cylinder 4 and valve body 1 can be directly removed. Since the pneumatic telescopic rod 16 is connected to the pressure cylinder 13 through the docking sleeve 15, it is easy to separate, thus making it easy to separate directly from the disassembled cylinder 4. This makes it easy for the lifting scraper 14 and the pressure cylinder 13 to reset under the action of the rebound force of the first spring 12 and the third spring 17.

[0036] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A pneumatically controlled self-cleaning valve, comprising a valve body (1), wherein a transition chamber (9) is provided inside the valve body (1), an inlet (2) is provided on one side of the transition chamber (9), and an outlet (3) is provided on the other side; a filter screen assembly (27) is provided inside the outlet (3); a lifting scraper (14) is slidably disposed inside the transition chamber (9), and a sealing assembly is provided on the lifting scraper (14), characterized in that, A pneumatic cleaning assembly is provided between the valve body (1) and the lifting scraper (14). The pneumatic cleaning assembly includes a cylinder (4). The cylinder (4) is located on the top of the valve body (1). The pneumatic end of the cylinder (4) is equipped with a pneumatic telescopic rod (16). A pressure cylinder (13) is slidably arranged on the lifting scraper (14). The pneumatic telescopic rod (16) and the pressure cylinder (13) are connected. A third spring (17) is connected between the pressure cylinder (13) and the lifting scraper (14). A funnel guide tube (8) communicating with the transition cavity (9) is provided at the bottom of the valve body (1). A water pressure sensing switch (18) is connected to the bottom of the pressure cylinder (13). An electric sealing assembly electrically connected to the water pressure sensing switch (18) is provided on the funnel guide tube (8).

2. The pneumatically controlled self-cleaning valve according to claim 1, characterized in that, The electric sealing assembly includes a support box (5) connected below the valve body (1). An electric telescopic rod (6) electrically connected to the water pressure sensing switch (18) is connected to the support box (5). The telescopic end of the electric telescopic rod (6) is connected to a conical sealing top sleeve (7) that docks with the funnel guide tube (8).

3. A pneumatically controlled self-cleaning valve according to claim 2, characterized in that, The support box (5) is an annular box, and the electric telescopic rod (6) is connected to the center of the support box (5). The bottom diameter of the conical sealing top sleeve (7) is larger than the inner diameter of the support box (5).

4. A pneumatically controlled self-cleaning valve according to claim 1, characterized in that, The cylinder (4) is connected to a connecting end cap (10), which is connected to the valve body (1) by screws. The top of the pressure cylinder (13) is connected to a docking sleeve (15), and the bottom end of the pneumatic telescopic rod (16) is inserted into the docking sleeve (15).

5. A pneumatically controlled self-cleaning valve according to claim 1, characterized in that, The sealing assembly includes a connecting frame (20), two connecting frames (20) are provided, and the two connecting frames (20) are respectively connected to the two sides of the lifting scraper (14). The inner walls of both sides of the transition cavity (9) are provided with strip grooves (11). The top of the connecting frame (20) is slidably connected to the corresponding strip groove (11). A first spring (12) is connected between the top of the connecting frame (20) and the top of the transition cavity (9). A pressure sealing element is provided on the connecting frame (20).

6. A pneumatically controlled self-cleaning valve according to claim 5, characterized in that, The pressurized sealing element includes a rubber sealing block (21), and a second spring (22) is connected between the rubber sealing block (21) and the corresponding connecting frame (20). Two brackets (25) are connected in pairs on the lifting scraper (14). A rotating rod (23) is rotatably connected to the top of each of the two brackets (25). A linkage steel wire (19) is connected between one end of the rotating rod (23) and the top of the transition cavity (9), and the other end is aligned with the corresponding rubber sealing block (21).

7. A pneumatically controlled self-cleaning valve according to claim 6, characterized in that, The end of the rotating rod (23) aligned with the corresponding rubber sealing block (21) is rotatably connected to a pressure column (24), which is in a horizontal position.

8. A pneumatically controlled self-cleaning valve according to claim 6, characterized in that, The connecting frame (20) has a step (26) inside, and the rubber sealing block (21) is fitted on the step (26).

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