Pneumatic C-shaped scraper ball valve

Abstract

The invention relates to the field of valves, in particular to a pneumatic C-shaped scraper ball valve which is characterized in that a liquid inlet and a liquid outlet are formed in the two opposite ends of a valve body respectively, a valve ball is rotatably mounted in the valve body, and a valve seat matched with the valve ball is fixedly mounted in the liquid inlet; a liquid inlet pipe is fixedly mounted at one end of the liquid inlet, a circular filter plate is coaxially and fixedly mounted in the liquid inlet pipe, a plurality of filter holes are uniformly distributed in the filter plate, a rotating shaft coaxial with the filter plate is rotatably mounted in the liquid inlet pipe, a brush plate for cleaning the filter plate is fixedly mounted on the rotating shaft, and an impeller is fixedly mounted at one end of the rotating shaft; a mounting frame is arranged on the side, away from the brush plate, of the filter plate, dredging needles in one-to-one correspondence with the filter holes are fixedly mounted on the mounting frame, and a linkage mechanism used for driving the mounting frame to reciprocate in the axial direction of the liquid inlet pipe is arranged in the liquid inlet pipe; the rotating shaft rotates to drive the brush plate to clean the filter plate, and meanwhile, the dredging needles are driven to be repeatedly inserted into the corresponding filter holes to dredge the filter holes.

Description

Technical Field

[0001] The present invention relates to the field of valves, in particular to a pneumatic C-type scraper ball valve. Background Art

[0002] Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of media. They not only have a simple structure and good sealing performance, but also have a small volume, light weight, low material consumption, small installation size within a certain nominal diameter range, and small driving torque. They are easy to operate and can be opened and closed quickly. Ball valves are one of the fastest-growing valve varieties in the past decade.

[0003] In the prior art, the utility model application number CN202420646848.0 discloses a new type of filter ball valve, including a valve body and a water inlet and a water outlet respectively located at both ends of the valve body. A ball valve for cutting off the flow of liquid is provided inside the valve body, and a valve seat is provided at the water inlet with a filter device for filtering liquid impurities. A filter cover is provided on the filter device, and a filter net for filtering impurities is provided on the filter cover.

[0004] The ball valve can effectively remove impurities from the fluid and improve fluid cleanliness. However, after prolonged use, a large amount of impurities adhere to the filter, causing the filter to become clogged. Since the ball valve lacks a filter cleaning component, the filter must be regularly disassembled for cleaning, which is inconvenient. Summary of the Invention

[0005] The purpose of the present invention is to provide a pneumatic C-type scraper ball valve to facilitate cleaning of the filter plate, so as to solve the defects mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A pneumatic C-type scraper ball valve comprises a valve body, wherein opposite ends of the valve body are respectively provided with a liquid inlet and a liquid outlet, a valve ball is rotatably mounted in the valve body, and a valve seat matching the valve ball is fixedly mounted in the liquid inlet; a liquid inlet pipe is fixedly mounted at one end of the liquid inlet, a circular filter plate is coaxially fixedly mounted in the liquid inlet pipe, a plurality of filter holes are evenly distributed on the filter plate, a rotating shaft coaxially arranged with the filter plate is rotatably mounted in the liquid inlet pipe, a brush plate for cleaning the filter plate is fixedly mounted on the rotating shaft, and an impeller is fixedly mounted on one end of the rotating shaft; a mounting bracket is provided on the side of the filter plate facing away from the brush plate, and a dredging needle corresponding to the filter holes is fixedly mounted on the mounting bracket, and a linkage mechanism for driving the mounting bracket to move back and forth along the axial direction of the liquid inlet pipe is provided in the liquid inlet pipe.

[0007] As a preferred technical solution, the impeller includes an impeller hub coaxially fixedly mounted on one end of the rotating shaft, and a plurality of blades evenly spaced circumferentially are fixedly mounted on the outer circumferential surface of the impeller hub.

[0008] As a preferred technical solution, an annular plate is fixedly installed on the outer sides of all the blades, the annular plate is coaxially arranged with the rotating shaft, a coaxially arranged driven bevel gear is fixedly installed on the outer side of the annular plate, a drive motor is fixedly installed on the outer side of the liquid inlet pipe, the motor shaft of the drive motor extends into the liquid inlet pipe and is fixedly installed with a half-bevel gear matching the driven bevel gear.

[0009] As a preferred technical solution, a guide column is fixedly installed on the side of the filter plate away from the brush plate, the guide column extends along the length direction of the liquid inlet pipe, the mounting bracket is slidably installed on the guide column, and a block is fixedly installed on the end of the guide column away from the filter plate to prevent the mounting bracket from falling off.

[0010] As a preferred technical solution, the linkage mechanism includes an arc-shaped plate fixedly mounted on the side of the mounting bracket away from the filter plate, the arc-shaped plate is coaxially arranged with the rotating shaft, and the side of the arc-shaped plate away from the mounting bracket is provided with a curved surface spirally arranged around the rotating shaft, one end of the rotating shaft extends to the side of the mounting bracket away from the filter plate and is fixedly mounted with a push rod, the push rod extends radially along the rotating shaft, a spring is connected between the mounting bracket and the filter plate, and when the mounting bracket abuts against the block, the curved surface is located on the rotation path of the push rod.

[0011] As a preferred technical solution, the impeller, the filter plate and the mounting frame are arranged in sequence along the direction of liquid flow in the liquid inlet pipe.

[0012] As a preferred technical solution, a sewage outlet is provided on the bottom wall of the liquid inlet pipe located upstream of the filter plate, and a sealing plate is detachably mounted on the bottom of the sewage outlet.

[0013] As a preferred technical solution, the filter hole is provided with a tapered opening at one end close to the mounting frame.

[0014] As a preferred technical solution, the upper and lower ends of the valve ball are respectively fixedly mounted with a coaxially arranged valve stem and pivot, the valve stem and the pivot are both rotatably mounted on the valve body, and a pneumatic actuator is fixedly mounted on the top of the valve body through a bracket, and the valve stem extends to the outside of the valve body and is connected to the pneumatic actuator.

[0015] As a preferred technical solution, a scraper for cleaning the outer wall of the valve ball is provided on the valve seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This application sets a filter plate in the liquid inlet pipe to filter the liquid flowing through the valve body, thereby improving the cleanliness of the fluid in the valve body and avoiding blockage inside the valve body; 2. The present invention drives the brush plate to clean the filter plate by the rotation of the rotating shaft. At the same time, the rotating shaft drives the push rod to rotate. The contact and separation between the push rod and the curved plate drive the mounting frame to reciprocate along the axial direction of the liquid inlet pipe. The mounting frame drives the dredging needle to repeatedly insert into the corresponding filter hole to dredge the filter hole, thereby effectively avoiding clogging of the filter plate and improving the filtration efficiency of the filter plate. 3. This application drives the rotating shaft to rotate by the impact of liquid in the liquid inlet pipe on the impeller; or drives the semi-bevel gear to rotate by the driving motor, and the semi-bevel gear periodically meshes with the driven bevel gear and drives the driven bevel gear and the rotating shaft to rotate. The driving motor provides power to the rotating shaft, which is more flexible and convenient to use; 4. This application provides a scraper on the valve seat. When the valve ball rotates, the scraper can scrape off impurities attached to the outer wall of the valve ball, thereby improving the sealing performance of the valve ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 1 is a schematic structural diagram of a valve seat according to an embodiment of the present invention; Figure 3 1 is an exploded schematic diagram of a liquid inlet pipe according to an embodiment of the present invention; Figure 4 1 is a schematic structural diagram of an impeller according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of a mounting frame according to an embodiment of the present invention; Figure 6 2 is a schematic cross-sectional view of a mounting bracket according to an embodiment of the present invention.

[0019] In the figure: 1-valve body; 2-liquid inlet; 3-liquid outlet; 4-valve stem; 5-pivot; 6-bracket; 7-pneumatic actuator; 8-valve seat; 9-sealing surface; 10-liquid inlet pipe; 11-filter plate; 12-filter hole; 13-mounting seat; 14-rotating shaft; 15-brush plate; 16-impeller; 17-impeller hub; 18-blade; 19-mounting frame; 20-guide column; 21-stopper; 22-dredging needle; 23-conical mouth; 24-arc plate; 25-curved surface; 26-push rod; 27-spring; 28-annular plate; 29-driven bevel gear; 30-drive motor; 31-semi-bevel gear; 32-drain outlet; 33-sealing plate; 34-scraper; 35-valve ball. DETAILED DESCRIPTION

[0020] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, the pneumatic C-type scraper ball valve includes a valve body 1, with a liquid inlet 2 provided at the right end and a liquid outlet 3 provided at the left end. A valve ball 35 is rotatably mounted within the valve body 1. The valve ball 35 is a C-shaped hemisphere. A coaxially arranged valve stem 4 and pivot 5 are fixedly mounted at the upper and lower ends of the valve ball 35. The valve stem 4 and pivot 5 both extend vertically and are rotatably mounted on the valve body 1. A bracket 6 is fixed to the top of the valve body 1 via bolts. A pneumatic actuator 7 is also fixed to the top of the bracket 6 via bolts. The valve stem 4 extends upward to the outside of the valve body 1 and is connected to the pneumatic actuator 7. The pneumatic actuator 7 drives the valve stem 4 to rotate, thereby adjusting the opening and closing of the ball valve.

[0022] The liquid inlet 2 is internally threaded or fixed with a valve seat 8 that matches the valve ball 35. The valve seat 8 is annular, and one end of the valve seat 8 is provided with a sealing surface 9 that matches the valve ball 35. When the valve ball 35 rotates to the side of the liquid inlet 2, the outer wall of the valve ball 35 fits with the sealing surface 9 on the valve seat 8 to close the valve; or when the valve ball 35 rotates to separate from the valve seat 8, the valve is opened.

[0023] like Figure 1 and Figure 3As shown, a laterally extending liquid inlet pipe 10 is fixedly installed at one end of the liquid inlet 2 away from the valve body 1 by bolts, and a circular filter plate 11 is coaxially fixedly installed in the liquid inlet pipe 10. The inner wall of the liquid inlet pipe 10 is provided with a step surface facing away from the liquid inlet 2, and the filter plate 11 is fixedly installed on the step surface by bolts. A plurality of filter holes 12 are evenly distributed on the filter plate 11. The liquid flowing through the valve body 1 can be filtered by the filter plate 11, thereby improving the cleanliness of the fluid in the valve body 1 and avoiding blockage inside the valve body 1.

[0024] A mounting seat 13 is fixedly installed on the inner wall of the liquid inlet pipe 10 located upstream of the filter plate 11 by bolts, and a rotating shaft 14 coaxially arranged with the filter plate 11 is rotatably installed on the mounting seat 13 through a bearing. A brush plate 15 for cleaning the filter plate 11 is fixedly installed on the rotating shaft 14 by bolts. The brush plate 15 is in the shape of an elongated strip extending along the radial direction of the filter plate 11. One side of the brush plate 15 is provided with bristles that contact the filter plate 11. When the rotating shaft 14 rotates, the brush plate 15 is driven to clean the filter plate 11, thereby avoiding clogging of the filter plate 11 and improving the filtration efficiency of the filter plate 11.

[0025] An impeller 16 is fixedly mounted on one end of the rotating shaft 14 away from the liquid inlet 2. Figure 4 As shown, the impeller 16 includes an impeller hub 17 coaxially fixed to the end of the rotating shaft 14 by bolts, and a plurality of blades 18 uniformly spaced circumferentially are welded on the outer peripheral surface of the impeller hub 17. When the ball valve is opened, the liquid flow in the liquid inlet pipe 10 impacts the blades 18, thereby driving the rotating shaft 14 to rotate, and then the rotating shaft 14 drives the brush plate 15 to clean the filter plate 11.

[0026] like Figure 5 and Figure 6 As shown, a mounting bracket 19 is provided on the side of the filter plate 11 away from the brush plate 15, and a plurality of hollow holes are provided on the mounting bracket 19 for liquid circulation; a guide column 20 is fixedly installed on the side of the filter plate 11 away from the brush plate 15, and the guide column 20 extends along the length direction of the liquid inlet pipe 10. A plurality of guide columns 20 are provided at intervals around the axis of the filter plate 11, and one end of the guide column 20 is provided with an external thread and screwed onto the filter plate 11. The mounting bracket 19 is slidably installed on all the guide columns 20 at the same time, and the guide columns 20 provide guidance and support for the mounting bracket 19. The end of the guide column 20 away from the filter plate 11 is integrally formed with a stopper 21 for preventing the mounting bracket 19 from falling off.

[0027] A dredging needle 22 corresponding to each filter hole 12 is fixedly mounted on the side of the mounting frame 19 near the filter plate 11. The dredging needle 22 faces the corresponding filter hole 12. The diameter of the dredging needle 22 is smaller than that of the filter hole 12. The dredging needle 22 is inserted into the corresponding filter hole 12 to dredge the filter hole 12, thereby further preventing clogging of the filter hole 12. To ensure smooth insertion of the dredging needle 22 into the corresponding filter hole 12, a tapered opening 23 is provided on the end of the filter hole 12 near the mounting frame 19. The tapered opening has a smaller diameter on the end away from the mounting frame 19 and a larger diameter on the end near the mounting frame 19.

[0028] A linkage mechanism is provided in the liquid inlet pipe 10 for driving the mounting frame 19 to reciprocate along the axial direction of the liquid inlet pipe 10. Specifically, the linkage mechanism includes a curved plate 24 welded to the side of the mounting frame 19 facing away from the filter plate 11. There are one or more curved plates 24. When multiple curved plates 24 are provided, the multiple curved plates 24 are evenly spaced around the axis of the rotating shaft 14. The curved plate 24 is coaxially arranged with the rotating shaft 14. The side of the curved plate 24 away from the mounting frame 19 is provided with a curved surface 25 spirally arranged around the rotating shaft 14. The end of the rotating shaft 14 away from the impeller 16 extends to the side of the mounting frame 19 facing away from the filter plate 11. The filter plate 11 and the mounting frame are connected. 19 is provided with a through hole for the rotating shaft to pass through, and a push rod 26 is embedded in the end of the rotating shaft 14 away from the impeller 16. The push rod 26 is located on the side of the mounting frame 19 away from the filter plate 11. The push rod 26 extends along the radial direction of the rotating shaft 14, and the curved surface 25 faces the direction in which the rotating shaft 14 drives the push rod 26 to rotate; a spring 27 is sleeved on the guide column 20 located between the mounting frame 19 and the filter plate 11. When there is no external force, the spring 27 pushes the mounting frame 19 to abut against the stopper 21. At this time, the curved surface 25 is located on the rotation path of the push rod 26.

[0029] When the push rod 26 is rotated to disengage from the curved plate 24, the spring 27 in the compressed state stretches and pushes the mounting frame 19 to move back and forth in the direction away from the filter plate 11, and the mounting frame 19 drives the dredging needle 22 to withdraw from the filter hole 12, thereby driving the mounting frame 19 to reciprocate along the axial direction of the liquid inlet pipe 10 as the rotating shaft 14 rotates, and the mounting frame 19 drives the dredging needle 22 to repeatedly insert into the corresponding filter hole 12 to dredge the filter hole 12.

[0030] like Figure 1 and Figure 3As shown, an annular plate 28 is welded to the outside of all blades 18, and the annular plate 28 is coaxially arranged with the rotating shaft 14. A coaxially arranged driven bevel gear 29 is fixedly installed on the outside of the annular plate 28 by bolts, and a drive motor 30 is fixedly installed on the outside of the liquid inlet pipe 10 by bolts. The motor shaft of the drive motor 30 extends into the liquid inlet pipe 10 along the radial direction of the liquid inlet pipe 10 and is fixedly installed with a half bevel gear 31 matching the driven bevel gear 29. The half bevel gear 31 is a complete bevel gear with one side cut off, so that the half bevel gear 31 periodically meshes with the driven bevel gear 29 when it rotates.

[0031] In the initial state, the half-bevel gear 31 is not engaged with the driven bevel gear 29. When the flow rate of the liquid in the liquid inlet pipe 10 is relatively fast, the liquid in the liquid inlet pipe 10 can impact the impeller 16 and drive the rotating shaft 14 to rotate, thereby achieving the cleaning of the filter plate 11 by the brush plate 15 and the dredging needle 22 to dredge the filter hole 12. Alternatively, when the ball valve opening is small or the flow rate of the liquid in the liquid inlet pipe 10 is relatively slow, the drive motor 30 can be started to drive the half-bevel gear 31 to rotate. The half-bevel gear 31 periodically meshes with the driven bevel gear 29 and drives the driven bevel gear 29 and the rotating shaft 14 to rotate. The drive motor 30 provides power to the rotating shaft 14, thereby improving the cleaning efficiency of the filter plate 11.

[0032] A downward-extending drain port 32 is provided on the bottom wall of the liquid inlet pipe 10, upstream of the filter plate 11. A blocking plate 33 is removably mounted to the bottom of the drain port 32 via bolts. After prolonged use of the filter plate 11, a significant amount of particulate matter and impurities may accumulate within the liquid inlet pipe 10 upstream of the filter plate 11. The blocking plate 33 can be removed to allow the accumulated particulate matter and impurities to be discharged through the drain port 32.

[0033] A scraper 34 for cleaning the outer wall of the valve ball 35 is integrally formed on the valve seat 8 located on the inner circle of the sealing surface 9. When the valve ball 35 rotates, the scraper 34 can scrape off impurities attached to the outer wall of the valve ball 35, thereby improving the sealing performance of the valve ball 35.

[0034] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Pneumatic C-type scraper ball valve, characterized by: The invention comprises a valve body, wherein the opposite ends of the valve body are respectively provided with a liquid inlet and a liquid outlet, a valve ball is rotatably mounted in the valve body, and a valve seat matching the valve ball is fixedly mounted in the liquid inlet; a liquid inlet pipe is fixedly mounted at one end of the liquid inlet, a circular filter plate is coaxially fixedly mounted in the liquid inlet pipe, a plurality of filter holes are evenly distributed on the filter plate, a rotating shaft coaxially arranged with the filter plate is rotatably mounted in the liquid inlet pipe, a brush plate for cleaning the filter plate is fixedly mounted on the rotating shaft, and an impeller is fixedly mounted on one end of the rotating shaft; a mounting bracket is provided on the side of the filter plate facing away from the brush plate, and a dredging needle corresponding to the filter holes is fixedly mounted on the mounting bracket, and a linkage mechanism for driving the mounting bracket to move back and forth along the axial direction of the liquid inlet pipe is provided in the liquid inlet pipe.

2. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: The impeller includes an impeller hub coaxially fixedly mounted on one end of the rotating shaft, and a plurality of blades uniformly spaced circumferentially are fixedly mounted on the outer circumferential surface of the impeller hub.

3. The pneumatic C-type scraper ball valve according to claim 2, characterized in that: An annular plate is fixedly mounted on the outside of all the blades, the annular plate is coaxially arranged with the rotating shaft, a coaxially arranged driven bevel gear is fixedly mounted on the outside of the annular plate, a drive motor is fixedly mounted on the outside of the liquid inlet pipe, the motor shaft of the drive motor extends into the liquid inlet pipe and is fixedly mounted with a half bevel gear matching the driven bevel gear.

4. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: A guide column is fixedly installed on the side of the filter plate away from the brush plate, and the guide column extends along the length direction of the liquid inlet pipe. The mounting bracket is slidably mounted on the guide column, and a block is fixedly installed on the end of the guide column away from the filter plate to prevent the mounting bracket from falling off.

5. The pneumatic C-type scraper ball valve according to claim 4, characterized in that: The linkage mechanism includes an arc-shaped plate fixedly mounted on the side of the mounting bracket away from the filter plate, the arc-shaped plate is coaxially arranged with the rotating shaft, and the side of the arc-shaped plate away from the mounting bracket is provided with a curved surface spirally arranged around the rotating shaft, one end of the rotating shaft extends to the side of the mounting bracket away from the filter plate and is fixedly mounted with a push rod, the push rod extends radially along the rotating shaft, a spring is connected between the mounting bracket and the filter plate, and when the mounting bracket abuts against the block, the curved surface is located on the rotation path of the push rod.

6. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: The impeller, the filter plate and the mounting frame are arranged in sequence along the direction of liquid flow in the liquid inlet pipe.

7. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: A sewage outlet is provided on the bottom wall of the liquid inlet pipe located in the upstream direction of the filter plate, and a sealing plate is detachably installed on the bottom of the sewage outlet.

8. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: The filter hole is provided with a tapered opening at one end close to the mounting frame.

9. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: The upper and lower ends of the valve ball are respectively fixedly mounted with a coaxially arranged valve stem and pivot, the valve stem and the pivot are both rotatably mounted on the valve body, a pneumatic actuator is fixedly mounted on the top of the valve body through a bracket, and the valve stem extends to the outside of the valve body and is connected to the pneumatic actuator.

10. The pneumatic C-type scraper ball valve according to claim 1, characterized in that: The valve seat is provided with a scraper for cleaning the outer wall of the valve ball.

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