Valve opening adjusting device applied to pneumatic valve

Abstract

The utility model discloses a valve opening degree adjusting device applied to a pneumatic valve. The valve opening degree adjusting device comprises a support assembly and an adjusting assembly, wherein the support assembly is fixedly connected with the top of the pneumatic valve, and the adjusting assembly is fixedly arranged on the support assembly and can adjust the length of a valve rod extending out of the outer side of the pneumatic valve by limiting the valve rod in the pneumatic valve. The valve opening adjusting device is simple in structure, low in manufacturing cost, convenient to use and high in practicability, the valve opening degree can be adjusted adaptively according to production requirements, the valve opening adjusting device can be suitable for being installed on conveying pipelines with different requirements for the liquid material supply speed, and the application range is wider. In actual use, when the liquid material supply speed needs to be changed, pneumatic valves with different opening degrees do not need to be replaced, only the opening degree of the valve needs to be adjusted, and the production efficiency can be effectively improved. The pneumatic valve opening adjusting device is suitable for being installed on a pneumatic valve to adjust the opening degree of the valve.

Description

Technical Field

[0001] This utility model relates to a valve opening adjustment device, specifically a valve opening adjustment device applied to a pneumatic valve. Background Technology

[0002] Pneumatic valves are a common type of valve for conveying liquid materials. They can control the flow of liquid materials in conveying pipelines and are widely used in industrial production.

[0003] like Figure 1 As shown, a conventional pneumatic valve typically includes a valve body, a pneumatic actuator 6, and a connecting body 5 fixed between the valve body and the pneumatic actuator. The valve body includes a valve housing 1 with a valve body inlet 2 and a valve body outlet 3, a valve stem 4, and a sealing element fixed to the bottom of the valve stem 4 for sealing the valve body outlet 3. The valve stem 4 is slidably connected to the valve housing 1, the connecting body 5, and the pneumatic actuator 6 in sequence and extends to the outer side of the top of the pneumatic actuator 6. When the conventional pneumatic valve is in the closed state, the sealing element at the bottom of the valve stem 4 can block the valve body outlet 3, preventing liquid material from passing through the pneumatic valve and thus stopping material transport. When the conventional pneumatic valve is in the open state, the pneumatic actuator 6 causes the sealing element on the valve stem 4 to move upward to the top of the inner cavity of the valve housing 1, and the length of the valve stem 4 extending beyond the pneumatic actuator 6 reaches its maximum extension length. At this time, the distance between the sealing element and the valve body outlet 3 reaches its maximum, allowing liquid material entering from the valve body inlet 2 to flow out quickly from the valve body outlet 3. However, the opening degree of existing pneumatic valves cannot be adjusted. Once the pneumatic valve is open, the speed at which liquid material passes through it is constant. In actual production, it is impossible to adapt the speed of liquid material passing through the pneumatic valve to production needs, thus limiting its applicability. Furthermore, whenever it is necessary to change the liquid material supply speed in actual production, it is necessary to replace the pneumatic valve with one of different opening degrees, which will seriously affect production efficiency. Summary of the Invention

[0004] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a valve opening adjustment device for pneumatic valves, thereby expanding the application range of pneumatic valves and improving production efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a valve opening adjustment device applied to a pneumatic valve, comprising a bracket assembly for fixed connection to the top of the pneumatic valve and an adjustment component rotatably connected to the bracket assembly, which can adjust the length of the valve stem extending out of the pneumatic valve by limiting the valve stem in the pneumatic valve.

[0006] As a limitation of this utility model, the support assembly includes two vertical members arranged opposite to each other.

[0007] As another limitation of the utility model, the adjusting assembly comprises a rotating shaft arranged on the top of the support assembly, a telescopic member with adjustable length fixed on the rotating shaft, a limiting member fixed on the bottom of the telescopic member, a connecting rod member fixed on one end of the rotating shaft, an installation plate fixed on the vertical member close to the connecting rod member, a fixed shaft member fixed on the installation plate, a driving member movably connected to the fixed shaft member, and a joint bearing fixed on the power output end of the driving member, and the free end of the connecting rod member is assembled on the bearing hole of the joint bearing.

[0008] As a further limitation of the utility model, the telescopic member comprises a mounting seat fixed on the rotating shaft, an adjusting screw threadedly connected to the mounting seat, and an adjusting nut located below the mounting seat and threadedly connected to the adjusting screw.

[0009] As a further limitation of the utility model, the bottom of the limiting member is fixed with a rubber pad.

[0010] Due to the adoption of the above technical scheme, the utility model compared with the prior art has the beneficial effects that:

[0011] (1) The utility model adopts the structure form that the support assembly is combined with the adjusting assembly, wherein the support assembly plays a supporting role on the adjusting assembly, the adjusting assembly can limit the valve rod in the pneumatic valve, can limit the part of the valve rod extending outside the pneumatic valve at the required position, and further realizes the adjustment of the length of the valve rod extending outside the pneumatic valve. When the pneumatic valve is in the open state, the length of the valve rod extending outside the pneumatic valve is adjusted to realize the adjustment of the distance between the sealing member and the valve body discharge port, and further realize the adjustment of the valve opening. In actual production, the utility model can adjust the valve opening adaptively according to the production demand, and further realize the adjustment of the speed of the liquid material passing through the pneumatic valve, which can be applied to the conveying pipeline with different requirements of the liquid material supply speed, and has a wider application range. In actual use, when the liquid material supply speed requirement needs to be changed, different opening pneumatic valves do not need to be replaced, and only the opening of the utility model valve needs to be adjusted, which can effectively improve the production efficiency.

[0012] (2) The utility model discloses simple structure, reasonable structure and convenient to use, when needing to adjust the valve opening, only need to make drive component drive pivot rotation, and pivot can drive telescopic component rotation to make telescopic component rotate to the position at same straight line with valve stem, at this time, adjust telescopic component to the length required, and limiting component can limit the extension length of valve stem. The length of telescopic component can be adjusted to realize the adjustment of the extension length of valve stem outside the pneumatic valve, and then the adjustment of the valve opening can be realized. When needing to open the valve opening to the maximum position, only need to make drive component drive pivot reverse rotation, and pivot can drive telescopic component reverse rotation to make telescopic component and limiting component rotate to the position of not limiting valve stem movement, at this time, the opening of valve can open to the maximum position.

[0013] (3) The utility model discloses simple structure, low in manufacturing cost and convenient to use, only need to rotate adjusting screw rod and adjusting nut to adjust and fix the height of limiting component.

[0014] (4) The bottom of limiting component is equipped with rubber pad, and the rubber pad is relatively soft. When limiting the valve stem, the flexible contact between limiting component and valve stem can avoid the damage of valve stem by limiting component.

[0015] In conclusion, the utility model discloses simple structure, low in manufacturing cost, convenient to use and practical, and the utility model discloses can adjust the valve opening according to production demand adaptability, can be applicable to installing on the conveying pipeline of different liquid material supply speed requirement, and the application range is wider. When needing to change the liquid material supply speed demand in actual use, only need to adjust the opening of the utility model discloses valve, and the production efficiency can be effectively improved. The utility model discloses is suitable for installing on the pneumatic valve and adjusting the opening of valve. DRAWINGS

[0016] The utility model will be described in further detail below in connection with the drawings and specific embodiments.

[0017] Figure 1 It is the structural schematic diagram of prior pneumatic valve;

[0018] Figure 2 It is the perspective view of the utility model embodiment;

[0019] Figure 3 It is Figure 2 The enlarged schematic view of A part in it;

[0020] Figure 4 It is Figure 2 The enlarged schematic view of B part in it;

[0021] Figure 5 This is a schematic diagram illustrating the usage state of an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of another usage state of this utility model embodiment;

[0023] In the diagram: 1. Valve housing; 2. Valve body inlet; 3. Valve body outlet; 4. Valve stem; 5. Connector; 6. Pneumatic actuator; 7. Base plate; 8. Vertical plate; 9. Reinforcing vertical plate; 10. Rotary shaft; 11. Mounting seat; 12. Adjusting screw; 13. Adjusting nut; 14. Limiting component; 15. Set screw; 16. Hex nut; 17. Connecting rod component; 18. Spherical bearing; 19. Cylinder; 20. Connecting plate; 21. Mounting plate; 22. Fixing bolt; 23. Circular limiting sleeve; 24. Fixing nut; 25. Positioning pin. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0025] Example 1: A valve opening adjustment device applied to a pneumatic valve

[0026] like Figure 2 As shown, this embodiment includes a bracket assembly for fixed connection to the top of the pneumatic valve and an adjustment assembly rotatably connected to the bracket assembly, which can adjust the length of the valve stem 4 extending beyond the outside of the pneumatic valve by limiting the valve stem 4 in the pneumatic valve. It should be noted in advance that this embodiment requires the bottom of the bracket assembly to be fixed to the top of the existing pneumatic valve, and then used in conjunction with the existing pneumatic valve.

[0027] The support assembly includes two vertical members arranged opposite each other. Specifically, in this embodiment, the vertical members include a base plate 7 for fixed connection with the top of the pneumatic valve, a vertical plate 8 fixed on the base plate 7, and reinforcing vertical plates 9 fixed opposite to each other on both sides of the vertical plate 8, wherein the reinforcing vertical plate 9 is a triangular plate, and the bottom of the triangular plate is fixed on the top surface of the base plate 7.

[0028] The adjusting assembly comprises a rotating shaft 10 arranged on the top of the support assembly, a length-adjustable telescopic member fixed on the rotating shaft 10, a limiting member 14 fixed on the bottom of the telescopic member, a connecting rod member 17 fixed on one end of the rotating shaft 10, a mounting plate 21 fixed on the vertical member close to the connecting rod member 17, a fixed shaft member fixed on the mounting plate 21, a driving member movably connected to the fixed shaft member, and a joint bearing 18 fixed on the power output end of the driving member, and the free end of the connecting rod member 17 is assembled on the bearing hole of the joint bearing 18. Specifically, in the embodiment, the rotating shaft 10 comprises a first circular rod and a second circular rod fixed on the two ends of the first circular rod respectively, the cross-sectional size of the first circular rod is larger than that of the second circular rod, and the two second circular rods are rotatably arranged on the top of the corresponding vertical plate 8. The telescopic member comprises a mounting seat 11 fixed on the rotating shaft 10, an adjusting screw 12 threadedly connected to the mounting seat 11, and an adjusting nut 13 threadedly connected to the adjusting screw 12 below the mounting seat 11. Specifically, the mounting seat 11 is a cylindrical block, the adjusting screw 12 is threadedly connected in the cylindrical block and extends to the outside of the bottom of the cylindrical block, the adjusting nut 13 is threadedly connected to the position of the adjusting screw 12 outside the bottom of the cylindrical block, the top of the cylindrical block is fixed on the rotating shaft 10 through a top screw 15, and the top of the top screw 15 is fixed with a hex nut 16. The limiting member 14 is a cylindrical plate, the bottom of the limiting member 14 is fixed with a rubber pad, and the size of the limiting member 14 is larger than the cross-sectional size of the valve rod 4 in the pneumatic valve so that the limiting member 14 can block the movement of the valve rod 4. The connecting rod member 17 is a Z-shaped rod, one end of the Z-shaped rod is fixedly connected to the second circular rod in the rotating shaft 10, as shown in Figure 4 , the free end of the Z-shaped rod is assembled on the bearing hole of the joint bearing 18 and extends to the outside of the bearing hole, and a positioning pin 25 is detachably connected to the end of the Z-shaped member away from the vertical member. The fixed shaft member comprises a fixed bolt 22, a limiting sleeve threadedly connected to the threaded rod in the fixed bolt 22, and a fixed nut 24 threadedly connected to the threaded rod in the fixed bolt 22. The driving member comprises a cylinder 19 and a connecting plate 20 fixed on the bottom of the cylinder 19, and a circular through hole is formed in the connecting plate 20. As Figure 3As shown, the fixed shaft member comprises a fixed bolt 22, a threaded rod in the fixed bolt 22 is inserted on the circular through hole and the end of the threaded rod is fixedly connected on the mounting plate 21, a fixed nut 24 is threadedly connected on one side of the threaded rod in the fixed bolt 22 close to the mounting plate 21, a circular annular limiting sleeve 23 is threadedly connected on one side of the threaded rod in the fixed bolt 22 close to the connecting plate 20, the size of the threaded rod in the fixed bolt 22 is smaller than the size of the circular through hole on the connecting plate 20 so that the connecting plate 20 can rotate relative to the fixed bolt 22, and a gap is left between the circular annular limiting sleeve 23 and the connecting plate 20 so as to ensure that the connecting plate 20 can rotate relative to the fixed bolt 22 while limiting the movement of the connecting plate 20 towards the direction close to the mounting plate 21.

[0029] Before using the embodiment, first, the bottom of the two vertical members in the embodiment needs to be fixed on the top of the pneumatic valve correspondingly, and it is necessary to ensure that the telescopic member and the limiting member 14 in the adjusting assembly are located directly above the valve stem 4 in the pneumatic valve when the telescopic member and the limiting member 14 are in the vertical state, wherein the bottom plate 7 in the vertical member can be fixed on the top of the pneumatic valve by welding or by fastening bolts, and in the embodiment, the bottom plate 7 is fixed on the top of the pneumatic valve by fastening bolts. Then, the height of the limiting member 14 when the telescopic member and the limiting member 14 are in the vertical state is adjusted adaptively according to actual production needs, and it is necessary to ensure that the distance between the bottom of the sealing member and the discharge port 3 of the valve body in the pneumatic valve meets the requirement of the flow speed of the liquid material when the liquid material passes through when the valve stem 4 moves upward to contact the bottom surface of the limiting member 14. It needs to be explained here that the method for adjusting the height of the limiting member 14 is as follows: when it is necessary to lower the height of the limiting member 14, the adjusting nut 13 is loosened and the adjusting screw 12 is rotated so that the adjusting screw 12 moves towards the direction close to the top surface of the pneumatic actuator 6 until the limiting member 14 moves to the required height, and then the adjusting nut 13 is tightened. Similarly, when it is necessary to raise the height of the limiting member 14, the adjusting nut 13 is loosened and the adjusting screw 12 is rotated in the opposite direction so that the adjusting screw 12 moves towards the direction away from the top surface of the pneumatic actuator 6 until the limiting member 14 moves to the required height, and then the adjusting nut 13 is tightened. Finally, the pneumatic valve can be started for corresponding production work.

[0030] The working principle of the embodiment is as follows: Figure 5 As shown, the power output end in the driving member moves downward, the power output end in the driving member is in the contracted state, at this time, the telescopic member and the limiting member 14 are in the inclined state, the limiting member 14 does not limit the upward movement of the valve stem 4, the valve stem 4 can drive the sealing plug to move to the top of the cavity in the valve body, the distance between the bottom of the sealing member and the liquid discharge port reaches the maximum, and at this time, the valve is opened to the maximum opening degree. Figure 6As shown, the power output end in the driving member moves upward, the power output end in the driving member is in the extended state, the power output end in the driving member drives the joint bearing 18 to move upward, the joint bearing 18 drives the connecting rod member 17 to rotate clockwise, the connecting rod member 17 drives the rotating shaft 10 to rotate clockwise, the rotating shaft 10 drives the telescopic member and the limiting member 14 to rotate to the vertical state and be located directly above the valve rod 4 in the pneumatic valve, at this time, the limiting member 14 can limit the upward movement of the valve rod 4, when the top of the valve rod 4 contacts the bottom of the limiting member 14, the valve rod 4 cannot continue to move upward, at this time, the distance between the bottom of the sealing element and the discharge port 3 of the valve body meets the demand of the liquid material flow speed, thereby the embodiment plays a role of controlling the liquid material flow speed.

[0031] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A valve opening adjustment device for application to a pneumatic valve, characterized by: The application relates to a support assembly for fixedly connecting with the top of a pneumatic valve and an adjusting assembly rotatably connected on the support assembly, which can adjust the length of a valve rod extending outside the pneumatic valve by limiting the valve rod in the pneumatic valve.

2. A valve gate positioner for use with a pneumatic valve as defined in claim 1, wherein: The support assembly comprises two vertically arranged vertical members.

3. A valve stroke adjustment device for a pneumatic valve according to claim 1 or 2, characterized in that: The adjusting assembly comprises a rotating shaft rotatably arranged on the top of the support assembly, a length-adjustable telescopic member fixedly arranged on the rotating shaft, a limiting member fixedly arranged on the bottom of the telescopic member, a connecting rod member fixedly arranged on one end of the rotating shaft, a mounting plate fixedly arranged on the vertical member close to the connecting rod member, a fixed shaft member fixedly arranged on the mounting plate, a driving member movably connected on the fixed shaft member, and a joint bearing fixedly arranged on the power output end of the driving member, and the free end of the connecting rod member is assembled on the bearing hole of the joint bearing.

4. A valve stroke adjustment device for use on a pneumatic valve as defined in claim 3, wherein: The telescopic member comprises a mounting seat fixedly arranged on the rotating shaft, an adjusting screw threadedly connected on the mounting seat, and an adjusting nut threadedly connected on the adjusting screw and located below the mounting seat.

5. A valve stroke adjustment device for use on a pneumatic valve as defined in claim 4, wherein: The bottom of the limiting member is fixedly arranged with a rubber pad.

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