Pneumatic control valve

Abstract

This utility model relates to a pneumatic regulating valve, comprising a valve body located below the valve body; a valve cage mounted on the valve body; a valve plug mounted on the valve cage; a valve cover fixedly connected above the valve body; a valve stem mounted on the pneumatic regulating valve; a valve stem fixedly connected to the bottom of the valve cage; the valve stem passing through the valve cover and a bracket, with its upper end connected to a pneumatic diaphragm actuator; a valve stem sealing structure mounted on the valve stem; and a pneumatic diaphragm actuator connected above the valve stem and valve cover, driving the valve stem to move the valve plug up and down within the valve cage to adjust the valve opening and medium flow rate. This improves the adjustment accuracy and response speed, solving the technical problems in the prior art where operators need to manually adjust the valve opening to control fluid parameters, which is not only inefficient but also difficult to achieve precise control. Especially in complex working conditions or hazardous environments, manual operation poses significant safety risks, and under high pressure differential conditions, the valve also suffers from vibration and stability issues.

Description

Technical Field

[0001] The embodiments of this utility model relate to a valve, and more particularly to a pneumatic regulating valve. Background Technology

[0002] In the field of industrial process control, precisely adjusting parameters such as the flow rate, pressure, and temperature of fluid media is key to ensuring stable and efficient operation of the production process.

[0003] In existing technologies, operators need to manually adjust the valve opening to control fluid parameters, which is not only inefficient but also difficult to achieve precise control. Especially in some complex working conditions or dangerous environments, manual operation poses significant safety risks, and valves also have vibration and stability issues under high pressure differential conditions. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic regulating valve that can precisely adjust the valve opening and the flow rate of the medium.

[0005] To achieve the above objectives, an embodiment of this utility model designs a pneumatic regulating valve, comprising:

[0006] The valve body is disposed below the pneumatic regulating valve;

[0007] Valve cage, wherein the valve cage is mounted on the valve body;

[0008] A valve plug is provided on the valve cage;

[0009] A valve cover is fixedly connected to the valve body above the valve body.

[0010] A valve stem is provided on the pneumatic regulating valve; the bottom of the valve stem is fixedly connected to the valve cage; the valve stem passes through the valve cover and the bracket, and its upper end is connected to the pneumatic diaphragm actuator.

[0011] A valve stem sealing structure is provided on the valve stem;

[0012] A pneumatic diaphragm actuator is connected above the valve stem and the valve cover. The pneumatic diaphragm actuator drives the valve stem to move, and the valve stem drives the valve plug to move up and down in the valve cage to adjust the valve opening and the medium flow rate.

[0013] Furthermore, in the pneumatic regulating valve of this utility model, the pneumatic diaphragm actuator includes:

[0014] A support structure is fixedly connected to the valve cover;

[0015] A pneumatic device is fixedly connected above the support structure.

[0016] Furthermore, in the pneumatic regulating valve of this utility model, the support structure includes:

[0017] A bracket is fixedly connected to the valve cover;

[0018] A pointer, which is mounted on the valve stem;

[0019] A ruler is fixedly connected inside the bracket.

[0020] Furthermore, in the pneumatic regulating valve of this utility model, the pneumatic device includes:

[0021] The lower shell is fixedly connected above the bracket;

[0022] An upper shell is fixedly connected above the lower shell;

[0023] A thin film is disposed between the upper shell and the lower shell, and both ends of the thin film are fixedly connected to the upper shell and the lower shell;

[0024] A film support plate is disposed above the film;

[0025] Spring guide post, the spring guide post is provided on the film support plate;

[0026] A spring, wherein the spring is arranged around the spring guide post;

[0027] The inlet is located below the lower shell;

[0028] An exhaust port is provided above the upper shell.

[0029] Furthermore, in the pneumatic regulating valve of this utility model, the valve stem sealing structure includes:

[0030] Lower packing material is provided between the valve stem and the valve cover;

[0031] Intermediate packing is provided above the lower packing;

[0032] Upper packing: Upper packing is provided above the middle packing;

[0033] A pressure sleeve is provided above the upper packing;

[0034] A pressure plate is provided above the pressure sleeve; the pressure plate is fixedly connected to the valve cover by a double-ended screw and a nut.

[0035] Furthermore, in the pneumatic regulating valve of this utility model, a channel is provided in the valve body.

[0036] Furthermore, in the pneumatic regulating valve of this utility model, the valve body and the valve cover are fixedly connected by a double-ended screw and a nut; the pressure plate and the valve cover are fixedly connected by a double-ended screw and a nut.

[0037] Furthermore, in the pneumatic regulating valve of this utility model, a first gasket is provided between the valve cage and the valve body; and a second gasket is provided between the valve cage and the valve body.

[0038] Furthermore, in the pneumatic regulating valve of this utility model, reinforcing ribs are provided on the valve body.

[0039] Furthermore, in the pneumatic regulating valve of this utility model, both the first gasket and the second gasket are made of graphite.

[0040] Compared with the prior art, the embodiment of this utility model adopts the following method: a valve body is set below the pneumatic regulating valve; a valve cage is set on the valve body; a valve plug is set on the valve cage; a valve cover is fixedly connected above the valve body; a valve stem is set on the pneumatic regulating valve; the bottom of the valve stem is fixedly connected to the valve cage; the valve stem passes through the valve cover and the bracket, and its upper end is connected to a pneumatic diaphragm actuator; a valve stem sealing structure is set on the valve stem; and a pneumatic diaphragm actuator is connected above the valve stem and the valve cover. The pneumatic diaphragm actuator drives the valve stem to run, and the valve stem drives the valve plug to move up and down in the valve cage, thereby adjusting the valve opening and the medium flow rate. This improves the adjustment accuracy and response speed, and solves the technical problems in the prior art where operators need to manually adjust the valve opening to control fluid parameters, which is not only inefficient but also difficult to achieve precise control. Especially in some complex working conditions or dangerous environments, manual operation poses a significant safety risk, and the valve also has vibration and stability problems under high pressure differential conditions. Attached Figure Description

[0041] Figure 1 This is the front view of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0043] The embodiments of this utility model relate to a pneumatic regulating valve, such as... Figure 1 As shown, it includes:

[0044] In this embodiment, a valve body 1 is provided below the pneumatic regulating valve. The valve body 1 is the main body of the valve, which bears the pressure of the fluid and provides space for the installation of internal components such as the valve cage 3 and the valve plug 4.

[0045] A valve cage 3 is installed on the valve body 1. The valve cage 3 can guide the fluid and allow the fluid to pass through the valve stably. The valve cage 3 provides precise guidance for the up and down movement of the valve plug 4. Under some high pressure differential conditions, the valve cage 3 can also balance the pressure before and after the valve, reduce the force of the pressure difference on the valve plug 4, thereby reducing the vibration and noise of the valve.

[0046] A valve plug 4 is installed on the valve cage 3. The valve plug 4 can regulate the flow rate. Specifically, the pneumatic diaphragm actuator 19 drives the valve stem 9 to operate. The valve stem 9 drives the valve plug 4 to move up and down inside the valve cage 3. The flow rate of the fluid is controlled by changing the flow area between the valve plug 4 and the valve body 1.

[0047] A valve cover 6 is fixedly connected above the valve body 1. The valve cover 6 can support and fix internal components such as the valve stem 9 and the valve plug 4. The valve stem 9 passes through the valve cover 6 and the bracket 21, and its upper end is connected to the pneumatic diaphragm actuator 19. The valve cover 6 ensures the stability of the valve stem 9 during the movement process and prevents the valve stem 9 from shaking or deviating.

[0048] A valve stem 9 is installed on the pneumatic regulating valve; the bottom of the valve stem 9 is fixedly connected to the valve cage 3; the valve stem 9 passes through the valve cover 6 and the bracket 21, and its upper end is connected to the pneumatic diaphragm actuator 19, so that the valve stem 9 can operate stably and prevent the valve stem 9 from shaking or deviating.

[0049] A valve stem sealing structure 18 is provided on the valve stem 9. The valve stem sealing structure 18 seals the space between the valve stem 9 and the valve cover 6 to prevent media leakage.

[0050] A pneumatic diaphragm actuator 19 is connected above the valve stem 9 and the valve cover 6. The pneumatic diaphragm actuator 19 drives the valve stem 9 to operate, and the valve stem 9 drives the valve plug 4 to move up and down in the valve cage 3 to adjust the valve opening and the medium flow.

[0051] In this embodiment, a pneumatic diaphragm actuator 19 is connected above the valve stem 9 and the valve cover 6. The pneumatic diaphragm actuator 19 drives the valve stem 9 to operate, and the valve stem 9 drives the valve plug 4 to move up and down in the valve cage 3, adjusting the valve opening and the medium flow rate. This improves the adjustment accuracy and response speed, and solves the technical problems in the prior art where operators need to manually adjust the valve opening to control fluid parameters. This is not only inefficient, but also difficult to achieve precise control. Especially in some complex working conditions or dangerous environments, manual operation poses a significant safety risk, and the valve also has vibration and stability problems under high pressure differential conditions.

[0052] To achieve the above-mentioned technical effects, such as Figure 1As shown, the pneumatic diaphragm actuator 19 includes:

[0053] A support structure 20 is fixedly connected to the valve cover 6, and the support structure 20 supports the pneumatic device 32.

[0054] A pneumatic device 32 is fixedly connected above the support structure 20. The pneumatic device 32 provides a power source, converts the pressure energy of air into mechanical energy, drives the valve stem 9 to operate, and the valve stem 9 drives the valve plug 4 to move up and down in the valve cage 3. The flow rate of the fluid is controlled by changing the flow area between the valve plug 4 and the valve body 1.

[0055] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the support structure 20 includes:

[0056] A bracket 21 is fixedly connected to the valve cover 6. The bracket 21 serves as a support. The valve cover 6 is fixedly connected below the bracket 21 and the pneumatic device 32 is fixedly connected above the bracket 21.

[0057] A pointer 28 is installed on the valve stem 9 to visually display the valve opening. The pointer 28 moves synchronously with the up and down movement of the valve stem 9. The operator can directly see the position of the pointer 28 on the scale 29, reflecting the valve opening status.

[0058] A scale 29 is fixedly connected inside the bracket 21. The scale 29 is marked with precise graduations. The operator can obtain the valve opening percentage according to the graduation value pointed to by the pointer 28. The scale 29 also makes the valve calibration and adjustment more convenient.

[0059] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the pneumatic device 32 includes:

[0060] The lower shell 22 is fixedly connected above the bracket 21. The lower shell 22 and the upper shell 23 form a relatively closed internal space for accommodating and protecting the internal components.

[0061] The upper shell 23 is fixedly connected above the lower shell 22. The lower shell 22 and the upper shell 23 form a relatively closed internal space to accommodate and protect the internal components, prevent compressed air leakage, and ensure the stability of the internal pressure of the pneumatic diaphragm actuator 19.

[0062] A diaphragm 24 is provided between the upper shell 23 and the lower shell 22. The two ends of the diaphragm 24 are fixedly connected to the upper shell 23 and the lower shell 22. The diaphragm 24 can sense the pressure change of the internal compressed air and convert the pressure into mechanical displacement. The fixed connection between the two ends of the diaphragm 24 and the upper shell 23 and the lower shell 22 plays a sealing role, preventing compressed air leakage and ensuring the stability and accuracy of the internal pressure.

[0063] A film support plate 25 is provided above the film 24. The film support plate 25 can evenly transmit the force generated when the film 24 deforms to the spring support column 26 and the spring 27, so as to prevent the film 24 from wearing during the deformation process and extend the service life of the film 24.

[0064] A spring guide post 26 is provided on the film support plate 25. The spring guide post 26 can fix the position of the spring 27 and guide the spring 27 to extend and retract, ensuring that the spring 27 maintains linear motion during the movement and preventing the spring 27 from bending or deviating.

[0065] A spring 27 is provided around the spring guide post 26. The extension and retraction of the spring 27 causes the valve stem 9 and the valve plug 4 to move up and down.

[0066] An inlet 30 is provided below the lower shell 22. Compressed air is introduced through the inlet 30, allowing the compressed air to enter the closed space formed by the lower shell 22 and the upper shell 23, and act on the diaphragm 24 to provide power for the pneumatic diaphragm actuator 19.

[0067] An exhaust port 31 is provided above the upper shell 23. When it is necessary to reduce the valve opening or close the valve, the compressed air inside the upper shell 23 needs to be discharged. The exhaust port 31 is used to discharge exhaust gas, reduce internal pressure, and allow the diaphragm 24 to reset under the action of the spring 27.

[0068] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the valve stem sealing structure 18 includes:

[0069] A lower packing 10 is provided between the valve stem 9 and the valve cover 6. The lower packing 10 can prevent media leakage.

[0070] An intermediate packing 11 is provided above the lower packing 10, and the intermediate packing 11 can prevent media leakage;

[0071] An upper packing 12 is installed above the middle packing 11. The upper packing 12 can prevent medium leakage. Under high pressure conditions, the multi-layer packing can withstand pressure and enhance the sealing effect.

[0072] A pressure sleeve 13 is provided above the upper packing 12. The pressure sleeve 13 evenly transmits the pressure applied by the pressure plate 14 to the upper packing 12, so that the lower packing 10, the middle packing 11, the upper packing 12 are in close contact with the valve stem 9 and the valve cover 6, thereby improving the sealing effect.

[0073] A pressure plate 14 is installed above the pressure sleeve 13. The pressure plate 14 fixes the lower packing 10, middle packing 11, upper packing 12 and pressure sleeve 13 of the packing group to prevent the lower packing 10, middle packing 11 and upper packing 12 from loosening.

[0074] To achieve the above-mentioned technical effects, such as Figure 1As shown, a channel 17 is provided inside the valve body 1, and the channel 17 is used for the flow of the medium.

[0075] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the valve body 1 and the valve cover 6 are fixedly connected by double-ended screws 7 and nuts 8, ensuring the stability of the overall valve structure; the pressure plate 14 and the valve cover 6 are fixedly connected by double-ended screws 15 and nuts 16. The pressure plate 14 tightly presses the lower packing 10, the middle packing 11, the upper packing 12 and the pressure sleeve 13 between the valve stem 9 and the valve cover 6 to prevent the lower packing 10, the middle packing 11 and the upper packing 12 from loosening.

[0076] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a first gasket 2 is provided between the valve cage 3 and the valve body 1; a second gasket 5 is provided between the valve cage 3 and the valve body 1. Both the first gasket 2 and the second gasket 5 are used to seal between the valve cage 3 and the valve body 1 to prevent media leakage.

[0077] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a reinforcing rib 32 is provided on the valve body 1. The reinforcing rib 32 can enhance the structural strength of the valve body 1 and improve the stability of the valve.

[0078] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the first gasket 2 and the second gasket 5 are both made of graphite.

[0079] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A pneumatic regulating valve, characterized in that, include: The valve body is disposed below the pneumatic regulating valve; Valve cage, wherein the valve cage is mounted on the valve body; A valve plug is provided on the valve cage; A valve cover is fixedly connected to the valve body above the valve body. A valve stem is provided on the pneumatic regulating valve; the valve stem passes through the valve cover and the bracket and is connected to a pneumatic diaphragm actuator; A valve stem sealing structure is provided on the valve stem; A pneumatic diaphragm actuator is connected above the valve stem and the valve cover. The pneumatic diaphragm actuator drives the valve stem to move, and the valve stem drives the valve plug to move up and down in the valve cage to adjust the valve opening and the medium flow rate.

2. The pneumatic regulating valve according to claim 1, characterized in that, The pneumatic diaphragm actuator includes: A support structure is fixedly connected to the valve cover; A pneumatic device is fixedly connected above the support structure.

3. The pneumatic regulating valve according to claim 2, characterized in that, The support structure includes: A bracket is fixedly connected to the valve cover; A pointer, which is mounted on the valve stem; A ruler is fixedly connected inside the bracket.

4. The pneumatic regulating valve according to claim 2, characterized in that, The pneumatic device includes: The lower shell is fixedly connected above the bracket; An upper shell is fixedly connected above the lower shell; A thin film is disposed between the upper shell and the lower shell, and both ends of the thin film are fixedly connected to the upper shell and the lower shell; A film support plate is disposed above the film; Spring guide post, the spring guide post is provided on the film support plate; A spring, wherein the spring is arranged around the spring guide post; The inlet is located below the lower shell; An exhaust port is provided above the upper shell.

5. The pneumatic regulating valve according to claim 1, characterized in that, The valve stem sealing structure includes: Lower packing material is provided between the valve stem and the valve cover; Intermediate packing is provided above the lower packing; Upper packing: Upper packing is provided above the middle packing; A pressure sleeve is provided above the upper packing; A pressure plate is provided above the pressure sleeve; the pressure plate is fixedly connected to the valve cover by a double-ended screw and a nut.

6. The pneumatic regulating valve according to claim 1, characterized in that, A channel is provided inside the valve body.

7. The pneumatic regulating valve according to claim 5, characterized in that, The valve body and the valve cover are fixedly connected by a double-ended screw and a nut; the pressure plate and the valve cover are fixedly connected by a double-ended screw and a nut.

8. The pneumatic regulating valve according to claim 1, characterized in that, A first gasket is provided between the valve cage and the valve body; a second gasket is provided between the valve cage and the valve body.

9. The pneumatic regulating valve according to claim 1, characterized in that, Reinforcing ribs are provided on the valve body.

10. The pneumatic regulating valve according to claim 8, characterized in that, Both the first gasket and the second gasket are made of graphite.

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