High-temperature valve body executing mechanism and self-operated regulating valve

Abstract

The utility model relates to the technical field of regulating valves, in particular to a high-temperature valve body executing mechanism and a self-operated regulating valve. Wherein the high-temperature valve body executing mechanism comprises an upper diaphragm cover, a lower diaphragm cover, a guide rod and a metal corrugated diaphragm; the upper membrane cover and the lower membrane cover are connected in a sealed mode and form an adjusting cavity, the upper membrane cover and the lower membrane cover are provided with a first connecting port and a second connecting port respectively, the guide rod penetrates through the lower membrane cover in a sliding mode, the metal corrugated membrane is arranged on the guide rod, and the edge of the metal corrugated membrane is fixedly connected to the sealed connecting position of the upper membrane cover and the lower membrane cover. The metal corrugated diaphragm divides the adjusting cavity into an upper adjusting cavity and a lower adjusting cavity. The high-temperature valve body executing mechanism can work under a high-temperature medium.

Description

Technical Field

[0001] This utility model relates to the technical field of regulating valves, specifically to a high-temperature valve body actuator and a self-operated regulating valve. Background Technology

[0002] A self-operated control valve is a type of control valve that uses the pressure of the medium itself as the regulating force; the medium can be gas or liquid.

[0003] When a self-operated regulating valve is working, the medium enters the valve body through the inlet, and a flow process is formed under the control of the valve disc and valve seat. At the outlet, a pressure corresponding to the inlet is formed and acts on the diaphragm. When the pressure of the conveyed medium changes, the outlet pressure also changes accordingly. This, in turn, affects the adjusting spring on the piston through the movement of the diaphragm, causing the valve disc to change its opening degree, thereby achieving the purpose of regulating the medium flow rate.

[0004] In related technologies, diaphragms are often made of rubber. However, in some self-operated control valves, the medium temperature exceeds 150°C or even higher. The rubber diaphragm cannot withstand the high temperature brought by the medium, which leads to the failure of the actuator and the failure of the self-operated control valve. Therefore, we need to design a high-temperature valve body actuator and a self-operated control valve that can work under high-temperature medium. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high-temperature valve body actuator and a self-operated regulating valve, which can work under high-temperature media.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] In a first aspect, this utility model provides a high-temperature valve body actuator, comprising: an upper diaphragm cover, a lower diaphragm cover, a guide rod, and a metal corrugated diaphragm; the upper diaphragm cover and the lower diaphragm cover are sealed together and form an adjustment cavity, the upper and lower diaphragm covers are respectively provided with a first connection port and a second connection port, the guide rod slides through the lower diaphragm cover, the metal corrugated diaphragm is disposed on the guide rod, the edge of the metal corrugated diaphragm is fixedly connected to the sealed connection between the upper and lower diaphragm covers, and the metal corrugated diaphragm divides the adjustment cavity into an upper adjustment cavity and a lower adjustment cavity.

[0008] By adopting the above technical solution, when the high-temperature valve body actuator is working, the first connection port is connected to the downstream pipeline, the second connection port is connected to the upstream pipeline, and the guide rod is connected to the piston on the valve body. When the medium flows through the upstream pipeline, it can enter the lower regulating chamber through the second connection port; when the medium flows through the valve body through the downstream pipeline, it can enter the upper regulating chamber through the first connection port. The medium in both the upper and lower regulating chambers will generate pressure acting on the metal bellows diaphragm. When the pressure of the delivered medium increases, the pressure in the lower regulating chamber increases, the metal bellows diaphragm moves upward, causing the guide rod to move upward, which in turn causes the piston to move upward, increasing the valve body opening. Then, the pressure in the upper regulating chamber increases synchronously, the metal bellows diaphragm moves downward, causing the guide rod to move downward, which in turn causes the valve body opening to decrease, until the medium pressure reaches the set equilibrium. When the pressure of the conveyed medium decreases, the pressure in the lower regulating chamber decreases, causing the metal bellows diaphragm to move downwards, which in turn moves the guide rod downwards. This downward movement of the guide rod then moves the piston downwards, causing the valve opening to decrease. Simultaneously, the pressure in the upper regulating chamber decreases, causing the metal bellows diaphragm to move upwards, which in turn moves the guide rod upwards, causing the valve opening to increase, until the medium pressure reaches the set equilibrium. During this process, because the metal bellows diaphragm can withstand the high temperatures brought by the medium, the actuator can operate under high-temperature media conditions.

[0009] Optionally, the thickness of the corrugated metal diaphragm is 0.1mm-0.6mm.

[0010] By adopting the above technical solution, when the thickness of the metal corrugated diaphragm is 0.1mm-0.6mm, it is more suitable for the medium to be self-regulating.

[0011] Optionally, the corrugated metal diaphragm is made of austenitic stainless steel.

[0012] By adopting the above technical solutions, austenitic stainless steel has good plasticity.

[0013] Optionally, the upper membrane cover has at least one sealing ring groove, the lower membrane cover has at least one sealing ring protrusion, and the edge of the corrugated metal diaphragm is pressed between the sealing ring groove and the sealing ring protrusion.

[0014] By adopting the above technical solution, the edges of the metal corrugated diaphragm can be squeezed and fixed by setting the sealing ring groove and sealing ring protrusion, thereby improving the sealing effect between the metal corrugated diaphragm and the upper and lower membrane covers.

[0015] Optionally, the high-temperature valve body actuator further includes: multiple bolts and multiple first nuts, wherein the bolts are sequentially threaded through an upper diaphragm cover, a metal corrugated diaphragm, and a lower diaphragm cover, and the first nuts are threaded onto the bolts.

[0016] By adopting the above technical solution, multiple bolts and multiple first nuts can be used to fix the upper membrane cover, the metal corrugated diaphragm and the lower membrane cover.

[0017] Optionally, the high-temperature valve body actuator further includes: a guide sleeve, which is fixed to the lower diaphragm cover, and the guide rod is slidably inserted into the guide sleeve.

[0018] By adopting the above technical solution, the guide sleeve can guide the guide rod, thereby improving the stability and accuracy of the guide rod sliding and inserting.

[0019] Optionally, the guide sleeve is provided with a limiting protrusion at one end near the metal corrugated diaphragm. The diameter of the limiting protrusion is larger than the diameter of the guide sleeve, and the limiting protrusion is sealed and welded to the lower diaphragm cover.

[0020] By adopting the above technical solution, the limiting protrusion can limit and fix the guide sleeve, preventing it from falling off during the reciprocating movement of the guide rod. By sealing the limiting protrusion with the lower membrane cover through welding, the sealing of the lower regulating cavity can be effectively ensured.

[0021] Optionally, the high-temperature valve body actuator further includes a limiting member, wherein the metal corrugated diaphragm is mounted on the guide rod via the limiting member.

[0022] By adopting the above technical solution, the limiting component can limit and fix the metal corrugated diaphragm, thereby improving the stability of the metal corrugated diaphragm during operation.

[0023] Optionally, the limiting component includes a tray, a top plate, and a second nut; the second nut is coaxially threaded onto the guide rod, and the top plate and the tray are clamped to both sides of the metal corrugated diaphragm by the second nut.

[0024] By adopting the above technical solution, the second nut can limit and fix the metal corrugated diaphragm, and the tray and top plate can provide upper and lower limit support for the metal corrugated diaphragm.

[0025] Secondly, this utility model provides a self-operated regulating valve, comprising: a valve body and a high-temperature valve body actuator as described in the first aspect, wherein the piston of the valve body is coaxially and fixedly connected to the guide rod.

[0026] By adopting the above technical solution, the self-regulating valve can perform self-regulation through the pressure difference of the medium, and the self-regulating valve uses a metal bellows diaphragm to work in high-temperature medium environments.

[0027] In summary, this utility model has at least the following beneficial technical effects:

[0028] By using a metal corrugated diaphragm and designing a corresponding high-temperature valve body actuator and a self-operated regulating valve, the high-temperature valve body actuator and the self-operated regulating valve can operate under high-temperature media. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the high-temperature valve body actuator in this embodiment of the present invention.

[0030] Figure 2 for Figure 1 Enlarged view of section A.

[0031] Explanation of reference numerals in the attached drawings: 1. Upper membrane cover; 2. Lower membrane cover; 3. Guide rod; 4. Corrugated metal diaphragm; 5. First connection port; 6. Second connection port; 7. Adjusting upper cavity; 8. Adjusting lower cavity; 9. Bolt; 10. First nut; 11. Sealing ring groove; 12. Sealing ring protrusion; 13. Guide sleeve; 14. Limiting protrusion; 15. Tray; 16. Top plate; 17. Second nut. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0033] The terminology used in the following embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification and appended claims of this utility model, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this utility model refers to and includes any or all possible combinations of one or more of the listed items. The term “exemplary” means “serving as an example, embodiment, or illustration,” and any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. The terms “first” and “second” are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature, and in the description of embodiments of this utility model, unless otherwise stated, “a plurality” means two or more.

[0034] This embodiment provides a high-temperature valve body actuator.

[0035] refer to Figure 1A high-temperature valve body actuator includes: an upper diaphragm cover 1, a lower diaphragm cover 2, a guide rod 3, and a high-temperature resistant metal corrugated diaphragm 4.

[0036] The upper diaphragm cover 1 and the lower diaphragm cover 2 are sealed together, forming an adjustment chamber between them. The upper diaphragm cover 1 has a first connection port 5 for connecting to the downstream pipeline. The lower diaphragm cover 2 has a second connection port 6 for connecting to the upstream pipeline. A guide rod 3 slides through the middle of the lower diaphragm cover 2. A corrugated metal diaphragm 4 is coaxially fixedly connected to one end of the guide rod 3 located in the adjustment chamber, and the other end of the guide rod 3 is coaxially fixedly connected to the piston. The edge of the corrugated metal diaphragm 4 is fixedly connected to the sealed connection between the upper diaphragm cover 1 and the lower diaphragm cover 2. The corrugated metal diaphragm 4 divides the adjustment chamber into an upper adjustment chamber 7 and a lower adjustment chamber 8. The medium from the upstream pipeline can enter the lower adjustment chamber 8, and the medium from the downstream pipeline can enter the upper adjustment chamber 7.

[0037] The thickness of the corrugated metal diaphragm 4 can be adjusted according to the actual pressure parameters and can be set to 0.1mm-0.6mm. The material of the corrugated metal diaphragm 4 can be adjusted according to actual needs and can be made of austenitic stainless steel. The corrugated metal diaphragm 4 can withstand temperatures up to 500℃.

[0038] The high-temperature valve body actuator also includes multiple bolts 9 and multiple first nuts 10. The bolts 9 are threaded sequentially through the upper diaphragm cover 1, the corrugated metal diaphragm 4, and the lower diaphragm cover 2. The first nuts 10 are threaded onto the bolts 9. The multiple bolts 9 are circumferentially and equidistantly distributed along the central axis of the corrugated metal diaphragm 4, with each bolt 9 corresponding to one of the multiple first nuts 10. Through the multiple bolts 9 and the multiple first nuts 10, a sealing connection between the upper diaphragm cover 1 and the lower diaphragm cover 2 is achieved, and the corrugated metal diaphragm 4 is fixed between the upper diaphragm cover 1 and the lower diaphragm cover 2.

[0039] Meanwhile, the upper membrane cover 1 has at least one sealing ring groove 11, and the lower membrane cover 2 has at least one sealing ring protrusion 12. The positions and numbers of the sealing ring protrusions 12 and sealing ring grooves 11 correspond. When the upper membrane cover 1 and the lower membrane cover 2 are sealed together, the sealing ring protrusion 12 presses against the sealing ring groove 11, and the edge of the corrugated metal diaphragm 4 is squeezed between the sealing ring groove 11 and the sealing ring protrusion 12, thereby improving the sealing effect between the corrugated metal diaphragm 4 and the upper membrane cover 1 and the lower membrane cover 2. In this embodiment, both the sealing ring groove 11 and the sealing ring protrusion 12 are two in number.

[0040] The high-temperature valve body actuator also includes a guide sleeve 13, which is fixedly inserted into the middle of the lower diaphragm cover 2. A guide rod 3 is coaxially slidably inserted within the guide sleeve 13. The guide sleeve 13, positioned between the guide rod 3 and the lower diaphragm cover 2, guides the sliding movement of the guide rod 3, ensuring its stability. A limiting protrusion 14 is integrally formed at the end of the guide sleeve 13 closest to the corrugated metal diaphragm 4. The diameter of the limiting protrusion 14 is larger than the diameter of the guide sleeve 13. The limiting protrusion 14 is fixedly connected to the lower diaphragm cover 2, effectively preventing the guide sleeve 13 from falling off during the sliding of the guide rod 3. The limiting protrusion 14 and the lower diaphragm cover 2 are sealed by welding to ensure a tight seal.

[0041] The high-temperature valve body actuator also includes a limiting component, through which the metal corrugated diaphragm 4 is fixedly connected to the guide rod 3. The limiting component includes a tray 15, a top plate 16, and a second nut 17. The second nut 17 is coaxially threaded to the guide rod 3, and the top plate 16 and the tray 15 are clamped on the upper and lower sides of the metal corrugated diaphragm 4 by the second nut 17, that is, the top plate 16 is located in the upper adjustment chamber 7, and the tray 15 is located in the lower adjustment chamber 8.

[0042] The implementation principle of a high-temperature valve body actuator according to an embodiment of this application is as follows: When using the high-temperature valve body actuator, it is connected to the downstream pipeline through the first connection port 5 and to the upstream pipeline through the second connection port 6. The guide rod 3 is coaxially and fixedly connected to the piston on the valve body. When the medium flows through the upstream pipeline, it can enter the lower regulating chamber 8 through the second connection port 6; when the medium flows through the valve body through the downstream pipeline, it can enter the lower regulating chamber 8 through the first connection port 5. The medium in both the upper regulating chamber 7 and the lower regulating chamber 8 generates pressure that acts on the metal bellows diaphragm 4. When the pressure of the transported medium increases, the pressure in the lower regulating chamber 8 increases, causing the metal bellows diaphragm 4 to move upward, which in turn moves the guide rod 3 upward. The upward movement of the guide rod 3 then moves the piston upward, increasing the valve body opening. Subsequently, the pressure in the upper regulating chamber 7 increases synchronously, causing the metal bellows diaphragm 4 to move downward, which in turn moves the guide rod 3 downward, and the downward movement of the piston decreases the valve body opening until the medium pressure reaches a set equilibrium. Similarly, when the pressure of the conveyed medium decreases, the pressure in the lower regulating chamber 8 decreases, causing the metal bellows diaphragm 4 to move downwards, which in turn causes the guide rod 3 to move downwards. The piston's downward movement further reduces the valve opening. Simultaneously, the pressure in the upper regulating chamber 7 decreases, causing the metal bellows diaphragm 4 to move upwards, which in turn causes the guide rod 3 to move upwards, increasing the valve opening until the medium pressure reaches a set equilibrium. During this process, because the metal bellows diaphragm 4 can withstand the high temperature brought by the medium, the actuator can operate under high-temperature medium conditions. It should be understood that the first connection port 5 can connect to the upstream pipeline, and the second connection port 6 connects to the downstream pipeline, achieving the same technical effect.

[0043] This embodiment also provides a self-regulating valve.

[0044] The self-operated control valve includes a valve body and the aforementioned high-temperature valve body actuator. The piston of the valve body is coaxially and fixedly connected to the guide rod 3. The self-operated control valve using the aforementioned high-temperature valve body actuator can operate under high-temperature media.

[0045] The above description of the embodiments is only used to provide a detailed introduction to the technical solution of this utility model. However, the description of the above embodiments is only for the purpose of helping to understand this utility model and should not be construed as a limitation of this utility model. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature valve body actuator, characterized in that, include: The upper membrane cover (1), the lower membrane cover (2), the guide rod (3), and the metal corrugated diaphragm (4) are sealed together and form an adjustment cavity. The upper membrane cover (1) and the lower membrane cover (2) are respectively provided with a first connection port (5) and a second connection port (6). The guide rod (3) slides through the lower membrane cover (2). The metal corrugated diaphragm (4) is set on the guide rod (3). The edge of the metal corrugated diaphragm (4) is fixedly connected to the sealed connection between the upper membrane cover (1) and the lower membrane cover (2). The metal corrugated diaphragm (4) divides the adjustment cavity into an upper adjustment cavity (7) and a lower adjustment cavity (8).

2. The high-temperature valve body actuator as described in claim 1, characterized in that, The thickness of the metal corrugated diaphragm (4) is 0.1mm-0.6mm.

3. The high-temperature valve body actuator as described in claim 2, characterized in that, The corrugated metal diaphragm (4) is made of austenitic stainless steel.

4. The high-temperature valve body actuator as described in claim 3, characterized in that, The upper membrane cover (1) has at least one sealing ring groove (11), and the lower membrane cover (2) has at least one sealing ring protrusion (12). The edge of the metal corrugated diaphragm is pressed between the sealing ring groove (11) and the sealing ring protrusion (12).

5. The high-temperature valve body actuator as described in any one of claims 1-4, characterized in that, The high-temperature valve body actuator also includes: multiple bolts (9) and multiple first nuts (10), wherein the bolts (9) are sequentially threaded through the upper diaphragm cover (1), the metal corrugated diaphragm (4), and the lower diaphragm cover (2), and the first nuts (10) are threaded onto the bolts (9).

6. The high-temperature valve body actuator as described in any one of claims 1-4, characterized in that, The high-temperature valve body actuator further includes: a guide sleeve (13), which is fixed to the lower diaphragm cover (2), and the guide rod (3) is slidably inserted into the guide sleeve (13).

7. The high-temperature valve body actuator as described in claim 6, characterized in that, The guide sleeve (13) is provided with a limiting protrusion (14) at one end near the metal corrugated diaphragm (4). The diameter of the limiting protrusion (14) is larger than the diameter of the guide sleeve (13). The limiting protrusion is sealed and welded to the lower diaphragm cover (2).

8. The high-temperature valve body actuator as described in any one of claims 1-4, characterized in that, The high-temperature valve body actuator also includes a limiting member, wherein the metal corrugated diaphragm (4) is mounted on the guide rod (3) via the limiting member.

9. The high-temperature valve body actuator as described in claim 8, characterized in that, The limiting component includes a tray (15), a top plate (16), and a second nut (17); the second nut (17) is coaxially threaded onto the guide rod (3), and the top plate (16) and the tray (15) are clamped on both sides of the metal corrugated diaphragm (4) by the second nut (17).

10. A self-operated regulating valve, characterized in that, include: The valve body and the high-temperature valve body actuator as described in any one of claims 1-9, wherein the piston of the valve body is coaxially and fixedly connected to the guide rod (3).

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