Valve opening and closing position detection device

Abstract

The utility model discloses a valve opening and closing position detection device which comprises a valve, the valve comprises a valve seat and a valve rod, a fixing assembly is fixed to the valve seat, a follow-up assembly is fixed to the valve rod, and a limiting vertical face for limiting clockwise and / or anticlockwise rotation of the follow-up assembly is formed on the fixing assembly. The fixing assembly is provided with a position detection assembly facing the opening position and / or the closing position of the follow-up assembly. The valve has the beneficial effects that rotation limiting of the follow-up assembly is achieved through the limiting vertical face, the follow-up assembly is matched with the position detection assembly, and detection of the opening and closing position of the valve is achieved; the wear-resistant limiting vertical face is arranged in any rotation direction of the valve rod of the valve, rotation of the valve rod in the opening and closing process is limited within a certain range, and therefore the position detection assembly can effectively detect the opening or closing state of the valve. And the wear-resistant limiting vertical surface is made of engineering plastics, preferably Teflon, so that static electricity and sparks are prevented from being generated during friction, and the device can be used in a dangerous explosion environment.

Description

Technical Field

[0001] This application belongs to the technical field of valve accessories, and specifically relates to a valve opening and closing position detection device. Background Art

[0002] A pneumatic valve is a valve that uses compressed air to push multiple sets of combined pneumatic pistons inside the actuator. Currently, when pneumatic valves are in production and use, the following problems exist.

[0003] 1. Due to the structure of the pneumatic valve itself, the valve stem will rotate in the direction of the spring installation during long-term opening and closing use.

[0004] 2. When a common photoelectric sensor is used to detect the opening and closing position of the valve, in a low-temperature environment (such as a low-temperature environment below -40°C), the photoelectric sensor will fail and cannot work properly in this low-temperature environment. Utility Model Content

[0005] The purpose of this application is to provide a valve opening and closing position detection device, which solves the problems of valve stem rotation and inapplicability at low temperatures existing in valves.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] A valve opening and closing position detection device includes a valve. The valve includes a valve seat and a valve stem that moves up and down relative to the valve seat. A fixed component is fixed on the valve seat, and a follower component is fixed on the valve stem. A limiting vertical surface that restricts the clockwise and / or counterclockwise rotation of the follower component is formed on the fixed component, and a position detection component that faces the opening position and / or closing position of the follower component is provided on the fixed component.

[0008] Further, the position detection component is a mechanical limit switch.

[0009] Further, the fixed component includes a horizontal plate and a vertical plate. The horizontal plate is connected to the vertical plate. A limiting vertical surface is formed on the horizontal plate, and a position detection component is provided on the vertical plate.

[0010] Further, a valve seat groove is provided on the horizontal plate. The valve seat is fixed in the fixing hole of the valve seat groove, and the position detection component is fixed in the placement hole of the vertical plate.

[0011] Further, both the fixing hole and the placement hole are of a long hole structure.

[0012] Further, limiting vertical surfaces are formed on the same side at both ends of the horizontal plate.

[0013] Further, a wear-resistant plate is provided on the horizontal plate, and a limiting vertical surface is formed on the surface of the wear-resistant plate.

[0014] Further, the wear-resistant plate is made of Teflon.

[0015] Further, the follower assembly includes a follower flat plate which is arranged on the valve stem.

[0016] Further, a U-shaped valve stem groove is arranged on the follower flat plate, and the valve stem is arranged in the valve stem groove.

[0017] Advantages of this application:

[0018] (1) The limiting vertical surface realizes the rotational limit of the follower assembly, and the position detection assembly is used in cooperation with the follower assembly to realize the detection of the opening and closing positions of the valve.

[0019] (2) Wear-resistant limiting vertical surfaces are arranged in any rotational direction of the valve stem of the valve, and the rotation of the valve stem during the opening and closing processes is limited within a certain range, so that the position detection assembly can effectively detect the opening or closing state of the valve.

[0020] (3) The wear-resistant limiting vertical surface is made of engineering plastics, preferably Teflon, to avoid generating static electricity and sparks during friction, so that the device can be used in dangerous and explosive environments.

[0021] The main solution of this application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are the solutions that can be adopted and claimed in this application; and in this application, (each non-conflicting alternative) can be freely combined with each other and with other alternatives. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding this solution, all of which are the technical solutions to be protected in this application, and will not be enumerated here. Description of the drawings

[0022] Figure 1 is the structural schematic diagram of this application.

[0023] Figure 2 is the front view of the structure of the fixing assembly of this application.

[0024] Figure 3 is the top view of the structures of the fixing assembly and the follower assembly of this application.

[0025] In the figure: 1-valve, 2-position detection assembly, 3-fixing assembly, 4-follower assembly; 101-valve seat, 102-valve stem, 301-horizontal vertical plate, 302-vertical plate, 303-valve seat groove, 304-fixing hole, 305-placement hole, 306-wear-resistant plate, 401-follower flat plate, 402-valve stem groove. Detailed implementation manners

[0026] The following further describes this application with reference to specific embodiments and the drawings.

[0027] ReferenceFigures 1 to 3 As shown in the figure, a valve opening and closing position detection device includes a valve 1, a position detection component 2, a fixing component 3, and a follower component 4.

[0028] The valve 1 is an ordinary pneumatic valve. After connecting to the air source, the valve opens. After disconnecting the air source, the valve automatically closes under the action of the spring in the valve body. Similarly, the valve 1 can also be a valve with other similar structures. The valve 1 includes a valve seat 101 and a valve stem 102 that moves up and down relative to the valve seat 101.

[0029] The fixing component 3 is fixed on the valve seat 101. The fixing component 3 is used to place the position detection component 2 and also used to limit the rotation of the follower component 4. A limiting vertical surface for restricting the clockwise and / or counterclockwise rotation of the follower component 4 is formed on the fixing component 3. The position detection component 2 facing the open position and / or the closed position of the follower component 4 is provided on the fixing component 3. The rotation of the follower component 4 along the valve stem 102 is restricted by the limiting vertical surface to ensure that the position detection component 2 is directly opposite to the follower component 4, rather than rotating to a position where the position detection component 2 cannot detect.

[0030] The follower component 4 is fixed on the valve stem 102. The follower component 4 moves up and down and rotates together with the valve stem 102. By restricting the rotation of the follower component 4, the follower component 4 is prevented from rotating together with the valve stem 102, thereby ensuring the stability of the movement position of the follower component 4 and realizing the normal progress of position detection. By detecting the position of the follower component 4, the position of the valve stem is detected, thereby judging the opening and closing position of the valve.

[0031] The position detection component 2 is a mechanical limit switch. This limit switch is purely mechanical and does not require any electronic components inside. It can be applied to low-temperature environments, such as low-temperature environments below -40°C. The specific detection of the open and closed states by the position detection component 2 is determined by the usage situation. The installation method and position of the position detection component 2 determine the detection of the opening or closing of the pneumatic valve. Figure 1 Shown is the detection of the closed state of the pneumatic valve.

[0032] The fixing component 3 includes a horizontal plate 301 and a vertical plate 302. The horizontal plate 301 and the vertical plate 302 are of an integral structure, or two detachable connected parts can also be used. The horizontal plate 301 and the vertical plate 302 are connected to form an L-shaped structure. A limiting vertical surface is formed on the horizontal plate 301, and the position detection component 2 is provided on the vertical plate 302.

[0033] A valve seat groove 303 with a U-shaped structure is provided in the middle of the horizontal standing plate 301. The valve seat 101 is fixed on the fixing holes 304 of the valve seat groove 303 by screws. The position detection component 2 is fixed in the placement hole 305 of the vertical plate 302 by screws. Both the fixing holes 304 and the placement holes 305 are long hole structures arranged vertically, which facilitates the position adjustment of the fixing component 3 and the position detection component 2, so that the limit switch can exactly detect the opening or closing state of the pneumatic valve. Since the horizontal standing plate 301 includes the middle concave valve seat groove 303, the positions of both ends of the horizontal standing plate and the vertical plate 302 are pushed towards the middle, which facilitates the action of the limit vertical surface and the position detection component 2 on the follower component 4.

[0034] Because the rotation direction of the valve stem of the pneumatic valve is determined by the rotation direction of the spring inside the pneumatic valve, limit vertical surfaces for restricting rotation are provided in both rotation directions of the fixing component and the follower component. Limit vertical surfaces are formed on the same side of both ends of the horizontal standing plate 301. By using the limit vertical surfaces at both ends, the clockwise and counterclockwise rotations of the follower component 4 can be restricted.

[0035] A detachable wear-resistant plate 306 is provided on the horizontal standing plate 301 by screws. A limit vertical surface is formed on the surface of the wear-resistant plate 306. The wear-resistant plate 306 is preferably made of Teflon (polytetrafluoroethylene, PTFE), and other wear-resistant materials can also be used. The long-term frictional contact of the follower component 4 is realized through the wear-resistant plate 306.

[0036] The follower component 4 includes a follower flat plate 401. The follower flat plate 401 is welded on the valve stem 102. A U-shaped valve stem groove 402 is provided on the follower flat plate 401. The valve stem 102 is welded in the valve stem groove 402 to realize the synchronous up and down movement of the follower flat plate 401 and the valve stem 102. The follower flat plate 401 is used to be installed and fixed on the valve stem of the pneumatic valve, and moves up and down with the opening and closing of the pneumatic valve. When the pneumatic valve reaches the detection position according to the detection requirement, it contacts the limit switch, so that the limit switch detects the opening or closing signal of the pneumatic valve.

[0037] The foregoing basic examples and their respective further alternative examples of the present application can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, any alternative example can be arbitrarily combined with any basic example and alternative example.

[0038] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements 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 and closing position detection device, comprising a valve (1), the valve (1) comprising a valve seat (101) and a valve stem (102) that moves up and down relative to the valve seat (101), characterized in that: A fixed component (3) is fixed on the valve seat (101), a follower component (4) is fixed on the valve stem (102), a limiting vertical surface for limiting the clockwise and / or counterclockwise rotation of the follower component (4) is formed on the fixed component (3), and a position detection component (2) facing the open position and / or closed position of the follower component (4) is provided on the fixed component (3).

2. The valve opening and closing position detection device according to claim 1, characterized in that: The position detection component (2) is a mechanical limit switch.

3. The valve opening and closing position detection device according to claim 1 or 2, characterized in that: The fixing assembly (3) comprises a transverse plate (301) and a vertical plate (302), wherein the transverse plate (301) is connected to the vertical plate (302), a limited vertical surface is formed on the transverse plate (301), and a position detection assembly (2) is provided on the vertical plate (302).

4. The valve opening and closing position detection device according to claim 3, characterized in that: The horizontal plate (301) is provided with a valve seat groove (303), the valve seat (101) is fixed on a fixing hole (304) of the valve seat groove (303), and the position detection component (2) is fixed in a placement hole (305) of the vertical plate (302).

5. The valve opening and closing position detection device according to claim 4, characterized in that: The fixing hole (304) and the placement hole (305) are both long hole structures.

6. The valve opening and closing position detection device according to claim 3, characterized in that: The same side of both ends of the horizontal vertical plate (301) forms a limited vertical surface.

7. The valve opening and closing position detection device according to claim 3, characterized in that: The horizontal vertical plate (301) is provided with a wear-resistant plate (306), and the surface of the wear-resistant plate (306) forms a limiting vertical surface.

8. The valve opening and closing position detection device according to claim 7, characterized in that: The wear-resistant plate (306) is made of Teflon.

9. The valve opening and closing position detection device according to claim 1, characterized in that: The follower assembly (4) comprises a follower plate (401), and the follower plate (401) is arranged on the valve stem (102).

10. The valve opening and closing position detection device according to claim 9, characterized in that: The follower plate (401) is provided with a U-shaped valve stem groove (402), and the valve stem (102) is arranged in the valve stem groove (402).

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