Pneumatic adjusting valve connecting rod device

Abstract

The utility model provides a pneumatic regulating valve connecting rod device which comprises a mounting box and a driving plate, positioning rods are symmetrically connected to the middle of the interior of the mounting box, positioning holes are correspondingly formed in the positions, opposite to the positioning rods, of the surface of a movable plate, movable grooves are symmetrically formed in the two ends of the movable plate, and the driving plate is movably connected into the movable grooves through bearings. Meanwhile, penetrating openings are symmetrically formed in the side, away from the pneumatic actuator, of the mounting box, limiting rods are fixedly connected into the penetrating openings, the end, away from the movable plate, of the driving plate is movably connected with one end of a driven plate through a bearing, the other end of the driven plate is movably connected with a push plate through a bearing, and limiting grooves are correspondingly formed in the positions, opposite to the limiting rods, of the surface of the driven plate; and the push plate is slidably connected into a through groove formed in the fixed plate. Through the cooperation of the pneumatic actuator, the moving plate, the connecting rod assembly and the clamping plate, the connecting rod device can correspondingly fix the valve rod, and then the probability that the valve rod accidentally moves can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic regulating valves, in particular to a pneumatic regulating valve connecting rod device. Background Art

[0002] Pneumatic control valve uses compressed gas as power source, cylinder as actuator, and with the help of valve positioner, converter, solenoid valve, position-holding valve, gas storage tank, gas filter and other accessories to drive the valve, realize switch quantity or proportional regulation, and receive control signals from industrial automation control system to adjust pipeline medium: flow, pressure, temperature, liquid level and other process parameters. The characteristics of pneumatic control valve are simple control, fast response, and inherent safety, without the need for additional explosion-proof measures. In power plants, pneumatic control valves are mainly used to control the flow and pressure of the medium to ensure the stability and efficiency of the power generation process.

[0003] After searching, a pneumatic regulating valve disclosed in the prior art (application number: CN201920958890.5) is recorded in the article: "A pneumatic regulating valve includes a valve body, and connecting blocks are welded at the edges of both ends of the valve body. The connecting block is a hollow structure. A frame is vertically embedded in the interior of the connecting block. A circular hole is vertically opened at the center of the top of the frame. There are two circular holes in total, and the two circular holes are symmetrical about the horizontal midline of the frame. Strong springs are vertically welded at the centers of the inner bottom plates of the two circular holes. A protrusion is welded at one end of the strong spring away from the inner bottom plate of the circular hole, and the protrusion is engaged with the inside of a U-shaped groove opened at the center of the top of the inner surface wall of the connecting block. A filter screen is vertically embedded in the inner surface wall of the frame. The outer surface of the frame is close to one end edge A tie rod is welded at the edge of the valve body. "; The pneumatic control valve is welded with a connecting piece on the top of the valve body, and the connecting piece consists of a first clamp and a second clamp. The first clamp is clamped in the inside of the empty slot opened near the four corners of the top of the second clamp. The second support rod in the empty slot passes through the center of the vertical rod welded at the bottom of the first clamp. The first clamp and the second clamp are fixed to facilitate the connection between the valve body and the controller, and also to facilitate the replacement of the valve body. The operation steps are simple, but the pneumatic control valve mainly controls the rise and fall of the valve stem by adjusting the air pressure in the cavity to achieve the purpose of controlling the flow. When the fluid pressure inside the valve body is too large, the valve stem is subjected to a large force, and a high pressure is maintained in the actuator cavity. The valve stem control method is single, which easily leads to uncontrolled displacement of the valve stem, thereby affecting the accuracy of flow regulation. Utility Model Content

[0004] In order to overcome the defects of the prior art, a pneumatic regulating valve connecting rod device is now provided to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, a pneumatic regulating valve connecting rod device is provided, comprising: an installation box and an active plate, the outer side surface of the installation box is fixedly connected to the pneumatic actuator, and the telescopic rod of the pneumatic actuator is fixedly connected to the movable plate, the middle part of the installation box is symmetrically connected to the positioning rod, and a positioning hole is provided on the surface of the movable plate corresponding to the position of the positioning rod, and movable grooves are symmetrically provided at both ends of the movable plate, the active plate is movably connected to the movable groove through a bearing, and at the same time, a through-hole is symmetrically provided on the side of the installation box away from the pneumatic actuator, and a limiting rod is fixedly connected in the through-hole, one end of the active plate away from the movable plate is movably connected to one end of the driven plate through a bearing, and the other end of the driven plate is movably connected to the push plate through a bearing, and a limiting groove is provided on the surface of the driven plate corresponding to the position of the limiting rod, and the push plate is slidably connected to the through-hole provided in the fixed plate, and at the same time, the fixed plate is fixedly connected to the surface of the installation box, and one end of the push plate away from the driven plate is fixedly connected to the clamping plate, and the clamping plate is fixedly connected to the valve stem through a fastening layer.

[0006] Preferably, the installation box is in a rectangular structure, and the two groups of through-holes symmetrically opened on the surface of the installation box are both in a rectangular structure, and the limiting rods fixedly connected in the through-holes are in a cylindrical structure.

[0007] Preferably, there are two groups of positioning rods, both of which are cylindrical in structure, and the sizes of the positioning holes and the positioning rods are matched, and the cross-section formed by the combination of the mounting box and the positioning rods is in a mesh-shaped structure.

[0008] Preferably, the movable plate is in a rectangular structure as a whole, and the two groups of movable grooves opened on the end surfaces of both ends of the movable plate are in a square structure, and the movable plate and the movable grooves are combined together to form an I-shaped structure.

[0009] Preferably, the active plate, driven plate and push plate are all rectangular structures, and the active plate, driven plate and push plate are combined together through bearings to form a connecting rod assembly, and the driven plate is slidably connected in the through-hole, and the limit groove opened on the surface of the driven plate is rectangular structure, and the sizes of the limit groove and the limit rod are matched.

[0010] Preferably, there are two groups of fixing plates, both groups of fixing plates are in a convex shape, and the through grooves opened at the larger ends of the fixing plates are in a rectangular structure, and the sizes of the through grooves and the push plates are matched.

[0011] Preferably, the clamping plate is in a fan-shaped ring structure, and the central angle of the clamping plate is less than one hundred and eighty degrees, and the fastening layer fixedly connected to the inner arc surface of the clamping plate is in a fan-shaped ring structure, and at the same time, a plurality of groups of adsorption holes are opened in the middle of the inner arc surface of the fastening layer at equal intervals along the circumferential direction, and the adsorption holes are in a truncated cone structure.

[0012] Compared with the prior art, the beneficial effect of the utility model is that through the cooperation of the pneumatic actuator, the movable plate, the active plate, the driven plate and the push plate, the clamping plate can clamp and fix the valve stem accordingly, thereby helping to enhance the stability of the valve stem during placement, and diversifying the control method of the valve stem, which can effectively reduce the probability of uncontrolled displacement of the valve stem due to large force, thereby helping to improve the flow regulation accuracy of the pneumatic regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0014] Figure 2 It is a side view schematic diagram of an embodiment of the utility model.

[0015] Figure 3 It is a top view schematic diagram of an embodiment of the utility model.

[0016] Figure 4 This is a schematic diagram of a front view of a clamped valve stem according to an embodiment of the utility model.

[0017] In the figure: 1. pneumatic actuator; 2. mounting box; 3. moving plate; 4. positioning rod; 5. active plate; 6. limit rod; 7. driven plate; 8. push plate; 9. fixed plate; 10. clamping plate; 11. fastening layer; 12. valve stem. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4 As shown, the utility model provides a pneumatic regulating valve connecting rod device, including: a mounting box 2 and an active plate 5, the outer side of the mounting box 2 is fixedly connected to the pneumatic actuator 1, and the telescopic rod of the pneumatic actuator 1 is fixedly connected to the moving plate 3, the middle part of the mounting box 2 is symmetrically connected to the positioning rod 4, and the surface of the moving plate 3 is provided with positioning holes corresponding to the position of the positioning rod 4, and movable grooves are symmetrically provided at both ends of the moving plate 3, and the active plate 5 is movably connected to the movable groove through a bearing, and at the same time, a through opening is symmetrically provided on the side of the mounting box 2 away from the pneumatic actuator 1 , a limit rod 6 is fixedly connected in the through-hole, one end of the active plate 5 away from the movable plate 3 is movably connected to one end of the driven plate 7 through a bearing, and the other end of the driven plate 7 is movably connected to the push plate 8 through a bearing, and a limit groove is provided on the surface of the driven plate 7 corresponding to the position of the limit rod 6, and the push plate 8 is slidably connected in the through-groove provided in the fixed plate 9, and the fixed plate 9 is fixedly connected to the surface of the mounting box 2, and the end of the push plate 8 away from the driven plate 7 is fixedly connected to the clamping plate 10, and the clamping plate 10 is fixedly connected to the valve stem 12 through the fastening layer 11.

[0019] When the valve stem 12 of the pneumatic regulating valve of the power plant moves to the predetermined position, the switch of the pneumatic actuator 1 is started, and the telescopic rod of the pneumatic actuator 1 pushes the movable plate 3 to move, and then the movable plate 3 drives one end of the active plate 5 to move synchronously, while the other end of the active plate 5 drives the driven plate 7 to move synchronously through the bearing, and the driven plate 7 is restricted by the limit rod 6, so that the two ends of the driven plate 7 rotate accordingly, so that the movement of the driven plate 7 away from the active plate 5 can push the push plate 8 to move, and then the two groups of push plates 8 can push the corresponding two groups of clamping plates 10 to move relative to each other, so that the two groups of clamping plates 10 can clamp the surface of the valve stem 12 through the fastening layer 11, and at the same time, the adsorption hole opened in the middle of the inner arc surface of the fastening layer 11 can form a negative pressure environment when it deforms itself, thereby helping to enhance the fixing effect of the clamping plate 10 on the valve stem 12, and effectively reducing the probability of uncontrolled displacement of the valve stem 12 due to excessive force.

[0020] As a preferred embodiment, the installation box 2 is a rectangular parallelepiped structure, and the two groups of through-holes symmetrically opened on the surface of the installation box 2 are both rectangular structures, and the limiting rods 6 fixedly connected in the through-holes are cylindrical structures.

[0021] In this embodiment, if Figure 1 and Figure 4 The through hole opened in the mounting box 2 can not only help enhance the stability of the driven plate 7 during rotation, but also limit the rotation range of the driven plate 7. At the same time, the setting of the positioning rod 4 enables the driven plate 7 to rotate accordingly under the push of the active plate 5, thereby realizing the clamping and fixing of the valve stem 12 by the clamping plate 10.

[0022] As a preferred embodiment, there are two groups of positioning rods 4, both groups of positioning rods 4 are cylindrical structures, and the sizes of the positioning holes and the positioning rods 4 are adapted. At the same time, the cross-section formed by the combination of the mounting box 2 and the positioning rods 4 is a mesh-shaped structure.

[0023] In this embodiment, if Figure 1 , Figure 3 and Figure 4 The sizes of the positioning hole and the positioning rod 4 are matched, which can then help enhance the stability of the moving plate 3 during movement, thereby ensuring that the moving plate 3 can drive the connecting rod assembly to transmit smoothly.

[0024] As a preferred embodiment, the movable plate 3 is in a rectangular structure as a whole, and the two groups of movable grooves opened on the end surfaces of the movable plate 3 are both in a square structure, and the movable plate 3 and the movable grooves are combined together to form an I-shaped structure.

[0025] In this embodiment, if Figure 1 and Figure 3The movable grooves symmetrically opened at both ends of the movable plate 3 enable the two ends of the movable plate 3 to be movably connected to the two sets of active plates 5, so that when the movable plate 3 moves, the clamping plates 10 corresponding to the two sets of connecting rod assemblies can move relative to or away from each other, thereby enabling the clamping plates 10 to clamp and fix the valve stem 12 or release the fixation of the valve stem 12.

[0026] As a preferred embodiment, the active plate 5, the driven plate 7 and the push plate 8 are all rectangular structures, and the active plate 5, the driven plate 7 and the push plate 8 are combined together through bearings to form a connecting rod assembly, and the driven plate 7 is slidably connected in the through-hole, and the limit groove opened on the surface of the driven plate 7 is a rectangular structure, and the size of the limit groove and the limit rod 6 are matched.

[0027] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The setting of the connecting rod assembly enables the two groups of clamping plates 10 to move relative to or away from each other, thereby effectively enhancing the clamping and fixing effect of the clamping plates 10 on the valve stem 12, effectively enhancing the stability of the valve stem 12 when it is placed, and reducing the probability of accidental movement of the valve stem 12 due to excessive force.

[0028] As a preferred embodiment, there are two groups of fixing plates 9, both of which are convex-shaped structures, and the through grooves opened at the larger ends of the fixing plates 9 are rectangular structures, and the sizes of the through grooves and the push plates 8 are matched.

[0029] In this embodiment, if Figure 1 and Figure 2 The setting of the fixed plate 9 enables the push plate 8 to drive the clamping plate 10 to move stably, avoiding accidental tilting or shaking of the push plate 8 and the corresponding clamping plate 10, thereby ensuring that the two sets of clamping plates 10 can clamp the two sides of the valve stem 12 in the same plane, thereby enhancing the fixing effect of the clamping plate 10 on the valve stem 12.

[0030] As a preferred embodiment, the clamping plate 10 is in a fan-shaped ring structure, and the central angle of the clamping plate 10 is less than one hundred and eighty degrees, and the fastening layer 11 fixedly connected to the inner arc surface of the clamping plate 10 is in a fan-shaped ring structure, and at the same time, a plurality of groups of adsorption holes are opened in parallel and at equal intervals along the circumferential direction in the middle part of the inner arc surface of the fastening layer 11, and the adsorption holes are in a truncated cone structure.

[0031] In this embodiment, if Figure 1 and Figure 4The structural setting of the clamping plate 10 enables the clamping plate 10 to over-clamp the valve stem 12, thereby temporarily enhancing the fixing effect of the clamping plate 10 on the valve stem 12. At the same time, the fastening layer 11 is made of soft rubber material, which can help increase the friction resistance between the clamping plate 10 and the valve stem 12. At the same time, the setting of the adsorption hole enables the fastening layer 11 to form a negative pressure environment in the adsorption hole when it is deformed by force, thereby helping to enhance the fixing effect of the fastening layer 11 on the valve stem 12.

[0032] The pneumatic regulating valve connecting rod device of the utility model can perform corresponding fixing treatment on the valve stem 12 through the cooperation of the pneumatic actuator 1, the moving plate 3, the connecting rod assembly and the clamping plate 10, thereby reducing the probability of accidental movement of the valve stem 12. At the same time, through the cooperation of the clamping plate 10, the fastening layer 11 and the adsorption hole, the connecting rod device can perform multiple fixations on the valve stem 12, increase the number of control methods of the valve stem 12, and reduce the probability of accidental movement of the valve stem 12 due to excessive force.

Claims

1. A pneumatic regulating valve connecting rod device, comprising: An installation box (2) and a driving plate (5). The outer side surface of the installation box (2) is fixedly connected with a pneumatic actuator (1), and the telescopic rod of the pneumatic actuator (1) is fixedly connected with a moving plate (3). It is characterized in that: positioning rods (4) are symmetrically connected in the middle of the installation box (2), positioning holes are correspondingly opened on the surface of the moving plate (3) at positions corresponding to the positioning rods (4), and movable slots are symmetrically opened at both ends of the moving plate (3). The driving plate (5) is movably connected in the movable slots through bearings. At the same time, through openings are symmetrically opened on one side of the installation box (2) far from the pneumatic actuator (1), and limiting rods (6) are fixedly connected in the through openings. One end of the driving plate (5) far from the moving plate (3) is movably connected with one end of a driven plate (7) through a bearing, and the other end of the driven plate (7) is movably connected with a pushing plate (8) through a bearing. Limiting slots are correspondingly opened on the surface of the driven plate (7) at positions corresponding to the limiting rods (6), and the pushing plate (8) is slidably connected in a through slot opened on a fixing plate (9). At the same time, the fixing plate (9) is fixedly connected to the surface of the installation box (2), and one end of the pushing plate (8) far from the driven plate (7) is fixedly connected with a clamping plate (10). The clamping plate (10) is fixedly connected with a valve rod (12) through a fastening layer (11).

2. A pneumatic regulating valve connecting rod device according to claim 1, characterized in that: The installation box (2) is of a cuboid structure, and the two groups of through openings symmetrically opened on the surface of the installation box (2) are both of a rectangular structure, and the limiting rods (6) fixedly connected in the through openings are of a cylindrical structure.

3. A pneumatic regulating valve connecting rod device according to claim 1, characterized in that: There are two groups of the positioning rods (4). Both groups of positioning rods (4) are of a cylindrical structure, and the sizes of the positioning holes and the positioning rods (4) are adapted to each other. At the same time, the cross-section formed by the combination of the installation box (2) and the positioning rods (4) is of a structure like the Chinese character'mu'.

4. A pneumatic regulating valve connecting rod device according to claim 1, characterized in that: The moving plate (3) is of an overall rectangular structure, and the two groups of movable slots opened at both end faces of the moving plate (3) are both of a square structure, and the combination of the moving plate (3) and the movable slots forms a structure like the Chinese character 'gong'.

5. The pneumatic regulating valve connecting rod device according to claim 1, characterized in that: The driving plate (5), the driven plate (7) and the pushing plate (8) are all of a rectangular structure, and the driving plate (5), the driven plate (7) and the pushing plate (8) form a link assembly through bearings. The driven plate (7) is slidably connected in the through opening, and the limiting slot opened on the surface of the driven plate (7) is of a rectangular structure, and the sizes of the limiting slot and the limiting rod (6) are adapted to each other.

6. A pneumatic regulating valve connecting rod device according to claim 1, characterized in that: There are two groups of the fixing plates (9). Both groups of fixing plates (9) are of a convex-shaped structure, and the through slot opened at the larger end of the fixing plate (9) is of a rectangular structure. At the same time, the sizes of the through slot and the pushing plate (8) are adapted to each other.

7. The pneumatic regulating valve connecting rod device according to claim 1, characterized in that: The clamping plate (10) is of a sector-annular structure, and the central angle of the clamping plate (10) is less than 180 degrees. The fastening layer (11) fixedly connected to the inner arc surface of the clamping plate (10) is of a sector-annular structure. At the same time, a plurality of adsorption holes are opened along the circumferential direction in parallel and at equal intervals in the middle of the inner arc surface of the fastening layer (11), and the adsorption holes are of a frustum-shaped structure.

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