Linear precision calibration device for pneumatic valve positioner

Abstract

The pneumatic valve positioner linear precision calibration device comprises a working table plate and a calibrator placed on the upper left side of the working table plate, the upper end of the calibrator is connected with a connecting line in an inserted mode, and the right end of the connecting line is connected with the rear end of a pneumatic valve body in an inserted mode; an adjustable first limiting assembly is arranged on the right side of the working table plate, and a movable second limiting assembly is arranged on the left side of the working table plate. A first connecting shaft is fixedly connected to the middle position of the bottom end of the working table plate; the left lower end of the bearing table is rotationally connected with first connecting strips in a front-back symmetrical mode, and the right ends of the first connecting strips are rotationally connected to the front end and the rear end of the first adjusting plate correspondingly. According to the linear precision calibration device for the pneumatic valve positioner, a pneumatic valve and a calibrator can be conveniently limited and prevented from falling down, the angle can be conveniently adjusted for testing, and meanwhile the height is easily adjusted to be suitable for different workers.

Description

Technical Field

[0001] This invention relates to the technical field of linear accuracy calibration devices for pneumatic valve positioners, specifically a linear accuracy calibration device for pneumatic valve positioners. Background Technology

[0002] Pneumatic valve positioners are core accessories for pneumatic control valves and are widely used in chemical, petroleum, and metallurgical industries to precisely control the pressure, flow, and temperature parameters of gases, liquids, and other media. The linear accuracy of the positioner needs to be calibrated during installation and use, which is generally done through a calibration device. Currently, there are many types of pneumatic valve positioner linear accuracy calibration devices on the market to meet certain needs.

[0003] Based on actual production and processing experience, current pneumatic valve positioner linear accuracy calibration devices still have some problems. For example, when the pneumatic valve and calibrator are placed directly on the table, even slight pulling during calibration can cause them to tip over, affecting work efficiency. Furthermore, it's inconvenient to adjust the angle for testing depending on the operator's position. Additionally, the fixed table height is cumbersome due to varying operator heights, making it difficult to adjust for different heights. Summary of the Invention

[0004] The purpose of this invention is to provide a linear accuracy calibration device for a pneumatic valve positioner, in order to solve the problems in the prior art mentioned above, such as the inconvenience of limiting the pneumatic valve and calibrator, the easy tipping of the pneumatic valve and calibrator, the inconvenience of adjusting the angle for testing, and the difficulty in adjusting the height to suit workers of different heights.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a linear accuracy calibration device for a pneumatic valve positioner, comprising a worktable, a connecting plate, and a first adjusting plate. A calibrator is placed on the upper left side of the worktable, and a pneumatic valve is placed on the upper right side of the worktable. A connecting wire is inserted into the upper end of the calibrator. The right end of the connecting wire is inserted into the rear end of the pneumatic valve. A positioner is installed inside the pneumatic valve. An adjustable first limiting component is provided on the right side of the worktable, and a movable second limiting component is provided on the left side of the worktable. A connecting shaft A is fixedly connected to the middle position of the bottom end of the worktable. The lower end of the connecting shaft A is rotatably connected to the middle position of the upper end of a support frame. The support frame is embedded in the upper end of a bearing platform. An adjusting block is nested inside the rear end of the connecting plate. A connecting strip is symmetrically rotatably connected to the lower left end of the bearing platform, and the right ends of the connecting strip are rotatably connected to the front and rear ends of the first adjusting plate, respectively. The lower end of the first adjusting plate is slidably connected inside the first connecting groove.

[0006] Furthermore, the first limiting component includes a first connecting port, a first adjusting rod, a first limiting plate, and a first protective pad. The first connecting port is located inside the upper right end of the worktable, and the first adjusting rod is rotatably connected inside the first connecting port. The first limiting plate is symmetrically threaded onto the first adjusting rod. The first limiting plate is slidably connected inside the first connecting port, and the first protective pad is embedded in the upper inner end of the first limiting plate.

[0007] Furthermore, the outer surface of the first adjusting rod has a bidirectional threaded structure; the first limiting plate forms a sliding structure on the upper side of the workbench through the first adjusting rod and the first connecting port.

[0008] Furthermore, the second limiting component includes a second connecting port, a second adjusting rod, a second limiting plate, and a second protective pad; the second connecting port is opened inside the upper left end of the worktable, and the second adjusting rod is rotatably connected inside the second connecting port; the left and right ends of the second adjusting rod are threadedly connected to the second limiting plate; the lower end of the second limiting plate is slidably connected inside the second connecting port, and the upper end of the inner part of the second limiting plate is embedded with the second protective pad.

[0009] Furthermore, the second limiting plate forms a sliding structure on the upper side of the worktable via the second adjusting rod and the second connecting port, and the threads at the left and right ends of the second adjusting rod run in opposite directions.

[0010] Furthermore, the adjusting block is embedded in the upper right end of the connecting handle; the lower left end of the connecting handle is fixedly connected to the connecting shaft B; the connecting shaft B is rotatably connected to the upper left end of the support frame, and the lower end of the connecting shaft B is equipped with a motor a.

[0011] Furthermore, the workbench plate forms a rotating structure on the upper side of the support frame via a connecting handle and a connecting disc; the number of rotations of the connecting disc is one-quarter of the number of rotations of the connecting handle.

[0012] Furthermore, the first connecting groove is located at the bottom center of the connecting frame; an installation block is embedded in the inner wall of the left end of the connecting frame; a second connecting strip is symmetrically rotatably connected to the right end of the installation block; the upper ends of the second connecting strip are rotatably connected to the front and rear ends of the second adjusting plate respectively, and the middle position of the second connecting strip is rotatably connected to the first connecting strip; the first connecting strip and the second connecting strip form an "X" shaped structure.

[0013] Furthermore, a guide rod is connected through the middle of the second adjusting plate; the guide rod is fixedly connected inside the second connecting groove, which is located inside the lower right end of the support platform; the upper end of the second adjusting plate is slidably connected inside the second connecting groove.

[0014] Furthermore, a threaded rod is threadedly connected to the middle position of the first adjusting plate; the threaded rod is rotatably connected inside the connecting frame, and a motor b is installed at the left end of the threaded rod; the support platform forms a lifting structure on the upper side of the connecting frame through the first adjusting plate and the second connecting strip.

[0015] Compared with the prior art, the present invention has the following advantages: This pneumatic valve positioner linear accuracy calibration device, by setting a first limiting component and a second limiting component on the upper side of the worktable, allows the lower ends of the two sets of first limiting plates to slide inward with the cooperation of the first adjusting rod and the first connecting port, so that the first protective pad tightly abuts against the lower end of the pneumatic valve. At the same time, with the help of the second adjusting rod and the second connecting port, the left and right symmetrical second limiting plates are driven to move inward, so that the second protective pad abuts against both ends of the calibrator, thereby limiting the pneumatic valve and the calibrator and preventing them from falling over. The device is equipped with a connecting shaft A and a connecting plate. Relying on the structure of the worktable and the connecting plate mounted on the support frame through the connecting handle, rotating the connecting handle will drive the connecting plate to rotate through the adjusting block, and the connecting plate and the connecting shaft A will drive the worktable to rotate on the support frame, which facilitates the adjustment of the test angle. Meanwhile, the device is equipped with a connecting strip one and a first adjusting plate. Based on the fact that the support platform is installed on the connecting frame through the first adjusting plate and the connecting strip two, rotating the threaded rod can make the first adjusting plate slide left and right in the first connecting groove, and drive the support platform to rise and fall through the front and rear symmetrical connecting strip one and connecting strip two, thereby adjusting the distance between the support platform and the connecting frame, and thus adapting to the operating needs of different workers. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a schematic cross-sectional view of the connection between the second adjusting plate and the second connecting groove of the present invention on the right side. Figure 3 This is a top cross-sectional view of the connection between the workbench and the second connection port of the present invention. Figure 4 This is a top cross-sectional view of the connection between the first adjusting plate and the first connecting groove of the present invention. Figure 5 This is a schematic diagram of the overall structure of the first adjusting plate and the connecting strip of the present invention. Figure 6 This is a schematic diagram of the overall structure connecting the adjusting block and the connecting plate of the present invention; Figure 7 This is a schematic diagram of the overall structure connecting the first adjusting rod and the first limiting plate of the present invention; Figure 8 This is a schematic diagram of the overall structure of the connection between the second adjusting rod and the second limiting plate of the present invention.

[0017] In the diagram: 1-Workbench, 2-Calibrator, 3-Connecting cable, 4-Pneumatic valve, 5-Positioner, 6-First limiting component, 601-First connection port, 602-First adjusting rod, 603-First limiting plate, 604-First protective pad, 7-Second limiting component, 701-Second connection port, 702-Second adjusting rod, 703-Second limiting plate, 704-Second protective pad, 8-Connecting shaft A, 9-Support frame, 10-Connecting plate; 11-Adjusting block, 12-Connecting handle, 13-Connecting shaft B, 14-Motor a, 15-Bearing platform, 16-Connecting strip one, 17-Connecting strip two, 18-Mounting block, 19-Connecting frame, 20-Threaded rod, 21-Motor b, 22-First adjusting plate, 23-First connecting groove, 24-Second adjusting plate, 25-Guide rod, 26-Second connecting groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 This invention provides a technical solution: a linear accuracy calibration device for a pneumatic valve positioner, comprising a worktable 1, a calibrator 2, a connecting line 3, a pneumatic valve 4, a positioner 5, a first limiting component 6, a second limiting component 7, a connecting shaft A8, a support frame 9, a connecting plate 10, an adjusting block 11, a connecting handle 12, a connecting shaft B13, a motor a14, a bearing platform 15, a first connecting strip 16, a second connecting strip 17, a mounting block 18, a connecting frame 19, a threaded rod 20, a motor b21, a first adjusting plate 22, and a second adjusting plate 23. The worktable 1 includes a connecting groove 23, a second adjusting plate 24, a guide rod 25, and a second connecting groove 26. A worktable 1 is also included, with a calibrator 2 placed on its upper left side. A connecting wire 3 is inserted into the upper end of the calibrator 2, and the right end of the connecting wire 3 is inserted into the rear end of a pneumatic valve 4. The pneumatic valve 4 is placed on the upper right side of the worktable 1, and a positioner 5 is installed on the inner end of the pneumatic valve 4. An adjustable first limiting component 6 is provided on the right side of the worktable 1, and a movable second limiting component 7 is provided on the left side of the worktable 1. A connecting shaft A8 is fixedly connected to the middle position of the bottom end of the workbench 1, and the lower end of the connecting shaft A8 is rotatably connected to the middle position of the upper end of the support frame 9. The support frame 9 is embedded in the upper end of the bearing platform 15, and an adjustment block 11 is nested inside the rear end of the connecting plate 10. The lower left end of the support platform 15 is symmetrically connected to the connecting strip 16, and the right end of the connecting strip 16 is rotatably connected to the front and rear ends of the first adjusting plate 22, and the lower end of the first adjusting plate 22 is slidably connected to the inside of the first connecting groove 23.

[0020] The existing pneumatic valve and calibrator 2 are placed directly on the table. During calibration, even slight pulling can cause them to tip over, affecting work efficiency. Therefore, this embodiment addresses this issue with the following technical solution: Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 Since the first limiting component 6 includes a first connecting port 601, a first adjusting rod 602, a first limiting plate 603 and a first protective pad 604, the first limiting plate 603 forms a sliding structure on the upper side of the workbench 1 through the first adjusting rod 602 and the first connecting port 601; the second limiting component 7 includes a second connecting port 701, a second adjusting rod 702, a second limiting plate 703 and a second protective pad 704, the second limiting plate 703 forms a sliding structure on the upper side of the workbench 1 through the second adjusting rod 702 and the second connecting port 701. Therefore, the pneumatic valve 4 is placed on the upper right side of the workbench 1, with the lower end of the pneumatic valve 4 attached to the upper right side of the workbench 1. The first adjusting rod 602 is rotated to rotate inside the first connection port 601, so that the lower end of the first limiting plate 603, which is symmetrically arranged on the left and right, slides inward inside the first connection port 601. The first limiting plate 603, which is symmetrically arranged on the left and right, drives the first protective pad 604 at the corresponding position to move closer to each other until the inner ends of the two sets of first protective pads 604 are tightly pressed against the outer walls of the left and right ends of the pneumatic valve 4. Place the calibrator 2 on the upper left side of the workbench 1, with the lower end of the calibrator 2 attached to the upper left side of the workbench 1. Rotate the second adjusting rod 702 to make it rotate inside the second connection port 701, so that the lower end of the symmetrically arranged second limiting plates 703 slides inward inside the second connection port 701. This causes the symmetrically arranged second limiting plates 703 to bring the corresponding second protective pads 704 closer to each other until the inner ends of the two sets of second protective pads 704 are tightly pressed against the outer walls of the left and right ends of the calibrator 2, thereby facilitating the limiting of the pneumatic valve and the calibrator 2 and preventing the pneumatic valve and the calibrator 2 from falling over. Existing methods are inconvenient for staff to adjust the angle for testing when they are in different positions. Therefore, this embodiment addresses this issue by providing the following technical solution: Figure 1 , Figure 2 , Figure 4 and Figure 5Since the connecting strip 16 and the connecting strip 27 form an "X" shaped structure, the upper end of the second adjusting plate 24 is slidably connected to the inside of the second connecting groove 26, and the support platform 15 forms a lifting structure on the upper side of the connecting frame 19 through the first adjusting plate 22 and the connecting strip 27. Therefore, the height of the workbench 1 is adjusted according to the needs of the staff, so that when the motor b21 works, it drives the threaded rod 20 to rotate inside the connecting frame 19, and the lower end of the first adjusting plate 22 slides left and right inside the first connecting groove 23. Rotate the symmetrically arranged connecting strip 16 and connecting strip 17 to adjust the height of the connecting strip 16 and connecting strip 17, which are in an "X" shape. Let the second adjusting plate 24 slide left and right on the guide rod 25 and the second connecting groove 26 to adjust the distance between the support platform 15 and the connecting frame 19, so that the height can be easily adjusted to suit different workers. Currently, the height of the work surface is fixed while the height of the staff varies, making operation cumbersome and difficult to adjust to suit different staff members. Therefore, this embodiment addresses this issue by implementing the following technical solution: Figure 1 , Figure 2 and Figure 6 Since the rear end of the connecting plate 10 is nested with the adjustment block 11, the worktable 1 forms a rotating structure on the upper side of the support frame 9 through the connecting handle 12 and the connecting plate 10. The number of rotations of the connecting plate 10 is one-quarter of the number of rotations of the connecting handle 12. Therefore, the angle of the workbench 1 is adjusted according to the needs of the staff, so that the motor a14 drives the connecting shaft B13 to rotate at the left end of the support frame 9. When the connecting shaft B13 rotates, it drives the connecting handle 12 to rotate, which in turn drives the adjusting block 11 to rotate, so that the adjusting block 11 is nested inside the rear end of the connecting plate 10. The adjusting block 11 drives the connecting plate 10 to rotate 90°. When the connecting plate 10 rotates, it causes the connecting shaft A8 to rotate at the upper end of the support frame 9. Through the connecting plate 10 and the connecting shaft A8, the workbench 1 rotates on the upper side of the support frame 9, adjusting the angle of the calibrator 2 and the pneumatic valve 4, thus facilitating angle adjustment for testing. In use, place the calibrator 2 and the pneumatic valve 4 at the left and right ends of the workbench 1, respectively. Rotate the first adjusting rod 602 to slide the two sets of first limiting plates 603 inward inside the first connecting port 601 until the symmetrically arranged first protective pads 604 are attached to the lower outer wall of the pneumatic valve 4. Rotate the second adjusting rod 702 to slide the two sets of second limiting plates 703 inward inside the second connecting port 701 until the symmetrically arranged second protective pads 704 are attached to the lower outer wall of the calibrator 2. Insert the left end of the connecting wire 3 into the upper end of the calibrator 2, and the right end of the connecting wire 3 into the rear end of the pneumatic valve 4. When the motor b21 is working, the lower end of the first adjusting plate 22 slides inside the first connecting groove 23 through the threaded rod 20, allowing the two front and rear... The first connecting bar 16 and the second connecting bar 17 rotate to adjust their overall height, allowing the second adjusting plate 24 to slide left and right within the guide rod 25 and the second connecting groove 26, thus adjusting the distance between the support platform 15 and the connecting frame 19 and adjusting the height of the worktable 1. When the motor a14 is working, the connecting shaft B13 rotates on the support frame 9, driving the connecting plate 10 to rotate through the connecting handle 12 and the adjusting block 11, allowing the connecting shaft A8 to rotate at the upper end of the support frame 9, adjusting the angle of the worktable 1 for easy operation. During calibration, the operator operates on the calibrator 2. When calibration begins, the positioner 5 can be raised and lowered on the pneumatic valve 4 to calibrate the linear accuracy. All electrical components mentioned above are existing technologies and will not be described in detail here.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A linear accuracy calibration device for a pneumatic valve positioner, comprising a worktable (1), a connecting plate (10), and a first adjusting plate (22), wherein a calibrator (2) is placed on the upper left side of the worktable (1), and a pneumatic valve (4) is placed on the upper right side of the worktable (1); a connecting wire (3) is inserted into the upper end of the calibrator (2); the right end of the connecting wire (3) is inserted into the rear end of the pneumatic valve (4); a positioner (5) is installed on the inner end of the pneumatic valve (4), characterized in that, An adjustable first limiting component (6) is provided on the right side of the worktable (1), and a movable second limiting component (7) is provided on the left side of the worktable (1); a connecting shaft A (8) is fixedly connected to the middle position of the bottom end of the worktable (1); the lower end of the connecting shaft A (8) is rotatably connected to the middle position of the upper end of the support frame (9); the support frame (9) is embedded in the upper end of the bearing platform (15); an adjusting block (11) is nested inside the rear end of the connecting plate (10); a connecting strip (16) is symmetrically rotatably connected to the lower left end of the bearing platform (15), and the right end of the connecting strip (16) is rotatably connected to the front and rear ends of the first adjusting plate (22); the lower end of the first adjusting plate (22) is slidably connected to the inside of the first connecting groove (23).

2. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: The first limiting component (6) includes a first connecting port (601), a first adjusting rod (602), a first limiting plate (603), and a first protective pad (604). The first connecting port (601) is located inside the upper right end of the workbench (1), and the first adjusting rod (602) is rotatably connected inside the first connecting port (601). The first limiting plate (603) is symmetrically threaded onto the first adjusting rod (602). The first limiting plate (603) is slidably connected inside the first connecting port (601), and the first protective pad (604) is embedded in the upper inner end of the first limiting plate (603).

3. The linear accuracy calibration device for a pneumatic valve positioner according to claim 2, characterized in that: The outer surface of the first adjusting rod (602) is a bidirectional threaded structure; the first limiting plate (603) forms a sliding structure on the upper side of the workbench (1) through the first adjusting rod (602) and the first connecting port (601).

4. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: The second limiting component (7) includes a second connecting port (701), a second adjusting rod (702), a second limiting plate (703), and a second protective pad (704); the second connecting port (701) is opened inside the upper left end of the workbench (1), and the second adjusting rod (702) is rotatably connected inside the second connecting port (701); the second limiting plate (703) is threaded to both the left and right ends of the second adjusting rod (702); the lower end of the second limiting plate (703) is slidably connected inside the second connecting port (701), and the second protective pad (704) is embedded in the upper end of the inner part of the second limiting plate (703).

5. The linear accuracy calibration device for a pneumatic valve positioner according to claim 4, characterized in that: The second limiting plate (703) forms a sliding structure on the upper side of the workbench (1) through the second adjusting rod (702) and the second connecting port (701), and the threads at the left and right ends of the second adjusting rod (702) are opposite.

6. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: The adjusting block (11) is embedded in the upper right end of the connecting handle (12); the lower left end of the connecting handle (12) is fixedly connected to the connecting shaft B (13); the connecting shaft B (13) is rotatably connected to the upper left end of the support frame (9), and the lower end of the connecting shaft B (13) is equipped with a motor a (14).

7. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: The workbench (1) forms a rotating structure on the upper side of the support frame (9) via the connecting handle (12) and the connecting disc (10); the number of rotations of the connecting disc (10) is one-quarter of the number of rotations of the connecting handle (12).

8. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: The first connecting groove (23) is located at the bottom middle of the connecting frame (19); the inner wall of the left end of the connecting frame (19) is inlaid with a mounting block (18); the right end of the mounting block (18) is symmetrically connected to a second connecting strip (17); the upper end of the second connecting strip (17) is rotatably connected to the front and rear ends of the second adjusting plate (24), and the middle position of the second connecting strip (17) is rotatably connected to the first connecting strip (16); the first connecting strip (16) and the second connecting strip (17) form an "X" shaped structure.

9. A pneumatic valve positioner linear accuracy calibration device according to claim 8, characterized in that: A guide rod (25) is connected through the middle position of the second adjusting plate (24); the guide rod (25) is fixedly connected inside the second connecting groove (26), which is located inside the lower right end of the support platform (15); the upper end of the second adjusting plate (24) is slidably connected inside the second connecting groove (26).

10. The linear accuracy calibration device for a pneumatic valve positioner according to claim 1, characterized in that: A threaded rod (20) is threadedly connected to the middle position of the first adjusting plate (22); the threaded rod (20) is rotatably connected inside the connecting frame (19), and a motor b (21) is installed at the left end of the threaded rod (20); the support platform (15) forms a lifting structure on the upper side of the connecting frame (19) through the first adjusting plate (22) and the second connecting strip (17).

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