Valve positioning device convenient to adjust and install

Abstract

The utility model relates to the field of valve positioners, and discloses a valve positioning device convenient to adjust and install. The valve positioning device convenient to adjust and install comprises a valve positioning device body, the rear end of the valve positioning device body is fixedly connected with a rear connecting plate, the rear end of the rear connecting plate is slidably connected with a supporting rod, a sliding groove is formed in the supporting rod, the top of the supporting rod is in threaded connection with a fastening screw, and the top of the fastening screw is in threaded connection with the valve positioning device body. A fixing plate is fixedly connected to the other end, away from the rear connecting plate, of the supporting rod, a plurality of threaded holes are formed in the surface of the fixing plate, screws are in threaded connection with the interiors of the threaded holes, the fixing plate is in threaded connection with a valve deck through the screws, and an input shaft is rotationally connected to the rear end of the valve positioner body. According to the device, the distance between the positioner and the valve cover during installation can be adjusted, the output rod can be conveniently installed and adjusted, the position of the output rod can be quickly positioned and adjusted, the installation time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of valve positioners, and in particular relates to a valve positioning device that is easy to adjust and install. Background Art

[0002] The valve positioner can increase the output power of the control valve, reduce the transmission lag of the control signal, speed up the movement speed of the valve stem, improve the linearity of the valve, overcome the friction of the valve stem and eliminate the influence of unbalanced force, thereby ensuring the correct positioning of the control valve.

[0003] Before installing the valve positioner currently on the market, it is necessary to adjust the position of the valve stem and the positioner output shaft, and the rear end of the valve positioner needs to be fixed to the surface of the valve cover.

[0004] However, the space between the rear end of this type of valve positioner and the valve cover is small, and there is a lack of precise positioning devices, which makes the adjustment before installation time-consuming and labor-intensive, affecting work efficiency. Utility Model Content

[0005] The purpose of this application is to provide a valve positioning device that is easy to adjust and install in order to solve the problem that the space between the rear end of the valve positioner and the valve cover is small and there is a lack of accurate positioning device, which makes the adjustment before installation time-consuming and labor-intensive and affects work efficiency.

[0006] The technical solution adopted in the present application is as follows: a valve positioning device that is easy to adjust and install, comprising a valve positioner body, the rear end of the valve positioner body is fixedly connected to a rear connecting plate, the rear end of the rear connecting plate is slidably connected to a support rod, a sliding groove is provided inside the support rod, the top of the support rod is threadedly connected to a fastening screw, the other end of the support rod away from the rear connecting plate is fixedly connected to a fixing plate, the surface of the fixing plate is provided with a plurality of threaded holes, the internal threads of the threaded holes are connected to screws, the fixing plate is threadedly connected to a valve cover through the screws, the rear end of the valve positioner body is rotatably connected to an input shaft, the side end of the input shaft is fixed with a plug-in plate, the internal sliding connection of the plug-in plate is connected to an output rod, the other end of the output rod away from the plug-in plate is fixedly connected to a mounting ring, the internal thread of the mounting ring is connected to an adjusting screw, and the bottom end of the adjusting screw is rotatably connected to the adjusting plate.

[0007] By adopting the above technical solution, the rear connecting plate installed at the rear end of the valve positioner body is used to fix the slide rod and the valve positioner body. The slide rod can slide back and forth in the internal slide groove of the support rod to adjust the distance between the valve positioner body and the valve cover. The fastening screw can fix the position between the slide rod and the support rod. The upper surface of the slide rod is provided with a threaded groove for installing the fastening screw near the bottom of the fastening screw, which can be fixed by the fastening screw. The fixing plate at the rear end of the support rod is used to be fixedly installed with the front end surface of the valve cover. The valve positioner body is installed at the front end of the valve cover. When the input shaft at the rear end of the valve positioner body rotates, it can drive the plug-in plate to rotate. During installation, the fixing plate is first fixedly installed on the surface of the valve cover. The multiple threaded holes opened on the surface of the fixing plate can facilitate the positioning and installation of valve covers of different sizes, and are fixed by screws. Then the slide rod is stretched to the front end to open the distance between the valve positioner body and the valve cover, which is convenient for subsequent adjustment and installation. The internal valve stem of the valve cover can move up and down. The up and down movement of the valve stem represents the opening and closing of the valve. When the valve stem moves up and down, it will drive the adjustment plate to move up and down, and then drive the output rod in the adjustment plate to move up and down. The horizontal position of the valve stem is fixed to the horizontal position of the input shaft. When the top of the valve stem is inside the plug-in board, moving the valve stem up and down will make the valve stem slide inside the plug-in board and drive the plug-in board to rotate. The maximum rotation range should be adjusted carefully. The adjustment before installation can be made by turning the adjusting screw to drive the mounting ring to move up and down inside the adjusting plate, and then drive the output rod to adjust its up and down position. For example, when the valve is in the closed state, during installation, the adjusting screw can be turned to lower the position of the output rod, and the input shaft can be turned to the lowest position of the positioning scale line. Finally, the slide rod can be pushed to the rear end to allow the output rod to be plugged into the inside of the plug-in board. Note that the top of the output rod cannot contact the rear end of the valve positioner body. After the adjustment is completed, the installation can be completed by fixing the slide rod and the support rod with the tightening screw.

[0008] In a preferred embodiment, a mounting plate is fixedly connected to a side end of the adjustment plate, and a valve stem is fixedly mounted to a rear end of the mounting plate.

[0009] By adopting the above technical solution, the mounting plate can install the output rod and the adjusting device of the output rod on the surface of the valve stem, and utilize the up and down movement of the valve stem to drive the output rod to move, and utilize the output rod to drive the input shaft to rotate, thereby transmitting the signal between the valve and the positioner.

[0010] In a preferred embodiment, a valve stem is slidably connected to the interior of the valve cover, and a mounting hole is formed at the front end of the valve cover.

[0011] By adopting the above technical solution, the closing of the valve will drive the valve stem to move up and down, and the mounting hole can be conveniently installed at the rear end fixing plate of the valve positioner body.

[0012] In a preferred embodiment, a valve stem is slidably connected to the interior of the valve cover, and a mounting hole is formed at the front end of the valve cover.

[0013] By adopting the above technical solution, the input shaft can rotate to transmit the valve signal to the inside of the valve positioner body. The positioning scale lines opened at the rear end of the valve positioner body represent the maximum and minimum rotation angles of the input shaft when receiving the rotation signal. Corresponding to the opening and closing of the valve, the indicator mark can facilitate the installer to observe the initial position of the input shaft and facilitate positioning with the position of the valve stem.

[0014] In a preferred embodiment, a plug connector is fixedly connected to the top end of the input shaft, and a plug block is fixedly connected to the top end of the plug connector.

[0015] By adopting the above technical solution, when the top of the valve stem can be directly connected, the plug-in block at the top of the plug connector can be plugged into the groove at the top of the valve stem, so that installation and positioning can be performed in different installation situations.

[0016] In a preferred embodiment, a positioner front cover is fixedly mounted on the front end of the valve positioner body.

[0017] By adopting the above technical solution, the positioner front cover is connected to the valve positioner body by screws, which is convenient for installation and disassembly, and can be used for repairing and adjusting the internal device of the valve positioner body.

[0018] In a preferred embodiment, a display screen is fixedly installed at the front end of the valve positioner body and inside the front cover of the positioner, and a control button is fixedly installed at the front end of the valve positioner body and below the display screen.

[0019] By adopting the above technical solution, the display screen can display the positioner parameters, and the control buttons can be conveniently controlled and adjusted.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0021] In the present application, the rear connecting plate installed at the rear end of the valve positioner body is used to fix the slide rod and the valve positioner body. The slide rod can slide back and forth in the internal slide groove of the support rod to adjust the distance between the valve positioner body and the valve cover. The fastening screw can fix the position between the slide rod and the support rod. The upper surface of the slide rod is provided with a threaded groove for installing the fastening screw near the bottom of the fastening screw, which can be fixed by the fastening screw. The fixing plate at the rear end of the support rod is used to be fixedly installed with the front end surface of the valve cover. The valve positioner body is installed at the front end of the valve cover. When the input shaft at the rear end of the valve positioner body rotates, it can drive the plug-in plate to rotate. During installation, the fixing plate is first fixedly installed on the surface of the valve cover. The multiple threaded holes opened on the surface of the fixing plate can facilitate the positioning and installation of valve covers of different sizes, and are fixed by screws.

[0022] Then stretch the slide bar to the front end to increase the distance between the valve positioner body and the valve cover to facilitate subsequent adjustment and installation. The internal valve stem of the valve cover can move up and down. The up and down movement of the valve stem represents the opening and closing of the valve. When the valve stem moves up and down, it will drive the adjustment plate to move up and down, and then drive the output rod in the adjustment plate to move up and down. The horizontal position of the valve stem is fixed to the horizontal position of the input shaft. When the top of the valve stem is inside the plug-in board, moving the valve stem up and down will make the valve stem slide inside the plug-in board and drive the plug-in board to rotate. Pay attention to the maximum range of rotation. Adjustment before installation can be made by turning the adjusting screw to drive the mounting ring to move up and down inside the adjusting plate, thereby driving the output rod to adjust its up and down position.

[0023] For example, when the valve is in the closed state, during installation, the position of the output rod can be lowered by turning the adjusting screw, and the input shaft can be turned to the lowest position of the positioning scale line. Finally, the slide rod can be pushed to the rear end to allow the output rod to be inserted into the inside of the plug-in board. It should be noted that the top of the output rod cannot contact the rear end of the valve positioner body. After the adjustment is completed, the installation can be completed by fixing the slide rod and the support rod with the tightening screw. The input shaft can be rotated to transmit the valve signal to the inside of the valve positioner body. The positioning scale line opened at the rear end of the valve positioner body represents the maximum and minimum rotation angles of the input shaft when receiving the rotation signal. Corresponding to the opening and closing of the valve, the indicator mark can facilitate the installer to observe the initial position of the input shaft and facilitate positioning with the position of the valve stem. This device can adjust the distance between the positioner and the valve cover during installation, facilitate the installation and adjustment of the output rod, and can quickly locate and adjust the position of the output rod, saving installation time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a valve positioning device that is easy to adjust and install in this application;

[0025] Figure 2This is a schematic diagram of the internal structure of the valve cover in this application;

[0026] Figure 3 It is a plan view of the connection structure between the positioner and the valve cover in this application;

[0027] Figure 4 This is a front-end structural diagram of the valve positioner in this application.

[0028] Markings in the figure: 1. Valve positioner body; 2. Rear connecting plate; 3. Sliding rod; 4. Support rod; 5. Fastening screw; 6. Slide groove; 7. Fixing plate; 8. Threaded hole; 9. Positioning scale line; 10. Input shaft; 11. Indicator mark; 12. Plug-in plate; 13. Plug connector; 14. Plug-in block; 15. Screw; 16. Valve cover; 17. Mounting hole; 18. Valve stem; 19. Mounting plate; 20. Adjusting plate; 21. Adjusting screw; 22. Mounting ring; 23. Output rod; 24. Positioner front cover; 25. Display screen; 26. Control button. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Example:

[0031] Reference Figure 1-3A valve positioning device that is easy to adjust and install includes a valve positioner body 1, a rear end of the valve positioner body 1 is fixedly connected to a rear connecting plate 2, a rear end of the rear connecting plate 2 is slidably connected to a support rod 4, a slide groove 6 is provided inside the support rod 4, a fastening screw 5 is threadedly connected to the top of the support rod 4, the other end of the support rod 4 away from the rear connecting plate 2 is fixedly connected to a fixing plate 7, a surface of the fixing plate 7 is provided with a plurality of threaded holes 8, the internal threads of the threaded holes 8 are connected to screws 15, the fixing plate 7 is threadedly connected to a valve cover 16 through the screws 15, the rear end of the valve positioner body 1 is rotatably connected to an input shaft 10, a plug-in plate 12 is fixed to the side end of the input shaft 10, an output rod 23 is slidably connected to the inside of the plug-in plate 12, the other end of the output rod 23 away from the plug-in plate 12 is fixedly connected to a mounting ring 22, an adjusting screw 21 is threadedly connected to the internal thread of the mounting ring 22, and the bottom end of the adjusting screw 21 is rotatably connected to an adjusting plate 20. The rear connecting plate 2 installed at the rear end of the valve positioner body 1 is used to fix the sliding rod 3 and the valve positioner body 1. The sliding rod 3 can slide back and forth at the internal sliding groove 6 of the support rod 4 to adjust the distance between the valve positioner body 1 and the valve cover 16. The fastening screw 5 can fix the position between the sliding rod 3 and the support rod 4. A threaded groove for installing the fastening screw 5 is opened on the upper surface of the sliding rod 3 near the bottom of the fastening screw 5, and the fastening screw 5 can be used for fixing.

[0032] The fixing plate 7 at the rear end of the support rod 4 is used to be fixedly installed with the front end surface of the valve cover 16. The valve positioner body 1 is installed at the front end of the valve cover 16. When the input shaft 10 at the rear end of the valve positioner body 1 rotates, it can drive the plug-in plate 12 to rotate. During installation, the fixing plate 7 is first fixedly installed on the surface of the valve cover 16. The multiple threaded holes 8 opened on the surface of the fixing plate 7 can facilitate the positioning and installation of valve covers 16 of different sizes, and are fixed with screws 15. Then, the slide bar 3 is stretched to the front end to increase the distance between the valve positioner body 1 and the valve cover 16, which is convenient for subsequent adjustment and installation. The internal valve stem 18 of the valve cover 16 can move up and down. The up and down movement of the valve stem 18 represents the opening and closing of the valve. When the valve stem 18 moves up and down, it will drive the adjustment plate 20 to move up and down, and then drive the output rod 23 in the adjustment plate 20 to move up and down. The horizontal position of the valve stem 18 is fixed to the horizontal position of the input shaft 10. When the top of the valve stem 18 is inside the plug-in board 12, moving the valve stem 18 up and down will make the valve stem 18 slide inside the plug-in board 12 and drive the plug-in board 12 to rotate. The maximum rotation range should be adjusted. The adjustment before installation can be made by rotating the adjusting screw 21 to drive the mounting ring 22 to move up and down inside the adjusting plate 20, and then drive the output rod 23 to adjust its up and down position. For example, when the valve is in a closed state, during installation, the adjusting screw 21 can be turned to lower the position of the output rod 23, and the input shaft 10 can be turned to the lowest position of the positioning scale line 9, and finally the slide bar 3 is pushed to the rear end to allow the output rod 23 to be inserted into the inside of the plug-in board 12. It should be noted that the top of the output rod 23 cannot contact the rear end of the valve positioner body 1. After the adjustment is completed, the slide bar 3 and the support rod 4 can be fixed with the tightening screw 5 to complete the installation.

[0033] Reference Figure 2 and Figure 3 The side end of the adjusting plate 20 is fixedly connected with the mounting plate 19, and the rear end of the mounting plate 19 is fixedly mounted with the valve stem 18. The mounting plate 19 can mount the output rod 23 and the adjusting device of the output rod 23 on the surface of the valve stem 18, and the output rod 23 is driven to move by the up and down movement of the valve stem 18, and the input shaft 10 is driven to rotate by the output rod 23, so as to transmit the signal between the valve and the positioner.

[0034] Reference Figure 2 The valve stem 18 is slidably connected to the inside of the valve cover 16, and a mounting hole 17 is provided at the front end of the valve cover 16. The closing of the valve will drive the valve stem 18 to move up and down, and the mounting hole 17 can be conveniently installed at the rear end fixing plate 7 of the valve positioner body 1.

[0035] Reference Figure 1The rear end of the valve positioner body 1 and the side end of the input shaft 10 are provided with a positioning scale line 9, and the surface of the input shaft 10 and the indicator mark 11 are fixedly installed near the rear end of the valve positioner body 1. The input shaft 10 can be rotated to transmit the valve signal to the inside of the valve positioner body 1. The positioning scale line 9 provided at the rear end of the valve positioner body 1 represents the maximum and minimum rotation angles of the input shaft 10 when receiving the rotation signal. Corresponding to the opening and closing of the valve, the indicator mark 11 can facilitate the installer to observe the initial position of the input shaft 10 and facilitate positioning with the position of the valve stem 18.

[0036] Reference Figure 1 The top of the input shaft 10 is fixedly connected with a plug connector 13, and the top of the plug connector 13 is fixedly connected with a plug block 14. When the top of the valve stem can be directly connected, the plug block 14 at the top of the plug connector 13 can be inserted into the groove at the top of the valve stem. Installation and positioning can be performed in different installation situations.

[0037] Reference Figure 4 The front end of the valve positioner body 1 is fixedly mounted with a positioner front cover 24. The positioner front cover 24 is connected to the valve positioner body 1 by screws, which is convenient for installation and disassembly, and can be used to inspect and adjust the internal device of the valve positioner body 1.

[0038] Reference Figure 4 A display screen 25 is fixedly installed at the front end of the valve positioner body 1 and inside the positioner front cover 24, and a control button 26 is fixedly installed at the front end of the valve positioner body 1 and below the display screen 25. The display screen 25 can display the positioner parameters, and the control button 26 can be easily controlled and adjusted.

[0039] The implementation principle of the embodiment of the valve positioning device of the present application that is easy to adjust and install is as follows: the rear connecting plate 2 installed at the rear end of the valve positioner body 1 is used to fix the slide bar 3 and the valve positioner body 1, the slide bar 3 can slide back and forth at the internal slide groove 6 of the support rod 4 to adjust the distance between the valve positioner body 1 and the valve cover 16, the fastening screw 5 can fix the position between the slide bar 3 and the support rod 4, and the upper surface of the slide bar 3 is provided with a thread groove for installing the fastening screw 5 near the bottom of the fastening screw 5, which can be fixed by the fastening screw 5. The fixing plate 7 at the rear end of the support rod 4 is used to be fixedly installed with the front end surface of the valve cover 16. The valve positioner body 1 is installed at the front end of the valve cover 16. When the input shaft 10 at the rear end of the valve positioner body 1 rotates, it can drive the plug-in plate 12 to rotate. During installation, the fixing plate 7 is first fixedly installed on the surface of the valve cover 16, and the valve covers 16 of different sizes can be conveniently positioned and installed through the multiple threaded holes 8 opened on the surface of the fixing plate 7, and fixed by screws 15.

[0040] Then stretch the slide bar 3 to the front end to increase the distance between the valve positioner body 1 and the valve cover 16, so as to facilitate subsequent adjustment and installation. The internal valve stem 18 of the valve cover 16 can move up and down. The up and down movement of the valve stem 18 represents the opening and closing of the valve. When the valve stem 18 moves up and down, it will drive the adjustment plate 20 to move up and down, and then drive the output rod 23 in the adjustment plate 20 to move up and down. The horizontal position of the valve stem 18 is fixed to the horizontal position of the input shaft 10. When the top of the valve stem 18 is inside the plug-in board 12, moving the valve stem 18 up and down will make the valve stem 18 slide inside the plug-in board 12 and drive the plug-in board 12 to rotate. The maximum rotation range should be adjusted carefully. The adjustment before installation can be made by rotating the adjusting screw 21 to drive the mounting ring 22 to move up and down inside the adjusting plate 20, and then drive the output rod 23 to adjust its up and down position. For example, when the valve is in a closed state, during installation, the adjusting screw 21 can be rotated to lower the position of the output rod 23, and the input shaft 10 can be rotated to the lowest position of the positioning scale line 9, and finally the slide bar 3 is pushed to the rear end to allow the output rod 23 to be plugged into the inside of the plug-in board 12. It should be noted that the top of the output rod 23 cannot contact the rear end of the valve positioner body 1. After the adjustment is completed, the installation can be completed by fixing the slide bar 3 and the support rod 4 with the tightening screw 5. The input shaft 10 can be rotated to transmit the valve signal to the inside of the valve positioner body 1. The positioning scale line 9 opened at the rear end of the valve positioner body 1 represents the maximum and minimum rotation angles of the input shaft 10 when receiving the rotation signal. Corresponding to the opening and closing of the valve, the indicator 11 can facilitate the installation personnel to observe the initial position of the input shaft 10 and facilitate the positioning with the position of the valve stem 18. The device can adjust the distance between the positioner and the valve cover during installation, facilitate the installation and adjustment of the output rod, and can quickly locate and adjust the position of the output rod, saving installation time and improving work efficiency.

[0041] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A valve positioning device that is easy to adjust and install, comprising a valve positioner body (1), characterized in that: The rear end of the valve positioner body (1) is fixedly connected to a rear connecting plate (2), and the rear end of the rear connecting plate (2) is slidably connected to a support rod (4), a slide groove (6) is provided inside the support rod (4), a fastening screw (5) is threadedly connected to the top of the support rod (4), and the other end of the support rod (4) away from the rear connecting plate (2) is fixedly connected to a fixing plate (7), a surface of the fixing plate (7) is provided with a plurality of threaded holes (8), and the inner parts of the threaded holes (8) are threadedly connected to screws (15), and the fixing plate (7) is fixedly connected to the fixing plate (7). ) is threadedly connected to a valve cover (16) via a screw (15); the rear end of the valve positioner body (1) is rotatably connected to an input shaft (10); the side end of the input shaft (10) is fixed to a plug-in plate (12); the inside of the plug-in plate (12) is slidably connected to an output rod (23); the other end of the output rod (23) away from the plug-in plate (12) is fixedly connected to a mounting ring (22); the internal thread of the mounting ring (22) is connected to an adjusting screw (21); the bottom end of the adjusting screw (21) is rotatably connected to an adjusting plate (20).

2. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: The side end of the adjustment plate (20) is fixedly connected to a mounting plate (19), and the rear end of the mounting plate (19) is fixedly mounted with a valve stem (18).

3. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: A valve stem (18) is slidably connected inside the valve cover (16), and a mounting hole (17) is provided at the front end of the valve cover (16).

4. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: A positioning scale line (9) is provided at the rear end of the valve positioner body (1) and at the side end of the input shaft (10), and an indicator mark (11) is fixedly installed on the surface of the input shaft (10) and close to the rear end of the valve positioner body (1).

5. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: The top end of the input shaft (10) is fixedly connected to a plug connector (13), and the top end of the plug connector (13) is fixedly connected to a plug block (14).

6. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: A positioner front cover (24) is fixedly mounted on the front end of the valve positioner body (1).

7. A valve positioning device that is easy to adjust and install as claimed in claim 1, characterized in that: A display screen (25) is fixedly installed at the front end of the valve positioner body (1) and located inside the positioner front cover (24), and a control button (26) is fixedly installed at the front end of the valve positioner body (1) and located below the display screen (25).

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