Oblique shifting fork structure actuator suitable for butterfly valve

Abstract

The utility model relates to the technical field of butterfly valve inclined shifting fork actuators, in particular to an inclined shifting fork structure actuator suitable for a butterfly valve, which comprises a valve body, a base used for supporting is assembled on the surface of the top end of the valve body through bolts, and a valve rod in transmission connection with a valve plate is rotatably mounted on the surface of the top end of the valve body. When the inclined shifting fork actuator used for the butterfly valve is used, the pulling and inserting arm on the inner side of the base swings to conveniently drive the valve rod to rotate, opening of a valve plate on the inner side of the butterfly valve is conveniently controlled, and meanwhile the pulling and inserting arm conveniently drives the threaded shaft and the base plate to move along with movement of the pulling and inserting arm. Meanwhile, guide wheels at the bottom of the chassis can conveniently slide and displace in sliding grooves in the bottom surface of the inner side of the base and can assist in supporting movement of the pulling and inserting arm, so that the pulling and inserting arm can swing and displace more stably, and the stability of the pulling and inserting arm during operation is conveniently improved; and the inclined shifting fork actuator can control the operation of the butterfly valve more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve oblique shift fork actuators, in particular to an oblique shift fork structure actuator suitable for butterfly valves. Background Art

[0002] The scotch fork pneumatic actuator with high versatility drives the scotch fork to rotate through the linear motion of the piston rod, thereby driving the main shaft or valve stem to rotate. It is suitable for the switch, cutoff or metering control of valves with a 90° rotation angle (such as ball valves, butterfly valves, and plug valves). The scotch fork pneumatic actuator with high versatility generally has two design structures according to the torque characteristics and usage requirements of each valve. One is the symmetrical scotch fork design and the other is the inclined scotch fork design. The characteristic of the symmetrical scotch fork design is that the length direction of the fixed slider hole on the scotch fork is arranged along the central axis of the scotch fork, so that the torque output curve is symmetrical from opening to closing, and the torque at both ends is consistent. This design feature is suitable for ball valve drives. The characteristic of the inclined fork design is that the length direction of the fixed slider hole on the fork forms an inclination angle with the central axis of the fork, which can change the actuator torque output curve as required to adjust the torque when opening or closing the valve. This design is particularly suitable for driving butterfly valves and eccentric rotary valves; Patent No. CN202122128726.1 publishes a highly versatile fork-type pneumatic actuator, which optimizes the transmission friction coefficient between the fork and the slider, with high transmission efficiency, slow wear and high durability; however, since the plug-in arm is prone to some shaking when swinging, long-term shaking movement is likely to cause some unnecessary wear on the plug-in arm. At the same time, large wear will also affect the accuracy of the plug-in arm and affect its use. To this end, we propose an inclined fork structure actuator suitable for butterfly valves. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides an actuator with an oblique shift fork structure suitable for a butterfly valve.

[0004] The technical solution adopted by the utility model to solve its technical problems is an oblique fork structure actuator suitable for butterfly valves, including a valve body, the top surface of the valve body is equipped with a base for support through bolts, and a valve stem that is transmission-connected to the valve plate is rotatably installed on the top surface of the valve body, and the valve stem is located on the inner side of the base, and the outer periphery of the valve stem is sleeved with a plug-in arm located on the inner side of the base, and the top surface of the plug-in arm is provided with a circular hole for connection, and there are two groups of circular holes, a threaded barrel for connection is inserted into the inner side of the circular hole, and the bottom end of the threaded barrel located on the bottom side of the plug-in arm is integrally constructed with a pad for limiting, and a rotating seat located on the top surface of the threaded barrel is screwed and installed;

[0005] A threaded shaft for adjustment is threadedly installed on the inner side of the threaded cylinder, and a chassis for support is integrally constructed on the bottom surface of the threaded shaft. A sliding groove for limiting is provided on the inner bottom surface of the base, and a guide wheel slidably connected to the sliding groove is rotatably installed on the bottom surface of the chassis. A spring located on the outer periphery of the threaded shaft is assembled between the chassis and the pad.

[0006] By adopting the above technical solution, when the oblique shift fork actuator used for the butterfly valve is used, the plug-in and pull-out arm on the inner side of the base swings to conveniently drive the valve stem to rotate, so as to facilitate the control of the opening of the valve plate inside the butterfly valve. At the same time, the plug-in and pull-out arm conveniently drives the threaded shaft and the chassis to move along with the movement of the plug-in and pull-out arm. At the same time, the guide wheel at the bottom of the chassis conveniently slides and displaces in the slide groove on the inner bottom surface of the base, and can provide auxiliary support for the movement of the plug-in and pull-out arm, so that the plug-in and pull-out arm can swing and displace more stably, which is convenient for improving the stability of the plug-in and pull-out arm during operation, and can enable the oblique shift fork actuator to more stably control the operation of the butterfly valve;

[0007] When the plug-in arm is in use, the threaded barrel conveniently drives the pad and the circular hole on the surface of the plug-in arm to be plugged into each other. At the same time, the swivel seat can be screwed together with the threaded barrel to fix the threaded barrel on the outer periphery of the plug-in arm. Then, the threaded shaft is conveniently screwed together with the threads on the inner periphery of the threaded barrel, and the guide wheel at the bottom of the threaded shaft can provide auxiliary support for the plug-in arm. At the same time, the threaded shaft can be screwed and displaced in the threaded barrel, which is convenient for adjustment according to the distance between the plug-in arm and the base. At the same time, the spring between the pad and the chassis is convenient for auxiliary support, so that the threaded barrel screwed with the threaded shaft can be more stably connected to the plug-in arm and support it, so that the plug-in arm can operate more stably in the future.

[0008] Specifically, an inclined sliding hole for adjustment is provided on the surface of the plug-in arm, and a guide rail for connection is assembled on the inner bottom end surface of the base through bolts, and there are two groups of guide rails, and a sliding seat for adjustment is slidably installed between the two groups of guide rails, and a bearing slidably connected to the inclined sliding hole is rotatably installed on the top surface of the sliding seat, and a plug-in rod connected to the sliding seat is slidably installed on the side wall surface of the outer circumference of the base.

[0009] By adopting the above technical scheme, the two sets of guide rails on the surface of the slide seat and the base are slidably connected to each other, which is convenient for improving the stability of the slide seat during sliding displacement, and at the same time, the rotatably installed bearing on the surface of the slide seat is convenient for mutual sliding connection with the inclined sliding hole on the surface of the plug-in arm, and at the same time, the plug-in rod is convenient for driving the slide seat to move, and the slide seat is convenient for driving the bearing and the inclined sliding hole to slide with each other, so that the plug-in arm can swing, thereby forming an oblique fork structure, and driving the valve stem at the top of the butterfly valve to rotate, which is convenient for controlling the opening and closing of the butterfly valve, and the plug-in rod located on the outside of the base is convenient for mutual connection with the power structure, and then the oblique fork structure can operate stably.

[0010] Specifically, the top surface of the base and the outer circumferential side wall surface are both assembled with a cover plate for maintenance by bolts.

[0011] By adopting the above technical solution, the cover plate is easy to disassemble and assemble, and the maintenance of the structure inside the base is convenient.

[0012] Specifically, a straight groove for rotation is formed on the top surface of the threaded shaft.

[0013] By adopting the above technical solution, the straight groove makes it easier for the threaded shaft to rotate.

[0014] Specifically, the outer circumferential surface of the threaded barrel is provided with arc grooves for connection, and there are multiple groups of arc grooves. The inner circumferential surface of the circular hole is integrally constructed with arc blocks that fit and connect with the arc grooves, and there are multiple groups of arc blocks.

[0015] By adopting the above technical solution, the arc block and the arc groove are fitted and connected with each other, so that after the threaded barrel and the round hole are plugged into each other, there will be no self-rotation between the threaded barrel and the round hole, so that the threaded barrel can be stably threadedly connected with the threaded shaft and support it.

[0016] Specifically, a screw for tightening is threadedly installed on the outer peripheral surface of the threaded barrel.

[0017] By adopting the above technical solution, the screw is threadedly installed on the outer periphery of the threaded barrel and is convenient for disassembly and assembly, which facilitates the auxiliary limiting of the threaded shaft threadedly installed on the inner side of the threaded barrel, so that it can operate more stably.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The technical solution of the present application is designed through the base, valve stem, plug-in arm, round hole, chassis, guide wheel, slide groove and threaded shaft. When the oblique fork actuator used for the butterfly valve is used, the plug-in arm on the inner side of the base swings to drive the valve stem to rotate, which is convenient for controlling the opening of the valve plate inside the butterfly valve. At the same time, the plug-in arm drives the threaded shaft and the chassis to move with the movement of the plug-in arm. At the same time, the guide wheel at the bottom of the chassis is convenient for sliding displacement in the slide groove on the inner bottom surface of the base, and can provide auxiliary support for the movement of the plug-in arm, so that the plug-in arm can swing and displace more stably, which is convenient for improving the stability of the plug-in arm during operation, and can enable the oblique fork actuator to more stably control the operation of the butterfly valve.

[0020] 2. The design of the circular hole, threaded barrel, pad, rotary seat and spring in the technical solution of the present application is that when the plug-in arm is in use, the threaded barrel can conveniently drive the pad to be plugged into the circular hole on the surface of the plug-in arm, and at the same time, the rotary seat can be screwed together with the threaded barrel and fix the threaded barrel to the outer periphery of the plug-in arm, and then the threaded shaft is conveniently screwed together with the threads on the inner periphery of the threaded barrel, and the guide wheel at the bottom of the threaded shaft can provide auxiliary support for the plug-in arm, and at the same time, the threaded shaft can be screwed and displaced in the threaded barrel, which is convenient for adjustment according to the distance between the plug-in arm and the base, and at the same time, the spring between the pad and the base is convenient for auxiliary support, so that the threaded barrel screwed together with the threaded shaft can be more stably connected to the plug-in arm and support it, so that the plug-in arm can operate more stably in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is an axonometric drawing of the utility model;

[0023] Figure 2 This is a top view of the inner structure of the base of the utility model;

[0024] Figure 3 It is a schematic diagram of the connection structure between the guide wheel and the rotating seat of the utility model;

[0025] In the figure: 1. valve body; 2. base; 3. valve stem; 4. plug-in arm; 5. round hole; 6. slide groove; 7. threaded cylinder; 8. pad; 9. swivel seat; 10. threaded shaft; 11. chassis; 12. guide wheel; 13. spring; 14. arc groove; 15. arc block; 16. straight groove; 17. screw; 18. guide rail; 19. slide seat; 20. inclined slide hole; 21. bearing; 22. plug-in rod; 23. cover plate. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] See also Figure 1-3The utility model embodiment provides a technical solution: an oblique fork structure actuator suitable for a butterfly valve, comprising a valve body 1, a base 2 for support is assembled on the top surface of the valve body 1 through bolts, and a valve stem 3 connected to the valve plate is rotatably mounted on the top surface of the valve body 1, and the valve stem 3 is located on the inner side of the base 2, and a plug-in arm 4 located on the inner side of the base 2 is sleeved on the outer periphery of the valve stem 3, and a circular hole 5 for connection is opened on the top surface of the plug-in arm 4, and there are two groups of circular holes 5, and a threaded barrel 7 for connection is inserted into the inner side of the circular hole 5, and the threaded barrel A pad 8 for limiting is integrally constructed at the bottom end of the bottom side of the plug-in and pull-out arm 4, and a rotary seat 9 located at the top of the plug-in and pull-out arm 4 is screwed on the top surface of the threaded tube 7; a threaded shaft 10 for adjustment is screwed on the inner side of the threaded tube 7, and a chassis 11 for support is integrally constructed on the bottom surface of the threaded shaft 10, a slide groove 6 for limiting is opened on the inner bottom surface of the base 2, and a guide wheel 12 slidably connected to the slide groove 6 is rotatably installed on the bottom surface of the chassis 11, and a spring 13 located on the outer periphery of the threaded shaft 10 is assembled between the chassis 11 and the pad 8.

[0028] When in use, when the oblique fork actuator used for the butterfly valve is used, the plug-in arm 4 on the inner side of the base 2 swings to conveniently drive the valve stem 3 to rotate, so as to facilitate the control of the opening of the valve plate inside the butterfly valve. At the same time, the plug-in arm 4 conveniently drives the threaded shaft 10 and the chassis 11 to move with the movement of the plug-in arm 4. At the same time, the guide wheel 12 at the bottom of the chassis 11 is convenient for sliding displacement in the slide groove 6 on the inner bottom surface of the base 2, and can provide auxiliary support for the movement of the plug-in arm 4, so that the plug-in arm 4 can swing and displace more stably, which is convenient for improving the stability of the plug-in arm 4 during operation, and can enable the oblique fork actuator to more stably control the operation of the butterfly valve;

[0029] When the plug-in arm 4 is in use, the threaded barrel 7 conveniently drives the pad 8 to be plugged into the circular hole 5 on the surface of the plug-in arm 4. At the same time, the rotary seat 9 can be screwed together with the threaded barrel 7 and fix the threaded barrel 7 on the outer periphery of the plug-in arm 4. Then the threaded shaft 10 is conveniently screwed together with the threads on the inner periphery of the threaded barrel 7, and the guide wheel 12 at the bottom of the threaded shaft 10 can provide auxiliary support for the plug-in arm 4. At the same time, the threaded shaft 10 can be screwed and displaced in the threaded barrel 7, which is convenient for adjusting according to the distance between the plug-in arm 4 and the base 2. At the same time, the spring 13 between the pad 8 and the chassis 11 is convenient for auxiliary support, so that the threaded barrel 7 screwed together with the threaded shaft 10 can be more stably connected to the plug-in arm 4 and support it, so that the plug-in arm 4 can operate more stably in the future.

[0030] like Figure 1 and Figure 2As shown, an inclined sliding hole 20 for adjustment is provided on the surface of the plug-in arm 4, and a guide rail 18 for connection is assembled on the inner bottom end surface of the base 2 by bolts, and there are two groups of guide rails 18, and a slide seat 19 for adjustment is slidably installed between the two groups of guide rails 18, and a bearing 21 slidably connected to the inclined sliding hole 20 is rotatably installed on the top surface of the slide seat 19, and a plug-in rod 22 connected to the slide seat 19 is slidably installed on the outer side wall surface of the base 2.

[0031] When in use, the slide 19 and the two sets of guide rails 18 on the surface of the base 2 are slidably connected to each other, which is convenient for improving the stability of the slide 19 during sliding displacement. At the same time, the rotatably installed bearing 21 on the surface of the slide 19 is convenient for sliding connection with the inclined sliding hole 20 on the surface of the plug-in arm 4. At the same time, the plug-in rod 22 is convenient for driving the slide 19 to move, and the slide 19 is convenient for driving the bearing 21 and the inclined sliding hole 20 to slide with each other, so that the plug-in arm 4 can swing, thereby forming an oblique fork structure, and driving the valve stem 3 at the top of the butterfly valve to rotate, which is convenient for controlling the opening and closing of the butterfly valve, and the plug-in rod 22 located on the outside of the base 2 is convenient for mutual connection with the power structure, and then the oblique fork structure can operate stably.

[0032] like Figure 1 and Figure 2 As shown, the top surface and the outer peripheral side wall surface of the base 2 are both assembled with a cover plate 23 for maintenance by bolts.

[0033] When in use, the cover plate 23 is easy to disassemble and assemble, so as to facilitate maintenance of the structure inside the base 2 .

[0034] like Figure 3 As shown, a straight groove 16 for rotation is provided on the top surface of the threaded shaft 10 .

[0035] When in use, the I-shaped groove 16 makes it easier for the threaded shaft 10 to rotate.

[0036] like Figure 2 and Figure 3 As shown, the outer circumferential surface of the threaded barrel 7 is provided with arc grooves 14 for connection, and there are multiple groups of arc grooves 14. The inner circumferential surface of the circular hole 5 is integrally constructed with arc blocks 15 that fit and connect with the arc grooves 14, and there are multiple groups of arc blocks 15.

[0037] When in use, the arc block 15 and the arc groove 14 are fitted together, so that after the threaded barrel 7 and the round hole 5 are plugged into each other, the threaded barrel 7 and the round hole 5 will not rotate, so that the threaded barrel 7 can be stably threadedly connected with the threaded shaft 10 and support it.

[0038] like Figure 3 As shown, a screw 17 for tightening is threadedly installed on the outer peripheral surface of the threaded cylinder 7.

[0039] When in use, the screw 17 is threadedly installed on the outer periphery of the threaded barrel 7 and is convenient for disassembly and assembly, so as to assist in limiting the threaded shaft 10 threadedly installed on the inner side of the threaded barrel 7, so that it can operate more stably.

[0040] The working principle and use process of the utility model are as follows: when in use, first install the corresponding structural components in the appropriate position. When the oblique fork actuator used for the butterfly valve is used, the plug-in arm 4 on the inner side of the base 2 swings to drive the valve stem 3 to rotate, which is convenient for controlling the opening of the valve plate inside the butterfly valve. At the same time, the plug-in arm 4 drives the threaded shaft 10 and the chassis 11 to move with the movement of the plug-in arm 4. At the same time, the guide wheel 12 at the bottom of the chassis 11 is convenient for sliding displacement in the slide groove 6 on the inner bottom surface of the base 2, and can provide auxiliary support for the movement of the plug-in arm 4, so that the plug-in arm 4 can swing and displace more stably, which is convenient for improving the stability of the plug-in arm 4 during operation, and can make the oblique fork actuator more stably control the operation of the butterfly valve. At the same time, when the plug-in arm 4 is inserted Before use, the threaded barrel 7 facilitates the insertion and connection between the pad 8 and the circular hole 5 on the surface of the plug-in arm 4. At the same time, the rotary seat 9 can be screwed together with the threaded barrel 7 and fix the threaded barrel 7 on the outer periphery of the plug-in arm 4. Then, the threaded shaft 10 is conveniently screwed together with the threads on the inner periphery of the threaded barrel 7, and the guide wheel 12 at the bottom of the threaded shaft 10 can provide auxiliary support for the plug-in arm 4. At the same time, the threaded shaft 10 can be screwed and displaced in the threaded barrel 7, which is convenient for adjustment according to the distance between the plug-in arm 4 and the base 2. At the same time, the spring 13 between the pad 8 and the chassis 11 facilitates auxiliary support, so that the threaded barrel 7 screwed together with the threaded shaft 10 can be more stably connected to the plug-in arm 4 and support it, so that the plug-in arm 4 can operate more stably in the future.

[0041] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. An actuator with a shift fork structure suitable for a butterfly valve, characterized in that: The valve body (1) comprises a valve body (1), the top surface of the valve body (1) is equipped with a base (2) for support by bolts, and a valve stem (3) drivingly connected to a valve plate is rotatably mounted on the top surface of the valve body (1), and the valve stem (3) is located inside the base (2), and a plug-in arm (4) located inside the base (2) is sleeved and mounted on the outer periphery of the valve stem (3), and a circular hole (5) for connection is opened on the top surface of the plug-in arm (4), and there are two groups of circular holes (5), and a threaded barrel (7) for connection is inserted inside the circular hole (5), and a pad (8) for limiting is integrally constructed at the bottom end of the threaded barrel (7) located at the bottom side of the plug-in arm (4), and a rotary seat (9) located at the top of the plug-in arm (4) is screwed and mounted on the top surface of the threaded barrel (7); A threaded shaft (10) for adjustment is screwed on the inner side of the threaded cylinder (7), and a chassis (11) for support is integrally constructed on the bottom surface of the threaded shaft (10). A slide groove (6) for limiting is provided on the inner bottom surface of the base (2), and a guide wheel (12) slidably connected to the slide groove (6) is rotatably installed on the bottom surface of the chassis (11). A spring (13) located on the outer periphery of the threaded shaft (10) is installed between the chassis (11) and the pad (8).

2. The actuator of the oblique shift fork structure suitable for a butterfly valve according to claim 1, characterized in that: The surface of the plug-in / pull-out arm (4) is provided with an inclined sliding hole (20) for adjustment, and the inner bottom end surface of the base (2) is equipped with a guide rail (18) for connection through bolts, and there are two groups of guide rails (18), and a sliding seat (19) for adjustment is slidably installed between the two groups of guide rails (18), and a bearing (21) slidably connected to the inclined sliding hole (20) is rotatably installed on the top surface of the sliding seat (19), and a plug-in / pull-out rod (22) connected to the sliding seat (19) is slidably installed on the outer peripheral side wall surface of the base (2).

3. The oblique shift fork structure actuator suitable for a butterfly valve according to claim 1, characterized in that: The top surface of the base (2) and the outer peripheral side wall surface are both assembled with a cover plate (23) for maintenance by means of bolts.

4. The oblique shift fork structure actuator suitable for a butterfly valve according to claim 1, characterized in that: The top surface of the threaded shaft (10) is provided with a straight groove (16) for rotation.

5. The oblique shift fork structure actuator suitable for a butterfly valve according to claim 1, characterized in that: The outer circumferential surface of the threaded barrel (7) is provided with an arc groove (14) for connection, and there are multiple groups of arc grooves (14); the inner circumferential surface of the circular hole (5) is integrally constructed with an arc block (15) that fits and connects with the arc groove (14), and there are multiple groups of arc blocks (15).

6. The oblique shift fork structure actuator suitable for a butterfly valve according to claim 1, characterized in that: The outer peripheral surface of the threaded barrel (7) is threadedly mounted with a screw (17) for tightening.

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