Valve actuator

Abstract

The application discloses a valve actuator and relates to the technical field of valve switch control equipment.The valve actuator comprises a rack, a fixing plate, a mounting plate and a rotating shaft, one side surface of the fixing plate is provided with a lifting cam, the lifting cam is provided with a first through hole for the rotating shaft to pass through, and the outer circumferential surface of the lifting cam is provided with a stroke groove; a start-stop control assembly comprises a rotating disc, a pressing shaft and a bottom plate, the rotating disc is rotatably installed on the mounting plate, one end of the rotating shaft is rotatably installed on the fixing plate, the other end of the rotating shaft is connected to the rotating disc, the pressing shaft is movably inserted into the rotating disc, one end of the pressing shaft is movably installed in the stroke groove, the other end of the pressing shaft is connected to the bottom plate, and one side surface of the bottom plate is provided with a clamping jaw. The valve actuator is installed on a valve and can be actively separated from the handle of the valve, so that an operator can conveniently manually operate the valve.

Description

Technical Field

[0001] This invention relates to the field of valve switching control equipment technology, and in particular to a valve actuator. Background Technology

[0002] In the prior art, ball valves (hereinafter referred to as valve 100), such as Figure 4 As shown, the handle 101 of the horizontal rotary valve 100 is used to control the opening and closing of the valve 100. The angle at which the operator rotates the handle 101 generally does not exceed 90 degrees. The handle 101 consists of a main frame 102 and spoke portions 103 in the central area, with structural gaps 104 between adjacent spoke portions 103. In the prior art, the valve actuator is installed on the handle to control the forward and reverse rotation of the handle to achieve automatic opening and closing of the valve. However, after the valve actuator is installed, the handle is covered, making it impossible to manually operate the handle in special situations or emergencies such as mechanism jamming. It is necessary to disassemble the valve actuator to manually operate the valve to open or close or to repair the valve. Summary of the Invention

[0003] The purpose of this invention is to provide a valve actuator that solves the technical problem of how to manually operate the valve to start and stop after the valve actuator is installed.

[0004] To achieve the above objectives, the valve actuator proposed in this invention includes:

[0005] The frame includes a fixed plate, a mounting plate, and a rotating shaft. The mounting plate is located below the fixed plate. A lifting cam is mounted on one side of the fixed plate facing the mounting plate. The central area of ​​the surface of the lifting cam has a first through hole for the rotating shaft to pass through. The surface of the mounting plate has a second through hole. The axis of the rotating shaft is coaxial with the axis of the lifting cam. The outer circumferential surface of the lifting cam has a stroke groove with a connected snap-fit ​​stroke and a rising stroke.

[0006] A start / stop control assembly includes a turntable, a pressure shaft, and a base plate. The turntable is rotatably mounted on the mounting plate, and the base plate is located below the mounting plate. One end of the rotating shaft is rotatably mounted on the fixed plate, and the other end of the rotating shaft is connected to the turntable. When the rotating shaft rotates, it drives the turntable to rotate in the same direction. A third through hole is provided on the surface of the turntable, and the pressure shaft is movably inserted into the third through hole. A roller follower is installed at one end of the pressure shaft, and the roller follower is installed in the stroke groove. The other end of the pressure shaft passes through the second through hole and is connected to the base plate. A pawl is provided on the side of the base plate opposite to the pressure shaft, and the pawl is movably engaged in the structural gap between the spokes of the valve handle.

[0007] The pressure shaft has a latching state and a rising state. In the latching state, the rotating shaft drives the pressure shaft into the latching stroke, and the roller follower rolls along the cam surface of the latching stroke to make the pressure shaft and the pawl move at the same horizontal height to open or close the valve. In the rising state, the rotating shaft drives the pressure shaft into the rising stroke, and the roller follower rolls along the cam surface of the rising stroke to make the pressure shaft gradually rise so that the pawl moves away from the handle.

[0008] and a drive mechanism for driving the rotating shaft to rotate.

[0009] Optionally, the turntable is equipped with a torque limiter, and the other end of the rotating shaft is connected to the torque limiter.

[0010] Optionally, a gear disk is mounted on the shaft of the rotating shaft;

[0011] The drive mechanism is a motor, which is mounted on the frame. The drive shaft of the motor is equipped with a drive gear, which meshes with the gear disc.

[0012] Optionally, the fixing plate is equipped with a bearing assembly, and one end of the rotating shaft is connected to the bearing assembly.

[0013] Optionally, a guide sleeve is installed in the third through hole, and the pressure shaft is movably inserted into the guide sleeve.

[0014] Optionally, there are two pressure shafts, which are equally mounted on the turntable along the circumferential direction.

[0015] Optionally, the other end of the pressure shaft is provided with a first connecting part, and the side of the base plate facing the pressure shaft is provided with a second connecting part, wherein the first connecting part is detachably connected to the second connecting part.

[0016] Optionally, the base plate is made of metal.

[0017] Optionally, a counterweight is provided in the central region of the surface of the base plate.

[0018] Optionally, the base plate is equipped with a detachable structure, and the claw is connected to the detachable structure.

[0019] The beneficial effects of this invention are as follows: In practical applications, the chuck first engages with the gap in the valve handle. As the shaft rotates, it drives the turntable and base plate to rotate in the same direction. When the pressure shaft is in its holding stroke, the chuck, connected to the handle, can be used to push the handle forward or reverse to open or close the valve. When the pressure shaft enters its rising stroke, it gradually rises, causing the base plate and chuck to rise gradually, moving the chuck away from the handle. Once the chuck is completely disengaged from the handle gap, the operator can manually rotate the handle. The valve actuator disclosed in this invention is installed after the valve, not only controlling the valve's start and stop but also actively separating from the valve handle, without restricting manual operation. It offers extremely high flexibility and has a simple, compact structure, suitable for most valve structures with handles, making it widely applicable. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the valve actuator of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the valve actuator of the present invention after removing the frame;

[0023] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure after the fixing plate is removed;

[0024] Figure 4 This is a three-dimensional structural diagram of a ball valve in the prior art.

[0025] Explanation of icon numbers:

[0026] 1. Frame; 2. Fixing plate; 21. Lifting cam; 211. Stroke groove; 2111. Snap-in stroke; 2112. Lifting stroke; 212. First through hole; 22. Bearing assembly; 3. Mounting plate; 4. Rotary shaft; 41. Gear disk; 5. Turntable; 51. Torque limiter; 52. Guide sleeve; 6. Pressure shaft; 61. Roller follower; 62. First connecting part; 7. Base plate; 71. Claw; 72. Second connecting part; 73. Counterweight.

[0027] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] like Figures 1 to 3As shown in this embodiment of the invention, the valve actuator includes: a frame 1, the frame 1 having a fixing plate 2, a mounting plate 3, and a rotating shaft 4, the mounting plate 3 being located below the fixing plate 2, a lifting cam 21 being mounted on one side of the fixing plate 2 facing the mounting plate 3, the central area of ​​the surface of the lifting cam 21 having a first through hole 212 for the rotating shaft 4 to pass through, the surface of the mounting plate 3 having a second through hole (not shown in the figure), the axis of the rotating shaft 4 being coaxial with the axis of the lifting cam 21, and the outer side of the lifting cam 21... A travel groove 211 is formed on the circumferential surface. The travel groove 211 has a connected snap-fit ​​travel 2111 and a rising travel 2112. The start / stop control assembly includes a turntable 5, a pressure shaft 6, and a base plate 7. The turntable 5 is rotatably mounted on the mounting plate 3. The base plate 7 is located below the mounting plate 3. One end of the rotating shaft 4 is rotatably mounted on the fixed plate 2, and the other end of the rotating shaft 4 is connected to the turntable 5. When the rotating shaft 4 rotates, it drives the turntable 5 to rotate in the same direction. A third through hole (not shown in the figure) is formed on the surface of the turntable 5. The pressure shaft 6 is movably inserted into the third through hole. One end of the pressure shaft 6 is equipped with a roller follower 61, which is installed in the stroke groove 211. The other end of the pressure shaft 6 passes through the second through hole and is connected to the base plate 7. The side of the base plate 7 opposite to the pressure shaft 6 is provided with a claw 71, which is movably engaged in the structural gap between the spokes of the valve handle. The pressure shaft 6 has a engaged state and a raised state. In the engaged state, the rotating shaft 4 rotates to drive the pressure shaft 6 into the engaged stroke 2. 111, the roller follower 61 rolls along the cam surface of the engagement stroke 2111 to move the pressure shaft 6 and the pawl 71 at the same horizontal height for opening or closing the valve; in the rising state, the rotating shaft 4 rotates to drive the pressure shaft 6 into the rising stroke 2112, and the roller follower 61 rolls along the cam surface of the rising stroke 2112 to gradually raise the pressure shaft 6 so that the pawl 71 moves away from the handle; and a drive mechanism (not shown in the figure) is used to drive the rotating shaft 4 to rotate.

[0032] The working principle of this invention is as follows: In practical applications, the pawl 71 is inserted vertically downwards into the gap of the valve handle. The spokes of the handle are engaged with the pawl 71. While the rotating shaft 4 rotates, it drives the turntable 5 and the base plate 7 to rotate in the same direction. When the pressure shaft 6 is in its holding stroke, because the pawl 71 is connected to the handle, it can be used to drive the handle to rotate forward or backward to open or close the valve. When the pressure shaft 6 enters its rising stroke 2112, the pressure shaft 6 gradually rises, driving the base plate 7 and the pawl 71 to gradually rise, causing the pawl 71 to gradually move away from the handle. When the pawl 71 is completely disengaged from the handle gap, the operator can manually rotate the handle. The valve actuator disclosed in this invention is installed after the valve, which not only controls the valve's opening and closing but also does not restrict the operator's manual operation of the valve, providing extremely high flexibility and a simple and ingenious structure. Specifically, in practical applications, such as... Figures 1 to 3As shown, when the shaft 4 rotates clockwise, the pressure shaft 6 moves during the holding stroke, and the multiple movement points of the pawl 71 remain at the same horizontal height. The pawl 71 pushes the handle to rotate clockwise, which can be used to close the valve. As the shaft continues to rotate, the pressure shaft 6 gradually moves from the holding stroke to the rising stroke 2112. The pressure shaft 6 gradually rises, causing the base plate 7 and the pawl 71 to gradually rise as well. This allows the pawl 71 to disengage from the structural gap between the handle spokes and gradually move away from the handle. Once the pawl 71 is completely disengaged from the handle gap, the operator can manually rotate the handle. When the shaft 4 rotates in reverse, the pressure shaft 6 gradually returns from the rising stroke 2112 to the holding stroke. The pressure shaft 6 gradually descends, causing the pawl 71 to engage with the structural gap in the handle. The pressure shaft 6 continues to move along the holding stroke, and the pawl 71 pushes the handle to rotate counterclockwise, which can be used to open the valve. Of course, the rotation angle of the shaft 4 should not exceed 90 degrees (the angle required for normal valve operation) to prevent valve damage. The overall structure of this invention is a multi-layered turret structure. The bottom layer is a base plate 7, which is equipped with claws 71 for engaging with valve handles. The middle layer has a turntable 5, which is rotatably mounted on a mounting plate 3. The mounting plate 3 is fixed and does not rotate. The turntable 5 is used to mount the rotating shaft 4 and the pressure shaft 6. During the rotation of the turntable 5, the pressure shaft 6 drives the base to rotate and the structure to rise and fall. Of course, the surface of the mounting plate 3 may have a groove (not shown in the figure) adapted to the turntable 5. The groove is mainly used to support the turntable 5. A second through hole is opened in the groove. To ensure the rotation flexibility of the turntable 5, a plane bearing (not shown in the figure) can also be installed in the groove. The rotation flexibility of the turntable 5 is increased by the force of the balls in the plane bearing. The top layer is a lifting cam 21, which is fixed to the frame 1 and does not rotate. It is used to mount the roller follower 61 on the pressure shaft 6. The roller follower 61 rolls on the cam surface of the stroke groove 211 of the lifting cam 21 to guide the pressure shaft 6 to rise and fall. Multiple claws 71 are evenly distributed along the circumference of the base plate 7. Each claw 71 is inserted into a corresponding structural gap in the handle, increasing the uniformity of force distribution on the handle, improving the handle's rotational flexibility, reducing the movement resistance of each claw 71, and increasing the power output efficiency of the drive mechanism. This invention has a simple, ingenious, and compact structure, is suitable for most valve structures with handles, and has a wide range of applications.

[0033] In the technical solution of this invention, the turntable 5 is equipped with a torque limiter 51, and the other end of the rotating shaft 4 is connected to the torque limiter 51. Figures 1 to 3 As shown.

[0034] In this type of structure, the torque limiter 51 is used to allow the shaft 4 to slip when it is jammed, thus protecting the mechanism from damage. This type of structure is existing technology and will not be described in detail here. When the handle is turned, if the shaft 4 jams, it will slip under the action of the torque limiter 51, causing the pawl 71 to make soft contact with the handle, rather than making tight contact. This ensures that the valve handle is protected during the repair of jammed faults.

[0035] In the technical solution of this invention, a gear disk 41 is mounted on the shaft of the rotating shaft 4; the driving mechanism is a motor, which is mounted on the frame 1, and a drive gear is mounted on the transmission shaft of the motor, the drive gear meshing with the gear disk 41. Figures 1 to 3 As shown.

[0036] This type of structure, through the combination of motor and gears, can increase driving flexibility and ensure thrust stability, and prevent excessive rotation of the handle.

[0037] To support the rotation of the rotating shaft 4, in the technical solution of this invention, the fixing plate 2 is equipped with a bearing assembly 22, and one end of the rotating shaft 4 is connected to the bearing assembly 22. For example... Figures 1 to 3 As shown.

[0038] In the technical solution of this invention, a guide sleeve 52 is installed inside the third through hole, and the pressure shaft 6 is movably inserted into the guide sleeve 52. Figures 1 to 3 As shown.

[0039] The pressure shaft 6 is inserted into the guide sleeve 52 to increase the stability of the movement of the pressure shaft 6 and reduce the vibration generated by friction with the turntable 5, thereby increasing the stability of the movement of the turntable 5.

[0040] To increase the motion stability of the base plate 7, in this invention, there are two pressure shafts 6, which are equally installed on the turntable 5 along the circumferential direction. Figures 1 to 3 As shown.

[0041] In the technical solution of the present invention, the other end of the pressure shaft 6 is provided with a first connecting part 62, and the bottom plate 7 is provided with a second connecting part 72 on one side facing the pressure shaft 6. The first connecting part 62 is detachably connected to the second connecting part 72.

[0042] To facilitate connection and installation, both the first connecting part 62 and the second connecting part 72 can be connection structures with screw holes (not shown in the figure). The two are connected by screws (not shown in the figure) for easy disassembly and replacement.

[0043] To increase the service life of the structure, the base plate 7 in this invention is made of metal.

[0044] In the technical solution of this invention, a counterweight 73 is provided in the central region of the surface of the base plate 7. For example... Figures 1 to 3 As shown.

[0045] In practical applications, the pawl 71 is also located in the central area of ​​the surface of the base plate 7 to ensure stress stability. The counterweight 73 corresponds to the pawl 71, so that the base plate 7 and the pawl 71 stabilize the handle, which can further increase the structural motion stability and improve the rotation efficiency of the handle.

[0046] In the technical solution of the present invention, the base plate 7 is equipped with a detachable structure, and the claw 71 is connected to the detachable structure (not shown in the figure).

[0047] In practical applications, the size of the structural gap between the spokes of the handle on different valve structures varies. It can be adapted and connected by replacing the 71 with a 71 of different sizes. Therefore, the 71 needs to be detachable and replaceable. The detachable structure can also be a screw structure, etc.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A valve actuator, characterized by include: The frame includes a fixed plate, a mounting plate, and a rotating shaft. The mounting plate is located below the fixed plate. A lifting cam is mounted on one side of the fixed plate facing the mounting plate. The central area of ​​the surface of the lifting cam has a first through hole for the rotating shaft to pass through. The surface of the mounting plate has a second through hole. The axis of the rotating shaft is coaxial with the axis of the lifting cam. The outer circumferential surface of the lifting cam has a stroke groove with a connected snap-fit ​​stroke and a rising stroke. A start / stop control assembly includes a turntable, a pressure shaft, and a base plate. The turntable is rotatably mounted on the mounting plate, and the base plate is located below the mounting plate. One end of the rotating shaft is rotatably mounted on the fixed plate, and the other end of the rotating shaft is connected to the turntable. When the rotating shaft rotates, it drives the turntable to rotate in the same direction. A third through hole is provided on the surface of the turntable, and the pressure shaft is movably inserted into the third through hole. A roller follower is installed at one end of the pressure shaft, and the roller follower is installed in the stroke groove. The other end of the pressure shaft passes through the second through hole and is connected to the base plate. A pawl is provided on the side of the base plate opposite to the pressure shaft, and the pawl is movably engaged in the structural gap between the spokes of the valve handle. The pressure shaft has a latching state and a rising state. In the latching state, the rotating shaft drives the pressure shaft into the latching stroke, and the roller follower rolls along the cam surface of the latching stroke to make the pressure shaft and the pawl move at the same horizontal height to open or close the valve. In the rising state, the rotating shaft drives the pressure shaft into the rising stroke, and the roller follower rolls along the cam surface of the rising stroke to make the pressure shaft gradually rise so that the pawl moves away from the handle. and a drive mechanism for driving the rotating shaft to rotate.

2. The valve actuator of claim 1, wherein, The turntable is equipped with a torque limiter, and the other end of the rotating shaft is connected to the torque limiter.

3. The valve actuator of claim 1, wherein, A gear disc is mounted on the shaft of the rotating shaft; The drive mechanism is a motor, which is mounted on the frame. The drive shaft of the motor is equipped with a drive gear, which meshes with the gear disc.

4. The valve actuator of claim 1, wherein, The fixed plate is equipped with a bearing assembly, and one end of the rotating shaft is connected to the bearing assembly.

5. The valve actuator of claim 1, wherein, A guide sleeve is installed in the third through hole, and the pressure shaft is movably inserted into the guide sleeve.

6. The valve actuator of claim 1, wherein There are two pressure shafts, and the two pressure shafts are equally installed on the turntable along the circumferential direction.

7. The valve actuator according to any one of claims 1 to 6, wherein The other end of the pressure shaft is provided with a first connecting part, and the bottom plate is provided with a second connecting part on one side facing the pressure shaft. The first connecting part is detachably connected to the second connecting part.

8. The valve actuator according to any one of claims 1 to 6, wherein The base plate is made of metal.

9. The valve actuator according to any one of claims 1 to 6, wherein A counterweight is provided in the central area of ​​the surface of the base plate.

10. The valve actuator of any one of claims 1 to 6, wherein, The base plate is equipped with a detachable structure, and the claw is connected to the detachable structure.

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