Periodically online maintainable fork type actuator

Abstract

The application relates to a regularly online-maintained fork type actuator, and relates to the technical field of pneumatic actuators. The actuator comprises a box body, a box cover arranged on the box body, a driving rod arranged in the box body, and a transmission member. Opposite outer sides of the box cover are respectively provided with a cylinder assembly and a spring assembly, which drive the driving rod to rotate through the transmission member. An air inlet pipe, a three-way joint, a control pipe and a gas control valve are arranged outside the box body. The three-way joint is respectively fixed with an air inlet end, a first air outlet end and a second air outlet end. The air inlet pipe is communicated with the gas control valve on one side and the cylinder assembly on the other side. The control pipe is communicated with a control port of the gas control valve on the other end. An electromagnetic valve and a mechanical valve are arranged in series on the control pipe. In the application, the limit valve is triggered to open through the collision between the cam and the sensing block. The mechanical valve is automatically reopened through the gas impact, the rotation angle of the driving rod is accurately controlled, and the risk of completely closing the ball valve in the online maintenance process is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic actuators, in particular to a regularly online maintenance fork type actuator. BACKGROUND

[0002] The fork type pneumatic actuator, also known as fork type pneumatic cylinder, is an actuator that adopts the principle of angular stroke piston. It relies on compressed air as driving force and converts air pressure into mechanical action through internal precise mechanical structure to realize the opening and closing operation or accurate control of 90° rotary valves such as ball valves, butterfly valves and plug valves. Although the application proportion in the field of pneumatic actuators is not high, the fork type pneumatic actuator shows unique value due to its excellent performance in large diameter and high torque environment.

[0003] In the prior art, a pneumatic actuator specially designed for ball valves integrates cylinder module, transmission module and spring module and other core components. The transmission module is particularly innovative. The driving rod structure inside the transmission module is designed ingeniously. Through the precise cooperation of U-shaped groove and piston pin, the linear motion of the piston in the cylinder is successfully converted into the rotary motion of the driving rod, thereby controlling the opening and closing of the valve. An example of such a pneumatic actuator can be found in the patent document with publication number CN215635289U.

[0004] When such a pneumatic actuator is installed on a normally open ball valve, the pipeline system is usually unobstructed. However, for safety maintenance considerations, regular online maintenance is required annually. The existing online maintenance usually adopts the following method: control the pneumatic actuator to make the ball valve complete an opening and closing cycle, for example, control the valve ball to adjust slightly from the fully open state (100% opening) to 85% opening, and then return to the fully open state. This method does not affect the normal transportation of the pipeline connected to the ball valve, and can realize online maintenance to determine whether the ball valve can work normally. The problem is that the pneumatic actuator relies on the injection of compressed gas to drive the valve stem to rotate, and the injection amount of compressed gas is difficult to accurately control, which can easily cause the ball valve originally in the normally open state to be accidentally completely closed, thereby interfering with the normal flow of the medium, and there is room for improvement. SUMMARY

[0005] The purpose of the present application is to provide a regularly online maintenance fork type actuator to solve the problem that in the related art, the pneumatic actuator is difficult to adjust the corresponding ball valve to the required opening degree by controlling the compressed gas when it is in online maintenance, which can easily cause the ball valve to be directly closed, thereby affecting the transportation of the transported medium.

[0006] The regularly online maintenance fork type actuator provided by the present application adopts the following technical solution:

[0007] The invention discloses a regularly online maintenance yoke type actuator, which comprises a box, a box cover arranged on the box, a driving rod arranged in the box and a transmission member, opposite outer sides of the box cover are respectively provided with a cylinder assembly and a spring assembly, the cylinder assembly drives the driving rod to rotate through the transmission member, the box is externally provided with an air inlet pipe, a tee joint, a control pipe and an air control valve, the tee joint is fixedly provided with an air inlet end, a first air outlet end communicated with one side of the air control valve and a second air outlet end communicated with one end of the control pipe, the air inlet pipe is communicated with the other side of the air control valve and the cylinder assembly at two ends, the other end of the control pipe is communicated with a control port of the air control valve, the control pipe is serially connected with an electromagnetic valve for remote control and a mechanical valve for on-site control, when the electromagnetic valve and the mechanical valve are both turned on, the air control valve is turned on, compressed gas is injected into the cylinder assembly through the air control valve to drive the driving rod to rotate, when any one of the electromagnetic valve and the mechanical valve is turned off, the air control valve is turned off, compressed gas cannot be injected into the cylinder assembly, and the driving rod is reversely rotated under the action of the spring assembly.

[0008] By adopting the above technical scheme, the double control of the electromagnetic valve and the mechanical valve is used to ensure that the compressed gas can only be injected into the cylinder assembly through the air control valve to drive the driving rod to rotate when both of them are turned on, so as to accurately control the opening of the ball valve connected with the driving rod. When any one of the electromagnetic valve and the mechanical valve is turned off, the air control valve is turned off, and the compressed gas cannot be injected into the cylinder assembly, so that the driving rod is reversely rotated under the action of the spring assembly, thereby realizing the safe adjustment of the opening of the ball valve. The design effectively solves the problem that the injection amount of compressed gas is difficult to accurately control in the prior art, which easily leads to the accidental complete closing of the ball valve, improves the safety and reliability of the pneumatic actuator in the online maintenance process, and ensures the normal operation of medium conveying.

[0009] Optionally, the end of the air inlet end is fixedly connected with a filter pressure reducing valve.

[0010] By adopting the above technical scheme, the main function of the filter pressure reducing valve is to filter and reduce the pressure of the compressed gas entering the pneumatic actuator. The filtering function can effectively remove impurities and particulate matter in the gas to prevent them from entering the inside of the cylinder assembly and causing damage to or affecting the normal operation of the precise mechanical structure. The pressure reducing function can ensure that the gas pressure entering the cylinder assembly is stable and moderate, avoiding the abnormal rotation or damage of the driving rod caused by the excessively high gas pressure, and also improving the response speed and action accuracy of the entire pneumatic actuator. Therefore, the addition of the filter pressure reducing valve not only prolongs the service life of the pneumatic actuator, but also improves its working efficiency and safety, providing users with a more stable and reliable use experience.

[0011] Optionally, one end of the drive rod penetrates through the box cover and extends to the outside, a cam is fixedly sleeved on the outer end of the drive rod; the box cover is fixedly provided with a limiting valve in a normally closed state, a sensing block is fixedly arranged on the side of the limiting valve facing the cam; the outside of the box body is provided with a limiting pipe and an adjusting pipe, the two ends of the limiting pipe are respectively in communication with one side of the limiting valve and the bottom side of the mechanical valve; one end of the adjusting pipe is in communication with a control pipe part between the three-way joint and the electromagnetic valve, and the other end is in communication with the other side of the limiting valve; when the mechanical valve is manually closed, the drive rod is reset and drives the cam to rotate until the cam collides with the sensing block to open the limiting valve, and then the gas impacts the bottom side of the mechanical valve through the limiting valve to automatically open the mechanical valve, and after the mechanical valve is reopened, the gas supply is started to reverse the rotation of the drive rod and the cam, and the limiting valve is closed again.

[0012] By adopting the above technical scheme, when the mechanical valve is manually closed, the drive rod is naturally reset under the action of the spring assembly and drives the cam to rotate. Once the cam collides with the sensing block on the limiting valve, the limiting valve is immediately opened to allow the gas to impact the bottom side of the mechanical valve through the limiting pipe to automatically reopen the mechanical valve, thereby restoring the gas supply, reversing the rotation of the drive rod and the cam, and closing the limiting valve again. This process not only ensures that the drive rod can be reset smoothly and controllably, but also significantly reduces the risk of completely closing the corresponding ball valve due to misoperation during online maintenance, thereby ensuring the normal operation of medium delivery. This design not only improves the reliability and safety of the pneumatic actuator, but also provides users with a more stable and controllable use experience.

[0013] Optionally, a support plate is fixedly arranged on the outer side of the box body, and the gas control valve, the electromagnetic valve and the mechanical valve are fixedly arranged on the side of the support plate away from the box body.

[0014] By adopting the above technical scheme, not only the structure layout of the pneumatic actuator is optimized to be more compact and orderly, but also the stability and reliability of the valve assembly are improved. The use of the support plate enhances the load-bearing capacity of the valve assembly and reduces the risk of loosening or damage caused by vibration or external force. At the same time, the centralized arrangement also facilitates users to perform daily online maintenance and maintenance of the valve assembly, thereby improving the work efficiency.

[0015] Optionally, a protective plate is fixedly arranged above the cam on the box cover, an installation block is fixedly arranged on the side of the protective plate away from the box cover, an indicating disc is rotatably arranged on the installation block, and the outer end of the drive rod is fixedly connected with the indicating disc coaxially after penetrating through the protective plate and the installation block.

[0016] By adopting the above technical scheme,

[0017] Optionally, a blocking plate is hingedly connected to the side edge of the box cover away from the box body, and an engaging block is fixedly arranged on the side of the mounting block and located above the blocking plate; the blocking plate can be turned upward to a vertical state, and one side of the blocking plate in the vertical state abuts against the outer side of the engaging block; the engaging block is provided with a locking member for detachably fixing the blocking plate in the vertical state.

[0018] By adopting the above technical scheme, the protective plate can effectively shield the cam and other moving parts, preventing accidental touching from causing personal injury or equipment damage, and improving the safety of the pneumatic actuator. At the same time, the indicating disc rotates synchronously with the driving rod, and the user can intuitively understand the rotation angle and current state of the driving rod by observing the scale or mark on the indicating disc, thereby realizing accurate control and monitoring of the pneumatic actuator.

[0019] Optionally, the locking member includes two locking rods that are arranged side by side and slide on the side of the engaging block, and the locking rods can reciprocally slide in the vertical direction; the engaging block is provided with an elastic extrusion member for driving the locking rods to slide downward; and the end of the locking rod near the blocking plate is provided with a locking gap for the upper edge of the blocking plate in the vertical state to be clamped into.

[0020] By adopting the above technical scheme, when the blocking plate is installed in place, the locking rods automatically slide downward under the action of the elastic extrusion member, and the locking gap at the end of the locking rod can clamp the upper edge of the blocking plate, thereby effectively preventing the blocking plate from being displaced or falling off in the vertical direction.

[0021] Optionally, the elastic extrusion member includes a first spring, a limiting block fixedly arranged on the mounting block, and a stop block fixedly arranged on the outer periphery of the locking rod, the stop block is located below the limiting block, the limiting block is provided with a limiting hole for the locking rod to penetrate through, and the two ends of the first spring are fixedly connected to the sides of the stop block and the limiting block that are close to each other.

[0022] By adopting the above technical scheme, the two ends of the first spring are fixedly connected to the stop block and the limiting block, respectively, thereby providing the locking rod with a continuous downward extrusion force, ensuring that the locking rod can be tightly clamped into the locking gap of the upper edge of the blocking plate, and effectively preventing the blocking plate from loosening or falling off. At the same time, the limiting block and the limiting hole limit the sliding range of the locking rod, avoiding excessive movement or misalignment of the locking rod, and improving the stability and reliability of the locking mechanism.

[0023] Optionally, a horizontal rod is arranged above the box cover, the two ends of the horizontal rod are fixedly connected to the upper ends of the two locking rods, respectively, and a traction rod is ball-hingedly connected to the horizontal rod.

[0024] By adopting the technical scheme, the user can easily drive the cross rod and the two locking rods connected thereto to move synchronously by pulling the traction rod, so as to realize quick unlocking or locking of the locking rod. This design not only simplifies the operation process of locking and unlocking, reduces the operation difficulty, but also improves the work efficiency.

[0025] Optionally, a horizontal plate above the air control valve and the mechanical valve is fixed on the upper side edge of the support plate in the horizontal direction, and a blocking plate is hingedly connected to the side edge of the horizontal plate away from the support plate; the blocking plate can be turned downward to a vertical state to protect the outside of the air control valve and the mechanical valve; the blocking plate can be turned upward to a horizontal state to be attached to the upper side of the horizontal plate; a hanging ring is fixed on the side edge of the blocking plate away from the horizontal plate, and a hook is fixed on the end of the traction rod away from the cross rod; the hook can be clamped into the hanging ring when the blocking plate is attached to the upper side of the horizontal plate, thereby driving the locking rod to move upward.

[0026] By adopting the technical scheme, when the blocking plate is turned downward to the vertical state, the air control valve and the mechanical valve can be effectively shielded and protected, preventing damage caused by external factors such as dust and moisture. At the same time, by turning the blocking plate upward to the horizontal state and using the hook to hang on the hanging ring, the locking rod can be conveniently driven to move upward to realize the unlocking operation of the locking rod. This design not only improves the protection performance of the pneumatic actuator, but also simplifies the operation process and improves the work efficiency.

[0027] In summary, the present application has the following beneficial technical effects:

[0028] When the mechanical valve is manually closed, the driving rod is naturally reset under the action of the spring assembly and drives the cam to rotate. Once the cam collides with the sensing block on the limiting valve, the limiting valve is immediately opened to allow the gas to pass through the limiting pipe to impact the bottom side of the mechanical valve, prompting the mechanical valve to automatically reopen, thereby restoring the gas supply, and the driving rod and the cam rotate in reverse, and the limiting valve is closed again. This process not only ensures that the driving rod can be reset smoothly and controllably, but also significantly reduces the risk of completely closing the corresponding ball valve due to misoperation during online maintenance, thereby ensuring the normal operation of medium delivery. This design not only improves the reliability and safety of the pneumatic actuator, but also provides users with a more stable and controllable use experience. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0030] Figure 1is a schematic diagram of the overall structure of Embodiment 1 of the present application;

[0031] Figure 2 is a schematic diagram of the sectional structure of Embodiment 1 of the present application;

[0032] Figure 3 is a schematic diagram of the sectional structure of Embodiment 1 of the present application;

[0033] Figure 4 is a schematic diagram of the sectional structure of Embodiment 1 of the present application;

[0034] Figure 5 is a schematic diagram of the sectional structure of Embodiment 1 of the present application;

[0035] Figure 6 is a schematic diagram of the sectional structure of Embodiment 1 of the present application;

[0036] Figure 7 is a schematic diagram of the overall structure of Embodiment 2 of the present application;

[0037] Figure 8 is a schematic diagram of the sectional structure of Embodiment 2 of the present application;

[0038] Figure 9 is a schematic diagram of the sectional structure of Embodiment 2 of the present application;

[0039] Figure 10 is Figure 9 is an enlarged schematic diagram of Part A in FIG. 8.

[0040] In the figure, 1, box seat assembly; 11, box body; 12, box cover; 13, drive rod; 14, transmission member; 141, push rod; 1411, guide notch; 142, guide rod; 143, transmission rod; 15, cam; 16, support plate; 17, protective plate; 18, mounting block; 19, indicator disc; 2, cylinder assembly; 21, cylinder body; 22, piston block; 23, piston rod; 3, spring assembly; 31, sleeve; 32, compression spring; 33, spring rod; 34, baffle; 4, air supply assembly; 41, air inlet pipe; 42, tee joint; 421, air inlet end; 422, first air outlet end; 423, second air outlet end; 43, control pipe; 44, air control valve; 45, electromagnetic valve; 46, mechanical valve; 47, limit valve; 471, sensing block; 48, adjustment pipe; 49, limit pipe; 5, filter pressure reducing valve; 6, protection assembly; 61, cross plate; 62, barrier plate; 621, hanging ring; 7, plugging assembly; 71, plugging plate; 72, engaging block; 8, locking member; 81, locking rod; 811, locking notch; 82, elastic extrusion member; 821, first spring; 822, limit block; 823, stop block; 83, cross rod; 84, traction rod; 841, hook. DETAILED DESCRIPTION

[0041] The application will be further described in detail below with reference to all the accompanying drawings. EMBODIMENT

[0042] REFERENCE Figure 1 AND Figure 2 A regularly online maintenance yoke type actuator, comprising a box seat assembly 1, a cylinder assembly 2 and a spring assembly 3, wherein the box seat assembly 1 comprises a box body 11, a box cover 12 arranged on the box body 11, a drive rod 13 located in the box body 11 and a transmission member 14, the cylinder assembly 2 and the spring assembly 3 are respectively fixedly arranged on opposite sides of the box body 11, and the cylinder assembly 2 and the spring assembly 3 drive the drive rod 13 to rotate through the transmission member 14.

[0043] The cylinder assembly 2 comprises a cylinder body 21 and a piston block 22 located in the cylinder body 21, and the piston block 22 is fixedly provided with a piston rod 23 extending through the cylinder body 21 to the outside; the spring assembly 3 comprises a sleeve 31 and a compression spring 32 located in the sleeve 31, and a spring rod 33 located in the middle of the compression spring 32, wherein one end of the spring rod 33 extends through the end of the sleeve 31 to the outside, the other end is fixedly provided with a baffle 34, and the two ends of the compression spring 32 are respectively abutted against the baffle 34 and the inner wall of the sleeve 31; the cylinder assembly 2 and the spring assembly 3 are not described here.

[0044] REFERENCE Figure 3The transmission member 14 comprises a push rod 141 fixed on the outer periphery of the driving rod 13, and a guide notch 1411 is formed in the end of the push rod 141 away from the driving rod 13 along the length direction of the push rod 141, a guide rod 142 is slidably arranged in the guide notch 1411, a transmission rod 143 perpendicular to the driving rod 13 in the length direction is rotatably arranged on the guide rod 142, the piston rod 23 extends into the box 11 and is coaxially fixedly connected with one end of the transmission rod 143, and the spring rod 33 extends into the box 11 and is coaxially fixedly connected with the other end of the transmission rod 143;

[0045] When the compressed gas is supplied into the cylinder body 21, the piston rod 23 slides away from the box 11, the spring rod 33 and the baffle 34 synchronously slide, the compression spring 32 is compressed, and the driving rod 13 rotates; when the gas supply is stopped, the compression spring 32 is reset, the spring rod 33 and the baffle 34 reversely slide under the action of the compression spring 32, and the driving rod 13 reversely rotates and resets.

[0046] Referring to Figure 4 The box 11 is externally provided with a gas supply assembly 4, wherein the gas supply assembly 4 comprises an air inlet pipe 41, a three-way joint 42, a control pipe 43 and a gas control valve 44, three joints on the three-way joint 42 are respectively an air inlet end 421 for injecting compressed gas, a first air outlet end 422 in communication with one side of the gas control valve 44 and a second air outlet end 423 in communication with one end of the control pipe 43;

[0047] The air inlet end 421 is fixedly connected with a filter pressure reducing valve 5 at the end, and the air inlet pipe 41 is in communication with the other side of the gas control valve 44 and the cylinder assembly 2 at two ends, the control pipe 43 is in communication with a control port on the gas control valve 44 at the other end, and an electromagnetic valve 45 and a mechanical valve 46 are serially arranged on the control pipe 43, wherein the electromagnetic valve 45 is located between the three-way joint 42 and the mechanical valve 46; wherein the mechanical valve 46 and the electromagnetic valve 45 are in the normally open state when the ball valve is opened, and the staff can remotely control the opening and closing of the electromagnetic valve 45; the staff can manually control the closing of the mechanical valve 46 after the corresponding key is inserted and rotated, so as to ensure that irrelevant personnel open the mechanical valve 46;

[0048] When the electromagnetic valve 45 and the mechanical valve 46 are both in the open state, the compressed gas is injected into the gas control valve 44 after passing through the second air outlet end 423 and the control pipe 43, so as to control the gas control valve 44 to be in the conduction state; in this state, the compressed gas is injected into the cylinder assembly 2 through the first air outlet end 422, the gas control valve 44 and the air inlet pipe 41, so as to rotate the driving rod 13 and make the ball valve connected with the driving rod 13 be in the open state; when any one of the electromagnetic valve 45 and the mechanical valve 46 is disconnected, the gas control valve 44 is disconnected, the compressed gas cannot be injected into the cylinder assembly 2 through the gas control valve 44, the driving rod 13 is reset and rotated, and the ball valve connected with the driving rod 13 is in the closed state.

[0049] Referring to Figure 4 andFigure 5 One end of the drive rod 13 penetrates the box cover 12 and extends to the outside, wherein a cam 15 is fixed on the outer end of the drive rod 13; the limit valve 47 in the normally closed state is fixed on the box cover 12, and the sensing block 471 is fixed on the side surface of the cam 15;

[0050] The outside of the box body 11 is provided with a limiting pipe 49 and an adjusting pipe 48, wherein the two ends of the limiting pipe 49 are respectively communicated with one side of the limit valve 47 and the bottom side of the mechanical valve 46; one end of the adjusting pipe 48 is communicated with the control pipe 43 part between the three-way joint 42 and the electromagnetic valve 45 through a three-way pipe fitting, and the other end is communicated with the other side of the limit valve 47;

[0051] When the mechanical valve 46 is manually closed, the drive rod 13 is reset and drives the cam 15 to rotate until the cam 15 collides with the sensing block 471 to open the limit valve 47, and then the gas impacts the bottom side of the mechanical valve 46 through the limit valve 47 to automatically open the mechanical valve 46. After the mechanical valve 46 is reopened, the drive rod 13 and the cam 15 are reversely rotated, and at this time the limit valve 47 is closed again.

[0052] In this process, the staff can adjust the installation angle of the cam 15 to adjust the timing of triggering the limit valve 47 by the cam 15; for example, after the mechanical valve 46 is manually closed, the drive rod 13 is reset and rotated to 85% opening degree from the full opening state (100% opening degree), the cam 15 will collide with the sensing block 471 on the limit valve 47, thereby controlling the mechanical valve 46 to reopen, and then the drive rod 13 is rotated to the full opening state (100% opening degree) again. In this way, the rotation angle of the drive rod 13 can be accurately controlled, and the possibility of completely closing the corresponding ball valve during online maintenance can be reduced.

[0053] In other embodiments, the installation angle of the adjusting cam 15 can also be adjusted, so that the cam 15 collides with the sensing block 471 on the limit valve 47 when it is rotated to 65% or 55% opening degree. The opening degree at the time of collision can also be adjusted to other values, that is, the opening degree of the drive rod 13 can not be unique, and can be adjusted according to actual needs.

[0054] Referring to Figure 3 and Figure 4 A support plate 16 is installed on the outer side surface of the box body 11 through a plurality of screws, the support plate 16 is parallel to the length direction of the drive rod 13, and the pneumatic control valve 44, the filter pressure reducing valve 5, the electromagnetic valve 45 and the mechanical valve 46 are all fixed on the side surface of the support plate 16 away from the box body 11 through screws, wherein the electromagnetic valve 45 and the mechanical valve 46 are fixed on the upper part of the side surface of the support plate 16, and the filter pressure reducing valve 5 and the pneumatic control valve 44 are installed on the lower part of the side surface of the support plate 16. The layout is reasonable, and the space utilization rate is improved.

[0055] Referring toFigure 6 A protective plate 17 is fixed on the box cover 12 above the cam 15, wherein a mounting block 18 is fixed on the side of the protective plate 17 away from the box cover 12, a indicating disc 19 is rotatably arranged on the mounting block 18, and the outer end of the driving rod 13 is coaxially fixedly connected with the indicating disc 19 after penetrating through the protective plate 17 and the mounting block 18; the user can directly observe the indicating plate above the box cover 12 to determine the rotation state of the driving rod 13.

[0056] The implementation principle of the embodiment of the present application is:

[0057] When the mechanical valve 46 is manually closed, the limit valve 47 is triggered to open through the collision of the cam 15 and the sensing block 471, and the mechanical valve 46 is automatically reopened by gas impact, thereby realizing accurate control of the rotation angle of the driving rod 13 and reducing the risk of complete closure of the ball valve during online maintenance. At the same time, the gas control valve 44, the filter pressure reducing valve 5, the electromagnetic valve 45 and the mechanical valve 46 are reasonably arranged by the support plate 16, thereby improving the space utilization rate. The protective plate 17 and the indicating disc 19 on the box cover 12 are designed to facilitate the user to directly observe the rotation state of the driving rod 13, thereby improving the operation convenience and safety. Embodiment

[0058] With reference to Figure 7 and Figure 8 , the difference between the embodiment of the present application and embodiment 1 is that a protective assembly 6 is arranged above the support plate 16, wherein the protective assembly 6 comprises a horizontal plate 61 fixedly arranged on the upper side edge of the support plate 16, and the horizontal plate 61 is located above the gas control valve 44, the filter pressure reducing valve 5 and the mechanical valve 46, wherein a blocking plate 62 is hingedly connected to the side edge of the horizontal plate 61 away from the support plate 16; the blocking plate 62 can be rotated downward to a vertical state to protect the outer side of the gas control valve 44, the electromagnetic valve 45 and the mechanical valve 46, and can be rotated upward to a horizontal state abutting with the upper side of the horizontal plate 61.

[0059] With reference to Figure 8 and Figure 9 , the upper side of the box cover 12 is provided with a plugging assembly 7, wherein the plugging assembly 7 comprises a plugging plate 71 hingedly connected to the side edge of the box cover 12 away from the box body 11, and a connecting block 72 is fixedly arranged on the vertical side of the mounting block 18 above the plugging plate 71; the plugging plate 71 can be rotated upward to a vertical state, and one side of the plugging plate 71 in the vertical state abuts against the outer side of the connecting block 72, and the connecting block 72 is provided with a locking piece 8 detachably fixing the plugging plate 71 in the vertical state;

[0060] The locking member 8 comprises two locking rods 81 arranged side by side and sliding on the side of the adapter block 72, wherein the locking rods 81 can slide reciprocally in the vertical direction; the adapter block 72 is provided with an elastic extrusion member 82 for driving the locking rod 81 to slide downward, and the locking rod 81 is provided with a locking gap 811 near the end of the blocking plate 71;

[0061] When it is needed to lock the blocking plate 71 rotated upward to the vertical state, the staff first overcomes the elastic force of the elastic extrusion member 82 to drive the locking rod 81 to move upward, and after the blocking plate 71 is rotated upward to the lower side of the locking rod 81, the staff stops applying force, and then under the elastic force of the elastic extrusion member 82, the upper edge of the blocking plate 71 in the vertical state is clamped into the locking gap 811 on the locking rod 81.

[0062] Referring to Figure 9 and Figure 10 , the elastic extrusion member 82 comprises a first spring 821 in a compressed state, a limiting block 822 fixedly arranged on the mounting block 18, and a stop block 823 fixedly arranged on the outer periphery of the locking rod 81, wherein the stop block 823 is located below the limiting block 822, the limiting block 822 is provided with a limiting hole for the locking rod 81 to pass through, and the two ends of the first spring 821 are fixedly connected to the sides of the stop block 823 and the limiting block 822, respectively.

[0063] Referring to Figure 8 and Figure 9 , the upper side of the box cover 12 is provided with a cross rod 83, wherein the two ends of the cross rod 83 are fixedly connected to the upper ends of the two locking rods 81, respectively, the cross rod 83 is hingedly provided with a pulling rod 84, the end of the pulling rod 84 away from the cross rod 83 is fixedly provided with a hook 841, and the side edge of the blocking plate 62 away from the horizontal plate 61 is fixedly provided with a hanging ring 621.

[0064] When the blocking plate 62 is attached to the upper side of the horizontal plate 61, the hook 841 can be clamped into the hanging ring 621, thereby driving the locking rod 81 to move upward, and in this state, the combination of the hook 841 and the hanging ring 621 not only achieves the unlocking of the blocking plate 71, but also achieves the locking of the blocking plate 62.

[0065] The implementation principle of the embodiment is as follows:

[0066] In the pneumatic actuator, the horizontal plate 61 and the blocking plate 62 are added to provide additional protection for the air control valve 44, the electromagnetic valve 45, and the mechanical valve 46. The blocking plate 62 can be flexibly rotated to protect the outer side of the valve and facilitate opening. At the same time, the blocking plate 71 on the side of the box cover 12 can be fixed in the vertical state by the locking member 8, the locking member 8 is driven by the elastic extrusion member 82, and the stability of the blocking plate 71 is ensured to protect the cam 15 below the protection plate 17. The safety and ease of use of the pneumatic actuator are improved, and it is suitable for more complex and harsh working environments.

[0067] Unless otherwise defined, the terms or scientific or technical terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the terms "first", "second", "third" and the like in the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "one", "a", or "an" and the like do not denote a quantity of one, but rather denote the presence of at least one. The terms "including", "comprising", and the like are used herein to mean that the elements or objects following the term are included in the present application, but not excluding other elements or objects. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0068] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made on the structure, shape, and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A regularly online-maintained yoke type actuator, comprising a box body (11), a box cover (12) arranged on the box body (11), a driving rod (13) and a transmission member (14) arranged in the box body (11), and a cylinder assembly (2) and a spring assembly (3) arranged on opposite outer sides of the box cover (12) respectively and driving the driving rod (13) to rotate through the transmission member (14); characterized in that, The box (11) is externally provided with an air inlet pipe (41), a tee joint (42), a control pipe (43) and a gas control valve (44), the tee joint (42) is respectively fixedly provided with an air inlet end (421), a first air outlet end (422) communicated with one side of the gas control valve (44) and a second air outlet end (423) communicated with one end of the control pipe (43); The two ends of the air inlet pipe (41) are respectively communicated with the other side of the gas control valve (44) and the cylinder assembly (2), the other end of the control pipe (43) is communicated with a control port on the gas control valve (44), and the control pipe (43) is in series with an electromagnetic valve (45) for remote control and a mechanical valve (46) for on-site control; when the electromagnetic valve (45) and the mechanical valve (46) are both turned on, the gas control valve (44) is turned on, the compressed gas is injected into the cylinder assembly (2) through the gas control valve (44), and the driving rod (13) is driven to rotate; when any one of the electromagnetic valve (45) and the mechanical valve (46) is turned off, the gas control valve (44) is turned off, the compressed gas cannot be injected into the cylinder assembly (2) through the gas control valve (44), and the driving rod (13) is reversely rotated under the action of the spring assembly (3); One end of the driving rod (13) penetrates through the box cover (12) and extends to the outside, and a cam (15) with adjustable installation angle is fixedly sleeved on the outer end of the driving rod (13); the box cover (12) is fixedly provided with a limiting valve (47) in a normally closed state, and a sensing block (471) is fixedly arranged on the side surface of the limiting valve (47) facing the cam (15); the outside of the box (11) is provided with a limiting pipe (49) and an adjusting pipe (48), the two ends of the limiting pipe (49) are respectively communicated with one side of the limiting valve (47) and the bottom side of the mechanical valve (46); one end of the adjusting pipe (48) is communicated with part of the control pipe (43) between the tee joint (42) and the electromagnetic valve (45), and the other end is communicated with the other side of the limiting valve (47); when the mechanical valve (46) is manually closed, the driving rod (13) is reset and drives the cam (15) to rotate until the cam (15) collides with the sensing block (471) to open the limiting valve (47), then the gas impacts the bottom side of the mechanical valve (46) through the limiting valve (47) to automatically open the mechanical valve (46), after the mechanical valve (46) is reopened, the gas supply starts, the driving rod (13) and the cam (15) are reversely rotated, and the limiting valve (47) is closed again; The box (11) is externally provided with a support plate (16) parallel to the length direction of the driving rod (13), and the gas control valve (44), the electromagnetic valve (45) and the mechanical valve (46) are fixedly arranged on the side surface of the support plate (16) away from the box (11); the box cover (12) is fixedly provided with a protective plate (17) above the cam (15), and a mounting block (18) is fixedly arranged on the side surface of the protective plate (17) away from the box cover (12); The box cover (12) is hinged with a blocking plate (71) on the side edge away from the box body (11), and the side of the mounting block (18) is fixed with an engaging block (72) above the blocking plate (71); the blocking plate (71) can be turned upward to a vertical state, and one side of the blocking plate (71) in the vertical state abuts against the outer side of the engaging block (72); the engaging block (72) is provided with a locking piece (8) for detachably fixing the blocking plate (71) in the vertical state. The locking piece (8) comprises two locking rods (81) which are arranged side by side and slide on the side of the engaging block (72), and the locking rods (81) can reciprocate in the vertical direction; the engaging block (72) is provided with an elastic extrusion piece (82) for driving the locking rod (81) to slide downward; and the end of the locking rod (81) close to the blocking plate (71) is provided with a locking gap (811) for clamping the upper edge of the blocking plate (71) in the vertical state. The upper side of the box cover (12) is provided with a cross bar (83), the two ends of the cross bar (83) are fixedly connected with the upper ends of the two locking rods (81), and the cross bar (83) is ball-hinged with a traction rod (84); the upper side edge of the supporting plate (16) is fixedly provided with a horizontal plate (61) above the pneumatic valve (44) and the mechanical valve (46) in the horizontal direction, and the side edge away from the supporting plate (16) of the horizontal plate (61) is hinged with a blocking plate (62); the blocking plate (62) can be turned downward to a vertical state, and the outer side of the pneumatic valve (44) and the mechanical valve (46) is protected; The blocking plate (62) can be turned upward to a horizontal state abutting against the upper side of the horizontal plate (61); the side edge away from the horizontal plate (61) of the blocking plate (62) is fixedly provided with a hanging ring (621), and the end of the traction rod (84) away from the cross bar (83) is fixedly provided with a hook (841); the hook (841) can be clamped into the hanging ring (621) when the blocking plate (62) abuts against the upper side of the horizontal plate (61), thereby driving the locking rod (81) to move upward.

2. A regularly serviceable online forked actuator according to claim 1, characterized in that The end of the air inlet end (421) is fixedly connected with a filtering pressure reducing valve (5).

3. A regularly serviceable online forked actuator according to claim 1, characterized in that The mounting block (18) is rotatably provided with an indicating disc (19), and the outer end of the driving rod (13) is coaxially fixedly connected with the indicating disc (19) after penetrating the protection plate (17) and the mounting block (18).

4. The regularly serviceable online forked actuator of claim 1, wherein, The elastic extrusion piece (82) comprises a first spring (821), a limiting block (822) fixedly arranged on the mounting block (18), and a stop block (823) fixedly arranged on the outer periphery of the locking rod (81); the stop block (823) is below the limiting block (822), the limiting block (822) is provided with a limiting hole for the locking rod (81) to penetrate, and the two ends of the first spring (821) are fixedly connected with the sides of the stop block (823) and the limiting block (822) which are close to each other.

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