Direct acting pneumatic actuator with booster

Abstract

The application relates to a direct-acting pneumatic actuator with pressurization, relates to the technical field of fluid control equipment, and comprises a valve body, a pneumatic actuator body, a piston rod, a hand wheel and a driving stabilizing assembly which is docked on the upper end of the pneumatic actuator body. The driving stabilizing assembly comprises a connecting seat, an intermittent driving structure and a stabilizing structure. In working, the intermittent driving structure is precisely adjusted in height by a first motor, and then a rotating jacking mechanism is driven by a second motor, a periodic lifting of a jacking shaft is realized by means of an inclined guide ring, and the hand wheel is step by step rotated in an intermittent manner, the rotary motion of the hand wheel is converted into linear motion of the piston rod by means of a screw nut, and then the valve rod and a valve clack are driven to realize opening and closing of the valve. The application realizes intermittent driving and stable support of the piston rod by integrating the driving stabilizing assembly, solves the problem that a traditional pneumatic actuator relies on a fixed high-pressure gas source, and has the effects of compact structure, precise driving, stable operation and strong adaptability.

Description

Technical Field

[0001] This application relates to the field of fluid control equipment technology, and in particular to a pressurized linear pneumatic actuator. Background Technology

[0002] Currently, traditional linear pneumatic actuators typically use double-acting or single-acting cylinders as the core drive component. Their working principle relies on an external independent air pressure station or air compressor system to provide stable and high-pressure compressed air. High-pressure gas is introduced into the air inlet on the actuator cylinder through an external air pipeline, pushing the internal piston to move. The piston drives the piston rod, which is rigidly connected to it, to move linearly. The piston rod is connected to the valve stem through a coupling or directly, thereby transmitting the linear motion of the piston to the valve stem, ultimately driving the valve disc to open or close the valve. Some actuators are also equipped with a manual control mechanism for easy on-site operation or use in emergency situations. A handwheel drives the lead screw to rotate, which in turn drives the piston rod to move.

[0003] However, existing technologies have obvious limitations: on the one hand, actuators must be equipped with independent, fixed, and bulky external air pressure stations and complex air supply pipeline systems, resulting in high initial investment and limited installation sites, making them extremely inconvenient for mobile or dispersed applications; on the other hand, in situations where there is no stable high-pressure air source, such as certain remote equipment, small devices, emergency equipment, or as an upgrade replacement for manual valves, traditional actuators cannot be used directly, and their versatility and adaptability are severely restricted.

[0004] Therefore, there is an urgent need for an integrated and convenient linear pneumatic actuator that can eliminate the dependence on external fixed high-pressure air stations. Summary of the Invention

[0005] The purpose of this application is to provide a pressurized straight-line pneumatic actuator to solve the problems mentioned in the background art.

[0006] This application provides a pressurized linear pneumatic actuator with the following technical solution: It includes a valve body, a valve stem installed inside the upper end of the valve body, a valve disc connected to the lower end of the valve stem, and the valve disc's exterior seals against the interior of the valve body. A first bracket is provided on the exterior of the upper end of the valve body, and a pneumatic actuator body is connected to the upper end of the first bracket. A piston rod is movably inserted inside the pneumatic actuator body, and a piston is installed on the exterior of the lower end of the piston rod, with the piston rod coaxially connected to the top of the valve stem. A second bracket is bolted to the upper end of the pneumatic actuator body, and a bearing is installed inside the upper end of the second bracket, with the bearing connected to the middle of a handwheel. The handwheel is located on the upper end of the second bracket, and the handwheel... The upper end of the actuator is fitted with a protective sleeve, and a lead screw is inserted inside the protective sleeve. A lead screw nut is fitted at the bottom of the lead screw, and the lower end of the lead screw nut is coaxially fitted with the piston rod. The actuator is characterized by further including a drive stabilizing assembly fitted to the outer side of the upper end of the pneumatic actuator body. The drive stabilizing assembly includes a connecting seat, which is bolted to the outer side of the upper end of the pneumatic actuator body. A rotating rod is rotatably connected to the middle of the upper end of the connecting seat, and a first screw is threaded to the upper end of the rotating rod. Telescopic support rods are fitted to both sides of the upper end of the connecting seat. The upper ends of the first screw and the telescopic support rods are connected to the bottom of the connecting cylinder. An intermittent drive structure is provided at the upper end of the connecting cylinder, and a stabilizing structure is provided on the outside of the connecting cylinder.

[0007] By adopting the above technical solution, namely integrating the drive stabilizing component into the upper part of the pneumatic actuator body, additional structural support and drive assistance can be provided during the operation of the actuator, thereby improving the overall stability and reliability of operation. The coordinated use of the connecting seat, rotating rod, first screw and telescopic support rod makes the height of the connecting cylinder adjustable to adapt to the installation and operation requirements under different working conditions.

[0008] Preferably, the intermittent drive structure includes a cylinder body, which is connected to the upper end of a connecting cylinder. A first motor is installed inside the cylinder body, and a second screw is connected to the top output end of the first motor. The upper end of the second screw is threadedly connected to a lifting rod. A stabilizing rod is connected to the lower end of the lifting rod and locked inside the cylinder body. A limiting cylinder is fixed in the middle of the upper end of the cylinder body. A stabilizing frame is provided at the upper end of the limiting cylinder, and the middle of the upper end of the stabilizing frame is connected to the lifting rod for limiting. The upper end of the lifting rod is connected to a rotary lifting structure, and the rotary lifting structure is connected to the outer side of the limiting cylinder.

[0009] By adopting the above technical solution, namely, the intermittent drive structure uses a first motor and a second screw to drive the lifting rod, the precise control of the rotating lifting structure is achieved. The design of the stabilizing rod and the limiting cylinder ensures the stability of the lifting process, and the stabilizing frame further limits the sway of the lifting rod, thereby improving the driving accuracy and structural rigidity.

[0010] Preferably, the rotary lifting structure includes a second motor, which is installed on the side of the cylinder. The top output end of the second motor is connected to a pulley assembly. The left side of the pulley assembly is rotatably connected to the outside of the limiting cylinder. Telescopic tubes are installed on both sides of the upper left side of the pulley assembly, and the tops of the telescopic tubes on both sides are connected to the turntable. The turntable is fixed to the bottom of the protective box. The upper part of the protective box is provided with a top plate, and a fixed shaft is locked at the lower part of the top plate. A connecting strip is slidably installed on the outside of the fixed shaft, and a guide strip is inserted into the middle of the connecting strip. A spring is provided on the upper outside of the guide strip. A top shaft is movably inserted into the end of the connecting strip away from the fixed shaft. A ball bearing is installed at the bottom of the top shaft, and the bottom of the ball bearing abuts against the guide ring. The bottom of the guide ring is locked to the lifting rod.

[0011] By adopting the above technical solution, the rotary lifting structure drives the pulley group through the second motor to drive the limit cylinder and turntable to rotate, realizing the compound motion of lifting and rotation. The design of the connecting bar, top shaft and guide ring allows the top shaft to achieve intermittent lifting action during the lifting process, ensuring intermittent contact with the inside of the handwheel to drive rotation, so as to meet the intermittent transmission movement of the valve rod and piston rod.

[0012] Preferably, the stabilizing structure includes docking rings, which are sleeved and locked on both sides of the outer end of the connecting cylinder. A vertical rod is installed between the sides of the docking rings on both sides, and a first guide plate is fixed to the sides of the docking rings on both sides. The interior of the first guide plate is connected to one side of the display frame, and the other side of the display frame is connected to a second guide plate. A clamping ring is fixed to the exterior of the second guide plate. Locking holes are equidistantly opened on the exterior of the vertical rods, and a locking shaft is inserted into the locking holes. The locking shaft is installed at one end of a moving block. The moving block is slidably sleeved on the outside of the vertical rods, and the other end of the moving block is rotatably connected to one side of the lower end of the display frame.

[0013] By adopting the above technical solution, the sturdy structure forms an adjustable support frame through the cooperation of the connecting ring, the vertical rod and the display frame. The moving block slides along the vertical rod and is locked by the locking shaft, which makes it easy to adjust the position of the clamping ring according to the actual working conditions and improves the stability of the piston rod adjustment movement.

[0014] Preferably, the upper middle part of the stabilizing frame is cylindrical, and the inner two sides of the upper cylindrical part of the stabilizing frame are limited and slidably connected to the outer two sides of the lifting rod.

[0015] By adopting the above technical solution, namely, the upper end of the stabilizing frame is cylindrical and slides and connects with the lifting rod to limit it, the rotation or deviation of the lifting rod during the movement is effectively prevented, ensuring the linearity and stability of the lifting action.

[0016] Preferably, the pulley assembly is arranged with a larger pulley on the left and a smaller pulley on the right, and the pulley assembly on the left side is fitted with a limiting sleeve on the outer side of the upper end of the limiting cylinder.

[0017] By adopting the above technical solution, namely the pulley assembly adopting a pulley structure with a larger left side and a smaller right side, the torque output capability of the left drive end is increased. At the same time, the limiting sleeve is set on the outside of the limiting cylinder to ensure the smoothness of power transmission and the compactness of the structure.

[0018] Preferably, the connecting bar connects the fixed shaft and the top shaft in series, and the fixed shaft, connecting bar and guide bar rotate around the upper circumference of the guide ring.

[0019] By adopting the above technical solution, namely connecting the fixed shaft and the top shaft in series with the connecting bar and rotating around the upper circumference of the guide ring, the linkage of multiple components and intermittent lifting function are realized, which improves the movement flexibility and control accuracy of the mechanism.

[0020] Preferably, the height of the right side of the guide ring is higher than that of the left side, and the guide ring is locked in a fixed state by the lifting rod.

[0021] By adopting the above technical solution, where the height of the right side of the guide ring is higher than that of the left side, an inclined guide surface is formed. Combined with the sliding of the ball bearings, the top shaft produces intermittent lifting and lowering movements during rotation, ensuring the accuracy of the handwheel's intermittent rotation.

[0022] Preferably, the display stand is arranged in a cross-shaped frame.

[0023] By adopting the above technical solution, namely the cross-shaped frame structure of the display stand, it has good mechanical support performance, can remain stable under multi-directional stress conditions, and is suitable for support and adjustment needs under complex working conditions.

[0024] Preferably, the upper left and right sides and the lower left and right sides of the display stand are rotatably connected to the first guide plate and the second guide plate, respectively.

[0025] By adopting the above technical solution, that is, by using a combination of rotation and sliding connection between the upper and lower ends of the display stand and the first and second guide plates respectively, the flexibility of the structure is ensured, the adjustment range and adaptability are improved, and on-site installation and debugging are facilitated.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention incorporates a drive stabilizing component, which is locked to the upper part of the pneumatic actuator body via a connecting seat. The rotating rod drives the first screw to rotate, and with the guidance of the telescopic support rods on both sides, the height of the connecting cylinder can be precisely adjusted. This allows for flexible adjustment of the initial installation height of the intermittent drive structure according to the actual position of the handwheel and the working conditions, ensuring that the subsequent lifting action and the inner wall of the handwheel are in the optimal fit. This provides a reliable structural foundation and installation adaptability for precise intermittent drive.

[0027] 2. This invention employs an intermittent drive structure, where a first motor drives a second screw to rotate, causing a lifting rod that is slidably limited by a stabilizing rod to vertically lift and lower. This precisely controls the height of the rotating lifting structure. The stabilizing frame and the lifting rod are slidably limited to prevent swaying and rotation during lifting and lowering, ensuring the absolute linearity of the lifting action. This substructure achieves independent and precise control of the lifting height, providing a stable height reference for subsequent rotating lifting actions.

[0028] 3. This invention employs a rotary lifting structure, where a second motor drives the limiting cylinder and protective box to rotate via a pulley set. Simultaneously, a guide ring, locked to the lifting rod and forming an inclined ring, causes the top shaft with ball bearings at the bottom to periodically rise and fall along the inclined surface of the guide ring during rotation. This intermittently drives the handwheel to rotate via the top shaft. This structure combines lifting and rotational motions to achieve step-by-step drive of the handwheel. Furthermore, the intermittent rotational motion is converted into intermittent linear motion of the piston rod via a lead screw nut, thus achieving precise step-by-step control of the valve opening.

[0029] 4. This invention features a stable structure in which the vertical rod is fixed to both sides of the connecting cylinder via a docking ring. The sliding of the moving block on the vertical rod causes the cross-shaped display frame to unfold or retract, thereby adjusting the position of the clamping ring and clamping it to the outside of the lead screw. The cooperation between the locking shaft and the locking hole achieves position locking after adjustment. This structure provides effective radial support for the lead screw during piston rod movement, suppressing its sway and significantly improving the smoothness of the piston rod's linear motion and the overall transmission accuracy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the structure of the driving and stabilizing component in this application; Figure 3 This is a schematic diagram of the intermittent drive structure of this application; Figure 4 This is a schematic diagram of the rotating lifting structure of this application; Figure 5 This is a schematic diagram of the stable structure of this application; Figure 6 This application Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a top view schematic diagram of the handwheel and top shaft structure of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve stem; 3. Valve disc; 4. First bracket; 5. Pneumatic actuator body; 6. Piston rod; 7. Piston; 8. Second bracket; 9. Bearing; 10. Handwheel; 11. Protective sleeve; 12. Lead screw; 13. Lead screw nut; 14. Drive stabilizing assembly; 141. Connecting seat; 142. Rotating rod; 143. First screw; 144. Telescopic support rod; 145. Connecting cylinder; 146. Intermittent drive structure; 1461. Cylinder; 1462. First motor; 1463. Second screw; 1464. Lifting rod; 1465. Stabilizing rod; 1466. Limiting cylinder; 1467. Stabilizing frame; 1468. Rotary... Top lifting structure; 14681, Second motor; 14682, Pulley assembly; 14683, Telescopic tube; 14684, Turntable; 14685, Protective box; 14686, Top plate; 14687, Fixed shaft; 14688, Connecting bar; 14689, Guide bar; 146810, Spring; 146811, Top shaft; 146812, Ball bearing; 146813, Guide ring; 147, Stabilizing structure; 1471, Connecting ring; 1472, Vertical rod; 1473, First guide plate; 1474, Display rack; 1475, Second guide plate; 1476, Clamping ring; 1477, Locking hole; 1478, Locking shaft; 1479, Moving block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0033] A pressurized linear pneumatic actuator, referenced Figure 1The device includes a valve body 1, with a valve stem 2 installed inside the upper end of the valve body 1. The valve stem 2 transmits external driving force to a valve disc 3. The lower end of the valve stem 2 is connected to the valve disc 3, which controls the opening and closing of the valve by contacting or separating from the sealing surface inside the valve body 1 through lifting and lowering movements. A first bracket 4 is fixedly installed on the upper external end of the valve body 1. The first bracket 4 supports and connects to a pneumatic actuator body 5, which is the power source of the actuator. A piston rod 6 is movably installed inside the actuator body 5, which outputs pneumatic thrust to the valve stem 2. A piston 7 is installed on the lower external end of the piston rod 6, which pushes the piston rod 6 to move linearly under air pressure. The piston rod 6 is coaxially connected to the top of the valve rod 2 to ensure the linearity and centering of power transmission. The upper end of the pneumatic actuator body 5 is bolted with a second bracket 8, which is used to install the handwheel assembly. The upper end of the second bracket 8 is equipped with a bearing 9, which is used to support the handwheel 10 and make it rotate smoothly. The handwheel 10 is used to manually drive the piston rod 6 in case of no air source or emergency. The upper middle part of the handwheel 10 is connected to a protective sleeve 11, which is used to accommodate and guide the lead screw 12. The bottom of the lead screw 12 is connected to a lead screw nut 13, and the lower end of the lead screw nut 13 is coaxially connected to the piston rod 6 to convert the rotational motion of the handwheel 10 into the linear motion of the piston rod 6. Reference Figure 2 The drive stabilizing assembly 14 includes a connecting seat 141, which is used to fix the entire assembly to the upper end of the pneumatic actuator body 5. A rotating rod 142 is rotatably connected to the middle of the upper end of the connecting seat 141. The rotating rod 142 is used to adjust the height by rotation. A first screw 143 is threadedly connected to the upper end of the rotating rod 142 for lifting adjustment. Telescopic support rods 144 are connected to both sides of the upper end of the connecting seat 141 to assist in supporting and maintaining the horizontal stability of the connecting cylinder 145. The upper ends of the first screw 143 and the telescopic support rods 144 are fixedly connected to the bottom of the connecting cylinder 145. The connecting cylinder 145 serves as the mounting base of the upper structure and is used to support the intermittent drive structure 146 and the stabilizing structure 147. By rotating the rotating rod 142, the extension length of the first screw 143 can be adjusted, thereby adjusting the height of the connecting cylinder 145 to adapt to the installation requirements under different working conditions.

[0034] The drive stabilizing component 14 is integrated into the upper part of the pneumatic actuator body 5, which can provide additional structural support and drive assistance during the operation of the actuator, thereby improving the overall stability and reliability of operation. The cooperation of the connecting seat 141, rotating rod 142, first screw 143 and telescopic support rod 144 makes the height of the connecting cylinder 145 adjustable to adapt to the installation and operation requirements under different working conditions.

[0035] Reference Figure 3The intermittent drive structure 146 includes a cylinder 1461, which is connected to the upper end of the connecting cylinder 145. The cylinder 1461 is used to house and protect the internal drive components. A first motor 1462 is installed inside the cylinder 1461, which provides lifting power. A second screw 1463 is connected to the top output end of the first motor 1462, which converts the rotational motion into linear motion. The upper end of the second screw 1463 is threadedly connected to a lifting rod 1464, which drives the rotary lifting structure 1468 to perform lifting motion. A stabilizing rod 1465 is fixed to the lower end of the lifting rod 1464, which prevents the lifting rod 1464 from deflecting during lifting. The stabilizing rod 1465 is locked inside the cylinder 1461 to ensure the linearity of the lifting motion. A limit cylinder 1466 is fixed in the middle of the upper end of the cylinder 1461, which guides the rotary lifting structure 1468. The rotational movement of the lifting structure 1468 is facilitated by a stabilizing frame 1467 at the upper end of the limiting cylinder 1466. The stabilizing frame 1467 further restricts the sway of the lifting rod 1464. The upper middle part of the stabilizing frame 1467 is in a limiting sliding fit with the lifting rod 1464 to ensure that the lifting rod 1464 only moves in a straight line. The upper end of the lifting rod 1464 is connected to the rotary lifting structure 1468, which generates intermittent lifting force. The rotary lifting structure 1468 is rotatably connected to the outer side of the limiting cylinder 1466 to achieve a combined rotational and lifting motion. That is, the intermittent drive structure 146 uses a first motor 1462 and a second screw 1463 to drive the lifting rod 1464, achieving precise control of the rotary lifting structure 1468. The design of the stabilizing rod 1465 and the limiting cylinder 1466 ensures the stability of the lifting process. The stabilizing frame 1467 further restricts the sway of the lifting rod 1464, improving the driving accuracy and structural rigidity.

[0036] The upper middle part of the stabilizing frame 1467 is cylindrical, and the inner two sides of the upper cylindrical part of the stabilizing frame 1467 are limited and slidably connected to the outer two sides of the lifting rod 1464. That is, the upper part of the stabilizing frame 1467 is cylindrical and is limited and slidably connected to the lifting rod 1464, which effectively prevents the lifting rod 1464 from rotating or deviating during the movement, and ensures the linearity and stability of the lifting action.

[0037] Reference Figure 4The rotating lifting structure 1468 includes a second motor 14681, which is mounted on the side of the cylinder 1461. Its top output end is connected to a pulley assembly 14682, which transmits torque and achieves speed reduction and torque increase. The pulley assembly 14682 has a left-larger, right-smaller structure. The left side is a limiting sleeve fitted on the outer side of the upper end of the limiting cylinder 1466, used to drive the limiting cylinder 1466 to rotate. Telescopic tubes 14683 are installed on both sides of the upper left side of the pulley assembly 14682. The telescopic tubes 14683 are used to connect to the turntable 14684 and adapt to height changes. The top of the telescopic tube 14683 is fixedly connected to the turntable 14684. The disc 14684 is used to drive the protective box 14685 to rotate. The protective box 14685 is used to house the lifting components and prevent interference. A top plate 14686 is provided at the upper end of the protective box 14685. A fixed shaft 14687 is locked at the lower end of the top plate 14686. The fixed shaft 14687 is used to install the connecting strip 14688. The connecting strip 14688 is used to connect the fixed shaft 14687 and the top shaft 146811 in series to achieve linkage. A guide strip 14689 is inserted into the middle of the connecting strip 14688. The guide strip 14689 is used to guide the sliding of the connecting strip 14688. A spring 146810 is sleeved on the upper outer side of the guide strip 14689. 0 is used to provide restoring force. A top shaft 146811 is movably inserted into one end of the connecting bar 14688 away from the fixed shaft 14687. The top shaft 146811 is used for intermittent ejection during rotation. A ball bearing 146812 is installed at the bottom of the top shaft 146811. The ball bearing 146812 reduces friction and slides along the guide ring 146813. The guide ring 146813 guides the top shaft 146811 in intermittent lifting and lowering motion. The bottom of the guide ring 146813 is locked to the lifting rod 1464, and the guide ring 146813 has an inclined ring structure with the right side higher than the left, so that the top shaft 146811 moves along the guide ring 14687 during rotation. 13. When sliding, intermittent lifting and lowering motion is generated, which in turn pushes the inner wall of the handwheel 10 intermittently through the top shaft 146811, realizing the intermittent rotation drive of the handwheel 10. That is, the rotating lifting structure 1468 drives the pulley group 14682 through the second motor 14681, which drives the limit cylinder 1466 and the turntable 14684 to rotate, realizing the composite motion of lifting and rotation. The cooperative design of the connecting bar 14688, the top shaft 146811 and the guide ring 146813 enables the top shaft 146811 to realize intermittent lifting action during the lifting and lowering process, ensuring intermittent contact with the inside of the handwheel 10 to drive rotation, so as to meet the intermittent transmission movement of the valve stem 2 and the piston rod 6.

[0038] Reference Figures 5-7The stabilizing structure 147 includes a docking ring 1471, which is sleeved and locked to both sides of the outer end of the connecting cylinder 145. A vertical rod 1472 is installed between the two docking rings 1471, which supports and guides the moving block 1479. A first guide plate 1473 is fixed to the side of the docking ring 1471, which is rotatably connected to the display frame 1474. The display frame 1474 supports the clamping ring 1476 and enables multi-directional adjustment. The other side of the display frame 1474 is connected to a second guide plate 1475, which has a clamping ring 1476 fixed to its exterior. The clamping ring 1476 is used to clamp the lead screw 12, enhancing the stability of the lead screw 12's adjustment and movement. Locking holes 1477 are equidistantly opened on the exterior of the vertical rod 1472, which are used to cooperate with the locking shaft 1478 to achieve position locking. The locking shaft 1478 is threaded and locked to the vertical rod 1472. On the right side of the movable block 1479, the position of the movable block 1479 is fixed. The movable block 1479 is slidably sleeved on the outside of the vertical rod 1472 to adjust the unfolding angle of the display frame 1474. The other end of the movable block 1479 is rotatably connected to one side of the lower end of the display frame 1474. By sliding the movable block 1479 and locking the locking shaft 1478, the unfolding angle of the display frame 1474 can be adjusted, thereby adjusting the position of the clamping ring 1476 so that it is clamped on the lead screw 12, improving the overall stability of the piston rod 6 during subsequent movement. That is, the stabilizing structure 147 forms an adjustable support frame through the cooperation of the docking ring 1471, the vertical rod 1472 and the display frame 1474. The movable block 1479 slides along the vertical rod 1472 and is locked by the locking shaft 1478, which facilitates the adjustment of the position of the clamping ring 1476 according to the actual working conditions, and improves the stability of the piston rod 6 adjustment movement.

[0039] Among them, the display stand 1474 is set in a cross-shaped frame, that is, the display stand 1474 adopts a cross-shaped frame structure, which has good mechanical support performance, can maintain stability under multi-directional stress conditions, and is suitable for support and adjustment needs under complex working conditions.

[0040] The upper left and right sides and the lower left and right sides of the display stand 1474 are rotatably connected to the first guide plate 1473 and the second guide plate 1475 respectively. That is, the upper and lower ends of the display stand 1474 are connected to the first guide plate 1473 and the second guide plate 1475 in a combination of rotatable and sliding connection, which not only ensures the flexibility of the structure, but also improves the adjustment range and adaptability, making it convenient for on-site installation and debugging.

[0041] The implementation principle of this application embodiment is as follows: First, when the system receives a command to open or close the valve, the first motor 1462 starts first, preparing for subsequent intermittent drive actions; Next, the first motor 1462 is installed inside the cylinder 1461, and its top output end is connected to the second screw 1463. The second screw 1463 is threadedly engaged with the lifting rod 1464, and the lower end of the lifting rod 1464 is locked inside the cylinder 1461 by the stabilizing rod 1465, so that it can only move axially and cannot rotate. Therefore, when the first motor 1462 drives the second screw 1463 to rotate, the lifting rod 1464 achieves precise lifting and lowering movement. The upper end of the lifting rod 1464 passes through the limiting cylinder 1466 and is limited and slidably engaged with the stabilizing frame 1467 to ensure the absolute linearity of the lifting process. In this way, the rotating lifting structure 1468 is adjusted to a height position that matches the inner wall of the handwheel 10, establishing the correct initial gap for subsequent intermittent pushing. Subsequently, after the lifting rod 1464 completes height positioning, the second motor 14681 begins to work. The second motor 14681 is installed on the side of the cylinder 1461, and its output end is connected to the outer side of the upper end of the limiting cylinder 1466 through the pulley group 14682. Since the pulley group 14682 adopts a structure design with a larger left side and a smaller right side, it can effectively increase the output torque. When the second motor 14681 rotates, the power is transmitted to the telescopic tube 14683 through the pulley group 14682, which in turn drives the turntable 14684 connected to the top of the telescopic tube 14683 and the entire protective box 14685 to rotate together. At this time, the rotational motion is combined with the previously set lifting position to form the basis of the compound motion. Based on this, as the protective box 14685 rotates, the top plate 14686 at its upper inner end will drive the connecting bar 14688, which is externally connected via the fixed shaft 14687, to rotate synchronously. Since one end of the connecting bar 14688 is inserted into the top shaft 146811, and the bottom of the top shaft 146811 is fitted with ball bearings 146812, when the top shaft 146811 rotates, the ball bearings 146812 always abut against the upper surface of the guide ring 146813 below. The bottom of the guide ring 146813 is locked to the lifting rod 1464, thus keeping the guide ring 146813 in a fixed state. Because the guide ring 146813 is designed as an inclined ring structure with the right side higher than the left, when the protective box 14685 drives the top shaft 146811 to rotate around the guide ring... When the ring 146813 rotates circumferentially, the ball 146812 slides along the inclined guide ring 146813 surface, forcing the top shaft 146811 to generate periodic lifting and lowering motion during one rotation. Thus, the ejected top shaft 146811 will directly act on the inside of the handwheel 10, that is, intermittently push the handwheel 10 to rotate a small angle. When the top shaft 146811 descends, it will disengage from the handwheel 10 and wait for the next lifting cycle. This intermittent pushing method realizes the step-by-step rotation of the handwheel 10, so that the handwheel 10 drives the lead screw 12 to rotate synchronously through the cooperation of the bearing 9, thereby converting the rotational motion of the lead screw 12 into the linear motion of the piston rod 6, realizing the convenient adjustment and movement of the piston rod 6 and the valve rod 2 without the need for an external fixed and bulky air pressure station. In addition, during the linear motion of the piston rod 6, the stabilizing structure 147 provides support and protection simultaneously. When the moving block 1479 slides, the unfolding angle of the display frame 1474 can be adjusted so that the clamping ring 1476 is clamped on the outside of the lead screw 12. This effectively suppresses the radial sway of the lead screw 12 during the transmission process and ensures that the piston rod 6 can move smoothly in a straight line. Finally, the linear motion of the piston rod 6 is transmitted to the valve rod 2, which is coaxially connected to it. The valve rod 2 drives the lower valve disc 3 to rise and fall, so that the valve disc 3 contacts or separates from the sealing surface inside the valve body 1, thereby realizing the closing or opening of the valve. The entire process, from motor start-up, height adjustment, intermittent rotation drive, motion conversion to the final valve action, is completed independently by the actuator's integrated drive stabilizing component 14. There is no need for an external bulky high-pressure air station. Only a low-pressure power supply is needed to achieve precise valve control, effectively solving the problem of traditional pneumatic actuators' dependence on a fixed high-pressure air source.

Claims

1. A pressurized linear pneumatic actuator, comprising a valve body (1), wherein a valve stem (2) is installed inside the upper end of the valve body (1), and a valve disc (3) is connected to the lower end of the valve stem (2), and the exterior of the valve disc (3) is sealed against the interior of the valve body (1); a first bracket (4) is provided outside the upper end of the valve body (1), and a pneumatic actuator body (5) is connected to the upper end of the first bracket (4); a piston rod (6) is movably inserted inside the pneumatic actuator body (5); a piston (7) is installed outside the lower end of the piston rod (6), and the piston rod (6) and the valve stem (2) are connected... The pneumatic actuator body (5) is bolted to a second bracket (8) at the top, and a bearing (9) is installed inside the upper end of the second bracket (8). The bearing (9) is connected to the middle of the handwheel (10). The handwheel (10) is located at the upper end of the second bracket (8), and a protective sleeve (11) is connected to the upper end of the middle of the handwheel (10). A lead screw (12) is inserted inside the protective sleeve (11). A lead screw nut (13) is connected to the bottom of the lead screw (12), and the lower end of the lead screw nut (13) is coaxially connected to the piston rod (6). The characteristic of this design is that... It also includes a drive stabilizing assembly (14) that is connected to the outer side of the upper end of the pneumatic actuator body (5). The drive stabilizing assembly (14) includes a connecting seat (141). The connecting seat (141) is bolted to the outer side of the upper end of the pneumatic actuator body (5). A rotating rod (142) is rotatably connected to the middle of the upper end of the connecting seat (141). A first screw (143) is threaded to the upper end of the rotating rod (142). Telescopic support rods (144) are connected to both sides of the upper end of the connecting seat (141). The upper ends of the first screw (143) and the telescopic support rods (144) are connected to the bottom of the connecting cylinder (145). An intermittent drive structure (146) is provided at the upper end of the connecting cylinder (145), and a stabilizing structure (147) is provided on the outside of the connecting cylinder (145).

2. A pressurized linear pneumatic actuator according to claim 1, characterized in that, The intermittent drive structure (146) includes a cylinder (1461) which is connected to the upper end of a connecting cylinder (145). A first motor (1462) is installed inside the cylinder (1461). A second screw (1463) is connected to the top output end of the first motor (1462). The upper end of the second screw (1463) is threadedly connected to a lifting rod (1464). A stabilizing rod (1465) is connected to the lower end of the lifting rod (1464). The stabilizing rod (1465) is locked inside the cylinder (1461). A limiting cylinder (1466) is fixed in the middle of the upper end of the cylinder (1461). A stabilizing frame (1467) is provided at the upper end of the limiting cylinder (1466). The middle of the upper end of the stabilizing frame (1467) is connected to the lifting rod (1464). The upper end of the lifting rod (1464) is connected to the rotating lifting structure (1468). The rotating lifting structure (1468) is connected to the outside of the limiting cylinder (1466).

3. A pressurized linear pneumatic actuator according to claim 2, characterized in that, The rotating lifting structure (1468) includes a second motor (14681), which is installed on the side of the cylinder (1461). The top output end of the second motor (14681) is connected to a pulley assembly (14682). The left side of the pulley assembly (14682) is rotatably connected to the outside of the limiting cylinder (1466). Telescopic tubes (14683) are installed on both sides of the upper left side of the pulley assembly (14682), and the tops of the telescopic tubes (14683) on both sides are connected to a turntable (14684). The turntable (14684) is fixed to the bottom of the protective box (14685). The upper part of the protective box (14685) is provided with a top plate (14686). The top plate (14686) has a fixed shaft (14687) locked at the lower end. A connecting strip (14688) is slidably installed on the outside of the fixed shaft (14687). A guide strip (14689) is inserted into the middle of the connecting strip (14688). A spring (146810) is provided on the outside of the upper end of the guide strip (14689). A top shaft (146811) is movably inserted at the end of the connecting strip (14688) away from the fixed shaft (14687). A ball bearing (146812) is installed at the bottom of the top shaft (146811). The bottom of the ball bearing (146812) abuts against the guide ring (146813). The bottom of the guide ring (146813) is locked to the lifting rod (1464).

4. A pressurized linear pneumatic actuator according to claim 1, characterized in that, The stabilizing structure (147) includes a docking ring (1471), which is sleeved and locked to both sides of the outer end of the connecting cylinder (145). A vertical rod (1472) is installed between the sides of the docking rings (1471) on both sides, and a first guide plate (1473) is fixed to the sides of the docking rings (1471) on both sides. The interior of the first guide plate (1473) is connected to one side of the display frame (1474), and the other side of the display frame (1474) is connected to the second guide plate (1475). The second guide plate (1475) is fixed with a clamping ring (1476) on the outside. The vertical rod (1472) is provided with lock holes (1477) at equal intervals on the outside. A lock shaft (1478) is inserted into the lock hole (1477). The lock shaft (1478) is installed at one end of the moving block (1479). The moving block (1479) is slidably sleeved on the outside of the vertical rod (1472). The other end of the moving block (1479) is rotatably connected to one side of the lower end of the display frame (1474).

5. A pressurized linear pneumatic actuator according to claim 2, characterized in that, The upper middle part of the stabilizing frame (1467) is cylindrical, and the inner two sides of the upper cylindrical part of the stabilizing frame (1467) are limited and slidably connected to the outer two sides of the lifting rod (1464).

6. A pressurized linear pneumatic actuator according to claim 3, characterized in that, The pulley assembly (14682) is arranged in the shape of a larger pulley on the left and a smaller pulley on the right, and the pulley assembly (14682) on the left side is limited and sleeved on the outer side of the upper end of the limiting cylinder (1466).

7. A pressurized linear pneumatic actuator according to claim 3, characterized in that, The connecting bar (14688) is connected in series with the fixed shaft (14687) and the top shaft (146811), and the fixed shaft (14687), the connecting bar (14688) and the guide bar (14689) rotate around the upper circumference of the guide ring (146813).

8. A pressurized linear pneumatic actuator according to claim 3, characterized in that, The guide ring (146813) is higher on the right side than on the left side, and the guide ring (146813) is locked in a fixed state by the lifting rod (1464).

9. A pressurized linear pneumatic actuator according to claim 4, characterized in that, The display stand (1474) is arranged in a cross-shaped frame.

10. A pressurized linear pneumatic actuator according to claim 4, characterized in that, The upper left and right sides and the lower left and right sides of the display stand (1474) are rotatably connected to the first guide plate (1473) and the second guide plate (1475) respectively.

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