Pneumatic actuator servicing device

Abstract

The application provides a kind of pneumatic actuator maintenance device, comprising: working frame;Driving structure is arranged on the working frame, and the driving structure is used to drive the rotation of pneumatic actuator;Cutting device is laterally movably arranged on the working frame, and the cutting device is used to cut the pneumatic actuator;Welding device is adjustably arranged on the working frame, and the welding device is used to weld the cut pneumatic actuator.The technical scheme of the application effectively solves the problem of high cost of maintenance of pneumatic actuator in related art.

Description

Technical Field

[0001] This invention relates to the field of pneumatic actuator repair technology, and more specifically, to a pneumatic actuator repair device. Background Technology

[0002] Currently, food companies have a large number of food-grade anti-mixing valves, single-seat valves, and butterfly valves. These valves are all equipped with pneumatic actuators. In actual use, after 6 to 10 years, the pneumatic actuators will leak due to wear and tear on their internal structure. The valves mentioned above will fail to open due to the damage to the pneumatic actuators, causing production line shutdowns and affecting production schedules or efficiency. Most of these pneumatic actuators are purchased from abroad, and they are integrally molded devices, so they can only be replaced as a whole after damage, resulting in high maintenance costs. Summary of the Invention

[0003] The main objective of this invention is to provide a pneumatic actuator repair device to solve the problem of high repair costs for pneumatic actuators in related technologies.

[0004] To achieve the above objectives, according to one aspect of the present invention, a pneumatic actuator repair device is provided, comprising: a work frame; a drive structure disposed on the work frame for driving the pneumatic actuator to rotate; a cutting device laterally movably disposed on the work frame for cutting the pneumatic actuator; and a welding device positionably disposed on the work frame for welding the cut pneumatic actuator.

[0005] Furthermore, the drive structure includes a motor mounted on the work frame, a vertical shaft driven by the motor, and a turntable connected to the vertical shaft. The motor can drive the vertical shaft to rotate, so that the vertical shaft drives the turntable to rotate, so that the turntable drives the pneumatic actuator to rotate.

[0006] Furthermore, the drive structure also includes multiple trays, each with a different diameter, and each tray is detachably mounted on the turntable. A pneumatic actuator is mounted on one of the multiple trays so that the turntable drives the pneumatic actuator to rotate via the tray.

[0007] Furthermore, the pneumatic actuator maintenance device also includes a pressing device mounted on the work frame, which is located directly above the drive structure and is used to engage with the pneumatic actuator.

[0008] Furthermore, the extrusion device includes a cylinder, a piston rod movably mounted on the cylinder, and a pressure plate rotatably mounted on the end of the piston rod. The pressure plate is located directly above the drive structure and engages with the pneumatic actuator.

[0009] Furthermore, the pneumatic actuator maintenance device also includes multiple positioning plates, which are spaced apart circumferentially along the pressure plate, and each positioning plate is adjustable in position along the axial direction of the pressure plate. A radial limiting space is formed between the multiple positioning plates, and the pneumatic actuator is confined within the radial limiting space.

[0010] Furthermore, the cutting device is movably mounted on the work frame via a first adjusting frame. The first adjusting frame includes a first mounting part movably mounted on the work frame and a first clamping part movably mounted on the first mounting part. The first clamping part fixes the cutting device on the first mounting part. The work frame is also provided with a rotatable operating lever. When the operating lever rotates, it drives the first mounting part to reciprocate. A slide rail and a slide groove that slides with the slide rail are provided between the first mounting part and the work frame.

[0011] Furthermore, the welding device is adjustablely mounted on the work stand via a second adjusting frame. The second adjusting frame includes a second mounting part mounted on the work stand and a second clamping part adjustable in angle on the second mounting part. The second clamping part clamps the welding device.

[0012] Furthermore, the pneumatic actuator repair device also includes a cooling structure mounted on the work frame, the cooling structure including a cooling port facing the welded position on the pneumatic actuator; and / or, the pneumatic actuator repair device also includes a dust removal device, the dust removal device including a vacuum cleaner mounted on the work frame and a vacuum pipe connected to the vacuum cleaner, the nozzle of the vacuum pipe facing the position of the pneumatic actuator to be cut.

[0013] Furthermore, the pneumatic actuator maintenance device also includes a detection device mounted on the work stand. The detection device includes a mounting base mounted on the work stand, a clamping structure mounted on the mounting base, an air supply line mounted on the work stand, and a counting sensor mounted on the mounting base. The clamping structure fixes the pneumatic actuator to the mounting base, and the counting sensor is used to detect the number of times the pneumatic actuator operates.

[0014] The pneumatic actuator repair device according to the technical solution of this invention includes: a work frame, a drive structure, a cutting device, and a welding device. The drive structure is mounted on the work frame and is used to drive the pneumatic actuator to rotate. The cutting device is laterally movably mounted on the work frame and is used to cut the pneumatic actuator. The welding device is positionally adjustable on the work frame and is used to weld the cut pneumatic actuator. In this way, the cutting device moves to a position capable of cutting the pneumatic actuator to perform a lateral cut, opening the actuator and repairing its internal components. After repair, the welding device welds the repaired and cut pneumatic actuator back together, restoring it to its original state. Thus, the pneumatic actuator repaired by this device can be used normally without requiring complete replacement, reducing repair costs and achieving cost savings. Therefore, the technical solution of this application effectively solves the problem of high repair costs for pneumatic actuators in related technologies. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the pneumatic actuator repair device according to the present invention is shown;

[0017] Figure 2 It shows Figure 1 An enlarged schematic diagram of the first position inside the pneumatic actuator maintenance device;

[0018] Figure 3 It shows Figure 1 An enlarged schematic diagram of the extrusion device inside the pneumatic actuator repair device;

[0019] Figure 4 It shows Figure 1 An enlarged schematic diagram of the second position inside the pneumatic actuator maintenance device;

[0020] Figure 5 It shows Figure 1 An enlarged schematic diagram of the side of the first adjustment frame inside the pneumatic actuator maintenance device;

[0021] Figure 6 It shows Figure 1 An enlarged schematic diagram of the second adjustment frame inside the pneumatic actuator maintenance device;

[0022] Figure 7 It shows Figure 1An enlarged schematic diagram of the third position inside the pneumatic actuator maintenance device;

[0023] Figure 8 It shows Figure 1 An enlarged schematic diagram of the first position at the bottom of the interior of the pneumatic actuator maintenance device;

[0024] Figure 9 It shows Figure 1 An enlarged schematic diagram of the second position below the interior of the pneumatic actuator repair device;

[0025] Figure 10 It shows Figure 1 An enlarged schematic diagram of the pneumatic actuator after it has been cut open in the pneumatic actuator repair device;

[0026] Figure 11 It shows Figure 1 An enlarged schematic diagram of the pneumatic actuator reinstallation process using a pneumatic actuator repair device;

[0027] Figure 12 It shows Figure 1 An enlarged schematic diagram of the internal testing device of the pneumatic actuator repair equipment;

[0028] Figure 13 It shows Figure 1 A schematic diagram of the internal structure of a pneumatic actuator;

[0029] Figure 14 It shows Figure 1 A partially enlarged schematic diagram of the exterior of the pneumatic actuator maintenance device.

[0030] The above figures include the following reference numerals:

[0031] 1. Pneumatic actuator; 101. Upper split component; 102. Lower split component; 2. Spring; 3. Sealing gasket; 10. Work frame;

[0032] 20. Drive structure; 21. Vertical shaft; 22. Turntable; 23. Tray; 24. Motor;

[0033] 30. Cutting device;

[0034] 40. Welding equipment;

[0035] 50. Extrusion device; 51. Cylinder body; 52. Piston rod; 53. Pressure plate; 54. Positioning plate;

[0036] 61. First adjusting frame; 611. First mounting part; 612. First clamping part; 62. Operating lever; 631. Slide rail; 632. Slide groove; 64. Second adjusting frame; 641. Second mounting part; 642. Second clamping part;

[0037] 71. Cooling structure; 711. Cooling port; 72. Dust removal device; 721. Vacuum cleaner; 722. Suction pipe; 73. Detection device; 731. Mounting base; 732. Clamping structure; 733. Air supply pipeline; 734. Counting sensor;

[0038] 80. Control box. Detailed Implementation

[0039] 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 some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] According to one aspect of this application, a pneumatic actuator maintenance device is provided, such as... Figures 1 to 14As shown, an embodiment of the pneumatic actuator repair device includes: a work frame 10, a drive structure 20, a cutting device 30, and a welding device 40. The drive structure 20 is mounted on the work frame 10 and is used to drive the pneumatic actuator 1 to rotate. The cutting device 30 is laterally movably mounted on the work frame 10 and is used to cut the pneumatic actuator 1. The welding device 40 is positionally adjustable on the work frame 10 and is used to weld the cut pneumatic actuator 1.

[0043] The technical solution of the embodiment of the pneumatic actuator repair device involves moving the cutting device 30 to a position capable of cutting the pneumatic actuator 1 laterally, cutting the pneumatic actuator 1 open, and repairing the internal components. After repair, the repaired and cut pneumatic actuator 1 is welded together by the welding device 40, restoring the pneumatic actuator 1 to its original state. Thus, the pneumatic actuator 1 repaired by the pneumatic actuator repair device can be used normally without the need for complete replacement, reducing repair costs and achieving the goal of saving maintenance costs. Therefore, the technical solution of the embodiment of the pneumatic actuator repair device effectively solves the problem of high repair costs for pneumatic actuators in related technologies.

[0044] like Figures 1 to 14 As shown, the drive structure 20 includes a motor 24 mounted on the work frame 10, a vertical shaft 21 driven by the motor 24, and a turntable 22 connected to the vertical shaft 21. The motor 24 can drive the vertical shaft 21 to rotate, which in turn drives the turntable 22 to rotate, which in turn drives the pneumatic actuator 1 to rotate. The motor 24 rotates the vertical shaft 21, which in turn drives the turntable 22 to rotate, thus realizing the rotation of the pneumatic actuator 1. This design not only ensures the stability and accuracy of the pneumatic actuator 1 during maintenance, but also enhances the power efficiency and reliability of the actuator's rotation process due to its direct drive force transmission. Furthermore, the linkage mechanism between the vertical shaft 21 and the turntable 22 can better adapt to the rotational needs of the pneumatic actuator 1, especially during the cutting and welding stages, providing necessary rotational control to ensure the safety and accuracy of the pneumatic actuator 1 during maintenance.

[0045] like Figures 1 to 14As shown, the drive structure 20 also includes multiple trays 23, each with a different diameter, and each tray 23 is detachably mounted on a turntable 22. A pneumatic actuator 1 is mounted on one of the trays 23, allowing the turntable 22 to drive the pneumatic actuator 1 to rotate via the tray 23. The pneumatic actuator 1 can be mounted on any one of the trays 23, thus rotating via the selected tray 23 when the turntable 22 rotates. This design ensures that the pneumatic actuator maintenance device can accommodate pneumatic actuators 1 of various diameters, enhancing the versatility and adaptability of the equipment. By changing the trays 23 of different diameters, the pneumatic actuator maintenance device can easily handle pneumatic actuators 1 of various sizes without requiring a dedicated drive structure 20 for each diameter, thereby simplifying the maintenance process and further reducing maintenance costs.

[0046] like Figures 1 to 14 As shown, the pneumatic actuator repair device also includes a pressing device 50 mounted on the work frame 10. The pressing device 50 is located directly above the drive structure 20 and is used to engage with the pneumatic actuator 1. By applying directional pressure to the pneumatic actuator 1 through the pressing device 50, additional fixing action can be provided during cutting and welding, ensuring that the pneumatic actuator 1 remains stable during operation and avoiding displacement caused by external forces, thereby improving operational accuracy. This design not only helps maintain the positional stability of the pneumatic actuator 1, but also ensures accurate overlap of the welded parts when precisely aligning the pneumatic actuator 1 after cutting, providing a reliable foundation for subsequent welding work. When working in conjunction with the drive structure 20, the pressing device 50 can significantly enhance the safety and reliability of the repair process, reduce operational errors, improve repair efficiency, and ultimately achieve effective repair of the pneumatic actuator 1.

[0047] Specifically, the pneumatic actuator 1 contains a spring 2 and a sealing gasket 3. The extrusion device 50 applies directional pressure to the pneumatic actuator 1, overcoming the elastic force of the spring 2, thus facilitating a smooth, transverse, complete cut of the pneumatic actuator 1. Furthermore, when welding the repaired and cut pneumatic actuator 1, the extrusion device 50 applies directional pressure to overcome the elastic force of the spring 2, facilitating smooth welding of the pneumatic actuator 1 and allowing it to be restored to its original state. The pneumatic actuator 1 also includes a housing that accommodates the spring 2 and the sealing gasket 3, and a main shaft passing through the housing, which passes through the spring 2 and the sealing gasket 3.

[0048] like Figures 1 to 14As shown, the extrusion device 50 includes a cylinder 51, a piston rod 52 movably mounted on the cylinder 51, and a pressure plate 53 rotatably sleeved on the end of the piston rod 52. The pressure plate 53 is located directly above the drive structure 20 and abuts against the pneumatic actuator 1. The piston rod 52 is extended and retracted by external power, thereby causing the pressure plate 53 to move up and down. The pressure plate 53, located directly above the drive structure 20 and in contact with the pneumatic actuator 1, is designed to be rotatable so that it can rotate synchronously with the pneumatic actuator 1 while applying pressure, ensuring that the pressure is evenly distributed across the entire contact surface. This configuration not only helps to precisely fix the pneumatic actuator 1 during maintenance but also provides additional support and positioning during cutting or welding, preventing the pneumatic actuator 1 from shifting due to unbalanced forces generated by rotation, thus ensuring the quality and precision of cutting and welding.

[0049] like Figures 1 to 14 As shown, the pneumatic actuator repair device also includes multiple positioning plates 54. These positioning plates 54 are spaced apart circumferentially along the pressure plate 53, and each positioning plate 54 is adjustable in position along the axial direction of the pressure plate 53. A radial limiting space is formed between the multiple positioning plates 54, confining the pneumatic actuator 1 within this space. This radial limiting space can precisely position and fix pneumatic actuators 1 of different sizes. This design allows the pneumatic actuator 1 to maintain a stable position during repair, enhancing both safety and accuracy. The adjustable nature of the positioning plates 54 means that the pneumatic actuator repair device can accommodate various models of pneumatic actuators 1, enhancing its versatility and applicability. The radial limiting of the pneumatic actuator 1 by the positioning plates 54 ensures accurate alignment during welding operations, preventing damage caused by positional misalignment and thus guaranteeing repair quality.

[0050] Specifically, the positioning plate 54 is provided with a first through hole along the axial direction of the pressure plate 53, and the position of each positioning plate 54 can be adjusted along the axial direction of the pressure plate 53 by means of bolts along the first through hole.

[0051] Specifically, the pneumatic actuator 1 is cut into an upper split part 101 and a lower split part 102 by the cutting device 30. After replacing any damaged parts such as the spring and sealing gasket inside the pneumatic actuator 1, the upper split part 101 is positioned within the radial limiting space formed between multiple positioning plates 54. Under the action of the upper end of the spring, the upper split part 101 is pushed against the upper part of the radial limiting space. At the same time, the lower split part 102 is installed on the turntable 22 and is also positioned within the radial limiting space formed between multiple positioning plates 54. Under the action of the lower end of the spring, the lower split part 102 is pushed against the turntable 22. In this way, both the upper split part 101 and the lower split part 102 are restricted within the radial limiting space, preventing radial displacement. However, they are allowed to move axially to meet the alignment requirements. Furthermore, when the pressure plate 53 moves downward, it can push the upper split part 101 downward so that the lower split part 102 can close together. During the process of the upper split part 101 closing with the lower split part 102, both the upper split part 101 and the lower split part 102 are restricted within the radial limiting space. Multiple positioning plates 54 move downward relative to the lower split part 102, which guides the downward movement of the upper split part 101, making it easy for the upper split part 101 and the lower split part 102 to close smoothly and meet the alignment requirements.

[0052] like Figures 1 to 14 As shown, the cutting device 30 is movably mounted on the work frame 10 via a first adjusting frame 61. The first adjusting frame 61 includes a first mounting part 611 movably mounted on the work frame 10 and a first clamping part 612 movably mounted on the first mounting part 611. The first clamping part 612 fixes the cutting device 30 to the first mounting part 611. The work frame 10 is also provided with a rotatable operating lever 62. When the operating lever 62 rotates, it drives the first mounting part 611 to reciprocate. A slide rail 631 and a sliding groove 632 that slidably engages with the slide rail 631 are provided between the first mounting part 611 and the work frame 10. When the operating lever 62 rotates, it drives the first mounting part 611 to reciprocate along a preset direction via the sliding groove 632 that slidably engages with the slide rail 631, thereby enabling the cutting device 30 to perform precise cutting at different positions of the pneumatic actuator 1. This design achieves flexible positioning and stable operation of the cutting device 30, ensuring accuracy and safety during the cutting process. When the cutting device 30 needs to be moved to a specific position to perform a cutting operation on the pneumatic actuator 1, the operator can control the movement of the first mounting part 611 by rotating the operating lever 62, thereby adjusting the position of the cutting device 30 and completing the precise cutting task. Both the slide rail 631 and the slide groove 632 mentioned above are linear.

[0053] The slide rail 631 is mounted on the work frame 10, and the slide groove 632 is mounted on the first mounting part 611. The first mounting part 611 includes a fixed platform, a pair of upright plates spaced apart on the fixed platform, and a pair of support plates adjustable in angle on the pair of upright plates. The first clamping part 612 includes a pair of jaws, each jaw being movably mounted on each upright plate. The pair of support plates can support the bottom of the end of the cutting device 30, and the pair of jaws fixes the cutting device 30 to the pair of support plates.

[0054] The cutting device 30 is preferably a grinding wheel cutter, i.e., an angle grinder.

[0055] like Figures 1 to 14 As shown, the welding device 40 is adjustablely mounted on the work frame 10 via a second adjusting frame 64. The second adjusting frame 64 includes a second mounting portion 641 mounted on the work frame 10 and a second clamping portion 642 adjustable in angle on the second mounting portion 641. The second clamping portion 642 clamps the welding device 40. The adjustable angle of the second clamping portion 642 on the second mounting portion 641 allows the welding device 40 to be precisely clamped and positioned at multiple angles. This design allows maintenance personnel to flexibly adjust the angle of the welding device 40 according to the specific needs of the pneumatic actuator 1, accurately aligning it with the part to be welded, ensuring welding quality and efficiency. The adjustable angle also means that the device can adapt to pneumatic actuators 1 of different models and sizes, thereby enhancing the versatility and adaptability of the pneumatic actuator maintenance device.

[0056] The second mounting part 641 includes a stand adjustable on the work frame 10. The second clamping part 642 includes a pair of clamping arms stacked on top of each other. The first ends of the pair of clamping arms are adjustable on the stand via a first bolt. The stand has a first vertical groove. The first bolt passes through the first ends of the pair of clamping arms and connects to the first vertical groove. When the first bolt is loosened, it moves the pair of clamping arms up and down along the first vertical groove to adjust their vertical position. After the vertical position is adjusted, the angle of the pair of clamping arms is adjusted with the axis of the first bolt as the rotation center. After the angle is adjusted, the first bolt is tightened to keep the pair of clamping arms in the adjusted position. The welding device 40 is clamped between the second ends of the pair of clamping arms via a second bolt. When the second bolt is loosened, the welding device 40 can be removed from between the pair of clamping arms or its installation position can be adjusted. When the second bolt is tightened, the second ends of the pair of clamping arms can clamp the welding device 40.

[0057] like Figures 1 to 14As shown, the pneumatic actuator repair device also includes a cooling structure 71 mounted on the work frame 10. The cooling structure 71 includes a cooling port 711, which faces the welded area on the pneumatic actuator 1. The pneumatic actuator repair device also includes a dust removal device 72, which includes a vacuum cleaner 721 mounted on the work frame 10 and a suction pipe 722 connected to the vacuum cleaner 721. The opening of the suction pipe 722 faces the area to be cut on the pneumatic actuator 1. By directly aligning the cooling port 711 with the welded area of ​​the pneumatic actuator 1, the weld point can be quickly cooled after welding, shortening the cooling waiting time during the repair process, accelerating the overall repair speed, and also helping to reduce potential damage to the internal components of the pneumatic actuator 1 caused by high temperatures, ensuring that the pneumatic actuator 1 can quickly return to working condition after repair. The dust removal device 72 includes a vacuum cleaner 721 and a suction pipe 722. The nozzle of the suction pipe 722 is precisely aligned with the position of the pneumatic actuator 1 to be cut, which can instantly remove dust and debris generated during the cutting process. This provides a clean working environment for subsequent maintenance and welding work, avoiding the impact of dust on cutting accuracy and welding quality, thereby improving the overall performance of the maintenance device and making the maintenance process more environmentally friendly and efficient. The dust removal device 72 is a dust collector. The welded position is the weld joint where the upper and lower split parts are welded together, as described below.

[0058] like Figures 1 to 14 As shown, the pneumatic actuator maintenance device also includes a testing device 73 mounted on the workbench 10. The testing device 73 includes a mounting base 731 mounted on the workbench 10, a clamping structure 732 mounted on the mounting base 731, an air supply line 733 mounted on the workbench 10, and a counting sensor 734 mounted on the mounting base 731. The clamping structure 732 secures the pneumatic actuator 1 to the mounting base 731, and the counting sensor 734 detects the number of operations performed by the pneumatic actuator 1. The clamping structure 732 on the mounting base 731 securely fixes the pneumatic actuator 1 in the testing position, while the air supply line 733 provides the necessary air supply for the pneumatic actuator 1. The counting sensor 734 accurately records the number of operations performed by the pneumatic actuator 1 during the test. This design effectively evaluates the performance and durability of the pneumatic actuator 1, providing reliable data support for subsequent use and maintenance. After the pneumatic actuator 1 passes the test by the testing device 73, it can be installed on equipment for use, achieving significant savings in maintenance costs.

[0059] The work frame 10 consists of a two-layer main body frame with a stainless steel plate installed at the rear and acrylic plates surrounding the other three sides, so that the internal working conditions can be observed.

[0060] The drive structure 20 also includes a reducer connected to the motor, and the vertical shaft is connected to the reducer. The diameter of the pneumatic actuator can be selected on the tray according to different sizes.

[0061] The extrusion device 50 is a hydraulic unit. The hydraulic unit can adopt a hydraulic straightening device as disclosed in the authorized publication number CN204503845U. The hydraulic straightening device includes a machine body and a cylinder. The machine body is a hydraulic press, and the cylinder is a 40-ton hydraulic cylinder as the power source. A pressure plate is installed at the lower part of the hydraulic cylinder. The pressure plate and the pressure bearing are installed together with screws and fitted on the piston rod of the hydraulic cylinder and fixed with set screws. There are also 3 limit screws on the pressure plate for limiting the cylinder actuator.

[0062] The cutting device 30 also includes a linear bearing, which is mounted on the first mounting part 611. A guide shaft that mates with the linear bearing is provided on the work frame 10 to allow the first mounting part 611 to move smoothly in a straight line along the axis of the linear bearing. The operating lever 62 preferably includes an operating handle and a fine-tuning screw connected to the operating handle. The fine-tuning screw has a digital scale for more precise cutting. An angle grinder is fixed on the first mounting part 611. The angle grinder can be adjusted to various angles to use different actuators. The moving mechanism has good stability. During cutting, a large amount of dust is generated, so a dust collector is installed inside the work frame. The dust collector inlet adopts a multi-joint design, allowing for dust removal from the workpiece according to different positions and angles. The dust removal device 72 also includes a filter screen located at the connection between the vacuum cleaner 721 and the suction pipe 722. The filter screen has a mesh size of approximately 200 mesh for filtration. The vacuum cleaner 721 includes a cloth bag. The aforementioned operating handle is designed to facilitate operation of the operating lever 62 by maintenance personnel, allowing the fine-tuning screw to rotate. The operating handle is preferably a crank handle.

[0063] The cooling structure 71 is preferably an exhaust fan. The welding device is an argon arc welding machine and a welding torch. The argon arc welding machine is the main body, and the welding torch is fixed on the second adjustment frame 64. The second adjustment frame 64 is used to adjust the position of the welding torch. When the welding is completed, the pneumatic actuator will have a lot of heat, so a cooling structure 71 is installed on one side of the welding torch for cooling. The cooling structure 71 uses compressed air of about 6 bar to blow onto the weld joint on the pneumatic actuator through the cooling port 711. The cooling structure 71 automatically shuts off after the set time is reached.

[0064] Two clamping structures 732 are mounted on the mounting base 731, each of which is a cylinder. The purpose of these structures is to fix the pneumatic actuator under test. An air supply line 733 supplies air to the pneumatic actuator under test, providing power for its operation. A counting sensor 734 is connected to the air supply line 733 to measure the number of times the pneumatic actuator operates, facilitating the determination of its status. It should be noted that the pneumatic actuator is a conventional cylinder in this field.

[0065] The pneumatic actuator maintenance device also includes a control box 80 mounted on the work frame. The control box 80 consists of high-voltage and low-voltage components, divided into two distribution cabinets: a high-voltage cabinet and a low-voltage cabinet. Inside the high-voltage cabinet, a frequency converter controls the speed and forward / reverse rotation of the reducer. When the cutting device is cutting, it can operate at a speed of 20 revolutions per minute. When the welding device is welding, the speed can be adjusted to 1-1.5 revolutions per minute. An exhaust fan switch is included; the exhaust fan is interlocked to start when cutting and shuts off after a 30-second delay after cutting. The delay time is adjustable. An angle grinder switch controls the angle grinder. A welding machine switch controls the welding machine for welding. When welding is completed and the machine is shut off, it simultaneously interlocks with the solenoid valve of the cooling port 711 to cool the weld joint on the pneumatic actuator. The cooling time can be set. The low-voltage cabinet controls the actuator fixing and cylinder clamping. A time relay controls and detects the actuator's opening and closing frequency, with a set interval time. A counting sensor 734 detects the cylinder's operating frequency and records the values.

[0066] The above-described method for coordinating and using the various components of the pneumatic actuator repair device is as follows: When the pneumatic actuator malfunctions, select a motor 24 of different power and a turntable 22 of different size according to its diameter and height. After placing the pneumatic actuator, adjust the hydraulic press, causing the hydraulic cylinder to move downwards until the pressure plate presses onto the pneumatic actuator being repaired. Adjust the three screws on the pressure plate so that it is positioned on a horizontal plane perpendicular to the central axis of the pneumatic actuator. At this point, adjust the hydraulic press to a pressure of 5-7 bar. Then, clamp the pneumatic actuator using the clamping structure 732. After fixing it, adjust the angle grinder to the required height, ensuring it is horizontal to the pneumatic actuator. Close all protective doors, turn on the motor 24, and the motor 24 will drive the pneumatic actuator to rotate at a speed of 20 revolutions per minute. Turn on the vacuum cleaner 721 and the angle grinder. At this point, the vacuum cleaner 721 fan and the angle grinder are started. By operating the control handle and observing the digital scale on the fine-tuning screw, adjust the fine-tuning screw to... The pneumatic actuator advances at a speed of 0.5 mm per cut, with digital scales in 0.1 mm increments. Multiple digital scales are arranged circumferentially along the fine-tuning screw, with each adjacent scale representing 0.1 mm. After approximately one minute, the pneumatic actuator completes the cut. On the hydraulic unit side, the manual operating handle of the hydraulic unit is rotated counterclockwise to depressurize the hydraulic press. At this time, the hydraulic cylinder gradually moves upward, and the spring inside the pneumatic actuator also moves upward until the spring force is completely released. The cut pneumatic actuator is then removed, forming upper and lower split parts. These parts are repaired and then placed back on the turntable 22 in their original positions. Multiple positioning plates are used to confine the upper and lower split parts within the radial limiting space. The above steps for installing the pneumatic actuator are repeated to allow the pressure plate to gradually press the upper and lower split parts together. At this point, the hydraulic press will withstand a force of 30-40 bar. Once the pneumatic actuator closes, the welding machine is started.

[0067] At this time, the pneumatic actuator rotates 90°, and the welding operation of the welding machine is intermittently welded in segments between each pair of adjacent positioning plates until the welding is completed. Remove all positioning plates, adjust the speed regulator of motor 24 to 1-1.5 revolutions per minute, and turn the welding machine on again for continuous welding. After welding a full circle, turn off the welding machine. At this time, the solenoid valve of the weld joint formed between the upper and lower parts opens, and cooling air blows out of the cooling port 711. After cooling for 60 seconds, it automatically stops. After stopping, remove the pneumatic actuator, place it in the lower detection device, connect the air pipe, and cool the weld joint. Open the clamping structure 732, and then fix the pneumatic actuator on the mounting base 731 of the detection device 73. Use the air supply pipe 733 to provide air source to the pneumatic actuator 1, and conduct detection. The detection time can record the opening and closing time. At the same time, the counting function of the counting sensor 734 is activated to record the number of movements.

[0068] It should be noted that cutting pneumatic actuators with an angle grinder inevitably results in some dimensional loss. During normal angle grinder cutting, the standard blade thickness is 1.5mm, which affects the height of the pneumatic actuator. However, this does not affect its operation because the cutting location is not at the piston's stroke position, but rather at the spring's position. The repaired pneumatic actuator has been tested and confirmed that the 1.5mm reduction in spring stroke did not affect the normal operation of the valve it controls. The repaired pneumatic actuator is currently in use on the milk powder production line and functions normally.

[0069] In addition, multiple positioning plates are used to forcibly restrict and align the pneumatic actuator in the radial direction, and a hydraulic unit is used to fix it with vertical pressure to ensure that the pneumatic actuator does not shift during welding and is centered.

[0070] The operating steps for the pneumatic actuator maintenance device are as follows:

[0071] 1. Connect the power supply to the pneumatic actuator repair device and connect compressed air. The pneumatic actuator repair device should be in standby mode.

[0072] 2. Measure the diameter of the pneumatic actuator that needs to be repaired and select a turntable 22 of the corresponding size.

[0073] 3. After selecting the turntable 22, place the pneumatic actuator on the corresponding turntable 22 and use the hydraulic unit to fix the pneumatic actuator. The hydraulic press is used in conjunction with a pressure gauge. The pressure gauge pressure should reach 5-7 bar.

[0074] 4. The pneumatic actuator on the hydraulic unit is then fixed and locked by the clamping structure 732, which also plays a certain protective role in preventing the pneumatic actuator from shifting during maintenance.

[0075] 5. After the pneumatic actuator is fixed, adjust the first adjusting frame 61 to position the cutting device 30 and select the corresponding cutting position.

[0076] 6. After the cutting device 30 is positioned, power on the cutting device 30 and close the protective door. Turn on the dust removal device switch on the control box 80. After the dust collector starts, turn on the motor switch and select the direction to rotate counterclockwise. Then turn on the cutting device 30 switch on the control box 80.

[0077] 7. After the cutting device 30 is turned on, use the operating handle to drive the cutting device 30 to move horizontally and rotate clockwise to slowly drive the cutting device 30 forward. Observe the cutting status of the cutting device 30 on the pneumatic actuator. The speed of advancement should not be too fast to prevent cutting the internal components of the pneumatic actuator. Observe the depth of the cut on the pneumatic actuator at all times.

[0078] 8. After the pneumatic actuator is cut into the upper and lower parts, the operating handle can be rotated counterclockwise to drive the cutting device 30 back to the starting position. The switch of the cutting device 30 on the control box 80 is turned off to stop the cutting and the dust removal device is turned off.

[0079] 9. After the cutting device 30 has completely stopped, the valve controlling the hydraulic unit to release pressure can be slowly opened clockwise, and the hydraulic unit will return to the starting position.

[0080] 10. After the hydraulic unit is fully opened, turn off the power switch of the cutting device 30, open the protective door, and take out the cut upper and lower parts.

[0081] 11. Inspect the springs and gaskets inside the pneumatic actuator, replace any damaged parts, and clean the oil sludge and impurities inside the pneumatic actuator.

[0082] 12. After the pneumatic actuator is maintained, put the upper and lower split parts back onto the hydraulic unit and turntable 22, and install multiple positioning plates on the hydraulic unit to restrict the upper and lower split parts within the radial limiting space. Use the hydraulic unit to press the cut upper and lower split parts back into a closed state and align the gaps.

[0083] 13. Align the gaps between the upper and lower parts, power on the welding device, close the protective door, open the control box 80, rotate the second clamping part 642 of the second adjusting frame 64 counterclockwise, adjust the position of the welding torch to correspond to the weld, and close the protective door.

[0084] 14. Adjust the welding parameters and the motor rotation speed, start the welding device to weld the cutting position of the pneumatic actuator, observe the welding effect to ensure the weld is formed.

[0085] 15. After the first welding is completed, shut down the welding device, remove multiple positioning plates, and adjust the rotation speed of the motor to perform the second welding. After the second welding is completed, shut down the welding device again, and activate the cooling structure 71 on the control box 80 to cool down the pneumatic actuator that has been welded.

[0086] 16. After the cooling device is finished, open the protective door, depressurize the hydraulic unit, remove the pneumatic actuator, and check the welding effect.

[0087] 17. After checking that there are no problems with the welding, place the pneumatic actuator on the testing device 73, turn on the switch of the clamping structure 732 on the control box 80 to prevent displacement during the testing of the pneumatic actuator, connect the air supply line 733 to the pneumatic actuator, then install the blind plug, turn on the testing device 73 on the control box 80, and turn on the counting sensor 734 to detect the number of times the pneumatic actuator runs.

[0088] 18. During the pneumatic actuator test, check that there is no wear between the spindle and the housing, and no air leakage. If there is no wear, it can be used normally, and the pneumatic actuator maintenance is complete.

[0089] The pneumatic actuator repair device of this application can quickly repair pneumatic actuators that control valves, and can also greatly reduce the danger during disassembly and installation, while saving maintenance costs.

[0090] Taking a powder mill workshop as an example, the pneumatic actuator repair device described in this application addresses a situation where approximately 500 pneumatic actuators, all over 10 years old, experience valve opening / closing failures annually. This problem is expected to increase with age. Replacing each actuator costs between 7,000 and 10,000 yuan. This new device allows for a semi-automatic cutting of the actuator cylinder within one hour, followed by internal maintenance, automatic cylinder welding, automatic cooling, and automated testing. This ensures the actuator can operate on the equipment for over 20,000 cycles, extending its lifespan by about 8 years. This translates to annual maintenance savings of approximately 200,000 yuan, providing a good foundation for future cost reductions.

[0091] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0092] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0093] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pneumatic actuator maintenance device, characterized in that, include: Work rack (10); A drive structure (20) is provided on the work frame (10), and the drive structure (20) is used to drive the pneumatic actuator (1) to rotate; A cutting device (30) is laterally movable on the work frame (10), and the cutting device (30) is used to cut the pneumatic actuator (1). A welding device (40) is adjustablely mounted on the work frame (10) and is used to weld the pneumatic actuator (1) after it has been cut. The pneumatic actuator maintenance device also includes a pressing device (50) disposed on the work frame (10), the pressing device (50) being located directly above the drive structure (20) and used to engage with the pneumatic actuator (1); The extrusion device (50) includes a cylinder (51), a piston rod (52) movably disposed on the cylinder (51), and a pressure plate (53) rotatably sleeved on the end of the piston rod (52). The pressure plate (53) is located directly above the drive structure (20) and abuts against the pneumatic actuator (1). The pneumatic actuator maintenance device also includes multiple positioning plates (54), which are spaced apart circumferentially along the pressure plate (53). Each positioning plate (54) is adjustable in position along the axial direction of the pressure plate (53), and a radial limiting space is formed between the multiple positioning plates (54). The pneumatic actuator (1) is confined within the radial limiting space.

2. The pneumatic actuator maintenance device according to claim 1, characterized in that, The drive structure (20) includes a motor (24) mounted on the work frame (10), a vertical shaft (21) driven by the motor (24), and a turntable (22) connected to the vertical shaft (21). The motor (24) can drive the vertical shaft (21) to rotate, so that the vertical shaft (21) drives the turntable (22) to rotate, so that the turntable (22) drives the pneumatic actuator (1) to rotate.

3. The pneumatic actuator maintenance device according to claim 2, characterized in that, The drive structure (20) also includes a plurality of trays (23), each of which has a different diameter and is detachably mounted on the turntable (22). The pneumatic actuator (1) is mounted on one of the plurality of trays (23) so that the turntable (22) drives the pneumatic actuator (1) to rotate via the trays (23).

4. The pneumatic actuator maintenance device according to claim 1, characterized in that, The cutting device (30) is movably mounted on the work frame (10) via a first adjusting frame (61). The first adjusting frame (61) includes a first mounting part (611) movably mounted on the work frame (10) and a first clamping part (612) movably mounted on the first mounting part (611). The first clamping part (612) fixes the cutting device (30) on the first mounting part (611). The work frame (10) is also provided with a rotatable operating rod (62). When the operating rod (62) rotates, it drives the first mounting part (611) to reciprocate. A slide rail (631) and a slide groove (632) that slides with the slide rail (631) are provided between the first mounting part (611) and the work frame (10).

5. The pneumatic actuator maintenance device according to claim 1, characterized in that, The welding device (40) is positionally adjustable on the work frame (10) via a second adjusting frame (64). The second adjusting frame (64) includes a second mounting part (641) on the work frame (10) and a second clamping part (642) angle-adjustable on the second mounting part (641). The second clamping part (642) clamps the welding device (40).

6. The pneumatic actuator maintenance device according to claim 1, characterized in that, The pneumatic actuator maintenance device also includes a cooling structure (71) set on the work frame (10), the cooling structure (71) includes a cooling port (711) facing the welded position on the pneumatic actuator (1); And / or, the pneumatic actuator repair device further includes a dust removal device (72), which includes a vacuum cleaner (721) mounted on the work frame (10) and a suction pipe (722) connected to the vacuum cleaner (721), with the opening of the suction pipe (722) facing the position to be cut on the pneumatic actuator (1).

7. The pneumatic actuator maintenance device according to claim 1, characterized in that, The pneumatic actuator maintenance device also includes a detection device (73) mounted on the work frame (10). The detection device (73) includes a mounting base (731) mounted on the work frame (10), a clamping structure (732) mounted on the mounting base (731), an air supply line (733) mounted on the work frame (10), and a counting sensor (734) mounted on the mounting base (731). The clamping structure (732) fixes the pneumatic actuator (1) on the mounting base (731), and the counting sensor (734) is used to detect the number of times the pneumatic actuator (1) operates.

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