Pneumatic actuator assembly testing device

Abstract

The application relates to the technical field of detection devices, and discloses a pneumatic actuator assembly testing device which comprises a testing table, the top of the testing table is fixedly connected with a top cover plate, the bottom of the top cover plate is fixedly connected with a lead screw assembly, the lead screw assembly is movably connected with a detection mechanism, the side of the testing table is fixedly connected with a mounting table, the top of the mounting table is fixedly connected with a mounting assembly, the testing table is fixedly connected with a front testing table, the detection mechanism is used for fixing the pneumatic actuator, qualified products are transported to the mounting assembly for assembly through the lead screw assembly, and unqualified products are dropped from the mounting table; the device is provided with the detection mechanism and an optical assembly, the detection mechanism controls the opening and closing of the outer limiting plate through gear and rack transmission, can stably clamp the cylinder, can realize real-time monitoring of piston rod displacement through the optical assembly, can detect the air tightness of the pneumatic actuator, and can reduce the detection cost, and significantly improve the testing efficiency and precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection devices, in particular to a pneumatic actuator assembly testing device. BACKGROUND

[0002] The actuator and regulating mechanism of the pneumatic actuator are a unified whole, the actuator has a diaphragm type, a piston type, a fork type and a gear rack type. The piston type has a long stroke and is suitable for occasions requiring a large thrust; the diaphragm type has a small stroke and can only directly drive the valve rod. The fork type pneumatic actuator has a large torque, a small space, a torque curve more in line with the torque curve of the valve, etc., but is not very aesthetic; it is commonly used on large torque valves. The gear rack type pneumatic actuator has the advantages of simple structure, stable and reliable action, safety and explosion-proof, and is widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements.

[0003] Publication No. CN222027881U discloses a pneumatic actuator air tightness detection device, which comprises a rectangular workbench, a connecting frame is fixedly arranged on one side of the upper end of the workbench, a box is fixedly installed on the upper end of the connecting frame, a box door is hingedly fixed on one side of the box, a power supply and a controller are fixedly arranged on the lower end inside the box, a DC compressor is fixedly installed on the upper end inside the box, one end of the DC compressor is connected to a connecting gas pipe, the other end of the connecting gas pipe is connected to a gas storage tank, one end of the gas storage tank is connected to two branch gas pipes; a fixed plate is fixedly arranged on the upper end face of the workbench close to one side edge, a support is installed on the upper end of the fixed plate close to one side of the center, a gas cylinder is arranged on the support beam, a pressing block is fixedly arranged on the lower end of the output end of the gas cylinder, a group of gas pipe butt joints are arranged on the bottom end of the pressing block, and the gas pipe butt joints are connected to the branch gas pipes above.

[0004] The current method is to spray leak detection liquid at the sealing place of the air cavity, and to judge the air tightness of the air cavity by the number of bubbles generated, but this method has the problems that on the one hand the sealing place of some air cavities is located inside the actuator, and the leak detection liquid cannot be effectively sprayed, and on the other hand, the judgment of whether it is qualified by the number of bubbles generated is subjective, and different testers will draw different test conclusions. The above patent detects the air tightness by gas flow, and the sensitivity of the detection depends on the sensitivity of the flow meter. The high-precision flow meter is expensive, and the detection result of the low-precision flow meter is not accurate enough. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the present application provides a pneumatic actuator assembly testing device to solve the problems in the above background.

[0006] The application provides the following technical scheme: a pneumatic actuator assembly testing device, comprising a testing table, a top cover plate fixedly connected to the top of the testing table, a lead screw assembly fixedly connected to the bottom of the top cover plate, a detection mechanism movably connected to the lead screw assembly, an installation table fixedly connected to the side of the testing table, an installation assembly fixedly connected to the top of the installation table, and a front testing table fixedly connected to the testing table; the detection mechanism is used for fixing the pneumatic actuator, and qualified products are transported to the installation assembly for assembly through the lead screw assembly, and unqualified products are dropped from the installation table;

[0007] The detection mechanism comprises a device housing, a gear provided in the device housing, the gear being rotatably connected to the device housing, a connecting plate rotatably connected to the gear, a connecting head rotatably connected to the top of the connecting plate, a threaded rod rotatably connected to the top of the connecting head, a first motor provided at the top of the threaded rod, the output shaft of the first motor being fixedly connected to the threaded rod, the first motor being movably connected to the lead screw assembly, a first gear rack meshingly connected to the bottom of the gear, an outside limiting plate movably connected to the inner side of the first gear rack, a second gear rack fixedly connected to the center of the outside limiting plate, the second gear rack being movably connected to the first gear rack, an optical assembly meshingly connected to the top of the second gear rack, and a reflecting mirror and a receiver fixedly connected to the inside of the device housing.

[0008] Further, a hydraulic device is fixedly connected to the top of the device housing, the hydraulic device is movably connected to the lead screw assembly, a support frame is movably connected to the side of the device housing, a pneumatic pressure pump is fixedly connected to the top of the support frame, a connecting interface is fixedly connected to the side of the support frame, the connecting interface is communicated with the pneumatic pressure pump through a pipeline, a spring is fixedly connected to the side of the outside limiting plate, a contact plate is fixedly connected to the side of the spring, and the threaded rod is threadedly connected to the device housing.

[0009] Further, a groove is formed in the center of the testing table, and a conveying belt is movably connected in the groove; and a plurality of buffer blocks are fixedly connected to the inclined surface of the installation table.

[0010] Further, the optical assembly comprises a limiting block, a connecting rod is fixedly connected to the side of the limiting block, a third gear is movably connected to the connecting rod, the limiting block is fixedly connected to the inner side of the device housing, and an infrared light emitter is fixedly connected to the side of the connecting rod.

[0011] Further, the side of the infrared light emitter is provided with a reset assembly, the reset assembly is movably connected to the inner side of the device shell, the reset assembly mainly drives the infrared light emitter to rotate through the motor, so as to reset the infrared light emitter, the side of the connecting rod is rotatably connected with a movable plate, the side of the movable plate is fixedly connected with a fixed spring, the fixed spring is fixedly connected with the connecting rod, the third gear, the movable plate and the fixed spring form a ratchet mechanism, and the ratchet mechanism drives the infrared light emitter to rotate when the outer limiting plate moves inward.

[0012] In use, the threaded rod is driven to move downward on the device shell through the rotation of the first motor, the threaded rod drives the connecting head and the connecting plate rotatably connected to the connecting head to move downward, the connecting plate drives the gear to rotate, the gear drives the first rack to move horizontally inward, the first rack drives the outer limiting plate, the contact plate and the spring connected to the inner side to move inward, the outer limiting plate moves horizontally inward and leans against the outer wall of the cylinder of the pneumatic actuator, the contact plate and the spring extend into the cylinder, the pneumatic actuator is fixed, the connecting interface is aligned with the nozzle on the pneumatic actuator, and the cylinder is inflated through the pneumatic pressure pump, the piston rod in the cylinder moves outward under stress after inflation, pushes the contact plate and the spring to move outward, the compression distance of the spring is detected by the infrared distance sensor between the contact plate and the outer limiting plate, and then the spring moves toward the mounting table under the drive of the top movably connected lead screw assembly, during which the pneumatic actuator is qualified, and unqualified products are loosened from the fixing of the outer limiting plate on the pneumatic actuator through the upward drive of the threaded rod by the first motor when the detection mechanism moves between the test table and the mounting table, so that the connecting interface is disconnected from the nozzle, and the pneumatic actuator falls from the inclined surface of the mounting table to the conveying belt.

[0013] Further, the mounting assembly comprises a base, the top of the base is fixedly connected with a hydraulic telescopic assembly, the side of the hydraulic telescopic assembly is movably connected with a fixed sleeve, the top of the fixed sleeve is fixedly connected with a laser emitter, the side of the fixed sleeve is movably connected with a disc, the disc is provided with a bolt mounting hole and a ventilation hole, and the disc is fixedly connected with a laser receiver.

[0014] Further, the side of the hydraulic telescopic assembly is movably connected with a telescopic rod, the side of the telescopic rod is fixedly connected with a pneumatic adsorption device, the side of the pneumatic adsorption device is fixedly connected with a fixed disc, the side of the fixed disc is fixedly connected with a second motor, the side output shaft of the second motor is fixedly connected with a bolt mounting rod, the side of the fixed disc is fixedly connected with a connecting rod, the side of the connecting rod is fixedly connected with a spring damper, the spring damper is fixedly connected with the hydraulic telescopic assembly, the tip of the bolt mounting rod is magnetized, and the disc is sleeved on the sleeve rod.

[0015] In the installation of qualified products, the disc is first pushed inward, the bolt installation rod on the bolt is then reset, the outer shell plate is installed on the inner surface of the disc, the pneumatic suction device is suctioned and fixed through the air hole, then the fixed sleeve and the disc are pushed inward through the hydraulic telescopic assembly, in the process, the connecting interface is connected with the nozzle on the starting execution mechanism, the pneumatic execution mechanism is fixed in position, the outer shell plate is positioned by the laser emitter and the laser receiver, the disc is attached to the pneumatic execution mechanism, the second motor drives the bolt installation rod to rotate, the bolt is fixed on the pneumatic execution mechanism, and the fixed installation of the pneumatic execution mechanism is completed.

[0016] Further, the test bench is provided with a control assembly, including a data transmission unit, a data processing and calculation unit, a driving unit and a man-machine interaction unit, the data transmission unit includes an infrared distance sensor, a laser emitter and a receiver, the infrared distance sensor is arranged between the outer limiting plate and the contact plate, and is used to detect the elongation or shortening amount of the spring, and the data processing and calculation unit is used to calculate the thrust. Advantages

[0017] The pneumatic actuator assembly test device realizes automatic fixing, inflation testing and transportation classification integrated operation of the pneumatic actuator through linkage design of the lead screw assembly and the detection mechanism. The detection mechanism controls the opening and closing of the outer limiting plate by using gear and rack transmission, which can not only firmly clamp the cylinder, but also can real-time monitor the displacement of the piston rod through the optical assembly to detect the air tightness of the pneumatic actuator, and also reduces the detection cost and significantly improves the test efficiency and accuracy.

[0018] The pneumatic actuator assembly test device, the device realizes automatic sorting through double mode release mechanism, unqualified products are released between the test bench and the installation bench, and directly fall into the conveying belt; qualified products are limited by the connecting interface, and are accurately transported to the installation assembly for assembly. This design avoids manual intervention, reduces the risk of misjudgment, and at the same time, the cooperative movement of the hydraulic device and the lead screw assembly ensures that products with different detection results flow to the correct path, effectively improving the yield and reliability of the production line. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An external overall structure schematic diagram of a pneumatic actuator assembly test device is provided for the present application;

[0020] Figure 2 An external overall structure schematic diagram of a pneumatic actuator assembly test device is provided for the present application;

[0021] Figure 3The internal structure sectional view of the device shell of the pneumatic actuator assembly testing device;

[0022] Figure 4 The optical assembly structure schematic view of the pneumatic actuator assembly testing device;

[0023] Figure 5 The optical assembly local sectional view schematic view of the pneumatic actuator assembly testing device;

[0024] Figure 6 The installation assembly structure schematic view of the pneumatic actuator assembly testing device;

[0025] Figure 7 The installation assembly internal structure schematic view of the pneumatic actuator assembly testing device;

[0026] Figure 8 For Figure 3 The structure enlarged view of A.

[0027] Wherein: 1, test table; 2, installation table; 3, top cover plate; 4, screw rod assembly; 5, front test table; 6, detection mechanism; 601, device shell; 602, support frame; 603, pneumatic pressure pump; 604, hydraulic device; 605, No. 1 motor; 606, threaded rod; 607, gear; 608, No. 1 rack; 609, connecting plate; 610, connecting head; 611, connecting interface; 612, outer limit plate; 613, No. 2 rack; 614, mirror surface; 615, receiver; 616, optical assembly; 6161, limit block; 6162, No. 3 gear; 6163, infrared light emitter; 6164, connecting rod; 6165, reset assembly; 6166, movable plate; 6167, fixed spring; 617, contact plate; 618, spring; 7, installation assembly; 701, base; 702, hydraulic telescopic assembly; 703, fixed sleeve; 704, laser emitter; 705, disc; 706, bolt mounting hole; 707, air hole; 708, laser receiver; 709, telescopic rod; 710, bolt mounting rod; 711, sleeve rod; 712, No. 2 motor; 713, fixed disc; 714, pneumatic adsorption device; 715, spring damper; 716, connecting rod; 8, control assembly; 9, transmission belt; 10, buffer block. DETAILED DESCRIPTION

[0028] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0029] Please refer to Figures 1-3 , Figure 8 , a pneumatic actuator assembly test device, comprising a test table 1, the top of the test table 1 is fixedly connected with a top cover plate 3, the bottom of the top cover plate 3 is fixedly connected with a lead screw assembly 4, the lead screw assembly 4 is movably connected with a detection mechanism 6, the side of the test table 1 is fixedly connected with a mounting table 2, the top of the mounting table 2 is fixedly connected with a mounting assembly 7, the test table 1 is fixedly connected with a front test table 5, the detection mechanism 6 is used for fixing the pneumatic actuator, and qualified products are transported to the mounting assembly 7 for assembly through the lead screw assembly 4, and unqualified products are dropped from the mounting table 2;

[0030] The detection mechanism 6 comprises a device housing 601, the inside of the device housing 601 is provided with a gear 607, the gear 607 is rotatably connected with the device housing 601, the gear 607 is rotatably connected with a connecting plate 609, the top of the connecting plate 609 is rotatably connected with a connecting head 610, the top of the connecting head 610 is rotatably connected with a threaded rod 606, the top of the threaded rod 606 is provided with a first motor 605, the output shaft of the first motor 605 is fixedly connected with the threaded rod 606, the top of the first motor 605 is movably connected with the lead screw assembly 4, the bottom of the gear 607 is meshingly connected with a first rack 608, the inner side of the first rack 608 is movably connected with an outer side limiting plate 612, the center of the outer side limiting plate 612 is fixedly connected with a second rack 613, the second rack 613 and the first rack 608 are movably connected, the top of the second rack 613 is meshingly connected with an optical assembly 616, the inside of the device housing 601 is fixedly connected with a reflecting mirror surface 614 and a receiver 615.

[0031] The top of the device housing 601 is fixedly connected with a hydraulic device 604, the hydraulic device 604 is movably connected with the lead screw assembly 4, the side of the device housing 601 is movably connected with a support frame 602, the top of the support frame 602 is fixedly connected with a pneumatic pressure pump 603, the side of the support frame 602 is fixedly connected with a connecting interface 611, the connecting interface 611 is communicated with the pneumatic pressure pump 603 through a pipeline, the side of the outer side limiting plate 612 is fixedly connected with a spring 618, the side of the spring 618 is fixedly connected with a contact plate 617, and the threaded rod 606 and the device housing 601 are threadedly connected.

[0032] The embodiment needs to be specifically explained: in use, the threaded rod 606 is rotated by the first motor 605 to move downward on the device housing 601, the connecting head 610 and the connecting plate 609 rotatably connected to the connecting head 610 are driven by the threaded rod 606 to move downward, the connecting plate 609 drives the gear 607 to rotate, the first rack 608 is driven by the gear 607 to move horizontally inward, the outer limiting plate 612, the contact plate 617 and the spring 618 connected to the inner side are driven by the first rack 608 to move inward, the outer limiting plate 612 moves horizontally inward and leans against the outer wall of the cylinder of the pneumatic actuator, the contact plate 617 and the spring 618 extend into the inside of the cylinder, the pneumatic actuator is fixed, the connecting interface 611 is aligned with the nozzle on the pneumatic actuator, the inside of the cylinder is inflated by the pneumatic pressure pump 603, the piston rod in the cylinder moves outward under stress after inflation, pushes the contact plate 617 and the spring 618 to move outward, the compression distance of the spring 618 is detected by the infrared distance sensor between the contact plate 617 and the outer limiting plate 612, then moves to the installation table 2 direction under the driving of the top movably connected lead screw assembly 4, the qualified detection of the pneumatic actuator is carried out during the movement, the unqualified product will be loosened by the threaded rod 606 driven upward by the first motor 605 when the detection mechanism 6 moves between the test table 1 and the installation table 2, so that the outer limiting plate 612 is fixed to the pneumatic actuator, at the same time, the connecting interface 611 is disconnected with the nozzle, so that the pneumatic actuator falls from the slope of the installation table 2 to the transmission belt 9, the qualified product is driven to the installation assembly 7 by the detection mechanism 6, the threaded rod 606 is driven upward by the first motor 605 to loosen the fixing of the pneumatic actuator by the outer limiting plate 612, at this time, the connecting interface 611 is still connected with the nozzle of the pneumatic actuator, which plays a limiting and fixing role, and facilitates the shell installation.

[0033] Please refer to Figures 3-5 The side of the infrared light emitter 6163 is provided with a reset assembly 6165 movably connected to the inner side of the device housing 601, the reset assembly 6165 mainly drives the infrared light emitter 6163 to rotate by the motor, so as to reset the infrared light emitter 6163, the side of the connecting rod 6164 is rotatably connected with the movable plate 6166, the side of the movable plate 6166 is fixedly connected with the fixed spring 6167, the fixed spring 6167 is fixedly connected with the connecting rod 6164, the third gear 6162, the movable plate 6166 and the fixed spring 6167 form a ratchet mechanism, which drives the infrared light emitter 6163 to rotate when the outer limiting plate 612 moves inward.

[0034] Specifically, when the outer limiting plate 612 is tightly attached to the outer wall of the cylinder of the pneumatic actuator, the contact plate 617 and the spring 618 extend into the cylinder, and the contact plate 617 is tightly attached to the piston rod. After the pneumatic pressure pump 603 charges air into the pneumatic actuator, the piston rod pushes the contact plate 617 to move outward, so that the spring 618 is compressed. Then stop charging air, at this time the spring 618 is in a tight state, when there is a leakage phenomenon in the cylinder, the internal air pressure decreases, the spring 618 will push the contact plate 617 to move inward, the contact plate 617 drives the second rack 613 to move inward, the second rack 613 drives the optical assembly 616 connected therewith to move, the third gear 6162 rotates under the driving of the second rack 613, and the ratchet mechanism composed of the third gear 6162, the movable plate 6166 and the fixed spring 6167 drives the connecting rod 6164 to rotate only when the second rack 613 moves inward, the connecting rod 6164 drives the infrared light emitter 6163 to rotate, and the rotation of the infrared light emitter 6163 changes the position of the light irradiated to the optical assembly 616, thereby confirming the air tightness of the pneumatic actuator. Subsequently, the infrared light emitter 6163 returns to the initial position through the reset assembly 6165, facilitating the next detection.

[0035] Please refer to Figure 1 、 Figures 6-7 , the mounting assembly 7 comprises a base 701, the top of the base 701 is fixedly connected with a hydraulic telescopic assembly 702, the side of the hydraulic telescopic assembly 702 is movably connected with a fixed sleeve 703, the top of the fixed sleeve 703 is fixedly connected with a laser emitter 704, the side of the fixed sleeve 703 is movably connected with a disc 705, the disc 705 is provided with a bolt mounting hole 706 and a ventilation hole 707, and the disc 705 is fixedly connected with a laser receiver 708.

[0036] The side of the hydraulic telescopic assembly 702 is movably connected with a telescopic rod 709, the side of the telescopic rod 709 is fixedly connected with a pneumatic adsorption device 714, the side of the pneumatic adsorption device 714 is fixedly connected with a fixed disc 713, the side of the fixed disc 713 is fixedly connected with a second motor 712, the side output shaft of the second motor 712 is fixedly connected with a bolt mounting rod 710, the side of the fixed disc 713 is fixedly connected with a connecting rod 716, the side of the connecting rod 716 is fixedly connected with a spring damper 715, the spring damper 715 is fixedly connected with the side of the hydraulic telescopic assembly 702, the tip of the bolt mounting rod 710 is magnetized, and the disc 705 is sleeved on the sleeve rod 711.

[0037] The embodiment needs to be specifically explained: when the qualified product is installed, the disc 705 is first pushed inward, the bolt installation rod 710 on the bolt is followed, and the disc 705 is reset, the shell plate is installed on the inner surface of the disc 705, the pneumatic adsorption device 714 is adsorbed and fixed on the shell plate through the air hole 707, then the fixed sleeve shell 703 and the disc 705 are pushed inward through the hydraulic telescopic assembly 702, in the process, the connecting interface 611 is connected with the nozzle on the starting execution mechanism, the position of the pneumatic execution mechanism is fixed, the shell plate is positioned through the laser emitter 704 and the laser receiver 708, the disc 705 is attached to the pneumatic execution mechanism, the second motor 712 drives the bolt installation rod 710 to rotate, and the bolt is fixed on the pneumatic execution mechanism, and the fixed installation of the pneumatic execution mechanism is completed.

[0038] Please refer to Figures 1-3 , the test bench 1 is provided with a control assembly 8, including a data transmission unit, a data processing calculation unit, a driving unit and a man-machine interaction unit, the data transmission unit includes an infrared distance measuring sensor, a laser emitter 704 and a receiver 615, the infrared distance measuring sensor is arranged between the outer limiting plate 612 and the contact plate 617, and is used for detecting the elongation or shortening amount of the spring 618, and the data processing calculation unit is used for calculating the thrust.

[0039] The embodiment needs to be specifically explained: the air tightness is judged by detecting the position of the light emitted by the infrared light emitter 6163 through the receiver 615, and the thrust of the pneumatic execution mechanism is converted through the thrust of the piston rod.

[0040] The thrust F of the piston rod is equal to the pressure received by the spring 618, that is,

[0041]

[0042] Wherein

[0043] G: Shear modulus of material (unit: Pa);

[0044] d: Spring wire diameter (unit: m or mm);

[0045] D: Spring diameter (average diameter of coil, unit: m or mm);

[0046] n: Effective number of turns of spring (unitless);

[0047] C: Number of springs;

[0048] X: Compression amount of spring.

[0049] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A pneumatic actuator assembly testing device comprising a test bench (1), characterized in that: The top of the test platform (1) is fixedly connected with a top cover plate (3), the bottom of the top cover plate (3) is fixedly connected with a lead screw assembly (4), the lead screw assembly (4) is movably connected with a detection mechanism (6), the side of the test platform (1) is fixedly connected with a mounting platform (2), the top of the mounting platform (2) is fixedly connected with a mounting assembly (7), the test platform (1) is fixedly connected with a front test platform (5), the detection mechanism (6) is used for fixing the pneumatic actuator, and qualified products are transported to the mounting assembly (7) for assembly through the lead screw assembly (4), and unqualified products are dropped from the mounting platform (2); The detection mechanism (6) comprises a device shell (601), a gear (607) is arranged in the device shell (601), the gear (607) is rotatably connected with the device shell (601), a connecting plate (609) is rotatably connected with the gear (607), a connecting head (610) is rotatably connected with the top of the connecting plate (609), a threaded rod (606) is rotatably connected with the top of the connecting head (610), a first motor (605) is arranged on the top of the threaded rod (606), the output shaft of the first motor (605) is fixedly connected with the threaded rod (606), the top of the first motor (605) is movably connected with the lead screw assembly (4), a first gear rack (608) is meshedly connected to the bottom of the gear (607), an outer side limiting plate (612) is movably connected to the inner side of the first gear rack (608), a second gear rack (613) is fixedly connected to the center of the outer side limiting plate (612), the second gear rack (613) is movably connected with the first gear rack (608), an optical assembly (616) is meshedly connected to the top of the second gear rack (613), a reflecting mirror (614) and a receiver (615) are fixedly connected in the device shell (601).

2. The test device for a pneumatic actuator according to claim 1, wherein: The top of the device shell (601) is fixedly connected with a hydraulic device (604), the hydraulic device (604) is movably connected with the lead screw assembly (4), the side of the device shell (601) is movably connected with a support frame (602), the top of the support frame (602) is fixedly connected with a pneumatic pressure pump (603), a connecting interface (611) is fixedly connected to the side of the support frame (602), the connecting interface (611) is communicated with the pneumatic pressure pump (603) through a pipeline, a spring (618) is fixedly connected to the side of the outer side limiting plate (612), a contact plate (617) is fixedly connected to the side of the spring (618), and the threaded rod (606) is threadedly connected with the device shell (601).

3. The test device for a pneumatic actuator according to claim 1, wherein: The center of the test platform (1) is provided with a groove, and a conveying belt (9) is movably connected in the groove, and a plurality of buffer blocks (10) are fixedly connected to the inclined surface of the mounting platform (2).

4. The test device for a pneumatic actuator assembly as set forth in claim 2, wherein: The optical assembly (616) includes a limit block (6161), the side of the limit block (6161) is fixedly connected with a connecting rod (6164), the connecting rod (6164) is movably connected with a third gear (6162), the limit block (6161) is fixedly connected to the inner side of the device shell (601), and the side of the connecting rod (6164) is fixedly connected with an infrared light emitter (6163).

5. A test device for a pneumatic actuator assembly as defined in claim 4, wherein: The side of the infrared light emitter (6163) is provided with a reset assembly (6165), the reset assembly (6165) is movably connected to the inner side of the device shell (601), the reset assembly (6165) mainly drives the infrared light emitter (6163) to rotate through the motor, so that the infrared light emitter (6163) is reset, the side of the connecting rod (6164) is rotatably connected with an activity plate (6166), the side of the activity plate (6166) is fixedly connected with a fixed spring (6167), the fixed spring (6167) is fixedly connected with the connecting rod (6164), the third gear (6162), the activity plate (6166) and the fixed spring (6167) constitute a ratchet mechanism, and the ratchet mechanism enables the infrared light emitter (6163) to rotate when the outer side limiting plate (612) moves inward.

6. The test device for a pneumatic actuator assembly as set forth in claim 2, wherein: The mounting assembly (7) comprises a base (701), the top of the base (701) is fixedly connected with a hydraulic telescopic assembly (702), the side of the hydraulic telescopic assembly (702) is movably connected with a fixed sleeve (703), the top of the fixed sleeve (703) is fixedly connected with a laser emitter (704), the side of the fixed sleeve (703) is movably connected with a disc (705), the disc (705) is provided with a bolt mounting hole (706) and a ventilation hole (707), and the disc (705) is fixedly connected with a laser receiver (708).

7. A test device for a pneumatic actuator assembly as defined in claim 6, wherein: The side of the hydraulic telescopic assembly (702) is movably connected with a telescopic rod (709), the side of the telescopic rod (709) is fixedly connected with a pneumatic adsorption device (714), the side of the pneumatic adsorption device (714) is fixedly connected with a fixed disc (713), the side of the fixed disc (713) is fixedly connected with a second motor (712), the side output shaft of the second motor (712) is fixedly connected with a bolt mounting rod (710), the side of the fixed disc (713) is fixedly connected with a connecting rod (716), the side of the connecting rod (716) is fixedly connected with a spring damper (715), the spring damper (715) is fixedly connected with the hydraulic telescopic assembly (702) on the side, and the tip of the bolt mounting rod (710) is magnetized.

8. The test device for a pneumatic actuator assembly as set forth in claim 6, wherein: The test bench (1) is provided with a control assembly (8), including a data transmission unit, a data processing calculation unit, a driving unit and a man-machine interaction unit, the data transmission unit includes an infrared distance measuring sensor, a laser emitter (704) and a receiver (615), the infrared distance measuring sensor is arranged between the outer limiting plate (612) and the contact plate (617), for detecting the elongation or shortening amount of the spring (618), the data processing calculation unit is used for calculating the thrust.

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