Protective film sealing detection device and use method thereof

Abstract

The invention discloses a protective film sealing detection device and a use method thereof, and belongs to the technical field of protective film detection.The protective film sealing detection device comprises a base placed on a workbench, an air cylinder is fixedly mounted in the middle of the upper surface of the base, and a mounting frame is fixedly mounted above the base; a mounting hole for mounting a film body is formed in the mounting frame; the movable plate is fixedly mounted at the output end of the air cylinder; the positioning assembly is mounted on the mounting frame; the gas transmission assembly is mounted at the top of the mounting frame; the detection plate is slidably mounted on the inner side of the mounting frame, a bottom plate is mounted at the bottom of the mounting frame, a second spring is connected between the detection plate and the bottom plate, and a transfusion assembly is connected between the detection plate and the mounting frame. According to the protective film sealing detection device and the use method thereof, a plurality of groups of film bodies can be quickly sealed and fixed, and a loophole can be automatically marked when a poor sealing effect is detected.

Description

Technical Field

[0001] The present invention relates to the technical field of protective film detection, and in particular to a protective film sealing detection device and a use method thereof. Background Art

[0002] In industrial production, protective films are widely used to protect the surface of the workpiece to prevent damage during processing, transportation and storage. However, whether the protective film completely and tightly covers the surface of the workpiece directly affects the protective effect. Therefore, a protective film sealing detection device is needed to detect the sealing effect of the film.

[0003] The prior art (application number: 202110236872.8, Chinese patent with application date of 2021-03-03) discloses a rubber diaphragm sealing detection device, including an operating table, an air guide pump and a detection box. An air guide chamber and an air storage chamber are formed on the operating table. The air guide chamber is an open structure, and the rubber diaphragm can cover the open end of the air guide chamber. A first air guide pipe is connected between the air storage chamber and the air guide chamber, and a second air guide pipe is connected between the air storage chamber and the detection box. A detection area, an observation area and a swing rod are provided in the detection box. A detection block is installed at one end of the swing rod built in the detection area, and a swing ball is installed at one end of the swing rod built in the observation area. If there is a hole in the rubber diaphragm, the air guide pump can pass through the hole to introduce gas into the air guide chamber and impact the detection block in the detection area through the air storage chamber to drive the swing ball to swing, thereby relatively accurately judging the sealing of the rubber diaphragm; However, when the existing sealing detection device is detecting the membrane, manual adjustment is required to achieve fixed installation of the membrane, and the specific leak position of the membrane cannot be automatically marked during the detection process, which increases the difficulty of subsequent search and research on the leak position and has certain usage defects. Summary of the invention

[0004] The object of the present invention is to provide a protective film sealing detection device and a method of using the same, so as to solve the problem raised by the above background technology that the protective film sealing detection device currently on the market cannot quickly install the film and mark the holes.

[0005] To achieve the above object, the present invention provides the following technical solutions: a protective film sealing detection device and a method of using the same, comprising a base placed on a workbench, a cylinder fixedly installed in the middle of the upper surface of the base, a mounting frame fixedly installed above the base, and a mounting hole for mounting a film body is opened on the mounting frame; It also includes: a movable plate, fixedly mounted on the output end of the cylinder; The positioning component is installed on the mounting frame and seals and fixes the membrane body in the mounting hole under the drive of the movable plate; The gas delivery component is installed on the top of the mounting frame. A transmission component is connected between the gas delivery component and the movable plate. During the movement of the movable plate, the gas delivery component is driven by the transmission component to deliver gas to the inner side of the mounting frame. The detection plate is slidably mounted on the inner side of the mounting frame, a base plate is mounted on the bottom of the mounting frame, and a second spring is connected between the detection plate and the base plate, an infusion component is connected between the detection plate and the mounting frame, a liquid storage tank is fixedly mounted on the outer side of the mounting frame, and a suction tube and a reflux tube are connected between the infusion component and the liquid storage tank.

[0006] Preferably, the mounting hole is stepped, and the positioning assembly includes a positioning adhesive fixedly mounted on the inner wall of the mounting hole, and a membrane is bonded to the outer side of the positioning adhesive, while a positioning frame is rotatably connected to the outer side of the mounting hole, and a connecting rod is hinged between the positioning frame and the movable plate.

[0007] Preferably, the gas delivery assembly includes a top seat fixedly mounted on the top of the mounting frame, and the transmission assembly includes a first push rod elastically rotatably mounted on the top seat, and a pull rope is wound around the shaft of the first push rod, and the lower end of the pull rope is fixedly connected to the movable plate, and a guide wheel is rotatably mounted on the lower end of the mounting frame, and the pull rope is attached to the outer side of the guide wheel.

[0008] Preferably, a second push rod is elastically rotatably mounted on one end of the first push rod close to the center of the top seat, and a roller is rotatably mounted on the top of the second push rod, and a baffle is fixedly provided on the lower surface of one end of the first push rod close to the second push rod, and the baffle limits the clockwise rotation angle of the second push rod.

[0009] Preferably, the gas delivery component also includes a piston plate which is interference-slidably arranged on the inner side of the top seat, and a first spring is connected between the piston plate and the top seat, and a push plate is fixedly connected to the top of the piston plate through a rod body, and the push plate is located above the top seat, and the roller is initially attached to the lower surface of the push plate, and the push plate is pushed up by the second push rod and the roller during the rotation of the first push rod.

[0010] Preferably, the lower end of the top seat is connected to an air intake pipe and an exhaust pipe respectively, and the exhaust pipe passes through the top of the mounting frame, and a one-way valve structure is provided on the air intake pipe and the exhaust pipe.

[0011] Preferably, the side wall of the detection plate is sealed and attached to the mounting frame and the membrane body, and the detection plate elastically moves downward along the inner side of the mounting frame under the action of the internal air pressure of the mounting frame.

[0012] Preferably, the infusion component includes a second liquid capsule fixedly connected between the detection plate and the mounting frame, and the upper end of the second liquid capsule is connected to the first liquid capsule, an atomizing nozzle is fixedly mounted on the upper end of the detection plate, and a pressure valve structure is arranged on the inner side of the atomizing nozzle, and the second liquid capsule and the atomizing nozzle are connected by a one-way flow pipe, and the first liquid capsule and the liquid storage tank are connected by a one-way infusion suction tube, and during the lifting and lowering movement of the detection plate, the marking pigment in the liquid storage tank is extracted through the first liquid capsule and the second liquid capsule, and the pigment is sprayed out and atomized through the atomizing nozzle.

[0013] Preferably, a valve is installed on the reflux pipe connected between the first liquid bag and the liquid storage tank, and the valve is opened after the movement of the detection plate stops.

[0014] A method for using a protective film sealing detection device comprises the following steps.

[0015] S1. Paste the membrane body flatly on the positioning adhesive of the mounting hole, control the cylinder to push the movable plate upward, so that the movable plate drives multiple positioning frames to rotate synchronously through the connecting rod, so that the positioning frames are embedded and pressed into the mounting hole to achieve positioning and sealing of the membrane body; S2. As the movable plate moves upward, the first push rod can be driven to rotate by the pull rope, so that the second push rod drives the roller to roll along the lower surface of the push plate, so as to push the push plate to drive the piston plate to move upward elastically. When the roller is separated from the push plate, the piston plate will elastically move downward and reset inside the top seat, and air will be injected into the inner side of the mounting frame through the exhaust pipe; S3. The detection plate will move downward under the action of air pressure. When the membrane is damaged, the detection plate will gradually move upward and reset under the action of the change in air pressure. At the same time, the marking pigment will be sprayed out through the atomizing nozzle, so that the pigment will leak through the damaged part to achieve marking. When the membrane is not damaged, the valve on the reflux pipe will be opened to achieve pigment recovery.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the protective film sealing detection device and the use method thereof can quickly seal and fix multiple groups of film bodies, and can automatically mark the leaks when poor sealing effects are detected. The specific contents are as follows; 1. It is equipped with a cylinder, a mounting frame and a positioning frame. Before testing, multiple membranes to be tested are flatly attached to the positioning adhesive of the mounting hole, and then the cylinder is controlled to push the movable plate upward. At this time, the movable plate will drive multiple positioning frames to rotate synchronously through the connecting rod, so that they are inserted into the mounting hole. At this time, the positioning frame can press the edge of the membrane, so that the membrane is sealed and attached to the mounting frame, realizing the rapid sealing installation of multiple membranes; 2. A first push rod, a second push rod, a roller and a piston plate are provided. As the movable plate moves upward, the first push rods can be pulled by a pull rope to rotate elastically, so that the first push rod drives the roller to roll against the lower surface of the push plate through the second push rod, thereby driving the push plate to drive the piston plate to move upward in the top seat, so that the top seat inhales air through the intake pipe, and when the roller is separated from the push plate, the piston plate automatically resets and moves downward, and the top seat automatically injects air into the inner side of the mounting frame through the exhaust pipe, which is convenient for subsequent detection; 3. A detection plate is provided. When there is a hole in the membrane, the air pressure inside the mounting frame will gradually decrease, causing the detection plate to move upward under the elastic force of the second spring, thereby determining whether there is a hole in the membrane; 4. A first liquid capsule, a second liquid capsule and a liquid storage tank are provided. As the detection plate moves downward, it can pull the second liquid capsule so that the second liquid capsule can extract the marking dye in the liquid storage tank through the pipette. When leakage occurs, the detection plate will move upward to squeeze the second liquid capsule, so that the marking dye sucked into the second liquid capsule will be evenly sprayed out through the atomizing nozzle, so that the atomized dye can be discharged through the leak with the air flow, thereby realizing automatic marking of the leak. When the detection plate is not reset to move upward or stops moving upward, there is no leak in the part of the membrane above it. After opening the valve on the reflux pipe, the dye in the second liquid capsule can be recovered after the detection is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a bottom view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the split structure of the mounting frame and the positioning frame of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the top seat of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7 This is a schematic diagram of the installation structure of the detection board of the present invention; Figure 8 It is a schematic diagram of the connection structure between the first liquid capsule and the second liquid capsule of the present invention.

[0018] In the figure: 1. base; 2. cylinder; 3. movable plate; 4. mounting frame; 5. mounting hole; 6. positioning adhesive; 7. positioning frame; 8. connecting rod; 9. membrane; 10. top seat; 11. first push rod; 12. second push rod; 13. roller; 14. baffle; 15. pull rope; 16. guide wheel; 17. push plate; 18. first spring; 19. piston plate; 20. intake pipe; 21. exhaust pipe; 22. detection plate; 23. second spring; 24. bottom plate; 25. first liquid capsule; 26. second liquid capsule; 27. liquid storage tank; 28. suction pipe; 29. ​​atomizing nozzle; 30. return pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-Figure 4 As shown, the existing protective film sealing detection device is not convenient for conveniently sealing and fixing multiple groups of protective films to be tested, and the detection efficiency is limited. In order to solve this technical problem, this embodiment discloses the following technical content; A protective film sealing detection device comprises a base 1 placed on a workbench, a cylinder 2 is fixedly installed at the middle position of the upper surface of the base 1, and a mounting frame 4 is fixedly installed above the base 1, and a mounting hole 5 for mounting a film body 9 is opened on the mounting frame 4; It also includes: a movable plate 3, fixedly mounted on the output end of the cylinder 2; a positioning assembly, mounted on the mounting frame 4, and driven by the movable plate 3 to seal and fix the membrane body 9 in the mounting hole 5; The mounting hole 5 is arranged in a stepped manner, and the positioning assembly includes a positioning adhesive 6 fixedly mounted on the inner wall of the mounting hole 5, and a membrane 9 is adhered to the outer side of the positioning adhesive 6. At the same time, a positioning frame 7 is rotatably connected to the outer side of the mounting hole 5, and a connecting rod 8 is hinged between the positioning frame 7 and the movable plate 3.

[0021] By adopting the above technical solution, the membrane body 9 to be tested is flatly attached to the positioning adhesive 6 of the mounting hole 5, and then the cylinder 2 is started, so that the cylinder 2 pushes the movable plate 3 to move upward. At this time, the movable plate 3 will drive multiple positioning frames 7 to rotate through the connecting rod 8, so that the positioning frames 7 are embedded and installed in the mounting hole 5, thereby squeezing the membrane body 9 to ensure that the membrane body 9 can be stably and sealedly connected to the mounting frame 4.

[0022] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above embodiment 1. The existing protective film sealing detection device is inconvenient to mark the specific leak position of the protective film during the detection process, which increases the difficulty of subsequent leak measurement and analysis. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 3 and Figure 5-Figure 8 As shown; The gas delivery component is installed on the top of the mounting frame 4. A transmission component is connected between the gas delivery component and the movable plate 3. During the movement of the movable plate 3, the gas delivery component is driven by the transmission component to deliver gas to the inner side of the mounting frame 4. The detection plate 22 is slidably mounted on the inner side of the mounting frame 4, a bottom plate 24 is mounted on the bottom of the mounting frame 4, a second spring 23 is connected between the detection plate 22 and the bottom plate 24, an infusion component is connected between the detection plate 22 and the mounting frame 4, a liquid storage bin 27 is fixedly mounted on the outer side of the mounting frame 4, and a suction tube 28 and a return tube 30 are connected between the infusion component and the liquid storage bin 27; The gas delivery assembly includes a top seat 10 fixedly mounted on the top of the mounting frame 4, and the transmission assembly includes a first push rod 11 elastically rotatably mounted on the top seat 10, and a pull rope 15 is wound around the shaft of the first push rod 11, and the lower end of the pull rope 15 is fixedly connected to the movable plate 3, and a guide wheel 16 is rotatably mounted on the lower end of the mounting frame 4, and the pull rope 15 is attached to the outer side of the guide wheel 16.

[0023] The second push rod 12 is elastically rotatably mounted on one end of the first push rod 11 close to the center of the top seat 10, and a roller 13 is rotatably mounted on the top of the second push rod 12. A baffle 14 is fixedly mounted on the lower surface of one end of the first push rod 11 close to the second push rod 12, and the baffle 14 limits the clockwise rotation angle of the second push rod 12.

[0024] The gas delivery component also includes a piston plate 19 which is slidingly arranged on the inner side of the top seat 10 in an interference fit manner, and a first spring 18 is connected between the piston plate 19 and the top seat 10, and a push plate 17 is fixedly connected to the top of the piston plate 19 through a rod body, and the push plate 17 is located above the top seat 10, and the roller 13 is initially attached to the lower surface of the push plate 17, and the push plate 17 is pushed upward by the second push rod 12 and the roller 13 during the rotation of the first push rod 11.

[0025] The lower end of the top seat 10 is connected to an air intake pipe 20 and an exhaust pipe 21 respectively, and the exhaust pipe 21 passes through the top of the mounting frame 4, and a one-way valve structure is provided on the air intake pipe 20 and the exhaust pipe 21.

[0026] The side wall of the detection plate 22 is sealed and attached to the mounting frame 4 and the membrane body 9 , and the detection plate 22 elastically moves downward along the inner side of the mounting frame 4 under the action of the air pressure inside the mounting frame 4 .

[0027] The infusion component includes a second liquid capsule 26 fixedly connected between the detection plate 22 and the mounting frame 4, and the upper end of the second liquid capsule 26 is connected to the first liquid capsule 25, an atomizing nozzle 29 is fixedly installed on the upper end of the detection plate 22, and a pressure valve structure is arranged on the inner side of the atomizing nozzle 29, and the second liquid capsule 26 and the atomizing nozzle 29 are connected by a one-way flow pipe, and the first liquid capsule 25 and the liquid storage tank 27 are connected by a one-way infusion suction tube 28, and during the lifting and lowering movement of the detection plate 22, the marking pigment in the liquid storage tank 27 is extracted through the first liquid capsule 25 and the second liquid capsule 26, and the pigment is sprayed out and atomized through the atomizing nozzle 29.

[0028] A valve is installed on the reflux pipe 30 connected between the first liquid capsule 25 and the liquid storage bin 27, and the valve is opened after the detection plate 22 stops moving.

[0029] By adopting the above technical solution, as the movable plate 3 moves upward, it will pull multiple first push rods 11 to rotate synchronously through the pull rope 15. At this time, the first push rod 11 will drive the roller 13 to roll along the lower surface of the push plate 17 through the second push rod 12 connected to its end. At this time, the baffle 14 can prevent the first push rod 11 and the second push rod 12 from rotating relative to each other. As the roller 13 rolls, it can drive the push plate 17 to move upward, and then drive the piston plate 19 to move synchronously upward on the inner side of the top seat 10. At this time, the top seat 10 can absorb external air through the intake pipe 20, and when the roller 13 is separated from the push plate 17, the piston plate 19 can be reset under the elastic force of the first spring 18, so that the top seat 10 can automatically inject air to the inner side of the mounting frame 4 through the exhaust pipe 21. At this time, the detection plate 22 can move along the mounting frame 4 under the action of negative pressure. The inner side of the frame 4 moves downward, and the outer wall of the detection plate 22 is always sealed against the membrane body 9. At this time, the detection plate 22 will stretch the second liquid capsule 26, so that the first liquid capsule 25 and the second liquid capsule 26 can automatically extract the marking pigment in the liquid storage bin 27 through the pipette 28. When there are no holes in the membrane body 9, the detection plate 22 remains stationary after the downward movement. At this time, the valve on the reflux pipe 30 is controlled to open, and then the movable plate 3 is controlled to move downward and reset, so that the fixation of the membrane body 9 can be released, so that the detection plate 22 can be reset and moved upward, so that the pigment in the second liquid capsule 26 can be squeezed into the liquid storage bin 27 through the reflux pipe 30. At the same time, the first push rod 11 will reset and rotate, and the second push rod 12 will rotate after contacting the upper surface of the push plate 17 to avoid the push plate 17. When the second push rod 12 moves to the bottom of the push plate 17, it will rotate and reset again; When there is a hole in the membrane body 9, the air pressure inside the mounting frame 4 will gradually decrease, causing the detection plate 22 to gradually move up and reset. At this time, the second liquid capsule 26 will be pressurized, so that the marking pigment sucked inside it will be sprayed out through the atomizing nozzle 29, so that the atomized pigment can pass through the hole with the air flow, thereby marking the hole and facilitating the subsequent search for the hole.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective film sealing detection device, comprising a base (1) placed on a workbench, wherein a cylinder (2) is fixedly mounted in the middle of the upper surface of the base (1), and a mounting frame (4) is fixedly mounted above the base (1), and a mounting hole (5) for mounting a film body (9) is provided on the mounting frame (4); It is characterized in that Also includes: A movable plate (3) is fixedly mounted on the output end of the cylinder (2); A positioning component is mounted on the mounting frame (4) and is driven by the movable plate (3) to seal and fix the membrane body (9) in the mounting hole (5); A gas delivery component is installed on the top of the mounting frame (4), a transmission component is connected between the gas delivery component and the movable plate (3), and during the movement of the movable plate (3), the transmission component drives the gas delivery component to deliver gas to the inner side of the mounting frame (4); The detection plate (22) is slidably mounted on the inner side of the mounting frame (4); a bottom plate (24) is mounted on the bottom of the mounting frame (4); a second spring (23) is connected between the detection plate (22) and the bottom plate (24); an infusion component is connected between the detection plate (22) and the mounting frame (4); a liquid storage bin (27) is fixedly mounted on the outer side of the mounting frame (4); and a liquid suction tube (28) and a return tube (30) are connected between the infusion component and the liquid storage bin (27).

2. A protective film sealing detection device according to claim 1, characterized in that: The mounting hole (5) is arranged in a stepped manner, and the positioning assembly comprises a positioning adhesive (6) fixedly mounted on the inner wall of the mounting hole (5), and a membrane (9) is bonded to the outer side of the positioning adhesive (6), and a positioning frame (7) is rotatably connected to the outer side of the mounting hole (5), and a connecting rod (8) is hinged between the positioning frame (7) and the movable plate (3).

3. A protective film sealing detection device according to claim 1, characterized in that: The gas delivery assembly comprises a top seat (10) fixedly mounted on the top of the mounting frame (4), and the transmission assembly comprises a first push rod (11) elastically rotatably mounted on the top seat (10), and a pull rope (15) is wound around the shaft of the first push rod (11), and the lower end of the pull rope (15) is fixedly connected to the movable plate (3), and a guide wheel (16) is rotatably mounted on the lower end of the mounting frame (4), and the pull rope (15) is attached to the outer side of the guide wheel (16).

4. A protective film sealing detection device according to claim 3, characterized in that: A second push rod (12) is elastically rotatably mounted on one end of the first push rod (11) close to the center of the top seat (10), and a roller (13) is rotatably mounted on the top of the second push rod (12). A baffle (14) is fixedly arranged on the lower surface of one end of the first push rod (11) close to the second push rod (12), and the baffle (14) limits the clockwise rotation angle of the second push rod (12).

5. A protective film sealing detection device according to claim 4, characterized in that: The gas delivery assembly also includes a piston plate (19) which is arranged on the inner side of the top seat (10) in an interference sliding manner, and a first spring (18) is connected between the piston plate (19) and the top seat (10), and the top of the piston plate (19) is fixedly connected to a push plate (17) via a rod body, and the push plate (17) is located above the top seat (10), and the roller (13) is initially attached to the lower surface of the push plate (17), and during the rotation of the first push rod (11), the push plate (17) is pushed upward by the second push rod (12) and the roller (13).

6. A protective film sealing detection device according to claim 5, characterized in that: The lower end of the top seat (10) is respectively connected to an air intake pipe (20) and an exhaust pipe (21), and the exhaust pipe (21) passes through the top of the mounting frame (4), and both the air intake pipe (20) and the exhaust pipe (21) are provided with a one-way valve structure.

7. The protective film sealing detection device according to claim 1, characterized in that: The side wall of the detection plate (22) is sealed and adhered to the mounting frame (4) and the membrane body (9), and the detection plate (22) elastically moves downward along the inner side of the mounting frame (4) under the action of the internal air pressure of the mounting frame (4).

8. The protective film sealing detection device according to claim 1, characterized in that: The infusion assembly comprises a second liquid capsule (26) fixedly connected between the detection plate (22) and the mounting frame (4), and the upper end of the second liquid capsule (26) is connected to the first liquid capsule (25), the upper end of the detection plate (22) is fixedly mounted with an atomizing nozzle (29), and the inner side of the atomizing nozzle (29) is provided with a pressure valve structure, and the second liquid capsule (26) and the atomizing nozzle (29) are connected via a one-way flow pipe, and the first liquid capsule (25) and the liquid storage bin (27) are connected via a one-way infusion suction pipe (28), and during the lifting and lowering movement of the detection plate (22), the marking pigment in the liquid storage bin (27) is extracted via the first liquid capsule (25) and the second liquid capsule (26), and the pigment is sprayed out and atomized via the atomizing nozzle (29).

9. A protective film sealing detection device according to claim 8, characterized in that: A valve is installed on the return pipe (30) connected between the first liquid capsule (25) and the liquid storage bin (27), and the valve is opened after the detection plate (22) stops moving.

10. A method for using a protective film sealing detection device, characterized in that: The steps include: S1. The membrane body (9) is evenly pasted on the positioning adhesive (6) of the mounting hole (5), and the cylinder (2) is controlled to push the movable plate (3) upward, so that the movable plate (3) drives the plurality of positioning frames (7) to rotate synchronously through the connecting rod (8), so that the positioning frames (7) are embedded and pressed into the mounting hole (5), thereby achieving positioning and sealing of the membrane body (9); S2. As the movable plate (3) moves upward, the first push rod (11) can be driven to rotate by the pull rope (15), so that the second push rod (12) drives the roller (13) to roll along the lower surface of the push plate (17), so as to push the push plate (17) to drive the piston plate (19) to move upward elastically. When the roller (13) is separated from the push plate (17), the piston plate (19) will elastically move downward and reset inside the top seat (10), and air will be injected into the inner side of the mounting frame (4) through the exhaust pipe (21); S3. The detection plate (22) will move downward under the action of air pressure. When the membrane (9) is damaged, the detection plate (22) will gradually move upward and reset under the action of the change in air pressure. At the same time, the marking pigment is sprayed through the atomizing nozzle (29), so that the pigment leaks through the damaged part to achieve marking. When the membrane (9) is not damaged, the valve on the return pipe (30) is opened to achieve pigment recovery.

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