阅读说明：本技术 组合式塑料薄膜测漏装置 (Combined plastic film leakage detection device ) 是由 不公告发明人 于 2020-09-23 设计创作，主要内容包括：本发明公开了一种组合式塑料薄膜测漏装置,该薄膜测漏装置包括外壳、变速传动机构、测漏机构,所述变速传动机构设置在外壳上,变速传动机构上设置有负压夹持机构,所述测漏机构设置在变速传动机构的中间位置,所述负压夹持机构通过负压对薄膜进行夹持,负压夹持机构通过变速传动机构对薄膜进行拉伸,所述测漏机构对拉伸后的薄膜进行测漏。变速传动机构通过变速使负压夹持机构对薄膜进行横向拉伸,并在传动过程中通过导轨使负压夹持机构对薄膜进行纵向拉伸,使薄膜完全被拉伸开,测漏机构通过溶液与气体的化学反应对薄膜进行测漏,使得薄膜在传输过程中完成测漏,本发明具有不间断测试薄膜的效果。(The invention discloses a combined plastic film leakage detection device which comprises a shell, a variable speed transmission mechanism and a leakage detection mechanism, wherein the variable speed transmission mechanism is arranged on the shell, a negative pressure clamping mechanism is arranged on the variable speed transmission mechanism, the leakage detection mechanism is arranged in the middle of the variable speed transmission mechanism, the negative pressure clamping mechanism clamps a film through negative pressure, the negative pressure clamping mechanism stretches the film through the variable speed transmission mechanism, and the leakage detection mechanism detects leakage of the stretched film. The variable-speed transmission mechanism enables the negative pressure clamping mechanism to transversely stretch the film through variable speed, and enables the negative pressure clamping mechanism to longitudinally stretch the film through the guide rail in the transmission process, so that the film is completely stretched, and the leakage detection mechanism detects the leakage of the film through the chemical reaction of the solution and the gas, so that the leakage detection of the film is completed in the transmission process.)

1. The utility model provides a modular plastic film device that leaks hunting which characterized in that: the film leakage detection device comprises a shell (1), a variable speed transmission mechanism (2) and a leakage detection mechanism (4), wherein the variable speed transmission mechanism (2) is arranged on the shell (1), a negative pressure clamping mechanism (3) is arranged on the variable speed transmission mechanism (2), the leakage detection mechanism (4) is arranged in the middle of the variable speed transmission mechanism (2), the negative pressure clamping mechanism (3) clamps a film through negative pressure, the negative pressure clamping mechanism (3) stretches the film through the variable speed transmission mechanism (2), and the leakage detection mechanism (4) detects leakage of the stretched film;

the variable-speed transmission mechanism (2) comprises two groups of variable-speed transmission boxes (2-1), the two groups of variable-speed transmission boxes (2-1) are arranged on two sides in the shell (1), and the two groups of variable-speed transmission boxes (2-1) respectively comprise a plurality of groups of transmission shafts; the negative pressure clamping mechanism (3) comprises a plurality of groups of clamping assemblies, the plurality of groups of clamping assemblies are arranged on each group of transmission shafts, and the plurality of groups of clamping assemblies are positioned between the two groups of variable speed transmission boxes (2-1);

the two groups of speed change transmission boxes (2-1) are internally provided with walking guide rails (2-2) and transmission belt components arranged on the inner sides of the walking guide rails (2-2), a plurality of groups of transmission shafts are positioned between the walking guide rails (2-2) and the transmission belt components, and the transmission shafts are rotatably connected with the walking guide rails (2-2) and the transmission belt components;

the transmission shafts of the multiple groups respectively comprise a sleeve (2-3) and a support shaft (2-4) arranged inside the sleeve (2-3), the sleeve (2-3) is rotatably connected with the walking guide rail (2-2) and the transmission belt component, one end, far away from the inner wall of the shell (1), of the support shaft (2-4) is provided with a support ring (2-5), and a rotating ball is arranged in the support ring (2-5); a lower support guide rail (2-6) is arranged below the rotating ball on the end face of one side, far away from the shell (1), of the variable speed transmission case (2-1), an upper support guide rail (2-7) is arranged above the rotating ball on one side, far away from the shell (1), of the transmission belt assembly, and the rotating ball is rotatably connected with the upper support guide rail (2-7) and the lower support guide rail (2-6);

connecting rods are arranged on the end faces of one sides of the groups of support rings (2-5) far away from the support shafts (2-4), and clamping assemblies are fixed at the lower ends of the groups of connecting rods; the two groups of conveying belt assemblies respectively comprise two groups of mounting plates (2-8), the two groups of mounting plates (2-8) close to the inner wall of the variable-speed transmission box (2-1) are fixed with the variable-speed transmission box (2-1), a slow conveying belt (2-9) and a fast conveying belt (2-10) are arranged between the two groups of mounting plates (2-8), the slow conveying belt (2-9) is of an inverted concave structure, the fast conveying belt (2-10) is positioned on one concave side of the slow conveying belt (2-9), and the sleeve (2-3) is respectively rotatably connected with the slow conveying belt (2-9) and the fast conveying belt (2-10);

the clamping assemblies comprise a bearing plate (3-1), the upper end of the bearing plate (3-1) is fixed with a connecting rod, a plurality of groups of adsorption shafts (3-2) are arranged on two sides of the bearing plate (3-1), two groups of the adsorption shafts (3-2) are connected with the bearing plate (3-1) in a sliding mode, the adsorption shafts (3-2) are connected in the sliding mode, the lower end of the bearing plate (3-1) and the lower ends of the adsorption shafts (3-2) are provided with friction plates (3-3).

2. The combined plastic film leakage detection device of claim 1, wherein: the novel bearing plate is characterized in that sliding grooves are formed in two ends of the interior of the bearing plate (3-1), one side, far away from the bearing plate (3-1), of each group of adsorption shafts (3-2) is provided with the sliding grooves inwards, one ends, close to the center line of the bearing plate (3-1), of the interiors of a plurality of groups of sliding grooves are provided with telescopic air bags (3-5), one sides, close to the bearing plate (3-1), of the adsorption shafts (3-2) of the plurality of groups are provided with sliding plates (3-4), the sliding plates (3-4) of the plurality of groups are embedded into the sliding grooves of the plurality of groups respectively, and the sliding plates (3-4) are fixed with one ends of the telescopic air bags (3-5).

3. The combined plastic film leakage detection device of claim 2, wherein: an adsorption pump and a telescopic pump are arranged in the bearing plate (3-1), and the telescopic pump is connected with a plurality of groups of telescopic air bags (3-5) through pipelines; the friction plates (3-3) of a plurality of groups are all provided with adsorption discs (3-6), and the adsorption discs (3-6) of a plurality of groups are all connected with an adsorption pump pipeline.

Technical Field

The invention relates to the technical field of plastic film leakage detection, in particular to a combined plastic film leakage detection device.

Background

To meet the zero-vent tolerance requirements for plastic films in the industry, for example: flow cells, proton exchange membranes for fuel cells, carbon plates, and the like, typically require leak detection of the membrane.

For example, a pem fuel cell bipolar plate serves to transport fuel gas, oxidant, and heat during stack operation, and thus comprises three conducting portions of fuel gas, oxidant, and coolant, where the fuel gas is typically hydrogen, the oxidant is typically air, and the coolant is typically water. The coolant conducting part is positioned between the oxidant and the fuel gas conducting part, and when the device is used, the tightness between the coolant conducting part and the fuel gas and oxidant conducting part needs to be ensured, otherwise, the gas is overflowed, and if the hydrogen and the air are mixed, the danger of combustion and even explosion can occur. Therefore, detection of film porosity is particularly important.

In the prior art, for example, the chinese patent application publication No. CN102297748A discloses a "leakage detection device and detection method for a thin film", which includes a base with a groove, a perforated plate or a rigid screen used as a support, and a hollow annular upper cover, wherein an air inlet penetrating through the base is formed on the inner wall of the groove, the annular upper cover and the base are locked by a bolt and a nut, the perforated plate or the rigid screen is tightly pressed between the base and the annular upper cover, an external pressure gauge introduces air into the groove through the air inlet of the base, and the thin film is subjected to leakage detection by an air pressure method.

For the above patent, although the film leakage detecting device has made a certain breakthrough in structural design and usability, there still exist some defects, such as long time, low efficiency, high detection cost, poor precision, inability to mark the position with air holes, inability to continuously detect the film in large batch, and susceptibility to damage of the detected material, and inability to meet the requirement of industrial mass production.

Disclosure of Invention

The invention aims to provide a combined plastic film leakage detection device to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a modular plastic film device that leaks hunting, this film device that leaks hunting include shell, variable speed drive mechanism, mechanism that leaks hunting, variable speed drive mechanism sets up on the shell, is provided with negative pressure fixture on the variable speed drive mechanism, mechanism that leaks hunting sets up the intermediate position at variable speed drive mechanism, negative pressure fixture carries out the centre gripping through the negative pressure to the film, and negative pressure fixture stretches the film through variable speed drive mechanism, mechanism that leaks hunting is carried out to the film after the stretching. The variable-speed transmission mechanism enables the negative pressure clamping mechanism to transversely stretch the film through variable speed, and enables the negative pressure clamping mechanism to longitudinally stretch the film through the guide rail in the transmission process, so that the film is completely stretched, and the leakage detection mechanism detects the leakage of the film through the chemical reaction of the solution and the gas, so that the leakage detection of the film is completed in the transmission process.

As a preferred technical scheme, the variable speed transmission mechanism comprises two groups of variable speed transmission boxes, the two groups of variable speed transmission boxes are arranged on two sides inside the shell, and each group of variable speed transmission boxes comprises a plurality of groups of transmission shafts; the negative pressure clamping mechanism comprises a plurality of groups of clamping assemblies, the clamping assemblies are arranged on each group of transmission shafts, and the clamping assemblies are located between the two groups of variable-speed transmission boxes. The variable speed transmission case provides power for the rotation of transmission shaft, makes to pull open the distance between a plurality of groups transmission shaft simultaneously through the rotational speed of difference, realizes the horizontal drawing to the film, and the transmission shaft provides the support for the installation of centre gripping subassembly, makes the centre gripping subassembly at the device mesocycle centre gripping, and the centre gripping subassembly adsorbs the film through the negative pressure, and the film of adsorbing the part is transversely stretched through flexible simultaneously.

As a preferred technical scheme, two sets of the transmission gear boxes are internally provided with walking guide rails and transmission belt assemblies arranged on the inner sides of the walking guide rails, the transmission shafts are arranged between the walking guide rails and the transmission belt assemblies, and the transmission shafts are rotatably connected with the walking guide rails and the transmission belt assemblies. The walking guide rail and the transmission band subassembly mutually cooperate and make the transmission shaft circulate in the device and move for can carry out incessant leak hunting test to the film, the walking guide rail provides the basis for the removal of transmission shaft, and the transmission band subassembly provides power for the removal of transmission shaft.

According to a preferable technical scheme, the transmission shafts comprise sleeves and support shafts arranged inside the sleeves, the sleeves are rotatably connected with the walking guide rails and the transmission belt assemblies, one ends of the support shafts, far away from the inner wall of the shell, are provided with support rings, and rotating balls are arranged in the support rings; the variable speed transmission case is provided with a lower support guide rail below the rotating ball on the end face far away from one side of the shell, an upper support guide rail is arranged above the rotating ball on one side of the transmission belt assembly far away from the shell, and the rotating ball is rotatably connected with the upper support guide rail and the lower support guide rail. The sleeve pipe provides the basis for the removal of transmission shaft, and simultaneously, installation for the back shaft provides the support, rotate between back shaft and the sleeve pipe and be connected, make the sleeve pipe when rotating, the centre gripping subassembly passes through the back shaft and is in perpendicular decurrent state all the time, the support ring provides the support for the installation of rolling ball, the back shaft obtains the balanced support of the other end through support ring and rolling ball, the lower support guide rail provides the track for the rotation of rolling ball with last support guide rail, and simultaneously, make through orbital change and support the axial other end and remove, make the centre gripping subassembly to the film tensile to both sides, thereby realize the vertical stretching to the film, through horizontal and fore-and-aft stretching, make the film be in the similar state after by the air inflation, make things convenient for follow-up to the hourglass processing of film.

As a preferred technical scheme, connecting rods are arranged on the end faces of one sides of a plurality of groups of the supporting rings, which are far away from the supporting shaft, and clamping assemblies are fixed at the lower ends of the groups of the connecting rods; two sets of the conveyer belt subassembly all includes two sets of mounting panels, and two sets of mounting panels that are close to the variable speed transmission case inner wall are fixed with the variable speed transmission case, and are two sets of all be provided with slow transmission band, quick transmission band between the mounting panel, the concave type structure of slow transmission band for invering, quick transmission band is located slow transmission band and is concave type one side, the sleeve pipe rotates with slow transmission band, quick transmission band respectively and is connected. The connecting rod provides the support for connecting the centre gripping subassembly, the mounting panel provides the support for the installation of transmission band, the slow speed transmission band provides power for the slow movement of transmission shaft, make the centre gripping subassembly more stable absorption film under the state of slow movement, the fast speed transmission band provides power for the fast movement of transmission shaft, make pull open the distance between per two sets of transmission shafts, the centre gripping subassembly carries out the self-stretching when transmission shaft fast movement, make by absorbent film part also stretched equally, the slow speed transmission band provides the basis through the concave type butt joint that sets up to fast speed transmission band and transmission shaft.

As a preferred technical scheme, the lower end face of the fast conveying belt is lower than the lower end face of the slow conveying belt; be provided with the gear area on the walking guide rail inner wall, the gear area is located the outside of slow speed transmission band, and gear area both ends do not link up and the opening is located the concave type below of slow speed transmission band, still be provided with on the walking guide rail inner wall and link up the gear area, it is located the below of quick transmission band to link up the gear area, the upper end that links up the gear area is less than the upper end in gear area. The gear area with link up the gear area and set up the rotation that provides the basis for the transmission shaft, simultaneously, through the setting of different positions, accomplish the basis that transmission shaft and slow transmission band separation and be connected with quick transmission band.

According to the preferable technical scheme, the plurality of groups of clamping assemblies respectively comprise a bearing plate, the upper end of the bearing plate is fixed with the connecting rod, a plurality of groups of adsorption shafts are arranged on two sides of the bearing plate, the two groups of adsorption shafts are respectively connected with the bearing plate in a sliding mode and are connected with each other in a sliding mode, and friction plates are arranged at the lower end of each of the bearing plate and the lower ends of the plurality of groups of adsorption shafts. The loading board provides the basis for the installation of absorption axle and the connection of transmission shaft, and the absorption axle adsorbs the film through the negative pressure, strengthens being connected through the friction plate between and the film, and the absorption axle is the loading board and with sliding connection between each other for self-extension provides the support.

According to the preferable technical scheme, sliding grooves are formed in two ends of the interior of the bearing plate, one side, away from the bearing plate, of each group of adsorption shafts is provided with the sliding groove inwards, telescopic air bags are arranged at one ends, close to the central line of the bearing plate, of the interiors of the sliding grooves, sliding plates are arranged at one sides, close to the bearing plate, of the groups of adsorption shafts, the sliding plates are embedded into the sliding grooves of the groups respectively, and the sliding plates are fixed with one ends of the telescopic air bags. The sliding groove provides a foundation for the connection between the adsorption shaft and the bearing plate and between the adsorption shaft and the adsorption shaft, the sliding plate provides support for sliding connection, and the telescopic air bag provides power for self-extension after being inflated.

As a preferred technical scheme, an adsorption pump and a telescopic pump are arranged in the bearing plate, and the telescopic pump is connected with a plurality of groups of telescopic air bag pipelines; and the friction plates are all provided with adsorption discs, and the adsorption discs of the groups are all connected with an adsorption pump pipeline. The adsorption pump provides power for adsorption disc adsorption film, and the expansion pump provides aerodynamic for the extension of flexible gasbag, and the adsorption disc provides the support for centre gripping subassembly adsorption film.

According to a preferable technical scheme, the leakage detection mechanism comprises a liquid storage box and an air pressure box, the liquid storage box and the air pressure box are located between the two groups of variable speed transmission boxes, the liquid storage box is fixed to the upper end face inside the shell, the air pressure box is fixed to the lower end face inside the shell, and the air pressure box is located below the plurality of groups of clamping assemblies. The liquid reserve tank stores the solution of participating in chemical reaction, and spray the up end of film with solution, the atmospheric pressure case is the box of up end, pass through from the atmospheric pressure case upper end behind the centre gripping subassembly absorption film, and make the film hug closely the up end at the atmospheric pressure case, thereby prevent the gas leakage in the atmospheric pressure case, when having the gas pocket on the film, gas removes the up end of film and carries out chemical reaction with solution from the gas pocket, make the colour of solution change, thereby make things convenient for operating personnel to learn the position that the film has the gas pocket.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the variable-speed transmission mechanism enables the negative-pressure clamping mechanism to transversely stretch the film through variable speed, and enables the negative-pressure clamping mechanism to longitudinally stretch the film through the guide rail in the transmission process, so that the film is completely stretched, which is equivalent to the effect of expanding the film through air in the transmission process, the waiting time in the film leakage detection process is shortened, and the leakage detection efficiency is improved.

2. According to the invention, the leakage detection mechanism detects the leakage of the stretched film through the colored solution and the gas, when the film is provided with the air holes, the gas is contacted with the solution and performs a chemical reaction, so that the color of the solution of the film with the air holes is changed, the leakage detection of the film in the transmission process is completed, in addition, in the leakage detection process, the device does not need to be stopped, the film can be uninterruptedly measured, the leakage detection efficiency is further improved, and the requirement of industrial large-scale production is met.

3. According to the invention, the film is adsorbed by the negative pressure clamping mechanism through negative pressure, the rubber pad is arranged at the position in contact with the film, the friction force between the negative pressure clamping mechanism and the film is increased, the film material is not damaged, and the part adsorbed by the negative pressure is transversely stretched through the self-stretching of the negative pressure clamping mechanism, so that the adsorbed part of the film participates in leak detection, and all parts of the film can be subjected to leak detection and subsequent use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a top plan view of the overall structure of the present invention;

FIG. 2 is a front half-section schematic view of the overall structure of the present invention;

FIG. 3 is a left side schematic view of the overall structure of the present invention;

FIG. 4 is a schematic front view of the internal construction of the transmission of the present invention;

FIG. 5 is a schematic view of the overall structure of the negative pressure clamping mechanism of the present invention;

fig. 6 is an extended schematic view of the negative pressure clamping mechanism of the present invention.

In the figure: 1. a housing; 2. a variable speed drive mechanism; 3. a negative pressure clamping mechanism; 4. a leak detection mechanism; 2-1, a variable speed transmission case; 2-2, a walking guide rail; 2-3, sleeving a pipe; 2-4, supporting a shaft; 2-5, a support ring; 2-6, a lower supporting guide rail; 2-7, an upper support guide rail; 2-8, mounting a plate; 2-9, a slow speed transmission belt; 2-10, fast conveying belt; 3-1, carrying a plate; 3-2, an adsorption shaft; 3-3, friction plates; 3-4, a sliding plate; 3-5, a telescopic air bag; 3-6, an adsorption disc; 4-1, a liquid storage tank; 4-2, and a pneumatic box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a modular plastic film device that leaks hunting, this film device that leaks hunting includes shell 1, variable speed drive mechanism 2, leak hunting mechanism 4, variable speed drive mechanism 2 installs on shell 1, the last negative pressure fixture 3 of installing of variable speed drive mechanism 2, leak hunting mechanism 4 installs the intermediate position at variable speed drive mechanism 2, negative pressure fixture 3 carries out the centre gripping through the negative pressure to the film, negative pressure fixture 3 stretches the film through variable speed drive mechanism 2, leak hunting mechanism 4 leaks hunting to the film after stretching.

The variable speed transmission mechanism 2 comprises two groups of variable speed transmission boxes 2-1, the two groups of variable speed transmission boxes 2-1 are respectively arranged on the left side and the right side inside the shell 1, and a plurality of groups of transmission shafts are rotatably arranged on the two groups of variable speed transmission boxes 2-1.

The traveling guide rails 2-2 and the transmission belt assemblies positioned on the inner sides of the traveling guide rails 2-2 are fixedly arranged in the two groups of variable speed transmission boxes 2-1, the traveling guide rails 2-2 are rectangular, one sides of the transmission belt assemblies are fixed with the variable speed transmission boxes 2-1, the transmission shafts are positioned between the traveling guide rails 2-2 and the transmission belt assemblies, and the transmission shafts are rotatably connected with the traveling guide rails 2-2 and the transmission belt assemblies.

The two groups of transmission belt assemblies respectively comprise two groups of mounting plates 2-8, the two groups of mounting plates 2-8 close to the inner wall of the variable speed transmission box 2-1 are respectively fixed with the two groups of variable speed transmission boxes 2-1, a slow transmission belt 2-9 and a fast transmission belt 2-10 are respectively rotatably mounted between the two groups of mounting plates 2-8, the slow transmission belt 2-9 is of an inverted concave structure, the fast transmission belt 2-10 is positioned on the concave outer side of the slow transmission belt 2-9, namely one side close to the inner wall of the shell 1, and the lower end face of the fast transmission belt 2-10 is lower than the lower end face of the slow transmission belt 2-9.

A gear belt is fixed on the inner wall of the walking guide rail 2-2 and is positioned at the outer side of the slow speed transmission belt 2-9, two ends of the gear belt are not connected, an opening is positioned below the concave type of the slow speed transmission belt 2-9, a connecting gear belt is also fixed on the inner wall of the walking guide rail 2-2 and is positioned below the fast speed transmission belt 2-10, and the upper end of the connecting gear belt is lower than the upper end of the gear belt.

The transmission shafts comprise a sleeve 2-3 and a support shaft 2-4 rotatably mounted in the sleeve 2-3, gear teeth are machined on the outer wall of the sleeve 2-3, and the sleeve 2-3 is rotatably connected with the traveling guide rail 2-2, the slow transmission belt 2-9 and the fast transmission belt 2-10 through the gear teeth.

A sliding groove is processed on the inner wall of the variable speed transmission case 2-1 corresponding to the position of the support shaft 2-4, when a film is longitudinally stretched, a space is provided for the support shaft 2-4 to move towards the outer side, a support ring 2-5 is fixed at one end of the support shaft 2-4 far away from the inner wall of the shell 1, a rotating ball is rotatably installed in the support ring 2-5, and a connecting rod is horizontally fixed on the end surface of one side of the support rings 2-5 far away from the support shaft 2-4; lower supporting guide rails 2-6 are fixed on the end face of one side, far away from the shell 1, of the variable speed transmission case 2-1 and below the rotating ball, upper supporting guide rails 2-7 are fixed on the end face of one side, far away from the inner wall of the shell 1, of the two groups of mounting plates 2-8 and above the rotating ball, the rotating ball is rotatably connected with the upper supporting guide rails 2-7 and the lower supporting guide rails 2-6 respectively, and the middle positions of the upper supporting guide rails 2-7 and the lower supporting guide rails 2-6 are arc-shaped and extend outwards.

The negative pressure clamping mechanism 3 comprises a plurality of groups of clamping components, and the plurality of groups of clamping components are positioned between the two groups of variable speed transmission boxes 2-1.

The plurality of groups of clamping assemblies comprise a bearing plate 3-1, the upper end of the bearing plate 3-1 is fixed with the lower end of the connecting rod through a strut, three groups of adsorption shafts 3-2 are slidably mounted on the left side and the right side of the bearing plate 3-1, the three groups of adsorption shafts 3-2 on the left side and the right side are slidably connected, and friction plates 3-3 are fixed at the lower end of the bearing plate 3-1 and the lower ends of the six groups of adsorption shafts 3-2.

Sliding grooves are processed inwards on the end faces of the left side and the right side of the bearing plate 3-1, sliding grooves are processed inwards on one side, away from the bearing plate 3-1, of each group of adsorption shafts 3-2, telescopic air bags 3-5 are installed at one ends, close to the central line of the bearing plate 3-1, inside the groups of sliding grooves, springs are installed in the telescopic air bags 3-5 and provide assistance for resetting of the adsorption shafts 3-2, sliding plates 3-4 are fixed at one sides, close to the bearing plate 3-1, of the groups of adsorption shafts 3-2, the groups of sliding plates 3-4 are embedded into the groups of sliding grooves respectively, one ends of the sliding plates 3-4 are fixed with one ends of the telescopic air bags 3-5, and the sliding plates 3-4 are connected with the sliding grooves in a sliding mode.

The middle part of the bearing plate 3-1 is of a hollow structure, an adsorption pump (not shown in the figure) and a telescopic pump (not shown in the figure) are arranged in the bearing plate, and the telescopic pump is connected with a plurality of groups of telescopic air bags 3-5 through pipelines.

The friction plates 3-3 are made of rubber, the adsorption discs 3-6 are mounted in the friction plates 3-3, pipelines are processed in the adsorption shafts 3-2, and the adsorption discs 3-6 are all connected with the adsorption pump pipelines through the pipelines.

The leak detection mechanism 4 comprises a liquid storage tank 4-1 and an air pressure tank 4-2, the liquid storage tank 4-1 and the air pressure tank 4-2 are both positioned between two groups of variable speed transmission boxes 2-1, the liquid storage tank 4-1 is fixed with the upper end face inside the shell 1 through a connecting box, a solution participating in chemical reaction, such as a ferrous salt solution with color, is stored in the liquid storage tank 4-1, the connecting box is a box body, a water pump and an air pump are installed inside the connecting box, the air pump pumps gas into the air pressure tank 4-2, the water pump pumps the solution in the liquid storage tank 4-1 and sprays the solution onto a film through a water spray pipe, the film is in a state after being transversely and longitudinally stretched, the air pressure tank 4-2 is fixed with the lower end face inside the shell 1, the air pressure tank 4-2 is positioned below a plurality of groups of clamping components, and the liquid storage tanks 4-1 and the air pressure tank 4-2 are positioned in the middle of the upper supporting guide rail 2-7 and the lower supporting guide rail 2-6 The arc position, 4-2 of the air pressure box is a box body without an upper end surface, and gas which reacts with the solution to change the color of the solution, such as chlorine, is stored in the box body.

Leak hunting mechanism 4 still includes clean subassembly (not drawn in the picture), clean unit mount is in the one end that the device goes out the film, clean subassembly is by the motor, the roller, the sponge is constituteed, the sponge is fixed on the roller, place the roller level, there is the sponge in the first half of roller, the latter half does not have the sponge, clean subassembly clears up the solution on the film up end, when not having the gas pocket on the film, the motor rotates, the sponge is in the below of roller, the sponge is cleaned solution, when having the gas pocket on the film, the sponge is located the top of roller, the sponge is not cleaned the film, make things convenient for operating personnel to handle the film part that contains the gas pocket.

The working principle of the invention is as follows:

when the slow speed transmission belt 2-9 rotates, the transmission shaft is driven to rotate in the variable speed transmission case 2-1, and meanwhile, the support shaft 2-4 is rotatably connected with the sleeve 2-3, so that the negative pressure clamping mechanism 3 is always in a vertically downward state.

The film needing air hole detection is placed below the negative pressure clamping mechanism 3, air is extracted from the adsorption discs 3-6, the adsorption discs 3-6 adsorb the film, the film is adsorbed on the negative pressure clamping mechanism 3, meanwhile, the negative pressure clamping mechanism 3 is driven by the slow speed transmission belt 2-9 to move in the device, along with the rotation of the slow speed transmission belt 2-9, the film is adsorbed and transmitted by other transmission shafts with the negative pressure clamping mechanism 3 ceaselessly, and the film enters the device.

When the transmission shaft moves to the arc positions of the lower support guide rails 2-6 and the upper support guide rails 2-7, the transmission shaft starts to be rotationally connected with the rapid transmission belt 2-10, meanwhile, the support rings 2-5 enable the support shaft 2-4 to move outwards under the action of the rotating balls, the lower support guide rails 2-6 and the upper support guide rails 2-7, namely one side of the inner wall of the shell 1 moves, so that the negative pressure clamping mechanism 3 moves outwards, the film is longitudinally stretched, and the transmission shaft is rotationally connected with the rapid transmission belt 2-10, so that the transmission shaft and the transmission shaft behind the transmission shaft are separated by a distance, and the film between the two groups is transversely stretched.

When the film is stretched to the maximum extent, the liquid storage tank 4-1 sprays solution to the upper end face of the film through the liquid storage tank 4-1 and the air pressure tank 4-2, meanwhile, gas is infused into the air pressure tank 4-2, and the gas generates upward extrusion force on the film.

When the film has pores, the gas reacts with the solution on the upper end surface through the pores to discolor the solution, thereby marking the pores-containing portion. When the film is not provided with air holes, the cleaning component cleans the solution.

When the transmission shafts are rotationally connected with the slow transmission belts 2-9 again, the distance between the rear group of transmission shafts and the front group of transmission shafts is shortened, the thin film is transversely restored, and meanwhile, as the middle positions of the lower support guide rails 2-6 and the upper support guide rails 2-7 are arc-shaped, when the transmission shafts move towards the film outlet end of the device, the thin film is longitudinally restored firstly.

When the film is conveyed out of the device, the adsorption discs 3-6 are infused with air, so that the adsorption discs 3-6 are separated from the film, and the film is separated from the negative pressure clamping mechanism 3.

It is noted that, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.