A device for detecting air tightness of rubber bellows

Abstract

The invention discloses an air tightness detection device for a rubber bellows, which relates to the technical field of air tightness detection, and comprises a main frame, a clamping mechanism and a pressure generating device, wherein the main frame comprises an inner frame for supporting the rubber bellows, a water receiving tray slidably mounted on the bottom end of the inner frame and an outer frame covered on the outside of the inner frame, and a sensing belt for sensing water drops is arranged along the length direction of the water receiving tray; the inner frame and the outer frame are arranged at openings at both ends of the rubber bellows, so that the outer wall of the rubber bellows is clamped by the inner frame and the outer frame to form a sealing area, abandoning the traditional method of immersing the rubber bellows in water, and by means of the internal pressure difference of the rubber bellows, the water is forced out of the outer wall of the rubber bellows through the leakage point, so as to detect the air tightness of the rubber bellows, and the detection area is changed by the flow of water flow, so as to reduce the visual blind area, reduce the amount of water used and improve the air tightness detection efficiency.

Description

Technical Field

[0001] The invention relates to the field of air tightness detection, in particular to an air tightness detection device for a rubber bellows. Background Art

[0002] Rubber bellows is a special piping element, usually made of rubber material, with a corrugated shape, this design makes the bellows have good flexibility and elasticity.

[0003] A Chinese patent with authorization announcement number CN219573386U discloses an air tightness detection device for rubber bellows products, including a support platform, a control component, a water tank, a drive component, a fixture, a binding component and an air supply component. The water tank is fixedly installed on the upper part of the support platform, the fixture is arranged above the water tank, the binding component is used to bind the rubber bellows to be tested to the fixture, the drive component is installed on one side of the support platform and connected to the control component, the control component is used to control the drive component to drive the fixture to move up and down, and the air supply component is arranged on one side of the support platform for ventilating the inside of the fixture. The structure is simple and the operation is convenient. It can greatly reduce the visual fatigue of visual inspectors, and can efficiently and accurately detect air tightness problems such as through-type damage, and the adverse phenomenon can be accurately known to the operator.

[0004] The first method of testing rubber bellows is to use a sealed rubber bellows, pressurize the gas into it and then push the object back to determine whether the rubber bellows is leaking. However, due to its unique flexibility and elasticity, the air tightness test of rubber bellows becomes relatively complicated. This method often makes it difficult to accurately control the deformation of the bellows during the test, thus affecting the accuracy of the test results.

[0005] Secondly, water inspection is used to immerse the rubber bellows in water and observe whether bubbles appear at the leaking point to determine whether the rubber bellows is leaking. However, this method requires a water tank suitable for the rubber bellows and a large amount of water source. At the same time, due to water source fluctuations and implementation obstacles, there are blind spots, resulting in low detection efficiency.

[0006] To this end, the present invention proposes an air tightness detection device for a rubber bellows to solve the above problem. Summary of the invention

[0007] In view of the above problems in the prior art, the present invention is proposed.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: an air tightness detection device for a rubber bellows, comprising: a main frame, a clamping mechanism and a pressure generating device, the main frame comprising an inner frame for supporting the rubber bellows, a water receiving tray slidably mounted on the bottom end of the inner frame and an outer frame covered on the outside of the inner frame, a sensing belt for sensing water drops is installed along the length direction of the water receiving tray, the outer frame and the inner frame form a sealing area, and the sealing area seals the outer peripheral surface of the rubber bellows;

[0009] The clamping mechanism comprises an inner clamping structure and an outer clamping structure provided on the inner and outer surfaces of the rubber bellows, the outer clamping structure is contractionally attached to the outer surface of the rubber bellows, and the inner clamping structure supports the outer clamping structure through the rubber bellows;

[0010] The pressure generating device is used to extract gas from the sealing area to form a negative pressure in the sealing area;

[0011] Wherein, clamping mechanisms are installed at both ends of the rubber bellows, and a linkage rod is arranged between the clamping mechanism and the inner frame, so that a transmission arrangement is formed between the clamping mechanism and the inner frame through the linkage rod.

[0012] As a preferred solution of the air tightness detection device of the rubber bellows described in the present invention, there are two groups of inner frames, which are respectively arranged at both ends of the rubber bellows, and the inner frames include an outer fixing plate, an inner rotating plate and a positioning plate, wherein the outer fixing plate and the positioning plate have grooves for the inner rotating plate to engage with the surface walls thereof, and a positioning groove for the water receiving tray to pass through is provided at the bottom end of the outer fixing plate, wherein the positioning plate and the outer fixing plate are fixedly connected.

[0013] As a preferred solution of the air tightness detection device for a rubber bellows described in the present invention, wherein: a driving structure is provided on the inner frame, and the driving structure includes a motor fixed to an outer fixed plate, and a circular gear is fixed at one end of the motor output shaft passing through the outer fixed plate, a group of ring gears are fixed on one side of the inner rotating plate, and multiple groups of hexagonal sleeves are fixed on the other side, and the circular gears and the ring gears form a meshing transmission arrangement.

[0014] As a preferred solution of the air tightness detection device for a rubber bellows described in the present invention, multiple groups of hexagonal sleeves are distributed in an annular manner at equal intervals on the surface of the inner rotating plate, each group of hexagonal sleeves has multiple number, and the intervals between the multiple hexagonal sleeves are equal.

[0015] As a preferred solution of the air tightness detection device of the rubber bellows of the present invention, wherein: a through groove for the linkage rod to pass through is provided on the surface of the positioning plate, and a plurality of fan-shaped grooves are provided in an annular shape on the outer periphery of the through groove of the positioning plate;

[0016] There are two groups of clamping mechanisms, which are respectively clamped at the two end portions of the rubber bellows. The clamping mechanisms are composed of a plurality of deformable clamping units, each of which has a trapezoidal groove on its surface, and the clamping units are retracted and extended along the center line of the rubber bellows.

[0017] As a preferred solution of the air tightness detection device for a rubber bellows described in the present invention, there are multiple groups of internal clamping structures, the multiple groups of internal clamping structures are distributed in a circle with equal intervals, and the multiple groups of internal clamping structures are plug-in connected to the clamping mechanism.

[0018] As a preferred solution of the air tightness detection device for a rubber bellows described in the present invention, the outer clamping structure includes multiple groups of outer clamping groups and connecting rings for connecting the multiple groups of outer clamping groups, and the ring body of the connecting ring is arranged as a telescopic ring.

[0019] As a preferred solution of the air tightness detection device of the rubber bellows described in the present invention, wherein: the outer clamping group includes a plurality of equally spaced outer clamping plates, elastic rods are provided between the plurality of outer clamping plates, the plurality of outer clamping plates are integrally connected by the elastic rods, and a hexagonal positioning rod is inserted inside each outer clamping plate.

[0020] As a preferred solution of the air tightness detection device of the rubber bellows described in the present invention, wherein: a linkage structure is arranged at one end of the inner frame away from the driving structure, the linkage structure comprises a group of rollers rotatably mounted on the positioning plate and a spoiler assembly mounted on the surface of the linkage rod when rotating, a synchronous belt is arranged between the rollers and the spoiler assembly, and the rollers are synchronously driven with the spoiler assembly through the synchronous belt;

[0021] The spoiler assembly includes a rotating rod inserted in the linkage rod, and a plurality of spoilers are fixed on the surface of the rod body extending from the linkage rod of the rotating rod.

[0022] As a preferred solution of the air tightness detection device of a rubber bellows described in the present invention, the outer frame includes two groups of rectangular frames attached to the inner frame, a transparent elastic film for sealing is provided between the two groups of rectangular frames, and a plurality of claws extend on the rectangular frames.

[0023] Beneficial effects of the present invention: the present invention assembles an inner frame and an outer frame at the openings at both ends of the rubber bellows, so that the outer wall of the rubber bellows is clamped by the inner frame and the outer frame to form a sealed area, abandoning the traditional method of immersing the rubber bellows in water, and using the pressure difference inside the rubber bellows to force water out of the outer wall of the rubber bellows through the leakage point, so as to detect the air tightness of the rubber bellows, change the detection area through the flow of water, reduce the visual blind spot, reduce the amount of water used, and improve the air tightness detection efficiency, and at the same time, link the spoiler component to make the airflow in the rubber bellows flow quickly, quickly dry the detected area, and avoid interference from the flowing water. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a cross-sectional view of an air tightness detection device for a rubber bellows;

[0026] Figure 2 The figure is a schematic diagram of the overall structure of an air tightness detection device for a rubber bellows;

[0027] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0028] Figure 4 It is a schematic diagram of the overall structure of the inner frame in the present invention;

[0029] Figure 5 It is an axonometric diagram of the overall structure of the inner frame in the present invention;

[0030] Figure 6 It is an assembly diagram of the clamping structure and the rubber bellows of the present invention;

[0031] Figure 7 It is a schematic diagram of the overall structure of the outer clamping structure in the present invention;

[0032] Figure 8 For the present invention Figure 7 Enlarged view of the structure at point B in the middle.

[0033] Reference numerals:

[0034] 100, rubber bellows; 200, inner frame; 210, outer fixing plate; 211, guide hole; 220, inner rotating plate; 221, ring gear; 222, hexagonal sleeve; 230, positioning plate; 231, through groove; 232, fan-shaped groove; 240, card slot; 250, positioning groove; 300, water tray; 310, induction belt; 400, outer frame; 410, rectangular frame; 420, transparent elastic film; 430, buckle claw; 500, outer clamping structure; 510, outer clamping group; 511, outer clamping plate; 512, elastic rod; 513, hexagonal positioning rod; 520, connecting ring; 600, inner clamping structure; 700, clamping mechanism; 710, clamping unit; 711, trapezoidal groove; 800, linkage rod; 900, driving structure; 910, motor; 920, circular gear; 930, linkage structure; 940, roller; 950, spoiler assembly; 951, rotating rod; 952, spoiler; 960, synchronous belt. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1

[0039] Reference Figure 1 , Figure 2 as well as Figure 6As shown in the figure, it is the first embodiment of the present invention, which provides an air tightness detection device for a rubber bellows, including: a main frame, a clamping mechanism and a pressure generating device, wherein the main frame includes an inner frame 200 for supporting the rubber bellows 100, a water receiving tray 300 slidably installed at the bottom end of the inner frame 200, and an outer frame 400 covered on the outside of the inner frame 200, and a sensing belt 310 for sensing water drops is installed along the length direction of the water receiving tray 300, and a raindrop sensor, a microcontroller and an infrared optical rainfall sensor are laid on the sensing belt 310. The raindrop sensor detects the presence of raindrops through its unique piezoelectric effect. When raindrops fall on the sensor, the sensor will output a corresponding electrical signal. The infrared optical rainfall sensor determines the position of raindrops by analyzing the scattering and reflection mode of raindrops to infrared light. The microcontroller determines the position of raindrops according to the raindrop sensor and the infrared optical rainfall sensor. The signal output by the external optical rain sensor is processed and analyzed in real time, and a corresponding control signal is issued according to the processing result; the outer frame 400 and the inner frame 200 form a sealing area, and the sealing area seals the outer peripheral surface of the rubber bellows 100, and the outer frame 400 includes two sets of rectangular frames 410 attached to the inner frame 200, and a transparent elastic film 420 for sealing is provided between the two sets of rectangular frames 410, and a plurality of claws 430 extend from the rectangular frames 410, and the length of the outer frame 400 can be changed by the elasticity of the transparent elastic film 420 to adapt to the measurement of rubber bellows 100 of different lengths, and the claws 430 are used to buckle and connect to the inner frame 200 to determine the actual length and actual position of the outer frame 400, and a guide hole 211 is provided on the surface of the inner frame 200 to extract the air in the sealing area through the guide hole 211;

[0040] There are two groups of inner frames 200, which are respectively arranged at both ends of the rubber bellows 100. The inner frames 200 include an outer fixing plate 210, an inner rotating plate 220 and a positioning plate 230, wherein a slot 240 for the inner rotating plate 220 to engage is provided on the surface wall of the outer fixing plate 210 and the positioning plate 230, and a positioning slot 250 for the water receiving tray 300 to penetrate is provided at the bottom end of the outer fixing plate 210, wherein the positioning plate 230 and the outer fixing plate 210 are fixedly connected;

[0041] The pressure generating device is used to extract the gas in the sealing area to form a negative pressure in the sealing area. The pressure generating device consists of an air pump, a high-pressure hose and a sealing joint. The high-pressure hose is inserted into the guide hole 211. The air flow in the sealing area is extracted by the air pump to form a negative pressure in the sealing area.

[0042] Among them, the two ends of the rubber bellows 100 are equipped with clamping mechanisms 700, and a linkage rod 800 is provided between the clamping mechanism 700 and the inner frame 200. The linkage rod 800 forms a transmission setting between the clamping mechanism 700 and the inner frame 200. It should be noted that if it is necessary to form a transmission setting between the clamping mechanism 700 and the inner frame 200 through the above-mentioned linkage rod 800, a thin layer of silicone can be laid on the outer surface of the rod body of the linkage rod 800, or the linkage rod 800 can be set in the shape of a hexagonal rod or a triangular rod, and the shape of the linkage rod 800 on the clamping mechanism 700 and the inner frame 200 will change accordingly; the number of the clamping mechanisms 700 is two groups, and the two groups of clamping mechanisms 700 are respectively clamped at the two end portions of the rubber bellows 100, and the clamping mechanism 700 consists of multiple The rubber bellows 100 is composed of a deformable clamping unit 710, each of which is provided with a trapezoidal groove 711 on its surface, and the clamping unit 710 is extended and retracted along the center line of the rubber bellows 100. The clamping unit 710 is composed of a U-shaped sheet and a trapezoidal sheet that are buckled on the end of the rubber bellows 100. The trapezoidal sheet is a telescopic plate body, and the linkage rod 800 is fastened by the telescopic fastening of the trapezoidal sheet. The U-shaped sheet and the trapezoidal sheet have toughness, and can be bent to clamp rubber bellows 100 of different calibers. The rubber bellows 100 of different calibers can be clamped by a plurality of clamping units 710 of different numbers. The purpose of the clamping mechanism 700 is to reduce the caliber of the rubber bellows 100 to ensure that the water in the rotating rubber bellows 100 cannot overflow from the openings at both ends.

[0043] Specifically, a suitable number of clamping units 710 are selected and installed at the openings at both ends of the rubber bellows 100, and two adjacent groups of clamping units 710 are tightly fitted to ensure that there is no leakage at the assembly of multiple groups of clamping units 710, and then two groups of inner frames 200 and outer frames 400 are covered on the rubber bellows 100, and at the same time, the clamping mechanism 700 and the inner frame 200 are connected through two groups of linkage rods 800, and finally the water receiving tray 300 is inserted along the positioning groove 250;

[0044] A certain amount of water is poured into the rubber bellows 100, and the water is required to be laid on the bottom end of the inner wall of the rubber bellows 100. At the same time, a high-pressure hose is inserted into the guide hole 211, and the air flow in the sealing area is extracted by the vacuum pump to form a negative pressure in the sealing area. There is a certain pressure difference between the inside and outside of the rubber bellows 100. The high pressure squeezes the water from the leakage of the rubber bellows 100 and drops it onto the sensing belt 310 of the water receiving tray 300, thereby detecting the air tightness of the rubber bellows 100;

[0045] Designed like this:

[0046] First, there is no need to set up a large water tank to ensure the immersion of the rubber bellows 100, and the required amount of water is less, saving water resources;

[0047] Secondly, the amount of water in the rubber bellows 100 is small, and the range of water distribution at the same time is small, so the range required for a single detection is small, which improves the accuracy of air tightness detection. At the same time, a sensing belt 310 is added, so that the air tightness and leakage position of the rubber bellows 100 can be judged without naked eye observation.

[0048] Example 2

[0049] Reference Figure 2 , Figure 6 , Figure 7 as well as Figure 8 As shown, it is the second embodiment of the present invention, which is based on the previous embodiment, except that the clamping mechanism includes an inner clamping structure 600 and an outer clamping structure 500 provided on the inner and outer surfaces of the rubber bellows 100, the outer clamping structure 500 is contraction-type and tightly attached to the outer surface of the rubber bellows 100, and the inner clamping structure 600 supports the outer clamping structure 500 through the rubber bellows 100. Since the rubber bellows 100 has a certain elasticity, it will naturally sag in a horizontal state and deform under pressure. The outer clamping structure 500 and the inner clamping structure 600 are used to ensure that the rubber bellows 100 is in a horizontal state, and at the same time, the rubber bellows 100 is prevented from excessive deformation under the clamping of the outer clamping structure 500 and the inner clamping structure 600;

[0050] The number of the internal clamping structures 600 is multiple groups, and the multiple groups of internal clamping structures 600 are distributed in a circle with equal spacing. The multiple groups of internal clamping structures 600 and the clamping mechanism 700 are plug-in connected. The detachable connection between the internal clamping structures 600 and the clamping mechanism 700 facilitates the installation of the internal clamping structures 600.

[0051] The outer clamping structure 500 includes multiple sets of outer clamping groups 510 and a connecting ring 520 for connecting the multiple sets of outer clamping groups 510. The ring body of the connecting ring 520 is configured as a telescopic ring. The connecting ring 520 with a telescopic design can match rubber bellows 100 of different diameters.

[0052] The outer clamping group 510 includes a plurality of equally spaced outer clamping plates 511, and elastic rods 512 are provided between the plurality of outer clamping plates 511. The plurality of outer clamping plates 511 are connected in an integral manner through the elastic rods 512. The contact area between the outer clamping structure 500 and the rubber bellows 100 is increased through the outer clamping plates 511, and the outer clamping plates 511 are wavy in shape to match the rubber bellows 100, so as to increase the clamping efficiency of the rubber bellows 100.

[0053] Example 3

[0054] Reference Figure 2~Figure 5As shown, it is the third embodiment of the present invention. This embodiment is based on the previous embodiment, and the difference is that a driving structure 900 is provided on the inner frame 200, and the driving structure 900 includes a motor 910 fixed to the outer fixing plate 210. A circular gear 920 is fixed to one end of the output shaft of the motor 910 passing through the outer fixing plate 210, and a group of ring gears 221 are fixed on one side of the inner rotating plate 220, and multiple groups of hexagonal sleeves 222 are fixed on the other side. The circular gear 920 and the ring gear 221 form a meshing transmission setting. The motor 910 is equipped with a controller, a reducer and other equipment, wherein the controller is used to control the angle of a single rotation of the motor 910 and the time of intermittent rotation. At the same time, a control panel is provided externally, and the controller parameters are changed through debugging by professionals. At the same time, the controller is integrated with the microcontroller. When the induction belt 310 senses the dripping of water drops, the controller controls the motor 910 to stop rotating immediately, and the rubber bellows 100 stops rotating. The reducer is used to reduce the rotation speed of the motor 910 to prevent the water flow in the rubber bellows 100 from leaking from the two ports.

[0055] A plurality of groups of hexagonal sleeves 222 are distributed in an annular manner at equal intervals on the surface of the inner rotating plate 220. Each group of hexagonal sleeves 222 has a plurality of hexagonal sleeves 222, and the intervals between the plurality of hexagonal sleeves 222 are equal. The hexagonal sleeves 222 are plug-in connected to the hexagonal positioning rod 513. When the motor 910 drives the inner rotating plate 220 to rotate, the outer clamping structure 500 rotates synchronously, thereby realizing intermittent rotation of the rubber bellows 100.

[0056] The surface of the positioning plate 230 is provided with a through groove 231 for the linkage rod 800 to pass through. The positioning plate 230 is provided with a plurality of fan-shaped grooves 232 in an annular shape on the outer periphery of the through groove 231. The fan-shaped grooves 232 and the trapezoidal grooves 711 are passed through to prevent water from invading the inside of the rubber bellows 100.

[0057] A linkage structure 930 is disposed at one end of the inner frame 200 away from the driving structure 900. The linkage structure 930 includes a set of rollers 940 rotatably mounted on the positioning plate 230 and a spoiler assembly 950 mounted on the surface of the linkage rod 800 when rotating. A synchronous belt 960 is disposed between the rollers 940 and the spoiler assembly 950, and the rollers 940 are synchronously driven with the spoiler assembly 950 through the synchronous belt 960.

[0058] The spoiler assembly 950 includes a rotating rod 951 inserted into the linkage rod 800 , and a plurality of spoiler sheets 952 are fixed on the rod surface of the rotating rod 951 extending outside the linkage rod 800 .

[0059] When the inner frame 200 rotates, the outer clamping structure 500 and the inner clamping structure 600 rotate synchronously, so that the rubber bellows 100 rotates, and the clamping mechanism 700 located at the openings at both ends of the rubber bellows 100 rotates accordingly, thereby causing the linkage rod 800 inserted between the clamping mechanism 700 and the inner frame 200 to rotate accordingly. However, since the motor 910 is in slow intermittent motion, the spoiler component 950 located on the surface of the linkage rod 800 is in slow motion, which cannot disturb the airflow inside the rubber bellows 100, causing the fast-flowing The inner frame 200 rotates and squeezes the roller 940, thereby causing the roller 940 to rotate, so as to realize rapid rotation of the roller 940. The roller 940 forms a transmission arrangement with the spoiler assembly 950 through the synchronous belt 960, so that the spoiler assembly 950 rotates at a high speed. The high-speed rotating spoiler assembly 950 disrupts the air flow inside the rubber bellows 100, so that the parts of the rubber bellows 100 wetted by the water flow are dried by the fast-flowing air flow, so as to prevent the water droplets adhering to the detected part of the rubber bellows 100 from affecting the air tightness detection of the next area.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An air tightness detection device for a rubber bellows, characterized in that: include: A main frame, comprising an inner frame (200) for supporting a rubber bellows (100), a water receiving tray (300) slidably mounted on the bottom end of the inner frame (200), and an outer frame (400) covered on the outside of the inner frame (200); a sensing belt (310) for sensing water drops is mounted along the length direction of the water receiving tray (300); the outer frame (400) and the inner frame (200) form a sealing area, which seals the outer peripheral surface of the rubber bellows (100); A clamping mechanism, comprising an inner clamping structure (600) and an outer clamping structure (500) provided on the inner and outer surfaces of the rubber bellows (100), wherein the outer clamping structure (500) is contractionally attached to the outer surface of the rubber bellows (100), and the inner clamping structure (600) supports the outer clamping structure (500) via the rubber bellows (100); The number of the inner frames (200) is two groups, and the two groups of the inner frames (200) are respectively arranged at the two ends of the rubber bellows (100), and the inner frames (200) include an outer fixing plate (210), an inner rotating plate (220) and a positioning plate (230); a driving structure (900) is provided on the inner frame (200), and the driving structure (900) includes a motor (910) fixed to the outer fixing plate (210), and an output shaft of the motor (910) passes through one end of the outer fixing plate (210) and is fixed with a circular gear (920), and a group of ring gears (221) are fixed on one side of the inner rotating plate (220), and the other end of the ring gears (221) are fixed on the other side of the inner rotating plate (220). A plurality of groups of hexagonal sleeves (222) are fixed on the side, and the circular gear (920) and the ring gear (221) form a meshing transmission arrangement; a linkage structure (930) is arranged at one end of the inner frame (200) away from the driving structure (900), and the linkage structure (930) comprises a group of rollers (940) rotatably mounted on the positioning plate (230) and a spoiler assembly (950) mounted on the surface of the linkage rod (800) when rotating, a synchronous belt (960) is arranged between the rollers (940) and the spoiler assembly (950), and the rollers (940) are synchronously transmitted with the spoiler assembly (950) through the synchronous belt (960); The spoiler assembly (950) comprises a rotating rod (951) inserted into the linkage rod (800), and a plurality of spoiler sheets (952) are fixed on the surface of the rod body of the rotating rod (951) extending outside the linkage rod (800); A pressure generating device, which is used to extract gas from the sealing area to form a negative pressure in the sealing area; Wherein, clamping mechanisms (700) are installed at both ends of the rubber bellows (100), and a linkage rod (800) is provided between the clamping mechanism (700) and the inner frame (200), so that a transmission arrangement is formed between the clamping mechanism (700) and the inner frame (200) through the linkage rod (800).

2. The air tightness detection device for a rubber bellows according to claim 1, characterized in that: A clamping groove (240) for clamping the inner rotating plate (220) is provided on the surface walls of the outer fixing plate (210) and the positioning plate (230), and a positioning groove (250) for the water receiving tray (300) to pass through is provided at the bottom end of the outer fixing plate (210), wherein the positioning plate (230) and the outer fixing plate (210) are fixedly connected.

3. The air tightness detection device for a rubber bellows according to claim 2, characterized in that: A plurality of groups of hexagonal sleeves (222) are distributed in an annular manner at equal intervals on the surface of the inner rotating plate (220), each group of the hexagonal sleeves (222) has a plurality of hexagonal sleeves (222), and the intervals between the plurality of hexagonal sleeves (222) are equal.

4. The air tightness detection device for a rubber bellows according to claim 3, characterized in that: A through slot (231) for the linkage rod (800) to pass through is formed on the surface of the positioning plate (230), and a plurality of fan-shaped slots (232) are formed in an annular shape on the outer periphery of the through slot (231) of the positioning plate (230); The clamping mechanisms (700) are provided in two groups, and the two groups of clamping mechanisms (700) are respectively clamped at the two end portions of the rubber bellows (100). The clamping mechanisms (700) are composed of a plurality of deformable clamping units (710), and a trapezoidal groove (711) is provided on the surface of each clamping unit (710), and the clamping units (710) are retractable along the center line of the rubber bellows (100).

5. The air tightness detection device for a rubber bellows according to claim 4, characterized in that: The number of the internal clamping structures (600) is a plurality of groups, the plurality of groups of the internal clamping structures (600) are distributed circumferentially at equal intervals, and the plurality of groups of the internal clamping structures (600) are plug-in connected to the clamping mechanism (700).

6. The air tightness detection device for a rubber bellows according to claim 5, characterized in that: The external clamping structure (500) comprises a plurality of external clamping groups (510) and a connecting ring (520) for connecting the plurality of external clamping groups (510), wherein the ring body of the connecting ring (520) is arranged in the form of a telescopic ring.

7. The air tightness detection device for a rubber bellows according to claim 6, characterized in that: The outer clamping group (510) comprises a plurality of outer clamping plates (511) at equal intervals, elastic rods (512) are provided between the plurality of outer clamping plates (511), the plurality of outer clamping plates (511) are connected in an integral manner via the elastic rods (512), and a hexagonal positioning rod (513) is inserted inside each outer clamping plate (511).

8. The air tightness detection device for a rubber bellows according to claim 7, characterized in that: The outer frame (400) comprises two sets of rectangular frames (410) attached to the inner frame (200), a transparent elastic film (420) for sealing is provided between the two sets of rectangular frames (410), and a plurality of buckle claws (430) extend from the rectangular frames (410).

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