Airtightness testing device

Abstract

The utility model provides an air tightness testing device, which comprises a rack, a conveying line, a clamping module, a tray, a first plugging module, a first inflation module, a second inflation module, a second plugging module, a third plugging module, a fourth plugging module and a jacking mechanism, the conveying line stretches across the rack and is arranged on the ground, the clamping module is arranged on the rack, the tray is arranged on the rack, and the tray is arranged on the rack. The rollers are distributed on two sides of the conveying line; the beneficial effects of the utility model are that a product on the tray flows into a test position along with the conveying line and does not need to be carried; the plugging module is driven by an air cylinder to push a plugging head to be tightly pressed on a product to form sealing, the inflation module is driven by the air cylinder to push a sealing head to be tightly pressed on the product to form sealing, then inflation and pressure maintaining are conducted for a period of time, and then the air leakage amount is checked to judge whether the sealing performance is qualified or not. The whole detection process is integrated on one device; the device does not adopt a water tank, so that the surface of a product is dry, and a drying step is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of airtight testing, in particular to an airtight testing device. Background Art

[0002] With the popularization of electric vehicles, electric vehicle production lines require more efficient and faster production methods. Patent 1: A high-pressure airtightness test device for a gearbox (publication number CN219224048U), including a water tank, the top of the water tank is fixedly connected to a mounting frame, the inner top wall of the mounting frame is fixed with two telescopic cylinders, the telescopic ends of the two telescopic cylinders are commonly fixed with a connecting plate, a turntable is arranged below the connecting plate, a driving motor is fixed on the upper surface of the connecting plate, the driving end of the driving motor is fixed to the center of the turntable, two side support frames are fixed on the lower surface of the turntable, the side walls of the two side support frames are fixed with connecting blocks, one end of the connecting block is fixed with a clamping vertical plate, and the surface of the clamping vertical plate is provided with four groups of clamping components, an air pump and an air blowing pump are arranged on the back of the water tank, the air outlet end of the air pump is connected with an air pipe, one end of the air pipe is provided with a connector, and the two symmetrical side walls of the mounting frame are both installed with air blowing mechanisms, and the water tank is made of transparent tempered glass.

[0003] The disadvantage of the prior art is that the devices are dispersed, and after the air tightness test is completed, a lot of moisture will remain on the surface of the gearbox. If the moisture is not removed quickly, it may cause damage to the gearbox over a long period of time. Utility Model Content

[0004] In order to overcome the above problems existing in the prior art, the utility model provides an airtight testing device.

[0005] The utility model discloses an airtight testing device, comprising a frame, a conveying line, a clamping module, a tray, a blocking module 1, an inflation module 1 and an inflation module 2, a blocking module 2, a blocking module 3, a blocking module 4 and a lifting mechanism, wherein the conveying line is arranged on the ground across the frame, the clamping module is mounted on the frame and distributed on both sides of the conveying line, the tray is placed on the conveying line, and the lifting mechanism is mounted on the frame, the blocking module 1, the inflation module 1, the inflation module 2 and the blocking module 4 are mounted on the frame, and the blocking module 2 and the blocking module 3 are mounted on the lifting mechanism.

[0006] On this basis, the frame includes a main frame and a gas storage tank, the main frame is in a "T" shape, and the gas storage tank is installed at the bottom of the main frame.

[0007] On this basis, the clamping module includes a bracket and a clamping cylinder, the bracket is installed on the main frame, and the clamping cylinder is installed on the bracket.

[0008] On this basis, the blocking module 1 includes a mounting bracket, a guide rod cylinder, a connecting plate, a first fixed seat, a first movable rod, a first block, a first spring, a first blocking head and a first limit block. The mounting bracket is installed on the main frame, the guide rod cylinder is installed on the mounting bracket, the connecting plate is installed on the guide rod cylinder, the first fixed seat is installed on the connecting plate, the first spring is inserted into the first movable rod and inserted into the first fixed seat, the first block is installed at the end of the first movable rod, the first blocking head is installed at the front end of the first movable rod, and the first limit block is installed on the side of the first fixed seat.

[0009] On this basis, the inflation module 1 includes a first mounting frame, a first cylinder, a sleeve, a first linear bearing, a first guide rod, a first connecting head, a second fixed seat, a second movable rod, a second stopper, a second spring, a sealing head, a ring, a second limit block and an air pipe joint. The first mounting frame is installed on the main frame, the first cylinder is installed on one side of the first mounting frame, and the sleeve is installed on the other side of the first mounting frame. The first linear bearing is sleeved in the sleeve, the first guide rod is sleeved in the first linear bearing and connected to the movable end of the first cylinder, the first connecting head is installed on the first guide rod, the second fixed seat is installed on the first connecting head, the second movable rod is installed on the second fixed seat, the second spring is sleeved in the second movable rod and inserted into the second fixed seat, the second stopper is installed at the end of the second movable rod, the sealing head and the ring are installed at the front end of the second movable rod, the second limit block is installed on the side of the second fixed seat, and the air pipe joint is installed on the side of the second movable rod opposite to the second limit block.

[0010] On this basis, the structure of the inflation module 2 is the same as that of the inflation module 1.

[0011] On this basis, the blocking module 2 includes a second mounting frame, a second cylinder, a second linear bearing, a second guide rod, a connecting block, a second connecting head, a third fixed seat, a third movable rod, a fourth spring, a third stopper, a second blocking head and an O-ring. The second mounting frame and the second cylinder are installed on the lifting mechanism, the second linear bearing is inserted into the second mounting frame, the second guide rod is inserted into the second linear bearing, the second connecting head is installed on the second guide rod and connected to the movable end of the second cylinder through the connecting block, the third fixed seat is installed on the second connecting head, the fourth spring is inserted into the third movable rod and inserted into the third fixed seat, the third stopper is installed at the end of the third movable rod, the second blocking head is installed at the front end of the third movable rod, and the O-ring is installed on the top of the second blocking head.

[0012] On this basis, the blocking module three has the same structure as the blocking module two.

[0013] On this basis, the blocking module four includes a mounting plate, a guide rod cylinder one, a mounting plate two, a guide rod cylinder two, a fourth fixed seat, a fourth movable rod, a third spring, a fourth block, a third blocking head, a retaining ring and a third limit block. The guide rod cylinder one is mounted on the mounting plate, the mounting plate two is mounted on the guide rod cylinder one, the guide rod cylinder two is mounted on the mounting plate two, the fourth fixed seat is mounted on the guide rod cylinder two, the third spring is inserted into the fourth movable rod and inserted into the fourth fixed seat, the fourth block is mounted on the fourth movable rod, the third blocking head and the retaining ring are mounted on the front end of the fourth movable rod, and the third limit block is mounted on the side of the fourth fixed seat.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the product is located on a pallet and flows into the test position along the conveyor line without the need for transportation; the principle of the plugging module is that it is driven by a cylinder to push the plugging head to press tightly on the product to form a seal, and the principle of the inflation module is that it is driven by a cylinder to push the sealing head to press tightly on the product to form a seal, which is then inflated, and the leakage is checked after maintaining the pressure for a period of time to determine whether the sealing is qualified; the plugging module one, the inflation module one, the inflation module two and the plugging module four are installed on the frame, and the plugging module two and the plugging module three are installed on the jacking mechanism, with a compact structure and reasonable layout, and the entire detection process is integrated into one device; the device does not use a water tank, which ensures that the product surface is dry and eliminates the drying step. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the airtight testing device of the utility model;

[0016] Figure 2 It is a schematic diagram of the frame structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the conveyor line of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the clamping module of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the tray of the utility model;

[0020] Figure 6 This is a structural schematic diagram of a blocking module of the utility model;

[0021] Figure 7 This is a structural schematic diagram of an inflatable module of the utility model;

[0022] Figure 8 This is a structural schematic diagram of the second inflation module of the utility model;

[0023] Fig. 9 This is a structural schematic diagram of the second plugging module of the utility model;

[0024] Fig.10 It is a schematic diagram of the third structure of the plugging module of the utility model;

[0025] Fig.11 This is a schematic diagram of the fourth structure of the plugging module of the utility model;

[0026] Fig.12 It is a schematic diagram of the jacking structure of the utility model;

[0027] In the figure:

[0028] 1. Frame, 1-1. Main frame, 1-2. Gas storage tank;

[0029] 2. Conveyor line;

[0030] 3. Clamping module, 3-1. Bracket, 3-2. Clamping cylinder;

[0031] 4. Pallet;

[0032] 5. Blocking module 1, 5-1. Mounting bracket, 5-2. Guide rod cylinder, 5-3. Connecting plate, 5-4. First fixing seat, 5-5. First movable rod, 5-6. First stopper, 5-7. First spring, 5-8. First blocking head, 5-9. First limit block;

[0033] 6. Inflatable module 1, 6-1. First mounting frame, 6-2. First cylinder, 6-3. Sleeve, 6-4. First linear bearing, 6-5. First guide rod, 6-6. First connector, 6-7. Second fixing seat, 6-8. 6-9. Second movable rod, second stopper, 6-10. Second spring, 6-11. Sealing head, 6-12. Ferrule, 6-13. Second limit block, 6-14. Trachea joint;

[0034] 7. Inflatable module 2;

[0035] 8. Blocking module 2, 8-1. Second mounting frame, 8-2. Second cylinder, 8-3. Second linear bearing, 8-4. Second guide rod, 8-5. Connecting block, 8-6. Second connecting head, 8-7. Third fixing seat, 8-8. Third movable rod, 8-9. Fourth spring, 8-10. Third stopper, 8-11. Second blocking head, 8-12. O-ring;

[0036] 9. Blocking module three;

[0037] 10. Blocking module four, 10-1. Mounting plate, 10-2. Guide rod cylinder one, 10-3. Mounting plate two, 10-4. Guide rod cylinder two, 10-5. Fourth fixing seat, 10-6. Fourth movable rod, 10-7. Third spring, 10-8. Fourth stopper, 10-9. Third blocking head, 10-10. Retaining ring, 10-11. Third limiting block;

[0038] 11. Lifting mechanism. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] The utility model discloses an airtight testing device, referring to Figure 1 , Figure 4 , Figure 5 and Fig.11 , including a frame 1, a conveyor line 2, a clamping module 3, a pallet 4, a blocking module 5, an inflation module 1 6 and an inflation module 2 7, a blocking module 2 8, a blocking module 3 9, a blocking module 4 10 and a lifting mechanism 11. The conveyor line 2 is arranged on the ground across the frame 1. The clamping module 3 is installed on the frame 1 and is distributed on both sides of the conveyor line 2 for clamping products. The pallet 4 is placed on the conveyor line 2 to carry products. The blocking module 5, the inflation module 1 6, the inflation module 2 7 and the blocking module 4 10 are installed on the frame 1. The blocking module 2 8 and the blocking module 3 9 are installed on the lifting mechanism 11. The principle of the blocking module is that it is driven by a cylinder to push the blocking head to press tightly on the product to form a seal. The principle of the inflation module is that it is driven by a cylinder to push the sealing head to press tightly on the product to form a seal, and then it is inflated. After maintaining the pressure for a period of time, the leakage is checked to determine whether the sealing is qualified.

[0041] refer to Figure 2 The frame 1 includes a main frame 1-1 and a gas storage tank 1-2. The main frame 1-1 is in an inverted "T" shape. The gas storage tank 1-2 is installed at the bottom of the main frame 1-1, and the gas storage tank 1-2 is used to provide a gas source.

[0042] refer to Figure 4 The clamping module 3 includes a bracket 3-1 and a clamping cylinder 3-2. The bracket 3-1 is installed on the main frame 1-1, and the clamping cylinder 3-2 is installed on the bracket 3-1. The clamping cylinder 3-2 is used to clamp the product.

[0043] refer to Figure 6The blocking module 5 includes a mounting bracket 5-1, a guide rod cylinder 5-2, a connecting plate 5-3, a first fixed seat 5-4, a first movable rod 5-5, a first stopper 5-6, a first spring 5-7, a first blocking head 5-8 and a first limit block 5-9. The mounting bracket 5-1 is mounted on the main frame 1-1, the guide rod cylinder 5-2 is mounted on the mounting bracket 5-1, the connecting plate 5-3 is mounted on the guide rod cylinder 5-2, the first fixed seat 5-4 is mounted on the connecting plate 5-3, the first spring 5-7 is inserted into the first movable rod 5-5 and inserted into the first fixed seat 5-4, the first stopper 5-6 is mounted at the end of the first movable rod 5-5, the first blocking head 5-8 is mounted at the front end of the first movable rod 5-5, and the first limit block 5-9 is mounted on the side of the first fixed seat 5-4.

[0044] During actual operation, the guide rod cylinder 5-2 moves to drive the connecting plate 5-3, the first fixed seat 5-4 and other movable parts until the first plug 5-8 contacts the product. As the guide rod cylinder 5-2 continues to move, the first spring 5-7 is compressed and begins to squeeze the first movable rod 5-5. The first stopper 5-6 gradually approaches and contacts the connecting plate 5-3. The guide rod cylinder 5-2 continues to move. When the first limit block 5-9 contacts the product tightly, the first plugging head 5-8 is pressed tightly against the product to form a seal.

[0045] refer to Figure 7 The inflation module 6 includes a first mounting frame 6-1, a first cylinder 6-2, a sleeve 6-3, a first linear bearing 6-4, a first guide rod 6-5, a first connecting head 6-6, a second fixing seat 6-7, a second movable rod 6-8, a second stopper 6-9, a second spring 6-10, a sealing head 6-11, a ferrule 6-12, a second limit block 6-13 and a trachea joint 6-14. The first mounting frame 6-1 is mounted on the main frame 1-1, the first cylinder 6-2 is mounted on one side of the first mounting frame 6-1, the sleeve 6-3 is mounted on the other side of the first mounting frame 6-1, the first linear bearing 6-4 is inserted into the sleeve 6-3, and the first guide rod 6-5 is inserted into the first linear The bearing 6-4 is connected to the movable end of the first cylinder 6-2, the first connecting head 6-6 is installed on the first guide rod 6-5, the second fixed seat 6-7 is installed on the first connecting head 6-6, the second movable rod 6-8 is installed on the second fixed seat 6-7, the second spring 6-10 is inserted into the second movable rod 6-8 and inserted into the second fixed seat 6-7, the second stop block 6-9 is installed at the end of the second movable rod 6-8, the sealing head 6-11 and the ring 6-12 are installed at the front end of the second movable rod 6-8, the second limit block 6-13 is installed on the side of the second fixed seat 6-7, and the air pipe joint 6-14 is installed on the second movable rod 6-8 on the side opposite to the second limit block 6-13.

[0046] refer to Figure 8The structure of the inflation module 2 7 is the same as that of the inflation module 1 6, and the source of the gas source is the gas tank 1-2. In actual operation, the first cylinder 6-2 drives the first guide rod 6-5 to move, the first connecting head 6-6, the second fixed seat 6-7 and other movable parts to move, until the sealing head 6-11 and the ring 6-12 contact the motor airtight inflation port on the product. As the first cylinder 6-2 continues to move, the second spring 6-10 is compressed and begins to squeeze the second movable rod 6-8, and the second stopper 6-9 gradually approaches and contacts the first connecting head 6-6. The first cylinder 6-2 continues to move. When the second limit block 6-13 is in close contact with the product, the sealing head 6-11 is pressed tightly on the product to form a seal, and then inflation is carried out through the air pipe joint 6-14, and inflation is stopped after reaching the specified pressure.

[0047] refer to Fig. 9 The blocking module 2 8 includes a second mounting frame 8-1, a second cylinder 8-2, a second linear bearing 8-3, a second guide rod 8-4, a connecting block 8-5, a second connecting head 8-6, a third fixed seat 8-7, a third movable rod 8-8, a fourth spring 8-9, a third stopper 8-10, a second blocking head 8-11 and an O-ring 8-12. The second mounting frame 8-1 and the second cylinder 8-2 are installed on the lifting mechanism 11, the second linear bearing 8-3 is inserted into the second mounting frame 8-1, and the second guide rod 8-4 is inserted into The second linear bearing 8-3, the second connecting head 8-6 are installed on the second guide rod 8-4 and connected to the movable end of the second cylinder 8-2 through the connecting block 8-5, the third fixed seat 8-7 is installed on the second connecting head 8-6, the fourth spring 8-9 is inserted into the third movable rod 8-8 and inserted into the third fixed seat 8-7, the third stopper 8-10 is installed at the end of the third movable rod 8-8, the second plugging head 8-11 is installed at the front end of the third movable rod 8-8, and the O-ring 8-12 is installed on the top of the second plugging head 8-11.

[0048] refer to Fig.10 The blocking module three 9 has the same structure as the blocking module two 8. The blocking module two 8 and the blocking module three 9 are installed on the jacking mechanism 11. In actual operation, the second cylinder 8-2 drives the second guide rod 8-4, the connecting block 8-5, the second connecting head 8-6, the third fixing seat 8-7 and other movable parts until the second blocking head 8-11 and the O-ring 8-12 contact the motor airtight sealing plug on the product. As the second cylinder continues to move, the fourth spring 8-9 compresses and squeezes the third movable rod 8-8, and the third stopper 8-10 gradually approaches and contacts the second joint 8-6. The second cylinder 8-2 continues to move to press the second blocking head 8-11 tightly against the product to form a seal.

[0049] refer to Fig.11The plugging module 4 10 includes a mounting plate 10-1, a guide rod cylinder 1 10-2, a mounting plate 2 10-3, a guide rod cylinder 2 10-4, a fourth fixed seat 10-5, a fourth movable rod 10-6, a third spring 10-7, a fourth stopper 10-8, a third plugging head 10-9, a retaining ring 10-10 and a third limit block 10-11, the guide rod cylinder 1 10-2 is mounted on the mounting plate 10-1, the mounting plate 2 10-3 is mounted on the guide rod cylinder 1 10-2, and the guide rod cylinder 2 10-4 is mounted on the mounting plate 2 10-3 The fourth fixed seat 10-5 is installed on the guide rod cylinder 10-4, the third spring 10-7 is inserted into the fourth movable rod 10-6 and inserted into the fourth fixed seat 10-5, the fourth stopper 10-8 is installed at the end of the fourth movable rod 10-6, the third sealing head 10-9 and the retaining ring 10-10 are installed at the front end of the fourth movable rod 10-6 to form a seal, the third limit block 10-11 is installed on the side of the fourth fixed seat 10-5, and the fourth stopper 10-8 and the third limit block 10-11 limit the movement of the fourth movable rod 10-6.

[0050] During actual operation, the guide rod cylinder 1 10-2 and the guide rod cylinder 2 10-4 move in sequence, thereby driving the fourth movable rod 10-6 and other movable parts, the third sealing head 10-9 and the retaining ring 10-10 contact the sealing port on the product, the third spring 10-7 is compressed, the fourth stop block 10-8 and the third limit block 10-11 limit the movement of the fourth movable rod 10-6, and the third sealing head 10-9 is close to the product to form a seal.

[0051] The working principle of the utility model is as follows: the product is placed on the tray 4 and transported to the position by the conveyor line 2, and the tray 4 and the product are lifted and fixed by the lifting mechanism 11, and the clamping cylinder 3-2 clamps the product, and the guide rod cylinder 5-2, the first cylinder 6-2, the second cylinder 8-2 and other cylinders move to press the plugging head or the sealing head against the product to form a seal, wherein the guide rod cylinder 10-2 and the guide rod cylinder 2 10-4 move in sequence to press the third plugging head 10-9 against the product to form a seal, and the air source is passed through the air pipe joint 6-14, the second movable rod 6-8, and the middle hole of the sealing head 6-11 to seal the product. Inflate until the specified pressure is reached and then stop inflating. After standing for a specified time, check the amount of air pressure drop to determine whether it is qualified. The guide rod cylinder 5-2, the first cylinder 6-2, the second cylinder 8-2 and other cylinders move, and the plugging head or sealing head returns to the initial position. Among them, the guide rod cylinder 2 10-4 and the guide rod cylinder 1 10-2 move in sequence to make the third plugging head 10-9 separate from the product and return to the initial position, and the clamping cylinder 3-2 releases the product; the product is placed on the pallet 4 and transported away by the conveyor line 2, the lifting mechanism 11 releases the lifting and fixing, and the pallet 4 falls onto the conveyor line 2 and leaves, completing the air tightness test.

[0052] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screwing", "pad installation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0054] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. An airtight testing device, characterized in that: It comprises a frame (1), a conveying line (2), a clamping module (3), a tray (4), a blocking module 1 (5), an inflation module 1 (6), an inflation module 2 (7), a blocking module 2 (8), a blocking module 3 (9), a blocking module 4 (10) and a lifting mechanism (11). The conveyor line (2) is arranged on the ground across the frame (1). The clamping modules (3) are mounted on the frame (1) and are distributed on both sides of the conveying line (2). The tray (4) is placed on the conveyor line (2). The lifting mechanism (11) is installed on the frame (1). The blocking module 1 (5), the inflation module 1 (6), the inflation module 2 (7) and the blocking module 4 (10) are installed on the frame (1), and the blocking module 2 (8) and the blocking module 3 (9) are installed on the lifting mechanism (11).

2. The airtight testing device according to claim 1, characterized in that: The frame (1) comprises a main frame (1-1) and a gas storage tank (1-2); the main frame (1-1) is in a "T" shape; and the gas storage tank (1-2) is installed at the bottom of the main frame (1-1).

3. The airtight testing device according to claim 2, characterized in that: The clamping module (3) comprises a bracket (3-1) and a clamping cylinder (3-2); the bracket (3-1) is mounted on a main frame (1-1), and the clamping cylinder (3-2) is mounted on the bracket (3-1).

4. The airtight testing device according to claim 2, characterized in that: The blocking module 1 (5) comprises a mounting bracket (5-1), a guide rod cylinder (5-2), a connecting plate (5-3), a first fixing seat (5-4), a first movable rod (5-5), a first stopper (5-6), a first spring (5-7), a first blocking head (5-8) and a first limit block (5-9); the mounting bracket (5-1) is mounted on the main frame (1-1); the guide rod cylinder (5-2) is mounted on the mounting bracket (5-1); and the connecting plate (5-3) is mounted on the first fixing seat (5-4). -3) is mounted on the guide rod cylinder (5-2), the first fixing seat (5-4) is mounted on the connecting plate (5-3), the first spring (5-7) is inserted into the first movable rod (5-5) and inserted into the first fixing seat (5-4), the first stopper (5-6) is mounted at the end of the first movable rod (5-5), the first blocking head (5-8) is mounted at the front end of the first movable rod (5-5), and the first limit block (5-9) is mounted on the side of the first fixing seat (5-4).

5. The airtight testing device according to claim 2, characterized in that: The inflation module 1 (6) comprises a first mounting frame (6-1), a first cylinder (6-2), a sleeve (6-3), a first linear bearing (6-4), a first guide rod (6-5), a first connector (6-6), a second fixed seat (6-7), a second movable rod (6-8), a second stopper (6-9), a second spring (6-10), a sealing head (6-11), a ferrule (6-12), a second limit block (6-13) and an air pipe joint (6-14); the first mounting frame (6-1) is mounted on the main frame (1-1); the first cylinder (6-2) is mounted on one side of the first mounting frame (6-1); the sleeve (6-3) is mounted on the other side of the first mounting frame (6-1); the first linear bearing (6-4) is inserted into the sleeve (6-3); the first guide rod (6-5) is inserted into the first linear bearing (6-4); The linear bearing (6-4) is connected to the movable end of the first cylinder (6-2), the first connecting head (6-6) is installed on the first guide rod (6-5), the second fixing seat (6-7) is installed on the first connecting head (6-6), the second movable rod (6-8) is installed on the second fixing seat (6-7), the second spring (6-10) is inserted into the second movable rod (6-8) and inserted into the second fixing seat (6-7), the second stopper (6-9) is installed at the end of the second movable rod (6-8), the front end of the second movable rod (6-8) is installed with a sealing head (6-11) and a ferrule (6-12), the second limit block (6-13) is installed on the side of the second fixing seat (6-7), and the air pipe joint (6-14) is installed on the side of the second movable rod (6-8) opposite to the second limit block (6-13).

6. The airtight testing device according to claim 5, characterized in that: The structure of the inflation module 2 (7) is the same as that of the inflation module 1 (6).

7. The airtight testing device according to claim 1, characterized in that: The second blocking module (8) comprises a second mounting frame (8-1), a second cylinder (8-2), a second linear bearing (8-3), a second guide rod (8-4), a connecting block (8-5), a second connecting head (8-6), a third fixing seat (8-7), a third movable rod (8-8), a fourth spring (8-9), a third stopper (8-10), a second blocking head (8-11) and an O-ring (8-12); the second mounting frame (8-1) and the second cylinder (8-2) are mounted on the lifting mechanism (11); the second linear bearing (8-3) is inserted into the second mounting frame (8-1); and the second guide rod (8-4) is inserted into the second mounting frame (8-1). The second linear bearing (8-3) is inserted into the second linear bearing (8-3), the second connecting head (8-6) is installed on the second guide rod (8-4) and connected to the movable end of the second cylinder (8-2) through the connecting block (8-5), the third fixing seat (8-7) is installed on the second connecting head (8-6), the fourth spring (8-9) is inserted into the third movable rod (8-8) and inserted into the third fixing seat (8-7), the third stopper (8-10) is installed at the end of the third movable rod (8-8), the second blocking head (8-11) is installed at the front end of the third movable rod (8-8), and the O-ring (8-12) is installed on the top of the second blocking head (8-11).

8. The airtight testing device according to claim 7, characterized in that: The blocking module three (9) has the same structure as the blocking module two (8).

9. The airtight testing device according to claim 1, characterized in that: The blocking module four (10) comprises a mounting plate (10-1), a guide rod cylinder one (10-2), a mounting plate two (10-3), a guide rod cylinder two (10-4), a fourth fixing seat (10-5), a fourth movable rod (10-6), a third spring (10-7), a fourth stopper (10-8), a third blocking head (10-9), a retaining ring (10-10) and a third limit block (10-11); the guide rod cylinder one (10-2) is mounted on the mounting plate (10-1), the mounting plate two (10-3) is mounted on the guide rod cylinder one (10-2), and the The guide rod cylinder 2 (10-4) is mounted on the mounting plate 2 (10-3), the fourth fixed seat (10-5) is mounted on the guide rod cylinder 2 (10-4), the third spring (10-7) is inserted into the fourth movable rod (10-6) and inserted into the fourth fixed seat (10-5), the fourth stopper (10-8) is mounted on the fourth movable rod (10-6), the third sealing head (10-9) and the retaining ring (10-10) are mounted on the front end of the fourth movable rod (10-6), and the third limit block (10-11) is mounted on the side of the fourth fixed seat (10-5).

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