Air pressure container sealing detection device and detection method

Abstract

The invention relates to the technical field of airtightness detection, in particular to an air pressure container sealing detection device and a detection method.The air pressure container sealing detection device comprises a base, a lithium battery, an air pump, a machine shell and a switch, the lithium battery and the air pump are installed on the front side and the rear side of the upper surface of the base respectively, and the machine shell is fixedly connected to the upper surface of the base and protects the lithium battery and the air pump; the switch is installed on the upper surface of the machine shell, the switch is electrically connected with the lithium battery and the air pump, the lithium battery is controlled to supply power to the air pump through the switch, the air pressure container sealing detection device further comprises a filter, a bracket, a connecting mechanism and a leakage searching mechanism, and the filter is installed at the left end of the upper surface of the base; the top of the filter is connected with an air inlet of the air pump through an air pipe, and air entering the air pump is filtered through the filter. The device can be installed on containers with different calibers, is suitable for airtightness detection of containers with different calibers, is wide in application, can enable workers to accurately find leakage points, and facilitates the maintenance of the containers.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, in particular to a pressure container sealing detection device and a detection method. Background Art

[0002] A container refers to a basic device that is used to hold materials and is mainly composed of a shell. It is often used as the shell of storage equipment or other chemical equipment. Gas containers all need to be tested for air tightness to prevent gas leakage and potential safety hazards; the air tightness detection device is mainly composed of an air pump, a conduit, a valve and a pressure gauge. The air pump is used to fill the container with gas to make the air pressure reach the air tightness detection pressure, and the pressure change on the pressure gauge is observed to determine whether there is a leak. The interface size of the container varies depending on the application scenario, capacity and other factors, and the detection device can usually only be installed with containers of the same interface type to achieve the detection purpose. The detection is relatively simple and has poor practicality. Moreover, leakage often occurs at the welding points and connection positions of the container. Even if a leak occurs, the leak point cannot be accurately found, which is not conducive to maintenance by staff. It is necessary to provide a flexible air pressure container sealing detection device. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the existing containers with different calibers cannot be detected and the leakage points cannot be accurately found, and to propose a pressure container sealing detection device and a detection method.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a pressure container sealing detection device, including a base, a lithium battery, an air pump, a casing and a switch, the lithium battery and the air pump are respectively installed on the front and rear sides of the upper surface of the base, the casing is fixedly connected to the upper surface of the base, the casing protects the lithium battery and the air pump, the switch is installed on the upper surface of the casing, and the switch is electrically connected to the lithium battery and the air pump respectively, and the lithium battery is controlled by the switch to power the air pump. The pressure container sealing detection device also includes a filter, a bracket, a connecting mechanism and a leakage detection mechanism, the filter is installed on the left end of the upper surface of the base, and the top of the filter is connected to the air inlet of the air pump through an air pipe, and the gas entering the air pump is filtered by the filter; the bracket is fixedly connected to the right end of the upper surface of the casing; the connecting mechanism is connected to the air outlet of the air pump through an air pipe; the leakage detection mechanism is placed in the inner cavity of the bracket.

[0005] Preferably, the filter includes a water bucket, a bucket cover, a first conduit and a second conduit, the water bucket is installed at the left end of the upper surface of the base, and filtered water is stored in the water bucket; the bucket cover is screwed on the top of the water bucket; the first conduit and the second conduit are vertically installed on the left and right sides of the top of the bucket cover, respectively, and the top of the second conduit is connected to the air inlet of the air pump through an air pipe.

[0006] Preferably, the bottom end of the first conduit extends to the bottom of the inner cavity of the bucket.

[0007] Preferably, the connecting mechanism includes a first base, an outer toothed ring, a steel belt, a slide, a slider, a splint, a pressing assembly, a second base, a first knob and a spur gear, the first base is hollow; the outer toothed ring can be rotatably placed in the inner cavity of the first base; the steel belt is installed on the right side wall of the outer toothed ring; there are three slides, which are equidistantly arranged on the right side wall of the first base along the circumferential direction; the slider is inserted into the inner cavity of the slide, and the slider is meshingly connected with the steel belt; the splint is installed on the inner side of the slider, and the inner side of the splint is provided with anti-slip edges; the pressing assembly is installed on the left side wall of the first base; the second base is installed on the outer wall of the first base; the first knob is installed on the left side wall of the second base so that it can rotate around its own axis through a bearing; the spur gear is installed on the right end of the first knob, and the spur gear is meshingly connected with the outer toothed ring. The outer toothed ring can be rotated clockwise or counterclockwise by driving the spur gear to rotate by the first knob.

[0008] Preferably, the steel belt is distributed in a spiral shape on the right side wall of the outer gear ring.

[0009] Preferably, the pressing assembly includes a box body, a screw, a second knob, a movable plate, a limit tube, a valve, a pressure gauge, a pressure plate and a rubber pad, and the box body is installed on the left side wall of the first base; the screw is installed on the top of the box body cavity so as to be rotatable around its own axis through a bearing; the second knob is installed on the left end of the screw; one end of the movable plate is screwed on the outer wall of the screw; the limit tube is inserted into the bottom of the box body cavity so as to be slidable left and right, and the outer wall of the limit tube is connected to the other end of the movable plate, and when the screw rotates clockwise or counterclockwise, the rotational force of the screw thread drives the movable plate to move to the left or right, thereby causing the limit tube to move left and right; the valve is installed on the left end of the limit tube, and the left end of the valve is connected to the air outlet of the air pump; the pressure gauge is installed on the left end of the outer wall of the limit tube; the pressure plate is installed on the right end of the limit tube; and the rubber pad is bonded to the right side wall of the pressure plate.

[0010] Preferably, the leakage detection mechanism includes a storage box, a liquid inlet, a valve seat, a rotating shaft, a valve core, a guide groove, a roller, a first brush and a second brush, and the storage box is placed in the inner cavity of the bracket; the liquid inlet is installed on the top of the storage box; the valve seat is installed in the middle of the lower surface of the storage box along the front-to-back direction; the rotating shaft is installed at the center of the inner cavity of the valve seat so as to be able to rotate around its own axis through a bearing; the valve core is installed in the middle of the outer wall of the rotating shaft, and the valve core is adapted to be inserted in the inner cavity of the valve seat, and the outer wall of the valve core is provided with a plurality of guide grooves equidistantly along the circumferential direction; there are two rollers, which are respectively installed at the front and rear ends of the rotating shaft; the first brush and the second brush are respectively installed at the left and right ends of the lower surface of the storage box.

[0011] Preferably, the lower surfaces of the first brush and the second brush are lower than the roller.

[0012] A method for detecting a pressure vessel sealing detection device comprises the following steps: Step 1: Put the clamping plate on the outside of the container interface to be tested, drive the spur gear to rotate through the first knob, and let the steel belt rotate clockwise under the transmission of the spur gear and the outer gear ring. The curved surface of the steel belt presses the slider inward, causing the clamping plate to move inward, and the clamping plate is clamped on the container interface and fixed; Step 2: The screw is driven to rotate counterclockwise by the second knob, and the movable plate drives the limit tube to move rightward under the rotation force of the screw thread, and the pressure plate presses the rubber pad to make close contact with the container interface, thereby realizing the connection between the air pump and the container; Step 3: Turn on the switch, the lithium battery powers the air pump, and the air pump forms a negative pressure in the bucket under its own suction. The external gas enters the filtered water from the first conduit, and the filtered water adsorbs the dust in the gas. The purified gas enters the container under the transportation of the air pump, and the pressure in the container gradually increases until the pressure displayed on the pressure gauge meets the requirements of the container air tightness test. Close the switch and valve. If the value displayed on the pressure gauge remains unchanged, it means that the container is airtight. If the pressure drops, it means that there is a leak in the container. Step 4. When you need to find the leak point of the container, move the storage box so that the roller, the first brush and the second brush are in contact with the surface of the container. Push the roller to move along the welding point of the container. Use the second brush to remove dust from the surface of the container. As the roller rolls, the shaft drives the valve core to rotate. The guide groove transfers the soapy water in the storage box, allowing the soapy water to drip evenly on the surface of the container. Then the first brush applies the soapy water to the surface of the container. Once a leak occurs, the soapy water will produce bubbles. The staff can find the leak point by observing the location of the bubbles with the naked eye.

[0013] The beneficial effects of the present invention are: 1. The present invention allows the spur gear to drive the outer gear ring to rotate clockwise by turning the first knob, and the curved surface of the steel belt squeezes the slider inward, and the clamping plate moves inward to be clamped at the container interface. The screw is then rotated counterclockwise by the second knob, and the rotational force of the screw thread drives the movable plate to move to the right, and the pressure plate presses the rubber pad against the end face of the container interface, so that the limit tube is connected to the container. It can be installed with containers of different calibers, is suitable for air tightness detection of containers of different calibers, and is widely used.

[0014] 2. The present invention can make the roller roll on the surface of the container by moving the storage box, and the valve core rotates with the roller. The guide groove evenly drops soapy water on the surface of the container. With the cooperation of the first brush and the second brush, the dust on the surface of the container is first cleaned, and then the soapy water is evenly applied to the surface of the container. If bubbles are generated in the soapy water, it means that a leak occurs here, which allows the staff to accurately find the leak and facilitates container maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front cross-sectional view of the filter of the present invention; Figure 3 It is a left side cross-sectional view of the connecting mechanism of the present invention; Figure 4 It is a right side view of the first base of the present invention; Figure 5 It is a right side view of the outer gear ring of the present invention; Figure 6 This is a schematic diagram of the structure of the pressing assembly of the present invention; Figure 7 It is a front cross-sectional view of the pressing assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the leakage finding mechanism of the present invention; Fig. 9 It is a front cross-sectional view of the leakage finding mechanism of the present invention.

[0016] In the figure: 1, base; 2, lithium battery; 3, air pump; 4, housing; 5, switch; 6, filter; 7, bracket; 8, connecting mechanism; 9, leakage detection mechanism; 61, bucket; 62, bucket cover; 63, first conduit; 64, second conduit; 81, first base; 82, outer gear ring; 83, steel belt; 84, slideway; 85, slider; 86, clamping plate; 87, pressing assembly; 88, second base; 89, The first knob; 810, spur gear; 871, box body; 872, screw; 873, second knob; 874, movable plate; 875, limit tube; 876, valve; 877, pressure gauge; 878, pressure plate; 879, rubber pad; 91, storage box; 92, liquid inlet; 93, valve seat; 94, rotating shaft; 95, valve core; 96, guide groove; 97, roller; 98, first brush; 99, second brush. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the preferred embodiments of the present invention are further described below in conjunction with specific implementation methods and accompanying drawings.

[0018] See also Figure 1-Figure 9 As shown, the present invention provides a pressure container sealing detection device, including a base 1, a lithium battery 2, an air pump 3, a casing 4 and a switch 5, the lithium battery 2 and the air pump 3 are respectively mounted on the upper surface of the base 1, the casing 4 is fixedly connected to the upper surface of the base 1, the lithium battery 2 and the air pump 3 are protected by the casing 4, the switch 5 is mounted on the upper surface of the casing 4, the switch 5 controls the lithium battery 2 to power the air pump 3, a filter 6 is mounted on the left end of the upper surface of the base 1, the top of the filter 6 is connected to the air inlet of the air pump 3 through an air pipe, the air intake of the air pump 3 is filtered through the filter 6, a bracket 7 is mounted on the right side of the upper surface of the casing 4, the air outlet of the air pump 3 is mounted with a connecting mechanism 8 through the air pipe, and a leakage detection mechanism 9 is placed in the inner cavity of the bracket 7.

[0019] As a preferred embodiment, the filter 6 further includes a bucket 61 installed on the left end of the upper surface of the base 1, the inner cavity of the bucket 61 stores filtered water, a bucket cover 62 is screwed on the top of the bucket 61, and a first conduit 63 and a second conduit 64 are vertically installed on the left and right sides of the top of the bucket cover 62 respectively. The bottom of the first conduit 63 extends to the bottom of the inner cavity of the bucket 61. Under the suction of the air pump 3, a negative pressure is formed in the bucket 61 through the second conduit 64. The gas inhaled by the first conduit 63 preferentially enters the filtered water, adsorbs dust in the gas, and the purified gas enters the air pump 3.

[0020] As a preferred solution, further, the connecting mechanism 8 includes a hollow first base 81, a rotatable outer toothed ring 82 is placed in the inner cavity of the first base 81, a spiral steel belt 83 is installed on the right side wall of the outer toothed ring 82, three slideways 84 are opened equidistantly along the circumference of the right side wall of the first base 81, a slider 85 is inserted into the inner cavity of the slideway 84, and the slider 85 is meshed and connected with the steel belt 83, and a clamping plate 86 is installed on the inner side of the slider 85. When the outer toothed ring 82 rotates clockwise or counterclockwise, the curved surface of the steel belt 83 can be rotated. The slider 85 is squeezed inward or outward, so that all the clamps 86 move inward or outward at the same time. The inner side of the clamp 86 is provided with anti-slip edges to increase the friction force of clamping the interface of the container to be tested. A pressing assembly 87 is installed on the left side wall of the first base 81, and a second base 88 is installed on the side wall of the first base 81. A first knob 89 is installed on the left side wall of the second base 88 through a bearing. A spur gear 810 meshing with the outer tooth ring 82 is installed on the right end of the first knob 89. The outer tooth ring 82 is rotated by turning the first knob 89.

[0021] As a preferred solution, further, the pressing assembly 87 includes a box body 871 installed on the left side wall of the first base 81, a screw 872 capable of rotating around its own axis is installed on the top of the inner cavity of the box body 871 through a bearing, a second knob 873 is installed on the left end of the screw 872, one end of a moving plate 874 is screwed to the outer wall of the screw 872, and a limit tube 875 capable of sliding left and right is laterally inserted at the bottom of the inner cavity of the box body 871. When the screw 872 rotates clockwise or counterclockwise, the threaded rotation force of the screw 872 can drive the moving plate 874 to drive the limit The limiting tube 875 moves to the left or right, a valve 876 is installed at the left end of the limiting tube 875, the left end of the valve 876 is connected to the air outlet of the air pump 3 through an air pipe, a pressure gauge 877 is installed at the left end of the outer wall of the limiting tube 875, and the air pressure inside the container to be tested is displayed by the pressure gauge 877, a pressure plate 878 is installed at the right end of the limiting tube 875, and a rubber pad 879 is bonded to the right side wall of the pressure plate 878, and the rubber pad 879 is elastic. When the pressure plate 878 is pressed against the surface of the container interface, the rubber pad 879 seals the limiting tube 875 and the container.

[0022] As a preferred solution, further, the leakage detection mechanism 9 includes a storage box 91 placed in the inner cavity of the bracket 7, the storage box 91 is used to store soapy water, the upper and lower ends of the storage box 91 are respectively equipped with a liquid inlet 92 and a valve seat 93, a rotating shaft 94 capable of rotating around its own axis is installed through a bearing in the middle of the inner cavity of the valve seat 93, a valve core 95 plugged into the inner cavity of the valve seat 93 is installed on the outer wall of the rotating shaft 94, and a plurality of guide grooves 96 are opened on the outer wall of the valve core 95 at equal intervals along the circumferential direction. When the valve core 95 rotates, the guide grooves 96 take away the soapy water in the storage box 91, allowing the soapy water to drip on the welding points of the container, etc., which are prone to leakage. At the leaking connection point, rollers 97 are installed at both ends of the rotating shaft 94. By rolling the rollers 97 on the container, the rotating shaft 94 can drive the valve core 95 to rotate. The first brush 98 and the second brush 99 are respectively installed at the left and right ends of the lower surface of the storage box 91. When the storage box 91 moves from left to right, the positions of the first brush 98 and the second brush 99 are lower than the roller 97. When the roller 97 contacts the container, the first brush 98 and the second brush 99 can also play a brushing role. The second brush 99 first removes dust on the surface of the container, and the first brush 98 then evenly applies soapy water on the surface of the container.

[0023] Working principle: Step 1: Put the clamping plate 86 on the outside of the container interface to be tested, drive the spur gear 810 to rotate through the first knob 89, and let the steel belt 83 rotate clockwise under the transmission of the spur gear 810 and the outer gear ring 82. The curved surface of the steel belt 83 presses the slider 85 inward, causing the clamping plate 86 to move inward, and the clamping plate 86 is clamped on the container interface and fixed; Step 2: The screw 872 is driven to rotate counterclockwise by the second knob 873. Under the rotation force of the screw 872, the movable plate 874 drives the limiting tube 875 to move rightward, and the pressing plate 878 presses the rubber pad 879 to be in close contact with the container interface, thereby realizing the connection between the air pump 3 and the container; Step 3, turn on the switch 5, the lithium battery 2 supplies power to the air pump 3, the air pump 3 forms a negative pressure in the water bucket 61 under its own suction, the external gas enters the filtered water from the first conduit 63, the filtered water adsorbs the dust in the gas, the purified gas enters the container under the transportation of the air pump 3, the pressure in the container gradually increases until the pressure displayed on the pressure gauge 877 meets the requirements of the container air tightness test, close the switch 5 and the valve 876, if the value displayed on the pressure gauge 877 remains unchanged, it means that the air tightness of the container is good, if the pressure drops, it means that there is a leak in the container; Step 4. When the leak point of the container needs to be found, move the storage box 91, let the roller 97, the first brush 98 and the second brush 99 all contact the surface of the container, push the roller 97 to move along the welding point of the container, and the second brush 99 removes the dust on the surface of the container. As the roller 97 rolls, the shaft 94 drives the valve core 95 to rotate, and the guide groove 96 transfers the soapy water in the storage box 91, allowing the soapy water to drip evenly on the surface of the container. Then the first brush 98 applies the soapy water on the surface of the container. Once a leak occurs, the soapy water will produce bubbles, and the staff can find the leak point by observing the location where the bubbles are generated with the naked eye.

[0024] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A pressure container sealing detection device, comprising a base (1), a lithium battery (2), an air pump (3), a housing (4) and a switch (5), wherein the lithium battery (2) and the air pump (3) are respectively mounted on the front and rear sides of the upper surface of the base (1), the housing (4) is fixedly connected to the upper surface of the base (1), the housing (4) protects the lithium battery (2) and the air pump (3), the switch (5) is mounted on the upper surface of the housing (4), and the switch (5) is respectively electrically connected to the lithium battery (2) and the air pump (3), and the lithium battery (2) is controlled by the switch (5) to supply power to the air pump (3), characterized in that: The air pressure container sealing detection device also includes: A filter (6) is mounted on the left end of the upper surface of the base (1), and the top of the filter (6) is connected to the air inlet of the air pump (3) through an air pipe, so that the gas entering the air pump (3) is filtered through the filter (6); A bracket (7) fixedly connected to the right end of the upper surface of the housing (4); A connecting mechanism (8) connected to the air outlet of the air pump (3) via an air pipe; A leakage detection mechanism (9) is placed in the inner cavity of the bracket (7); The filter (6) comprises: A water bucket (61) is mounted on the left end of the upper surface of the base (1), and filtered water is stored in the water bucket (61); A bucket cover (62) screwed to the top of the bucket (61); The first conduit (63) and the second conduit (64) are respectively vertically mounted on the left and right sides of the top of the barrel cover (62), and the top of the second conduit (64) is connected to the air inlet of the air pump (3) through an air pipe.

2. A pressure vessel sealing detection device according to claim 1, characterized in that: The bottom end of the first conduit (63) extends to the bottom of the inner cavity of the water bucket (61).

3. A pressure vessel sealing detection device according to claim 2, characterized in that: The connecting mechanism (8) comprises: The first base (81) is hollow; An outer gear ring (82) rotatably placed in the inner cavity of the first base (81); A steel belt (83) mounted on the right side wall of the outer gear ring (82); Three slideways (84) are arranged at equal intervals along the circumferential direction on the right side wall of the first base (81); A slider (85) is inserted into the inner cavity of the slideway (84), and the slider (85) is meshingly connected with the steel belt (83); A clamping plate (86) is mounted on the inner side of the slider (85), and an anti-slip edge is provided on the inner side of the clamping plate (86); A pressing assembly (87) mounted on the left side wall of the first base (81); A second base (88) mounted on an outer wall of the first base (81); A first knob (89) is mounted on the left side wall of the second base (88) via a bearing so as to be rotatable around its own axis; A spur gear (810) is mounted on the right end of the first knob (89), and the spur gear (810) is meshingly connected with the outer gear ring (82). The spur gear (810) is driven to rotate by the first knob (89), so that the outer gear ring (82) can rotate clockwise or counterclockwise.

4. A pressure vessel sealing detection device according to claim 3, characterized in that: The steel belt (83) is distributed in a spiral shape on the right side wall of the outer gear ring (82).

5. A pressure vessel sealing detection device according to claim 4, characterized in that: The pressing assembly (87) comprises: A box body (871) is mounted on the left side wall of the first base (81); A screw (872) is mounted on the top of the inner cavity of the box body (871) via a bearing so as to be rotatable around its own axis; A second knob (873) mounted on the left end of the screw rod (872); A movable plate (874), one end of which is screwed to the outer wall of the screw rod (872); The limiting tube (875) is inserted into the bottom of the inner cavity of the box body (871) so as to slide left and right, and the outer wall of the limiting tube (875) is connected to the other end of the movable plate (874). When the screw rod (872) rotates clockwise or counterclockwise, the thread rotation force of the screw rod (872) drives the movable plate (874) to move left or right, thereby causing the limiting tube (875) to move left and right. A valve (876) is installed at the left end of the limiting tube (875), and the left end of the valve (876) is connected to the air outlet of the air pump (3); A pressure gauge (877) is installed at the left end of the outer wall of the limiting tube (875); A pressing plate (878) is mounted on the right end of the limiting tube (875); The rubber pad (879) is bonded to the right side wall of the pressing plate (878).

6. A pressure vessel sealing detection device according to claim 5, characterized in that: The leakage finding mechanism (9) comprises: A storage box (91) is placed in the inner cavity of the bracket (7); A liquid inlet (92) mounted on the top of the storage box (91); A valve seat (93) is installed in the middle of the lower surface of the storage box (91) along the front-to-back direction; A rotating shaft (94) is mounted at the center of the inner cavity of the valve seat (93) via a bearing so as to be rotatable about its own axis; A valve core (95) is mounted in the middle of the outer wall of the rotating shaft (94), and the valve core (95) is adapted to be inserted into the inner cavity of the valve seat (93), and a plurality of guide grooves (96) are formed on the outer wall of the valve core (95) at equal intervals along the circumferential direction; Two rollers (97) are mounted on the front and rear ends of the rotating shaft (94) respectively; The first brush (98) and the second brush (99) are respectively mounted on the left and right ends of the lower surface of the storage box (91).

7. A pressure vessel sealing detection device according to claim 6, characterized in that: The lower surfaces of the first brush (98) and the second brush (99) are lower than the roller (97).

8. A method for detecting the sealing of a pressure vessel, which is applied to a device for detecting the sealing of a pressure vessel according to claim 7, characterized in that: The following steps are involved: Step 1: The clamping plate (86) is placed on the outer side of the interface of the container to be tested, and the spur gear (810) is driven to rotate by the first knob (89), so that the steel belt (83) rotates clockwise under the transmission of the spur gear (810) and the outer gear ring (82), and the curved surface of the steel belt (83) presses the slider (85) inwardly, so that the clamping plate (86) moves inwardly, and the clamping plate (86) is clamped on the container interface and fixed; Step 2: The screw rod (872) is driven to rotate counterclockwise by the second knob (873), and the movable plate (874) drives the limiting tube (875) to move rightward under the rotation force of the screw thread (872), and the pressing plate (878) presses the rubber pad (879) to make close contact with the container interface, thereby achieving connection between the air pump (3) and the container; Step 3, turn on the switch (5), the lithium battery (2) supplies power to the air pump (3), the air pump (3) forms a negative pressure in the water bucket (61) under the action of its own suction, the external gas enters the filtered water from the first conduit (63), the filtered water adsorbs the dust in the gas, the purified gas enters the container under the transportation of the air pump (3), the pressure in the container gradually increases until the air pressure displayed on the pressure gauge (877) meets the requirements of the container air tightness test, the switch (5) and the valve (876) are closed, if the value displayed on the pressure gauge (877) remains unchanged, it means that the air tightness of the container is good, if the pressure drops, it means that there is a leak in the container; Step 4, when it is necessary to find the leaking point of the container, move the storage box (91) so that the roller (97), the first brush (98) and the second brush (99) are all in contact with the surface of the container, and push the roller (97) to move along the welding point of the container. The second brush (99) removes dust from the surface of the container. As the roller (97) rolls, the shaft (94) drives the valve core (95) to rotate, and the guide groove (96) transfers the soapy water in the storage box (91) so that the soapy water evenly drips on the surface of the container. Then, the first brush (98) applies the soapy water on the surface of the container. Once a leak occurs, the soapy water will generate bubbles, and the staff can find the leaking point by observing the bubble generation position with the naked eye.

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