Follow-up metal drum sealing detection equipment and detection method

Abstract

The invention relates to the technical field of air tightness detection, in particular to follow-up metal drum sealing detection equipment and a detection method, the follow-up metal drum sealing detection equipment comprises a machine table and a rotating disc rotationally mounted on the machine table, a fixed rod is fixed on the rotating disc, and a controller is fixed at the end part of the fixed rod; the air cylinder is fixed in the controller, a sealing disc is fixed to the telescopic end of the air cylinder, a pump air cylinder is fixed to the sealing disc, a sealing air bag is fixed to the pump air cylinder, and a partition plate is fixed in the pump air cylinder; the conduction switching mechanism is arranged in the pump air cylinder, and the conduction switching mechanism is connected with a piston disc which is in sliding sealing connection with the pump air cylinder; the inner supporting mechanism is arranged in the pump air cylinder, a plurality of sealing blocks which are circumferentially distributed at equal intervals are connected to the inner supporting mechanism, a follow-up adjusting mechanism is further arranged in the pump air cylinder, when the air pressure in the pump air cylinder is changed, air can be pumped into the sealing air bag firstly through a conduction switching mechanism, and then air can be pumped into the metal barrel; therefore, the accuracy of detection results is ensured.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing technology, specifically a follow-up metal barrel sealing testing device and testing method. Background Technology

[0002] As a widely used packaging and transportation container, the sealing performance of metal drums is crucial to ensuring the safe storage and transportation of their contents. Therefore, rigorous airtightness testing must be conducted before metal drums are produced or reused.

[0003] This detection typically involves injecting a gas (such as air) at a certain pressure into a sealed container and monitoring the pressure drop over a certain period of time to determine if a leak exists.

[0004] In existing technologies, the key step in airtightness testing of metal drums is to quickly and reliably seal their openings to create a sealed testing chamber. The most common sealing method is to use a rigid or semi-rigid "sealing plug," which is typically designed as a tapered cylinder or stepped shaft. This plug is mechanically forced into the opening of the metal drum, relying on the large static friction generated by the interference fit between its tapered surface and the inner wall of the drum opening to achieve a seal. However, in order to achieve an interference fit, rigid or semi-rigid plugs must be forced into the barrel opening with a large axial force. This process generates intense sliding friction between the conical surface of the plug and the inner wall of the metal barrel opening. Long-term use will severely wear down the sealing surface of the plug, reduce its sealing performance and shorten its service life. The friction will also scratch or wear down the inner wall of the metal barrel opening. For some barrels that need to be reused or have a coating on the inner wall, this may affect the barrel's own anti-corrosion performance or cause secondary pollution. Summary of the Invention

[0005] The purpose of this invention is to provide a follow-up metal barrel sealing detection device and detection method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A follow-up metal barrel sealing detection device, comprising: The machine base, and a rotating disk mounted on the machine base, with a fixed rod fixed on the rotating disk and a controller fixed to the end of the fixed rod; Also includes: A cylinder is fixed inside the controller. A sealing disc is fixed to the telescopic end of the cylinder. A pump cylinder is fixed on the sealing disc. A sealing air bag is fixed on the pump cylinder. A partition is fixed inside the pump cylinder. A switching mechanism is provided inside the pump cylinder. A piston disc is connected to the switching mechanism and is slidably sealed to the pump cylinder. The piston disc can move when the air pressure inside the pump cylinder changes, and the switching mechanism can adjust the connection state between the sealing airbag and the pump cylinder. An internal support mechanism is provided inside the pump cylinder. Multiple sealing blocks are connected to the internal support mechanism and are distributed equidistantly in a circular pattern. A follow-up adjustment mechanism is also provided inside the pump cylinder. The follow-up adjustment mechanism can adjust the distance between the sealing blocks through the internal support mechanism when the piston disc moves.

[0007] As a further embodiment of the present invention: the conduction switching mechanism includes a guide column fixed inside the pump cylinder and fixedly connected to the partition plate, the guide column being slidably and sealingly connected to the piston disc, and a second spring being sleeved on the guide column, the two ends of the second spring respectively abutting against the pump cylinder and the piston disc; It also includes a sealing assembly and a conveying assembly disposed within the pump cylinder.

[0008] As a further embodiment of the present invention: the sealing assembly includes a first air supply hole and a second air supply hole formed on the outer circumference of the pump cylinder, and a sealing ring is fixed on the piston disc. The outer circumference of the sealing ring is formed with an exhaust hole that communicates and cooperates with the first air supply hole and the second air supply hole.

[0009] As a further embodiment of the present invention: the conveying assembly includes a first air supply pipe and a second air supply pipe fixed to the outer circumference of the pump cylinder, the first air supply pipe being connected to the first air supply hole and the sealing airbag, and the second air supply pipe being connected to the second air supply hole.

[0010] As a further embodiment of the present invention: the internal support mechanism includes a support plate fixed inside the pump cylinder, and a plurality of sliding grooves are formed on the support plate in a circumferentially equidistant manner, and sliding blocks are slidably installed in the sliding grooves.

[0011] As a further embodiment of the present invention: the inner support mechanism further includes a support sleeve fixed to the side wall of the sliding block, a support rod axially sliding inside the support sleeve, the support rod being fixedly connected to the sealing block, and a first spring abutting against the support rod being fixed inside the support sleeve.

[0012] As a further embodiment of the present invention: the follow-up adjustment mechanism includes a rotating rod rotatably installed in the pump cylinder, a movable plate is fixed at the end of the rotating rod, a plurality of inclined grooves are formed on the movable plate in a circumferentially equidistant manner, and a limiting post is fixed on the sliding block to slide and engage with the inclined grooves.

[0013] As a further embodiment of the present invention: the follow-up adjustment mechanism further includes a spiral groove and a vertical groove formed on the outer circumference of the rotating rod, a sliding sleeve sleeved on the rotating rod is fixed on the piston disc, and a limiting block is fixed on the inner wall of the sliding sleeve to slide and engage with the spiral groove and the vertical groove.

[0014] As a further embodiment of the present invention: a first guide plate and a second guide plate are rotatably mounted on the machine base, and a guide plate is fixed on the machine base. The guide plate cooperates with the first guide plate and the second guide plate to form a feeding channel.

[0015] A method for detecting the seal of a follow-up metal barrel includes the following steps: Step 1: Guide the metal bucket to move onto the rotating plate through the feeding channel; Step 2: Under the action of the cylinder, control the sealing disc to fit against the top of the metal barrel, and control the pump cylinder to insert into the metal barrel; Step 3: Pump air into the pump cylinder. Under the action of air pressure, control the piston disc to move, thereby inflating the sealing airbag through the conduction switching mechanism. Under the action of the sealing airbag, the inner wall of the metal barrel is sealed. Step 4: The piston disc drives the follow-up adjustment mechanism to move, and controls the sealing block to open through the internal support mechanism, so as to guide the sealing airbag to fit tightly against the inner wall of the metal barrel. When the sealing airbag is fully inflated, the switching mechanism controls the gas in the pump cylinder to be delivered to the metal barrel for airtightness testing.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts a dual sealing method combining "sealing disc end face sealing" and "sealing airbag radial sealing". First, the sealing disc and its conical sealing ring driven by the cylinder achieve preliminary centering and first-level end face sealing. Subsequently, the airbag expands uniformly and fits the barrel wall with flexible pressure, completely avoiding sliding friction between rigid components and barrel wall. The flexible characteristics of the airbag enable it to adaptively compensate for the dimensional tolerance, ovality and slight deformation of the inner diameter of the barrel opening, ensuring that an effective seal can be formed under various working conditions, thus improving the versatility and reliability of the equipment.

[0017] The switching mechanism enables high-pressure gas to be rapidly and preferentially injected into the sealing bladder initially, causing it to expand quickly and establish a seal. As the bladder pressure increases, the pressure inside the pump cylinder pushes the piston disc, which, under the action of the first air inlet, gradually reduces and eventually cuts off the airflow to the bladder, achieving a "soft landing" and stabilizing the bladder pressure, preventing overfilling. After the gas path automatically switches, gas is injected into the container through the teardrop-shaped second air inlet at a low flow rate, gradually increasing to avoid pressure shocks disturbing the sealing interface.

[0018] Through the coordination of the follow-up adjustment mechanism and the internal support mechanism, the linear motion of the piston disc is converted into the radial synchronous expansion of multiple sealing blocks. While the sealing airbag is inflated, the sealing blocks synchronously approach and ultimately support the inner wall of the airbag from the inside. After the airbag is in contact with the barrel wall, the continued expansion trend of the sealing blocks is converted into a continuous radial support force on the airbag, and the shape of the airbag is stabilized from the inside, preventing it from being excessively deformed, rolling or detaching from the barrel wall when high-pressure detection gas is subsequently injected into the barrel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of a follow-up metal barrel sealing detection device.

[0020] Figure 2 This is a schematic diagram of the internal structure of the machine tool in one embodiment of a follow-up metal barrel sealing testing device.

[0021] Figure 3 for Figure 2 Another structural diagram from another angle.

[0022] Figure 4 This is a schematic diagram of the rotating disk, the first guide disk, and the second guide disk in one embodiment of a follow-up metal barrel sealing detection device.

[0023] Figure 5 This is a schematic diagram of the structure of the conduction switching mechanism, pump cylinder, and sealing disc in one embodiment of a follow-up metal barrel sealing detection device.

[0024] Figure 6 This is a schematic cross-sectional view of the sealing disc and pump cylinder in one embodiment of a follow-up metal barrel sealing testing device.

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure 8 This is a schematic diagram of the internal support mechanism and pump cylinder in one embodiment of a follow-up metal barrel sealing detection device.

[0027] Figure 9 This is a schematic diagram of the internal structure of the pump cylinder in one embodiment of a follow-up metal barrel sealing detection device.

[0028] Figure 10 This is an exploded structural diagram of the internal support mechanism and the follow-up adjustment mechanism in one embodiment of a follow-up metal barrel sealing detection device.

[0029] Figure 11 This is an exploded structural diagram of part of the follow-up adjustment mechanism and part of the conduction switching mechanism in one embodiment of the follow-up metal barrel sealing detection equipment.

[0030] In the diagram: 1. Machine base; 2. First guide plate; 3. Guide plate; 4. Second guide plate; 5. Rotary plate; 501. Arc plate; 6. Fixed rod; 7. Controller; 8. Cylinder; 9. Sealing plate; 10. Sealing ring; 11. Pump cylinder; 1101. First air inlet; 1102. Second air inlet; 12. Air inlet pipe; 13. Sealing airbag; 14. Partition plate; 1401. Through hole; 15. Support plate; 1501. Slide groove; 16. Sliding block ; 1601, Limiting post; 17, Support sleeve; 18, Support rod; 19, Sealing block; 20, First spring; 21, Rotating rod; 2101, Spiral groove; 2102, Vertical groove; 22, Movable plate; 2201, Inclined groove; 23, Sliding sleeve; 2301, Limiting block; 24, Piston disc; 2401, Sealing ring; 2402, Exhaust hole; 25, Guide post; 26, Second spring; 27, First air supply pipe; 28, Second air supply pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0033] Please see Figures 1-11 In this embodiment of the invention, a follow-up metal barrel sealing detection device includes: The machine base 1 and the rotating disk 5 rotatably mounted on the machine base 1, the rotating disk 5 is fixed with a fixing rod 6, and the end of the fixing rod 6 is fixed with a controller 7; Also includes: Cylinder 8 is fixed inside controller 7. A sealing disc 9 is fixed to the telescopic end of cylinder 8. A pump cylinder 11 is fixed on the sealing disc 9. A sealing air bag 13 is fixed on the pump cylinder 11. A partition 14 is fixed inside the pump cylinder 11. A switching mechanism is provided inside the pump cylinder 11. A piston disc 24 is connected to the switching mechanism and is slidably and sealingly connected to the pump cylinder 11. The piston disc 24 can move when the air pressure inside the pump cylinder 11 changes, and the switching mechanism can adjust the connection state of the sealing airbag 13 and the pump cylinder 11. An internal support mechanism is provided inside the pump cylinder 11. Multiple sealing blocks 19 are connected to the internal support mechanism and are distributed circumferentially. A follow-up adjustment mechanism is also provided inside the pump cylinder 11. The follow-up adjustment mechanism can adjust the distance between the sealing blocks 19 through the internal support mechanism when the piston disc 24 moves.

[0034] Specifically, when performing a sealing test on a metal drum, it is necessary to ensure that the top opening of the metal drum is sealed. To achieve this, cylinder 8 pushes the sealing disc 9 towards the metal drum, causing the pump cylinder 11 to move. When the pump cylinder 11 is inserted into the metal drum and the sealing disc 9 is tightly fitted to the top of the metal drum, air is pumped into the pump cylinder 11, changing the air pressure inside. Under this pressure, the piston disc 24 is pushed, and the piston disc 24 controls the switching mechanism, causing the gas in the pump cylinder 11 to be first delivered to the sealing airbag 13. When the sealing airbag 13... When the internal air pressure reaches the set value, the outer side of the sealing airbag 13 will be tightly fitted to the inner wall of the metal barrel, and the metal barrel will be in a completely sealed state. The piston disc 24 controls the gas in the pump cylinder 11 to no longer be delivered to the sealing airbag 13 through the conduction switching mechanism, and directly pumps air into the sealed metal barrel to perform air tightness testing. During this process, the piston disc 24 will also drive the follow-up adjustment mechanism to move, and control the sealing block 19 to open through the internal support mechanism. Under the action of the sealing block 19, the sealing airbag 13 is internally supported to ensure that the sealing airbag 13 can be tightly fitted to the metal barrel.

[0035] Please see Figures 1-4 The machine base 1 is rotatably mounted with a first guide plate 2 and a second guide plate 4. The machine base 1 is fixed with a guide plate 3, which cooperates with the first guide plate 2 and the second guide plate 4 to form a feeding channel.

[0036] It should be noted that the rotating disk 5 is fixed with arc-shaped plates 501 that are equidistantly distributed around the circumference and correspond to the sealing disk 9. The sealing disk 9 is fixed with a sealing ring 10, which is arranged in a conical ring shape. The top of the pump cylinder 11 is fixed with an air inlet pipe 12 that passes through the sealing disk 9 and is located in the controller 7. The air inlet pipe 12 is connected to the air pump and is used to deliver gas to the pump cylinder 11. A through hole 1401 is formed on the partition plate 14. When the airtightness of the metal drum needs to be tested, the metal drum is guided by the conveyor belt to be placed in the feeding channel formed by the combination of the first guide plate 2 and the guide plate 3. The metal drum is intermittently fed under the action of the first guide plate 2. When the first guide plate 2 moves to the position that matches the corresponding arc plate 501, the metal drum is placed on the rotating disk 5 and is just located in the annular cavity formed by the combination of the first guide plate 2 and the arc plate 501. At this time, the first guide plate 2 continues to rotate and separates from the metal drum. The rotating disk 5 will drive the metal drum to move around the fixed rod 6 through the arc plate 501. Simultaneously, cylinder 8 operates and controls the sealing disc 9 to move towards the metal barrel, thereby driving the pump cylinder 11 to move synchronously. The pump cylinder 11 will be inserted into the metal barrel. Since the sealing airbag 13 is in a deflated state, the sealing airbag 13 will also enter the metal barrel. When the sealing ring 10 is in contact with the top opening wall of the metal barrel, if the position of the metal barrel is slightly off, the sealing ring 10 can guide the metal barrel to move to a position coaxial with the pump cylinder 11 under the action of the conical surface, thereby achieving the positioning of the metal barrel. When the sealing disc 9 is tightly in contact with the top of the metal barrel, the first stage of sealing of the metal barrel is completed. At this time, cylinder 8 stops working. Subsequently, the air pump operates and delivers gas to the pump cylinder 11 through the air inlet pipe 12, increasing the air pressure inside the pump cylinder 11. This, in turn, controls the switching mechanism via the piston disc 24 to deliver gas to the sealing airbag 13 and the metal barrel. After the test is completed, the cylinder 8 controls the sealing disc 9 and the pump cylinder 11 to separate from the metal barrel. Simultaneously, with the cooperation of the arc plate 501 and the second guide disc 4, the metal barrel is controlled to separate from the rotating disc 5 and transported to the designated position via the conveyor belt.

[0037] Please see Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 11The switching mechanism includes a guide post 25 fixed inside the pump cylinder 11 and fixedly connected to the partition plate 14. The guide post 25 is slidably and sealingly connected to the piston disc 24. A second spring 26 is sleeved on the guide post 25, and the two ends of the second spring 26 abut against the pump cylinder 11 and the piston disc 24, respectively. It also includes a sealing assembly and a conveying assembly disposed inside the pump cylinder 11. The sealing assembly includes a first air inlet 1101 and a second air outlet 1101 formed on the outer circumferential wall of the pump cylinder 11. The piston disc 24 is fixed with a sealing ring 2401. The outer circumferential wall of the sealing ring 2401 has an exhaust hole 2402 that communicates and cooperates with the first air supply hole 1101 and the second air supply hole 1102. The conveying assembly includes a first air supply pipe 27 and a second air supply pipe 28 fixed to the outer circumferential wall of the pump cylinder 11. The first air supply pipe 27 is connected to the first air supply hole 1101 and the sealing airbag 13, and the second air supply pipe 28 is connected to the second air supply hole 1102.

[0038] In detail, the first air inlet 1101 and the second air inlet 1102 are symmetrically arranged, and the first air inlet 1101 is arranged with a gradually narrowing opening, while the second air inlet 1102 is arranged with a gradually expanding opening. In the initial state, the air pressure in the pump cylinder 11 is within the normal range, the piston disc 24 is not subjected to air pressure thrust, and is located at the end of its stroke near the partition 14, that is, the distance between the piston disc 24 and the pump cylinder 11 away from the intake pipe 12 is the largest, and the extension of the second spring 26 in its natural state is greater than the maximum distance between the piston disc 24 and the pump cylinder away from the intake pipe 12. Therefore, the second spring 26 is in a pre-compressed state and always provides the piston disc 24 with a thrust in the direction of the partition 14. In this state, the exhaust port 2402 is in a conductive state with the first air supply port 1101 and is in a state of maximum conductivity with the first air supply port 1101. The second air supply port 1102 and the exhaust port 2402 are in a misaligned state. When the airtightness of the metal barrel needs to be tested, the pump cylinder 11 and the sealing airbag 13 are inserted into the metal barrel under the action of the cylinder 8, and the sealing plate 9 is tightly fitted to the top of the metal barrel. Then, the air pump injects gas into the pump cylinder 11 through the air inlet pipe 12. The gas pressure in the pump cylinder 11 gradually increases. Since the exhaust port 2402 and the large opening end of the first air supply port 1101, which is shaped like an inverted water droplet, are completely overlapped in the initial state, the maximum conduction cross-sectional area is maintained. Most of the gas passes through this low-resistance passage and is preferentially and rapidly transported to the inside of the sealing airbag 13 through the first air supply pipe 27. The sealing airbag 13 is rapidly inflated and expanded. Its outer wall quickly contacts the inner wall of the metal barrel and begins to apply radial pressure. As the sealing airbag 13 expands, its internal pressure rises, and the resistance to subsequent airflow also increases. At the same time, the continuous intake of air into the pump cylinder 11 causes its pressure to accumulate. When the effective air pressure thrust acting on the piston disc 24 exceeds the sum of the pre-compression elastic force of the second spring 26 and the frictional resistance, the piston disc 24 begins to overcome the resistance and moves axially away from the partition plate 14 along the guide column 25. The piston disc 24 drives the sealing ring 2401 and the exhaust port 2402 to move synchronously. Since the first air inlet 1101 is shaped like an inverted water droplet, the connection size between the exhaust port 2402 and the first air inlet 1101 gradually decreases, and the gas flow rate to the sealing airbag 13 decreases. This provides a "soft landing" platform for the internal pressure of the sealing airbag 13, so that after the pressure reaches an effective value that is sufficient to tightly fit the inner wall of the metal barrel, it will not rise excessively due to continuous high flow inflation, thereby avoiding overpressure damage to the airbag or excessive impact on the barrel wall, ensuring the gentleness and safety of the sealing process. When the pressure inside the pump cylinder 11 reaches the set value, the exhaust port 2402 and the first air supply port 1101 are in a state of complete misalignment, and the air passage to the sealing airbag 13 is completely cut off. The piston disc 24 will continue to move. When the exhaust port 2402 begins to overlap with the tip of the teardrop-shaped second air supply port 1102, the gas in the pump cylinder 11 will be delivered to the second air supply pipe 28 through the exhaust port 2402 and the second air supply port 1102, and then delivered to the metal barrel. This low-flow start-up method effectively prevents the pressure shock or sealing interface disturbance that may be caused by the high-pressure gas rushing into the metal barrel at the moment of switching the air passage. As the piston disc 24 continues to move, the overlapping area of ​​the exhaust port 2402 and the second air supply port 1102 gradually increases, and the gas flow rate into the metal barrel also increases steadily until the preset maximum inflation rate is reached. When the air pressure inside the pump cylinder 11 reaches the set value required for detection again, the air inlet pipe 12 will no longer deliver gas. Since a pressure sensor is installed inside the pump cylinder 11, it can detect whether the air pressure inside the metal barrel will change under the action of the pressure sensor, thereby realizing the airtightness detection of the metal barrel.

[0039] Please see Figures 6-11 The internal support mechanism includes a support plate 15 fixed inside the pump cylinder 11. The support plate 15 has a plurality of circumferentially equidistant sliding grooves 1501. A sliding block 16 is slidably installed in the sliding grooves 1501. The internal support mechanism also includes a support sleeve 17 fixed to the side wall of the sliding block 16. A support rod 18 is axially slidable inside the support sleeve 17. The support rod 18 is fixedly connected to the sealing block 19. A first spring 20 that abuts against the support rod 18 is fixed inside the support sleeve 17.

[0040] Please see Figures 6-11The follow-up adjustment mechanism includes a rotating rod 21 rotatably installed in the pump cylinder 11. A movable plate 22 is fixed at the end of the rotating rod 21. A plurality of inclined grooves 2201 are formed on the movable plate 22 in a circumferentially evenly distributed manner. A limiting post 1601 that slides and engages with the inclined grooves 2201 is fixed on the sliding block 16. The follow-up adjustment mechanism also includes a spiral groove 2101 and a vertical groove 2102 formed on the outer circumference of the rotating rod 21. A sliding sleeve 23 sleeved on the rotating rod 21 is fixed on the piston disc 24. A limiting block 2301 that slides and engages with the spiral grooves 2101 and the vertical grooves 2102 is fixed on the inner wall of the sliding sleeve 23.

[0041] Furthermore, the support sleeve 17 penetrates the pump cylinder 11 and is placed inside the sealing airbag 13. In the initial state, the piston disc 24 is located at the end of its stroke near the partition 14. The piston disc 24 will control the limiting block 2301 to be located at the end of its stroke on the side of the spiral groove 2101 away from the vertical groove 2102 through the sliding sleeve 23. Under the action of the inclined groove 2201 and the limiting post 1601, the sliding block 16 is located at the end of its stroke on the side of the sliding groove 1501, and the distance between multiple sliding blocks 16 is the smallest, making the distance between multiple sealing blocks 19 the largest. The support rod 18 is located at the end of its stroke away from the sliding block 16, that is, the distance between the support rod 18 and the sliding block 16 is the largest. The elongation of the first spring 20 in its natural state is greater than the maximum distance between the support rod 18 and the sliding block 16. Therefore, the first spring 20 is in a pre-compressed state and always provides the support rod 18 with a thrust in the direction away from the support sleeve 17. When an airtightness test is required, the gas in the pump cylinder 11 will gradually enter the sealed airbag 13 through the exhaust port 2402 and the first air supply port 1101. Its outer wall will gradually come into contact with the inner wall of the metal barrel. At the same time, as the gas is continuously injected, the air pressure inside the pump cylinder 11 will rise synchronously. The rising air pressure will act on the piston disc 24. When the thrust generated exceeds the resistance of the second spring 26, the piston disc 24 will start to move axially along the guide column 25. The movement of the piston disc 24 will drive the sliding sleeve 23 fixed thereto to move synchronously. The sliding sleeve 23 also drives the limiting block 2301 to slide along the spiral groove 2101. Under the action of the limiting block 2301 and the spiral groove 2101, the linear motion of the sliding sleeve 23 is converted into the rotational motion of the rotating rod 21 around its own axis. The rotation of the rotating rod 21 drives the movable plate 22 fixed at its end to rotate synchronously. The contour of the inclined groove 2201 on the movable plate 22 slides and engages with the limiting post 1601 fixed on the sliding block 16. Since the sliding block 16 is constrained by the support plate 15, Within the slide groove 1501, sliding is only possible radially along the slide groove 1501. The rotation of the movable plate 22, through the cooperation of the inclined groove 2201 and the limiting post 1601, forces multiple sliding blocks 16 to slide simultaneously along their respective slide grooves 1501 in a direction away from the central axis of the pump cylinder 11 (i.e., radially outward). The radial movement of the sliding blocks 16 is transmitted to the sealing blocks 19 through the support sleeve 17 and the support rod 18, driving multiple sealing blocks 19 to move outward synchronously and gradually approach the inner wall of the expanding sealing airbag 13. During the inflation phase of the sealing airbag 13, the speed at which the sealing block 19 moves outward is coordinated with the speed at which the sealing airbag 13 expands. When the outer wall of the sealing airbag 13 is in contact with the inner wall of the metal barrel, the sealing block 19 will move to the position in contact with the inner wall of the sealing airbag 13, making the sealing block 19 unable to continue to move freely outward. Meanwhile, the sliding block 16 continues to attempt to move outward under the continuous drive of the inclined groove 2201. This causes the support rod 18 to be forced to slide inward along the axial direction of the support sleeve 17, thereby further compressing the first spring 20, which is in a pre-compressed state. The rebound force generated by the compression of the first spring 20 is directly applied to the sealing block 19 through the support rod 18, and then transformed into a uniform and continuous radial support force of the sealing block 19 on the inner wall of the sealing airbag 13. When the air pressure inside the pump cylinder 11 continues to rise, driving the piston disc 24 to move to the critical position where the exhaust port 2402 and the first air supply port 1101 are completely misaligned (i.e., the sealing airbag 13 is fully inflated and the air passage is cut off), the limiting block 2301 on the sliding sleeve 23 moves to the end of the spiral groove 2101 and enters the vertical groove 2102 connected to it. At this time, the rotating rod 21 reaches its maximum designed rotation angle, the movable plate 22 stops rotating, and correspondingly, the limiting post 1601 moves to the other end of the inclined groove 2201, the sliding block 16 reaches its maximum radial outward displacement, and the radial support force applied by the sealing block 19 to the sealing airbag 13 reaches its maximum, so as to ensure that the airbag is stable in shape when subjected to subsequent detection air pressure. Subsequently, as the piston disc 24 continues to move due to the air circuit switching, the sliding sleeve 23 continues to move in a straight line. However, since the limiting block 2301 has entered the vertical groove 2102, its sliding in the vertical groove 2102 no longer drives the rotating rod 21 to rotate, which can ensure the stability of the sealing airbag 13 during the subsequent airtightness test of the metal barrel.

[0042] A method for detecting the seal of a follow-up metal barrel includes the following steps: Step 1: Guide the metal bucket to move onto the rotating plate 5 through the feeding channel; Step 2: Under the action of cylinder 8, control the sealing disc 9 to fit against the top of the metal barrel, and control the pump cylinder 11 to insert into the metal barrel; Step 3: Pump air into the pump cylinder 11. Under the action of air pressure, control the piston disc 24 to move, thereby inflating the sealing airbag 13 through the conduction switching mechanism. Under the action of the sealing airbag 13, the inner wall of the metal barrel is sealed. Step 4: The piston disc 24 drives the follow-up adjustment mechanism to move, and controls the sealing block 19 to open through the inner support mechanism, so as to guide the sealing airbag 13 to fit tightly against the inner wall of the metal barrel. When the sealing airbag 13 is fully inflated, the switching mechanism controls the gas in the pump cylinder 11 to be delivered to the metal barrel for airtightness testing.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A follow-up metal barrel sealing detection device, comprising: The machine base, and a rotating disk mounted on the machine base, with a fixed rod fixed on the rotating disk and a controller fixed to the end of the fixed rod; Its characteristic is that it further includes: A cylinder is fixed inside the controller. A sealing disc is fixed to the telescopic end of the cylinder. A pump cylinder is fixed on the sealing disc. A sealing air bag is fixed on the pump cylinder. A partition is fixed inside the pump cylinder. A switching mechanism is provided inside the pump cylinder. A piston disc is connected to the switching mechanism and is slidably sealed to the pump cylinder. The piston disc can move when the air pressure inside the pump cylinder changes, and the switching mechanism can adjust the connection state between the sealing airbag and the pump cylinder. An internal support mechanism is provided inside the pump cylinder. Multiple sealing blocks are connected to the internal support mechanism and are distributed equidistantly in a circular pattern. A follow-up adjustment mechanism is also provided inside the pump cylinder. The follow-up adjustment mechanism can adjust the distance between the sealing blocks through the internal support mechanism when the piston disc moves.

2. The follow-up metal barrel sealing detection device according to claim 1, characterized in that, The conduction switching mechanism includes a guide column fixed inside the pump cylinder and fixedly connected to the partition plate. The guide column is slidably and sealed to the piston disc. A second spring is sleeved on the guide column, and the two ends of the second spring abut against the pump cylinder and the piston disc, respectively. It also includes a sealing assembly and a conveying assembly disposed within the pump cylinder.

3. The follow-up metal barrel sealing detection device according to claim 2, characterized in that, The sealing assembly includes a first air inlet and a second air inlet formed on the outer circumference of the pump cylinder. A sealing ring is fixed on the piston disc, and an exhaust hole is formed on the outer circumference of the sealing ring, which is in communication with the first air inlet and the second air inlet.

4. The follow-up metal barrel sealing detection device according to claim 3, characterized in that, The delivery assembly includes a first air delivery pipe and a second air delivery pipe fixed to the outer circumference of the pump cylinder. The first air delivery pipe is connected to the first air delivery hole and the sealing airbag, and the second air delivery pipe is connected to the second air delivery hole.

5. The follow-up metal barrel sealing detection device according to claim 1, characterized in that, The internal support mechanism includes a support plate fixed inside the pump cylinder. The support plate has multiple circumferentially distributed sliding grooves, and sliding blocks are slidably installed in the sliding grooves.

6. The follow-up metal barrel sealing detection device according to claim 5, characterized in that, The internal support mechanism also includes a support sleeve fixed to the side wall of the sliding block. A support rod slides axially inside the support sleeve. The support rod is fixedly connected to the sealing block. A first spring that abuts against the support rod is fixed inside the support sleeve.

7. The follow-up metal barrel sealing detection device according to claim 6, characterized in that, The follow-up adjustment mechanism includes a rotating rod rotatably installed in the pump cylinder, a movable plate fixed at the end of the rotating rod, a plurality of inclined grooves evenly distributed in a circle formed on the movable plate, and a limiting post fixed on the sliding block that slides and engages with the inclined grooves.

8. The follow-up metal barrel sealing detection device according to claim 7, characterized in that, The follow-up adjustment mechanism further includes a spiral groove and a vertical groove formed on the outer circumference of the rotating rod. A sliding sleeve is fixed on the piston disc and sleeved on the rotating rod. A limiting block is fixed on the inner wall of the sliding sleeve and slides into the spiral groove and the vertical groove.

9. The follow-up metal barrel sealing detection device according to claim 1, characterized in that, The machine base is rotatably mounted with a first guide plate and a second guide plate, and a guide plate is fixed on the machine base. The guide plate, together with the first guide plate and the second guide plate, forms a feeding channel.

10. A method for detecting the seal of a follow-up metal barrel, comprising using the follow-up metal barrel seal detection equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Guide the metal bucket to move onto the rotating plate through the feeding channel; Step 2: Under the action of the cylinder, control the sealing disc to fit against the top of the metal barrel, and control the pump cylinder to insert into the metal barrel; Step 3: Pump air into the pump cylinder. Under the action of air pressure, control the piston disc to move, thereby inflating the sealing airbag through the conduction switching mechanism. Under the action of the sealing airbag, the inner wall of the metal barrel is sealed. Step 4: The piston disc drives the follow-up adjustment mechanism to move, and controls the sealing block to open through the internal support mechanism, so as to guide the sealing airbag to fit tightly against the inner wall of the metal barrel. When the sealing airbag is fully inflated, the switching mechanism controls the gas in the pump cylinder to be delivered to the metal barrel for airtightness testing.

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