Leak detection device and method for hoses

Abstract

This invention discloses a leak detection device for hoses, including a driving device, a clamping assembly capable of being driven by the driving device to move in opposite directions, a sensing device, and a control unit connected to the sensing device. The clamping assembly moves from an initial position to a clamping position abutting against the end of the hose. The sensing device is arranged to detect the position of the clamping assembly. The control unit determines whether the distance between the clamping assemblies reaches a predetermined range based on the input from the sensor device. When the distance between the clamping assemblies reaches the predetermined range, the control unit controls the issuance of an alert signal, indicating that the product has passed the inspection.

Description

Technical Field

[0001] This invention relates to a device and method for detecting leaks in sealed packaging containers, such as flexible containers like hoses. Background Technology

[0002] In the packaging industry, online burst testing is required for containers or seals in sealed packaging that contain perishable products such as cosmetics, chemicals or pharmaceuticals, toothpaste, food, or similar items. It is known to extend and protect the shelf life of products by filling the remaining free space with gas after the product has been filled.

[0003] Leaks in the packaging due to manufacturing errors or subsequent damage will result in at least partial loss of the gas and may shorten the expected shelf life. Another drawback of leaks is that the product may escape from the packaging and contaminate the surrounding environment, leading to consumer complaints.

[0004] The existing leak detection device is equipped with a pair of sealing pressure devices to first position the seal of the hose, and then a pair of pipe pressure devices to apply a predetermined pressure to the hose. A sensing device is used to measure the pressure signal in the hose when the pipe pressure device applies the predetermined pressure to the hose. The control unit determines whether a pressure change has occurred in the hose based on the input from the sensor device, thereby determining whether there is a leak in the seal.

[0005] The existing leak detection device applies a predetermined pressure to the hose through a pair of pipe pressure devices. The hose corresponding to the part of the hose to which the predetermined pressure is applied contains not only gas but also perishable products. If there is a leak in the seal, the perishable products in the hose can be squeezed out from the leak in the seal.

[0006] Therefore, in view of the current situation, the present invention has made improvements. The improved leak detection can effectively prevent the material inside the hose from escaping, and the hose will not be creased due to compression, thus affecting its appearance. Summary of the Invention

[0007] The object of this invention is to provide an improved device for leak detection of hoses. Another object is to provide an improved method for leak detection.

[0008] The solution to the problem according to the invention is defined by the features of the independent claims relating to the leak detection device for hoses and the method for detecting leaks in hoses. The other claims contain advantageous further developments of the leak detection device and the method for detecting leaks.

[0009] The solution to the problem of the present invention is achieved as follows: a leak detection device for a hose includes a drive device, clamping components capable of being driven by the drive device to move in opposite directions, a sensing device, and a control unit connected to the sensing device. The clamping components move from an initial position to a clamping position abutting against the end of the hose. The sensing device is arranged to detect the position of the clamping components. The control unit determines whether the distance between the clamping components reaches a predetermined range based on input from the sensor device. When the distance between the clamping components reaches the predetermined range, the control unit controls the issuance of an alert signal.

[0010] Because of the above technical solution, the leakage detection device of the present invention will not cause material inside the pipe to escape from the leaking part of the seal when it detects a defective product with a leaking seal; thus avoiding pollution of the surrounding environment or consumer complaints.

[0011] Preferably, the clamping assembly includes a first clamping member and a second clamping member, the driving device includes a first driving member and a second driving member, the first clamping member is driven by the first driving member, the second clamping member is driven by the second driving member, and the control unit controls the first clamping member and the second clamping member to move synchronously in opposite directions.

[0012] Preferably, the sensing device includes a first sensing element connected to the first driving member and a second sensing element for sensing the position of the first sensing element; the position of the second sensing element is adjustable, and when the first sensing element is driven by the first driving member to a position where it can generate a sensing signal with the second sensing element, the control unit determines, based on the input from the sensor device, that the distance between the first clamping member and the second clamping member has reached a predetermined range, and the control unit controls the issuance of a reminder signal.

[0013] Preferably, the first clamping member and the second clamping member are respectively provided with contact surfaces opposite to the hose, the contact surfaces including ramp surfaces, the ramp surfaces being used to abut against the tail of the hose.

[0014] Thanks to the above technical solution, the hose will not develop creases due to compression during the leak detection process, thus affecting its appearance.

[0015] Preferably, the alert signal is at least one of sound, light, and electricity.

[0016] Preferably, the drive device is configured as a cylinder, and the cylinder is equipped with a throttle valve for operablely adjusting the movement speed of the cylinder piston so that the movement of the clamping device is synchronized.

[0017] Furthermore, it also includes a fine-tuning mechanism coupled to the drive device for operably adjusting the minimum distance between the first clamping member and the second clamping member when they move toward each other to abut against the end of the hose.

[0018] Preferably, the fine-tuning device includes a screw, a nut engaged with the screw, and a handwheel connected to the screw for operation. The handwheel is provided with a reading. The drive device is provided with a mounting plate, and the screw is connected to the mounting plate.

[0019] Thanks to the above technical solution, the hose leakage detection device has a simpler structure and is more efficient in detection compared to existing technologies.

[0020] Another solution to the problem of the present invention is achieved as follows: a method for detecting leaks in a hose using a leak detection device, wherein the leak detection device includes a drive device, a clamping assembly capable of being driven by the drive device to move in opposite directions, a sensing device, and a control unit connected to the sensing device; wherein the method includes the following steps: Position the hose tail between the clamping components; drive the clamping components from their initial positions to move towards each other until they abut against the hose tail; a sensor detects the position of the clamping components; the control unit determines whether the distance between the clamping components reaches a predetermined range based on input from the sensor; when the distance between the clamping components reaches the predetermined range, the control unit issues a warning signal.

[0021] The leakage detection method of the present invention will not cause material inside the pipe to escape from the leaking part of the seal when a defective product with a leaking seal is detected; thus avoiding pollution of the surrounding environment or consumer complaints.

[0022] Preferably, the clamping assembly includes a first clamping member and a second clamping member, the first clamping member and the second clamping member respectively having a contact surface opposite to the hose, the contact surface including a ramp surface; the method includes the following steps: controlling the distance between the bottom end of the ramp surface and the surface of the material inside the hose between -5mm and 7mm.

[0023] Preferably, the clamping assembly includes a first clamping member and a second clamping member, the driving device includes a first cylinder and a second cylinder, the first clamping member is connected to the piston of the first cylinder, the second clamping member is connected to the piston of the second cylinder, the sensing device includes a first sensing element connected to the first driving member, and a second sensing element for sensing the position of the first sensing element. When the first sensing element is driven by the first driving member to a position that generates a sensing signal with the second sensing element, the control unit controls the issuance of an alert signal. The method further includes the following steps: after positioning the end of the hose between the clamping assemblies, before the driving device drives the clamping assemblies to move towards each other, adjusting the second sensing element to a predetermined position and fixing it.

[0024] Preferably, the leakage detection device includes a fine-tuning mechanism coupled to the drive device, and the method further includes the following steps: before the drive device drives the clamping components to move toward each other, the fine-tuning mechanism is operated to adjust or set the minimum distance between the clamping components when they move toward each other to approach each other.

[0025] Preferably, the driving device is configured as a cylinder, the cylinder is provided with an airflow valve, and the method further includes the following steps: before the driving device drives the clamping components to move in opposite directions, the airflow valve is operated to adjust the movement speed of the cylinder piston so that the clamping components move synchronously.

[0026] Preferably, the leakage detection device also includes a pressure reducing valve, and the method further includes the following steps: before the cylinder drives the clamping assembly to move in opposite directions, the pressure reducing valve is used to adjust the pressure value to match the cylinder.

[0027] Preferably, the sensing device includes a signal light disposed on the second sensing element, and the method further includes the following steps: the sensing device detects the position of the clamping assembly, the control unit determines whether the distance between the clamping assemblies reaches a predetermined range based on the input from the sensor device, and the control unit controls the signal light of the second sensing element to light up.

[0028] The above-mentioned technical solution makes the hose leakage detection method simpler to operate and more efficient than existing technologies. Attached Figure Description

[0029] Figure 1 This is a perspective view of a toothpaste filling device according to one embodiment.

[0030] Figure 2 for Figure 1 An exploded 3D diagram of the leak detection device.

[0031] Figure 3 for Figure 1 A cross-sectional schematic diagram of a leak detection device.

[0032] Figure 4 for Figure 3 A schematic diagram of the operation of the sensing device.

[0033] Figure 5 This is a perspective view of a clamping member according to one embodiment.

[0034] Figure 6 This is a three-dimensional schematic diagram of a toothpaste product according to one embodiment.

[0035] Figure 7 This is a front view schematic diagram of a leakage detection device in operation according to an embodiment.

[0036] Figure 8 yes Figure 7 A schematic diagram of the leakage detection device in another working state from the front view.

[0037] The attached icons are numbered as follows: 1. Bracket; 10. Bearing; 100. Toothpaste filling machine; 108. Human-machine interface; 110. Leak detection device; 109. Frame; 11. Nut; 12. Handwheel; 13. Magnetic field lines; 14. Magnetic ring; 15. Pressure reducing valve; 2. Bracket; 20. Toothpaste; 20a. Main body section; 20b. Hose tail; 21. Sealing section; 22. Gas section; 3. Reinforcing rib; Gas section; 4. Mounting plate; 4a. Threaded hole; 5. Bearing seat; 6. Screw; 7. Clamping plate; 7a. Straight plane; 7b. First arc surface; 7c. Sloping surface; 7d. Second arc surface; 8. Cylinder; 8a. Piston; 9. Throttling valve. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The described embodiments are only some of the embodiments of the present invention, and not all of them.

[0039] Reference Figure 1 The image shows a toothpaste filling machine 100 according to an embodiment of the present invention, including a frame and a leakage detection device 110 mounted on the frame 109. Typically, the toothpaste filling machine 100 can fill toothpaste products of different specifications. Since the dimensions or heights of different toothpaste products vary, the height needs to be adjusted accordingly before filling. The toothpaste filling machine 100 has different workflows and working modes, including filling, sealing, and leakage detection. The toothpaste filling machine 100 is equipped with a human-machine interface 108 for selecting or switching working modes and workflows adapted to the products to be filled. Figure 1 The leakage detection device 110 of the toothpaste filling machine 100 shown is used to detect the tail seal of the toothpaste product after the toothpaste has been filled and sealed in the tube.

[0040] Reference Figure 2 and Figure 3As shown, the leakage detection device 110 is equipped with a support mechanism, including a horizontally placed bracket 2 and a vertically placed bracket 1. A pair of reinforcing ribs 3 securely connect the bracket 2 and the bracket 1. A drive device is located below the support mechanism and includes a plurality of cylinders 8. In this embodiment, the four cylinders 8 are arranged in pairs facing each other. Two cylinders 8 on the same side are connected by a mounting plate 4 located above the cylinders. The mounting plate 4 is inverted T-shaped, and the vertical portion of the inverted T-shaped mounting plate 4 has threaded holes 4a. The clamping assembly is driven by the drive device to perform linear motion. In this embodiment, the clamping assembly includes a plurality of clamping elements 7, the number of which corresponds one-to-one with the cylinders 8. Each clamping element 7 is driven by a corresponding cylinder 8. Two opposing cylinders 8 form a group, used to drive a pair of clamping elements 7 to move synchronously in opposite directions.

[0041] In this embodiment, the two pairs of clamping members 7 are driven by corresponding cylinders 8 to move synchronously in opposite directions or in opposite directions. That is, the first clamping member is driven by the first cylinder, the second clamping member is driven by the second cylinder, and so on, with the third clamping member driven by the third cylinder and the fourth clamping member driven by the fourth cylinder. It is conceivable that if the toothpaste filling machine 100 has more workstations, more sets of cylinders 8 and corresponding clamping members 7 can be set, which is beneficial to improving production efficiency. Each mounting plate 4 is connected to two cylinders 8 located on the same side. The distance between the two mounting plates 4 is preset. One mounting plate 4 is provided with a fine-tuning mechanism, while the cylinder mounting plate 4 on the other side is fastened to the bracket 2. The fine-tuning mechanism includes a screw 6, a bearing 10 for supporting the screw 6, a bearing seat 5 for supporting the bearing 10, a nut 10 set on the screw 6, and a handwheel 12 connected to the screw 6 for operation. The handwheel 12 is provided with a reading. The screw 6 is respectively connected to the threaded hole 4a of the mounting plate 4. Using one set of cylinders 8 without a fine-tuning mechanism as a reference, another set of cylinders 8 with a fine-tuning mechanism is driven by the mounting plate 4 to move slightly relative to it, thereby changing the distance between the two sets of cylinders 8, and thus changing the distance between the relatively positioned clamping parts 7. Since the screw 6 and the mounting plate 4 are connected by a threaded engagement, one rotation of the handle 12 changes the distance by the width of one thread. Therefore, the fine-tuning mechanism is mainly used to adjust the minimum distance between the clamping parts 7 when testing toothpaste products of different specifications. Specifically, before operating the handwheel 12, loosen the fasteners between the mounting plate 4 and the bracket 2, then rotate the handwheel 12 to rotate the screw 6 relative to the threaded hole 4a. The mounting plate 4 moves slightly relative to the bracket 2. Since the handwheel 12 has a reading, turning to the corresponding reading position indicates that the corresponding displacement has been performed.

[0042] The handwheel 12 is used to operably adjust the minimum distance between the clamping members 7 when they move towards each other and come close to each other. In one embodiment, a toothpaste tube that has been filled but not sealed is placed below the workstation, and the clamping distance is adjusted so that the end of the tube is pressed down but the material inside the tube does not overflow, which is considered to be the appropriate distance.

[0043] The cylinder 8 is equipped with a throttle valve 9, which is used to operably adjust the airflow in the cylinder 8, thereby adjusting the movement speed of the piston so that the relative clamping parts 7 in the clamping device move synchronously and clamp the toothpaste synchronously.

[0044] The leakage detection device has a sensing device and a control unit connected to the sensing device. The sensing device is arranged to detect the position of the clamping components. The control unit determines whether the distance between the clamping components reaches a predetermined range based on the input from the sensing device. When the distance between the clamping components reaches the predetermined range, the control unit controls the issuance of an alert signal.

[0045] Reference Figure 3 , Figure 4As shown, the sensing device includes a first sensing element disposed on the piston 8a of the cylinder 8, and a second sensing element for sensing the position of the first sensing element to generate sensing information. In this embodiment, the first sensing element is constructed as a magnetic ring 14 fixedly connected to the piston 8a, and the second sensing element is constructed as magnetic field lines 13. When the piston 8a is in the initial position, the magnetic ring 14 is in the initial positions p0 and q0 respectively, with an initial distance L between them. Correspondingly, a pair of clamping members 7 are in the initial positions respectively. Driven by the cylinder piston 8a, the clamping members 7 move towards each other from their initial positions in the directions shown by arrows N and M in the figure. The magnetic ring 14 is driven by the piston 8a to move closer to the magnetic field lines 13. When the piston 8a moves to the predetermined positions p1 and q1, the magnetic field lines 13 and the magnetic ring 14 generate a sensing signal. At this time, the magnetic ring 14 moves a distance of L1. Since the magnetic ring 14 has a certain thickness, the detection range of the sensing device is between 0-3mm. In one embodiment, a signal light (not shown) is provided on the second sensing element. When the magnetic field line 13 senses the magnetic ring 14 and generates a sensing signal, the control unit (not shown) controls the signal light to illuminate based on the sensing signal. The illuminated signal light indicates that the toothpaste product being tested is well-sealed. If the signal light flashes and then goes out, it indicates that the toothpaste product has burst and is a defective product. At this time, the position of the magnetic ring 14 has exceeded the sensing range of the magnetic field line 13, that is, the magnetic ring 14 has moved a further distance L2, and the distance between the magnetic rings 14 also tends to the preset minimum distance L3. At this time, the distance between the contact surfaces of the relatively positioned clamping members 7 is the minimum distance. This minimum distance is preset according to the toothpaste 20 specification, and the allowable tolerance range for the setting of the minimum distance is 1-3mm. In one embodiment, the sensing device detects the position of the clamping components, and the control unit determines whether the distance between the clamping components has reached a predetermined range based on the input from the sensor device. When the distance between the clamping components reaches the predetermined range, the control unit controls the issuance of a reminder signal.

[0046] Reference Figure 5 As shown, in one embodiment, the clamping member 7 is provided with a contact surface for clamping the toothpaste 20 tube. The contact surface includes a ramp surface 7c, and a first arc surface 7b and a second arc surface 7d connected to the ramp surface 7c. The first arc surface 7b and the second arc surface 7d are essentially transition surfaces between the ramp surface 7c and the straight plane, so the extension distance of the transition surface does not need to be too large. A straight plane 7a is provided on the contact surface along the vertical direction of the tube. The first arc surface 7b is located between the straight plane 7a and the ramp surface 7c, and the second arc surface 7d is located at the bottom of the ramp surface 7c along the vertical direction of the tube.

[0047] Reference Figure 6As shown, one embodiment of toothpaste 20 includes a tube body section 20a encapsulating toothpaste paste, and a tube tail section 20b, wherein the tube tail section 20b is used to abut against a ramp surface 7c; the tube also has a sealing section 21. The lower part of the sealing section 21 is a gas section 22, the height h1 of which is related to the density of the toothpaste paste, varying for different densities. The height h1 of the gas section 22 is approximately between 20 mm and 35 mm. The first arc surface 7b and the ramp surface 7c are used to abut against the gas section 22, while the straight plane 7a is directly opposite the sealing section 21 of the tube, normally without contact.

[0048] Further reference Figure 7 As shown, the leakage detection device 110 is equipped with a pressure reducing valve 15 connected to the cylinder 8. The pressure reducing valve 15 is used to set the air pressure value adapted to the cylinder 8. In this embodiment, the air pressure value set by the pressure reducing valve 15 is 0.2 MPa. For different specifications of toothpaste products, as long as the above air pressure value remains constant, it is not necessary to readjust the pressure reducing valve 15. When the detection device starts the detection work, the toothpaste 20 needs to be positioned so that the end of the tube 20b is positioned between the clamping members 7. The height setting of the clamping members 7 is such that the bottom end of the second arc surface 7d is usually above the toothpaste paste. The distance h2 between the bottom end of the ramp surface 7c and the surface of the paste / material inside the toothpaste tube ranges from -5mm to 7mm. This means that the bottom end of the ramp surface 7c can be 7mm higher than the surface of the toothpaste paste or 5mm lower than the surface of the toothpaste paste. If h2 is too large, the squeezing degree is limited and cannot effectively achieve the detection effect; if the distance h2 is too small, the product will be squeezed out, causing contamination. This configuration ensures that when the clamping members 7 move towards each other under the drive of the cylinder piston 8a, most of the contact force applied by the clamping members 7 is applied to the gas section 22 when the contact surface of the clamping members 7 abuts against the tail of the toothpaste tube. The ramp surface 7c is designed to wedge with the inclined surface shape of the tail of the toothpaste tube, and the first arc surface 7b and the second arc surface 7d are located at the two ends of the ramp surface 7c, so that there are no creases on the toothpaste tube and the appearance of normal toothpaste under leakage detection is not affected.

[0049] Further reference Figure 8As shown, the clamping assembly is driven by the drive device to move from its initial position towards each other until it comes into contact with the end of the hose 20b. The ramp surface 7c of the clamping member 7 first contacts the gas section 22 of the end of the hose 20b. At this time, the sealing section 21 is located between the straight planes 7a of the clamping member 7, but not in contact with the straight planes 7a. As the piston 8a is further driven, the clamping member 7 is further displaced, so that the first arc surface 7b, the ramp surface 7c, and the second arc surface 7d of the contact surface begin to abut against the gas section 22. The gas section 22 will undergo a certain deformation due to gas pressure. At this time, the sealing section 21 is still located between the straight planes 7a of the pair of clamping members 7, and is not in contact with the straight planes 7a. If there is a risk of poor hose sealing or leakage, the clamping members 7 will further displace towards each other and squeeze the gas section 22. The sealing section 21 will come into contact with the straight plane 7a, and the toothpaste 20 will burst.

[0050] In one embodiment, the position of the second sensing element relative to the cylinder 8 is adjustable. Specifically, after the hose tail 20b is positioned between the clamping components, and before the driving device drives the clamping components to move towards each other, the magnetic field line 13 is adjusted to a predetermined position and fixed. When the magnetic ring is driven by the piston 9a to the position where the magnetic field line 13 generates a sensing signal, the indicator light illuminates and remains on for several seconds, indicating that the toothpaste product has passed inspection. If the indicator light flashes briefly and then goes out, the product is considered unqualified.

[0051] In other alternative embodiments, the control unit controls the issued reminder signal, which may be at least one of sound, light, or electrical signals; it may be a signal to remind staff or a feedback signal to the system, thereby controlling the subsequent rejection of the non-conforming product.

[0052] In summary, the present invention has a simple overall structure, is easy to implement and operate, is highly practical and specialized, and has low manufacturing costs. Further technological improvements do not require significant additional costs, making the present invention inherently valuable for market promotion. It is expected to be very popular and effectively disseminated.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural or procedural changes made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A leak detection device for a hose, comprising a drive unit, a clamping assembly capable of being driven by the drive unit to move in opposite directions, a sensing device, and a control unit connected to the sensing device, characterized in that: The clamping assembly moves from its initial position to a clamping position abutting against the end of the hose. The sensing device is arranged to detect the position of the clamping assembly. The control unit determines whether the distance between the clamping assemblies reaches a predetermined range based on the input from the sensor device. When the distance between the clamping assemblies reaches the predetermined range, the control unit controls the issuance of an alert signal.

2. The leakage detection device according to claim 1, characterized in that: The clamping assembly includes a first clamping member and a second clamping member, and the driving device includes a first driving member and a second driving member. The first clamping member is driven by the first driving member, and the second clamping member is driven by the second driving member. The control unit controls the first clamping member and the second clamping member to move synchronously in opposite directions.

3. The leakage detection device according to claim 2, characterized in that: The sensing device includes a first sensing element connected to a first driving member and a second sensing element for sensing the position of the first sensing element. The position of the second sensing element is adjustable. When the first sensing element is driven by the first driving member to a position where it can generate a sensing signal with the second sensing element, the control unit determines, based on the input from the sensor device, that the distance between the first clamping member and the second clamping member has reached a predetermined range, and the control unit controls the issuance of an alert signal.

4. The leakage detection device according to claim 2, characterized in that: The first clamping member and the second clamping member are respectively provided with contact surfaces opposite to the hose, the contact surfaces including ramp surfaces, the ramp surfaces being used to abut against the tail of the hose.

5. The leakage detection device according to claim 2, characterized in that: It also includes a fine-tuning mechanism coupled to the drive unit for operablely adjusting the minimum distance between the first clamp and the second clamp when they move toward each other to abut against the end of the hose.

6. A method for detecting leaks in a hose using a leak detection device, wherein, The leak detection device includes a drive unit, a clamping assembly capable of being driven by the drive unit to move in opposite directions, a sensing device, and a control unit connected to the sensing device; wherein the method includes the following steps: Position the hose tail between the clamping components; drive the clamping components from their initial positions to move towards each other until they abut against the hose tail; a sensor detects the position of the clamping components; the control unit determines whether the distance between the clamping components reaches a predetermined range based on input from the sensor; when the distance between the clamping components reaches the predetermined range, the control unit issues a warning signal.

7. The method according to claim 6, wherein the clamping assembly includes a first clamping member and a second clamping member, the first clamping member and the second clamping member are respectively provided with a contact surface opposite to the hose, the contact surface including a ramp surface; the method includes the following steps: controlling the distance between the bottom end of the ramp surface and the surface of the material inside the hose between -5mm and 7mm.

8. The method according to claim 6, wherein, The clamping assembly includes a first clamping member and a second clamping member. The driving device includes a first driving member and a second driving member. The first clamping member is connected to the first driving member, and the second clamping member is connected to the second driving member. The sensing device includes a first sensing element connected to the first driving member and a second sensing element for sensing the position of the first sensing element. When the first sensing element is driven by the first driving member to a position that generates a sensing signal with the second sensing element, the control unit controls the issuance of an alert signal. The method further includes the following steps: after positioning the end of the hose between the first clamping member and the second clamping member, before the driving device drives the first clamping member and the second clamping member to move towards each other, the second sensing element is adjusted to a predetermined position and fixed.

9. The method according to claim 6, wherein, The leakage detection device includes a fine-tuning mechanism that is coupled to the drive device, and the method further includes the following steps: before the drive device drives the clamping components to move toward each other, the fine-tuning mechanism is used to adjust or set the minimum distance between the clamping components when they move toward each other to get close to each other.

10. The method according to claim 6, wherein, The driving device is configured as a cylinder, and the cylinder is equipped with an airflow valve. The method further includes the following steps: before the driving device drives the clamping components to move in opposite directions, the airflow valve is operated to adjust the movement speed of the cylinder piston so that the clamping components move synchronously.

11. The method according to claim 10, wherein, The leakage detection device also includes a pressure reducing valve, and the method further includes the following steps: before the cylinder drives the clamping assembly to move in opposite directions, the pressure reducing valve is used to adjust the pressure value to match the cylinder.

12. The method according to claim 8, wherein, The sensing device includes a signal light disposed on the second sensing element, and the method further includes the following steps: the sensing device detects the position of the clamping assembly, the control unit determines whether the distance between the clamping assemblies reaches a predetermined range based on the input from the sensor device, and the control unit controls the signal light of the second sensing element to light up.

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