Leak detection device

Abstract

The utility model relates to the technical field of leakage detection equipment, and provides a leakage detection device which comprises a windshield, a detection tube and a first elastic reset piece, a detection cavity with an opening is formed in the windshield, the detection tube is movably connected to the windshield in the depth direction of the detection cavity, and part of the detection tube is located in the detection cavity. A sampling opening is formed in the part, located in the detection cavity, of the detection tube; one end of the first elastic reset piece is connected to the detection pipe, and the other opposite end of the first elastic reset piece is fixedly arranged relative to the windshield; the leak detection device provided by the embodiment of the utility model can be directly used for covering detection, and the leak detection efficiency is effectively improved, so that the leak detection device can meet the production takt of an automatic production line when being used for the automatic production line.

Description

Technical Field

[0001] The present application relates to the technical field of leak detection equipment, and in particular provides a leak detection device. Background Art

[0002] The main parts of cylinder leakage are concentrated in the connection between the angle valve and the cylinder valve seat. Traditional detection methods usually rely on manual spraying of soapy water and visual inspection of bubbles. This is not only time-consuming and inefficient, but also when the leakage volume is small, it takes a long time to see the bubbles generated. This poses a risk of missed detection, especially on automatic filling production lines. Manual operation cannot keep up with the production speed, which can easily lead to production line shutdowns. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a leak detection device, aiming to solve the problem of low efficiency of traditional leak detection methods.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0005] An embodiment of the present application provides a leak detection device, including a wind shield, a detection tube and a first elastic reset member. A detection cavity with an opening is formed inside the wind shield. The detection tube is movably connected to the wind shield along the depth direction of the detection cavity. Part of the detection tube is located in the detection cavity, and a sampling port is provided in the part of the detection tube located in the detection cavity; one end of the first elastic reset member is connected to the detection tube, and the other end of the first elastic reset member is fixed relative to the wind shield.

[0006] Beneficial effects of the embodiments of the present application: The leak detection device provided by the embodiments of the present application utilizes a windshield to cover the part to be detected of the object to be detected, the detection tube can be extended into the detection cavity of the windshield, and the sampling port opened on the detection tube is used to sample the gas in the detection cavity to facilitate the detection of whether there is a leak; at the same time, a first elastic reset part is also provided on the detection tube, so that when performing a leak detection operation, the windshield can be directly covered, and the detection tube can be moved relative to the windshield in the event of interference and cause the first elastic reset part to undergo elastic deformation to reduce the probability of interference between the detection tube and the object to be detected affecting the detection; at the same time, after the detection is completed and the windshield is removed, the detection tube can be moved back to its original position under the action of the elastic restoration of the first elastic reset part, so as to facilitate the subsequent use of the leak detection device; the leak detection device of the embodiment of the present application can be directly covered for detection, which effectively improves the leak detection efficiency, so that the leak detection device can meet the production rhythm of the production line when used in an automatic production line.

[0007] In some embodiments, a guide bearing is provided on the wind shield, and the guide bearing is connected to the detection tube; the first elastic reset member is connected to the fixed part of the guide bearing.

[0008] In some embodiments, a plurality of guide bearings arranged in a ring are provided on the wind shield, and the plurality of guide bearings are respectively connected to detection tubes.

[0009] In some embodiments, a buffer structure is provided at the end of the detection tube.

[0010] In some embodiments, the detection tube includes a connecting tube section and an end tube section located in the detection cavity and connected to each other, and the extension direction of the connecting tube section intersects with the extension direction of the end tube section; the sampling port is opened on the connecting tube section and / or the end tube section.

[0011] In some embodiments, the leak detection device also includes a hanger with a hollow structure, which is arranged on the wind shield. The hanger is provided with a first connector and a second connector connected to the hollow structure. The first connector is connected to the detection tube through a hose structure, and the second connector is used to connect the detection equipment.

[0012] In some embodiments, the boom is rotatably disposed on the windshield, and a second elastic reset member is further disposed between the boom and the windshield. The second elastic reset member is configured to elastically deform when the boom rotates relative to the windshield.

[0013] In some embodiments, the second elastic return member is a return spring, two mounting columns are fixedly provided on the wind shield, and the opposite ends of the return spring are connected to the two mounting columns; a hanging rod is fixedly provided on the suspension rod, and the hanging rod is connected to the middle part of the return spring.

[0014] In some embodiments, the wind shield is also provided with an air blowing nozzle facing the detection chamber, and the leak detection device also includes a multi-way valve, the first valve port of the multi-way valve is connected to the second connector, the second valve port of the multi-way valve is connected to the detection equipment, the third valve port of the multi-way valve is used to connect the blowing mechanism, and the fourth valve port of the multi-way valve is connected to the air blowing nozzle.

[0015] In some embodiments, the leak detection device further includes a lifting mechanism, and an output end of the lifting mechanism is connected to the suspension rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a leak detection device provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 A local enlarged schematic diagram of point A;

[0019] Figure 3 A schematic structural diagram of a leak detection device provided in an embodiment of the present application from another perspective;

[0020] Figure 4 An internal cross-sectional view of a leak detection device provided in an embodiment of the present application;

[0021] Figure 5 A schematic structural diagram of another leak detection device provided in an embodiment of the present application;

[0022] Figure 6 This is an internal cross-sectional view of another leak detection device provided in an embodiment of the present application.

[0023] Among them, the reference numerals in the figures are:

[0024] 1000. Leak detection device;

[0025] 100, windshield; 101, detection chamber; 110, guide bearing; 120, mounting column; 130, air blowing nozzle;

[0026] 200, detection tube; 201, sampling port; 210, connecting pipe section; 220, terminal pipe section;

[0027] 300, first elastic return member; 500, second elastic return member;

[0028] 400, suspension rod; 410, first connector; 420, second connector; 430, hanging rod;

[0029] 600, multi-way valve; 610, first valve port; 620, second valve port; 630, third valve port; 640, fourth valve port; 700, lifting mechanism;

[0030] D. Depth direction. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0035] Liquefied petroleum gas (LPG) is a clean and efficient energy source, currently used as fuel by nearly 200 million people in China. However, safety accidents caused by LPG leaks remain numerous each year, with cylinder leaks primarily occurring at the connection between the angle valve and the cylinder valve seat. Traditional detection methods typically rely on manual application of soapy water and visual inspection for bubbles, which is time-consuming and inefficient. Even with small leaks, it can take a long time to detect bubbles, creating the risk of missed detections. This is especially true on automated filling lines, where manual operation cannot keep up with production speeds, easily leading to production line downtime.

[0036] Based on the above considerations, in order to solve the problem of low efficiency of traditional leak detection methods, a leak detection device is designed, which uses a wind shield to cover the part to be detected of the object to be detected, and the detection tube can be extended into the detection cavity of the wind shield, and the sampling port opened on the detection tube is used to sample the gas in the detection cavity to detect whether there is a leak; at the same time, a first elastic reset part is also provided on the detection tube, so that when performing a leak detection operation, the wind shield can be directly covered, and the detection tube can move relative to the wind shield in the event of interference and cause the first elastic reset part to undergo elastic deformation to reduce the probability of interference between the detection tube and the object to be detected affecting the detection; at the same time, after the detection is completed and the wind shield is removed, the detection tube can be moved back to its original position under the elastic restoration action of the first elastic reset part, so as to facilitate the subsequent use of the leak detection device.

[0037] Below, a detailed introduction will be given by taking the leak detection device provided in an embodiment of the present application as an example of using it to detect the connection between the angle valve and the cylinder valve seat of a liquefied gas cylinder.

[0038] Please refer to Figures 1 to 6 The embodiment of the present application provides a leak detection device 1000, including a wind shield 100, a detection tube 200 and a first elastic reset member 300. A detection cavity 101 with an opening is formed inside the wind shield 100. The detection tube 200 is movably connected to the wind shield 100 along the depth direction D of the detection cavity 101. Part of the detection tube 200 is located in the detection cavity 101, and a sampling port 201 is provided on the part of the detection tube 200 located in the detection cavity 101; one end of the first elastic reset member 300 is connected to the detection tube 200, and the other end of the first elastic reset member 300 is fixed relative to the wind shield 100.

[0039] The wind shield 100 is used to cover the connection between the angle valve and the valve seat of the liquefied gas cylinder, so that the connection between the angle valve and the valve seat of the liquefied gas cylinder extends into the detection cavity 101 of the wind shield 100. If the liquefied gas cylinder leaks, the leaked liquefied gas will diffuse within the detection cavity 101; therefore, the wind shield 100 can effectively reduce the impact of the surrounding air on leak detection, and the leaked gas can be dispersed only in a specific area, allowing the detection tube 200 to sample and detect the internal air containing the leaked gas through the sampling port 201.

[0040] Optionally, in some embodiments, the wind shield 100 may be a cylindrical structure, and an opening is formed at one end of the cylindrical structure in the axial direction; when in use, the wind shield 100 is mounted on the liquefied gas cylinder through the opening.

[0041] The detection tube 200 is movably connected to the wind shield 100 along the depth direction D of the detection cavity 101. Therefore, when the wind shield 100 is placed over a liquefied gas cylinder, if the cylinder's angle valve is located in the movement path of the detection tube 200, the detection tube 200 will abut the cylinder's angle valve. Furthermore, as the wind shield 100 continues to move toward the liquefied gas cylinder, the detection tube 200 remains stationary relative to the cylinder and moves relative to the wind shield 100 and along the depth direction D of the detection cavity 101. Therefore, the detection tube 200 does not affect the movement of the wind shield 100 when placed over the liquefied gas cylinder.

[0042] The number of detection tubes 200 can be one, two, or more; the detection tube 200 is provided with a sampling port 201, optionally, the number of sampling ports 201 can be one, two, or any number of the above; the sampling port 201 can be located at any location of the portion of the detection tube 200 located within the windshield 100. It should be understood that the detection tube 200 is used to connect to external detection equipment, which can obtain gas within the detection chamber 101 through the sampling port 201 of the detection tube 200, thereby analyzing the gas and determining whether it contains leaked gas. Alternatively, the gas detection probe used for detection can also be directly installed on the detection tube 200 to directly detect the sampled gas.

[0043] The first elastic reset member 300 is used to act on the detection tube 200 so that when the detection tube 200 is subjected to external force and moves relative to the wind shield 100, when the external force disappears, the first elastic reset member 300 can drive the detection tube 200 back to its original position for subsequent use.

[0044] Optionally, the first elastic return member 300 may be an elastic structure such as a tension spring or a compression spring.

[0045] It should be understood that in some embodiments, the leak detection device can be used to detect the liquefied gas cylinder from top to bottom in the direction of gravity, such as Figures 1 to 4 Alternatively, in other embodiments, the leak detection device can also be used to perform horizontal cover detection in the horizontal direction, such as Figure 5 and Figure 6 shown.

[0046] The leak detection device 1000 provided in the embodiment of the present application utilizes a wind shield 100 to cover the part to be detected of the object to be detected, and the detection tube 200 can be extended into the detection cavity 101 of the wind shield 100, and the sampling port 201 provided on the detection tube 200 is used to sample the gas in the detection cavity 101 to facilitate the detection of whether there is a leak; at the same time, a first elastic reset member 300 is also provided on the detection tube 200, so that when performing a leak detection operation, the wind shield 100 can be directly covered, and the detection tube 200 can be relatively moved relative to the wind shield 101 in the event of interference. 00 moves and causes the first elastic reset member 300 to undergo elastic deformation, so as to reduce the probability of interference between the detection tube 200 and the object to be detected affecting the detection; at the same time, after the detection is completed and the wind shield 100 is removed, the detection tube 200 can be moved back to its original position under the elastic restoration action of the first elastic reset member 300, so as to facilitate the subsequent use of the leak detection device 1000; the leak detection device 1000 of the embodiment of the present application can be directly used for cover detection, which effectively improves the leak detection efficiency, so that the leak detection device 1000 can meet the production rhythm of the production line when used in an automatic production line.

[0047] Please refer to Figures 1 to 4 In some embodiments, a guide bearing 110 is provided on the wind shield 100 , and the guide bearing 110 is connected to the detection tube 200 ; the first elastic reset member 300 is connected to the fixed part of the guide bearing 110 .

[0048] The guide bearing 110 is used to guide the movement of the detection tube 200 to ensure its smooth movement along the depth direction D of the detection cavity 101 .

[0049] One or more guide bearings 110 can be fixedly mounted on the wind shield 100; the guide bearing 110 can be arranged in the detection cavity 101, or the guide bearing 110 can be arranged outside the detection cavity 101, or the guide bearing 110 can pass through the wind shield 100 and be partially located in the detection cavity 101 and the other part is located outside the detection cavity 101.

[0050] The first elastic return member 300 is connected to the fixed part of the guide bearing 110. Thus, when the detection tube 200 moves under the guiding action of the guide bearing 110, the first elastic return member 300 will undergo elastic deformation; when the detection tube 200 loses the action of external force, the first elastic return member 300 can drive the detection tube 200 to move back to its original position.

[0051] Please refer to Figures 1 to 4 In some embodiments, a plurality of guide bearings 110 are provided on the wind shield 100 in a ring-shaped arrangement, and the plurality of guide bearings 110 are respectively connected to the detection tubes 200 .

[0052] It can be understood that the multiple guide bearings 110 are arranged in a ring on the wind shield 100. Therefore, when the multiple detection tubes 200 are connected to the guide bearings 110, the multiple detection tubes 200 will also be arranged to form a ring.

[0053] For example, in some embodiments, the wind shield 100 can be a cylindrical cover structure with one end open, and multiple guide bearings 110 can be arranged in a ring around the central axis of the wind shield 100. As a result, multiple detection tubes 200 can also be arranged in a ring around the central axis of the wind shield 100. When the wind shield 100 is placed on a liquefied gas cylinder, the multiple detection tubes 200 can be arranged in a ring around the angle valve of the liquefied gas cylinder, so that the sampling ports 201 of the multiple detection tubes 200 can be more accurately sampled and the detection effect is more accurate. When part of the detection tubes 200 forms an interference abutment with the angle valve, this part of the detection tubes 200 will move relative to the wind shield 100 to reduce the impact on the covering action of the wind shield 100.

[0054] Please refer to Figures 1 to 6 In some embodiments, a buffer structure (not shown in the figure) is provided at the end of the detection tube 200.

[0055] Optionally, the buffer structure includes but is not limited to soft structures such as rubber blocks and silicone blocks.

[0056] With such an arrangement, when the detection tube 200 comes into contact with the liquefied gas cylinder, the probability of damage caused by rigid collision between the two can be effectively reduced.

[0057] Please refer to Figures 1 to 4 In some embodiments, the detection tube 200 includes a connecting pipe section 210 and an end pipe section 220 located in the detection cavity 101 and connected to each other, and the extension direction of the connecting pipe section 210 and the extension direction of the end pipe section 220 intersect; the sampling port 201 is opened on the connecting pipe section 210 and / or the end pipe section 220.

[0058] It is understood that the extension direction of the connecting pipe section 210 and the extension direction of the terminal pipe section 220 intersect, that is, the terminal pipe section 220 can be arranged in a bent manner relative to the connecting pipe section 210. The sampling port 201 can be provided in the connecting pipe section 210, or the sampling port 201 can be provided in the terminal pipe section 220, or both the connecting pipe section 210 and the terminal pipe section 220 can be provided with the sampling port 201.

[0059] For example, in some embodiments, when there are multiple detection tubes 200, the multiple detection tubes 200 are arranged in a ring around the central axis of the wind shield 100. At this time, the terminal tube sections 220 of the multiple detection tubes 200 can all be offset toward the central axis of the wind shield 100, and the sampling port 201 is opened on the terminal tube section 220. In this way, the terminal tube section 220 is bent toward the middle relative to the connecting tube section 210, and the terminal tube section 220 can be closer to the connection between the angle valve and the cylinder valve seat, that is, the sampling port 201 opened on the terminal tube section 220 can be closer to the possible leakage location, so as to facilitate more accurate detection results. At the same time, when the terminal tube section 220 forms an interference abutment with the cylinder or the angle valve, the terminal tube section 220 will bend upward, and after passing the interference position, it can restore the bending angle under the action of gravity.

[0060] Please refer to Figures 1 to 4 In some embodiments, the leak detection device 1000 also includes a hanger 400 with a hollow structure, which is arranged on the wind shield 100. The hanger 400 is provided with a first connector 410 and a second connector 420 connected to the hollow structure. The first connector 410 is connected to the detection tube 200 through a hose structure, and the second connector 420 is used to connect the detection equipment.

[0061] The suspension rod 400 may be fixedly connected to the wind shield 100 ; or, the suspension rod 400 may be movably connected to the wind shield 100 , for example, rotatably connected or slidably connected to the wind shield 100 .

[0062] The hanger 400 has a hollow structure, and a first connector 410 and a second connector 420 are provided on the hanger 400; thus, when the first connector 410 is connected to the detection tube 200 through the hose structure, the gas sampled by the detection tube 200 from the sampling port 201 can be introduced into the hollow structure of the hanger 400; when the second connector 420 is connected to the detection equipment, the sampled gas in the hollow structure of the hanger 400 can be introduced into the detection equipment for detection.

[0063] For example, in some embodiments, the first connector 410 may adopt a thin hose structure, and the second connector 420 may adopt a thick tube structure, so as to facilitate connection and use.

[0064] Please refer to Figures 1 to 4 In some embodiments, the suspension rod 400 is rotatably disposed on the wind shield 100, and a second elastic reset member 500 is further disposed between the suspension rod 400 and the wind shield 100. The second elastic reset member 500 is configured to elastically deform when the suspension rod 400 rotates relative to the wind shield 100.

[0065] Optionally, the second elastic return member 500 may be, but is not limited to, a compression spring, a tension spring, a rotation spring, etc. When the suspension rod 400 and the wind shield 100 rotate relative to each other, the second elastic return member 500 will be elastically deformed. When the wind shield 100 loses the effect of the external force, the second elastic return member 500 can drive the wind shield 100 to rotate back to its original position.

[0066] In this arrangement, when the wind shield 100 is placed on a liquefied gas cylinder and the detection tube 200 interferes with the angle valve of the liquefied gas cylinder, the wind shield 100 can rotate slightly relative to the suspension rod 400 so that the detection tube 200 rotates synchronously to avoid the angle valve, thereby reducing the impact of the interference between the detection tube 200 and the angle valve.

[0067] Please refer to Figures 1 to 4 In some embodiments, the second elastic return member 500 is a return spring, two mounting posts 120 are fixedly provided on the wind shield 100, and the opposite ends of the return spring are connected to the two mounting posts 120; a hanging rod 430 is fixedly provided on the suspension rod 400, and the hanging rod 430 is connected to the middle part of the return spring.

[0068] The two mounting posts 120 can be installed on the wind shield 100 in parallel with the length direction of the suspension rod 400 and at intervals; the opposite ends of the return spring are connected to the two mounting posts 120 so that the return spring is hung between the two mounting posts 120.

[0069] A hanging rod 430 is also fixedly provided on the suspension rod 400; optionally, the hanging rod 430 can be provided along a length direction perpendicular to the suspension rod 400, and the hanging rod 430 is connected to the middle part of the return spring.

[0070] When the boom 400 rotates relative to the wind shield 100, the hanging rod 430 on the boom 400 will move synchronously and drive the return spring to elastically deform toward one side of the mounting post 120. When the wind shield 100 is no longer under the action of external force, the return spring will use its own elastic restoring force to drive the hanging rod 430 and the boom 400 back to their original positions.

[0071] Please refer to Figures 1 to 4 In some embodiments, the wind shield 100 is further provided with an air blowing nozzle 130 facing the detection chamber 101, and the leak detection device 1000 also includes a multi-way valve 600, the first valve port 610 of the multi-way valve 600 is connected to the second connector 420, the second valve port 620 of the multi-way valve 600 is connected to the detection equipment, the third valve port 630 of the multi-way valve 600 is used to connect the air blowing mechanism, and the fourth valve port 640 of the multi-way valve 600 is connected to the air blowing nozzle 130.

[0072] With this arrangement, the multi-way valve 600 can be operated to open the first valve port 610 and the second valve port 620, while closing the third valve port 630 and the fourth valve port 640. The detection tube 200 can be sampled through the sampling port 201, and the sampled gas can be introduced into the detection equipment for detection. Alternatively, the multi-way valve 600 can be operated to open the first valve port 610, the second valve port 620, the third valve port 630 and the fourth valve port 640, which is in an undetected state at this time; the blowing mechanism can introduce air into the detection tube 200 through the third valve port 630 to discharge the residual sampling gas inside the detection tube 200; the blowing mechanism can introduce air into the detection device through the second valve port 620 to discharge the sampling gas inside the detection device to restore the initial state, thereby avoiding the risk of leakage gas contained in the sampling gas surrounding the detection head of the detection device for a long time, thereby causing the sensitivity of the detection head to decrease and age; at the same time, the blowing mechanism can also introduce external air into the blowing nozzle 130 through the fourth valve port 640, thereby avoiding residual leakage gas in the detection chamber and affecting subsequent detection results. In summary, the blowing mechanism can effectively prevent the detection equipment from continuously inhaling leaked liquefied gas contained in the environment, thereby causing performance degradation, reduced service life, and false alarms.

[0073] Please refer to Figures 1 to 4 In some embodiments, the leak detection device 1000 further includes a lifting mechanism 700 , and an output end of the lifting mechanism 700 is connected to the suspension rod 400 .

[0074] Optionally, the lifting mechanism 700 can be, but is not limited to, a driving structure of a lifting cylinder or a lifting hydraulic cylinder. In this way, the lifting mechanism 700 can drive the boom 400 and the wind shield 100 to perform the cover detection operation, thereby increasing the automation of the leak detection operation.

[0075] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A leak detection device, characterized in that: include A windshield, wherein a detection cavity with an opening is formed inside the windshield; A detection tube, the detection tube being movably connected to the wind shield along the depth direction of the detection cavity, the detection tube being partially located within the detection cavity, and a sampling port being provided on the portion of the detection tube located within the detection cavity; as well as A first elastic reset member, one end of the first elastic reset member is connected to the detection tube, and the other end of the first elastic reset member is fixedly arranged relative to the wind shield.

2. The leak detection device according to claim 1, characterized in that: A guide bearing is provided on the wind shield, and the guide bearing is connected to the detection tube; the first elastic reset member is connected to the fixed part of the guide bearing.

3. The leak detection device according to claim 2, characterized in that: The wind shield is provided with a plurality of guide bearings arranged in a ring, and the plurality of guide bearings are respectively connected to the detection tubes.

4. The leak detection device according to claim 3, characterized in that: A buffer structure is provided at the end of the detection tube.

5. The leak detection device according to claim 3, characterized in that: The detection tube includes a connecting pipe section and a terminal pipe section located in the detection cavity and connected to each other, and the extension direction of the connecting pipe section intersects with the extension direction of the terminal pipe section; the sampling port is opened on the connecting pipe section and / or the terminal pipe section.

6. The leak detection device according to any one of claims 1 to 5, characterized in that: The leak detection device also includes a hanger with a hollow structure, which is arranged on the wind shield. The hanger is provided with a first connector and a second connector connected to the hollow structure. The first connector is connected to the detection tube through a hose structure, and the second connector is used to connect the detection equipment.

7. The leak detection device according to claim 6, characterized in that: The suspension rod is rotatably arranged on the wind shield, and a second elastic reset member is further arranged between the suspension rod and the wind shield. The second elastic reset member is configured to be elastically deformed when the suspension rod rotates relative to the wind shield.

8. The leak detection device according to claim 7, characterized in that: The second elastic reset member is a reset spring. Two mounting posts are fixedly provided on the wind shield, and the opposite ends of the reset spring are connected to the two mounting posts. A hanging rod is fixedly provided on the suspension rod, and the hanging rod is connected to the middle part of the reset spring.

9. The leak detection device according to claim 7 or 8, characterized in that: The wind shield is also provided with an air blowing nozzle facing the detection chamber, and the leak detection device also includes a multi-way valve, the first valve port of the multi-way valve is connected to the second connector, the second valve port of the multi-way valve is connected to the detection equipment, the third valve port of the multi-way valve is used to connect the blowing mechanism, and the fourth valve port of the multi-way valve is connected to the air blowing nozzle.

10. The leak detection device according to claim 9, characterized in that: The leak detection device further comprises a lifting mechanism, and an output end of the lifting mechanism is connected to the suspension rod.

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