Air tightness detection plug comprehensively considering sealing performance and safety

Abstract

The utility model provides an air tightness detection plug comprehensively considering sealing performance and safety. The air tightness detection plug comprises an operation part; the operation part comprises a shell; a telescopic rod is arranged on the shell; a pressing block is arranged at the free end, away from the shell, of the telescopic rod. A seal; the sealing piece is arranged on the telescopic rod in a sleeving manner; the sealing piece is located between the pressing block and the shell. A clamping part; the clamping part is mounted on the shell; the clamping part is provided with a clamping piece capable of transversely stretching out and drawing back, and the clamping piece is used for clamping the cooling pipe and preventing the plug from being disengaged from the cooling pipe. According to the sealing structure, the mode that the sealing piece is squeezed and expanded after being plugged into the cooling pipe is adopted, the defect that air tightness detection is inaccurate due to the fact that gaps are prone to occurring at the edge is overcome, meanwhile, the clamping part is arranged on the side face to clamp the cooling pipe, and the situation that the plug is sprayed out due to too high air pressure is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack air tightness detection tools, and in particular relates to an air tightness detection plug that comprehensively considers sealing and safety. Background Art

[0002] New energy vehicles use unconventional automotive fuels as a power source (or use conventional automotive fuels and adopt new on-board power devices). They generally include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc. Regardless of the structure adopted, there will generally be a battery pack as a power source or transitional power source. With the development of new energy vehicles, the number of new energy vehicles in use is increasing, and the number of large battery packs in use is also increasing. The corresponding inspection and maintenance market is also increasing rapidly, which puts higher requirements on the speed of battery pack inspection. One of the necessary tasks when inspecting the battery pack is to check the airtightness of the cooling pipe to prevent leakage in the cooling pipe, causing coolant to flow into the circuit part of the battery pack and damage the battery pack.

[0003] When testing the tightness of cooling pipes, the outlet is typically blocked with a tool. High-pressure gas is then introduced through the inlet, and the pressure drop is measured to determine if the pipe is leaking. Currently, tools for blocking cooling pipe outlets include external end plugs and plunger plugs. External end plugs are prone to leaks along their edges. While plunger plugs offer better sealing, as the seal wears and friction weakens, the tool may be exposed to high-pressure gas ejection, compromising safety. Utility Model Content

[0004] The purpose of this utility model is to provide an airtightness detection plug that comprehensively considers sealing and safety, thereby overcoming the defects of existing plugging tools that leak or are blown out by high-pressure gas. The specific technical solution is as follows:

[0005] An airtightness detection plug that comprehensively considers sealing and safety, comprising:

[0006] Operating part; the operating part includes a shell; a telescopic rod is provided on the shell; a pressure block is provided on the free end of the telescopic rod away from the shell;

[0007] Sealing member; the sealing member is sleeved on the telescopic rod; the sealing member is located between the pressing block and the housing;

[0008] The locking portion is mounted on the housing; the locking portion is provided with a laterally retractable locking member for locking the cooling pipe to prevent the plug from falling out of the cooling pipe.

[0009] Furthermore, a locking cavity is provided in the locking portion; the telescopic rod extends from the locking cavity; and the locking member is installed on the side wall of the locking portion.

[0010] Furthermore, a second resilient member is provided between the locking member and the side wall of the locking portion to provide elastic force for the locking member to move toward the center of the locking cavity.

[0011] Furthermore, a slot is provided on the locking member; the second resilient member is sleeved on the column of the slot; and the second resilient member is located in the locking cavity.

[0012] Furthermore, the second resilient member adopts a spring structure.

[0013] Furthermore, the locking pieces are symmetrically arranged on the side walls of the locking portion.

[0014] Furthermore, a first inner cavity is provided in the first end of the shell;

[0015] The operating unit further includes:

[0016] A slide; a second inner cavity is provided in the slide; one end of the slide is closed and the other end is open; the slide is invertedly mounted in the first inner cavity, such that the first inner cavity and the second inner cavity of the slide form an elastic cavity relative to each other; the telescopic rod is provided at the center of the slide, and the free end of the telescopic rod passes through the bottom of the first inner cavity and exits the second end of the housing;

[0017] A first resilient member; the first resilient member is disposed in the elastic cavity;

[0018] An operating rod; the first end of the operating rod is rotatably mounted in the first inner cavity, and the operating rod presses or releases the closed end of the slide cylinder during rotation.

[0019] Furthermore, the first resilient member is sleeved on the telescopic rod to ensure the stability of the elastic force during operation.

[0020] Furthermore, a through slot communicating with the first inner cavity is provided on the first end of the shell, so that the operating rod can swing between the first inner cavity and the through slot.

[0021] Furthermore, the middle hole of the sealing element adopts an inverted cone structure.

[0022] Compared with the existing technology, the utility model has the following beneficial effects:

[0023] 1. The sealing structure of the present invention adopts a method of inserting the seal into the cooling pipe and then squeezing and expanding it to overcome the defect that gaps are easily formed at the edges and cause inaccurate air tightness detection. At the same time, a locking part is set on the side to lock the cooling pipe to prevent the plug from being ejected due to excessive air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0025] Figure 1 The figure is a structural diagram of an airtightness detection plug that comprehensively considers sealing and safety.

[0026] Figure 2 The figure is a schematic diagram of the cross-sectional structure of an airtightness detection plug that comprehensively considers sealing and safety.

[0027] Figure 3 Schematic diagram of the cross-sectional structure of the seal.

[0028] Description of main reference numerals:

[0029] Operating part 1, pressing block 11, housing 12, slide 13, through slot 14, operating rod 15, hanging rod 16, first resilient member 17, telescopic rod 18, support column 19, sealing member 2, locking part 3, locking cavity 31, locking member 32, second resilient member 33. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first," "second," and "third" are used solely for descriptive purposes and to distinguish technical features, and are not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0034] Example 1

[0035] like Figures 1 to 3 The figure shows a schematic diagram of the structure of an airtightness detection plug that comprehensively considers sealing and safety, including:

[0036] The operating part 1 comprises a housing 12; the housing 12 is provided with a telescopic rod 18 that can be extended or retracted; a pressure block 11 is provided on the free end of the telescopic rod 18 away from the housing 12;

[0037] The sealing member 2 is mounted on the telescopic rod 18; the sealing member 2 is located between the pressing block 11 and the housing 12;

[0038] The locking portion 3 is mounted on the housing 12; the locking portion 3 is provided with a laterally retractable locking member 32 for locking the cooling pipe to prevent the plug from falling out of the cooling pipe.

[0039] The sealing structure of the present invention adopts a method of inserting the sealing member 2 into the cooling pipe and then squeezing and expanding it to overcome the defect that gaps are easily formed at the edge and cause inaccurate air tightness detection. At the same time, a locking part 3 is set on the side to lock the cooling pipe to prevent the plug from being sprayed out due to excessive air pressure.

[0040] In a specific implementation, a locking cavity 31 is provided in the locking portion 3 ; the telescopic rod 18 extends from the locking cavity 31 ; and the locking member 32 is installed on the side wall of the locking portion 3 .

[0041] In a specific implementation, a second resilient member 33 is provided between the locking member 32 and the side wall of the locking portion 3 to provide elastic force for the locking member 32 to move toward the center of the locking cavity 31 , so that the locking member 32 has the ability to rebound and lock after being pulled out.

[0042] In a specific implementation, a slot is provided on the locking member 32; the second resilient member 33 is mounted on the column of the slot and is restricted from moving in the locking slot; the second resilient member 33 is located in the locking cavity 31, making the entire plug look neater.

[0043] In a specific implementation, the second resilient member 33 adopts a spring structure, and further adopts a compression spring structure.

[0044] In a specific implementation, the positioning members 32 are symmetrically arranged on the side walls of the positioning portion 3 so as to evenly position the cooling pipe and ensure that the plug is evenly stressed. Furthermore, four positioning members 32 are used.

[0045] In a specific implementation, a first inner cavity is provided in the first end of the housing 12 for accommodating and supporting other working components.

[0046] The operating unit 1 further includes:

[0047] The slide 13 is provided with a second inner cavity; one end of the slide 13 is closed and the other end is provided with an opening, and the outer diameter of the slide 13 is adapted to the aperture of the first inner cavity, so that the slide 13 can slide stably in the first inner cavity; the slide 13 is invertedly installed in the first inner cavity so that the first inner cavity is opposite to the second inner cavity, and a retractable elastic cavity is formed between the slide 13 and the shell 12 to provide a closed working space for the first resilient member 17, to ensure the working environment of the first resilient member 17, and to prevent debris from entering and affecting the performance of the first resilient member 17; the telescopic rod 18 is provided at the center of the slide 13, and the free end of the telescopic rod 18 passes through the second end of the shell 12 from the bottom of the first inner cavity (the bottom of the first inner cavity is correspondingly provided with a through hole connected to the outside); when the pressure block 11 follows the telescopic rod 18 to approach the shell 12, the sealing member 2 is restricted by the shell 12 and cannot move, and is then squeezed by the pressure block 11. After being squeezed, the outer diameter expands to seal the internal space of the cooling pipe, thereby achieving a sealing effect;

[0048] The first resilient member 17 is provided in the elastic cavity between the first inner cavity and the second inner cavity so as to provide a restoring elastic force when compressed;

[0049] Operating rod 15; the first end of the operating rod 15 is rotatably installed in the first inner cavity. During the rotation process, the operating rod 15 releases the pressure on the closed end of the slide cylinder 13. Under the action of the return elastic force of the first rebound member 17, the telescopic rod 18 drives the pressure block 11 to squeeze the seal 2. The seal 2 expands under pressure inside the cooling pipe to achieve a sealing effect.

[0050] In a specific implementation, the first resilient member 17 is mounted on the telescopic rod 18 to ensure the stability of the elastic force during operation and prevent the first resilient member 17 from swinging left and right when squeezed.

[0051] In a specific implementation, the first resilient member 17 adopts a spring structure to reduce manufacturing costs; further, a compression spring structure is adopted.

[0052] In practice, the seal 2 utilizes a cylindrical rubber pad, allowing for more room to press outward when squeezed, enhancing sealing performance. Furthermore, the seal 2's central hole adopts an inverted tapered structure, meaning the central portion is smaller than the two ends, with a linear slope between the central and the ends. This ensures that when the seal 2 is squeezed, the interior of the hole also compresses the telescopic rod 18, preventing leakage from the central hole.

[0053] In a specific implementation, a through slot 14 communicating with the first inner cavity is provided on the first end of the shell 12. The through slot 14 is in the shape of an elongated strip, so that the operating rod 15 can swing between the first inner cavity and the through slot 14. That is, the operating rod 15 will not interfere with the side wall of the shell 12 when it is pried.

[0054] In a specific implementation, a hanging hole is provided on the first end of the shell 12 and passes through both sides of the shell 12; a hanging rod 16 is provided on the hanging hole and passes through the shell 12; the first end of the operating rod 15 is rotatably mounted on the hanging rod 16 to facilitate the rotation operation of the operating rod 15.

[0055] In a specific implementation, the outer side surface of the shell 12 is provided with a knurled pattern to increase the resistance of the shell 12 and facilitate operation.

[0056] In a specific implementation, a support column 19 is provided between the housing 12 and the sealing member 2 ; the diameter of the support column 19 is the same as the natural diameter of the sealing member 2 .

[0057] Next, the working principle of this embodiment is described in detail to enable those skilled in the art to better understand the present invention:

[0058] When the sealing operation is not performed, the operating rod 15 is straightened so that the first end of the operating rod 15 squeezes the closure of the slide 13, pushing the slide 13 to move in the first inner cavity toward the bottom of the first inner cavity. During the movement, the bottom of the second inner cavity squeezes the first resilient member 17, causing the first resilient member 17 to be compressed and generate a rebound force; at the same time, the slide 13 also pushes the telescopic rod 18 out of the outer shell 12, and the distance between the pressure block 11 and the outer shell 12 increases. The seal 2 is in a natural state when it is not squeezed. At this time, the diameter of the seal 2 is smaller than the aperture of the cooling pipe, so the seal 2 can be freely placed in the cooling pipe, and then the locking member 32 is pulled outward to loosen the locking position on the cooling pipe, and the plug can be removed.

[0059] When sealing is required, the locking member 32 is pulled outward to create enough space in the locking cavity 31 of the locking portion 3 to accommodate the cooling tube. The sealing member 2 is first inserted into the aperture of the cooling tube, and the locking member 32 is released to lock the cooling tube. The operating rod 15 is then bent to form an angle of approximately 90 degrees with the housing 12. At this time, the operating rod 15 releases the pressure on the slide 13. The slide 13, under the action of the spring's return force, drives the telescopic rod 18 toward the first end of the housing 12. During this process, the pressing block 11 squeezes the sealing member 2, increasing its outer diameter. When the outer diameter of the sealing member 2 is larger than the aperture of the cooling tube, a sealing effect is achieved.

[0060] In summary, the present application provides an airtightness detection plug that comprehensively considers sealing and safety, including: an operating part; the operating part includes a shell; the shell is provided with a telescopic rod; the free end of the telescopic rod away from the shell is provided with a pressure block; a sealing member; the sealing member is sleeved on the telescopic rod; the sealing member is located between the pressure block and the shell; a locking part; the locking part is installed on the shell; the locking part is provided with a laterally retractable locking member for locking the cooling pipe to prevent the plug from falling out of the cooling pipe. The sealing structure in the present utility model adopts a method of squeezing and expanding the sealing member after inserting it into the cooling pipe to overcome the defect that gaps are easily formed at the edge, resulting in inaccurate airtightness detection. At the same time, a locking part is provided on the side to lock the cooling pipe to prevent the plug from being ejected due to excessive air pressure.

[0061] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of illustration and description. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various different choices and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An airtightness detection plug that comprehensively considers sealing and safety, characterized in that: include: Operating part; the operating part includes a shell; a telescopic rod is provided on the shell; a pressure block is provided on the free end of the telescopic rod away from the shell; Sealing member; the sealing member is sleeved on the telescopic rod; the sealing member is located between the pressing block and the housing; The locking portion is mounted on the housing; the locking portion is provided with a laterally retractable locking member for locking the cooling pipe to prevent the plug from falling out of the cooling pipe.

2. The airtightness detection plug according to claim 1, which comprehensively considers sealing and safety, is characterized in that: A clamping cavity is provided in the clamping portion; the telescopic rod extends from the clamping cavity; and the clamping piece is installed on the side wall of the clamping portion.

3. The airtightness detection plug according to claim 2, which comprehensively considers sealing and safety, is characterized in that: A second resilient member is provided between the locking member and the side wall of the locking portion to provide elastic force for the locking member to move toward the center of the locking cavity.

4. The airtightness detection plug according to claim 3, which comprehensively considers sealing and safety, is characterized in that: The locking member is provided with a locking slot; the second resilient member is sleeved on the column of the locking slot; and the second resilient member is located in the locking cavity.

5. The airtightness detection plug according to claim 3, which comprehensively considers sealing and safety, is characterized in that: The second resilient member adopts a spring structure.

6. The airtightness detection plug according to claim 2, which comprehensively considers sealing and safety, is characterized in that: The locking pieces are symmetrically arranged on the side walls of the locking portion.

7. The airtightness detection plug according to claim 1, which comprehensively considers sealing and safety, is characterized in that: A first inner cavity is provided in the first end of the housing; The operating unit also includes: A slide; a second inner cavity is provided in the slide; one end of the slide is closed and the other end is open; the slide is invertedly mounted in the first inner cavity, such that the first inner cavity and the second inner cavity of the slide form an elastic cavity relative to each other; the telescopic rod is provided at the center of the slide, and the free end of the telescopic rod passes through the bottom of the first inner cavity and exits the second end of the housing; A first resilient member; the first resilient member is disposed in the elastic cavity; An operating rod; the first end of the operating rod is rotatably mounted in the first inner cavity, and the operating rod presses or releases the closed end of the slide cylinder during rotation.

8. The airtightness detection plug according to claim 7, which comprehensively considers sealing and safety, is characterized in that: The first resilient member is sleeved on the telescopic rod to ensure the stability of the elastic force during operation.

9. The airtightness detection plug according to claim 7, which comprehensively considers sealing and safety, is characterized in that: A through slot communicating with the first inner cavity is provided on the first end of the shell, so that the operating rod can swing between the first inner cavity and the through slot.

10. The airtightness detection plug according to any one of claims 1 to 9, characterized in that: The middle hole of the sealing element adopts an inverted cone structure.

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