Plunger type plug for air tightness detection

Abstract

The utility model provides a plunger type plug for air tightness detection. The plunger type plug comprises a shell; a cylindrical hole is formed in the first end of the shell; a sleeve; one end of the sleeve is closed, and the other end is provided with an opening; the sleeve is mounted in the cylindrical hole in a sliding and inverted manner; a push rod is arranged in the center of the sleeve, and the free end of the push rod penetrates out of the second end of the shell from the bottom of the cylindrical hole; a pressing block is arranged at the free end of the push rod; the push rod is sleeved with a sealing piece at the part between the pressing block and the shell; a springback member; the springback piece is arranged between the cylindrical hole and the interior of the sleeve; an operating lever; and the first end of the operating rod is rotatably mounted in the cylindrical hole. According to the sealing structure, the mode that the sealing piece is squeezed and expanded after being plugged into the cooling pipe is adopted, and the defects that the physical output of workers is high, gaps are prone to occurring at the edges, and consequently airtightness detection is not accurate are overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack air tightness detection tools, in particular to a plunger-type plug for air tightness detection. 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 typical method is to plug the pipe outlet with a plug and then fill the pipe inlet with pressurized gas or coolant to detect leaks. However, in current maintenance techniques, the pipe outlet is manually plugged with a plug. This method not only requires high labor consumption but also easily creates gaps at the edges, resulting in inaccurate airtightness testing. Utility Model Content

[0004] The purpose of this utility model is to provide a plunger-type plug for airtightness testing, thereby overcoming the defects of high manual labor consumption and the easy occurrence of gaps at the edges, which leads to inaccurate airtightness testing. The specific technical solution is as follows:

[0005] A plunger plug for air tightness detection, comprising:

[0006] The first end of the housing is provided with a cylindrical hole;

[0007] A sleeve; one end of the sleeve is closed and the other end is provided with an opening; the sleeve is slidably and invertedly installed in the cylindrical hole so that the inner cavity of the cylindrical hole is opposite to the inner cavity of the sleeve; a push rod is provided in the center of the sleeve, and the free end of the push rod passes through the bottom of the cylindrical hole and extends outside the second end of the shell; a pressure block is provided on the free end of the push rod; a seal is provided on the push rod between the pressure block and the shell;

[0008] Resilient member; the resilient member is arranged between the cylindrical hole and the interior of the sleeve;

[0009] Operating rod; the first end of the operating rod is rotatably installed in the cylindrical hole, and the operating rod releases the pressure on the closed end of the sleeve during rotation. Under the action of the return elastic force of the rebound part, the push rod drives the pressure block to squeeze the sealing part, and the sealing part expands under pressure inside the cooling pipe to achieve a sealing effect.

[0010] Furthermore, the resilient member is sleeved on the push rod to ensure the stability of the elastic force during operation.

[0011] Furthermore, the resilient member adopts a spring structure.

[0012] Furthermore, the sealing member is a cylindrical rubber pad.

[0013] Furthermore, a through slot communicating with the cylindrical hole is provided on the first end of the housing, so that the operating rod can swing between the cylindrical hole and the through slot.

[0014] Furthermore, a hanging hole is provided on the first end of the shell; a hanging rod is provided on the hanging hole and passes through the shell; and the first end of the operating rod is rotatably mounted on the hanging rod.

[0015] Furthermore, the outer side surface of the shell is provided with a knurling pattern.

[0016] Furthermore, a support column is provided between the housing and the sealing element; the diameter of the support column is the same as the natural diameter of the sealing element.

[0017] Furthermore, the outer diameter of the sleeve is adapted to the diameter of the cylindrical hole, so that the sleeve can slide stably in the cylindrical hole.

[0018] Furthermore, the middle hole of the sealing element adopts an inverted cone structure.

[0019] Compared with the existing technology, the utility model has the following beneficial effects:

[0020] 1. The sealing structure of the present invention adopts the method of inserting the seal into the cooling pipe and then squeezing and expanding it, which overcomes the defects of high labor consumption and easy occurrence of gaps at the edges, resulting in inaccurate airtightness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 The present invention is a structural diagram of a plunger-type plug for air tightness testing.

[0023] Figure 2 The present invention is a schematic cross-sectional view of the structure of a plunger-type plug for air tightness testing.

[0024] Figure 3 Schematic diagram of the cross-section of the seal 6.

[0025] Description of main reference numerals:

[0026] Hanging rod 1, housing 2, cylindrical hole 21, through slot 22, operating rod 3, sleeve 4, push rod 41, support column 5, sealing member 6, pressing block 7, and rebound member 8. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1

[0032] like Figures 1 to 3 The figure shows a schematic diagram of the structure of a plunger plug for air tightness testing, including:

[0033] The housing 2 has a cylindrical hole 21 at the first end thereof for accommodating and supporting other working parts;

[0034] Sleeve 4; one end of the sleeve 4 is closed and the other end is provided with an opening, the outer diameter of the sleeve 4 is adapted to the aperture of the cylindrical hole 21, so that the sleeve 4 can slide stably in the cylindrical hole 21; the sleeve 4 is installed in the cylindrical hole 21 in a sliding and inverted manner, so that the inner cavity of the cylindrical hole 21 is opposite to the inner cavity of the sleeve 4, and a retractable space is formed between the sleeve 4 and the shell 2 to provide a closed working space for the resilient member 8, ensure the working environment of the resilient member 8, and prevent debris from entering and affecting the performance of the resilient member 8; the sleeve A push rod 41 is provided at the center of the housing 2. The free end of the push rod 41 passes through the bottom of the cylindrical hole 21 (the bottom of the cylindrical hole 21 is correspondingly provided with a through hole connected to the outside) and extends out of the second end of the housing 2. A pressing block 7 is provided on the free end of the push rod 41. A sealing member 6 is sleeved on the push rod 41 between the pressing block 7 and the housing 2. When the pressing block 7 follows the push rod 41 and approaches the housing 2, the sealing member 6 is restricted by the housing 2 and cannot move. The sealing member is then squeezed by the pressing block 7. After being squeezed, the outer diameter of the sealing member expands to seal the internal space of the cooling pipe, thereby achieving a sealing effect.

[0035] Resilient member 8; the resilient member 8 is provided in the retractable space between the cylindrical hole 21 and the interior of the sleeve 4 so as to provide a restoring elastic force when compressed;

[0036] Operating rod 3; the first end of the operating rod 3 is rotatably installed in the cylindrical hole 21. During the rotation, the operating rod 3 releases the pressure on the closed end of the sleeve 4. Under the action of the return elastic force of the rebound member 8, the push rod 41 drives the pressure block 7 to squeeze the seal 6. The seal 6 expands under pressure inside the cooling pipe to achieve a sealing effect.

[0037] The sealing structure of the present invention adopts the method of inserting the sealing member 6 into the cooling pipe and then squeezing and expanding it, thereby overcoming the defects of high labor consumption and easy occurrence of gaps at the edges, which leads to inaccurate airtightness detection.

[0038] In a specific implementation, the resilient member 8 is mounted on the push rod 41 to ensure the stability of the elastic force during operation and prevent the resilient member 8 from swinging left and right when squeezed.

[0039] In a specific implementation, the resilient member 8 adopts a spring structure to reduce manufacturing costs; further, a compression spring structure is adopted.

[0040] In practice, the seal 6 utilizes a cylindrical rubber pad, allowing for more room to press outward when squeezed, enhancing sealing performance. Furthermore, the central hole of the seal 6 utilizes an inverted tapered structure, meaning the diameter of the central portion is smaller than that of the two ends, with a linear slope between the central portion and the ends. This ensures that when the seal 6 is squeezed, the interior of the hole also compresses the push rod 41, preventing leakage from the central hole of the seal 6.

[0041] In a specific implementation, a through groove 22 connecting to the cylindrical hole 21 is provided on the first end of the shell 2. The through groove 22 is in the shape of an elongated strip, so that the operating rod 3 can swing between the cylindrical hole 21 and the through groove 22, that is, the operating rod 3 will not interfere with the side wall of the shell 2 when it is bent.

[0042] In a specific implementation, a hanging hole is provided on the first end of the shell 2 and passes through both sides of the shell 2; a hanging rod 1 is provided on the hanging hole and passes through the shell 2; the first end of the operating rod 3 is rotatably mounted on the hanging rod 1 to facilitate the rotation operation of the operating rod 3.

[0043] In a specific implementation, the outer side surface of the shell 2 is provided with a knurled pattern to increase the resistance of the shell 2 and facilitate operation.

[0044] In a specific embodiment, a support column 5 is provided between the housing 2 and the seal 6; the diameter of the support column 5 is the same as the natural diameter of the seal 6. In addition, after the seal 6 enters the inner hole of the cooling pipe, it can be rinsed with soapy water to check whether the seal is secure without obstructing the view.

[0045] Next, the working principle of this embodiment is described in detail to enable those skilled in the art to better understand the present invention:

[0046] When the sealing operation is not performed, the operating rod 3 is straightened so that the first end of the operating rod 3 squeezes the seal of the sleeve 4, pushing the sleeve 4 to move in the cylindrical hole 21 toward the bottom of the cylindrical hole 21. During the movement, the bottom of the inner cavity of the sleeve 4 squeezes the resilient member 8, causing the resilient member 8 to be compressed and generate a rebound force; at the same time, the sleeve 4 also pushes the push rod 41 out of the outer shell 2, and the distance between the pressure block 7 and the outer shell 2 increases. The seal 6 is in a natural state when not squeezed. At this time, the diameter of the seal 6 is smaller than the aperture of the cooling pipe, so the seal 6 can be freely placed in the cooling pipe.

[0047] When sealing operation is required, the sealing member 6 is first inserted into the aperture of the cooling tube, and then the operating rod 3 is bent to an angle of about 90 degrees with the outer shell 2. At this time, the operating rod 3 releases the squeeze on the sleeve 4, and the sleeve 4 drives the push rod 41 to move toward the first end of the outer shell 2 under the action of the restoring elastic force of the spring. During this process, the pressure block 7 squeezes the sealing member 6, so that the outer diameter of the sealing member 6 increases. When the outer diameter of the sealing member 6 is larger than the aperture of the cooling tube, it can achieve a sealing effect.

[0048] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The sealing structure of the utility model adopts the method of inserting the sealing member into the cooling pipe and then squeezing and expanding it, thereby overcoming the defects of high labor consumption and easy occurrence of gaps at the edges, which leads to inaccurate airtightness detection.

[0049] 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. A plunger plug for air tightness detection, characterized in that: include: The first end of the housing is provided with a cylindrical hole; A sleeve; one end of the sleeve is closed and the other end is provided with an opening; the sleeve is slidably and invertedly installed in the cylindrical hole so that the inner cavity of the cylindrical hole is opposite to the inner cavity of the sleeve; a push rod is provided in the center of the sleeve, and the free end of the push rod passes through the bottom of the cylindrical hole and extends outside the second end of the shell; a pressure block is provided on the free end of the push rod; a seal is provided on the push rod between the pressure block and the shell; Rebound piece; The resilient member is arranged between the cylindrical hole and the interior of the sleeve; Operating rod; the first end of the operating rod is rotatably installed in the cylindrical hole, and the operating rod releases the pressure on the closed end of the sleeve during rotation. Under the action of the return elastic force of the rebound part, the push rod drives the pressure block to squeeze the sealing part, and the sealing part expands under pressure inside the cooling pipe to achieve a sealing effect.

2. The plunger plug for airtightness detection according to claim 1, characterized in that: The resilient member is sleeved on the push rod to ensure the stability of the elastic force during operation.

3. The plunger plug for airtightness detection according to claim 2, characterized in that: The resilient member adopts a spring structure.

4. The plunger plug for airtightness detection according to claim 1, characterized in that: The sealing element adopts a cylindrical rubber pad.

5. The plunger plug for airtightness detection according to claim 1, characterized in that: A through slot communicating with the cylindrical hole is provided on the first end of the shell, so that the operating rod can swing between the cylindrical hole and the through slot.

6. The plunger plug for airtightness detection according to claim 1, characterized in that: A hanging hole is provided on the first end of the shell; a hanging rod is provided on the hanging hole and crosses the shell; and the first end of the operating rod is rotatably mounted on the hanging rod.

7. The plunger plug for airtightness detection according to claim 1, characterized in that: The outer side surface of the shell is provided with a knurling pattern.

8. The plunger plug for airtightness detection according to claim 1, characterized in that: A support column is provided between the shell and the sealing element; the diameter of the support column is the same as the natural diameter of the sealing element.

9. The plunger plug for airtightness detection according to claim 1, characterized in that: The outer diameter of the sleeve is adapted to the aperture of the cylindrical hole, so that the sleeve can slide stably in the cylindrical hole.

10. The plunger plug for airtightness detection 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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