Sealing rubber plug

Abstract

The utility model discloses a sealing rubber plug, which relates to the technical field of sealing rubber plugs, aims to solve the technical problem that the matching degree of the sealing rubber plug is too tight, and comprises a sealing plug main body, and the bottom end of the sealing plug main body is of a conical structure with a round plain end at the bottom. Three supporting cambered surfaces which are distributed in a trisection annular array mode with the sealing plug body as the center are arranged in the middle of the sealing plug body, the diameters of the three supporting cambered surfaces are designed to be gradually decreased from top to bottom to form a plugging slope surface, and a notch surface is formed between the sides, close to one another, of the three supporting cambered surfaces. And the upper half part of the sealing plug main body comprises a tight structure. According to the utility model, the tapered inclined surface is formed by the clamping plug part, and the notch surface and the supporting cambered surface are designed, so that the sealing aluminum sheet sealing device has the advantages of being capable of being matched with an aluminum sheet hole, pressing down and sealing in place, improving the airtightness detection accuracy after laser welding of a sealing aluminum sheet, and being capable of saving labor and being quickly inserted and pulled out at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rubber plugs, and more specifically, to a sealing rubber plug. Background Art

[0002] During the production and processing of lithium batteries, in order to prevent leakage during the production operation after the aluminum upper cover of the lithium battery is filled with liquid, an aluminum sealing sheet must be used to completely seal the liquid filling hole glue screen by laser welding after the battery is completed. After the sealing aluminum sheet and the aluminum cover plate liquid filling hole are laser welded, the sealing performance of the laser welding must be tested. Currently, there is a difficult problem in the industry. After the sealing aluminum sheet and the aluminum cover plate liquid filling hole are welded, the welding scar sealing test must be performed. At this time, the sealing plug of the lower liquid filling hole is too tight. Since the conventional sealing plug is too tight, it will lead to the inability to detect whether the sealing aluminum sheet welding position is sealed, resulting in poor detection accuracy. In view of this, we propose a sealing plug. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art, meet practical needs, and provide a sealing rubber plug to solve the technical problem that the current sealing rubber plug is too tight, resulting in poor accuracy in airtightness detection of the sealed aluminum sheet.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a sealing rubber plug, including a sealing plug body, the bottom end of the sealing plug body is a conical structure with a circular flat bottom, the middle part of the sealing plug body is provided with three supporting arc surfaces distributed in a circular array divided into three equal parts with the sealing plug body as the center, the diameters of the three supporting arc surfaces are designed to gradually decrease from top to bottom to form an insertion slope surface, a notch surface is formed between the sides of the three supporting arc surfaces close to each other, and the upper half of the sealing plug body contains a tight structure.

[0005] Preferably, the compact structure includes a straight neck and a plug portion, the straight neck has the same diameter from top to bottom, the plug portion is located below the straight neck and is designed with a conical slope, and the bottom diameter of the plug portion is smaller than the top diameter.

[0006] Preferably, a notch is provided at the center of the top of the straight neck for facilitating the installation of an O-ring and assisting in positioning.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] 1. The utility model forms a tapered inclined surface through the plugging part, and cooperates with the deformation and elasticity of the sealing plug itself, so that it can be sealed into the structure in the lithium battery manufacturing process by pressing down, achieving a moderate sealing effect between the sealing plug and the sealing hole, so as to achieve the effect of testing whether the welding scar of the sealed aluminum sheet is leaking after laser welding, and solve the problem of poor accuracy of the airtightness detection of the sealed aluminum sheet due to the tight fit of the sealing plug.

[0009] 2. The utility model also facilitates insertion through the design of the notch surface and the supporting arc surface. At the same time, the triangle provides stability, and the supporting arc surface can play a stabilizing role. The straight handle is designed to have a hand-grip portion for lifting, which can save effort in inserting and removing the sealing plug, further solving the problem of easy obstruction of insertion due to the large diameter of the bottom end of the sealing plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 For the utility model Figure 1 Left view of;

[0012] Figure 3 This is a schematic diagram of the present invention facing the notch.

[0013] Explanation of the numbers in the figure: 1. Sealing plug body; 101. Support arc surface; 102. Notch surface; 103. Notch; 2. Tight structure; 201. Straight neck; 202. Plug part. DETAILED DESCRIPTION

[0014] like Figures 1 to 3 As shown, the utility model relates to a sealing plug, including a sealing plug body 1, the upper half of the sealing plug body 1 includes a tight structure 2, the tight structure 2 includes a straight neck 201 and a plug part 202, the straight neck 201 has the same diameter from top to bottom, and a recess 103 for facilitating the installation of an O-ring and auxiliary positioning is provided at the top center of the straight neck 201, the plug part 202 is located below the straight neck 201 and is designed with a tapered slope, the bottom diameter of the plug part 202 is smaller than the top diameter, when the sealing plug body 1 is inserted, the bottom end of the plug part 202 is matched with the aluminum sheet hole, and the lithium battery manufacturing process can be sealed in place by pressing downward as the slope is pressed, and then after the laser welding of the sealing aluminum sheet and the aluminum cover plate hole surface is completed, the sealing screen glue will loosen due to thermal expansion and contraction, thereby achieving the effect of being able to test whether the welding scar is leaking after the laser welding of the sealing aluminum sheet.

[0015] In the embodiment of the present invention, since the sealing plug is made of a rubber-like material with certain deformation ability and elasticity and high friction, the lower half may be blocked or bent during the insertion process, affecting the insertion speed and processing efficiency. In order to facilitate insertion, the bottom end of the sealing plug body 1 is a conical structure with a circular flat bottom. The middle part of the sealing plug body 1 is provided with three supporting arc surfaces 101 distributed in a circular array divided into three equal parts with the sealing plug body 1 as the center. The diameters of the three supporting arc surfaces 101 are designed to gradually decrease from top to bottom to form an insertion slope surface, and a notch surface 102 is formed between the sides where the three supporting arc surfaces 101 are close to each other. It should be noted that the maximum diameter of the insertion slope surface is equal to the minimum diameter of the plugging part 202. Since the diameter of the insertion slope surface gradually increases from bottom to top, combined with the depression of the notch surface 102, the contact surface is reduced, making the insertion process more labor-saving and quick.

[0016] Working principle: This embodiment provides a sealing rubber plug. When in use, the sealing plug body 1 is inserted. Since the diameter of the lower half is smaller and the notch surface 102 reduces the contact surface, it is more convenient to insert. After the bottom end of the plug part 202 is matched with the aluminum sheet hole, it is pressed down with the slope to seal in place. After the laser welding of the sealing aluminum sheet and the aluminum cover plate hole surface is completed, the sealing screen glue will loosen due to thermal expansion and contraction, thereby achieving the effect of being able to test whether the welding scar is leaking after the laser welding of the sealing aluminum sheet.

[0017] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A sealing rubber plug, characterized in that: The invention comprises a sealing plug body (1), wherein the bottom end of the sealing plug body (1) is a conical structure with a circular flat bottom, and the middle part of the sealing plug body (1) is provided with three supporting arc surfaces (101) distributed in a circular array divided into three equal parts with the sealing plug body (1) as the center, and the diameters of the three supporting arc surfaces (101) are designed to gradually decrease from top to bottom to form a plug-in slope surface, and a notch surface (102) is formed between the sides of the three supporting arc surfaces (101) that are close to each other, and the upper half of the sealing plug body (1) includes a tight structure (2).

2. A sealing rubber plug according to claim 1, characterized in that: The compact structure (2) comprises a straight neck (201) and a plugging portion (202); the straight neck (201) has the same diameter from top to bottom; the plugging portion (202) is located below the straight neck (201) and is designed as a tapered slope.

3. A sealing rubber plug according to claim 2, characterized in that: The bottom diameter of the plugging portion (202) is smaller than the top diameter.

4. A sealing rubber plug according to claim 3, characterized in that: A notch (103) is provided at the center of the top of the straight neck (201) for facilitating the installation of an O-ring and assisting in positioning.

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