Plugging device for helium leak detection

Abstract

The plugging device is characterized in that the plugging device comprises a sealing sleeve, an inner sleeve, an elastic piece, a buckle and a connecting rod, the bottom face of the sealing sleeve is a first sealing part, the elastic piece is arranged in an inner cavity of the sealing sleeve, the inner sleeve is arranged on the elastic piece in a covering mode, the upper end of the inner sleeve is closed, and the lower end of the inner sleeve is closed. A second sealing part is formed between the inner wall of the sealing sleeve and the outer wall of the inner sleeve, the lower portion of the buckle penetrates through a center round hole in the bottom of the sealing sleeve, the upper end of the connecting rod is connected to the inner top face of the inner sleeve, the lower end of the connecting rod is limited in the center hole of the buckle, the lower portion of the buckle is of an expansion structure, and the lower end of the connecting rod makes contact with the center hole of the buckle through a conical face. And an eccentric pressing mechanism for pressing the top surface of the inner sleeve is arranged at the upper part of the sealing sleeve. The device has the advantages that the structure is simple, the inner side of the via hole is clamped through the buckle, the connecting rod pulls back and locks the buckle to achieve end face plugging, the helium detection sealing plugging test requirement is met, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the field of sealing devices, in particular to a sealing device used for helium leak detection. Background Art

[0002] Some friction welding products require testing the sealing of the welding water channel. Helium leak detection is usually used to identify whether the water channel cavity meets the sealing requirements. The existing practice is to use a plug to press and seal it from the front. However, the position of some holes on the product is special. The front is flat and the position is small, which cannot be sealed by front pressure. Therefore, it is necessary to design an end face sealing plug with an inner snap-on design. The plug is sealed by pulling back from the inner snap-on design to meet the helium testing sealing requirements. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a sealing device for helium leak detection, which has a simple structure, realizes clamping of the inner side of the through hole, has a simple sealing method, and meets the sealing detection requirements.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The closure of the seal is sealed to the sealant, and the sealant is sealed to the sealant, and the closure is sealed to the sealant.

[0006] Furthermore, the elastic member is a compression spring.

[0007] Furthermore, the outer periphery of the lower end of the buckle has a ring-shaped hanging platform.

[0008] Furthermore, the eccentric clamping mechanism includes a rotating pin and a pressure rod arranged on the upper part of the sealing sleeve. The rotating pin is transversely penetrated through the upper part of the sealing sleeve. The lower part of the pressure rod is rotatably connected to the rotating pin. The lower end surface of the pressure rod is a spherical surface, and the side wall of the sealing sleeve has an avoidance groove.

[0009] The beneficial effects of the utility model include: simple structure, using the buckle to clamp the inner side of the through hole, pulling the connecting rod back to lock the buckle to achieve end face sealing, meeting the helium inspection sealing and plugging test requirements, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 It is a schematic structural diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0012] The present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

[0013] A kind of Figure 1-2 The sealing device for helium leak detection shown is characterized by comprising a sealing sleeve 1, an inner sleeve 2, an elastic member 3, a buckle 4, and a connecting rod 5. The bottom surface of the sealing sleeve 1 is a first sealing portion, and the first sealing portion is provided with a first sealing ring 6, which contacts the plane to be sealed. The elastic member 3 is a compression spring and is placed in the inner cavity of the sealing sleeve 1. The inner sleeve 2 is covered on the elastic member 3 so that the inner sleeve 2 is elastically lifted. The upper end of the inner sleeve 2 is closed, and a second sealing portion is formed between the inner wall of the sealing sleeve 1 and the outer wall of the inner sleeve 2. The second sealing portion is provided with three second sealing rings 7 arranged vertically at intervals, so that the sealing device can achieve sealing of the hole position. The lower part of the buckle 4 passes through the central circular hole at the bottom of the sealing sleeve 1, and the outer periphery of the lower end of the buckle 4 has a ring-shaped hanging platform for hanging the inner end face of the hole to be sealed. The upper end of the connecting rod 5 is connected to the inner top surface of the inner sleeve 2, and the lower end of the connecting rod 5 is limited in the center hole of the buckle 4. The lower portion of the buckle 4 is an expansion structure, and the lower end of the connecting rod 5 contacts the center hole of the buckle 4 with a conical surface. The inner sleeve 2 is naturally pushed upward by the action of the spring. When the connecting rod 5 is in a taut state, the lower end of the buckle 4 expands outward and is limited to the inner end surface of the hole to be blocked. The upper portion of the sealing sleeve 1 is provided with an eccentric pressing mechanism that presses against the top surface of the inner sleeve 2. This eccentric mechanism is used to press the inner sleeve 2 to release the expansion state of the buckle 4.

[0014] The eccentric pressing mechanism includes a rotating pin 8 and a pressure rod 9 arranged on the upper part of the sealing sleeve 1. The rotating pin 8 is horizontally penetrated through the upper part of the sealing sleeve 1. The lower part of the pressure rod 9 is rotatably connected to the rotating pin 8. The lower end surface of the pressure rod 9 is a spherical surface, and an avoidance groove is provided on the side wall of the sealing sleeve 1.

[0015] The principle of the utility model is that the pressure rod is tightened, the spring is compressed, the connecting rod is pressed down to release the buckle, and the buckle is extended into the product in the relaxed state. After the plug is installed, the pressure rod is loosened, the spring is loosened, the connecting rod is pulled back to tighten the buckle, and the end face sealing ring is compressed to seal.

[0016] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A plugging device for helium leak detection, characterized in that: The invention comprises a sealing sleeve (1), an inner sleeve (2), an elastic member (3), a buckle (4), and a connecting rod (5), wherein the bottom surface of the sealing sleeve (1) is a first sealing portion, the first sealing portion is provided with a first sealing ring (6), the elastic member (3) is placed in the inner cavity of the sealing sleeve (1), the inner sleeve (2) is covered with the elastic member (3), the upper end of the inner sleeve (2) is closed, and the inner wall of the sealing sleeve (1) and the outer wall of the inner sleeve (2) form a second sealing portion, and the second sealing portion is provided between the inner wall of the sealing sleeve (1) and the outer wall of the inner sleeve (2). The inner sleeve (2) is provided with a plurality of second sealing rings (7), the lower part of the buckle (4) passes through the central circular hole at the bottom of the sealing sleeve (1), the upper end of the connecting rod (5) is connected to the inner top surface of the inner sleeve (2), the lower end of the connecting rod (5) is limited in the central hole of the buckle (4), and the lower part of the buckle (4) is an expansion structure. The lower end of the connecting rod (5) contacts the central hole of the buckle (4) with a conical surface, and the upper part of the sealing sleeve (1) is provided with an eccentric pressing mechanism for pressing the top surface of the inner sleeve (2).

2. The plugging device for helium leak detection according to claim 1, characterized in that: The elastic member (3) is a compression spring.

3. The plugging device for helium leak detection according to claim 1, characterized in that: The outer periphery of the lower end of the buckle (4) is provided with an annularly distributed hanging platform.

4. The plugging device for helium leak detection according to claim 1, characterized in that: The eccentric pressing mechanism comprises a rotating pin (8) and a pressure rod (9) arranged on the upper part of the sealing sleeve (1); the rotating pin (8) is arranged to pass through the upper part of the sealing sleeve (1) in a transverse direction; the lower part of the pressure rod (9) is rotatably connected to the rotating pin (8); the lower end surface of the pressure rod (9) is a spherical surface; and an avoidance groove is provided on the side wall of the sealing sleeve (1).

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