CN217716811U - Helium test sealing structure - Google Patents

Abstract

The utility model provides a helium test seal structure, by the bottom plate, the positioning seat, two springs, the loose axle, three O type circle, components such as admission connector. During helium detection, the pressure head moves downwards to press the product, the movable shaft is driven to move downwards, the two springs are stressed and contracted simultaneously, and the movable shaft downwards extrudes the O-shaped ring to radially expand and seal the product. Helium enters the interior of the product through holes in the air inlet joint and the movable shaft, and the sealing test environment is realized. The utility model discloses traditional seal structure is replaced to the structure, reduces the required redesign of the regulator seat of the difference in various model internal diameters of adaptation, reduces new product development cost and manufacturing cost.

Description

Helium test sealing structure

Technical Field

The utility model relates to an automobile parts makes field, especially helium test field.

Background

In the fuel supply system of the automobile, the sealing performance of parts is very important, and the safety problem of people and vehicles is concerned. Before shipping, a leak tightness test must be performed, and a helium test is a widely used test method. When the helium detection test is carried out, the parts are sealed, helium gas is filled for pressure maintaining, and whether the parts leak or not is tested.

When designing a helium detection tool of a pressure stabilizer seat, designers mostly adopt a fixed sealing head structure. Because the types are different and the inner diameters of the voltage stabilizer bases are different, a set of tool needs to be designed and processed for the voltage stabilizer bases with different inner diameters. The irrational structure of the tool sealing structure causes repeated design work and also increases unnecessary project investment cost. In addition, the helium detection box needs to be replaced every time the product is replaced, which wastes time and labor. Meanwhile, in order to meet the rising of the production requirement of the product, the helium detection box needs to be repeatedly put into the helium detection box, and the production cost is increased.

Disclosure of Invention

In order to solve the above-mentioned prior art problem, the utility model provides a seal structure frock is examined to helium replaces traditional seal structure, reduces the required redesign of regulator seat for the various model internal diameters of adaptation are different, reduces new product development cost and manufacturing cost.

The utility model is shown in the attached figure 1 of the specification and comprises a bottom plate 1, a positioning seat 2, a spring A3, a spring B4, a movable shaft 5, an O-shaped ring A8, an O-shaped ring B9, an O-shaped ring C10, an air inlet joint 11 and the like. The positioning seat 2 is fixed on the bottom plate 1, and the movable shaft 5 reciprocates up and down on the positioning seat 2. The spring A3 and the spring B4 are respectively arranged on the positioning seat 2 and are in contact with the movable shaft 5. In the helium test, the product 6 is placed on the movable shaft 5. The pressure head 7 is positioned right above the product 6 and is connected with the helium testing equipment, and the pressure head 7 is set to reciprocate up and down. The O-shaped ring A8 is positioned between the positioning seat 2 and the movable shaft 5, and is radially expanded when being extruded by the movable shaft 5 to seal the product 6.O type circle B9, O type circle C10 seal up positioning seat 2 and loose axle 5, bottom plate 1 and positioning seat 2 respectively, realize the utility model discloses overall structure's is sealed. The center of the movable shaft 5 is provided with a hole, the lower end of the movable shaft is provided with an air inlet joint 11, and helium can enter the inside of the product 6 through the air inlet joint 11 and the hole on the movable shaft 5. During helium detection, the pressure head 7 moves downwards to press the product 6, the movable shaft 5 is driven to move downwards, the spring A3 and the spring B4 are stressed to contract, and the movable shaft 5 downwards presses the O-shaped ring A8 to radially expand and seal the product 6. Helium gas enters the interior of the product 6 through the inlet fitting 11 and the holes in the movable shaft 5 and the leak tightness test is started. After the test is finished, the pressure head 7 moves upwards, the spring A3 and the spring B4 rebound upwards, the movable shaft 5 is stressed to reset upwards, the O-shaped ring A8 retracts, the product 6 is taken down, and the operation is finished.

The utility model has the advantages that: firstly, the helium test structure can realize the convenience of sharing multiple products due to the expansibility of the O-shaped ring, each device can be installed by one pair, and can be adapted to tested seats with different types and inner diameters, so that the production investment cost can be greatly reduced, and the period and investment of new project development are also reduced; secondly, because the sealing rings are in a contracted state when the products are placed and taken out, the products are taken and placed in a labor-saving manner, and the operation is quicker; thirdly, the inner wall of the product is less rubbed and scratched, and the product quality is ensured.

Drawings

Fig. 1 is a structural sectional view of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

First, the utility model discloses after the frock is made and is accepted, fix its installation on professional equipment, through detecting qualified back, just can carry out helium and examine test work. As shown in figure 1, a product 6 is placed on a movable shaft 5, a pressure head 7 moves downwards to press the product 6, the movable shaft 5 is driven to move downwards, a spring A3 and a spring B4 are stressed and contracted, the movable shaft 5 extrudes an O-shaped ring A8 downwards to enable the O-shaped ring to produce radial expansion to seal the product 6, a positioning seat 2, the movable shaft 5, a bottom plate 1 and a positioning seat 2 are respectively sealed by an O-shaped ring B9 and an O-shaped ring C10, and the whole structure of the utility model is sealed at the moment. Helium gas enters the interior of the product 6 through the air inlet joint 11 and the vent holes in the movable shaft 5, and the tightness test is started. After the test is finished, the pressure head 7 moves upwards, the spring A3 and the spring B4 rebound upwards, the movable shaft 5 is forced to reset upwards, and the O-shaped ring A8 retracts. At this time, the product 6 is taken down, and the helium test operation is completed.

Claims (1)

1. The utility model provides a helium detects test seal structure which characterized in that: helium detection test seal structure includes bottom plate (1), positioning seat (2), spring A (3), spring B (4), loose axle (5), O type circle A (8), O type circle B (9), O type circle C (10), air-in connection (11), positioning seat (2) are fixed on bottom plate (1), loose axle (5) are in do reciprocal activity from top to bottom on positioning seat (2), spring A (3) and spring B (4) set up respectively on positioning seat (2), with loose axle (5) contact, O type circle A (8) are located positioning seat (2) with between loose axle (5), receive radial expansion produces during loose axle (5) extrusion, O type circle B (9), O type circle C (10) are sealed respectively positioning seat (2) with loose axle (5) bottom plate (1) with positioning seat (2), loose axle (5) center is porose, and the lower extreme is equipped with air-in connection (11), the accessible air-in connection (11) with the inside helium that gets into hole (6) of loose axle (5).

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