CN202693215U

CN202693215U - Hole sealing device for airtight test

Info

Publication number: CN202693215U
Application number: CN 201220337203
Authority: CN
Inventors: 王军; 庹海涛
Original assignee: Xinxing Heavy Industry Hubei 3611 Mechanical Co Ltd
Current assignee: Xinxing Heavy Industry Hubei 3611 Mechanical Co Ltd
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2013-01-23
Anticipated expiration: 2022-07-12

Abstract

The utility model provides a hole sealing device for an airtight test. An eccentric wheel is mounted at the upper part of a pull rod; a nut is mounted at the lower part of the pull rod; and a rubber sleeve extruded through the eccentric wheel to generate deformation for sealing a hole is sleeved on the pull rod at the upper part of the nut. Gaskets are sleeved on the pull rod at the upper end and the lower end of the rubber sleeve. A handle is arranged on the eccentric wheel. By using the hole sealing device, the deformation of a product cannot be caused; the hole sealing device is simple in structure and low in cost and is convenient to manufacture; and the range of application is wide.

Description

A kind of hole packoff for air-tight test

Technical field

The utility model relates to a kind of hole packoff, is used for air-tight test.

Background technology

The intermediate cavity of thin-wall box body class aluminum alloy part (see figure 1) is normally pushed down periphery flange when doing 0.3MPA pressure gas tightness test, the end face hole is pushed down again, and fills 0.3MPA air pressure.But this product top wall thickness only has 20mm, if directly be pressed on the end face, be easy to and can product compressive strain (see figure 2), can the flatness of 0.05mm be made a big impact like this.

Summary of the invention

Goal of the invention of the present utility model is to overcome the above-mentioned deficiency of prior art and a kind of easy to use, hole packoff that is used for air-tight test that can not cause deformation of products is provided.

The technical solution of the utility model is: eccentric wheel is loaded on pull bar top; Nut is equipped with in the pull bar bottom; Be set with on the pull bar on nut top through the eccentric wheel extruding and produce deformation with the rubber sleeve of sealing hole.

Be set with pad on the pull bar at two ends about the described rubber sleeve.

Described eccentric wheel is provided with handle.

The ratio (eccentric wheel characteristic) of described eccentric diameter D and eccentric throw d is 14 ~ 20.

Described pull bar top is provided with U-lag, and eccentric wheel is loaded in the U-lag.

The degree of depth of described U-lag is more than or equal to eccentric radius R and eccentric throw d sum; Described R=D/2.

The utility model is simple in structure, and is easy to make, with low cost, and usable range is wide, can come the hole of sealed diameter between 8～50mm by changing the sealing shroud external diameter.

Description of drawings

Fig. 1 is the structural representation of thin-wall box body class aluminum alloy part.

Fig. 2 is thin-wall box body class aluminum alloy part distressed structure synoptic diagram after compressing.

Fig. 3 is structural representation of the present utility model.

Fig. 4 is use view of the present utility model.

Among the figure, 1, eccentric wheel, 2, pull bar, 3, pad, 4, rubber sleeve, 5, nut.

Embodiment

Among Fig. 3,4, the utility model is inserted in the end face hole, with rotatable handle eccentric wheel 1, by the variation of rotation center to the seal face distance, move on the pull bar 2, rubber sleeve 4 is owing to be subjected to force compresses to produce elastic deformation, and the end face hole of workpiece is sealed up, thereby prevented the distortion of product, nut 5 and pad 3 can be adjusted the predeformation amount of rubber sleeve.

The eccentric eccentric wheel characteristic of the utility model (being the ratio of eccentric diameter and eccentric throw) can realize that like this any point can both self-locking on the eccentric wheel circumference between 14 ~ 20.Eccentric diameter D=35mm among the figure, eccentric throw d=2mm.

The utility model can only the product of sealing load below 0.4MPA, can not be used for high pressure, and can not face toward the people in the process of using, and prevents from that air pressure from suddenling change the utility model is gone out.

Claims

1. hole packoff that is used for air-tight test, it is characterized in that: eccentric wheel (1) is loaded on pull bar (2) top; Nut (5) is equipped with in pull bar (2) bottom; Be set with on the pull bar (2) on nut (5) top through eccentric wheel (1) extruding and produce deformation with the rubber sleeve (4) of sealing hole.

2. the hole packoff for air-tight test according to claim 1, it is characterized in that: described rubber sleeve (4) is set with pad (3) on the pull bar at two ends (2) up and down.

3. the hole packoff for air-tight test according to claim 1, it is characterized in that: described eccentric wheel (1) is provided with handle.

4. the hole packoff for air-tight test according to claim 1, it is characterized in that: the diameter D of described eccentric wheel (1) and the ratio of eccentric throw d are 14 ~ 20.

5. the hole packoff for air-tight test according to claim 1, it is characterized in that: described pull bar (2) top is provided with U-lag, and eccentric wheel (1) is loaded in the U-lag.

6. the hole packoff for air-tight test according to claim 5, it is characterized in that: the degree of depth of described U-lag is more than or equal to eccentric wheel (1) radius R and eccentric throw d sum.