CN105241613A

CN105241613A - Self-expandable airtight tool

Info

Publication number: CN105241613A
Application number: CN201510694488.7A
Authority: CN
Inventors: 许卫民; 朱庆根
Original assignee: 上海汽车空调配件有限公司
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2016-01-13
Also published as: CN105241613B

Abstract

The invention discloses a self-expandable airtight tool. The self-expandable airtight tool comprises calipers and a body which is arranged in the jaw of the calipers. The self-expandable airtight tool is characterized in that a bayonet is arranged on the front end of the jaw of the calipers; a tested pipeline platen mounting space is between the body and the bayonet; two plunger chambers are arranged in the body; the openings of the plunger chambers face the tested pipeline platen mounting space; a plunger is arranged in each plunger chamber; a plunger can carry out reciprocating motion in a chamber; a plunger spring is arranged between the inner end of a plunger and a plunger chamber; the outer end of each plunger extends out of the body; the outside of each plunger is sealed; and the inside spaces of the plungers of two plunger chambers in the body are communicated. The self-expandable airtight tool has the advantages that automatic sealing is realized; the product processing speed is improved; product detection consistency is ensured; and industrial accidents are prevented in production.

Description

A kind of self expansion airtight fixture

Technical field

The present invention relates to the detection field of various pipeline leakage, specifically a kind of pipeline utilizes and detects the self expansion airtight fixture that medium (gas) pressure makes connection frock generation sealing.

Background technology

The joint of manufacturing enterprise to the Leak Detection connecting pipeline of axial seal mat structure of current pipeline does not have reliable scheme, main by complicated tool structure, force external force, sealing is produced after point of attachment is squeezed, there is many drawbacks like this, as: 1. product is subject to external force excessive and distortion and even inefficacy, affects product quality; 2. during Product processing because mechanism is too complicated, assembly difficulty increase, thus production efficiency is not high; 3. during Product processing, people's safe reliability is poor.

Summary of the invention

One object of the present invention is to provide a kind of self expansion airtight fixture, realize utilizing and detect medium (mainly gas) pressure, promote plunger press seal pad, realize naturally sealing of point of attachment, simplify mounting means, improve process velocity, ensure product not by the impact that strong external force produces.

To achieve these goals, technical scheme of the present invention is: a kind of self expansion airtight fixture, comprise clamp, be arranged on the main body in caliper jaw, it is characterized in that the jaw front end of clamp arranges bayonet socket, tested pipeline pressing plate installing space is left between main body and bayonet socket, two plunger chamber are set in main body, described plunger chamber opening is towards tested pipeline pressing plate installing space, in described plunger chamber, plunger is set, plunger can move reciprocatingly in chamber, between plunger the inner and plunger chamber, plunger spring is set, main body is stretched out in plunger outer end, plunger forms sealing outward, in described main body, the plunger inner space of two plunger chamber is communicated with.

Described plunger outer end arranges depressed part, and through hole is set in described plunger, described through hole extends to plunger the inner from described depressed part, tested pipeline pressing plate is provided with two mouths of pipe protruded, and one of them mouth of pipe connects draft tube, and another mouth of pipe connects escape pipe, outside described two mouths of pipe protruded, sealing gasket is set, described two mouths of pipe protruded stretch in the depressed part of plunger, and are communicated with the through hole in described plunger, and described plunger outer end contacts with the sealing gasket protruded outside the mouth of pipe.

At assembling stage, open clamp front end bayonet socket, plunger extension is inserted in pressing plate along the protrusion mouth of pipe on tested pipeline pressing plate, tested pressing plate and plunger contact, overcome the acting force of plunger spring, make plunger moves, pressing plate is pushed in clamp bayonet socket, clamp are restored closed, locked frock and pressing plate.

At airtight test phase, the gas entered from draft tube enters plunger inner space, and this pressure produces thrust to plunger base together with spring force, acts on the sealing gasket of pressing plate eventually through plunger, produce the distortion of sealing gasket, after air pressure reaches test pressure, produce the sealing at this position.

The method of operating of described self expansion airtight fixture, it is characterized in that this method of operating comprises the assembling stage gentle density test stage, in assembling stage, open clamp front end bayonet socket, plunger extension is inserted in pressing plate along the protrusion mouth of pipe on tested pipeline pressing plate, arrange sealing gasket outside tested pipeline pressing plate epirelief outlet spout, plunger front end contacts with described sealing gasket, overcomes the acting force of plunger spring, make plunger moves, pressing plate is pushed in clamp bayonet socket, restores closed, locked frock and pressing plate;

At airtight test phase, gas is by the protrusion mouth of pipe on tested pipeline pressing plate, and enter plunger chamber through the through hole be arranged in plunger, gaseous tension and plunger spring elastic force one react on plunger the inner, by plunger by this force transmission on the sealing gasket of plunger front end, sealing gasket produce distortion, when gaseous tension reaches detected pressures, the distortion of sealing gasket is enough between sealing clamp and chamber, can carry out leak detection work.

The pressure of the present invention by producing the examined gas of frock self, automatically produces and detects to pipeline the sealing needed, reach improve Product checking effect and simplify the internal structure of an organization, cost-saving object.The invention has the advantages that and can realize automatic-sealed, improve the process velocity of product, ensure the consistance of Product checking, avoid the industrial accident in producing to occur simultaneously.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is action schematic diagram of the present invention.

Embodiment

As shown in the figure, a kind of self expansion airtight fixture, comprise clamp 6, be arranged on the main body 1 in caliper jaw, it is characterized in that the jaw end of clamp arranges bayonet socket 2, tested pipeline pressing plate installing space 3 is left between main body 1 and bayonet socket 2, two plunger chamber are set in main body 1, described plunger chamber opening is towards tested pipeline pressing plate installing space 3, plunger 4 is set in described plunger chamber, plunger 4 can move reciprocatingly in chamber, between plunger 4 the inner and plunger chamber, plunger spring 5 is set, main body 1 is stretched out in plunger 4 outer end, plunger 4 overcoat O type circle 7 forms sealing, plunger 4 inner space of interior two plunger chamber of described main body 1 is communicated with, and be connected with draft tube.

Described plunger 4 outer end arranges depressed part, and through hole 8 is set in described plunger 4, described through hole 8 extends to plunger the inner from described depressed part, tested pipeline pressing plate 9 is provided with two mouths of pipe 10 protruded, one of them mouth of pipe connects draft tube, another mouth of pipe connects escape pipe, outside described two mouths of pipe 10 protruded, sealing gasket 11 is set, described two mouths of pipe 10 protruded stretch in the depressed part of plunger, and be communicated with the through hole 8 in described plunger, described plunger 4 outer end contacts with the sealing gasket 11 protruded outside the mouth of pipe.

According to a particular embodiment of the invention, the upper end of main body 1 arranges a projection, described projection is provided with two fixed bearing pin-and-holes and two clamp spring base holes, for connection clamp 6 and clamp spring 13, described clamp comprise two calipers being arranged on main body 1 both sides, main body 1 is connected with the clamp caliper being arranged on main body 1 both sides by the pin 12 in fixed bearing pin-and-hole, and arranges clamp spring 13 between main body 1 and clamp caliper.

According to a particular embodiment of the invention, middle part and the main body 1 of described clamp are rotationally connected, and the end of clamp 8 is provided with bayonet socket 2, and for locked pipeline pressing plate, the root of clamp is then for hand-held and operate folding.

According to a particular embodiment of the invention, main body 1 inside loads plunger 4, and be lined with plunger spring 5 between plunger 4 the inner and plunger chamber, put O type circle 7, and mate with plunger chamber internal diameter outside plunger 2, form sealing, main body 1 is stretched out in plunger 4 outer end.Because plunger is in active state, outside plunger, in this design, install O type circle additional, to keep the sealing of chamber, thus made the stable of detection air pressure.

According to a particular embodiment of the invention, the outer diameter of described plunger is less than inner diameter, forms limited step in plunger side, the front end of main body 1 installs the cover plate 14 matched with described limited step additional, with capping main body 1, form conducting chamber, cover plate 14 is provided with flat mouth screw and is connected with main body.

By the effect of plunger spring and capping, plunger is upper under non-detected state, and clamp normality position is then locked position.

When detecting without pipeline, clamp 6, by the effect of clamp spring 13 elastic force, close automatically, and plunger 4 is by the effect of plunger spring 5 elastic force, and limited step top is to cover plate 14, and fore-end stretches out cover plate 14.

This self expansion airtight fixture divides assembling and inflation two processes in use procedure, assembling stage, hand pinches clamp 6 rear portion, makes it sell connection of rotating, open clamp 6 front end bayonet socket, plunger extension is inserted in pressing plate along the protrusion mouth of pipe on tested pipeline pressing plate, makes the described protrusion mouth of pipe enter plunger depressed part, then overcome the acting force of plunger spring 5, make plunger 4 moves, pressing plate is pushed in clamp 6 bayonet socket, restores closed, locked frock and pressing plate.

At airtight test phase, gas enters from draft tube, and the protrusion mouth of pipe successively on tested pipeline pressing plate, the through hole be arranged in plunger enter plunger chamber, O type circle 7 is airtight chamber, gaseous tension and plunger spring 5 elastic force one react on plunger 2 back, and by this force transmission on the sealing gasket of plunger 4 front end, sealing gasket produces distortion, when gaseous tension reaches detected pressures, the distortion of sealing gasket is enough between sealing clamp and chamber, can carry out leak detection work.

According to a particular embodiment of the invention, product pressing plate is double connection mouth structure, and the action in position, right side and left side is completely the same, no longer repeated description.

Claims

1. a self expansion airtight fixture, comprise clamp, be arranged on the main body in caliper jaw, it is characterized in that the jaw front end of clamp arranges bayonet socket, tested pipeline pressing plate installing space is left between main body and bayonet socket, two plunger chamber are set in main body, described plunger chamber opening is towards tested pipeline pressing plate installing space, in described plunger chamber, plunger is set, plunger can move reciprocatingly in chamber, between plunger the inner and plunger chamber, plunger spring is set, main body is stretched out in plunger outer end, plunger forms sealing outward, in described main body, the plunger inner space of two plunger chamber is communicated with.

2. self expansion airtight fixture as claimed in claim 1, it is characterized in that described plunger outer end arranges depressed part, and through hole is set in described plunger, described through hole extends to plunger the inner from described depressed part, tested pipeline pressing plate is provided with two mouths of pipe protruded, one of them mouth of pipe connects draft tube, another mouth of pipe connects escape pipe, outside described two mouths of pipe protruded, sealing gasket is set, described two mouths of pipe protruded stretch in the depressed part of plunger, and be communicated with the through hole in described plunger, described plunger outer end contacts with the sealing gasket protruded outside the mouth of pipe.

3. self expansion airtight fixture according to claim 1, it is characterized in that: the outer diameter of described plunger is less than inner diameter, limited step is formed in plunger side, the front end of main body installs the cover plate matched with described limited step additional, with capping main body, cover plate is provided with flat mouth screw and is connected with main body.

4. self expansion airtight fixture according to claim 1, is characterized in that its method of operating comprises the assembling stage gentle density test stage;

In assembling stage, open clamp front end bayonet socket, plunger extension is inserted in pressing plate along the protrusion mouth of pipe on tested pipeline pressing plate, arrange sealing gasket outside tested pipeline pressing plate epirelief outlet spout, plunger front end contacts with described sealing gasket, overcomes the acting force of plunger spring, make plunger moves, pressing plate is pushed in clamp bayonet socket, restores closed, locked frock and pressing plate;