CN201540188U

CN201540188U - Air-tightness detection tool

Info

Publication number: CN201540188U
Application number: CN2009202087907U
Authority: CN
Inventors: 朱春平
Original assignee: SHANGHAI BAIYOUDE MECHANICAL EQUIPMENT CO Ltd
Current assignee: SHANGHAI BAIYOUDE MECHANICAL EQUIPMENT CO Ltd
Priority date: 2009-09-01
Filing date: 2009-09-01
Publication date: 2010-08-04
Anticipated expiration: 2019-09-01

Abstract

The utility model relates to a detection device, and provides an air-tightness detection tool, which comprises a piston cylinder, a piston rod, an end cover and a stop block, wherein, the two ends of the piston cylinder are opened; the upper end is connected through screws by the end cover; the lower end allows the piston rod to pass through directly; the pore diameter at the lower end is slightly larger than the diameter of the piston rod; a through hole is formed inside the piston rod; high pressure gas is filled in a fire extinguisher body, flows into a working air cavity through a gap between the piston cylinder and the piston rod, and pushes the piston rod to move; and the stop block is hinged at the bottom of the piston rod. Compared with the prior art, the utility model can rapidly and accurately detect the air-tightness.

Description

Impermeability detects frock

Technical field

The utility model relates to a kind of pick-up unit, relates in particular to a kind of sealing or bubble-tight detection frock.

Background technology

The impermeability detection is a necessary step after flame snuffer, water tank, the welding of gas container equal pressure container, also is an important assurance that improves reliabilities such as flame snuffer, water tank, gas container.Therefore, how rapidly and efficiently go that to detect such pressure vessel just most important.

Detection method commonly used now is with being threaded sealing detection frock and flame snuffer to be sealed earlier, then pressed gas is injected in the flame snuffer, then flame snuffer is put into water, and whether observe has bubble to overflow.Yet this context of detection is consuming time oversize in the installation and removal link that is threaded, and greatly reduces production efficiency.

The utility model then provides a kind of new detection frock in order to improve or to solve the above problems.

The utility model content

The technical problems to be solved in the utility model provides a kind of impermeability detection frock that can accurately judge the hermetic seal situation.

The utility model solves above-mentioned technical matters by such technical scheme:

A kind of impermeability detects frock, it comprises piston cylinder, piston rod, end cap, block, the piston cylinder both ends open, the upper end is threaded with end cap, and the lower end directly allows piston rod pass through, and the aperture of lower end is than the slightly larger in diameter of piston rod, there is through hole piston rod inside, and gases at high pressure are injected in the flame snuffer bottle, and gases at high pressure flow into the work air cavity by the gap between piston cylinder and the piston rod again, promote piston rod movement, block is arranged in the bottom-hinged of piston rod.

As a kind of improvement, impermeability detects frock and flame snuffer bottle junction is provided with " O " RunddichtringO.

As a kind of improvement, be provided with " O " RunddichtringO between piston rod and the piston cylinder.

As a kind of improvement, gapped between piston rod and the piston cylinder diapire, this gap communicates with the work air cavity.

Compared with prior art, the utlity model has following advantage: can judge whether hermetic seal quickly and efficiently.

Description of drawings

Fig. 1 is the diagrammatic cross-section that the utility model impermeability detects frock.

Fig. 2 is the synoptic diagram that the utility model impermeability detects frock winding container to be tested, is in state to be tested this moment.

Fig. 3 is the synoptic diagram that the utility model impermeability detects frock winding container to be tested, is in inflated condition this moment.

Embodiment

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Please join Fig. 1, the utility model impermeability detects frock 10, be mainly used in container, as the airtight detection of flame snuffer, water tank, gas container etc., it mainly comprises piston cylinder 11, piston rod 12, end cap 13, block 14, piston cylinder 11 is provided with chamber 110, the equal opening in piston cylinder 11 two ends, the upper end open thread seal of end cap 13, diapire 111 is extended in the lower end, gapped between diapire 111 and the piston rod 12, like this can be so that the pressed gas in the fire extinguisher bottle body enters the work air cavity.

Piston rod 12 is provided with piston rod packing feature 121 in the middle, and is provided with through hole in the piston rod 12 as gas channel 122.After piston rod 12 and piston cylinder 11 windings, piston rod packing feature 121 is in chamber 110, the through hole of end cap 13 and diapire 111 is exposed at two ends respectively, piston rod packing feature 121 adopts the sealing of " O " RunddichtringO with the inwall of piston cylinder 11, and forms work air cavity 113 between piston rod packing feature 121 and the diapire 111.In addition, gapped between the diapire 111 of piston rod 12 and piston cylinder 11, that is, and gas channel 122 and the structure of working and communicating for gas between the air cavity 113.Piston rod 12 connects block 14 at the end that it exposes diapire 111, and is hinged between this block 14 and the piston rod 12, that is, and and block 14 piston rod 12 rotations relatively.

Please join Fig. 2, with the end that expose diapire 111 of container 20 windings to be tested to piston rod 12, and block 14 be put into container 20 cavitys, the other end that exposes end cap 13 of piston rod 12 connects pressed gas.The length of block 14 must because block 14 can rotate, therefore can enter in the container cavity greater than the diameter of the bottleneck of container 20 more conveniently.

Please join Fig. 2, pressed gas is started working in the process, the figure acceptance of the bid shows the circulation path (arrow points) of gas, gas transfers in container 20 cavitys from the gas channel 122 of piston rod 12, and portion gas can transfer in the work air cavity 113 from the gap between the diapire 111 of piston rod 12 and piston cylinder 11.In view of having the gap between piston rod 12 and the diapire 111, therefore, the upper surface of work air cavity 113, promptly, the area S1 of the one side that piston rod packing feature 121 and diapire 111 are relative is greater than the area S2 of diapire 111, according to pressure formula F=PS, so, the pressure that the pressure that the S1 surface is subjected to is subjected to greater than the S2 surface, so just make piston rod 12 move up, move up thereby drive block 14, in block 14 moved up process, block 14 can be because the rotation of the cause of pressure, and its most stable position is exactly a horizontal level, because its length is greater than the width of vessel port, therefore can barrier in container, be connected on the diapire 111 up to the openend of container.Along with the increase of air pressure, sealing load also can be increasing.

Whether need this moment to detect bubble-tight words, directly container is put in the water or in other liquid, checking has bubble to overflow.

In order to increase the sealing between container open end and the diapire 111, but between increases " O " RunddichtringO 30.

The detection frock that adopts the utility model to provide can be so that internal tank gassy to be tested and keep certain pressure, and it is more accurate that impermeability detects, and the time of installation and removal shorten greatly, improved work efficiency.

The above only is a better embodiment of the present utility model; protection domain of the present utility model does not exceed with above-mentioned embodiment; as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.

Claims

1. an impermeability detects frock, it comprises piston cylinder, piston rod, end cap, block, the piston cylinder both ends open is characterized in that: the upper end is threaded with end cap, and the lower end directly allows piston rod pass through, and the aperture of lower end is than the slightly larger in diameter of piston rod, there is through hole piston rod inside, and gases at high pressure are injected in the flame snuffer bottle, and gases at high pressure flow into the work air cavity by the gap between piston cylinder and the piston rod again, promote piston rod movement, block is arranged in the bottom-hinged of piston rod.

2. impermeability according to claim 1 detects frock, it is characterized in that: impermeability detects frock and flame snuffer bottle junction is provided with " O " RunddichtringO.

3. impermeability according to claim 1 and 2 detects frock, it is characterized in that: be provided with " O " RunddichtringO between piston rod and the piston cylinder.

4. impermeability according to claim 1 and 2 detects frock, it is characterized in that: gapped between piston rod and the piston cylinder diapire, this gap communicates with the work air cavity.