CN105334006B - A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components - Google Patents
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components Download PDFInfo
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- CN105334006B CN105334006B CN201410399071.3A CN201410399071A CN105334006B CN 105334006 B CN105334006 B CN 105334006B CN 201410399071 A CN201410399071 A CN 201410399071A CN 105334006 B CN105334006 B CN 105334006B
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- metal tube
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- sealing seat
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Abstract
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components, including sealing seat and more hollow tubes, a mounting groove is provided with the middle part of sealing seat, more hollow tube fixations are in this mounting groove, the head of each hollow tube is welded with a metal tube for being in form of annular rings, the inside and outside wall of metal tube is smooth wall, just will directly stopper one end of metal tube during the hollow seal of tube using rubber stopper.This improvement is not only more convenient in the making of metal tube, but also saves nut and sealing ring.The use of rubber stopper both saved raw material, save the substantial amounts of working time consuming labour, and the sealing effect of hollow tube is also fine, and work efficiency is obviously improved.
Description
Technical field
The present invention relates to the apparatus field of gas cylinder leakage detection apparatus, and in particular to a kind of gas-liquid being used for LNG mounted gas cylinders
The device that seal assembly is hunted leak.
Background technology
LNG is the english abbreviation of liquefied natural gas, is to be cooled to -162 DEG C by gaseous natural gas under normal pressure, is allowed to
Condense into liquid.LNG is favored because being the energy of cleaning and economy by more and more oversize vehicle factories.In recent years, LNG
The market demand of vehicle-mounted insulated gas cylinder is growing day by day.The manufacturing process requirement of vehicle-mounted insulated gas cylinder is stringent, and the requirement of most critical is
Ensure that cryogenic liquid has as far as possible low Daily boil-off-rate, sufficiently long period of storage.To realize this requirement, insulated gas cylinder is necessary
There is good heat-proof quality.Insulated gas cylinder is assembled by liner and outer barrel, has interlayer, low temperature between liner and outer barrel
The heat-proof quality of insulated gas cylinder realized by being vacuumized in advance to interlayer, interlayer vacuum it is high or it is low directly determine it is low
The storage time of geothermal liquid, the more high then heat insulation of heat-insulated vacuum is better, and the storage time of cryogenic liquid is longer, in order to realize
The high vacuum of interlayer, it is important to ensure two important process：First, letting out for cryogenic insulated cylinder is ensured by air-leakage test
Leak rate is very low, second, being vented for a long time to interlayer by Special vacuum exhaust equipment, high vacuum is established in interlayer.Usually the former
It is more crucial, because not detected if any leakage, the failure accident that even substandard products dispatch from the factory of subsequent exhaust process can be directly contributed.
At present, air-leakage test is divided into high pressure detection and helium Mass Spectrometer Method, the former is Rough Inspection, and the latter examines for essence.Make
By the use of helium mass spectrum as the hollow duct occlusion that seat need to will be sealed during detection method, traditional closing mode is in the gold of hollow pipe end
Belong to pipe and be internally provided with screw thread, then air-tight manner is that will be screwed in the supporting nut of this screw thread inside metal tube so as to close metal
Pipe.Because a sealing seat is provided with more metal tubes, therefore is operated using this mode and not only waste raw material but also lavish labor on, more
Add the time for wasting labourer, be unfavorable for the quick progress of leak detection operation.
The above problem should be given during the design and use to the leakage detection apparatus of LNG mounted gas cylinder gas-liquid sealing components
To consider and solve the problems, such as.
The content of the invention
For above-mentioned problem, the present invention provides a kind of leak detection for LNG mounted gas cylinder gas-liquid sealing components and fills
Put.
The present invention technical solution be：A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components, including
Seat and more hollow tubes are sealed, a mounting groove is provided with the middle part of the sealing seat, the more hollow tubes are fixed pacifies herein
In tankage, the head of each hollow tube is welded with a metal tube for being in form of annular rings, and the middle part of the metal tube is upper and lower
The cavity of perforation, the inside and outside wall of the metal tube is smooth wall.
Further improvement of the present invention is：One end port of the metal tube is sealed using the desk-top rubber stopper of rounding
Close.
Further improvement of the present invention is：The sealing seat is located at the envelope in back-off hat type shape, the hollow tube
The inside of mouth seat, for the mounting groove positioned at the middle position of the sealing seat, the mounting groove penetrates the sealing seat installation.
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components of the invention, by the gold of each hollow pipe end
Belong to tube opening position to be clogged with rubber stopper, can use and a small amount of vacuum silicon grease is smeared on rubber stopper to be further ensured that hollow tube
Sealing.Sealing seat is welded on insulated gas cylinder, and the gas cylinder that need to be hunted leak passes through hose and vacuum pumping tool equipment and leak detection forvacuum system
System connection, is hunted leak using leak detector, when the leak rate stabilization shown on leak detector is in ＜ 5 × 10-9Pa·m3During/S, helium is used
Sprayed around weld seam, leak detector is not alarmed and the numerical value of leak rate does not change, then the sealing effect of this gas cylinder is up to specification.
The beneficial effects of the invention are as follows：The present invention will be disposed as smooth plane inside and outside the metal tube of hollow tube, by
Just one end of metal tube is directly stoppered when blank pipe seals using rubber stopper.Traditional sealing tightened using nut is abandoned
Mode, it is not only more convenient in the making of metal tube, but also save nut and sealing ring.Original is both saved in the use of rubber stopper
Expect, save the labour of the consuming of substantial amounts of working time, and the sealing effect of hollow tube is also fine, airtight test
Time greatly shortens, and work efficiency is obviously improved.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components of the invention.
Wherein, 1- seals seat, 2- hollow tubes, 3- mounting grooves, 4- metal tubes, 5- rubber stoppers.
Embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
State, which is only used for explaining the present invention, and protection scope of the present invention is not formed and is limited.
As shown in Figure 1, the present embodiment provides a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components, including
Seat 1 and Duo Gen hollow tubes 2 are sealed, is preferably 3, the middle part of the sealing seat 1 is provided with a mounting groove 3, during more described
Blank pipe 2 is fixed in this mounting groove 3, and the head of each hollow tube 2 is welded with a metal tube 4 for being in form of annular rings, described
The middle part of metal tube 4 is the cavity of up/down perforation, and the inside and outside wall of the metal tube 4 is smooth wall.The metal tube 4
One end port closed using the desk-top rubber stopper 5 of rounding.The sealing seat 1 is in back-off hat type shape, the hollow tube 2
Positioned at the inside of the sealing seat 1, the mounting groove 3 is penetrated positioned at the middle position of the sealing seat 1, the mounting groove 3
The sealing seat 1 is installed.
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components of the present embodiment, by each 2 termination of hollow tube
4 opening rubber stopper 5 of metal tube clogs, and can use during a small amount of vacuum silicon grease is smeared on rubber stopper 5 to be further ensured that
The sealing of blank pipe 2.Sealing seat 1 is welded on insulated gas cylinder, and the gas cylinder that need to be hunted leak is pre- by hose and vacuum pumping tool equipment and leak detection
Pumped vacuum systems connects, and is hunted leak using leak detector, when the leak rate stabilization shown on leak detector is in ＜ 5 × 10-9Pa·m3/S
When, sprayed with helium around weld seam, leak detector is not alarmed and the numerical value of leak rate does not change, then the sealing effect symbol of this gas cylinder
Close specification.
The beneficial effect of the present embodiment is：The present invention will be disposed as smooth plane inside and outside the metal tube of hollow tube, will
Just one end of metal tube is directly stoppered during the hollow seal of tube using rubber stopper.Abandoned it is traditional tightened using nut it is close
Envelope mode, it is not only more convenient in the making of metal tube, but also save nut and sealing ring.The use of rubber stopper was both saved
Raw material, save the substantial amounts of working time consuming labour, and the sealing effect of hollow tube is also fine, airtight test
Time greatly shorten, work efficiency is obviously improved.
Claims (1)
- A kind of 1. leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components, it is characterised in that：Including sealing seat（1）With it is more Root hollow tube（2）, in the sealing seat（1）Middle part be provided with a mounting groove（3）, the more hollow tubes（2）Fix herein Mounting groove（3）It is interior, each hollow tube（2）Head be welded with one be in form of annular rings metal tube（4）, the metal tube （4）Middle part be up/down perforation cavity, the metal tube（4）Inside and outside wall be smooth wall, the metal tube（4）'s One end port is using the desk-top rubber stopper of rounding（5）Closed, the sealing seat（1）It is described hollow in back-off hat type shape Pipe（2）Positioned at the sealing seat（1）Inside, the mounting groove（3）Positioned at the sealing seat（1）Middle position, the peace Tankage（3）Penetrate the sealing seat（1）Installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399071.3A CN105334006B (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399071.3A CN105334006B (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105334006A CN105334006A (en) | 2016-02-17 |
| CN105334006B true CN105334006B (en) | 2018-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410399071.3A Active CN105334006B (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing components |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201083590Y (en) * | 2007-09-06 | 2008-07-09 | 中国核动力研究设计院 | High-temperature high pressure helium-leakage detecting apparatus |
| CN101886966A (en) * | 2009-06-26 | 2010-11-17 | 刘安平 | Helium mass spectrum leak detection fixture for tube plate welding seams of evaporator |
| CN103471780A (en) * | 2013-08-27 | 2013-12-25 | 宁波明欣化工机械有限责任公司 | System and method for detecting welding seam of end cover of sealed container |
| CN203413351U (en) * | 2013-08-11 | 2014-01-29 | 沈阳斯林达安科新技术有限公司 | Vacuumizing sealing device for LNG (liquefied natural gas) bottle |
| CN204064575U (en) * | 2014-08-14 | 2014-12-31 | 丹阳市利旺车辆部件有限公司 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly |
-
2014
- 2014-08-14 CN CN201410399071.3A patent/CN105334006B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201083590Y (en) * | 2007-09-06 | 2008-07-09 | 中国核动力研究设计院 | High-temperature high pressure helium-leakage detecting apparatus |
| CN101886966A (en) * | 2009-06-26 | 2010-11-17 | 刘安平 | Helium mass spectrum leak detection fixture for tube plate welding seams of evaporator |
| CN203413351U (en) * | 2013-08-11 | 2014-01-29 | 沈阳斯林达安科新技术有限公司 | Vacuumizing sealing device for LNG (liquefied natural gas) bottle |
| CN103471780A (en) * | 2013-08-27 | 2013-12-25 | 宁波明欣化工机械有限责任公司 | System and method for detecting welding seam of end cover of sealed container |
| CN204064575U (en) * | 2014-08-14 | 2014-12-31 | 丹阳市利旺车辆部件有限公司 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly |
Non-Patent Citations (1)
| Title |
|---|
| 发电机氢气泄漏的防治措施;张国标;《广西电业》;20051231;全文 * |
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|---|---|
| CN105334006A (en) | 2016-02-17 |
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Address after: No. 19 Fuping Road, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee after: Danyang Liwang Vehicle Parts Co.,Ltd. Address before: Xin Qiao Zhen Gu Xiang Cun, Danyang City, Zhenjiang City, Jiangsu Province, 212322 Patentee before: DANYANG LIWANG AUTO PARTS Co.,Ltd. |