CN204064575U - A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly - Google Patents
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly Download PDFInfo
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- CN204064575U CN204064575U CN201420456389.6U CN201420456389U CN204064575U CN 204064575 U CN204064575 U CN 204064575U CN 201420456389 U CN201420456389 U CN 201420456389U CN 204064575 U CN204064575 U CN 204064575U
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- metal tube
- sealing seat
- gas cylinder
- detection apparatus
- mounting groove
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Abstract
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly, comprise sealing seat and many hollow tubes, the middle part of sealing seat is provided with a mounting groove, many hollow tubes are fixed in this mounting groove, the head of each hollow tube is welded with the metal tube that is form of annular rings, the inside and outside wall of metal tube is smooth wall, just directly adopts one end of rubber plug jam-pack metal tube just can when being sealed by hollow tube.This improvement is not only convenient in the making of metal tube, and saves nut and O-ring seal.The use of rubber plug both conservation, save the labour expended of a large amount of working times, and the sealing effectiveness of hollow tube is also fine, and work efficiency obtains obvious lifting.
Description
Technical field
The utility model relates to the apparatus field of gas cylinder leakage detection apparatus, is specifically related to a kind of device for hunting leak to the gas-liquid sealing assembly of LNG mounted gas cylinder.
Background technology
LNG is the english abbreviation of liquefied natural gas (LNG), is to be cooled to-162 DEG C by the rock gas of gaseous state at ambient pressure, makes it to condense into liquid.LNG because be clean and the energy of economy, favor by increasing oversize vehicle factory.In recent years, the market demand of the vehicle-mounted insulated gas cylinder of LNG grows with each passing day.The manufacture process of vehicle-mounted insulated gas cylinder requires strict, and the requirement of most critical will ensure that cryogenic liquid has as far as possible low Daily boil-off-rate, sufficiently long period of storage.For realizing this requirement, insulated gas cylinder must have good heat-proof quality.Insulated gas cylinder is assembled by inner bag and urceolus, between inner bag and urceolus, there is interlayer, the heat-proof quality of cryogenic insulated cylinder realizes by vacuumizing in advance interlayer, interlayer the vacuum high or low storage time directly determining cryogenic liquid, the higher then effect of heat insulation of heat insulation vacuum tightness is better, the storage time of cryogenic liquid is longer, in order to realize the high vacuum of interlayer, key to guarantee two important process: one is guarantee that the slip of cryogenic insulated cylinder is very low by air-leakage test, two is be vented interlayer for a long time by Special vacuum exhaust equipment, high vacuum is set up in interlayer.Usually the former is more crucial, because do not detect if any leakage, directly can cause the accident that the failed even substandard products of follow-up exhaust process dispatch from the factory.
At present, air-leakage test is divided into high pressure to detect and helium Mass Spectrometer Method, and the former is Rough Inspection, and the latter is essence inspection.The hollow tube of sealing seat need be closed as during detection method using helium mass spectrum, traditional closed mode is that the metal tube inside of hollow tube termination is provided with screw thread, then air-tight manner is that nut supporting for screw thread is therewith screwed in metal tube inside thus closed metal pipe.Because a sealing seat is provided with many metal tubes, therefore adopts this mode to operate and not only waste raw material but also lavish labor on, more waste the time of laborer, what be unfavorable for that leak detection operates carries out fast.
The problems referred to above should be paid attention to and the problem solved in the design and use process of the leakage detection apparatus of LNG mounted gas cylinder gas-liquid sealing assembly.
Utility model content
For above-mentioned Problems existing, the utility model provides a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly.
Technical solution of the present utility model is: a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly, comprise sealing seat and many hollow tubes, the middle part of described sealing seat is provided with a mounting groove, many described hollow tubes are fixed in this mounting groove, the head of each described hollow tube is welded with the metal tube that is form of annular rings, the middle part of described metal tube is the cavity of up/down perforation, and the inside and outside wall of described metal tube is smooth wall.
Further improvement of the utility model is: one end port of described metal tube adopts the desk-top rubber stopper of rounding to close.
Further improvement of the utility model is: described sealing seat is back-off hat type shape, and described hollow tube is positioned at the inside of described sealing seat, and described mounting groove is positioned at the middle position of described sealing seat, and described mounting groove penetrates described sealing seat and installs.
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly of the utility model, clogs the metal tube opening rubber stopper of each hollow tube termination, can adopt and smear a small amount of vacuum silicon grease to ensure the sealing of hollow tube further on rubber stopper.Sealing seat is welded on insulated gas cylinder, and the gas cylinder that need hunt leak is connected with leak detection forvacuum system by flexible pipe and vacuum pumping tool equipment, adopts leak locator to hunt leak, when the leak rate that leak locator shows is stabilized in < 5 × 10
-9pam
3during/S, spray around weld seam with helium, leak locator is not reported to the police and the numerical value of leak rate does not change, then the sealing effectiveness of this gas cylinder is up to specification.
The beneficial effects of the utility model are: the utility model is all set to smooth plane by inside and outside the metal tube of hollow tube, just directly adopt one end of rubber plug jam-pack metal tube just can when being sealed by hollow tube.Abandon the sealing means of traditional employing nut screwing clamping, not only convenient in the making of metal tube, and save nut and O-ring seal.The use of rubber plug both conservation, save the labour expended of a large amount of working times, and the sealing effectiveness of hollow tube is also fine, and the time of airtight test shortens greatly, and work efficiency obtains obvious lifting.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly of the utility model.
Wherein, 1-seals seat, 2-hollow tube, 3-mounting groove, 4-metal tube, 5-rubber stopper.
Embodiment
In order to deepen, to understanding of the present utility model, to be described in further detail the utility model below in conjunction with drawings and Examples, this embodiment, only for explaining the utility model, not forming protection domain of the present utility model and limiting.
As shown in Figure 1, the present embodiment provides a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly, comprise sealing seat 1 and Duo Gen hollow tube 2, be preferably 3, the middle part of described sealing seat 1 is provided with a mounting groove 3, and many described hollow tubes 2 are fixed in this mounting groove 3, and the head of each described hollow tube 2 is welded with the metal tube 4 that is form of annular rings, the middle part of described metal tube 4 is the cavity of up/down perforation, and the inside and outside wall of described metal tube 4 is smooth wall.One end port of described metal tube 4 adopts the desk-top rubber stopper 5 of rounding to close.Described sealing seat 1 is in back-off hat type shape, and described hollow tube 2 is positioned at the inside of described sealing seat 1, and described mounting groove 3 is positioned at the middle position of described sealing seat 1, and described mounting groove 3 penetrates described sealing seat 1 and installs.
A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly of the present embodiment, clogs the metal tube 4 opening rubber stopper 5 of each hollow tube 2 termination, can adopt and smear a small amount of vacuum silicon grease to ensure the sealing of hollow tube 2 further on rubber stopper 5.Sealing seat 1 is welded on insulated gas cylinder, and the gas cylinder that need hunt leak is connected with leak detection forvacuum system by flexible pipe and vacuum pumping tool equipment, adopts leak locator to hunt leak, when the leak rate that leak locator shows is stabilized in < 5 × 10
-9pam
3during/S, spray around weld seam with helium, leak locator is not reported to the police and the numerical value of leak rate does not change, then the sealing effectiveness of this gas cylinder is up to specification.
The beneficial effect of the present embodiment is: the utility model is all set to smooth plane by inside and outside the metal tube of hollow tube, just directly adopts one end of rubber plug jam-pack metal tube just can when being sealed by hollow tube.Abandon the sealing means of traditional employing nut screwing clamping, not only convenient in the making of metal tube, and save nut and O-ring seal.The use of rubber plug both conservation, save the labour expended of a large amount of working times, and the sealing effectiveness of hollow tube is also fine, and the time of airtight test shortens greatly, and work efficiency obtains obvious lifting.
Claims (3)
1. the leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly, it is characterized in that: comprise sealing seat (1) and many hollow tubes (2), the middle part of described sealing seat (1) is provided with a mounting groove (3), many described hollow tubes (2) are fixed in this mounting groove (3), the head of each described hollow tube (2) is welded with the metal tube (4) that is form of annular rings, the middle part of described metal tube (4) is the cavity of up/down perforation, and the inside and outside wall of described metal tube (4) is smooth wall.
2. a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly according to claim 1, is characterized in that: one end port of described metal tube (4) adopts the desk-top rubber stopper (5) of rounding to close.
3. a kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly according to claim 1, it is characterized in that: described sealing seat (1) is in back-off hat type shape, described hollow tube (2) is positioned at the inside of described sealing seat (1), described mounting groove (3) is positioned at the middle position of described sealing seat (1), and described mounting groove (3) penetrates the installation of described sealing seat (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420456389.6U CN204064575U (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420456389.6U CN204064575U (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204064575U true CN204064575U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420456389.6U Expired - Fee Related CN204064575U (en) | 2014-08-14 | 2014-08-14 | A kind of leakage detection apparatus for LNG mounted gas cylinder gas-liquid sealing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204064575U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334006A (en) * | 2014-08-14 | 2016-02-17 | 丹阳市利旺车辆部件有限公司 | Leak detecting device used for LNG vehicle-mounted gas cylinder gas-liquid seal assembly |
-
2014
- 2014-08-14 CN CN201420456389.6U patent/CN204064575U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334006A (en) * | 2014-08-14 | 2016-02-17 | 丹阳市利旺车辆部件有限公司 | Leak detecting device used for LNG vehicle-mounted gas cylinder gas-liquid seal assembly |
| CN105334006B (en) * | 2014-08-14 | 2018-05-04 | 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 components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20200814 |