CN206458834U - A kind of automobile-used LNG gas cylinders switching valve body - Google Patents
A kind of automobile-used LNG gas cylinders switching valve body Download PDFInfo
- Publication number
- CN206458834U CN206458834U CN201720090899.XU CN201720090899U CN206458834U CN 206458834 U CN206458834 U CN 206458834U CN 201720090899 U CN201720090899 U CN 201720090899U CN 206458834 U CN206458834 U CN 206458834U
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- piston
- cavity
- face
- annular boss
- cylinder
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- 238000010079 rubber tapping Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 25
- 230000033001 locomotion Effects 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 46
- 238000011084 recovery Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model is related to a kind of automobile-used LNG gas cylinders switching valve body, including joint cylinder, connector cover, first piston, second piston, the axially disposed cavity run through of joint cylinder, the middle part of the joint cylinder is along the circumferentially disposed stage portion of its inwall, so that cavity is divided into the first cavity and the second cavity of different-diameter；Safety valve or pressure tapping screw in the entrance point of the first cavity, continuing screw-in after being in contact with first piston cylinder can promote first piston to move, realize the connection of the first cavity and the second cavity, when safety valve or pressure tapping continuation are screwed in, the distance of first piston movement is more than the gap between the end of second piston cylinder and first piston, first piston promotes second piston displacement, realizes connecting for the first cavity and the connector cover port of export.
Description
Technical field
The utility model is related to automobile-used LNG gas cylinders technical field of auxiliary equipment, particularly a kind of automobile-used LNG gas cylinders changeover valve
Body.
Background technology
4-5 safety valve, 1-2 pressure gauge are installed mostly on current automobile-used LNG gas cylinders.According to country《Safety valve makes
Use administrative provisions》5.6th article of regulation, safety valve is typically at least verified once every year；《Pressure gauge uses administrative provisions》Pressure gauge
Typically at least verify every year secondary.It is therefore desirable to which automobile-used LNG gas cylinders are required for carrying out related detection every year.
But current automobile-used LNG gas cylinders are installed in safety valve with manometric, in accordance be relevant national standard, i.e.,
Safety valve must be communicates directly to LNG gas cylinder internals with manometric installation, and centre is fitted without valve.So, entering every time
, it is necessary to which related valve and instrument are removed verification when row valve is examined to instrument school, it is therefore necessary to more than in gas cylinder
Measure gas to empty, there is following harm during aforesaid operations：One is to waste substantial amounts of resource, and the gas of LNG gas cylinder internals is
The LNG gases of ultralow temperature, some gases not used also are left when being detected every time in gas cylinder（Because at all can not be complete
Opened and inspect entirely using complete vehicle is driveed to repair shop again）, 5-10 kilograms at least, at most nearly 20 kilograms, emptying gas cylinder is caused greatly
The LNG gases of amount are discharged among air, and each gas cylinder at least needs to empty twice every year, causes huge waste.
Two be welding, although LNG main component is methane（CH4）, but per kilogram LNG gases are discharged into air
In if be 1.39 cubic meters, therefore emptying gas cylinder needs to discharge about 10-30 cubic metres of gas into air every time, and often
Individual gas cylinder at least needs to empty twice every year, so environmental pollution is serious.
Three be the presence of potential safety hazard, and LNG gases are imflammable gas in itself, and it is ultralow temperature gas, one to add in gas cylinder
As below -128 °, externally there is potential safety hazard during a large amount of emptying, great care safety precautions needed during bleeding,
Accidentally consequence is serious.
Four be inefficiency, often carries out the emptying operation of gas cylinder, it is necessary to the place of longer time and safety, and
Once changing safety valve or manometric overlong time, it is easy for causing the temperature in gas cylinder to raise, when filling LNG again
Need to cool to gas cylinder, repeat the process of repeatedly exhaust decompression, fuel could be filled it up with to gas cylinder again, time-consuming extremely length is not said,
It is also very dangerous, even if can quickly complete replacing safety valve or it is manometric do industry, aerating again is also required to longer time,
Vehicle stagnation of movement half a day at least, at most need several days, it is very inconvenient, have a strong impact on equipment it is normal using and the normal production order,
It is inefficiency, with high costs.
There is provided one kind can realize that quick-replaceable automobile-used LNG gas cylinders switching valve body is that those skilled in the art are badly in need of solution
Technical problem.
Utility model content
The technical problems to be solved in the utility model be to provide it is a kind of it is simple in construction, easy to operate, can realize it is quick more
The automobile-used LNG gas cylinders switching valve body changed.
In order to solve the above technical problems, the automobile-used LNG gas cylinders switching valve body that the utility model is provided, including：Joint cylinder,
Connector cover, first piston, second piston, the axially disposed cavity run through of joint cylinder, the middle part edge of the joint cylinder
The circumferentially disposed stage portion of its inwall, so that the cavity is divided into the first cavity and the second cavity of different-diameter；Described first is empty
The screw thread with safety valve or the cooperation of pressure tapping screw thread, the outlet socket of second cavity are provided in the entrance point of chamber
The connector cover, the port of export of the connector cover is communicated with the sealing container for placing LNG gases；
The first piston includes first piston cylinder, first piston annular boss, and the first piston cylinder is socketed in
In first cavity, front end face and the stage portion of the first piston annular boss fit, for described first
Piston carries out spacing and sealing, and the first piston annular boss is socketed in second cavity；
The middle part of second cavity is along the circumferentially disposed positioning sleeve of its inwall, the rear end face of the first piston annular boss
First spring is set between the front end face of the positioning sleeve, it is spacing for being carried out to the first piston, so that described first
The front end face of piston annular boss fits with the stage portion, with close to carrying out isolation between the first cavity and the second cavity
Envelope；
The second piston includes second piston cylinder, second piston annular boss, and the second piston cylinder passes through institute
Positioning sleeve setting is stated, gap is set between the end of the second piston cylinder and the first piston, so that the first piston
Being axially moveable after certain distance can promote the second piston to move；The front end face of the second piston annular boss with it is described
The rear end face of positioning sleeve is fitted, and the second bullet is set between the rear end face and the connector cover of the second piston annular boss
Spring, it is spacing for being carried out to the second piston, so that the front end face of the second piston annular boss and the stage portion phase
Laminating；
In use, safety valve or pressure tapping screw in the entrance point of first cavity, safety valve or pressure tapping
Continuing screw-in after being in contact with first piston cylinder can promote the first piston to move, and realize the first cavity and the second cavity
Connection, safety valve or pressure tapping continue screw-in, the distance of first piston movement and are more than end and the institute of second piston cylinder
When stating the gap between first piston, first piston promotes the second piston displacement, realizes the first cavity and connector cover outlet
Gas in the connection at end, LNG gas cylinders can enter sealing container through safety valve/pressure gauge, switching valve body, realize in LNG gas cylinders
The recovery of gas；After the completion of recovery, safety valve or pressure tapping screw out the entrance point of first cavity, and first piston is the
One spring, second piston reset in the presence of second spring, realize between the first cavity entrance point and the connector cover port of export
Isolation sealing.
Further, the centrally disposed position-limiting drum of the first piston annular boss rear end face, the second piston cylinder is inserted
Cooperation is connect in the position-limiting drum, for being oriented to the second piston；The end of the second piston cylinder with this
Gap is left between the bottom wall of one piston limit cylinder.
Further, gap, the positioning are left between the inwall of the first piston annular boss and second cavity
The front end of set is placed in the gap between the first piston annular boss and second cavity inner wall, and the positioning sleeve
Front end fits with the stage portion.
Further, the rear end of the positioning sleeve sets ring-type positive stop lug boss to inner side protrusion, and first spring is arranged on
Between the front end face of the rear end face of the first piston annular boss and the positioning sleeve positive stop lug boss；The second piston annular
The rear end face of the front end face of boss and the positioning sleeve positive stop lug boss fits.
Further, between the front end face of the stage portion and the first piston annular boss, the front end of the positioning sleeve
First piston sealing ring is set, to strengthen sealing effectiveness.
Further, set between the rear end face of the front end face of the second piston annular boss and the positioning sleeve positive stop lug boss
Second piston sealing ring is put, to strengthen sealing effectiveness.
Further, connector cover sealing ring is set between the joint cylinder and the connector cover, to strengthen sealing effectiveness.
Further, the clearance distance between the end of the second piston cylinder and the bottom wall of the first piston position-limiting drum is
1mm to 3mm.
The technique effect of utility model：（1）Automobile-used LNG gas cylinders switching valve body of the present utility model, relative to prior art,
It is engaged using first piston, second piston with screwed joint, can be quickly right to control the break-make of switching valve body
Automobile-used LNG gas cylinders to be detected are emptied, beneficial to subsequently being detected to safety valve or pressure gauge；（2）Second piston cylinder
It is engaged with position-limiting drum, effectively defines the shift motion of second piston, while plays guide effect.
Brief description of the drawings
The utility model is described in further detail with reference to Figure of description：
Fig. 1 is the cross-sectional view of automobile-used LNG gas cylinders switching valve body of the present utility model；
Fig. 2 is the cross-sectional view of first piston of the present utility model；
Fig. 3 is the cross-sectional view of second piston of the present utility model.
In figure：Joint cylinder 1, entrance point 11, the port of export 12, screw thread 13, stage portion 14, the first cavity 15, the second cavity
16, first piston 2, first piston cylinder 21, first piston annular boss 22, position-limiting drum 23, the first spring 3, positioning sleeve 4, limit
Position boss 41, second piston 5, second piston cylinder 51, second piston annular boss 52, second spring 6, connector cover 7, first lives
Fill in sealing gasket 8, joint sealing cushion for cover 9, second piston sealing gasket 10.
Embodiment
As shown in Figure 1 to Figure 3, the automobile-used LNG gas cylinders switching valve body of the present embodiment includes joint cylinder 1, connect embodiment 1
Skull 7, first piston 2, second piston 5, the axially disposed cavity run through of joint cylinder 1, the middle part of the joint cylinder 1 along its
The circumferentially disposed stage portion 14 of inwall, so that cavity is divided into the first cavity 15 and the second cavity 16 of different-diameter；First cavity 15
Entrance point 11 in be provided for and safety valve or pressure tapping（Not shown in figure）The screw thread 13 that screw thread coordinates, the second cavity
16 outlet telescopic lap splice lid 7, the port of export 12 of the connector cover 7 and the sealing container for placing LNG gases（Do not show in figure
Go out）Communicate；First piston 2 includes first piston cylinder 21, first piston annular boss 22, and first piston cylinder 21 is socketed in the
In one cavity 15, the end of first piston cylinder 21 is set to 4mm with the spacing at the import of the first cavity 15；First piston ring
The front end face of shape boss 22 fits with stage portion 14, for carrying out spacing and sealing, first piston convex annular to first piston 2
Platform 22 is socketed in the second cavity 16.
The middle part of second cavity 16 is along the circumferentially disposed positioning sleeve 4 of its inwall, the cavity of first piston annular boss 22 and second
Gap is left between 16 inwall, the front end of positioning sleeve 4 is placed between the inwall of 22 and second cavity of first piston annular boss 16
Gap in, the rear end of positioning sleeve 4 sets ring-type positive stop lug boss 41 to inner side protrusion, and the first spring 3 is arranged on first piston ring
Between the rear end face of shape boss 22 and the front end face of positioning sleeve positive stop lug boss 41.
Second piston 5 includes second piston cylinder 51, second piston annular boss 52, and second piston cylinder 51 passes through positioning
Set 4 is set, the centrally disposed position-limiting drum 23 of the rear end face of first piston annular boss 22, and the grafting of second piston cylinder 51 coordinates in limit
In the cylinder 23 of position, for being oriented to second piston 5；The end of second piston cylinder 51 and the bottom of the first piston position-limiting drum 23
2mm gap is left between wall；The rear end face of the front end face of second piston annular boss 52 and positioning sleeve positive stop lug boss 41 is affixed
Close.Second spring 6 is set between the rear end face and connector cover 7 of second piston annular boss 52, for limiting second piston 5
Position, so that the rear end face of the front end face of second piston annular boss 52 and positive stop lug boss 41 fits；Stage portion 14 and first is lived
Fill in and first piston sealing ring 8, second piston annular boss 52 are set between the front end face of annular boss 22, the front end of positioning sleeve 4
Front end face and positioning sleeve positive stop lug boss 41 rear end face between second piston sealing ring 10, joint cylinder 1 and connector cover 7 are set
Between connector cover sealing ring 9 is set, to strengthen sealing effectiveness.
In use, safety valve or pressure tapping screw in the entrance point 11 of the first cavity 15, safety valve or pressure tapping
It is in contact after screwing in 4mm with first piston cylinder 21, continuing screw-in can promote first piston 21 to move, and realize the first cavity 15
With connecting for the second cavity 16；Safety valve or pressure tapping continue to screw in first piston 2 and second piston cylinder 51 after 2mm
End is in contact, and now continues to screw in safety valve or pressure tapping, first piston 2 can promote the displacement of second piston 5, realizes
First cavity 15 is connected with the connector cover port of export 12, and the gas in LNG gas cylinders can enter through safety valve/pressure gauge, switching valve body
Enter sealing container, realize the recovery of gas in LNG gas cylinders；After the completion of recovery, safety valve or pressure tapping screw out the first cavity
15 entrance point 11, first piston 2 resets in the first spring 3, second piston 5 in the presence of second spring 6, realizes that first is empty
Isolation sealing between chamber entrance point 11 and the connector cover port of export 12.
Valve body transfer obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and not
It is the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in the base of described above
It can also be made other changes in different forms on plinth.There is no need and unable to give thoroughly all embodiments
Lift.And these belong to obvious changes or variations that spirit of the present utility model amplifies out still in of the present utility model
Among protection domain.
Claims (8)
1. a kind of automobile-used LNG gas cylinders switching valve body, it is characterised in that including：Joint cylinder（1）, connector cover（7）, first piston
（2）, second piston（5）, the joint cylinder（1）The axially disposed cavity run through, the joint cylinder（1）Middle part along along it
The circumferentially disposed stage portion of wall（14）, so that the cavity is divided into the first cavity of different-diameter（15）With the second cavity（16）；Institute
State the first cavity（15）Entrance point（11）Inside it is provided for the screw thread with safety valve or the cooperation of pressure tapping screw thread（13）, institute
State the second cavity（16）Outlet be socketed the connector cover（7）, the connector cover（7）The port of export（12）With for placing LNG gas
The sealing container of body is communicated；
The first piston（2）Including first piston cylinder（21）, first piston annular boss（22）, the first piston cylinder
（21）It is socketed in first cavity（15）It is interior, the first piston annular boss（22）Front end face and the stage portion（14）
Fit, the first piston annular boss（22）It is socketed in second cavity（16）It is interior；
Second cavity（16）Middle part along the circumferentially disposed positioning sleeve of its inwall（4）, the first piston annular boss（22）
Rear end face and the positioning sleeve（4）Front end face between the first spring is set（3）；
The second piston（5）Including second piston cylinder（51）, second piston annular boss（52）, the second piston cylinder
（51）Through the positioning sleeve（4）Set, the second piston cylinder（51）End and the first piston（2）Between gap set
Put, so that the first piston（2）The second piston can be promoted by being axially moveable after certain distance（5）It is mobile；Described second
Piston annular boss（52）Front end face and the positioning sleeve（4）Rear end face fit, the second piston annular boss
（52）Rear end face and the connector cover（7）Between second spring is set（6）.
2. automobile-used LNG gas cylinders switching valve body according to claim 1, it is characterised in that the first piston annular boss
（22）The centrally disposed position-limiting drum of rear end face（23）, the second piston cylinder（51）Grafting coordinates in the position-limiting drum（23）
It is interior；The second piston cylinder（51）End and the first piston position-limiting drum（23）Bottom wall between leave gap.
3. automobile-used LNG gas cylinders switching valve body according to claim 2, it is characterised in that the first piston annular boss
（22）With second cavity（16）Inwall between leave gap, the positioning sleeve（4）Front end be placed in the first piston
Annular boss（22）With second cavity（16）In gap between inwall, and the positioning sleeve（4）Front end with described
Rank portion（14）Fit.
4. automobile-used LNG gas cylinders switching valve body according to claim 3, it is characterised in that the positioning sleeve（4）Rear end to
Inner side protrusion sets ring-type positive stop lug boss（41）, first spring（3）It is arranged on the first piston annular boss（22）'s
Rear end face and the positioning sleeve positive stop lug boss（41）Front end face between；The second piston annular boss（52）Front end face with
The positioning sleeve positive stop lug boss（41）Rear end face fit.
5. automobile-used LNG gas cylinders switching valve body according to claim 4, it is characterised in that the stage portion（14）With it is described
First piston annular boss（22）Front end face, the positioning sleeve（4）Front end between set first piston sealing ring（8）.
6. automobile-used LNG gas cylinders switching valve body according to claim 5, it is characterised in that the second piston annular boss
（52）Front end face and the positioning sleeve positive stop lug boss（41）Rear end face between set second piston sealing ring（10）.
7. automobile-used LNG gas cylinders switching valve body according to claim 6, it is characterised in that the joint cylinder（1）With it is described
Connector cover（7）Between set connector cover sealing ring（9）.
8. automobile-used LNG gas cylinders switching valve body according to claim 7, it is characterised in that the second piston cylinder（51）
End and the first piston position-limiting drum（23）Bottom wall between clearance distance be 1mm to 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720090899.XU CN206458834U (en) | 2017-01-22 | 2017-01-22 | A kind of automobile-used LNG gas cylinders switching valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720090899.XU CN206458834U (en) | 2017-01-22 | 2017-01-22 | A kind of automobile-used LNG gas cylinders switching valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206458834U true CN206458834U (en) | 2017-09-01 |
Family
ID=59699211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720090899.XU Expired - Fee Related CN206458834U (en) | 2017-01-22 | 2017-01-22 | A kind of automobile-used LNG gas cylinders switching valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206458834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343748A (en) * | 2017-01-22 | 2018-07-31 | 乔森 | A kind of automobile-used LNG gas cylinders switching valve body and its working method |
-
2017
- 2017-01-22 CN CN201720090899.XU patent/CN206458834U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343748A (en) * | 2017-01-22 | 2018-07-31 | 乔森 | A kind of automobile-used LNG gas cylinders switching valve body and its working method |
| CN108343748B (en) * | 2017-01-22 | 2024-01-26 | 乔森 | LNG (liquefied Natural gas) cylinder switching valve body for vehicle and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170901 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |