CN1029331C - Gas cylinder valve - Google Patents
Gas cylinder valve Download PDFInfo
- Publication number
- CN1029331C CN1029331C CN 92108384 CN92108384A CN1029331C CN 1029331 C CN1029331 C CN 1029331C CN 92108384 CN92108384 CN 92108384 CN 92108384 A CN92108384 A CN 92108384A CN 1029331 C CN1029331 C CN 1029331C
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- CN
- China
- Prior art keywords
- gas
- spool
- gas cylinder
- valve
- purity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention provides a gas cylinder valve. The valve is characterized in that an excess pressure maintaining mechanism is arranged on a gas inlet or outlet joint of a common gas cylinder valve. The present invention is especially suitable for the gas cylinder filled with high-purity gas. In the gas charging process of the gas cylinder, the excess pressure maintaining mechanism automatically opens so that gas is charged into the gas cylinder. In the process of using gas in the gas cylinder, the excess pressure maintaining mechanism automatically closes when the gas is to be used up, namely that the gas pressure is reduced to 0.3 to 0.5MPa. Therefore, the excess pressure in the gas cylinder is always maintained higher than atmospheric pressure. The present invention prevents air or other kinds of foreign gas from entering the gas cylinder, and thus, the high-purity gas is not polluted.
Description
The present invention relates to a kind of gas cylinder valve, particularly a kind of confession fills the gas cylinder valve that high-purity gas is used.
It is 99.99% even the higher oxygen of purity that purity is used in the development of current industrial technology in a large number, nitrogen, argon gas, neon, helium, krypton gas, gases such as xenon, the existing gas cylinder valve that fills high-purity gas is by valve body, valve rod, spool, handwheel and safety attachment are formed, when valve handle was opened, valve rod had spool and upwards promotes, and high-purity gas is discharged by turnover gas interface by gas channel in the gas cylinder, as long as valve handle does not cut out, high-purity gas will be discharged continuously until close with barometric pressure in the gas cylinder, owing to can't keep the pressure in the gas cylinder to be higher than barometric pressure, the water vapor in the ambient air or other impurity will enter with air and make the high-purity gas that fills once more contaminated and can't use in the bottle.
For solving this pollution problem, usual way is that used gas cylinder (treating to fill once more) is carried out heated baking and vacuumizes the foreign gas that enters the high-purity gas gas cylinder with removing, obviously this method was both time-consuming, and effort expends the energy again, can not satisfy the needs of high-purity gas production development.
The purpose of this invention is to provide a kind of improved gas cylinder valve, it is equipped with the overbottom pressure retaining mechanism, can prevent that the high-purity gas gas cylinder is by the exogenous impurity gaseous contamination.
The present invention is achieved in that it is the same with existing valve, comprise valve body, valve rod, spool, handwheel, the interface and the turnover gas interface that link steel cylinder are arranged on the valve body, it is characterized in that passing in and out the overbottom pressure retaining mechanism is housed on the gas interface, the overbottom pressure retaining mechanism is at turnover gas jointing a locking nut to be installed, settle a forward spool that supports by big spring in the locking nut, the end face of forward spool matches with the sealing surface of turnover gas interface, settle the reverse spool of a band little spring in the forward spool of overbottom pressure retaining mechanism, oppositely the outer end conical surface of spool matches with the inner conical surface of forward spool, for preventing that bottle interior gas from leaking from locking nut and turnover gas jointing, at the other seal ring that is equipped with of locking nut tapered end face, its working principle is: when gas cylinder when emitting high-purity gas, high-purity gas is opened the formed gas channel of spool by handwheel and is arrived the overbottom pressure retaining mechanism, high-purity gas pressure in gas cylinder is greater than 0.3-0.5MPa, during promptly greater than the elastic force of big spring, the forward spool of overbottom pressure retaining mechanism is backed down, high-purity gas flows out by the passage between forward spool and the locking nut, high-purity gas pressure in gas cylinder is lower than 0.3-0.5MPa, during promptly less than the elastic force of big spring, the forward spool of overbottom pressure retaining mechanism is under the effect of spring force, draw close to turnover gas interface internal face, seal gas channel, thereby the high-purity gas of keeping in the gas cylinder has certain pressure, prevents that introduced contaminants gas from invading and polluting.
For making the forward spool under the effect of spring, can seal and be close to turnover gas interface inner conical surface, in forward spool exterior edge face seal ring is housed.
When gas cylinder when charging high-purity gas, rotating handwheel drive valve rod upwards promotes spool, high-purity gas backs down the reverse spool that is supported by little spring, loop by reverse spool and forward spool charges into gas cylinder, gas replenishment process finishes, and oppositely spool is drawn close to forward spool interior edge face under the little spring effect.For preventing that bottle interior gas from leaking from reverse spool and forward valve core chamber, thereby seal ring is housed, reverse spool exterior edge face and forward spool interior edge face is sealed be close in the reverse exterior edge face of spool.
Before charging steel cylinder once more, when checking as needs whether the high-purity gas gas cylinder keeps the overbottom pressure of 0.3-0.5MPa, the thin masthead of available metal is opened the reverse spool of overbottom pressure retaining mechanism, remaining high-purity gas can flow out by the forward spool and the reverse annular pass of spool in the gas cylinder, also can where necessary the residual gas in the gas cylinder be drained and gas cylinder is vacuumized processing with the method.
For overbottom pressure retaining mechanism and turnover gas interface are connected airtight, intend adopting threaded coupling for well.
Gas cylinder valve of the present invention is equipped with insurance institution to prevent superpressure in the bottle on the valve body of valve, ensure safety.
The invention solves the pollution problem of high-purity gas gas cylinder, reduced former high-purity gas gas cylinder and charged the preceding loaded down with trivial details operation that needs baking to vacuumize once more, and saved the energy.Because the present invention only needs overbottom pressure retaining mechanism of attaching on the turnover gas interface of original valve, and is simple in structure, thereby implements conveniently.The present invention also is applicable to common gas cylinder and need keeps other occasion of residual pressure except being applicable to the high-purity gas gas cylinder.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the component diagram of overbottom pressure retaining mechanism of the present invention.
The view of overbottom pressure retaining mechanism when Fig. 3 is inflation.
The view of overbottom pressure retaining mechanism when Fig. 4 is venting.
Number in the figure is: 1-turnover gas interface, 2-seal ring, 3-little spring, 4-big spring, the 5-locking nut, 6-seal ring, the reverse spool of 7-, 8-forward spool, the 9-seal ring, 10-handwheel, 11-valve rod, the 12-spool, 13-valve body, 14-insurance institution, 15-steel cylinder interface, A-turnover gas interface 1 inner conical surface, B-locking nut 5 tapered end faces, C-forward spool 8 end faces, the D-forward spool 8 inner conical surfaces, the reverse spool of E-7 exterior edge faces.
Embodiment:
According to Fig. 1 overbottom pressure retaining mechanism is to be loaded in the gas cylinder valve turnover gas interface 1, it comprises the locking nut 5 that is loaded on turnover gas interface 1 place, settle a forward spool 8 that supports by big spring 4 in the locking nut 5, the end face C of forward spool 8 matches with turnover gas interface 1 inner conical surface A, settle a reverse spool 7 that supports by little spring 3 in the forward spool 8, oppositely the conical surface E of spool 7 matches with forward spool 8 inner conical surface D.
Gas cylinder is when emitting high-purity gas, as long as rotate handwheel 10, drive valve rod 11, spool 12 is upwards promoted, high-purity gas backs down the forward spool 8 that is supported by big spring 4, flow out via the place, annular pass that forward spool 8 and locking nut 5 form, use for the user, the view of overbottom pressure retaining mechanism when seeing Fig. 4 for details and exitting, for preventing that high-purity gas from leaking from locking nut 5 and turnover gas interface 1 scyewed joint, the other O RunddichtringO 9 that is equipped with of locking nut 5 tapered end face B, high-purity gas pressure is lower than 0.3-0.5MPa in gas cylinder, the elastic force of big spring 4 is enough to make the O RunddichtringO 2 at forward spool 8 end face C places to be adjacent to turnover gas interface 1 inner conical surface A, high-purity gas can't flow out in the bottle, for preventing that bottle interior high-purity gas from flowing out from the annular pass that is formed by reverse spool 7 and forward spool 8, oppositely is equipped with O RunddichtringO 6 on the spool 7 exterior edge face E.O RunddichtringO 2,6,9 can be made with rubber.
Gas cylinder as long as rotate handwheel 10, drives valve rod 11 when filling high-purity gas, spool 12 is upwards promoted, and high-purity gas backs down the reverse spool 7 that is supported by little spring 3, enters steel cylinder via reverse spool 7 and the annular pass that forward spool 8 forms.The view of overbottom pressure retaining mechanism when seeing Fig. 3 for details and inflating.
Claims (3)
1, a kind of gas cylinder valve, comprise valve body (13), valve rod (11), spool (12), handwheel (10), the interface (15) and the turnover gas interface (1) that connect steel cylinder are arranged on the valve body 13, it is characterized in that passing in and out on the gas interface (1) the overbottom pressure retaining mechanism is housed, this overbottom pressure retaining mechanism is to locate to install a locking nut (5) at turnover gas interface (1), settle a forward spool (8) that is supported by big spring (4) in the locking nut (5), the end face of forward spool (8) matches with the sealing surface of turnover gas interface (1).
2, gas cylinder valve according to claim 1 is characterized in that settling a reverse spool (7) of being with little spring (3) in the forward spool (8), and oppositely the outer end conical surface of spool (7) matches with the inner conical surface of forward spool (8).
3, gas cylinder valve according to claim 1 and 2 is characterized in that the other seal ring (9) that is equipped with of locking nut (5) tapered end face, on the exterior edge face of the exterior edge face of forward spool (8) and reverse spool (7) seal ring (2,6) is housed all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108384 CN1029331C (en) | 1992-04-23 | 1992-04-23 | Gas cylinder valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108384 CN1029331C (en) | 1992-04-23 | 1992-04-23 | Gas cylinder valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1078027A CN1078027A (en) | 1993-11-03 |
| CN1029331C true CN1029331C (en) | 1995-07-12 |
Family
ID=4943494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108384 Expired - Fee Related CN1029331C (en) | 1992-04-23 | 1992-04-23 | Gas cylinder valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029331C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1906066A1 (en) * | 2006-09-28 | 2008-04-02 | Luxembourg Patent Company S.A. | Valve, in particular for ultra high purity gas containers |
| CN214946629U (en) * | 2021-07-05 | 2021-11-30 | 丹阳市飞轮气体阀门有限公司 | Gas cylinder valve with pressure maintaining function |
| CN115684433A (en) * | 2023-01-05 | 2023-02-03 | 江苏惠斯通机电科技有限公司 | Portable modularized portable box type gas chromatograph |
-
1992
- 1992-04-23 CN CN 92108384 patent/CN1029331C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1078027A (en) | 1993-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |