CN103807468A - Low-temperature safety valve air seal - Google Patents
Low-temperature safety valve air seal Download PDFInfo
- Publication number
- CN103807468A CN103807468A CN201410068523.XA CN201410068523A CN103807468A CN 103807468 A CN103807468 A CN 103807468A CN 201410068523 A CN201410068523 A CN 201410068523A CN 103807468 A CN103807468 A CN 103807468A
- Authority
- CN
- China
- Prior art keywords
- safety valve
- clamping sleeve
- cutting ferrule
- low
- nut
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/08—Arrangements for cutting-off not used
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/10—Arrangements for preventing freezing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a low-temperature safety valve air seal. The safety valve air seal comprises a connector, a clamping sleeve, a clamping sleeve nut and an elbow pipe, wherein the connector is in a sleeve shape, the outer wall of the tail end of the connector is provided with threads connected with the clamping sleeve nut, an air inlet channel is formed in the front end of the connector, an inserting hole is formed in the tail end of the connector, the inner diameter of the air inlet channel is smaller than that of the inserting hole, the inner wall of the tail end of the inserting hole is provided with a conical surface matched with the clamping sleeve, the clamping sleeve nut is in a stepped sleeve shape, the inner wall of the front end of the clamping sleeve nut is provided with threads, the inner diameter of a cavity of the tail end of the clamping sleeve nut is smaller than that of a cavity of the front end, the clamping sleeve is located in the cavity of the clamping sleeve nut, the front end of the clamping sleeve is inserted in the conical surface of the inserting hole, the rear end of the clamping sleeve is pressed on the stepped inner wall of the clamping sleeve nut in an abutting-against mode, and one end of the elbow pipe penetrates through the clamping sleeve nut and the clamping sleeve and is inserted into the inserting hole. The low-temperature safety valve air seal can effectively isolate a low-temperature safety valve from making direct contact with air, so that when the safety valve returns to a base after jumping, and it is avoided that the seal effect of safety valve seat returning is poor because water in the air is adsorbed on components and parts of the safety valve due to low temperature icing.
Description
Technical field
The present invention relates to automobile-used LNG gas cylinder field, specifically a kind of low-temperature safety valve sealing gland.
Background technique
Automobile-used LNG gas cylinder has that capacity is large, service time is long, liquid fills the advantages such as fast; be used widely; low-temperature safety valve is as the important safety attachment of automobile-used LNG gas cylinder; play the effect of safety protection; in the time that automobile-used LNG gas cylinder internal pressure rising exceedes setting value; low-temperature safety valve events, by the air release of superpressure part.Existing low-temperature safety valve in use, there will be safety valve jumping up to discharge fast after cryogenic gas, low-temperature safety valve afterbody directly contacts with atmosphere, airborne moisture can be adsorbed on safety valve component because low temperature freezes, especially on spool or valve seat, while causing safety valve blowback, because of the poorly sealed slow leakage phenomenon of rock gas that occurs, not only cause the waste of natural gas energy resource, also have the serious risk leading to a disaster.
Summary of the invention
The object of the present invention is to provide a kind of rational in infrastructure, Security is reliable, using effect is good low-temperature safety valve sealing gland.
The present invention to achieve these goals, be achieved through the following technical solutions: comprise joint, cutting ferrule, cutting ferrule nut, bend pipe, joint is in sleeve-shaped and front end and is provided with in gas-entered passageway tail end and is provided with jack, joint tail end outer wall is provided with the screw thread of connecting sleeve nut, jack tail end inwall is provided with the conical surface coordinating with cutting ferrule, cutting ferrule nut is ladder bushing shape and front inner wall is provided with screw thread, cutting ferrule nut tail end cavity internal diameter is less than front end cavity internal diameter, cutting ferrule is positioned at the cavity of cutting ferrule nut, front end is plugged on the conical surface of jack, rear end is pressed on the ladder inwall of cutting ferrule nut, bend pipe one end runs through cutting ferrule nut and cutting ferrule inserts in jack.
Beneficial effect of the present invention is: low-temperature safety valve sealing gland, rational in infrastructure, Security is reliable, using effect good, effectively isolated air directly contacts with safety valve afterbody air outlet, while making to return seat after safety valve jumping up, avoid airborne moisture to cause safety valve blowback sealing effect bad because low temperature freezes to be adsorbed on safety valve component, thereby avoid the waste of natural gas energy resource and the serious risk leading to a disaster, and extended the working life of low-temperature safety valve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is schematic perspective view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe low-temperature safety valve sealing gland provided by the invention in detail by mode of execution.Should be understood that these enforcements are only not used in and limit the scope of the invention for the present invention is described.
Concrete, shown in Fig. 1, a kind of low-temperature safety valve sealing gland of the present invention, comprises joint 1, cutting ferrule 5, cutting ferrule nut 6, bend pipe 7.Joint 1 front end is provided with and is connected the outside thread using with low-temperature safety valve, thread root is provided with seal ring 2 outside, joint 1 tail end outer wall is provided with the screw thread of connecting sleeve nut 5, joint 1 Inner Front End is provided with gas-entered passageway 3 and tail end is provided with jack 4, the internal diameter of gas-entered passageway 3 is less than the internal diameter of jack 4, on jack 4 afterbody inwalls, is provided with the cone structure coordinating with cutting ferrule 5; Cutting ferrule nut 6 is ladder bushing shape and front inner wall is provided with the screw thread being connected with joint 1, and cutting ferrule nut 6 tail end cavity internal diameters are less than front end cavity internal diameter; Cutting ferrule 5 is sleeve-shaped, and its front end is the cone structure matching with jack 4 afterbody conical surface of inboard wall, and cutting ferrule 5 is placed in the cavity of cutting ferrule nut 6, and front end is plugged on the conical surface of jack 4 inwalls of joint 1, and rear end is pressed on the ladder inwall of cutting ferrule nut 6; Bend pipe 7 one end run through cutting ferrule nut 6 and cutting ferrule 5 is inserted in the jack 4 of joint 1, bend pipe 7 be middle siphunculus material in the shape of a spiral, inside have venting channels 8.
As a modification of the present invention, the optimal case of the helical buckling of bend pipe 7 should be air outlet 9 and suction port is 90 at conplane angle
., bend pipe 7 curves the helical of 1.25 circles, 2.25 circles, 3.25 circles etc.
In use, one of bend pipe 7 runs through cutting ferrule nut 6 and cutting ferrule 5, and joint 1 and cutting ferrule nut 6 are threaded connection and screw, and cutting ferrule 5 is out of shape inward and tightens up, and hold bend pipe 7 tightly and seal, and the conical surface of one end of cutting ferrule 5 and jack 4 is adjacent to sealing; Joint 1 adopts and is threaded with low-temperature safety valve, seals by seal ring 2.
The present invention in use, low-temperature safety valve sealing gland is threaded with low-temperature safety valve air gate end, keep the air outlet end 9 of bend pipe 7 to install down, when automobile-used LNG gas cylinder internal pressure exceedes low-temperature safety valve setting value, when low-temperature safety valve take-off discharge, the suction port 3 of natural gas via low-temperature safety valve sealing gland joint 1, the venting channels 8 of bend pipe 7 is discharged, and the air displacement in venting channels 8 is blown out, in the time that pressure drop low-temperature safety valve returns, due to rock gas lta (natural gas density is less than air), in the venting channels 8 of bend pipe 7, fill up rock gas, because bend pipe 7 is designed at least 1.25 helicals of enclosing, rock gas in the venting channels 8 of bend pipe 7 can not fallen by air displacement because of automobile fast moving, form sealing gland, by completely isolated to the air outlet of low-temperature safety valve and air.
Claims (3)
1. a low-temperature safety valve sealing gland, it is characterized in that: comprise joint (1), cutting ferrule (5), cutting ferrule nut (6), bend pipe (7), joint (1) is sleeve-shaped and tail end outer wall and is provided with the screw thread of connecting sleeve nut (6), in joint (1) front end, be provided with in gas-entered passageway (3) tail end and be provided with jack (4), the internal diameter of gas-entered passageway (3) is less than the internal diameter of jack (4), jack (4) tail end inwall is provided with the conical surface coordinating with cutting ferrule (4), cutting ferrule nut (6) is ladder bushing shape and front inner wall is provided with screw thread, cutting ferrule nut (5) tail end cavity internal diameter is less than front end cavity internal diameter, cutting ferrule (5) is positioned at the cavity of cutting ferrule nut (6), front end is plugged on the conical surface of jack (4), rear end is pressed on the ladder inwall of cutting ferrule nut (6), bend pipe (7) one end runs through cutting ferrule nut (6) and cutting ferrule (5) inserts in jack (4).
2. a kind of low-temperature safety valve sealing gland according to claim 1, is characterized in that: described bend pipe (7) is middle siphunculus material, is at least 1.25 circle helicals.
3. a kind of low-temperature safety valve sealing gland according to claim 2, is characterized in that: joint (1) front end is provided with and is connected the outside thread using with low-temperature safety valve, and outside thread root is provided with seal ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068523.XA CN103807468A (en) | 2014-02-27 | 2014-02-27 | Low-temperature safety valve air seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068523.XA CN103807468A (en) | 2014-02-27 | 2014-02-27 | Low-temperature safety valve air seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103807468A true CN103807468A (en) | 2014-05-21 |
Family
ID=50704653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410068523.XA Pending CN103807468A (en) | 2014-02-27 | 2014-02-27 | Low-temperature safety valve air seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103807468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2576621A (en) * | 2018-08-22 | 2020-02-26 | Rlbs Ltd | Gas flow regulator apparatus and method of use thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5907101A (en) * | 1996-12-20 | 1999-05-25 | Polti S.P.A. | Safety cap with manometer pressurized containers locking under high pressure |
| CN2572183Y (en) * | 2002-09-18 | 2003-09-10 | 郑三会 | Insertion type gas joint pipe |
| CN1873265A (en) * | 2006-05-25 | 2006-12-06 | 扬中市瑞星工程塑料厂 | Valve piece of dedicated composite tubing for source bottle |
| CN201685696U (en) * | 2010-06-03 | 2010-12-29 | 乌鲁木齐市隆盛达环保科技有限公司 | Liquefied natural gas vehicular gas cylinder |
| CN202884329U (en) * | 2012-10-25 | 2013-04-17 | 阮迪荣 | Gas hose coupler |
| CN103383063A (en) * | 2013-06-09 | 2013-11-06 | 苏州华福低温容器有限公司 | Gas-seal structure of pressure input pipe of movable type low-temperature pressure vessel |
| CN203743512U (en) * | 2014-02-27 | 2014-07-30 | 丹阳市飞轮气体阀门有限公司 | Air seal for low-temperature safety valve |
-
2014
- 2014-02-27 CN CN201410068523.XA patent/CN103807468A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5907101A (en) * | 1996-12-20 | 1999-05-25 | Polti S.P.A. | Safety cap with manometer pressurized containers locking under high pressure |
| CN2572183Y (en) * | 2002-09-18 | 2003-09-10 | 郑三会 | Insertion type gas joint pipe |
| CN1873265A (en) * | 2006-05-25 | 2006-12-06 | 扬中市瑞星工程塑料厂 | Valve piece of dedicated composite tubing for source bottle |
| CN201685696U (en) * | 2010-06-03 | 2010-12-29 | 乌鲁木齐市隆盛达环保科技有限公司 | Liquefied natural gas vehicular gas cylinder |
| CN202884329U (en) * | 2012-10-25 | 2013-04-17 | 阮迪荣 | Gas hose coupler |
| CN103383063A (en) * | 2013-06-09 | 2013-11-06 | 苏州华福低温容器有限公司 | Gas-seal structure of pressure input pipe of movable type low-temperature pressure vessel |
| CN203743512U (en) * | 2014-02-27 | 2014-07-30 | 丹阳市飞轮气体阀门有限公司 | Air seal for low-temperature safety valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2576621A (en) * | 2018-08-22 | 2020-02-26 | Rlbs Ltd | Gas flow regulator apparatus and method of use thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140521 |