CN203743512U - Air seal for low-temperature safety valve - Google Patents
Air seal for low-temperature safety valve Download PDFInfo
- Publication number
- CN203743512U CN203743512U CN201420085935.XU CN201420085935U CN203743512U CN 203743512 U CN203743512 U CN 203743512U CN 201420085935 U CN201420085935 U CN 201420085935U CN 203743512 U CN203743512 U CN 203743512U
- Authority
- CN
- China
- Prior art keywords
- cutting ferrule
- safety valve
- low
- nut
- ferrule 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 210000004907 gland Anatomy 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009191 jumping Effects 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract 5
- 238000003780 insertion Methods 0.000 abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000013022 venting Methods 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides an air seal for a low-temperature safety valve. The air seal comprises a connector, a cutting ferrule, a cutting ferrule nut and an elbow. The connector is of a sleeve shape, threads connected with the cutting ferrule nut are arranged on the outer wall of the tail end of the connector, an air inlet passageway is arranged in the front end of the connector, an insertion hole is formed in the tail end of the connector, the internal diameter of the air inlet passageway is smaller than that of the insertion hole, a conical surface matched with the cutting ferrule is arranged on the inner wall of the tail end of the insertion hole, the cutting ferrule nut is of a stepped-sleeve shape, threads are arranged on the inner wall of the front end of the cutting ferrule nut, the internal diameter of a cavity in the tail end of the cutting ferrule nut is smaller than that of a cavity in the front end of the cutting ferrule nut, the cutting ferrule is located in the cavities of the cutting ferrule nut, the front end of the cutting ferrule is inserted into the conical surface of the insertion hole, the rear end of the cutting ferrule is pressed on the stepped inner wall of the cutting ferrule nut in an abutting mode, one end of the elbow penetrates through the cutting ferrule nut and the cutting ferrule to be inserted into the insertion hole. According to the air seal for the low-temperature safety valve, the low-temperature safety valve can be effectively prevented from directly making contact with air, so that when the safety valve returns to a base after jumping, the phenomenon that when water in air is frozen and adsorbed on parts of the safety valve due to the low temperature, and the reseating sealing effect of the safety valve is poor.
Description
Technical field
The utility model 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 purpose of this utility model 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.
The beneficial effects of the utility model are: 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.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model schematic perspective view.
Embodiment
Below in conjunction with accompanying drawing, describe by mode of execution the low-temperature safety valve sealing gland that the utility model provides in detail.Should be understood that these enforcements are only not used in restriction scope of the present utility model for the utility model is described.
Concrete, shown in Fig. 1, a kind of low-temperature safety valve sealing gland described in the utility model, 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 kind of improvement of the present utility model, 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 utility model 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 |
|---|---|---|---|
| CN201420085935.XU CN203743512U (en) | 2014-02-27 | 2014-02-27 | Air seal for low-temperature safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420085935.XU CN203743512U (en) | 2014-02-27 | 2014-02-27 | Air seal for low-temperature safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743512U true CN203743512U (en) | 2014-07-30 |
Family
ID=51343313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420085935.XU Expired - Lifetime CN203743512U (en) | 2014-02-27 | 2014-02-27 | Air seal for low-temperature safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807468A (en) * | 2014-02-27 | 2014-05-21 | 丹阳市飞轮气体阀门有限公司 | Low-temperature safety valve air seal |
-
2014
- 2014-02-27 CN CN201420085935.XU patent/CN203743512U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807468A (en) * | 2014-02-27 | 2014-05-21 | 丹阳市飞轮气体阀门有限公司 | Low-temperature safety valve air seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
|
| CX01 | Expiry of patent term |