CN203322391U - Detachable pipeline high-pressure check valve for natural gas pipelines - Google Patents
Detachable pipeline high-pressure check valve for natural gas pipelines Download PDFInfo
- Publication number
- CN203322391U CN203322391U CN2013203219967U CN201320321996U CN203322391U CN 203322391 U CN203322391 U CN 203322391U CN 2013203219967 U CN2013203219967 U CN 2013203219967U CN 201320321996 U CN201320321996 U CN 201320321996U CN 203322391 U CN203322391 U CN 203322391U
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- spherical joint
- nut
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- valve body
- cylindrical
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Abstract
The utility model discloses a detachable pipeline high-pressure check valve for natural gas pipelines. The detachable pipeline high-pressure check valve comprises a spherical joint a, a nut a, a valve, a valve clack, a spring, a screw nipple, a nut b and a spherical joint b. External threads are arranged at a conical gas cavity end of the valve, and a cylindrical connecting cavity is provided with internal threads; one end of the screw nipple is connected with the internal threads of the cylindrical connecting cavity of the valve by external threads, and a sealing polytetrafluoroethylene gasket is arranged at the end of the screw nipple; the valve clack and the spring are positioned in the valve; both the spherical joint a and the spherical joint b are stepped cylinders and are provided with inner cylindrical cavities, a spherical surface is arranged at one end of each spherical joint, the ends of the spherical joint a and the spherical joint b are respectively fittingly connected with a conical gas cavity of the valve and a conical gas cavity of the screw nipple, both the nut a and the nut b are provided with internal threads, the spherical joint a is fixedly connected with the external threads of the valve by the nut a, and the spherical joint b is fixedly connected with the external threads of the screw nipple by the nut a. The detachable pipeline high-pressure check valve has the advantages of simple structure, low cost, small size, safety and reliability in running, capability of being detached in an online manner and convenience in maintenance.
Description
(1) technical field
The utility model relates to natural valve station equipment, particularly a kind of detachable pipeline formula high-pressure check valve for natural gas line.
(2) background technique
In natural-gas station house equipment, for safety is provided with high-pressure check valve usually in the compressed natural gas pipeline.Safety check commonly used comprises rise-fall type, rotary-open type, dish formula and pipe type etc. at present.Lift check valve can only be arranged on horizontal official road; The Swing check valve poor sealing; The structure of dish formula safety check is relatively simple but sealing is the poorest, is generally used for the occasion not high to sealing requirements; The flap of pipe type safety check slides along the valve body center line, and its volume is little, lightweight, and technology capability is good, is one of safety check developing direction.
(3) model utility content
The purpose of this utility model is for above-mentioned technical Analysis and existing problems, a kind of detachable pipeline formula high-pressure check valve for natural gas line is provided, this pipe type high-pressure check valve is simple in structure, cost is low, good sealing effect, safe and reliable to operation, can effectively prevent the return-air of high-pressure natural gas, guarantee the safe operation of complete equipment.
The technical solution of the utility model:
A kind of detachable pipeline formula high-pressure check valve for natural gas line, comprise that spherical joint a, nut a, valve body, flap, spring, silk are to, nut b and spherical joint b, valve body is the stepped shaft cylindrical body, central lumen comprises conical air cavity, cylindrical air cavity, conical Seal cage, cylindrical flap chamber and cylindrical connection chamber, the conical air cavity end of valve body is provided with outside thread, and cylindrical connection chamber is provided with internal thread; Silk is the stepped shaft cylindrical body to external form, and central lumen comprises cylindrical air cavity and conical air cavity, and the right two ends of silk are respectively equipped with outside thread, and the right end of silk is connected with the internal thread of valve cylinder-shaped connection chamber by outside thread and is provided with the tetrafluoro washer sealing; Flap and spring are positioned at the valve body of valve body, and flap is provided with conical sealing surface and cylinder groove, are inlaid with the O RunddichtringO on conical sealing surface and mate with the conical Seal cage of valve body, and spring is located between the cylinder groove and a right end face of flap; Spherical joint a is identical with spherical joint b structure, be the stepped shaft cylindrical body and be provided with cylindrical cavity, the end of spherical joint a and spherical joint b is sphere and joins with conical air cavity and a right conical air cavity coupling of valve body respectively, nut a and nut b are equipped with internal thread, spherical joint a is connected and fixed by the outside thread of nut a and valve body, and spherical joint b is connected and fixed with a right outside thread by nut a.
Working procedure of the present utility model:
Rock gas enters rear promotion flap by the suction port of air inlet union and moves down, and spring is compressed, now flap is opened by the sealing surface between O type circle and valve body, and after opening, rock gas flows to lower exit by the survey perforate on flap, and flows into downstream line by the outlet union.When exporting external pressure higher than entry end, move on flap and pass through O type circle and valve seal, and then preventing that gas downstream from oppositely flowing into upstream line.
Applicable scope of the present utility model is: the Men Zhan, industrial park in large-scale gas company, city and residential quarter station.
The utility model has the advantages that: this pipe type high-pressure check valve is simple in structure, cost is low, volume is little, safe and reliable to operation, and can dismantle online, easy to maintenance.
(4) accompanying drawing explanation
Accompanying drawing is this pipe type high-pressure check valve structural representation.
In figure: 1. 8., spherical joint a 2. nut a 3. valve body 4. flap 5.O RunddichtringO 6. spring 7. tetrafluoro packing ring is to 9. nut b10. spherical joint b
(5) embodiment
Embodiment:
A kind of detachable pipeline formula high-pressure check valve for natural gas line, comprise spherical joint a1, nut a2, valve body 3, flap 4, spring 6, silk to 8, nut b9 and spherical joint b10, valve body 3 is the stepped shaft cylindrical body, central lumen comprises conical air cavity, cylindrical air cavity, conical Seal cage, cylindrical flap chamber and cylindrical connection chamber, the conical air cavity end of valve body 3 is provided with outside thread, and cylindrical connection chamber is provided with internal thread; Silk is the stepped shaft cylindrical body to 8 external forms, and central lumen comprises cylindrical air cavity and conical air cavity, and silk is respectively equipped with outside thread to 8 two ends, and silk is connected with the internal thread of valve body 3 cylindrical connection chambers by outside thread and is provided with tetrafluoro packing ring 7 end of 8 and seals; Flap 4 and spring 6 are positioned at the valve body 3 of valve body 3, flap 4 is provided with conical sealing surface and cylinder groove, on conical sealing surface, be inlaid with O RunddichtringO 5 and with the conical Seal cage coupling of valve body 3, spring 6 is located at the cylinder groove of flap 4 and silk between 8 end face; Spherical joint a1 is identical with spherical joint b10 structure, be the stepped shaft cylindrical body and be provided with cylindrical cavity, the end of spherical joint a1 and spherical joint b10 is sphere and with conical air cavity and the silk of valve body 3,8 conical air cavity coupling is joined respectively, nut a2 and nut b9 are equipped with internal thread, spherical joint a1 is connected and fixed by the outside thread of nut a2 and valve body 3, and spherical joint b10 is connected and fixed 8 outside thread with silk by nut a9.
In this embodiment, the gas inlet and outlet spherical joint all adopts Φ 25 * 6.5, material 20#; The nut specification is M33S45, material 20#; Valve body is M33-FM36, valve port diameter Φ 12; The flap specification is 20,60 ° of Φ, material 20#; The phenyl tetrafluoride pad specification is Φ 36-Φ 29-2, material 4F; Silk is M39-M33 to specification, material 20#.
Claims (1)
1. the detachable pipeline formula high-pressure check valve for natural gas line, it is characterized in that: comprise that spherical joint a, nut a, valve body, flap, spring, silk are to, nut b and spherical joint b, valve body is the stepped shaft cylindrical body, central lumen comprises conical air cavity, cylindrical air cavity, conical Seal cage, cylindrical flap chamber and cylindrical connection chamber, the conical air cavity end of valve body is provided with outside thread, and cylindrical connection chamber is provided with internal thread; Silk is the stepped shaft cylindrical body to external form, and central lumen comprises cylindrical air cavity and conical air cavity, and the right two ends of silk are respectively equipped with outside thread, and the right end of silk is connected with the internal thread of valve cylinder-shaped connection chamber by outside thread and is provided with the tetrafluoro washer sealing; Flap and spring are positioned at the valve body of valve body, and flap is provided with conical sealing surface and cylinder groove, are inlaid with the O RunddichtringO on conical sealing surface and mate with the conical Seal cage of valve body, and spring is located between the cylinder groove and a right end face of flap; Spherical joint a is identical with spherical joint b structure, be the stepped shaft cylindrical body and be provided with cylindrical cavity, the end of spherical joint a and spherical joint b is sphere and joins with conical air cavity and a right conical air cavity coupling of valve body respectively, nut a and nut b are equipped with internal thread, spherical joint a is connected and fixed by the outside thread of nut a and valve body, and spherical joint b is connected and fixed with a right outside thread by nut a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203219967U CN203322391U (en) | 2013-06-05 | 2013-06-05 | Detachable pipeline high-pressure check valve for natural gas pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203219967U CN203322391U (en) | 2013-06-05 | 2013-06-05 | Detachable pipeline high-pressure check valve for natural gas pipelines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203322391U true CN203322391U (en) | 2013-12-04 |
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ID=49661743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203219967U Expired - Fee Related CN203322391U (en) | 2013-06-05 | 2013-06-05 | Detachable pipeline high-pressure check valve for natural gas pipelines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203322391U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889576A (en) * | 2014-12-11 | 2016-08-24 | 西安航天发动机厂 | High-sensitivity one-way valve |
| CN111345868A (en) * | 2020-03-17 | 2020-06-30 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Hemostasis device for trunk bleeding |
| CN115479202A (en) * | 2021-06-16 | 2022-12-16 | 中国石油天然气股份有限公司 | Grease injection nozzle, detachable grease injection nozzle assembly and detaching method |
-
2013
- 2013-06-05 CN CN2013203219967U patent/CN203322391U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889576A (en) * | 2014-12-11 | 2016-08-24 | 西安航天发动机厂 | High-sensitivity one-way valve |
| CN105889576B (en) * | 2014-12-11 | 2019-07-23 | 西安航天发动机厂 | Highly sensitive check valve |
| CN111345868A (en) * | 2020-03-17 | 2020-06-30 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Hemostasis device for trunk bleeding |
| CN115479202A (en) * | 2021-06-16 | 2022-12-16 | 中国石油天然气股份有限公司 | Grease injection nozzle, detachable grease injection nozzle assembly and detaching method |
| CN115479202B (en) * | 2021-06-16 | 2023-11-21 | 中国石油天然气股份有限公司 | Grease injection nozzle, detachable grease injection nozzle assembly and disassembly method |
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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 |
Granted publication date: 20131204 Termination date: 20160605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |