CN201166172Y - Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control - Google Patents
Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control Download PDFInfo
- Publication number
- CN201166172Y CN201166172Y CNU2008200977810U CN200820097781U CN201166172Y CN 201166172 Y CN201166172 Y CN 201166172Y CN U2008200977810 U CNU2008200977810 U CN U2008200977810U CN 200820097781 U CN200820097781 U CN 200820097781U CN 201166172 Y CN201166172 Y CN 201166172Y
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- valve
- valve body
- spool
- spring
- sensing
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Abstract
The utility model provides a super no-voltage pilot valve for controlling safe amputation of an oil and natural gas wellhead, which comprises a valve body, a valve core, an induction valve body, an induction vale core, a spring cylinder, a crown bar, a spring, a spring guide bar and the like. A valve pocket and the valve body are radically sealed through a sealing ring, and the vale core and the valve pocket are radically sealed through the sealing ring, the opening-closing differential pressure is reduced, and the precision of the pilot vale is improved. In addition, three rings of radial pores are distributed on the valve pocket in equal space. One ring of pores on two sides is rightly communicated with a super-pressure pilot valve opening P1 and a no-pressure pilot valve opening P2 on the valve body. One ring of pores in the middle is rightly communicated with a medium outlet O on the valve body. Two rings of ring grooves are opened on the excircle surface of the valve core, and the widths of the ring grooves are rightly approximately wider than the distance among far walls of two rings of adjacent pores on the valve pocket. One ring of pores on both sides on the valve pocket is respectively communicated with one ring of pores in the middle. Therefore, the valve core moves left and right under the action of induction pressure and spring force, the precision is improved, and the movement is more flexible.
Description
Technical field
The utility model belongs to the valve technology field.
Background technique
Super decompression pilot valve is that petroleum gas well head safety is blocked the important control element in the control gear.Owing to adopt the specific (special) requirements of gas transmission technology, to its control accuracy, the requirement of Blowdown of a safety valve value is higher to the requirement of safety valve than country.The super decompression pilot valve of general manufacturer production adopts the conical surface or end face seal, need certain pressure, and this power needs spring to apply, and numerical value is indefinite, and so just directly precision is adjusted in influence.Because the defective on the structural principle, its control accuracy and Blowdown of a safety valve value do not reach the requirement of adopting gas transmission technology far away.
The model utility content
The purpose of this utility model is the problems referred to above at the prior art existence, propose a kind of rock gas well head safety and block the super decompression pilot valve of control, adopt the spool radial seal, valve pocket is radially processed a plurality of micropores, solves its precision and Blowdown of a safety valve and does not reach the problem of adopting defeated technological requirement.
The technical solution of the utility model is as follows:
This petroleum gas well head safety is blocked control, and it includes valve body, spool, sensing valve body, sensing spool, spring strut, push rod, spring and spring conductor rod with super decompression pilot valve; Described sensing valve body is threaded with valve body, and the sensing spool is housed in the sensing valve body, seals by seal ring between sensing spool and the sensing valve body; In the described valve body valve pocket is housed, spool is housed in the valve pocket, carry out radial seal by seal ring between valve pocket and the valve body, also carry out radial seal between spool and the valve pocket by seal ring, spring strut is threaded with valve body, spring conductor rod and spring are housed in the spring strut, and the spring conductor rod front end withstands on the spool by push rod, and the spring conductor rod rear end is connected with controlling mechanism.Be distributed with three circle radial pores in described valve pocket equal intervals, a circle micropore on both sides just in time with valve body on superpressure pilot valve mouth P1 and decompression pilot valve mouth P2 connect, the media outlet O that a middle circle micropore just is being better than on the valve body is communicated with; Have two circle annular grooves on the periphery of described spool, the width of annular groove just in time is wider than on the valve pocket distance between the wall far away of the adjacent micropore of two circles approximately, respectively the circle micropore on both sides on the valve pocket and middle is enclosed micropore and is communicated with.
This super decompression pilot valve has the function of superpressure pilot valve and decompression pilot valve, the function of two kinds of pilot valves is integrated, when the medium of carrying (gas, liquid) when superpressure pilot valve valve port P1 enters, the function of this moment is the superpressure pilot valve, when then be the decompression pilot valve when decompression pilot valve mouth P2 enters.
Superpressure pilot valve function: the medium of conveying enters from P1.When the pressure sensor of K during greater than the spring pressure set up, spool moves to right, and makes the connection of P1 mouth and O mouth, and the medium that is transferred passes through.When the pressure sensor of K mouth during less than the spring pressure set up, P1 mouth and O mouth are cut off, and the medium that is transferred is prevented from.
Decompression pilot valve function: the medium that is transferred enters from the P2 mouth, when the pressure sensor of K mouth during less than the spring set pressure, spool moves to left, P2 mouth and O mouth are connected, the medium that is transferred passes through, when the pressure sensor of K mouth during greater than the spring pressure set up, P2 mouth and O mouth are cut off, the medium prevention that is transferred.
The advantage of this superpressure pilot valve is as follows:
1. be radial seal between spool and valve pocket, reduce Blowdown of a safety valve, the pilot valve precision is improved.
2. radially open a plurality of little shape through holes (Φ 0.8mm) at valve pocket, spool is move left and right under the effect of pressure sensor and spring force just, not only improves precision, and makes action sensitive more.
3. simple in structure, technology capability and interchangeability are good.
Description of drawings
Fig. 1 is super decompression pilot valve structural representation
Fig. 2 is the valve pocket structural representation
Embodiment
Describe structure of the present utility model in detail below in conjunction with accompanying drawing:
Referring to Fig. 1, this super decompression pilot valve includes valve body 2, spool 4, sensing valve body 1, sensing spool 3, spring strut 6, push rod 13, spring 8 and spring conductor rod 7 etc.Sensing valve body 1 is threaded with valve body 2, and sensing spool 3 is housed in the sensing valve body 1, seals by seal ring 15 between sensing spool 3 and the sensing valve body 1.Valve pocket 5 is housed in the valve body 2, spool 4 is housed in the valve pocket 5, an end of spool 4 withstands on the end face of sensing spool 3, carries out radial seal by seal ring 11 between spool 4 and the valve pocket 5, also carries out radial seal by seal ring 12 between valve pocket 5 and the valve body 2.Spring strut 6 is threaded with valve body 2, and spring conductor rod 7 and spring 8 are housed in the spring strut 6, and spring conductor rod 7 front ends withstand on spool 4 the other ends by push rod 13, and spring conductor rod 7 rear ends are connected with controlling mechanism.Be distributed with three circle radial pores in described valve pocket 5 equal intervals, circle micropore 5-1 and a 5-2 on both sides just in time with valve body 2 on superpressure pilot valve mouth P1 and decompression pilot valve mouth P2 connect, a middle circle micropore 5-3 just in time is communicated with media outlet O on the valve body 2.Have two circle annular groove 4-1 and 4-2 on the periphery of spool 4, the width of annular groove just in time is wider than the distance between the wall far away of the adjacent micropore of two circles on the valve pocket approximately, respectively the circle micropore 5-1 on both sides on the valve pocket and 5-2 and middle one is enclosed micropore 5-3 and is communicated with.
Claims (2)
1, petroleum gas well head safety is blocked the super decompression pilot valve of control, and it is characterized in that: it includes valve body (2), spool (4), sensing valve body (1), sensing spool (3), spring strut (6), push rod (13), spring (8) and spring conductor rod (7); Described sensing valve body (1) is threaded with valve body (2), and sensing spool (3) is housed in the sensing valve body (1), seals by seal ring (15) between sensing spool (3) and the sensing valve body (1); Valve pocket (5) is housed in the described valve body (2), spool (4) is housed in the valve pocket (5), one end of spool (4) withstands on the end face of sensing spool (3), carry out radial seal by seal ring (11) between spool (4) and the valve pocket (5), also carry out radial seal between valve pocket (5) and the valve body (2) by seal ring (12); Described spring strut (6) is threaded with valve body (2), and spring conductor rod (7) and spring (8) are housed in the spring strut (6), and spring conductor rod (7) front end withstands on spool (4) the other end by push rod (13), and spring conductor rod (7) rear end is connected with controlling mechanism; Be distributed with three circle radial pores in described valve pocket (5) equal intervals, the one circle micropore (5-1) on both sides and (5-2) just in time with valve body (2) on superpressure pilot valve mouth (P1) and decompression pilot valve mouth (P2) connect, one of centre is enclosed micropore (5-3) and just in time is communicated with media outlet (O) on the valve body (2); On the periphery of described spool (4), have two circle annular grooves (4-1) and (4-2), the width of annular groove just in time is wider than on the valve pocket distance between the wall far away of the adjacent micropore of two circles approximately, respectively with the circle micropore (5-1) on both sides on the valve pocket with (5-2) enclose micropore (5-3) with one of centre and be communicated with.
2, super decompression pilot valve according to claim 1, it is characterized in that: described controlling mechanism comprises adjusting screw rod (9) and locking nut (10), spring conductor rod (7) rear end is connected with adjusting screw rod (9), and adjusting screw rod (9) is locked on the spring strut (6) by locking nut (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200977810U CN201166172Y (en) | 2008-03-10 | 2008-03-10 | Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200977810U CN201166172Y (en) | 2008-03-10 | 2008-03-10 | Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201166172Y true CN201166172Y (en) | 2008-12-17 |
Family
ID=40191560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200977810U Expired - Lifetime CN201166172Y (en) | 2008-03-10 | 2008-03-10 | Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201166172Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865395A (en) * | 2011-07-04 | 2013-01-09 | 贵州红林机械有限公司 | Inserted pressure regulating valve |
| CN103363163A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | Decompression valve for electro-hydraulic servo injection modeling machine |
| CN111089094A (en) * | 2019-12-25 | 2020-05-01 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure release valve with adjusting device capable of suppressing squeaking |
-
2008
- 2008-03-10 CN CNU2008200977810U patent/CN201166172Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865395A (en) * | 2011-07-04 | 2013-01-09 | 贵州红林机械有限公司 | Inserted pressure regulating valve |
| CN102865395B (en) * | 2011-07-04 | 2014-03-26 | 贵州红林机械有限公司 | Inserted pressure regulating valve |
| CN103363163A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | Decompression valve for electro-hydraulic servo injection modeling machine |
| CN103363163B (en) * | 2012-03-27 | 2015-06-17 | 上海英威腾工业技术有限公司 | Decompression valve for electro-hydraulic servo injection modeling machine |
| CN111089094A (en) * | 2019-12-25 | 2020-05-01 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure release valve with adjusting device capable of suppressing squeaking |
| CN111089094B (en) * | 2019-12-25 | 2022-05-13 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure release valve with adjusting device capable of suppressing squeaking |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081217 |