CN102644760B - Sealing structure of ultrahigh-pressure needle valve - Google Patents
Sealing structure of ultrahigh-pressure needle valve Download PDFInfo
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- CN102644760B CN102644760B CN 201210123745 CN201210123745A CN102644760B CN 102644760 B CN102644760 B CN 102644760B CN 201210123745 CN201210123745 CN 201210123745 CN 201210123745 A CN201210123745 A CN 201210123745A CN 102644760 B CN102644760 B CN 102644760B
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- needle
- valve
- valve rod
- ring
- valve body
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Abstract
The invention discloses a sealing structure of an ultrahigh needle valve, which comprises a valve body (1), an upper bonnet (2) and a valve stem (3). A valve needle (4) is mounted at the lower end of the valve stem (3), a supporting gasket (5) is arranged outside the valve needle (4), a seal ring (6) is arranged between the supporting gasket (5) and the valve body (1), the supporting gasket (5) and the seal ring (6) form a seal component, a supporting ring (7) is arranged at one end of the seal component, and one or multiple seal components are arranged between the valve needle (4) and the valve body (1) along the valve needle (4) axially. The sealing structure has the advantages that the sealing structure has reliable sealing performance capable of meeting working condition of ultrahigh pressure and is small in abrasion and long in service life; as the valve needle and the valve stem are in a split structure, the valve needle cannot rotate along with the valve needle but moves axially only during rotation of the valve stem, and abrasion of the seal components is lowered, the service life of the needle valve is prolonged, resistance to on and off of the needle valve is reduced, and the needle valve is convenient to regulate and labor-saving in operation.
Description
Technical field
The present invention relates to the sealing configuration of needle-valve technical field, particularly a kind of ultra-high pressure needle valve.
Background technique
Needle-valve is a kind of of throttle valve, mainly is made up of valve body, valve rod, needle and bonnet, and valve body is provided with valve seat, needle links to each other with valve rod, be threaded between valve rod and the bonnet, rotary valve rod can change the area of passage between needle and the valve seat, realizes blocking or regulating the flow of medium.Sealing between needle and the valve seat is to rely on closely cooperating between the conical surface of needle and the valve seat to reach.Needle and the valve rod of existing needle-valve mostly are integral structure, be provided with packing seal between valve rod or needle and bonnet or the valve body, cause the frictional force between valve rod and the filler big, rotary valve rod is dumb, open or the throttle down effort wearing and tearing that increased valve rod and filler simultaneously; And existing sealing configuration is bearing the phenomenon that the medium seepage can take place under the ultrahigh pressure operating mode, can not satisfy the demand of ultrahigh pressure operating mode.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, provide a kind of and can be applicable to the ultrahigh pressure operating mode, rational in infrastructure, long service life, the sealing configuration of the ultra-high pressure needle valve of good airproof performance.
Purpose of the present invention is achieved through the following technical solutions: a kind of sealing configuration of ultra-high pressure needle valve, comprise valve body, bonnet and valve rod, the valve rod lower end is equipped with needle, and the outside of needle is provided with Support cushion, be provided with seal ring between Support cushion and the valve body, Support cushion and seal ring are formed sealing group.
Described Support cushion is located on the needle, and seal ring is located on the Support cushion.
Described Support cushion is hat or J-shaped, and described seal ring is C shape ring or O shape ring.
The end of described sealing group is provided with support ring.
Be provided with one or more groups sealing group along the needle axial direction between described needle and the valve body.
Described Support cushion is composition bronze or high molecular polymer, and seal ring is metal alloy or rubber ring, and support ring is composition bronze or metallic material.
The lower end of described valve rod is provided with cavity, and the lower end of cavity is mounting hole, and the end of needle is installed in the mounting hole, is provided with ball in the cavity, and ball is located between needle and the valve rod.
The end of described needle is buckled in the mounting hole of valve rod.
The present invention has the following advantages: sealability of the present invention is reliable, can satisfy the operating mode of ultrahigh pressure, and wear extent is little, long service life; Needle and valve rod adopt and divide body structure, needle is buckled in the mounting hole of valve rod, and be provided with ball between needle and the valve rod, when valve rod rotated, needle did not rotate with valve rod, only axially move, thereby reduced the wearing and tearing of sealing group, prolonged the working life of needle-valve, reduced the resistance of needle-valve opening and closing simultaneously, easy to adjust, rapid operation.
Description of drawings
Fig. 1 is structural representation of the present invention
Among the figure, 1-valve body, 2-bonnet, 3-valve rod, 4-needle, 5-Support cushion, 6-seal ring, 7-support ring, 8-ball, 9-valve seat, 10-cavity, 11-mounting hole.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of sealing configuration of ultra-high pressure needle valve, comprise valve body 1, bonnet 2 and valve rod 3, bonnet 2 is fixedly arranged on the valve body 1, and valve rod 3 and bonnet 2 are by being threaded, valve rod 3 lower ends are equipped with needle 4, valve body 1 is provided with the valve seat 9 that cooperates with needle 4, and the outer wall ring set that valve rod 3 is provided with the bottom of helical thread portion has Support cushion 5, and the outer ring of Support cushion 5 is with seal ring 6,1 of Support cushion 5 and valve body are by 6 sealings of sealing ring, and Support cushion 5 is formed sealing group with seal ring 6.
Be provided with one or more groups sealing group along needle 4 axial directions between described needle 4 and the valve body 1, the end of sealing group is provided with support ring 7, and when the sealing group of group more than arranging, support ring 7 arranges at interval with sealing group.
Described Support cushion 5 is hat or J-shaped, and described seal ring 6 is C shape ring or O shape ring.
Described Support cushion 5 is composition bronze or high molecular polymer, and seal ring 6 is metal alloy or rubber ring, and support ring 7 is composition bronze or metallic material.The lower end of described valve rod 3 is provided with cavity 10, and the lower end of cavity 10 is mounting hole 11, and the end of needle 4 is installed in the mounting hole 11, is provided with ball 8 in the cavity 10, and ball 8 is located between needle 4 and the valve rod 3.
The end of described needle 4 is buckled in the mounting hole 11 of valve rod 3.
Working procedure of the present invention is as follows: sealing group has realized the sealing of needle-valve, adopts sealing group to cooperate with support ring 7, has guaranteed stability and the reliability of sealing configuration, can adapt to the operating mode of ultrahigh pressure; During the metering pin valve aperture, valve rod 3 rotations divide body structure because needle 4 adopts with valve rod 3, and needle 4 is buckled in the mounting hole 11 of valve rod 3, and be provided with ball 8 between needle 4 and the valve rod 3, needle 4 with valve rod 3 rotations, does not only axially move, thereby has reduced the wearing and tearing of sealing group, prolonged the working life of needle-valve, reduced the resistance of needle-valve opening and closing simultaneously, easy to adjust, rapid operation.
Claims (1)
1. the sealing configuration of a ultra-high pressure needle valve, comprise valve body (1), bonnet (2) and valve rod (3), bonnet (2) is fixedly arranged on the valve body (1), valve rod (3) and bonnet (2) are by being threaded, it is characterized in that: the lower end of valve rod (3) is provided with cavity (10), be provided with ball (8) in the cavity (10), the lower end of cavity (10) is mounting hole (11), the end of needle (4) is buckled in the mounting hole (11), ball (8) is positioned between needle (4) and the valve rod (3), during valve rod (3) rotation, needle (4) does not rotate with valve rod (3), only axially move, also be provided with the valve seat (9) that cooperates with needle (4) on the valve body (1), the external rings of needle (4) is with hat or the J-shaped Support cushion of being made by composition bronze or high molecular polymer (5), Support cushion (5) outer ring is with C shape ring or the O shape ring seal ring of being made by metal alloy or rubber (6), Support cushion (5) is formed sealing group with seal ring (6), the end of sealing group is provided with the support ring of being made by composition bronze or metallic material (7), be provided with one or more groups sealing group along needle (4) axial direction, support ring (7) arranges at interval with sealing group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210123745 CN102644760B (en) | 2012-04-26 | 2012-04-26 | Sealing structure of ultrahigh-pressure needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210123745 CN102644760B (en) | 2012-04-26 | 2012-04-26 | Sealing structure of ultrahigh-pressure needle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102644760A CN102644760A (en) | 2012-08-22 |
| CN102644760B true CN102644760B (en) | 2013-08-28 |
Family
ID=46657768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210123745 Expired - Fee Related CN102644760B (en) | 2012-04-26 | 2012-04-26 | Sealing structure of ultrahigh-pressure needle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102644760B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046898B (en) * | 2012-12-20 | 2015-04-08 | 西南石油大学 | Novel valve needle of pressure control drilling throttle valve |
| CN103939620A (en) * | 2014-04-18 | 2014-07-23 | 西南石油大学 | Ultrahigh pressure high-temperature needle valve |
| CN105257829B (en) * | 2015-10-15 | 2017-07-07 | 上海市计量测试技术研究院 | A kind of ultra high pressure stop valve |
| CN107989577B (en) * | 2017-12-05 | 2020-04-07 | 重庆前卫科技集团有限公司 | Needle valve for underwater horizontal Christmas tree |
| CN109139937A (en) * | 2018-10-10 | 2019-01-04 | 特阀江苏流体机械制造有限公司 | A kind of double isolation needle-valves of super-pressure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2486939A (en) * | 1944-08-02 | 1949-11-01 | Phillips Petroleum Co | Stuffing box |
| GB1048826A (en) * | 1962-11-09 | 1966-11-23 | Hymatic Eng Co Ltd | Improvements relating to fluid control stop valves |
| US3801112A (en) * | 1970-05-13 | 1974-04-02 | Ethylene Plastique Sa | Gland packings |
| GB1512460A (en) * | 1974-09-19 | 1978-06-01 | Basf Ag | Sealed spindle drive having particular utility for high pressure shut-off valve units and other control valve units |
| US4299395A (en) * | 1980-04-21 | 1981-11-10 | Reed Lehman T | Geothermal well head assembly |
| EP0263042A1 (en) * | 1986-09-26 | 1988-04-06 | Le Carbone Lorraine | Sealing system between a spindle and valve housing, and extractable cup therefor |
| CN102252099A (en) * | 2011-06-30 | 2011-11-23 | 朱成伟 | Valve rod |
| CN202520972U (en) * | 2012-04-26 | 2012-11-07 | 西南石油大学 | Sealing structure for ultra-high-pressure needle valve |
-
2012
- 2012-04-26 CN CN 201210123745 patent/CN102644760B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2486939A (en) * | 1944-08-02 | 1949-11-01 | Phillips Petroleum Co | Stuffing box |
| GB1048826A (en) * | 1962-11-09 | 1966-11-23 | Hymatic Eng Co Ltd | Improvements relating to fluid control stop valves |
| US3801112A (en) * | 1970-05-13 | 1974-04-02 | Ethylene Plastique Sa | Gland packings |
| GB1512460A (en) * | 1974-09-19 | 1978-06-01 | Basf Ag | Sealed spindle drive having particular utility for high pressure shut-off valve units and other control valve units |
| US4299395A (en) * | 1980-04-21 | 1981-11-10 | Reed Lehman T | Geothermal well head assembly |
| EP0263042A1 (en) * | 1986-09-26 | 1988-04-06 | Le Carbone Lorraine | Sealing system between a spindle and valve housing, and extractable cup therefor |
| CN102252099A (en) * | 2011-06-30 | 2011-11-23 | 朱成伟 | Valve rod |
| CN202520972U (en) * | 2012-04-26 | 2012-11-07 | 西南石油大学 | Sealing structure for ultra-high-pressure needle valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102644760A (en) | 2012-08-22 |
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Granted publication date: 20130828 Termination date: 20160426 |