CN101205977A - Double sealing high pressure needle valve - Google Patents
Double sealing high pressure needle valve Download PDFInfo
- Publication number
- CN101205977A CN101205977A CNA2007101645070A CN200710164507A CN101205977A CN 101205977 A CN101205977 A CN 101205977A CN A2007101645070 A CNA2007101645070 A CN A2007101645070A CN 200710164507 A CN200710164507 A CN 200710164507A CN 101205977 A CN101205977 A CN 101205977A
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- Prior art keywords
- seal
- valve
- high pressure
- soft
- pressure needle
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Abstract
The invention relates to a dual seal high pressure needle valve. A valve tip seal comprises a hard seal part and a soft seal part having different tapers, wherein the hard seal part is in line seal contact with the upper conical surface of a valve body seal opening, the soft seal part is in seal contact with the lower conical surface of the valve body seal opening, the valve tip and a valve stem are hitched together without revolution through a T-shaped slot. The seal structure adopts the dual seal of line hard seal and conical surface soft seal, and the hitching without revolution between the valve tip and the valve stem via the T-shaped slot. When a seal surface wears, the lower conical surface of the seal opening and the soft seal can compensate to prevent medium leakage, thereby overcoming the problems of 'running, emitting, dripping and leaking' lying in the prior single hard soft seat needle valve. The invention which has the advantages of good sealing performance and long service life is applicable to the instrument pipeline cutoff, discharging and sampling technical fields in industries like oil, chemical engineering, electric power, metallurgy, food, etc.
Description
Technical field
The present invention relates to a kind of high pressure needle valve, relate in particular to a kind of double sealing high pressure needle valve.
Background technique
Existing high-pressure needle valve sealing is by metal to metal or the nonmetal generation sealing of metal pair.The sealing of this structure is very high to the hardness requirement of valve point, and can't satisfy mixed gas and contain the medium needs of abrasive material, and then causes the phenomenon of " run, drip, leak " to produce.Valve rod integral structure particularly, because the wearing and tearing of the medium of revolution and abrasive material, the linear sealing that produces when it is closed is more and more wideer, long-term use can cause the interior leakage of needle-valve.For many years, under the situation that solves high pressure, needle type valve is closed sealed department and is leaked this difficult problem, has taked various methods both at home and abroad, such as, the angle of change taper, the selection of material performance does not have revolution and waits design etc.These measures have obtained certain effect to solving the needle-valve seal leakage, but fundamentally do not deal with problems as yet.
Summary of the invention
For overcoming the defective of existing high-pressure needle valve door sealing, the invention provides a kind of double sealing high pressure needle valve.This double sealing high pressure needle valve can the fine problem that solves high pressure needle valve sealing " run, drip, leak ".
The technology used in the present invention solution is: a kind of double sealing high pressure needle valve, comprise valve point, valve rod, the sealing of described valve point comprises the hard sealed department and the soft seal portion of different taperings, hard sealed department is linear sealing with the valve seal mouth top conical surface and contacts, and soft seal portion is sealing with the valve seal mouth bottom conical surface and contacts.
The further technical solution of the present invention is that described valve point does not have revolution with valve rod by T type groove and articulates, to improve anti-high-pressure shocking wave performance.
Because having revolution by T type groove, the double seal of hard sealing of above-mentioned sealing configuration employing line style and conical surface soft seal and valve point and valve rod do not articulate, when wearing and tearing appear in sealing surface, the sealed mouth bottom conical surface and soft seal (elastic seal ring) can be played compensating action, to prevent dielectric leakage, overcome the problem of " run, drip, leak " of existing single hard soft seat needle stand valve existence, and soft seal there is good seal action to ending of gas medium.Therefore the present invention has good seal performance, beneficial effects such as long service life.Be applicable to technical fields such as instrumentation pipelines such as oil, chemical industry, electric power, metallurgy, food end, release, sampling.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the overall structure schematic representation of an embodiment of the present invention;
Fig. 2 is the structural representation of a kind of embodiment of valve point hermetic unit among Fig. 1.
Among the figure: 1, valve body, 2, the O RunddichtringO, 3, the valve point, 4, valve rod, 5, bonnet, 6, filler, 7, O type filler, 8, gland nut, 9, the locking collar, 10, dust cover, 11, handgrip, 12, jackscrew, 13, locking pin.
Embodiment
Embodiment as shown in drawings, the high press seal needle-valve of double density of the present invention mainly comprises valve body 1, valve point 3, valve rod 4, bonnet 5 and handgrip 11, valve point 3 does not have revolution with valve rod 4 by T type groove and articulates.The sealing of valve point comprises hard sealed department and soft seal portion.The tapering of hard sealed department is greater than the tapering of soft seal portion, and the tapering of hard sealed department is consistent with the tapering on valve seal mouth top, is generally 60 ° ± 1 °, and the linear sealing contact produces potted line on the valve seal mouth; The tapering face of soft seal portion is consistent with the cone face of valve seal mouth bottom, be generally 40 ° ± 1 °, be machined to the dovetail groove assembling and go up fluororubber O-type seal ring 2, fluororubber O-type seal ring 2 is higher than valve point 3 cone faces, make its cone face of following valve body contact, produce another road potted line.
Claims (6)
1. double sealing high pressure needle valve, comprise valve point, valve rod, it is characterized in that the sealing of described valve point comprises the hard sealed department and the soft seal portion of different taperings, hard sealed department is linear sealing with valve seal mouth top tapering face and contacts, and soft seal portion is sealing with valve seal mouth bottom cone face and contacts.
2. double sealing high pressure needle valve according to claim 1 is characterized in that the tapering of the tapering of described hard sealed department greater than soft seal portion.
3. double sealing high pressure needle valve according to claim 1 and 2 is characterized in that described soft seal portion is the fluororubber O-type seal ring, and the fluororubber O-type seal ring is embedded in the dovetail groove of valve point soft seal portion, is higher than the valve sharp conical surface.
4. double sealing high pressure needle valve according to claim 2, the tapering that it is characterized in that described hard sealed department are 60 ° ± 1 °, and the tapering of described soft seal portion is 40 ° ± 1 °.
5. according to claim 1 or 2 or 4 described double sealing high pressure needle valves, it is characterized in that described valve point does not have revolution with valve rod by T type groove and articulates.
6. double sealing high pressure needle valve according to claim 3 is characterized in that described valve point does not have revolution with valve rod by T type groove and articulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101645070A CN101205977A (en) | 2007-11-27 | 2007-11-27 | Double sealing high pressure needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101645070A CN101205977A (en) | 2007-11-27 | 2007-11-27 | Double sealing high pressure needle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101205977A true CN101205977A (en) | 2008-06-25 |
Family
ID=39566371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101645070A Pending CN101205977A (en) | 2007-11-27 | 2007-11-27 | Double sealing high pressure needle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101205977A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963248A (en) * | 2010-09-10 | 2011-02-02 | 温州市金星阀门有限公司 | Double-stop discharge needle-shaped valve |
| CN101509563B (en) * | 2009-03-24 | 2011-06-22 | 温州市金星阀门有限公司 | Multifunction multipath multi-control high-pressure needle valve |
| CN102937189A (en) * | 2012-11-16 | 2013-02-20 | 镇江市华阳机电制造有限公司 | Needle valve with two-piece valve rods |
| CN103495254A (en) * | 2013-09-25 | 2014-01-08 | 泰州市久信医疗科技有限公司 | Needle valve used for breathing machine |
| CN103644306A (en) * | 2013-11-18 | 2014-03-19 | 江苏华太电力仪表有限公司 | Regulating valve of gas cooker |
| CN108869854A (en) * | 2018-08-24 | 2018-11-23 | 江苏华太电力仪表有限公司 | A kind of lift split-body valve hatpin valve |
| CN111577902A (en) * | 2019-02-18 | 2020-08-25 | 浙江盾安禾田金属有限公司 | Valve body assembly |
| CN112833201A (en) * | 2021-02-04 | 2021-05-25 | 河北墨峻科技有限公司 | Integral filling type needle valve |
-
2007
- 2007-11-27 CN CNA2007101645070A patent/CN101205977A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509563B (en) * | 2009-03-24 | 2011-06-22 | 温州市金星阀门有限公司 | Multifunction multipath multi-control high-pressure needle valve |
| CN101963248A (en) * | 2010-09-10 | 2011-02-02 | 温州市金星阀门有限公司 | Double-stop discharge needle-shaped valve |
| CN102937189A (en) * | 2012-11-16 | 2013-02-20 | 镇江市华阳机电制造有限公司 | Needle valve with two-piece valve rods |
| CN103495254A (en) * | 2013-09-25 | 2014-01-08 | 泰州市久信医疗科技有限公司 | Needle valve used for breathing machine |
| CN103644306A (en) * | 2013-11-18 | 2014-03-19 | 江苏华太电力仪表有限公司 | Regulating valve of gas cooker |
| CN103644306B (en) * | 2013-11-18 | 2016-08-17 | 江苏华太电力仪表有限公司 | A kind of regulation valve of kitchen range |
| CN108869854A (en) * | 2018-08-24 | 2018-11-23 | 江苏华太电力仪表有限公司 | A kind of lift split-body valve hatpin valve |
| CN111577902A (en) * | 2019-02-18 | 2020-08-25 | 浙江盾安禾田金属有限公司 | Valve body assembly |
| CN112833201A (en) * | 2021-02-04 | 2021-05-25 | 河北墨峻科技有限公司 | Integral filling type needle valve |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080625 |