CN103994273A - Valve rod sliding seal device - Google Patents
Valve rod sliding seal device Download PDFInfo
- Publication number
- CN103994273A CN103994273A CN201410230240.0A CN201410230240A CN103994273A CN 103994273 A CN103994273 A CN 103994273A CN 201410230240 A CN201410230240 A CN 201410230240A CN 103994273 A CN103994273 A CN 103994273A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- sliding bearing
- seal device
- graphite
- sliding seal
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to a valve rod sliding seal device. The valve rod sliding seal device comprises a valve rod and a sliding bearing arranged on the valve rod. The section shape of the sliding bearing is of an X shape. The circumferential surface of the sliding bearing is provided with continuous deformation grooves. The sliding bearing is formed by dipping stainless steel material TF-316 into PTFE for sintering. The defects that in the prior art, common graphite packing and metal mesh reinforced graphite are short in service life under the action of a periodic load, and the graphite is prone to fragmentation and leaks are overcome. According to the design, the correct position of the valve rod can be kept under the condition of normal operation of a valve or occurrence of a fire. Besides, the valve rod sliding seal device is simple in structure, reliable in sealing performance, low in friction coefficient and high in corrosion resistance.
Description
Technical field
The present invention relates to a kind of valve stem slides seal arrangement.
Background technique
The fire prevention solution of valve stem seal is to adopt graphite material to resist high temperature at present, even but the cyclic loading graphite of moderate strength also can bear and fragmentation.Lost sealability, broken graphite flake also can pollution medium.According to about experiment showed, that graphite packing and wire netting strengthen graphite, under the effect of periodic load, only after thousands of circulations, graphite just starts fragmentation and causes leaking.Do not meet international standard and industry standard.
Summary of the invention
In order to overcome in prior art common graphite packing and wire netting, to strengthen graphite short working life under the effect of periodic load, graphite is the broken and problem that causes leaking easily, the invention provides a kind of valve stem slides seal arrangement, this valve stem slides seal arrangement simple in structure, no matter be the normal operation of valve and fire tram that valve rod occurs to keep, its sealability is reliable, friction factor is low, corrosion-resistant property is strong.
The technical solution adopted for the present invention to solve the technical problems is: comprise valve rod and be arranged on the sliding bearing on valve rod, the section configuration of sliding bearing is X-shaped, on the circumferential surface of sliding bearing, have continuous deformation groove, sliding bearing soaks tetrafluoro sintering by stainless steel material.
The stainless steel material of sliding bearing is TF-316.
The present invention is by above-mentioned specific design, there is the tram that can both keep valve rod while no matter being the normal operation of valve and fire generation, the sliding bearing of X-shaped has reliable sealability, low friction factor and very strong corrosion-resistant property, it can guarantee valve rod zero leakage, and it is longer than adopting the life-span of conventional valve shaft seal to make life of valve, the sliding bearing of X-shaped also has dynamic seal (packing) ability, even when hydrodynamic pressure or edge load rising, the sliding bearing of X-shaped also can dynamically be adjusted, and prevents fugacity discharge.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, detailed content of the present invention is described.
Fig. 1 is the structural representation of the present invention under pressure-less state.
Fig. 2 is that the present invention is at the structural representation having under pressure state.
Fig. 3 is that the present invention is at the structural representation of edge load condition.
Embodiment
As shown in the figure, the present invention includes valve rod 1 and be arranged on the sliding bearing 2 on valve rod 1, the section configuration of sliding bearing 2 is X-shaped, has continuous deformation groove 3 on the circumferential surface of sliding bearing 2, sliding bearing 2 soaks tetrafluoro sintering by stainless steel material, and the stainless steel material of sliding bearing 2 is TF-316.Under use state, when Gland compresses, the compressed distortion of sliding bearing 2 of X-shaped, produce initial seal pressure with valve rod 1 and stuffing box, when being subject to pressure medium and doing the further compressed distortion of sliding bearing 2 of used time X-shaped, the seal pressure producing further strengthens, when seal pressure is greater than pressure medium, valve rod 1 is sealed with stuffing box, along with the different sealing specific pressure of pressure medium changes thereupon, has formed the state of dynamic seal (packing).Above-described embodiment is described the preferred implementation of valve stem slides seal arrangement of the present invention; not design and the scope of invention are limited; do not departing under the present invention program's prerequisite; various external form modification and improvement that those skilled in the art make technological scheme of the present invention, all should fall into the protection domain of valve stem slides seal arrangement of the present invention.
Claims (2)
1. a valve stem slides seal arrangement, comprise valve rod and be arranged on the sliding bearing on valve rod, the section configuration that it is characterized in that sliding bearing (2) is X-shaped, has continuous deformation groove (3) on the circumferential surface of sliding bearing (2), and sliding bearing (2) soaks tetrafluoro sintering by stainless steel material.
2. valve stem slides seal arrangement according to claim 1, the stainless steel material that it is characterized in that sliding bearing (2) is TF-316.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230240.0A CN103994273A (en) | 2014-05-28 | 2014-05-28 | Valve rod sliding seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230240.0A CN103994273A (en) | 2014-05-28 | 2014-05-28 | Valve rod sliding seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994273A true CN103994273A (en) | 2014-08-20 |
Family
ID=51308526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410230240.0A Pending CN103994273A (en) | 2014-05-28 | 2014-05-28 | Valve rod sliding seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103994273A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2451838Y (en) * | 2000-10-26 | 2001-10-03 | 上海气体阀门总厂 | Low-temperature high-pressure ball valve |
| JP3599427B2 (en) * | 1995-07-10 | 2004-12-08 | 株式会社クボタ | Shaft sealing device for butterfly valve |
| CN101730802A (en) * | 2007-06-01 | 2010-06-09 | Skf公司 | A bearing component for a rolling bearing or for a sliding bearing |
| CN102654202A (en) * | 2012-04-20 | 2012-09-05 | 浙江欧维克阀门有限公司 | High-temperature metal hard seal ball valve for granular media |
| CN203442165U (en) * | 2013-06-21 | 2014-02-19 | 厦门弗瑞特流体控制有限公司 | Improved structure of valve rod connection portion of vacuum butterfly valve |
| CN103671981A (en) * | 2012-09-01 | 2014-03-26 | 江苏海达船用阀业有限公司 | Combination seal structure rapid-closing valve |
| CN203892703U (en) * | 2014-05-28 | 2014-10-22 | 浙江威腾阀门有限公司 | Valve rod sliding sealing device |
-
2014
- 2014-05-28 CN CN201410230240.0A patent/CN103994273A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3599427B2 (en) * | 1995-07-10 | 2004-12-08 | 株式会社クボタ | Shaft sealing device for butterfly valve |
| CN2451838Y (en) * | 2000-10-26 | 2001-10-03 | 上海气体阀门总厂 | Low-temperature high-pressure ball valve |
| CN101730802A (en) * | 2007-06-01 | 2010-06-09 | Skf公司 | A bearing component for a rolling bearing or for a sliding bearing |
| CN102654202A (en) * | 2012-04-20 | 2012-09-05 | 浙江欧维克阀门有限公司 | High-temperature metal hard seal ball valve for granular media |
| CN103671981A (en) * | 2012-09-01 | 2014-03-26 | 江苏海达船用阀业有限公司 | Combination seal structure rapid-closing valve |
| CN203442165U (en) * | 2013-06-21 | 2014-02-19 | 厦门弗瑞特流体控制有限公司 | Improved structure of valve rod connection portion of vacuum butterfly valve |
| CN203892703U (en) * | 2014-05-28 | 2014-10-22 | 浙江威腾阀门有限公司 | Valve rod sliding sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140820 |