CN104265939A - Double seal structure of plug valve shaft - Google Patents
Double seal structure of plug valve shaft Download PDFInfo
- Publication number
- CN104265939A CN104265939A CN201410508655.XA CN201410508655A CN104265939A CN 104265939 A CN104265939 A CN 104265939A CN 201410508655 A CN201410508655 A CN 201410508655A CN 104265939 A CN104265939 A CN 104265939A
- Authority
- CN
- China
- Prior art keywords
- valve shaft
- valve
- bearing
- seal structure
- adjustable
- 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
- F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
- F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
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- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Abstract
The invention discloses a double seal structure of a plug valve shaft. The seal structure comprises a valve shaft, a bearing, an adjustable V-shaped filler, a first O-shaped ring, a plane sliding bearing, an encapsulation bulge, a valve body and a valve core, wherein the valve shaft is inserted in the bearing at the upper middle end of a rotary plug valve shaft, the adjustable V-shaped filler is arranged on the periphery of the valve shaft, and the bottom end of the valve shaft is connected with the valve core in the valve body. According to the double seal structure of the plug valve shaft, the double seal structure is designed on the upper valve shaft of the plug valve, so as to ensure that the valve shaft and the bearing can operate under a lubricating and cleaning condition, therefore the torsion of the valve can be reduced, the reliability that the valve is not leaked can be improved, and the service life of the valve can be prolonged at the same time.
Description
Technical field
The present invention relates to rotary valve applied technical field, especially a kind of plug valve shaft double sealing structure.
Background technique
The special construction design of stopcock makes it in sewage treatment industry application widely, but, on the one hand, in the use of reality, the medium in sewage is once enter into the gap of valve shaft and bearing, and the torsion of valve can increase, too increase the fretting wear of axle and bearing simultaneously, reduce working life.The double sealing structure impurity well solved in sewage enters the problem of valve shaft and bearing play, ensure to run lubricating in clean environment between valve shaft and bearing, torsion can not increase, and working life is also longer, also substantially increases the reliability that valve does not leak outside simultaneously.
On the other hand, stopcock is in the use of reality, and the body cavity of common square opening stopcock is not smooth transition, and the impurity in medium is easy to deposit at the inner chamber of valve body, and when after the too much impurity of deposition, impurity can affect the normal operation of valve.Producer is had to be the problem being intersected the smooth transition of the runner improving body cavity by two orthogonal cylinders at present, because the diameter of two cylinders is different, though the runner that makes moderate progress after therefore intersecting still is not smooth transition.The present invention be utilize orthogonal circular cone and cylinder tangent, cutting out mutually is smooth transition certainly, the deposition of the impurity in the medium just well avoided in the use of reality like this.
Prior art can not meet the needs of people, for making up prior art deficiency, it is simple that the present invention aims to provide a kind of structure, only increase little processing cost, well solve the problem of valve in use torsion increase in actual use, add the reliability that medium does not leak outside, extend the plug valve shaft double sealing structure in the working life of valve simultaneously.
For achieving the above object, the present invention by the following technical solutions: a kind of plug valve shaft double sealing structure, at least comprises valve shaft, bearing, adjustable v-type filler, an O type circle, plane sliding bearing, encapsulate projection, valve body and spool; Described valve shaft inserts and is arranged in the bearing of upper end in rotating piston valve shaft, and valve shaft periphery is provided with adjustable v-type filler, and valve shaft bottom connects with the spool be arranged in valve body; A described O type circle and encapsulate projection are all arranged on plane sliding bearing near media end.
As optimisation technique scheme of the present invention, described adjustable v-type filler and an O type circle are separately positioned on the nearly media end of bearing and media end far away; Described body cavity becomes smooth transition structure.
Compared with prior art, the invention has the beneficial effects as follows: this plug valve shaft double sealing structure, the upper valve shaft of stopcock designs the structure of double seal, to guarantee to run in lubrication with under asking clean condition between valve shaft and bearing, reduce the torsion of valve, increase the reliability do not leaked outside of valve, extend the working life of valve simultaneously; Sealed by first, avoid the impurity in medium to enter the gap of bearing and valve shaft, second not to leak outside reliability to improve medium.Reach the impurity of valve in use in medium to deposit at the inner chamber of valve body simultaneously; Overall structure is simply compact, easily manufactured, practical, is easy to promote the use of.
Summary of the invention
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the close-up schematic view of A in Fig. 1;
Fig. 3 is the close-up schematic view of B in Fig. 2;
Fig. 4 is C-C standard-sized sheet structural representation of the present invention;
Fig. 5 is C-C full cut-off structural representation of the present invention;
Wherein: 1, valve shaft, 2, bearing, 3, adjustable v-type filler, the 4, the one O type circle, 5, plane sliding bearing, 6, encapsulate is protruding, 7, valve body, 8, spool.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 ~ 5, in the embodiment of the present invention, a kind of plug valve shaft double sealing structure, at least comprises valve shaft 1, bearing 2, adjustable v-type filler 3, an O type circle 4, plane sliding bearing 5, encapsulate projection 6, valve body 7 and spool 8; Described valve shaft 1 inserts and is arranged in the bearing 2 of upper end in rotating piston valve shaft, and valve shaft 1 periphery is provided with adjustable v-type filler 3, and valve shaft 1 bottom connects with the spool 8 be arranged in valve body 7; A described O type circle 4 and encapsulate projection 6 are all arranged on plane sliding bearing 5 near media end.
As optimisation technique scheme of the present invention, described adjustable v-type filler 3 and an O type circle 4 are separately positioned on the nearly media end of bearing and media end far away; Described valve body 7 inner chamber becomes smooth transition structure.
The present invention is when designing: the sealing pair designing one O type circle sealing and spool encapsulate end and plane sliding bearing at the nearly media end of bearing, one adjustable v-type packing seal is designed at the media end far away of bearing, the material of O type circle and the material of V-type filler according to the difference of medium, can select NBR, EPDM, VITON etc.
During valve design, increase a circular cone and valve body main structure cylindrical tangent, and form a smooth excessive runner, thus avoid the deposition of impurity in valve body in medium.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any reference character in claim should be considered as the claim involved by limiting.
The above; be only preferred embodiment of the present invention; not in order to limit the present invention, every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalently replace and improve, within the protection domain that all should be included in technical solution of the present invention.
Claims (2)
1. a plug valve shaft double sealing structure, at least comprises valve shaft (1), bearing (2), adjustable v-type filler (3), an O type circle (4), plane sliding bearing (5), encapsulate projection (6), valve body (7) and spool (8); It is characterized in that: described valve shaft (1) inserts and is arranged in the bearing (2) of upper end in rotating piston valve shaft, and valve shaft (1) periphery is provided with adjustable v-type filler (3), and valve shaft (1) bottom connects with the spool (8) be arranged in valve body (7); A described O type circle (4) and encapsulate projection (6) are all arranged on plane sliding bearing (5) near media end.
2. a kind of plug valve shaft double sealing structure according to claim 1, is characterized in that: described adjustable v-type filler (3) and an O type circle (4) are separately positioned on the nearly media end of bearing and media end far away; Described valve body (7) inner chamber becomes smooth transition structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508655.XA CN104265939A (en) | 2014-09-28 | 2014-09-28 | Double seal structure of plug valve shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508655.XA CN104265939A (en) | 2014-09-28 | 2014-09-28 | Double seal structure of plug valve shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265939A true CN104265939A (en) | 2015-01-07 |
Family
ID=52157493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410508655.XA Pending CN104265939A (en) | 2014-09-28 | 2014-09-28 | Double seal structure of plug valve shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113039353A (en) * | 2018-09-10 | 2021-06-25 | G.W.力士克有限公司 | Valve assembly and method |
| US11971106B2 (en) | 2023-02-07 | 2024-04-30 | G.W. Lisk Company, Inc. | Valve assembly and method |
-
2014
- 2014-09-28 CN CN201410508655.XA patent/CN104265939A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113039353A (en) * | 2018-09-10 | 2021-06-25 | G.W.力士克有限公司 | Valve assembly and method |
| CN113039353B (en) * | 2018-09-10 | 2023-09-29 | G.W.力士克有限公司 | Valve assembly and method |
| US11971106B2 (en) | 2023-02-07 | 2024-04-30 | G.W. Lisk Company, Inc. | Valve assembly and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |