CN203703342U - Dead wedge prevention structure of upper sealing conical surface of valve - Google Patents
Dead wedge prevention structure of upper sealing conical surface of valve Download PDFInfo
- Publication number
- CN203703342U CN203703342U CN201420006544.4U CN201420006544U CN203703342U CN 203703342 U CN203703342 U CN 203703342U CN 201420006544 U CN201420006544 U CN 201420006544U CN 203703342 U CN203703342 U CN 203703342U
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- CN
- China
- Prior art keywords
- valve
- upper sealing
- dead
- wedge
- valve rod
- 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.)
- Expired - Fee Related
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- Lift Valve (AREA)
Abstract
The utility model discloses a dead wedge prevention structure of an upper sealing conical surface of a valve. The technical key points are that a disk spring is arranged below a thrust bearing below a convex shoulder of a valve rod nut; after a valve is opened, the upper sealing conical surface of the valve is protected by deformation and compensation capabilities of the valve; and an upper backing ring and a lower backing ring, high in hardness and serving as supporting surfaces of the disk spring, are disposed above and below the disk spring respectively. The beneficial effects of the structure are that when the valve is opened, a user can safely use the upper sealing structure without worrying a dead wedge phenomenon of the upper sealing surface, so that dual safe functions of sealing are formed by the upper sealing structure and a filling material structure; meanwhile, filling material is protected after fitting of the upper sealing surface so as to be improved in effective service life; and moreover, the user can fully open the valve to make the upper sealing surface stay in a sealed state to add or replace filling material.
Description
Technical field
The utility model relates to a kind of valve mechanism, is specifically related to a kind of dead structure of sealing surface wedge on valve that prevents.
Background technique
The upper sealing configuration of valve is arranged on the below of stuffing box, its effect is: when after valve opening, conical seal (contact) face between valve rod and valve gap (or upper seal support) mutually coincide and reaches sealing state, thereby form with the filling-material structure on its top " dual fail-safe " that seal, guarantee that stuffing box position can not produce medium and leak; Meanwhile, after upper sealing surface coincide, be also a kind of protection to filler, make filler not with medium contact, filler, not in artesian condition, is conducive to extend the actual life of filler; In addition, in the time that user need to add or change filler, valve rod is opened to foot and make upper sealing surface reach sealing state just can to operate.
As from the foregoing, the function and efficacy of upper sealing structure of valve is apparent, but in the practical application of many valve products, existing product especially product uses at high temperature media as the high temperature cut-off valve in thermal power plant and stop valve, the mode of operation that user generally adopts, be down to move back several millimeters again after valve rod is up reached to top, valve is in the time of normal opening state, and upper sealing surface does not use.Trace it to its cause, be for prevent valve rod open foot after upper sealing surface produce the dead phenomenon of wedge, valve is closed and extremely cannot be operated because of upper sealing surface wedge once needs.
The reason that existing product valve rod is opened the dead phenomenon of the rear upper sealing surface generation wedge of foot is: after valve opening, the originally rising of the part in the condition of high temperature of valve rod hypomere enters atmosphere environment, and valve rod temperature reduces gradually makes shaft length shorten and cause sealing surface wedge dead.After valve opening, upper sealing surface is for avoiding wedge extremely to abandon using, the auxiliary seal effect that makes upper sealing surface can not be brought into play, and make filler position all the time in the contacting of system media, shorten the actual life of filler, once seepage appears in filler, tend to be made to leak aggravation because filler washes out gradually.
Summary of the invention
In order to overcome the existing above-mentioned deficiency of existing product, the utility model provides a kind of structure that can prevent the dead phenomenon of sealing surface generation wedge on valve.
To achieve these goals, the utility model is by the following technical solutions:
The anti-wedge fast knot of sealing cone structure on a kind of valve, it comprise with the valve rod of upper sealing male cone (strobilus masculinus) (1), be positioned at the top of the upper sealing of valve rod (1) male cone (strobilus masculinus) and with the valve gap of upper sealing inner conical surface or upper seal support (2), the upper end that is installed on valve rod (1) and cylindrical with the Stem Mut (7) of cylindrical convex shoulder, be positioned at thrust-bearing (6), upper gasket ring (5), belleville spring (4), the lower gasket ring (3) of Stem Mut (7) convex shoulder below.It is characterized in that: below the thrust-bearing (6) of Stem Mut (7) convex shoulder below, belleville spring (4) is set, is separately installed with in the upper and lower side of belleville spring (4) upper gasket ring (5) and the lower gasket ring (3) that hardness is higher.
The beneficial effects of the utility model are: when valve opening, user can use sealing configuration that valve rod is held to foot and needn't be worried that the dead phenomenon of wedge can occur upper sealing surface relievedly, thereby can make sealing configuration and filling-material structure form " dual fail-safe " of sealing, guarantee that stuffing box position can not produce medium and leak; Meanwhile, upper sealing surface also can form protection to filler after coincideing, and makes filler not with medium contact, not in artesian condition, is conducive to extend the actual life of filler; In addition, thus user can open valve rod foot makes upper sealing surface reach sealing state to add or change the operation of filler.
Accompanying drawing explanation
Accompanying drawing is the anti-wedge fast knot of sealing cone structure on the valve that provides of the utility model.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is further elaborated.
As shown in the figure, be a kind of structure that can prevent the dead phenomenon of sealing surface generation wedge on valve provided by the utility model.This structure comprises: position on the lower side with on seal the valve rod (1) of male cone (strobilus masculinus), be positioned at the top of the upper sealing of valve rod (1) male cone (strobilus masculinus) valve gap or upper seal support (2) with upper sealing inner conical surface, be installed on the Stem Mut (7) with cylindrical convex shoulder on the upper end of valve rod (1) and cylindrical, between Stem Mut (7) and valve rod (1), engage and make rotatablely moving of Stem Mut (7) be converted into the straight line motion of valve rod (1) with trapezoidal thread, there is thrust-bearing (6) Stem Mut (7) convex shoulder below, upper gasket ring (5), belleville spring (4), lower gasket ring (3), thrust-bearing (6) can adopt thrust roller bearing according to load condition, thrust ball bearing, smaller diameter valve can adopt needle roller thrust bearing or antifriction pad, belleville spring decides the thickness of spring sheet according to payload and medium temperature situation, compound mode (superimposed or involutory) and quantity.The key point that the utility model is dealt with problems is: below the thrust-bearing (6) below the convex shoulder of Stem Mut (7), belleville spring (4) is set; Be separately installed with in the upper and lower side of belleville spring (4) upper gasket ring (5) and the lower gasket ring (3) that hardness is higher.The effect that wherein increases upper gasket ring (5) is in order to produce excessive abrasion or damage because localized stress is too high to bearing transfer charge, the rolling element of avoiding bearing or raceway equably, and the effect that increases lower gasket ring (3) is for fear of allowing belleville spring (4) be bearing in compared with on soft supporting surface and produce wide impression and cause distortion and the compensation ability of belleville spring (4) to reduce.
After valve opening, when the temperature of valve rod (1) reduces, when shorten length, the compress variation of belleville spring (4) can increase, Stem Mut (7) moves down, thereby the distortion having by belleville spring (4) and compensation ability can be avoided between valve rod (1) and the upper sealing surface of valve gap or upper seal support (2), because of the violent increase of contact stress, that wedge occurs is dead, user can use sealing configuration that valve rod is opened to foot relievedly, and the function and efficacy of sealing configuration is fully played.
Below by reference to the accompanying drawings embodiment of the present utility model is described, but these explanations can not be understood to limit scope of the present utility model.Those skilled in the art should know; the utility model is not restricted to the described embodiments; its protection domain is defined by appending claims; any not exceeding the various changes in the scope that the utility model claims define, the technological scheme that modification forms; all do not depart from spirit and scope of the present utility model, within still can belonging to claim scope of the present utility model.
Claims (1)
1. the anti-wedge fast knot of sealing cone structure on a valve, it comprises with the valve rod of upper sealing male cone (strobilus masculinus) (1), be positioned at the top of the upper sealing of valve rod (1) male cone (strobilus masculinus) valve gap or upper seal support (2) with upper sealing inner conical surface, be installed on the upper end of valve rod (1) and the cylindrical Stem Mut (7) with cylindrical convex shoulder, be positioned at the thrust-bearing (6) of Stem Mut (7) convex shoulder below, upper gasket ring (5), belleville spring (4), lower gasket ring (3), it is characterized in that: below the thrust-bearing (6) of Stem Mut (7) convex shoulder below, belleville spring (4) is set, upper at belleville spring (4), downside is separately installed with upper gasket ring (5) and the lower gasket ring (3) that hardness is higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006544.4U CN203703342U (en) | 2014-01-06 | 2014-01-06 | Dead wedge prevention structure of upper sealing conical surface of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420006544.4U CN203703342U (en) | 2014-01-06 | 2014-01-06 | Dead wedge prevention structure of upper sealing conical surface of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203703342U true CN203703342U (en) | 2014-07-09 |
Family
ID=51053787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420006544.4U Expired - Fee Related CN203703342U (en) | 2014-01-06 | 2014-01-06 | Dead wedge prevention structure of upper sealing conical surface of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203703342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285227A (en) * | 2019-06-20 | 2019-09-27 | 苏州纽威阀门股份有限公司 | The assembly method of valve seat and valve body, the assembly method of smaller diameter valve and valve |
| CN110319228A (en) * | 2018-03-29 | 2019-10-11 | 四川农业大学 | A kind of adjustable resistance single piece type ball valve |
-
2014
- 2014-01-06 CN CN201420006544.4U patent/CN203703342U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319228A (en) * | 2018-03-29 | 2019-10-11 | 四川农业大学 | A kind of adjustable resistance single piece type ball valve |
| CN110319228B (en) * | 2018-03-29 | 2024-04-19 | 四川农业大学 | Resistance-variable one-piece ball valve |
| CN110285227A (en) * | 2019-06-20 | 2019-09-27 | 苏州纽威阀门股份有限公司 | The assembly method of valve seat and valve body, the assembly method of smaller diameter valve and valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20180106 |