CN102853089A - Low-temperature stop valve - Google Patents
Low-temperature stop valve Download PDFInfo
- Publication number
- CN102853089A CN102853089A CN2012103695126A CN201210369512A CN102853089A CN 102853089 A CN102853089 A CN 102853089A CN 2012103695126 A CN2012103695126 A CN 2012103695126A CN 201210369512 A CN201210369512 A CN 201210369512A CN 102853089 A CN102853089 A CN 102853089A
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- valve
- valve rod
- stem mut
- rod
- gap
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Abstract
The invention discloses a low-temperature stop valve which can reduce the manufacturing cost. The low-temperature stop valve comprises a valve body, a valve cover, a valve core and a valve rod which is connected with the valve core, wherein a stuffing box is arranged between the valve rod and the valve cover; the valve rod is in threaded connection with a valve rod nut; the valve rod nut is fixed relative to the valve cover; the valve rod nut is positioned in a pressure-bearing area between the stuffing box and the valve core and is fixedly connected to the valve cover; a shaft shoulder is arranged on the valve rod; chamfering matched with the shaft shoulder is arranged on the valve rod nut so as to form conical sealing; and when the valve core is completely opened, the valve rod nut, the valve cover and the valve rod are matched to form a sealing structure. The filler can be conveniently replaced, and the valve can be conveniently maintained. According to the structural design, the lengths of the valve rod and the bracket can be shortened, and the manufacturing cost is reduced.
Description
Technical field
The present invention relates to a kind of stop valve, especially a kind of cryogenic globe valve.
Background technique
The valve mechanism of common stop valve comprises valve body, valve gap, spool and the valve rod that is connected with spool, be provided with stuffing box between valve rod and the valve gap, valve rod is threaded with Stem Mut, Stem Mut is fixed on the valve gap, the end of valve rod is provided with handwheel, rotates handwheel, and valve rod moves up and down in certain stroke range along Stem Mut, thereby the regulating spool aperture realizes valve opening or closes.
The Stem Mut of common stop valve is installed in beyond the pressure-bearing zone, is mainly used in normal temperature condition.But, when being used for cryogenic conditions, according to standard-required, same size, valve in the uniform pressure situation, the length of the elongated portion that the ice chest of valve is used has specific requirement, remains in the nominal temperature range of the filling material that allows operation, at this moment because must guarantee the temperature of stem packing, if still adopt the valve mechanism of common stop valve, Stem Mut is installed in beyond the pressure-bearing zone, then must increases the length of valve rod and support, increase manufacture cost.
Summary of the invention
Longer in order to overcome existing stop valve valve rod and support, the deficiency that manufacture cost is higher, technical problem to be solved by this invention provide a kind of cryogenic globe valve that can reduce manufacture cost.
The technical solution adopted for the present invention to solve the technical problems is: cryogenic globe valve, comprise valve body, valve gap, spool and the valve rod that is connected with spool, be provided with stuffing box between valve rod and the valve gap, valve rod is threaded with Stem Mut, Stem Mut is fixed with respect to valve gap, in the pressure-bearing zone of described Stem Mut between stuffing box and spool and be fixedly connected on the valve gap.The stop valve of this structure is compared with the structure that adopts similar common stop valve, because Stem Mut directly is fixedly connected on the valve gap, therefore avoid the again fixed support of connection valve stem nut on valve gap, guaranteeing that the elongated portion length that ice chest is used meets under the prerequisite of standard-required, can shorten the length of valve rod and holder part, reduce valve rod and support materials amount, thereby reduced manufacture cost.
Further be, be provided with the shaft shoulder at described valve rod, be provided with the chamfering that cooperates with the described shaft shoulder on the Stem Mut, form conical surface seal, to reach preferably sealing effect.
Preferred described Stem Mut is copper nut, utilizes the good ductility of copper to reach preferably sealing effect.
Further be that described Stem Mut is threaded with valve gap and is fixedly connected with valve gap by Cock screw, is convenient to dismounting.
The invention has the beneficial effects as follows: can shorten valve rod and holder part length, reduce manufacture cost; Stem Mut can have two kinds of effects concurrently simultaneously: the one, and basic gearing to valve rod transmission axial force, is ordered about valve rod and is moved up and down, thereby realizes the valve opening closing function; The 2nd, seal action is processed with sealing surface at Stem Mut, in the situation that valve need to be changed filler, can poppet stem, and realize sealing function.
Description of drawings
Fig. 1 is the structural drawing of common stop valve.
Fig. 2 is the structural drawing of common cryogenic globe valve.
Fig. 3 is the structural drawing of cryogenic globe valve of the present invention.
Fig. 4 is the enlarged diagram of conical surface seal position m section among Fig. 3.
Be labeled as 1-valve body, 2-spool, 3-stuffing box among the figure, the 4-valve gap, 5-valve rod, 6-Stem Mut, 7-Cock screw, the 8-handwheel, 9-filler pressing sleeve, 10-Gland, 10 '-Gland, the 11-upper seal support, 12-flap pressure cap, 13-stem bearing, 14-pad, the 15-bearing, 16-pressure cap, 17-spring, the 51-shaft shoulder, 61-chamfering, the elongated portion length that the L-ice chest is used.
Embodiment
The present invention is further described below in conjunction with accompanying drawing.
As shown in Figure 1, common stop valve, on the support that Stem Mut is installed in valve gap is connected, if use this kind structural design cryogenic globe valve, as shown in Figure 2, owing to must guarantee the elongated portion length L that ice chest is used, valve rod is very long, and the structure that fixes Stem Mut by support more just seems economical not.
Such as Fig. 3, shown in Figure 4, cryogenic globe valve of the present invention comprises valve body 1, valve gap 4, spool 2 and the valve rod 5 that is connected with spool 2, valve body 1 is connected with valve gap 4 flanges, be provided with stuffing box 3 between valve rod 5 and the valve gap 4, the filler that is filled with in the stuffing box 3 is fixed by filler pressing sleeve 9 and Gland 10 ', the Stem Mut 6 that valve rod 5 adopts is copper nut, in the pressure-bearing zone of described Stem Mut 6 between stuffing box 3 and spool 2: Stem Mut 6 is processed with outside thread and is had in the through hole of the internal thread that is complementary by the flange facing screw-in valve gap 4 of valve gap 4 with valve body 1, and be fixedly connected with valve gap 4 by Cock screw 7, Stem Mut 6 contacts with the interior edge face of valve gap 4 away from the end face of spool 2, be provided with the shaft shoulder 51 on the valve rod 5, be provided with the chamfering 61 that cooperates with the described shaft shoulder 51 on the Stem Mut 6, form conical surface seal.
Its assembling scheme is, at first Stem Mut 6 is installed on the valve gap 4, and is threaded to Stem Mut 6 and contacts with the interior edge face of valve gap 4, then joins and makes screw and with Cock screw 7 standing valve stem nuts 6, prevent that it from getting loose, and then processes the chamfering 61 of Stem Mut 6.
Claims (4)
1. cryogenic globe valve, comprise valve body (1), valve gap (4), spool (2) and the valve rod (5) that is connected with spool (2), be provided with stuffing box (3) between valve rod (5) and the valve gap (4), valve rod (5) is threaded with Stem Mut (6), Stem Mut (6) is fixed with respect to valve gap (4), it is characterized in that: described Stem Mut (6) is positioned at the pressure-bearing zone between stuffing box (3) and the spool (2) and is fixedly connected on the valve gap (4).
2. cryogenic globe valve as claimed in claim 1 is characterized in that: be provided with the shaft shoulder (51) on the described valve rod (5), be provided with the chamfering (61) that cooperates with the described shaft shoulder (51) on the Stem Mut (6).
3. cryogenic globe valve as claimed in claim 1 or 2, it is characterized in that: described Stem Mut (6) is copper nut.
4. cryogenic globe valve as claimed in claim 1 or 2, it is characterized in that: described Stem Mut (6) is threaded with valve gap (4) and is fixedly connected with valve gap (4) by Cock screw (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103695126A CN102853089A (en) | 2012-09-27 | 2012-09-27 | Low-temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103695126A CN102853089A (en) | 2012-09-27 | 2012-09-27 | Low-temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102853089A true CN102853089A (en) | 2013-01-02 |
Family
ID=47399938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103695126A Pending CN102853089A (en) | 2012-09-27 | 2012-09-27 | Low-temperature stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102853089A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141803A (en) * | 2013-05-08 | 2014-11-12 | 上海沪东造船阀门有限公司 | Ultralow-temperature stop valve suitable for liquified natural gas carrier |
| CN115628297A (en) * | 2022-11-14 | 2023-01-20 | 四川优机实业股份有限公司 | Oil lubrication plunger type plug valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714237A (en) * | 1986-05-14 | 1987-12-22 | Whitey Co. | Soft seat for metering valve |
| JP2004027581A (en) * | 2002-06-25 | 2004-01-29 | Meiwa Seisakusho:Kk | Underground hydrant |
| CN101889161A (en) * | 2007-12-07 | 2010-11-17 | 费希尔控制产品国际有限公司 | Apparatus and methods to align a closure member and a valve stem |
| CN202790571U (en) * | 2012-09-27 | 2013-03-13 | 四川优机实业股份有限公司 | Low temperature stop valve |
-
2012
- 2012-09-27 CN CN2012103695126A patent/CN102853089A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714237A (en) * | 1986-05-14 | 1987-12-22 | Whitey Co. | Soft seat for metering valve |
| JP2004027581A (en) * | 2002-06-25 | 2004-01-29 | Meiwa Seisakusho:Kk | Underground hydrant |
| CN101889161A (en) * | 2007-12-07 | 2010-11-17 | 费希尔控制产品国际有限公司 | Apparatus and methods to align a closure member and a valve stem |
| CN202790571U (en) * | 2012-09-27 | 2013-03-13 | 四川优机实业股份有限公司 | Low temperature stop valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141803A (en) * | 2013-05-08 | 2014-11-12 | 上海沪东造船阀门有限公司 | Ultralow-temperature stop valve suitable for liquified natural gas carrier |
| CN115628297A (en) * | 2022-11-14 | 2023-01-20 | 四川优机实业股份有限公司 | Oil lubrication plunger type plug valve |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130102 |