CN203927041U - Cryogenic globe valve - Google Patents
Cryogenic globe valve Download PDFInfo
- Publication number
- CN203927041U CN203927041U CN201420362976.9U CN201420362976U CN203927041U CN 203927041 U CN203927041 U CN 203927041U CN 201420362976 U CN201420362976 U CN 201420362976U CN 203927041 U CN203927041 U CN 203927041U
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- valve
- filler
- flap
- valve rod
- greasing
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Abstract
The utility model relates to a kind of cryogenic globe valve, comprises valve body, flap, valve rod, valve gap, handwheel, Sealing and assembling set, and valve flowing channel direction adopts high in and low out, and packing seal letter is installed between valve gap and valve rod, and valve gap adopts and lengthens neck structure; Be mainly that packing seal letter adopts upper filler and the dual pressing sealing structure of lower media assemblage, between upper filler and lower filler, vacuum ring be set, vacuum ring inner chamber is communicated with automatic greasing device, and the upper end of upper filler is provided with filler automatic compensator; Automatic greasing device is comprised of the signal emitter and the greasing solenoid valve that are arranged between lower filler and vacuum ring, and filler automatic compensator is comprised of the butterfly spring being arranged between Gland and hold-down grid; Between valve rod lower end and flap, adopt floating connection; The valve pocket inwall setting-in annular cylinder liner of valve body, annular cylinder liner sidewall is shaped with some circular holes, and upper and lower end face is fitted between valve gap and valve seat, and inwall coordinates with flap cylindrical wall is moving.Its sealability is reliable, is applicable to cryogenic media operating mode.
Description
Technical field
The utility model relates to valve field, particularly about a kind of stop valve.The utility model is applicable to cryogenic media operating mode.
Background technique
Stop valve is generally comprised of valve body, flap, valve rod, valve gap, handwheel, in valve pocket between valve body is imported and exported, be shaped with the sealing surface of seat cooperatively interacting with flap, valve rod lower end is connected with flap, valve rod upper end is fixedly connected with handwheel through Stem Mut, and packing seal letter is installed between valve gap and valve rod.For cryogenic globe valve, require valve to reach zero external leakage, the sealability of packing seal letter between valve rod and valve gap is required very high, in order to reduce medium temperature, affect the sealability of packing seal letter, general valve gap adopts lengthening neck structure.But in the long-term opening-closing process of valve, valve rod can produce wearing and tearing to packing seal letter, sealability between valve rod and valve gap is declined, there is medium and leak outside.In order to improve Reliability of Packing Seal, generally adopt and between stuffing box, increase by one greasing sealing, at present, greasing sealing is all between stuffing box, to adopt the artificial grease that injects, and strengthens the sealability between valve rod and valve gap.The shortcoming of this artificial greasing is cannot know when leaking appears in filler need to carry out greasing, and the valve using being installed on field, and artificial greasing is inconvenient, troublesome maintenance.Meanwhile, because valve gap is for lengthening neck structure, medium acts on the thrust on flap, and valve rod is produced to larger radially moment, this when radially moment has increased stem movement with packing seal letter between frictional force, the wearing and tearing of increasing valve rod to packing seal letter.
Summary of the invention
The purpose of this utility model is the problem existing for prior art, when the rear appearance leakage of filler wearing and tearing between a kind of valve rod and valve gap is provided, can carry out automatic greasing sealing, the reliable cryogenic globe valve of easy to maintenance, sealability.
The technical solution of the utility model comprises valve body, flap, valve rod, valve gap, handwheel, Sealing and assembling set, in valve pocket between valve body import and export, be shaped with the sealing surface of seat cooperatively interacting with flap, valve flowing channel direction adopts high in and low out, valve rod lower end is connected with flap, valve rod upper end is fixedly connected with handwheel through Stem Mut, packing seal letter is installed between valve gap and valve rod, and valve gap adopts and lengthens neck structure; Be mainly that packing seal letter adopts upper filler and the dual pressing sealing structure of lower media assemblage, between upper filler and lower filler, vacuum ring be set, vacuum ring inner chamber is communicated with automatic greasing device, and the upper end of upper filler is provided with filler automatic compensator; Described automatic greasing device is comprised of the signal emitter and the greasing solenoid valve that are arranged between lower filler and vacuum ring, and the control signal of signal emitter is connected in the power circuit of greasing solenoid valve; Described filler automatic compensator is comprised of the butterfly spring being arranged between Gland and hold-down grid; Between valve rod lower end and flap, adopt floating connection; The valve pocket inwall setting-in annular cylinder liner of valve body, the sidewall of this annular cylinder liner is shaped with some circular holes, and upper and lower end face is fitted between valve gap and valve seat, and inwall coordinates with flap cylindrical wall is moving.
One of advantage of the present utility model is that packing seal letter adopts dual pressing sealing structure, the middle vacuum ring of installing carries out greasing sealing, make lumen form triple seal structure, vacuum ring inner chamber is communicated with automatic greasing device, when occurring to leak, filler wearing and tearing automatically carry out greasing sealing, solved and be installed on the artificial greasing inconvenience of the valve using in field, problem difficult in maintenance, has improved the lumen sealing reliability between valve rod and valve gap;
Two of advantage of the present utility model is, in the upper end of upper filler, filler automatic compensator is set, and after filler is frayed, the elastic force automatic impaction packing seal letter of filler automatic compensator butterfly spring, keeps lumen sealability;
Three of advantage of the present utility model is the valve pocket inwall setting-in annular cylinder liners at valve body, this annular cylinder liner plays leading role to flap, overcome the radially moment that medium produces valve rod, reduce valve rod and move the wearing and tearing to packing seal letter, improve lumen sealing reliability, and there is adjust flux effect;
Four of advantage of the present utility model be flap floating connection on valve rod, pressure medium promotes flap and compresses sealing surface of seat, improves the sealability between flap and valve seat.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Cryogenic globe valve as shown in Figure 1, comprise valve body 1, flap 2, valve rod 3, valve gap 4, handwheel 14, Sealing and assembling set, in valve pocket between valve body 1 import and export, be shaped with the sealing surface of seat cooperatively interacting with flap 2, valve body 1 runner direction adopts high in and low out, be that valve body 1 outlet passage is below sealing surface of seat, valve body 1 inlet passage is above sealing surface of seat, valve rod 3 lower ends are connected with flap 2, valve rod 3 upper ends are fixedly connected with handwheel 14 through Stem Mut, between valve gap 4 and valve rod 3, packing seal letter is installed, valve gap 4 adopts and lengthens neck structure, to reduce the impact of medium temperature on packing seal letter.Packing seal letter adopts upper filler and the dual pressing sealing structure of lower media assemblage, between upper filler and lower filler, vacuum ring 5 is set, vacuum ring 5 inner chambers are communicated with automatic greasing device, make to form three seal structures between valve rod 3 and valve gap 4, and the upper end of upper filler is provided with filler automatic compensator.Described automatic greasing device is comprised of the signal emitter 8 and the greasing solenoid valve 10 that are arranged between lower filler and vacuum ring 5, the control signal of signal emitter 8 is connected in the power circuit of greasing solenoid valve 10, signal emitter 8 can be according to the different adopts pressure sensors of working medium or liquid sensor, gas transducer, the control signal of signal emitter 8 is by carrying joint 9 outputs, and greasing solenoid valve 10 is communicated with vacuum ring 5 by greasing joint 6.Instantly filler frayed after, medium leaks into signal emitter 8 places, signal emitter 8 is converted to electrical signal by the leakage medium signal detecting, and greasing solenoid valve 10 is opened vacuum ring 5 greasings.Described filler automatic compensator is comprised of the butterfly spring 7 being arranged between Gland 12 and hold-down grid 13, and after filler is frayed, the elastic force automatic impaction packing seal letter of butterfly spring 7, keeps the lumen sealability between valve rod 3 and valve gap 4.Between valve rod 3 lower ends and flap 2, adopt floating connection, be that flap 2 is arranged on the annular convex shoulder of valve rod 3 lower ends by connecting ring 11, connecting ring 11 endoporus coordinate with valve rod 3 peripheries are moving, the outside thread of connecting ring 11 coordinates with flap 2 back side inner hole threads, between the lower end surface of valve rod 3 lower end annular convex shoulders and flap 2 back sides, there is gap, after flap 2 sealing surfaces and valve base sealing surface wear, pressure medium promotes flap 2 automatic impaction valve base sealings.The valve pocket inwall setting-in annular cylinder liner 15 of valve body 1, the sidewall of this annular cylinder liner 15 is shaped with some circular holes, upper and lower end face is fitted between valve gap 4 and valve seat, inwall coordinates with flap 2 cylindrical walls are moving, 15 pairs of flaps 2 of annular cylinder play leading role, have overcome the radially moment that medium produces valve rod 3, reduce valve rod 3 and move the wearing and tearing to packing seal letter, meanwhile, annular cylinder 15 coordinates flow is regulated with flap 2.
Claims (1)
1. a cryogenic globe valve, comprise valve body (1), flap (2), valve rod (3), valve gap (4), handwheel (14), Sealing and assembling set, in valve pocket between valve body (1) import and export, be shaped with the sealing surface of seat cooperatively interacting with flap (2), valve body (1) runner direction adopts high in and low out, valve rod (3) lower end is connected with flap (2), valve rod (3) upper end is fixedly connected with handwheel (14) through Stem Mut, between valve gap (4) and valve rod (3), packing seal letter is installed, valve gap (4) adopts and lengthens neck structure; It is characterized in that packing seal letter adopts upper filler and the dual pressing sealing structure of lower media assemblage, between upper filler and lower filler, vacuum ring (5) is set, vacuum ring (5) inner chamber is communicated with automatic greasing device, and the upper end of upper filler is provided with filler automatic compensator; Described automatic greasing device is comprised of the signal emitter (8) and the greasing solenoid valve (10) that are arranged between lower filler and vacuum ring (5), the control signal of signal emitter (8) is connected in the power circuit of greasing solenoid valve (10), and described filler automatic compensator is comprised of the butterfly spring (7) being arranged between Gland (12) and hold-down grid (13); Between valve rod (3) lower end and flap (2), adopt floating connection; The valve pocket inwall setting-in annular cylinder liner (15) of valve body (1), the sidewall of this annular cylinder liner (15) is shaped with some circular holes, and upper and lower end face is fitted between valve gap (4) and valve seat, and inwall coordinates with flap (2) cylindrical wall is moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362976.9U CN203927041U (en) | 2014-06-25 | 2014-06-25 | Cryogenic globe valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362976.9U CN203927041U (en) | 2014-06-25 | 2014-06-25 | Cryogenic globe valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203927041U true CN203927041U (en) | 2014-11-05 |
Family
ID=51822852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420362976.9U Active CN203927041U (en) | 2014-06-25 | 2014-06-25 | Cryogenic globe valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203927041U (en) |
-
2014
- 2014-06-25 CN CN201420362976.9U patent/CN203927041U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |