CN209604556U - A kind of automatic compensation fire prevention cryogenic globe valve - Google Patents
A kind of automatic compensation fire prevention cryogenic globe valve Download PDFInfo
- Publication number
- CN209604556U CN209604556U CN201920225286.1U CN201920225286U CN209604556U CN 209604556 U CN209604556 U CN 209604556U CN 201920225286 U CN201920225286 U CN 201920225286U CN 209604556 U CN209604556 U CN 209604556U
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- China
- Prior art keywords
- valve
- flap
- fire prevention
- automatic compensation
- soft seal
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Abstract
A kind of automatic compensation fire prevention cryogenic globe valve, including valve body, flap, valve rod and valve deck；The flap bottom end is equipped with soft seal, and soft seal is fixed by plain cushion, bolt and nut component；Flap upper end is fixed with flap and cap, and simultaneously valve rod end is limited in flap flap by cap；Spring is equipped in the flap, soft seal is close on the sealing surface of valve body by spring.A kind of automatic compensation fire prevention cryogenic globe valve provided by the utility model, can prevent from causing soft seal to be failed because of agent burns.
Description
Technical field
The utility model relates to shut-off valve, especially a kind of automatic compensation fire prevention cryogenic globe valve.
Background technique
Shut-off valve is also known as pipe valve valve, belongs to forced seal formula valve, so when valve is closed, it is necessary to apply to spool and press
Power is not leaked with forced seal face.
The sealing structure of shut-off valve divides soft seal and hard sealing two major classes, switch cutoff valve is belonged to, as in pipeline
It opens and closes element and is widely used.And the soft seal shut-off valve that sealing performance is excellent, it burns, can be led suddenly once encountering medium
Cause nonmetallic soft seal to meet high temperature to melt rapidly, generate gap so that sealing is entirely ineffective, valve can not normal cutoff, from
And cause accident, it can bring about great losses to environment and lives and properties when serious.And metal hard-sealing shut-off valve is due to it
Sealing performance does not have nonmetallic sealed stop valve reliable, has a small amount of dielectric leakage, some operating conditions be do not allow using, only
The shut-off valve of soft sealing structure can be used, but encountering special circumstances can cause soft seal to be burnt, valve can not cut off medium.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of automatic compensation fire prevention cryogenic globe valves, can be realized
Soft seal and hard sealing combine, and guarantee that valve being capable of normal use.
In order to solve the above technical problems, the technical scheme adopted by the utility model is:
A kind of automatic compensation fire prevention cryogenic globe valve, including valve body, flap, valve rod and valve deck；
The flap bottom end is equipped with soft seal, and soft seal is fixed by plain cushion, bolt and nut component；Flap upper end is fixed with
Valve rod end is limited in flap by flap and cap, flap and cap；Spring is equipped in the flap, soft seal is close to by spring
On the sealing surface of valve body.
Inside and outside airtight and watertight padding, filler washer, filler pressing and filler pressing of the valve rod across valve deck and in sealed letter
It is connect after the O-ring seal of each setting of circle, gland with actuator.
It is fixed between the valve deck Basolateral and valve body by studs, nut, and sealing ring is compressed and is sealed；Valve deck
Bottom end inner ring passes through upper seal support and valve stem seal.
Valve seat is welded with hard alloy sealing surface in the middle part of the valve body；Hard alloy sealing surface is welded on flap.
A kind of automatic compensation fire prevention cryogenic globe valve of the utility model, is compared, In with conventional metal hard-sealing shut-off valve
Nonmetallic soft seal is increased between flap and valve body contact face, blending bolt gasket is fixed.Simultaneously inside the lumen of flap
Spring is added in plane, with valve rod baseplane close to contacting, the other end is placed in flap lumen spring one end.Valve is opened
When, by upper seal support can prevent medium by valve rod to stuffing-box permeate, valve close when, by handwheel or its
His driving method, so that flap and valve body patch are dead, centre forms firm soft sealing structure.In use, once encountering
Because friction impact leads to ignition, the sealing ring of soft seal at this time can melt immediately medium because high temperature is met, valve body and
It will appear gap between flap, at this point, being in the spring of compressive state, upper end is tightly close to valve rod bottom end, and lower end can be at once
Flap is pushed to move down, so that a metal hard-sealing is quickly formed between valve body and flap, to guarantee valve normal use.
Wherein, it is only necessary to guarantee to release stress moment in spring, guarantee to push flap with enough power, so that itself and valve body
Compression.
Compared to conventional shut-off valve, which compensates for many script metal hard-sealings and cuts
The only deficiency of valve reduces various uncertain bring hidden danger.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the cross-sectional view (hatching of valve rod and valve deck is not drawn into) of the utility model.
Fig. 2 is the partial enlargement diagram in Fig. 1 at A.
Fig. 3 is the schematic diagram on device top in Fig. 1.
In figure: valve body 1, flap 2, flap and cap 3, valve rod 4, studs 5, plain cushion 6, gasket 7, spring 8, sealing is filled out
Material 9, pin shaft 10, split pin 11, filler pressing 12, the first hex nut 13, eyelet bolt 14, valve deck 15, T-nut 16, only
Dynamic screw 17, handwheel 18, plain washer 19, the second hex nut 20, gland 21, O-ring seal 22, filler washer 23 are soft
Sealing 24, bolt and nut component 25, upper seal support 26.
Specific embodiment
As shown in Figure 1-3, a kind of automatic compensation fire prevention cryogenic globe valve, including valve body 1,1 top of valve body pass through double end spiral shell
Column 5, nut and valve deck 15 are fixed, and gasket 7 is additionally provided between valve body 1 and valve deck 15, by gasket 7 guarantee valve body 1 with
15 outer side seal of valve deck avoids liquid medium from overflowing from valve deck 15.
It is equipped with the middle part valve seat with opening in the valve body 1, the opening face of middle part valve seat has flap 2, flap 2 and valve
Nonmetallic soft seal 24 is increased between 1 contact surface of body, and fixed with plain cushion 6, bolt and nut component 25.2 top of flap
It is welded with flap and cap 3, simultaneously 3 end portion of cap is extend into the lumen of flap 2 flap.In addition it is also set in the lumen of flap 2
There are multiple mounting grooves, be equipped with spring 8 in mounting groove, 8 other end of spring and the baseplane of the end of 4 bottom end of valve rod are close to contacting.
The tip diameter of valve rod 4 is greater than the diameter of 4 main part of valve rod, and the end of valve rod 4 is located in the lumen of flap 2 and by flap simultaneously
The limit of cap 3.4 main part of valve rod is stretched out flap and cap 3, valve deck 15, the T-nut 16 on 15 top of valve deck and is connected with handwheel 18
It connects.When rotation hand wheel 18, valve rod 4 is mobile relative to T-nut 16, to drive flap 2 mobile.When flap 2 moves down
When, flap 2 carries out the cut-off of valve by soft seal 24, and when flap 2 moves up, valve is opened.
The stem lower portion and 15 inner ring of valve deck are arranged upper seal support 26, upper seal support 26 can prevent medium by valve rod to
Stuffing-box infiltration.In addition between 15 inner ring of valve rod top and valve deck be arranged airtight and watertight padding 9, filler washer 23, filler pressing 12,
Filler pressing inside and outside circle is respectively provided with O-ring seal 22 and gland 21.It can avoid liquid by upper and lower two parts sealing structure to be situated between
Matter is overflowed from valve rod to overflow from 15 top of valve deck.
In addition, part opposite on middle part valve seat, flap 2 is welded with hard alloy sealing surface, so as to form metallic hard
Sealing structure prevents kindling bring harm once that after soft seal kindling failure, can form hard sealing at once.
Under normal circumstances, it is PCTFE by nonmetallic soft seal 24(soft seal material) sealed valve, once liquid medium
Temperature is excessively high, or kindling exception occurs, so that failure is melted in soft seal 24.At this point, by the spring 8 being mounted in flap 2, it is fast
Quick-release, which is bled off pressure, to be pushed dynamic flap 2 and moves down so that be close on the sealing surface of 1 middle part valve seat of valve body, is quickly formed hard close
Seal structure prevents the generation of accident in time.Structure production and processing is simple, low in cost, strong operability.
Claims (4)
1. a kind of automatic compensation fire prevention cryogenic globe valve, it is characterised in that: including valve body (1), flap (2), valve rod (4) and valve deck
(15)；
Flap (2) bottom end is equipped with soft seal (24), and soft seal (24) is fixed by plain cushion (6), bolt and nut component (25)；
Flap (2) upper end is fixed with flap and cap (3), and simultaneously valve rod (4) end is limited in flap (2) flap by cap (3)；The flap
(2) spring (8) are equipped in, soft seal (24) is close on the sealing surface of valve body (1) by spring (8).
2. a kind of automatic compensation fire prevention cryogenic globe valve according to claim 1, it is characterised in that: the valve rod (4) is worn
It is each to cross airtight and watertight padding (9) in valve deck (15) and sealed letter, filler washer (23), filler pressing (12) and filler pressing inside and outside circle
The O-ring seal (22) of setting, gland (21) are connect with actuator afterwards.
3. a kind of automatic compensation fire prevention cryogenic globe valve according to claim 1, it is characterised in that: valve deck (15) bottom
It is fixed between end outside and valve body (1) by studs, nut, and sealing ring (7) is compressed and are sealed；Valve deck (15) bottom end inner ring
It is sealed by upper seal support (26) and valve rod (4).
4. a kind of automatic compensation fire prevention cryogenic globe valve according to claim 1, it is characterised in that: in the valve body (1)
Portion's valve seat is welded with hard alloy sealing surface；Hard alloy sealing surface is welded on flap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920225286.1U CN209604556U (en) | 2019-02-22 | 2019-02-22 | A kind of automatic compensation fire prevention cryogenic globe valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920225286.1U CN209604556U (en) | 2019-02-22 | 2019-02-22 | A kind of automatic compensation fire prevention cryogenic globe valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209604556U true CN209604556U (en) | 2019-11-08 |
Family
ID=68404216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920225286.1U Active CN209604556U (en) | 2019-02-22 | 2019-02-22 | A kind of automatic compensation fire prevention cryogenic globe valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209604556U (en) |
-
2019
- 2019-02-22 CN CN201920225286.1U patent/CN209604556U/en active Active
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