CN103775656A - Low-temperature high-pressure stop valve - Google Patents
Low-temperature high-pressure stop valve Download PDFInfo
- Publication number
- CN103775656A CN103775656A CN201410025300.5A CN201410025300A CN103775656A CN 103775656 A CN103775656 A CN 103775656A CN 201410025300 A CN201410025300 A CN 201410025300A CN 103775656 A CN103775656 A CN 103775656A
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- China
- Prior art keywords
- valve
- sealing
- flap
- tapering
- pressure stop
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- Pending
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a low-temperature high-pressure stop valve, which comprises a valve body, a valve bonnet, a valve clack and a valve stem, wherein an inlet passage, an outlet passage and a valve clack installing chamber which is connected with the inlet passage and the outlet passage are formed in the valve body, the valve bonnet is fixedly arranged on the valve body and a sealing ring is arranged between the valve bonnet and the valve body. The low-temperature high-pressure stop valve is characterized in that a threaded sleeve is fixedly arranged on the valve bonnet, the valve clack is movably installed in the valve clack installing chamber, the valve stem is in threaded connection with the threaded sleeve and the lower end of the valve stem is fixedly connected with the valve clack; a sealing cone part which is used for cutting off the inlet passage and the outlet passage is arranged at the lower end of the valve clack, and the sealing cone part is in seal fit with the bottom of the valve clack installing chamber; a back sealing cone part is arranged on the valve steam and the back sealing cone part is in seal fit with the valve bonnet when the valve clack is fully opened. The low-temperature high-pressure stop valve has the advantages that since the back sealing cone part on the valve stem is also used for realizing the sealing between the valve stem and the valve bonnet in addition to using the sealing ring for sealing, the sealing performance of the low-temperature high-pressure stop valve is guaranteed and the medium leakage probability is reduced.
Description
Technical field
The present invention relates to a kind of cryogenic high pressure stop valve.
Background technique
Cryogenic high pressure stop valve is generally applied in the pressure duct of cryogenic media, for example cryogenic high pressure stop valve is applied in the cryogenic high pressure pipeline of L-CNG gas station, can play the effect of effective connection and cut-out to cryogenic high pressure medium, can improve the effect of upper sealing, prevent the generation leaking outside simultaneously.Common high-pressure stop valve comprises valve body in the market, valve gap, flap and valve rod, on described valve body, be provided with inlet channel, the flap installation cavity of outlet passage and connection inlet channel and outlet passage, described valve gap be fixed on valve body and and valve body between be provided with seal ring, flap is installed in flap installation cavity and is fixedly connected with valve rod, the following problem of stop valve ubiquity of right this structure: the sealing between valve gap and the valve body of current cryogenic high pressure stop valve generally adopts the compound sealing structure of tetrafluoro filler and O shape rubber seal, but be difficult to guarantee more than 0 ℃ because of filler position in actual use, the very large impact that is even subject to cryogenic media makes tetrafluoro filler and O shape rubber seal lose the elasticity and the sealability that had at normal temperatures, being prone to medium reveals.And for LNG, occur that medium leaks outside to be easy to cause fiery explosive accident.
Summary of the invention
Technical problem to be solved by this invention is: a kind of cryogenic high pressure stop valve is provided, this cryogenic high pressure stop valve in the time opening completely except utilizing seal ring sealing, also utilize between the back of the body on valve rod sealing tapering and valve gap and seal, thereby guarantee the sealability of cryogenic high pressure stop valve, reduce the probability that medium leaks outside.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of cryogenic high pressure stop valve, comprise valve body, valve gap, flap and valve rod, on described valve body, be provided with inlet channel, outlet passage and connect the flap installation cavity of inlet channel and outlet passage, described valve gap be fixed on valve body and and valve body between be provided with seal ring, on described valve gap, be fixed with swivel nut, described flap is movably installed in flap installation cavity, described valve rod is threaded with swivel nut, and the lower end of this valve rod is fixedly connected with flap; The lower end of described flap is provided with the sealing tapering that cuts off inlet channel and outlet passage, and sealing tapering coordinates with the sealed bottom of flap installation cavity; On described valve rod, be provided with back of the body sealing tapering, this back of the body sealing tapering coordinates with valve bonnet seal in the time that flap is opened completely.
As the preferred scheme of one, the surface in described sealing tapering is provided with wear-resistant alloy layer, and this wear-resistant alloy layer covers the conical surface in whole sealing tapering.
As the preferred scheme of one, the conical surface middle part in described back of the body sealing tapering is provided with wear-resistant alloy layer.
As the preferred scheme of one, described valve gap is arranged to inclined-plane with the sealing surface that back of the body sealing tapering coordinates, and the angle of inclination on this inclined-plane is consistent with the conical surface in sealed tapering.
Adopt after technique scheme, effect of the present invention is: this cryogenic high pressure stop valve, between valve gap and valve body, arrange seal ring sealing, on valve rod, be also provided with back of the body sealing tapering, in the time that stop valve is opened, rotary valve rod, thereby valve rod upwards moves drive, flap moves upward, the its corresponding fitting surface in sealing tapering on flap separates, and inlet channel is communicated with by flap installation cavity with outlet passage; And in the time being opened to maximum, back of the body sealing tapering and the valve gap of valve rod contact, cryogenic high pressure stop valve has the function of double seal in the time opening like this, and the sealing effect while guaranteeing to open reduces the probability that medium is revealed.
Again because the surface in described sealing tapering is provided with wear-resistant alloy layer, this wear-resistant alloy layer covers the conical surface in whole sealing tapering, the setting of wear-resistant alloy layer can increase the working life in sealing tapering, and wear-resistant alloy layer covers the conical surface in whole sealing tapering, expand the effective sealing position in sealing tapering.
Because the conical surface middle part in described back of the body sealing tapering is provided with wear-resistant alloy layer, in like manner can improve the wear resistance in back of the body sealing tapering again.
Again due to as the preferred scheme of one, described valve gap is arranged to inclined-plane with the sealing surface that back of the body sealing tapering coordinates, and the angle of inclination on this inclined-plane is consistent with the conical surface in sealed tapering, therefore, can effectively improve the tightness that coordinates in valve bonnet seal face and sealed tapering, improve sealing effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structure sectional view of the embodiment of the present invention;
Fig. 2 is the enlarged diagram of Fig. 1 at I place;
In accompanying drawing: 1. valve body; 11. outlet passages; 12. inlet channeles; 13. flap installation cavitys; 2. flap; 21. sealing taperings; 22. wear-resistant alloy layers; 3. seal ring; 4. valve gap; 41. sealing surfaces; 5. valve rod 5; 51. back of the body sealing taperings; 52. wear-resistant alloy layers; 6. bolt; 7. swivel nut.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
As shown in Figure 1, 2, a kind of cryogenic high pressure stop valve, comprise valve body 1, valve gap 4, flap 2 and valve rod 5, on described valve body 1, be provided with inlet channel 12, outlet passage 11 and connect flap 2 installation cavitys 13 of inlet channel 12 and outlet passage 11, this inlet channel 12 is tilted to vertical flap 2 installation cavitys 13 and is communicated with, flap 2 can be vertical in flap 2 installation cavitys 13 motion, this place is described is vertically with residing location expression in Fig. 1; This outlet passage 11 is horizontally disposed with; Described valve gap 4 be fixed on valve body 1 and and valve body 1 between be provided with seal ring 3, fixing by bolt 6 between this valve gap 4 and valve body 1, on described valve gap 4, be fixed with swivel nut 7, this swivel nut 7 is provided with internal thread and outside thread, outside thread is threaded with valve gap 4, described flap 2 is movably installed in flap 2 installation cavitys 13, and described valve rod 5 is connected with the internal thread of swivel nut 7, and the lower end of this valve rod 5 is fixedly connected with flap 2; The lower end of described flap 2 is provided with the sealing tapering 21 that cuts off inlet channel 12 and outlet passage 11, and sealing tapering 21 coordinates with the sealed bottom of flap 2 installation cavitys 13; On described valve rod 5, be provided with back of the body sealing tapering 51, this back of the body sealing tapering 51 in the time that flap 2 is opened completely and valve gap 4 be sealed and matched.The surface in described sealing tapering 21 is provided with wear-resistant alloy layer 22, and this wear-resistant alloy layer 22 covers the conical surface in whole sealing tapering 21.The conical surface middle part in described back of the body sealing tapering 51 is provided with wear-resistant alloy layer 52.Described valve gap 4 is arranged to inclined-plane with the sealing surface 41 that back of the body sealing tapering 51 coordinates, and the angle of inclination on this inclined-plane is consistent with the conical surface in sealed tapering 21.Above-mentioned wear- resistant alloy layer 52,22 all adopts conventional abrasion resistance alloy at present.
Claims (4)
1. a cryogenic high pressure stop valve, comprise valve body, valve gap, flap and valve rod, on described valve body, be provided with inlet channel, outlet passage and connect the flap installation cavity of inlet channel and outlet passage, described valve gap be fixed on valve body and and valve body between be provided with seal ring, it is characterized in that: on described valve gap, be fixed with swivel nut, described flap is movably installed in flap installation cavity, and described valve rod is threaded with swivel nut, and the lower end of this valve rod is fixedly connected with flap; The lower end of described flap is provided with the sealing tapering that cuts off inlet channel and outlet passage, and sealing tapering coordinates with the sealed bottom of flap installation cavity; On described valve rod, be provided with back of the body sealing tapering, this back of the body sealing tapering coordinates with valve bonnet seal in the time that flap is opened completely.
2. a kind of cryogenic high pressure stop valve as claimed in claim 1, is characterized in that: the surface in described sealing tapering is provided with wear-resistant alloy layer, and this wear-resistant alloy layer covers the conical surface in whole sealing tapering.
3. a kind of cryogenic high pressure stop valve as claimed in claim 2, is characterized in that: the conical surface middle part in described back of the body sealing tapering is provided with wear-resistant alloy layer.
4. a kind of cryogenic high pressure stop valve as claimed in claim 3, is characterized in that: described valve gap is arranged to inclined-plane with the sealing surface that back of the body sealing tapering coordinates, and the angle of inclination on this inclined-plane is consistent with the conical surface in sealed tapering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025300.5A CN103775656A (en) | 2014-01-21 | 2014-01-21 | Low-temperature high-pressure stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025300.5A CN103775656A (en) | 2014-01-21 | 2014-01-21 | Low-temperature high-pressure stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103775656A true CN103775656A (en) | 2014-05-07 |
Family
ID=50568234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410025300.5A Pending CN103775656A (en) | 2014-01-21 | 2014-01-21 | Low-temperature high-pressure stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103775656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373610A (en) * | 2014-10-31 | 2015-02-25 | 成都欣国立低温科技有限公司 | Stop valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064843U (en) * | 1990-01-12 | 1990-10-31 | 周明善 | Double-closing stop valve |
| CN2477900Y (en) * | 2000-12-02 | 2002-02-20 | 刘国清 | Full metal sealing valve |
| CN202182190U (en) * | 2011-07-21 | 2012-04-04 | 江苏阜阀阀业机械有限公司 | High-temperature and high-pressure stop valve |
| CN202790571U (en) * | 2012-09-27 | 2013-03-13 | 四川优机实业股份有限公司 | Low temperature stop valve |
| CN203717950U (en) * | 2014-01-21 | 2014-07-16 | 张家港富瑞特种装备股份有限公司 | Low-temperature high-pressure stop valve |
-
2014
- 2014-01-21 CN CN201410025300.5A patent/CN103775656A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064843U (en) * | 1990-01-12 | 1990-10-31 | 周明善 | Double-closing stop valve |
| CN2477900Y (en) * | 2000-12-02 | 2002-02-20 | 刘国清 | Full metal sealing valve |
| CN202182190U (en) * | 2011-07-21 | 2012-04-04 | 江苏阜阀阀业机械有限公司 | High-temperature and high-pressure stop valve |
| CN202790571U (en) * | 2012-09-27 | 2013-03-13 | 四川优机实业股份有限公司 | Low temperature stop valve |
| CN203717950U (en) * | 2014-01-21 | 2014-07-16 | 张家港富瑞特种装备股份有限公司 | Low-temperature high-pressure stop valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373610A (en) * | 2014-10-31 | 2015-02-25 | 成都欣国立低温科技有限公司 | Stop valve |
| CN104373610B (en) * | 2014-10-31 | 2017-09-19 | 成都欣国立低温科技有限公司 | A kind of stop valve |
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Application publication date: 20140507 |