CN112253760A - Manual switch ultra-low temperature stop valve - Google Patents
Manual switch ultra-low temperature stop valve Download PDFInfo
- Publication number
- CN112253760A CN112253760A CN202011191340.9A CN202011191340A CN112253760A CN 112253760 A CN112253760 A CN 112253760A CN 202011191340 A CN202011191340 A CN 202011191340A CN 112253760 A CN112253760 A CN 112253760A
- Authority
- CN
- China
- Prior art keywords
- valve
- low temperature
- disc
- packing
- cover
- 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.)
- Pending
Links
- 238000012856 packing Methods 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000003949 liquefied natural gas Substances 0.000 abstract description 12
- 239000002131 composite material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
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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
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/482—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member
- F16K1/485—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member with a groove in the spindle
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
-
- 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a manual switch ultralow temperature stop valve, which comprises: the valve body is provided with two cavities which are communicated with each other; the valve disc is arranged at the communication position of the two cavities of the valve body, and a sealing surface is formed between the valve disc and the valve body; the valve cover is arranged on the valve body; one end of the valve rod is connected with the valve disc, and the other end of the valve rod extends to be arranged outside the valve cover; and the packing sealing assembly is arranged at the upper end of the valve cover. The invention can meet the operating condition of the liquefied natural gas carrier at extremely low temperature.
Description
Technical Field
The invention particularly relates to an ultralow temperature stop valve with a manual switch.
Background
With the development of shipbuilding industry, more and more valves are widely applied to ship piping and play a very important role in the whole ship system. The Liquefied Natural Gas (LNG) ship is a special ship designed and built for transporting liquefied natural gas at an extremely low temperature of-163 ℃, and among all the current freight ships, the LNG ship is the most technically complex and difficult, and is called as the pearl on the crown of the world shipbuilding. The marine manual ultralow temperature stainless steel stop valve of LNG can be under 196 degrees below zero work environment, and the stop valve of normal work has very high practical value and development prospect.
LNG boats and ships pipe-line system is very complicated and important, and traditional valve can't work under the ultra-low temperature state, can warp even because the material reason appears, cracked condition, and ordinary low temperature valve also can appear metal deformation, sealed face deformation under the environment of ultra-low temperature, sealed condition of effecting effectively. The manual ultralow-temperature stainless steel stop valve for the LNG ship can work in an environment of 196 ℃ below zero, is widely applicable to various complicated LNG ship pipelines, is made of austenitic stainless steel materials, has high low-temperature toughness, overcomes the defect of cold brittleness of the materials in an ultralow-temperature environment, can effectively reduce impact of various stresses in the low-temperature environment due to structural design, and has excellent product performance.
Disclosure of Invention
The invention aims to provide a manual on-off ultralow temperature stop valve, which meets the operating condition of an liquefied natural gas carrier at extremely low temperature.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a manual switch ultra-low temperature stop valve which characterized in that includes:
the valve body is provided with two cavities which are communicated with each other;
the valve disc is arranged at the communication position of the two cavities of the valve body, and a sealing surface is formed between the valve disc and the valve body;
the valve cover is arranged on the valve body;
one end of the valve rod is connected with the valve disc, and the other end of the valve rod extends to be arranged outside the valve cover;
and the packing sealing assembly is arranged at the upper end of the valve cover.
The stuffing seal assembly comprises:
the filler pad is used for placing fillers;
the packing pressing sleeve is arranged at the upper end of the packing and is arranged between the valve cover and the valve rod;
the compression nut is pressed and connected to the top end of the valve cover in a pressing mode;
and the disc spring is arranged between the compression nut and the packing pressing sleeve.
The valve also comprises a plurality of small steel balls, the small steel balls are arranged in the groove between the valve rod and the valve disc, and a steel wire locking ring is arranged in the groove outside the valve disc.
And O-shaped rings are respectively arranged between the packing pressing sleeve and the valve cover and between the packing pressing sleeve and the valve rod.
A gasket is arranged between the valve cover and the valve body.
The handle is connected to the other end of the valve rod.
The filler is made of metal graphite woven material.
Compared with the prior art, the invention has the following advantages:
the high-temperature-resistant composite pipe can be applied to various complex pipe systems, can be well used under the working condition of the liquefied natural gas carrier at the ultralow temperature of-163 ℃, and has extremely wide application.
Drawings
Fig. 1 is a schematic structural view of an ultralow temperature stop valve which is opened and closed manually according to the present invention.
Detailed Description
The present invention will now be further described by way of the following detailed description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings.
As shown in fig. 1, a manually opening and closing ultra-low temperature stop valve includes: the valve body 1 is provided with two cavities which are communicated with each other; the valve disc 2 is correspondingly arranged at the communication position of the two cavities of the valve body, a sealing surface is formed between the valve disc and the valve body, the sealing surface is a conical surface, the conical surface sealing has higher cost performance than other types of sealing, and the sealing can be automatically supplemented by the conical surface even if the sealing is slightly worn; the valve cover 4 is arranged on the valve body 1; one end of the valve rod 5 is connected with the valve disc 4, and the other end of the valve rod 5 extends outside the valve cover 4; and the packing sealing assembly is arranged at the upper end of the valve cover 4, and a threaded sleeve 13 is arranged between the lower end of the valve cover 4 and the valve rod 5.
In a particular embodiment, the stuffing seal assembly comprises: a filler pad 6 for placing a filler 7; the packing pressing sleeve 8 is arranged at the upper end of the packing 7 and is arranged between the valve cover 4 and the valve rod 5; a compression nut 10 crimped to the top end of the bonnet 4; and the disc spring is arranged between the compression nut 10 and the packing pressing sleeve 8. Further, the compression nut 10 is locked by a hexagonal lock nut 9. The packing 7 is made of a metal graphite woven material, the packing 7 and the packing pressing sleeve 8 are matched through arc end faces, uniform stress of the packing pressing sleeve and uniform stress of the packing can be fully guaranteed, sealing performance is guaranteed, the disc spring is used for compensating shrinkage after extrusion deformation of the packing 7, the packing 7 is fully compressed, and sealing performance of the packing 7 is fully guaranteed.
In addition, the valve cover 4 is strictly designed according to the standard requirements of the valve, so that the temperature of the flange on the valve cover 4 is controlled to be above 0 ℃ through the heat conduction effect in the using process, and the use safety and the sealing performance of the upper filler are ensured.
Further, the manual switch ultralow temperature stop valve further comprises a plurality of small steel balls 16, the small steel balls 16 are arranged in the groove between the valve rod 5 and the valve disc 4, and a steel wire locking ring 17 is arranged in the groove outside the valve disc, so that the small steel balls 16 are prevented from rolling out, and the valve rod and the valve disc move up and down together.
The packing press sleeve 8 and the valve cover 2 and the packing press sleeve 8 and the valve rod 5 are respectively provided with O-shaped rings, in the embodiment, two O-shaped ring grooves are arranged on the outer side of the packing press sleeve, one O-shaped ring groove is arranged on the inner side of the packing press sleeve, one O-shaped ring is respectively arranged in each of the three O-shaped ring grooves, the sealing performance is fully guaranteed, and the external leakage of the stop valve is avoided.
A gasket 3 is arranged between the valve cover 4 and the valve body 1, the gasket 3 is a metal corrugated tooth composite gasket, namely, the gasket is formed by bonding flexible graphite or polytetrafluoroethylene and other non-asbestos non-metallic materials on the lower surface of a special corrugated metal frame, and the composite gasket has better resilience compensation performance and lower pre-tightening load.
In the specific embodiment, the stop valve further comprises a handle 11, the other end of the valve rod is provided with a square tenon and a thread, the square tenon and the thread are connected with a hand wheel through a nut 12, and the handle 11 is rotated to drive the valve rod 5 to lift, so that the valve disc 2 is controlled to lift, and the stop valve is controlled to be opened and closed.
In conclusion, the ultralow temperature stop valve capable of being opened and closed manually can be applied to various complex piping systems, can be well used under the working condition of the liquefied natural gas carrier at the ultralow temperature of-163 ℃, and has extremely wide application.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (7)
1. The utility model provides a manual switch ultra-low temperature stop valve which characterized in that includes:
the valve body is provided with two cavities which are communicated with each other;
the valve disc is arranged at the communication position of the two cavities of the valve body, and a sealing surface is formed between the valve disc and the valve body and is a conical surface;
the valve cover is arranged on the valve body;
one end of the valve rod is connected with the valve disc, and the other end of the valve rod extends to be arranged outside the valve cover; and the packing sealing assembly is arranged at the upper end of the valve cover.
2. The manually switchable ultra-low temperature shut-off valve of claim 1, wherein said stuffing seal assembly comprises:
the filler pad is used for placing fillers;
the packing pressing sleeve is arranged at the upper end of the packing and is arranged between the valve cover and the valve rod;
the compression nut is pressed and connected to the top end of the valve cover in a pressing mode;
and the disc spring is arranged between the compression nut and the packing pressing sleeve.
3. The manual switch ultra-low temperature stop valve of claim 1, further comprising a plurality of small steel balls, wherein the small steel balls are arranged in a groove between the valve rod and the valve disc, and a steel wire locking ring is arranged in the groove outside the valve disc.
4. The manual switch ultra-low temperature stop valve as claimed in claim 1, wherein O-rings are respectively arranged between the packing pressing sleeve and the valve cover and between the packing pressing sleeve and the valve rod.
5. The manually-operated ultralow temperature stop valve as set forth in claim 1, wherein a gasket is disposed between said valve cover and said valve body.
6. The manually opened and closed ultra-low temperature stop valve as claimed in any one of claims 1 to 5, further comprising a handle connected to the other end of the valve stem.
7. The manually-operated ultralow temperature stop valve as set forth in claim 2, wherein said filler is made of a metal graphite braided material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011191340.9A CN112253760A (en) | 2020-10-30 | 2020-10-30 | Manual switch ultra-low temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011191340.9A CN112253760A (en) | 2020-10-30 | 2020-10-30 | Manual switch ultra-low temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253760A true CN112253760A (en) | 2021-01-22 |
Family
ID=74268327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011191340.9A Pending CN112253760A (en) | 2020-10-30 | 2020-10-30 | Manual switch ultra-low temperature stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112253760A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392952Y (en) * | 1999-09-08 | 2000-08-23 | 伍万里 | Super-low liquid stop valve |
| JP2008019883A (en) * | 2006-07-10 | 2008-01-31 | Toho Gas Co Ltd | Small-diameter stop valve for extremely low temperature |
| CN205479583U (en) * | 2015-12-24 | 2016-08-17 | 安科特种阀门有限公司 | In -band leaks super low temperature check valve of function |
| CN208381335U (en) * | 2018-05-28 | 2019-01-15 | 张家港富瑞阀门有限公司 | A kind of Novel ultralow-temperature shut-off valve |
| CN211315164U (en) * | 2019-12-05 | 2020-08-21 | 四川良川机械设备有限公司 | Sealing pair structure of stop valve |
-
2020
- 2020-10-30 CN CN202011191340.9A patent/CN112253760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392952Y (en) * | 1999-09-08 | 2000-08-23 | 伍万里 | Super-low liquid stop valve |
| JP2008019883A (en) * | 2006-07-10 | 2008-01-31 | Toho Gas Co Ltd | Small-diameter stop valve for extremely low temperature |
| CN205479583U (en) * | 2015-12-24 | 2016-08-17 | 安科特种阀门有限公司 | In -band leaks super low temperature check valve of function |
| CN208381335U (en) * | 2018-05-28 | 2019-01-15 | 张家港富瑞阀门有限公司 | A kind of Novel ultralow-temperature shut-off valve |
| CN211315164U (en) * | 2019-12-05 | 2020-08-21 | 四川良川机械设备有限公司 | Sealing pair structure of stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210122 |