CN203717954U - Low-temperature stop valve - Google Patents
Low-temperature stop valve Download PDFInfo
- Publication number
- CN203717954U CN203717954U CN201420125753.0U CN201420125753U CN203717954U CN 203717954 U CN203717954 U CN 203717954U CN 201420125753 U CN201420125753 U CN 201420125753U CN 203717954 U CN203717954 U CN 203717954U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- rod
- base
- cutting
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lift Valve (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a low-temperature stop valve which comprises a hand wheel (1), a valve rod (11), a press cap (2), a valve body (4) and a valve seat (6). A shaft shoulder (3) is arranged in the middle of the valve rod (11), the upper end of the valve seat (6) is connected with the lower end of the valve rod (11) and also in thread connection with the press cap (2), and the lower end of the valve seat (6) is arranged between an air inlet (5) and an air outlet (8) and forms a valve with the valve body (4) through a sealing part. A boss is arranged at the upper end, facing the upper shaft shoulder (3) of the valve rod (11), of the valve seat (6), and at least one radial carved groove is formed on an end face of the boss (9). By means of the structure that the boss at the upper end of the valve seat is in tight contact with a step face of the shaft shoulder in the middle of the valve rod and the contact face is communicated with the outside through the carved groove, the sealing occlusion phenomenon of the contact face is avoided. Thus, the hand wheel is flexible and smooth to operate.
Description
Technical field
The utility model relates to the technical field of valve, is specifically a kind of cryogenic globe valve for the crucial control unit on cryogenic insulated cylinder, cryogenic liquid storage tank pipeline.
Background technique
Cryogenic globe valve is the critical valves of controlling on cryogenic insulated cylinder, cryogenic liquid storage tank pipeline.The cryogenic globe valve of prior art, as shown in Figure 1, it comprises handwheel 01, pressure cap 02, valve rod 05, valve assembly 07 and valve body 03, in valve body 03, there is suction port 04 and the air outlet 08 of connection, handwheel 01 is connected to the upper end of valve rod 05, pressure cap 02 is positioned at the below of handwheel 01 and is tightly connected by seal ring and valve rod 05, the lower end of pressure cap 02 is connected on valve body 03, the upper end outer wall thread of valve assembly 07 is connected to the inside, lower end of pressure cap 02, the upper end of valve assembly 07 is inner circumferentially spacing and be slidably connected with valve rod 05, between the lower end of valve rod 05 and valve assembly 07, form the air chamber 06 of sealing, the bottom of valve assembly 07 and valve body 03 form the valve between suction port 04 and air outlet 08.
The working principle of above-mentioned cryogenic globe valve is as follows: when work, by counterclockwise reversing handwheel 01, valve is reached to maximum, and (this is to be the gas of liquefaction due to what flow in low temperature valve, as liquid oxygen, liquid argon, liquid nitrogen and LNG Liquefied natural gas etc., its minimum temperature can reach-196 DEG C, therefore, the latus rectum of valve is larger comparatively speaking), make cryogenic liquid gas from the suction port 04 of valve through flow direction valve air outlet 08.
But there is following shortcoming in the cryogenic globe valve of above-mentioned this structure:
1) due in the time that valve opening is extremely maximum, the step surface close contact of the shaft shoulder in the middle of valve assembly upper end and valve rod, and valve body in valve assembly is to be made up of identical material with valve rod, therefore, be easy to occur the phenomenon of sealing interlock, thereby make operated by handwheel jam; Meanwhile, in the situation of opening and closing valve, can make the surface of contact of valve body and the valve rod shaft shoulder occur scratch continually;
2) when after valve opening, the step surface close contact of valve body upper end and the valve rod shaft shoulder, if long-time gas does not circulate or air outlet outside valve closing, easily cause the temperature rise under natural state of stop valve top, therefore cause that the gas expansion pressure in sealed air chamber 06 increases, thereby occur unsafe factor.
Model utility content
Technical problem to be solved in the utility model is, a kind of handwheel jam, safe and reliable cryogenic globe valve still can avoided the in the situation that of frequent switch valve is provided.
For solving the problems of the technologies described above, the cryogenic globe valve that the utility model provides, comprise handwheel, valve rod, pressure cap, valve body and valve base, in valve body, there is suction port and the air outlet of connection, handwheel is connected to the upper end of valve rod, valve rod middle part is rotationally connected with pressure cap, the lower end of pressure cap is connected with valve body, the middle part of valve rod has the shaft shoulder, the upper end of valve base is connected to the lower end of valve rod and is threaded with pressure cap simultaneously, and the lower end of valve base forms valve between suction port and air outlet and by Sealing and valve body; Described valve base has boss in the upper end of the shaft shoulder on valve rod, has at least one cutting radially on the end face of boss.
The quantity of described cutting is four, along the circumferential direction uniform.
The cross section of described cutting is V-arrangement, and the groove depth of the cutting of this V-arrangement is 0.3mm, and the angle that the cell wall of the cutting of V-arrangement forms is 60 °.
The cross section of described valve rod lower end and the joint of valve base is square, and the matching hole of corresponding valve base is square opening, and the square opening of valve rod lower end and valve base is slidably matched, and forms air chamber between at the bottom of the bottom of valve rod and the hole of square opening.
Adopt after above structure, the utility model compared with prior art, has the following advantages:
1) due in the time that valve opening is extremely maximum, when the step surface close contact of the shaft shoulder in the middle of the boss of valve base upper end and valve rod, between surface of contact, communicate with the external world by cutting, therefore, there will not be the phenomenon of surface of contact sealing interlock, thereby make operated by handwheel more flexibly easily; Meanwhile, even the in the situation that of opening and closing valve continually, can not make the surface of contact of valve body and the valve rod shaft shoulder occur abrasive phenomenon yet;
2) when after valve opening, the step surface close contact of valve base upper end and the valve rod shaft shoulder, but due to the existence of cutting, gas still can be circulated, even if the valve closing outside air outlet, can not cause the temperature rise under natural state of stop valve top yet, thereby also avoid occurring that the gas expansion pressure in sealed air chamber increases, therefore, the performance of valve is more safe and reliable.
Brief description of the drawings
Fig. 1 is the structural representation of cryogenic globe valve in prior art.
Fig. 2 is the structural representation of A-A direction in Fig. 1.
Fig. 3 is the structural representation of the utility model cryogenic globe valve.
Fig. 4 is the structural representation of B-B direction in Fig. 3.
Wherein:
In prior art: 01, handwheel; 02, pressure cap; 03, valve body; 04, suction port; 05, valve rod; 06, air chamber; 07, valve assembly; 08, air outlet;
The utility model: 1, handwheel; 2, pressure cap; 3, the shaft shoulder; 4, valve body; 5, suction port; 6, valve base; 7, air chamber; 8, air outlet; 9, boss; 10, cutting; 11, valve rod.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
The structural representation of the utility model cryogenic globe valve is as shown in Figure 2 known, it comprises handwheel 1, valve rod 11, pressure cap 2, valve body 4 and valve base 6, in valve body 4, there is suction port 5 and the air outlet 8 of connection, handwheel 1 is connected to the upper end of valve rod 11, valve rod 11 middle parts and pressure cap 2 are rotationally connected, the lower end of pressure cap 2 is connected with valve body 4, the middle part of valve rod 11 has the shaft shoulder 3, the upper end of valve base 6 is connected to the lower end of valve rod 11 and is threaded with pressure cap 2 simultaneously, and the lower end of valve base 6 forms valve between suction port 5 and air outlet 8 and by Sealing and valve body 4.The upper end of described valve base 6 shaft shoulder 3 on valve rod 11 has boss 9, has at least one cutting 10 radially on the end face of boss 9.In the present embodiment, the quantity of described cutting 10 is four, along the circumferential direction uniform.The cross section of described cutting 10 is V-arrangement, and the groove depth of the cutting 10 of this V-arrangement is 0.3mm, and the angle that the cell wall of the cutting 10 of V-arrangement forms is 60 °.
The cross section of described valve rod 11 lower ends and the joint of valve base 6 is square, and the matching hole of corresponding valve base 6 is square opening, and the square opening of valve rod 11 lower ends and valve base 6 is slidably matched, and forms air chamber 7 between at the bottom of the bottom of valve rod 11 and the hole of square opening.
Working procedure of the present utility model is as follows: in the time that valve is in running order, by counterclockwise reversing handwheel 1, and handwheel 1 is reversed to maximum, now, in the process of reversing at handwheel, band ovable valve stem 11 rotates, because valve rod 11 bottoms and being connected of valve base 6 are square column and the coordinating of square opening, valve base 6 is rotated simultaneously, screw-thread fit on valve base 6 periphery walls moves up valve base 6, like this in rotation, the valve open of valve base 6 lower ends, suction port 5 communicates with air outlet 8; Valve open is to maximum, and the step surface that is exactly the upper-end surface of valve base 6 and the shaft shoulder 3 places of valve rod 11 offsets.If throttle down makes handwheel 1 clockwise direction reverse.
Claims (4)
1. a cryogenic globe valve, comprise handwheel (1), valve rod (11), pressure cap (2), valve body (4) and valve base (6), in valve body (4), there are suction port (5) and air outlet (8) of connection, handwheel (1) is connected to the upper end of valve rod (11), valve rod (11) middle part is rotationally connected with pressure cap (2), the lower end of pressure cap (2) is connected with valve body (4), the middle part of valve rod (11) has the shaft shoulder (3), the upper end of valve base (6) is connected to the lower end of valve rod (11) and is threaded with pressure cap (2) simultaneously, the lower end of valve base (6) is positioned between suction port (5) and air outlet (8) and by Sealing and valve body (4) and forms valve, it is characterized in that: described valve base (6) has boss (9) towards the upper end of the upper shaft shoulder (3) of valve rod (11) on the end face of boss (9), thering is at least one cutting (10) radially.
2. cryogenic globe valve according to claim 1, is characterized in that: the quantity of described cutting (10) is four, along the circumferential direction uniform.
3. cryogenic globe valve according to claim 2, is characterized in that: the cross section of described cutting (10) is V-arrangement, and the groove depth of the cutting (10) of this V-arrangement is 0.3mm, and the angle that the cell wall of the cutting (10) of V-arrangement forms is 60 °.
4. cryogenic globe valve according to claim 1, it is characterized in that: the cross section of described valve rod (11) lower end and the joint of valve base (6) is square, the matching hole of corresponding valve base (6) is square opening, the square opening of valve rod (11) lower end and valve base (6) is slidably matched, and forms air chamber (7) between at the bottom of the bottom of valve rod (11) and the hole of square opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125753.0U CN203717954U (en) | 2014-03-20 | 2014-03-20 | Low-temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125753.0U CN203717954U (en) | 2014-03-20 | 2014-03-20 | Low-temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717954U true CN203717954U (en) | 2014-07-16 |
Family
ID=51157106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420125753.0U Expired - Fee Related CN203717954U (en) | 2014-03-20 | 2014-03-20 | Low-temperature stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594308A (en) * | 2016-08-10 | 2017-04-26 | 北京卫星环境工程研究所 | Anti-freezing liquid nitrogen Dewar valve |
| CN108953621A (en) * | 2018-08-23 | 2018-12-07 | 江苏华太电力仪表有限公司 | A kind of instrument block valve |
-
2014
- 2014-03-20 CN CN201420125753.0U patent/CN203717954U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594308A (en) * | 2016-08-10 | 2017-04-26 | 北京卫星环境工程研究所 | Anti-freezing liquid nitrogen Dewar valve |
| CN106594308B (en) * | 2016-08-10 | 2018-07-20 | 北京卫星环境工程研究所 | Antifreeze Dewar container for liquefied nitrogen valve |
| CN108953621A (en) * | 2018-08-23 | 2018-12-07 | 江苏华太电力仪表有限公司 | A kind of instrument block valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203823171U (en) | Low-temperature safety valve | |
| CN104329476A (en) | Self-compensated and self-sealed rotation cone valve element and complete set assembly valve | |
| CN203717954U (en) | Low-temperature stop valve | |
| CN202140576U (en) | Low-temperature stop valve | |
| CN102734473B (en) | Rotational-free self-sealing valve | |
| CN203717955U (en) | Low-temperature stop valve | |
| CN105156710B (en) | The cryogenic ball valve of valve seat construction is slided with pretension | |
| CN103953735A (en) | Special angle stop valve for chlor-alkali | |
| CN207715884U (en) | A kind of liquefied petroleum gas steel cylinder angle valve structure of high durable high sealing | |
| CN202371180U (en) | Ultrahigh pressure detecting stop valve | |
| CN102808955A (en) | Dimethyl-ether-resistant steel cylinder valve | |
| CN212360823U (en) | Low-temperature stop valve | |
| CN201221613Y (en) | Switch valve | |
| CN203374867U (en) | Ultra-low temperature ball valve | |
| CN102563091A (en) | Ultrahigh pressure detection stop valve | |
| CN206600504U (en) | A kind of automatic relief valve for double-piston ball valve | |
| CN209213018U (en) | A kind of high temperature butterfly valve of good airproof performance | |
| CN203560490U (en) | Ball valve for gas pipeline | |
| CN105003678A (en) | Self-compensating low-temperature ball valve | |
| CN204387477U (en) | Bellows ball valve | |
| CN204201105U (en) | A kind of multi-sealed stop valve | |
| CN205715937U (en) | Without leaking Magnetic drive ball valve | |
| CN109373004A (en) | A kind of Double-seal valve | |
| CN202733007U (en) | Novel sealing butterfly valve | |
| CN210461761U (en) | Low-temperature ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20180320 |