CN202140576U - Low-temperature stop valve - Google Patents
Low-temperature stop valve Download PDFInfo
- Publication number
- CN202140576U CN202140576U CN201120228655U CN201120228655U CN202140576U CN 202140576 U CN202140576 U CN 202140576U CN 201120228655 U CN201120228655 U CN 201120228655U CN 201120228655 U CN201120228655 U CN 201120228655U CN 202140576 U CN202140576 U CN 202140576U
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- valve
- pressure cap
- valve rod
- seal ring
- handwheel
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Abstract
The utility model discloses a low-temperature stop valve, wherein a sealing device of the low-temperature step valve comprises the following components: a pressure cap (10), a sealing gasket (8), a sealing ring (7), a pressure sleeve (6) and a pressure adjusting device. The pressure adjusting device is provided in a hand wheel (1) and is connected with one end of a valve rod (5). The pressure rod (5) is provided in the pressure cap (10) and is sealed through the sealing gasket (8) and the sealing ring (7). A valve device is connected with the pressure cap (10) through threaded connection. The pressure cap (10) is connected with a valve body (11) through threaded connection. The pressure sleeve (6) is provided in the pressure cap (10) through close fit and is tightly compressed with the sealing ring (7). Thus, axial sealing of the sealing gasket between a shaft shoulder and the pressure cap of the valve rod is formed; and radial sealing of the sealing ring is formed between the valve rod and the pressure cap. Stable and reliable sealing effect is obtained. Simultaneously, the lengths of the valve rod and the pressure cap in the axial direction are smaller. The low-temperature stop valve further has the following advantages: easy operation, improved valve rigidity, and reduced production cost.
Description
Technical field
The utility model relates to valve field, specifically is a kind of cryogenic globe valve.
Background technique
Cryogenic globe valve as the use of cut-out, adjusting or throttling, is one of pipe-line system annex often, is mainly used in the warehousing and transportation facilities and associated pipe of liquefied gas at low temp such as liquid oxygen, liquid argon, liquid nitrogen and LNG Liquefied natural gas.The structure of the cryogenic globe valve of existing technology comprises: valve gap is installed on the valve body; Handwheel is fixedly mounted on the valve rod, and valve rod matches with valve gap through screw thread, and spool is fixed on the lower end of valve rod; Valve stem casing and valve gap fix; Gland nut matches with valve stem casing through screw thread, and gland nut is pressed on the gland, and gland is pressed in seal ring on the back-up ring between valve rod and the valve stem casing.Come rotation valve rod through rotation hand wheel, and can drive spool and move up and down, thereby realize opening or closing the purpose of valve.But, the shortcoming below the cryogenic globe valve of this structure exists:
1) when the valve access times too much; Perhaps receive under the situation of low temperature effect overlong time, permanent deformation can take place and lose part elasticity in seal ring, between valve rod and seal ring, forms micro-gap; Thereby cause micro-leakage, this leakage is more obvious in the rotation process of valve rod; Therefore, the client will constantly be wrenched gland nut and make gland constantly compress seal ring in use for some time, impels seal ring to keep the better seal state, does very trouble of not only operation like this, and sealing effect is also undesirable;
2) in addition; The cryogenic globe valve of existing technology generally is designed to the long-neck valve cover structure, with the temperature that guarantees packing box seal circle bottom more than 0 ℃, and for the less cryogenic globe valve of latus rectum; When adopting this long-neck valve cover structure, the volume potential of valve must huge, the also corresponding increase of cost; Simultaneously, the rigidity of valve is relatively poor, and speed ratio is more painstaking.
The model utility content
The utility model technical problem to be solved is, a kind of good sealing effect is provided, and can reduce cost, improve the rigidity of valve and operate cryogenic globe valve easily simultaneously.
For solving the problems of the technologies described above, the cryogenic globe valve that the utility model provides comprises valve body, handwheel, valve rod, seal arrangement and valve arrangement; One end of described valve rod is connected with handwheel, and the other end is connected with valve arrangement, and valve rod is connected with valve body through seal arrangement; Described seal arrangement comprises pressure cap, sealing gasket, seal ring, gland and pressure regulator; Described pressure regulator is positioned at handwheel and is connected with an end of valve rod, and described valve rod is positioned at pressure cap and through sealing gasket and seal ring sealing, valve arrangement is threaded with pressure cap; Pressure cap is threaded with valve body, and described gland is a tight fit in the pressure cap and with seal ring and compresses.
Described pressure unit comprises handwheel cover and spring, and described handwheel has the cavity of ability putting spring, and spring housing is combined in an end of valve rod, and an end of spring pushes against the bottom surface at cavity, and the other end pushes against on handwheel cover, and described handwheel cover is connected with threaded stem; Described valve rod has the shaft shoulder, and the end face of the described sealing gasket and the shaft shoulder pushes against.
Described sealing gasket is made up of major diameter annulus and minor diameter annulus, and the end face of the exterior edge face of major diameter annulus and the shaft shoulder of valve rod pushes against, and the interior edge face and the pressure cap of major diameter annulus push against; Described minor diameter annulus is round table-like, and its tapering is 5 °～7 °.
The surface of contact of the described shaft shoulder, pressure cap and major diameter annulus all has bulge loop.
The cross section of described seal ring is the V-arrangement of the traverse of middle past evagination, and described pressure cap has the horn mouth that matches with the following conical surface of seal ring outer surface, and the lower end of described gland has the horn mouth that matches with the last conical surface of seal ring outer surface.
The angle of the outer coign of described sealing gasket cross section is 100 °～110 °, and the angle of corresponding interior re-entrant angle is 80 °～90 °.
Described pressure cap and valve body have metal o-ring in the axial direction.
Described valve arrangement comprises spool and seal ring; One end of described spool is threaded with pressure cap with the valve rod socket simultaneously; The end of the other end is round table-like; Have the round table surface that matches with spool in the valve body, described seal ring is embedded in the end of spool round platform portion and pushes against with valve body or throw off.
After adopting above structure, the utility model compared with prior art has the following advantages:
1) owing to the seal arrangement between valve rod and the pressure cap is sealed by sealing gasket and seal ring; And make sealing gasket and seal ring produce resiliently deformable through pressure regulator; At this moment, sealing gasket forms axial seal between the shaft shoulder of valve rod and pressure cap, reliable for effect; Seal ring forms radial seal between valve rod and pressure cap simultaneously, and sealing effect is very stable;
2) in addition, the pressure regulator of this stop valve is arranged in the handwheel, therefore; Valve rod and the pressure cap length on axial direction is all shorter; Avoided the elongated shape of existing product, in easy-to-operat, also increased the rigidity of valve and processed more convenient; Practice thrift raw material again, reduced cost of production.
Description of drawings
Fig. 1 is the sectional structure schematic representation of the utility model cryogenic globe valve.
Fig. 2 is the structural representation of the utility model seal ring.
Fig. 3 is the structural representation of the utility model sealing gasket.
Fig. 4 is the structure for amplifying schematic representation of A portion among Fig. 1.
Wherein: 1, handwheel; 2, cavity; 3, spring; 4, handwheel cover; 5, valve rod; 6, gland; 7, seal ring; 8, sealing gasket; 81, minor diameter annulus; 82, major diameter annulus; 9, the shaft shoulder; 10, pressure cap; 11, valve body; 12, spool; 13, metal o-ring; 14, seal ring; 15, bulge loop; α, outer coign; β, interior re-entrant angle; θ, tapering.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done explanation in further detail.
Structural representation by the utility model cryogenic globe valve of Fig. 1～shown in Figure 4 can be known; It comprises valve body 11, handwheel 1, valve rod 5, seal arrangement and valve arrangement; One end of described valve rod 5 is connected with handwheel 1; The other end is connected with valve arrangement, and valve rod 5 is connected with valve body 11 through seal arrangement.Described seal arrangement comprises pressure cap 10, sealing gasket 8, seal ring 7, gland 6 and pressure regulator; Described pressure regulator is positioned at handwheel 1 and is connected with an end of valve rod 5; Described valve rod 5 is positioned at pressure cap 10 and seals through sealing gasket 8 and seal ring 7; Valve arrangement is threaded with pressure cap 10, and pressure cap 10 is threaded with valve body 11, and described gland 6 is a tight fit in the pressure cap 10 and with seal ring 7 and compresses.In the present embodiment, handwheel 1 is meant that with being connected of valve rod 5 square tenon in handwheel 1 has, valve rod 5 have the foreign side's tenon that matches with it.
Described pressure unit comprises handwheel cover 4 and spring 3; Described handwheel 1 has the cavity 2 of ability putting spring 3, and spring 3 is linked in an end of valve rod 5, and an end of spring 3 pushes against the bottom surface at cavity 2; The other end pushes against on handwheel cover 4, and described handwheel cover 4 is threaded with valve rod 5; Described valve rod 5 has the shaft shoulder 9, and described sealing gasket 8 pushes against with the end face of the shaft shoulder 9.
Described sealing gasket 8 is made up of major diameter annulus 82 and minor diameter annulus 81, and the end face of the shaft shoulder 9 of the exterior edge face of major diameter annulus 82 and valve rod 5 pushes against, and the interior edge face of major diameter annulus 82 and pressure cap 10 push against; Described minor diameter annulus 81 is round table-like, and its taper theta is 5 °～7 °, and this structure is convenient to assembling.
The described shaft shoulder 9, pressure cap 10 all have bulge loop 15 with the surface of contact of major diameter annulus 82.The cross section of bulge loop 15 can be a triangle, can be square, also can be semicircle, and what adopt in the present embodiment is triangle.Under the effect of spring 3, the bulge loop 15 on the shaft shoulder 9 and the pressure cap 10 is absorbed in the sealing gasket 8, makes sealing gasket 7 produce resiliently deformables, forms sealing.
The cross section of described seal ring 7 is the V-arrangement of the traverse of middle past evagination, and described pressure cap 10 has the horn mouth that matches with the following conical surface of seal ring 7 outer surfaces, and the lower end of described gland 6 has the horn mouth that matches with the last conical surface of seal ring 7 outer surfaces.
The angle of the outer coign α of described sealing gasket 8 cross sections is 100 °～110 °, and the angle of corresponding interior re-entrant angle β is 80 °～90 °.
Described pressure cap 10 has metal o-ring 13 in the axial direction with valve body 11.Metal o-ring 13 in the present embodiment is generally processed by red copper, not only guarantees sealing but also increase mechanical strength.
Described valve arrangement comprises spool 12 and seal ring 14; One end of described spool 12 and valve rod 5 sockets be threaded with pressure cap 10 simultaneously (this structure can block cryogenic liquide on let out); The end of the other end is round table-like; Have the round table surface that matches with spool 12 in the valve body 11, described seal ring 14 is embedded in the end of spool 12 round platform portions and pushes against with valve body 11 or throw off.In the present embodiment, spool 12 is meant that with the socket of valve rod 5 square tenon in spool 12 has, valve rod 5 have the foreign side's tenon that matches with it.
The working principle of the utility model cryogenic globe valve is following:
Opening and closing through handwheel 1 of this product controlled, and handwheel 1 counterclockwise rotates to be unlatching.
When the valve closed condition was rotated counterclockwise, handwheel 1 drove valve rod 5, valve rod 5 drives the valve arrangement spirals and rises with handwheel 1, made seal ring 14 break away from the suction port of valve bodies 11, made suction port communicate Open valve with the air outlet.
When the opening of valves state turned clockwise, handwheel 1 drove valve rod 5, valve rod 5 drives the valve arrangement spirals and descends, and seal ring 14 is pressed on the suction port of valve body 11, makes suction port not communicate throttle down with the air outlet with handwheel 1.
The liquid that when valve open, flows into suction port flows out from the air outlet through valve body 11; Though because the spool of valve arrangement 12 and the screw connection structure of pressure cap 10 can play the effect of retardance leaked liquid, can not seal fully, still some small amount of liquid can release from the gap of the spool 12 of valve arrangement and pressure cap 10; When the liquid that releases arrives the position of sealing gasket 8; Because the heat-absorbing action of valve body 11, temperature can rise gradually, when temperature rises to more than 0 ℃; Will convert gas leak to, sealing gasket 8 has blocked leaking of this part gas.
Valve in use, the rotation meeting of valve rod 5 causes wearing and tearing to Sealing, with the passing of time might cause leakage, and seal ring 7 has remedied this defective, thereby makes sealing more reliable, and has correspondingly prolonged the working life of valve.
Claims (8)
1. cryogenic globe valve; Comprise valve body (11), handwheel (1), valve rod (5), seal arrangement and valve arrangement; One end of described valve rod (5) is connected with handwheel (1); The other end is connected with valve arrangement; And valve rod (5) is connected with valve body (11) through seal arrangement, and it is characterized in that: described seal arrangement comprises pressure cap (10), sealing gasket (8), seal ring (7), gland (6) and pressure regulator, and described pressure regulator is positioned at handwheel (1) and is connected with an end of valve rod (5); Described valve rod (5) is positioned at pressure cap (10) and seals through sealing gasket (8) and seal ring (7); Valve arrangement is threaded with pressure cap (10), and pressure cap (10) is threaded with valve body (11), and described gland (6) is a tight fit in the pressure cap (10) and with seal ring (7) and compresses.
2. cryogenic globe valve according to claim 1; It is characterized in that: described pressure unit comprises handwheel cover (4) and spring (3); Described handwheel (1) has the cavity (2) of ability putting spring (3), and spring (3) is linked in an end of valve rod (5), and an end of spring (3) pushes against the bottom surface in cavity (2); The other end pushes against on handwheel cover (4), and described handwheel cover (4) is threaded with valve rod (5); Described valve rod (5) has the shaft shoulder (9), and described sealing gasket (8) pushes against with the end face of the shaft shoulder (9).
3. cryogenic globe valve according to claim 2; It is characterized in that: described sealing gasket (8) is made up of major diameter annulus (82) and minor diameter annulus (81); The end face of the shaft shoulder (9) of the exterior edge face of major diameter annulus (82) and valve rod (5) pushes against, and the interior edge face of major diameter annulus (82) and pressure cap (10) push against; Described minor diameter annulus (81) is round table-like, and its tapering (θ) is 5 °～7 °.
4. cryogenic globe valve according to claim 3 is characterized in that: the described shaft shoulder (9), pressure cap (10) all have bulge loop (15) with the surface of contact of major diameter annulus (82).
5. cryogenic globe valve according to claim 2; It is characterized in that: the cross section of described seal ring (7) is the V-arrangement of the traverse of middle past evagination; Described pressure cap (10) has the horn mouth that matches with the following conical surface of seal ring (7) outer surface, and the lower end of described gland (6) has the horn mouth that matches with the last conical surface of seal ring (7) outer surface.
6. cryogenic globe valve according to claim 5 is characterized in that: the angle of the outer coign (α) of described sealing gasket (8) cross section is 100 °～110 °, and the angle of corresponding interior re-entrant angle (β) is 80 °～90 °.
7. cryogenic globe valve according to claim 1 is characterized in that: described pressure cap (10) has metal o-ring (13) in the axial direction with valve body (11).
8. cryogenic globe valve according to claim 1; It is characterized in that: described valve arrangement comprises spool (12) and seal ring (14); One end of described spool (12) is threaded with pressure cap (10) with valve rod (5) socket simultaneously; The end of the other end is round table-like, has the round table surface that matches with spool (12) in the valve body (11), and described seal ring (14) is embedded in the end of spool (12) round platform portion and pushes against with valve body (11) or throw off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228655U CN202140576U (en) | 2011-07-01 | 2011-07-01 | Low-temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228655U CN202140576U (en) | 2011-07-01 | 2011-07-01 | Low-temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202140576U true CN202140576U (en) | 2012-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120228655U Expired - Fee Related CN202140576U (en) | 2011-07-01 | 2011-07-01 | Low-temperature stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202140576U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| CN104676096A (en) * | 2015-03-10 | 2015-06-03 | 宁波金佳佳阀门有限公司 | Liquefied dimethyl ether cylinder valve |
| LU92493B1 (en) * | 2014-07-04 | 2016-01-05 | Luxembourg Patent Co Sa | Shut-off valve for liquified natural gas |
| CN105221771A (en) * | 2015-10-29 | 2016-01-06 | 江南工业集团有限公司 | A kind of low temperature cut-off flow-limiting valve |
| CN106870778A (en) * | 2017-03-23 | 2017-06-20 | 罗达莱克斯阀门(上海)有限公司 | A kind of ultralow temperature filling valve |
-
2011
- 2011-07-01 CN CN201120228655U patent/CN202140576U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| CN102588616B (en) * | 2012-03-09 | 2015-03-11 | 秦立臣 | Stop valve for low-temperature liquid containers and assembling method thereof |
| LU92493B1 (en) * | 2014-07-04 | 2016-01-05 | Luxembourg Patent Co Sa | Shut-off valve for liquified natural gas |
| WO2016001247A1 (en) * | 2014-07-04 | 2016-01-07 | Luxembourg Patent Company S.A. | Shut-off valve for liquified natural gas |
| CN106662257A (en) * | 2014-07-04 | 2017-05-10 | 卢森堡专利公司 | Shut-off valve for liquified natural gas |
| US20170146134A1 (en) * | 2014-07-04 | 2017-05-25 | Luxembourg Patent Company S.A. | Shut-Off Valve For Liquefied Natural Gas |
| CN104676096A (en) * | 2015-03-10 | 2015-06-03 | 宁波金佳佳阀门有限公司 | Liquefied dimethyl ether cylinder valve |
| CN105221771A (en) * | 2015-10-29 | 2016-01-06 | 江南工业集团有限公司 | A kind of low temperature cut-off flow-limiting valve |
| CN106870778A (en) * | 2017-03-23 | 2017-06-20 | 罗达莱克斯阀门(上海)有限公司 | A kind of ultralow temperature filling valve |
| CN106870778B (en) * | 2017-03-23 | 2019-12-10 | 罗达莱克斯阀门(上海)有限公司 | valve for ultralow temperature filling |
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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 |
Granted publication date: 20120208 Termination date: 20140701 |
|
| EXPY | Termination of patent right or utility model |