CN202659955U - Top-mounted low-temperature fixed ball valve - Google Patents
Top-mounted low-temperature fixed ball valve Download PDFInfo
- Publication number
- CN202659955U CN202659955U CN 201220288912 CN201220288912U CN202659955U CN 202659955 U CN202659955 U CN 202659955U CN 201220288912 CN201220288912 CN 201220288912 CN 201220288912 U CN201220288912 U CN 201220288912U CN 202659955 U CN202659955 U CN 202659955U
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- Prior art keywords
- valve
- valve seat
- low temperature
- fixing ball
- temperature fixing
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Abstract
The utility model discloses a top-mounted low-temperature fixed ball valve, which comprises a valve body, a valve seat, a ball body, a valve rod and a valve cover, wherein through holes in the valve body, the valve seat and the ball body are connected to form a fluid channel; and the valve seat comprises an upstream valve seat and a downstream valve seat. The top-mounted low-temperature fixed ball valve is characterized in that a communication groove is formed at a joint of the upstream valve seat and the ball body and communicated with the fluid channel and a valve middle cavity; and a sealing structure is arranged on the downstream valve seat. The overpressure of the middle cavity can be avoided, requirements on a sealing piece are reduced, internal leakage and external leakage are strictly controlled, and the middle cavity is particularly applicable to a low-temperature valve with a lengthened valve cover structure. An experiment shows that by adoption of the structure, the top-mounted low-temperature fixed ball valve reliably operates at low temperature, the leakage of the valve seat meets a standard requirement, and the top-mounted low-temperature fixed ball valve can be truly maintained on line.
Description
Technical field
The utility model relates to a kind of valve, and Subzero valve especially is specifically related to a kind of for the fixing ball valve of spherical structure of dress formula in the employing of cryogenic media.
Background technique
Along with continuing to increase of dynamics developed to LNG Liquefied natural gas in international energy market, it is more wide that the application market of Subzero valve also becomes.Simultaneously, the low temperature industries such as domestic LNG Liquefied natural gas (LNG) are also developing rapidly, to the Subzero valve demand also in continuous growth.
Ball valve adopts spheroid as open-shut device, because it has the trust that many-sided advantages such as flow resistance is little, simple in structure, sealing is reliable, swift to operate are subject to the client more and more.In the prior art, the structure of ball valve generally includes, and valve body, is arranged on the valve seat in the valve body, the spheroid that is connected with valve base sealing, valve gap are connected with valve rod with spheroid, and valve rod and valve cover chamber generally are provided with packing seal, the rotation of the rotation control spheroid by valve rod realizes the keying of valve.When being used for cryogen, valve rod and valve gap are lengthened out.
Fixing ball valve is compared with floating ball valve, during work, hydrodynamic pressure all passes to bearing at the active force that spheroid produces before the valve, spheroid is moved to valve seat, thereby valve seat can not bear excessive pressure, so the torque of fixing ball valve is little, the valve seat distortion is little, sealability is stable, long service life, is applicable to high pressure, heavy caliber occasion.
For the low temperature fixing ball valve, commonly side-mounted.Yet upper-mounting type ball valve has the outer leak source of minimizing, reduces pipe stress to the more advantages such as impact of flange in the side-mounted valve.Upper-mounting type ball valve is rapidly simple in the pipeline dismounting, and is easy to maintenance quick.When valve breaks down when needing repairing at pipeline, needn't dismantle valve from pipeline, need only dismantle middle flange bolt and nut are taken off valve gap and valve rod group component together from valve body, then take out spheroid and valve seat combination part.Can on-line maintenance spheroid and valve seat.The time has been saved in this maintenance, and the loss in producing is dropped to minimum point.
But under worst cold case, upper dress formula fixing ball valve is high to the requirement of Sealing (valve base sealing ring, general plug sealing ring), and is very high to the required precision of part, and particularly the size of valve body and form and position tolerance required precision are high.And owing to there is cryogenic media, the cavity Nei Yiyin between valve lumen and lengthening valve gap and valve rod is heated and the superpressure situation occurs.
Summary of the invention
Goal of the invention of the present utility model provides a kind of upper dress formula low temperature fixing ball valve, by architecture advances, improves the sealability of valve, reduces the requirement to the valve preparation process.
To achieve the above object of the invention, the technical solution adopted in the utility model is: a kind of upper dress formula low temperature fixing ball valve, comprise valve body, valve seat, spheroid, valve rod and valve gap, through hole on valve body, valve seat, the spheroid links to each other and consists of the fluid passage, described valve seat comprises upstream valve seat and downstream valve seat, described upstream valve seat is offering connectivity slot with the spheroid junction, and described connectivity slot is communicated with described fluid passage and valve lumen, and described downstream valve seat is provided with the sealing configuration that comprises general plug sealing ring.
Above, by the different designs to the upstream and downstream valve seat, so that the valve lumen is communicated with the fluid passage of valve downstream, avoid the lumen superpressure.Thus, reduced pressure to each sealing configuration.
Further technological scheme is provided with annular projection in described stem bottom, and correspondence is provided with inverted step on the described valve gap, consists of valve gap to the limit structure of valve rod.After adopting this structure, valve rod is packed into from the bottom of valve gap, has the anti-function that blows out of real valve rod.
In the technique scheme, described valve gap and valve rod top are provided with stuffing box packing, the adjacent general plug sealing ring installation position that is provided with described stuffing box packing.
Described valve gap and valve body cooperation place are provided with gasket seal, and are provided with general plug sealing ring installation position.Usually adopt gasket seal, when seal request was higher, general plug sealing ring was provided with general plug sealing ring in the installation position, consisted of combined sealing structure by gasket seal and general plug sealing ring.By two seals, strictly avoid leaking outside.
In the technique scheme, be provided with preloading spring between described valve seat and valve body.
Described bonnet lower is provided with the relief hole that is communicated with cavity and valve lumen between valve gap and valve rod.
Be provided with the graphite fire-protection ring between described upstream valve seat and valve body.
Because technique scheme is used, the utility model compared with prior art has following advantages:
1. the utility model arranges connectivity slot at the upstream valve seat, and lumen can superpressure, has reduced the requirement to Sealing, and two way sealed is realized in the downstream.
2. the special sealing configuration of the utility model downstream valve seat buying leaks in the strict control; Valve rod and lumen adopt combination seal effectively to guarantee without leaking outside good seal performance.
3. the utility model valve rod is packed into from the valve gap downside, has the real anti-function that blows out.
4. the utility model is provided with relief hole in the bottom of valve gap, and the neck cavity is communicated with the valve lumen, thereby has avoided the cavity of valve gap the superpressure phenomenon to occur, is particularly suitable for adopting the Subzero valve that lengthens valve cover structure to use.
5. experiment shows that structure of the present utility model can guarantee reliable operation under low temperature-196 ℃ condition; Valve repeatedly behind the cycling switch, can keep complete, the not damaged in pressure boundary, and action is normal, and moment of torsion is low, and valve seat leakage satisfies standard-required, and its maximum advantage is the on-line maintenance that can realize truly.
Description of drawings
Fig. 1 is the utility model embodiment's structure cross-sectional schematic.
Fig. 2 is the enlarged diagram of I section among Fig. 1.
Fig. 3 is the enlarged diagram of II section among Fig. 1.
Wherein: 1, valve body; 2, valve gap; 3, upstream valve seat; 4, spheroid; 5, valve rod; 6, downstream valve seat; 7, connectivity slot; 8, graphite fire-protection ring; 9, relief hole; 10, annular projection.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: referring to accompanying drawing 1 to shown in the accompanying drawing 3, a kind of upper dress formula low temperature fixing ball valve, comprise valve body 1, be arranged on the valve seat in the valve body 1, spheroid 4 with the valve seat fitted seal, the valve rod 5 that is connected with spheroid 4 and be set on the valve rod 5 and with the fixing valve gap 2 of valve seal, valve body 1, valve seat, through hole on the spheroid 4 links to each other and consists of the fluid passage, described valve seat comprises upstream valve seat 3 and downstream valve seat 6, described upstream valve seat 3 is offering connectivity slot 7 with the spheroid junction, described connectivity slot 7 is communicated with described fluid passage and valve lumen, and 1 of upstream valve seat 3 and valve body are provided with graphite fire-protection ring 8; Described downstream valve seat 6 is provided with the sealing configuration that general plug sealing ring consists of.Described valve gap 2 and valve rod 5 tops are provided with stuffing box packing, and the adjacent general plug sealing ring installation position that is provided with described stuffing box packing, described valve gap 2 bottoms are provided with the relief hole 9 that is communicated with cavity and valve lumen between valve gap and valve rod.Described valve gap 2 is provided with the combined sealing structure that is made of pad and general plug sealing ring with valve body 1 cooperation place.Be provided with preloading spring between valve seat and valve body.
In the present embodiment, be provided with annular projection 10 in described stem bottom, correspondence is provided with inverted step on the described valve gap, consists of valve gap to the limit structure of valve rod.
Claims (8)
1. go up dress formula low temperature fixing ball valve for one kind, comprise valve body, valve seat, spheroid, valve rod and valve gap, through hole on valve body, valve seat, the spheroid links to each other and consists of the fluid passage, described valve seat comprises upstream valve seat and downstream valve seat, it is characterized in that: described upstream valve seat is offering connectivity slot with the spheroid junction, described connectivity slot is communicated with described fluid passage and valve lumen, and described downstream valve seat is provided with the sealing configuration that comprises general plug sealing ring.
2. upper dress formula low temperature fixing ball valve according to claim 1, it is characterized in that: be provided with annular projection in described stem bottom, correspondence is provided with inverted step on the described valve gap, consists of valve gap to the limit structure of valve rod.
3. upper dress formula low temperature fixing ball valve according to claim 1, it is characterized in that: described valve gap and valve rod top are provided with stuffing box packing, the adjacent general plug sealing ring installation position that is provided with described stuffing box packing.
4. upper dress formula low temperature fixing ball valve according to claim 1, it is characterized in that: described valve gap and valve body cooperation place are provided with gasket seal, and are provided with general plug sealing ring installation position.
5. upper dress formula low temperature fixing ball valve according to claim 4, it is characterized in that: described general plug sealing ring is provided with general plug sealing ring in the installation position, consists of combined sealing structure by gasket seal and general plug sealing ring.
6. upper dress formula low temperature fixing ball valve according to claim 1 is characterized in that: be provided with preloading spring between described valve seat and valve body.
7. upper dress formula low temperature fixing ball valve according to claim 1 is characterized in that: described bonnet lower is provided with the relief hole that is communicated with cavity and valve lumen between valve gap and valve rod.
8. upper dress formula low temperature fixing ball valve according to claim 1 is characterized in that: be provided with the graphite fire-protection ring between described upstream valve seat and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288912 CN202659955U (en) | 2012-06-19 | 2012-06-19 | Top-mounted low-temperature fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288912 CN202659955U (en) | 2012-06-19 | 2012-06-19 | Top-mounted low-temperature fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659955U true CN202659955U (en) | 2013-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220288912 Expired - Lifetime CN202659955U (en) | 2012-06-19 | 2012-06-19 | Top-mounted low-temperature fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659955U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705525A (en) * | 2012-06-19 | 2012-10-03 | 苏州纽威阀门股份有限公司 | Top-entry low-temperature fixed ball valve |
| CN103527808A (en) * | 2013-10-30 | 2014-01-22 | 苏州纽威阀门股份有限公司 | Ball valve |
| CN104989843A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Ultralow-temperature metal hard seal floating ball valve |
| CN106151574A (en) * | 2016-08-19 | 2016-11-23 | 方正阀门集团有限公司 | Ultra-low temperature ball valve valve base sealing structure |
| CN106523729A (en) * | 2015-09-10 | 2017-03-22 | 中国石油天然气集团公司 | Low-temperature top-assembling type fixed ball valve |
-
2012
- 2012-06-19 CN CN 201220288912 patent/CN202659955U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705525A (en) * | 2012-06-19 | 2012-10-03 | 苏州纽威阀门股份有限公司 | Top-entry low-temperature fixed ball valve |
| CN103527808A (en) * | 2013-10-30 | 2014-01-22 | 苏州纽威阀门股份有限公司 | Ball valve |
| CN103527808B (en) * | 2013-10-30 | 2016-06-08 | 苏州纽威阀门股份有限公司 | A kind of ball valve |
| CN104989843A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Ultralow-temperature metal hard seal floating ball valve |
| CN106523729A (en) * | 2015-09-10 | 2017-03-22 | 中国石油天然气集团公司 | Low-temperature top-assembling type fixed ball valve |
| CN106151574A (en) * | 2016-08-19 | 2016-11-23 | 方正阀门集团有限公司 | Ultra-low temperature ball valve valve base sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |