CN203906850U - High-temperature tight-shutoff control valve external-incision U-shaped seal structure - Google Patents
High-temperature tight-shutoff control valve external-incision U-shaped seal structure Download PDFInfo
- Publication number
- CN203906850U CN203906850U CN201420245166.5U CN201420245166U CN203906850U CN 203906850 U CN203906850 U CN 203906850U CN 201420245166 U CN201420245166 U CN 201420245166U CN 203906850 U CN203906850 U CN 203906850U
- Authority
- CN
- China
- Prior art keywords
- annular boss
- control valve
- lower sleeve
- ring
- spool
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The utility model relates to a high-temperature tight-shutoff control valve external-incision U-shaped seal structure comprising an upper sleeve (1), a lower sleeve (4) and a valve core (2). The structure is characterized in that the side of the lower end face of the upper sleeve (1) adjacent to the valve core (2) is provided with a first annular boss, and the upper end face of the lower sleeve (4) is clamped on the annular boss; the inner wall adjacent to the upper end face of the lower sleeve (4) is provided with a second annular boss; the second annular boss and the first annular boss both contact with the valve core (2) to form a seal cavity, the seal cavity is provided with an annular metal seal ring (3), the cross section of the metal seal ring (3) is in a semicircle shape, and the opening of the semicircle shape is arranged opposite to the valve core (2). By means of trial, it is proved that after the seal structure is applied to a control valve, the leakage level of the entire control valve can meet the requirement of ANSI B16.104 V level easily.
Description
Technical field
The utility model relates to the outer otch U-shaped sealing configuration of a kind of high temperature featuring rigid cutting-off control valve.
Background technique
As shown in Figure 1, traditional sleeve control valve structure be mainly by the tension force of control piston seal ring and sleeve lining closely cooperate and the roughness of valve cage inwall realizes the control of leakage rate, opening at high temperature media by spool and sleeve seal face and piston packing ring produces certain leakage rate, if the tension force of piston packing ring is little or the roughness of sleeve and valve core sealed cover, form and position tolerance do not reach requirement, its leakage rate is difficult to meet the requirement of ANSI B16.104 IV level, and V level does not more just realize.And structure shown in Fig. 2 is the balanced seal coil structures sealing that adopts Teflon material to make between valve cage, this structure can realize the requirement of ANSI B16.104V level, but because balanced seal loop material serviceability temperature can only arrive 260 ℃, when medium temperature is higher, can not meet working condition requirement.
Model utility content
The purpose of this utility model is to provide the outer otch U-shaped sealing configuration of a kind of high temperature featuring rigid cutting-off control valve, can realize control valve featuring rigid cutting-off and have higher leakage class when high temperature and High Pressure Difference.
The outer otch U-shaped sealing configuration of a kind of high temperature featuring rigid cutting-off control valve, comprise upper bush, lower sleeve and spool, its specialization is: the side near spool on the lower end surface of described upper bush is provided with the first annular boss, the upper-end surface of described lower sleeve is stuck on this annular boss, and be provided with the second annular boss on the other inwall in the upper-end surface of this lower sleeve, thereby this second annular boss all contacts formation Seal cage with described spool with aforesaid the first annular boss, the metal o-ring of ring-type is installed in sealing chamber, the cross section of this metal o-ring is semicircular arc, and the opening of this semicircular arc is spool dorsad.
Wherein the cross section of metal o-ring is semicircle, and its material is nickel base superalloy.
Wherein parallel between the axis of the first annular boss and upper bush, and vertical between the axis of the second annular boss and lower sleeve.
Wherein on lower sleeve, have through hole, and one end of this through hole is communicated with Seal cage.
Through probationary certificate, control valve adopts after sealing configuration of the present utility model, control valve complete machine control valve leakage class is easy to meet the requirement of ANSI B16.104V level, adopt this outer otch U-shaped close, through overtesting, can be used in 425 ℃ of temperature, reliably working in the high temperature and high pressure steam pressure-adjusting control valve of pressure reduction 4.5MPa.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the utility model background technique;
Accompanying drawing 2 is the structural representation of the utility model background technique;
Accompanying drawing 3 is structural representation of the present utility model;
Accompanying drawing 4 is the partial enlarged drawing at A place in Fig. 3.
Embodiment
As Fig. 3, shown in 4, the utility model is the outer otch U-shaped sealing configuration of a kind of high temperature featuring rigid cutting-off control valve, comprise upper bush 1, lower sleeve 4 and spool 2, a side near spool 2 on the lower end surface of described upper bush 1 is provided with the first annular boss, the upper-end surface of described lower sleeve 4 is stuck on this annular boss, and be provided with the second annular boss on the other inwall in the upper-end surface of this lower sleeve 4, thereby this second annular boss all contacts formation Seal cage with described spool 2 with aforesaid the first annular boss, the metal o-ring 3 of ring-type is installed in sealing chamber, the cross section of this metal o-ring 3 is semicircular arc, and the opening of this semicircular arc is spool 2 (i.e. right side in Fig. 4) dorsad.
Wherein on lower sleeve 4, have through hole, and one end of this through hole is communicated with Seal cage.By the through hole on lower sleeve 4, upstream pressure can be introduced in metal o-ring 3 openings, impel seal ring to produce distortion, thereby provide seal pressure for seal ring seals.
Wherein the cross section of metal o-ring 3 is semicircle, and its material is Inconel (X-) 750.Parallel between the axis of other the first annular boss and upper bush 1, and vertical between the axis of the second annular boss and lower sleeve 4.
Working principle of the present utility model is:
When control valve is closed, high temperature media enters from control valve right side, during through spool 2, sleeve, the interior side contacts of metal o-ring 3 of spool 2 sealing valve lines and interior otch U-shaped, and in metal o-ring 3 its U-shaped mouths of interior otch U-shaped, be subject to the pressure-acting of high-pressure medium, produce resiliently deformable, realize the featuring rigid cutting-off between spool 2 and sleeve.
Claims (4)
1. the outer otch U-shaped sealing configuration of a high temperature featuring rigid cutting-off control valve, comprise upper bush (1), lower sleeve (4) and spool (2), it is characterized in that: the side near spool (2) on the lower end surface of described upper bush (1) is provided with the first annular boss, the upper-end surface of described lower sleeve (4) is stuck on this annular boss, and be provided with the second annular boss on the other inwall in the upper-end surface of this lower sleeve (4), this second annular boss and aforesaid the first annular boss all with described spool (2) thus contact and form Seal cage, the metal o-ring (3) of ring-type is installed in sealing chamber, the cross section of this metal o-ring (3) is semicircular arc, and the opening of this semicircular arc is spool (2) dorsad.
2. the outer otch U-shaped sealing configuration of high temperature featuring rigid cutting-off control valve as claimed in claim 1, is characterized in that: wherein the cross section of metal o-ring (3) is for semicircle, and its material is nickel base superalloy.
3. the outer otch U-shaped sealing configuration of high temperature featuring rigid cutting-off control valve as claimed in claim 1, it is characterized in that: wherein parallel between the axis of the first annular boss and upper bush (1), and vertical between the axis of the second annular boss and lower sleeve (4).
4. the outer otch U-shaped sealing configuration of the high temperature featuring rigid cutting-off control valve as described in any one in claims 1 to 3, is characterized in that: wherein on lower sleeve (4), have through hole, and one end of this through hole is communicated with Seal cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420245166.5U CN203906850U (en) | 2014-05-14 | 2014-05-14 | High-temperature tight-shutoff control valve external-incision U-shaped seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420245166.5U CN203906850U (en) | 2014-05-14 | 2014-05-14 | High-temperature tight-shutoff control valve external-incision U-shaped seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906850U true CN203906850U (en) | 2014-10-29 |
Family
ID=51781131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420245166.5U Expired - Lifetime CN203906850U (en) | 2014-05-14 | 2014-05-14 | High-temperature tight-shutoff control valve external-incision U-shaped seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218401A (en) * | 2017-04-17 | 2017-09-29 | 江苏盐阜电站阀门辅机制造有限公司 | A kind of flow adjustable type stop valve for power station |
-
2014
- 2014-05-14 CN CN201420245166.5U patent/CN203906850U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218401A (en) * | 2017-04-17 | 2017-09-29 | 江苏盐阜电站阀门辅机制造有限公司 | A kind of flow adjustable type stop valve for power station |
| CN107218401B (en) * | 2017-04-17 | 2019-02-26 | 江苏盐阜电站阀门辅机制造有限公司 | A kind of flow adjustable type shut-off valve for power station |
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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 |
Granted publication date: 20141029 |
|
| CX01 | Expiry of patent term |