CN205173517U - Dual seal stop valve - Google Patents
Dual seal stop valve Download PDFInfo
- Publication number
- CN205173517U CN205173517U CN201520987711.2U CN201520987711U CN205173517U CN 205173517 U CN205173517 U CN 205173517U CN 201520987711 U CN201520987711 U CN 201520987711U CN 205173517 U CN205173517 U CN 205173517U
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- valve body
- valve
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- spool
- valve rod
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Abstract
Dual seal stop valve relates to the structure of valve, including valve body, valve rod, filler, gland and support bracket, build -up welding cone -shaped surface seal alloy -layer and flat seal alloy -layer in the valve body, case and outer case in setting up in the valve body, interior case nestification is the case in outer case and stretching out outside, and valve rod threaded connection in outer case and the valve body welds, sets up belleville spring in the case outside, including the belleville spring setting between case and the valve rod, including the surface of case set up conical surface sealing member, the conical surface sealing member of interior case and the sealed alloy -layer of the conical surface of valve body match form sealed, the surface of case sets up the plane sealing member outside, the plane sealing member of outer case and the sealed alloy -layer in the plane of valve body cooperate form sealed. When the fluid flow need cut through the disk seat, by two sealed secondary seal, can effectively guarantee the sealing reliability. When damaging together, another way can continue work, and simultaneously, preceding way has reduced the pressure differential of back way, also is favorable to the sealed vice life of extension.
Description
Technical field
The utility model relates to the structure of valve, belongs to universal machine field.
Background technique
Stop valve can be widely used in switch, the unrestrained water of the system such as superheater, reheater, main steam, feedwater in thermal power plant, medium temperature is high, pressure is high, discharge pressure reduction is large, thus operating mode is severe, valve sealing face very easily washes away, cavitation erosion, has a strong impact on valve working life and power plants generating electricity efficiency.
Power station stop valve in the past, sealing pair mostly is one, and owing to bearing High Temperature High Pressure High Pressure Difference, sealing surface very easily washes away, and causes seal failure, affects unit efficiency and safe operation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of double-sealed stop valve of long service life.
The purpose of this utility model is achieved in that double-sealed stop valve, comprise valve body, valve rod, filler, Gland and support, one end of valve rod is arranged in valve body, the other end of valve rod stretches out valve body and is connected handwheel with after support by Stem Mut, filler is arranged between valve rod and valve body, support to be nested with on valve rod and to be connected with valve body, and support is threaded hold-down bolt, and Gland is pushed down filler and compressed by hold-down bolt; Built-up welding conical surface seal alloy-layer and plane seal in alloy layer in described valve body; In described valve body, arrange inner spool and outer spool, inner spool to be nested in outer spool and to stretch out outer spool, and outer spool is connected with the threaded stem in valve body and welds, and arranges belleville spring outside in spool, and belleville spring is arranged between inner spool and valve rod; Arrange conical surface seal part at the outer surface of described inner spool, the conical surface seal part of inner spool matches to be formed with the conical surface seal alloy-layer of valve body and seals; Arrange flat seal at the outer surface of described outer spool, the flat seal of outer spool matches to be formed with the plane sealing alloy-layer of valve body and seals.
Valve body of the present utility model and both sides pipeline welding are installed, and valve body and filler form the bearing structure main body of valve; Valve opening and closing element is made up of inner spool and outer spool, and inner spool is conical surface seal, and outside spool is plane sealing, in the middle of the nested and outer spool of inner spool.Outer spool adopts with valve rod and is threaded, and is welded and fixed and ensures non-internal leakage between inner spool and outer spool after connection.Be placed with belleville spring in the middle of inner spool and valve rod, machining error between adjustment inner spool and outer seal spool pair, is fit to valve seat surface while keeping two sealing pairs.
Import and export in the middle part of valve body between runner, built-up welding seal in alloy material, be processed into two sealing surfaces, inside is conical surface form sealing surface, outside is plane form.When fluid flows through valve seat, when needing to block, sealed by two sealing pairs respectively, effectively can ensure sealing reliability like this.When damaging together, another road can work on, and meanwhile, front road reduces the pressure reduction in rear road, is also conducive to extending sealing pair working life.
In order to ensure that valve rod and Stem Mut are synchronized with the movement, valve rod is connected by trapezoidal thread with Stem Mut.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is A portion enlarged view in Fig. 1.
Embodiment
As shown in Figure 1, 2, double-sealed stop valve, comprise valve body 1, valve rod 5, filler 6, Gland 7 and support 10, the lower end of valve rod 5 is arranged in valve body 1, the upper end of valve rod 5 is stretched out valve body 1 and is connected handwheel 11 with after support 10 by Stem Mut 12, and valve rod 5 is connected by trapezoidal thread 9 with Stem Mut 12.Filler 6 is arranged between valve rod 5 and valve body 1, and support 10 to be nested with on valve rod 5 and to be threaded with valve body 1, and be threaded hold-down bolt 8 over the mount 10, and Gland 7 is pushed down filler 6 and compressed by hold-down bolt 8.
Built-up welding conical surface seal alloy-layer 13 and plane seal in alloy layer 14 in valve body 1.In valve body 1, arrange inner spool 2 and outer spool 4, inner spool 2 to be nested in outer spool 4 and to stretch out outer spool 4, and outer spool 4 is threaded with the lower end of valve rod 5 and welds.Arrange belleville spring 3 in spool 4 outside, belleville spring 3 is arranged between inner spool 2 and valve rod 5.Arrange conical surface seal part 15 at the outer surface of inner spool 2, the conical surface seal part 15 of inner spool 2 matches to be formed with the conical surface seal alloy-layer 13 of valve body 1 and seals.The outer surface of spool 4 arranges flat seal 16 outside, and the flat seal 16 of outer spool 4 matches to be formed with the plane sealing alloy-layer 14 of valve body 1 and seals.
Principle illustrates:
Valve pressure part is made up of valve body 1, inner spool 2, outer spool 4, valve rod 5 etc., and filler 6 and Gland 7, hold-down bolt 8 form valve body to external sealed, and when ensureing that valve rod 5 moves up and down, filler place can not leak outside.Support 10 and valve rod 5 and Stem Mut 12, handwheel 11 form the lifting on-off structure of valve.
Turn clockwise handwheel 11, and drive Stem Mut 12 to rotate, valve rod is declined, and inner spool 2 and outer spool 4 are close with valve seat gradually, and valve is tending towards closing; When fluid flows through valve seat, when needing to block, sealed by two sealing pairs respectively, effectively can ensure sealing reliability like this.When damaging together, another road can work on, and meanwhile, front road reduces the pressure reduction in rear road, is also conducive to extending sealing pair working life.
Be rotated counterclockwise handwheel 11 during unlatching, Stem Mut 12 is with ovable valve stem 5 to rise, and drives inner spool 2 and outer spool 4 to rise simultaneously, and valve is tending towards opening.Machined trapezoidal thread between valve rod 5 and Stem Mut 12, make both be synchronized with the movement.
Claims (2)
1. double-sealed stop valve, comprise valve body, valve rod, filler, Gland and support, one end of valve rod is arranged in valve body, the other end of valve rod stretches out valve body and is connected handwheel with after support by Stem Mut, filler is arranged between valve rod and valve body, support to be nested with on valve rod and to be connected with valve body, and support is threaded hold-down bolt, and Gland is pushed down filler and compressed by hold-down bolt; It is characterized in that: built-up welding conical surface seal alloy-layer and plane seal in alloy layer in described valve body; In described valve body, arrange inner spool and outer spool, inner spool to be nested in outer spool and to stretch out outer spool, and outer spool is connected with the threaded stem in valve body and welds, and arranges belleville spring outside in spool, and belleville spring is arranged between inner spool and valve rod; Arrange conical surface seal part at the outer surface of described inner spool, the conical surface seal part of inner spool matches to be formed with the conical surface seal alloy-layer of valve body and seals; Arrange flat seal at the outer surface of described outer spool, the flat seal of outer spool matches to be formed with the plane sealing alloy-layer of valve body and seals.
2. double-sealed stop valve according to claim 1, is characterized in that: described valve rod is connected by trapezoidal thread with Stem Mut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987711.2U CN205173517U (en) | 2015-12-03 | 2015-12-03 | Dual seal stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987711.2U CN205173517U (en) | 2015-12-03 | 2015-12-03 | Dual seal stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205173517U true CN205173517U (en) | 2016-04-20 |
Family
ID=55737511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520987711.2U Active CN205173517U (en) | 2015-12-03 | 2015-12-03 | Dual seal stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205173517U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952961A (en) * | 2016-06-08 | 2016-09-21 | 贾广生 | Gathering and transporting split type control valve |
| CN106090246A (en) * | 2016-08-17 | 2016-11-09 | 江苏海纳机电集团有限公司 | A kind of hand stop valve with sealing compensation |
| CN106499833A (en) * | 2016-11-18 | 2017-03-15 | 扬中市阀门厂有限公司 | A kind of Novel supercritical unit pressure-reducing valve closure member |
| CN110274041A (en) * | 2019-07-22 | 2019-09-24 | 哈尔滨松林电站设备有限公司 | Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve |
-
2015
- 2015-12-03 CN CN201520987711.2U patent/CN205173517U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952961A (en) * | 2016-06-08 | 2016-09-21 | 贾广生 | Gathering and transporting split type control valve |
| CN106090246A (en) * | 2016-08-17 | 2016-11-09 | 江苏海纳机电集团有限公司 | A kind of hand stop valve with sealing compensation |
| CN106499833A (en) * | 2016-11-18 | 2017-03-15 | 扬中市阀门厂有限公司 | A kind of Novel supercritical unit pressure-reducing valve closure member |
| CN110274041A (en) * | 2019-07-22 | 2019-09-24 | 哈尔滨松林电站设备有限公司 | Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |