CN102207201B - Displacement compensation device of seal ring of ultra supercritical machine set control valve - Google Patents
Displacement compensation device of seal ring of ultra supercritical machine set control valve Download PDFInfo
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- CN102207201B CN102207201B CN 201110149455 CN201110149455A CN102207201B CN 102207201 B CN102207201 B CN 102207201B CN 201110149455 CN201110149455 CN 201110149455 CN 201110149455 A CN201110149455 A CN 201110149455A CN 102207201 B CN102207201 B CN 102207201B
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- control valve
- ultra supercritical
- compensation device
- seal ring
- displacement compensation
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Abstract
The invention relates to a displacement compensation device of a seal ring of an ultra supercritical machine set control valve for an ultra supercritical machine set control valve. The displacement compensation device comprises an elastic piece; the ultra supercritical machine set control valve comprises a valve body, a guide seat and a flow guide seat, wherein the guide seat is installed on the valve body; the flow guide seat is installed on the valve body; the flow guide seat is adjacent to the guide seat and is provided with a groove; the elastic piece is installed and contained in the groove; and the relative end of the elastic piece respectively props against the flow guide seat and the guide seat. The elastic force is utilized to balance the deformation of flexible graphite for the displacement compensation device of the seal ring of the ultra supercritical machine set control valve provided by the invention, the damage to the guide seat caused by the moving around in the valve body by the guide seat is avoided, and the displacement compensation device can play a role of sealing better.
Description
Technical field
The present invention relates to a kind of displacement compensation device of seal ring of the control valve that is applied to the ultra supercritical unit in the thermal power generation.
Background technique
In order to improve generating efficiency, the ultra supercritical unit is often adopted in the thermal power plant, namely is that the parameter of fossil-fired unit is set to supercritical parameter or ultra supercritical parameter.The ultra supercritical unit need to be worked under 620 ℃, the condition of 32MPa, and is therefore all very high to performance and the seal request of ultra supercritical unit.Pass through flexible graphite sealing between the cavity of the control valve of existing ultra supercritical unit and the guide holder.When the displacement compensation device of the seal ring that uses this ultra supercritical unit control valve, combustion gas promotes guide holder mobile and extruding Expanded graphite in cavity.Yet when the pressure that does not have combustion gas or combustion gas in this cavity reduced, the elastic force of Expanded graphite forced guide holder oppositely mobile.Thus one, guide holder moves around in cavity, the long-term use, and this guide holder that can damage, wear and tear, thus affect sealing effect.
Summary of the invention
In view of above problem, the present invention aims to provide and a kind ofly can prevent that guide holder from moving around in cavity, and the displacement compensation device of the seal ring of the control valve of the ultra supercritical unit of good sealing effect.
To achieve these goals, the invention provides a kind of displacement compensation device of seal ring of ultra supercritical unit control valve, be applied to a ultra supercritical unit control valve, ultra supercritical unit control valve comprises valve body, be installed on the guide holder of valve body and be installed on the distributary base of valve body, distributary base is in abutting connection with guide holder, distributary base is provided with groove, and the displacement compensation device of the seal ring of ultra supercritical unit control valve comprises an elastic component; Elastic component is installed and to be contained in groove, and the opposite end of elastic component respectively elasticity support distributary base and guide holder.
Further, elastic component is one or more spring.
Further, guide holder is extended with the gear pin, and the gear pin inserts groove.
Further, the gear pin is against the sidewall of groove, to block the side of elastic component.
Compare prior art, the displacement compensation device of the seal ring of ultra supercritical unit control valve of the present invention utilizes the elastic force of the elastic force balancing flexible graphite of elastic component, the damage of having avoided guide holder to move around in valve body guide holder is caused can better be played seal action.
Description of drawings
The Figure of description that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the part cross-sectional schematic that is applied to control valve according to the displacement compensation device of the seal ring of ultra supercritical unit control valve of the present invention; And
Fig. 2 is the enlarged view at circle II place among Fig. 1.
Embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Please refer to Fig. 1, the better embodiment of the displacement compensation device of the seal ring of ultra supercritical unit control valve of the present invention is applied to a ultra supercritical unit control valve 1.
The displacement compensation device of the seal ring of ultra supercritical unit control valve comprises an elastic component 38.In the present embodiment, this elastic component 38 is preferably a spring or a plurality of spring uses side by side.
This ultra supercritical unit control valve 1 comprises a driving mechanism 10, spool 20, be connected in the valve body 30 of driving mechanism 10, be fixed in the guide holder 40 of valve body 30 and be fixed in the valve pocket 50 of valve seat 30.
The first end extension of spool 20 is provided with a cross section and is parabolic plug 22.Spool 20 outwards is convexly equipped with a back-up ring 24 near the peripheral region of plug 22.Back-up ring 24 and plug 22 mutual butts.
The underpart of cavity 31 is fixed with a distributary base 36 cylindraceous, and the sidewall of distributary base 36 is equipped with some through holes 362, and the sidewall of distributary base 36 blocks import 32, and through hole 362 is communicated with import 32.Please in conjunction with reference Fig. 2, the upper end of the sidewall of this distributary base 36 is provided with groove 364.Elastic component 38 is arranged at groove 364.
The lower end extension of guide holder 40 is provided with gear pin 42.Guide holder 40 is sheathed on spool 20, and the peripheral region of spool 20 is arranged with a fixed cover 26.Fixing by a fastening piece 28 between guide holder 40 and the fixed cover 26.This fastening piece 28 can be bolt, screw or other fixed block.The second end that spool 20 is relative with first end is fixedly connected on driving mechanism 10.Guide holder 40 slides through valve pocket 50, and the upper-end surface of distributary base 36 is kept out in the lower end of guide holder 40.At this moment, this gear pin 42 inserts respectively the groove 364 of distributary base 36, and against the sidewall of groove 364, to block the side of elastic component 38, prevents elastic component 38 skews.Guide holder 40 and distributary base 36 are supported in the opposite end of elastic component 38 respectively elasticity.The second end of spool 20 is contained in cavity 31, and the plug 22 of spool 20 block the outlet 34, the back-up ring 24 of spool 20 blocks the partial through holes 362 of the bottom of distributary base 36.Under the driving of driving mechanism 10, spool 20 can move up and down along guide holder 40 in cavity 31, opens or closes outlet 34 to drive plug 22, thus conducting or close the displacement compensation device of the seal ring of ultra supercritical unit control valve of the present invention.
In addition, guide holder 40 is provided with a seal ring 43 between the position of valve pocket 50 belows and valve body 30, with cavity 31 sealings, prevents Leakage Gas.In the present embodiment, sealing circle 43 is preferably pendant collet.Space-filling between the lower end of sealing circle 43 and guide holder 40 has Expanded graphite 44, the movement in cavity 31 with further sealing and buffering guide holder 40.Seal ring 43 is respectively in abutting connection with lower end and the Expanded graphite 44 of valve pocket 50.
When the displacement compensation device of the seal ring that uses this ultra supercritical unit control valve of conducting, combustion gas enters by import 32, and enters cavity 31 by the through hole 362 of distributary base 36, flows out by outlet 34 again.In this process, the gas in the cavity 31 can make guide holder 40 move to cavity 31 tops, and Expanded graphite 44 produces resiliently deformable.When not having gas in the cavity 31, the elastic force of Expanded graphite 44 forces guide holder 40 to move to cavity 31 bottoms, and the elastic force of elastic component 38 forces guide holder 40 to move to cavity 31 tops.Like this, the mutual balance of distortion of the elastic force of elastic component 38 and Expanded graphite 44, damage, the wearing and tearing of having avoided guide holder 40 to move around in cavity 31 guide holder 40 is caused can be played seal action better.
In other embodiments, guide holder 40 also can not established gear pin 42, and directly makes elastic component 38 be contained in groove 364, and the sidewall that makes groove 364 is against elastic component 38.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the displacement compensation device of the seal ring of a ultra supercritical unit control valve, be applied to a ultra supercritical unit control valve, described ultra supercritical unit control valve comprises valve body, be installed on the guide holder of described valve body and be installed on the distributary base of described valve body, described distributary base is in abutting connection with described guide holder, described distributary base is provided with groove, it is characterized in that:
The displacement compensation device of the seal ring of described ultra supercritical unit control valve comprises elastic component;
Described elastic component is installed and is contained in described groove, and the opposite end of described elastic component respectively elasticity support described distributary base and described guide holder.
2. the displacement compensation device of the seal ring of ultra supercritical unit control valve according to claim 1, it is characterized in that: described elastic component is one or more spring.
3. the displacement compensation device of the seal ring of ultra supercritical unit control valve according to claim 2, it is characterized in that: described guide holder is extended with the gear pin, and described gear pin inserts described groove.
4. the displacement compensation device of the seal ring of ultra supercritical unit control valve according to claim 3, it is characterized in that: described gear pin is against the sidewall of described groove, to block the side of described elastic component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110149455 CN102207201B (en) | 2011-06-03 | 2011-06-03 | Displacement compensation device of seal ring of ultra supercritical machine set control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110149455 CN102207201B (en) | 2011-06-03 | 2011-06-03 | Displacement compensation device of seal ring of ultra supercritical machine set control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102207201A CN102207201A (en) | 2011-10-05 |
| CN102207201B true CN102207201B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110149455 Active CN102207201B (en) | 2011-06-03 | 2011-06-03 | Displacement compensation device of seal ring of ultra supercritical machine set control valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533597A (en) * | 1938-11-02 | 1941-02-17 | Kidde & Co Walter | Improvement in control valves for high pressure containers |
| US3506242A (en) * | 1967-09-11 | 1970-04-14 | Fisher Governor Co | Valve with compressible seal means |
| CN2809355Y (en) * | 2005-04-29 | 2006-08-23 | 张耀辉 | Concealed pedal controller |
| CN101187428A (en) * | 2006-11-16 | 2008-05-28 | 鞍山电磁阀有限责任公司 | Intelligent sleeve type high temperature high voltage solenoid valve |
| CN201368205Y (en) * | 2009-03-26 | 2009-12-23 | 福建天广消防科技股份有限公司 | Electric-control air storage bottle head valve |
| CN202132521U (en) * | 2011-06-03 | 2012-02-01 | 株洲南方阀门股份有限公司 | Displacement compensator for sealing ring of ultra supercritical unit control valve |
-
2011
- 2011-06-03 CN CN 201110149455 patent/CN102207201B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533597A (en) * | 1938-11-02 | 1941-02-17 | Kidde & Co Walter | Improvement in control valves for high pressure containers |
| US3506242A (en) * | 1967-09-11 | 1970-04-14 | Fisher Governor Co | Valve with compressible seal means |
| CN2809355Y (en) * | 2005-04-29 | 2006-08-23 | 张耀辉 | Concealed pedal controller |
| CN101187428A (en) * | 2006-11-16 | 2008-05-28 | 鞍山电磁阀有限责任公司 | Intelligent sleeve type high temperature high voltage solenoid valve |
| CN201368205Y (en) * | 2009-03-26 | 2009-12-23 | 福建天广消防科技股份有限公司 | Electric-control air storage bottle head valve |
| CN202132521U (en) * | 2011-06-03 | 2012-02-01 | 株洲南方阀门股份有限公司 | Displacement compensator for sealing ring of ultra supercritical unit control valve |
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| Publication number | Publication date |
|---|---|
| CN102207201A (en) | 2011-10-05 |
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