CN202469108U - Hole plate assembly type micro amount water spray regulating valve - Google Patents
Hole plate assembly type micro amount water spray regulating valve Download PDFInfo
- Publication number
- CN202469108U CN202469108U CN2011205303411U CN201120530341U CN202469108U CN 202469108 U CN202469108 U CN 202469108U CN 2011205303411 U CN2011205303411 U CN 2011205303411U CN 201120530341 U CN201120530341 U CN 201120530341U CN 202469108 U CN202469108 U CN 202469108U
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- China
- Prior art keywords
- valve
- plate assembly
- hole plate
- orifice plate
- valve body
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- 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 - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000007921 spray Substances 0.000 title abstract description 3
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 238000005491 wire drawing Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to a hole plate assembly type micro amount water spray regulating valve, which comprises a valve body, a valve rod and a valve core and has the innovation points that a valve seat is arranged at the bottom of a middle cavity of the valve body, the lower part of the valve rod extends into the middle cavity of the valve body, the lower end of the valve rod is provided with the valve core capable of being matched with the valve seat for realizing the break-make state of upstream and downstream flow passages of the valve body, a hole plate assembly and a flow equalizing cover are arranged on the valve seat, the hole plate assembly is in a hollow cylindrical shape, the inner wall of the hole plate assembly is provided with a plurality of flow passages communicated with the upper end surface of the hole plate assembly, the flow equalizing cover is in a hollow cylindrical shape, and the lower part of the flow equalizing cover is provided with a plurality of square flow equalizing holes. Under the condition that the valve core lift is low, fluid media enter the flow passages of the hole plate assembly, the speed of the media flowing out of the hole plate assembly is limited through the resistance of the flow passages, and the media enter the flow equalizing holes of the flow equalizing cover through the follow passages and enter the downstream flow passages through flowing outwards from the flow equalizing holes. The valve has the variable resistance characteristic, the wire drawing and gas erosion damage phenomena possibly caused when high pressure drop directly acts on the sealing surface of the valve seat can also be avoided, and the operation reliability of the valve is improved.
Description
Technical field
The utility model relates to a kind of valve, and particularly a kind of boiler main steam and reheated steam are used water jet control valve.
Background technique
The trace water jet control valve is mainly used in the flow of control boiler main steam and the required cooling water of reheat steam temperature; Be to be used for one of temperature controlled critical component of accurate steam regulation; Regulate good vapor (steam) temperature control and can throttle temperature be remained on set point, thereby guaranteed the efficient operation of steam turbine.Because the inlet outlet pressure differential of desuperheat water jet control valve is big in main steam system; Desuperheat water jet control valve for ordinary construction can produce serious cavitation phenomenon; Cavitation erosion is very big to the collapsing force of spool, valve seat, in case generation, two or three months at most; At least one or two week, sealing surface of seat promptly suffers badly damaged.Make leakage rate reach specified more than 30%, regulate and promptly lose closing function, influence unit and normally move.Secondly, modulating valve is under the transformation operating mode and works in the system, and serious distortion takes place the valve inherent flow characteristic, and during valve opening 40%, it is maximum that flow promptly reaches, and can not carry out whole process and control sometimes.
Summary of the invention
The technical problem that the utility model will solve provides a kind of long service life, the accurate orifice-plate type trace of control characteristic water jet control valve.
For solving the problems of the technologies described above; The technological scheme of the utility model is: a kind of orifice plate groupware type trace water jet control valve; Comprise valve body, valve rod and spool; Its innovative point is: said valve body lumen bottom is equipped with valve seat, and the bottom of said valve rod is stretched in the valve body lumen, and the lower end of valve rod is provided with and can cooperates the spool of realizing valve body upstream and downstream runner break-make with valve seat; Install successively from bottom to top on the said valve seat orifice plate assembly and current-sharing cover are installed successively; Said orifice plate assembly is a hollow cylinder; The inwall of orifice plate assembly is evenly distributed with some from bottom to top and the runner upper-end surface conducting of orifice plate assembly successively; Said current-sharing cover is a hollow cylinder, and the lower circumference direction of said current-sharing cover is evenly distributed with some square equal discharge orifices, and the bottom of said square equal discharge orifice is communicated with runner.
Further, be evenly distributed with several restrictor rings from top to bottom on the circumference of the sealing surface of said spool below.
The advantage of the utility model is: under the low situation of spool lift; Flowing medium gets into the aperture of orifice plate; The axial flow of the resistance of aperture and " wave " makes the speed of medium outflow orifice be restricted; Equal discharge orifice through aperture entering current-sharing cover outwards flows into downstream canal by equal discharge orifice.Through the continuous step-down of orifice plate, current-sharing cover, pressure maintains on the atmospheric pressure all the time, thus the destruction of avoiding cavitation phenomenon to cause, in this process, pressure drop is big, and flow curve changes.Along with the lift of spool uprises, flowing medium directly flows to downstream canal from the current-sharing cover, can satisfy the requirement of low pressure loss, big flow again.Make valve both have the resistance of change characteristic like this, avoided high pressure drop to directly act on the phenomenon that possibly cause wire drawing and cavitation erosion on the sealing surface of seat again, improved the operational reliability of valve.Applicable to main feed-regulating valve, the feed water by-pass modulating valve in thermal power plant, the adjustable diameter and screw adjusting valve that feeds water again, high pressure turbine by water jet control valve, low voltage bypass water jet control valve, reheater emergency spray modulating valve, reheater trace water jet control valve, superheater I and II water jet control valve, intermediate pressure cylinder extraction control valve, low pressure (LP) cylinder extraction control valve, soot blower steam decompression valve and continuous blowdown valve etc., using scope is wide.
Valve rod and spool are integrated type, are provided with the more piece throttling arrangement in stem bottom, both can reduce medium to the washing away of spool and valve body sealing surface, and can reduce flow again.
Description of drawings
Fig. 1 is the utility model orifice plate groupware type trace water jet control valve structural representation.
Fig. 2 is the utility model aperture plate assembly, current-sharing cover and valve core structure schematic representation.
Embodiment
Like Fig. 1, shown in 2, comprise valve body 1, metallic shim 2, valve seat 3, orifice plate assembly 4, valve rod 5, current-sharing cover 6, metallic shim 7, valve gap 8.
The top of above-mentioned valve body 1 is equipped with valve gap 8, is provided with metallic shim 7 between valve gap 8 and the valve body 1, and valve body 1 lumen bottom is equipped with valve seat 3, between valve seat 3 and valve body 1 lumen bottom stage face, is provided with metallic shim 2.
Orifice plate assembly 4 and current-sharing cover 6 are installed on the valve seat 3 from bottom to top successively; The concrete structure of orifice plate assembly is: it is piled up by some annular oriffices and is welded into a hollow cylinder; Orifice plate upper-end surface and lower end surface are established the fan groove that extends to the orifice plate inwall respectively; The aperture that is communicated with the lower end surface is established in fan groove bottom surface, upper-end surface, and the aperture that is communicated with the upper-end surface is established in fan groove bottom surface, lower end surface; After orifice plate piled up, the fan groove of lower floor orifice plate lower end surface was communicated with the fan groove of orifice plate lower end surface, upper strata through aperture; The fan groove of lower floor orifice plate upper-end surface is communicated with the fan groove of orifice plate upper-end surface, upper strata through aperture.Inwall at this orifice plate assembly is evenly distributed with some from bottom to top and the runners 4 upper-end surface conductings of orifice plate assembly successively like this.
Current-sharing cover 6 is a hollow cylinder, and the lower circumference direction of current-sharing cover 6 is evenly distributed with some square equal discharge orifices, and the bottom of square equal discharge orifice is communicated with runner.
Valve rod 5 bottoms are passed valve gap 8 centers and are stretched into valve body 1 lumen; The lower end of valve rod 5 is provided with and can cooperates the spool of realizing valve body 1 upstream and downstream runner break-make with valve seat 3; This spool and valve rod 5 global formations are evenly distributed with several restrictor rings from top to bottom on circumference below the sealing surface of spool.
Claims (2)
1. orifice plate groupware type trace water jet control valve; Comprise valve body, valve rod and spool; It is characterized in that: said valve body lumen bottom is equipped with valve seat, and the bottom of said valve rod is stretched in the valve body lumen, and the lower end of valve rod is provided with and can cooperates the spool of realizing valve body upstream and downstream runner break-make with valve seat; Orifice plate assembly and current-sharing cover are installed on the said valve seat from bottom to top successively; Said orifice plate assembly is a hollow cylinder; The inwall of orifice plate assembly is evenly distributed with some from bottom to top and the runner upper-end surface conducting of orifice plate assembly successively; Said current-sharing cover is a hollow cylinder, and the lower circumference direction of said current-sharing cover is evenly distributed with some square equal discharge orifices, and the bottom of said square equal discharge orifice is communicated with runner.
2. orifice plate groupware type trace water jet control valve according to claim 1 is characterized in that: be evenly distributed with several restrictor rings from top to bottom on the sealing surface below circumference of said spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205303411U CN202469108U (en) | 2011-12-19 | 2011-12-19 | Hole plate assembly type micro amount water spray regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205303411U CN202469108U (en) | 2011-12-19 | 2011-12-19 | Hole plate assembly type micro amount water spray regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202469108U true CN202469108U (en) | 2012-10-03 |
Family
ID=46917267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205303411U Expired - Fee Related CN202469108U (en) | 2011-12-19 | 2011-12-19 | Hole plate assembly type micro amount water spray regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202469108U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937201A (en) * | 2012-11-22 | 2013-02-20 | 南通市力沛流体阀业有限公司 | Air-toward steam exhausting valve |
| CN103062464A (en) * | 2013-01-28 | 2013-04-24 | 饶杰 | Spool component resistant to cavitation erosion and erosion wear for regulating valve |
| CN103591352A (en) * | 2013-11-20 | 2014-02-19 | 南通龙源电站阀门有限公司 | Novel small flow desuperheating water adjusting valve |
| CN105422932A (en) * | 2015-11-23 | 2016-03-23 | 浙江大学 | Designing method for pressure reducing structure of high-parameter multi-stage pressure reducing valve with pore plates |
-
2011
- 2011-12-19 CN CN2011205303411U patent/CN202469108U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937201A (en) * | 2012-11-22 | 2013-02-20 | 南通市力沛流体阀业有限公司 | Air-toward steam exhausting valve |
| CN103062464A (en) * | 2013-01-28 | 2013-04-24 | 饶杰 | Spool component resistant to cavitation erosion and erosion wear for regulating valve |
| CN103591352A (en) * | 2013-11-20 | 2014-02-19 | 南通龙源电站阀门有限公司 | Novel small flow desuperheating water adjusting valve |
| CN105422932A (en) * | 2015-11-23 | 2016-03-23 | 浙江大学 | Designing method for pressure reducing structure of high-parameter multi-stage pressure reducing valve with pore plates |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20171219 |