CN2112730U - Regulating valve for water supply - Google Patents
Regulating valve for water supply Download PDFInfo
- Publication number
- CN2112730U CN2112730U CN 91230855 CN91230855U CN2112730U CN 2112730 U CN2112730 U CN 2112730U CN 91230855 CN91230855 CN 91230855 CN 91230855 U CN91230855 U CN 91230855U CN 2112730 U CN2112730 U CN 2112730U
- Authority
- CN
- China
- Prior art keywords
- valve
- ring
- flow channel
- valve seat
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 10
- 230000001105 regulatory effect Effects 0.000 title description 2
- 238000012856 packing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 210000004907 gland Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
Images
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model relates to a feed-water regulation valve for the load running of a power plant boiler unit, characterized in that a throat ring is provided between a valve seat and a valve body; the throat ring comprises multiple circular-shaped annular orifice plates, and the front face and the back face of the periphery of each throttle plate are provided with flow channel grooves in alternate arrangement. The flow channel groove is provided with multiple flow channel holes and multiple orifice plates in the form of mutual and corresponding overlapping. The flow channel holes are mutually and straightly communicated. The periphery of the valve core thereof is provided with four pressure-drop balance holes for decreasing the pressure difference and the pressure for a valve rod. The whole body decreases the erosion for the valve body, and the service life of the utility model can be increased via multi-stage pressure release.
Description
The utility model belongs to boiler master feedwater or auxiliary feedwater pipeline adjusted water flow field, satisfy a kind of device of boiler of power plant unit needs under various load operations, it is a boiler feed water important step of control automatically, automatically carry out the adjusting of confluent according to signal, with the control boiler drum water level.
General main feed-regulating valve and the auxiliary feed modulating valve of adopting is used in water supply system at present, and feed-regulating valve adopts rise-fall type or rotary type modulating valve, regulate feedwater flow according to changing lifting bar and valve seat gap or changing revolution window cross-sectional sizes, can only a step-down because the erosion of pressure reduction feedwater when giving birth to blowing out, bigger to the erosion of valve junction plane, cause feed-regulating valve seriously to leak, adjust feedwater flow so have to turn down the preceding barrier valve of modulating valve, totally unfavorable to safe operation of the boiler like this, adjust the improper turbine water induction that causes because of feedwater probably, runaway accident takes place.
The purpose of this utility model provides a kind of main feed-regulating valve and auxiliary feed modulating valve of needn't adopting and is used in water supply system, promptly directly use separately, realize repeatedly step-down, move until full load, and reduce pressure reduction to the erosion of valve junction plane with to the pressure of valve rod, increase the feed-regulating valve in working life.
Taked technological scheme by finishing above-mentioned purpose: driving mode is that multi-turn electric actuator has manually and automatic switching control equipment, structural design is a pressure balance type, the step-down seal pressure, adopt fabricated construction in the entire product structural configuration, be convenient to maintenance and change parts, the Flow-rate adjustment that it is characterized in that this modulating valve is realized by the elevating movement change damping restrictor ring Flow area of restrictor ring and plug type spool, and the restrictor ring assembly parts is made up of the restricting orifice of the circular ring-type of polylith, every restricting orifice positive and negative is all around alternately established flow path groove, establish some runners hole in the flow path groove, the polylith restricting orifice is corresponding overlapping mutually, the runner hole is straight-through, on spool, establish simultaneously four pressure balance holes, to reduce pressure reduction and to the pressure of valve rod.
The utility model is embodiment described in detail in conjunction with the accompanying drawings.
Fig. 1 is the circle of restrictor ring assembly parts.Shape ring joint discharge orifice plate structure schematic representation;
Fig. 2 is the structural representation of spool;
Fig. 3 is an overall structure schematic representation of the present utility model.
According to shown in Figure 3, electric actuator 20 is connected with bearing 23 with key 22 by tube nut, carrier setting bolt 19, bearing 23 is connected with support 14 by support bracket bolt 18, intermediate section is provided with key 24, positioning ring 25, butterfly spring 17, lining ring 26, bearing 16 and upper valve rod 15, upper valve rod 15 is connected by contiguous block 10 with lower valve rod 32, fixing by hex head bolt 13, it is fixing by hex head bolt 12 to establish indicator 11 on the contiguous block 10, and direction board 27 on the indicator 11.Above-mentioned support 14 is connected with valve gap 31 by circle nut 9, wherein establishes gland 29, filler wedge 30, gland bolt 28, graphite gasket 8 and liner 7.Above-mentioned valve gap 31 is connected combination by valve gap bolt 5, valve gap packing ring 6, baffle ring 33, seal ring 34 with valve body 36.Feature of the present utility model is fixed by valve seat 2, bolt 38, packing ring 37 by above-mentioned valve body 36 and valve seat 2, establish restrictor ring 3 on the valve seat 2, throttling 3 upper ends are provided with current-sharing cover 4, spool 35 is established in lower valve rod 32 lower ends, and place in valve seat 2 and the throttling associative ring 3, come the water flow of regulation valve body outlet 1 by lower valve rod 32 lifting displacements.Above-mentioned throttling is made of as shown in figures 1 and 3 for cyclization 3 the circular ring-type restricting orifice 42 of polylith, flow path groove 40 is alternately established in every restricting orifice front all around, establish some runners hole 41 in flow path groove 40, polylith restricting orifice 42 is corresponding overlapping mutually, and runner hole 41 is straight-through mutually.And spool 35 as shown in Figures 2 and 3, establishes four pressure balance holes 39 all around.Its purpose can reduce pressure reduction and to valve rod pressure.Therefore totally reduce the valve body erosion, especially increase working life by multistage step-down.
Claims (1)
1, the feed-regulating valve that the boiler of power plant unit is adopted under various load operations, by actuator, support, spool, valve rod, indicator, filler assembly, valve body and valve seat are formed, it is characterized in that valve seat and valve body 36 are by bolt 38, packing ring 37 is fixing, establish restrictor ring 3 on the valve seat 2, throttling 3 upper ends are provided with current-sharing cover A, lower valve rod 32 lower ends, if spool 35, and place in valve seat and the throttling associative ring 3, do the lifting displacement by lower valve rod 32, a. restrictor ring 3 is made up of the circular ring-type restricting orifice 42 of polylith, every restricting orifice 42 positive and negative is all around alternately established flow path groove 40, some runners hole 41 in flow path groove 40, polylith restricting orifice 42 is corresponding overlapping mutually, and runner hole 41 is straight-through mutually; B. establish four pressure balance holes 39 around the spool 35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230855 CN2112730U (en) | 1991-10-30 | 1991-10-30 | Regulating valve for water supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230855 CN2112730U (en) | 1991-10-30 | 1991-10-30 | Regulating valve for water supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2112730U true CN2112730U (en) | 1992-08-12 |
Family
ID=4936138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91230855 Granted CN2112730U (en) | 1991-10-30 | 1991-10-30 | Regulating valve for water supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2112730U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423505A (en) * | 2012-05-16 | 2013-12-04 | 江南阀门有限公司 | HV fast changeover valve |
| CN107676496A (en) * | 2017-11-08 | 2018-02-09 | 江苏国泉泵业制造有限公司 | A kind of anti-residual sleeve adjusting valve of high temperature |
-
1991
- 1991-10-30 CN CN 91230855 patent/CN2112730U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423505A (en) * | 2012-05-16 | 2013-12-04 | 江南阀门有限公司 | HV fast changeover valve |
| CN103423505B (en) * | 2012-05-16 | 2016-03-23 | 江南阀门有限公司 | HV rapid switching valve |
| CN107676496A (en) * | 2017-11-08 | 2018-02-09 | 江苏国泉泵业制造有限公司 | A kind of anti-residual sleeve adjusting valve of high temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |