CN103742693B - High-pressure-difference adjusting valve structure - Google Patents
High-pressure-difference adjusting valve structure Download PDFInfo
- Publication number
- CN103742693B CN103742693B CN201410033165.9A CN201410033165A CN103742693B CN 103742693 B CN103742693 B CN 103742693B CN 201410033165 A CN201410033165 A CN 201410033165A CN 103742693 B CN103742693 B CN 103742693B
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- China
- Prior art keywords
- valve
- valve seat
- assembly
- valve body
- seat
- 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 - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a high-pressure-difference adjusting valve structure. According to the technical scheme, a multistage throttling component is disposed below a valve seat, the main part of a valve element component and the seal face on the main part are located above the valve seat, the lower end of the seal face of the valve element component extends downwards to form a cylindrical throttling sleeve, the upper end of the throttling sleeve is provided with a plurality of through-flow windows, the upper cavity of a valve body is communicated with the medium inlet end of a valve, and the lower cavity of the valve body is communicated with the medium outlet of the valve. In addition, a seal ring for sealing and isolating the upper cavity and the lower cavity of the valve body is mounted on the excircle of the valve seat. The valve seat and the multistage throttling component below the valve seat are compressed by pressing the parts on the upper side of the valve seat. By the structure, valve seal reliability can be guaranteed while seal face erosion and cavitation during small openness can be relieved or eliminated.
Description
Technical field
The present invention relates to a kind of valve mechanism is and in particular to a kind of structure of high-differential-pressure regulating valve.
Background technology
High-differential-pressure regulating valve is important valve and critical valves in the unit and system of the industries such as power station, petrochemical industry, such as fire
The minimum flow valve (feedwater recirculation regulating valve) of power feed water supply system of power plant, its turnover when using on super (super-) critical unit
The maximum differential pressure at mouthful end is up to 40MPa, and is necessary to ensure that in valve closing and reaches zero leakage, and working condition requirement is extremely harsh.
Additionally, in the industries such as petrochemical industry, the Coal Chemical Industry also supporting high-differential-pressure regulating valve being provided with some and there is harsh use requirement.State at present
The high-differential-pressure regulating valve of this kind of harshness operating mode installed and used on interior unit and equipment also relies on import substantially.With domestic manufacturer
Product is compared, and the high-differential-pressure regulating valve of import has more stable reliable serviceability and relatively long service life,
But the restriction due to product structure design aspect, imported product there is also some shortcomings when using, such as minimum flow valve, at present
Domestic main imported product is the product of U.S. CCI and Copes-Vulcan company, the labyrinth minimum flow valve of CCI in order to
The sealing property improving valve, using the design of stream pass type, causes valve sealing surface when small guide vane runs can be subject to more serious
Wash away it has to the service requirement of valve is arranged to arrive at quick closedown during 10% aperture, and Copes Vulcan company
Minimum flow valve product, in order to overcome this defect, using stream open form design although product can run in small guide vane, but
Because valve pressure is high, the design flowing open form during closing is highly detrimental to the sealing of valve.
Reflect the valve seat of domestic and international high-differential-pressure regulating valve product, valve element, throttling element (sleeve assembly) at present as shown in Figure 1
Basic position relationship between three, valve element and throttling element (sleeve assembly) are respectively positioned on the top of valve seat.When valve is that stream closes
When type is the design of upper entering and lower leaving, medium is from throttling element (sleeve assembly) lateral intermediate flow outward, medium pressure during valve closing
Power acts on the sealability being greatly improved valve above valve element, but valve is when small guide vane runs, due to now pressure reduction
High and medium volumetric expansion flow velocity after decompression increases, and the sealing surface of valve seat and valve element can be subject to more serious washing away or even gas
Erosion destroys；When valve is using the design that stream open form is bottom in and top out, medium is middle laterally from throttling element (sleeve assembly)
Flowing, when small guide vane runs the sealing surface of valve seat and valve element by medium wash away with the probability of cavitation erosion to be significantly smaller than aforementioned
Stream pass type structure, but during valve closing, high-pressure medium acts on below valve element, and medium can be unfavorable for the upper top power of valve element very much
Valve realizes reliable sealing.The valve seat existing high-differential-pressure regulating valve taken, valve element, throttling element (sleeve assembly)
Combination form for, no matter flow to and how to select it is ensured that the sealing reliability of valve and the rushing of sealing surface when reducing small guide vane
Brush cavitation erosion is all conflict it is impossible to take into account both simultaneously, can only the two take first, and both usability to valve
Should say it is all critically important for energy.Therefore, in order to improve serviceability and the use of high-differential-pressure regulating valve product
In the life-span, need to set up a kind of new in terms of the valve seat of high-differential-pressure regulating valve, valve element, the combination form of throttling element (sleeve assembly)
Structure and pattern.
Content of the invention
In order to overcome, existing high-differential-pressure regulating valve product is existing in structure design above-mentioned can not to be ensured to produce simultaneously
The sealing property of product and the weak point ensureing product reliably working in small guide vane, the invention provides a kind of new High Pressure Difference
The structure of regulating valve.
To achieve these goals, the present invention employs the following technical solutions：
A kind of structure of new high-differential-pressure regulating valve, it includes valve body, multi-level throttle assembly, valve seat, valve element or valve element group
Part, has sealing surface on valve element or core assembly and valve seat respectively and matches in valve closing, and its major technique is crucial
It is：Valve seat is located in the middle of epicoele and the cavity of resorption of valve body, multi-level throttle assembly is arranged on the lower section of valve seat, valve element or valve element group
The main part of part and sealing surface thereon are positioned at the top of valve seat；Valve element or core assembly main part from sealing surface
Lower end is down extended with the throttle sleeve of cylindrical shape, and the middle endoporus of the cylindrical and multi-level throttle assembly of throttle sleeve matches and merges
Can move up and down wherein, the upper end of throttle sleeve has multiple through-flow windows；The epicoele of valve body and the medium inlet of valve
End connection, the cavity of resorption of valve body is connected with the media outlet end of valve.
Above-mentioned orifice union refers to porous restriction sleeve or the multistage porous restriction set that high-differential-pressure regulating valve is generally adopted
Cylinder, labyrinth throttling disc group, multi-layer porous throttling disc combination and other throttling with the preferable reduction of speed ability that reduces pressure
Structure；Valve element or core assembly both can be single valve elements or by for realizing certain functional requirement such as pilot-operated type
Valve element, some parts that are multi-sealed etc. and arranging are formed.
In order to more simply, easily realize above-mentioned technical scheme proposed by the invention, under in addition the present invention also adds
Two technical schemes stated：
It is installed between valve seat and valve body with sealing ring at the cylindrical position of valve seat, enter between the epicoele to valve body and cavity of resorption
Row sealing cut-off.
Compressed by the other parts being arranged on the upside of the compressing structure top pressure valve seat of body cavity upper end simultaneously and consolidate
Determine valve seat and the multi-level throttle assembly on the downside of it.
The invention has the beneficial effects as follows：Using the structural shape of high-differential-pressure regulating valve proposed by the invention, can be simultaneously
Ensure the sealing reliability of valve and the washing away of during small guide vane sealing surface, cavitation erosion are mitigated or eliminated.
Brief description
Fig. 1 is the valve seat of existing high-differential-pressure regulating valve product, valve element, the signal of the combination form of throttling element (sleeve assembly)
Figure.
Fig. 2 is the structural representation of a concrete application of the structural shape of high-differential-pressure regulating valve provided by the present invention.
In figure, 1, valve body；2nd, multi-level throttle assembly；3rd, sealing ring；4th, valve seat；5th, valve element or core assembly；
5-1, throttle sleeve；5-2, through-flow window.
Specific embodiment
With reference to the accompanying drawings and examples technical scheme is further elaborated.
As shown in Fig. 2 being the structural shape of high-differential-pressure regulating valve proposed by the invention in heat power station water supply system
The structural representation of one concrete application of valve aspect.This structure include valve body (1), multi-level throttle assembly (2), valve seat (4),
The part such as valve element or core assembly (5), has respectively through built-up welding and processing on valve element or core assembly (5) and valve seat (4)
Cobalt-based sealing surface and match in valve closing.The major technique of this structure it is critical only that：Valve seat (4) is located at valve body (1)
Epicoele and cavity of resorption in the middle of, multi-level throttle assembly (2) be arranged on valve seat (4) lower section, valve element or core assembly (5) main part
Divide and sealing surface thereon is positioned at the top of valve seat (4)；Valve element or core assembly (5) main part from sealing surface lower end
Down it is extended with the throttle sleeve (5-1) of cylindrical shape, in the centre of cylindrical and multi-level throttle assembly (2) of throttle sleeve (5-1)
Hole matches that merging to move up and down wherein and to change the outflow area of medium to adjust flow, throttle sleeve (5-1) upper
End has multiple through-flow windows (5-2)；The epicoele of valve body (1) is connected with the medium inlet end of valve, the cavity of resorption of valve body (1) and valve
The media outlet end connection of door.
Aforesaid multi-level throttle assembly (2) uses the labyrinth with excellent throttling reduction of speed performance in the present embodiment
Throttling disc group,
And aforesaid valve element or core assembly (5) be designed as in the present embodiment dual with pilot-operated type small valve core and soft or hard
The composite construction of sealing surface, the core assembly being made up of some part combination；Valve run when, core assembly open, medium by
Through-flow window (5-2) on the throttle sleeve (5-1) through core assembly lower end for the epicoele of valve body (1) and throttle sleeve (5-1)
Endoporus is circulated to the inner chamber of labyrinth throttling disc group, drives the throttle sleeve of core assembly lower end by the drive mechanism of valve
(5-1) move up and down and be adjusted, make a certain amount of medium flow out to valve body from labyrinth throttling disc group inner chamber through labyrinth channel
(1) cavity of resorption and valve export.
In the structural shape of existing high-differential-pressure regulating valve, the sealing property of valve to be fully ensured that, need to make medium by
The direction flowing of upper entering and lower leaving, and medium is when flowing to and necessarily inside from the outside of multi-level throttle assembly by upper entering and lower leaving
Flowing, leads to valve to be unable to reliably working in small guide vane.The essence of the present invention is exactly the multistage section in existing structure pattern
The position of stream assembly is replaced into lower section positioned at valve seat by the top positioned at valve seat, so flows to as upper entering and lower leaving ensureing medium
On the premise of, flow direction when by multi-level throttle assembly for the medium is changed into from inside to outside, thus ensure that valve is opened little
Can normally and reliably work when spending.New structure not only makes the sealing surface of valve seat and core assembly in small guide vane and normal
The restriction being no longer at multi-level throttle assembly during aperture is nearby so as to enable sealing surface to keep good and lasting sealing
Power, and flow through throttle sleeve top and enter the medium that the medium of multi-level throttle assembly is also without blood pressure lowering, without worry
The top throttleng surface of throttle sleeve can be washed away and cavitation erosion.
In order to relatively simply realize structure proposed by the invention, convenient for assembly and maintenance, the present embodiment is above-mentioned basic
In addition following two technical scheme is also taken on the basis of structure：
It is installed between valve seat (4) and valve body (1) with sealing ring (3) at the cylindrical position of valve seat (4), to valve body (1)
Carry out sealing cut-off between epicoele and cavity of resorption.Sealing ring (3) adopts resistant to elevated temperatures fluorubber 0 type circle.
By be arranged on part on the upside of compressing structure top pressure valve seat (4) at the pendant collet of valve body (1) inner chamber upper end Lai with
When compression and fixed valve base (4) and the multi-level throttle assembly (2) on the downside of it, enable valve under High Pressure Difference operating mode reliability work
Make.
Above in association with accompanying drawing, the specific embodiment of the present invention is described, but these explanations can not be understood to limit
The scope of the present invention.Those skilled in the art should know, the present invention is not restricted to the described embodiments, its protection
Scope is defined by appending claims, any various in the range of being defined without departing from claims of the present invention
The technical scheme that change, modification are formed, all spirit without departing from the present invention and technical spirit, still can belong to the present invention
Within right.
Claims (3)
1. a kind of structure of high-differential-pressure regulating valve, it includes valve body (1), multi-level throttle assembly (2), valve seat (4), valve element or valve element
Assembly (5), has sealing surface on valve element or core assembly (5) and valve seat (4) respectively and matches in valve closing, and it is special
Levy and be：Valve seat (4) is multi-level throttle assembly (2), valve in the middle of the epicoele and cavity of resorption of valve body (1), in the lower section of valve seat (4)
The main part of core or core assembly (5) and sealing surface thereon are positioned at the top of valve seat (4)；In valve element or core assembly
(5) main part from sealing surface lower end be down extended with cylindrical shape throttle sleeve (5-1), throttle sleeve (5-1) cylindrical
Match with the middle endoporus of multi-level throttle assembly (2) and merge and can move up and down wherein, the upper end of throttle sleeve (5-1) has
Multiple through-flow windows (5 2)；The epicoele of valve body (1) is connected with the medium inlet end of valve, the cavity of resorption of valve body (1) and valve
Media outlet end connects.
2. high-differential-pressure regulating valve according to claim 1 structure it is characterised in that：The cylindrical position of valve seat (4) with
Sealing ring (3) is installed between valve seat (4) and valve body (1), carries out sealing cut-off between the epicoele to valve body (1) and cavity of resorption.
3. high-differential-pressure regulating valve according to claim 1 structure it is characterised in that：By being arranged on valve body (1) inner chamber
Other parts on the upside of compressing structure top pressure valve seat (4) of upper end to compress and fixed valve base (4) and multistage on the downside of it simultaneously
Orifice union (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410033165.9A CN103742693B (en) | 2014-01-23 | 2014-01-23 | High-pressure-difference adjusting valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410033165.9A CN103742693B (en) | 2014-01-23 | 2014-01-23 | High-pressure-difference adjusting valve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742693A CN103742693A (en) | 2014-04-23 |
| CN103742693B true CN103742693B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410033165.9A Expired - Fee Related CN103742693B (en) | 2014-01-23 | 2014-01-23 | High-pressure-difference adjusting valve structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103742693B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185467B (en) * | 2018-11-20 | 2024-06-18 | 南通龙源电站阀门有限公司 | Anti-scouring stop valve with replaceable valve seat |
| CN114462332A (en) * | 2022-02-07 | 2022-05-10 | 浙江大学 | High-pressure-difference solid-containing regulating valve and design method of multi-stage sleeve structure in valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2744901Y (en) * | 2004-08-16 | 2005-12-07 | 上海平安高压调节阀门厂 | Heavy pressure by-pass spraying water control valve |
| CN101014792A (en) * | 2004-09-28 | 2007-08-08 | Cla-Val公司 | Anti-cavitation valve assembly |
| CN201795159U (en) * | 2010-09-15 | 2011-04-13 | 南通市电站阀门有限公司 | Nested regulating valve for soot blower |
| CN201818868U (en) * | 2010-06-10 | 2011-05-04 | 杭州杭辅电站辅机有限公司 | High-temperature and high-pressure temperature and pressure relief valve |
| CN202646752U (en) * | 2012-03-23 | 2013-01-02 | 浙江三方控制阀股份有限公司 | Three-stage pressure reduction regulating valve |
| CN203703286U (en) * | 2014-01-23 | 2014-07-09 | 章华 | Structure of high-pressure-difference regulating valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9010371B2 (en) * | 2011-12-16 | 2015-04-21 | Cla-Val Co. | Anti-cavitation valve seat |
-
2014
- 2014-01-23 CN CN201410033165.9A patent/CN103742693B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2744901Y (en) * | 2004-08-16 | 2005-12-07 | 上海平安高压调节阀门厂 | Heavy pressure by-pass spraying water control valve |
| CN101014792A (en) * | 2004-09-28 | 2007-08-08 | Cla-Val公司 | Anti-cavitation valve assembly |
| CN201818868U (en) * | 2010-06-10 | 2011-05-04 | 杭州杭辅电站辅机有限公司 | High-temperature and high-pressure temperature and pressure relief valve |
| CN201795159U (en) * | 2010-09-15 | 2011-04-13 | 南通市电站阀门有限公司 | Nested regulating valve for soot blower |
| CN202646752U (en) * | 2012-03-23 | 2013-01-02 | 浙江三方控制阀股份有限公司 | Three-stage pressure reduction regulating valve |
| CN203703286U (en) * | 2014-01-23 | 2014-07-09 | 章华 | Structure of high-pressure-difference regulating valve |
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| Publication number | Publication date |
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| CN103742693A (en) | 2014-04-23 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 226661, No. 01, building D, bent boat garden, Hu Hu Village, Qu Hu Town, Nantong County, Jiangsu, Haian Applicant after: Zhang Hua Address before: Suzhou City, Jiangsu province 215026 Industrial Park of Suzhou Xinglong Street Tinglan home building 16 room 409 Applicant before: Zhang Hua |
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| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191029 Address after: 201323 Shanghai city Pudong New Area Zhuqiao gold Lianglu No. 32 Patentee after: Floauto (Shanghai) Control Valve Co., Ltd. Address before: 226661, No. 01, building D, bent boat garden, Hu Hu Village, Qu Hu Town, Nantong County, Jiangsu, Haian Patentee before: Zhang Hua |
|
| 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: 20170208 Termination date: 20210123 |