CN107289190A - High Pressure Difference labyrinth regulating valve - Google Patents
High Pressure Difference labyrinth regulating valve Download PDFInfo
- Publication number
- CN107289190A CN107289190A CN201710692767.9A CN201710692767A CN107289190A CN 107289190 A CN107289190 A CN 107289190A CN 201710692767 A CN201710692767 A CN 201710692767A CN 107289190 A CN107289190 A CN 107289190A
- Authority
- CN
- China
- Prior art keywords
- valve
- bonnet
- high pressure
- pressure difference
- labyrinth
- 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.)
- Pending
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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
- F16K47/08—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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- 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
- F16K1/32—Details
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of High Pressure Difference labyrinth regulating valve, including valve body, bonnet and valve rod, valve pocket is set in the valve body, the valve body is being provided with delivery port along the first position in oneself height direction, the second place of oneself height is being provided with water inlet, the water inlet is located above the delivery port, the water inlet and the delivery port are communicated with the valve pocket, the valve pocket is provided with valve seat in the position between the water inlet and the delivery port, labyrinth type core bag is provided with above the valve seat, the bonnet is fixed on the valve body, one end of the valve rod sets valve element, the valve element can pass through the labyrinth type core bag and block on the valve seat.The regulating valve of the present invention, can be applied to different pressure differences.
Description
Technical field
The present invention relates to a kind of regulating valve, in particular it relates to a kind of High Pressure Difference fan applied to severe service
Palace regulating valve.
Background technology
At present, in terms of conventional thermal power generating equipment, domestic unit from 300,000 kilowatts, 600,000 kilowatts of Subcritical Units to
Overcritical, ultra supercritical 660,000 kilowatts and 1,000,000 kilowatts of unit transition.In overcritical and ultra supercritical state, water is by liquid
Steam state is directly becoming, i.e., superheated steam, saturated vapor are directly becoming by moist steam, the thermal efficiency is higher, therefore extra-supercritical unit
With coal consumption is low, good environmental protection, it is with high content of technology the characteristics of, generatine set heat efficiency can reach 45% or so, but simultaneously for
Electric power factory equipment proposes higher, tightened up, more reliable technical requirements, and particularly the critical valves of some key positions are required more
It is strict, general power plant uses the valve of import brand at present.
Desuperheating water regulating valve is one of crucial control valve in thermal power plant, and main function is as the micro- of reheat steam temperature
Amount regulation, and acted on as the spray desuperheating under accident condition.The main key technical problems of the valve are desuperheating water regulations
Pressure difference is than larger before and after valve, and according to no unit, use occasion, pressure difference is between tens kilograms to more than 100 kilograms, at this
Under high pressure difference, medium easily produces cavitation erosion with washing away to trim, and the sealing property of valve is just gradually lost, and causes flow
Much so that the temperature control difficult of steam, if long-term leakage rate is excessive, the thermal efficiency of unit will receive influence,
Cause the waste of the energy.
The flow sprayed water generally was controlled using telescoping valve even single-seat valve in the past, but is due to that pressure difference is larger before and after valve, was led
When cause medium flows through valve element with valve seat contracted section, flow velocity is too high, easily produces flash distillation and cavitation erosion, and the bubble that cavitation erosion is produced occurs
During explosion, the energy discharged causes great injury to trim, has had a strong impact on the sealing property of valve, has caused valve
Leakage rate it is excessive, it is impossible to vapor (steam) temperature is reached and is accurately controlled.
The content of the invention
The technical problems to be solved by the invention are, in view of the deficienciess of the prior art, there is provided a kind of High Pressure Difference
Labyrinth regulating valve, it can be applied to the severe service of HTHP.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of High Pressure Difference labyrinth regulating valve, including
Valve pocket is set in valve body, bonnet and valve rod, the valve body, and the valve body is provided with along the first position in oneself height direction
Delivery port, is provided with water inlet in the second place along oneself height, and the water inlet is located above the delivery port, it is described enter
The mouth of a river and the delivery port are communicated with the valve pocket, and the valve pocket is between the water inlet and the delivery port
Position, which is provided with above valve seat, the valve seat, is provided with labyrinth type core bag, and the bonnet is fixed on the valve body, the valve
One end of bar sets valve element, and the valve element can pass through the labyrinth type core bag and block on the valve seat.
Preferably, the valve seat bottom set it is fluted, be provided with the groove for the valve body with
Sealed first spirotallic gasket between the valve seat.
Preferably, the valve pocket is located at the centre position of the valve body, and the water inlet is by close to the valve pocket
One end is tilted down to away from described valve pocket one end, and the delivery port is by close to described valve pocket one end to remote described valve pocket one end
It is inclined upwardly.
Preferably, the valve body is formed with the bonnet for forging.
Preferably, the bonnet has the longitudinally projecting portion extended in the valve pocket, the longitudinally projecting portion
Pilot bushing is provided between the labyrinth type core bag.
Preferably, sealed between the bonnet and the valve body by the second spirotallic gasket.
Preferably, the bonnet is fixed with the valve body by the first stud and the first nut.
Preferably, it is provided with seal assembly between the valve rod and the bonnet.
Preferably, the position that the top of the bonnet is located at outside the valve rod opens up annular groove, the sealing group
Part includes being arranged on the packing bushing in the annular groove, the airtight and watertight padding above the packing bushing and positioned at described
Hold-down grid above airtight and watertight padding, the hold-down grid is fixed with the bonnet by the second stud and the second nut.
Preferably, it is provided with filler pressing sleeve between the hold-down grid and the airtight and watertight padding.
Implement the High Pressure Difference labyrinth regulating valve of the present invention, have the advantages that：Because trim uses special setting
Labyrinth type core bag so that flow through valve element, the flow velocity of the medium of valve seat and do not result in very big influence.This regulating valve, medium
When flowing through the runner to form the bending wrapped in labyrinth type core, the energy of each consumption medium of turning, it is ensured that medium flowing out stream
Flow velocity during road will not produce influence to trim, and therefore, this regulating valve can be useful in different pressure differences.Valve body is selected with bonnet
With forge piece, it has more uniform structure, more preferable density and more preferable intensity, meets the harsh shape of HTHP
Condition, can reach and vapor (steam) temperature is controlled well.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the schematic cross-sectional view of the High Pressure Difference labyrinth regulating valve of the present invention；
Fig. 2 is the schematic top plan view of Fig. 1 labyrinth type core bag.
In the figures above,
1- valve bodies；101- valve pockets；The spirotallic gaskets of 2- first；3- valve seats；4- valve rods；5- labyrinth type core bags；501- runners；In 502-
Heart hole；6- pilot bushings；The spirotallic gaskets of 7- second；8- bonnets；The studs of 9- first；The nuts of 10- first；11- packing bushings；12-
Airtight and watertight padding；13- filler pressing sleeves；14- hold-down grids；The studs of 15- second；The nuts of 16- second；17- water inlets；18- delivery ports.
Embodiment
In order that the object, technical solutions and advantages of the present invention are more clearly understood, it is right with reference to embodiment and accompanying drawing
The present invention is further described.
Present invention relates generally to a kind of special regulating valve, some harsh harsh operating modes are widely used in, especially
It is that use is more extensive on the supercritical unit in thermal power plant, its main function is that High Pressure Difference is drawn before and after avoiding valve
Flash distillation, cavitation erosion, vibration, noise risen etc. causes the problem of trim is damaged, and belongs to thermal power plant high temperature high pressure, extraordinary tune
Save one kind of valve.Next, being introduced with reference to accompanying drawing.
Shown in reference picture 1~2, High Pressure Difference labyrinth regulating valve of the invention, including valve body 1, bonnet 8 and valve rod 4, valve body
Valve pocket 101 is set in 1, and the valve pocket 101 can accommodate fluid media (medium) and valve seat 3 etc..
As depicted in figs. 1 and 2, valve body 1 is provided with delivery port 18 in the first position along oneself height direction, along itself
The second place of height is provided with water inlet 17, and water inlet 17 is located at the top of delivery port 18, and water inlet 17 and delivery port 18 are equal
Communicated with valve pocket 101.As shown in figure 1, valve pocket 101 is located at the centre position of the left and right directions of valve body 1, water inlet 17 is by close to valve pocket
101 one end to tilting down away from the one end of valve pocket 101, delivery port 18 from close to the one end of valve pocket 101 to away from the one end of valve pocket 101 to
It is upper to tilt.Valve pocket 101 is provided with valve seat 3 in the position between water inlet 17 and delivery port 18, specially water inlet 17 with
Position between the short transverse of delivery port 18.It is preferred that, to realize the sealing between valve seat 3 and valve body 1, prevent letting out for fluid
Dew, the bottom of valve seat 3 sets fluted, and the groove can be to be provided with annular/ring-type shown in figure, groove for valve body
Sealed first spirotallic gasket 2 between 1 and valve seat 3.The top of valve seat 3 is provided with labyrinth type core bag 5, and the labyrinth type core bag 5 is
Structure shown in Fig. 2, there is multi-disc labyrinth piece to combine for it, and the runner 501 of multiple bendings is formed on labyrinth type core bag 5,
Labyrinth type core bag 5 can be passed through by middle centre bore 502 for valve rod 4.
To ensure that valve can be useful in different pressure differences, according to different media, different pressure, different flows enter
Size, the quantity of curved number of the bend of row design labyrinth type core bag 5, and the valve of same specification, same bore has height
Interchangeability, greatly facilitate maintenance with after sale, it is ensured that valve can carry out on-line maintenance.
Bonnet 8 is fixed on valve body 1, for example, as a kind of mode, bonnet 8 passes through the first spiral shell shown in figure with valve body 1
The nut 10 of post 9 and first is fixed.Valve body 1 is preferably that forging is formed with bonnet 8, forms complete pressure boundary.Due to forging material
Material has more uniform structure, more preferable density and more preferable strength integrity, and in temperature change very big environment
Under, the fatigue resistance of its creep is higher by much than casting, so more adapting to the harsh occasion of HTHP.
One end of valve rod 4 sets valve element, and the valve element can be integral type structure with valve rod 4, and valve element can pass through labyrinth type
Core bag 5 and block on valve seat 3.
Fig. 1 is continued referring to, for ease of the positioning of labyrinth type core bag 5, the upper and lower ends of labyrinth type core bag 5 are close to itself
Centre bore（Passed through for valve element）Position be respectively provided with annular recess, the protuberance that valve seat 3 is formed is embedded in the ring of its lower end
Shape groove, is positioned to it.As for upper end, bonnet 8 has the longitudinally projecting portion extended in valve pocket 101, longitudinally projecting portion and fan
Pilot bushing 6 is provided between Gong Shixin bags 5, similarly, the pilot bushing 6 has by the raised protuberance in centre position, should
Protuberance is respectively embedded into the annular recess of labyrinth type core bag 5 and is opened in the annular recess of bonnet 8.This pilot bushing 6
Mode, ensure that bonnet 8 with the build-up tolerance of valve body 1 within technical scope.
As shown in FIG., bonnet 8 passes through the first foregoing stud 9 and the first nut in the position of itself flange and valve body 1
10 connections, it is preferred that sealed between bonnet 8 and valve body 1 by the second spirotallic gasket 7, so, be prevented effectively from the stream in valve body 1
Body flows out between bonnet 8 and valve body 1.
In addition, to realize the sealing between valve rod 4 and bonnet 8, seal assembly is provided between valve rod 4 and bonnet 8.It is preferred that
For the top of bonnet 8（Position away from valve body 1）Position outside valve rod 4 opens up annular groove, and seal assembly includes being arranged on
Packing bushing 11 in annular groove, the airtight and watertight padding 12 positioned at the top of packing bushing 11 and filling out positioned at the top of airtight and watertight padding 12
Expect pressing plate 14, hold-down grid 14 is fixed with bonnet 8 by the second stud 15 and the second nut 16.Further, hold-down grid 14
Filler pressing sleeve 13 is provided between airtight and watertight padding 12.
The present invention uses high in and low out（Water inlet 17 is in the top of delivery port 18）Structure, so when medium flows through the valve,
What is first passed around is labyrinth type core bag 5, when medium passes through sinuate runner 501, the energy of each consumption medium of turning
Amount, it is ensured that flow velocity when medium reserves runner will not produce influence to trim, and valve is flowed by the up and down action of valve rod 4
The regulation of amount, and then requirement of the system for flow is met, medium flows to valve after by labyrinth type core bag 5 by valve seat 3
The delivery port 18 of door.
The present invention is used under high temperature, the harsh harsh working condition of high pressure, can avoid due to flash distillation, gas caused by High Pressure Difference
Erosion is washed away to trim；Because trim employs the labyrinth type core bag of unique design so that flow through the medium of valve element, valve seat
Flow velocity does not result in very big influence；The sealing surface of valve element and valve seat uses linear sealing, in the closing process of valve, and similar
The valve of type is compared, and torque is greatly reduced, and executing agency's moment of torsion of selection can reduce a lot, save cost.By special
Labyrinth flow-path design, pressure makes medium first pass through labyrinth bend to carry out step pressure reducing, pass through valve element and valve seat, be prevented effectively from
The problem of flash distillation, cavitation erosion, noise etc. influence valve seal caused by High Pressure Difference.In addition, economic and reliable of the present invention.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of High Pressure Difference labyrinth regulating valve, it is characterised in that including valve body, bonnet and valve rod, valve is set in the valve body
Chamber, the valve body is being provided with delivery port along the first position in oneself height direction, is set along the second place of oneself height
Have a water inlet, the water inlet is located above the delivery port, the water inlet and the delivery port with the valve pocket phase
Logical, the valve pocket is provided with above valve seat, the valve seat in the position between the water inlet and the delivery port and set
Labyrinth type core bag is equipped with, the bonnet is fixed on the valve body, one end of the valve rod sets valve element, and the valve element can be worn
Cross the labyrinth type core bag and block on the valve seat.
2. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that the bottom of the valve seat is provided with recessed
It is provided with groove, the groove for sealed first spirotallic gasket between the valve body and the valve seat.
3. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that the valve pocket is located in the valve body
Between position, the water inlet by close to described valve pocket one end to tilting down away from described valve pocket one end, the delivery port by by
Nearly described valve pocket one end is inclined upwardly to away from described valve pocket one end.
4. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that the valve body is forging with the bonnet
Form.
5. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that the bonnet, which has, extends to the valve
The longitudinally projecting portion of intracavitary, pilot bushing is provided between the longitudinally projecting portion and the labyrinth type core bag.
6. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that lead between the bonnet and the valve body
Cross the sealing of the second spirotallic gasket.
7. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that the bonnet and the valve body pass through the
One stud and the first nut are fixed.
8. High Pressure Difference labyrinth according to claim 1 regulating valve, it is characterised in that set between the valve rod and the bonnet
It is equipped with seal assembly.
9. High Pressure Difference labyrinth according to claim 8 regulating valve, it is characterised in that the top of the bonnet is located at the valve
Position outside bar opens up annular groove, packing bushing that the seal assembly includes being arranged in the annular groove, fills out positioned at described
Expect the airtight and watertight padding above bushing and the hold-down grid above the airtight and watertight padding, the hold-down grid and the bonnet
Fixed by the second stud and the second nut.
10. High Pressure Difference labyrinth according to claim 9 regulating valve, it is characterised in that the hold-down grid and the sealing
Filler pressing sleeve is provided between filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692767.9A CN107289190A (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692767.9A CN107289190A (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107289190A true CN107289190A (en) | 2017-10-24 |
Family
ID=60106162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710692767.9A Pending CN107289190A (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289190A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898754A (en) * | 2020-07-06 | 2022-01-07 | 上海大通仪表有限公司 | PCV relief valve that overhauls on line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130193360A1 (en) * | 2011-12-30 | 2013-08-01 | Emerson Process Management (Tianjin) Valves Co. Ltd. | Valve Trim Assembly and Flow Control Valve Including the Valve Trim Assembly |
| CN204254014U (en) * | 2014-10-11 | 2015-04-08 | 开封高中压阀门有限公司 | A kind of high pressure bypass valve |
| CN205781330U (en) * | 2016-05-26 | 2016-12-07 | 吉林市创合流体控制设备制造有限公司 | A kind of single-seat valve of effective reduction noise |
| CN206310069U (en) * | 2016-10-11 | 2017-07-07 | 杭州佳能阀门有限公司 | Regulating valve |
| CN207145756U (en) * | 2017-08-14 | 2018-03-27 | 上海一核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
-
2017
- 2017-08-14 CN CN201710692767.9A patent/CN107289190A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130193360A1 (en) * | 2011-12-30 | 2013-08-01 | Emerson Process Management (Tianjin) Valves Co. Ltd. | Valve Trim Assembly and Flow Control Valve Including the Valve Trim Assembly |
| CN204254014U (en) * | 2014-10-11 | 2015-04-08 | 开封高中压阀门有限公司 | A kind of high pressure bypass valve |
| CN205781330U (en) * | 2016-05-26 | 2016-12-07 | 吉林市创合流体控制设备制造有限公司 | A kind of single-seat valve of effective reduction noise |
| CN206310069U (en) * | 2016-10-11 | 2017-07-07 | 杭州佳能阀门有限公司 | Regulating valve |
| CN207145756U (en) * | 2017-08-14 | 2018-03-27 | 上海一核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898754A (en) * | 2020-07-06 | 2022-01-07 | 上海大通仪表有限公司 | PCV relief valve that overhauls on line |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171024 |
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