CN207145756U - High Pressure Difference labyrinth regulating valve - Google Patents
High Pressure Difference labyrinth regulating valve Download PDFInfo
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- CN207145756U CN207145756U CN201721013699.0U CN201721013699U CN207145756U CN 207145756 U CN207145756 U CN 207145756U CN 201721013699 U CN201721013699 U CN 201721013699U CN 207145756 U CN207145756 U CN 207145756U
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- valve
- bonnet
- high pressure
- pressure difference
- labyrinth
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Abstract
The utility model 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 communicate 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.Regulating valve of the present utility model, different pressure differences can be applied to.
Description
Technical field
A kind of regulating valve is the utility model is related to, specifically, the utility model is related to a kind of applied to severe service
High Pressure Difference labyrinth regulating valve.
Background technology
At present, routine thermal power generating equipment in terms of, 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 require more
It is strict, general power plant uses the valve of import brand at present.
Desuperheating water regulating valve is one of control valve crucial in thermal power plant, and main function is as the micro- of reheat steam temperature
Amount regulation, and as the spray desuperheating effect under accident condition.The main key technical problems of the valve are desuperheating water regulations
Pressure difference is bigger 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
It is 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.
Generally use telescoping valve even single-seat valve controlled the flow of water spray in the past, but due to before and after valve pressure difference compared with
Greatly, when causing the medium to flow through valve element and valve seat contracted section, flow velocity is too high, easily produces flash distillation and cavitation erosion, gas caused by cavitation erosion
Be soaked raw explosion when, the energy discharged causes greatly to injure to trim, has had a strong impact on the sealing property of valve, has led
Cause the leakage rate of valve excessive, vapor (steam) temperature can not be reached and be accurately controlled.
The content of the invention
Technical problem to be solved in the utility model is, in view of the deficienciess of the prior art, providing a kind of height
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 in the utility model is：A kind of High Pressure Difference labyrinth regulating valve,
Including valve body, bonnet and valve rod, valve pocket is set, the valve body is set along the first position in oneself height direction in the valve body
Delivery port is equipped with, water inlet is provided with the second place along oneself height, the water inlet is located above the delivery port, institute
State water inlet and the delivery port communicate with the valve pocket, the valve pocket positioned at the water inlet and the delivery port it
Between position be provided with valve seat, labyrinth type core bag is provided with above the valve seat, the bonnet is fixed on the valve body, institute
The one end for stating valve rod 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
The first spirotallic gasket sealed 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 tilts 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 forms 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 are 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 High Pressure Difference labyrinth of the present utility model regulating valve, have the advantages that：Because trim uses especially
The labyrinth type core bag of setting so that flow through valve element, the flow velocity of medium of valve seat will not cause very big influence.This regulating valve,
When medium flows through the runner to form the bending wrapped in labyrinth type core, the energy of each consumption medium of turning, ensure medium flow field
Flow velocity when going out runner will not have an impact to trim, and therefore, this regulating valve can be useful in different pressure differences.Valve body and valve
Lid selects forge piece, and it has more uniform structure, more preferable density and more preferable intensity, meets the harsh of HTHP
Situation, it can reach and vapor (steam) temperature is controlled well.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the schematic cross-sectional view of High Pressure Difference labyrinth of the present utility model regulating valve；
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；
502- centre bores；6- pilot bushings；The spirotallic gaskets of 7- second；8- bonnets；The studs of 9- first；The nuts of 10- first；11- fillers serve as a contrast
Set；12- airtight and watertight paddings；13- filler pressing sleeves；14- hold-down grids；The studs of 15- second；The nuts of 16- second；17- water inlets；18-
Delivery port.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, with reference to embodiment and attached
Figure, the utility model is further described.
The utility model is mainly concerned with a kind of special regulating valve, is widely used in some harsh harsh operating modes,
Particularly on the supercritical unit in thermal power plant, use is more extensive, and its main function is to avoid high pressure before and after valve
The problem of flash distillation, cavitation erosion, vibration, noise etc. cause trim to damage caused by poor, belong to thermal power plant high temperature high pressure, spy
One kind of kind regulating valve.Next, it is introduced with reference to accompanying drawing.
Shown in reference picture 1~2, High Pressure Difference labyrinth of the present utility model regulating valve, including valve body 1, bonnet 8 and valve rod 4,
Valve pocket 101 is set in valve body 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
Upper inclination.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.Preferably, to realize the sealing between valve seat 3 and valve body 1, letting out for fluid is prevented
Dew, the bottom setting of valve seat 3 is fluted, and the groove can be annular/ring-type shown in figure, be provided with groove for valve body
The first spirotallic gasket 2 sealed 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 the centre bore 502 of centre for valve rod 4.
To ensure that valve can be useful in different pressure differences, according to different media, different pressure, different flow enters
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 forms 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 the very big environment of temperature change
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, bonnet 8 can be ensured 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, effectively avoid the stream in valve body 1
Body between bonnet 8 and valve body 1 by flowing out.
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 above packing bushing 11 and filling out above 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 utility model uses high in and low out（Water inlet 17 is above delivery port 18）Structure, so medium flows through the valve
When, what is first passed around is labyrinth type core bag 5, when medium passes through sinuate runner 501, each consumption medium of turning
Energy, ensure that flow velocity when medium reserves runner will not have an impact to trim, valve is carried out by the up and down action of valve rod 4
The regulation of flow, and then meet requirement of the system for flow, medium is flowed to after by labyrinth type core bag 5 by valve seat 3
The delivery port 18 of valve.
The utility model be used for high temperature, high pressure harsh harsh working condition under, can avoid caused by High Pressure Difference dodge
Steam, cavitation erosion is washed away to trim；Because trim employs the labyrinth type core bag of unique design so that flow through valve element, valve seat
Velocity of medium will not cause very big influence；The sealing surface of valve element and valve seat uses linear sealing, in the closing process of valve,
Compared with the valve of same type, torque greatly reduces, and executing agency's moment of torsion of selection can reduce a lot, save cost.It is logical
Special labyrinth flow-path design is crossed, pressure makes medium first pass through labyrinth bend progress step pressure reducing, passes through valve element and valve seat, have
Effect avoids the problem of flash distillation, cavitation erosion, noise etc. influence valve seal caused by High Pressure Difference.In addition, the utility model economy can
Lean on.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is 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 are being provided with delivery port along the first position in oneself height direction, are 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 valve seat in the position between the water inlet and the delivery port, is set above the valve seat
Labyrinth type core bag is equipped with, the bonnet is fixed on the valve body, and 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
Groove, the first spirotallic gasket for being sealed between the valve body and the valve seat is provided with the groove.
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 |
|---|---|---|---|
| CN201721013699.0U CN207145756U (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721013699.0U CN207145756U (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207145756U true CN207145756U (en) | 2018-03-27 |
Family
ID=61666420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721013699.0U Active CN207145756U (en) | 2017-08-14 | 2017-08-14 | High Pressure Difference labyrinth regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207145756U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289190A (en) * | 2017-08-14 | 2017-10-24 | 上海核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| 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 |
-
2017
- 2017-08-14 CN CN201721013699.0U patent/CN207145756U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289190A (en) * | 2017-08-14 | 2017-10-24 | 上海核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| 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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