CN110274041A - Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve - Google Patents
Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve Download PDFInfo
- Publication number
- CN110274041A CN110274041A CN201910660172.4A CN201910660172A CN110274041A CN 110274041 A CN110274041 A CN 110274041A CN 201910660172 A CN201910660172 A CN 201910660172A CN 110274041 A CN110274041 A CN 110274041A
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- flap
- sealing
- double
- seat
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- 238000007789 sealing Methods 0.000 title claims abstract description 147
- 210000004894 snout Anatomy 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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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
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
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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
- F16K1/52—Means for additional adjustment of the rate of flow
Abstract
The present invention relates to double-sealing face valve seal pair, double-sealing face valve and as the application of bypass valve.Double-sealing face valve seal pair, its valve seat is equipped with primary sealing area and secondary sealing area, spool includes the first flap and the second flap, first flap and the second flap are equipped with sealing surface, second flap is located in the cylindrical groove of the lower end surface of the first flap, with the snug engagement of cylindrical groove, the thrust spring for pushing down on the second flap is equipped between the first flap and the second flap.Double-sealing face valve includes valve body and primary seal pair, and primary seal pair uses above-mentioned double-sealing face valve seal pair, and secondary valve sealing pair and corresponding secondary valve medium channel can be arranged on the first flap.Above-mentioned valve may be used as bypass valve, especially be used as the bypass valve of turbine bypass system.The present invention can be improved the sealing performance of valve, avoid or mitigate valve or turbine by-pass leakage.
Description
Technical field
The present invention relates to double-sealing face valve seal pair, using the double-sealing face valve of this valve seal pair and this pair
Application of the sealing surface valve as bypass valve, the application especially on turbine bypass system.
Background technique
The matched turbine bypass system of thermal power generation unit is all responsible in the starting, shutdown and operation of unit at present
Important role, for promoting boiler pressure, steam temperature during unit starting, for recycling work during orderly closedown
Matter, for preventing boiler superpressure during unit failure tripping, removal of load.However the bypass valve of many power plant all occurs at present
The defect of interior leakage, the interior leakage of bypass valve will lead to some vapor around the corresponding cylinder of steam turbine, make the acting ability of steam turbine
Decline, performance driving economy decline；It may also result in Low Temperature Reheater tube wall temperature overtemperature simultaneously；It may make turbine discharge temperature
Degree increases.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of double-sealing face valve seal pairs, a kind of this valve of use
The double-sealing face valve of door sealing pair and a kind of turbine by-pass using this double-sealing face valve, to improve the sealing of valve
Performance avoids or mitigates turbine by-pass leakage.
The technical scheme is that a kind of double-sealing face valve seal pair, including valve seat and spool, the valve seat are equipped with
Primary sealing area and secondary sealing area, the primary sealing area of valve seat end face disposed thereon, the secondary sealing area of the valve seat
Positioned at the top of the medial surface of the valve seat, the spool includes the first flap and the second flap, first flap and described
Second flap is equipped with sealing surface, and the sealing surface of first flap is located at its lower end surface, using with it is the first of the valve seat close
The structure that cover matches forms the first valve seal pair, the sealing of second flap with the first face cover of the valve seat
Face is located at the outer rim of its bottom, the structure to be matched using the secondary sealing area with the valve seat, the second face with the valve seat
Cover forms the second valve seal pair, and the middle part of the lower end surface of first flap is equipped with cylindrical groove, second flap position
In in the cylindrical groove of the lower end surface of first flap, the cylindrical groove of the lower end surface of lateral surface and first flap
Snug engagement, first flap are equipped with the second flap limit that can limit pan position under the second flap maximum
Structure is equipped with the thrust spring for pushing down on second flap between first flap and second flap.
The vertical axis of the valve seat, first flap and second flap should be typically located on same straight line.
The spool should be typically located at the top of the valve seat.
The edge of the lower end surface of first flap is preferably provided with the annular flange extended downwardly out, first flap
Lower end surface annular flange internal diameter be greater than the valve seat top outer diameter.
A kind of double-sealing face valve, including valve body and primary seal pair, the valve body are equipped with the valve chamber for constituting medium channel, institute
Primary seal pair is stated using any one double-sealing face valve seal pair disclosed by the invention, the valve seat is horizontally disposed, fixed peace
On the inner wall of the valve body, center through hole constitutes the necessary path in the intracorporal medium channel of the valve, the spool
Positioned at the top of the valve seat, it is connected with valve rod, the valve rod passes through the valve deck of the valve body, and it rotates and connects with the valve deck,
The upper end is located at outside the valve body, and lower end is located in the valve body, and the valve deck is located at the top of the valve body, is fixedly mounted on
In the main part of the valve body, the top opening of the main part of the valve body is closed.
From valve inlet to valve export, the valve chamber can be divided into snout cavity, lumen and outlet plenum, the lumen
At least it is located at the top of the outlet plenum with the connected region of the outlet plenum at it, the valve seat may be mounted at the lumen
Between the outlet plenum.
The throat bushing of tubular, the lateral surface of first flap and the inner wall of the throat bushing can be equipped in the lumen
It is slidably matched, the lower part of the throat bushing is equipped with marking shape window (hole), so that medium is able to pass through from its marking shape window, is formed
Across the medium channel of corresponding region.
Secondary valve medium channel and secondary valve sealing pair are preferably provided on first flap, it can be using the existing of any suitable
Technology, for example, the prior art on main valve clack is arranged in secondary valve sealing pair.
The pair valve medium channel may include the center through hole of first flap.The center through hole of first flap
In axial direction, using up big and down small multistage non-uniform structure, the pair valve sealing pair includes auxiliary-seat and secondary flap, the pair valve
Between the upper section and middle section of the center through hole that first flap is arranged in seat, first flap is arranged in the secondary flap
In the upper section of center through hole, be slidably matched with the upper section of the center through hole of first flap, the auxiliary-seat and secondary flap it
Between be equipped with mutually matched sealing surface, the lower end of the valve rod and secondary flap rotation are connected, and are achieved in and the valve
The connection of core.
It should be usually equipped with for limiting pan position in the secondary flap maximum on first flap.
The pair for pushing up secondary flap relative to the first flap is preferably provided between first flap and the secondary flap
Flap thrust spring.
Any one double-sealing face valve provided by the invention is used as the application of bypass valve.
It is especially used on the bypass duct of turbine bypass system as bypass valve.Thus form a kind of steam turbine
Bypath system is equipped with bypass duct, and the bypass duct is equipped with bypass valve, and the bypass valve is using disclosed by the invention any
A kind of double-sealing face valve, the by-pass line can use the prior art.
The beneficial effects of the present invention are: since the key point for valves leakage has carried out double containment design, it is close in valve
It seals and is provided with two groups of sealing surfaces in secondary (or primary seal pair), and use the principle of Redundancy Design in the design, it is close by twice
For envelope to guarantee valve zero leakage, the sealing performance of valve obtains larger raising；Since the outer rim of the first flap is provided with to downward
The small flange stretched, block media stream directly wash away the sealing surface of the first sealing pair, play protection the first sealing secondary sealing area
Effect；Using equalizing valve structure, executing agency's switch force of unbalanced valve can be effectively reduced, to reduce unlatching main valve
The power of core makes to switch more flexible reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of double-sealing face valve of the present invention；
Fig. 2 is the partial structural diagram of double-sealing face valve seal pair of the present invention in closed state；
Fig. 3 is the partial structural diagram of double-sealing face valve seal pair of the present invention in the on state；
Fig. 4 is the partial structural diagram of secondary valve sealing pair of the present invention and secondary valve medium channel；
Fig. 5 is that the present invention relates to the structural schematic diagrams of each sealing surface of valve seat.
Specific embodiment
Referring to Fig. 1-5, the present invention provides a kind of double-sealing face valve seal pairs comprising valve seat 40 and spool, it is described
Valve seat is equipped with primary sealing area 41 and secondary sealing area 42, and the primary sealing area of valve seat end face disposed thereon can be ring
The plane of shape, or the suitable shapes such as annular cambered surface, the secondary sealing area of the valve seat are located at the inside of the valve seat
The top in face, the preferably annular conical surface, or the suitable shape such as annular protrusion, the spool include the first flap 20
With including the second flap 30, first flap is equipped with sealing surface 21, and the sealing surface of first flap is located at its lower end surface, adopts
The structure to be matched with the primary sealing area with the valve seat forms the first valve seal with the first face cover of the valve seat
Pair can be bonded to each other with the primary sealing area of the valve seat and form sealing, can be suitable for planar annular or annular cambered surface etc.
Answer shape, second flap is equipped with sealing surface 32, and the sealing surface of second flap is located at the outer rim of its bottom, using with institute
The structure that the secondary sealing area of valve seat matches is stated, forms the second valve seal pair with the second face cover of the valve seat, it can
It is bonded to each other with the secondary sealing area of the valve seat and forms sealing, can be circular cone, planar annular or annular cambered surface etc.
Adapt to shape.
The middle part of the lower end surface of first flap is equipped with cylindrical groove, so that the lower end surface of first flap is
Annular surface, second flap are located in the cylindrical groove of the lower end surface of first flap, lateral surface and first valve
The snug engagement (allowing movable connection method of the two in the axial direction with respect to sliding) of the cylindrical groove of the lower end surface of valve, institute
It states the first flap and is equipped with the second flap that can limit pan position (extreme lower position in axial direction) under the second flap maximum
Position limiting structure, pan position under the maximum for limiting second flap cannot be detached from first valve to constrain the second flap
Valve extends downwardly excessive, is equipped between first flap and second flap for pushing down on second flap
Thrust spring 35 pushes second flap under its maximum pan position under not by external force.
The basic shape of the valve seat, the first flap and the second flap is usually surface of revolution shape.
The vertical axis of the valve seat, first flap and second flap is located along the same line.
The spool should be typically located at the top of the valve seat.Spool is moved down to close, is moved up to open.
It can make the spool at least at the extreme higher position of stroke range by the cooperation of each relative dimensions or position,
First valve seal pair (the primary sealing area phase point of the sealing surface of first flap and the valve seat in the open state
From) and the aperture of the first valve seal pair (or the sealing surface of first flap and the primary sealing area of the valve seat is mutual
Between axial distance) meet design requirement, the second valve seal pair it is in the open state (sealing surface of second flap with
The secondary sealing area of the valve seat mutually separates) and the second valve seal pair aperture (or sealing surface and the institute of second flap
State the mutual axial distance of the secondary sealing area of valve seat) meet design requirement, the spool is at least in the minimum of stroke range
When position, in closed state, (the first of the sealing surface of first flap and the valve seat is close for first valve seal vice division chief
Cover contact sealing) and the first valve seal pair sealing force (or the first of the sealing surface of first flap and the valve seat
Pressure between sealing surface) meet design requirement, the second valve seal pair it is in the open state (second flap it is close
Cover is mutually separated with the secondary sealing area of the valve seat) and the sealing force of the second valve seal pair (or second flap is close
Pressure between cover and the secondary sealing area of the valve seat) meet design requirement, second flap is relative to the first flap
Axial position (axial position in the cylindrical groove of the lower end surface of first flap) be not up to cylindrical groove permission
Extreme higher position, in the folding process of the spool, the first valve seal pair is closed prior to the second valve seal pair,
And at this time the first valve seal pair aperture (or the sealing surface of the first flap and the primary sealing area of the valve seat it is mutual
Axial distance) meet design requirement.
In the closing process of valve, the second sealing pair is closed first so that medium flow field is cut off substantially, the first flap into
Row moves down and the second flap is motionless, and thrust spring is compressed, and the first flap is allowed to move down relative to the second flap, until first close
Envelope is secondary to close, and during valve opening, then the first sealing pair is first opened, and then the second sealing pair is then turned on, by above-mentioned
Mode avoids the first sealing pair in valve switch and closing process because change dramatically generation is accelerated and flowed to medium flow field flow velocity
The damage such as cavitation erosion, be conducive to the sealing performance for keeping the first sealing pair, valve avoided leakage phenomenon prematurely occur, extend valve
Door service life or maintenance cycle.
The edge of the lower end surface of first flap is equipped with the annular flange 28 extended downwardly out, first flap
The internal diameter of the annular flange of lower end surface is greater than the top outer diameter of the valve seat, is thus in sealing state in first sealing pair
When, the top of the valve seat is at least trapped among wherein by the annular flange of the lower end surface of first flap.Pass through annular flange
Setting, can effectively shelter from or slow down erosion of the medium flow field to each sealing surface of the first sealing pair, be conducive to further protect
The sealing performance for demonstrate,proving the first sealing pair, prolongs the service life.
The present invention also provides a kind of double-sealing face valve, including valve body 10 and primary seal pair, the valve body, which is equipped with, to be constituted
The valve chamber of medium channel, the primary seal pair using the double-sealing face valve seal pair provided by the invention described in any one,
The valve seat is horizontally disposed, is fixedly mounted on the inner wall of the valve body, and it is logical that center through hole constitutes the intracorporal medium of valve
Necessary path in road, the spool are located at the top of the valve seat, are connected with valve rod 16, and the valve rod passes through the valve body
Valve deck is rotated with the valve deck 11 and is connected, and the upper end is located at outside the valve body, and lower end is located in the valve body, the valve deck position
It in the top of the valve body, is fixedly mounted in the main part of the valve body, closes the top of the main part of the valve body
Mouthful, which may be used as installation opening, valve deck is disassembled, and can pass through assembly, disassembly and the dimension inside top opening progress
It repairs.
From valve inlet to valve export, the valve chamber is divided into snout cavity 71, lumen and outlet plenum 73, the lumen
At least it is located at the top of the outlet plenum with the connected region of the outlet plenum at it, the valve seat is mounted on the lumen and institute
It states between outlet plenum, forms the boundary of the lumen and the outlet plenum, the center through hole structure of the valve seat from there through valve seat
At the only way which must be passed by lumen to outlet plenum, when valve is in the open state, the spool is in a high position, separates with valve seat,
Medium in lumen is able to flow into the center through hole of valve seat by the gap between spool and valve seat, and then flows into outlet plenum, when
When valve is in close state, the spool is in low level, and the first sealing pair and the second sealing pair are closed, and formation closes valve
The dual-seal of the center through hole of seat, the medium in lumen cannot flow into the center through hole of valve seat.
It can be set according to actual needs direction and the position of valve export and valve inlet, usual valve inlet can position
In the side (such as left side described in Fig. 1) of valve body, valve export can be located at the bottom of valve body.When needing to change valve inlet
When with the position and orientation of valve export, it can pass through and change the snout cavity and outlet plenum shape and valve inlet and valve
It exports the setting position on snout cavity and outlet plenum and realizes.
The throat bushing 18 of tubular can be equipped in the lumen, the lateral surface of first flap is interior with the throat bushing
Wall is slidably matched, and swings or shakes to avoid the first flap.
The upper end of the throat bushing connects the valve deck of the valve body, and marking shape window 78, institute is arranged in the lower part of the throat bushing
The quantity for stating marking shape window can be one or more, when to be multiple, can usually be uniformly distributed, be formed across phase in the circumferential
The medium channel in region is answered, the medium of snout cavity need to flow into lumen by the marking shape window, so that throat bushing has section
Stream effect, suitably sets the size of the spacing to realize required throttling.
The mounting means of the valve seat are as follows: the inner wall of the valve body is equipped with the annular stage of installation valve seat, the valve seat
It being inlaid in the annular stage, bottom surface is pressed on the stage end face of the annular stage, it which is provided with sealing ring, throat bushing 18
Bottom 46 is pressed on the sealing ring, and the throat bushing and sealing ring are fixed on valve body by way of valve body bolt presses, will
The valve seat is fixed downwards, can be with by the way that sealing ring is arranged between the corresponding stage in the lower edge and valve seat of throat bushing
Realize the sealing between valve seat and valve body.
First flap is equipped with secondary valve medium channel and secondary valve sealing pair, and the pair valve medium channel includes described the
The center through hole of one flap, the center through hole of first flap is in axial (vertical), not isometrical using up big and down small multistage
Structure, the pair valve sealing pair includes auxiliary-seat 60 and secondary flap 50, and the center of first flap is arranged in the auxiliary-seat
Between the upper section and middle section of through-hole, the secondary flap is arranged in the upper section of the center through hole of first flap, with described
The upper section of the center through hole of one flap is slidably matched, between the auxiliary-seat and secondary flap be equipped with mutually matched sealing surface 61,
51, the lower end of the valve rod and secondary flap rotation connect, and are achieved in the connection with the spool, first flap
The secondary flap for limiting pan position in the secondary flap maximum (the axial extreme higher position relative to the first flap) is equipped with to limit
Bit architecture, for example, being screwed in the center through hole of the first flap and being pressed in the secondary flap pressing plate 56 above the secondary flap.
The sealing surface 61 of the auxiliary-seat preferably uses circular cone structure, positioned at the secondary valve medium channel upper section and
The inside of the boundary end face in middle section, correspondingly, the sealing surface 51 in the secondary flap preferably uses circular cone structure, is located at institute
It is close in the secondary flap when mobile corresponding position under secondary flap on the outside of the edge for stating the center projections of the lower end surface of flap
Cover is in contact with the sealing surface on auxiliary-seat, fits together, and forms the sealing of secondary valve medium channel.
The secondary flap is equipped with several axial side through-holes 54, and the upper end opening of the side through-hole is in the secondary valve
The top surface of valve, lower ending opening is in the lower end surface of the secondary flap, positioned at the outside of the sealing surface of the secondary flap, works as institute as a result,
When the sealing face contact of the sealing surface and auxiliary-seat of stating secondary flap seals, by the secondary flap side through-hole lower port to institute
The medium channel for stating the center through hole of auxiliary-seat is cut off by secondary valve sealing pair, is in close state secondary valve, when secondary flap moves up
When being detached from auxiliary-seat, the medium flowed out from the side through-hole lower end of secondary flap is able to through the gap between secondary flap and auxiliary-seat
The center through hole of auxiliary-seat is flowed into, and then the center through hole by being located at the first valve seat below auxiliary-seat flows into the center of valve seat
Thus through-hole avoids the sealing of the first sealing pair and the second sealing pair to medium flow field, keeps secondary valve in the open state, snout cavity
Medium be able to enter outlet plenum by secondary valve medium channel.
The throat bushing is equipped with the radial through-hole 19 for penetrating its side, and the radial through-hole on the throat bushing is located at described
The top of first flap normal travel range (normally-open and closing stroke range), it is open at one end in the snout cavity, separately
It is open at one end in be located at first flap above lumen so that the medium of snout cavity be able to by this/these diameters
The top of the first flap is flowed to through-hole, even if the also top of secondary flap.
It can be logical by the side in the aperture for the radial through-hole being appropriately arranged on the throat bushing or the secondary flap
Hole the aperture perhaps aperture of the center through hole of first flap or the aperture of above-mentioned a variety of through-holes are formed to secondary valve medium
The biggish throttle effect in channel, makes secondary valve function only as the effect of pilot valve, dynamic when for reducing valve opening or close
Power demand makes secondary valve sealing pair without being adapted to excessive flow.
The pair for pushing up secondary flap relative to the first flap can be equipped between first flap and the secondary flap
Thus flap thrust spring 55 avoids being self-possessed because of secondary flap or inlet side pressure medium causes secondary flap to be automatically closed.
Annular end face, the secondary flap thrust spring are equipped between the middle section and lower section of the center through hole of first flap
It is preferred that using disc spring group or helical spring, in the center through hole of first flap, the upper end is against the secondary flap
Lower end (lower end surfaces of center projections), annular end of the lower end between the middle section and lower section of the center through hole of first flap
Face.
The central rods extended downwardly, first flap can be equipped in the cylindrical groove of the lower end surface of first flap
The central rods that pass through of center through hole, second flap is equipped with axial center through hole, and is covered by its center through hole in institute
It on the central rods for stating the first flap, is slidably matched with the central rods, institute can be made with the fit clearance of suitable control between the two
The second flap is stated not shake under the central rods of the first flap and/or the constraint of cylindrical groove during moving up and down.
The lower end of the central rods can be equipped with the second flap baffle, keep off below the second flap, be consequently formed to the
The limit of pan position under two flap maximums.
The baffle plate groove for the indent being adapted with the second flap baffle can be equipped on the lower end surface of second flap,
So that the second flap baffle is located in the baffle plate groove.
The second flap baffle can be set in the central rods of first flap in a ring, first flap
The lower end of central rods can be screwed with stop nut and can configure retaining ring etc., keep off in the lower section of the second flap baffle.
The spring groove of indent can be equipped on the upper surface of second flap, the thrust spring is located at the spring groove
It is interior, it covers on the central rods, it is preferred to use disc spring group or helical spring, the upper end are resisted against the central rods in corresponding site
Annular stage end face on, and washer can be set on the end face of the annular stage, lower end is resisted against second flap
Spring groove bottom surface on, the thrust to second flap is consequently formed.
Sealing ring can be set in the outer circle of first flap, it is close between the first flap and the throat bushing to realize
It seals, the recessed rank of annular at the top surface outer rim position of first flap can be set in the sealing ring in the outer circle of first flap
On platform, and the annular pressing plate 27 being pressed in above sealing ring is set, which is fixed by screw on the first flap, it will
Sealing ring compresses.
The valve export of the valve can be equipped with damping outlet pipe, and the damping outlet pipe is blind pipe, upper port connection
On valve export, lower port closing, if dry friction damping through-hole 75 is distributed on side wall, water outlet across these damp through-holes when by
Relatively large resistance, flow velocity lower, and flow reduces.
Large aperture drainpipe 81 is also provided on the valve body, the large aperture drainpipe is trapped among the damping outlet pipe
Outside, as needed, can be set all the way water outlet or multichannel water outlet.
It is disclosed by the invention it is each preferably with optional technological means, unless otherwise indicated and one preferably or can selecting technology hand
Section is that further limiting for another technological means is outer, can form several different technical solutions in any combination.
Claims (10)
1. a kind of double-sealing face valve seal pair, including valve seat and spool, the valve seat is equipped with primary sealing area, the valve seat
Primary sealing area end face disposed thereon, the spool include the first flap, and first flap is equipped with sealing surface, first valve
The sealing surface of valve is located at its lower end surface, the structure to be matched using the primary sealing area with the valve seat, with the valve seat
One face cover forms the first valve seal pair, it is characterised in that and the valve seat is additionally provided with secondary sealing area, and the second of the valve seat
Sealing surface is located at the top of the medial surface of the valve seat, and the spool further includes the second flap, and second flap is equipped with sealing
The sealing surface in face, second flap is located at the outer rim of its bottom, the knot to be matched using the secondary sealing area with the valve seat
Structure forms the second valve seal pair with the second face cover of the valve seat, and the middle part of the lower end surface of first flap is equipped with column
Connected in star, second flap are located in the cylindrical groove of the lower end surface of first flap, lateral surface and first valve
The snug engagement of the cylindrical groove of the lower end surface of valve, first flap, which is equipped with, can limit the second flap maximum
Second flap position limiting structure of lower pan position is equipped between first flap and second flap and is used for second valve
The thrust spring that valve pushes down on.
2. double-sealing face valve seal pair as described in claim 1, it is characterised in that the valve seat, first flap and institute
The vertical axis for stating the second flap is located along the same line.
3. double-sealing face valve seal pair as described in claim 1, it is characterised in that the spool is located at the upper of the valve seat
Side.
4. double-sealing face valve seal pair a method according to any one of claims 1-3, it is characterised in that the lower end of first flap
The edge in face is equipped with the annular flange extended downwardly out, and the internal diameter of the annular flange of the lower end surface of first flap is greater than institute
State the top outer diameter of valve seat.
5. a kind of double-sealing face valve, including valve body and primary seal pair, the valve body is equipped with the valve chamber for constituting medium channel, special
Sign is the primary seal pair using any double-sealing face valve seal pair of claim 1-4, and the valve seat level is set
It sets, is fixedly mounted on the inner wall of the valve body, center through hole constitutes the necessary path in the intracorporal medium channel of the valve,
The spool is located at the top of the valve seat, is connected with valve rod, and the valve rod passes through the valve deck of the valve body, revolves with the valve deck
Turning connection, the upper end is located at outside the valve body, and lower end is located in the valve body, and the valve deck is located at the top of the valve body, Gu
Dingan County closes the top opening of the main part of the valve body in the main part of the valve body.
6. double-sealing face valve as claimed in claim 5, it is characterised in that from valve inlet to valve export, the valve chamber according to
Secondary to be divided into snout cavity, lumen and outlet plenum, the lumen is at least located at the outlet in the connected region of itself and the outlet plenum
The top of chamber, the valve seat are mounted between the lumen and the outlet plenum.
7. double-sealing face valve as claimed in claim 6, it is characterised in that the throat bushing of tubular is equipped in the lumen, it is described
The lateral surface of first flap and the inner wall of the throat bushing are slidably matched, and the lower part of the throat bushing is equipped with marking shape window.
8. the double-sealing face valve as described in claim 5-7 is any, it is characterised in that first flap is equipped with secondary valve and is situated between
Matter channel and secondary valve sealing pair, the pair valve medium channel include the center through hole of first flap, first flap
Center through hole is in axial, and using up big and down small multistage non-uniform structure, the pair valve sealing pair includes auxiliary-seat and secondary flap,
The auxiliary-seat is arranged between the upper section and middle section of the center through hole of first flap, and secondary flap setting is described the
In the upper section of the center through hole of one flap, be slidably matched with the upper section of the center through hole of first flap, the auxiliary-seat and
Mutually matched sealing surface is equipped between secondary flap, the lower end of the valve rod and secondary flap rotation connect, and are achieved in
With the connection of the spool, first flap is equipped with for limiting pan position in the secondary flap maximum.
9. double-sealing face valve as claimed in claim 8, it is characterised in that set between first flap and the secondary flap
There is the secondary flap thrust spring for pushing up secondary flap relative to the first flap.
10. application of the double-sealing face valve as bypass valve as described in claim 5-9, is especially used in turbine by-pass
Bypass valve is used as on the bypass duct of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660172.4A CN110274041A (en) | 2019-07-22 | 2019-07-22 | Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660172.4A CN110274041A (en) | 2019-07-22 | 2019-07-22 | Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110274041A true CN110274041A (en) | 2019-09-24 |
Family
ID=67965008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910660172.4A Pending CN110274041A (en) | 2019-07-22 | 2019-07-22 | Double-sealing face valve seal pair, double-sealing face valve and the application as bypass valve |
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| Country | Link |
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| CN (1) | CN110274041A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726000A (en) * | 2019-09-25 | 2020-01-24 | 江苏辰龙阀门制造有限公司 | High-temperature steam valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196242A (en) * | 2007-12-29 | 2008-06-11 | 株洲南方阀门股份有限公司 | Quick service type dual-sealing checking-valve |
| CN205173517U (en) * | 2015-12-03 | 2016-04-20 | 德科隆（无锡）流体控制有限公司 | Dual seal stop valve |
| CN206874825U (en) * | 2017-06-16 | 2018-01-12 | 哈尔滨松林电站设备有限公司 | Protection against erosion bypass valve |
| CN108561572A (en) * | 2018-06-03 | 2018-09-21 | 哈电集团哈尔滨电站阀门有限公司 | New triple sealing scouring-proof stop valve |
| CN210265931U (en) * | 2019-07-22 | 2020-04-07 | 哈尔滨松林电站设备有限公司 | Double-sealing-surface valve sealing pair, double-sealing-surface valve and steam turbine bypass system |
-
2019
- 2019-07-22 CN CN201910660172.4A patent/CN110274041A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196242A (en) * | 2007-12-29 | 2008-06-11 | 株洲南方阀门股份有限公司 | Quick service type dual-sealing checking-valve |
| CN205173517U (en) * | 2015-12-03 | 2016-04-20 | 德科隆（无锡）流体控制有限公司 | Dual seal stop valve |
| CN206874825U (en) * | 2017-06-16 | 2018-01-12 | 哈尔滨松林电站设备有限公司 | Protection against erosion bypass valve |
| CN108561572A (en) * | 2018-06-03 | 2018-09-21 | 哈电集团哈尔滨电站阀门有限公司 | New triple sealing scouring-proof stop valve |
| CN210265931U (en) * | 2019-07-22 | 2020-04-07 | 哈尔滨松林电站设备有限公司 | Double-sealing-surface valve sealing pair, double-sealing-surface valve and steam turbine bypass system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726000A (en) * | 2019-09-25 | 2020-01-24 | 江苏辰龙阀门制造有限公司 | High-temperature steam valve |
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