CN106415087B - The seal construction of butterfly valve - Google Patents

The seal construction of butterfly valve Download PDF

Info

Publication number
CN106415087B
CN106415087B CN201580017251.3A CN201580017251A CN106415087B CN 106415087 B CN106415087 B CN 106415087B CN 201580017251 A CN201580017251 A CN 201580017251A CN 106415087 B CN106415087 B CN 106415087B
Authority
CN
China
Prior art keywords
valve
disc
mentioned
internal diameter
seat bush
Prior art date
Application number
CN201580017251.3A
Other languages
Chinese (zh)
Other versions
CN106415087A (en
Inventor
邱明平
Original Assignee
株式会社开滋
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2014068084 priority Critical
Priority to JP2014068083 priority
Priority to JP2014-068083 priority
Priority to JP2014-068084 priority
Application filed by 株式会社开滋 filed Critical 株式会社开滋
Priority to PCT/JP2015/059448 priority patent/WO2015147197A1/en
Publication of CN106415087A publication Critical patent/CN106415087A/en
Application granted granted Critical
Publication of CN106415087B publication Critical patent/CN106415087B/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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 with pivoted closure-members
    • F16K1/18Lift 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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift 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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226Shaping or arrangements of the sealing
    • F16K1/2263Shaping or arrangements of the sealing the sealing being arranged on the valve seat
    • F16K1/2266Shaping or arrangements of the sealing the sealing being arranged on the valve seat and being forced into sealing contact with the valve member by a spring or a spring-like member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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 with pivoted closure-members
    • F16K1/18Lift 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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift 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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226Shaping or arrangements of the sealing
    • F16K1/2261Shaping or arrangements of the sealing the sealing being arranged on the valve member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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 with pivoted closure-members
    • F16K1/18Lift 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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift 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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226Shaping or arrangements of the sealing
    • F16K1/2263Shaping or arrangements of the sealing the sealing being arranged on the valve seat
    • F16K1/2265Shaping or arrangements of the sealing the sealing being arranged on the valve seat with a channel- or U-shaped seal covering a central body portion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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 with pivoted closure-members
    • F16K1/18Lift 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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift 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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226Shaping or arrangements of the sealing
    • F16K1/2268Sealing means for the axis of rotation

Abstract

Inhibit to make the power of resin-lined layer deformation while a kind of leakproofness near the raising valve wing is provided, when valve closing operate and prevent the rising of operation torque, also can be on one side with the lower seal construction for operating the butterfly valve that while torque ensures leakproofness is openinged and closing operations in the case where increasing the thickness of resin-lined layer.In valve disc(2)Surface and valve body(3)Inner peripheral surface on the liner layer being made of resin material is respectively set(10), when by valve rod(5)When rotation process, at least by valve alar part(20)With valve body(3)Inner circumferential sealing surface(21)Crimping sealing, valve seat bush(11)Internal diameter set as follows:In valve opening in support rubber(4)Elastic force under be deformed into and compare valve disc(2)Outer diameter(D1)Small internal diameter(d2), on the other hand, the valve disc in valve closing(2)It pushes, becomes in support rubber(4)Elastic force under to path deform before internal diameter(d1), by the internal diameter before the deformation(d1)It is set as and valve disc outer diameter(D1)It is identical or more slightly larger than valve disc outer diameter.

Description

The seal construction of butterfly valve
Technical field
The present invention relates to the seal constructions of butterfly valve, more particularly to are implemented to valve body and clack box inner peripheral surface resin-lined Seal construction near the valve wing of butterfly valve and the sealing of clack box.
Background technology
Butterfly valve is to be ensured by being formed in the boss portion of the root of the stem shaft of valve body and the boss portion contact surface of seat ring Leakproofness near stem shaft dress portion is ensured by the valve wing peripheral surface of valve body and the valve wing contact surface of seat ring than stem shaft dress portion By the seal construction of the circumferential surface leakproofness of valve flank.By such butterfly valve in basic industry or the factory of semiconductor manufacturing Middle use and in the case of so that highly corrosive fluid is flowed through or used in chemical fluids, liquid, solvent, food such as chlorine or hydrochloric acid In the case of in associated flow path etc., it is more that valve body and clack box inner peripheral surface to fluid contact implement resin-lined situation.Make For the resin-lined part, usually using chemical resistance or the good fluororesin of heat resistance, but since fluororesin lacks flexibility, so It is possible that the circumferential surface leakproofness of valve flank declines and seat leakage occurs.So the sealing of the valve flank in order to improve butterfly valve Property, usually propose by the circle of rubber system be disposed in resin-lined part back side, using the rubber system circle elastic repulsive force more Elastic force near the benefit valve wing is insufficient and improves the butterfly valve of leakproofness.
As this butterfly valve, such as disclose the butterfly valve of patent document 1.In the butterfly valve, as clack box The resin-lined layer being made of the seat ring of fluororesin is set on the inner surface of valve body, between the seat ring and valve body Folder inserts the bracing ring of rubber system, plays elastic force in sealing by the bracing ring and ensures the leakproofness between valve body.It is being arranged In the case of the seal construction of such butterfly valve, attaching bracing ring in the groove on being formed in valve body, via the support Seat ring is installed on valve body by circle, then, in attaching and is installed valve body via valve rod on the valve body of the seat ring.
In the butterfly valve, if making valve body rotation push the valve flank of valve body to seat ring by valve rod operation, Then the seat ring is compressed together with bracing ring to the outer direction on one side, one side and valve seal.
Same technology is also disclosed that in patent document 2.In the butterfly valve, the half of the outer peripheral edge for making valve body is described Diameter is set to the radius phase with the inner peripheral surface of the valve seat fastened radially by the elastomeric element being made of rubber of annular etc. Deng or it is more slightly larger than the radius of the inner peripheral surface of valve seat.
Patent document 1:Japanese Unexamined Patent Publication 2003-166654 bulletins.
Patent document 2:Japanese Unexamined Patent Publication 2012-219819 bulletins.
But in the butterfly valve of patent document 1, due to when valve closing is sealed in addition to resist bracing ring elastic force power with The power for compressing seat ring itself is also needed to outside, so bringing the rising of operation torque.In the case, if inhibiting seat ring Compression, then can reduce operation torque while ensuring leakproofness, but not on the books and imply and such be used for inhibiting The shape and construction of the compression of seat ring.In turn, in valve closing for make seat ring compress power with seat ring thickness become It becomes much larger greatly, the problem for having operation torque further up.Therefore, in this butterfly valve, it is also difficult to set seat ring It counts thicker and chemical resistance and heat resistance is made to improve.
On the other hand, it in the butterfly valve of patent document 2, is equivalent to since the radius of the inner peripheral surface of valve seat indicates that attaching The size of the state of the elastomeric element of bracing ring(With reference to Fig. 2 of patent document 2), so when valve closing seals, with patent document 1 The case where it is same, in addition to resist bracing ring elastic force power other than, it is also necessary to by seat ring itself compress power.
In addition, patent document 1,2 is all since bracing ring is its thickness flat pattern smaller than width dimensions, thus with The opening and closing of valve and by bracing ring, swimmingly undergauge or expanding aspect need to be improved.
Invention content
The present invention develops to solve conventional problems, a kind of especially near the raising valve wing the purpose is to provide Leakproofness while, when valve closing operates inhibit the power of resin-lined layer compression is prevented operation torque rising, increasing It can also be opened while ensuring leakproofness with certain lower operation torque in the case of adding the thickness of the resin-lined layer The seal construction of the butterfly valve of closed operation.
In order to achieve the above object, the invention in relation to technical solution 1 is a kind of seal construction of butterfly valve, on valve disc surface Be respectively set the liner layer being made of resin material on the inner peripheral surface for the valve body that can rotate the ground axle suspension valve disc, and The valve shaft hole axis dress valve rod being located at the diametric(al) opposed locations as the valve seat bush of valve body sidelining layer, when by the valve Bar rotation process is sealed in up to the valve alar part crimping of major general's valve disc on valve body inner peripheral surface, and in inner circumferential side, support rubber in attaching Valve seat bush is covered on the inner peripheral surface of valve body, the internal diameter of the valve seat bush becomes in valve opening under the elastic force effect of support rubber Shape is that the internal diameter of path is comparably with the outer diameter of valve disc, and on the other hand, the internal diameter of valve seat bush when valve closing is set as valve disc will Valve seat bush is pushed to the internal diameter before path deformation under the elastic force effect of support rubber, and the internal diameter before the deformation is set as Including tolerance is identical as valve disc outer diameter.
Invention in relation to technical solution 2 is a kind of seal construction of butterfly valve, by will support the thickness of rubber be set as with The width dimensions of the support rubber are substantially with size or slightly longer than the width dimensions of the support rubber, are easy valve seat in valve closing The internal diameter of bushing is restored to the internal diameter before deformation.
Invention in relation to technical solution 3 is a kind of seal construction of butterfly valve, when in valve closing by the internal diameter of valve seat bush When being restored to the internal diameter before deformation, valve is located at by supporting the protrusion that rubber swells in the direction of the width with expanding to be received into In clearance portion between body and valve seat bush.
Invention in relation to technical solution 4 is a kind of seal construction of butterfly valve, and the width of rubber will be supported to be set as and valve disc The roughly the same size of valve wing difference.
Invention in relation to technical solution 5 is a kind of seal construction of butterfly valve, and liner layer is fluororesin.
Invention in relation to technical solution 6 is a kind of seal construction of butterfly valve, in the valve disc as valve disc sidelining layer The conical surface of the two surface sides setting predetermined angular of the valve flank end of lining, forms between these conical surfaces and crimps sealing with valve seat bush Sealing, the width of the sealing is set as the size roughly the same with the width of arbor end side of valve disc.
According to the invention in relation to technical solution 1, the internal diameter of valve seat bush is restored in valve opening under the elastic force of support rubber To be deformed into the internal diameter for being comparably path with the outer diameter of valve disc, in valve closing for valve disc push and support rubber elastic force under to Internal diameter before path deformation, by the way that the internal diameter before the deformation is set as identical as valve disc outer diameter(Including tolerance), grasped in valve closing The power of resin-lined layer compression need not can be prevented the rising of operation torque when making.Also, increasing resin-lined layer Thickness in the case of, can not also apply and operate the power of the liner layer compression as valve closing sealing state, so can be with Certain lower operation torque is easy to carry out opening and closing operations.
According to the invention in relation to technical solution 2, by the way that the thickness of rubber will be supported to be set as and the substantially same size of width dimensions Or it is slightly longer than the width dimensions of the support rubber, radial deformation leeway becomes larger, due to by the bracing ring with the opening and closing of valve and Swimmingly undergauge or expanding, the internal diameter of valve seat bush are easily restored to the internal diameter before deformation, so operation torque can be prevented Rising.
It is sent out according to the invention in relation to technical solution 3 by the way that the protrusion of expanding support rubber to be received into clearance portion Impartial pushing sealing force is waved, is able to maintain that inexcessive sealing state.
According to the invention in relation to technical solution 4, valve seat lining when can ensure valve closing in the range equipped with support rubber It covers the leakproofness with valve disc and is reliably prevented seat leakage, even the case where valve disc is not fully rotated into closed state, Also the error is absorbed and plays higher leakproofness.
According to the invention in relation to technical solution 5, by making liner layer be fluororesin, chemical resistance and heat-resisting can improved Property while operation torque when operating valve closing inhibit relatively low, coming because of the band of valve disc for the liner layer can be inhibited It wears and deteriorates and improve durability.
According to the invention in relation to technical solution 6, when valve closing is sealed from arbor to as the sealing surface with valve seat bush Valve disc liner substantially uniformly transmits pushing force, while playing good torque by uniform face pressure sealing force, makes valve The leakproofness of alar part and valve body inner peripheral surface gets higher and is reliably prevented seat leakage.
Description of the drawings
Fig. 1 is the stereogram of the part excision of butterfly valve.
Fig. 2 is the central longitudinal section view of the butterfly valve of Fig. 1.
Fig. 3 is the central horizontal magnification sectional view of the butterfly valve of Fig. 1.
Fig. 4 is the central longitudinal section view of the butterfly valve of Fig. 2.
Fig. 5 is the main enlarged view of a portion of Fig. 4.
Fig. 6 is that section view is omitted in the part of the attaching state of the valve seat bush in the central horizontal magnification sectional view for indicate Fig. 3 Figure.
Fig. 7 is the sectional view for the state for indicating the valve disc rotation in Fig. 3.
Fig. 8 is the enlarged partial cross section indicated near the valve alar part of valve disc.
Fig. 9 is the sectional view for indicating valve seat bush.
Figure 10 is the central transverse sectional view for the comparative example for indicating butterfly valve.
Figure 11(a)It is the stereogram for indicating valve seat bush.Figure 11(b)It is the longitudinal section view of valve seat bush.
Figure 12(a)It is the stereogram for indicating valve disc.Figure 12(b)It is the longitudinal section view of valve disc.
Figure 13 is the sectional view for the state for indicating that valve seat bush is made to deform.
Figure 14 is the A-A sectional views of Figure 13.
Figure 15(a)It is the stereogram for the valve seat bush that valve disc in attaching.Figure 15(b)It is the valve seat bush that valve disc in attaching Longitudinal section view.
Figure 16(a)It is the stereogram for the valve seat bush that valve rod in attaching.Figure 16(b)It is the valve seat bush that valve rod in attaching Longitudinal section view.
Figure 17 is the side view for indicating support rubber.
Reference sign
1 valve body
2 valve discs
3 valve bodies
4 support rubber
5 valve rods
10 liner layers
11 valve seat bush
12 valve disc liners
The inclined surface 12a
The 12b conical surfaces
12c sealings
13 valve shaft holes
20 valve alar parts
φ D1 valve disc outer diameters
The internal diameter of valve seat bush when φ d2 valve opening
The internal diameter of valve seat bush when φ d1 valve closing
L supports the width of rubber
S valve wing differences
The width of Wa sealings
The width of the arbor end side of Wb valve discs.
Specific implementation mode
Hereinafter, explaining the preferred embodiment and its work of the seal construction of the butterfly valve of the present invention in detail based on attached drawing With.In Fig. 1, Fig. 2, indicate that an example of the butterfly valve of the seal construction using the present invention indicates the butterfly valve of Fig. 1 in figure 3 Central horizontal magnification sectional view.Hereinafter, illustrating while the size example for the butterfly valve for indicating nominal diameter 100A.
The butterfly valve of Fig. 1(Hereinafter referred to as valve body 1)Such as it is used in semiconductor manufacturing factory or the associated pipe of food In road etc..Valve body 1 has valve disc(ジスク)2, the valve body 3 of barrel shape, support rubber 4, by top valve rod 5a and lower valve The valve rod 5 that bar 5b is constituted can rotate the valve body 3 that ground axle suspension valve disc 2 on the surface of valve disc 2 and via support rubber 4 Inner circumferential side, equipped with the liner layer 10 being made of valve seat bush 11, valve disc liner 12.
As shown in figure 5, in valve body 1, in the valve shaft hole 13 being located at the diametric(al) opposed locations of valve seat bush 11 Axis fills valve rod 5, near the stem shaft dress portion 14, in the rotation process of valve rod 5 by being located at 15 He of boss portion of 2 side of valve disc It is located at the sealing respectively up and down by valve disc 2 of boss portion sealing surface 16 of 3 side of valve body, it is ensured that so-called upper-lower seal(It is primary close Envelope)Leakproofness.In the inner circumferential side of valve body 1, as shown in figure 3, by will be careful in the valve alar part 20 of valve disc 2 and valve body 3 Cover 21 crimps sealing in a circumferential direction, it is ensured that the circumferential surface leakproofness of 20 side of valve alar part prevents seat leakage.
In Fig. 1~Fig. 5, the valve disc 2 of valve body 1 has arbor(Core gold)22, the arbor 22 is for example with stainless steel alloy Be formed as discoid for material.It is covered with above-mentioned valve disc liner 12, the valve disc on arbor 22, such as with the thickness of 3mm or so It is the liner layer 10 for connecing liquid level side that liner 12, which becomes 2 surface of valve disc,.Valve disc liner 12 is made of resin material, in present embodiment In, by PFA(Tetrafluoroethene-perfluorinated alkoxy vinyl ether copolymer)Equal fluororesin setting, can play higher corrosion-resistant Property and heat resistance.Through hole 23 of the valve disc liner 12 through the formation of the appropriate position of arbor 22 is integrally covered in the arbor On the outside of 22 positive and negative, the disengaging from arbor 22 is prevented.
As shown in Fig. 2, Fig. 4, Fig. 5, valve disc 2 up and down, then aftermentioned liner cylindrical portion 26, as valve rod hole portion shape At the polygon hole portion 24 for having the hexagon shape for being inserted into top and the bottom valve rod 5a, 5b.In valve rod hole portion 24, it is inserted into respectively embedding The polygonal portion for the hexagon shape that each end side in top and the bottom valve rod 5a, 5b is formed as interconnecting piece 25 is closed, as a result, valve disc 2 are mounted in by rotatably axis in valve body 3 via these top and the bottom valve rod 5a, 5b.By such installation constitution, top and the bottom valve Bar 5a, 5b can be arranged in which plug off relative to the valve disc 2 being installed on valve body 3.The valve rod hole portion 24 of 2 side of valve disc, top and the bottom valve Can also be the multilateral shape other than hexagon shape as long as the interconnecting piece 25 of the sides bar 5a, 5b can be mutually fitted into, for example, can be with It is located in the various inserted structures that two sides opposite side or quadrangle axis, spline connection etc. can decompose top and the bottom valve rod and valve disc.
In Fig. 4, Fig. 5, above and below as valve disc 2, the insertion side of top and the bottom valve rod 5a, 5b of valve disc liner 12, with Liner cylindrical portion 26 is integrally formed in the valve disc liner 12.By the liner cylindrical portion 26 by the connecting side of top and the bottom valve rod 5a, 5b It covers in the axial direction.
As shown in the enlarged partial cross section of Fig. 8, in two surface sides of valve disc liner 12, from the center side of valve disc 2 to end Side nearby be equipped with inclined surface 12a, then inclined surface 12a and 20 side end of valve alar part with predetermined angular be equipped with conical surface 12b.? Between the conical surface 12b of two surface sides, it is formed with sealing 12c in vertical direction in figure, sealing 12c can in valve closing Crimping is sealed on valve seat bush 11.
In the present embodiment, conical surface 12b from inclined surface 12a being obliquely installed with inclination angle alpha, the inclination angle alpha quilt It is set as 20 °.In the case, by being set as 45 ° from the inclination angle beta of vertical surface side, the width Wa and arbor of sealing 12c The width Wb of 22 terminal part 22a is set as roughly the same width W.For example, being 3mm in the width Wb of the end side of arbor 22 In the case of, the width Wa of sealing is set to 3mm, and it is the structure of width Wa=width Wb to make valve disc end side in this way Make, the terminal part 22a of the power arbor 22 that sealing 12c can be subject to by the pushing with valve seat bush 11 with sealing The identical width of 12c is born, and prevents the decline of the sealing face pressure at the position, setting from having both standby higher torque in valve closing It can be with the seal construction of leakproofness.Form the outer diameter φ D1 of the valve disc 2 of above-mentioned valve disc liner 12(With reference to Fig. 3)In this embodiment party The outer diameter of φ 100mm is set as in formula.
As shown in Figure 1 and Figure 2, the valve body 3 of the above-mentioned valve disc of attaching 2 is made of top valve body 3a, lower part valve body 3b, their examples It is such as shaped by malleable cast iron cast iron, mutually can removably be fixed by bolt 27.5 axis of valve rod of valve body 3a, 3b in top and the bottom It fills side and is equipped with axis dress hole 28,28, distinguish attaching top and the bottom valve rod 5a, 5b in these each axis dress holes 28.Then the axis fills hole 28, Attaching recess portion 29,29 of the side equipped with expanding shape is kept in valve disc 2, it is interior as shaft sealing part 17 via the attaching recess portion 29 Fill seal sleeve 30, seal member 31, disc spring 32, board member 33, also attaching bearing 34.
In top and the bottom, the circumferential surface sealed sides of the valve alar part 20 of valve body 3a, 3b, are formed as attaching slot 35 with the width of 10mm Than the depth for supporting the thickness of rubber 4 shallow, removably attaching rubber 4 can be supported in the attaching slot 35.In top and the bottom valve body The both sides of 3a, 3b, equipped with the bolt hole 36 that can will be fixedly connected with each other by bolt 27.
Valve seat bush 11 shown in Fig. 9, for example with the wall thickness of 3mm by the covering of valve body 3 and attaching, is somebody's turn to do in the inner circumferential side of valve body 3 Valve seat bush 11 becomes the liner layer 10 for connecing liquid level side.Valve seat bush 11 is made of resin material, in the present embodiment, with valve The case where disk liner 12, is same, is arranged with fluororesin such as PFA.Valve seat bush 11 has the annulus for being installed in valve body inner circumferential side 40 and the flange part 41 being formed on the both ends outer peripheral edge of the annulus 40 is projected, the valve rod 5 in the top and the bottom of annulus 40 Axis charging tube part 42,42 is formed at attachment positions, can be inserted into respectively in the axis charging tube part 42 be equipped with top and the bottom valve rod 5a, 5b。
The axis of top and the bottom valve rod 5a, 5b and valve disc 2 in the inner circumferential of annulus 40 fill side, and direction is filled in the axis of valve rod 5 On project and be formed with above-mentioned boss portion sealing surface 16, in a circumferential direction, across the boss portion sealing surface 16 in valve alar part 20 The side that sealing 12c is abutted is formed with the above-mentioned inner circumferential sealing surface 21 of arc-shaped.
Inner circumferential sealing surface 21 is the plane parallel with flow path shaft core direction, in addition, the sealing 12c of valve disc 2 is formed as making For the R shapes with disk-shaped valve disc 2 with a part for the spherical surface of wick-like.It is made of these inner circumferential sealing surfaces 21 and sealing 12c Valve base sealing be the contact area at two positions be more carefully linear so-called " linear sealing ", so friction is small, be conducive to by The rising of operation torque when valve closing inhibits relatively low.
The inner circumferential sealing surface 21 of present embodiment is set as, and it is φ to make the internal diameter φ d1 that the track is formed by Fig. 6 100mm, the width L of inner circumferential sealing surface 21 is in Fig. 6(b)In be set to 10mm.The back side of all sealing surfaces 21 inside, with valve It is equipped support rubber 4 between body 3, is pushed away the inner circumferential sealing surface 21 of valve seat bush 11 to the direction of undergauge from the support rubber 4 Pressure.
Two support rubber 4,4 in left and right shown in Fig. 3 for example are formed to be attached in attaching slot 35 by fluorubber Width and length dimension are separately equipped with the left and right sides in valve body 3 in a manner of clipping seal sleeve 30 in fig. 2.In the figure 7, Support rubber 4 is set as the width of the size roughly the same with the valve wing difference S of valve disc 2, be set as in valve wing sealed sides Length roughly the same the width L of all sealing surfaces 21.In Fig. 6(b)In, support the thickness T of rubber 4 to be set as identical as width L Size, width L and thickness T in present embodiment are set as 10mm or so.Here, valve wing difference S expressions can be by valve disc 2 The inclined limiting value for carrying out the valve alar part 20 of valve closing sealing, according to 20 end of valve alar part from the end face of valve body 3 to one end Length S1 and the difference of the length S2 of 20 end of valve alar part from the end face of valve body 3 to another side find out.
It supports the thickness T of rubber 4 by being set as size identical with width L as described above, certain is crushed Rate ensures broken surplus appropriate.If in the case where thickness T is relatively thin due to the deviation of size percentage of damage amplitude of fluctuation Become larger, it is higher that operation torque when valve closing steeply rises or close the possibility deteriorated.
On the other hand, if thickness T is blocked up, in the size limitation that the maximum outside diameter and minimum outer diameter of valve body 3 are piped Under conditions of attaching slot 35 must be set as deeper size, it is possible to cannot ensure for meeting valve body compressive resistance most Small wall thickness.In addition, if blocked up, then become larger by the influence that thermal expansion is brought, operation torque when valve closing is possible to steeply rise.
Thus, it supports the thickness T of rubber that can be set in the range of 0.9L≤T≤1.1L, is preferably set as T=L Or T≤1.1L.
In this way, the thickness T of rubber 4 will be supported to be set as with the size of the width L of support rubber 4 substantially with size or slightly It is long, by using the support rubber 4 of the narrower width compared with the support rubber 4 of flat pattern as the prior art, expanding change It must be easy, the internal diameter of valve seat bush 11 is restored to the internal diameter before above-mentioned deformation by being easy in valve closing, can prevent from operating The rising of torque.
The inner circumferential size x of rubber 4 is supported to be formed as and be equivalent to the central diameter of attaching slot 35 shown in Fig. 2 shown in Figure 17 The substantially same sizes of arc length y.The end 4a of rubber 4 is supported to be cut by oblique so that its whole face can be closely contacted on seal sleeve On 30 peripheral surface.By these structures, be attached to support rubber 4 in attaching slot 35 will not local relaxing, can be by valve The back side of the inner circumferential sealing surface 21 of seat pad set 11 equably pushes.
Here, in order to indicate the feature of seal construction of the invention, it is divided into 3 states and illustrates.
Such as Fig. 6(a)It is shown, if valve seat bush 11 is mounted in the state that no attaching supports rubber 4, valve disc 2 In the case of on valve body 3, i.e., under the formation state of valve seat bush 11, the internal diameter φ d1 of the inner circumferential sealing surface 21 of valve seat bush 11 It is set to φ 100mm identical with valve disc outer diameter φ D1.
At this point, in the figure, the distance HA from the bottom surface of attaching slot 35 to inner circumferential sealing surface 21 is about 11.7mm, from dress The distance HB at the bottom surface of access slot 35 to the back side of inner circumferential sealing surface 21 is about 8.7mm.Thus, the inner circumferential sealing surface of valve seat bush 21 wall thickness is 3mm.In this case, clearance portion G ' is equipped between valve body 3 and valve seat bush 11.The clearance portion G ' is in valve closing Shi Chengwei is by the aftermentioned protrusion 37 in the Inner peripheral portions of the support rubber 4 pushed via valve seat bush 11 by valve disc 2 at it The space of adjacent position storage.
Such as Fig. 6(b)It is shown, if the valve seat bush 11 equipped with support rubber 4 is mounted on valve in no attaching valve disc 2 In the case of on body 3, by the elastic force of support rubber 4,11 necking deformation of valve seat bush, the internal diameter of the inner circumferential sealing surface 21, i.e. The internal diameter φ d2 in high portion 45 are φ 97.4 from φ 100mm undergauges in the sealing 12c crimping sealings of so-called valve disc 2.This When, it is 13mm that the distance HA1 from the bottom surface of attaching slot 35 to inner circumferential sealing surface 21 changes from 11.7mm, but valve seat bush 11 is interior The wall thickness of all sealing surfaces 21 maintains 3mm.
In addition, when that rubber 4 will be supported to be installed on valve body 3, since the depth of attaching slot 35 as described above is than the branch The thickness T for supportting rubber 4 is shallow, so support rubber 4 is to the inner circumferential sealing surface with valve seat bush 11 under the state outstanding of inner circumferential side 21 back side abuts, and clearance portion G is equipped between the valve seat bush 11 and valve body 3.That is, clearance portion G is for above-mentioned clearance portion G ' valve seat bush 11 of undergauge is added for being restored to Fig. 6(a)State space.
In figure 3, the valve body 1 that valve disc 2 is installed on the valve body 3 of valve seat bush 11 is being equipped with via support rubber 4 In the case of, it is different with the internal diameter of valve seat bush when valve closing 11 in valve opening according to the rotation status of valve disc 2.In valve opening, pass through It is deformed to hole shrinkage direction under the elastic force of support rubber 4, the internal diameter in high portion 45 is deformed into as described above in valve seat bush 11 It is smaller than valve disc outer diameter φ D1, become Fig. 6(b)State internal diameter φ 97.4mm.On the other hand, when valve closing shown in Fig. 3, lead to It crosses valve disc 2 and resists the elastic force of support rubber 4 and carry out urging valve seat bushing 11, the internal diameter in high portion 45 passes through valve disc in valve seat bush 11 Pushing and be restored to the internal diameter before deformation, the internal diameter φ d1 before the deformation are and Fig. 6(a)The identical valve disc outer diameter φ of state The identical φ 100mm of D1.At this point, the distance HA from the bottom surface of attaching slot 35 to inner circumferential sealing surface 21 is about 11.7mm, from dress The distance HB at 35 bottom surface of access slot to the back side of inner circumferential sealing surface 21 is about 8.7mm.Thus, the inner circumferential sealing surface of valve seat bush 11 Wall thickness 3mm on 21 is maintained.
In this way, the 2 urging valve seat bushing 11 of valve disc in valve closing, when carrying out valve base sealing, high portion in valve seat bush 11 45(Inner circumferential sealing surface 21)Simply return to no attaching support rubber 4 state, i.e. the formation of valve seat bush 11 when size, and It is not compressed, so not remaining permanent strain on valve seat bush 11 and keeping good inner circumferential sealing surface 21, can continue to grow Phase maintains higher seat leakage.
Also, the torque needed when valve closing operates only from make support rubber 4 to the power of expanding direction flexible deformation generate, So operation torque is substantially reduced, the operation torque for maintaining the reduction for a long time can be continued.
Also, these features do not depend on the wall thickness of valve seat bush 11, such as wall thickness is made to thicken to 4mm or so or such as Fruit be more than that wall thickness is then set as within 5mm by the larger butterfly valve of bore of nominal diameter 125A, be also able to maintain that higher Seat leakage, low torque.
In the circumferential surface sealing position formed by the valve alar part 20 of above-mentioned valve disc 2 and the inner circumferential sealing surface 21 of valve body 3, in Fig. 7 In, in the case where making valve disc 2 be rotated from closed state to valve opening side, in the range that the valve disc 2 is rotated with valve wing difference S(It is equipped with The range in middle high portion 45)It is interior, by supporting rubber 4 to be formed as broad-ruler identical with the inner circumferential sealing surface 21 as described above It is very little, play the elastic force of the support rubber 4, it is ensured that high leakproofness.It is also same as the above situation in the range of valve wing difference S Prevent the compression of valve seat bush 11, it is ensured that leakproofness and operation torque.
In the case of which kind of valve closing seals, when the internal diameter before the interior radial deformation of valve seat bush 11 is answered in valve closing When former, the protrusion 37 that is swelled in the direction of the width with expanding of support rubber 4 all deforms flat to being located at valve body 3 and valve to squeeze In clearance portion G ' between seat pad set 11, by clearance portion G ' storages.Therefore, the circumferential pushing sealing force for playing equalization is spread, It is able to maintain that inexcessive sealing state.
Here, it indicates to be used for the comparative example compared with the seal construction of the butterfly valve of the present invention in Fig. 10.The valve seat serves as a contrast Set 50 is in Figure 10(a)In if in the case where being mounted on valve body 3 with the state of no attaching support rubber 4, valve disc 2, if It is 10mm for the distance HC from the bottom surface of attaching slot 35 to the back side of inner circumferential sealing surface 51, the internal diameter φ dA1 of inner circumferential sealing surface 51 For shape as φ 97.4mm.Even if as a result, in attaching slot 35 attaching thickness 10mm support rubber 4, will not be from this Rubber 4 is supported to apply the power of hole shrinkage direction.
In Figure 10(b)In, in the case where the valve seat bush 50 to be mounted on via support rubber 4 on valve body 3, by branch The elastic force of rubber 4 is supportted, 50 necking deformation of valve seat bush, the internal diameter of inner circumferential sealing surface 51 is by undergauge.Also, it is filled on valve body 3 Valve disc 2 is connect, in valve opening, the internal diameter φ dA2 ratio φ 97.4mm undergauges of inner circumferential sealing surface 51 is made to pass through valve disc 2 in valve closing It pushes, the size of valve disc outer diameter φ D1 arrives φ 100mm by expanding.
In this way, the feelings of the internal diameter φ dA1 valve seat bush 50 smaller than valve disc outer diameter φ D1 before the deformation brought by valve disc 2 Under condition, when the rotation of valve disc 2 becomes closed valve state, other than the pushing deformation of support rubber 4, there is additionally required makes valve seat serve as a contrast The power that set 50 compresses, that is, reduces the thickness of valve seat bush 50 and make its flexible deformation.Also, as the valve seat bush 50 thickens, The power of compression also becomes larger, proportional to the thickness of valve seat bush 50, and operation torque also increases.But due in operation torque There is the limit allowed, so being difficult to for the thickness of valve seat bush 50 to be set as the size of some degree or more.On the other hand, if Keep the thickness of valve seat bush 50 thinning, then because resistance to through performance declines, so being difficult to meet the chemical resistance of needs and heat resistance.
In addition, surveying the butterfly valve of the nominal diameter 100A of present embodiment and being equivalent to the identical nominal diameter of Figure 10 Butterfly valve valve closing operation when torque capacity after confirm, the butterfly valve of present embodiment is relative to being equivalent to the identical of Figure 10 The butterfly valve of nominal diameter can realize that about 23% torque reduces.
Then, in the axle envelope sealing position of the valve rod 5 of valve seat bush 50, such as Fig. 9(b)It is shown to set at a proper angle like that The periphery conical surface 60 for setting the periphery end of each axis charging tube part 42, by the periphery conical surface 60, axis charging tube part 42 is formed as chock shape, The base portion 64 of the axis charging tube part 42 is set as than 60 wall thickness of the periphery conical surface.In turn, the height of axis charging tube part 42 is arranged shorter. By such shape, when being applied with external force from peripheral direction on the periphery conical surface 60, only the periphery conical surface 60 nearby deforms, The deformation near root by preventing axis charging tube part 42 is formed in the inner circumferential of axis charging tube part 42 and is inserted into hole as valve rod Valve shaft hole 13 will not deform and ensure its out of roundness.
In the inner circumferential of each axis charging tube part 42, equipped with the cricoid prominent shape sealing 61 projected to inner circumferential side, the prominent shape is close Envelope portion 61 can crimp the periphery Shangdi setting for being sealed in liner cylindrical portion 26.Sealing near the prominent shape sealing 61 as a result, Power is got higher, and prevents the leakage between axis charging tube part 42 and liner cylindrical portion 26.
In the peripheral side of 42 base portion of axis charging tube part, recess is formed with ring-type groove portion 62, and axis charging tube part 42 is formed as, via this Ring-type groove portion 62 is more protrusively provided than annulus 40.By be arranged ring-type groove portion 62, the applied force on valve seat bush 11 and Make annulus 40 and flange part 41 in the case where being deformed into generally elliptical shape on the attaching direction of top and the bottom valve rod 5a, 5b, Axis charging tube part 42 is not easy to be affected by, and prevents from deforming.
It is above-mentioned as the seal sleeve 30 of shaft sealing part 17, seal member 31, disc spring 32, board member in Fig. 4, Fig. 5 33 are installed in each attaching recess portion 29 of top and the bottom valve body 3a, 3b for being covered by above-mentioned valve seat bush 11, divide in its inner circumferential It does not insert and is kept by positioning in the state of top and the bottom valve rod 5a, 5b.Bearing 34 is in the attaching recess portion with top and the bottom valve body 3a, 3b 29 eccentric positions compared, can respectively from 62 side of ring-type groove portion be located at clamping top and the bottom valve rod 5a, 5b and axis dress hole 28 it Between.By the bearing 34, the rotation of top and the bottom valve rod 5a, 5b become smooth.
Disc spring 32 is for example arranged to the outer diameter being attached in attaching recess portion 29 by the spring steel for implementing surface treatment, It is disposed in position of the ratio seal sleeve 30 of attaching recess portion 29 by centrifuging side.Between disc spring 32 and seal sleeve 30, such as by Stainless steel is equipped with flat annular plate component 33, and via the board member 33, the pushing force of disc spring 32 is by seal sleeve 30 Upper surface side Transmit evenly, above-mentioned upper-lower seal(Once sealing)It functions.
Seal sleeve 30 is for example by carbon containing PTFE(Polytetrafluoroethylene (PTFE))Equal fluororesin are formed to be attached to attaching recess portion It is substantially a ring-shaped in 29, it is installed in a manner of being in direct contact with valve seat bush 11 in attaching recess portion 29.In seal sleeve 30 It is formed with the inner circumferential conical surface 63 with the inner circumferential lower side of the opposed locations of the periphery conical surface 60, these inner circumferential conical surfaces 63 and the periphery conical surface 60 It is set as identical tilt angle theta relative to vertical plane, the abutting contacted by face seals to crimp.In the present embodiment, this The tilt angle theta of a little inner circumferential conical surfaces 63 and the periphery conical surface 60 is set to 20 °, is pushed when applying from disc spring 32 to seal sleeve 30 When power, by the chock effect brought by these inner circumferential conical surfaces 63 and the periphery conical surface 60, generated on the direction of valve rod diameter by dividing The pushing force that power is brought makes axis charging tube part 42 touch with liner cylindrical portion 26 by the pushing force, by the liner cylindrical portion 26 with 5 peripheral surface of valve rod touches, sealing(Secondary seal)It functions.In turn, it can also be set in the inner circumferential side of liner cylindrical portion 26 Ring-shaped protrusion (not shown) is set, in the case, the face pressure of sealing can be improved.
The attaching seal member 31 between seal sleeve 30 and the liner cylindrical portion 26 of inner circumferential upper side.Seal member 31 by The made of metal coil spring 65 formed with corrosion-resistant metal and the composition of cricoid cover member 66 formed with fluororesin, coil Spring 65 is embedded in the cricoid attaching groove 67 being formed in cover member 66 and integrated.By the structure, sealing Part 31 is arranged to, and while making up the low elastic force of fluororesin with the elastic force of coil spring 65, can be played in radiation direction Resilient sealing force presses the elastic force with coil spring 65 in high pressure in low pressure by the elastic force of coil spring 65 by fluid, Higher sealing force is played respectively.
It is close in the periphery conical surface 60 of the inner circumferential conical surface 63 for making seal sleeve 30 and axis charging tube part 42 by the seal member 31 While connecing, 26 inner circumferential side of liner cylindrical portion is set to touch with 5 peripheral surface of valve rod, sealing(It seals three times)It functions, true Protect chemical resistance and while to the tolerance of superhigh temperature ultralow temperature, it is ensured that the dynamic when rotation of top and the bottom valve rod 5a, 5b Leakproofness.In addition, in order to ensure the position sealed three times of the seal member 31 and liner cylindrical portion 26, liner cylindrical portion is needed 26 length reaches the position, and thus the length of liner cylindrical portion 26 determines.
Its opening portion 31a of seal member 31 of present embodiment is configured towards the foreign side of valve disc 2.Even if contingency as a result, Above-mentioned once sealing, secondary seal performance decline and fluid reach seal member 31, the coil spring 65 of seal member 31 It will not be contacted with liquid and maintain sealing function three times.The configuration direction of such seal member 31 is especially rotten by metal in disposition It is effective in the case of the higher liquid of possibility of erosion.
As shown in figure 5, between seal sleeve 30 and the axis charging tube part 42 of valve seat bush 11, be formed with the 1st space part 71, 2nd space part 72.By the way that these the 1st space part 71, the 2nd space parts 72 are arranged, in attaching of the valve disc 2 to valve body 3 when in order to When improving sealing power and the fastening force of valve body 3 being made to become strong, apply stronger pushing from 12 side of valve disc liner to valve seat bush 11 Power makes the material of the liner layer 10 of deformation avoid.Specifically, the 1st space part 71 is for making the axis charging tube part 42, interior of deformation The space of cylindrical portion 26, the material evacuation of seal sleeve 30 is served as a contrast, the 2nd space part 72 is for making seal sleeve 30, the axis of deformation The space of the material evacuation of charging tube part 42.By the way that these the 1st space part 71, the 2nd space parts 72, the mutual pressure of sealing position is arranged Relay will not be raised to more than required, and higher leakproofness is played inhibiting the while of operating torque.
Due to being respectively equipped with the 1st space part 71, the 2nd space part 72 between valve seat bush 11 and seal sleeve 30, so When being applied with stronger pushing force by disc spring 32, the material of deformation avoids, and resistance when rotation is alleviated, and operation torque subtracts It is small.In turn, part injury or deformation, fracture can be prevented, remains higher close at the axle envelope sealing position of the both sides of upper and lower sides Feng Xing.
As described above, in the seal construction of valve body 1, the internal diameter of the valve seat bush 11 when valve opening is in support rubber 4 Elastic force under be deformed into than valve disc outer diameter φ D1 paths, the internal diameter φ d1 of the valve seat bush 11 when valve closing are in support rubber 4 The internal diameter being deformed under elastic force before path, by the way that the internal diameter φ d1 before the deformation are set as identical as valve disc outer diameter φ D1(Packet Containing tolerance)Or major diameter slightly than valve disc outer diameter φ D1, will not apply from the sealing of 2 periphery of valve disc when valve closing seals make valve seat The power that bushing 11 compresses, so the rising of operation torque can be prevented while ensuring high leakproofness.Also, increasing tree In the case of the thickness of fat liner layer 10, it can not also apply the power for making the liner layer 10 compress and operate as valve closing seal shape State, so opening and closing operations can be easy to carry out with certain lower operation torque.
In the case, liner layer 10 is arranged by fluororesin, thus will be closed while improving chemical resistance and heat resistance Operation torque when valve operates inhibits relatively low, can inhibit the abrasion when sealing of valve disc 2 and deterioration, improves durability.
In addition, in the present embodiment, the internal diameter φ d1 of the inner circumferential sealing surface 21 of valve seat bush 11 are set as and valve disc The identical φ 100mm of outer diameter φ D1, but have in each part the machining tolerance of ± 0.1mm or so respectively.
Thus, such as
Outer diameter φ D1 relative to valve disc 2 are φ 99.9mm, and the internal diameter φ d1 of the inner circumferential sealing surface 21 of valve seat bush 11 are φ100.1mm
Outer diameter φ D1 relative to valve disc 2 are φ 100.1mm, the internal diameter φ d1 of the inner circumferential sealing surface 21 of valve seat bush 11 For φ 99.9mm
Like that, feelings roughly the same with the outer diameter φ D1 of valve disc 2 the internal diameter φ d1 of the inner circumferential sealing surface 21 of valve seat bush 11 Shape, and valve seat bush 11 will not be by the construction of compression seal, including in the present invention when valve closing seals.
In addition, being such as φ 100mm relative to the outer diameter φ D1 of valve disc 2, the internal diameter of the inner circumferential sealing surface 21 of valve seat bush 11 Internal diameter φ d1 for such, valve seat bush 11 the inner circumferential sealing surfaces 21 of φ 102mm are bigger by 2% or so slightly than the outer diameter φ D1 of valve disc 2 The situation of slightly larger diameter, and valve seat bush 11 will not be by the construction of compression seal, including in the present invention when valve closing seals.
If the value when internal diameter φ d1 of valve seat bush 11 are the outer diameter φ D1 major diameters than valve disc 2 is more than 2%, valve seat lining The variation that set 11 is deformed into diameter before and after path under the elastic force of support rubber 4 becomes larger, and it is possible to be shown on durability Now influence.
Thus, from ensuring that, with from the viewpoint of the durability of the leakproofness of valve disc 2 and valve seat bush 11, valve seat bush 11 exists The internal diameter φ d1 before being deformed into path under the elastic force of rubber 4 are supported to be preferably roughly the same with valve disc outer diameter φ D1.This reality As long as apply the internal diameter φ d1 before the above-mentioned deformation of the valve seat bush 11 of mode be set as 99.9% relative to valve disc outer diameter φ D1~ 102%, more preferably it is set to 100%~102%.
Then, illustrate the manufacturing method of above-mentioned valve body 1.
Above-mentioned valve body 1 can be inserted into process by process deformation process, to core process, cylindrical portion, valve rod connects process, Valve body integration process, valve rod positioning process and formed.
In fig. 11, it indicates the above-mentioned valve seat bush 11 of 2 periphery side seal of valve disc shown in Figure 12 can be made first The valve seat bush 11 deforms in deforming process.
In Figure 13, Tu14Zhong, indicate to make the state that valve seat bush 11 deforms by external force, by under normal temperature state applying External force and be morphed into ellipse.Before applying the external force, as shown in figure 13, so that valve disc 2 is rotated to full-gear, connect , when an external force is applied, keep the periphery of valve seat bush 11 parallel with the flange part 41 of the valve seat bush 11, and from axis fitted tube The back side of the inner circumferential sealing surface 21 of valve seat bush 11 is clipped between the nip part 90 of vice by the direction that the shaft core in portion 42 is orthogonal It pushes, the direction for being morphed into axis charging tube part 42 is oval as long side.
In the case, it is pushed from foreign side, so as to be deformed into the length of the inner circumferential sealing surface 21 of elliptoid valve seat bush 11 Overall length R2s long of the side R1 than the liner cylindrical portion 26 including valve disc 2.
The hand that the push-press working is also used as dealer directly carries out, but it is preferred that using vice or bench vice(vice)Deng Valve seat bush can be remained to elliptoid device.Valve seat bush 11 is remained into ellipticity in this way, it is aftermentioned to core Core operation is become easy with valve disc 2 when process.
As push when to valve seat bush 11 apply power size, for be able to maintain that valve seat bush 11 elastic force shape State, specifically, as described later positive round can be restored to from ellipse or close to the state of positive round by releasing for pushing Power, the so-called range for capableing of flexible deformation.Valve seat bush 11 need not be entirely positive round before assembling, as long as being encased in valve Become round type in body 3 and after valve body 1 is set.
As described above, the periphery conical surface 60 is set by forming shorter axis charging tube part 42, on the axis charging tube part 42 And the base portion 64 of axis charging tube part 42 is made to become more thickened wall, be additionally provided with ring-type groove portion 62, when clipping valve rod with nip part 90 The deformation for preventing valve shaft hole 13 maintains its out of roundness.
Then, in core process, valve disc 2 is packed into 11 inner circumferential of valve seat bush of the state of deformation.At this point, protecting on one side Hold the position of valve disc 2 so that the axis charging tube part 42 of the shaft core and 11 side of valve seat bush of the liner cylindrical portion 26 of 2 side of valve disc shaft core Parallel and valve disc 2 is identical at a distance from the open side in upper and lower each valve shaft hole 13, and valve disc 2 is made to be moved to valve seat bush on one side 11 inner circumferentials, by liner cylindrical portion 26 and the shaft core of axis charging tube part 42 to core.In addition, at this time can also be in advance in valve shaft hole 13 It is inserted into columned fixture (not shown), is reinforced in valve shaft hole 13 from inner circumferential with the fixture.The length of the fixture is than top and the bottom valve Bar 5a, 5b are short.
After to core process, it is inserted into process, will gradually weakens to the external force of valve seat bush 11 in cylindrical portion.As a result, Valve seat bush 11 is automatically restored from ellipticity to round type under its elastic force, in fig.15, will be above and below valve disc 2 by one side Liner cylindrical portion 26 be inserted into constitute valve rod hole axis charging tube part 42 in valve disc 2 is attached on valve seat bush 11 on one side, circle Canister portion is inserted into process and is completed.The state supported as a result, by the axis charging tube part 42 of valve seat bush 11 in the liner cylindrical portion 26 of valve disc 2 Under, blocking in the state of can connect top and the bottom valve rod 5a, 5b by valve disc 2 and valve seat bush 11.Alternatively, it is also possible in valve Gap is set between the upper and lower sides and valve seat bush 11 of disk 2, passes through aftermentioned valve body integration process step combinations Fig. 5 in the gap Shown in shaft sealing part 17, thus constitute 2 upper and lower sides of valve disc sealing position.
In valve rod connects process, in figure 16, by the interconnecting piece 25 of top and the bottom valve rod 5a, 5b end side on one side by shaft core Alignment is gradually inserted into valve rod hole portion 24 on one side, these top and the bottom valve rod 5a, 5b and valve disc 2 are connected.In top and the bottom valve rod 5a, On 5b, it is equipped with conical surface portion 91 between cylindric position and the boundary part of interconnecting piece 25, upper lower valve is prevented by the conical surface portion 91 Bar 5a, 5b to valve disc 2 insertion when liner cylindrical portion 26 damage.
In these top and the bottom when the insertion of valve rod 5a, 5b, it is possible to accumulate sky in valve rod hole portion 24 with the insertion Gas, but can be by the air from dissipation between top and the bottom valve rod 5a, 5b and liner cylindrical portion 26.
In valve body integration process, top and the bottom valve body 3a, 3b that shaft sealing part 17 with attaching will the company of being built-in with Then in the state that the valve seat bush 11 of the valve disc 2 of top and the bottom valve rod 5a, 5b sandwiches, by top and the bottom valve rod 5a, 5b and valve disc 2 Connection and top and the bottom valve rod 5a, 5b can be used in the state of 2 rotation process of valve disc, top and the bottom valve body 3a, 3b is integrated.
In detail, first, the attaching shaft sealing part 17 in the attaching recess portion 29 of top valve body 3a in advance.At this point, from The inboard of the attaching recess portion 29 of bearing 34 is installed, disc spring 32, seal member 31, board member 33, seal sleeve 30 are arranged successively.
On the top valve body 3a of shaft sealing part 17 in such attaching, loading be built-in be connected to top and the bottom valve rod 5a, The valve seat bush 11 of the valve disc 2 of 5b.The first half of valve seat bush 11 is loaded into the valve body 3a of top as a result,.
On the other hand, for lower part valve body 3b, also same as top valve body 3a, attaching axis is close in attaching recess portion 29 in advance Seal component 17.
In this case, the lower half side for being loaded into the valve seat bush 11 in the valve body 3a of top is encased in lower part valve body 3b In, become the state for valve seat bush 11 being sandwiched by these tops valve body 3a and lower part valve body 3b.
In this case, the threaded connection bolt 27 in the bolt hole 36 of top and the bottom valve body 3a, 3b as shown in Figure 2, Top and the bottom valve body 3a, 3b are fixed to each other.Top and the bottom valve body 3a, 3b are fastened on being threadedly coupled direction as a result, 32 quilt of disc spring Compression, is acted on by the pushing force of above-mentioned disc spring 32 on seal sleeve 30, the valve seat bush 11 and valve disc of the upper and lower sides of valve disc 2 2 upper-lower seal, 42 inner circumferential of axis charging tube part as once sealing is closely contacted on 26 periphery of liner cylindrical portion and the liner cylinder The conduct of portion 26 and 5 peripheral surface of valve rod contiguity sealing brought as the sealing of secondary seal and by seal member 31 is three times The sealing of sealing, in top and the bottom, the axis dress position of valve rod 5a, 5b function compoundly, pass through the sealing work(of above-mentioned valve flank It can be played with being superimposed together with the axle envelope sealing function, it can be by the leakproofness on the 2 entire circumferential surface of valve disc after assembling higher Ensure.
In valve rod positioning process, by the way that top valve rod 5a, lower part valve rod 5b are positioned with the state that can be rotated respectively It is fixed on top valve body 3a, lower part valve body 3b, prevents flying out for they.
In fig. 2, for top valve rod 5a, via dust-proof O-ring 80, thrust washer 81,82 attaching of c-type baffle ring. In the case, in the state that top valve rod 5a is inserted in valve disc 2, position of the upper periphery of valve rod 5a on the top Attaching O-ring 80, thrust washer 81 are set, is engaged with top valve rod 5a from their top by c-type baffle ring 82.In this state, The cover clamp of covering is configured via the thrust washer 81 of the top of c-type baffle ring 82(grand plate)83, by the cover clamp 83 It is fixed from the top of valve body 1 with screw element (not shown).The top sides valve body 3a are assembled in this way, can be arranged by via pushing away The anti-construction that flies out for the top valve rod 5a that the c-type baffle ring 82 and cover clamp 83 of power washer 81 are formed.
For lower part valve rod 5b, via O-ring 80, thrust washer 81, covering 84 attaching of end plate.In the case, exist The periphery attaching O-ring 80 of thrust washer 81 will be attached to the axis being formed on the valve body 3b of lower part and fill in hole 28 in thrust washer 81, It is arranged opposite with the valve foreign side side end face of lower part valve rod 5b.In this case, axis dress hole 28 is blocked with end plate 84, by the end plate 84 are fixed with affixed bolt 85 from the lower section of valve body 1.The axis of the sides lower part valve rod 5b is installed into as a result,.
In addition, in the case where decomposing valve body 1, as long as can with the sequence implementation opposite with the case where above-mentioned assembling With.In the case, if by top and the bottom valve body 3a, 3b after valve seat bush 11 removes, as follows by valve seat bush 11 decompose.
In the top and the bottom of valve seat bush 11, seal sleeve 30 is gradually extracted from the valve seat bush 11 and is removed.Will be upper In the case that lower valve rod 5a, 5b are removed, lower valve rod 5a, 5b on these are held respectively on one side, on one side gradually from the valve shaft of valve disc 2 It extracts successively in hole 13.
After the extraction of upper lower valve rod 5a, 5b, valve disc 2 is made to rotate, becomes the state of fully open position as shown in Figure 13, Keep the flow path portion periphery of valve seat bush 11 parallel with flange part 41, and pushed from the shaft core orthogonal direction of axis charging tube part 42, It is oval as long side to be morphed into 42 direction of axis charging tube part.Continue the pushing, until being deformed into elliptoid valve seat The long side of bushing 11 is more than the height of valve disc 2, keeps the shaft core of axis charging tube part 42 parallel with the shaft core of liner cylindrical portion 26, also, Make the height of valve disc 2 on one side and become identical degree to 42 mutual distance of axis charging tube part, on one side gradually by valve disc 2 from valve seat Bushing 11 removes.It can decompose as above.
As described above, apply external force to valve seat bush 11 under normal temperature state and be morphed into elliptoid state Under, to be packed into valve disc 2 to 11 inner circumferential of valve seat bush to wick-like state, valve seat bush 11 is made to be restored to round type from ellipticity, So that liner cylindrical portion 26 is inserted into axis charging tube part 42, valve disc 2 is attached on valve seat bush 11, then, by top and the bottom valve rod The interconnecting piece 25 of 5a, 5b are gradually inserted into the valve rod hole portion 24 of valve disc 2 and connect them, and shaft sealing part 17 with attaching Top and the bottom valve body 3a, 3b sandwich the valve seat bush 11 for being built-in with valve disc 2 and integrated, to manufacture valve body 1, thereby, it is possible to While so that the leakproofness near the boss portion 15 of valve seat bush 11 is improved, the resin coating of valve seat bush 11 and valve rod 5 is prevented The damage of cap and easily attaching valve disc 2 assemble.It, also can be same simple with the case where assembling also, about apportioned effort Singly implement.
In the case, by making valve seat bush 11 be deformed into ellipticity, being pushed from foreign side so that the valve seat bush 11 The long side R1 of inner circumferential sealing surface 21 can be reliably prevented what valve disc 2 was contacted with valve seat bush 11 than the overall length R2 long of valve disc 2 Meanwhile valve disc 2 is dismounted to ensure the axle envelope leakproofness near boss 15 relative to valve seat bush 11.

Claims (6)

1. a kind of seal construction of butterfly valve, on the inner peripheral surface of valve disc surface and the valve body that the ground axle suspension valve disc can be rotated The liner layer being made of resin material is respectively set, and in the diametric(al) for being located at the valve seat bush as valve body sidelining layer Valve shaft hole axis at opposed locations fills valve rod, when the valve alar part crimping by the valve rod rotation process up to major general's valve disc is sealed in On valve body inner peripheral surface, which is characterized in that
In inner circumferential side attaching support rubber above-mentioned valve body inner peripheral surface on cover valve seat bush, the internal diameter of the valve seat bush exists It is another to be deformed into the internal diameter for being comparably path with the outer diameter of above-mentioned valve disc under the effect of the elastic force of above-mentioned support rubber when valve opening The internal diameter of aspect, above-mentioned valve seat bush when valve closing is set as, above-mentioned valve disc by above-mentioned valve seat bush push and in above-mentioned branch The internal diameter before being deformed to path under the elastic force effect of rubber is supportted, the internal diameter before the deformation is set as comprising tolerance and above-mentioned valve disc Outer diameter is identical.
2. the seal construction of butterfly valve as described in claim 1, which is characterized in that
By being set as the thickness of above-mentioned support rubber with the width dimensions of the support rubber substantially with size or than the support rubber The width dimensions of glue are slightly long, are easy for the internal diameter of above-mentioned valve seat bush to be restored to the internal diameter before above-mentioned deformation in valve closing.
3. the seal construction of butterfly valve as claimed in claim 1 or 2, which is characterized in that
When in valve closing will radially be stated in above-mentioned valve seat bush deformation before internal diameter restore when, by above-mentioned support rubber with Protrusion that is expanding and swelling in the direction of the width is received into the clearance portion being located between above-mentioned valve body and above-mentioned valve seat bush.
4. the seal construction of butterfly valve as claimed in claim 1 or 2, which is characterized in that
The width of above-mentioned support rubber is set as the size roughly the same with the valve wing difference of above-mentioned valve disc, aforementioned valve wing difference root According to the length of the aforementioned valve alar part end from the end face of aforementioned valve body to one end and from the end face of aforementioned valve body to another side The difference of length of aforementioned valve alar part end find out.
5. the seal construction of butterfly valve as claimed in claim 1 or 2, which is characterized in that
Above-mentioned liner layer is fluororesin.
6. the seal construction of butterfly valve as claimed in claim 1 or 2, which is characterized in that
In two surface sides of the valve flank end of the valve disc liner as above-mentioned valve disc sidelining layer, the conical surface of predetermined angular is set, The sealing for crimping sealing with above-mentioned valve seat bush is formed between these conical surfaces, and the width of the sealing is set as and above-mentioned valve disc Arbor end side the roughly the same size of width.
CN201580017251.3A 2014-03-28 2015-03-26 The seal construction of butterfly valve CN106415087B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2014068084 2014-03-28
JP2014068083 2014-03-28
JP2014-068083 2014-03-28
JP2014-068084 2014-03-28
PCT/JP2015/059448 WO2015147197A1 (en) 2014-03-28 2015-03-26 Seal structure for butterfly valve

Publications (2)

Publication Number Publication Date
CN106415087A CN106415087A (en) 2017-02-15
CN106415087B true CN106415087B (en) 2018-11-13

Family

ID=54195701

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580017251.3A CN106415087B (en) 2014-03-28 2015-03-26 The seal construction of butterfly valve

Country Status (3)

Country Link
JP (1) JP6495243B2 (en)
CN (1) CN106415087B (en)
WO (1) WO2015147197A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106015596A (en) * 2016-05-19 2016-10-12 佛山市中境净化设备有限公司 Electric stainless steel airtight valve
JP6755140B2 (en) * 2016-07-20 2020-09-16 旭有機材株式会社 Butterfly valve
KR101881460B1 (en) * 2016-10-20 2018-07-24 주식회사 솔브 Metal Butterfly valve with corrosion resistance
DE102018102062A1 (en) * 2018-01-30 2019-08-01 Protechna S.A. Removal fitting for liquid containers
TWI677638B (en) * 2018-09-04 2019-11-21 和正豐科技股份有限公司 Fluoroplastic butterfly valve structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991974A (en) * 1973-12-19 1976-11-16 Applications Mecaniques Et Robinetterie A.M.R.I. Butterfly valve
CN202901322U (en) * 2012-11-14 2013-04-24 宣达实业集团浙江东信特氟隆阀门有限公司 Lining plastic butterfly valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645663U (en) * 1979-09-19 1981-04-23
JP2003166654A (en) * 2001-11-28 2003-06-13 Tomoe Tech Res Co Butterfly valve
JP2005024013A (en) * 2003-07-03 2005-01-27 Kubota Corp Seal structure of butterfly valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991974A (en) * 1973-12-19 1976-11-16 Applications Mecaniques Et Robinetterie A.M.R.I. Butterfly valve
CN202901322U (en) * 2012-11-14 2013-04-24 宣达实业集团浙江东信特氟隆阀门有限公司 Lining plastic butterfly valve

Also Published As

Publication number Publication date
JPWO2015147197A1 (en) 2017-04-13
JP6495243B2 (en) 2019-04-10
WO2015147197A1 (en) 2015-10-01
CN106415087A (en) 2017-02-15

Similar Documents

Publication Publication Date Title
JP4654747B2 (en) On-off valve device for fluid
US20140210166A1 (en) Cartridge seal assemblies and associated methods
CN102027186B (en) Threaded joint with improved resilient seal ring
US8186371B2 (en) Method of assembling a ball valve
US9989157B2 (en) Valve vented redundant stem seal system
US6655658B2 (en) Plug valve assembly and fluid flow control method with improved low pressure sealing
US5230498A (en) Live load packing system
US7311118B2 (en) Floating ball check valve
CA1105438A (en) Sealing ring
US9587747B2 (en) Flexible seals for process control valves
EP2354435B1 (en) Composite metallic elastomeric sealing components for roller cone drill bits
CA1106344A (en) Ball valve with readily removable ball and seats for high temperature environment
JP5960684B2 (en) Sleeve seal assembly and rotary valve having sleeve seal assembly
US2373628A (en) Spherical plug valve
EP0480899A2 (en) Live load packing system
US20090255940A1 (en) Tank
CN103732962B (en) Safety check
TWI698602B (en) Control plate in a valve
US4451047A (en) Seal
JP3861206B2 (en) Fluid controller
JP4791547B2 (en) Valve seal packing structure for valves
EP2623825B1 (en) Valve assembly and components therefore
EP1282792B1 (en) Improved ring seal
KR20140128983A (en) Trunnion ball valve for high pressure, and hydrogen station
CN104411922B (en) For the gasket device of turbine bearing(s), including two elastic sealing elements

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant