WO2022025170A1 - バタフライバルブ - Google Patents
バタフライバルブ Download PDFInfo
- Publication number
- WO2022025170A1 WO2022025170A1 PCT/JP2021/028060 JP2021028060W WO2022025170A1 WO 2022025170 A1 WO2022025170 A1 WO 2022025170A1 JP 2021028060 W JP2021028060 W JP 2021028060W WO 2022025170 A1 WO2022025170 A1 WO 2022025170A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- bush
- peripheral surface
- valve shaft
- valve body
- Prior art date
Links
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- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 238000013459 approach Methods 0.000 claims description 3
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- 238000005452 bending Methods 0.000 description 23
- 229920003002 synthetic resin Polymers 0.000 description 21
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- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
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Images
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
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
-
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/222—Shaping of the valve member
-
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
Definitions
- the present invention relates to a butterfly valve provided with a valve body in which the circumference of a core material is coated with a resin material.
- a valve body formed by covering a metal core material (insert) with a synthetic resin material having excellent corrosion resistance and chemical resistance is used.
- a butterfly valve is used.
- a valve shaft rotatably supported by a bearing hole provided in the valve body is passed through a through hole of a seat ring mounted on the inner peripheral surface of the internal flow path, and is provided in the valve body. It is non-rotatably connected to the valve shaft hole and is configured to rotatably support the valve body in the internal flow path by the valve body.
- the butterfly valve has a seat ring with the peripheral portion of the valve shaft hole on the outer peripheral edge of the valve body so that the fluid in the internal flow path does not leak into the valve shaft hole of the valve body or the bearing hole of the valve body. Sealed part on the valve seat surface between the peripheral part of the through hole, the seal part due to contact between the outer peripheral surface of the valve shaft and the inner peripheral surface of the through hole of the seat ring, the outer peripheral surface of the valve shaft and the bearing hole and the valve. It is provided with a multi-stage sealing portion such as a sealing portion between the inner peripheral surface of the shaft hole.
- the valve body when the valve is closed, the pressure of the fluid in the internal flow path acts on the valve body, and the valve body is pushed to the secondary side (downstream side). As a result, the valve shaft connected to the valve body tends to move toward the secondary side.
- the bearing hole of the valve body has an inner diameter slightly larger than the outer diameter of the valve shaft in order to absorb processing errors of the valve shaft and the bearing hole and prevent seizure of the valve shaft. It is generally formed so that a gap is provided between the inner peripheral surface of the wheel and the outer peripheral surface of the valve shaft. Therefore, when a fluid pressure acts on the valve body, the valve shaft moves toward the secondary side together with the valve body by the amount of this gap.
- a bush extending from the bearing hole of the valve body to the valve shaft hole of the valve body is rotatably externally attached to the valve shaft.
- the valve shaft is rotatably supported in the bearing hole and the valve shaft hole via the bush, and by providing a sealing member such as an O-ring on the outer peripheral surface of the bush, the outer peripheral surface of the valve shaft, the bearing hole of the valve body, and the seat are provided.
- a butterfly valve has been proposed in which the valve shaft of the ring and the inner peripheral surface of the valve shaft hole of the valve body are sealed.
- a butterfly valve having a valve body formed by covering a metal core material with a synthetic resin material and supporting a valve shaft in a bearing hole and a valve shaft hole via a bush is provided for a corrosive liquid.
- the metal insert When used in the piping line of the valve, the metal insert is used in consideration of supporting the bending moment generated in the valve shaft by the fluid pressure acting on the valve body when the valve is closed by the bearing hole of the valve body. It may be placed around the bearing hole for reinforcement. In such a case, since the corrosive liquid is handled, the seal portion around the valve shaft is worn and the seal around the valve shaft between the outer peripheral edge portion of the valve body and the valve seat surface of the seat ring is broken.
- the liquid leaking from the internal flow path into the bearing hole does not come into contact with the metal insert of the valve body. That is, it is desirable that the periphery of the insert member is completely covered with a synthetic resin material so that the insert member is not exposed to the outside. For this purpose, it is necessary that the circumference of the opening of the bearing hole is formed only from the synthetic resin material without providing the insert member around the opening on the inner flow path side of the bearing hole. With such a configuration, the insert member is not reinforced in the peripheral portion of the opening of the bearing hole of the valve body.
- an object of the present invention is to solve the problems existing in the prior art, and to solve the problem existing in the prior art, the force due to the bending moment generated in the valve shaft due to the fluid pressure acting on the valve body at the time of valve closing is applied to the internal flow path side of the valve shaft hole via the bush. It is an object of the present invention to provide a butterfly valve which prevents transmission to the vicinity of the opening of the valve body and suppresses damage to the valve body.
- the present invention relates to a valve body having at least a surface formed of a resin material and an internal flow path formed thereof, a valve shaft rotatably supported by the valve body, and the valve shaft.
- a butterfly valve including a valve body that is connected and rotatably supported by the valve body and is arranged in the internal flow path, and a bush that is externally inserted to the valve shaft, and the bush is attached to the valve body.
- a bearing hole that rotatably supports the valve shaft is provided via the bearing hole, and the bearing hole has an opening that opens into the internal flow path.
- the bearing hole and the bush are adjacent to the opening.
- a butterfly valve having a shape such that a gap is formed between an inner peripheral surface of the bearing hole and an outer peripheral surface of the bush in the region to be provided.
- the valve shaft connected to the valve body is rotatably supported by the bearing hole of the valve body via the bush, and the bearing hole is formed in the region adjacent to the opening of the bearing hole to the internal flow path.
- a gap is formed between the inner peripheral surface of the bearing and the outer peripheral surface of the bush.
- the resin material portion near the opening is likely to be damaged due to stress concentration due to the fluid pressure received by the valve body when the valve is closed.
- a gap is formed between the inner peripheral surface of the bearing hole and the outer peripheral surface of the bush in the region adjacent to the opening. Therefore, even if fluid pressure acts on the valve body when the valve is closed and a bending moment is generated in the valve shaft connected to the valve body, in the region adjacent to the opening of the bearing hole, the inner peripheral surface of the bearing hole is formed.
- the gap between the outer peripheral surface of the bush and the outer peripheral surface serves as an escape allowance to avoid contact between the outer peripheral surface of the bush and the inner peripheral surface of the bearing hole, and prevent the transmission of force from the outer peripheral surface of the bush to the inner peripheral surface of the bearing hole. be able to.
- an annular constriction portion is provided on the outer peripheral portion of the bush portion adjacent to the opening, and the gap between the inner peripheral surface of the bearing hole and the outer peripheral surface of the bush is formed by the constriction portion. It is preferable that it is.
- the valve shaft extends along the rotation axis of the valve body, the valve body further includes a tubular insert member for reinforcing the valve body, and the insert member is provided from the bearing hole. It is more preferably arranged so as to surround the bearing hole at a distance and extend in the direction of the rotation axis so as to surround at least a part of the constricted portion.
- the gap is formed so as to be adjacent to the opening and the gap between the inner peripheral surface of the bearing hole and the outer peripheral surface of the bush becomes larger as it approaches the opening. It is preferable to include a tapered portion.
- the valve shaft fixed to the valve body is rotatably supported by the bearing hole of the valve body via the bush, and is adjacent to the opening of the bearing hole to the internal flow path.
- a gap is formed between the inner peripheral surface of the bearing hole and the outer peripheral surface of the bush. Therefore, even if fluid pressure acts on the valve body when the valve is closed and a bending moment is generated in the valve shaft connected to the valve body, in the region adjacent to the opening of the bearing hole, the inner peripheral surface of the bearing hole is formed.
- the gap between the outer peripheral surface of the bush and the outer peripheral surface serves as an escape allowance to avoid contact between the outer peripheral surface of the bush and the inner peripheral surface of the bearing hole, and prevent the transmission of force from the outer peripheral surface of the bush to the inner peripheral surface of the bearing hole. be able to.
- the butterfly valve has the effect of suppressing damage to the resin material portion near the opening of the bearing hole of the valve body.
- FIG. 3 is a partially enlarged cross-sectional view showing the vicinity of the opening of the bearing portion of the valve body shown in FIG. 3 in an enlarged manner. It is a partially enlarged sectional view which shows the deformation example of the bearing part of a valve body.
- FIG. 5 is a partially enlarged cross-sectional view showing the vicinity of an opening of a modified example of the bearing portion shown in FIG. 5 in an enlarged manner.
- FIG. 1 is a vertical cross-sectional view, and is a partially enlarged cross-sectional view showing the vicinity of the opening of the valve shaft hole for connecting the valve shaft of the butterfly valve shown in FIG. 1 to the valve body. It is a side view which shows the valve shaft of the butterfly valve shown in FIG.
- FIG. 1 is a vertical cross-sectional view of the butterfly valve when viewed from the flow path axial direction, and shows a valve closed state.
- FIG. 2 is a partial cross-sectional perspective view showing a cross section of the valve body of the butterfly valve shown in FIG. 1 by partially breaking the valve body.
- the butterfly valve 11 includes a substantially hollow cylindrical valve body 13 in which an internal flow path 13a extending in the direction of the flow path axis is formed, a valve shaft 15 rotatably supported by the valve body 13, and an internal flow path 13a.
- An annular seat ring 17 attached to the inner circumference and a valve body 19 arranged in the internal flow path 13a and connected to the valve shaft 15 and rotatably supported by the valve body 13 around the rotation axis R.
- a bush 21 made of a synthetic resin material that is rotatably externally inserted to the valve shaft 15 is provided, and a valve seat portion 17d formed on the inner peripheral surface of the seat ring 17 and an outer peripheral edge portion of the valve body 19 are provided.
- the valve shaft 15 has a first valve shaft 15a arranged on the upper side in FIG. 1 and a second valve shaft 15 arranged on the lower side in FIG. 1 along the rotation axis R.
- the bush 21 is composed of the valve shaft 15b of the above, and the bush 21 is also rotatably externally attached to the first valve shaft 15a, the first bush 21a and the second valve shaft 15b. It is composed of 21b.
- the valve body 19 is rotatably supported by the valve body 13 by the first valve shaft 15a and the second valve shaft 15b via the first bush 21a and the second bush 21b, respectively.
- a drive unit (not shown) is connected to the first valve shaft 15a, and by rotating the first valve shaft 15a using the drive unit, the valve body 19 is rotated around the rotation axis R to open and close the valve. I do.
- the valve shaft 15 is composed of two valve shafts 15 of a first valve shaft 15a and a second valve shaft 15b, but the first valve shaft 15a and the second valve shaft 15a. It is also possible to integrally form the valve shaft 15b to form one valve shaft 15. Similarly, it is also possible to integrally form the first bush 21a and the second bush 21b to form one bush 21.
- the first valve shaft 15a and the second valve shaft 15b are formed of a metal material such as cast iron, steel, carbon steel, copper, copper alloy, brass, stainless steel, aluminum, and titanium, but there is a problem in strength.
- the material is not particularly limited as long as there is no such material.
- the valve body 13 is made of a synthetic resin material.
- the synthetic resin material include polyvinyl chloride (PVC), polypropylene (PP), polyvinylidene fluoride (PVDF), polyethylene (PE), polyphenylene sulfide (PPS), polydicyclopentadiene (PDCPD), and polytetrafluoroethylene (PTFE).
- a substantially disk-shaped top flange 23 is provided on the upper portion of the valve body 13. Further, in the valve body 13, a first bearing hole 25 and a second bearing extending from the internal flow path 13a to the outside facing each other in the radial direction (vertical direction in FIG. 1) of the internal flow path 13a. The holes 27 are formed.
- the first bearing hole 25 extends through the top flange 23.
- a first valve shaft 15a is inserted through the first bearing hole 25 with the first bush 21a externally inserted, and is rotatably supported in the first bearing hole 25 via the first bush 21a. Has been done.
- the upper end of the first valve shaft 15a inserted into the first bearing hole 25 protrudes from the top flange 23 and extends so as to be connected to a drive unit installed on the top flange 23. ..
- a drive unit for example, a lever type drive unit, a gear type drive unit, an automatic drive unit, or the like can be used.
- the lower ends of the first valve shaft 15a and the first bush 21a inserted into the first bearing hole 25 extend from the first bearing hole 25 so as to project toward the internal flow path 13a. ..
- the second valve shaft 15b is inserted into the second bearing hole 27 with the second bush 21b externally inserted, and rotates into the second bearing hole 27 via the second bush 21b. It is supported as much as possible.
- the lower end of the second bearing hole 27 is closed by the valve shaft holder 29, and the lower ends of the second valve shaft 15b and the second bush 21b inserted into the second bearing hole 27 are valve shaft holders. It is designed to come into contact with 29.
- the upper ends of the second valve shaft 15b and the second bush 21b inserted into the second bearing hole 27 extend from the second bearing hole 27 so as to project toward the internal flow path 13a. ..
- a metal insert member 31 for reinforcement is included so as to be separated from the first bearing hole 25 and the second bearing hole 27 and surround them.
- the metal material forming the insert member 31 stainless steel for casting is used, but the present invention is not limited to this, and the valve shaft is not limited to this as long as it has a higher mechanical strength than the valve body 13.
- the insert member 31 may be formed from the same other metal material as in 15, or the insert member 31 may be formed from a non-metal material.
- the insert member 31 has a substantially tubular shape. Specifically, the insert member 31 is located at a central portion of a substantially rectangular parallelepiped shape, a cylindrical portion located farther from the internal flow path 13a than the central portion, and a cylindrical portion located closer to the internal flow path 13a than the central portion.
- a shape including a base portion larger than the central portion and smaller than the central portion, and a through hole having a diameter larger than that of the first bearing hole 25 and the second bearing hole 27 formed in the center of the cylindrical portion, the central portion, and the base portion.
- a bolt hole for screwing a bolt when connecting the valve body 13 to the pipe is formed in the central portion.
- the insert member 31 having such a shape is arranged apart from each other on the radial outer side of the first bearing hole 25 and the second bearing hole 27. It is assumed that the first bearing hole 25 and the second bearing hole 27 are corrosive because they are embedded in the valve body 13 and are not exposed in the first bearing hole 25 and the second bearing hole 27. This is to prevent the metal insert member 31 from coming into contact with the liquid even when the fluid of the above is invaded.
- the seat ring 17 is, for example, ethylene propylene rubber (EPDM), chloroprene rubber (CR), isoprene rubber (IR), chlorosulphonized rubber (CSM), nitrile rubber (NBR), styrene butadiene rubber (SBR), chlorinated polyethylene.
- EPDM ethylene propylene rubber
- CR chloroprene rubber
- IR chloroprene rubber
- CSM chlorosulphonized rubber
- NBR nitrile rubber
- SBR styrene butadiene rubber
- CM Fluorine Rubber
- FKM Hydrogenated Acrylonitrile butadiene Rubber
- U Urethane Rubber
- VMQ, FVMQ Silicone Rubber
- EPM Ethylene Propylene Rubber
- ACM Butyl Rubber
- IIR Butyl Rubber It is formed from an elastic material such as, or a material in which these elastic members are coated with a fluororesin.
- the seat ring 17 has a ring body 17a having a substantially tubular shape and extending in the central axis direction, and a flange portion 17b extending outward from both ends of the ring body 17a in the center axis direction facing each other (see FIG. 3).
- a pair of through holes 17c and 17c for passing the first valve shaft 15a and the second valve shaft 15b, respectively, are formed at positions facing the ring body 17a in the radial direction. ..
- valve seat portion 17d extending in an annular shape is formed on the inner peripheral surface of the ring body 17a, and the outer peripheral edge portion of the valve body 19 abuts on the valve seat portion 17d to contact the inner peripheral surface of the seat ring 17.
- the space between the valve body 19 and the outer peripheral edge portion is sealed so that the internal flow path 13a can be blocked by the valve body 19.
- the valve body 19 is arranged inside the seat ring 17 mounted on the inner peripheral surface of the internal flow path 13a of the valve body 13.
- the valve body 19 is integrated with a contour forming member 33 which is formed of a synthetic resin material and has a substantially disk-shaped outer shape, and a core material 35 which is formed of a metal material and is surrounded by the contour forming member 33. Is formed in.
- the valve body 19 in the present embodiment is formed by injecting a synthetic resin material forming the contour forming member 33 into a mold for injection molding in which a core material 35 is previously installed.
- PVDF having high chemical resistance is used as the synthetic resin material forming the contour forming member 33 in the present embodiment, but the present invention is not limited to this, and for example, PP, PVC, PE, PFA, PVCPD. It is also possible to use other synthetic resin materials such as.
- the metal material forming the core material 35 in the present embodiment an aluminum alloy for casting is used, but the present invention is not limited to this, and the metal material has higher mechanical strength than the contour forming member 33. If this is the case, the core material 35 may be formed from another metal material similar to the valve shaft, or the core material 35 may be formed from a non-metal material.
- a first valve shaft hole 37 and a second valve shaft hole 39 are provided on the outer peripheral portion of the valve body 19 at positions facing each other along the rotation axis R, and the first valve shaft hole 37 is provided. And the second valve shaft hole 39 are formed coaxially with the rotation axis R.
- the second valve shaft hole 39 is also formed as a single through hole.
- the first valve shaft hole 37 further rotates from the relatively large-diameter first large-diameter hole portion 37a including the opening end (opening to the internal flow path 13a) and the first large-diameter hole portion 37a. It includes a first small-diameter hole portion 37b having a relatively small diameter extending inward in the R direction of the axis.
- the inner peripheral surface of the first large-diameter hole portion 37a is formed by the contour forming member 33, while the inner peripheral surface of the first small-diameter hole portion 37b is formed by the core material 35.
- a first valve shaft 15a and a first bush 21a protruding from the first bearing hole 25 of the valve body 13 through the through hole 17c of the seat ring 17 are inserted into the first valve shaft hole 37.
- the first large-diameter hole portion 37a of the first valve shaft hole 37 supports the first valve shaft 15a via the first bush 21a.
- the first bush 21a is not inserted into the first small-diameter hole portion 37b, but a portion on the tip end side of the first valve shaft 15a (hereinafter referred to as a tip portion) is directly inserted into the first small-diameter hole portion 37b.
- the tip portion of the valve shaft 15a is fitted into the first small-diameter hole portion 37b so as to be non-rotatable around the rotation axis R.
- the tip portion of the first valve shaft 15a and the first small diameter hole portion 37b so as to have a complementary polygonal shape, a circular two-chamfer shape, or the like, the tip portion of the first valve shaft 15a can be formed.
- the first small diameter hole portion 37b can be fitted so as not to rotate.
- a method of fitting the first valve shaft 15a and the first small-diameter hole portion 37b Is not limited. Since the first bush 21a is not inserted into the first small-diameter hole portion 37b, only the inner peripheral surface of the first large-diameter hole portion 37a is a region in contact with the outer peripheral surface of the first bush 21a.
- the second valve shaft hole 39 also has a relatively large diameter second large diameter hole portion 39a including an opening end (opening to the internal flow path 13a). It includes a second small-diameter hole portion 39b having a relatively small diameter extending from the second large-diameter hole portion 39a to the inner side in the rotation axis R direction.
- the inner peripheral surface of the second large-diameter hole portion 39a is formed by the contour forming member 33, while the inner peripheral surface of the second small-diameter hole portion 39b is formed by the core material 35.
- the second valve shaft hole 39 a second valve shaft 15b and a second bush 21b that protrude from the second bearing hole 27 of the valve body 13 through the through hole 17c of the seat ring 17 are inserted.
- the second large-diameter hole portion 39a of the second valve shaft hole 39 supports the second valve shaft 15b via the second bush 21b.
- the second bush 21b is not inserted into the second small-diameter hole portion 39b, and a portion on the tip end side of the second valve shaft 15b (hereinafter referred to as a tip portion) is directly inserted and fitted.
- the second bush 21b Since the second bush 21b is not inserted into the second small-diameter hole portion 39b, only the inner peripheral surface of the second large-diameter hole portion 39a is a region in contact with the outer peripheral surface of the second bush 21b. Further, the second small-diameter hole portion 39b has a circular cross-sectional shape because it is not necessary to transmit rotational torque to and from the second valve shaft 15b, and in this respect, the first valve shaft hole. It is different from the first small diameter hole portion 37b of 37. However, the second small-diameter hole portion 39b may have the same configuration as the first small-diameter hole portion 37b.
- the contour forming member 33 around these forming the inner peripheral surfaces of the first large-diameter hole portion 37a and the second large-diameter hole portion 39a is specially referred to as a “shaft hole component 41”.
- the first valve shaft hole 37 and the second valve shaft hole 39 are different from each other in the cross-sectional shape of the first small diameter hole portion 37b and the second small diameter hole portion 39b. Since it has the same configuration, in the following description, the first valve shaft hole 37 will be mainly described as a representative.
- the valve shaft will be described with the first valve shaft 15a as a representative, and the bush will be described with the first bush 21a as a representative.
- the description of the first valve shaft 15a, the first bush 21a, and the first valve shaft hole 37 replaces them with the second valve shaft 15b, the second bush 21b, and the second valve shaft hole 39. Is applied.
- the "first" of the ordinal number included in the name of each component will be omitted. However, this does not apply when it is necessary to distinguish between the "first" and the "second”.
- the bush 21 (first bush 21a and second bush 21b) is formed of PVDF having high resistance to corrosive fluid in this embodiment.
- a plurality of sealing members 43 such as an O-ring are provided on the outer peripheral surface of the bush 21a so that the fluid does not enter the inside of the valve body 19 and does not come into contact with the valve shaft 15.
- four sealing members 43 are arranged in the portion of the bush 21a inserted into the large-diameter hole portion 37a of the valve shaft hole 37.
- the core material 35 includes a central portion 35a and a substantially lattice-shaped main reinforcing portion 35b provided symmetrically around the central portion 35a.
- Shaft hole reinforcing portions 35c and 35c having a substantially cylindrical shape are provided at the upper end portion and the lower end portion of the central portion 35a, respectively.
- the shaft hole reinforcing portions 35c and 35c are formed from the first valve shaft hole 37 and the second valve shaft hole 39 in the substantially rectangular parallelepiped portion provided at the upper end portion and the lower end portion of the central portion 35a.
- the shaft hole reinforcing portion 35c and the central portion 35a have the same outer shape.
- Such a shaft hole reinforcing portion 35c extends into the shaft hole forming portion 41 constituting the large-diameter hole portion 37a, and surrounds at least a part of the radial outside of the large-diameter hole portion 37a in the rotation axis direction, and is synthesized.
- the shaft hole component 41 formed of a resin material is reinforced.
- the shaft hole reinforcing portion 35c is provided with a plurality of through holes 35d penetrating the inner peripheral surface and the outer peripheral surface thereof. These through holes 35d function as passages of the synthetic resin material forming the shaft hole constituent portion 41 when the core material 35 is installed in the mold and the contour forming member 33 is injection-molded, and injection molding defects occur. Suppress.
- the shaft hole reinforcing portion 35c surrounds the radial outside of the first valve shaft hole 37 and the second valve shaft hole 39, and the inner circumference of the first valve shaft hole 37 and the second valve shaft hole 39. It is arranged away from the surface and is embedded in the shaft hole component 41 so as not to be exposed in the first valve shaft hole 37 and the second valve shaft hole 39. This is made of metal even if a corrosive fluid invades the first large-diameter hole portion 37a of the first valve shaft hole 37 and the second large-diameter hole portion 39a of the second valve shaft hole 39. This is to prevent the shaft hole reinforcing portions 35c and 35c of the above from coming into contact with the liquid.
- the first bearing hole 25 and the first bush 21a are in a region adjacent to an opening in which the first bearing hole 25 supporting the first valve shaft 15a opens in the internal flow path 13a.
- the shape is such that a gap (space) is formed between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a.
- meat is stolen from the outer peripheral surface of the first bush 21a to steal meat from the first bush.
- a gap may be formed between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a, and the inner peripheral surface of the first bearing hole 25 may be formed.
- the method of forming a gap between the first bush 21a and the outer peripheral surface thereof is not particularly limited.
- the constricted portion 45 is provided on the inner peripheral surface of the first bearing hole 25, the wall thickness around the first bearing hole 25 that supports the bending moment may become thin and the strength may decrease. Therefore, it is preferable that the constricted portion 45 is provided on the outer peripheral surface of the first bush 21a, which is easier to process than the first bearing hole 25 of the valve body 13.
- the fluid pressure acts on the valve body 19 to move the valve body 19 to the secondary side (downstream side) and bend it to the first valve shaft 15a fixed to the valve body 19.
- a moment is generated, and the first bearing hole 25 tries to support the force due to this bending moment through the first bush 21a.
- stress concentration occurs in the vicinity of the opening of the first bearing hole 25.
- the fluid in the internal flow path 13a flows into the valve seat portion 17d around the through hole 17c of the seat ring 17 and the outer peripheral edge portion around the first valve shaft hole 37 of the valve body 19.
- the insert member 31 in order to prevent the fluid in the internal flow path 13a from coming into contact with the insert member 31 made of a metal material, the insert member 31 is covered with a synthetic resin material of the valve body 13 so as not to be exposed to the outside.
- the inner peripheral surface of the first bearing hole 25 and the inner peripheral surface of the internal flow path 13a of the valve body 13 are arranged apart from each other.
- the insert member 31 does not exist in the vicinity of the opening of the first bearing hole 25, and the vicinity of the opening of the first bearing hole 25 is formed only from the synthetic resin material.
- the first bearing hole 25 cannot withstand the force due to the bending moment transmitted from the first valve shaft 15a via the first bush 21a and may be damaged.
- the butterfly valve 11 can suppress damage to the resin material portion near the opening of the first bearing hole 25 of the valve body 13.
- the fulcrum is on the opposite side to the internal flow path 13a side.
- the displacement of the valve shaft 15a of 1 from the rotation axis R becomes larger as it gets closer to the internal flow path 13a. Therefore, the size of the gap (space) between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a, that is, the depth of the constricted portion 45 is the internal flow path of the first bearing hole 25.
- the bearing is formed in a tapered shape so as to become larger as it approaches the opening to 13a. This makes it possible to minimize the amount of meat theft.
- the size of the gap (space) between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a, that is, the depth of the constricted portion 45 is too large, the first valve shaft Deformation (that is, bending) of 15a is allowed, the displacement of the valve body 19 becomes large, and the valve seat sealing property deteriorates. Therefore, it is preferable to adjust the amount of meat stealing of the gap, that is, the constricted portion 45 so that the force due to the bending moment is not transmitted even if the valve body 19 is displaced when receiving pressure from the fluid.
- the insert member 31 extends in the direction of the rotation axis R to at least a part of the constriction portion 45 in the radial direction.
- the insert member 31 By extending the insert member 31 in the direction of the rotation axis R to the vicinity of the opening of the first bearing hole 25 in this way, the strength around the opening of the first bearing hole 25 is increased, and a larger fluid is provided. Even if the pressure acts on the valve body 19, the first bearing hole 25 can withstand the force due to the bending moment acting from the first valve shaft 15a through the first bush 21a.
- the thickness of the insert member 31 is as thick as possible.
- the second bearing hole 27 and the second bush 21b are also adjacent to the opening where the second bearing hole 27 supporting the second valve shaft 15b opens into the internal flow path 13a.
- it is configured to have a shape such that an annular gap (space) is formed between the inner peripheral surface of the second bearing hole 27 and the outer peripheral surface of the second bush 21b.
- the configuration and operation of the second bearing hole 27, the second bush 21b and their surroundings are the same as the configuration and operation of the first bearing hole 25, the first bush 21a and its surroundings described above. , The explanation is omitted.
- FIGS. 5 and 6 show an example of modification of the structure of the support portion of the valve shaft 15 by the valve body 13 in the butterfly valve 11 shown in FIG.
- the configuration of the support portion of the valve shaft 15 by the valve body 13 of this modification is that the cylindrical insert member 31'is provided with a plurality of through holes 31'a extending from the inner peripheral surface to the outer peripheral surface, and The insert member 31'is extended to the radial outside of the portion (constricted portion 45) in which an annular gap (space) is formed between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a.
- the support of the valve shaft 15 by the valve body 13 of the embodiments shown in FIGS. 3 and 4 in that it is extended but shorter and thinner than the embodiments shown in FIGS. 3 and 4.
- the configuration is different, and other points are the same as the configuration of the support portion of the valve shaft 15 by the valve body 13 of the embodiment shown in FIGS. 3 and 4. If the strength of the first bearing hole 25 is reinforced, the constricted portion 45 can be provided on the inner peripheral surface of the first bearing hole 25.
- the through hole 31'a of the insert member 31' functions as a passage for the synthetic resin material when the insert member 31'is installed in the mold and the synthetic resin material forming the valve body 13 is injection-molded, and is injected. Suppress the occurrence of molding defects.
- the insert member 31' is a portion (constricted portion 45) in which a gap space is formed between the inner peripheral surface of the first bearing hole 25 and the outer peripheral surface of the first bush 21a in the direction of the rotation axis R. It suffices to extend to at least a part of the radial outside of the bearing, and the length and thickness can be appropriately designed.
- first bearing hole 25, the first bush 21a, and the peripheral portion thereof have been described above, the second bearing hole 27, the second bush 21b, and the peripheral portion thereof have the same configuration. There is.
- the first bush 21a and the first valve shaft 15a are the inner peripheral surface and the contour of the portion of the first bush 21a located inside the shaft hole component 41 of the contour forming member 33 in the radial direction. It is configured to have a shape such that a gap (space) is formed between the first valve shaft 15a and the outer peripheral surface of the portion of the first valve shaft 15a located inside the shaft hole constituent portion 41 of the forming member 33 in the radial direction. ..
- meat is stolen from the outer peripheral surface of the portion of the first valve shaft 15a located in the shaft hole component 41 of the contour forming member 33, and is shown in FIG.
- annular constriction portion 47 By providing an annular constriction portion 47 extending in the circumferential direction on the outer peripheral surface of the first valve shaft 15a as described above, a gap is provided between the inner peripheral surface of the first bush 21a and the outer peripheral surface of the first valve shaft 15a. Is formed. However, meat is stolen from the inner peripheral surface of the portion of the first bush 21a located inside the shaft hole component 41 of the contour forming member 33 in the radial direction and extends in the circumferential direction to the inner peripheral surface of the first bush 21a.
- a gap may be formed between the inner peripheral surface of the first bush 21a and the outer peripheral surface of the first valve shaft 15a, and the inner peripheral surface of the first bush 21a may be formed.
- the method of forming a gap between the valve shaft 15a and the outer peripheral surface of the first valve shaft 15a is not particularly limited.
- the first bush 21a is formed of a resin material and the first valve shaft 15a is made of a metal material, the latter has higher strength, so that the constricted portion 47 has a first valve shaft. It is preferable to provide it on the outer peripheral surface of 15a.
- valve body 19 When fluid pressure acts on the valve body 19 when the butterfly valve 11 is closed, the valve body 19 tries to move to the secondary side (downstream side), and the shear stress and bending moment generated in the valve body 19 are transferred to the first valve.
- the shaft hole 37 tries to be supported via the first bush 21a. At this time, the reaction force from the first valve shaft 15a supported by the first valve shaft hole 37 is transmitted to the inner peripheral surface of the first valve shaft hole 37 of the valve body 19.
- the first valve shaft 15a When the inner peripheral surface of the first bush 21a and the outer peripheral surface of the first valve shaft 15a are in contact with each other in the first large-diameter hole portion 37a of the first valve shaft hole 37, the first valve shaft 15a The reaction force from the above is transmitted to the inner peripheral surface of the first large-diameter hole portion 37a of the first valve shaft hole 37 via the first bush 21a.
- the inner peripheral surface of the first large-diameter hole portion 37a is formed by the shaft hole constituent portion 41, and is covered with a contour forming member 33 made of a synthetic resin material so that the shaft hole reinforcing portion 35c of the core material 35 does not come into contact with liquid.
- the shaft hole reinforcing portion 35c is arranged apart from the inner peripheral surface of the first large-diameter hole portion 37a and the outer peripheral surface of the valve body 19).
- the perimeter of the opening to is made only of synthetic resin material. Therefore, the first large-diameter hole portion 37a of the first valve shaft hole 37 can withstand the reaction force (shear force and bending moment) transmitted from the first valve shaft 15a via the first bush 21a. It cannot be done and may be damaged.
- the inner peripheral surface of the portion located inside the shaft hole component 41 forming the first large-diameter hole portion 37a in the radial direction and the inside in the radial direction of the shaft hole component 41 are examples of synthetic resin material.
- a gap (space) is formed between the portion located at the position and the outer peripheral surface of the first valve shaft 15a. Therefore, even if the fluid pressure acts on the valve body 19 at the time of valve closing and a bending moment is generated in the valve body 19, the first large-diameter hole portion 37a configured by the shaft hole constituent portion 41 is the first.
- the gap between the outer peripheral surface of the valve shaft 15a and the inner peripheral surface of the first bush 21a serves as a relief allowance, and the outer peripheral surface of the first valve shaft 15a and the inner peripheral surface of the first bush 21a come into contact with each other.
- the butterfly valve 11 can suppress damage to the resin material portion (shaft hole constituent portion 41) in the vicinity of the opening of the first valve shaft hole 37 of the valve body 19.
- the constricted portion 47 is a portion located in the first large-diameter hole portion 37a formed by the shaft hole forming portion 41 on the outer peripheral surface of the first valve shaft 15a (that is, the first portion in the shaft hole forming portion 41).
- the size of the gap (space) between the outer peripheral surface of the first valve shaft 15a and the inner peripheral surface of the first bush 21a, that is, the depth of the constricted portion 47 is too large, the first valve shaft The displacement of the valve body 19 with respect to 15a becomes large, and the valve seat sealing property deteriorates. Therefore, it is preferable to adjust the amount of meat stealing of the gap, that is, the constricted portion 47 so that the force due to the bending moment is not transmitted even if the valve body 19 is displaced when receiving pressure from the fluid.
- both the second valve shaft 15b and the second bush 21b are the inner peripheral surfaces of the portion of the second bush 21b located inside the shaft hole component 41 of the contour forming member 33 in the radial direction. It is configured to have a shape such that a gap (space) is formed between the surface of the second valve shaft 15b and the outer peripheral surface of the second valve shaft 15b located inside the shaft hole component 41 of the contour forming member 33 in the radial direction.
- the configuration and operation of the second valve shaft 15b, the second bush 21b, the second valve shaft hole 39 and its surroundings are the above-mentioned first valve shaft 15a, first bush 21a, first valve shaft hole. Since it is the same as the configuration and operation of 37 and its surroundings, the description thereof is omitted here.
- the present invention is not limited to the illustrated embodiment.
- the insert members 31 and 31 are provided around the first bearing hole 25 and the second bearing hole 27, and the first valve shaft hole 37 and the second valve shaft hole 39 are provided.
- the shaft hole reinforcing portions 35c and 35c are provided around the periphery, these are not essential configurations and may not be provided.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Valve Housings (AREA)
Abstract
Description
13 弁本体
13a 内部流路
15 弁軸
15a 第1の弁軸
15b 第2の弁軸
19 弁体
21 ブッシュ
21a 第1のブッシュ
21b 第2のブッシュ
25 第1の軸受孔
27 第2の軸受孔
31 インサート部材
31´ インサート部材
33 輪郭形成部材
35 芯材
37 第1の弁軸孔
39 第2の弁軸孔
41 軸孔構成部
45 くびれ部
47 くびれ部
Claims (4)
- 少なくとも表面が樹脂材料から形成されており且つ内部流路が形成されている弁本体と、該弁本体に回転可能に支持された弁軸と、前記弁軸に接続されて前記弁本体に回転可能に支持され且つ前記内部流路内に配置される弁体と、前記弁軸に外挿されるブッシュとを備えるバタフライバルブであって、
前記弁本体に前記ブッシュを介して前記弁軸を回転可能に支持する軸受孔が設けられ、前記軸受孔が前記内部流路に開口する開口部を有しており、
前記軸受孔と前記ブッシュとは、前記開口部に隣接する領域において、前記軸受孔の内周面と前記ブッシュの外周面との間に隙間が形成されるような形状を有していることを特徴とするバタフライバルブ。 - 前記開口部に隣接する前記ブッシュの部分の外周部に環状のくびれ部が設けられ、前記軸受孔の内周面と前記ブッシュの外周面との前記隙間が前記くびれ部によって形成されている、請求項1に記載のバタフライバルブ。
- 前記弁軸が前記弁体の回転軸線に沿って延びており、前記弁本体が前記弁本体の補強のための筒形状のインサート部材をさらに備え、前記インサート部材が、前記軸受孔から離間して前記軸受孔を取り囲むように配置され、前記回転軸線の方向に少なくとも前記くびれ部の一部の外側を取り囲むように延びている、請求項2に記載のバタフライバルブ。
- 前記隙間は、前記開口部に隣接して、前記軸受孔の内周面と前記ブッシュの外周面との前記隙間が前記開口部に近づくほど大きくなるように形成されたテーパ部分を含んでいる、請求項1から請求項3の何れか一項に記載のバタフライバルブ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/018,748 US20230323956A1 (en) | 2020-07-31 | 2021-07-29 | Butterfly valve |
EP21850575.8A EP4191099A1 (en) | 2020-07-31 | 2021-07-29 | Butterfly valve |
JP2022539554A JPWO2022025170A1 (ja) | 2020-07-31 | 2021-07-29 | |
CN202180058569.1A CN116113784A (zh) | 2020-07-31 | 2021-07-29 | 蝶形阀 |
KR1020237004361A KR20230042297A (ko) | 2020-07-31 | 2021-07-29 | 버터플라이 밸브 |
Applications Claiming Priority (2)
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JP2020-131219 | 2020-07-31 | ||
JP2020131219 | 2020-07-31 |
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WO2022025170A1 true WO2022025170A1 (ja) | 2022-02-03 |
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PCT/JP2021/028060 WO2022025170A1 (ja) | 2020-07-31 | 2021-07-29 | バタフライバルブ |
Country Status (7)
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US (1) | US20230323956A1 (ja) |
EP (1) | EP4191099A1 (ja) |
JP (1) | JPWO2022025170A1 (ja) |
KR (1) | KR20230042297A (ja) |
CN (1) | CN116113784A (ja) |
TW (1) | TW202206728A (ja) |
WO (1) | WO2022025170A1 (ja) |
Families Citing this family (1)
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JP1679877S (ja) * | 2020-07-17 | 2021-02-22 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5959576U (ja) * | 1982-10-14 | 1984-04-18 | 株式会社東芝 | 複葉弁 |
JPS601475A (ja) | 1983-06-15 | 1985-01-07 | Sekisui Chem Co Ltd | バタフライ弁 |
JPH09303575A (ja) | 1996-05-17 | 1997-11-25 | Tomoe Gijutsu Kenkyusho:Kk | 中心形バタフライ弁 |
JPH10169472A (ja) * | 1996-12-13 | 1998-06-23 | Fuji Oozx Inc | バタフライバルブ装置 |
JP2018013165A (ja) * | 2016-07-20 | 2018-01-25 | 旭有機材株式会社 | バタフライ弁 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013092250A (ja) * | 2011-10-07 | 2013-05-16 | Denso Corp | バルブ装置 |
JP6354724B2 (ja) * | 2015-10-02 | 2018-07-11 | 株式会社デンソー | 吸気制御装置 |
WO2020008010A1 (en) * | 2018-07-05 | 2020-01-09 | Emerson Automation Solutions Final Control Italia S.R.L. | Fluid flow control device having a draining body bearing |
DE102019101890B4 (de) * | 2019-01-25 | 2021-07-29 | M + S Armaturen Gmbh | Scheibenventil mit elektrisch leitendem Gleitlager |
-
2021
- 2021-06-24 TW TW110123149A patent/TW202206728A/zh unknown
- 2021-07-29 US US18/018,748 patent/US20230323956A1/en active Pending
- 2021-07-29 WO PCT/JP2021/028060 patent/WO2022025170A1/ja active Application Filing
- 2021-07-29 KR KR1020237004361A patent/KR20230042297A/ko unknown
- 2021-07-29 EP EP21850575.8A patent/EP4191099A1/en active Pending
- 2021-07-29 JP JP2022539554A patent/JPWO2022025170A1/ja active Pending
- 2021-07-29 CN CN202180058569.1A patent/CN116113784A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5959576U (ja) * | 1982-10-14 | 1984-04-18 | 株式会社東芝 | 複葉弁 |
JPS601475A (ja) | 1983-06-15 | 1985-01-07 | Sekisui Chem Co Ltd | バタフライ弁 |
JPH09303575A (ja) | 1996-05-17 | 1997-11-25 | Tomoe Gijutsu Kenkyusho:Kk | 中心形バタフライ弁 |
JPH10169472A (ja) * | 1996-12-13 | 1998-06-23 | Fuji Oozx Inc | バタフライバルブ装置 |
JP2018013165A (ja) * | 2016-07-20 | 2018-01-25 | 旭有機材株式会社 | バタフライ弁 |
Also Published As
Publication number | Publication date |
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CN116113784A (zh) | 2023-05-12 |
EP4191099A1 (en) | 2023-06-07 |
US20230323956A1 (en) | 2023-10-12 |
KR20230042297A (ko) | 2023-03-28 |
TW202206728A (zh) | 2022-02-16 |
JPWO2022025170A1 (ja) | 2022-02-03 |
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