WO2021132712A1 - ライニング型バタフライバルブとライニング型バタフライバルブの製造方法 - Google Patents

ライニング型バタフライバルブとライニング型バタフライバルブの製造方法 Download PDF

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Publication number
WO2021132712A1
WO2021132712A1 PCT/JP2020/049091 JP2020049091W WO2021132712A1 WO 2021132712 A1 WO2021132712 A1 WO 2021132712A1 JP 2020049091 W JP2020049091 W JP 2020049091W WO 2021132712 A1 WO2021132712 A1 WO 2021132712A1
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WIPO (PCT)
Prior art keywords
lining
core metal
thickness
outer peripheral
stem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/049091
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English (en)
French (fr)
Japanese (ja)
Inventor
孝統 宗吉
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Kitz Corp
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Kitz Corp
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Publication date
Application filed by Kitz Corp filed Critical Kitz Corp
Priority to US17/787,682 priority Critical patent/US12092224B2/en
Priority to CN202080090508.9A priority patent/CN114829814B/zh
Priority to JP2021540118A priority patent/JP7736563B2/ja
Publication of WO2021132712A1 publication Critical patent/WO2021132712A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0272—Construction of housing; Use of materials therefor of lift valves valves provided with a lining
    • 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 lining type butterfly valve having a resin lining on the valve body and the inner peripheral surface of the valve box, and a method for manufacturing the lining type butterfly valve.
  • a highly corrosive fluid flows in a plant such as a chemical, or as a butterfly valve for a food-related flow path
  • the metal core of the valve body is resin-lined, and a resin sheet ring is applied to the inner peripheral surface of the valve box.
  • a so-called lining type butterfly valve equipped with a plastic is often used.
  • fluororesin with excellent chemical resistance and heat resistance is usually used as the lining material, and this fluororesin is lined with a certain thickness to prevent the permeation and permeation of special fluids such as chemicals. Will be done.
  • fluororesin also has a property of poor elasticity, sufficient sealing property is ensured at the timing of valve closing, especially in the vicinity of the sealing portion between the valve blade side and the valve box side of the valve body. Therefore, it is required to prevent leakage over the entire circumference of the seal portion on the outer peripheral side of the valve body.
  • the applicant has applied for the butterfly valve of Patent Document 1.
  • the disc-shaped core metal is subjected to fluororesin dysclining, and this dysclining has gentle inclined surfaces on both sides, and this inclined surface is followed by the tip side of the valve blade.
  • a tapered surface having a predetermined angle is formed on the surface.
  • a sealing portion is provided between the tapered surfaces on both sides to press-seal the seat liner when the valve is closed.
  • a lining layer is coated on the outside of the reinforcing core metal, and the outer peripheral edge of the lining layer has a low-pressure seal portion having a small radius of curvature and a medium pressure having a large radius of curvature.
  • a two-stage seal portion having a different radius of curvature is formed, which is composed of a high-pressure seal portion.
  • the lining thickness is insufficient on one side of the core metal and the core metal is exposed on the surface, or the lining is on the other side.
  • the thickness may be formed more than necessary.
  • the fluid permeates or permeates during use.
  • the inclined surface or tapered surface on the front and back sides and the seal portion for pressure welding of the seat liner are provided with substantially the same thickness with respect to the core metal, and these thicknesses are the same.
  • the core metal In order to form a thick wall, it is necessary to form the core metal with high precision.
  • the molding of the resin tends to vary, and it is particularly difficult to form the vicinity of the outer periphery of the core metal with a predetermined seal width. Therefore, in the vicinity of the outer periphery of the core metal, the outer peripheral sealing surface is often formed so as to extend from the front and back surfaces.
  • the shape of the core metal is finely set in order to make the outer peripheral sealing surface a uniform predetermined width.
  • the present invention has been developed to solve the conventional problems, and an object of the present invention is a lining type butterfly valve having excellent chemical resistance and heat resistance, even when it is provided in a large diameter.
  • a method for manufacturing a lining type butterfly valve and a lining type butterfly valve that secures a lining layer having a sufficient thickness for the core metal and prevents fluid from penetrating or permeating without providing the core metal of the valve body with high precision. There is.
  • the invention according to claim 1 is a butterfly valve in which a valve body in which a core metal is coated with a lining layer is rotatably provided in a body by a stem, and the lining layer is a surface of the core metal.
  • a front and back lining portion provided on the back side and an outer peripheral lining portion provided on the outer peripheral side of the core metal are provided, and the front and back side lining portions are provided on the front and back sides of the core metal assuming that no warpage occurs.
  • the thickness obtained by adding the predetermined lining thickness and the same thickness as the maximum warp width assumed on the valve blade side of the core metal is provided at least at the outer peripheral end position of the core metal, and the outer peripheral lining portion is the outer circumference of the core metal.
  • a lining type butterfly valve in which the thickness from the end to the tip sealing surface of the outer peripheral end of the valve body is the sum of a predetermined lining thickness and a predetermined crushing thickness.
  • a convex portion protruding toward the outer peripheral side of the valve body is continuously formed in a substantially annular shape on the outer peripheral side of the valve body, and the outer peripheral side end surface of the valve body of the convex portion is a predetermined seal.
  • a lining type butterfly valve that serves as a wide tip sealing surface.
  • the core metal has an outer peripheral side surface portion on the outermost periphery thereof, and the outer peripheral side surface portion warps the core metal at the maximum warp width assumed on the valve blade side of the core metal. Even if it occurs, it is a lining type butterfly valve having a width so as to face the central portion in the thickness direction of the convex portion provided on the outer peripheral lining portion.
  • the invention according to claim 4 is a lining type butterfly valve in which each side surface portion of the convex portion with respect to the tip sealing surface is formed with an inclined surface having an angle of 10 ° or less with respect to the pressure contact sealing direction of the tip sealing surface.
  • a set of washers facing each other in the insertion direction of the stem is mounted in the shaft mounting portion into which the stem is loaded, and the set of washers is formed on the valve body from the stem side.
  • This is a lining type butterfly valve made of a combination of uneven shapes so that the surface pressure applied to the boss portion can be substantially the same even when the stem and the valve body are displaced or tilted.
  • the washer is composed of a convex washer having a convex spherical surface and a concave washer having a concave spherical surface in which the convex spherical surface is in surface contact, and the convex washer and the concave washer are in the shaft mounting portion. It is a lining type butterfly valve mounted in a pressed state in the opposite direction to each other by the elastic force of the mounted spring.
  • the invention according to claim 7 is a butterfly valve in which a valve body in which a core metal is coated with a lining layer is rotatably provided in a body by a stem, and the lining layers are provided on the front and back sides of the core metal, respectively.
  • the back side lining portion and the outer peripheral lining portion provided on the outer peripheral side of the core metal are provided, and the front and back side lining portions have at least a predetermined lining thickness on the front and back sides of the core metal and at least at the outer peripheral end position of the core metal.
  • the total of the front and back sides has a thickness obtained by multiplying the predetermined lining thickness by adding the same thickness as the maximum warp width assumed on the valve blade side of the core metal, and the outer peripheral lining portion is the outer peripheral end of the core metal.
  • a lining type butterfly valve in which the thickness from the outer peripheral end of the valve body to the tip sealing surface is the sum of a predetermined lining thickness and a predetermined crushing thickness.
  • the invention according to claim 8 is the method for manufacturing a lining type butterfly valve according to any one of claims 1 to 7 above, wherein the core metal is provided at a position facing the valve blade portion of the core metal. Insert the stem or stem jig into the stem insertion hole to fix the core metal and the stem or stem jig to each other, place the core metal in the molding space of the mold for lining layer molding, and place the core metal in the upper and lower stems or upper and lower parts.
  • a lining layer is formed on the surface of the core metal by introducing a material for forming a lining layer into the molding space while the core metal is fixed so as not to move in the molding space by holding the stem jig. This is a method for manufacturing a lining type butterfly valve.
  • the invention of claim 1 is a lining type butterfly valve having excellent chemical resistance and heat resistance, and the front and back lining portions of the valve body are each of the front and back sides of the core metal assuming that no warpage occurs. Since the thickness obtained by adding the predetermined lining thickness and the same thickness as the maximum warp width assumed on the valve blade side of the core metal is provided at least at the outer peripheral end position of the core metal, the core metal is actually warped. On the front and back sides of the valve body, at least a lining portion having a predetermined lining thickness is secured, while the outer peripheral lining portion has a thickness obtained by adding a predetermined lining thickness and a lining thickness having a predetermined crushing thickness.
  • the front and back side lining portions and the outer peripheral lining portion can be formed into a predetermined shape without finely setting the shape of the core metal, and in particular, the outer peripheral side can be easily formed to a predetermined thickness and a predetermined width, and the outer peripheral side has a sealing property.
  • a convex portion is formed on the outer peripheral lining portion, and the outer peripheral side end surface of the convex portion becomes a tip sealing surface having a predetermined sealing width, so that the outer diameter and thickness of the core metal are not affected.
  • the outer peripheral lining portion can be formed to the required thickness, and the convex portion can be provided with the predetermined seal width required for sealing. Therefore, even when the valve has a large diameter, the minimum necessary outer peripheral seal portion can be provided. It can be formed and its processing is easy.
  • the outer peripheral portion of the core metal serves as a support, and for that purpose, the core metal is warped.
  • the outer peripheral side surface of the core metal faces at least the center of the convex portion.
  • the width is set so as to face the central portion in the thickness direction of the convex portion provided on the outer peripheral lining portion, the convex portion and the outer peripheral side surface of the core metal are surely opposed to each other even if the core metal is warped. It is possible to secure the sealing property by the convex portion.
  • each side surface portion is formed with an inclined surface having an angle of 10 ° or less with respect to the pressure welding sealing direction of the tip sealing surface, variation in the sealing width after lining molding is suppressed. It becomes easy to form an outer peripheral seal portion having a uniform seal width on the outer periphery of the valve body. At the time of valve closing seal, the outer peripheral seal portion exerts a constant sealing surface pressure over the outer periphery of the valve body to reliably prevent fluid leakage.
  • the valve body side and the stem side are tilted or moved while the fluid pressure is applied by a set of washers, the valve body side and the stem side are maintained in a mounted state and are smooth. Maintains smooth rotation operability.
  • the washer is made of a combination of uneven shapes, and the same surface pressure as before tilting or moving occurs from the stem side to the boss part of the valve body, thereby ensuring the sealing property between these boss parts and the body side.
  • leakage is reliably prevented.
  • the convex spherical surface and the concave spherical surface are brought into close contact with each other due to the elastic force of the spring, so that the convex and concave washers are in close contact with each other over a wide range of contact positions.
  • the uniform surface pressure works, and excellent sealing performance between the boss part and the body side can be exhibited.
  • the invention of claim 7 is a lining type butterfly valve having excellent chemical resistance and heat resistance, and the front and back lining portions of the valve body are each of the front and back sides of the core metal assuming that no warpage occurs. Since the thickness obtained by adding the predetermined lining thickness and the same thickness as the maximum warp width assumed on the valve blade side of the core metal is provided at least at the outer peripheral end position of the core metal, the core metal is actually warped. On the front and back sides of the valve body, at least a lining portion having a predetermined lining thickness is secured, while the outer peripheral lining portion has a thickness obtained by adding a predetermined lining thickness and a lining thickness having a predetermined crushing thickness.
  • the front and back side lining portions and the outer peripheral lining portion can be formed into a predetermined shape without finely setting the shape of the core metal, and in particular, the outer peripheral side can be easily formed to a predetermined thickness and a predetermined width, and the outer peripheral side has a sealing property.
  • a mold for forming a lining layer is formed by inserting a stem or a stem jig into the core metal in advance and fixing the stem or the stem jig so that the core metal does not move by holding the stem or the stem jig.
  • FIG. 2B is an enlarged cross-sectional view of part A in FIG. 2B. It is a cross-sectional view which partially omitted the valve body. It is a partially enlarged cross-sectional view which shows the vicinity of the boss surface of FIG. It is a schematic explanatory drawing which showed the molding die of a butterfly valve.
  • FIG. 1 a central longitudinal sectional view of an embodiment of the lining type butterfly valve of the present invention
  • FIGS. 2 (a) and 2 (b) show a valve body
  • FIG. 3 shows FIG. 2 (b).
  • the enlarged sectional view of the part A in the above is shown.
  • valve body 1 the lining type butterfly valve (hereinafter referred to as valve body 1) is provided, for example, with a large diameter of about 350A to 600A, and is used as a part of a semiconductor manufacturing plant, a food-related pipeline, or the like.
  • the valve body 1 includes a valve body 2, a substantially tubular body 3, a seat liner 4, and a stem 5, and the stem 5 includes an upper stem 5a and a lower stem 5b.
  • the body 3 is formed of cast iron such as ductile cast iron, is provided in a vertically divisible manner having an upper body 3a and a lower body 3b, and is integrally fixable with a bolt (not shown).
  • the body 3 is provided with a flow path port 10 and a flange 11, and the inner peripheral side of the body 3 including these is covered with a seat liner 4.
  • a shaft mounting portion 12 is formed on the shaft mounting side of the stem 5 of the upper body 3a and the lower body 3b, a shaft mounting hole 13 is provided inside the shaft mounting portion 12, and the upper stem 5a is provided in each shaft mounting hole 13.
  • the lower stem 5b is attached respectively.
  • a polygonal square portion 5c is formed in the lower portion of the upper stem 5a.
  • the valve body 2 has a substantially disk-shaped core metal 20 formed of a metal material such as a stainless alloy on the center side, and the core metal 20 is covered with a lining layer (lining portion) 22, and the lining portion 22 is covered. Includes front and back lining portions 32 provided on the front and back sides of the core metal 20, and outer peripheral lining portions 33 provided on the outer peripheral side of the core metal 20.
  • a stem insertion hole 23 is formed on the top and bottom side of the valve body 2, and in particular, a square hole portion 24 into which the square portion 5c of the stem 5 can be fitted is formed in the stem insertion hole 23 on the top side.
  • the upper stem 5a is inserted into the stem insertion hole 23 on the top side so as to fit the square portion 5c into the square hole portion 24, and the lower stem 5b is inserted into the stem insertion hole 23 on the ground side.
  • the valve body 2 is mounted in the body 3 in a state of being axially mounted by the upper stem 5a and the lower stem 5b, and the flow path in the body can be opened and closed by the rotation of the upper stem 5a.
  • the lining portion (lining layer) 22 is provided with a resin material such as a fluororesin such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), and is provided on the front and back side lining portions 32 and the outer peripheral lining portion 33.
  • a boss portion 30 and a barrel lining portion are provided on the upper and lower sides (top and bottom sides).
  • the lining portion 22 is integrally covered with the outer periphery of the front and back surfaces of the core metal 20 by the communication portion 21 formed at an appropriate position of the core metal 20, and is formed in a state where the core metal 20 is prevented from being separated from the core metal 20. ..
  • the seal portion of the lining portion 22 of the valve body 2 with the seat liner 4 is composed of a boss portion 30 near the top and bottom side and a valve wing portion 31 which is a portion other than the boss portion 30, and the boss portion 30 forms a seal portion with the seat liner 4.
  • the sealing property on the top and bottom side from the valve opening to the valve closing state is ensured, and the sealing property on the valve wing side in the valve closed state with the seat liner 4 is ensured by the valve wing portion 31.
  • the boss portion 30 and the valve wing portion 31 exhibit the sealing property with the seat liner 4 over the entire inner peripheral surface.
  • the lining portion 22 when the lining portion 22 is formed, as the valve body 1 (core metal 20) has a larger diameter, more warpage is likely to occur on the valve blade side of the core metal 20 around the rotation shaft during casting.
  • the subsequent lining process is performed, the vicinity of the valve blade side of the core metal 20 bends downward due to its own weight and is easily deformed.
  • the front and back lining portions 32 are assumed to have a predetermined lining thickness and a valve blade side of the core metal 20 on the front and back sides of the core metal 20 assuming that no warpage occurs.
  • a thickness T1 obtained by adding the same thickness as the maximum warp width to be formed is provided so as to have at least the outer peripheral side position of the core metal 20.
  • the front and back lining portions 32 surely cover the front and back surfaces of the core metal 20 even on the valve blade side.
  • 2 and 3 are views showing an ideal state in which the core metal 20 is not warped, and the core metal 20 may be warped without actually being in such a state. .. The form in which the core metal 20 is warped will be described later with reference to FIG.
  • the front and back side lining portions 32 having a uniform thickness are provided on the front and back sides of the core metal 20, but the present invention is not necessarily limited to this. Since the warp of the core metal 20 tends to increase toward the valve blade side, the thickness may be increased toward the valve blade side accordingly.
  • each predetermined lining thickness on the front and back sides of the core metal 20 is at least 3 mm or more, and in this example, it is desirable. It is provided at about 3 mm.
  • the maximum warp width in the vicinity of the valve blade centering on the rotation axis of the core metal 20 is 2 mm, and the core corresponds to this. It is provided on the front and back sides of the gold 20 to be about 2 mm each.
  • the front and back lining portions 32 have a predetermined lining thickness of 3 mm on each of the front and back sides of the core metal 20 assuming that no warpage has occurred, and a thickness of 2 mm, which is the same as the maximum warp width assumed on the valve blade side of the core metal. It is provided by a thickness T1 of about 5 mm, which is the sum of the above.
  • the outer peripheral lining portion 33 is provided on the outer peripheral side of the core metal 20 by the thickness T2 from the outer peripheral end of the core metal 20 to the tip sealing surface 41 of the outer peripheral end of the valve body 2, and this thickness T2 is the outer circumference of the core metal 20.
  • the thickness is the sum of the predetermined lining thickness on the side and the predetermined crushing thickness, and the outer peripheral side of the core metal 20 is covered by the outer peripheral lining portion 33.
  • a predetermined lining thickness on the outer peripheral side of the valve body 2 is provided to be about 3 mm, and a predetermined crushing thickness is added to the predetermined lining thickness, thereby forming the outer peripheral lining portion 33.
  • the predetermined crushing thickness is set to about 1 mm, and the predetermined lining thickness and the predetermined crushing thickness ensure the thickness to be pressed against the seat liner 4 on the outer peripheral side of the valve body 2 and the thickness required for the crushing allowance.
  • the "predetermined lining thickness” refers to the minimum thickness of the lining layer required to prevent the fluid that the valve body 2 may come into contact with from penetrating to the core metal 20, and refers to the material and fluid of the lining layer. It depends on the type. It should be noted that this "minimum thickness” does not have to be a value proved by theory or proof, and may be a customary value that is the minimum required to prevent fluid from penetrating from the experience of those skilled in the art. Just do it. Further, the “predetermined crushing thickness” refers to the amount of irreversible crushing that can occur when the sealing portion of the valve body 2 repeatedly contacts the seat liner 4 and is crushed when the valve body 2 is opened and closed. This "predetermined crushing thickness” can be set in consideration of the size of the valve body 2, the material of the lining portion 22, the crushing amount of the seal portion, and the like.
  • the "maximum warp width assumed in the vicinity of the valve blade of the core metal 20" is the maximum in the expected range regarding the warp centered in the vicinity of the valve blade that may occur in the casting of the core metal 20 or the like.
  • a convex portion (annular convex portion 40) is provided on the seal side of the outer peripheral lining portion 33 at a predetermined height, and the annular convex portion 40 projects toward the outer peripheral side of the valve body 2 and is continuous with the outer periphery of the valve body 2.
  • the tip seal surface 41 is formed on the outer peripheral side end surface of the valve body 2 in the annular convex portion 40.
  • the tip seal surface 41 is provided with a predetermined seal width W.
  • the annular convex portion 40 is set to a predetermined height (predetermined crushing thickness) capable of maintaining sufficient sealing performance in consideration of irreversible leakage resulting from contact with the valve seat of the seat liner 4.
  • a predetermined height predetermined crushing thickness
  • the outer peripheral lining portion 33 a layer having a predetermined lining thickness is formed on the outer peripheral side of the core metal 20, and an annular convex portion 40 having a predetermined crushing thickness is further formed on the outer peripheral side.
  • the predetermined seal width W means a large width required for the tip seal surface 41, which is the main seal portion of the annular convex portion 40 with the seat liner 4, to obtain sufficient sealability.
  • the predetermined seal width W can also be a value customary to those skilled in the art.
  • the annular convex portion 40 of this example is formed at a height of about 1 mm by a predetermined seal width W of about 3 mm, and the entire outer peripheral lining portion 33 is the sum of the predetermined lining thickness (3 mm) and the predetermined crushing thickness (1 mm). It is provided to a certain thickness of about 4 mm.
  • side surface portions 42 are provided on both sides (upper and lower sides in the drawing) of the annular convex portion 40 with respect to the tip seal surface 41, and each side surface portion 42 is formed on the tip seal surface 41. It is formed by an inclined surface that is inclined with respect to the pressure welding seal direction.
  • the angle ⁇ of the tip sealing surface 41 with respect to the pressure welding sealing direction is set to 10 ° or less.
  • the height of the annular convex portion 40 is significantly higher than the planned height when the lining portion 22 is formed (larger to the right in FIG. 3). It can be formed and cut at a position required for the annular convex portion 40 after molding. At this time, when the angle ⁇ is 10 ° or less, the both side surface portions 42 of the annular convex portion before cutting are close to parallel to each other, and the change in the width between the both side surface portions 42 due to the cutting position can be reduced.
  • the required seal width W can be formed in.
  • the thickness of the front and back side lining portions 32 is larger than the thickness of the outer peripheral lining portion 33, but more preferably the front surface. It is preferable that the thickness of the lining portion from the back side lining portion 32 to the annular convex portion 40 is uniform. If there is a difference in the thickness of the lining portion, a shrinkage difference occurs due to the difference in the thickness during molding of the lining portion, stress is concentrated on the thinnest portion, and there is a possibility that the portion is easily broken. In particular, the root portion of the annular convex portion 40 is a place where stress is likely to be concentrated.
  • the thickness is made uniform. Stress concentration due to the difference in thickness is less likely to occur, and it becomes easier to suppress breakage of the lining portion 22 and the like.
  • An annular C surface portion 45 is formed between the tip sealing surface 41 and both side surface portions 42, and by providing the C surface portion 45 (C chamfer) in this way, the annular convex portion 40 comes into contact with the seat liner 4. Occasionally, it prevents an excessive force from being applied to a part of the annular convex portion 40. Further, the seal width W of the tip sealing surface 41 can be set to an arbitrary size by appropriately setting the size and angle of the C surface portion 45.
  • the thickness T1 of the front and back side lining portions 32, the thickness T2 of the outer peripheral lining portion 33, and the seal is large enough to reliably exhibit the sealing property when the valve is closed, and at this time, the outer peripheral lining portion 33 is suppressed to the minimum thickness necessary to maintain the sealing property.
  • FIG. 4 (a) shows a state in which the core metal of the present embodiment is not warped
  • FIG. 4 (b) shows the core metal of the present embodiment
  • FIG. 4 (c) shows a comparative example in a state where the warp is generated.
  • FIG. 4A shows a state in which the front and back side lining portions 32 are formed to have a uniform thickness with respect to the front and back sides of the core metal 20, and the outer peripheral lining portions 33 are formed to have a uniform thickness on the outer peripheral side. There is. In this case, the front and back side lining portions 32 and the outer peripheral lining portion 33 are secured to have a sufficient thickness.
  • the front and back side lining portions 32 add the thickness of the maximum warp width of the core metal 20 assumed in advance to the predetermined lining thickness. Since the core metal 20 has a thickness, at least a predetermined lining thickness is secured for the front and back lining portions 32 on the upper surface side of the core metal 20, and at least a predetermined lining thickness is secured for the outer peripheral lining portion 33, whereby fluid permeates. And permeation are prevented, and the sealing property to the seat liner 4 when the valve is closed is ensured.
  • the front and back surfaces of the core metal 20 are not provided with the same lining thickness as the maximum warp width assumed on the valve blade side, and the core metal 20 is used.
  • the lining thickness of the predetermined seal thickness is not added to the outer peripheral side of the.
  • the predetermined lining thickness is insufficient at the front and back lining portions on the upper surface side, and particularly in this example, since the core metal 20 is exposed from the upper part of the lining portion 25 on the front and back sides, the permeation and permeation of the fluid is prevented. It is difficult to secure the sealing property when the valve is closed because the thickness of the outer peripheral lining portion is not sufficient.
  • the annular convex portion 40 is crushed between the valve body 2 and the sealing surface on the body side, and the sealing property is exhibited.
  • the outer peripheral side surface portion 20a of the core metal 20 is reliably positioned at the position facing the annular convex portion 40.
  • the annular convex portion 40 is supported by the core metal 20.
  • the larger the diameter the more easily the core metal 20 is warped or bent.
  • the outer peripheral side surface portion 20a of the core metal 20 is displaced from the annular convex portion 40. If this is the case, the sealing property may not be sufficiently obtained.
  • the outer peripheral side surface portion 20a of the core metal 20 can face the central portion in the thickness direction of the annular convex portion 40 even if the core metal 20 is warped at the maximum warp width assumed on the valve blade side of the core metal 20. It has such a width.
  • the width of the outer peripheral side surface portion 20a is preferably larger than 4 mm. Even if the core metal 20 is warped by a maximum of 2 mm, the central portion of the annular convex portion 40 is located at a position facing the outer peripheral side surface portion 20a of the core metal 20, so that the core metal 20 has a sealing property due to warpage or bending. The decrease can be prevented.
  • FIG. 6 is a schematic explanatory view showing a molding die for a butterfly valve, and although not shown, a stem or a stem jig is inserted into a stem insertion hole, and the stem or the stem jig is held by the lower mold. doing.
  • the core metal 20 is prepared, and an upper and lower stem jigs (not shown) having the same shape as the stem 5 or the stem are inserted into the stem insertion holes 23 of the upper stem 5a and the lower stem 5b of the core metal 20, respectively. Then, the core metal 20 is fixed (see FIG. 1 and the like for the stem insertion hole 23 of the core metal 20).
  • the lower metal of the molding die (mold) 100 is held while holding the upper and lower stems 5a and 5b or the upper and lower stem jigs (hereinafter, stem jigs).
  • the core metal 20 is arranged in a predetermined resin molding molding region D of the mold 100b.
  • the upper and lower stems 5a and 5b or the stem jig is fixed by a holding member or the like so that the core metal 20 does not move in the rotation direction.
  • the holding member may be fixed by any method as long as the core metal 20 does not rotate, and may be, for example, a holding member that fixes the upper and lower stems 5a and 5b or the stem jigs so as to sandwich them from both sides.
  • a holding member that is integrated with the mold by providing a stem holding recess or the like in the mold may be used.
  • the upper mold 100a is covered from above the lower mold 100b, and the mold 100 is fixed with a fixing member (not shown) or the like.
  • a space S for forming the lining portion 22 is provided around the core metal 20 between the upper mold 100a, the lower mold 100b, and the region where the core metal 20 is arranged.
  • the resin material 300 is extruded by the extrusion member 201, and the resin material 300 is injected (introduced) into the space S from the injection port 100c provided in the mold 100.
  • the resin material 300 is cured to form a lining portion 22 that covers the core metal 20.
  • the mold 100 is provided with an annular step portion 100d, and the resin material 300 is press-fitted into the annular step portion 100d to form an annular convex portion 40 on the outer peripheral side of the lining layer 22 of the core metal 20. Can be done.
  • the core metal 20 on which the lining layer is formed is taken out from the mold 100, and an unnecessary portion is cut by the annular convex portion 40 formed on the outer periphery of the valve body to obtain a predetermined seal width W.
  • a lining type butterfly valve having a tip sealing surface 41 having the above can be manufactured.
  • the core metal 20 can be arranged at an accurate position in the molding region D in the mold 100, so that a lining layer is formed. It is possible to prevent distortion and misalignment during the process, and it is easy to form the lining portion 22 having a required thickness.
  • the core metal 20 tends to warp or bend more easily than the small-diameter butterfly valve, and even if the core metal warps or bends, the lining has the required thickness.
  • the shape of the lining portion 22 is set to satisfy a predetermined condition so that the portion 22 can be formed, and when the lining portion 22 is molded, the position of the core metal 20 in the molding region in the mold is accurately aligned. Is especially important.
  • the upper and lower stems 5a and 5b fixed to the core metal 20, the stem jig, and the like are fixedly held, and the core metal 20 can be accurately aligned in the mold 100.
  • the boss portion 30 on the top and bottom side of the valve body is arranged in a pressure contact seal state on the boss surface 4d formed on the top and bottom side of the seat liner 4 mounted on the body 3, and the boss portion 30 and the boss surface 4d are arranged.
  • the sealing property at the boss portion from the valve open to the valve closed state is ensured.
  • the seat liner 4 is provided with a resin material such as PFA, which is the same material as the lining portion 22 of the valve body 2, and is coated on the inner peripheral side of the body 3 as described above to have high corrosion resistance. It is provided so that it can exhibit heat resistance.
  • the seat liner 4 has an annular portion 4a mounted on the inner peripheral side of the body 3 and a flange portion 4b projecting from the outer peripheral edges of both ends of the annular portion 4a, and the upper and lower stems 5a of the annular portion 4a.
  • tubular lining portions 4c and 4c are integrally formed so as to project in the mounting direction of the stem 5, and the upper and lower stems 5a and 5b are mounted on these tubular lining portions 4c.
  • a washer 51, a ring body 52, a sealing bush 53, an O-ring 54, and a cylindrical bearing 55 are provided in the shaft mounting portion 12 into which the stems on the upper and lower sides of the body 3 are inserted, and each shaft is further provided.
  • a spring 56 made of a coil spring is mounted on the upper and lower sides of the mounting portion 12.
  • the valve body 2 is rotatably mounted in the body 3 on the upper and lower side, covered with the lining portion 22 and shaft-sealed by the shaft mounting portion 12.
  • a pair of washers 51 facing each other are mounted in the upper and lower shaft mounting portions 12 in the insertion direction of the upper stem 5a and the lower stem 5b, respectively.
  • This set of washers 51 is used when the surface pressure applied to the boss portion 30 of the valve body 2 from the stem 5 (upper and lower stems 5a, 5b) side causes a deviation or inclination between the stem 5 and the valve body 2.
  • it is composed of a combination of uneven shapes so that the state in which these are not generated can be made substantially the same.
  • the washer 51 is composed of a convex washer 60 and a concave washer 61.
  • the convex washer 60 is provided with a convex spherical surface 62 on one surface side
  • the concave washer 61 is provided with a concave spherical surface 63 on one surface side with which the convex washer 62 is in surface contact.
  • the convex washer 60 and the concave washer 61 are axes. Due to the elastic force of the spring 56 mounted in the mounting portion 12, the springs 56 are mounted in a pressed state in opposite directions to each other.
  • the mounting structure of the washer 51 is provided on the upper and lower shaft mounting portions 12 in a symmetrical mounting state.
  • valve body 2 When fluid pressure is applied to the valve body 2, the valve body 2 moves in that direction, and it is considered that the stem 5 (upper stem 5a, lower stem 5b) is tilted about the center position of each of the upper and lower bearings 55. Be done. Therefore, from the viewpoint of sliding on a spherical surface along the inclination of the stem 5, a virtual spherical surface formed at the position of the washer 51 with the center position of the upper and lower bearings 55 as the center position of the sphere is formed by the convex washer 60 and the concave washer. It is designed to match the spherical surface facing 61.
  • the convex spherical surface 62 and the concave spherical surface 63 are formed in a shape corresponding to this tilt.
  • the convex spherical surface 62 and the concave spherical surface 63 are formed into spherical shapes corresponding to the tilt at a maximum angle of 1 °.
  • the radius of the virtual sphere is 110 mm, and the convex sphere 62 and the concave sphere 63 are formed by this radius.
  • the convex spherical surface 62 and the concave spherical surface 63 are formed so as to easily slide with each other.
  • the inner and outer diameters of the convex washer 60 are slightly larger than the inner and outer diameters of the concave washer 61, respectively. It is provided small, and appropriate spaces are provided on the inner and outer peripheral sides of the convex washer 60 (not shown). Therefore, the convex washer 60 can easily swing in the circumferential direction with respect to the concave washer 61.
  • the bearing 55 is arranged between the spring 56 and the ring body 52, and the upper stem 5a and the lower stem 5b are supported by the bearing 55 in a rotatable and centered state in the vicinity of the O-ring 54, respectively.
  • the ring body 52 is provided with a cylindrical shape capable of strongly pressing the position near the outer circumference of the boss portion 30 of the valve body 2 from the upper side by using a stainless steel material, and the ring body 52 is in a state in which the valve body 2 can rotate.
  • the elastic force of the spring 56 is provided by the 52 through the bearing 55 so as to be transmitted to the valve body 2 side.
  • a bearing member 70 that rotatably supports the upper stem 5a is arranged on the upper side of the upper body 3a in a state of being locked by a holding ring 71, and the spring 56 can be repelled downward by the bearing member 70. It is held in a state of being.
  • the top member 72 is arranged in a state of being locked by the holding ring 71, and the bearing member 73 that rotatably supports the lower stem 5b is superposed on the top member 72.
  • the spring 56 is held in a state where it can be repelled upward through the bearing member 73.
  • the upper and lower springs 56 and 56 are repelled in two directions of the valve body by the bearing members 70 and 73 and the top member 72, respectively.
  • O-rings 74 and 74 for dustproofing and waterproofing are mounted on the inner and outer circumferences of the bearing member 70 and the top member 72, respectively.
  • the sealing bush 53 is formed of a resin material such as PTFE (polytetrafluoroethylene) containing carbon fiber, and is provided as a sealing portion between the ring body 52, the lining portion 22, and the sheet liner 4.
  • An annular collar portion 53a is formed on the lower side of the sealing bush 53 so as to be bent in the outer peripheral direction.
  • the end face side of the ring body 52 is provided so as to be in contact with the collar portion 53a so that the ring body 52 presses the seat liner 4 through the collar portion 53a.
  • the seat liner 4 located at the top and bottom boss portions 30 of the valve body 2 is pressed through the ring body 52 by the elastic force of the spring 56 provided in the shaft mounting hole 13 of the body 3. Then, the sealing property of each of the top and bottom parts is secured.
  • the front and back side lining portions 32 and the outer peripheral lining portion 33 are further added with a partial thickness according to the warp of the core metal 20, or the maximum expected on the entire surface of the core metal 20.
  • a thickness corresponding to the warp width may be added.
  • the washer 51 can be arranged at an arbitrary position of the shaft mounting portion 12, and if the convex washer and the concave washer are slidable with each other, the washer 51 may have a tapered shape other than the spherical shape, or may be upper or lower. The positional relationship can be reversed. Further, these sets of washers may be provided so as not to swing.
  • a coil spring is used as the spring 56, but the present invention is not limited to this, and for example, a disc spring or the like may be used.
  • the valve main body 1 includes a lining portion 22 having a front and back side lining portion 32 and an outer peripheral lining portion 33, and the lining portion 22 covers the core metal 20. Therefore, the valve main body 1 Chemical resistance and heat resistance can be maintained even when the diameter of 1 is increased to a nominal diameter of about 350 A to 600 A.
  • the front and back side lining portions 32 have a predetermined lining thickness of 3 mm and a thickness of 2 mm, which is the same as the maximum warp width assumed on the valve blade side of the core metal 20, of 5 mm on each of the front and back sides of the core metal 20.
  • T1 the thickness of T1
  • the required lining thickness can be applied to the front and back surfaces of the core metal 20, and the lining portion 32 can reliably prevent the permeation and permeation of the fluid to ensure chemical resistance and heat resistance.
  • the outer peripheral lining portion 33 is set to a thickness T2 of 4 mm, which is the sum of a predetermined lining thickness of 3 mm on the outer peripheral side of the core metal 20 and a predetermined crushing thickness of 1 mm. Since the portion 40 is formed, the outer peripheral seal having the required seal width W can be easily obtained regardless of the thickness and taper shape of the outer peripheral end portion side of the core metal 20 without finely setting the shape of the core metal 20. Part can be formed.
  • the annular convex portion 40 is formed by the outer peripheral surface of the core metal 20 when the valve is closed.
  • the outer peripheral lining portion 33 including the outer peripheral lining portion 33 is pressed, and the tip sealing surface 41 of the annular convex portion 40 is pressed against the annular sealing surface 43 on the inner circumference of the seat liner 4 to reliably prevent leakage.
  • the outer peripheral side surface portion 20a of the core metal 20 has a width that can face the central portion in the thickness direction of the annular convex portion 40 even if the core metal 20 is warped at the maximum warp width assumed on the valve blade side of the core metal 20. Even if the warp of the core metal 20 is maximized, the outer peripheral side surface portion 20a and the central portion of the annular convex portion 40 always face each other, so that even if the core metal 20 is warped or bent. It is possible to prevent deterioration of sealing property.
  • the angle ⁇ of the side surface portions 42 of the annular convex portion 40 is provided by an inclined surface that is 10 ° with respect to the pressure contact sealing direction of the tip seal surface 41, the side surface portion 42 of the annular convex portion 40 is provided with the tip seal. It becomes close to parallel in relation to the pressure welding seal direction of the surface 41. Therefore, by forming the annular convex portion 40 to be long at the time of molding and cutting the excess portion thereof, it becomes easy to process the annular convex portion 40 into a predetermined seal width W.
  • a set of washers 51 composed of a convex washer 60 and a concave washer 61 is mounted in the upper and lower shaft mounting portions 12, and the convex spherical surface 62 and the concave spherical surface 63 are elastically impacted by the spring 56. It is in a state of being pressed by. As a result, even when the valve body 2 moves and the stem 5 is tilted, the convex spherical surface 62 slides with respect to the concave spherical surface 63, and the convex washer 60 is tilted together with the stem 5 while being concave. The predetermined orientation of the washer 61 is maintained.
  • the washer 51 converts the pressing force into a force in the direction perpendicular to the boss surface 4d. Without the washer 51, the pressing force of the spring 56 is tilted and applied to the boss surface 4d, so that the pressing force on the circular boss surface 4d does not match in the circumferential direction, and there is a possibility that leakage may occur at the weakened portion. On the other hand, since the pressing force is converted perpendicularly to the boss surface 4d by the washer 51, the force is uniformly applied in the circumferential direction of the boss surface 4d.
  • Valve body 2 Valve body 3
  • Body 4 Seat liner 5 Stem 5a Upper stem 5b Lower stem 12
  • Shaft mounting part 20 Core metal 20a
  • Outer peripheral side part 22
  • Lining part (lining layer) 23
  • Boss part 32
  • Front and back side lining part 33
  • Outer circumference lining part 40
  • Circular convex part (convex part) 41
  • Tip sealing surface 42
  • Inclined surface (side surface) Washer 56
  • Coil spring (spring) 60
  • Convex washer 61 Concave washer 62
  • Convex spherical surface 63
  • Mold for molding (mold) 100a Upper mold 100b Lower mold T1, T2 Thickness W
  • Predetermined seal width ⁇ Angle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
PCT/JP2020/049091 2019-12-27 2020-12-28 ライニング型バタフライバルブとライニング型バタフライバルブの製造方法 Ceased WO2021132712A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/787,682 US12092224B2 (en) 2019-12-27 2020-12-28 Lined butterfly valve and method for manufacturing lined butterfly valve
CN202080090508.9A CN114829814B (zh) 2019-12-27 2020-12-28 衬里型蝶阀和衬里型蝶阀的制造方法
JP2021540118A JP7736563B2 (ja) 2019-12-27 2020-12-28 ライニング型バタフライバルブとライニング型バタフライバルブの製造方法

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JP2019238703 2019-12-27
JP2019-238703 2019-12-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022025169A1 (ja) * 2020-07-31 2022-02-03 旭有機材株式会社 バタフライバルブ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6246862U (https=) * 1985-09-11 1987-03-23
JPH0258174U (https=) * 1988-10-21 1990-04-26
JPH10141514A (ja) * 1996-11-11 1998-05-29 Kurimoto Ltd バタフライ弁の弁体
JPH11218234A (ja) * 1998-01-29 1999-08-10 Kitz Corp バタフライバルブの弁体
JP2000170926A (ja) * 1998-12-07 2000-06-23 Kitz Corp バタフライ弁の弁体

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186682A (en) * 1963-11-12 1965-06-01 Betts Machine Company Butterfly valve disc and shaft sealing structure
US3565394A (en) * 1968-12-04 1971-02-23 Texas Valve Specialty Inc Butterfly valve
US3670071A (en) * 1970-07-16 1972-06-13 Xomox Corp Method of manufacture of a coated valving member
US3784157A (en) * 1972-05-15 1974-01-08 Fmc Corp Butterfly valve stem seal energizer
FR2255522B1 (https=) * 1973-12-19 1982-11-12 Amri
US4106170A (en) * 1976-11-03 1978-08-15 Rockwell International Corporation Method of assembling a coupling
DE2759000C2 (de) * 1977-12-30 1986-01-30 Müller, Fritz, 7118 Ingelfingen Verfahren zur Herstellung eines Klappenventils mit einer Absperrklappe
US4759530A (en) * 1984-11-14 1988-07-26 Neotecha Ag Stem and disc seal construction for butterfly valves
JPS6246862A (ja) 1985-08-23 1987-02-28 Canon Inc シ−ト材の仕分け積載装置
JPH0258174A (ja) 1988-08-24 1990-02-27 Dainippon Printing Co Ltd 色指示情報入力装置
JP3086783U (ja) 2001-12-18 2002-07-05 株式会社金沢シール 封印用接着シール
DE10226594A1 (de) * 2002-06-14 2004-01-08 Robert Bosch Gmbh Regelklappe mit eingespritzter Welle
US8430113B2 (en) * 2007-04-26 2013-04-30 Asahi Organic Chemicals Industry Co., Ltd. Method of manufacturing valve, and valve produced by the method
SG177551A1 (en) * 2009-07-09 2012-02-28 Advanced Tech Materials Substantially rigid collapsible liner and flexible gusseted or non-gusseted liners and methods of manufacturing the same and methods for limiting choke-off in liners
CN103438228B (zh) * 2013-08-20 2015-09-09 山东莱德机械有限公司 自密封中线蝶阀
CN208281521U (zh) * 2018-04-02 2018-12-25 兴锋阀门有限公司 一种高温烟道蝶阀
WO2019208910A1 (ko) * 2018-04-25 2019-10-31 Lee Sang Seon 버터플라이 밸브 및 이를 제조하는 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6246862U (https=) * 1985-09-11 1987-03-23
JPH0258174U (https=) * 1988-10-21 1990-04-26
JPH10141514A (ja) * 1996-11-11 1998-05-29 Kurimoto Ltd バタフライ弁の弁体
JPH11218234A (ja) * 1998-01-29 1999-08-10 Kitz Corp バタフライバルブの弁体
JP2000170926A (ja) * 1998-12-07 2000-06-23 Kitz Corp バタフライ弁の弁体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022025169A1 (ja) * 2020-07-31 2022-02-03 旭有機材株式会社 バタフライバルブ
US12140230B2 (en) 2020-07-31 2024-11-12 Asahi Yukizai Corporation Butterfly valve

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US20230008981A1 (en) 2023-01-12
CN114829814B (zh) 2026-04-10
JPWO2021132712A1 (https=) 2021-07-01
US12092224B2 (en) 2024-09-17
CN114829814A (zh) 2022-07-29
JP7736563B2 (ja) 2025-09-09

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