WO2022085289A1 - Diaphragm valve - Google Patents

Diaphragm valve Download PDF

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Publication number
WO2022085289A1
WO2022085289A1 PCT/JP2021/030486 JP2021030486W WO2022085289A1 WO 2022085289 A1 WO2022085289 A1 WO 2022085289A1 JP 2021030486 W JP2021030486 W JP 2021030486W WO 2022085289 A1 WO2022085289 A1 WO 2022085289A1
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WO
WIPO (PCT)
Prior art keywords
seat
holder
diaphragm
outer edge
sheet
Prior art date
Application number
PCT/JP2021/030486
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French (fr)
Japanese (ja)
Inventor
圭介 石橋
忠幸 薬師神
隆志 一法師
俊英 吉田
Original Assignee
株式会社フジキン
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Application filed by 株式会社フジキン filed Critical 株式会社フジキン
Priority to JP2022556439A priority Critical patent/JP7426149B2/en
Priority to KR1020237016413A priority patent/KR20230085201A/en
Publication of WO2022085289A1 publication Critical patent/WO2022085289A1/en

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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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
    • F16K7/16—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being mechanically actuated, e.g. by screw-spindle or cam
    • 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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm

Definitions

  • the present invention relates to a diaphragm valve, and more particularly to a diaphragm valve in which the seat is detachable and held in a seat holder.
  • the conventional diaphragm valve 70 as shown in FIG. 8 is formed on a body 71 having a fluid inflow passage 72 and a fluid outflow passage 73 inside, a seat 75 arranged on the periphery of the fluid passage, and an upper part of the body 71.
  • the diaphragm 76 which is arranged in the recess 74 and opens and closes the fluid passage by being pressed and separated from the seat 75, the bonnet 78 that presses the outer peripheral edge of the diaphragm 76 from above, and the actuator 80 move up and down.
  • the tip is provided with a stem 79 for deploying a diaphragm retainer 77 that presses the central portion of the diaphragm 76.
  • the seat 75 of the diaphragm valve 70 is fixed to the seat accommodating portion 81 formed at the bottom of the recess 74 by crimping, the seat 75 can be easily replaced if the seat 75 is worn out or the like. It is difficult and may require replacement of the body 71 itself.
  • the diaphragm valve 100 shown in FIG. 9 includes a body 102 having an inflow path 108 and an outflow path 109, a seat 103 detachably provided in the body 102 and located in the middle of the inflow path 108 and the outflow path 109.
  • a seat holder 104 provided on the outer periphery of the seat 103 in the body 102 to hold the seat 103, and a diaphragm 105 provided above the seat 103 and the seat holder 104 so that the central portion can abut and separate from the seat.
  • the seat 103 is provided between the driving means 106 provided above the diaphragm 105 to bring the diaphragm 105 into contact with and separated from the seat 103, and the seat holder 104 provided on the body 102 and located on the inner circumference of the seat 103.
  • a raised portion 107 for holding is provided.
  • the sheet 103 is housed in the sheet accommodating portion 111 formed in the raised portion 107.
  • the diaphragm 105 is pressed and fixed from above by the bonnet 116.
  • the seat holder 104 is housed in the seat holder accommodating portion 112.
  • the locking step 113 of the seat 103 and the locking step 114 of the seat holder 104 are aligned, and the seat 103 is detachably fixed to the body 102.
  • a communication hole 115 is formed in the sheet holder 104, and the fluid that has passed through the communication hole 115 flows out from the outflow path 109.
  • the seat 103 is replaceable, but there is a gap (clearance) between the seat accommodating portion 111 and the seat 103, and the seat holder accommodating portion 112 and the seat holder 104 There is also a clearance between them. Due to this clearance, the seat 103 and the seat holder 104 may be displaced from each other during valve operation, which causes wear of these members. In particular, the higher the pressure of the fluid being handled, the more likely this deviation will affect valve performance. In order not to cause this deviation, it is necessary to make the pressing force from above by the bonnet 116 very high, but there is a limit to that as well. Further, the diaphragm valve 100 shown in FIG.
  • valve body 9 has a valve body of a type in which a seat holder accommodating portion 112 is formed in the body 102 and a raised portion 107 for holding the seat 103 is formed, and the seat is fixed by crimping.
  • the shape is different. For this reason, it is necessary to manufacture a valve body different from the valve body used for the crimping type diaphragm valve that does not require replacement of the seat, which causes a problem that the yield deteriorates and it is difficult to reduce the product cost. there were.
  • An object of the present invention is a diaphragm valve having an easily replaceable seat, which is unlikely to shift the seat during valve operation and can be used as a valve body used for a crimp type diaphragm valve. It is to provide a diaphragm valve with a holder.
  • the present invention (1) is attached to and detached from a body provided with a fluid inflow passage and a fluid outflow passage, a recess forming a valve chamber in the body, and a peripheral edge of the bottom of the recess where the fluid inflow passage opens.
  • a sheet that is removably arranged, a sheet holder that is detachably arranged on the body and holds the sheet, a diaphragm that opens and closes the fluid inflow passage by being pressed and separated from the sheet, and the diaphragm.
  • the seat has a step on the upper outer periphery and the seat holder is convex downward with a through hole through which the seat penetrates in the center. It is conical and has a flow hole on the slope through which fluid passes, the upper surface of the outer edge of the seat holder is in contact with the lower surface of the outer edge of the diaphragm, and the lower surface of the outer edge of the seat holder is the outer edge of the bottom of the recess.
  • the sheet holder is arranged so as to be in contact with the surface, the lower surface of the inner edge of the sheet holder is in contact with the upper surface on the large diameter side of the step of the sheet, and the sheet is pressed downward by the bonnet. It is a characteristic diaphragm valve.
  • the diaphragm valve described in Patent Document 1 is provided with a seat holder for fixing the seat, but the means for preventing the horizontal displacement is due to the frictional resistance caused by the pressing force from above by the bonnet. there were. Therefore, since the frictional resistance is small, it is not sufficient when the pressure of the fluid is large.
  • the diaphragm valve of the present invention (1) has a seat holder like the diaphragm valve described in Patent Document 1, and the number of component elements is the same as that of the diaphragm valve described in Patent Document 1, but the seat holder has a spring. It is different to have sex. It is a feature of the present invention (1) that the seat holder has a spring property.
  • the seat in the diaphragm valve of the present invention (1) has a step on the upper outer peripheral portion, and the seat holder has a downwardly convex conical ring shape having a through hole through which the seat penetrates in the center, and fluid flows on the slope.
  • the upper surface of the outer edge of the seat holder is in contact with the lower surface of the outer edge of the diaphragm, and the lower surface of the outer edge of the seat holder is in contact with the outer edge surface of the bottom of the recess.
  • the seat holder is arranged so that the lower surface of the inner edge of the seat holder is in contact with the upper surface on the large diameter side of the step of the seat and the seat is pressed downward by the bonnet.
  • the force from the top to the bottom by the bonnet bends the seat holder, and the natural height of the seat holder becomes smaller.
  • a force that tries to return to the original position is generated in the seat holder compressed in the height direction, and the generated force presses the sheet downward, so that the sheet is prevented from laterally displaced.
  • the present invention (2) is the diaphragm valve of the present invention (1), wherein the seat holder is a disc spring.
  • the diaphragm valve of the present invention (2) uses a disc spring that is generally used for the seat holder.
  • Belleville springs are widely used as parts of structural members, and by using this general-purpose product as a seat holder, the manufacturing cost can be reduced.
  • the seat can be easily replaced, and the seat can be prevented from laterally shifting while the valve is in operation. Further, since the seat holder has a downwardly convex conical ring shape and does not have a peculiar shape, it can also be used as a valve body used for a crimping type diaphragm valve.
  • Example 1 It is a partial cross-sectional view of Example 1 of the diaphragm valve with a seat holder.
  • the plan view (A) and the sectional view (B) of the seat holder used for the diaphragm valve of Example 1 are shown.
  • a perspective view (A) of another embodiment of the seat holder that can be used for the diaphragm valve with the seat holder and a plan view (B) of still another embodiment are shown.
  • It is an end view which shows the state just before attaching a sheet to a body.
  • sectional drawing which shows the state which arranged the seat holder in the body which attached the seat.
  • FIG. 1 is a partial cross-sectional view of a diaphragm valve with a seat holder according to the first embodiment of the present invention.
  • the diaphragm valve 1 includes a valve body 10 and an actuator 65.
  • a fluid inflow passage 11 and a fluid outflow passage 12 are formed in the valve body 10, a recess 13 including a valve chamber is formed, and a diaphragm 40 is arranged.
  • a diaphragm retainer 51 that presses the central portion of the diaphragm 40 is provided at the tip of the stem 50 that is moved up and down by the actuator 65.
  • the diaphragm 50 opens and closes the fluid inflow passage 11 in the body 10 by being pressed and separated from the sheet 20 detachably arranged on the peripheral edge of the fluid inflow passage 11 at the bottom of the recess 13 by the diaphragm retainer 51.
  • a sheet holder 30 for holding the sheet 20 is arranged around the sheet 20. The diaphragm 40 and the seat holder 30 are firmly fixed to the body 10 by applying a force from above by the bonnet 60.
  • FIG. 2 shows a plan view (A) and a cross-sectional view (B) of the seat holder used for the diaphragm valve of the first embodiment.
  • the seat holder 30 When the upper surface of the seat holder 30 is viewed, it has an annular shape, a through hole 31 is formed in the center, and the inner edge side surface of the through hole 31 abuts on the step 21 of the sheet 20 housed in the seat accommodating portion 16. Penetrate like.
  • the outer edge has an upper surface 33 of the outer edge, and a slope 36 is formed between the outer edge and the inner edge.
  • the slope 36 is provided with four flow holes 32 through which a fluid flows.
  • the number and shape of the flow holes are not limited to this embodiment, and various ones can be selected.
  • the number and shape of the flow holes are not limited to this embodiment, and various ones can be selected.
  • the lower surface 34 of the outer edge and the lower surface 35 of the inner edge appear.
  • the distance between the upper surface 33 of the outer edge and the lower surface 34 of the outer edge is reduced because it is pressed in the vertical direction by the bonnet 60 when it is set in the diaphragm valve 1.
  • the repulsive force causes the seat holder 30 to expand in the vertical direction, and the seat holder 30 exhibits springiness.
  • FIG. 3A shows a perspective view of a seat holder 30'of another embodiment that can be used for a diaphragm valve with a seat holder.
  • a through hole 31' is formed in the center, and 18 flow holes 32' are formed on the slope 36'. Between the flow hole 32'and the through hole 31', 18 flow grooves 37 are formed so as to connect the through hole 31'and the flow hole 32'.
  • the fluid can flow from the through hole 31'to the flow hole 32'and the flow groove 37 to the fluid outflow passage 12. Further, the lower surface 35'of the inner edge and the lower surface 34'of the outer edge are formed at the locations shown in FIG. Further, FIG.
  • 3B is a plan view of yet another seat holder 30, and a plurality of grooves 38 (four locations in FIG. Example) are formed from the through holes 31 of the seat holder 30 in FIG. 2A, and the seat holder 30 is formed.
  • the springiness of the is improved. Further, by providing the groove 38 and the distribution groove 37, the pressed portion of the sheet 20 does not reach the entire circumference, so that the rotation of the sheet 20 can be effectively prevented.
  • the spring strength of the seat holders 30 and 30'and the flow rate of the fluid per unit time vary depending on the number and size of the flow holes 32 and 32'and the flow grooves 37. Further, since the spring strength of the seat holders 30 and 30'can be adjusted by the thickness of the seat holders 30 and 30', the desired spring strength and the desired spring strength per unit time can be obtained by appropriately changing the combination of these parameters. It is possible to use the flow rate of the fluid.
  • FIG. 4 is an end view showing a state immediately before the seat 20 is attached to the body 10.
  • the body 10 is formed with a seat accommodating portion 16 for accommodating the seat 20.
  • the bottom of the recess 13 has a bottom 14 of the recess, the outer edge of which has an outer edge surface 15.
  • a protruding portion 17 is formed on the inner circumference near the bottom of the recess 13 to ensure the stability of the seat holder 30 during temporary assembly, but it is not always necessary to form the protruding portion 17. ..
  • a step 21 is formed on the outer peripheral side of the sheet 20, and an upper surface 22 of the step is formed at a position on the upper surface of the step 21.
  • the seat 20 is formed so that it can be accommodated in the seat accommodating portion 16 without press-fitting or the like, but the clearance is prevented from becoming too large.
  • the body 10 can also be used as a valve body used for a crimp type diaphragm valve.
  • FIG. 5 is a cross-sectional view showing a state in which the seat holder 30 is arranged on the body 10 in which the seat 30 is mounted on the seat accommodating portion 16. Utilizing the springiness of the seat holder 30, the outer periphery of the seat holder 30 is arranged so as to overcome the protrusion 17. The upper surface 33 of the outer edge is in contact with the lower surface of the protrusion 17, but it is not always necessary to be in contact with the lower surface depending on the design. There is a gap between the lower surface 34 of the outer edge and the outer edge surface 15. This gap is necessary for the seat holder 30 to have a spring property at this assembly stage.
  • FIG. 6 is a cross-sectional view showing a state in which the diaphragm 40 and the bonnet 60 are placed on the body 10 on which the seat holder 30 is arranged. Even in this assembly stage, there is a gap between the lower surface 34 of the outer edge and the outer edge surface 15. The outer surface of the lower end of the bonnet 60 is scraped to form a bonnet large diameter portion 61 and a bonnet small diameter portion 62, and a bonnet large diameter portion bottom surface 63 which is the bottom surface of the bonnet large diameter portion 61 is formed.
  • FIG. 7 is a cross-sectional view showing a state in which the diaphragm 40 and the seat holder 30 are installed in a completed state by pressing the bonnet 60 downward.
  • the lower surface 34 of the outer edge of the seat holder 30 is in contact with the outer edge surface 15 of the body 10, and the seat holder 30 is in a bent state. Due to the restoring force that tries to return to the original state from this bent state, the lower surface 35 of the inner edge of the seat holder 30 exerts a force that pushes the upper surface 22 of the step of the seat 20 downward, so that even when the valve is operating.
  • the seat does not come off, and lateral slippage and rotation are suppressed.
  • the diaphragm valve provided with the seat holder according to the present invention is less likely to cause lateral displacement of the seat even when a high-pressure fluid is passed, and the seat can be easily replaced.
  • Diaphragm valve 10 Body 11: Fluid inflow passage 12: Fluid outflow passage 13: Recess 14: Bottom of the recess 15: Outer edge surface 16: Seat accommodating portion 17: Protruding portion 20: Seat 21: Step 22: Step Top surfaces 30, 30': Sheet holders 31, 31': Through holes 32, 32': Flow holes 33: Outer edge upper surface 34, 34': Outer edge lower surface 35, 35': Inner edge lower surface 36, 36': Slope 37 : Flow groove 40: Diaphragm 50: Stem 51: Diaphragm presser 60: Bonnet 61: Bonnet large diameter 62: Bonnet small diameter 63: Bonnet large diameter bottom 65: Actuator 70, 100: Diaphragm valve 71, 102: Body 72, 108: Fluid inflow passage 73, 109: Fluid outflow passage 74: Recess 75, 103: Seat 76, 105: Diaphragm 77: Diaphragm retainer 78, 116: Bonnet 79, 117: Stem 80

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Lift Valve (AREA)

Abstract

Provided is a diaphragm valve with a seat holder having a low possibility that a seat is displaced during the operation of the valve. A diaphragm valve (1) comprises a body (10); a seat (20); a seat holder (30); a diaphragm (40); and a bonnet (60). The seat (20) has a step difference (21) in an upper-side outer peripheral portion. The seat holder (30) has a downwardly convex conical ring shape having a through hole (31), through which the seat (20) penetrates at the center, and is provided with a flow hole (32) in an inclined surface (36). An outer edge upper surface (33) of the seat holder (30) is brought into contact with an outer edge lower surface (34) of the diaphragm (40), and the outer edge lower surface (34) of the seat holder (30) is brought into contact with an outer edge surface (15) at the bottom of a recessed portion (13). The seat holder (30) is arranged so as to bring an inner edge lower surface (35) of the seat holder (30) into contact with a large-diameter-side upper surface (22) of the step difference (21) of the seat and to cause the bonnet (60) to press the seat (20) downward.

Description

ダイヤフラムバルブDiaphragm valve
　この発明は、ダイヤフラムバルブに関し、特に、シートが着脱可能とされてシートホルダに保持されたダイヤフラムバルブに関する。 The present invention relates to a diaphragm valve, and more particularly to a diaphragm valve in which the seat is detachable and held in a seat holder.
　図８に示すような従来のダイヤフラムバルブ７０は、流体流入通路７２及び流体流出通路７３を内部に備えるボディ７１と、流体通路の周縁に配置されたシート７５と、ボディ７１の上部に形成された凹所７４に配置され、シート７５に押圧・離間されることで流体通路の開閉を行うダイヤフラム７６と、ダイヤフラム７６の外周縁部を上方から押圧するボンネット７８と、アクチュエータ８０によって上下動させられ、先端にダイヤフラム７６の中央部を押圧するダイヤフラム押さえ７７を配備するステム７９とを備えているものが知られている。 The conventional diaphragm valve 70 as shown in FIG. 8 is formed on a body 71 having a fluid inflow passage 72 and a fluid outflow passage 73 inside, a seat 75 arranged on the periphery of the fluid passage, and an upper part of the body 71. The diaphragm 76, which is arranged in the recess 74 and opens and closes the fluid passage by being pressed and separated from the seat 75, the bonnet 78 that presses the outer peripheral edge of the diaphragm 76 from above, and the actuator 80 move up and down. It is known that the tip is provided with a stem 79 for deploying a diaphragm retainer 77 that presses the central portion of the diaphragm 76.
　ダイヤフラムバルブ７０のシート７５は、凹所７４の底に形成されたシート収容部８１に加締めによって固定されているので、シート７５の摩滅等があった場合、シート７５を容易に交換することが難しく、ボディ７１自体の交換が必要となる場合もある。 Since the seat 75 of the diaphragm valve 70 is fixed to the seat accommodating portion 81 formed at the bottom of the recess 74 by crimping, the seat 75 can be easily replaced if the seat 75 is worn out or the like. It is difficult and may require replacement of the body 71 itself.
　ダイヤフラムバルブ７０のシート７５が容易に交換できない問題を改善するためのダイヤフラムバルブとして、特許文献１に示すようなシートを保持するシートホルダがある。（図９参照） As a diaphragm valve for improving the problem that the seat 75 of the diaphragm valve 70 cannot be easily replaced, there is a seat holder for holding the seat as shown in Patent Document 1. (See Fig. 9)
　図９に示すダイヤフラムバルブ１００は、流入路１０８と流出路１０９とを備えたボディ１０２と、ボディ１０２内に着脱可能に設けられて流入路１０８と流出路１０９の途中に位置するシート１０３と、ボディ１０２内のシート１０３の外周に設けられてシート１０３を保持する為のシートホルダ１０４と、シート１０３とシートホルダ１０４の上方に設けられて中央部がシートに当接・離間可能なダイヤフラム１０５と、ダイヤフラム１０５の上方に設けられてダイヤフラム１０５をシート１０３に当接・離間させる駆動手段１０６と、ボディ１０２に設けられてシート１０３の内周に位置してシートホルダ１０４との間でシート１０３を保持する***部１０７と、が備えられている。 The diaphragm valve 100 shown in FIG. 9 includes a body 102 having an inflow path 108 and an outflow path 109, a seat 103 detachably provided in the body 102 and located in the middle of the inflow path 108 and the outflow path 109. A seat holder 104 provided on the outer periphery of the seat 103 in the body 102 to hold the seat 103, and a diaphragm 105 provided above the seat 103 and the seat holder 104 so that the central portion can abut and separate from the seat. , The seat 103 is provided between the driving means 106 provided above the diaphragm 105 to bring the diaphragm 105 into contact with and separated from the seat 103, and the seat holder 104 provided on the body 102 and located on the inner circumference of the seat 103. A raised portion 107 for holding is provided.
　シート１０３は、***部１０７に形成されたシート収容部１１１に収容されている。ダイヤフラム１０５は、ボンネット１１６によって上方から押圧されて固定されている。シートホルダ１０４は、シートホルダ収容部１１２内に収容されている。シート１０３の係止段部１１３とシートホルダ１０４の係止段部１１４とが合わせられて、シート１０３は、ボディ１０２に着脱可能に固定されている。シートホルダ１０４には、連通孔１１５が形成され、この連通孔１１５を通過した流体が流出路１０９から外部に流れ出る。 The sheet 103 is housed in the sheet accommodating portion 111 formed in the raised portion 107. The diaphragm 105 is pressed and fixed from above by the bonnet 116. The seat holder 104 is housed in the seat holder accommodating portion 112. The locking step 113 of the seat 103 and the locking step 114 of the seat holder 104 are aligned, and the seat 103 is detachably fixed to the body 102. A communication hole 115 is formed in the sheet holder 104, and the fluid that has passed through the communication hole 115 flows out from the outflow path 109.
特開２００３－４２３１４公報Japanese Patent Application Laid-Open No. 2003-42314
　図９の特許文献１に記載のバルブは、シート１０３が取り換え可能ではあるが、シート収容部１１１とシート１０３との間には隙間（クリアランス）があり、シートホルダ収容部１１２とシートホルダ１０４との間にもクリアランスがある。このクリアランスのためにシート１０３及びシートホルダ１０４とは、バルブ稼働中にずれを生じる場合があり、これらの部材の摩耗の原因となる。特に、取り扱う流体の圧力が高ければ高くなるほど、このずれが、バルブの性能に影響を与える可能性が高くなる。このずれを生じさせないためには、ボンネット１１６による上方からの押圧力を非常に高くする必要があるが、それにも限界がある。また、図９に示すダイヤフラムバルブ１００は、そのボディ１０２にはシートホルダ収容部１１２を形成するとともに、シート１０３を保持する***部１０７が形成され、加締めによってシートを固定するタイプのバルブボディと形状が異なる。このため、シートの交換が必要のない加締めタイプのダイヤフラムバルブに使用するバルブボディと異なるバルブボディを製作する必要があり、歩留まりが悪化するとともに、製品コストの低廉化が困難であるという問題もあった。 In the valve described in Patent Document 1 of FIG. 9, the seat 103 is replaceable, but there is a gap (clearance) between the seat accommodating portion 111 and the seat 103, and the seat holder accommodating portion 112 and the seat holder 104 There is also a clearance between them. Due to this clearance, the seat 103 and the seat holder 104 may be displaced from each other during valve operation, which causes wear of these members. In particular, the higher the pressure of the fluid being handled, the more likely this deviation will affect valve performance. In order not to cause this deviation, it is necessary to make the pressing force from above by the bonnet 116 very high, but there is a limit to that as well. Further, the diaphragm valve 100 shown in FIG. 9 has a valve body of a type in which a seat holder accommodating portion 112 is formed in the body 102 and a raised portion 107 for holding the seat 103 is formed, and the seat is fixed by crimping. The shape is different. For this reason, it is necessary to manufacture a valve body different from the valve body used for the crimping type diaphragm valve that does not require replacement of the seat, which causes a problem that the yield deteriorates and it is difficult to reduce the product cost. there were.
　この発明の目的は、容易に交換可能なシートを備えるダイヤフラムバルブであって、バルブ稼働中にシートがずれる可能性の低く、加締めタイプのダイヤフラムバルブに使用するバルブボディと兼用することのできるシートホルダ付きダイヤフラムバルブを提供することである。 An object of the present invention is a diaphragm valve having an easily replaceable seat, which is unlikely to shift the seat during valve operation and can be used as a valve body used for a crimp type diaphragm valve. It is to provide a diaphragm valve with a holder.
　本発明（１）は、流体流入通路及び流体流出通路が設けられたボディと、当該ボディ内に弁室を形成する凹所と、当該凹所の底の前記流体流入通路が開口する周縁に着脱可能に配置されたシートと、前記ボディに着脱可能に配置されて前記シートを保持するシートホルダと、前記シートに押圧・離間させられることで前記流体流入通路の開閉を行うダイヤフラムと、当該ダイヤフラムの外縁を上方から押圧するボンネットと、を備えているダイヤフラムバルブにおいて、前記シートは、上側外周部に段差を有し、前記シートホルダは、中央に前記シートが貫通する貫通孔を有する下方に凸の円錐環形状であって、斜面に流体が通る流通孔を備え、当該シートホルダの外縁の上面は前記ダイヤフラムの外縁の下面に接し、当該シートホルダの外縁の下面は、前記凹所の底の外縁面に接し、前記シートホルダは、当該シートホルダの内縁の下面が、前記シートの前記段差の大径側上面に接し、前記ボンネットによって、前記シートを下方に押圧するように配置されていることを特徴とするダイヤフラムバルブである。 The present invention (1) is attached to and detached from a body provided with a fluid inflow passage and a fluid outflow passage, a recess forming a valve chamber in the body, and a peripheral edge of the bottom of the recess where the fluid inflow passage opens. A sheet that is removably arranged, a sheet holder that is detachably arranged on the body and holds the sheet, a diaphragm that opens and closes the fluid inflow passage by being pressed and separated from the sheet, and the diaphragm. In a diaphragm valve comprising a bonnet that presses the outer edge from above, the seat has a step on the upper outer periphery and the seat holder is convex downward with a through hole through which the seat penetrates in the center. It is conical and has a flow hole on the slope through which fluid passes, the upper surface of the outer edge of the seat holder is in contact with the lower surface of the outer edge of the diaphragm, and the lower surface of the outer edge of the seat holder is the outer edge of the bottom of the recess. The sheet holder is arranged so as to be in contact with the surface, the lower surface of the inner edge of the sheet holder is in contact with the upper surface on the large diameter side of the step of the sheet, and the sheet is pressed downward by the bonnet. It is a characteristic diaphragm valve.
　特許文献１に記載のダイヤフラムバルブでは、シートを固定するためのシートホルダを備えているが、水平方向のずれを防ぐための手段は、ボンネットによる上方からの押圧力に起因する摩擦抵抗によるものであった。このため、摩擦抵抗力は小さいため、流体の圧力が大きくなると十分ではなかった。 The diaphragm valve described in Patent Document 1 is provided with a seat holder for fixing the seat, but the means for preventing the horizontal displacement is due to the frictional resistance caused by the pressing force from above by the bonnet. there were. Therefore, since the frictional resistance is small, it is not sufficient when the pressure of the fluid is large.
　本発明（１）のダイヤフラムバルブは、特許文献１に記載のダイヤフラムバルブと同じくシートホルダを備えており、部品要素の数は特許文献１に記載のダイヤフラムバルブと同じであるが、シートホルダにばね性を持たせていることが異なっている。このシートホルダにばね性を持たせていることが本発明（１）の特徴である。 The diaphragm valve of the present invention (1) has a seat holder like the diaphragm valve described in Patent Document 1, and the number of component elements is the same as that of the diaphragm valve described in Patent Document 1, but the seat holder has a spring. It is different to have sex. It is a feature of the present invention (1) that the seat holder has a spring property.
　本発明（１）のダイヤフラムバルブにおけるシートは、上側外周部に段差を有し、シートホルダは、中央にシートが貫通する貫通孔を有する下方に凸の円錐環形状であって、斜面に流体が通る流通孔を備え、シートホルダの外縁の上面はダイヤフラムの外縁の下面に接し、シートホルダの外縁の下面は、凹所の底の外縁面に接している。シートホルダは、シートホルダの内縁の下面が、前記シートの前記段差の大径側上面に接し、ボンネットによって、シートを下方に押圧するように配置されている。ボンネットによる上方から下方に向かう力は、シートホルダを撓ませ、シートホルダの自然高さは小さくなる。高さ方向に圧縮させられたシートホルダには、元に戻ろうとする力が発生し、この発生した力がシートを下方に押圧するため、シートの横ずれが防止される。 The seat in the diaphragm valve of the present invention (1) has a step on the upper outer peripheral portion, and the seat holder has a downwardly convex conical ring shape having a through hole through which the seat penetrates in the center, and fluid flows on the slope. The upper surface of the outer edge of the seat holder is in contact with the lower surface of the outer edge of the diaphragm, and the lower surface of the outer edge of the seat holder is in contact with the outer edge surface of the bottom of the recess. The seat holder is arranged so that the lower surface of the inner edge of the seat holder is in contact with the upper surface on the large diameter side of the step of the seat and the seat is pressed downward by the bonnet. The force from the top to the bottom by the bonnet bends the seat holder, and the natural height of the seat holder becomes smaller. A force that tries to return to the original position is generated in the seat holder compressed in the height direction, and the generated force presses the sheet downward, so that the sheet is prevented from laterally displaced.
　本発明（２）は、前記シートホルダが、皿ばねであることを特徴とする本発明（１）のダイヤフラムバルブである。 The present invention (2) is the diaphragm valve of the present invention (1), wherein the seat holder is a disc spring.
　本発明（２）のダイヤフラムバルブは、シートホルダが、一般に用いられる皿ばねを利用したものである。 The diaphragm valve of the present invention (2) uses a disc spring that is generally used for the seat holder.
　皿ばねは、構造部材の部品として汎用されており、この汎用品をシートホルダとして用いることによって製造コストを下げることができる。 Belleville springs are widely used as parts of structural members, and by using this general-purpose product as a seat holder, the manufacturing cost can be reduced.
　この発明のダイヤフラムバルブによると、シートが容易に取り換え可能であり、かつ、バルブ稼働中のシートの横ずれを防止することができる。また、シートホルダは、下方に凸の円錐環形状であり、特異な形状をしていないため、加締めタイプのダイヤフラムバルブに使用するバルブボディと兼用することができる。 According to the diaphragm valve of the present invention, the seat can be easily replaced, and the seat can be prevented from laterally shifting while the valve is in operation. Further, since the seat holder has a downwardly convex conical ring shape and does not have a peculiar shape, it can also be used as a valve body used for a crimping type diaphragm valve.
シートホルダ付きダイヤフラムバルブの実施例１の部分断面図である。It is a partial cross-sectional view of Example 1 of the diaphragm valve with a seat holder. 実施例１のダイヤフラムバルブに用いられるシートホルダの平面図（Ａ）と断面図（Ｂ）を示す。The plan view (A) and the sectional view (B) of the seat holder used for the diaphragm valve of Example 1 are shown. シートホルダ付きダイヤフラムバルブに用いることができるシートホルダの別の実施例の斜視図（Ａ）とさらに別の実施例の平面図（Ｂ）を示す。A perspective view (A) of another embodiment of the seat holder that can be used for the diaphragm valve with the seat holder and a plan view (B) of still another embodiment are shown. シートをボディに装着する直前の状態を示す端面図である。It is an end view which shows the state just before attaching a sheet to a body. シートが装着されたボディに、シートホルダを配置した状態を示す断面図である。It is sectional drawing which shows the state which arranged the seat holder in the body which attached the seat. シートホルダが配置されたボディに、ダイヤフラムとボンネットを配置した状態を示す断面図である。It is sectional drawing which shows the state which the diaphragm and the bonnet are arranged in the body which arranged the seat holder. ボンネットを下方に押圧して、ダイヤフラムとシートホルダを完成状態に設置した状態を示す断面図である。It is sectional drawing which shows the state which pressed the bonnet downward, and installed the diaphragm and a seat holder in a completed state. シートがボディに加締めによって固定されている従来型のダイヤフラムバルブを示す。Shown is a conventional diaphragm valve in which the seat is fixed to the body by crimping. シートがシートホルダによって保持されている特許文献１に記載の従来型のダイヤフラムバルブを示す。The conventional diaphragm valve described in Patent Document 1 in which a seat is held by a seat holder is shown.
　以下、図面を参照して、本発明の好適な実施例を例示的に詳しく説明する。但し、この実施例に記載されている構成部品の形状、その相対的配置等は特に特定的な記載がない限りは、この発明の範囲をそれに限定する趣旨ではなく、単なる説明例に過ぎない。また、便宜的に図面上での方向によって部材等の方向を上下左右と指称することがあるが、これらは本発明の範囲を限定するものではない。 Hereinafter, preferred embodiments of the present invention will be described in detail exemplary with reference to the drawings. However, unless there is a specific description, the shapes of the components and their relative arrangements described in this embodiment are not intended to limit the scope of the present invention to them, but are merely explanatory examples. Further, for convenience, the directions of the members and the like may be referred to as up, down, left, and right depending on the directions on the drawings, but these do not limit the scope of the present invention.
　図１は、この発明による実施例１のシートホルダ付きダイヤフラムバルブの部分断面図である。このダイヤフラムバルブ１は、バルブボディ１０と、アクチュエータ６５とを備えている。バルブボディ１０には、流体流入通路１１と流体流出通路１２が形成され、弁室を含む凹所１３が形成され、ダイヤフラム４０が配置されている。 FIG. 1 is a partial cross-sectional view of a diaphragm valve with a seat holder according to the first embodiment of the present invention. The diaphragm valve 1 includes a valve body 10 and an actuator 65. A fluid inflow passage 11 and a fluid outflow passage 12 are formed in the valve body 10, a recess 13 including a valve chamber is formed, and a diaphragm 40 is arranged.
　アクチュエータ６５によって上下動させられるステム５０の先端にはダイヤフラム４０の中央部を押圧するダイヤフラム押え５１が備えられている。ダイヤフラム５０は、ボディ１０内であって、凹所１３の底の流体流入通路１１の周縁に着脱可能に配置されたシート２０とダイヤフラム押え５１による押圧・離間させられることで流体流入通路１１の開閉を行う。シート２０の周囲に、シート２０を保持するシートホルダ３０が配置されている。ダイヤフラム４０及びシートホルダ３０は、ボンネット６０により上方から力が加えられて、ボディ１０にしっかりと固定させられている。 A diaphragm retainer 51 that presses the central portion of the diaphragm 40 is provided at the tip of the stem 50 that is moved up and down by the actuator 65. The diaphragm 50 opens and closes the fluid inflow passage 11 in the body 10 by being pressed and separated from the sheet 20 detachably arranged on the peripheral edge of the fluid inflow passage 11 at the bottom of the recess 13 by the diaphragm retainer 51. I do. A sheet holder 30 for holding the sheet 20 is arranged around the sheet 20. The diaphragm 40 and the seat holder 30 are firmly fixed to the body 10 by applying a force from above by the bonnet 60.
　図２は、実施例１のダイヤフラムバルブに用いられるシートホルダの平面図（Ａ）と断面図（Ｂ）を示す。シートホルダ３０は、上面を見ると、円環形状をしており、中央に貫通孔３１が形成され、この貫通孔３１の内縁側面をシート収容部１６に収容したシート２０の段差２１に当接するように貫入する。外縁には、外縁の上面３３があり、外縁と内縁の間は斜面３６が形成されている。斜面３６には流体が流れる流通孔３２が４つあけられている。この流通孔の数と形状はこの実施例に限られるものではなく種々のものを選択することができる。  FIG. 2 shows a plan view (A) and a cross-sectional view (B) of the seat holder used for the diaphragm valve of the first embodiment. When the upper surface of the seat holder 30 is viewed, it has an annular shape, a through hole 31 is formed in the center, and the inner edge side surface of the through hole 31 abuts on the step 21 of the sheet 20 housed in the seat accommodating portion 16. Penetrate like. The outer edge has an upper surface 33 of the outer edge, and a slope 36 is formed between the outer edge and the inner edge. The slope 36 is provided with four flow holes 32 through which a fluid flows. The number and shape of the flow holes are not limited to this embodiment, and various ones can be selected. The
　図２の断面図（Ｂ）を見ると、外縁の下面３４と内縁の下面３５が現れている。外縁の上面３３と外縁の下面３４との間の距離は、ダイヤフラムバルブ１にセットされる際には、ボンネット６０によって上下方向に押圧されるので縮められる。その反発力でシートホルダ３０は上下方向に拡がろうとして、シートホルダ３０にはばね性が発現する。 Looking at the cross-sectional view (B) of FIG. 2, the lower surface 34 of the outer edge and the lower surface 35 of the inner edge appear. The distance between the upper surface 33 of the outer edge and the lower surface 34 of the outer edge is reduced because it is pressed in the vertical direction by the bonnet 60 when it is set in the diaphragm valve 1. The repulsive force causes the seat holder 30 to expand in the vertical direction, and the seat holder 30 exhibits springiness.
　図３（Ａ）は、シートホルダ付きダイヤフラムバルブに用いることができる別の実施例のシートホルダ３０’の斜視図を示す。中央には貫通孔３１’が形成され、斜面３６’には１８個の流通孔３２’があけられている。流通孔３２’と貫通孔３１’との間は、１８本の流通溝３７が、貫通孔３１’と流通孔３２’をつなぐように形成されている。ダイヤフラムがシートから離間したとき流体は、貫通孔３１’から流通孔３２’と流通溝３７とを通過し、流体流出通路１２に流れることができる。また、内縁の下面３５’と外縁の下面３４’は、図３に示す箇所に形成されている。また、図３（Ｂ）はさらに別のシートホルダ３０の平面図で、図２（Ａ）のシートホルダ３０の貫通孔３１から複数（図例４箇所）の溝部３８が形成され、シートホルダ３０のばね性を向上させている。また溝部３８や流通溝３７を設けることで、シート２０の押圧箇所が全周とはならないことから、シート２０の回転を有効に防止することもできる。 FIG. 3A shows a perspective view of a seat holder 30'of another embodiment that can be used for a diaphragm valve with a seat holder. A through hole 31'is formed in the center, and 18 flow holes 32' are formed on the slope 36'. Between the flow hole 32'and the through hole 31', 18 flow grooves 37 are formed so as to connect the through hole 31'and the flow hole 32'. When the diaphragm is separated from the sheet, the fluid can flow from the through hole 31'to the flow hole 32'and the flow groove 37 to the fluid outflow passage 12. Further, the lower surface 35'of the inner edge and the lower surface 34'of the outer edge are formed at the locations shown in FIG. Further, FIG. 3B is a plan view of yet another seat holder 30, and a plurality of grooves 38 (four locations in FIG. Example) are formed from the through holes 31 of the seat holder 30 in FIG. 2A, and the seat holder 30 is formed. The springiness of the is improved. Further, by providing the groove 38 and the distribution groove 37, the pressed portion of the sheet 20 does not reach the entire circumference, so that the rotation of the sheet 20 can be effectively prevented.
　流通孔３２、３２’や流通溝３７の数や大きさにより、シートホルダ３０、３０’のばね強度と単位時間当たりの流体の流量は変化する。また、シートホルダ３０、３０’のばね強度は、シートホルダ３０、３０’の厚みによって調節することもできるので、これらのパラメータの組み合わせを適宜変更することによって、望ましいばね性強度と単位時間当たりの流体の流量とすることが可能となる。 The spring strength of the seat holders 30 and 30'and the flow rate of the fluid per unit time vary depending on the number and size of the flow holes 32 and 32'and the flow grooves 37. Further, since the spring strength of the seat holders 30 and 30'can be adjusted by the thickness of the seat holders 30 and 30', the desired spring strength and the desired spring strength per unit time can be obtained by appropriately changing the combination of these parameters. It is possible to use the flow rate of the fluid.
　図４は、シート２０をボディ１０に装着する直前の状態を示す端面図である。ボディ１０には、シート２０を収納するシート収容部１６が形成されている。凹所１３の底には凹所の底１４があり、その外縁には外縁面１５がある。本実施形態では、凹所１３の底近くの内周には突出部１７を形成し、仮組時のシートホルダ３０の安定性を担保しているが、必ずしも突出部１７を形成する必要はない。シート２０には、外周側に段差２１が形成され、段差２１の上面の位置に段差の上面２２が形成されている。シート２０は、シート収容部１６に圧入等をしなくとも納め入れることができるように形成されているが、クリアランスが大きくなりすぎないようにしてある。このボディ１０は、加締めタイプのダイヤフラムバルブに使用するバルブボディと兼用することができるものである。 FIG. 4 is an end view showing a state immediately before the seat 20 is attached to the body 10. The body 10 is formed with a seat accommodating portion 16 for accommodating the seat 20. The bottom of the recess 13 has a bottom 14 of the recess, the outer edge of which has an outer edge surface 15. In the present embodiment, a protruding portion 17 is formed on the inner circumference near the bottom of the recess 13 to ensure the stability of the seat holder 30 during temporary assembly, but it is not always necessary to form the protruding portion 17. .. A step 21 is formed on the outer peripheral side of the sheet 20, and an upper surface 22 of the step is formed at a position on the upper surface of the step 21. The seat 20 is formed so that it can be accommodated in the seat accommodating portion 16 without press-fitting or the like, but the clearance is prevented from becoming too large. The body 10 can also be used as a valve body used for a crimp type diaphragm valve.
　図５は、シート３０がシート収容部１６に装着されたボディ１０に、シートホルダ３０を配置した状態を示す断面図である。シートホルダ３０のばね性を利用して、シートホルダ３０の外周は突出部１７を乗り越えて配置されている。外縁の上面３３は、突出部１７の下面に接触しているが、設計によっては必ずしも接触させる必要はない。外縁の下面３４と、外縁面１５との間には隙間がある。この隙間は、この組み立て段階では、シートホルダ３０にばね性を持たせるために必要なものである。 FIG. 5 is a cross-sectional view showing a state in which the seat holder 30 is arranged on the body 10 in which the seat 30 is mounted on the seat accommodating portion 16. Utilizing the springiness of the seat holder 30, the outer periphery of the seat holder 30 is arranged so as to overcome the protrusion 17. The upper surface 33 of the outer edge is in contact with the lower surface of the protrusion 17, but it is not always necessary to be in contact with the lower surface depending on the design. There is a gap between the lower surface 34 of the outer edge and the outer edge surface 15. This gap is necessary for the seat holder 30 to have a spring property at this assembly stage.
　図６は、シートホルダ３０が配置されたボディ１０に、ダイヤフラム４０とボンネット６０を乗せて配置した状態を示す断面図である。この組み立て段階でも、外縁の下面３４と、外縁面１５との間には隙間がある。ボンネット６０は、下端部の外側面が削られ、ボンネット大径部６１とボンネット小径部６２が形成され、ボンネット大径部６１の底面であるボンネット大径部底面６３が形成されている。 FIG. 6 is a cross-sectional view showing a state in which the diaphragm 40 and the bonnet 60 are placed on the body 10 on which the seat holder 30 is arranged. Even in this assembly stage, there is a gap between the lower surface 34 of the outer edge and the outer edge surface 15. The outer surface of the lower end of the bonnet 60 is scraped to form a bonnet large diameter portion 61 and a bonnet small diameter portion 62, and a bonnet large diameter portion bottom surface 63 which is the bottom surface of the bonnet large diameter portion 61 is formed.
　図７は、ボンネット６０を下方に押圧して、ダイヤフラム４０とシートホルダ３０を完成状態に設置した状態を示す断面図である。シートホルダ３０の外縁の下面３４がボディ１０の外縁面１５と接触し、シートホルダ３０は、撓んでいる状態である。この撓んだ状態から元に戻ろうとする復元力によって、シートホルダ３０の内縁の下面３５がシート２０の段差の上面２２を下方に押し下げようとする力が働くので、バルブ稼働中であってもシートが抜けることはなく、また横ずれや回転が抑えられる。 FIG. 7 is a cross-sectional view showing a state in which the diaphragm 40 and the seat holder 30 are installed in a completed state by pressing the bonnet 60 downward. The lower surface 34 of the outer edge of the seat holder 30 is in contact with the outer edge surface 15 of the body 10, and the seat holder 30 is in a bent state. Due to the restoring force that tries to return to the original state from this bent state, the lower surface 35 of the inner edge of the seat holder 30 exerts a force that pushes the upper surface 22 of the step of the seat 20 downward, so that even when the valve is operating. The seat does not come off, and lateral slippage and rotation are suppressed.
　本国際出願は、２０２０年１０月２０日に出願した日本国特許出願２０２０－１７５８４０号に基づく優先権を主張するものであり、日本国特許出願２０２０－１７５８４０号の全内容を本国際出願に援用する。 This international application claims priority based on Japanese Patent Application No. 2020-175840 filed on October 20, 2020, and the entire contents of Japanese Patent Application No. 2020-175840 are incorporated into this international application. do.
　この発明によるシートホルダを備えるダイヤフラムバルブは、高圧の流体を流す場合であっても、シートの横ずれが起こりにくく、シートの交換も容易に行うことができる。 The diaphragm valve provided with the seat holder according to the present invention is less likely to cause lateral displacement of the seat even when a high-pressure fluid is passed, and the seat can be easily replaced.
１　：ダイヤフラムバルブ
１０：ボディ
１１：流体流入通路
１２：流体流出通路
１３：凹所
１４：凹所の底
１５：外縁面
１６：シート収容部
１７：突出部
２０：シート
２１：段差
２２：段差の上面
３０、３０’：シートホルダ
３１、３１’：貫通孔
３２、３２’：流通孔
３３：外縁の上面
３４、３４’：外縁の下面
３５、３５’：内縁の下面
３６、３６’：斜面
３７：流通溝
４０：ダイヤフラム
５０：ステム
５１：ダイヤフラム押え
６０：ボンネット
６１：ボンネット大径部
６２：ボンネット小径部
６３：ボンネット大径部底面
６５：アクチュエータ
７０、１００：ダイヤフラムバルブ
７１、１０２：ボディ
７２、１０８：流体流入通路
７３、１０９：流体流出通路
７４：凹所
７５、１０３：シート
７６、１０５：ダイヤフラム
７７：ダイヤフラム押え
７８、１１６：ボンネット
７９、１１７：ステム
８０：アクチュエータ
８１、１１１：シート収容部
１０４：シートホルダ
１０６：駆動手段
１０７：***部
１１０：弁室
１１２：シートホルダ収容部
１１３：係止段部
１１４：係止段部
１１５：連通孔 1: Diaphragm valve 10: Body 11: Fluid inflow passage 12: Fluid outflow passage 13: Recess 14: Bottom of the recess 15: Outer edge surface 16: Seat accommodating portion 17: Protruding portion 20: Seat 21: Step 22: Step Top surfaces 30, 30': Sheet holders 31, 31': Through holes 32, 32': Flow holes 33: Outer edge upper surface 34, 34': Outer edge lower surface 35, 35': Inner edge lower surface 36, 36': Slope 37 : Flow groove 40: Diaphragm 50: Stem 51: Diaphragm presser 60: Bonnet 61: Bonnet large diameter 62: Bonnet small diameter 63: Bonnet large diameter bottom 65: Actuator 70, 100: Diaphragm valve 71, 102: Body 72, 108: Fluid inflow passage 73, 109: Fluid outflow passage 74: Recess 75, 103: Seat 76, 105: Diaphragm 77: Diaphragm retainer 78, 116: Bonnet 79, 117: Stem 80: Actuator 81, 111: Seat accommodating portion 104: Seat holder 106: Drive means 107: Raised portion 110: Valve chamber 112: Seat holder accommodating portion 113: Locking step portion 114: Locking step portion 115: Communication hole

Claims (2)

  1. 　流体流入通路及び流体流出通路が設けられたボディと、当該ボディ内に弁室を形成する凹所と、当該凹所の底の前記流体流入通路が開口する周縁に着脱可能に配置されたシートと、前記ボディに着脱可能に配置されて前記シートを保持するシートホルダと、前記シートに押圧・離間させられることで前記流体流入通路の開閉を行うダイヤフラムと、当該ダイヤフラムの外縁を上方から押圧するボンネットと、を備えているダイヤフラムバルブにおいて、
    　前記シートは、上側外周部に段差を有し、
    　前記シートホルダは、中央に前記シートが貫通する貫通孔を有する下方に凸の円錐環形状であって、斜面に流体が通る流通孔を備え、当該シートホルダの外縁の上面は前記ダイヤフラムの外縁の下面に接し、当該シートホルダの外縁の下面は、前記凹所の底の外縁面に接し、
    　前記シートホルダは、当該シートホルダの内縁の下面が、前記シートの前記段差の大径側上面に接し、前記ボンネットによって、前記シートを下方に押圧するように配置されていることを特徴とするダイヤフラムバルブ。     A body provided with a fluid inflow passage and a fluid outflow passage, a recess forming a valve chamber in the body, and a sheet detachably arranged on the peripheral edge of the bottom of the recess where the fluid inflow passage opens. A seat holder that is detachably arranged on the body to hold the seat, a diaphragm that opens and closes the fluid inflow passage by being pressed and separated from the seat, and a bonnet that presses the outer edge of the diaphragm from above. And in the diaphragm valve equipped with
    The sheet has a step on the upper outer peripheral portion and has a step.
    The sheet holder has a downwardly convex conical ring shape having a through hole through which the sheet penetrates in the center, and has a flow hole through which a fluid passes on a slope, and the upper surface of the outer edge of the sheet holder is the outer edge of the diaphragm. It is in contact with the lower surface, and the lower surface of the outer edge of the seat holder is in contact with the outer edge surface of the bottom of the recess.
    The sheet holder is characterized in that the lower surface of the inner edge of the sheet holder is in contact with the upper surface on the large diameter side of the step of the sheet and is arranged so as to press the sheet downward by the bonnet. valve.
  2. 　前記シートホルダは、皿ばねであることを特徴とする請求項１に記載のダイヤフラムバルブ。
          The diaphragm valve according to claim 1, wherein the seat holder is a disc spring.
PCT/JP2021/030486 2020-10-20 2021-08-20 Diaphragm valve WO2022085289A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110140014A1 (en) * 2007-06-12 2011-06-16 Luxembourg Patent Company S.A. High pressure diaphragm valve with exchangeable seat assembly
KR20140105182A (en) * 2013-02-22 2014-09-01 이종천 Solenoid valve
JP2019108920A (en) * 2017-12-18 2019-07-04 株式会社キッツエスシーティー Diaphragm valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215286A (en) * 1992-05-26 1993-06-01 Nupro Company High pressure diaphragm valve
JPH0694142A (en) * 1992-09-14 1994-04-05 Motoyama Seisakusho:Kk Pneumatic function type metal diaphragm valve
JP4700234B2 (en) 2001-07-31 2011-06-15 株式会社フジキン Diaphragm valve
JP2010144765A (en) 2008-12-16 2010-07-01 Hamlet Motoyama Japan:Kk Diaphragm valve
JP6335926B2 (en) 2013-02-01 2018-05-30 スウエイジロク・カンパニー Diaphragm valve with welded diaphragm valve seat carrier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110140014A1 (en) * 2007-06-12 2011-06-16 Luxembourg Patent Company S.A. High pressure diaphragm valve with exchangeable seat assembly
KR20140105182A (en) * 2013-02-22 2014-09-01 이종천 Solenoid valve
JP2019108920A (en) * 2017-12-18 2019-07-04 株式会社キッツエスシーティー Diaphragm valve

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