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
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/42—Valve seats
  • F16K1/422—Valve seats attachable by a threaded connection to the housing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/36—Valve members
  • F16K1/38—Valve members of conical shape
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/42—Valve seats

Definitions

• This invention relates to a fluid control valve, and in particular to a valve that is suitable for use as an on-off valve for controlling high-pressure fluid.
• the valve for high-pressure fluid described in Patent Document 1 shown in Figure 5 (1) has a valve body 101 in which a valve chamber 104 is formed that communicates with a fluid inlet 102 and a fluid outlet 103, and a seat member 106 is disposed in the valve chamber 104, on which a valve seat 107 is formed that abuts and separates from a valve element 114 to control the fluid.
• the seat member 106 is pressed upward from below by a pressing member 109 that is screwed into the valve body 101. This prevents fluid from leaking from the upper end of the seat member 106.
• Fig. 5(2) is a partially enlarged view of Fig. 5(1), and some of the parts described in Fig. 5(1) will not be described.
• the fluid passes from the fluid inlet 102 through the inlet passage 102a, passes through the inlet side communication passage 106a and the outlet side communication passage 106b formed in the sheet member 106, and flows out of the fluid outlet 103 through the outlet passage 103a.
• the object of the present invention was made in consideration of the above points, and its purpose is to provide a valve that is less susceptible to leakage between the seat member and the valve body when high-temperature, high-pressure fluid is flowing, etc.
• the present invention (1) which has been made to solve the above problems, is a valve that includes a valve body with a valve chamber that communicates with an inlet passage and an outlet passage for a fluid, an inlet side communicating passage that communicates with the inlet passage, an outlet side communicating passage that communicates with the outlet passage, and a valve seat formed on the periphery of the opening of the outlet side communicating passage, a cylindrical seat member disposed in the valve chamber, and a valve body that can be brought into and out of contact with the valve seat, and a male taper is formed on the valve seat side end of the seat member, and the male taper presses against a female taper formed in the valve chamber to form a seal.
• a male taper that tapers toward the valve seat is formed on the outer periphery of the seat member, and a female taper that tapers and engages with this male taper is formed in the valve chamber, and the seat member and the valve body are engaged by a taper engagement. Therefore, even if a force that reduces the engagement force acts on the seat member, a frictional force acts on the tapered slope, and the force that reduces the engagement force decreases with the sine of the taper angle, so that the sealing performance between the seat member and the valve body is unlikely to decrease. Details will be explained in the explanatory section of Figure 4.
• the present invention (2) is a valve according to the present invention (1), characterized in that the pressing force is generated by the engagement of a female thread engraved on the inner circumferential surface of the valve chamber with a male thread engraved on the outer circumferential surface of the seat member.
• the pressing force is generated by a simple structure in which a female thread engraved on the inner circumferential surface of the valve chamber and a male thread engraved on the outer circumferential surface of the seat member are screwed together, which reduces costs.
• the present invention (3) is the valve of the present invention (1), characterized in that the pressing force is generated by a seat member holder disposed below the seat member.
• the sealing performance can be maintained by applying a pressure to the seat member using a seat member holder.
• the present invention (4) is the valve of the present invention (3), characterized in that a seat retainer male screw is formed on the outer periphery of the seat retainer, and the seat retainer male screw and the female screw are screwed together to generate the pressing force.
• the pressing force is generated by a simple structure in which the male screw on the outer periphery of the seat retainer is screwed into the female screw on the valve body, which reduces costs.
• the present invention provides a valve that is less susceptible to leakage between the seat member and the valve body when high-temperature, high-pressure fluid is flowing through it.
• FIG. 1 is a partial cross-sectional view showing an entire valve according to an embodiment of the present invention.
• FIG. 2 is a partial cross-sectional view showing a part of the valve shown in FIG.
• FIG. 5 is a schematic diagram showing the state of force application etc., comparing a conventional sheet member with the sheet member of the present invention.
• FIG. FIG. 1 is a partial cross-sectional view showing an entire conventional valve.
• valve 1 shows a partial cross-sectional overall view of a valve according to an embodiment of the present invention.
• a valve element 4 attached to the tip of a stem 3 connected to an actuator 2 comes into contact with and separates from a seat member 30 on which a valve seat 31 is formed, to control the flow of a fluid.
• the seat member 30 is disposed inside a valve body 10 in which an inlet passage 11 and an outlet passage 12 are formed.
• the seat member 30 is required to maintain airtightness, abrasion resistance, thermal conductivity, and strength, and may be made of a material such as ordinary carbon or metal.
• a tapered eccentric screw 40 and a cover member 21 and a plug 20 for sealing with a gasket 22 are disposed below the seat member 30 , and the actuator 2 and the valve body 10 are joined by a fixing screw 5 .
• FIG. 2 is an enlarged view of the main parts of the valve in Figure 1. Some parts common to Figure 1 will not be described.
• a valve chamber 13 is formed inside the valve body 10, and a cylindrical seat member 30 is disposed inside the valve chamber 13.
• the valve chamber 13 has a large diameter portion 13a and a small diameter portion 13b.
• the large diameter portion 13a communicates with the inlet passage 11 through an opening formed on the inner circumferential surface, and communicates with the outlet passage 12 through an opening formed on the ceiling surface.
• the small diameter portion 13b has a female thread portion 14 engraved on the inner circumferential surface, and opens to the bottom surface of the valve body 10.
• the seat member 30 is inserted from the bottom surface of the valve body 10, and the male thread 34 engraved on the lower outer periphery of the seat member 30 is screwed into the female thread 14 to be fixed, and the male taper 35 formed on the upper end surface of the seat member is pressed against the female taper 16 formed on the ceiling surface of the large diameter portion 13a to form a seal.
• a tapered eccentric screw 40 screwed into the female thread 14 is disposed below the seat member 30, and the tapered eccentric screw 40 prevents the seat member 30 from loosening.
• the seat member 30 is formed with an inlet side communication passage 32 that opens on the outer circumferential surface of the seat member 30 and communicates with the inlet passage 11, and an outlet side communication passage 33 that opens at the upper end of the seat member 30 and communicates with the outlet passage 12.
• a valve seat 31 is formed on the periphery of the opening of the outlet side communication passage 33.
• the shape of the inlet side communication passage 32 is an ellipse that is long in the axial direction, and a total of four passages are formed, two that open on the left and right sides, and two that open on the front and back sides, as indicated by dotted lines, to provide a structure that can treat even large flow rates of fluid.
• An annular space 15 is formed between the inlet passage 11 and the inlet-side communication passage 32.
• the fluid flows in from the inlet passage 11, then circulates through this annular space 15, passes through the four inlet-side communication passages 32, passes through the outlet-side communication passage 33, and flows out of the outlet passage 12.
• FIG. 3 is a perspective view of the sheet member 30 used in the embodiment of FIGS.
• a male thread 34 is formed on the outer circumferential surface of the lower portion, and this male thread 34 screws into the female thread 14 of the valve body.
• An inlet side communicating passage 32 is formed in the center, and fluid passes through this inlet side communicating passage 32, flows through the outlet side communicating passage 33, and flows out from the outlet passage 12.
• a valve seat 31 is formed on the upper end surface.
• a male taper 35 is formed on the outer periphery of the upper part of the seat member 30, and a male taper abutment surface 36 abuts against the female taper abutment surface 17 (see Figure 2) to form a seal.
• Fig. 4(1) is a partial cross-sectional view of the valve chamber of a conventional valve
• Fig. 4(2) is a partial cross-sectional view of the valve chamber of the valve of the present invention
• Fig. 4(3) is an enlarged view of the area surrounded by the dotted line in Fig. 4(1)
• Fig. 4(4) is an enlarged view of the area surrounded by the dotted line in Fig. 4(2).
• Fig. 4 (4) of the valve of the present application if the load applied to the upper seal portion of the seat member 30 is Ft , when the load Ft is reduced by ⁇ Ft , the load Ft only needs to be reduced by sin ⁇ (where ⁇ is the taper half angle). Also, if the static friction coefficient between the valve body 10 and the seat member 30 is ⁇ , a force of ⁇ Ft sin ⁇ acts upward along the tapered surface, so the force required to maintain the seal between the seat member 30 and the valve body 10 is smaller than in the conventional structure.
• valve of the present invention can be used favorably as a valve that is less susceptible to leakage between the seat member and the valve body when passing high-temperature, high-pressure fluids, etc.
• valve body 11 inlet passage 12 outlet passage 13 valve chamber 14 female threaded portion 15 annular space 16 female taper 17 female taper abutment surface 20 plug 21 cover member 22 gasket 30 seat member 31 valve seat 32 inlet side communicating passage 33 outlet side communicating passage 34 male threaded portion 35 male taper 36 male taper abutment surface 40 tapered eccentric screw

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Lift Valve (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=91323292

Family Applications (1)

Country Status (4)

Citations (5)

Family Cites Families (1)

• 2023
  • 2023-08-29 JP JP2024561165A patent/JP7811412B2/ja active Active
  • 2023-08-29 DE DE112023004131.8T patent/DE112023004131T5/de active Pending
  • 2023-08-29 KR KR1020257011106A patent/KR20250065380A/ko active Pending
  • 2023-08-29 WO PCT/JP2023/031082 patent/WO2024116502A1/ja not_active Ceased

Patent Citations (5)

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