KR101790959B1 - Diaphragm type valve for cryogenic - Google Patents

Diaphragm type valve for cryogenic Download PDF

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Publication number
KR101790959B1
KR101790959B1 KR1020150160326A KR20150160326A KR101790959B1 KR 101790959 B1 KR101790959 B1 KR 101790959B1 KR 1020150160326 A KR1020150160326 A KR 1020150160326A KR 20150160326 A KR20150160326 A KR 20150160326A KR 101790959 B1 KR101790959 B1 KR 101790959B1
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KR
South Korea
Prior art keywords
diaphragm
rod
sliding rod
valve
valve body
Prior art date
Application number
KR1020150160326A
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Korean (ko)
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KR20170056908A (en
Inventor
이중엽
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한국항공우주연구원
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Priority to KR1020150160326A priority Critical patent/KR101790959B1/en
Publication of KR20170056908A publication Critical patent/KR20170056908A/en
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Publication of KR101790959B1 publication Critical patent/KR101790959B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Details Of Valves (AREA)

Abstract

The present invention relates to a valve apparatus having a valve body having an inlet port and an outlet port, a sliding rod slidably installed on a rod guide formed in the valve body, A diaphragm actuator that is coupled to the valve body and linearly moves the sliding rod by deformation according to a pilot pressure, and a diaphragm actuator formed on the outer periphery of the sliding rod, A vent groove formed in the valve body for discharging a fluid in an outer space of the rod guide to the outside of the valve body, a vent groove formed in the valve body for allowing the fluid trapped inside the valve guide to leak into the outer space through the open end of the rod guide, Diaphragm-type cryogenic valves with holes It is time.

Description

Diaphragm type cryogenic valve {DIAPHRAGM TYPE VALVE FOR CRYOGENIC}

The present invention relates to a diaphragm valve operated by a diaphragm actuator, and more particularly to a diaphragm-type cryogenic valve suitable for interception and opening of a cryogenic fluid.

Generally, an actuator of a valve opens and closes a flow path of a target fluid by using a motor type, a piston type, a bellows type, a diaphragm type, or the like. When the valve operating distance (stroke) is short, diaphragm type is generally used. Diaphragm type is advantageous in that manufacturing is simple and cost is low. Diaphragm type is widely used as an actuator such as a regulator, an opening / closing valve, and a control valve.

The diaphragm type actuator is deformed by the pilot pressure supplied from the outside to move the sliding rod installed inside the valve so that the poppet provided in the sliding rod opens and closes the main flow path of the valve.

On the other hand, the valves used to open or close the propellant flow of the projectile engine must be able to stably shut off or open the flow of the cryogenic and high pressure propellant. When a diaphragm-type actuator is used, a phenomenon may occur in which a cryogenic fluid is trapped in a valve at a high pressure state through a gap between the sliding rod and the rod guide. When such a trap phenomenon occurs, If the valve can not be discharged, chattering (tremor phenomenon) may occur in the valve.

Patent Registration No. 10-0483466 (Apr. 26, 2005) Patent Registration No. 10-1194734 (October 19, 2012)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a diaphragm-type cryogenic valve having a structure capable of smoothly discharging a high-pressure fluid trapped in a valve.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

According to an aspect of the present invention, there is provided a valve apparatus including a valve body having an inlet port and an outlet port, a sliding rod slidably mounted on a rod guide formed in the valve body, A diaphragm actuator that is coupled to the valve body and linearly moves the sliding rod by deformation in accordance with the pilot pressure, A vent groove formed in the outer periphery of the rod guide for allowing the fluid trapped in the rod guide to leak into the outer space through the open end of the rod guide, And a vent hole for discharging the gas to the outside of the valve body A diaphragm-type cryogenic valve is disclosed.

According to the diaphragm-type cryogenic valve of the present invention, the vent grooves are formed along the longitudinal direction of the sliding rod, and a plurality of vent grooves may be formed on the outer circumference of the sliding rod.

According to the diaphragm-type cryogenic valve of the present invention, the piston head is coupled to the other end of the sliding rod, and the rod-engaging portion of the piston head contacts the rod guide in accordance with the operation of the diaphragm actuator, As shown in FIG. Here, in the rod coupling portion, a protrusion that contacts the bottom surface of the rod guide in a valve open state may be formed along the circumference of the sliding rod.

According to the diaphragm type cryogenic valve of the present invention, the diaphragm type actuator includes a support body having a pilot port coupled to the valve body and through which a pilot gas is introduced or discharged, and a support body which is joined along the periphery of the support body, And a diaphragm which is deformed by the diaphragm.

According to the diaphragm-type cryogenic valve of the present invention, the diaphragm includes: a horizontal support portion supporting the piston head; a bending portion bent in a vertical direction in the horizontal support portion; and a bending portion extending in a vertical direction at an end portion of the bending portion, And a vertical welded portion welded along the outer periphery. Here, the diaphragm may have a stacked structure of two layers.

According to the present invention having the above-described structure, it is possible to smoothly discharge the trap fluid in the valve when the valve is closed through the structure in which the vent groove is formed and the vent hole is formed in the valve body, The chattering phenomenon can be prevented from occurring.

Further, the diaphragm welded portion of the diaphragm type actuator may be formed at a position different from the bending portion, thereby minimizing the separation phenomenon of the diaphragm due to repeated operation of the diaphragm type actuator, thereby increasing the operating life of the diaphragm type actuator.

1 and 2 are cross-sectional views of a diaphragm-based cryogenic valve according to one embodiment of the present invention.
3 is a sectional view of the sliding rod along the line III-III in Fig.
FIG. 4 is an operational view of a diaphragm-type cryogenic valve according to an embodiment of the present invention; FIG.
5 is a cross-sectional view of the diaphragm actuator shown in Fig.

Hereinafter, a diaphragm-type cryogenic valve related to the present invention will be described in detail with reference to the drawings.

1 and 2 are sectional views of a diaphragm-type cryogenic valve according to an embodiment of the present invention, wherein FIG. 1 shows a valve closed state and FIG. 2 shows a valve opened state. And Fig. 3 is a sectional view of the sliding rod along the line III-III in Fig.

Referring to FIGS. 1 and 2, the diaphragm type cryogenic valve of the present embodiment includes a valve body 110, a sliding rod 120, a poppet 130, a diaphragm actuator 140, and the like.

The valve body 110 constitutes the outer appearance of the valve and has an inlet port 115 through which fluid flows and an outlet port through which fluid is discharged. Inside the valve body 110, a rod-shaped rod guide 118 is formed.

In this embodiment, the valve body 110 having the upper body 111 and the lower body 112 coupled to each other is illustrated, and the rod guide 118 is connected to the lower body 112 As shown in Fig. The upper cover 113 on which the inlet port 115 is formed is coupled to the upper body 111 on which the outlet port 116 is formed.

The sliding rod 120 is slidably installed on the rod guide 118 and configured to move linearly on the rod guide 118 in accordance with the operation of the diaphragm actuator 140.

The poppet 130 is provided at one end of the sliding rod 120 and opens and closes a flow path between the inlet port 115 and the outlet port 116 in accordance with the movement of the sliding rod 120. 1, when the poppet 130 having an enlarged diameter as compared with the sliding rod 120 is in contact with the supporting surface inside the valve body 110 (specifically, the upper body), the inlet port 115 and the outlet port 116 Is interrupted. 2, when the sliding rod 120 is moved upwards and the poppet 130 is separated from the supporting surface, the flow path between the inlet port 115 and the outlet port 116 is opened. A valve seat (seat) 135 of elastic material is provided on the support surface of the valve body 110 to which the poppet 130 makes contact so that leakage of the fluid can be minimized.

The diaphragm type actuator 140 is coupled to the valve body 110 and linearly moves the sliding rod 120 by deformation according to the pilot pressure from the outside. According to the present embodiment, the diaphragm actuator 140 is coupled to the lower support 114 coupled to the lower body 112.

A piston head 170 may be fixedly coupled to the other end of the sliding rod 120 and the piston head 170 may be vertically movable in a receiving space formed by the lower body 112 and the lower support 114 .

The piston head 170 is coupled with the sliding rod 120 through the rod engaging portion 175 and may have a shape protruding upward from the piston head 170. The sliding rod 120 is inserted and fixed in the rod coupling portion 175.

The diaphragm type actuator 140 supports the piston head 170, and the operation of the diaphragm type actuator 140 moves the piston head 170 upward. A spring 160 may be provided between the piston head 170 and the valve body 110 to return the sliding rod 120 to the original position when the pilot pressure is released. The spring 160 can be disposed in an outer space of the rod guide 118 formed in the upper body 111 and supports the bottom surface of the upper body 111 and the upper surface of the piston head 140 respectively.

The diaphragm actuator 140 includes a support 141 having a pilot port 142 through which a pilot gas is introduced or discharged and a diaphragm actuator 140 which is joined along the periphery of the support 141 and deformed by a pilot gas pressure And a diaphragm (143) which is made of a metal. The support 141 and the diaphragm 143 may be formed of a metal material so that they do not cause a problem in driving even when the cryogenic temperature is low. According to the present embodiment, the diaphragm 143 supports the bottom surface of the piston head 170.

Referring to FIG. 3, a vent groove 125 is formed on the outer circumference of the sliding rod 120. The bent grooves 125 are recessed from the outer periphery of the sliding rod 120 so that the fluid (for example, gas) trapped inside the rod guide 118 is guided to the open end of the rod guide 118 And leaks into the outer space through the opening.

 The vent grooves 125 are formed along the longitudinal direction of the sliding rod 120 and may be formed on the outer circumference of the sliding rod 120. For example, a plurality of bent grooves 125 may be formed at regular intervals along the outer circumferential direction of the sliding rod 120. Accordingly, the portion of the sliding rod 120 where the vent groove 125 is not formed is a portion supported by the rod guide 118, and the vent groove 125 provides a space through which the trap fluid moves.

Referring again to FIGS. 1 and 2, a vent hole 150 is formed in the valve body 110, specifically, the upper body 111. The vent hole 150 serves to discharge the fluid discharged to the outside of the rod guide 118 to the outside of the valve body 110 and to communicate with the drain port 155 of the valve body 110 . Here, it is preferable that the drain port 155 is formed in a different position (for example, the opposite direction) from the discharge port 116.

Hereinafter, the interception and opening operation of the diaphragm-type cryogenic valve described above will be described.

When the pilot gas is input through the pilot port 142 in the valve closed state as shown in FIG. 1, the diaphragm 143 is deformed upward by the pilot pressure to press the piston head 170.

Accordingly, the sliding rod 120 moves upward according to FIG. 2, and the poppet 130 is separated from the supporting surface of the valve body 110 or the seat 135 so that the gap between the inlet port 115 and the outlet port 116 The valve is opened to open the valve.

When the pilot gas is discharged from the diaphragm type actuator 140 in the valve open state, the pressure exerted by the diaphragm 143 on the piston head 170 is removed, whereby the piston head 170 and / The sliding rod 120 moves downward. Accordingly, the poppet 130 comes into contact with the supporting surface of the valve 110 or the seat 135, and is switched to the valve closed state.

In order to move the sliding rod 120, a clearance must be formed between the sliding rod 120 and the rod guide 118 at a predetermined interval. When the valve is opened, the fluid penetrates into the gap, Can be trapped in space. Such a trap phenomenon may cause chattering and the like. Hereinafter, the operating state for discharging the trapping fluid of the present invention will be described with reference to FIG.

Fig. 4 shows the valve closed state, and arrows show the movement path of the trapped fluid. The fluid trapped in the inner space of the rod guide 118 is moved downward through the vent groove 125 on the outer circumference of the sliding rod 120 and the space between the lower end of the rod guide 118 and the rod engaging portion 175 To the outside space of the rod guide 118. [ The gas discharged into the space outside the rod guide 118 is discharged to the outside through the vent hole 150 of the valve body 110.

When the diaphragm type actuator 140 is operated by the pilot gas in the valve closed state, the valve opening state is switched as described above, so that the rod engaging portion 175 contacts the rod guide 118, Thereby blocking the open end of the valve 118. Accordingly, in the valve open state, the fluid in the inner space of the rod guide 118 is blocked from being discharged to the outer space of the rod guide 118. That is, the trap fluid can be discharged to the outside only in the valve closing state.

The protruding portion 176 may protrude from the rod engaging portion 175 along the circumference of the sliding rod 155 and the protruding portion 176 contacts the bottom surface of the rod guide 118 in the valve open state to improve the sealability . The rod-engaging portion 175 and the protrusion 176 may be formed of a metal material so as to be suitable for a high-pressure environment.

5 is a cross-sectional view of the diaphragm actuator shown in Fig.

The diaphragm actuator 140 has a configuration including a support 141 having a pilot port 142 and a diaphragm 143 bonded to the support 141. As shown in Fig. According to the present embodiment, two diaphragms 143 can be used in a laminated form, thereby extending the service life of the diaphragm 143.

The diaphragm 143 includes a horizontal support 144 that supports the piston head 170, a bending portion 145 that bends vertically in the horizontal support 144, and a vertical weld that extends vertically at the end of the bend 146). ≪ / RTI > The bending portion 145 is deformed according to the input or discharge of the pilot gas to function as a hinge to cause the horizontal support portion 144 to be displaced. The end of the vertical weld 146 may be joined to the support 141 by welding along the periphery of the support 141.

As a result of analyzing the breakage tendency according to the repeated operation of the diaphragm type actuator 140, it was found that the welded portion of the diaphragm 143 was the weakest. The diaphragm actuator of the general type has a structure in which the welding portion and the bending portion coincide with each other. In this embodiment, however, the welding portion of the diaphragm 143 is formed at a position different from the bending portion 145. By thus forming the welded portion of the diaphragm 143 at a position different from the bending portion 145, separation phenomenon of the diaphragm 143 due to repetitive operation of the diaphragm actuator 140 can be minimized.

The diaphragm type cryogenic valve described above is not limited to the configuration and the method of the embodiments described above, but various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.

110: valve body 120: sliding rod
125: Bent groove 130: Poppet
140: Diaphragm type actuator 150: Vent hole
160: spring 170: piston head

Claims (7)

A valve body having an inlet port and an outlet port;
A sliding rod slidably installed on a rod guide formed in the valve body;
A poppet provided at one end of the sliding rod for opening and closing a flow path between the inlet port and the outlet port in accordance with the movement of the sliding rod;
A diaphragm actuator coupled to the valve body for linearly moving the sliding rod by deformation according to a pilot pressure;
A vent groove formed on the outer periphery of the sliding rod to allow the fluid trapped in the rod guide to leak into the outer space through the open end of the rod guide;
A vent hole formed in the valve body for discharging fluid in an outer space of the rod guide to the outside of the valve body; And
And a rod coupling portion coupled to the other end of the sliding rod,
Wherein the rod coupling portion is configured to contact the rod guide in accordance with the operation of the diaphragm type actuator to shut off the open end of the rod guide in a valve open state. The method according to claim 1,
Wherein the vent grooves are formed along the longitudinal direction of the sliding rod, and the vent grooves are formed on the outer circumference of the sliding rod in a plurality of the diaphragm-type cryogenic valves. delete The method according to claim 1,
Wherein the rod-engaging portion is formed with a protrusion that is in contact with the bottom surface of the rod guide when the valve is open, along a circumference of the sliding rod. 2. The diaphragm type actuator according to claim 1,
A support body coupled to the valve body and having a pilot port through which pilot gas is introduced or discharged; And
And a diaphragm which is joined along the outer periphery of the support and is deformed by the pressure of the pilot gas. 6. The diaphragm according to claim 5,
A horizontal support for supporting the piston head;
A bending portion bent in the vertical direction at the horizontal support portion; And
And a vertical welded portion extending vertically at an end of the bending portion and welded along an outer periphery of the support. 6. The method of claim 5,
Wherein the diaphragm has a laminated structure of two layers.

KR1020150160326A 2015-11-16 2015-11-16 Diaphragm type valve for cryogenic KR101790959B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150160326A KR101790959B1 (en) 2015-11-16 2015-11-16 Diaphragm type valve for cryogenic

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Application Number Priority Date Filing Date Title
KR1020150160326A KR101790959B1 (en) 2015-11-16 2015-11-16 Diaphragm type valve for cryogenic

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KR20170056908A KR20170056908A (en) 2017-05-24
KR101790959B1 true KR101790959B1 (en) 2017-10-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102039067B1 (en) * 2018-05-17 2019-10-31 한국항공우주연구원 Cryogenic valve apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200495026Y1 (en) * 2020-05-19 2022-02-16 하우드 주식회사 Water dividing device
KR20230167379A (en) 2021-04-06 2023-12-08 퓨엔스 가부시끼가이샤 Microparticles containing polyhydroxyalkanoic acid (PHA) and method for producing the same
KR102607296B1 (en) * 2021-08-11 2023-11-29 (주)테크니컬코리아 Diaphragm compressor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003106454A (en) * 2001-09-28 2003-04-09 Yoshitake Inc Pressure reducing valve
JP2010067856A (en) * 2008-09-11 2010-03-25 Kawasaki Precision Machinery Ltd Oil immersed solenoid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003106454A (en) * 2001-09-28 2003-04-09 Yoshitake Inc Pressure reducing valve
JP2010067856A (en) * 2008-09-11 2010-03-25 Kawasaki Precision Machinery Ltd Oil immersed solenoid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102039067B1 (en) * 2018-05-17 2019-10-31 한국항공우주연구원 Cryogenic valve apparatus

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