WO2021187692A1 - 밸브의 누설 차단장치 - Google Patents
밸브의 누설 차단장치 Download PDFInfo
- Publication number
- WO2021187692A1 WO2021187692A1 PCT/KR2020/012009 KR2020012009W WO2021187692A1 WO 2021187692 A1 WO2021187692 A1 WO 2021187692A1 KR 2020012009 W KR2020012009 W KR 2020012009W WO 2021187692 A1 WO2021187692 A1 WO 2021187692A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- pressure
- sealing oil
- bonnet
- valve stem
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/246—Combination of a sliding valve and a lift valve
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
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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
- F16K41/00—Spindle sealings
- F16K41/003—Spindle sealings by fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1228—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a stationary piston
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Definitions
- the present invention relates to a device for blocking leakage of a valve, and more particularly, to a device for effectively blocking leakage of a flowing fluid in a conduit through a gap on an outer circumferential surface of a valve stem.
- a fluid control valve for controlling the flow of the fluid or controlling the flow rate is installed and used in the pipe through which the fluid flows.
- valves include gate valves, globe valves, ball valves, butterfly valves, and angle valves.
- Examples of globe valves are disclosed in KR20-0395564 Y1 (Patent Document 1) and KR10-1197372 B1 (Patent Document 2).
- the conventional valve disclosed in Patent Documents 1 to 2 is provided with a packing device for blocking leakage of a fluid (process fluid passing through a pipe) through a gap on an outer peripheral surface of a valve stem.
- Conventional packing devices disclosed in Patent Documents 1 and 2 above use a sealing member such as gland packing, etc., and press the sealing member with a certain pressing means (eg, gland) for frictional contact between the sealing member and the valve member. It has a deformable structure.
- the plurality of articles By pressing the land packing 24 from the upper side with the packing pressing member 26, the pressurized gland packing 24 expands and deploys radially inward and outwardly, so that the inner/outer edges of the valve stem and the packing box are respectively extended. It has a structure that seals while closely adhering to the inner wall of the inner space.
- both radial edges of the gland packing 24, which are sealing members, are pressed against the outer circumferential surface of the valve stem 24 and the inner wall of the packing box, so that the valve stem rotates or moves up and down repeatedly.
- abrasion due to friction occurs in the pressing portion for sealing, and when wear occurs in the pressing portion, there is a problem in that the fluid leaks through the worn portion.
- the process must be stopped in order to replace the worn parts.
- the adhesion force changes at the portion where the gland packing is in close contact for sealing, so it is difficult to maintain stable sealing.
- the present invention can effectively block leakage of fluid without using a sealing member due to mechanical friction contact, and has a simple structure, so installation or repair work and use are convenient, and durability is high.
- An object of the present invention is to provide an excellent valve leakage shutoff device.
- the present invention for achieving the above object, as a valve leakage blocking device for blocking the leakage of fluid along the outer peripheral surface of the valve stem,
- An upper guide hole for closing the upper end of the bore of the bonnet and supporting the upper part of the valve stem extending through the bore of the bonnet by passing in the central axis direction, and the inner diameter of the bore of the bonnet below the upper guide hole an upper cover having an inner diameter smaller than the inner diameter of the upper guide hole and having a sealing oil chamber filled with pressurized oil;
- valve stem is inserted through the central through hole in the central axis direction, and flows through a gap between the outer peripheral surface of the valve stem and the inner peripheral surface of the central through hole on the bottom surface.
- a large-diameter portion having a lower pressure receiving surface of a relatively large cross-sectional area on which the pressure of the leaking fluid acts, and extending into the sealing oil chamber of the cover in the coaxial direction from the upper surface of the large-diameter portion, and having a cross-sectional area that is relatively smaller than the pressure receiving surface at the lower end of the large-diameter portion It is characterized in that it includes; a piston member including a plug.
- the upper cover may be fitted and coupled to the upper end of the bore of the bonnet, and the sealing oil chamber may extend in a central axis direction to constitute a lower portion of the sealing oil chamber.
- Sealing oil is introduced into the inner space through an inlet into the sealing oil chamber, and the inlet of the inlet is sealed with a plug member to fill the sealing oil chamber with the sealing oil.
- An O-ring for blocking fluid leakage may be installed on an inner wall of the central through hole of the piston member, an outer circumferential surface of the large-diameter portion of the piston member, and an inner wall of the upper guide hole of the upper cover, respectively, in a circumferential direction.
- the piston member in the bonnet pressurizes the liquid (oil) filled in the oil seal chamber by the pressure of the fluid leaking through the circumference of the valve stem to reduce the oil pressure in the chamber.
- the leaking fluid does not pass the high pressure oil of the sealing oil chamber, so it is a valve stem with a simple structure without using a mechanical friction blocking member such as a mechanical gland packing. It is possible to effectively block the leakage of fluid through the surroundings.
- the leakage blocking device of the present invention is excellent in durability because there is no phenomenon of weakening of sealing force over time.
- FIG. 1 is a combined cross-sectional view of a globe valve in which a gland packing device is installed.
- FIG. 2 is an enlarged detailed view of part 'A' in which the gland packing device of FIG. 1 is installed.
- FIG 3 is a longitudinal cross-sectional view of a globe valve provided with a leakage shutoff device of the present invention.
- FIG. 4 is an enlarged detailed view of part 'B' of FIG. 3 , and is a cross-sectional view of a state before the piston member of the leakage blocking device of the present invention presses the sealing oil of the sealing oil chamber.
- FIG. 5 is a longitudinal cross-sectional view of the globe valve in a state in which the piston member of the leakage shutoff device of the present invention rises in the bore to pressurize the sealing oil in the sealing oil chamber.
- FIG. 6 is an enlarged detailed view of part 'C' of FIG. 5 .
- valve leakage device according to the present invention will be described in detail with reference to the accompanying drawings.
- a globe valve is described in this embodiment, the present invention is not limited to the globe valve and may be applied to other types of valves.
- the valve assembly includes a valve body 10 having a flow path 11 and a valve seat 12 , seated on or separated from the valve seat 12 of the valve body 10 .
- the valve disk 15 for opening and closing the flow path 11 is connected to the lower end of the valve disk 15 to move the valve disk 15 to an open or closed position, and a valve stem having a handle 16 at the upper end. (20), a bonnet 30 coupled to the upper surface of the valve body 10 by a bolt 13 in a state surrounding the valve stem 20, and a bolt 41 to the upper surface of the bonnet 30 and an upper cover 40 .
- the bonnet 30 has a lower guide hole 31 for guiding the valve stem lower portion 21 by passing the valve stem 20 in the central axis direction, and the lower portion It is provided coaxially on the upper side of the guide hole 31 and has a bore 32 having a relatively larger diameter than the lower guide hole 31 .
- the upper cover 40 includes an upper guide hole 42 that passes through and supports the upper valve stem 22 extending through the bore 32 of the bonnet in the central axis direction, and the upper guide hole 42 . ), a sealing oil chamber ( 45) is provided.
- the upper cover 40 has a sleeve 43 extending from the bottom to be slide-inserted into the bore 32 of the bonnet 30 .
- An inlet 46 for filling the sealing oil L into the inner space of the sealing oil chamber 45 is provided, and an inlet of the inlet 46 is closed with a plug member 47 .
- a piston member 50 is slidably installed in the bore 32 of the bonnet 30 .
- the piston member 50 is provided with a central through-hole 51 through which the valve stem 20 is fitted.
- the piston member 50 includes a large-diameter portion 52 having a lower pressure receiving surface S1 having a relatively large cross-sectional area on its bottom surface. The pressure P of the fluid leaked through the gap between the outer peripheral surface of the valve stem 20 and the inner peripheral surface of the central through hole 51 acts on the lower pressure receiving surface S1 of the large diameter part 52 .
- a plug 53 having an upper pressure receiving surface S2 having a relatively smaller cross-sectional area than the lower pressure receiving surface S1 of the large-diameter portion 52 is provided at an upper portion of the piston member 50 .
- the plug 53 is inserted into the sealing oil chamber inside the sleeve 43 of the cover 40 ( 45) is slidably inserted inside.
- O-rings (O) are installed in each circumferential direction to block oil leakage.
- the fluid passing through the flow path 11 passes through the gap between the outer peripheral surface of the valve stem lower part 21 and the lower guide hole 31 (in the direction of the white thick arrow in FIG. 5). )
- the leaked fluid flows into the bore 32 of the bonnet 30 , and acts as a predetermined pressure P1 on the pressure receiving surface S1 at the lower end of the piston member 50 .
- the piston member 50 rises by the pressure P1 by the leaking fluid, and accordingly, the upper plug 53 of the piston member 50 rises to leak the pressure of the liquid in the sealing oil chamber 45 . Pressurize to a pressure (P2) higher than the pressure of the fluid. Accordingly, since the pressure P1 of the leaking fluid is lower than the pressure P2 of the pressurized oil in the sealing oil chamber 45, the fluid cannot flow into the sealing oil chamber 45 with a relatively high pressure, so oil leakage this is blocked
- the leakage blocking device according to the present invention has a structure that blocks leakage of the fluid passing through the valve by the pressure of the liquid (oil) in the sealing oil chamber 45, the stem packing compared to the conventional gland packing structure The stem packing friction can be significantly reduced.
- the stem packing friction force was measured for a valve having a valve stem having a diameter of 25.4 mm, and the stem packing friction force of the conventional V-Teflon packing and graphite packing was measured and shown in Table 1 below.
- the packing friction force for the packing structure of the present invention is significantly smaller than that of the conventional packing structure. And, the packing friction force for the packing structure of the present invention is 36% compared to the packing friction force (A) of the conventional V-Teflon packing structure, and only about 7.2% compared to the packing friction force (B) of the conventional graphite packing structure.
- the packing structure of the present invention requires a small amount of force to operate the valve because the packing friction force is small. This makes it possible to open and close the valve with a small operating force, so that automatic control by electronic control becomes easy.
- valve body 11 flow path
- valve disc 16 handle
- valve stem 21 lower valve stem
- O O-ring P1: Fluid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
Description
구분 | V-테프론 패킹(A) | graphite packing(B) | 본 발명의 패킹(C) |
패킹 마찰력(kgf) | 50 | 250 | 18 |
본 발명 패킹 구조의 패킹 마찰력/종래 패킹구조의 패킹 마찰력 | C/A=0.36 | C/B= 0.072 | C/C=1.0 |
Claims (5)
- 밸브 스템(20)의 외주면을 따라 유체의 누설을 차단하는 밸브 누설 차단장치로서,상기 밸브 스템(20)을 중심축방향으로 통과시켜 밸브 스템 하부(21)를 안내하는 하부 안내구멍(31)과, 상기 하부 안내구멍(31)의 상측에 동축으로 구비되고, 상기 하부 안내구멍(31)보다 상대적으로 큰 직경의 보어(32)를 구비한 보닛(30);상기 보닛(30)의 보어(32)의 상단에 결합되고, 상기 보닛(30)의 보어(32)를 통과하여 연장된 밸브 스템 상부(22)를 중심축방향으로 통과시켜 지지하는 상부 안내구멍(42)과, 상기 상부 안내 구멍(42)의 하측에, 상기 보닛(30)의 보어(32)의 내경보다 작고 상기 상부 안내구멍(42)의 내경 보다는 큰 내경을 가지고, 내부에는 가압된 씰링 오일(L)이 채워지는 씰링 오일 챔버(45)를 가진 상부 커버(40); 및상기 보닛(30)의 보어(32) 안에 슬라이드 이동가능하게 설치되고, 중심축방향의 중앙 관통구멍(51)에 상기 밸브 스템(20)이 관통하도록 끼워지고, 저면에는 상기 밸브 스템(20)의 외주면과 상기 중앙 관통구멍(51)의 내주면 사이의 틈새를 통하여 유동하는 누설 유체의 압력(P1)이 작용하는 상대적으로 큰 단면적의 하단 수압면(S1)이 형성된 대경부(52)와, 상기 대경부(52)의 상단면에서 동축방향으로 씰링 오일 챔버(45)안으로 연장되어 상기 씰링 오일 챔버(45)의 하단을 밀폐하고, 상기 대경부(52)의 하단 수압면(S1)보다 상대적으로 작은 단면적의 상단 수압면(S2)을 가지는 플러그(53)를 포함한 피스톤 부재(50);를 포함하는 밸브 누설 차단장치.
- 제1항에 있어서,상기 씰링 오일 챔버(45)는 내부 공간에 씰링 오일(L)을 유입하기 위한 주입구(46)를 구비하고, 상기 주입구(46)의 입구는 마개 부재(47)로 밀폐되는 것을 특징으로 하는 밸브 누설 차단장치.
- 제1항에 있어서,유로를 통과하는 유체가 상기 밸브 스템 하부(21)의 외주면과 하부 안내구멍(31) 사이의 틈새를 통하여 누설되어 보닛(30)의 보어(32) 안으로 유입되는 경우, 상기 피스톤 부재(50)의 하단 수압면(S2)에 작용하는 누설 유체의 압력(P1)에 의해 상기 피스톤 부재(50)의 상단 플러그(53)가 상승하여 상기 씰링 오일 챔버(45) 내의 오일의 압력(P2)을 누설 유체의 압력(P1)보다 높은 압력으로 가압함으로써 유체의 누설을 차단시키는 것을 특징으로 하는 밸브 누설 차단장치.
- 제1항에 있어서,상기 상부 커버(40)는 상기 보닛의 보어(32) 상단에 끼워져 결합되고, 중심축방향으로 상기 씰링 오일 챔버(45)가 연장되어 씰링 오일 챔버(45)의 하부를 구성하는 슬리브(43)를 구비한 것을 특징으로 하는 밸브 누설 차단장치.
- 제1항에 있어서,상기 피스톤 부재(50)의 중앙 관통구멍(51)의 내벽과, 상기 피스톤 부재(50)의 대경부(52)의 외주면과, 상기 상부 커버(40)의 상부 안내구멍(42)의 내벽에 각각 원주방향을 따라 오링(O)이 설치된 것을 특징으로 하는 밸브 누설 차단장치.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN202080098757.2A CN115298467B (zh) | 2020-03-20 | 2020-09-07 | 阀的泄漏阻断装置 |
US17/912,722 US11754198B2 (en) | 2020-03-20 | 2020-09-07 | Leakage blocking device of a valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020200034634A KR102181092B1 (ko) | 2020-03-20 | 2020-03-20 | 밸브의 누설 차단장치 |
KR10-2020-0034634 | 2020-03-20 |
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WO2021187692A1 true WO2021187692A1 (ko) | 2021-09-23 |
Family
ID=73697270
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PCT/KR2020/012009 WO2021187692A1 (ko) | 2020-03-20 | 2020-09-07 | 밸브의 누설 차단장치 |
Country Status (4)
Country | Link |
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US (1) | US11754198B2 (ko) |
KR (1) | KR102181092B1 (ko) |
CN (1) | CN115298467B (ko) |
WO (1) | WO2021187692A1 (ko) |
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US6161835A (en) * | 1998-08-17 | 2000-12-19 | Arbuckle; Donald P. | Integrated barrier fluid sealing apparatus with visual volume indicator |
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KR20130120174A (ko) * | 2012-04-25 | 2013-11-04 | 주식회사 케이에스테크 | 초저온 및 초고압용 컨트롤 밸브 |
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ITMI20142265A1 (it) * | 2014-12-29 | 2016-06-29 | Nuovo Pignone Srl | Dispositivo di tenuta per lo stelo di una valvola |
CN105508627B (zh) * | 2015-12-24 | 2017-11-14 | 华中科技大学 | 一种高压管路手动平衡式阀 |
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2020
- 2020-03-20 KR KR1020200034634A patent/KR102181092B1/ko active IP Right Grant
- 2020-09-07 CN CN202080098757.2A patent/CN115298467B/zh active Active
- 2020-09-07 WO PCT/KR2020/012009 patent/WO2021187692A1/ko active Application Filing
- 2020-09-07 US US17/912,722 patent/US11754198B2/en active Active
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JP2006234171A (ja) * | 1994-03-02 | 2006-09-07 | Fisher Controls Internatl Llc | 流体弁およびパッキン構造 |
US5979483A (en) * | 1998-06-24 | 1999-11-09 | Occidental Chemical Corporation | Valve assembly and method |
US6161835A (en) * | 1998-08-17 | 2000-12-19 | Arbuckle; Donald P. | Integrated barrier fluid sealing apparatus with visual volume indicator |
KR20070078761A (ko) * | 2007-07-12 | 2007-08-01 | 김용진 | 에어리크 방지 글로브 밸브 |
KR20140083576A (ko) * | 2012-12-26 | 2014-07-04 | 대신종합가스(주) | 밸브 |
Also Published As
Publication number | Publication date |
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US20230175609A1 (en) | 2023-06-08 |
CN115298467B (zh) | 2024-06-07 |
CN115298467A (zh) | 2022-11-04 |
US11754198B2 (en) | 2023-09-12 |
KR102181092B1 (ko) | 2020-11-20 |
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