KR20060100586A - Knife gate valve - Google Patents

Knife gate valve Download PDF

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Publication number
KR20060100586A
KR20060100586A KR1020050022232A KR20050022232A KR20060100586A KR 20060100586 A KR20060100586 A KR 20060100586A KR 1020050022232 A KR1020050022232 A KR 1020050022232A KR 20050022232 A KR20050022232 A KR 20050022232A KR 20060100586 A KR20060100586 A KR 20060100586A
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KR
South Korea
Prior art keywords
knife gate
rubber seat
air
rubber
gate valve
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KR1020050022232A
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Korean (ko)
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KR100809640B1 (en
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허영
김영포
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(주)현우산업
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Priority to KR1020050022232A priority Critical patent/KR100809640B1/en
Publication of KR20060100586A publication Critical patent/KR20060100586A/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
    • 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
    • F16K3/02—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 flat sealing faces; Packings therefor
    • 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
    • F16K25/00—Details relating to contact between valve members and seat
    • 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
    • F16K27/04—Construction of housing; Use of materials therefor of sliding 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
    • 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
    • F16K3/02—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 flat sealing faces; Packings therefor
    • F16K3/0227—Packings
    • 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
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle

Abstract

종래의 나이프케이트 밸브는 나이프게이트의 승하강에 의해 기밀을 유지하는 러버시트가 마모되거나 파손되어 러버시트의 수명이 짧아지는 문제가 있으며, 이로인해 유체의 기밀을 유지할 수 없는 문제가 있고, 또한 손상된 러버시트의 교체 및 수리에 따른 시간 및 비용이 너무 많이 소요되는 문제가 있다.Conventional knife gate valve has a problem that the rubber seat holding the airtight by the lifting and lowering of the knife gate is worn or damaged, shortening the life of the rubber seat, which can not maintain the airtightness of the fluid, and also damaged There is a problem that takes too much time and money according to the replacement and repair of the rubber seat.

본 발명은 유체를 원활하게 차단함과 동시에 나이프게이트의 승하강에 따라 기밀을 유지하는 러버시트가 파손되는 것을 방지하여 러버시트의 수명을 최대화하는데 목적을 갖는 것으로서, 본 발명은, 나이프게이트가 미끄럽접촉하는 밸브 몸체의 유로실 내측에 러버시트고정홀을 형성하고, 상기 러버시트고정홀에 에어를 주입, 배출함에 따라 수축팽창하는 러버시트를 구성함에 따라 상기한 목적이 달성된다.The present invention has the object of maximizing the life of the rubber sheet by preventing the rubber sheet which keeps the airtight as the knife gate rises and falls while at the same time smoothly blocking the fluid, the invention, the knife gate is slippery The above object is achieved by forming a rubber seat fixing hole in the passage chamber of the valve body in contact with the rubber contact, and forming a rubber seat that contracts and expands as air is injected into and discharged from the rubber seat fixing hole.

에어패킹, 에어홀더, 에어홀, 나이프게이트, 가이드공, 밸브, 러버시트 Air Packing, Air Holder, Air Hole, Knife Gate, Guide Ball, Valve, Rubber Seat

Description

나이프게이트 밸브용 수축팽창식 러버시트{KNIFE GATE VALVE}Shrink-Inflatable Rubber Seats for Knife Gate Valves {KNIFE GATE VALVE}

도 1은 종래의 나이프게이트 밸브의 러버시트 구조를 설명하기 위한 측단면도,1 is a side cross-sectional view for explaining the rubber seat structure of a conventional knife gate valve,

도 2는 본 발명에 따른 나이프게이트 밸브의 구조를 설명하기위한 측단면도,Figure 2 is a side cross-sectional view for explaining the structure of a knife gate valve according to the present invention,

도 3a, 3b는 나이프게이트가 하강하여 닫힐때 러버시트가 팽창되는 것을 설명하기 위한 정면도 및 측단면도,3A and 3B are front and side cross-sectional views for explaining that the rubber seat is expanded when the knife gate is lowered and closed;

도 4a, 4b는 나이프게이트가 하강되어 완전히 닫힌상태에서 러버시트가 팽창되어 나이프게이트에 밀착된 것을 설명하기 위한 정면도 및 측단면도,4A and 4B are front and side cross-sectional views for explaining that the rubber sheet is expanded and closely adhered to the knife gate while the knife gate is lowered and completely closed;

도 5은 나이프게이트가 오픈 또는 차단될때 패킹의 작동상태를 설명하기 위한 작동도.Figure 5 is an operation for explaining the operating state of the packing when the knife gate is open or blocked.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

20:몸체 21:유로실20: Body 21: Euro room

22:나이프게이트 30:러버시트22: knife gate 30: rubber seat

31:돌기 32:요홈31: projection 32: groove

33:에어홀 34:에어주,배공33: air hall 34: air

36:러버시트 고정홀 37:돌기고정홈36: Rubber seat fixing hole 37: Protrusion fixing groove

본 발명은 제지, 애쉬(ASH), 0.3㎛이하의 미세분말 분체, 슬러지, 유량조절 및 개폐가 요구되는 배관시스템에 사용되는 것으로, 더욱 상세하게는 몸체의 중앙에서 승하강 작동되어 유체의 흐름을 차단하는 나이프게이트의 외주면에 에어의 주입 또는 배출에 따라 수축팽창되는 러버시트를 형성하고, 나이프게이트의 승,하강작동에 의해 상기 러버시트를 수축팽창하도록하여 나이프게이트와 러버시트간의 간극을 최소화함으로서 유체를 완전히 차단하여 기밀유지가 원활히 이루어질 수 있도록 함과 동시에 러버시트의 수명을 향상시킬 수 있는 나이프게이트 밸브용 수축팽창식 러버시트에 관한 것이다.The present invention is used in the piping system that requires paper, ash (ASH), fine powder of less than 0.3㎛, sludge, flow rate control and opening and closing, and more specifically, the lifting and lowering operation at the center of the body to improve the flow of fluid By forming a rubber sheet that shrinks and expands according to the injection or discharge of air on the outer circumferential surface of the blocking knife gate, and minimizes the gap between the knife gate and the rubber sheet by shrinking and expanding the rubber sheet by the lifting and lowering operation of the knife gate. The present invention relates to a shrink-expandable rubber seat for a knife gate valve that can completely block the fluid to ensure airtightness and improve the life of the rubber seat.

통상적으로, 나이프 게이트 밸브라는 것은 분체, 제지 , 미세 분말 , 슬러지등의 유량제어 및 이러한 배관시스템의 개폐를 위해 사용되는 밸브로서 MSS-SP-81 규격에 따르면 나이프 게이트 밸브의 누수율은 40cc/minㆍinch로 규정하고 있다.In general, a knife gate valve is a valve used for controlling flow of powder, paper, fine powder, sludge, etc. and opening and closing of such a piping system. According to the MSS-SP-81 standard, a leak rate of a knife gate valve is 40 cc / min. It is prescribed in inches.

이러한 종래의 나이프게이트 밸브를 살펴보면, 첨부 도면 도 1에 도시된 바와 같이 몸체(1) 하부에 수평방향으로 유체가 통과하는 유로실(2)이 형성되어 있으며, 이와 수직으로 유체가 지나가는 유로실(2)을 승하강작동하여 개폐하는 나이프게이트(3)가 조립되어 있고, 상기 몸체(1) 상단에 지지대(4)가 체결부재로 결합되며, 상기 지지대(4)의 내부에는 나이프게이트(3)와 연결되어진 스템(5)이 내장되고, 상기 스템(5)의 상단으로 슬리브(8)가 결합되면서 핸들(9)과 끼워지며, 핸들(9)의 회전작동에 의해 나이프게이트(3)가 유로실(2)을 승하강하게 이루어진다.Referring to the conventional knife gate valve, as shown in FIG. 1, a flow path chamber 2 through which fluid passes in a horizontal direction is formed below the body 1, and a flow path chamber through which the fluid passes vertically ( 2) The knife gate (3) for opening and closing by lifting and lowering operation is assembled, and the support (4) is coupled to the upper end of the body (1) by a fastening member, the knife gate (3) inside the support (4) The stem 5 is connected to the built-in, and the sleeve 8 is coupled to the upper end of the stem (5) is fitted with the handle (9), the knife gate (3) by the rotation operation of the handle (9) flow path The chamber 2 is made to move up and down.

그리고, 상기 몸체(1)의 유로실(2) 내측으로 나이프게이트(3)가 밀착되는 부위에 나이프게이트(3)의 외주면과 대응되는 러버시트(11)이 끼워져 구성된다.The rubber seat 11 corresponding to the outer circumferential surface of the knife gate 3 is fitted to a portion where the knife gate 3 is in close contact with the flow chamber 2 of the body 1.

또한, 몸체(1)의 상단 중앙에는 패킹실(7)을 형성하여 패킹(6)이 끼워져 유체가 상부로 흘러나오는 것을 방지하게 이루어진다.In addition, a packing chamber 7 is formed at the center of the upper end of the body 1 so that the packing 6 is fitted to prevent the fluid from flowing upward.

이러한 나이프게이트밸브는 유체의 흐름을 차단 또는 개폐할때 상부의 핸들(9)을 일방향 또는 역방향으로 회전시켜 나이프게이트(3)을 승하강하면서 유로실(3)을 개방 또는 오픈할때 승하강 하는 나이프게이트(3)의 외주면이 러버시트(11)에 밀착되어 미끄럼접촉하게 되는데, 이때 나이프게이트(3)와 러버시트(11)간에 마찰이 심하게 일어나게된다.The knife gate valve rotates the upper handle 9 in one direction or the opposite direction when the flow of the fluid is blocked or opened, and ascends and lowers the knife gate 3 while the flow chamber 3 is opened or opened. The outer circumferential surface of the gate 3 is in close contact with the rubber sheet 11 to be in sliding contact. At this time, friction between the knife gate 3 and the rubber sheet 11 is severely generated.

상기와 같이 나이프게이트(3)가 러버시트(11)에 계속적으로 생기는 마찰에 의해 러버시트(11)가 몸체에서 밀려 나오는 현상이 발생하거나, 또한, 반복적으로 발생되는 마찰에 의해 러버시트(11)가 마모되어 나이프게이트(3)이 닫혀진다하더라도 마모된 러버시트(11)의 틈새로 유체가 누수되어 완전밀폐가 이루어지지 못하는 문제가 발생되었다.As described above, the rubber sheet 11 is pushed out of the body due to the friction generated by the knife gate 3 continuously in the rubber sheet 11, or the rubber sheet 11 is repeatedly caused by friction. Even when the knife gate 3 is closed due to wear, fluid leaks into the gap of the worn rubber sheet 11, thereby preventing a complete sealing.

이러듯 상기 러버시트(11)가 마모되면 이를 교체 및 수리에 따른 시간 및 비용이 이중으로 소요되는 문제도 있다.As such, when the rubber seat 11 is worn, there is also a problem in that it takes time and cost double according to replacement and repair thereof.

따라서, 본 발명의 목적은 상기와 같이 종래의 나이프게이트 밸브에서 발생되는 문제점을 해소하고자 안출된 것으로 다음과 같은 목적을 갖는다.Accordingly, an object of the present invention is to solve the problems caused by the conventional knife gate valve as described above has the following object.

본 발명의 목적은 나이프게이트가 러버시트에 밀착되어 승하강작동할때 나이 프게이트와 러버시트간의 마찰을 최소화 되도록하여 러버시트가 마모되는 것을 방지함으로서 러버시트의 수명을 최대화하는 동시에 원활히 유로실을 개방, 오픈하여 유체를 원활하게 차단할 수 있는 나이프게이트 밸브를 제공하는데 그 목적이 있다.An object of the present invention is to minimize the friction between the knife gate and the rubber seat when the knife gate is in close contact with the rubber seat to prevent the rubber seat from being worn, thereby maximizing the life of the rubber seat and at the same time smoothly An object of the present invention is to provide a knife gate valve that can open and open to smoothly block a fluid.

상기한 목적을 달성하기 위하여 본 발명은, 나이프게이트가 미끄럽접촉하는 밸브 몸체의 유로실 내측에 러버시트고정홀을 형성하고, 상기 러버시트고정홀에 에어를 주입, 배출함에 따라 수축팽창하는 러버시트를 구성함에 따라 상기한 목적이 달성된다.In order to achieve the above object, the present invention provides a rubber seat fixing hole formed inside the flow chamber of the valve body in which the knife gate is in sliding contact, and the rubber that shrinks and expands as air is injected and discharged into the rubber seat fixing hole. The above object is achieved by constructing the sheet.

이하, 첨부된 도면을 이용하여 더욱 구체적으로 살펴보기로 한다.Hereinafter, with reference to the accompanying drawings will be described in more detail.

첨부 도면 도 2내지 도 4a, 4b에 도시된 바와 같이, 도 2는 본 발명에 따른 나이프게이트 밸브의 구조를 설명하기위한 측단면도이고, 도 3a, 3b는 나이프게이트가 하강하여 닫힐때 러버시트가 팽창되는 것을 설명하기 위한 정면도 및 측단면도이며, 도 4a, 4b는 나이프게이트가 하강되어 완전히 닫힌상태에서 러버시트가 팽창되어 나이프게이트에 밀착된 것을 설명하기 위한 정면도 및 측단면이다.2 to 4a and 4b, Figure 2 is a side cross-sectional view for explaining the structure of the knife gate valve according to the present invention, Figures 3a, 3b is a rubber seat when the knife gate is closed by falling down 4A and 4B are front and side cross-sectional views for explaining that the rubber sheet is expanded and closely adhered to the knife gate while the knife gate is lowered and completely closed.

즉, 본 발명의 나이프게이트 밸브는 몸체(20) 하부에 수평방향으로 유체가 통과하는 유로실(21)이 형성되어 있으며, 이와 수직으로 유체가 지나가는 유로실(21)을 개폐하는 나이프게이트(22)가 입설되어 있다.That is, in the knife gate valve of the present invention, a flow path chamber 21 through which fluid passes in a horizontal direction is formed below the body 20, and a knife gate 22 opening and closing the flow path chamber 21 through which the fluid passes vertically. ) Is put in place.

상기 유로실(21)의 나이프게이트(22)가 지나는 내측벽에는 다수의 돌기(31)가 형성된 러버시트고정홀(36)이 형성되며, 이 러버시트고정홀(36)에는 에어콤프레샤(80)의 압축공기를 주입, 배출함에 따라 수축팽창되는 러버시트(36)가 내장되어 진다.A rubber seat fixing hole 36 having a plurality of protrusions 31 is formed on an inner wall through which the knife gate 22 of the flow path 21 passes, and an air compressor 80 is formed in the rubber seat fixing hole 36. The rubber seat 36 is contracted and expanded as the compressed air is injected and discharged.

상기 러버시트(36)는 러버시트고정홀(36)과 대응되게 양측에 돌기(31)가 구비되고, 상단은 소정의 깊이로 요홈(32)가 구비되고 내측으로 에어홀(33)이 형성되며, 일측상단에는 에어콤프레샤(80)의 압축공기를 주,배출하기 위한 에어 주,배공(34)이 형성된다.The rubber seat 36 is provided with protrusions 31 on both sides thereof to correspond to the rubber seat fixing hole 36, and an upper end is provided with a groove 32 to a predetermined depth, and an air hole 33 is formed inward. On one side, the upper side, the air main, the exhaust hole 34 for supplying the compressed air of the air compressor 80, is formed.

이러한 러버시트(36)은 나이프게이트(22)의 형상과 동일하게 구성하여 나이프게이트(22)의 외주면에 밀착되게 구성하는 것이 바람직하다.The rubber sheet 36 is preferably configured in the same manner as the shape of the knife gate 22 to be in close contact with the outer circumferential surface of the knife gate 22.

그리고 몸체(20)의 상단에는 상부에 에어실린더(60)가 구비된 지지대(29)가 결합되어진다.And the upper end of the body 20 is coupled to the support 29 is provided with an air cylinder 60 at the top.

상기 에어실린더(60)의 피스톤(29) 하부 끝단에는 체결부재(28)에 의해 상기 나이프게이트(22)가 연결되어 에어실린더(60)의 작동에 의해 승하강되게 이루어진다.The knife gate 22 is connected to the lower end of the piston 29 of the air cylinder 60 by the fastening member 28 to move up and down by the operation of the air cylinder 60.

상기한 구성으로 이루어진 나이프게이트 밸브의 작동상태 및 작용을 설명하면 다음과 같다.Referring to the operation state and action of the knife gate valve made of the above configuration are as follows.

먼저, 첨부 도면 도 5에 도시된 바와 같이 본 발명의 나이프게이트 밸브작동을 살펴보면, 에어콤프레샤(80)에서 에어가 공급되면 필터(70)에서 불규칙적으로 공급된 에어를 균일하게 걸러주어 이를 에어실린더(60)와 중간밸브(50)로 공급하게 된다.First, referring to the operation of the knife gate valve of the present invention as shown in FIG. 5, when air is supplied from the air compressor 80, the air is irregularly filtered by the filter 70 and the air cylinder ( 60) and the intermediate valve 50 is supplied.

상기 에어실린더(60)에 공기가 주입되면 에어실린더(60)의 피스톤(27)이 하강작동 하게되고, 중간밸브(50) 스위치가 작동하여 공곱된 에어를 마스터밸브(40) 로 공곱되며, 에어실린더(60)의 작동여부를 마스터밸브(40)로 보내어 마스터밸브(40)를 작동시키게되며, 이때 작동여부에따라 중간밸브(50)에서 마스터밸브(40)로 공급된 에어는 러버시트(30)의 에어 주,배공(34)을 통해 에어홀(32)로 공급되게된다.When air is injected into the air cylinder 60, the piston 27 of the air cylinder 60 is operated to descend, and the intermediate valve 50 switch is operated to multiply the air that has been mixed with the master valve 40. The operation of the cylinder 60 is sent to the master valve 40 to operate the master valve 40. At this time, the air supplied from the intermediate valve 50 to the master valve 40 is supplied to the rubber seat 30. ) Is supplied to the air hole 32 through the air main and vent hole 34.

더욱 구체적으로 설명하면 첨부 도면 도 3a, 3b에서와 같이, 에어실린더(60)의 작동에 의해 피스톤(27)이 하강하면서 결합되어진 나이프게이트(22)가 하강하게됨과 동시에 마스터밸브(40)에서 주입되는 에어가 상기 러버시트(30)의 에어홀(33)로 주입된다.More specifically, as shown in FIGS. 3A and 3B, the knife gate 22 coupled with the piston 27 descends by the operation of the air cylinder 60 is lowered and simultaneously injected from the master valve 40. The air to be injected is injected into the air hole 33 of the rubber seat 30.

이때, 러버시트(30)가 완전히 팽창되기 전이므로 나이프게이트(22)는 러버시트(30)에 최소로 밀착되어 하강하게 되므로 러버시트(30)와의 마찰이 최소화됨으로 러버시트(30)의 마모가 최소화된다.At this time, since the rubber seat 30 is fully inflated, the knife gate 22 is in close contact with the rubber seat 30 to the minimum, so the friction with the rubber seat 30 is minimized, so that the wear of the rubber seat 30 is minimized. Is minimized.

첨부도면 도 4a, 4b에서와 같이 나이프게이트(22)가 하단까지 완전히 하강되어 유로실(21)을 차단하게되면, 에어홀(33)로 주입되는 에어의 압력에 의해 러버시트(32)의 상단 요홈(32)가 나이프게이트(22)의 외주면으로 팽창되어 밀착되어 러버시트(30)와 나이프게이트(22)의 틈새를 완전히 없애어 유체의 흐름을 차단할 수 있게된다.As shown in FIGS. 4A and 4B, when the knife gate 22 is completely lowered to the lower end to block the flow path chamber 21, the upper end of the rubber seat 32 is caused by the pressure of the air injected into the air hole 33. The groove 32 is expanded to the outer circumferential surface of the knife gate 22 to be in close contact with each other to completely eliminate the gap between the rubber seat 30 and the knife gate 22 to block the flow of the fluid.

또한, 유로실(21)이 개방될때는 에어실린더(60)에 주입된 공기가 빠지며, 이와 동시에 에어실린더(60)의 역으로 동작되는 것이 마스터밸브(40)에서 감지되어 러버시트(30)의 에어 주,배공(34)으로 에어홀(33)에 잔류하는 에어를 배출하게된다.In addition, when the passage chamber 21 is opened, the air injected into the air cylinder 60 is released, and at the same time, the master valve 40 detects that the air cylinder 60 is operated in reverse. Air remaining in the air hole 33 to the air main, vent 34 to discharge.

이때, 에어홀(33)에서 공기가 외부로 빠져나가게 되면 팽창되어 나이프게이트(22)를 완전밀착하고 있던 러버시트(30)의 요홈이 수축되고, 이로인해 나이프게이트(22)가 러버시트(30)의 내측면과 마찰없이 위로 상승하게 된다.At this time, when the air escapes from the air hole 33 to the outside, the groove of the rubber seat 30 which is fully in close contact with the knife gate 22 is contracted, thereby causing the knife gate 22 to have a rubber seat 30. It will rise upward without friction with the inner surface of

상기와 같이 나이프게이트(22)의 승하강에 따라 이를 감지하여 러버시트(30)에 에어를 주,배출시켜 러버시트(30)를 수축, 팽창하여 나이프게이트(22)와 밀착 떨어지게 함으로써 나이프게이트(22)의 승하강에 의해 러버시트(30)이 마모되는 것을 최소화 하는 장점과 나이프게이트(22)이 완전히 하강하여 러버시트(30)과 완전밀착되어 최소한의 틈새를 없애어 줌으로 유체의 기밀을 완전하게 유지할 수 있는 장점이 있다.As described above, the knife gate 22 senses this ascending and discharging air to the rubber sheet 30, and the rubber sheet 30 to shrink and expand the rubber sheet 30 to be in close contact with the knife gate 22 by the knife gate ( 22) Advantages of minimizing wear of rubber seat 30 by lifting and lowering and knife gate 22 are completely lowered, so that the rubber sheet 30 is completely in contact with rubber seat 30, eliminating minimal gaps, thereby keeping the fluid tight. There is an advantage to keep it completely.

이상 본 발명에 대해 살펴본 바와 같이, 본 발명의 목적은 나이프게이트와 밀착되어 기밀을 유지하는 러버시트 내부에 에어를 주입,배출시켜 수축팽창케 함으로서 나이프게이트의 반복되는 승하강에 의해 러버시트가 파손되는 것을 방지하여 패킹의 수명을 최대화하는 효과를 가지는 유체의 누수를 완전히 방지하는 효과를 갖는 등의 매우 유용한 발명임이 명백하다.As described above with respect to the present invention, an object of the present invention is that the rubber sheet is damaged by repeated lifting and lowering of the knife gate by inflating and discharging the air inside the rubber sheet which is in close contact with the knife gate to maintain air tightness. It is obvious that the invention is very useful, such as having the effect of completely preventing the leakage of the fluid having the effect of maximizing the life of the packing to prevent.

Claims (3)

몸체(20) 하부에 수평방향으로 유체가 통과하는 유로실(21)이 형성고, 이와 수직으로 유체가 지나가는 유로실(21)을 개폐하는 나이프게이트(22)가 조립되어 있고, 상기 몸체(20) 상단에 지지대(29)가 결합되어 상단부에 에어실린더(60)을 고정하고, 에어실린더(60)의 피스톤(27)의 끝단에 체결부재(28)에 의해 나이프케이트(22)가 고정되어 에어실린더(60)의 작동에 따라 나이프게이트(22)가 승하강하여 유체의 흐름을 개방 또는 폐쇄하는 나이프게이트 밸브에 있어서,A flow path chamber 21 through which fluid passes in a horizontal direction is formed under the body 20, and a knife gate 22 that opens and closes a flow path chamber 21 through which fluid flows vertically is assembled, and the body 20 is assembled. ) The support 29 is coupled to the upper end to fix the air cylinder 60 to the upper end, and the knife cage 22 is fixed to the end of the piston 27 of the air cylinder 60 by the fastening member 28 to air In the knife gate valve to open or close the flow of the fluid by raising and lowering the knife gate 22 in accordance with the operation of the cylinder 60, 상기 나이프게이트(22)가 지나는 유로실(21)의 내측으로 러버시트고정홀(36)을 구성하고, 상기 러버시트고정홀(36)에는 콤프레샤에서 주입되는 에어에 의해 수축팽창되는 러버시트(30)가 내장되는 것을 특징으로 하는 나이프게이트 밸브용 수축팽창식 러버시트.The rubber seat fixing hole 36 is formed inside the flow path chamber 21 through which the knife gate 22 passes, and the rubber seat fixing hole 36 shrinks and expands by air injected from the compressor. Shrinkable rubber seat for knife gate valve, characterized in that the built-in). 제 1항에 있어서,The method of claim 1, 상기 러버시트고정홀(36)에는 양측방으로 다수의 돌기고정부(37)이 구성되는 것을 특징으로 하는 나이프게이트 밸브용 수축팽창식 러버시트.The rubber seat fixing hole 36 is a contraction expansion rubber seat for a knife gate valve, characterized in that a plurality of projection fixing portion 37 is configured in both sides. 제1항 또는 2항에 있어서,The method according to claim 1 or 2, 상기 러버시트(30)는 돌기고정부(37)과 대응되게 다수의 돌기(31)가 양측에 구비되며, 상단은 소정의 깊이로 요홈(32)이 형성되고 내측으로 에어홀(33)을 가지 며 가지며, 일측 상단에 에어배,주입공(34)이 형성된 것을 특징으로 특징으로 하는 나이프게이트 밸브용 수축팽창식 러버시트.The rubber seat 30 is provided with a plurality of projections 31 on both sides to correspond to the projection fixing portion 37, the upper end is formed with a groove 32 to a predetermined depth and has an air hole 33 inwardly And a shrinkage-expandable rubber seat for a knife gate valve, characterized in that the air boat, the injection hole 34 is formed on one side top.
KR1020050022232A 2005-03-17 2005-03-17 Knife gate valve KR100809640B1 (en)

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KR101134995B1 (en) * 2009-10-20 2012-04-09 홍지숙 Seat construction for high pressure and bi-directional bonneted knife gate valve

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GB2507799B (en) * 2012-11-09 2015-01-21 Process Components Ltd Improvements in or relating to gate valves
US11499644B2 (en) 2020-08-25 2022-11-15 Emerson Automation Solutions Final Control US LP Sealing assembly for a knife gate valve
US11300213B1 (en) 2021-02-19 2022-04-12 Emerson Automation Solutions Final Control US LP Floating yoke connection

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KR100264259B1 (en) * 1998-04-01 2000-09-01 이정의 Resilient swat knife gate valve
KR200174910Y1 (en) * 1999-10-06 2000-03-15 성해진 Gate valve
KR200352374Y1 (en) * 2004-03-23 2004-06-05 주식회사 성원공업 a knife gate valve

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KR101134995B1 (en) * 2009-10-20 2012-04-09 홍지숙 Seat construction for high pressure and bi-directional bonneted knife gate valve

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