KR101338234B1 - Dual sealing metal sheet of ball valve - Google Patents

Dual sealing metal sheet of ball valve Download PDF

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Publication number
KR101338234B1
KR101338234B1 KR1020130057082A KR20130057082A KR101338234B1 KR 101338234 B1 KR101338234 B1 KR 101338234B1 KR 1020130057082 A KR1020130057082 A KR 1020130057082A KR 20130057082 A KR20130057082 A KR 20130057082A KR 101338234 B1 KR101338234 B1 KR 101338234B1
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KR
South Korea
Prior art keywords
ball
metal sheet
ring
ball valve
main body
Prior art date
Application number
KR1020130057082A
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Korean (ko)
Inventor
오인식
오성현
최재현
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주식회사 신정기공
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Priority to KR1020130057082A priority Critical patent/KR101338234B1/en
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Publication of KR101338234B1 publication Critical patent/KR101338234B1/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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0689—Packings between housing and plug
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

The present invention relates to a metal sheet of a ball valve used in the water and sewage treatment facility in which a cross-shaped ball is applied, specifically, to a metal sheet of a ball valve with a dual sealing constitution, and, more specifically, to a dual sealing metal sheet of a ball valve capable of completely blocking leakage possibly occurring along a slope due to the inner pressure of the valve in the closed state by constituting the inner slope of the metal sheet contacting a close disk with a dual sealing. The present invention provides a dual sealing metal sheet of a ball valve, in which the ball valve comprises a cross-shaped ball (A1), a main body (A2) capable of mounting the ball, both side covers (A4) including a sheet capable of sealing the ball of the main body, a rotary shaft (A5) capable of rotating the ball from the main body, and a supporter (A6) on the opposite side, and further includes a metal sheet (A3) capable of elastically applying a pressure to an inner slope (A30) contacting with a close disk (A11) of a ball (A1) toward the close disk by adding a spring (A41) to the covers (A4) and fixing a fixing ring (A42) on the front end, wherein the inner slope (A30) of the metal sheet (A3) has a ring groove (1) formed in the middle, and a leakage prevention ring (2) inserted into the ring groove.

Description

볼 밸브의 이중 실링 메탈시트{Dual Sealing Metal Sheet of Ball Valve} Dual Sealing Metal Sheet of Ball Valves

본 발명은 상하수도에 사용되는 십자형 볼이 적용된 볼 밸브의 메탈시트에 관한 것으로, 더 상세하게는 상기의 메탈시트를 이중 실링으로 구성하여 누수를 완벽하게 차단할 수 있게 한 볼 밸브의 이중 실링 메탈시트를 제공한다.
The present invention relates to a metal seat of a ball valve to which a cross ball is used for water supply and sewage, and more particularly, to a double sealing metal seat of a ball valve that can completely block leakage by configuring the metal seat as a double sealing. to provide.

일반적인 볼 밸브는 구체형 볼로 이루어지나, 배관의 직경이 상당할 경우 그에 대응하는 구체형 볼의 제작이 어려워 배관을 십자형으로 용접한 볼을 사용하고 있다.A general ball valve is composed of a spherical ball, but when the diameter of the pipe is considerable, it is difficult to produce a spherical ball corresponding to the pipe.

이처럼, 십자형 볼이 적용되는 볼 밸브는, 출원번호 10-2007-0062424호(이하 '종래'로 함)에 제시된 도1과 같이, 십자형 볼(A1)과, 상기 볼을 장착할 수 있는 본체(A2)와, 상기 본체의 볼을 실링 할 수 있는 시트를 포함하는 양측 커버(A4), 상기 본체로부터 볼을 회전시킬 수 있는 회전축(A5), 반대 측에는 지지부(A6)가 기본적으로 구성된다.As such, the ball valve to which the cross ball is applied has a cross ball A1 and a main body to which the ball can be mounted, as shown in FIG. 1 shown in Application No. 10-2007-0062424 (hereinafter, referred to as 'conventional') A2), both cover A4 including a sheet capable of sealing the ball of the main body, a rotating shaft A5 capable of rotating the ball from the main body, and a supporting part A6 are basically provided on the opposite side.

여기에서, 볼 밸브는 볼이 크고 무게가 상당하며 구체형이 아니므로 밸브의 내부 중앙에 정확하게 센터링시키기가 어렵다. 이에 볼의 회전작동시 시트와의 걸림부가 발생하여 시트의 마모가 심하게 발생한다.Here, the ball valve is difficult to be centered accurately in the inner center of the valve because the ball is large, weighty and not spherical. Accordingly, the engaging portion with the seat occurs during the rotation operation of the ball causes severe wear of the seat.

하여, 종래는 도2와 같이 상기 시트의 마모를 방지하기 위해 고무나 합성수지가 아닌 메탈으로 되는 메탈시트(A3)로 구성하고, 상기 시트는 스프링(A41)을 이용하여 커버(A4)로부터 탄성 가능토록 구성하는 것이 대부분이다.Thus, in order to prevent the wear of the sheet, as shown in FIG. 2, the metal sheet A3 is made of metal, not rubber or synthetic resin. Most of the construction.

그러나, 종래는 볼(A1)의 폐쇄디스크(A11)와 접촉되는 메탈시트(A3)의 내관 경사면(A30)이 일직선상으로 되어 있기 때문에 폐쇄시 내부 수압에 의해 상기 경사면(A30)의 좁은 틈새를 타고 상당한 누수가 발생되는 문제점이 있었다.
However, conventionally, since the inner tube inclined surface A30 of the metal sheet A3 in contact with the closed disk A11 of the ball A1 is in a straight line, the narrow gap of the inclined surface A30 is closed due to internal water pressure during closing. There was a problem that a significant leak in the ride.

출원번호 10-2007-0062424호의 "메탈시트를 갖는 볼 밸브""Ball Valves with Metal Seat" of Application No. 10-2007-0062424

본 발명은 종래를 감안하여 개발된 것으로 써, 특히 폐쇄디스크와 접촉되는 메탈시트의 내관 경사면을 이중 실링으로 구성함으로써, 상기의 경사면으로 발생되는 누수를 완벽히 차단할 수 있도록 함에 그 목적이 있다.
The present invention has been developed in view of the related art, and an object thereof is to make it possible to completely block leakage caused by the inclined surface by configuring the inner tube inclined surface of the metal sheet in contact with the closed disk with double sealing.

상기 목적을 달성하기 위해 본 발명의 주요구성은, 메탈시트의 내관 경사면 중간에 링홈을 형성하고, 상기 링홈에 끼움 삽입되는 누수방지링을 구성한 것을 특징으로 한다.
In order to achieve the above object, the main configuration of the present invention is characterized in that a ring groove is formed in the middle of the inner tube inclined surface of the metal sheet, and a leakage preventing ring is inserted into the ring groove.

상기와 같이 된 본 발명은, 링홈과 누수방지링에 의해 경사면의 중간에 이중 틈새를 형성함으로써, 종래와 같이 일직선상으로 되는 경사면의 누수 경로 중간을 끊어 줄 수 있기 때문에 누수를 완벽히 차단할 수 있는 효과가 있다.
The present invention as described above, by forming a double gap in the middle of the inclined surface by the ring groove and the leakage preventing ring, it is possible to cut the middle of the leakage path of the inclined surface in a straight line as in the prior art so that the effect can be completely blocked There is.

도 1은 종래의 전체 예시도
도 2는 종래의 요부 확대도
도 3은 본 발명의 전체 예시도
도 4는 본 발명의 요부 확대도
도 5는 도 4의 분해 단면도
도 6은 본 발명의 누수방지링에 씰을 부가한 예시도
도 7은 본 발명에 시트조정장치를 부가한 예시도 FIG. 1 is a schematic diagram of a conventional full-
2 is an enlarged view of a conventional main part
Figure 3 is an overall illustration of the present invention
4 is an enlarged view of main parts of the present invention;
5 is an exploded sectional view of Fig. 4
6 is an exemplary view of adding a seal to the leakage preventing ring of the present invention
7 is an exemplary view in which the seat adjusting device is added to the present invention.

이하 본 발명을 구현하기 위한 바람직한 예를 첨부된 도면에 의거하여 더욱 상세하게 설명하면 다음과 같다. 다만 본 발명을 설명함에 있어 선등록된 공지기술 및 통상적 기술에 대한 구체적 설명은 본 발명의 요지를 흐릴 수 있어 생략 또는 간단한 명칭 등으로 대체한다.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the present invention, the detailed description of the known technology and the conventional technology registered in advance may obscure the gist of the present invention and replace it with an omission or a simple name.

도1, 도2와 같이, 본 발명은 십자형 볼(A1)과, 상기 볼을 장착할 수 있는 본체(A2)와, 상기 본체의 볼을 실링 할 수 있는 시트를 포함하는 양측 커버(A4), 상기 본체로부터 볼을 회전시킬 수 있는 회전축(A5), 반대 측에는 지지부(A6)로 이루어지는 볼 밸브 중, 상기 커버(A4)에 스프링(A41)을 부가하고 선단에 고정링(A42)을 고정하여 볼(A1)의 폐쇄디스크(A11)와 접촉되는 내관 경사면(A30)을 폐쇄디스크 측으로 탄성 가압할 수 있도록 구성되는 메탈시트(A3)를 포함하는 볼 밸브를 전제로 한다.
As shown in Fig. 1 and Fig. 2, the present invention provides a cross-shaped ball A1, a main body A2 to which the ball can be mounted, and a side cover A4 including a seat to seal the ball of the main body, Of the ball valves made of a rotating shaft A5 capable of rotating the ball from the main body, and a support part A6 on the opposite side, a spring A41 is added to the cover A4 and the fixing ring A42 is fixed to the tip. It is assumed that a ball valve including a metal seat A3 configured to elastically press the inner tube inclined surface A30 in contact with the closed disk A11 of (A1) to the closed disk side.

도4와 같이, 본 발명은 상기의 전제구성 중, 메탈시트(A3)의 내관 경사면(A30) 중간에 링홈(1)을 형성하고, 상기 링홈에 끼움 삽입되는 누수방지링(2)이 구성됨을 특징으로 한다.As shown in FIG. 4, the present invention forms a ring groove 1 in the middle of the inner tube inclined surface A30 of the metal sheet A3 and includes a leakage preventing ring 2 inserted into the ring groove. It features.

즉, 본 발명은 링홈(1)과 누수방지링(2)에 의해 경사면(A30)의 중간에 이중 틈새가 형성되기 때문에 종래와 같이 경사면이 일직선상으로 되는 것에 비해 누수 경로 중간을 끊어 줄 수 있어 누수를 완벽히 차단할 수 있는 효과가 있다.
That is, the present invention is because the double groove is formed in the middle of the inclined surface (A30) by the ring groove (1) and the leakage preventing ring (2) can be cut off the middle of the leakage path as compared to the inclined surface in a straight line as in the prior art There is an effect that can completely block the leak.

도5와 같이, 본 발명에서 메탈시트(A3)는, 원통 관 형태로 되며, 정면에서 봤을 때 상측의 단면형태는, 폐쇄디스크(A11)와 마주보는 측에 형성된 확장턱(1A), 그 반대측에 길쭉하게 연장형성되는 축부(1B), 확장턱과 축부로 이어지는 내부 중심에 형성되는 내관(1C), 확장턱의 후측단에 스프링(A41)의 일단이 삽입가능한 안착홈(1D), 축부의 외관에 다수 구비되는 씰(1E), 확장턱의 내관 선단에 폐쇄디스크와 접촉되도록 형성되는 경사면(A30), 경사면 중간에 형성되는 링홈(1)으로 구성되며, 상기의 링홈(1)에 누수방지링(2)을 끼움 삽입함이 바람직하다. 이때, 커버(A4)는 도4와 같이 상기 메탈시트(A3)의 외관과 대응되는 형태로 장착홈(A40)을 구성한다. 상기의 커버(A4) 및 볼 밸브의 전체적 구성 그리고 메탈시트(A3)와의 결합구성을 바람직하게 도시한 것이 도3, 도4와 같다.
As shown in Fig. 5, the metal sheet A3 in the present invention has a cylindrical tube shape, and when viewed from the front, the cross section of the upper side is an extended jaw 1A formed on the side facing the closed disk A11, and the opposite side thereof. Shaft portion (1B) is formed extending in the elongated, inner tube (1C) formed in the inner center leading to the expansion jaw and the shaft, the seating groove (1D) that one end of the spring (A41) can be inserted into the rear end of the expansion jaw, the shaft portion It is composed of a plurality of seals (1E) provided on the exterior, the inclined surface (A30) formed in contact with the closing disk at the inner tube tip of the expansion jaw, the ring groove (1) formed in the middle of the inclined surface, preventing leakage to the ring groove (1) It is preferable to insert the ring 2. In this case, the cover A4 forms the mounting groove A40 in a form corresponding to the appearance of the metal sheet A3 as shown in FIG. 4. 3 and 4 show the overall configuration of the cover A4 and the ball valve and the coupling configuration with the metal seat A3.

한편, 본 발명에서 상기의 누수방지링(2)은 메탈시트(A3)와 동일소재로 구성함이 마모방지를 위해 가장 바람직하나, 누수방지능력을 더욱 향상시키기 위해 메탈시트(A3)와 이질소재를 적용할 수도 있다. 이때 이질소재는 동일한 메탈계열이긴 하나 연한 성질을 띠는 연질메탈 또는 합성수지, 고무 중 어느 하나로 함이 이상적이다.
On the other hand, in the present invention, the leakage preventing ring (2) is composed of the same material as the metal sheet (A3) is most preferable for the wear protection, the metal sheet (A3) and heterogeneous material to further improve the leakage prevention ability You can also apply At this time, the heterogeneous material is ideally made of any one of the same metal-based, but soft metal having a soft property, synthetic resin, rubber.

도6과 같이, 또 다른 실시 예로 본 발명에서, 누수방지링(2)의 내관 및 외관에 씰(21)을 부가함이 더욱 바람직하다, 이때 누수방지링(2)은 메탈로 구성하고, 씰(21)은 합성수지 또는 고무 중 어느 하나로 함이 이상적이다.
As shown in Figure 6, in another embodiment of the present invention, it is more preferable to add the seal 21 to the inner tube and the outer tube of the leakage preventing ring 2, wherein the leakage preventing ring 2 is made of a metal, the seal (21) is ideally made of either synthetic resin or rubber.

도7과 같이, 또 다른 실시 예로 본 발명에서, 상기 메탈시트(A3)의 선단에 고정링(A42)을 해체하고, 메탈시트(A3)의 내측 외관 선단에 걸림홈(3)을 형성하며, 상기 걸림홈에 걸려지는 내관돌기(41)를 가진 조정관(4)을 구비하고, 상기 조정관을 커버(A4)의 장착홈(A40) 선단에 다수의 볼트(5)로 체결구성한 시트조정장치를 부가함이 더욱 바람직하다.As shown in FIG. 7, in another embodiment of the present invention, the fixing ring A42 is dismantled at the front end of the metal sheet A3, and the locking groove 3 is formed at the inner front end of the metal sheet A3. It is provided with an adjustment tube (4) having an inner tube projection (41) to be caught in the locking groove, and the seat adjustment device is configured by fastening the adjustment tube with a plurality of bolts (5) at the tip of the mounting groove (A40) of the cover (A4) More preferably.

즉, 종래는 도2와 같이, 커버(A4)의 선단에 고정링(A42)을 구성하여 메탈시트(A3)를 고정하고 있는데, 이는 스프링(A41)에 의해 커버(A4)로부터 유동되는 메탈시트(A3)의 탄성간격과 폐쇄디스크(A11)를 압박하는 메탈시트(A3)의 탄성가압력을 조정할 수 없었고, 이에 폐쇄디스크(A11)와 메탈시트(A3) 간의 접촉에 대한 긴밀성이 떨어져 누수의 발생량이 증가하는 문제점이 있었다.That is, in the related art, as shown in FIG. 2, the fixing sheet A42 is fixed to the tip of the cover A4 to fix the metal sheet A3, which is flowed from the cover A4 by the spring A41. The elastic spacing of (A3) and the elastic pressing force of the metal sheet (A3) that presses the closed disk (A11) could not be adjusted. There was an increasing problem.

그러나, 상기와 같은 시트조정장치를 부가하면, 폐쇄디스크(A11)를 가압하는 메탈시트(A3)의 탄성간격과 탄성가압력을 조정관(4)으로 조정가능케 됨은 물론, 긴밀성이 더욱 향상시켜 누수의 증가량을 월등히 줄일 수 있는 효과가 있다.
However, the addition of the seat adjustment device as described above, the elastic gap and the elastic pressing force of the metal sheet (A3) for pressing the closing disk (A11) can be adjusted by the adjustment pipe (4), as well as the tightness is further improved to increase the amount of leakage There is an effect that can be greatly reduced.

이상과 같이 본 발명을 설명하였으나, 본 발명의 구현을 설명하기 위해 제시한 도면은 예시도로 써 특징을 부각시키고자 도법에는 맞지 않을 수 있고, 요지를 흐릴 수 있는 부분은 편의상 삭제하였다. 이를 기반으로 본 발명과 관련된 해당기술분야의 당업자라면 다양하게 수정 및 변경 가능할 것이다.
Although the present invention has been described as described above, the drawings presented to explain the implementation of the present invention may not be suitable for the projection to highlight the features by way of illustration, and portions that may obscure the gist of the present invention are deleted for convenience. Based on this, those skilled in the art related to the present invention may be variously modified and changed.

볼(A1) 폐쇄디스크(A11)
본체(A2) 메탈시트(A3)
경사면(A30) 커버(A4)
장착홈(A40) 스프링(A41)
고정링(A42) 회전축(A5)
지지부(A6) 링홈(1)
확장턱(1A) 축부(1B)
내관(1C) 안착홈(1D)
씰(1E) 누수방지링(2)
씰(21) 걸림홈(3)
조정관(4) 내관돌기(41)Ball (A1) Closed Disc (A11)
Body (A2) Metal Sheet (A3)
Inclined surface (A30) Cover (A4)
Mounting groove (A40) Spring (A41)
Retaining ring (A42) Rotary shaft (A5)
Support (A6) Ring Groove (1)
Extension Jaw (1A) Shaft (1B)
Inner pipe (1C) Seating groove (1D)
Seal (1E) Leakage prevention ring (2)
Seal (21) Locking groove (3)
Control tube (4) Inner tube protrusion (41)

Claims (5)

십자형 볼(A1)과, 상기 볼을 장착할 수 있는 본체(A2)와, 상기 본체의 볼을 실링 할 수 있는 시트를 포함하는 양측 커버(A4), 상기 본체로부터 볼을 회전시킬 수 있는 회전축(A5), 반대 측에는 지지부(A6)로 이루어지는 볼 밸브 중, 상기 커버(A4)에 스프링(A41)을 부가하고 선단에 고정링(A42)을 고정하여 볼(A1)의 폐쇄디스크(A11)와 접촉되는 내관 경사면(A30)을 폐쇄디스크 측으로 탄성 가압할 수 있도록 구성되는 메탈시트(A3)를 포함하는 볼 밸브에 있어서,
상기 메탈시트(A3)의 내관 경사면(A30) 중간에 링홈(1)을 형성하고, 상기 링홈에 끼움 삽입되는 누수방지링(2)이 구성됨과,
상기 누수방지링(2)의 내관 및 외관에 씰(21)이 구성됨과,
상기 메탈시트(A3)의 선단에 고정링(A42)을 해체하고, 메탈시트(A3)의 내측 외관 선단에 걸림홈(3)을 형성하며, 상기 걸림홈에 걸려지는 내관돌기(41)를 가진 조정관(4)을 구비하고, 상기 조정관을 커버(A4)의 장착홈(A40) 선단에 다수의 볼트(5)로 체결한 시트조정장치를 구성됨을 특징으로 하는 볼 밸브의 이중 실링 메탈시트.Both sides cover A4 including a cross ball A1, a main body A2 on which the ball can be mounted, a seat capable of sealing the ball of the main body, and a rotating shaft capable of rotating the ball from the main body ( A5), among the ball valves composed of the supporting portion A6 on the opposite side, a spring A41 is added to the cover A4 and the fixing ring A42 is fixed to the tip to contact the closed disk A11 of the ball A1. In the ball valve comprising a metal seat (A3) configured to elastically press the inner pipe inclined surface (A30) to the closed disk side,
Forming a ring groove (1) in the middle of the inner tube inclined surface (A30) of the metal sheet (A3), and the leakage preventing ring (2) is inserted into the ring groove is configured,
Seal 21 is configured in the inner tube and the outer tube of the leak-proof ring (2),
The fixing ring A42 is dismantled at the tip of the metal sheet A3, and the locking groove 3 is formed at the inner exterior tip of the metal sheet A3, and the inner tube protrusion 41 is caught by the locking groove. A double sealing metal seat of a ball valve having an adjustment pipe (4), comprising a seat adjustment device for fastening the adjustment pipe with a plurality of bolts (5) at the tip of the mounting groove (A40) of the cover (A4). 삭제delete 삭제delete 삭제delete 삭제delete
KR1020130057082A 2013-05-21 2013-05-21 Dual sealing metal sheet of ball valve KR101338234B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59118856U (en) * 1983-01-31 1984-08-10 株式会社北沢バルブ Emergency sealing device for ball valves
KR20100022379A (en) * 2008-08-19 2010-03-02 한국기계연구원 High pressure ball valve within the double seat ring and relief valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59118856U (en) * 1983-01-31 1984-08-10 株式会社北沢バルブ Emergency sealing device for ball valves
KR20100022379A (en) * 2008-08-19 2010-03-02 한국기계연구원 High pressure ball valve within the double seat ring and relief valve

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