KR200303547Y1 - Valve disk to prevent cavitation - Google Patents

Valve disk to prevent cavitation Download PDF

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Publication number
KR200303547Y1
KR200303547Y1 KR20-2002-0029033U KR20020029033U KR200303547Y1 KR 200303547 Y1 KR200303547 Y1 KR 200303547Y1 KR 20020029033 U KR20020029033 U KR 20020029033U KR 200303547 Y1 KR200303547 Y1 KR 200303547Y1
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South Korea
Prior art keywords
valve
valve disc
fluid
disk
valve disk
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KR20-2002-0029033U
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Korean (ko)
Inventor
김재호
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신진정공 주식회사
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Priority to KR20-2002-0029033U priority Critical patent/KR200303547Y1/en
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Publication of KR200303547Y1 publication Critical patent/KR200303547Y1/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
    • F16K1/16—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 with pivoted closure-members
    • F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member

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

Abstract

본 고안은 버터플라이밸브(Butterfly Valve)의 밸브디스크 구조를 개량하여 유체(물)흐름과 디스크의 주변에 발생하는 와류를 분산시켜 캐비테이션(Cavitation) 현상을 방지할 수 있게 하여 밸브의 진동이나 소음방지는 물론 내구성을 향상시킬 수 있도록 하기 위하여 밸브디스크(10)의 전면 하반부에 양측으로 하향 경사진 유도로(20)(20')를 다단으로 구성하고 그 상반부의 상단에는 유도홈(30)(30')을 다수개로 형성하며, 이 부분과 같은 방향의 밸브디스크(10) 후면부분에는 돌기부(40)(40')에 의한 다수의 분산 안내로(50)(50')를 형성한 것이다.The present invention improves the valve disk structure of the butterfly valve to disperse the vortices generated around the fluid flow and the disk to prevent cavitation, thereby preventing vibration and noise of the valve. Of course, in order to improve the durability, the induction paths 20 and 20 'inclined downward to both sides in the lower half of the valve disc 10 are configured in multiple stages, and the induction grooves 30 and 30 are formed at the upper end of the upper half. ') Is formed in a plurality, and a plurality of dispersion guide paths 50, 50' are formed on the rear surface portion of the valve disc 10 in the same direction as this portion by the projections 40, 40 '.

Description

캐비테이션 방지구조가 형성된 밸브디스크{Valve disk to prevent cavitation}Valve disk with cavitation prevention structure {Valve disk to prevent cavitation}

본 고안은 버터플라이밸브(Butterfly Valve)의 밸브디스크 구조를 개량하여 유체(물)흐름을 분산시킴은 물론 디스크의 주변에 발생하는 와류를 분산 및 확산시켜 캐비테이션(Cavitation) 현상을 방지할 수 있게 하여 밸브의 진동이나 소음방지는 물론 내구성을 향상시킬 수 있도록 한 캐비테이션 방지구조가 형성된 밸브디스크에 관한 것이다.The present invention improves the valve disk structure of the butterfly valve to disperse the fluid flow and to prevent cavitation by dispersing and diffusing vortices generated around the disk. The present invention relates to a valve disc in which a cavitation prevention structure is formed to improve vibration and noise, as well as durability.

좀더 구체적으로는, 배관라인의 적정위치에 설치된 버터플라이밸브에서 유체의 통과량을 조절하기 위하여는 밸브몸체 내의 밸브디스크 회동에 의한 개도(開度)로 조절하게 됨은 주지된 바와 같다.More specifically, in order to control the flow rate of the fluid in the butterfly valve installed in the proper position of the pipe line is to be adjusted to the opening degree by the valve disk rotation in the valve body as is well known.

이때 밸브디스크가 닫힌 상태에서 열리기 시작할 경우에나 또는 비교적 적은 각도로 개방되어 유체의 흐름을 조절할 경우에는 밸브디스크 부분에서 유속이 급속히 증가함으로 디스크 후면의 압력이 저하되고 이 때 유체(물)내의 공기가 기포로 변하게 되는 캐비테이션 현상이 발생하며, 또한 이로 인하여 밸브디스크의 양측 지지부에 무리한 힘이 항시 인가되어 내구성이 현저히 저하됨은 물론 고장발생의 주 요인이 되었으며 관로의 소음과 진동발생의 근원이 되어왔다.At this time, when the valve disc starts to open in the closed state or when the flow is controlled at a relatively small angle to control the flow of the fluid, the flow velocity rapidly increases in the valve disc portion, so that the pressure on the back of the disc decreases, and the air in the fluid (water) Cavitation phenomenon that turns into bubbles occurs, and because of this, excessive force is always applied to both support parts of the valve disc, which significantly degrades durability and is a major cause of failure, and has been a source of noise and vibration in the pipeline.

따라서 밸브의 디스크가 비교적 적은 각도에서 유체의 흐름을 조절하기 위하여 저개도(底開度)로 변화될 시 디스크면과 면접되는 유체의 유속 흐름을 분산 유도하여 유속을 저하시킴과 상기한 캐비테이션 현상이 생성되지 않도록 하는 기술적 개발이 요구되고 있는 현실이다.Therefore, when the disk of the valve is changed to a low opening degree in order to control the flow of the fluid at a relatively small angle, the flow rate of the fluid interviewed with the disk surface is induced to disperse and lower the flow rate. There is a demand for technical development that prevents it from being created.

이러한 현실을 감안하여 선 등록실용신안 제0256366호와 제0257281호가 제안된 바 있었으나 상기한 선 등록고안은 밸브디스크에 유로유도판, 압력감쇠판, 다공유도판, 다수의 리브,... 등 비교적 복잡한 구조의 기능을 별도로 구비하여 밸브디스크에 일체로 형성시켜야 하는 구조의 복잡성을 내재하고 있었으며 또한 이러한 구성을 밸브디스크에 일체화시키는 제조공정 역시 복잡하여 실제의 양산에는 많은문제점을 가지고 있었다.In consideration of this reality, the first registration utility model Nos.0256366 and No.0257281 have been proposed, but the above-mentioned registration proposals are relatively effective in the valve disc, such as flow guide plate, pressure damping plate, multi-sharing plate, multiple ribs, etc. In addition to the complex structure of the structure has the complexity of the structure to be integrally formed on the valve disk, and the manufacturing process of integrating such a configuration into the valve disk was also complicated to have a lot of problems in the actual mass production.

본 고안은 이러한 종래의 문제점을 해소하기 위하여 안출한 것으로 본 고안은 밸브디스크의 전면 하반부 양측에 유체 분산 안내로를 다단으로 형성하고 그 상단부에도 분산 유도로를 형성하여 디스크 부위를 지나는 유체(물)의 유속을 현저히 저하시킴은 물론 유체가 밸브몸체의 내부를 매우 안정적으로 흐를 수 있게 하여 밸브의 캐비테이션 현상을 방지할 수 있게 한 것으로, 이하 본 고안의 바람직한 실시 예를 첨부도면에 연관시켜 보다 상세히 설명하면 다음과 같다.The present invention has been devised to solve such a conventional problem. The present invention has a multi-stage fluid dispersion guide path formed on both sides of the lower half of the front of the valve disc, and a dispersion induction path is formed at the upper end thereof to pass the fluid (water). In addition to significantly lowering the flow rate of the fluid as well as allowing the fluid to flow very stably inside the valve body to prevent the cavitation phenomenon of the valve, will be described in detail with reference to the accompanying drawings, preferred embodiments of the present invention Is as follows.

도 1은 본 고안의 사시도.1 is a perspective view of the present invention.

도 2는 본 고안의 정면도.2 is a front view of the present invention.

도 3은 본 고안의 배면 사시도.3 is a rear perspective view of the present invention.

도 4는 본 고안이 밸브몸체내에서 개도가 조절된 예를 보인 측면도.Figure 4 is a side view showing an example in which the present invention is adjusted the opening degree in the valve body.

도 5는 본 고안이 밸브몸체 내에 결합된 상태를 보인 정면도.Figure 5 is a front view showing a state in which the subject innovation is coupled within the valve body.

* 도면의 주요부분에 대한 부호설명* Explanation of symbols on the main parts of the drawings

10 : 밸브디스크 20 20' : 유도로 30 30': 유도홈10: valve disc 20 20 ': induction furnace 30 30': induction groove

40 40': 돌기부 50 50': 분산안내로40 40 ': protrusion 50 50': dispersion guide

도 1은 본 고안의 사시도를 도시한 것이고, 도 2는 정면도, 도 3은 배면 사시도를 도시한 것으로 이에 도시한 바와 같이,1 illustrates a perspective view of the present invention, FIG. 2 illustrates a front view, and FIG. 3 illustrates a rear perspective view.

본 고안은 밸브디스크(10)의 전면 하반부에 캐비테이션 방지수단 즉, 중심을 기점으로 하여 양측으로 하향 경사진 유도로(20)(20')를 다단으로 구성하여 일체로 형성하였다.The present invention was formed integrally by constructing a multi-stage guideway (20, 20 ') inclined downward to both sides from the cavitation prevention means, that is, the center from the front lower half of the valve disc (10).

그리고 밸브디스크(10) 상반부의 상단에는 단면이 "V"형 인 유도홈(30)(30')을 다수개로 형성하고, 이 부분과 연결되는 밸브디스크(10)의 후면부분에는 돌기부(40)(40')에 의한 다수의 분산 안내홈(50)(50')을 형성하였다.In addition, a plurality of guide grooves 30 and 30 ′ having a cross section of “V” type is formed at an upper end of the upper portion of the valve disc 10, and a protrusion 40 is formed at a rear portion of the valve disc 10 connected to this portion. A plurality of distributed guide grooves 50, 50 'by 40' were formed.

여기에서 분산안내로(50)(50') 역시 단면이 "V"형으로 구성되었다.Here, the dispersion guides 50 and 50 'also have a cross-section "V" type.

도면 중 미설명부호 60은 연결플랜지, 70은 밸브몸체, 80은 구동축을 도시한 것이다.In the drawings, reference numeral 60 is a connection flange, 70 is a valve body, and 80 is a drive shaft.

이와 같이 구성된 본 고안의 작용을 설명한다.The operation of the present invention configured as described above will be described.

본 고안은 통상의 방법과 같이 구동축(80)을 회전시켜 밸브몸체(70) 내에 구성된 밸브디스크(10)가 경사진 기울기의 정도에 따라 개도를 임의 조절하게 됨은 공지된 바와 같다.The present invention is as known in the art, by rotating the drive shaft 80, the valve disk 10 configured in the valve body 70 to arbitrarily adjust the opening degree according to the degree of inclination.

즉, 유체(물)의 통과량을 조절하기 위하여 밸브디스크(10)가 일정한 경사각의 기울기로 도 4에 도시한 바와 같이 경사지게 고정된 경우에 이에 통과되는 유체는 밸브디스크(10)면에 도달하면서 심한 저항력과 와류현상이 발생되며 그 힘은 매우 강력하다.That is, when the valve disc 10 is fixed to the inclined angle as shown in FIG. 4 to adjust the amount of passage of the fluid (water) as shown in FIG. 4, the fluid passing therethrough reaches the valve disc 10 surface. Severe resistance and vortex occur, and the force is very strong.

이때 밸브디스크(10)면에 도달한 유체는 하반부로는 양측의 유도로(20)(20')를 따라 양 방향에서 다단으로 분산 유도작용이 되며, 밸브디스크(10)의 상반부에 인가된 유체는 그 상단부에 형성된 유도홈(30)(30')을 따라 분산 안내된 후 그 후면부에 구성된 분산 안내로(50)(50')를 따라 유체의 흐름이 각 방향으로 분산유도 작용이 된다.At this time, the fluid reaching the surface of the valve disc 10 is distributed induction in both stages in both directions along the induction paths 20, 20 'on both sides, and the fluid applied to the upper half of the valve disc 10. After the guide is distributed along the guide grooves 30 and 30 'formed at the upper end thereof, the flow of the fluid is distributed in each direction along the dispersion guide paths 50 and 50' configured at the rear part thereof.

본 고안은 밸브디스크(10)에 형성한 정류구조가 유체의 흐름을 각 방향으로 분산 및 확산시켜 주기 때문에 밸브디스크 주변에 발생하는 와류현상이 고르게 분산되어 이 때문에 생성되는 캐비테이션의 발생이 억제되는 것이다.According to the present invention, since the rectifying structure formed on the valve disc 10 distributes and diffuses the flow of fluid in each direction, the vortices occurring around the valve disc are evenly distributed, thereby suppressing the generation of cavitation. .

이상과 같이 본 고안은 밸브디스크의 상단부에는 유체를 각 방향으로 분산시켜 주는 유도홈이 형성되고 이와 연결되는 후면부에는 분산안내홈을 형성하였고, 또한 하반부에는 양 방향으로 다단의 유도로를 구성하였기 때문에 버터플라이밸브의 개도 조절에 따라 경사진 위치에서 고정된 밸브디스크에 도달한 유체는 상, 하의 각기 방향으로 유도 분산 및 확산작용이 되는 것이어서, 저항력에 의한 수압발생이 현저하게 감소되어 캐비테이션 현상에 따른 진동과 소음의 발생이 방지됨은 물론 밸브디스크에 무리한 힘이 인가됨을 방지할 수 있어 그 사용년한이 증대되고 밸브의 내구성이 향상되며 유체제어의 특성이 매우 우수한 작용효과를 갖게 되는 것이다.As described above, the present invention has an induction groove for dispersing fluid in each direction at the upper end of the valve disc, and a dispersion guide groove is formed at the rear part connected thereto, and also has a multi-step induction path in both directions at the lower half. The fluid reaching the fixed valve disc in the inclined position according to the adjustment of the opening degree of the butterfly valve is induced dispersion and diffusion in the up and down directions, so that the hydraulic pressure generated by the resistive force is significantly reduced, resulting in the cavitation phenomenon. It is possible to prevent the occurrence of vibration and noise as well as to prevent excessive force applied to the valve disk, so that its service life is increased, the durability of the valve is improved, and the characteristics of fluid control have a very good effect.

Claims (2)

밸브디스크(10)의 전면 하반부에 양측으로 하향 경사진 유도로(20)(20')를 다단으로 구성하고 그 상반부의 상단에는 유도홈(30)(30')을 다수개로 형성하며, 이 부분과 같은 방향의 밸브디스크(10) 후면부분에는 돌기부(40)(40')에 의한 다수의 분산 안내로(50)(50')를 형성하여 된 캐비테이션 방지구조가 형성된 밸브디스크.Induction paths (20, 20 ') inclined downward to both sides in the front lower half of the valve disc 10 in a multi-stage, and formed in the upper half of the plurality of guide grooves (30, 30'), this part A valve disk having a cavitation prevention structure formed by forming a plurality of distribution guide paths 50, 50 ′ by the projections 40, 40 ′ on the rear portion of the valve disk 10 in the same direction. 제 1항에 있어서,The method of claim 1, 유도홈(30)(30')과 분산안내로(50)(50')를 단면이 "V" 형으로 형성한 캐비테이션 방지구조가 형성된 밸브디스크.A valve disc having a cavitation prevention structure in which the guide grooves 30, 30 'and the dispersion guideways 50, 50' are formed in a cross-section "V".
KR20-2002-0029033U 2002-09-27 2002-09-27 Valve disk to prevent cavitation KR200303547Y1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100700932B1 (en) 2006-12-15 2007-03-28 (주)대한계기정밀 Water gauge for anti?freezing prevention and flowing backward prevention
KR101364676B1 (en) * 2012-05-03 2014-02-20 동아대학교 산학협력단 Anti-cavitation Butterfly Balve
KR20190065891A (en) * 2017-12-04 2019-06-12 동아대학교 산학협력단 Butterfly Valve with Disc for Cavitation Reduction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100700932B1 (en) 2006-12-15 2007-03-28 (주)대한계기정밀 Water gauge for anti?freezing prevention and flowing backward prevention
KR101364676B1 (en) * 2012-05-03 2014-02-20 동아대학교 산학협력단 Anti-cavitation Butterfly Balve
KR20190065891A (en) * 2017-12-04 2019-06-12 동아대학교 산학협력단 Butterfly Valve with Disc for Cavitation Reduction
KR102033578B1 (en) * 2017-12-04 2019-10-17 동아대학교 산학협력단 Butterfly Valve with Disc for Cavitation Reduction

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