KR200392374Y1 - Check valve with current detector - Google Patents

Check valve with current detector Download PDF

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Publication number
KR200392374Y1
KR200392374Y1 KR20-2005-0013232U KR20050013232U KR200392374Y1 KR 200392374 Y1 KR200392374 Y1 KR 200392374Y1 KR 20050013232 U KR20050013232 U KR 20050013232U KR 200392374 Y1 KR200392374 Y1 KR 200392374Y1
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KR
South Korea
Prior art keywords
poppet
check valve
flow
flow path
fluid
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KR20-2005-0013232U
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Korean (ko)
Inventor
최길웅
윤길호
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최길웅
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Priority to KR20-2005-0013232U priority Critical patent/KR200392374Y1/en
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Publication of KR200392374Y1 publication Critical patent/KR200392374Y1/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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
    • 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
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • F16K15/1823—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for ball check 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • 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
    • 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
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

본 고안은 유속감지 체크밸브에 관한 것으로, 보다 상세하게는 급격하고 과도한 유체가 발생하더라도 효과적으로 유압을 감속시켜 안정적으로 유체를 배출시켜 유압회로를 안전하게 동작시킬 수 있고, 또한 원하는 유압을 배기시킬 수 있는 유속감지 체크밸브에 관한 것이다.The present invention relates to a flow rate detection check valve, and more particularly, even when a sudden and excessive fluid occurs, it effectively reduces the hydraulic pressure and reliably discharges the fluid so that the hydraulic circuit can be safely operated and the desired hydraulic pressure can be exhausted. It relates to a flow rate detection check valve.

본 고안은 유로가 관통되어 형성된 몸체를 구비하여 유체를 일방향으로 흐르도록 제어하는 체크밸브에 있어서, 상기 유로는 상기 몸체의 일측 단부에 형성된 입력부(50)로부터 타측의 측면에 형성된 출력부(55)에 관통되어 형성되고, 상기 몸체(10)에는 상기 형성된 유로상에 일정 높이로 돌출되고 일부분이 제거되어 상기 입력부(50)와 출력부(55)를 연통시키는 배출구(14)가 형성된 개폐포트(12)와, 상기 입력부(50) 쪽에서 상기 개폐포트(12)에 안착되어 유로를 개폐하기 위한 포펫(20)과, 상기 포펫(20)과 입력부(50) 사이에서 일정한 탄성을 부여하는 체크스프링(30)과, 상기 포펫(20)과 출력부(55) 사이에서 일정한 탄성을 부여하는 제어스프링(32)과, 상기 제어스프링(32)의 탄성을 제어하기 위해 상기 몸체(10)의 타측과 나사결합되는 유속제어봉(40)을 포함하여 구성되는 것을 특징으로 한다.The present invention has a check valve for controlling a fluid to flow in one direction by having a body formed through the flow path, the flow path is an output portion 55 formed on the other side from the input portion 50 formed at one end of the body It is formed through the through, and the opening and closing port 12 is formed in the body 10 has a discharge port 14 for protruding a predetermined height on the formed flow path and a portion is removed to communicate the input unit 50 and the output unit 55 ), A poppet 20 seated in the opening / closing port 12 on the input part 50 side to open and close the flow path, and a check spring 30 that provides a constant elasticity between the poppet 20 and the input part 50. ), A control spring 32 for providing a constant elasticity between the poppet 20 and the output unit 55, and screwing with the other side of the body 10 to control the elasticity of the control spring 32 Configured to include a flow control rod 40 It is characterized by.

Description

유속감지 체크밸브{CHECK VALVE WITH CURRENT DETECTOR}CHECK VALVE WITH CURRENT DETECTOR}

본 고안은 유속감지 체크밸브에 관한 것으로, 보다 상세하게는 급격하고 과도한 유체가 발생하더라도 효과적으로 유압을 감속시켜 안정적으로 유체를 배출시켜 유압회로를 안전하게 동작시킬 수 있고, 또한 원하는 유압을 배기시킬 수 있는 유속감지 체크밸브에 관한 것이다.The present invention relates to a flow rate detection check valve, and more particularly, even when a sudden and excessive fluid occurs, it effectively reduces the hydraulic pressure and reliably discharges the fluid so that the hydraulic circuit can be safely operated and the desired hydraulic pressure can be exhausted. It relates to a flow rate detection check valve.

본 고안은 유체의 역류를 방지하는 체크밸브에 관한 것으로, 특히 스프링클러나 소화관상에 설치되어 유체의 역류를 이중으로 차단함과 더불어 유체의 흐름과 압력을 감지하는 유체감지용 체크밸브에 관한 것이다.The present invention relates to a check valve for preventing the back flow of the fluid, and more particularly to a check valve for detecting the flow and pressure of the fluid is installed on the sprinkler or the digestive tract double blocking the back flow of the fluid.

일반적으로 체크밸브는 유체가 일방으로 흐르도록 하는 방향제어 밸브의 하나로, 유체의 배출방향에 따라 일자형과 앵글형 등으로 구분할 수 있고, 포펫의 작동수단에 따라 파일럿 조작 체크밸브와 역류 드로틀형 체크밸브 등으로 구분할 수 있다.In general, the check valve is one of directional control valves for allowing fluid to flow in one direction. The check valve can be classified into a straight type and an angle type according to the discharge direction of the fluid, and a pilot operated check valve and a reverse flow throttle type check valve according to the operation means of the poppet. It can be divided into

이러한 종래의 체크밸브는 도3에 도시된 바와 같이, 관상의 몸체(10) 내부에 개폐포트(12)가 형성되어 있고, 상기 개폐포트(12)를 개폐하기 위한 포펫(20)과, 상기 포펫(20)을 일정한 탄력으로 미는 체크스프링(30)으로 구성된다. 즉 유체가 출력부(55)로부터 공급되면 포펫(20)이 개폐포트(12)를 막아 유체가 역방향으로 흐르지 않게 되고, 입력부(50)를 통해 순방향으로 유체가 공급될 경우 유압이 체크스프링(30)의 탄성보다 커야 개폐포트(12)가 개방되어 유체가 흐르게 되는 것이다.This conventional check valve, as shown in Figure 3, the opening and closing port 12 is formed in the tubular body 10, the poppet 20 for opening and closing the opening and closing port 12, and the poppet It consists of a check spring (30) to push the 20 to a certain elasticity. That is, when the fluid is supplied from the output unit 55, the poppet 20 blocks the opening / closing port 12 so that the fluid does not flow in the reverse direction. When the fluid is supplied in the forward direction through the input unit 50, the hydraulic pressure is checked in the spring 30. Opening and closing port 12 is opened to be larger than the elasticity of the fluid will flow.

따라서 체크밸브는 순방향으로 공급되는 유압에 따라 개폐되므로 유체공급장치의 오작동을 방지하게 된다.Therefore, the check valve is opened and closed according to the hydraulic pressure supplied in the forward direction to prevent the malfunction of the fluid supply device.

그러나 상기와 같은 종래의 체크밸브는 체크스프링(30)의 탄성보다 큰 압력이 입력부(50)에 입력되면 포펫(20)이 개방되므로, 급격하고 과도한 유체가 입력되면 체크밸브가 열려 유압회로의 오동작과 손상을 초래하게 되는 문제점이 있다.However, in the conventional check valve as described above, when a pressure greater than the elasticity of the check spring 30 is input to the input unit 50, the poppet 20 is opened, and when a sudden and excessive fluid is input, the check valve opens to malfunction of the hydraulic circuit. There is a problem that causes damage.

본 고안은 상기한 문제점을 해결하기 위한 것으로, 본 고안의 목적은 원하는 유압 이상의 급격하고 과도한 유체가 발생하더라도 효과적으로 유압을 감압시키면서 안정적으로 유체를 배출시켜 유압회로의 오동작을 방지할 수 있는 유속감지 체크밸브를 제공하는 것이다.The present invention is to solve the above problems, an object of the present invention is to check the flow rate detection that can prevent the malfunction of the hydraulic circuit by reliably draining the fluid while effectively reducing the hydraulic pressure even if a sudden and excessive fluid more than the desired hydraulic pressure occurs To provide a valve.

본 고안은 유로가 관통되어 형성된 몸체를 구비하여 유체를 일방향으로 흐르도록 제어하는 체크밸브에 있어서, 상기 유로는 상기 몸체의 일측 단부에 형성된 입력부(50)로부터 타측의 측면에 형성된 출력부(55)에 관통되어 형성되고, 상기 몸체(10)에는 상기 형성된 유로상에 일정 높이로 돌출되고 일부분이 제거되어 상기 입력부(50)와 출력부(55)를 연통시키는 배출구(14)가 형성된 개폐포트(12)와, 상기 입력부(50) 쪽에서 상기 개폐포트(12)에 안착되어 유로를 개폐하기 위한 포펫(20)과, 상기 포펫(20)과 입력부(50) 사이에서 일정한 탄성을 부여하는 체크스프링(30)과, 상기 포펫(20)과 출력부(55) 사이에서 일정한 탄성을 부여하는 제어스프링(32)과, 상기 제어스프링(32)의 탄성을 제어하기 위해 상기 몸체(10)의 타측과 나사결합되는 유속제어봉(40)을 포함하여 구성되는 것을 특징으로 한다.The present invention has a check valve for controlling a fluid to flow in one direction by having a body formed through the flow path, the flow path is an output portion 55 formed on the other side from the input portion 50 formed at one end of the body It is formed through the through, and the opening and closing port 12 is formed in the body 10 has a discharge port 14 for protruding a predetermined height on the formed flow path and a portion is removed to communicate the input unit 50 and the output unit 55 ), A poppet 20 seated in the opening / closing port 12 on the input part 50 side to open and close the flow path, and a check spring 30 that provides a constant elasticity between the poppet 20 and the input part 50. ), A control spring 32 for providing a constant elasticity between the poppet 20 and the output unit 55, and screwing with the other side of the body 10 to control the elasticity of the control spring 32 Configured to include a flow control rod 40 It is characterized by.

이하, 첨부된 도면을 참조하여 본 고안의 유속감지 체크밸브를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the flow rate detection check valve of the present invention.

도1은 본 발명의 일실시예에 의한 유속감지 체크밸브의 단면구성도이고, 도2는 도1의 A-A선의 단면도이다.1 is a cross-sectional view of the flow rate detection check valve according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line A-A of FIG.

본 고안의 바람직한 실시예에 의한 유속감지 체크밸브는 상기 도1 및 도2에 도시된 바와 같이, 일측의 단부에 형성된 입력부(50)로부터 타측의 측면에 형성된 출력부(55)에 관통되어 유로가 형성되고 상기 유로상에 일정 높이로 돌출되어 개폐포트(12)가 형성된 몸체(10)와, 상기 입력부(50) 쪽에서 상기 개폐포트(12)에 안착되어 유로를 개폐하기 위한 포펫(20)과, 상기 포펫(20)과 입력부(50) 사이에서 일정한 탄성을 부여하는 체크스프링(30)과, 상기 포펫(20)과 출력부(55) 사이에서 일정한 탄성을 부여하는 제어스프링(32)과, 상기 제어스프링(32)의 탄성을 제어하기 위해 상기 몸체(10)의 타측과 나사결합되는 유속제어봉(40)을 포함하여 구성된다.As shown in FIG. 1 and FIG. 2, the flow rate detection check valve according to the preferred embodiment of the present invention penetrates through the output part 55 formed on the other side from the input part 50 formed at the end of one side. A body 10 formed to protrude at a predetermined height on the flow path, the opening and closing port 12 being formed, the poppet 20 seated on the opening and closing port 12 at the input part 50 to open and close the flow path, A check spring 30 for providing a constant elasticity between the poppet 20 and the input unit 50, a control spring 32 for providing a constant elasticity between the poppet 20 and the output unit 55, and the It is configured to include a flow rate control rod 40 is screwed with the other side of the body 10 to control the elasticity of the control spring (32).

즉 상기 포펫(20)을 입력부(50) 쪽에서 체크스프링(30)에 의해 탄성되어 상기 개폐포트(12)를 폐쇄시키게 되고, 또한 상기 체크스프링(30)의 반대편에 위치한 제어스프링(32)은 이러한 체크스프링(30)의 탄성을 조절하게 된다.That is, the poppet 20 is elastically closed by the check spring 30 on the input part 50 side to close the opening / closing port 12, and the control spring 32 located on the opposite side of the check spring 30 is The elasticity of the check spring 30 is adjusted.

또한 상기 개폐포트(12)는 상기 포펫(20)과 접촉면적을 확장시키기 위해 포펫(20)에 대응되도록 경사면(16)이 형성되고, 상기 경사면(16)에는 일부가 제거되어 상기 입력부(50)와 출력부(55)를 연통시키는 배출구(14)가 형성되어 있다.In addition, the opening and closing port 12 is formed with an inclined surface 16 to correspond to the poppet 20 to expand the contact area with the poppet 20, a portion of the inclined surface 16 is removed to the input unit 50 And an outlet 14 for communicating the output unit 55 with each other.

한편, 상기 포펫(20)은 상기 개폐포트(12)를 효과적으로 개폐시킬 수 있는 구형이나 사다리꼴형 등 다양한 형상으로 형성될 수 있으나, 본 고안에서는 포펫(20)의 형상에 의해 한정되지는 않는다.On the other hand, the poppet 20 may be formed in a variety of shapes, such as spherical or trapezoidal that can effectively open and close the opening and closing port 12, in the present invention is not limited to the shape of the poppet (20).

상기와 같이 구성된 본 고안의 작용 효과를 살펴보면, 먼저 상기 제어스프링(32)의 탄성을 조절하기 위한 유속제어봉(40)을 회전시켜 유로상에 적절한 유압이 형성되도록 한다.Looking at the effect of the present invention configured as described above, first to rotate the flow rate control rod 40 for adjusting the elasticity of the control spring 32 so that the appropriate hydraulic pressure is formed on the flow path.

다시 말해 상기 포펫(20)은 입력부(50) 측에 장착된 체크스프링(30)에 의해 개폐포트(12)쪽으로 탄성되어 개폐포트(12)를 폐쇄시키고, 탄성된 포펫(20)을 출력부(55) 측에 장착된 제어스프링(32)에 의해 입력부(50) 쪽으로 다시 탄성시켜 상기 개폐포트(12)를 개방시키게 된다.In other words, the poppet 20 is elastically opened and closed toward the opening and closing port 12 by the check spring 30 mounted on the input unit 50, and closes the opening and closing port 12, and the elastic poppet 20 is output to the output unit ( The opening and closing port 12 is opened by elasticity toward the input unit 50 by the control spring 32 mounted on the 55 side.

따라서 상기 제어스프링(32)에 연결된 유속제어봉(40)을 조절하여 상기 포펫(20)의 개방상태를 제어하게 된다.Therefore, by controlling the flow rate control rod 40 connected to the control spring 32 to control the open state of the poppet (20).

한편, 입력부(50)를 통해 상기 제어스프링(32)의 탄성보다 크면서 급격하고 과도한 유체가 유입되게 되면, 상기 포펫(20)은 개폐포트(12)를 폐쇄하게 된다. 그리고 상기 개폐포트(12)의 일부분이 제거되어 형성된 배출구(14)를 통해 상기 과도한 유체에 의해 형성된 배압의 일부분이 출력부(55)로 배기되고, 상기 입력부(50)에 형성된 배압을 충분히 배출구(14)를 통해 출력부(55)로 배기하여 과도한 압력을 감압시켜 다시 개폐포트(12)를 개방시킨 원상태로 회복시키게 된다.On the other hand, when the fluid is larger than the elasticity of the control spring 32, the rapid and excessive fluid flows through the input unit 50, the poppet 20 closes the opening and closing port 12. A portion of the back pressure formed by the excessive fluid is exhausted to the output unit 55 through a discharge port 14 formed by removing a portion of the opening / closing port 12, and the exhaust port formed in the input unit 50 is sufficiently discharged ( Exhaust to the output unit 55 through 14) to reduce the excessive pressure to restore the original opening and closing port 12 again.

따라서 급격하고 과도한 유체가 유입되더라도 유체의 흐름을 완전차단시키지 않고 서서히 압력을 감압시켜 유압회로시스템이 안정적으로 동작되도록 한다.Therefore, even when a sudden and excessive fluid is introduced, the hydraulic circuit system is stably operated by reducing the pressure gradually without completely blocking the flow of the fluid.

앞에서 설명되고, 도면에 도시된 본 고안의 일 실시예는 본 고안의 기술적사상을 한정하는 것으로 해석되어서는 안 된다. 본 고안의 보호범위는 청구범위에 기재된 사항에 의하여만 제한되고, 본 고안의 기술분야에서 통상의 지식을 가진 자는 본 고안의 기술적 사상을 다양한 형태로 개량 변경하는 것이 가능하다. 따라서 이러한 개량 및 변경은 통상의 지식을 가진 자에게 자명한 것인 한 본 고안의 보호범위에 속하게 될 것이다.An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

상술한 바와 같이 본 고안에 따르면, 원하는 유압 이상의 급격하고 과도한 유체가 입력되더라도 효과적으로 유압을 감압시켜면서 안정적으로 유체를 배출시켜 유압회로의 오동작을 방지하여 유압회로시스템을 안정적으로 동작되게 한다.As described above, according to the present invention, even when a sudden and excessive fluid of more than the desired hydraulic pressure is input, while effectively reducing the hydraulic pressure to discharge the fluid stably to prevent the malfunction of the hydraulic circuit to operate the hydraulic circuit system stably.

도1은 본 발명의 일실시예에 의한 유속감지 체크밸브의 단면구성도,1 is a cross-sectional configuration diagram of a flow rate detection check valve according to an embodiment of the present invention;

도2는 도1의 A-A선의 단면도,2 is a cross-sectional view taken along the line A-A of FIG.

도3은 종래의 일반적인 체크밸브의 단면구성도.Figure 3 is a cross-sectional view of a conventional general check valve.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

10: 몸체 12: 개폐포트10: body 12: opening and closing port

14: 배출구 16: 경사면14: outlet 16: slope

20: 포펫 30: 체크스프링20: Poppet 30: Check spring

32: 제어스프링 40: 유속제어봉32: control spring 40: flow control rod

50: 입력부 55: 출력부50: input unit 55: output unit

Claims (1)

유로가 관통되어 형성된 몸체를 구비하여 유체를 일방향으로 흐르도록 제어하는 체크밸브에 있어서,In the check valve for controlling the flow of fluid in one direction having a body formed through the flow path, 상기 유로는 상기 몸체의 일측 단부에 형성된 입력부(50)로부터 타측의 측면에 형성된 출력부(55)에 관통되어 형성되고,The flow path is formed through the output unit 55 formed on the other side from the input unit 50 formed at one end of the body, 상기 몸체(10)에는 상기 형성된 유로상에 일정 높이로 돌출되고 일부분이 제거되어 상기 입력부(50)와 출력부(55)를 연통시키는 배출구(14)가 형성된 개폐포트(12)와, 상기 입력부(50) 쪽에서 상기 개폐포트(12)에 안착되어 유로를 개폐하기 위한 포펫(20)과, 상기 포펫(20)과 입력부(50) 사이에서 일정한 탄성을 부여하는 체크스프링(30)과, 상기 포펫(20)과 출력부(55) 사이에서 일정한 탄성을 부여하는 제어스프링(32)과, 상기 제어스프링(32)의 탄성을 제어하기 위해 상기 몸체(10)의 타측과 나사결합되는 유속제어봉(40)을 포함하여 구성되는 것을 특징으로 하는 유속감지 체크밸브.The body 10 has an opening and closing port 12 having a discharge port 14 for protruding a predetermined height on the formed flow path and a portion thereof is removed to communicate the input unit 50 and the output unit 55, and the input unit ( The poppet 20 seated on the opening / closing port 12 at the side 50 to open and close the flow path, a check spring 30 providing constant elasticity between the poppet 20 and the input unit 50, and the poppet ( 20 and the output spring 55, the control spring 32 to give a constant elasticity, and the flow control rod 40 is screwed with the other side of the body 10 to control the elasticity of the control spring (32) Flow rate detection check valve, characterized in that comprising a.
KR20-2005-0013232U 2005-05-11 2005-05-11 Check valve with current detector KR200392374Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20-2005-0013232U KR200392374Y1 (en) 2005-05-11 2005-05-11 Check valve with current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20-2005-0013232U KR200392374Y1 (en) 2005-05-11 2005-05-11 Check valve with current detector

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