KR101390884B1 - Check valve backflow testing apparatus and method - Google Patents

Check valve backflow testing apparatus and method Download PDF

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KR101390884B1
KR101390884B1 KR1020130039180A KR20130039180A KR101390884B1 KR 101390884 B1 KR101390884 B1 KR 101390884B1 KR 1020130039180 A KR1020130039180 A KR 1020130039180A KR 20130039180 A KR20130039180 A KR 20130039180A KR 101390884 B1 KR101390884 B1 KR 101390884B1
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South Korea
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check valve
valve
test
pressure
rupture
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KR1020130039180A
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Korean (ko)
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김종석
이선기
박준현
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한국수력원자력 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/003—Machine 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
    • F16K15/00—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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S251/00—Valves and valve actuation

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

Abstract

The present invention is to provide a check valve backflow test device capable of performing a precise backflow test by rapidly discharging the downstream pressure of a check valve for a test to make pressures at the front and the rear ends of the check valve different and a method. In the check valve backflow test device to achieve the purpose according to the present invention, a check valve downstream pipe is connected to the downstream of the check valve for a test, and a first rupture disk is connected to the check valve downstream pipe. Also, a secondary pressure drum is connected to the first rupture disk, and a second rupture disk, a discharge valve, a high-pressure nitrogen gas supply pipe, and a water supply valve are connected to the secondary pressure drum. The check valve backflow test method to achieve the purpose according to the present invention is a check valve backflow test method using the check valve backflow test device mentioned in a claim 1. The check valve backflow test method comprises: a step of installing the check valve for a test, the first and second rupture disks, and the secondary pressure drum (S100); a step of charging water to a check valve upstream pipe, the check valve downstream pipe, and the secondary pressure drum by opening a water shutoff valve (S200); a step of pressurizing nitrogen to the check valve upstream and downstream pipes by controlling the high-pressure nitrogen gas supply valve (S300); a step of opening the discharge valve connected to the secondary pressure drum (S400); a step of discharging the fluid to the outside while the first and second rupture disks are ruptured; a step of measuring the pressures at the front and rear ends of the check valve for a test and the opening and closing time of the check valve (S600); and a step of measuring the leaked amount of the check valve for a test (S700).

Description

체크밸브 역류시험장치 및 방법{Check valve backflow testing apparatus and method}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve backflow testing apparatus and method,

본 발명은 체크밸브 역류시험장치 및 방법에 관한 것으로, 특히 체크밸브가 사용압력에서 급격히 닫힐 때 체크밸브의 닫힘 시간과 배관 내의 압력 변화를 정확히 측정하기 위한 체크밸브 역류시험장치 및 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve backflow test apparatus and method, and more particularly, to a check valve backflow test apparatus and method for accurately measuring a closing time of a check valve and a pressure change in a pipe when the check valve is abruptly closed at a working pressure.

일반적으로 체크밸브는 배관계통에서 유체가 반대방향으로 흐르는 것을 방지할 목적으로 사용된다.In general, check valves are used to prevent fluid from flowing in the piping system in the opposite direction.

따라서 체크밸브에서 가장 기본적인 기능은 역류에 대한 누설 차단이다.Therefore, the most basic function of the check valve is leakage blocking against backflow.

체크밸브 역류 누설 차단시험에서는 체크밸브에 역방향으로 압력을 가하여 디스크가 시트 밀착부위에서 유체가 누설되는 정도를 측정한다.In the check valve backflow leakage test, pressure is applied to the check valve in the reverse direction to measure the degree of leakage of the fluid from the sheet-contact area of the disk.

체크밸브가 고압 배관계통에서 사용되는 경우에는 체크밸브 디스크가 빠르게 닫힐 때 발생하는 충격과 압력변화로 인해 수격현상(water hammering)이 발생되기도 한다.When a check valve is used in a high pressure piping system, water hammering may occur due to impact and pressure changes that occur when the check valve disc closes quickly.

이러한 수격현상에는 소음과 충격이 동반되게 마련이며, 충격이 심한 경우에는 밸브, 배관 등이 손상되기도 한다.Such a water hammer phenomenon is accompanied by noise and impact, and when the impact is severe, the valves and pipes may be damaged.

따라서, 원자력발전소에 사용되는 안전등급 체크밸브는 운전조건에서 역류시험을 하여 체크밸브의 닫힘 시간, 닫힐 때 압력변화 등과 같은 변수를 측정하여 이상 유무를 확인할 것을 요구하고 있다.Therefore, safety grade check valves used in nuclear power plants require reverse flow test under operating conditions to check the parameters such as the closing time of the check valve and the pressure change when the valve is closed.

이러한 시험에 대한 기준으로는 대한민국 전력산업기술기준(KEPIC) 능동밸브 조립품의 성능검증(MFC) 등이 있다.The criteria for these tests are the performance verification (MFC) of KEPIC active valve assemblies.

체크밸브 역류시험에서는 체크밸브 상류 측에 압력을 가하는 장치가 필요하며, 하류 측에는 상류 측에서 가한 압력을 신속하게 방출시키는 장치(밸브, 파열판 등)가 필요하다.In the check valve backflow test, a device for applying pressure to the upstream side of the check valve is required. On the downstream side, a device (valve, rupture plate, etc.) for quickly releasing the pressure applied from the upstream side is required.

도 1에 도시된 바와 같이, 체크밸브 디스크를 약간 들어올린 상태에서 상류 측에 압력을 가한 후에 하류 측에서 재빠르게 압력을 방출하면 유체가 역방향으로 흐르며, 체크밸브 디스크가 낙하한다.As shown in Fig. 1, when pressure is applied to the upstream side while the check valve disk is slightly lifted and then pressure is rapidly released from the downstream side, the fluid flows in the reverse direction, and the check valve disk falls.

이때 체크밸브가 닫히는 시간과 배관 내의 압력변화를 측정한다.At this time, the time when the check valve is closed and the pressure change in the pipe are measured.

체크밸브가 재빨리 닫히게 하기 위해서는 체크밸브 하류 측 배관 및 압력방출장치의 직경이 충분히 커서 하류측의 압력 방출이 신속히 이루어져야 한다.In order for the check valve to close quickly, the diameter of the pipe downstream of the check valve and the pressure relief device must be sufficiently large so that the pressure release on the downstream side is expedited.

그러나 체크밸브의 직경이 커지고 시험압력이 높아질수록 하류 측에서 신속히 압력을 방출하는 것이 어렵게 된다.However, as the diameter of the check valve increases and the test pressure increases, it becomes more difficult to release the pressure quickly on the downstream side.

도 2에 도시된 바와 같이, 체크밸브 하류 측 압력방출장치로 방출밸브(108)를 사용하는 경우에, 체크밸브 크기가 커지거나 체크밸브 시험압력이 증가하면 방출밸브 개방에 필요한 시간이 증가되고, 방출밸브 작동에 필요한 힘이 증가되어 신속한 밸브 개방이 어렵게 된다.2, when the discharge valve 108 is used as the check valve downstream pressure release device, the time required for opening the discharge valve is increased when the check valve size is increased or when the check valve test pressure is increased, The force required to operate the discharge valve is increased, which makes it difficult to quickly open the valve.

밸브 직경을 작게 하는 경우에는 방출유량이 적어져서 체크밸브 닫힘 시간이 증가되어 정확한 실증시험이 어렵게 된다.When the valve diameter is reduced, the discharge flow rate is reduced and the check valve closing time is increased, which makes it difficult to carry out an accurate verification test.

도 3에 도시된 바와 같이, 체크밸브 하류 측 압력방출장치로 파열판(rupter disc, 105)을 사용하는 경우에는 파열판의 크기와 압력이 증가할수록 파열판의 파열압력 오차가 증가되어 정확한 체크밸브 역류시험 압력을 달성하기가 어려운 문제점이 있다.3, when the rupture disc 105 is used as the pressure releasing device on the downstream side of the check valve, the rupture pressure error of the rupture plate increases as the size and pressure of the rupture plate increase, Is difficult to achieve.

또한, 체크밸브 역류시험에 필요한 압력별로 파열판을 구비해야 하는 번거로움도 있다.In addition, there is a need to provide a rupture plate for each pressure required for the check valve backflow test.

이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로, 시험용 체크밸브 하류 측 압력을 신속하게 방출하여 정확한 체크밸브 전후단 차압조건을 제공하여, 정밀한 역류시험이 이루어지도록 한 체크밸브 역류시험장치 및 방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a check valve for accurately performing reverse flow test by quickly releasing a downstream pressure of a test check valve, And an object of the present invention is to provide a counterflow test apparatus and method.

상기한 목적을 달성하기 위한 본 발명에 따른 체크밸브 역류시험장치는 시험용 체크밸브의 하류측에 체크밸브 하류측 배관이 연결되고, 상기 체크밸브 하류측 배관에 제1파열판이 연결되며, 상기 제1파열판에 2차압력드럼이 연결되며, 상기 2차압력드럼에 배기밸브, 제2파열판, 방출밸브, 고압질소가스공급관, 급수밸브가 연결됨을 특징으로 한다.In order to attain the above object, a check valve backflow test apparatus according to the present invention is characterized in that a check valve downstream pipe is connected to a downstream side of a test check valve, a first rupture plate is connected to a pipe on a downstream side of the check valve, A second pressure drum is connected to the rupture plate, and an exhaust valve, a second rupture plate, a discharge valve, a high-pressure nitrogen gas supply pipe, and a water supply valve are connected to the secondary pressure drum.

또한, 상기한 목적을 달성하기 위한 본 발명에 따른 체크밸브 역류시험 방법은 청구항 제1항 기재의 체크밸브 역류시험장치를 이용한 체크밸브 역류시험방법으로서, 시험용 체크밸브, 제1, 2파열판, 2차압력드럼을 설치하는 단계(S 100); 체크밸브 상, 하류측 배관과 2차압력드럼에 급수 차단밸브를 개방하여 물을 충수하는 단계(S 200); 체크밸브 상, 하류측 배관에 고압질소가스공급밸브를 조절하여 질소를 가압하는 단계(S 300); 2차압력드럼에 연결된 방출밸브를 개방하는 단계(S 400); 제1, 2파열판이 파열됨과 동시에 외부로 유체가 방출되는 단계(S 500); 시험용 체크밸브의 전후단 압력, 밸브 개도, 닫김 시간 측정단계(S 600); 시험용 체크밸브의 누설량 측정단계(S 700)로 이루어짐을 특징으로 한다.In order to accomplish the above object, a check valve backflow test method according to the present invention is a check valve backflow test method using the check valve backflow test apparatus described in claim 1, wherein the test check valve, the first and second rupture plates, Installing a differential pressure drum (S100); Closing the water shutoff valve on the check valve, the downstream pipe, and the secondary pressure drum (S 200); Controlling the high-pressure nitrogen gas supply valve on the check valve upstream side and the downstream side pipe to pressurize nitrogen (S 300); Opening (S 400) a discharge valve connected to the secondary pressure drum; (S 500) in which the first and second rupture plates are ruptured and the fluid is discharged to the outside; Measuring the front and rear pressure, valve opening and closing time of the test check valve (S 600); And a step (S700) of measuring leakage of the test check valve.

이상에서 설명한 바와 같이, 본 발명에 따른 체크밸브 역류시험장치 및 방법은 다음과 같은 효과가 있다.As described above, the check valve backflow test apparatus and method according to the present invention have the following effects.

첫째, 본 발명은 2차압력드럼의 방출밸브를 개방하면 이와 동시에 파열판이 파열되어 역류되는 유체가 원활히 배출되도록 설계되어, 체크밸브 역류시험을 수행할 때, 시험조건(압력, 유량)을 정확히 구현함으로써 정밀한 체크밸브 역류시험이 이루어지는 효과가 있다.First, according to the present invention, when the discharge valve of the secondary pressure drum is opened, the rupture plate is ruptured and the fluid that flows backward is smoothly discharged. Therefore, when the check valve backflow test is performed, the test conditions (pressure and flow rate) The check valve reverse flow test is effected.

둘째, 본 발명은 체크밸브 시험압력보다 낮은 파열압력의 파열판을 사용함으로써 파열판 구입비(파열압력이 증가될 수록 파열판 단가가 높아짐)를 절감할 수 있는 이점이 있다.Second, the present invention has an advantage that the cost of purchasing the rupture plate (the rupture cost increases as the rupture pressure increases) is used by using the rupture plate having the rupture pressure lower than the check valve test pressure.

도 1은 종래의 시험용 체크밸브를 도시한 예시도,
도 2는 종래의 압력방출장치로 방출밸브가 사용되는 체크밸브 역류시험장치를 도시한 계통도,
도 3은 종래의 압력방출장치로 파열판 1개 사용되는 체크밸브 역류시험장치를 도시한 계통도,
도 4는 본 발명에 따른 체크밸브 역류시험장치를 도시한 계통도,
도 5는 본 발명에 따른 체크밸브 역류시험장치의 역류시험에서 취득한 체크밸브 디스크 닫힘 시간과 이동거리를 도시한 그래프,
도 6은 본 발명에 따른 체크밸브 역류시험장치의 역류시험에서 취득한 체크밸브 디스크 닫힘 시간과 압력변동을 도시한 그래프,
도 7은 본 발명에 따른 체크밸브 역류시험장치를 이용한 시험과정을 도시한 공정도.1 is an illustration showing a conventional test check valve,
2 is a flow diagram showing a check valve backflow test apparatus in which a discharge valve is used as a conventional pressure relief device,
3 is a flow diagram showing a check valve backflow test apparatus using a single rupture plate as a conventional pressure relief device,
4 is a flow diagram illustrating a check valve backflow test apparatus according to the present invention,
5 is a graph showing the check valve disk closing time and moving distance obtained in the backflow test of the check valve backflow test apparatus according to the present invention,
6 is a graph showing the check valve disc closing time and pressure fluctuation obtained in the backflow test of the check valve backflow test apparatus according to the present invention,
7 is a process chart showing a test procedure using a check valve backflow test apparatus according to the present invention.

이하, 본 발명을 첨부한 예시도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 4는 본 발명에 따른 파열판이 장착된 체크밸브 역류시험장치를 도시한 계통도이다.4 is a schematic diagram showing a check valve backflow test apparatus equipped with a rupture disc according to the present invention.

이 도면에 도시된 바와 같이, 본 발명에 따른 체크밸브 역류시험장치(A)는 시험용 체크밸브(103)의 하류측에 체크밸브 하류측 배관(104)이 연결되고, 상기 체크밸브 하류측 배관(104)에 제1파열판(105)이 연결되며, 상기 제1파열판(105)에 2차압력드럼(106)이 연결되며, 상기 2차압력드럼(106)에 배기밸브(106-1), 제2파열판(107), 방출밸브(108), 고압질소가스공급관(203), 급수밸브(302)가 연결된다.As shown in this figure, the check valve backflow test apparatus A according to the present invention is configured such that the check valve downstream pipe 104 is connected to the downstream side of the test check valve 103, The first rupture plate 105 is connected to the first rupture plate 105 and the second pressure drum 106 is connected to the first rupture plate 105. The second pressure drum 106 is connected to the exhaust valve 106-1, 2 rupture plate 107, a discharge valve 108, a high-pressure nitrogen gas supply pipe 203, and a water supply valve 302 are connected.

또한, 상기 고압질소가스공급관(203)에 압력계(203-1)가 연결되고, 상기 압력계(203-1)에 차단밸브(202)가 연결되며, 상기 차단밸브(202)에 압력제어밸브(201)가 연결된다.A pressure gauge 203-1 is connected to the high-pressure nitrogen gas supply pipe 203, a shutoff valve 202 is connected to the pressure gauge 203-1, a pressure control valve 201 ).

즉, 본 발명에 따른 체크밸브 역류시험장치(A)는 도 1에 도시된 바와 같이, 시험용 체크밸브 하류측 배관(104)에 2개의 제1, 2파열판(105, 107)이 연결된 2차압력드럼(106)이 설치되며, 상기 2차압력드럼(106)에는 방출밸브(108), 급수밸브(302), 배기밸브(106-1), 고압질소가스공급관(203)이 연결된다.That is, as shown in FIG. 1, the check valve backflow test apparatus A according to the present invention is a test valve backflow test apparatus A according to the present invention, in which the first and second rupture plates 105 and 107 are connected to a downstream side check valve 104, A discharge valve 108, a water supply valve 302, an exhaust valve 106-1 and a high-pressure nitrogen gas supply pipe 203 are connected to the secondary pressure drum 106. [

여기서, 상기 제1, 2파열판(105, 107)은 순간적으로 파열되어, 시험용 체크밸브(103)에서 빠르게 역류가 발생되도록 하기 위함이다.Here, the first and second rupture plates 105 and 107 are momentarily ruptured so that the test check valve 103 rapidly generates reverse flow.

또한, 상기 방출밸브(108)는 2차압력드럼(106)의 압력을 방출하여 제1, 2파열판(105, 107)이 파열되도록 하기 위함이다.In addition, the discharge valve 108 discharges the pressure of the secondary pressure drum 106 so that the first and second rupture plates 105 and 107 are ruptured.

그리고 상기 급수밸브(302), 배기밸브(106-1)는 2차압력드럼(106)에 시험용 물을 충수하고, 공기를 배기하기 위함이며, 고압질소가스공급관(203)은 2차압력드럼(106)에 압력을 가하기 위함이다.The water supply valve 302 and the exhaust valve 106-1 are for sucking test water into the secondary pressure drum 106 to exhaust air and the high pressure nitrogen gas supply pipe 203 is connected to the secondary pressure drum 106).

상기한 바와 같은 구성으로 이루어진 본 발명에 따른 체크밸브 역류시험장치(A)는 2차압력드럼(106)의 방출밸브(108)를 개방하면, 이와 동시에 제1, 2파열판(105, 107)이 파열되어 역류되는 유체가 원활히 배출되는 작용효과가 있다.When the discharge valve 108 of the secondary pressure drum 106 is opened, the first and second rupture plates 105 and 107 are opened at the same time as the check valve backflow test apparatus A according to the present invention having the above- There is an effect that the fluid that ruptures and flows backward is smoothly discharged.

이하, 상기한 바와 같은 구성으로 이루어진 본 발명에 따른 체크밸브 역류시험에 대해 설명한다.Hereinafter, the check valve backflow test according to the present invention constructed as described above will be described.

도 7은 본 발명에 따른 체크밸브 역류시험장치를 이용한 시험과정을 도시한 공정도이다.7 is a process diagram showing a test procedure using a check valve backflow test apparatus according to the present invention.

이 도면에 도시된 바와 같이, 본 발명에 따른 체크밸브 역류시험방법은 시험용 체크밸브(103)의 하류측에 체크밸브 하류측 배관(104)이 연결되고, 상기 체크밸브 하류측 배관(104)에 제1파열판(105)이 연결되며, 상기 제1파열판(105)에 2차압력드럼(106)이 연결되며, 상기 2차압력드럼(106)에 배기밸브(106-1), 제2파열판(107), 방출밸브(108), 고압질소가스공급관(203), 급수밸브(302)가 연결된 체크밸브 역류시험장치(A)를 이용한 체크밸브 역류시험방법으로서, 시험용 체크밸브(103), 제1, 2파열판(105, 107), 2차압력드럼(106)을 설치하는 단계(S 100); 체크밸브 상, 하류측 배관(102, 104)과 2차압력드럼(106)에 급수 차단밸브(301, 302)를 개방하여 물을 충수하는 단계(S 200); 체크밸브 상, 하류측 배관(102, 104)에 고압질소가스공급밸브(200)를 조절하여 질소를 가압하는 단계(S 300); 2차압력드럼(106)에 연결된 방출밸브(108)를 개방하는 단계(S 400); 제1, 2파열판(105, 107)이 파열됨과 동시에 외부로 유체가 방출되는 단계(S 500); 시험용 체크밸브(103)의 전후단 압력, 밸브 개도, 닫김 시간 측정단계(S 600); 시험용 체크밸브(103)의 누설량 측정단계(S 700)로 이루어진다.As shown in this figure, in the check valve backflow test method according to the present invention, the check valve downstream pipe 104 is connected to the downstream side of the test check valve 103, and the check valve downstream pipe 104 A second rupture drum 106 is connected to the first rupturing plate 105 and an exhaust valve 106-1 and a second rupture plate 106 are connected to the second pressure drum 106, A check valve backflow test method using a check valve backflow test apparatus A connected to a discharge valve 108, a high-pressure nitrogen gas supply pipe 203 and a water supply valve 302, , Installing two rupture disks (105, 107) and a secondary pressure drum (106) (S100); Opening the water shutoff valves 301 and 302 to the check valve upstream and downstream pipes 102 and 104 and the secondary pressure drum 106 to add water (S 200); Controlling the high-pressure nitrogen gas supply valve (200) on the check valve upstream and downstream pipes (102, 104) to pressurize nitrogen (S 300); Opening (S 400) the discharge valve (108) connected to the secondary pressure drum (106); A step S 500 of rupturing the first and second rupture plates 105 and 107 and discharging the fluid to the outside; Measuring the front and rear end pressure, valve opening and closing time of the check check valve 103 (S 600); And a leakage amount measurement step (S700) of the test check valve (103).

즉, 본 발명에 따른 체크밸브 역류시험방법을 수행하기 위해서는 도 1에 도시된 바와 같이, 시험용 체크밸브(103)의 디스크(103-1)를 연선(103-3)으로 연결하여 체크밸브 덮개(103-2)에 매달아 놓는다. 시험용 체크밸브(103)의 역류시험시 역방향으로 유체가 흐름과 동시에 디스크(103-1)가 낙하되어, 닫히도록 연선(103-3)은 충분히 약한 재질을 사용해야 한다.That is, in order to perform the check valve backflow test method according to the present invention, as shown in FIG. 1, the disk 103-1 of the test check valve 103 is connected to the check valve cover 103-2). During the backward flow test of the test check valve 103, the strand 103-3 should be made of a sufficiently weak material so that the disk 103-1 falls and closes simultaneously with the flow of the fluid in the reverse direction.

시험용 체크밸브(103)와 제1, 2파열판(105, 107)을 체크밸브 역류시험장치(A)에 설치한다. The test check valve 103 and the first and second rupture plates 105 and 107 are installed in the check valve backflow test apparatus A. [

시험용 체크밸브(103)의 역류시험시 시험용 체크밸브(103)를 역류하는 유체가 원활하게 방출되도록 체크밸브 하류측 배관(104), 제1, 2파열판(105, 107) 및 방출밸브(108)는 충분히 큰 직경의 자재를 사용해야 한다. The check valve downstream pipe 104, the first and second rupture plates 105 and 107, and the discharge valve 108 are provided so as to smoothly discharge the fluid for backward flow through the test check valve 103 during the backflow test of the test check valve 103, Should be of sufficiently large diameter.

여기서, 상기 제1, 2파열판(105, 107)의 파열압력은 시험용 체크밸브(103)의 시험압력보다 낮은 것을 사용한다.The rupture pressure of the first and second rupture plates 105 and 107 is lower than the test pressure of the test check valve 103.

차단밸브(301)와 급수밸브(302)를 개방하여 시험용 체크밸브(103)의 상류, 하류측 배관(102, 104)과 2차압력드럼(106)에 물을 충수한다.The shutoff valve 301 and the water supply valve 302 are opened to water the upstream and downstream pipes 102 and 104 and the secondary pressure drum 106 of the test check valve 103.

이때, 배기밸브(104-2, 106-1)를 개방하여 시험용 체크밸브(103)의 상류, 하류측 배관(102, 104) 내의 공기를 완전히 배출시킨다.At this time, the exhaust valves 104-2 and 106-1 are opened to completely discharge the air in the upstream and downstream pipes 102 and 104 of the check check valve 103 for test.

또한, 상기 체크밸브 상류측 배관(102)에는 서서히 물을 채워 체크밸브 디스크(103-1)가 낙하되지 않도록 주의한다.The check valve upstream pipe 102 is filled with water gradually so that the check valve disk 103-1 is not dropped.

고압질소가스공급밸브(200)를 조절하여 체크밸브 상, 하류측 배관(102, 104)을 가압한다.The high-pressure nitrogen gas supply valve 200 is adjusted to press the check valve upstream and downstream pipes 102 and 104.

이때 제1, 2파열판(105, 107)의 전후단 압력차가 파열압력에 도달되지 않도록 주의한다.At this time, care must be taken to prevent the pressure difference between the front and rear ends of the first and second rupture plates 105 and 107 from reaching the rupture pressure.

예를 들어, 시험용 체크밸브(103) 역류시험 압력이 100㎏/㎠이면 파열압력이 60㎏/㎠인 파열판을 선택한다.For example, if the test check pressure of the test check valve (103) is 100 kg / cm 2, a rupture plate having a burst pressure of 60 kg / cm 2 is selected.

체크밸브 상, 하류측 배관(102, 104)에 가압이 완료되면 고압질소가스공급밸브(202)를 차단한다.The high-pressure nitrogen gas supply valve 202 is shut off when the pressurization of the check valve upstream and downstream pipes 102 and 104 is completed.

2차압력드럼(106)에 연결된 방출밸브(108)를 신속히 개방하면 2차압력드럼(106)의 압력이 급격히 떨어지며 제1파열판(105)의 전후 차압이 파열압력을 초과하여 제1파열판(105)이 파열된다. When the discharge valve 108 connected to the secondary pressure drum 106 is quickly opened, the pressure of the secondary pressure drum 106 abruptly drops and the pressure difference between the front and rear of the first rupture plate 105 exceeds the rupture pressure, Is ruptured.

상기 제1파열판(105)이 파열되면 시험용 체크밸브(103)에 역류가 발생하며 디스크(103-1)가 낙하하며, 닫히게 된다.When the first rupture disk 105 is ruptured, a reverse flow occurs in the test check valve 103 and the disk 103-1 falls and is closed.

이때 상기 시험용 체크밸브(103)를 역류하는 유체의 관성력에 의해 제2파열판(107)이 파열되며 외부로 유체가 방출된다.At this time, the second rupturing plate 107 is ruptured by the inertial force of the fluid flowing backward through the test check valve 103, and the fluid is discharged to the outside.

이러한 제2파열판(107) 파열, 시험용 체크밸브(103) 닫힘 동작은 방출밸브(108)를 개방함과 동시에 아주 빠른 시간 내에 이루어진다.The rupture of the second rupturing plate 107 and the closing operation of the test check valve 103 are performed within a very short time as the discharge valve 108 is opened.

위에서 기술한 역류시험 순서대로 시험을 진행할 때 시험장치 구성 요소별 압력, 차압은 표 1과 같다.Table 1 shows the pressure and differential pressure of each component of the test apparatus when the test is carried out in accordance with the flow test described above.

시험압력이 100㎏/㎠인 체크밸브 역류시험시 시험방법Test method for check valve backflow test with test pressure of 100㎏ / ㎠

명칭

designation
체크밸브
상류측
배관
(102)
Check valve
Upstream side
pipe
(102)
시험용
체크밸브
(103)
Experimental
Check valve
(103)
체크밸브
하류측
배관
(104)
Check valve
Downstream side
pipe
(104)
제1파열판
(105)
The first rupture plate
(105)
압력조절관
(106)
Pressure regulating tube
(106)
제2파열판
(107)
Second rupture disc
(107)
대기
Waiting
파열판
파열압력
(㎏/㎠)
Rupture plate
Rupture pressure
(Kg / cm2)

60

60

60

60
가압상태의 압력
(㎏/㎠)
The pressure in the pressurized state
(Kg / cm2)

100

100

100

100

100

100

50(차압)

50 (differential pressure)



50(차압)

50 (differential pressure)

0

0
역류시험시 동작순서
Operation sequence in reverse flow test
2
(닫힘)
2
(Closed)
1
(파열)
One
(rupture)
3
(파열)
3
(rupture)
체크밸브 닫힘 후 압력
(㎏/㎠)
Pressure after closing check valve
(Kg / cm2)

100

100

100

100

0

0

0

0

0

0

체크밸브 전후단 압력, 밸브개도, 닫김 시간을 측정한다.Check the upstream and downstream pressure, valve opening and closing time of the check valve.

체크밸브 누설량을 측정한다.Check valve leakage is measured.

한편, 도 5는 본 발명에 따른 체크밸브 역류시험장치의 역류시험에서 취득한 체크밸브 디스크 닫힘 시간과 이동거리를 도시한 그래프이고, 도 6은 본 발명에 따른 체크밸브 역류시험장치의 역류시험에서 취득한 체크밸브 디스크 닫힘 시간과 압력변동을 도시한 그래프이다.FIG. 5 is a graph showing the check valve disc closing time and moving distance obtained in the backflow test of the check valve backflow testing apparatus according to the present invention. FIG. A graph showing the check valve disc closing time and pressure fluctuation.

상기한 바와 같은 단계로 이루어진 본 발명에 따른 체크밸브 역류시험방법은 체크밸브 역류시험을 수행할 때, 시험조건(압력, 유량)을 정확히 구현함으로써, 정밀한 체크밸브 역류시험이 이루어진다.The check valve backflow test method according to the present invention having the steps described above accurately performs the check valve backflow test by accurately executing the test conditions (pressure, flow rate) when performing the check valve backflow test.

구체적으로 방출밸브(108)를 사용할 때 발생되는 문제점(밸브 개방에 많은 힘이 들어 밸브 개방 시간이 길어짐)을 해결할 수 있으며, 방출밸브(108)로 파열판 1개를 사용할 때 발생되는 문제점(파열판의 파열압력 오차로 인한 정확한 역류시험 압력을 달성하기 어려움)을 해소할 수 있다.In particular, it is possible to solve the problem (problem of opening the valve due to a lot of force to open the valve) caused when the discharge valve 108 is used, and to solve the problem that occurs when using one rupture plate with the discharge valve 108 It is difficult to achieve an accurate backflow test pressure due to the burst pressure error).

부수적으로 체크밸브 시험압력보다 낮은 파열압력의 파열판을 사용함으로써, 파열판 구입비(파열압력이 증가될 수록 파열판 단가가 높아짐)를 절감할 수 있으며, 체크밸브 역류시험에 필요한 압력별로 파열판을 구비해야 하는 문제를 상당부분 해소할 수 있는 작용효과가 있다. Incidentally, the use of a rupture plate with a rupture pressure lower than the check valve test pressure can reduce the cost of purchasing the rupture plate (the rupture pressure increases as the rupture pressure increases), and the rupture plate required for the pressure required for the check valve backflow test Can be largely eliminated.

100: 압력탱크 100-1: 압력계
101: 차단밸브 102: 체크밸브 상류측 배관
102-1: 압력계 103: 시험용 체크밸브
103-1: 체크밸브 디스크 103-2: 체크밸브 덮개
103-3: 디스크 매달림 줄 104: 체크밸브 하류측 배관
104-1: 압력계 104-2: 배기밸브
105: 제1파열판 106: 2차압력드럼
106-1: 배기밸브 107: 제2파열판
108: 방출밸브 200: 고압질소가스공급밸브
201: 압력제어밸브 202: 차단밸브
203: 고압질소가스공급관 203-1: 압력계
205: 압력제어밸브 300: 급수관
301: 차단밸브 302: 차단밸브
A: 체크밸브 역류시험장치 100: pressure tank 100-1: pressure gauge
101: Shut-off valve 102: Check valve upstream piping
102-1: Pressure gauge 103: Check valve for testing
103-1: Check valve disc 103-2: Check valve cover
103-3: Disk suspension line 104: Check valve downstream piping
104-1: Pressure gauge 104-2: Exhaust valve
105: first rupture plate 106: secondary pressure drum
106-1: exhaust valve 107: second rupture plate
108: discharge valve 200: high-pressure nitrogen gas supply valve
201: pressure control valve 202: shutoff valve
203: high-pressure nitrogen gas supply pipe 203-1: pressure gauge
205: pressure control valve 300: water supply pipe
301: shutoff valve 302: shutoff valve
A: Check valve backflow test system

Claims (3)

시험용 체크밸브(103)의 하류측에 체크밸브 하류측 배관(104)이 연결되고, 상기 체크밸브 하류측 배관(104)에 제1파열판(105)이 연결되며, 상기 제1파열판(105)에 2차압력드럼(106)이 연결되며, 상기 2차압력드럼(106)에 배기밸브(106-1), 제2파열판(107), 방출밸브(108), 고압질소가스공급관(203), 급수밸브(302)가 연결됨을 특징으로 하는 체크밸브 역류시험장치. A check valve downstream pipe 104 is connected to the downstream side of the test check valve 103 and a first rupture plate 105 is connected to the check valve downstream pipe 104, The second rupture plate 107, the discharge valve 108, the high-pressure nitrogen gas supply pipe 203, the water supply pipe 106, the second rupture plate 106, the second pressure drum 106, And a valve (302) is connected to the check valve. 제1항에 있어서,
상기 고압질소가스공급관(203)에 압력계(203-1)가 연결되고, 상기 압력계(203-1)에 차단밸브(202)가 연결되며, 상기 차단밸브(202)에 압력제어밸브(201)가 연결됨을 특징으로 하는 체크밸브 역류시험장치. The method according to claim 1,
A pressure gauge 203-1 is connected to the high pressure nitrogen gas supply pipe 203 and a shutoff valve 202 is connected to the pressure gauge 203-1 and a pressure control valve 201 is connected to the shutoff valve 202 Wherein the check valve backflow test apparatus is connected to the check valve backflow test apparatus. 청구항 제1항 기재의 체크밸브 역류시험장치를 이용한 체크밸브 역류시험방법으로서,
시험용 체크밸브(103), 제1, 2파열판(105, 107), 2차압력드럼(106)을 설치하는 단계(S 100);
체크밸브 상, 하류측 배관(102, 104)과 2차압력드럼(106)에 급수 차단밸브(301, 302)를 개방하여 물을 충수하는 단계(S 200);
체크밸브 상, 하류측 배관(102, 104)에 고압질소가스공급밸브(200)를 조절하여 질소를 가압하는 단계(S 300);
2차압력드럼(106)에 연결된 방출밸브(108)를 개방하는 단계(S 400);
제1, 2파열판(105, 107)이 파열됨과 동시에 외부로 유체가 방출되는 단계(S 500);
시험용 체크밸브(103)의 전후단 압력, 밸브 개도, 닫김 시간 측정단계(S 600);
시험용 체크밸브(103)의 누설량 측정단계(S 700)으로 이루어짐을 특징으로 하는 체크밸브 역류시험방법.
A check valve backflow test method using the check valve backflow test apparatus recited in claim 1,
Installing the test check valve 103, the first and second rupture plates 105 and 107, and the secondary pressure drum 106 (S 100);
Opening the water shutoff valves 301 and 302 to the check valve upstream and downstream pipes 102 and 104 and the secondary pressure drum 106 to add water (S 200);
Controlling the high-pressure nitrogen gas supply valve (200) on the check valve upstream and downstream pipes (102, 104) to pressurize nitrogen (S 300);
Opening (S 400) the discharge valve (108) connected to the secondary pressure drum (106);
A step S 500 of rupturing the first and second rupture plates 105 and 107 and discharging the fluid to the outside;
Measuring the front and rear end pressure, valve opening and closing time of the check check valve 103 (S 600);
And a leakage amount measurement step (S700) of the test check valve (103).
KR1020130039180A 2013-04-10 2013-04-10 Check valve backflow testing apparatus and method KR101390884B1 (en)

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN104266834A (en) * 2014-10-17 2015-01-07 北京航空航天大学 Comprehensive detection platform for gas valves
CN108918103A (en) * 2018-04-18 2018-11-30 合肥通用机械研究院有限公司 A kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and test method
CN109029943A (en) * 2018-06-21 2018-12-18 中广核研究院有限公司 Two loop non-return valve action test sets
KR101997405B1 (en) * 2018-10-04 2019-07-05 한전케이피에스 주식회사 Apparatus and method for preventing sealing damage of check valve on Reactor Coolant Pressure Hot Leg
KR20220045417A (en) 2020-10-05 2022-04-12 유완기 Multi-purpose leak test device for easy mass inspection
CN114383806A (en) * 2021-04-26 2022-04-22 国核工程有限公司 Calibration test method for flow resistance simulation device of high-pressure blasting valve

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KR100909443B1 (en) 2008-11-24 2009-07-30 한국수력원자력 주식회사 Test apparatus and method for safety valve
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KR100909443B1 (en) 2008-11-24 2009-07-30 한국수력원자력 주식회사 Test apparatus and method for safety valve
KR101107037B1 (en) 2010-09-30 2012-01-25 한국수력원자력 주식회사 Apparatus for end-loading test of active power operated valves

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266834A (en) * 2014-10-17 2015-01-07 北京航空航天大学 Comprehensive detection platform for gas valves
CN108918103A (en) * 2018-04-18 2018-11-30 合肥通用机械研究院有限公司 A kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and test method
CN109029943A (en) * 2018-06-21 2018-12-18 中广核研究院有限公司 Two loop non-return valve action test sets
KR101997405B1 (en) * 2018-10-04 2019-07-05 한전케이피에스 주식회사 Apparatus and method for preventing sealing damage of check valve on Reactor Coolant Pressure Hot Leg
KR20220045417A (en) 2020-10-05 2022-04-12 유완기 Multi-purpose leak test device for easy mass inspection
CN114383806A (en) * 2021-04-26 2022-04-22 国核工程有限公司 Calibration test method for flow resistance simulation device of high-pressure blasting valve
CN114383806B (en) * 2021-04-26 2023-10-31 上海核工程研究设计院股份有限公司 Calibration test method for flow resistance simulation device of high-pressure explosion valve

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