KR950009760Y1 - System to prevent leakage hydragen gas for generator cooling - Google Patents

System to prevent leakage hydragen gas for generator cooling Download PDF

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Publication number
KR950009760Y1
KR950009760Y1 KR92026526U KR920026526U KR950009760Y1 KR 950009760 Y1 KR950009760 Y1 KR 950009760Y1 KR 92026526 U KR92026526 U KR 92026526U KR 920026526 U KR920026526 U KR 920026526U KR 950009760 Y1 KR950009760 Y1 KR 950009760Y1
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South Korea
Prior art keywords
supply pipe
nitrogen gas
generator
hydrogen gas
hydrogen
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KR92026526U
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Korean (ko)
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KR940018071U (en
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서연진
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박득표
포항종합제철주식회사
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/10Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing

Abstract

내용 없음.No content.

Description

발전기 냉각용 수소가스누출방지장치Hydrogen gas leak prevention device for generator cooling

제1도는 본 고안에 따른 수소가스 누출방지장치의 발전기 냉각계통도1 is a generator cooling system diagram of the hydrogen gas leakage preventing device according to the present invention

제2도는 제 1 도에 도시된 본 고안의 수소가스누출방지장치 상세도2 is a detailed view of the hydrogen gas leakage prevention device of the present invention shown in FIG.

제3도는 종래기술에 따른 발전기의 수소가스 냉각계통도3 is a hydrogen gas cooling system diagram of a generator according to the prior art.

제4도는 종래기술과 본 고안의 작동방법을 도시한 블럭도면으로서4 is a block diagram showing a conventional method and an operation method of the present invention.

(a)도는 본 고안에 따른 작동방식을 도시한 블럭도(a) is a block diagram showing the operation method according to the present invention

(b)도는 종래기술에 따른 작동방식을 도시한 블럭도(b) is a block diagram showing the operation method according to the prior art

제5도는 종래기술과 본 고안의 수소가스압력 특성곡선도로서5 is a characteristic curve of hydrogen gas pressure in the prior art and the present invention.

(a)도는 본 고안에 따른 그래프로(a) is a graph according to the present invention

(b)도는 종래기술에 따른 그래프도이다(b) is a graph according to the prior art.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 질소저장탱크 14 : 질소가스 주공급관10: nitrogen storage tank 14: nitrogen gas main supply pipe

20a,20b : 자동차단밸브 22a.22b : 솔레노이드 밸드(solenoid valve)20a, 20b: Automotive shut-off valve 22a.22b: Solenoid valve

25 : 제어판넬(control panel) 34 : 리미트스위치(limit switch)25: control panel 34: limit switch

42a.42b : 오리피스(orifice) 110 : 수소공급관42a.42b: orifice 110: hydrogen supply line

117 : 이산화탄소공급관 135 : 오일공급펌프117: carbon dioxide supply pipe 135: oil supply pump

본 고안은 발전기 내부의 수소가스가 대기로 누출되는 것을 방지하기 위한 장치에 관한 것으로, 보다 상세히는, 발전기의 베어링측 밀봉부에 질소 가스를 공급하여 외부누출을 방지함으로써 수소가스 폭발로 인한 대형안전사고를 예방하도록 된 발전기 냉각용 수소가스누출방지장치에 관한 것이다. 일반적으로 발전기내에는 냉각용으로 99.9%순도의 수소개스가 대략 100m3충진되어 2㎏/km2의 압력으로 운전되고 있다. 이러한, 발전기(100)는 제3도에 도시된 바와같이 내부로 수소가스를 공급하는 수소공급관(110)과 차단밸브(112)를 통해 수소가스 저장태크(115)에 연결되고, 또한 내부로 이산화탄소(CO2)가스를 공급하는 이산화탄소 공급관(117)과 차단밸브(118)를 통해 이산화탄소 저장탱크(120)에 연결되며, 상기 수소공급관(110)에는 배기관(122)과 배기밸브(124)가 연결되는 한편, 상기 발전기(100)의 양측에 위치한 로터축(Rotor Shaft) (102a)(102b)에는 오일저장탱크(130)로부터 오일(oil)이 공급된다. 상기 오일저장탱크(130)에는 오일공급관(132a)(132b)으로 각각 오일을 공급하는 오일공급펌프(135)가 정착되어 상기 로터축(102a)(102b)을 지지하는 베어링 축 밀봉부(105a)(105b)에 오일을 제공함으로써 발전기(100)내부의 수소개스가 대기로 누출되지 못하도록 하고 있다.그러나, 상기와같은 종래의 발전기(100)에서는 오일공급펌프(135)나 기타 오일공급관(132a)(132b)등이 파손되는 경우, 베이링측 밀봉부(105a)(105b)에 형성된 오일유막이 파괴되어 수소가스가 발전기(100)외부의 작업실로 누출되는 것이다. 이때 발전기 내부의 수소가스순도가 4-75%로 저하되는 경우 수소가스의 점화로 인한 폭발사고등의 큰 안전사고가 발생되는 것이다. 이러한 폭발사고를 예방하기 위해서 종래에는 제4도의 (b)도와같은 작동방법을 사용하고 있다. 즉, 여러가지 고장원인(200)으로 인하여 발전기(100)내부의 수소가스순도가 90%이하로 저하되어 경보음(미도시)이 발생되면, 작업자는 발전기(100)의 출력을 감소시킨 다음, 배기밸브(124)를 열어서 외부로 배출시키게 되어 작업실내로의 수소가스 누출을 방지하는 것이다. 그러나, 발전기(100)의 로터축(102a)(102b)은 대략 3.600rpm으로 회전하기 때문에 발전기(100)의 정지시까지는 1.5시간이 소요되고, 계속적으로 상기 베어링축 밀봉부(105a)(105b)를 통해서 수소가스가 작업실로 누출되기 때문에 안전사고의 위험성은 항상 존재하는 것이었다. 본 고안은 상기와 같은 종래의 문제점을 해소하기 위하여 안출된것으로서, 발전기 내부의 수소가스순도가 저하되는 경우, 베어링축 밀봉부에서 수소가스가 누출되지 않도록 함으로서 대형안전사고를 예방하도록 된 수소가스 누출방지장치를 제공함에 그 목적이 있다.The present invention relates to a device for preventing the leakage of hydrogen gas inside the generator to the atmosphere, and more particularly, by supplying nitrogen gas to the bearing side seal of the generator to prevent external leakage, large safety due to hydrogen gas explosion The present invention relates to a generator for preventing hydrogen gas leakage for cooling a generator. In general, an alternator for the cooling may be introduced in 99.9% purity Suga filled approximately 100m 3 is operating at a pressure of 2㎏ / km 2. The generator 100 is connected to the hydrogen gas storage tag 115 through a hydrogen supply pipe 110 and a shutoff valve 112 for supplying hydrogen gas therein, as shown in FIG. (CO 2 ) is connected to the carbon dioxide storage tank 120 through the carbon dioxide supply pipe 117 and the shutoff valve 118 for supplying gas, the exhaust pipe 122 and the exhaust valve 124 is connected to the hydrogen supply pipe 110 Meanwhile, oil is supplied from the oil storage tank 130 to the rotor shafts 102a and 102b located at both sides of the generator 100. An oil supply pump 135 for supplying oil to the oil supply pipes 132a and 132b is fixed to the oil storage tank 130 to support the bearing shaft seal 105a for supporting the rotor shafts 102a and 102b. The oil is provided to the 105b to prevent the leakage of the water inside the generator 100 into the atmosphere. However, in the conventional generator 100 as described above, the oil supply pump 135 or the other oil supply pipe 132a. When 132b and the like are broken, the oil oil film formed on the bearing side sealing portions 105a and 105b is broken and hydrogen gas leaks into the work chamber outside the generator 100. At this time, when the purity of hydrogen gas inside the generator is reduced to 4-75%, a large safety accident such as an explosion due to ignition of hydrogen gas occurs. In order to prevent such an explosion accident, a conventional operation method as shown in FIG. 4 (b) is used. That is, when the purity of hydrogen gas inside the generator 100 is lowered to 90% or less due to various failure causes 200, and an alarm sound (not shown) is generated, the operator reduces the output of the generator 100, and then exhausts the gas. The valve 124 is opened to be discharged to the outside to prevent the leakage of hydrogen gas into the working room. However, since the rotor shafts 102a and 102b of the generator 100 rotate at approximately 3.600 rpm, it takes 1.5 hours to stop the generator 100, and continuously the bearing shaft seals 105a and 105b. The risk of safety accidents was always present because of the release of hydrogen gas into the work room. The present invention was devised to solve the conventional problems as described above. When the purity of hydrogen gas inside the generator is reduced, the hydrogen gas leak is prevented by preventing hydrogen gas from leaking from the bearing shaft seal. The object is to provide a prevention device.

상기목적을 달성하기 위하여 본 고안은, 질소저장탱크로부터 질소가스 주공급관이 인출되고, 상기 질소가스주공급관은 질소가스공급관으로 각각 분지되며, 상기 질소가스주공급관과 수소공급관에는 각각 솔레노이드 밸브에 의해 작동되는 자동차단밸브가 갖춰지고, 상기 수소공급관의 자동차단밸브에는 상기 질소 가스주공급관의 자동차단밸브로 전기적 신호를 공급하는 리미트스위치가 갖춰지는 한편, 상기 베어링축 밀봉부의 전단에는 질소가스 공급관에 각각 오리피스(orifice)가 장착되는 수소가스 누출방지장치를 마련함에 의한다.In order to achieve the above object of the present invention, a nitrogen gas main supply pipe is drawn out from a nitrogen storage tank, and the nitrogen gas main supply pipe is branched into a nitrogen gas supply pipe, respectively, and the nitrogen gas main supply pipe and a hydrogen supply pipe are respectively provided by a solenoid valve. An actuated shut-off valve is provided, and the shut-off valve of the hydrogen supply pipe is provided with a limit switch for supplying an electrical signal to the shut-off valve of the nitrogen gas main supply pipe, while the front end of the bearing shaft seal is provided with a nitrogen gas supply pipe. By providing a hydrogen gas leak prevention device is mounted each orifice (orifice).

이하, 본 고안을 도면에 따라 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the drawings.

본 고안의 수소가스누출방지장치(1)는 제1도 및 제2도에 도시된 바와같이 질소저장탱크(10)로부터 발전기(100)의 베어링측 밀봉부(105a)(105b)를 향해 질소가스 주공급관(14)이 인출되고, 상기 질소가스주공급관(14)은 질소가스공급관(16a)(16b)으로 나누어져서 상기 베어링측 밀봉부(105a)(105b)에 연결된다. 그리고,상기 질소가스 주공급관(14)과 수소공급관(110)에는 각각 자동차단밸브(20a)(20b)가 갖춰지고, 상기 자동차단밸브(20a)(20b)는 각각 제어판넬(25)로부터 공급되는 전기적 신호에 따라 개폐작동이 이루어진다. 상기 자동차단밸브(20a)(20b)는 각각 일반적으로 솔레노이드밸브(22a)(22b)를 이용하는 공지의 장치로서, 이는 상기제어판넬(25)에서 전기적 신호를 전송하여 솔레노이드밸브(22a)(22b)를 개폐시키면, 상기 자동차단밸브(20a)(20b)로 연결되는 질소작동관(32a)(32b)으로 질소가스가 공급되어 가동자(미도시)를 상,하로 작동시킴으로서 자동차단밸브(20a)(20b)의 개폐작동이 이루어지게 된다. 또한, 상기 수소공급관(110)의 자동차단밸브(20b)에는 리미트스위치(34)가 장착되고, 상기 제어판넬(25)을 통해 질소가스 주공급관(14)의 자동차단밸브(20a)로 전기적 신호를 제공하게 되는 바, 이는 수소공급관(110)의 자동차단밸브(20b)가 닫혀짐으로서 밸브스핀들(미도시)이 하강하는 경우, 리미트스위치(34)와 접촉되어 전기적 신호를 제어판넬(25)로 제공하게 되고,이러한 신호에 따라 제어판넬(25)은 질소가스 주공급관(14)의 자동차단밸브(20a)를 개방시키도록 전기적 신호를 제공하는 것이다. 한편, 상기 질소 가스공급관(16a)(16b)에는 각각 베어링측 밀봉부(105a)(105b)의 전방에서 오리피스(orifice)(42a)(42b)가 장착된 구성으로 갖추고 있다.미설명부호(c)는 전기도선이다.Hydrogen gas leakage preventing device 1 of the present invention is nitrogen gas from the nitrogen storage tank 10 toward the bearing side seals 105a and 105b of the generator 100, as shown in FIGS. 1 and 2. The main supply pipe 14 is drawn out, and the nitrogen gas main supply pipe 14 is divided into nitrogen gas supply pipes 16a and 16b and connected to the bearing side seals 105a and 105b. In addition, the nitrogen gas main supply pipe 14 and the hydrogen supply pipe 110 are provided with shutoff valves 20a and 20b, respectively, and the shutoff valves 20a and 20b are supplied from the control panel 25, respectively. The opening and closing operation is performed according to the electrical signal. The shut-off valves 20a and 20b are known devices that generally use solenoid valves 22a and 22b, which transmit electrical signals from the control panel 25 to provide solenoid valves 22a and 22b. When opening and closing the nitrogen gas is supplied to the nitrogen operating pipes (32a, 32b) connected to the auto shut off valves (20a, 20b) to operate the actuator (not shown) up and down by the auto shutoff valve (20a) The opening and closing operation of 20b is made. In addition, a limit switch 34 is mounted on the shutoff valve 20b of the hydrogen supply pipe 110, and an electrical signal is transmitted to the shutoff valve 20a of the nitrogen gas main supply pipe 14 through the control panel 25. When the valve spindle (not shown) is lowered because the shut-off valve 20b of the hydrogen supply pipe 110 is closed, it is in contact with the limit switch 34 to transmit an electrical signal to the control panel 25. In accordance with the signal, the control panel 25 is to provide an electrical signal to open the shut-off valve (20a) of the nitrogen gas main supply pipe (14). On the other hand, the nitrogen gas supply pipes 16a and 16b are each provided with a configuration in which orifices 42a and 42b are mounted in front of the bearing side sealing portions 105a and 105b. ) Is the electric conductor.

상기와같이 구성된 본 고안을 제4도의 (a)도를 참조하여 작동순서를 보다 상세히 설명한다.The present invention configured as described above will be described in more detail with reference to FIG. 4 (a).

여러가지 고장원인(200)으로 인하여 발전기(100) 내부의 수소가스순도가 90%이하로 감소되며 작업실에서 종래와 같이 경보음이 발생되고, 작업자는 단계(210)에서와 같이 상황을 판단하고, 다음단계(220)에서 베어링측 밀봉부(105a)(105b)에 각각 질소가스를 공급하여야 한다고 판단한다.Due to various failure causes 200, the purity of hydrogen gas inside the generator 100 is reduced to 90% or less, and an alarm sound is generated in the work room as in the prior art, and the operator judges the situation as in step 210, and then In step 220, it is determined that nitrogen gas must be supplied to the bearing side sealing portions 105a and 105b, respectively.

그리고, 제어판넬(25)의 스위치(미도시)를 다음단계(230)에서 온(ON)시키면, 단계(240)에서 수소공급관(110)의 자동차단밸브(20b)에 갖춰진 솔레노이드 밸브(22b)가 작동되어 밸브스핀들(Valve spindle)(미도시)이 하강하면서 리미트스위치(34)에 접촉되고, 이와 동시에 제어판넬(25)은 단계(250)에서와 같이 상기 리미트스위치(34)의 전기신호에 따라 질소가스 주공급관(14)의 자동차단밸브(20a)에 갖춰진 솔레노이드 밸브(22a)를 작동시킨다. 따라서, 단계(260)에서 수소공급관(110)의 자동차단밸브(20b)는 닫히고, 단계(270)에서 질소가스 주공급관(14)의 자동차단밸브(20a)는 열림으로서, 질소가스공급관(16a)(16b)으로 질소가스가 공급되고,오리피스(42a)(42b)를 통과하면서 일정압력이 유지되어 단계(290)에서 베어링축 밀봉부(105a)(105b)에 각각 2.5kg/cm2의 질소가스가 공급된다. 따라서 종래에서와 같이 베어링축 밀봉부(105a)(105b)를 통한 수소가스의 외부누출이 차단되는 바, 이는 수소가스의 내부압력이 2kg/cm2으로 유지되어 작동되기 때문에 2.5kg/cm2의 질소가스가 외부에서 베어링 축밀봉부(105a)(105b)를 통해 공급되면 압력차에 의해 누출이 차단되는 것이다. 그리고, 다음단계(32b)에서 배기밸브(124)를 통해 외부로 수소가스를 배기시키고, 다음단계(330)에서 이산화탄소공급관(117)의 차단밸브(118)를 개방시켜 발전기(100)내부를 이산화탄소(CO2)로 차단시키는 것이다. 따라서, 본 고안에 의하면 베어링 축 밀봉부(105a)(l05b)를 통한 수소가스의 외부누출이 효과적으로 차단되어 대형 안전사고가 예방되는 효과가 얻어진다.When the switch (not shown) of the control panel 25 is turned on in the next step 230, the solenoid valve 22b provided in the auto shut-off valve 20b of the hydrogen supply pipe 110 in step 240. Is activated so that the valve spindle (not shown) touches the limit switch 34 as it descends, and at the same time the control panel 25 acts on the electrical signal of the limit switch 34 as in step 250. Accordingly, the solenoid valve 22a provided in the auto shut off valve 20a of the nitrogen gas main supply pipe 14 is operated. Therefore, the shutoff valve 20b of the hydrogen supply pipe 110 is closed in step 260, and the shutoff valve 20a of the nitrogen gas main supply pipe 14 is opened in step 270, so that the nitrogen gas supply pipe 16a is opened. Nitrogen gas is supplied to the (16b), a constant pressure is maintained while passing through the orifices (42a) (42b) to the bearing shaft seals (105a) (105b) of 2.5kg / cm 2 respectively in step 290 Gas is supplied. Therefore, the external leakage of hydrogen gas through the bearing shaft seals 105a and 105b is blocked as in the prior art, which is 2.5kg / cm 2 because the internal pressure of the hydrogen gas is maintained at 2kg / cm 2 . When nitrogen gas is supplied through the bearing shaft sealing parts 105a and 105b from the outside, leakage is blocked by the pressure difference. Then, the hydrogen gas is exhausted to the outside through the exhaust valve 124 in the next step 32b, and the shutoff valve 118 of the carbon dioxide supply pipe 117 is opened in the next step 330 to produce carbon dioxide inside the generator 100. To (CO 2 ). Therefore, according to the present invention, the external leakage of hydrogen gas through the bearing shaft seals 105a and l05b is effectively blocked, so that a large safety accident can be prevented.

한편, 제 5 도에는 본 고안에 의해서 상기 베어링 축 밀봉부(105a)(105b)를 통한 수소가스의 배출이 차단되는 상태를 그래프로 도시한 것이다. 제5의 (b)도에 도시된 바와같이 시간이 지남에 따라 본 고안에서는 발전기(100)내부의 수소가스순도가 급격히 하락하지 않고, 작업실 내부의 수소가스 순도도 증가하지 않았지만, 종래기술에서는 제5도의 (b)도에 도시된 바와 같이 발전기(100)내부의 수소가스 순도가 급격히 하락하면서, 작업실 내부의 수소가스 순도도 급격히 증가되었다. 따라서 본 고안에 의하면, 수소가스 폭발등의 대형사고가 효과적으로 예방되는 실용상의 효과를 얻게 되는 것이다.On the other hand, Figure 5 shows a state in which the discharge of the hydrogen gas through the bearing shaft seal portion 105a, 105b is blocked by the present invention in a graph. As shown in FIG. 5 (b), as time goes by, the purity of hydrogen gas inside the generator 100 does not drop rapidly and the purity of hydrogen gas inside the working room does not increase. As shown in (b) of FIG. 5, the purity of hydrogen gas in the generator 100 is drastically reduced, and the purity of hydrogen gas in the workroom is also rapidly increased. Therefore, according to the present invention, a practical effect of effectively preventing a large accident such as hydrogen gas explosion is obtained.

Claims (1)

질소저장탱크(10)로부터 질소가스 주공급관(14)이 인출되고, 상기 질소가스 주공급관(14)은 질소가스공급관(16a)(16b)으로 각각 분지되며, 상기 질소가스주공급관(14)과 수소공급관(110)에는 각각 솔레노이드밸브(22a)(22b)에 의해 작동되는 자동차단밸브(20a)(20b)가 갖춰지고, 상기수소공급관(110)의 자동차단밸브(20b)에는 상기 질소가스주공급관(14)의 자동차단밸브(20a)로 전기적 신호를 공급하는 리미트스위치(34)가 갖춰지는 한편, 상기 베어링축 밀봉부(105a)(105b)의 전단에는 질소가스공급관(16a)(16b)에 각각 오리피스(orifice)(42a)(42b)가 장착됨을 특징으로 하는 발전기 냉각용 수소가스누출방지장치.The nitrogen gas main supply pipe 14 is drawn out from the nitrogen storage tank 10, and the nitrogen gas main supply pipe 14 is branched into the nitrogen gas supply pipes 16a and 16b, respectively, and the nitrogen gas main supply pipe 14 and The hydrogen supply pipe 110 is provided with shutoff valves 20a and 20b operated by solenoid valves 22a and 22b, respectively, and the nitrogen gas main is provided to the shutoff valve 20b of the hydrogen supply pipe 110. A limit switch 34 for supplying an electrical signal to the shut-off valve 20a of the supply pipe 14 is provided, while the front end of the bearing shaft seals 105a and 105b is provided with nitrogen gas supply pipes 16a and 16b. Hydrogen gas leakage preventing device for cooling the generator, characterized in that each orifice (orifice) (42a, 42b) is mounted on.
KR92026526U 1992-12-26 1992-12-26 System to prevent leakage hydragen gas for generator cooling KR950009760Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100905651B1 (en) * 2002-12-28 2009-06-30 주식회사 포스코 An Apparatus for Maintaining the Purity of H2 Gas for Cooling of an Electric Generator

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Publication number Priority date Publication date Assignee Title
CN110048143B (en) * 2018-01-16 2024-03-01 武汉众宇动力系统科技有限公司 Hydrogen supply device for hydrogen fuel cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100905651B1 (en) * 2002-12-28 2009-06-30 주식회사 포스코 An Apparatus for Maintaining the Purity of H2 Gas for Cooling of an Electric Generator

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