KR101251247B1 - Temperature sensor system for Cargo Tank of Mark Ⅲ LNG Carrier - Google Patents

Temperature sensor system for Cargo Tank of Mark Ⅲ LNG Carrier Download PDF

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KR101251247B1
KR101251247B1 KR1020070011087A KR20070011087A KR101251247B1 KR 101251247 B1 KR101251247 B1 KR 101251247B1 KR 1020070011087 A KR1020070011087 A KR 1020070011087A KR 20070011087 A KR20070011087 A KR 20070011087A KR 101251247 B1 KR101251247 B1 KR 101251247B1
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South Korea
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barrier
temperature
lng
temperature sensor
lng tank
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KR1020070011087A
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Korean (ko)
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KR20080072387A (en
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우한영
박성근
이용훈
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현대중공업 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

본 발명은 LNG 탱크 온도감지장치에 관한 것으로, 그 목적은 멤브레인 금속패널의 코러게이션을 이용한 신호선의 배치없이 제2 방벽의 외측에만 온도센서를 설치하여 구조를 단순화함과 더불어 보다 안정된 온도제어시스템의 구축이 가능한 LNG 탱크 온도감지장치를 제공함에 있다. 이를 위한 본 발명은 멤브레인 금속패널을 구비하는 제1 방벽의 외측에 제1 단열층과 제2 방벽 및 제2 단열층을 구비하는 이중 방벽 구조를 갖는 LNG 탱크의 온도감지장치에 있어서, 상기 제2 방벽의 외측에 설치되며, 제2 방벽을 통해 LNG 탱크 내부의 온도변화를 감지하여 탱크내의 LNG 화물 적재여부 및 제1,2 방벽을 통한 LNG의 누설을 감지하는 다수개의 제1 온도센서들; 및 상기 제2 방벽의 외측에서 상기 LNG 탱크에 설치되는 펌프타워 서포트에 근접하게 설치되어 금속성의 펌프타워 서포트를 통해 LNG 탱크 내의 온도변화를 감지하는 적어도 하나 이상의 제2 온도센서;를 구비하는 LNG 탱크 온도감지장치에 관한 것을 그 기술적 요지로 한다.The present invention relates to an LNG tank temperature sensing device, and an object thereof is to install a temperature sensor only on the outside of the second barrier without arranging a signal line using the corrugation of the membrane metal panel, thereby simplifying the structure and providing a more stable temperature control system. The present invention provides an LNG tank temperature sensing device that can be constructed. The present invention for this purpose in the temperature sensing device of the LNG tank having a double barrier structure having a first heat insulating layer, a second barrier and a second heat insulating layer on the outside of the first barrier having a membrane metal panel, the second barrier A plurality of first temperature sensors installed on the outside and sensing the temperature change in the LNG tank through the second barrier to detect whether LNG is loaded in the tank and the leakage of LNG through the first and second barriers; And at least one second temperature sensor installed close to the pump tower support installed in the LNG tank outside the second barrier to sense a temperature change in the LNG tank through a metallic pump tower support. The technical gist of the temperature sensing device is considered.

온도감지, LNG 탱크, 제1 온도센서, 제2 온도센서 Temperature detection, LNG tank, first temperature sensor, second temperature sensor

Description

ＬＮＧ 탱크 온도감지장치{Temperature sensor system for Cargo Tank of Mark Ⅲ LNG Carrier}Temperature sensor system for tanks {Temperature sensor system for Cargo Tank of Mark Ⅲ LNG Carrier}

도 1 은 종래 LNG 저장탱크에 온도센서가 설치된 상태를 나타낸 사시도,
도 2 는 제1 방벽의 외측에 온도센서가 설치된 상태를 나타낸 단면도,1 is a perspective view showing a state in which a temperature sensor is installed in a conventional LNG storage tank,
2 is a cross-sectional view showing a state in which a temperature sensor is installed outside the first barrier;

도 3 은 코러게이션을 통해 신호선이 배치된 상태를 나타낸 단면도,3 is a cross-sectional view showing a state in which signal lines are arranged through corrugation;

도 4 은 본 발명의 바람직한 실시 예에 따른 온도감지장치가 LNG 탱크에 설치된 상태를 나타낸 사시도,4 is a perspective view showing a state in which a temperature sensing device according to an embodiment of the present invention is installed in an LNG tank;

도 5 는 본 발명의 제1 온도센서가 설치된 상태를 나타낸 단면도, 5 is a cross-sectional view showing a state in which the first temperature sensor of the present invention is installed;

도 6 은 본 발명의 제2 온도센서가 설치된 상태를 나타낸 단면도. 6 is a cross-sectional view showing a state in which the second temperature sensor of the present invention is installed.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(10) : 제1 방벽 (20) : 제1 단열층10: first barrier 20: first heat insulating layer

(30) : 제2 방벽 (40) : 제2 단열층30: second barrier 40: second heat insulating layer

(50) : 선각 (60) : 펌프타워(50): Hull angle (60): Pump tower

(70) : 펌프타워 서포트 (100) : LNG 탱크70: pump tower support 100: LNG tank

(110) : 제1 온도센서 (120) : 제2 온도센서110: first temperature sensor 120: second temperature sensor

본 발명은 온도감지장치에 관한 것으로, 특히 LNG운반선의 LNG 탱크 내부 온도를 측정하는 LNG 탱크 온도감지장치에 관한 것이다.The present invention relates to a temperature sensing device, and more particularly to an LNG tank temperature sensing device for measuring the temperature inside the LNG tank of the LNG carrier.

현재, 원유 가격의 급격한 상승 및 청정에너지에 대한 수요의 급격한 증가로 액화천연가스 (Liquefied Natural Gas 이하 LNG라 함.)의 수요가 전 세계적으로 증가하고 있는 추세이다.At present, demand for liquefied natural gas (Liquefied Natural Gas or LNG) is increasing worldwide due to a sharp rise in crude oil prices and a sharp increase in demand for clean energy.

상기 LNG는 다양한 종류의 운송 수단을 이용하게 되는데, 크게 파이프라인을 이용하는 방법과 LNG운반선을 이용하는 방법이 이용되고 있다.The LNG is to use a variety of transport means, largely using a pipeline and a method using an LNG carrier.

상기 LNG운반선은 고압용기 내에 LNG를 저장 운반하도록 설계되는데, 상기 고압용기는 작은 균열에도 폭발의 위험을 갖는 것으로서, 자칫 대형참사로 커다란 경제 손실로 이어질 수 있는 만큼 그 특성상, 철저한 안전장치의 확보가 요구되고 있다.The LNG carrier is designed to store and transport LNG in a high pressure vessel, and the high pressure vessel has a risk of explosion even in a small crack, and as a result, it is possible to secure a thorough safety device due to its characteristics, which can lead to a large economic loss. It is required.

이때, 상기 LNG는 초저온 상태로 저장 보관되어야 하는데, 이를 위한 LNG의 보온유지 및 온도 분포의 실시간 분석이 매우 중요하다.At this time, the LNG is to be stored and stored in an ultra-low temperature state, it is very important for the real-time analysis of the maintenance and temperature distribution of LNG for this purpose.

따라서, LNG운반선의 LNG 탱크에는 온도를 측정하기 위한 온도감지장치가 구비되어 있으며, 이때 온도감지장치로는 많은 수의 온도센서들이 사용되고 있다.Therefore, the LNG tank of the LNG carrier is provided with a temperature sensing device for measuring the temperature, wherein a large number of temperature sensors are used as the temperature sensing device.

한편 LNG 저장탱크의 벽구조는 이중 방벽 구조로서, LNG가 직접적으로 접촉하는 제1 방벽인 멤브레인 금속패널이 내측에 구비되고, 그 외측으로 제1 플라이드 와, 제1 단열층과, 제2 방벽과, 제2 단열층이 순차적으로 배치된 구조로 되어 있다. 이와 같은 이중 방벽 구조를 갖는 LNG 저장탱크에서 온도센서는 제1 방벽의 외측 및 제2 방벽의 내측에 위치하도록 설치된다.On the other hand, the wall structure of the LNG storage tank is a double barrier structure, and the membrane metal panel, which is the first barrier to which LNG directly contacts, is provided on the inside thereof, and the first fly, the first heat insulating layer, the second barrier, 2 heat insulation layers are arrange | positioned sequentially. In the LNG storage tank having a double barrier structure as described above, the temperature sensor is installed to be located outside the first barrier and inside the second barrier.

한편 제1 방벽의 외측에 설치되는 온도센서는 LNG 탱크의 바닥쪽에 위치하도록 설치되어 주로 LNG 탱크 내부에 남겨진 LNG의 저장량의 검출 및 제1 방벽의 손상에 의한 LNG의 누출을 감지하는 기능을 제공하게 된다.On the other hand, the temperature sensor installed on the outside of the first barrier is installed to be located at the bottom of the LNG tank to provide a function of detecting the amount of storage of LNG left inside the LNG tank and detecting the leakage of LNG due to damage of the first barrier. do.

도 1은 종래 LNG 저장탱크에 온도센서가 설치된 상태를 나타낸 사시도를 도시하고 있고, 도 2는 제1 방벽의 내측에 온도센서가 설치된 상태를 나타낸 단면도를 도시하고 있으며, 도 3은 코러게이션을 통해 신호선이 배치된 상태를 나타낸 단면도를 도시하고 있다. 도 1 내지 도 3을 참조하면, 상기와 같이 제1 방벽(10)의 외측에 설치되는 온도센서(S1)의 경우, 미도시된 제어부와의 신호전송을 위한 신호선(L)의 배치에 있어서, 제1 방벽 또는 제2 방벽의 손상없이 제어부로 연결될 수 있도록 하기 위해 제1 방벽(10)인 멤브레인 금속패널의 코러게이션(11)에 의해 형성되는 공간을 통해 배선되고 있다. 도면 중 미설명 부호 S2는 제2 방벽의 외측에 설치된 온도센서이다.1 is a perspective view illustrating a state in which a temperature sensor is installed in a conventional LNG storage tank, and FIG. 2 is a cross-sectional view illustrating a state in which a temperature sensor is installed inside the first barrier, and FIG. 3 shows a corrugation. The cross section which shows the state in which a signal line is arrange | positioned is shown. 1 to 3, in the case of the temperature sensor S1 installed on the outside of the first barrier 10 as described above, in the arrangement of the signal line L for signal transmission with the control unit, not shown, In order to be connected to the control unit without damaging the first barrier or the second barrier, the wiring is routed through a space formed by the corrugation 11 of the membrane metal panel as the first barrier 10. In the figure, reference numeral S2 denotes a temperature sensor provided outside the second barrier.

그러나 상기와 같이 코러게이션을 통해 신호선이 배치된 경우, 탱크 내부 압력에 의해 코러케이션이 변형되면, 신호선에 직접적인 손상이 유발되어 온도센서로부터 정확한 신호를 전달받지 못하여 안정된 제어가 어려우며, 또한 유지 보수에 있어서도 많은 어려움이 따르는 문제점이 있었다.However, when the signal line is arranged through the corrugation as described above, if the coration is deformed by the internal pressure of the tank, direct damage is caused to the signal line, so that it is difficult to control accurately because it does not receive an accurate signal from the temperature sensor, There was a problem with many difficulties.

본 발명은 상기와 같은 문제점을 고려하여 이루어진 것으로, 본 발명의 목적 은 멤브레인 금속패널의 코러게이션을 이용한 신호선의 배치없이 제2 방벽의 외측에만 온도센서를 설치하여 구조를 단순화함과 더불어 보다 안정된 온도제어시스템의 구축이 가능한 LNG 탱크 온도감지장치를 제공함에 있다.The present invention has been made in view of the above problems, and an object of the present invention is to simplify the structure by installing a temperature sensor only on the outside of the second barrier without arranging signal lines using the corrugation of the membrane metal panel, and at a more stable temperature. The present invention provides an LNG tank temperature sensing device capable of constructing a control system.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은 코러게이션을 갖는 멤브레인 금속패널을 구비하는 제1 방벽의 외측에 제1 단열층과 제2 방벽 및 제2 단열층을 구비하는 이중 방벽 구조를 갖는 LNG 탱크의 온도감지장치에 있어서,The present invention to achieve the object as described above and to solve the conventional drawbacks is to provide a first heat insulating layer, a second barrier and a second heat insulating layer on the outside of the first barrier having a membrane metal panel having a corrugation. In the temperature sensing device of the LNG tank having a double barrier structure provided,

상기 제2 방벽의 외측에 설치되며, 제2 방벽을 통해 LNG 탱크 내부의 온도변화를 감지하여 탱크내의 LNG 화물 적재여부 및 제1,2 방벽을 통한 LNG의 누설을 감지하는 다수개의 제1 온도센서들; 및A plurality of first temperature sensors installed on the outside of the second barrier and detecting the temperature change in the LNG tank through the second barrier to detect whether LNG cargo is loaded in the tank and the leakage of LNG through the first and second barriers. field; And

상기 제2 방벽의 외측에서 상기 LNG 탱크에 설치되는 펌프타워 서포트에 근접하게 설치되어 금속성의 펌프타워 서포트를 통해 LNG 탱크 내의 온도변화를 감지하는 적어도 하나 이상의 제2 온도센서;를 구비하는 LNG 탱크 온도감지장치를 특징으로 한다.LNG tank temperature provided with at least one second temperature sensor installed near the pump tower support installed in the LNG tank outside the second barrier to sense a temperature change in the LNG tank through a metallic pump tower support. It features a sensing device.

이하, 본 발명의 바람직한 실시 예를 첨부된 도면과 연계하여 상세히 설명하면 다음과 같다. 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명은 생략한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

도 4는 본 발명의 바람직한 실시 예에 따른 온도감지장치가 LNG 탱크에 설치된 상태를 나타낸 사시도를 도시하고 있다. 도 4를 참조하면, 본 발명의 바람직한 실시 예에 따른 온도감지장치는 코러게이션을 갖는 멤브레인 금속패널과 플라이우드로 이루어지는 제1 방벽(10)의 외측에 제1 단열층(20)과 제2 방벽(30) 및 제2 단열층(40)을 구비하는 이중 방벽 구조를 갖는 LNG 탱크 내의 온도감지장치로써, 제1 온도센서(110)들과 제2 온도센서(120)로 구성되며, 제1,2 온도센서(110,120)들은 제2 방벽(30)의 외측에 설치되어 제1,2 온도센서(110,120)들과 미도시된 제어부를 연결하기 위한 신호선 및 온도센서의 설치가 용이함과 더불어 신호선의 손상에 의한 오작동을 방지할 수 있도록 구성된 것으로, 각각의 구성요소에 대해 구체적으로 설명하면 다음과 같다.4 is a perspective view showing a state in which a temperature sensing device according to a preferred embodiment of the present invention is installed in an LNG tank. Referring to FIG. 4, the temperature sensing device according to the preferred embodiment of the present invention includes a first heat insulating layer 20 and a second barrier on the outer side of the first barrier 10 formed of the membrane metal panel and the plywood having corrugation. 30) and a temperature sensing device in the LNG tank having a double barrier structure having a second heat insulating layer 40, consisting of the first temperature sensor 110 and the second temperature sensor 120, the first and second temperature The sensors 110 and 120 are installed outside the second barrier 30 to facilitate the installation of signal lines and temperature sensors for connecting the first and second temperature sensors 110 and 120 and the control unit (not shown). It is configured to prevent a malfunction, and each component is described in detail as follows.

도 5는 본 발명의 제1 온도센서가 설치된 상태를 나타낸 단면도를 도시하고 있다. 도 5를 참조하면, 상기 제1 온도센서(110)들은 제2 방벽(30)을 통해 LNG 탱크(100)내의 온도변화를 감지하여 LNG 화물 적재여부 및 제1,2 방벽(10,30)을 통한 LNG의 누설을 감지하는 것으로, 제2 방벽(30)의 외측에 위치하도록 제2 단열층(40)에 설치된다. 바람직하게는 제1 온도센서(110)들은 제2 방벽(30)에 밀착되게 설치되어 보다 민감하게 온도변화를 감지할 수 있도록 구성되며, LNG 탱크(100)의 천장과 바닥 및 측벽에 위치하도록 설치된다. 이와 같이 LNG 탱크(100)의 각 부분에 설치되는 제1 온도센서(110)들은 상호 전기적으로 연결되어 미도시된 제어부와 연결될 수도 있으며, 각각 독립적으로 제어부와 연결될 수도 있다.5 is a sectional view showing a state in which the first temperature sensor of the present invention is installed. Referring to FIG. 5, the first temperature sensors 110 detect the temperature change in the LNG tank 100 through the second barrier 30 to determine whether the LNG cargo is loaded and the first and second barriers 10 and 30. By detecting the leakage of LNG through, it is installed in the second heat insulating layer 40 to be located outside the second barrier (30). Preferably, the first temperature sensors 110 are installed to be in close contact with the second barrier 30 so as to be more sensitive to temperature changes, and are installed on the ceiling, the floor, and the sidewalls of the LNG tank 100. do. As described above, the first temperature sensors 110 installed on the respective portions of the LNG tank 100 may be electrically connected to each other, and may be connected to a controller (not shown), or may be independently connected to the controller.

한편 상기 LNG 탱크(100)의 외부로 인출되는 신호선(111)은 제2 단열층(40) 및 선각(50)을 통해 LNG 탱크(100)의 외부로 인출되어 제어부에 연결된다. 이와 같이 제1 온도센서(110)로부터 인출되는 신호선(111)은 제1,2 방벽(10,30)을 관통하거나 또는 직접적인 접촉없이 설치되므로 제1,2 방벽(10,30)의 손상유무에 상관없이 안정적으로 신호 및 전기의 전송이 가능하게 한다. Meanwhile, the signal line 111 drawn out of the LNG tank 100 is drawn out of the LNG tank 100 through the second heat insulation layer 40 and the hull 50 and connected to the controller. As such, the signal line 111 drawn out from the first temperature sensor 110 penetrates the first and second barriers 10 and 30 or is installed without direct contact, thus preventing the first and second barriers 10 and 30 from being damaged. It enables stable transmission of signals and electricity regardless.

도 6은 본 발명의 제2 온도센서가 설치된 상태를 나타낸 단면도를 도시하고 있다. 도 6을 참조하면, 상기 제2 온도센서(120)는 펌프타워(60)를 지지하기 위해 LNG 탱크(100) 바닥에 구비되는 펌프타워 서포트(70)를 통해 온도변화를 감지하는 것으로, 펌프타워 서포트(70)에 근접하게 설치된다. 통상 펌프타워 서포트(70)의 경우, 고중량물인 펌프타워(60)를 견고히 지지함과 더불어 높은 내식성을 구비토록 스테인레스 스틸로 제작되고 있다. 이처럼 금속성으로 이루어지는 펌프타워 서포트(70)의 경우, 단열층에 비해 온도변화를 민감하게 전달할 수 있으므로, 제2 온도센서(120)를 펌프타워 서포트(70)에 근접하거나 또는 밀착되게 설치하여 제1 온도센서(110)들에 비해 보다 더 신속하게 LNG의 누설을 감지할 수 있게 된다.6 is a sectional view showing a state in which the second temperature sensor of the present invention is installed. Referring to FIG. 6, the second temperature sensor 120 detects a temperature change through a pump tower support 70 provided at the bottom of the LNG tank 100 to support the pump tower 60. It is installed close to the support 70. In general, the pump tower support 70 is made of stainless steel to firmly support the pump tower 60, which is a heavy material, and to have high corrosion resistance. Thus, in the case of the pump tower support 70 made of metal, since the temperature change can be transmitted more sensitively than the heat insulation layer, the second temperature sensor 120 is installed close to or in close contact with the pump tower support 70 to provide the first temperature. It is possible to detect the leakage of LNG more quickly than the sensors 110.

상기와 같은 제2 온도센서(120)는 제1 온도센서(110)와 연결된 상태로 제어부와 연결될 수도 있으며, 펌프타워(60)의 내부를 통해 신호선을 배선하여 제어부와 연결될 수도 있다.The second temperature sensor 120 as described above may be connected to the control unit while being connected to the first temperature sensor 110, or may be connected to the control unit by wiring a signal line through the inside of the pump tower 60.

상기와 같이 구성된 본 발명의 온도감지장치의 작용에 대해 설명한다.The operation of the temperature sensing device of the present invention configured as described above will be described.

앞서 설명된 바와 같이 본 발명에 따른 제1 온도센서(110)들과 제2 온도센 서(120)는 제2 방벽(30)의 외측에 설치되어 제2 방벽(30) 또는 펌프타워 서포트(70)를 통해 LNG 탱크(100)의 온도변화를 감지하게 된다.As described above, the first temperature sensors 110 and the second temperature sensor 120 according to the present invention are installed outside the second barrier 30 to support the second barrier 30 or the pump tower support 70. The change in temperature of the LNG tank 100 is detected.

통상 LNG 탱크(100)에 LNG 화물을 적재할 경우, 운송과 저장의 편의를 위해 -162℃로 압축, 냉각, 액화시켜 부피를 1/600으로 줄인 극저온 상태로 저장하게 된다. 따라서 LNG 화물의 적재에 따라 제1 온도센서(110) 및 제2 온도센서(120)에 의해 감지되는 온도에는 차이가 있으며, 이를 감안하여 제1 온도센서(110) 및 제2 온도센서(120)에서 감지되는 온도 변화를 분석함으로써 LNG 화물의 적재여부를 검출할 수 있게 된다.In the case of loading LNG cargo in the LNG tank 100 in general, it is stored in a cryogenic state reduced in volume to 1/600 by compression, cooling, and liquefaction at -162 ℃ for convenience of transportation and storage. Therefore, there is a difference in temperature detected by the first temperature sensor 110 and the second temperature sensor 120 according to the loading of the LNG cargo, in consideration of this, the first temperature sensor 110 and the second temperature sensor 120. By analyzing the temperature change detected in the LNG cargo can be detected whether or not.

또한 제1 방벽(10) 또는 제2 방벽(30)에 손상이 발생되어 LNG가 누설될 경우에도 제1 온도센서(110) 및 제2 온도센서(120)에 감지되는 온도에는 변화가 발생되며, 이 경우 온도변화폭은 LNG 화물의 적재 여부에 따른 온도변화폭에 비해 크게 된다. 다시 말해 제1 방벽(10) 및 제2 방벽(30)의 손상으로 인해 LNG가 누설될 경우 제1,2 온도센서(110,120)에는 최대 -163℃에 근접하는 낮은 온도가 감지될 것이고, 제1 방벽(10)만의 손상으로 LNG가 누설될 경우에는 제1,2 방벽이 손상되었을 때 보다는 높은 온도가 감지될 것이며, 그 다음으로 LNG 화물이 이상없이 정상적으로 적재될 경우에는 보다 높은 정상범위의 온도가 감지될 것이다. 따라서 제1,2 온도센서(110,120)에서 감지되는 온도를 분석함으로써 LNG 화물의 적재여부나 제1,2 방벽의 손상여부를 확인할 수 있게 된다.In addition, even when damage occurs to the first barrier 10 or the second barrier 30 and the LNG leaks, a change occurs in the temperature detected by the first temperature sensor 110 and the second temperature sensor 120, In this case, the change in temperature is greater than the change in temperature depending on the loading of LNG cargo. In other words, when LNG is leaked due to damage of the first barrier 10 and the second barrier 30, the first and second temperature sensors 110 and 120 will detect a low temperature close to a maximum of -163 ° C. If LNG leaks due to damage to the barrier 10 alone, a higher temperature will be detected than when the first and second barriers are damaged. Next, if the LNG cargo is normally loaded without abnormality, a higher normal range temperature will be detected. Will be detected. Therefore, by analyzing the temperature detected by the first and second temperature sensors 110 and 120, it is possible to check whether the LNG cargo is loaded or whether the first and second barriers are damaged.

한편 제2 온도센서(120)들의 경우 금속성의 펌프타워 서포트(70)에 근접 또는 밀착되게 설치되어 제1 온도센서(110)에 비해 보다 민감하게 온도변화를 감지할 수 있는 이점을 갖게 된다.On the other hand, the second temperature sensors 120 are installed in close proximity or in close contact with the metallic pump tower support 70, and thus have an advantage of more sensitively detecting a temperature change than the first temperature sensor 110.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

본 발명은 상술한 바와 같이 제2 방벽의 외측에 제1,2 온도센서들을 설치함으로써, 종래에 비해 단순한 구조로 온도센서의 설치 및 신호선의 배치가 가능하게 되었다. 더욱이 멤브레인 금속패널의 손상에 의한 신호선의 손상을 원천적으로 방지함으로써 보다 안정된 온도감지시스템의 구현이 가능하게 되었다.According to the present invention, by installing the first and second temperature sensors on the outside of the second barrier as described above, the temperature sensor can be installed and the signal lines can be arranged in a simpler structure than in the related art. In addition, it is possible to implement a more stable temperature sensing system by preventing the damage to the signal line due to damage to the membrane metal panel.

Claims (4)

코러게이션을 갖는 멤브레인 금속패널을 구비하는 제1 방벽(10)의 외측에 제1 단열층(20)과 제2 방벽(30) 및 제2 단열층(40)을 구비하는 이중 방벽 구조를 갖는 LNG 탱크(100)의 온도감지장치에 있어서,LNG tank having a double barrier structure having a first heat insulating layer 20, a second barrier 30 and a second heat insulating layer 40 on the outside of the first barrier 10 having a corrugated membrane metal panel ( In the temperature sensing device of 100), 상기 제2 방벽(30)의 외측에 설치되며, 제2 방벽(30)을 통해 LNG 탱크(100) 내부의 온도변화를 감지하여 탱크내의 LNG 화물 적재 여부 및 제1,2 방벽을 통한 LNG의 누설을 감지하는 다수개의 제1 온도센서(110)들; 및Installed outside the second barrier 30, the second barrier 30 detects the temperature change inside the LNG tank 100, the LNG cargo loading in the tank and the leakage of LNG through the first and second barriers A plurality of first temperature sensor 110 for detecting the; And 상기 제2 방벽(30)의 외측에서 상기 LNG 탱크(100)에 설치되는 펌프타워 서포트(70)에 근접하게 설치되어 금속성의 펌프타워 서포트(70)를 통해 LNG 탱크(100) 내의 온도변화를 감지하는 적어도 하나 이상의 제2 온도센서(120);를 구비하는 것을 특징으로 하는 LNG 탱크 온도감지장치.Installed outside of the second barrier 30 to the pump tower support 70 installed in the LNG tank 100 to detect the temperature change in the LNG tank 100 through the metallic pump tower support 70 LNG tank temperature sensing apparatus comprising: at least one second temperature sensor (120). 제 1 항에 있어서,The method of claim 1, 상기 제2 온도센서(120)는 펌프타워 서포트(70)에 밀착되게 설치된 것을 특징으로 하는 LNG 탱크 온도감지장치.The second temperature sensor 120 is LNG tank temperature sensing device, characterized in that installed in close contact with the pump tower support (70). 제 1 항에 있어서,The method of claim 1, 상기 제1 온도센서(110)들은 제2 방벽(30)에 밀착되게 설치된 것을 특징으로 하는 LNG 탱크 온도감지장치.The first temperature sensor (110) LNG tank temperature sensing device, characterized in that installed in close contact with the second barrier (30). 제 1 항에 있어서,The method of claim 1, 상기 제2 온도센서(120)들은 펌프타워(60)의 내부로 배선되는 신호선과 연결되어 제어부와 연결되는 것을 특징으로 하는 LNG 탱크 온도감지장치.The second temperature sensor 120 is connected to a signal line wired into the pump tower 60, LNG tank temperature sensing device, characterized in that connected to the control unit.
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KR20160046519A (en) * 2014-10-21 2016-04-29 한국가스공사 System For Detecting A Leakage Of Liquefied Natural Gas
KR101682073B1 (en) * 2014-10-21 2016-12-02 한국가스공사 Liquefied Natural Gas Storage Tank

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