JP2018179063A - Carburetor - Google Patents

Carburetor Download PDF

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JP2018179063A
JP2018179063A JP2017076047A JP2017076047A JP2018179063A JP 2018179063 A JP2018179063 A JP 2018179063A JP 2017076047 A JP2017076047 A JP 2017076047A JP 2017076047 A JP2017076047 A JP 2017076047A JP 2018179063 A JP2018179063 A JP 2018179063A
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pipe
container
introduction pipe
liquefied gas
guide pipe
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JP6293331B1 (en
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英雄 宮崎
Hideo Miyazaki
英雄 宮崎
哲也 三浦
Tetsuya Miura
哲也 三浦
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NIPPON GAS KAIHATSU KK
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NIPPON GAS KAIHATSU KK
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Abstract

PROBLEM TO BE SOLVED: To provide a carburetor capable of suppressing damage of a welding part at an early stage.SOLUTION: A carburetor includes: a metal container 3 storing fluid for heat exchanger; a metal introduction pipe part 4 penetrating a first open hole 3a formed on the container 3 and fixed to the first open hole 3a with welding, and configured to introduce liquefied gas into the container 3; and a heat transfer pipe part 5 configured to guide the liquefied gas from the introduction pipe part 4 while vaporing the liquefied gas by contacting with the fluid. On an inside surface of a welding part 4S of the introduction pipe part 4, a guide pipe 11 for guiding the liquefied gas to a heat transfer pipe part 5 side is arranged at an interval.SELECTED DRAWING: Figure 2

Description

本発明は、液化天然ガス（ＬＮＧ）、液化アルゴン、液化窒素、液化酸素、液化エタン、液化エチレンを含む液化ガスを熱交換用の流体で加熱（熱交換）して気化させるための気化器に関する。   The present invention relates to a vaporizer for vaporizing a liquefied gas containing liquefied natural gas (LNG), liquefied argon, liquefied nitrogen, liquefied oxygen, liquefied ethane, liquefied ethylene, by heat exchange (heat exchange) with a fluid for heat exchange. .

上記気化器としては、熱交換用の流体が供給されて収容される下方開放型で金属製の容器と、この容器の下方を閉じる金属製の底板と、この底板を貫通して容器の上部へ向かって延びるとともに該上部で折り返されて下方まで延びるスパイラル状の伝熱管と、を備え、前記伝熱管の上手側端部が、底板に形成の孔を塞ぐドーム形状で金属製のキャップの湾曲状の天井壁に貫通して溶接により固定されている（例えば特許文献１参照）。   As the above-mentioned vaporizer, a lower open type metal container to which a fluid for heat exchange is supplied and stored, a metal bottom plate closing the bottom of the container, and a bottom plate penetrating the bottom plate to the top of the container A spiral heat transfer tube extending toward the upper portion and being folded back at the upper portion, the upper end of the heat transfer tube closing the hole formed on the bottom plate; It penetrates and is fixed by welding to the ceiling wall of (refer patent document 1).

特開２０１３−４４３４７号公報JP 2013-44347 A

上記構成の気化器の作動中において、前記溶接部の外側部分に、容器内を流れる熱交換用の流体からの高温（約６０℃の温水）の熱が直接伝達される一方、前記溶接部の内側部分に、液化ガスの代表とも言える液化天然ガス（ＬＮＧ）からの極低温（−１５０℃〜−１６０℃）の熱が伝熱管を介して伝達される。これら熱交換用の流体の高温の熱と液化天然ガスの極低温の熱との間には大きな温度差があり、この大きな温度差に応じた熱応力が溶接部に作用することになる。しかし、この熱応力が作用することを解消する手立てが講じられていないため、溶接部が早期に破損してしまうことがあった。   During operation of the carburetor with the above configuration, the heat of high temperature (hot water of about 60 ° C.) from the heat exchange fluid flowing in the vessel is directly transmitted to the outer part of the weld, while In the inner part, cryogenic (-150 ° C. to -160 ° C.) heat from liquefied natural gas (LNG), which can be said to be representative of liquefied gas, is transferred via a heat transfer tube. There is a large temperature difference between the high temperature heat of the heat exchange fluid and the cryogenic heat of the liquefied natural gas, and thermal stress corresponding to this large temperature difference will act on the weld. However, since measures for eliminating the effect of the thermal stress have not been taken, the weld may be damaged prematurely.

本発明が前述の状況に鑑み、解決しようとするところは、溶接部が早期に破損してしまうことを抑制することができる気化器を提供することを課題とする。   SUMMARY OF THE INVENTION In view of the above-described situation of the present invention, it is an object of the present invention to provide a carburetor capable of suppressing premature failure of a weld.

本発明の気化器は、前述の課題解決のために、熱交換用の流体を収容する金属製の容器と、該容器に形成の第１貫通孔を貫通して該第１貫通孔に溶接により固定され液化ガスを該容器内へ導入するための金属製の導入パイプ部と、該導入パイプ部からの液化ガスを前記流体との接触により気化させながら案内するための伝熱管部と、該伝熱管部からの液化ガスを前記容器に形成の第２貫通孔を貫通して該容器外へ導出するための導出パイプ部と、を備えている気化器であって、前記導入パイプ部の溶接部の内側面に隙間を開けて該液化ガスを前記伝熱管部側へ案内するための案内パイプを該導入パイプ部内に配置したことを特徴としている。   In order to solve the problems described above, the vaporizer according to the present invention includes a metal container for containing a heat exchange fluid, and a first through hole formed in the container and welded to the first through hole. A metal inlet pipe portion for introducing liquefied gas into the container which is fixed, a heat transfer pipe portion for guiding while liquefied gas from the inlet pipe portion is vaporized by contact with the fluid, and a heat transfer pipe portion And a lead-out pipe portion for leading the liquefied gas from the heat pipe portion to the outside of the container through the second through hole formed in the container, the vaporizer comprising: a welded portion of the introduction pipe portion A guide pipe for guiding the liquefied gas to the heat transfer pipe side by opening a gap on the inner surface of the housing is disposed in the introduction pipe.

かかる構成によれば、導入パイプ部の溶接部の内側面に液化ガスが接触しないように溶接部の内側面に隙間を開けて液化ガスを伝熱管部側へ案内するための案内パイプを導入パイプ部内に配置することによって、導入パイプ部の溶接部の内側面に案内パイプを流れる液化ガスの容器内への導入直後における低温の熱が伝達されることを隙間によって抑制することができる。従って、導入パイプ部の溶接部の外面側に、熱交換用の流体の熱は伝達されるが、導入パイプ部の溶接部の内面側に、液化ガスの低温の熱が直接伝達されることを隙間によって抑制されるので、導入パイプ部の溶接部の外面側と内面側とで大きな温度差が発生しない。よって、液化ガスと熱交換用の流体との大きな温度差に応じた熱応力が溶接部に加わり難いので、導入パイプ部の溶接部が早期に破損することを抑制することができる。   According to this configuration, the guide pipe for guiding the liquefied gas to the heat transfer pipe side by opening a gap in the inner side of the weld so that the liquefied gas does not contact the inner side of the weld of the introduction pipe. By disposing in the portion, the gap can suppress the transfer of low-temperature heat immediately after introduction into the container of the liquefied gas flowing through the guide pipe to the inner surface of the welded portion of the introduction pipe portion. Therefore, although the heat of the fluid for heat exchange is transmitted to the outer surface side of the welded portion of the introductory pipe portion, the low temperature heat of liquefied gas is directly transmitted to the inner surface side of the welded portion of the introductory pipe portion. Since the gap is suppressed, a large temperature difference does not occur between the outer surface side and the inner surface side of the welded portion of the introduction pipe portion. Therefore, it is difficult to apply thermal stress according to a large temperature difference between the liquefied gas and the fluid for heat exchange to the welded portion, so that it is possible to suppress early breakage of the welded portion of the introduction pipe portion.

また、本発明の気化器は、前記導入パイプ部へ液化ガスを供給するための供給管を備え、該供給管の供給方向下手側端部と前記導入パイプ部の供給方向上手側端部とがフランジ連結され、前記案内パイプが、前記導入パイプ部のフランジ部と前記供給管のフランジ部との間に挟み込んだ状態で固定される固定用フランジ部と、該固定用フランジ部の内側縁部から前記導入パイプ部の溶接部を越えて前記容器内に突出する筒部と、を備えていてもよい。   Further, the vaporizer according to the present invention comprises a supply pipe for supplying liquefied gas to the introduction pipe portion, and the lower end portion of the supply pipe in the supply direction and the upper end portion of the introduction pipe portion in the supply direction are And a fixing flange portion which is flange-connected and fixed in a state where the guide pipe is sandwiched between the flange portion of the introduction pipe portion and the flange portion of the supply pipe, and an inner edge portion of the fixing flange portion And a tubular portion protruding into the container beyond the welded portion of the introduction pipe portion.

上記のように、案内パイプの固定用フランジ部を導入パイプ部のフランジ部と供給管のフランジ部との間に挟み込んだ状態で固定するだけで、案内パイプを迅速に取り付けることができる。また、固定用フランジ部の内側縁部から導入パイプ部の溶接部を越えて容器内に突出する筒部を備えているので、導入パイプ部の溶接部に低温の液化ガスが直接接触することを確実に阻止することができる。   As described above, the guide pipe can be quickly attached only by fixing the fixing flange of the guide pipe between the flange of the introduction pipe and the flange of the supply pipe. In addition, since the cylindrical portion is projected into the container from the inner edge of the fixing flange portion beyond the weld portion of the introductory pipe portion, direct contact of low temperature liquefied gas with the weld portion of the introductory pipe portion is required. It can be reliably stopped.

また、本発明の気化器は、前記案内パイプの筒部の外側面の周方向複数箇所に、径方向外側に突出して該筒部の外側面が前記導入パイプ部の溶接部の内側面に当接することを阻止する位置決め部を備えていてもよい。   In the carburetor according to the present invention, the outer surface of the cylindrical portion protrudes radially outward at a plurality of circumferential positions on the outer surface of the cylindrical portion of the guide pipe, and the outer surface of the cylindrical portion contacts the inner surface of the welded portion of the introduction pipe portion. You may provide the positioning part which prevents contacting.

上記のように、筒部の外側面が導入パイプ部の溶接部の内側面に当接することを阻止する位置決め部を備えているので、案内パイプの取付時に導入パイプ部の中心を大きく外れて片寄った位置に配置されることがない。よって、案内パイプの外側面が導入パイプ部の溶接部の内側面に当接することがない。   As described above, since the positioning portion is provided to prevent the outer surface of the cylindrical portion from coming into contact with the inner surface of the welded portion of the introductory pipe portion, the center of the introductory pipe portion is largely deviated when the guide pipe is attached. It is not placed in the same position. Thus, the outer surface of the guide pipe does not abut on the inner surface of the welded portion of the introduction pipe portion.

また、本発明の気化器は、前記位置決め部が、前記導入パイプ部の溶接部から離れた位置に備えていることが好ましい。   In the carburetor of the present invention, preferably, the positioning portion is provided at a position apart from the welding portion of the introduction pipe portion.

上記のように、位置決め部が、導入パイプ部の溶接部から離れた位置に備えていれば、位置決め部が導入パイプ部の溶接部の内側面に当接して案内パイプを流れる液化ガスの低温の熱が位置決め部を介して導入パイプ部の溶接部に伝達されることがない。これにより、導入パイプ部の溶接部が早期に破損することをより一層確実に抑制することができる。   As described above, if the positioning portion is provided at a position away from the welded portion of the introduction pipe portion, the positioning portion abuts on the inner side surface of the welded portion of the introduction pipe portion and the low temperature of liquefied gas flowing through the guide pipe Heat is not transmitted to the weld of the introductory pipe through the positioning part. As a result, it is possible to more reliably suppress premature failure of the welded portion of the introductory pipe portion.

本発明によれば、導入パイプ部の溶接部の内側面に隙間を開けて導入パイプ部内に配置することによって、溶接部が早期に破損してしまうことを抑制することができる気化器を提供することができる。   According to the present invention, there is provided a carburetor capable of preventing the weld from being damaged prematurely by placing a gap in the inner surface of the weld of the introductory pipe and placing it in the introductory pipe. be able to.

本発明に係る気化器を備える気化装置の概略図である。It is the schematic of a vaporization apparatus provided with the vaporizer which concerns on this invention. （ａ）は、同気化器に備える筒部材の取付部の縦断側面図、（ｂ）は筒部材を下から見た底面図である。(A) is a longitudinal cross-sectional side view of the attachment part of the cylinder member with which the same vaporizer is equipped, (b) is the bottom view which looked at the cylinder member from the bottom. 液化天然ガスの供給をＯＮ−ＯＦＦしながら容器内と容器外との温度を検出した時の時間と温度との関係を示すグラフであり、（ａ）は、案内パイプを装着した場合のグラフであり、（ｂ）は、案内パイプを装着していない場合のグラフである。It is a graph which shows the relation of time and temperature when temperature of the inside of a container and the outside of a container was detected, turning on supply of liquefied natural gas ON-OFF, and (a) is a graph at the time of wearing a guide pipe. In the case where the guide pipe is not attached, FIG. 温度測定箇所を変更した同気化器に備える筒部材の取付部の縦断側面図である。It is a longitudinal cross-sectional view of the attachment part of the cylinder member with which the same vaporizer which changed the temperature measurement location is equipped. 液化天然ガスの供給をＯＮ−ＯＦＦしながら容器内と容器外との温度を図４の温度測定箇所で検出した時の時間と温度との関係を示すグラフであり、（ａ）は、案内パイプを装着した場合のグラフであり、（ｂ）は、案内パイプを装着していない場合のグラフである。It is a graph which shows the relationship of time and temperature when detecting the temperature of the inside of a container and the outside of a container at the temperature measurement location of FIG. 4 while turning on and off the supply of liquefied natural gas, (a) is a guide pipe (B) is a graph when the guide pipe is not attached.

以下、本発明に係る気化器の実施形態について、図面を参照しつつ説明する。   Hereinafter, an embodiment of a vaporizer concerning the present invention is described, referring to drawings.

図１に、液化ガスである液化天然ガス（ＬＮＧ）を流体との熱交換によって気化させるための気化器（タンク式の熱交換器とも言う）１を備える気化装置２を示している。この気化器１は、熱交換用の流体を収容する金属製の容器３と、容器３に形成の第１貫通孔３ａを貫通して第１貫通孔３ａに溶接により固定され液化天然ガスを容器３内へ導入するための金属製の導入パイプ部４と、導入パイプ部４からの液化天然ガスを受け取り流体との接触により気化させながら案内するための金属製の伝熱管部５と、伝熱管部５からの液化天然ガスを受け取り容器３に形成の第２貫通孔３ｂを貫通して容器３外へ導出するための金属製の導出パイプ部６と、を備えている。前記金属としては、ステンレス製のものが最適であるが、各種の金属を用いてもよい。   FIG. 1 shows a vaporizer 2 including a vaporizer (also referred to as a tank type heat exchanger) 1 for vaporizing liquefied natural gas (LNG), which is a liquefied gas, by heat exchange with a fluid. The vaporizer 1 is fixed to the first through hole 3a by welding through the first through hole 3a formed in the container 3 and the metal container 3 for containing the fluid for heat exchange, and the liquefied natural gas is stored in the first through hole 3a. 3 A metal introduction pipe 4 for introduction into the inside, a metal heat transfer pipe 5 for receiving liquefied natural gas from the introduction pipe 4 while guiding it by contact with a fluid, and a heat transfer pipe 5 And a metal outlet pipe portion 6 for discharging the liquefied natural gas from the portion 5 out of the container 3 through the second through hole 3b formed in the receiving container 3. As the metal, although stainless steel is optimal, various metals may be used.

容器３は、上下方向に長い縦長状で円筒状（角筒状でもよい）の容器からなり、上端が天壁部３Ｂにより閉じられ、かつ、下端が底壁部３Ａにより閉じられている。天壁部３Ｂの中心に前記第２貫通孔３ｂが形成され、底壁部３Ａの中心に前記第１貫通孔３ａが形成されている。また、容器３の上端部の周方向一箇所に温水を水平方向から供給するための温水供給管７が接続されている。また、容器３の下端部の周方向一箇所に温水を外部へ導出するための温水導出管８が接続されている。ここでは、温水供給管７と温水導出管８とを周方向において同一位置で容器３に接続しているが、異なる位置で接続する構成であってもよい。   The container 3 is formed of a vertically long, vertically elongated, cylindrical (or rectangular) container. The upper end is closed by the top wall 3B, and the lower end is closed by the bottom wall 3A. The second through hole 3b is formed at the center of the top wall 3B, and the first through hole 3a is formed at the center of the bottom wall 3A. In addition, a hot water supply pipe 7 for supplying hot water from the horizontal direction is connected to one circumferential position at the upper end portion of the container 3. In addition, a hot water outlet pipe 8 for leading the hot water to the outside is connected to one circumferential position at the lower end portion of the container 3. Here, the hot water supply pipe 7 and the hot water outlet pipe 8 are connected to the container 3 at the same position in the circumferential direction, but may be connected at different positions.

導入パイプ部４は、直線状の第１円筒部４Ａと、この第１円筒部４Ａの上下端に位置する一対の第１フランジ部４Ｂ，４Ｂと、を備えている。導入パイプ部４の下端の第１フランジ部４Ｂには、導入パイプ部４へ液化天然ガス（ＬＮＧ）を供給するための供給管９のフランジ部９Ａが連結されている。また、導入パイプ部４の上端の第１フランジ部４Ｂには、伝熱管部５の下端に備える連結用フランジ部５Ｂが連結されている。   The introduction pipe portion 4 includes a linear first cylindrical portion 4A, and a pair of first flange portions 4B and 4B located at the upper and lower ends of the first cylindrical portion 4A. A flange portion 9A of a supply pipe 9 for supplying liquefied natural gas (LNG) to the introduction pipe portion 4 is connected to the first flange portion 4B at the lower end of the introduction pipe portion 4. Further, a connection flange portion 5B provided at the lower end of the heat transfer pipe portion 5 is connected to the first flange portion 4B at the upper end of the introduction pipe portion 4.

伝熱管部５は、同一巻径でコイル状に巻かれたコイル部５Ａと、このコイル部５Ａの上下端に位置する連結用フランジ部５Ｂ，５Ｂと、を備えている。従って、導入パイプ部４から受け取った液化ガスは、コイル部５Ａの内部を移動する移動中に容器３内を対流する流体（温水）との接触によって加熱（熱交換）されて気化し、気化した液化ガスが導出パイプ部６に受け渡される。要するに、コイル部５Ａには、液体状態の液化ガスが下方から供給されて気化状態になった液化ガスが導出パイプ部６を介して容器３外の上方へ排出される。この排出された液化ガスは、排出管１０を介して所定場所へ移送される。   The heat transfer tube portion 5 includes a coil portion 5A wound in a coil shape with the same winding diameter, and connecting flange portions 5B and 5B positioned at upper and lower ends of the coil portion 5A. Accordingly, the liquefied gas received from the introduction pipe portion 4 is heated (heat exchange), vaporized and vaporized by contact with a fluid (warm water) convecting the inside of the container 3 while moving inside the coil portion 5A. The liquefied gas is delivered to the outlet pipe 6. In short, the liquefied gas in a liquid state is supplied from below to the coil portion 5A, and the liquefied gas in a vaporized state is discharged to the upper side outside the container 3 through the outlet pipe portion 6. The discharged liquefied gas is transferred to a predetermined place via the discharge pipe 10.

導出パイプ部６は、直線状の第２円筒部６Ａと、この第２円筒部６Ａの上下端に位置する一対の第２フランジ部６Ｂ，６Ｂと、を備えている。導出パイプ部６の下端の第２フランジ部４Ｂには、伝熱管部５の連結用フランジ部５Ｂが連結されている。また、導出パイプ部６の上端の第２フランジ部４Ｂには、排出管１０のフランジ部１０Ｂが連結されている。   The lead-out pipe portion 6 includes a linear second cylindrical portion 6A, and a pair of second flange portions 6B and 6B located at the upper and lower ends of the second cylindrical portion 6A. The connecting flange 5 </ b> B of the heat transfer pipe 5 is connected to the second flange 4 </ b> B at the lower end of the lead-out pipe 6. Further, the flange portion 10B of the discharge pipe 10 is connected to the second flange portion 4B at the upper end of the lead-out pipe portion 6.

前述のように、供給管９と導入パイプ部４とがフランジ連結され、導入パイプ部４と伝熱管部５とがフランジ連結されている。また、伝熱管部５と導出パイプ部６とがフランジ連結され、導出パイプ部６と排出管１０とがフランジ連結されているが、他の連結構造により連結されていてもよい。また、導入パイプ部４と伝熱管部５と導出パイプ部６とがそれぞれ別の３本のパイプから構成しているが、１本のパイプ又は２本のパイプで構成してもよい。   As described above, the supply pipe 9 and the introduction pipe portion 4 are flange-connected, and the introduction pipe portion 4 and the heat transfer pipe portion 5 are flange-connected. Further, although the heat transfer pipe portion 5 and the outlet pipe portion 6 are flange-connected and the outlet pipe portion 6 and the discharge pipe 10 are flange-connected, they may be connected by another connecting structure. Moreover, although the introductory pipe part 4, the heat-transfer pipe part 5, and the lead-out pipe part 6 are each comprised from another three pipes, you may comprise by one pipe or two pipes.

図２（ａ）に示すように、導入パイプ部４の溶接部４Ｓの内側面に液化天然ガスが接触しないように該導入パイプ部４の溶接部の内側面に隙間Ｈを開けて液化天然ガスを伝熱管部５側へ案内するための案内パイプ１１を配置している。導入パイプ部４の溶接部４Ｓは、底壁部３Ａの容器３内部側（図１では上面側）に環状に形成されている。   As shown in FIG. 2A, a gap H is opened in the inner side surface of the welded portion of the introduction pipe portion 4 so that the liquefied natural gas does not contact the inner side surface of the welded portion 4S of the introduction pipe portion 4 A guide pipe 11 is disposed to guide the heat transfer tube 5 to the heat transfer tube 5 side. The welding portion 4S of the introduction pipe portion 4 is annularly formed on the inner side (upper surface side in FIG. 1) of the bottom wall portion 3A of the container 3.

案内パイプ１１は、導入パイプ部４の内側面との間に所定の隙間Ｈが形成されるように、導入パイプ部４の内径寸法よりも小さな外径寸法を有する金属製（ここでは、ステンレス製）から構成されている。具体的には、案内パイプ１１は、図２（ａ），（ｂ）に示すように、縦長の円筒部１１Ａと、この円筒部１１Ａの一端（上端）に溶接され導入パイプ部４のフランジ部４Ｂと伝熱管部５の連結用フランジ部５Ｂとの間に挟み込んだ状態で固定される板状で円環状の固定用フランジ部１１Ｂと、を備えている。このように液化ガスを案内する案内パイプ１１を配置することによって、導入パイプ部４の溶接部４Ｓの外面側に、熱交換用の流体Ｒの熱は伝達されるが、導入パイプ部４の溶接部４Ｓの内面側に、液化天然ガスの極低温の熱が直接伝達されることを隙間Ｈによって抑制することができる。よって、導入パイプ部４の溶接部４Ｓの外面側と内面側とで大きな温度差が発生しない。従って、液化天然ガスと熱交換用の流体Ｒとの大きな温度差に応じた熱応力が溶接部４Ｓに加わることがないので、導入パイプ部４の溶接部４Ｓが早期に破損することを抑制することができる。尚、隙間Ｈには、案内パイプ１１の上端から出た液化ガスの一部が滞留することがあるが、この滞留する液化ガスは、供給管９から導入された直後の液化ガスではなく、液化天然ガスの極低温の熱が案内パイプ１１に伝達された後の液化ガス（温度が上昇した液化ガス）である。要するに、溶接部４Ｓの内面側に供給管９から導入された直後の液化ガスの極低温の熱が直接伝達されることを抑制する緩衝材として案内パイプ１１が作用することによって、上記のように導入パイプ部４の溶接部４Ｓが早期に破損することを抑制することができる。   The guide pipe 11 is made of metal having an outer diameter smaller than the inner diameter of the introduction pipe portion 4 (here, stainless steel) so that a predetermined gap H is formed between the guide pipe 11 and the inner side surface of the introduction pipe portion 4 It consists of). Specifically, as shown in FIGS. 2 (a) and 2 (b), the guide pipe 11 is welded to the vertically long cylindrical portion 11A and one end (upper end) of the cylindrical portion 11A and the flange portion of the introduction pipe 4 A plate-like and annular fixing flange portion 11B fixed in a state of being sandwiched between 4B and the connecting flange portion 5B of the heat transfer tube portion 5 is provided. By arranging the guide pipe 11 for guiding the liquefied gas in this manner, the heat of the fluid R for heat exchange is transmitted to the outer surface side of the welded portion 4S of the introduction pipe portion 4, but the welding of the introduction pipe portion 4 The clearance H can suppress direct transfer of the cryogenic heat of the liquefied natural gas to the inner surface side of the portion 4S. Therefore, a large temperature difference does not occur between the outer surface side and the inner surface side of the welded portion 4S of the introduction pipe portion 4. Therefore, thermal stress corresponding to a large temperature difference between the liquefied natural gas and the fluid R for heat exchange is not applied to the welded portion 4S, so that the welded portion 4S of the introduction pipe portion 4 is prevented from being damaged early. be able to. In the gap H, a part of the liquefied gas coming out of the upper end of the guide pipe 11 may be retained, but the retained liquefied gas is not the liquefied gas immediately after being introduced from the supply pipe 9, but is liquefied. It is a liquefied gas (liquefied gas whose temperature has risen) after the cryogenic heat of natural gas has been transferred to the guide pipe 11. In short, as described above, the guide pipe 11 acts as a cushioning material to suppress the direct transfer of the cryogenic heat of the liquefied gas immediately after being introduced from the supply pipe 9 to the inner surface side of the welding portion 4S. It is possible to suppress that the weld portion 4S of the introduction pipe portion 4 is damaged prematurely.

図２（ａ）では、案内パイプ１１の固定用フランジ部１１Ｂの上面及び下面のそれぞれにガスケット１２を当接した状態にする。この状態から、案内パイプ１１の円筒部１１Ａを導入パイプ部４の上端から挿入する。次に、供給管９のフランジ部９Ａを案内パイプ１１の固定用フランジ部１１Ｂの下面のガスケット１２に当接した状態にし、２つのフランジ部９Ｂと４Ｂとを複数のボルト１３及びナット１４により連結する。これによって、固定用フランジ部１１Ｂが供給管９のフランジ部９Ｂと導入パイプ部４のフランジ部４Ｂとの間にガスケット１２，１２を介して挟み込まれた状態で固定される。従って、既存の設備が供給管９のフランジ部９Ａと導入パイプ部４のフランジ部４Ｂを備えていれば、設備に改良を加えることなく、案内パイプ１１を迅速に取り付けることができる。また、固定用フランジ部１１Ｂの内側縁部から導入パイプ部４の溶接部４Ｓを越えて容器３内に突出する円筒部１１Ａを備えているので、導入パイプ部４の溶接部４Ｓに液化天然ガスが接触することを確実に阻止することができる。   In FIG. 2A, the gasket 12 is in contact with the upper surface and the lower surface of the fixing flange portion 11B of the guide pipe 11. From this state, the cylindrical portion 11A of the guide pipe 11 is inserted from the upper end of the introduction pipe portion 4. Next, the flange portion 9A of the supply pipe 9 is in contact with the gasket 12 on the lower surface of the fixing flange portion 11B of the guide pipe 11, and the two flange portions 9B and 4B are connected by the plurality of bolts 13 and nuts 14. Do. As a result, the fixing flange portion 11B is fixed in a state of being sandwiched between the flange portion 9B of the supply pipe 9 and the flange portion 4B of the introduction pipe portion 4 via the gaskets 12,12. Therefore, if the existing installation is provided with the flange 9A of the supply pipe 9 and the flange 4B of the introduction pipe 4, the guide pipe 11 can be attached quickly without adding any improvement to the installation. Further, since the cylindrical portion 11A is protruded from the inner edge of the fixing flange portion 11B into the container 3 beyond the weld portion 4S of the introduction pipe portion 4, liquefied natural gas is produced at the weld portion 4S of the introduction pipe portion 4. Can be reliably prevented from contacting.

また、案内パイプ１１の円筒部１１Ａの外側面のうちの溶接部４Ｓから離れた位置となるフランジ部９Ａ寄りの外側面の周方向複数箇所（図２（ｂ）では３箇所であるが、２箇所又は４箇所以上でもよい）に、径方向外側に突出して円筒部１１Ａの外側面が導入パイプ部４の溶接部４Ｓの内側面に当接することを阻止する位置決め部１１Ｃを一体形成している。各位置決め部１１Ｃは、案内パイプ１１の長手方向及び周方向に所定長さを有する突起から構成されている。このように、円筒部１１Ａの外側面が導入パイプ部４の溶接部４Ｓの内側面に当接することを阻止する位置決め部１１Ｃを備えているので、案内パイプ１１の取付時に導入パイプ部４の中心を外れて片寄って配置されて、案内パイプ１１の外側面が導入パイプ部４の溶接部４Ｓの内側面に当接することがないようにしている。また、位置決め部１１Ｃが、導入パイプ部４の溶接部４Ｓから離れた位置に備えていれば、位置決め部１１Ｃが導入パイプ部４の溶接部４Ｓの内側面に当接して案内パイプ１１を流れる液化天然ガスの熱が導入パイプ部４の溶接部４Ｓに伝達されることがない。これにより、導入パイプ部４の溶接部４Ｓが早期に破損することをより一層確実に抑制することができる。尚、案内パイプ１１の内径寸法が導入パイプ部４の内径寸法よりも小さくなり、液化天然ガスを案内する流量が小さくなるが、液化天然ガスを導入パイプ部４が案内できる最大流量で案内することがなく、余裕を見て導入パイプ部４の内径寸法を決定しているため、案内パイプ１１を装着しても気化器１の運転に支障を来すことはない。   Further, among the outer surfaces of the cylindrical portion 11A of the guide pipe 11, there are a plurality of circumferential portions (three in FIG. 2B) in the circumferential direction of the outer surface near the flange portion 9A which is a position away from the welding portion 4S. A positioning portion 11C is integrally formed on the portion or four or more portions, which protrudes radially outward and prevents the outer surface of the cylindrical portion 11A from coming into contact with the inner surface of the welded portion 4S of the introduction pipe portion 4 . Each positioning portion 11C is formed of a protrusion having a predetermined length in the longitudinal direction and the circumferential direction of the guide pipe 11. As described above, since the positioning portion 11C that prevents the outer surface of the cylindrical portion 11A from coming into contact with the inner side surface of the welded portion 4S of the introduction pipe portion 4, the center of the introduction pipe portion 4 is attached when the guide pipe 11 is attached. Of the guide pipe 11 so that the outer surface of the guide pipe 11 does not abut on the inner surface of the welded portion 4S of the introduction pipe portion 4. Further, if the positioning portion 11C is provided at a position away from the welding portion 4S of the introduction pipe portion 4, the positioning portion 11C abuts on the inner side surface of the welding portion 4S of the introduction pipe portion 4 and flows through the guide pipe 11 The heat of the natural gas is not transmitted to the weld 4S of the introduction pipe 4. As a result, it is possible to more reliably suppress early failure of the welded portion 4S of the introduction pipe portion 4. The inner diameter of the guide pipe 11 is smaller than the inner diameter of the introduction pipe 4 and the flow rate for guiding the liquefied natural gas is smaller, but the liquefied natural gas is guided at the maximum flow rate which can be guided by the introduction pipe 4 Since the inner diameter of the introduction pipe portion 4 is determined with a margin, the operation of the vaporizer 1 is not hindered even if the guide pipe 11 is attached.

案内パイプ１１を装着した場合と、案内パイプ１１を装着しない場合とで容器３内と容器３外の温度測定の実験を行った。実験としては、１０秒間だけ液化天然ガスを気化器１へ供給した後、１０秒間だけ気化器１への液化天然ガスの供給を停止するといったＯＮ−ＯＦＦ運転を１０分間繰り返し行い、その間の温度を連続的に測定し、図３（ａ）が案内パイプ１１を装着した場合のグラフを示し、図３（ｂ）が案内パイプ１１を装着しない場合のグラフを示している。温度を測定した場所としては、図２（ａ）に示すように、容器３内では、導入パイプ部４の溶接部４Ｓの近傍の２箇所である第１箇所ＴＥ１と第２箇所ＴＥ２とを測定場所とし、容器３外では、容器３の底壁部３Ａの真下でかつ導入パイプ部４の近傍の２箇所である第３箇所ＴＥ３と第４箇所ＴＥ４とを測定場所とした。図３（ａ），（ｂ）の第５箇所ＴＥ５は、容器３内の所定箇所で測定した温水温度であり、いずれの場合においても４０℃から５０℃の間を推移している。また、図３（ａ），（ｂ）のＴＥ６は、導出パイプ部６の出口箇所で測定した液化天然ガスの温度であり、いずれの場合においても３０℃から４０℃の間を推移している。尚、温度測定には、第１箇所ＴＥ１から第５箇所ＴＥ５のそれぞれに配置した熱電対を用いた。   The experiment of measuring the temperature inside the container 3 and outside the container 3 was performed when the guide pipe 11 was attached and when the guide pipe 11 was not attached. As an experiment, after supplying liquefied natural gas to the vaporizer 1 for only 10 seconds, ON-OFF operation of stopping the supply of liquefied natural gas to the vaporizer 1 for only 10 seconds is repeated for 10 minutes, and the temperature during It measures continuously, FIG. 3 (a) shows the graph at the time of mounting the guide pipe 11, and FIG. 3 (b) shows the graph at the time of not mounting the guide pipe 11. As shown in FIG. As a place where the temperature was measured, as shown in FIG. 2A, in the container 3, the first place TE1 and the second place TE2 which are two places in the vicinity of the welded part 4S of the introduction pipe part 4 are measured The third place TE3 and the fourth place TE4 which are two places just under the bottom wall 3A of the container 3 and in the vicinity of the introduction pipe 4 outside the container 3 are used as places. The 5th part TE5 of Drawing 3 (a) and (b) is warm water temperature measured at a predetermined part in container 3, and changes between 40 ° C and 50 ° C in any case. Moreover, TE6 of FIG. 3 (a), (b) is the temperature of the liquefied natural gas measured at the exit location of the lead-out pipe part 6, and in any case, it changes between 30 degreeC and 40 degreeC . In addition, the thermo couple arrange | positioned to each of 1st location TE1 to 5th location TE5 was used for temperature measurement.

図３（ａ），（ｂ）を考察すると、第１箇所ＴＥ１から第４箇所ＴＥ４の全ての箇所での温度において、案内パイプ１１を装着した場合の方が案内パイプ１１を装着しない場合よりも高い温度（約２０℃）になっている。これは、液化天然ガスの熱が第１箇所ＴＥ１〜第４箇所ＴＥ４のそれぞれに伝達されることが案内パイプ１１によって抑制されていることが把握できる。しかも、第１箇所ＴＥ１と第２箇所ＴＥ２においては、案内パイプ１１を装着した場合の温度の変動量が案内パイプ１１を装着しない場合の温度の変動量に比べて少なくなっている。このことから、液化天然ガスの熱が第１箇所ＴＥ１と第２箇所ＴＥ２に伝達されることが案内パイプ１１によって抑制されていることが把握できる。また、第３箇所ＴＥ３と第４箇所ＴＥ４においても、第１箇所ＴＥ１及び第２箇所ＴＥ２と同様に案内パイプ１１を装着した場合の温度の変動量が案内パイプ１１を装着しない場合の温度の変動量に比べて少なくなっている。従って、液化天然ガスの供給をＯＮ−ＯＦＦ運転で行う場合において、案内パイプ１１を装着した場合が案内パイプ１１を装着しない場合よりも導入パイプ部４の溶接部４Ｓに作用する温度差を小さくできるだけでなく、ＯＮ−ＯＦＦ運転による温度の変動量も少なく抑えることができる。よって、導入パイプ部４の溶接部４Ｓが早期に破損することをより一層確実に抑制することができる。   Considering FIGS. 3A and 3B, the temperature when the guide pipe 11 is attached is lower than the case where the guide pipe 11 is not attached at the temperatures of all the points from the first point TE1 to the fourth point TE4. The temperature is high (about 20 ° C.). It can be understood that this is suppressed by the guide pipe 11 that the heat of the liquefied natural gas is transmitted to each of the first place TE1 to the fourth place TE4. Moreover, in the first portion TE1 and the second portion TE2, the amount of temperature variation when the guide pipe 11 is attached is smaller than the amount of temperature variation when the guide pipe 11 is not attached. From this, it can be understood that the heat of the liquefied natural gas is suppressed by the guide pipe 11 to be transmitted to the first portion TE1 and the second portion TE2. Further, also in the third portion TE3 and the fourth portion TE4, the variation amount of the temperature when the guide pipe 11 is mounted as in the first portion TE1 and the second portion TE2 is the temperature change when the guide pipe 11 is not attached It is smaller than the amount. Therefore, when the supply of liquefied natural gas is performed in the ON-OFF operation, the temperature difference acting on the weld portion 4S of the introduction pipe portion 4 can be made as small as possible when the guide pipe 11 is attached compared to when the guide pipe 11 is not attached. Not only that, but also the amount of temperature fluctuation due to the ON-OFF operation can be reduced. Therefore, it is possible to more reliably suppress early failure of the welded portion 4S of the introduction pipe portion 4.

温水導出管８から導出された温水は、ボイラー装置１５により所定温度になるように加熱される。このボイラー装置１５は、容器３内の温水を温水導出管８から吸引して温水供給管７を介して容器３内へ供給するためのポンプ１６と、ポンプ１６で吸引した温水を約６０℃（温度は液化ガスが安全に気化することができる温度であれば、どのような温度に設定してもよい）まで加熱するボイラー１７と、ボイラー１７に供給する燃料としてのプロパンガス（ＬＰＧ）１８とを備えている。尚、ポンプ１６とボイラー１７との配管内には、圧力計１９及び流量計２０が設けられ、ポンプ１６による所定量の温水を常に供給できるようにポンプ１６を駆動制御している。   The hot water drawn out from the hot water lead-out pipe 8 is heated by the boiler device 15 to a predetermined temperature. The boiler device 15 sucks the hot water in the container 3 from the hot water outlet pipe 8 and supplies it into the container 3 through the hot water supply pipe 7, and the hot water sucked by the pump 16 at about 60 ° C. The temperature may be set to any temperature at which the liquefied gas can be safely vaporized, the boiler 17 may be heated to any temperature, and propane gas (LPG) 18 as a fuel supplied to the boiler 17 Is equipped. A pressure gauge 19 and a flow meter 20 are provided in the piping between the pump 16 and the boiler 17, and the pump 16 is driven and controlled so that a predetermined amount of hot water can always be supplied by the pump 16.

図２で温度測定した箇所を変更して、前述同様に、案内パイプ１１を装着した場合と、案内パイプ１１を装着しない場合とで容器３内と容器３外の温度測定の実験を行った。実験としては、前述と同様に、１０秒間だけ液化天然ガスを気化器１へ供給した後、１０秒間だけ気化器１への液化天然ガスの供給を停止するといったＯＮ−ＯＦＦ運転を１０分間繰り返し行い、その間の温度を連続的に測定し、図５（ａ）が案内パイプ１１を装着した場合のグラフを示し、図５（ｂ）が案内パイプ１１を装着しない場合のグラフを示している。温度を測定した場所は、図４に示すように、容器３内では、導入パイプ部４の内側面でかつ溶接部４Ｓの近傍の２箇所である第７箇所ＴＥ７と第８箇所ＴＥ８と導入パイプ部４の内側面でかつ溶接部４Ｓの近傍の１箇所である第９箇所ＴＥ９とを測定場所とした。容器３内に投入される温水温度を６０℃に設定している。尚、温度測定には、第７箇所ＴＥ７から第９箇所ＴＥ９のそれぞれに配置した熱電対を用いた。   The experiment of measuring the temperature inside the container 3 and the outside of the container 3 was performed in the case where the guide pipe 11 was attached and the case where the guide pipe 11 was not attached, as described above, except that the temperature measurement point in FIG. As an experiment, after supplying liquefied natural gas to the vaporizer 1 for 10 seconds as described above, ON-OFF operation of stopping the supply of liquefied natural gas to the vaporizer 1 for 10 seconds is repeated for 10 minutes. 5 (a) shows a graph when the guide pipe 11 is attached, and FIG. 5 (b) shows a graph when the guide pipe 11 is not attached. As for the place where temperature was measured, as shown in FIG. 4, in the container 3, it is an inner surface of the introductory pipe part 4, and seven places TE7 and eight places TE8 which are two places near the welding part 4S and an introductory pipe A ninth place TE9 which is an inner surface of the part 4 and one place in the vicinity of the welding part 4S was used as a measurement place. The temperature of the warm water introduced into the container 3 is set to 60.degree. In addition, the thermo couple arrange | positioned to each of 7th location TE7 to 9th location TE9 was used for temperature measurement.

図５（ａ），（ｂ）を考察すると、第７箇所ＴＥ７から第９箇所ＴＥ９の全ての箇所での温度において、案内パイプ１１を装着した場合の方が案内パイプ１１を装着しない場合よりも高い温度（約３０℃）になっている。これは、液化天然ガスの熱が第７箇所ＴＥ７〜第９箇所ＴＥ９のそれぞれに伝達されることが案内パイプ１１によって抑制されていることが把握できる。しかも、第７箇所ＴＥ７と第８箇所ＴＥ８においては、案内パイプ１１を装着した場合の温度の変動量が案内パイプ１１を装着しない場合の温度の変動量に比べて少なくなっている。このことから、液化天然ガスの熱が第７箇所ＴＥ７と第８箇所ＴＥ８に伝達されることが案内パイプ１１によって抑制されていることが把握できる。また、第９箇所ＴＥ９においても、第７箇所ＴＥ７と第８箇所ＴＥ８と同様に案内パイプ１１を装着した場合の温度の変動量が案内パイプ１１を装着しない場合の温度の変動量に比べて少なくなっている。従って、液化天然ガスの供給をＯＮ−ＯＦＦ運転で行う場合において、案内パイプ１１を装着した場合が案内パイプ１１を装着しない場合よりも導入パイプ部４の溶接部４Ｓに作用する温度差を小さくできるだけでなく、ＯＮ−ＯＦＦ運転による温度の変動量も少なく抑えることができる。よって、この実験結果においても、導入パイプ部４の溶接部４Ｓが早期に破損することをより一層確実に抑制することができる。   Considering FIGS. 5A and 5B, the temperature when the guide pipe 11 is attached is lower than the case where the guide pipe 11 is not attached at temperatures at all points from the seventh point TE7 to the ninth point TE9. It has become a high temperature (about 30 ° C). It can be understood that this is suppressed by the guide pipe 11 that the heat of the liquefied natural gas is transmitted to each of the seventh location TE7 to the ninth location TE9. Moreover, in the seventh portion TE7 and the eighth portion TE8, the amount of temperature variation when the guide pipe 11 is attached is smaller than the amount of temperature variation when the guide pipe 11 is not attached. From this, it can be understood that the heat of the liquefied natural gas is suppressed by the guide pipe 11 to be transmitted to the seventh location TE7 and the eighth location TE8. Further, also in the ninth portion TE9, the amount of temperature variation when the guide pipe 11 is attached as in the seventh portion TE7 and the eighth portion TE8 is smaller than the amount of temperature variation when the guide pipe 11 is not attached. It has become. Therefore, when the supply of liquefied natural gas is performed in the ON-OFF operation, the temperature difference acting on the weld portion 4S of the introduction pipe portion 4 can be made as small as possible when the guide pipe 11 is attached compared to when the guide pipe 11 is not attached. Not only that, but also the amount of temperature fluctuation due to the ON-OFF operation can be reduced. Therefore, also in this experimental result, it is possible to suppress the breakage of the weld portion 4S of the introduction pipe portion 4 at an early stage more reliably.

尚、本発明は、前記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。   The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

前記実施形態では、下から上へ液化天然ガスを流すようにしたが、上から下へ液化天然ガスを流すようにしてもよいし、また、左から右へ又は右から左へ液化天然ガスを流すようにしてもよいし、場合によっては、斜め方向に液化天然ガスを流すようにしてもよい。   In the embodiment, the liquefied natural gas is flowed from the bottom to the top, but the liquefied natural gas may be flowed from the top to the bottom, and the liquefied natural gas may be flowed from left to right or from right to left. It may be made to flow, and in some cases, liquefied natural gas may be made to flow in an oblique direction.

また、前記実施形態では、液化天然ガスを気化させる流体として、ボイラー１７で過熱した温水を用いたが、海水、井戸水、水道水等をそのまま用いてもよい。   Moreover, in the said embodiment, although the warm water superheated by the boiler 17 was used as a fluid which vaporizes liquefied natural gas, you may use seawater, well water, a tap water etc. as it is.

また、前記実施形態では、案内パイプ１１の円筒部１１Ａの外面に位置決め部１１Ｃを備えたが、案内パイプ１１の円筒部１１Ａの一端に備えたフランジ部１１Ｂの内周縁に、円筒部１１Ａの他端側に突出して案内パイプ１１の円筒部１１Ａの外面と導入パイプ部４の第１円筒部４Ａの内面との間に入り込んで位置決めする複数の突起を周方向に間隔を置いて一体形成してもよい。   In the embodiment, the positioning portion 11C is provided on the outer surface of the cylindrical portion 11A of the guide pipe 11. However, the inner peripheral edge of the flange portion 11B provided at one end of the cylindrical portion 11A of the guide pipe 11 is other than the cylindrical portion 11A. A plurality of projections are integrally formed at intervals in the circumferential direction so as to project to the end side and enter between the outer surface of the cylindrical portion 11A of the guide pipe 11 and the inner surface of the first cylindrical portion 4A of the introduction pipe 4 It is also good.

また、前記実施形態では、一つの伝熱管部５を備えた気化器１を示したが、複数以上の伝熱管部を備えた気化器であってもよい。また、伝熱管部５がコイル形状以外の形状であってもよい。   Moreover, in the said embodiment, although the vaporizer 1 provided with the one heat-transfer tube part 5 was shown, the vaporizer provided with the several or more heat-transfer tube part may be sufficient. Further, the heat transfer tube 5 may have a shape other than a coil shape.

また、前記実施形態では、案内パイプ１１が長手方向において同一直径を有するストレート管に構成したが、液化天然ガス案内方向下手側ほど幅広になるテーパー形状に構成してもよい。また、案内パイプ１１の断面形状は、円形に限らず、多角形状や楕円形状等、自由に変更可能である。   Moreover, in the said embodiment, although the guide pipe 11 was comprised to the straight pipe | tube which has the same diameter in a longitudinal direction, you may comprise in the taper shape which becomes wide as liquefied natural gas guide direction lower side. Further, the cross-sectional shape of the guide pipe 11 is not limited to a circular shape, and can be freely changed to a polygonal shape, an elliptical shape, or the like.

また、前記実施形態では、液化ガスとして、液化天然ガス（ＬＮＧ、−１５０℃〜−１６０℃）を例に挙げたが、液化アルゴン（−１８５℃）、液化窒素（１９５℃）、液化酸素（１８３℃）、液化エタン（−８９℃）、液化エチレン（−１０３℃）等、マイナス温度で液化されている各種の液化ガスであってもよい。特に−７０℃以下の温度の液化ガスに本発明の気化器を用いることによってより一層効果が大きい。また、前記実施形態では、液化天然ガス（ＬＮＧ）の実験のみを行っているが、各種の液化ガスであっても同様の実験結果が得られる。   Moreover, in the said embodiment, although liquefied natural gas (LNG, -150 degreeC--160 degreeC) was mentioned as an example as a liquefied gas, liquefied argon (-185 degreeC), liquefied nitrogen (195 degreeC), liquefied oxygen ( It may be 183 ° C.), liquefied ethane (-89 ° C.), liquefied ethylene (-103 ° C.), and various liquefied gases liquefied at negative temperature. In particular, the use of the vaporizer of the present invention for liquefied gas at a temperature of -70.degree. Moreover, in the said embodiment, although experiment of only liquefied natural gas (LNG) is conducted, the same experimental result is obtained even if it is various liquefied gas.

１…気化器、２…気化装置、３…容器、３Ａ…底壁部、３Ｂ…天壁部、３ａ…貫通孔、３ｂ…貫通孔、４…導入パイプ部、４Ａ…円筒部、４Ｂ…フランジ部、４Ｓ…溶接部、５…伝熱管部、５Ａ…コイル部、５Ｂ…連結用フランジ部、６…導出パイプ部、６Ａ…第２円筒部、６Ｂ…第２フランジ部、７…温水供給管、８…温水導出管、９…供給管、９…供給管、９Ａ…フランジ部、１０…排出管、１０Ｂ…フランジ部、１１…案内パイプ、１１Ａ…円筒部、１１Ｂ…固定用フランジ部、１１Ｃ…位置決め部、１２…ガスケット、１３…ボルト、１４…ナット、１５…ボイラー装置、１６…ポンプ、１７…ボイラー、１８…プロパンガス、１９…圧力計、２０…流量計、Ｈ…隙間、Ｒ…流体、ＴＥ１…第１箇所、ＴＥ２…第２箇所、ＴＥ３…第３箇所、ＴＥ４…第４箇所、ＴＥ５…温水温度、ＴＥ６…液化天然ガスの温度、ＴＥ７…第７箇所、ＴＥ８…第８箇所、ＴＥ９…第９箇所 DESCRIPTION OF SYMBOLS 1 ... Vaporizer, 2 ... Vaporization apparatus, 3 ... Container, 3A ... Bottom wall part, 3B ... Top wall part, 3a ... Through hole, 3b ... Through hole, 4 ... Introduction pipe part, 4A ... Cylindrical part, 4B ... Flange Part, 4S: Welded part, 5: Heat transfer pipe part, 5A: Coil part, 5B: Connecting flange part, 6: Derivative pipe part, 6A: Second cylindrical part, 6B: Second flange part, 7: Hot water supply pipe 8: hot water outlet pipe, 9: supply pipe, 9: supply pipe, 9A: flange portion, 10: discharge pipe, 10B: flange portion, 11: guide pipe, 11A: cylindrical portion, 11B: fixing flange portion, 11C ... positioning part, 12 ... gasket, 13 ... bolt, 14 ... nut, 15 ... boiler device, 16 ... pump, 17 ... boiler, 18 ... propane gas, 19 ... pressure gauge, 20 ... flow meter, H ... gap, R ... ... Fluid, TE1 ... first place, TE2 ... second place, TE3 ... second Locations, TE4 ... fourth positions, TE5 ... hot water temperature, TE6 ... temperature of the liquefied natural gas, TE7 ... seventh place, TE8 ... eighth positions, TE 9 ... places 9

本発明の気化器は、前述の課題解決のために、熱交換用の流体を収容する金属製の容器と、該容器に形成の第１貫通孔を貫通して該第１貫通孔に溶接により固定され液化ガスを該容器内へ導入するための金属製の導入パイプ部と、該導入パイプ部からの液化ガスを前記流体との接触により気化させながら案内するための伝熱管部と、該伝熱管部からの液化ガスを前記容器に形成の第２貫通孔を貫通して該容器外へ導出するための導出パイプ部と、を備えている気化器であって、前記導入パイプ部に供給される液化ガスの全量を該導入パイプ部の溶接部の内側面に隙間を開けた状態で前記伝熱管部側へ案内するための案内パイプを該導入パイプ部内に配置し、前記導入パイプ部へ液化ガスを供給するための供給管を備え、該供給管の供給方向下手側端部と前記導入パイプ部の供給方向上手側端部とがフランジ連結され、前記案内パイプが、前記導入パイプ部のフランジ部と前記供給管のフランジ部との間に挟み込んだ状態で固定される固定用フランジ部と、該固定用フランジ部の内側縁部から前記導入パイプ部の溶接部を越えて前記容器内に突出する筒部と、を備えていることを特徴としている。 In order to solve the problems described above, the vaporizer according to the present invention includes a metal container for containing a heat exchange fluid, and a first through hole formed in the container and welded to the first through hole. A metal inlet pipe portion for introducing liquefied gas into the container which is fixed, a heat transfer pipe portion for guiding while liquefied gas from the inlet pipe portion is vaporized by contact with the fluid, and a heat transfer pipe portion a carburetor and an outlet pipe portion for leading the liquefied gas from the heat pipe portion through the second through-hole formation in the vessel to the container outside, is supplied to the inlet pipe portion A guide pipe for guiding the whole amount of liquefied gas to the heat transfer pipe side in a state where a gap is opened in the inner side surface of the welded portion of the introduction pipe portion is disposed in the introduction pipe portion and liquefied to the introduction pipe portion A supply pipe for supplying gas, the supply direction of the supply pipe The side end portion and the supply direction upper end portion of the introduction pipe portion are flange-connected, and the guide pipe is fixed in a state of being sandwiched between the flange portion of the introduction pipe portion and the flange portion of the supply pipe. It is characterized by comprising: a fixing flange portion; and a cylindrical portion projecting from the inner edge portion of the fixing flange portion beyond the weld portion of the introduction pipe portion into the container .

Claims (4)

熱交換用の流体を収容する金属製の容器と、該容器に形成の第１貫通孔を貫通して該第１貫通孔に溶接により固定され液化ガスを該容器内へ導入するための金属製の導入パイプ部と、該導入パイプ部からの液化ガスを前記流体との接触により気化させながら案内するための伝熱管部と、該伝熱管部からの液化ガスを前記容器に形成の第２貫通孔を貫通して該容器外へ導出するための導出パイプ部と、を備えている気化器であって、
前記導入パイプ部の溶接部の内側面に隙間を開けて該液化ガスを前記伝熱管部側へ案内するための案内パイプを該導入パイプ部内に配置したことを特徴とする気化器。 A metal container for containing a fluid for heat exchange, and a metal for fixing a first through hole formed in the container by welding to the first through hole and introducing liquefied gas into the container And a heat transfer pipe portion for guiding while liquefied gas from the introduction pipe portion is vaporized by contact with the fluid, and second penetration of the liquefied gas from the heat transfer pipe portion formed in the container And a lead-out pipe portion for leading out of the vessel through the hole.
A carburetor characterized by disposing a guide pipe for guiding the liquefied gas to the heat transfer pipe side by opening a gap on the inner side surface of the welded portion of the introduction pipe. 前記導入パイプ部へ液化ガスを供給するための供給管を備え、該供給管の供給方向下手側端部と前記導入パイプ部の供給方向上手側端部とがフランジ連結され、前記案内パイプが、前記導入パイプ部のフランジ部と前記供給管のフランジ部との間に挟み込んだ状態で固定される固定用フランジ部と、該固定用フランジ部の内側縁部から前記導入パイプ部の溶接部を越えて前記容器内に突出する筒部と、を備えていることを特徴とする請求項１に記載の気化器。   The supply pipe for supplying liquefied gas to the introduction pipe portion is provided, and the lower end of the supply pipe in the supply direction and the upper end of the supply pipe in the supply direction are flange-connected, and the guide pipe is The fixing flange portion fixed in a state of being sandwiched between the flange portion of the introduction pipe portion and the flange portion of the supply pipe, and the welding portion of the introduction pipe portion from the inner edge portion of the fixing flange portion The carburetor according to claim 1, further comprising: a cylindrical portion projecting into the container. 前記案内パイプの筒部の外側面の周方向複数箇所に、径方向外側に突出して該筒部の外側面が前記導入パイプ部の溶接部の内側面に当接することを阻止する位置決め部を備えていることを特徴とする請求項２に記載の気化器。   At a plurality of circumferential positions on the outer surface of the cylindrical portion of the guide pipe, positioning portions are provided that protrude radially outward and prevent the outer surface of the cylindrical portion from contacting the inner surface of the welded portion of the introduction pipe portion The vaporizer according to claim 2, characterized in that: 前記位置決め部は、前記導入パイプ部の溶接部から離れた位置に備えていることを特徴とする請求項３に記載の気化器。   The said positioning part is provided in the position away from the welding part of the said introductory pipe part, The vaporizer | carburetor of Claim 3 characterized by the above-mentioned.
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