JPS61269035A - Method for detecting leak heat transfer pipe - Google Patents

Method for detecting leak heat transfer pipe

Info

Publication number
JPS61269035A
JPS61269035A JP60109295A JP10929585A JPS61269035A JP S61269035 A JPS61269035 A JP S61269035A JP 60109295 A JP60109295 A JP 60109295A JP 10929585 A JP10929585 A JP 10929585A JP S61269035 A JPS61269035 A JP S61269035A
Authority
JP
Japan
Prior art keywords
heat transfer
heat exchanger
transfer pipe
tube
header
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60109295A
Other languages
Japanese (ja)
Inventor
Etsuko Yoshida
吉田　悦子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP60109295A priority Critical patent/JPS61269035A/en
Publication of JPS61269035A publication Critical patent/JPS61269035A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • G01M3/228—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators for radiators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To make it possible to perform the detection of a leak heat transfer pipe within a short time, by mounting a material having the reactivity with high temp. gas in the vicinity of the heat transfer pipe and detecting the chemical reaction of the material. CONSTITUTION:The water side of a heat transfer pipe 6 is drained and subsequently evacuated under reduced pressure from the nozzle 23 of the header seal lid 15 mounted to a header by a pump 8 through a vacuum exhaust system 16. Because of this, the presence of the leak hole of the heat transfer pipe group bundled by a tube plate 18 is confirmed by the change in the indication of the pressure gauge 17 mounted to the vacuum exhaust system 16. A reactive membrane 21 reacting with high temp. pressure gas is mounted to the header seal lid 15 at the position corresponding to the open end part of each of the heat transfer pipes provided to the header in a state bundled by support rods 20 and a support grid 22. By observing the reaction of the reaction membrane 21, the presence of the leak heat transfer pipe 16 as well as the leak heat transfer pipe 16 can be detected.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は液体ナトリウムを冷却材に使用する高速増殖炉
のプラントに設置される蒸気発生器伝熱管のリーク伝熱
管検ｕｉ法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a leakage heat transfer tube inspection method for a steam generator heat transfer tube installed in a fast breeder reactor plant that uses liquid sodium as a coolant.

〔発明の技術的背景〕[Technical background of the invention]

蒸気発生器は高速増殖炉において原子炉容器で加熱され
た液体す１−リウムと水とを熱交換させて水蒸気を発生
させる機器である。A steam generator is a device in a fast breeder reactor that generates steam by exchanging heat between liquid sodium heated in a reactor vessel and water.

この蒸気発生器は第３図に示したような構造になってい
る。This steam generator has a structure as shown in FIG.

寸なわち、第３図において、符号１は上下両端が鏡板で
閉塞されている筒状シェルを示しており、　　　　□こ
のシェル１の上部側面には蒸気出口２が設けられ、また
下部側面には給水入口３が設けられている。そして、シ
ェル１の上部側面にはナトリウムの流入口４が設けられ
、下部側面にはナトリウムの流出口５が設けられている
。ざらにシェル１内には複数本の蛇管状伝熱管６が設け
られ、この伝熱管６は一対の上下管板７，８に固定され
ている。That is, in Fig. 3, reference numeral 1 indicates a cylindrical shell whose upper and lower ends are closed with end plates, and a steam outlet 2 is provided on the upper side of this shell 1, and a steam outlet 2 is provided on the lower side. A water supply inlet 3 is provided. A sodium inlet 4 is provided on the upper side of the shell 1, and a sodium outlet 5 is provided on the lower side. Roughly speaking, a plurality of serpentine heat exchanger tubes 6 are provided inside the shell 1, and the heat exchanger tubes 6 are fixed to a pair of upper and lower tube plates 7 and 8.

一対の管板７．８はシェル１内の蒸気出口２および給水
人口３に気密に取着されている。なお、伝熱管６は説明
の繁雑さを避けるため図では１木のみ示しているが、実
際には多数本使用されている。A pair of tube sheets 7.8 are mounted in a gas-tight manner at the steam outlet 2 and the water supply port 3 in the shell 1. Although only one heat exchanger tube 6 is shown in the figure to avoid complication of explanation, a large number of heat exchanger tubes 6 are actually used.

ここで、原子炉で加熱されたナトリウムはナトリウムの
流入口４からシェル１内に流入し下降してナトリウムの
流出口５から流入する。一方、水は給水人口３から流入
し、伝熱管６内を上昇する問にナトリウムと熱交換して
加熱されて過熱蒸気となり、蒸気出口２から流出する。Here, sodium heated in the reactor flows into the shell 1 from the sodium inlet 4, descends, and flows from the sodium outlet 5. On the other hand, water flows in from the water supply port 3, and as it rises in the heat transfer tube 6, it exchanges heat with sodium, is heated, becomes superheated steam, and flows out from the steam outlet 2.

その蒸気は図示してないタービン系へ輸送される。The steam is transported to a turbine system (not shown).

〔背景技術の問題点〕[Problems with background technology]

上述したように高速増殖炉で使用される蒸気発生器では
水とすトリウムとが伝熱管６の壁面を介して熱交換が行
なわれるため、伝熱管６には水とナトリウムとの反応に
よる多くの問題点が生じる。As mentioned above, in the steam generator used in fast breeder reactors, water and thorium exchange heat through the walls of the heat transfer tubes 6, so there is a lot of thorium in the heat transfer tubes 6 due to the reaction between water and sodium. A problem arises.

蒸気発生器の伝熱管６から何らかの原因で水がもれると
ナトリウムと反応する。If water leaks from the heat transfer tube 6 of the steam generator for some reason, it will react with sodium.

Ｎ　ａ　（１ｉｑｕｉｄ）　−４−１−１２０（１ｉｑ
ｕｉｄ）　−＞Ｎ　　ａ　　Ｏト１　　　（ｓｏｌ　　
ｉｄ　　　）　　　十　　　　　　　　　８　２ΔＨ＝
−３５Ｋｃ　ａ　ｌ　／ｍｏ　１これはｌＸ発熱反応で
あり、高圧および高温を発生する。また、反応生成物で
ある苛性ソーダは高温のもとで非常に腐食性がある。N a (1iquid) -4-1-120 (1iq
uid) ->N a Oto1 (sol
id) 10 8 2ΔH=
-35 Kcal/mo 1 This is a lX exothermic reaction, producing high pressures and temperatures. Additionally, the reaction product, caustic soda, is highly corrosive at high temperatures.

この高い腐食性による破損したリーク伝熱管の破損拡大
はもちろんのこと、破損口からナトリウム側へ噴出する
水または蒸気のジェットによる隣接伝熱管の侵食（Ｗａ
ｓｔａａｅ　）による破損拡大に対する考慮も重要とな
る。Not only does this highly corrosive property cause damage to the leaky heat exchanger tube, but also the erosion of adjacent heat exchanger tubes (Wa
It is also important to consider the spread of damage caused by staae).

このため、水リークが検出された後、補修範囲を決定す
るため、リーク伝熱管と隣接伝熱管の検出がおこなわれ
る。Therefore, after a water leak is detected, the leaking heat exchanger tube and adjacent heat exchanger tubes are detected in order to determine the repair range.

伝熱管６から水リークが発生した場合、まずリーク伝熱
管の検出がおこなわれる。When water leaks from the heat exchanger tube 6, the leaky heat exchanger tube is first detected.

現在、リーク伝熱管の検出はＥＣＴ（過ｆｆｉ流探傷試
験）でおこなっている。ＥＣＴとは第４図に示すように
Ｉ　Ｓ　Ｉ　（Ｉｎ−５ｅｒｖｉｃｅ　　Ｉｎ５ｐｅｃ
Ｎｏｎ）装Ｅ１９を作動させ管板８の水側から損傷伝熱
管６内にセンサー導入管１１を使ってセンナ−１０を挿
入し、過電流の作用により、リーク伝熱管を検出する方
法である。Currently, leakage heat exchanger tubes are detected using ECT (excessive ffi current testing). ECT is ISI (In-5service In5pec) as shown in Figure 4.
In this method, the sensor 10 is inserted into the damaged heat exchanger tube 6 from the water side of the tube plate 8 using the sensor introduction tube 11 by activating the equipment E19, and the leakage heat exchanger tube is detected by the action of overcurrent.

しかしながら、上記のように構成されたリーク伝熱管検
出方法では、伝熱管１本１本を伝熱管全長にわたって検
査する必要があり、リーク伝熱管検出にかなりの時間を
要する。このことは損傷伝熱管の検査・補修のためのプ
ラント停止時間を長くし、経済性の観点から非常に問題
となっている。However, in the leaky heat exchanger tube detection method configured as described above, it is necessary to inspect each heat exchanger tube over the entire length of the heat exchanger tube, and it takes a considerable amount of time to detect a leaky heat exchanger tube. This increases plant downtime for inspection and repair of damaged heat exchanger tubes, which is a serious problem from an economic standpoint.

〔発明の目的〕[Purpose of the invention]

本発明は上記問題点を解消するためになされたもので、
リーク伝熱管の検出を短時間におこなうことができる効
率の良いリーク伝熱管検出法を提供することを目的とす
る。The present invention was made to solve the above problems, and
The purpose of the present invention is to provide an efficient method for detecting leaky heat exchanger tubes that can detect leaky heat exchanger tubes in a short time.

〔発明のｍ要〕[Essentials of invention]

すなわち、本発明は、たとえば高速増殖炉のプラントに
使用される蒸気発生器のシェル内のナトリウム空間を高
温ガスで加圧し、蒸気発生器内の伝熱管水側を真空引き
し、その水側空間の圧力上昇を検出するとともに高温ガ
スと反応性のある素材を伝熱管を固定する管板部の伝熱
管近傍に取りつけ、素材の化学反応を検出することを特
徴とするリーク伝熱管検出法である。That is, the present invention pressurizes the sodium space in the shell of a steam generator used in a fast breeder reactor plant with high-temperature gas, evacuates the water side of the heat transfer tube in the steam generator, and evacuates the water side space. This leak heat exchanger tube detection method is characterized by detecting the pressure rise in the heat exchanger tube and detecting the chemical reaction of the material by attaching a material that is reactive with high-temperature gas near the heat exchanger tube in the tube plate section that fixes the heat exchanger tube. .

高温ガスとしてはアンモニアを用いる。Ammonia is used as the high temperature gas.

また、蒸気発生器のシェルに設けられた水蒸気出入口ヘ
ッダに、圧力計、真空引きライン、ナトリウム空間に注
入された高温ガスと反応性のある素材を組みこんだ格子
を備えたヘッダー用シール蓋を取りつけ水側圧力上昇お
よび素材の化学反応を検出することを特徴とするリーク
伝熱管検出法である。In addition, the steam inlet/outlet header installed in the steam generator shell is equipped with a pressure gauge, a vacuum line, and a sealing lid for the header that is equipped with a grid that incorporates a material that is reactive with the high-temperature gas injected into the sodium space. This is a leaky heat exchanger tube detection method characterized by detecting the pressure increase on the attached water side and the chemical reaction of the material.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明に係るリーク伝熱管検出法の一実施例を第
１図および第２図を参照しながら説明する。なお、第１
図中においては第３図と同一部分には同一符号を付して
重複する部分の説明を省略する。Hereinafter, one embodiment of the leakage heat exchanger tube detection method according to the present invention will be described with reference to FIGS. 1 and 2. In addition, the first
In the figure, the same parts as in FIG. 3 are given the same reference numerals, and the explanation of the overlapping parts is omitted.

第１図において、上下両端が鏡板で閉塞されている筒状
シェル１の蒸気出口２、ナトリウムの流出口５をそれぞ
れ盲Ｍ１２，１３で閉塞する。そして、ナトリウムの流
入口４に高部加圧ガス供給系１４を接続し、また、給水
人口３にシール蓋１５を介して真空排気系１６を接続す
る。この真空排気系１６には圧力計１７および真空ポン
プ１８が設けられている。In FIG. 1, a steam outlet 2 and a sodium outlet 5 of a cylindrical shell 1 whose upper and lower ends are closed with mirror plates are closed with blinds M12 and 13, respectively. Then, a high pressurized gas supply system 14 is connected to the sodium inlet 4, and a vacuum exhaust system 16 is connected to the water supply port 3 via a seal lid 15. This evacuation system 16 is provided with a pressure gauge 17 and a vacuum pump 18.

ここで、ガス供給系１４からシェル１内のナトリウムを
ドレンしたナトリウム空間に高温加圧ガスを流入する。Here, high-temperature pressurized gas flows from the gas supply system 14 into the sodium space from which the sodium in the shell 1 has been drained.

高温ガスによってシェル１内に残留しているす１〜リウ
ムは融点以上に保つことができ、伝熱管６にリーク孔が
生じていた場合そのリーク孔がナトリウムによ７て閉塞
されるのを防止することができる。The high-temperature gas can keep the soot remaining in the shell 1 above the melting point, and if a leak hole has formed in the heat transfer tube 6, the leak hole is prevented from being blocked by sodium 7. can do.

そして、伝熱管６内の水をドレンし、真空排気系１６を
接続するが、そのまえに給水人口３の管）　　　　板８
を固定す赫ツダー１シー／Ｌ／！１１５を接続する。シ
ール蓋１５は第２図に拡大して斜視図で示したように富
フランジ１９に支持棒２０を介して反応１１１２１を取
着した支持格子２２が接続されたものからなっている。Then, the water in the heat exchanger tube 6 is drained and the vacuum exhaust system 16 is connected, but before that, the water supply tube 3) plate 8
1 sea/L/ to fix! Connect 115. As shown in the enlarged perspective view of FIG. 2, the sealing lid 15 is made up of a support grid 22 connected to a rich flange 19 via a support rod 20 to which a reactor 11121 is attached.

なお、盲フランジ１９にはノズル２３が接続され、また
ヘッダーに接続するためのボルト孔２４が設けられてい
る。A nozzle 23 is connected to the blind flange 19, and bolt holes 24 for connection to the header are provided.

伝熱管水側は、水をドレンした後、ヘッダーに取りつけ
られたヘッダー用シール！１１５のノズル２３から、真
空排気系１６を通してポンプ１８によって減圧に排気さ
れるので、管板８にたばねらられた伝熱管群にリーク孔
が存在するかは、真空排気系１６に取りつけられた圧力
計１７の指示の変化により確認される。またヘッダー用
シール蓋１５には支持棒２０および支持格子２２により
、ヘッダーにたばねられた各伝熱管の開端部に対応した
位置に前記高温加圧ガスと反応する反応１！２１がとり
つけられているので、その反応膜２１の反応をＩＩＪ察
することにより、リーク伝熱管の有無さらにリーク伝熱
管を、検出することができる。On the water side of the heat transfer tube, the header seal is attached to the header after draining the water! From the nozzle 23 of 115, the pump 18 passes through the vacuum evacuation system 16 and exhausts the air to a reduced pressure. Confirmed by a total of 17 changes in instructions. Further, the header seal lid 15 is equipped with a reaction 1!21 that reacts with the high-temperature pressurized gas at a position corresponding to the open end of each heat transfer tube attached to the header by means of a support rod 20 and a support grid 22. Therefore, by observing the reaction of the reaction film 21, it is possible to detect the presence or absence of a leaky heat exchanger tube as well as the leakage heat exchanger tube.

なお、へ編加圧ガスとしてはたとえばアンモニアを用い
ることが望ましい。Note that it is desirable to use, for example, ammonia as the hemlock pressurizing gas.

〔発明の効果〕〔Effect of the invention〕

本発明によればリーク伝熱管の検出をおこなう際、ヘッ
ダ一単位の伝熱管群でリーク伝熱管の有無を検出できる
。リーク伝熱管の検出は、特定のヘッダ一部の伝熱管に
対してのみＥＣＴを実ｔＭずればよい。また、反応膜の
反応より、リーク伝熱管が検出された際は、前記リーク
伝熱管に対してのみＥＣＴを実施し、リーク位置を決定
すればよい。検出を従来より効率よくおこなう検出方法
を提供することができる。このためリーク伝熱管の検出
・補修に対する作業時間が大幅に短縮され、作業内容も
容易になる。このことは、検査・補修に対する大幅なコ
スト・ダウンを意味し、経済性の面から、非常に有効で
ある。According to the present invention, when detecting a leaky heat exchanger tube, the presence or absence of a leaky heat exchanger tube can be detected using a group of heat exchanger tubes in one header unit. To detect a leaky heat exchanger tube, it is sufficient to shift the ECT by actual tM only for some heat exchanger tubes of a specific header. Further, when a leaky heat transfer tube is detected from the reaction of the reaction membrane, ECT may be performed only on the leaky heat transfer tube to determine the leak position. A detection method that performs detection more efficiently than conventional methods can be provided. As a result, the time required to detect and repair leaky heat exchanger tubes is significantly reduced, and the work content becomes easier. This means a significant cost reduction for inspection and repair, and is very effective from an economic standpoint.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係るリーク伝熱管検出法の一実施例を
説明するための概略的系統図、第２図は第１図における
シール蓋を示す斜視図、第３図は蒸気発生器を示す概略
的断面図、第４図は第３図における伝熱管のリーク伝熱
管検出法を一部ブロック的に示す部分的断面図である。 １・・・シェル、２・・・蒸気出口、３・・・給水入口
、４・・・ナトリウムの流入口、５・・・ナトリウムの
流出口、６・・・伝熱管、７・・・上管板、８・・・下
管板、９・・−Ｉｓ■装置、１０・・・センサ、１１・
・・センサ導入管、１２．１３・・・盲蓋、１４・・・
高温加圧ガス供給系、１５・・・シール蓋、１６・・・
真空排気系、１７・・・圧力計、１８・・・真空ポンプ
、１９・・・盲フランジ、２０・・・支持棒、２１・・
・反応膜、２２・・・支持格子、２３・・・ノズル、２
４・・・ボルト孔。 代理人弁理士　　則　近　憲　佑（ほか１名）′ｉ。 第１図 第２図 第３図 第４図Fig. 1 is a schematic system diagram for explaining one embodiment of the leak heat exchanger tube detection method according to the present invention, Fig. 2 is a perspective view showing the seal lid in Fig. 1, and Fig. 3 is a diagram showing the steam generator. FIG. 4 is a partial cross-sectional view partially showing a method for detecting leakage heat exchanger tubes in FIG. 3 in block form. DESCRIPTION OF SYMBOLS 1...Shell, 2...Steam outlet, 3...Water supply inlet, 4...Sodium inlet, 5...Sodium outlet, 6...Heat transfer tube, 7...Top Tube plate, 8...Lower tube plate, 9...-Is ■ device, 10... Sensor, 11...
...Sensor introduction pipe, 12.13...Blind lid, 14...
High temperature pressurized gas supply system, 15... Seal lid, 16...
Vacuum exhaust system, 17... Pressure gauge, 18... Vacuum pump, 19... Blind flange, 20... Support rod, 21...
- Reaction membrane, 22... Support grid, 23... Nozzle, 2
4...Bolt hole. Representative Patent Attorney Noriyuki Chika (and 1 other person)'i. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】 １、シェル内に上下両管板を介して複数の伝熱管が設け
られ前記シェル内をナトリウム空間とし、かつ前記伝熱
管内を水側として前記ナトリウム側空間を高温ガスで加
圧し、かつ前記伝熱管水側を真空引きし、前記高温ガス
と反応性のある素材を前記伝熱管を固定する管板部の伝
熱管近傍に取りつけ、素材の化学反応を検出することを
特徴とするリーク伝熱管検出法。 ２、高温ガスにはアンモニアを用いることを特徴とする
特許請求の範囲第１項記載のリーク伝熱管検出法。 ３、水蒸気出入口ヘッダーに圧力計、真空引きライン、
ナトリウム空間に注入された高温ガスと反応性のある素
材を組みこんだ格子を備えたヘッダー用シール蓋を取り
つけ、水側の圧力上昇および素材の化学反応を検出する
ことを特徴とする特許請求の範囲第１項記載のリーク伝
熱管検出法。[Claims] 1. A plurality of heat transfer tubes are provided inside the shell via upper and lower tube plates, the inside of the shell is a sodium space, and the inside of the heat transfer tube is a water side, and the sodium side space is filled with high temperature gas. It is characterized by pressurizing and evacuating the water side of the heat transfer tube, attaching a material reactive with the high temperature gas near the heat transfer tube on a tube plate portion that fixes the heat transfer tube, and detecting a chemical reaction of the material. A leaky heat exchanger tube detection method. 2. The leak heat exchanger tube detection method according to claim 1, characterized in that ammonia is used as the high temperature gas. 3. Pressure gauge, vacuum line on steam inlet/outlet header,
The patent claims include a header sealing lid with a grid incorporating a material reactive with the hot gas injected into the sodium space to detect pressure increases on the water side and chemical reactions of the material. A method for detecting a leaky heat exchanger tube according to scope 1.
JP60109295A 1985-05-23 1985-05-23 Method for detecting leak heat transfer pipe Pending JPS61269035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60109295A JPS61269035A (en) 1985-05-23 1985-05-23 Method for detecting leak heat transfer pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60109295A JPS61269035A (en) 1985-05-23 1985-05-23 Method for detecting leak heat transfer pipe

Publications (1)

Publication Number Publication Date
JPS61269035A true JPS61269035A (en) 1986-11-28

Family

ID=14506553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60109295A Pending JPS61269035A (en) 1985-05-23 1985-05-23 Method for detecting leak heat transfer pipe

Country Status (1)

Country Link
JP (1) JPS61269035A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7543983B2 (en) * 2005-12-30 2009-06-09 Hon Hai Precision Industry Co., Ltd. Device for measuring temperature of heat pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7543983B2 (en) * 2005-12-30 2009-06-09 Hon Hai Precision Industry Co., Ltd. Device for measuring temperature of heat pipe

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