JP2008039661A - Thermoelectric thermometer - Google Patents

Thermoelectric thermometer Download PDF

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JP2008039661A
JP2008039661A JP2006216499A JP2006216499A JP2008039661A JP 2008039661 A JP2008039661 A JP 2008039661A JP 2006216499 A JP2006216499 A JP 2006216499A JP 2006216499 A JP2006216499 A JP 2006216499A JP 2008039661 A JP2008039661 A JP 2008039661A
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opening
socket
end surface
protective tube
tube
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Nobuaki Nishibayashi
宣顕 西林
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NISHIBAYASHI DENKI SEISAKUSHO
NISHIBAYASHI DENKI SEISAKUSHO KK
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NISHIBAYASHI DENKI SEISAKUSHO
NISHIBAYASHI DENKI SEISAKUSHO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoelectric thermometer which prevents high-temperature gas which has entered a pipe caused by breaks in a protective pipe and an insulating pipe, from leaking outside a furnace. <P>SOLUTION: The thermoelectric thermometer 10 comprises the terminal body 11, a socket 12, the protective pipe 13, the insulating pipe 14 housed in the protective pipe 13, and a thermocouple 15 housed in the insulating pipe 14. The thermoelectric thermometer 10 is used while being installed on a furnace wall 35 so that the tip of the protective pipe 13 from the socket 12 is exposed to the inside of the furnace. A proximal-end-face opening 13b of the protective pipe 13 is blocked with a silicone-rubber-made stopper 20, having thermal resistance and elasticity. The insulating pipe 14 is inserted into a central hole 21 provided in the stopper 20 in an airtight manner, and a proximal-end opening 14b of the insulating pipe 14 is blocked with a sealant 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、熱電対を利用した熱電形温度計に関し、より詳しくは焼成炉のような高温雰囲気中での使用に好適な熱電形温度計に関する。   The present invention relates to a thermoelectric thermometer using a thermocouple, and more particularly to a thermoelectric thermometer suitable for use in a high temperature atmosphere such as a firing furnace.

熱電形温度計の一形式として、特開平６−３２３９１９号公報には自動注湯炉の流湯部等に用いるに好適な熱電形温度計の構造が開示されている。この温度計は先端面と基端面に開口を有し基端部をターミナル本体に着脱可能に接続したソケットと、基端面に開口を有し、基端部をソケットの先端面開口から挿入してソケットに装着した保護管と、基端面に開口を有し、前記保護管内に収納されるとともに、基端部を保護管の基端面開口からターミナル本体内まで突出した絶縁管と、絶縁管に収納された熱電対と、中心穴を有し、前記ソケットの基端面開口に装着して該開口を塞ぐととも中心穴に前記絶縁管の突出端部が貫入された金属製の栓体とを備えている。   As one type of thermoelectric thermometer, Japanese Patent Laid-Open No. 6-323919 discloses a structure of a thermoelectric thermometer suitable for use in a flowing hot water portion of an automatic pouring furnace. This thermometer has an opening in the distal end surface and the proximal end surface, and a socket in which the proximal end portion is detachably connected to the terminal body, an opening in the proximal end surface, and the proximal end portion is inserted from the distal end opening of the socket. A protective tube attached to the socket, having an opening at the base end surface, housed in the protective tube, and an insulating tube projecting from the base end surface opening of the protective tube into the terminal body, and housed in the insulating tube A thermocouple and a metal plug having a center hole, which is attached to the base end opening of the socket and closes the opening, and the projecting end of the insulating tube is inserted into the center hole. ing.

かかる構造の熱電形温度計によれば、何らかの理由で保護管が破損したとき、絶縁管を伝ってターミナル本体側へ流れる溶湯は金属栓とソケットの隙間を流れる間に凝固するので、ターミナル本体から炉外部に流出するのを防止できる。
特開平６−３２３９１９号公報 According to the thermoelectric thermometer having such a structure, when the protective tube is broken for some reason, the molten metal flowing to the terminal body side through the insulating tube solidifies while flowing through the gap between the metal plug and the socket. It can be prevented from flowing out of the furnace.
JP-A-6-323919

しかしながら、上記した従来の熱電形温度計を焼成炉等の高温雰囲気中で使用した場合、保護管が破損すると、炉内の高温ガスが金属栓とソケットの隙間を通ってターミナル本体から炉外へ漏出する。また、保護管だけでなく絶縁管までも破損した場合、絶縁管の基端部から高温ガスが炉外へ漏出するおそれがある。   However, when the above-described conventional thermoelectric thermometer is used in a high-temperature atmosphere such as a firing furnace, when the protective tube is damaged, the high-temperature gas in the furnace passes through the gap between the metal plug and the socket and moves from the terminal body to the outside of the furnace. Leak. Further, when not only the protective tube but also the insulating tube is damaged, high temperature gas may leak out of the furnace from the base end portion of the insulating tube.

本発明はかかる問題点に鑑み、保護管や絶縁管の破損事故により管内に侵入した高温ガスが炉外へ漏出しないようにした熱電形温度計を提供することを目的とする。   In view of such problems, an object of the present invention is to provide a thermoelectric thermometer that prevents high-temperature gas that has entered a pipe due to a breakage accident of a protective pipe or an insulating pipe from leaking out of the furnace.

上記目的を達成するため、請求項１に係る熱電形温度計は、先端面と基端面に開口を有し基端部をターミナル本体に着脱可能に接続したソケットと、基端面に開口を有し、基端部をソケットの先端面開口から挿入してソケットに装着した保護管と、基端面に開口を有し、前記保護管内に収納されるとともに、基端部を保護管の基端面開口からターミナル本体内まで突出した絶縁管と、絶縁管に収納された熱電対と、中心穴を有し、前記ソケットの基端面開口に気密に嵌着して該開口を塞ぐととも中心穴に前記絶縁管の突出端部が気密に貫入された耐熱性と弾性を有する栓体と、前記絶縁管の基端面開口を気密に閉塞するシール材とを備えたことを特徴とする。   In order to achieve the above object, a thermoelectric thermometer according to claim 1 has a socket having an opening at a distal end surface and a proximal end surface and a base end portion removably connected to a terminal body, and an opening at a proximal end surface. A protective tube inserted into the socket by inserting the proximal end portion from the opening of the distal end surface of the socket; an opening in the proximal end surface; and being accommodated in the protective tube, and the proximal end portion from the proximal end surface opening of the protective tube An insulating tube protruding into the terminal body, a thermocouple housed in the insulating tube, and a center hole. The center hole is hermetically fitted to the opening of the base end surface of the socket, and the opening is closed. A plug having heat resistance and elasticity in which a protruding end portion of a tube is hermetically penetrated, and a sealing material for hermetically closing a base end surface opening of the insulating tube are provided.

そして、好ましくは、前記ソケットと前記保護管との隙間にシール材を装着する。   Preferably, a seal material is attached to a gap between the socket and the protective tube.

請求項１に記載の熱電形温度計によれば、耐熱性と弾性を有する栓体で保護管の基端面開口を塞ぐとともに、同栓体の中心穴に絶縁管を気密に挿入し、かつ絶縁管の基端面開口をシール材で塞いだので、保護管や絶縁管が破損しても、これらの管を通って高温ガスが炉外へ漏出するのを防止できる。   According to the thermoelectric thermometer according to claim 1, the base end face opening of the protective tube is closed with a heat-resistant and elastic plug body, and the insulating tube is hermetically inserted into the central hole of the plug body, and is insulated. Since the base end face opening of the tube is closed with the sealing material, even if the protective tube or the insulating tube is broken, it is possible to prevent the high temperature gas from leaking out of the furnace through these tubes.

また、絶縁管の基部が弾性を有する栓体で支持されるので、絶縁管の振動により熱電対を構成する素線が切断するのを防止できる。さらにまた、熱電形温度計を垂直に取り付ける場合、絶縁管の自重が栓体で支持されるので、素線に絶縁管の自重が加わることにより素線が断線するのを防止できる。このため、白金等の貴金属からなる素線を可及的に細くして使用量を少なくできるので、製造コストの低減が可能となる。   Further, since the base portion of the insulating tube is supported by an elastic plug, it is possible to prevent the strands constituting the thermocouple from being cut by the vibration of the insulating tube. Furthermore, when the thermoelectric thermometer is mounted vertically, the dead weight of the insulating tube is supported by the plug, so that it is possible to prevent the strand from being disconnected by adding the own weight of the insulating tube to the strand. For this reason, since the amount of use can be reduced by making the wire made of a noble metal such as platinum as thin as possible, the manufacturing cost can be reduced.

ソケットと保護管との隙間にＯリング等のシール材を装着することにより、より確実に高温ガスが破損した保護管を通って炉外へ漏出するのを防止できる。   By installing a sealing material such as an O-ring in the gap between the socket and the protective tube, it is possible to more reliably prevent the high temperature gas from leaking out of the furnace through the damaged protective tube.

以下に本発明の第１実施例を図面に基づき説明する。
図１は第１実施例に係る熱電形温度計の断面図であり、図２は同じく熱電形温度計の部分拡大断面図である。 A first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view of a thermoelectric thermometer according to the first embodiment, and FIG. 2 is a partially enlarged cross-sectional view of the thermoelectric thermometer.

本実施例の熱電形温度計１０はターミナル本体１１、ソケット１２、保護管１３、保護管１３に収納された絶縁管１４、絶縁管１４に収納された熱電対１５を備えている。ターミナル本体１１は先端に筒部１６を設けた中空構造を有し、筒部１６の内周面に雌ネジ１７ａが形成されている。また、ターミナル本体１１の底面開口はベースプレート１８で覆蓋され、ベースプレート１８の外面にターミナル１９が設けられている。   The thermoelectric thermometer 10 of this embodiment includes a terminal main body 11, a socket 12, a protective tube 13, an insulating tube 14 accommodated in the protective tube 13, and a thermocouple 15 accommodated in the insulating tube 14. The terminal body 11 has a hollow structure in which a cylindrical portion 16 is provided at the tip, and a female screw 17 a is formed on the inner peripheral surface of the cylindrical portion 16. The bottom opening of the terminal body 11 is covered with a base plate 18, and a terminal 19 is provided on the outer surface of the base plate 18.

ソケット１２は両端面を開口にした筒構造を有し、基端部１２ａ外周面に雄ネジ１７ｂが形成されている。ソケット１２は基端部１２ａをターミナル本体１１の筒部１６にネジ込むことによりターミナル本体１１に着脱可能に取り付けられている。   The socket 12 has a cylindrical structure with both end surfaces opened, and a male screw 17b is formed on the outer peripheral surface of the base end portion 12a. The socket 12 is detachably attached to the terminal main body 11 by screwing the base end portion 12 a into the cylindrical portion 16 of the terminal main body 11.

ソケット１２の基端面開口１２ｂには栓体２０が圧入されている。この栓体２０は耐熱性と弾性を有する材料、例えばシリコンゴムから成り、中心穴２１が貫通して形成されている。   A plug 20 is press-fitted into the base end surface opening 12 b of the socket 12. The plug body 20 is made of a material having heat resistance and elasticity, for example, silicon rubber, and has a central hole 21 formed therethrough.

保護管１３は先端面１３ｃが閉塞され、基端面は開口１３ｂに形成されている。保護管１３はソケット１２の内径より若干小さい外径を有し、ソケット１２の先端面開口１２ｃからソケット１２中に挿入されている。そして、保護管１３の基端部１３ａにはＯリング２２とグラスファイバー２３が装着され、さらに、ソケット１２と保護管１３の基端部１３ａの隙間に固定部材としてアルミナセメント２４が充填されている。保護管１３は、Ｏリング２２により気密にソケット１２に装着され、かつ、グラスファイバー２３とアルミナセメント２４によりソケット１２に固定されている。   The protective tube 13 has a distal end surface 13c closed and a proximal end surface formed in an opening 13b. The protective tube 13 has an outer diameter slightly smaller than the inner diameter of the socket 12, and is inserted into the socket 12 from the front end surface opening 12 c of the socket 12. An O-ring 22 and a glass fiber 23 are attached to the base end portion 13a of the protective tube 13, and an alumina cement 24 is filled as a fixing member in a gap between the socket 12 and the base end portion 13a of the protective tube 13. . The protective tube 13 is attached to the socket 12 in an airtight manner by an O-ring 22, and is fixed to the socket 12 by a glass fiber 23 and an alumina cement 24.

絶縁管１４は保護管１３内に収納され、その基部１４ａが保護管１３の基端面開口１３ｂから突出している。そして、突出端部１４ｂは栓体２０の中心穴２１に圧入され、中心穴２１を貫通してターミナル本体１１内に突出している。   The insulating tube 14 is accommodated in the protective tube 13, and its base portion 14 a protrudes from the proximal end surface opening 13 b of the protective tube 13. The protruding end portion 14 b is press-fitted into the central hole 21 of the plug body 20, penetrates the central hole 21 and protrudes into the terminal body 11.

熱電対１５は絶縁管１４の突出端部の開口１４ｂからその素線１５ａが導出され、ターミナル１９に連結されている。また、絶縁管１４の突出端部開口１４ｂはシール材２５で気密に閉塞されている。このシール材２５には液状シリコンを塗布し、凝固させたものが使用されている。   The thermocouple 15 is connected to a terminal 19 through a wire 15 a derived from the opening 14 b at the protruding end of the insulating tube 14. Further, the protruding end opening 14 b of the insulating tube 14 is airtightly closed with a sealing material 25. The sealing material 25 is made of liquid silicon coated and solidified.

本実施例に係る熱電形温度計１０の構造は以上の通りであって、図１に示すように、ソケット１２から先の保護管１３を炉内に露出するように炉壁３５に設置して使用される。
しかして、本実施例に係る熱電形温度計１０は、耐熱性と弾性を有するシリコンゴム製栓体２０で保護管１３の基端面開口１３ｂを塞ぐとともに、同栓体２０の中心穴２１に絶縁管１４を気密に挿入し、かつ絶縁管１４の突出端部開口１４ｂをシール材２５で塞いだので、炉内で保護管１３や絶縁管１４が破損しても、これらの管１３，１４を通って炉内の高温ガスが炉外へ漏出するのを防止できる。 The structure of the thermoelectric thermometer 10 according to the present embodiment is as described above. As shown in FIG. 1, the thermotube thermometer 10 is installed on the furnace wall 35 so that the protective tube 13 from the socket 12 is exposed in the furnace. used.
Thus, the thermoelectric thermometer 10 according to the present embodiment closes the base end face opening 13b of the protective tube 13 with a heat-resistant and elastic silicone rubber plug body 20, and insulates the central hole 21 of the plug body 20. Since the tube 14 is inserted in an airtight manner and the protruding end opening 14b of the insulating tube 14 is closed with the sealing material 25, even if the protective tube 13 and the insulating tube 14 are damaged in the furnace, the tubes 13 and 14 are It is possible to prevent the hot gas in the furnace from leaking out through the furnace.

また、絶縁管１４の基部１４ａが弾性を有するシリコンゴム製栓体２０で支持されるので、絶縁管１４の振動により熱電対１５を構成する素線１５ａが切断するのを防止できる。さらにまた、熱電形温度計１０を垂直に取り付ける場合、絶縁管１４の自重が栓体２０で支持されるので、素線１５ａに絶縁管１４の自重が加わることにより素線１５ａが断線するのを防止できる。このため、白金等の貴金属からなる素線１５ａを可及的に細くして使用量を少なくできるので、製造コストの低減が可能となる。   Further, since the base portion 14a of the insulating tube 14 is supported by the elastic silicon rubber plug body 20, it is possible to prevent the strand 15a constituting the thermocouple 15 from being cut by the vibration of the insulating tube 14. Furthermore, when the thermoelectric thermometer 10 is mounted vertically, the dead weight of the insulating tube 14 is supported by the plug body 20, so that the strand 15 a is disconnected by adding the own weight of the insulating tube 14 to the strand 15 a. Can be prevented. For this reason, since the strand 15a which consists of noble metals, such as platinum, can be made as thin as possible, and the usage-amount can be reduced, it becomes possible to reduce manufacturing cost.

ソケット１２と保護管１３との隙間にＯリング２２を装着したので、破損した保護管１３を通って炉外へ高温ガスが漏出するのをより確実に防止できる。   Since the O-ring 22 is mounted in the gap between the socket 12 and the protective tube 13, it is possible to more reliably prevent high temperature gas from leaking out of the furnace through the damaged protective tube 13.

ソケット１２と保護管１３との隙間にアルミナセメント２４とグラスファイバー２２を介在させて保護管１３をソケット１２に固定したので、保護管１３の振動、ひいては絶縁管１４の振動を防止できる。従って、絶縁管１４の振動による熱電対素線１５ａの破断をより効果的に防止できる。   Since the protective tube 13 is fixed to the socket 12 with the alumina cement 24 and the glass fiber 22 interposed between the socket 12 and the protective tube 13, the vibration of the protective tube 13 and hence the insulating tube 14 can be prevented. Therefore, breakage of the thermocouple wire 15a due to vibration of the insulating tube 14 can be more effectively prevented.

本発明の実施例に係る熱電形温度計の断面図である。It is sectional drawing of the thermoelectric thermometer which concerns on the Example of this invention. 本発明の実施例に係る熱電形温度計の基部付近の部分拡大断面図である。It is a partial expanded sectional view of base vicinity of the thermoelectric thermometer which concerns on the Example of this invention.

符号の説明Explanation of symbols

１０…熱電形温度計、
１１…ターミナル本体、
１２…ソケット、１２ａ…ソケット基端部、１２ｂ…ソケット基端面開口、１２ｃ…ソケット先端面開口、
１３…保護管、１３ａ…保護管基端部、１３ｂ…保護管基端面開口、１３ｃ…保護管先端面内側、
１４…絶縁管、１４ａ…絶縁管基部、１４ｂ…絶縁管突出端部開口、
１５…熱電対、１５ａ…素線、１５ｂ…温接点、
１６…筒部、
１７ａ…雌ネジ、１７ｂ…雄ネジ、
１８…ベースプレート、
１９…ターミナル、
２０…栓体、２１…中心穴、２２…Ｏリング、２３…グラスファイバー、２４…アルミナセメント、２５…シール材、
３５…炉壁
10 ... Thermoelectric thermometer,
11 ... Terminal body,
12 ... Socket, 12a ... Socket proximal end, 12b ... Socket proximal end opening, 12c ... Socket distal end opening,
13 ... Protective tube, 13a ... Protective tube base end, 13b ... Protective tube base end surface opening, 13c ... Protective tube distal end inner side,
14 ... Insulating tube, 14a ... Insulating tube base, 14b ... Insulating tube protruding end opening,
15 ... Thermocouple, 15a ... Wire, 15b ... Hot junction,
16 ... Cylinder part,
17a ... female screw, 17b ... male screw,
18 ... Base plate,
19 ... Terminal,
20 ... Plug body, 21 ... Center hole, 22 ... O-ring, 23 ... Glass fiber, 24 ... Alumina cement, 25 ... Sealing material,
35 ... Furnace wall

Claims (2)

先端面と基端面に開口を有し基端部をターミナル本体に着脱可能に接続したソケットと、基端面に開口を有し、基端部をソケットの先端面開口から挿入してソケットに装着した保護管と、基端面に開口を有し、前記保護管内に収納されるとともに、基端部を保護管の基端面開口からターミナル本体内まで突出した絶縁管と、絶縁管に収納された熱電対と、中心穴を有し、前記ソケットの基端面開口に気密に嵌着して該開口を塞ぐととも中心穴に前記絶縁管の突出端部が気密に貫入された耐熱性と弾性を有する栓体と、前記絶縁管の基端面開口を気密に閉塞するシール材とを備えたことを特徴とする熱電形温度計。   A socket having an opening on the distal end surface and a proximal end surface and a base end portion removably connected to the terminal body, and an opening on the proximal end surface, the proximal end portion being inserted from the distal end surface opening of the socket and attached to the socket A protective tube, an insulating tube having an opening in the base end surface and housed in the protective tube, the base end projecting from the base end surface opening of the protective tube into the terminal body, and a thermocouple housed in the insulating tube And a heat-resistant and elastic plug having a center hole, hermetically fitted to the opening of the base end surface of the socket and closing the opening, and the protruding end of the insulating tube being hermetically penetrated into the center hole. A thermoelectric thermometer comprising: a body; and a sealing material that hermetically closes a base end face opening of the insulating tube. 前記ソケットと前記保護管との隙間にシール材を装着することを特徴とする請求項１に記載の熱電形温度計。
The thermoelectric thermometer according to claim 1, wherein a sealing material is attached to a gap between the socket and the protective tube.
JP2006216499A 2006-08-09 2006-08-09 Thermoelectric thermometer Pending JP2008039661A (en)

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Publication number Priority date Publication date Assignee Title
CN102879118A (en) * 2012-10-26 2013-01-16 北京机械设备研究所 Temperature sensor for preventing pressure leakage
CN104155014A (en) * 2014-08-20 2014-11-19 浙江泰索科技有限公司 Temperature sensor

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JPH10260085A (en) * 1997-03-17 1998-09-29 Kawasou Denki Kogyo Kk Building-in construction of temperature measuring element for temperature measuring device

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JPH06102101A (en) * 1992-08-05 1994-04-15 Shinagawa Refract Co Ltd Temperature sensor and method for measuring temperature with the sensor
JPH06323919A (en) * 1992-10-09 1994-11-25 Fuji Electric Co Ltd Temperature measuring device of molten metal
JPH0653940U (en) * 1992-12-24 1994-07-22 株式会社イナックス Thermocouple deterioration prevention structure in molten metal continuous temperature measuring device
JPH10260085A (en) * 1997-03-17 1998-09-29 Kawasou Denki Kogyo Kk Building-in construction of temperature measuring element for temperature measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102879118A (en) * 2012-10-26 2013-01-16 北京机械设备研究所 Temperature sensor for preventing pressure leakage
CN104155014A (en) * 2014-08-20 2014-11-19 浙江泰索科技有限公司 Temperature sensor

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