JPH09297068A - Manufacture of temperature detecting end - Google Patents
Manufacture of temperature detecting endInfo
- Publication number
- JPH09297068A JPH09297068A JP13570096A JP13570096A JPH09297068A JP H09297068 A JPH09297068 A JP H09297068A JP 13570096 A JP13570096 A JP 13570096A JP 13570096 A JP13570096 A JP 13570096A JP H09297068 A JPH09297068 A JP H09297068A
- Authority
- JP
- Japan
- Prior art keywords
- thermocouple
- protective tube
- tip
- protecting tube
- tube
- 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.)
- Granted
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高熱炉の温度を測
定するための熱電対を用いた温度検出端の製造方法に関
する。The present invention relates to a method for manufacturing a temperature detecting end using a thermocouple for measuring the temperature of a blast furnace.
【０００２】[0002]
【従来の技術】従来の熱電対を用いた温度検出端の製造
方法は、熱電対を挿入する前の保護管は既にその先端が
封じられた状態で製造されており、その先端が封じられ
た保護管の中にあとから熱電対を挿入して温度検出端を
製造していた。また、保護管が曲がった温度検出端を製
造するときは、あらかじめ先端が封じられた直管状の石
英パイプに熱電対を挿入した後、石英パイプを所定の位
置で加熱し所定の曲げ半径で加熱曲げ加工していた。2. Description of the Related Art In a conventional method for manufacturing a temperature detecting end using a thermocouple, a protective tube before a thermocouple is inserted is manufactured with its tip already sealed, and the tip is sealed. A thermocouple was later inserted into the protective tube to manufacture the temperature detecting end. When manufacturing a temperature detecting end with a bent protective tube, insert a thermocouple into a straight tubular quartz pipe whose tip is sealed in advance, then heat the quartz pipe at a predetermined position and heat it at a predetermined bending radius. It was bending.
【０００３】[0003]
【発明が解決しようとする課題】従来の温度検出端の製
造方法は上述したとおりの構成であって、保護管が直管
状のものであるときは保護管の後端部を切断することに
より種々の寸法の保護管を比較的容易に調達することが
できた。しかし、保護管がＬ字形のようにある角度で曲
がっているものを製造するときに、既に形成された先端
封じの保護管のＬの縦方向の長さは後端部を切断すれば
寸法を変更できるが、横方向の長さを変更することは不
可能である。横方向の寸法が異なる幾種類もの保護管を
製造するためにあらかじめ同一の規格品を製造して、あ
とから保護管の横方向部分を所定の長さに切断する方法
は、先端封じの保護管では横方向の長さを変更できない
ので採用することができない。したがって、従来の製造
方法では横方向の寸法ごとに異なった規格のものを別々
に製造しなければならないのでコストがかさみ、多数の
寸法のものを在庫として用意しなければならないという
欠点があった。The conventional method of manufacturing the temperature detecting end is as described above, and when the protective tube is a straight tube, various methods are provided by cutting the rear end of the protective tube. A protective tube having the following dimensions could be procured relatively easily. However, when manufacturing a protective tube bent at an angle such as an L-shape, the longitudinal length of the L of the protective tube of the front end sealing already formed is reduced by cutting the rear end. It can be changed, but it is not possible to change the lateral length. In order to manufacture various types of protection tubes with different lateral dimensions, the same standard product is manufactured in advance, and then the lateral part of the protection tube is cut to a specified length. However, since the horizontal length cannot be changed, it cannot be adopted. Therefore, in the conventional manufacturing method, it is necessary to separately manufacture products having different standards for each dimension in the lateral direction, so that the cost is increased, and there are disadvantages that a large number of sizes must be prepared as stock.
【０００４】また、前述した直管状の石英パイプに熱電
対を挿入してから所定の位置と曲げ半径で加熱曲げ加工
する方法では、石英パイプの内部に熱電対が既に挿入さ
れているので、加熱曲げ加工の状況の変化の影響を受け
て製品の精度が出しにくく、更に熱電対をかなり高温に
さらすことになるから精度の低下を来す虞がある。本発
明は、一種類の保護管を用意することにより、簡単な作
業でＬ字形の横方向の寸法が異なる保護管を調達するこ
とができる温度検出端を製造するとともに、保護管の曲
がった温度検出端を製造するときに保護管の曲げ加工の
状況変化の影響を受けず、且つ曲げ加工の際に熱電対が
高温にさらされることなく、精度の高い製品を供給する
ことを課題とする。In the above-described method in which a thermocouple is inserted into a straight tubular quartz pipe and then heated and bent at a predetermined position and a bending radius, the thermocouple is already inserted inside the quartz pipe. The accuracy of the product is hardly obtained due to the influence of the change of the bending process, and the thermocouple is exposed to a considerably high temperature, so that the accuracy may be reduced. According to the present invention, by preparing one kind of protection tube, a temperature detecting end capable of procuring L-shaped protection tubes having different lateral dimensions by a simple operation can be manufactured, and the bent temperature of the protection tube can be obtained. An object of the present invention is to supply a highly accurate product without being affected by a change in the state of bending of a protective tube when manufacturing a detection end and without exposing a thermocouple to high temperatures during bending.
【０００５】また、従来の保護管は最初からその先端が
封じられた状態で製造され供給されたので、その保護管
の中に熱電対を挿入する場合、熱電対は絶縁部材でカバ
−されその絶縁部材の多くは磁器製の碍子であるから、
挿入ミスにより熱電対の先端の碍子が保護管の封じられ
た先端に突き当たったときにその部分を突き破る虞があ
り、このような虞を除去することをもう一つの課題とす
る。Further, since the conventional protection tube is manufactured and supplied with the tip sealed from the beginning, when inserting the thermocouple into the protection tube, the thermocouple is covered with an insulating member. Most of the insulating members are porcelain insulators,
When the insulator at the distal end of the thermocouple collides with the sealed distal end of the protective tube due to an insertion error, there is a possibility that the insulator may break through that portion. Another object is to eliminate such a fear.
【０００６】[0006]
【課題を解決するための手段】本発明の課題を解決する
ための手段としての請求項１記載の方法は、先端が開放
されている保護管をあらかじめ製造しておき、その保護
管内に、熱電対の先端が保護管を封じる予定位置の手前
に達するまで熱電対を挿入し、熱電対がその位置から更
に進入し又は後退することがないように熱電対を保護管
に対して相対的に固定した後、熱電対の先端よりも先方
の位置で保護管を封じることを特徴とする。According to the method of claim 1 as a means for solving the problems of the present invention, a protection tube having an open tip is manufactured in advance, and a thermoelectric tube is provided in the protection tube. Insert the thermocouple until the tip of the pair reaches just before the position where the protection tube is to be sealed, and fix the thermocouple relative to the protection tube so that the thermocouple does not enter or retract further from that position. After that, the protection tube is sealed at a position ahead of the tip of the thermocouple.
【０００７】請求項２記載の方法は請求項１記載の方法
を更に具体化したもので、保護管を封じる部分を加熱し
てその加熱された部分を引き伸ばし、加熱部分の温度が
下がってその部分が硬化した後にその部分を切断し、切
断された保護管端部の破片は廃棄し、保護管の切断端部
を徐々に加熱することにより保護管を封じることを特徴
とする。According to a second aspect of the present invention, the method of the first aspect is further embodied. The portion for sealing the protective tube is heated and the heated portion is stretched so that the temperature of the heated portion decreases and the portion is heated. After hardening, the part is cut, the fragment of the cut end of the protective tube is discarded, and the protective tube is sealed by gradually heating the cut end of the protective tube.
【０００８】[0008]
【発明の実施の形態】次に本発明の実施の形態を説明す
る。この実施の形態で使用される保護管は石英で断面が
円形に形成されたものである。あらかじめＬ字形に曲げ
られ先端が開放された保護管の内部に熱電対が挿入され
る。熱電対は熱電対同士を隔離するための絶縁部材であ
る碍子の中に挿通されていて、碍子は小さく形成された
ものを多数並べてあるので熱電対は自由に曲がることが
できる。したがって、あらかじめＬ字形に曲げられた保
護管の中に、後から熱電対を挿入することができるので
ある。BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. The protection tube used in this embodiment is made of quartz and has a circular cross section. A thermocouple is inserted into the inside of a protective tube which has been bent into an L-shape and has an open end. The thermocouple is inserted into an insulator serving as an insulating member for isolating the thermocouples from each other. Since the insulator is formed by arranging a number of small insulators, the thermocouple can be freely bent. Therefore, a thermocouple can be inserted later into the protective tube bent in advance into an L-shape.
【０００９】熱電対を保護管に挿入するときは、熱電対
の先端が保護管を封じる予定位置の手前に達するまでＬ
字形に曲がった保護管内に熱電対を挿入する。したがっ
て、熱電対の先端が保護管の開放された端部から突出す
ることはない。保護管に挿入された熱電対はその位置か
ら更に保護管内に進入し又は後退することがないよう
に、熱電対を保護管に対して相対的に移動不能に固定す
る。When inserting the thermocouple into the protective tube, L is inserted until the tip of the thermocouple reaches a position before the planned position of sealing the protective tube.
Insert the thermocouple into the protective tube bent in the shape of a letter. Therefore, the tip of the thermocouple does not protrude from the open end of the protection tube. The thermocouple is fixed immovably relative to the protection tube so that the thermocouple inserted into the protection tube does not further enter or retract from the protection tube from that position.
【００１０】例えば保護管の先端から３〜５センチメ−
トル離れた位置で切断して封じる方法では、保護管を旋
盤用回転治具に保持させ、保護管の端部を垂直に通る軸
線を中心として保護管を回転させながら、酸水素バ−ナ
−を使用して保護管の端部から３〜５センチメ−トルの
部分を加熱する。保護管の加熱部分が高温となって柔軟
性を帯びてきたときに、保護管を回転させたまま保護管
の端部を引っ張って加熱部分を引き伸ばす。For example, 3 to 5 cm from the tip of the protective tube.
In the method of cutting and sealing at a position away from the tor, the protective tube is held by a rotating jig for a lathe, and the oxyhydrogen burner is rotated while rotating the protective tube around an axis passing vertically through the end of the protective tube. Is used to heat a portion 3-5 cm from the end of the protective tube. When the heated portion of the protective tube becomes hot and becomes flexible, the heated portion is stretched by pulling the end of the protective tube while rotating the protective tube.
【００１１】伸ばされた加熱部分の温度が下がって石英
が硬化してきたときに、その伸ばされた部分を切断して
保護管端部の不要な切断片を取り除く。切断した保護管
の端部は尖った状態のままであるから、その端部をゆっ
くり加熱しながら丸めて先端を封じる。この作業によっ
て完成品の保護管の先端は試験管の底部のように丸く仕
上げることができる。本発明はこの実施の形態のように
保護管の途中を切断して封じる方法に限定されるもので
はなく、先端が開放された保護管を切断することなくそ
の先端開放口を加熱して封じる方法であってもよい。こ
の場合、保護管の寸法は最大となる。When the temperature of the stretched heated portion is lowered and the quartz is hardened, the stretched portion is cut to remove unnecessary cutting pieces at the end of the protective tube. Since the end of the cut protection tube remains sharp, the end is sealed by rolling while slowly heating it. By this operation, the end of the protection tube of the finished product can be rounded like the bottom of the test tube. The present invention is not limited to the method of cutting and sealing the protection tube in the middle as in this embodiment, but a method of heating and sealing the tip opening port without cutting the protection tube whose tip is open. May be In this case, the protection tube has the largest dimension.
【００１２】[0012]
【発明の効果】本発明は以上のような構成であって、先
端が開放された保護管に熱電対を挿入して固定した後に
熱電対の先端よりも先方の位置で保護管を封じることを
特徴とする。したがって、保護管がＬ字形に曲がったも
のである場合、一つの規格の保護管を製造するだけで、
先端が封じられた保護管の寸法を自由に設定することが
できる。従来品は保護管の製造時に先端を封じていたか
ら、保護管の寸法ごとに異なった規格のものを別々に製
造しなければならないのでコストがかさみ、多数の寸法
の保護管を在庫として用意しなければならなかった。本
発明は一つの規格の保護管で種々の寸法のものを調達で
きるのでコストがかからず、多数の寸法の保護管を用意
しておくという不便を解消できる。EFFECTS OF THE INVENTION The present invention is constructed as described above, and after inserting and fixing a thermocouple into a protection tube having an open end, the protection tube is sealed at a position ahead of the tip of the thermocouple. Characterize. Therefore, if the protection tube is bent into an L shape, it is only necessary to manufacture one standard protection tube.
It is possible to freely set the size of the protection tube whose tip is sealed. Conventional products sealed the tip at the time of manufacturing the protective tube, so it was necessary to separately manufacture different standards for each dimension of the protective tube, so the cost was high, and it was necessary to prepare a large number of protective tubes in stock. did not become. According to the present invention, since protection tubes of various sizes can be procured by a protection tube of one standard, cost is not required, and the inconvenience of preparing protection tubes of many sizes can be solved.
【００１３】更に、保護管内に熱電対を挿入するときに
保護管の先端はまだ開放されているから、熱電対の挿入
ミスでその先端が保護管の先端開放口から突き出ること
があっても、保護管の先端を突き破る虞がない。従来
は、あらかじめ先端が封じられた保護管に熱電対を挿入
していたので、挿入ミスによって熱電対が保護管の先端
に突き当たって先端を破損する虞があったが、本発明で
はそのような虞がないという効果を奏する。Furthermore, since the tip of the protective tube is still open when the thermocouple is inserted into the protective tube, even if the tip may protrude from the opening opening of the protective tube due to a mistake in inserting the thermocouple, There is no risk of breaking through the tip of the protective tube. Conventionally, since a thermocouple was inserted into a protective tube whose tip was sealed in advance, there was a risk that the thermocouple might hit the distal end of the protective tube due to an insertion error and break the distal end. There is an effect that there is no fear.
【００１４】また、保護管の先端開放口よりも手前の部
分を加熱してその加熱された部分を引き伸ばし、その後
加熱部分の温度が下がってその部分が硬化した後にその
部分を切断し、保護管の切断端部を徐々に加熱すること
により保護管を封じる方法によれば、保護管の寸法を決
めてその部分で保護管を封じる作業が容易且つ迅速とな
り、しかも封じられた端部は試験管の底部のように丸く
滑らかに仕上げることができる。Further, the portion of the protective tube in front of the opening opening is heated to stretch the heated portion, and thereafter, the temperature of the heated portion is lowered and the portion is hardened, and then the portion is cut to form the protective tube. According to the method of sealing the protection tube by gradually heating the cut end of, the work of determining the size of the protection tube and sealing the protection tube at that part becomes easy and quick, and the sealed end is the test tube. It can be rounded and smooth like the bottom of the.
【００１５】従来の直管状の保護管に熱電対を挿入して
から所定の位置と曲げ半径で加熱曲げ加工する方法で
は、保護管の内部に熱電対が既に挿入されているので、
加熱曲げ加工の状況の変化の影響を受けて製品の精度が
出しにくく、熱電対をかなり高温にさらすことになるか
ら精度の低下を来す虞がある。本発明は、保護管の曲が
った温度検出端を製造するときに保護管の曲げ加工の状
況変化の影響を受けず、且つ曲げ加工の際に熱電対が高
温にさらされることなく、精度の高い製品を供給するこ
とができるという効果を奏する。In the conventional method of inserting a thermocouple into a straight tubular protection tube and then heating and bending it at a predetermined position and bending radius, since the thermocouple is already inserted inside the protection tube,
The accuracy of the product is hardly obtained due to the influence of the change in the state of the heating bending process, and the thermocouple is exposed to a considerably high temperature, so that the accuracy may be reduced. The present invention is not affected by a change in the state of the bending process of the protective tube when manufacturing the bent temperature detecting end of the protective tube, and the thermocouple is not exposed to a high temperature during the bending process and has high precision. The effect is that products can be supplied.
Claims (2)
対の先端が、保護管を封じる予定位置の手前付近に達す
るまで熱電対を挿入し、熱電対がその位置から更に進入
し又は後退しないように熱電対を保護管に対して相対的
に移動不能に固定した後、熱電対の先端よりも先方の位
置で前記保護管を封じることを特徴とする温度検出端の
製造方法1. A thermocouple is inserted into a protective tube having an open tip until the tip of the thermocouple reaches a position near a position where the protective tube is to be sealed, and the thermocouple further advances or retracts from the position. The thermocouple is fixed so as not to move relative to the protective tube so that the protective tube is not moved, and the protective tube is sealed at a position ahead of the tip of the thermocouple.
てその加熱された部分を引き伸ばし、加熱部分の温度が
下がってその部分が硬化した後にその部分を切断し、保
護管の切断端部を徐々に加熱することにより保護管を封
じることを特徴とする請求項１記載の温度検出端の製造
方法2. A cut end of the protective tube, which is cut after the heated portion is heated and the heated portion is stretched and the temperature of the heated portion is lowered and the portion is hardened. The method for manufacturing a temperature detecting end according to claim 1, wherein the protective tube is sealed by gradually heating the portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8135700A JP2805610B2 (en) | 1996-05-07 | 1996-05-07 | Manufacturing method of temperature detection end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8135700A JP2805610B2 (en) | 1996-05-07 | 1996-05-07 | Manufacturing method of temperature detection end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09297068A true JPH09297068A (en) | 1997-11-18 |
| JP2805610B2 JP2805610B2 (en) | 1998-09-30 |
Family
ID=15157858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8135700A Expired - Lifetime JP2805610B2 (en) | 1996-05-07 | 1996-05-07 | Manufacturing method of temperature detection end |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805610B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009074978A (en) * | 2007-09-21 | 2009-04-09 | Fenwall Controls Of Japan Ltd | Temperature sensor and method of manufacturing temperature sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533689A (en) * | 1979-06-27 | 1980-03-08 | Fujikura Ltd | Formation method of thermal contact end portion of thermocouple wire |
| JPS59166146U (en) * | 1983-04-22 | 1984-11-07 | 株式会社 岡崎製作所 | Thermal junction of thermocouple |
| JPH0559263U (en) * | 1992-01-22 | 1993-08-06 | 石川島播磨重工業株式会社 | Thermocouple tip structure |
| JPH05340821A (en) * | 1992-06-05 | 1993-12-24 | Fenwall Controls Of Japan Ltd | Manufacture of l-shaped thermocouple device |
-
1996
- 1996-05-07 JP JP8135700A patent/JP2805610B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533689A (en) * | 1979-06-27 | 1980-03-08 | Fujikura Ltd | Formation method of thermal contact end portion of thermocouple wire |
| JPS59166146U (en) * | 1983-04-22 | 1984-11-07 | 株式会社 岡崎製作所 | Thermal junction of thermocouple |
| JPH0559263U (en) * | 1992-01-22 | 1993-08-06 | 石川島播磨重工業株式会社 | Thermocouple tip structure |
| JPH05340821A (en) * | 1992-06-05 | 1993-12-24 | Fenwall Controls Of Japan Ltd | Manufacture of l-shaped thermocouple device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009074978A (en) * | 2007-09-21 | 2009-04-09 | Fenwall Controls Of Japan Ltd | Temperature sensor and method of manufacturing temperature sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2805610B2 (en) | 1998-09-30 |
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