JPH0684330U - Dial thermometer - Google Patents
Dial thermometerInfo
- Publication number
- JPH0684330U JPH0684330U JP2503993U JP2503993U JPH0684330U JP H0684330 U JPH0684330 U JP H0684330U JP 2503993 U JP2503993 U JP 2503993U JP 2503993 U JP2503993 U JP 2503993U JP H0684330 U JPH0684330 U JP H0684330U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- temperature sensing
- sensing part
- conduit
- winding
- 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
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
(57)【要約】
【目的】 巻線5と感温部1との間の絶縁層における温
度勾配とそれに含まれる測定誤差を最小とする。
【構成】 感温部1と表示部3とそれらをつなぐ導管2
から成り、少なくとも感温部1を電気的絶縁物で構成す
る。この場合、感温部1のみならず、導管2を電気的絶
縁物で構成することもできる。また感温部1に充填され
る封入液体を有機液体とすることもできる。
(57) [Abstract] [Purpose] Minimize the temperature gradient in the insulating layer between the winding 5 and the temperature sensing part 1 and the measurement error contained in it. [Structure] Temperature sensing part 1, display part 3 and conduit 2 connecting them
And at least the temperature sensitive portion 1 is made of an electrical insulator. In this case, not only the temperature sensing part 1 but also the conduit 2 can be made of an electrically insulating material. Further, the sealed liquid filled in the temperature sensitive portion 1 may be an organic liquid.
Description
【0001】[0001]
本考案は感温部と表示部とそれらをつなぐ導管から成るダイヤル温度計に関す る。 The present invention relates to a dial thermometer including a temperature sensing part, a display part, and a conduit connecting them.
【0002】[0002]
ダイヤル温度計は温度監視を行う装置としては最も一般的なものであり、構造 としては測定しようとする場所に置かれる感温部と測定した温度を指示させる表 示部と、それらをつなぐ導管から成り立っている。 The dial thermometer is the most common device for temperature monitoring, and as a structure, it consists of a temperature sensitive part placed at the place to be measured, a display part for indicating the measured temperature, and a conduit connecting them. It is made up.
【0003】 感温部は、円筒形状の金属から成り、内部には周囲の温度変化に比例し、膨脹 、収縮する水銀等の作動液体が加圧封入されている。感温部の温度変化による圧 力変化は導管を介して表示部内に取付けられたブルドン管に伝達している。ブル ドン管の動作は圧力変化に比例し、歯車、指針等を経て計器の指示面に指示され る。The temperature sensing part is made of a cylindrical metal, and a working liquid such as mercury that expands and contracts in proportion to a change in ambient temperature is pressurized and sealed inside. The pressure change due to the temperature change of the temperature sensing part is transmitted to the Bourdon tube installed in the display part via a conduit. The operation of the Bourdon tube is proportional to the pressure change, and is instructed on the indicator surface of the instrument via gears, pointers, etc.
【0004】[0004]
例えば巻線が樹脂でモールドされたモールド変圧器コイルに対して、従来のダ イヤル温度計の感温部をモールドコイルに埋込み取付けて温度監視をする場合、 温度計感温部が金属製であるため、巻線との間に使用電圧に相当した絶縁のため の間隔、すなわち樹脂層を確保することが必要である。このように感温部が熱伝 達の良好な金属製であるにもかかわらず、被測定物との間の熱抵抗の大きな絶縁 層を設けるため、感温部への伝達温度すなわちダイヤル温度計での監視温度は絶 縁層での大きな温度勾配が差し引かれた低い値となる。この場合、当然のことな がら、変圧器の運転時の温度管理は温度計指示値に対し、この絶縁層での温度勾 配を補正して行なわれる。しかしながら絶縁層での温度勾配すなわち発熱体であ る巻線から感温部への熱流の大きさはその性質上、モールドコイル周囲の温度や 風速等の環境条件に左右され易く、前述の補正に対する大きな誤差要因となる。 これは、絶縁層が広く、またモールドコイルが大きくなる程すなわち変圧器が高 電圧,大容量となる程顕著であり問題となる。 本考案の目的は、巻線等の充電部と感温部との間の絶縁層における温度勾配と それに含まれる測定誤差が最小となるダイヤル温度計を提供することにある。 For example, when the temperature is monitored by embedding the temperature sensing part of a conventional dial thermometer in a mold coil for a molded transformer coil whose winding is molded with resin, the thermometer temperature sensing part is made of metal. Therefore, it is necessary to secure a space for insulation corresponding to the working voltage, that is, a resin layer, between the winding and the winding. Even though the temperature sensing part is made of metal with good heat transfer, an insulating layer with a high thermal resistance between the temperature sensing part and the object to be measured is provided. The temperature monitored at is low with a large temperature gradient in the insulating layer subtracted. In this case, as a matter of course, the temperature control during operation of the transformer is performed by correcting the temperature gradient in this insulating layer with respect to the thermometer reading. However, the temperature gradient in the insulating layer, that is, the magnitude of the heat flow from the winding, which is the heating element, to the temperature-sensitive part is, by its nature, easily influenced by environmental conditions such as the temperature around the mold coil and the wind speed. It causes a big error. This becomes a problem because the insulating layer is wider and the mold coil is larger, that is, the transformer has a higher voltage and a larger capacity. An object of the present invention is to provide a dial thermometer in which a temperature gradient in an insulating layer between a charging section such as a winding and a temperature sensing section and a measurement error included in the temperature gradient are minimized.
【0005】[0005]
本考案は感温部と表示部とそれらをつなぐ導管から成るダイヤル温度計におい て、少なくとも感温部を電気的絶縁物で構成したことを特徴とするものである。 この場合、感温部のみならず、導管を電気的絶縁物で構成することもできる。 また感温部に充填される封入液体を有機液体とすることもできる。 The present invention is a dial thermometer comprising a temperature sensing part, a display part, and a conduit connecting them, and at least the temperature sensing part is made of an electrically insulating material. In this case, not only the temperature sensing part but also the conduit can be made of an electrically insulating material. Further, the sealed liquid filled in the temperature sensitive portion may be an organic liquid.
【0006】[0006]
上記の構成によれば、感温部をより巻線に接近して取付けることが可能となり 、巻線との絶縁層における温度勾配を小さくすることができ、測定誤差をより小 さく抑えることが可能となる。 According to the above configuration, the temperature sensing part can be mounted closer to the winding, the temperature gradient in the insulating layer between the winding and the winding can be reduced, and the measurement error can be further suppressed. Becomes
【0007】[0007]
以下本考案の一実施例について説明する。図1において、1は円筒状の感温部 で、プラスチックやガラス,磁器等の電気的絶縁物で構成されている。2は導管 で、感温部1の温度変化による圧力変化を表示部3内に取付けられたブルドン管 に伝達している。ブルドン管の動作は圧力変化に比例し、歯車、指針等を経て計 器の指示面に指示される。 An embodiment of the present invention will be described below. In FIG. 1, reference numeral 1 is a cylindrical temperature-sensitive portion, which is made of an electrically insulating material such as plastic, glass, or porcelain. Reference numeral 2 is a conduit for transmitting a pressure change due to a temperature change of the temperature sensing unit 1 to a Bourdon tube mounted in the display unit 3. The operation of the Bourdon tube is proportional to the pressure change and is instructed on the pointing surface of the instrument via gears, pointers, etc.
【0008】 このように感温部1を電気的絶縁物で構成することにより、図2に示すように モールドコイル4内への埋込取付において、巻線5からの離間距離は、感温部1 が金属製の場合と比較して小さくすることができる。この場合、感温部1を電気 的絶縁物とすることにより、この部分の熱抵抗が金属製の場合と比較して大きい ため巻線からの温度勾配を大巾に小さくすることはできないが、巻線5との間隔 が小さくなることにより、この間での熱流分布の変化による誤差はその分小さく 抑えることができる。Since the temperature sensing part 1 is made of an electrically insulating material as described above, when the temperature sensing part 1 is embedded in the molded coil 4 as shown in FIG. It can be made smaller than the case where 1 is made of metal. In this case, by making the temperature sensing part 1 an electrical insulator, the thermal resistance of this part is large compared to the case of metal, so the temperature gradient from the winding cannot be greatly reduced, but By reducing the distance from the winding 5, the error due to the change in the heat flow distribution during this period can be suppressed to that extent.
【0009】 また本考案の他の実施例として、上記実施例におけるダイヤル温度計において 、更に導管部2もプラスチックなどの電気的絶縁物で構成することができる。 このように構成することにより、モールドコイル4から接地金属部を無くする ことができ、安全に感温部1の埋込取付けおよび感温部1からの導管2の引きま わしを行なうことができる。As another embodiment of the present invention, in the dial thermometer in the above embodiment, the conduit portion 2 may be made of an electrically insulating material such as plastic. With this configuration, it is possible to eliminate the ground metal part from the molded coil 4, and it is possible to safely mount the temperature-sensitive part 1 by embedding and swirl the conduit 2 from the temperature-sensitive part 1. .
【0010】 更に、他の実施例として、通常感温部に封入される作動液体は水銀が一般的に 用いられるが、これを例えばアルコール等の有機液体を使用する。すなわちダイ ヤル温度計の感温部1、導管2および感温部1内の封入液体をすべて電気的絶縁 物で構成する。このようにすればモールドコイル4への感温部1の埋込取付けに おいて巻線5に対する絶縁の配慮は一切不要となり、感温部1は巻線5に近接し て取付ることが可能となり、巻線5からの温度勾配も極めて小さくなり誤差の少 ない温度監視ができる。Further, as another embodiment, mercury is generally used as the working liquid that is usually sealed in the temperature sensing part, and an organic liquid such as alcohol is used as the working liquid. That is, the temperature sensing part 1, the conduit 2 and the liquid enclosed in the temperature sensing part 1 of the dial thermometer are all made of an electrical insulator. In this way, when mounting the temperature sensitive part 1 in the molded coil 4, it is not necessary to consider the insulation of the winding 5, and the temperature sensitive part 1 can be mounted close to the winding 5. Therefore, the temperature gradient from the winding 5 becomes extremely small, and the temperature can be monitored with little error.
【0011】[0011]
以上の説明から明らかなように、本考案によれば、少なくとも感温部を電気的 絶縁物で構成したことにより。巻線と感温部との間の絶縁層における温度勾配と それに含まれる測定誤差を最小とすることができ、充電された電気機器の温度監 視が精度良く且安全に行なうことができる。 As is clear from the above description, according to the present invention, at least the temperature sensing part is made of an electrically insulating material. The temperature gradient in the insulating layer between the winding and the temperature sensing portion and the measurement error contained in it can be minimized, and the temperature monitoring of the charged electric device can be performed accurately and safely.
【図1】本考案によるダイヤル温度計の一実施例を示す
概略構造図FIG. 1 is a schematic structural diagram showing an embodiment of a dial thermometer according to the present invention.
【図2】図1に示すダイヤル温度計の感温部をモールド
コイルに埋込み取付けした状態を一部断面して示す概略
斜視図FIG. 2 is a schematic perspective view showing a state in which a temperature sensing part of the dial thermometer shown in FIG.
1は感温部、2は導管、3は表示部、4はモールドコイ
ル、5は巻線を示す。Reference numeral 1 is a temperature sensitive portion, 2 is a conduit, 3 is a display portion, 4 is a molded coil, and 5 is a winding.
Claims (3)
ら成るダイヤル温度計において、少なくとも感温部を電
気的絶縁物で構成したことを特徴とするダイヤル温度
計。1. A dial thermometer comprising a temperature sensing part, a display part and a conduit connecting them, wherein at least the temperature sensing part is made of an electrically insulating material.
ことを特徴とする請求項1記載のダイヤル温度計。2. The dial thermometer according to claim 1, wherein the temperature sensing part and the conduit are made of an electrically insulating material.
としたことを特徴とする請求項1記載のダイヤル温度
計。3. The dial thermometer according to claim 1, wherein the sealed liquid filled in the temperature sensing portion is an organic liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2503993U JPH0684330U (en) | 1993-05-14 | 1993-05-14 | Dial thermometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2503993U JPH0684330U (en) | 1993-05-14 | 1993-05-14 | Dial thermometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0684330U true JPH0684330U (en) | 1994-12-02 |
Family
ID=12154775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2503993U Pending JPH0684330U (en) | 1993-05-14 | 1993-05-14 | Dial thermometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0684330U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987005968A1 (en) * | 1986-04-01 | 1987-10-08 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling the engine of wheeled construction machine |
-
1993
- 1993-05-14 JP JP2503993U patent/JPH0684330U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987005968A1 (en) * | 1986-04-01 | 1987-10-08 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling the engine of wheeled construction machine |
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