JPS63215957A - Explosionproof sensor - Google Patents
Explosionproof sensorInfo
- Publication number
- JPS63215957A JPS63215957A JP62049371A JP4937187A JPS63215957A JP S63215957 A JPS63215957 A JP S63215957A JP 62049371 A JP62049371 A JP 62049371A JP 4937187 A JP4937187 A JP 4937187A JP S63215957 A JPS63215957 A JP S63215957A
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- explosionproof
- resin
- platinum wire
- explosion
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 3
- 239000000057 synthetic resin Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は防爆型センサーに関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to an explosion-proof sensor.
（従来技術）
一般に、可燃性の雰囲気中では耐圧防爆の構造をもった
ものでないと設置できないことが法律上規定されている
。(Prior Art) In general, it is legally stipulated that in a flammable atmosphere, a device that does not have a flameproof and explosion-proof structure cannot be installed.
つまり、圧が加わると変形するものとか、内部に空間が
あるものは使用できないし、可燃性の雰囲気中では懐中
電灯の携帯用や換気扇の取付はできないことにな°って
いる。In other words, items that deform when pressure is applied or items that have spaces inside cannot be used, and it is not allowed to carry flashlights or install ventilation fans in flammable atmospheres.
従来、これに関するものとして本出願人は、先に特願昭
５９−” ７３３４号及び特願昭６１−２８２８０号号
として発熱体と流体の温度差から流体の熱伝達率を測定
することによって、その粘度を求める方法を提案してい
る。Conventionally, in connection with this, the present applicant previously published Japanese Patent Application No. 59-7334 and Japanese Patent Application No. 61-28280 by measuring the heat transfer coefficient of a fluid from the temperature difference between the heating element and the fluid. We are proposing a method for determining its viscosity.
（発明が解決しようとする問題点）
しかしながら、上述の特願昭５９−７３３４号及び特願
昭６１−２８２８０号に示したセンサーは流体物質中に
直接細線を装入するものであり、以上の如く、可燃性の
雰囲気中では電流を流すと火花をちらすものは用いられ
ないようになっているので、ペイントとかインクの粘度
を測定するのに用いることは当然できない。(Problems to be Solved by the Invention) However, the sensors shown in the above-mentioned Japanese Patent Application No. 59-7334 and Japanese Patent Application No. 61-28280 insert a thin wire directly into a fluid substance, and the above-mentioned As mentioned above, it is prohibited to use a device that generates sparks when an electric current is passed in a flammable atmosphere, so it cannot naturally be used to measure the viscosity of paint or ink.
（問題点を解決するための手段）
したがって本発明の技術的課題は、可燃性の雰囲気中で
も用いられる発熱体と測温抵抗体とからなるセンサーを
うろことを目的とするもので、この技術的課題を解決す
る本発明の技術的手段は、測温抵抗体と発熱体から引き
出されるリード線を耐圧防爆コネクターを介して耐圧防
爆ケーブルに接続し、かつ測温抵抗体と発熱体とは何れ
もその空間部が合成樹脂もしくはセラミックスで充填さ
れてシールされた形の防爆型センサーである。(Means for Solving the Problems) Therefore, the technical problem of the present invention is to measure a sensor consisting of a heating element and a resistance temperature detector, which is used even in a flammable atmosphere. The technical means of the present invention to solve the problem is to connect the lead wires drawn out from the resistance temperature detector and the heating element to a flameproof explosion-proof cable via a flameproof explosion-proof connector, and to connect the resistance temperature detector and the heating element to each other. This is an explosion-proof sensor whose space is filled and sealed with synthetic resin or ceramics.
（発明の効果）
本発明のものによれば、発熱体が例えばセラミックに発
熱体を外装し、更にこれを樹脂でカバーして形成した、
いわゆる多層構造のものであっても空間部分がないよう
に樹脂で空間部分を埋めることによって完全に絶縁が施
されて、火花がちるようなことはなく、しかもそのエポ
キシ系の充填樹脂によって熱伝導率を大きくし、外面と
内面の温度差を小さくすることができるので、発熱体の
平均温度の選択が容易である。(Effects of the Invention) According to the present invention, the heating element is formed by enclosing the heating element in, for example, ceramic and further covering this with resin.
Even with a so-called multi-layer structure, by filling the voids with resin, complete insulation is achieved, preventing sparks, and the epoxy-based resin fills in heat conduction. Since the ratio can be increased and the temperature difference between the outer surface and the inner surface can be reduced, it is easy to select the average temperature of the heating element.
（実施例） 以下、図面に示す実施例について説明する。(Example) The embodiments shown in the drawings will be described below.
（１）は発熱体であり、（２）は測温抵抗体である６発
熱体（１）は測温抵抗体より電流値が大きいものでもよ
い。(1) is a heating element, and (2) is a resistance temperature detector. 6Heating element (1) may have a larger current value than the resistance temperature detector.
（３）はこれら発熱体（１）と測温抵抗体（２）が取付
けられるフランジであり、（４）（５）はこのフランジ
（３）に取付けられた耐圧防爆コネクターであって、こ
の中に発熱体（１）と測温抵抗体（２）の図示しないリ
ード線がカバーされており、これらリード線は耐圧防爆
ケーブル（６）（７）にそれぞれ接続されており、更に
これら各ケーブルは図示しない電流源、電圧計等に接続
される。(3) is a flange to which these heating element (1) and resistance temperature detector (2) are attached, and (4) and (5) are flameproof and explosion-proof connectors attached to this flange (3). The lead wires (not shown) of the heating element (1) and the resistance temperature detector (2) are covered, and these lead wires are connected to flameproof explosion-proof cables (6) and (7), respectively, and each of these cables is It is connected to a current source, voltmeter, etc. (not shown).
発熱体（１）は、例えばセラミック芯体（８）の外に白
金線（９）を巻き、その外周に絶縁樹脂（１０）で外装
したものを用い、必要に応じて外周を更にステンレスパ
イプ（１１）で外装したものを用い、これらのうち特に
白金線で巻いた部分に空間が残らないよう樹脂を充填し
てシールするもので、シールするに当たって真空で樹脂
を引き入れる方法が考えられる。The heating element (1) is, for example, made by winding a platinum wire (9) around a ceramic core (8) and covering the outer periphery with an insulating resin (10). If necessary, the outer periphery is further covered with a stainless steel pipe ( 11) is used, and the part wrapped with platinum wire is filled with resin and sealed so that no space remains.One possible method is to draw the resin in a vacuum during sealing.
何れにしても、センサーに中空部分が存在しないものを
用いるものである。In any case, a sensor with no hollow portion is used.
このように構成される発熱体（１）は、その平均温度θ
−と表面温度θＳとの関係式をあらかじめ実験的に決定
しており勤ければならないが、この関係式は伝導及び対
流による熱伝達の現象を定める実験式、
Ｎｕ＝Ｃｏ・Ｇｒ′Ｌ、Ｐｒ”、Ｒｅ’（０３７０ｗ）
４ここでＮｕ：ヌッセルト数
Ｇｒ：グラスホフ数
Ｐｒニブラントル数
Ｒｅ：レイノルズ数
Ｃｏ、−４：定数
において、物性値と温度の関係が既知の流体、例えば水
を用いることによって決定することができる。The heating element (1) configured in this way has an average temperature θ
- and the surface temperature θS must be experimentally determined in advance, but this relational expression is an experimental formula that determines the phenomenon of heat transfer by conduction and convection, Nu=Co・Gr'L,Pr ", Re' (0370w)
4 where Nu: Nusselt number Gr: Grashoff number Pr Nybrandtl number Re: Reynolds number Co, -4: constant The relationship between physical property values and temperature can be determined by using a known fluid such as water, for example.
以上の如く、測温抵抗体や発熱体は樹脂で被覆又はシー
ルされているので、白金線に電流を流しても火花をちら
すようなことはないし、リード線は耐圧防爆コネクター
でカバーされて耐圧防爆ケーブルに接続されているので
ペイントとかインクのような可燃性のものを取扱う工場
において、その粘度を測定するのに用いて効果がある。As mentioned above, the resistance temperature detector and heating element are coated or sealed with resin, so even if current is passed through the platinum wire, there will be no sparks, and the lead wire is covered with a flameproof explosion-proof connector to withstand pressure. Since it is connected to an explosion-proof cable, it can be used effectively to measure the viscosity of flammable materials such as paint and ink in factories that handle flammable materials.
第１図は本発明センサーの平面図、 第２図は発熱体の断面図である。 （１）・・・・・発熱体 （２）・・・・・測温抵抗体 （３）・・・・・フランジ FIG. 1 is a plan view of the sensor of the present invention; FIG. 2 is a sectional view of the heating element. (1)・・・Heating element (2)・・・Resistance temperature sensor (3)・・・Flange
Claims (1)
爆コネクターを介して耐圧防爆ケーブルに接続し、かつ
測温抵抗体と発熱体とは何れもその空間部が合成樹脂も
しくはセラミックスで充填されてシールされた形の防爆
型センサー。Connect the lead wires drawn out from the resistance temperature detector and heating element to a flameproof explosion-proof cable via a flameproof explosion-proof connector, and make sure that the spaces in both the resistance temperature detector and the heating element are filled with synthetic resin or ceramics. Explosion-proof sensor in sealed form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049371A JPS63215957A (en) | 1987-03-04 | 1987-03-04 | Explosionproof sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049371A JPS63215957A (en) | 1987-03-04 | 1987-03-04 | Explosionproof sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63215957A true JPS63215957A (en) | 1988-09-08 |
Family
ID=12829170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62049371A Pending JPS63215957A (en) | 1987-03-04 | 1987-03-04 | Explosionproof sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63215957A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112558A (en) * | 1979-02-21 | 1980-08-30 | Matsushita Electric Ind Co Ltd | Gas sensor and its production |
| JPS5631630A (en) * | 1979-08-23 | 1981-03-31 | Matsushita Electric Ind Co Ltd | Gas detector |
| JPS5678613A (en) * | 1979-12-03 | 1981-06-27 | Yoshimi Oshitari | Filter paper of air filter |
| JPS587552A (en) * | 1981-07-06 | 1983-01-17 | Matsushita Electric Works Ltd | Gas detecting element |
| JPS5911615A (en) * | 1982-07-12 | 1984-01-21 | 岡谷電機産業株式会社 | Case sheathing type electronic part |
| JPS5944011A (en) * | 1982-09-07 | 1984-03-12 | Tokyo Tatsuno Co Ltd | Explosion-proof box |
-
1987
- 1987-03-04 JP JP62049371A patent/JPS63215957A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112558A (en) * | 1979-02-21 | 1980-08-30 | Matsushita Electric Ind Co Ltd | Gas sensor and its production |
| JPS5631630A (en) * | 1979-08-23 | 1981-03-31 | Matsushita Electric Ind Co Ltd | Gas detector |
| JPS5678613A (en) * | 1979-12-03 | 1981-06-27 | Yoshimi Oshitari | Filter paper of air filter |
| JPS587552A (en) * | 1981-07-06 | 1983-01-17 | Matsushita Electric Works Ltd | Gas detecting element |
| JPS5911615A (en) * | 1982-07-12 | 1984-01-21 | 岡谷電機産業株式会社 | Case sheathing type electronic part |
| JPS5944011A (en) * | 1982-09-07 | 1984-03-12 | Tokyo Tatsuno Co Ltd | Explosion-proof box |
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