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JP4370545B2 - Mantle heater - Google Patents

Mantle heater Download PDF

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Publication number
JP4370545B2
JP4370545B2 JP2000057867A JP2000057867A JP4370545B2 JP 4370545 B2 JP4370545 B2 JP 4370545B2 JP 2000057867 A JP2000057867 A JP 2000057867A JP 2000057867 A JP2000057867 A JP 2000057867A JP 4370545 B2 JP4370545 B2 JP 4370545B2
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JP
Japan
Prior art keywords
furnace
top plate
heater
mantle heater
heating
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JP2001205111A (en
JP2001205111A5 (en
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時男 桐山
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Individual
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Description

【0001】
【発明の属する技術分野】
本発明は各種の理化学実験において、フラスコやビ−カ−等、実験用ガラス器具の容器を加熱するマントルヒ−タ−に関する。
【0002】
【従来の技術】
マントルヒ−タ−は反応,分留,抽出その他の理化学実験における加熱器として広く使用されている。従来のマントルヒ−タ−として、例えば図5に示すものが一般に知られている。この従来のマントルヒ−タ−は同図に示すように、耐熱性炉台Aの上部中央にフラスコ等、実験用ガラス器具の容器Bのほゞ下半部の形状と適合する形状の半円球状の加熱部Cを形成すると共に、加熱部Cの周囲に位置させてヒ−タ−Dを埋設し、前記加熱部C内に容器Bの下半部を収容して載置し、加熱するように構成してある。また、炉台Aは金属板製等の外装容器Eに収容され、この容器Eの開口上端には内方へ折曲した環状フランジFが形成され、このフランジFを炉台Aの上面における外側周縁部に当接して炉台Aを押さえるようにしてある。同図において、Gは電源スイッチ、Hは差込プラグを示す。なお、図3のマントルヒ−タ−は炉台Aを容器Eに収容したものを例示したが、容器Eを備えていないものもある。
【0003】
【発明が解決しようとする課題】
上記従来のマントルヒ−タ−は次のような問題を有している。即ち、前記炉台Aはグラスウ−ル,ロックウ−ル,セラミック繊維等の布地材を重ね合わせて構成され、通気性(ガス流通性)を有している。そして、炉台Aは加熱部Cを含め、上端側のほとんどの部分が外部に露呈しているので、例えば使用中にフラスコ等が破損したり、サンプル(液体)が吹きこぼれた場合にはサンプルが炉台A内に浸み込んでヒ−タ−D部に達してヒ−タ−(ニクロム線)を腐蝕させる原因になると共にサンプルがアルコ−ル類等の場合には発火する危険性がある。また、実験室内のガス雰囲気中にはエ−テル等のアルコ−ルガスが含まれていることが多く見られるが、従来のマントルヒ−タ−は炉台Aの上部から炉台内へガスの流通性があり、そのため、いわばほゞ裸火と同じことになり、危険性を有しているとの指摘がされている。
【0004】
本発明は上記のような実情に鑑みてなされたもので、フラスコ等、実験用ガラス器具の容器が破損したり、サンプルが吹きこぼれた場合においてもサンプルが炉台内へ浸入するのを防止すると共に実験室内のガス雰囲気が炉台の上部側から内部に入り込むのを防止し得るマントルヒ−タ−を提供することを目的とするものである。
【0005】
【課題を解決するための手段】
上記目的を達成するため、本発明のうち1つの発明(第1の発明)は、筒状胴部の上端を天板で気密性を保持して閉塞すると共に前記天板のほゞ中央部に加熱部を形成した金属板製の炉台と、
前記炉台内に配置され、前記加熱部を加熱するヒーターと、
前記胴部の外側面を被覆して、前記胴部に固定装着した防熱用の被覆筒体とを備え、
前記加熱部は前記天板を実験用ガラス器具の容器のほゞ下半部の形状とほゞ対応する形状に凹ませて形成され、
前記ヒーターは前記加熱部と絶縁させて設けてあり、
前記胴部の下端は底蓋部材で気密に閉塞され、
前記ヒーターのリード線は気密性を保持して前記胴部外に導出されている
ことを特徴とする。
【0006】
上記のように構成すると、炉台の上部側は外部と完全に気密性を保持して密閉されているので、使用中にフラスコ等が破損したり、吹きこぼれたとしても、サンプルが炉台内に浸入するのを防止する。また、炉台の上部側から炉台内へガスが流通するのをシャットアウトしているので、実験室内のアルコール類等のガス雰囲気が炉台内に入って発火する危険性を防止する。さらに、炉台の筒状胴部の外側部は被覆筒体で被覆され、これが防熱用として作用するので、使用中に手などが接触して火傷するのを防止する。
さらにまた、上記のように前記胴部の下端を底蓋部材で気密に閉塞し、前記リード線を気密性を保持して前記胴部外に導出する構成を採用したので、炉台全体が外部とのガス流通性をシャットアウトされる。
【0007】
本発明の他の1つの発明(第2の発明)は、第1の発明のマントルヒーターにおいて、前記加熱部は、前記天板を半円球状に凹ませて形成されていることを特徴とする。
【0008】
本発明のうち、さらに他の1つの発明(第3の発明)は、第1の発明のマントルヒーターにおいて、前記加熱部は、前記天板を円筒形状に凹ませて形成されていることを特徴とする。
【0009】
本発明のうち、さらに他の1つの発明(第4の発明)は、第1ないし第3のいずれかの発明のマントルヒーターにおいて、上端を前記天板の上方側へ開口すると共に前記胴部内と気密性を保持して前記炉台内に設けたセンサー挿入管を備えていることを特徴とする。このように構成すると、前記挿入管内に熱電対等の温度センサーを挿入して炉台内の温度を検知できるので、加熱温度の設定や調整等に利用することができる。
【0010】
本発明においては、前記炉台内に充填材を充填することもできる。この充填材の素材は特に限定されないが、例えば耐熱性かつ絶縁性の綿状部材その他を採用することができる。
また、本発明においては、前記被覆筒体は金網材又は多孔質金属板で構成することもできる。この構成を採用すると、放熱作用が向上する。
【0011】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態の一例を説明する。図1は本発明のマントルヒ−タ−の一実施の形態を示す縦断面図、図2は同上マントルヒ−タ−の被覆筒体の上端側の取付固定部分を拡大して示す縦断面図、図3は同上マントルヒ−タ−のコ−ドの導出部分を拡大して示す縦断面図である。この実施の形態のマントルヒ−タ−は炉台1と、この炉台1内に充填して設けた充填材2と、炉台1内に設けたヒ−タ−3と、炉台1の外側部に設けた防熱用の被覆筒体4とを備えている。
【0012】
前記炉台は鉄板その他の金属板で構成され、所望の大きさの円筒状、角筒状等(この実施の形態では円筒状)の筒状胴部11の上端を天板12で気密性を保持して閉塞すると共に天板12のほゞ中央部に加熱部13を形成してなっている。この実施の形態の炉台1は胴部11と天板12を一体に形成したものを開示したが、両者を別体に構成して溶着等により固着することも可能である。
【0013】
前記加熱部13は天板12をフラスコやビ−カ−その他の実験用ガラス器具の容器Bのほゞ下半部の形状とほゞ対応する形状に凹ませて形成するもので、この実施の形態の加熱部13は天板12の中央部を半円球状に凹ませて形成し、フラスコ用として構成したものが開示されている。この場合、例えばビ−カ−等の容器用に構成する際には、加熱部13を円筒形状等に形成することもできる。
【0014】
この実施の形態の炉台1は胴部11の下端を金属板製の底蓋部材14で気密に閉塞されている。図示の底蓋部材14は胴部11内に嵌合する円筒体15の上端を天板16で閉塞して構成され、この底蓋部材14を胴部11の下端部に嵌合し、円筒体15の下端を胴部11の下端に溶接等で気密に固着17し、天板16で底板を構成してある。
【0015】
前記充填材2として、この実施の形態ではグラスウ−ル,ロックウ−ル,その他の耐熱性かつ絶縁を有する綿状部材21で構成したものを採用し、この綿状部材21を炉台1内に充填して設けてある。
【0016】
前記ヒ−タ−3はニクロム線等で構成され、加熱部13の周囲に位置させて配置すると共に加熱部13と絶縁させて炉台1内に設けてある。前記ヒ−タ−3のリ−ド線31は気密性を保持して胴部11外に導出されている。この実施の形態では胴部11にネジ筒32を気密性を保持させて固着して突設させると共にネジ筒32に、コ−ド挿入孔33を有するネジ部材34を螺合し、リ−ド線31と接続したコ−ド35を前記ネジ筒32およびネジ部材34の孔33を貫通させ、ネジ部材34を締付けることにより、ネジ筒32内に設けたOリング36を押圧してコ−ド35の貫挿部をOリング36でシ−ルさせて固定してある。これにより、リ−ド線31と接続したコ−ド35は気密性を保持して胴部11外に導出されている。なお、前記コ−ド35として、この実施の形態では導線を耐熱性の保護被覆(ゴム材)で被覆したコ−ド(被覆電線)が使用されている。37はコ−ド35の先端に取付けた差込みプラグ、38はア−ス線を示し、ア−ス線38の一端は胴部11に固着39されている。
【0017】
なお、前記底蓋部材14は前記ヒ−タ−3の取付け作業及び充填材2の充填作業その他の所要の作業を終了後に胴部11へ嵌合して固着17するものである。また、この実施の形態のヒ−タ−3はニクロム線等で構成したものを図示したが、ヒ−タ−はニクロム線以外の任意の構成のものを採用することができると共に加熱部13の周囲を含め、炉台1内の全体に配置するように設けることもできる。この構成を採用すると、ヒ−タ−3のスイッチをOFFにしても余熱が炉台1内に残留するので、充填材2を充填するのを省略することができる。
【0018】
前記被覆筒体4は胴部11の熱を遮断し、使用中に手などが接触して火傷するのを防止するためのもので、この実施の形態の筒体4は金網材や多孔質金属板、その他の素材で構成され、胴部11の外側面との間に筒状(この実施の形態では円筒状)の空間部41を形成して胴部11に固定装着されている。これにより胴部11の外側部は前記空間部41を介在して前記筒体4で被覆されているので、胴部11の熱は空間部41を介して放熱され、筒体4に伝熱しないようになっている。この場合、前記空間部41を設けることなく、筒体4を断熱性素材で構成し、これを胴部11に直接被覆して固定装着することもできる。
【0019】
この実施の形態の被覆筒体4は所定の巾及び長さを有する長方形状の金網材42で構成されている。そして、耐熱性のゴム材で構成したスペ−サ−部材43,44を胴部11の上端部及び下端部の外側面に周回して設け、このスペ−サ−部材43,44を介在して金網材42で胴部11を筒状に被覆して被覆筒体4を形成し、筒体4の上端部及び下端部の外側に金属板製のベルト45,46を巻回し、締付具(図示せず)でベルト45,46を締付けて筒体4を胴部11に固定装着してある。なお、筒体4の上端及び下端とベルト45,46との間にはゴム材等の弾性材で構成したパッキング部材47が介装してある。また、前記金網材42の所定部には前記ネジ筒32を挿入する孔48が開設してある。図1において、5は電圧調整器、51は調整器5に設けた電圧調整用ダイヤル、52はコ−ド、53はコ−ドの先端に取付けた差込プラグを示す。
【0020】
この実施の形態のマントルヒ−タ−は上記のように構成し、電圧調整器5のプラグ53を電源コンセント(図示せず)に差込むと共にコ−ド35のプラグ37を電圧調整器5のコンセント(図示せず)に差込み、ダイヤル51を回動操作して電圧を調整し、調整器5の電源スイッチ(図示せず)をONにしてヒ−タ−3で容器Bを加熱し、従来と全く同様に反応,分留,抽出その他の各種の理化学実験を行なうものである。
【0021】
図4は本発明のマントルヒ−タ−の他の実施の形態を示す縦断面図である。この実施の形態のマントルヒ−タ−は炉台1内にセンサ−挿入管6を設けた構成に特徴がある。即ち、上端を開口すると共に下端を底板61で閉塞した適当な径及び長さの管62で構成したセンサ−挿入管6を設け、この挿入管6の上端を天板12から上方へ開口すると共に筒状胴部11内と気密性を保持して管62の上端を天板12に固着して取付け、挿入管6へ熱電対等の温度センサ−63を出し入れ自在に挿入し、炉台1内の温度をセンサ−63で検知させ得るように構成したものである。図4において64は前記センサ−63とコ−ド65で接続したSSR(温度調整器)、66はSSR64とコ−ド67で接続した中継器、68は中継器66と接続したコ−ド69の先端に取付けた差込プラグを示す。他の構成は図1の実施の形態と同一であるため、同一構成部分に同一符号を付して説明を省略する。
【0022】
図4の実施の形態のマントルヒ−タ−は上記のように構成し、SSR64を操作して温度を設定し、コ−ド35のプラグ37を中継器66のコンセント(図示せず)に差込むと共に中継器66のプラグ68を電源コンセントに差込み、また、センサ−63を挿入管6へ挿入し、中継器66の電源スイッチ(図示せず)をONにしてヒ−タ−3で容器Bを加熱し、前記と同様に各種の理化学実験を行なうものである。この実施の形態のマントルヒ−タ−によれば、炉台1内の温度がSSR64の設定温度に達すると、これを指令して中継器66のスイッチ回路(図示せず)をOFF(又はON)にする。したがって、この実施の形態によればヒ−タ−3による加熱部13の加熱温度を設定して自動的に調整することができる。
【0023】
【発明の効果】
本発明によれば次のような効果を奏する。(1)使用中にフラスコ等が破損したり、サンプルが吹きこぼれれても、サンプルが炉台内に浸入するのを防止できる。(2)炉台の上部側から炉台内へガスが流通するのをシャットアウトしているので、実験室内のアルコ−ル類等を含むガス雰囲気が炉台内に入って発火する危険性を防止する。(3)炉台の筒状胴部の外側部は防熱用の被覆筒体で被覆され、これが防熱用として作用するので、使用中に手などが接触して火傷するのを防止する。(4)請求項2記載の発明によれば、前記効果に加え、温度センサ−で炉台内の温度を検知できるので、加熱温度を設定して自動的に調整することがきる。(5)請求項3記載の発明によれば、前記効果に加え、炉台全体が外部とのガス通流性をシャットアウトされているので、実験室内のガス雰囲気が炉台の底部側から炉台内へ入るのを防止できる。
【図面の簡単な説明】
【図1】本発明のマントルヒ−タ−の一実施の形態を示す縦断面図。
【図2】同上マントルヒ−タ−の被覆筒体の上端側の取付固定部分を拡大して示す縦断面図。
【図3】同上マントルヒ−タ−のコ−ドの導出部分を拡大して示す縦断面図。
【図4】本発明のマントルヒ−タ−の他の実施の形態を示す縦断面図。
【図5】従来のマントルヒ−タ−を示す縦断面図。
【符号の説明】
1…炉台 12…天板
2…充填材 13…加熱部
3…ヒ−タ− 14…底蓋部材
4…防熱用の被覆筒体 41…筒状の空間部
11…筒状胴部 B…実験用ガラス器具の容器
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mantle heater for heating a container of a laboratory glassware such as a flask or a beaker in various physics and chemistry experiments.
[0002]
[Prior art]
Mantle heaters are widely used as heaters in reactions, fractional distillation, extraction and other physics and chemistry experiments. As a conventional mantle heater, for example, the one shown in FIG. 5 is generally known. As shown in the figure, this conventional mantle heater has a hemispherical shape having a shape that matches the shape of the lower half of the container B of a laboratory glassware such as a flask in the upper center of the heat-resistant furnace A. In addition to forming the heating part C, the heater D is embedded around the heating part C, the lower half of the container B is accommodated in the heating part C, placed, and heated. It is configured. Further, the hearth A is accommodated in an exterior container E made of a metal plate or the like, and an annular flange F bent inward is formed at the upper end of the opening of the container E. Is pressed against the furnace table A. In the figure, G indicates a power switch, and H indicates a plug. In addition, although the mantle heater of FIG. 3 illustrated what accommodated the furnace stand A in the container E, there exist some which are not equipped with the container E. FIG.
[0003]
[Problems to be solved by the invention]
The conventional mantle heater has the following problems. That is, the furnace bed A is constructed by overlaying cloth materials such as glass wool, rock wool, and ceramic fibers, and has air permeability (gas flowability). And, since the most part of the upper end side including the heating part C is exposed to the outside, the furnace table A is exposed to the outside. For example, when the flask is damaged during use or the sample (liquid) is blown out, the sample is If the sample is an alcohol or the like, it may ignite when it penetrates into A and reaches the heater D to cause corrosion of the heater (nichrome wire). Further, it is often seen that the gas atmosphere in the laboratory contains an alcohol gas such as ether, but the conventional mantle heater has a gas flow from the upper part of the furnace A to the furnace. For this reason, it has been pointed out that there is a danger because it is the same as an open flame.
[0004]
The present invention has been made in view of the above circumstances, and it is possible to prevent the sample from entering the furnace table even when the container of the experimental glassware such as the flask is broken or the sample is blown out. An object of the present invention is to provide a mantle heater capable of preventing the indoor gas atmosphere from entering the inside of the furnace table from the upper side.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, one of the present inventions (first invention) is to close the upper end of the cylindrical body portion while maintaining airtightness with a top plate, and at the central portion of the top plate. A furnace plate made of a metal plate forming a heating part,
A heater disposed in the furnace bed and heating the heating unit;
Covering the outer surface of the body part, and comprising a heat-insulated covering cylinder fixedly mounted on the body part,
The heating part is formed by denting the top plate into a shape substantially corresponding to the shape of the lower half of the container of the laboratory glassware,
The heater Yes to only set by insulated from the heating unit,
The lower end of the trunk is airtightly closed with a bottom cover member,
The lead wire of the heater is led out of the body while maintaining airtightness ,
It is characterized by that.
[0006]
When configured as described above, the upper side of the furnace base is hermetically sealed with the outside completely maintained, so even if the flask or the like breaks or spills during use, the sample enters the furnace base. To prevent. In addition, since the gas is circulated from the upper side of the furnace table into the furnace table, the risk of a gas atmosphere such as alcohol in the laboratory entering the furnace table and catching fire is prevented. Furthermore, since the outer part of the cylindrical body of the furnace bed is covered with a covering cylinder, and this acts as a heat shield, it prevents the hand and the like from being in contact and being burned during use.
Furthermore, since the lower end of the trunk is hermetically closed with a bottom cover member as described above, and the lead wire is led out of the trunk while maintaining the hermeticity, the entire furnace base is externally connected. The gas flow is shut out.
[0007]
Another invention of the present invention (second invention) is the mantle heater according to the first invention, wherein the heating section is formed by recessing the top plate into a semi-spherical shape. .
[0008]
Still another invention of the present invention (third invention) is the mantle heater according to the first invention, wherein the heating section is formed by denting the top plate into a cylindrical shape. And
[0009]
Still another invention of the present invention (fourth invention) is the mantle heater according to any one of the first to third inventions, wherein the upper end is opened to the upper side of the top plate and A sensor insertion tube provided in the furnace stand while maintaining airtightness is provided. If comprised in this way, since temperature sensors, such as a thermocouple, can be inserted in the said insertion pipe, and the temperature in a furnace stand can be detected, it can utilize for the setting, adjustment, etc. of heating temperature.
[0010]
In the present invention, the furnace can be filled with a filler. Although the raw material of this filler is not specifically limited, For example, a heat-resistant and insulating cotton-like member and the like can be employed.
In the present invention, the coating cylinder may be comprised of a gold net material or porous metal plate. When this configuration is adopted, the heat dissipation action is improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a mantle heater according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view showing a mounting and fixing portion on the upper end side of the covering cylinder of the mantle heater. 3 is an enlarged longitudinal sectional view showing the lead-out portion of the mantle heater code. The mantle heater of this embodiment is provided on the outer side of the furnace base 1, the filler 2 filled in the furnace base 1, the heater 3 provided in the furnace base 1, and the outside of the furnace base 1. And a coated cylinder 4 for heat protection.
[0012]
The furnace is made of an iron plate or other metal plate, and the top plate 12 keeps the upper end of a cylindrical body 11 having a desired size, such as a cylindrical or rectangular tube (cylindrical in this embodiment). The heating unit 13 is formed in the central portion of the top plate 12 while being closed. Although the hearth 1 of this embodiment has been disclosed in which the body 11 and the top plate 12 are integrally formed, they can be configured separately and fixed together by welding or the like.
[0013]
The heating unit 13 is formed by indenting the top plate 12 into a shape substantially corresponding to the shape of the lower half of the container B of a flask, beaker or other laboratory glassware. The heating part 13 of the form is formed by recessing the central part of the top plate 12 into a semispherical shape and configured for a flask. In this case, for example, when configured for a container such as a beaker, the heating unit 13 can be formed in a cylindrical shape or the like.
[0014]
In the furnace 1 of this embodiment, the lower end of the body portion 11 is airtightly closed with a bottom cover member 14 made of a metal plate. The illustrated bottom lid member 14 is configured by closing the upper end of a cylindrical body 15 fitted in the body portion 11 with a top plate 16, and fitting the bottom lid member 14 to the lower end portion of the body portion 11 to form a cylindrical body. The lower end of 15 is hermetically fixed 17 to the lower end of the body 11 by welding or the like, and the top plate 16 constitutes the bottom plate.
[0015]
In this embodiment, the filler 2 is composed of glass wool, rock wool, or other heat-resistant and insulating cotton-like member 21, and this furnace-like member 21 is filled in the furnace table 1. It is provided.
[0016]
The heater-3 is made of a nichrome wire or the like, and is disposed around the heating unit 13 and insulated from the heating unit 13 and provided in the furnace 1. The lead wire 31 of the heater 3 is led out of the body 11 while maintaining airtightness. In this embodiment, a screw cylinder 32 is fixed to the body portion 11 while maintaining airtightness and is protruded, and a screw member 34 having a code insertion hole 33 is screwed into the screw cylinder 32 so as to be read. The cord 35 connected to the wire 31 is passed through the screw cylinder 32 and the hole 33 of the screw member 34, and the screw member 34 is tightened to press the O-ring 36 provided in the screw cylinder 32, thereby the code. The 35 insertion portions are sealed by an O-ring 36 and fixed. As a result, the cord 35 connected to the lead wire 31 is led out of the body 11 while maintaining airtightness. In this embodiment, a cord (covered electric wire) in which a conductive wire is covered with a heat-resistant protective coating (rubber material) is used as the cord 35. Reference numeral 37 denotes an insertion plug attached to the tip of the cord 35, 38 denotes an earth wire, and one end of the earth wire 38 is fixedly attached 39 to the body 11.
[0017]
The bottom cover member 14 is fitted and fixed 17 to the body 11 after completing the mounting operation of the heater 3 and the filling operation of the filler 2 and other required operations. In addition, although the heater 3 of this embodiment is illustrated as being composed of a nichrome wire or the like, any heater other than a nichrome wire can be used as the heater, and the heater 13 It can also be provided so as to be arranged in the entire furnace frame 1 including the periphery. When this configuration is adopted, even if the heater-3 is turned off, the remaining heat remains in the furnace stand 1, so that filling of the filler 2 can be omitted.
[0018]
The coated cylinder 4 is for blocking the heat of the body 11 and preventing burns due to contact with hands during use. The cylinder 4 of this embodiment is made of a wire mesh material or a porous metal. A cylindrical (in this embodiment, cylindrical) space 41 is formed between the outer surface of the body 11 and is fixedly mounted on the body 11. As a result, the outer portion of the body portion 11 is covered with the cylinder body 4 with the space portion 41 interposed therebetween, so that the heat of the body portion 11 is radiated through the space portion 41 and is not transferred to the cylinder body 4. It is like that. In this case, the cylindrical body 4 can be made of a heat insulating material without providing the space portion 41, and the body portion 11 can be directly covered and fixedly mounted.
[0019]
The coated cylinder 4 of this embodiment is composed of a rectangular wire net 42 having a predetermined width and length. Then, spacer members 43 and 44 made of heat-resistant rubber material are provided around the outer surface of the upper end portion and the lower end portion of the body portion 11, and the spacer members 43 and 44 are interposed therebetween. The body 11 is covered with the metal mesh material 42 in a cylindrical shape to form the covered cylinder 4, and metal belts 45 and 46 are wound around the upper end and the lower end of the cylinder 4 to tighten the fastener ( The cylindrical body 4 is fixedly attached to the body 11 by tightening the belts 45 and 46 by a not shown. A packing member 47 made of an elastic material such as a rubber material is interposed between the upper and lower ends of the cylindrical body 4 and the belts 45 and 46. Further, a hole 48 into which the screw cylinder 32 is inserted is formed in a predetermined portion of the wire mesh member 42. In FIG. 1, 5 is a voltage regulator, 51 is a voltage adjustment dial provided in the regulator 5, 52 is a cord, and 53 is an insertion plug attached to the tip of the cord.
[0020]
The mantle heater of this embodiment is configured as described above, and the plug 53 of the voltage regulator 5 is inserted into a power outlet (not shown) and the plug 37 of the cord 35 is plugged into the outlet of the voltage regulator 5. (Not shown), the dial 51 is rotated to adjust the voltage, the power switch (not shown) of the regulator 5 is turned on, and the container B is heated by the heater-3. In the same way, various physics and chemistry experiments such as reaction, fractionation, extraction and so on are performed.
[0021]
FIG. 4 is a longitudinal sectional view showing another embodiment of the mantle heater according to the present invention. The mantle heater of this embodiment is characterized by a structure in which a sensor insertion tube 6 is provided in the furnace bed 1. That is, a sensor-insertion tube 6 having a pipe 62 having an appropriate diameter and length with the upper end opened and the lower end closed with the bottom plate 61 is provided, and the upper end of the insertion tube 6 is opened upward from the top plate 12. Maintaining airtightness with the inside of the cylindrical body 11, the upper end of the tube 62 is fixedly attached to the top plate 12, and a temperature sensor 63 such as a thermocouple is inserted into the insertion tube 6 so as to be freely inserted and removed. Can be detected by the sensor -63. In FIG. 4, 64 is an SSR (temperature regulator) connected to the sensor 63 and the code 65, 66 is a relay connected to the SSR 64 and the code 67, and 68 is a code 69 connected to the relay 66. An insertion plug attached to the tip of is shown. Since the other configuration is the same as that of the embodiment of FIG. 1, the same components are denoted by the same reference numerals and description thereof is omitted.
[0022]
The mantle heater of the embodiment of FIG. 4 is configured as described above, the temperature is set by operating the SSR 64, and the plug 37 of the code 35 is inserted into the outlet (not shown) of the repeater 66. At the same time, the plug 68 of the repeater 66 is inserted into a power outlet, the sensor 63 is inserted into the insertion tube 6, the power switch (not shown) of the repeater 66 is turned on, and the container B is heated with the heater-3. Various physicochemical experiments are performed in the same manner as described above. According to the mantle heater of this embodiment, when the temperature in the furnace bed 1 reaches the set temperature of the SSR 64, this is commanded to turn off (or turn on) the switch circuit (not shown) of the repeater 66. To do. Therefore, according to this embodiment, the heating temperature of the heating unit 13 by the heater 3 can be set and automatically adjusted.
[0023]
【The invention's effect】
The present invention has the following effects. (1) Even if a flask or the like breaks during use or a sample is blown out, the sample can be prevented from entering the furnace bed. (2) Since the gas is circulated from the upper side of the furnace table into the furnace table, the risk that a gas atmosphere including alcohol in the laboratory enters the furnace table and ignites is prevented. (3) The outer side portion of the cylindrical body of the furnace is covered with a heat-resistant coated cylinder, which acts as a heat-proof material, and prevents hands and the like from being burned by contact during use. (4) According to the invention described in claim 2, in addition to the above effect, the temperature in the furnace can be detected by the temperature sensor, so that the heating temperature can be set and automatically adjusted. (5) According to the invention described in claim 3, in addition to the above effect, the entire furnace base is shut out of the gas flow with the outside, so that the gas atmosphere in the laboratory flows from the bottom side of the furnace base into the furnace base. It can be prevented from entering.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a mantle heater according to the present invention.
FIG. 2 is an enlarged longitudinal sectional view showing a mounting and fixing portion on the upper end side of the covering cylinder of the mantle heater.
FIG. 3 is an enlarged longitudinal sectional view showing a lead-out portion of the mantle heater code.
FIG. 4 is a longitudinal sectional view showing another embodiment of the mantle heater according to the present invention.
FIG. 5 is a longitudinal sectional view showing a conventional mantle heater.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Furnace 12 ... Top plate 2 ... Filler 13 ... Heating part 3 ... Heater 14 ... Bottom cover member 4 ... Heat-insulated covering cylinder 41 ... Cylindrical space part 11 ... Cylindrical trunk part B ... Experiment Glassware container

Claims (4)

筒状胴部の上端を天板で気密性を保持して閉塞すると共に前記天板のほゞ中央部に加熱部を形成した金属板製の炉台と、
前記炉台内に配置され、前記加熱部を加熱するヒーターと、
前記胴部の外側面を被覆して、前記胴部に固定装着した防熱用の被覆筒体とを備え、
前記加熱部は前記天板を実験用ガラス器具の容器のほゞ下半部の形状とほゞ対応する形状に凹ませて形成され、
前記ヒーターは前記加熱部と絶縁させて設けてあり、
前記胴部の下端は底蓋部材で気密に閉塞され、
前記ヒーターのリード線は気密性を保持して前記胴部外に導出されている
ことを特徴とする、マントルヒーター。
A furnace plate made of a metal plate that closes the upper end of the cylindrical body portion while maintaining airtightness with a top plate and forms a heating part at the center of the top plate,
A heater disposed in the furnace bed and heating the heating unit;
Covering the outer surface of the body part, and comprising a heat-insulated covering cylinder fixedly mounted on the body part,
The heating part is formed by denting the top plate into a shape substantially corresponding to the shape of the lower half of the container of the laboratory glassware,
The heater Yes to only set by insulated from the heating unit,
The lower end of the trunk is airtightly closed with a bottom cover member,
The lead wire of the heater is led out of the body while maintaining airtightness ,
A mantle heater characterized by that .
前記加熱部は、前記天板を半円球状に凹ませて形成されていることを特徴とする、請求項1に記載のマントルヒーター The mantle heater according to claim 1, wherein the heating unit is formed by denting the top plate into a semi-spherical shape . 前記加熱部は、前記天板を円筒形状に凹ませて形成されていることを特徴とする、請求項1に記載のマントルヒーター。The mantle heater according to claim 1, wherein the heating unit is formed by denting the top plate into a cylindrical shape. 請求項1ないし3のいずれかに記載のマントルヒーターにおいて、上端を前記天板の上方側へ開口すると共に前記胴部内と気密性を保持して前記炉台内に設けたセンサー挿入管を備えていることを特徴とするマントルヒーター。The mantle heater according to any one of claims 1 to 3, further comprising: a sensor insertion tube provided in the furnace table with an upper end opened to an upper side of the top plate and airtight with the body portion. A mantle heater characterized by that.
JP2000057867A 2000-01-27 2000-01-27 Mantle heater Expired - Lifetime JP4370545B2 (en)

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DE202014007322U1 (en) * 2014-09-08 2015-12-09 Innovative ThermoAnalytic Instruments KG Heating hood device with a novel arrangement of the heater
KR101777988B1 (en) * 2017-01-11 2017-09-12 최수혁 Heating mantle for heating flask
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