JPS6134066B2 - - Google Patents
Info
- Publication number
- JPS6134066B2 JPS6134066B2 JP12536279A JP12536279A JPS6134066B2 JP S6134066 B2 JPS6134066 B2 JP S6134066B2 JP 12536279 A JP12536279 A JP 12536279A JP 12536279 A JP12536279 A JP 12536279A JP S6134066 B2 JPS6134066 B2 JP S6134066B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- wall
- heat
- electric heating
- heat radiating
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 26
- 230000005855 radiation Effects 0.000 claims description 21
- 238000005485 electric heating Methods 0.000 claims description 18
- 239000011810 insulating material Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Tunnel Furnaces (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【発明の詳細な説明】
本発明は、電気加熱炉に関し、特に鋼線、鋼帯
上の防蝕層、導線上の絶縁物の如き長尺物を焼付
等するのに用いる電気加熱炉の改良に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric heating furnace, and particularly relates to an improvement in an electric heating furnace used for baking long objects such as steel wires, anti-corrosion layers on steel strips, and insulators on conductive wires. It is something.
長尺物加熱用の電気加熱炉は、一般に筒状の熱
放射性炉内壁とこの炉内壁を囲む断熱材と断熱材
に埋込まれるように炉内壁の外面に取付けられた
電熱線とから成つている。炉内壁内を縦方向に走
行する被加熱長尺物は炉内壁からの幅射熱と炉内
壁から空気層を介しての熱伝達とによつて加熱さ
れる。しかし、このような構造の電気加熱炉では
炉内壁の熱容量が大きいため昇温時間が長くなる
上に炉内壁は電熱線との直接接触によつて加熱さ
れるので電熱線の接触部と非接触部とで温度むら
が生じ、このため熱歪によつて炉が曲つたり、破
損したりすることがあり、また電熱線が断線した
場合には炉全体を分解しない限り電熱線を交換す
ることができなかつた。 Electric heating furnaces for heating long objects generally consist of a cylindrical heat-emitting furnace inner wall, a heat insulating material surrounding the furnace inner wall, and a heating wire attached to the outer surface of the furnace inner wall so as to be embedded in the heat insulating material. There is. A long object to be heated running vertically inside the furnace inner wall is heated by radiation heat from the furnace inner wall and heat transfer from the furnace inner wall via an air layer. However, in an electric heating furnace with this type of structure, the heating time is longer because the heat capacity of the inner wall of the furnace is large, and the inner wall of the furnace is heated by direct contact with the heating wire, so there is no contact with the heating wire. Temperature unevenness occurs between the parts, which can cause the furnace to bend or break due to thermal distortion.If the heating wire breaks, do not replace the heating wire unless the entire furnace is disassembled. I couldn't do it.
本発明の目的は、昇温時間が短かく温度むらを
生じることがなく、且つ電熱線の交換を容易に行
うことができる電気加熱炉を提供することにあ
る。 An object of the present invention is to provide an electric heating furnace that has a short heating time, does not cause temperature unevenness, and allows easy replacement of heating wires.
本発明の実施例を図面を参照して詳細にのべる
と、第１図及び第２図は本発明に係る電気加熱炉
１０の一例を示し、この例では電気加熱炉１０は
遠赤外線加熱炉であるがもちろん他の形態の電気
加熱炉であつてもよい。 Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show an example of an electric heating furnace 10 according to the present invention, and in this example, the electric heating furnace 10 is a far-infrared heating furnace. Of course, other types of electric heating furnaces may be used.
電気加熱炉１０は、ロツクウールの如き断熱材
１２で囲まれた鋼板等の耐熱性材料から成る円筒
形炉内壁１４と、炉内壁１４内に縦方向に摺動自
在に挿入され炉内壁１４の内面１４ａに対し間隔
を保つて保持される熱放射素子１６とを備えてい
る。断熱材１２は同じく鋼板製の炉外壁１８によ
つて覆われている。 The electric heating furnace 10 has a cylindrical furnace inner wall 14 made of a heat-resistant material such as a steel plate surrounded by a heat insulating material 12 such as rock wool, and an inner surface of the furnace inner wall 14 that is slidably inserted vertically into the furnace inner wall 14. The heat radiation element 16 is held at a distance from the heat radiation element 14a. The heat insulator 12 is covered by a furnace outer wall 18 also made of steel plate.
熱放射素子１６は、第２図に示すように、被加
熱物１を通過すべき通路２０ａを内部に有する円
筒形の熱放射板２０とこの熱放射板２０の外面に
取付けられた電熱線２２とから成つている。尚、
熱放射素子はこのように熱放散板２０と電熱線２
２との組合せであつて第２図では総体的に符号１
６を付して示しているが、第１図では電熱線２２
を省略して示している。円筒形の熱放射板２０は
鋼板を成形して形成され、その表面は酸化処理、
黒色処理の如き遠赤外線の放射性を高める処理が
施されている。また、電熱線２２は、この場合に
は、金属外被付無機絶縁電線から成つている。図
示の実施例では、熱放射板２０は２つ割の半円筒
２０Ａ，２０Ｂから成つており、これらの半円筒
２０Ａ，２０Ｂは炉内壁１４の内面に相対して設
けられた縦リブ２４，２４′で区劃された２つの
半円形空間内に挿入される。電熱線２２は、第３
図に示すように、これらの半円筒２０Ａ，２０Ｂ
の外面に縦方向に沿つて延びその両端で折返され
て蛇行している。熱放射板２０を炉内壁１４の内
面１４ａから間隔を保つため熱放射板２０の各半
円筒２０Ａ，２０Ｂの外面に縦方向に延びるスペ
ーサ２６が取付けられている。 As shown in FIG. 2, the heat radiating element 16 includes a cylindrical heat radiating plate 20 having a passage 20a therein through which the object to be heated 1 passes, and a heating wire 22 attached to the outer surface of the heat radiating plate 20. It consists of. still,
The heat radiating element consists of the heat dissipating plate 20 and the heating wire 2 in this way.
It is a combination with 2, and is generally designated by the symbol 1 in Figure 2.
6 is attached, but in Fig. 1, the heating wire 22
are omitted. The cylindrical heat radiation plate 20 is formed by molding a steel plate, and its surface is oxidized.
Treatments to increase far-infrared radiation, such as blackening, are applied. In this case, the heating wire 22 is made of an inorganic insulated wire with a metal jacket. In the illustrated embodiment, the heat radiating plate 20 is composed of two halves of semi-cylinders 20A and 20B, and these semi-cylinders 20A and 20B are provided with vertical ribs 24 and 24 provided opposite to the inner surface of the furnace inner wall 14. It is inserted into two semicircular spaces separated by '. The heating wire 22 is the third
As shown in the figure, these semi-cylinders 20A, 20B
It extends along the outer surface in the vertical direction and is folded back and meandering at both ends. In order to maintain a distance between the heat radiation plate 20 and the inner surface 14a of the furnace inner wall 14, a vertically extending spacer 26 is attached to the outer surface of each half cylinder 20A, 20B of the heat radiation plate 20.
鋼線、鋼帯上に塗布された防蝕層又は導線上に
塗布された絶縁層の如き長尺被加熱物１は第１図
に示すように熱放射素子１６内の通路２０ａを通
過しつつ焼付乾燥するように加熱される。この場
合、熱放射素子１６は炉内壁とは別体として直接
接触していないので従来のように熱容量の大きい
炉内壁に奪われる熱量が減少するため昇温時間が
早く、また炉内壁１４が反射板として作用するの
で炉内壁の空間温度は従来のように炉内壁と電熱
線とが直接接触していたものに比較してより均一
且つ低い温度に保たれるため熱歪による彎曲を生
ずることがない。即ち、従来のように若し炉内壁
１４が電熱線２２と直接接触していると、接触部
の温度が非常に高温となる問題があつたが、本発
明では上記のように炉内壁１４は電熱線２２と直
接接触していないため炉内壁１４の温度を均一且
つ従来よりも相対的に低い温度に保つことができ
る。被加熱物１は熱放射板２０からの遠赤外線の
放射と空気を介して熱伝達とによつて効率よく、
またむらなく加熱される。電熱線２２が断線した
場合には熱放射素子１６を炉内壁１４から抜出し
て容易に交換できる。尚、図示していないが、熱
放射素子１６が炉内壁１４から脱出することがな
いように両端を着脱自在な止め板で保持される。 A long heated object 1, such as a steel wire, a corrosion-resistant layer coated on a steel strip, or an insulating layer coated on a conductive wire, is baked while passing through a passage 20a in the heat radiating element 16, as shown in FIG. heated to dry. In this case, since the heat radiating element 16 is separate from the furnace inner wall and is not in direct contact with the furnace inner wall, the amount of heat taken away by the furnace inner wall, which has a large heat capacity, is reduced, resulting in a faster temperature rise time, and the furnace inner wall 14 is a reflective element. Since it acts as a plate, the space temperature of the furnace inner wall is kept more uniform and lower than in the conventional case where the furnace inner wall and the heating wire were in direct contact, so there is no possibility of bending due to thermal distortion. do not have. That is, if the inner wall 14 of the furnace was in direct contact with the heating wire 22 as in the past, there was a problem that the temperature of the contact part would become extremely high, but in the present invention, the inner wall 14 of the furnace is in direct contact with the heating wire 22. Since it is not in direct contact with the heating wire 22, the temperature of the furnace inner wall 14 can be maintained uniformly and at a relatively lower temperature than before. The object to be heated 1 is efficiently heated by far-infrared radiation from the heat radiation plate 20 and heat transfer through the air.
It also heats up evenly. If the heating wire 22 is broken, the heat radiating element 16 can be pulled out from the furnace inner wall 14 and easily replaced. Although not shown, both ends of the heat radiating element 16 are held by removable stop plates to prevent the heat radiating element 16 from escaping from the furnace inner wall 14.
本発明の具体的な例を掲げると、炉長2000mm、
円筒形の熱放射板２０の内径100mm、炉内壁１４
の内径120mmとして断熱材１２は110mm厚のロツク
ウールを用いた。熱放射板２０は１mm厚の鋼板
SUS304を使用し、その表面に３〜25μの波長の
遠赤外線の分光放射率を0.8以上に高めるため酸
化処理を行つた。また電熱線２２は直径3.2mmの
鋼板SUS304の外被を有する容量4KWのマグネシ
ヤ絶縁ニクロム線とした。炉内壁１４は２mm厚の
鋼板SUS304を用い、その内面に鏡面仕上げを施
した。この炉に通電して炉温を400℃に保つた
が、炉に歪を認めることができなかつた。炉温が
常温から400℃まで上昇する時間は僅か30分であ
つた。また、外径30mm、肉厚３mmの架橋ポリエチ
レンチユーブを炉内に走行させたところチユーブ
は均一に軟化することができた。 Specific examples of the present invention include a furnace length of 2000 mm,
The inner diameter of the cylindrical heat radiation plate 20 is 100 mm, and the inner wall of the furnace 14
The heat insulating material 12 was made of rock wool with a thickness of 110 mm, with an inner diameter of 120 mm. The heat radiation plate 20 is a 1mm thick steel plate.
SUS304 was used, and its surface was oxidized to increase the spectral emissivity of far infrared rays with a wavelength of 3 to 25μ to 0.8 or higher. The heating wire 22 was a magnesia insulated nichrome wire with a capacity of 4KW and having a jacket made of SUS304 steel plate with a diameter of 3.2mm. The furnace inner wall 14 was made of 2 mm thick steel plate SUS304, and its inner surface was mirror-finished. Electricity was applied to this furnace to maintain the furnace temperature at 400°C, but no distortion could be observed in the furnace. It took only 30 minutes for the furnace temperature to rise from room temperature to 400°C. Furthermore, when a cross-linked polyethylene tube with an outer diameter of 30 mm and a wall thickness of 3 mm was run through the furnace, the tube was able to be uniformly softened.
第４図及び第５図の実施例は熱放射板２０が半
円筒でなく円筒であることを除いて第１図乃至第
３図の実施例と同じであり、また第６図の実施例
は炉内壁１４及び熱放射素子１６が断面矩形状で
あることを除いて第１図乃至第３図の実施例と同
じである。第６図の実施例では被加熱物１が図示
のようにストリツプ状である場合に適している。 The embodiment shown in FIGS. 4 and 5 is the same as the embodiment shown in FIGS. 1 to 3 except that the heat radiation plate 20 is a cylinder rather than a semi-cylinder, and the embodiment shown in FIG. The embodiment is the same as the embodiment shown in FIGS. 1 to 3 except that the furnace inner wall 14 and the heat radiating element 16 have a rectangular cross section. The embodiment shown in FIG. 6 is suitable when the object 1 to be heated is in the form of a strip as shown in the figure.
尚、上記実施例では、スペーサ２６はいずれも
熱放射板２０側に設けられているが、第７図に示
すようにこのスペーサ２６は炉内壁１４側に設け
ることもできる。また、熱放射板２０はいずれも
筒状に形成されているが、被加熱物の形態に応じ
てその断面形状は適宜選択できる。 In the above embodiments, the spacers 26 are all provided on the heat radiation plate 20 side, but the spacers 26 may also be provided on the furnace inner wall 14 side as shown in FIG. Further, although the heat radiation plates 20 are all formed in a cylindrical shape, the cross-sectional shape can be appropriately selected depending on the form of the object to be heated.
本発明によれば、上記のように、熱放射素子を
炉内壁とは別体にして両者が直接接触することが
ないようにしたので熱容量の大きい炉内壁に奪わ
れる熱量が減少し、炉の昇温時間を短くすること
ができるから熱効率を向上することができ、また
従来のように電熱線と炉内壁との接触部と非接触
部とで温度むらが発生する現象が防止されるため
被加熱物を均一に加熱することができ、更に温度
むらが防止されることによつて炉内壁を含む炉体
は従来に比較して相対的に低い温度に保たれるの
で熱歪による変形、破損を生ずることがない。ま
た、熱放射素子は取外自在であるので電熱線の断
線等による修理、維持を容易に行うことができ
る。 According to the present invention, as described above, since the heat radiating element is made separate from the furnace inner wall so that the two do not come into direct contact, the amount of heat taken away by the furnace inner wall, which has a large heat capacity, is reduced, and the furnace Thermal efficiency can be improved because the heating time can be shortened, and the phenomenon in which temperature unevenness occurs between the contact area and the non-contact area between the heating wire and the inner wall of the furnace, which was the case in the past, can be prevented. The object to be heated can be heated uniformly, and by preventing temperature unevenness, the furnace body including the inner wall of the furnace can be kept at a relatively low temperature compared to conventional methods, preventing deformation and damage due to thermal strain. will not occur. Furthermore, since the heat radiating element is removable, repairs and maintenance due to breakage of heating wires, etc. can be easily performed.
第１図及び第２図は本発明に係る電気加熱炉の
一実施例の縦断面図及び横断面図、第３図は熱放
射板の一半部の斜視図、第４図は本発明の他の実
施例の横断面図、第５図は第４図の実施例で用い
られる熱放射板の斜視図、第６図は本発明の他の
実施例の概略横断面図、第７図は本発明の更に他
の実施例の一部の横断面図である。
１……被加熱物、１０……電気加熱炉、１２…
…断熱材、１４……炉内壁、１４ａ……内面、１
６……熱放射素子、２０……熱放射板、２０ａ…
…通路、２０Ａ，２０Ｂ……半円筒、２２……電
熱線、２６……スペーサ。
1 and 2 are longitudinal and cross sectional views of an embodiment of an electric heating furnace according to the present invention, FIG. 3 is a perspective view of a half of a heat radiation plate, and FIG. 4 is a diagram showing an embodiment of an electric heating furnace according to the present invention. FIG. 5 is a perspective view of a heat radiation plate used in the embodiment of FIG. 4, FIG. 6 is a schematic cross-sectional view of another embodiment of the present invention, and FIG. FIG. 7 is a cross-sectional view of a portion of yet another embodiment of the invention. 1...Object to be heated, 10...Electric heating furnace, 12...
...Insulating material, 14...Furnace inner wall, 14a...Inner surface, 1
6... Heat radiation element, 20... Heat radiation plate, 20a...
...Passway, 20A, 20B...Semi-cylinder, 22...Heating wire, 26...Spacer.
Claims (1)
縦方向に摺動自在に挿入され前記炉内壁の内面に
対し間隔を保つて保持される熱放射素子とを備
え、前記熱放射素子は被加熱物が通過すべき通路
に面する熱放射板と前記熱放射板の外面に取付け
られた電熱線とから成つていることを特徴とする
電気加熱炉。 ２ 前記熱放射板は筒状で縦割されている特許請
求の範囲第１項に記載の電気加熱炉。 ３ 前記熱放射板は筒状で前記炉内壁に間隔を保
つためのスペーサを外面に有する特許請求の範囲
第１項又は第２項に記載の電気加熱炉。 ４ 前記炉内壁は前記熱放射板を間隔を保つため
のスペーサを内面に有する特許請求の範囲第１項
又は第２項に記載の電気加熱炉。 ５ 前記炉内壁及び熱放射板は断面円形である特
許請求の範囲第１項乃至第４項のいずれかに記載
の電気加熱炉。 ６ 前記炉内壁及び熱放射板は断面矩形状である
特許請求の範囲第１項乃至第４項のいずれかに記
載の電気加熱炉。[Claims] 1. A furnace inner wall surrounded by a heat insulating material, and a heat radiating element that is vertically slidably inserted into the furnace inner wall and held at a distance from the inner surface of the furnace inner wall. An electric heating furnace, characterized in that the heat radiating element comprises a heat radiating plate facing a passage through which the object to be heated passes, and a heating wire attached to the outer surface of the heat radiating plate. 2. The electric heating furnace according to claim 1, wherein the heat radiation plate is cylindrical and vertically divided. 3. The electric heating furnace according to claim 1 or 2, wherein the heat radiating plate is cylindrical and has a spacer on its outer surface for maintaining a distance from the inner wall of the furnace. 4. The electric heating furnace according to claim 1 or 2, wherein the furnace inner wall has a spacer on the inner surface for maintaining a distance between the heat radiating plates. 5. The electric heating furnace according to any one of claims 1 to 4, wherein the furnace inner wall and the heat radiation plate have a circular cross section. 6. The electric heating furnace according to any one of claims 1 to 4, wherein the furnace inner wall and the heat radiation plate have a rectangular cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12536279A JPS5649879A (en) | 1979-10-01 | 1979-10-01 | Electrically heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12536279A JPS5649879A (en) | 1979-10-01 | 1979-10-01 | Electrically heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5649879A JPS5649879A (en) | 1981-05-06 |
| JPS6134066B2 true JPS6134066B2 (en) | 1986-08-05 |
Family
ID=14908250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12536279A Granted JPS5649879A (en) | 1979-10-01 | 1979-10-01 | Electrically heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5649879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228056A (en) * | 1988-07-15 | 1990-01-30 | Toshiba Corp | Air conditioner for vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1249047B (en) * | 1991-02-21 | 1995-02-11 | Zambon Spa | PHARMACEUTICAL COMPOSITION FOR THE TREATMENT OF CATARACT |
| JP6638422B2 (en) * | 2016-01-26 | 2020-01-29 | 日立金属株式会社 | Method and apparatus for producing enameled wire |
-
1979
- 1979-10-01 JP JP12536279A patent/JPS5649879A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228056A (en) * | 1988-07-15 | 1990-01-30 | Toshiba Corp | Air conditioner for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5649879A (en) | 1981-05-06 |
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