CN102367511B - Electric heating roller steel strip continuous heating furnace - Google Patents
Electric heating roller steel strip continuous heating furnace Download PDFInfo
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- CN102367511B CN102367511B CN 201110327043 CN201110327043A CN102367511B CN 102367511 B CN102367511 B CN 102367511B CN 201110327043 CN201110327043 CN 201110327043 CN 201110327043 A CN201110327043 A CN 201110327043A CN 102367511 B CN102367511 B CN 102367511B
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- roller assembly
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- steel band
- rotating cylinder
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Abstract
The invention provides an electric heating roller steel strip continuous heating furnace. The continuous heating furnace comprises a heat-insulation cabinet, and a first heating roller component and a second heating roller component which are arranged in the heat-insulation cabinet and have the same structure, wherein the outsides of the first heating roller component and the second heating roller component are both provided with rotary drums, a steel strip is wound on each rotary drum, the first heating roller component is arranged on the upper left side of the second heating roller component, a steel strip inlet is arranged on the lower left side of the heat-insulation cabinet, a steel strip outlet is arranged on the upper right side of the heat-insulation cabinet, the steel strip is wound from the bottom to the top of the rotary drum of the second heating roller component and then is wound from the bottom to the top of the rotary drum of the first heating roller component, and the steel strip is wound on each rotary drum like a lateral 8 shape. Therefore, the contact area of the steel strip and each rotary drum is more than two thirds of the rotary drum area; the electric heating roller steel strip continuous heating furnace has small volume and low heat loss, the heat efficiency can reach above 90%; and the continuous heating furnace is convenient in use.
Description
Technical field
The present invention relates to the steel band Field of Heat-treatment, be specifically related to a kind of electric heating roller continuous reheating furnace for steel strip.
Background technology
All will be at first to the steel band heating during steel band thermal treatment, making its metaplasia is austenite.The steel band heating is generally all with resistance furnace or radiant-type furnace, and these equipment are huge, and area of dissipation is large, and thermosteresis is large, and thermo-efficiency is low.Take resistance furnace as example, behind its resistance heating power, at first by thermal radiation the refractory brick around it is heated to more than 1000 degree, muffle tube is heated to more than 900 degree by thermal radiation by refractory brick again, by thermal radiation the steel band in the muffle tube is heated to the 840-870 degree by muffle tube again, the heat transfer rate of thermal radiation itself is just slow, add again and want the Multi-stage heat radiation, therefore the rate of heating of steel band is very slow, this makes use of momentum and necessaryly does stove very longly, and general resistance furnace is wide approximately 1.5 meters, be about 11 to 13 meters, its area of dissipation is large, thereby thermosteresis is very large, and its thermo-efficiency only has 35-45%.The thermal inertia of this stove is very large, and temperature change is very difficult, operates very inconvenient.Save energy is the long-range ruse of war of national economic development, and steel band thermal treatment will consume mass energy, energy-conservationly just seems especially important, concerning an enterprise, energy-conservationly can reduce product cost, improves the market competitiveness.
At present existing patent that the patent No. is " the direct heat transfer steel strip heating furnace " of " 200910197945.6 ", it is by being set up in parallel a plurality of warming mills, steel band is heated on the electric roller with serpentine, although its thermo-efficiency is higher than resistance furnace, but this device has following shortcoming: the one, steel band with serpentine on electric roller, the contact area of steel band and electric roller only accounts for about 1/3rd of electric roller area like this, because contact area is little, heat-transfer effect will be owed, certainly will a plurality of warming mills to be set, this will increase the length of process furnace, increases thermal losses, has reduced the thermo-efficiency of process furnace; The 2nd, the Insulation of steel band is owed, and makes the thermosteresis of process furnace large, thereby has more reduced the thermo-efficiency of process furnace; The 3rd, connect the steel band difficulty, use inconvenient.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of electric heating roller continuous reheating furnace for steel strip, and volume is little, and thermosteresis is little, and thermo-efficiency can reach more than 90%, and easy to use.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: a kind of electric heating roller continuous reheating furnace for steel strip, comprise insulation can, be located at the first identical heating roller assembly of insulation can inner structure and the second heating roller assembly, the outside of the outside of described the first heating roller assembly and the second heating roller assembly is equipped with rotating cylinder, be wound with steel band on the described rotating cylinder, described the first heating roller assembly is located at the upper left side of the second heating roller assembly, the ingress of described steel band is located at the bottom, left side of insulation can, the exit of described steel band is located at the right upper portion of insulation can, described steel band moves into the top from the bottom of the rotating cylinder of the second heating roller assembly and lays out, move into the top from the bottom of the rotating cylinder of the first heating roller assembly again and lay out, steel band is the horizontal figure of eight on rotating cylinder.So that the contact area of steel band and rotating cylinder accounts for more than 2/3rds of rotating cylinder area, improved thermo-efficiency.
As preferably, described the first heating roller assembly comprises stationary shaft, be fixed on electric pipe holder on the stationary shaft, be fixed on the electrothermal tube on the electric pipe holder, described rotating cylinder is located at the electrothermal tube outside, and described electrothermal tube adopts the vitrified pipe structure, and resistive heater is housed in the electrothermal tube.Simple in structure, easily manufactured.
As preferably, described stationary shaft adopts the hollow steel pipe structure, and the electric wire of described resistance wire is drawn with power supply from the stationary shaft center and joined.
As preferably, be provided with the first insulating cotton layer between described stationary shaft and the electric pipe holder, the outer side wall of described the first insulating cotton layer is provided with the first reflector.The infrared reflection telegram in reply heat pipe that the first reflector inwardly distributes electrothermal tube to increase the heat-insulating property of stationary shaft, reduces the temperature of stationary shaft.
As preferably, be provided with the second insulating cotton layer between described insulation can and the first heating roller assembly, the second heating roller assembly and the steel band, the inner side-wall of described the second insulating cotton layer is provided with the second reflector.The second reflector returns steel band to the infrared reflection that high-temperature steel belt sends, and reduces thermosteresis, has improved the thermo-efficiency of steel band heating.
As preferably, described the first heating roller assembly and the second heating roller assembly are located at the left side in the insulation can.So that one section space is left on the insulation can right side, guaranteed that steel band has the time of one section samming insulation.
As preferably, the exit near steel band on the described insulation can is provided with protection gas import and infra-red thermometer.Protection gas import passes into protection gas and prevents the steel band oxidation, and infra-red thermometer is automatically controlled device with temperature and is connected, and is used for the temperature of automatic control steel strip, makes it remain on the design temperature scope, the automatic control of realization temperature.
As preferably, be provided with bearing between the two ends of described rotating cylinder and the stationary shaft, the two ends of described stationary shaft are erected on the pillar.Reduced the rotary resistance of rotating cylinder.
Beneficial effect:
The present invention adopts technique scheme that a kind of electric heating roller continuous reheating furnace for steel strip is provided, and volume is little, and thermosteresis is little, and thermo-efficiency can reach more than 90%, and easy to use.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sectional view of A-A face among Fig. 1.
Embodiment
As depicted in figs. 1 and 2, a kind of electric heating roller continuous reheating furnace for steel strip, comprise insulation can 2, be located at the first identical heating roller assembly 3 of insulation can 2 inner structures and the second heating roller assembly 4, the outside of the outside of described the first heating roller assembly 3 and the second heating roller assembly 4 is equipped with rotating cylinder 8, be wound with steel band 1 on the described rotating cylinder 8, described the first heating roller assembly 3 is located at the upper left side of the second heating roller assembly 4, the ingress of described steel band 1 is located at the bottom, left side of insulation can 2, the exit of described steel band 1 is located at the right upper portion of insulation can 2, described steel band 1 moves into the top from the bottom of the rotating cylinder 8 of the second heating roller assembly 4 and lays out, move into the top from the bottom of the rotating cylinder 8 of the first heating roller assembly 3 again and lay out, steel band 1 is the horizontal figure of eight on rotating cylinder 8.Described the first heating roller assembly 3 comprises stationary shaft 5, be fixed on electric pipe holder 6 on the stationary shaft 5, be fixed on the electrothermal tube 7 on the electric pipe holder 6, described rotating cylinder 8 is located at electrothermal tube 7 outsides, described electrothermal tube 7 adopts the vitrified pipe structure, and resistive heater 9 is housed in the electrothermal tube 7.Described stationary shaft 5 adopts the hollow steel pipe structure, and the electric wire of described resistance wire 9 is drawn with power supply 16 from stationary shaft 5 centers and joined.Be provided with the first insulating cotton layer 10 between described stationary shaft 5 and the electric pipe holder 6, the outer side wall of described the first insulating cotton layer 10 is provided with the first reflector 11.Be provided with the second insulating cotton layer 12 between described insulation can 2 and the first heating roller assembly 3, the second heating roller assembly 4 and the steel band 1, the inner side-wall of described the second insulating cotton layer 12 is provided with the second reflector 13.Described the first heating roller assembly 3 and the second heating roller assembly 4 are located at the left side in the insulation can 2.Exit near steel band 1 on the described insulation can 2 is provided with protection gas import 14 and infra-red thermometer 15.Be provided with bearing 17 between the two ends of described rotating cylinder 8 and the stationary shaft 5, the two ends of described stationary shaft are erected on the pillar 18.
During actually operating, steel band 1 with the horizontal figure of eight on the rotating cylinder 8 of the first hot-rolling assembly 3 and the second heating roller assembly 4, steel band 1 has encased 2/3rds area of the rotating cylinder 8 of the first hot-rolling assembly 3 and the second heating roller assembly 4, after resistive heater 9 energisings in the electrothermal tube 7, by thermal radiation rotating cylinder 8 is heated, transmitted steel band 1 heating by heat by rotating cylinder 8 again, large of the infrared rays that sends after steel band 1 heating is reflected back steel band 1 by the second reflector 13, the infrared rays that electrothermal tube 7 inwardly sends, be reflected back electrothermal tube 7 by the first reflector 11, the such heat that sends of electrothermal tube 7, most sections are absorbed by steel band, and its thermo-efficiency can reach more than 90%.Be provided with bearing 17 between the two ends of rotating cylinder 8 and the stationary shaft 5, rotating cylinder 8 can fricton-tightly rotate with steel band 1 under the pulling of steel band 1, and steel band 1 just can not pulled.The second reflector 13 can also play the effect that passage is provided when passing process furnace for steel band 1 except having heat insulation function, be conducive to steel band 1 and conveniently pass process furnace.Because rotating cylinder 8 has surrounded whole electrothermal tube 7, and the distance between them is very near, the heat that electrothermal tube 7 sends can be passed to rotating cylinder 8 well; Because steel band 1 contacts with rotating cylinder 8, heat transfer rate is just fast, and contact area is very large, and the effect of heat transfer is very good, and the rate of heating of steel band can be very fast.This rapid heating, on the one hand, the austenite particle that steel band is formed is tiny, makes the martensite lath that forms subsequently tiny, can make after the thermal treatment steel band not only firmly but also flexible, improved the heat treated quality of steel band; On the other hand, the steel band rate of heating is fast, so that the contraction in length of process furnace is about 2.5 meters, can reduce area of dissipation, reduces thermosteresis, also can save space.Fast owing to conducting heat, so that the temperature of resistance wire can not surpass 900 degree, and resistance wire is in the environment of protection gas all the time, is not easy oxidation, therefore the life-span of resistance wire can greatly improve.Inner casing and the shelf of insulation can form with Plate Welding; Shell studs with ceramic tile, and ceramic tile is poor conductor and the surface-brightening of heat, can reduce heat abstraction, is filled with the insulating cotton layer in the insulation can, and insulated capacity is very strong.
Compare with existing resistance furnace, the present invention has the following advantages: thermo-efficiency is high, reaches more than 90%, can save energy more than 60%; Used occupation of land only is 1/5th of resistance furnace; Equipment maintenance cost only is 1/3rd of resistance furnace; Installation cost only is 1/3rd of resistance furnace; This stove can heat many steel bands side by side simultaneously, and production efficiency is high; Use operation easily.
Claims (8)
1. electric heating roller continuous reheating furnace for steel strip, comprise insulation can (2), be located at identical the first heating roller assembly (3) of insulation can (2) inner structure and the second heating roller assembly (4), the outside of the outside of described the first heating roller assembly (3) and the second heating roller assembly (4) is equipped with rotating cylinder (8), be wound with steel band (1) on the described rotating cylinder (8), it is characterized in that: described the first heating roller assembly (3) is located at the upper left side of the second heating roller assembly (4), the ingress of described steel band (1) is located at the bottom, left side of insulation can (2), the exit of described steel band (1) is located at the right upper portion of insulation can (2), described steel band (1) moves into the top from the bottom of the rotating cylinder (8) of the second heating roller assembly (4) and lays out, move into the top from the bottom of the rotating cylinder (8) of the first heating roller assembly (3) again and lay out, steel band (1) is the horizontal figure of eight on rotating cylinder (8).
2. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 1, it is characterized in that: described the first heating roller assembly (3) comprises stationary shaft (5), be fixed on electric pipe holder (6) on the stationary shaft (5), be fixed on the electrothermal tube (7) on the electric pipe holder (6), described rotating cylinder (8) is located at electrothermal tube (7) outside, described electrothermal tube (7) adopts the vitrified pipe structure, and resistive heater (9) is housed in the electrothermal tube (7).
3. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 2, it is characterized in that: described stationary shaft (5) adopts the hollow steel pipe structure, and the electric wire of described resistance wire (9) is drawn with power supply (16) from stationary shaft (5) center and joined.
4. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 2, it is characterized in that: be provided with the first insulating cotton layer (10) between described stationary shaft (5) and the electric pipe holder (6), the outer side wall of described the first insulating cotton layer (10) is provided with the first reflector (11).
5. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 1, it is characterized in that: be provided with the second insulating cotton layer (12) between described insulation can (2) and the first heating roller assembly (3), the second heating roller assembly (4) and the steel band (1), the inner side-wall of described the second insulating cotton layer (12) is provided with the second reflector (13).
6. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 1 is characterized in that: described the first heating roller assembly (3) and the second heating roller assembly (4) are located at the left side in the insulation can (2).
7. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 1 is characterized in that: the upper exit near steel band (1) of described insulation can (2) is provided with protection gas import (14) and infra-red thermometer (15).
8. a kind of electric heating roller continuous reheating furnace for steel strip according to claim 1, it is characterized in that: be provided with bearing (17) between the two ends of described rotating cylinder (8) and the stationary shaft (5), the two ends of described stationary shaft are erected on the pillar (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110327043 CN102367511B (en) | 2011-10-25 | 2011-10-25 | Electric heating roller steel strip continuous heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110327043 CN102367511B (en) | 2011-10-25 | 2011-10-25 | Electric heating roller steel strip continuous heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102367511A CN102367511A (en) | 2012-03-07 |
| CN102367511B true CN102367511B (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110327043 Active CN102367511B (en) | 2011-10-25 | 2011-10-25 | Electric heating roller steel strip continuous heating furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114501705B (en) * | 2020-10-28 | 2023-10-13 | 汉达精密电子(昆山)有限公司 | Energy-saving infrared heating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2370022Y (en) * | 1999-04-30 | 2000-03-22 | 冶金工业部包头钢铁设计研究院 | Annealing device without electric spark |
| ATE368131T1 (en) * | 2004-04-13 | 2007-08-15 | Ohg Di Lesmo S P A | GLOWING DEVICE FOR METAL STRIPS |
| CN101921906A (en) * | 2009-10-30 | 2010-12-22 | 许秀飞 | Direct heat transfer steel strip heating furnace |
| CN202284216U (en) * | 2011-10-25 | 2012-06-27 | 浙江佰耐钢带有限公司 | Electric heating roller continuous reheating furnace for steel strip |
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