CN209386819U - A kind of electric radiation device for heat-treatment furnace - Google Patents
A kind of electric radiation device for heat-treatment furnace Download PDFInfo
- Publication number
- CN209386819U CN209386819U CN201822115593.2U CN201822115593U CN209386819U CN 209386819 U CN209386819 U CN 209386819U CN 201822115593 U CN201822115593 U CN 201822115593U CN 209386819 U CN209386819 U CN 209386819U
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- China
- Prior art keywords
- radiant tube
- heat
- furnace
- treatment furnace
- radiation device
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- 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.)
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Abstract
The utility model relates to a kind of electric radiation devices for heat-treatment furnace, including radiant tube (1), the radiant tube (1) protrudes into furnace interior for radiating, the radiant tube (1) is the internal metal tube without heating wire, radiant tube (1) is located at the open-ended of furnace interior, after radiant tube (1) is powered, directly furnace interior is heated as heater.Compared with prior art, the special construction of the utility model radiant tube reduces the link and thermal resistance of heat transfer, improves heat transfer efficiency；Meanwhile under identical operating temperature, heater surface temperature is reduced, and extends the service life of radiant tube.
Description
Technical field
The utility model relates to a kind of electric radiation devices, fill more particularly, to a kind of electric radiation for heat-treatment furnace
It sets.
Background technique
Heat-treatment furnace uses traditional radiation tube heater at present, and radiant tube usually selects heat-resisting alloy steel to be made, and manages
Interior arrangement heating element, such as resistance wire winding.In the case of powering on, resistance wire, which generates Joule heat, makes heat-treatment furnace heat up.It passes
Uniting, there are heating rate is slow and the problems such as temperature is uniformly poor for radiant tube.Therefore develop that the rate of heat addition can be improved in one kind and furnace temperature is uniform
The new electrically heating radiation appliance of property is very necessary.
Utility model content
The purpose of this utility model is exactly to provide a kind of be used at heat to overcome the problems of the above-mentioned prior art
Manage the electric radiation device of furnace.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of electric radiation device for heat-treatment furnace, including radiant tube, the radiant tube protrude into furnace interior use
In heat dissipation, the radiant tube is the internal metal tube without heating wire, and radiant tube is located at the open-ended of furnace interior, is radiated
After pipe is powered, directly furnace interior is heated as heater.
The radiant tube side wall is provided with thermal conductivity head piece.
Described radiant tube one end is electrode, and the electrode both ends are individually fixed in the guarantor on the outside of furnace shell and on the inside of furnace shell
Warm layer.
First heat Insulation film is installed between the radiant tube and insulating layer, is equipped with second between electrode and furnace shell outside
Heat Insulation film.
First diaphragm seal is installed between the radiant tube and insulating layer, is equipped with second between electrode and furnace shell outside
Diaphragm seal.
The radiant tube be equipped with it is multiple, between each radiant tube by connection sheet series connection.
The wall thickness that the radiant tube is mounted on furnace shell is up big and down small.
Compared with prior art, the utility model has the advantage that
(1) traditional radiant tube structure is by there is a set of resistance wire winding inside radiant tube, and resistance wire passes through thermally conductive and spoke
The modes such as penetrating heat is transmitted to radiant tube increases radiant tube temperature, so radiant tube by it is thermally conductive, radiate and convection type adds
Heated work pieces.There is no heating wire inside this patent radiant tube, directly uses radiant tube as heater, when circuit is connected, electric current passes through
The advantages of generation Joule heat makes radiant tube temperature quickly increase, directly heat radiant tube when radiant tube is to reduce the ring of heat transfer
Section and thermal resistance, improve heat transfer efficiency, and under identical operating temperature, heater surface temperature is reduced, and extend making for radiant tube
Use the service life.
(2) stomata is opened in radiant tube bottom opening, side, and when radiant tube loading current, internal heating rate is faster than outside,
The density contrast of inside and outside gas will lead to the free convection in pipe between gas and the outer gas of pipe, and the heat of radiation pipe internal surface is passed
The defeated outside to pipe.Radiant tube has the characteristic of double-sided heat transfer, and heat transfer area nearly doubles, and the heating speed of stove is therefore
It greatly improves.Simultaneously as reducing the surface power load of radiant tube, considers further that the reduction of calandria surface temperature, make spoke
The service life for penetrating pipe greatly improves.
(3) wall thickness of radiant tube is designed to up big and down small, so that radiant tube internal stress is evenly distributed, is prevented high temperature operating conditions
Creep.
(4) heat Insulation film and gasket are installed between radiant tube and insulating layer, are equipped with absolutely between electrode and furnace shell outside
Backing and gasket guarantee the air-tightness and thermal insulation property of furnace body.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment electric radiation device；
Fig. 2 is the thermal conductivity head piece schematic diagram of the present embodiment electric radiation device radiant tube；
Appended drawing reference:
1 is radiant tube；2 be heat Insulation film；3 be gasket；4 be heat Insulation film；5 be gasket；6 be binding post；7 be electrode；
8 be connection sheet；9 be furnace shell；10 be insulating layer；11 be thermal conductivity head piece.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model
Implemented premised on technical solution, the detailed implementation method and specific operation process are given, but the guarantor of the utility model
Shield range is not limited to the following embodiments.
Embodiment
As shown in Figure 1, 2, a kind of electric radiation device for heat-treatment furnace, including radiant tube 1, radiant tube 1 protrude into furnace
For radiating, radiant tube 1 is the internal metal tube without heating wire in internal portion, and radiant tube 1 is located at the open-ended of furnace interior,
Side wall is provided with thermal conductivity head piece 11, and after radiant tube 1 is powered, the inner surface and the outer surface of radiant tube 1 is used to convert electric energy to thermal energy,
Radiant tube 1 directly heats furnace interior as heater.
The electric radiation device of the present embodiment, using novel radiation pipe structure, different from traditional radiant tube, radiant tube 1
Inside does not have resistance wire winding, and radiant tube 1 itself is exactly heater, and when radiant tube 1 is communicated to power supply, electric current is in radiant tube
Outer wall generates Joule heat, for heating.Radiant tube 1 is made of special electrothermal alloy.Surface area (diameter, length of radiant tube 1
And wall thickness) etc. geometric dimensions according to the power of heating furnace determine.1 one end of radiant tube is electrode 7, and 7 both ends of electrode are individually fixed in
The insulating layer 10 of 9 inside of 9 outside of furnace shell and furnace shell.
First heat Insulation film 2 is installed, electrode 7 and furnace shell are equipped with second between 9 outside between radiant tube 1 and insulating layer 10
Heat Insulation film 4, the fastening and its insulation between furnace shell for guaranteeing electrode 7.First is equipped between radiant tube 1 and insulating layer 10
Diaphragm seal 3, electrode 7 and furnace shell are equipped with the second diaphragm seal 5, the air-tightness of principal security stove between 9 outside.
Radiant tube 1 is mounted on 9 top of furnace shell, and the wall thickness of radiant tube 1 is up big and down small.
The binding post 6 at 7 top of electrode is for connecting to power supply electrode 7.
Radiant tube 1 be equipped with it is multiple, between each radiant tube 1 by connection sheet series connection.
If the outer diameter of radiant tube is φ, the resistance of wall thickness δ, radiant tube are R, and electric current generates Joule heat when passing through radiant tube:
Q=U2/R (1)
The resistance of radiant tube is determined by material and the geometric dimension synthesis of radiant tube, is calculated by formula (2):
R=ρ L/A (2)
In formula, ρ is the resistivity of radiant tube, and L is the length of radiant tube, and A is the sectional area of radiant tube.
Therefore, the structure for simplifying radiant tube than traditional Resistant heating using radiant tube self-heating, reduces spoke
The heat transfer link and thermal resistance for penetrating pipe, reduce the surface temperature of calandria, due to the principle heated simultaneously using inside and outside wall, tube wall
By hot-fluid, from diversion mode, the surface power density of heater can be greatly reduced in internal heat, and that improves radiant tube uses the longevity
Life.Meanwhile heating and cooling velocity are fast, more uniform temperature, longer life expectancy.
Claims (7)
1. a kind of electric radiation device for heat-treatment furnace, including radiant tube (1), the radiant tube (1) protrude into furnace body
Portion is for radiating, which is characterized in that the radiant tube (1) is the internal metal tube without heating wire, and radiant tube (1) is located at furnace
Portion is open-ended in vivo, after radiant tube (1) is powered, directly heats to furnace interior as heater.
2. a kind of electric radiation device for heat-treatment furnace according to claim 1, which is characterized in that the radiation
Pipe (1) side wall is provided with thermal conductivity head piece (11).
3. a kind of electric radiation device for heat-treatment furnace according to claim 1, which is characterized in that the radiation
Managing (1) one end is electrode (7), and the electrode (7) both ends are individually fixed in the heat preservation on the outside of furnace shell (9) and on the inside of furnace shell (9)
Layer (10).
4. a kind of electric radiation device for heat-treatment furnace according to claim 3, which is characterized in that the radiation
It is equipped with the first heat Insulation film (2) between pipe (1) and insulating layer (10), second is equipped between electrode (7) and furnace shell (9) outside absolutely
Backing (4).
5. a kind of electric radiation device for heat-treatment furnace according to claim 3, which is characterized in that the radiation
It is equipped with the first diaphragm seal (3) between pipe (1) and insulating layer (10), it is close to be equipped with second between electrode (7) and furnace shell (9) outside
Mounting (5).
6. a kind of electric radiation device for heat-treatment furnace according to claim 1, which is characterized in that the radiation
Manage (1) be equipped with it is multiple, between each radiant tube (1) by connection sheet series connection.
7. a kind of electric radiation device for heat-treatment furnace according to claim 1, which is characterized in that the radiation
Pipe (1) is mounted at the top of furnace shell (9), and the wall thickness of radiant tube (1) is up big and down small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115593.2U CN209386819U (en) | 2018-12-17 | 2018-12-17 | A kind of electric radiation device for heat-treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115593.2U CN209386819U (en) | 2018-12-17 | 2018-12-17 | A kind of electric radiation device for heat-treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209386819U true CN209386819U (en) | 2019-09-13 |
Family
ID=67872155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822115593.2U Active CN209386819U (en) | 2018-12-17 | 2018-12-17 | A kind of electric radiation device for heat-treatment furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN209386819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443011A (en) * | 2018-12-17 | 2019-03-08 | 上海颐柏科技股份有限公司 | A kind of electric radiation device for heat-treatment furnace |
-
2018
- 2018-12-17 CN CN201822115593.2U patent/CN209386819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443011A (en) * | 2018-12-17 | 2019-03-08 | 上海颐柏科技股份有限公司 | A kind of electric radiation device for heat-treatment furnace |
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