CN107809812A - A kind of radiant tube used for industrial furnace - Google Patents
A kind of radiant tube used for industrial furnace Download PDFInfo
- Publication number
- CN107809812A CN107809812A CN201711088022.8A CN201711088022A CN107809812A CN 107809812 A CN107809812 A CN 107809812A CN 201711088022 A CN201711088022 A CN 201711088022A CN 107809812 A CN107809812 A CN 107809812A
- Authority
- CN
- China
- Prior art keywords
- radiant tube
- resistance wire
- tube shell
- heat resisting
- pipe
- 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
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
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- Combustion Of Fluid Fuel (AREA)
Abstract
The invention discloses a kind of radiant tube used for industrial furnace, including radiant tube shell and heater, described radiant tube shell is straight pipe type, described radiant tube shell one end is provided with flange, described heater is made up of heat resisting pipe, some ceramic spacer rings and resistance wire, some ceramic spacer rings are axially uniformly arranged along radiant tube shell, heat resisting pipe is interspersed to be wound on ceramic spacer ring, described resistance wire is arranged in heat resisting pipe and filled by dielectric, and described resistance wire is provided at both ends with binding post.The radiant tube used for industrial furnace is simple in construction, is easily installed, and production cost is low, service life length.
Description
Technical field：
The present invention relates to a kind of radiant tube of industrial furnace electrical heating.
Background technology：
Radiant tube is a kind of heater commonly used in the industries such as metallurgy, medicine, tobacco, weaving, food, in the prior art, spoke
Penetrate pipe and heating is largely realized using electric energy or high-quality gaseous fuel.Existing electrical heating radiant tube used for industrial furnace, the temperature difference become
Change greatly, radiant tube is easy to damage.And lack the production capacity of production high energy efficiency radiant tube now.Radiant tube is mainly adopted at present
Straight tube and hot investment casting are manufactured to manufacture bend pipe with centrifugal casting, and the straight tube wall thickness minimum of centrifugal casting manufacture will reach 8mm
More than, the bend pipe wall thickness minimum of hot investment casting manufacture will reach more than 10mm.Such radiant tube weight weight, cost are high, heat energy
Utilization rate is low, energy expenditure is high and elongation percentage is low, and flexural deformation and cracking are easily produced under the condition of high temperature.
Chinese patent CN200910249501.2 discloses a kind of double-P type radiant tube and its manufacture method, double-P type radiant tube, dress
In heat-treatment furnace, including three straight tubes arranged in parallel, the both ends of the straight tube have been symmetrically welded two bend pipes, wherein one
Air inlet pipe is provided among root bend pipe, the air inlet pipe and the straight tube of centre are coaxially disposed, and the one of support tube is welded on another bend pipe
End, the support tube and middle straight tube are coaxial.The manufacture method of double-P type radiant tube, it is characterised in that comprise the following steps： (1)
Shear, is rolled and is welded straight tube, air inlet pipe is made；(2) plate stamping is shaped to the shape of bend pipe half, and the shape of bend pipe half is welded
Form bend pipe；(3) by the straight tube manufactured and bend pipe argon arc welding, and support tube, air inlet pipe are welded.Double-P type radiant tube and double
The manufacture method of p-type radiant tube, the advantageous effects reached are：1. double-P type radiant tube straight tube and bend pipe all use
3mm steel plates make, and overall weight is approximately the 1/3 of the W type radiant tube weight of prior art manufacture, mitigate the load-bearing of stove, phase
The design weight of corresponding stove can mitigate about 2/3 than the design weight of existing stove, can save about 2/3 construction cost.
2. double-P type radiant tube straight tube and bend pipe are all made using 3mm steel plates, wall thickness only has the W type radiant tubes that prior art manufactures
The 1/3 of wall thickness, heat transfer effect improve about 2/3 than existing radiant tube, can be with saving heat energy about 2/3.3. double-P type radiant tube straight tube and
Bend pipe is all made using steel plate, and yield strength, tensile strength and the elongation percentage of INCONEL601 steel plates are better than prior art,
So under the long-time condition of high temperature INCONEL601 steel plates make double-P type radiant tube will not bend fracture, and the W of centrifugal casting
Type radiant tube is easily bent fracture in the long-time condition of high temperature, and INCONEL601 steel plates, which make double-P type radiant tube service life, is
2 times of the radiant tube that centrifugal casting makes.4. the heating system of the W type radiant tubes of prior art manufacture is to be heated from one to another
One heat transfer, difference variation is big, and radiant tube is easily damaged；The heating system of double-P type radiant tube is to heat to both sides to pass from centre
Heat, difference variation is small, and radiant tube is less likely to be damaged, service life length, is 2 times of the radiant tube that centrifugal casting makes.But the spoke
It is complicated to penetrate pipe heating device, installation and maintenance inconvenience, increases production cost.The hair of last decade is crossed in China's radiant tube manufacture already
Exhibition, has been achieved compared with good result, as science and technology is constantly brought forth new ideas, requirement to radiant tube also more and more higher, it is desirable to high energy efficiency
Direction is developed, and to increase substantially the utilization rate of heat energy, but does not keep up with industrial technology completely on breed structure readjustment and enters
Step, the paces of structure optimization adjustment.
The content of the invention：
In order to solve the defects of prior art is present, the invention provides a kind of simple in construction, spoke used for industrial furnace for being easily installed
Pipe is penetrated, effectively reduces production cost.
The technical solution adopted by the present invention is：
A kind of radiant tube used for industrial furnace, including radiant tube shell and heater, described radiant tube shell is straight pipe type, described
Radiant tube shell one end is provided with flange, and described heater is made up of heat resisting pipe, some ceramic spacer rings and resistance wire, some
Ceramic spacer ring is axially uniformly arranged along radiant tube shell, and heat resisting pipe is interspersed to be wound on ceramic spacer ring, and described resistance wire is set
Put in heat resisting pipe and filled by dielectric, described resistance wire is provided at both ends with binding post.
The length of described resistance wire and the length of heat resisting pipe should be ensured that its head is stretched out outside radiant tube shell.
A resistance wire of the invention is arranged in a heat resisting pipe, and fills the vacant portion of heat resisting pipe by dielectric
Point, resistance wire is provided at both ends with binding post, and heat resisting pipe is interspersed to be wound on ceramic spacer ring, is easily installed, is reduced system
Cause this.
Beneficial effects of the present invention：It is simple in construction, be easily installed, production cost is low, service life length.
Brief description of the drawings
Fig. 1 is structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation that the embodiment of the present invention removes radiant tube shell；
Fig. 3 is heat resisting pipe enlarged section of the embodiment of the present invention.
Sequence number in figure：1st, radiant tube shell, 2, flange, 3, heat resisting pipe, 4, ceramic spacer ring, 5, resistance wire, 6,
Dielectric, 7, binding post.
Embodiment
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings：It is a kind of used for industrial furnace referring to Fig. 1, Fig. 2 and Fig. 3
Radiant tube, including radiant tube shell 1 and heater, described radiant tube shell 1 are straight pipe type, described radiant tube shell 1 one
End is provided with flange 2, and described heater is made up of heat resisting pipe 3,14 ceramic spacer rings 4 and resistance wire 5,11 ceramics
Spacer ring 4 is axially uniformly arranged along radiant tube shell 1, and heat resisting pipe 3 is interspersed to be wound on ceramic spacer ring 4, and described resistance wire 5 is set
Put in heat resisting pipe 3 and filled by dielectric 6, the length of described resistance wire 5 and the length of heat resisting pipe 3 should be ensured that
Its head is stretched out outside radiant tube shell 1, and described resistance wire 5 is provided at both ends with binding post 7.
Embodiment does not form the limit to the scope of the present invention only to facilitate understand technical scheme
System, it is every without departing from any letter perhaps made in technical solution of the present invention according to the technical spirit of the present invention to above scheme
Single modification, equivalent variations and modification, still fall within the scope of the present invention.
Claims (2)
- (1) and (1) heater, described radiant tube shell are straight pipe type 1. a kind of radiant tube used for industrial furnace, including radiant tube shell, (1) (2) one end is provided with flange to described radiant tube shell, it is characterised in that：Described heater by heat resisting pipe (3), Ruo Gantao Porcelain spacer ring is (4) and (5) resistance wire forms, and (4) (1) some ceramic spacer rings are axially uniformly arranged along radiant tube shell, (3) heat resisting pipe is worn Insert be wound on ceramic spacer ring (4) on, (6) filled (5) (3) described resistance wire is arranged on heat resisting pipe in and by dielectric, it is described Resistance wire (5) be provided at both ends with binding post (7).
- 2. according to a kind of radiant tube used for industrial furnace described in claim 1, it is characterised in that：Described resistance wire length (5) and resistance to It is (1) outer that the length of hot steel pipe (3) should be ensured that radiant tube shell is stretched out on its head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711088022.8A CN107809812A (en) | 2017-11-08 | 2017-11-08 | A kind of radiant tube used for industrial furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711088022.8A CN107809812A (en) | 2017-11-08 | 2017-11-08 | A kind of radiant tube used for industrial furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107809812A true CN107809812A (en) | 2018-03-16 |
Family
ID=61591815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711088022.8A Pending CN107809812A (en) | 2017-11-08 | 2017-11-08 | A kind of radiant tube used for industrial furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107809812A (en) |
-
2017
- 2017-11-08 CN CN201711088022.8A patent/CN107809812A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180316 |