CN103697476B - A kind of flat double-P type radiant tube - Google Patents
A kind of flat double-P type radiant tube Download PDFInfo
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- CN103697476B CN103697476B CN201310714351.4A CN201310714351A CN103697476B CN 103697476 B CN103697476 B CN 103697476B CN 201310714351 A CN201310714351 A CN 201310714351A CN 103697476 B CN103697476 B CN 103697476B
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- jet pipe
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- lateral jet
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Abstract
A kind of flat double-P type radiant tube of the present invention, comprise the first straight tube, three-way pipe, the second straight tube, the 3rd straight tube, the first bend pipe and the second bend pipe, burner is fixed in described first straight tube pipe laying, core jet pipe is combustion gas spout, four jet pipes in outside are air port, nozzle section is oval entirely, and oval long limit is identical with minor face ratio with long limit, described radiant tube body cross section with minor face ratio.Described first straight tube, three-way pipe carry out thickening process.Advantage of the present invention is: the tube wall that the first straight tube of thickening can effectively prevent high temperature corrosion from causing lost efficacy, the Tube Bending Deformation that the three-way pipe of thickening can prevent thermal stress from causing; Radiant tube body cross section is ellipticity, and contrast expends the tubular radiant tube of same alloy steel, adds the effective radiating area of radiant tube to workpiece, improves the heat exchange amount in the unit interval between radiant tube and workpiece; Burned flame, to the diffusion of radiant tube both sides, adds radiant tube two side walls radiation temperature and radiant tube uniformity of temperature profile.
Description
Technical field
The present invention relates to a kind of gas-fired radiation pipe heating device, the tubular form of radiant tube and nozzle structure are improved, the flat double-P type radiant tube of the heating furnace of heat-treating under being mainly used in protective atmosphere.
Background technology
Metal heat treatmet can make to be had good performance by heating of metal, and its heating process is carried out mostly under protective atmosphere, effectively prevents from, by heating element heater, overheated, burning, decarburization and oxidation are occurred in stove.Current modal heat treatment mode of heating is electrical heating and gas heating, and compared with electrical heating, gas fired radiant tubes heating has the advantages such as per surface area thermal power is large, the thermal efficiency is high, operating cost is low.
Radiant tube wall directly affects the overall energy consumption of heating furnace and the firing rate of workpiece to the Radiant exothermicity of workpiece.
The gas fired radiant tubes of current use is all tubular, and just to less by the effective area of heating element heater, and between workpiece, heat exchange amount is relatively little, reduces the firing rate of workpiece.
The breaking of radiant tube is mainly caused by creep and high-temperature oxydation, and generally occur in the region from burner 65-90cm, the carburizing of tube wall causes the ductility of material sharply to decline; In pipe bent position, because axial stress and radial stress are comparatively large, cause Tube Bending Deformation.The service life impact of above-mentioned two situations on radiant tube is very large.
For gas-fired radiation pipe heating device, the surface temperature uniformity of radiant tube burning weighs the important indicator of radiant tube performance, traditional radiant tube structure (U-shaped and W type) does not use flue gas recirculation return-flow structure, therefore flame kernel temperature is higher, radiant tube surface temperature difference is larger, flat double-P type radiant tube has smoke backflow structure, greatly reduces the central temperature of flame, and surface temperature uniformity is improved.
Summary of the invention
The object of the invention is by the body Cross section Design ovalisation by radiant tube, increase the effective radiating area between the body of radiant tube and workpiece, thus increase the heat exchange amount of radiant tube body and workpiece in the unit interval, improve the radiant tube efficiency of heating surface.
The flat double-P type radiant tube of one proposed by the invention, this radiant tube comprises: radiant tube body portion and burner;
Wherein, described radiant tube body portion comprises the first straight tube, three-way pipe, the second straight tube, the 3rd straight tube, the first bend pipe and the second bend pipe;
Wherein, the first straight tube, the second straight tube and the 3rd straight tube are arranged in parallel, and the first straight tube is air inlet pipe; One end of the first described straight tube, the second straight tube and the 3rd straight tube is by described three-way pipe UNICOM, the other end of described second straight tube is connected with the other end of described first straight tube by described first bend pipe, and the other end of described 3rd straight tube is connected with the other end of described first straight tube by the second bend pipe;
Described burner is fixed on the mouth of pipe place of described first straight tube by flange, described burner is made up of a core jet pipe and the first lateral jet pipe, the second lateral jet pipe the 3rd lateral jet pipe the 4th lateral jet pipe, described core jet pipe is combustion gas sprinkling irrigation, and the first lateral jet pipe equidistantly arranged around described core jet pipe surrounding, the second lateral jet pipe the 3rd lateral jet pipe the 4th lateral jet pipe are air lance.
Further, described first straight tube, three-way pipe, the second straight tube, the 3rd straight tube, the first bend pipe, the second bend pipe body cross section are ellipticity, and the ratio of oval long limit and minor face is between 1:1 ~ 1.5:1.
Further, the cross section of described core jet pipe and the first lateral jet pipe, the second lateral jet pipe, the 3rd lateral jet pipe and the 4th lateral jet pipe is ellipse, between its long limit and ratio 1:1 ~ 1.5:1 of minor face.
Further, the sectional area of the body of described first lateral jet pipe and the 3rd lateral jet pipe is less than the sectional area of the body of described second lateral jet pipe and the 4th lateral jet pipe, and the ratio of the sectional area of the sectional area of the body of described first lateral jet pipe and the 3rd lateral jet pipe and the body of described second lateral jet pipe and the 4th lateral jet pipe is between 1:1.5 ~ 2.5.
Further, described first lateral jet pipe and the 3rd lateral jet pipe are symmetrical arranged, and the second lateral jet pipe and the 4th lateral jet pipe are symmetrical arranged; Distance between first lateral jet pipe and the 3rd lateral jet pipe and the ratio of distances constant between the second lateral jet pipe and the 4th lateral jet pipe are between 1:1 ~ 1.5:1.
Further, the cross section minor face of described core jet pipe is Dc, and the distance between the end of described burner and described first bend pipe longitudinal centre line is d, and wherein d numerical value is between 0 ~ Dc.Further, described radiant tube first straight tube and three-way pipe are than the thickness of pipe wall 2mm of the second straight tube, the 3rd straight tube, the first bend pipe and the second bend pipe.
Advantage of the present invention is:
1, adopt flat radiant tube, the effective radiating area of its radiant tube is larger than the tubular type radiant tube expending same material, and in the unit interval, Radiant exothermicity is large.
2, the first straight tube and three-way pipe wall thicken by the present invention, effectively can prevent the first straight tube and the partial failure of three-way pipe place, increase the service life of radiant tube.
3, radiant tube Cross section Design is become flat by the present invention, and relative pipe decreases combustion space, and the wall surface temperature of radiant tube can improve, and enhances the heat exchange amount of radiant tube and workpiece.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flat double-P type radiant tube of the present invention.
Fig. 2 be in Fig. 1 A-A to cross-sectional view.
Fig. 3 is Fig. 1 the present invention flat double-P type radiant tube heater burner profile.
In figure: 1, the first straight tube, 2, three-way pipe, the 3, second straight tube, the 4, the 3rd straight tube, the 5, first bend pipe, the 6, second bend pipe, 7, burner, 7-1, core jet pipe, 7-2, the first lateral jet pipe, 7-3 second lateral jet pipe, 7-4 the 3rd lateral jet pipe, 7-5, the 4th lateral jet pipe.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
If Fig. 1-3 is a kind of flat double-P type radiant tube of the present invention, described radiation pipe apparatus comprises: radiant tube body portion and burner;
Wherein, described radiant tube body portion comprises the first straight tube 1, three-way pipe 2, second straight tube 3, the 3rd straight tube 4, first bend pipe 5 and the second bend pipe 6;
Wherein, the first straight tube 1, second straight tube 3 and the 3rd straight tube 4 arranged in parallel, the first straight tube 1 is air inlet pipe; The first described straight tube 1, second straight tube 3 and one end of the 3rd straight tube 4 are by described three-way pipe 2 UNICOM, the other end of described second straight tube 3 is connected with the other end of described first straight tube 1 by described first bend pipe 5, and the other end of described 3rd straight tube 4 is connected with the other end of described first straight tube 1 by the second bend pipe 6;
Described burner 7 is fixed on the mouth of pipe place of described first straight tube 1 by flange, described burner 7 is made up of a core jet pipe 7-1 and the first lateral jet pipe 7-2, the second lateral jet pipe 7-3 the 3rd lateral jet pipe 7-4 the 4th lateral jet pipe 7-5, described core jet pipe 7-1 is exhaust gas nozzle, and the first lateral jet pipe 7-2, the second lateral jet pipe 7-3, the 3rd lateral jet pipe 7-4 and the 4th lateral jet pipe 7-5 that are looped around the setting of described core jet pipe 7-1 surrounding are air lance.
Described first straight tube 1, three-way pipe 2, second straight tube 3, the 3rd straight tube 4, first bend pipe 1, second bend pipe 2 body cross section are ellipticity, and the ratio of oval long limit and minor face is between 1:1 ~ 1.5:1.
The cross section of described core jet pipe 7-1 and the first lateral jet pipe 7-2, the second lateral jet pipe 7-3, the 3rd lateral jet pipe 7-4 and the 4th lateral jet pipe 7-5 is ellipse, between its long limit and ratio 1:1 ~ 1.5:1 of minor face.
The sectional area of the body of described first lateral jet pipe 7-2 and the 3rd lateral jet pipe 7-4 is less than the sectional area of the body of described second lateral jet pipe 7-3 and the 4th lateral jet pipe 7-5, and the ratio of the sectional area of the sectional area of the body of described first lateral jet pipe 7-2 and the 3rd lateral jet pipe 7-4 and the body of described second lateral jet pipe 7-3 and the 4th lateral jet pipe 7-5 is between 1:1.5 ~ 2.5.Described first lateral jet pipe 7-2 and the 3rd lateral jet pipe 7-4 is symmetrical arranged, and the second lateral jet pipe 7-3 and the 4th lateral jet pipe 7-5 is symmetrical arranged;
Distance between first lateral jet pipe 7-2 and the 3rd lateral jet pipe 7-4 and the ratio of distances constant between the second lateral jet pipe 7-3 and the 4th lateral jet pipe 7-5 are between 1:1 ~ 1.5:1.
The cross section minor face of described core jet pipe 7-1 is Dc, and the distance between the end of described burner 7 and described first bend pipe 5 longitudinal centre line is d, and wherein d numerical value is between 0 ~ Dc.
The tube wall of described radiant tube first straight tube 1 and three-way pipe 2 is than the thickness of pipe wall at least 2mm of the second straight tube 3, the 3rd straight tube 4, first bend pipe 5 and the second bend pipe 6.
Fig. 2 is that the A of the flat double-P type radiant tube Fig. 1 of the present invention is to side view.Described radiant tube body cross sectional shape is oval, and two side walls corresponding to long limit is just to workpiece, and outside radiations heat energy, adds the effective radiating area of radiant tube to workpiece, adds the heat exchange amount of radiant tube and workpiece within the unit interval.
The diagram that above-mentioned flat double-P type radiant tube just carries out a kind of flat body example and description; but flat body of the present invention is not by the restriction of above-mentioned example; as long as use wherein a kind of substantially identical means to reach technique effect of the present invention, all protection scope of the present invention should be belonged to.
Claims (4)
1. a flat double-P type radiant tube, is characterized in that, described radiant tube comprises: radiant tube body portion and burner (7);
Wherein, described radiant tube body portion comprises the first straight tube (1), three-way pipe (2), the second straight tube (3), the 3rd straight tube (4), the first bend pipe (5) and the second bend pipe (6);
Wherein, the first straight tube (1), the second straight tube (3) and the 3rd straight tube (4) are arranged in parallel, and the first straight tube (1) is air inlet pipe, one end of described the first straight tube (1), the second straight tube (3) and the 3rd straight tube (4) is by described three-way pipe (2) UNICOM, the other end of described second straight tube (3) is connected with the other end of described first straight tube (1) by described first bend pipe (5), and the other end of described 3rd straight tube (4) is connected with the other end of described first straight tube (1) by the second bend pipe (6), described burner (7) is fixed on the mouth of pipe place of described first straight tube (1) by flange, described burner (7) is made up of a core jet pipe (7-1) and the first lateral jet pipe (7-2), the second lateral jet pipe (7-3), the 3rd lateral jet pipe (7-4), the 4th lateral jet pipe (7-5), described core jet pipe (7-1) is exhaust gas nozzle, and being looped around first lateral jet pipe (7-2) of the surrounding of described core jet pipe (7-1), the second lateral jet pipe (7-3), the 3rd lateral jet pipe (7-4) and the 4th lateral jet pipe (7-5) is air lance, the body cross section of described first straight tube (1), three-way pipe (2), the second straight tube (3), the 3rd straight tube (4), the first bend pipe (1), the second bend pipe (2) is oval, and the ratio of oval long limit and minor face is between 1:1 ~ 1.5:1, described core jet pipe (7-1), first lateral jet pipe (7-2), second lateral jet pipe (7-3), the body cross section of the 3rd lateral jet pipe (7-4) and the 4th lateral jet pipe (7-5) is ellipse, between its long limit and ratio 1:1 ~ 1.5:1 of minor face, the sectional area of the body of described first lateral jet pipe (7-2) and the 3rd lateral jet pipe (7-4) is less than the sectional area of the body of described second lateral jet pipe (7-3) and the 4th lateral jet pipe (7-5), and the ratio of the sectional area of the body of the sectional area of the body of described first lateral jet pipe (7-2) and the 3rd lateral jet pipe (7-4) and described second lateral jet pipe (7-3) and the 4th lateral jet pipe (7-5) is 1:(1.5 ~ 2.5) between.
2. flat double-P type radiant tube as claimed in claim 1, described first lateral jet pipe (7-2) and the 3rd lateral jet pipe (7-4) are symmetrical arranged, and the second lateral jet pipe (7-3) and the 4th lateral jet pipe (7-5) are symmetrical arranged; Distance between first lateral jet pipe (7-2) and the 3rd lateral jet pipe (7-4) and the ratio of distances constant between the second lateral jet pipe (7-3) and the 4th lateral jet pipe (7-5) are between 1:1 ~ 1.5:1.
3. flat double-P type radiant tube as claimed in claim 1, it is characterized in that, the cross section minor face of described core jet pipe (7-1) is Dc, and the distance between the end of described burner (7) and described first bend pipe (5) longitudinal centre line is d, and wherein d numerical value is between 0 ~ Dc.
4. flat double-P type radiant tube as claimed in claim 1, is characterized in that: described radiant tube first straight tube (1) and three-way pipe (2) tube wall are than the thickness of pipe wall at least 2mm of the second straight tube (3), the 3rd straight tube (4), the first bend pipe (5) and the second bend pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714351.4A CN103697476B (en) | 2013-12-22 | 2013-12-22 | A kind of flat double-P type radiant tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714351.4A CN103697476B (en) | 2013-12-22 | 2013-12-22 | A kind of flat double-P type radiant tube |
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| Publication Number | Publication Date |
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| CN103697476A CN103697476A (en) | 2014-04-02 |
| CN103697476B true CN103697476B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310714351.4A Active CN103697476B (en) | 2013-12-22 | 2013-12-22 | A kind of flat double-P type radiant tube |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594728A (en) * | 2016-12-16 | 2017-04-26 | 北京神雾环境能源科技集团股份有限公司 | S-shaped fuel gas radiation pipe |
| CN107965768A (en) * | 2017-11-20 | 2018-04-27 | 马中亮 | A kind of reinforced I types radiant tube outer tube |
| CN110145740A (en) * | 2019-05-23 | 2019-08-20 | 河南天利热工装备股份有限公司 | A kind of novel p-type gas fired radiant tubes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285533A (en) * | 1992-04-13 | 1993-11-02 | Kubota Corp | Manufacture of straight pipe part of radiant tube |
| CN101782233A (en) * | 2008-11-07 | 2010-07-21 | Ws-热处理技术有限责任公司 | regenerator burner |
| CN102252328A (en) * | 2011-07-06 | 2011-11-23 | 重庆赛迪工业炉有限公司 | Radiation tube heater |
| WO2012110852A1 (en) * | 2011-02-14 | 2012-08-23 | Bisson Massimiliano | Radiant tubolar element for industrial plants and similar |
-
2013
- 2013-12-22 CN CN201310714351.4A patent/CN103697476B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285533A (en) * | 1992-04-13 | 1993-11-02 | Kubota Corp | Manufacture of straight pipe part of radiant tube |
| CN101782233A (en) * | 2008-11-07 | 2010-07-21 | Ws-热处理技术有限责任公司 | regenerator burner |
| WO2012110852A1 (en) * | 2011-02-14 | 2012-08-23 | Bisson Massimiliano | Radiant tubolar element for industrial plants and similar |
| CN102252328A (en) * | 2011-07-06 | 2011-11-23 | 重庆赛迪工业炉有限公司 | Radiation tube heater |
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| CN103697476A (en) | 2014-04-02 |
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