CN109743800A - A kind of improved hollow tube electric heating radiant tube - Google Patents
A kind of improved hollow tube electric heating radiant tube Download PDFInfo
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- CN109743800A CN109743800A CN201910117715.8A CN201910117715A CN109743800A CN 109743800 A CN109743800 A CN 109743800A CN 201910117715 A CN201910117715 A CN 201910117715A CN 109743800 A CN109743800 A CN 109743800A
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- tube
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- electric heating
- radiant tube
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Abstract
The present invention proposes a kind of improved hollow electric heating radiant tube, it includes the hollow heating pipe tube body being arranged in pairs, the connecting plate that the end of tube body is closed and conducted, the connecting tube being connect with the other end of tube body, the periphery of part connecting tube is provided with soaking zone, and connecting tube and soaking zone joint are equipped with fixed plate；The end of connecting tube is provided with electrode connecting end, connect respectively with the positive and negative electrode of power supply；The junction of tube body and connecting tube is provided with connecting component, and the socket part of connecting component and hollow pipe fitting is arranged with venthole.Electric heating radiant tube of the invention directlys adopt electrothermal alloy and hollow heating pipe is made, and the weight of material only has original 20% or so, significantly reduces material cost, and heating required energy consumption significantly reduces；The accuracy of temperature control of electric heating radiant tube is high, and heating power is high, long service life.
Description
Technical field
The present invention relates to industrial electro technical field of heating, spy is standby to be related to a kind of improved hollow tube electric heating radiant tube.
Background technique
In current industrial electro technical field of heating, for example, Industrial Boiler heating art, typically uses in resistance wire
The electric heating radiant tube of formula is set, the inside pipe casing of radiant tube places one or more resistive heater, and resistance wire utilizes support rib
Frame is fixed on inside pipe casing, and the manufacturing process of this electric heating tube is relatively easy, easy to make, therefore is largely used,
But there is also problems for this electric heating tube:
(1) casing+built-in resistor silk structure is used, causes the material utilization amount of electric heating tube and quality very big, one group of heating tube
Weight at 50-60 kilograms, material cost is relatively high；In addition, due to the big quality weight of the material materials of electric heating tube, needed for heating
The electric energy of consumption is also relatively high；
(2) electric heating tube of this built-in resistor silk structure is first to be generated heat by internal resistance wire, is transmitted to casing, then have set
Heat dissipation in Guan Xianglu, there are temperature gradients between electric heating tube and environment temperature, for example, if required environment temperature is 900
DEG C, the actual temperature of resistance wire in casing at 950-1000 DEG C, resistance wire by high-temperature oxydation influenced bigger, shorten
The service life of resistance wire, that is, the service life of electric heating tube is affected, increase the maintenance cost of client；Moreover, by
Big in material weight, surface loading is big, radiate it is slower, the temperature inside heating radiation pipe is excessively high, easily cause internal expansion into
And cause the rupture of heating radiation pipe；
(3) since there are temperature gradients between internal resistive heater, wall thickness thicker casing and environment temperature, since heat is used
The influence of property, the temperature control region of electric heating tube is bigger, for example, actually required in-furnace temperature is 900 DEG C, and in order to reach
The furnace temperature needed, actual temperature of the resistance wire when gradually heating will reach 950-1000 DEG C, and in-furnace temperature can also gradually rise
To more than 900 DEG C, when in-furnace temperature is excessively high, need to turn down the heating temperature of resistance wire, still, due to thermal inertia, temperature
What reduction always gradually carried out；Conversely, when in-furnace temperature is lower the heating temperature for needing to improve resistance wire；Therefore, furnace
Interior actual temperature be difficult it is more stable maintain about 900 DEG C, the thickness and quality of materials of heating tube are bigger, thermal inertia shadow
Sound is bigger, and accuracy of temperature control is with regard to smaller, and the temperature-control range of the built-in heating radiation pipe of current this resistance wire is bigger, generally
It is ± 30 DEG C；The temperature for being unfavorable for industrial furnace accurately controls.
Therefore, the electrically heated rod of the bushing type generally used in industrial field of electric heating at present, material utilization amount is at high cost greatly,
Energy consumption is high, and the big heat dissipation of surface loading is not easy, and is not consistent with the green industry production theory that country advocates；And accuracy of temperature control is not yet
Be it is very outstanding, be not able to satisfy higher and higher client's use demand.
Summary of the invention
For defect existing for the built-in electric heating radiant tube of resistance wire in the prior art, the object of the present invention is to provide
A kind of improved hollow electric heating radiant tube, can be significantly reduced the dosage of electrothermal alloy, reduces energy consumption and can significantly improve
Accuracy of temperature control.
To achieve the object of the present invention, the hollow tube electric heating radiant tube of a modification of the present invention includes being arranged in pairs
Hollow heating pipe tube body, the connecting plate that the end of tube body is closed and conducted are connect with the other end of tube body
Connecting tube, the periphery of part connecting tube are provided with the soaking zone of thermal insulation material composition, and connecting tube and soaking zone joint are equipped with will
The fixed plate that heating radiation pipe and boiler are fixed；The end of the connecting tube be provided with electrode connecting end, respectively with
The positive and negative electrode of power supply connects；The junction of the hollow heating pipe body and connecting tube is provided with connecting component, connecting component with
The junction of connecting tube and hollow heating pipe body is fully welded welded connecting using circumferential weld；The socket part of connecting component and hollow pipe fitting
It is arranged with venthole, the venthole is located at the lower portion of soaking zone；The engaging portion of the connecting tube and fixed plate is set
There is sealing element.
Preferably, the material of the hollow heating pipe body is nickel base superalloy Cr20Ni80A.
Further preferably, the wall thickness of the hollow heating pipe body is 2.5-3.5mm.
Further preferably, the wall thickness of the hollow heating pipe body is 2.8-3.2mm.
Further preferably, the diameter of the hollow heating pipe body is 60-65mm.
Further preferably, the diameter of the hollow heating pipe body is 62-63.5mm.
Further preferably, the end of the connecting plate and heating hollow tube is fully welded welded connecting using circumferential weld and fixes；And
Bulge-structure is set as in the middle part of connecting plate.
Further preferably, the venthole on the electric heating radiant tube is set as one or more.
Further preferably, the diameter of the venthole is 18-22mm.
Electric heating radiant tube of the invention directlys adopt electrothermal alloy and hollow heating pipe is made, and the weight of material only has original
First 20% or so, significantly reduces material cost, and heating required energy consumption significantly reduces；Electric heating radiant tube is by electrothermal alloy
Manufactured hollow heating pipe body direct-electrifying heating, is not present temperature gradient, accuracy of temperature control between electric heating tube and environment temperature
It is high；In addition, reducing the high-temperature oxydation effect of electrothermal alloy hollow heating pipe body, extend the service life of electric heating radiant tube,
Thin-walled tube body directly heats, and surface loading is low, rapid heat dissipation, and heating power is high.
Detailed description of the invention
Through the following detailed description taken in conjunction with the accompanying drawings, present invention objects, features and advantages above-mentioned and other will become
Obviously.Wherein:
Fig. 1 show the schematic perspective view of the improved hollow tube electric heating radiant tube of one embodiment of the invention；
Fig. 2 shows the schematic diagram of internal structure of the improved hollow tube electric heating radiant tube of Fig. 1；
Fig. 3 show the schematic view of the front view of the improved hollow tube electric heating radiant tube of Fig. 1.
Specific embodiment
Together referring to figs. 1 to the structural schematic diagram of improved hollow tube electric heating radiant tube of the invention shown in Fig. 3, institute
The electric heating radiant tube stated includes the hollow heating pipe tube body 10 being arranged in pairs, and the end of tube body 10 is closed and carries out electricity
The connecting plate 12 of conducting, the connecting tube 14(electrode fairlead being connect with the other end of tube body 10), the periphery of part connecting tube 14
It is provided with the soaking zone 20 of thermal insulation material composition, connecting tube 14 is equipped with 20 joint of soaking zone consolidates heating radiation pipe with boiler
Fixed fixed plate 22；The end of the connecting tube 14 is provided with electrode connecting end 16, respectively with the positive and negative electrode of power supply
Connection；The junction of the hollow heating pipe body 10 and connecting tube 14 is provided with connecting component 24, connecting component 24 with connect
The junction of pipe 14 and hollow heating pipe body 10 is fully welded welded connecting using circumferential weld；The set of connecting component 24 and hollow pipe fitting 10
Socket part is arranged with venthole 102, and the venthole 102 is located at the lower portion of soaking zone 20, the i.e. venthole 102 not
It is the inside that soaking zone is set；The engaging portion of the connecting tube 14 and fixed plate 22 is equipped with sealing element 18, the sealing
The preferred Ceramics sealing element of part 18；The connecting plate 12 is by the end part seal of two hollow tubes 10 and by two tube bodies
10 are conducted.
In a preferred embodiment, the material of the hollow heating pipe body 10 is nickel base superalloy
Cr20Ni80A；In another preferred embodiment, the wall thickness of the hollow heating pipe body 10 is 2.5-3.5mm.The present invention
Hollow heating pipe body 10 be directly to pass through tube-making process pipe crimping using high-temperature electric heat alloy and form, then pass through Plasma Welding shape
At the tube body of sealing, when wall thickness is thicker, tubulation is relatively difficult, it is not easy to the cast of formation rule, moreover, when wall thickness is excessive,
Material cost and energy consumption will increase；The too thin intensity that will affect heating radiation pipe of wall thickness, easily deforms, the present invention is passing through
It crosses on the basis of actual tests, the wall thickness for heating tube body is limited in 2.5-3.5mm, can both guarantee the demand of heating, simultaneously
Ratio of briquetting, material cost and the energy consumption of pipe fitting processing are taken into account.In a more preferred embodiment, the wall of tube body is heated
Thickness is limited in 2.8-3.2mm；In addition, the tube-making process and heating power of high-temperature electric heat alloy sheets are taken into account, the hollow heating
The diameter design of tube body is 60-65mm, and in a more preferred embodiment, the wall thickness for heating tube body is limited in 62-
63.5mm。
In a preferred embodiment, the end of the connecting plate 12 and heating hollow tube 10 is fully welded using circumferential weld
It is welded to connect and fixes；The middle part of connecting plate 12 is set as bulge-structure, two tube bodies can be separated and guarantee the strong of connecting plate
Degree.
In another preferred embodiment, the venthole 102 on the electric heating radiant tube can be set to one
Or it is multiple, when electric heating radiant tube electrified regulation, internal air heats expansion can be discharged by venthole,
Avoid the pressure inside electric heating radiant tube is excessive from causing radiant tube impaired；The diameter of the venthole 102 is 18-22mm.
Electric heating radiant tube of the invention directlys adopt electrothermal alloy and hollow heating pipe is made, and the wall thickness of pipe fitting is on the left side 3mm
The right side, compared to original using casing+built-in resistor silk structure, the weight of material only has original 20% or so, significantly reduces
Material cost, the materials'use amount being greatly decreased also bring the significant decrease of energy consumption needed for heating；Electric heating radiant tube is by electricity
Hollow heating pipe body direct-electrifying made of thermalloy heating, the temperature of tube body and practical furnace temperature it is essentially the same, electric heating tube with
Temperature gradient is not present between environment temperature, compared with the built-in electric heating radiant tube of existing resistance wire, being not necessarily to will be hollow
Heating tube body is heated to a relatively high temperature to realize required furnace temperature, hollow heating pipe by high-temperature oxydation influenced ratio
It is smaller, the service life of heating radiation pipe is extended, the maintenance cost of client is reduced；Moreover, because electric heating tube and environment
Apparent temperature gradient is not present between temperature (furnace temperature), the temperature and heating precision for controlling electric heating tube also ensure that furnace
The control precision of temperature, accuracy of temperature control is relatively high, can achieve ± 5 DEG C；Compared to original built-in Resistant heating form, change
Radiant tube after is directly heated using the bigger tube body of heating surface (area) (HS, and the power of heating significantly improves, the heating temperature of radiant tube
Degree can achieve 950 DEG C；The surface loading of thin-walled tube body significantly reduces (in 1.8W/cm2Left and right), rapid heat dissipation reduces electric heating
The high-temperature oxydation effect of alloy hollow heating pipe body.
The present invention is not limited to the described embodiments, and those skilled in the art is not departing from spirit of the invention i.e. public affairs
Open in range, still may make some modifications or changes, thus the range that is limited with claims of the scope of the present invention as
It is quasi-.
Claims (9)
1. a kind of improved hollow tube electric heating radiant tube, which is characterized in that the electric heating radiant tube includes being arranged in pairs
Hollow heating pipe tube body, the connecting plate that the end of tube body is closed and conducted connect with the other end of tube body
Connecting tube, the periphery of part connecting tube is provided with the soaking zone of thermal insulation material composition, and connecting tube is equipped with soaking zone joint
By the fixed plate that heating radiation pipe and boiler are fixed；The end of the connecting tube is provided with electrode connecting end, respectively
It is connect with the positive and negative electrode of power supply；The junction of the hollow heating pipe body and connecting tube is provided with connecting component, connecting component
Welded connecting is fully welded using circumferential weld with the junction of connecting tube and hollow heating pipe body；The socket of connecting component and hollow pipe fitting
Part is equipped with venthole, and the venthole is located at the lower portion of soaking zone；The engaging portion of the connecting tube and fixed plate
Equipped with sealing element.
2. a kind of improved hollow tube electric heating radiant tube as described in claim 1, which is characterized in that the hollow heating
The material of tube body is nickel base superalloy Cr20Ni80A.
3. a kind of improved hollow tube electric heating radiant tube as claimed in claim 1 or 2, which is characterized in that described is hollow
The wall thickness for heating tube body is 2.5-3.5mm.
4. a kind of improved hollow tube electric heating radiant tube as claimed in claim 3, which is characterized in that the hollow heating
The wall thickness of tube body is 2.8-3.2mm.
5. a kind of improved hollow tube electric heating radiant tube as claimed in claim 3, which is characterized in that the hollow heating
The diameter of tube body is 60-65mm.
6. a kind of improved hollow tube electric heating radiant tube as claimed in claim 5, which is characterized in that the hollow heating
The diameter of tube body is 62-63.5mm.
7. a kind of improved hollow tube electric heating radiant tube as described in claim 1, which is characterized in that the connecting plate with
The end of heating hollow tube is fully welded welded connecting using circumferential weld and fixes；And bulge-structure is set as in the middle part of connecting plate.
8. a kind of improved hollow tube electric heating radiant tube as described in claim 1, which is characterized in that the electric heating spoke
The venthole penetrated on pipe is set as one or more.
9. a kind of improved hollow tube electric heating radiant tube as claimed in claim 8, which is characterized in that the venthole
Diameter is 18-22mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910117715.8A CN109743800A (en) | 2019-02-15 | 2019-02-15 | A kind of improved hollow tube electric heating radiant tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910117715.8A CN109743800A (en) | 2019-02-15 | 2019-02-15 | A kind of improved hollow tube electric heating radiant tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109743800A true CN109743800A (en) | 2019-05-10 |
Family
ID=66367569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910117715.8A Pending CN109743800A (en) | 2019-02-15 | 2019-02-15 | A kind of improved hollow tube electric heating radiant tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109743800A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537192Y (en) * | 2002-02-19 | 2003-02-19 | 苗永东 | Electric heater for thermos bottle heating and vacuuming |
| CN101686583A (en) * | 2009-07-17 | 2010-03-31 | 苏州工业园区姑苏科技有限公司 | Coreless electric-heating radiant tube heating device |
| CN102769942A (en) * | 2011-05-05 | 2012-11-07 | 江苏金达电热电器有限公司 | Radiant tube for industrial furnace |
| CN206743575U (en) * | 2017-04-01 | 2017-12-12 | 上海韵申新能源科技有限公司 | A kind of high-performance electric heating tube |
-
2019
- 2019-02-15 CN CN201910117715.8A patent/CN109743800A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537192Y (en) * | 2002-02-19 | 2003-02-19 | 苗永东 | Electric heater for thermos bottle heating and vacuuming |
| CN101686583A (en) * | 2009-07-17 | 2010-03-31 | 苏州工业园区姑苏科技有限公司 | Coreless electric-heating radiant tube heating device |
| CN102769942A (en) * | 2011-05-05 | 2012-11-07 | 江苏金达电热电器有限公司 | Radiant tube for industrial furnace |
| CN206743575U (en) * | 2017-04-01 | 2017-12-12 | 上海韵申新能源科技有限公司 | A kind of high-performance electric heating tube |
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