CN206042393U - Adopt electric heating element of boron nitride as insulating material - Google Patents
Adopt electric heating element of boron nitride as insulating material Download PDFInfo
- Publication number
- CN206042393U CN206042393U CN201621037920.1U CN201621037920U CN206042393U CN 206042393 U CN206042393 U CN 206042393U CN 201621037920 U CN201621037920 U CN 201621037920U CN 206042393 U CN206042393 U CN 206042393U
- Authority
- CN
- China
- Prior art keywords
- boron nitride
- cold
- electrothermal tube
- outer tube
- tube outer
- 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.)
- Expired - Fee Related
Links
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 32
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000005485 electric heating Methods 0.000 title abstract 3
- 239000011810 insulating material Substances 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract 3
- 239000012530 fluid Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 4
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- Resistance Heating (AREA)
Abstract
The utility model relates to an adopt electric heating element of boron nitride as insulating material, including the electrothermal tube outer tube, characterized by: the boron nitride powder is all filled including district and the cold junction of generating heat at generate heat district and cold junction to the inner chamber of electrothermal tube outer tube, it sets up the heating wire in the boron nitride powder in district to generate heat, sets up cold needle in the boron nitride powder of cold junction, the surface of electrothermal tube outer tube sets up the helical shape cooling surface. The one end of cold needle is connected with the heating wire, and the other end of cold needle is stretched out by the tip of cold junction. The cooling surface arch is in the surface of electrothermal tube outer tube, the transversal arc surface of personally submitting. Top distance of tube -surface outside the electrothermal tube of cooling surface is 1~2mm. The utility model discloses high pressure heater thermal element power density, application temperature, insulation level and dielectric strength can be carried greatly, electric heating element's heat exchange efficiency has been improved simultaneously.
Description
Technical field
This utility model is related to a kind of electrical heating elements, especially a kind of electrical heating of employing boron nitride as insulant
Element.
Background technology
In prior art, electrical heating elements are using magnesium oxide as insulant, the maximum operation (service) temperature of magnesia powder
About 1000 DEG C, at this temperature, its insulating properties drastically declines, and limits maximum operation (service) temperature and the inside of electrical heating elements
The power of resistance.Up to 2000 DEG C of the maximum operation (service) temperature of boron nitride, heat conductivity is high, its insulating properties, temperature resistant grade, leads
Hot coefficient far better than magnesium oxide, using boron nitride as insulant after, heater element power density can be greatly improved, made
With temperature, the class of insulation and dielectric strength.
The surface of existing electrical heating elements is all bright finish, fluid with heating element heater axially flow when, substantially laminar flow,
It is not high with respect to heat exchange efficiency.Another kind of heating element heater is provided with fin, considerably increases heat exchange area, but its fluid can only be vertical
Axially flow in heating element heater.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of to adopt boron nitride as insulation
The electrical heating elements of material, can greatly improve heater element power density, using temperature, the class of insulation and dielectric strength, together
When improve the heat exchange efficiency of electrical heating elements.
According to this utility model provide technical scheme, electrical heating elements of the employing boron nitride as insulant,
Including electrothermal tube outer tube, it is characterized in that：The inner chamber of the electrothermal tube outer tube includes hot zone and cold end, equal in hot zone and cold end
Filling boron nitride powder；Heating wire is set in the boron nitride powder of the hot zone, cold pin is set in the boron nitride powder of cold end；
The outer surface of the electrothermal tube outer tube arranges spiral radiating surface.
Further, one end of the cold pin is connected with heating wire, and the other end of cold pin is stretched out by the end of cold end.
Further, the radiating surface is raised in the surface of electrothermal tube outer tube, and cross section is in arc surface.
Further, distance of the top of the radiating surface away from electrothermal tube outer pipe surface is 1 ~ 2mm.
Employing boron nitride described in the utility model can greatly improve heating element heater as the electrical heating elements of insulant
Power density, using temperature, the class of insulation and dielectric strength；Meanwhile, electrical heating of this utility model using novel surface structure
Element, employs spiral helicine radiating surface in heater element surface, substantially increases the heat exchange efficiency of electrical heating elements.
Description of the drawings
Fig. 1 is the structural representation of electrical heating elements described in the utility model.
I enlarged drawings of the Fig. 2 for Fig. 1.
Specific embodiment
With reference to concrete accompanying drawing, the utility model is described in further detail.
As shown in Fig. 1～Fig. 2：The employing boron nitride as insulant electrical heating elements include electrothermal tube outer tube 1,
Heating wire 2, boron nitride powder 3, cold pin 4, radiating surface 5, hot zone A, cold end B etc..
As shown in figure 1, electrical heating elements of the employing boron nitride described in the utility model as insulant, including electrothermal tube
Outer tube 1, the inner chamber of electrothermal tube outer tube 1 include hot zone A and cold end B, and in hot zone, A and cold end B fill boron nitride powder 3；
Heating wire 2 is set in the boron nitride powder 3 of the hot zone A, cold pin 4 is set in the boron nitride powder of cold end B（That is conducting rod）, it is cold
One end of pin 4 is connected with heating wire 2, and the other end of cold pin 4 is stretched out by the end of cold end B.
As shown in Fig. 2 the outer surface in the electrothermal tube outer tube 1 arranges spiral radiating surface 5, radiating surface 5 is raised in
The surface of electrothermal tube outer tube 1, cross section is in arc surface, and the distance of the top of the radiating surface 5 away from 1 surface of electrothermal tube outer tube is 1 ~
2mm。
Electrical heating elements of the use boron nitride described in the utility model as insulant, using boron nitride powder as insulation material
Material, up to 2000 DEG C of the maximum operation (service) temperature of boron nitride, heat conductivity is high, and its insulating properties, temperature resistant grade, heat conductivity are much
Be better than magnesium oxide, using boron nitride as insulant after, can greatly improve heater element power density, using temperature, absolutely
Edge grade and dielectric strength.
In addition, Surface Machining spiral helicine radiating surface of this utility model in electrical heating elements, but height is high, about
1 ~ 2mm, when fluid axially flows along heating element heater, mostly laminar flow, flow process are uneven；As spiral helicine radiating surface is caused
Fluid changes flow direction in heating element heater, increases flow process, and flow direction changes the laminar flow layer that can destroy fluid, so considerably increases heating
The heat exchange efficiency of element.
Claims (4)
1. a kind of electrical heating elements of employing boron nitride as insulant, including electrothermal tube outer tube（1）, it is characterized in that：It is described
Electrothermal tube outer tube（1）Inner chamber include hot zone（A）And cold end（B）, in hot zone（A）And cold end（B）Boron nitride powder is filled
（3）；In the hot zone（A）Boron nitride powder（3）Middle setting heating wire（2）, in cold end（B）Boron nitride powder in cold pin is set
（4）；In the electrothermal tube outer tube（1）Outer surface spiral radiating surface is set（5）.
2., as claimed in claim 1 using boron nitride as the electrical heating elements of insulant, it is characterized in that：The cold pin
（4）One end and heating wire（2）Connection, cold pin（4）The other end by cold end（B）End stretch out.
3., as claimed in claim 1 using boron nitride as the electrical heating elements of insulant, it is characterized in that：The radiating surface
（5）It is raised in electrothermal tube outer tube（1）Surface, cross section be in arc surface.
4., as claimed in claim 3 using boron nitride as the electrical heating elements of insulant, it is characterized in that：The radiating surface
（5）Top away from electrothermal tube outer tube（1）The distance on surface is 1 ~ 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037920.1U CN206042393U (en) | 2016-09-05 | 2016-09-05 | Adopt electric heating element of boron nitride as insulating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037920.1U CN206042393U (en) | 2016-09-05 | 2016-09-05 | Adopt electric heating element of boron nitride as insulating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206042393U true CN206042393U (en) | 2017-03-22 |
Family
ID=58298366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621037920.1U Expired - Fee Related CN206042393U (en) | 2016-09-05 | 2016-09-05 | Adopt electric heating element of boron nitride as insulating material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206042393U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211377A (en) * | 2016-09-05 | 2016-12-07 | 无锡富而凯奥克电气有限公司 | Use boron nitride as the electrical heating elements of insulant |
-
2016
- 2016-09-05 CN CN201621037920.1U patent/CN206042393U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211377A (en) * | 2016-09-05 | 2016-12-07 | 无锡富而凯奥克电气有限公司 | Use boron nitride as the electrical heating elements of insulant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 |