CN206256157U - A kind of plasma spraying stainless steel tube electrothermal device - Google Patents
A kind of plasma spraying stainless steel tube electrothermal device Download PDFInfo
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- CN206256157U CN206256157U CN201621255770.1U CN201621255770U CN206256157U CN 206256157 U CN206256157 U CN 206256157U CN 201621255770 U CN201621255770 U CN 201621255770U CN 206256157 U CN206256157 U CN 206256157U
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Abstract
The utility model discloses a kind of plasma spraying stainless steel tube electrothermal device, it includes stainless steel tube, stainless steel tube outer circumference surface is by plasma spraying mode blasting medium layer, dielectric layer outer surface sprays resistive layer by plasma spraying mode, resistive layer outer surface sprays encapsulated layer by plasma spraying mode, and resistive layer sets the electrode for exposing to encapsulated layer；Dielectric layer is ceramics or glass dust last layer；Resistive layer is molybdenum powder last layer, niobium powder layer, nickel powder last layer, molybdenum alloy powder last layer, niobium alloy powder layer or nickel alloy powder last layer；Encapsulated layer is ceramic powder or glass dust last layer.The plasma spraying stainless steel tube electrothermal device sprays to form dielectric layer, resistive layer, encapsulated layer using low cost plasma spraying technology, production material low cost, production efficiency are high, and production efficiency and product percent of pass can be effectively improved by the one-time formed mode of powder direct spraying, adhesion between dielectric layer, resistive layer, encapsulated layer is strong, and product reliability is good.
Description
Technical field
The utility model is related to thermo electric material technical field, more particularly to a kind of plasma spraying stainless steel tube electric heater
Part.
Background technology
Plasma spraying is to use rigidity plasma arc for thermal source, the heat spraying method based on dusty spray material, etc.
Ion arc is the abbreviation of plasma arcs；Plasma refers to that gas is partly or entirely ionized under superelevation temperature state, is formed
Negative ions（Electronics）Quantity is equal and the overall electric conductor in electroneutral.Electric arc is in itself plasma, but only works as electric arc
Compressed by thermal pinch, from magnetic compression effect, mechanical compress effect, during as compression arc with higher temperature,
Just it is referred to as plasma arcs, its central temperature can reach 10000 DEG C -50000 DEG C, and temperature so high makes all of metal and pottery
Ceramic material can be sprayed.
Need to be explained further, plasma spraying technology has been widely used in space technology, and gradually start to answer
For automobile, the advantage of this technology is good heat-insulation effect, can bear high temperature and high pressure, technical maturity, steady quality；Be up to
To the target of low heat emission, ceramic spraying, such as zirconium oxide of piston top spray, the oxygen of cylinder sleeve spray can be carried out to engine chamber part
Change zirconium etc., can reduce radiation loss by the engine of this treatment, mitigate engine sole mass, reduction engine chi
Very little, reduction fuel consumption.With the progress of technology, it is each that plasma spraying technology will widely be applied to each row
Industry.
It should further be noted that existing thick-film electric heater part dielectric layer is main in stainless steel substrate, ceramic base material, glass baseplate
It is upper to be completed by silk-screen repeatedly/sintered glass glaze, low production efficiency, high cost, and product defects is difficult to control to, material is selected
Select be limited in scope, performance is difficult to be lifted.
Utility model content
The purpose of this utility model is in view of the shortcomings of the prior art and provides a kind of plasma spraying stainless steel tube electricity
Thermal device, the plasma spraying stainless steel tube electrothermal device sprays to form dielectric layer, electricity using low cost plasma spraying technology
Resistance layer, encapsulated layer, production material low cost, production efficiency are high, and can be effective by the one-time formed mode of powder direct spraying
Ground improve production efficiency and product percent of pass, the adhesion between dielectric layer, resistive layer, encapsulated layer are strong, and product is reliable and stable
Property is good.
To reach above-mentioned purpose, the utility model is achieved through the following technical solutions.
A kind of plasma spraying stainless steel tube electrothermal device, includes in the stainless steel tube of round tube shape, stainless steel tube
Outer circumference surface is coated with dielectric layer by plasma spraying mode, and the outer surface of dielectric layer is coated with by plasma spraying mode
Resistive layer, the outer surface of resistive layer is coated with encapsulated layer by plasma spraying mode, and resistive layer is provided with and exposes to encapsulated layer
Electrode；
Dielectric layer is ceramic powder last layer or glass dust last layer；
Resistive layer is that molybdenum powder last layer, niobium powder layer, nickel powder last layer, molybdenum alloy powder last layer, niobium alloy powder layer or nickel are closed
Bronze last layer；
Encapsulated layer is ceramic powder last layer or glass dust last layer.
Wherein, the thickness of the dielectric layer is 30 μm -500 μm.
Wherein, the thickness of the resistive layer is 15 μm -50 μm.
Wherein, the thickness of the encapsulated layer is 30 μm -50 μm.
The beneficial effects of the utility model are：A kind of plasma spraying stainless steel tube electric heater described in the utility model
Part, includes in the stainless steel tube of round tube shape, and the outer circumference surface of stainless steel tube is coated with medium by plasma spraying mode
Layer, the outer surface of dielectric layer is coated with resistive layer by plasma spraying mode, and the outer surface of resistive layer passes through plasma spraying
Mode is coated with encapsulated layer, and resistive layer is provided with the electrode for exposing to encapsulated layer；Dielectric layer is ceramic powder last layer or glass dust
Last layer；Resistive layer is molybdenum powder last layer, niobium powder layer, nickel powder last layer, molybdenum alloy powder last layer, niobium alloy powder layer or nickel alloy powder
Last layer；Encapsulated layer is ceramic powder last layer or glass dust last layer.The plasma spraying stainless steel tube electrothermal device is using low cost
Plasma spraying technology sprays to form dielectric layer, resistive layer, encapsulated layer, and production material low cost, production efficiency are high, and by powder
The last one-time formed mode of direct spraying can effectively improve production efficiency and product percent of pass, dielectric layer, resistive layer, encapsulation
Adhesion between layer is strong, and product reliability is good.
Brief description of the drawings
The utility model is further detailed below with accompanying drawing, but the embodiment in accompanying drawing do not constitute it is right
Any limitation of the present utility model.
Fig. 1 is the tube wall profile of plasma spraying stainless steel tube electrothermal device of the present utility model.
Include in Fig. 1：
1 --- stainless steel tube
2 --- dielectric layer
3 --- resistive layer
4 --- encapsulated layer.
Specific embodiment
The utility model is illustrated with reference to specific embodiment.
As shown in figure 1, a kind of plasma spraying stainless steel tube electrothermal device, includes in the stainless steel tube 1 of round tube shape,
The outer circumference surface of stainless steel tube 1 is coated with dielectric layer 2 by plasma spraying mode, and the outer surface of dielectric layer 2 passes through plasma
Spraying method is coated with resistive layer 3, and the outer surface of resistive layer 3 is coated with encapsulated layer 4, resistive layer 3 by plasma spraying mode
It is provided with the electrode for exposing to encapsulated layer 4；
Dielectric layer 2 is ceramic powder last layer or glass dust last layer；
Resistive layer 3 is that molybdenum powder last layer, niobium powder layer, nickel powder last layer, molybdenum alloy powder last layer, niobium alloy powder layer or nickel are closed
Bronze last layer；
Encapsulated layer 4 is ceramic powder last layer or glass dust last layer.
Wherein, the thickness of the dielectric layer 2 is 30 μm -500 μm, and the thickness of the resistive layer 3 is 15 μm -50 μm, institute
The thickness for stating encapsulated layer 4 is 30 μm -50 μm.
It should further be noted that plasma spraying stainless steel tube electrothermal device of the present utility model is sprayed using low cost plasma
Painting technology sprays to form dielectric layer 2, resistive layer 3, encapsulated layer 4, and production material low cost, production efficiency are high and straight by powder
Connecing the one-time formed mode of spraying can effectively improve production efficiency and product percent of pass, dielectric layer 2, resistive layer 3, encapsulated layer
Adhesion between 4 is strong, and product reliability is good.
In addition, plasma spraying stainless steel tube electrothermal device of the present utility model can be using the preparation of following preparation method
Into specifically, a kind of preparation method of plasma spraying stainless steel tube electrothermal device, it is characterised in that include following technique
Step, specially：
A, cleaning stainless steel tube 1 simultaneously cause that stainless steel tube 1 keeps clean；
B, the outer circumference surface that ceramic powders or glass powder are sprayed at stainless steel tube 1 by plasma spraying equipment,
Dielectric layer 2 is formed to spray；
C, after dielectric layer 2 spraying finish after, by plasma spraying equipment by thermo electric material powder spray in dielectric layer 2
Outer surface, to form resistive layer 3；Wherein, thermo electric material powder is molybdenum powder, niobium powder, nickel by powder, molybdenum alloy powder, niobium conjunction
A kind of or at least two mixed-powders for being constituted in bronze end, Ni alloy powder；
D, after resistive layer 3 spraying finish after, prepare electrode in resistive layer 3；
E, after electrode prepare finish after, ceramic powders or glass powder are sprayed at by resistance by plasma spraying equipment
The outer surface of layer 3, to form encapsulated layer 4.
Wherein, the power output of the plasma spraying equipment be 500w-500kw, plasma spraying equipment using nitrogen,
One or more mixed gas in argon gas, helium, hydrogen are protected, the spraying powder feeding pressure 0.5 of plasma spraying equipment
MPa -5MPa, powder pushing precision ± 0.5%- ± 2% of plasma spraying equipment, the kg/min of powder sending quantity 0 of plasma spraying equipment
-2kg/min。
The other plasma spraying stainless steel tube electrothermal device dieletric strength：1500-3500V；Electrical insulating property：＞ 108M
Ω；Leakage current：＜ 0.5mA（1.06 times of operating voltages）；Thermal shock resistance properties：500 DEG C of water quenchings（20 DEG C of water temperature）5 times, microscope is seen
Examine flawless.
Above content is only preferred embodiment of the present utility model, for one of ordinary skill in the art, according to this reality
With new thought, will change in specific embodiments and applications, this specification content should not be construed as
To limitation of the present utility model.
Claims (4)
1. a kind of plasma spraying stainless steel tube electrothermal device, it is characterised in that：Include in the stainless steel tube of round tube shape
（1）, stainless steel tube（1）Outer circumference surface dielectric layer is coated with by plasma spraying mode（2）, dielectric layer（2）Outer surface
Resistive layer is coated with by plasma spraying mode（3）, resistive layer（3）Outer surface envelope is coated with by plasma spraying mode
Dress layer（4）, resistive layer（3）It is provided with and exposes to encapsulated layer（4）Electrode；
Dielectric layer（2）It is ceramic powder last layer or glass dust last layer；
Resistive layer（3）It is molybdenum powder last layer, niobium powder layer, nickel powder last layer, molybdenum alloy powder last layer, niobium alloy powder layer or nickel alloy
Powder bed；
Encapsulated layer（4）It is ceramic powder last layer or glass dust last layer.
2. a kind of plasma spraying stainless steel tube electrothermal device according to claim 1, it is characterised in that：The dielectric layer
（2）Thickness be 30 μm -500 μm.
3. a kind of plasma spraying stainless steel tube electrothermal device according to claim 1, it is characterised in that：The resistive layer
（3）Thickness be 15 μm -50 μm.
4. a kind of plasma spraying stainless steel tube electrothermal device according to claim 1, it is characterised in that：The encapsulated layer
（4）Thickness be 30 μm -50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621255770.1U CN206256157U (en) | 2016-11-23 | 2016-11-23 | A kind of plasma spraying stainless steel tube electrothermal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621255770.1U CN206256157U (en) | 2016-11-23 | 2016-11-23 | A kind of plasma spraying stainless steel tube electrothermal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206256157U true CN206256157U (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621255770.1U Active CN206256157U (en) | 2016-11-23 | 2016-11-23 | A kind of plasma spraying stainless steel tube electrothermal device |
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| Country | Link |
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| CN (1) | CN206256157U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637043A (en) * | 2016-11-23 | 2017-05-10 | 东莞珂洛赫慕电子材料科技有限公司 | Electric heating device with plasma-sprayed stainless steel tube |
| CN107312994A (en) * | 2017-08-09 | 2017-11-03 | 东莞市晶磁科技有限公司 | A kind of thermal spraying electrothermal device and preparation method thereof |
-
2016
- 2016-11-23 CN CN201621255770.1U patent/CN206256157U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637043A (en) * | 2016-11-23 | 2017-05-10 | 东莞珂洛赫慕电子材料科技有限公司 | Electric heating device with plasma-sprayed stainless steel tube |
| CN107312994A (en) * | 2017-08-09 | 2017-11-03 | 东莞市晶磁科技有限公司 | A kind of thermal spraying electrothermal device and preparation method thereof |
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