CN104470006B - Flexible graphite sheet twisting type electric heating tube and manufacturing method thereof - Google Patents
Flexible graphite sheet twisting type electric heating tube and manufacturing method thereof Download PDFInfo
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- CN104470006B CN104470006B CN201410778262.0A CN201410778262A CN104470006B CN 104470006 B CN104470006 B CN 104470006B CN 201410778262 A CN201410778262 A CN 201410778262A CN 104470006 B CN104470006 B CN 104470006B
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Abstract
The invention discloses a flexible graphite sheet twisting type electric heating tube and a manufacturing method of the flexible graphite sheet twisting type electric heating tube. The manufacturing method comprises the steps that an ultra-thin flexible graphite sheet is adopted as an electric heating element twisting around the outer surface of an insulator; afterwards, red copper foil is adopted as electrodes at the two ends of the ultra-thin flexible graphite sheet and connected with a mains supply; thus, water on the inner surface of the insulator is heated, and therefore the instant heating water and electricity separation type electric heating tube is obtained; the outer layer of the graphite sheet is wrapped in an insulating and thermal-insulation material for electric insulation and heat preservation, and the insulating and thermal-insulation material is fiberglass cloth and/or PTFE high-temperature cloth; the heat flux of a heater can reach 0.6-0.8 MW/m<2>; the safety problem caused by overtemperature of the outer surface of the heating tube at high heat flux and the problem of tube bursting caused by the phenomenon that a fluid area inside the heating tube boils and becomes unstable are solved at the same time, and therefore safety is quite high.
Description
Technical field
The present invention relates to a kind of technology in articles for daily use field, specifically a kind of flexible graphite platelet wound form electrical heating
Pipe and preparation method thereof.
Background technology
Instant electric water heater is more and more widely used in our daily life, with respect to water-storage electric heater
For, its volume small-power is big, and firing rate is fast.The safety of instant electric water heater to be ensured is it is most important that see its heating
Method.All more or less there are some problems in current heating means, could be improved.
By inquiry existing instant electric water heater present situation it has been found that metal electric heating pipe heat easy scaling, and
And easily burn out under high heat flux, surface coating heating requires relatively strictly to coating process, relatively costly, in addition, existing
With the presence of the instant electric water heater's booster problem using the heating of plated film quartz ampoule, security performance is bad.
Graphite flake is a kind of brand-new Heat Conduction Material, its along both direction heat conduction uniformly, surface can with metal, plastic cement,
The other materials such as adhesive sticker combine to meet more design functions and needs；There is high thermal conductivity factor (150～1200w/
M k), its heat conductivility is not worse than the heat conduction of metal, and, up to 400 DEG C, thermal resistance is low for its heatproof, is a kind of more satisfactory heating
Material.Have been provided with stable and efficient graphite flake industrial production technology at present, flexible graphite platelet with low cost, high temperature resistant
And stable performance, the research and development for our electric heater lay a good foundation.
Find through the retrieval to prior art, Chinese patent literature cn103801227a open (bulletin) day
2014.05.21, disclose a kind of diamond graphite tubular type heating arrangement, it is used for a synthesis post is heated, its bag
Include pyrophyllite block, steel cap, graphite flake, graphite-pipe, ceramic cup and steel bowl；Wherein, described pyrophyllite block is located at outermost layer；Described
Steel cap is respectively arranged at top and the bottom of pyrophyllite block；The bottom of described steel cap is connected on graphite flake；Described steel bowl, pottery
Cup, graphite-pipe are coated on synthesis post successively；Described graphite flake is located at the upper and lower ends of graphite-pipe；Described graphite-pipe is no interface
Graphite-pipe., using the graphite-pipe of compacting, its density is high and uniform for the diamond graphite tubular type heating arrangement of this technology, with
When there is no interface, there is heating uniformly to during synthesis post heating, firing rate is fast, is conducive to the growth of diamond.But this technology
Using graphite-pipe as heating element heater, the resistance meeting very little of heater element, need to mate special small voltage high-current supply
Can use, therefore be only applicable to special industrial processes, and conventional civilian 220 volts or 110 volts can not be generally applicable to
Power supply.
Content of the invention
The present invention be directed to deficiencies of the prior art, propose a kind of flexible graphite platelet wound form electric heating tube and its
Preparation method, using thickness for 0.01mm～0.5mm ultrathin flexible graphite flake as heating element heater, is wrapped in insulator surface pair
Heating object is heated, and wraps up insulation and thermal insulation material, be electrically insulated and isothermal holding outside graphite flake.The present invention has
Have and stablize durable, high-energy and high-efficiency, the with low cost and simple feature of manufacture craft, by controlling its thickness and canoe easy
Process and mate suitable resistance it is adaptable to various different power supply type；Its good flexibility characteristics, be also applied for various not
Similar shape and the heating object of power, can be widely applied to all kinds of electric heating equipments, are not only suitable for high-volume industrial production,
It is used in design and the making of the simple high energy heater in laboratory.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of preparation method of flexible graphite platelet wound form electric heating tube, made using ultrathin flexible graphite flake
It is wound in the outer surface of insulator for electrical heating elements, then adopt red copper foil as electrode at the two ends of ultrathin flexible graphite flake
And be connected with power supply, thus insulator body water is heated, realize instantaneously heated hydroelectric Split type electric heating tube.
Described graphite flake outer layer covers have insulation and thermal insulation material to be electrically insulated and isothermal holding, this insulation and thermal insulation material
Material is preferably glass fabric and/or the dilute high temperature cloth of poly- tetrem.
The present invention relates to the flexible graphite platelet wound form electric heating tube that said method prepares, it is possible to achieve 0.6～
0.8mw/m2Heat flow density up to and the resistivity of graphite has negative temperature effect, and the heating tube that it is made will not be in time
And reduce power；
The thickness of described ultrathin flexible graphite flake is 0.01mm～0.5mm.
Described insulator using but be not limited to quartz glass, pottery, anodic oxidation insulation aluminum alloy and/or through surface at
The non-conductive tubing of reason.
Technique effect
Compared with prior art, the present invention adopts ultrathin flexible graphite flake as electrical heating elements, and its thermal conductivity factor is high, plus
The temperature homogeneity of tube surface is good, and graphite flake is high temperature resistant, can keep good integrality in heating process.Can realize
High heat flow density (0.6～0.8mw/m2).
It is 100mm length for 1 effective heated length (the distance between electrode), external diameter is the electric heating tube of 20mm, plus
Thermal power can reach the power of about 3700～4900kw；Under solution high heat flux, heating tube hull-skin temperature is too high simultaneously deposits
Safety issue and heating tube internal flow region there is the boiling booster problem that leads to of wild effect, security is very
Good.
Brief description
Fig. 1 is present configuration schematic diagram.
Specific embodiment
Below embodiments of the invention are elaborated, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following enforcements
Example.
Embodiment 1
As shown in figure 1, the present embodiment includes: insulation heating pipe matrix 1, be wound in heating tube outer surface of matrix ultrathin flexible
The red copper foil electrode 2 at graphite flake 3 and its two ends and graphite flake outer layer covers insulation and thermal insulation material 4.
Described insulation heating pipe matrix employs the good alumina ceramic tube of thermal conductivity 1, and it is a kind of with aluminum oxide
al2o3For the ceramic material of main body, there is preferable conductibility, high mechanical strength, and heat-resisting quantity, in 0.8mw/m2Hyperpyrexia
Under current density, the temperature of ceramic tube outer surface is less than 400 DEG C, and security is good.
The heating element heater of described heating tube adopts graphite flake 3, and its thermal conductivity factor is high, the temperature homogeneity of heating pipe surface
Good, and graphite flake is high temperature resistant, can keep good integrality in heating process.And flexible graphite platelet is easy to cut out, Ke Yigen
Easily produce different shape according to different needs and mate power supply, power and resistance；Ultrathin flexible graphite flake has simultaneously
Flexility is perfectly wound around or is fitted in heated insulator surface and has excellent lateral thermal conductivity energy well
1000w/m k, enables heat and efficiently transmits, and makes the heater designed have the characteristics that high-energy and high-efficiency.
Described heating tube connects common power, graphite flake using red copper foil 2 as electrode at ultrathin flexible graphite flake two ends
Outer layer covers insulation and thermal insulation material 4 such as glass fabric, the dilute high temperature cloth of poly- tetrem etc. are electrically insulated and isothermal holding.This
Electricity separation formula electric heating tube can realize high heat flow density.
In this embodiment, described earthenware 1 length is 120mm, a diameter of 16mm, and graphite flake 3 thickness is 0.05mm,
Length is 800mm, and width is 4mm；Graphite flake is wrapped in outside earthenware 1 in the way of snakelike winding and occupies 80mm pipe range,
The two ends of graphite flake 3 connect red copper foil electrode 2 respectively, then wrap up floor height temperature insulation and thermal insulation glass fibers in graphite flake outer surface
Dimension cloth 4 simultaneously pastes fixation, and the method makes simply, and cheap, the heating tube power of making can reach more than 3kw, and hot-fluid is close
Degree can reach 70w/cm2, there is good practical value.
Claims (1)
1. a kind of preparation method of flexible graphite platelet wound form electric heating tube is it is characterised in that the heat flow density of this electric heating tube
Reach 0.6～0.8mw/m2, it is wound in the outer surface of insulator, Ran Hou as electrical heating elements using ultrathin flexible graphite flake
The two ends of ultrathin flexible graphite flake are electrically connected as electrode and with city using red copper foil, thus insulator body water are carried out adding
Heat, realizes instantaneously heated hydroelectric Split type electric heating tube；
Described graphite flake outer layer covers have insulation and thermal insulation material to be electrically insulated and isothermal holding；
Described insulation and thermal insulation material is glass fabric and/or the dilute high temperature cloth of poly- tetrem；
The thickness of described ultrathin flexible graphite flake is 0.01mm～0.5mm；
Described insulator adopts quartz glass, pottery, anodic oxidation insulation aluminum alloy or a combination thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778262.0A CN104470006B (en) | 2014-12-15 | 2014-12-15 | Flexible graphite sheet twisting type electric heating tube and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778262.0A CN104470006B (en) | 2014-12-15 | 2014-12-15 | Flexible graphite sheet twisting type electric heating tube and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN104470006A CN104470006A (en) | 2015-03-25 |
| CN104470006B true CN104470006B (en) | 2017-01-18 |
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| CN201410778262.0A Active CN104470006B (en) | 2014-12-15 | 2014-12-15 | Flexible graphite sheet twisting type electric heating tube and manufacturing method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768243A (en) * | 2015-04-07 | 2015-07-08 | 上海交通大学 | Graphite sheet electrical heating component and manufacturing method thereof |
| CN104946862A (en) * | 2015-07-20 | 2015-09-30 | 柳州市建西机械铸造厂 | Heat treatment device |
| CN105860938B (en) * | 2016-03-28 | 2018-11-23 | 上海交通大学 | Strengthen the graphite film and preparation method thereof of critical heat flux density |
| CN112524794A (en) * | 2020-11-27 | 2021-03-19 | 广东欧亚冠金属新材料有限公司 | Instant heating type pipeline heater and manufacturing method thereof |
| CN113180458A (en) * | 2021-06-21 | 2021-07-30 | 上海交通大学 | Three-dimensional heat generation electric heating inner container |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2658692B1 (en) * | 1990-02-16 | 1992-06-05 | Chauffe Cie Gle | ELECTROTHERMAL GENERATOR FOR HEATING LIQUID, WITH AN ELECTRICALLY RESISTANT SPIRAL TAPE ON A TUBE CROSSED BY THE LIQUID. |
| CN1025932C (en) * | 1992-07-16 | 1994-09-14 | 山东大学 | Method for making electric heating film decal paper and application |
| CN200953714Y (en) * | 2006-05-23 | 2007-09-26 | 吴长欣 | Thermal conducting board |
| DE102011018243A1 (en) * | 2011-04-19 | 2012-10-25 | Voss Automotive Gmbh | Multi-layer electrically heatable media line |
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| CN104470006A (en) | 2015-03-25 |
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