CN200970630Y - Electric heater for low voltage casting machine - Google Patents
Electric heater for low voltage casting machine Download PDFInfo
- Publication number
- CN200970630Y CN200970630Y CN 200620126443 CN200620126443U CN200970630Y CN 200970630 Y CN200970630 Y CN 200970630Y CN 200620126443 CN200620126443 CN 200620126443 CN 200620126443 U CN200620126443 U CN 200620126443U CN 200970630 Y CN200970630 Y CN 200970630Y
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- electric heater
- heating element
- electric heating
- service life
- radiant tube
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Abstract
This utility model low-pressure casting machine electric heater includes radiant tube, electric heating element and insulation rack; the electric heating element adopts band-shaped electrical heating alloy material, which winds on the insulation rack; the design is rational, structure is compact, the surface area of electric heating element is large, the heating power is large, the thermal radiation is even, operation is reliable, maintenance is convenient, service life is long; the resistivity of the electric heating element which adopts Aludirome material is high, the temperature coefficient of resistance is small, the oxidation resistance and corrosion resistance is better, high temperature can be endured, service life is long, weight is light, materials are saved, price is low, the size of electric heating element can be increased and surface load can be decreased, so as to extend the service life; this utility model manufactures the radiant tube with carborundum high-temperature refractory material, the thermometric conductivity is high, the hot strength is high, featured with abrasion proof, heat vibration proof and erosion proof, the aluminum liquid proof erosion is stronger and service life is fine.
Description
Technical field
The utility model belongs to the metal casting machine technical field, relates to a kind of air injection machine, relates in particular to a kind of air injection machine electric heater.
Background technology
Fast development along with Domestic Automotive Industry, manufacturing to wheel hub requires more and more higher, be the requirement that the version that satisfies auto parts and components lightweight and wheel hub is maked rapid progress, adopting the low pressure casting technology to produce aluminium alloy wheel hub has in a large number become present development trend; In other field, as aviation, textile machinery etc., also all gradually adopting low pressure casting spare, to improve the quality of products, reduce machining, alleviate weight of equipment.As shown in Figure 1, the air injection machine of existing homemade and import, the electric heater that in airtight holding furnace (crucible), uses, its heating 2 adopts trade mark circle filate nichrome resistance wires such as Ni80Cr20, and for reaching certain use power, adopt the coiling mode of axially-aligned, its periphery generally also is with stainless steel radiant tube 1, otherwise melt metal liquid easily splashes down on resistance wire, cause the local resistance of resistance wire inhomogeneous and overheated, make its too early damage.This electric heater is because heating 2 is circular cross-section and the coiling mode that adopts axially-aligned, its surface loading is big, and the heat radiation of ectonexine resistance wire is very inhomogeneous, and maximum operation (service) temperature generally is no more than 1100 ℃, service life is shorter, and the price of nichrome heating is higher.In addition, the stainless steel radiant tube 1 that this electric heater adopts at high temperature is easy to flexural deformation, is not easy to the dismounting maintenance, even can produce burn into and fall slag, perforation, has both had influence on the practical function of radiant tube 1, simultaneously, also can influence the composition of molten metal such as aluminium alloy.Existing air injection machine also has the electric heater of employing Elema as heating, but also can not solve the problem that heating element heater price height, life-span weak point and radiant tube are easy to the burn into distortion all the time, also, more be unfavorable for the maintenance and repair of electric heater because its power connection can only be two ends outlet form.
Summary of the invention
At the deficiency of above-mentioned air injection machine electric heater, the purpose of this utility model is, a kind of air injection machine electric heater is provided, and it not only can reliably use, and can also reduce cost, and increases the service life, and is convenient to maintenance.
The technical solution adopted in the utility model is:
A kind of air injection machine electric heater comprises radiant tube, heating and insulating frame, it is characterized in that, described heating adopts bandlet shape electrothermal alloy, and spiral turns is on insulating frame.
Described bandlet shape electrothermal alloy adopts siderochrome aluminium electrothermal alloy material.
Described radiant tube adopts carbofrax material.
The utility model air injection machine electric heater, changed the form of existing electric heater circle filate heating axially-aligned, adopt bandlet shape heating spiral turns around form, it is reasonable in design, compact conformation, the heating surface area is big, heating power is big, and heat radiation is even, and is reliable, easy to maintenance, long service life.The utility model is in conjunction with the said structure form of bandlet shape heating, further rationally adopt the Aludirome material to be used for heating, compare with the employing nichrome, has the resistivity height, temperature-coefficient of electrical resistance is little, anti-oxidant, corrosion resistance is better, the high temperature resistant life-span is long, and is in light weight, and materials are economized, advantages such as low price, not only can improve maximum operation (service) temperature (can reach 1250 ℃), particularly utilize the high characteristics of its resistance coefficient, strengthen the dimensions of heating, reduce its surface loading, thereby can prolong its service life more.The utility model adopts the carborundum high-temperature refractory to make radiant tube, the thermal conductivity height, elevated temperature strength is big, characteristics such as wear-resisting, heat-resisting shake, anti-erosion, stronger anti-aluminium liquid aggressivity is arranged, have gratifying service life, avoided under the stainless steel radiant tube high temperature distortion, burn into to fall the adverse effect that slag, perforation etc. are produced.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Description of drawings
Fig. 1 is existing air injection machine electric heater heating axially-aligned coiling schematic views;
Fig. 2 is the utility model air injection machine electric heater schematic views;
Fig. 3 be among Fig. 2 A-A to bandlet shape heating cross section schematic views;
In the above-mentioned accompanying drawing: the 1-radiant tube; The 2-heating; The 2a-power connection; The 3-insulating frame.
The specific embodiment
Embodiment one:
As shown in Figure 2, present embodiment air injection machine electric heater mainly is made up of radiant tube 1, heating 2 and insulating frame 3, and integral installation is in holding furnace.The cross section of the heating 2 of the utility model bandlet shape as shown in Figure 3, its thickness B is in 1～5mm scope, width W is in 8～50mm scope, it is 2.5mm that present embodiment adopts thickness B, width W is the bandlet heating 2 of 20mm, it is the siderochrome aluminium electrothermal alloy of 0Cr25Al5 that its material adopts the trade mark, also can adopt the siderochrome aluminium electrothermal alloy material of Ocr21Al6Nb, Ocr27Al7Mo2 and other trades mark.Heating 2 spiral turns are on ceramic high temperature insulation frame 3, and its power connection 2a passes from the end face of insulating frame 3 one ends, join with 220 volts of AC powers.Present embodiment adopts silicon carbide material to make radiant tube 1, and carborundum content is 97%, the sealing of radiant tube 1 one ends, other end opening, wall thickness is 8mm, is fixedly mounted in the holding furnace, and the heating 2 of spiral turns on the insulating frame 3 packed into and fixing from the openend of radiant tube 1.
The foregoing description is as an illustration example only, is not the qualification that the utility model is done.In addition to the implementation, the utility model can also have other embodiments, does not give unnecessary details one by one at this.Every employing is equal to the technical scheme of replacement or equivalent transformation formation, all belongs to the protection domain of the utility model requirement.
Claims (5)
1, a kind of air injection machine electric heater comprises radiant tube (1), heating (2) and insulating frame (3), it is characterized in that, described heating (1) adopts bandlet shape electrothermal alloy, and spiral turns is on insulating frame (3).
2, a kind of air injection machine electric heater according to claim 1 is characterized in that, described bandlet shape electrothermal alloy adopts siderochrome aluminium electrothermal alloy material.
3, a kind of air injection machine electric heater according to claim 1 and 2 is characterized in that, described bandlet shape electrothermal alloy, its thickness (B) are in 1～5mm scope, and width (W) is in 8～50mm scope.
4, a kind of air injection machine electric heater according to claim 1 is characterized in that, described radiant tube (1) adopts carbofrax material.
5, according to claim 1 or 4 described a kind of air injection machine electric heaters, it is characterized in that described radiant tube, wall thickness are 6～12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126443 CN200970630Y (en) | 2006-10-16 | 2006-10-16 | Electric heater for low voltage casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126443 CN200970630Y (en) | 2006-10-16 | 2006-10-16 | Electric heater for low voltage casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200970630Y true CN200970630Y (en) | 2007-11-07 |
Family
ID=38881889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620126443 Expired - Fee Related CN200970630Y (en) | 2006-10-16 | 2006-10-16 | Electric heater for low voltage casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200970630Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105722260A (en) * | 2016-04-07 | 2016-06-29 | 安徽永成电气有限公司 | Fin separating-sheet type helical radiant tube |
| CN107030270A (en) * | 2017-05-05 | 2017-08-11 | 洛阳辰祥机械科技有限公司 | A kind of design method of electromechanical heater of low pressure casting |
-
2006
- 2006-10-16 CN CN 200620126443 patent/CN200970630Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105722260A (en) * | 2016-04-07 | 2016-06-29 | 安徽永成电气有限公司 | Fin separating-sheet type helical radiant tube |
| CN107030270A (en) * | 2017-05-05 | 2017-08-11 | 洛阳辰祥机械科技有限公司 | A kind of design method of electromechanical heater of low pressure casting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |