CN1083654A - High insulating anti-cementation electrothermal tube and manufacturing process thereof - Google Patents
High insulating anti-cementation electrothermal tube and manufacturing process thereof Download PDFInfo
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- CN1083654A CN1083654A CN 93100726 CN93100726A CN1083654A CN 1083654 A CN1083654 A CN 1083654A CN 93100726 CN93100726 CN 93100726 CN 93100726 A CN93100726 A CN 93100726A CN 1083654 A CN1083654 A CN 1083654A
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- electrothermal tube
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Abstract
The invention discloses a kind of high insulating anti-cementation anticorrosion electrothermal tube and manufacturing process thereof, its profile is for cultrating, principal character is, the insulant of filling is a combined oxidation magnesium powder in the sleeve pipe, seal bushing outer surface spraying anti stick coating, this electrothermal tube heat transfer efficiency height with inorganic fluid sealant with the pipe end inner chamber that is connected base riveted joint place, anticorrosive, anti stick are suitable for the heating to various liquid mediums.
Description
The present invention relates to a kind of submergence heating, non-scaling, etch-proof electrothermal tube and manufacture method thereof of being used for.
Magnesia powder is all adopted in insulation casting resin in the existing electrothermal tube, the easy moisture absorption of magnesia powder, and insulation property are bad, easily electric leakage, the resin glue sealing is all adopted at the electrothermal tube two ends, and the resin glue non-refractory is just softening about 95 ℃, sealing effectiveness is bad, again because the influence of electric field action and water quality, the easy fouling of electrothermal tube outer wall, heat transfer property is bad, above-mentioned factors makes the quality instability of existing electrothermal tube, and useful life is low.
Purpose of the present invention just is, the manufacturing process of a kind of high insulation, high leakproofness, less scaling, etch-proof electrothermal tube and electrothermal tube is provided to society.
Purpose of the present invention can realize with following mode:
This electrothermal tube is formed and is comprised sleeve pipe, heating wire, insulation charges, binding post, base and base cover, the electrothermal tube profile is for cultrating, it is characterized in that, insulation charges in the sleeve pipe are combined oxidation magnesium powder, the sleeve pipe two ends seals with inorganic fluid sealant, spraying anti stick coating on the electric heating shell outer surface.
Combined oxidation magnesium powder component and content are, magnesia powder 78～80%, boron carbide 11～13%, boron oxide 5～7%, calcium oxide 2～4% is crossed 60～120 mesh sieves to above-mentioned magnesia powder, and deironing, oven dry are anhydrated behind the branch, the mixture that adds boron carbide, boron oxide, calcium oxide again, stir.
Described inorganic fluid sealant is formed and is included titanium dioxide, carborundum, nickel dioxide, quartz sand, waterglass, wherein content of titanium dioxide accounts for 15～18%, carborundum content accounts for 26～30%, nickel dioxide content accounts for 6～8%, quartz sand content accounts for 13～15%, waterglass content accounts for 32～36%, mixes back ball milling 200 by above-mentioned prescription
#, stir, add waterglass and mix together.
The composition of described anti stick coating and content thereof are: F-4 dispersion liquid 48.5～49.5%, F-46 dispersion liquid 11～12%, zinc oxide 6～7%, titanium dioxide 2.5～3.5%, mica powder 2.2～2.6%, O～P solvent 1.2～1.5%, tributyl phosphate 0.9～1.1%, white clay 0.6～0.7%, carbon black 0.08～0.11%, distilled water 24.5～25.5% is in the container of packing into behind the above-mentioned raw materials ball milling.
The composition of magnesia powder and content thereof are magnesia powder 95～96%, silica 1 .3～3%, alundum (Al 1～2%, titanium dioxide three-iron 0.3～0.4%, calcium oxide 0.8～1.5%.
Good effect of the present invention: the shell outer surface is sprayed with anti stick coating, non-scaling, anticorrosion, heat efficiency height is under identical heating condition, the comparable general electrothermal tube economize on electricity 15% of electrothermal tube of the present invention, good insulating, national Specification insulation resistance are 2M Ω, compressive resistance 1500V/min, and electrothermal tube insulation resistance of the present invention is 50M Ω, compressive resistance 1600V/min, guarantee safe and reliable, combined oxidation magnesium powder cold insulation resistance 80M Ω, hot and damp attitude insulation resistance 5M Ω, in humidity is 95%, and temperature is under 45 ℃ the condition, to place 48 hours, water absorption rate only is 0.1%, moisture resistivity is extremely strong, and the insulation resistance of inorganic fluid sealant can reach 2500M Ω, its strong adhesion, the sealing intensity height reaches 200～250N/cm
2, airtight, waterproof, can bear 120 ℃ of temperature, not softening; The anti-stick coating good corrosion resistance soaks in 170～250 ℃ acid, alkali, salt, oil solution and do not soften in 2 hours, does not come off, and is non-foaming, is suitable for the heating of liquid towards medium.
Fig. 1 is the structure cutaway view of electrothermal tube;
Fig. 2 is that Fig. 1 is a vertical view.
Below in conjunction with accompanying drawing the present invention and manufacturing process thereof are described further:
By sleeve pipe 1, heating wire 2, combined oxidation magnesium powder charges 3, binding post 4, connect the high insulating anti-cementation electrothermal tube that base 6, base cover 7 are formed, it connects base 6 and base cover 7 is made by aluminium or plastics, connect in the base 6 plastic core 11 is housed, sleeve pipe 1 employing 10, L
2Aluminum pipe, also available T
4, No. 10 steel, heating wire 2 adopts Aludirome (OCr
13AL
16MO
2), maximum operation (service) temperature is 1250 ℃, tensile strength is 700～850N/cm
2The electrothermal tube two ends be connected base 6 riveted joint, enter the inorganic fluid sealant 5 of sleeve pipe 1 inner chamber filling in the base, sleeve pipe 1 outer surface spraying anti stick coating, combined oxidation magnesium meal component content is got respectively in the present embodiment: magnesia powder 79%, boron carbide 12%, boron oxide 6%, calcium oxide 3%, again magnesia powder is crossed 60～120 mesh sieves, deironing, oven dry adds chemical agent (boron carbide again, boron oxide, calcium oxide) stirring promptly is combined oxidation magnesium powder, and wherein the composition of magnesia powder and content are: magnesium oxide 95%, silicon dioxide 2%, alundum (Al 1.5%, titanium dioxide three-iron 0.4%, calcium oxide 1.1%.
The composition of inorganic fluid sealant 5 includes titanium dioxide 16.3%, carborundum 28%, nickel dioxide 7%, quartz sand 14%, waterglass 34.7%, presses mentioned component and content (not hydrated glass) and mixes back ball milling 200
#, add waterglass again and mix together.
The composition of anti stick coating and content thereof are: F-4 dispersion liquid 49.1%, F-46 dispersion liquid 11.4%, zinc oxide 6.55%, titanium dioxide 3.3%, mica powder 2.4%, O～P solvent 1.33%, tributyl phosphate 0.4%, white clay 0.66%, carbon black 0.09%, distilled water 25.1%, during preparation, be that 50% F-46 dispersion liquid is poured in the container of square position, place temperature to be no more than in 120 ℃ the baking oven again amount of solid content, be aided with blower fan and quicken water evaporates, F-46 after the oven dry places the grinding in ball grinder powdering, after 120 mesh sieves, by filling a prescription F-46, pigment, dispersion liquids etc. add in the ball milling magnetic cylinder, and add water and become the thickness body that slightly to flow, put into the magnetic ball, ground 36 hours, in ground slurry, add the F-46 dispersion liquid by prescription, stirring and evenly mixing anti stick coating.
Get 10 in the present embodiment, L
2Aluminum pipe is made the sleeve pipe of electrothermal tube, through cut a pipe deburring, alignment, spraying, pigging, around the processing of heating wire, riveting silk, combined oxidation magnesium powder, technical processs such as dress powder, the draw, shaping, sealing, the electrothermal tube two ends be connected base 6 riveted joint after, the inorganic fluid sealant of the intra-bladder instillation of leaving a blank in two ends of pipe seals; First work step that the spraying anti stick is coated with material process is that the greasy dirt of bushing outer surface is cleaned up, and second work step is done blasting treatment, sand removal after the sandblast, and the 3rd work step spraying anti stick coating uses spray gun with 20～40N/cm
2Pressure coating is sprayed on bushing outer surface, sleeve pipe after will spraying is well then put into 60～80 ℃ of drying in oven immediately, the 4th work step is the sleeve pipe after the oven dry to be put into 360～380 ℃ high temperature oven sintering 15 minutes, make anti stick coating slightly soluble film forming, the 5th work step takes out sleeve pipe from high temperature oven, put into water rapidly and cool off,, increase the fineness of outer surface then to surface grinding process a little.
Claims (6)
1, a kind of high insulating anti-cementation electrothermal tube, form by sleeve pipe, heating wire, insulation charges, binding post, plastic core, connection base and base cover etc., its profile is for cultrating, it is characterized in that: the insulant of filling is a combined oxidation magnesium powder in the sleeve pipe, the sleeve pipe two ends adopts inorganic fluid sealant sealing, outer tube surface spraying avirulence anti stick coating.
2, electrothermal tube according to claim 1, it is characterized in that: the composition and the content thereof of described combined oxidation magnesium powder are: magnesia powder 78～80%, boron carbide 11～13%, boron oxide 5～7%, calcium oxide 2～4% is crossed 60～120 mesh sieves to above-mentioned magnesia powder, deironing, oven dry are anhydrated behind the branch, add boron carbide, boron oxide, calcium oxide again, mix, stirring promptly is combined oxidation magnesium powder.
3, combined oxidation magnesium powder according to claim 2 is characterized in that: the composition of magnesia powder and content are magnesium oxide 95～96%, silica 1 .3～3%, alundum (Al 1～2%, titanium dioxide three-iron 0.3～0.4%, calcium oxide 0.8～1.5%.
4, electrothermal tube according to claim 1 is characterized in that: inorganic fluid sealant composition and content are titanium dioxide 15～18%, carborundum 26～30%, nickel dioxide 6～8%, quartz sand 13～15%, waterglass 32～36% mixes the back ball milling with above-mentioned composition except that waterglass and reaches 200
#, add the waterglass stirring again and form inorganic fluid sealant.
5, electrothermal tube according to claim 1, it is characterized in that: the composition of anti stick coating and content are: F-4 dispersion liquid 48.5～49.5%, F-46 dispersion liquid 11～12%, zinc oxide 6～7%, titanium dioxide 2.5～3.5%, mica powder 2.2～2.6%, O～P solvent 1.2～1.5%, tributyl phosphate 0.9～1.1%, white clay 0.6～0.7%, carbon black 0.08～0.11%, distilled water 24.5～25.5% is in the container of packing into behind the above-mentioned raw materials ball milling.
6, a kind of processing step of making the described electrothermal tube of claim 1, comprise shell heat treatment, dress powder, the draw, die, shaping, sealing, assembling, test, spraying etc., it is characterized in that: in the spray paint operation, the first step is that the greasy dirt of bushing outer surface is cleaned up, second step was done blasting treatment, sand removal after the sandblast, the 3rd step spraying anti stick coating is with 20～40N/cm
2Pressure coating is sprayed on bushing outer surface, electrothermal tube after will spraying is well then put into 60～80 ℃ of drying in oven immediately, electrothermal tube after the oven dry of the 4th step is put into 360～380 ℃ high-temperature cabinet sintering, make anti stick coating slightly soluble film forming, general persistence 15～20 minutes, the 5th step took out sleeve pipe and puts into water rapidly and cool off from high-temperature cabinet, after polishing a little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93100726A CN1056029C (en) | 1993-01-07 | 1993-01-07 | High insulating anti-cementation electrothermal tube and its manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93100726A CN1056029C (en) | 1993-01-07 | 1993-01-07 | High insulating anti-cementation electrothermal tube and its manufacturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1083654A true CN1083654A (en) | 1994-03-09 |
| CN1056029C CN1056029C (en) | 2000-08-30 |
Family
ID=4983190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93100726A Expired - Fee Related CN1056029C (en) | 1993-01-07 | 1993-01-07 | High insulating anti-cementation electrothermal tube and its manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056029C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387016A (en) * | 2002-04-02 | 2002-12-25 | 上海交通大学 | Heater coated with non-crystal viscose glass enamel |
| CN102254652A (en) * | 2011-04-20 | 2011-11-23 | 荆巍 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
| CN104057248A (en) * | 2014-05-31 | 2014-09-24 | 安徽省宁国市天成科技发展有限公司 | New process for producing heating tube for washing machine |
| CN106673586A (en) * | 2016-12-14 | 2017-05-17 | 中国燃气涡轮研究院 | High-temperature-resistant filling glue for packaging temperature-measuring crystal |
| CN109379791A (en) * | 2018-10-29 | 2019-02-22 | 安徽苏立科技股份有限公司 | A kind of electric heating pipe processing technique |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87208496U (en) * | 1987-05-24 | 1988-04-06 | 罗响 | Long life electric heater |
| CN1019256B (en) * | 1990-12-10 | 1992-11-25 | 杜晟伟 | Electrothermal tube mfg. method |
-
1993
- 1993-01-07 CN CN93100726A patent/CN1056029C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387016A (en) * | 2002-04-02 | 2002-12-25 | 上海交通大学 | Heater coated with non-crystal viscose glass enamel |
| CN102254652A (en) * | 2011-04-20 | 2011-11-23 | 荆巍 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
| CN102254652B (en) * | 2011-04-20 | 2013-12-11 | 大石桥市美尔镁制品有限公司 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
| CN104057248A (en) * | 2014-05-31 | 2014-09-24 | 安徽省宁国市天成科技发展有限公司 | New process for producing heating tube for washing machine |
| CN106673586A (en) * | 2016-12-14 | 2017-05-17 | 中国燃气涡轮研究院 | High-temperature-resistant filling glue for packaging temperature-measuring crystal |
| CN109379791A (en) * | 2018-10-29 | 2019-02-22 | 安徽苏立科技股份有限公司 | A kind of electric heating pipe processing technique |
| CN109379791B (en) * | 2018-10-29 | 2022-06-17 | 安徽苏立科技股份有限公司 | Electric heating tube machining process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1056029C (en) | 2000-08-30 |
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Free format text: CORRECT: PATENTEE; FROM: HARBIN CITY RONGHUA HOUSEHOLD APPLIANCES FACTORY TO: GAO SHUHUAI |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Gao Shuhuai Patentee before: Ronghua Household Electric Appliances Factory, Harbin City |
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