CN102131320A - Sectional composite electric heating pipe and manufacturing method thereof - Google Patents
Sectional composite electric heating pipe and manufacturing method thereof Download PDFInfo
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- CN102131320A CN102131320A CN 201110086546 CN201110086546A CN102131320A CN 102131320 A CN102131320 A CN 102131320A CN 201110086546 CN201110086546 CN 201110086546 CN 201110086546 A CN201110086546 A CN 201110086546A CN 102131320 A CN102131320 A CN 102131320A
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Abstract
The invention belongs to an electric heating device, relating to a sectional composite electric heating pipe and a manufacturing method thereof. The sectional composite electric heating pipe comprises a pipe shell as well as an electric heating wire, a leading-off rod and a heat-conducting insulating medium which are filled in the pipe shell, wherein the pipe shell consists of a heating pipe and an extraction pipe which are connected into a whole through welding; the heating pipe and the extraction pipe are respectively made of stainless steel pipes different in nickel contents, the heating pipe is made of high-nickel stainless steel, and the extraction pipe is made of low-nickel stainless steel; and the electric heating wire and the front part of the leading-off rod are positioned in the heating pipe, and the rear section of the leading-off rod is positioned in the extraction pipe. According to the invention, the product life is ensured, the usage of high-cost materials is reduced, and the manufacturing cost is low.
Description
Technical field
The invention belongs to electric heater unit, relate to a kind of minute stage composite electric heating tube and manufacture method thereof.
Background technology
The existing electric heating tube that is used for products such as water heater, baking box, refrigerator generally includes shell and is filled in shell interior heating wire, leading-off rods and heat conductive insulating medium.Electric heating tube in use, the efficient heat generation position is the heating wire position, the body of leading-off rods position correspondence only plays a transition role, do not participate in the heating.Electric heating tube in use, heating position easily produces high-temperature oxydation, scaling or corrosion failure etc. takes place, so destroy the heating position often that lost efficacy because of tubing at first.With the water heater electrothermal tube is example, it in use, because the surface produces a large amount of bubbles during the heating position heating, cause originally being dissolved in decomposes such as calcium bicarbonate in the water, magnesium bicarbonate and become calcium carbonate and magnesium carbonate, because of calcium carbonate and the solubility of magnesium carbonate in water very little, just under the heating tube surface precipitation, and formed incrustation scale gradually.Extend because of the incrustation scale heat absorption causes heating time during the water heater heating, and, cause heater temperature to increase because the thermal conductivity of incrustation scale is very poor, many thereby also can shorten the useful life of electric heater.The body of leading-off rods position correspondence is not owing to generate heat, so scaling hardly.
And the shell master section of heating of existing electric heating tube and the section of drawing are normally by whole stainless steel material manufacturing, in order to reach (as high temperature, hard water etc.) long-term purpose of using under various rigor condition, the electric heating tube that is used to add hot water often needs to adopt high nickel and stainless steel, as Ying Gelai 800(nickel content about 35%) and Ying Gelai 840(nickel content about 25%) etc.The nickel metal is one of metal material of relatively lacking of China, and many high nickel stainless steel materials such as Ying Gelai 800 etc. need be from external imports.Life-span inhomogeneities between the different sections of existing electric heating tube has just caused the waste of wide variety of materials.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of and can guarantee life of product, can reduce the use of expensive material, the branch stage composite electric heating tube and the manufacture method thereof of low cost of manufacture again.
The stage composite electric heating tube included shell and was filled in shell interior heating wire, leading-off rods and heat conductive insulating medium in of the present invention minute, described shell is made up of heat-generating pipe and extraction tube, these two sections bodys are one by being welded to connect, heat-generating pipe is made by the different stainless steel tube of nickel content respectively with extraction tube, the material of heat-generating pipe is high nickel and stainless steel, and the material of extraction tube is a low nickel stainless steel; Described heating wire and leading portion leading-off rods are positioned at heat-generating pipe, and the back segment leading-off rods is positioned at extraction tube.
The welding connecting mode of described heat-generating pipe and extraction tube can adopt following several scheme:
First kind of scheme: described heat-generating pipe and extraction tube directly are welded to connect by end face, form complete shell.
Second kind of scheme: be provided with a pair of semicircle body between described heat-generating pipe and the extraction tube, two involutory welding of semicanal body form a complete intervalve, the two ends of two semicircle bodys are welded to connect with the end face of heat-generating pipe and extraction tube respectively, form complete shell; Described leading-off rods is made up of the leading portion leading-off rods that is welded to connect and back segment leading-off rods two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is positioned at two halves pipe body, is filled with the heat conductive insulating pellet of a pair of semicircle tubulose in the cavity between semicircle body and leading-off rods.
The third scheme: described heat-generating pipe and extraction tube respectively with the two ends socket of one section sleeve pipe, socket part is welded to connect; Described leading-off rods is made up of the leading portion leading-off rods that is welded to connect and back segment leading-off rods two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is arranged in cannula cavity, is filled with the heat conductive insulating pellet of a pair of semicircle tubulose in the cavity between sleeve pipe and leading-off rods.
For the electric heating tube of above-mentioned first kind of scheme, its manufacture method is: heat-generating pipe and extraction tube directly are welded to connect the complete shell of formation, fill heating wire, leading-off rods and heat conductive insulating medium then in the shell.
For the electric heating of above-mentioned second kind of scheme, its manufacture method is:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
In second step, the extension of leading portion leading-off rods and back segment leading-off rods is welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd step, with the involutory heat conductive insulating pellet periphery that is enclosed in of a pair of semicircle body, then between the two halves pipe body, between semicircle body and the heat-generating pipe and the seam between semicircle body and the extraction tube be welded to connect;
In the 4th step, eliminate gap between half two halves pipe body and the heat conductive insulating pellet by the oil pressure flattening method.
For the electric heating tube of above-mentioned the third scheme, its manufacture method is:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
Second step was enclosed within sleeve pipe earlier on heat-generating pipe or the extraction tube, the extension of leading portion leading-off rods and back segment leading-off rods was welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd the step, sleeve pipe is moved on to heat conductive insulating pellet periphery, and make the sleeve pipe two ends respectively with heat-generating pipe and extraction tube socket, the outside slit to socket part is welded to connect then;
The 4th step is by the gap between oil pressure flattening method elimination sleeve pipe and the heat conductive insulating pellet.
In the said method, the welding of leading-off rods part can adopt melting methods such as Laser Welding, argon arc welding to be welded to connect; The welding of shell part can adopt method for welding such as melting method such as Laser Welding or nickel-based brazing to be welded to connect.
Heating part at electric heating tube of the present invention is provided with high performance nickelic stainless steel tube material, and lower-cost low nickel stainless steel material is set at extension, make the material lifetime of different pipe sections balanced more, when not reducing the heating tube performance, reduce the consumption of high performance material, saved material cost.
Description of drawings
Fig. 1 is the electric heating tube structural representation of the embodiment of the invention one;
Fig. 2 is the electric heating tube structural representation of the embodiment of the invention two;
Fig. 3 is the local amplification view of the A of Fig. 2;
Fig. 4 is the electric heating tube structural representation of the embodiment of the invention three;
Fig. 5 is the local amplification view of the B of Fig. 4;
Fig. 6 is the cross sectional shape schematic diagram of semicircle body of the present invention;
Fig. 7 is a heat conductive insulating pellet cross sectional shape schematic diagram of the present invention.
Embodiment
As shown in the figure, the stage composite electric heating tube included shell 1 and was filled in shell interior heating wire 2, leading-off rods 3 and heat conductive insulating medium 4(such as magnesia powder in of the present invention minute), shell 1 is made up of heat-generating pipe 11 and extraction tube 12, these two sections bodys are one by being welded to connect, heat-generating pipe is made by the different stainless steel tube of nickel content respectively with extraction tube, the material of heat-generating pipe is high nickel and stainless steel (as materials such as Ying Gelai 800, Ying Gelai 840), and the material of extraction tube is low nickel stainless steel (as stainless steel 304 materials such as grade); Heating wire and leading portion leading-off rods are positioned at heat-generating pipe, and the back segment leading-off rods is positioned at extraction tube.
Embodiment one
As shown in Figure 1, heat-generating pipe and extraction tube directly are welded to connect by end face, form complete shell, and leading-off rods 3 is whole root timber material.Its manufacture method is: heat-generating pipe 11 and extraction tube 12 directly are welded to connect the complete shell of formation, fill heating wire, leading-off rods and heat conductive insulating medium then in shell.
Embodiment two
As Fig. 2, shown in Figure 3, be provided with a pair of semicircle body 5(between heat-generating pipe and the extraction tube referring to Fig. 6), the involutory welding of two semicanal bodies form a complete intervalve, and the two ends of two semicircle bodys are welded to connect with the end face of heat-generating pipe and extraction tube respectively, form complete shell; Leading-off rods 3 is made up of the leading portion leading-off rods 31 that is welded to connect and back segment leading-off rods 32 two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is positioned at two halves pipe body, the heat conductive insulating pellet 6(that is filled with a pair of semicircle tubulose in the cavity between semicircle body and leading-off rods can adopt magnesium oxide material referring to Fig. 7).
Its manufacture method is:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
In second step, the extension of leading portion leading-off rods and back segment leading-off rods is welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd step, with the involutory heat conductive insulating pellet periphery that is enclosed in of a pair of semicircle body, then between the two halves pipe body, between semicircle body and the heat-generating pipe and the seam between semicircle body and the extraction tube be welded to connect;
In the 4th step, eliminate gap between half two halves pipe body and the heat conductive insulating pellet by the oil pressure flattening method.
Embodiment three
As Fig. 4, shown in Figure 5, heat-generating pipe and extraction tube respectively with the two ends socket of one section sleeve pipe 7, socket part is welded to connect; Leading-off rods is made up of the leading portion leading-off rods 31 that is welded to connect and back segment leading-off rods 32 two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is arranged in cannula cavity, the heat conductive insulating pellet 6(that is filled with a pair of semicircle tubulose in the cavity between sleeve pipe and leading-off rods can adopt magnesium oxide material referring to Fig. 7).
Its manufacture method is:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
Second step was enclosed within sleeve pipe earlier on heat-generating pipe or the extraction tube, the extension of leading portion leading-off rods and back segment leading-off rods was welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd the step, sleeve pipe is moved on to heat conductive insulating pellet periphery, and make the sleeve pipe two ends respectively with heat-generating pipe and extraction tube socket, the outside slit to socket part is welded to connect then;
The 4th step is by the gap between oil pressure flattening method elimination sleeve pipe and the heat conductive insulating pellet.
Claims (9)
1. branch stage composite electric heating tube, include shell (1) and be filled in shell interior heating wire (2), leading-off rods (3) and heat conductive insulating medium (4), it is characterized in that: shell (1) is made up of heat-generating pipe (11) and extraction tube (12), these two sections bodys are one by being welded to connect, heat-generating pipe is made by the different stainless steel tube of nickel content respectively with extraction tube, the material of heat-generating pipe is high nickel and stainless steel, and the material of extraction tube is a low nickel stainless steel; Heating wire and leading portion leading-off rods are positioned at heat-generating pipe, and the back segment leading-off rods is positioned at extraction tube.
2. according to claim 1 minute stage composite electric heating tube is characterized in that: heat-generating pipe (11) and extraction tube (12) directly are welded to connect by end face, form complete shell.
3. according to claim 1 minute stage composite electric heating tube, it is characterized in that: be provided with a pair of semicircle body (5) between heat-generating pipe (11) and the extraction tube (12), two involutory welding of semicanal body form a complete intervalve, the two ends of two semicircle bodys are welded to connect with the end face of heat-generating pipe and extraction tube respectively, form complete shell; Leading-off rods (3) is made up of the leading portion leading-off rods (31) that is welded to connect and back segment leading-off rods (32) two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is positioned at two halves pipe body, is filled with the heat conductive insulating pellet (6) of a pair of semicircle tubulose in the cavity between semicircle body and leading-off rods.
4. according to claim 1 minute stage composite electric heating tube is characterized in that: heat-generating pipe (11) and extraction tube (12) respectively with the two ends socket of one section sleeve pipe (7), socket part is welded to connect; Leading-off rods (3) is made up of the leading portion leading-off rods (31) that is welded to connect and back segment leading-off rods (32) two parts, the welding portion of leading portion leading-off rods and back segment leading-off rods is arranged in cannula cavity, is filled with the heat conductive insulating pellet (6) of a pair of semicircle tubulose in the cavity between sleeve pipe and leading-off rods.
5. the manufacture method of described minute stage composite electric heating tube of a claim 2 is characterized in that: heat-generating pipe 11 and extraction tube 12 directly are welded to connect the complete shell of formation, fill heating wire, leading-off rods and heat conductive insulating medium then in shell.
6. the manufacture method of described minute stage composite electric heating tube of a claim 3 is characterized in that:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
In second step, the extension of leading portion leading-off rods and back segment leading-off rods is welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd step, with the involutory heat conductive insulating pellet periphery that is enclosed in of a pair of semicircle body, then between the two halves pipe body, between semicircle body and the heat-generating pipe and the seam between semicircle body and the extraction tube be welded to connect.
7. the manufacture method of according to claim 6 minute stage composite electric heating tube is characterized in that: after the 3rd step, eliminate gap between half two halves pipe body and the heat conductive insulating pellet by the oil pressure flattening method.
8. the manufacture method of described minute stage composite electric heating tube of a claim 4 is characterized in that:
The first step is inserted heat-generating pipe with heating wire and leading portion leading-off rods, and closely knit filling heat conductive insulating medium; The back segment leading-off rods is inserted extraction tube and closely knit filling heat conductive insulating medium;
Second step was enclosed within sleeve pipe earlier on heat-generating pipe or the extraction tube, the extension of leading portion leading-off rods and back segment leading-off rods was welded to connect, then with the involutory extension periphery that is enclosed in leading portion leading-off rods and back segment leading-off rods of the heat conductive insulating pellet of a pair of semicircle tubulose;
The 3rd the step, sleeve pipe is moved on to heat conductive insulating pellet periphery, and make the sleeve pipe two ends respectively with heat-generating pipe and extraction tube socket, the outside slit to socket part is welded to connect then.
9. the manufacture method of according to claim 8 minute stage composite electric heating tube is characterized in that: after the 3rd step, eliminate gap between half two halves pipe body and the heat conductive insulating pellet by the oil pressure flattening method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110086546 CN102131320A (en) | 2011-04-07 | 2011-04-07 | Sectional composite electric heating pipe and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110086546 CN102131320A (en) | 2011-04-07 | 2011-04-07 | Sectional composite electric heating pipe and manufacturing method thereof |
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| CN102131320A true CN102131320A (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110086546 Pending CN102131320A (en) | 2011-04-07 | 2011-04-07 | Sectional composite electric heating pipe and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721181A (en) * | 2012-06-27 | 2012-10-10 | 安徽好来西科技有限公司 | Heating pipe of instant electric water heater |
| CN103096527A (en) * | 2011-10-27 | 2013-05-08 | 清华大学 | Electrical heating rod device |
| 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 |
| CN106028480A (en) * | 2016-05-31 | 2016-10-12 | 中山浩发节能科技有限公司 | High-efficiency, energy-saving and safe heating tube |
| CN108562100A (en) * | 2017-12-31 | 2018-09-21 | 安徽省宁国天成电工有限公司 | A kind of refrigerator heat-generating pipe |
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| CN2412344Y (en) * | 1999-11-28 | 2000-12-27 | 侯志坚 | Short straight tube detatchable titanium heater |
| CN2903884Y (en) * | 2006-05-25 | 2007-05-23 | 南京赫特节能环保有限公司 | Metal composite pipe heat pipe |
| CN201260249Y (en) * | 2008-07-21 | 2009-06-17 | 杨智慧 | Composite electric heating tube |
| CN202085331U (en) * | 2011-04-07 | 2011-12-21 | 镇江东方电热科技股份有限公司 | Segment combined type electric heating tube |
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2011
- 2011-04-07 CN CN 201110086546 patent/CN102131320A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2412344Y (en) * | 1999-11-28 | 2000-12-27 | 侯志坚 | Short straight tube detatchable titanium heater |
| CN2903884Y (en) * | 2006-05-25 | 2007-05-23 | 南京赫特节能环保有限公司 | Metal composite pipe heat pipe |
| CN201260249Y (en) * | 2008-07-21 | 2009-06-17 | 杨智慧 | Composite electric heating tube |
| CN202085331U (en) * | 2011-04-07 | 2011-12-21 | 镇江东方电热科技股份有限公司 | Segment combined type electric heating tube |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103096527A (en) * | 2011-10-27 | 2013-05-08 | 清华大学 | Electrical heating rod device |
| CN103096527B (en) * | 2011-10-27 | 2015-07-15 | 清华大学 | Electrical heating rod device |
| CN102721181A (en) * | 2012-06-27 | 2012-10-10 | 安徽好来西科技有限公司 | Heating pipe of instant electric water heater |
| 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 |
| CN106028480A (en) * | 2016-05-31 | 2016-10-12 | 中山浩发节能科技有限公司 | High-efficiency, energy-saving and safe heating tube |
| CN108562100A (en) * | 2017-12-31 | 2018-09-21 | 安徽省宁国天成电工有限公司 | A kind of refrigerator heat-generating pipe |
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Application publication date: 20110720 |