CN107071947B - Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head - Google Patents
Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head Download PDFInfo
- Publication number
- CN107071947B CN107071947B CN201710445805.0A CN201710445805A CN107071947B CN 107071947 B CN107071947 B CN 107071947B CN 201710445805 A CN201710445805 A CN 201710445805A CN 107071947 B CN107071947 B CN 107071947B
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- hinge
- cable
- seal head
- installing
- sealing head
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
An electromagnetic induction heating method for build-up welding of the inner wall of a large-scale seal head is characterized by comprising the steps of installing a hanging heat insulation blanket, splicing two fan-shaped heat insulation blankets on the outer surface of the seal head, and connecting the two heat insulation blankets into a whole by using a silk ribbon; a hinge fixing ring is arranged, and a circular hinge fixing ring formed by two semi-rings is arranged on the end socket boss; installing a hinge tension bolt, and installing a plurality of bolts and adjusting nuts on the deformation-preventing ring of the seal head; the hinge is installed, one end of the hinge is connected with the adjusting nut, the other end of the hinge is provided with the hinge lock catch, the hinge lock catch is connected with the fixing ring, and the adjusting nut is adjusted to tighten the hinge; and laying an induction cable, starting from the top of the sealing head, encircling the cable around the periphery of the sealing head, embedding the cable into the hinge for fixing, and communicating the upper end socket and the lower end socket of the cable with a power supply for heating. The device solves the problem of low heat conversion rate by natural gas heating and resistance heating, and is particularly suitable for surfacing heating of the inner wall of a large-scale seal head.
Description
Technical Field
The invention relates to the technical field of electromagnetic induction heating, in particular to a method for performing heating treatment on the inner wall of a large-scale seal head by utilizing electromagnetic induction in the process of overlaying the seal head.
Background
In the inner wall surfacing process and before and after welding, the large-sized sealing head needs to be subjected to heating treatment such as preheating, post-heating and the like, and the traditional method comprises two types of natural gas heating and resistance heating. The natural gas is heated, namely, the natural gas is combusted by using a gas tool to heat the outer surface of the seal head, the heat conversion efficiency is only about 40%, and serious potential safety hazards exist in open fire operation. Resistance heating, namely, the resistance wire is wound on the inner surface and the outer surface of a workpiece, the workpiece is heated and conducted through the resistance wire, the heat conversion efficiency of the resistance wire is only about 50%, and the resistance heating device is easy to age, short in service life and high in production cost.
Disclosure of Invention
The invention discloses a heat treatment method for a large-sized sealing head by utilizing electromagnetic induction heating, which aims to solve the problems of low heat conversion efficiency of the conventional large-sized sealing head by heating natural gas and resistance heating.
The technical scheme of the invention is that the electromagnetic induction heating method for the build-up welding of the inner wall of the large-scale seal head is characterized by comprising the steps of hanging a heat insulation blanket, installing a hinge fixing ring, installing a hinge tension bolt, installing a hinge and paving an induction cable;
hanging the heat insulation blanket, and manufacturing two fan-shaped heat insulation blankets (two heat insulation blankets can be selected optimally or can be multiple plates, but the splicing trouble is increased) according to the appearance of the seal head, and cutting threading holes for splicing at the edge of the heat insulation blanket; arranging two heat preservation blankets outside the sealing head, connecting the two heat preservation blankets into a whole through threading holes by using silk ribbon, and winding a plurality of circles around the sealing head in the weft direction by using glass fiber belts to enable the heat preservation blankets to be attached to the surface of the sealing head; meanwhile, an independent cap sleeve is additionally arranged on the seal head connecting pipe so as to preserve heat;
the hinge fixing ring is installed, a circular hinge fixing ring (two semi-ring structures are convenient to contract and stretch) formed by two semi-rings is manufactured according to the size of the boss at the top of the seal head, and the fixing ring is buckled on the boss at the top of the seal head;
the hinge tension bolts are installed, a plurality of bolts are uniformly distributed and installed on the deformation-preventing ring at the bottom of the seal head, and the bolts are provided with adjusting nuts;
installing a hinge, connecting one end of the hinge with an adjusting nut, installing a hinge lock catch at the other end of the hinge, sequentially connecting the hinge lock catch with a fixed ring at the top of the sealing head according to corresponding positions, and then adjusting the adjusting nut to tighten the hinge so that the hinge is attached to the heat insulation blanket on the outer surface of the sealing head;
laying an induction cable, starting from the top of the sealing head, encircling the cable along the weft direction at the periphery of the sealing head, embedding the cable into the hinges one by one, fixing the cable by the hinges until the lower part of the sealing head is finished, and finally communicating the upper end socket and the lower end socket of the cable with a power supply to heat.
The technical effect of the invention is that the technical scheme can realize a large-scale seal head inner wall surfacing heating treatment method which is safe to use and extremely high in heat conversion rate. Experiments prove that the heat conversion rate of medium and high frequency electromagnetic induction heating is as high as 95%, the self heating value of the medium frequency lead used by the inductor is very small, the inductor can bear the operation in a high-temperature environment with the temperature of more than 400 ℃, the service life is long, the heating speed is high, the heating temperature is high, the induction type electromagnetic induction heating device is in non-contact heating, impurities are not easy to infiltrate into a heated sealing head, the induction type electromagnetic induction heating device is uniform in heating, the temperature can be automatically controlled, the temperature control precision is high (+ -0.5 ℃), and the temperature difference is small.
Drawings
Fig. 1 is a front view of the structure of the present invention and is a summary drawing.
Fig. 2 is a view showing a state when the blanket of the present invention is wrapped.
In the figure, 1 cable, 2 tie bolts, 3 hinges, 4 insulation blankets, 5 anti-deformation rings, 6 wind head connecting pipes, 7 fixing rings, 8 catches, 9 bosses and 10 threading holes.
Detailed Description
The invention will be further described with reference to examples of drawings.
As shown in the figure, the electromagnetic induction heating method for the build-up welding of the inner wall of the large-scale seal head comprises the following steps: hanging the thermal blanket 4, manufacturing two fan-shaped thermal blankets 4 according to the appearance of the seal head, and cutting threading holes 10 for splicing at the edge of the thermal blanket 4; arranging two heat preservation blankets 4 outside the sealing head, connecting the two heat preservation blankets into a whole through threading holes 4 by using silk ribbon, and winding a plurality of circles around the sealing head in the weft direction by using glass fiber belts to enable the heat preservation blankets 4 to be attached to the surface of the sealing head; meanwhile, an independent cap sleeve is additionally arranged on the seal head connecting pipe 6 so as to preserve heat;
the hinge fixing ring 7 is installed, a round hinge fixing ring 7 (two semi-ring structures are convenient to contract and stretch) formed by two semi-rings is manufactured according to the size of the boss at the top of the seal head, and the fixing ring 7 is buckled on the boss 9 at the top of the seal head;
the hinge tension bolts 2 are installed, a plurality of bolts 2 are uniformly distributed and installed on the deformation-preventing ring 5 at the bottom of the seal head, and adjusting nuts are assembled on the bolts 2;
installing a hinge 3, connecting one end of the hinge 3 with an adjusting nut, installing a hinge lock catch 8 at the other end, sequentially connecting the hinge lock catch 8 with a fixed ring 7 at the top of the sealing head according to corresponding positions, and then adjusting the adjusting nut to tighten the hinge 3 so that the hinge 3 is attached to the heat insulation blanket 4 at the outer surface of the sealing head;
the induction cable 1 is laid, the cable 1 is wound around the periphery of the sealing head along the weft direction from the top of the sealing head and is embedded into the hinges 3 one by one, the cable 1 is fixed by the hinges 3 until the lower part of the sealing head is finished, and finally the upper end head and the lower end head of the cable 1 are communicated with a power supply to be heated.
Claims (1)
1. An electromagnetic induction heating method for build-up welding of the inner wall of a large-scale seal head is characterized by comprising the following steps: installing a hanging heat insulation blanket, installing a hinge fixing ring, installing a hinge tension bolt, installing a hinge and paving an induction cable;
hanging the heat insulation blanket, manufacturing two fan-shaped heat insulation blankets according to the appearance of the seal head, and cutting threading holes for splicing at the edge of the heat insulation blanket; arranging two heat preservation blankets outside the sealing head, connecting the two heat preservation blankets into a whole through threading holes by using silk ribbon, and winding a plurality of circles around the sealing head in the weft direction by using glass fiber belts to enable the heat preservation blankets to be attached to the surface of the sealing head; meanwhile, an independent cap sleeve is additionally arranged on the seal head connecting pipe so as to preserve heat;
the hinge fixing ring is installed, a circular hinge fixing ring formed by two semi-rings is manufactured according to the size of the boss at the top of the seal head, and the fixing ring is buckled on the boss at the top of the seal head;
the hinge tension bolts are installed, a plurality of bolts are uniformly distributed and installed on the deformation-preventing ring at the bottom of the seal head, and the bolts are provided with adjusting nuts;
installing a hinge, connecting one end of the hinge with an adjusting nut, installing a hinge lock catch at the other end of the hinge, sequentially connecting the hinge lock catch with a fixed ring at the top of the sealing head according to corresponding positions, and then adjusting the adjusting nut to tighten the hinge so that the hinge is attached to the heat insulation blanket on the outer surface of the sealing head;
laying an induction cable, starting from the top of the sealing head, encircling the cable along the weft direction at the periphery of the sealing head, embedding the cable into the hinges one by one, fixing the cable by the hinges until the lower part of the sealing head is finished, and finally communicating the upper end socket and the lower end socket of the cable with a power supply to heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445805.0A CN107071947B (en) | 2017-06-14 | 2017-06-14 | Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445805.0A CN107071947B (en) | 2017-06-14 | 2017-06-14 | Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107071947A CN107071947A (en) | 2017-08-18 |
| CN107071947B true CN107071947B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710445805.0A Active CN107071947B (en) | 2017-06-14 | 2017-06-14 | Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110730521A (en) * | 2019-11-18 | 2020-01-24 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Nuclear power pressure vessel connecting pipe assembly welding electromagnetic induction heating device and using method thereof |
| CN112383979B (en) * | 2020-09-30 | 2022-11-08 | 哈电集团（秦皇岛）重型装备有限公司 | Medium-frequency heating device and method for special-shaped thick-wall end socket |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011019689A (en) * | 2009-07-15 | 2011-02-03 | Nakai:Kk | Electromagnetic induction heater |
| CN103533687A (en) * | 2013-10-02 | 2014-01-22 | 黑龙江宏宇电站设备有限公司 | Electromagnetic heating power supply for repair of large-sized workpiece and heating and buildup welding method thereof |
-
2017
- 2017-06-14 CN CN201710445805.0A patent/CN107071947B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011019689A (en) * | 2009-07-15 | 2011-02-03 | Nakai:Kk | Electromagnetic induction heater |
| CN103533687A (en) * | 2013-10-02 | 2014-01-22 | 黑龙江宏宇电站设备有限公司 | Electromagnetic heating power supply for repair of large-sized workpiece and heating and buildup welding method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨晓斌，杨军.用工频感应加热法拆卸和套装发电机转子护环的方法.黑龙江电力.-,2000,第-卷(第02期),全文. * |
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| CN107071947A (en) | 2017-08-18 |
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