CN213772151U - Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler - Google Patents
Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler Download PDFInfo
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- CN213772151U CN213772151U CN202022933571.4U CN202022933571U CN213772151U CN 213772151 U CN213772151 U CN 213772151U CN 202022933571 U CN202022933571 U CN 202022933571U CN 213772151 U CN213772151 U CN 213772151U
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Abstract
The utility model discloses an ultra-supercritical power station boiler heating surface tube bank postweld heat treatment medium frequency induction heater, which comprises an upper piece heater A and an upper piece heater B, wherein the upper piece heater A and a lower piece heater B both comprise electrified conductors, the electrified conductors are N copper strips distributed at equal intervals, the number of N is matched with the length of the boiler heating surface tube bank, copper wire noses are fixedly arranged at both ends of each electrified conductor, and connecting through holes are arranged on the copper wire noses; one side of the upper heater A and one side of the lower heater B are connected through bolts, and the other sides of the upper heater A and the lower heater B are connected through leads to form a series passage. The utility model provides a many problems of postweld thermal treatment in the on-the-spot composite mounting of traditional boiler heating surface bank of tubes, when guaranteeing welded joint heat treatment effect quality, improved staff's work efficiency, reduced staff intensity of labour, saved insulation material, reduced insulation material and to the pollution of environment, had very high practical value.
Description
The technical field is as follows:
the utility model relates to an ultra supercritical power station boiler heating surface bank of tubes welds the postweld thermal treatment, in particular to ultra supercritical power station boiler heating surface bank of tubes welds postweld thermal treatment intermediate frequency induction heater.
Background art:
with the continuous increase of the design temperature and the design pressure of the utility boiler, a large number of low-alloy heat-resistant steel and high-alloy heat-resistant steel pipelines such as 12Co1MoV, 15CrMo, T23, T91 and the like are widely used in a boiler heating surface tube bank in an ultra-supercritical power station boiler. As the parameters of the machine set are increased, the welding heat treatment process, equipment, a method and the like are greatly challenged.
At present, in the field combined installation process of a tube bank on a heating surface of a power station boiler, the problems of difficult arrangement of a post-welding heat treatment heating sheet, low temperature rise speed, high labor intensity of workers, low working efficiency and the like generally exist.
The utility model has the following contents:
the utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, and the medium-frequency induction heater for the heat treatment after the tube array welding of the heating surface of the ultra-supercritical power station boiler is provided.
The utility model discloses a technical scheme who solves technical problem and take is:
a medium-frequency induction heater for post-welding heat treatment of a heating surface tube bank of an ultra-supercritical power station boiler comprises an upper piece heater A and an upper piece heater B, wherein the upper piece heater A and the lower piece heater B both comprise electrified conductors, the electrified conductors are N copper strips distributed at equal intervals, the number of the N copper strips is matched with the length of the heating surface tube bank of the boiler, copper wire noses are fixedly arranged at two ends of each electrified conductor, and connecting through holes are formed in the copper wire noses; one side of the upper heater A and one side of the lower heater B are connected through bolts, and the other sides of the upper heater A and the lower heater B are connected through leads to form a series passage.
The external surface of the electrified conductor is wrapped by a heat-insulating layer, the heat-insulating layer is formed by bonding a asbestos cloth layer, an alumina layer and an aluminum dihydrogen phosphate layer from inside to outside in sequence, and the thickness ratio of the asbestos cloth layer to the alumina layer to the aluminum dihydrogen phosphate layer is 1:1: 1; the thickness of the heat insulation layer is three times or more than three times of the thickness of the electrified conductor.
In order to avoid high-temperature oxidation, the surface of the copper wire nose is plated with a Ni-P alloy layer.
When the same side ends of the upper heater A and the lower heater B are connected through a lead, the first electrified conductor A1 of the upper heater A is connected with the second electrified conductor B2 of the lower heater B through a lead, the second electrified conductor A2 of the upper heater A is connected with the third electrified conductor B3 of the lower heater B through a lead, the third electrified conductor A3 of the upper heater A is connected with the fourth electrified conductor B4 of the lower heater B through a lead, by analogy, the Nth-1 current-carrying conductor AN-1 of the upper heater A and the Nth current-carrying conductor BN of the lower heater B are connected through a lead, and finally the Nth current-carrying conductor AN of the upper heater A and the 1 st current-carrying conductor B1 of the lower heater B which are not connected are connected with a medium-frequency induction heating power supply to form a series circuit, so that the heating surface tube bank of the boiler can be heated or insulated after being electrified.
The utility model discloses an actively beneficial effect is:
the utility model discloses use the heater that medium frequency induction heating principle preparation formed, two heaters distribute in boiler heating surface bank of tubes both sides during the use, fill insulation material with the space department that forms between the boiler heating surface bank of tubes to with two heaters and the fixed close laminating of boiler heating surface bank of tubes together, pass through the wire with the copper nose at heater both ends afterwards and connect formation series circuit, and be connected with medium frequency induction heating power. Convenient to use, easy operation has improved the work efficiency of postweld thermal treatment, has reduced staff's intensity of labour, has very high practical value, easily promotes.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1 (without the addition of bolts);
FIG. 3 is a schematic explanatory view of the connection of one side of the upper and lower heaters by a lead wire.
The specific implementation mode is as follows:
the invention will be further explained and explained with reference to the drawings and the embodiments:
referring to fig. 1, 2 and 3, the intermediate frequency induction heater for the tube bundle postweld heat treatment of the heating surface of the ultra-supercritical power station boiler comprises an upper piece heater A and an upper piece heater B, wherein the upper piece heater A and the lower piece heater B both comprise electrified conductors 3, the electrified conductors 3 are 5 copper strips distributed at equal intervals, two ends of each electrified conductor are fixedly provided with copper wire noses 1, and the copper wire noses 1 are provided with connecting through holes 2; one sides of the upper heater A and the lower heater B are connected through the connecting through hole 2 by a bolt 6, and the other sides are connected by a lead wire to form a series circuit.
The outside of the electrified conductor 3 is wrapped with a heat-insulating layer 4, the heat-insulating layer 4 is formed by sequentially bonding a asbestos cloth layer, an aluminum oxide layer and a dihydrogen aluminum phosphate layer from inside to outside, and the thickness ratio of the asbestos cloth layer to the aluminum oxide layer to the dihydrogen aluminum phosphate layer is 1:1: 1; the thickness of the insulating layer 4 is three times that of the current-carrying conductor 3.
In order to avoid high-temperature oxidation, a Ni-P alloy layer is plated on the surface of the copper nose 1.
When the same side ends of the upper heater A and the lower heater B are connected through a lead, a first electrified conductor A1 of the upper heater A is connected with a second electrified conductor B2 of the lower heater B through a lead, a second electrified conductor A2 of the upper heater A is connected with a third electrified conductor B3 of the lower heater B through a lead, a third electrified conductor A3 of the upper heater A is connected with a fourth electrified conductor B4 of the lower heater B through a lead, a4 th electrified conductor A4 of the upper heater A is connected with a5 th electrified conductor B5 of the lower heater B through a lead, and finally, the 5 th electrified conductor A5 of the upper heater A and the 1 st electrified conductor B1 of the lower heater B which are not connected are connected with a medium-frequency induction heating power supply to form a series circuit, so that the heating surface tube bank of the boiler can be heated or insulated after being electrified.
The utility model provides a traditional boiler heating surface tube bank weld after heat treatment, heating plate arrange the problem that difficulty, workman intensity of labour are big, work efficiency is lower, can guarantee boiler heating surface tube bank weld after heat treatment's quality to improve work efficiency, reduce staff intensity of labour.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides an ultra supercritical power station boiler heating surface tube bank postweld heat treatment intermediate frequency induction heater, includes upper segment heater A and upper segment heater B, its characterized in that: the upper heater A and the lower heater B both comprise electrified conductors (3), the electrified conductors (3) are N copper strips distributed at equal intervals, the number of N copper strips is matched with the length of a tube bank (5) of a heating surface of the boiler, two ends of each electrified conductor (3) are fixedly provided with copper wire noses (1), and the copper wire noses (1) are provided with connecting through holes (2); one side of the upper heater A and one side of the lower heater B are connected through the connecting through hole (2) by a bolt (6), and the other side of the upper heater A and the lower heater B are connected by a lead to form a series circuit.
2. The ultra-supercritical power station boiler heating surface tube array postweld heat treatment medium-frequency induction heater of claim 1, characterized in that: the power-on conductor is characterized in that a layer of insulating layer (4) wraps the outside of the power-on conductor (3), and the thickness of the insulating layer (4) is three times or more than three times that of the power-on conductor (3).
3. The ultra-supercritical power station boiler heating surface tube array postweld heat treatment medium-frequency induction heater of claim 1, characterized in that: the surface of the copper wire nose (1) is plated with a Ni-P alloy layer.
4. The ultra-supercritical power station boiler heating surface tube array postweld heat treatment medium-frequency induction heater of claim 1, characterized in that: when the same side ends of the upper heater A and the lower heater B are connected through a lead, the first electrified conductor A1 of the upper heater A is connected with the second electrified conductor B2 of the lower heater B through a lead, the second electrified conductor A2 of the upper heater A is connected with the third electrified conductor B3 of the lower heater B through a lead, the third electrified conductor A3 of the upper heater A is connected with the fourth electrified conductor B4 of the lower heater B through a lead, by analogy, the Nth-1 current-carrying conductor AN-1 of the upper heater A and the Nth current-carrying conductor BN of the lower heater B are connected through a lead, and finally the Nth current-carrying conductor AN of the upper heater A and the 1 st current-carrying conductor B1 of the lower heater B which are not connected are connected with a medium-frequency induction heating power supply to form a series circuit, so that the heating surface tube bank of the boiler can be heated or insulated after being electrified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022933571.4U CN213772151U (en) | 2020-12-09 | 2020-12-09 | Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022933571.4U CN213772151U (en) | 2020-12-09 | 2020-12-09 | Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler |
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| CN213772151U true CN213772151U (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359200A (en) * | 2020-12-09 | 2021-02-12 | 中国电建集团河南工程有限公司 | Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359200A (en) * | 2020-12-09 | 2021-02-12 | 中国电建集团河南工程有限公司 | Intermediate frequency induction heater for post-welding heat treatment of tube rows on heating surface of ultra-supercritical power station boiler |
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