CN202428125U - Heating device for butt welding of steel tubes - Google Patents
Heating device for butt welding of steel tubes Download PDFInfo
- Publication number
- CN202428125U CN202428125U CN2011205341305U CN201120534130U CN202428125U CN 202428125 U CN202428125 U CN 202428125U CN 2011205341305 U CN2011205341305 U CN 2011205341305U CN 201120534130 U CN201120534130 U CN 201120534130U CN 202428125 U CN202428125 U CN 202428125U
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- Prior art keywords
- heating device
- heater
- wall
- butt welding
- cylinder
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Abstract
The utility model relates to a heating device, and in particular relates to a heating device for butt welding of steel tubes. The heating device comprises electric heaters and a support used for fixing the electric heater. The heating device is characterized in that the support is a cylinder composed of two cylindrical bodies the sections of which are semicircles; a supporting tube is arranged between the two cylindrical bodies the sections of which are semicircles; an insulating layer coats the excircle surface of the support; and the electric heaters are uniformly distributed on the excircle surface of the insulating layer. The heating device disclosed by the utility model has the characteristics that 1, a manner that heating is carried out through an inner pipeline wall complementary with an outer pipeline wall is adopted, thus the temperature difference between the inner wall of a pipeline and the outer wall of the pipeline can be controlled to be 10-15 DEG C, and the problems that tempering on the tissue in a weld zone is insufficient as the temperature difference between the inner wall and the outer wall is too big and mechanical performances are reduced are solved; and 2, the heating device disclosed by the utility model is reasonable in structure and convenient to use and can be enlarged and reduced according to the size of the inside diameters of the steel tubes, thus heating requirements for different pipe diameters can be met.
Description
Technical field
The utility model relates to a kind of heater, particularly the heater of steel pipe butt welding.
Background technology
At present, along with fast development overcritical, the ultra supercritical generating set, develop to the high parameter direction sound assurance is provided and the development and utilization of new material is the power station.P92 and T92 steel are the abbreviations of SA335-P92 and SA213-T92 steel; P92/ T92 steel is vanadium, niobium element microalloying and controls boron and the ferritic steel of nitrogen element content; Have higher elevated temperature strength and croop property than other ferritic alloyed steel; Become the pressure-containing member important in overcritical at present, the ultra supercritical generating set such as the main material of super-heater exit case, main steam line etc.; And pipeline wall thickness increases considerably, and thickness increases greater than the pipeline of 110mm gradually, the thickest 150mm that reached.Along with the increase of pipeline wall thickness, the welding of weld bond and the heat treatment requirements after the welding have been proposed very high requirement, can not satisfy the demand according to conventional welding procedure.Because weld seam is the cast structure that cools down from the very high molten condition of temperature; The crystal grain of weld metal can not get refinement; Micro alloying elements such as Nb also melt in matrix admittedly; Have no chance fully to separate out, cause the weld seam of P92/ T92 steel to become link overcritical, that ultra supercritical unit operation safety is the weakest.The weld strength that how to solve P92/ T92 steel becomes one of overcritical, that the ultra supercritical fired power generating unit develops bottleneck.
Summary of the invention
The purpose of the utility model is the defective that overcomes prior art, when providing a kind of two steel pipes to carry out butt welding, can heat the heater with the steel pipe butt welding of satisfying welding requirements to steel pipe.
For realizing above-mentioned purpose; The technical scheme of the utility model is: a kind of heater of steel pipe butt welding; Comprising electric heater and be used for fixing the support of electric heater, it is characterized in that above-mentioned support is the cylinder that the cylinder of semicircular ring is formed by two sections, is between the cylinder of semicircular ring stay pipe to be installed in two sections; On the support periphery, be enclosed with insulating barrier, on the periphery of insulating barrier, be evenly equipped with electric heater.
Above-mentioned cross section is that the arc surface in the cylinder of semicircular ring is made up of two arc surfaces overlap joint, connects that flat board is to be formed by two dull and stereotyped overlap joints between the arc surface of above-mentioned two overlap joints, and the flat board that the arc surface of two overlap joints and two overlaps passes through bolt.
An end that in above-mentioned stay pipe and cross section is the cylinder of semicircular ring is equipped with pull rope.
Above-mentioned electric heater is a ceramic heater.
The utlity model has following characteristics: 1, owing to adopt the inner-walls of duct heating; Be aided with the outer wall mode of heating; But the control valve road inside and outside wall temperature difference is 10-15 ℃ of scope, and it is excessive and weld metal zone that cause organizes tempering insufficient, the problem that mechanical performance descends to have solved the inside and outside wall temperature difference., this heater is rational in infrastructure, easy to use, and can amplify and dwindles according to the pipe diameter size, need applicable to the heating of different tube diameters.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Accompanying drawing 2 is the A-A cutaway view of the utility model accompanying drawing 1.
The specific embodiment
Heater is like Fig. 1, shown in 2; Support 5 is the cylinder that the cylinder of semicircular ring is formed by two sections; Be between the cylinder of semicircular ring stay pipe 6 to be installed in two sections, on support 5 peripheries, be enclosed with insulating barrier 4, on the periphery of insulating barrier, be evenly equipped with electric heater 3.The purpose one that adds insulating barrier is with electric heater 3 and support 5 insulation.Electric heater can adopt existing ceramic heater.After accomplishing for the ease of welding this heater being taken out, is that the right-hand member of the cylinder of semicircular ring is equipped with pull rope 9 in stay pipe and cross section.
Above-mentioned cross section is that the arc surface in the cylinder of semicircular ring is made up of two arc surfaces overlap joint, connects that flat board is to be formed by two dull and stereotyped overlap joints between the arc surface of above-mentioned two overlap joints, and the flat board of the arc surface of two overlap joints and two overlap joints is fixed through bolt 1.
Before pipeline 2 counterparts, earlier according to the column diameter of diameter of steel tube adjustment semicircular ring, method of adjustment is that the bolt with two arc surface lap-joints and two dull and stereotyped lap-joints unclamps, and is moved to the left circular arc faying surface and dull and stereotyped faying surface, to suitable dimension, bolts on.About Lower Half in the mouth of pipe of two butt welding place heater the latter half respectively; On Lower Half pipeline heater, place two round stay pipes 6 then; After heater the first half is placed on conduit upper; And guarantee ceramic heater and inner-walls of duct applying closely, gap＜2mm.About distance between two heaters and the welding region remain on about 50mm, heater is burnt out when preventing to weld.Adopt metal bracelet 7 that two parts about the inwall heater branch of both sides, weld bond district are coupled together then, it is whole to form a heating.Heater lead-out wire 8 quick plugs are connected with external power source, can carry out heating work.Welding utilizes the pull rope 9 on right side that heater is taken out after accomplishing.
Claims (4)
1. the heater of a steel pipe butt welding; Comprise electric heater and the support that is used for fixing electric heater; It is characterized in that above-mentioned support (5) is the cylinder that the cylinder of semicircular ring is formed by two sections; Be between the cylinder of semicircular ring stay pipe (6) to be installed in two sections, on support (5) periphery, be enclosed with insulating barrier (4), on the periphery of insulating barrier, be evenly equipped with electric heater (3).
2. the heater of steel pipe butt welding according to claim 1; It is characterized in that above-mentioned cross section is that arc surface in the cylinder of semicircular ring is made up of two arc surfaces overlap joint; Connect that flat board is to be formed by two dull and stereotyped overlap joints between the arc surface of above-mentioned two overlap joints, the flat board of the arc surface of two overlap joints and two overlap joints is fixing through bolt (1).
3. the heater of steel pipe butt welding according to claim 2 is characterized in that in above-mentioned stay pipe (6) and cross section being that an end of the cylinder of semicircular ring is equipped with pull rope (9).
4. the heater of steel pipe butt welding according to claim 3 is characterized in that above-mentioned electric heater (3) is a ceramic heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205341305U CN202428125U (en) | 2011-12-20 | 2011-12-20 | Heating device for butt welding of steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205341305U CN202428125U (en) | 2011-12-20 | 2011-12-20 | Heating device for butt welding of steel tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202428125U true CN202428125U (en) | 2012-09-12 |
Family
ID=46777598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205341305U Withdrawn - After Issue CN202428125U (en) | 2011-12-20 | 2011-12-20 | Heating device for butt welding of steel tubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202428125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601552A (en) * | 2011-12-20 | 2012-07-25 | 宁夏电力建设工程公司 | Heater for butt-welding steel tubes |
-
2011
- 2011-12-20 CN CN2011205341305U patent/CN202428125U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601552A (en) * | 2011-12-20 | 2012-07-25 | 宁夏电力建设工程公司 | Heater for butt-welding steel tubes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120912 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |