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Induction heating device in steel pipe and heating method with induction heating device

An induction heating device and built-in heating technology are applied in the field of steel pipe heating to achieve the effects of convenient equipment installation, less oxidation and low investment

Pending Publication Date: 2019-07-23
XUANHUA ZHONGDA ANTI CORROSION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This device mainly solves the problem of using medium frequency induction coils to heat large-diameter steel pipes with external stiffening rings; this device uses coils built into steel pipes to improve energy consumption utilization and temperature uniformity.

Method used

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  • Induction heating device in steel pipe and heating method with induction heating device
  • Induction heating device in steel pipe and heating method with induction heating device
  • Induction heating device in steel pipe and heating method with induction heating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Place the steel pipe with a diameter of 630mm on the transfer trolley to measure the center height of the steel pipe, then place the medium frequency induction coil on the cantilever, adjust the height of the cantilever to keep the coil and the steel pipe at the same center height and ensure the gap between the coil and the steel pipe Evenly, connect the coil and the intermediate frequency equipment with water cables, after the intermediate frequency equipment is powered on and watered;

[0043] 2) Start the intermediate frequency heating equipment. After the steel pipe is heated, the temperature is 200 ℃ ~ 220 ℃, the time is 25 minutes, the intermediate frequency voltage is 260V, and the DC current is 380A;

[0044] 3) Adjust the roller spacing of the transfer trolley to 450mm, the steel pipe speed to 20r / min, and the travel speed of the transfer trolley to 480mm / min;

[0045] 4) The tube transfer trolley moves forward evenly at the set speed, and starts to heat the...

Embodiment 2

[0047] 1) Place the steel pipe with a diameter of 1020mm on the pipe transfer trolley to measure the center height of the steel pipe, then place the intermediate frequency induction coil on the cantilever, adjust the height of the cantilever to keep the coil and the steel pipe at the same center height and ensure the gap between the coil and the steel pipe Evenly, connect the coil and the intermediate frequency equipment with water cables, after the intermediate frequency equipment is powered on and watered;

[0048] 2) Start the intermediate frequency heating equipment. After the steel pipe is heated, the heating temperature is 200 ℃ ~ 220 ℃, the time is 30 minutes, the intermediate frequency voltage is 370V, and the DC current is 500A;

[0049] 3) Adjust the roller spacing of the transfer trolley to 670mm, the roller speed to 12r / min, and the travel speed of the transfer trolley to 400mm / min;

[0050] 4) The tube transfer trolley moves forward evenly at the set speed, and st...

Embodiment 3

[0052] 1) Place the steel pipe with a diameter of 2020mm on the transfer trolley to measure the center height of the steel pipe, then place the medium frequency induction coil on the cantilever, adjust the height of the cantilever to keep the coil and the steel pipe at the same center height and ensure the gap between the coil and the steel pipe Evenly, connect the coil and the intermediate frequency equipment with water cables, after the intermediate frequency equipment is powered on and watered;

[0053] 2) Start the intermediate frequency heating equipment. After the steel pipe is heated, the temperature is 200℃~220℃, the time is 60min, the intermediate frequency voltage is 600V, and the DC current is 870A;

[0054] 3) Adjust the roller spacing of the transfer trolley to 1130mm, the roller speed to 7r / min, and the travel speed of the transfer trolley to 200mm / min;

[0055] 4) The tube transfer trolley moves forward evenly at the set speed, and starts to heat the steel pipe....

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Abstract

The invention discloses an induction heating device in a steel pipe. The induction heating device in the steel pipe comprises a cantilever support, a cantilever, a built-in heating coil and a rotatingpipe trolley. The cantilever support is of an extensible and retractable structure and is vertically fixed to a cured floor, and the extensible and retractable structure is a hydraulic or pneumatic or rack adjusting mechanism which can achieve relative movement. One end of the cantilever is perpendicularly connected with the cantilever support, and the other end of the cantilever is connected with the built-in heating coil. The built-in heating coil is a medium-frequency heating coil and is suitable for built-in heating of all steel pipes with magnetoconductivity. The diameter of the built-in induction coil is determined according to the sizes of the steel pipes. According to the induction heating device in the steel pipe, continuous local heating is carried out; and the induction heating device in the steel pipe has the advantages that the heating speed is high, oxidation is slight, the temperature is uniform, the temperature control precision is high, the energy consumption is low(the heating efficiency is 85% or above), no pollution is caused, equipment installation is convenient and rapid, the period is short, and the investment is relatively low.

Description

technical field [0001] The invention belongs to the technical field of steel pipe heating, and specifically relates to an induction heating device inside a steel pipe and a heating method using the device, mainly for large-diameter steel pipes with external stiffening rings. [0002] technical background [0003] The induction heating device utilizes medium frequency induction heating. At present, the industry mainly adopts the overall heating of the heating furnace for the large-diameter steel pipes with external stiffening rings. The overall heating investment of the heating furnace is high, the site occupies a large area, and the energy consumption utilization rate is only about 60%. All iron parts will be heated. Contents of the invention [0004] This device mainly solves the problem of heating a large-diameter steel pipe with a stiffening ring outside by using an intermediate frequency induction coil; this device uses a coil built into the steel pipe to improve energ...

Claims

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Application Information

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IPC IPC(8): C21D1/42C21D9/08
CPCC21D1/42C21D9/08Y02P10/25
Inventor 王永平李品清张平
Owner XUANHUA ZHONGDA ANTI CORROSION CO LTD
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