Soft belt type electromagnetic induction heater
An electromagnetic induction and heater technology, which is applied in the direction of induction heating, induction heating devices, metal processing equipment, etc., can solve the problems of large influence of external climate interference, influence on welding quality and work efficiency, and uneven heating temperature, so as to reduce labor intensity , easy operation, and improved preheating efficiency
Inactive Publication Date: 2010-10-20
CHINA PETROLEUM PIPELINE BUREAU
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Problems solved by technology
[0004] (1) Flame heating: using liquefied petroleum gas, the flame generated by the ring heater directly heats the welding joint. This method is not only greatly affected by external climate interference, but also has low preheating efficiency and uneven heating temperature. Coking occurs on the part, which affects the welding quality and work efficiency; in addition, it is necessary to configure and transport a large number of flammable liquefied gas cylinders, and follow the construction mobile operation, which increases the construction cost;
[0005] (2) Resistance heating: use rigid stainless steel soft belt material as pure resistance load,
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[0048] Example. This example is a prototype of a soft-belt electromagnetic induction heater, which was tested on a pipeline with Φ1219mm and a wall thickness of 18.4mm at a certain construction site.
[0049] The structure of this example is figure 1 As shown, it is composed of flexible belt 1, electrical connector 2, electrical connector opening and closing mechanism 3, quick connector socket 4, high frequency flexible cable 5, sheath 6, insulating fiber 7 and high temperature resistant flame retardant cloth 8 .
[0050] The two ends of the flexible belt 1 with four high-frequency flexible cables 5 are connected to the electrical connector 2. The multiple high-frequency flexible cables 5 are spirally connected to the heating coil body through the quick connector socket 4 in the electrical connector 2. Two external quick connector sockets 4 are connected to the intermediate frequency power supply. The electromagnetic induction coil, the high temperature resistant insulation materi...
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The invention provides a soft belt type electromagnetic induction heater used for butt welding in pipeline engineering, which relates to the technical field of pipeline systems. The soft belt type electromagnetic induction heater comprises an induction heating ring. The invention is characterized in that high-temperature-resistance insulation fiber (7) and high-temperature flame-retardant cloth (8) are adopted to be covered outside a high-frequency soft cable (5) to be made into heating soft belts (1) in different specifications according to different diameters of steel pipes, both ends of the heating soft belts (1) are provided with purpose-made electric connectors (2) so that the high-frequency soft cable (5) forms a spiral wire heating ring, and the output current of a middle-frequencypower supply is communicated with both ends of the spiral wire for heating pipe openings. The invention has the advantages that the installation/dismounting operation of the soft belt type electromagnetic induction heater on/from the steel pipes is convenient, the use is safe and reliable, the problem of the existing middle-frequency induction heating technology in the large-caliber long oil transmission gas pipeline welding preheating construction is solved, and the requirement of high-efficiency welding construction of the engineering is met.
Description
technical field [0001] The invention is a soft belt type electromagnetic induction heater for butt welding in pipeline engineering. It relates to the technical field of piping systems. Background technique [0002] In the construction process of long-distance oil and gas pipelines, welding is a key link, and the quality of welding directly affects the service life and safety of products. In order to reduce welding residual stress and prevent weld cold cracks from occurring, before welding steel pipes made of high-strength and low-alloy materials, preheating the weld joint is an important process measure to ensure welding quality. [0003] At present, during the installation of long-distance oil and gas pipelines in the field, there are several ways to preheat the welded joints of steel pipes: [0004] (1) Flame heating: using liquefied petroleum gas, the flame generated by the ring heater directly heats the welding joint. This method is not only greatly affected by externa...
Claims
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Inventor 孙克刚陈连山侯俊夕刘涛杨文会
Owner CHINA PETROLEUM PIPELINE BUREAU
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