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An ultra-long pier thickening device for a large-wall-thick seamless steel pipe and its application method

A technology of seamless steel pipe and pier thickness, which is applied in forging/pressing/hammer devices, heating/cooling equipment, forging furnaces, etc., which can solve the straightness difference and bending of the heating part of the pipe end, which affects the product processing pass rate and affects the processing efficiency And other problems, to achieve the effect of improving processing efficiency, not easy to bend, and improving utilization rate

Active Publication Date: 2022-04-05
NANTONG YONGDA PIPE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After the existing large-wall thick seamless steel pipe is super-long (heating length reaches 1m to 1.2m) intermediate frequency heating, it is easy to appear that the straightness of the heating part of the pipe end is very poor The phenomenon of folding appears on the surface, and the serious bending will seriously affect the processing efficiency in the later stage. After the folding occurs, it will seriously affect the processing pass rate of the product

Method used

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  • An ultra-long pier thickening device for a large-wall-thick seamless steel pipe and its application method
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  • An ultra-long pier thickening device for a large-wall-thick seamless steel pipe and its application method

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Embodiment 1

[0037] see Figure 1-6 , a large-wall thick seamless steel pipe ultra-long thick pier device and its use method, comprising an intermediate frequency induction furnace 1, the left end of the intermediate frequency induction furnace 1 is fixedly connected with an L-shaped mounting plate 2, and the inner wall of the L-shaped mounting plate 2 is fixedly connected with a pair of cylinders 3. The output end of the cylinder 3 is fixedly connected with the movable mold 4, and the intermediate frequency induction furnace 1 is equipped with a heating chamber 5, the movable mold 4 is located in the heating chamber 5, and the heating chamber 5 is equipped with a core rod, and the diameter of the core rod is as thick as required The inner diameter of seamless steel pipe 8 is generally 1.8mm-2mm smaller than the inner diameter. The end diameter of the core rod is generally 68% of the final outer diameter that needs to be thickened. The outer end of the core rod is fixedly connected with a f...

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Abstract

The invention discloses an ultra-long thickening device for a large-walled seamless steel pipe and a method for using the same, and belongs to the technical field of thickening of steel pipes. This scheme makes the heating part of the seamless steel pipe difficult to Bending to reduce the folding phenomenon of the inner wall of the seamless steel pipe. After the seamless steel pipe pier is roughly formed, the cooling water in the water tank is sprayed out through the nozzle to form cooling water mist, which cools the moving mold and the seamless steel pipe. The water after heat exchange is collected, and the water is pumped into the water tank through the water pump, so that the water in the water tank is recycled, and the liquid nitrogen in the liquid nitrogen tank is circulated in the spiral tube through the air pump to cool down the high temperature water. The nitrogen gas formed after the heat exchange is pressurized by the suction pump, so that the nitrogen gas is pressurized and liquefied again. With the help of the easy deformation of the memory alloy ring at low temperature, the seamless steel pipe can be taken more easily after the forming is completed. convenient.

Description

technical field [0001] The invention relates to the technical field of steel pipe pier thickening, and more specifically relates to a super-long pier thickening device for a large-wall-thick seamless steel pipe and a method for using the same. Background technique [0002] Seamless steel pipes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in construction, such as steel scaffolds, are used to make ring parts with steel pipes, which can improve the utilization rate of materials, simplify the manufactu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/08B21J9/08B21J17/02B21J13/02B21K29/00
CPCB21J5/08B21J9/08B21J17/02B21J13/02B21K29/00
Inventor 徐培林
Owner NANTONG YONGDA PIPE IND
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