Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot

A low-alloy steel and cutting torch technology, which is applied in the field of oxygen cutting devices for super-thick low-carbon steel ingots, can solve the problems of insufficient thickness of low-alloy steel ingots, and achieve the effects of less particle residue, narrow slits, and high-quality cutting surfaces

Active Publication Date: 2013-03-27
HARBIN WELDING INST LTD
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Problems solved by technology

[0004] In order to solve the problem in the background technology that the thickness of low-carbon and low-alloy steel ingots cut by the oxygen cutting method cannot reach 2000-3500 mm, the present invention proposes an oxygen cutting torch capable of cutting super-thick low-carbon steel ingots of 2000-3500 mm

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  • Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot
  • Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot
  • Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot

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Embodiment 1

[0037] Article with the present invention such as Figure 1~3 The torch cutting material shown is 25Cr1Mo alloy steel with a thickness of 3100 mm.

[0038] The cutting nozzle 7 in the cutting torch is provided with some annularly distributed preheating oxygen channels 5 and gas channels 6 . Utilize the process specification of cutting torch cutting of the present invention as follows:

[0039] The cutting oxygen inlet pressure that passes into the cutting oxygen input pipe 2 is 1.0MPa,

[0040] The cutting oxygen flow rate flowing out from the cutting nozzle 7 is 1400Nm 3 / h,

[0041] The preheated oxygen pressure input by the preheated oxygen input pipe 1 is 1.0PMPa,

[0042] The preheating oxygen flow rate flowing out from the preheating channel 5 is 420Nm 3 / h,

[0043] The gas pressure input by the gas input pipe 4 is 0.2MPa,

[0044] The gas flow rate flowing out from the gas channel 6 is 140Nm3 / h;

[0045] The cutting speed using the above torch and process speci...

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Abstract

The invention provides a cutting torch for cutting an ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot and belongs to the technical field of the ultrahigh-thickness low-carbon steel ingot oxygen cutting device. The invention aims to solve the technical problem in the background art that the 2000-3500 mm ultrahigh-thickness low-carbon and low-alloy steel ingot cannot be cut at high efficiency and good quality. The cutting torch is mainly characterized in that preheating oxygen and propane gas are not mixed inside the cutting tip of the cutting torch at first, and mixed and burnt in atmosphere after being jet out of the cutting torch instead, a preheating oxygen duct (5) and a gas duct (6) both are inclined toward the axis of the cutting torch, the diameter of the throat part of a large-flow cutting oxygen cutting tip (7) is 17-22 mm, each gas duct (6) is designed into a structure with the lower part thereof slightly spread, and the diameter of the inlet thereof is 4.5 mm, the spreading taper angle is 1.146% and the length of the spreading section is 8 mm. The cutting torch provided by the invention is suitable for good-quality and high-efficiency cutting of the ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot.

Description

field of invention [0001] The application of the present invention proposes a cutting torch for cutting low-carbon and low-alloy steel ingots with an ultra-large thickness of 2500-3500mm, which belongs to the technical field of oxygen cutting devices for ultra-large-thickness low-carbon steel ingots, and especially relates to low-carbon and low-alloy steel ingots with a thickness or diameter of 2500-3500mm High-quality, high-efficiency torch for low-alloy steel ingots. Background technique [0002] The level of basic manufacturing equipment in the 21st century is mainly reflected in several aspects such as large-scale, high precision, high efficiency, low cost and high flexibility. Upsizing is one of the important characteristics of preparing high-end products for manufacturing. To manufacture large-scale equipment and large-scale basic manufacturing equipment, large or even super-large castings / forgings are required as blanks to manufacture large-scale equipment parts. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/42F23D14/46F23D14/54
Inventor 韩永馗于浩楠周坤林潮涌赵松柏王智新黄为军
Owner HARBIN WELDING INST LTD
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