Device for cutting steel through natural gas and oxygen mixed flames

Abstract

The invention discloses a device for cutting steel through natural gas and oxygen mixed flames. The device comprises a cutting mouth head and a cutting mouth sleeve, and is characterized in that the gas outflow section of the cutting mouth head is sleeved with a cutting mouth, and a cutting oxygen hole is formed in the middle of the cutting mouth head; the cutting mouth head comprises a gas inflow section, a mixing section and the gas outflow section, and the gas inflow section is provided with three conical steps which are the cutting oxygen step, the preheating oxygen step and the natural gas step respectively; multiple preheating oxygen inlet holes are drilled in the preheating oxygen step and communicated with mixing holes of the mixing section; and multiple natural gas inlet holes are drilled in the natural gas step and communicated with the mixing holes of the mixing section. The process is advanced, fuel, oxygen and the steel are saved, environment friendliness is achieved, and meanwhile, the device is further suitable for steel flame cutting, continuous casting, steel structure correcting, gas welding and other work.

Description

technical field [0001] The invention relates to a device for cutting steel with a mixed flame of natural gas and oxygen. Background technique [0002] At present, most of the gases mainly used in flame cutting are acetylene, propane, liquefied petroleum gas, hydrogen and oxygen, etc., and the calorific value of the gas is generally above 12,000 kcal / m3; the current external mixing cutting nozzle and supersonic cutting nozzle Both have the disadvantages of large gas consumption, corresponding carbon dioxide emissions, steel slits at 8 to 20mm, black smoke and loud noise during cutting, and the upper edge of the steel is collapsed after cutting, and slag is hanging on the lower edge; while natural gas is cheap , but its calorific value is only about 8500 kcal / m3. Using the current cutting nozzle to cut will increase the amount of gas consumption, and the loss of steel is quite large, which cannot achieve the goal of energy saving, emission reduction and consumption reduction. ...

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Problems solved by technology

[0002] At present, most of the gases mainly used in flame cutting are acetylene, propane, liquefied gas, hydrogen and oxygen, etc., and the calorific value of the gas is generally above 12,000 kcal / m3; Both have the disadvantages of large gas consumption, corresponding carbon dioxide emissions, steel slit at 8-20mm, black smoke and loud noise during cutting, upper edge collapse and lower edge slag hanging of steel after cutting; while natural gas is cheap , but its calorific value is only about 8500 kcal / cubic meter, using the current cutting nozzle cutting will increase more gas consumption, and the loss of steel is quite large, which cannot achieve the goal of energy saving, emission reduction and consumption reduction

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