Direct gas quenching unit for mesh-belt continuous brazing furnace

Abstract

The invention discloses a direct gas quenching unit for a mesh-belt continuous brazing furnace, which comprises a gas quenching chamber (1) and a high-pressure centrifugal fan (7), wherein the gas quenching chamber (1) is connected with a brazing furnace (9), and the high-pressure centrifugal fan (7) is driven by a variable-frequency motor (8). The invention is characterized in that the upper part of the gas quenching chamber (1) is provided with a gas injection chamber (2) and a rotatable and adjustable gas curtain (3); the gas injection chamber (2) is communicated with an air outlet of the high-pressure centrifugal fan (7) through an air inlet pipe (6), and the air inlet pipe (6) is provided with a branch pipe (11) communicated with a liquid ammonia decomposing furnace; the top of the gas quenching chamber (1) is provided with an air suction pipe (4); the air suction pipe (4) is communicated with an air inlet of the high-pressure centrifugal fan (7) through a filter (10) and cooler (5); and the air inlet pipe (6) can be provided with a hydrogen adsorption device (12). The gas quenching unit is directly used for quenching workpieces by using nitrogen and hydrogen, which are generated by the brazing auxiliary apparatus-liquid ammonia decomposing furnace and pressurized by the fan; and compared with the oil-quenched workpieces in the prior art, the workpieces which are directlyquenched by gas with the gas quenching unit have the advantages of no surface oxidation, reliable quality, high production efficiency and lower production cost, and the hardness can be adjusted and set according to needs.

Description

Technical field [0001] The invention belongs to the technical field of welding and quenching equipment, and relates to a direct gas quenching device for a mesh belt type continuous brazing furnace. Background technique [0002] After the workpieces in the prior art are brazed in the brazing furnace, most of the workpieces are manually clamped and quenched in water or oil. This quenching method is time-consuming and laborious, and it is difficult to achieve continuous and automated production, and there is also uneven quenching of the workpiece. Problem: In addition, there is also a technical problem that the gas produced by the auxiliary equipment of the welding and quenching process is seriously polluting the environment. [0003] In order to realize the automation of quenching, application number 201010124182.5 discloses an atmospheric nitrogen and water mixed gas jet quenching device, which includes an air compressor, an oil-water separator, a dryer, a nitrogen generator, a boos...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of uneven quenching of the workpiece, high production cost and serious environmental pollution in the prior art, and provide a direct gas quenching device for the mesh belt type continuous brazing furnace to overcome the deficiencies of the prior art

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