Sealed and uniform-temperature type bogie type gas-fired preheating furnace

Abstract

The invention discloses a sealed and uniform-temperature type bogie type gas-fired preheating furnace and belongs to the technical field of gas-fired heating furnaces. The key point of the technical scheme of the invention is as follows: the sealed and uniform-temperature type bogie type gas-fired preheating furnace comprises a furnace body, a furnace door, an air preheater, a fuel gas heating device, a temperature equalization device and a hot air circulating device, wherein a bogie device and the furnace body are sealed through a holding-down gear, the air preheater consists of an air inlet pipe, a preheating chamber, a U-shaped communicating tube, a heat exchange tube and an air supply pipe, the fuel gas heating device consists of a fuel gas chamber and a fuel gas burner nozzle, the fuel gas burner nozzle is fixed on the sidewall of the fuel gas chamber, the temperature equalization device consists of a temperature equalization plate, rectangular spray nozzles and a hot air header pipe, and the hot air circulating device consists of a recirculating blower, an air outlet and an air inlet. According to the sealed and uniform-temperature type bogie type gas-fired preheating furnace, the manufacturing is excellent, practical and safe, the operation is reliable, the pollution is light, the work efficiency is high, and workpieces in the furnace can be uniformly heated, so that relatively high furnace temperature uniformity is obtained.

Description

technical field [0001] The invention belongs to the technical field of gas heating furnaces, and in particular relates to a sealed and uniform temperature trolley-type gas preheating furnace. Background technique [0002] For large welding workpieces, stress relief annealing treatment is required after welding, and then machining. The quality of the heat treatment of the workpiece plays an important role in the machining accuracy and the performance of the workpiece. The uniformity of the furnace temperature is very important in the furnace design. An important link, the uniformity of the furnace temperature directly affects the heat treatment quality of the workpiece. Due to the setting problem of the general annealing furnace during operation, the temperature control accuracy is low and the work efficiency is low. Due to the poor sealing setting, the fuel consumption is high, and the equipment is in It is easy to generate noise and harmful gas during operation, and the hea...

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Problems solved by technology

[0002] For large welding workpieces, stress relief annealing treatment is required after welding, and then machining. The quality of the heat treatment of the workpiece plays an important role in the machining accuracy and the performance of the workpiece. The uniformity of the furnace temperature is very important in the furnace design. An important link, the uniformity of the furnace temperature directly affects the heat treatment quality of the workpiece. Due to the setting problem of the general annealing furnace during operation, the temperature control accuracy is low and the work efficiency is low. Due to the poor sealing setting, the fuel consumption is high, and the equipment is in It is easy to generate noise and harmful gas during operation, and the heat resistance effect is poor, which brings certain safety hazards to the work

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