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Nozzle cooling vacuum gas quenching furnace capable of convection heating

A technology of convection heating and vacuum air, applied in the direction of quenching agent, quenching device, heat treatment equipment, etc., can solve the problems of uneven furnace temperature and large heat loss of fixed return air outlet, improve heating speed and uniformity, and excellent cooling performance , the effect of reducing heat loss

Inactive Publication Date: 2008-12-10
SHENYANG HENGJIN VACUUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nozzle cooling system adopts a fixed air return port. When the convection heating function is added, the heat loss of the fixed air return port is large, and it will also cause convection of the gas inside and outside the furnace heating room, resulting in uneven furnace temperature.

Method used

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  • Nozzle cooling vacuum gas quenching furnace capable of convection heating
  • Nozzle cooling vacuum gas quenching furnace capable of convection heating
  • Nozzle cooling vacuum gas quenching furnace capable of convection heating

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Embodiment Construction

[0013] The convective heating nozzle cooling vacuum air quenching furnace of the present invention is shown in Figure 1. The furnace shell 11 is a cylinder, and a cooling fan 10 is arranged at one end. The axial direction of the furnace body is parallel to the ground, and an automatic control system is adopted. The heating chamber 4 inside the shell is a square structure, as shown in Fig. 2a. The cooling air ducts and nozzles 6 are arranged around the square heating chamber, and the nozzles 6 are perpendicular to the surface of the central square working area. The front and rear ends of the heating chamber 4 axially have return air outlets, and the air return openings have openable and closable dampers 3,9. Fan motor etc. are all contained in the furnace shell 11, no longer need sealing. Can open and close damper 3,9 all adopt the opening and closing damper structure of parallelogram, and establish respective door-opening cylinder 1,7, the seal that cylinder introduces furnace...

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Abstract

The invention discloses a nozzle cooling vacuum gas-quenching furnace which can perform convection heating, wherein, a furnace body is axially parallel to the ground, and an automatic control system is adopted. The nozzle cooling vacuum gas-quenching furnace is characterized in that: a heating chamber has a square body structure, cooling air ducts and nozzles are arranged around the inner wall of the square heating chamber, the nozzles are perpendicular to the surface of a working zone, two longitudinal ends of the heating chamber are provided with return air inlets, open-close air door structures with parallelogrammic rods are adopted, respective door opening cylinders are arranged and move almost perpendicular to a heat insulation layer, a convection fan is arranged in the heating chamber, and metal bellowses are used as dynamic seals at the sealing positions where the cylinders are introduced into the furnace; in a control system, each executive component is provided with an electromagnetic element which is connected with a circuit of the control system, and the opening and closing of air doors, the starting and stopping of the convection fan, and heating and cooling processes during the operation are interlockingly controlled by the control system. The novel heating chamber structure realizes convection heating, improves heating rate and evenness, reduces heat loss and also improves cooling effect.

Description

technical field [0001] The invention relates to a gas-quenching vacuum furnace for metallurgical equipment, which has convection heating nozzles for cooling the vacuum gas-quenching furnace. Background technique [0002] In the vacuum air quenching furnace, the nozzle cooling method is used, and the cooling speed is faster than the air door structure parallel airflow cooling method, which has been proved by practice. However, the nozzle cooling system adopts a fixed air return port. When the convection heating function is added, the heat loss of the fixed air return port is large, and it will also cause convection of the gas inside and outside the furnace heating room, resulting in uneven furnace temperature. Contents of the invention [0003] The object of the present invention is to provide a nozzle-cooled vacuum air quenching furnace capable of convective heating, which realizes convective heating, has low heat consumption and excellent cooling performance. [0004] Th...

Claims

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Application Information

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IPC IPC(8): C21D1/62C21D1/773C21D1/613
Inventor 杨建川石岩曲绍芬张晓东赵建业高光伟
Owner SHENYANG HENGJIN VACUUM TECH
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