Pit-type nitriding furnace

Abstract

The invention relates to a pit-type nitriding furnace. The pit-type nitriding furnace comprises a furnace shell, a furnace cover, an inner furnace container and a wind guide barrel. The inner furnace container is arranged inside the furnace shell. The wind guide barrel with the two ends open is hung in the inner furnace container. A tripod is arranged between the wind guide barrel and the inner furnace container for supporting. The bottom of the inner furnace container is an arc surface. A furnace container bottom board is arranged at the position where the bottom of the inner furnace container and an inner furnace container body are connected and is provided with holes. A draught fan is fixed in the middle of the upper end of the furnace cover. A cooling water tank is arranged between the draught fan and the furnace cover. A heat collection box is fixed to the lower end of the furnace cover. The draught fan is connected with a blade through a shaft penetrating through the heat collection box. The draught fan is arranged on the furnace cover, the wind guide barrel is arranged inside the inner furnace container, and the draught fan and the inner furnace container are matched, so that gas is emitted and circulates from bottom to top and heat inside the furnace is distributed more uniformly. The tripod is arranged between the wind guide barrel and the inner furnace container and further improves the intensity of the inner furnace container, and the inner furnace container can be effectively prevented from deforming.

Description

technical field [0001] The invention relates to heat treatment equipment, in particular to a well type nitriding furnace. Background technique [0002] The well-type nitriding furnace is a barrel-shaped structure, which is generally used for thermal processing of parts such as injection molding machines, braiding machine barrels, and screws. For many years, ordinary nitriding furnaces produced by general manufacturers use ordinary 321 stainless steel furnaces, and The nitriding furnace is not equipped with a fan, the temperature uniformity of the furnace is poor, the cooling speed is slow, and the hardness of the product is inconsistent, which cannot meet the customer's requirements. [0003] The inner furnace of the ordinary well-type nitriding furnace has been in a high-temperature and high-pressure working environment for a long time, and the inner furnace is heated unevenly, which causes the inner furnace to be easily deformed and affects the service life; the furnace sh...

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Problems solved by technology

[0002] The well-type nitriding furnace is a barrel-shaped structure, which is generally used for thermal processing of parts such as injection molding machines, braiding machine barrels, and screws. For many years, ordinary nitriding furnaces produced by general manufacturers use ordinary 321 stainless steel furnaces, and The nitriding furnace is not equipped with a fan, the uniformity of the furnace temperature is poor, the cooling speed is slow, and the hardness of the product is inconsistent, which cannot meet the customer's requirements

[0003] The inner furnace of the ordinary well-type nitriding furnace has been in a high-temperature and high-pressure working environment for a long time, and the inner furnace is heated unevenly, which causes the inner furnace to be easily deformed and affects the service life; the furnace shell of the ordinary well-type nitriding furnace and There is only one layer of lining made of refractory material between the inner furnaces, and the heat loss is high, which makes the energy consumption of the nitriding furnace high and the processing efficiency is low

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