Pit type heat treatment furnace

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Well-type heat treatment furnace (hereinafter referred to as electric furnace) is a cycle-type electric furnace, mainly for the general medium and small metal or alloy parts in the low 650 ℃ air tempering heat treatment purposes. Furnace with a fan device and the wind guide system, the furnace temperature uniformity control within ± 5 ℃, to ensure uniform heating of the workpiece. Temperature control system adopts Shanghai Guolong TCW-32A intelligent instrument PID zero-crossing trigger SCR, high-precision smart table temperature control, temperature control accuracy, good temperature stability.

Structure introduction

Well-type heat treatment furnace from the furnace, furnace cover, furnace cover opening and closing institutions, hot air circulation device, protection baskets and temperature control system.

Furnace shell with steel welding shape, with 0.6g / cm3 ultra-light energy-saving refractory brick masonry shaft furnace, load-bearing parts and easy collision parts with heavy refractory brick masonry Agent), to enhance the strength of lining structure. Insulation layer using aluminum silicate refractory fiber, asbestos board insulation materials, improve the furnace insulation performance, reduce the furnace side surface temperature.

Heating element using 0Cr25Al5 alloy wire, wound into a spiral, resting on the stove around the furnace laying brick, and fixed with a fixed brick outlet brick to prevent prolapse. RJ2-35-6-type and RJ2-55-6-type furnace shallow furnace, the heating element is a district layout; furnace shell is also welded with steel, the inner wall with 1Cr18Ni9Ti heat-resistant steel production, long service life. Furnace lid lining aluminum silicate refractory fiber insulation and insulation, can improve the thermal insulation performance, but also reduce the weight of the lid. Gland and furnace body sealing adopts plug-in structure, the sealing material is aluminum silicate refractory fiber or clean dry river sand to prevent the heat from spreading.

Opening and closing the lid structure:

Well-type heat treatment furnace, due to heavier furnace cover, it uses hydraulic institutions. When you need to open the lid, first start the pump motor, the hydraulic oil output by the gear pump, through the one-way valve into the hydraulic cylinder, to promote the furnace lid; furnace lid off the seal groove, grab handle to the furnace cover to the side that is can. When you need to close the lid, first align the lid with the seal groove, and then open the return pipe valve, the hydraulic oil flows back into the oil reservoir from the hydraulic cylinder, and the lid descends.

In order to ensure uniformity of the furnace temperature, the electric furnace is provided with a ventilator device and a wind guide mechanism. Ventilator installation on the furnace cover, fan and fan shaft are made of 1Cr18Ni9Ti heat-resistant steel, long service life. The guide tube is also made of 1Cr18Ni9Ti heat-resistant steel can be used as a guide tube, can also be used as a loading basket. Air duct placed in the center of the furnace, the lower part of the loading basket seat. The fan is of centrifugal type. When the fan rotates at a high speed, the wind blows out of the fan, blows the heating element along the wind deflector and then blows the workpiece from the lower part of the wind deflector and then sucks into the fan from the air guide below the fan and then blows it out … …. So reciprocating cycle, the workpiece heated evenly.

In order to prevent loading basket (air guide tube) into and out of the furnace collision heating elements and furnace body, the furnace is equipped with protective baskets, protection baskets are also made of 1Cr18Ni9Ti heat-resistant steel.