Double head trolley heat treatment furnace for Tempering Quenching and Preheating

1.Application

  The double head trolley resistance furnace can be used for tempering, quenching, preheating and other heat treatment of various metal parts and materials.

2.Features

  The double head trolley resistance furnace for heat treatment has the following features.

2.1The electric resistance furnace is equipped with hot air circulation device to make the furnace temperature uniform and the workpiece heated evenly.

2.2The electric furnace has large loading capacity and high productivity. It is suitable for tempering, quenching and preheating of various types of parts.

2.3The furnace lining adopts full fiber structure to improve the thermal insulation performance of the furnace body, save energy and reduce production cost.

2.4The furnace has convenient charging and good operating conditions.

2.5The furnace door is of front and rear double opening type, and two loading trolleys work in turn to save energy and improve efficiency, which is convenient to operate.

2.6The electric furnace is equipped with interlocking protection device, which can prevent faults and accidents caused by misoperation.

2.7No environmental pollution and good environmental benefits.

3.Structure Advantages

  The shell of this series of electric resistance heat treatment oven is welded with steel plate and section steel, and the bottom of the atmospheric furnace body is connected with the trolley light rail. Users do not need basic installation, but only need to put it on the flat cement ground.

  The lining of double head trolley resistance furnace for heat treatment adopts full fiber structure, which saves about 50% energy compared with brick furnace. It is made of high-quality long fiber barbed blanket to make300×300×300mm compressed fiber module, and the compression amount is reserved in the compressing process to ensure that after the module is built, each ceramic fiber block expands in different directions, so that the modules are squeezed into a whole without gap, so as to achieve good heat insulation and thermal insulation effect, and the construction of the product is convenient and fast.Compared with other products, it has the advantages of low thermal conductivity, low heat capacity, excellent corrosion performance, excellent thermal stability, thermal shock resistance and thermal insulation, and the anchor is set on the cold surface of the furnace body, which improves the high-temperature strength of the fiber.

  The heating element is made of high-temperature resistance alloy wire wound into strip and spiral shape, which are hung and placed on the furnace side, furnace door, rear wall and trolley wire brick respectively, and fixed with high aluminum porcelain nails.

  High strength and high temperature resistant cast steel furnace bottom plate is laid on the trolley to carry workpieces.In order to prevent the oxide scale generated after heating the workpiece from falling around the heating element through the gap between the furnace bottom plate and causing damage to the heating element, the contact between the furnace bottom plate and the furnace body adopts plug-in contact.In order to ensure normal use, it is necessary to frequently purge the oxide scale under the bottom plate of the trolley furnace. Generally, purge once a week. During purging, lift the bottom plate of the furnace and purge the oxide scale in the resistance wire groove with compressed air. Pay attention to prevent the oxide scale from causing short circuit in the furnace wire.

  The furnace door device is composed of furnace door, furnace door lifting mechanism and furnace door pressing device.The shell of the furnace door is welded by section steel and plate, with a firm frame structure, which is stacked with refractory fiber pressing modules. It is required to have good thermal insulation performance and light weight.The lifting device of double head trolley resistance furnace door adopts electric device, which is mainly composed of furnace door frame, furnace door lifting beam, reducer, sprocket, transmission shaft and bearing. The lifting of furnace door is driven by the positive and negative transmission on the reducer.The furnace door lifting reducer is also equipped with a brake device, which can effectively prevent the displacement of the furnace door during the lifting process.The furnace door pressing device adopts the domestic advanced spring lever pressing structure. When the furnace needs to be lifted, the self weight of the furnace door will automatically release the furnace door through the lever and move it horizontally out of a certain distance and then rise. When the furnace door falls in place, the spring force will move the furnace door horizontally into the pressing and sealing state through the lever. The pressing device of this structure makes the furnace door free of friction. It has the characteristics of good performance and long service mission.