Elevator vacuum furnace “PEV-5.5/1200” intended for heat treatment of parts or heat treatment of parts with oil quenching.

The elevator vacuum furnace “PEV-5.5/1200” consists of the following components:
Heating chamber,
Top lid,
Oil system,
Mechanism for moving the lower sash,
Heating section,
Cage lifting mechanism,
Vacuum system,
Hearth,
Loading door,
Water-cooling system,
Pneumatic system,
Power cabinet,
Control cabinet,
Operator cabinet,
Electrical wiring,
Control panel,
Door pillar,
Recirculating water-cooling system,
Console.

The operation of the “PEV-5.5/1200” furnace consists of heating the workpiece in a vacuum to a certain temperature and carrying out heat treatment of the parts with quenching in oil.
Structurally, the “PEV-5.5/1200” furnace made in the form of a vertical vacuum chamber, where the top is a heating chamber, the bottom is a hardening chamber. The top lid installed on the heating chamber. The loading door installed on the lower chamber.
A heating section with niobium tape heaters and seven-layer screen thermal insulation mounted in the heating chamber.
Heating chamber has connections to a vacuum system.
The lower chamber contains vacuum quenching oil inside. The drive for the cage lifting mechanism is installed in the lower chamber too.
The oil system serves to ensure circulation of quenching oil. It consists of an oil pump, a heat exchanger, an oil tank and pipelines.
The hearth consists of a support table and a lid. Product in a cage is located on the hearth while heating and hardening process.
The loading door is used to load the charge for heating and hardening. The door moves along the guides manually.
The water-cooling system serves to supply and drain water necessary for cooling the vacuum system pumps, cooling the quenching oil through the heat exchanger, heating and quenching chambers.
The pneumatic system is designed to control pneumatic drives of vacuum valves and mechanisms. The pneumatic system consists of an air preparation unit, a pneumatic distributor panel and pipelines.
The electrical wiring supplies the power from the transformer to the heaters and provides the power to the control circuits of the mechanisms of units with electric drives. Electrical wiring has a busbar, harnesses, protective covers and boxes in which the wires are laid.
The power cabinet, control cabinet, operator cabinet and control panel ensures uninterrupted operation and control of the technological process performed on the furnace.
The vacuum system creates a vacuum in the chamber. The system consists of a fore-vacuum pumping line and a high-vacuum pumping line.

“PEV-5.5/1200” has control from the front panels:
- power cabinet;
- control cabinet;
- operator console;
- control panel;
The controls for the vacuum system and mechanisms are located on a grapfic diagram located on the front panel of the control cabinet, the heating controls are on the front panel of the operator's console. Equipping the plant with a two-level control system ensures that the technological process is carried out in service, manual, and automated modes. At the lower level of the control system, a logical programmable controller is used. At the top level is an industrial computer.