RU102378U1 - CHAMBER TRANSFORMABLE ELECTRIC FURNACE - Google Patents

Abstract

 A transformable chamber electric furnace for heating parts before stamping, containing a working chamber, an internal refractory lining from the hearth, arch and side parts, electric resistance heaters, loading windows, characterized in that the guides are installed in the hearth and arched parts, in which a refractory partition is installed, which is placed in the furnace when heating large parts, with additional electric resistance heaters, and the loading windows are located between the refractory partition and the sides parts of the lining.

Description

The utility model relates to the field of heating thermal equipment and can be used for heating during heat treatment of workpieces and parts of a wide range. The technical result is the provision of efficient and economical heating of billets of various shapes by installing additional electrical resistance heaters.

Known transformable chamber electric furnace "PRETTI" for heating parts of a wide range contains a metal casing made of three parts, while the hearth and vault parts are made in the form of independent heating units with heat-insulating lining and electric resistance heaters, while on the vault part on both ends are installed lined shutters, ensuring the efficient use of mechanization tools for the processes of landing and delivery of parts, and an increase in the volume of working space By increasing the height of the arch above the hearth, it is achieved by installing a spacer block between the hearth and the arch parts, on the inside of which screens are installed that reflect the flow of thermal energy from the arch and the hearth, reducing heat loss through the masonry and directing reflected heat fluxes to the parts, acting as "passive reflective heaters". The landing-heating-issuing cycle for cooling is repeated several times, and the presence of separate windows for landing and delivery allows you to effectively mechanize the process. (RF Patent: No. 2143091, F27B 3/08 of 12/20/1999)

The disadvantage of this invention is the low intensity of heating with high energy consumption and increased waste metal.

The technical result that can be obtained by implementing the utility model is to increase the heating rate and reduce the burning of metal, as well as the creation of an electric furnace that provides efficient and economical heating of workpieces of various shapes.

This technical result provides a convertible chamber furnace for heating parts before stamping, containing a working chamber, an internal refractory lining of the hearth, vault and side parts, electric resistance heaters, loading windows, characterized in that the hearth and vault parts have guides in which refractory partition placed in the furnace when heating large parts with additional resistance heaters, and loading windows are located enes between the refractory wall and the side lining parts.

The essence of the utility model is illustrated by drawings (5 Fig.), Which shows the device chamber transformable electric furnace.

In Fig.1, 2 shows a cross section of a chamber transformable electric furnace, Fig.3 is a side view, Fig.4 is a cross section of a furnace without a refractory partition for small parts, Fig.5 is a cross section of a furnace with side parts and a refractory partition for large parts.

Chamber transformable electric furnace contains:

1 - bottom part; 2 - vault; 3 - side part;

4 - hearth lining; 5 - lining of the arch;

6 - lining of the side; 7 - an element of the connection of the casing blocks;

8 - electric hearth heater; 9-electric arch heater;

10 - electric heater of the side;

11 - conclusions of electric heaters;

12 - hearth of the furnace; 13 - small-sized part;

14 - large-sized part; 15 - thermocouple;

16 - cargo eye; 17 - heat insulating backfill;

18, 19 - windows for loading and unloading;

20 - refractory partition;

21 - electric heaters of resistance of the refractory partition;

22 - the threshold.

Chamber transformable electric furnace works as follows.

When heating large-sized parts (14) in the furnace, the side part (3) with the lining (6) and electric heaters (10) are sequentially installed on the hearth (1) with the lining (4), electric heaters (8) and the hearth (12), refractory partition (20) with electric resistance heaters (21) and the vault part (2) with lining (5), with electric heaters fixed on the inside of the roof (9), loading and unloading windows (18) and (19) and thermocouples (fifteen). Then, the power supply of the heaters (8, 9, 10, 21) is connected through the terminals (11), and the thermocouples (15) are connected to the control devices and the furnace is turned on for heating. Upon reaching the temperature regulated by the technological process, one of the loading windows is opened (18, 19) and large parts (14) are placed on the hearth (12). To reduce heat loss, an insulating filling (17) is additionally placed on the roof of the furnace. For transportation and rearrangement of the furnace blocks (1, 2 and 3) they are equipped with cargo ears (16). Under such conditions, the heating of large-sized parts (14) is carried out from all sides, which increases the heating rate, reduces the waste of metal, and saves electricity.

When heating small parts from the furnace, the refractory partition (20) and the side part (3) are removed. Parts are heated due to electric heaters (8) and (9) hearth (1) vault (2) parts, which provides the necessary heating rate.

Claims (1)

A convertible chamber electric furnace for heating parts before stamping, containing a working chamber, an internal refractory lining from the hearth, arch and side parts, electric resistance heaters, loading windows, characterized in that guides are installed in the hearth and arched parts, in which a refractory partition is installed, which is placed in the furnace when heating large parts, with additional electric resistance heaters, and loading windows are located between the refractory partition and the sides parts of the lining.