CN201715850U

CN201715850U - Electrothermal furnace

Info

Publication number: CN201715850U
Application number: CN2009203143764U
Authority: CN
Inventors: 钟志华
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2009-11-09
Filing date: 2009-11-09
Publication date: 2011-01-19
Anticipated expiration: 2019-11-09

Abstract

The utility model discloses an electrothermal furnace which is used for the thermal forming of materials. The electrothermal furnace comprises a furnace body and a resistance wire arranged in the furnace body, wherein the furnace body is a cuboid box body and comprises a casing and a heat-insulation layer arranged at the inner wall of the casing, one side of the furnace body is provided with a furnace door, an opening of the furnace door is arranged on the side wall of the length direction of the furnace body, the resistance wire is arranged along the length direction of the furnace body in a spanning way, and both ends of the resistance wire are supported on the heat-insulation layer. The utility model has good heating effect, is convenient to operate and use, can enable a part to be heated to be quickly taken out and can enhance the rate of finished products and the production efficiency.

Description

A kind of electrothermal furnace

Technical field

The utility model relates to a kind of electrothermal furnace, particularly a kind of electrothermal furnace that is used for the material thermoforming.

Background technology

Industrial, in the melting and compression molding process of metal or metal alloy, all need to adopt the high-temperature electric heat stove.For example, when the punching press of car side wall stamping parts, because the structure more complicated, stress concentration point is more, and yield rate is low, and by the thermoforming punching press, just can improve yield rate.Because this part is bigger on length and width, existing electrothermal furnace generally can not satisfy it and adds heat request on the market, the structure of existing electrothermal furnace as depicted in figs. 1 and 2, it uses a plurality of resistance wires 4 on heat-insulation layer 3 inwalls that are fixed in the shell 7, the part upper and lower surface that is heated on the heat-resisting steel sheet and plate 6 in the middle of being positioned at is heated, the electrothermal furnace of this structure, the opening of its fire door 1 is located on the width.After the bigger metal sheet heating of length dimension is finished, meeting consuming time is longer relatively in the time of its fire door 1 on being located at width will being taken out, and the heating-up temperature height of metal sheet, generally about 900 ℃, and metal sheet is generally all very thin, so heat radiation is very fast, will dispel the heat inhomogeneous if take out length consuming time, cause its surface temperature inhomogeneous, yield rate is reduced.

The utility model content

The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provides a kind of can making to be heated part and to take out, heat effective, easy for operation, as to improve yield rate and production efficiency electrothermal furnace fast.

For solving the problems of the technologies described above, the technical scheme that the utility model proposes is: a kind of electrothermal furnace, comprise body of heater and be arranged at the interior resistance wire of body of heater, described body of heater is the cuboid casing, the heat-insulation layer that body of heater comprises shell and is arranged at this outer casing inner wall, a side of body of heater is provided with fire door, and the opening of described fire door is arranged on the sidewall of body of heater length direction, described resistance wire is striden along the length direction of body of heater and is established, and the two end supports of resistance wire is on described heat-insulation layer.

As to further improvement of the utility model, described resistance wire is divided into upper resistors silk and lower resistors silk, described upper resistors silk is horizontally disposed in the fire door open upper side, described lower resistors silk is horizontally disposed in the fire door open underside, the below of described upper resistors silk is provided with more than one and the vertically arranged steady arm of described upper resistors silk, and the two end supports of described steady arm is on described heat-insulation layer.

As further improving of the present utility model, described steady arm is an alundum tube.

As further improving to of the present utility model, the described heat-insulation layer of being located at the shell inner bottom part comprises light-weight insulating brick layer and the heavy insulating brick-layer of laying successively from top to bottom, described heavy insulating brick-layer is laid to the structure that the surface has many grooves, and described lower resistors silk is placed in the described groove.

As to further improvement of the utility model, described heavy insulating brick-layer is provided with carborundum plate, also is provided with heat-resisting steel sheet and plate on this carborundum plate.

Between described upper resistors silk and the set heat-insulation layer of cover top portion, be equipped with temperature inductor between upper resistors silk and the lower resistors silk.

Compared with prior art, the utlity model has following beneficial effect: electrothermal furnace of the present utility model, its fire door opening is arranged on the length direction of body of heater, even the heated length size is much larger than the part of width dimensions, also can therefrom take out fast being heated part, reduced heated components surface temperature difference, reduced that to be heated the heat radiation of part in the taking-up process inhomogeneous, guarantee to realize better the punching press effect, yield rate when improving punching press, improve productivity ratio, reduced operator's labour intensity simultaneously; The utility model both can satisfy the heat request that adds to the stock size part, also can satisfy the requirement to large-scale sheet part heating, had the advantage of wide adaptability.

The utility model is placed row's alundum tube below the resistive heater of upper strata, can support resistance wire, ruptures owing to span is excessive to prevent the upper resistors silk; Can also avoid simultaneously heated components when putting into the collision of resistance wire, the service life of raising resistance wire.

Description of drawings

Fig. 1 is the length direction sectional structure schematic diagram of electrothermal furnace in the prior art;

Fig. 2 is the width sectional structure schematic diagram of electrothermal furnace in the prior art;

Fig. 3 is the sectional structure schematic diagram of electrothermal furnace of the present utility model in length direction;

Fig. 4 is the sectional structure schematic diagram of electrothermal furnace of the present utility model in width.

Marginal data:

1, fire door; 3, heat-insulation layer; 31, light-weight insulating brick; 32, heavy refractory brick; 4, resistance wire; 41, upper resistors silk; 42, lower resistors silk; 5, carborundum plate; 6, heat-resisting steel sheet and plate; 7, shell; 8, temperature inductor; 9, support bar.

The specific embodiment

Below in conjunction with specific embodiment and accompanying drawing the utility model is further described.

As shown in Figure 3 and Figure 4, electrothermal furnace of the present utility model, comprise body of heater and resistance wire 4, body of heater is the cuboid casing, the heat-insulation layer 3 that it comprises shell 7 and is arranged at these shell 7 inwalls, on the sidewall of body of heater length direction, be provided with the fire door opening and be equiped with fire door 1, resistance wire 4 is striden along the length direction of body of heater and is established, the two end supports of resistance wire 4 on heat-insulation layer 3, even the utility model in heated components length under the situation of width, also can at short notice heated components be taken out, it is inhomogeneous to have reduced the heat radiation that is heated part, guaranteed to realize the punching press effect better that the yield rate when having improved punching press both can satisfy the heat request that adds of stock size part, also can satisfy the requirement of large-scale sheet part heating, wide adaptability has improved productivity ratio, has reduced operator's labour intensity.

Resistance wire 4 is divided into upper resistors silk 41 and lower resistors silk 42, upper resistors silk 41 is horizontally disposed in fire door 1 open upper side, two end spaies of resistance wire 4 are established the length direction of body of heater, (heating space as electrothermal furnace can reach 4m * 2m * 0.25m because the utility model is long in the longitudinal direction, heating space has increased many than heating space of the prior art), built-in resistance wire 4 spans are bigger, rupture easily during heating, therefore, for avoiding appearance fracture and heated components when putting into, to collide resistance wire 4, supported underneath at upper resistors silk 41 has row's support bar 9, these support bar 9 preferred alundum tubes, itself and upper resistors silk 41 are arranged vertically, and the two end supports of alundum tube can improve the service life of resistance wire 4 like this on heat-insulation layer 3.The quantity of support bar 9 is decided on the length of body of heater, is as the criterion to reach effective support upper resistors silk 41; Lower resistors silk 42 is horizontally disposed in fire door 1 open underside; the heat-insulation layer 3 of shell 7 inner bottom parts comprises light-weight insulating brick layer 31 and the heavy insulating brick-layer of laying successively from top to bottom 32; heavy insulating brick-layer 32 is tiled in above the light-weight insulating brick layer 31; and be laid to structure in the surface with many grooves; the quantity of groove is corresponding with the quantity of lower resistors silk 42; every resistance wire of lower resistors silk 42 places in the groove; be not damaged the purpose that prolongs its service life to reach the protective resistance silk.

Heavy insulating brick-layer 32 is provided with carborundum plate 5, carborundum plate 5 is provided with heat-resisting steel sheet and plate 6, heat-resisting steel sheet and plate 6 preferred 310S, heat-resisting steel sheet and plate 6 both can be used as the carrier of heated components, make heated components be heated evenly, the oxide layer that can prevent the heated components surface again drops on the lower resistors silk 42, influences the heating properties and the service life of resistance wire.

Between the set heat-insulation layer 3 of upper resistors silk 41 and shell 7 tops, be equipped with temperature inductor 8 between upper resistors silk 41 and the lower resistors silk 42, with the heating-up temperature in the control electrothermal furnace.

Resistance wire 4 can adopt the branch set of connections, is divided into 6 heating units as per 5 resistance wires 4 in the present embodiment altogether as a heating unit, each 3 up and down, can realize all or part of heating unit work according to the temperature needs like this.Be arranged with hanger on the furnace body outer wall, convenient transportation and handling are installed.

During actual the use, elder generation drills through 1 unthreaded hole respectively in the useless region at four angles of part to be heated, simultaneously with the operating voltage power supply of resistance wire 4 with 220 volts, realize all or part of heating unit work according to the temperature needs, after treating that electrothermal furnace is warming up to temperature required zone, put into electrothermal furnace, shut fire door with the unthreaded hole that cleek hooks on four angles of part to be heated, heat tracing was opened fire door and is gone out heated components with the cleek hook and put into mould and carry out punching press after the time of setting.This operating process can be carried out continuously.With electrothermal furnace heating of the present utility model,, amount to 6 hours times spent from beginning to be heated to 1000 ℃ of maximum heating temperature.

The above only is a preferred implementation of the present utility model, and protection domain of the present utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art, also should be considered as protection domain of the present utility model in the some improvements and modifications that do not break away under the utility model principle prerequisite.

Claims

1. electrothermal furnace, comprise body of heater and be arranged at the interior resistance wire (4) of body of heater, described body of heater is the cuboid casing, the heat-insulation layer (3) that body of heater comprises shell (7) and is arranged at this shell (7) inwall, one side of body of heater is provided with fire door (1), it is characterized in that: the opening of described fire door (1) is arranged on the sidewall of body of heater length direction, and described resistance wire (4) is striden along the length direction of body of heater and established, and the two end supports of resistance wire (4) is on described heat-insulation layer (3).

2. electrothermal furnace according to claim 1, it is characterized in that described resistance wire (4) is divided into upper resistors silk (41) and lower resistors silk (42), described upper resistors silk (41) is horizontally disposed in fire door (1) open upper side, described lower resistors silk (42) is horizontally disposed in fire door (1) open underside, the below of described upper resistors silk (41) is provided with more than one and the vertically arranged steady arm of described upper resistors silk (41) (9), and the two end supports of described steady arm (9) is on described heat-insulation layer (3).

3. electrothermal furnace according to claim 2 is characterized in that: described steady arm (9) is an alundum tube.

4. according to claim 1 or 2 or 3 described electrothermal furnaces, it is characterized in that: the described heat-insulation layer (3) of being located at shell (7) inner bottom part comprises light-weight insulating brick layer (31) and the heavy insulating brick-layer of laying successively from top to bottom (32), described heavy insulating brick-layer (32) is laid to the structure that the surface has many grooves, and described lower resistors silk (42) is placed in the described groove.

5. electrothermal furnace according to claim 4 is characterized in that: described heavy insulating brick-layer (32) is provided with carborundum plate (5).

6. electrothermal furnace according to claim 5 is characterized in that: described carborundum plate (5) is provided with heat-resisting steel sheet and plate (6).

7. electrothermal furnace according to claim 6 is characterized in that: between described upper resistors silk (41) and the set heat-insulation layer in shell (7) top (3), be equipped with temperature inductor (8) between upper resistors silk (41) and the lower resistors silk (42).