KR101630946B1 - Apparatus for heat treating with pair of straight furnaces - Google Patents

Abstract

The present invention relates to a heat treatment apparatus comprising a first rectilinear furnace and a second rectilinear furnace, each furnished with a charging end and a discharge end; An endless track passing through the first rectilinear furnace and the second rectilinear furnace; At least one bogie capable of moving along the endless track and passing through the first linear furnace and the second linear furnace, and loading the material to be processed; And a gas supply unit connected to the bogie so as to supply a gas. Therefore, unnecessary heat supply can be eliminated, heat energy can be efficiently used, and temperature deviation can be prevented. As a result, It is possible to obtain an effect of further improving the quality of the image.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat treatment apparatus having a pair of linear furnaces,

The present invention relates to a heat treatment apparatus having a pair of rectilinear furnaces, and more particularly, to a heat treatment apparatus having a pair of rectilinear furnaces which can reduce heat loss and prevent temperature variation, To a heat treatment apparatus equipped with a furnace.

It should be noted that the contents described in this section merely provide background information on the present invention and do not constitute the prior art.

For example, a heat treatment apparatus for a directional electric steel sheet is configured such that a material to be treated (for example, a coil or the like) is mounted on a base plate on a carriage running on a circular endless track and covered with a muffle, .

The furnace-shaped furnace is provided with a heating area provided with a loading door and a cooling area provided with a recovery door. In the furnace, the bogie is moved by one pitch so that the material to be treated is heated to a predetermined temperature in the heating zone and is maintained at that temperature. Next, when the material to be treated reaches the cooling region, it is cooled to a temperature lower than the other predetermined temperature.

For example, the material to be treated in the heating zone is heated by radiation through the muffle heated by the combustion gas of the flame-type burner provided in the furnace wall. For example, in the cooling region, indirect cooling is performed through the muffle while the heating by the burner is stopped or the cooling air is blown into the furnace outside the muffle to appropriately control the furnace temperature outside the muffle.

In this manner, the predetermined heat treatment is performed by passing through the heating region and the cooling region. Thereafter, the muffle is removed from the carriage so that the treated material can be guided to the next process.

However, in the curve type furnace formed in a donut shape, there is an advantage that it can circulate along the infinite orbit. However, due to the difference between the inner diameter and the outer diameter from the turning center, a region where unnecessary heat is inevitably supplied in the furnace, Zone. As a result, there is a problem that unnecessary heat loss is caused.

Moreover, since the dead zone occupies a wider area than the proximal portion (near the center of rotation) of the furnace, rather than the distal portion (farther away from the center of the turning), there is a temperature drift between the proximal and distal portions of the furnace. Such a temperature deviation causes a problem of defective shape or quality of the product.

Accordingly, it is a main object of the present invention to provide a heat treatment apparatus having a pair of linear rolls capable of reducing heat loss and preventing temperature variation to improve the quality of a product.

A heat treatment apparatus according to an embodiment of the present invention includes: a first rectilinear furnace and a second rectilinear furnace, each furnace having a charging end and a discharge end; An endless track passing through the first straight-line furnace and the second straight-line furnace; At least one bogie moving along the endless track and capable of passing through the first straight linear furnace and the second straight linear furnace, and loading the material to be processed; And a gas supply portion connected to the bogie to supply gas, wherein the gas supply portion is disposed between the first linear furnace and the second linear furnace and is rotatable about a fixed pipe communicating with the gas supply source, A moving coupler having at least one connecting tube communicating with the fixing pipe; A valve stand mounted on a mounting base extending from the bogie; And a ring header which is connected to the valve stand via the connecting pipe and is supported by the mounting base via one side, and the other side is detachably coupled to the connecting pipe in communication therewith.

As described above, according to the present invention, it is possible to eliminate an area where unnecessary heat is supplied, thereby effectively using heat energy and preventing temperature deviation, thereby ultimately obtaining the effect of further improving the quality of the product .

1 is a plan view schematically showing a heat treatment apparatus according to an embodiment of the present invention.
2 is a cross-sectional view of the heat treatment apparatus shown in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a plan view schematically showing a heat treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of the heat treatment apparatus shown in FIG.

As shown in these figures, a heat treatment apparatus according to an embodiment of the present invention includes a first linear furnace 11 and a second linear furnace 12, each furnished with a charging end 13 and a discharge end 14; An endless track 20 passing through the first rectilinear furnace 11 and the second rectilinear furnace 12; At least one bogie (not shown) that can move along the endless track 20 and pass through the first rectilinear furnace 11 and the second rectilinear furnace 12, 30); And a gas supply unit connected to the bogie 30 to supply gas.

The first rectilinear furnace 11 and the second rectilinear furnace 12 each have a heating region adjacent the charging end 13 and a cooling region adjacent the discharging end 14. The discharge end 14 of the first rectilinear furnace 11 is connected to the charging end 13 of the second rectilinear furnace 12 at a predetermined interval in parallel with the rectilinear furnaces 11, And the discharge end 14 of the second rectilinear furnace 12 are placed close to the charging end 11 of the first rectilinear furnace 11.

In the heating area inside the furnace, for example, a series of flame-type burners not shown are provided. In addition, a blower may be installed in the cooling zone. While the heating is stopped to monitor the temperature in the furnace so that the temperature is not rapidly lowered, the cooling is performed gently. In some cases, however, . In addition, by blowing the cooling air with the flow rate adjusted, it is also possible to obtain a proper heat pattern for the material to be treated.

As described above, the heat treatment apparatus according to the embodiment of the present invention can eliminate the area where unnecessary heat is supplied, compared with the conventional donut-shaped curved furnace, by using the pair of linear furnaces 11 and 12 , Heat energy can be efficiently used, and temperature variations can be prevented.

The endless track 20 is guiding means for guiding the carriage 30 and can be made up of at least one rail and circulates through the first rectilinear furnace 11 and the second rectilinear furnace 12. As shown in FIG. 2, the number of rails supporting the wheel of the carriage may be determined to be 2 or more according to the load of the material to be heat-treated. The first rectilinear furnace 11 and the second rectilinear furnace 12 are installed on the ground and the endless track 20 can be installed in the ground.

The endless track 20 includes a linear portion 21 corresponding to the first rectilinear furnace 11 and the second rectilinear furnace 12 and a rectilinear portion 21 corresponding to the discharge end portion 14 of the first rectilinear furnace 11, (22) connecting the charging end (13) of the first rectilinear furnace (12) or connecting the charging end (13) of the first rectilinear furnace (11) and the discharge end (14) of the second rectilinear furnace have. The curved portion 22 is in the form of a sector or semicircle.

The bogie 30 is provided with at least one wheel 31 rotated by an unillustrated driving means so that it can move intermittently or periodically along the endless track 20 by one pitch. The material to be treated 60 is stacked on the truck 30.

The bogie 30 is lined with a refractory material and may be provided with a muffle 32 that can cover the material to be treated 60 on the bogie 30. As the carriage 30 moves, the material to be treated 60 sequentially passes through the heating region and the cooling region and is heat-treated.

In the heating zone, the inside of the furnace is filled with the high-temperature combustion gas by the burning of the burners provided in the respective straight-type furnaces 11, 12. At this time, the material to be treated 60 can be heated to about 1200 ° C through the muffle 32 by the radiant heat from the combustion gas.

The gas supply part is located between the first linear furnace 11 and the second linear furnace 12 and can freely rotate about a fixing pipe 42 communicating with a gas supply source (not shown) A moving coupler (41) having at least one connecting pipe (43) to be connected; A valve stand (44) mounted on a mounting base (33) extending from the bogie (30); And one side of the ring header 50 is connected to the valve stand 44 via the connection pipe 51 and supported by the mounting table 33. The other side of the ring header 50 is detachably coupled to the connection pipe 43, .

The moving coupler 41 is a rotary gas supply device, which is roughly described as a connection pipe 43 rotatably installed around a fixed pipe 42 connected to a gas supply source. As the moving coupler 41, for example, an auto coupler or the like for automatically connecting the connection pipe 43 to the ring header 50 may be employed. However, the present invention is not limited thereto, and moving couplers having various structures , Or even manually operated.

1, a moving member 48 may be additionally provided at one side of the connection pipe 43 because of smooth rotation of the connection pipe 43 and maintenance of a shape without bending. This shifting member 48 may be a rolling member such as a wheel, a ball, or the like or a slidable sliding member. In addition, a curved guide member 49 for guiding the movement of the movable member 48 may be provided correspondingly, but is not limited thereto.

Referring again to FIG. 2, the valve stand 44 is mounted on a mounting stand 33 extending sideways from the truck 30, and is installed independently for each truck 30. The mounting table 33 may include at least one wheel 34 so as to be able to move intermittently or periodically by one pitch together with the respective bogie 30. Accordingly, an auxiliary trajectory 35 for guiding and supporting the mounting table 33 and the wheels 34 can be provided.

The valve stand 44 is provided with a plurality of gas supply pipes 45 for supplying an atmospheric gas so as to inject the atmospheric gas into the space formed between the bogie 30 and the muffle 32. The gas supply pipe 45 is provided with a pressure regulating valve for regulating the pressure of the atmospheric gas, a flow regulating valve for regulating the flow rate of the atmospheric gas, a switching valve for changing the type of the atmospheric gas, a mixer Can be additionally provided.

The gas supply pipe 45 extends from the valve stand 44 and extends to the space in the muffle 32 so as to pass under the bogie 30 and to blow the atmospheric gas toward the material to be treated 60.

The ring header 50 is configured to be able to move together with the carriage 30 while being supported by the mounting base 33 while communicating with the valve stand 44 via the connecting pipe 51. The ring header 50 should be able to extend straightly at the linear portion 21 of the endless track 20 while flexibly bending at the curved portion 22. To this end, the ring header 50 may be formed of a tube of a flexible material, or a plurality of single-ended single-ended tubes may be combined so as to be rotatable with respect to each other.

The ring header 50 is provided on the opposite side of the connection pipe 51 with a plurality of connection ports 52 such as a nipple for connection to the connection pipe 43 of the moving coupler 41.

Atmospheric gas is blown into the spaces formed in the carriage 30 and the muffle 32 for activation of reduction reaction, maintenance of internal pressure, purging by inert gas, and the like. As such an atmospheric gas, for example, H ₂ , N ₂ , or a mixed gas thereof may be employed and used alone or sequentially.

The atmospheric gas passes through the ring header 50 from the moving coupler 41 through the connecting pipe 43 and passes through the valve stand 44 controlled independently for each of the bogies 30 from the lower portion of the bogie 30 Is supplied to the space in the muffle (32) toward the ash (60).

Hereinafter, the operation of the heat treatment apparatus according to an embodiment of the present invention will be briefly described.

The bogie 30 is placed on the first linear furnace 11 or the second linear furnace 12 after the material to be processed 60 is loaded and the upper portion thereof is covered with the muffle 32. [ The bogie 30 is moved intermittently or periodically along the endless track 20 by one pitch.

The endless track 20 includes a linear portion 21 corresponding to the first rectilinear furnace 11 and the second rectilinear furnace 12 and a rectilinear portion 21 corresponding to the discharge end portion 14 of the first rectilinear furnace 11, The curved portion 22 connecting the charging end 13 of the second rectilinear furnace 12 and the charging end 14 of the second rectilinear furnace 12 and the charging end 13 of the first rectilinear furnace 11 And a curved portion 22 for connecting.

The bogie 30 moves along the linear portion 21 of the endless track 20 to cause the material to be processed 60 to be heat treated in the first linear furnace 11 or the second linear furnace 12. The bogie 30 having undergone the heat treatment of the material to be treated 60 is then discharged from the first linear furnace 11 or the second linear furnace 12 and brought close to the curved portion 22 of the endless track 20 do. During the movement of the carriage 30 along the curved portion 22, the heat treated material to be treated 60 is lowered from the carriage 30 and a new material to be heat treated 60 is loaded.

As shown in the drawing, a moving coupler 41 connected to a gas supply source is located near each curved portion 22 of the endless track 20, more specifically, at the center of curvature of each curved portion 22. The connecting pipe 43 of the moving coupler 41 is coupled to the connecting port 52 of the ring header 50 at a position corresponding to one end of the curved portion 22, ) At the same speed as the revolution speed of the engine. The connection pipe 43 of the moving coupler 41 rotates together with the ring header 50 and the carriage 30 and then reaches the other end of the curved portion 22,

The connecting pipe 43 is continuously rotated in the reverse direction of the moving direction of the carriage 30 or in the moving direction of the carriage 30 without being coupled with the ring header, That is, the position where the curved portion 22 starts.

The coupling pipe 43 of the moving coupler 41 on the opposite side of the curved portion 22 opposite to the curved portion 22 is coupled to one of the coupling holes 52 of the ring header 50, Therefore, the gas supply to the ring header 50 can be maintained constantly.

The ring header 50 connected to the moving coupler 20 continuously supplies the atmospheric gas into the space formed between the bogie 30 and the muffle 32 through the respective valve stands 44. [ The ring header 50 is supported by a mounting base 33 extending from the bogie 30 while communicating with the valve stand 44 and moves in conjunction with the movement of the bogie 30.

Thus, the endless track 20 is installed in a substantially elliptic shape, and the curved portions 22 are located at both ends of the pair of linear grooves 11, 12, respectively, and the center of curvature of each curved portion 22 The moving coupler 41 connected to the gas supply source is positioned so that the connecting pipe 43 of both the moving couplers 41 is alternately attached to and detached from the ring header 50 so that the atmospheric gas is continuously supplied to the ring header 50 .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

11: first rectilinear furnace 12: second rectilinear furnace
20: infinite orbit 30: lane
41: Moving coupler 44: Valve stand
50: ring header

Claims (9)

A first rectilinear furnace and a second rectilinear furnace, each furnished with a charging end and a discharge end;
An endless track passing through the first straight-line furnace and the second straight-line furnace;
At least one bogie moving along the endless track and capable of passing through the first straight linear furnace and the second straight linear furnace, and loading the material to be processed; And
And a gas supply unit
Lt; / RTI >
The gas-
A moving coupler located between said first linear furnace and said second linear furnace, said moving coupler having at least one connecting tube rotatable about a fixed tube communicating with a gas supply source and communicating with said fixed tube;
A valve stand mounted on a mounting base extending from the bogie; And
And the other side is connected to the valve stand via the connecting tube and is supported by the mounting table, and the other side is connected to the ring header
/ RTI > The method according to claim 1,
Wherein the endless track includes:
A straight line portion corresponding to the first rectilinear furnace and the second rectilinear furnace; And
A curved portion connecting a discharge end of the first linear furnace to a charging end of the second linear furnace or connecting a discharge end of the second linear furnace to a charging end of the first linear furnace;
Wherein the heat treatment apparatus comprises: delete The method according to claim 1,
And a moving member is further provided on one side of the connecting pipe. 5. The method of claim 4,
And a curved guide member for guiding the movement of the movable member is provided. The method according to claim 1,
Wherein the moving coupler is located at the center of curvature of the curved portion of the endless track. The method according to claim 1,
Wherein the endless track is installed in an elliptic shape,
Wherein the moving coupler is positioned near the curved portions of the elliptical shape so that the coupling pipes of the moving couplers of both the moving couplers are alternately attached to and detached from the ring header. 8. The method of claim 7,
Wherein the ring header extends straightly at the linear portion of the endless track and can be bent at the curved portion. 3. The method of claim 2,
Wherein the heat treated material to be treated is lowered from the bogie while the bogie moves along the curved portion, and a new material to be heat treated is loaded on the bogie.

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