KR101237072B1 - Heating furnace - Google Patents

Abstract

The present invention relates to a heating furnace, wherein an extraction hole for extracting a material is provided at the extraction end, an extraction door for opening and closing the extraction hole, an extraction door driver for moving the extraction door up and down, and an extraction force provided at the extraction end. It characterized in that it comprises a control unit for controlling the operation of the extraction door driving unit and the close contact guide portion to draw the extraction door to the extraction end side.
According to the present invention, energy loss can be suppressed by minimizing the gap between the extraction door and the extraction stage, thereby minimizing fuel consumption.

Description

Heater {HEATING FURNACE}

The present invention relates to a heating furnace, and more particularly, to a heating furnace capable of suppressing energy loss by minimizing the gap between the extraction door and the extraction stage.

Generally, a heating furnace is a device for heating a material such as a slab at a hot rolling mill in a steel mill at a suitable temperature of about 1200 to 1300 ° C using fuel such as gas or oil, The hot-rolling process is performed.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

It is an object of the present invention to provide a heating furnace which can suppress energy loss by minimizing the gap between the extraction door and the extraction stage.

Furnace according to an embodiment of the present invention: the body is provided in the extraction hole extraction portion extraction portion; An extraction door for opening and closing the extraction hole; An extraction door driver for moving the extraction door up and down; An adhesion guide unit provided at the extraction end and generating suction force to pull the extraction door toward the extraction end; And a control unit for controlling the operation of the extraction door drive unit and the close contact guide.

Preferably, the close contact guide portion closes the extraction door to the extraction end when the extraction door is opened or closed.

More preferably, the close contact guide portion separates the extraction door from the extraction stage during the vertical movement of the extraction door.

More preferably, the close contact portion, the suction portion exposed to the outside of the extraction end so as to face the extraction door, the suction portion to generate a suction force for pulling the extraction door toward the extraction end side by sucking air; And a movement guide part providing an elastic force to separate the extraction door from the extraction end.

More preferably, the suction unit, the suction pipe exposed to the outside of the extraction end to face the extraction door; A case connected to the suction pipe and having a fan rotatably installed therein; A drive motor for rotating the fan; And a discharge pipe connected to the case and discharging air introduced through the suction pipe to the outside.

More preferably, the movement guide portion, the housing portion; A bearing part disposed in the housing part to guide the vertical movement of the extraction door in contact with the extraction door; One side is coupled to the housing portion, the other side includes a spring portion for elastically supporting the bearing portion.

More preferably, the movement guide part is provided in the bearing part, and further includes a stopper part which is caught on one side of the housing part so that the bearing part is not separated from the housing part.

More preferably, the adhesion guide portion is provided in plurality in a row in the transverse direction in the extraction end.

More preferably, the adhesion guide portion is provided in plurality in a row in the longitudinal direction at the extraction end.

According to the present invention, energy loss can be suppressed by minimizing the gap between the extraction door and the extraction stage, thereby minimizing fuel consumption.

According to the present invention, the extraction door may be in close contact with the extraction stage when the extraction door is opened or closed, thereby preventing the inflow of external air or leakage of internal heat through the gap between the extraction door and the extraction stage.

Further, according to the present invention, the extraction door and the extraction stage is at least spaced apart at the time of vertical movement of the extraction door, so that the vertical movement of the extraction door can be made smoothly, and at the same time the inflow of outside air through the gap between the extraction door and the extraction stage or The leakage of internal heat can be minimized.

1 is a schematic view of a heating furnace according to an embodiment of the present invention.
2 is a view schematically showing a furnace and an extractor according to an embodiment of the present invention.
Figure 3 is an enlarged view of the extraction end side of the heating furnace according to an embodiment of the present invention.
4 is a view showing a state in which the extraction door of the heating furnace according to an embodiment of the present invention is opened.
5 is a view showing a state in which the extractor enters the heating furnace according to an embodiment of the present invention.
6 is a view showing a state in which the extractor lifts the material in the heating furnace according to an embodiment of the present invention.
7 is a view showing a state in which the extraction door is closed by the extractor withdrawal in the heating furnace according to an embodiment of the present invention.
8 is a view showing a state in which the extractor lowers the material to the feed roller in the heating furnace according to an embodiment of the present invention.
9 is a view showing the relationship between the skid beam and the extractor in the heating furnace according to an embodiment of the present invention.
10 is a view showing a state of the close contact portion when opening or closing the extraction door in the heating furnace according to an embodiment of the present invention.
11 is a view showing a state of the close contact portion when the vertical movement of the extraction door in the heating furnace according to an embodiment of the present invention.
12 is a view showing a state in which the close contact guide portion is installed in the extraction stage in the heating furnace according to an embodiment of the present invention.
13 is a view schematically showing a suction unit in a heating furnace according to an embodiment of the present invention.

Hereinafter, an embodiment of a heating furnace according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Further, terms to be described below are defined in consideration of the functions of the present invention, which may vary according to the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a view schematically showing a heating furnace according to an embodiment of the present invention, Figure 2 is a view schematically showing a heating furnace and an extractor according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is the figure which expanded the extraction end side of the heating furnace which concerns on an example. Figure 4 is a view showing a state in which the extraction door of the heating furnace open according to an embodiment of the present invention, Figure 5 is a view showing a state in which the extractor enters the heating furnace according to an embodiment of the present invention, 6 is a view showing a state in which the extractor lifts the material in the heating furnace according to an embodiment of the present invention, Figure 7 is a state in which the extraction door is removed from the heating furnace according to an embodiment of the present invention is closed the extraction door 8 is a view showing a state in which the extractor lowers the material to the feed roller in the heating furnace according to an embodiment of the present invention. 9 is a view showing the relationship between the skid beam and the extractor in the heating furnace according to an embodiment of the present invention, Figure 10 is a state of the close contact portion when opening or closing the extraction door in the heating furnace according to an embodiment of the present invention 11 is a view showing a state of the close contact portion in the vertical movement of the extraction door in the heating furnace according to an embodiment of the present invention, Figure 12 is a close contact guide portion in the heating furnace according to an embodiment of the present invention Is a view showing a state installed in the extraction stage, Figure 13 is a view schematically showing a suction unit in the heating furnace according to an embodiment of the present invention.

1 to 3, the heating furnace 1 according to an embodiment of the present invention includes a body 10, an extraction door 20, an extraction door driving unit 30, a control unit 40, and an adhesion induction unit 100. )

The body 10 has a charging hole portion 16 for charging the work S and an extraction hole portion 11 for extracting the work S therefrom. The loading and unloading portion 16 is opened and closed by the loading door 17. [

The body 10 is provided with a skid beam 15 on which the material S to be heated is placed and transported. The skid beam 15 is mainly composed of a fixed beam for supporting the work S and a working beam for advancing the work S.

The working beam is moved gradually from the charging hole portion 16 side to the extraction hole portion 11 side by gradually raising, advancing, lowering, and moving back the material S while heating the material S in the heating furnace 1, .

The body 10 is divided into a preliminary stage 2, a heating base 3 and a crack base 4 along the direction in which the skid beam 15 passes. The temperature rise rate and residence time in the preheating zone 2, the heating zone 3, and the residence time in the crack zone 4 are controlled depending on the initial temperature of the material S and the final temperature required for the extraction . The burner B for heating the material S is provided in the heat exchanger 2, the heating stand 3 and the crack base 4, respectively.

The extraction door 20 is slidably installed on the extraction end 12 of the body 10 to open and close the extraction hole 11. The extraction door 20 is moved upward when the material S is extracted to the outside from the body 10 to open the extraction hole 11 and after the material S is extracted, (11) is closed. As a result, the outside air is introduced into the body 10 and the heat inside the body 10 is suppressed from leaking to the outside.

The extracting door driving unit 30 moves the extracting door 20 upward or downward. The extraction door 20 is moved upward or downward by the operation of the extraction door driving section 30 to open or close the extraction hole section 11. [

In this embodiment, the extraction door driving unit 30 includes a chain unit connected to the extraction door 20 and a motor unit for providing power to the chain unit. Since the extraction door driving unit 30 is a technical content that can be readily implemented by those skilled in the art, a detailed description and drawings of the extraction door driving unit 30 will be omitted.

3 and 10 to 13, the adhesion guide unit 100 is provided inside the extraction stage 12 to face the extraction door 20. The close contact guide unit 100 generates a suction force and pulls the extraction door 20 toward the extraction end 12. As a result, the gap between the extraction door 20 and the extraction stage 12 can be minimized, and energy loss through the gap can be suppressed.

The close induction part 100 includes a suction part 110 for generating a suction force and a movement guide part 120 for providing an elastic force.

The suction unit 110 includes a suction pipe 111, a fan 112, a case 113, a driving motor 114, and a discharge pipe 115. The suction pipe 111 is disposed to face the extraction door 20 by being exposed to the outside of the extraction end 12.

The case 113 is connected to the suction pipe 111, and the fan 112 is rotatably installed therein. The fan 112 is rotated by receiving power from the driving motor 114. As the outside air flows into the case 113 through the suction pipe 111 by the rotation of the fan 112, a suction force is generated on the suction pipe 111 side. The air introduced into the case 113 is discharged to the outside through the discharge pipe 115 connected to the case 113.

The strength of the suction force is proportional to the rotation speed of the fan 112. If the rotation speed of the fan 112 is faster, the strength of the suction force is increased accordingly, and if the rotation speed of the fan 112 is slow, the strength of the suction force is also reduced. Since the rotational speed of the fan 112 depends on the drive speed of the drive motor 114, the adjustment of the suction force intensity can be achieved by adjusting the drive speed of the drive motor 114.

When the suction force is generated in the suction unit 110 by the operation of the drive motor 114, the extraction door 20 is attracted to the extraction end 12 side, that is, the suction unit 110 side.

The controller 40 adjusts the driving speed of the driving motor 114 to adjust the strength of the suction force generated in the suction pipe 111. When the extraction door 20 is to be in close contact with the extraction stage 12 as shown in FIG. 10, the driving speed of the driving motor 114 is increased at high speed to increase the strength of the suction force, and the extraction door 20 as shown in FIG. 11. In the case where it is to be spaced apart from the extraction stage 12 by a predetermined distance, the driving speed of the driving motor 114 is made relatively low to reduce the strength of the suction force. In this case, the strength of the suction force provided in the case of close contact or separation can be obtained by experiment or the like.

The movement guide part 120 includes a housing part 121, a bearing part 122, a spring part 123, and a stopper part 124.

The housing part 121 forms an outer shape of the movement guide part 120 and is provided in the extraction end 12. The suction part 110 is coupled to the housing part 121 to form an integrated module with the movement guide part 120. In the present exemplary embodiment, the suction unit 110 is illustrated as having a pair provided at the upper side and the lower side of the housing unit 121, but is not limited thereto.

The bearing part 122 is disposed in the inner space of the housing part 121. The bearing part 122 is mounted to the housing part 121 to be movable in the left and right directions (refer to FIG. 10).

The bearing portion 122 includes a bearing 122a that contacts the extraction door 20 to guide the vertical movement of the extraction door 20, and a bearing housing 122b that supports the bearing 122a. Since the extraction door 20 moves up and down while contacting the rotatable bearing 122a, the extraction door 20 can reduce the friction force generated during the movement and suppress the shaking. As a result, driving force required for vertical movement of the extraction door 20 can be reduced, and operation accuracy can be improved.

One side of the spring portion 123 is coupled to the inner surface of the housing portion 121, the other side is coupled to the bearing housing 122b to elastically support the bearing housing 122b.

Since the bearing part 122 is elastically supported by the spring part 123, when an external force is applied from the left side (see FIG. 10), the bearing part 122 is moved to the right side while compressing the spring part 123 (FIG. 10).

On the other hand, when the external force is removed, the bearing portion 122 is moved to the left side by the elastic force of the spring portion 123 and returned to its original position (FIG. 11). Of course, even if the external force is smaller than the elastic force, the bearing portion 122 is returned to its original position.

As such, when an elastic force is provided to the bearing part 122, the bearing part 122 may separate the extraction door 20 from the extraction end 12.

The stopper part 124 is provided on the outer side of the bearing part 122, specifically, the bearing housing 122b. The stopper part 124 is formed to protrude in a direction perpendicular to the outer surface of the bearing housing 122b so that the bearing part 122 is separated from the housing part 121 when the bearing part 122 moves to the left side as shown in FIG. 11. Do not

That is, the stopper part 124 is caught by the latching jaw 121a formed on the inner surface of the housing part 121 and the movement in the left direction is restricted so that the stopper part 124 is not separated from the housing part 121.

The close contact guide part 100 may be provided in a plurality in the horizontal direction in the extraction stage 12 in order to move the extraction door 20 without shaking when the extraction door 20 moves up and down, and a plurality in a row in the vertical direction May be provided. In addition, if it can achieve a stable movement of the extraction door 20 can be replaced with another arrangement form, of course.

The controller 40 controls the operation of the extraction door driver 30 to open or close the extraction hole 11 through the extraction door 20.

The control unit 40 controls the operation of the adhesion induction unit 100. The control unit 40 controls the close contact guide unit 100 so that the extraction door 20 is in close contact with the extraction end 12 when the extraction door 20 is opened or closed (FIG. 10). As a result, it is possible to suppress the loss of energy through the gap between the extraction door 20 and the extraction stage 12 in the open or closed state of the extraction door 20.

The controller 40 controls the close contact guide unit 100 such that the extraction door 20 is spaced apart from the extraction end 12 by a predetermined distance when the extraction door 20 moves up and down. Through the separation of the extraction door 20 and the extraction end 12 it is possible to block the generation of frictional force due to contact between the extraction door 20 and the extraction end 12 during the vertical movement of the extraction door 20. In this case, the extraction door 20 is positioned closest to the extraction stage 12 in a range where contact friction is not generated so that energy loss through the gap between the extraction door 20 and the extraction stage 12 is minimized (FIG. 11). .

2 and 9, in the present embodiment, the extractor 60 includes an up-and-down drive part 61, a front and rear drive part 62, and an extraction stand 63. The up-and-down drive part 61 moves the extraction stand 63 to the upper side or the lower side, and the front-back drive part 62 moves the extraction stand 63 to the front side or the rear side. Extraction stand 63 is formed in the shape of a hook can lift the material (S) located in the skid beam 15 without contacting the skid beam 15. Since the extractor 60 is a technical configuration apparent to those skilled in the art, detailed descriptions and drawings will be omitted.

4 to 8 will be described a process of extracting the material in the heating furnace according to an embodiment of the present invention.

When the operation of the extractor 60 is started, the extraction door 20 is moved upward to open the extraction hole 11 (Fig. 4). The extractor 60 enters into the body 10 through the open extraction hole 11 (FIG. 5). Extraction table 63 entered into the heating furnace 1 is moved upwards to lift the material (S) (Fig. 6), and then the extraction table 63 is evaporated outside the body (10) material (S) Is extracted outside the furnace 1. At this time, the control unit 40 operates the extraction door driver 30 to close the extraction hole 11 with the extraction door 20 (FIG. 7). The raw material S extracted to the outside by the extraction table 63 is seated on the feed roller R and then transferred to the post process (FIG. 8).

Referring to Figures 3, 10 to 13 will be described the operation of the heating center around the operation of the close contact guide portion according to an embodiment of the present invention.

When the extraction door 20 is in an open state (FIG. 4) or a closed state (FIG. 2), external air flows into the body 10 through a gap between the extraction door 20 and the extraction end 12. As heat inside the body 10 leaks to the outside, energy loss may occur.

At this time, the control unit 40 controls the operation of the close induction unit 100 so that the extraction door 20 is in close contact with the extraction stage 12 to block the energy loss through the gap between the extraction door 20 and the extraction stage 12. (FIG. 10).

The close contact guide part 100 is a suction part 110 generating a suction force that pulls the extraction door 20 toward the extraction end 12, and a movement that provides an elastic force that separates the extraction door 20 from the extraction end 12. The guide part 120 is provided.

The control unit 40 drives the driving speed of the driving motor 114 to have a larger suction force that brings the extraction door 20 and the extraction end 12 closer than an elastic force that separates the extraction door 20 and the extraction end 12. Adjust As a result, the extraction door 20 overcomes the elastic force provided by the spring part 123 and moves toward the suction part 110 to be in close contact with the extraction end 12.

When the extraction door 20 moves upward in the closed state or when moving downward in the open state, the control unit 40 controls the operation of the close contact guide unit 100 so that the extraction door 20 has the extraction end ( 12) to be spaced apart from the predetermined distance.

If the extraction door 20 and the extraction stage 12 are in close contact with each other, the friction force that prevents the vertical movement of the extraction door 20 between the extraction door 20 and the extraction stage 12 when the extraction door 20 moves up and down. Since this occurs, the extraction door 20 and the extraction stage 12 is spaced a predetermined distance to remove this. Thereby, the vertical movement of the extraction door 20 can be achieved smoothly.

The control unit 40 drives the driving speed of the driving motor 114 to have a smaller suction force that brings the extraction door 20 and the extraction end 12 closer than an elastic force that separates the extraction door 20 and the extraction end 12. Adjust At this time, the driving speed of the driving motor 114 is slower than when the extraction door 20 is to be in close contact with the extraction end 12. As a result, the bearing part 122 spaces the extraction door 20 from the extraction end 12 while pressing the extraction door 20 to the left side (see FIG. 11). At this time, the separation distance between the extraction door 20 and the extraction end 12 is adjusted according to the degree of protrusion of the bearing portion 122, the degree of protrusion of the bearing portion 122 is a locking step provided on the inner side of the housing portion 121 It can be adjusted by the position of (121a).

Meanwhile, even when the extraction door 20 moves up and down, the extraction door 20 does not generate contact friction with the extraction stage 12 so that energy loss through the gap between the extraction door 20 and the extraction stage 12 is minimized. It is located nearest to each other within a range (Fig. 11).

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and equivalent other embodiments are possible. will be.

In addition, the heating furnace has been described as an example, but this is merely exemplary, and the technical spirit of the present invention may be applied to other devices than the heating furnace. Accordingly, the true scope of the present invention should be determined by the following claims.

1: heating furnace 10: body
11: extraction hole 12: extraction stage
20: extraction door 30: extraction door driving unit
40: control unit 100: adhesion induction part
110: suction unit 120: movement guide unit

Claims (9)

A body provided with an extraction hole for extracting the material from the extraction end;
An extraction door for opening and closing the extraction hole;
An extraction door driver for moving the extraction door up and down;
An adhesion guide unit provided at the extraction end and generating suction force to pull the extraction door toward the extraction end; And
It includes a control unit for controlling the operation of the extraction door driving unit and the close contact,
The close contact portion, the suction portion is exposed to the outside of the extraction stage to face the extraction door, the suction portion to generate a suction force for pulling the extraction door toward the extraction end by suctioning air; And
And a movement guide part for providing an elastic force to separate the extraction door from the extraction end.
The method of claim 1,
The adhesion induction part is a heating furnace, characterized in that the extraction door in close contact with the extraction stage when the opening or closing of the extraction door.
The method of claim 2,
The close contact guide portion is a heating furnace, characterized in that for separating the extraction door from the extraction stage during the vertical movement of the extraction door.
delete The method of claim 1,
The suction unit, the suction pipe exposed to the outside of the extraction end to face the extraction door;
A case connected to the suction pipe and having a fan rotatably installed therein;
A drive motor for rotating the fan; And
And a discharge pipe connected to the case and discharging air introduced through the suction pipe to the outside.
The method of claim 1,
The movement guide portion, the housing portion;
A bearing part disposed in the housing part to guide the vertical movement of the extraction door in contact with the extraction door;
One side is coupled to the housing portion, the other side is a heating furnace, characterized in that it comprises a spring portion for elastically supporting the bearing portion.
The method according to claim 6,
The moving guide part is provided in the bearing part, the heating furnace further comprises a stopper part which is caught on one side of the housing part so that the bearing part is not separated from the housing part.
The method of claim 1,
The adhesion guide portion is a heating furnace, characterized in that the plurality of extraction stages are provided in a row in a horizontal direction.
The method of claim 1,
The adhesion induction part is a heating furnace, characterized in that a plurality is provided in a row in the longitudinal direction in the extraction end.

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