KR101246261B1 - Heating furnace having lower door and control method thereof - Google Patents

Abstract

The present invention relates to a furnace apparatus having a lower door and a control method thereof, comprising: a body having an extraction hole for extracting material, an upper door and a lower door for opening and closing an extraction hole, and an upper door for vertically moving the upper door. A drive unit, a lower door driver for moving the lower door up and down, and a control unit for controlling the operation of the upper door driver and the lower door driver, the body is provided with a displacement sensor for detecting the presence of the material, the displacement sensor is a detection signal Is transmitted to the controller, and the controller controls the operation of the lower door driver based on the detection signal.
According to the present invention it is possible to adjust the opening and closing width of the lower door according to the width of the material while extracting the material in the heating apparatus through the extractor to suppress the energy loss and to minimize the fuel consumption.

Description

Heating furnace apparatus with lower door and its control method {HEATING FURNACE HAVING LOWER DOOR AND CONTROL METHOD THEREOF}

The present invention relates to a furnace apparatus, and more particularly, to a furnace apparatus having a lower door capable of suppressing energy loss during extraction of material in the furnace apparatus through an extractor and a control method thereof.

In general, a furnace apparatus is a device for heating a material such as slab at an appropriate temperature of approximately 1200 to 1300 ° C. using a gas, oil, or the like in a hot rolling mill of a steel mill. It is placed in the whole process of hot rolling process for processing.

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.

SUMMARY OF THE INVENTION An object of the present invention is to provide a furnace apparatus and a control method thereof having a lower door capable of suppressing energy loss during extraction of material in the furnace apparatus through an extractor.

Furnace apparatus having a lower door according to the present invention comprises: a body having an extraction hole for extracting the material; An upper door and a lower door that open and close the extraction hole; An upper door driving unit which vertically moves the upper door; A lower door driver for moving the lower door up and down; And a control unit controlling an operation of the upper door driving unit and the lower door driving unit, and the body includes a displacement sensor for detecting the presence of the material, and the displacement sensor transmits a detection signal to the control unit. The control unit controls the operation of the lower door driver based on the detection signal.

Preferably, the lower door is a central lower door; A first auxiliary lower door disposed at one side of the central lower door; And a second auxiliary lower door disposed at the other side of the central lower door, wherein the lower door driving unit comprises: a central lower door driving unit which vertically moves the central lower door; A first auxiliary lower door driving unit which vertically moves the first auxiliary lower door; And a second auxiliary lower door driving part for moving the second auxiliary lower door up and down, wherein the control part individually operates the central lower door driving part, the first auxiliary lower door driving part, and the second auxiliary lower door driving part. To control.

More preferably, the displacement sensor comprises: a first displacement sensor disposed on the extraction path through the first auxiliary lower door; And a second displacement sensor disposed on the extraction path through the second auxiliary lower door.

More preferably, when the presence of the material is detected by the first displacement sensor, the control unit operates the first auxiliary lower door driver to open the first auxiliary lower door, and the second displacement sensor When the presence is detected, the second sub lower door driving part is operated to open the second sub lower door.

Preferably, the body is provided with a cooling unit for cooling the displacement sensor.

A control method of a furnace apparatus having a lower door according to the present invention includes: detecting whether a material is located on an extraction path through a first auxiliary lower door; And detecting whether the material is located on the extraction path through the second auxiliary lower door.

Preferably, further comprising the step of opening the first secondary lower door when the material is located on the extraction path through the first secondary lower door.

More preferably, the method further comprises closing the first secondary lower door when the material is not located on the extraction path through the first secondary lower door.

Preferably, the method further comprises opening the second sub lower door when the material is located on the extraction path through the second sub lower door.

More preferably, the method further comprises closing the second sub lower door when the material is not located on the extraction path through the second sub lower door.

According to the present invention it is possible to adjust the opening and closing width of the lower door according to the width of the material while extracting the material in the heating apparatus through the extractor to suppress the energy loss and to minimize the fuel consumption.

1 is a view schematically showing a furnace apparatus according to an embodiment of the present invention.
2 is a view showing the extraction hole side of the heating apparatus according to an embodiment of the present invention.
3 is a view showing the upper door and the lower door in the furnace apparatus according to an embodiment of the present invention.
Figure 4 is a block diagram showing the control flow of the heating apparatus according to an embodiment of the present invention.
5 is a view showing a state in which the central lower door is opened in the heating apparatus according to an embodiment of the present invention.
6 is a view showing a state in which the central lower door and the first auxiliary lower door is opened in the heating apparatus according to an embodiment of the present invention.
7 is a view showing a state in which the central lower door and the second auxiliary lower door is opened in the heating apparatus according to an embodiment of the present invention.
8 is a view showing a state in which the entire lower door is open in the heating apparatus according to an embodiment of the present invention.
9 is a view showing a state in which the entire lower door is closed by moving upward in the heating apparatus according to an embodiment of the present invention.
10 is a flowchart illustrating a control method of a heating apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of a heating apparatus having a lower door and a control method thereof 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 furnace apparatus according to an embodiment of the present invention, Figure 2 is a view showing the extraction hole side of the furnace apparatus according to an embodiment of the present invention. 3 is a view showing the upper door and the lower door in the heating apparatus according to an embodiment of the present invention, Figure 4 is a block diagram showing the control flow of the heating apparatus according to an embodiment of the present invention. 5 is a view showing a state in which the central lower door is opened in the heating apparatus according to an embodiment of the present invention, Figure 6 is a central lower door and the first auxiliary lower in the heating apparatus according to an embodiment of the present invention. 7 is a view showing a state in which the door is opened, Figure 7 is a view showing a state in which the central lower door and the second auxiliary lower door is opened in the heating apparatus according to an embodiment of the present invention, Figure 8 is a view of the present invention 9 is a view illustrating a state in which the entire lower door is opened in the heating apparatus according to the embodiment, and FIG. 9 is a view illustrating the state in which the entire lower door is moved upward and closed in the heating apparatus according to an embodiment of the present invention. . 10 is a flowchart illustrating a control method of a heating apparatus according to an embodiment of the present invention.

1 to 3, the furnace apparatus 1 according to an embodiment of the present invention includes a body 10, an upper door 20, a lower door 120, an upper door driving unit 30, and a lower door. It includes a drive unit 130, the control unit 40.

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 walking beam gradually advances the material S from the charging hole part 16 to the extraction hole part 11 by raising, advancing, lowering and reversing the material S while the material S is heated in the furnace apparatus 1. Transfer to.

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.

1 to 4, the upper door 20 and the lower door 120 are installed to be slidably movable in the body 10 to open and close the extraction hole 11.

The upper door 20 is moved upward when the material S is extracted from the body 10 to open the extraction hole 11, and after the extraction of the material S, the upper door 20 is moved downward to extract the hole. (11) is closed.

The lower door 120 is adjusted to the opening and closing width according to the width of the material (S). As a result, when the material S is extracted, the outside air is introduced into the body 10 and the heat inside the body 10 is suppressed from leaking to the outside.

Lower door 120 is divided into a plurality. In this embodiment, the lower door 120 includes a central lower door 121, a first auxiliary lower door 122, and a second auxiliary lower door 123.

The central lower door 121 is located at the center and serves as a main lower door that is basically opened when the material S is extracted.

The first auxiliary lower door 122 is disposed on the left side (see FIG. 3) of the central lower door 121, and the material S to be extracted is located on the extraction path through the first auxiliary lower door 122. Open. If the material (S) is not located on the upper extraction path is closed to suppress the inflow of air or leakage of heat.

The second auxiliary lower door 123 is disposed on the right side (see FIG. 3) of the central lower door 121 and the material S to be extracted is located on the extraction path through the second auxiliary lower door 123. Open. If the material (S) is not located on the upper extraction path is closed to suppress the inflow of air or leakage of heat.

The upper door driver 30 moves the upper door 20 upward or downward. The upper door 20 moves upward or downward by the operation of the upper door driving part 30 to open or close the extraction hole 11.

In the present embodiment, the upper door driving part 30 includes a chain part connected to the upper door 20 and a motor part providing power to the chain part. Since the upper door driver 30 can be easily implemented by those skilled in the art, detailed descriptions and drawings of the upper door driver 30 will be omitted.

The lower door driver 130 moves the lower door 120 upward or downward. The lower door 120 is moved upward or downward by the operation of the lower door driver 130 to open or close the extraction hole 11.

In the present embodiment, the lower door driving unit 130 includes a rack connected to the lower door 120, a pinion engaged with the rack, and a motor unit providing power to the pinion. As the pinion is rotated by the operation of the motor unit, the rack moves up and down, so that the lower door 120 connected to the rack is also moved up and down. In addition, the lower door driving unit 130 may be manufactured in a hydraulic cylinder type, and if the lower door 120 can be moved up and down, of course, it may be replaced with another technical configuration.

The lower door driver 130 is provided in plurality in accordance with the lower door 120 divided into a plurality. In the present embodiment, the lower door driver 130 includes a central lower door driver 131, a first auxiliary lower door driver 132, and a second auxiliary lower door driver 133.

The central lower door driver 131 is installed on the body 10 to move the central lower door 121 up and down. The first auxiliary lower door driving unit 132 and the second auxiliary lower door driving unit 133 are also installed in the body 10 to move the first auxiliary lower door 122 and the second auxiliary lower door 123 up and down, respectively.

The body 10 is provided with a displacement sensor 12 and the cooling unit 13.

Displacement sensor 12 is installed on the extraction hole 11 in the inner space of the body 10 to detect the presence of the material (S), and transmits the measured detection signal to the controller 40.

In this embodiment, the displacement sensor 12 is illustrated as being a laser displacement sensor. The displacement sensor 12 detects the presence of the object by irradiating toward the lower side of the displacement sensor 12 and receiving a laser reflected from the surface of the object. As a result, it is possible to detect in real time whether the object, that is, the material S, is present under the displacement sensor 12.

The displacement sensor 12 uses a green laser method so as to contrast with a material S, which is mostly red. Green laser refers to a gas laser using helium and selenium to generate a 522.8 nm green wire.

The displacement sensor 12 includes a first displacement sensor 12a and a second displacement sensor 12b.

The first displacement sensor 12a is disposed on the extraction path through the first auxiliary lower door 122. The first displacement sensor 12a irradiates the laser toward the lower side, and detects the presence or absence of the material S through the reflection of the laser.

When the material S is located on the extraction path through the first auxiliary lower door 122, the first displacement sensor 12a detects this and transmits a detection signal indicating the presence of the material S to the controller 40. do. On the contrary, when the material S is not located on the extraction path through the first auxiliary lower door 122, the first displacement sensor 12a transmits a detection signal indicating the absence of the material S to the controller 40. .

The second displacement sensor 12b is disposed on the extraction path through the second auxiliary lower door 123. The second displacement sensor 12b irradiates the laser toward the lower side, and detects the presence or absence of the material S through the reflection of the laser.

When the material S is located on the extraction path through the second auxiliary lower door 123, the second displacement sensor 12b detects this and transmits a detection signal indicating the presence of the material S to the controller 40. do. On the contrary, when the material S is not located on the extraction path through the second auxiliary lower door 123, the second displacement sensor 12b transmits a detection signal indicating the absence of the material S to the controller 40. .

The cooling unit 13 is disposed to surround the displacement sensor 12 to cool the displacement sensor 12. Since the displacement sensor 12 is used in a high temperature environment, even if it is formed of a material having heat resistance, deterioration damage may occur when used for a long time. Therefore, the cooling unit 13 is provided to prevent this in advance.

The cooling unit 13 may be configured as a circulation type for continuously supplying and discharging the cooling water supplied from the outside, or may be configured as an attachment type for attaching the refrigerant for a certain period of time.

The controller 40 controls the operation of the upper door driver 30 and the lower door driver 130. The controller 40 adjusts the opening and closing width of the lower door 120 in accordance with the width of the material (S) to suppress the energy loss during the extraction of the material (S). To this end, the control unit 40 individually controls the operations of the central lower door driving unit 131, the first auxiliary lower door driving unit 132, and the second auxiliary lower door driving unit 133.

That is, when the center lower door 121 needs to be opened, the control unit 40 operates the center lower door driving unit 131 to open the center lower door 121, and the opening of the first auxiliary lower door 122 is performed. If necessary, the first auxiliary lower door driving part 132 is operated to open the first auxiliary lower door 122, and when the second auxiliary lower door 123 needs to be opened, the second auxiliary lower door driving part 133 is required. To operate the second auxiliary lower door 123 to be opened.

The controller 40 controls the operation of the lower door driver 130 based on the detection signal transmitted from the displacement sensor 12.

Specifically, the control unit 40 operates the first auxiliary lower door driver 132 to open the first auxiliary lower door 122 when the presence of the material S is detected by the first displacement sensor 12a. When the presence of the raw material S is detected by the second displacement sensor 12b, the second auxiliary lower door driver 133 is operated to open the second auxiliary lower door 123.

Therefore, according to the present embodiment, only the lower door 120, which is necessary for preventing the collision between the material S and the lower door 120, is opened when the material S is extracted, thereby minimizing energy loss through the extraction hole 11. You can do it.

A control method of the furnace apparatus according to an embodiment of the present invention will be described with reference to FIGS. 3 to 9.

The extraction hole 11 is closed by the upper door 20 and the lower door 120 while the material S is being heated (FIG. 3).

When the operation of the extractor (not shown) is started, the upper door 20 is moved upward to open the extraction hole 11. The upper door 20 is sufficiently moved upwards so as not to collide with the extractor entering the body 10. In this case, the lower door 120 may be in an open state of only the central lower door 121 (FIG. 5), and may be in an open state (FIG. 8).

Before the material S is extracted to the outside of the body 10 by the extractor, the width of the material S loaded on the skid beam 15 through the first displacement sensor 12a and the second displacement sensor 12b is determined. Detect.

The first displacement sensor 12a detects whether the material S is located on the extraction path through the first auxiliary lower door 122 (S10). When it is detected that the material S is located on the extraction path through the first auxiliary lower door 122, the first displacement sensor 12a transmits the detection signal to the controller 40. The control unit 40 opens the first sub lower door 122 by operating the first sub lower door driving unit 132 based on the transmitted detection signal (S20, FIG. 6).

When the presence of the raw material S is detected through the first displacement sensor 12a, the width of the raw material S is the width of the central lower door 121, specifically, the extraction hole part opened by the central lower door 121 ( The first auxiliary lower door 122 is opened in addition to the central lower door 121 by recognizing that it is wider than the width of 11.

If the first displacement sensor 12a does not detect that the material S is located on the extraction path through the first auxiliary lower door 122, the controller 40 closes the first auxiliary lower door 122. (S25). If the first auxiliary lower door 122 is closed, the state is maintained.

The second displacement sensor 12b detects whether the material S is located on the extraction path through the second auxiliary lower door 123 (S30). When it is detected that the material S is located on the extraction path through the second auxiliary lower door 123, the second displacement sensor 12b transmits the detection signal to the controller 40. The control unit 40 opens the second sub lower door 123 by operating the second sub lower door driving unit 133 based on the transmitted detection signal (S40, FIG. 7).

When the presence of the material S is detected through the second displacement sensor 12b, the width of the material S is the width of the central lower door 121, specifically, the extraction hole part opened by the central lower door 121 ( The second auxiliary lower door 123 is opened in addition to the central lower door 121 by recognizing that it is wider than the width of 11).

If the material S is not detected on the extraction path through the second auxiliary lower door 123 in the second displacement sensor 12b, the controller 40 closes the second auxiliary lower door 123. (S45). If the second auxiliary lower door 123 is in a closed state, the state is maintained.

When the presence of the material S is detected in both the first displacement sensor 12a and the second displacement sensor 12b, the first auxiliary lower door 122 and the second auxiliary lower door 123 in addition to the central lower door 121 are detected. Are simultaneously opened (FIG. 8). On the contrary, if the presence of the material S is not detected in both the first displacement sensor 12a and the second displacement sensor 12b, that is, the extracted material S is extracted on the extraction path through the first auxiliary lower door 122. If it is not located on the extraction path through the second auxiliary lower door 123 and is not located in the first auxiliary lower door because the extraction of the material S can proceed smoothly only by opening the central lower door 121 ( 122) and the second auxiliary lower door 123 is closed (FIG. 5). Of course, if the first auxiliary lower door 122 and the second auxiliary lower door 123 are closed, the state is maintained.

When the extraction of the material S is completed, the control unit 40 moves upward so that the central lower door 121, the first auxiliary lower door 122, and the second auxiliary lower door 123 closely contact the upper door 20. (FIG. 9). Accordingly, the extraction hole 11 is closed in its entirety. Then, the upper door 20 and the lower door 120 are moved downward while being in close contact with each other to return to the initial position (FIG. 3).

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

1: heating apparatus 10: body
11: extraction hole 12: displacement sensor
12a: first displacement sensor 12b: second displacement sensor
13 cooling unit 20 upper door
30: upper door driving unit 40: control unit
120: lower door 121: center lower door
122: first auxiliary lower door 123: second auxiliary lower door
130: lower door driving unit 131: central lower door driving unit
132: first secondary lower door driving unit 133: second secondary lower door driving unit

Claims (10)

Body having an extraction hole for extracting the material;
An upper door and a lower door that open and close the extraction hole;
An upper door driving unit which vertically moves the upper door;
A lower door driver for moving the lower door up and down; And
It includes a control unit for controlling the operation of the upper door driver and the lower door driver,
The body is provided with a displacement sensor for detecting the presence of the material,
The displacement sensor transmits a detection signal to the control unit, the control unit controls the operation of the lower door driver based on the detection signal,
The lower door is a central lower door;
A first auxiliary lower door disposed at one side of the central lower door; And
A second auxiliary lower door disposed on the other side of the central lower door,
The lower door driving unit may include a central lower door driving unit which vertically moves the central lower door;
A first auxiliary lower door driving unit which vertically moves the first auxiliary lower door; And
A second auxiliary lower door driving part configured to move the second auxiliary lower door up and down;
The control unit individually controls the operation of the central lower door driver, the first auxiliary lower door driver and the second auxiliary lower door driver,
The displacement sensor may include a first displacement sensor disposed on an extraction path through the first auxiliary lower door; And
A second displacement sensor disposed on the extraction path through the second auxiliary lower door,
The control unit operates the first auxiliary lower door driver to open the first sub lower door when the first displacement sensor detects the presence of the material, and when the second displacement sensor detects the presence of the material, Furnace apparatus having a lower door, characterized in that for operating the second auxiliary lower door drive unit to open the second auxiliary lower door.
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The body of the heating apparatus having a lower door, characterized in that the cooling unit for cooling the displacement sensor is provided.
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