KR102361976B1 - Curtain device for heat treatment furnace and control method therefor - Google Patents

Abstract

The present invention relates to a curtain device for a heat treatment furnace capable of minimizing the heat loss in the heat treatment furnace by minimizing the open area when the door of the heat treatment furnace is opened for loading or unloading materials, and a method for controlling the same, in the width direction of the material A curtain unit formed by a combination of a plurality of fire curtains that are separated into a plurality of rows and can be individually driven up and down; , a sensor unit that detects the position of the material entering the opening portion and receives a detection signal from the sensor unit to set the opening range of the curtain part for opening the opening part, and control the driving unit according to the set opening range It may include a control unit for driving at least one of the plurality of fire resistant curtains of the curtain unit by applying a signal.

Description

Curtain device for heat treatment furnace and control method therefor

The present invention relates to a curtain device for a heat treatment furnace and a control method thereof, and more particularly, to a heat treatment furnace capable of minimizing heat loss in the heat treatment furnace by minimizing the open area when the door of the heat treatment furnace is opened for loading or unloading materials. It relates to a furnace curtain device and a method for controlling the same.

The heat treatment furnace used in the heavy plate process is a device in which heat treatment processes such as normalizing and tempering are performed in order to obtain the final material properties desired by the user for materials having various thicknesses and widths, unlike reheating furnaces. In general, in a heat treatment furnace, a door for taking in and out of a material is installed on the front side and a heater is installed inside it. do.

Accordingly, during the time when the door of the heat treatment furnace is opened and the material is brought in or taken out, external air flows into the inside of the heat treatment furnace or heat from the inside escapes to the outside, resulting in a heat loss that lowers the internal temperature of the heat treatment furnace Therefore, it takes a lot of time to raise the temperature inside the heat treatment furnace again to a temperature at which the heat treatment process is possible again, and there is a problem in that a lot of energy is consumed.

Laid-open Patent Publication No. 10-2012-0057989 (published on June 07, 2012)

The present invention is to solve various problems including the above problems, and it is possible to minimize the heat loss in the heat treatment furnace by minimizing the open area when the door of the heat treatment furnace is opened to bring in or take out materials. An object of the present invention is to provide a curtain device and a method for controlling the same. However, these problems are exemplary, and the scope of the present invention is not limited thereto.

According to one embodiment of the present invention, there is provided a curtain device for a heat treatment furnace. The curtain device of the heat treatment furnace is installed in the front or rear of the door that opens and closes the open part in the open part of the heat treatment furnace that heats and heats the material, so that heat loss of the heat treatment furnace can be minimized during the opening operation of the door In the curtain device of the heat treatment furnace to minimize the open area of the open portion so as to, comprising: a curtain portion separated into a plurality of rows along the width direction of the material, formed by a combination of a plurality of fireproof curtains that can be individually driven up and down; a driving unit for individually driving up and down the plurality of fireproof curtains of the curtain unit; a sensor unit installed on the upper side of the opening part to detect the position of the material entering the opening part; and at least one of the plurality of fireproof curtains of the curtain unit by receiving a detection signal from the sensor unit to set an open range of the curtain unit for opening the open unit, and applying a control signal to the driving unit according to the set open range. It may include; a control unit for driving the.

According to an embodiment of the present invention, the sensor unit is a camera sensor that acquires an image of the material conveyed toward the opening by a conveying roller, and the control unit receives an image signal obtained by the camera sensor, It is possible to calculate a position where the material is arranged on the conveying roller based on the width direction of the material.

According to an embodiment of the present invention, the control unit receives and stores information about the width and thickness of the material in advance, and uses the width information, thickness information and location information of the material to determine the open range of the curtain part can be set.

According to an embodiment of the present invention, the driving unit, the plurality of fire-resistance curtains are individually installed to elevating the elevating rod for elevating the plurality of fire-resistance curtains; a drive rod connected to the elevating rod and a gear combination to apply a driving force to the elevating rod; and a driving motor for driving the driving rod.

According to an embodiment of the present invention, the driving unit is installed so as to be able to move forward and backward for each between the elevating rod and the driving rod of the plurality of fireproof curtains to connect or release a gear combination between the elevating rod and the driving rod. It may further include a plurality of connecting gears.

According to an embodiment of the present invention, the elevating rod and the driving rod include a rack and a pinion (Rack) and a pinion (Rack) to convert the rotational motion of the driving rod rotated by the driving motor into the elevational movement of the lifting rod. Pinion) is connected by a gear combination of gears, and the plurality of connecting gears are installed for each gear combination of the rack and pinion gear, and when driving forward, connect the gear combination of the rack and pinion gear, and when driving backward It is possible to release the gear combination of the rack and pinion gear.

According to an embodiment of the present invention, the plurality of connection gears may be formed as a large gear having a greater number of gear teeth than the pinion gear so that a gear ratio between the pinion gear and the gear ratio of the driving rod can be formed.

According to an embodiment of the present invention, the control unit controls the forward and backward driving of the plurality of connecting gears, respectively, and according to the set open range of the curtain part, the fire curtain corresponding to the open range among the plurality of fire curtains It is possible to connect the gear combination between the elevating rod and the driving rod by advancing the connecting gear of the .

According to another embodiment of the present invention, a method for controlling a curtain device of a heat treatment furnace is provided. The control method of the curtain device of the heat treatment furnace may include: a sensing step of sensing a position of the material entering the open portion of the heat treatment furnace by the sensor unit; an open range setting step of the control unit receiving the detection signal from the sensor unit and setting the open range of the curtain unit; and a curtain unit opening step in which the control unit controls the driving unit to raise the fire curtain corresponding to the open range among the plurality of fire curtains of the curtain unit to a predetermined height.

According to an embodiment of the present invention made as described above, it is a combination of a plurality of fire curtains that are separated into a plurality of rows along the width direction of the material at the front or rear of the door that opens and closes the opening of the heat treatment furnace and can be individually driven up and down. The formed curtain part is formed, and only the fire curtain corresponding to the opening range set according to the width or thickness of the material to be brought in or taken out and the entry position is opened to a minimum, thereby opening the opening of the heat treatment furnace when the material is brought in or taken out. area can be minimized.

Therefore, the heat loss of the heat treatment furnace is reduced by opening the door of the heat treatment furnace and suppressing the inflow of external air into the inside of the heat treatment furnace or the escape of internal heat to the outside during the time for bringing in or taking out the material. By minimizing it, it is possible to implement a curtain device for a heat treatment furnace and a control method thereof having the effect of shortening a process time for reheating the heat treatment furnace and reducing energy loss. Of course, the scope of the present invention is not limited by these effects.

1 and 2 are cross-sectional views schematically showing the side and front of a curtain device of a heat treatment furnace according to an embodiment of the present invention.
3 to 5 are cross-sectional views illustrating a process in which the driving unit of the curtain device of the heat treatment furnace of FIG. 2 individually drives the plurality of fire curtains up and down.
FIG. 6 is a cross-sectional view showing that a plurality of fireproof curtains of the curtain device of the heat treatment furnace of FIG. 2 are minimally opened depending on the incoming material.

Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these embodiments are provided so as to more fully and complete the present disclosure, and to fully convey the spirit of the present invention to those skilled in the art. In addition, in the drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations of the illustrated shape can be envisaged, for example depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the spirit of the present invention should not be construed as limited to the specific shape of the region shown in the present specification, but should include, for example, changes in shape caused by manufacturing.

1 and 2 are cross-sectional views schematically showing the side and front of the curtain device 100 of the heat treatment furnace according to an embodiment of the present invention, and FIGS. 3 to 5 are the curtain device 100 of the heat treatment furnace of FIG. 2 . of the driving unit 20 is a cross-sectional view showing a process of individually driving up and down the plurality of fire curtains (C), FIG. 6 is a plurality of fire curtains (C) of the curtain device 100 of the heat treatment furnace of FIG. It is a cross-sectional view showing the minimum opening according to the material (S).

First, as shown in FIG. 1 , the curtain device 100 for a heat treatment furnace according to an embodiment of the present invention is opened at the opening 210 of the heat treatment furnace 200 for heating and heat treating the material S. It is installed in the front or rear of the door D that opens and closes the part 210 to minimize the open area of the opening part 210 so as to minimize the heat loss of the heat treatment furnace 200 when the door D is opened. As a device for doing so, it may largely include a curtain unit 10 , a driving unit 20 , a sensor unit 30 , and a control unit 40 .

1 and 2, the curtain unit 10 is separated into a plurality of rows along the width direction of the material (S), and is formed by a combination of a plurality of fireproof curtains (C) that can be individually driven up and down. can

More specifically, the plurality of refractory curtains C of the curtain unit 10 may be made of a refractory material that does not burn with the flame generated in the heat treatment furnace 200 . In addition, the plurality of fire curtains (C) is a first fire curtain (C1), a second fire curtain (C2), a third fire curtain (C3), and an nth fire curtain (Cn) along the width direction of the material (S). ), it can be separated into multiple columns and can be individually driven up and down. The number of the plurality of fire curtains (C) formed by being separated into a plurality of rows may be made of a combination of various numbers of fire curtains according to the needs of the user.

In addition, as shown in FIGS. 1 and 2 , the driving unit 20 may vertically drive the plurality of fire resistant curtains C of the curtain unit 10 up and down. For example, the driving unit 20 is individually installed on the plurality of fire curtains (C) to elevate and lower the plurality of fire curtains (C), the elevating rod 21 and the elevating rod 21 and the gear combination (G). It may include a driving rod 22 that is connected to apply a driving force to the elevating rod 21 and a driving motor 23 that drives the driving rod 22 .

As shown in FIG. 3 , the driving unit 20 includes a plurality of fire curtains ( A plurality of gear combinations G between the elevating rod 21 and the driving rod 22 are selectively connected or released by being installed so as to be able to move forward and backward for each of the elevating rod 21 and the driving rod 22 of C). It may further include a connecting gear 24 .

For example, the elevating rod 21 and the driving rod 22 are racks to convert the rotational motion of the driving rod 22 rotated by the driving motor 23 into the ascending and descending movement of the elevating rod 21 . ) (R) and pinion (P) can be connected by a gear combination (G) of the gear. At this time, the rack (R) and the pinion (P) gears are spaced apart from each other and are not directly connected, and may be a gear combination (G) in which power is connected by a plurality of connecting gears 24 .

More specifically, a plurality of connecting gears 24 are installed between the gear combinations G of the rack (R) and pinion (P) gears, and when driving forward, the gears of the rack (R) and pinion (P) gears The combination (G) is connected, and the gear combination (G) of the rack (R) and the pinion (P) gear can be released when driving backward.

Such a plurality of connecting gears 24 can be individually driven forward or backward by a linear actuator A provided for each of the connected gears. Here, as the linear actuator (A), any one of an electric cylinder, a hydraulic cylinder, and a pneumatic cylinder may be used. However, it is not necessarily limited to FIG. 3 , and various driving devices capable of driving the plurality of connecting gears 24 forward or backward may be used.

In addition, the plurality of connecting gears 24, the pinion (P) gear of the driving rod 22 and a large gear having a larger number of teeth than the pinion (P) gear so that a predetermined gear ratio can be formed. can be formed with For example, the pinion (P) gear of the driving rod 22 and the plurality of connecting gears 24 may be formed of a spur gear or a helical gear, and the pinion P of the driving rod 22 ) gears are formed as small gears, and a plurality of connecting gears 24 may be formed as large gears. At this time, when the rack (R) gear of the elevating bar 21 is the pinion (P) gear of the driving bar 22 and the plurality of connecting gears 24 are spur gears, the gear teeth are formed horizontally. and, when the pinion (P) gear of the driving rod 22 and the plurality of connecting gears 24 are helical gears, the gear teeth may be formed to be inclined.

With this configuration, even when the driving rod 22 is driven using the driving motor 23 having a low torque, the gear ratio between the pinion (P) gear of the driving rod 22 and the plurality of connecting gears 24 . Due to this, the driving torque transmitted by the plurality of connection gears 24 to the rack (R) gear of the elevating rod 21 may be amplified. Accordingly, it is possible to stably elevate the elevating rod 21 with the rack (R) gear formed thereon even with the low-output drive motor 23, and the amount of elevating and lowering of the elevating bar 21 can be precisely adjusted using the gear ratio. Therefore, it is also possible to precisely control the opening amount of the plurality of fire curtains (C) installed at the lower end of the elevating rod (21).

Accordingly, as shown in FIG. 4 , among the plurality of connection gears 24 installed for each of the plurality of fire curtains C, the fire curtain C corresponding to the opening range set by the control unit 40 to be described later corresponds to It is possible to connect the gear combination (G) of the rack (R) gear of the elevating bar 21 and the pinion (P) gear of the drive bar 22 by driving the connecting gear 24 to be forward driven by the linear actuator (A). have.

Then, as shown in FIG. 5, when the driving motor 23 is driven to rotate the driving rod 22, the gear combination of the rack (R) and the pinion (P) gear connected by the connection gear 24 (G) As the driving force is transmitted to the elevating rod 21, the fire curtain C can be raised. In this embodiment, the gear combination (G) of the elevating rod 21 and the driving rod 22 is a combination of a rack (R) and a pinion (P) gear. Without being limited thereto, a variety of ways that can convert the rotational motion of the drive rod 22 into the elevation motion of the elevating rod 21, such as a combination of a worm wheel and a worm gear, and a combination of a bevel gear A combination of gears may be possible.

In this way, the open area of the combination of a plurality of fireproof curtains C of the curtain unit 10 that can be individually driven up and down by the driving unit 20 may be set and controlled by the control unit 40 .

For example, the material S may be transferred by the transfer roller 300 to enter the inside of the heat treatment furnace 200 through the open portion 210 of the heat treatment furnace 200 . At this time, even if the materials S transferred toward the heat treatment furnace 200 have the same thickness and width, the positions seated on the transfer roller 300 for each material S may be different. For example, the first material enters the heat treatment furnace 200 in a state in which it is seated biased to the right with respect to the width direction of the material S on the conveying roller 300 , and then the second material to be conveyed is the conveying roller Entering into the heat treatment furnace 200 in a state of being seated biased to the left with respect to the width direction of the material (S) on the 300, the seated position on the transfer roller 300 is different for each material (S) entered can do.

Accordingly, as shown in FIGS. 1 and 6 , the sensor unit 30 is installed on the upper side of the open portion 210 of the heat treatment furnace 200 and the material S entering the open portion 210 is transported. Sensing the position seated on the roller 300 , the control unit 40 receives a detection signal from the sensor unit 30 and opens the opening 210 of the heat treatment furnace 200 of the curtain unit 10 . An open range may be set, and at least one of a plurality of fireproof curtains C of the curtain unit 10 may be driven by applying a control signal to the driving unit 20 according to the set open range.

More specifically, the sensor unit 30 is a camera sensor 31 that acquires an image of the material S conveyed toward the open portion 210 of the heat treatment furnace 200 by the conveying roller 300 , and the control unit (40), by receiving the image signal obtained by the camera sensor 31, the material (S) on the transfer roller 300 can calculate the aligned position based on the width direction of the material (S). At this time, the control unit 40 may receive and store information about the width and thickness of the material (S) in advance, and the alignment position information of the material (S) calculated by the detection signal applied from the sensor unit 30 and the previously stored information on the width and thickness of the material S may be used to set the opening range of the curtain unit 10 .

Then, the control unit 40, the driving unit 20 for individually driving the plurality of fire curtains (C) up and down so that the plurality of fire curtains (C) of the curtain unit (10) can be opened by the set opening range. can be controlled

For example, the control unit 40 may control the forward and backward driving of the plurality of connection gears 24 of the driving unit 20 , respectively, and according to the set opening range of the curtain unit 10 , a plurality of fireproof curtains (C) By advancing the connecting gear 24 corresponding to the fire curtain corresponding to the open range, and connecting the gear combination G between the elevating rod 21 and the driving rod 22, among a plurality of fire curtains (C) Only fire curtains corresponding to the open range can be raised. At this time, the height to which the plurality of fireproof curtains (C) is raised can be increased only to the minimum height that the material (S) can pass through using the information about the thickness of the material (S) input in advance.

Accordingly, the curtain device 100 of the heat treatment furnace is seated on the conveying roller 300 of the material S that enters the open part 210 of the heat treatment furnace 200 from the sensor unit 30 through the sensing step. , and the control unit 40 receives the detection signal from the sensor unit 30 through the opening range setting step to set the open range of the curtain unit 10 . Then, through the opening step, the control unit 40 controls the driving unit 20 to raise the fire curtain corresponding to the open range among the plurality of fire curtains C of the curtain unit 10 to a predetermined height. can do.

Therefore, in the curtain device 100 of the heat treatment furnace according to an embodiment of the present invention, the width direction of the material S in the front or rear of the door D for opening and closing the opening 210 of the heat treatment furnace 200 The curtain unit 10 is formed by a combination of a plurality of fire curtains (C) that are separated into a plurality of rows and can be individually driven up and down, depending on the width or thickness of the material (S) to be brought in or taken out and the entry position. By raising and opening only the fire curtain corresponding to the set open range to a minimum, it is possible to minimize the open area of the open part 210 of the heat treatment furnace 200 when the material S is brought in or taken out.

Accordingly, during the time during which the door (D) of the open part 210 of the heat treatment furnace 200 is opened to bring in or take out the material S, external air flows into the inside of the heat treatment furnace 200 or the heat treatment furnace ( 200) By minimizing the heat loss of the heat treatment furnace 200 by suppressing internal heat from escaping to the outside, it is possible to have the effect of shortening a process time for reheating of the heat treatment furnace 200 and reducing energy loss.

In addition, by forming the curtain unit 10 in a combination of a plurality of fireproof curtains (C) separated into a plurality of rows, it is possible to easily replace each part during maintenance of the curtain unit 10, and the driving unit 20 is one By having a simple structure capable of individually driving up and down the plurality of fire curtains C of the curtain unit 10 with the drive motor 23 , it is possible to have the effect of easy installation in the existing heat treatment furnace structure.

Although the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: curtain unit
20: drive unit
21: elevating rod
22: drive rod
23: drive motor
24: a plurality of connecting gears
30: sensor unit
31: camera sensor
40: control unit
100: curtain device of the heat treatment furnace
200: heat treatment furnace
210: opening
300: transfer roller
C: multiple fireproof curtains
D: door
G: gear combination
R: rack gear
P: pinion gear
S: material

Claims (9)

In the curtain device of the heat treatment furnace installed in the front or rear of the door that opens and closes the open portion in the open portion of the heat treatment furnace to heat and heat a material,
a curtain unit separated into a plurality of rows along the width direction of the material and formed as a combination of a plurality of fire resistant curtains that can be individually driven up and down;
a driving unit for individually driving up and down the plurality of fireproof curtains of the curtain unit;
a sensor unit installed on the upper side of the opening part to detect the position of the material entering the opening part; and
At least one of the plurality of fireproof curtains of the curtain unit is set by receiving a detection signal from the sensor unit to set an open range of the curtain unit for opening the open unit, and applying a control signal to the driving unit according to the set open range a control unit for driving; including;
The driving unit,
an elevating rod which is individually installed on the plurality of fire curtains to elevate and lower the plurality of fire curtains;
a drive rod connected to the elevating rod and a gear combination to apply a driving force to the elevating rod;
a driving motor for driving the driving rod; and
A plurality of connecting gears installed so as to move forward and backward between the elevating rod and the driving rod of the plurality of fire curtains to connect or release a gear combination between the elevating rod and the driving rod; includes;
The control unit is
Each of the forward and backward driving of the plurality of connecting gears is controlled, and the connecting gear of the fire curtain corresponding to the open range among the plurality of fire curtains is advanced according to the set open range of the curtain part, so that the elevating rod and the driving rod are advanced. By connecting the gear combination therebetween, when the driving motor is driven to rotate the driving rod, only the fire curtain corresponding to the open range among the plurality of fire curtains is raised. The method of claim 1,
The sensor unit,
It is a camera sensor that acquires an image of the material conveyed toward the opening by a conveying roller,
The control unit is
Curtain device for a heat treatment furnace, receiving the image signal obtained by the camera sensor, calculating a position in which the material is aligned based on the width direction of the material on the transfer roller. 3. The method of claim 2,
The control unit is
Curtain device for a heat treatment furnace, which stores information about the width and thickness of the material in advance, and sets the opening range of the curtain unit by using the width information, thickness information, and position information of the material. delete delete The method of claim 1,
The elevating rod and the driving rod,
It is connected by a gear combination of a rack and a pinion gear so as to convert the rotational motion of the driving rod rotated by the driving motor into an ascending and descending motion of the lifting rod,
The plurality of connecting gears,
A curtain device for a heat treatment furnace that is installed between the gear combinations of the rack and pinion gear, connects the gear combination of the rack and pinion gear when driving forward, and releases the gear combination of the rack and pinion gear when driving backward . delete delete The method for controlling the curtain device of the heat treatment furnace according to any one of claims 1, 2, 3 and 6,
a sensing step of sensing a position of the material entering the open portion of the heat treatment furnace in the sensor unit;
an open range setting step of the control unit receiving the detection signal from the sensor unit and setting the open range of the curtain unit; and
a curtain part opening step in which the controller controls the driving part to raise a fire curtain corresponding to the open range among the plurality of fire curtains of the curtain unit to a predetermined height;
Including, a control method of the curtain device of the heat treatment furnace.

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