KR101365533B1 - Skirt device of belt conveyor - Google Patents

Abstract

The present invention relates to a skirting apparatus of a belt conveyor that can be sealed without direct contact with the belt while being installed in a chute for dropping a shipment to a belt conveyor. A skirt device installed in a chute for supplying a hot shipment or a cold shipment, wherein the skirt device is installed in the chute and is spaced apart from an upper surface of the belt so as to tunnelly surround the upper region of the belt. A skirt body unit provided with a pair of walls installed to face each other, and having a thermal box connecting the upper end of the wall to surround the belt; A suction skirt installed at both sides of the inner surface of the skirt body unit to flow air for sealing the edge region of the belt in a non-contact manner; And an air control unit for automatically turning on or off the flow of air flowing in the suction skirt in response to the temperature state of the vehicle to be supplied to the belt.

Description

Skirt device of belt conveyor {SKIRT DEVICE OF BELT CONVEYOR}

The present invention relates to a skirting apparatus of a belt conveyor, and more particularly, to a skirting apparatus of a belt conveyor that can be sealed without direct contact with the belt while being installed in a chute for dropping a shipment to the belt conveyor.

In general, raw materials and fuels used for coke production are loaded on a belt conveyor through a chute and transported to a workplace such as a yard, and raw materials are blended through crushing and the like to produce coke.

Belt conveyors, used to transport raw materials and fuels, are suitable for transporting large quantities of goods in a short time, and are usually equipped with a belt installed for crawling, a drive unit for rotating the belt, and a tension control for maintaining the tension of the belt. It is comprised of parts and other accessory devices.

In addition, one side of the belt conveyor is provided with a chute for supplying the goods to the upper portion of the belt, the chute prevents the goods from falling to the lower portion of the belt and at the same time the dust generated during the falling of the goods is discharged to the outside environment The skirt device is provided so as not to pollute.

The skirt device is provided with a skirt body covering the upper portion of the belt in a box shape or a tunnel shape, and rubber materials for pressing both edges of the belt to seal the space between the belt and the bottom of both sides of the skirt body. ) Is provided with an adhesive member.

In the sealing method by direct contact between the belt upper surface and the lower end of the skirt, a wear phenomenon occurs in which the edge of the belt is recessed in the longitudinal direction by the skirt device pressing the belt excessively for a long time, thereby shortening the life of the belt There was a disadvantage of having to dispose of early. In addition, a shipment is constricted at the contact portion of the belt and the skirt, the constricted shipment damages the belt, causing the belt to fall off or meander.

However, in the related art, the problem caused by the direct contact between the skirting device and the belt has not been solved, and only the proposed technology is used to effectively prevent the belt from meandering or falling from the belt. These techniques, for example, allow the belt to adhere to the belt automatically while efficiently collecting dust generated when the transport drops onto the belt, and guide the transport falling from the chute to the belt to the center of the belt. Techniques for guiding lost transport to the center of the belt and techniques to prevent the shipment from falling to the bottom of the belt, even if the belt meanders or the load is loaded to one side of the belt, have been proposed. As for "conveyor belt chute device (Patent 10-2011-0117885)", "conveyor leakage prevention device (belt conveyor 10-2002-0031485) of the belt conveyor chute) and" falling device blocking device of the skirt box of the belt conveyor. (Registered patent 10-0815729).

On the other hand, in recent years, a technique has been proposed in which the skirt member is kept in a non-contact state with respect to the belt, forms a space between the skirt member and the belt, and sucks or blows out air through suction or blowing means. It is specifically known in the "conveyor skirt structure (JP-A-1996-290814)" and "conveyor skirt structure (JP-A-1996-319018)."

However, the skirt structure using the suction means or the skirt structure using the ejection means is a technique which is provided with the suction means alone or with the ejecting means to simply seal between the skirt member and the belt by the suction means or the ejecting means. However, such a technique has a disadvantage in that it can perform only a function of effectively sealing so that dust generated in a transport carried by the belt is not scattered.

Publication 10-2011-0117885 (October 28, 2011) Patent Publication 10-2002-0031485 (2002. 05. 02) Patent Registration 10-0815729 (2008.03.14) Japanese Laid-Open Patent 1996-290814 (1996. 11. 05) Japanese Patent Publication 1996-319018 (1996. 12. 03)

The present invention provides a skirting apparatus of a belt conveyor that can seal the edges of the belt without direct contact with the belt and can effectively collect the dust generated when the shipment falls from the belt or the supply of the shipment.

In addition, the belt that can prevent the failure of the skirting device and the dust collecting equipment connected thereto by collecting the moist dust by automatically turning on or off the flow of air for sealing in response to the temperature of the conveyed goods to the belt conveyor. Provide the skirting device of the conveyor.

A skirting apparatus of a belt conveyor according to an embodiment of the present invention is a skirting apparatus installed on a chute for supplying a hot goods or cold goods to a belt of a belt conveyor, which is provided on the chute, A pair of walls are provided to be spaced apart from each other at both edge regions of the belt so as to enclose the upper region of the belt in a tunnel form, and a thermal box is provided to connect the upper end of the wall to surround the belt. A skirt body unit; A suction skirt installed at both sides of the inner surface of the skirt body unit to flow air for sealing the edge region of the belt in a non-contact manner; And an air control unit for automatically turning on or off the flow of air flowing in the suction skirt in response to the temperature state of the vehicle to be supplied to the belt.

The suction skirt is installed on an inner circumferential surface of the wall, and a hollow part through which air flows is formed therein, and an inlet opening is formed in a line type along both edge regions of the belt.

An extension cover portion extending downward is formed at a lower end of the suction skirt, and the suction port is formed to be formed in an inner portion of the extension cover portion so as to be adjacent to the extension cover portion, and is gradually narrowed from the outside toward the hollow portion. .

The air control unit includes a housing in which both ends communicate; A first fixing member disposed at one side of the housing and having a first hole through which air flows; A second fixing member disposed on the other side of the housing and having a second hole communicating with the first hole; A variable member disposed between the first fixing member and the second fixing member and moved by a shape memory spring which is converted into a compressed shape at a temperature higher than a temperature set by the temperature state of the vehicle to open the second hole; A self-control valve disposed between the variable member and the first fixing member and configured with a restoring spring that provides a restoring force to move the variable member in a direction of closing the second hole at a temperature below a temperature set by the temperature state of the vehicle. It includes.

The shape memory spring is to be converted to a compressed shape in the hot state while moving the variable member to open the second hole, the feature is converted to the compressed shape in the cold state is removed the restoring spring Relaxing by the restoring force of the variable member is characterized in that for closing the second hole.

The air control unit includes a main pipe for sucking air; And a branch pipe branched from the main pipe and connected to the suction skirt while passing through the thermal box, wherein the self control valve is installed at a position embedded in the thermal box among the branch pipes, Correspondingly, it is automatically opened and closed.

According to an embodiment of the present invention, by controlling the flow of air provided for the sealing action to the belt edge region correspondingly according to the temperature state of the shipment, low moisture dust is effectively collected and removed, and the wet dust is collected. There is an effect that can prevent the failure of the skirt device and the dust collecting equipment by suppressing the.

In addition, the sealing device is made to be sealed by air in a state in which the skirting device is not directly in contact with the edge of the belt and is separated from each other, thereby effectively preventing the separation of the cargo by the skirting device and collecting dust generated by the supply of the cargo. The wear of the belt can be prevented. As a result, the life of the belt can be extended, and the belt can be prevented from falling off and meandering caused by a transportation object being caught in the contact portion between the belt and the skirt device.

And, by using the air provided for the sealing action to the belt edge region it is possible to remove the dust constricted to the suction port of the suction type skirt has the effect of always maintaining the device in a normal state.

1 is a perspective view showing a skirt device of the belt conveyor according to an embodiment of the present invention,
2 is a cross-sectional view showing a skirt device of the belt conveyor according to an embodiment of the present invention,
3 is a view showing a suction skirt of the skirting device of the belt conveyor according to an embodiment of the present invention,
4 is a view showing an air control unit of the skirt device of the belt conveyor according to an embodiment of the present invention,
5 to 7 is a view showing the operating state of the skirt device of the belt conveyor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

1 is a perspective view showing a skirt device of the belt conveyor according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a skirt device of the belt conveyor according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a view illustrating a suction skirt of a skirt device of a belt conveyor according to an example, and FIG. 4 is a view illustrating an air control unit of a skirt device of a belt conveyor according to an embodiment of the present invention.

In order to help explain the belt conveyor according to an embodiment of the present invention, the configuration of the belt conveyor will be described first.

The belt conveyor is installed to move in a tracked manner, the belt 20 for transporting the goods, the roller 30 for supporting the lower surface of the belt 20, and the belt 20 is installed in the upper region of the belt 20 to transport the goods It includes a chute (10) for supplying the upper surface of the.

As shown in the drawings, the skirting apparatus of the belt conveyor according to the embodiment of the present invention is a device installed in the chute 10 for supplying the hot goods or cold goods to the belt 20, largely the belt The skirt body unit 100 which encloses the upper region of the belt 20 in a tunnel form while being spaced apart from the upper surface of the 20 and seals the edge region of the belt 20 in a non-contact manner with the belt 20. And a suction skirt 200 for flowing air, and an air control unit 300 for controlling the flow of air flowing through the suction skirt 200.

The skirt body unit 100 covers an end portion of the chute 10 or is mounted to the chute 10 to enclose an area in which a shipment (hereinafter referred to as “raw material”) is supplied to the belt by the chute 10. As a unit, it is installed in the chute 10, and is formed to tunnelly surround the upper region of the belt 20 by opening the lower portion while being spaced apart from the upper surface of the belt 20. For example, the skirt body unit 100 includes a pair of walls 110 and a thermal box 120 connecting upper ends of the walls 110.

The wall 110 is arranged to extend in the longitudinal direction of the belt 20 in both edge regions of the belt 20, in particular extending a predetermined distance along the longitudinal direction of the belt 20 at the front and rear ends of the chute 10. Is installed. At this time, the wall 110 is installed upright in the vertical direction so as to face each other in both edge regions of the belt (20). In particular, the lower end of the wall 110 is preferably spaced apart from the upper surface of the belt 20 by a predetermined distance (d1). At this time, the predetermined interval d1 is smaller than the average size of the raw material, it is preferable to suppress the separation of the raw material into the space between the belt 20 and the wall 110.

The thermal box 120 connects the upper ends of the pair of walls 110 to surround the belt 20. In this case, the thermal box 120 does not connect the entire upper end area of the wall 110, but an area excluding the area surrounded by the chute 10, that is, the wall 110 at the front and rear ends of the chute 10. Connect the upper end of the extended area.

In particular, the thermal box 120 has an accommodating space therein, and the accommodating space includes a branch pipe 320 and a self control valve 330 of the air control unit 300 to be described later. Thus, the self control valve 330 is opened and closed according to the temperature of the raw material supplied to the belt 20 through the chute 10. Accordingly, it is preferable that the wall 110 and the thermal box 120 use a material having good thermal conductivity in order to operate the self control valve 330 according to the temperature state of the raw material. For example, the wall 110 and the thermal box 120 are manufactured using a metal material having good thermal conductivity.

The suction skirt 200 is a means for flowing air sealing the edge region of the belt 20, and the suction skirt 200 is a wall 110 of the skirt body unit 100. It is installed on the inner circumference.

The suction skirt 200 has a rectangular parallelepiped shape corresponding to the shape of the wall 110, and a hollow portion 210 through which air flows is formed, and a lower portion of the suction skirt 200 is formed along a line along both edges of the belt 20. A suction port 220 is formed which is open in a type. At this time, the suction port 220 is formed to be inclined downward toward the center of the belt 20, preferably from the outer side toward the hollow portion 210, that is to be gradually narrowed toward the edge direction at the center of the belt 20. . Thus, the inner space d2 is formed to be narrower than the outer space d3 of the suction port 220. The reason is that when the air is sucked into the suction port 220 to collect dust generated from the raw material, dust larger than the size of the suction port 220 is blocked by the suction port 220, and the dust collecting facility is not passed through the hollow part 210. At the same time to prevent the inflow to the back, and to back off the air to facilitate the removal of the dust clogged in the inlet (220).

On the other hand, the lower end of the suction skirt 200 is formed with an extension cover portion 230 extending downward to a position close to the belt 20. At this time, the extended cover portion 230 is preferably formed in parallel with the wall (110).

In addition, at least one connection pipe 240 for connecting the hollow portion 210 to the branch pipe 320 to be described later is connected to the upper end of the suction skirt 200. In addition, a liner 250 of a wear-resistant material is attached to an inner surface of the suction skirt 200 to prevent the suction skirt 200 from being damaged when the raw material is supplied to the belt 20.

The air control unit 300 flows (preferably suction) to the suction port 220 through the hollow portion 210 of the suction skirt 200 in response to the temperature state of the raw material supplied to the belt 20. A unit for automatically turning on (or off) the flow of air, the air control unit 300 is a main pipe 310 for sucking air, and the suction skirt 200 in the main pipe 310 The branch pipe 320 is branched to) and the self-control valve 330 is installed in the branch pipe 320 is automatically opened and closed in response to the temperature of the raw material.

The main pipe 310 is a pipe for flowing the air for sealing the edge of the belt 20, is connected to the dust collector installed separately from the skirt device of the present invention to flow to suck or blow the air. The main pipe 310 is provided with a solenoid valve 311 for opening or closing the main pipe 310 to control the flow of air.

The branch pipe 320 is a pipe branched from the main pipe 310, and is provided with at least one or more according to the size and shape of the suction skirt 200. One end of the branch pipe 320 is branched from the main pipe 310, and the other end thereof is connected to the connection pipe 240 of the suction skirt 200. In this case, the branch pipe 320 communicates the main pipe 310 and the suction skirt 200 through the inside of the thermal box 120 of the skirt body unit 100.

Meanwhile, a pressure gauge (not shown) may be installed at any point of the main pipe 310 or the branch pipe 320 to detect in real time the pressure of air flowing in the main pipe 310 and the branch pipe 320. In addition, the suction port 220 of the suction skirt 200 may be detected by the dust according to the change in the pressure.

The self control valve 330 is disposed in the thermal box 120 and is a means for automatically opening and closing the branch pipe 320 according to the temperature state of the raw material, and closing the self control valve 330. ) Is fabricated using shape memory alloys whose shape changes with changes in temperature.

For example, the self control valve 330 may include a housing 331 in which both ends thereof communicate; A first fixing member 332 disposed on one side of the housing 331 and having a first hole 332a through which air flows; A second fixing member 333 disposed on the other side of the housing 331 and having a second hole 333a communicating with the first hole 332a; Disposed between the first fixing member 332 and the second fixing member 333 and moved by a shape memory spring 335 which is converted into a compressed state at a temperature higher than a temperature set by the temperature state of the raw material. A variable member 334 opening the second hole 333a; The second hole 333a is disposed between the variable member 334 and the first fixing member 332 when the shape change of the shape memory spring 335 is compressed under a predetermined temperature. Restoration spring 336 is provided to provide a restoring force for moving the variable member 334 in the direction to close the.

The housing 331 is installed in the branch pipe 320 and is a means for embedding the first fixing member 332, the second fixing member 333, and the variable member 334 therein. In order to be made of two bodies and then assembled to each other is preferably formed.

The first fixing member 332 and the second fixing member 333 are embedded in the housing 331 in a state where they are spaced apart from each other and pass through the air flowing through the branch pipe 320. 332a and second holes 333a are formed, respectively. At this time, the inner diameter of the second hole 333a formed in the second fixing member 333 is preferably wider toward the first fixing member 332 to have a funnel shape.

Meanwhile, the variable member 334 opens and closes the second hole 333a of the second fixing member 333 while being moved in a space between the first fixing member 332 and the second fixing member 333. As a means, one side is provided with the shape memory spring 335 supported by the first fixing member 332, the other side corresponding to the funnel shape of the second hole (333a) of the second fixing member 333 It is formed into a shape. Thus, when the temperature is higher than the set temperature due to the temperature of the raw material, the shape memory spring 335 is converted into a compressed shape and the variable member 334 is moved toward the first fixing member 332 as the second hole. The variable member is opened by the restoring force of the restoring spring 336 when the 333a is opened and the temperature of the raw material is lowered below the set temperature and the shape memory spring 335 loses the characteristic of maintaining the compressed shape. 334 is moved in the direction of the second fixing member 333 and close to close the second hole 333a.

The shape memory spring 335 preferably has a property that the raw material is converted to a compressed shape while being exposed to a set temperature or more by the temperature in the hot state. For example, when the raw material is coke, hot coke is maintained at a temperature of 80 ° C. or higher, and cooling coke is maintained at a temperature of 40 ° C. or lower, and the shape memory spring 335 is compressed at a temperature of 60 ° C. or higher. It would be desirable to be fabricated to have the property to be converted. In addition, at a temperature of 60 ° C. or less, it may be desirable to be manufactured to have a property of being relaxed by the restoring force of the restoring spring 336 due to the loss of the property to be converted into a compressed shape.

Thus, when the shape memory spring 335 is converted to the compressed shape by the heat of the raw material as shown in Figure 4 (a) the variable member 334 is moved in the direction of the first fixing member 332 while the variable member ( 334 and the second fixing member 333 are spaced apart by a predetermined distance d4, and the second hole 333a and the first hole 332a communicate with each other, and are opened, and the shape memory spring 335 as shown in FIG. ) Is removed by the restoring force of the restoring spring 336 by removing the characteristic that is converted into a compressed shape by the cold air of the raw material, the variable member 334 is moved in the direction of the second fixing member 333, the variable member 334 and the second fixing member 333 are in close contact with each other so that the second hole 333a and the first hole 332a are closed.

In the self control valve 330 of the present embodiment, the shape memory spring 335 is converted into a shape compressed in hot, and is relaxed by the restoring force of the restoring spring 336 in cold, thereby moving the variable member 334. Although the second hole 333a of the second fixing member 333 is opened and closed, the self-control valve 330 is not limited to the shape and action shown, but the characteristics of the shape memory spring 335, the first fixing member 332. The second fixing member 333, the variable member 334, and the restoring spring 336 may be changed in various ways.

The operation state of the skirt device of the belt conveyor according to an embodiment of the present invention configured as described above will be described with reference to the drawings.

5 to 7 is a view showing the operating state of the skirt device of the belt conveyor according to an embodiment of the present invention.

5 is a view showing that dust is generated from the fuel is collected by the fuel in the hot state is supplied to the belt, Figure 6 is a view showing the blowing off the dust when the dust attached to the inlet by a long time collection operation 7 is a view showing that the cooling of the fuel is supplied to the belt to stop the collection of dust automatically.

As shown in FIG. 5, when the fuel in the hot state, for example hot coke 1A (80 ° C. or more) is supplied to the belt, the temperature of the hot coke 1A heats the thermal box 120 and accordingly The shape memory spring 335 of the self control valve 330 embedded in the thermal box 120 is converted into a compressed shape in response to the elevated temperature. Accordingly, the variable member 334 is moved so that the second hole 333a of the second fixing member 333 automatically communicates with the first hole 332a of the first fixing member 332 to open. In this state, when the air is sucked in through the main pipe 310 to collect the dust in the dust collector, the air in the upper portion of the belt 20 is sucked into the suction port 220 of the suction skirt 200, the hollow portion 210 The suction through the branch pipe 320, the self control valve 330, and the main pipe 310 to the dust collecting facility. Accordingly, air is sucked between the suction port 220 and the belt 20 of the suction skirt 200 while sealing. Accordingly, the suction skirt 200 and the belt 20 are sealed in a non-contact manner by air without directly contacting the suction skirt 200 and the belt 20.

On the other hand, if the dust collecting operation continues for a long time, the dust having a size slightly larger than the suction port 220 of the suction skirt 200 is attached to the suction port 220, thereby causing a failure to reduce the suction capacity, whereby As shown in FIG. 6, the dust is attached to the suction port 220 by blowing the air at a high pressure by controlling the flow of the air reversely in the dust collecting facility. For example, when the dust collecting operation is continued for a long time, it is possible to back off the flow of air periodically or in accordance with the pressure change of the air detected by the pressure gauge to remove the dust stuck in the inlet 220 with high pressure air.

As described above, the dust collecting or dust removal in the inlet 220 is performed in a state in which the branch pipe 320 is opened by the self control valve 330, and the generated dust is hot coke ( 1A), the suction skirt 200, the branch pipe 320, the self-control valve 330 and the main pipe 310, while the dust is collected into the dust collecting equipment of the pipe and dust collecting equipment in which air flows There is no caking phenomenon that builds up and hardens on the bag filter surface.

However, the cold coke (1B) is a hot coke (1A) is cooled by the cooling water, when the cooling coke (1B) is supplied to the belt does not generate much dust, but the dust generated at this time contains a large amount of moisture If this is collected, the air is caulked on the surface of the flow pipe and bag filter. Therefore, when the cold coke 1B is supplied to the belt 20, the dust collecting work must be stopped.

In this embodiment, when cold coke 1B (40 ° C. or less) is supplied to the belt 20 as shown in FIG. 7, the temperature of the cold coke 1B cools the thermal box 120 and accordingly. Shape restoring spring 335 of the self-control valve 330 built in the thermal box 120 is removed in response to the temperature of the cold coke (1B) to remove the characteristic of the restoring force of the restoring spring 336 Is relaxed by Accordingly, the variable member 334 is moved to close the second hole 333a of the second fixing member 333. In this state, even though the air is sucked through the main pipe 310 to collect the dust in the dust collecting facility, the branch pipe 320 is closed by the self control valve 330, and thus the dust suction work is not performed.

In this way, the variable member 334 is moved by the shape memory spring 335 in which the characteristic to be converted into the compressed shape or the compressed shape is removed according to the temperature of the fuel supplied to the belt 20. When the hot coke 1A is supplied because the open or closed 320 is supplied, the dust collecting action is automatically performed, and when the cold coke 1B is supplied, the dust collecting action is automatically stopped.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

10: suit 20: belt
30: roller 100: skirt body unit
110: wall 120: thermal box
200: suction skirt 210: hollow part
220: suction port 230: extension cover portion
240: connector 250: liner
300: air control unit 310: main pipe
311: solenoid valve 320: branch pipe
330: self control valve 331: housing
332: first fixing member 332a: first hole
333: second fixing member 333a: second hole
334: variable member 335: shape memory spring
336: restoring spring

Claims (6)

A skirting device installed in a chute for supplying a hot shipment or cold shipment to a belt of a belt conveyor,
A pair of walls are provided on the chute and are installed to face each other at both edge regions of the belt so as to tunnelly surround the upper region of the belt while being spaced apart from the upper surface of the belt, and connect the upper end of the wall. A skirt body unit having a thermal box surrounding the belt;
A suction skirt installed at both sides of the inner surface of the skirt body unit to flow air for sealing the edge region of the belt in a non-contact manner;
And an air control unit for automatically turning on or off a flow of air flowing in the suction skirt in response to a temperature state of a vehicle supplied to the belt.
The method according to claim 1,
The suction skirt is installed on the inner circumferential surface of the wall, a hollow portion through which air flows is formed therein, a belt conveyor skirt device, characterized in that the inlet opening is formed in a line type opening along both edge regions of the belt.
The method according to claim 2,
An extension cover part extending downward is formed at the bottom of the suction skirt,
The suction port is formed on the inner side of the extension cover portion to be adjacent to the extension cover portion, characterized in that the belt conveyor of the belt conveyor characterized in that it is formed to narrow gradually in the direction of the hollow portion.
The method of claim 1, wherein the air control unit
A housing in which both ends communicate;
A first fixing member disposed at one side of the housing and having a first hole through which air flows;
A second fixing member disposed on the other side of the housing and having a second hole communicating with the first hole;
A variable member disposed between the first fixing member and the second fixing member and moved by a shape memory spring which is converted into a compressed shape at a temperature higher than a temperature set by the temperature state of the vehicle to open the second hole;
A self-control valve disposed between the variable member and the first fixing member and configured with a restoring spring that provides a restoring force to move the variable member in a direction of closing the second hole at a temperature below a temperature set by the temperature state of the vehicle. Skirt device of the belt conveyor comprising a.
The method of claim 4,
The shape memory spring is to be converted to a compressed shape in the hot state while moving the variable member to open the second hole, the feature is converted to the compressed shape in the cold state is removed the restoring spring The belt conveyor skirt device, characterized in that for closing the second hole by moving the variable member while being relaxed by the restoring force of the.
The method of claim 4,
The air control unit
A main pipe for sucking air;
A branch pipe branched from the main pipe and connected to the suction skirt while passing through the thermal box,
The self control valve is installed at a position embedded in the thermal box of the branch pipe is a skirt device of the belt conveyor, characterized in that the automatic opening and closing according to the temperature of the goods.

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