KR101904148B1 - Wind selector for adjusting flow velocity - Google Patents

Abstract

According to an embodiment of the present invention, the present invention relates to a wind power selector capable of regulating a flow rate, which comprises: a selecting drum unit which is positioned in the lower part of a dropping conveyor unit receiving and transferring objects, and includes a selecting drum for selecting the objects; a withdrawing conveyor unit which is connected with the selecting drum unit in order to receive and discharge a portion of the objects selected by the selecting drum unit; and an intake blowing unit which is placed adjacent to the selecting drum unit in order to send air to the selecting drum unit and suck and circulate the air. A circulation blowing unit of the intake blowing unit includes a blowing nozzle module which is positioned to discharge air to the withdrawing conveyor unit and can regulate the wind direction. Therefore, the wind power selector capable of regulating a flow rate can prevent degradation of selecting efficiency and work environment by adding a device for regulating an appropriate operation range by adjusting the inlet and position of the nozzle while maintaining the same air volume.

Description

[0001] WIND SELECTOR FOR ADJUSTING FLOW VELOCITY [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wind speed discriminator capable of controlling a flow speed, and more particularly, to a wind speed discriminator capable of controlling the flow rate of an object to be mixed with materials using wind power.

If classification is successful at the time of collection of waste and waste, it is possible to reduce pollutants from landfill or combustion, but to date, classification of waste is not satisfactory at the time of collection.

Accordingly, municipal waste or industrial wastes are sorted and disposed of before landfill or combustion in landfills or openings. Classification before burning or landfill is limited and only some sort of classification by operators is done, and the rest are just buried or burnt.

In municipal wastes or industrial wastes which are subjected to the above sorting operations by burning or landfilling, they contain a large amount of vinyl or plastic that can be used as solid fuel, and also considerably contains recycled materials such as metals. Solid fuel products such as vinyl or plastic are called SRF (SOLID REFUSE FUEL).

SRF is a renewable energy source and renewable energy resource that is superior to alternative fuels and heating fuels of industrial and public institutions because it has higher calorific value and lower price than anthracite coal. Recently, local governments are increasingly using SRF as heating fuel.

However, it is time-consuming and labor-intensive to classify non-combustible materials such as metals and stones mixed in municipal waste or industrial waste into waste. Accordingly, an automatic sorting machine for sorting garbage using wind power has been introduced.

Conventional devices for classifying nonflammable materials using wind power have not been able to accurately separate some of the nonflammable materials, depending on their weight. In addition, it is impossible to separate incombustible materials that do not react with magnetism, such as stone, by using an existing magnetic force to classify nonflammable materials in steel products.

Open No. 10-2016-0079506 discloses a fuel material sorting apparatus using wind power. Such a fuel material sorting device using wind power can easily separate combustible materials such as steel materials and stones mixed in municipal wastes or industrial wastes in a short period of time and then select combustible materials to secure materials that can be manufactured as solid fuel products .

The sorting drum installed in the wind energy sorter of the fuel material sorting apparatus using wind power is a device for minimizing the waste of waste falling from the input conveyor due to gravity.

At this time, the relatively light combustible material is transferred into the wind power sorter by the wind supplied before and after the collision with the selection drum, but the heavy nonflammable material is discharged down to the bottom.

The nozzle installed in the wind-powered sorter is a device necessary to blow the waste falling from the input conveyor into the wind-powered sorter using the air supplied from the blower.

These nozzles can supply the appropriate air to the waste falling from the input conveyor to transport relatively light waste into the wind turbine, and determine the flow rate and position of the air supplied to the wind turbine.

The amount of combustible material selected will depend on the air velocity and location. That is, when the blowing flow rate of the nozzle is low, the leakage efficiency of the combustible material is increased and the sorting efficiency is remarkably lowered. On the other hand, when the flow velocity is large, the foreign matter discharged from the rear end through the wind power sorter is increased, which may worsen the working environment.

The present invention provides a wind turbine control apparatus capable of adjusting the flow rate by preventing the deterioration of the screening efficiency and the working environment by adding a device capable of adjusting an appropriate operating range by adjusting the inlet and the position of the nozzle while maintaining the same air volume .

Another embodiment of the present invention is to provide a wind power sorter capable of controlling the flow rate by minimizing the generation of scattered dust by shutting off the air flow escaping to the rear end.

A wind speed selector capable of controlling the flow rate according to an embodiment of the present invention includes a delivery conveyor unit configured to deliver an object and discharge the object downward; A carry-out conveyor unit disposed horizontally spaced apart from a delivery position of the object of the delivery conveyor unit, for picking up and taking out some of the objects; A sorting drum unit located on the carry-out conveyor unit and having a sorting drum for sorting a part of the objects to be dropped from the delivering conveyor unit by the weight and for feeding the objects onto the carry-out conveyor unit; And a conveying unit disposed on the conveying unit and configured to suck dust generated on the conveying conveying unit to block the dust from flowing out of the dust conveying unit, Wherein the suction air blowing unit includes a dust suction main body that is blown and capable of dust suction, a dust suction unit that provides a suction force to the dust suction main body, A suction duct connected to the suction unit, and a circulation blower unit connected to the suction duct to suck air sucked and circulated to the dust suction main body, wherein the circulation blower unit is configured to discharge air to the discharge conveyor unit And an airflow nozzle module It is provided.

The circulating blower may include: a circulating blower main body in which the suction duct is supported; An air blowing module mounted on the circulating air blowing main body and configured to connect the air suction port to the suction duct to suck from the suction duct and pressurize and discharge the air into the air discharge port; And a blowing pipe connecting the air outlet port of the blowing module to the blowing nozzle module so as to discharge air onto the carry-out conveyor unit.

A nozzle body having a nozzle outlet portion sloped upward and a nozzle outlet portion being formed to be gradually smaller, a width of the nozzle outlet portion being kept constant, and connected to the blowing pipe and being rotatable; A wind speed adjusting plate disposed along the width direction of the nozzle body and configured to be vertically rotatable on the nozzle outlet; And a wind direction adjusting unit connected to the nozzle body and configured to rotationally move the nozzle exit unit.

Wherein the dust suction main body is provided with a flow guide portion for guiding the air flow from the lower rear end to the upper front side, the flow guide portion is in the form of a panel arranged up and down along the width direction of the dust suction body, And may have a curved surface concave toward the upper rear end side of the suction main body.

Wherein the delivery conveyor unit and the carry-out conveyor unit are disposed so as to be inclined upward, and one end of each of the delivery conveyor unit and the carry-out conveyor unit adjacent to each other in the vertical direction is spaced apart in the horizontal direction, The sorting drum of the sorting drum unit is positioned between the horizontally spaced points, and the sorting drum is configured such that a lightweight portion of the objects to be dropped from the delivering conveyor unit is lifted up and put down on the carry- .

Wherein the dust suction main body has a blowing opening at one end thereof so as to blow air from the circulated blowing part and is formed so as to be sloped like the carrying conveyor, The dust suction main body may be constituted by an inclined suction part arranged corresponding to the inclined conveyor and a horizontal suction part corresponding to the horizontal conveyor and blocked against the blowing opening.

The above-described embodiment of the present invention can prevent the screening efficiency and deterioration of the working environment by adding a device capable of adjusting an appropriate operation range by adjusting the inlet and the position of the nozzle while maintaining the same air volume.

Another embodiment of the present invention is characterized in that the point where the waste falls on the conveying belt by the gravity by the gravity of the wind power separator is provided with a flow guide part in the form of a partition at the end of the wind power sorter, The occurrence can be minimized.

1 is a conceptual diagram of a wind turbine capable of controlling a flow rate according to an embodiment of the present invention.
2 is a blowing nozzle module of Fig.
3 is a conceptual diagram in which a flow guide portion is added to Fig.
4 is a flow guide of Fig.

Various embodiments of the present invention will now be described by way of specific embodiments illustrated in the accompanying drawings. The differences in the embodiments are to be understood as mutually exclusive matters, and the specific shapes, structures, and characteristics described in connection with one embodiment may be embodied in other embodiments without departing from the spirit and scope of the present invention .

It is to be understood that the position or arrangement of the individual components in accordance with embodiments of the present invention may be varied and that like reference numerals may be used to indicate like or similar features throughout the various aspects, The form may be exaggerated for ease of explanation.

The direction and position of the drawing are described assuming an XYZ Cartesian coordinate system. The top, bottom, right and left coincide with the XY coordinate plane system, and the front, rear, left and right coincide with the YZ coordinate plane system. In the drawings of the embodiments, each unit, module, section, and member, in which the lower elements are not described, is assumed to include conventional sub-elements for having respective assigned functions, and is not limited to the sub- . It is to be understood that the components shown and described are generally included in the embodiments.

The terms used shall be understood to have the traditional meaning of Chinese characters, national language, or English, except those specifically defined, or to have attributes consistent with the terms used in the field. It is to be understood that " comprising, comprising, or having " means having more than one of the other components, " fixed and constrained " And can be moved by the user.

As shown in FIGS. 1 and 2, a wind speed selector capable of controlling the flow rate according to an embodiment of the present invention is configured to sort some recyclable objects usable as fuel from objects such as waste wastes, A sorting drum unit 110 having a sorting drum 112 for sorting objects is disposed under a delivery conveyor unit 100 to be fed and received and a part of the selected objects is picked up from the sorting drum unit 110 A suction blowing unit 130 which is connected to the sorting drum unit 110 and is capable of sucking and circulating the blowing air and blowing air onto the sorting drum unit 110 is disposed in the sorting drum unit 110 ).

The objects to be dropped from the drop conveyor unit 100 are waste wastes and light objects are moved onto the unloading conveyor unit 120 by the sorting drum unit 110 and heavy objects are moved to the sorting drum unit 110, Or it can be dropped and processed as it is.

At this time, the combustible objects of some of the objects are lighter than those of other non-combustible objects because they are heavier than the dried objects with moisture, but are removed by the selection drum 112 of the selection drum unit 110 Conveyed onto the conveyor unit 120, and can be taken out to a point for recycling.

 The delivery conveyor unit 100 is a conveyor configured to convey an object and discharge it downward. This drop conveyor unit 100 can be connected to a place where garbage wastes are gathered.

The carry-out conveyor unit 120 is horizontally spaced apart from the discharge position of the object of the delivery conveyor unit 100, and is a conveyor for receiving and taking out some of the objects.

The take-out conveyor unit 120 is disposed below the delivering conveyor unit 100 and takes out some of the objects selected by the blowing and sorting drum unit 110 to the outside of the sorting place.

The delivering conveyor unit 100 and the unloading conveyor unit 120 are arranged so as to be inclined upwardly and one end of each of the unloading conveyor unit 100 and the unloading conveyor unit 120 which are adjacent to each other in the up and down direction, The selection drum 112 of the sorting drum unit 110 is positioned between the unit 100 and the horizontally spaced points of the carry-out conveyor unit 120. [

The carry-out conveyor unit 120 is composed of a warp conveyor 121 and a horizontal conveyor 122, and a conveyor drive unit is located at an end of the horizontal conveyor 122.

The drop conveyor unit 100 moves the objects upward sloping downward and the slope conveyor 121 of the take-out conveyor unit 120 receives a part of the objects selected by the blowing and sorting drum 112, Can be moved. At this time, the horizontal conveyor 122 is connected to the inclined conveyor 121 so that the selected objects can be taken out to the outside.

After the delivery conveyor unit 100 and the carry-out conveyor unit 120 are installed in the oblique direction, the objects to be horizontally spaced with the sorting drum unit 110 interposed therebetween, Relatively lightly combustible objects are selectively flowed into and out of the carry-out conveyor unit 120 and some of the light objects in contact with the selection drum 112 are also sorted by the frictional force onto the carry-out conveyor unit 120 do.

The inclined installation of the delivery conveyor unit 100 and the carry-out conveyor unit 120 helps heavy objects of heavy weight, which are difficult to convey in the oblique direction, to be sorted by gravity.

The sorting drum unit 110 is located on the carry-out conveyor unit 120 and selects a part of the objects to be dropped from the delivering conveyor unit 100 by the rotation of the sorting drum 112 according to the weight, 120).

The sorting drum unit 110 may be arranged to have a width equal to the width of the delivering conveyor unit 100 and the carry-out conveyor unit 120. The sorting drum unit 110 may convey light objects from the objects that can not be sorted by blowing, ). ≪ / RTI >

The sorting drum unit 110 includes a drum main body 111 fixed to one end of the carry-out conveyor unit 120, a discriminating drum 112 rotatably disposed on the drum main body 111, And a drum driving part 117 connected to the drum to drive the rotary drum body 111 and fixed to the lower part of the rotary drum body 111.

The drum driving unit 117 rotates the discriminating drum 112 mounted on the drum body 111. The discriminating drum 112 rotates so that a light object dropped among the objects is conveyed to the conveying unit 120, As shown in FIG. That is, objects of relatively low density, which are contaminated or compressed by some of the moisture, are filtered onto the carry-out conveyor unit 120 while being contacted with the selection drum 112.

 The sorting drum 112 can be set to rotate in such a manner that a lightweight portion of the objects to be dropped by the delivering conveyor unit 100 is lifted up and placed on the carry-out conveyor unit 120.

The suction air blowing unit 130 is located along the take-out conveyor unit 120 and is configured to suck dust generated on the carry-out conveying unit 120 to block dust from flowing to the outside, The conveying unit 120 is provided so as to provide air sucked with the dust to the upper part of the conveying unit 120, and is adjustable in the wind direction and speed on the conveying unit 120.

The suction air blowing unit 130 includes a dust suction main body 131 that is blown and capable of dust suction, a dust suction portion 138 that provides a suction force to the dust suction main body 131, a dust suction portion 138, And a circulation blowing unit 140 connected to the suction duct 139 and blowing air sucked and sucked to the dust suction main body 131.

The dust suction unit 138 is fixed in position corresponding to the suction area 135 provided at the upper part of the dust suction main body 131 and connected to the suction opening 132 through the suction area 135 and the suction space 133. [ Lt; / RTI >

The suction duct 139 is located above the dust suction main body 131, and a plurality of dust suction units 138 are connected together. The circulation blowing unit 140 is connected to the suction duct 139 to apply a suction force to the suction duct 139 and blows the air sucked through the suction duct 139 onto the selection drum 112.

The dust suction main body 131 is positioned such that the delivery conveyor unit 100 is disposed in the upper portion.

The suction opening 132 of the dust suction main body 131 is provided in the bottom portion of the dust suction main body 131. The suction opening 132 is constituted by one long opening in the bottom portion of the dust suction main body 131 so as to be disposed along the take-out conveyor unit 120.

A suction space 133 is formed along the carry-out conveyor unit 120 at an upper portion of the suction opening 132 and a suction area 135 is formed at an upper portion of the dust suction body 131 corresponding to the suction space 133 do.

The dust suction main body 131 has a blowing opening at one end thereof so as to blow air from the circulating blowing part 140 and is formed to be sloped like the carrying conveying unit 120. The dust suction main body 131 may be constituted by the inclined suction portion 136 arranged corresponding to the inclined conveyor 121 and the horizontal suction portion 137 corresponding to the horizontal conveyor 122 and blocked against the blow opening.

The circulation blowing unit 140 is installed in the circulation blowing main body 141 and the circulation blowing main body 141 in which the suction duct 139 is supported and the air suction port is connected to the suction duct 139, An air blowing module 142 configured to suck the air to the air discharge port and to discharge the air to the air discharge port and a blowing pipe 149 connected to an air discharge port of the blowing module 142 to discharge air onto the discharge conveying unit 120 145).

1 and 2, the blowing nozzle module 145 may include a nozzle body 146, a wind speed adjusting plate 147, and a wind direction adjuster 148. The nozzle body 146 is configured such that the nozzle outlet 144 is upwardly inclined and the nozzle outlet 144 is gradually narrowed so that the width of the nozzle outlet 144 is kept constant, It is connected. The blowing pipe 149 may be a flexible bellows made of a metal.

The nozzle body 146 is configured to be vertically rotatable. A shaft for rotation can be coupled to the nozzle body 146, and the shaft can be fixed to a frame supported on the ground. The nozzle body 146 can be rotated and fixed by the wind direction adjuster 148 described later, and the upward and downward inclined position of the nozzle outlet 144 can be adjusted. The wind direction adjuster 148 is configured to rotate the nozzle outlet 144.

Inside the nozzle body 146, a wind speed adjusting plate 147 is formed. The wind speed adjusting plate 147 is disposed along the width direction of the nozzle body 146 and is vertically rotatably movable on the nozzle outlet 144 so as to adjust the opening degree of the nozzle outlet 144 along the up- And adjusts the air discharge speed of the nozzle outlet portion 144.

The discharge speed of the air discharged from the upper portion of the nozzle body 146 can be adjusted by the wind speed adjusting plate 147. When the wind speed adjusting plate 147 is rotated upward, the nozzle outlet portion 144 is narrowed to increase the discharge speed of the air. When the wind speed control plate 147 is rotated downward, the nozzle outlet portion 144 is widened, .

The wind speed adjusting plate 147 may be configured to adjust a position automatically rotated by a step motor connected to the rotating shaft of the wind speed adjusting plate 147 and a controller for controlling the position of the step motor.

The wind direction adjuster 148 is provided to fix the rotated position of the exposure outlet 144 by rotating the nozzle body 146. The wind direction adjuster 148 is connected to the upper surface of the nozzle body 146, A turnbuckle capable of adjusting the length can be used.

For example, in the case where the wind power of the suction blowing unit 130 is limited, and the objects to be dropped by the delivery conveyor unit 100 are mixed with relatively combustible objects, if contamination by moisture is severe, It can not be dropped to the selection drum 112 side or contact with the selection drum 112, and can be directly discharged as it is.

At this time, when the nozzle outlet portion 144 is rotated and fixed by the air flow direction control unit 148, the air discharge direction of the nozzle body 146 is further moved upwardly of the nozzle body 146. [ When the wind speed adjusting plate 147 is rotated upward, the nozzle outlet 144 is narrowed and the discharge speed of the air can be increased.

Accordingly, the direct dropping point of the objects is moved closer to the rotation center line of the selection drum 112 than the existing state, so that the combustible objects to be selected in the limited wind power state are further dropped onto the carry-out conveyor unit 120 And can be moved onto the take-out conveyor unit 120 by friction with the pick-up drum 112 side.

3 and 4, at the rear end of the dust suction main body 131, a flow guide 155 for guiding the air flow from the lower rear end to the upper front side is provided.

The flow guide portion 155 may have a curved surface shape that is concave toward the upper rear end side of the dust suction main body 131 in the form of a panel arranged up and down along the width direction of the dust suction main body 131.

It is necessary to continuously supply air to induce flammable waste into the dust suction main body 131. [ According to the present embodiment, a dust suction unit 138 capable of collecting air is installed in an upper portion of the dust suction main body 131 to minimize the wind that escapes to the outside. The dust suction unit 138 is connected to the dust suction main body 131 in the form of a hood. The dust suction portion 138 of the suction air blowing unit 130 is configured to induce the suction of air from the upper portion of the dust suction body 131 to circulate the air.

The air injected from the blowing nozzle module 145 is supplied to the inside of the dust suction main body 131 so that a light object capable of burning by applying wind force to the objects is dropped into the dust suction main body 131 and collected by the carrying conveyor unit 120 do.

Some of the air supplied through the blowing nozzle module 145 may escape from the rear end of the wind turbine by an inertial force to cause scattered dust. However, the flow guide 155 at the rear of the dust suction main body 131, This can be prevented by guiding the flow of air from the rear bottom to the top.

Assuming that the objects are dropped on the dropping conveyor unit 100 onto the selection drum 112 side, the selection drum 112 is rotationally driven, the blowing nozzle module 145 is operated, and the carry-out conveyor unit 120 is operated, The objects are selected by the blowing of the blow nozzle module 145 and dropped onto the carry-out conveyor unit 120 while the other part is filtered by the frictional force of the sorting drum 112 and moved to the carry-out conveyor unit 120.

The suction force is applied to the suction opening 132 of the dust suction main body 131 to remove dust and dust from the dust suction main body 131. In this case, the discharge conveyor unit 120 removes the objects selected on the discharge conveyor unit 120, Air may be pressurized by the air blowing module 142 through the dust suction unit 138 and the duct and then discharged from the air blowing nozzle module 145 and may be applied to the objects.

The dust generated when the object is subjected to the sorting process by the air blowing and sorting drum 112 can be used while being cleaned together with the air by the suction air blowing unit 130. In the state where the outflow is almost shut off, A relatively clean working environment is maintained and pollution of the external environment by dust can be prevented.

Meanwhile, the air circulation path of the suction air blowing unit 130 may be provided with a filter unit (not shown) capable of removing the dust, and the filter unit may be configured to be cleaned by the reverse air to remove the dust.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Deletion, addition or the like of the present invention may be variously modified and changed within the scope of the present invention.

100: Drop-off conveyor unit 110: Selective drum unit
111: drum body 112: selection drum
117:
120: carry-out conveyor unit 121: inclined conveyor
122: Horizontal conveyor 130: Suction blowing unit
131: dust suction main body 132: suction opening
133: Suction passage 135: Suction area
136: oblique suction part 137: horizontal suction part
138: dust suction portion 139: suction duct
140: circulating blower 141: circulating blower main body
142: blower module 144: nozzle outlet
145: blowing nozzle module 146: nozzle body
147: Wind speed adjusting plate 148: Wind direction adjusting unit
149: blowing pipe 155:

Claims (6)

A delivery conveyor unit configured to convey the object and discharge it downward;
A carry-out conveyor unit disposed horizontally spaced apart from a delivery position of the object of the delivery conveyor unit, for picking up and taking out some of the objects;
A sorting drum unit located on the carry-out conveyor unit and having a sorting drum for sorting a part of the objects to be dropped from the delivering conveyor unit by the weight and for feeding the objects onto the carry-out conveyor unit; And
Conveying unit, and is configured to suck dust generated on the carry-out conveyor unit to block the dust from leaking out of the dust, wherein the dust is conveyed to the upper part of the pick-up conveyor unit And a suction blower unit configured to provide sucked air,
Wherein the suction air blowing unit includes a dust suction body including a plurality of suction openings formed on the bottom surface portion along the carry-out conveyor unit so as to allow air to be blown and to be dust-suctioned and having a suction space at each of upper portions of the suction openings, A dust suction unit connected to the dust suction unit, and a suction duct connected to the dust suction unit, and air sucked and sucked into the dust suction unit is blown to the dust suction unit. And a circulating blower circulating the circulating blower,
Wherein the circulation blowing unit is provided with a blowing nozzle module positioned to discharge air onto the take-out conveying unit and configured to adjust the wind direction,
The nozzle unit includes a nozzle body having an upwardly inclined nozzle outlet portion, a nozzle body having a nozzle outlet portion formed to be gradually smaller in width, a nozzle body connected to the blowing tube and rotatable, A wind speed adjusting plate disposed along the width direction of the nozzle body and configured to be vertically rotatable on the nozzle outlet; A motor connected to the rotating shaft of the wind speed adjusting plate to drive the wind speed adjusting plate to control the position of the wind speed adjusting plate; And a wind direction adjusting unit connected to the nozzle body and configured to rotate the nozzle outlet unit. The method according to claim 1,
Wherein the circulating blower comprises:
A circulation blowing main body in which the suction duct is supported;
An air blowing module mounted on the circulating air blowing main body and configured to connect the air suction port to the suction duct to suck from the suction duct and pressurize and discharge the air into the air discharge port; And
And a blowing pipe connecting the air discharge port of the blow module to the blow nozzle module to discharge air onto the carry-out conveyor unit. delete 3. The method of claim 2,
Wherein the dust suction main body is provided with a flow guide portion for guiding the air flow from the lower rear end to the upper front side, the flow guide portion is in the form of a panel arranged up and down along the width direction of the dust suction body, A wind turbine having a curved shape recessed towards the upper rear end side of the suction main body and capable of controlling the flow rate. 3. The method of claim 2,
Wherein the delivery conveyor unit and the carry-out conveyor unit are disposed so as to be inclined upward, and one end of each of the delivery conveyor unit and the carry-out conveyor unit adjacent to each other in the vertical direction is spaced apart in the horizontal direction, The sorting drum of the sorting drum unit is positioned between the horizontally spaced points, and the sorting drum is configured such that a lightweight portion of the objects to be dropped from the delivering conveyor unit is lifted up and put down on the carry- Wind turbine wind turbine. 6. The method of claim 5,
Wherein the dust suction main body has a blowing opening at one end thereof so as to blow air from the circulating blowing part,
Wherein the transporting conveyor unit is constituted by a warp conveyor and a horizontal conveyor, and a conveyor driving unit is positioned at an end of the horizontal conveyor,
Wherein the dust suction main body comprises an inclined suction portion disposed corresponding to the inclined conveyor and a horizontal suction portion corresponding to the horizontal conveyor and closed against the blowing opening.

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