JP2023158477A - Belt conveyor dust collecting device - Google Patents

Abstract

To provide a belt conveyor dust collecting device equipped with a conveying chute that can increase the suction air speed to suck air into the conveying chute and prevent dust from falling from conveyed objects or scattering.SOLUTION: There are included a dustproof cover 2 that receives an outlet end part 11 of a belt conveyor 10 on which to-be-conveyed objects are loaded, a conveyance chute 3 that receives to-be-conveyed objects falling from the belt conveyor 10 and is connected to the dustproof cover 2 on the lower side of the dustproof cover 2, and a first dust collecting duct 34 that sucks dust inside the conveyance chute 3, in the belt conveyor dust collecting device, and the first dust collecting duct 34 is connected to a side plate 32 of the conveyance chute 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to a dust collection device for a conveyance chute provided at the exit end of a belt conveyor.

In Patent Document 1, a conveyance chute (head chute) and a hopper for collecting conveyed objects from the belt conveyor are arranged at the lower side of the exit end of the belt conveyor, and when the conveyed objects fall onto the head chute, A belt conveyor dust collection device is disclosed in which a dust collection duct for processing generated dust is connected to a hopper. In this dust collector, the dust generated when the transported object falls into the transport chute is sucked by the dust collecting duct, thereby preventing the transported object from falling and scattering.

Japanese Unexamined Patent Publication No. 50-35886

In Patent Document 1, the dust generated when the transported object falls into the transport chute is sucked by the dust collection duct to prevent the transported object from falling and the dust from scattering. It is connected. As a result, the distance from the entrance of the conveyance chute that receives conveyed items from the belt conveyor to the dust collection duct becomes long, so the suction air velocity to suck the objects into the conveyance chute is weak and it is necessary to sufficiently prevent dust generation. I couldn't do it. In addition, since the dust adhering to the belt could not be sufficiently suctioned, it was not possible to sufficiently prevent the conveyed objects from falling and scattering of the dust.

Therefore, the present invention has been made with attention to the above-mentioned problems, and is a conveyance system that increases the speed of suction air for suctioning into the conveyance chute and prevents the falling of the conveyed objects and the scattering of dust. The purpose of the present invention is to provide a dust collection device for a belt conveyor equipped with a chute.

One aspect of the present invention includes a dust-proof cover that receives the exit end of a belt conveyor on which conveyed objects are loaded, and a conveyance chute that receives conveyed objects that fall from the belt conveyor and connects to the dust-proof cover on the underside of the dust-proof cover. , a first dust collecting duct that sucks dust in the conveying chute, and the first dust collecting duct is a dust collecting device connected to the peripheral wall of the conveying chute. .

According to one aspect of the present invention, a dust collector for a belt conveyor equipped with a conveyance chute that can increase the suction wind speed for suctioning into the conveyance chute to prevent dust from falling and scattering of the conveyed objects equipment can be provided.

FIG. 1 is a perspective view showing a dust collector for a belt conveyor according to an embodiment of the present invention. FIG. 1 is a side view showing a dust collector for a belt conveyor according to an embodiment of the present invention. It is a figure which shows the flow analysis result of the dust collector of the belt conveyor when the chute part dust collection duct which concerns on embodiment of this invention is not installed. It is a figure showing the flow analysis result of the dust collection device of the belt conveyor when the chute part dust collection duct concerning an embodiment of the present invention is installed. It is a figure which shows the wind speed in the 1st opening part when the chute part dust collection duct which concerns on embodiment of this invention is not installed, and when it is installed.

The following detailed description describes embodiments of the invention with reference to the drawings. In the description of the drawings, the same or similar parts are given the same or similar symbols, and overlapping explanations are omitted. Each drawing is schematic and may differ from the actual drawing. In addition, the embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention. It is not specific to the following. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

The dust collection device for a belt conveyor according to the present embodiment includes a dust cover that receives the exit end of the belt conveyor on which objects are loaded, and a dust cover that receives objects that fall from the belt conveyor and is connected to the dust cover at the bottom of the dust cover. In the dust collection device for a belt conveyor, the dust collecting device includes a conveying chute for transporting the conveyor, and a first dust collecting duct for sucking dust in the conveying chute, the first dust collecting duct being connected to a peripheral wall of the conveying chute. It is a dust collector. Below, details of the dust collector for a belt conveyor according to this embodiment will be explained based on FIGS. 1 and 2.

FIG. 1 is a perspective view showing a dust collector 1 for a belt conveyor according to an embodiment, and FIG. 2 is a side view showing the dust collector 1 for a belt conveyor. The dust collector 1 is used for a belt conveyor 10. The belt conveyor 10 includes an exit end 11 and an inlet end (not shown). The dust collector 1 is arranged on the outlet end 11 side of the belt conveyor 10. The dust collector 1 includes a dust cover 2, a conveyance chute 3 disposed below the dust cover 2, and a dust collection hood 4 disposed above the dust cover 2. The dustproof cover 2 covers a part of the outlet end 11 of the belt conveyor 10.

A head pulley 12 is provided at each of the entrance end and the exit end 11 of the belt conveyor 10, and an endless belt is provided between the head pulley at the entrance end and the head pulley 12 at the exit end 11. An endless belt 13 is wound around it. In addition, the belt conveyor 10 is provided with a snap pulley 14 between the head pulley at the input end and the head pulley 12 at the exit end 11, and closer to the head pulley 12 at the exit end 11. . The snap pulley 14 is in contact with the outer peripheral surface 16 of the endless belt 13 on the lower stage side, and guides the endless belt 13 sent from the head pulley 12 upward. The belt conveyor 10 rotates the endless belt 13 by a drive device (not shown), thereby conveying the objects loaded on the outer circumferential surface 16 of the upper endless belt 13 from the input end to the exit end 11 side. . When the conveyed object conveyed by the endless belt 13 reaches the outlet end 11 of the belt conveyor 10, it falls downward from the outlet end 11.

The arrows shown in FIG. 1 indicate directions. In Figure 1, of the three visible surfaces, the right side is the left side or left side, and the side opposite the left side but not visible in Figure 1 is the right side or right side. Of the three sides that are visible, the left side is the front or front, the side opposite the front that is not visible in Figure 1 is the back or rear, and of the three visible sides, the upper side is the front. In the following explanation, the surface opposite to the top surface, which is not visible in FIG. 1, will be referred to as the bottom surface or lower side. The arrows shown in FIG. 2 also indicate directions. The left side in FIG. 2 is the front, the right side is the rear, the upper side is the upper side, the lower side is the lower side, the front side of the page of FIG. 2 is the left side, and the back side of the page of FIG. 2 is the right side. .

The dustproof cover 2 includes left and right side plates 20 and a rear rear plate 21, and has openings formed on the front side and the bottom side. Further, an opening is formed on the rear side of the upper surface, and a top plate 22 is provided on the front side. The opening on the front side, which is the side that receives the exit end 11 of the belt conveyor 10, has a second opening 23 for air intake on the upper side, and a conveyor that receives the exit end 11 of the belt conveyor 10 on the lower side. An opening 24 for use is provided. That is, the second opening 23 is arranged above the outlet end portion 11 of the belt conveyor 10. The conveyor opening 24 is located at a position deeper than the second opening 23, and parts of the upper and rear ends of the head pulley 12 of the outlet end 11 are covered by the left and right side plates 20. The width of the second opening 23 and the conveyor opening 24 in the left-right direction is larger than the width of the endless belt 13 in the left-right direction.

A conveyance chute 3 arranged below the dustproof cover 2 collects conveyed objects falling from the belt conveyor 10. The conveyance chute 3 has a cylindrical shape with openings formed on the upper side and the lower side, and includes a front front plate 31, left and right side plates 32, and a rear rear plate 33 as peripheral walls. The rear side of the opening formed above is connected to the opening on the lower side of the dustproof cover 2. An opening formed at the bottom is connected to a hopper (not shown). The front side of the opening formed on the upper side is located below the endless belt 13, and the opening formed on the front side is a first opening 30 described later. The center of the opening formed on the upper side in the front-rear direction is an opening that receives the head pulley 12 on the exit side tip 11 side.

The front plate 31 of the conveyance chute 3 is inclined downward toward the inside of the conveyance chute 3. The left and right side plates 32 serving as side walls have a substantially trapezoidal shape and are perpendicular to the rotation axis 15 of the head pulley 12. The oblique sides on the front side of the left and right side plates 32 are inclined along the inclination of the front plate 31 and are connected to the front plate 31. A suction port 35 to which a first dust collection duct 34 (described later) is connected is provided near the front of the left side plate 32. The suction port 35 is located at a position of 400 mm from the first opening 30 in the vertical direction. In the present embodiment, the position is 400 mm in the vertical direction from the first opening 30, but it may be located within 500 mm in the vertical direction from the first opening 30. Moreover, the position of the suction port 35 in the front-rear direction is preferably arranged so as to overlap the front plate 31 in the front-rear direction when viewed from the side plate 32 on the left side of the conveying chute 3. In this embodiment, the suction port 35 is provided on the left side plate 32, but it may be provided on the right side plate 32, or may be provided on the front plate 31 or the rear plate 33, which are other peripheral walls. I do not care. However, it is desirable to provide it at a position close to the first opening 30.

The first dust collection duct 34 is connected to a dust collector (not shown). Dust generated when the conveyed object falls into the conveyance chute 3 is sucked through the first dust collection duct 34 by a dust collector (not shown). The first opening 30 is an opening for taking in air to be sucked by the dust collector. Therefore, a suction force is generated in the first opening 30. The first opening 30 is disposed directly below the snap pulley 14 on the outside of the dustproof cover 2, and faces the outer peripheral surface of the lower stage of the endless belt. The width of the first opening 30 in the left-right direction is larger than the width of the endless belt 13 in the left-right direction, and a portion of the snap pulley 14 enters the first opening 30. In this embodiment, a part of the snap pulley 14 enters the first opening 30, but the snap pulley 14 does not need to enter the first opening 30, and is arranged to face the snap pulley 14. All you have to do is stay there.

Conventional belt conveyor dust collectors were unable to sufficiently suction the dust adhering to the endless belt. However, in the dust collector according to the present embodiment, the suction port 35 to which the first dust collection duct 34 is connected is provided on the side plate 32 that is the peripheral wall of the conveyance chute 3 . Therefore, since the distance between the opening formed on the upper side of the transport chute 3 and the suction port 35 can be shortened, the suction air speed for suctioning into the transport chute can be increased to remove falling powder and dust from the transported objects. It can prevent scattering. Further, a first opening 30, which is an opening for taking in air to be sucked by the dust collector, is arranged directly below the snap pulley 14. Therefore, the dust adhering to the endless belt 13 falls off from the endless belt 13 due to friction and vibration with the snap pulley 14 when it comes into contact with the outer peripheral surface 16 of the snap pulley 14, and the dust that falls off is directly below the snap pulley 14. The suction force generated at a certain first opening 30 causes the material to be sucked into the conveying chute.

The dust collection hood 4 arranged above the dustproof cover 2 is a hood for sucking upward the dust generated when the conveyed object falls into the conveyance chute 3, and has openings on the upper side and the lower side. is formed, and the opening on the lower side is formed in the shape of a square pyramid, which is larger than the opening on the upper side. An opening formed on the lower side of the dust collection hood 4 is connected to an opening on the upper side of the dustproof cover 2. The opening formed at the top is connected to a second dust collection duct 40, and the second dust collection duct 40 is connected to a dust collector (not shown). Dust generated when the conveyed object falls into the conveyance chute 3 is sucked through the second dust collection duct 40 by a dust collector (not shown). The second opening 23 on the front side of the dustproof cover 2 is an opening for taking in air to be sucked by the dust collector.

One feature of this embodiment is that the above-described suction port 35 to which the first dust collection duct 34 is connected is provided in the side plate 32 that is the peripheral wall of the conveyance chute 3. Furthermore, the first opening 30 is disposed directly below the snap pulley 14. Furthermore, a second opening 23 is arranged above the head pulley 12. That is, the second opening 23 is arranged above the exit end 11 of the belt conveyor 10, and the first opening 30 is arranged below the exit end 11 of the belt conveyor 10. The effect of the suction port 35 to which the first dust collection duct 34 is connected is provided in the side plate 32, which is the peripheral wall of the conveying chute 3, will be explained with reference to FIGS. 3 and 4.

3 and 4 show the results of flow analysis by simulation of a dust collector as a reference example and the dust collector 1 of this embodiment. FIG. 3 shows a flow analysis of a dust collector as a reference example in which the dust collection hood 4 is provided with the second dust collection duct 40 but the transport chute 3 is not provided with the first dust collection duct 34. shows. FIG. 4 shows a flow analysis of the dust collector 1 when the second dust collection duct 40 is provided in the dust collection hood 4 and the first dust collection duct 34 is provided in the transport chute 3.

As can be seen from FIG. 3, when the transport chute 3 is not provided with the first dust collection duct 34, the wind speed inside the second dust collection duct 40 in the dust collection hood 4 provided on the top of the dustproof cover 2 is As a result of performing suction at a speed of 20.0 m/s, the suction wind speed through the first opening 30 of the conveyance chute 3 did not reach 1.0 m/s, which is the general scattering speed of dust. On the other hand, as can be seen from FIG. As a result of performing suction with the wind speed inside the first dust collection duct 34 being 20.0 m/s, the suction wind speed at the first opening 30 of the conveyance chute 3 was 1.0 m/s or more, which is the general scattering speed of dust. It became. From this result, it can be seen that the dust collection device 1 in which the second dust collection duct 40 is provided in the dust collection hood 4 and the first dust collection duct 34 is provided in the transport chute 3, 40 is provided, but the suction wind speed of the first opening 30 is higher than that of the dust collector 1 when the first dust collection duct 34 is not provided in the conveyance chute 3, so it is effective in suctioning dust. I found out something.

Next, using the graph of FIG. 5, flow analysis results by simulation and demonstration results by actual equipment will be shown for the dust collector as a reference example and the dust collector 1 of this embodiment. As a result of implementing the dust collector 1 of this embodiment in an actual machine, the average suction wind speed of the first opening 30 was approximately the same value as the flow analysis based on the simulation. At this time, the wind speed inside the second dust collection duct 40 and the first dust collection duct 34 of the actual machine was adjusted to be about 20.0 m/s, as in the analysis.

Although the embodiments have been described above with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 1...Dust collector, 2...Dust cover, 3...Transportation chute, 4...Dust collection hood, 10...Belt conveyor, 11...Output end, 12...Head pulley, 13...Endless belt, 14...Snap pulley, DESCRIPTION OF SYMBOLS 15... Rotating shaft, 16... Outer peripheral surface, 20... Side plate, 21... Rear plate, 22... Top plate, 23... Second opening, 24... Conveyor opening, 30... First opening, 31... Front plate, 32... Side plate, 33... Rear plate, 34... First dust collection duct, 35... Suction port, 40... Second dust collection duct

Claims (7)

A dustproof cover that receives the exit end of the belt conveyor that loads conveyed items;
a conveyance chute that receives conveyed objects falling from the belt conveyor and connects to the dustproof cover on the lower side of the dustproof cover;
A dust collection device for a belt conveyor, comprising a first dust collection duct that sucks dust in the conveyance chute,
A dust collection device for a belt conveyor, wherein the first dust collection duct is connected to a peripheral wall of the conveyance chute. 2. The dust collection device for a belt conveyor according to claim 1, wherein a first opening for air intake is formed on the outer side of the dustproof cover on the upper surface of the conveyance chute. The dust collecting device for a belt conveyor according to claim 2, wherein the first dust collecting duct is connected to the peripheral wall of the conveyance chute at a position within 500 mm from the first opening. The belt conveyor includes an endless belt,
The dust collection device for a belt conveyor according to claim 3, wherein the first opening faces an outer circumferential surface of a lower stage side of the endless belt. The belt conveyor includes a head pulley disposed at the exit end of the belt conveyor, and a snap pulley that guides the endless belt sent from the head pulley upward.
The dust collector for a belt conveyor according to claim 4, wherein the first opening is located directly below the snap pulley. The peripheral wall of the conveying chute has a side wall perpendicular to the rotation axis of the head pulley,
The dust collection device for a belt conveyor according to claim 5, wherein the first dust collection duct is connected to the side wall. comprising a dust collection hood located above the dust cover and connected to the dust cover, and a second dust collection duct connected to the dust collection hood,
The dust collector for a belt conveyor according to any one of claims 1 to 6, wherein a second opening for air intake is formed on the receiving side of the outlet end of the dustproof cover.

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