JP2001088923A - Pneumatically floating type belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an amount of dust carried away by exhausting air for belt flotation by reducing flotation and scatter of the dust from an item to be conveyed. SOLUTION: In this pneumatic floating type belt conveyor 1, a belt 10 put over between a head pulley 8 and a tail pulley 9 is floated in a carrier side through 2 and a return side trough 3 by pneumatic pressure supplied thereto to travel the belt 10, and a carrier side belt 10a conveys the item while the air for belt flotation supplied to the inside of the respective troughs 2, 3 is exhausted outside. An exhaust circulating space in the carrier side trough 2 is divided in the longitudinal direction thereof by a pass partition plate 40 to form a block S, and a connecting duct 50 is mounted between the block S of the exhaust circulating space in the carrier side trough 2 and an exhaust circulating space in the return side through 3 for letting the exhaust in the block S flow to the exhaust circulating space in the return side trough 3, and the exhaust gas from the block S in the carrier side trough 2 is exhausted to the outside through the return side trough 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-floating belt conveyor device for transporting, for example, coal or other granular material as a conveyed material, and more particularly, to reducing the floating and scattering of dust on the conveyed material to reduce the air for levitation. The present invention relates to an air-floating belt conveyor capable of reducing the amount of dust carried away by exhaust air.

[0002]

2. Description of the Related Art Heretofore, in a pneumatic levitation type belt conveyor device, belt levitation air supplied into a carrier side belt support trough and a return side belt support trough to lift a belt is used as a head pulley of each trough. The air was exhausted to the outside (atmosphere) by extracting from the side end opening and the tail pulley side end opening. In recent years, due to environmental problems, it is necessary to prevent the dust of the conveyed material from leaking into the atmosphere due to environmental problems. Discharges to the public are increasing.

[0003]

As described above, in the air levitation type belt conveyor in which the air for floating the belt is extracted to the outside through the end opening near the head pulley and the end opening near the tail pulley of each trough, When the air levitation belt conveyor is a long-distance belt conveyor, when the conveyor-side belt-supporting trough on the side that conveys the conveyed goods is a small cross-sectional area, or when the conveyor speed is high. In particular, at the portion near the tail pulley in the carrier-side belt support trough, the apparent relative speed of the exhaust air velocity increases because the exhaust air direction and the transport direction of the conveyed object are opposite, and The conveyed material on the belt is swept up by the exhaust air, and becomes exhaust air having a high dust concentration. For this reason,
It requires a large capacity of a dust collector installed in an exhaust extraction line (exhaust device). In addition, when the capacity of the dust collector cannot be increased as described above, deterioration of the exhaust air becomes a problem.

[0004] When exhausting the air for lifting the belt from both sides of the troughs on the head pulley side and the tail pulley side, when no partition plate is provided in the trough, the amount of exhaust air passing through the trough is reduced by the conveyor. The number increases from the center in the longitudinal direction to both end surfaces on the head pulley side and the tail pulley side, and reaches a maximum on both end surfaces (end openings) of the trough. For this reason, in the carrier-side belt support trough, the amount of dust soaring at the end surface of the trough on the side of the tail pulley where the direction of conveyance of the conveyed product and the direction of flow of the exhaust gas are opposite is maximized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional air-floating belt conveyor, and reduces the floating and scattering of the dust of the conveyed material, thereby removing the dust that is carried away by exhausting the belt floating air. It is an object of the present invention to provide an air-floating belt conveyor capable of reducing the amount.

[0006]

In order to achieve the above object, an air-floating belt conveyor according to the present invention has the following configuration.

(1) In the carrier side belt support trough,
The exhaust flow space in the carrier-side belt support trough is partitioned by a partition plate in the longitudinal direction of the trough to form a section, and the exhaust-flow space in the carrier-side belt support trough and the exhaust flow in the return-side belt support trough are formed. A connection duct for flowing the exhaust of the section to the exhaust flow space in the return-side belt support trough is installed between the space and the space, and the exhaust exhausted from the section in the carrier-side belt support trough passes through the return-side belt support trough. It was configured to exhaust to the outside.

(2) In the air-floating belt conveyor of the above (1), the partition plate is attached to the end on the head pulley side and the end on the tail pulley side of the exhaust circulation space in the carrier-side belt support trough, and both ends are provided. At least one section is formed in the exhaust flow space in the carrier-side belt support trough by attaching at least one exhaust flow space in the exhaust-flow space between the partition plates on the side of the section, and the exhaust flow flow in the return-side belt support trough is formed. A separate partition plate is attached to the space to form two sections in the longitudinal direction, between each section of the exhaust flow space of the carrier-side belt support trough and each section of the exhaust flow space of the return-side belt support trough. Connecting duct for allowing the exhaust of each section of the carrier-side belt support trough to separately flow into each section of the return-side belt support trough Respectively attached, and a structure attached by connecting an exhaust pipe for each exhausting the floating air to the outside end of the head pulley end of the return side belt bearing trough and Terupuri side.

(3) In the air-floating belt conveyor according to the above (1) or (2), the exhaust inflow port of the connection duct attached to the section of the carrier-side belt support trough is connected to the carrier-side belt support trough. The partition was formed at a position close to the partition located closer to the head pulley among the partitions on both sides in the longitudinal direction of the trough forming the section.

(4) In the carrier-side belt support trough and the return-side belt support trough, partition plates for partitioning the exhaust circulation space in the belt support trough in the longitudinal direction of the trough are respectively provided in the carrier-side belt support trough. And at least one of the partition plates at both ends are attached to the end on the head pulley side and the end on the tail pulley side, so that at least two partitions are provided in the exhaust flow space in both belt support troughs in the longitudinal direction. To form
An exhaust port for exhausting levitation air to the outside is attached to each section of the two belt support troughs.

(5) In the air-floating belt conveyor of (4), the exhaust ports attached to each section of the carrier-side belt-supporting trough are formed of the partition plates on both longitudinal sides of the trough forming the section. It was configured to be mounted at a position close to the partition plate located near the head pulley.

[0012]

In the air-floating belt conveyor having the above configuration (1), a partition is formed by a partition plate at a predetermined position in the exhaust circulation space in the carrier-side belt support trough. This section is formed, for example, at a position closer to the tail pulley side in the exhaust flow space of the carrier-side belt support trough. That is, the partition is attached at a position closer to the tail pulley side of the exhaust circulation space of the trough, with one partition plate forming the partition being separated from the end opening on the tail pulley side of the carrier side belt support trough by a predetermined distance. The partition plate is formed by attaching the partition plate to a side opposite to the tail pulley (head pulley side) at a predetermined distance from the one partition plate. The exhaust gas flowing through the exhaust circulation space of the section is exhausted to the return belt support trough through the connection duct, and is exhausted to the outside of the belt conveyor together with the exhaust of the return belt support trough through the return belt support trough.

[0013] Then, the belt floating exhaust air flowing through the exhaust circulation space on the tail pulley side and the belt floating flowing through the exhaust circulation space on the head pulley side, adjacent to the section in the carrier side belt support trough in the longitudinal direction of the trough. The exhaust of the air for air and the exhaust of the air for lifting the belt supplied into the return-side belt support trough are to the outside (atmosphere) through the end opening on the head pulley side and the end opening on the tail pulley side of each trough. Exhaust.

Here, the exhaust circulation space is a space above a conveyed object placed on a carrier belt in the trough in the carrier side belt support trough, and is a space in the trough in the return side belt support trough. This is the space above the return side belt.

In the air-floating type conveyor according to the present invention, a large number of belt-floating air supply ports are provided at substantially the same length in the longitudinal direction of the trough (the running direction of the belt) at the bottom of the trough so as to float the belt. Air is uniformly supplied between the inner wall surface of the trough and the lower surface of the belt through the respective air supply ports in the longitudinal direction of the trough to form an air film therebetween, and the air for floating is formed between the inner wall surface of the trough and the belt. By passing the belt between the lower surfaces and discharging the belt upward from both end surfaces in the width direction of the belt into the trough space, the belt is evenly floated over the entire length. As a result, belt running can be smoothed.

[0016] For this reason, the exhaust circulation space of the section, the exhaust circulation space of the tail pulley adjacent to the section (partition plate on one tail pulley side of the partition plates forming the section), and the section (section). The belt floating air is sent into the exhaust circulation space on the side of the head pulley adjacent to the other partition plate forming the belt through the floating air supply port at the bottom of the trough located corresponding to the space. For this reason, the total amount of levitation air sent into the respective exhaust circulation spaces, that is, the total amount of exhaust discharged from the respective exhaust circulation spaces, is proportional to the length of the respective exhaust circulation spaces.

Thus, in the configuration in which the partition is formed by the partition plate in the carrier-side belt support trough, the exhaust of the section of the carrier-side belt support trough is exhausted into the return-side belt support trough. Therefore, the amount of exhaust discharged through the exhaust circulation space of the carrier-side belt-supporting trough through the openings at both ends of the trough is reduced by that amount and is reduced. Moreover, since the section is formed at a position closer to the tail pulley side, the exhaust circulation space of the carrier-side belt support trough located on the tail pulley side adjacent to the section has a short length, and the exhaust circulation space has The total amount of belt floating air supplied into the trough through the belt floating air supply port at the bottom of the trough located below the space is small, and the total amount of exhaust is also small.

For this reason, the conveying direction of the conveyed article is opposite to the flow direction of the exhaust, and the carrier-side belt-supporting trough in the carrier-side belt-supporting trough including the tail pulley-side end opening portion of the carrier-side belt-supporting trough at which the exhaust amount is the largest. The exhaust air volume in the exhaust circulation space near the tail pulley adjacent to the section is small. This reduces the apparent wind speed of the exhaust air in the exhaust circulation space near the tail pulley adjacent to the section in the carrier-side belt support trough, thereby reducing the floating, scattering, and soaring of the dust of the conveyed material, and discharging with the exhaust. The amount of dust generated is reduced.

Further, as a result of the exhaust of the section being exhausted to the return side trough, the amount of the floating air exhausted to the exhaust circulation space of the carrier side belt support trough located on the head pulley side adjacent to the section. Similarly, the amount of dust of the transported material due to the exhaust air is reduced, and the floating, scattering, and sowing of the dust are reduced. Also, the amount of exhaust flowing through the exhaust flow space in the compartment is naturally small because the entire exhaust flow space of the carrier-side belt support trough can be divided into at least three in the longitudinal direction. Floating, scattering and soaring of dust is reduced.

In this configuration, a partition is formed by the partition plate at a predetermined position in the exhaust circulation space of the carrier-side belt support trough, and the exhaust in the section is returned to the return side where there is no conveyed object and the conveyed object is not scattered. Missed in the belt support trough,
By using the trough as an exhaust duct, the amount of exhaust flowing through the exhaust circulation space of the section of the carrier-side belt support trough can be reduced and the wind speed can be reduced. In addition, the exhaust circulation space of the tail pulley side adjacent to the section can be reduced. And the wind speed can be reduced by reducing the amount of exhaust flowing through the exhaust circulation space on the head pulley side adjacent to the section, thereby reducing the amount of dust scattered due to exhaust discharged to the outside. And can be.

In the air-floating belt conveyor having the configuration (2), the exhaust circulation space of the carrier-side belt-supporting trough has at least one partition plate attached to both ends of the trough and at least one partition plate between the two ends, so that at least one in the longitudinal direction. Two compartments are formed. Further, the exhaust passage space of the return-side belt support trough is also formed with two partitions in the longitudinal direction by another partition plate. Each section of the carrier-side belt support trough and each section of the return-side belt support trough are connected by a connection duct, and exhaust gas discharged from each section of the carrier-side belt support trough is returned to each return. It is discharged to the section of the side belt support trough, and is discharged to the outside through exhaust pipes at both ends of the return side belt support trough together with the exhaust gas discharged from each section of the return side belt support trough.

Therefore, in this configuration, the section of the carrier-side belt support trough is formed by, for example, mounting a partition plate mounted between the partition plates at both ends of the support trough at an appropriate position between the partition plates at the both ends. By providing the exhaust inlet of the connection duct at an appropriate position in the section, for example, in the middle of the trough longitudinal direction, that is, at an appropriate position between the partition plates on both sides, the partition plate in each section is provided. The distance between the exhaust gas inlet and the exhaust inlet is short, and the amount of exhaust gas therebetween, that is, the wind speed of the exhaust gas can be reduced. This effectively prevents the dust of the transported object from scattering.

The section formed on the head pulley side of the carrier-side belt support trough is similarly connected at an appropriate position in the middle of the trough longitudinal direction, that is, at an appropriate position between the partition plates on both sides. By providing the exhaust inlet of the duct, the distance between the partition plate and the exhaust inlet becomes shorter in each section, the amount of exhaust between them,
That is, the wind speed of the exhaust gas can be reduced, and the scattering of the dust of the conveyed material can be effectively prevented.

In the air-floating type belt conveyor having the structure (3), the exhaust inlet of the connection duct is attached near the partition plate located on the side of the head pulley. The conflicting distance is shorter,
As a result, it is possible to suppress dust scattering of the conveyed object.

In the air-floating belt conveyor having the structure (4), at least two sections are formed in the exhaust-flow space of the carrier-side belt support trough and the return-side belt support trough by the partition plate, respectively. An exhaust port for exhaust air discharged from the compartment is attached to the compartment.

With this arrangement, the compartments of the carrier-side belt support trough and the return-side belt support trough can be appropriately mounted between the partition plates at both ends by, for example, partition plates attached between both end portions of the support trough. By forming and providing the exhaust port for exhausting to the outside at an appropriate position in the section, for example, in the middle of the trough longitudinal direction, that is, at an appropriate position between the partition plates on both sides,
In each section, the distance between the partition plate and the exhaust port is short, and the amount of exhaust between them, that is, the wind speed of exhaust, can be small. This effectively prevents the dust of the transported material from scattering in the carrier-side belt support trough.

With this configuration, for example, when the cross-sectional area of the exhaust circulation space is smaller in the return-side belt support trough than in the carrier-side belt support trough, the exhaust of the carrier-side belt support trough is passed through the return-side belt support trough to the outside. This is effective in cases such as when it cannot be discharged to

In the air-floating type belt conveyor having the structure (5), the exhaust port is attached to the carrier-side belt support trough so as to be close to the partition plate on the head pulley side which forms the section, so that the conveying direction of the conveyed object and the exhaust direction are adjusted. The distance in which the distribution directions of the objects are opposite to each other is shortened, and accordingly, it is possible to suppress the scattering of the dust of the conveyed object.

[0029]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an overall schematic front view of a first embodiment of an air-floating belt conveyor of the present invention, FIG. 2 is a cross-sectional view taken along line A of FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along line B of FIGS. 3 and 5, and FIG. 5 is a general schematic front view showing a third embodiment of an air-floating belt conveyor of the present invention. FIG. 6 is an overall schematic front view showing a fourth embodiment of the air levitated belt conveyor of the present invention, and FIG.
FIG. 7 is a sectional view taken along line C of FIG. 6.

First, a first embodiment of an air-floating belt conveyor according to the present invention will be described with reference to FIGS. In the air levitation type belt conveyor 1, a belt 10 is stretched endlessly between a head pulley 8 and a tail pulley 9, and a belt 10 in an intermediate portion between the head pulley 8 and the tail pulley 9 is formed by an upper carrier side belt 10a. A return-side belt support trough (hereinafter, simply referred to as a “carrier-side trough”) 2 having a circular cross-section and having a lower return-side belt 10b having the same cross-sectional shape and the same shape as the carrier-side trough ( Hereinafter, this is simply supported by a return trough) 3.

Carrier side trough 2 and return side trough 3
Are vertically connected by an air duct 6 for supplying air for lifting the belt into the carrier-side trough 2. Further, an air duct 7 for supplying air for lifting the belt into the return side trough 3 is provided outside the return side trough 3 outside. Both ends of the carrier-side trough 2 and the return-side trough 3 on the head pulley 8 side and the tail pulley 9 side are opened (opened).
A head side hood 4 is provided at the end on the side of the carrier trough 2 and the return side trough 3 so as to be internally connected to each other and connected to each other. At the end on the tail pulley 9 side, a tail side hood 5 is provided. And the return side trough 3 are provided so as to be connected to each other so as to communicate with each other.

The head side hood 4 is provided with a head pulley 8 contained therein, and is provided with a discharge port 4a for conveyed articles at a lower end portion thereof, and a floating portion connected to a head portion exhaust device 20 at an upper portion thereof. An air outlet 21 is provided.
The tail hood 5 has a tail pulley 9 inside.
And a skirt 5b provided on the upper surface of the carrier-side belt 10a in the vicinity of the tail pulley 9, and a lower part of a conveyed object supply chute 5a for supplying conveyed objects to the inside of the skirt 5b. In addition to the above, a levitation air exhaust port 31 connected to the tail exhaust device 30 is opened in the upper part.

Both ends of the air ducts 6 and 7 on the head pulley 8 side and the tail pulley 9 side are closed plates 6a and 7 respectively.
a. Further, both ends of the air ducts 6 and 7 are located at the same positions as both ends of the carrier side trough 2 and the return side trough 3. Then, both ends of the air-floating type belt conveyor 1 are supported frame 1A, respectively.
1B. Each of the air ducts 6 and 7 has a plurality of air supply ports 12 on its outer wall surface in the longitudinal direction thereof.
a is opened, and a discharge port of an air supply fan 11 for floating the belt is connected to each air supply port 12 a through an air supply pipe 12.

The trough 2 is provided at the bottom of the carrier side trough 2.
A large number of air supply ports 2a are formed at regular intervals along the longitudinal direction (the traveling direction of the carrier-side belt 10a).
The air sent by the fan 11 into the air duct 6 is evenly supplied to the respective air supply ports 2a and sent between the belt 10a inside the carrier side trough 2 and the inner surface of the trough 2. Also, a large number of air supply ports 3a are formed at equal intervals along the longitudinal direction of the trough 3 (running direction of the return side belt 10b) at the bottom of the return side trough 3, and a fan is provided in the air duct 7. The air fed by 11 is evenly supplied to the respective air supply ports 3 a and is sent between the belt 10 b inside the return side trough 3 and the inner surface of the trough 3.

As shown in FIG. 2, the carrier-side belt 10a and the return-side belt 10b have a substantially semicircular cross-section along the inner wall surface having a circular cross-section.
The conveyed object is the carrier side belt 10a of the carrier side trough 2.
Is placed on the upper part of the box and transported. Head side hood 4
A head unit exhaust device 20 including a pipe 22 connected to an exhaust port 21, a bag filter 23 as a dust collecting device and an exhaust fan 24 interposed in the pipe 22 is attached to the head. Section exhaust device 20 is a support frame 1A
Supported by On the other hand, the tail side hood 5 is provided with a pipe 32 connected to the exhaust port 31, a bag filter 33 as a dust collecting device interposed in the pipe 32, and a tail exhaust device 30 including an exhaust fan 34. The tail exhaust device 30 is supported by a support frame 1B.

In the inside of the carrier-side trough 2, the exhaust-flow space in the carrier-side trough 2 is formed in the longitudinal direction of the trough 2 by the two partition plates 40 in the exhaust-flow space located at a position closer to the tail pulley 9. Is provided with a section S formed by partitioning into sections. That is, the section S is formed by attaching one partition plate 40 forming the section S to the carrier-side trough 2.
A predetermined distance from the end opening on the side of the tail pulley 9 is mounted at a position closer to the tail pulley 9 side of the exhaust circulation space of the trough 2, and the other partition plate 40 is separated from the one partition plate 40 by a predetermined distance and the anti-tail pulley is separated. 9, that is, attached to the head pulley 8 side.

At a substantially intermediate position in the longitudinal direction of the section S, a connection duct 50 communicating with the exhaust flow space of the section S and opening the exhaust inlet 50a is mounted between the section S and the return side trough 3. The exhaust of the section S is exhausted to the exhaust circulation space of the return trough 3 through the connection duct 50, and the exhaust device 20 or 30 outside the belt conveyor 1 is exhausted together with the exhaust of the return trough 3 through the return trough 3. Exhaust.

Here, the exhaust circulation space is an upper space of a conveyed material placed on the carrier belt 10a and transported from the tail pulley side to the head pulley side in the carrier side trough 2, and in the return side trough 3. Is a space above the return side belt 10b.

As shown in FIG. 2, the partition plate 40 inside the carrier-side trough 2 forming the section S has an upper outer peripheral edge in the axial direction of the trough 2 and an inner wall surface having a circular cross section of the trough 2. The lower edge of the lower side has a shape substantially matching the shape of the upper edge of the mountain of the article placed on the carrier-side belt 10a, and its position does not hinder the transport of the article. As described above, the position is set as close as possible to the upper edge of the mountain shape.

In the air-floating conveyor 1 constructed as described above, the carrier-side trough 2 and the return-side trough 3 are provided at the bottoms of the carrier-side trough 2 and the return-side trough 3 at equal pitches in the longitudinal direction of the trough (belt running direction) over the entire length. The air supplied to the air ducts 6 and 7 is uniformly fed into the troughs 2 and 3 through the provided air supply ports 2a and 3a, respectively, and supplied between the inner wall surfaces of the troughs 2 and 3 and the lower surface of the belt. In the meantime, an air film is formed, and the levitation air passes between the inner wall surface of the trough and the lower surface of the belt, and is discharged (exhausted) upward from both ends in the width direction of the belt to the space of the trough. The belt 10 is evenly floated over the entire length. As a result, belt running can be smoothed.

The belt 10 runs endlessly between the head pulley 8 and the tail pulley 9 as the head pulley 8 is driven to rotate. At the intermediate portion between the head pulley 8 and the tail pulley 9, as shown in FIG. 10 is sent from the fan 11 to the inside of the air ducts 6 and 7 through the air supply pipe 12 by the carrier side trough 2 and the return side trough 3, and the air supply ports 2a below the troughs 2 and 3, respectively.
By being supported by an air film formed from the inside of the troughs 2 and 3 from the inner wall surfaces of the troughs and the lower surface of the belt, the semicircular inner periphery of the lower half of the troughs 2 and 3 is supported. A circular shape is supported along the wall surface.

In this state, the conveyed object is supplied onto the carrier side belt 10a while being guided by the skirt 5b through the supply chute 5a attached to the tail side hood 5, and a predetermined amount is provided on the belt 10a having a circular cross section. It is placed in a mountain shape and transported to the head pulley 8 side. When the head pulley 8 is reached, it is taken out of the conveyor through the outlet 4a.

During the transfer of such a conveyed product, the exhaust gas in the exhaust gas circulation space of the section S formed inside the carrier side trough 2 by the partition plates 40, 40 passes through the connection duct 50 and the exhaust gas circulation space of the return side trough 3. Missed by
As a result, the amount of exhaust gas discharged through the exhaust circulation space of the carrier-side trough 2 through the openings at both ends of the trough 2 is reduced by that amount, and is reduced. Moreover, since the section S is formed at a position closer to the tail pulley 9 side, the length of the exhaust circulation space a1 of the carrier-side trough 2 located on the tail pulley side adjacent to the section S is short, and The total amount of the belt floating air supplied into the trough 2 through the belt floating air supply port 2a at the bottom of the trough 2 located below the space in the circulation space a1 is assumed to be small, and the total amount of exhaust is also small. It is assumed to be small.

For this reason, the conveying direction of the conveyed articles is opposite to the flow direction of the exhaust gas, and the section S in the carrier-side trough 2 including the end opening on the tail pulley 9 side of the carrier-side trough 2 where the amount of exhaust is the largest. The exhaust air volume of the exhaust circulation space a1 near the tail pulley adjacent to the air outlet is small.
This reduces the apparent wind speed of the exhaust gas in the exhaust circulation space a1 near the tail pulley adjacent to the section S in the carrier side trough 2 so that the floating, scattering, and soaring of the dust of the transported material is reduced, and the exhaust accompanying the exhaust is performed. The amount of dust generated is reduced.

In the section S, the floating air supply port 2a at the bottom of the trough 2 located corresponding to the section S
The exhaust of the belt levitation air sent through the air flows through the exhaust circulation space of the section S, as indicated by a chain line arrow in FIG.
The air flows from both sides of the exhaust inlet 50a of the connection duct 50 toward the exhaust inlet 50a, flows into the exhaust inlet 50a, and is discharged through the connection duct 50 to the exhaust circulation space of the return trough 3. That is, the distance between the partition plate 40 on the tail pulley side constituting the section S and the exhaust inlet 50a of the connection duct 50, and the distance between the partition plate 40 on the head pulley side and the exhaust inlet 50a of the connection duct 50. The distance between them becomes shorter, the amount of exhaust between them becomes smaller, and the wind speed also becomes smaller. Therefore, the amount of dust of the conveyed material scattered and carried away with the exhaust is reduced.

The amount of exhaust gas flowing through the exhaust gas circulation space in the section S is originally such that the entire exhaust gas circulation space of the carrier-side trough 2 is divided into at least three exhaust gas circulation spaces S, a1, a2 in the longitudinal direction. Therefore, the size of the dust is small, and thus, the floating, scattering, and sowing of the dust of the conveyed material due to the exhaust wind are reduced.

Further, the exhaust of the section S is changed to the return side trough 3.
As a result, the amount of the floating air discharged to the exhaust flow space a2 of the carrier-side trough 2 located on the side of the head pulley 8 adjacent to the section S is similarly reduced to a small amount. The floating, scattering, and sowing of the dust of the conveyed material due to the above are reduced.

As described above, in the first embodiment, the partition plate 4 is located at a predetermined position in the exhaust circulation space of the carrier side trough 2.
The section S is formed by 0 and 40, and the exhaust of the section S is returned to the return trough 3 where there is no conveyed object and there is no scattering of the conveyed object.
By using the trough 3 as an exhaust duct, the amount of exhaust flowing through the exhaust circulation space of the section S of the carrier-side trough 2 can be reduced to reduce the wind speed, as well as the tail pulley adjacent to the section S. It is possible to reduce the wind speed by reducing the amount of exhaust flowing through the exhaust flow space a1 on the side and the exhaust flow space a2 on the head pulley side adjacent to the section S, thereby reducing the wind speed. The amount of dust that is scattered can be reduced.

Next, a second embodiment of the air-floating type belt conveyor according to the present invention will be described with reference to FIGS. 3 and 4, the same or corresponding parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.
In this embodiment, the air levitation type belt conveyor 1a includes:
In the carrier-side trough 2, partition plates 40 are attached to the end of the exhaust flow space in the trough 2 on the side of the head pulley 8 and the end of the tail pulley 9, respectively, and between the partition plates 40 on both ends. Is mounted at a position slightly approaching the tail pulley 9 side in the exhaust circulation space. Thereby, two sections, a section S1 on the tail pulley side and a section S2 on the head pulley side, are formed in the exhaust flow space in the carrier side trough 2 in the longitudinal direction.

In the exhaust flow space in the return side trough 3, another partition plate 41 is provided at a substantially central position in the longitudinal direction.
Is attached, and the section K on the tail pulley side in the longitudinal direction is attached.
1 and a section K2 on the side of the head pulley are formed. Further, between the section S1 of the exhaust flow space on the tail pulley side of the carrier side trough 2 and the section K1 of the exhaust flow space on the tail pulley side of the return trough 3, the exhaust flow space of the section S1 of the carrier side trough 2 is provided. A connection duct 50 for flowing the exhaust gas into the exhaust flow space of the section K1 of the return side trough 3 connects the exhaust inlet 50a to the section S1.
Are mounted in such a manner as to be positioned at the middle of the partition plates 40 on both sides of the partition.

The section S2 of the exhaust flow space on the head pulley side of the carrier side trough 2 and the return side trough 3
Between the sections K2 of the exhaust circulation space on the side of the head pulley,
A connection duct 50 that allows the exhaust gas in the exhaust gas circulation space of the section S2 of the carrier side trough 2 to flow into the exhaust gas circulation space of the section K2 of the return side trough 3 is mounted at a position where the exhaust gas inlet 50a is moved toward the head pulley 8 side. Have been.

On the other hand, a partition plate 4 is provided at an end of the return trough 3 on the head pulley side and an end of the return trough 3 on the tail pulley side.
The exhaust pipe 25 is connected to and attached to the closing plate 3a on the head pulley side, and the exhaust pipe 35 is attached to the closing plate 3a on the tail pulley side.
Are connected and mounted. The exhaust pipe 25 on the head pulley side is included in the head side hood 4, and the end of the pipe is located outside the hood 4 as an exhaust port 21a. A pipe 22a is connected to the exhaust port 21a.
, A bag filter 23a as a dust collector and an exhaust fan 24a are interposed and attached. The piping 2
2a, the bag filter 23a and the exhaust fan 24a form a head exhaust device 20a. The head exhaust device 20a is supported by a support frame 1A.

On the other hand, an exhaust pipe 35 on the tail pulley side is contained in the tail side hood 5, and the end of the pipe is located outside the hood 5 as an exhaust port 31a. The exhaust port 31a
Is connected to a pipe 32a, and a bag filter 33a as a dust collecting device and an exhaust fan 34a are connected to the pipe 32a.
Is interposed and installed. The pipe 32a, the bag filter 33a and the exhaust fan 34a constitute a tail exhaust device 30a. The tail exhaust device 30a is supported by a support frame 1B. Head side hood 4
The tail side hood 5 is provided with exhaust ports 4b and 5c for collecting atmospheric dust inside the hood. Other configurations are the same as those of the embodiment of the conveyor shown in FIGS.

In such an embodiment, in the section S1 of the carrier-side trough 2, the exhaust inlet 50 of the connection duct 50 is located at an intermediate position between the partition plates 40 on both sides of the section S1.
By providing a, the distance between each of the partition plates 40 on both sides and the exhaust inlet 50a at an intermediate position between them is short, and the amount of exhaust between them, that is, the wind speed of exhaust, can be made small. . This effectively prevents the dust of the transported object from scattering.

Similarly, the section S2 formed on the head pulley side of the carrier side trough 3 also has an exhaust inlet 50a between the partition plates 40 on both sides in the longitudinal direction of the trough 3 of the section S2.
, The distance between the partition plate 40 on both sides of the section S2 and the exhaust inlet 50a is short, and the amount of exhaust between them, that is, the wind speed of exhaust Can be made small, and scattering of dust of the conveyed object can be effectively prevented.

In this embodiment, the exhaust inlet 50a of the connection duct 50 in the section S2 is provided at a position close to the partition plate 40 located at the head pulley side.
The distance between the partition plate 40 located on the side of the head pulley and the exhaust inlet 50a is short, and the distance in which the conveying direction of the conveyed object and the flowing direction of the exhaust air are contradictory becomes short, thereby suppressing the scattering of dust of the conveyed object. be able to.

In this embodiment, in the exhaust circulation space of the carrier-side trough 2, a partition plate 40 to be mounted between the partition plates 40 at both ends of the trough 2 is mounted at a position closer to the tail pulley side, and the sections S1 and S2 In this case, the partition plate 40 attached between the partition plates 40 at both ends of the trough 2 is formed according to the length of the conveyor. May be provided at the center of the conveyor to form two sections of the same length, or a conveyor having a long length may be provided with two or more sections to form two or more sections.

Each section S1, S2 of the carrier side trough 2 is connected to the return side trough 3 via the respective connection duct 50.
Of the sections S1, S2 respectively flowing into the sections K1, K2 of
Is sent to the tail exhaust device 30a via the exhaust pipe 35 together with the exhaust gas from the sections K1 and K2 of the return side trough 3, and sent to the head exhaust device 20a via the exhaust pipe 25. Is recovered and released to the atmosphere. As described above, in the present embodiment, all of the exhaust gas from the carrier-side trough 2 flows into the exhaust gas circulation space of the return-side trough 3, and the return-side trough 3 becomes the carrier-side trough 2.
It is used as a duct for exhausting the exhaust air to the outside.

Next, a third embodiment of the air-floating belt conveyor of the present invention will be described with reference to FIG. 5 is the same as that of FIG.
The air-floating belt conveyor 1b of this embodiment is a modification of the embodiment of FIG. 3 and includes a partition plate 40 at both ends of the trough 2 in the exhaust circulation space of the carrier-side trough 2.
A plurality of sections (two in this case) are attached between the sections to form sections S1, S2, and S3 having substantially the same length in the longitudinal direction of the trough 2. In this embodiment, the connection duct 50 of each section S1, S2, S3 is attached to each section with the exhaust inlet 50a located at the center in the longitudinal direction, and the connection duct 50 of the center section S2 is The return trough 3 is attached to the center of the partition plate 41 at the center in the longitudinal direction with its exhaust outlet opened, and exhausts the compartment S2 of the carrier trough 2 to the compartments K1, K2 on both sides of the return trough 3. It can be distributed to both. The other configuration is the same as that of the second embodiment shown in FIG.

In such a configuration, the exhaust passage space of the carrier-side trough 2 is divided into three and divided into three sections S 1,
By forming S2 and S3, the amount of levitation air flowing into each section is further reduced as compared with the second embodiment, and hence the amount of discharge flowing through each section is also reduced. It is possible to further reduce dust prevention of the conveyed object.

Next, a fourth embodiment of the air-floating belt conveyor according to the present invention will be described with reference to FIGS. 6 and 7, the same or corresponding parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted.
In the air-floating belt conveyor 1c of the present embodiment, FIG.
As is clear from FIG. 5, the return side trough 3A is not formed with a circular cross section independently as in the above-described embodiment, but is formed by connecting an arc-shaped trough below the carrier side trough 2A having a circular cross section. It was done. The air duct 6a of the carrier-side trough 2A is located inside the return-side trough 3A, and the cross section of the exhaust circulation space is formed such that the return-side trough 3A is smaller than the carrier-side trough 2A.

In the exhaust flow space in the carrier side trough 2A, two partitions S1 and S2 are formed by mounting a partition plate 40a at an intermediate position between both end portions and the partition plate at both end portions, and the return side trough is formed. A partition plate 41a is mounted in the exhaust flow space in the inside 3A at both ends thereof and at an intermediate position between the partition plates at both ends and two partitions K1 and K2 are formed.
Exhaust ports 71 and 61 opened at the upper part of the trough 2A are provided in the sections S1 and S2 of the carrier-side trough 2A, respectively.
Are mounted close to the partition plate 40a located on the head pulley 8 side, and the sections K1 and K2 of the return side trough 3A are mounted.
Has an exhaust port 72 opened on the side of the trough 3A,
62 are attached.

An exhaust pipe 73 is connected to the exhaust port 71 of the section S 1, and an exhaust pipe 74 is connected to the exhaust port 72 of the section K 1. The exhaust pipes 73 and 74 are assembled into an exhaust pipe 75. And the exhaust pipe 75 has a bag filter 7.
6. An exhaust fan 77 is provided. The exhaust pipe 73,
74, 75, the bag filter 76 and the exhaust fan 77 constitute a second exhaust device 70. An exhaust pipe 63 is connected to the exhaust port 61 of the section S2, and the section K
An exhaust pipe 64 is connected to the exhaust port 62 of the
3 and 64 are assembled and connected to an exhaust pipe 65, and a bag filter 66 and an exhaust fan 67 are interposed in the exhaust pipe 65. The exhaust pipes 63, 64, 65, the bag filter 66 and the exhaust fan 67 constitute a first exhaust device 60. Other configurations are the same as those of the above embodiment.

In the configuration of such an embodiment, even when the cross-sectional area of the exhaust flow space of the return side trough 3A is small and the flow velocity cannot be maintained at a predetermined small design flow velocity value, each of the exhaust ports 72 of the sections K1 and K2, By providing the section 62 substantially at the middle position in the longitudinal direction of each section, the amount of exhaust flowing toward the exhaust ports 72 and 62 in each section can be reduced, and therefore, the wind speed can be maintained at a predetermined small value. As a result, an increase in pressure loss can be prevented. Further, this embodiment can be applied to a case where the exhaust from the carrier side trough cannot be exhausted using the return side trough as in the first, second and third embodiments.

Then, similarly to the above-described embodiment, in the carrier-side trough 2A, the exhaust ports 71, 61 in each of the sections S1, S2 are respectively placed at appropriate positions in the longitudinal direction of the trough 2A in each of the sections, that is, Partition plates 40 on both sides of each section
By providing them at appropriate positions between “a” and “a”, the distance between the partition plate 40a and the exhaust ports 71 and 61 in each section becomes short, and the amount of exhaust between them, that is, the wind speed of exhaust, can be made small. Thus, it is possible to effectively prevent the dust of the transported object from scattering in the carrier-side trough 2A.

In this embodiment, the exhaust ports 71 and 61 of the sections S1 and S2 of the carrier side trough 2A are respectively connected to the sections S1 and S2.
1. Since the partitioning plate 40a on the both sides in the longitudinal direction forming S2 is mounted close to the partitioning plate 40a located near the head pulley 8, a section in which the conveying direction of the conveyed product is opposite to the flow direction of the exhaust gas ( Distance) is short, and the scattering of the dust of the conveyed material can be reduced accordingly. The exhaust port 7
Needless to say, 1, 61 may be located at the center in the longitudinal direction of each section S1, S2.

[0067]

As apparent from the above description, the present invention has the following excellent effects. In the configuration of the first aspect, the section of the exhaust circulation space of the carrier side trough is formed, for example, at a position close to the tail pulley side, so that the transport direction of the conveyed article and the exhaust circulation direction are opposite to each other, and the exhaust amount is reduced. It is possible to reduce the amount of exhaust air in the exhaust circulation space near the tail pulley adjacent to the section in the carrier trough including the end opening portion on the tail pulley side of the carrier trough, which is the largest, so that the carrier trough can be reduced. To reduce the apparent wind speed of the exhaust gas in the exhaust circulation space near the tail pulley adjacent to the section, to reduce the floating, scattering and soaring of the dust of the conveyed product, and to reduce the amount of dust discharged along with the exhaust. Can be.

Further, as a result of the exhaust of the section being discharged to the return side trough, the amount of the floating air exhausted to the exhaust circulation space of the carrier side trough located on the head pulley side adjacent to the section is also reduced. Similarly, the amount can be small, and the floating, scattering, and soaring of dust of the conveyed material due to the exhaust air can be reduced. Also, the amount of exhaust flowing through the exhaust circulation space in the compartment can be naturally reduced as a result of the entire exhaust circulation space of the carrier-side trough being divided into at least three in the longitudinal direction, and the amount of conveyed material due to the exhaust wind can be reduced. Dust floating, scattering and soaring can be reduced.

As described above, the partition is formed by the partition plate at the predetermined position of the exhaust circulation space of the carrier-side belt support trough, and the exhaust of the partition is transferred to the return-side belt support trough where there is no conveyed object and the conveyed object is not scattered. By using the trough as an exhaust duct, the amount of exhaust flowing in the exhaust circulation space of the section of the carrier-side belt support trough can be reduced to reduce the wind speed, and also the exhaust on the tail pulley side adjacent to the section can be reduced. The flow rate is reduced by reducing the amount of exhaust flowing through the circulation space and the exhaust circulation space on the head pulley side adjacent to the section, so that the amount of dust scattered due to exhaust discharged to the outside is reduced. Can be original.

According to the second aspect of the present invention, the return-side trough having no conveyed material is used as a duct for exhausting the entire amount of exhaust air from the carrier-side trough, and the section of the carrier-side trough is formed, for example, at both ends of the support trough. A partition plate attached between the partition plates is mounted and formed at an appropriate position between the partition plates at both ends, and is provided at an appropriate position in the section, for example, in the middle of the trough longitudinal direction, that is, at an appropriate position between the partition plates on both sides. By providing the exhaust inlet of the connection duct at a suitable position, the distance between the partition plate and the exhaust inlet can be reduced in each section, and the amount of exhaust between them, that is, the exhaust The wind speed can be reduced. As a result, it is possible to effectively prevent the dust of the transported object from scattering.

Similarly, in the section formed on the head pulley side of the carrier side trough, for example, at an appropriate position in the middle of the trough longitudinal direction, that is, at an appropriate position between the partition plates on both sides, the connection duct is provided. By providing the exhaust gas inlet, the distance between the partition plate and the exhaust gas inlet becomes shorter in each section, and the amount of exhaust gas therebetween, that is, the wind speed of the exhaust gas can be made smaller. It is possible to effectively prevent scattering of dust of the object.

According to the third aspect of the present invention, since the exhaust inlet of the connection duct is attached near the partition plate located on the side of the head pulley, the distance between the transport direction of the conveyed product and the exhaust flow direction is shortened, As a result, it is possible to suppress dust scattering of the conveyed object.

According to the structure of claim 4, for example, the cross-sectional area of the exhaust passage space of the return side trough is smaller than that of the carrier side trough, so that the return side trough cannot be used as an exhaust duct for exhaust of the carrier side trough. Even when the cross-sectional area of the exhaust flow space of the return side trough is small and the flow velocity cannot be maintained at a predetermined small design flow velocity value,
By providing each exhaust port of each section of the return trough at a substantially middle position in the longitudinal direction of each section, the amount of exhaust flowing toward each exhaust port in each section can be reduced, Therefore, the wind speed can be maintained at a predetermined small value, and as a result, an increase in pressure loss can be prevented.

In the carrier-side trough, the exhaust port in each section is provided at an appropriate position in the longitudinal direction of the trough of each section, that is, at an appropriate position between the partition plates on both sides of each section. In each section, the distance between the partition plate and the exhaust port is short, and the amount of exhaust between them, that is, the wind speed of exhaust, can be small. As a result, it is possible to effectively prevent the dust from being conveyed in the carrier side trough.

According to the fifth aspect of the present invention, since the exhaust port is attached to the carrier-side trough so as to be close to the partition plate on the head pulley side which forms the partition, the distance in which the transport direction of the conveyed article and the exhaust direction are opposite is short. Therefore, it is possible to suppress the dust scattering of the conveyed material.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view showing a first embodiment of an air-floating belt conveyor of the present invention.

FIG. 2 is a cross-sectional view taken along line A of FIG.

FIG. 3 is an overall schematic front view showing a second embodiment of the air-floating belt conveyor of the present invention.

FIG. 4 is a sectional view taken along line B of FIGS. 3 and 5;

FIG. 5 is an overall schematic front view showing a third embodiment of the air-floating belt conveyor of the present invention.

FIG. 6 is an overall schematic front view showing a fourth embodiment of the air-floating belt conveyor of the present invention.

FIG. 7 is a sectional view taken along line C of FIG. 6;

[Explanation of symbols]

1, 1a, 1b, 1c Air-floating belt conveyor 2, 2A Carrier-side belt support trough (carrier-side trough) 2a Air supply port (for carrier-side trough) 3 Return-side belt support trough (return-side trough) 3a Air supply port (For return trough) 6, 6a Air duct (carrier trough side) 7, 7a Air duct (return trough side) 8 Head pulley 9 Tail pulley 10 Belt 10a Carrier side belt 10b Return side belt 11 Air supply fan for floating 20, 20a Exhaust device 21, 21a Exhaust port 22, 22a Exhaust pipe 23, 23a Bag filter (dust collector) 24, 24a Exhaust fan 30, 30a Tail exhaust device 31, 31a Exhaust port 32, 32a Exhaust pipe 33, 33a Bag Filter (dust collector) 34, 34 Exhaust fan 40, 40a, 41, 41a Partition plate 50 Connection duct 50a Exhaust inlet S, S1, S2, S3 section (carrier side trough) K1, K2 section (return side trough) 60 First exhaust device 61 Exhaust port ( Carrier-side trough) 62 Exhaust port (return-side trough) 63, 64, 65 Exhaust pipe 66 Bag filter 67 Exhaust fan 70 Second exhaust device 71 Exhaust port (carrier-side trough) 72 Exhaust port (return-side trough) 73, 74 , 75 Exhaust pipe 76 Bag filter 77 Exhaust fan

Claims (5)

[Claims] 1. A belt running between a head pulley and a tail pulley is caused to float by a pressure of air supplied into the troughs in a carrier-side belt support trough and a return-side belt support trough. In the air-floating belt conveyor in which the carrier is conveyed by the carrier-side belt and the air for floating the belt supplied to the respective troughs is exhausted to the outside, the inside of the carrier-side belt support trough is used. The partition wall is formed by partitioning the exhaust flow space in the carrier-side belt support trough in the longitudinal direction of the trough with a partition plate, and the partition of the exhaust flow space of the carrier-side belt support trough and the return-side belt support trough. A connection duct is provided between the exhaust passage and the exhaust passage to allow the exhaust in the section to flow into the exhaust passage in the return belt support trough. Only, an air floating belt conveyor is characterized in that so as to exhaust to the outside the exhaust gas that is exhausted from the compartment of the carrier side belt supporting the trough through the return-side belt supporting trough. 2. The partition plate is attached to an end on the head pulley side and an end on the tail pulley side of an exhaust flow space in the carrier side belt support trough, and at least one partition is provided in the exhaust flow space between the end plates. By separately mounting, at least two compartments are formed in the exhaust flow space in the carrier-side belt support trough in the longitudinal direction, and another partition plate is mounted in the exhaust flow space in the return-side belt support trough to extend in the longitudinal direction. Two compartments are formed, each compartment of the carrier side belt bearing trough exhaust space and each compartment of the return belt support trough exhaust space between each compartment of the carrier side belt support trough. Connecting ducts for separately flowing exhaust gas into the respective sections of the return-side belt support trough are attached, and the heads of the return-side belt support troughs are attached. Pulley side end and Terupuri side air floating belt conveyor according to claim 1, characterized in that mounted by connecting the respective exhaust pipes for exhausting the floating air to the outside end of the. 3. An exhaust inflow port of said connecting duct attached to said section of said carrier-side belt bearing trough, wherein said exhaust inlet of said connecting duct is formed of said partition plate on both longitudinal sides of said trough forming said section of said carrier-side belt bearing trough. 3. The air-floating belt conveyor according to claim 1, wherein the belt conveyor is mounted at a position close to a partition plate located near the head pulley. 4. A belt running between a head pulley and a tail pulley is floated in a carrier side belt support trough and a return side belt support trough by the pressure of air supplied to the troughs. In the air-floating belt conveyor in which the carrier is conveyed by the carrier-side belt and the air for floating the belt supplied to the respective troughs is exhausted to the outside, the inside of the carrier-side belt support trough is used. A partition plate for partitioning the exhaust circulation space in the belt support trough in the longitudinal direction of the trough is provided in the return-side belt support trough and a head pulley-side end and a tail pulley-side end in the carrier-side belt support trough, respectively. By attaching at least one of the belt supports to the belt support portion and at least one of the partition plates at both ends, At least two sections are formed in the exhaust flow space in the rough in the longitudinal direction, and an exhaust port for exhausting the air for floating to the outside is attached to each section of the two belt supporting troughs. Air levitated belt conveyor. 5. An exhaust port attached to each section of the carrier-side belt-supporting trough is located at a position near a partition plate located closer to a head pulley among partition plates on both longitudinal sides of a trough forming the section. 5. The air levitation belt conveyor according to claim 4, wherein the belt conveyor is mounted.