JPH1159840A - Pneumatic floating type belt conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the supply air quantity by jetting air in an air duct from a through hole to the return path lower surface side of a transport belt in a lower trough member, and jetting air supplied to an air chamber from the lower trough through hole to the transport belt outgoing side lower surface from a through hole in an upper trough member. SOLUTION: Air is supplied into an air chamber 18 formed by a tubular member 20 forming an air duct, upper and lower trough members 14, 15, side plates 16, 16 and a partition material by an air intake blower 23. The air supplied into the air duct 20a is jetted from a through hole 22 toward the return path side lower surface of a transport belt 11 to form an air layer, which is forced to flow in an air chamber from both sides while floating and holding the return path side of the transport belt 11. The air supplied into the air chamber 18 from an air supply path 25 is jetted with the air which flows in from the through hole 22 toward the outgoing path side lower surface of the transport belt 11 from a through hole 19 to form an air layer, which is forced to flow in a carrying space 27 from both sides while floating and holding the outgoing path side of the transport belt 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air levitated belt conveyor having a transport belt driven while being levitated and held by an air layer.

[0002]

2. Description of the Related Art In recent years, as a transport mechanism for ore and coal,
2. Description of the Related Art There has been proposed an air-floating type belt conveyor which floats and holds a conveying belt by an air layer. As shown in FIG. 4, the air levitation type belt conveyor is configured such that trough members 2 and 3 that define the shape of the forward side of the conveyor belt 1 in a valley shape and the shape of the return side in a mountain shape (or valley shape) are left and right. A trough frame 5 fixed to side plates 4 and 4 arranged on both sides is provided. An air duct 6 is provided along the length direction of the trough frame on the lower center side of the trough members 2 and 3. A plurality of through holes 7 are opened in the members 2 and 3 along the air duct 6. Then, from the air supply blower 8 to the air duct 6
Of the transport belt 1 and the trough members 2, 3
3 to form an air layer so that the transport belt 1 floats.

[0003] The air-floating belt conveyor has a structure as described above, which greatly reduces the resistance acting on the conveyor as compared with a conventional roller-supported belt conveyor, and eliminates noise and vibration caused by rotation of the rollers. Can be.

In the conventional air-floating belt conveyor, the air duct 6 has a small cross-sectional area, and the upper and lower trough members 2 and 3 are provided with the air ducts 6, respectively. Is very large. Therefore, the transport belt 1
At present, in addition to the amount of air required to keep the air floating, the amount of air sufficient to compensate for the pressure loss is supplied to the air duct 6.

[0005]

In the above-mentioned air-floating belt conveyor, an air blower having a high processing capacity must be employed to supply an enormous amount of air to the air duct. However, there has been a problem that the equipment cost and the operating cost of the belt conveyor, including the above, have risen.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and reduces the pressure loss in an air duct to reduce the size of an air supply blower. As a result, the equipment cost and operation of an air-floating belt conveyor are reduced. It aims to reduce costs.

[0007]

As means for solving the above-mentioned problems, an air-floating belt conveyor having the following configuration is employed. That is, on both sides of the upper trough member along the outward lower surface of the transport belt, and the lower trough member disposed below the upper trough member and along the backward lower surface of the transport belt, the upper and lower trough members are provided between the side portions of both the trough members. In addition to fixing the side plate, by providing partition members fixed to the upper trough member and the side plates on both sides and in contact with the upper surface on the return path side of the conveying belt at both ends of the upper trough member and the lower trough member, air is generated in the driving direction of the conveying belt. A trough frame having a chamber is formed. The lower trough member is provided with an air duct on the lower surface thereof along the driving direction of the transport belt, and the air supplied to the air duct is jetted to the lower surface on the return path side of the transport belt to form an air layer. A through hole is formed, and in the upper trough member, air supplied to the air chamber from the lower trough through hole is blown to the lower surface on the outward side of the conveyor belt to form an upper trough through hole.

An air supply means for supplying air to the air chamber is provided separately from the lower trough through hole.

A lower trough member is provided along the driving direction of the conveyor belt, and has a circular tubular section forming an air duct, and a tubular member having an upper curved surface exposed to an air chamber on both sides of the upper curved surface. And a plate-shaped member provided so as to be continuous.

A soft sealing member is provided at a position of the partition member in contact with the conveyor belt to prevent air from leaking from the air chamber.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an air-floating belt conveyor according to the present invention will be described with reference to FIGS. The air-floating belt conveyor has a trough frame 10
A drive pulley 12 and a driven pulley 13 for driving the transport belt 11 are disposed at both ends of the pulley 12, and both pulleys 12,
The transport belt 11 is wound and supported between the belts 13. The drive pulley 12 is driven to rotate by a motor (not shown), and the transport belt 11 is driven to rotate by rotation of the drive pulley 12.

The trough frame 10 is disposed parallel to and below the upper trough member 14 for defining the valley shape of the conveyor belt along the lower surface of the conveyor belt 11 on the outward path side. A state in which the lower trough member 15 that defines the chevron shape of the conveyor belt 11 along the return path side lower surface, and the upper and lower trough members 14 and 15 are installed on both sides of the trough members 14 and 15 between the side portions thereof. Side members 16 and 16 fixed at both ends, and partition members 17 fixed at both ends of both trough members 14 and 15 to the upper trough member 14 and the side plates 16 on both sides and provided in contact with the upper surface of the conveyance belt 11 on the return path side. It is provided with.

The members are not only welded without any gap, but also are welded by caulking, and a sponge sealing member 17 is provided on the lower edge of the partition member 17.
a is provided in contact with the upper surface of the conveying belt 11 on the return path side, whereby a highly airtight air chamber 18 is formed inside the trough frame 10 along the driving direction of the conveying belt 11.

At the center of the upper trough member 14 in the width direction, a plurality of through holes (upper trough through holes) 19 are formed at predetermined intervals along the length direction of the upper trough member 14.

The lower trough member 15 includes a tubular member 20 having a circular cross section provided along the driving direction of the conveyor belt 11;
A plate-like member 21 provided on both sides of the upper curved surface with the upper curved surface of the tubular member 20 exposed in the air chamber 18.

A plurality of through holes (lower trough through holes) 2 are provided on the side wall of the tubular member 20 exposed in the air chamber 18 at predetermined intervals along the longitudinal direction of the lower trough member 15.
2 are formed. The tubular member 20 is an air duct 20a.
And is connected to the air supply blower 23 to receive supply of air.

An air chamber 18 is provided on one side plate 16.
Air supply means 24 for supplying air into the through hole 2
An air supply path 25 different from the air supply path 2 is provided.
5 is also connected to the air supply blower 23.

The transport belt 11 is an endless belt having a predetermined width. As described above, the drive pulley 1 is driven by using the upper surface of the upper trough member 14 and the upper surface of the lower trough member 15 as drive paths.
It is wound between the driven pulley 2 and the driven pulley 13, and is defined on the upper trough member 14 in a valley shape open upward, and on the lower trough member 15 is defined in a mountain shape open downward. .

A cover 26 is provided between the side plates 16 and 16 to cover the upper surface of the transport belt 11 on the outward path, thereby forming a transport space 27 isolated from the outside on the upper trough member 14. The transported object H placed on the transport space 27 moves in the transport space 27.

The transport space 27 has a supply chute 2 on the upstream side.
The discharge space 31 communicates with the loading space 29 formed by the discharge chute 30, and the downstream side communicates with the discharge space 31 formed by the discharge chute 30.

An exhaust blower 32 for discharging air from the transfer space 27 is connected to the discharge space 31 via a bag filter 33, and an intake side of the air supply blower 23 is connected to the discharge space 31 and passes through the bag filter 33. A part of the generated air is circulated and supplied again to the air chamber 18 and the air duct 20a.

In the air-floating belt conveyor configured as described above, the transport belt 11 is driven to rotate by the rotation of the driving pulley 12, and the forward path side of the transport belt 11 is moved from the driven pulley 13 side along the upper trough member 14. While moving to the driving pulley 12 side, the return path side of the transport belt 11 moves from the driving pulley 12 side to the driven pulley 13 side along the lower trough member 15. At the same time, air is supplied into the tubular member 20 forming the air duct and the air chamber 18 by the air supply blower 23.

The air supplied into the air duct 20a is
The air is ejected from the through holes 22 toward the lower surface on the return path side of the transport belt 11 to form an air layer, and flows into the air chamber 18 from both sides while floating and holding the return path side of the transport belt 11.

The air supplied from the air supply passage 25 into the air chamber 18 is ejected from the through hole 19 toward the lower surface on the outward side of the conveyor belt 11 together with the air flowing through the through hole 22 to form an air layer. Then, it flows into the transport space 27 from both sides while floating and holding the forward path side of the transport belt 11.

As a result, the conveyor belt 11 is brought into a non-contact state with the upper trough member 14 and the lower trough member 15, and is driven smoothly without generating noise or vibration. The air flowing into the transfer space 27 is sucked by the exhaust blower 32 and flows into the discharge space 31, and a part of the air flows into the air supply blower 23.
Is circulated and supplied to the transport space 27, and the remainder is discharged from the exhaust blower 32 to the atmosphere.

The conveyed object H is placed on the forward path side of the conveyor belt 11 from the supply chute 28 and is conveyed to the discharge chute 30. Here, dust generated from the transported material H in the transporting process is sucked by the exhaust blower 32 together with the air flowing into the transporting space 27 and collected by the bag filter 33.

According to the air-floating belt conveyor configured as described above, the trough frame 10 itself forms the air chamber 18 having a large cross-sectional area, so that the pressure loss in the trough frame 10 is reduced. Therefore, the amount of air to be supplied to the air chamber 18 is reduced as compared with the conventional case, so that the size of the air supply blower 23 can be reduced, and the equipment cost and operation cost of the air-floating belt conveyor can be reduced.

Further, unlike the conventional air levitation type belt conveyor, there is no need to provide an air duct on the lower surface of the upper trough member 14, so that the trough frame 10 can be reduced in weight and size, and the weight of the trough frame 10 can be reduced. It is possible to prevent an increase and a decrease in rigidity accompanying the increase.

By providing air supply means 24 for supplying air into the air chamber 18 separately from the air supply from the lower trough member 15 side, the amount of air jetted to the lower surface on the outward path side of the conveyor belt 11 is increased. Thus, even when the transported material H is placed on the transport belt 11, the transport belt 11 can be floated and the non-contact state with the upper trough member 14 can be maintained.

By forming the lower trough member 15 from the tubular member 20 and the plate-like member 21, the rigidity of the trough frame 10 can be increased by operating the tubular member 20 as a beam.

Further, since the lower trough member 15 can be constructed by combining a ready-made tubular material and a plate material,
The processing cost of the lower trough member 15 is reduced as compared with the case where bending is required as in the related art, and the trough frame 10 is reduced.
Can be manufactured at low cost.

By providing the sealing member 17a on the partition member 17, it is possible to prevent the air from leaking from the air chamber 18 and prevent the operation efficiency of the air supply blower 23 from lowering.

In this embodiment, the air supply means 24 is provided separately from the air supply from the lower trough member 15 side, but the air chamber 18 is provided from the lower trough member 15 side.
If it is possible to float and hold the forward side of the conveyor belt 11 only with the air flowing into the
4 may not be provided.

Although the lower trough member 15 is constituted by the tubular member 20 and the plate-like member 21, a lower trough member similar to the conventional one may be employed and a duct member may be fixed to the lower surface thereof.

[0035]

As described above, according to the air-floating belt conveyor according to the present invention, the trough frame itself forms an air chamber having a large cross-sectional area, thereby reducing pressure loss in the trough frame. . Therefore, since the amount of air to be supplied to the air chamber is reduced as compared with the conventional case, the size of the air supply blower can be reduced, and the equipment cost and operation cost of the air-floating belt conveyor can be reduced. Furthermore, unlike the conventional air-floating belt conveyor, there is no need to provide an air duct on the lower surface of the upper trough member, so that the trough frame can be reduced in weight and size, and the trough frame increases in weight and the rigidity associated therewith. The drop can be prevented.

An air supply means for supplying air into the air chamber is provided separately from the lower trough through-hole, and the amount of air jetted to the lower surface on the outward path side of the conveyor belt is increased so that the object to be transported is placed. Even in this case, the non-contact state with the upper trough member can be maintained by floating the conveyor belt.

The lower trough member is provided with a tubular member having a circular cross section which is provided along the driving direction of the conveyor belt and forms an air duct, and on both sides of the upper curved surface with the upper curved surface of the tubular member exposed to the air chamber. With the configuration including the plate-shaped member provided so as to be continuous, the rigidity of the trough frame can be increased by making the tubular member act as a beam. Furthermore, it is also possible to configure a lower trough member by combining a ready-made tubular member and a plate-like member, and to lower the processing cost of the lower trough member as compared with the case where bending processing is required as in the conventional case. Thus, the manufacturing cost of the trough frame can be reduced.

By providing a soft seal member at a position where the partition member is in contact with the transport belt, it is possible to prevent air from leaking from the air chamber and to prevent a reduction in the operation efficiency of the air supply blower.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of an embodiment of an air-floating belt conveyor according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective sectional view showing an example of a conventional air levitation type belt conveyor.

[Explanation of symbols]

 Reference Signs List 10 trough frame 11 transport belt 14 upper trough member 15 lower trough member 16 side plate 17 partition member 17a seal member 18 air chamber 19 through hole (upper trough through hole) 20 tubular member 20a air duct 21 plate member 22 through hole (lower trough) Through-hole) 23 Air supply blower 24 Air supply means H Conveyance

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yukihiko Ezaki 1-19-10 Mohri, Koto-ku, Tokyo Ishikawajima-Harima Heavy Industries, Ltd. Koto Office

Claims (4)

[Claims] 1. An upper trough member along a forward lower surface of a transport belt, and a lower trough member disposed below the upper trough member and along a return lower surface of the transport belt. In an air-floating belt conveyor that drives the transport belt in a state where the transport belt is floated and held by forming an air layer on the upper surface of the trough member, a side portion of both trough members is provided on both sides of an upper trough member and a lower trough member. Along with the side plate laid between them being fixed, at both ends of the upper trough member and the lower trough member, a partition member fixed to the upper trough member and the side plates on both sides and in contact with the upper surface on the return path side of the conveyor belt is provided, A trough frame in which an air chamber is formed in the driving direction of the conveyor belt is configured. The lower trough member has air on its lower surface along the driving direction of the conveyor belt. And a lower trough through-hole for forming an air layer by ejecting air supplied to the air duct to the lower surface on the return path side of the conveyor belt, is formed in the upper trough member from the lower trough through-hole. An air-floating belt conveyor, wherein an upper trough through-hole for forming an air layer by ejecting air supplied to a chamber to a lower surface on a forward path side of a conveyor belt is formed. 2. An air-floating belt conveyor according to claim 1, further comprising air supply means for supplying air into said air chamber, separately from said lower trough through-hole. 3. A state in which the lower trough member is provided along the driving direction of the conveyor belt and has a circular cross-section forming the air duct, and an upper curved surface of the tubular member is exposed to the air chamber. 3. An air-floating belt conveyor according to claim 1, further comprising a plate-shaped member provided so as to be continuous on both sides of said upper curved surface. 4. The partition member is provided with a soft seal member at a position in contact with an upper surface on a return path side of the transport belt to prevent air from leaking from the air chamber. An air-floating belt conveyor according to 1, 2, or 3.