JP2000272730A - Air floating belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smaller and lighter air floating belt conveyor in general use applicable to a total length, if different, through the adjustment of the connection number. SOLUTION: An air floating belt conveyor runs with belts 1 in a floating condition while supplying air between each of troughs 2, 2a and each of the belts 1. The troughs 2, 2a are formed by longitudinally arranging at least two trough units 3 having unit troughs 4, 5 formed at preset lengths and blowers (air supply means) 8, 9 for supplying air between the belts 1 for the unit troughs 4, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor for transporting a lump, granular, or powdery load of ore, coal, grain, etc., in which the belt is floated by an air layer. The present invention relates to a belt conveyor.

[0002]

2. Description of the Related Art In general, a belt conveyor is used to convey a lump, granular, or powdery load of ore, coal, grain, or the like. An example of such a conveyor is shown in FIG. The belt conveyor shown in FIG. 5 includes a carrier-side trough 102 and a return-side trough 103 having an arc-shaped cross section, and a belt 101 on which a load is placed is disposed on the upper surface thereof.
To supply air between the belt 101 and the belt 101
An air levitation system is used in which the vehicle travels while levitating.

[0003] The belt conveyor has ducts 105, 105 on the lower surface of troughs 102, 103 for guiding a belt 101.
Each of the troughs 102 and 103 is provided with a number of air holes 104 at the center in the width direction along the longitudinal direction. Then, air is blown upward from each air hole 104 by sending air from the blower 107 into each duct 105, 106 to form an air layer between the belt 101 and each trough 102, 103. , 103 are lifted.

[0004] By adopting such a configuration, the air levitation type belt conveyor can greatly reduce the resistance acting on the belt as compared with the conventional roller type belt conveyor, and can reduce the burden of driving the belt. Further, noise and vibration can be reduced.

[0005]

By the way, this type of belt conveyor is appropriately formed to have a total length required in various facilities, and has a total length of 10 m to 100 m or even more than 1 km. In other words, since the belt conveyors are designed one by one as needed as to their overall length, each conveyor itself becomes large and heavy, and it is difficult to use the same full length in other places. It was missing. In particular, the above-mentioned air-floating type belt conveyor includes a blower 107 for supplying air for floating the belt 101.
It is necessary to consider the performance and the number of installations of the conveyor 7 each time the conveyor has a different overall length in the design stage.

In the air-floating belt conveyor, ducts 105 and 106 on the lower surfaces of the troughs 102 and 103 are in communication with each other over the entire length of the conveyor. Therefore, when a part of the duct is cracked and air leaks from the part, the pressure of the entire trough is reduced, and air necessary for floating the belt 101 is not supplied to the upper surfaces of the troughs 102 and 103. The traveling of the belt 101 may be hindered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and realizes miniaturization and weight reduction, and has a versatile air-floating belt conveyor capable of coping with the number of connected units even when the total length is different. The purpose is to provide.

[0008]

In order to achieve the above object, the invention according to claim 1 provides an air-floating type in which air is supplied between a trough and a belt, and the belt travels with the belt floated. A belt conveyor, in which at least two or more trough units each having a unit trough formed to a predetermined length and air supply means for supplying air between the unit trough and the belt are arranged in a longitudinal direction. A technique for forming a trough is adopted. In this air-floating belt conveyor, a standardized trough unit is formed, and a plurality of the trough units are connected to form a trough necessary for the entire length of the conveyor. And versatility is ensured. In addition, since it is sufficient to have the minimum structure necessary for forming the trough unit, unnecessary members can be eliminated, and the overall size and weight of the conveyor can be easily reduced. Becomes

According to a second aspect of the present invention, in the air-floating belt conveyor according to the first aspect, a technology is applied in which the trough unit has both a carrier side and a return side as a unit trough. In this air levitation type belt conveyor, since both the carrier side and the return side are provided as unit troughs of the trough unit, this trough unit can be applied when the air levitation method of the belt is adopted on both the carrier side and the return side. Becomes

[0010] The invention according to claim 3 is the invention according to claim 1 or 2.
In the air levitation type belt conveyor, a technique is applied in which the air supply means sets the amount of air supply per unit time according to the respective arrangement positions of the trough units. In this air levitation type belt conveyor, for example, a trough unit disposed on a portion where a belt is bent such as a portion forming a horse back or a catenary on the conveyor so as to appropriately float the belt. The air supply amount per unit time by the air supply means can be appropriately set.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This air levitated belt conveyor is
It is installed to convey a lump, granular, or powdery load such as ore, coal, and grain. A belt 1 on which the load is loaded is wound around two pulleys P (see FIG. 2), and is illustrated. It is configured so as to rotate around by a drive mechanism that does not. FIG. 1 is a perspective view showing an embodiment of an air levitation type belt conveyor according to the present invention, FIG. 2 is a side view showing an entire air levitation type belt conveyor using a trough unit, and FIG.
FIG. 4 is a conceptual diagram showing types of trough units, and FIG. 4 is a cross-sectional view showing another embodiment of the air-floating belt conveyor.

The trough unit 3 is, as shown in FIG.
It has a unit trough 4 on the carrier side and a unit trough 5 on the return side having an arc-shaped cross section provided with air holes 4a and 5a, and a duct 6 on the carrier side and a duct 7 on the return side are provided on the lower surface side, respectively. In addition, each air hole 4a, 5a
Are provided at predetermined intervals along the longitudinal direction at the center of the unit troughs 4 and 5 in the width direction. In ducts 6 and 7,
Air of a predetermined pressure is supplied by blowers (air supply means) 8 and 9, whereby air is blown out from the air holes 4 a and 5 a onto the unit troughs 4 and 5.

The belt 1 is installed on each of the unit troughs 4 and 5, and drives the blowers 8 and 9 to eject air from the air holes 4 a and 5 a, so that the belt 1 and each of the unit troughs 4 and 5 are connected to each other. An air layer is formed between the belts, and the belt 1 can travel with the belt 1 floating by utilizing the static pressure of the air layer. The amount of air blown out from each of the air holes 4a, 5a is adjusted by the driving state of each of the blowers 8, 9 and the opening and closing of a valve provided in each of the blowers.

Although not shown, each trough unit 3
Has a frame body, on which a carrier-side unit trough 4, a return-side unit trough 5, and blowers 8, 9 are installed. The frame body is composed of, for example, a pair of left and right side plates, a cover attached to the upper surface of the side plates, and columns and beams supporting the side plates.

Each trough unit 3 includes unit troughs 4 and 5
Is standardized to 3 m to 10 m (for example, 10 m). The configuration shown in FIG. 1 employs a configuration using unit troughs 4 and 5 on both the carrier side and the return side (that is, a configuration using an air levitation method on both the carrier side and the return side). However, a roller system in which a plurality of rollers are arranged instead of the unit trough 5 on the return side may be adopted. Further, the air levitation system and the roller system may be combined on the return side.

By arranging two or more of these trough units 3 in the longitudinal direction (three arrangements are shown in FIG. 1), the trough 2 on the carrier side and the return side required for traveling of the belt 1 are arranged. Of the trough 2a. At this time, the trough units 3 are arranged in a positional relationship such that the traveling of the belt 1 is not hindered. For example, there is a form in which the trough units 3 are arranged without gaps, and a form in which the trough units 3 are arranged at a predetermined interval (10 cm or the like). Further, a roller may be provided in a gap between the trough units 3.

FIG. 2 shows the arrangement of the trough unit 3 and illustrates a case where a load is transported between places having a difference in height. The point that the belt 1 is wound around the two pulleys P is as described above. In the conveyor of such a form, a horse back part 10 which is a part bent downward from a horizontal state, and a catenary part 11 which is a part bent upward from a horizontal state are formed,
It is necessary to increase or decrease the levitation force applied to the belt 1 in each part.

Specifically, the back 1 of the horse has a belt 1
Is exerted in the direction in which the belt 1 is pressed against the trough, while the force acts in the catenary portion 11 in the direction in which the belt 1 moves away from the trough. In this case, if the blowers 8, 9 were driven in the same manner as in the horizontal state, the belt 1
Surfacing is insufficient, and it comes into contact with the trough and hinders traveling.
Conversely, the belt 1 floats more than necessary at the catenary portion 11.

Therefore, the blower 8a, 9a of the trough unit 3a forming the back part 10 of the horse is set so as to supply more air than that in the horizontal state, and the blower of the trough unit 3b forming the catenary part 11 is set. It is set so that less air is supplied to 8b and 9b than in the horizontal state. As a result, air necessary for floating the belt 1 is efficiently and appropriately supplied to the back portion 10 and the catenary portion 11 of the horse.

As described above, the amount of air supplied per unit time by the blowers 8, 9 (air supply means) can be partially changed, as compared with the conventional type in which ducts communicate with each other. 2, it can easily cope with the back part 10 and the catenary part 11 of the horse.

FIG. 3 shows the types of the trough units 3. Each of the unit troughs (a) to (f) has the same arc-shaped cross section and can be connected to each other. Trough units 12 to 16 shown in (b) to (f)
Is calculated by using the trough unit 3 having a total length L shown in FIG. 3A and calculating the number of units required for the entire length of the conveyor, by filling in the missing portion with one of the trough units, or forming a part of the conveyor. This is used, for example, when a plurality of short trough units are arranged to gently bend the belt 1 with respect to the bent portion (for example, the horse back portion 10 and catenary portion 11 shown in FIG. 2).

Referring to FIG. 3,
(A) is a trough unit 3 shown in FIG. 1, which uses unit troughs 4 and 5 having a length L of 3 m to 10 m as described above. (B) is a unit trough 1 having a length of ／ L with respect to a length L of the unit troughs 4 and 5 of the trough unit 3.
7 and 18, (c) shows unit troughs 19 and 20 having a length of ２ L with respect to length L, and (d) shows a length of 1 with respect to length L.
(E) is unit troughs 23 and 24 having a length of 1 / 3L with respect to length L, and (f) is unit having a length of 1 / 4L with respect to length L Trough 25, 26
Are used respectively.

Each of the trough units 12 to 16 has an air hole (not shown) for ejecting air in each of the unit troughs 17 and the like, and a duct is formed in accordance with the length of each of the unit troughs 17 and the like. Further, a blower is provided as air supply means to each duct (the duct and the blower are not denoted by reference numerals in FIG. 3). At this time, it is optional to use a blower having a smaller rated capacity as the length of the unit trough becomes shorter.

As described above, by appropriately combining the trough units 3, 12 to 16 having a length of L to Ｌ L, it is possible to easily cope with the installation of conveyors having different total lengths. By arranging a plurality of short trough units (for example, the trough units 14, 15, 16, etc.), the belt 1 can be bent gently. However, whether or not the trough unit group is configured as shown in FIG. 3 is optional.

The above-described trough units 3, 12-1
In FIG. 6, as shown in FIGS. 1 and 3, blowers 8 and 9 are independently supplied to a duct 6 on the carrier side and a duct 7 on the return side.
, Air may be supplied to the ducts 6 and 7 by a single blower.
In this case, the amount of air supplied to each of the ducts 6 and 7 is adjusted by a valve or the like. Further, the configuration is not limited to a configuration in which each of the trough units 3 includes a blower.

FIG. 4 shows a state in which one blower 27, 28 is provided for each of the two ducts 6, 7 in the two trough units 3. The amount of air supplied to each duct 6, 6 by the blower 27 is adjusted by valves 29, 30. The amount of air supplied to each duct 7, 7 by the blower 28 is adjusted by valves 31, 32.
Done by

As described above, by sharing the blower in the plurality of trough units 3, the installation cost of the blower can be reduced. In this type, blowers 27 and 2
There are two types, a trough unit having a blower 8 and a trough unit without a blower. By connecting the pipes at the time of construction on site, appropriate air can be supplied to any of the trough units. In FIG. 4, the blowers 27 and 28 are shared by two trough units 3, but the blowers may be shared by three or more trough units 3.

The various shapes and combinations of the constituent members shown in the above-described embodiment are merely examples, and can be variously changed based on design requirements without departing from the spirit of the present invention.

[0029]

As described above, the air-floating belt conveyor according to claim 1 forms a standardized trough unit and connects a plurality of the trough units to form a trough necessary for the entire length of the conveyor. It can be adjusted by the number of trough units for different length conveyors,
Versatility can be ensured. In addition, since it is sufficient to have the minimum structure necessary for forming the trough unit, unnecessary members can be eliminated, and the size and weight of the conveyor can be easily reduced as a whole. . Furthermore, when air leakage or the like occurs partially due to a defect in the duct or the like, the air leakage does not affect the whole, and it is possible to reduce trouble in the operation of the conveyor.

Since the air levitation type belt conveyor according to the second aspect has both the carrier side and the return side as a unit trough of the trough unit, the air levitation type of the belt is adopted on both the carrier side and the return side. This trough unit can be easily applied.

The air levitation type belt conveyor according to claim 3 is suitable for a belt unit which is disposed at a portion where a belt is bent, such as a portion forming a horse back or a catenary in the conveyor. So that the air supply amount per unit time by the air supply means of the trough unit can be set appropriately.

[Brief description of the drawings]

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

FIG. 2 is a side view showing the entire air levitation type belt conveyor using a trough unit.

FIG. 3 is a conceptual diagram showing types of trough units.

FIG. 4 is a cross-sectional view showing another embodiment of the air levitation type belt conveyor.

FIG. 5 is a perspective view showing a conventional air levitation type belt conveyor.

[Description of Signs] 1 Belt 2, 2a Trough 3 Trough Unit 4, 5 Unit Trough 8, 9 Blower (air supply means)

Claims (3)

[Claims] 1. An air supply between a trough and a belt,
An air-floating belt conveyor for traveling with the belt floated, comprising: a unit trough formed to have a predetermined length; and air supply means for supplying air between the unit trough and the belt. An air levitating belt conveyor, wherein the trough is formed by arranging at least two trough units in a longitudinal direction. 2. The air levitation belt conveyor according to claim 1, wherein the trough unit includes both a carrier side and a return side as the unit trough. 3. The air floating type according to claim 1, wherein the air supply means sets an air supply amount per unit time according to an arrangement position of each of the trough units. Belt conveyor.