JP2002284325A - Floating type belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem wherein a belt cannot be floated again because gas for floating is not supplied to a part of a contact state when the belt comes into contact with a guide plate. SOLUTION: Floating gas supply pipes 5 and 6 are provided in the longitudinal directions of lower ends of guide plates 1 and 2 for guiding conveyor belts 3 and 4. In the floating gas supply pipes 5 and 6, floating gas supply ducts 10 and 11 for supplying pressure gas 7 are provided at prescribed intervals in the longitudinal directions of the guide plates 1 and 2. The floating gas supply ducts 10 and 11 are formed in the substantially belt width directions of the conveyor belts 3 and 4. A plurality of air supply ports 8 and 9 are provided in the belt width directions of the floating gas supply ducts 10 and 11 to supply pressure gas 7 from the width direction of a lower surface of the belt. The belts 3 and 4 coming into contact with the guide plates 1 and 2 once are floated at the positions of the floating gas supply ducts 10 and 11 again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating belt conveyor device for smoothly transporting bulk materials such as coal and grains such as wheat, soybeans and rice, and more particularly, a device for supplying a floating gas. The present invention relates to a floating belt conveyor device.

[0002]

2. Description of the Related Art Conventionally, bulk materials (for example, coal, gypsum, and wet ash in thermal power plants, iron ore and auxiliary materials in steel mills), and grains such as wheat, soybeans, and rice (hereinafter collectively referred to as "grain") have been known. A conveyor device is used to smoothly transport the "conveyed object"), but in recent years, a floating belt conveyor device has been regarded as useful as a measure against dust and noise.

FIG. 3 is a side view showing an example of a floating belt conveyor device. In this figure, a floating type belt conveyor device for a tubular trough having a closed structure is shown. In the case of this floating belt conveyor device, the trough serves as a guide plate for the conveyor belt. As shown in the figure, a conveyor belt is provided between the inlet 51 and the outlet 52, and the conveyed object supplied from the inlet 51 is transported to the outlet 52 by the carrier-side conveyor belt 53 on the guide plate 56. This conveyor belt 53 serves as a return side conveyor belt 54 as a guide plate 55
It is configured to return through the (trough). The conveyor belts 53 and 54 are configured to convey an object while floating by a predetermined amount from the inner surfaces of the guide plates 55 and 56 by the pressurized gas supplied from the blower 57 to the floating gas supply pipe 58.

FIG. 4 is a pressure distribution diagram in a longitudinal sectional direction in such a floating type belt conveyor device. The principle of gas floating of the conveyor belt 54 (53) is based on the lowest point of the guide plate 55 (56). By supplying the pressurized gas 60 between the guide plate 55 (56) and the belt 54 (53) from the air supply hole 59 provided at the position,
The guide plate 55 (56) and the belt 54 (53)
The belt 54 (53) is levitated by forming a gas film between itself and the lower surface of the belt 54. At this time, due to the gas pressure supplied from the air supply holes 59, the lower surface of the belt has a pressure distribution as illustrated, and the conveyed object 61 is conveyed with the conveyor belt 54 (53) floating. ing.

FIG. 5 is a longitudinal sectional view showing an example of such a floating type belt conveyor device. The same components as those shown in FIG. 3 will be described with the same reference numerals. As shown in the figure, a guide plate on the carrier side and a return side of the conveyor belts 53 and 54 are formed by a tubular outer guide plate 55 and an inner guide plate 56 provided in the outer guide plate 55. Conveyor belt 5 guided by inner guide plate 56
3 is the carrier side, and the conveyor belt 54 guided by the outer guide plate 55 is the return side.

[0006] These outer guide plates 55
A floating gas supply pipe 58 is provided in the longitudinal direction of the lower end of the inner guide plate 56, and a pressure is applied between the guide plates 55, 56 and the belts 53, 54 in the longitudinal direction substantially at the center of the floating gas supply pipe 58. Air supply holes 59 for supplying gas 60 are provided at a predetermined pitch. Floating gas supply duct 6 for supplying pressurized gas 60 to this floating gas supply pipe 58
The reference numerals 2 and 63 are provided at predetermined positions in the longitudinal direction of the guide plates 55 and 56. The pressurized gas 60 supplied to the floating gas supply ducts 62 and 63 from the blower 57 via the pipe 64 is supplied to the floating gas supply pipe 58, and supplied in the longitudinal direction of the guide plates 55 and 56 by the floating gas supply pipe 58. Is to be done.

According to the levitation type belt conveyor device configured as described above, the pressurized gas 60 supplied from the blower 57 to the levitation gas supply ducts 62 and 63 via the pipe 64.
Flows to the gas supply pipe 58, and is supplied from the gas supply pipe 58 to the space between the lower surfaces of the belts 53 and 54 and the guide plates 55 and 56 via the air supply holes 59 to float the belts 53 and 54.

FIG. 6 is a longitudinal sectional view showing a gas flow in a belt portion of the floating type belt conveyor device, and shows a pressure gas supplied from an air supply hole 59 provided at the lowermost end of a guide plate 55 (56). The belt 60 floats by a predetermined amount (for example, 1 mm) by passing the guide plate 55 (56) and the belt 54 (53), and is discharged from both ends in the width direction of the belt 54 (53). .

[0009] As this kind of prior art, Japanese Patent Laid-Open Publication No.
There is an invention described in Japanese Patent No. 5618 and an invention described in Japanese Patent No. 3027539, but these inventions relate to noise countermeasures and inspection countermeasures, and do not relate to a gas supply mechanism for floating a belt as in the present invention. Absent.

[0010]

However, in the case of the system shown in FIGS.
Since the belt 54 (53) is floated only by the pressurized gas supplied from the air supply hole 59 provided in the lower end longitudinal direction of (56), for example, the guide plate 55 (56)
The traveling belt 54 (53) may come into contact with the guide plate 55 (56) due to factors such as the shape irregularity, condensation of water vapor, or vibration of the guide plate 55 (56).

When the belt 53 once comes into contact with the guide plate 55 (56), the pressurized gas 60 supplied from the air supply hole 59 flows from the other air supply hole 59 having low resistance to the lower surface of the belt 54 (53). Therefore, the pressurized gas 60 is not supplied to the contacted portion.

Therefore, once the belt 54 (53) comes into contact with the guide plate 55 (56), the contact state is maintained, and the belt 54 (53) cannot be re-emerged, and the friction of this portion is As a result, the transport resistance increases. In particular, in the case of the conveyor belt 53 on the carrier side, since the load of the transported object 61 is applied, once it comes into contact with the guide plate 56, the transport resistance greatly increases.

[0013]

Therefore, in order to solve the above-mentioned problems, the present invention provides a floating gas supply pipe in the longitudinal direction of the lower end of a guide plate for guiding a conveyor belt, and the floating gas supply pipe is connected to the floating gas supply pipe. Are provided at predetermined intervals in the longitudinal direction of the guide plate, the floating gas supply duct is formed substantially in the belt width direction of the conveyor belt, and a plurality of floating gas supply ducts are provided in the belt width direction of the floating gas supply duct. An air supply hole is provided to supply the pressurized gas from the width direction of the lower surface of the belt. By providing a plurality of air supply holes in the width direction of the position of the floating gas supply duct, the belt once in contact with the guide plate at another location can move in the width direction of the lower surface of the belt when moving to the position of the floating gas supply duct. Since the pressure gas for floating is supplied from, the belt can be floated again from the guide plate. Furthermore, by providing the width direction air supply holes only at the position of the gas supply duct, the belt in contact with the guide plate can be easily separated from the guide plate without providing a gas outlet in the entire width of the belt over the entire length in the belt longitudinal direction. An increase in transport resistance can be prevented.

If a floating gas supply duct provided with an air supply hole in the width direction of the conveyor belt is provided only on the guide plate of the carrier belt on the carrier side, there is a high possibility that the object to be transported is brought into contact with the guide plate. The carrier belt on the carrier side can be re-emerged in the gas supply duct portion, and the belt can be re-emerged with a small number of components so as to suppress conveyance resistance.

Further, if the pitch of the air supply holes provided in the floating gas supply duct is formed narrow on the carrier side and wide on the return side, the conveyor belt on the carrier side for transporting the article to be transported can be uniformly levitated from the width direction. Can be.

Furthermore, if a supply amount adjusting valve for the pressurized gas supplied to the floating gas supply duct is provided in a path for supplying the pressurized gas to the floating gas supply duct on the carrier side and the return side, the specific gravity of the conveyed object can be reduced. The floating amount of the conveyor belt can be easily set arbitrarily according to the transport speed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a floating type belt conveyor device showing an embodiment of the present invention, and FIG.
FIG. 3 is an explanatory diagram showing a flow of a pressurized gas in the floating belt conveyor device. Also in this embodiment, a floating belt conveyor device in which a circular tubular trough having a closed structure serves as a guide plate for a conveyor belt will be described as an example.

As shown in FIG. 1, a guide plate for the conveyor belts 3 and 4 on the carrier side and the return side is formed by a tubular outer guide plate 1 and an inner guide plate 2 provided in the outer guide plate 1. Are formed. The conveyor belt 3 guided by the inner guide plate 2 is on the carrier side, and the conveyor belt 4 guided by the outer guide plate 1 is on the return side. The inner guide plate 2 is formed in a U-shaped curved surface such that the conveyor belt 3 can be curved and a predetermined amount of the object 15 can be conveyed. The outer guide plate 1 is formed by a lower inner surface of a tubular trough. The conveyor belts 3 and 4 are continuous and integral, and are formed of a flexible material that can travel in a curved shape along the inner surfaces of the guide plates 1 and 2.

Floating gas supply pipes 5 and 6 are provided at the lower end longitudinal direction of the outer guide plate 1 and the inner guide plate 2.
Is provided between the guide plates 1 and 2 and the conveyor belts 4 and 3 from the floating gas supply pipes 5 and 6.
Are provided. The air supply holes 8 and 9 are provided at a predetermined pitch in the longitudinal direction of the guide plates 1 and 2 as described above.

At predetermined positions in the longitudinal direction of the guide plates 1 and 2, floating gas supply ducts 10 and 11 for supplying a pressurized gas 7 to the floating gas supply pipes 5 and 6 are provided. The floating gas supply ducts 10 and 11 are provided to extend in the width direction of the guide plates 1 and 2, and are provided over substantially the entire width of the conveyor belts 3 and 4. In this embodiment, the conveyer belt 3 is formed up to near the widthwise end of the conveyor belt 3 so as to sandwich the floating gas supply pipes 5 and 6.

A plurality of air supply holes 8, 9 are provided in the belt width direction of the floating gas supply ducts 10, 11 provided as described above. In this example, they are provided at equal intervals in the width direction from the air supply holes 8, 9 of the floating gas supply pipes 5, 6 located at the lowermost end of the conveyor belt 3. If the air supply holes 8 and 9 are provided equally in the width direction (left and right directions in the figure) with respect to the air supply holes 8 and 9 at the center, the pressurized gas 7 is evenly injected to the lower surfaces of the conveyor belts 3 and 4. The conveyor belts 3 and 4 can be stably floated. The pitch at which the air supply holes 8 and 9 are provided in the width direction may be appropriately set according to the specific gravity, the transport amount, and the transport speed of the transported object 16. In particular, the pitch of the air supply holes 9 on the carrier side on which the load is conveyed while the object 16 is conveyed may be reduced.

The floating gas supply ducts 10, 11
Is connected to a pipe 13 which is a path for supplying the pressurized gas from the blower 12, and the pressurized gas whose flow rate has been adjusted by the floating gas supply amount adjusting valves 14 and 15 provided in the pipe 13 is supplied to the floating gas supply. The air is supplied to the ducts 10 and 11.

Accordingly, the pressurized gas 7 supplied to the floating gas supply ducts 10 and 11 is
A plurality of air supply holes 8 provided in the width direction at positions 0 and 11;
9 to the entire lower surface of the conveyor belts 3 and 4 in the width direction, and at other positions, the floating gas supply ducts 10 and
11 to the floating gas supply pipes 5, 6, and supply air holes 8, provided at the lowermost ends of the guide plates 1, 2 in the longitudinal direction.
9 to the lower surfaces of the conveyor belts 3 and 4.

According to the levitation type belt conveyor device 17 configured as described above, the pressurized gas 7 supplied to the levitation gas supply ducts 10 and 11 from the blower 12 via the pipe 13 is supplied to the guide plates 1 and 2. The gas flows to the floating gas supply pipes 5 and 6 provided in the longitudinal direction of the lower end, and from the floating gas supply pipes 5 and 6, the air supply holes 8 provided in the longitudinal direction at the center of the lower end of the guide plates 1 and 2 at a predetermined pitch. The belts 3 and 4 are supplied between the lower surfaces of the belts 3 and 4 and the guide plates 1 and 2 through the belt 9 so as to float. At the positions of the floating gas supply ducts 10 and 11, the pressurized gas is supplied from the plurality of air supply holes 8 and 9 provided in the width direction of the conveyor belts 3 and 4 toward substantially the entire width of the conveyor belts 3 and 4. .

Therefore, as shown in FIG. 2, the pressure gas 7 supplied from the air supply holes 8 (9) provided at almost the entire width direction of the conveyor belt 4 (3) at the positions of the gas supply ducts 10 and 11 The guide plate 1 (2) and the lower surface of the belt 4 (3) are supplied from substantially the entire width direction and discharged from both ends in the width direction of the belt 4 (3). When the conveyor belt 4 (3) moving in contact with the conveyor belt 4 (3) moves to the position of the floating gas supply ducts 10, 11, the belts 3, 4
Is supplied in the entire width direction of the belt to cause the entire belt to float again.

The gas supply ducts 10 and 11 provided with the gas supply holes 8 and 9 are provided at one or two locations for each guide plate 1 (2) (for example, every 2 m) formed in the longitudinal direction for convenience of manufacture. If a plurality of air supply holes 8, 9 are provided in the width direction at the positions of the gas supply ducts 10, 11, the gas supply ducts 10, 10 installed at a constant pitch in the longitudinal direction of the belt conveyor device 17 are provided. Since the conveyor belt 3 can be re-floated at the position 11, the stable floating state of the conveyor belts 3 and 4 can be maintained.

Moreover, since the gas supply ducts 10 and 11 are used as gas chambers, the conveyor belts 3 and 4 in contact with each other can be re-emerged with a simple and compact structure. In particular, in the case of the conveyor belt 3 on the carrier side, although it is easy to come into contact with the guide plate 2 due to the load of the transported object 16, stable re-floating can be performed at the position of the floating gas supply duct 11.

Since the pressurized gas 7 is supplied from substantially the entire width of the conveyor belts 3 and 4 at the positions of the gas supply ducts 10 and 11 as described above, the belts 3 and 4 that have once contacted at other portions are also positioned at the gas supply duct positions. By supplying a floating gas to the lower surface of the belt from a wide range in the width direction, the belt can be re-floated, preventing the transport resistance from increasing due to the contact between the conveyor belts 3, 4 and the guide plates 1, 2. The belt can be conveyed with little power, and the conveyor belt can always run stably.

In the above-described embodiment, the guide plate 1 is formed by a tubular trough. However, the form of the guide plates 1 and 2 is not limited to the above-described embodiment, but may be other forms. You may.

The above-described embodiment is one embodiment, and various changes can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

[0031]

The present invention is embodied in the form described above and has the following effects.

Since the conveyor belt once in contact with the guide plate can be re-floated at the position of the floating gas supply duct, a floating belt conveyer device that conveys the belt with less power while preventing an increase in conveyance resistance due to the contact is provided. It becomes possible to configure.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a floating belt conveyor device showing one embodiment of the present invention.

FIG. 2 is an explanatory view showing a gas flow in the floating belt conveyor device of FIG.

FIG. 3 is a side view showing the whole of a conventionally used floating type belt conveyor device.

FIG. 4 is an explanatory diagram showing a gas pressure distribution when the belt floats in the floating belt conveyor device shown in FIG. 3;

FIG. 5 is a longitudinal sectional view of the floating belt conveyor device shown in FIG. 3;

FIG. 6 is an explanatory diagram showing a gas flow in the floating belt conveyor device of FIG. 4;

[Description of Signs] 1 ... Outer guide plate 2 ... Inner guide plate 3 ... Carrier side conveyor belt 4 ... Return side conveyor belt 5,6 ... Floating gas supply pipe 7 ... Pressurized gas 8,9 ... Supply hole 10,11 ... Floating Gas supply duct 12 ... Blower 13 ... Piping 14, 15 ... Floating gas supply amount control valve 16 ... Conveyed object 17 ... Floating belt conveyor device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Kotaki 3-1-1, Higashi-Kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Kobe Plant (72) Inventor Tokichi Izumi 1 Kawasaki-cho, Akashi-shi, Hyogo No. 1 Kawasaki Heavy Industries, Ltd. Akashi Factory F-term (reference) 3F023 AA01 AB01 AB10 BA03 BB01 BC01

Claims (4)

[Claims] A floating gas supply pipe is provided in a longitudinal direction of a lower end of a guide plate for guiding a conveyor belt, and a floating gas supply duct for supplying a pressurized gas to the floating gas supply pipe is provided at a predetermined interval in a longitudinal direction of the guide plate. The floating gas supply duct is formed substantially in the belt width direction of the conveyor belt, and a plurality of air supply holes are provided in the belt width direction of the floating gas supply duct so that the pressure gas is supplied from the width direction of the belt lower surface. Levitation type belt conveyor device. 2. A floating gas supply duct provided with air supply holes in the width direction of the conveyor belt is provided only on a guide plate of the carrier-side conveyor belt.
A floating belt conveyor device as described in the above. 3. The levitating belt conveyor device according to claim 1, wherein the pitch of the air supply holes provided in the levitating gas supply duct is formed narrow on the carrier side and wide on the return side. 4. A supply gas regulating valve for supplying a pressurized gas to the floating gas supply duct is provided in a path for supplying a pressurized gas to the carrier side and return side floating gas supply ducts. The floating belt conveyor device according to any one of claims 1 to 3.