JP3333713B2 - Cleaning device for airborne conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning an air-floating conveyor. In air-floating conveyors,
When the scraping efficiency of the belt cleaner is reduced, the powder of the transported material adhering to the belt surface cannot be completely scraped off, and whenever the belt comes into contact with the trough, or the belt vibrates slightly, the powder in the trough falls and the transport time is reduced. As the process progresses, the powder falling may also grow and grow, thereby closing the air blowing holes.
If the clogging occurs, a uniform air film cannot be formed between the belt and the trough, and the belt and the powder fall into contact with each other, which wastes power and wears the belt. The present invention relates to a cleaning device for removing such powder fall.

[0002]

2. Description of the Related Art Conventionally, in order to cope with such a problem, a part of the belt is periodically lifted from a trough to check the amount of powder dust. Etc. were manually cleaned.

[0003]

However, in the above-mentioned conventional method, since a part of the belt must be lifted from the trough, which is a large-scale operation, the frequency of the inspection and the number of cleanings are small. In addition, it was not possible to efficiently prevent the belt from being worn due to the accumulation of powder fall.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cleaning device which can easily eliminate a blockage of an air blowing hole, and can effectively prevent abrasion of a belt without consuming unnecessary power. I do.

[0005]

According to a first aspect of the present invention, there is provided a cleaning device for an air-floating type conveyor, wherein a plurality of air outlets are formed at the bottom of a trough-shaped trough at intervals along a longitudinal direction. An air levitation conveyor in which an air duct communicating with a hole is fixed to a bottom surface of the trough, and a belt is supported on the trough and travels via an air film formed by being ejected from the air blowing hole. A levitation air pipe and levitation air supply source connected to the air duct for supplying levitation air, and a high-pressure air pipe and high-pressure air supply source for supplying high-pressure air connected to the air duct via an on-off valve And a washing water supply pipe for supplying washing water and a washing water discharge pipe for discharging the washing water, which are connected to the air duct via an on-off valve. To. The cleaning device for an air-floating conveyor according to claim 2, wherein a number of air outlets are formed at intervals along the longitudinal direction at the bottom of the trough-shaped trough, and an air duct communicating with the air outlets is provided in the trough. A high-pressure air pipe that supplies high-pressure air and a high-pressure air pipe that supplies high-pressure air are fixed to the bottom surface of the air-floating conveyor in which a belt is supported on a trough and travels via an air film formed by blowing out from the air blowing hole. An air supply source, a high / low pressure switching circuit interposed between the high-pressure air pipe and the air duct, a cleaning water supply pipe for supplying cleaning water connected to the air duct via an on-off valve, and a cleaning water A high-low pressure switching circuit, comprising a high-pressure circuit provided with an on-off valve, and a low-pressure circuit provided with a pressure-reducing valve and an on-off valve on the inlet side of the pressure-reducing valve. Characterized in that it continues to. According to a third aspect of the present invention, there is provided a cleaning device for an air-floating conveyor, wherein a pressure sensor for detecting an air pressure in the air duct is attached to the air duct. According to a fourth aspect of the present invention, in the cleaning device for an air-floating conveyor, a connection pipe for connecting a vacuum pipe of a vacuum car is attached to the air-floating pipe. According to a fifth aspect of the present invention, in the cleaning device for an air-floating conveyor, a connection pipe for connecting a vacuum pipe of a vacuum car is attached to the high-pressure air pipe.

According to the first aspect of the present invention, during normal operation of the conveyor, air for levitation is blown out from the air outlet to form an air film between the belt and the trough, and the belt is run. If air blowing holes are clogged or accumulated due to powder falling during normal operation, high-pressure air from a high-pressure air supply source is injected into the air duct through high-pressure air piping, causing impact around the air blowing holes. To blow off deposits. Further, if the washing water is guided from the washing water supply pipe into the air duct and flows from the washing water drain pipe, powder falling in the air duct can be discharged outside the machine. Claim 2
According to the invention, during normal operation, by opening the on-off valve on the inlet side of the pressure reducing valve of the low-pressure circuit in the high-low switching circuit and closing the on-off valve of the high-pressure circuit, the air duct has an appropriate low pressure to float the belt. When air is supplied and the on-off valve of the low-pressure circuit is closed and the on-off valve of the high-pressure circuit is opened, high-pressure air is supplied to the air duct, and the powder around the air outlet is blown off and removed. After that, the falling powder may be washed away with washing water. According to the third aspect of the present invention, the pressure in the air duct can be detected at any time, and the pressure in the air duct increases when the powder falling blocks the air blowout hole. The necessary time can be grasped appropriately. According to the fourth and fifth aspects of the present invention, powder falling around the air outlet can be sucked and collected in a vacuum car outside the machine, and in this case, there is no need to wash away with washing water. Therefore, it is possible to perform cleaning suitable for a conveyor that conveys cement, ash, or the like that dislikes moisture.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is an explanatory view of a cleaning device according to one embodiment of the present invention, FIG. 2 is an explanatory diagram of a cleaning device according to another embodiment of the present invention, FIG. 3 is a front view showing a floating air pipe, and FIG. FIG. 5 is a front view showing a cleaning water supply pipe, FIG. 6 is a front view showing a cleaning water discharge pipe, FIG. 7 is an overall side view of an air floating conveyor, and FIG. FIG. 9 is a cross-sectional view of the cylindrical shell 1 shown in FIG. 9, and FIG. 9 is a plan view showing the carrier trough 11 shown in FIG.

First, the basic structure of an air-floating conveyor will be described with reference to FIGS. Reference numeral 1 denotes a circular cylindrical shell of a conveyor, and a plurality of the cylindrical shells 1 are connected to form an intermediate portion. Although three cylindrical shells 1 are shown in the figure, the number may be two or less or four or more. 2 is a head pulley, 3 is a tail pulley, around which an endless belt 4 is wound. 5 is a fan for lifting the belt, and 6 is an air pipe.

The cylindrical shell 1 is composed of an upper shell 1a and a lower shell 1b which are cut in the axial direction and bisected in the diameter direction. The lower shell 1
From both sides of the inner wall at the upper end of b, and from both sides of the inner wall of the middle section, a plurality of brackets 8 each having two stages of left, right, upper and lower protruding inward are attached at intervals in the axial direction,
Each bracket 8 is fixed to right and left and up and down two stages of support frames 9 using an angle material. Of these support frames 9, the carrier trough 11 is detachably attached to the upper left and right support frames 9, and the return trough 12 is detachably attached to the lower left and right support frames 9.

Each of the troughs 11 and 12 is a trough-shaped member, and has a horizontal flange portion 13 on both side edges. The flange portion 13 is placed on the support frame 9 and connected by bolts. It has become.

At the center of the lower surface of each of the troughs 11, 12, a plurality of air outlets 14 are formed at intervals in the longitudinal direction, and an air duct 15 for supplying air to the air outlets 14 is attached. ing. The air duct 15 is connected to the fan 5 via the air pipe 6 (see FIG. 3). The air supplied from the air duct 15 is ejected upward from the air blowing holes 14 and enters between the belt 4 running on the upper surfaces of the troughs 11 and 12 to form an air film. Is reduced.

Therefore, in the above-mentioned conveyor, when air is supplied to the lower surface of the belt by the air pipe 6 while driving the head pulley 2 and circulating the belt 4,
The belt 4 runs on an air film formed between the belt 4 and the troughs 11 and 12, and can convey articles on the belt with extremely low resistance.

Next, a cleaning device according to a first embodiment will be described with reference to FIG. 1 and FIGS. As shown in FIGS. 1 and 3, a floating air pipe 6 for floating and supporting the belt 4 and a low-pressure fan 5 serving as a floating air supply source are provided in air ducts 15 on the lower surfaces of the troughs 11 and 12. It is connected. In addition, as shown in FIGS. 1 and 4, a high-pressure air pipe 20 and a high-pressure fan 21 serving as a high-pressure air supply source are connected to each air duct 15 by an on-off valve 2.
2 are connected.

Further, as shown in FIGS. 1 and 5, a cleaning water supply pipe 31 for supplying cleaning water is connected to each air duct 15 via an on-off valve 32, as shown in FIGS. 1 and 6. A cleaning water discharge pipe 33 for discharging cleaning water is connected to each air duct 15 via an on-off valve 34. Also, as shown in FIG.
A connection pipe 26 is mounted at an appropriate position via an on-off valve 25 so that a connection pipe at the tip of the connection pipe 26 can be connected to a vacuum pipe 28 of a vacuum car 27.

In FIG. 1, reference numeral 35 denotes a pressure sensor attached to the air duct 15, and a pressure gauge for detecting air pressure in the air duct 15 or a differential pressure gauge for detecting a change in air pressure is used.

In the cleaning device according to the present embodiment, if the air blowing holes 14 are clogged due to the accumulation of powder falling during operation, the air pressure in the air duct 15 increases. If this is detected by the pressure sensor 35, cleaning is required. The time can be accurately grasped.

There are two cleaning methods. The first method is as follows. The high pressure fan 21 is driven, and the on-off valve 2
When the nozzle 2 is opened, high-pressure air is injected into the air duct 15, and the impact at that time blows off the powder from the air outlet 14 and removes it. In addition, on-off valves 32 and 34
And open the washing water from the washing water supply pipe 31 to the air duct 1
5 and discharged from the washing water discharge pipe 33, all the powder falling in the air duct 15 is washed away, and the cleaning is completed. This cleaning method is suitable for transportation products that do not dislike moisture, and has an advantage that cleaning can be performed almost completely.

The second cleaning method is a method that does not use cleaning water, and is a method in which the vacuum pipe 28 of the vacuum car 27 is connected to the connection pipe 26 of the air line 6 for floating and suction is performed. First, as in the case described above, the powder falling from the air blowing holes 14 is blown off by high-pressure air and removed. Next, the powder in the air duct 15 is sucked by suction of the vacuum car 27, and the removed powder is taken into the vacuum car 27. This cleaning method is suitable for conveyors that transport cement or ash that dislikes moisture.

Next, a cleaning device according to a second embodiment will be described with reference to FIG. This embodiment is a high pressure air pipe 2
The belt floating air and the cleaning high-pressure air are supplied only by 0 and the high-pressure fan 21. The high-pressure air pipe 20 and each air duct 15 are connected via a high-low pressure switching circuit 40. The high / low pressure switching circuit 40 has a high voltage circuit 41 and a low voltage circuit 42 connected in parallel.
2 includes a pressure reducing valve 44 and opening / closing valves 45 and 46 on its inlet and outlet sides.
Is interposed.

The connection pipe 26 to the vacuum car 27 is connected to the high-pressure air pipe 20 and the cleaning water supply pipe 31
The washing water discharge pipe 33 is configured in the same manner as in the embodiment of FIG.

In this embodiment, for normal operation, the on-off valve 43 of the high / low pressure switching circuit 40 is closed and low-pressure floating air is supplied to the air duct 15 through the pressure reducing valve 44. When cleaning, the pressure reducing valve 44 of the high / low pressure switching circuit 40
The opening / closing valves 45 and 46 before and after are closed and the opening / closing valve 43 is opened to supply high-pressure air to the air duct 15 through the high-pressure circuit 41. By doing so, powder falling can be removed from the air blowing holes 14 by the impact of high-pressure air, and the washing water can be further removed from the washing water supply pipe 31 and the washing water discharge pipe 33.
When flowing through, the powder falling in the air duct 15 can be washed away.

In a conveyor for handling ash or cement which dislikes water, if the air is vacuumed as in the previous embodiment, the air duct 15 can be used without using water.
The powder falling inside can be removed.

[0023]

According to the first aspect of the present invention, high-pressure air from a high-pressure air supply source is injected into an air duct through a high-pressure air pipe, and an impact is applied to the air blowing holes to blow off attached matter. In addition, if cleaning water is guided from the cleaning water supply pipe into the air duct and flows from the cleaning water drain pipe,
Powder falling in the air duct can be discharged outside the machine.
According to the invention of claim 2, during normal operation, if the on-off valve on the inlet side of the pressure reducing valve of the low-pressure circuit in the high-low switching circuit is opened and the on-off valve of the high-pressure circuit is closed, the air duct is suitable for lifting the belt. When low-pressure air is supplied and the on-off valve of the low-pressure circuit is closed and the on-off valve of the high-pressure circuit is opened, high-pressure air is supplied to the air duct, and the dust from the air blowout holes is blown off and removed. After that, if the dust in the air duct is washed away with the washing water, the dust can be discharged outside the machine. According to the third aspect of the present invention, the pressure in the air duct can be detected at any time, and the pressure in the air duct increases when the powder falling blocks the air blowout hole. The necessary time can be grasped appropriately. According to the fourth and fifth aspects of the present invention, powder falling around the air outlet can be sucked and collected in a vacuum car outside the machine, and in this case, there is no need to wash away with washing water. Therefore, it is possible to perform cleaning suitable for a conveyor that conveys cement, ash, or the like that dislikes moisture.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a cleaning device according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a cleaning device according to another embodiment of the present invention.

FIG. 3 is a front view showing a floating air pipe.

FIG. 4 is a front view showing a high-pressure air pipe.

FIG. 5 is a front view showing a cleaning water supply pipe.

FIG. 6 is a front view showing a washing water discharge pipe.

FIG. 7 is an overall side view of the air-floating conveyor.

8 is a sectional view of the cylindrical shell 1 shown in FIG.

FIG. 9 is a plan view showing the carrier trough 11 shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cylindrical shell 5 belt floating fan 6 air pipe 11 carrier trough 12 return trough 14 air outlet 15 air duct 20 air pipe 21 high pressure fan 31 washing water supply pipe 33 washing water discharge pipe 40 high / low pressure switching circuit 44 decompression valve

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 45/22 B65G 15/00-15/28 B65G 15/60-15/64

Claims (5)

(57) [Claims] A plurality of air outlets are formed at the bottom of a trough-shaped trough at intervals along the longitudinal direction, and an air duct communicating with the air outlets is fixed to a bottom surface of the trough, A floating air pipe for supplying belt floating air connected to the air duct in an air floating conveyor in which a belt is supported on a trough and travels via an air film formed by blowing from an air outlet. And a floating air supply source, a high-pressure air pipe and a high-pressure air supply source for supplying high-pressure air connected to the air duct via an on-off valve, and washing water connected to the air duct via an on-off valve. A cleaning device for an air-floating conveyor, comprising a cleaning water supply pipe for supplying and a cleaning water discharge pipe for discharging cleaning water. 2. A trough-shaped trough has a plurality of air outlets formed at a bottom thereof at intervals along a longitudinal direction, and an air duct communicating with the air outlets is fixed to a bottom surface of the trough. A high-pressure air pipe and a high-pressure air supply source for supplying high-pressure air to an air-floating conveyor in which a belt is supported on a trough and travels via an air film formed by blowing from a blow-off hole; A high / low pressure switching circuit interposed between a pipe and the air duct, a cleaning water supply pipe connected to the air duct via an on-off valve, a cleaning water supply pipe, and a cleaning water discharge pipe discharging the cleaning water; Wherein the high-low pressure switching circuit comprises:
A cleaning device for an air-floating conveyor, wherein a high-pressure circuit provided with an on-off valve and a low-pressure circuit provided with a pressure-reducing valve and a low-pressure circuit provided on the input side of the pressure-reducing valve are connected in parallel. 3. The cleaning device for an air-floating conveyor according to claim 1, wherein a pressure sensor for detecting an air pressure in the air duct is attached to the air duct. 4. The cleaning device for an air-floating conveyor according to claim 1, wherein a connection pipe for connecting a vacuum pipe of a vacuum car is attached to the air-floating pipe. 5. The cleaning device for an air-floating conveyor according to claim 2, wherein a connection pipe for connecting a vacuum pipe of a vacuum car is attached to the high-pressure air pipe.