JPH0218228A - Method of preventing dust scattering in belt conveyor transportation system and device thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Production! BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor transportation system for transporting objects containing powder, such as ore containing powder, using a conveyor belt. In particular, the present invention relates to a method and apparatus for preventing powder adhering to a return conveyor belt from becoming dust and scattering.

In general, in the above-mentioned belt conveyor transportation system, the conveyor belt is passed between two pulleys (generally called a heel pulley and a tail pulley), and the conveyor belt is rotated in the passed state. . Then, ore, etc. is supplied onto the conveyor belt from one side of the two pulleys, usually the tail pulley, and the ore, etc. is transported to the head pulley by movement of the conveyor belt.

In such systems, the surface of the conveyor belt (i.e., the opposite side of the conveyor belt from the side that transports the ore, etc.), such as a return roller to support the conveyor belt, is typically used.
There are various members that come into contact with the surface on which ore etc. are loaded. Dust is scattered from the conveyor belt where these various members are present, particularly where they come into contact with the return roller.

Conventionally, as a device to prevent this dust from scattering,
In Fig. 0, which is known as shown in Fig. 6, an object to be transported, for example, is conveyed by riding on one running side of a conveyor belt 12 that is hooked on a head pulley 1 (the tail pulley is not shown) and rotates. After the ore is carried to the head pulley 1, it falls into the head chute 17 and is collected. A belt cleaner 15, a watering nozzle 6, and a draining roller 1 are installed on the upward running side (that is, the returning side) of the conveyor belt 12.
6 are arranged. The conveyor belt 12 that has bypassed the head pulley 1 is cleaned by a belt cleaner ]-5, and then subjected to water spraying from a water spray nozzle 6 and a draining action by a draining roller 16.

The powder on the conveyor belt 12 is collected into the mud receiving trough 18 without becoming dust by the above-mentioned water spraying and draining. In this way, dust is prevented from being generated at the snub pulley 2 and return roller 4 on the return side of the conveyor belt 12.

However, such a conventional device requires a large amount of water to completely wash away the powder, and therefore requires a large amount of water distribution equipment, which is uneconomical. It is also necessary to treat wastewater containing slime. The surface of the conveyor belt remains wet when the next item is placed on it.
This promotes the adhesion of powder to the conveyor belt 12 and creates the next source of emissions. Furthermore, since the moisture content of the transported object increases more than necessary, post-treatment of the transported object becomes necessary.

As an additional device to prevent the scattering of dust, areas where dust is likely to be generated are surrounded by a covering material such as plastic wrapper, and a dust collector is used to remove the powder that has accumulated within the covering material. However, in this device,
Since it is difficult to completely seal with the covering material, prevention of dust scattering is insufficient. or.

Generally, there are many places where dust is generated, and therefore the area is wide, so it is troublesome and uneconomical to cover all of them with the above-mentioned coating material.

Problems to be Solved by the Invention In view of the above-mentioned drawbacks of conventional devices, an object of the present invention is to provide a method and device that can economically and reliably prevent dust scattering without requiring a large amount of equipment. The task is to

(7) ELIQ to achieve "Tile".

The above task is achieved by the following means. That is,
A method for preventing scattering of dust in a belt conveyor transportation system in which an object containing powder is supplied onto a moving conveyor belt and the object is transported by the moving conveyor belt.

Sprinkle water on the surface of the return side conveyor belt after transportation charge Y of the transported object to such an extent that the surface of the conveyor belt 1- dries while the conveyor belt returns to the supply position of the transported object. This is a dust scattering prevention method characterized by uniformly moistening the surface of the return conveyor belt.

Further, it is a dust scattering prevention device in a belt conveyor transportation system that supplies a transported object containing powder onto a moving conveyor belt and transports the transported object by the moving conveyor belt. a water sprinkling means arranged opposite to the conveyor belt to sprinkle water on the conveyor belt; and a water sprinkling means arranged downstream of the water sprinkling stage to spray water onto the conveyor belt. The pressure roller extending uniformly upwards and the surface of the return side conveyor belt which has been sprinkled with water are sprinkled with water from a watering means so that the surface of the conveyor belt is dry before reaching the supply position of the transported object. This is a dust scattering prevention device characterized by having a water amount adjusting means for controlling the amount of water.

Furthermore, in the above-mentioned dust scattering prevention device, the water sprinkling means can also be moved in the width direction of the conveyor belt in accordance with the meandering of the conveyor belt.

L-shell A rotating conveyor belt has an outgoing side (usually the first running side of the conveyor belt) and a return side (usually the last running side of the conveyor belt), and the objects to be transported such as ore are usually Powder from ores, etc., is attached to the return side of the 5-conveyor belt, which is transported by the forward side of the conveyor belt, and the powder becomes dusty before the conveyor belt returns to the ore, etc. supply position. There is a risk that the liquid may scatter and cause a negative impact on the surrounding environment.

On the other hand, if the surface of the return conveyor belt is uniformly moistened as in the present invention.

Prevents dust scattering. Note that any means for sprinkling water may be used, but it is preferable to use one that can spray water as uniformly over the entire belt surface as possible.

Further, it is more convenient if a roller is disposed at a downstream position of the water sprinkling means to thinly spread the water on the belt.

Further, according to the present invention, the amount of water sprinkled is adjusted so that the surface of the conveyor belt dries while the conveyor belt returns to the supply position of the transported object. In other words, when the return conveyor belt goes around again to the forward side and a new conveyed object is supplied thereon, the conveyor belt is free of moisture. Yo-).

Transported items do not get wet unnecessarily.

Figure 1 is a side view of one embodiment of the dust scattering prevention device. In the figure, the conveyor belt 12 is passed around the navel pulley 1 and the tail pulley 5 and rotates in the direction of arrow A. The object to be transported 1, for example, ore supplied from the ore supply position P to the t-travel side of the conveyor belt 12 is transported by the conveyor belt 1.
2 is carried to the head pulley 1, and then falls into the rad chute 17 and is stored therein.

After conveying the ore, the conveyor belt 12 bypasses the head pulley 1 and then enters the return side (downward side in the figure).
Thereafter, after bypassing the tail pulley 5 at the left end, it is returned to the ore supply position P again.

On the return side of the conveyor belt 12, there is a belt cleaner 15 which is made of a plate-like member and whose tip contacts the surface of the conveyor belt 12, and snub pulleys 2a and 2b.
A plurality of return rollers 4 for supporting the conveyor belt 12 and a bend pulley 3 are provided 6. Relatively coarse particles of ore and other deposits remaining on the conveyor belt 12 that have bypassed the head pulley 1 are removed by a belt cleaner 1.
The head chute 17 or the return chute 23 next to it is scraped off from the top of the conveyor belt 12 by the head chute 17.
contained within. In the illustrated example, a plate member is used as the belt cleaner 15, but a brush, roller, etc. may also be used instead.

The conveyor belt 12 that has passed through the belt cleaner 15 does not have the above-mentioned coarse ore deposited on it, but fine-grained powder that causes dust is deposited on the conveyor belt 12 . If this powder continues to move as the return side conveyor belt 12 moves, the powder will become dust and scatter every time it comes into contact with a plurality of return rollers 4, bend pulleys 3, etc., and the work environment around the conveyor belt 12 will be affected. In this embodiment, the following measures are taken to prevent dust from scattering.

A water sprinkling nozzle 6 serving as water sprinkling means is disposed between the first snub pulley 2a and the second snub pulley 2b. As shown in the figure, the water nozzle 6 is connected to a pump 11 via a solenoid valve 8, a flow meter 9, and a flow rate adjustment valve 10. If the solenoid valve 8 is turned on at an appropriate timing after adjusting the flow rate adjustment valve 10, a predetermined amount of water is sprinkled onto the powder on the return conveyor belt 12. The sprayed water is thinly spread over the entire surface of the conveyor belt 12 by the second snub pulley 2b, which is placed downstream of the water spray nozzle 6 and acts as a pressing roller, to wet the entire powder. The amount of water sprinkled from the water sprinkling nozzle 6 is preferably controlled by the flow rate adjustment valve 10 as follows, that is, from the time when the return side conveyor belt 12 leaves the sprinkling position by the water sprinkling nozzle 6 until it reaches the ore supply position P. The amount of water is controlled to such an extent that the water on the conveyor belt 12 dries before it finishes passing through the tail pulley 5.

The flow meter 9 is for checking the flow rate of water during water flow control.

As described above, in this embodiment, the return side conveyor belt 12
When the powder remaining on the top comes into contact with ancillary members such as the return roller 4 or the bend pulley 3, since the powder has moisture, it is prevented from becoming dust and scattering. Further, the moisture in the powder dries up before it reaches the ore supply position P as the conveyor belt 12 moves, so there is no inconvenience of wetting the newly supplied ore, and there is no problem with water spraying. Since a large amount of water is not sprayed by the nozzle 6, water distribution equipment, post-treatment equipment, etc. are not required, which is economical.

FIG. 2 shows another embodiment. This embodiment differs from the embodiment shown in FIG. and a second belt reversing section 25 is provided. Furthermore, the snub pulley on the head pulley 1 side is designated by the symbol 2a.
, 2b, 2c, and 2d are due to differences in the belt drive method and belt tension control method, and are not essential changes to perform a special function.

The first belt reversing unit 24 turns the front and back sides of the conveyor belt 12 so that the belt surface on which powder is present is directed from the lower side to the upper side, thereby preventing ore from falling from the belt and dust from scattering. It is something. The second belt reversing section 25 reverses the conveyor belt 12 that has been reversed by the first belt reversing section 24 to return it to its original state.

In this embodiment, the water spray nozzle 6 is disposed between the first snub pulley IJ 2a and the second snub pulley 2b, the second snub pulley 2b acts as a pressing roller, and the water spray nozzle 6 is a solenoid valve. 8. The flow meter 9 and the connection to the pump 11 via the flow adjustment valve 10 are the same as in the embodiment shown in FIG. The difference is that the amount of water sprayed from the water nozzle 6 is
The return side conveyor belt 12 is controlled by the adjusting valve 10.
The amount of water is adjusted to such an extent that the water on the belt dries between the time the belt leaves the water sprinkling position and the time it finishes passing through the first belt reversing section 24.

On the other hand, another water spray nozzle 26 is provided at an upstream position of the second belt reversing section 25 (right side position in the figure). The pump 11 and the like attached to this water spray nozzle 26 are the same as those of the previous water spray nozzle 6. The amount of water sprayed from the water sprinkling nozzle 26 is determined by the amount of water on the return conveyor belt 12 from when it leaves the sprinkling position by the water sprinkling nozzle 26 until it reaches the ore supply position P, for example, until it finishes passing through the tail pulley 5. The amount of water is controlled to the extent that it dries.

The above configuration prevents dust from scattering while the conveyor belt 12 is being reversed in the first belt reversing section 24 and the second belt reversing section 25. Between the two belt inversion parts, the belt is reversed and the powder carrying surface is on the upper side, that is, on the side that does not come into contact with the return roller 4, etc., so there is no scattering of dust.

When the amount of dust scattered in this example was measured, the amount of suspended dust inside the conveyor building was stable at less than 0.5 square feet, and the working environment was significantly improved. Incidentally, when a conventional dust collection method using a coating material was carried out, the amount of suspended dust was as high as 1 to 6 square meters per liter.

FIG. 3 is a view of the water spray nozzle 26 disposed upstream of the second reversing section 25, viewed from above, according to the arrow {circle around (2)} in FIG. FIG. 4 is a side view taken in the direction indicated by the arrow ``■'' in FIG. 3, and FIG. 5 is a front view taken in the direction indicated by the arrow ``■'' in FIG. In these figures, the water spray nozzle 26 is fixed to the guide pipe 21. The guide pipe 21 is provided with guide rollers 22 hanging downward at both ends thereof, and the machine frame 19.1
It is slidable along a shaft 22 which is fixedly disposed at 9. The guide rollers 22 are arranged close to or in slight contact with both ends of the conveyor belt 12. During its operation, the conveyor belt 12 may meander in the direction BB' in FIG. 3 or FIG. 5. When the conveyor belt 12 meanders in either direction, its end pushes one of the corresponding guide rollers 22 toward the machine frame 19, thereby causing the guide pipe 21 and hence the water nozzle 26 to move in the direction in which the conveyor belt 12 meanders. It travels approximately the same distance as the meandering distance. As a result, even if the conveyor belt 12 meanderes, the position of the water spray nozzle 26 relative to the conveyor belt 12 is always maintained at a constant position, preferably at the center position of the conveyor belt 12. Therefore,
Uniform watering can always be performed regardless of the meandering of the conveyor belt 12.

In addition, in FIGS. 3 and 4, the reference numeral 27 is a hose.

Of course, if there is no concern that the conveyor belt 12 will meander, the water spray nozzles 26 can be fixedly arranged.

According to the inventions set forth in Claims 1 to 4, the fine particle size powder that causes dust on the surface of the return conveyor belt is moistened, so that dust scattering is prevented.

This reduced the amount of accumulated dust and made cleaning the accumulated dust much easier. Moreover, since the conveyor belt is dried before returning to the conveyance object supplying position, the newly supplied conveyance object is not unnecessarily moistened. Furthermore.

Since large amounts of water are not discharged, there is no need for large amounts of water distribution equipment.

According to the third aspect of the invention, it is possible to reliably prevent dust from scattering even in a system using a long-distance conveyor belt.

According to the invention of claim 5, even when the conveyor belt meanderes, scattering of dust can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of one embodiment, FIG. 2 is a schematic side view of another embodiment, and FIG. 3 is a plan view taken along the arrow ■ in FIG.
Figure 4 is a side view taken along the arrow ■ in Figure 3, and Figure 5 is a side view of the
FIG. 6 is a front view taken along the arrow ① in the figure, and a side view of the main part of the conventional example. 12...Conveyor belt. P... Feeding device for the transported object, 6.26... Water nozzle (water spraying means) 2b... Snub pulley (pressing roller) 7... Pressing roller... Head pulley, 5... Tail pulley 24...
...First belt reversal section 25...Second belt reversal section

Claims (5)

[Claims] (1) A method for preventing dust scattering in a belt conveyor transportation system in which a transported object containing powder is supplied onto a moving conveyor belt and the transported object is transported by the moving conveyor belt, the method comprising: After transportation, the surface of the return conveyor belt is sprayed with water to the extent that the surface of the conveyor belt dries while the conveyor belt returns to the supply position of the transported object. A dust scattering prevention method characterized by uniform wetting. (2) The above-mentioned conveyor belt is supported by two pulleys, a head pulley and a tail pulley, and the transported material is supplied from the tail pulley side and transported to the head pulley side, where it is moistened by water spraying. 2. The dust scattering prevention method according to claim 1, wherein the surface of the returning conveyor belt is dried before reaching the tail pulley. (3) The conveyor belt is supported by two pulleys, a head pulley and a tail pulley, and on the return side of the conveyor belt from the head pulley to the tail pulley, there is a first belt reversing part that reverses the front and back of the conveyor belt, and once the conveyor belt is reversed. A second belt reversing section is provided for reversing the conveyor belt back to its original state, and the surface of the returning conveyor belt, which has been moistened by water sprinkling on the head pulley side, dries after passing through the first belt reversing section. 2. The dust dust according to claim 1, further comprising: after the first reversing section, the surface of the return conveyor belt is again moistened by water spraying, and the surface of the conveyor belt is dried before reaching the conveyed material supply position. How to prevent scattering. (4) In a dust scattering prevention device in a belt conveyor transportation system that supplies a transported object containing powder onto a moving conveyor belt and transports the transported object by the moving conveyor belt, the conveyor belt on the return side a water sprinkling means disposed opposite to the conveyor belt for sprinkling water on the conveyor belt; and a water sprinkling means disposed downstream of the water sprinkling means for uniformly spreading the water sprinkled onto the conveyor belt by the water sprinkling means over the surface of the conveyor belt. a pressing roller and a water amount adjustment for controlling the amount of water sprinkled from the water spraying means so that the surface of the return side conveyor belt that has been sprayed with water is dry before reaching the supply position of the transported object; A dust scattering prevention device characterized by having means and. (5) The dust scattering prevention device according to claim 4, wherein the water sprinkling means moves in the width direction of the conveyor belt according to the meandering of the conveyor belt.