JPH08168693A - Fine aggregate washer - Google Patents

Abstract

PURPOSE: To prevent fine aggregate from being mixed with the muddy water being carried off with a belt, when, for example, the fine aggregate such as sand is taken out from a water tank by a belt conveyor device. CONSTITUTION: A belt cleaner 14 is provided immediately below a belt support roller 13 on the unloading end of a belt conveyor device 12 for carrying out the fine aggregate washed in a water tank 11 in order to wipe off the mud and muddy water passing around behind the belt support roller 13 on a belt 15 and a muddy water discharging means 17 is provided immediately below the cleaner 14, whereby the mud and muddy water falling vertically and downwardly in drops along the cleaner 14 are received by a trough 18 and discharged through a water discharging pipe 19. At that time, the trough 18 is normally supplied with cleaning water by a water feed means in order to prevent a discharging passage from being clogged with the mud and muddy water flowing down into the trough 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine aggregate cleaning apparatus,
More specifically, when the fine aggregate used in the production of concrete is placed in a water tank and mud or dust adhering to it is removed and then taken out by a belt conveyor device, mixing of muddy water and fine aggregate is prevented. The present invention relates to a fine aggregate cleaning device.

[0002]

Sand is generally used as a fine aggregate used in the production of concrete. After the sand is collected, it is washed by a washing device, and the attached mud and dust are washed off.

A conventional fine aggregate washing machine for washing the sand used as the fine aggregate is schematically shown in FIG. The conventional fine aggregate washing machine 1 is configured such that one end 2a located below the inclined belt conveyor device 2 is arranged in the water tank 3. A slight vibration is applied to a part of the water tank 3 by a vibrating device (not shown), and this vibration is also transmitted to the water in the water tank 3 so that sand is continuously introduced into the water tank 3 from above (arrow 4). Was performed).

The sand put into the water tank 3 is washed while falling in the vibrating water and drops on the belt 5 of the belt conveyor device 2 located immediately below it. The belt conveyor device 2 is continuously operated, and the sand on the belt 5 is successively carried out of the water tank 3 as the belt 5 moves.

The sand carried out from the water tank 3 by riding on the belt 5 of the belt conveyor device 2 as described above passes through the hopper-shaped chute 6 from the other end 2b of the belt conveyor device 2 located on the upper side to the bottom thereof. It falls on the belt of the transfer conveyor device 7 installed at. The washed sand is transported to a sand jar for storage for concrete production.

[0006]

However, the conventional fine aggregate cleaning apparatus 1 of this type has the following problems. That is, in the conventional fine aggregate cleaning apparatus 1, since the belt 5 of the belt conveyor device 2 that carries the washed sand out of the water tank 3 passes through the water tank 3, the inside of the water tank 3 is soiled together with the washed sand. Water is also carried out.

When the sand drops from the other end 2b of the belt conveyor device 2 through the hopper-shaped chute 6 onto the belt of the transfer conveyor device 7, the muddy water on the belt 5 also drops and the muddy water also forms sand. Carried to the bin. Therefore, mud eventually mixes with the washed sand, and if such sand is used as it is for the production of concrete, it may lead to various inconveniences, such as deterioration of the quality of the concrete and the inability to ensure the prescribed strength. The improvement was desired.

The object of the present invention is to solve the above-mentioned conventional problems, and when the washed fine aggregate such as sand is taken out from the water tank by the belt conveyor device and conveyed to the next step, the belt conveyor is used. It is an object of the present invention to provide a fine aggregate cleaning device that prevents mixing of muddy water taken out together with the belt of the device with fine aggregate.

[0009]

The present invention is a fine aggregate cleaning apparatus, which is configured as follows in order to solve the above-mentioned technical problems. That is, the present invention is a fine aggregate cleaning apparatus 10 for cleaning fine aggregate used in the production of concrete, which comprises a water tank 11 for cleaning fine aggregate, and the fine aggregate washed in this water tank 11. The belt conveyor device 12 carried out from the inside of the water tank, and the mud attached to the conveyor belt 15 installed directly below the carry-out side belt support roller 13 in the belt conveyor device 12 and having the belt support roller 13 wrapped around it. A belt cleaner 14 for wiping off muddy water, a muddy water discharging means 17 disposed directly below the belt cleaner 14 for receiving and discharging mud and muddy water which are transmitted to the belt cleaner 14 and drip vertically downward, and the muddy water discharging means 17 In order to prevent clogging of the discharge passage due to mud and muddy water flowing down to the muddy water, the muddy water discharging means 17 is constantly supplied with water for washing. Water supply means 20
It is composed of and. The components of the present invention will be individually described below.

(Water tank) Still water is stored in the water tank 11, and the sand, which is a fine aggregate, is washed with this still water. The clay-like mud, or sludge, that adheres to the sand is relatively soluble in water and can be removed to some extent by dropping the sand into the water, but a slight vibration is applied to a part of the aquarium to further enhance the cleaning level. This can be transmitted to water, and the micro-vibration can be used to enhance the effect of removing sludge adhering to the sand.

(Belt Conveyor Device) The belt conveyor device 12 is installed so as to be inclined, one end 12b of which is submerged and positioned in the water tank, and the other end 12a of which is positioned above the water surface in the water tank 11. The belt portion of the belt conveyor device 12 submerged in the water tank is located immediately below the fine aggregate inlet 11a of the water tank.

(Belt cleaner) Belt cleaner 1
4 is installed directly below the carry-out side belt support roller 13 in the belt conveyor device 12. The belt cleaner 14 is preferably composed of a wear-resistant cemented carbide blade 14a extending in the width direction of the conveyor belt 15 and a cushioning support member 14b for supporting the blade 14a. The blade 14a is a conveyor. Belt 15
The surface is lightly brought into contact with the surface to wipe off mud and the like adhering to the conveyor belt 15.

(Muddy Water Discharging Means) A muddy water discharging means 17 installed directly below the belt cleaner 14 has a trough 18 extending in the width direction of the conveyor belt 15 and one end of this gutter 18 like the belt cleaner 14. And a drainage pipe 19 connected to the. That is, the muddy water discharging means 17 is a passage for receiving and discharging the mud and muddy water which are transmitted through the belt cleaner 14 and dripping. This gutter 18
The discharge pipe 19 and the discharge pipe 19 are preferably made of resin, metal or the like, but it is not necessary to limit the forming material in view of the application.

(Water Supply Means) The water supply means 20 for supplying water to the muddy water discharge means 17 may be constructed such that water stored in a tank or the like is pumped to the muddy water discharge means by a water supply pipe 20a using a pump or the like. it can. Of course, the water supply source and the pressure feeding means are not limited, and a gravity water supply method using a head may be used, for example.

[0015]

According to the fine aggregate cleaning apparatus of the present invention, the fine aggregate such as sand, which is put into the water tank 11, sinks by removing the mud and dust adhering in the water, and the conveyor belt 1
Get on 5. The sand successively charged into the water tank 11 is successively carried out of the water in the water tank 11 by the conveyor belt 15 which is continuously moving. At that time, the dirty water in the water tank 11, that is, the muddy water is also carried by the conveyor belt 15. Come out.

At the carry-out end of the belt conveyor device 12, the mud and muddy water on the conveyor belt 15 are removed by the belt 15.
At the same time, the belt cleaner 14 is wiped off around the belt support roller 13 and drips down along the belt cleaner 14, but the fine aggregate is discharged farther than that due to the inertia due to the conveying movement.

The fine aggregate discharged to a distance from the carry-out end of the belt conveyor device 12 is placed on another conveyor device 22 or the like by a suitable hopper-shaped chute 21. On the other hand, the mud or muddy water that has dripping down through the belt cleaner 14 is received by the muddy water discharge means 17 arranged directly below it.

If the concentration of the mud and the muddy water that has flowed down to the muddy water discharge means 17 is high, it is difficult for the water contained in the mud and muddy water to flow, and there is a risk that the discharge passage will be clogged. Therefore, the muddy water discharge means 17 is provided by the water supply means 20.
Is constantly supplied with water for washing to dilute the mud and muddy water that have flowed down to the muddy water discharge means 17 to enhance its fluidity.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The fine aggregate cleaning apparatus of the present invention will now be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 schematically shows a fine aggregate cleaning apparatus 10 according to an embodiment of the present invention. The fine aggregate cleaning device 10 is used for cleaning sand mixed in during concrete production, and is roughly classified into a water tank 11 and a belt conveyor device 12.
The belt cleaner 14, the muddy water discharge means 17, and the water supply means 20.

The water tank 11 is for washing fine aggregate, and is the same as the conventional one in itself. Still water is stored in the water tank 11, and a vibration generating device ( Vibration (not shown) can be applied to the water tank 11 and the belt conveyor device 12. The reason for installing such a vibration generator is that clay-like mud adhered to sand, that is, sludge, is relatively soluble in water, so it can be removed to some extent by dropping the sand into the water, but the degree of cleaning is increased. For aquarium 11
This is to give a slight vibration to the water in the water tank through the belt conveyor device 12 or the belt conveyor device 12 to increase the effect of removing sludge adhering to the sand.

The water tank 11 includes a belt conveyor device 1
2 is installed so as to be inclined so that the carry-in side end 12b, which is one end thereof, is positioned in the water tank 11, and the other end 12a that is the carry-out side is positioned above the water surface, that is, above the water tank 11. A fine aggregate inlet 11a is formed on the top plate of the water tank 11 directly above the belt portion of the belt conveyor device 12 submerged in the water tank 11.

A belt cleaner 14 is provided directly below the belt support roller 13 on the unloading side of the belt conveyor device 12.
Is installed. This belt cleaner 14 is shown in FIG.
As shown in FIG. 3, the belt is extended in the width direction of the conveyor belt 15 and is made of wear-resistant cemented carbide for lightly sliding contact with the surface of the belt 15 to wipe off mud and the like adhering to the conveyor belt 15. It is composed of a blade 14a and a cushioning support member 14b supporting the blade and having a triangular cross section. Such a belt cleaner 14 is firmly attached and supported by a bar member 16 bridging in the width direction of the conveyor belt 15.

Immediately below the belt cleaner 14, as shown in FIGS. 2 and 3, there is installed a muddy water discharging means 17 for receiving and discharging mud and muddy water which are transmitted and drips vertically downward. This muddy water discharge means 17
Similar to the belt cleaner 14, the conveyor belt 15 includes a gutter 18 extending in the width direction and having a U-shaped cross section, and a drain pipe 19 connected to one end 18 a of the gutter 18.

That is, the muddy water discharging means 17 is a passage for receiving and discharging the mud and muddy water which are dripping down the belt cleaner 14. This gutter 18 and drain pipe 19
Can be made of resin or metal.

A water supply means 20 for constantly supplying washing water to the muddy water discharge means 17 in order to prevent clogging of the passage due to mud and muddy water flowing down the gutter 18 and the drainage pipe 19.
Is connected. This water supply means 20 for supplying water to the muddy water discharge means 17 is specifically, for example, a pump (not shown) for using water stored in a tank (not shown) or the like.
At the other end 18 of the gutter 18 with the water supply pipe 20a as shown in FIG.
It is configured to supply water to b. In FIG. 4, reference numeral 20b indicates a valve attached to the water supply pipe 20a.

The water supply source and the pressure feeding means in the water supply means 20 are not particularly limited, and may be, for example, a water supply method by the dead weight utilizing a head. next,
The operation of the fine aggregate cleaning device 10 in the above-described embodiment will be described. Fine aggregate inlet 11a in the upper part of the water tank 11
The fine aggregate such as sand, which has been put in from the above, is washed by removing the mud and dust adhering to it in the water and settles down, and then rides on the conveyor belt 15. The sand successively charged into the water tank 11 is successively carried out of the water in the water tank 11 by the conveyor belt 15 which is continuously moving. At that time, the dirty water in the water tank 11, that is, the muddy water is also carried by the conveyor belt 15. Come out.

At the carry-out end of the belt conveyor device 12, the mud and muddy water on the conveyor belt 15 are removed by the belt 15.
Along with the belt support roller 13, the belt cleaner 14 wipes the belt support roller 13, and the belt cleaner 14 travels through the belt cleaner 14 and drops. However, the fine aggregate is
As shown in (1), it is emitted farther than that due to the inertia due to its transporting motion.

The fine aggregate discharged a little further from the carry-out end of the belt conveyor device 12 is placed on another transfer conveyor device 22 by a suitable hopper-shaped chute 21.
On the other hand, the mud and muddy water that have dripping down through the belt cleaner 14 are gutters 1 of the muddy water discharging means 17 arranged directly below the muddy water.
Falls within 8.

If the concentration of the mud and muddy water that has flowed down into the gutter 18 is high, it is difficult for the water contained in the mud and muddy water to flow, and there is a risk that the discharge passage will be clogged. Therefore,
It is possible to constantly supply water for cleaning to the gutter 18 by the water supply means 20 to dilute the mud and the muddy water that have flowed down to the gutter 18 and the drainage pipe 19 so that the fluidity thereof can be enhanced and the mud and the muddy water can be completely discharged. it can.

[0030]

As described above, according to the fine aggregate washing apparatus of the present invention, the washed fine aggregate such as sand is taken out from the water tank for washing fine aggregate by the belt conveyor and conveyed to the next step. When doing so, it is possible to reliably prevent the mixture of mud and muddy water taken out by the belt of the belt conveyor device with fine aggregate, and it is possible to supply fine aggregate that does not contain dust or mud. .

[Brief description of drawings]

FIG. 1 is a structural explanatory view schematically showing a fine aggregate cleaning device according to an embodiment of the present invention.

FIG. 2 is an end view of the belt conveyor device showing a muddy water discharging unit installed at an end of a belt conveyor device constituting the fine aggregate cleaning device shown in FIG.

FIG. 3 is a cross-sectional view schematically showing a belt cleaner and muddy water discharging means installed at an end portion on the carry-out side of the belt conveyor device, taken along line 3-3 in FIG.

FIG. 4 is a plan view partially showing the water supply means connected to the gutter of the muddy water discharge means shown in FIG.

FIG. 5 is a structural explanatory view schematically showing a conventional fine aggregate cleaning device.

[Explanation of symbols]

 10 Fine Aggregate Cleaning Device 11 Water Tank 11a Fine Aggregate Inlet 12 Belt Conveyor Device 12a Belt Carry Out Side End 12b Belt Conveyor Carry In Side End 13 Belt Support Roller 14 Belt Cleaner 14a Blade 14b Cushion Support Member 15 Conveyor Belt 16 Bar 17 Muddy Water Discharging Means 18 Gutter 18a Gutter One End 18b Gutter Other End 19 Drain Pipe 20 Water Supply Means 20a Water Supply Pipe 21 Chute 22 Conveyor Conveyor Device

Claims (1)

[Claims] 1. A fine aggregate washing apparatus for washing fine aggregate used in the production of concrete, comprising a water tank for washing the fine aggregate, and carrying out the fine aggregate washed in the water tank from the inside of the water tank. A belt conveyor device, and a belt cleaner installed directly below the unloading-side belt support roller in the belt conveyor device, which wipes off mud and muddy water adhering to the conveyor belt that wraps around the belt support roller, and It is located just below the belt cleaner,
A muddy water discharge means that receives and discharges mud and muddy water that vertically travels down the belt cleaner and discharges the muddy water and muddy water that flows into the muddy water discharge means. And a water supply means for supplying the above water.