JPH10329131A - Coarse aggregate cooling facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently cool a coarse aggregate by sending an air flow from an air feed device to the inner bottom part of a storage tank from the air blow aperture of an air blow duct and circulating the air flow through a void between individual coarse aggregates stored in the storage tank. SOLUTION: The coarse aggregate cooling facilities comprise a storage tank 7 which has a gate 11 at the bottom part and stores a coarse aggregate internally, an air blow duct 21 which is arranged an inner bottom part of the storage tank 7 and has an air blow aperture 26, an air feed device 38 which feeds an air flow at a low temperature or a low humidity to the air blow duct 21 and many lumpy materials 40 which cover the whole air blow duct 21 and are piled up at the inner lower part of the storage tank 7 in such a manner that their stacked elevation becomes gradually lower toward the gate 11. In this case, the air flow at a low temperature or a low humidity originating from the air feed device 38 is sent to the inner bottom part of the storage tank 7 from the air blow aperture of the air blow duct 21 and further is circulated into a void between the coarse aggregates stored in the storage tank 7 from a void between the lumpy materials piled up in the storage tank 7. Thus the coarse aggregate is cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for cooling coarse aggregate.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a ready-mixed concrete production facility, wherein 1 is a batcher plant and 2 is a stockyard.

[0003] The batcher plant 1 includes cement, water, fine aggregate (sand), coarse aggregate (gravel), which are raw materials of ready-mixed concrete, and an admixture for improving properties such as fluidity of ready-mixed concrete. And the raw materials are kneaded by a mixer to produce ready-mixed concrete.

[0004] The stock yard 2 stores sand 3 and gravel 4 as raw materials of ready-mixed concrete, and the sand 3 and gravel 4 are supplied to the batcher plant 1 by conveyors 5 and 6 such as belt conveyors. It has become.

[0005] The ready-mixed concrete produced in the above-mentioned batcher plant 1 is conveyed to a casting site by various conveying means. However, when constructing a large-scale concrete structure, the concrete is accompanied by heat of hydration of cement. Large concrete temperature changes occur in the concrete after casting.
There is a concern that cracks due to temperature changes may occur and affect the function and durability of the concrete structure.

Therefore, sand 3 and gravel 4, which are supplied to the batcher plant 1 as raw material of ready-mixed concrete,
Cement, water, etc. are cooled before kneading work,
Pre-cooling has been carried out to suppress a rise in temperature during mixing of ready-mixed concrete.

Hitherto, the following aggregate cooling means has been applied to pre-cooling of aggregate. (1) Cold water cooling in which cold water is sprinkled on the aggregate or the aggregate is immersed in the cold water. (2) Liquid nitrogen cooling for cooling aggregate using cryogenic liquid nitrogen. (3) Vacuum cooling using the heat of vaporization of water attached to the aggregate by reducing the pressure in the container filled with the aggregate to lower the boiling point of water to about room temperature.

[0008]

However, the following problems have been pointed out in the above-mentioned aggregate cooling means. (1) In chilled water cooling, large-scale cooling plants,
Large capacity auxiliary equipment (water supply and drainage equipment, turbid water treatment equipment, dehydration treatment equipment) is required. (2) In liquid nitrogen cooling, the running cost is high, the handling of high-pressure and extremely low-temperature liquid nitrogen is not easy, and the loss during cooling is large. (3) Further, in vacuum cooling, it is difficult to uniformly cool the aggregate, the initial cost of the equipment is high, and it is difficult to manage the surface water of the aggregate.

The present invention has been made in view of the above circumstances, and has as its object to provide a coarse aggregate cooling facility capable of efficiently cooling coarse aggregate as a raw material of ready-mixed concrete.

[0010]

In order to achieve the above object, a coarse aggregate cooling system according to claim 1 of the present invention comprises:
A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air supply device for supplying an air flow to the ventilation duct And

According to a second aspect of the present invention, there is provided a coarse aggregate cooling facility having a gate at the bottom and capable of storing coarse aggregate therein, and a blower disposed at an inner bottom portion of the storage tank and having a blower. A blower duct having an opening, an air supply device for supplying an airflow to the blower duct, and a block stacked on the lower inside of the storage tank so as to cover the entire blower duct and form a space toward the gate. Have.

According to a third aspect of the present invention, there is provided a coarse aggregate cooling facility having a gate at the bottom and capable of storing the coarse aggregate therein, and an air blower disposed at the inner bottom of the storage tank. A blower duct having an opening, an air supply device for supplying an air flow to the blower duct, and a stacking device that covers the entire blower duct and that is stacked at an inner lower portion of the storage tank so that the stacking height gradually decreases toward the gate. Lumps.

According to a fourth aspect of the present invention, there is provided a coarse aggregate cooling facility in addition to the above-described configuration of the coarse aggregate cooling facility according to any one of the second and third aspects of the present invention. Is provided from the upper side and a fall prevention member is provided for preventing the collapse of the lump while ensuring air permeability from the inner bottom to the upper part of the storage tank.

According to a fifth aspect of the present invention, there is provided a coarse aggregate cooling system having a gate at the bottom and capable of storing coarse aggregate therein, and a blower disposed at the inner bottom of the storage tank and having an air blower. A blower duct having an opening, an air supply device for supplying an airflow to the blower duct, and air permeability provided in an inner lower portion of the storage tank so as to cover the entire blower duct and form a space facing a gate. And a partition plate.

According to a sixth aspect of the present invention, there is provided a coarse aggregate cooling facility having a gate at the bottom and capable of storing the coarse aggregate therein, and a blower disposed at the inner bottom of the storage tank and having a blower. A blower duct having an opening, an air supply device for supplying an airflow to the blower duct, and an inner lower part of the storage tank provided so as to cover the entire blower duct and form a downward slope facing the gate. A partition plate having air permeability.

According to a seventh aspect of the present invention, there is provided a coarse aggregate cooling facility, in addition to the configuration of the coarse aggregate cooling facility according to any one of the first to sixth aspects of the present invention. An apparatus for supplying a low-temperature or low-humidity air flow to a ventilation duct is used.

The coarse aggregate cooling equipment according to claim 8 of the present invention has a storage tank in addition to the structure of the coarse aggregate cooling equipment according to any one of claims 1 to 7 of the present invention. A sprinkler tube for spraying water into the storage tank.

According to a ninth aspect of the present invention, in addition to the structure of the coarse aggregate cooling facility according to any one of the first to eighth aspects of the present invention, a storage tank is provided. A water reservoir is formed in the inner bottom portion of the container, and a drain pipe is connected to the water reservoir.

In the coarse aggregate cooling facility according to the first aspect of the present invention, the air flow from the air supply device is sent from the air outlet of the air duct to the inner bottom of the storage tank, and stored in the storage tank. The coarse aggregate is cooled by flowing an air flow through the gaps between the coarse aggregates.

[0020] In any of the coarse aggregate cooling equipment according to the second and third aspects of the present invention, the air flow from the air supply device is supplied to the inner bottom portion of the storage tank from the ventilation port of the ventilation duct. By distributing the air flow through the gaps between the lump-up bodies stacked in the lower part of the inside of the storage tank, the air flow is dispersed, and a gap is formed between the coarse aggregates stored in the storage tank. The coarse aggregate is cooled by evenly circulating the air flow.

In the coarse aggregate cooling device according to the fourth aspect of the present invention, the collapse prevention member prevents the mass from falling inside the storage tank, and prevents the gate from being damaged or blocked by the mass falling.

In any one of the fifth and sixth aspects of the present invention, the air flow from the air supply device is supplied to the fixed portion of the storage tank from the air outlet of the air duct. By distributing the air flow through the air-permeable partition plate, the air flow is dispersed, and the air flow is evenly distributed between the coarse aggregates stored in the storage tank to cool the coarse aggregate. I do.

In the coarse aggregate cooling system according to the present invention, the low-temperature or low-humidity air flow from the air supply device is supplied to the gap between the coarse aggregates stored in the storage tank. It is distributed to promote the cooling of the coarse aggregate.

[0024] In the coarse aggregate cooling device according to the present invention, water is sprayed from the sprinkler pipe into the storage tank to impart moisture to the surface of the coarse aggregate stored in the storage tank. The cooling of the coarse aggregate is promoted by the latent heat of vaporization when the moisture on the surface of the coarse aggregate is vaporized by the air flow passing through the gap between the coarse aggregates.

In the coarse aggregate cooling system according to the ninth aspect of the present invention, a surplus of water sprayed from the sprinkler pipe to the coarse aggregate inside the storage tank is stored in the storage tank through the drain pipe through the drain pipe. To prevent water from flowing down from the gate.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show a first embodiment of a coarse aggregate cooling system according to the present invention. This coarse aggregate cooling system stores coarse aggregate inside and has a bottom portion. A storage tank 7 having a gate 11 for cutting coarse aggregate downward, a ventilation duct 21 disposed at the inner bottom of the storage tank 7, and a low-temperature or low-humidity air flow supplied to the ventilation duct 21. It is composed of an air supply device 38 and a large number of masses 40 stacked on the lower inside of the storage tank 7 so as to cover the entire air duct 21 and form a space facing the gate 11.

The storage tank 7 includes a cylindrical body 9 erected on the upper surface of the base 8, a chute 10 located inside the body 9 and penetrating the base 8, And a gate 11 provided at a lower end of the gate.

The gantry 12 provided at the upper end of the body 9 has
A head end of a belt conveyor 13 for carrying coarse aggregate into the storage tank 7 and a sprinkling pipe 15 to which a nozzle 14 is attached are supported. When water is supplied to the sprinkling pipe 15, the inside of the storage tank 7 Water is sprayed on the coarse aggregate.

A lock ladder (not shown) for dispersing coarse aggregate falling from the belt conveyor 13 is provided inside the storage tank 7 as needed.

A water reservoir 16 extending along the inner surface of the body 9 is formed on the upper surface of the base 8 forming the inner bottom of the storage tank 7.

A drain pipe 17 penetrating through the base plate 8 is connected to the bottom of the water reservoir 16, and water flowing into the water reservoir 16 (excess water sprayed from the nozzle 14 to the coarse aggregate). Is discharged out of the storage tank 7 through the drain pipe 17.

The gate 11 is pivotally supported by the chute 10 so as to be rotatable between a closed position at which the lower end of the chute 10 is closed and an open position at which the lower end of the chute 10 is released. An opening / closing cylinder 19 for rotating the gate body 18 to a closed position or an open position.

Further, a belt conveyor 20 is disposed below the base plate 8 so as to be located immediately below the chute 10. When the gate body 18 is rotated to the open position, the belt conveyor 20 is moved from the storage tank 7. The cut coarse aggregate is carried out by the belt conveyor 20 to the batcher plant 1 (see FIG. 7) for producing ready-mixed concrete.

The air duct 21 is connected to the storage tank 7 from outside.
An introduction portion 22 penetrating the body portion 9 substantially horizontally between the two chutes 10, and a first portion arranged on one side of the two chutes 10 and extending substantially horizontally in a direction intersecting the introduction portions 22. A blower 23, a second blower 24 disposed between the two chutes 10 and extending substantially coaxially with the introduction unit 22, and a first blower disposed on the other side of the two chutes 10;
And a third blower section 25 extending in parallel to the blower section of each of the blower sections.
An air outlet 26 is provided.

The entire introduction section 22, an intermediate portion of the first blowing section 23, both end sections of the second blowing section 24, the third blowing section 2
5 is formed in a tubular shape extending coaxially, one end of the leading end of the introduction part 22 and one side of the middle part of the first blower 23,
The other side of the intermediate portion of the first blower 23 and the second blower 24
, The distal end of the second blower 24 and one side of the third blower 25 are flanged to each other.

On the other side of the intermediate portion of the third blower 25, a closing plate 27 is attached.

A pair of lower right and left lower longitudinal beams 28 made of channel members fixed parallel to each other on the upper surface of the base plate 8 are formed on both side portions connected to the intermediate portion between the first blowing portion 23 and the third blowing portion.
A plurality of columns 29 formed of a channel material which is erected at predetermined intervals in the longitudinal direction of the lower longitudinal beam 28 and whose lower end is fixed to the upper surface of the lower longitudinal beam 28; Through beam 2
8 and a pair of left and right upper longitudinal beams 30 each formed of a channel member having a lower surface fixed to the upper end of a column 29 at a predetermined interval in the longitudinal direction of the lower longitudinal beams 28. A lower cross beam 31 made of a channel material and disposed at both ends in the longitudinal direction of the left and right lower longitudinal beams 28 and fixed at predetermined intervals in the longitudinal direction of the upper longitudinal beam 30. An upper cross beam 32 made of a tubular material and fixed at both ends to a longitudinal middle portion of the left and right upper vertical beams 30 and a half-tubular shape having a convex curved surface facing upward and having both side edges as described above. An upper covering member 33 fixed to the upper surface of the upper longitudinal beam 30; a lower end beam 34 made of a channel material having both ends secured to the tip of the lower longitudinal beam 28; The ends of the space surrounded by the longitudinal beam 30 and the upper covering member 33 are And a lower stringer beams 28, the upper stringer beams 30, closure plate 35 secured to the respective end and the lower end beam 34 of the upper covering members 33 so as to partition Te.

A plurality of air conditioning plates 36 are provided between the columns 29 in which the air outlets 26 are formed, outwardly from a space surrounded by the lower vertical beam 28, the upper vertical beam 30, and the upper covering member 33. The air conditioner 36 is fixed to the support 29 at both ends thereof so as to have a downward inclination and is arranged substantially horizontally at a predetermined interval in the vertical direction.

A blocking plate 37 is disposed between the columns 29 not forming the air vent 26 so as to close the opening formed by the lower vertical beam 28, the upper vertical beam 30, and the column 29. The closing plate 37 is fixed to the lower longitudinal beam 28, the upper longitudinal beam 30, and the column 29.

The proximal structure of the intermediate portion of the second blower 24 is also configured in the same manner as the first blower 23 and the third blower 25 on both sides.

The air supply device 38 is arranged outside the storage tank 7.

The air discharge port of the air supply device 38 has
The base end of the introduction portion 22 of the above-described air duct 21 is connected via an air volume adjusting means (damper) 39, and when the air supply device 38 is operated, the low-temperature or low-humidity air flow is blown. The air flows out of the air inlet 26 through the duct 21 into the storage tank 7.

The mass 40 is piled up in the lower part of the inside of the storage tank 7 so as to cover the entire ventilation duct 21 and to gradually lower the pile height toward the gate 11 at an angle smaller than the angle of repose. The coarse aggregate carried into the storage tank 7 by the belt conveyor 13 described above is stored above the block 40, and a space for the coarse aggregate to move toward the gate 11 is secured. I have.

The above-mentioned aggregates 40 are made of a cobblestone having a shape larger than that of the coarse aggregate to be stored in the storage tank 7 so that voids are formed between the piles of the aggregates 40. However, when the shape of the coarse aggregate stored in the storage tank 7 is relatively large, the coarse aggregate is
The mass 40 may be piled up so that the upper portion becomes substantially flat if a space for moving the coarse aggregate toward the gate 11 is secured.

The inside of the storage tank 7 covers the stacked bodies 40 stacked as described above from above, and maintains the air permeability from the inner bottom to the upper part of the storage tank 7 while maintaining the air permeability.
A collapsing prevention member 41 for preventing collapsing is provided as necessary.

As the collapse preventing member 41, a net-like body formed by a steel cable so that the opening portion is smaller than the shape of each lump 40, or a basket body formed by assembling steel strips is used.

When cooling the coarse aggregate in the production of ready-mixed concrete, the air supply device 38 is operated, and the low-temperature or low-humidity air flow sent from the air discharge port of the air supply device 38 is blown. The air is discharged from the ventilation port 26 of the duct 21 into the storage tank 7.

This air flow is dispersed throughout the storage tank 7 when flowing through the gaps between the individual blocks 40 stacked in the lower part of the inside of the storage tank 7 and stored on the block 40. The coarse aggregates are uniformly distributed in the gaps between the coarse aggregates, and are discharged to the outside of the storage tank 7.

At this time, from the air supply device 38 to the storage tank 7
When the air flow that is supplied to the air is at a low temperature, when the air flow touches the surface of the coarse aggregate, heat exchange is performed between the air flow and the coarse aggregate, and the temperature of the coarse aggregate is reduced. And the coarse aggregate is cooled substantially uniformly.

When the air flow supplied from the air supply device 38 to the storage tank 7 is low in humidity, when the air flow touches the surface of the coarse aggregate, the moisture on the surface of the coarse aggregate is reduced. The temperature of the coarse aggregate is reduced by the latent heat of vaporization when the water is vaporized, and the coarse aggregate is cooled substantially uniformly.

As described above, in the coarse aggregate cooling equipment shown in FIGS. 1 to 5, the low-temperature or low-humidity air flow is circulated through the gaps between the coarse aggregates stored in the storage tank 7. Therefore, the coarse aggregate can be efficiently and substantially uniformly cooled.

Further, when the surface of the coarse aggregate has insufficient water, water is supplied to the water sprinkling tube 15 and water is sprayed from the nozzle 14 to the coarse aggregate, and the coarse aggregate by air flow is supplied. To ensure that the cooling is effected effectively.

The surplus water sprayed from the nozzle 14 to the coarse aggregate is discharged from the sump 16 to the outside of the storage tank 7 through the drain pipe 17, so that the flow of water downward from the gate 11 is suppressed. Thus, damage to the belt conveyor 20 can be reduced.

When the coarse aggregate has been cooled, the belt conveyor 20 is operated, and the gate body 18 is rotated to the open position by the opening / closing cylinder 19 to remove the coarse aggregate to the batcher plant 1 (see FIG. 7). After carrying out the coarse aggregate to the batcher plant 1, the coarse aggregate is carried into the storage tank 7 by the belt conveyor 13.

At this time, since the masses 40 covering the entire air duct 21 are stacked at an angle smaller than the angle of repose and the collapse prevention member 41 is provided, the air duct 21 is not exposed and the mass 40 collapses. do not do.

Therefore, there is no collision of the coarse aggregate to the air duct 21 and the mass 40 does not fall to the gate 11, so that the air duct 21 and the gate 11 can be prevented from being damaged, and the gate 11 can be prevented from being closed. .

FIG. 6 shows a second embodiment of the coarse aggregate cooling system according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same parts. I have.

In this coarse aggregate cooling facility, a partition plate 42 having air permeability is used in place of the block 40 and the collapse preventing member 41 in FIG.

The partition plate 42 is provided at the lower portion inside the storage tank 7 so as to cover the entire ventilation duct 21 and form a downward slope toward the gate 11, and is provided by the belt conveyor 13. The coarse aggregate carried into 7 is stored above the partition plate 42, and a space for the coarse aggregate to move toward the gate 11 is secured.

The partition plate 42 is made of a punched metal or the like in which a number of openings 43 having a smaller shape than the coarse aggregate to be stored in the storage tank 7 are formed. If a space for moving toward the gate 11 is secured, for example, the portion of the partition plate 42 near the inner wall surface of the storage tank 7 may be made substantially flat.

When the coarse aggregate is cooled in the production of the ready-mixed concrete, the air supply device 38 is operated to operate at a low temperature or a low temperature similarly to the above-described coarse aggregate cooling equipment shown in FIGS. The airflow of the humidity is caused to flow out of the ventilation port 26 of the ventilation duct 21 into the storage tank 7.

This air flow is generated by the large number of openings 4 in the partition plate 42.
3 is distributed throughout the storage tank 7 when circulating,
The space between the coarse aggregates stored on the partition plate 42 is evenly distributed and discharged to the outside of the storage tank 7.

At this time, from the air supply device 38 to the storage tank 7
When the air flow that is supplied to the air is at a low temperature, when the air flow touches the surface of the coarse aggregate, heat exchange is performed between the air flow and the coarse aggregate, and the temperature of the coarse aggregate is reduced. And the coarse aggregate is cooled substantially uniformly.

When the air flow supplied from the air supply device 38 to the storage tank 7 is low in humidity, when the air flow touches the surface of the coarse aggregate, the moisture on the surface of the coarse aggregate is reduced. The temperature of the coarse aggregate is reduced by the latent heat of vaporization when the water is vaporized, and the coarse aggregate is cooled substantially uniformly.

As described above, in the coarse aggregate cooling system shown in FIG. 6, a low temperature or low humidity air flow is caused to flow through the gaps between the coarse aggregates stored in the storage tank 7.
It becomes possible to cool the coarse aggregate efficiently and substantially uniformly.

When the coarse aggregate has been cooled, the belt conveyor 20 is operated, and the gate body 18 is rotated to the open position by the opening / closing cylinder 19 to remove the coarse aggregate to the batcher plant 1 (see FIG. 7). After carrying out the coarse aggregate to the batcher plant 1, the coarse aggregate is carried into the storage tank 7 by the belt conveyor 13.

At this time, since the entire ventilation duct 21 is covered with the partition plate 42, the ventilation duct 21 is not exposed.

Therefore, there is no collision of the aggregate with the air duct 21, and the air duct 21 can be prevented from being damaged.

Note that the coarse aggregate cooling equipment of the present invention is not limited to the above-described embodiment, but may be replaced by an annular air duct or a plurality of independent air ducts instead of branch air ducts. It is needless to say that the air duct is arranged at the inner bottom of the storage tank, and that various changes can be made without departing from the spirit of the present invention.

[0071]

As described above, in the coarse aggregate cooling equipment of the present invention, various excellent effects as described below can be obtained.

(1) In the coarse aggregate cooling equipment according to the first aspect of the present invention, the air flow from the air supply device is supplied to the inner bottom portion of the storage tank from the air outlet of the air duct, and is supplied to the storage tank. Since the air flow is circulated in the gaps between the stored coarse aggregates, the coarse aggregates can be efficiently cooled.

(2) Claim 2 or Claim 3 of the present invention
In any of the coarse aggregate cooling equipment described in the above, the air flow from the air supply device is sent to the inner bottom of the storage tank from the air outlet of the air duct, and By distributing the air flow by circulating the air flow through the voids between the aggregates, the air flow is uniformly distributed through the voids between the coarse aggregates stored in the storage tank, so that the coarse aggregates It can be cooled efficiently.

(3) In the coarse aggregate cooling device according to the fourth aspect of the present invention, the collapse of the mass inside the storage tank is prevented by the collapse prevention member, so that the gate is not damaged or closed due to the fall of the mass. Can be prevented.

(4) Claim 5 or Claim 6 of the present invention
In any of the coarse aggregate cooling equipment described in the above, the air flow from the air supply device is sent from the air outlet of the air duct to the fixed portion of the storage tank, and the air flow is circulated through the partition having air permeability. Thus, the air flow is dispersed, and the air flow is uniformly distributed between the coarse aggregates stored in the storage tank, so that the coarse aggregates can be efficiently cooled.

(5) In the coarse aggregate cooling equipment according to claim 7 of the present invention, the low-temperature or low-humidity air flow from the air supply device is applied between the coarse aggregates stored in the storage tank. , The cooling of the coarse aggregate can be promoted.

(6) In the coarse aggregate cooling device according to the eighth aspect of the present invention, water is sprayed from the water sprinkling tube into the storage tank, and the surface of the coarse aggregate stored in the storage tank is exposed to water. Therefore, the cooling of the coarse aggregate can be promoted by the latent heat of vaporization when the moisture on the surface of the coarse aggregate is vaporized by the air flow passing through the gap between the coarse aggregates.

(7) In the coarse aggregate cooling system according to the ninth aspect of the present invention, the surplus water sprayed from the sprinkler pipe to the coarse aggregate inside the storage tank is discharged from the water reservoir through the drain pipe. As a result, the outflow of water downward from the gate can be suppressed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first example of an embodiment of a coarse aggregate cooling facility of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a partially enlarged view of an air duct in FIG. 1;

4 is a view taken in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a view taken in the direction of arrows VV in FIG. 3;

FIG. 6 is a longitudinal sectional view showing a second example of the embodiment of the coarse aggregate cooling equipment of the present invention.

FIG. 7 is a schematic view showing an example of a ready-mixed concrete production facility.

[Explanation of symbols]

 7 Storage Tank 11 Gate 15 Sprinkler Tube 16 Water Pool 17 Drain Pipe 21 Blower Duct 26 Blower Port 38 Air Supply Device 40 Lumped Body 41 Collapse Prevention Member 42 Partition Plate

Continued on front page (72) Inventor Noboru Hirano 16-16 Chuo-cho, Takamatsu-shi, Kagawa Prefecture Inside Kumagaya Gumi Shikoku Branch (72) Inventor Katsutoshi Ibaraki 16-16 Chuo-cho, Takamatsu-shi, Kagawa Prefecture Kumagaya Co., Ltd. Inside the Kumi Shikoku Branch (72) Inventor Hiroyuki Tamai 16-16 Chuo-cho, Takamatsu City, Kagawa Prefecture Inside Kumagaya Gumi Shikoku Branch (72) Inventor Yoshiharu Kaise 16-16 Chuo-cho, Takamatsu City, Kagawa Prefecture Kumagaya Co., Ltd. Kumi Shikoku Branch (72) Inventor Heiji Doi 3174 Showa-cho, Kanazawa-ku, Yokohama, Kanagawa Prefecture Inside Ishikawajima Construction Machinery Co., Ltd. (72) Osamu Chisaka 3174 Showa-cho, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima Construction Machinery Stock In company

Claims (9)

[Claims] 1. A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air flow to the ventilation duct. A coarse aggregate cooling facility, comprising: a supply air supply device. 2. A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air flow to the ventilation duct. A coarse aggregate cooling facility comprising: an air supply device for supplying; and a lump that is piled up at a lower part inside the storage tank so as to form a space that covers the entire ventilation duct and faces the gate. 3. A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air flow to the ventilation duct. A coarse air supply device comprising: an air supply device to be supplied; and a mass piled up at an inner lower portion of the storage tank so as to cover the entire ventilation duct and gradually decrease the pile height toward the gate. Aggregate cooling equipment. 4. A collapse prevention member which covers the mass from above and which prevents the collapse of the mass while ensuring the air permeability from the inner bottom to the upper part of the storage tank. 2. The coarse aggregate cooling equipment according to item 1. 5. A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air flow to the ventilation duct. Coarse bone, comprising: an air supply device to be supplied; and a gas-permeable partition plate provided at an inner lower portion of the storage tank so as to cover the entire air duct and form a space facing the gate. Material cooling equipment. 6. A storage tank having a gate at the bottom and capable of storing coarse aggregate therein, a ventilation duct disposed at an inner bottom of the storage tank and having a ventilation port, and an air flow to the ventilation duct. It is characterized by comprising an air supply device to be supplied, and a gas-permeable partition plate provided at an inner lower portion of the storage tank so as to cover the entire ventilation duct and form a downward slope facing the gate. Coarse aggregate cooling equipment. 7. An air cooling device for supplying a low-temperature or low-humidity air flow to an air duct.
The coarse aggregate cooling facility according to any one of claims 1 to 6. 8. The coarse aggregate cooling facility according to claim 1, wherein a water spray pipe for spraying water into the storage tank is provided above the storage tank. 9. The coarse aggregate cooling equipment according to claim 8, wherein a water reservoir is formed at an inner bottom portion of the storage tank, and a drain pipe is connected to the water reservoir.