JP3181740B2 - Aggregate cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aggregate cooling device.

[0002]

2. Description of the Related Art As shown in FIG.
Is the material that makes up concrete, cement, water,
A plant that weighs admixtures for improving the fluidity and other properties of sand, gravel, and concrete so as to have a prescribed composition, throws these materials into a mixer and kneads them to produce ready-mixed concrete. In general, the supply of aggregates 3 such as sand and gravel to the batcher plant 1
From the stock yard 2 in which is stored through conveyors 4 and 5 such as a belt conveyor.

[0003] The ready-mixed concrete produced in the batcher plant 1 is transported to a casting site and is poured. Particularly, when constructing a large-scale concrete structure, after the concrete is poured due to the heat of hydration of the cement. A large temperature change occurs in the concrete, and in some cases, the resulting crack may occur, which may impair the function and durability of the concrete structure.

As means for solving such a problem, aggregates 3 and cement supplied to the batcher plant 1 are used.
There is pre-cooling that cools materials such as water and suppresses the temperature at which ready-mixed concrete is mixed.

[0005] Conventionally, the main means of cooling the aggregate 3 which is conventionally performed as pre-cooling of ready-mixed concrete includes: 1) cooling by spraying or immersion of cold water (cooling with cold water) 2) cooling by liquid nitrogen at an extremely low temperature ( 3) The air in the container filled with the aggregate is discharged until it is close to a vacuum, the boiling point of water is lowered to about room temperature, and cooling (vacuum cooling) utilizing heat of vaporization at that time is available.

[0006]

The main problems in each of the cooling means described above are listed as follows.

[0007] 1) Cold water cooling-Requires a large-scale cooling plant. -Requires large-capacity auxiliary equipment (water supply equipment, drainage equipment, turbid water treatment equipment, dewatering equipment, etc.).

2) Liquid nitrogen cooling-High running cost. -High pressure and extremely low temperature make handling difficult.・ Large cooling loss.

3) Vacuum cooling-It is difficult to uniformly cool the aggregate.・ Equipment cost is expensive.・ It is difficult to control the surface water of aggregate.

[0010]

In order to achieve the above object, an aggregate cooling device according to claim 1 of the present invention is provided with a tower-shaped cooling device main body and a lower end portion of the cooling device main body. An aggregate cutout hopper, an aggregate input hopper provided at an upper end of the cooling device main body, an air supply port provided near a lower end of the cooling device main body, and provided near an upper end of the cooling device main body. An air outlet, and an air supply device for supplying a low humidity or low temperature air flow to the air supply port,
Aggregate dispersing members provided with a plurality of laterally extending passage blocking members at intervals that allow the aggregate to pass therethrough, and a passage blocking member for each of the aggregate dispersing members vertically adjacent to each other in a plurality of vertical stages in the cooling device body. Are installed so that they face different directions.

Similarly, in the aggregate cooling device according to a second aspect of the present invention, a tower-shaped cooling device main body, an aggregate cutting hopper provided at a lower end portion of the cooling device main body, and the cooling device To the aggregate input hopper provided at the upper end of the main body, the air supply port provided near the lower end of the cooling device main body, the air discharge port provided near the upper end of the cooling device main body, and the air supply port An air supply device for supplying a low-humidity or low-temperature air flow; and an aggregate dispersion member provided with a plurality of laterally extending passage blocking members at intervals at which the aggregate can pass through the cooling device body. It is arranged detachably over a plurality of stages in the vertical direction.

In the aggregate cooling device according to a third aspect of the present invention, a tower-shaped cooling device main body in which a plurality of vertically extending cylindrical bodies are detachably connected, and a lower end portion of the cooling device main body is provided. The provided aggregate cutout hopper, the aggregate input hopper provided at the upper end of the cooling device main body, the air supply port provided near the lower end of the cooling device main body, and the vicinity of the upper end of the cooling device main body. An air discharge port provided, and an air supply device for supplying a low-humidity or low-temperature air flow to the air supply port, and a plurality of laterally extending passage blocking bodies are provided at intervals at which the aggregate can pass. The aggregate dispersing member is mounted in each of the cylinders in a plurality of steps in the vertical direction.

Furthermore, in the aggregate cooling device according to the fourth aspect of the present invention, in addition to the structure of the aggregate cooling device according to the first, second, or third aspect of the present invention, A vibration device is attached to the cooling device body.

[0014]

When the aggregate is cooled by the aggregate cooling device according to the first, second or third aspect of the present invention, low humidity or low temperature air is supplied to the air supply port by the air supply device. When the flow is supplied and the aggregate to be cooled is introduced into the cooling device main body from the aggregate input hopper, the aggregate collides and disperses with the passage blocking body of each aggregate dispersing member and disperses and falls inside the cooling device main body. I do.

At this time, when the low-humidity airflow is supplied by the air supply device, the low-humidity airflow flowing into the cooling device main body touches the surface of the aggregate, and the airflow of the aggregate is reduced. The moisture on the surface is vaporized, the temperature of the aggregate is reduced by the latent heat of vaporization when the moisture is vaporized, the aggregate is cooled substantially uniformly, and the cooled aggregate is stored in the aggregate cutting hopper. You.

When a low-temperature air flow is supplied by the air supply device, the low-temperature air flow flowing into the cooling device body touches the surface of the aggregate, so that the aggregate is substantially removed. The uniformly cooled and cooled aggregate is stored in the aggregate cutting hopper.

Further, the air flow which has cooled the aggregate is discharged from the air outlet to the outside of the cooling device main body.

In the aggregate cooling device according to a fourth aspect of the present invention, when the aggregate to be cooled is put into the cooling device main body, the vibration device is operated, and the cooling of the aggregate is performed by the above-described procedure. Do.

When the vibration device is operated, each of the aggregate dispersing members vibrates through the cooling device main body, so that the aggregate is prevented from adhering and depositing on the upper surface of the passage blocking member of the aggregate dispersing member. Clogging of the aggregate dispersion member due to growth of the sedimentary layer does not occur.

[0020]

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

FIGS. 1 to 4 show an embodiment of an aggregate cooling device according to the present invention, in which 7 is a tower-like cooling device body extending substantially vertically, and 8 is a plurality of cooling devices provided inside the cooling device body 7. The aggregate dispersing member 17 has an aggregate cutout hopper 17 having an aggregate cutout gate 16 provided at the lower end of the cooling device main body 7, and 19 has an aggregate input gate 18 provided at the upper end of the cooling device main body 7. A feeding device such as a belt conveyor extending from a stock yard where the aggregate is stored to above the aggregate feeding hopper 19; and 23 producing ready-mixed concrete from below the aggregate cutting hopper 17. A conveying device 24 such as a belt conveyor extending to the batcher plant is an air supply device connected to the cooling device main body 7 for supplying a low humidity or low temperature air flow S.

The cooling device body 7 includes air chambers 40 and 4.
Each of the cylinders 6 includes one and a plurality of cylinders 6.
Each of the four column members 9 made of angle steel, which extend substantially vertically, has substantially the same length, so that the planar shape of the space formed between the column members 9 is substantially square, and the corners of the angle steel Are arranged so as to face the center side of the space, and side wall members 10 are arranged between adjacent column members 9 and 9 so as to surround the space from four sides. It has a structure in which the member 9 is fixed so as to be in close contact with the teeth of the angle steel.

The side wall member 10 includes an inner plate 25 made of a metal plate such as a steel plate forming the inner surface of the cylindrical body 6, and an inner plate 25.
And an outer plate 26 made of a heat insulating material also having a soundproof effect and forming an outer surface of the cylindrical body 6.

The air chamber 40 includes an outer structure 27 having a box structure, and a frame-shaped inner structure 28 having a plane shape substantially similar to that of the cylindrical body 6 and penetrating the outer structure 27 up and down. And an air flow path 29 is formed between the inside of the external structure 27 and the outside of the internal structure 28.

On one side of the external structure 27, an air supply port 20 for communicating the outside with the inside is provided, and on both sides of the internal structure 28, the air flow passage 29 extends from the air passage 29 to the internal structure. An air inlet 30 penetrating inward and having a flow straightening plate 31 is provided.

The air chamber 41 has a box-shaped external structure 32 and a frame-shaped internal structure 33 having a plane shape substantially similar to that of the cylindrical body 6 and penetrating the external structure 32 vertically. And an air flow path 34 is formed between an inner portion of the outer structure 32 and an outer portion of the inner structure 33.

Each side surface of the external structure 32 is provided with an air discharge port 21 for communicating the inside with the outside, and each side surface of the internal structure 33 is provided from the inside of the internal structure 33. An air outlet 35 having a flow straightening plate 36 penetrating into the air flow path 34 is provided.

At the upper and lower ends of each of the column members 9, a plate-like connecting seat 12 having a bolt hole 11 formed in the center is mounted substantially horizontally, and an air chamber 40, each cylinder 6, an air chamber 41 are sequentially stacked such that the connection seat 12 at the lower end of the column member 9 abuts on the connection seat 12 at the upper end of the column member 9 via an elastic member (not shown). The air chamber 40 and the cylinder 6, the upper and lower cylinders 6, and the cylinder 6 and the air chamber 41 are fastened to each other by bolts inserted through the cooling device main body 7.
Is formed.

On the other hand, the aggregate dispersing member 8 is provided between a pair of support members 13 made of flat steel having substantially the same horizontal length.
A plurality of passage blocking members 1 made of angle steel or the like having substantially the same length.
4 and 15 are arranged in parallel with each other and substantially horizontally at an interval through which the aggregate 3 can pass. One end of each of the passage preventing members 14 and 15 is provided on one of the support members 13 and It has a structure in which the other end of each of the passage preventing members 14 and 15 is fixed to the other.

Each of the aggregate dispersing members 8 has five passage blocking members 14 made of angle steel and one passage blocking member 15 made of flat steel. The passage preventing body 15 is fixed to the support member 13 so that the portion faces upward, and the front and back surfaces are inclined. It is detachably supported on a column member 9 of the body 6 via an engaging means such as a bolt.

Each of the cylinders 6 has a plurality of aggregate dispersion members 8.
Each of the bones provided alternately in the vertical direction so that the extending directions of the passage preventing members 14 and 15 of the vertically adjacent aggregate dispersing members 8 and 8 are different from each other by 90 °. The passage preventing members 14 and 15 of the material dispersing member 8 do not overlap with each other.

Further, an air supply device 24 is connected to the air supply port 20 of the air chamber 40.

Reference numeral 39 in the figure denotes a vibrator attached to the side wall member 10 of each of the cylinders 6.

Hereinafter, the operation of this embodiment will be described.

When cooling the aggregate 3 in the production of ready-mixed concrete, the air supply device 24 is operated to
A low humidity or low temperature air flow S is supplied from the air supply device 24 to the air supply port 20 provided in the air chamber 40.

The air flow S flows into the cooling device main body 7 through the air flow path 29 of the air chamber 40 and the air flow inlet 30.

At this time, in this embodiment, each cylinder 6
Since the outer plate 26 of the side wall member 10 is made of a heat insulating material, the temperature of the airflow S flowing through the inside of the cooling device body 7 can be suppressed from rising due to the influence of the atmosphere outside the cooling device body 7.

At this time, when the air flow S supplied by the air supply device 24 has a low humidity, the air flow S touches the surface of the aggregate 3 to reduce the moisture on the surface of the aggregate 3. Aggregate 3 due to the latent heat of vaporization when the water vaporizes
Is reduced, and as a result, the aggregate 3 is cooled substantially uniformly, and the cooled aggregate 3 is stored in the aggregate cutout hopper 17.

When the air flow S supplied by the air supply device 24 is at a low temperature, the air flow S touches the surface of the aggregate 3 so that the aggregate 3 is cooled substantially uniformly. The cooled aggregate 3 is stored in the aggregate cutting hopper 17.

On the other hand, the air flow S that has cooled the aggregate 3 is discharged to the outside through the air outlet 35, the air flow path 34 of the air chamber 41, and the air discharge port 21.

As described above, in this embodiment, the aggregate 3
Collides with the passage preventing members 14 and 15 of each aggregate dispersing member 8, thereby suppressing the falling speed of the aggregate 3 and increasing the area where the aggregate 3 is dispersed and comes into contact with the air flow S. Aggregate 3 can be cooled effectively.

The outer plate 2 of the side wall member 10 of each cylindrical body 6
6 is a heat insulating material also having a soundproof effect, so that when the aggregate 3 is put into the cooling device main body 7 from the aggregate input hopper 19, noise is hardly transmitted to the outside of the cooling device main body 7.

Further, since each of the aggregate dispersing members 8 is vibrated by each of the vibrators 39 through each of the cylinders 6, the aggregate 3 adheres and accumulates on the upper side surfaces of the passage preventing members 14 and 15 of the aggregate dispersing member 8. Therefore, clogging of the aggregate dispersion member 8 due to the growth of the aggregate deposit layer does not occur.

When a predetermined amount of the cooled aggregate 3 is stored in the aggregate cutout hopper 17, the aggregate cutout gate 16 is opened, and the aggregate 3 in the aggregate cutout hopper 17 is transported. The raw material is transported to the batcher plant by the device 23 to produce ready-mixed concrete.

In this embodiment described above, each of the aggregate dispersing members 8
Is detachably supported on the cylindrical body 6, and when the passage blocking members 14 and 15 are worn out due to long-term use, the aggregate dispersing member 8 having the worn passage blocking members 14 and 15 is used. Only the replacement can be performed, and the arrangement of the aggregate dispersion member 8 can be changed so as to correspond to the particle size and specific gravity of the aggregate 3.

Further, the cylindrical body 6 forming the cooling device main body 7,
Since the air chambers 40 and 41 can be divided from each other, the aggregate cooling device can be easily installed and easily withdrawn, and the cylinder 6 and the air chambers 40 and 41 can be used for a long period of time. When damaged, only the damaged cylinder 6 and the air chambers 40 and 41 can be replaced.

The aggregate cooling device of the present invention is not limited to the above-described embodiment. The number and shape of the passage blocking members of the aggregate dispersing member can be appropriately changed, Needless to say, the shape can be changed to a shape other than a substantially square, the structure of the side wall member of the cylindrical body is appropriately changed, and various changes can be made without departing from the gist of the present invention.

[0048]

As described above, according to the aggregate cooling device of the present invention, the following various excellent effects can be obtained.

(1) In any one of the aggregate cooling devices according to the first to fourth aspects of the present invention, the aggregate is dropped in the aggregate cooling device main body, and the aggregate is cooled by low humidity or low temperature air. By cooling the aggregate, the aggregate can be cooled substantially uniformly.

(2) In any of the aggregate cooling devices according to the first to fourth aspects of the present invention, the aggregate supplied from the aggregate input hopper into the cooling device main body does not directly fall, By colliding with the passage blocking body of each aggregate dispersing member, the falling speed of the aggregate is suppressed, and the area where the aggregate disperses and comes into contact with the air flow S increases, so that the cooling of the aggregate is effectively performed. It can be performed.

(3) In any of the aggregate cooling devices described in claims 1 to 4 of the present invention, large-scale auxiliary equipment such as turbid water treatment equipment and draining equipment is not required, so that the conventional cold water The size of the equipment is smaller than the cooling processing of the aggregate by cooling or the like, and the initial equipment cost can be reduced.

(4) In any of the aggregate cooling devices according to the first to fourth aspects of the present invention, the aggregate is cooled by the moisture on the surface of the aggregate and the low humidity air.
The cooling means is extremely clean, and there is no danger such as the conventional measures against oxygen deficiency in liquid nitrogen and breakage of the pressure vessel in vacuum cooling, and the apparatus is excellent in safety and economy.

(5) In any one of the aggregate cooling devices according to the first to fourth aspects of the present invention, the aggregate to be cooled is a fine aggregate having a small particle diameter and the humidity is reduced by the air supply device. In the case of supplying air, since the surface water rate of the fine aggregate is reduced due to the vaporization of moisture, the quality control of the ready-mixed concrete to be manufactured becomes easy, and the amount of the surface water rate is reduced when kneading. Since the amount of water mixed with cold water can be increased, pre-cooling of ready-mixed concrete can be performed more effectively.

(6) In the aggregate cooling device according to the first aspect of the present invention, the passage blocking bodies of the aggregate dispersing members vertically adjacent to each other in a plurality of stages in the vertical direction in the cooling device main body have different directions. Since the aggregate dispersing member is mounted so as to face, the falling aggregate can be effectively dispersed.

(7) In the aggregate cooling device according to the second aspect of the present invention, since each aggregate dispersion member is detachably supported on the cooling device main body, passage is prevented by long-term use. When the body is exhausted, only the aggregate dispersing member having the exhausted passage blocking member can be replaced, and the aggregate dispersing member is adjusted to correspond to the particle size and specific gravity of the aggregate to be cooled. Can be changed.

(8) In the aggregate cooling device according to the third aspect of the present invention, since the cooling device body is formed by a plurality of cylinders, the aggregate cooling device is easily installed and easily withdrawn. In addition, when a specific cylinder is damaged due to long-term use, only the damaged cylinder can be replaced.

(9) In the aggregate cooling device according to the fourth aspect of the present invention, since each of the aggregate dispersing members is vibrated by the vibrator through the cooling device main body, the aggregate is prevented from passing through the aggregate dispersing member. Adhesion and deposition on the upper surface of the body is suppressed, and clogging of the aggregate dispersion member due to growth of the aggregate deposition layer does not occur.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the concept of an embodiment of an aggregate cooling device of the present invention.

FIG. 2 is a partially cutaway perspective view of a cylindrical body constituting a cooling device main body of one embodiment of the aggregate cooling device of the present invention.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 1;

FIG. 5 is a layout diagram showing an example of a conventional batcher plant.

[Explanation of symbols]

 Reference Signs List 6 cylindrical body 7 cooling device main body 8 aggregate dispersing member 14, 15 passage blocking body 17 aggregate cutout hopper 19 aggregate input hopper 20 air supply port 21 air discharge port 24 air supply device 39 vibrator (vibrator)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seiji 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Stock Company Kumagaya Gumi Tokyo Head Office (72) Inventor Ryoji Egami 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Stock Company Kumagai Gumi Tokyo head office (72) Inventor Yoshiyuki Takada 3174 Showa-cho, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima Construction Machinery Co., Ltd. Yokohama Plant (58) Field surveyed (Int.Cl. ⁷ , DB name) B28C 7 / 00

Claims (4)

(57) [Claims] 1. A tower-shaped cooling device main body, an aggregate cutout hopper provided at a lower end portion of the cooling device main body, an aggregate input hopper provided at an upper end portion of the cooling device main body, and the cooling device main body An air supply port provided near a lower end of the cooling device body, an air discharge port provided near an upper end of the cooling device main body, and an air supply device for supplying a low-humidity or low-temperature air flow to the air supply port. Then, an aggregate dispersing member provided with a plurality of laterally extending passage blocking members at intervals that allow the aggregate to pass therethrough is provided in the cooling device main body so that each of the aggregate dispersing members vertically adjacent to each other over a plurality of stages in the vertical direction. An aggregate cooling device, wherein the blocking bodies are attached so as to face different directions. 2. A tower-shaped cooling device main body, an aggregate cutting hopper provided at a lower end portion of the cooling device main body, an aggregate input hopper provided at an upper end portion of the cooling device main body, and the cooling device main body. An air supply port provided near a lower end of the cooling device body, an air discharge port provided near an upper end of the cooling device main body, and an air supply device for supplying a low-humidity or low-temperature air flow to the air supply port. And a bone dispersing member provided with a plurality of laterally extending passage blocking members at intervals at which the aggregate can pass therethrough, which is detachably disposed in the cooling device main body in a plurality of vertical stages. Material cooling device. 3. A tower-shaped cooling device main body in which a plurality of vertically extending cylinders are detachably connected, an aggregate cutting hopper provided at a lower end of the cooling device main body, and an upper end portion of the cooling device main body. , An air supply port provided near the lower end of the cooling device main body, an air discharge port provided near the upper end of the cooling device main body, and a low humidity or low An air supply device for supplying a flow of air at a temperature, and a plurality of aggregate dispersing members provided with a plurality of laterally extending passage blocking members at intervals at which the aggregates can pass therethrough; An aggregate cooling device characterized by being attached over a step. 4. The aggregate cooling device according to claim 1, wherein the vibrating device is attached to the cooling device main body.