JPH0532196Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gravel discharge device used in an aggregate recovery device.

[Prior art] Fresh concrete used in construction work is usually prepared at a ready-mixed concrete production factory outside the construction site and transported to the construction site using transportation means such as a concrete mixer truck. is larger than the amount of ready-mixed concrete that is required in advance to account for losses during pumping of ready-mixed concrete at the construction site. If the amount was less, the remaining ready-mixed concrete would be dumped at an industrial waste disposal site using transport means such as a concrete mixer truck, or taken back to a ready-mixed concrete production factory.

Conventionally, when ready-mixed concrete is brought back to a ready-mixed concrete production factory, gravel, which forms the aggregate of the ready-mixed concrete, is removed from the slurry-like ready-mixed concrete.
As a device for recovering sand etc., there is a device described in Japanese Patent Publication No. 57-38952.

[Problems to be solved by the invention] However, with the conventional device described above, it is not possible to separate and collect gravel and sand when recovering aggregate from ready-mixed concrete, and it is necessary to separate gravel and sand separately. requires separate equipment.

The present invention solves the above-mentioned problems, and aims to collect aggregate from fresh concrete and collect gravel separately.

[Means for Solving the Problems] The present invention provides a cylindrical sealed container rotatably supported around an axis extending in the horizontal direction, and a plurality of holes of a desired shape are formed on the outer peripheral surface of the cylindrical sealed container. A porous drum is provided to form a porous drum, a slurry supply port is provided at one end of the porous drum, and a solids discharge port is provided at the other end of the porous drum, and fresh concrete is supplied into the porous drum from the slurry supply port toward the solids discharge port. In an aggregate recovery apparatus having a conveying device, a gutter-shaped solid material guide path extending in the radial direction of the porous drum is provided at an end of the porous drum on the solid material discharge port side, and an opening of the gutter is connected to the porous drum. A plurality of holes are fixed at required intervals in the circumferential direction so as to face in the direction of rotation of the solid material guide path, and a plurality of holes of a desired shape are provided in the bottom part of the gutter of each solid material guide path, and the bottom part with the holes is provided with a plurality of holes having a desired shape. bending an end near the outer periphery of the porous drum toward the rotating direction of the porous drum, and fixing a guide plate extending to the solid material discharge port to an end of each of the solid material guide paths near the axis of the porous drum; A spiral guide screw extending outward from the inside of the porous drum is fixed to the inner circumferential surface of the solid material discharge port.

[Function] When the perforated drum is rotated and the ready-mixed concrete, whose fluidity has been improved by mixing water, flows into the perforated drum from the slurry supply port, the ready-mixed concrete will be mixed with the rotation of the perforated drum. Concrete is transported by a moving device towards a solids outlet.

Among the ready-mixed concrete, sand, etc., which is smaller in shape than gravel, flows out of the device through the holes in the porous drum along with the water mixed in the ready-mixed concrete, and only the gravel collects at the end of the porous drum on the solids discharge port side. do.

Gravel collected at the end of the porous drum on the solids discharge port side is scooped up into a gutter-like solids guide path as the porous drum rotates, and is also swept along the solids guide path by gravity. It moves toward the axis of the porous drum, is guided to the solid material discharge port via the guide plate, and is discharged to a predetermined position outside the apparatus by the guide screw.

Therefore, gravel, sand, etc. can be collected separately.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 13 show an embodiment of the present invention.

A solid guide path 1 extending in the radial direction of the porous drum 5 is provided on the end plate 4b inside the porous drum 5 of the aggregate recovery device.
A plurality of pieces 8 are fixed at required intervals in the circumferential direction.

The solid matter guide path 18 is formed in the shape of a gutter from a steel plate 20 and an expanded metal 21, and is arranged so that the opening 19 of the gutter faces in the direction of rotation of the porous drum 5. An end of the expanded metal 21 forming the bottom near the outer periphery of the end plate 4b is bent toward the rotating direction of the porous drum 5.

The porous drum 5 connects two cylindrical expanded metals 1 via a cylindrical punching metal 2 to form a cylindrical shape, and connects the ends of each expanded metal 1 that are not connected to the punching metal 2. End plates 4a and 4b having openings 3a and 3b are respectively fixed to the parts.

The end plate 4a at one end of the porous drum 5 has a cylindrical slurry supply port 6, and the other end has a trumpet-shaped solids discharge port 7, which communicates between the inside and outside of the porous drum 5 through an opening 3a or 3b, respectively. The slurry supply port 6 is connected to the frame 8.
The solid material discharge port 7 is mounted on a roller 10 which is fitted into a roller bearing 9 provided in the frame 8 and rotatably supported by the frame 8.

A sprocket 11 is fixed to the outer periphery of the slurry supply port 6, and the sprocket 11 is connected to the sprocket 13 of a motor 12 disposed at a predetermined position on the frame 8 via a chain belt 14 when viewed from the side of the slurry supply port 6. They are connected to rotate clockwise.

At the lower part of the frame 8, there is provided a water tank 15 that can contain approximately the lower half of the porous drum 5 from its axis, and the inner bottom plate 30 of the water tank 15 is
It has an inner diameter larger than the outer diameter and is curved along the circumferential direction.

Furthermore, an overflow tank 31 is provided at a required position of the water tank 15.

A plurality of angles 17 extending parallel to the axis of the porous drum 5 are fixed to the inside of the porous drum 5 at required intervals in the circumferential direction.
A guide plate 16 formed in a predetermined shape is fixed at the intersection of the angle 17 and the spiral that runs clockwise from the slurry supply port 6 toward the solids discharge port 7 on the inner surface, respectively, along the spiral. There is.

A guide plate 22 extending to the solid material discharge port 7 is fixed to the end of the solid material guide path 18 near the axis of the porous drum 5, and a guide plate 22 extending from the inside of the porous drum 5 to the outside is attached to the inner periphery of the solid material discharge port 7. A spiral guide screw 23 extending clockwise is fixed.

A required number of buckets 24 are fixed to a portion formed of the punching metal 2 on the outside of the perforated drum 5 so that the openings 25 of the buckets 24 face in the direction of rotation of the perforated drum 5, and the required number of buckets 24 are fixed at the required positions of the frame 8. The shutter 26 is connected to the entrance 27 of the shutter 26.
is arranged so that it can face the opening 25 of the bucket 24.

Of the portion of the porous drum 5 formed of the expanded metal 1, a spiral guide screw is provided outside the expanded metal 1 near the slurry supply port 6 and extends clockwise from the slurry supply port 6 toward the solid material discharge port 7. 28a is fixed via a flat steel 29a, and similarly a spiral guide screw 28b is provided outside the expanded metal 1 near the solids discharge port 7 and extends counterclockwise from the solids discharge port 7 toward the slurry supply port 6. are fixed via flat steel 29b.

A small gap is maintained between the radially outer ends of the guide screws 28a and 28b with respect to the inner bottom plate 30 of the water tank 15.

Next, the operation of the present invention will be explained.

When collecting aggregates such as gravel and sand from fresh concrete, the motor 12 is operated and the sprocket 1
3. The porous drum 5 is rotated via the chain belt 14 and the sprocket 11, and the ready-mixed concrete whose fluidity has been improved by mixing water is allowed to flow into the porous drum 5 from the slurry supply port 6.

The fresh concrete that has flowed into the porous drum 5 is transferred toward the mirror plate 4b by the guide plate 16 as the porous drum 5 rotates.

Sand and cement in the fresh concrete flow out into the water tank 15 through the holes of the porous drum together with the water mixed in the fresh concrete, and only the gravel is transferred to the vicinity of the mirror plate 4b.

As the perforated drum 5 rotates, the gravel transferred to the vicinity of the mirror plate 4b is scooped up onto the expanded metal 21 forming the solid material guide path 18, and is moved by gravity along the solid material guide path 18 to the perforated drum 5. The solid material is moved in the axial direction of the solid material discharge port 7 through the guide plate 22, and is discharged to the outside of the apparatus by the guide screw 23 inside the solid material discharge port 7.

At this time, since the end of the expanded metal 21 forming the solid material guide path 18 near the outer periphery of the end plate 4b is bent toward the rotating direction of the porous drum 5, the gravel is reliably scooped up into the expanded metal 21. .

Furthermore, the sand and cement adhering to the scooped up gravel fall into the perforated drum 5 through the holes in the expanded metal 21, and then flow into the water tank 15 along with water through the holes in the expanded metal 1 forming the perforated drum 5. Only the gravel is discharged to the outside of the device.

On the other hand, the sand and cement that flowed into the water tank 15 from the perforated drum 5 with water have larger particles than the cement and settle on the inner bottom plate 30, and as the perforated drum 5 rotates, the precipitated sand flows through the guide screen. It is transferred from each end plate 4a, 4b toward the center of the porous drum 5 by the u 28a, 28b.

The sand transferred to the center of the porous drum 5 is scooped up into a bucket 24 as the porous drum 5 rotates, and is discharged to the outside of the apparatus by a shooter 26.

Furthermore, since the cement in the fresh concrete that has flowed into the porous drum 5 has smaller particles than sand, it floats in the water in the water tank 15 and then flows into the overflow tank 31 mixed with the water overflowing from the water tank 15. , is transferred from the overflow tank 31 to a settling tank (not shown), and then settles in the settling tank over time.

It should be noted that the gravel discharge device of the present invention is not limited to the above-mentioned embodiments, but can also be used to collect solid matter from slurries other than ready-mixed concrete, and other improvements may be made within the scope of the gist of the present invention. It goes without saying that various changes can be made.

[Effects of the invention] As explained above, according to the gravel discharge device of the invention, aggregate can be recovered from fresh concrete and gravel and sand in the aggregate can be recovered separately, so that the aggregate can be collected separately. There is no need to separate the materials using a separate device, and the excellent effect of immediately reusing gravel and sand can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is a - arrow view of Fig. 1, and Fig. 3 is a - arrow view of Fig. 2.
FIG. 4 is a view in the direction of the − arrow in FIG. 2, FIG. 5 is a view in the direction of the − arrow in FIG. 2, FIG. 6 is an explanatory view of the perforated drum, and FIG. 8 is a view from the - arrow direction in FIG. 6, and FIG. 9 is an explanatory diagram of the aggregate recovery device using the perforated drum shown in FIG.
0 is a view in the - arrow direction of Fig. 9, Fig. 11 is an explanatory diagram of the vicinity of the slurry supply port, Fig. 12 is a - arrow view in Fig. 11, and Fig. 13 is a - arrow view in Fig. 9.
It is an arrow view. In the figure, 5 is a porous drum, 6 is a slurry supply port,
7 is a solid material discharge port, 18 is a solid material guide path, 22 is a guide plate, and 23 is a guide screw.

Claims (1)

[Scope of utility model registration request] A cylindrical sealed container rotatably supported around an axis extending in the horizontal direction is provided, a plurality of holes of a desired shape are provided on the outer peripheral surface of the cylindrical sealed container to form a perforated drum, and an end of the perforated drum is provided. In the aggregate recovery apparatus, the apparatus includes a slurry supply port on one side and a solids discharge port on the other side, and a device for transferring fresh concrete from the slurry supply port to the solids discharge port in the porous drum. A gutter-shaped solid material guide path extending in the radial direction of the porous drum is provided at the end of the porous drum on the solid material discharge port side in the circumferential direction so that the opening of the gutter faces in the rotating direction of the porous drum. A plurality of holes are fixed at required intervals, and a plurality of holes of a desired shape are provided in the bottom of the gutter of each solid guide path, and the end of the bottom near the outer circumference of the porous drum is connected to the porous drum. A guide plate extending to the solid material discharge port is fixed to an end of each of the solid material guide paths near the porous drum axis, and a porous drum is bent toward the solid material discharge port. A gravel discharge device characterized by a fixed spiral guide screw extending from the inside to the outside.