JP3452180B2 - Double drum type milling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-drum type scouring device, and more particularly to scouring concrete waste material ,
The present invention relates to a double-drum type polishing device capable of simultaneously extracting a coarse component such as coarse aggregate and a fine component such as fine aggregate with one device.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for separating and recovering fine aggregate from waste concrete, for example, JP-A-4-21 has been known.
The one described in Japanese Patent No. 550 is known. This device has a structure in which a ventilation type rotating drum is provided, and after the coarse aggregate of the concrete waste material is separated is put in the rotating drum, a weir is provided at the end. That is,
The tip of the rotary drum is provided with a supply port for fine aggregate, cement hydrate, etc., and an air port for supplying air.
Further, a plurality of scraping plates are provided so as to project along the circumferential direction on the inner surface of the body of the rotary drum. Furthermore, at the end of this rotating drum, a donut disk-shaped weir,
Great and is fixed.

Therefore, in this apparatus, fine aggregate, cement hydrate and the like are supplied to the rotating drum, and air is sent into the drum. Fine aggregate,
Cement hydrate or the like is scraped up by a scraping plate in the drum and falls. As a result of repeating the scraping and dropping, fine aggregate, cement hydrate and the like are crushed. Further, the fine powder generated in the drum is sucked, and only the fine aggregate is separated and discharged.

[0004]

However, in such a conventional device, since the fine aggregate is scraped up by the scraping plate in the drum and dropped, the charged raw materials are It was crushed and difficult to use as fine aggregate. Moreover, in this conventional apparatus, the coarse aggregate had to be separated from the concrete waste material as the raw material in advance. As a result, there is a problem that a step of collecting coarse aggregate and a step of collecting fine aggregate are separately provided, which increases equipment cost and takes time and effort to collect both aggregates.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a double-drum type polishing device capable of simultaneously recovering a coarse component and a fine component from a solid substance by one device. I am trying. Further, it is an object of the present invention to provide a double-drum type polishing device capable of removing fine powder of solid matter generated during polishing.

[0006]

The invention according to claim 1 is a double-drum type for recovering a coarse component such as coarse aggregate and a fine component such as fine aggregate by grinding a concrete waste material. An outer drum having a rotating shaft located in a substantially horizontal plane and rotatably provided, and the rotating shaft is housed inside the outer drum and the rotating shaft coincides with the rotating shaft of the outer drum. An inner drum, and a grinding medium that is housed inside the inner drum and that grinds the concrete waste material, and that is provided in the inner drum to allow the fine components to pass through to the outer drum side, and the coarse components to be the inner drum. , A fine component collecting unit for collecting fine components discharged from the inside of the outer drum, and a crude component collecting unit for collecting crude components discharged from the inside of the inner drum. When,
Blow 300 to 500 ° C hot air into the inner drum
And the inside of the inner drum and
And / or a fine powder of the above solid generated inside the outer drum
It is a double-drum type rubbed device provided with a discharging means for discharging to the outside of the outer drum .

The term "polishing" as used herein refers to rubbing a solid material and a grinding medium or solid materials with each other to make them finer. In addition, the solid that is rubbed in the drum
The thing is concrete waste material. Further, the coarse and fine components obtained by grinding the solid matter are not limited to the coarse aggregate and the fine aggregate. Further, the mesh size of the mesh portion is not limited. However, the size of the fine component is determined by this mesh size. For example, in the case of concrete waste, by setting the mesh size to 5 mm, a fine aggregate that becomes a part of the cement raw material (generally, a grain having a particle size of less than 5 mm is referred to as a fine aggregate, and a grain having a particle size of 5 mm or more is referred to as coarse aggregate). Is obtained.

The grinding medium is not limited to the rod-shaped medium described in claim 2, but may be a ball-shaped or plate-shaped medium. The grinding medium can be appropriately selected depending on the type of the grinding object. The coarse component recovery unit and the fine component recovery unit have a structure capable of recovering the corresponding coarse and fine components, for example, a self-weight drop type such as a chute, a belt conveyor for automatically conveying, a bucket conveyor, etc. Any of various automatic transfer methods may be used. What is essential is that the grinding device has a double-drum structure so that the solid matter can be separated and recovered into relatively large coarse and fine components by the grinding with the grinding medium. Blower here
The stages are those that can blow air into the inner drum.
Any structure may be used as long as it has any structure. In general,
Has a ventilation duct and fan that communicate with the opening of the drum.
is doing. Also, because this is a waste of concrete, this blower
The stage is used as a blower for hot air (about 300 to 500 ° C)
It This is the coefficient of thermal expansion of waste materials by heating them.
This is because the separation and peeling can be easily performed depending on the difference. Shi
Therefore, in the case of this blower for hot air, in the blower duct
It is possible to adopt the one in which a heater is provided. Well
Also, the means for discharging the fine powder (for example, the suction port) is a double drum.
It may be formed at any position of the scouring device. Sanawa
The inner drum side of this sanding machine (inner drum, coarse component
It may be formed on the outer drum side (including the recovery unit).
(Including a ram and a fine component collecting part). Inner Dora
If it is formed on the inner side, there is no risk of drawing in fine components.
It Furthermore, a fan and a dust collector are installed on the downstream side of the suction port.
It is preferable to deploy such as. Negative pressure by this fan
Sucks out fine powder from inside the drum and releases it to the atmosphere
Before use, collect with a dust collector.

According to a second aspect of the present invention, the sanding medium has a length of about 20% of the length of the inner drum.
The double-drum type scouring device according to claim 1, which includes the bar material . The bar material for the sanding medium is, for example, deformed rebar, simple columnar ordinary rebar, one in which rebars are connected in a nunchaku shape by a chain, two rebars, or three rebars.
Examples include books that are bundled with four pieces.

The invention as defined in claim 3 is directed to the discharge of the fine powder.
The output means is the double-drum type polishing device according to claim 1 or 2, which is formed on the inner drum side .

[0011]

According to the present invention, the concrete inside the inner drum is
Load the scrap waste material and rotate it. As a result, the solid matter is rubbed by the rubbed medium. At that time, the fine components pass through the net portion to the outer drum. Of the solid matter scraped off, the crude component discharged from the inner drum is recovered by the crude component recovery unit. On the other hand, the fine components are recovered from the outer drum through the fine component recovery unit. As a result, a single device can simultaneously recover the crude component and the fine component from the solid matter.

The air is sent from the air blower to the inside of the inner drum.
When inserted, concrete generated in the drum during grinding
The fine powder of waste material flies away from the surfaces of the coarse and fine components. After that, since the flying fine powder is sucked out of the drum through the suction port (discharging means), it is possible to collect high-quality coarse components and fine components in which fine powder generated during grinding is not attached to the surface. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a fraying device according to the present invention will be described below with reference to the drawings. 1 and 2
The purpose of the present invention is to explain a double-drum type fogging device according to an embodiment of the present invention. In these figures, 1
Is a base (or floor) whose top surface is horizontal.
A double drum 2 is rotatably provided on the above. The double drum 2 includes a horizontally placed outer drum 2A that is rotatably provided with its rotation axis located in a substantially horizontal plane, and its rotation axis matches the rotation axis of the outer drum 2A. It is composed of an inner drum 2B in which a large number of mesh portions 30 made of wire mesh having a mesh size of 5 mm are stretched over the entire drum body which is longer than the drum 2A in the longitudinal direction. The network unit 30, Conch
Sieving the waste waste wood into coarse aggregate and fine aggregate. An annular gear 3 is arranged on the outer peripheral surface of the outer drum 2A in the longitudinal middle portion. The base 1 is provided with a drive gear 4 that meshes with the annular gear 3 and rotationally drives the double drum 2. The drive gear 4 is configured to be driven by a drive mechanism (including a motor, a speed reducer, etc.) not shown. Support rollers (annular rings having a flat surface and a predetermined width) 5 and 6 are fixed to the outer peripheral surfaces of both ends in the longitudinal direction of the outer drum 2A. These support rollers 5 and 6 are the base 1
And is slidably supported by roller guides 7 and 8 each having a predetermined curvature and curved upward in a concave shape.

Both ends in the longitudinal direction of this cylindrical double drum 2 are open, and a predetermined ventilation (hot air of about 300 to 500 ° C.) is provided from the opening at one end to the inside of the inner drum 2B.
Is done. That is, an outlet of a blower pipe 10 connected to a blower, which is an example of a blower, is provided in communication with the one end opening, and ventilation is performed at a predetermined flow velocity and a predetermined flow rate through the blower pipe 10. . Further, an outlet of a supply pipe 11 for concrete waste material is in communication with an opening at one end of the double drum 2. The outlet end of the supply pipe 11 is inclined and inserted into one end of the inner drum 2B, and the concrete waste material is supplied from the supply pipe 11 to the bottom of the inner drum 2B. Reference numeral 20 is a sealing material between the rotating outer drum 2A and the blower pipe 10.

On the other hand, a recovery section for the coarse aggregate and the fine aggregate is attached to the opening at the other end of the double drum 2 in the longitudinal direction. Specifically, the outer drum 2A passes through the net portion 30.
The fine aggregate chute (fine component collecting part) 31 for discharging the fine aggregate having a particle diameter of less than 5 mm accumulated therein from the discharge port 16A,
It is attached to the lower part of the other end of the inner drum 2B. At the other end of the outer drum 2A, a large coarse aggregate chute (coarse component recovery unit) 32 for recovering the coarse aggregate remaining inside the inner drum 2B is provided at the other end of the outer drum 2A. It is attached to wrap around. This coarse aggregate chute 3
A suction port 33 (discharging means) for discharging fine powder of concrete waste material generated inside the double drum 2 (inner and outer drums 2A and 2B) at the time of scouring at the upper part of 2
Are formed. Downstream of the suction port 33, a dust collector that captures and collects fine powder through a duct (not shown) is connected. Further, a discharge pipe 16B is connected to a lower portion of the coarse aggregate chute 32. In FIG. 1, 34 is a sealing material between the inner drum 2B and the fine aggregate chute 31, and 35 is a sealing material between the outer drum 2A and the coarse aggregate chute 32. Further, 36 is a coarse aggregate dropping port formed at the center of the other end surface of the inner drum 2B.

Inside the inner drum 2B, a plurality of deformed rebars (deformed bar steels) 18 serving as a sanding medium are movably accommodated. The deformed rebar 18 is a steel bar having a predetermined length and a predetermined diameter (for example, 6 mm diameter) and a circular cross section. As shown in FIGS. 2 (A), (B), and (C), the deformed bar 18 having a length of about 20% of the drum length
Can it to accommodate the large number to the drum. Furthermore, 2
The deformed rebars 18 of a book connected by chains can be used as a sanding medium (B). In addition, deformed rebar 18
It is also possible to use a bundle of three small diameter steel bars (C).

In the double-drum type polishing device having the above-mentioned structure, while the double-drum 2 is rotated around its axis at a predetermined speed by a drive mechanism (not shown), for example, a concrete waste material is input from the supply port. In addition, a predetermined amount of air (hot air) is blown from the air vent. As a result of the operation for a predetermined time (for example, 30 minutes to 60 minutes) in this state, the double drum 2
Inside the inner drum 2B, the concrete waste material heated to about 300 ° C. is ground by the deformed bar 18 and separated into aggregate (coarse and fine coarse aggregate) and fine powder. Then, the adhering component (mortar or the like) is removed from the surface of the aggregate. The adhered components and the like become fine powder and are discharged to the dust collector through the suction port 33 together with air. Among the aggregates, those having a predetermined grain size (less than 5 mm) pass through the net portion 30 and fall to the lower portion of the outer drum 2A. This small fine aggregate is discharged from the discharge port 16A from the other end of the outer drum 2A through the fine aggregate chute 31. On the other hand, the coarse aggregate having a particle diameter of 5 mm or more remaining inside the inner drum 2B is dropped to the coarse aggregate chute 32 from the coarse aggregate dropping port 36 formed at the other end of the inner drum 2B, and thereafter. Is discharged through the discharge port 16B.

When the waste concrete is ground, the deformed rebar 18 which is a ground medium is the double drum 2
Random movement occurs at the bottom of the inner drum 2B, but as described above, the coarse aggregate dropping port 36 is formed only at the center of the other end surface of the inner drum 2B, and the outer edge of the inner drum 2B has an annular end plate. Since the deformed bars 18 are blocked by the end plates, the deformed bars 18 do not jump out of the inner drum 2B. Further, since the bar diameter of the deformed reinforcing bar 18 is 6 mm with respect to the mesh of 5 mm of the mesh portion 30, the deformed reinforcing bar 18 may fly out to the outer drum 2A side through the mesh of the mesh portion 30 while the inner drum 2B is rotating. Absent. The concrete waste material itself can be heated to, for example, about 300 to 500 ° C. and supplied to the double drum 2. In this case, room temperature air can be supplied instead of hot air.

In this way, the concrete waste material put into the inner drum 2B is ground by the deformed bar 18 and the net portion 3
The fine aggregate is separated into the outer drum 2A through 0 and collected from the fine aggregate chute 31 while the coarse aggregate is collected from the coarse aggregate chute 32. It is possible to simultaneously recover coarse aggregate and fine aggregate from concrete waste material with a scouring device. In particular, the fine powder flying inside the inner and outer drums 2A and 2B is blown out by the air blown from the blower pipe 10 to the outside of the double drum 2 through the suction port 33, so that when scraping concrete waste material It is possible to remove a large amount of fine powder of concrete waste material that is generated. As a result, it is possible to collect good quality coarse aggregate and fine aggregate in which fine powder does not adhere to the surface.

[0020]

As described above, according to the present invention, the solid matter put into the inner drum is rubbed with the mashing medium, and the fine components of the solid matter are separated into the outer drum through the net portion, While recovering this from the fine component recovery unit while recovering the crude solid component from the crude component recovery unit, it is possible to simultaneously recover the crude component and the fine component from the solid with one device. it can.

In particular, since the fine powder flying inside the inner drum and / or the outer drum due to the air blown from the air blower is sucked out of the drum through the suction port, the solid matter generated when the solid matter is ground Can be removed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a double drum type fraying apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a grinding medium according to an embodiment of the present invention.

[Explanation of symbols]

2 double drum, 2A outer drum, 2B inner drum, 1
0 blower pipe (blasting means), 18 deformed rebar (rubbing medium), 30 mesh part, 31 chute for fine aggregate (fine component collecting part), 32 chute for coarse aggregate (crude component collecting part), 3
3 Suction port (discharging means).

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Hashimoto, Inventor Koichi Hashimoto 1-1 1-1, Minami-cho, Yawatanishi-ku, Kitakyushu, Mitsubishi Materials Co., Ltd. Cement Development Center (72) Yusuke Nishimura Inami-cho, Hachimansai-ku, Kitakyushu, Fukuoka No. 1-1 Cement Development Center, MITSUBISHI MATERIALS CORPORATION (56) References JP-A-4-21550 (JP, A) JP-A-5-238792 (JP, A) JP-A-59-228949 (JP, A) ) JP-A-51-126559 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B02C 17/00-17/24 B02C 19/00-25/00 B09B 1/00-5 / 00

Claims (3)

(57) [Claims] 1. A double-drum type scouring device for scouring waste concrete to recover coarse components such as coarse aggregate and fine components such as fine aggregate, the axis of rotation of which is substantially horizontal. An outer drum rotatably provided inside, an inner drum housed inside the outer drum and having its rotation axis aligned with the rotation axis of the outer drum, and housed inside the inner drum. The above concrete waste
A grinding medium for grinding the material, and a mesh portion provided on the inner drum for sieving the fine component to pass through to the outer drum side and sieving so that the coarse component remains inside the inner drum, and the inside of the outer drum. A fine component collection part for collecting the fine component discharged from the inner drum, a crude component collection part for collecting the crude component discharged from the inside of the inner drum, and a hot air of 300 to 500 ° C. to the inside of the inner drum.
A blowing means that, inside and / or outside Dora of the inner drum at Surimomi
Fine powder of the above solids generated inside the drum
A double-drum type grazing device with a discharging means for discharging to the inside. 2. The grinding medium is a drum of an inner drum.
The double-drum type polishing device according to claim 1, comprising a rod material having a length of about 20% with respect to the length . 3. The discharging means for the fine powder is the inner drum.
The double-drum type polishing device according to claim 1 or 2, which is formed on the side .