JP6422097B2 - Asphalt plant - Google Patents

Description

  The present invention relates to an asphalt plant for producing an asphalt mixture that is a road pavement material.

  In order to reuse asphalt pavement waste material (hereinafter referred to as “waste material”) excavated by road construction, etc., a vibration sieve, an aggregate storage bottle, an aggregate measuring tank, and a mixer that receive aggregate heated by an aggregate dryer In the side part of the mixing tower that is assembled in a layered manner, a recycled material storage bin that stores the recycled material heated and regenerated by the regeneration dryer and a recycled material metering tank are installed in a layered structure, Aggregate and recycled material weighed in a certain amount in an aggregate measuring tank and recycled material measuring tank are put into the mixer, mixed and adjusted while adding stone powder and asphalt, and an asphalt mixture mixed with recycled material in a predetermined ratio is prepared. Manufactured.

  Conventionally, when the recycled material discharged from the recycled material measuring tank is put into the mixer, for example, as disclosed in Patent Documents 1 and 2, the recycled material is conveyed to the mixer by a conveyor device such as a belt conveyor. Yes. By the way, since the recycled material is heated to about 160 ° C. by a recycled dryer, the contained asphalt is melted and has adhesiveness. When a bucket or trolley is used, a part of the recycled material may adhere to the conveying device and remain. Therefore, the adhesion of the recycled material is prevented by spraying or applying an oil-based solvent such as light oil, kerosene, heavy oil, etc. or an anti-adhesive agent such as mineral oil continuously or intermittently on the recycled material contact surface of the transport device. It is generally done.

JP2011-256615A Japanese Utility Model Publication No. 6-63606

  However, when petroleum-based solvent or anti-adhesive agent sprayed or applied to the recycled material contact surface of the transport device comes into contact with high-temperature recycled material, the petroleum-based solvent or anti-adhesive agent is heated to generate oil smoke or odor. In addition, when a belt conveyor is used as the conveying device, there may be a problem that the periphery of the conveying device becomes dirty due to the fall of petroleum-based solvent and adhesion preventive agent on the return side of the conveying belt, and further the recycled material.

  This invention makes it a subject to provide the asphalt plant which can manufacture an asphalt mixture efficiently, making the conveyance apparatus for conveying the recycled material in a plant unnecessary in view of said point, and keeping the inside of a plant clean. .

In order to solve the above-mentioned problems, in the asphalt plant according to claim 1 according to the present invention, a vibrating sieve, an aggregate storage bottle, an aggregate measuring tank, and a mixer that receive aggregate heated by an aggregate dryer are provided. On the side of the mixing tower that is assembled in a layered manner, a recycled material tower in which recycled material storage bins for storing the recycled material heated by the regeneration dryer and a recycled material measuring tank are assembled in a hierarchical manner is installed. in asphalt plant aggregate and recycled materials are paid out with product measuring tank from recycled material measuring tank was put into a mixer of the one group to produce the asphalt mixture, and arranged close to the mixer to regrind tower side, and arranged to re-green wood measuring tank and aggregate measuring tank directly on the mixer, recycled materials storage bin directly above the recycled material measuring tank arranged, the adhesive to be paid out the recycled material storage bins or al To While configured to be introduced in free-fall recycled materials to lower the recycled material measuring tank and the mixer to form a bent portion which is bent toward the bottom of the aggregate storage bin in the aggregate measuring tank, the A bending gate is provided at the tip of the bent portion, the discharged portion faces the upper opening of the aggregate measuring tank, and the aggregate filled up to the bent portion of the aggregate storage bin is filled with the lower aggregate measuring tank and mixer. It is characterized in that it is configured to be put into the inside .

Further, in the asphalt plant according to claim 2 , the side walls facing the recycled material measuring tank and the aggregate measuring tank arranged side by side immediately above the mixer are substantially vertical, and the discharge portion and the bone of the recycled material measuring tank The discharge portion of the material measuring tank is eccentric to the center side of the mixer .

  Furthermore, in the asphalt plant according to claim 3, the recycled dryer is assembled and disposed above the recycled material storage bin, and the recycled material discharged from the recycled dryer is dropped into the recycled material storage bin. It is characterized by.

  Furthermore, the asphalt plant according to claim 4 is characterized in that a mixing tower and a recycled material tower assembled in a hierarchical manner are incorporated on a common elevated platform so as to have a common floor.

According to the asphalt plant of the first aspect of the present invention, in the asphalt plant for producing an asphalt mixture by introducing the aggregate and the recycled material into the one mixer, the mixer is brought closer to the recycled material tower side. Te disposed, side by side again green wood measuring tank and aggregate measuring tank directly on the mixer is disposed, recycled materials storage bin directly above the recycled material measuring tank arranged, are paid out said reproduction material storage bins or al while it configured to be introduced in free-fall from recycled materials having adhesiveness to the lower regrind measuring tank and the mixer, forming a bent portion which is bent toward the bottom of the aggregate storage bin in the aggregate measuring tank The bent portion is provided with a discharge gate, the discharge portion faces the upper opening of the aggregate measuring tank, and the aggregate filled up to the bent portion of the aggregate storage bin is used to measure the lower aggregate. Put into the tank and mixer Since a configuration, it is no dirty neighborhood conveying device as in the conventional transport apparatus becomes unnecessary for conveying the recycled material to a mixer. In addition, if the recycled material discharged from the recycled material storage bin is dropped into the lower mixer, the periphery of the discharge part can be easily covered with a cover body, and oil smoke and odor can be leaked to the outside. The plant can be kept clean. Furthermore, by dropping the recycled material, it can be quickly supplied into the mixer, and an asphalt mixture can be produced efficiently. Furthermore, the aggregate can be quickly supplied from the aggregate storage bin to the aggregate measuring tank, and from the aggregate measuring tank to the mixer, so that the asphalt mixture can be produced efficiently.

Moreover, according to the asphalt plant of claim 2 , the side walls facing the reclaimed material measuring tank and the aggregate measuring tank arranged side by side immediately above the mixer are substantially vertical, and the discharge portion of the reclaimed material measuring tank In addition, since the discharge portion of the aggregate measuring tank is eccentric to the center side of the mixer , the recycled material and the aggregate can be dropped into a suitable position on the center side in the mixer, and the asphalt mixture can be manufactured efficiently.

  According to the asphalt plant of claim 3, the recycled dryer is assembled and disposed above the recycled material storage bin, and the recycled material discharged from the recycled dryer is dropped into the recycled material storage bin. This eliminates the need for a transport device that transports recycled materials from the recycled dryer into the recycled material storage bins, so that the surroundings are not contaminated, and oil smoke and odors are not leaked to the outside. Can keep.

  Moreover, according to the asphalt plant of claim 4, since the mixing tower and the recycled material tower assembled in a hierarchy are assembled on the common elevated platform so as to have the common floor, Therefore, it is easy to position the mixer and to arrange the mixing tower and the recycled material tower.

It is a schematic explanatory drawing which shows embodiment of the asphalt plant which concerns on this invention. It is the perspective view which abbreviate | omitted a part of aggregate storage bin of FIG. It is a figure equivalent to FIG. 1 which shows a reference example . It is a figure equivalent to FIG. 1 which shows another embodiment.

  An asphalt plant according to the present invention includes a mixing tower comprising a vibration sieve, an aggregate storage bin, an aggregate weighing tank, and a mixer assembled in a layered manner, and a recycled material storage bin and a recycled material weighing tank for storing the recycled material. A recycled material tower assembled in the shape of an aggregate, and the aggregate and recycled material discharged from the recycled material measuring tank and the recycled material metering tank are put into a mixer and mixed. In order to keep the inside of the plant clean without the need for a transport device for transporting recycled material to the mixer, the mixer is placed close to the recycled material tower side, and a recycled material metering tank is placed directly above the mixer. On the other hand, a recycled material storage bin is disposed immediately above the recycled material measuring tank so that the recycled material discharged from the recycled material storage bin can be dropped into the mixer by falling under its own weight.

  The mixer may be disposed so as to be incorporated in the lower part of the recycled material storage bin and the recycled material measuring tank of the recycled material tower. The lower the position of the base end of the discharge chute that guides the aggregate on the mixing tower side to the mixer by falling under its own weight, the more it is decentered to the side and the mixer is placed closer to the mixing tower side. As a result, the height of the mixing tower itself including the aggregate storage bin and the aggregate weighing tank is also advantageously reduced.

  In addition, the aggregate storage bin and the aggregate measuring tank may be incorporated in a hierarchy in the mixing tower, but in order to efficiently produce the asphalt mixture, the aggregate measuring tank is arranged near the recycled material tower side. It is good to set it as the structure which arrange | positions in parallel with the recycled material measurement tank immediately above, and will be rapidly thrown in in a mixer by fall of its own weight, if it will be aggregate discharge from this aggregate measurement tank. Further, the aggregate storage bin is configured to bend the lower part thereof so that the discharge portion at the lower end faces the upper opening of the aggregate measurement tank, and the aggregate to the bent part at the lower part of the aggregate storage bin directly above the aggregate measurement tank. It is preferable that the aggregate is quickly dropped into the aggregate measuring tank if aggregate is discharged.

  Further, the recycled dryer is assembled and arranged above the recycled material storage bin from the ground, and the recycled material discharged from the recycled dryer is dropped into the recycled material storage bin, and the adhesive is heated by heating in the recycled dryer. It is preferable that the waste material that has the above can be thrown into the mixer by its own weight drop without using a transport device.

  Furthermore, the mixing tower and the recycled material tower assembled in a hierarchy are assembled on a common elevated platform to have a shared floor, and the mixer is positioned on the shared floor, in the mixing tower and in the recycled material tower. It is desirable that the arrangement of each component device such as a storage bin and a measuring tank can be easily made and manufactured, and that the cost can be reduced by reducing the number of exterior materials and steel materials.

  In this way, the recycled material measuring tank and the recycled material storage bin are arranged immediately above the mixer arranged close to the recycled material tower side, and the recycled material discharged from the recycled material storage bin is dropped into the mixer by its own weight fall. Since it was set as the structure, the conveyance apparatus which becomes the cause of generation | occurrence | production of oil smoke and an odor, and the periphery dirt can be made unnecessary, and the inside of a plant can be kept clean. Also, the aggregate measuring tank is arranged directly above the mixer along with the recycled material measuring tank, and the lower part of the aggregate storage bin is bent so that the lower end discharge portion faces the upper opening of the aggregate measuring tank. As a result, it is possible to quickly supply the aggregate into the mixer as in the conventional case even if the mixer that has been incorporated in the mixing tower is placed closer to the recycled material tower side, and with an asphalt mixture that does not mix the recycled material. Even if it exists, it can manufacture efficiently.

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

  In the figure, reference numeral 1 denotes a plant body of an asphalt plant that manufactures an asphalt mixture that is a road pavement material. The vibrating screen 4 screens the aggregate lifted by the vertical conveying device 3 after being heated and dried by the aggregate dryer 2. An aggregate storage bin 5 for storing the screened aggregate according to particle size, an aggregate measuring tank 6 for accumulating the aggregate according to particle size, and a mixer 7 for mixing the materials weighed in a predetermined amount in each measuring tank Are recycled to the side of the mixing tower 8 that is assembled in a layered manner. Recycled material storage bin 11 for storing and recycled material weighing tank 12 for weighing recycled material are installed in a recycled material tower 13, and aggregate and recycled material can be mixed by mixer 7. Yes.

  As shown in FIG. 1, the mixing tower 8 and the recycled material tower 13 are integrated on a common elevated platform 14 so as to have a common floor 15 and can be moved up and down on a staircase 16. . The mixer 7 is arranged close to the recycled material tower 13 on the common floor 15, and the aggregate measuring tank 6 is arranged directly above the mixer 7 along with the recycled material measuring tank 12, and is placed in each measuring tank. The recycled material and the aggregate measured in this manner can be dropped into the mixer 7. Further, a recycled material storage bin 11 is disposed immediately above the recycled material measuring tank 12, a recycled dryer 10 is further disposed above the recycled material storage bin 11, and the recycled material discharged from the recycled dryer 10 is recycled material storage bin 11. In addition, the mixer can be put into the mixer by dropping its own weight via the recycling material measuring tank 12.

  The arrangement position of the mixer 7 is arranged directly below the recycled material storage bin 11 and the recycled material measuring tank 12 so that the vertical center lines of the recycled material storage bin 11, the recycled material measuring tank 12 and the mixer 7 coincide with each other. However, in FIG. 1, the discharge part 11a provided with the discharge gate of the recycled material storage bin 11 is eccentric to the mixing tower 8 side, and the discharge part 12a provided with the discharge gate of the recycled material measuring tank 12 is also mixed. Eccentricity is made toward the tower 8 side, and the arrangement of the mixer 7 is made closer to the mixing tower 8 side so that the aggregate in the aggregate storage bin 5 can be easily fed.

  In addition, the aggregate measuring tank 6 and the recycled material measuring tank 12 are arranged side by side immediately above the mixer 7 as described above. However, the opposing side wall surfaces of the respective tanks are substantially vertical, and the discharge section of the aggregate measuring tank 6 is used. Each of 6a and the discharge part 12a of the recycled material measuring tank 12 is eccentric to the center side of the mixer 7 so that it can be dropped into a suitable position in the mixer 7.

  Further, as shown in FIG. 2, the lower part of the aggregate storage bin 5 forms a bent portion 5e bent at an inclination angle so that the aggregate flows smoothly, and discharge gates 17a, 17b provided for each compartment. The lower openings of the discharge portions 5a, 5b, 5c, and 5d provided with 17c and 17d face the upper opening of the aggregate measuring tank 6, and the aggregate stored according to the particle size for each compartment is discharged to the discharge gates 17a, 17b, 17c and 17d are controlled to open and close, and are dispensed into the aggregate measuring tank 6 for cumulative measurement.

  Further, the discharge part 11a of the recycled material storage bin 11, the discharge part 12a of the recycled material measuring tank 12, the discharge parts 5a, 5b, 5c, and 5d of the aggregate storage bin 5, and the discharge part 6a of the aggregate measuring tank 6 are discharged. The periphery of the gate is covered with a cover body (not shown) such as a bellows, so that the smoke and odor from the recycled material and the dust from the aggregate are prevented from scattering to the outside.

  And when manufacturing an asphalt mixture, first, the aggregate heated with the aggregate dryer 2 is sent to the vibration sieve 4 of the upper part of the mixing tower 8 with the vertical conveying apparatus 3, and is stored in the aggregate storage bin 5 according to particle size. Then, the waste material is supplied to the regeneration dryer 10 above the regeneration material tower 13 by the vertical conveyance device 9 and is heated and regenerated, and the regenerated material having adhesiveness is stored in the regeneration material storage bin 11.

  At this time, the aggregate is filled up to the bent portion 5e of the aggregate storage bin 5, and the aggregate is quickly put into the aggregate measuring tank 6 by opening the discharge gates 17a, 17b, 17c, 17d, and the cumulative measurement is performed. It is dropped into the lower mixer 7 later. In parallel with the above, according to the mixing ratio of the recycled material of the asphalt mixture to be manufactured, the recycled material stored in the recycled material storage bin 11 is discharged to the lower recycled material measuring tank 12 and weighed, and a predetermined amount After weighing, the mixture is dropped into the lower mixer 7 and mixed and adjusted while adding asphalt or the like to produce an asphalt mixture in which a recycled material is mixed in a predetermined ratio.

  In addition, when manufacturing the asphalt mixture which does not mix a recycled material, since the aggregate is filled up to the bending part 5e of the aggregate storage bin 5 of the upper layer of the aggregate measurement tank 6, the aggregate is removed from the aggregate storage bin 5. When it is dispensed, it is immediately put into the aggregate weighing tank 6 due to its own weight drop, and the aggregate weighed in the aggregate weighing tank 6 is also quickly put into the lower mixer 7 for its own weight fall. Asphalt mixture can be manufactured with the same manufacturing capability as the mixing tower.

  As described above, in the asphalt plant having the above-described configuration, the recycled material having adhesiveness due to the heating in the recycled dryer 10 is successively put into the recycled material storage bin 11, the recycled material measuring tank 12, and the mixer 7 due to its own weight drop. As a result, a transport device for transporting the recycled material is not required, and the inside of the plant is not contaminated as in the prior art. Moreover, even if the asphalt mixture which does not mix | blend a recycled material or mixes is manufactured, compared with the conventional asphalt plant, the manufacturing capability comparable with the conventional asphalt plant can be exhibited.

FIG. 3 shows a reference example of the present invention. Parts having the same structure as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted. In this reference example , the lower part of the aggregate storage bin 5 is not bent, and the aggregate measuring tank 6 is disposed immediately below the discharge part 5a of the aggregate storage bin 5 and is inclined below the aggregate measuring tank 6. The discharged chute 17 is disposed, the lower end thereof faces the upper opening of the mixer 7, and the aggregate measured in the aggregate measuring tank 6 is poured into the mixer 7 while flowing down the discharge chute 17. As described above, when the discharge chute 17 is made to flow down after the measurement, the charging time becomes longer and the height of the mixing tower 8 must be increased. However, the aggregate storage bin 5 and the aggregate measuring tank 6 of the mixing tower 8 are required. There is a merit that can be manufactured without changing the basic structure of.

  FIG. 4 shows still another embodiment of the present invention. In the present embodiment, the recycled dryer 10 is of a type installed on the ground, and the recycled material tower 13 in which the large recycled material storage bin 11 is incorporated in the elevated platform 14b is located near the elevated platform 14a on the mixing tower 8 side. The recycled material that has been installed and heated by the recycled dryer 10 is conveyed by a vertical conveying device 9 ′ such as a skip elevator and put into the recycled material storage bin 11. As described above, when it is required to install the large recycled material storage bin 11, there is a case where the recycled dryer 10 is installed on the ground and the vertical conveying device is used, but the mixing tower 8 and the recycled material tower 13 are sometimes used. Even if it is covered with an exterior material, it does not generate oily smoke or odor in the plant, and it will not become dirty.

  In the embodiment shown in FIG. 4, the elevated platform 14 a of the mixing tower 8 and the elevated platform 14 b on the recycled material tower 13 side are installed independently. In the embodiment shown in FIGS. Although a stand is adopted, it may be selected appropriately according to the ease of design according to the installation of a new plant or the expansion of an existing plant, the production price, etc., within the scope not departing from the gist of the present invention. Of course, various changes can be made.

DESCRIPTION OF SYMBOLS 1 ... Plant main body 2 ... Aggregate dryer 5 ... Aggregate storage bin 5e ... Bending part (aggregate storage bin)
6 ... Aggregate measuring tank 7 ... Mixer 8 ... Mixing tower 10 ... Recycled material dryer 11 ... Recycled material storage bin 12 ... Recycled material measuring tank 13 ... Recycled material towers 14, 14a, 14b ... Elevated platform 15 ... Shared floor

Claims (4)

Recycled material heated with a regenerative dryer is placed on the side of a mixing tower that is composed of a vibration sieve, an aggregate storage bin, an aggregate weighing tank, and a mixer that receive the aggregate heated by the aggregate dryer. A recycled material tower is constructed by assembling recycled material storage bins and recycled material measuring tanks to be stored in a hierarchical manner, and the aggregate and recycled material discharged from the aggregate measuring tank and the recycled material measuring tank are mixed into the one mixer. in asphalt plant turned to the production of asphalt mixture within, said mixer was closer to regrind tower side arranged, and arranged to re-green wood measuring tank and aggregate measuring tank directly on the mixer, the reproduction recycled materials storage bin just above the wood measuring tank arranged, a configuration to be introduced in free-fall from recycled materials having adhesiveness to be paid out the recycled material storage bins or found in the lower regrind measuring tank and the mixer on the other hand A bent portion is formed by bending the lower portion of the aggregate storage bin toward the aggregate measuring tank, and a discharge gate is provided at the tip of the bent portion, and the discharge portion faces the upper opening of the aggregate measuring tank. The asphalt plant is characterized in that the aggregate filled up to the bent portion of the aggregate storage bin is put into a lower aggregate measuring tank and mixer . The reclaimed material measuring tank and the aggregate measuring tank, which are arranged side by side immediately above the mixer, are substantially perpendicular to each other, and the discharge part of the recycled material measuring tank and the discharge part of the aggregate measuring tank are arranged at the center of the mixer. The asphalt plant according to claim 1, wherein the asphalt plant is eccentric to the side .   3. The configuration according to claim 1, wherein the recycled dryer is assembled and disposed above the recycled material storage bin, and the recycled material discharged from the recycled dryer is dropped into the recycled material storage bin. Asphalt plant.   The asphalt plant according to any one of claims 1 to 3, wherein the mixing tower and the recycled material tower assembled in a hierarchy are assembled on a common elevated platform so as to have a common floor.

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