Waste material crushing plant

Abstract

To provide a waste material crushing plant which consolidates crushing equipment, thereby saving space and improving maintainability.SOLUTION: An elevated platform 4 having multiple floors is erected, and crushing equipment such as an input hopper 5 for inputting waste materials, a roll crusher 7 for roughly crushing the waste materials, an impact crusher 8 for finely crushing the waste materials, and a vibrating sieve 9 for sieving the finely crushed waste materials into oversized and undersized pieces based on a predetermined particle size is mounted on each floor. In addition, each of the crushing equipment is connected to each other by transport means such as a skip elevator 10, a grizzly feeder 11, a bucket elevator 13, and a return chute 14, to construct a three-dimensional waste material crushing plant 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a waste material crushing plant that crushes waste asphalt pavement material dug up during road construction or the like into pieces of a predetermined particle size or smaller, and prepares the material in a state that can be used as a raw material for asphalt mixtures. [Background technology]

[0002] Conventionally, in order to reuse waste asphalt pavement materials (hereinafter referred to as "waste materials") dug up during road construction and the like, some asphalt mixture manufacturing plants first crush the waste materials (roughly crushed) into particles of about 200 mm or less using a primary crusher such as a roll crusher or jaw crusher, and then crush the waste materials (finely crushed) into particles of about 13 mm or less, which are normally used as materials for asphalt mixtures, using a secondary crusher such as an impact crusher. The waste materials crushed into particles of about 13 mm or less are then supplied to a waste material recycling dryer in an asphalt plant installed in the asphalt mixture manufacturing plant, heated to a specified temperature, and mixed in an arbitrary ratio with new aggregates, etc., separately heated to a specified temperature, to produce the desired asphalt mixture.

[0003] For example, Patent Document 1 discloses that within the premises of an asphalt mixture manufacturing factory where an asphalt plant is installed, in addition to a primary crusher and a secondary crusher, equipment such as a vibrating sieve that sifts the waste material finely crushed by the secondary crusher into particles of different sizes is distributed (flat), and the input and output sections of each piece of equipment are connected by a belt conveyor that is arranged at an angle.

[0004] In addition, waste materials are fed directly into the primary crusher using a shovel loader or the like. However, since the feed section of the primary crusher is located at a relatively high position, a ramp for the shovel loader or the like to ascend and descend is usually provided adjacent to the primary crusher. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication number 1-28088 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as in Patent Document 1, when the above-mentioned equipments arranged in a flat plane on the premises of an asphalt mixture manufacturing plant are connected with an inclined belt conveyor, the inclination angle of the conveyor cannot be too steep so that the waste material on the belt does not slide backwards during transportation. As a result, the conveyor becomes unavoidably long, and a relatively large installation space is required. In addition, a considerable amount of space is required to form the above-mentioned slope for the shovel loader on the premises.

[0007] On the other hand, since the asphalt mixture manufacturing plant site requires not only the installation space for the asphalt plant, but also a yard for storing the waste materials before crushing and the crushed waste materials (products), the layout is relatively subject to constraints, and in some cases, it is expected that the installation of the crushing equipment itself will be difficult. In addition, with a dispersed (flat) layout, it may be difficult for workers to keep an eye on each piece of equipment, which may be disadvantageous in terms of maintenance management.

[0008] In view of the above, an object of the present invention is to provide a waste material crushing plant which consolidates crushing equipment, thereby saving space and improving maintainability. [Means for solving the problem]

[0009] In order to solve the above problems, in the waste material crushing plant according to claim 1 of the present invention, an elevated platform having multiple floors is erected, and a hopper for inputting waste material dug up during road construction is installed on the ground floor of the elevated platform, a storage hopper for storing the waste material input from the input hopper is installed on the upper floor, a primary crusher for roughly crushing the waste material supplied from the storage hopper is installed on the middle floor, a secondary crusher for finely crushing the waste material roughly crushed by the primary crusher is installed on the lower floor, and a storage hopper for storing the waste material finely crushed by the secondary crusher is installed on the upper or middle floor. Each of the crushed waste materials is equipped with a vibrating sieve that separates the crushed waste material into oversize and undersize pieces based on a specified particle size, while the input hopper and the storage hopper are connected by a first vertical conveying device, the storage hopper and the primary crusher by a grizzly feeder, the primary crusher and the secondary crusher by a transfer conveyor, the secondary crusher and the vibrating sieve by a second vertical conveying device, and the oversize piece discharge section of the vibrating sieve and the secondary crusher by a gravity-feed return chute.

[0010] In addition, in the waste crushing plant described in claim 2 of the present invention, a grizzly under material yard for storing grizzly under material sorted and removed by the grizzly feeder, and a product yard for storing waste material finely crushed to a predetermined particle size or less are arranged on the ground adjacent to the elevated platform, and the grizzly under material discharge portion of the grizzly feeder is connected to the grizzly under material yard by a first discharge means, and the undersize discharge portion of the vibrating screen is connected to the product yard by a second discharge means.

[0011] In addition, in a waste material crushing plant according to a third aspect of the present invention, an outer peripheral surface of the elevated platform is covered with a cover member. Effect of the Invention

[0012] According to the present invention, it is possible to consolidate waste material crushing equipment, which is expected to reduce space and improve ease of maintenance. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic front view showing an embodiment of a waste material crushing plant according to the present invention. [Diagram 2] FIG. 2 is a schematic plan view of FIG. [Diagram 3] FIG. 3 is a view taken along the line AA in FIG. 2. [Figure 4] FIG. 1 is a schematic perspective view showing a state in which a waste material crushing plant according to the present invention is installed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In the waste material crushing plant of the present invention, for example, an elevated platform having a plurality of substantially flat floors (storeies) is erected within the premises of an asphalt mixture manufacturing factory in which an asphalt plant is installed.

[0015] Of the elevated platform, the ground floor is equipped with an input hopper for inputting waste material (before crushing) dug up for road construction work, the upper floor is equipped with a storage hopper for temporarily storing the waste material input from the input hopper, the middle floor is equipped with a primary crusher such as a roll crusher or jaw crusher that roughly crushes (primary crushing) the waste material supplied from the storage hopper, the lower floor is equipped with a secondary crusher such as an impact crusher that finely crushes (secondary crushing) the waste material roughly crushed by the primary crusher, and the upper or middle floor (at least the floor above the lower floor) is equipped with a vibrating sieve that sifts the waste material finely crushed by the secondary crusher into oversize and undersize based on a specified particle size (for example, a particle size of approximately 13 mm that is normally used as a material for asphalt mixtures).

[0016] Of the floors of the elevated platform, the ground floor refers to the floor located on the ground, but the others do not refer to a specific floor (e.g., the 2nd floor, the 3rd floor, etc.) but merely indicate a relative positional relationship; for example, the lower floor refers to the floor above the ground floor, the middle floor refers to the floor above the lower floor, and the upper floor refers to the floor above the middle floor.

[0017] Also, the input hopper and the storage hopper are connected by a first vertical conveying device such as a skip elevator, the storage hopper and the primary crusher are connected by a grizzly feeder, the primary crusher and the secondary crusher are connected by a transfer conveyor, the secondary crusher and the vibrating sieve are connected by a second vertical conveying device such as a bucket elevator, and the oversized portion discharge section of the vibrating sieve and the secondary crusher are connected by a gravity drop type return chute. The first vertical conveying device, the grizzly feeder, the transfer conveyor, the second vertical conveying device, and the return chute are all integrally incorporated in the elevated platform.

[0018] In addition, preferably, a grizzly under material yard for storing grizzly under material (for example, soil, sand, gravel, etc. with a particle size of approximately 40 mm or less that is mixed into waste material dug up during road construction and is used as roadbed material, etc.) sorted and removed by the grizzly feeder during waste material transportation, and a product yard for storing waste material (products) that has been finely crushed to a predetermined particle size or less are provided on the ground part adjacent to the elevated platform, and the grizzly under material discharge section of the grizzly feeder and the grizzly under material yard are connected by a first discharge means such as a belt conveyor mounted on an appropriate floor (excluding the ground floor) of the elevated platform, and the undersize discharge section of the vibrating sieve and the product yard are connected by a second discharge means such as a belt conveyor mounted on an appropriate floor (excluding the ground floor) of the elevated platform in the same manner as above.

[0019] With the above-mentioned configuration, the grizzly underwood generated during the crushing process and the waste materials (products) after crushing can be dropped and discharged directly into an adjacent storage yard and piled up by taking advantage of the height of each floor of the elevated platform on which each of the above-mentioned discharge means is mounted, without using a long belt conveyor that required a separate inclined arrangement on the ground as in conventional equipment, which further contributes to the consolidation of crushing equipment and space saving.

[0020] Furthermore, it is preferable to cover the outer periphery of the elevated platform with a cover member made of an appropriate material with excellent sound insulation and sound absorption properties, which is expected to improve dustproofing as well as soundproofing, and also to enhance the sense of unity as a general building structure, contributing not only to the consolidation but also to the improvement of the scenery, making it relatively easy to install in, for example, urban suburbs.

[0021] In this way, according to the waste crushing plant of the present invention, the crushing equipment consisting of the primary crusher, secondary crusher, vibrating screen, and the various conveying means connecting these, etc., is constructed and consolidated in a three-dimensional manner, which effectively saves space.In addition, by installing the input hopper for inputting the waste material before crushing on the ground floor, the ramp for lifting and lowering the shovel loader, etc., which was required in conventional equipment, is no longer necessary, making it relatively easy to adopt even in places with many layout constraints, such as small and medium-sized asphalt mixture manufacturing plants.

[0022] In addition, compared to the decentralized (flat) layout of conventional equipment, workers will be able to keep an eye on each piece of equipment more easily, and when workers need to check on each piece of equipment, they would be forced to take a long detour due to long conveyor belts or the like if the equipment was decentralized. However, with this new layout, workers can simply go back and forth between floors to efficiently check on each piece of equipment, which is expected to reduce the burden on workers and is also advantageous in terms of maintenance management. EXAMPLES

[0023] An embodiment of the present invention will now be described with reference to the drawings.

[0024] In the figure, 1 is a waste material crushing plant according to the present invention, and an elevated platform 4 having a plurality of substantially flat floors (floors) 3a, 3b, 3c1, 3c2, 3c3, 3d1, and 3d2 is erected within the site 2 of an asphalt mixture manufacturing factory where an asphalt plant (not shown) is installed. In the figure, 3a indicates the ground floor, 3b indicates the lower floor, 3c1 to 3c3 indicate the middle floors, and 3d1 and 3d2 indicate the upper floors.

[0025] In addition, the ground floor 3a, which is located on the ground level, is equipped with an input hopper 5 for inputting waste materials (before crushing) dug up for road construction work, the upper floor 3d1 is equipped with a storage hopper 6 for temporarily storing the waste materials input from the input hopper 5, the middle floor 3c3 is equipped with a roll crusher 7, which is a primary crusher that roughly crushes (primary crushing) the waste materials supplied from the storage hopper 6, the lower floor 3b is equipped with an impact crusher 8, which is a secondary crusher that finely crushes (secondary crushing) the waste materials roughly crushed by the roll crusher 7, and the middle floor 3c3 is equipped with a vibrating screen 9 that sieves the waste materials finely crushed by the impact crusher 8 into oversized and undersized pieces based on a specified particle size standard.

[0026] The particle size of the standard waste material is set to, for example, approximately 13 mm so that waste material (products) with a particle size of approximately 13 mm or less, which is normally used as a material for asphalt mixtures, can be sieved out as undersized material, and a sieve mesh (not shown) of the vibrating sieve 9 should be selected with a mesh size corresponding to the standard.

[0027] The input hopper 5 and the storage hopper 6 are connected by a skip elevator 10, which is a first vertical transport device, the storage hopper 6 and the roll crusher 7 are connected by a grizzly feeder 11, the roll crusher 7 and the impact crusher 8 are connected by a transfer conveyor 12 such as a belt conveyor, the impact crusher 8 and the vibrating sieve 9 are connected by a bucket elevator 13, which is a second vertical transport device, and the oversized portion discharge section 9a of the vibrating sieve 9 and the secondary crusher 8 are connected by a gravity drop type return chute 14. The skip elevator 10, grizzly feeder 11, transfer conveyor 12, bucket elevator 13, and return chute 14 are all integrally incorporated in the elevated platform 4.

[0028] The skip elevator 10 comprises a guide rail 15 spanning from the ground floor 3a to the upper floor 3d1, and a transport bucket 16 capable of running on the guide rail 15, and the transport bucket 16 can be raised and lowered along the guide rail 15 by being pulled by a wire, winch, or the like (not shown). After the transport bucket 16 is positioned below the input hopper 5 and receives waste materials, it is pulled up to the upper floor 3d1 by a wire or the like, whereby the transport bucket 16 tips over (reverses), and the waste materials in the transport bucket 16 are discharged and supplied into the storage hopper 6.

[0029] The grizzly feeder 11 is a mechanically vibrating lattice-shaped feeder that sequentially sends the waste material discharged from the storage hopper 6 on the upper floor 3d1 to the roll crusher 7 located downstream in the conveying direction by mechanical vibration, and is capable of sieving out and separating out grizzly under material G, which is mixed in with the waste material and consists of soil, sand, gravel, etc. with a particle size of approximately 40 mm or less.

[0030] The transfer conveyor 12 can be, for example, a belt conveyor, and in this embodiment, is arranged in two stages, one above the other, across the middle floors 3c2 and 3c1, so that the roughly crushed waste material discharged from the roll crusher 7 on the middle floor 3c3 can be supplied to the impact crusher 8 on the lower floor 3b via the transfer conveyor 12. Reference numeral 17 in the figure denotes a magnetic separator that attracts and removes metal pieces such as nails and wires that are impurities mixed in with the waste material flowing down on the transfer conveyor 12.

[0031] The bucket elevator 13 is a continuous vertical transport device that can lift and supply the finely crushed waste material discharged from the impact crusher 8 on the lower floor 3b to the vibrating screen 9 on the middle floor 3c3. In the figure, 18 is a belt conveyor for relaying the waste material discharged from the impact crusher 8 to the bucket elevator 13, and at the upper part of the transport path, a magnetic separator 19 for removing metal pieces is provided, as described above.

[0032] The return chute 14 is a gravity drop type chute that drops and feeds the waste material discharged from the oversized discharge portion 9a of the vibrating sieve 9 on the middle floor 3c3 into the impact crusher 8 on the lower floor 3b, where it is crushed again. Although a conveying means such as a belt conveyor can be used instead of the return chute 14, the gravity drop type chute can simplify and compact the device configuration, which is advantageous in terms of cost and maintenance, and is also expected to shorten the conveying time (improve work efficiency).

[0033] In addition, on the ground adjacent to the elevated platform 4, there are a grizzly under material yard 20 for storing grizzly under material G such as sand, soil, etc. that is sorted and removed by the grizzly feeder 11 during waste material transportation, and product yards 21a, 21b for storing waste material (product R) that has been finely crushed to a specified particle size or smaller.

[0034] The grizzly under material discharge section 11a below the grizzly feeder 11 and the grizzly under material yard 20 are connected by a relay chute 22 and a belt conveyor 23, which is a first discharge means mounted on an appropriate floor (excluding the ground floor) of the elevated platform 4. On the other hand, the undersize material discharge section 9b below the vibrating sieve 9 and the product yards 21a, 21b are connected by a belt conveyor 24, which is a second discharge means mounted on an appropriate floor (excluding the ground floor) of the elevated platform 4. Reference numeral 25 in the figure denotes a belt conveyor that can distribute the waste material (product R) discharged from the belt conveyor 24 to the two product yards 21a, 21b by switching the conveying direction.

[0035] With the above-mentioned configuration, the grissile under material G generated during the crushing process and the waste material (product R) after crushing can be dropped and discharged directly into the adjacent grissile under material yard 20 and product yards 21a, 21b and piled up by taking advantage of the height of each floor of the elevated platform 4 on which the belt conveyors 23, 24, which are the respective unloading means, are mounted, without using a long belt conveyor or the like that required a separate inclined arrangement on the ground as in conventional equipment, which further contributes to the consolidation of crushing equipment and space saving.

[0036] Reference numeral 26 in the drawing denotes a cover member made of, for example, rock wool, glass wool, or the like, which has excellent sound insulation and sound absorption properties, and which covers the outer periphery of the elevated base 4. By covering the outer periphery of the elevated base 4 with the cover member 26, it is expected that the sound insulation and dustproofing properties will be improved, and the sense of unity will be increased as if it were a building structure, which will contribute not only to the consolidation but also to the improvement of the scenery, and it will be relatively easy to adapt to the installation of crushing equipment in, for example, the suburbs of an urban area.

[0037] Although omitted in this embodiment, a dust collection system (suction fan, bag filter, etc.) for collecting dust generated during the crushing process is also installed on an appropriate floor of the elevated platform 4.

[0038] When the waste materials dug up during road construction are to be crushed in the waste material crushing plant 1, the waste materials stored in the waste material storage yard (not shown) in the factory site 2 are first scooped up by the shovel loader S and transported to the input hopper 5 provided on the ground floor 3a and input. At this time, since the input hopper 5 is installed on the ground floor 3a, the shovel loader S can easily input the waste materials while remaining on the ground, and there is no need to separately provide a slope and perform the input work while ascending the slope, as in conventional facilities, which not only saves space but is also suitable in terms of work efficiency and work safety.

[0039] The waste material fed into the feeding hopper 5 is lifted via a skip elevator 10 to a storage hopper 6 on the upper floor 3d1, where it is discharged and temporarily stored. The waste material stored in the storage hopper 6 is then sequentially sent via a grizzly feeder 11 to the roll crusher 7 on the middle floor 3c3, where it is fed while grizzly under material G such as soil and sand is sorted and removed.

[0040] At this time, the grizzly under material G selected and removed by the grizzly feeder 11 is transported to the grizzly under material yard 20 on the ground adjacent to the elevated platform 4 via the grizzly under material discharge section 11a of the grizzly feeder 11, the belt conveyor 23, etc., and is piled up and stored. On the other hand, the waste material fed into the roll crusher 7 is roughly crushed, and then fed into the impact crusher 8 on the lower floor 3b via the transfer conveyor 12, and is finely crushed to a predetermined particle size (for example, a particle size of approximately 13 mm) or less that is normally used as a material for asphalt mixtures.

[0041] The waste material finely crushed by the impact crusher 8 is lifted and fed to the vibrating sieve 9 on the middle floor 3c3 via the belt conveyor 18 and bucket elevator 13, and is sieved into oversize and undersize based on the predetermined particle size. The oversize is dropped and fed to the impact crusher 8 on the lower floor 3b via the gravity drop type return chute 14 of the vibrating sieve 9, and is finely crushed again, while the undersize (product R) is transported to the product yards 21a and 21b on the ground adjacent to the elevated platform 4 via the undersize discharge part 9b of the vibrating sieve 9 and belt conveyors 24 and 25, and is piled up and stored.

[0042] Thus, according to the waste material crushing plant 1 of the present invention, the crushing equipment consisting of the input hopper 5, storage hopper 6, roll crusher 7, impact crusher 8, vibrating screen 9, and the skip elevator 10, grizzly feeder 11, transfer conveyor 12, bucket elevator 13, return chute 14, etc., which connect these, can be constructed three-dimensionally and consolidated, thereby effectively saving space. In addition, by installing the input hopper 5 on the ground floor 3a, a ramp for the shovel loader S to ascend and descend is no longer necessary, making it possible to further save space. Furthermore, compared to the dispersed (flat) arrangement of conventional equipment, it is easier for workers to keep an eye on each piece of equipment, which is also advantageous in terms of maintenance and management.

[0043] According to the inventors' calculations, by adopting the waste material crushing plant 1 of the present invention instead of the conventional equipment, the installation area can be reduced from about 630 square meters to about 375 square meters, which is a reduction of about 40%. This makes it relatively easy to adopt even in small and medium-sized asphalt mixture manufacturing plants with layout restrictions, for example, and is also suitable because it makes it easier to secure yards for storing waste materials before crushing, grissile under material G, and waste materials after crushing (product R). [Industrial Applicability]

[0044] The present invention is not limited to crushing equipment for crushing waste asphalt pavement dug up during road construction or the like, but can also be widely applied to crushing equipment for crushing waste concrete, for example. [Explanation of symbols]

[0045] 1. Waste material crushing plant 3a…Ground floor 3b…Lower floor 3c1, 3c2, 3c3...Middle floor 3d1, 3d2...Upper floor 4...Elevated platform 5...Feed hopper 6...Storage hopper 7...Roll crusher (primary crusher) 8...Impact crusher (secondary crusher) 9...Vibrating sieve 9a...Oversized part discharge section 10...Skip elevator (first vertical transport device) 11...Grizzly feeder 12...Transport conveyor 13...Bucket elevator (second vertical transport device) 14...Return shot 20...Grizzly underwood yard 21a, 21b...Product yard 23...Belt conveyor (first discharge means) 24...Belt conveyor (second carrying means) 26…Cover member G…Grissile underwood R…Product S...Shovel loader

Claims

1. An elevated platform having a plurality of floors is erected, and a ground floor of the elevated platform is provided with an input hopper for inputting waste materials dug up during road construction work, an upper floor is provided with a storage hopper for storing the waste materials input from the input hopper, a middle floor is provided with a primary crusher for roughly crushing the waste materials supplied from the storage hopper, a lower floor is provided with a secondary crusher for finely crushing the waste materials roughly crushed by the primary crusher, and a storage unit for storing the waste materials finely crushed by the secondary crusher in an oversized state based on a predetermined particle size is provided on the upper or middle floor. a vibrating sieve that separates waste into oversized and undersized pieces, and a first vertical conveying device that connects the input hopper and the storage hopper, a grizzly feeder that connects the storage hopper and the primary crusher, a transfer conveyor that connects the primary crusher and the secondary crusher, a second vertical conveying device that connects the secondary crusher and the vibrating sieve, and a gravity-type return chute that connects the oversized piece discharge section of the vibrating sieve and the secondary crusher.

2. The waste crushing plant described in claim 1, characterized in that a grizzly under material yard for storing grizzly under material sorted and removed by the grizzly feeder and a product yard for storing waste material finely crushed to a predetermined particle size or less are arranged on the ground adjacent to the elevated platform, and the grizzly under material discharge portion of the grizzly feeder is connected to the grizzly under material yard by a first discharge means, and the undersize material discharge portion of the vibrating screen is connected to the product yard by a second discharge means.

3. 3. A waste material crushing plant according to claim 1, wherein an outer peripheral surface of said elevated platform is covered with a cover member.

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