JPH03403Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an arching prevention device for a hopper for bituminous pavement waste.

[Conventional technology]

Generally, the pavement waste that is produced when asphalt pavement is dug up is crushed and made into recycled aggregate. In this case, the above-mentioned pavement waste is aggregate (crushed stone,
sand), stone powder, asphaltic materials, etc. Therefore, these paving waste materials are crushed using a crusher or the like to form particles of 0 to 5 mm,...5 to 13 mm, or 0 to 5 mm.
After being classified into 10 mm and 10 to 20 mm, the classified recycled aggregate is mixed with new aggregate of the same type through the hopper according to the classification described above by a heating mixing device of an asphalt plant (not shown). Paving waste materials were recycled and made into composite materials.

[Problem to be solved by the invention] A hopper placed during the process after the classification,
In particular, the hopper that discharges the recycled aggregate classified into 0-5 mm or 0-10 mm into the heating mixer side of the plant has the following problems.

(1) Recycled aggregate classified into 0-5 mm or 0-10 mm as described above has a larger amount of asphalt than the aggregate itself, and is powder-like and light as a whole, so it is difficult to fall alone. As the recycled aggregates adhere to each other, an arching phenomenon (a phenomenon in which the recycled aggregates form an arch shape and harden at the bottom of the opening in the hopper) occurs in the hopper of this classification type, which causes the aggregates to bond together. This hindered the smooth supply of materials.

[Means for solving problems]

This invention solves the problems of the prior art described above, and by housing and arranging a rotating shaft equipped with a stirring means in the hopper, even if the classification type is 0 to 5 mm or 0 to 10 mm, recycled aggregate can be treated. To provide an arching prevention device for a hopper for bituminous pavement waste, which can be smoothly and quickly delivered to the next process without causing an arching phenomenon inside. The feature of this invention is that a hopper for bituminous pavement waste is equipped with a belt conveyor located directly below the distribution port on the bottom side of the opening, and a plurality of vibrators attached to at least one opposing slope among the four outer peripheral slopes. A rotary shaft connected to a drive source is horizontally suspended in the hopper located directly above the bottom of the opening, and a rotary wheel and a rotary arm are fixed on the axis of the rotary shaft at right angles to the shaft. It is in.

[Effect]

When distributing recycled aggregate classified to 0 to 5 mm into the heating mixer side of an asphalt plant through the hopper configured as described above, the rotating shaft is already operating in the hopper at the time of insertion prior to dispensing. Therefore, the recycled aggregate of the above-mentioned type charged into the hopper is stirred by the rotating wheel and rotating arm of the stirring means fitted on the axis of the rotating shaft from the beginning of the feeding. Therefore, by stirring the recycled aggregate in the hopper, it is possible to reliably prevent the arching phenomenon caused by the recycled aggregates adhering to each other in the hopper. Furthermore, since a plurality of vibrators are attached to at least one opposing slope of the hopper, the recycled aggregate in the hopper is subjected to a combined anti-arching treatment by internal stirring and external vibration. As a result, from the open bottom side of the hopper, the aggregate can be smoothly and continuously delivered to the next process side as recycled aggregate in its original form in the form of fine powder at the time of complete classification.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 3, the arching prevention device for a hopper for bituminous pavement waste material according to this invention is constructed as follows. That is, a reduced rectangular opening bottom 1a is formed below the funnel-shaped outer periphery slope portion, and the four side outer periphery slope portions are raised to a predetermined height via a flange plate protruding from the outer periphery of the opening bottom 1a. A short dispensing port 2 having the same diameter is connected in a flush manner to a position directly below the opening bottom portion 1a. A hopper 1 for bituminous pavement waste, in which horizontally circulating belt conveyors 3 are installed at slight intervals, and a plurality of vibrators 4 are attached to at least one opposing slope among the four peripheral slopes. In the hopper 1, an arching prevention device shown below is housed.

The arching prevention device described above is constructed as follows. That is, in the hopper 1, directly above the opening bottom 1a, a plurality of rotating shafts 6, 6 are horizontally suspended in a direction perpendicular to the belt conveyor 3. Both rotating shafts 6.6
is rotatably fitted into a bearing 5 disposed externally at each position. And these two rotating shafts 6,
A rotary wheel 7 having a predetermined diameter is fitted onto each shaft of the rotor 6 at intervals. In this case, a rod-shaped rotating arm 8 is integrated into each of the above-mentioned rotating wheels 7 so as to penetrate through the core thereof and protrude in the radial direction from the outer periphery of the wheel 7 at each position. . The rotating wheel 7 and rotating arm 8 described above are both fixed in a state perpendicular to the rotating shaft 6. In addition, each of the rotating arms 8 as described above is fixedly arranged on the axis of the rotating shaft 6 on each side in a state of right-angle crossing, such that when one of them is oriented in the vertical direction, the other is oriented in the left-right direction. has been done.

Next, a coupling ring 10 is connected to one end of the rotating shaft 6 on one side of the rotating shaft 6, and
Through the interposition of this coupling 10, the one rotating shaft 6 is integrally rotatably connected to a drive source 9 such as a motor mounted on the outer platform 15 on this side. In addition, both the rotating shafts 6 mentioned above,
A sprocket 11 is fitted onto each other end of the sprocket 6, and a series of chains 12 are suspended between the two sprockets 11. Therefore, when the drive source 9 described above is operated, the rotating shaft 6 on one side rotates in a direct connection, and the rotating shaft 6 on the other side rotates with the chain 1.
The rotation transmission of both sprockets 11 on which the sprocket 2 is suspended causes the sprocket to rotate in the same direction at the same speed. A locking sprocket 13 is engaged with the lower chain 12 between the two sprockets 11 in a height-adjustable manner, and the entire sprocket is constituted as an arching prevention device for a hopper for bituminous pavement waste.

When the recycled aggregate classified into 0 to 5 mm is delivered to the heating device side of a mixed material production plant (not shown) via the hopper 1 equipped with the arching prevention device configured as described above, it is carried out as follows. That is, first of all, the belt conveyor 3, vibrator 4, drive source 9
When recycled aggregate (not shown) classified into 0 to 5 mm is introduced into the hopper 1 from above while the hoppers are in operation, the recycled aggregate becomes
The rotating wheels 7 and rotating arm 8 of the rotating shafts 6, 6 already in operation within the hopper 1 provide sufficient stirring. Therefore, the above-mentioned recycled aggregate in the hopper 1 can continuously maintain the fine powder state at the time of classification due to this stirring, so that the arching phenomenon that occurs due to the recycled aggregates adhering to each other in the hopper 1 can be avoided. can be reliably prevented.

At the same time, since the plurality of vibrators 4 disposed on one opposing slope among the four sides of the hopper 1 are already in operation, the recycled aggregate (not shown) in the hopper 1 is transferred to the rotating wheel. 7 and rotary arm 8, and vibration from the external vibrator 4 at the same time. Therefore, the combined action of stirring and vibration reliably prevents the arching phenomenon at the open bottom 1a of the hopper 1, thereby ensuring complete classification from the open bottom 1a side of the hopper 1. It can be smoothly and continuously delivered to the next process as recycled aggregate in its original state in the form of fine powder.

In the embodiment described above, the rotary shaft 6 is connected to the drive source 9 so that it only rotates, but this invention is not limited to the embodiment described above. By elastically supporting the shaft 6 and simultaneously applying vibration while rotating it using a separate vibrator (not shown), the arching phenomenon can be easily and reliably prevented as in the previous embodiment.

[Efficacy of the idea]

This invention provides a hopper for bituminous pavement waste, in which a belt conveyor is arranged directly below the distribution port on the bottom side of the opening, and a plurality of vibrators are attached to at least one opposing slope among the slopes on the outer periphery of the four sides. A rotary shaft connected to a drive source is horizontally suspended in a hopper at a position, and a rotary wheel and a rotary arm are fixed on the axis of the rotary shaft perpendicularly to the shaft. It is. Therefore, since a rotating shaft with a rotating wheel and a rotating arm equipped with stirring means is housed in the hopper, even recycled aggregate with a classification of 0 to 5 mm can be smoothly and quickly processed into the next step without causing any arching phenomenon in the hopper. It is distributed to the process side, and has the effect of making it possible to manufacture composite materials with high efficiency by mixing bituminous pavement waste.

[Brief explanation of drawings]

Fig. 1 is a plan view of a hopper equipped with an anti-arching device according to this invention, and Fig. 2 is a plan view of the hopper shown in Fig. 1.
FIG. 3 is a longitudinal sectional view of the hopper taken along line A, and a front view thereof. DESCRIPTION OF SYMBOLS 1... hopper, 1a... opening bottom, 2... dispensing port, 3... belt conveyor, 4... vibrator, 6... rotating shaft, 7... rotating wheel, 8 rotating arm, 9... driving source.

Claims (1)

[Scope of utility model registration request] In a bituminous pavement waste hopper, a belt conveyor is disposed directly below the distribution port on the bottom side of the opening, and a plurality of vibrators are attached to at least one opposing slope among the four peripheral slopes, and the hopper is located directly above the bottom of the opening. A bituminous pavement waste material characterized in that a rotating shaft connected to a drive source is horizontally suspended inside the rotating shaft, and a rotating wheel and a rotating arm are fixed perpendicularly to the axis on the rotating shaft. Arching prevention device for hoppers.