JPS63255404A - Apparatus for treating asphalt waste material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to crushing asphalt waste obtained by, for example, digging up laid asphalt, sieving it to a predetermined particle size, and making it possible to reuse the asphalt waste. to the processing equipment.

[Conventional technology]

Generally, there is a method shown in FIG. 9 as a means for recycling and reusing the asphalt waste material (hereinafter simply referred to as waste material). First, large lump or plate-shaped waste materials W were brought in.
is put into a hopper 101, adhered earth and sand is removed by a machine-like vibrating sieve 102, and the material is supplied to a crusher 103 for rough crushing. A conveyor 104 carries out the earth and sand separated by the vibrating sieve Ia102. As the crusher, for example, a show crusher or the like suitable for crushing large-sized waste materials is used. Next, the crushed material is supplied to a first sieve machine 105, and after removing minute particles, it is supplied to a second crusher 107 by a first conveyor 106. This crusher crushes the crushed material into a required particle size, and for example, an impact crusher or the like is used. The crushed material finely divided by this crusher 107 is supplied to the first sieve through the machine 105 and the second sieve to the machine 108, where it is sieved into predetermined particle sizes by a plurality of sieve plates 109 and 110. , materials Wa, Wb, for each particle size,
Store as Wc.

Thereafter, the above-mentioned materials Wa, Wb, and We are mixed in a predetermined ratio, new aggregate and a predetermined amount of additive (asphalt stock solution) are added thereto, and the mixture is heated and mixed to obtain a predetermined asphalt pavement material.

[Problem that the invention seeks to solve]

Peeling the laid asphalt from the road surface requires a lot of work, so it is desirable to form it into as large a lump or a plate as possible. For this reason, it cannot be directly crushed by an impact crusher, and it is necessary to use a show crusher or the like for coarse crushing. This has problems such as requiring a large installation area, increasing equipment costs, and requiring time and effort for crushing.

Furthermore, in order for the recycled paving material to have the required hardness when used, the aggregate contained therein must have a predetermined particle size distribution. However, there is a risk that the aggregate may also be crushed during crushing by the impact crusher. Therefore, the particle size distribution differs from the particle size distribution of the initial waste material Wt, in which large aggregates decrease, fine aggregates increase, and attached asphalt is also peeled off, resulting in granular aggregates.

For this reason, a large amount of large aggregate and additives are required in the production of paving materials. However, some of the additives are attached not only to the added aggregate but also to the asphalt in the waste material, and this often becomes surplus additives, which may so-called seep out after installation.

[Means for solving problems]

In view of this point, the present invention aims to crush large waste materials into required fine pieces all at once using a single crusher. A further object of the present invention is to minimize the crushing of aggregate contained in waste materials. That is, the present invention includes a crusher for crushing asphalt waste material in the form of lumps or plates, and a sieve for sieving the crushed material sent out from the crusher, and the crusher includes a parallel pair of upper crushing rollers, and a lower part of the crusher. and a lower crushing roller arranged opposite to the upper intervening roller, and each crushing roller is equipped with a crushing blade, and the supplied waste is crushed and crushed by the pair of upper crushing rollers, and then crushed by the lower crushing roller. and one of the upper crushing rollers, and the resulting sieve is supplied to a sieve machine, and the sieve machine sieves it into predetermined particle sizes.

[For production]

The crusher uses a pair of upper crushing rollers to bite the waste material, and therefore can easily accept and crush even large-sized waste materials. Furthermore, since the crushing is performed in two stages, upper and lower, it is easy to make the material finer. Furthermore, since the crushing is performed by crushing, twisting, shearing, etc. caused by the rotation of the opposing blades, the aggregate is not subjected to impact effects and is pushed out from the cutting part, so the crushing rate is low.

〔Example〕

1 to 8 show embodiments of the present invention.

The waste material processing apparatus 1 includes a crusher 2 and a sieve 3 for sieving the crushed material delivered from the crusher. The crusher 2 includes a pair of upper left and right crushing rollers 4.5 provided in parallel, and a lower crushing roller 6 disposed below and facing the both crushing rollers. Each of these crushing rollers 4.5.6
is rotatably supported on a frame 7 with a minute interval suitable for crushing, and a hopper 8 is provided at the upper part of the frame 7.

9.10.11 is a bearing for supporting each crushing roller, 12.1
3.14 is a hydraulic motor for driving the crushing roller.

The upper crushing rollers 4.5 are each provided with a screw-shaped crushing blade 15.16. The screws of the opening and crushing blades 15 and 16 are twisted in the same direction, and one of the crushing blades 15 and 16 is twisted in the same direction. The crushing blade 16 is a single screw blade with a coarse pitch to facilitate biting of the supplied coarse material, and the other crushing blade 16 is a double screw blade with a dense pitch to improve the crushing effect.

As shown by arrows Aa and Ab, both crushing rollers 4.5 rotate in left and right directions opposite to the direction in which they bite the supplied coarse material, so the feeding direction by the screw is reversed and each crushing blade 15. 16 is the feeding direction B as shown in FIG.
An inclination or rake angle θ is formed at a and Bb.

In the figure, reference numerals 17 and 18 are return blades provided on the crushing roller 4.5, which are short and small blades formed in the shape of a screw in the opposite direction to the screws of the crushing blades 15 and 16,
The respective return blades 17,18 are provided at opposite positions. Reference numeral 19 denotes a notch provided in the crushing blade 16, which is provided as necessary to effectively catch and catch the coarse material being supplied.

The lower crushing roller 6 has a discharge port 22 formed by two screw-shaped crushing blades 20 and 21 with different pitches, and the length and width of the crushed material are regulated by the size of the discharge port 22. be.

In the figure, reference numeral 25 denotes a counter knife, which is provided opposite to the discharge side of the lower crushing roller 6, and among the coarse materials crushed and sent out by the upper and lower crushing rollers 4.5, those stored in the discharge port 22 remain as they are. Although the feed is allowed, the outlet 2
Those protruding from 2 are crushed in cooperation with the sending out of the rollers 5 and 6, and lifted up by the rotation of the upper roller 5 and crushed again.

Further, reference numeral 26 denotes an auxiliary guide, which is provided on the opposite side of the lower crushing roller 6 from the counter knife 25 and assists the coarse material following the upper crushing roller 4 to return upward with the roller 4. It is.

In the figure, 27 is a conveyor for transporting crushed materials.

For sieving, machine 3 has multiple stages, for example, three stages of sieve plates 30, 31, 32.
The upper part has a coarser grain, and the lower part has a finer grain. For example, the top sieve plate is 20! The middle row is 13mm square, and the bottom row is 5 square.
Coarse crushed materials that do not pass through the uppermost sieve plate 30 are returned to the crusher 2 via a conveyor 33. 34 and 35 are ``conveyors installed opposite to the middle sieve plate 31 and the lower sieve plate 32, respectively, and convey crushed materials that do not pass through the sieve plates; 36
is a chute that receives the crushed material that has passed through the lower sieve plate 32. As a result, the crushed material, that is, the material for recycling, is divided into fine grain material Wa, medium grain material Wb5, and granulated material c.

Note that the procedure for supplying excavated waste material W to the crusher 2 is conventional (
(see FIG. 9), and the same parts are given the same reference numerals and their explanations will be omitted.

In the above configuration, first, the lower crushing roller 6 is rotated at a relatively high speed in the direction of the arrow Ac, and then the upper crushing roller 4 is rotated at a relatively high speed.
．． 5 is indicated by arrow Aa, Ab rotates at a slower speed than the lower crushing roller 6 in the force direction.

This is to prevent crushed materials from accumulating on the lower crushing roller 6.

The excavated waste material W is supplied to a stationary sieve Wl 02 to remove adhering earth and sand, and then supplied to a crusher 2. The method of crushing by this crusher 2 will be explained based on FIG. 8.

The crushing rollers 4.5 rotate in the direction of force indicated by arrows Aa and Ab, respectively. As a result, the respective crushing blades 15, ]6 produce feed in the direction of force indicated by arrows Ba and Bb, depending on the lead angle of the screw. As a result, first use the double-edged blade 15 and I6 as shown in the figure (
Clamp the waste material W as shown in a). In this case, when the waste material W is long, a bending action is performed. Then, it is crushed as shown in FIG. 2(b). The waste material W contains large and small aggregates P, and by appropriately selecting the rotational speed of each of the crushing blades 15 and 16 and the spacing between both blades, the waste material W is crushed while being subjected to torsion and shearing action, and the bones are crushed. The material P is pushed out from the cutting position. That is, the waste material W is broken without crushing the aggregate P.

The broken pieces are then crushed again by the lower crushing roller 6 and one of the upper crushing rollers 5 in the same manner.

At this time, the crushed material W1 (see FIG. 2), which has a length extending between the screw valleys of both the upper and lower crushing rollers 5.6, is mixed in, but is cut again by providing the counter knife 25, and is removed from the discharge port 22 of the lower crushing roller 6. Only those within the height are discharged, and other materials are moved upward as the soil crushing roller 4.5 rotates, and the crushing is repeated.

The sieve of the crushed material is fed to the machine 3, where it is divided into coarse material Wa, medium material Wb, and coarse material Wc, as described above, and the crushed material larger than that is returned to the crusher 2 and recycled again. Shattered.

〔Effect of the invention〕

According to the present invention, since the supplied asphalt waste material is first bitten and crushed by the pair of upper rollers having crushing blades, it is easy to receive and crush large-sized waste materials. Furthermore, since the crushing is performed in two stages, upper and lower, crushing into fine particles can be reliably performed. Furthermore, since each crushing roller crushes and shears the waste material with the crushing blade, the aggregate contained in the waste material is separated without being subjected to the breaking action of impact etc., and therefore the particle size distribution of the aggregate contained in the crushed material is maintained to its original level. This has the advantage of being able to maintain a state similar to the aggregate particle size distribution of waste materials.

[Brief explanation of drawings]

1 to 8 are examples of the present invention;
The figure is an overall schematic explanatory diagram, the second figure is a longitudinal cross-sectional view of the crusher, and the third figure is a longitudinal cross-sectional view of the crusher.
The figure is a view along the Io-I line in Figure 2, Figure 4 is a front view of one of the upper crushing rollers, Figure 5 is a front view of the other upper crushing roller, and Figure 6 is a front view of the lower crushing roller. Front view,
FIG. 7 is an explanatory diagram of cutting of the crushing blade, FIG. 8 is an explanatory diagram of the crushing action, and FIG. 9 is a schematic explanatory diagram of a conventional asphalt waste material processing apparatus. 1 is asphalt waste processing equipment, 2 is a crusher, 3 is a sieve machine, 4.5.6 is a crushing roller, 15.16.20.2
1 is a crushing blade, and 30, 31, and 32 are sieve plates. Mouse 1 Bacteria Figure 2 Figure 3

Claims (1)

[Claims] The crusher is equipped with a crusher that crushes asphalt waste material in the form of lumps or plates, and a sieve for the crushed material sent out from the crusher. and a lower crushing roller facing the roller, each crushing roller is equipped with a crushing blade, the supplied waste material is crushed and crushed by the pair of upper crushing rollers, and then the lower crushing roller and either upper crushing roller are provided. An apparatus for processing asphalt waste material, characterized in that the asphalt waste material is crushed again by a roller, and is supplied to a sieving machine, and the sieving machine sieves it into predetermined particle sizes.