JP2007090323A - Pulverizing apparatus and pulverizing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulverizing apparatus which is equipped with a novel crushing mechanism (a crushing means) and which is suitable for production of recycled soil (improved soil). <P>SOLUTION: The pulverizing apparatus is equipped with a pulverizing tower and a pulverizing means arranged inside the crushing tower. The pulverizing tower 11 is equipped with a matter to be pulverized charging port 134 at an eccentric position of a ceiling section and an pulverized matter discharging port 144 at a bottom side. The pulverizing means is constituted of one or a plurality of rotary planar bodies 152 for centrifugally releasing the matter to be pulverized (a raw material), a vertical reflecting wall surface 121 for reflecting the centrifugally released matter to be pulverized in an inside direction and a plurality of pulverizing chains 153, each of which is made of a rigid body, hangs inside the reflecting wall surface with a lower end as a free end and can pivot. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crushing apparatus and method having a novel configuration. In particular, the present invention relates to a pulverizing apparatus and method suitable for residual soil regeneration.

  Here, a case where the remaining soil is regenerated is described as an example. The pulverizing apparatus and method of the present invention are particularly suitable for pulverizing clay soil blocks such as residual soil, but can also be applied to pulverizing hard materials other than residual soil, such as ceramics and shells.

  In recent years, disposal of residual soil generated in large quantities as a construction by-product has become a social problem.

  Large amounts of excavated residual soil (concrete blocks including concrete blocks) are generated at construction sites such as cultivating land in fields, road repairs, water and sewage systems, gas piping work, and electrical work.

  Traditionally, most of the remaining soil has been dumped in the landfill. However, the disposal unit price has risen with the bottom payment of the disposal site, and illegal dumping has become common.

  On the other hand, at the new construction site, newly collected mountain sand was used as the earth and sand to be backfilled. And the places where mountain sand can be collected are limited from the viewpoint of protecting the natural environment, and it has become difficult to secure the mountain sand collection place near the construction site. For this reason, the problem of mountain sand quality deterioration or unit price increase has become a problem, as well as traffic pollution associated with remote sampling sites and construction sites.

  Therefore, it is required to regenerate the remaining soil generated at the construction site, etc., to effectively use the remaining soil as a backfill material (improved soil), etc., and to reduce the disposal ratio of the discarded soil.

  That is, among the remaining soil, good quality can be collected separately and used as backfill soil as it is. In the residual soil after the separation, foreign matters such as metal pieces and large stone blocks (for example, 200 mm or more) are mixed, and further, clay blocks that cannot be used as they are from the viewpoint of particle size and strength are mixed. For this reason, the modified material (lime or cement) is mixed into the metal pieces and large stone blocks that have been separated and removed, and sieved to obtain primary reclaimed soil (improved soil). The clay block) was pulverized into secondary recycled soil (improved soil) (see <Conventional Technology> in Patent Documents 1 and 2).

  In addition, the relevant agencies in the country have set three goals of “control of occurrence”, “promotion of reuse”, and “thorough proper disposal” of construction by-products. ing.

  The applicants of the present application have previously proposed an improved soil manufacturing machine and a manufacturing plant in Patent Documents 1 and 2 that can manufacture the improved soil at a compact and inexpensive cost.

Although not affecting the patentability of the present invention, the technical idea of using a chain with both ends fixed (stretched) as a crushing mechanism in a general garbage crushing and drying sorter is described in Patent Document 3. Has been.
JP 2002-294742 A (see abstract, etc.) Japanese Patent Laid-Open No. 2002-346422 (see abstract, etc.) Japanese Patent Laid-Open No. 2000-263028 (see claim 5, FIG. 6 etc.)

  An object of the present invention is to provide a pulverization apparatus and method suitable for the production of reclaimed soil (improved soil) having a novel crushing mechanism (crushing means) that is not disclosed or suggested in the prior art. Objective).

  One aspect of the present invention solves the above problem by the following configuration.

A crushing tower, and crushing means disposed inside the crushing tower,
The crushing tower is provided with a crushed material inlet at an eccentric position of the ceiling, and a crushed product outlet at the bottom side,
The pulverizing means includes a rotating plate-like body for centrifugally discharging the pulverized material (raw material), a vertical reflecting wall surface for reflecting the centrifugally discharged crushed material in an inner direction, and a suspended lower end on the inner side of the vertical reflecting wall surface. And a plurality of grind chains made of a rigid body that can be turned.

  Here, “hanging down” means not only the case of the free end of the lower end, but also the state where the lower end is constrained (fixed) and there is a slack and it can bulge outward by centrifugal force during turning. Shall be included (the same shall apply hereinafter).

  In the present invention, the crushed material that is released by the centrifugal force of the rotating plate-like body and collides with the reflecting wall surface and reflects (bounces back) rotates simultaneously with the rotating plate-like body. By colliding with a chain that moves circumferentially with its lower end widened, a clay mass or stone mass in a predetermined particle size range is efficiently crushed.

  The reason for this is that when the crushed material and the chain collide, the chain rotates at a considerable speed in the circumferential direction, so that a force acts in the direction intersecting the reflected clay mass, and a shearing force or compressive force is generated along with the impact force. Presumed to work. Furthermore, the chain is held loosely at the lower end of the lower end or acts to escape against excessive drag and bite into weaker parts (grain boundaries) of the mass (clay mass). Therefore, a lump body having a grain boundary bonding such as clay can be pulverized with good energy efficiency. As a result, since excessive drag does not act on the chain, wear and breakage of the crushing means (crushing blade) are reduced, the service life (replacement period) of the crushing means is increased, and maintenance is facilitated.

  The said structure WHEREIN: The upper surface of the said rotation disk can be made into an umbrella shape. By using the umbrella shape, not only the crushing chain swirling in a substantially horizontal direction and the crushing material reflected in the reflecting wall as described above, but also the crushing material released in an oblique direction by centrifugal force intersects the crushing chain. Then, it is pulverized in the same manner as described above.

  In the above-described configuration, it is desirable that the pulverizing unit is arranged in two or more stages (two sets) in the vertical direction as a set of the pulverizing chain and the rotating plate-like body. This is because it is difficult to obtain a pulverized material having a sufficiently uniform particle diameter in one stage.

  In each of the above-described configurations, a belt-like lateral reflection wall surface that protrudes in a horizontal direction or obliquely downward from the longitudinal reflection wall surface at a position below the rotating plate-like body may be provided. By providing a laterally reflecting wall surface, the crushed material traveling from the diagonally upward direction toward the longitudinally reflecting wall surface is reflected obliquely upward (bounces back) on the laterally reflecting wall surface, and collides with other crushed materials and the grinding chain again. And it becomes easy to obtain a crushed product having a uniform particle size.

  In the present invention, the crushing chain can be configured to be attached to the rotating plate-like body. In the case of this configuration, the structure is simple.

  On the other hand, the crushing chain may be configured to be attached to a turning means separate from the rotating plate-like body. In this configuration, the structure is complicated, but if the rotation (turning) drive is a separate system, the turning speed of the crushing chain and the turning speed of the rotating plate-like body are different, or the rotation is reversed. Can be. That is, it is possible to set an optimal rotating plate-like body and a turning speed according to the crushed material.

  Further, a chain case of a pulverized chain is disposed directly under the rotating plate-like body, and one or more chain hooks are provided on the peripheral back surface of the rotating plate-like body or the tip of a separate turning means, and the chain hook And a ring (ring) of the crushing chain having a length exceeding the length of the swivel part (preferably an integer multiple) is engaged so that the surplus part of the crushing chain can be stored in the chain case. Is desirable.

  Easy to attach and remove the grinding chain. For this reason, in the event that the crushing part (crushing part) of the crushing chain breaks due to wear or the like, the required number of engagement rings to the hook of the crushing chain is shifted to restore the revolving part to the set length (restoration). ).

  A configuration when the technical idea of the pulverizing apparatus of the present invention is a method invention is as follows.

  A method for crushing a hard material, in which a raw material (crushed material) is dropped onto an eccentric portion on the upper surface of a rotating plate-like body that rotates at high speed, and the outer periphery of the rotating plate-like object is moved outward by the rotational centrifugal force of the rotating plate-like object. The lower end free end that is released, reflects the crushed material in the direction of the rotating plate-like body by the longitudinally reflecting wall surface arranged outside the periphery of the rotating plate-like body, and hangs down at the inner position of the vertically reflecting wall surface. It is characterized by colliding with a rigid chain and crushing.

  Further, when the pulverization method having the above-described configuration is applied to the residual soil regeneration process, the following configuration is obtained.

A method for reclaiming residual soil,
1) A pretreatment step of removing metal pieces and rocks having a predetermined diameter or more from the remaining soil, and mixing a predetermined amount of lime with the remaining soil;
2) The pretreated residual soil that has passed through the pretreatment step is sieved with a sieve having a predetermined mesh arranged in two stages, upper and lower, and the upper sieve is used as waste residual soil, and the lower sieve is used as primary recycled soil. Primary reclaimed soil collection process to collect,
3) The crushed material on the lower sieving generated by sieving in the primary reclaimed soil recovery step is dropped into the eccentric part on the upper surface of the rotating plate that rotates at high speed, and the rotating plate It is released to the outside of the periphery of the rotating plate by the rotational centrifugal force of the body, and the crushed material is reflected in the direction of the rotating plate by the longitudinal reflecting wall arranged outside the periphery of the rotating plate. A secondary reclaimed soil recovery step of obtaining a crushed product by colliding with a rigid pulverized chain that hangs down at the inner position of the wall surface and pulverizing, and recovering the crushed product as a secondary reclaimed soil,
A method for reclaiming residual soil, comprising the steps of:

  Hereinafter, a case where the crushing apparatus according to the embodiment of the present invention is applied to a method for treating residual soil will be described as an example.

  FIG. 1 shows a schematic diagram of a residual soil treatment plant 1 for explaining the residual soil treatment method of the present invention. In addition, FIG. 1 is a thing which passed through the pre-processing which removes the metal piece which is a foreign material, a stone block and a concrete block more than predetermined diameter from a residual soil, and mixes a predetermined amount of lime with this residual soil as above-mentioned (pre-processed residual soil). It is a plant figure after processing.

  In the illustrated example, the residual soil treatment plant 1 includes a sieving machine 5 and a pulverizing apparatus 10, and the intermediate size of a predetermined range sieved by the sieving machine 5 is between the sieving machine 5 and the pulverizing apparatus 10. The crushed material (crushed material) is connected by the crushed material transporting device 7 for transporting to the raw material charging port 134 of the pulverizing device 10.

  Note that the pretreated residual soil can be continuously or intermittently charged into the raw material charging port 51 of the sieving machine 5 by the pretreated residual soil conveying device 4 such as a belt conveyor.

  The sieving machine 5 has a two-stage configuration of upper and lower sieving (not shown). The upper sieving removes nodules having a predetermined particle size or more as waste residual soil G0, and the lower sieving does not exceed the predetermined particle size. Fine particles are recovered as improved soil (primary reclaimed soil) G1, and the top of the sieve in the predetermined range of the lower screen is used as a crushed material, which can be carried into the crushed material conveying device 7. Here, the openings of the upper screen and the lower screen vary depending on the type of the remaining soil, but are appropriately set in the range of, for example, the upper screen: 100 to 200 mm and the lower screen: 20 to 60 mm. Further, the type of the sieving machine 5 is not particularly limited as long as it is suitable for the classification of the particle diameters thereof, but is usually a vibration sieve. The motion type of the vibration sieve is not particularly limited, but a general inclined circular motion type is used.

  The sieving machine 5 is provided with a discharge chute 51, and the upper sieving sieve is accumulated as waste residual soil G0, and the lower sieving sieving is directly below the sieving machine as primary reclaimed soil ( Improved soil) G1 is structured to be accumulated by free fall. In the figure, 6 is a vibration motor.

  Moreover, although each conveying apparatus 4 and 7 is a belt conveyor in the example of a figure, a screw conveyor, a vibration conveyor, a bucket conveyor, etc. are arbitrary. It can select according to the characteristic of each conveyance raw material.

  Next, an example of the pulverizing apparatus 10 will be described in detail with reference to FIGS.

  The pulverizing apparatus 10 includes a pulverizing tower 11 and pulverizing means 15 arranged inside the pulverizing tower 11. In the illustrated example, the crushing tower 11 is installed on the apparatus base 20 so that a crushed product discharge hopper 145 (to be described later) is disposed on the lower surface so that the crushed product (secondary reclaimed soil) can be collected.

  The crushing tower 10 is provided with a crushing material inlet 134 at an eccentric position of the ceiling, and a crushed product outlet 144 on the bottom side.

  In the example shown in the figure, the crushing material inlet 134 is formed with a cut circular opening by cutting off a part of the ceiling wall surface 13 of the crushing tower 10. The upper side of the crushing material inlet 134 is covered with a charging port covering wall 131 from the ceiling wall surface 13 so that the carry-out end 71 of the belt conveyor (crushed material conveying device) 7 faces.

  The crushed product discharge port 144 is formed by a lower end opening of a discharge hopper 145 attached to the bottom side.

  The pulverizing means includes a rotating plate-like body 152 that centrifugally discharges the crushed material (raw material), a longitudinally reflecting wall 121 that reflects (bounces back) the crushed material that has been centrifugally released, and an inner side of the longitudinally reflecting wall 121. And a plurality of crushed chains 153 made of a rigid body that can be swung as a free end at the lower end. In addition, even if it does not make it a lower end free end, the structure which can bulge outward by a centrifugal force at the time of turning can also be provided by having the lower end of the crushing chain 153 bound (fixed) with a slack.

  In the illustrated example, a plurality of pulverizing chains 153 are arranged in a plurality of stages (three stages in the illustrated example) in the vertical direction as a set of four crushed chains 153 attached to the lower surface of the periphery of the rotating plate 152 at a predetermined pitch. Yes. Here, the number of crushing chains 153 attached to one rotating plate-like body 152 is not limited to four, and may be three or five or more. The material of the grinding chain is usually made of steel, but is not limited to steel as long as it is made of a rigid body, and may be ceramic or the like.

  Here, the arrangement interval (vertical distance) of the rotary plate-like body 152 may be the same or different. Further, the number of sets of the rotary plate-like body 152 / grinding chain 153 is not limited to three as shown in the figure, and may be one or two or four or more.

  The rotary plate-like body 152 to which the pulverizing chain 153 is attached is attached to the rotary shaft 17 that is forcibly driven via a sleeve 151 that rotates integrally with the rotary shaft 17. The rotary shaft 17 is thrust supported by an upper bearing portion 18 supported by the ceiling wall 13 of the crushing tower 11 and a lower bearing portion 19 supported by a spoke structure 143 on the bottom side of the crushing tower 11. The rotary shaft 17 is rotationally driven by an output shaft of an electric motor (prime mover) 16 and a transmission device 163 such as belt transmission. Reference numeral 132 denotes a transmission device cover. The transmission device 163 is a belt transmission in the illustrated example, but is optional such as a chain transmission or a gear transmission.

  Here, it is desirable that the rotational speed of the prime mover 16 be variable via a transmission or the like because the rotational speed can be changed in accordance with the characteristics of the crushed material and the unit time processing amount.

  In the example shown in the drawing, the rotating plate-like body 152 has a ring body 152a having a predetermined width attached to a sleeve 151 that rotates integrally with the rotating shaft 17 via a square plate 152b. It may be a sheet. Further, as shown in FIG. 3, the diameter of each rotary plate may be changed.

  Further, the rotating plate-like body 152 is not limited to a disc, and may be any shape such as a regular polygon or an ellipse. In the case of an ellipse, it is attached to the rotary shaft 17 so that a gap is not formed when the upper surface is projected in a case where three layers are stacked.

  Here, the longitudinal reflection wall 121 is configured as it is with the inner wall surface of the crushing tower 11, but may be configured as a separate cylinder, and the horizontal cross-sectional shape of the cylinder in that case is circular. It is not limited, and may be a regular polygon such as a hexagon or an octagon. The cylindrical body may have a tapered shape with a reduced diameter (taper angle: 10 to 30 °). Furthermore, a simple vibration sieve having a sieve with a predetermined opening shown in the figure is arranged below the crushed product discharge port 144, and the crushed product that has not been pulverized to a predetermined particle size under (less than) is pulverized again. It is good also as a structure which returns (partially circulates) to the raw material inlet 134 of the apparatus 10. FIG. In that case, reduce the number of rotating plate-like bodies / crushing chain pairs constituting the crushing means in the apparatus, for example, to obtain uniform and good quality recycled soil even with one set (one stage) or two sets (two stages). Is possible.

  In addition, a strip-like lateral reflection wall surface (rib) 122 that protrudes in a horizontal direction or obliquely downward (horizontal direction in the illustrated example) from the longitudinal reflection wall surface 121 to a position below the rotary plate-like body 152 is provided. The angle in the oblique direction is less than 45 °.

  The specifications of the pulverizer 10 having the above-described configuration are as follows, for example, when the pulverization tower inner diameter is 200 to 300 cm and the height is 200 to 300 cm.

Rotary plate-like body diameter: 1/3 to 1/4 (70 to 100 cm) of the inner diameter of the grinding tower,
Upper / middle stage distance of each rotating plate-like body: 30 to 70 cm,
Specifications of pulverized chain: Link size: inner major axis 15-34 mm, outer surface width 18-35 mm, link wire diameter: 5-10 mm, chain length; substantially the same as or slightly the vertical distance of each rotating plate 1-2cm) short,
Side reflection wall width: 5-10cm
In the above embodiment, the pulverizing chain 153 to be swiveled is attached to the periphery of the rotating plate-like body 152, but may be attached to the inner side or slightly to the outer side by an arm, and further separate from the rotating plate-like body. You may attach to the turning means of a body. For example, a grinding chain is attached to the tips of a plurality of radial arms. In this case, if the turning means is driven separately, the rotation (turning) speed of the rotating plate-like body and the crushing chain can be made different, or they can be rotated (turned) in opposite directions. . And a rotation (turning) speed and a rotation (turning) aspect can be changed according to the characteristic of a crushed material.

  Next, the processing method of the remaining soil using said processing plant 1 is demonstrated (refer FIGS. 1-3).

1) Remaining soil pretreatment process:
A metal piece and a stone block (including a concrete block) having a predetermined diameter or more are removed from the remaining soil, and a predetermined amount of a modifying material (lime or cement) is mixed with the remaining soil. Here, the amount of lime mixed with the remaining soil varies depending on the soil quality, but is usually selected appropriately within a range of 0.3 to 30% of the total amount. Here, a screw may be used as the conveying means, and then mixed into the sieving machine while mixing.

2) Primary reclaimed soil recovery process:
The pretreated residual soil that has passed through the pretreatment step is sieved by a sieving machine 5, and the upper sieve sieve is recovered as waste residual soil G0, and the lower sieve sieve below is recovered as primary recycled soil G1. Here, the upper stage opening and the lower stage opening of the sieving machine 5 are, for example, 150 mm and 50 mm, respectively. When the sieving machine is a vibration sieve, the amplitude is 3 to 8 mm and the frequency is 1000 to 1800 min ⁻¹ .

3) Secondary reclaimed soil recovery process:
The crushed material composed of the sieve G2 generated by sieving in the primary reclaimed soil recovery step is put into the pulverizer 10 and pulverized by the pulverizing means 15 (pulverization chain 153) in the pulverizer 10. The crushed product is recovered as secondary reclaimed soil G3. The crushing mechanism (action) is as described above.

Here, in the case of the pulverizing apparatus 10 having the above specifications, the rotational speed of the rotary plate-like body 152 is, for example, 1000 to 2500 min ⁻¹ , and the processing capacity is 500 to 1000 m ³ / day.

  Next, 10A of grinding | pulverization apparatuses of other embodiment are demonstrated based on FIGS. About the same part, the same figure code | symbol is attached | subjected and those all or one part is abbreviate | omitted.

  In the present embodiment, the crushing tower 11A can be rotated at a low speed, and a scraper 52 that scrapes off the sticky material adhering to the inner wall surface of the crushing tower 11A is disposed on the inner surface side.

  Specifically, a plurality of (four in the illustrated example) horizontal casters 54, 54... Are attached to the lower peripheral surface of the crushing tower 11A, and a plurality (four in the illustrated example) are disposed on the outer peripheral surface of the lower end. ) Vertical casters 56, 56... Are attached. In correspondence with each caster, a lateral ring rail 58 on which the horizontal caster 54 travels and a vertical ring rail 60 on which the vertical caster 56 travels are arranged via a regular prismatic frame 62, respectively. ing.

  Further, an annular large gear 64 is attached to the outer periphery of the grinding cylinder 11A above the horizontal caster 54, and a small gear (pinion gear) 66 for driving the annular large gear 54 is disposed. The small gear 66 is connected to the output shaft 68a of the crushing tower rotation motor 68 and is driven to rotate. At this time, the rotational speed of the crushing tower 11A is, for example, 15 times / h when the inner diameter is about 200 cm.

  In addition, the rotation method of the pulverization cylinder 11A is not limited to the above-described form. For example, a worm gear, belt transmission, chain transmission, etc. may be used.

  In the illustrated example, the scraper 52 has a configuration in which an elastic band plate (made of hard rubber or spring steel) is attached to the angle 52a to form a scraping portion 52b. At this time, the internal angle of the scraping portion 52b with respect to the tangential direction is 5 to 30 °, preferably 15 to 25 °.

  In the present embodiment, the upper surface of the rotary plate-like body 152A has an umbrella shape. The inclination angle of the umbrella shape is 5 to 30 °, preferably around 20 °. If the inclination angle is too small, the effect of forming an umbrella shape is small. On the other hand, if it is too large, the discharge angle of the crushed material is too downward, and the crossing angle with the pulverization chain may not be appropriate for pulverization.

  A chain case 70 that rotates integrally with the rotary plate-like body 152A and accommodates the pulverized chain 153 is disposed immediately below the rotary plate-like body 152A, and one or more (4 in the illustrated example) are provided on the peripheral back surface of the rotary plate-like body 152A. A chain hook 72 is provided, and a ring (ring) of the grinding chain 153 having a length exceeding the length of the turning portion is engaged with the chain hook 72, and the surplus part of the grinding chain 153 is used as the chain. The case 70 can be stored. Here, the length exceeding the length of the swivel unit 153a is normally set to be an integral multiple of the length of the swivel unit 153a (2 to 3 times). This is because the base part side of the turning part 153a may be cut.

  Here, the chain case 70 has a bottomed cylindrical shape, and is formed with four split-ring (bow-shaped) chain protrusions 74 on the ceiling side for preventing the chain from jumping out. A notch 74a for guiding the chain is formed on the inner side of the flange 74 so that the chain can be held more stably (see FIG. 8).

  Here, the chain hook usually has an insertion gap larger than the link thickness of the crushed chain and smaller than the link width. For example, when the ring thickness (wire diameter) of the pulverized chain is 5 mm and the link width is 50 mm, it is about 14 mm.

  The length exceeding the length of the swivel portion of the pulverized chain attached to the chain hook is normally 1.5 times or more, preferably 2 to 3 times the length of the swivel portion. The upper limit of the length is not particularly limited, but is usually within 3 times. If it is too short, if the grinding chain is cut, it is necessary to prepare another grinding chain. If the length is too long, the weight of the grinding chain increases and the power required for rotation increases. For example, when the inner diameter of the crushing tower is 200 cm, the length of the crushing part (outside the chain hook) of the crushing chain is about 50 cm, and the total length of the crushing chain is about 100 cm.

  In this embodiment, the chain hook is provided at the peripheral edge of the back surface of the rotating plate-like body. However, as described above, the chain hook may be provided at the tip of a separate turning means.

  The usage mode of the pulverizer is basically the same as that of the above embodiment except for the following points.

  1) Prepare a chain that is approximately double the size of the grinding part. The chain link L1 is inserted sideways into the opening 72a facing the inside of the chain hook 72 at a substantially intermediate position of the crushing chain. Then, the non-inserted links L2 and L2 on both sides of the inserted link L1 are vertically oriented (substantially orthogonal to the insertion link), and the sliding movement with respect to the chain hook 72 becomes substantially impossible. The surplus crushed chain 153 inside the chain hook 72 is similarly hooked on the notch 74a of the chain guide collar 74 and stored in the chain case.

  In this state, the main motor 16 is started to rotate the rotating plate-like body 152A at high speed, and the crushed material is charged into the pulverizing tower 11A.

  2) The crushed material charged into the pulverizing tower 11A is discharged in an oblique direction from the rotating plate-like body 152A by centrifugal force. Therefore, not only the pulverized chain 153 swirling in a substantially horizontal direction and the crushed material reflected by the reflecting wall surface 121 as described above, but also the crushed material intersects the pulverized chain 153 and receives shearing and compressive force to improve efficiency. It is crushed well.

  3) After the operation for a predetermined time, if the crushed material adheres and clayey material adheres to the inner wall and elastic reflection becomes difficult, the main motor 16 is temporarily stopped. Then, the auxiliary motor 68 is activated to rotate the crushing tower 11A at a low speed. Then, the clay component attached to the inner wall surface of the grinding cylinder 11A can be removed by the scraper 52. When the removal of the clay component is completed, the main motor 16 is started again to rotate the rotating plate-like body at a high speed.

  4) If the crushing part (swivel part) 153a of the crushing chain 153 is cut halfway due to wear or the like, the main motor 16 is also stopped and the rotation of the rotating plate-like body 153 is stopped. In this state, the link of the crushing chain 153 is turned sideways and removed from the chain hook 72 and the engaging portion (notch portion) 74a of the pop-up preventing rod 74. In this state, the chain links L1 and L2 are shifted by a necessary number, the pulverizing chain 153 is pulled out, the turning portion 153 is set to the set length, and the pulverizing chain 153 is set again in the same manner as described above.

It is a simplified front view which shows the processing plant by one form of this invention. It is a partially broken perspective view which shows an example of the grinding | pulverization apparatus by one form of this invention. It is the same front sectional view. It is a schematic front sectional drawing which shows an example of the grinding | pulverization apparatus by other embodiment of this invention. FIG. 5 is a view taken along line 5-5 in FIG. 4. FIG. 6 is an enlarged view taken along line 6-6 in FIG. 4. It is an expanded sectional view of the crushing means (rotating plate-like body / crushing chain set) in FIG. FIG. 8 is a view on arrow 8-8 in FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing plant 5 Sieving machine 7 Crushed material conveying apparatus 10 Grinding apparatus 11 Grinding tower 134 Crushed material (raw material) input port 144 Crushed material (secondary regenerated soil) discharge port 15 Grinding means 152 Rotating plate-like body 153 Grinding chain G1 Primary reclaimed soil (improved soil)
G2 Sieve top G2 Secondary reclaimed soil (improved soil)

Claims (11)

A crushing tower, and crushing means disposed inside the crushing tower,
The crushing tower is provided with a crushed material inlet at an eccentric position of the ceiling, and a crushed product outlet at the bottom side,
The pulverizing means includes a rotating plate-like body for centrifugally discharging the crushed material (raw material), a vertical reflecting wall surface for reflecting the centrifugally discharged crushed material in an inner direction, and a swiveling mechanism that is suspended inside the vertical reflecting wall surface. Consisting of multiple rigid grinding chains (grinding chains),
A crushing apparatus characterized by that.   The pulverizing apparatus according to claim 1, wherein the rotating plate-like body has an umbrella shape.   The pulverizing apparatus according to claim 1 or 2, wherein the pulverizing means is arranged in two or more stages (two sets) in the vertical direction with the pulverizing chain and the rotating plate-like body as a set.   The pulverizing apparatus according to claim 1, 2, or 3, further comprising a strip-like lateral reflection wall surface projecting in a horizontal direction or obliquely downward from the longitudinal reflection wall surface at a position below the rotary plate-like body.   The pulverizing apparatus according to claim 1, wherein the pulverizing chain is attached to a rotating plate-like body.   The pulverizing apparatus according to any one of claims 1 to 4, wherein the pulverizing chain is attached to a turning means separate from the rotating plate-like body.   A pulverization chain is housed immediately below the rotating plate-like body, a chain box that rotates integrally with the rotating plate-like body is disposed, and one or more at least one turning means is provided on the peripheral back surface of the rotating plate-like body or the tip of a separate swiveling means A chain hook with an inner opening is provided, and a ring (ring) of the grinding chain whose length exceeds the length of the swivel part can be engaged with the chain hook so that the excess part of the grinding chain can be stored in the chain case. The pulverizing apparatus according to any one of claims 1 to 6, wherein   The scraper that removes adhering substances is disposed on the inner peripheral surface of the pulverization tower of the pulverization tower, while allowing the pulverization tower to rotate at a low speed. Crushing equipment.   A method for pulverizing a hard material, in which a raw material (crushed material) is dropped on an eccentric part on the upper surface of a rotating plate-like body and released to the outside of the rotating plate-like body by the rotational centrifugal force of the rotating plate-like body. The crushed material is reflected in the direction of the rotating plate by a longitudinal reflecting wall arranged outside the rotating plate, and collides with a rigid chain that hangs down at a position inside the longitudinal reflecting wall. And pulverizing the hard material.   10. The method for pulverizing a hard material according to claim 9, wherein the longitudinally reflecting wall surface is provided with a band-like laterally reflecting wall surface projecting in a horizontal plane or obliquely downward at a position below the rotating plate. A method for reclaiming residual soil,
1) A pretreatment step of removing metal pieces and stone blocks (including concrete blocks) having a predetermined diameter or more from the remaining soil, and mixing a predetermined amount of a modifying material such as lime with the remaining soil;
2) The pretreated residual soil that has passed through the pretreatment step is sieved with a sieve having a predetermined mesh arranged in two stages, upper and lower, and the upper sieve is used as waste residual soil, and the lower sieve is used as primary recycled soil. Primary reclaimed soil collection process to collect,
3) The raw material (crushed material) formed on the lower sieve generated by sieving in the primary reclaimed soil recovery step is dropped on the eccentric part of the upper surface of the rotating plate that rotates at high speed, and the rotating plate It is released to the outside of the periphery of the rotating plate by rotating centrifugal force, and the crushed material is reflected in the direction of the rotating plate by the longitudinal reflecting wall arranged outside the periphery of the rotating plate. A secondary reclaimed soil recovery step of obtaining a crushed product by colliding with a rigid pulverized chain that hangs down at the inner position of the wall surface and pulverizing, and recovering the crushed product as a secondary reclaimed soil,
A method for reclaiming residual soil, comprising the steps of:

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