JP4768316B2 - Soil crusher - Google Patents

Description

  The present invention relates to a soil crusher.

  Conventional soil crushing devices are, for example, insolubilization treatment that mixes adsorbents and the like with contaminated soil so that heavy metals and other contaminants do not melt out, or soil improvement treatment that mixes solidifying agents and the like with soil The function of pulverizing the soil is realized by a belt conveyor, a scraping roller provided with a rotating shaft perpendicular to the conveying direction above the belt conveyor, and a pulverizing rotor with a plurality of blades. It is demonstrated by having.

In the soil crusher described above, the soil is transported from the inlet side to the outlet side by the belt conveyor, and the solidifying agent is supplied from above the soil in the vicinity of the hopper, which is the soil inlet, The solidifying agent is mixed with the soil while being finely pulverized with the above pulverizing rotor (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2001-140281 (Embodiments of the Invention, FIG. 1)

  Now, in the soil crusher as described above, since the crushing rotor rotates at the same rotational speed, the positions where the blades of adjacent crushing rotors pass each other during rotation are always the same, and the soil is scraped by each blade. There is a possibility of being discharged from the outlet without being mixed.

  Then, the lump of soil that has not been stirred is not finely pulverized, but is conveyed as it is on the belt conveyor, and is discharged as it is from the discharge port.

  Therefore, the present invention has been developed to improve the above-described problems, and an object of the present invention is to provide a soil crushing apparatus that can crush the soil evenly.

In order to achieve the above-described object, the means of the present invention includes a belt conveyor that conveys soil introduced from a charging port provided on one end side to a discharge port on the other end side, and a conveying direction above the belt conveyor. in soil crushing apparatus provided with a plurality of grinding rotor provided side by side on, the rotation speed of the grinding rotor rotational speed of each grinding rotor is positioned a rotational speed inlet side of the crushing rotor located on the outlet side with a different high rather set, further adapted to protrude the end portion of the belt conveyor from the discharge port, provided spraying means for spraying the insolubilizing agent for insolubilizing the above contaminants sites projecting from the outlet to the soil on the conveyor belt It is characterized by this.
In this case, the conveying speed of the belt conveyor is preferably at least lower than the peripheral speed of the outermost periphery of the grinding rotor that rotates at the slowest rotational speed.
Similarly, the crushing rotor preferably includes a shaft and a plurality of crushing blades provided on the shaft.
Similarly, the spraying means may be constituted by a spray nozzle, and the spray nozzle may spray an insolubilizing agent containing a mineral or the like adsorbing a contaminant supplied from the insolubilizing agent tank onto the soil on the conveyor belt of the belt conveyor. .
Similarly, it is preferable to provide a leveling means for leveling the height of the soil conveyed outside the discharge port to a predetermined height.

  In the soil pulverizing apparatus of the present invention, since the rotational speeds of the respective pulverizing rotors are different, the positions at which the respective pulverizing blades of adjacent pulverizing rotors pass each other can be periodically made different, thereby making the soil uneven. It can be crushed without.

The rotational speed of each crushing rotor is set so as to increase toward the discharge port side, so that the movement speed of the soil on the discharge port side can be increased, and the amount of soil on the discharge port side can be increased. Since the amount of soil on the side is reduced and the soil is conveyed by the belt conveyor, the soil does not stay near the discharge port and the discharge port is not clogged.
In addition, the soil discharged from the discharge port is conveyed as it is on the belt conveyor, receives the supply of the insolubilizing agent from the spraying means, and after the insolubilizing agent is sprayed, the soil falls as it is from the belt conveyor to the ground, Laminated on the soil and mixed with the soil.
Therefore, it is possible to spray the insolubilizing agent on the moving soil in the transport zone, and the soil and the insolubilizing agent can be mixed without providing a mixing rotor or the like.

  The present invention will be described below based on the illustrated embodiment. FIG. 1 is a schematic view of a soil crusher. FIG. 2 is a plan view of the soil crusher.

  As shown in FIG. 1 and FIG. 2, the soil crusher E in one embodiment basically includes a crushing tank 1, a belt conveyor 2 provided at the bottom of the crushing tank 1, and a conveying direction of the belt conveyor 2. And a plurality of grinding rotors 3 arranged side by side.

  Hereinafter, the pulverization tank 1 is formed in a substantially rectangular parallelepiped shape, and an opening 11 communicating with the inside and outside of the pulverization tank 1 is formed above the left end in FIG. A hopper 12 is provided as an input port for facilitating the input.

  And the other end side of the crushing tank 1 is inclined downward so that the upper part is inclined so that an inclined surface 13 is formed, and the other end is opened to form a discharge port 14 for discharging soil. Has been.

  Further, a belt conveyor 2 is installed at the bottom of the crushing tank 1, and the belt conveyor 2 is a drive rotor 22, a driven rotor 21, and a transport belt wound around the drive rotor 22 and the driven rotor 21. 23, and the conveyance distance is set to be longer than the left and right lengths in FIG.

  And the right end in FIG. 1 of the belt conveyor 2 is made to protrude from the discharge port 14, and the soil thrown in from the hopper 12 can be conveyed out of the discharge port 14. FIG.

  On the other hand, the crushing rotor 3 includes a shaft 31 rotatably attached to the crushing tank 1 and a plurality of crushing blades 32 attached to the shaft 31, and a plurality of crushing rotors 3 are provided side by side in the conveying direction of the belt conveyor 2. . As shown in FIG. 2, a plurality of the pulverization blades 32 are provided side by side in the axial direction of the shaft 31. In the figure, four crushing rotors 3 are provided, but two or more crushing rotors may be used.

  In addition, a predetermined interval is provided so that the arc drawn when the tip of the grinding blade 32 that is the outer periphery of the grinding rotor 3 rotates and the upper surface of the transport belt 23 of the belt conveyor 2 do not interfere with each other.

  The shape of the pulverization blade 32 may be any shape as long as it is suitable for pulverizing soil. Specifically, for example, the shape of the pedal shape shown in the figure or the shape of a fin shape may be used. Is possible.

  Further, the distance between the shafts 31 is set so as to be suitable for the grinding of the soil, but when the shafts 31 are arranged in a positional relationship such that the trajectories of the tips of the grinding blades 32 intersect, 31 so that each crushing blade 32 provided on one shaft 31 enters between each crushing blade 32 provided on the other shaft 31, that is, each crushing blade 32 between adjacent shafts 31 is nested. The crushing blades 32 may be prevented from interfering with each other.

  Each shaft 31 of this crushing rotor 3 is rotationally driven in the direction of the arrow in FIG. 1 by each drive source 33 such as a hydraulic motor provided on the side of the crushing tank 1. The rotational speeds are set to be different from each other, and the rotational speed of the grinding rotor 3 located on the discharge port 14 side is set to be higher than the rotational speed of the grinding rotor 3 located on the hopper 12 side which is the charging port side. Has been.

  That is, the rotational speed of the crushing rotor 3 increases from the hopper 12 side toward the discharge port 14 side. Further, the conveyance speed of the conveyance belt 23 of the belt conveyor 2 is lower than the peripheral speed at the outermost periphery of the crushing rotor 3 near the hopper 12 rotating at the lowest rotation speed, that is, the peripheral speed at the tip of the crushing blade 32. Is set to

  Further, in the soil crusher E, in addition to the crushing rotor 3 described above, a feeder 4 that is rotationally driven is provided in the vicinity of the discharge port 14, and the feeder 4 includes the plurality of crushing rotors. 3 is a leveling means for leveling the height of the soil crushed at 3 and conveyed to the discharge port 14 by the belt conveyor 2 to a predetermined height. In addition, the inclined surface 13 is provided in the other end part of the crushing tank 1, and it is possible to level the soil to a certain height by the inclined surface 13 and the discharge port 14, and the feeder 4 is not provided. Only the inclined surface 13 and the discharge port 14 may be used as a leveling means. However, it is preferable to provide a feeder 4 that is actively driven to rotate and level the soil with the feeder 4. There is an advantage that retention can be prevented.

  In addition, a spraying means is provided above the portion protruding from the discharge port 14 of the belt conveyor 2. In this case, specifically, the spraying means is the spray nozzle 5, and the spray nozzle 5 applies an insolubilizer including a mineral adsorbing a contaminant supplied from a not-shown insolubilizer tank to the soil on the transport belt 23. It is supposed to be sprayed on. In addition, although the said insolubilizing agent is made into the slurry form so that it may be easy to spread with the spray nozzle 5, when spraying a granular insolubilizing agent, a spraying means shall be made easy to spray a granular insolubilizing agent. Also good.

  Next, the operation of the soil crushing apparatus configured as described above will be described. The soil thrown into the hopper 12 is conveyed toward the discharge port 14 by the belt conveyor 2, and each crushing rotor is in the middle of the conveyance. 3 to grind.

  At this time, since the rotational speeds of the respective grinding rotors 3 are different, the positions where the grinding blades 32 of the neighboring grinding rotors 3 pass each other can be periodically made different and the number of times of passing can be increased, whereby the soil is removed. It can be pulverized evenly.

  As described above, in the soil pulverizer E, the soil can be pulverized without unevenness, so that the subsequent mixing work of the insolubilizing agent and the like is facilitated.

  And the rotational speed of each grinding | pulverization rotor 3 is set so that it may become so high that it goes to the discharge port 14 side, and this raises the movement speed of the soil by the side of the discharge port 14 in the grinding | pulverization tank 1, and the hopper 12 side is increased. The amount of soil on the discharge port 14 side can be reduced from the amount of soil, and the soil is transported by the belt conveyor 2, so that the soil does not stay near the discharge port 14 and the discharge port 14 is not clogged.

  Further, since the conveying speed of the belt conveyor 2 is set lower than the peripheral speed of the crushing rotor 3 just below the charging port that rotates at the lowest speed, the crushing blades 32 of the crushing rotor 3 are moved to the moving speed of the soil conveyed by the belt conveyor 2. The amount of soil that is discharged without being caught up by the crushing blades 32 without being caught up can be reduced, whereby the soil can be finely crushed.

  In this way, the soil conveyed to the vicinity of the discharge port 14 by the belt conveyor 2 is finely pulverized by each of the pulverization rotors 3 described above. The soil accumulation height is leveled to a predetermined height by the feeder 4 which is a leveling means provided in the vicinity, and is discharged from the discharge port 14.

  Subsequently, the soil discharged from the discharge port 14 is transported as it is by the belt conveyor 2 and supplied with the insolubilizing agent from the spray nozzle 5. Then, after spraying the insolubilizing agent, the soil is conveyed to the right in FIG. 1 by the belt conveyor 2 and falls to the ground from the right end of the belt conveyor 2 in FIG. 1. By performing continuously, the insolubilizer is laminated | stacked on soil and mixed with soil.

  Therefore, in this soil crusher E, it is possible to spray the insolubilizing agent on the moving soil in the transport belt 23, and the soil and the insolubilizing agent can be mixed without providing a mixing rotor or the like. it can.

  In addition, in particular, when leveling the soil by a leveling means, the ratio of the insolubilizing agent to the soil can be made uniform, and when the level of the soil is leveled low, It is possible to mix the soil and the insolubilizing agent evenly.

  As described above, since the inclined surface 13 and the discharge port 14 also have a soil leveling function, even if an abnormality occurs in the feeder 4, the soil is leveled by the inclined surface 13 and the discharge port 14. A situation in which mixing with the insolubilizer becomes impossible can be avoided.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

It is the schematic of a soil grinder. It is a top view of a soil crusher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crushing tank 11 Opening part 12 Hopper 13 which is an input port Inclined surface 14 Discharge port 2 Belt conveyor 3 Crushing rotor 31 Shaft 32 Crushing blade 4 Feeder 5 which is a leveling means Spray nozzle E which is a spraying means E Soil grinding device

Claims (5)

A soil crusher comprising: a belt conveyor that conveys soil introduced from an input port provided on one end side to a discharge port on the other end side; and a plurality of crushing rotors provided above the belt conveyor and arranged in the conveying direction. in, highly rather set than the rotational speed of the grinding rotor position rotation speed of the grinding rotor located on inlet side to the outlet side with rotation speed different for each grinding rotor, further an end portion of the belt conveyor from the outlet A soil pulverizing apparatus characterized by comprising a spraying means for spraying an insolubilizing agent for insolubilizing contaminants on the soil on the belt conveyor above the portion protruding from the discharge port . 2. The soil crusher according to claim 1, wherein the conveying speed of the belt conveyor is lower than the peripheral speed of the outermost circumference of the crushing rotor rotating at least at the slowest rotation speed. The soil crusher according to claim 1 or 2, wherein the crushing rotor includes a shaft and a plurality of crushing blades provided on the shaft. The spraying means is constituted by a spray nozzle, and the spray nozzle sprays an insolubilizing agent containing a mineral or the like adsorbing a contaminant supplied from an insolubilizing agent tank onto the soil on the conveyor belt of the belt conveyor. The soil crusher according to any one of items 1 to 3. The soil crusher according to any one of claims 1 to 4, further comprising a leveling means for leveling the height of the soil conveyed outside the discharge port to a predetermined height.

Images