JPH0652928U - Remaining soil mixing machine - Google Patents

Abstract

(57) [Summary] [Structure] A swingable hammer that is shaken out by centrifugal force is installed in a casing that has a supply port for residual soil and soil improvement material at the top and a discharge port for reforming mixed residual soil at the bottom. At least four drive rotors, which are divided and arranged in the outer peripheral portion and the axial direction, are arranged in the upper and lower stages, respectively, and the upper drive rotor and the lower drive rotors are arranged in a staggered manner. Soil mixing machine for mixing the remaining soil consisting of with soil improvement material. [Effects] A lump of residual soil and foreign substances can be disintegrated and crushed by a hammer hit by centrifugal force generated by the rotation of the drive rotor, and after being crushed and mixed by each drive rotor in the upper stage, the third rotor in the lower stage , The fourth rotor is sequentially repeated, and the impact is instantaneously given, so that it is possible to disperse and mix the residual soil without kneading the residual soil, and in particular, an extremely good degree of mixing can be obtained in soil improvement of defective residual soil such as construction residual soil. In addition, upflow can be suppressed, dust can be prevented from being produced by the soil improvement material, and labor for environment-related equipment such as dust collection equipment can be saved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a residual soil mixing machine, which is particularly suitable for use in soil quality improvement of bad residual soil such as construction excavation residual soil.

[0002]

[Prior art]

 In order to improve the soil quality of the residual soil, it is necessary to mix the residual soil and the soil improvement material well. As a conventional residual soil mixing machine, a horizontal shaft that rotates is installed in a box-shaped tank, multiple stirring blades are attached to the main shaft, and the object is stirred and mixed horizontally or while feeding the object in a gentle gradient direction. For example, a paddle mixer, a ribbon mixer, etc., or one rotating rotor and two or three repulsion plates in the box-shaped body, the object is thrown in through the upper supply port and dispersed by the impact force of the rotor. A mixing method, such as an impact mixer, is known.

Generally, the residual soil for construction and the like that needs to be improved contains not only coarse concrete and ascongrass, but also many impurities, and is highly adherent because of cohesive soil. In addition, soil improvement materials are generally powdered particles such as quick lime and cement, and are very likely to generate dust.

In paddle mixers, ribbon mixers, etc., if the residual soil containing a large amount of foreign matters such as the above-mentioned coarse concrete husks and Ascon garble is used, the foreign matters are caught between the tank and the stirring blades, which causes the machine This causes damage, which increases the strength of the machine and requires a pretreatment process to remove contaminants, resulting in a significantly high treatment cost and a tank from the time when the residual soil is supplied until the time when it is discharged. Since the internal residence time is long (generally 10 to 20 seconds), there is a problem that the residual soil is often repelled and the property is rather deteriorated.

In the impact mixer, there is a problem that residual soil adheres to the fixed repulsion plate and the inside of the casing to reduce the mixing property, and therefore the inside needs to be cleaned. In addition, all of these mixers have a problem in that they must be used together with a large-capacity dust collecting facility in order to prevent environmental damage due to dust generation of powder and granules.

[0006]

[Problems to be solved by the device]

 The present invention overcomes the problems of these conventional residual soil mixers, provides a residual soil mixer that is not damaged by contaminants, does not deteriorate in mixing due to the adherence of residual soil, and can suppress dust generation. It was made for the purpose.

[0007]

[Means for Solving the Problems]

 In the residual soil mixing machine for mixing the residual soil with the soil improvement material, the present inventors have provided in the casing with a supply port for the residual soil and the soil improvement material at the upper part and a discharge port for the modified mixed residual soil at the lower part. At least four drive rotors, in which a swingable hammer that is swung out by centrifugal force is divided into an axial outer peripheral portion and an axial direction and arranged, are arranged at least two in each of the upper and lower stages, and the upper drive rotor and the lower drive rotor are arranged. The residual soil mixing machine is characterized in that the respective drive rotors are arranged in a staggered manner.

In the residual soil mixing machine of the present invention, the shape of the casing is preferably a trapezoidal shape having a taper-like divergence from the upper end to the lower end. Such a taper shape can prevent soil from adhering to the inner surface of the casing.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a box-shaped main body (casing) having a supply port 2 for residual soil and soil improvement material at the upper end, and a lower end (bottom) having a wide discharge port with the entire surface of the casing open. 3 is provided.

The casing 1 has a trapezoidal shape extending from the upper end portion to the discharge port at the lower end portion, so that the soil can be prevented from adhering to the inner surface of the main body casing. Further, a shield plate 4 having a V-shaped cross section is provided around the lower end of the supply port 2 on the inner surface of the upper end of the casing to prevent the supply raw material from being scattered to the outside and to prevent the drive rotor from being discharged. It has a shape that blocks the dust that rises with the rising airflow generated by rotation and does not let it out of the mixer.

Next, in FIG. 2, reference numeral 11 denotes a drive rotor shaft which is rotationally driven, and a hammer which is axially divided into four hammer shafts 13 fixed by blades 12 to the outer peripheral portion of the shaft 11. A plurality of 14 are rotatably attached. The hammer 14 is shown by a solid line when the rotor is rotating and by a broken line when the rotor is stopped.

As shown in FIG. 1, the total number of drive rotors is four, and the first rotor 21 and the second rotor 22 in the upper stage are mounted symmetrically with respect to the center of the supply port, and are respectively located inside (first rotor). Rotates to the right and the second rotor rotates to the left). The lower third rotor 23 and the fourth rotor 24 are provided in positions staggered with respect to the upper rotor, and they also rotate inward (the third rotor rotates to the right and the fourth rotor rotates to the left). To do.

The distance between the rotors is such that the distance between the third rotor and the fourth rotor in the lower stage is wider than the distance between the first rotor and the second rotor in the upper stage. It is located below and is arranged so that it becomes wider with respect to the flow of soil.

[0015]

[Effect of device]

 In the residual soil mixer of the present invention, at least four drive rotors are arranged in parallel in the upper and lower stages, and the upper drive rotors and the lower drive rotors are arranged in staggered positions. Since the structure is such that a swingable and intermittently divided hammer is provided on the outer peripheral portion of each rotor, the hammer is strongly impacted by the centrifugal force generated by the rotation of the drive rotor (impact). ) Can disintegrate or crush lumps of residual soil and coarse impurities, and the lower drive rotor can be crushed and mixed by the upper drive rotors by staggering it with the upper drive rotor. Since the third rotor and the fourth rotor are sequentially repeated and the impact is momentarily given, it is possible to disperse and mix without remaining soil kneading, especially in the soil improvement of bad residual soil such as construction residual soil. Extreme A good degree of mixing can be obtained, and the upward and downward flow in the main body can be suppressed by preventing the upward flow in the main body by making the rotation direction of the hammer downward in both the upper and lower stages. It is possible to save labor for the environment-related equipment.

[Brief description of drawings]

FIG. 1 is a schematic front view.

FIG. 2 is a schematic diagram of a drive rotor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuzo Ogama 8-17-6-302 Okamura, Isogo-ku, Yokohama-shi Kanagawa Prefecture (72) Inventor Yukitoshi Nanami 2171-3 Haha, Hamura-shi, Tokyo

Claims (1)

[Scope of utility model registration request] 1. A residual soil mixer for mixing the residual soil with a soil improvement material, wherein a casing is provided with a supply port for the residual soil and the soil improvement material at an upper portion and a discharge port for the reformed mixed residual soil at a lower portion, respectively.
At least four drive rotors, in which swingable hammers that are thrown out by centrifugal force are divided and arranged in the outer peripheral portion of the shaft and in the axial direction, are arranged at least two in the upper and lower stages, respectively. A residual soil mixing machine characterized in that the drive rotors are arranged in a staggered manner.