JP4109037B2 - Mud mortar production method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing mud mortar at an excavation site (construction site) using a sorting device for sorting excavated excavated soil into a predetermined size or less and a larger size.
[0002]
[Prior art]
As a conventional excavated soil sorting apparatus, as shown in FIG. 5, the outer periphery of the drum 100 is formed of a mesh body 101, and raw materials such as earth and sand are introduced into the drum 100 from one end side of the drum 100, so It is known that a raw material having a diameter smaller than the hole diameter is dropped from the holes of the mesh body 101 and a raw material having a diameter larger than the hole diameter (oversized) is discharged from the other end side of the drum 100. In addition, as shown in FIG. 6, there is also known a drum structure in which a rod structure 102 and 103 are assembled vertically and horizontally in place of the net 101 and the outer periphery of the drum is configured.
[0003]
[Problems to be solved by the invention]
Conventionally, as a treatment method for effectively using the excavated soil generated at the construction site, mud mortar is produced using excavated soil of a predetermined size or less as a raw material, the mud mortar is backfilled, and the filling into the cavity portion, etc. It is known to use it. Therefore, as a first step, in order to sort the excavated soil into a predetermined size or less and a size larger than that, a sorting device using the mesh body 101 as described above has been used. Since the soil is very viscous and sticky, it must be sorted by adding moisture along with the excavated soil. However, when water is added, equipment for collecting the water is also required, and it is necessary to make a large installation place, which is disadvantageous in terms of cost.
[0004]
Therefore, the present invention provides a method for efficiently producing mud mortar at a construction site by using a sorting device such as earth and sand that can be sorted while removing even a viscous raw material that does not require moisture. Objective.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention puts the excavated soil excavated by the excavator into a dry type sorting device that does not use moisture and sorts the excavated soil into a peptizer having a predetermined size or less. At the outlet side of the peptizer, the raw material having a diameter smaller than a certain diameter is sieved and put into the slurry agitator tank, and the slurry in the agitator tank is sent to the metering mixer apparatus, and the constant in the apparatus This is a method for producing mud mortar by adding cement to a slurry-like material with specific gravity, and connecting the donut-shaped front and rear disks with reinforcing materials at several points in the circumferential direction to form a cylindrical outer periphery And providing a fixture having a plurality of insertion holes at equal intervals on the circumferences of both discs, and forming a hole having the same size as the insertion hole at the location of both discs to which the fixture is attached. Insert both ends of the rod through the hole and insertion hole Applying retaining means for preventing the axial direction of the rod on the end side, the rods constitute a sorting device is rotatably and movably supported in the hole and the insertion hole, the disc after the previous disc subjected together to install a sorting device at a predetermined inclination angle as drops downward gradually rotate the sorting device in one direction, before the raw material is introduced from the center hole of the disc by attrition from the rod peptization The oversized raw material is discharged to the outside from the center hole of the subsequent disk.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0007]
FIG. 1 shows a side view of the entire sorting device, and viscous and adhesive excavated soil excavated by an unillustrated excavator is put into the sorting device 1 from the hopper 2 and the fed raw material rotates in one direction. In the sorting apparatus 1, the sorting apparatus 1 sorts into those having a predetermined size or smaller and those having a larger size. Between the front drum 3 located on the hopper 2 side and the rear drum 4 on the side that discharges the oversized raw material, a portion having a cylindrical shape is provided with a plurality of rods 5, and the rod 5 has a predetermined size or less. The raw material is dropped down. Moreover, the oversized raw material is accommodated in the receiving tank 6. The sorting device 1 is installed with a predetermined inclination angle that gradually falls downward from the hopper 2 side to the rear drum 4 side. Further, the rotation of the sorting device 1 is rotationally driven in one direction by engaging the gears (not shown) to which the power is transmitted from the motor with the annular gears 3A and 4A attached to the front drum 3 and the rear drum 4. It can be done.
[0008]
In the apparatus of the embodiment shown in FIG. 1, the predetermined size sorted by the sorting device 1 is such that those having a diameter of 40 mm or less are dropped from between the rods 5. The selected raw material falls from between the rods 5 and is conveyed to the belt conveyor 8 by the belt feeder 7. The belt conveyor 8 sprays raw material mud from the sprinkler to the raw material.
[0009]
As shown in FIG. 2, the main body portion of the sorting apparatus 1 includes donut-shaped discs 9 and 10 having center holes 9A and 10A that are largely opened, and the front and rear discs 9 and 10 are arranged in the circumferential direction. Are connected by the reinforcing material 11 at several places (parts divided into four in this example), and the outer periphery is formed in a cylindrical shape. And the fixtures 12 and 13 which have several insertion holes 12A and 13A at equal intervals on the circumference | surroundings of both the disks 9 and 10 are provided. In addition, holes 9B and 10B having the same size as the insertion holes 12A and 13A are formed at the positions of these attachments 12 and 13 of both disks 9 and 10, respectively. The rod 5 passes through the holes 9B and 10B and the insertion holes 12A and 13A and protrudes outward. Retaining prevention means 14 and 15 are provided on the end portion side of the rod 5 protruding outward. As the retaining prevention means 14 and 15, a hook-shaped member fixed to the rod 5 is used.
[0010]
FIG. 3 is a cross-sectional view taken along the line AA of FIG. Further, a round bar is used as the rod 5, the diameter of the rod 5 is set to 30 to 50 mm, and the diameter of the insertion hole 13A of the fixture 13 is set to about twice the rod cross-sectional diameter (60 to 100 mm). The relationship between the insertion hole 12A of the inlet-side fixture 12 and the diameter of the rod 5 is the same. In FIG. 3, the raw material is indicated by A, and the raw material attached to the rod 5 is indicated by A ′. When the raw material A is thrown into the space surrounded by the rods 5 from the hopper 2, the material smaller than the interval between the rods 5 is dropped and discharged downward, and the raw material A such as excavated soil having high viscosity and adhesion is rods. 5, the adhering matter A ′ is attached to the rod because the rod 5 also moves while rotating in the insertion hole 13A (12A) while rotating as a whole as shown in FIG. When 5 moves upward, it comes to fall.
[0011]
FIG. 4 is a diagram showing a method of the present invention for producing a mud mortar by sorting excavated soil using the sorting apparatus 1. In this plant, an example is shown in which excavated soil excavated by an excavator is put into the sorting apparatus 1 and a material having a diameter of 40 mm or less is used as a raw material for mud mortar. The selected raw material is put into the peptizer 16 from the belt conveyor 8 shown above, and the raw material having a diameter of 5 mm or less is sieved on the outlet side of the peptizer 16 and put into the slurry agitator tank 17. The slurry-like thing in this slurry agitator tank 17 is sent to the measurement tank of the measurement mixer apparatus 19 by the pump 18. Since this measuring tank is incorporated in the measuring mixer device 19, it is not shown. A fixed amount of cement is added to a fixed amount of slurry having a specific gravity in the measuring mixer device 19 and kneaded to produce a mud mortar. The mud mortar discharged from the gate 20 is accommodated in a mortar bunker 21, and the mortar bunker The mud mortar in 21 is sent to a mortar placement site by a pressure pump 22. The specific gravity adjusting device 23 is linked to an ultrasonic level meter 24, a cement meter 25 and a load cell 26 in the measuring tank. Reference numeral 27 denotes a cement silo. A certain amount of cement is weighed from the cement silo 27 by a metering machine 28, and a certain amount of cement is fed from the discharge gate 29 to the metering mixer device 19. The cement and the slurry are kneaded with a concrete mixer, and the mud mortar produced from the air cylinder type gate 20 is taken out. Reference numeral 30 denotes a water tank, which is made into a slurry-like material having a specific gravity or more by adding water to a slurry-like material introduced into the measuring tank by a pump 31 of the water tank 30.
[0012]
Even if it is what is called a dry type, this sorter 1 can sort efficiently a raw material with strong viscosity and adhesion, without supplying moisture conventionally. In the above-described embodiment, a round bar is used as the rod 5, but a rod having a polygonal cross section may be used. Of course, the distance between the rods 5 can be changed according to the size to be selected.
[0013]
【The invention's effect】
As described above, according to the present invention, the excavated soil excavated by the excavator is put into a dry type sorting device that does not use moisture, and the one that is sorted to a predetermined size or less is put into the peptizer. At the outlet side of the peptizer, the raw material having a diameter smaller than a certain diameter is screened and put into the slurry agitator tank, and the slurry in the agitator tank is sent to the metering mixer device, where it is constant. This is a method for producing mud mortar by adding cement to a slurry-like material with specific gravity, and connecting the donut-shaped front and rear disks with reinforcing materials at several points in the circumferential direction to form a cylindrical outer periphery And providing a fixture having a plurality of insertion holes at equal intervals on the circumferences of both discs, and forming a hole having the same size as the insertion hole at the location of both discs to which the fixture is attached. Insert both ends of the rod into the hole and the insertion hole. Both ends subjected to retaining means for preventing the axial direction of the rod, these rods constitute a sorting device is rotatably and movably supported in the hole and the insertion hole, the disc after the previous disc subjected together to install a sorting device at a predetermined inclination angle as drops downward gradually rotate the sorting device in one direction, before the raw material is introduced from the center hole of the disc by attrition from the rod peptization Since the oversized raw material is discharged to the outside from the center hole of the subsequent disk, each rod rotates and moves in the insertion hole of the fixture. The raw material adhering to the rod falls while rotating and moving, and it is efficiently performed to sort the raw material into those having a certain size or less without using water. Thus, since the size of the raw material can be selected without using water, the installation space is reduced, which is advantageous in terms of cost. Even if the material is highly sticky or sticky, such as excavated soil, setting the diameter of the insertion hole of the fixture to about twice the rod cross-sectional diameter allows the rod to rotate and move, The raw material attached to the rod with the rotation in one direction can be dropped efficiently.

[Brief description of the drawings]
FIG. 1 is a side view showing an entire sorting apparatus .
2 is a cross-sectional view taken along the line BB of FIG. 3 showing a main body portion of the sorting device.
3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is an overall explanatory view showing an example in which this sorting device is used in a mud mortar production plant.
FIG. 5 is a side view showing a conventional example.
FIG. 6 is a partially enlarged front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sorting device 5 Rod 9,10 Disc 9A, 10A Center hole 9B, 10B Hole 11 Reinforcement material 12, 13 Mounting tool 12A, 13A Insertion hole 14, 15 Preventing means
16 Peptizer
17 Agitator tank for slurry
19 Weighing mixer device

Claims (2)

Excavated soil excavated by the excavator is put into a dry type sorting device (1) that does not use moisture, and sorted to a predetermined size or less, and then put into a peptizer (16). The raw material having a diameter smaller than a certain diameter is sieved on the outlet side of (16) and charged into the slurry agitator tank (17), and the slurry in the agitator tank (17) is sent to the measuring mixer device (19). , A method for producing a mud mortar by adding cement to a slurry-like material having a specific gravity in the apparatus,
The donut-shaped front and rear discs (9), (10) are connected at several points in the circumferential direction with reinforcing materials (11), and the outer periphery is formed into a cylindrical shape,
There are provided fixtures (12), (13) having a plurality of insertion holes (12A), (13A) at equal intervals on the circumferences of both disks (9), (10),
Holes (9B) and (10B) having the same size as the insertion holes (12A) and (13A) are provided at the positions of both disks (9) and (10) to which the fixtures (12) and (13) are attached. Forming,
Both ends of the plurality of rods (5) are passed through the holes (9B), (10B) and the insertion holes (12A), (13A) to prevent the rod (5) from coming off in the axial direction at both ends. ), (15)
These rods (5) are supported rotatably and movable in the holes (9B), (10B) and the insertion holes (12A), (13A) to constitute the sorting device (1),
The sorting device (1) is installed with a predetermined inclination angle that gradually falls downward from the front disc (9) to the rear disc (10), and the sorting device (1) is rotated in one direction. The raw material (A) charged from the central hole (9A) of the previous disk (9) is screened from the rod (5) and charged into the peptizer (16).
A method for producing mud mortar, characterized in that the oversized material is discharged to the outside from the central hole (10A) of the subsequent disk (10).   The cross-sectional diameter of the rod (5) is 30 to 50 mm, and the diameters of the insertion holes (12A) and (13A) of the fixtures (12) and (13) are 60 to 100 mm. Mud mortar production method.

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