JP2655250B2 - Dust cover for soil agitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil stirrer for supplying a powdered solidified material such as cement and stirring and mixing the ground, and in particular, to prevent the generation of dust generated when the solidified material is injected. And a dust cover of the soil stirrer.

[0002]

2. Description of the Related Art Conventionally, for example, there is a power shovel in which a soil stirrer is attached to the end of an arm, and a supply pipe for supplying a powdery solidifying material such as cement is attached to the soil stirrer. . Then, the ground is agitated and mixed for improvement by injecting the solidified material from the outlet of the supply pipe using compressed air.

[0003]

However, in such ground improvement, since the solidified material is injected by compressed air, a part of the momentum is scattered as dust in the surrounding air, which causes dust pollution. Was to do. In view of the above, the present invention has been made to solve the above problems, and provides a dustproof cover for a soil stirrer in which a part of a solidifying material supplied during stirring and mixing of the ground is prevented from scattering around and causing dust pollution. The purpose is to do.

[0004]

In order to achieve the above object, a dust cover of a soil stirrer according to the present invention is provided with a supply pipe for supplying a solidifying material such as cement, and supplies the solidifying material from the supply pipe. In a soil stirrer that stirs and mixes the ground, a top plate is attached to the soil stirrer, and a flexible net surrounding the stirring portion of the soil stirrer is erected around the periphery of the top plate. The top plate is provided with an intake port for a dust collection duct, and a plurality of sprayers for spraying water are arranged at appropriate positions on the lower surface of the top plate.

[0005]

The ground is stirred and mixed by the soil stirrer while the powdery solidified material is supplied through the supply pipe. At this time, the soaring solidified material is confined in the net, and is subsequently captured by mist-like water droplets sprayed from each sprayer and falls down together with the water droplets. Furthermore, the remaining solidified material that floats is sucked into the intake port and collected in the dust collector via the dust collection duct.
As a result, the solidified material is hardly scattered outside the net.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dust cover of a soil agitator according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a power shovel (backhoe) including a boom 2 and an arm 3, and a soil stirrer 4 is attached to a tip of the arm 3. As shown in FIG. 2, this soil stirrer 4 has chains 6 and 6 suspended between a pair of sprockets 5 arranged vertically and a plurality of stirring blades 7 are arranged on the chains 6 and 6, respectively. It has a portion 4a. Then, the motor 8 is driven, and the chains 6, 6 are rotated via the sprockets 5, 5 interlocked with the motor 8 to stir and mix the soil with the stirring blades 7. The entire operation of the soil agitator 4 can be moved up and down by the operation.

[0007] On the other hand, in FIG. 3, reference numeral 9 denotes a cement silo for storing cement as a powdery solidifying material, and the stored cement is supplied to a powder hopper 12 mounted on a machine frame 11 via a transport pipe 10. Is done. 13 is a powder hopper 12
A rotary valve 14 is connected to the lower end outlet of the pump and supplies a fixed amount of cement. A motor 14 drives the rotary valve 13 to rotate. The lower end of the delivery pipe 15 of the rotary valve 13 is connected to the base end of the supply pipe 16 to supply a fixed amount of cement. Compressed air is supplied to the supply pipe 16 from the dry compressor C, and a mixed flow of the compressed air and the solidified material is pumped through the supply pipe 16. Note that R
Is an operation management room for operating these devices. The distal end of the supply pipe 16 is passed over the power shovel 1 and further along the boom 2 and the arm 3, and the distal end is attached to the soil agitator 4. Then, while stirring and mixing the soil with each stirring blade 7 of the soil stirrer 4, the solidified material is injected into the soil from the powder injection port 16 a at the tip of the supply pipe 16 to improve the soil.

Reference numeral 17 denotes a dustproof cover capable of covering the entire periphery of the stirring section 4a of the soil stirrer 4. A rectangular top plate 18 is attached to the upper end of the soil stirrer 4 almost horizontally. A net 19 is formed in a skirt shape having a lower surface opened from the periphery of the net 19, and the net 19 has a length that covers the entire soil agitator 4.

The top plate 18 is made of an iron plate, and has a rectangular insertion hole 20 through which the base end of the soil agitator 4 is inserted at the center thereof.
An insertion hole 22 facing the intake port 21a of the dust collection duct 21 is opened. At the four corners on the lower surface of the top plate 18, the sprayers 23 are installed at a required angle and obliquely downward toward the center. The net 19 is made of a flexible material such as a vinyl chloride sheet which can be sealed from the outside. The dustproof cover 17 is fixed by inserting the insertion hole 20 of the top plate 18 into the upper end of the soil agitator 4.
The base end of the dust collection duct 21 is connected to a dust collector 24 mounted on the power shovel 1. A water pipe 25 is connected to each of the sprayers 23.

Next, the operation will be described.
Is supplied to the powder hopper 12 and the motor 14 is driven to operate the rotary valve 13 to supply a fixed amount of the solidified material to the supply pipe 16. Then, the compressed air from the dry compressor C forms a mixed flow of powder and air, and the inside of the supply pipe 16 is pressure-fed to the soil agitator 4 side. In this way, the mixed flow that is supplied at a constant pressure at an appropriate pressure is:
Injection is performed in conjunction with the stirring and mixing operation of the soil by the soil stirrer 4 attached to the tip of the arm 3 of the power shovel 1 to improve the soil.

At this time, the dust of the solidified material that rises to the ground without being mixed with the soil is confined between the ground surface and the cover 17 covering the soil agitator 4 as shown in FIG.
Subsequently, the mist-like water droplets sprayed from the respective sprayers 23 are captured and fall downward together with the water droplets. Further, the remaining floating dust is sucked into the intake port 21a and collected by the dust collector 24.
The dust collected by the dust collector 24 is returned to the cement silo 9 or the powder hopper 12, and is again supplied to the supply pipe 16 and recycled. Thereby, the solidified material is hardly scattered outside the net 19. The soil stirrer 4 is not limited to the one in the present embodiment, but may be of another type.

[0012]

As described above, the dust cover of the soil agitator according to the present invention covers the periphery of the agitator of the soil agitator with a net and sprays water to drop dust in the net downward. Further, since the remaining solidified material that floats is collected by the dust collection duct, the dust hardly scatters outside the net, and the occurrence of dust pollution can be prevented. Moreover, there is an advantage that the remaining dust can be recycled by collecting the dust in the dust collector, and the material loss of the solidified material can be eliminated.

[Brief description of the drawings]

FIG. 1 is a side view showing a use state of a soil stirrer.

FIG. 2 is a perspective view showing a state where a dust cover is attached to a soil agitator.

FIG. 3 is a schematic configuration diagram showing the entire operation.

FIG. 4 is a sectional view showing a use state of the dustproof cover.

FIG. 5 is a sectional view taken along line XX in FIG. 4;

[Description of Signs] 4 Soil stirrer 4a Stirrer 16 Supply pipe 17 Dustproof cover 18 Top plate 19 Net 21 Dust collection duct 21a Inlet port 23 Sprayer

Claims (1)

(57) [Claims] 1. A soil stirrer in which a supply pipe for supplying a solidifying material such as cement is attached, and a ground is stirred and mixed while supplying the solidifying material from the supply pipe. At the periphery of the top plate, a flexible net surrounding the agitator of the soil stirrer is erected, and the top plate is provided with an intake port for a dust collection duct, and water is provided at an appropriate position on the lower surface of the top plate. A dust cover for a soil stirrer, comprising a plurality of sprayers for spraying water.