JP2024057159A - Mixing Attachment - Google Patents

Abstract

The present invention provides a mixing attachment that achieves both improved stirring and mixing efficiency and suppression of weight.
[Solution] The mixing attachment 1 can be attached to the tip of the arm of a washer shovel and comprises a frame 2 and a number of rotors 3, 3 whose central rotating shafts have mixing blades 4 and are held horizontally, with the multiple rotors 3, 3 each being provided at positions successively further away from the tip of the arm.
[Selected Figure] Figure 1

Description

The present invention relates to a mixing attachment that can be attached to the end of a power shovel's arm to mix and stir on-site soil, solidification materials or soil purification chemicals, and water.

A method is known for mixing and stirring on-site soil, solidifying material, and water for ground improvement. Another method is known for mixing and stirring on-site soil, soil purification chemicals, and water for soil purification. One example of a machine that can perform mixing and stirring is a power shovel with a mixing attachment attached to the end of its arm. The mixing attachment mixes and stirs by rotating agitating blades.

One such mixing attachment is shown in Patent Document 1. A rotor with mixing blades is provided inside the bucket body.

JP 2011-047155 A

In the mixing attachment of Patent Document 1, the stirring blades rotate within the space surrounded by the bucket body, so depending on the geology and mixing conditions, the stirring blades and the soil and sand may rotate together within the bucket body, causing uneven mixing.

There is also a demand for the mixing range of a power shovel to be wider and deeper. However, if the mixing attachment becomes heavier, it becomes necessary to attach a counterweight to the power shovel to ensure safety during operation. Attaching a counterweight increases the energy required for the lower running body to travel and the upper rotating body to rotate. Furthermore, the weight of the mixing attachment reduces the stability of the power shovel to which it is attached, increasing the possibility of it tipping over during operation. Therefore, there is a problem in that it is desirable to avoid increasing the weight of the mixing attachment as much as possible.

In particular, when mixing on-site soil and sand, the process is as follows. First, over-digging is done with a power shovel equipped with a regular bucket, and water, chemicals, etc. are added. Next, the regular bucket is removed, and the material is mixed and mixed with a power shovel equipped with a mixing attachment. Next, the mixing attachment is removed, and the top is formed again with a power shovel equipped with a regular bucket. Therefore, when all processes are performed with one power shovel, the stability of a single power shovel can be consistently maintained throughout the entire process by minimizing the weight difference between the regular bucket and the mixing attachment.

The present invention aims to provide a mixing attachment that improves mixing efficiency while minimizing weight.

The mixing attachment of claim 1 of the present invention can be attached to the tip of the arm of a power shovel, and comprises a frame body and a plurality of rotors with mixing blades whose central rotation axis is held horizontally, and the plurality of rotors are each provided at positions that are successively farther away from the tip of the arm.

The mixing attachment of claim 1, with its above-mentioned configuration, can suppress the co-rotation of the mixing blades and the soil and sand, improving the mixing efficiency. In addition, by adjusting the number of rotors held horizontally according to the power shovel to which it is attached, the weight of the bucket mixing can be suppressed.

The mixing attachment of claim 2 of the present invention is the mixing attachment of claim 1, in which the length from the axis to the tip of the mixing blade in the radial direction of rotation is different for each rotor.

When mixing soil and sand containing pebbles and large gravel, the pebbles and large gravel may be present between the blades of different rotors. The mixing attachment of claim 2 has the same effect as claim 1, and in addition, due to the difference in torque at the tip of each blade, the pebbles and large gravel are discharged from between the blades of different rotors. This makes it possible to prevent pebbles and large gravel from getting caught between the blades of different rotors, causing the blades to stop rotating.

The mixing attachment of claim 3 is the mixing attachment of claim 1 or 2, in which adjacent rotors rotate in opposite directions around the central axis of rotation.

The mixing attachment of claim 3 of the present invention has the same effect as claim 1 or claim 2, and in addition, it can generate turbulence within the object to be stirred, improving the efficiency of stirring and mixing.

The invention of any one of claims 1 to 3 can achieve both improved stirring and mixing efficiency and reduced weight.

FIG. 2 is a front view of a mixing attachment according to one embodiment of the present invention. FIG. 2 is a schematic side view of the mixing attachment of FIG. 1. FIG. 1 is a schematic diagram showing a mixing operation process using a power shovel equipped with a mixing attachment. FIG. 1 is a schematic diagram showing a mixing operation process using a power shovel equipped with a mixing attachment.

The mixing attachment 1 of one embodiment of the present invention will be described with reference to Figures 1 and 2.

The mixing attachment 1 can be attached to the end of the power shovel's arm.

The mixing attachment 1 comprises a frame 2 and two rotors 3, 3 held horizontally within the frame 2.

The rotors 3, 3 are freely rotatable. Although not shown in the figure, for example, hydraulic piping and a hydraulic motor are provided on the frame 2, and the rotors 3, 3 can be driven by this hydraulic motor.

The two rotors 3, 3 are positioned successively further away from the tip of the arm.

Each rotor 3 is roughly cylindrical.

Each rotor 3 has numerous stirring blades 4 extending radially from the central axis of rotation.

In the mixing attachment 1 of this embodiment, compared to the rotation of a single rotor, the rotation of two rotors 3, 3 makes it possible to generate turbulence and mix the in-situ soil, solidification material, and water that are the objects to be mixed in a complex manner by fluidizing them.

A number of stirring blades 4 are arranged in a spiral shape on the side surface of each rotor 3.

This spiral arrangement of numerous stirring blades 4 allows the fluidized stirring object to move in a direction parallel to the central axis of rotation of the rotor 3 when the two rotors 3, 3 rotate within the frame 2.

The length from the central axis of rotation to the tip of the agitating blade of the two rotors 3, 3 is different for each rotor. In more detail, the length from the central axis of rotation to the tip of the agitating blade of the rotor 3 closest to the tip of the arm is shorter than the length from the central axis of rotation to the tip of the agitating blade of the rotor 3 farthest from the tip of the arm. In Figure 2, the rotors 3, 3 shown by dashed lines and the dashed line that is concentric with them are the trajectories of the tips of the agitating blades 4 of each of the rotors 3, 3.

As shown by the dashed double-dashed arrows A and B in Figure 2, the two rotors 3, 3 rotate in opposite directions around the central axis of rotation.

Although not shown in the figure, the mixing attachment 1 is provided with a liquid outlet so that water, cement milk, etc. can be added as needed.

The process of performing in situ mixing using a power shovel with the mixing attachment 1 of this embodiment attached to the end of its arm will be described with reference to Figures 3 and 4.

First, as shown in FIG. 3(a), a power shovel equipped with a normal bucket 10 is used to excavate the surface of the area to be mixed. Next, as shown in FIG. 3(b), solidification material and water are poured into the excavated space. The normal bucket 10 is removed from the end of the power shovel's arm, and a mixing attachment 1 is attached. Next, as shown in FIG. 4(a), the boom, arm, and mixing attachment 1 are moved up, down, left, and right within the area to be mixed, and the original soil, solidification material, and water within the area to be mixed are mixed with the mixing attachment 1. Finally, the mixing attachment 1 is removed from the end of the power shovel's arm, and a normal bucket 10 is attached. As shown in FIG. 4(b), the top edge of the area mixed with the normal bucket 10 is shaped.

Angle sensors may be provided on the boom, arm, mixing attachment 1 and upper rotating body of the power shovel, rotation sensors may be provided on the rotors 3, 3 and a flow rate sensor may be provided at the liquid outlet. In FIG. 4(a), based on the measurement data from each sensor, it can be confirmed whether appropriate mixing has been performed within the intended mixing range.

In the above embodiment, the mixing attachment 1 is described as having a frame body 2 and two rotors 3, 3 held horizontally within the frame body 2, but the frame body 2 may have three or more rotors.

In the above embodiment, the length from the central axis of rotation of the rotor closest to the tip of the arm to the tip of the stirring blade is shorter than the length from the central axis of rotation of the rotor farthest from the tip of the arm to the tip of the stirring blade, but the length from the central axis of rotation of the rotor closest to the tip of the arm to the tip of the stirring blade may be longer than the length from the central axis of rotation of the rotor farthest from the tip of the arm to the tip of the stirring blade.

In the above embodiment, each rotor 3 is described as being substantially cylindrical, but this is not limited thereto. Each rotor may also be substantially prismatic.

In the above embodiment, the stirring blade 4 is described as having the shape shown in FIG. 1, but this is not limited to this. The stirring blade may have various shapes that can improve the stirring efficiency.

1 Mixing attachment 2 Frame 3 Rotor 4 Mixing blade 10 Normal bucket

The present invention relates to a mixing attachment that can be attached to the end of a power shovel's arm to mix and stir on-site soil, solidification materials or soil purification chemicals, and water.

A method is known for mixing and stirring on-site soil, solidifying material, and water for ground improvement. Another method is known for mixing and stirring on-site soil, soil purification chemicals, and water for soil purification. One example of a machine that can perform mixing and stirring is a power shovel with a mixing attachment attached to the end of its arm. The mixing attachment mixes and stirs by rotating agitating blades.

One such mixing attachment is shown in Patent Document 1. A rotor with mixing blades is provided inside the bucket body.

JP 2011-047155 A

In the mixing attachment of Patent Document 1, the stirring blades rotate within the space surrounded by the bucket body, so depending on the geology and mixing conditions, the stirring blades and the soil and sand may rotate together within the bucket body, causing uneven mixing.

There is also a demand for the mixing range of a power shovel to be wider and deeper. However, if the mixing attachment becomes heavier, it becomes necessary to attach a counterweight to the power shovel to ensure safety during operation. Attaching a counterweight increases the energy required for the lower running body to travel and the upper rotating body to rotate. Furthermore, the weight of the mixing attachment reduces the stability of the power shovel to which it is attached, increasing the possibility of it tipping over during operation. Therefore, there is a problem in that it is desirable to avoid increasing the weight of the mixing attachment as much as possible.

In particular, when mixing on-site soil and sand, the process is as follows. First, over-digging is done with a power shovel equipped with a regular bucket, and water, chemicals, etc. are added. Next, the regular bucket is removed, and the material is mixed and mixed with a power shovel equipped with a mixing attachment. Next, the mixing attachment is removed, and the top is formed again with a power shovel equipped with a regular bucket. Therefore, when all processes are performed with one power shovel, the stability of a single power shovel can be consistently maintained throughout the entire process by minimizing the weight difference between the regular bucket and the mixing attachment.

Therefore, the present invention aims to provide a mixing attachment that improves mixing efficiency while minimizing weight.

The mixing attachment of claim 1 of the present invention is a mixing attachment that can be attached to the end of the arm of a power shovel, and comprises a frame body, and a plurality of rotors whose central axis of rotation is held horizontally and have stirring blades , the frame body is provided with hydraulic piping and a hydraulic motor, and the hydraulic motor drives the plurality of rotors, each of which is provided at a position successively farther away from the tip of the arm , the length from the central axis of rotation of the rotor to the tip of the stirring blade differs for each rotor, and a claw is provided at the tip of the frame body.

The mixing attachment of claim 1, with its above-mentioned configuration, can suppress the co-rotation of the mixing blades and the soil and sand, improving the mixing efficiency. In addition, by adjusting the number of rotors held horizontally according to the power shovel to which it is attached, the weight of the bucket mixing can be suppressed.

In the mixing attachment of claim 1 of the present invention, the length from the axis to the tip of the mixing blade in the radial direction of rotation is different for each rotor.

When mixing soil and sand containing pebbles and large gravel, the pebbles and large gravel may be present between the blades of different rotors. The mixing attachment of claim 1 discharges the pebbles and large gravel from between the blades of different rotors due to the difference in torque at the tip of each blade. This prevents the blades from stopping rotating due to pebbles and large gravel getting caught between the blades of different rotors.

The mixing attachment of claim 2 is the mixing attachment of claim 1, wherein the length from the central axis of rotation to the tip of the stirring blade of the rotor closest to the tip of the arm is shorter than the length from the central axis of rotation to the tip of the stirring blade of the rotor furthest from the tip of the arm.

A mixing attachment according to a third aspect of the present invention is the mixing attachment according to either the first or second aspect , wherein adjacent rotors rotate in opposite directions about the central rotation axis.

The mixing attachment according to claim 3 of the present invention has the same advantageous effects as those of claim 1 or 2 , and in addition, can generate turbulence within the object to be stirred, thereby improving the efficiency of stirring and mixing.

The invention of any one of claims 1 to 3 can achieve both improved stirring and mixing efficiency and reduced weight.

FIG. 2 is a front view of a mixing attachment according to one embodiment of the present invention. FIG. 2 is a schematic side view of the mixing attachment of FIG. 1. FIG. 1 is a schematic diagram showing a mixing operation process using a power shovel equipped with a mixing attachment. FIG. 1 is a schematic diagram showing a mixing operation process using a power shovel equipped with a mixing attachment.

The mixing attachment 1 of one embodiment of the present invention will be described with reference to Figures 1 and 2.

The mixing attachment 1 can be attached to the end of the power shovel's arm.

The mixing attachment 1 comprises a frame 2 and two rotors 3, 3 held horizontally within the frame 2.

The rotors 3, 3 are freely rotatable. Although not shown in the figure, for example, hydraulic piping and a hydraulic motor are provided on the frame 2, and the rotors 3, 3 can be driven by this hydraulic motor.

The two rotors 3, 3 are positioned successively further away from the tip of the arm.

Each rotor 3 is roughly cylindrical.

Each rotor 3 has numerous stirring blades 4 extending radially from the central axis of rotation.

In the mixing attachment 1 of this embodiment, compared to the rotation of a single rotor, the rotation of two rotors 3, 3 makes it possible to generate turbulence and mix the in-situ soil, solidification material, and water that are the objects to be mixed in a complex manner by fluidizing them.

A number of stirring blades 4 are arranged in a spiral shape on the side surface of each rotor 3.

This spiral arrangement of numerous stirring blades 4 allows the fluidized stirring object to move in a direction parallel to the central axis of rotation of the rotor 3 when the two rotors 3, 3 rotate within the frame 2.

The length from the central axis of rotation to the tip of the agitating blade of the two rotors 3, 3 is different for each rotor. In more detail, the length from the central axis of rotation to the tip of the agitating blade of the rotor 3 closest to the tip of the arm is shorter than the length from the central axis of rotation to the tip of the agitating blade of the rotor 3 farthest from the tip of the arm. In Figure 2, the rotors 3, 3 shown by dashed lines and the dashed line that is concentric with them are the trajectories of the tips of the agitating blades 4 of each of the rotors 3, 3.

As shown by the dashed double-dashed arrows A and B in Figure 2, the two rotors 3, 3 rotate in opposite directions around the central axis of rotation.

Although not shown in the figure, the mixing attachment 1 is provided with a liquid outlet so that water, cement milk, etc. can be added as needed.

The process of performing in situ mixing using a power shovel with the mixing attachment 1 of this embodiment attached to the end of its arm will be described with reference to Figures 3 and 4.

First, as shown in FIG. 3(a), a power shovel equipped with a normal bucket 10 is used to excavate the surface of the area to be mixed. Next, as shown in FIG. 3(b), solidification material and water are poured into the excavated space. The normal bucket 10 is removed from the end of the power shovel's arm, and a mixing attachment 1 is attached. Next, as shown in FIG. 4(a), the boom, arm, and mixing attachment 1 are moved up, down, left, and right within the area to be mixed, and the original soil, solidification material, and water within the area to be mixed are mixed with the mixing attachment 1. Finally, the mixing attachment 1 is removed from the end of the power shovel's arm, and a normal bucket 10 is attached. As shown in FIG. 4(b), the top edge of the area mixed with the normal bucket 10 is shaped.

Angle sensors may be provided on the boom, arm, mixing attachment 1 and upper rotating body of the power shovel, rotation sensors may be provided on the rotors 3, 3 and a flow rate sensor may be provided at the liquid outlet. In FIG. 4(a), based on the measurement data from each sensor, it can be confirmed whether appropriate mixing has been performed within the intended mixing range.

In the above embodiment, the mixing attachment 1 is described as having a frame body 2 and two rotors 3, 3 held horizontally within the frame body 2, but the frame body 2 may have three or more rotors.

In the above embodiment, the length from the central axis of rotation of the rotor closest to the tip of the arm to the tip of the stirring blade is shorter than the length from the central axis of rotation of the rotor farthest from the tip of the arm to the tip of the stirring blade, but the length from the central axis of rotation of the rotor closest to the tip of the arm to the tip of the stirring blade may be longer than the length from the central axis of rotation of the rotor farthest from the tip of the arm to the tip of the stirring blade.

In the above embodiment, each rotor 3 is described as being approximately cylindrical, but this is not limited thereto. Each rotor may also be approximately prismatic.

In the above embodiment, the stirring blade 4 is described as having the shape shown in FIG. 1, but this is not limited to this. The stirring blade may have various shapes that can improve the stirring efficiency.

1 Mixing attachment 2 Frame 3 Rotor 4 Mixing blade 10 Normal bucket

Claims (3)

A mixing attachment that can be attached to the tip of an arm of a power shovel,
The apparatus comprises a frame and a plurality of rotors each having a horizontal central axis of rotation and agitating blades.
A mixing attachment, characterized in that the multiple rotors are each provided at positions progressively further away from the tip of the arm. The mixing attachment according to claim 1, characterized in that the length from the rotor's central axis of rotation to the tip of the mixing blade is different for each rotor. The mixing attachment according to claim 1 or 2, characterized in that adjacent rotors rotate in opposite directions around the central axis.

Images