JPH07279196A - Excavated soil pumping device - Google Patents

Abstract

PURPOSE:To cleanly and safely perform excavated soil pumping work at high speed without generating any noise or vibration. CONSTITUTION:The excavated earth and sand transferred into a chamber 35 by a screw conveyor device 34 is alternately sucked and extruded by force-feed cylinders 36, 37. The excavated earth and sand is selectively force-fed to a curbed pipe 46 by piston pump devices 40, 41, and the earth and sand in the chamber 35 is continuously force-fed to a pipe line 44 through the curved pipe 46, whereby the earth and sand is discharged, and the excavated soil pumping work can be cleanly and safety performed at high speed without generating any noise or vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to excavation of underground soil and transport of excavated soil to the ground, for example, excavation of an all casing type boring machine for excavating a vertical shaft in the ground and excavation of excavated soil. Relief equipment.

[0002]

2. Description of the Related Art When constructing a vertical shaft used for excavation, maintenance, inspection, etc. of a horizontal shaft installed in the ground, a casing tube is pushed into the ground by using an all-casing type boring machine, and a hole for the vertical shaft is formed by the casing tube. The wall is maintained, and the earth and sand in the casing tube are excavated and discharged (excavated).

An all-casing boring machine having a conventional excavation and excavation device will be described with reference to FIG. FIG. 3 shows the overall configuration of an all-casing boring machine equipped with a conventional excavation and excavation device.

The main body 2 of the all-casing type boring machine 1 can be moved to an arbitrary position on the ground 3 by a running body (not shown). The main body 2 is provided with a holder 5 for holding the casing tube 4. The casing tube 4 is held by the holder 5 and is pushed into the ground while being swung or swung by the driving of the holder 5. Body 2
A crane 6 is installed in the vicinity of, and a wire 7 is wound around the crane 6 via a pulley. Wire 7
A grab bucket 8 which is an excavating and hoisting device is suspended from the tip of the grab bucket, and the grab bucket 8 is located above the casing tube 4. The grab bucket 8 is provided with a grab 9, and the grab 9 can store the earth and sand in the casing tube 4 in the grab bucket 8. In the figure, reference numeral 10 is a reaction force base 11 for receiving the excavation reaction force.
Is a counterweight, 12 is a truck for transporting earth and sand, 13 is a power unit, and 14 is a casing tube piece.

Next, the operation of the all-casing boring machine having the above construction will be described. By driving the holder 5, the casing tube 4 is pushed into the ground while swinging or turning. Edge of casing tube 4 is ground 3
The wire 7 by operating the winch after
And the glove bucket 8 is dropped by its own weight to excavate. When the wire 7 is pulled up by operating the winch after the grab bucket 8 has dropped, the grab 9 starts to close,
By further pulling up the wire 7, the grab 9 is closed and the excavated earth and sand is stored in the grab bucket 8.
After pulling up the grab bucket 8, the grab bucket 8 is moved to the upper part of the truck 12, the grab 9 is opened, and the earth and sand are reloaded on the truck 12. By repeating this operation, the casing tube 5 is pushed to a predetermined depth, the earth and sand in the casing tube 5 are excavated and excavated, and the boring is completed.

[0006]

In the conventional excavation and hoisting device using the grab bucket 8, the ground 3 is excavated by dropping the grab bucket 8, the excavated earth and sand are scooped up by the grab bucket 8, and further the earth and sand are scooped. Since the grab bucket 8 thus taken is repeatedly moved to the ground and carried out, there are the following problems. 1. Since it is necessary to carry out work in order, one step at a time, from excavation to soil removal, each step is carried out intermittently, resulting in very poor efficiency. 2. As the excavation depth increases, the pulling time of the grab bucket 8 by the operation of the winch becomes longer, which further deteriorates the work efficiency. 3. Since the excavation is performed using the gravity falling force of the grab bucket 8, shock vibration occurs when the grab bucket 8 collides with the ground, which may cause harm to the surrounding vibration. 4. In order to transfer the earth and sand to another place, it is necessary to reload the earth and sand lifted by the grab bucket 8 into the truck 12, and dust is generated and the truck 12 and many workers are required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an excavation and excavation device capable of continuously excavating and excavating the ground without causing a large shock vibration. To do.

[0008]

Means for Solving the Problems In order to achieve the above object, the structure of the present invention is such that, in an excavating and hoisting device for excavating underground ground and carrying excavated soil to the ground, the tip of a rotatable casing is provided. A cutter disk is provided, and a screw conveyor device for transferring the earth and sand excavated by the cutter disk is installed inside the casing, and the earth and sand transferred by the screw conveyor device inside the casing at the discharge part of the screw conveyor device. Is formed in the casing, and a piston pump device for sucking the earth and sand in the chamber into the pressure feeding cylinder and pushing the earth and sand in the pressure feeding cylinder to the chamber side is provided inside the casing, and the base end is a pipe for earth and sand discharge. It communicates with the line and its tip communicates with the pumping cylinder of the piston pump device. A bendable pipe that can be turned is provided in the casing so as to be rotatable about the axis of the casing, and the tip of the bend pipe is driven when the earth and sand in the pressure feeding cylinder are pushed out by being driven in association with the operation of the piston pump device. The casing is provided with a drive device for rotating the bent pipe in a state of communicating with the pressure feeding cylinder.

[0009]

The excavation is performed by the cutter disk by rotating the casing, and the excavated earth and sand is transferred into the chamber by the screw conveyor device. The operation of the piston pump device and the drive of the drive device are interlocked,
When sucking earth and sand into the pressure-feed cylinder, the bent tube is turned so that the tip of the bend tube is not in communication with the pressure-feed cylinder to suck the earth and sand into the chamber, and when pushing the earth-and-sand into the pressure-feed cylinder, The bent pipe is rotated so that the tip end communicates with the pressure feeding cylinder, and the earth and sand in the chamber is pressure-fed to the earth and sand discharge pipeline through the bent pipe to continuously discharge the earth and sand.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cross section of an excavating and hoisting device according to an embodiment of the present invention, and FIG. 2 shows the overall construction of an all-casing boring machine equipped with the excavating and hoisting device.

First, an all-casing boring machine will be described with reference to FIG. The main body 22 of the all-casing type boring machine 21 can be moved to an arbitrary position on the ground 24 by the traveling body 23. Body 22
A casing tube 2 as a casing at the front of the
A slewing device 26 is provided for holding 5 so that it can swivel and push, and the casing tube 25 is held by the slewing device 26 and driven by the slewing device 26 to be pushed into the ground while swiveling. A guide 27 is provided upright on the main body 22, and a drive device 28 is supported on the guide 27 so as to be vertically movable. A drive shaft 30 of an excavation and excavation device 29 (see FIG. 1; details will be described later) is supported by the drive device 28, and the drive shaft 30 is driven by the drive device 28.

The excavation and excavation device 29 will be described with reference to FIG. A cutter disk 31 is attached to the tip (lower end in the figure) of the casing tube 25, and a tubular portion 32 is formed at the axial center of the tip portion of the casing tube 25. The drive shaft 30 of the excavation and excavation device 29 is arranged along the axial center of the casing tube 25, and the drive shaft 30 penetrates the tubular portion 32 of the casing tube 25. A spiral blade 33 is attached to the drive shaft 30 in the cylindrical portion 32, and a screw conveyor device 34 is formed by the tip portion of the drive shaft 30 to which the blade 33 is attached. A chamber 35 is formed in the casing tube 25 at the rear (upper side in the drawing) of the screw conveyor device 34,
When the drive shaft 30 is driven and rotated, the excavated soil carried by the blades 33 of the screw conveyor device 34 is carried into the chamber 35. A pressure pump cylinders 36 and 37 are provided outside the cylinder portion 32 of the casing tube 25 (left and right direction of the cylinder portion 32 in the drawing), and the pressure pump cylinders 36 and 37 are driven by hydraulic cylinders 38 and 39, respectively. 40 and 41 are provided. By driving the piston pump devices 40 and 41, the pressure feeding pistons 42 and 43 reciprocate in the pressure feeding cylinders 36 and 37 (up and down movement in the drawing).
When the pressure feeding pistons 42, 43 move downward in the figure, the excavated earth and sand in the chamber 35 is sucked into the pressure feeding cylinders 36, 37, and when the pressure feeding pistons 42, 43 move upward in the figure, the pressure feeding cylinders 36, 37. The excavated soil in the inside is extruded toward the chamber 35.

On the other hand, at the axial center of the casing tube 25, a pipeline 44 for conveying the excavated earth and sand to the ground and discharging it.
Are arranged, and the drive shaft 30 is in a state of penetrating the pipeline 44. A bent pipe 46 is supported at the lower end of the pipeline 44 via a swivel joint 45 so as to be rotatable (rotatable) about the axis of the casing tube 25, and the tip (lower end in the figure) of the bent pipe 46 is a pressure feed cylinder. It faces the upper end of 36 (37). The drive shaft 30 penetrates the bent pipe 46, and
Are rotatable with respect to the drive shaft 30. When the bent tube 46 rotates with respect to the casing tube 25, the tip of the bent tube 46 selectively opposes the upper end of the pressure feeding cylinder 36 or the pressure feeding cylinder 37. A donut-shaped valve plate 4 is provided at the tip of the bent pipe 46.
7 is provided, and the screw conveyor device 34 and the chamber 35 are communicated with each other through a hole 47a in the central portion of the valve plate 47. Further, holes 48 and 49 having substantially the same diameter as the inner diameters of the pressure feeding cylinders 36 and 37 are formed in the valve plate 47, and one hole 48 makes the tip end portion of the bent pipe 46 communicate with the pressure feeding cylinder 36 and the other hole 49. Connects the chamber 35 and the pressure feed cylinder 37 (state shown). By rotating the bent pipe 46 by 180 degrees, one end of the bent pipe 46 communicates with the pressure feed cylinder 37, and the other hole 49 connects the chamber 35 with the pressure feed cylinder 36.

A spur gear 50 is attached to the upper portion of the bent tube 46, and a motor 51 is attached to the inside of the casing tube 25, and an output pinion 52 of the motor 51 is attached.
Meshes with the spur gear 50. That is, when the motor 51 is driven, the curved pipe 46 is rotated via the output pinion 52 and the spur gear 50, and the spur gear 50, the motor 51, and the pinion 52 constitute a drive device. Reference numeral 53 in the drawing denotes a casing tube 25 and a bent pipe 46.
Is a bearing for rotatably supporting each other, and 54 is a bearing for rotatably supporting the drive shaft 30 and the bent tube 46.
The drive shaft 30 is hollow, and by supplying high-pressure water from the ground into the drive shaft 30, the nozzle 55 at the tip is
High-pressure jet water 56 is jetted from.

The operation of the excavation and excavation device 29 having the above structure will be described. By driving the turning device 26, the casing tube 2
5 is pushed into the ground while turning and excavation is performed by the cutter disk 31, the drive shaft 30 is rotated, and the excavated earth and sand is dumped into the chamber 35 by the blades 33 of the screw conveyor device 34. Casing tube 25
1 rotates in the counterclockwise direction when viewed from the bottom surface in the state of FIG. 1, the earth and sand excavated by the cutter disk 31 moves to the center side of the cutter disk 31, and the drive shaft 30
1 rotates clockwise when viewed from the bottom surface in the state of FIG. 1, and the excavated earth and sand is dumped into the chamber 35 by the blades 33 of the screw conveyor device 34. Drive shaft 30 during excavation
High-pressure water is supplied to the inside, and high-pressure jet water 56 is jetted from the nozzle 55 at the tip.

In the state shown in FIG. 1, the piston pump device 41 is used.
Is driven to move the pumping piston 43 downward in the pumping cylinder 37, and the excavated soil accumulated in the chamber 35 is sucked into the pumping cylinder 37 through the hole 49 of the valve plate 47. At the same time, the driving of the piston pump device 40 causes the pressure-feeding piston 42 to move upward in the pressure-feeding cylinder 36, so that the excavated earth and sand that has been sucked in in the previous stroke passes through the hole 48 of the valve plate 47 into the bent pipe 46. Pushed out. When the pressure-feeding pistons 42, 43 reach the stroke end, the motor 51 is driven by the control device (not shown), and the bending pipe 46 rotates 180 degrees via the output pinion 52 and the spur gear 50. Bent pipe 46
By rotating 180 degrees, the hole 48 of the valve plate 47 allows the tip of the bent pipe 46 and the pressure feeding cylinder 37 to communicate with each other.
The chamber 35 and the pressure feed cylinder 36 communicate with each other through 9.
In this state, the piston pump device 40 is driven to move the pressure feeding piston 42 downward in the pressure feeding cylinder 36, and the excavated earth and sand accumulated in the chamber 35 is sucked into the pressure feeding cylinder 36 through the hole 49 of the valve plate 47. At the same time, the pumping piston 43 moves upward in the pumping cylinder 37 by the driving of the piston pump device 41, and the excavated earth and sand that has been sucked in in the previous stroke passes from the pumping cylinder 37 through the hole 48 of the valve plate 47 into the bent pipe 46. Pushed out. When the pressure feeding pistons 42 and 43 reach the stroke end again, the bending pipe 46 rotates 180 degrees and returns to the state of FIG. 1 as described above. By moving the pumping pistons 42 and 43 up and down in the pumping cylinders 36 and 37, suction of the excavated soil into the pumping cylinders 36 and 37 and the inside of the bent pipe 46 of the excavated soil in the pumping cylinders 36 and 37 are achieved. Extrusion is sequentially performed, and the excavated earth and sand are extruded into the curved pipe 46 and pressure-fed to the pipeline 44, and the excavated earth and sand are continuously conveyed to the ground.

By repeating the above operation, the excavated earth and sand is transferred into the chamber 35 by the screw conveyor device 34 by the turning of the casing tube 25, and further, the bent pipe 46 is moved by the piston pump devices 40 and 41.
Is sent under pressure to the pipeline 44, and the excavated soil is continuously transported to the ground and discharged.

In the above embodiment, two piston pump devices 40 and 41 are arranged, but if one or more piston pump devices are allowed, three or more piston pump devices can be arranged as long as the space for arrangement allows. . In this case, the curved pipe 46 also has a shape in which a plurality of conduits are joined (for example,
If four piston pump devices are installed, bend pipe 46
Is changed to a Y-shaped tube, and two piston pump devices simultaneously perform a suction operation and a push-out operation), further improving work efficiency. Also, the bent pipe 46
May be swung. In addition, the excavation and hoisting device 29
Supply of hydraulic pressure or the like for driving the engine can be realized by an ordinary piping system by disposing a rotary joint or the like on the ground.

Therefore, by using the above-mentioned excavation and excavation device 29, the underground ground is excavated and excavated continuously and at high speed without generating a large impact vibration that causes pollution.

[0020]

In the excavation and hoisting device of the present invention, a screw conveyor device for transferring the earth and sand excavated by the cutter disk is installed inside the casing, and a chamber into which the earth and sand transferred by the screw conveyor device flows is formed. Then, a piston pump device is installed inside the casing to suck the sediment in the chamber into the pressure-feeding cylinder and to push the soil in the pressure-feeding cylinder toward the chamber.The base end communicates with the sediment discharge pipeline and the tip end is the piston pump. A bending pipe that can communicate with the pump cylinder of the device is rotatably provided in the casing so that the tip of the bending pipe communicates with the pump cylinder when pushing out the sand in the pump cylinder in conjunction with the operation of the piston pump device. Since the casing was equipped with a drive for rotating the bent pipe, the excavated earth It is transferred to the chamber by the conveyor belt, and when the earth and sand are sucked into the pressure-feeding cylinder, the tip of the bent pipe does not communicate with the pressure-feeding cylinder, and the earth-and-sand in the chamber is sucked in. The tip of the pipe communicates with the pressure-feeding cylinder, the earth and sand in the chamber is pressure-fed to the earth and sand discharge pipeline through the curved pipe, and the earth and sand is continuously discharged. As a result, it becomes possible to perform the excavation and excavation work safely, at high speed, without generating noise and vibration.
Also, by installing a pipeline to any place on the ground, it is possible to freely select the discharge place of sediment.

[Brief description of drawings]

FIG. 1 is a sectional view of an excavation and excavation device according to an embodiment of the present invention.

FIG. 2 is an overall view of an all-casing boring machine equipped with an excavation and hoisting device.

FIG. 3 is an overall view of an all-casing boring machine equipped with a conventional excavation and excavation device.

[Explanation of symbols]

 25 casing tube 29 excavation and hoisting device 30 drive shaft 31 cutter disk 34 screw conveyor device 35 chamber 36, 37 pressure feed cylinder 38, 39 hydraulic cylinder 40, 41 piston pump device 42, 43 pressure feed piston 44 pipeline 46 bend pipe 47 valve plate 48, 49 holes 50 spur gear 51 motor 52 pinion

Claims (1)

[Claims] 1. A screw conveyor for excavating an underground ground and carrying out excavated soil to the ground, wherein a cutter disk is provided at a tip of a rotatable casing and the excavated soil is transferred by the cutter disk. The apparatus is installed inside the casing, and a chamber into which the earth and sand transferred by the screw conveyor device flows is formed inside the casing in the discharge part of the screw conveyor apparatus, and the earth and sand in the chamber is fed into a pressure feeding cylinder. Provided inside the casing is a piston pump device that sucks in and pushes out the soil in the pressure feeding cylinder toward the chamber side, the base end of which communicates with a pipeline for discharging sand and the tip of which can communicate with the pressure feeding cylinder of the piston pump device. The curved pipe is rotatably supported around the casing axis. A drive device that is provided in the sing and is driven in conjunction with the operation of the piston pump device and that rotates the bent pipe in a state in which the tip of the bent pipe communicates with the pump cylinder when pushing out the earth and sand in the pump cylinder. An excavating and excavating device, wherein: the casing is provided in the casing.