JPH0246548Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an excavation device, and particularly to an excavation device suitable for excavating rock, soil, etc. and collecting samples thereof.

(Prior art) In this type of excavation equipment, it is necessary to drive the excavation tube rotatably to propel it into the soil or pull it out from the soil, and at the same time, it is necessary to cool the cutter at the tip of the excavation tube and at the same time Pressurized water must be supplied to wash away any debris that has become stuck in the machine.

Conventionally, it has been proposed that the output of a single prime mover is guided through a mechanical transmission mechanism and used for the rotational force of the excavation tube, its propulsion and extraction force, and the supply force of pressurized water. However, the problem was that the propulsion speed of the drilling tube was constant and it was not possible to obtain a propulsion speed commensurate with the excavation load, resulting in low excavation efficiency.

(Means for solving the problem) The present invention was proposed to solve the above problem, and its gist is a single prime mover and a water pump driven by this prime mover. a pump, an excavation tube to which pressurized water from the water pump is supplied and rotationally driven by the prime mover; and an excavation tube that expands and contracts by supplying and discharging pressurized water from the water pump to move the excavation tube up and down. A drilling rig is characterized in that it is equipped with a hydraulic cylinder.

(Example) The present invention will be specifically described with reference to an example shown in the drawings. Reference numeral 1 denotes a prime mover such as an electric motor installed in the body 12 of the excavation equipment, 9 a water pump driven by the prime mover 1, and 8 a water pump to which pressurized water is supplied from the water pump 9 and rotated by the prime mover 1. Drilled tube 11 is a water pump 9
This is a hydraulic cylinder that expands and contracts to move the excavation tube 8 up and down by supplying and discharging pressurized water. A gear box 10 is fixed to the hydraulic cylinder 11, and the gear box 10 houses gears 5, 6, and 7 that mesh with each other. The gear 5 is wedged to the transmission shaft 4 so that it can move relative to it in the axial direction but cannot rotate relative to it.
The gear 6 is wedged to the excavation tube 8, and the gear 7 is wedged to the rotating shaft 9a of the water pump 9. The transmission shaft 4 is supported by the body 12 via the bearing 3 and extends vertically, and is connected to the piston rod 11a of the hydraulic cylinder 11.
is supported at its upper and lower ends by the fuselage 12 and extends vertically, and the excavation tube 8 is supported by the gear box 10 so that it cannot move relative to it in the axial direction but can rotate relative to it and extends up and down, and these transmission shafts 4 and piston rods 11a and the excavation tube 8 extend vertically in parallel. The vertically movable parts such as the gear box 10 and the hydraulic cylinder 11 are locked to the body 12 by locking means (not shown) when not in operation.

When excavating soil or the like, the locking devices of the vertically movable parts are released and the prime mover 1 is rotated in the normal direction. Then, the power of the prime mover 1 is transmitted to the gear 5 via the bevel gear 2 and the transmission shaft 4, and by rotating the gear 6 that meshes with the gear 5, the excavation tube 8 is rotationally driven. By rotating the gear 7 that meshes with the gear 6, the water pump 9 is also rotated forward at the same time. Then, the water pump 9 sucks water through the check valve 13a, pressurizes it, and then discharges it through the check valve 13c. This pressure water passes through the flexible pipe 14 to the relief valve 21 installed therein.
After the pressure is regulated to a constant pressure, it reaches a three-position, four-way port switching valve 19 that is remotely controlled. During excavation, this switching valve 19 is switched to position 19a, so that pressurized water is supplied from the switching valve 19 to the excavation tube 8 via the flexible pipe 15 and the connecting hardware 22, and is sent to the cutter section at the lower end. On the other hand, a portion of the pressure water enters the push side chamber 11b of the hydraulic cylinder 11 via the flexible tube 17 branching from the flexible tube 15, and pushes the hydraulic cylinder 11 downward. On the other hand, the water in the pull-side chamber 11c of the hydraulic cylinder 11 passes through the flexible pipe 16 and the throttle 20a of the check valve-equipped flow rate regulating valve 20 installed therein, the flow rate of which is controlled, and then passes through the switching valve 19 to the discharge pipe 18. is discharged from. Hydraulic cylinder 11
Gear box 10 fixed to this as it moves downward
The excavation tube 8 is pivotally supported by the gear box 10 and is pushed downward. In this way, the excavation tube 8 is rotated while being pushed downward, and the cutter portion at the lower end excavates the soil or bedrock while being supplied with pressurized water.

When pulling out the excavation tube 8 from the soil, use the prime mover 1.
is reversed, and the switching valve 19 is switched to position 19b. Then, the excavation tube 8 and the water pump 9 are reversed, and the water pump 9 sucks water through the check valve 13d, pressurizes it, and then discharges it through the check valve 13b. This pressure water is then transferred to the flexible pipe 14 and the switching valve 1.
9. Pass through the flexible pipe 16 and the check valve 20b of the flow rate adjustment valve 20 with a check valve in this order, enter the pull side chamber 11c of the hydraulic cylinder 11, and pull the hydraulic cylinder 11 upward. At this time, the push side chamber 1 of the hydraulic cylinder 11
The water in 1b is discharged through flexible pipes 17 and 15, a switching valve 19, and a discharge pipe 18. When the hydraulic cylinder 11 is pulled upward, the excavation tube 8 pivotally supported by the gear box 10 is pulled out of the soil via the gear box 10 fixed thereto.

Therefore, in the device of the above embodiment, the weight of the vertically movable portion and the pushing side chamber 11 of the hydraulic cylinder 11 are
Since the water pressure supplied into b is kept constant, the driving force of the excavation tube 8 during excavation is almost constant,
Therefore, a propulsion speed commensurate with the excavation load can be obtained, allowing efficient excavation.

In addition, since the propulsion speed of the excavation tube 8 is low, the energy consumed by the hydraulic cylinder 11 is extremely small, and therefore, almost all of the energy of the water pump 9 is used to cool the cutter and cut the cut that is stuck between the cutter blades. Can be used to wash away debris.

Furthermore, when the excavation tube 8 is pulled out, the water pump 9 is reversed as the electric motor 1 is reversed;
Four sets of check valves 13a, 13b, 13c, and 13d provided on the suction side and the discharge side of the pump make it possible to always discharge pressurized water in a fixed direction.

In addition, since the transmission shaft 4 and the piston rod 11a of the hydraulic cylinder 11 can be used to guide the vertical movement of the excavation tube 8, the apparatus becomes simple and compact.

In addition, when pulling out the excavation tube 8 from the soil,
When there is no need to reverse this, there is no need to reversely rotate the prime mover 1, and furthermore, the check valves 13a, 1
3b, 13c, and 13d are also unnecessary. If it is desirable to stop the rotation of the excavating tube 8 when it is pulled out, a power coupling/disconnecting clutch or a one-way clutch may be interposed between the gear 6 and the excavating tube 8. Further, in the above embodiment, the piston rod 11a of the hydraulic cylinder 11 is fixed to the body 12, but the hydraulic cylinder 11 may be fixed to the body 12, and the gear box 10 may be fixed to the piston rod 11a.

(Operations and Effects of the Invention) Although the embodiments have been described above, the device of the present invention includes a single prime mover, a water pump driven by this prime mover, pressure water is supplied from this water pump, and the above-mentioned It is equipped with a drilling tube that is rotationally driven by a prime mover, and a hydraulic cylinder that expands and contracts by supplying and discharging pressurized water from the water pump to move the digging tube up and down. This not only allows the drilling tube to be rotated, but also to move it up and down, and it is also possible to supply pressurized water to the drilling tube. In addition, since the excavation tube is moved up and down by expanding and contracting the hydraulic cylinder, a constant propulsive force can be applied during excavation, and therefore a propulsion speed can be obtained in accordance with the excavation load, and excavation efficiency can be improved.

[Brief explanation of the drawing]

The drawing is a schematic side view showing one embodiment of the present invention. 1... Prime mover, 9... Water pump, 8... Drilling tube, 11... Water pressure cylinder.

Claims (1)

[Scope of utility model registration request] A single prime mover, a water pump driven by the prime mover, a drilling tube to which pressurized water from the water pump is supplied and rotationally driven by the prime mover, and pressurized water from the water pump. A drilling device comprising a hydraulic cylinder that expands and contracts by supplying and discharging water to move the drilling tube up and down.