JPH10339091A - Mud water type shield machine with built-in gravel crusher and mud water shielding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mud water type shield machine equipped with a built-in gravel crusher, capable of being installed almost without any need of remodeling a facility in the case of a general mud water type shield machine, and a mud water shielding method. SOLUTION: A gravel crusher made of a screw conveyor 22 to collect and stack gravel R, as well as a cone crusher 23 to crush the gravel R is detachably mounted at the position of a mud discharge pipe 5. Also, a slide jack 26 is installed for causing the crusher to slide. For excavating the ordinary earth free from the gravel R, the slide jack 26 is contracted and are screw conveyor 22 and the cone crusher 23 are made to retreat. Then, excavated sediment and mud water are forcibly sent to the ground directly via the mud discharge pipe 5 on the operation of a pump. For excavating the earth containing gravel R, the slide jack 26 is expanded and the screw conveyor 22 and the cone crusher 23 are made to advance. Then, the excavated sediment, mud water and gravel type earth are collected and stacked on the screw conveyor 22. Thereafter, the gravel R is crushed with the cone crusher 23, and the excavated sediment, mud water and the crushed gravel type earth (r) are forcibly transferred to the ground via the mud discharge pipe 5 on the operation of the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy shield machine and a muddy shield method capable of continuously excavating a gravel ground in a muddy shield method for civil engineering work.

[0002]

2. Description of the Related Art At present, a muddy water shield excavation method compatible with gravel ground (a method incorporating a gravel treatment facility inside a shield machine)
Examples of such methods include (a) trommel method, (b) crusher method (rotary crusher method, jaw crusher method, and vessel method), (c) rotary valve method, and (d) disk cutter method.

[0003] However, in any of the methods, it is difficult to continuously treat a large amount of gravel in the chamber, and large-scale equipment is required. The equipment is complicated and has many failures. Equipment was required twice.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the conventional mud shield digging method, and has a small equipment capacity and a simple equipment.
Also, to provide a muddy shield machine with built-in gravel crushing equipment and a muddy shield method that can be installed with almost no modification of ordinary muddy shield machines, which is a combination of existing equipment and has high reliability. It is intended for.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a mud pipe and a mud pipe are connected to a chamber provided at the rear of a cutter head, and muddy water is fed into the chamber through the mud pipe, and the cutting earth and sand in the chamber is provided. And pump muddy water through the drain pipe to the ground,
In a muddy shield machine that excavates the ground, a gravel crushing device consisting of a screw conveyor that accumulates gravel and a cone crusher that crushes gravel is detachably attached to the position of the mud pipe,
A muddy water shield machine with a built-in gravel crushing device comprising a slide jack for moving the gravel crushing device forward and backward.

In practicing the present invention, an agitator for stirring muddy water in the chamber is provided in the chamber. Further, if the length of the agitator blade is variable, the work efficiency can be further increased.

[0007] Further, open / close valves are respectively provided on the sludge pipes on the upstream and downstream sides of the cone crusher of the gravel crushing device, and the gravel crushing device can be removed at the positions of the valves.

[0008] With the muddy water shield machine built in such a pebble crushing device, during normal earth excavation without gravel, the slide jack is contracted to retract the screw conveyor and the cone crusher, and the cut sediment and muddy water are directly passed through a mud pipe. Pumping to the ground, and when proceeding with gravel soil, extend the slide jack to advance the screw conveyor and cone crusher, accumulate cutting soil, muddy water and gravel soil with a screw conveyor, crush the gravel with a cone crusher, and cut Pump the soil, muddy water and crushed conglomerate to the ground via a mud pipe.

The apparatus includes a screw conveyor, a cone crusher, and a motor for driving the screw conveyor and the cone crusher. The equipment has a small capacity, the equipment is simple, and a combination of existing equipment and reliability. It can be installed with almost no modification if it is a general muddy shield machine.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a normal soil excavation by a mud shield excavator. A mud feed pipe 4 and a mud discharge pipe 5 are provided in a chamber 3 provided between a partition wall 2 behind a cutter head 1. Then, the muddy water is sent into the chamber 3 through the mud pipe 4, the cut soil and muddy water in the chamber 3 are pumped to the ground via the mud pipe 5, and the ground is excavated by the bit of the cutter head 1. An agitator 6 is provided in the chamber 3 to stir muddy water in the chamber 3. Details of the agitator 6 will be described later. In addition, 7 is a motor for driving the cutter head 1, 8 is a motor for driving the agitator 6, 9A and 9B are opening / closing valves provided in the mud pipe 5, 1
0 is a propulsion jack and 11 is a segment.

FIG. 2 shows a state in which the muddy water shield excavator excavates for gravel. The muddy drain portion between the open / close valves 9A and 9B is removed, and a gravel crushing device indicated generally by 20 is attached to the portion.

FIG. 3 shows the details of the gravel crushing device 20. The gravel crushing device 20 is detachably connected to the sludge pipe 5 by bolts 21 between the open / close valves 9A and 9B. The gravel crushing apparatus 20 includes a screw conveyor 22 for accumulating gravel, a cone crusher 23 for crushing gravel, a slide jack 26 for moving the screw conveyor 22 and the cone crusher 23 forward and backward, and the like. In addition, 27 is a guide pipe, and 28 is a seal.

FIG. 4 shows the inside of the cone crusher 23, wherein the crusher body 23A is eccentric with respect to the outer tube 23B.

FIG. 3 shows the state of the gravel crushing device 20 when the excavated soil contains gravel, and the slide jack 26 is extended to extend the screw conveyor 22 and the cone crusher 23 by the length S. We are moving forward. On the other hand, FIG. 5 shows the state of the gravels crushing apparatus 20 when the excavated soil contains no gravels when the ordinary digging is performed. The slide jack 26 is contracted so that the screw conveyor 22 and the cone crusher 23 have a length S. Only retreat.

If abnormal soil / water pressure is applied to the chamber 3, the soil / water pressure can be shut off by closing the valves 9A and 9B. In the ground where the gravel crushing device 20 is unnecessary, the valve 9
Remove between A and 9B.

Next, a processing flow of gravel will be described with reference to FIGS.

The gravel R is cut by the bit of the cutter head 1 and enters the chamber 3 filled with muddy water.
(FIG. 6) The gravel R that has entered the chamber 3 is stirred by the agitator 6 and the cutter head 1 and is conveyed to the exhaust port 5A. (FIG. 7) The gravel R collected at the mud discharge port 5A is transported by the screw conveyor 22 to the corn crusher 23 where it is crushed. The crushed rubble r is transported to the ground by a pressure pump through the drainage pipe 5 and separated as earth and sand.

The working efficiency can be increased by making the length of the blades of the agitator 6 variable. FIG. 9 shows a state in which the blade 13 is extended by the jack 12, and FIG.
A state where the blades 13 are contracted is shown. In a state where the blades 13 are contracted, the screw conveyor 22 can be extended into the chamber 3. 14 is a spare tube.

[0019]

The muddy water shield machine with built-in gravel crushing device according to the present invention is a facility for continuously crushing gravel at a high speed and enabling fluid transport, and is used in combination with general-purpose equipment. Therefore, the following effects can be obtained. (1) The price is low. (2) High reliability because it is a general-purpose machine. (3) Since it is a general-purpose machine, it is easy to gather engineers for parts supply and repair in case of failure. (4) When not used, it can be removed. (5) When used, it may be set at a fixed position.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a muddy water shield machine with a pebble crusher removed.

FIG. 2 is a schematic side view of a muddy water shield machine with a gravel crusher attached.

FIG. 3 is a detailed side view of the crushing device with the screw conveyor and the cone crusher advanced.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a detailed side view of the crushing device with the screw conveyor and the cone crusher retracted.

FIG. 6 is a schematic side view of a muddy shield machine in which gravel is cut by a cutter bit and put into a chamber filled with muddy water.

FIG. 7 is a schematic side view of a muddy water shield machine in a state in which gravel entering a chamber is stirred by an agitator and a cutter head and is carried to an outlet of a mud drain.

FIG. 8 is a detailed side view of the gravel crusher in a state in which the gravel collected in the sludge pipe is carried by a screw conveyor to a corn crusher and crushed.

FIG. 9 is a detailed plan view showing a state where blades of the agitator are extended.

FIG. 10 is a detailed plan view showing a state where blades of the agitator are contracted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cutter head 2 ... Partition wall 3 ... Chamber 4 ... Mud pipe 5 ... Drain pipe 6 ... Agitator 7 ... Motor 8 ... Motor 9A, 9B ...・ Valve 10 ・ ・ ・ Propulsion jack 11 ・ ・ ・ Segment 12 ・ ・ ・ Jack 13 ・ ・ ・ Blade 14 ・ ・ ・ Spare tube 20 ・ ・ ・ Green crusher 21 ・ ・ ・ Bolt stop 22 ・ ・ ・ Screw conveyor 23 ・..Cone crusher 24 ・ ・ ・ Motor 25 ・ ・ ・ Reducer 26 ・ ・ ・ Slide jack 27 ・ ・ ・ Guide pipe 28 ・ ・ ・ Seal

Claims (7)

[Claims] 1. A mud feed pipe and a mud drain pipe are connected to a chamber provided behind the cutter head, muddy water is sent through the mud feed pipe into the chamber, and the cut soil and mud in the chamber are sent through the mud pipe. In a muddy shield machine that pumps to the ground and excavates the ground, a gravel crushing device consisting of a screw conveyor that accumulates gravel and a cone crusher that crushes gravel is detachably attached to the position of the mud drain pipe, and the gravel crushing device is installed. A muddy water shield machine with a built-in pebble crushing device, comprising a slide jack for moving forward and backward. 2. An agitator for agitating muddy water in the chamber is provided in the chamber.
A muddy water shield machine with a built-in rubble crusher as described in. 3. The muddy water shield machine according to claim 2, wherein the length of the agitator blade is variable. 4. The gravel crushing device according to claim 1, wherein an opening / closing valve is provided in each of the drainage pipes on the upstream side and the downstream side of the cone crusher of the gravel crushing device, and the gravel crushing device can be removed at the position of the valve. Muddy water shield machine with built-in gravel crusher. 5. A mud pipe and a mud pipe are connected to a chamber provided at the rear of the cutter head, mud is sent through the mud pipe into the chamber, and the cut soil and mud in the chamber are sent through the mud pipe. In the muddy water shield method of pumping the ground to the ground and excavating the ground, a gravel crushing device consisting of a screw conveyor for collecting gravel and a cone crusher for crushing gravel is detachably attached to the position of the mud pipe, and the gravel crushing device is slid. During normal earth excavation where gravel does not come out, the screw jack is contracted to retract the screw conveyor and cone crusher, and the cutting soil and muddy water are directly pumped to the ground via a drain pipe, and the gravel is pumped. When the soil excavation proceeds, the slide jack is extended to advance the screw conveyor and the cone crusher to remove the cut soil, muddy water and gravel soil. A muddy water shield method that collects on a screw conveyor, crushes gravels with a corn crusher, and pumps the cut soil and muddy water and the crushed gravelly soil to the ground via a drain pipe. 6. The muddy water shield method according to claim 5, wherein an agitator is provided in the chamber, and the muddy water in the chamber is stirred by the agitator. 7. The muddy water shield method according to claim 6, wherein the length of the agitator blade is variable.