JPS6027360B2 - Gravel removal device for shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wood cutting device for a shield tunneling machine.

If the muddy water transported by the drainage line from the shield excavator contains clay lumps or stones, these clay lumps or stones will not only reduce the transport efficiency, but in the worst case, they will also be transported into the drainage line. It becomes clogged and becomes impossible to transport.

The present invention proposes a cutting device for a shield excavator that can easily cut viscous lumps, stones, etc., and remove them from the draining mud water line before they enter the 9E mud water line.
One embodiment will be described below based on FIGS. 1 to 3.

1 is a shield, 2 is a fixed cylindrical body concentric with the shield 1, and a cutter head 5, a rotary bucket 6 integrated therewith, etc. are supported via bearings 3 and 4.

These rotating members are interlocked and connected to a drive motor 7 via a gear mechanism 8. Inside the rotating member is a face pressure chamber 9.
A mud water supply line (not shown) is connected to this face pressurizing chamber 9.
) is passed through the connecting pipe 10. Reference numeral 11 denotes an excavated soil receiving hopper, and this hopper 11 has an inlet 12 that opens inside the face pressurizing chamber 9, and a body 13 that extends through the fixed cylinder 2 to the atmospheric pressure side 14. Ru.

A crossbeam 15 is constructed at the capital within the hopper 11. 16 is a rotor, and this rotor 16 includes a drive shaft 20 having a horizontal axis 19 attached to the neck of the hopper 11 via bearings 17 and 18, and this drive shaft 20' being spaced at appropriate intervals in the axial direction. It consists of attached crushing blades 21, and these crushing blades 21 are shifted by an arbitrary angle stepwise in the direction of rotation.

The two drive shafts are interlocked and connected to a hydraulic motor 22 with a reducer for driving. This enables forward rotation A and reverse rotation B, but when forward rotation A, pinching rotation is also possible. 23 is a cross beam. 15 and the front end wall 11A of the hopper 11, one side portion of the drive shaft 2-0 is provided as a bar screen 23A at the same level as the horizontal shaft center 19, and The other side portion is an inclined screen 23B.

A cam chamber 24 is formed at the rear end of the hopper 11 . A vibration node 25 is provided between the cross beam 15 and the cam chamber 24. That is, the vibration node 25 consists of a plurality of oblique bars 25A, one end of which is connected to the crossbeam 1 by the machine shaft 26.
5, and the other end follows the eccentric cam 27 inside the cam chamber 24. Eccentric cam 27 is kinematically coupled to a drive motor 28 located outside the hopper. Hopper 1
1 is divided into upper and lower parts by the vibrating bars 25, with the lower part serving as a shredded material receiving chamber 28 and the upper part serving as a non-shredded material receiving chamber 28. The cut material receiving chamber 28 faces the side where the crushing blades 21 descend through the bar disk IJ horn 23A when the motor 16 rotates forward A, and the non-pongee cut material receiving chamber 29 faces the end of the rear oblique screen 23B. Coming. In addition, non-pongee-cut items reception room 29
A non-pongee material outlet 30 is provided at the outlet 30, and an opening/closing lid 32 having an operating device 31 is provided for each outlet. The cut material receiving chamber 28 is provided with a muddy water outlet pipe 33 connected to a scale muddy water line (not shown). Note that 34 is a gate opening/closing device for the excavated earth and sand inlet 12. During normal operation, the rotor 16 rotates in the forward direction A at a constant speed, and the mud flowing through the mud water line enters the face pressure chamber 9 from the connecting pipe 10, mixes with excavated earth and sand, and then enters the hopper 11. is introduced from the inlet 12.

Then, pass through the bar screen 23A to the pongee cutting receiving room 28.
After entering the muddy water, the muddy water is discharged from the muddy water outlet pipe 33 to the muddy water line 8E. When clay lumps are included in the muddy water, the clay lumps are received by the bar screen 23A, but at this time, the crushing blades 18 rotating in the forward direction B are driven into the clay lumps, causing the pruning to be cut. (cut), and then passes between the fixed bars and moves to the shredded material receiving chamber 29. When the clay lump is hard and cannot be cut in one go, the rotational load on the rotor 16 increases, which is caught by the hydraulic circuit, and the rotor 16 is automatically rotated in an inching manner, thereby cutting the clay. . Cobblestones and rocks on bar screen 23A
If such a problem is detected, the pinching rotation is performed as described above, but when this pinching rotation is repeated several times, the rotor 16 performs the reverse rotation B. As a result, the boulders and edges C on the bar screen 23A are struck. The shredded material is specially raised by the shredder blade 21, and the non-shredded material receiving chamber 29 is raised from above the inclined screen 238.
sent to.

At this time, the boulders and rocks C fall onto the vibrating node 25, and while passing over this, the fine fleas pass through the vibrating node 25 and reach the pongee cutting material receiving chamber 28.

Note that the rotor 16 returns to normal rotation A again after reverse rotation by a certain angle. The cobblestones and machine C in the non-woven material receiving chamber 29 have an opening/closing lid 32.
By opening the holder, the material can be taken out through the extraction port 30 by manual pulling or extrusion using a piston or the like. As described above, according to the present invention, clay particles, stones, etc. contained in muddy water can be shredded before entering the muddy water line, and non-shredded items can be taken out. In addition to preventing a decline in transportation efficiency,
It can completely eliminate situations where clay lumps, stones, etc. become unstable and cannot be transported.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal side view;
Figure 2 is a view from the X-X arrow in Figure 1, and Figure 3 is a Y-X view in Figure 1.
It is a Y cross section arrow direction view. 9... Face pressure chamber, 11... Excavation earth and sand receiving hopper, 12... Excavation earth and sand inlet, 13...
・．．・Hopper chest, 14... Atmospheric pressure side, 15
...... Cross beam, 16... Rotor, 19...
... Horizontal axis center, 20 ... Drive shaft, 21 ...
... Crushing blade, 22 ... Hydraulic motor with drive reducer, 23 ... Screen, 23A ... Bar screen, 23B ... Inclined screen, 25 ...
・Vibration node, 25A... Inclined bar, 28...
Tsumugi-cut items reception room, 29...Non-tsumugi-cut items reception room, 30
......Non-pongee material outlet, 33...Muddy water outlet pipe. Figure 1 Figure 3 Figure 2

Claims (1)

[Claims] 1 A gravel removal device installed inside the excavated soil receiving hopper that opens in the face pressure chamber of the shield excavator, which can rotate forward and backward around the horizontal axis and is capable of striking at appropriate intervals in the horizontal axis direction. A rotor having crushing blades, a bar screen having a large number of fixed bars disposed on one side of the horizontal axis and allowing rotation of the crushing blades, and extending from below to behind the bar screen. a shredded material receiving chamber, a non-shredded material receiving chamber arranged in parallel above the shredded material receiving chamber on the other side of the horizontal axis, a shredded material receiving chamber and a non-shredded material receiving chamber. A gravel removal device for a shield excavator, comprising: a vibrating sieve installed between the bar screen, an excavated soil inlet formed above the bar screen, and an earth and mud water outlet formed in a shredded material receiving chamber. .