JPS6051297A - Earth discharge apparatus of shield drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an earth removal device for a shield excavator.

Conventionally, earth removal devices in muddy water shield excavators have been equipped with jaw-flusher-type crushing devices that crush large solid objects such as coarse gravel and cobblestones that cannot be transported by fluid. By the way, in this crushing device, the movable teeth move toward and away from the fixed teeth, and the movable teeth are operated by a hydraulic cylinder. The operating cycle of this reservoir and crushing reservoir is determined by the number of times the hydraulic switching valve is switched, and is limited to approximately 50 times/minute, for example.Also, in hydraulic piping, the direction of oil flow changes each time, so there is a limit to the operating cycle. Therefore, it is an object of the present invention to provide an earth removal device for a shield excavator that can eliminate the above-mentioned drawbacks.

That is, the present invention provides a hopper having an opening for taking in dirt at the upper part and a fluid transport pipe connected to the lower part in the pressure chamber provided in the front part of the shield main body, and fixed teeth are arranged in the hopper. , a movable tooth is swingably supported via a horizontal axis at a position corresponding to the fixed tooth, an eccentric shaft is rotatably provided at an appropriate position of the movable tooth, and the eccentric shaft is rotated to move the movable tooth. A masonry device for a shield excavator, characterized in that it is equipped with a rotary drive device that moves toward and away from fixed teeth,
According to this configuration, the movable tooth is moved toward and away from the fixed tooth by the rotary drive device via the eccentric shaft, so the number of crushing times can be increased compared to, for example, a conventional reciprocating hydraulic cylinder. Therefore, the crushing efficiency is improved, and the movement of the movable teeth is reduced, so dynamic crushing can be performed, and the crushing load is therefore reduced.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4. (1) is the shield body of the muddy water type shield excavator (2), and in the front part thereof, a cutter head (4) with a single power chamber (3) formed inside rotates via a bearing (5). It is set freely. Note that (0) is a rotational drive device (for example, a hydraulic motor) that rotates the upper cutter head (4).
A pinion (7) housed in the output shaft is meshed with a ring gear (8) housed in the rear cylinder body (4a) of the cutter head (4). (9) is the earth removal device according to the present invention, which removes the earth and sand in the pressure chamber (3) as it is or, if the earth and sand contains large solid objects such as coarse gravel and boulders, crushes them and drains the earth and sand into the mud removal pipe. (Fluid transport pipe) This is for discharging to uQ. That is, Qυ is a hopper provided in the pressure chamber (3), which is formed by the cylindrical body 03 supported by the partition wall on the shield body (1) side, the front wall 114), and the rear wall 00. There is. An opening 01 for taking in sediment is formed in the upper part of the hopper αυ, and a mud removal pipe 01 for transporting sediment is connected to the rear wall (the upper and lower parts of the IQ). This opening/closing gate is used to close the opening αQ during maintenance, and is operated by a hydraulic cylinder (to) attached to the cylindrical body u3. (ILJ is located in the front half of the hopper 0υ and at a position corresponding to the opening AQ. It is a Grizzly-type screen that guides large solids to the rear half of the hopper α shell. Centering on the axis, there is a fixed tooth ?υ provided on the blade side, and a fixed tooth υ provided on the power side.
It is composed of four movable teeth that can move toward and away from each other. That is, the upper end of the fixed tooth eυ is attached to one inner wall of the cylindrical body so as to be able to swing in a plane orthogonal to the axis of the shield body (1) via several support links. The lower end portion thereof is supported on the hopper Uυ side via an eccentric shaft (c) for adjusting the position in the longitudinal direction. Also, the upper end t of the movable tooth (2), the fixed tooth G? , D is supported on the other inner wall of the cylindrical body 03 via a plurality of support links (A) in the same way as the fixed teeth υ, and at its lower end, there is an eccentric shaft for swinging ( 1) is rotatably inserted, and the output shaft (2) of a rotary drive device (for example, a front pressure motor) housed in the rear wall is inserted into this swinging eccentric shaft (E).
7a) are connected. Therefore, when the rotary drive device (A) operates, the movable tooth e4 moves toward and away from the fixed tooth υ, as shown by the arrow in FIG.
By rotating the lever (c) attached to the end of the rli 4-core shaft for adjusting the position of υ, the fixed tooth Qυ can be moved to the movable tooth (a) side, and the fixed tooth ? The gap between ◇ and the movable tooth @ can be adjusted. Incidentally, an uneven portion for crushing is formed on each opposing surface of the fixed teeth υ and the movable teeth. In addition, one end of each of the support links is supported by the inner surface of the cylindrical body Q side via the first horizontal connecting pin 4. It is connected to the fixed tooth CAD and the movable tooth (E) via a second horizontal connecting pin 1311.13
2 is a mud feeding pipe connected to the upper part of the rear wall Oe, and 13 (branch) is a jet water injection pipe inserted through the rear wall 0υ and the side of the hopper 0υ.

In the above configuration, the pressure chamber (3) of the cutter head (4)
The sediment taken in suddenly becomes a slurry and closes the opening u0 by 1.
The large solids (a) such as coarse gravel and cobbles contained in the earth and sand are removed by the screen (10).The earth and sand from which the large solids fat have been removed are sent to the hopper αυ. It reaches the inner bottom 9 and is transported to a predetermined place through the sludge removal pipe QQ.Meanwhile, it enters between the large solids removed by Nuclean 4 (aJ is the fixed tooth C21) and the movable tooth (2). Here, it is finely crushed by the movable teeth (4) that move toward and away from the fixed teeth eυ, that is, swing, and then, like the earth and sand that has passed through the screen OI, it is transported to a predetermined location via the mud removal pipe 01. be done.

According to the above configuration, the movable tooth is moved toward and away from the fixed tooth by the rotary drive device via the eccentric shaft, so the number of crushing times can be increased compared to, for example, a conventional reciprocating hydraulic cylinder. Therefore, the crushing efficiency becomes good, and the faster the movable teeth move, the more dynamic crushing becomes possible, and the crushing load becomes smaller.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall vertical sectional view, FIG. 2 is a view taken along arrow 1-1 in FIG. 1, and FIG.
A partially cutaway view from the arrow 11-l in the figure, Figure 4 is from ■-■ in Figure 3.
FIG. (1)...V-rud body, (2)...Seal tonneau or unitary machine, (3)...Pressure chamber, (4)...Cutter head, (9)...Earth removal device , (IG...sludge removal pipe, q]
)・・・Hopper, αη・−・Opening/closing gate, lJ! 1...
・Screen, 4...Crushing device, ■υ...Fixed teeth,
Sharp: Movable tooth, @: Support link, (c): 6 axes of IJi* for position adjustment, (7): Support link, (
1)...Eccentric shaft for swinging, (a)...Rotary drive device agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A hopper having an opening for taking in sediment at the top and a fluid transport pipe connected to the bottom is provided in the pressure chamber provided at the front of the shield main body, and fixed teeth are arranged in the hopper,
A movable tooth is supported so as to be able to swing around a horizontal axis at a position corresponding to the fixed tooth, and an eccentric shaft is rotatably provided at an appropriate position of the movable tooth, and the eccentric shaft is rotated to move the movable tooth as described above. An earth removal device for a shield excavator, characterized in that it is provided with a rotary drive device that moves toward and away from fixed teeth.