JPS6058359B2 - Mud water pressurized shield excavator - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mud water pressurizing shield excavator.

As shown in FIGS. 1 and 2, a conventional mud water pressurizing type shield excavator has an intake port on the front surface of the shield body a, and a plurality of intake ports on one side edge. A cutter head d provided with a cutter bit c is rotatably provided, a pressure chamber g is formed by a drum portion e projecting backward from the cutter head d and a partition wall f, and muddy water is poured into the pressure chamber g. At the same time as connecting the supplying mud pipe, a mud removal pipe i is connected, and mud water is supplied to the pressure chamber g through the mud pipe and pressurized to oppose the face, thereby preventing the face from collapsing. However, the face surface is excavated by the cutter bit c by the rotation of the cutter head d, and the excavated earth and sand is discharged together with muddy water from the mud draining pipe i, even if the soil quality of the excavated layer is fine sand and silt layer. In this case, it is possible to sufficiently excavate with a mud water pressurized excavator equipped with a cutter head d equipped with a cutter bit c as described above, which is suitable for this purpose. If there is, the cutter bit c described above cannot crush gravel and cobblestones (hereinafter referred to as cobblestones, etc.), and therefore cannot be discharged through the mud removal pipe i, making construction impossible. It is what it is.

Therefore, it is conceivable to attach a rolling cutter (disk cutter) attached to the cutter head of the conventional shield excavation machine for rock excavation to the cutter head of the above-mentioned mud water pressurized shield excavation machine. As shown in Fig. 3, the rolling cutter attached to the cutter head of the shield tunneling machine has one rolling cutter 1, 1, etc. installed on the surface of the cutter head. Therefore, it is possible to achieve the intended purpose for rock excavation, but
For strata where cobblestones etc. are scattered during excavation, the 4th
As shown in the figure, even if the cutting edge of the rolling cutter 1 hits a boulder m, etc. to be crushed, it does not crush the boulder m, but only pushes it to the side as shown by the imaginary line. Even if the disc cutter for this purpose is applied as is to a mud water pressurized shield excavator, it will not crush boulders m, etc., and therefore, like the conventional mud water pressurize shield excavator, it will not crush boulders etc. that are larger than the diameter of the mud removal pipe. If there is such a problem, the excavated soil cannot be discharged from the mud drainage pipe, making construction impossible.

The present invention was devised in view of the above circumstances, and even if there is a stratum dotted with boulders etc. larger than the diameter of the sludge pipe,
The object of the present invention is to provide a mud water pressurizing type shield excavator that can crush boulders and the like and discharge excavated earth and sand through a mud removal pipe.

Embodiments of the present invention will be described below with reference to FIGS. 5 and 7.

In FIG. 5, reference numeral 1 denotes a shield body, and a base 2 is fixedly installed inside the shield body 1 on the front side.

A cutter head support 3 is fixed to the base 2. An inner ring side 51 of a bearing body 5 is fixed to the cutter head support 3 via a receiving member 4, and an outer ring side 52 of the bearing body 5 is fixed to the cutter head support 3. A drum portion 8 projecting rearward from the cutter head 7 is connected to the drum portion 8 via a connecting ring member 6, and rotatably supports the cutter head 7. Further, a gear 9 is provided on the outer ring side 52 of the bearing body 5, and the gear 9 meshes with a pinion 11 of a cutter head drive mechanism 10 held by the cutter head support 3. As shown in FIG. 6, the cutter head 7 is provided with a plurality of intake ports 12, 12..., and a large number of rolling cutter groups 13, 13... rotate radially. It can be installed freely.

The rolling cutter group 13 is made up of a plurality of rolling cutters 131, 132, 133, etc. attached to one shaft member in a superimposed manner. Note that each of the rolling cutters 131,
13. , 133 naturally protrude from the surface of the cutter head 7. A muddy water chamber 14 is provided in the center of the cutter head support 3, and the muddy water chamber 14 enters the intake chamber 16 formed by the drum section 8 through a chute 15 provided at the upper front side thereof. It's communicating. A blocking gate mechanism 17 is provided on the exit side of the chute 15, and the blocking gate mechanism 17 controls communication and isolation between the intake chamber 16 and the muddy water chamber 14. 18 and 19 are sludge feeding pipes and sludge drainage pipes,
The mud feeding pipe 18 is connected to a connecting pipe 20 that opens on the side of the chute 15, and the mud draining pipe 19 connects to the muddy water chamber 14.
The connecting pipe 21 is connected to the connecting pipe 21 which is open to the outside.

The mud water pressurized shield excavator constructed as described above operates as follows.

That is, by driving the cutter head drive mechanism 10, the cutter head 7 is rotated via the pinion 11, the gear 9, and the connecting ring member 6.

Due to the rotation of the cutter head 7, the rolling cutter groups 13, 1
3... also rotates on its own axis while contacting the face surface, and these rolling cutter group 13 has a plurality of rolling cutters 131, 132, 133 attached to one shaft member in a superimposed state. Therefore, when there is a boulder m etc. on the surface, one rolling cutter 131 of the rolling cutter group 13 comes into contact with the boulder m etc. and is pushed to the side as shown by the imaginary line. Even if the boulder m etc. is crushed by another rolling cutter 132 adjacent to it,
The crushing efficiency is extremely good, and in this way,
The waste including boulders etc. crushed by the rolling cutter group 13... is taken into the intake chamber 16 through the intake ports 12, 12..., thrown into the muddy water chamber 14 through the chute 15, and discharged. It is discharged to the outside through a mud pipe 19. Note that during normal work, the gate 171 of the closing gate mechanism 17 provided on the exit side of the chute 15 is moved back to open the chute 15. As described above, the present invention includes rotatably attaching the cutter head 7 having a plurality of intake ports 12 to the front surface of the shield body 1, and
An intake chamber 16 and a muddy water chamber 14 are provided at the rear of the intake port 12 to take in the sludge taken in from the intake port 12, and a mud feeding pipe 18 and a mud drainage pipe are connected to the intake chamber 16 and the muddy water chamber 14, respectively. 19
In the mud water pressurizing type shield excavator, the cutter head 7 has a plurality of rolling cutters 131 on one shaft member.
, 132, 133, . . . are mounted in a superimposed state.
132, 133... are rotatably mounted with their tips protruding from the surface of the cutter head 7 and arranged in a radial direction, so even if a boulder or the like larger than the diameter of the mud removal pipe 19 is encountered during excavation, The rolling cutter group 13 crushes the slurry into smaller pieces and discharges the slurry to the outside via the mud removal pipe 19.Moreover, the rolling cutter group 13 has a plurality of rolling mills on one shaft member. Cutter 131, 132, 1
33... are mounted in a superimposed state, so even if a boulder or the like is pushed and moved by one rolling cutter 131, the adjacent rolling cutter 132 mounted in a superimposed state Alternatively, the material can be crushed by the method 133, and the crushing efficiency can be improved and construction can be continued.

[Brief explanation of drawings]

Figures 1 and 2 are a partially cutaway side view and front view of an example of a conventional mud water pressurizing shield excavator, Figure 3 is a schematic front view of a conventional shield excavator for rock excavation, and Figure 4 is a front view of a conventional shield excavator for rock excavation. 5 and 6 are partially cutaway side views and front views showing an embodiment of the present invention, and FIG. 7 is a functional explanatory diagram thereof. 1 is the shield body, 7 is the cutter head, 12 is the intake port,
13 is a group of rolling cutters, 131, 132, 133 are rolling cutters, 14 is a slurry chamber, 16 is an intake chamber, 18 is a mud feeding pipe, 1
9 is the mud removal pipe.

Claims (1)

[Claims] 1 A cutter head 7 having a plurality of intake ports 12 is rotatably attached to the front surface of the shield body 1, and an intake port is installed at the rear of the cutter head 7 to take in scraps taken in from the intake ports 12. In a mud water pressurizing type shield excavator which is provided with a chamber 16 and a mud water chamber 14, and a mud feed pipe 18 and a mud discharge pipe 19 that communicate with the intake chamber 16 and the mud water chamber 14, respectively, the cutter head 7 has one A large number of the rolling cutter group 13, which is made up of a plurality of rolling cutters 13_1, 13_2, 13_3, etc. attached to a shaft member in a superimposed state, are arranged such that the tip of each of the rolling cutters 13_1, 13_2, 13_3,... A mud water pressurizing type shield excavator characterized in that the cutter head 7 is rotatably attached to the cutter head 7 so as to protrude from the surface thereof and to be arranged in a radial direction.