JPS5843558B2 - Shield excavator cobble crushing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cobblestone crushing device for a shield excavator that increases the diameter of cobblestones that can be taken in and can be applied to excavating a wider range of soil types.

Conventionally, the cobblestone crushing device of a shield excavator has either limited the diameter of the boulders that can be taken in due to the capacity of the earth and sand intake mechanism, or installed special equipment for the sole purpose of crushing the cobblestones, etc. to limit the diameter of the cobblestones that can be taken in. Since the structure is configured to increase the amount of soil, the structure of the soil intake section becomes complicated and large, which may cause problems in the 1-ba soil intake section, which has a negative effect on the intake of soil other than cobblestones. As a result, reliability and
There were major drawbacks in terms of economy and abbreviation.

The present invention aims to increase the diameter of boulders that can be taken into the shield excavator by simply introducing a structurally simple cobblestone crushing mechanism into the earth and sand intake section of the shield excavator, and to expand the soil types to which excavation can be applied. The purpose of the present invention is to provide a boulder crushing device for an excavator, the gist of which is to provide a shield excavator having a cutter spoke at the tip of a shield tube, with a plurality of crushing blades protruding from the inside of the cutter spoke. On the other hand, a bulkhead having a plurality of crushing blades protruding from the cutter spoke side is provided on the cross section of the shield tube in parallel with the cutter spoke.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view of a shield excavator incorporating a boulder crushing mechanism showing an embodiment of the present invention, in which 1 is a shield jack, 2 is a shield tube, 3 is a cutter spoke, 4 is a bulkhead, 5a and 5b are crushing blades provided on cutter spokes and bulkheads, 6 is a cutter power mechanism, 7 is an earth and sand intake mechanism, 8 is a belt conveyor, and 9 is a cutter shaft.

When the shield cylinder 2 is propelled by the shield jack 1, the boulders S of a certain size or more taken in between the cutter spoke 3 and the bulkhead 4 are crushed by a crushing blade provided on the rear side of the cutter spoke 3. 5a and a crushing blade 5b provided on the front side of the bulkhead 4.

When the cutter spoke 3 interlocking with the cutter shaft 9 rotates due to the operation of the cutter power mechanism 6, the cobblestone S receives a reaction force from the bulkhead 4 and is crushed. During this time, the cobblestone S crushed to a certain size or less is It falls into the earth and sand intake mechanism 7 and is taken in.

The boulders S taken into the earth and sand intake mechanism 7 and crushed to a size smaller than a certain size are conveyed to the shaft by a belt conveyor 8 along with other earth and sand.

In addition, even if the boulders S are guided to the earth and sand intake mechanism 7, if the cobblestone diameter does not reach a predetermined size or less and cannot be taken in, the above-mentioned crushing process is repeated again, and the earth and sand intake mechanism 7
The cobblestones S that can be taken in are taken in and transported to the shaft by the belt conveyor 8.

In order to improve the crushing process of the boulders S in the above-mentioned crushing process, as shown in FIG. In addition, it is effective to make the cross-sectional shape of the cutter spoke 3 wedge-shaped or the like, or to change the shape and arrangement of the crushing blades 5a and 5b attached to the cutter spoke 3 and the bulkhead 4 as appropriate.

In order to prevent the boulders S taken into the shield cylinder 2 through the cutter spokes 3 from staying in one part during the crushing process and to promote their movement, a scraping rod 11 is placed on the cutter spokes 3 and the cutter shaft 9. Furthermore, in order to guide boulders S of a certain size or less to the earth and sand intake mechanism 7, a grid 12 or the like may be provided at the earth and sand intake section.

It is expected that an overload will be applied to the cutter power mechanism 6 during the process of crushing the boulders S, but in this case, it is effective to provide a function to automatically reverse the direction of rotation of the cutter.

As explained above, according to the cobblestone crushing device of the present invention,
Even if there is a limit to the diameter of the boulders that can be taken in by the earth and sand intake mechanism 7, the diameter of the boulders that can be taken in by the shield excavator itself increases, the range of soil to which excavation can be applied is expanded, and the structure of the crushing device becomes more formal. This reduces mechanical troubles and improves reliability.

In addition, the manual work of taking in the cobblestones is reduced, and it is of great use for simplification.

Therefore, the overall speed of tunnel construction is improved, and there are great advantages in terms of time and economy for tunnel construction.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is a side sectional view thereof, FIG. 2A is a front view of a bulkhead with unevenness, and FIG. 2B is a second FIG. 3A is a sectional view taken along line BB in FIG. 1, FIG. 3B is a sectional view taken along line AA in FIG. 1, and FIG. 3B shows another embodiment. In the drawings, 2 is a shield cylinder, 3 is a cutter spoke, 4 is a bulkhead, 5a and 5b are crushing blades, 10 is an unevenness of the bulkhead, 11 is a raising bar, and 12 is a grid.

Claims (1)

[Claims] 1. In a shield excavator having a cutter spoke at the tip of a shield cylinder, a bulkhead having a plurality of crushing blades protruding from the inside of the cutter spoke and a plurality of crushing blades protruding from the cutter spoke side. A boulder crushing device for a shield excavator, characterized in that: is provided in a cross section of the shield tube in parallel with the cutter spoke.