JP2000064768A - Shield excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield excavator capable of easily carrying out attitude control by reducing the influence on meandering or the like during driving. SOLUTION: A face plate F of a shield excavator 1 is set to multiple face plates f1 to f4 divided into concentric circles, and chambers t1 to t4 independent for each of face plates f1 to f4 are provided. Also, the multiple face plates f1 to f4 are rotated in such a manner that neighboring face plates are reversely rotated respectively.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a shield excavator having an ultra-large cross section.

[0002]

2. Description of the Related Art In a shield excavator, a face plate having a cutter head facing a cutting face is rotated in a circle to cut the ground on the face of the cutting face.
It is housed in a room) and carried out of the mine by a conveyor. When the face plate rotates in a circle, the shield excavator meanders due to the speed difference between the inner and outer circumferences of the face plate and the rotating torque.
Difficult adjustment work such as posture control using a propulsion jack was performed.

The maximum diameter of a conventional shield excavator is 14.1
We have a track record of 4m large section shield excavator. As the construction scale increases, assuming a super-large cross-section shield excavator with a diameter of 20 m or more, the attitude control of the shield excavator becomes more difficult due to the speed difference between the inner and outer circumferences of the face plate and the rotational torque. Conceivable.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides a shield excavator in which the influence on the meandering during excavation is reduced and the attitude control is facilitated. The purpose is to

[0005]

[Means for Solving the Problem] A shield excavator, characterized in that the face slab of the shield excavator is a multiple face slab divided into concentric circles, and an independent chamber is provided for each face slab, The multiple face slab is a shield excavator characterized in that adjacent face slabs rotate in opposite directions.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<A> Overall Configuration FIG. 1 is a perspective view showing a main structure of a shield excavator 1 according to the present invention. The main structure of the shield excavator 1 includes a face plate F, a chamber T, and a partition W. Other devices and equipment are the same as the conventional shield excavator.

<B> Faceplate Faceplate F is composed of multiple faceplates f1 to f4 divided into concentric circles. The number of divisions of the face plate F is set according to the scale of the shield excavator 1. Each face plate f1 to f4 is
Adjacent face plates F are configured to rotate in opposite directions, respectively, and the rotational torque associated with the rotation of the face plates F is offset. A cutter bit 2 is attached to the face plate F as in the conventional shield excavator.

<C> Chamber Behind the surface plate F, a chamber T is installed. The chambers T are independent chambers t1 to t4 corresponding to the surface plates f1 to f4. The chamber T has a partition wall W, like the conventional shield excavator.
The closed space is constituted by.

<D> Other devices / equipment Each of the chambers t1 to t4 is provided with a separate conveyor so that the excavated soil in the chamber is carried out to the outside of the mine. (Not shown) Moreover, a mud line for sending and discharging is attached to each of the chambers t1 to t4. In this case, in order to prevent the circulation of muddy water at the cutter head, a flow rate control meter for the mud sending / discharging line may be installed. (Not shown)

[0011]

The operation of the shield excavator according to the present invention will be described below.

<A> Face mask drive The face mask F of the shield excavator 1 is driven. The face plate F is composed of multiple face plates f1 to f4 divided into concentric circles. Since the adjacent surface slabs are configured to rotate in opposite directions, the rotational torque associated with the rotation of the surface slab F is offset. Therefore, the difficulty of the posture control of the shield excavator 1 due to the speed difference and the rotation torque on the inner and outer circumferences of the face slab, which has been a conventional problem, can be solved, and the excavation accuracy can be improved.

<B> Accommodating and unloading excavated earth and sand As the surface slab F rotates, the ground on the face of the face is cut by the cutter bit 2
And the earth and sand cut by each chamber are t1-t
It is distributed and accommodated in 4 and is carried out of the mine by each conveyor etc. Since the shield excavator 1 according to the present invention is a super-large-section shield excavator, the amount and weight of earth and sand to be cut are large. Therefore, since the earth and sand are distributed and stored in each of the chambers t1 to t4, the weight is reduced, and the load on the surface slab F and the chamber T is reduced,
Efficient operation can be performed.

[0014]

Since the present invention is as described above,
The following effects can be obtained. <B> Since the face plate is divided into concentric circles and has a structure in which adjacent face plates rotate in opposite directions, the speed difference and rotation torque at the inner and outer peripheries of the face plate are offset, and the shield excavator meanders. It is possible to solve the difficulty of posture control due to the above, and to improve the excavation accuracy. <B> Since the chambers are installed corresponding to the respective surface plates, the load on the surface plates and the chambers is reduced, and efficient operation can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main structure of a shield excavator according to the present invention.

Claims (2)

[Claims] 1. A shield excavator, wherein the face slab of the shield excavator is a multiple face slab divided into concentric circles, and an independent chamber is provided for each face slab. 2. The shield excavator according to claim 1, wherein in the multiple face slabs, adjacent face slabs rotate in opposite directions, respectively.