JP2007092375A - Soil moving device of shield machine with small caliber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil moving device of a shield machine with a small caliber capable of installing a crusher inside of a shield machine having a narrow internal space. <P>SOLUTION: The soil moving device of the shield machine is equipped with a cylindrical shaped shield machine body 11, a rotational cutter 12 installed in the front end of the shield machine body 11 in a rotatable manner and a screw conveyor 20 slantly placed so as to take excavated earth and sand into the shield machine body 11, and the rotary crusher type crusher 30 is placed right under an exhaust port 21 of the screw conveyor 20 so that a conveying means 40 can be connected to the crusher 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a soil removal device for a small-diameter shield machine.

A small-diameter shield machine used for construction of a small-diameter shield tunnel takes in excavated earth and sand excavated by a rotary cutter into the machine through a screw conveyor, as in a normal machine. Then, the excavated earth and sand discharged from the screw conveyor into the mine is moved rearward by a belt conveyor or the like, and is carried out of the mine using a grinding steel wheel or a pressure pump.

The conventional shield machine earth removal technology has the following problems.
(1) With a large-diameter shield machine, the gravel layer can be excavated because it is possible to secure enough space to install the jaw crusher and cone crusher inside the shield machine.
On the other hand, in the case of a small-diameter shield machine, the internal space of the shield machine is narrow.
For this reason, in a small-diameter shield machine, it is only possible to install a belt conveyor or a pressure pump at the discharge port of the screw conveyor. Due to space limitations and interference with peripheral devices such as the erector device, there is a jaw in the shield machine. A crusher or cone crusher cannot be provided, and the discharge system of a large-diameter shield machine cannot be directly applied to a small-diameter shield machine.
(2) For the reason described above, when large-diameter gravel is present, it is considered difficult to construct a small-diameter shield tunnel because soil cannot be discharged unless the gravel is crushed.

This invention is made | formed in view of the above point, The place made into the objective is to provide the earth removal apparatus of any one of the following small-diameter shield machines.
(1) It should be possible to install a crusher inside a small-diameter shield machine with a narrow internal space.
(2) To enable construction of a small-diameter shield tunnel even in geology where large-diameter gravel exists.

The first invention of the present application is a shield machine main body formed in a cylindrical shape, a rotating cutter rotatably installed at the tip of the shield machine main body, and an inclination so as to take excavated earth and sand into the shield machine main body A small-diameter shield machine that transports excavated earth and sand taken into the shield machine body into the mine, and is large enough to transport gravel directly below the screw conveyor outlet. A soil removal device for a small-diameter shield machine, wherein a crusher for crushing is disposed.
A second invention of the present application is a shield machine main body formed in a cylindrical shape, a rotary cutter rotatably installed at the tip of the shield machine main body, and an inclination so as to take excavated earth and sand into the shield machine main body This is a small-diameter shield machine earth removal device equipped with a screw conveyor and an unloading means that conveys excavated earth and sand taken into the shield machine body, and can transport gravel directly under the outlet of the screw conveyor A soil removal device for a small-diameter shield machine, in which a crusher for crushing to a large size is arranged, and an unloading means is connected to the crusher.
A third invention of the present application is the earth removing device for a small-diameter shield machine according to the second invention, wherein a carry-out means is connected directly below the crusher.
A fourth invention of the present application is the earth removing device for a small-diameter shield machine according to the second invention, wherein a carry-out means is connected to a side (side) of the crusher.
A fifth invention of the present application is characterized in that, in any one of the first to fourth inventions, a drive motor for the screw conveyor is disposed on a side of the screw conveyor, and a discharge port is formed at an upper end portion of the screw conveyor. This is a small-diameter shield machine earth removal device.
A sixth invention of the present application is the earth removal device for a small-diameter shield machine according to any one of the second to fifth inventions, wherein the crusher is configured to be detachable from the screw conveyor and the carry-out means. is there.
A seventh invention of the present application is the earth removal device for a small-diameter shield machine according to any one of the first to sixth inventions, wherein the crusher is constituted by a rotary crusher.
An eighth invention of the present application is the earth removing device for a small-diameter shield machine according to any one of the second to sixth inventions, wherein the carry-out means is constituted by a rotary displacement type rotary pump.

The present invention has one of the following effects.
(1) The discharge port of the screw conveyor is formed at a high position of the machine, and the crusher can be installed immediately below the discharge port of the screw conveyor even when the internal space of the shield machine is narrow.
(2) Since a crusher is arranged inside the small-diameter shield machine and can be crushed to a size that can be transported, construction of a small-diameter shield tunnel is possible even in geology where large-diameter gravel exists.
(3) By constituting the crusher with a rotary crusher, the dimension in the height direction of the crusher can be reduced while ensuring sufficient crushing efficiency.
(4) When the carry-out means is arranged right next to the crusher, it is possible to cope with the case where the small-diameter shield machine has a smaller diameter and the crusher and the carry-out means cannot be arranged in tandem.
(5) When the crusher is configured to be detachable, the crusher can be attached and removed depending on the presence or absence of gravel, so that efficient excavation and soiling can be realized according to the geological situation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(1) Presupposed shield machine FIGS. 1 and 2 show model diagrams of a small-diameter shield machine 10 (hereinafter referred to as “shield machine 10”) assumed in the present invention.

The shield machine 10 can be applied to a muddy water type, earth pressure type, or various known types of shield machines.
The shield machine 10 also includes a multiple structure in which a plurality of divided bodies are connected in the axial direction so as to be suitable for curved construction.

  This shield machine 10 is equipped with a rotary cutter 12 on the face side of a cylindrical shield machine body 11, and in addition, an element device for assembling a segment 13 (not shown), a shield jack for excavation, etc., as necessary. .

The present invention is based on such a shield machine 10 and includes a soil removal device described in detail below.

(2) Earth Removal Device The earth removal device is composed of the screw conveyor 20, the crusher 30 disposed immediately below the discharge port 21 of the screw conveyor 20, and the unloading means 40 disposed directly below the discharge port 32 of the crusher 30. Composed.

[Screw conveyor]
The screw conveyor 20 is inclined and arranged between the face side chamber and the shield machine main body 11, and includes a casing 22, a screw 23 rotatably accommodated in the casing 22, and a drive motor 24 that rotationally drives the screw 23. .
The lower end of the casing 22 (left side of the drawing) is exposed on the face side so that the excavated earth and sand can be taken in. A discharge port 21 is formed below the upper end portion (right side of the drawing) of the casing 22.
The discharge port 21 of the casing 22 is configured to be able to control opening and closing by a gate (not shown).

The drive motor 24 is an electric or hydraulic motor, and is arranged on the side of the casing 22 so that the rotation of the drive motor 24 can be transmitted to the shaft or blade of the screw 23 via a known gear mechanism.
The reason why the drive motor 24 is arranged on the side of the casing 22 is to provide the discharge port 21 at the tail end of the casing 22 to ensure a wide space below the discharge port 21.

  Although FIG. 1 shows a case where the upper end of the screw conveyor 20 is bent horizontally, it may remain linear without being bent.

[Crushing machine]
The crusher 30 is a device for crushing large-diameter gravel when large-diameter gravel is mixed in the excavated earth and sand taken in by the screw conveyor 20, and a compact rotary crusher is optimal.

As a rotary crusher, for example, a rotary rotor that rotates around a horizontal axis and has a plurality of bits on the outer periphery thereof, and a fixed bit that is arranged to face the rotary rotor in a sealed structure housing 31 fall. A single-shaft rotary crusher that crushes incoming gravel between a rotating rotor and a fixed bit can be used.
In addition, the code | symbol 33 shown in FIG. 1 is a motor for rotationally driving a rotary rotor.

As another rotary crusher, a multi-shaft rotary crusher or a known rotary crusher that horizontally arranges a pair of rotating rotors and crushes gravel falling between the pair of rotating rotors can be adopted.
An upper port of the housing 31 is fixed integrally with the discharge port 21 of the screw conveyor 20, and a discharge port 32 is formed below the housing 31.

  Various crushers 30 are known, but by using a rotary crusher for the crusher 30, there is an advantage that the size in the height direction of the crusher 30 can be reduced while ensuring sufficient crushing efficiency.

[Unloading means]
The unloading means 40 is an apparatus for unloading the excavated earth and sand falling from the discharge port 32 of the crusher 30 to the outside of the shield machine 10.
In this example, a rotary displacement type rotary pump is adopted as the carry-out means 40.
The rotary pump is composed of a pump body 41 and a drive motor 42 for the pump body 41.
The pump body 41 is provided with earth and sand inlets and outlets, the outlet 32 of the crusher 30 is connected to the inlet, and one end of the pipe 50 is connected to the outlet. The excavated earth and sand containing crushed gravel can be transported into the mine.

(3) Excavation Sediment Discharge Method In the shield machine 10 configured as described above, the rotary cutter 12 is driven to rotate so that the sediment containing large-diameter gravel is placed in a chamber provided on the back side of the rotary cutter 12. It is captured.

  A part of the taken excavated earth and sand is transferred to a high place in the shield machine main body 11 through the screw conveyor 20 and is put into a rotary crusher which is a crusher 30 from the discharge port 21 of the screw conveyor 20.

When the large-diameter gravel is mixed in the excavated earth and sand thrown into the crusher 30, the large-diameter gravel is crushed to a size that can be conveyed by the crusher 30.
The excavated earth and sand containing the crushed gravel is put into a rotary pump constituting the carry-out means 40 through the discharge port 32 of the crusher 30 and transported into the mine through a pipe 50 connected to the carry-out means 40.

According to the earth discharging device configured as described above, the discharge motor 21 can be formed at a high position of the machine by disposing the drive motor 24 on the side of the screw conveyor 20 and the crusher 30 can be rotated by the rotary crusher. Thus, even if the internal space of the small-diameter shield machine is narrow, the crusher 30 and the unloading means 40 can be installed directly below the discharge port 21 of the screw conveyor 20.
Therefore, since the crusher 30 can be equipped in the shield machine 10 with a small diameter, even if a large-diameter gravel exists on the ground to be excavated, the crusher 30 can be crushed to a small size inside the shield machine 10 and conveyed. Therefore, construction of a small-diameter shield tunnel for the ground where large-diameter gravel exists can be realized.

(4) Other Embodiments In the above, the case where the crusher 30 and the carry-out means 40 are arranged one by one with respect to one screw conveyor 20 has been described. A plurality of crushers 30 and carry-out means 40 may be provided.
What is necessary is just to use properly the installation number of the crusher 30 and the carrying-out means 40 with the processing capacity of excavation earth and sand.

Moreover, although the above demonstrated the case where the screw conveyor 20, the crusher 30, and the carrying-out means 40 were arranged in series, the carrying-out means 40 may be arrange | positioned beside the crushing machine 30. FIG.
This is effective when the diameter of the shield machine 10 is smaller and the crusher 30 and the carry-out means 40 cannot be arranged in tandem.

The crusher 30 may be configured to be detachable.
For geology where there is no large-diameter gravel, the crusher 30 is removed and the unloading means 40 is connected directly below the screw conveyor 20.
As a connection form of the unloading means 40, the unloading means 40 is lifted and directly connected to the discharge port 21 of the screw conveyor 20, or the unloading means 40 is left as it is, and the discharge port 21 of the screw conveyor 20 and the unloading means are connected. There is a form in which a separate connecting cylinder is interposed between the 40.
If comprised like this example, since the crusher 30 can be attached and detached according to the presence or absence of gravel, it can dig and can implement | achieve efficient excavation soil according to the condition of geology.

In the present invention, the crusher 30 may be connected just below the discharge port 21 of the screw conveyor 20 and the installation of the unloading means 40 may be omitted.
In this example, the excavated earth and sand discharged from the crusher 30 is moved rearward by a pressure pump, a scrap steel wheel, a belt conveyor, or the like.

Model diagram of earthing device for shield machine according to the present invention Sectional view of II-II in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Shield machine 20 ... Screw conveyor 21 ... Discharge port 22 ... Casing 23 ... Screw 30 ... Crusher (rotary crusher)
40 ... Unloading means

Claims (8)

A shield machine main body formed in a cylindrical shape, a rotary cutter rotatably installed at the tip of the shield machine main body, and a screw conveyor arranged to be inclined so as to take excavated earth and sand into the shield machine main body, A small-diameter shield machine earth removal device that transports excavated earth and sand taken into the shield machine body into the mine,
A crusher that crushes gravel into a size that can be transported is located directly under the outlet of the screw conveyor,
Earth removal device for small-diameter shield machines. A shield machine main body formed in a cylindrical shape, a rotary cutter rotatably installed at the tip of the shield machine main body, a screw conveyor arranged to be inclined so as to take excavated earth and sand into the shield machine main body, and a shield machine A small-diameter shield machine earth removal device comprising unloading means for conveying excavated earth and sand taken into the main body into the mine,
A crusher that crushes gravel into a size that can be transported is placed directly under the outlet of the screw conveyor.
The unloading means is connected to the crusher,
Earth removal device for small-diameter shield machines. In claim 2, characterized in that unloading means is connected directly below the crusher,
Earth removal device for small-diameter shield machines.   3. The earth removing device for a small-diameter shield machine according to claim 2, wherein an unloading means is connected to the side of the crusher.   5. The small-diameter shield machine according to claim 1, wherein a drive motor for the screw conveyor is disposed on a side of the screw conveyor, and a discharge port is formed at an upper end portion of the screw conveyor. Soil removal equipment.   6. The earth removing device for a small-diameter shield machine according to claim 2, wherein the crusher is configured to be detachable from the screw conveyor and the carry-out means.   The earth removing device for a small-diameter shield machine according to any one of claims 1 to 6, wherein the crusher is constituted by a rotary crusher.   7. The earth removing device for a small-diameter shield machine according to claim 2, wherein the carry-out means is constituted by a rotary displacement type rotary pump.

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