JP7175575B2 - shield machine - Google Patents

Description

The present invention relates to a shield machine.

Conventionally, in underground propulsion work, a shield tunneling machine is placed in a starting shaft, and a segment ring composed of a plurality of segments is sequentially connected while excavating the bedrock from the starting shaft to the arrival shaft with the shield tunneling machine. (See Patent Document 1, for example).

Japanese Patent Application Laid-Open No. 2003-214085

When starting a shield machine, hydraulic equipment such as a pump is often placed on the rear work deck of the shield machine to omit the trailing truck. cannot be installed, the rear working deck may be divided into two parts, a front part and a rear part, and the shield machine may be started with only the front part being installed.

However, if only the front part of the rear working deck is installed on the shield machine, the hydraulic equipment mounted on the rear part of the rear working deck will be on the ground when the shield machine starts. Therefore, it is necessary to route a hose connecting the shield machine and the hydraulic equipment on the ground, which is very troublesome and costly.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a shield machine capable of eliminating the need to route a hose when starting from a starting shaft.

A shield machine of the present invention comprises an excavator main body, a rear working deck provided in the machine main body and having a front deck section and a rear deck section that can be separated from the front deck section, and the excavator. a plurality of pumps for sending hydraulic oil to the apparatus of the main body; and a tank provided on the front deck portion of the rear work deck for storing the hydraulic oil, and the plurality of pumps are provided for initial excavation. and a plurality of second pumps necessary for main excavation, wherein the first pumps are provided on the front deck portion of the rear working deck.

According to the present invention, since the first pump necessary for the initial excavation of the excavator main body is arranged on the front deck portion of the rear working deck, it is not necessary to route from the ground a hose for supplying hydraulic oil to each device of the excavator main body. do not have. This eliminates the labor and cost associated with routing the hose. Moreover, even if the starting shaft is narrow, there is no problem that the narrow space is occupied by the hose. The second pump is the first pump and the other pumps necessary for main excavation.

In the above invention, the shield machine includes a shield jack for advancing the machine body, an erector device for grasping segments in the machine body to assemble segment rings, and a cutter provided at the tip of the machine body. a copy cutter device provided on the head and having a copy cutter provided so as to be able to expand and contract radially outward of the cutter head; The first pump includes a shield jack propelling pump that sends hydraulic oil to the shield jack, an erector device pump that sends hydraulic oil to the erector device, and a copy cutter device pump that sends hydraulic oil to the copy cutter device. and an agitator pump that delivers hydraulic fluid to the agitator.

According to the above configuration, the shield jack, the erector device, the copy cutter device and the agitator can be used during the initial excavation.

In the above invention, the shield machine further includes a shape retaining device that retains the shape of the segment ring assembled by the erector device, and the first pump is a shape retaining device for feeding hydraulic oil to the shape retaining device. and a circulation pump that circulates cooling water to a hydraulic motor that rotates the cutter head. An oil cooler that cools hydraulic oil in the tank is further provided on the front deck portion of the rear working deck. may be provided.

According to the above configuration, the shape retaining device, the circulation pump, and the oil cooler can be used during the initial excavation.

In the above invention, the first pump includes a shield jack assembling pump that sends hydraulic oil to the shield jack when shortening the shield jack when excavation and assembly of the segment ring by the erector device are performed in parallel. It's okay.

According to the above configuration, excavation and assembly of the segment ring can be performed in parallel during the initial excavation.

In the above invention, the front deck portion of the rear working deck has a first deck portion and a second deck portion arranged below the first deck portion, and the tank is arranged on the first deck portion. A maintenance space is formed on the side of the tank, and the first pump is preferably arranged on the second deck portion.

According to the above configuration, a pump or the like is not arranged in the maintenance space, which facilitates maintenance work.

In the above invention, the shield machine is a mud pressure type shield machine that excavates by applying mud pressure to the face face by adding a mud additive to the excavated earth and sand in the cutter chamber to turn the excavated earth and sand into mud, A long screw conveyor device for discharging excavated earth and sand from the excavator main body, and a screw gate device provided at a downstream end of the screw conveyor device, wherein the first pump is connected to the screw conveyor device. and a screw gate pump that delivers hydraulic fluid to the screw gate device.

According to the above configuration, the screw conveyor device and the screw gate device can be used during the initial excavation.

In the above invention, the second pump may be provided on the rear deck portion of the rear working deck.

According to the above configuration, after the initial excavation, that is, after the space in the starting shaft is secured, the rear deck section on which the remaining pumps necessary for the main excavation (excavation after the initial excavation) are mounted is placed on the front deck section. can be concatenated.

In the above invention, the second pump includes a shield jack main excavation pump that joins hydraulic oil sent to the shield jack by the shield jack propulsion pump and sends the hydraulic oil to the shield jack, and the screw conveyor pump. and a screw conveyor main excavation pump that joins the hydraulic oil sent to the screw conveyor device and sends the hydraulic oil to the screw conveyor device.

According to the above configuration, the shield jack and the screw conveyor device can be used during the main excavation after the initial excavation.

ADVANTAGE OF THE INVENTION According to this invention, the shield machine which can eliminate the routing of a hose at the time of starting from a starting shaft can be provided.

1 is a cross-sectional view showing a state of a shield machine during initial excavation according to an embodiment of the present invention; FIG. 1 is a cross-sectional view showing a state of a shield machine according to an embodiment of the present invention during main excavation; FIG. FIG. 4 is a diagram for explaining the arrangement of hydraulic equipment on the front deck and the rear deck of the rear work deck of the mud pressure type shield machine; FIG. 4 is a diagram for explaining the arrangement of hydraulic equipment on the front deck and the rear deck of the rear work deck of the slurry shield machine;

A shield machine according to an embodiment of the present invention will be described below with reference to the drawings. The shield machine described below is merely one embodiment of the present invention. Therefore, the present invention is not limited to the following embodiments, and additions, deletions, and modifications can be made without departing from the scope of the present invention.

FIG. 1 shows a shield machine 1 according to one embodiment of the present invention. FIG. 1 shows the state of the shield machine 1 at the time of initial excavation. In the following description, except for FIG. 4, which will be described later, the shield machine 1 of the present embodiment is a mud pressure type shield machine in which a mud additive is added to turn the excavated earth and sand into mud, and the face is subjected to mud pressure to excavate. will be explained as However, the present invention can also be applied to a slurry type shield machine that excavates by sending slurry into the cutter chamber and applying slurry pressure to the face. Further, although the shield machine 1 is of the cutter bit type in this embodiment, it may be of the roller cutter type.

As shown in FIG. 1, in the underground propulsion work, the shield machine 1 is placed in a starting shaft 200 at the time of initial excavation. Then, while excavating the natural ground by the shield machine 1, the segment rings 100 are sequentially connected up to an unillustrated arrival shaft.

The shield machine 1 of this embodiment is a folding type shield machine, and includes a cutter head 2 and a machine body 3 that rotatably supports the cutter head 2 . The excavator main body 3 is composed of a front body 4 and a rear body 5 . The front barrel 4 and the rear barrel 5 are connected by a bent portion 6 . A bulkhead 8 that forms a cutter chamber 13 together with the cutterhead 2 is provided at the front of the front barrel 4 . The cutter head 2 includes a cutter head flange that is an annular plate, and a cutter drum 7 is attached to the back surface of the cutter head flange. The cutter drum 7 is rotatably supported by the excavator body 3 .

The center-folded portion 6 can be center-folded by extending and contracting the center-folding jack 9 . For example, by making the amount of extension of the left side bending jack 9 larger than the extension amount of the right side bending jack 9 in plan view, the excavator body 3 can be bent rightward. The excavator main body 3 can be bent in the left direction.

The cutter head 2 is provided with a copy cutter device 40 having a copy cutter 41 which is extendably provided radially outside the cutter head 2 . For example, when the ground in front of the excavator main body 3 is hard, excavation by the copy cutter 41 is performed when the excavator main body 3 is turned.

An agitator 42 is provided in the cutter chamber 13 . This agitator 42 is provided on the front surface of the bulkhead 8 . The agitator 42 agitates the excavated soil within the cutter chamber 13 .

A plurality of shield jacks 11 are provided on the front portion of the rear trunk 5 of the excavator main body 3 . These shield jacks 11 receive a reaction force by extending the jack spreader toward the existing segment ring 100 . In such a configuration, by extending the jack spreader while rotating the cutter head 2, the excavator main body 3 can be advanced while excavating the ground.

A front end portion of an elongated screw conveyor device 20 for discharging earth and sand excavated by the cutter head 2 to the rear of the excavator body 3 is fixed to the lower portion of the bulkhead 8 . The screw conveyor device 20 is arranged at the center in the radial direction of the excavator main body 3 in plan view. Further, the screw conveyor device 20 extends obliquely upward to the right from the lower portion of the bulkhead 8 in a side view (plan view in FIG. 1).

A screw gate device 22 is provided at the downstream end of the screw conveyor device 20 . The opening of the screw conveyor device 20 is opened and closed by a screw gate device 22 .

A framework 15 provided on the rear trunk 5 of the excavator main body 3 is rotatably provided with an erector device 30 that assembles the segment at a predetermined position on the tunnel wall surface. More specifically, the erector device 30 includes a slewing ring 10 supported inside the rear fuselage 5 so as to be rotatable along the rear fuselage 5, and a slider attached to the slewing ring 10 for transporting the segment to a predetermined position on the tunnel wall surface. It has a moving portion 16 and a gripping portion 17 attached to the tip of the sliding portion 16 for gripping the segment.

A shape retaining device 43 is provided to press the segment from the inside in order to retain the shape of the segment.

Here, a rear working deck 50 is provided inside the rear barrel 5 and over its rear region. The front part of the rear working deck 50 is fixed to the framework 15 by welding. The rear working deck 50 is provided in a cantilevered state. The rear work deck 50 will be described in detail below.

The rear work deck 50 has a front deck section 56 and a rear deck section 57 (described later in FIG. 2) which is separable from the front deck section 56 . The front deck portion 56 is arranged in the starting shaft 200 at the time of initial excavation. On the other hand, since the rear deck portion 57 is connected to the front deck portion 56 during main excavation, it is not arranged in the starting shaft 200 during the initial excavation.

The front deck portion 56 has a first deck portion 53 and a second deck portion 51 arranged below the first deck portion 53 . A tank 54 that stores hydraulic oil is arranged in the front portion of the first deck portion 53, and another area on the first deck portion 53 (an area behind the tank 54 on the first deck portion 53) is formed with a maintenance space MS. On the other hand, on the second deck portion 51 of the front deck portion 56, a plurality of pumps and the like necessary for initial excavation are arranged. A detailed description will be given below.

FIG. 3 is a diagram for explaining the arrangement of hydraulic equipment on the front deck portion 56 and the rear deck portion 57. As shown in FIG. 3 shows a state in which the second deck portion 52 of the rear deck portion 57 is connected to the second deck portion 51 of the front deck portion 56, that is, the state of the rear working deck 50 during main excavation. At the time of initial excavation, the second deck portion 52 is not connected.

As shown in FIG. 3, the second deck portion 51 of the front deck portion 56 is formed in a substantially U shape in plan view to avoid the area 151 where the screw conveyor device 20 is arranged.

As described above, the second deck portion 51 is provided with a plurality of pumps and the like necessary for initial excavation. Specifically, the second deck portion 51 has two shield jack propelling pumps 70 that send hydraulic oil to the shield jacks 11, and a shield jack that is used when the excavator main body 3 is running at a low speed and sends hydraulic oil to the shield jacks 11. A low-speed pump 71, three agitator pumps 72 for sending hydraulic oil to the agitator 42, a shape-retaining device pump 73 for sending working oil to the shape-retaining device 43, and a screw conveyor for sending working oil to the screw conveyor device 20. A pump 74 and two erector device pumps 75 are provided that deliver hydraulic fluid to the erector device 30 .

Further, on the second deck portion 51, there are two pumps for pumping hydraulic oil to the shield jack 11 when the shield jack 11 is shortened when the excavation and the assembly of the segment ring 100 by the erector device 30 are performed in parallel. 76, two copy cutter device pumps 77 that supply working oil to the copy cutter device 40, a circulation pump 78 that circulates cooling water to the drive that rotationally drives the cutter head 2, and an oil cooler that cools the working oil. 79 and a screw gate pump 80 that delivers hydraulic fluid to the screw gate device 22 .

As described above, the tank 54 is arranged on the first deck portion 53 arranged in the starting shaft 200 at the time of initial excavation, and the second deck portion 51 arranged in the starting shaft 200 at the time of initial excavation has an initial A plurality of pumps required for excavation are installed.

When the initial excavation is completed, that is, when the space in the starting shaft 200 is secured, as shown in FIG. , and a secondary screw conveyor device 23 is connected to the downstream end of the screw conveyor device 20 .

The rear deck portion 57 has a first deck portion 55 and a second deck portion 52 arranged below the first deck portion 55 in the same manner as the front deck portion 56 . On the second deck portion 52 of the rear deck portion 57, a plurality of pumps other than at least the plurality of pumps required for the initial excavation among the plurality of pumps for supplying hydraulic oil to the device of the excavator main body 3 are provided. . A detailed description will be given below.

As shown in FIG. 3, the second deck portion 52 of the rear deck portion 57 is formed in a rectangular shape in plan view. The second deck portion 52 has two shield jack propelling pumps 70, four screw conveyor pumps 74, two shield jack assembly pumps 76, a circulation pump 78, an oil cooler 79, and a secondary screw. Three screw conveyor pumps 81 are provided to deliver hydraulic fluid to the conveyor system 23 .

A shield jack propelling pump 70 provided on the second deck portion 52 of the rear deck portion 57 is sent to the shield jack 11 by a shield jack propelling pump 70 provided on the second deck portion 51 of the front deck portion 56. Hydraulic oil is sent to the shield jack 11 by merging with the hydraulic oil. Further, the screw conveyor pump 74 provided on the second deck portion 52 of the rear deck portion 57 feeds to the screw conveyor device 20 by the screw conveyor pump 74 provided on the second deck portion 51 of the front deck portion 56 . The working oil is sent to the screw conveyor device 20 by joining the working oil.

Also, the shield jack assembling pump 76 provided on the second deck portion 52 of the rear deck portion 57 is connected to the shield jack 11 by the shield jack assembling pump 76 provided on the second deck portion 51 of the front deck portion 56 . Hydraulic oil is sent to the shield jack 11 by joining with the hydraulic oil to be sent. The circulation pump 78 provided on the second deck portion 52 of the rear deck portion 57 circulates cooling water in cooperation with the circulation pump 78 provided on the second deck portion 51 of the front deck portion 56 . Also, the oil cooler 79 provided on the second deck portion 52 of the rear deck portion 57 cools the working oil in cooperation with the oil cooler 79 provided on the second deck portion 51 of the front deck portion 56 .

In this way, after the initial excavation, when the main excavation is carried out, the rear deck portion 57 on which the remaining pumps and the like necessary for the main excavation are mounted is connected to the front deck portion 56 .

As described above, according to the shield machine 1 of the present embodiment, the pumps and the like necessary for at least initial excavation of the machine main body 3 are arranged on the second deck portion 51 of the front deck portion 56 of the rear working deck 50. Therefore, it is not necessary to lay a hose for sending hydraulic oil to each device of the excavator main body 3 (each device necessary for initial excavation) from the ground. This eliminates the labor and cost associated with routing the hose. Moreover, even if the starting shaft 200 is narrow, there is no problem that the narrow space is occupied by the hose.

Further, in the present embodiment, the maintenance space MS in which no pump or the like is arranged is formed on the first deck portion 53 of the front deck portion 56, so maintenance work can be easily performed.

(Other embodiments)
The present invention can be applied not only to a mud pressure type shield machine but also to a slurry type shield machine. This will be explained below.

FIG. 4 is a diagram for explaining the arrangement of hydraulic equipment and the like on the second deck portion 51a of the front deck portion and the second deck portion 52 of the rear deck portion of the slurry shield machine. FIG. 4 shows the state in which the second deck portion 52 is connected to the second deck portion 51a, that is, the state of the rear working deck 50 during main excavation. In addition, in this embodiment, the same reference numerals as in the first embodiment are given to the same constituent elements as in the above-described first embodiment, and the description thereof will be omitted.

As shown in FIG. 4, the second deck portion 51a is formed in a substantially U shape in plan view in order to avoid a region 151a where a mud feed/discharge pipe provided in a slurry type shield machine is arranged.

As in the above embodiment, the second deck portion 51a is provided with a plurality of pumps and the like necessary for the initial excavation. Specifically, the second deck portion 51a has four shield jack propulsion pumps 70, a shield jack low speed pump 71, three agitator pumps 72, a shape retaining device pump 73, and two erectors. A device pump 75 is provided. Further, four shield jack assembly pumps 76, two copy cutter device pumps 77, a circulation pump 78, and an oil cooler 79 are provided on the second deck portion 51a.

In this embodiment, unlike the mud pressure type shield machine 1, the area of the second deck portion 51a is secured larger than that of the second deck portion 51 of the first embodiment because the screw conveyor device 20 is not required. can do. Therefore, among the plurality of pumps for supplying hydraulic oil to the devices of the excavator main body 3, at least the plurality of pumps other than the plurality of pumps necessary for the initial excavation are also arranged on the second deck portion 51a. A part may be arranged on the second deck portion 52 .

As described above, in the slurry shield machine of the present embodiment, the pumps and the like necessary for at least the initial excavation of the machine main body 3 are arranged on the second deck portion 51a of the front deck portion 56 of the rear working deck 50. Therefore, it is not necessary to lay a hose for sending hydraulic oil to each device of the excavator main body 3 (each device necessary for initial excavation) from the ground. This eliminates the labor and cost associated with routing the hose. Moreover, even if the starting shaft 200 is narrow, there is no problem that the narrow space is occupied by the hose.

In addition, the present invention can be modified in various ways without departing from the gist of the invention.

In the above-described embodiment, the second deck portion 51 is provided with two shield jack assemblies that send hydraulic oil to the shield jacks 11 when the shield jacks 11 are shortened when excavation and assembly of the segment ring 100 by the erector device 30 are performed in parallel. However, if excavation and assembly of the segment ring 100 are not performed in parallel, the shield jack assembly pump 76 is unnecessary.

Further, in the above-described embodiment, a plurality of pumps and the like necessary for initial excavation are arranged on the second deck portion 51. may be provided in the second deck portion 52 . For example, one of the two shield jack assembly pumps 76 provided on the second deck portion 51 in FIG. 3 may be provided on the second deck portion 52 . Other pumps are similar.

Furthermore, in the above embodiment, a maintenance space can be formed on the first deck portion 55 of the rear deck portion 57 as well as the maintenance space MS on the first deck portion 53 of the front deck portion 56 .

1 Shield Machine 2 Cutter Head 3 Machine Main Body 11 Shield Jack 20 Screw Conveyor Device 22 Screw Gate Device 30 Erector Device 40 Copy Cutter Device 41 Copy Cutter 42 Agitator 50 Rear Work Deck 51, 51a, 52 Second Deck Section 53, 55 First deck portion 54 Tank 56 Front deck portion 57 Rear deck portion 70 Shield jack propulsion pump (shield jack main excavation pump, second pump)
72 Agitator pump (first pump)
73 shape retention device pump (first pump)
74 screw conveyor pump (first pump)
75 pump for erector device (first pump)
76 Shield jack assembly pump (first pump)
77 Copy cutter device pump (first pump)
78 circulation pump (first pump)
79 oil cooler 80 screw gate pump (first pump)
81 screw conveyor pump (screw conveyor main excavation pump, second pump)
MS maintenance space

Claims (8)

excavator body,
a rear work deck provided in the excavator main body and having a front deck and a rear deck that can be separated from the front deck;
a plurality of pumps for supplying hydraulic oil to devices of the excavator main body;
a tank provided on the front deck portion of the rear work deck and storing the hydraulic oil;
The plurality of pumps include a plurality of first pumps that supply hydraulic oil to the equipment of the excavator body during initial excavation and a plurality of second pumps that supply hydraulic fluid to the equipment of the excavator body during main excavation. ,
The shield machine, wherein the first pump is provided on the front deck portion of the rear work deck. a shield jack for advancing the excavator main body;
an erector device for assembling a segment ring by gripping segments within the excavator main body;
a copy cutter device having a copy cutter provided on a cutter head provided at the tip of the excavator main body and extending and contracting radially outward of the cutter head;
an agitator for agitating the excavated earth and sand in the cutter chamber behind the cutter head;
The first pump is
a shield jack propulsion pump that sends hydraulic oil to the shield jack;
an erector device pump for supplying hydraulic oil to the erector device;
a pump for a copy cutter device that supplies hydraulic oil to the copy cutter device;
2. The shield machine according to claim 1, further comprising an agitator pump for sending hydraulic oil to said agitator. further comprising a shape retaining device that retains the shape of the segment ring assembled by the erector device;
The first pump includes a shape-retaining device pump that sends hydraulic oil to the shape-retaining device, and a circulation pump that circulates cooling water to a hydraulic motor that rotationally drives the cutter head,
3. The shield excavator according to claim 2 , wherein said front deck portion of said rear work deck is further provided with an oil cooler for cooling hydraulic oil in said tank. 3. The first pump includes a shield - jack assembling pump that sends hydraulic oil to the shield jack when shortening the shield jack when excavating and assembling the segment ring by the erector device are performed in parallel. Or the shield machine according to 3 . the front deck section of the aft work deck having a first deck section and a second deck section positioned below the first deck section;
5. The apparatus according to claim 2 , wherein said tank is arranged on said first deck, a maintenance space is formed on the side of said tank, and said first pump is arranged on said second deck. The shield machine according to any one of items 1 and 2. The shield machine is a mud pressure type shield machine that excavates by adding a mud additive to the excavated earth and sand in the cutter chamber to turn the excavated earth and sand into mud and applying mud pressure to the face face for excavation,
a long screw conveyor device for discharging excavated earth and sand from the excavator main body;
a screw gate device provided at the downstream end of the screw conveyor device,
The first pump is
a screw conveyor pump for sending hydraulic oil to the screw conveyor device;
The shield excavator according to any one of claims 2 to 5, further comprising a screw gate pump that feeds hydraulic oil to the screw gate device. 7. The shield excavator according to claim 6, wherein said second pump is provided on said rear deck portion of said rear working deck. The second pump is
a shield jack main excavation pump that joins the hydraulic oil sent to the shield jack by the shield jack propulsion pump and sends the hydraulic oil to the shield jack;
8. The shield excavator according to claim 7, further comprising a screw conveyor main excavating pump that joins the hydraulic oil sent to the screw conveyor device by the screw conveyor pump and sends the hydraulic oil to the screw conveyor device.

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