JP2016138424A - Tunnel drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel drilling machine capable of saving operation labor in discharging used lubricant.SOLUTION: A tunnel drilling machine includes a drilling machine body 10, drive parts 21 and 23 disposed inside the drilling body 10, first lubricant supplying means 24, 25 and 26 which supply lubricant to the drive parts 21 and 23, and second lubricant supply means 27, 30, 31 and 32 which supply the lubricant discharged from the drive parts 21 and 23 to the outside surface 10a of the drilling machine body 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a tunnel excavator.

  In the tunnel excavator, a disc-shaped cutter head is supported by a cutter driving device at a front portion of a cylindrical excavator main body (skin plate) so as to be driven to rotate, and the excavator main body has a rear portion of the excavator main body. A plurality of shield jacks for advancing the main body and an erector device for assembling the segments to the inner wall surface of the existing tunnel (the surrounding wall of the natural ground) are mounted. By extending the shield jack and pressing it against the existing segment, the reaction force from the segment is obtained to advance the excavator body, and the cutter drive device is driven to rotate the cutter head, leading to the front ground Can be excavated.

  A bulk head is provided behind the cutter head, and a chamber is formed between the cutter head and the bulk head. The earth and sand excavated by the cutter head is conveyed rearward by a screw conveyor provided with a front end portion opened in the chamber, and discharged from a rear end portion of the screw conveyor by a belt conveyor or the like.

  In addition, the rotary shaft portion of the cutter head is provided with a rotary joint, through which the lubricating oil is supplied to the cutter head and the mud additive is injected into the chamber. (For example, Patent Document 1).

JP 2003-314190 A

  Grease (lubricant) for reducing the frictional resistance of the sliding contact portion is supplied to the drive portions such as the screw conveyor and the rotary joint as described above. The grease is supplied to the drive unit by a pump and discharged from the drive unit as it is by the pressure of the pump. And the grease discharged | emitted from the drive part is stored in a predetermined container, and is regularly discharged | emitted by the operator outside a tunnel excavator here.

  However, such a grease discharging operation is time-consuming for the operator, and when the grease adheres to the equipment in the machine or the work clothes of the worker, not only the equipment and work clothes become dirty but also the work May cause the person to fall.

  The present invention has been made in view of the above problems, and an object thereof is to reduce the labor of an operator in discharging a used lubricant or the like.

  A tunnel excavator according to a first aspect of the present invention for solving the above problems includes an excavator body, a drive unit disposed inside the excavator body, and a first lubricant supply for supplying a lubricant to the drive unit. And a second lubricant supply means for supplying the lubricant discharged from the drive unit to the outer surface of the excavator body.

  A tunnel excavator according to a second invention for solving the above-mentioned problems is the tunnel excavator according to the first invention, wherein the second lubricant supply means applies a predetermined pressure to the lubricant discharged from the drive unit. A pressure applying portion for applying pressure, a supply hole portion provided facing the outer surface of the excavator body, and a piping portion for connecting the pressure applying portion and the supply hole portion. And

  A tunnel excavator according to a third invention that solves the above problem is the tunnel excavator according to the second invention, wherein the foreign substance contained in the lubricant is removed between the drive unit and the pressure applying unit. A removal means is provided.

  A tunnel excavator according to a fourth invention for solving the above-mentioned problems is the tunnel excavator according to the second or third invention, wherein the supply hole is provided behind and in the vicinity of a partition wall provided in the excavator body. It is characterized by that.

  A tunnel excavator according to a fifth invention for solving the above-mentioned problems is the tunnel excavator according to any one of the second to fourth inventions, wherein a lubricant is provided between the drive unit and the pressure applying unit. Lubricant storage means for temporarily storing is provided.

According to the tunnel excavator according to the first invention, the lubricant discharged from the drive unit is supplied to the outer surface of the excavator body by the second lubricant supply means, so that the used lubrication by the operator is performed. The agent discharge operation can be eliminated. Therefore, the labor of the operator in discharging the used lubricant is reduced.
In addition, by supplying the lubricant to the outer surface of the excavator body, the lubricant is interposed between the outer surface of the excavator body and the inner wall surface of the tunnel, that is, discharged inside the tunnel excavator. By reusing the used lubricant as a lubricant for reducing the frictional resistance between the outer surface of the excavator body and the inner wall surface of the tunnel, the thrust required for the tunnel excavator can be reduced. Thus, by reducing the thrust of the tunnel excavator, it is possible to reduce the size of the propulsion means, and it is possible to prevent the segment from being damaged by the propulsion means.
Also, the lubricant discharged from the drive unit is supplied to the outer surface of the excavator body that is outside the tunnel excavator by the second lubricant supply means, so that the lubricant can be used for the internal equipment and work of the tunnel excavator. It does not adhere to the work clothes of the person. Therefore, it is possible to prevent the equipment and work clothes from becoming dirty and the operator from falling down.

  According to the tunnel excavator according to the second invention, by applying a predetermined pressure to the lubricant discharged from the drive unit by the pressure applying unit, the lubricant is supplied via the piping unit and the supply hole unit. It can be reliably supplied to the outer surface of the excavator body which is outside the tunnel excavator.

  According to the tunnel excavator according to the third aspect of the present invention, the foreign matter contained in the lubricant is removed by the foreign matter removing means provided between the drive unit and the pressure applying unit, thereby allowing the foreign matter to flow into the pressure applying unit. Can be prevented. Therefore, for example, when a pump is used as the pressure applying unit, it is possible to reduce deterioration of pump performance and wear due to foreign matter.

  According to the tunnel excavator according to the fourth invention, by providing the supply hole portion behind and in the vicinity of the partition wall, the piping portion can be disposed not inside the chamber but inside the tunnel excavator. Piping can be easily arranged.

  According to the tunnel excavator according to the fifth aspect of the present invention, the lubricant discharged from the drive unit is temporarily stored by the lubricant storage means, whereby the lubricant discharged from the drive unit is A predetermined pressure can be reliably applied.

It is explanatory drawing which shows the structure of the tunnel excavator which concerns on Example 1. FIG. It is explanatory drawing which shows the path | route of the lubricant agent in the tunnel excavator which concerns on Example 1. FIG.

  Hereinafter, embodiments of a tunnel excavator according to the present invention will be described in detail with reference to the accompanying drawings. Needless to say, the present invention is not limited to the following examples, and various modifications can be made without departing from the spirit of the present invention.

  A structure of a tunnel excavator according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, a tunnel excavator 1 includes a cylindrical skin plate (excavator body) 10 and a disk shape that is rotatably mounted on a front portion (left side in FIG. 1) of the skin plate 10. And a shield jack (propulsion means) 12 and an erector device 13 provided on the rear part (right side in FIG. 1) of the skin plate 10.

  The cutter head 11 is connected to a cutter driving motor 14 provided behind the gear mechanism such as a ring gear (not shown). When the cutter driving motor 14 is driven, the cutter head 11 is connected to the cutter head 11 via the gear mechanism. It is designed to rotate.

  Further, a bulkhead 15 is attached to the skin plate 10 at the rear of the cutter head 11, and a chamber 16 is formed between the cutter head 11 and the bulkhead 15. The cutter head 11, the cutter drive motor 14, and a gear mechanism (not shown) are supported by the skin plate 10 via the bulk head 15.

  Inside the skin plate 10, a screw conveyor 17 is disposed, and the earth and sand excavated by the rotational drive of the cutter head 11 can be discharged to the rear of the tunnel 100. That is, the front end portion (removal port) 18 of the screw conveyor 17 passes through the bulkhead 15 and opens into the chamber 16, and a discharge port (not shown) provided in the rear portion is arranged in the longitudinal direction in the tunnel 100. Not on the belt conveyor. The screw conveyor 17 is configured such that screw wings 22 are rotatably mounted by a screw conveyor drive motor 20 and a screw conveyor drive unit 21 inside a cylindrical tube 19 that is disposed so as to incline backward.

  Therefore, the earth and sand excavated by the rotational drive of the cutter head 11 (excavated earth and sand) is taken into the chamber 16 and then conveyed rearward by the screw conveyor 17 provided with the front end 18 opened in the chamber 16. At the same time, it is discharged from the rear end of the screw conveyor 17 by a belt conveyor (not shown).

  Further, a rotary joint (rotary pipe joint) 23 is provided on the rotation center axis of the cutter head 11, and supply of hydraulic oil to a copy cutter (not shown) in the cutter head 11 is performed via the rotary joint 23. The supply of a mud additive to a mud inlet (not shown) is performed.

  As shown in FIGS. 1 and 2, a tunnel supply machine (first lubricant supply means) 24 that stores grease as a lubricant is provided inside the tunnel excavator 1. The grease supply tank 24 is connected to a grease supply pump (first lubricant supply means) 25, and this grease supply pump 25 is tunneled via a grease supply pipe (first lubricant supply means) 26. Each excavator 1 is connected to each drive unit (in FIG. 1 and FIG. 2, screw conveyor drive unit 21 and rotary joint 23).

  That is, the grease stored in the grease supply tank 24 is supplied to each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23 by driving the grease supply pump 25. In this way, the grease is supplied to each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23, whereby the frictional resistance of the sliding contact portion in each drive unit is reduced.

  Each drive unit (in FIGS. 1 and 2, screw conveyor drive unit 21 and rotary joint 23) is provided with a grease discharge pipe (second lubricant supply means, pipe unit) 27, and screw The grease supplied to each drive unit such as the conveyor drive unit 21 and the rotary joint 23 is discharged from the grease discharge pipe 27. The grease discharge pipe 27 is connected to a grease reuse tank (second lubricant supply means, lubricant storage means) 28, and is discharged from each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23. The used grease (used lubricant after being supplied to each drive unit) is temporarily stored in the grease reuse tank 28.

  That is, when the grease supply pump 25 is driven, the grease stored in the grease supply tank 24 is supplied to each of the drive units such as the screw conveyor drive unit 21 and the rotary joint 23 via the grease supply pipe 26 and is driven by the screw conveyor. The grease supplied to each drive unit such as the section 21 and the rotary joint 23 is discharged to the grease reuse tank 28 via the grease discharge pipe 27.

  The grease reuse tank 28 is connected to a grease reuse pump (second lubricant supply means, pressure application unit) 30 via a strainer (foreign matter removal means) 29 for removing foreign substances contained in the grease. The grease reuse pump 30 is connected to a grease supply hole (second lubricant supply means, second lubricant supply means, pipe portion) 31 provided in the skin plate 10 via a grease reuse pipe (second lubricant supply means, pipe portion) 31. Supply hole portion) 32.

  In other words, the grease discharged from each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23 is temporarily stored in the grease reuse tank 28, and then driven by the grease reuse pump 30, thereby supplying the grease supply hole 32. To the outer surface (outer peripheral surface) 10 a of the skin plate 10.

  Here, it is assumed that the predetermined pressure applied to the grease by the grease reuse pump 30 is higher than the earth pressure from the surrounding wall of the natural ground (pressure outside the tunnel excavator 1). Therefore, the grease can be reliably supplied to the outer surface 10a of the skin plate 10 by the grease reuse pump 30, and there is a risk of reverse grease flow and soil infiltration due to earth pressure on the surrounding wall of the ground in the grease reuse pipe 31. Absent. A valve member such as a check valve may be provided in the grease reuse pipe 31 or the grease supply hole 32 in order to prevent the grease backflow and the earth and sand from entering the grease reuse pipe 31 more reliably.

  Further, upstream of the grease reuse pump 30, that is, between each drive unit and the grease reuse pump 30 (in this embodiment, between the screw conveyor drive unit 21 and the rotary joint 23 and the grease reuse pump 30). In addition, the foreign matter contained in the grease is removed by the strainer 29 provided on the downstream side of the grease reuse tank 28. Therefore, the strainer 29 can prevent foreign matter from flowing into the grease reuse pump 30 and can reduce performance degradation and wear of the grease reuse pump 30 due to foreign matter.

  The strainer 29 does not have to remove all foreign matters contained in the grease, and the mesh member (net-like member) (not shown) has a size that may cause a decrease in performance and wear of the grease reuse pump 30. Any material that can remove foreign substances may be used.

  The grease supply hole 32 is an opening formed so as to face the outer surface 10a of the skin plate 10, and is provided behind and in the vicinity of the bulkhead 15 in the skin plate 10 (front portion of the skin plate 10). A plurality of 10 circumferential directions are provided.

  Thus, by providing the grease supply hole 32 behind and in the vicinity of the bulkhead 15 in the skin plate 10, the grease reuse pipe 31 is not inside the chamber 16 but inside the tunnel excavator 1 (inner circumference of the skin plate 10. Since it can be disposed on the rear side of the bulkhead 15, the grease reuse pipe 31 can be easily disposed.

  Further, by providing a plurality of grease supply holes 32 in the circumferential direction of the skin plate 10, the grease can be supplied from the plurality of grease supply holes 32 to substantially the entire outer surface 10 a of the skin plate 10. Thus, by supplying the grease to the outer surface 10a of the skin plate 10, the frictional resistance between the outer surface 10a of the skin plate 10 and the inner wall surface (circumferential wall) 100a of the tunnel 100 is reduced, and tunnel excavation is performed. The thrust required for the machine 1 is reduced.

  Of course, the supply hole portion in the present invention is not limited to the one provided behind and in the vicinity of the bulkhead 15 in the skin plate 10 as in this embodiment, and the lubricant inside the tunnel excavator 1 is used as the excavator body 10. Any material can be used as long as it can be supplied to the outer surface 10a (between the excavator body 10 and the tunnel 100).

  In order to reduce the frictional resistance between the outer surface of the excavator body and the inner wall surface of the tunnel by the lubricant supplied from the supply hole to the outer surface of the excavator body, It is preferable to provide the part at the front part of the excavator body. For example, grease supply holes 32 that are supply holes may be provided in the vicinity of the cutter head 11 of the skin plate 100 (in front of the bulkhead 15), and a plurality of grease supply holes 32 may be provided in the circumferential direction and the axial direction of the skin plate 100. May be.

  The operation of the tunnel excavator according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  The tunnel excavator 1 rotates the cutter head 11 via a gear mechanism (not shown) by driving the cutter driving motor 14 and extends a plurality of shield jacks 12 to obtain a pressing reaction force from the existing segment S. The excavator body 10 is moved forward to excavate a natural ground ahead (see FIG. 1).

  The earth and sand excavated by the rotational drive of the cutter head 11 is taken into the chamber 16 from a sand and sand intake port (not shown), and is conveyed rearward by a screw conveyor 17 provided with a front end 18 opened in the chamber 16. Then, it is discharged from the rear end of the screw conveyor 17 by a belt conveyor (not shown).

  Next, any one of the shield jacks 12 is operated in the contracting direction to form a space with the existing segment S, and a new segment S is constructed in this space by the erector device 13. By repeating this operation, a tunnel having a predetermined length is excavated and formed.

  In an operation such as excavation of the tunnel excavator 1, the grease stored in the grease supply tank 24 is supplied to each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23 by driving the grease supply pump 25. (See FIGS. 1 and 2). Therefore, grease as a lubricant is supplied to each drive unit (in FIG. 1 and FIG. 2, the screw conveyor drive unit 21 and the rotary joint 23), and the frictional resistance of the sliding contact portion in each drive unit is reduced.

  The grease supplied to each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23 is discharged from the grease discharge pipe 27 and temporarily stored in the grease reuse tank 28.

  Subsequently, by driving the grease reuse pump 30, the grease temporarily stored in the grease reuse tank 28 is supplied from the grease supply hole 32 to the outer surface 10 a of the skin plate 10 (outside of the tunnel excavator 1). doing. Therefore, grease which is a lubricant is supplied to the outer surface 10a of the skin plate 10, and the frictional resistance between the outer surface 10a of the skin plate 10 and the inner wall surface 100a of the tunnel 100 is reduced.

  At this time, the pressure applied to the grease by the grease reuse pump 30 is higher than the earth pressure from the surrounding wall of the natural ground (pressure outside the tunnel excavator 1). Can be reliably supplied to the outer surface 10a of the skin plate 10, and there is no possibility of reverse flow of grease and intrusion of earth and sand due to earth pressure on the peripheral wall of the natural ground in the grease reuse pipe 31.

  Further, upstream of the grease reuse pump 30, that is, between each drive unit and the grease reuse pump 30 (in this embodiment, between the screw conveyor drive unit 21 and the rotary joint 23 and the grease reuse pump 30). Since the strainer 29 for preventing the inflow of foreign matter into the grease reuse pump 30 is provided on the downstream side of the grease reuse tank 28, the grease stored in the grease reuse tank 28 is After the foreign matter contained in the grease is removed, the grease is reused by the grease reuse pump 30 and supplied to the outer surface 10 a of the skin plate 10. Therefore, it is possible to reduce the performance degradation and wear of the grease reuse pump 30 due to foreign matter.

  According to the tunnel excavator 1, grease discharged from each drive unit (in this embodiment, the screw conveyor drive unit 21 and the rotary joint 23) inside the tunnel excavator 1 is tunneled by the grease reuse pump 30. By supplying the outer surface 10a (between the excavator main body 10 and the tunnel 100) of the skin plate 10 which is the outside of the excavator 1, it is possible to eliminate the work of discharging used grease by the operator.

  Further, the grease discharged from each drive unit (in this embodiment, the screw conveyor drive unit 21 and the rotary joint 23) is supplied to the outer surface 10a of the skin plate 10 by the grease reuse pump 30, and the skin plate 10 By reusing as a lubricant for reducing the frictional resistance between the outer side surface 10a and the inner wall surface 100a of the tunnel 100, the thrust required for the tunnel excavator 1 can be reduced. Thus, by reducing the thrust of the tunnel excavator 1, it is possible to reduce the size of the shield jack 12 and to prevent the segment S from being damaged by the shield jack 12.

  In the present embodiment, a grease reuse tank 28 is provided between the screw conveyor drive unit 21 and the rotary joint 23 and the grease reuse pump 30 so that used grease can be temporarily stored in the grease reuse tank 28. I have to. Of course, the tunnel excavator according to the present invention is not limited to this, and it is not necessary to provide the grease reuse tank 28 as the lubricant storage means.

  That is, the grease reuse tank 28 is not provided, and the grease discharged from each drive unit such as the screw conveyor drive unit 21 and the rotary joint 23 is supplied directly to the outer surface 10 a of the skin plate 10 by the grease reuse pump 30. Anyway. Even in this case, foreign matter removing means such as a strainer 29 is provided on the upstream side of the grease reuse pump 30, that is, between each drive unit and the grease reuse pump 30, as necessary.

1 Tunnel excavator 10 Skin plate (Excavator body)
10a Outer surface of skin plate 11 Cutter head 12 Shield jack 13 Elector device 14 Cutter drive motor 15 Bulk head (partition wall)
16 Chamber 17 Screw conveyor 18 Front end 19 of screw conveyor Cylindrical tube 20 Screw conveyor drive motor 21 Screw conveyor drive section (drive section)
22 Screw blade 23 Rotary joint (drive unit)
24 grease supply tank (first lubricant supply means)
25 Grease supply pump (first lubricant supply means)
26 Grease supply piping (first lubricant supply means)
27 Grease discharge piping (second lubricant supply means, piping)
28 Grease reuse tank (lubricant storage means)
29 Strainer (Foreign matter removal means)
30 Grease reuse pump (second lubricant supply means, pressure applying part)
31 Grease reuse piping (second lubricant supply means, piping section)
32 Grease supply hole (second lubricant supply means, supply hole)
100 Tunnel 100a Tunnel inner wall surface

Claims (5)

Excavator body,
A drive unit disposed inside the excavator body;
First lubricant supply means for supplying a lubricant to the drive unit;
A tunnel excavator comprising: a second lubricant supply unit configured to supply a lubricant discharged from the drive unit to an outer surface of the excavator body. The second lubricant supply means includes a pressure applying unit that applies a predetermined pressure to the lubricant discharged from the drive unit, a supply hole provided facing the outer surface of the excavator body, and the pressure The tunnel excavator according to claim 1, comprising a pipe portion that connects the applying portion and the supply hole portion. The tunnel excavator according to claim 2, further comprising a foreign matter removing unit that removes foreign matter contained in the lubricant between the driving unit and the pressure applying unit. 4. The tunnel excavator according to claim 2, wherein the supply hole is provided behind and in the vicinity of a partition wall provided in the excavator main body. The tunnel excavator according to any one of claims 2 to 4, further comprising a lubricant storage unit that temporarily stores a lubricant between the driving unit and the pressure applying unit. .

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