JPH0932466A - Pipe joint device of sludge feeding pipe for use in muddy water discharge type shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow easily following the movement of a shield main body by fitting a joint inner cylinder and a joint outer cylinder together in such a way that they can move relative to each other along the direction of an axis, fixing a sludge feeding pipe and a sludge discharge pipe respectively to front and rear shells, and connecting the sludge feeding pipe to the sludge discharge pipe. SOLUTION: Front and rear shells which constitute a shield main body are expanded and contracted in the direction of an axis to expand and contract a first expansion pipe joint 20a. In this case, the expansion pipe joint device 20a connects together a sludge feeding pipe 11 and a sludge discharge pipe 12 which are fixed respectively to the front and rear shells. Also, a joint inner cylinder 27 smoothly expands within a joint outer cylinder 28 along the direction of the axis until a connecting plate 32, guided by a guide rod by means of a guide hole, abuts to an expansion stopper. Similarly, the joint inner cylinder 27 smoothly contracts within the joint outer cylinder 28 until the connecting plate 32 abuts to a contraction stopper 31b secured to the rear end of the guide rod. Thus because of a double pipe structure in which the joint inner cylinder 27 and the joint outer cylinder 28 are fitted together in such a way as to be movable relative to each other in the direction of the axis, the pipe joint device can follow the relative movements of the front and rear shells when installed in the shield main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint device for sending and discharging mud pipes in a muddy water discharge type shield machine, and more particularly, to a telescopic body in which a front body and a rear body forming a shield body can be relatively moved in an axial direction. The present invention relates to a pipe coupling device for a mud discharge pipe that can follow the movement of a shield body in a muddy water discharge type shield excavator that can perform a segment assembly operation even during a dug operation.

[0002]

2. Description of the Related Art Recently, in order to reduce the construction period of tunnel construction, construction cost, and construction safety, the front body and the rear body constituting the shield body are made to have a telescopic structure capable of relative movement in the axial direction. High-speed construction of the shield construction method, which enables segment assembling even during excavation, has become popular. However, in the muddy water discharge type shield machine, the high speed construction of the shield construction method has not yet been implemented because the pipe joints of the mud discharge pipe between the front body and the rear body become complicated. As a first prior art relating to a pipe joint for a mud discharge pipe in a mud discharge type shield machine, which is not a telescopic structure, as shown in FIG.
116598 ”will be described. Shield machine 57
In the telescopic double-pipe device connected between the sludge transfer pump 59 and the discharge pipe 51 attached to the pressure-tight seal packing 50, which is in sliding contact with the inner surface of the outer pipe 55 at the open end of the inner pipe 54.
Is attached, a pressure-resistant seal packing 60 that slides in contact with the outer surface of the inner pipe 54 is attached to the open end of the outer pipe 55, and a sealed space 61 is formed between the inner and outer pipes. The discharge pipe 63 of the water pump 62 that absorbs water from the tank 69 is connected via a stop valve 64, and the nozzle 65 is further connected with a return water pipe 68 leading to the water tank 69 via a stop valve 66 and a pressure regulating valve 67. A telescopic double tube device for excavator 57 is described.

The expansion / contraction double pipe device for the shield machine 57 having the above-described structure operates as follows. The earth and sand generated by excavating the tunnel 56 with the shield machine 57 is
When it is conveyed to the sludge transfer pump 59 by the belt conveyor 58, it is supplied from a sludge material and a muddy water supply pipe (not shown) in the sludge transfer pump 59, and after being agitated with the sludge material and the muddy water, it is discharged through the inner pipe 54 to the outside. It is conveyed from the pipe 55 to a processing facility on the ground. At this time, water is sent from the water pump 62 through the discharge pipe 63, the stop valve 64 and the nozzle 65 to the sealed space 61 between the inner and outer pipes, and also through the stop valve 66, the pressure regulating valve 67 and the return water pipe 68. It is returned to the water tank 69. Therefore, by adjusting the pressure adjusting valve 67, the water pressure in the sealed space 61 between the inner and outer pipes is adjusted, and the inner pipe and the outer pipe 5 are adjusted.
It prevents the sludge in 5 from leaking out of the tube.

As a second conventional technique, "Actual Kaihei 2-47289" shown in FIG. 10 will be described. In the muddy water shield excavator 71 supply / discharge mud pipe device, it is divided into an appropriate length and divided into two semicircular cross sections along the length direction, which can be assembled and extended as the excavator moves forward. Attached to the excavator, with the outer tube 74 fixed in a simple tunnel,
A watertight material 8 having a smaller diameter than the outer pipe 74 and having elasticity so as to be capable of closely sliding contact with the inside of the outer pipe 74 at the outer periphery of the opening end inserted into the outer pipe 74.
There is described a supply / drainage mud pipe connecting device for a muddy water shield excavator, which is composed of an inner pipe 78 in which 0 is mounted.

The supply / exhaust mud pipe device of the muddy water type shield excavator 71 having the above-described structure operates as follows. Shield excavator 71
The inner pipes 7 connected to the mud supply pipe 76 and the mud discharge pipe 77 attached to the bulkhead 73 of the excavator 71 as the excavation of
5, 78 are guided by the carriages 85, 86 to move to the cutter head 72 side in the mud supply outer pipe 74 and the mud discharge outer pipe 79 fixed in the tunnel. At this time, each inner pipe 7
Elastic watertight member 80 installed at the tip of 5,78
Slides on the inner peripheral surfaces of the outer tubes 74, 79 while maintaining watertightness. Thus, after the inner pipes 75, 78 have moved a certain distance, the first outer pipes 75, 78 are installed on the respective semicircular portions 74a, 79a of the new outer pipes which are divided into upper and lower outer circumferences. The flanges 74b and 79b are connected to each other by a fixing member 82 to be integrated, and the new outer pipes 74 and 79 for the new installation are the most advanced outer pipes for supplying mud 74 and outer pipes for exhausting mud 79 existing in the tunnel. To the fixing member 84.

[0006]

However, the first conventional technique has the following drawbacks. Since the expansion / contraction double pipe device is a facility behind the shield machine 57, there is no restriction on the installation space, and the guides for the inner pipe 54 and the outer pipe 55 are the tunnels 56.
It is configured to be guided by rollers on the rails installed inside, but in this configuration, the front body and the rear body that form the shield body are installed in a telescopic shield machine with relative movement in the axial direction. That was impossible in space. Furthermore, following the shield machine, the inner pipe 54
Also, rails and rollers are required to move the outer tube 55, which causes a problem of large scale equipment.

The second conventional technique has the following drawbacks. This mud pipe connection device is a mud type shield excavator 71
Mud pipe 76 and mud pipe 7 attached to the bulkhead 73
Each of the inner pipes 75, 78 connected to 7 moves to the cutter head 72 side in the mud supply outer pipe 74 and the mud discharge outer pipe 79 fixed in the tunnel, and shields against the tunnel. When the excavator 71 bends, an unreasonable force acts on the watertight member 80 to cause a problem in durability of the watertight member 80 and a problem that water leaks from the watertight member 80.
In addition, it was impossible in space to install this supply / drainage mud pipe connection device in the telescopic shield machine. Further, carts 85, 86 supporting the inner pipes 75, 78
Was necessary, and there was a problem that the equipment would be large-scale. The present invention has been made to solve the above-mentioned problems of the prior art, and provides a pipe joint device for a mud discharge pipe in a mud discharge type shield machine capable of following the movement of the shield body with a simple configuration. With the goal.

[0008]

A first invention of a pipe joint device for a mud discharge pipe in a mud discharge type shield machine according to the present invention is a front body 1a and a rear body 1b which constitute a shield body 1.
In a muddy water discharge type shield machine having a telescopic structure in which and relatively move in the axial direction, a mud pipe 11 and a mud pipe 12 fixed to the front body 1a, and a mud pipe fixed to the rear body 1b. 11 and the mud pipe 12, and a pipe joint device 20a for connecting the mud pipe 11 and the mud pipe 12
20b, and the joint inner cylinder 27 and the joint outer cylinder 28 constituting the pipe joint devices 20a and 20b have a double pipe structure in which they are relatively movable in the axial direction, and the joint inner cylinder 27 and the joint. It comprises guide means 29, 45 for guiding relative movement in the axial direction with the outer cylinder 28.

The guide means 45 may be installed between the outer peripheral surface of the joint inner cylinder 27 and the inner peripheral surface of the joint outer cylinder 28, and the guide means 29 is fixed to the joint outer cylinder 28 and outside the joint. You may install in the extension direction of the joint inner cylinder 27 from the end part of the cylinder 28. An expansion / contraction regulating stopper 46 that restricts the amount of expansion / contraction of the joint inner cylinder 27 and the joint outer cylinder 28 may be installed inside the joint outer cylinder 28. At least one of the expansion and contraction restriction stoppers 31a and 31b for restricting the expansion amount or contraction amount of the guide means 2
You may install in 9. In addition, it may be configured by a connecting plate 32 that connects the joint inner cylinders 27 that expand and contract in the joint outer cylinders 28 of the mud pipes 11 and 12 fixed to the rear body 1b.

A second aspect of the pipe joint device for a mud discharge pipe according to the present invention is a mud discharge type in which a shield body 1 is composed of a front body 1a and a rear body 1b. In the shield machine, the mud pipe 11 and the mud pipe 12 fixed to the front body 1a, the mud pipe 11 and the mud pipe 12 fixed to the rear cylinder 1b, and the mud pipe 11 and the drain pipe The pipe coupling device 20c connects the mud pipes 12 to each other. The pipe coupling device 20c includes a flexible pipe 30 connected to each end of the mud pipe 11 and the mud pipe 12.

The pipe joint device 20c is installed outside the outer periphery of the flexible pipe 30, and is connected to the connecting plate 32 fixed to each end of the mud pipe 11 and the mud pipe 12 and each mud pipe end. The plate 33 and the sludge pipe end plate 34 may be connected to each other via a universal joint 35 to include an expansion restricting means 36 for restricting the expansion amount of the flexible tube 30.
Reference numeral 6 denotes both ends of the connecting rod 37 installed on the outer peripheral portion of the flexible pipe 30, the connecting plate 32 fixed to each end of the mud feeding pipe 11 and the mud discharging pipe 12, each mud feeding pipe end plate 33 and the discharging pipe. It may be configured by a spherical joint 35 installed between the mud pipe end plate 34 and the pipe joint device 20c. The connecting plate 32 is fixed to each end of the mud pipe 11 and the mud pipe 12.
And a contraction regulating means 3 installed between the mud pipe end plate 33 and the sludge pipe end plate 34 and for regulating the contraction amount of the flexible pipe 30.
8 may be installed, and the contraction restricting means 38 is a flexible tube 3
The collar 38 that covers the outer periphery of 0 may be used. Further, instead of the mud pipe 11 and the mud pipe 12 fixed to the rear body 1b for connecting the flexible pipe 30, a pipe joint device 20a for the mud pipe in the mud discharge type shield machine. , 20
b, the mud pipe 11 and the mud pipe 1 fixed to the rear body 1b
The joint outer cylinder 28 or the joint inner cylinder 27 that expands and contracts with respect to 2.
May be connected.

[0012]

The pipe joint device (expansion pipe joints 20a, 20b) for the mud discharge pipe according to the present invention having the above-described structure operates as follows. In a muddy water drainage type shield machine having a telescopic structure, when the front body 1a and the rear body 1b forming the shield body 1 move relative to each other in the axial direction, the mud pipe 11 and the mud pipe fixed to the front body 1a 12 and the sludge pipe 11 and the sludge pipe 12 fixed to the rear body 1b also relatively move in the axial direction. However, the pipe joint devices 20a and 20b connecting the mud pipe 11 and the sludge pipe 12 have a double pipe structure including a joint inner cylinder 27 and a joint outer cylinder 28 that are fitted so as to be relatively movable in the axial direction. Therefore, it is possible to follow the movement of the front body 1a and the rear body 1b. In addition, the joint inner cylinder 27 and the joint outer cylinder 2
Since the relative movement in the axial direction with respect to 8 is guided by the guide means 29 and 45, an unreasonable force does not act on the joint inner cylinder 27 and the joint outer cylinder 28.

If the guide means 45 is installed between the outer circumference of the joint inner cylinder 27 and the inner circumference of the joint outer cylinder 28, the joint outer cylinder 2
Since the structure is compact because it is housed inside 8, the guide means 29 is fixed to the rear body 1b, and if it is installed in the extension direction of the joint inner cylinder 27 from the rear body 1b, it is arranged outside the joint outer cylinder 28. This makes maintenance and inspection easier. Further, if expansion / contraction regulating stoppers (rear ends of the joint outer cylinder 28) and 46 for restricting the amount of expansion / contraction of the joint inner cylinder 27 and the joint outer cylinder 28 are installed inside the mud pipes 11, 12, Like the guide means 45, the structure is compact because it is housed in the mud pipes 11 and 12, and the expansion and contraction stoppers 31a and 31b for restricting the expansion and contraction amount of the joint inner cylinder 27 and the joint outer cylinder 28 are provided to the guide means 29. If it is installed in the same manner, it will be arranged outside the joint outer cylinder 28 like the guide means 29, and maintenance and inspection will be easy. In addition, the mud pipes 11, 1 fixed to the rear body 1b
If the joint inner cylinders 27 that expand and contract inside the joint outer cylinders 2 of 2 are connected by the connecting plate 32, the strength of the pipe joint devices 20a and 20b can be improved as compared with the case where they are separate.

Further, the pipe joint device (flexible pipe joint 20c) of the mud transmission pipe according to the present invention operates as follows. In a muddy soil discharge type shield excavator in which the shield body 1 is composed of a front body 1a and a rear body 1b, for example, in an articulated shield machine, the front body 1a and the rear body 1b are bent, but the front body 1a Mud pipe 11 and sludge pipe 12 fixed to the
And the mud pipe 11 and the mud pipe 12 fixed to the rear body 1b
Is connected by a pipe joint device 20c composed of a flexible tube 30, so that the mud pipe 11 and the mud pipe 12 fixed to the front body 1a and the rear body 1b are bent by the flexible tube 30. It can move following the shield body 1.

One of the pipe joint devices 20c is connected to the mud pipe 1
1 and the connecting plate 32 fixed to each end of the sludge pipe 12, and the other side of the sludge pipe end plate 33 and the sludge pipe end plate 34 fixed to the sludge pipe 11 and the sludge pipe 12, respectively. Since the expansion restricting means 36 for restricting the expansion amount of the flexible tube 30 is connected through the universal joint 35, even if the bending amount of the front body 1a and the rear body 1b of the shield machine becomes large. Unreasonable force does not act on the flexible tube 30. Both ends of the connecting rod 37 provided with the expansion restricting means 36 on the outer peripheral portion of the flexible pipe 30, the connecting plate 32 fixed to each end of the mud feeding pipe 11 and the sludge draining pipe 12, and each mud feeding pipe end. If the spherical joint 35 is installed between the plate 33 and the mud pipe end plate 34, the structure is simplified. In addition, the flexible tube 3
Since the contraction restricting means 38 for restricting the contraction amount of 0 is provided, even if the bending amount of the front body 1a and the rear body 1b of the shield machine becomes large, an unreasonable force may act on the flexible tube 30. Absent. If the contraction restricting means 38 is the collar 38 that covers the flexible tube 30, not only the unreasonable force acting on the flexible tube 30 is prevented, but also the flexible tube 30 is covered and protected.

Further, instead of the mud pipe 11 and the mud pipe 12 fixed to the rear body 1b for connecting the flexible pipe 30, the pipe of the mud pipe in the mud discharge type shield machine is replaced. If it is configured to connect the joint outer cylinder 28 or the joint inner cylinder 27, which expands and contracts with respect to the mud pipe 11 and the mud pipe 12 fixed to the rear body 1b of the joint devices 20a and 20b,
The mud sending pipe 11 and the mud discharging pipe 12 can be reliably made to follow both expansion and contraction and bending of the front body 1a and the rear body 1b of the shield machine.

[0017]

EXAMPLES Examples of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a diagram showing a mud discharge type shield machine having a telescopic structure equipped with a first embodiment (expansion pipe joint) of a pipe coupling device for a mud transmission pipe according to the present invention, and FIG. 3A is a front view, FIG. 3B is a cross-sectional view taken along line AA, FIG. 3 is a detailed view of a portion P in FIG. 1, FIG. 3A is a side view, and FIG. The figure which shows CC cross section, FIG. 4 is a partial detailed view of FIG. 3, (A) is a rear view,
3B is a view showing a BB cross section of FIG. 3B, and FIG.
Part (A) is a detailed view of (A) is a detailed view of Q part, (B) is DD
The figure which shows a cross section, (C) is a figure which shows an EE cross section, FIG. 6 is a figure which shows the 2nd Example (2nd expansion pipe joint) of the pipe joint apparatus of the sludge discharge pipe which concerns on this invention, FIG. 7 is an operation explanatory view of the first embodiment of the pipe joint device for a mud discharge pipe according to the present invention, and FIG. 8 is a third embodiment (flexible pipe joint) of the pipe joint device for a mud pipe according to the present invention.
FIG.

As shown in FIGS. 1 and 2, in a muddy water discharge type shield machine having a telescopic structure, a shield body 1 has a cylindrical front body 1a and a cylinder arranged behind the front body 1a. It is divided into a rear body 1b. The front portion of the rear body 1b is slidably fitted to the front body 1a so as to be inscribed in the front body 1a, and the rear portion of the rear body 1b is expanded to have the same diameter as the front body 1a. ing. Further, the first and second seals 2 and 3 are arranged at the sliding portions between the front body 1a and the rear body 1b to prevent water, earth and sand, etc. from entering through the sliding portions.

Further, a partition wall 4 fixed to the front portion of the front body 1a
The cutter head 5 is rotatably supported by the
An individual cutter drive motor 6 is mounted, and a cutter drive gear 8 is meshed with a pinion 7 of the cutter drive motor 6, and the cutter head 5 driven by the cutter drive motor 6 rotates to excavate the natural ground. It is supposed to be done. Further, a chamber 9 is installed between the partition wall 4 and the cutter head 5 for taking in the earth and sand excavated by the cutter head 5 and mixing the earth and sand with the muddy water supplied by the mud pipe 11 to create mud. The mud in the chamber 9 is conveyed from the mud discharge pipe 12 from the inside of the shield body 1 to the rear of the shield machine.

A mounting frame 13 is mounted on the rear body 1b, and an erector swing hydraulic motor 14 and an erector support frame 15 are fixed to the mounting frame 13.
An erector swivel gear 17 is rotatably mounted on the erector support frame 15 via a bearing 16, and this erector swivel gear 17 fixes a cylindrical erector body 19 having an erector link 18 mounted thereon. Inside the erector main body 19, there are installed the mud-delivery pipes 11 and 12 and the pipe joints 20a, 20b and 20c of the present invention for connecting them. A segment 21 is assembled in a ring shape by the erector 10 on the rear inner circumference of the rear body 1b, and between the outer circumference of the segment 21 and the outer circumference of the segment 21, a tail seal 22 mounted on the inner circumference of the rear body 1b is used for earth and sand and groundwater. Alternatively, the backing material is prevented from entering.

A plurality of shield jacks 23 are concentrically provided on the inner circumference of the rear body 1a, and a spreader 26 mounted on the tip of these shield jacks 23 is provided.
When is pressed against the end surface of the existing segment 21, a propulsive reaction force is applied from the segment 21 to the rear body 1a. Further, the bracket 24 fixed to the front case 1a and the mounting frame 13 fixed to the rear case 1b are concentrically arranged, and are connected by six swingable propelling jacks 25.

The operation of the above configuration will be described. The cutter head 5 rotatably supported on the partition wall 4 of the mud drainage type shield machine having a telescopic structure has three cutter drive motors 6 fixed to the partition wall 4, and a pinion 7 and a cutter drive gear 8. It is driven to rotate. At the same time, when the six propelling jacks 25 that swingably connect between the bracket 24 fixed to the front case 1a and the mounting frame 13 fixed to the rear case 1b are extended, the cutter head is cut through the front case 1a. Propulsive force is given to 5 and the ground is excavated.

The earth and sand excavated by the cutter head 5 are
It is taken into the chamber 9 formed between the partition wall 4 and the cutter head 5, and the earth and sand are mixed with the muddy water supplied by the mud-sending pipe 11 to create mud, and the mud-drain pipe 12 to the inside of the shield body 1 Transport to the rear of the shield machine. When the tunnel is dug by the length of the segment 21 by the cutter head 5 in this manner, the plurality of shield jacks 23 concentrically provided on the inner circumference of the rear body 1b are extended and the tip of the shield jack 23 is extended. The spreader 26 attached to the section is pressed against the end surface of the existing segment 21 to
When the shield jack 23 is contracted after the rear body 1b is propelled by receiving the propulsive force from No. 1 and the shield jack 23 is contracted, a space corresponding to the length of the segment 21 is formed between the end surface of the existing segment 21 and the spreader 26. It

The segment 21 thus formed
In the space for the length of, the erector swing hydraulic motor 14 fixed to the mounting frame 13 mounted on the rear body 1b allows the erector support frame 15 also fixed to the mounting frame 13 to rotate via bearings 16. The segment 21 is wound by the cylindrical erector body 19 with the erector link 18 mounted, which is fixed to the erector turning gear 17 mounted on the. The tail seal 22 attached to the inner periphery of the rear part of the rear body 1b is the
The gap between the outer circumference of the segment 21 and the outer circumference of the segment 21 wound in a ring shape is prevented by the entry of earth, sand, ground water, backfill material, or the like. Even while the segment 21 is being rolled up, the propulsion jack 25 is extended as described above to apply a propulsive force to the cutter head 5 to excavate the natural ground. Since the operation is performed, high-speed construction of the tunnel becomes possible. Inside the erector main body 19, the sludge sending and discharging pipes 11 and 12 are arranged, and are connected by an expansion pipe joint 20a of the sending and discharging sludge pipe of the present invention.

3 to 5, the first embodiment of the pipe joint device for the mud pipe of the present invention (the first expansion pipe joint 2)
0a) will be described. This first embodiment (first
The expansion pipe joint 20a) connects the mud feeding pipe 11 and the mud discharging pipe 12 fixed to the front body 1a and the mud feeding pipe 11 and the mud discharging pipe 12 fixed to the rear drum 1b so that they can expand and contract. The joint inner cylinder 27 constituting the expansion joint 20a is connected to the mud feed pipe 11 and the sludge discharge pipe 12 fixed to the front case 1a, and is axially movable relative to the outer diameter portion of the joint inner cylinder 27. The fitting outer cylinder 28, which is fitted to form a double pipe structure, has a flange 39.
The outer cylinder body 28a and the outer cylinder 28 are connected to each other, and the rear end of the outer cylinder 28b is connected to the mud sending pipe 11 and the mud discharging pipe 12 fixed to the rear case 1b.

The front end portion of the joint outer cylinder 28 is integrally connected by a connecting plate 41, and the connecting plate 41 is provided with two guide rods 29a facing axially forward.
Further, the front end of the joint inner cylinder 27 is integrally connected by a connecting plate 32, and the connecting plate 32 is formed with guide holes 29b into which the guide rods 29a are loosely fitted. The guide means 29 of the joint inner cylinder 27 relative to the joint outer cylinder 28 constitutes 29b. Further, a shrinkage restriction stopper 31 is provided at the front end of the joint outer cylinder 28 of the guide rod 29a.
b is fixed, an extension regulating stopper 31a is fixed to the front end portion of the guide rod 29a, and the two extension regulating stoppers 31a are connected by a connecting member 31c. As shown in FIG. 5 (A), between the outer diameter portion of the joint inner cylinder 27 and the inner diameter portion of the joint outer cylinder 28, muddy water is sealed by two seals 42, 42 that are spaced apart in the axial direction. There is.

The construction of the third embodiment (flexible joint 20c) relating to the pipe joint device for the mud pipe of the present invention will be described. Inner cylinder 27 for each joint of the mud pipe 11 and the mud pipe 12
Plate 32 that integrally connects the front ends of the pipes, and the mud pipe end plate 33 and the mud pipe end plate that are fixed to the respective ends of the mud pipe 11 and the mud pipe 12 fixed to the front body 1a The flexible tubes 30 are connected to the respective parts 34. Also,
The connecting plate 32, the mud pipe end plate 33, and the mud pipe end plate 34 are connected by the spherical joints 35 installed at both ends of the two connecting rods 37 installed outside the outer circumference of the flexible tube 30. The flexible joint 20c constitutes the expansion restricting means 36 of the flexible pipe 30, and the flexible joint 20c is provided between the connecting plate 32, the mud feed pipe end plate 33 and the sludge pipe end plate 34, and the flexible pipe. A contraction restricting means 38 for restricting the contraction amount of the flexible tube 30 is configured by a collar 38a that covers the outer periphery of the flexible tube 30. Further, a predetermined number of inspection holes 4 are provided on the cylindrical surface of the collar 38a.
3 is provided so that the condition of the flexible tube 30 can be inspected.

Referring to FIG. 6, the construction of the second embodiment (expansion pipe joint 20b) relating to the pipe joint of the mud transmission pipe according to the present invention will be described. Joint outer cylinder 28 fixed to the rear body 1b
A guide member 45a is fixed to the outer periphery of the joint inner cylinder 27 in each inner peripheral portion of the guide member 45a. By sliding the outer periphery of the guide member 45a along the inner peripheral portion of the joint outer cylinder 28, the guide means is formed. It comprises 45. Further, the guide member 45a is brought into contact with the rear end of the joint outer cylinder 28 to serve as an extension regulating stopper for the joint inner cylinder 27, and the guide member 45a is fixed to each inner peripheral portion of the joint outer cylinder 28 fixed to the rear case 1b. The stopper 46 is brought into contact with the stopper 46 to serve as a contraction restriction stopper.

[0029]

The pipe joint device (first expansion pipe joint 20a, second expansion pipe joint 20 according to the present invention having the above-mentioned structure is constructed.
b, the flexible pipe joint 20c) acts as follows. In a muddy soil discharge type shield machine having a telescopic structure, when the front body 1a and the rear body 1b forming the shield body 1 are expanded and contracted in the axial direction, the first expansion joint 20a moves forward as shown in FIG. The expansion pipe joint device 20a that connects the mud feed pipe 11 and the mud discharge pipe 12 fixed to the trunk 1a and the mud feed pipe 11 and the mud discharge pipe 12 fixed to the rear trunk 1b also expands and contracts. At this time, the connection plate 32 has the guide hole 29
Since it is guided to the guide rod 29a by b, the joint inner cylinder 27 is kept until the connecting plate 32 comes into contact with the extension regulating stopper 31a fixed to the front end of the guide rod 29a.
Can smoothly extend in the joint outer cylinder 28 in the axial direction without exerting an excessive force. Similarly, the connection plate 3
The inner tube 27 of the joint is the outer tube 2 of the joint until 2 comes into contact with the contraction regulation stopper 31b fixed to the rear end of the guide rod 29a.
The inside of 8 can be smoothly contracted in the axial direction without applying excessive force. In this way, since the joint inner cylinder 27 and the joint outer cylinder 28 have a double pipe structure in which they are fitted so as to be relatively movable in the axial direction, they are compactly installed in the shield body 1 and the front body 1a It is possible to follow the relative movement of the rear body 1b.

Next, the second expansion joint 20b shown in FIG.
The operation of will be described. The outer circumference of the guide member 45a fixed to the outer circumference of the joint inner cylinder 27 slides on the inner peripheral parts of the joint outer cylinder 28 fixed to the rear case 1b, so that the joint inner cylinder 27 is inside the joint outer cylinder 28. Can be moved smoothly in the axial direction without applying excessive force. The guide member 45a
The joint inner cylinder 27 extends inside the joint outer cylinder 28 until the abutment contacts the rear end of the joint outer cylinder 28.
The joint inner cylinder 27 contracts inside the joint outer cylinder 28 until it comes in contact with the stoppers 46 installed on the inner peripheral portions of the joint outer cylinder 28 fixed to the joint outer cylinder 28. The first and second expansion joints 20a, 20
In b, both expansion and contraction restricting means are installed, but it is also possible to restrict either one by the stroke of the propulsion jack 25.

The operation of the flexible pipe joint 20c will be described. Even in the muddy soil discharging type shield machine having the telescopic structure shown in FIGS. 1 and 2, the direction of the tunnel can be corrected by bending the front body 1a and the rear body 1b by a predetermined amount under the control of the propulsion jack 25. . At this time, assuming that the flexible pipe joint 20c is bent in the direction of the arrow R as shown in FIG.
And the sludge pipe end plate 33 and the sludge pipe end plate 34 are respectively connected to each other by the flexible pipe 30 to bend the sludge pipe 11 and the sludge pipe 12 between the front body 1a and the rear body 1b. Can be smoothly followed.

When the flexible pipe joint 20c is bent as described above, the connecting plate 32, the mud feeding pipe end plate 33 and the mud feeding pipe end plate 34 are installed at both ends of the two connecting rods 37, respectively. Since the expansion amount of the flexible tube 30 is restricted by the spherical joint 35, it is possible to prevent the flexible tube 30 from being damaged due to excessive expansion. Further, the flexible pipe joint 20c is connected to the connecting plate 3
2, between the mud pipe end plate 33 and the mud pipe end plate 34,
In addition, the flexible tube 3 is provided by the collar 38 that covers the outer periphery of the flexible tube 30.
Since the contraction amount of 0 is regulated, it is possible to prevent the flexible tube 30 from being damaged due to excessive contraction. In particular, in the articulated muddy soil discharge type shield machine, the front body 1a
Since the rear body 1b and the rear body 1b are largely bent, the flexible pipe joint 20c
Is required.

[0033]

As described above, the following effects can be obtained by the pipe joint device for the mud discharge pipe in the mud discharge type shield machine according to the present invention. (1) The expansion joint in the pipe joint device according to the present invention is
The inner pipe of the joint and the outer pipe of the joint that form a pipe joint device that connects the mud pipe and the mud pipe fixed to the front body with the mud pipe and the mud pipe fixed to the rear drum are in the axial direction. Since it has a double pipe structure that is fitted so as to be movable relative to each other, it can be compactly installed in the shield body. Further, the guide means for guiding the relative movement of the joint inner cylinder and the joint outer cylinder in the axial direction allows the joint inner cylinder and the joint outer cylinder to be smoothly expanded and contracted without applying an undue force. (2) Guide means for the inner joint tube with respect to the outer joint tube,
If it is installed between the outer circumference of the joint inner cylinder and the inner circumference of the joint outer cylinder,
The structure is compact because it fits inside the joint outer cylinder, and if it is fixed to the joint outer cylinder and installed in the extension direction of the joint inner cylinder from the end of the joint outer cylinder, it will be placed outside the joint outer cylinder. Inspection becomes easy. (3) If an expansion / contraction restriction stopper that restricts the amount of expansion / contraction of the joint inner cylinder and the joint outer cylinder is installed between the outer circumference of the joint inner cylinder and the inner circumference of the joint outer cylinder, the joint outside as well as the guide means. Since it is housed in the cylinder, the structure is compact, and if it is installed in the guide means, it is arranged outside the joint outer cylinder in the same manner as the guide means, and maintenance and inspection becomes easy. (3) By connecting the joint inner cylinders that expand and contract in the joint outer cylinders of the mud pipes fixed to the rear body with the connection plate, the strength of the pipe joint device is improved compared to the case of separate cases. it can.

(4) The flexible pipe joint in the pipe joint device according to the present invention includes a connecting plate installed outside the outer periphery of the flexible pipe and fixed to each end of the mud pipe and the mud pipe. Since the sludge pipe end plate and the sludge discharge pipe end plate are connected via a universal joint, and the expansion restricting means for restricting the expansion amount of the flexible pipe is provided, the front trunk and the rear trunk of the shield machine Even if the amount of bending of the flexible tube becomes large, an unreasonable tensile force does not act on the flexible tube, so that the durability of the flexible tube can be significantly improved. (5) The extension restricting means is installed between both ends of the connecting rod installed on the outer peripheral portion of the flexible pipe, and the connecting plate and each flange fixed to each end of the mud sending pipe and the mud sending pipe. If the spherical joint is used, the structure is simplified. (6) The flexible pipe joint in the pipe joint device according to the present invention is
Since the contraction restricting means for restricting the contraction amount of the flexible tube is provided, even if the bending amount of the front body and the rear body of the shield machine becomes large, an unreasonable compression force does not act on the flexible joint,
The durability of the flexible tube can be greatly improved. (7) If the contraction restricting means is a collar that covers the flexible tube, not only is it possible to prevent an unreasonable compressive force acting on the flexible tube, but also to cover the flexible tube and protect it from the outside. (8) The flexible pipe joint in the pipe joint device according to the present invention comprises:
By connecting the expansion pipe joint and the flexible pipe joint to the series at the same time to connect the mud pipes and the mud pipe, both expansion and contraction of the front body and the rear body of the shield machine can be performed. The mud pipe and the mud pipe can be reliably followed.

[Brief description of drawings]

FIG. 1 is a diagram showing a muddy water discharge type shield machine having a telescopic structure equipped with a first embodiment (first expansion joint) of a pipe coupling device for a mud discharge pipe according to the present invention.

2 is a partial detailed view of FIG. 1, (A) is a front view, (B)
FIG. 6 is a diagram showing a cross section taken along line AA.

3 is a detailed view of a portion P of FIG. 1, (A) is a side view, (B) is a view showing a cross section CC of (A).

4 is a partial detailed view of FIG. 3, where (A) is a rear view and (B) is a rear view.
FIG. 4 is a diagram showing a cross section taken along the line BB of FIG.

FIG. 5 is a detailed view of a part of FIG. 3, in which (A) is a detailed view of a Q portion,
(B) is a figure which shows DD cross section, (C) is a figure which shows EE cross section.

FIG. 6 is a view showing a second embodiment (second expansion joint) of a pipe joint device for a mud transmission pipe according to the present invention.

FIG. 7 is an explanatory view of the action of the first embodiment (first expansion joint) of the pipe joint device for a mud transmission pipe according to the present invention, in which (A) is a diagram in which the expansion joint is contracted, B) is a diagram in which the expansion joint is extended.

FIG. 8 is an operation explanatory view of the third embodiment (flexible pipe joint) of the pipe joint device for a mud transmission pipe according to the present invention.

FIG. 9 is a diagram showing a first conventional technique.

10A and 10B are views showing a second conventional technique, in which FIG. 10A is an overall side sectional view, FIG. 10B is a diagram showing a main part, and FIG. 10C is a diagram showing a rear surface of FIG.

[Explanation of symbols]

 1 Shield main body 1a Front body 1b Rear body 2 First seal 3 Second seal 4 Partition wall 5 Cutter head 6 Cutter drive motor 7 Pinion 8 Cutter drive gear 9 Chamber 10 Electa 11 Mud pipe 12 Mud pipe 13 Mounting frame 14 Elector swivel Hydraulic motor 15 Support frame 16 Bearing 17 Elector swivel gear 18 Electa link 19 Electa body 20a Expansion joint (pipe joint device) 20b Expansion joint (pipe joint device) 20c Flexible pipe joint (pipe joint device) 21 Segment 22 Tail seal 23 shield jack 24 bracket 25 propelling jack 26 spreader 27 joint inner cylinder 28 joint outer cylinder 28a outer cylinder body 28b outer cylinder 29,45 guide means 30 flexible tube 31a expansion restriction stopper 31b shrinkage restriction stopper 32 coupling plate 33 mud feeding Pipe end plate 34 Drainage pipe end plate 35 Spherical joint (universal joint) 36 Expansion regulating means 37 Connecting rod 38 Shrinkage regulating means 38a Collar 39 Flange 41 Connecting plate 42 Seal 43 Inspection hole 45a Guide member 46 Stopper

Claims (12)

[Claims] 1. A front body (1) constituting a shield body (1).
In a muddy water discharge type shield machine having a telescopic structure in which a) and a rear body (1b) move relative to each other in an axial direction, a mud pipe (11) and a muddy pipe (11) fixed to the front body (1a). 12), a mud pipe (11) and a mud pipe (12) fixed to the rear body (1b), and these mud pipes (1)
1) and a pipe coupling device (20) for connecting the sludge pipe (12)
a, 20b), and this pipe coupling device (20a, 2b
0b) the inner joint tube (27) and the outer joint tube (28)
Has a double pipe structure which is fitted so as to be relatively movable in the axial direction, and guide means (29, 45) for guiding the relative movement in the axial direction between the joint inner cylinder (27) and the joint outer cylinder (28). A pipe coupling device for a mud discharge pipe in a mud discharge type shield machine. 2. A pipe joint device (20b) for a mud discharge pipe in the mud discharge type shield machine according to claim 1,
The guide means (45) is installed between the outer peripheral surface of the joint inner cylinder (27) and the inner peripheral surface of the joint outer cylinder (28). Pipe fitting device for pipes. 3. A pipe joint device (20a) for a mud discharge pipe in the muddy water discharge type shield machine according to claim 1,
The guide means (29) is fixed to the rear body (1b) and is installed in the extending direction of the joint inner cylinder (27) from the rear body (1b). Pipe fitting device for sludge pipe. 4. A pipe joint device (20b) for a mud discharge pipe in the muddy water discharge type shield machine according to claim 2,
An expansion / contraction regulating stopper (46) for restricting the expansion / contraction amount of the joint inner cylinder (27) and the joint outer cylinder (28) is provided in the joint outer cylinder (2).
8) A pipe joint device for a mud discharge pipe in a mud discharge type shield machine characterized by being installed inside. 5. A pipe joint device (20a) for a mud discharge pipe in the muddy water discharge type shield machine according to claim 1,
Expansion and contraction restriction stoppers (31a, 31) for restricting the amount of expansion or contraction of the joint inner cylinder (27) and the joint outer cylinder (28).
At least one of b) is installed in the guide means (29). A pipe joint device for a mud discharge pipe in a mud discharge type shield machine. 6. The pipe coupling device (20a, 20b) for a mud discharge pipe in a muddy water discharge type shield machine according to claim 1, wherein the mud pipe (1) fixed to the rear body (1b).
1, 12) each joint inner cylinder (27) that expands and contracts inside each joint outer cylinder (28), and a coupling plate (32) that couples the joint inner cylinders (27) to each other. Pipe fitting device for pipes. 7. A mud discharge earth shield machine having a shield body (1) composed of a front body (1a) and a rear body (1b), wherein a mud pipe fixed to the front body (1a) ( 11)
And the mud pipe (12), the mud pipe (11) and the mud pipe (12) fixed to the rear body (1b), and the mud pipe (11) and the mud pipe (12). The pipe joint device (20c) connected to each other, and the pipe joint device (2c
0c) comprises a flexible pipe (30) connected to each end of the mud pipe (11) and the mud pipe (12). Pipe fitting device. 8. A pipe joint device (20c) for a mud discharge pipe in the mud discharge type shield excavator according to claim 7,
The pipe joint device (20c) is installed outside the outer circumference of the flexible pipe (30), and is fixed to each end of the mud pipe (11) and the mud pipe (12). ), Each mud pipe end plate (33), and the mud pipe end plate (34) are connected via a universal joint, so as to regulate the expansion amount of the flexible pipe (30) (36). A pipe joint device for a mud discharge pipe in a mud discharge type shield machine. 9. A pipe joint device (20c) for a mud discharge pipe in the muddy water discharge type shield machine according to claim 8,
The universal joint (35) includes both ends of a connecting rod (37) installed on an outer peripheral portion of the flexible pipe (30) and the mud pipe (11).
And a spherical joint (35) installed between the connection plate (32) fixed to each end of the sludge pipe (12) and each mud pipe end plate (33) and sludge pipe end plate (34). A pipe joint device for a mud discharge pipe in a mud discharge type shield machine. 10. A pipe joint device (20c) for a mud discharge pipe according to claim 7, wherein the pipe joint device (20c) is the mud pipe (11) and the mud pipe. Connection plate (32) fixed to each end of (12), each mud pipe end plate (33), and mud pipe end plate (3)
4) and a contraction regulation means (38) for regulating the contraction amount of the flexible tube (30), which is a pipe for a mud discharge pipe in a mud drainage shield machine. Coupling device. 11. A pipe joint device (20c) for a mud discharge pipe in a mud discharge type shield excavator according to claim 10, wherein the contraction restricting means (38) is a collar that covers the outer circumference of the flexible pipe (30). (38a) A pipe joint device for a mud discharge pipe in a mud discharge type shield machine. 12. The pipe joint device (20c) for a mud discharge pipe according to claim 7, wherein a rear body (1b) for connecting the flexible pipe (30).
In place of the mud pipe (11) and the mud pipe (12) fixed to the rear of the pipe coupling device (20a, 20b) for the mud pipe in the mud discharge earth shield machine according to claim 1. Mud pipe (11) and mud pipe (1) fixed to the body (1b)
A pipe joint device for a mud discharge pipe in a mud drainage shield machine, characterized by connecting a joint outer cylinder (28) or a joint inner cylinder (27) that expands and contracts with respect to 2).