JP3244900B2 - Telescopic tube and sediment discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic pipe and a sediment discharging device, and is useful for, for example, an excavated sediment pumping device in earth pressure shielding work, and a mud feeding or mud discharging device in muddy water shield work. is there.

[0002]

2. Description of the Related Art In recent years, as a method of transferring excavated earth and sand outside a pit in earth pressure system shield construction, instead of a scrap steel car,
Due to its excellent characteristics such as construction safety, construction efficiency, cleanliness in the site, and the possibility of construction even when the shaft is narrow, the adoption of pipeline pumping systems using hydraulically driven and piston type pumps is increasing. I have.

An example of the configuration of a conventional pipeline pumping system will be described with reference to FIGS. FIG. 8 shows an entire configuration of a conventional pipeline pumping system, FIG. 9 shows a configuration of the conventional snake type telescopic tube viewed from the top in a state of being extended to the longest, and FIG. The configuration is shown from the side, with the tube shortened to a minimum.

In FIG. 8, reference numeral 100 denotes a shield machine,
101 is a screw conveyor, 102 is a face pump, 103 is a pumping line, 104 is a relay pump.
05 is a discharge-side pressure-feeding pipeline of the relay pressure-feed pump, 106 is a snake-type telescopic tube, 107 is a pressure-feeding pipeline, 108 is a shaft, 1
Reference numeral 09 denotes a soil and sand receiving hopper, and 110 denotes a rail. The earth and sand excavated by the shield machine 100 is discharged from the shield machine 100 by the screw conveyor 101, and is pumped by the face pumping pump 102 to the pumping line 103.
Through the hopper 104a of the relay pressure pump 104. The sediment pumped from the relay pump 104 is supplied to the pumping line 105, the telescopic tube 106, and the pumping line 1.
07, the water is fed to the earth and sand receiving hopper 109 on the ground outside the shaft 108.

In the pipeline pumping system shown in FIG. 8, the devices 100, 101, 102, 103 and 104 from the shield machine 100 to the relay pump 104 move forward in the tunnel as the shield machine 100 excavates. I do. On the other hand, the lengths of the pressure feed pipes 105 and 107 between the relay pressure feed pump 104 and the earth and sand receiving hopper 109 must be extended as the shield machine 100 excavates. Therefore, the snake type telescopic tube 10
6 is mounted. That is, as the telescopic tube 106 extends forward in the tunnel with the excavation of the shield machine 100, continuous excavation is enabled, and after excavation for the length of the extension pipeline is completed, Pumping line 10 at end
7, the telescopic tube 106 is contracted forward, an extension pipe is inserted and connected to the space created by this, and then excavation is performed again. By repeating this operation, the pressure feed pipe 107 is extended in the tunnel.

Next, an example of the structure of the conventional telescopic tube 106 will be described. This compression pipe 106 is composed of eight U-shaped pipes 111 to 118 as shown in FIGS. 9 and 10, and between each of the U-shaped pipes, one end of one of the U-shaped pipes is formed. The other end of the U-shaped pipe is rotatably connected to a plane perpendicular to the pipe axis direction at the end face as a rotation plane. However, the U-shaped pipes 111 to 118 are alternately arranged with their ends rightward and leftward, and the rotation surface is orthogonal to the horizontal plane. Also,
Out of these U-shaped pipes 111 to 118, every third U-shaped pipe 113, 116 has an intermediate pipe portion that is larger than the other U-shaped pipes 111, 112, 114, 115, 117, 118. The postures are short and fixed independently of each other.

More specifically, a rail 11 in a tunnel
0, the front pumping line 105 and the joint 14
An elbow-shaped pressure-feeding pipeline 131 connected by 1 is fixed in a constant posture with one end directed toward the excavation direction and the other end directed rightward with respect to the excavation direction. The right-hand end of the elbow-shaped pressure feed pipe 131 is rotatably connected to one end of a long left-hand U-shaped pipe 111 by a joint 151, and the U-shaped pipe 111 is connected to the joint 151.
It is fixed to the bogie 121 by bearings 161 in the vicinity,
It is rotatable in a plane perpendicular to the illustrated Y direction (horizontal direction) on a horizontal plane. The other end of the U-shaped pipe 111 is rotatably connected to one end of a similarly long U-shaped pipe 112 facing right by a joint 152, and the U-shaped pipe 112 is near the other end. With bearing 162
And is rotatable in a plane perpendicular to the Y direction in the figure. This U-shaped pipe 11
The other end of 2 is rotatably connected by a joint 153 to one end of a short U-shaped channel 113 facing left fixed to a second carriage 122 in a fixed posture. Further, the other end of the short U-shaped pipe 113 is rotatably connected to one end of a long U-shaped pipe 114 facing right by a joint 154, and the U-shaped pipe 114 is connected to the joint 1.
In the vicinity of 54, it is fixed on the carriage 122 by a bearing 163, and is rotatable in a plane perpendicular to the Y direction in the figure. Similarly, the other end of the U-shaped pipe 114 is connected to one end of the similarly long U-shaped pipe 115 facing left and the joint 15.
5 and rotatably connected by the U-shaped pipe 1
15 is a third carriage 12 near the other end by a bearing 164.
3 and is rotatable in a plane perpendicular to the Y direction in the figure. The other end of the U-shaped pipe 115 is
It is rotatably connected by a joint 156 to one end of a short right U-shaped channel 116 fixed in a fixed posture on a third carriage 123. Further, the other end of the short U-shaped pipe 116 is rotatably connected to one end of a long U-shaped pipe 117 facing left by a joint 157, and the U-shaped pipe 117 is near the joint 157. It is fixed on the carriage 123 by a bearing 165 and is rotatable in a plane perpendicular to the Y direction in the figure. Also, the other end of the U-shaped pipe 117 is the same long U-shaped pipe 1
18 is rotatably connected to one end of the vehicle 18 by a joint 158, and the U-shaped pipe 118 is fixed on the last bogie 124 by a bearing 167 near the other end,
It is rotatable in a plane perpendicular to the Y direction in the figure. The other end of the U-shaped pipe 118 is connected to an elbow-shaped pressure feeding pipe 132.
Is rotatably connected to one end of the joint by a joint 159. This elbow-shaped pumping line 132 is the last bogie 1
The other end is connected to the rear pressure feed line 107 by a joint 142.

[0008] An example of the structure of the connection portion by the joints 151 to 159 will be described with reference to FIGS. In FIG.
Reference numeral 94 denotes each end of the U-shaped pipe or the elbow-shaped pressure feeding pipe. A flange 95 is provided on an end surface of each end 94, and the outer cylindrical surface of the flange 95 is sealed with a rubber packing 96. I have.
Reference numeral 90 denotes a joint body.
Is divided into two. When connecting, face each other 2
As shown in FIG. 7A, the two ends 94 and 94 are butted to each other, and the rubber packing 96 is attached to the outer cylindrical surface of the flange 95. The ends 94 are connected by wrapping them with 91 and 92 and connecting them with bolts and nuts 93.

[0009]

As can be seen from FIGS. 9 and 10, the conventional telescoping tube 106 described above has a space between bogies, for example, between the second bogie 122 and the third bogie 123. The two U-shaped pipes 114 and 115 are rotatably connected in a plane perpendicular to the Y direction (left and right directions) on the horizontal plane in the drawing, so that the distance between the bogies is free, that is, in the X direction in the drawing. Can be moved. However, there is no degree of freedom in the illustrated Y direction. Therefore, when the tunnel to be excavated curves, there is a problem of interference between the inner wall of the tunnel and another construction machine or the like moving in the tunnel when passing through the curved portion. In particular, if the radius of curvature of the curve is small, in some cases, other construction machines moving in the tunnel may not be able to pass the installation location of the telescopic tube 106, or may be connected to the pumping tubes 131, 134. If this is the case, the telescopic tube 106 cannot pass through the curved portion. For this reason, the construction was time-consuming, such as giving up the use of the pipeline pumping system from the beginning of the excavation, or using the pipeline pumping system again after passing through the curve portion without using the pipeline pumping system at the curved portion. SUMMARY OF THE INVENTION An object of the present invention is to provide a telescopic tube and a sediment discharging device that can solve the above-mentioned problems of the related art.

[0010]

The telescopic tube according to the present invention for achieving the above object has a plurality of U-shaped conduits, and is provided with one end of one U-shaped conduit. The end of another U-shaped pipe is rotatably connected with the plane perpendicular to the pipe axis direction at the end face as a rotation surface, and each U-shaped pipe alternately faces the end upward and downward That the rotating surface is substantially horizontal, the U-shaped pipe whose end is upwardly supported is independently rotatably supported on the carriage in a horizontal plane, and the end is downwardly directed. U-shaped conduit in is divided by the horizontal pipe portion, and the divided portions to each other is rotatably connected within a plane perpendicular to the tube axis direction of the horizontal pipe portion, the end portion upward U-shaped tube Departure from the road
It is characterized in that it is configured to absorb the generated relative angle difference between the rotating surfaces . Another telescopic tube of the present invention includes a plurality of U-shaped U-shaped conduits, and an end of one U-shaped conduit and an end of another U-shaped conduit are provided. It is rotatably connected with a plane perpendicular to the pipe axis direction at the end face as a rotation plane, and each U-shaped pipe is alternately arranged with the ends facing upward and downward, and the rotation plane is substantially horizontal. That is, the U-shaped pipe whose end is downward is independently supported rotatably on the carriage in a horizontal plane, the U-shaped pipe whose end is upward is divided by a horizontal pipe, and The divided parts are connected rotatably in a plane perpendicular to the pipe axis direction of the horizontal pipe part, and the end part faces downward
The relative angle difference between the rotating surfaces generated between the U-shaped pipe and
It is characterized in that it is configured to absorb . Still another telescopic pipe according to the present invention is characterized in that a gas vent valve is provided in a U-shaped pipe whose end is downward.

On the other hand, the earth and sand discharging device of the present invention that achieves the above object has a telescopic pump described above, a pump for receiving and pumping the earth and sand, and an end of the telescopic tube for communicating the sediment from the pump. A front pumping line for transporting to the telescopic tube, a rear pumping line communicating with the other end of the telescopic tube, and transporting earth and sand from the telescopic tube to the relay pump, and a truck carrying the telescopic tube. It is characterized by the following.

[0012]

According to the above construction, both ends of a plurality of U-shaped pipes are rotatably connected on a plane perpendicular to the pipe axis direction at the end faces, and further, the rotation surfaces are substantially horizontal. U-shaped pipes are connected alternately, facing upward and downward, and the ends are upwards, that is, only the U-shaped pipes located below the connection part, or conversely, the ends are downwards That is, since only the U-shaped pipes located on the upper side of the connecting portion are independently supported rotatably in a horizontal plane by, for example, a bogie, all the U-shaped pipes are together with, for example, the bogie supporting the same. Relative movement becomes possible on the horizontal plane. In other words, the entire pipe can expand and contract in the axial direction, and can move along an arbitrary curvature. In addition, the U-shaped pipe that is not rotatably supported on a horizontal plane is divided by a horizontal pipe, and the divided parts are rotatably connected to each other on a plane perpendicular to the axial direction of the horizontal pipe. Therefore, for example, if the laying accuracy of the bogie traveling rail in the shield tunnel is poor and a step or inclination occurs between the rotation surfaces of the U-shaped pipe that is rotatably supported on the horizontal plane, The resulting relative angle difference can be absorbed by the relative rotation between the divided parts.

[0013] Further, by providing the gas vent valve in the U-shaped pipe whose end is located downward, that is, above the connection portion, unnecessary gas in the telescopic tube can be appropriately removed. For example, in sediment discharge during shield construction, efficient operation can be performed because gas in the pipeline that causes backflow of sediment at the beginning of operation of the sediment discharge device or when refilling the pumping pipeline can be removed. Can be.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows a configuration of a telescopic tube according to an embodiment of the present invention as viewed from a side surface, and FIG. 2 shows a configuration of the telescopic tube as viewed from above in an extended state.
FIG. 4 shows a contracted state of the telescopic tube as viewed from above, and FIG. 4 shows a state of the telescopic tube as viewed from above the curve. FIG. 6 shows an overall configuration of a shield tunnel excavator using a sediment discharge device according to one embodiment of the present invention, and FIG. 5 shows a configuration of a telescopic tube according to another embodiment of the present invention viewed from the side. It is shown.

In the telescopic tube shown in FIGS. 1 to 4, nine U-shaped pipes (U-shaped pipes) 1 to 9 of the same shape are successively connected by joints 11 to 18, and An end of one U-shaped pipe and an end of another adjacent U-shaped pipe are rotatably connected with a plane perpendicular to the pipe axis direction at the end face as a rotation plane. However, the U-shaped pipes 1 to 9 are arranged and connected so that the ends are alternately directed upward and downward so that the rotation surface is substantially horizontal. In this embodiment, the upward U-shaped conduits are indicated by 2, 4, 6, and 8, and the downward U-shaped conduits are indicated by 1, 3, 5, 7, and 9. Each of the upwardly-facing U-shaped pipes 2, 4, 6, and 8 located below the joints 11 to 18 can be rotated in a horizontal plane by the shafts 21 to 24 at the horizontal pipe portion, preferably at substantially the center thereof. It is supported by. These shafts 21
24 are six trolleys 31 capable of traveling on rails 80
It is installed on the second to fifth bogies 32 to 35 from the top among the bogies 36 to 36. A stopper 37 is provided on each of the carts 32 to 35 so as to regulate the maximum rotation angle of the U-shaped pipes 2, 4, 6, and 8. The carts 31 to 36 are not directly connected to each other, and can travel independently. Each truck is provided with a cushioning material 38 to prevent the trucks from violently colliding with each other. On the other hand, the downward U-shaped pipes 1, 3, 5, 7, 9 located above the joints 11 to 18 are preferably divided into two elbows at substantially the center of the horizontal pipe part, and divided. The portions are rotatably connected by joints 41 to 45 on a plane perpendicular to the tube axis direction of the horizontal tube portion. A ball valve is provided in each of the downward U-shaped pipes 1, 3, 5, 7, and 9 as a gas vent valve 40 at an upper position of the pipes.

More specifically, an elbow-shaped pipe 52 connected to the front pressure-feeding pipe 73 by a joint 51 is formed on the leading bogie 31 on the rail 80 with one end thereof directed forward.
The other end is vertically fixed upward and fixed in a fixed posture. A joint 46 is connected to the other end of the elbow pipe 52.
As a result, one end of the U-shaped pipe line 1 facing downward in the vertical direction is rotatably connected to a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. The U-shaped pipe 1 is divided into two parts at the center, and the two elbow-shaped pipes 1a and 1b are connected by a joint 41 so as to be rotatable in a plane (substantially vertical) perpendicular to the pipe axis direction at the end face. It has become something. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe 1. At the other end of the downward U-shaped pipe 1, one end of the vertically upward U-shaped pipe 2 is rotated by a joint 11 on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. Connected as possible. A shaft 21 is provided downward substantially at the center of the U-shaped pipe 2 on the back side, and the shaft 21 is placed vertically on the second bogie 32 so that the U-shaped pipe 2 can rotate substantially on the water surface. It is supported on the carriage 32 so as to be rotatable about an axis. A stopper 37 is provided on the carriage 32 for regulating the maximum rotation angle. Further, a cushioning member 38 is also provided. Further, the other end of the upward U-shaped pipe 2 is connected to one end of the vertically downward U-shaped pipe 3 by a joint 12 by a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. This U-shaped pipe 3 is divided into two at the center,
The two elbow-shaped conduits 3a and 3b are connected by a joint 42 so as to be rotatable on a plane (substantially vertical) perpendicular to the pipe axis direction at the end face. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe 3. 38 is a cushioning material. Similarly, the other end of the downward U-shaped pipe 3 is connected to one end of the vertically upward U-shaped pipe 4 by a joint 13 by a plane perpendicular to the pipe axis direction at the end face (substantially horizontal plane). ) Is connected rotatably. A shaft 22 is provided downward at substantially the center on the back side of the U-shaped pipe 4 so that the U-shaped pipe 4
The shaft 22 is supported on the third bogie 33 so as to be rotatable vertically about the third bogie 33 so as to be rotatable substantially horizontally. A stopper 37 for regulating the maximum rotation angle is also provided on the carriage 33. 38 is a cushioning material. Further, the other end of the upward U-shaped pipe 4 is connected to one end of the vertically downward U-shaped pipe 5 by a joint 14 by a surface (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. This U-shaped pipe 5 is divided into two at the center,
The two elbow-shaped pipes 5a, 5b are connected by a joint 43 so as to be rotatable on a plane (substantially vertical) perpendicular to the pipe axis direction at the end face. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe 5. At the other end of the downward U-shaped pipe 5, one end of the vertically upward U-shaped pipe 6 is rotated by a joint 15 in a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. Connected as possible. A shaft 23 is provided downward at substantially the center on the back side of the U-shaped pipe 6, and the shaft 23 is vertically positioned on a fourth bogie 34 so that the U-shaped pipe 6 can rotate substantially on the water surface. It is supported by the carriage 34 so as to be rotatable around. A stopper 37 for regulating the maximum rotation angle is also provided on the carriage 34. Further, one end of the vertically downward U-shaped pipe 7 is connected to the other end of the upward U-shaped pipe 6 by a joint 16 at a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. The U-shaped conduit 7 is divided into two at the center, and the two elbow-shaped conduits 7a and 7b can be rotated by a joint 44 on a plane (substantially vertical) perpendicular to the pipe axis direction at the end face. It is connected. Further, a gas vent valve 40 is provided on the back side of the downward U-shaped pipe 7. The other end of the downward U-shaped pipe 7 is provided with a joint 17.
As a result, one end of the U-shaped pipe 8 which is upward in the vertical direction is rotatably connected to a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. A shaft 24 is provided substantially at the center on the back side of the U-shaped pipe 8.
The shaft 24 is supported on the fifth bogie 35 so as to be rotatable vertically around the fifth bogie 35 so that the U-shaped pipe 8 is rotatable substantially on the water surface. A stopper 37 for regulating the maximum rotation angle is also provided on the carriage 35. Further, the other end of the upward U-shaped pipe 8 is connected to one end of the vertically downward U-shaped pipe 9 by a joint 18 by a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. The U-shaped pipe 9 is divided into two parts at the center, and the two elbow-shaped pipes 9a and 9b are rotatably connected by a joint 45 on a plane perpendicular to the pipe axis direction at the end face (substantially vertical plane). It has become something. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe 9. The other end of the downward U-shaped pipe 9 is rotated by a joint 47 with respect to the vertically upward one end of the elbow pipe 53 in a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. Connected as possible. The elbow-shaped conduit 53 is fixed on the trailing bogie 36 in a constant posture with its other end directed rearward. The other end of the elbow pipe 53 is connected to a rear pressure feed pipe 75 by a joint 54.

The operation of the above-described telescopic tube will be described with reference to FIGS. In this telescopic tube, the carts 31,
The lower U-shaped pipes 2, 4, 6, 8 arranged on the intermediate carts 32 to 35 except for 36 with the support of the shafts 21 to 24 are rotatable in a horizontal plane. The upper U-shaped pipes 1, 3, 5, 7, 9 communicating with the lower U-shaped pipes 2, 4, 6, 8 are the lower U-shaped pipes 2, 4, 6,
As shown in FIGS. 2 and 3, the entire length of the telescopic tube can be freely expanded and contracted because it is connected to the movable member 8 so as to be relatively movable on a horizontal plane. In addition, since each of the U-shaped pipes 1 to 9 can move relative to each other on a horizontal plane, each truck 3
It is possible to freely move between 1 and 36, as shown in FIG.
Since it has a degree of freedom in the Y direction in addition to the direction, it is possible to turn along the curvature without any problem even in a curved portion as shown in FIG. Further, the upper U-shaped conduits 1, 3,
5, 7 and 9 are each divided by a horizontal pipe section, and two elbow pipes 1a and 1b, 3a and 3b, 5a and 5b, 7a and 7
Since b, 9a, and 9b are rotatably connected by joints 41 to 45 at the end face in a plane perpendicular to the tube axis direction, the following operation and effect are obtained. That is, when the rails 80 are arranged in a shield tunnel, the rails are generally laid with extremely low accuracy, and it is common that a step or an inclination is generated. Come. In this case, twisting occurs in the joints 11 to 18 between the upper and lower U-shaped pipes, and the relative movement is hindered by the joints 11 to 18 due to excessive force. ,
Joints 4 in upper U-shaped conduits 1, 3, 5, 7, 9
With the degree of freedom of 1 to 45, the displacement between the ends of the upper and lower U-shaped pipes can be absorbed, and therefore, even if the rail laying accuracy is poor, a smooth expansion and contraction operation becomes possible.

In the telescopic tube according to the embodiment described above, the U-shaped pipe 2, which is located below the joints 11 to 18, that is, upwards.
4, 6, and 8 are rotatably supported on a horizontal plane by rotating shafts 21 to 24 provided on independent carriages 32 to 35 on rails 80. However, as shown in FIG. Even if each of the U-shaped pipes 1 to 7 is installed, the same operation and effect can be obtained. That is, the telescopic tube shown in FIG.
7 are successively communicated by joints 11 to 16, and the end of one U-shaped pipe and the end of another adjacent U-shaped pipe are connected to the pipe axis direction at the end face. The right-angled surface is rotatably connected as a rotation surface. However, the U-shaped pipes 1 to 7 are arranged and connected so that the ends thereof are alternately directed upward and downward so that the rotation surface is substantially horizontal. In this embodiment, the upward U-shaped pipe is 1, 3,
5 and 7, and the downward U-shaped pipe is 2,
4 and 6. And joints 11-16
Each downward U-shaped pipeline 2, 4, which is located above
6 at its horizontal tube section, preferably at about its center,
23, it is supported rotatably in a horizontal plane. These shafts 21 to 23 are the second to fourth bogies 32 to 4 from the top among the five bogies 31 to 35 that can travel on the rail 80.
34. A stopper 37 is provided on each of the carts 32 to 34 so as to regulate the maximum rotation angle of the U-shaped pipes 2, 4, and 6. In addition, each trolley 31-3
The five are not directly connected to each other and can run independently. Each truck is provided with a cushioning material 38 to prevent the trucks from violently colliding with each other. On the other hand, the upward U-shaped pipes 1, 3, 5, and 7, which are located below the joints 11 to 16, are preferably divided into two elbows at substantially the center of the horizontal pipe part, The members are rotatably connected to each other by joints 41 to 44 at a plane perpendicular to the tube axis direction of the horizontal tube portion. A ball valve is provided in each of the downward U-shaped pipes 2, 4, and 6 as a gas vent valve 40 at an upper position of each of the pipes.

More specifically, as shown in FIG. 5, an elbow-shaped pipe 52 connected to a front pressure-feeding pipe 73 by a joint 51 is provided on a leading bogie 31 on a rail 80, It is fixed in a fixed posture with the other end facing downward in the vertical direction. One end of the vertical U-shaped pipe 1 is connected to the other end of the elbow pipe 52 by a joint 46 so as to be rotatable on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. It is. The U-shaped pipe 1 is divided into two parts at the center, and two elbow-shaped pipes 1a and 1b are provided.
Are rotatably connected in a plane (substantially vertical plane) perpendicular to the tube axis direction at the end face. At the other end of the upward U-shaped pipe 1, one end of the vertically downward U-shaped pipe 2 is rotated by a joint 11 on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. Connected as possible. A shaft 21 is provided downward at substantially the center on the opposite back side of the U-shaped pipe 2,
The shaft 21 is formed so that the U-shaped pipe 2 can rotate substantially on the water surface.
Can be rotated vertically around the second bogie 32.
2 is supported. A stopper 37 is provided on the carriage 32 for regulating the maximum rotation angle. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe line 2.
38 is a cushioning material. Furthermore, this downward U-shaped pipe 2
Is connected to one end of the U-shaped pipe 3 which is vertically upward by a joint 12 so as to be rotatable on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. This U-shaped pipe 3 is divided into two at the center, and two elbow-shaped pipes 3
a and 3b are connected by a joint 42 so as to be rotatable on a plane (substantially vertical) perpendicular to the tube axis direction at the end face. At the other end of the upward U-shaped pipe 3, one end of the vertically downward U-shaped pipe 4 is rotated by a joint 13 on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. Connected as possible. The shaft 22 is provided downward at substantially the center of the U-shaped pipe 4 on the opposite back side, and the shaft 22 is placed on the third bogie 33 so that the U-shaped pipe 4 can rotate substantially on the water surface. It is supported by the carriage 33 so as to be rotatable about the vertical. Trolley 3
A stopper 37 is provided on 3 for regulating the maximum rotation angle. Further, a gas vent valve 40 is provided on the back side of the downward U-shaped pipe 4. Further, the other end of the downward U-shaped pipe 4 is connected to one end of the vertically upward U-shaped pipe 5 by a joint 14 by a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. The U-shaped pipe 5 is divided into two parts at the center, and the two elbow-shaped pipes 5a and 5b are rotatably connected by a joint 43 in a plane perpendicular to the pipe axis direction at the end face (substantially vertical plane). It has become something. At the other end of the upward U-shaped pipe 5,
One end of the vertical U-shaped pipe 6 is connected rotatably by a joint 15 on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. A shaft 23 is provided downward substantially at the center on the opposite back side of the U-shaped pipe 6, and the shaft 23 is moved to a fourth bogie 34 so that the U-shaped pipe 6 can rotate substantially on the water surface.
It is supported on the carriage 34 so that it can rotate vertically.
A stopper 37 is provided on the carriage 34 for regulating the maximum rotation angle. A gas vent valve 40 is provided on the back side of the downward U-shaped pipe 6. Further, the other end of the downward U-shaped pipe 6 is connected to one end of the vertically upward U-shaped pipe 7 by a joint 16 by a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. And rotatably connected. The U-shaped pipe 7 is divided into two parts at the center, and the two elbow-shaped pipes 7a and 7b are rotatably connected by a joint 44 on a plane perpendicular to the pipe axis direction at the end face (substantially vertical plane). It has become something. The other end of the upward U-shaped pipe 7 is
The joint 45 is rotatably connected to one vertically downward end of the elbow-shaped pipe 53 on a plane (substantially horizontal plane) perpendicular to the pipe axis direction at the end face. The elbow-shaped conduit 53 is fixed on the trailing bogie 35 in a constant posture with the other end directed rearward. The elbow pipe 53 is connected to a rear pumping pipe 75 by a joint 54.

Various joints can be used as the joint used in each of the above embodiments. An example of the structure of the joint by the joint will be described again with reference to FIGS. 7, reference numeral 94 denotes each end of a U-shaped pipe or an elbow-shaped pressure-feeding pipe. A flange 95 is provided on an end surface of each end 94, and an outer cylindrical surface of the flange 95 is a rubber packing 96. Sealed with. Reference numeral 90 denotes a joint body, and the joint body 90 is divided into two parts. At the time of connection, the two facing end portions 94, 94 are connected to each other as shown in FIG.
When the rubber packing 96 is attached to the outer cylindrical surface of the flange 95, the rubber packing 96
And the flange 95 are divided into two parts 91 and 92 of the joint body 90.
By wrapping with and joining with bolt nut 93,
The ends 94 are connected.

Next, an embodiment of the earth and sand discharging device shown in FIG. 6 will be described. 6, reference numeral 74 denotes a telescopic tube according to the present invention, and the telescopic tube of the embodiment described with reference to FIGS. 1 to 4 or the telescopic tube of the embodiment described with reference to FIG. 5 is used. Have been. The earth and sand discharging device of the embodiment shown in FIG. 6 is for excavating a shield tunnel. In addition to the above-mentioned telescopic tube 74, a face pumping pump 72, a front pumping line 73, a rear pumping line 75 and a rail. 80 are provided with carts 31 to 36.

In shield tunnel excavation, earth and sand are excavated by a shield machine 70, and earth and sand are sent from a face by a screw conveyor 71 to a face pumping pump 72. The face pumping pump 72 receives and pressurizes the earth and sand, and transports the earth and sand through the front pumping line 73.
4 communicates further with the earth and sand, and further communicates with the telescopic pipe 74 through the rear pressure feed pipe 75 to transport the earth and sand to the relay pump 76 and put it into the hopper 76a. Relay pump 76
Pressurizes the conveyed earth and sand again, and sends it to the earth and sand receiving hopper 79 on the ground outside the shaft 78 through the pumping line 77.

The face pumping pump 72 is preferably an S-shaped pump for alternately driving two cylinders to pump the earth and sand, and may be suspended on the screw conveyor 71 or, in some cases, fixed to a dedicated carriage. May be. Although not shown, operating equipment of the shield machine 70 is provided and set on a dedicated carriage behind the face pumping pump 72.

The telescopic tube 74 communicates with the front pumping line 73 and the rear pumping line 75 as illustrated in FIGS. The telescopic tube 74 is mounted on the carts 31 to 36 as illustrated in FIGS. 1 to 5.

The discharge of earth and sand accompanying the excavation by the shield machine 70 may be performed, for example, as follows. At the initial stage of operation or at the time of refilling of the pressure feed line, the gas vent valve 40 shown in FIGS. 1 to 5 is opened to remove gas in the pipeline that causes the backflow of earth and sand, and then the gas vent valve 40 is closed. . Thereby, operation can be performed efficiently. As an extension of the pipe length required for excavation of the shield machine 70, the excavation pipe 74 extends forward in the tunnel with the excavation of the shield machine 70, thereby enabling continuous excavation. After the excavation is completed, the rear pumping line 75 is cut off at the rear end of the telescopic tube 74, the telescopic tube 74 is contracted forward, and the extension pipe is inserted and connected to the space generated thereby,
Then dig again. By repeating this operation, the pressure feed pipe is extended in the tunnel. In this case, as for the telescopic tube 74 illustrated in FIGS. 1 to 4, the telescopic tube is disposed on the intermediate bogies 32 to 35 except for the bogies 31 and 36 at the front and rear ends by supporting the shafts 21 to 24. The lower U-shaped pipelines 2, 4, 6, and 8 are rotatable in a horizontal plane.
Upper U-shaped conduits 1, 3, communicating with 4, 6, 8
5, 7, 9 are connected to the lower U-shaped pipes 2, 4, 6, 8 so that they can move relative to each other on a horizontal plane. Therefore, as shown in FIGS. Can freely expand and contract. Further, since each of the U-shaped pipes 1 to 9 can move relative to each other on a horizontal plane, each of the carts 31 to 36 is provided on the horizontal plane.
Since it is possible to freely move between them and to have a degree of freedom in the Y direction in addition to the X direction shown in FIG. 2, it is possible to turn along the curvature without any problem even in a curved portion as shown in FIG. . Further, the upper U-shaped pipes 1, 3, 5, 7,
9 are each divided by a horizontal pipe section, and two elbow pipes 1
a and 1b, 3a and 3b, 5a and 5b, 7a and 7b, 9a
And 9b are connected by joints 41 to 45 so as to be rotatable at the end face in a plane perpendicular to the tube axis direction, and the following operational effects are obtained. That is, when the rail 80 is installed in a shield tunnel, it is generally laid very coarsely, and it is normal that a step or an inclination is generated. Therefore, even when each of the carts 31 to 36 is not on the same horizontal plane, there is a problem. Come. In this case, twisting occurs in the joints 11 to 18 between the upper and lower U-shaped pipes, and the relative movement is hindered by the joints 11 to 18 due to excessive force. , Joints 41 to 45 in upper U-shaped pipes 1, 3, 5, 7, 9
Due to the degree of freedom, the displacement between the ends of the upper and lower U-shaped pipes can be absorbed. Therefore, even when the rail laying accuracy is poor, a smooth expansion and contraction operation can be performed.

[0026]

As described above, according to the telescopic tube and the earth and sand discharging device of the present invention, the following effects can be obtained. Both ends of the plurality of U-shaped pipes are rotatably connected on a plane perpendicular to the pipe axis direction at the end face, and further, the U-shaped pipe is turned upward so that the rotation surface is substantially horizontal, It is arranged alternately and connected downward, and furthermore, only the U-shaped pipe whose end is located upward, that is, below the connection portion, or, conversely, the end is downward, that is, located above the connection portion. Since only the U-shaped pipes are independently rotatably supported in a horizontal plane by, for example, a bogie, all the U-shaped pipes can move relative to each other, for example, in a horizontal plane together with the bogie supporting the U-shaped pipes. In other words, the entire pipe can expand and contract in the axial direction, and can move along an arbitrary curvature. In addition, the U-shaped pipe, which is not rotatably supported on the horizontal plane, is divided by the horizontal pipe section, and the divided sections are rotatably connected to each other at a plane perpendicular to the axial direction of the horizontal pipe section. Therefore, for example, if the laying accuracy of the bogie traveling rail in the shield tunnel is poor and a step or inclination occurs between the rotation surfaces of the U-shaped pipe that is rotatably supported on the horizontal plane, The resulting relative angle difference can be absorbed by the relative rotation between the divided parts. Further, by providing the gas vent valve in the U-shaped pipe whose end is located downward, that is, above the connection portion, unnecessary gas in the telescopic tube can be appropriately removed. For example, in sediment discharge during shield construction, efficient operation can be performed because gas in the pipeline that causes backflow of sediment at the beginning of operation of the sediment discharge device or when refilling the pumping pipeline can be removed. Can be. From the above, it is easy to extend the pipeline with the excavation. Even in a tunnel having a curved portion with a small radius of curvature, the pumping method can be employed safely, efficiently, without impairing the cleanliness of the site, and with a minimum shaft space.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a telescopic tube according to an embodiment of the present invention as viewed from a side.

FIG. 2 is a diagram showing an extended state of the telescopic tube as viewed from above.

FIG. 3 is a view of a shortened state of the telescopic tube as viewed from above.

FIG. 4 is a view of a state in which the telescopic tube is curved as viewed from above.

FIG. 5 is a configuration diagram of a telescopic tube according to another embodiment of the present invention as viewed from the side.

FIG. 6 is an overall configuration diagram of a shield tunnel excavation device using the earth and sand discharging device according to one embodiment of the present invention.

FIG. 7 is a diagram showing a structural example of a joint.

FIG. 8 is an overall configuration diagram of a conventional pipeline pumping system.

FIG. 9 is a configuration view of a conventional snake type telescopic tube as viewed from above in an extended state.

FIG. 10 is a view of a shortened state of the snake-type telescopic tube as viewed from above.

[Explanation of symbols]

 1 to 9 U-shaped pipe 11 to 18, 41 to 47, 51, 54 Joint 21 to 24 Shaft 31 to 36 cart 37 Stopper 38 Buffer material 40 Gas release valve 52, 53 Elbow-shaped pipe 70 Shield machine 71 Screw conveyor 72 Face pumping pump 73 Front pumping line 74 Telescopic tube 75 Rear pumping line 76 Relay pump 77 Pumping line 78 Vertical shaft 79 Sediment receiving hopper 80 Rail

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Hanmei 6-16-1, Hinoshima Enoura-cho, Shimonoseki-shi, Yamaguchi Prefecture Inside Mitsubishi Heavy Industries, Ltd. Shimonoseki Shipyard (72) Inventor Hisashi Yamamoto 2-chome, Higashiyamatocho, Shimonoseki-shi, Yamaguchi Prefecture No. 16-1 Inside Shimonoseki Ryoshige Engineering Co., Ltd. (56) References JP-A-3-103596 (JP, A) JP-A-63-71291 (JP, U) JP-A-59-77686 (JP, U) Sho 60-66753 (JP, U) Actual opening Sho 59-80567 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 7/10

Claims (4)

(57) [Claims] 1. A pipe having a plurality of U-shaped U-shaped pipes, wherein the end of one U-shaped pipe and the end of another U-shaped pipe are end-faced pipes. The U-shaped pipes are alternately arranged with their ends facing upward and downward, and the rotating surfaces are substantially horizontal. The U-shaped pipe whose part is upward is independently supported rotatably in the horizontal plane on the bogie, the U-shaped pipe whose end is downward is divided by the horizontal pipe part, and The split sections are rotatably connected in a plane perpendicular to the pipe axis direction of the horizontal pipe section, and the end section is formed between the pipe section and the U-shaped pipe having an upward end.
A telescopic tube characterized in that it is configured to absorb a relative angle difference between generated rotating surfaces . 2. A pipe having a plurality of U-shaped pipes, wherein one U-shaped pipe end and another U-shaped pipe end face each other. The U-shaped pipes are alternately arranged with their ends facing upward and downward, and the rotating surfaces are substantially horizontal. The U-shaped pipe whose part is downward is independently supported rotatably in the horizontal plane on the bogie, the U-shaped pipe whose end is upward is divided by the horizontal pipe, and The split sections are rotatably connected in a plane perpendicular to the pipe axis direction of the horizontal pipe section, and the ends are formed between the pipe section and the downward facing U-shaped pipe.
A telescopic tube characterized in that it is configured to absorb a relative angle difference between generated rotating surfaces . 3. The telescopic tube according to claim 1, wherein a gas vent valve is provided in the U-shaped pipe whose end is downward. 4. A telescopic pump according to claim 1, 2 or 3, which communicates with a pump for receiving and pumping earth and sand, and one end of the telescopic pipe, and which forwards the earth and sand from the pump to the telescopic pipe. A sediment discharge comprising: a pumping pipeline, a rear pumping pipeline communicating with the other end of the telescopic tube and transporting earth and sand from the telescopic tube to a relay pump, and a bogie on which the telescopic tube is mounted. apparatus.