JPS63189593A - Method and device for renewing existing duct - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention] (Technical Field) The present invention relates to a method and apparatus for updating existing pipes such as water pipes and sewer pipes without using trenchless methods, and particularly relates to The present invention relates to a method and apparatus for renewing existing pipes by cleaning out the existing pipes buried in the area and laying new pipes there.

(Prior art) Renewal of aging pipes buried underground generally involves
A trench is excavated at the location where the pipe is buried using an excavation method to expose the existing pipe, and after removing the existing pipe, a new pipe is sunk in its place, and the excavated trench is backfilled. There is. However, in this construction method, a trench must be excavated, so if the area to be excavated is a road, the road must be closed to traffic.

As one of the devices for updating liquid pipes such as water pipes and sewage pipes without using the excavation method, the existing pipe is moved by the destroying machine from one end of the existing pipe to the other end. There is a device that destroys the existing pipe and pushes a new pipe with the same diameter as the existing pipe into the ruins of the destroyed existing pipe.

However, in this conventional device, the breaking machine is guided within the existing pipeline and moved along the existing pipeline,
In order to crush existing pipes, if the existing pipes are curved due to long-term use, the crusher is moved forward along the curved existing pipes, resulting in the laying of new curved pipes. .

In addition, in the conventional device described above, in order to discharge the fragments of the destroyed existing pipe using the undestructed existing pipe, a machine for receiving the fragments must be placed in the shaft where the destruction machine reaches. The equipment is large and expensive.

Furthermore, in the conventional apparatus described above, use of the conduit must be discontinued at the time of renewal, and therefore a detour must be laid in place of the existing conduit to be renewed.

(Object of the Invention) An object of the present invention is to provide a method and apparatus that can update existing pipelines without using the cut-and-cut method.

Another object of the present invention is to provide a renewal method and apparatus that can correctly lay a new pipe even if the existing pipe is curved.

Still another object of the present invention is to be able to discharge fragments of existing pipes without using the existing pipes to be shredded.
An object of the present invention is to provide a method and device for updating existing pipelines.

Still another object of the present invention is to provide a method and apparatus that allow existing pipelines to be updated without having to create detours for liquids flowing through the existing pipelines.

(Structure of the Invention) The renewal method of the present invention is a method of renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, and is a shield type method. A tunnel excavator is advanced from one end of the existing pipe to the other end, and while the excavator is moving forward, the excavator excavates earth and sand around the existing pipe while crushing the existing pipe, and It is characterized by placing new pipes in excavated locations.

The renewal method of the present invention is also a method of renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the inside of the existing pipe being sealed by sealing means. sealing the tunnel, disposing a shield type tunnel excavator behind the sealing means, moving the excavator forward along the existing pipe, and crushing the existing pipe with the excavator while the excavator is moving forward; The method is characterized in that earth and sand are excavated while excavating the earth and sand, the crushed material and the excavated material by the excavator are discharged to the rear of the excavator, and the new pipe is placed at the excavated location.

The renewal method of the present invention is further a method of renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the inside of the existing pipe being sealed by sealing means. a shield type tunnel excavator is disposed behind the sealing means, and the excavator is advanced along the existing pipe, and while the excavator is advanced, the flowing liquid flowing through the existing pipe is prevented from being blocked by the sealing means. and flowing the earth and sand through the excavator to the rear of the excavator, and excavating the earth and sand while crushing the existing pipe by the excavator, and discharging the crushed material and excavated material by the excavator to the rear of the excavator, The method is characterized in that the new pipe is placed at an excavated location.

The renewal device of the present invention is a device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the △ end of the existing pipe to be renewed. The present invention includes a shield type tunnel excavator that is moved from one end to the other end to excavate earth and sand around the new pipe while crushing the existing pipe, and means for arranging the new pipe at the excavated location.

The renewal device of the present invention is also a device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, and which is configured to seal the inside of the existing pipe. 5. a sealing means disposed within the existing pipe; a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means and excavates earth and sand while crushing the existing pipe; and (5) crushing by the excavator. The method includes means for discharging objects and excavated materials to the rear of the excavator, and means for arranging the new pipe at the location excavated by the excavator.

The renewal device of the present invention is a device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, and the equipment is configured to seal the inside of the existing pipe. a sealing means disposed within the existing pipe; and a sealing means moved along the existing pipe from behind the sealing means 11.
A shield type tunnel excavator that excavates the ground while destroying an existing pipe; a means for discharging crushed materials and excavated materials produced by the excavator to the rear of the excavator; and means for placing the newly installed pipe at the excavated location.

(Operations and Effects of the Invention) According to the present invention, in order to place a new pipe while crushing the existing pipe with a shield type tunnel excavator, it is necessary to excavate the area where the existing pipe to be replaced is laid using the cut-and-cover method. There is no.

Furthermore, according to the present invention, since the earth and sand around the existing pipeline to be renewed is also excavated by an excavator, an area wider than the cross-sectional area of the existing pipeline is excavated, and therefore the existing pipeline is not curved. By moving the excavator correctly, even when
New pipelines can be laid correctly.

Further, according to the present invention, since the existing pipe is crushed and the earth and sand around it is excavated while preventing the excavated material from flowing into the unbroken existing pipe by the sealing means, the debris of the existing pipe and the excavated material are removed. Sand does not get into the existing uncrushed pipes, so there is no need to install equipment to receive and discharge the excavated material in the shaft reaching the excavator, resulting in low cost.

According to the present invention, there is no need to discontinue use of the pipe line to be updated, so it is possible to update the pipe line without providing a detour.

(Example) Hereinafter, an example of the updating device of the present invention shown in the drawings will be described.

The renewal device 10 shown in FIG. 1 crushes an existing concrete pipe 12 for sewage buried underground from the downstream side, and lays a new concrete pipe 14 having a larger diameter than the existing pipe 12. Used for construction.

The renewal device 10 includes a shield-type tunnel excavator 20 that is advanced from a starting shaft 18 constructed in the ground 16 to an arrival shaft (not shown) constructed on the upstream side thereof, and an excavator that excavates a new pipe 14. A propulsion mechanism 22 pushes the excavator 20 into the excavation site by the excavator 20 and moves the excavator 20 forward, and excavated materials such as fragments of the existing pipe 12 and excavated sand by the excavator 20 are removed from the existing pipe 12.
In order to prevent the pipe from reaching the reaching shaft through the
2, a discharge mechanism 26 for discharging the excavated material to the ground, and a discharge mechanism 26 for discharging the excavated material to the ground, and a discharge mechanism 26 for discharging the excavated material to the ground, and draining the water in the existing pipe 12 through the seal mechanism 22 and the excavator 20 to the first stream side. and a temporary flow path mechanism 28 that allows the flow to flow into the pipe line 30.

Shield type tunnel excavator The shield type tunnel excavator 20 shown in FIGS. 2 to 6 includes first and second main body parts 34. which are butted against each other.
The shield body 32 includes a cylindrical shield body 32 having a diameter of 36.

As shown in FIGS. 2 and 3, the first main body portion 34 has a first cylindrical portion 34a that defines a bell-shaped crushing chamber, that is, a first space 38 whose inner diameter gradually decreases toward the rear. and a second cylindrical portion 34b that continues to the rear of the first space 38 and defines a muddy water chamber, that is, a second space 40 having a larger cross-sectional area than the first space. First and second cylindrical portions 34
a and 34b represent the rear end of the first cylindrical portion 34a and the second cylindrical portion 3.
4b and the front end thereof, they are separably butted and coupled to each other by a plurality of bolts. The inner diameter of the first space 38 may be approximately the same.

As shown in FIG. 3, grooves extending in the circumferential direction are formed on the outer periphery of the front end and the outer periphery of the rear end of the second cylindrical portion 36b. A plurality of surface bolts for separably connecting the first and second cylindrical portions 34a and 34b are disposed on a flange portion formed on the outer periphery of the front end by the groove in the front end portion of the first cylindrical portion 36a. ing. On the other hand, a flange portion formed on the outer periphery of the rear end portion by the groove in the rear end portion of the second cylindrical portion 36b has a plurality of bolts are placed.

As shown in FIGS. 3 and 4, an inward annular lattice 42 that partitions the first and second spaces 38, 40 is provided inside the rear end of the first cylindrical portion 34a. There is. The lattice 42 extends along the rear end surface of the first cylindrical portion 34a, and also allows small excavations to move from the first space 38 to the second space 40.
However, large excavated objects are allowed to move to the first space 3.
A plurality of openings 44 are spaced at equal angular intervals around the axis of the shield body 32 to prevent movement from the shield body 8 to the second space 40. The lattice 42 may be attached to the inner side of the surface end portion of the second cylindrical portion 34b. The second cylindrical portion 34b is provided with a partition wall 46 that partitions the inside of the shield body 32 into a front region and a rear region.

As shown in FIGS. 3 and 4, a cylindrical sleeve 48 that extends through the partition wall 46 in the axial direction of the shield body 32 is supported on the partition wall 46 in a non-slip and non-rotatable manner. On the side of the first cylindrical portion 34a of the partition wall 46, there is an internal gear 50 extending around the sleeve 48. It is fixed with JL number of bolts. A crankshaft 52 that passes through the sleeve 48 in the axial direction of the shield body 32 is rotatably supported by a plurality of bearings 54 in the sleeve 48 . The crankshaft 52 includes a shaft portion 52a supported by the sleeve 48 and an eccentric portion or shaft portion 52b extending forward from the shaft portion. The axis of the shaft portion 52a is aligned with the axis of the shield body 32. On the other hand, the axis of the shaft portion 52b is between the shield body 32 and the shaft portion 5.
It is eccentric by a distance 11ie from the axis of 2a, and
It is arranged in the first space 38.

As shown in FIG. 3, the shaft portion 52b has a first cylindrical portion 3.
A rotor 56, which together with 4a constitutes a crusher, is rotatably supported by a plurality of bearings 58. The rotor 5
6 has a conical shape with an outer surface whose diameter dimension gradually increases toward the rear end side, and is disposed within the first space 38 . The distance between the rear end outer surface of the rotor 56 and the rear end inner surface of the first cylindrical portion 34a is smaller than the size of the opening 44 of the lattice 42 in the diametrical direction of the shield body 32. Note that a plurality of protrusions or grooves extending in the circumferential direction may be provided on the inner surface of the first cylindrical portion 34a defining the first space 38 and on the outer surface of the rotor 36.

As shown in FIGS. 3 and 5, a cutter assembly 60 is fixed to the tip of the rotor 56. As shown in FIGS. The cutter assembly 60 includes a plurality of arms 62 extending from the rotor 56 in the radial direction of the shield body 32 and a plurality of cutter bits 64 fixed to the arms 62. Each cutter bit located at the most distal end of arm 62 has an inward tip pointing toward the center of rotation of cutter assembly 60 and an outward tip pointing in the opposite direction. On the other hand, each of the other cutter bits is arranged so that its tooth tips face toward the center of rotation of the cutter assembly 60, that is, inward, and its tooth tips are arranged on the outside of the cutter bit. It is arranged so that it is behind the tooth tip of the cutter bit. Note that each cutter bit may be arranged so that its tooth tips are located on the same plane orthogonal to the rotational axis of the cutter assembly 60.

As shown in FIGS. 3 and 4, an external gear 66 that meshes with the internal gear 50 is fixed to the rear end surface of the rotor 56 with a plurality of bolts. The gear 66 has a shaft portion 52 with respect to the shaft portion 52a of the crankshaft 52 with respect to the gear 50.
It is eccentric by the same distance ae as the eccentricity amount of b. Therefore, the gears 50, 66 mesh with each other at one diametrical position, and the area where the two mesh with each other moves around the sleeve 48 as the crankshaft 52 rotates, resulting in the rotor 56 and the cutter assembly. The solid body 60 rotates (revolutions) around the axis of the shield body 32 and the shaft portion 5
It performs rotational movement (rotation) around 2b.

As shown in FIG. 3, a mechanical seal 6 is provided between the rotor 56 and the internal gear 50 to liquid-tightly close the gap between the two.
8 is placed. The mechanical seal 68 includes an annular groove 70 provided on the rear end surface of the rotor 56 coaxially with the rotor 56, a cylindrical ring 72 fitted in the groove and having a substantially uniform outer diameter, and an inner ring 72 having a substantially uniform outer diameter. An annular bearing seat 74 is fixed to the front end surface of the gear 50 coaxially with the internal gear, and a plurality of springs 76 press the ring 72 toward the bearing seat 74.
Equipped with. The groove 70 opens on the internal gear 50 side.

The ring 72 includes an annular main body that is slidably received in the groove 70 in the axial direction of the shield body 32, and a protrusion that extends rearward from the outer periphery of the rear end of the main body coaxially with the main body. Be prepared. The main body portion and the surface protrusion portion of the ring 72 have the same diameter size, and are coaxial with the rotor 56, that is, eccentric with respect to the internal gear 50 by the distance @e.

Spring 76 is a compression coil spring and is disposed within a hole communicating with groove 70 .

outer diameter dimensions of the main body portion and the protruding portion of the ring 72;
In particular, the diameters of the rear end surface of the ring 72 and the front end surface of the seat 74, that is, the contact surface (sealing surface) between the ring 72 and the seat 74, are at least 2e smaller than the outer diameter of the seat 74. That is, the diameter of the contact surface (sealing surface) between the ring 72 and the seat 74 is equal to the diameter of the outer periphery of the rear end surface (projection) of the ring 72, and the diameter of the contact surface (sealing surface) between the ring 72 and the seat 74 is equal to If the diameter of the outer circumference is D2, then D, ≦D2-2e.

As shown in FIG. 3, the partition wall 46 has an annular oil chamber 78 surrounding the sleeve 48, and the oil chamber 78 contains fi'21 lubricating oil. The oil chamber 78 includes a plurality of grooves 80 bored in the partition wall 46 and an annular groove 8 formed on the outer periphery of the sleeve 48.
2 and a plurality of sixes 84 formed in the sleeve 48 to communicate with the space between the crankshaft 52 and the sleeve 48. Therefore, the space between the crankshaft 52 and the sleeve 48 and the gap between the partition wall 46 and the sleeve 48 are filled with lubricating oil.

The contact area between the front end surface of the rotor 56 and the tip of the crankshaft 52, the contact area between the rotor 56 and the ring 72, the contact area between the partition wall 46 and the internal gear 50, and the contact area between the sleeve 48 and the partition wall 46 are , O-rings for sealing are arranged respectively. In addition, the rear end of the sleeve 48 and the crankshaft 52
A sealing material 86 for preventing lubricating oil from flowing out is disposed between the rear end portion of the lubricating oil and the rear end portion of the lubricating oil. The sealing material 86 is fixed to the sleeve 48 with a plurality of bolts.

As shown in FIGS. 2 and 3, the second main body portion 36 is connected to the first cylindrical portion 3 connected to the rear end portion of the second cylindrical portion 34b.
6a, a second cylindrical portion 36b inserted into the rear end of the first cylindrical portion, and a third cylindrical portion 36c connected to the rear end of the second cylindrical portion.

The shield body 32 is attached to the front end surface of the first cylindrical portion 36a.
A support wall 88 is provided perpendicular to the I41 line, and has a hole 90 for receiving the rear end of the sleeve 48. The first cylindrical portion 36a and the second cylindrical portion 36b of the second main body portion 36 have a plurality of direction correction jacks 9.
They are interconnected by 2. Connectors 93.95 are arranged between the second cylindrical portion 36b and the third cylindrical portion 36c and between the third cylindrical portion 36c and the most recently installed pipe 14.

A drive mechanism 94 for rotating the crankshaft 52 is fixed to the rear part of the support wall 88 with a plurality of bolts. The drive mechanism 94 includes an electric motor and a speed reducer, and an output shaft 96 of the drive mechanism 94 is inserted into a hole provided at the rear end of the crankshaft 52. The output shaft 96 and the crankshaft 52 are non-rotatably coupled by a key 98.

As shown in FIG. 3, channels 100, 102, and 104 are formed in the crankshaft 52, the sleeve 48, and the partition wall 46 for guiding the sewage in the existing pipe 12 to the temporary channel mechanism 28. The flow path 100 opens at the tip of the crankshaft 52 and at the outer circumference. The flow path 102 includes an annular groove formed in the inner circumferential surface of the sleeve 54 and a hole that communicates the groove with the flow path 104 in order to receive the sewage from the flow path 100 and guide it to the flow path 104. Become. An annular mechanical seal 106 is disposed on both sides of the annular groove between the crankshaft 54 and the sleeve 48 to prevent leakage of sewage from the groove. A pair of O-rings are disposed between the sleeve 48 and the bulkhead 46 to prevent leakage of sewage from the connection of the flow passages 102, 104.

As shown in FIG. 3i and FIG. 5, the conical outer surface of the rotor 56 is designed to agitate the excavated material in the first space 38 as the rotor 56 rotates, making the excavated material fluid. A plurality of vanes 108 are attached that provide a.

Excavator and new pipe propulsion mechanism The propulsion mechanism 22, as shown in FIG. A slider 112 installed movably along a rail, and the slider 1
12. The jacks 11, 4 are walls 11 built in the shaft 38.
It is attached to 6.

The jack 114 is extended after the new pipe is placed between the preceding newly installed pipe 14 at the rear end and the slider 112. As a result, the slider 112 is moved forward, and the newly installed pipe 1
2 is pushed into the excavation site by the excavator 20, and the excavator 20
is advanced. When the jack 114 is extended a predetermined distance, the jack 114 is retracted, the slider 112 is pulled back, a new pipe is placed between the slider 112 and the new pipe 14 at the rear end, and then the jack 114 is extended. . The replenishment work of contracting the jack 114 to pull back the slider 112 and arranging a new pipe between the new pipe at the rear and the slider 112 is buried between the starting shaft and the reaching shaft of the excavator 20. This will be repeated multiple times until the renewal of the existing pipelines is completed.

Sewage Seal Mechanism As shown in FIGS. 7 and 8, the seal mechanism 24 includes:
It includes a main body 120 that is movable within the existing pipe lz. The main body 1
20 includes a cylindrical shaft 122 extending along the axis of the existing pipe 12 and a cylindrical frame 126 rotatably disposed around the shaft 122 by a plurality of bearings 124.

Shaft 122 is coupled to rotor 56 of excavator 20 by a coupling mechanism 128 shown in FIGS. 1 and 9. A pair of mechanical seals 130 are disposed between the shaft 122 and the frame 126, and lubricating oil is contained in the area where the bearing 124 is disposed.

A stirring head 132 is fixed to the tip of the shaft 122. The stirring head 132 includes a boss 134 fixed to the shaft 122 and a plurality of (six in the illustrated example) blades 134 fixed to the boss 134. The outer vanes 136 are arranged at equal angular intervals around the axis of the shaft 122 and are interconnected at their distal ends by means such as welding.

At the tip of the frame 126, there is a guide head 13 for smooth movement of the sealing device 24 within the existing pipe 12.
8 is installed. The guide head 138 has a boss 140 attached to the frame 126 with a plurality of bolts, and a plurality of guides 142 (six in the illustrated example) fixed to the boss 140. A plurality of plate-shaped guides 144 (six in the illustrated example) are provided on the outer periphery of the frame 126.
is installed. Each guide 142° 144 extends in the axial direction of the shaft 122 and
are spaced at equal angular intervals around the axis of Guy lower 1
The tips of 42 are interconnected by means such as welding. The tips of the guides 144 are also interconnected by means such as welding.

A tail cover 146 is attached to the f& end of the frame 126 with a plurality of bolts.
A spacer 150 including a plurality of disk-shaped seal members 148 is attached to the spacer 46 with a plurality of bolts.

Seal member 148 is comprised of an elastically deformable material such as rubber.

As shown in FIG. 9, the shaft 122 and the coupling mechanism 128
are connected by a flange joint 152. On the other hand, the coupling mechanism 128 and the rotor 56 are connected to the coupling mechanism 1
28 and the rotor 56 are connected by a universal joint 154 to allow relative bending. The universal joint 154 is
A sphere 156 provided in the connection mechanism 128 and a sphere 156
A pair of receivers interconnected by a plurality of bolts to rotatably receive the ball 156 and the receiver have seats 158, 159, and a pin 160 that engages the ball 156 and the seat 158.

The pin 160 passes through the seat 158 and the ball 15.
The receiver is inserted into hole 162 of No. 6. Hole 162 has a larger diameter dimension than pin 160. As a result, although the sphere 156 and the receiver seat 158 can be bent within a predetermined angular range, large relative rotations are prevented.

The receiver seat 158 is fixed to the tip of the rotor 56 with a plurality of bolts.

When the rotor 56 of the excavator 20 is rotated, the shaft 12
2 is rotated relative to frame 124.

With the pivoting motion of the rotor 56 and when the existing pipeline is curved, the sealing mechanism 24 is tilted relative to the excavator 20, but this analogy is accommodated by the free laf 154.

The hollow portion of the shaft 122 and the hollow portion of the coupling mechanism 128 constitute flow paths 164 and 166 that guide the sewage in the existing pipe 12 to the flow path 100 of the excavator 20.

Excavated material discharge mechanism As shown in FIGS. 1 and 6, the excavated material discharge mechanism 2
6 includes a pipe 170 that supplies muddy water for scraping discharge to the second space 40, and a pipe 172 that discharges the excavated material from the second space 40 together with the muddy water. One end of the pipe 170 is connected to the connector 1
It is connected to the support wall 88 through the partition wall 4.
6 in the axial direction of the shield body 32 through a flow path 178 (see FIG. 3).
It is connected to 0. One end of the tube 172 is also connected to the support wall 88 by a connector 180 as shown in FIG. It is communicated with the second space 4o via the second space 4o. The connectors 174, 180 are
It is fixed to the rear end surface of the support wall 88 with a plurality of bolts (not shown).

As shown in FIG. 1, pipe 170 communicates with water tank 184 via pipe 182, and pipe 172 communicates with settling tank 188 via pipe 186.

A water supply pump 190 and a plurality of valves 192 are arranged in the pipe 182, and a discharge pump 194 and a plurality of valves 196 are arranged in the pipe 186. The tubes 182, 186 are
A bendable and expandable tube is provided in the middle. The cross-sectional area of the hollow portion of the draining pipe 172° 186 is larger than the area of the opening 144 of the grid 42. The discharge L1 of the water supply pump 190 and the suction E1 of the discharge pump 194 are short-circuited by a short-circuit pipe 198, and a valve 200 is connected to the short-circuit pipe 198.
is located.

As shown in FIG. 3, a tube 1 is provided at the bottom of the second space 40.
A flow path for muddy water in the second space 40 is designed to prevent the muddy water supplied from the pipe 70 from reaching the pipe 172 directly, and to allow the muddy water to flow through the flow path surrounding the second space 40. A defining partition 202 is provided.

Pumps 190, 194 are operated when the excavator excavates. Thereby, the discharge mechanism 26 directs the muddy water in the tank 184 to the second space 40 of the excavator 20 through the pipes 182 and 170.
The slurry in the second chamber 40 is discharged together with the excavated material through pipes 172 and 186 to a settling tank 188. On the other hand, when adding new pipes, the pump 190
After the tubes 182, 186 are passed into the new tubes with the valves 194 shut off and certain valves closed, the valves 190 and 196 are opened and the pumps 190 and 196 are activated. A portion of the muddy water supplied to the second chamber 40 flows into the first chamber 38, but most of the muddy water is discharged to the settling tank 188 by the discharge mechanism 26.

Temporary flow path mechanism for sewage The temporary flow path mechanism 28, as shown in FIGS. Guide 212
A second guide 214 connected to the rear end that can be retracted and cleaned, a discharge pump 216 connected to the rear end of the second guide 214, and a drain pump 216 that discharges sewage downstream. The third guide 2 that guides the pipe 30 on the side of
18. The tip of the first guide 212 is connected to the support wall 88 by a connector 220 (see FIG. 3), and is also communicated with the flow path 104 of the excavator 20.

The first guide 212 has a valve 222 (see FIG. 2) located within the shield body 32. Third guide 21
8 is also provided with a valve 224. Third guide 2
The end of 18 opposite the discharge pump 216 is inserted into the existing pipe 30 with a seal member 226 disposed at the end.

When the pump 216 is activated, the sewage in the existing pipe 12 is
Flow path 164 of seal mechanism 24, flow path 16 of connecting pipe 122
4. Excavator 20 flow path 1o'6°102,'104, through each guide 212.21''4°218, rear pipe line 3
Forced to flow to 0. Note that when adding a new pipe, the pump 216 is temporarily stopped, the valve 222 is temporarily closed, and the second guide 214 is passed through the new pipe.

When updating the operation of the updating device 10, the drive mechanism 94 of the excavator 20 is operated and the crankshaft 52 is rotated. From this, the rotor 56
The cutter assembly 60 is eccentrically e relative to the axis of the shield body 32 and rotates (revolutions) around the crankshaft 52 in the same direction as the rotational direction of the crankshaft 52. Since the meshing portion between the external gear 66 fixed to the rotor 56 and the internal gear 50 fixed to the partition wall 46 is sequentially displaced as the rotor 56 rotates, the rotor 56
s3 and the cutter assembly 60 are also rotated (rotated) about the shaft portion 52b in a direction opposite to the rotational direction of the crankshaft 52.

The pivoting and rotational movement of rotor 56 and cutter assembly 60 causes cutter bit 64 to move toward shield body 32.
Not only does the cutter assembly 60 make a pivoting and rotational movement with respect to the shield body 32, but also with respect to the shield body 32, so-called inwardly toward the center of the shield body 32 and outwardly in the opposite direction, that is, in the radial direction of the shield body 32. make a reciprocating motion.

A thrust force is applied to the excavator 20 by the propulsion mechanism 22 via the newly installed pipe 14 while the cutter assembly 60 is being turned and rotated as described above. As a result, the new pipe 14 is pushed into the excavated hole, and the excavator 20 is advanced while crushing the existing pipe 12 with the cutter assembly 60 and excavating earth and sand around the existing pipe 12.

Since the tip of each cutter bit 64 faces inward and the cutter bit 64 reciprocates in the radial direction of the shield body 32, the cutter bit 64
When the cutter bit 64 moves in the direction of the rotational axis relative to the shield body 32, that is, inwardly, the existing pipe 12
and excavate the earth and sand around the existing pipe 12.

□The existing pipe 12 will be crushed by the inward force exerted by the cutter bit 64. As a result, the existing pipe 1.2
Compared to a device that destroys the existing pipe 12 by applying an outward force, that is, a force that pushes the existing pipe 12 wider, the existing pipe 12 is crushed with a smaller force. Moreover, since no force that would crush the existing pipe 12 is applied when the cutter bit 64 is moved outward, large cracks in the longitudinal direction of the unbroken existing pipe 12 are not generated.

Pickpockets or excavations, including fragments of crushed existing pipes and excavated earth, are received into the first space 38 . The excavated object received in the first space 38 is
As the rotor 56 rotates, the liquid flows from the first space 38 to the second space 40 through the openings 44 of the lattice 42 while being stirred by the blades 108 . The excavated material flowing into the second chamber 40 is mixed with the muddy water supplied into the second chamber 40, and the mixture, ie, slurry, is discharged to the settling tank 188 by the discharge mechanism 26.

Large gravels and debris in the excavated material received in the first space 38 are moved by the rotor 56 to the inner surface defining the first space 38 of the shield body 32 as the rotor 56 pivots and rotates. It is pressed and crushed into small pieces large enough to pass through the opening [144]. The small pieces crushed to a size that can pass through the opening 44 are received into the second space 40 through the opening 44. This prevents slag and debris from clogging the drain tubes 172, 186.

The first and second spaces 38,40 are maintained at a predetermined pressure during the renewal operation so that collapse of the face and heaving of the ground do not occur. As a result, a portion of the excavated material within the first space 38 flows into the existing pipe 12. However, the seal mechanism 2
The sealing member 148 of No. 4 is pressed against the inner circumferential surface of the existing pipe 12 by the excavated material flowing into the existing pipe 12, and the excavated material flows further forward in the existing pipe 12 from the position of the sealing mechanism 24. to prevent Seal member 148 also prevents sewage within existing pipe 12 from flowing into first space 38 .

The seal mechanism 24 is advanced within the existing pipe 12 as the excavation Jfi 20 advances. At this time, the seal mechanism 24
Since the guides 142 and 144 act as a warp, even if there are irregularities on the inner peripheral surface of the existing pipe 12, the sealing mechanism 2
The movement of 4 is smooth.

The shaft 122 of the seal mechanism 24 is rotated around the axis of the shaft 122 as the rotor 56 of the excavator 20 rotates. Therefore, the sewage in the newly constructed pipe 12 is stirred by the stirring blade 136, and the solid matter in the sewage is removed by the blade 13.
As a result, the movement of the sealing mechanism 24 becomes smoother, and the flow path of the temporary flow path mechanism 28 is not blocked.

Due to the pivoting and rotational motion of the rotor 56, the ring 72 of the mechanical seal 68 is pressed toward the seat 74, and the receiver makes a pivoting motion relative to the seat 74. However, due to the pressure in the second space 40, the ring 72 The force of the ring 72 being retracted against the force of the spring 76 does not act on the rear end surface of the ring 72. That is, even if the ring 72 of the mechanical seal 68 is pressed toward the seat 74 due to the pivoting and rotational motion of the rotor 56 and the receiver makes a pivoting motion relative to the seat 74, the outer diameter of the ring 72 remains unchanged. Almost uniform and ring 7
Since the diameter of the contact surface (sealing surface) between the ring 2 and the seat 74 is D, ≦D2-2e, the entire rear end surface of the ring 72 is always in contact with the surface end surface of the receiver 14i74, and therefore ring 7
The force caused by the pressure in the second space 40 does not act on the rear end surface of the second space 40 . Therefore, liquid tightness between the ring 72 and the receiver seat 74 is maintained.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the updating device of the present invention, Fig. 2 is a cross-sectional view of the shield body of the excavator, showing the excavator and the sealing device, and Fig. 3 is an embodiment of the excavator. FIG. 4 is a cross-sectional view taken along line 4-4 in FIG.
5 is an enlarged sectional view taken along the line 5-5 of FIG. 3, FIG. 6 is an enlarged sectional view taken along the line 6-6 of FIG.
The figure is an enlarged sectional view showing one embodiment of the sealing device, FIG. 8 is a left side view of FIG. 7, and FIG. 9 is a sectional view showing one embodiment of the coupling mechanism. 10: Renewal equipment, 12: Existing rod, 14: New pipe, 16: Ground, 20: Shield type tunnel excavator, 22: Propulsion mechanism for excavator and new pipe, 24: Seal mechanism, 26: Excavated material discharge mechanism, 28: Temporary flow path mechanism for sewage, 128: Connection mechanism. Agent Patent Attorney Nobuyuki Matsunaga Figure 5 ζn Figure 6 S2 Procedural Amendment February 4, 1988 Commissioner of the Patent Office Kunio Ogawa 1, Indication of Case Patent Application No. 17214 of 1988 2, Name of the invention: Method and device for renewing existing pipes 3; Relationship with the person making the amendment Patent applicant name: Iseki Kaihatsu Koki Co., Ltd. 4, agent (voluntary) The inside of the pipe is sealed by a sealing means, and the seal is sealed. Means 6, Scope of Claims, Detailed Explanation of the Invention, and Brief Explanation of Drawings in the Specification Subject to Amendment, Column 7, Contents of Amendment (1) The description of the scope of claims is corrected as shown in the attached sheet. (2) r described on page 8, line 17 to page 11, line 19 of the specification
The updating method of the present invention includes... means. ” is corrected as follows. rThe renewal method of the present invention is a method of renewing an existing pipe by laying a new pipe while destroying the existing pipe buried underground, and in which a shield type tunnel excavator is used to install a shield type tunnel excavator at one end of the existing pipe. While moving the excavator forward, the excavator crushes the existing pipe and excavates earth and sand around the existing pipe, and places the new pipe at the excavated location. It is characterized by including. The renewal method of the present invention is also a method of renewing an existing pipe by laying a new pipe while destroying the existing pipe buried underground, and is characterized in that it includes the existing pipe. A shield type tunnel excavator is arranged at the rear, the excavator is moved forward along the existing pipe, and while the excavator is moving forward, the excavator excavates earth and sand while crushing the existing pipe, The method is characterized in that it includes discharging crushed materials and excavated materials produced by the excavator to the rear of the excavator, and arranging the newly installed pipe at the excavated location. The renewal method of the present invention is a method for renewing an existing pipeline by laying a new pipe while destroying the existing pipe buried underground, the method further comprising: sealing the interior of the existing pipe with a sealing means; A shield type tunnel excavator is disposed behind the sealing means, and the excavator is advanced along the existing pipe, and while the excavator is advanced, the flowing liquid flowing through the existing pipe is directed to the sealing means and the tunnel excavator. The earth and sand are made to flow through an excavator to the rear of the excavator, and the earth and sand are excavated while crushing the existing pipe by the surface excavator, and the crushed material and the excavated material by the excavator are discharged to the rear of the excavator, and the Placing a new pipe in an excavated location The renewal device of the present invention is a device for renewing an existing pipe by laying a new pipe while destroying the existing pipe buried underground, A shield type tunnel excavator that is moved from one end of the existing pipe to be replaced to the other end and excavates earth and sand around the new pipe while crushing the existing pipe, and and means for arranging. The renewal device of the present invention is also a device for renewing an existing pipe by laying a new pipe while destroying the existing pipe buried underground, and wherein the existing pipe is installed so as to seal the inside of the existing pipe. A sealing means disposed inside the pipe, and a sealing means moved along the existing pipe from behind the sealing means to seal the existing pipe.
a shield type tunnel excavator that excavates earth and sand while crushing it; a means for discharging the crushed material and excavated material by the excavator to the rear of the excavator; and placing the new pipe at the location excavated by the excavator. and means to do so. The renewal device of the present invention is a device that renews an existing pipe by laying a new pipe while destroying the existing pipe buried underground, and is configured to seal the inside of the existing pipe. a sealing means disposed within the existing pipe; a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means to excavate the ground while destroying the existing pipe; and crushing by the excavator. a stage for discharging materials and excavated materials to the rear of the excavator; and means for causing flowing liquid in the existing pipe to flow to the rear of the excavator via the excavator;
1. (3) The description of the description is revised as follows. 8. List of attached documents A document stating the scope of claims 1 2, Claims] (1) A method for renewing an existing pipe by laying a new pipe for an existing pipe buried underground, the method comprising a shield type tunnel 1tHti cutting machine. While moving the excavator forward from one end of the existing pipe to the other end, the excavator excavates the earth and sand around the existing pipe while crushing the existing pipe, and excavates the earth and sand around the existing pipe. C. A method for renewing an existing pipe, including placing it in an excavated location. (2) Pushing the new pipe into the excavation site by the excavator using a propulsion means provided with at least one jack;
The existing pipe according to claim 1, wherein the newly installed pipe is placed at the excavated location and a force is applied to the excavator through the newly installed pipe to advance the excavator. How to update the road. (3) A method of renewing an existing pipe buried underground by installing a new pipe, the inside of the existing pipe being sealed by a sealing means, and the inside of the existing pipe being sealed behind the sealing means. A shield type tunnel excavator is placed in the tunnel, and the excavator is moved forward along the existing pipe, and while the excavator is moving forward, the excavator excavates earth and sand while crushing the existing pipe, and excavates the earth and sand. How to renew the blood canal and existing pipes by discharging the crushed materials and excavated materials by the excavator to the rear of the excavator and placing the new Mf pipe in the excavated area? Leaving. (4) The broken pieces of the existing pipe are further crushed into small pieces by a crusher placed at the front of the excavator, and the crushed pieces are discharged from the rear of the excavator to the front of the excavator. The method for renewing an existing pipe line according to claim 3, wherein the discharge liquid supplied to the front part of the excavator is discharged to the rear of the excavator together with the discharge liquid while supplying the discharge liquid. (5) A method of renewing existing pipes by laying new pipes while sealing the existing pipes buried underground,
The inside of the existing pipe is sealed by a sealing means, a shield type tunnel excavator is placed behind the sealing means, and the excavating machine is advanced along the existing pipe, and while the excavating machine is moving forward, the tunnel excavating machine is moved forward. flowing the flowing liquid through the sealing means and the excavator to the rear of the excavator, and excavating earth and sand while crushing the existing pipe with the excavator,
A method for renewing an existing pipeline, comprising discharging crushed materials and excavated materials by the excavator to the rear of the excavator, and arranging the new pipe at the excavated location. (6) A connecting mechanism having a flow path for the flowing liquid, which connects the sealing means and the excavator with each other; Claim No. 5, which causes the flow to the excavator
) Renewal method for existing pipelines as described in section 2. (7) A device for renewing an existing pipe buried underground by laying a new 2Ω pipe,
A shield type tunnel excavator that excavates earth and sand around the new pipe while crushing the existing pipe marked mf by being moved from one end of the existing pipe to the other end to the other end, and excavating the new pipe marked nn. equipment for replacing existing pipelines, including means for placing them at locations where they have been installed. (8) The newly installed pipe arranging means includes a propulsion mechanism that pushes the newly installed pipe into the excavation site by the excavator, thereby arranging the newly installed pipe and applying the force of the excavator controller through the newly installed pipe. An existing pipeline renewal device according to claim (7). (9) A device that renews an existing pipe by laying a new pipe once the existing pipe is buried underground, and is arranged within the existing pipe so as to seal the inside of the existing pipe. a sealing means; a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means to excavate earth and sand while crushing the existing pipe; and a shield-type tunnel excavator that excavates earth and sand while crushing the existing pipe; means for discharging to the rear of the
and means for arranging the new pipe at a location excavated by the excavator. ('10) The existing pipe according to claim 9, wherein the sealing means is connected to the excavator by a coupling mechanism disposed within the existing pipe so as to be movable along the existing pipe. Pipe renewal equipment. (11) A device for updating an existing pipe buried underground by laying one new pipe and two new pipes, the device being arranged within the existing pipe so as to seal the inside of the existing pipe. a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means to excavate the ground while destroying the existing pipe; and a shield type tunnel excavator that excavates the ground while destroying the existing pipe; an existing pipe comprising means for discharging to the rear of the machine; means for causing flowing liquid in the existing pipe to flow through the excavator to the rear of the excavator; and means for placing the new pipe at the excavated location. Road renewal equipment. (12) The sealing means is disposed within the existing pipe so as to be movable along the existing membrane pipe, and the sealing means and the excavator form a flow path through which the flowing liquid flows from the sealing means to the excavator. The existing pipe renewal device according to claim 11, wherein the existing pipe line renewal device is interconnected by a connecting mechanism having the following.

Claims (12)

[Claims] (1) A method of renewing an existing pipe by removing the existing pipe buried underground and laying a new pipe in its place, in which a shield type tunnel excavator is used to remove the existing pipe from one end of the existing pipe. While moving the excavator forward, the excavator crushes the existing pipe while excavating earth and sand around the existing pipe, and placing the new pipe at the excavated location. Features: How to update existing pipelines. (2) Pushing the newly constructed pipe into the excavation site by the excavator using a propulsion means including at least one jack;
The existing pipe according to claim (1), wherein the newly installed pipe is placed at the excavated location and a forward force is applied to the excavator through the newly installed pipe to move the excavator forward. How to update the road. (3) A method of renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the method comprising: sealing the inside of the existing pipe with a sealing means; A shield type tunnel excavator is placed behind the
The excavator is advanced along the existing pipe, and while the excavator is moving forward, the excavator excavates earth and sand while crushing the existing pipe, and the crushed material and excavated material by the excavator are removed from the excavated material. A method for renewing an existing pipeline, comprising discharging to the rear of an excavator and arranging the new pipe at the excavated location. (4) The broken pieces of the existing pipe are further crushed into small pieces by a crusher placed at the front of the excavator, and the crushed pieces are discharged from the rear of the excavator to the front of the excavator. The method for renewing an existing pipe line according to claim 3, wherein the discharge liquid supplied to the front part of the excavator is discharged to the rear of the excavator together with the discharge liquid while supplying the discharge liquid. (5) A method of renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the method comprising: sealing the inside of the existing pipe with a sealing means; A shield type tunnel excavator is placed behind the
advancing the excavator along the existing pipe, causing flowing liquid flowing through the existing pipe to flow behind the excavator through the sealing means and the excavator while the excavator is advancing; excavating earth and sand while crushing the existing pipe, discharging the crushed material and excavated material by the excavator to the rear of the excavator, and placing the new pipe at the excavated location. How to update pipelines. (6) A connecting mechanism having a flow path for the flowing liquid, which connects the sealing means and the excavating machine with each other, and the flowing liquid is transferred from the sealing means to the excavating machine through the connecting mechanism. A method for renewing an existing pipeline according to claim (5), wherein the method is made to flow into a pipe. (7) A device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the equipment being directed from one end of the existing pipe to be replaced to the other end. A shield type tunnel excavator that excavates earth and sand around the new pipe while crushing the existing pipe, and means for placing the new pipe at the excavated location. . (8) The newly installed pipe arranging means includes a propulsion mechanism that pushes the newly installed pipe into the excavation site by the excavator, thereby arranging the newly installed pipe and applying a forward force to the excavator through the newly installed pipe. An existing pipeline renewal device according to claim (7). (9) A device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the device being placed inside the existing pipe so as to seal the inside of the existing pipe. a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means to excavate earth and sand while crushing the existing pipe; An apparatus for renewing an existing pipeline, comprising means for discharging the pipe to the rear of an excavator, and means for arranging the new pipe at a location excavated by the excavator. (10) The existing pipe according to claim (9), wherein the sealing means is connected to the excavator by a coupling mechanism disposed within the existing pipe so as to be movable along the existing pipe. Road renewal equipment. (11) A device for renewing an existing pipe by removing an existing pipe buried underground and laying a new pipe in its place, the device being placed inside the existing pipe so as to seal the inside of the existing pipe. a shield type tunnel excavator that is moved along the existing pipe from behind the sealing means to excavate the ground while destroying the existing pipe; and a shield type tunnel excavator that excavates the ground while destroying the existing pipe; means for discharging the existing pipe to the rear of the excavator; means for causing the flowing liquid in the existing pipe to flow through the excavator to the rear of the excavator; and means for placing the new pipe at the excavated location. Pipe renewal equipment. (12) The sealing means is disposed within the existing pipe so as to be movable along the existing pipe, and the sealing means and the excavator have a flow path that allows the flowing liquid to flow from the sealing means to the excavator. The existing pipe renewal device according to claim (11), which is connected to each other by a connecting mechanism.