JPH1181870A - Pusher device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize limited space by minimizing a starting vertical shaft in pushing a pushing pipe in a mud water construction method. SOLUTION: A pressure support wall 1 of a cylinder 5 to compose a jack C, and an installation part 7 where an engagement member 6 is installed on the opposite side of the pressure support wall 1 are provided. A mud water processing device 21 installed on the ground and a cutter head 11 of a boring machine F are connected to each other by a mud feed pipe 22 through a mud feed pump 24 installed on the ground, and connected to each other by a mud discharge pipe 23 through a mud discharge pump 25 installed in a starting vertical shaft E. The pipes 22, 23 are disposed in paralell in the starting vertical shaft E, and bypass pipings are formed of a valve gear 26. The valve gear 26 comprises a valve element driven to rotate by a hydraulic cylinder 31 which is installed in a casing having through openings, and a bypass pipe 29 to connect the casing, so it is of a simple constitution, and that operation space is not required. Inner parts of the starting vertical shaft E can thus be largely utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion device capable of minimizing the installation area of a shaft by providing a bypass valve device in a starting shaft.

[0002]

2. Description of the Related Art When laying sewer pipes or other pipes underground, a propulsion method is generally employed. In this method, a start shaft and an arrival shaft are constructed on the planned laying line of the pipeline to be laid, the excavator is propelled by the main pushing device installed in the start shaft, and then the propulsion pipe is made to follow the excavator Is what you do. Then, when the excavator arrives at the arrival shaft, a continuous propulsion pipe is laid between the start shaft and the arrival shaft.

[0003] Since the above-mentioned pipeline is laid under the road, it greatly affects surrounding traffic conditions during the laying work. For this reason, there is a demand for reducing the area of each shaft as much as possible. Even when a branch pipe with a relatively small diameter is laid from the main line, it is required to construct a shaft having a diameter of about a manhole and to carry out the construction.

In order to meet the above demand, there has been proposed a propulsion device in which the stroke of the main pushing device is reduced, and the main pushing device is driven a plurality of times to propel an excavator or a propulsion pipe. For example, the technology disclosed in Japanese Utility Model Publication No. 3-32632
A press-fitting member that abuts against the rear end surface of the buried pipe to propell the pipe, and a jack that advances the press-fitting member back and forth, and alternately pins the press-fitting member, the rear end and the front end of the cylinder. By connecting the jacks, etc., the jack is driven twice to propel one buried pipe.

If the face facing the excavator collapses when the propulsion method is carried out, the propulsion direction of the excavator may deviate from the planned laying line and the direction control may not be possible. For this reason, a muddy construction method has been adopted in which muddy water having a pressure that can oppose the underground water pressure is supplied to the front of the excavator so that the cutting face is propelled while being stabilized. In this construction method, the muddy water treatment equipment installed on the ground and the excavator are connected by two pipe systems consisting of a mud pipe and a mud pipe, and the mud pump is interposed in the mud pipe and the mud pump is placed in front of the excavator. And the muddy water and earth and sand in front of the excavator are sucked by a muddy water pump interposed in a mud drainage pipe and returned to the muddy water treatment device.

[0006] In the above-mentioned muddy water method, each time the propulsion of one propulsion pipe is completed, the mud pipe and the drain pipe are separated, and each time a propulsion pipe to be newly propelled is arranged in the main pushing device, a new mud pipe is provided. And a mud pipe are added. The muddy water is configured to be able to return to the muddy water treatment device via the bypass pipe while the mud feeding pipe and the mud draining pipe are separated and added.

Here, the configuration of the bypass circuit is shown in FIG.
This will be described below. In the figure, a mud feed pipe is connected to a pipe 51 from the direction of arrow a, and the pipe 51 is provided with two motor valves 52a and 52b. Two pipes 53 and 54 are branched from between the motor valves 52a and 52b. Further, a pipe 55 to which a drain pipe is connected is arranged from the direction of arrow c, and the pipe 55 and the pipe 53 are connected. Further, a tube 56 connected to the tubes 51 and 54 is connected to the tube 55. The pipes 53 to 56 are provided with ball valves 53a to 56a, respectively. By opening and closing the ball valves 53a to 56a as appropriate, mud is sent in the direction of arrow b and discharged in the direction of arrow d. It is possible to feed the sludge in the direction of arrow e and discharge the sludge in the direction of arrow f at the time of reverse flow. still,
57 is a drain valve, and 58 is a valve for venting air.

[0008]

The technique disclosed in the above-mentioned Japanese Utility Model Publication No. 3-32632 has not been perfect yet, and it has not been perfect yet. It is insufficient to effectively utilize the narrow space to improve workability.

In the bypass circuit as described above, an independent valve is provided for each pipe to open and close each pipe system. For this reason, a complicated piping system is provided inside the starting shaft, and a space for opening and closing each valve is required, which causes a problem that the starting shaft cannot be reduced in size.

[0010] An object of the present invention is to provide a propulsion device configured so that the space of a narrow starting shaft can be effectively utilized.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a propulsion device according to the present invention supplies a muddy water between a front surface of a drilling machine and a ground and discharges the supplied muddy water and the excavating machine. A propulsion method for propelling a propulsion pipe following an excavator from a starting shaft, comprising a mud water treatment device installed on the ground,
A frame having a bearing wall and rails installed in the starting shaft,
A push wheel movably mounted on the rail, and a cylinder having a rod end supported on the support wall, and selectively engaging the push wheel at both ends of the cylinder to reduce thrust. A jack provided with an engaging member for transmitting, a mud excavator and a muddy water treatment device are connected by a mud pipe through a mud pump installed on the ground, and a mud pump is installed in the starting shaft. At the same time, the excavator and the muddy water treatment device are connected by a mud pipe via the mud pump, and the discharge pipe of the mud pipe and the suction pipe of the mud pipe are connected in parallel in the starting shaft, and 3
A rotatable valve body is provided in a casing having two openings, and two openings are formed in the casing so as to selectively connect the openings in accordance with the rotational position of the valve body. The bypass valve device is configured by connecting to one pipe and connecting one opening to each other.

A casing having three openings is formed in this section by making the pipe on the suction side of the mud pump and the pipe on the discharge side of the mud pump installed in the starting shaft parallel to each other.
Since two valves are arranged, a mud feed pipe and a mud drain pipe are connected to two openings, respectively, and the remaining openings are connected to each other to form a bypass valve device, the piping system can be integrated compactly, and The operation space for opening and closing the valve can be reduced. Therefore, the starting shaft can be made small and the internal space can be widely used.

The above-described propulsion device has a cylinder with a short stroke (about half the stroke of the propulsion pipe) by selectively engaging the engagement members provided at both ends of the jack and the push ring for propulsion. A jack can be used. For this reason, the size of the starting shaft can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above propulsion device will be described below with reference to the drawings. 1 is a side view of a propulsion device, FIG. 2 is a plan view of a starting shaft, FIG. 3 is a plan view illustrating the arrangement of a sludge pump, FIG. 4 is a plan view of a valve device, and FIG. 5 is a side view of the valve device. is there.

The propulsion device shown in FIG.
And a jack C for reciprocating the push wheel B, and a piping system D for muddy water. This propulsion device is installed inside a circular starting shaft E having a diameter of, for example, about a manhole, and propells the excavator F while stabilizing the cutting face, and follows the excavator F to make a propulsion pipe G And lay a pipeline consisting of a continuous propulsion pipe G underground.

The frame A has a supporting wall 1 which abuts against a side wall surface of the starting shaft E to support a reaction force during propulsion, and a gantry 2 formed integrally with the supporting wall 1. Have been. Furthermore,
On the gantry 2, a mounting table 2a for mounting the excavator F and the propulsion pipe G and guiding the propulsion direction, and a rail 2b arranged in parallel with the mounting table 2a and movably mounting the pressing wheel B are formed. Have been.

The push wheel B moves along the gantry 2 and
The thrust is transmitted to the excavator F or the propulsion pipe G following the excavator F in the process of moving (forwarding) in the direction of arrow a. A hole 3 is formed at the center of the pressing ring B.
A mud feed pipe 22, a mud discharge pipe 23, and a power supply cap tire and a signal cable (not shown), which will be described later, are inserted through the inside.

The push wheel B is mounted on the rail 2b of the frame A, and moves on the rail 2b driven by the jack C or driven manually. It is preferable that the friction loss is small when the pressing wheel B moves on the rail 2b. For this reason, a carriage with wheels is attached to the push wheel B, and when only the push wheel B is moved, the push wheel B is configured to be easily driven with a small force of about human power.

When the excavator F and the propulsion pipe G are propelled or the propelled pipe G is pulled back to the starting shaft E side, the push wheel B is engaged with the jack C, and the force generated by the jack C is transmitted. . For this reason, both sides in the width direction of the pressing wheel B are configured to be able to appropriately transmit a force from the jack C.

The jack C applies thrust to the pressing wheel B, and is constituted by arranging two hydraulic cylinders including a rod 4 and a cylinder 5 in parallel with the rail 2b. The tip of the rod 4 is attached to the supporting wall 1 of the frame A so that the rod 4 can swing in all directions.

At a predetermined position on the end side of the cylinder 5 on the bearing wall 1 side and the end side opposite to the bearing wall 1, the cylinder 5 is engaged with the pressing wheel B to apply thrust to the pressing wheel. A mounting portion 7 for mounting the transmitting engaging member 6 is formed.

A plurality of comb teeth portions 7a are formed on the mounting portion 7 at a predetermined pitch so that the engaging member 6 can maintain the mounted state when the engaging member 6 is mounted. ing. Then, an engaging member 6 formed in a U-shape and having teeth meshing with the opposing comb teeth is selectively mounted on the comb teeth portion 7a, and the engaging member 6 is brought into contact with a desired surface of the pressing wheel B. By doing so, it is possible to transmit the thrust generated by the jack C to the push wheel B to move forward or backward.

In this embodiment, the mounting portion 7 on the supporting wall 1 side is used.
The distance between the support portion 1 and the mounting portion 7 on the opposite side is set to be substantially equal to the stroke of the jack C. Therefore, the engaging member 6 is attached to the mounting portion 7 on the support wall 1 side, and the pressing wheel B is propelled to the stroke limit of the jack C. Then, the jack C is contracted to reduce the jack C on the side opposite to the support wall 1. The propulsion pipe G can be propelled twice the stroke of the jack C by mounting the engaging member 6 on the mounting portion 7 and propelling the jack C to the stroke limit.

The excavator F implements a muddy water method, and has a shield body with a cutter head 11 attached to the head thereof.
The shield body 12 and the tail shield 13 are connected to the shield body 12 via a plurality of direction control jacks 14. The tail shield 13 is connected to a machine cylinder 15 containing a hydraulic pump and other equipment, and is configured to supply pressure oil for driving the directional jack 14 from the machine cylinder 15.

In the muddy water method, muddy water whose specific gravity is adjusted is supplied to the cutter head 11 against the underground water pressure for the purpose of stabilizing the cutting face, and the excavated earth and sand is mixed with the muddy water and discharged. . Therefore, a muddy water treatment device 21 is installed on the ground, and a piping system D is configured between the muddy water treatment device 21 and the excavator F.

The piping system D includes a mud feeding pipe 22 and a mud discharging pipe 23 connected between the muddy water treatment apparatus 21 and the cutter head 11, a mud feeding pump 24 installed in the path of the ground mud feeding pipe 22, Sludge pipe 23
And a mud pump 25 installed in the path of the mud pipe 22 downstream of the discharge port of the mud pump 24 and upstream of the suction port of the mud pump 25 of the mud pipe 23. Placed each said pipe
And a valve device 26 having a function of bypassing the valves 22 and 23. In particular, the muddy water treatment apparatus 21 is loaded on a 4-ton unic so that it can be used in a densely populated area of a house or a place where the road width is narrow and where the exclusive area of the starting shaft E is required to be small. Those having the possible size and weight are employed.

The sludge pipe 22 and the sludge pipe 23 are not constituted by a single pipe, but are constituted by a steel pipe and a hose. That is, steel pipes are used for the pipes 22 and 23 between the excavator F and the propulsion pipe G and between the valve device 26 and the muddy water treatment apparatus 21, and the portions corresponding to the inside of the starting shaft E, that is, A hose is used between the last propulsion pipe G and the valve device 26.

The mud pump 24 is installed on the ground. The mud pump 25 is installed inside the starting shaft E in order to make the suction head as small as possible. Is provided. For this reason, the drainage pump 25 is
It is installed on a platform 27 provided inside. In this embodiment, a pump having a high suction capacity is employed as the sludge pump 25 for the purpose of extending the propulsion distance.

As shown in FIGS. 4 and 5, the valve device 26 is constituted by connecting valves 28 provided in respective pipes 22 and 23 by a bypass pipe 29. The valve 28 is configured by rotatably mounting a valve body 28e on a casing 28d having three openings 28a to 28c, and the openings 28a and 28b are arranged to face the pipes 22 and 23, respectively. The opening 28c is arranged to face the bypass pipe 29.

The valve bodies 28e of the respective valves 28 are arranged with the same posture, and are connected to each other via a bracket 30. By driving the bracket 30 by a hydraulic cylinder 31 which is remotely controlled, the muddy water treatment device 21 and the cutter head 21 are connected to perform mud feeding and mud discharging to the cutting face, and supply muddy water to the cutter head 21. It is possible to bypass by the valve device 26 without. As such a valve device, for example, a Japanese Utility Model 6-72 developed by the present applicant.
It is possible to use the valve device disclosed in No. 32.

In the drawing, reference numeral 32 denotes a laser theodolite, which irradiates a laser beam along a predetermined laying line of the propulsion pipe G, and detects a propulsion direction of the excavator F based on the laser beam. is there. Reference numeral 33 denotes an operation panel, which controls the equipment and controls the excavator F.

In the propulsion device configured as described above, the propulsion of one propulsion pipe G is completed, and every time a new propulsion pipe G is connected to this propulsion pipe G, the inside of the propulsion pipe G already propelled is set. Separate the mud pipe 22 and the mud pipe 23 located in the
Work to connect a new mud sending pipe 22 and a new mud pipe 23 to 22 and 23 is performed.

The above operation is performed by the hydraulic cylinder 31 of the valve device 26.
Is driven to rotate the valve element 28e to shut off the mud feeding pipe 22 and the mud discharging pipe 23 and to communicate with the bypass pipe 29 to return the muddy water without supplying it to the cutter head 21 side. The mud pipes 22 and the mud pipes 23 arranged inside the new propulsion pipes G in the mud pipes 22 and the mud pipes 23 of the propelled propulsion pipes G
This is done by connecting Therefore, the operation of returning the muddy water is extremely easy, and the starting shaft E does not require a space for operating the valve device 26. For this reason, the starting shaft E can be made as small as possible.

Next, a procedure for propelling the propulsion pipe G by the propulsion device will be briefly described. After propelling one propulsion pipe G, the jack C is reduced and the pressing wheel B is pressed to the supporting wall 1.
Move to the side. In this state, after a new propulsion pipe G is mounted on the rail 2a, the above operation is performed, and the respective propulsion pipes 22, 23 of the propulsion pipe G already propelled are connected to the respective propulsion pipes 22, 23. And connect the power cap tire and signal line.

After connecting the new mud pipe 22 and the new mud pipe 23 of the propelled pipe G to the mud pipe 22 and the mud pipe 23 of the propelled pipe G already driven, the hydraulic cylinder 31 of the valve device 26 is driven. Then, by rotating the valve element 28e, the mud feeding pipe 22 and the mud discharging pipe 23 are respectively opened and the bypass pipe 29 is shut off.

Next, the cylinder 5 constituting the jack C
The jack C is driven by attaching the engaging member 6 to the mounting portion 7 on the supporting wall side of the above, and the propulsion pipe G is propelled by one stroke of the jack C. Next, only the jack C is reduced (the push wheel B maintains a state of contact with the propulsion pipe G), and the mounting portion 7 of the cylinder 5 on the opposite side to the bearing wall 1 is opposed to the push wheel B. By attaching the engaging member 6 to the mounting portion 7 to drive the jack C and to propel the propulsion pipe G by one stroke of the jack C, it is possible to propell one propulsion pipe G.

[0037]

As described in detail above, in the propulsion device according to the present invention, the mounting portion of the engaging member is provided on the supporting wall side of the cylinder constituting the jack and on the side opposite to the supporting wall.
A jack having a short stroke cylinder can be used by selectively attaching an engaging member to the mounting portion and engaging and pushing the engaging member and the pressing ring. For this reason, the size of the starting shaft can be reduced.

Further, a mud pump is installed in the starting shaft, and the pipe on the suction side of the mud pump and the pipe on the discharge side of the mud pump installed on the ground are arranged in parallel to form a casing having three openings. Since the bypass valve is connected to each pipe and one opening of the casing is connected to each other to form a bypass circuit, the bypass pipe system can be made compact. In addition, since the operation space can be reduced, the starting shaft can be reduced and the internal space can be widely used.

[Brief description of the drawings]

FIG. 1 is a side view of a propulsion device.

FIG. 2 is a plan view of a starting shaft.

FIG. 3 is a plan view illustrating an arrangement of a sludge pump.

FIG. 4 is a plan view of the valve device.

FIG. 5 is a side view of the valve device.

FIG. 6 is a diagram illustrating a configuration of a conventional bypass circuit.

[Explanation of symbols]

 Reference Signs List A Frame B Push wheel C Jack D Piping system E Starting shaft F Drilling machine G Propulsion pipe 1 Support wall 2 Base 2b Rail 3 Hole 4 Rod 4 Cylinder 6 Engaging member 7 Mounting part 11 Cutter head 12 Shield body 13 Tail shield 14 Direction control jack 15 Machine cylinder 21 Mud water treatment device 22 Mud pipe 23 Mud pipe 24 Mud pump 25 Mud pump 26 Valve unit 27 Platform 28 Valve 28a to 28c Opening 28d Casing 28e Valve element 29 Bypass pipe 30 Bracket 31 Hydraulic Cylinder 32 Laser theodolite 33 Control panel

Claims (1)

[Claims] 1. A propulsion method in which muddy water is supplied between a front surface of an excavator and a ground, and a supplied excavator and a propulsion pipe following the excavator are propelled from a starting shaft while discharging the supplied muddy water. A mud water treatment device installed on the ground, a frame installed in a starting shaft and having a supporting wall and a rail, a push wheel movably mounted on the rail, and an end of a rod on the supporting wall. And a jack provided with an engaging member that selectively engages with the push ring at both ends of the cylinder and transmits a thrust, and that a gap between the excavator and the muddy water treatment device is provided. A mud pipe is connected through a mud pump installed on the ground, and a mud pump is installed in the starting shaft, and the excavator and the muddy water treatment device are connected by a mud pipe through the mud pump. In the starting shaft, the discharge pipe of the mud pipe and the suction pipe of the Piping was performed in parallel, a rotatable valve element was provided in a casing having three openings, and a valve configured to selectively connect the openings in accordance with the rotational position of the valve element was formed in the casing. A propulsion device wherein two openings are connected to respective pipes and one opening is connected to each other to constitute a bypass valve device.