JPH0430520B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a backfill material injection device for a shield excavator, and more specifically, the device is installed on the outer peripheral wall of a skin plate forming a shield body, and The present invention relates to a device for injecting a backfilling material into a tail void portion due to a difference in outer diameter of a segment.

[Conventional technology]

An example of a shield excavator equipped with a backfill material injection device will be explained with reference to FIGS. 8 and 9.

A lip portion is attached to the outer circumferential surface of a cylindrical segment 3 on the inner circumferential surface of the rear end of the skin plate (cylindrical outer shell) 2 that forms the main body of the shield excavator 1 equipped with a cutter foil for excavating a face 101 of the earth 100. The tail seal 4 that has been brought into contact is attached,
A plurality of approximately semicircular protection tubes 5 constituting a backfilling material injection device are provided on the outer peripheral wall at intervals on the circumference. When the shield excavator excavates the earth 100 and assembles the segment 3 on the inner peripheral surface of the tail seal 4, a space is created immediately after the shield excavator 1 (a space due to the difference between the excavation outer diameter and the segment outer diameter),
That is, the backfilling material is injected into the tail void 6 by the backfilling material injection device in synchronization with the excavation of the shield excavator 1.

As a conventional backfilling material injection device of this type, there is a backfilling material injection device proposed by the present applicant in Japanese Utility Model Application No. 47797/1983. This backfilling material injection device is used to inject into the outer peripheral wall of the skin plate that forms the shield body.
A protective tube having an injection port wall on the rear end side is provided, a backfilling material injection port is provided in the injection port wall, a backfilling material injection conduit and a cleaning water conduit are configured in the protective tube, and the backfilling material is injected into the protective tube. A spool for opening and closing the outlet of the injection pipe is slidably inserted into the backfilling material injection port,
A sliding operation means is connected to the rod connected to the spool, and the outlet of the backfilling material injection pipe and the backfilling material injection port are communicated by extending and retracting the rod,
While switching the communication between the wash water pipe and the outlet of the backfill material injection pipe, the discharge side of the pump connected to the storage tank is connected to the backfill material injection pipe through a supply pipe equipped with an on-off valve. In addition, a discharge pipe equipped with an on-off valve is connected to the washing water pipe.
When injecting the backfilling material, the backfilling material is stored in the storage tank and the spool is slid forward by retraction of the rod to communicate the outlet of the backfilling material injection pipe and the backfilling material injection port. Then, the on-off valve of the supply pipe is opened and the pump is driven to feed the backfilling material into the backfilling material injection conduit and inject it into the tail void from the backfilling material injection port. In addition, when the backfilling material injection work is completed and the inside of the pipeline is cleaned, make sure that no backfilling material remains in the storage tank, fill the storage tank with cleaning water, open the on-off valve of the discharge pipe, and , the spool is slid backward by the protrusion of the rod to communicate the outlet of the backfilling material injection pipe with the cleaning water pipe, and the pump is driven to supply the cleaning water, the backfilling material injection pipe, and the cleaning water pipe. water pipe,
The backfilling material remaining in the backfilling material injection pipe is flushed out by passing through the discharge pipe in this order. Note that the opening and closing operations of the on-off valve of the supply pipe and the on-off valve of the discharge pipe are performed manually.

[Problem that the invention seeks to solve]

The above-mentioned backfilling material injection device uses a single storage tank as both a backfilling material storage tank and a wash water storage tank, and the on-off valve of the supply pipe and the on-off valve of the discharge pipe are manually operated. It takes time and effort to move from the injection of the filler material to the cleaning of the inside of the pipe, and the cleaning cycle is delayed, so that the backfill material remaining in the backfill material injection pipeline gradually solidifies before it is cleaned. As a result, cleaning may take a long time, or the backing material that has solidified on the pipe wall cannot be washed away, and the solidified backing material may accumulate inside the pipe and block the pipe. I had a problem.

The object of the present invention is to provide a shield that can be immediately moved to a cleaning process after the completion of injection of backing material, clean the inside of the pipeline in a short cleaning time, and prevent blockage of the pipeline due to solidified backing material. An object of the present invention is to provide a backfilling material injection device for an excavator.

[Means for solving problems]

The above object is to provide a protective tube having an inlet wall on the rear end side on the outer peripheral wall of the skin plate forming the shield body, provide a backing material inlet in the inlet wall, and provide a backing material inlet in the protective tube. A spool that constitutes the backfilling material injection pipe and the cleaning water pipe and switches the outlet of the backfilling material injection pipe to open and close is slidably inserted into the backfilling material injection port, and the spool is slidably inserted into the rod connected to the spool. By connecting the moving operation means and protruding and retracting the rod, the outlet of the backfilling material injection pipe and the backfilling material injection port are communicated, and the washing water pipe and the outlet of the backfilling material injection pipe are communicated with each other. In the backfilling material injection device for a shield excavator, the inlet of the backfilling material injection pipe is connected to a backfilling material supply pipe equipped with a first solenoid valve, and the washing water pipe is connected to the backfilling material supply pipe equipped with a first electromagnetic valve. 2, and a cleaning water discharge pipe equipped with a third solenoid valve is connected to the first solenoid valve outlet side of the backing material supply pipe; A first detector for detecting the stuck position and a second detector for detecting the protruding position of the rod are provided, and when a detection signal is output from the first detector, the first solenoid valve opens and the second solenoid valve opens.
By configuring the solenoid valve and the third solenoid valve to close, and when the second detector outputs a detection signal, the first solenoid valve closes and the second solenoid valve and the third solenoid valve open, achieved.

[Effect]

When injecting backfilling material, when the rod is retracted to slide the spool and communicate the outlet of the backfilling material injection pipe and the backfilling material inlet, the rod is at the first retracted position. The first electromagnetic valve is detected by a detector, and the first electromagnetic valve is opened and the second electromagnetic valve and the third electromagnetic valve are closed by a detection signal from the first detector. When the pump is driven in this state, the backfilling material is fed into the backfilling material injection conduit through the backfilling material supply pipe, and then injected into the tail void from the backfilling material injection port. After the injection of the backfilling material is completed, when the rod is pushed out for cleaning and the spool is slid to communicate the outlet of the backfilling material injection pipe with the cleaning water pipe, the protruding position of the rod is is detected by the second detector, and the detection signal from the second detector causes the first
The solenoid valve is closed, and the second solenoid valve and the third solenoid valve are opened. When the pump is operated in this state, the cleaning water flows through the cleaning water supply pipe, the cleaning water pipe, the backfilling material injection pipe, the backfilling material supply pipe, and the washing water discharge pipe in this order, and then flows into the backfilling material injection pipe. Wash away the remaining backfill material. As a result, the cleaning process can be started immediately after the injection of the backfilling material is completed.In other words, the cleaning cycle can be accelerated and the backfilling material inside the pipe can be cleaned before it solidifies, so the inside of the pipe can be cleaned in a short cleaning time. can be cleaned thoroughly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Fig. 1 is a cross-sectional view of a backfilling material injection device according to the present invention, a backfilling material supply system, and a washing water supply system; Fig. 2 is a cross-sectional view showing the retracted state of the spool rod in Fig. 1; The figure is the first
FIG. In the figure, 2 is a skin plate, 3 is a segment, 4 is a tail seal, and 5 is a protective tube. A backfilling material injection port 7 and a backfilling material injection conduit 8 are provided in the inlet wall portion 6 on the rear end side of the protection tube 5 . A backfilling material injection hose 10 is connected via a joint 9.

A spool 11a integrated with a spool rod 11 is slidably inserted into the backfilling material injection port 7. An inclined surface is formed at the rear end of the spool 11a. Spool rod 11 and spool 11
A is provided with a cleaning water conduit 12 along the axial direction, and an opening 12a of the conduit 12 is provided in the spool 11a in the radial direction. The spool rod 11 is a front support plate 1 attached to the inner wall of the protection tube 5.
3. Supported by the rear support plate 14. The bent portion of the front end of the spool rod 11 and the bent portion of the front end of the backing material injection hose 10 are led out from a take-out hole 15 provided in the skin plate 2. The backfilling material injection hose 10 is connected to the discharge side of the backfilling material pump 18 via a backfilling material supply pipe 17 equipped with a first electromagnetic valve 16 . The suction side of the backfilling material pump 18 is connected to a backfilling material storage tank 19 . Spool rod 1
The wash water pipe line 12 in the wash water pump 1 is connected to the discharge side of a wash water pump 22 via a wash water supply pipe 21 equipped with a second electromagnetic valve 20 . The suction side of the wash water pump 22 is connected to a wash water storage tank 23 . Further, one side of a wash water discharge pipe 25 equipped with a third solenoid valve 24 is connected to the outlet side of the first solenoid valve 16 of the backfilling material supply pipe 17, and the other side of the discharge pipe 25 is connected to a discharge tank 26. It is connected to the.

A hydraulic cylinder 27 serving as a sliding operation means is installed between the bent portion of the front end of the spool rod 11 and a supporting portion integral with the skin plate 2. A detection rod 28 is attached to the bent portion of the front end of the spool rod 11, and a first detector 29 and a spool rod are attached to the skin plate 2, which detects the retracted position of the spool rod 11 by contact with the tip of the detection rod 28. A second detector 30 is installed to detect the protruding position of 11. These detectors and the above-mentioned solenoid valve are interlocked, and when a detection signal is output from the first detector 29, the first solenoid valve 1
6 is opened, the second solenoid valve 20 and the third solenoid valve 24 are closed, and when a detection signal is output from the second detector 30, the first solenoid valve 16 is closed, and the second solenoid valve 20 is closed.
And the third solenoid valve 24 is opened. First detector 2
As the detector 9 and the second detector 30, for example, a micro switch is used.

Next, the operation of this embodiment will be explained.

When injecting the backing material, the spool rod 11 and the spool 11 are moved by the extension of the hydraulic cylinder 27.
a to the front (to the left in the figure) to communicate the outlet 8a of the backing material injection pipe 8 with the backing material injection port 7, the retracted position of the spool rod 11 is detected by the detection rod 28. The detection signal from the first detector 29 causes the first solenoid valve 16 to open, and the second solenoid valve 20 and the third solenoid valve to open.
Solenoid valve 24 is closed. When the backfill material pump 18 is driven in this state, the backfill material in the backfill material storage tank 26 is fed into the backfill material injection pipe 8 through the backfill material supply pipe 17 and the backfill material injection hose 10. The backfilling material is injected into the tail void from the injection port 7. After the injection of the backing material is completed, the hydraulic cylinder 27 is contracted to remove the spool rod 11 and the spool 1 for cleaning.
1a to the rear (to the right) and communicates the outlet 8a of the backfilling material injection pipe 8 with the opening 12a of the wash water pipe 12, the protruding position of the spool rod 11 is detected via the detection rod 28. It is detected by the second detector 30, and the first solenoid valve 16 is closed and the second solenoid valve 20 and the third solenoid valve 24 are opened by the detection signal from the second detector 30. When the wash water pump 22 is driven in this state, the wash water in the wash water storage tank 23 is transferred to the wash water supply pipe 21, the wash water pipe 12, the backfill material injection pipe 8, the backfill material injection hose 10, and the wash water discharge pipe 2.
5, and the backfilling material remaining in the backfilling material injection pipe 8 is washed away.

As described above, in this embodiment, the cleaning process is started immediately after the injection of the backfilling material is completed, that is, the cleaning cycle is accelerated and the backfilling material in the pipe can be cleaned before it hardens. , the inside of the pipe can be thoroughly cleaned in a short cleaning time. As a result, it is possible to reliably prevent the inside of the pipe from being blocked by the solidified backing material.

In addition, in the above embodiment, the blended backfilling material is put into the backfilling material storage tank 19, and the backfilling material is pumped into the backfilling material pump 18.
Although an example was shown in which the backfilling material is sent to the supply pipe 17 by the above, as shown in FIG.
A, a storage tank 19B for storing the other component liquid, a pump 18B thereof, and a mixing nozzle 31. The material may also be delivered to the backfilling material supply pipe 17.

Furthermore, as shown in FIG. 5, one pump 32 is used as both the backfill material pump and the wash water pump, and the backfill material supply pipe 17 and the wash water supply pipe 21 are connected to the discharge side of the pump 32. , and the suction side of the pump 32 is connected to the backfilling material storage tank 19 via a fourth electromagnetic valve 33, and is connected to the wash water storage tank 23 via a fifth electromagnetic valve 34, and the fourth electromagnetic valve 33 is connected to the 1 detector 29 so that the fifth
The solenoid valve 34 is opened by a detection signal from the second detector 30, and when the backfilling material is injected, the pump 32 transfers the backfilling material from the backfilling material storage tank 19 to the backfilling material supply pipe 17.
The cleaning water from the cleaning water storage tank 23 may be sent to the cleaning water supply pipe 21 by the pump 32 during cleaning.

Further, although the above embodiment shows an example in which the wash water pipe 12 is provided inside the spool rod 11, the wash water pipe 12 may also be provided outside the spool rod 11. Specific examples are shown in Figures 6 and 7.
To explain with reference to the drawings, a cylindrical body 35 having a backing material inlet 7 provided on the rear end wall is installed in the protective tube 5, and a cleaning water pipe 11 is formed within the cylindrical body 35. Further, a spool rod 11 is disposed inside the cylinder 35, and a spool 11a is inserted into the backfilling material injection port 7.
is connected to. A detection rod 28 of a first detector 29 and a second detector 30 is attached to the opposite side of the piston 27a of the hydraulic cylinder 27. A backfilling material injection conduit 8 is formed on the outside of the cylindrical body 35, and this backfilling material injection conduit 8 is connected to a backfilling material injection hose 10. The cleaning water pipe device 11
is connected to the wash water supply pipe 21. and,
As shown in FIG. 6, by moving the piston 27a of the hydraulic cylinder 27 forward (to the left in the figure), the spool rod 11 and the spool 11a are slid forward, and the outlet 8a of the backing material injection pipe 8 and the back When communicating with the filling material inlet 7, the spool rod 11
The retracted position of the hydraulic cylinder 27 is detected by the first detector 29 via the detection rod 28, and as shown in FIG.
When the spool rod 11 and the spool 11a are slid rearward to communicate the outlet 8a of the backing material injection pipe 8 and the backing material injection port 7, the protruding position of the spool rod 11 is located at the detection rod 28. is detected by the second detector 30 via the.

〔Effect of the invention〕

According to the present invention, the cleaning process can be started immediately after the injection of the backfilling material is completed, that is, the cleaning cycle can be sped up and cleaning can be performed before the backfilling material in the pipe hardens, resulting in a short cleaning process. You can clean the inside of the pipe in a short amount of time. Therefore, it is possible to reliably prevent the inside of the pipe from being blocked by the solidified backing material.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a sectional view of a backfilling material injection device according to the present invention, a backfilling material supply system, and a washing water supply system, and FIG. 2 is a diagram showing an embodiment of the present invention. is a sectional view showing the retracted state of the spool rod in Figure 1, and Figure 3 is a cross-sectional view of the spool rod in Figure 1.
The sectional view, Figures 4 and 5 are the backfilling material supply system;
Figure 6 is a sectional view showing another example of the washing water supply system; Figure 6 is a sectional view showing another example of the backfilling material injection part, showing the spool rod in the retracted state; Figure 7 is a sectional view showing the spool rod in the protruding state. , FIG. 8 is a cross-sectional side view showing an example of a shield tunneling machine, and FIG. 9 is a cross-sectional view taken from FIG. 8. DESCRIPTION OF SYMBOLS 1...Shield excavator, 2...Skin plate, 3...Segment, 5...Protection tube, 6...Tail void, 7...Backfill material injection port, 8...Backfill material injection conduit, 8a... ...Outlet, 11...Spool rod, 11a...Spool, 12...Washing water pipe,
16...First solenoid valve, 17...Backfilling material supply pipe, 1
8... Backfilling material pump, 19... Backfilling material storage tank, 20
...Second solenoid valve, 21...Washing water supply pipe, 22...
...Cleaning water pump, 23...Cleaning water storage tank, 24...
Third solenoid valve, 25...Cleaning water discharge pipe, 26...Drain tank, 27...Hydraulic cylinder, 28...Detection rod,
29...first detector, 30...second detector.

Claims (1)

[Claims] 1. A protective tube having an injection port wall portion on the rear end side is provided on the outer peripheral wall of the skin plate forming the shield body, and a backfilling material injection port is provided in the injection port wall portion, and a backfilling material injection port is provided in the protection tube. A spool that constitutes a pipe line and a cleaning water pipe line and that switches the opening and closing of the outlet of the backfilling material injection line is slidably inserted into the backfilling material injection port, and a sliding operation means is attached to a rod connected to the spool. By protruding and retracting the rod, communication between the outlet of the backfilling material injection pipe and the backfilling material injection port, and communication between the washing water pipe and the outlet of the backfilling material injection pipe are switched. In the backfilling material injection device for a shield excavator, the inlet of the backfilling material injection pipe is connected to a backfilling material supply pipe provided with a first solenoid valve,
The washing water pipe is connected to a washing water pipe having a second solenoid valve, and the washing water discharge pipe having a third solenoid valve is connected to the first solenoid valve outlet side of the backing material supply pipe. , a first detector for detecting a retracted position of the rod and a second detector for detecting an extended position of the rod are provided, and when a detection signal is output from the first detector, a first electromagnetic valve is opened; The second solenoid valve and the third solenoid valve are closed, and when a detection signal is output from the second detector, the first solenoid valve is closed and the second solenoid valve and the third solenoid valve are opened. A backfilling material injection device for a shield excavator featuring: