JPH0455114Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (industrial application field) When excavating underground using the shield method,
As the excavator advances, the molding material that defines the inner surface of the tunnel is assembled inside the tunnel, and a two-liquid mixed type rapid solidifying material is placed between the exposed inner surface of the freshly excavated soil and the molding material (backfilling space). Currently, a backfilling material is injected to prevent the inner surface of the excavated soil from collapsing, and to form a tunnel cross-section of the designed dimensions.

This invention uses A as a base material for rapid solidification.
A backfill material mixing and injection device that injects backfill material made by mixing liquid (mortar) and B liquid (water glass or other coagulation accelerator, the amount used is about 1/9 of A liquid) into the backfill space. This is an idea that can be used as a.

(Prior art) The conventional method is to inject a backfilling material, which is a mixture of liquid A, which is a base material, and liquid B, which promotes coagulation, into the backfill space.
The pipes for liquid A and liquid B are connected on a trolley installed at the rear of the excavator, and liquid A and B are mixed to create a backfilling material that solidifies quickly. It was designed to be pumped and filled into the backfilling space through piping leading to the backfill space.

(Problem that the invention aims to solve) Because of this structure, the length of the pipe from when both liquids A and B are mixed until they reach the backfilling gap is quite long, and the liquids passing through this pipe are quite long. Since it takes a long time to complete the process, consider the solidification time of the backing material and select A and B.
Although the mixing ratio of both liquids is determined, there is a risk that the backfilling material will stagnate and solidify in the piping due to slow excavation progress due to differences in geology, or emergency stoppage of excavation due to trouble.

B. Structure of the device (means for solving the problem) This device mixes both liquids A and B immediately before discharging,
A movable cylinder 14 that can be slid freely is fitted into the outer cylinder 1, and a liquid B nozzle is inserted into the guide tube 12, which is connected to the movable cylinder 14 and movable within the outer cylinder 1, so that it can be immediately filled into the backfill space. 11 and a B liquid pipe joint 5 attached to both ends of the flexible tube 6, and elastically fit the B liquid nozzle 11 into the opening at one end of the guide tube 12. The B liquid pipe joint 5 is brought into elastic contact with the flange 31 connected to the movable cylinder 14, and the B liquid pipe 9 is connected to the B liquid pipe joint 5 through the long side hole 8 provided in the outer cylinder 1. , the A liquid pipe joint 21 is attached to the movable cylinder 14 through another long side hole 22 of the outer cylinder 1, and the outer cylinder 1 is connected to the outer cylinder 1 where the B liquid nozzle 11 opens between the guide pipe 12 and the movable cylinder 14.
A hydraulic cylinder 2 for driving the movable cylinder 14 is attached to the end of the outer cylinder 1 opposite to the above, and the hydraulic cylinder 2 is connected to a cylindrical space that communicates only with the end of the B liquid nozzle 11.
Discharge pipes 18 and 25 are attached to the ends of the outer cylinder 1 where the guide pipe 12 is located, and valves 20 and 27 open and close communication between the inside of the outer cylinder 1 and the discharge pipes 18 and 25 as the guide tube 12 moves.
The above-mentioned problems have been solved by providing a backfilling material mixing and injection device equipped with the following.

(Function) Liquid A is pumped from the side of the outer cylinder 1 by a liquid A pump (not shown) into the cylindrical space between the movable cylinder 14 and the guide tube 12 in the center, and passes through this space.
It reaches the end of the outer cylinder 1, mixes with the B liquid ejected from the B liquid nozzle at this end, becomes a backfilling material, and is immediately discharged from the discharge pipes 18, 25 to the outside of the outer cylinder.

The B liquid is pumped by a B liquid pump (not shown) and enters the flexible tube 6 in the center of the outer cylinder from the side of the outer cylinder.
The liquid is ejected from the nozzle 11 at the center of the outer cylinder end and mixed with liquid A as described above.

Therefore, by opening the discharge pipes 18 and 25 into the back-filling space and discharging the back-filling material, the back-filling material immediately after mixing both liquids A and B can be filled into the back-filling space.

When discharging the backfilling material is to be stopped, pressure oil is sent to the hydraulic cylinder to move the flexible tube 6 on the center line of the outer cylinder 1 and close the valves 20 and 27. B before this valve closing
If you stop pumping the liquid and let only liquid A flow for a few seconds so that there is no backing material at the end of the outer cylinder, liquid B will disappear and there will be no need to worry about the backing material solidifying inside the outer cylinder. .

The remaining liquids A and B can be removed by cleaning.

FIG. 1 is a longitudinal sectional side view showing a first embodiment of the device of the present invention, and FIG. 2 is a longitudinal sectional side view showing a second embodiment.

First, a first embodiment will be explained with reference to FIG.

The hydraulic cylinder 2 is attached to the left end of the outer cylinder 1, which is closed by screwing the lid plate 29, and the oil pipes 2a, 2b are connected to the hydraulic cylinder 2.
The piston 3 in the cylinder is moved by supplying and discharging pressure oil from the cylinder, and the B liquid pipe is connected to the flange 31 that closes the left end of the connecting cylinder 17, which is connected via the flange 4 to the piston rod 30 that has entered the outer cylinder 1. With the joint 5 in contact with each other, the B liquid pipe joint 5 is moved left and right by the left and right movement of the piston 3. A flexible rubber tube 6 is connected to the joint 5 by a coupling 7, and a B liquid tube 9, which is movable left and right, is connected from the side through a long side hole 8 of the outer cylinder 1.

The right end of the flexible tube 6 is connected to a liquid B nozzle 11 via a coupling 10.

The B liquid nozzle 11 is removably attached to the inner surface of the right end of the guide tube 12 via a short tube 33 connected thereto, in which an O-ring 32 is fitted into an annular groove on the outer surface. Movable cylinder 1 via ring 13
4 is combined. The movable cylinder 14 is slidably fitted into the outer cylinder 1 via wear rings 15, 15 and an O-ring 16, and is coupled to the flange 4 via a connecting cylinder 17 by a flange 31 at its left end. Therefore, the movable cylinder 14 slides from side to side within the outer cylinder 1 as the piston 3 moves.

A flange 18a at the base of the discharge pipe 18 is screwed onto the right end of the outer cylinder 1. A tapered valve seat 19 is formed on the flange 18a, and when the valve 20, which is fixed to the outer surface of the guide pipe 12 that moves to the right together with the movable cylinder 14, comes into contact with the valve seat 19, the inside of the outer cylinder 1 and the discharge pipe 18 are connected. communication is cut off.

A liquid pipe joint 21 is attached to the side surface of the movable cylinder 14, and the outer cylinder 1 is attached so that the movable cylinder 14 can move left and right.
A long side hole 22 is formed in the hole. 23 is a water pipe joint attached to the right end of the outer cylinder 1 to send washing water.

Since the structure is as described above, the hydraulic cylinder 2
Supply oil from the oil pipe 2b to move the piston 3 to the left,
When the guide tube 12 and movable tube 14 are moved to the left via the connecting tube 17 and the valve 20 is separated from the valve seat 19, this mixing injection device mixes liquids A and B and is in a state where they can be discharged, as shown in FIG. becomes.

Therefore, when liquid A is pumped into the movable cylinder 14 from the liquid A pipe attached to the liquid A joint 21, liquid A flows to the right through the cylindrical space between the movable cylinder 14 and the guide tube 12, and the liquid B flows to the right. The liquid B, which is forced to the right through the flexible tube 6 from the tube 9, is mixed with the liquid B at the right end of the outer cylinder 1, and is discharged through the discharge tube 18 as a backfilling material.

Therefore, if the opening of the discharge pipe 18 is directly inserted into the backfill gap and the backfill material is discharged, the backfill material will be mixed,
It can be immediately injected and filled into the backfill space.

Next, oil is supplied from the oil pipe 2a to move the piston 3 to the right, and the movable cylinder 14 is connected to the guide pipe 1 via the connecting cylinder 17.
2 to the right, the valve 20 comes into contact with the valve seat 19 and blocks communication between the inside of the outer cylinder 1 and the discharge pipe 18.

Before the communication is cut off by the valve 20, the pressure feeding of the B liquid is stopped, and after the A liquid is discharged for a short period of about several seconds, the guide pipe 12 is moved to the right and the communication is cut off by the valve 20. All of the backfilling material that was present at the right end of the inside of the cylinder 1 and inside the discharge pipe 18 is discharged and no longer remains inside the outer cylinder or the discharge pipe. Even when backfilling work is stopped due to work stoppages or problems with the excavator, this treatment will prevent the backfilling material from solidifying inside the outer cylinder or discharge pipe, which will interfere with subsequent backfilling work. It never happens.

When the valve 20 is opened and the washing water is pumped through the water pipe joint 23, the remaining liquid A can be washed and discharged.

To remove the flexible tube, pull out the B liquid tube joint 5, which is in elastic contact with the flange 31 due to the elasticity of the flexible tube 6, from the side hole 8 of the outer cylinder together with the left end of the flexible tube 6, and remove the flexible tube. When the left end of the tube is pulled out from the side hole 8, the right end is pulled out by pulling the liquid B nozzle 11, which is coupled to this with a coupling 10 and fitted into the step at the right end of the guide tube 12 with an O-ring 32. The entire flexible tube can be taken out of the outer cylinder 1 through the side hole 8.

To install the flexible tube 6, attach the B liquid nozzle 11, insert the right end of the flexible tube into the guide tube 12 from the side hole 8, push it to the right until it reaches the right end of the guide tube, and then tighten the O-ring 32. It is elastically fitted into the stepped portion at the right end of the guide tube through the guide tube. Thereafter, the B liquid pipe joint 5 at the left end of the flexible tube is put into the connecting tube 17, and brought into contact with the flange 31 as shown in FIG. 1 by the elasticity of the flexible tube. The left end of the guide tube 12 is flared to make it easier to insert the flexible tube.

Next, a second embodiment shown in FIG. 2 will be described.
The same reference numerals are used for the same parts as those of the first embodiment shown in FIG. 1, and the explanation thereof will be omitted, and only the different parts will be explained.

The second embodiment has a different structure of the discharge part,
Piston 3 in which the opening and closing of the discharge pipe is in the opposite direction compared to the first embodiment
It is performed with the movement of

In FIG. 2, a nozzle tube 24 is attached to the right end of the guide tube 12, and a discharge pipe 25 is attached to the right end of the outer tube 1. The right end of the nozzle cylinder 24 is closed, and an opening 26 is formed in the side wall, and an annular valve 27 attached to the tip is slid on the inner surface of the discharge pipe 25 to open the parts of the discharge pipe 25 on the left and right of the valve 27. It is possible to cut off the flow of liquid. Discharge pipe 2
An opening 28 is formed in the side wall of 5.

With this configuration, the hydraulic cylinder 2 pushes the movable cylinder 14 to the right to change the state of each part to the second state.
As shown in the figure, liquid A press-fitted into the movable cylinder 14 through the liquid A pipe joint 21 enters the nozzle cylinder 24 through the left part of the opening 26, and the flexible pipe 6, B
B flowing into the nozzle cylinder 24 through the liquid nozzle 11
It mixes with the liquid, becomes a backfilling material, and is discharged out of the apparatus through the right part of the opening 26 and the opening 28.

When the piston of the hydraulic cylinder 2 is reversely driven to move the nozzle cylinder 24 to the left via the movable cylinder 14 and the guide cylinder 12, and the annular valve 27 is moved to the chain line position, the opening 28 of the discharge pipe 25 and Communication with the inside of the outer cylinder 1 is cut off. Therefore, by operating as in the first embodiment, the backfilling material mixed with liquids A and B was poured into the nozzle tube 24.
The end of the outer tube 1, the cylindrical space between the movable tube 14 and the guide tube 12, the discharge tube 25, the nozzle tube 24, etc. can be washed with cleaning water.

C. Effect of the invention 1 Liquids A and B flow individually through many parts of the device, mix at the end of the outer cylinder to become a backfilling material, and are immediately discharged, so they can be backfilled into the device. There is less risk of material remaining and solidifying.

2. When stopping the injection device, operate the hydraulic cylinder 2 and control the supply of liquids A and B.
Since all of the backing material can be easily discharged to the outside of the outer cylinder so that it does not remain inside the outer cylinder, there is no problem of solidification of the liquid mixture inside the outer cylinder.

3. The backfilling material can be injected and filled into the backfilling gap directly from the discharge pipe of the injection device without passing through a long pipe, so there is no problem of solidification of the mixed liquid inside the pipe.

4. Since the flexible liquid B injection tube can be easily attached and detached manually, the liquid B nozzle 11 can be easily cleaned.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional side view of the first embodiment, and FIG. 2 is a longitudinal sectional side view of the second embodiment. 1...Outer cylinder, 2...Hydraulic cylinder, 2a, 2b
... Oil pipe, 3 ... Piston, 4 ... Flange, 5
... B liquid pipe joint, 6 ... Flexible tube, 7 ... Coupling, 8 ... Side hole, 9 ... B liquid pipe, 10 ...
...Coupling, 11...B liquid nozzle, 12...
Guide tube, 13... ring, 14... movable tube, 15...
Wear ring, 16...O ring, 17...Connecting cylinder, 18...Discharge pipe, 18a...Flange, 19
... Valve seat, 20 ... Valve, 21 ... A liquid pipe joint, 22 ... Side hole, 23 ... Water pipe joint, 2
4... Nozzle tube, 25... Discharge pipe, 26... Opening, 27... Valve, 28... Opening, 29... Cover plate,
30... Piston rod, 31... Flange, 3
2...O-ring, 33...short tube.

Claims (1)

[Scope of utility model registration request] A slidable movable cylinder 14 is fitted into the outer cylinder 1, and a B liquid nozzle 11 and a B liquid pipe joint 5 are inserted into a guide tube 12 that is connected to the movable cylinder 14 and is movable within the outer cylinder 1. The flexible tubes 6 attached to both ends are inserted, the B liquid nozzle 11 is elastically fitted into the opening at one end of the guide tube 12, and the B liquid nozzle 11 is positioned within the opening at one end of the outer cylinder 1, and the B liquid pipe joint 5 is inserted. is brought into elastic contact with the flange 31 connected to the movable cylinder 14, the B liquid pipe 9 is connected to the B liquid pipe joint 5 through the long side hole 8 provided in the outer cylinder 1, and the A liquid pipe joint 21 is connected to the outside. Cylinder 1
It is attached to the movable cylinder 14 through another long side hole 22 of the guide tube 12 and the movable cylinder 14, and communicates with the cylindrical space that communicates only with the end of the outer cylinder 1 where the B liquid nozzle 11 opens, and the above-mentioned The hydraulic cylinder 2 for driving the movable cylinder 14 is attached to the end of the outer cylinder 1 on the opposite side, the discharge pipes 18 and 25 are attached to the end of the outer cylinder 1 where the B liquid nozzle 11 is located, and the guide pipe 12 A backfilling material mixing and injection device is provided with valves 20 and 27 that open and close communication between the inside of the outer cylinder 1 and the discharge pipes 18 and 25 as the material moves.