JP2596918Y2 - Backing material mixing and injection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION A backing material mixing / injecting apparatus according to the present invention comprises a cylinder formed by assembling an arc-shaped cement material (segment) when excavating underground by a shield method to form a tunnel; A two-liquid type rapidly solidifying backing material is injected between the newly excavated and the exposed inner surface of the soil (backing gap) to prevent collapse of the excavated inner surface of the soil by the cylinder formed by the segment. Used to form the tunnel cross-section as designed.

[0002]

2. Description of the Related Art A backing material of a mixed type of the above two liquids is a liquid A (mortars) and a liquid B (water glass and other coagulation accelerators, which are used as equipment). The coagulation time varies depending on the amount of this used.).

[0003] The inventor of the present invention mixes the solution A and the solution B immediately before injection and discharges the mixed solution into the back gap, so that the backing material in which the two solutions are mixed can be extended to the back gap by using a long pipe. Backing material mixing / injecting device that does not need to be sent (Japanese Utility Model 4-551)
No. 14) was devised.

A first embodiment of this prior art device will be briefly described with reference to FIG.
And the flexible tube 4 is inserted through the guide tube 3.
The flexible tube 4 can be moved in the outer tube 1 together with the guide tube 3 and the movable tube 2 by the hydraulic cylinder 5. A nozzle tube 6 is connected to the right end (left and right according to FIG. 9) of the flexible tube 4 and connected to the left end.
The liquid B sent from the liquid pipe 7 flows out of the nozzle cylinder 6 into the outer cylinder 1. A discharge pipe 8 is attached to the right end of the outer cylinder 1, and A is sent from an A liquid pipe joint 9 attached to the side of the movable cylinder 2.
The liquid and the above liquid B are mixed in front of the discharge pipe 8 and injected from the discharge pipe 8 into the back gap. On the side surface of the outer cylinder 1, a B liquid pipe 7,
A long hole is formed to make the A liquid pipe joint 9 movable.

[0005] When the backing material injection is completed, the movable cylinder 2 is moved rightward in FIG. 9 by the hydraulic cylinder 5, and the valve 10 provided on the guide pipe 3 becomes a valve seat formed at the base of the discharge pipe 8. 11
The water pipe joint 12 attached to the outer cylinder 1
, Water is poured into the outer cylinder to wash a small amount of the remaining mixture. The washed water was supplied to the A liquid pipe joint 9 with the A liquid pipe removed.
Is discharged from As shown in FIG. 7 showing the embodiment of the present invention, this injection device is used by attaching a part of the casing to a cut-out portion on the outer surface of the rear part of the casing 37 of the excavator and piping from inside the casing.

FIG. 10 shows a second embodiment of the present invention which is a modification of the apparatus of FIG. The same parts as those in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

[0007] A mixing tube 39 is connected to the distal end of the guide tube 3. The outer end of the mixing cylinder 39 is closed, and an opening 3
9a has been established. The mixing cylinder 39 is connected to the outer cylinder 1.
An opening 8a that overlaps with the opening 39a of the mixing cylinder is formed on a side surface of the discharge pipe 8 into which the nozzle 8 is fitted. A packing 40 is provided between the tip of the mixing cylinder 39 and the inner surface of the discharge pipe 8.

FIG. 10 shows a state when the backing material is injected. In this state, the A liquid sent from the A liquid pipe joint 9 into the movable cylinder 2 enters the mixing cylinder 39 through the opening 39a, and mixes with the B liquid ejected from the nozzle cylinder 6 to form the opening 39.
a, 8a.

The mixing cylinder 39 is moved to the outer cylinder 1 by the hydraulic cylinder 5.
When retracted, the packing 40 moves to the dashed line position,
The inside of the mixing cylinder 39 is not communicated with the outside. Mixing cylinder 39 instead
The inside communicates with the water pipe joint 12, the movable cylinder 2, and the outer cylinder 1. Water sent from the joint enters the mixing cylinder 39 through the opening 39a, and the backing material remaining in the mixing cylinder is removed. The water that has been washed and washed is discharged from the A liquid pipe junction 9 to which the A liquid pipe has been removed and a drain pipe has been connected.

[0010]

[Problems to be Solved by the Invention] While the backing material injecting operation is being continued, for example, a power failure or other trouble occurs, and the injection cannot be continued in a state where the two-liquid mixed material remains in the injecting device. In such a case, an obstacle occurs that the backing material is solidified in the apparatus. In such a case, the above-mentioned invented injection device requires that the entire injection device be removed from the outer surface of the casing of the excavator and disassembled and cleaned.
During that time, excavation work must be stopped. This operation takes a lot of time.

According to the present invention, washing after use can be efficiently performed, and even if the backing material is solidified in the apparatus, necessary parts of the apparatus can be easily removed and the function can be quickly restored. This is the structure obtained.

[0012]

According to the present invention, a liquid A and a liquid B are filled in an injection pipe vertically supported in a cover via a support cylinder.
The liquid is mixed, and with the discharge port opened on the side of the injection pipe exposed outside the support cylinder, the mixed liquid is injected into the back gap from this discharge port, and the injection pipe is pulled into the support cylinder. A through hole is provided in the support cylinder at a position that matches the discharge port when
A water pipe is connected to this through-hole to constitute a backing material mixing / injection apparatus, and only an injection pipe can be taken out from a working hole opened in an excavator casing.

[0013]

Since the solution A and the solution B are mixed in a narrow space of the injection tube, it is easy to wash this portion.

If the injection tube is formed by connecting a plurality of tubes, it is easy to remove the tube portion when a failure occurs.

[0015]

1 to 8 show an embodiment of the injection device of the present invention. FIG. 1 is a bottom view of a partially cut-off half, FIG. 2 is a bottom view of another half, and FIG. 1 is a sectional view taken along the line AA (some piping is omitted), FIG. 4 is a sectional view taken along the line BB of FIG. 2, FIG. 5 is a right end view of FIG. 1, and FIG. , FIG. 7 is a schematic cross-sectional view of a tunnel showing a state where it is attached to an excavator, and FIG. 8 is an enlarged vertical cross-sectional view of an inner pipe of an injection pipe formed by connecting short pipes.

The cover 14 has a semicircular cross section.
Both ends are closed by end walls 15 and 16 and a buffer wall 17. A support cylinder 19 is provided so as to be supported by a right end wall 15 (the left and right sides are shown in FIGS. 1 to 4 and the same applies hereinafter) and a partition wall 18 close thereto, and an injection pipe 20 is liquid-tightly and slidably mounted on the support cylinder 19. Fit freely. The injection tube 20 is formed by fitting an outer tube 20a and an inner tube 20b, and the inner tube 20b may be a single tube. In this embodiment, however, the short tubes 38a, 38b, 3
8c is screw-connected. Outer tube 20a, inner tube 2
The flanges 20c and 20d are respectively formed on the left end of the movable body 0b, and the flanges 21a of the A liquid pipe 21 are overlapped with each other to form a protruding wall 22 of a movable body 22 movable within the cover 14.
bolted to a. The moving body 22 is connected to a rod 24a of a hydraulic cylinder 24 having a left end connected to a protruding wall 23 formed on the left inner surface of the cover 14 and is movable. With this movement, the injection pipe 20 moves the support tube 19 The inside is slid and the right end is retracted into the support tube 19 as shown in FIG. 1 or protruded from the support tube 19 as shown in FIG.

A through hole 25 is formed in a side surface of the support cylinder 19, and a water pipe 26 communicates with the through hole 25. When the injection pipe 20 is pulled into the support cylinder 19 and the cover 14 as shown in FIG. 1, a through hole 27 is formed in the injection pipe 20 through the inner and outer pipes 20a and 20b at a position corresponding to the through hole 25. Have been. Reference numeral 28 denotes a pin inserted into the outer tube 20a so that the through holes formed in the inner and outer tubes 20a and 20b do not differ, and a recess at the end of the inner tube 20b is engaged with the pin. A guide piece 29 having a guide protrusion 29a is fitted to the right edge of the through hole 27 of the inner tube 20b.

A liquid B pipe joint 30 is attached to a side surface of the liquid A pipe 21, and a liquid B pipe 31 and a liquid B hose 32 provided concentrically inside the liquid A pipe 21 are connected. At the right end of the B liquid pipe 31, a B liquid nozzle 33 is attached. Liquid B hose 32, water hose 34 connected to water pipe 26, liquid A hose 3 connected to liquid A pipe 21
5 and a hydraulic oil pipe 36 for supplying and discharging hydraulic oil to and from the hydraulic cylinder 24
Is guided to the left end portion of the cover 14 and is guided downward in FIG. 4 through a joint (not shown), and is guided into the excavator casing through the pipe through hole 37a of the casing 37 of the excavator. Connected to pump. A working hole 37b is opened in the excavator casing 37 in the lower part of the A liquid pipe 21.

This injection device, as shown schematically in FIG.
Usually, two sets are attached to the upper part of the casing 37 of the excavator, and the backing material is discharged in the circumferential direction of the casing 37 by mixing the liquid A and the liquid B to fill the backing gap.

The operating state of the injection device is as follows.

1) When filling the backing material, the rod 24a of the hydraulic cylinder 24 is pushed out to move the injection pipe 20 rightward through the moving body 22, and the through hole 27 of the injection pipe 20 is inserted as shown in FIG. It is exposed from the end wall 15 of the cover. In this state, the through hole 25 of the support cylinder 19 is closed by the injection pipe wall.

In this state, the B liquid hose 32 and the A liquid hose 3
When each of the liquids is pressure-fed from the liquid 5, the liquid B discharged from the liquid B nozzle 33 and the liquid A flowing around the nozzle are injected into the injection pipe 2.
In the injection pipe, the water is mixed in the injection pipe 27 and is injected into the back gap from the through hole 27.

[0023] 2) Once finished the Urakomi material injection, FIG. 1 the injection tube 20 retracted the rod 24a to the left in the oil feed to the hydraulic cylinder 24, a state of FIG. Thereby, the injection pipe 2
Since the through hole 27 of the zero coincides with the through hole 25 of the support cylinder 19,
Cleaning water is injected into the injection pipe 20 from the water pipe 26. Press-fitted into the injection tube water flows to the nozzle 33 side of the left for inducing projections 29a, washed the mixture injection tubes, washed finished water is Ri through the tube for feeding the liquid A, this Wash the liquid A in the tube
Purified and discharged. Since it is sufficient to clean only a narrow space in the injection tube 20, the cleaning is easy, and can be performed quickly and well.

3) If the backing material cannot be injected during the operation due to a power failure or a failure of other equipment, and the mixed solution is solidified in the injection pipe, the case 14 is replaced with the excavator casing. With the hand attached through the working hole 37b of the excavator casing, the hoses 32 and 35 are connected to the B
1. Remove from liquid A pipe 21 and remove flanges 20c, 20d, 2
1a is removed from the bolt connecting the projecting wall 22a of the moving body 22 to remove the A liquid pipe 21, and then the injection pipe 20 is connected to the support cylinder 19
By pulling it out of the casing 37, the portion where the mixed solution is clogged and solidified can be taken out of the casing 37.

As shown in FIGS. 1 and 8, the inner pipe 20b of the injection pipe is used.
Is divided into a plurality of (for example, three) short tubes 38a, 38b, 38c, and is connected by screws, so that the injection tube can be more easily removed by sequentially removing the tubes from the left short tube. it can.

[0026]

[Effects of the Invention] 1) The liquid A and the liquid B are mixed and discharged only in the injection pipe 20, so that the space where both liquids are present is narrow. Therefore, mixing can be performed evenly, and washing after the backing work is easy and quick.

2) Even if an obstacle such as solidification of the backing material occurs in the injection pipe, the injection pipe filled with the solidified backing material can be easily removed while the apparatus is mounted on the excavator casing. The solidified backing material can be removed or replaced immediately with a spare fill pipe to allow the drilling operation to resume quickly.

3) When the short pipe is connected to form the injection pipe, the solidified backing material can be removed more efficiently.

[Brief description of the drawings]

FIG. 1 is a partially cutaway bottom view showing an embodiment of a backing material mixing / injecting apparatus of the present invention.

FIG. 2 is a bottom view of another half.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a right end view of the device.

FIG. 6 is a partial bottom view of the device showing a state where the injection tube is projected from the case.

FIG. 7 is a schematic cross-sectional view of a tunnel showing a state where the tunnel is attached to an excavator.

FIG. 8 is an enlarged longitudinal sectional view of an infusion tube inner tube configured by connecting short tubes.

FIG. 9 is a longitudinal sectional side view of the first embodiment of the backing material mixing / injecting device of the present invention.

FIG. 10 is a vertical sectional side view of a second embodiment of the backing material mixing and injection device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Movable cylinder 3 Guide pipe 4 Flexible pipe 5 Hydraulic cylinder 6 Nozzle cylinder 7 B liquid pipe 8 Discharge pipe 8a Opening 9 A liquid pipe joint 10 Valve 11 Valve seat 12 Water pipe joint 14 Cover 15, 16 End wall 17 Buffer Wall 18 Partition wall 19 Bearing tube 20 Injection tube 20a Outer tube 20b Inner tube 20c Inner tube flange 20d Outer tube flange 21 A liquid tube 21a Flange 22 Moving body 22a Projected wall 23 Projected wall 24 Hydraulic cylinder 24a Rod 25 Through hole 26 Water tube 27 Through hole 28 Pin 29 Guide piece 29a Guide protrusion 30 B liquid pipe joint 31 B liquid pipe 32 B liquid hose 33 B liquid nozzle 34 Water hose 35 A liquid hose 36 Pressure oil pipe 37 Excavator casing 37a Pipe through hole 37b Work hole 38a, 38b, 38c Short pipe 39 Mixing cylinder 39a Opening 40 Packing

Claims (2)

(57) [Scope of request for utility model registration] An injection pipe (20) through which a liquid A is sent through a flexible pipe is supported in a vertically movable cylinder (19) by a hydraulic cylinder (24) and provided in a cover (14). With the vertical movement of (20), the through-hole (2) exposed from the support tube (19) and out of the cover or hidden in the support tube (19).
7) is drilled on the side of the injection tube, and another through hole (25) is formed in the support tube (19) at a position corresponding to the through hole (27) of the injection tube when the injection tube is retracted into the support tube. A water pipe (26) is connected to the through-hole (25), a liquid B pipe (31) is inserted into the injection pipe from the side of the injection pipe (20), and the liquid A is injected into the injection pipe (20). A hose (35) for feeding, a hose (32) connected to the liquid B pipe for sending the liquid B thereto, a hose (34) for supplying water for washing to the water pipe (26), and a pressure oil pipe (pressure oil) for supplying pressurized oil to the hydraulic cylinder ( A backing material mixing / injecting device, wherein 36) is derived from the cover (14), and the cover (14) is freely attachable to an outer surface of a casing of an excavator having a pipe through hole and a working hole. 2. An injection pipe having a straight outer pipe (20a) and an inner pipe (20b) fitted to each other, and an inner pipe (20b).
2. The backing material mixing / injecting apparatus according to claim 1, wherein a plurality of short pipes having the same outer diameter are screwed together so as to be disassembled.