JPH084485A - Screw conveyor of shield excavating machine - Google Patents

Abstract

PURPOSE:To improve the soil/sand taking-in efficiency by projecting the flight of a screw conveyor forward from a bulkhead. CONSTITUTION:On a bulkhead for longitudinally partitioning the inside of a shield frame, a pipe which forms the outer contour of a screw conveyor 12 is installed, through the communication between a soil/sand taking-in chamber at the front and a coal pit at the rear, and a rotary shaft 14 is installed along the axial direction in a pipe. A soil/sand sending flight 15 which is formed in a spiral form is installed on the rotary shaft 14, and a part of the flight 15 is cut in the circumferential direction of the pipe, and an intermediate gate 16 for opening and closing the inside of the pipe is installed in correspondence with the cut part. Further, the end part 15x of the soil/sand taking-in chamber side of the flight 15 is projected to the inside of the soil/sand taking-in chamber at the front from the bulkhead.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw conveyor for a shield machine having a gate for closing the inside of a conveyor pipe to stop water when disassembling the screw conveyor.

[0002]

2. Description of the Related Art An outline of a shield machine is shown in FIG. As shown in the figure, a partition wall d that divides the inside into a sand intake chamber b and a pit c is formed inside a cylindrical shield frame a, and a cutter e for excavating a cutting face is formed in front of the partition wall d.
Is rotatably provided, and the earth and sand excavated by the cutter e are discharged from the earth and sand intake chamber b to the underground c via the screw conveyor f. The screw conveyor f has a sand / sand feeding flight h formed in a spiral shape along an axial direction in a pipe g forming an outer shell thereof, and transports the sand / sand by rotationally driving the flight h by a motor (not shown). To do.

By the way, in the ground where gravel and the like are mixed, there is a case where the flight h cannot be rotated because the screw conveyor f is clogged with gravel. In such a case, it is necessary to disassemble the screw conveyor f to remove the gravel inside, but since the earth pressure of the cutting face is applied in the earth and sand intake chamber b, if the screw conveyor f is simply removed, it is taken in from that portion. The earth and sand in the chamber b will be jetted into the mine c. Therefore, an opening / closing gate i is provided at the tip of the screw conveyor f, and after closing the opening / closing gate i, the screw conveyor f
I am trying to remove it.

[0004]

However, when the opening / closing gate i is provided at the tip of the screw conveyor f as described above,
Since the flight h cannot be projected into the sediment collection chamber b in front of the partition wall d, the sediment collection efficiency is deteriorated.
Further, the opening / closing device for operating the opening / closing gate i is attached to the back surface of the partition wall d, but since the cutter driving device j, the shield jack k, etc. are provided on the back surface of the partition wall d, the space is narrow. However, there is a case where the gate opening / closing device cannot be installed due to the space with the cutter driving device j and the like.

Incidentally, instead of providing the opening / closing gate i, there is also known a method of injecting cement, water glass or the like or a grout material (solidifying material) into the screw conveyor f and the earth and sand intake chamber b to harden the earth and sand inside. In this case,
If the injection rate of the grout material is too small, the water blocking will be incomplete, and if it is too large, there will be a problem that the water cannot be restored.

An object of the present invention, which was devised in view of the above circumstances, is to provide a screw conveyor for a shield machine, which can make the flight of the screw conveyor forward of the partition wall and improve the efficiency of taking in earth and sand. To provide.

[0007]

In order to achieve the above object, a first aspect of the present invention is directed to a screw conveyor in which a partition wall for partitioning the inside of a shield frame into front and rear is communicated with the earth and sand intake chamber in the front thereof and the mine in the rear thereof. In a screw conveyor of a shield machine having a pipe forming an outer shell of the shield machine, a rotary shaft being provided in the pipe along the axial direction thereof, and a spiral sand transporting flight being provided on the rotary shaft. Is cut out in the circumferential direction of the pipe, an intermediate gate for opening and closing the inside of the pipe is provided by matching with the cutout, and the end of the flight on the side of the sand intake chamber is taken in front of the partition wall. It is configured to protrude into the room.

A second aspect of the present invention rotatably supports a spherical shield frame having a cutter for excavating a face in a front portion inside a cylindrical outer shield frame, and the spherical shield frame is rotated to remove the cutter. In a shield machine that exposes the inside of the mine and replaces the cutter bit, the cutter mounting surface of the spherical shield frame is connected to the earth and sand intake chamber in the front and the inside of the mine in the rear, and the outer shell of the screw conveyor is connected. A pipe is provided, a rotary shaft is provided in the pipe along the axial direction, and a spiral sand transport flight is provided on the rotary shaft, and a part of the flight is cut out in the circumferential direction of the pipe. An intermediate gate that opens and closes the inside of the pipe by matching the cutout is provided, and the end of the flight on the side of the sand intake chamber is located in the sediment intake chamber in front of the cutter mounting surface. And it is configured so issued.

[0009]

According to the first aspect of the present invention, the flight of the screw conveyor is partially cut away, and the intermediate gate is provided in the middle of the screw conveyor. It can be projected into the intake chamber, and the efficiency of soil and sand intake is improved.

According to the second aspect of the invention, when the screw conveyor becomes clogged with gravel or the like and the flight cannot be rotated, the intermediate gate is closed and the screw conveyor behind the intermediate gate is removed and disassembled. Remove the gravel, etc., that has clogged the conveyor.

Gravels and the like stuck in the screw conveyor in front of the intermediate gate can be safely removed from the inside of the mine by rotating the spherical shield frame with respect to the outer shield frame and exposing the cutter inside the mine. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first invention will be described with reference to FIG.

As shown in the drawing, a partition wall 4 is provided in the cylindrical shield frame 1 to partition the inside into a sand and sand intake chamber 2 and a downhole 3. On the front surface of the partition wall 4, a cutter 5 for excavating a face is rotatably provided via an intermediate beam 6. As the cutter 5, a spoke-shaped one or a disc-shaped one is used depending on the soil quality of the ground. A plurality of intermediate beams 6 are arranged at predetermined intervals in the circumferential direction of the cutter 5, one end of which is fixed to the cutter 5 and the other end of which is fixed to a ring plate 7 rotatably supported by the partition wall 4. There is.

The ring plate 7 is rotatably supported by the partition wall 4 via a bearing 8, and an external gear 9 is provided at the rear portion thereof. A pinion 11 of a drive motor 10 attached to the back surface of the partition wall 4 is meshed with the external gear 9. According to this configuration, when the drive motor 10 is driven, the rotation of the pinion 11 is transmitted to the cutter 5 via the external gear 9, the ring plate 7, and the intermediate beam 6, and the cutter 5 rotates.

The partition wall 4 is provided with a sediment intake chamber 2 in front thereof.
A screw conveyor 12 for communicating the excavated earth and sand in the earth and sand intake chamber 2 into the mine 3 by connecting the mine 3 and the rear mine 3 to each other.
Is provided. The screw conveyor 12 includes a pipe 13 that connects the earth and sand intake chamber 2 to the rear mine 3 and a rotary shaft 14 provided in the pipe 13 along the axial direction thereof.
And a flight 15 for earth and sand transportation spirally attached to the rotating shaft 14.

The essential parts of the screw conveyor 12 are shown in FIGS. 3 and 4. As shown in the figure, a part of the flight 15 is cut out along the circumferential direction of the pipe 13, and an intermediate gate 16 for opening and closing the inside of the pipe 13 is provided in conformity with the cutout 15a. As a result, flight 15
Although the cutout portion 15a is lacking by the thickness of the intermediate gate 16, the lacking interval is not so great that the sediment transport capability does not significantly decrease.

The intermediate gate 16 is composed of a pair of flat plates 16a and 16b which are divided into two parts on the left and right sides. Each flat plate 16
Recesses 17 are formed at the tips of a and 16b so as to avoid the rotary shaft 14 of the screw conveyor 12. Recess 17
Has a taper-shaped zag on the upstream side in the earth and sand transport direction, and a resin material or the like that enhances the sealing property is attached to the tip thereof. In addition, the flat portions 16a and 16b are provided with a concavo-convex portion that fits with each other in the contact portion other than the concave portion 17 to enhance the sealing property when closed. Each flat plate 16a, 1
6b is normally housed in a cover 18 provided on the left and right of the outer peripheral portion of the pipe 13. The cover 18 has
An opening / closing device 19 for opening / closing the flat plates 16a, 16b is provided.

The opening / closing device 19 includes two screw rods 2 attached to the end faces of the flat plates 16a and 16b and penetrating the cover 18.
0, a screw feed nut 21 rotatably provided in a penetrating portion of the cover 18 and screwed with each screw rod 20, a driven gear 22 integrally provided on each screw feed nut 21, and between each driven gear 22. A drive gear 23 that is rotatably provided on the cover 18 of the drive gear 23 and meshes with each driven gear 22, a ring-shaped handle 24 that is integrally provided on the drive gear 23, and a handle 2
4 and a handle 25 mounted vertically.

According to this structure, when the drive gear 23 is rotated by the handle 24 and the handle portion 25, the left and right driven gears 22 rotate in the same direction, the screw feed nut 21 rotates, and the two screw rods 20. Is screw fed. As a result, each flat plate 16a attached to the tip of the screw rod 20,
16b can be opened / closed (closely moved). The flat plates 16a and 16b project into the pipe 13 when the flat plates 16a and 16b move in the closing direction, but there is no problem because the flight 15 is provided with the notch 15a in conformity with the projecting position.

The pipe 13 can be divided before and after the intermediate gate 16. More specifically, the pipe 13 is cut back and forth on the surface of the cover 18 on the wake side in the earth and sand transfer direction, and the rear pipe 13b is detachably attached to the front pipe 13a by bolts 26. That is, the flange 2 is provided at the end of the rear pipe 13b.
7 is formed, the bolt 26 is inserted into the fool hole of the flange 27, and the bolt shaft portion has the front pipe 13a.
The cover 18 is screwed into the screw hole. Incidentally, reference numeral 28 in the drawing denotes a reinforcing rib.

The rotary shaft 14 and the flight 15 in the rear pipe 13b can be divided into front and rear in the axial direction.
More specifically, a rectangular recess 29 is formed at the end of the divided front rotation shaft 14a, and the projection 30 formed at the end of the rear rotation shaft 14b fits into this recess 29. It has become. Then, the front rotation shaft 14a is connected by the joining bolt 31 penetrating the concave portion 29 and the convex portion 30.
And the rear rotation shaft 14b are connected. On the other hand, the flight 15 includes the end of the front rotary shaft 14a and the rear rotary shaft 14b.
Has been cut at the end of. In addition, the cut portions 32 of both the cut flights 15 may be formed in a concavo-convex shape along the radial direction and mesh with each other like a chuck to enhance meshing rigidity.

The operation of this embodiment having the above configuration will be described.

Since the flight 15 of the screw conveyor 12 is provided with the cutout portion 15a and the intermediate gate 16 is provided in the middle of the screw conveyor 12, as shown in FIG. 7, the end portion 15x of the flight 15 on the earth and sand intake chamber 2 side is provided. Can be projected into the earth and sand intake chamber 2 in front of the partition wall 4 (the tip of the pipe 13), and the efficiency of earth and sand intake can be improved.

When the flight 15 cannot rotate due to clogging of the screw conveyor 12 and the like, the intermediate gate 16 is closed by the handle 24 and the handle portion 25 to stop water, and then the rear pipe 13b and Rear rotary shaft 1
Remove 4b. Then, the gravel and the like clogged in the rear pipe 13b are removed.

When gravel or the like is clogged in the front pipe 13a, a grout material (solidifying material) such as water glass is injected into the earth and sand intake chamber 2 and the face to solidify the earth and sand, and then the front pipe. It is sufficient to remove 13a from the partition wall 4 and remove the gravel and the like inside.

An embodiment of the second invention will be described with reference to FIGS.

FIG. 1 is a vertical sectional view of a so-called Krun shield machine 33, and FIG. 2 is a horizontal sectional view thereof. As shown in the figure, the Krung shield excavator 33 rotatably supports a spherical shield frame 36 having a cutter 35 for face cutting in a front portion inside a cylindrical outer shield frame 34, and the spherical shield frame 36 is supported by the spherical shield frame 36. The cutter bit 37 is rotated to expose the cutter 35 to the inside of the pit and the cutter bit 37 is replaced (see FIGS. 5 and 6).

Above and below the outer shield frame 34,
The pins 38, which are the rotation axes of the spherical shield frame 36, are fixed. A pinion gear 39 is rotatably inserted through these pins 38. Each pinion gear 39 is integrally fixed to the spherical shield frame 36, and a rack 41 extended from the rack extension jack 40 meshes with it. According to this configuration,
By extending the rack extension jack 40 and engaging the rack 41 with the pinion gear 39, the spherical shield frame 36 rotates about the pin 38 as a rotation axis with respect to the outer shield frame 34.

On the front surface 44 of the spherical shield frame 36, a cutter 35 for excavating a face is provided. That is, the rotary shaft 42 of the cutter 35 is provided on the front surface 4 of the inner cylinder 43 that slides in the spherical shield frame 36 in the axial direction.
4 is supported by the cutter motor 45, pinion 4
6. The external gear 47 is rotated. The cutter 35 is a katas pork 4 that expands and contracts in the radial direction.
Eight. Each of the cutas pork 48 is configured to contract to the same diameter as the inner cylinder 43 by an expansion jack 49 provided therein.

One end of the inner cylinder 43 is the front surface 4 of the inner cylinder 43.
The slide jack 50 is fixed to No. 4 and the other end is fixed to the rear portion of the spherical shield frame 36 so as to slide (see FIG. 5). It goes without saying that the Cattus pork 48 is contracted during the sliding movement. By this sliding movement, the cutter 35 is housed in the spherical shield frame 36.

The cutter mounting surface of the spherical shield frame 36, that is, the front surface 44 of the inner cylinder 43, communicates with the earth and sand intake chamber 51 in the front thereof and the pit 52 in the rear thereof, and forms the outer wall of the screw conveyor 12 with the pipe 13. Is provided. In the pipe 13, a rotary shaft 14 is provided along the axial direction.
Is provided, and the rotary shaft 14 is provided with a sand-transporting flight 15 formed in a spiral shape. The rotary shaft 14 and the flight 15 are rotatably driven by a conveyor motor 53 provided at the rear end of the screw conveyor 12.

The screw conveyor 12 is shown in FIG.
Further, as shown in FIG. 4, a part of the flight 15 is cut out in the circumferential direction of the pipe 13, and an intermediate gate 16 for opening and closing the inside of the pipe 13 is provided in conformity with the cutout 15a. The intermediate gate 16 is exactly the same as that described in the previous embodiment, so a detailed description thereof will be omitted. In addition, the end portion 15x of the flight 15 on the side of the earth and sand intake chamber 51
Is projected into the earth and sand intake chamber 51 in front of the cutter attachment surface 44.

The operation of this embodiment having the above configuration will be described.

Since the flight 15 of the screw conveyor 12 is partially cut out and the intermediate gate 16 is provided in the middle of the screw conveyor, the end 15x of the flight 15 on the side of the earth and sand intake chamber 51 is located in front of the cutter mounting surface 44. It can be projected into the earth and sand intake chamber 51, and the efficiency of earth and sand intake can be improved.

When the flight 15 becomes unrotatable due to gravel clogging in the screw conveyor 12, the intermediate gate 16 is closed and the screw conveyor 12 behind the intermediate gate 16 is removed and disassembled. 1
2. Remove the gravel, etc. stuck in 2. That is, the rear pipe 13b and the rear rotary shaft 14b of the screw conveyor 12 are removed as shown in FIG. 3, and the rear end of the rear pipe 13b is moved to the conveyor drive motor 5 as shown in FIG.
Remove from 3 and remove the gravel, etc. stuck inside.

When the screw conveyor 12 in front of the intermediate gate 16 is clogged with gravel or the like, the spherical shield frame 36 is further rotated with respect to the outer shield frame 34 to expose the cutter 35 in the pit. Inside the mine 5
It can be safely removed from the 2 side. That is, FIG.
From the state shown in (1), first, the Kattus pork 48 is contracted by the telescopic jack 49. Then, the inner cylinder 43 is slid backward by the slide jack 50, and the contracted cutter 35 is housed in the spherical shield frame 36 to obtain the state of FIG.

Then, the spherical shield frame 36 is rotated by the rack extension jack 40, and the cutter 35 is inverted as shown in FIG. At this time, the spherical shield frame 36 is supported by the front seal 56 and the rear seal 57 of the front partition 54 and the rear partition 55.
Then, the lid of the manhole 58 provided on the rear partition wall 55 is removed, and an operator enters the inside to remove the gravel and the like in the screw conveyor 12. At this time, it goes without saying that the cutter bit 37 may be replaced.

In the state of FIG. 5, the rear partition wall 55
It is also possible to open another manhole in a part 36a of the spherical shield frame 36 projecting from the rear to the inside of the manhole to disassemble the screw conveyor 12 in front of the intermediate gate 16.

In the figure, numeral 59 is a center folding portion, numeral 60 is a shield jack, numeral 61 is a tail brush, and numeral 62 is a swivel ring of an erector.

[0040]

According to the present invention, the following excellent effects can be exhibited.

(1) According to the first and second aspects of the invention, the flight of the screw conveyor can be projected into the earth and sand intake chamber in front of the partition wall, and the efficiency of earth and sand intake can be improved.

(2) When gravel or the like is clogged in the screw conveyor, the intermediate gate is closed and the screw conveyor behind the intermediate gate is removed and disassembled to remove the gravel and the like inside the screw conveyor. be able to.

(3) According to the second aspect of the invention, when the screw conveyor in front of the intermediate gate is clogged with gravel or the like, the spherical shield frame is rotated with respect to the outer shield frame so that the cutter is downhole. By exposing it to, it is possible to safely remove the clogged gravel and the like from the inside of the mine.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a Krung shield excavator showing an embodiment of a second invention.

FIG. 2 is a cross-sectional view of the Krung shield machine.

FIG. 3 is a cross-sectional view of a screw conveyor of the Krunshield excavator.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a view showing an operation of the Krung shield machine.

FIG. 6 is a view showing an operation of the Krung shield machine.

FIG. 7 is a vertical cross-sectional view of a shield machine showing an embodiment of the first invention.

FIG. 8 is a vertical cross-sectional view of a shield machine as a conventional example.

[Explanation of symbols]

 1 Shield Frame 2 Sediment Intake Chamber 3 Underground 4 Partition 12 Screw Conveyor 13 Pipe 14 Rotating Shaft 15 Sediment Transport Flight 15a Notch 15x End 16 Intermediate Gate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Tobita 11-1 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima Heavy Industries Co., Ltd. Aichi Factory (72) Inventor Kenichi Kaneko 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo No. Taisei Construction Co., Ltd. (72) Inventor Masanori Hirachi 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Co., Ltd. (72) Takashi Hagiwara 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Toshifumi Inoue 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries Ltd. Kobe Shipyard

Claims (2)

[Claims] 1. A pipe partitioning the inside of the shield frame into front and back is provided with a pipe that connects the earth and sand intake chamber in the front and the mine in the rear to form an outer shell of a screw conveyor, and the pipe extends in the axial direction thereof. In a screw conveyor of a shield machine having a rotary shaft provided along the rotary shaft, and a spiral sand transport flight provided on the rotary shaft, a part of the flight is cut out in the circumferential direction of the pipe, and A screw conveyor for a shield machine, characterized in that an intermediate gate for opening and closing the inside of the pipe is provided in conformity with the end of the flight on the side of the earth and sand intake chamber is projected into the earth and sand intake chamber in front of the partition wall. . 2. A cylindrical outer shield frame is rotatably supported by a spherical shield frame having a cutter for excavating a face in a front portion thereof, and the spherical shield frame is rotated to expose the cutter to the inside of the pit. In a shield machine for exchanging bits, the cutter mounting surface of the spherical shield frame is connected to the front of the earth and sand intake chamber and the rear mine, and a pipe forming an outer shell of the screw conveyor is provided. A rotary shaft is provided in the pipe along its axial direction, and a spiral sand transport flight is provided on the rotary shaft.A part of the flight is cut out in the circumferential direction of the pipe, and the flight is fitted to the cutout part. An intermediate gate for opening and closing the inside of the pipe is provided, and the end portion of the flight on the side of the sediment capturing chamber is projected into the sediment capturing chamber in front of the cutter mounting surface. Screw conveyor for shield machine.