JP2007113213A - Gravel removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gravel removing device capable of preventing a mud discharge pipe from being blocked by large size gravel such as cobble stone by simple facility and preventing lowering of efficiency of excavation. <P>SOLUTION: This gravel removing device takes in a cobble stone S arose when cutting the ground by a cutter bit 1a and conveys it behind a tunnel excavator 1. This gravel removing device is provided with the mud discharge pipe 2 for connecting one end with a take-in port 1d provided on a bulkhead 1c for partitioning a cutter part side and a work room part 1b side of the tunnel excavator from each other, a crushing base 4 extended from a part close to a lower part of the take-in port 1d toward the cutter part side, and a crushing jack 5 extending and contracting from a central axis side of the tunnel excavator toward the crushing base 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gravel removal device for taking in gravel generated when a ground is cut by a front cutter and transporting it smoothly to the rear of a tunnel excavator.

  Conventionally, when excavating a formation in which large gravel such as cobblestone frequently occurs with the tunnel excavator 100, the tunnel excavator 100 including the cone crusher 101 as shown in FIG. 6 is used.

  The excavated soil mixed with cobblestones cut by the cutter bits 100a,... Of the cutter unit of the tunnel excavator 100 is sent to the chamber 100e between the cutter unit and the partition wall 100c.

  And this excavated earth and sand is taken in from the inlet 100d of the accommodating part 101a provided in the inside 100b of the tunnel excavator 100 which accommodates the cone crusher 101, and after a large gravel is crushed by the cone crusher 101, a sludge pipe 102.

  A part of the mud containing the earth and sand sent to the mud pipe 102 is muted and supplied through the mud pipe 103 to the front of the face as a pressurizing fluid.

If comprised in this way, a cobblestone will be crushed into small gravel by the cone crusher 101 before sending to the mud pipe 102, Therefore The mud pipe 102 ahead is not obstruct | occluded.
JP-A-55-30020

  However, in the conventional tunnel excavator 100 described above, since the large cone crusher 101 occupies the space 100b in the tunnel excavator 100 over a wide range, the arrangement and work of other facilities are hindered, and the tunnel excavator 100 It is not applicable to excavation of tunnels with sharp curves due to the long aircraft length.

  Also, when excavating a tunnel in the ground where cobblestones are unlikely to be produced, providing such a large crushing facility is uneconomical due to increased equipment costs.

  In addition to this, there is also a method in which the opening width (slit width) of the face plate 100i on which the cutter bits 100a,. However, the intrusion of a flat cobblestone cannot be prevented, and there is a possibility that the mud pipe 102 is blocked.

  Accordingly, an object of the present invention is to provide a gravel removal device that can prevent the mud pipe from being blocked by large gravel such as cobblestone with a small and simple facility and that does not reduce excavation efficiency.

  In order to achieve the above object, the gravel removal apparatus of the present invention is a gravel removal apparatus that takes in gravel generated when the ground is cut by a cutter unit and conveys the gravel to the rear of a tunnel excavator, the cutter unit side And a sludge pipe connecting one end to an intake provided in a partition partitioning the inner side of the tunnel excavator, and a crushing stand extending from the vicinity of the lower part of the intake toward the cutter unit. And a crushing jack extending and contracting from the central axis side of the tunnel excavator toward the crushing table.

  Here, the drainage pipe is provided with a bent portion at least at two locations inside the tunnel excavator, and can be inserted into the drainage pipe from the rear of the bent portion closest to the partition wall toward the intake port. An occlusion releasing part provided with a penetrating body can be provided.

  Further, in the above invention, the blocking release part includes a long penetrating body, a pedestal part through which the penetrating body is inserted, a push-in jack that advances and retracts the penetrating body through the pedestal part, and the gantry part. A rotating body that is attached and allows the penetrating body to pass therethrough, and a connector that connects the rotating body and the penetrating body can be provided.

  The present invention configured as described above is provided with a crushing stand extending from the vicinity of the lower part of the inlet of the partition wall connecting the sludge pipe toward the cutter unit side, and a large gravel mounted on the crushing stand. Can be crushed finely with a crushing jack.

  For this reason, it is possible to prevent large gravel from entering the drainage pipe as it is and blocking it. In addition, since the crushing jack can be configured with small and simple equipment such as a hydraulic jack, it is inexpensive and only requires a very small space, so the inside of a narrow tunnel excavator can be used effectively. be able to.

  Furthermore, since the crushing jack can be operated continuously, the excavation efficiency is not lowered.

  In addition, even if the drainage pipe is blocked, the penetration body is pierced by providing a blockage release part provided with an insertion body that can be inserted into the drainage pipe from the rear of the bent section of the drainage pipe toward the intake port. Thus, the blockage can be easily released.

  Furthermore, the deposit accumulated in the sludge pipe can be easily crushed by adopting a configuration in which the long penetrating body of the blockage releasing portion is rotated by the rotating body and is advanced and retracted by the pushing jack.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 2 shows an outline of the overall configuration of the tunnel excavator 1 of the present embodiment.

  In the tunnel excavator 1 according to the present embodiment, as shown in FIG. 2, a cylindrical skin plate 1h is disposed behind a cutter portion made of a cutter bit 1a,... For cutting the ground, and the skin plate. The inner side of 1h is divided by a partition wall 1c into a chamber 1e into which excavated earth and sand are taken in and a work chamber portion 1b serving as a work space.

  In this working chamber 1b, a mud pipe 2 for conveying the cut excavated sediment to the rear of the tunnel excavator 1, and a mud pipe 3 for sending out a pressurizing fluid (mud water) for suppressing the collapse of the excavated surface. Further, a shield jack 1f for propelling the tunnel excavator 1 and a middle jack 1g for bending the tunnel excavator 1 when excavating the bent portion of the tunnel are provided.

  In addition, an inlet 1d for excavating earth and sand is formed below the partition wall 1c for preventing intrusion of excavated earth and mud in the chamber 1e, and an attachment portion 2c for the mud pipe 2 is connected from the working chamber 1b side. Yes.

  Further, as shown in FIG. 1, a crushing table 4 extending toward the cutter unit side is connected to the chamber 1e side of the intake port 1d to which the mounting portion 2c is connected.

  The crushing table 4 can be formed, for example, by removing the upper part of a cylindrical steel pipe and supporting the part where only the arc of the lower part of the outer shell protrudes toward the cutter part from the lower side by the support table 4a. .

  Then, a crushing jack 5 that can expand and contract toward the upper surface of the crushing table 4 is attached to the center axis side of the tunnel excavator 1. The expansion / contraction part 5a of this crushing jack 5 has a dome-shaped depression formed at the tip, and as shown in FIG. 1, gravel such as cobblestone S sandwiched between the tip of the extension / contraction part 5a and the top surface of the crushing table 4 is While being caught in this hollow, it is crushed and finely crushed by the pressure or striking force of the jack.

  The excavated earth and sand in which large gravel is crushed in this way is conveyed to the rear of the tunnel excavator 1 by a mud pipe 2 as shown in FIG.

  When the mud pipe 2 is extended rearward, the mud pipe 2 is lifted to the central axis side of the tunnel excavator 1 at the bent portion 2a, is bent again at the bent portion 2b through the inclined portion 2e, and extends substantially horizontally. Is done.

  Then, behind the bent portion 2a closest to the partition wall 1c, a clogging release portion 6 having a penetrating body for breaking through deposits clogged in the pipe when the mud pipe 2 is clogged is provided.

  The blocking release portion 6 includes a rod 61 as a long penetrating body, a pedestal portion 66 through which the rod 61 is inserted, a push-in jack 62 for moving the rod 61 back and forth via the pedestal portion 66, and a pedestal portion 66. And a gear 63 as a rotating body through which the rod 61 is inserted, and a connector 64 for connecting the gear 63 and the rod 61.

  The rod 61 is formed of a steel pipe, a steel rod, or the like, and connection holes 61a,... Used for connection to the gear 63 are provided at predetermined intervals on the side surface. In addition, it is preferable to form the front-end | tip of the rod 61 in acute angle shape in order to make the penetration | invasion to a deposit easy.

  Further, when the rod 61 is formed of a steel pipe, a plurality of disk-like blocking portions for preventing sediment ejection are provided between the connection holes 61a, 61a on the inner periphery of the pipe, so that the rod 61 passes through the rod 61 during the blocking release operation. Thus, it is preferable to prevent the excavated earth and sand from being ejected into the working chamber 1b.

  The pedestal portion 66 through which the rod 61 is inserted is formed in a rectangular shape, and guide portions 66a and 66a are projected on both sides of the rod 61 in the extending orthogonal direction.

  The guide portions 66a and 66a are U-shaped members in cross-sectional view that slide two rail portions 66b and 66b extending in parallel to the rear of the bent portion 2a. The fixtures 62b and 62b provided at the distal ends of the telescopic parts 62a and 62a are respectively connected.

  When the push-in jack 62 attached to each of the guide portions 66a and 66a is expanded and contracted, the gantry portion 66 advances and retreats along the rail portions 66b and 66b.

  The upper and lower surfaces of the rear ends of the rail portions 66b and 66b are reinforced with reinforcing beams 66c and 66c as shown in FIG. 3, so that even if an external force is applied when the gantry 66 is moved. The parallelism of the rail portions 66b and 66b is ensured.

  A gear 63 is attached to the front surface of the gantry 66, and a rod 61 passes through the center of the gear 63. The rod 61 and the gear 63 are connected by a connector 64.

  As shown in FIGS. 3 to 5, the connector 64 includes connection plates 64 a and 64 a and pins 64 b that are fixed to the front surface of the gear 63 and disposed on both sides of the rod 61.

  The pin 64b is inserted into the holes of the connecting plates 64a and 64a and is inserted into the connecting hole 61a provided in the rod 61, whereby the rod 61 and the gear 63 are connected. Although not shown, the connector 64 is subjected to a pin 64b drop-off preventing process.

  A transmission gear 63b as shown in FIG. 5 is engaged below the gear 63. When the transmission gear 63b is rotated by the drive motor 63a, the gear 63 and the rod 61 connected to the gear 63 are associated therewith. Rotates.

  Thus, by giving a rotational force to the rod 61, the rod 61 can be easily propelled into the deposit closing the mud pipe 2.

  As shown in FIGS. 3 to 5, the rod 61 is inserted into the mud pipe 2 from the water stop insertion portion 65 subjected to the water stop treatment, and can move inside the attachment portion 2 c. That is, since the inside of the mud pipe 2 and the work chamber portion 1b of the tunnel excavator 1 communicate with each other through the water stop insertion portion 65, the water stop insertion portion 65 is provided to prevent leakage of water and earth and sand. .

  The water stop insertion portion 65 includes a seal member 65b that exhibits a water stop function when the rod 61 is inserted, and an on-off valve 65a that is used when the rod 61 is pulled out.

  That is, since the on-off valve 65a cannot be closed when the rod 61 is inserted, the water is stopped by the sealing material 65b such as a rubber ring that fills the gap with the outer peripheral surface of the rod 61. In the state where 61 is pulled out, the on-off valve 65a is closed and the pipe is covered to stop water.

  Next, the operation of the tunnel excavator 1 of the present embodiment will be described.

  First, as shown in FIG. 2, the tunnel excavator 1 is propelled by extending the shield jack 1 f while cutting the ground with the cutter bits 1 a arranged on the front face plate 1 i of the tunnel excavator 1. .

  Since the excavation surface in front of the cutter bit 1a,... Is pressurized by the muddy water (pressurizing fluid) sent out by the mud pipe 3, the excavation taken into the chamber 1e from the slit of the face plate 1i. The earth and sand are also in a pressurized state, and the excavated earth and sand flows out toward the intake 1 d connected to the mud pipe 2.

  Then, as shown in FIG. 1, the tip of the expansion / contraction part 5 a of the crushing jack 5 is pressed against a place where a large gravel such as a cobblestone S is placed on the upper surface of the crushing table 4 to crush the cobblestone S. The cobblestone S finely crushed in this way is discharged without blocking the mud pipe 2.

  In addition, when the excavated earth and sand are being conveyed without delay in the inside of the mud pipe 2 as described above, the rod 61 is retracted to a position where it does not protrude into the mud pipe 2 or is pulled out to open the on-off valve 65a. It is closed so that the flow in the mud pipe 2 is not obstructed and the excavation surface pressure can be maintained at a predetermined pressure.

  On the other hand, even if the crushing jack 5 is used in this way, the cobblestone S that passes through the tip of the expansion / contraction part 5a and enters the inside of the mud pipe 2 cannot be completely eliminated.

  If the mud pipe 2 is blocked by the cobblestone S that accidentally enters in this manner, the valve 1a in the mud pipe 2 is closed with the valve opening / closing jack 2d to disassemble the mud pipe 2, and the chamber 1e It is possible to release the blockage of the tube behind the bent portion 2a while maintaining the internal pressure.

  However, in this method, the blockage of the attachment portion 2c on the intake port 1d side cannot be released. Therefore, the blockage in the mud pipe 2 around the intake port 1d such as the attachment portion 2c is caused by the blockage release portion 6 being blocked. Set and release.

  For example, when the rod 61 is pulled out from the water stop insertion portion 65 and the on-off valve 65 a is closed, the rod 61 is inserted from behind the gantry portion 66 and inserted into the water stop insertion portion 65.

  Then, the on-off valve 65a is opened, and the rod 61 is further pushed in the direction of the intake port 1d. The pushing is temporarily interrupted when the tip of the rod 61 comes into contact with deposits (cobblestone S, crushing glass, etc.) in the pipe.

  Subsequently, the pin 63b is inserted by aligning the positions of the holes of the connecting plates 64a and 64a fixed to the gear 63 and the position of the connecting hole 61a of the rod 61, and the gear 63 and the rod 61 are connected.

  In this state, the drive motor 63a is driven to rotate the transmission gear 63b, the gear 63, and the rod 61, and the push-in jacks 62, 62 are expanded and contracted to push the gantry 66 and the rod 61 in the direction of the inlet 1d. Crush the deposits while pulling back.

  Extrusion by the push-in jacks 62 and 62 can be performed at a time for the stroke of the jack as shown in FIGS. For example, if the strokes of the push-in jacks 62, 62 are 300 mm, three connecting holes 61a,... Are opened in the rod 61 having a unit length of 1.2 m, and the rod 61 is sent out in three steps.

  When the rod 61 is further pushed out, the rod 61 is newly added to the rear end of the rod 61, the pin 64b is removed, the connection between the gear 63 and the rod 61 is released, and the push-in jacks 62, 62 are contracted to be connected one rear. The positions of the holes of the connecting plates 64a and 64a are aligned with the holes 61a.

  Then, the rod 61 is connected to the gear 63 again through the pin 64b through the connection hole 61a and the holes of the connection plates 64a and 64a, and the pushing is resumed.

  In this way, the refilling of the push-in jacks 62, 62, the pushing / pulling by the push-in jacks 62, 62, and the addition of the rod 61 are repeated to push the accumulated earth and sand toward the chamber 1e to release the blockage in the pipe.

  In addition, when the rod 61 becomes long, as shown in FIG. 2, you may make it provide the sending part 67 behind the obstruction | occlusion cancellation | release part 6, and may push out the rear end of the rod 61. FIG.

  According to the gravel removing apparatus of the present embodiment configured as described above, the gravel removing device extends from the vicinity of the lower portion of the intake port 1d of the partition wall 1c connecting the mud pipe 2 toward the cutter bit 1a,. The crushing table 4 is provided, and the cobblestone S placed on the crushing table 4 can be finely crushed by the crushing jack 5.

  For this reason, it is possible to prevent the cobblestone S from entering the mud pipe 2 as it is and blocking it. In addition, since the crushing jack 5 can be configured with a small and simple equipment such as a hydraulic jack, it is inexpensive and it is only necessary to secure a very small space. Therefore, the working chamber portion 1b of the narrow tunnel excavator 1 is used. Thus, the present invention can be applied to the tunnel excavator 1 that excavates a sharp curve.

  Furthermore, since the crushing jack 5 can be operated continuously, the excavation efficiency is not reduced.

  Further, the provision of the closing release portion 6 including the rod 61 that can be inserted into the drainage pipe 2 from the rear of the bent part 2a of the drainage pipe 2 toward the intake port 1d causes the drainage pipe 2 to be temporarily blocked. Even in this case, the blocking can be easily released by piercing the rod 61.

  Further, by adopting a configuration in which the long rod 61 of the closing release portion 6 is rotated by the gear 63 and is advanced and retracted by the push-in jack 62, the deposits accumulated in the mud pipe 2 can be easily broken.

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are possible. Are included in the present invention.

  For example, in the above-described embodiment, the case where the gravel removal device is installed in a sealed muddy water type shield excavator has been described, but the present invention is not limited to this, and the same type of earth pressure type shield excavator or open It can also be equipped with a type shield excavator.

  In the embodiment described above, the crushing table 4 is formed using a steel pipe. However, the crushing table 4 is not limited to this, and the crushing table can be formed only by the support table 4a of FIG. A table may be manufactured by combining steel plates or steel materials on the cutter side. Furthermore, the upper surface of the crushing table does not have to be the same height as the intake port 1d, and may be formed at a height slightly lower than the lower surface of the intake port 1d.

  Furthermore, in the above-described embodiment, the distal end of the expansion / contraction part 5a of the crushing jack 5 is formed in a dome-shaped depression, but the present invention is not limited to this. Should be selected.

It is a perspective view explaining the structure of the gravel removal apparatus of the best embodiment of this invention. It is a longitudinal section explaining the composition of the tunnel excavator of the best embodiment of the present invention. It is a perspective view explaining the structure of a mud drain pipe and the obstruction | occlusion cancellation | release part. It is a partially cut top view explaining the structure of a mud drain pipe and the obstruction | occlusion cancellation | release part. It is a side view explaining the structure of a mud drain pipe and an obstruction | occlusion releasing part. It is a longitudinal cross-sectional view explaining the structure of the tunnel excavator equipped with the conventional cone crusher.

Explanation of symbols

1 Tunnel excavator 1a Cutter bit (cutter part)
1b Working room (inside tunnel excavator)
1c Bulkhead 1d Intake port 2 Drainage pipes 2a, 2b Bending part 4 Crushing table 5 Crushing jack 6 Closure release part 61 Rod (penetrating body)
62 Push-in jack 63 Gear (Rotating body)
64 connector 65 gantry S cobblestone (pebbles)

Claims (3)

A gravel removal device that takes in gravel generated when cutting the ground with a cutter unit and transports it to the rear of a tunnel excavator,
A mud pipe connecting one end to an intake port provided in a partition wall that partitions the cutter unit side and the inner side of the tunnel excavator;
A crushing stand extending from the lower part of the intake port toward the cutter unit;
A gravel removing apparatus comprising: a crushing jack that expands and contracts from a center axis side of the tunnel excavator toward the crushing table.   The drainage pipe has a bent portion at least at two locations inside the tunnel excavator, and an penetration body that can be inserted into the drainage pipe from the rear of the bent portion closest to the partition wall toward the intake port. The gravel removal apparatus according to claim 1, further comprising a blockage release unit provided. The obstruction release part includes a long penetrating body, a pedestal part through which the penetrating body is inserted, a push-in jack for advancing and retracting the penetrating body through the pedestal part, and the penetrating body attached to the pedestal part. The gravel removing apparatus according to claim 2, further comprising: a rotating body through which the rotating body is inserted; and a connecting tool that connects the rotating body and the penetrating body.

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