JP5359070B2 - Dredge excavator and dredging system using the dredger for dredging - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dredging excavator which can draw in an excavated deposit efficiently and can be retrieved even when embedded in the fallen deposit, and a dredging system using the dredging excavator. <P>SOLUTION: The dredging excavator 1 includes cutters 4, 5 rotating around a horizontal shaft 3 to excavate the deposit 2, a discharging device 6 drawing up the deposit 2 excavated with the cutters 4, 5 and discharging it above the water, and a skeleton 7 arranged on an upper side of the cutters 4, 5 to support the cutters 4, 5 and to house the discharging device 6. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a dredge excavator and a dredging system for dredging sediment deposited on the bottom of a dam reservoir.

In general dams, dredging work for discharging sediments such as mud and earth and sand accumulated at the bottom of the dam reservoir is appropriately implemented.
For example, Patent Document 1 discloses a floating body that floats on water, a rail that is laid on the floating body, a carriage that travels along the rail, and a dredge excavator that excavates sediment deposited on the bottom of a dam reservoir. A scissor system is disclosed.

  The dredge excavator includes a plurality of cutters for excavating deposits, a pump for discharging excavated deposits on a floating body, a casing that is suspended from a carriage and supports the cutters. The excavated deposits are simultaneously excavated, and the excavated deposits are sucked with a pump and discharged onto the floating body.

And this dredging method using the dredger for dredging is to move the dredger for dredging horizontally by moving the carriage along the rail while rotating the cutter and excavate the deposit on the line. .
JP 2007-146481 A

  However, in the dredge excavator of the dredging system described above, measures are not taken when the surrounding excavator is buried during excavation and the dredger excavated for dredging. There was a problem that it might not be possible.

  In addition, the suction port of the pump provided in the excavator for dredging is provided in the upper part between the cutters. Although it sucks in a lot, it exists near the lower part between the cutters and does not suck much water including the excavated sediment. Therefore, there is a problem that the discharge efficiency of the excavated sediment is low. Furthermore, there was a problem that sediments that were excavated but not sucked diffused around and the transparency of the dam reservoir was lowered.

  Therefore, the present invention has been made in view of the above problems, and its purpose is to be able to suck in excavated deposits efficiently and to bury them in the deposits due to the collapse of the deposits. It is another object of the present invention to provide a dredging excavator that can be recovered and a dredging system using the dredging excavator.

In order to achieve the above object, the dredge excavator of the present invention is rotatable about a horizontal axis, a cutter for excavating the sediment deposited on the bottom of the dam reservoir, and the sediment excavated by the cutter An excavator for dredging, comprising: a discharge device for sucking and discharging the gas, and a housing provided above the cutter for supporting the cutter and storing the discharge device, Is provided such that ends in the horizontal axis direction and a direction perpendicular thereto protrude outward in the horizontal direction from the casing, and a skirt for enclosing the upper part of the cutter is attached to the lower part of the casing. The end of the cutter in the direction perpendicular to the horizontal axis direction protrudes outward in the horizontal direction from the skirt (first invention).

  According to the excavator for dredging according to the present invention, the horizontal axis direction of the cutter and the end in the direction perpendicular to the cutter are provided so as to protrude outward in the horizontal direction from the rod, so that it is more than the width of the rod. A wide range can be excavated. Therefore, during the excavation of the deposit, even if the deposit collapses and the dredge excavator is buried in the deposit, the cutter is rotated to remove the deposit immediately above the end in the direction perpendicular to the horizontal axis of the cutter. Since excavation can be performed and a surrounding deposit can be loosened by forming a gap between the excavator for dredging and the deposit, the excavator for dredging can be recovered from the deposit.

  Further, since the skirt is attached so as to surround the upper part of the cutter, the range of water sucked into the discharge device can be limited to the inside of the skirt and the vicinity of the lower part of the cutter. When the discharge device is operated and water is sucked in, a flow of water from the outside of the skirt to the discharge device through the lower part of the skirt and the vicinity of the lower part of the cutter is generated. When the cutter is rotated in this state, the excavated deposit is carried by the flow of water from the outside of the skirt toward the discharge device and sucked into the discharge device. Therefore, the excavated deposit can be sucked efficiently. Further, since the excavated sediment is almost sucked in, the amount of diffusion to the surroundings is small, and the transparency of the surrounding water is hardly lowered.

In this invention, it is good also as providing further the inclinometer attached to the said housing and measuring the inclination angle, and the depth meter for measuring the water depth of the said cutter.
According to the excavator for dredging according to the present invention, since the inclinometer is provided, the inclination angle of the excavator for dredging can be measured. Therefore, excavation can be performed with the dredge excavator vertical.
Moreover, since the depth meter is provided, the water depth of a cutter can be measured. Therefore, the same depth can be excavated.

In this invention, it is good also as providing the position detection apparatus for detecting the horizontal position of the said cutter.
According to the dredge excavator according to the present invention, since the position detection device is provided, the horizontal position of the cutter can be detected. Therefore, a predetermined excavation location can be excavated accurately.

The dredging system of the present invention is a dredging system for excavating and discharging deposits deposited on the bottom of a dam reservoir, and is capable of rotating around a horizontal axis and is in the horizontal axis direction of a cutter for excavating the deposits And an end in a direction perpendicular to this is provided so as to protrude outward in the horizontal direction from the housing supporting the cutter, and a skirt for surrounding the upper portion of the cutter is attached to the lower portion of the housing , An end of the cutter in a direction orthogonal to the horizontal axis direction is provided with a drill excavator in which the end protrudes outward in the horizontal direction from the skirt .

  According to the scissor system according to the present invention, the horizontal axis direction of the cutter and the end in the direction perpendicular thereto are provided so as to protrude outward in the horizontal direction from the housing, so that the range wider than the width of the housing is provided. Can be excavated. Therefore, during the excavation of the deposit, even if the deposit collapses and the dredge excavator is buried in the deposit, the cutter is rotated to remove the deposit immediately above the end in the direction perpendicular to the horizontal axis of the cutter. Since excavation can be performed and a surrounding deposit can be loosened by forming a gap between the excavator for dredging and the deposit, the excavator for dredging can be recovered from the deposit.

  Further, since the skirt is attached so as to surround the upper part of the cutter, the range of water sucked into the discharge device can be limited to the inside of the skirt and the vicinity of the lower part of the cutter. When the discharge device is operated and water is sucked in, a flow of water from the outside of the skirt to the discharge device through the lower part of the skirt and the vicinity of the lower part of the cutter is generated. When the cutter is rotated in this state, the excavated deposit is carried by the flow of water from the outside of the skirt toward the discharge device and sucked into the discharge device. Therefore, the excavated deposit can be sucked efficiently. Further, since the excavated sediment is almost sucked in, the amount of diffusion to the surroundings is small, and the transparency of the surrounding water is hardly lowered.

In the present invention, the dredge excavator may include an inclinometer for measuring an inclination angle and a depth meter for measuring the water depth of the cutter.
According to the dredge system according to the present invention, since the dredge excavator includes the inclinometer, the inclination angle of the dredge excavator can be measured. Therefore, excavation can be performed with the dredge excavator vertical.
Moreover, since the excavator for dredging is equipped with the depth meter, the water depth of a cutter can be measured. Therefore, the same depth can be excavated accurately.

In the present invention, the dredge excavator may include a position detection device for detecting a horizontal position of the cutter.
According to the dredging system according to the present invention, since the excavator for dredging includes the position detection device, the horizontal position of the cutter can be detected. Therefore, a predetermined excavation location can be excavated accurately.

In this invention, it is good also as providing the ultrasonic measuring apparatus for measuring the topography of the bottom of a dam reservoir.
According to the dredging system according to the present invention, since the ultrasonic measuring device is provided, the topography of the bottom of the dam reservoir can be measured. Therefore, since the excavation condition etc. after excavating the deposit can be confirmed, high quality dredging can be performed.

  According to the dredge excavator and dredging system according to the present invention, the excavated deposit can be sucked in efficiently, and can be recovered even if it is buried in the deposit due to the collapse of the deposit.

  1 to 3 are a front view, a side view, and a plan view showing a dredge excavator 1 according to an embodiment of the present invention.

  As shown in FIG. 1 to FIG. 3, the dredge excavator 1 for excavating the sediment 2 accumulated at the bottom of the dam reservoir rotates around the horizontal axis 3 to excavate the sediment 2. The cutters 4 and 5, the deposits 2 excavated by the cutters 4 and 5, and the discharge device 6 for discharging them onto the water, and supporting the cutters 4 and 5, and storing the discharge device 6 And a housing 7 for the purpose.

  Each cutter 4, 5 is composed of a cylindrical cutter drum 8 that rotates about a horizontal axis 3, and a plurality of bits 9 that are attached to the outer peripheral surface of the cutter drum 8. The deposit 2 is excavated by 9 being driven into the deposit 2.

  By rotating the cutters 4 and 5 at different rotational speeds, the dredge excavator 1 can be advanced in a predetermined direction. For example, when the cutter 4 is rotated faster than the cutter 5, the dredge excavator 1 advances horizontally in the left direction of FIG. 1, and when the cutter 5 is rotated faster than the cutter 4, Progress horizontally. In the following description, the direction in which the dredge excavator 1 travels horizontally is defined as the traveling direction, and the direction orthogonal to the traveling direction is defined as the width direction.

  Each cutter 4, 5 is adjusted not only within the range of the body width of the housing 7, but also with a diameter and an axial length adjusted so that the outside of the range can be excavated. Ends 4b, 5b and end portions 4a, 5a in a direction orthogonal to the horizontal axis (hereinafter referred to as radial direction) are attached so as to protrude from the housing 7 in the horizontal direction, that is, outward in the traveling direction and the width direction. .

  Specifically, when the width of the main body 7 is set to 300 cm and 70 cm, respectively, the diameter of the cutters 4 and 5 and the length in the axial direction are 150 cm and 140 cm, respectively. Are attached so that one end 4a, 5a in the radial direction protrudes 10 cm from the housing 7 in the traveling direction, and both end portions 4b, 5b in the axial direction of the cutters 4, 5 are wider than the housing 7. It was attached so as to protrude 35 cm in each direction.

  In addition, in this embodiment, although the case where the two cutters 4 and 5 were provided was demonstrated, it is not limited to this, You may provide three or more, In that case, the advancing direction of the housing 7 The cutters 4, 5 provided on both sides are attached so that the end portions 4 a, 5 a in the radial direction protrude in the traveling direction from the housing 7, and the cutters 4, 5 and other provided therebetween Both ends 4b and 5b in the axial direction of the cutter are attached so as to protrude in the width direction from the casing 7.

  The discharge device 6 includes a suction nozzle 10 for sucking the excavated deposit 2, a sand pump 11 for discharging the deposit 2 sucked from the suction nozzle 10 onto the water, and a deposit discharged from the sand pump 11. And a hose 12 for feeding the object 2 onto the water.

  The suction nozzle 10 is provided such that one end is detachably connected to the sand pump 11 and the other end protrudes between the cutters 4 and 5 from the lower end of the housing 7.

  In the present embodiment, the method for discharging the deposit 2 using the sand pump 11 as the discharge device 6 has been described. However, the method is not limited to this, and the deposit 2 is discharged by an air lift, for example. May be.

  A skirt 13 is attached to the lower portion of the housing 7 so as to protrude below the housing 7 and surround the upper portions of the cutters 4 and 5. The skirt 13 includes a width direction skirt portion 14 provided on a side surface in the width direction of the housing 7 and a traveling direction skirt portion 15 provided on a side surface in the traveling direction of the housing 7.

The width direction skirt portion 14 is provided so as to cover the upper surfaces of the end portions 4 b and 5 b of the cutters 4 and 5 protruding outward from the housing 7 and to surround the upper side surfaces of the cutters 4 and 5.
The part which covers the edge parts 4b and 5b of the cutters 4 and 5 of the skirt part 14 for the width direction is inclined so as not to be deposited on the upper surface when the deposit 2 sinks.
The vertical length of the portion surrounding the upper side surfaces of the cutters 4 and 5 of the width direction skirt portion 14 is adjusted so that the lower end is below the suction port 10 a of the suction nozzle 10.

  The traveling direction skirt portion 15 is provided so as to extend in the vertical direction from the lower portion of the housing 7, and the vertical length of the skirt portion 15 is set to the cutters 4 and 5 when the cutters 4 and 5 are rotating. It is adjusted so as not to hit the attached bit 9.

  Since the width direction skirt portion 14 and the traveling direction skirt portion 15 are provided so as to surround the upper portions of the cutters 4, 5, the range of water sucked by the suction nozzle 10 is set inside the skirt 13 and the cutters 4, 5. It can be limited to the vicinity of the lower part. When the sand pump 11 is operated in the state where the skirt 13 is provided and the water is pumped, as shown in FIGS. 4 and 5, suction is performed from the outside of the skirt 13 below the skirt 13 and near the lower portions of the cutters 4 and 5. A flow of water toward the mouth 10a occurs. When the cutters 4 and 5 are rotated in this state, the excavated deposit 2 is carried by the flow of water from the outside of the skirt 13 toward the suction port 10a, and enters the suction nozzle 10 from the suction port 10a. Inhaled. Therefore, the excavated deposit 2 hardly diffuses outside the skirt 13.

  Further, even when the excavator 1 for dredging is buried in the deposit 2 due to the collapse of the surrounding deposit 2 while excavating the deposit 2, the cutters 4 and 5 in the traveling direction are rotated by rotating the cutters 4 and 5. The excavated sediment 2 is excavated by the end portions 4a and 5a, and the excavated deposit 2 is discharged by the discharge device 6, so that the excavator for dredging 1 and the deposit 2 deposited around the excavator 1 Since the surrounding sediment 2 can be loosened by forming a gap, the excavator 1 for dredging can be recovered from the sediment 2.

  The dredge excavator 1 includes an inclinometer 21 for measuring the inclination angle of the dredge excavator 1, a depth meter 22 for measuring the water depth position of the cutters 4 and 5, and the horizontal position of the dredge excavator 1. An electronic azimuth meter 23 that uses GPS for detecting the above is provided.

  The inclination angle of the dredge excavator 1 is measured by the inclinometer 21, and when it is inclined, the dredge excavator 1 is adjusted to be vertical (details will be described later).

  Further, the depth of the cutters 4 and 5 is measured by the depth meter 22 to confirm the excavation depth. When the water depth is measured by the depth meter 22 and the water depth of the cutters 4 and 5 is shallower than the predetermined depth, the wire rope 18b of the traveling means 18 is extended so that the cutters 4 and 5 reach the predetermined depth. . On the other hand, when the water depth is measured by the depth meter 22 and the water depth of the cutters 4 and 5 is deeper than the predetermined depth, the wire rope of the traveling means 18 so that the cutters 4 and 5 reach the predetermined depth. Wind 18b and adjust.

  FIG. 6 is a schematic view showing the dredge system 16 according to the embodiment of the present invention, and FIG. 7 is an enlarged view of the dredge excavator 1 and the traveling means 18 of FIG.

  As shown in FIGS. 6 and 7, the dredging system 16 for dredging the sediment 2 deposited on the bottom of the dam reservoir is movable on the water and has a trolley 17 as a working scaffold, and dredging for dredging. The excavator 1 is excavated by the excavator 1 and the excavator 1 that is suspended by the excavator 1 and travels on the carriage 17 so that the excavator 1 can excavate a predetermined position. And a transport ship 19 for transporting the deposit 2 to the ground.

The trolley 17 is provided with an ultrasonic measuring device 20 for measuring the topography of the dam bottom. The topography of the dam bottom is measured by the ultrasonic measuring device 20, and the excavation status during excavation and after excavation is confirmed.
As the traveling means 18, a crawler crane capable of self-propelling on the carriage 17 and having a telescopic boom 18 a was used.
In the present embodiment, a crawler crane is used as the traveling means 18, but the present invention is not limited to this, and a rail laid on the upper surface of the carriage 17 and a carriage movable on the rail may be used. Good.

  The horizontal position of the dredge excavator 1 is measured with the electronic azimuth meter 23 to confirm the excavation position. When the horizontal position is measured by the electronic azimuth meter 23 and the position of the excavator for dredging 1 is away from the planned excavation position, the traveling means 18 main body is moved or the telescopic boom 18a is expanded and contracted.

  The dredge excavator 1 is connected to a wire rope 18b of a crawler crane, and is movable in the vertical direction by winding and unwinding the wire rope 18b. Further, it can be moved in the horizontal direction by movement by a crawler crane or expansion and contraction of the telescopic boom 18a.

The sediment 2 excavated by the dredge excavator 1 is fed to the transport ship 19 by a mud pipe 24 having one end connected to the hose 12 and the other end connected to the transport ship 19.
When the excavated deposit 2 is loaded on the transport ship 19 by a predetermined amount, the transport ship 19 transports the deposit 2 to a deposit processing facility such as the ground.

A method of wrinkling using the above-described wrinkle system 16 will be described below according to a work procedure.
First, the trolley 17 loaded with the dredge excavator 1 and the traveling means 18 is anchored near the dredger position.
Next, the traveling means 18 that suspends the dredging excavator 1 is moved, and the horizontal position of the dredging excavator 1 is measured by the electronic azimuth meter 23, while the dredging excavator 1 is placed directly above the dredging position. Install.
And the wire rope 18b of the traveling means 18 is drawn out and the dredge excavator 1 is lowered onto the deposit 2 at the bottom of the dam reservoir. When both the cutters 4 and 5 reach the deposit 2, the depth of the water is measured by the depth gauge 22 to determine the depth of excavation.

Next, both cutters 4 and 5 are rotated at the same rotational speed, and excavation is started in the vertical direction.
The sand pump 11 is operated simultaneously with the start of excavation, and the excavated deposit 2 is sucked from the suction port 10a and discharged to the transport ship 19 through the hose 12 and the mud pipe 24.

  The excavated deposit 2 is carried near the lower part between the cutter 4 and the cutter 5 by the rotation of the cutters 4 and 5. At this time, a flow of water from the outside of the skirt 13 to the suction port 10a through the lower part of the skirt 13 and the lower part of the cutters 4 and 5 is generated by the suction of the sand pump 11, so that the excavated deposit 2 is The water flows to the suction port 10a and is sucked into the suction nozzle 10.

  During excavation, the inclination angle of the dredge excavator 1 is measured with the inclinometer 21 and the water depth of the cutters 4 and 5 is measured with the depth gauge 22.

  Further, when the inclination angle of the dredge excavator 1 is measured by the inclinometer 21, and the excavator 1 for dredging is inclined, the wire rope 18b of the traveling means 18 is wound or unwound while being dredged. The excavator 1 is made vertical. For example, if a cobblestone or the like exists below one cutter 4 and is hard, and the lower one of the other cutter 5 is soft, such as earth and sand, excavation on one cutter 4 side is delayed and excavation on the other cutter 5 side is delayed. Since the slope excavator 1 is moved forward, the inclination angle is measured by the inclinometer 21 and the excavator 1 is excavated while adjusting the angle of the excavator 1 so as not to be inclined.

  Further, when the depth of water is measured by the depth meter 22 and reaches a predetermined depth such that the cutters 4 and 5 are buried in the deposit 2, the rotational speed of one cutter 4 is increased and the dredge excavator 1 is advanced by a predetermined amount. Progress horizontally in the direction.

  As described above, the sediment 2 excavated by the advancement of the dredge excavator 1 is carried near the lower portion between the cutters 4 and 5 by the rotation of the cutters 4 and 5, and the water generated by the suction of the sand pump 11. The suction nozzle 10 is sucked by the flow.

  When excavating the sediment 2 by moving the dredge excavator 1 horizontally, the inclination angle 21 and the water depth of the dredge excavator 1 are measured with the inclinometer 21 and the depth gauge 22 as in the case of the vertical excavation. .

FIG. 8 is a view showing a state where the dredge excavator 1 according to the embodiment of the present invention is inclined forward in the traveling direction.
As shown in FIG. 8, when the inclination angle is measured by the inclinometer 21 and the excavator 1 for dredging is tilted forward in the traveling direction, for example, deposits in the traveling direction are deposited. Although the towing excavator 1 is hard and travels slower than a predetermined speed determined in advance by design or the like, the traveling means 18 on the carriage 17 proceeds in the traveling direction at the predetermined speed, Since the traveling means 18 may be traveling in the direction of travel relative to the dredge excavator 1, the traveling speed of the traveling means 18 is slowed to match the traveling speed of the dredge excavator 1.

FIG. 9 is a view showing a state where the dredge excavator 1 according to the embodiment of the present invention is inclined in the direction opposite to the traveling direction.
As shown in FIG. 9, when the inclination angle is measured by the inclinometer 21 and the excavator 1 for dredging is tilted in a direction opposite to the traveling direction, for example, on the carriage 17 Despite the traveling means 18 traveling at a predetermined speed, the dredge excavator 1 travels faster than the predetermined speed, and the dredger excavator 1 proceeds in the traveling direction relative to the traveling means 18. Since the state can be considered, the traveling speed of the traveling means 18 is increased to match the traveling speed of the dredge excavator 1.

As described above, a predetermined range is excavated while adjusting the inclination angle and water depth position of the dredge excavator 1.
Finally, the terrain at the bottom of the dam is measured by the ultrasonic measurement device 20 to confirm the excavation status. If there is a place left without excavation, excavation is performed again.

  According to the dredge excavator 1 and the dredge system 16 in the present embodiment described above, the radial end portions 4a and 4b and the axial end portions 5a and 5b of the cutters 4 and 5 are respectively in the traveling direction and the width direction from the rod body 7. Since it is provided so as to protrude outward, it is possible to excavate a range wider than the width of the housing 7. Therefore, even if the deposit 2 collapses during the excavation of the deposit 2 and the dredge excavator 1 is buried in the deposit 2, the cutters 4 and 5 are rotated to rotate the radial ends 4a of the cutters 4 and 5. 5a is excavated, and the surrounding deposit 2 can be loosened by forming a gap between the excavator 1 for dredging and the deposit 2; 1 can be recovered.

  Further, since the width direction skirt portion 14 and the traveling direction skirt portion 15 are provided so as to surround the upper portions of the cutters 4 and 5, the range of water sucked by the suction nozzle 10 is set inside the skirt 13 and the cutter 4, It can be limited to the vicinity of the lower part of 5. When the sand pump 11 is operated in the state where the skirt 13 is provided and water is pumped, a flow of water from the outside of the skirt 13 to the suction port 10a through the lower part of the skirt 13 and the lower part between the cutters 4 and 5 is generated. . In this state, when the cutters 4 and 5 are rotated to excavate the deposit 2, the excavated deposit 2 is carried by the flow of water from the outside of the skirt 13 toward the suction port 10 a and sucked from the suction port 10 a. It is sucked into the nozzle 10. Therefore, the excavated deposit 2 hardly diffuses outside the skirt 13. Furthermore, since the excavated sediment 2 is almost sucked in, the amount of diffusion to the surroundings is small, and the transparency of the surrounding water hardly decreases.

  Since the dredge excavator 1 includes the inclinometer 21, the inclination angle of the dredge excavator 1 can be measured. Therefore, excavation can be performed with the dredge excavator 1 vertical.

  Moreover, since the dredge excavator 1 includes the depth gauge 22, the water depth of the cutters 4 and 5 can be measured. Therefore, a predetermined depth can be excavated accurately.

  Further, since the dredge excavator 1 includes the electronic compass 23, the horizontal position of the cutters 4 and 5 can be detected. Therefore, a predetermined excavation location can be excavated accurately.

  Moreover, since the ultrasonic measuring device 20 is provided, the topography of the bottom of the dam reservoir can be measured. Therefore, since the excavation condition etc. after excavating the deposit 2 can be confirmed, high quality dredging can be performed.

It is a front view which shows the excavator for dredging which concerns on embodiment of this invention. It is a side view which shows the excavator for dredging which concerns on embodiment of this invention. It is a top view which shows the excavator for dredging which concerns on embodiment of this invention. It is a figure which shows the flow of the water of the lower part vicinity of a dredge excavator. It is a figure which shows the flow of the water of the lower part vicinity of a dredge excavator. It is the schematic which shows the scissors system which concerns on embodiment of this invention. It is a figure which expands and shows the excavator for dredging of FIG. 6, and a travel means. It is a figure which shows the state in which the excavator for dredging which concerns on embodiment of this invention is inclined forward toward the advancing direction. It is a figure which shows the state which the excavator for dredgings concerning embodiment of this invention inclines in the direction on the opposite side to the advancing direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavator for dredging 2 Deposit 3 Horizontal shaft 4 Cutter 4a Radial end 4b Axial end 5 Cutter 5a Radial end 5b Axial end 6 Discharge device 7 Housing 8 Cutter drum 9 Bit 10 Suction nozzle 10a Suction port 11 Sand pump 12 Hose 13 Skirt 14 Width direction skirt portion 15 Travel direction skirt portion 16 Dredging system 17 Carrier 18 Traveling means 18a Telescopic boom 18b Wire rope 19 Transport ship 20 Ultrasonic measuring device 21 Inclinometer 22 Depth meter 23 Electronic bearing meter 24 Mud pipe

Claims (9)

A cutter that is rotatable about a horizontal axis and that excavates sediment deposited at the bottom of the dam reservoir, a discharge device that sucks and discharges the sediment excavated by the cutter, and an upper portion of the cutter An excavator for dredging provided with a frame for supporting the cutter and storing the discharge device,
The cutter has an end in the horizontal axis direction and a direction perpendicular thereto projecting outward in the horizontal direction from the casing, and a skirt for enclosing the upper portion of the cutter is attached to a lower portion of the casing , An excavator for dredging, wherein an end of the cutter in a direction perpendicular to the horizontal axis direction protrudes outward in the horizontal direction from the skirt .   The excavator for dredging according to claim 1, further comprising an inclinometer for measuring an inclination angle, and a depth meter for measuring the water depth of the cutter.   The excavator for dredging according to claim 1 or 2, further comprising a position detection device for detecting a horizontal position of the cutter. The said skirt is comprised so that the surface parallel to the direction orthogonal to the said horizontal axis direction may be extended below rather than the surface parallel to the said horizontal axis direction. The dredge excavator according to claim 1. A dredge system for excavating and discharging sediment deposited at the bottom of a dam reservoir,
An end of the cutter for excavating the deposit that is rotatable about a horizontal axis and extending in the horizontal axis direction and in a direction orthogonal thereto is provided so as to protrude outward in the horizontal direction from the casing supporting the cutter. A skirt for enclosing the upper portion of the cutter is attached to the lower portion of the casing , and an end portion of the cutter perpendicular to the horizontal axis direction protrudes outward in the horizontal direction from the skirt. A cocoon system characterized by comprising: 6. The dredge system according to claim 5 , wherein the dredge excavator includes an inclinometer for measuring an inclination angle and a depth meter for measuring a water depth of the cutter. The dredge system according to claim 5 or 6 , wherein the dredge excavator further includes a position detection device for detecting a horizontal position of the cutter. The said skirt is comprised so that the surface parallel to the direction orthogonal to the said horizontal axis direction may be extended below rather than the surface parallel to the said horizontal axis direction. The dredge system according to claim 1. Dredging system according to any one of claims 5-8, characterized by further comprising an ultrasonic measuring device for measuring the topography of the bottom of the dam reservoir.

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