CSBC

Abstract

To provide a barge capable of stably sailing in the space with a low head height.SOLUTION: A barge comprises a mounting table 102 which is installed at a tip and on which a backhoe 2 is mounted. The vertical surface position of the mounting table 102 is lower than a water line of the mounting table with a heavy duty machine mounted and installed such that water enters on the mounting table 102. A floater 103 is installed in front of the mounting table 102 in the sailing direction and floaters 104a, 104b are installed on the side of the mounting table 102 in the sailing direction. A mud conveying pipe for conveying mud collected by a mud collection apparatus 22 of the backhoe 2 to a suction-pumping tank chamber 305 installed on the rear end part of the barge 1 is placed, at least from the tip in the sailing direction to the rear end of the mounting table 102, below the floor surface where the suction-pumping tank chamber 305 is placed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a pontoon, and more particularly to a pontoon capable of stable navigation.

Background Art

[0002] A pontoon equipped with an excavator for dredging work is generally well known. When this pontoon sails in a low-headroom environment such as under a bridge girder in a river or at sea, there is a possibility that working machines such as the arm and boom of the excavator may contact the bridge girder and damage the bridge girder.

[0003] For example, Patent Document 1 discloses a technique related to a dredging work system including a work pontoon, a heavy machine mounted on the work pontoon, and control means for controlling the entire system. The heavy machine is an excavator having a working machine composed of a boom, an arm, and a bucket, and it is described that the slewing platform of the excavator is directly installed on the work pontoon.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the dredging work system described in Patent Document 1, since the slewing platform of the excavator is directly installed on the work pontoon, the attachment position to the main body portion of the boom is high. Therefore, the boom, the arm, and the position of the upper part of the main body are high, and there is a high possibility that these may contact objects to be guarded against contact such as bridge girders and bridge piers above during the navigation of the work ship.

[0006] In addition, since the positions of the boom, the arm, and the upper part of the main body are high, there is a problem that the center of gravity of the work ship when the excavator is placed is high and becomes unstable.

[0007] The present invention has been made in view of the above problems, and an object thereof is to provide a mother ship that can stably navigate in a low-clearance environment.

Means for Solving the Problems

[0008] To solve the above object, the first feature of the mother ship according to the present invention is provided at the tip and equipped with a mounting table for mounting heavy machinery, the position of the surface of the mounting table in the vertical direction is lower than the waterline and is provided so that water can enter the mounting table.

Effects of the Invention

[0009] According to the mother ship of the present invention, it is possible to stably navigate in a low-clearance environment.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent parts and components are denoted by the same or equivalent reference numerals throughout the drawings. However, it should be noted that the drawings are schematic and different from the actual ones. Also, there are parts where the dimensional relationships and ratios are different between the drawings.

[0012] In addition, the embodiments described below illustrate devices and the like for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the arrangement of each component and the like as the following. The technical idea of the present invention can be variously modified within the scope of the claims.

[0013] FIG. 1 is a plan view of a pontoon according to an embodiment of the present invention, FIG. 2 is a front view of the pontoon according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken along the A1-A2 section shown in FIG. 1 of the pontoon according to an embodiment of the present invention, and FIG. 4 is a perspective view of the pontoon according to an embodiment of the present invention. Hereinafter, the left-right direction and the up-down direction will be described as the left-right direction and the up-down direction with respect to the plane of FIG. 2, respectively, and the direction toward the plane of FIG. 2 will be described as the front direction, and the direction away from the plane of FIG. 2 will be described as the rear direction.

[0014] The pontoon 1 according to an embodiment of the present invention is equipped with various devices such as an excavator 2 and a pumping device 3 for performing a so-called dredging operation of collecting and processing the mud deposited on the bottom of a river, pond, lake, sea, or the like.

[0015] On the upper plate 101 of the pontoon 1, a pumping device 3, pontoon cranes 41 and 42, spatulas 51 and 52, a power generation device 6, and a control room 7 are provided.

[0016] In addition, a mounting table 102 is provided on the front side of the pontoon 1, which is located below the upper plate 101. An excavator 2 having a weight of about 1 (t) to 3 (t) is mounted on this mounting table 102, and a mud collecting device 22 is connected to the tip of the boom 21 of the excavator 2. The excavator 2 can rotate, and the boom 21 can move the mud collecting device 22 up and down by a link mechanism and can be held horizontally.

[0017] In front of the mounting table 102 of the pontoon 1, a float 103 having buoyancy is connected, and the position of the surface (upper surface) of this float 103 is at the same level as the mounting table 102 in the vertical direction. By connecting the float 103 in front of the mounting table 102, when the backhoe 2 is placed on the mounting table 102, it is possible to prevent the mounting table 102 from sinking more than necessary while facilitating the intrusion of water into the mounting table 102, and to maintain a good balance in the longitudinal direction of the pontoon 1.

[0018] Also, on both sides in the left - right direction of the mounting table 102 of the pontoon 1, floats 104a, 104b having buoyancy are connected, and the positions of the surfaces of these floats 104a, 104b are at the same level as the upper plate 101 in the vertical direction. By connecting the floats 104a, 104b to the side of the mounting table 102, since the surfaces of the floats 104a, 104b are located above the waterline, it is possible to improve the stability in the left - right direction when the backhoe 2 is placed on the mounting table 102.

[0019] When the backhoe 2 is placed on the mounting table 102, as shown in FIG. 2, the level (position) L3 of the surface of the mounting table 102 in the vertical direction is lower than the draft level L1 when the backhoe 2 is placed, and it is provided so that water can enter the mounting table 102.

[0020] Since the mounting table 102 is provided at a low position, the backhoe 2 can be placed at a low position, and the level (position) L2 of the highest part of the backhoe 2 body can be lowered. In FIG. 2, the spatulas 51, 52 are at positions higher than the level (position) L2, but during the navigation of the pontoon 1, the height can be adjusted to be lower than the level (position) L2.

[0021] In this way, since the level (position) L3 of the surface of the mounting table 102 is provided to be lower than the draft level L1 when the backhoe 2 is mounted, the backhoe 2 can be mounted at a low position, and it is possible to prevent the boom, arm, and the upper part of the backhoe 2 main body from contacting contact warning objects such as bridge girders and bridge piers above during the navigation of the pontoon 1. That is, if the distance L from level L1 to level L2 of the pontoon 1 is shorter than the distance from level L1 to contact warning objects such as bridge girders and bridge piers, the pontoon 1 can navigate rivers and the like without contacting contact warning objects such as bridge girders and bridge piers.

[0022] Also, since the center of gravity is lowered, the pontoon 1 can navigate stably. Furthermore, since the backhoe 2 can be mounted at a low position, the mud collecting device 22 can reach a deeper water bottom, so that mud at a deeper position can be recovered.

[0023] The pumping device 3 pumps the dredged mud at the water bottom dredged by the mud collecting device 22. Details will be described later.

[0024] The pontoon cranes 41 and 42 are heavy machines for maintaining the pontoon 1 main body and devices such as the pumping device 3 and the power generation device 6 provided on the pontoon 1.

[0025] The spatulas 51 and 52 are provided at both ends of the pontoon 1 in the left-right direction. When the pontoon 1 moves to the dredging location, the spatulas 51 and 52 are lowered and driven into the water bottom to fix the position of the pontoon 1. As described above, the spatulas 51 and 52 are provided to be height-adjustable in the vertical direction. Specifically, the spatulas 51 and 52 are each composed of a plurality of parts, and can be extended upward by connecting the parts. Also, by disassembling the spatulas 51 and 52 to which the parts are connected and extended, respectively, the level (position) of the topmost part can be made lower than the level (position) L2 of the highest part of the backhoe 2 main body.

[0026] The power generation device 6 supplies power to various electric devices arranged on the pontoon 1 such as the pumping device 3.

[0027] The control room 7 has a control device inside, and by the operator operating the control device, dredging work can be carried out.

[0028] The pressure feeding device 3 includes a first mud conveying pipe 301, a first pressurizing compressor 302, a second pressurizing compressor 303, a suction compressor 304, a suction and pressure feeding tank chamber 305, a separator tank 306, and an instrumentation compressor 307.

[0029] The first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304 are at the central part in the width direction (left - right direction) of the pontoon 1 and are arranged in a straight line in the navigation direction (front - rear direction) from the front end part to the rear end part of the pontoon. By arranging the relatively heavy first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304 in this way, the stability of the pontoon 1 is further improved. Also, the control room 7 is also arranged at the central part in the width direction (left - right direction) of the pontoon 1 with respect to the first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304 and is arranged in a straight line in the navigation direction (front - rear direction). Note that the control room 7, the first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304 only need to be arranged in a straight line and may be arranged with a slight shift in the width direction (left - right direction).

[0030] The first mud conveying pipe 301 conveys the dredged mud at the bottom of the water dredged by the mud collecting device 22 of the backhoe 2 to the suction and pressure feeding tank chamber 305 provided at the rear end part of the pontoon 1. As shown in FIG. 3, this first mud conveying pipe 301 is arranged below the upper plate 101 on which the suction and pressure feeding tank chamber 305 is placed from the front end part R1 in the navigation direction (front - rear direction) to the rear end part R2 of the mounting table 102. Also, in this embodiment, it is arranged below the upper plate 101 from the rear end part R2 of the mounting table 102 to the rear end part R3 of the suction compressor 304. And the rear side of the rear end part R3 of the first mud conveying pipe 301 is arranged above the rising upper plate 101.

[0031] Further, when the first mud delivery pipe 301 is arranged below the control room 7 arranged at the central part in the width direction (left - right direction) of the barge 1, the first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304, the workability deteriorates during maintenance work such as replacement and cleaning of piping components. Therefore, as shown in FIGS. 1 and 2, the first mud delivery pipe 301 is arranged on the left side in the left - right direction of the control room 7, the first pressurizing compressor 302, the second pressurizing compressor 303, and the suction compressor 304 so as to avoid the area below them, from the front. Here, it is arranged on the left side, but it may be arranged on the right side instead.

[0032] In this way, at least from the tip R1 in the navigation direction (front - rear direction) to the rear end R2 of the mounting table 102 of the first mud delivery pipe 301 that conveys the dredged mud at the bottom dredged by the mud collecting device 22 to the suction pressure - feeding tank chamber 305 provided at the rear end part of the barge 1, since it is arranged below the floor surface (upper plate 101) on which the suction pressure - feeding tank chamber 305 is mounted, the center of gravity of the barge 1 can be lowered, and interference of the mud collecting device 22 can be prevented.

[0033] Next, the configuration of the pressure - feeding device 3 provided on the barge 1 according to an embodiment of the present invention and the pressure - feeding operation by the pressure - feeding device 3 will be described.

[0034] FIG. 5 is a schematic configuration diagram of the pressure - feeding device provided on the barge 1 according to an embodiment of the present invention. The pressure - feeding device 3 is controlled by a control device installed in the control room 7.

[0035] The mud collecting device 22 and the first mud conveying pipe 301 are connected by a flexible hose, and the downstream end of the first mud conveying pipe 301 branches into a second mud conveying pipe 312 and a third mud conveying pipe 313. A first mud storage tank 314A is connected to the downstream side of the second mud conveying pipe 312, and a second mud storage tank 314B is connected to the downstream side of the third mud conveying pipe 313. The first mud storage tank 314A and the second mud storage tank 314B are installed inside the suction pressure conveying tank chamber 305.

[0036] A first sludge discharge pipe 315A is connected to the bottom of the first mud storage tank 314A, and a second sludge discharge pipe 315B is connected to the bottom of the second mud storage tank 314B. The first sludge discharge pipe 315A and the second sludge discharge pipe 315B merge at a confluence pipe 316 on the downstream side.

[0037] An external pressure conveying pipe 317 is connected to the confluence pipe 316, and this external pressure conveying pipe 317 is provided on a float (not shown) provided on the water surface.

[0038] The upstream end of a first suction pipe 320A is connected to the upper part of the first mud storage tank 314A, the upstream end of a second suction pipe 320B is connected to the upper part of the second mud storage tank 314B, and the downstream ends of the first suction pipe 320A and the second suction pipe 320B are connected to a suction confluence pipe 321 that constitutes one pipeline. A separator tank 306 is connected to this suction confluence pipe 321, and this separator tank 306 and a suction compressor 304 are connected by a downstream suction pipe 323.

[0039] A first suction valve 324A such as an electromagnetic on-off valve is provided in the first suction pipe 320A, and a second suction valve 324B such as an electromagnetic on-off valve is provided in the second suction pipe 320B. The suction compressor 304 selectively communicates with the first and second mud storage tanks 314A and 314B by switching the first and second suction valves 324A and 324B.

[0040] At the upper parts of the first and second sludge storage tanks 314A and 314B, one ends of the first and second connection pipes 325A and 325B are connected via the upstream end sides of the first and second suction pipes 320A and 320B, and the downstream sides of the first and second compressed air supply pipes 326A and 326B are connected to the other ends of these first and second connection pipes 325A and 325B. The upstream sides of these first and second compressed air supply pipes 326A and 326B merge through a supply merging pipe 327. A pair of branch pipes 328A and 328B are provided upstream of this supply merging pipe 327, and the first and second pressurizing compressors 302 and 303 are connected to these pair of branch pipes 328A and 328B.

[0041] Also, pressure valves 329A and 329B such as electromagnetic on-off valves are provided in the first and second compressed air supply pipes 326A and 326B. The first and second pressurizing compressors 302 and 303 selectively communicate with the first and second sludge storage tanks 314A and 314B by switching the pressure valves 329A and 329B.

[0042] Branch portions 330A and 330B are provided at the other ends of the first and second connection pipes 325A and 325B, and the first and second compressed air supply pipes 326A and 326B and the first and second atmosphere release pipes 331A and 331B are connected to these branch portions 330A and 330B. These first and second atmosphere release pipes 331A and 331B merge on the downstream side and are connected to an on-off valve 332. Also, first and second atmosphere release valves 333A and 333B such as electromagnetic on-off valves are provided in the first and second atmosphere release pipes 331A and 331B respectively before merging, and check valves 334A and 334B are provided in the first and second atmosphere release pipes 331A and 331B respectively on the downstream side before merging and before merging. These check valves 334A and 334B prevent backflow to the first and second sludge storage tanks 314A and 314B sides. Note that by connecting one ends of the first and second connection pipes 325A and 325B to the downstream sides of the first and second suction pipes 320A and 320B, one ends of the first and second connection pipes 325A and 325B communicate with the first and second sludge storage tanks 314A and 314B.

[0043] Next, the pumping operation by the pumping device 3 will be described. First, among the plurality of closed valves, the first suction valve 324A is opened, the suction compressor 304 is operated, and a negative pressure is applied to the first sludge storage tank 314A to reduce the pressure. As a result, the dredged soil at the bottom dredged by the sludge collecting device 22 is sucked into the first sludge storage tank 314A through the first mud delivery pipe 301 and the second mud delivery pipe 312.

[0044] When the air in the first sludge storage tank 314A is exhausted by the suction compressor 304, the exhausted air passes from the inside of the first sludge storage tank 314A through the first suction pipe 320A and the suction confluence pipe 321, and passes through the separator tank 306. As a result, the moisture and impurities in the air are dropped to the lower part of the tank body, and after the moisture and impurities in the air are removed, they are sucked by the suction compressor 304.

[0045] Here, when the dredged soil in the first sludge storage tank 314A reaches a fixed amount, the control device in the control room 7 closes the first suction valve 324A and opens the second suction valve 324B, so that the second sludge storage tank 314B communicates with the suction compressor 304, and a negative pressure is applied to the second sludge storage tank 314B by the suction compressor 304.

[0046] As a result, the dredged soil at the bottom dredged by the sludge collecting device 22 is sucked into the second sludge storage tank 314B through the first mud delivery pipe 301 and the third mud delivery pipe 313. At the same time, the dredged soil in the first sludge storage tank 314A is discharged. The discharge of the dredged soil in the first sludge storage tank 314A is carried out by opening the pressure valve 329A, operating the first and second pressurizing compressors 302 and 303 connected by the first compressed air supply pipe 326A, supplying compressed air into the first sludge storage tank 314A, and the dredged soil in the first sludge storage tank 314A is pressure-fed through the first sludge discharge pipe 315A to the confluence pipe 316.

[0047] After the dredged soil in the first sludge storage tank 314A has been completely discharged, the first and second pressurizing compressors 302 and 303 are stopped, the first atmosphere release valve 333A connected to the first sludge storage tank 314A is opened, and the emptied first sludge storage tank 314A is returned to atmospheric pressure.

[0048] Then, with the dredged soil in the second sludge storage tank 314B reaching a fixed quantity, the second suction valve 324B is opened, the first suction valve 324A is closed, the first sludge storage tank 314A and the suction compressor 304 are communicated, and a negative pressure is applied to the first sludge storage tank 314A by the suction compressor 304 to send the dredged soil into the first sludge storage tank 314A.

[0049] In this way, with the suction compressor 304 constantly operating, the suction, pressure feeding, and atmosphere release of the dredged soil are alternately performed between the first sludge storage tank 314A and the second sludge storage tank 314B to perform the suction and pressure feeding of the dredged soil at the bottom of the water.

[0050] Note that, as the heavy machine placed on the mounting table 102 of the barge 1 according to an embodiment of the present invention, the backhoe 2 has been described by way of example, but it is not limited thereto, and any heavy machine capable of moving the mud collecting device 22 up, down, left, and right may be used. The backhoe 2 placed on the mounting table 102 of the barge 1 according to an embodiment of the present invention may be fixed so as not to move on the mounting table 102. Further, it may have a locking mechanism so that the fixing does not easily come off.

[0051] Also, in the pontoon 1 according to an embodiment of the present invention, when the backhoe 2 is placed on the mounting table 102, the level (position) L3 of the surface of the mounting table 102 in the vertical direction is lower than the draft level L1 when the backhoe 2 is placed, and it is provided so that water can enter the mounting table 102. However, even when no heavy machinery is placed on the mounting table 102, it may be provided so that the level (position) L3 of the surface of the mounting table 102 is lower than the draft level L1. However, when no heavy machinery is placed on the mounting table 102, since the heavy machinery does not come into contact with the upper contact warning object, in order to ensure higher propulsion performance, when no heavy machinery is placed on the mounting table 102, the level (position) L3 of the surface of the mounting table 102 in the vertical direction is provided to be higher than the draft level when the heavy machinery is placed, and when the heavy machinery is placed on the mounting table 102, it is desirable that the level (position) L3 of the surface of the mounting table 102 in the vertical direction is lower than the draft level L1 when the heavy machinery is placed.

[0052] In addition, in one embodiment of the present invention, the pontoon 1 equipped with various devices such as the backhoe 2 and the pumping device 3 for performing dredging work to collect and process the mud deposited on the bottom of rivers, ponds, lakes, seas, etc. has been described. However, the use of the pontoon 1 is not limited to dredging work, and any pontoon capable of mounting heavy machinery can be used for all construction work in general.

[0053] (Appendix) This application discloses the following invention. (Appendix 1) It is provided at the tip and includes a mounting table for mounting a heavy machine. The position of the surface of the mounting table in the vertical direction is lower than the waterline, and it is provided so that water can enter the mounting table. A pontoon characterized by this. In this way, since the mounting table is provided at a low position, the heavy machine can be mounted at a low position, so that it is possible to prevent the heavy machine from contacting contact warning objects such as bridge girders and bridge piers above during the navigation of the pontoon. In addition, since the center of gravity is lowered, the pontoon can sail stably.

[0054] (Supplementary Note 2) The position of the surface of the mounting table in the vertical direction is provided lower than the waterline when the heavy machine is mounted The pontoon according to (Supplementary Note 1), characterized in that As a result, when no heavy machine is mounted on the mounting table, the position of the surface of the mounting table in the vertical direction may be higher than the waterline. In this case, since the heavy machine does not come into contact with the upper contact warning object, higher propulsion performance can be ensured

[0055] (Supplementary Note 3) A front float is provided in front of the mounting table The pontoon according to (Supplementary Note 1), characterized in that As a result, when a heavy machine is mounted on the mounting table, it is possible to prevent the mounting table from sinking more than necessary, and it is possible to maintain good balance in the longitudinal direction of the pontoon

[0056] (Supplementary Note 4) At least the tip of the mud delivery pipe that conveys the mud sucked by the suction part of the heavy machine to the tank provided at the rear end of the pontoon is arranged below the floor surface on which the tank is mounted, from the tip to the rear end of the mounting table The pontoon according to (Supplementary Note 1), characterized in that As a result, the center of gravity of the pontoon can be lowered, and it is possible to prevent the mud collecting device from interfering with the heavy machine

[0057] (Supplementary Note 5) Side floats are provided on the sides of the mounting table The pontoon according to (Supplementary Note 1), characterized in that As a result, the stability in the lateral direction when a heavy machine is mounted on the mounting table can be improved

[0058] (Supplementary Note 6) The compressed air supply means for supplying compressed air to convey the mud through the mud delivery pipe and the control means for controlling the compressed air supply means are arranged linearly from the front end to the rear end of the pontoon The barge according to (Supplementary Note 1), characterized by the following. By arranging the relatively heavy compressed air supply means and the control means in a straight line, the stability of the barge is further improved. Here, compressed air means compressed air.

Explanation of Signs

[0059] 1 Barge 2 Backhoe 3 Pressure feeding device 6 Power generation device 7 Control room 22 Mud collecting device 41, 42 Cranes for barge 51, 52 Spat 101 Upper plate 102 Mounting table 103 Floater (front floater) 104a, 104b Floaters (side floaters) 301 First mud delivery pipe 302 First pressurizing compressor (compressed air supply means) 303 Second pressurizing compressor (compressed air supply means) 304 Suction compressor (compressed air supply means) 305 Suction pressure feeding tank room 306 Separator tank 307 Instrumentation compressor 312 Second mud delivery pipe 313 Third mud delivery pipe 314A First mud storage tank 314B Second mud storage tank

Claims

1. It is provided with a mounting table at the front end for mounting a heavy machine, when the heavy machine is not mounted on the mounting table, the position of the surface of the mounting table in the vertical direction is set higher than the waterline so that water does not penetrate, and when the heavy machine is mounted on the mounting table, the position of the surface of the mounting table in the vertical direction is set lower than the waterline so that water penetrates into the mounting table. A pontoon characterized by the above.

2. A front floating body is provided in front of the mounting table The pontoon according to claim 1, characterized by the above.

3. At least from the tip to the rear end of the mud conveying pipe that conveys the mud sucked by the suction part of the heavy machine to the tank provided at the rear end of the pontoon, it is arranged below the floor surface on which the tank is mounted. The pontoon according to claim 1, characterized by the above.

4. A side floating body is provided on the side of the mounting table The pontoon according to claim 1, characterized by the above.

5. The compressed air supply means for supplying compressed air to convey the mud through the mud conveying pipe and the control means for controlling the compressed air supply means are arranged in a straight line from the front end to the rear end of the pontoon. The pontoon according to claim 3, characterized by the above.

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