JP2006200132A - Dredging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dredging device capable of efficient dredging in response to an alluvium state of a sand pocket. <P>SOLUTION: A plurality of dredging pumps 8 are suspended in a sedimentary sand section 3 of the sea bottom from a pier 7 arranged in a sand sedimentary place 5. A flowmeter 21 and a pressure gauge 22 arranged in a water supply pipe 19 connected to a high pressure water injection pipe 14 and a jet pipe 17, a densitometer 24, the flowmeter 21 and the pressure gauge 22 arranged in a sand removal pipe 16, an anemometer 25 and a wave height meter 26 arranged in the pier 7, and a shape measuring instrument 10 for measuring a shape of the sand pocket 9 arranged in the vicinity of the respective dredging pumps 8, are respectively electrically connected to a computer 11 of a control room. A centrifugal pump 18 and opening-closing of an automatic valve 20 is controlled by these data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dredge apparatus.

Conventionally, in the sand bypass method of delivering sand sucked up by a plurality of dredging pumps 30 suspended at appropriate intervals on a pier 29 installed in the sedimentation unit 28 to an erosion unit or the like, the dredging pump 30 is operated as follows: As shown in FIG. 5, the operator measures the state of sedimentation in the sand pocket 31, and determines which of the plurality of dredge pumps 31 is to be operated from the result. As another scissor device, for example, there is an invention of JP-A-2002-266369.
JP 2002-266369 A

  However, the operation of the dredging pump as described above does not automatically change the amount of water to be supplied or the pressure depending on the situation, but simply performs unmanned operation under the same conditions. I couldn't make the most efficient dredging.

  This invention is made | formed in view of the above problems, The objective is to provide the dredging apparatus which can carry out the dredging efficiently according to the sedimentation condition of a sand pocket.

  The dredging device of the present invention has a plurality of dredging pumps suspended from a pier installed at a place where sand is accumulated, to a sedimentation portion on the seabed, and the dredging pump includes high-pressure water provided with an ejector nozzle at a tip. An injection pipe, the ejector nozzle is located in the vicinity of the suction port, a sand discharge pipe for sucking and delivering surrounding earth and sand water by jetting high-pressure water into the suction port, and a jet pipe located below the suction port; Centrifugal pump, automatic valve, flow meter, pressure gauge installed in the water supply pipe connected to this high pressure water injection pipe and jet pipe, density meter, flow meter, pressure installed in the sand discharge pipe The meter, the anemometer and wave height meter installed on the pier, and the measuring instrument for measuring the shape of the sand pocket installed in the vicinity of each dredge pump were each electrically connected to the computer in the control room. Special To. Further, the centrifugal pump includes that the rotational speed is controlled by a command from a computer.

  The data of sedimentation and dredging conditions in the sand pocket from the shape measuring instrument that measures the shape of the sand pocket is taken into the computer and analyzed, and the opening of the automatic valve and the rotation control of the centrifugal pump are controlled based on the results. This makes it possible to perform the most efficient operation of the soot pump. In addition, the above data can be used to determine which part of the jetty has a lot of sediment and which jet pump has little capacity. It can be deepened, or the installation interval of the dredge pump can be reduced. On the other hand, it is possible to reduce the capacity of dredging pumps in places where there is little accumulation, shallower installation positions of dredging pumps, and increase the intervals between dredging pumps. The running cost can be reduced. Moreover, since the dredging pump can be automatically operated by a command (signal) from the computer, it is possible to prevent human error (accident) and to reduce labor costs.

  Hereinafter, embodiments of a dredge apparatus according to the present invention will be described with reference to the drawings. First, the configuration of the dredge apparatus will be described, and then the operation of the dredge apparatus will be described.

  As shown in FIG. 1, when there is a structure 2, such as a port, fishing port, jetty, etc. in a direction perpendicular to the coastline 1, the coastal drift sand (sand moving parallel to the coast due to waves incident on the coast diagonally) On the upper side with respect to the prevailing direction, the sediment portion 3 is formed, whereas the lower portion is formed with the erosion portion 4, so that the sand is sucked up from the sediment portion 3 and delivered to the erosion portion 4. A dredging device 6 is installed at a location 5 where sand is deposited.

  As shown in FIG. 2, the dredger device 6 includes a pier 7 installed at a location 5 where sand is accumulated, and a plurality of dredging pumps 8 suspended from the pier 7 to the sediment portion 3 on the seabed. From a shape measuring instrument 10 for measuring the shape of the sand pocket 9 formed by the dredge pump 8 and a personal computer (hereinafter referred to as a personal computer) 11 for controlling the operation of the dredge pump based on data from the shape measuring instrument 10 It is configured.

  As shown in FIG. 3, the dredge pump 8 includes a high-pressure water injection pipe 14 having an ejector nozzle 13 at a distal end portion 12 bent in a U shape, and the ejector nozzle 13 is located in or near the suction port 15. The suction port 15 includes a sand discharge pipe 16 that sucks and delivers surrounding soil water by jetting high-pressure water into the suction port 15, and a jet pipe 17 located below the suction port 15.

  A high-pressure water injection pipe 14 and a jet pipe 17 are connected to a water supply pipe 19 provided with a centrifugal pump 18 in two branches. The centrifugal pump 18 connects the high-pressure water injection pipe 14 and the jet pipe 17 with high-pressure water. Is being supplied with water. The centrifugal pump 18 is electrically connected to the personal computer 11 in the control room, and rotation control is performed by a command (signal) from here.

  Further, in the water supply pipe 19 branched into two, an automatic valve 20, a flow meter 21 and a pressure gauge 22 are respectively installed in order toward the dredging pump 8 side, and these are electrically connected to the personal computer 11. The automatic valve 20 is automatically opened / closed by a signal from.

  A density meter 24, a flow meter 21, and a pressure gauge 22 are also installed in order toward the dredging pump 8 side in the sand discharge pipe 16 that pumps earth and sand to the dredging 23, and the density of the sediment water measured by these, The flow rate and pressure data of earth and sand water is automatically transmitted to an electrically connected personal computer 11.

  The shape measuring instrument 10 for measuring the shape of the sand pocket 9 is installed in the vicinity of the dredge pump 8, and the shape of the sand pocket 9 formed by the operation of the dredge pump 8 and the accumulation state of sand drift in the sand pocket 9. And automatically send the data to an electrically connected personal computer 11 such as a sound detector, scanning sonar, narrow multibeam sonar, earth pressure gauge, autolet, underwater camera, etc. It is made up of.

  An anemometer 25 is provided on the top surface of the pier 7 and a wave height meter 26 is provided on the bottom surface of the pier 7. The wind speed data from the anemometer 25 and the wave height data from the wave height meter 26 are electrically connected. Is automatically transmitted to the personal computer 11 connected to the.

  The personal computer 11 in the control room is input with data indicating that the dredge pump 8 cannot be operated due to the season, time zone, wind power and wave power. Therefore, when all these conditions are satisfied, the dredge pump 8 can be operated by a command (signal) from the personal computer.

  Next, the operation of the saddle device 6 will be described with reference to the flowchart of FIG. First, in step (hereinafter referred to as ST) 1, the operating conditions of the dredge device 6 are input to the personal computer 11. This is because, depending on the region where dredging is performed, the dredging pump 8 may not be able to be operated due to the season, time zone, wind force, and wave power, so the above conditions in the region where the dredging device 6 is installed are determined and input. For example, driving is not possible at night due to noise problems, driving is not possible for bathers in the summer, and driving is not safe when the wave height is high.

  Next, in ST2, based on the wind speed data from the anemometer 25 of the jetty 7, the wave height data from the wave height meter 26, date data and time data, it is determined whether or not the above operating conditions are satisfied. When it is determined that the above operating conditions are not satisfied, the dredging pump 8 is put into operation standby. On the other hand, if it is determined that the above operating conditions are satisfied, the process proceeds to ST3, and the state of sedimentation in the sand pocket 9 is determined.

  The condition of sedimentation in the sand pocket 9 is whether there is sediment in the sand pocket 9 based on measurement data from a scanning sonar in the shape measuring instrument 10 installed in the vicinity of the dredge pump. Make a decision. When it is determined that there is no sediment in the sand pocket 9, the dredge pump 8 in the sand pocket 9 without sediment is put on standby. On the other hand, if it is determined that there is sediment in the sand pocket 9, the process proceeds to ST4 and the operation of the dredge pump 8 in the sand pocket 9 where sediment is present is determined.

  Next, the automatic valve 20 (installed in the water supply pipe 19) of the dredging pump 8 determined to operate in ST5 is opened, and the centrifugal pump 18 for supplying high-pressure water is operated. In ST6, the dredge pump 8 is operated by the operation of the centrifugal pump 18.

  As shown in FIG. 3, when high-pressure water is supplied to the high-pressure water injection pipe 14 by the centrifugal pump 18, the high-pressure water is jetted from the ejector nozzle 13 to the suction port 15. The surrounding earth and sand are sucked from the suction port 15. On the other hand, when high-pressure water is supplied to the jet pipe 17 by the centrifugal pump 18, this is jetted from the jet nozzle 17 a of the jet pipe 17 toward the suction port 15, and the earth and sand are spouted toward the suction port 15. Also, the earth and sand sucked from the suction port 15 is delivered from the sand discharge pipe 16 to the basket 23.

  Next, in ST7, the data from the density meter 24, the flow meter 21, and the pressure gauge 22 are processed by the personal computer 11 to calculate the mud content, the soot amount, and the soot efficiency.

  Next, based on these mud content, soot amount and soot efficiency, it is determined in ST8 whether or not to continue the operation of the soot pump 8. At this time, if it is determined that the mud content is zero, the operation of the centrifugal pump 18 is stopped in ST9, and the corresponding automatic valve (installed in the water supply pipe 19) 20 is closed and the dredge pump 8 is put into operation standby. Become.

  On the other hand, if it is determined that the mud content is other than zero, the automatic management is determined in ST10 and the operation of the dredge pump 8 is continued. In the case of this automatic management, the efficient operation of the dredging pump 8 is monitored based on the mud content, dredging amount and dredging efficiency data calculated in ST11 in ST11 so that this efficient operation can be performed. The rotational speed of the centrifugal pump 18 and the opening / closing adjustment of the automatic valve 20 of the water supply pipe 19 connected to the jet pipe 17 are performed.

  Such an operation of the saddle device 6 makes it possible to perform efficient dredging, thereby reducing running costs and preventing human error.

It is a top view of the dredge apparatus installed in the sedimentation part. It is a conceptual diagram of a dredge apparatus. It is sectional drawing of the pump for dredging. It is a flowchart of an operation | movement of a dredge apparatus. It is sectional drawing of the conventional dredge apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coastline 2 Structures 3, 28 Sedimentation part 4 Erosion part 5 The place where sand was accumulated 6 Dredging device 7, 29 Pier 8, 30 Dredging pump 9, 31 Sand pocket 10 Shape measuring instrument 11 Personal computer 12 Tip part 13 Ejector Nozzle 14 High-pressure water injection pipe 15 Suction port 16 Sand discharge pipe 17 Jet pipe 17a Jet nozzle 18 Centrifugal pump 19 Water supply pipe 20 Automatic valve 21 Flow meter 22 Pressure gauge 23 ２４ 24 Density meter 25 Anemometer 26 Wave height meter 27 Skirt part

Claims (2)

  A plurality of dredging pumps are suspended from a pier installed at a place where sand is accumulated to a sediment portion on the seabed, and the dredging pump includes a high-pressure water injection pipe having an ejector nozzle at a tip, and the ejector nozzle Is located in the vicinity of the suction port, and is composed of a sand discharge pipe for sucking and delivering the surrounding earth and sand water by jetting the high pressure water into the suction port, and a jet pipe located below the suction port. Centrifugal pump, automatic valve, flow meter, pressure gauge installed in water supply pipe connected to jet pipe and jet pipe, density meter, flow meter, pressure gauge installed in sand pipe, and installed on jetty An anemometer, a wave height meter, and a measuring instrument for measuring the shape of a sand pocket installed in the vicinity of each dredging pump are each electrically connected to a computer in a control room.   2. The dredge device according to claim 1, wherein the centrifugal pump has a rotational speed controlled by a command from a computer.

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