JP4677752B2 - 浚 渫 Conveyor - Google Patents

Description

  The present invention relates to a dredging transport device for dredging sediment such as a dam lake and transporting it to a treatment plant.

  In dam lakes, harbors, rivers, etc. (hereinafter referred to as “dam lakes”), sand pumps have conventionally been mainly used for sediment dredged sediment deposited on the bottom of the lake.

  The sand pump is a submersible pump equipped with a disturbing blade called a cutter fan in the pump suction section. The cutter fan rotates, the sediment deposited on the bottom of the lake is disturbed and suspended by the cutter fan, and the sediment is sucked together with the water flow by the pump. In addition, it is conveyed to a predetermined place with a flexible pipe.

  For example, Patent Documents 1 and 2 have already been proposed as dredging means using a sand pump or a suction pump.

  The “mud sampling device” of Patent Document 1 is intended to selectively trap light organic matter in the bottom of the water without turbidity of the water area, and as shown in FIG. (Not shown), a hood 56 whose opening faces the bottom of the water, a jet nozzle 57 that floats sediment on the bottom of the water, a skirt 58 provided at the bottom of the hood, and a suction port provided at a predetermined height position. The sand pump 59 is provided.

Patent Document 2 “Drawing Method and Device” aims to reduce the pollution of the sea area by circulating the drainage separated from the dredged earth and sand without releasing it. As shown in FIG. Sediment is collected by the pump 61, the sediment is separated by the separation means 65, the drainage is recirculated by the drainage pump 67, and the refluxed drainage is pressurized by the pressure pump 62 and ejected from the jet nozzle 66 in the vicinity of the saddle to deposit The suction effect is improved by reversely ejecting from the eject nozzle 64 provided at the center of the trumpet pipe 63.
Japanese Patent Application Laid-Open No. 5-311696, “Mudging Device” Japanese Patent Application Laid-Open No. 2002-266369, “Amber Method and Apparatus”

  As described above, the conventional sand pump uses the principle that the stirring blade rotates in the water away from the lake bottom and rolls up the sediment by the swirling flow. For this reason, there is a problem that the mixed sand ratio of the sediment in the suction water is only about 10 to 15%. When the sedimentation surface is consolidated, a drilling blade is used instead of a fan, but the mixed sand ratio is similar in this case.

  Moreover, since the apparatus of patent document 1 uses a jet nozzle together, it can soar a deposit with jet water, but since the suction port of the sand pump is away from the bottom of the water, the suction force is weak and the mixed sand ratio There was a problem that could not be raised.

  Moreover, although the apparatus of patent document 2 can spout the earth and sand deposited with the jet nozzle, there existed a problem that the suction force generated with a trumpet pipe and an eject nozzle is weak, and similarly, a mixed sand ratio cannot be raised.

  The present invention has been made to solve such problems. That is, an object of the present invention is to provide a dredging transport device capable of dredging sediment deposited on the bottom of the water efficiently and with a high mixed sand ratio and capable of directly transporting the collected sediment to a remote treatment plant. It is in.

According to the present invention, in the dredger transport device that traps the sedimented sediment and transports it to the treatment plant, the articulated arm device that has an articulated arm whose tip can be raised and lowered and is mounted on a trolley, A suction sand discharger having a suction port and supported by the tip arm of the articulated arm; and a flexible transport pipe connecting between the discharge port of the suction sand discharger and the treatment site, and the suction The sand discharger includes a sand discharge pump, a variable adjustment suction pipe that variably adjusts a horizontal distance between the suction port and the sedimentation surface, and a flexible connection that connects between the variable adjustment suction pipe and the suction port of the sand discharge pump. The variable adjustment suction tube is attached to the tip of the tip arm so as to be swingable and extends vertically, and slides up and down below the hollow suction tube. The lower end opening can be used as the suction port. A suction tube, and a linear actuator that can move the movable suction tube up and down relative to the hollow suction tube. The linear actuator includes a spring that biases the movable suction tube upward, and a compressed air A single-acting pneumatic cylinder that is in an operating state when supplied and forcibly descends the movable suction tube against the urging force of the spring, and the inside of the suction pipe or the hollow suction tube A pressure control device for controlling the supply of compressed air to the pneumatic cylinder so that the pressure detected by the pressure detector falls within a pressure range suitable for sand discharge by a sand discharge pump. Is provided with a first feature of being connected .

According to the present invention, in addition to the first feature, there is provided a scissor transporting device characterized in that a suction port flange extending in a radial direction is attached to the lower end of the movable suction tube, In addition to the first or second feature, a third feature is that a jet nozzle for injecting jet water toward the lower side of the suction port is attached to the suction port flange. Further, the first to third features are also provided. In addition to any of the above features, there is provided a dredging conveyance device characterized in that the sand removal pump is an ejector pump, and further includes a high-pressure water supply device for supplying high-pressure water to be injected to the ejector pump on a carriage. The

According to the present invention, the suction Haisuna device has a variable adjusting suction tube, since the distance between the inlet and the sedimentation surface of the sediment was adjustable, inlet and sedimentary to increase the混砂rate The sand surface should be at a minimum distance, and the sand suction pump can efficiently suck in the sediment with a high sand mixing rate, and if the suction port is adsorbed on the sediment surface, the suction port should be lifted to prevent suction. Can do.

  In addition, a flexible transport pipe that communicates the discharge port of the sand discharge pump and the remote treatment plant is provided, so that continuous sand discharge can be performed by the pump while the suction sand discharge device is submerged near the sedimentation surface. Very efficient sand removal can be realized.

Further, the pressure inside the suction pipe or hollow suction tube detects, since the pressure detected by the pressure control apparatus for controlling the linear actuator so that the pressure range suitable for the sediment by Haisuna pump, hollow When the suction pipe is lowered appropriately, a strong water flow is generated between the inlet flange and the sedimentation surface of the lake bottom, and sand is discharged with a high sand mixing rate, and the hollow suction pipe is lowered too much and adheres to the sedimentation surface. the, since the discharge amount pressure decreases rapidly in the suction pipe is reduced, it is possible to them returning Re flow by contracting the linear actuator when it becomes less monitored set value by the pressure detector.

In particular, according to the invention of claim 3, by sucking while jetting water jet from a jet nozzle , even when the sedimentary surface is compacted, the sedimentary surface is broken with jet water and efficient with a high sand mixing rate. I can inhale well.

According especially to the fourth aspect of the present invention, a Haisuna pump ejector pump, by providing a high-pressure water supply device to the base board, it is possible to drive the Haisuna pump only the high pressure water jet, structure Simple and reliable, and the sand mixing rate can be increased to about 50%.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram illustrating a first embodiment of a bag transport apparatus according to the present invention. As shown in this figure, the dredge transport device of the present invention includes an articulated arm device 10, a transport pipe 16, a high-pressure water supply device 18, and a suction sand discharge device 20.

  The articulated arm device 10 includes a swivel base 10b that swivels on a traveling mechanism (crawler or the like) 10a, and articulated arms 10c and 10d that are pivotally supported by the swivel base 10b. It swings on the traveling mechanism, swings around each joint, and the suction sand removal device 20 attached to the tip of the joint can freely move up and down and turn. The articulated arm device 10 is placed on the carriage 9 so as to be movable by a traveling mechanism.

  The articulated arm device 10 may be partially modified from a well-known civil construction machine (for example, a backhoe) equipped with an articulated arm, or may be newly designed and constructed as long as the configuration of the present invention is satisfied. It may be manufactured.

  The conveyance pipe 16 is a flexible flexible pipe that communicates the discharge port of the sand discharge pump that constitutes the suction sand discharge device 20 with the treatment site that is remote from the discharge port. The conveyance pipe 16 is guided to the carriage along these articulated arms 10c and 10d so as not to hinder the operation of the articulated arms 10c and 10d, and is directly connected to a remote treatment plant provided on a quay or the like.

  The high-pressure water supply device 18 is provided on the carriage, preferably on the swivel base 10b, and supplies high-pressure water to an ejector pump, which will be described later, via a high-pressure water flexible pipe 18a.

  FIG. 2 is a partially enlarged view of FIG. As shown in this figure, the suction sand discharger 20 includes a sand discharge pump 22, a flexible suction pipe 24, a jet nozzle 26, and a variable adjustment suction pipe 30.

  The sand discharge pump 22 is attached to the tip arm 10d of the multi-joint arms 10c, 10d, and moves up and down together with the tip arm 10d. In addition, the attachment position of the sand removal pump 22 is not limited to this example, You may attach to another arm or a variable adjustment suction pipe.

  In this example, the sand discharge pump 22 is an ejector pump, and by injecting the high-pressure water 1 into the inside from the injection port 22a, the sand 2 is sucked together with water from the suction port 22b by the negative pressure generated inside, It discharges from the discharge port 22c.

  The ejector pump preferably has an air suction line (not shown) and forms a plug flow containing air in the transport pipe 16. Experiments have confirmed that this configuration can increase the sand mixing ratio to about 50%.

  The suction pipe 24 is a flexible flexible pipe that communicates the suction port 22 b of the sand discharge pump and the variable adjustment suction pipe 30.

  A plurality of jet nozzles 26 are preferably attached to the lower end of the variable adjustment suction pipe 30 and jet water is sprayed downwardly from the suction port for the sediment, so that the sediment surface can be removed even when the sediment surface is consolidated. It breaks down with jet water.

  In FIG. 2, the variable adjustment suction tube 30 includes a hollow suction tube 32, a movable suction tube 34, a suction port flange 36, and a linear motion actuator 38.

  The hollow suction tube 32 is attached to the distal arm 10d so as to be swingable by an actuator (not shown). The movable suction tube 34 is watertightly fitted to the lower end of the hollow suction tube 32 and is configured to be freely movable in the axial direction thereof.

  The suction port flange 36 is attached to the lower end of the movable suction pipe 34 and is configured in a shape (for example, a circle or a rectangle) that expands in the radial direction. The suction port flange 36 has, for example, an outer diameter that is two to three times the diameter of the movable suction tube 34 and has a smooth bottom surface so that a water flow smoothly flows from the outer edge to the lower end of the movable suction tube 34. (For example, a circular arc surface) is preferable.

  In addition, it is good to equip a screen etc. inside as needed so that the foreign material of the magnitude | size which a sand pump cannot process is not attracted | sucked.

  The jet nozzle 26 described above is provided with a plurality of suction port flanges 36 at equal intervals so as to break up the compacted sedimentation surface with jet water and further strengthen the water flow from the outer edge toward the lower end of the movable suction pipe 34. The injection direction should be set inward.

Linear actuator 38 is a Tandosora圧cylinder Recovery in Bas Ne 38a. One end of the single-acting pneumatic cylinder (the upper end in this figure) is attached to the hollow suction pipe 32, and the other end (the lower end in this figure) is attached to the suction port flange 36. When the pneumatic cylinder is extended and the suction port flange 36 attached to the movable suction pipe 32 is moved in the axial direction and the compressed air 3 is removed, the single-acting pneumatic cylinder is contracted by the spring 38a and returned. Yes.

  The bag transport apparatus of the present invention further includes a pressure detector 40 and a pressure control device 42.

  The pressure detector 40 is, for example, a piezo-type pressure sensor, is attached to the suction pipe 24 or the hollow suction pipe 32, detects the internal pressure thereof, and inputs it to the pressure control device 42 as an electrical signal.

  The pressure control device 42 is a control device installed on the carriage 9, and the compressed air 3 supplied to the linear motion actuator 38 so that the detected pressure falls within a pressure range suitable for sand discharge by the sand discharge pump 22. By controlling the pressure, the distance between the sediment suction port and the sediment surface is variably adjusted.

  Instead of the pressure detector, a discharge amount may be detected using a flow rate sensor, and this may be controlled.

  As described above, conventionally, as the suction port is closer to the lake bottom and the water flow is stronger, the amount of sand discharge increases. However, when the suction port comes into contact, the suction port is adsorbed on the sedimentation surface and cannot be sucked. Conversely, if the suction port is too far away from the bottom of the lake or the sedimentation surface is consolidated, only water is sucked in and sand cannot be discharged.

  In order to increase the sand mixing rate of water sucked from the suction port in order to increase the amount of sand discharge, it is necessary to suck in sand as much as possible with a minimum distance between the suction port and the sedimentation surface. Therefore, in the present invention, the suction port of the sand discharge pump is pressed against the sedimentation surface of the lake bottom to discharge the sand, but when it is adsorbed, the suction port is automatically lifted to prevent suction failure. Adsorption is detected by detecting the suction pressure, discharge amount, etc. of the sand pump with a sensor. In addition, the air cylinder adopts a spring return system and automatically returns to its original length when the rod advances after contracting.

  In addition, when the sedimentation surface is consolidated, it may not be sucked only by the flow of the sedimentation surface, so jet water is ejected from the nozzle and sucked.

  According to the present invention described above, the suction port flange 36 is suspended from the hollow suction pipe 32 communicating with the sand pump 22 via the suction pipe 24 via the linear motion actuator 38. When the suction sand removal device 20 is lowered, a strong water flow is generated between the flange surface of the suction port and the sedimentation surface of the lake bottom, and sand discharge is performed at a high sand mixing rate.

When the hollow suction pipe 32 is lowered too much and comes into close contact with the sedimentation surface, the pressure of the suction pipe 24 is rapidly reduced and the discharge amount is reduced. These are monitored by a sensor (pressure detector 40), and when the pressure falls below the set value, the air cylinder is contracted to lift the flange surface and return the flow .

  In addition, this invention is not limited to the Example and embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.

It is a 1st embodiment figure of a basket transportation device of the present invention. It is the elements on larger scale of FIG. 1 is a configuration diagram of a “mud collecting device” of Patent Document 1. FIG. 6 is a configuration diagram of “Amber method and apparatus” of Patent Document 2.

1 high pressure water, 2 sedimentation, 3 compressed air, 9 boats,
10 articulated arm device, 10a traveling mechanism (crawler etc.),
10b swivel base, 10c, 10d articulated arm,
16 Transport pipe,
18 High-pressure water supply device, 18a Flexible pipe 20 Suction sand discharge device,
22 Sand discharge pump (ejector pump),
22a injection port, 22b suction port, 22c discharge port,
24 suction pipe, 26 jet nozzle,
30 variable adjustable suction tubes, 32 hollow suction tubes,
34 movable suction pipe, 36 suction port flange,
38 linear actuator (single acting pneumatic cylinder), 38a spring,
40 pressure detector, 42 pressure control device

Claims (4)

In a dredge transport device that traps sedimented sediment and transports it to a treatment plant,
An articulated arm device having an articulated arm whose tip can be raised and lowered and mounted on a trolley;
A suction sand discharging device having a suction port for sedimentation and supported by the tip arm of the articulated arm;
And a flexible conveying pipe that connects the discharge port and the treatment plant of the suction Haisuna device, the suction Haisuna device includes a Haisuna pump, the horizontal distance between the inlet and sedimentation surface A variable adjustment suction pipe that variably adjusts, and a flexible suction pipe that connects between the variable adjustment suction pipe and the suction port of the sand discharge pump;
The variable adjustment suction tube is swingably attached to the tip of the tip arm and extends vertically, and is fitted to the lower portion of the hollow suction tube so as to be vertically slidable. A movable suction tube, and a linear motion actuator that can drive the movable suction tube up and down relative to the hollow suction tube, the linear motion actuator biasing the movable suction tube upward; A single-acting pneumatic cylinder that is in an activated state when supplied with compressed air and forcibly descends the movable suction pipe against the urging force of the spring;
The pressure detector for detecting the internal pressure of the suction pipe or the hollow suction pipe is connected to the pneumatic cylinder so that the pressure detected by the pressure detector is in a pressure range suitable for sand discharge by a sand discharge pump. A bag transport device, to which a pressure control device for controlling the supply of compressed air is connected . Wherein the lower end of the movable suction tube, characterized in that the suction port flange is attached extending radially dredging conveying equipment according to claim 1. Dredging conveying apparatus according to claim 1 or 2, characterized in that a jet nozzle for ejecting a jet water downward of the suction port attached to the suction port flange. The sand removal pump is an ejector pump,
The dredger conveyance device according to any one of claims 1 to 3, further comprising a high-pressure water supply device that supplies high-pressure water to be ejected to the ejector pump on a carriage.

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