JPH0327090Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a dredging device that slides on the sand layer surface of the water bottom and moves reciprocally to excavate the sand layer surface while sucking and discharging the excavated sand. be.

(Prior art) As shown in Fig. 5, this type of conventional dredging equipment has a ring pipe (B) attached to the tip of the sand removal suction pipe (A), and a pressure water pipe (C) connected to the ring pipe (B). , several stirring nozzles facing downward, and an eductor nozzle whose tip is bent like a fishhook and facing upward at the center of the suction port of the suction pipe to form the dredging pipe body.

Then, the dredging pipe body is lowered one after another, and the sand layer surface at the bottom of the water is stirred by water jet from the nozzle.
Work is carried out by sucking the sand into the suction pipe A by the suction action of the suction pipe A caused by the water jet from the nozzle hole.

(Problems to be solved by the invention) In the conventional dredging device described above, (1) the dredging pipe body is intermittently lowered, and when it descends, the sand near the suction port of the suction pipe A is immediately sucked in; After that, the action of only water being sucked is repeated, resulting in poor work efficiency.

(2) Since the dredging pipe body only descends and does not move laterally, (a) The dredging area at one location is narrow.

(b) The dredging location must be moved throughout the work.

Therefore, work efficiency does not improve.

(3) Since the eductor nozzle extends from the side to the center of the suction port of suction pipe A, debris such as plastic bags, tree roots, etc. scattered in the water will not be affected by the suction action of suction pipe A during work. As a result, it gets caught in the eductor nozzle hole, eventually making it impossible to work.

If this happens, you will have to stop the operation, pull up the dredging pipe body, and clean the suction pipe.
It is difficult to clean it.

There are problems with these points.

(Means for Solving the Problems) Therefore, in order to solve the above problems, this invention arranges pressure water pipes 2 and 3 in parallel on both sides of the suction pipe 1 for sand removal, and provides sand fins below. Connect the suction pipe 1 and both pressure water pipes 2 and 3 at appropriate intervals using several pipe bands 5 provided with (The downward direction is called the downward direction, and the opposite direction is called the upward direction.)
Eductor ring pipe 6 and stirring ring pipe 7 are located at the position.
The sand-breaking ring pipe 8 is installed concentrically above the eductor ring pipe 6, and the sand-breaking ring pipe 6, the stirring ring pipe 7, and the sand-breaking ring pipe 8 are connected as appropriate. Either the pressure water pipes 2 or 3 are connected, and the eductor ring pipe 6 is provided with several nozzles 9 facing diagonally upward and inward, and facing into the suction pipe 1, and the stirring ring pipe 7 is provided with several nozzles 9 facing downward. A dredging pipe body a is formed by disposing several nozzles 10 on the sand-sliding ring pipe 8 and several outward-facing nozzles 11 at appropriate intervals, and reciprocating the base of the dredging pipe body a. The dredging pipe body a is rotatably linked to the drive device using its base as a fulcrum to constitute a dredging device.

(Function) If the base of the dredging pipe body a is suspended from the hull A and the tip is placed on the sand layer B at the bottom of the water, and the base part is driven up and down with the dredging pipe body a in an inclined state, the dredging pipe body a
The nozzle 10 automatically reciprocates in the axial direction due to its own weight, excavates the surface of the sand layer B in an inclined manner with its fins 4, and sequentially rotates downward using the base as a fulcrum. The water jet from the nozzle mixes the sand and water near the suction port of the suction pipe 1, the water jet from the nozzle 11 promotes the collapse of the sand on both sides of the dredging pipe body a, and the water jet from the nozzle 9 and the suction pipe 1 Dredging work is performed by suctioning sand into the suction pipe 1 by the suction action of the dredging pump 12 connected to the base end of the dredging pump 12.

(Embodiment) To explain the structure of an embodiment of this invention shown in Figs. 1 to 4, A indicates the hull of a tilting automatic excavating dredger, and 13 and 14 are on one side of the hull A. Hanging pillars protruding outward from the front and back, 1
5 is a two-drum winch for the dredging pipe body a mounted on the front part of the hull A, and the rope 17 of the front drum 16
The base of the dredging pipe body a is suspended from the tip of the front hanging column 13 by the rope 19 of the rear drum 18, and the tip of the dredging tube body a is suspended from the tip of the rear hanging column 14. The front drum 16 is electrically rotated automatically forward and backward at regular intervals, and the base of the dredging pipe body a is driven up and down and back and forth via the cable 17.

a indicates a dredging pipe body, the tip of the pressure water pipe 2 is connected to the eductor ring pipe 6, the tip of the pressure water pipe 3 is connected to the stirring ring pipe 7, and the pressure water pipe 3 and the sand-sliding ring pipe 8 are connected. Although not shown, the eductor ring pipe 6 has three nozzles 9 that face diagonally upward and inward into the suction pipe 1.
The stirring ring pipe 7 is provided with five nozzles 10 directed downward and slightly diagonally inward, and the sand-breaking ring pipe 8 is provided with four nozzles 11 directed diagonally downward and outward. Reference numeral 20 denotes a reinforcing pipe that is fitted into the suction port of the suction pipe 1 and also serves as suction restriction.

21 is a high-pressure water pump mounted on the hull A, and the base end of the suction pipe 1, the suction port of the dredging pump 12, the base ends of the pressure water pipes 2 and 3, and the high-pressure water pump 21 are connected to a connecting hose 22 of an appropriate length, respectively. 23. Reference numeral 24 denotes a sand discharge pipe whose base end is connected to the discharge port of the dredging pump 12, and whose tip faces the ground. 2
5 and 26 are mooring cables at the front and rear of the hull A.

Next, its effect will be explained. The dredging pipe body a is suspended and stored by the cables 17 and 19 as shown in the upper part of Fig. 1 by the cables 17 and 19, and the hull A is propelled to the required location and the front and rear cables 25 are attached as shown in Fig. 1. , 26.

Next, when the rear drum 18 of the winch 15 is operated to loosen the cables 19, the dredging pipe body a rotates and descends due to its own weight using the hanging part formed by the cables 17 at the base as a fulcrum, as shown in FIG. As shown by the solid line, the tip rests on the sand layer B and is tilted backward and downward.

On the other hand, when the pumps 12 and 21 start operating,
High-pressure water passes through the hose 23 and the pressure water pipes 2 and 3 and is injected from nozzles 9, 10, and 11, respectively, and water is injected from the nozzle 9 and the pump 1
Due to the suction action of 2, a suction force is generated at the suction port of the suction pipe 1.

Therefore, if the automatic forward and reverse rotation device of the front drum 16 of the winch 15 is energized, the base of the dredging pipe body a will automatically reciprocate up and down via the cable 17.
Along with this, the dredging pipe body a reciprocates in the axial direction due to its own weight, and while excavating the surface of the sand layer B in an inclined manner with the fins 4, it sequentially rotates downward using the base as a fulcrum. At the same time, water is jetted from the nozzle 10 to mix the sand and water near the suction port of the suction pipe 1.
The water jet from the nozzle 11 promotes the collapse of the sand on both sides of the dredging pipe body a, and the water jet from the nozzle 9 and the suction action of the pump 12 move the sand into the suction pipe 1.
The sand is sucked into the suction pipe 1 through the suction port, passes through the suction pipe 1, the hose 22, the pump 12, and the sand discharge pipe 24, and is discharged to the ground from the tip of the sand discharge pipe 24.

When the dredging pipe body a reaches the vertical state, the winch 15 is operated to move the dredging pipe body a to the cables 17 and 19.
Accordingly, as shown by the chain line at the top of FIG. 1, the vessel A is hoisted and stored, and the hull A is moved appropriately. Then, by performing the same operations as above, the dredging work can be performed again at the moved location by acting in the same manner as above, and thereafter the above-mentioned operations are repeated one after another to perform the dredging work continuously.

(Effects of the invention) The dredging device of this invention has the following remarkable effects.

(1) As the dredging pipe reciprocates in the direction of its axis, the sand fins of the dredging pipe scratch and excavate the surface of the sand layer on the water bottom, while the water from the nozzle of the stirring ring pipe excavates. The sand and water near the inlet of the suction pipe are mixed by spraying, water is sprayed from the nozzle of the sand-breaking ring pipe to promote the collapse of sand on both sides of the dredging pipe body, and water is sprayed from the nozzle of the eductor ring pipe. Since the sand is sucked and discharged by the suction action of the dredging pump, the sand in the sand layer where the dredging pipe body is located is smoothly and well broken down, and the excavated sand is constantly supplied to the suction port of the suction pipe in a state that is easy to suck. It is efficient and improves work efficiency.

(2) Since the tip of the suction pipe protrudes beyond the nozzle of the stirring ring pipe, damage to the nozzle can be prevented.

(3) A ring pipe for the eductor is provided, and sand, etc., is blown into the water suction pipe by water jets from several nozzles directed diagonally upward and inward, so the nozzles do not get in the way and remove debris scattered in the water. Objects, tree roots, etc. can be sucked into the suction tube smoothly.

(4) The dredging pipe body makes a reciprocating motion and rotates downward by its own weight using its base as a fulcrum. Therefore, (a) There will be no strain on the dredging pipe.

(b) The operation of the dredging pipe body is light and smooth.

(c) Work is carried out continuously until the dredging pipe starts from an inclined state and reaches a vertical state, and the work area for each section is wide and takes a long time. All you have to do is check the status, no operation is required, and even when working for long periods of time, the operator is less fatigued, saving time and effort.

(5) Sand fins were installed on the pipe band that connects the suction pipe and the pressure water pipes on both sides at appropriate intervals.
The pipe band is reinforced by the sand fins and becomes strong, and the connecting portion between the suction pipe and the pressure water pipe becomes strong, making it possible to construct a strong dredging pipe body.

(6) The structure is simple and can be manufactured easily and inexpensively, and its operation is smooth and accurate.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tilting automatic excavation type dredger according to an embodiment of this invention, and FIG. 2 is an enlarged rear view of the tip of the dredging pipe body, partially cut away. FIG. 3 is a side view of the same as above, FIG. 4 is a sectional view taken along the line -- in FIG. 2, and FIG. 5 is a rear view of the tip of a conventional dredging pipe body, partially cut away. 1... Suction pipe for sand removal, 2, 3... Pressure water pipe, 4
... Sand fin, 5 ... Pipe band, 6 ... Ring pipe for eductor, 7 ... Stirring ring pipe, 8 ...
Ring pipe for sand-sliding, 9, 10, 11... nozzle.

Claims (1)

[Scope of utility model registration request] Pressure water pipes are arranged in parallel on both sides of the suction pipe for sand removal, and the suction pipe and both pressure water pipes are connected at appropriate intervals by several pipe bands with sand fins provided at the bottom, and the tip of the suction pipe is An eductor ring pipe and a stirring ring pipe are placed one above the other at a position slightly above the inlet of the eductor, and a sand-breaking ring pipe is installed concentrically above the eductor ring pipe. Appropriately connect either of the above-mentioned pressure water pipes to the eductor ring pipe and the sand-sliding ring pipe, and the eductor ring pipe has several nozzles facing diagonally upward inward and facing into the suction pipe. A dredging pipe body is formed by arranging several nozzles directed downward in the ring pipe for sand-sliding, and several nozzles directed outward in the ring pipe for sand-sliding at appropriate intervals. A dredging device in which a dredging pipe body is rotatably connected to a reciprocating drive device using the base portion as a fulcrum.