JP6185852B2 - Pollution prevention dredge device - Google Patents

Description

  In the present invention, when the grab bucket is lifted after dredging and swirled to discharge internal sludge, the sludge attached to the outer surface of the grab bucket falls to a place not surrounded by the pollution control film. The present invention relates to a pollution prevention dredge device for preventing the pollution from spreading.

  In dredging work, the grab bucket is thrown into the water from the top of the trolley, the bottom of the water is dredged, and the sludge is lifted to the surface of the water and collected on the trolley. At that time, in order to prevent the diffusion of sludge and the like accompanying dredging, dredging work is carried out in a pollution prevention film (hereinafter also referred to as a grab frame or pollution prevention frame) suspended from a floating body surrounded by a square shape. Often.

  In such a case, the sludge adhering to the outer surface of the grab bucket when performing the work of pulling up the grab bucket that has dripped sludge etc. onto the water and turning it toward the trolley etc. to discharge the sludge However, there is a problem that the pollution is diffused by falling to a place not surrounded by the pollution prevention film, and the pollution prevention effect is remarkably impaired even though it is surrounded by the pollution prevention film.

  For the problem that the sludge adhering to the outer surface of the grab bucket falls to a place that is not surrounded by the pollution prevention film and the pollution spreads, it is inserted between the earth ship and the pollution prevention frame. A direction in which the floating ship-side floating body disposed on the side of the soil-transporting ship, the anti-contamination frame-side floating body disposed on the side of the anti-pollution frame, and the floating ship-side floating body and the anti-contamination frame-side floating body are always separated from each other. The urging means for urging to the floating ship side floating body, and the other end is suspended in the pollution prevention frame after passing over the pollution prevention side floating body and the pollution prevention frame. There is a pollution prevention device for dredging work characterized by comprising a pollution prevention sheet that covers the gap between the earth ship and the pollution prevention frame (for example, see Patent Document 1).

  This pollution control device is intended to receive sludge that has fallen from the outer surface of the grab bucket by means of a pollution prevention sheet that covers the gap between the ship and the pollution prevention frame. On the affected water, it is characterized by a biasing means such as a spring for urging the pollution prevention sheet between the earth ship and the pollution prevention frame. It is shown that the sludge accumulated on the sheet slides down the sludge etc. into the pollution prevention frame by maintaining the state where the pollution prevention sheet is inclined downward toward the pollution prevention frame (Patent Document 1). (Paragraph number 0024), it is difficult to maintain a flexible anti-pollution sheet in a state of being tilted at a constant level on water affected by waves and winds, so that a large amount of sludge accumulates on the anti-pollution sheet. etc There is a case in which the discharge process or the like is additionally required.

  As an apparatus that can easily discharge sludge and the like that has fallen from the outer surface of the grab bucket, the first inclined surface body that is installed on the shore side of the clay ship and has an inclined surface that is inclined toward the hold side and the outside of the ship. A second inclined surface body having an inclined surface inclined, and a third inclined surface body having an inclined surface inclined to the inner side of the frame installed on the outer frame of the grab frame (contamination prevention film suspended from the float part) The lower end portion of the inclined surface of the second inclined surface body is located vertically above the upper end portion of the inclined surface of the third inclined surface body, and the lower end portion of the inclined surface of the second inclined surface body and the inclined surface of the third inclined surface body There is a dredged sand sand surface fall prevention device characterized by having a region where the upper end of the surface overlaps in the vertical direction (see, for example, Patent Document 2).

  This dredged soil sand surface fall prevention device is used to prevent dredged soil (sludge) that has fallen from the grab bucket between the grab frame and the ship to drop on the water surface. A plate (first sloped face) inclined obliquely downward toward the hold side, and a slant downward from the anchor ship side toward the grab frame, and floats on the anchor ship side and grab frame Two types of plates (second inclined surface body and third inclined surface body) installed so that a part of each other overlaps each other (floating body), and dredged sand (sludge) on either of these plates ) Etc. fall, dredged soil (sludge) etc. will slide into either the hold of the ship or the grab frame, and it will fall due to dredged soil (sludge) etc. that has fallen from the grab bucket Pollution can be prevented.

  However, in this water surface fall prevention device, since the float part (floating body) of the earth ship and the grab frame floats in a state of floating in the water due to waves and wind, the second inclined surface body provided on the earth ship and Since a sufficiently large plate is required so that there is no gap between the float and the third inclined surface body, it is easy to use very large equipment. It is difficult to use in places that are susceptible to wind.

JP 2012-127161 A JP2013-44208A

  In view of the above-mentioned problems, the present invention is designed so that the grab bucket is lifted and swung to discharge sludge and the like on the outer surface of the grab bucket after the water bottom in the frame surrounded by the antifouling film is dredged. It is an object of the present invention to provide a pollution prevention dredging device for preventing adhered sludge from falling to a place not surrounded by a pollution prevention film and spreading the pollution.

  As a result of intensive studies to solve the above problems, the inventors of the present invention are composed of a floating body arranged in a square shape with sides of 15 to 25 m, and a pollution control film suspended from the floating body. In a pollution prevention dredge apparatus that performs dredging work by inserting a grab bucket into the membrane, a tube body is provided over the entire circumference of the floating body and nozzles are attached to the inside of the floating body at equal intervals. And a submersible pump that sucks the water sprayed from the nozzle toward the grab bucket pulled up above the water surface and sucks the water outside the anti-pollution membrane and supplies it to the pipe body. Since it is not a device straddling a floating body, it is not easily affected by waves and winds, and it can be made a simple structure with only a nozzle, pipe, and submersible pump placed on the floating body. From small to small Can handle various sizes, and does not cause sludge to fall naturally, but by removing the sludge on the outer surface of the grab bucket with water sprayed from the nozzle, ensuring the diffusion of pollution The present invention was completed by investigating that it can be prevented.

  That is, the present invention comprises a floating body arranged in a square shape with sides of 15 m to 25 m, and a pollution prevention film suspended from the floating body, and performs a dredging operation by inserting a grab bucket into the pollution prevention film. In the pollution prevention dredging device, a tubular body that is provided over the entire circumference of the floating body and has nozzles attached to the inside of the floating body at equal intervals, and a grab bucket that is pulled up above the water surface. And a submersible pump for sucking water outside the anti-contamination membrane and supplying it to the pipe body.

  In addition, if a pollution scattering prevention sheet is further provided on the entire circumference of the floating body and outside the pipe body, the water sprayed toward the outer surface of the grab bucket will splash and sludge will float. This is preferable because it does not scatter to the outside of the body and can more reliably prevent contamination.

  The pollution prevention dredge device according to the present invention comprises a floating body arranged in a square shape with a side of 15 to 25 m and a pollution prevention film suspended from the floating body, and a grab bucket is put into the pollution prevention film. In the pollution prevention dredging apparatus that performs dredging work, a tube body that is provided over the entire circumference of the floating body and nozzles are attached to the inside of the floating body at equal intervals, and on the water surface. Because it has a submersible pump that sucks the water sprayed from the nozzle toward the raised grab bucket and sucks the water outside the pollution prevention film and supplies it to the pipe body, it is not a device straddling the base boat and the floating body, It is not easily affected by waves and winds, and it can be constructed simply by placing a nozzle, pipe, or submersible pump on a floating body, so it can be used for a wide range from relatively large to small ones. Can accommodate the size And instead of being naturally fall sludge, by the water jetted from the nozzle by removing forcing sludge of the outer surface of the grab bucket, it is the diffusion of the pollutant can be reliably prevented.

  Further, in the aspect in which the pollution scattering prevention sheet is further erected on the entire periphery above the floating body and outside the pipe body, the water sprayed toward the outer surface of the grab bucket splashes and sludge etc. This is preferable because it does not scatter to the outside of the floating body and can more reliably prevent contamination.

It is an isometric view explanatory drawing which shows one Example of the pollution prevention dredge apparatus which concerns on this invention. FIG. 2 is a perspective explanatory view showing a state where water is injected into a grab bucket in the pollution prevention dredge device according to the present invention of FIG. 1. It is perspective explanatory drawing which shows the other Example of the pollution prevention dredge apparatus which concerns on this invention.

  Hereinafter, the pollution control dredge apparatus according to the present invention will be described in detail with reference to the drawings.

  X is a grab bucket, and a special mechanism or the like is not particularly required. However, it is preferable to have a structure in which the collected sludge and the like of the bottom of the water does not leak when it is pulled up to the surface after dredging.

  Reference numeral 1 denotes a floating body arranged in a square shape having a side of 15 m to 25 m. The floating body 1 may be one floating body 1 for each side (FIGS. 1 and 2), but may be a plurality of floating bodies 1 for each side. The floating bodies 1 to be formed may be arranged at intervals (FIG. 3), or may be used without being spaced so as to be integrated as a whole. When a plurality of floating bodies 1 are used for each side, a rectangular shape can be easily maintained if the plurality of floating bodies 1 are connected with steel as shown in FIG. Etc. are preferable because they are easy to fix.

  It should be noted that the length of one side of the floating body 1 is set to 15 m to 25 m because the length of one side is less than 15 m is too narrow, and when the grab bucket X is moved during dredging, the floating body 1 and the grab are often This is because the floating body 1 is damaged due to contact with the bucket X, or the working area that can be dredged is narrow, so that the floating body 1 must be moved frequently, resulting in a problem that work efficiency is lowered. This is because when the length of one side of the floating body 1 exceeds 25 m, it is too wide and it is difficult to reliably apply water sprayed from a nozzle 3 described later on the floating body 1 to the outer surface of the grab bucket X.

  Reference numeral 2 denotes a pollution prevention film that surrounds a region dripping from the floating body 1. The grab bucket X is inserted into the pollution prevention film 2 so that dredging work is performed so that external water is not polluted by sludge or the like. It is for making. Further, a weight is attached to the lower end of the pollution prevention film 2 so as to hang down from the floating body 1.

  Reference numeral 3 denotes a nozzle, and reference numeral 4 denotes a tubular body that is provided over the entire upper periphery of the floating body 1 and to which the nozzle 3 is attached toward the inside of the floating body 1 at equal intervals. A submersible pump 5 sucks water from the nozzle 3 toward the grab bucket X pulled up on the water surface and sucks the water outside the antifouling film 2 and supplies it to the tube 4.

  In addition, by arrange | positioning the nozzle 3 at equal intervals, water can be injected in a grid | lattice form, As a result, it can wash off the sludge of the outer surface reliably wherever the grab bucket X exists in the floating body 1. It can be done.

  Reference numeral 6 denotes an anti-fouling scattering sheet that is erected on the outer periphery of the tubular body 4 over the entire circumference of the floating body 1. It is intended to prevent the water sprayed toward the outer surface of the grab bucket X from splashing and splashing sludge and the like to the outside of the floating body 1, and preferably has a height of about several meters. Available.

  In order to actually use the pollution prevention dredging apparatus according to the present invention, the size of one side of the pollution prevention dredging apparatus according to the present invention, that is, the floating body 1 is determined in consideration of the size of the planned dredging area.

  When the length of one side of the floating body 1 is short and the inside of the floating body 1 is narrow as a whole, water sprayed from the nozzle 3 can be reliably applied at a short distance, but if the length of one side is less than 15 m, When the grab bucket X is moved during the dredging operation because it is too narrow, the floating body 1 and the grab bucket X often come into contact with each other, and the floating body 1 is damaged, or the working area that can be dredged is narrow, so the floating body is frequently Since 1 has to be moved and the problem that working efficiency falls arises, the length of one side of the floating body 1 needs to be 15 m or more.

  On the other hand, if the length of one side of the floating body 1 exceeds 25 m, it is too wide, so it is difficult to reliably apply water sprayed from the nozzle 3 described later on the floating body 1 to the outer surface of the grab bucket X. The length of one side of the floating body 1 needs to be 25 m or less.

  In such a range, the length of one side of the floating body 1 is determined, and the pollution prevention dredge device according to the present invention is constructed to fix the position.

  Then, the grab bucket X is thrown into the floating body 1 (contamination prevention film 2) in order, and is then hesitated.

  For example, the grab bucket X is thrown into the corner of the floating body 1, and the bottom of the water is dredged to raise sludge and the like on the bottom of the water. At that time, the outer surface of the grab bucket X is lifted up onto the water surface with sludge and the like adhering to it. When turning to discharge sludge etc. inside the grab bucket X, sludge adhering to the outer surface of the grab bucket X falls to a place not surrounded by the pollution prevention film 2 and the pollution diffuses. In order to prevent the sludge and the like from falling naturally, the water sprayed from the nozzle 3 forcibly removes the sludge and the like on the outer surface of the grab bucket X inside the floating body 1 to ensure the diffusion of the pollution. It prevents it.

  The water jetted from the nozzle 3 is sucked up by the submersible pump 5 from the outside of the pollution prevention film 2 with little dirt, supplied to the pipe body 4, and further jetted from the pipe body 4 through the nozzle 3, whereby the grab bucket X The sludge etc. adhering to the outer surface of the water is washed away. At that time, since the polluted water containing sludge and the like falls to the inside of the pollution prevention film 2, no special drainage and purification mechanism or the like is necessary.

  Further, in the floating body 1 (pollution prevention film 2), although not shown, when the grab bucket X is thrown into the corner portion or when the grab bucket X is thrown into the center portion, the direction of each nozzle 3 respectively. If you try to adjust the strength of the sprayed water, it will not be possible to perform dredging work that is troublesome and efficient.

  Therefore, if water is always jetted from each nozzle 3 in a grid pattern and water is jetted at a constant intensity all at once, the outer surface of the grab bucket X can be used regardless of the position at which the grab bucket X is introduced. The sludge and the like can be easily and quickly washed off.

DESCRIPTION OF SYMBOLS 1 Floating body 2 Pollution prevention film 3 Nozzle 4 Pipe body 5 Submersible pump 6 Pollution scattering prevention sheet X Grab bucket

Claims (2)

It consists of a floating body (1) arranged in a square shape with a side of 15m to 25m, and a pollution prevention film (2) suspended from the floating body (1). In the pollution prevention dredging device that performs dredging work by putting in the bucket (X),
A tubular body (4) provided over the entire circumference of the floating body (1) and having nozzles (3) attached to the inside of the floating body (1) at equal intervals;
Then, the water sprayed from the nozzle (3) toward the grab bucket (X) pulled up on the surface of the water is sucked out of the anti-contamination membrane (2) and supplied to the tube (4). And a submersible pump (5) for preventing pollution.   The pollution prevention dredge device according to claim 1, wherein a pollution scattering prevention sheet (6) is further erected on the entire upper periphery of the floating body (1) and outside the pipe body (4).

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