JP3124195B2 - Foreign matter removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing foreign matter (such as shellfish) adhered to the inner surface of a seawater intake pipe for cooling in various power plants, and a cleaning apparatus for removing foreign matter.

[0002]

2. Description of the Related Art FIG. 3 shows the removal of marine organisms such as shells attached to the inner surface of a cooling seawater intake pipe in various power plants.
It is explanatory drawing of the conventional underwater shell removal apparatus used for cleaning etc. In the figure, the underwater shellfish removal apparatus is intended for removal and cleaning of marine organisms on a flat surface or a surface having a large curvature, and removal of marine organisms on a saddle-shaped inner surface such as a circular pipe. Cleaning is not covered. In the figure, reference numeral 1 denotes a target surface from which foreign matter is to be removed, 2 denotes a marine organism to be removed, 21 denotes a cutter, 22 denotes a spring-like portion having spring elasticity like a steel wire rope.
The tip of the cutter 21 rotates while following the target surface 1 by the action of (1). 23 is a flange, 24 is a drive shaft, and 25 is an actuator.

[0003]

In the conventional underwater shell removal apparatus as described above, the cutter 21 may come into contact with the target surface 1 in the pipe and damage the coating of the target surface 1. Therefore, if an attempt is made to provide a gap so as not to contact the target surface 1, it is necessary to secure a constant gap with respect to the target surface 1 having a saddle-shaped unevenness in the axial direction and the circumferential direction on the inner surface of the circular tube. Difficult, resulting in uneven shell removal.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an underwater shell removal apparatus according to the present invention, which is mounted so as to be capable of moving forward and backward with respect to a surface from which foreign matter is to be removed, and is oriented substantially perpendicular to the surface. A cutter that rotates about a drive shaft and removes foreign matter on the target surface; and a cutter that engages with the cutter and moves the cutter toward and away from the target surface in accordance with irregularities on the target surface. A cam plate for maintaining a predetermined gap with the target surface.

[0005]

That is, in the foreign matter removing apparatus according to the present invention,
A cam plate is provided so as to be capable of moving forward and backward with respect to the target surface for foreign matter removal, and is engaged with a cutter for removing foreign matter on the target surface by rotating about a drive shaft oriented substantially perpendicular to the target surface. The cutter moves forward and backward with respect to the target surface according to the unevenness, and a predetermined gap is maintained between the cutter and the target surface, and the gap between the cutter and the target surface is always kept constant by the cam plate Then, the cutter can be rotated without contacting the target surface while always maintaining a predetermined gap with respect to the target surface.

[0006]

1 and 2 are explanatory views of an underwater shell removal apparatus according to one embodiment of the present invention. In the drawing, the underwater shellfish removal apparatus according to the present embodiment is used for removing and cleaning marine organisms such as shellfish attached to the inner surface of the cooling seawater intake pipe in various power generation plants, and reference numeral 1 in the figure is The target surface for removing marine organisms such as the inner surface of a circular tube, 2 is a marine organism such as a shellfish to be removed, 3 is a cutter for removing the marine organism 2, and a cylinder is cut diagonally as shown in the figure. The marine creature 2 is removed by the tip having the shape as described above. The cutter 3 is fixed to the tip of the holder 4. The holder 4 is rotatably supported at its central portion by a shaft 6 with respect to a mounting plate 5. A torsion coil spring 7 around the shaft 6
Is mounted, and the cutter 3 is constantly biased toward the target surface 1 side. A cam follower 8 is rotatably fixed to the base end of the holder 4. The mounting plate 5 is a rotating flange 9
It is fixed to. The rotating flange 9 is fixed to a drive shaft 10 and is rotatably supported by a case 12 by a bearing unit 11. The drive shaft 10 includes a reduction gear unit 13,
It is connected to a drive motor 15 via a coupling 14. A seal unit 16 is provided at the distal end of the case 12, and has a structure for preventing intrusion of seawater or the like. A cam plate 17 is mounted outside the seal unit 16. The lower surface of the cam plate 17 that is in contact with the cam follower 8 has the same saddle shape as the target surface 1 so that the cutter 3 always rotates with a constant gap with respect to the target surface 1. In addition, four cutters 3 are attached to the rotating flange 9, but if one or more cutters 3 are provided, the features of the present invention are not impaired.

As shown in FIG. 1, the underwater shell removal apparatus of this embodiment has an underwater moving device 19 having a shell removal device mounting surface 18 capable of holding a substantially constant distance using the target surface 1 as a guide. It is mounted and used so that it faces vertically
One or two or more of the present underwater shell removal devices are mounted on one underwater moving device 19. When the drive motor 15 is driven by a control device (not shown), the drive shaft 10 and the rotary flange 9 rotate via the speed reducer unit 13, and the holder 4 and the cutter 3 rotatably supported by the mounting plate 5 also rotate. . The cam plate 17 is fixed, and the cutter 3 urged in the direction approaching the target surface 1 by the torsion coil spring 7 has a cam follower 8 whose cam follower 8 has the target surface 1 of the cam plate 17.
It is possible to advance and retreat by rotating following the lower surface having the same shape as that of the saddle type, and to rotate while always maintaining a constant gap with the target surface 1. Even if the diameter of the target pipe changes, simply replace the cam plate 17 with one that matches the saddle shape of the target surface 1 and simply apply it to the inner and outer surfaces of various pipes with different pipe diameters. Can be.

In the conventional underwater shell removal apparatus, there is a possibility that the cutter contacts the target surface in the pipe and damages the coating on the target surface. For this reason, if an attempt is made to provide a gap so as not to contact the target surface, it is difficult to secure a constant gap with respect to the target surface having saddle-shaped irregularities in the axial direction and the circumferential direction on the inner surface of the circular tube. In order to solve such problems, the cutter 3 for removing marine organisms 2 with attached shells and the like keeps a constant gap from the target surface 1 in order to solve such problems. Cam plate 17 formed identically to the saddle-shaped target surface 1 so as to rotate
A mechanism is provided to move the cutter 3 back and forth following the lower surface,
By rotating the cutter 3 so as to follow the lower surface of the saddle-shaped cam plate 17 formed in the same manner as the target surface 1, the gap between the cutter 3 and the target surface 1 can always be kept constant. Since the cutter 3 does not come into contact with the object 1, the coating of the target surface 1 is not damaged. Therefore, there is no need to repair the target surface 1 after the removal, and the operation cost can be reduced and the operation can be performed in a short time. Further, since the distance between the cutter 3 and the target surface 1 is always kept constant, unevenness in removal does not occur, and the work efficiency can be improved.

[0009]

The foreign matter removing apparatus according to the present invention is configured as described above, and the cutter can be rotated while always maintaining a predetermined gap with respect to the target surface. There is no damage to the coating and no uneven removal.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an underwater shell removal apparatus according to one embodiment of the present invention.

FIG. 2A is a sectional view taken along the line AA in FIG. 1;
FIG. 2B is a view taken in the direction of arrow B in FIG.
FIG. 4 is a sectional view taken along the line CC in FIG.

FIG. 3 is a front view of a conventional underwater shell removal apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Target surface 2 Marine organism 3 Cutter 4 Holder 5 Mounting plate 6 Shaft 7 Torsion coil spring 8 Cam follower 9 Rotating flange 10 Drive shaft 11 Bearing unit 12 Case 13 Reduction gear unit 14 Coupling 15 Drive motor 16 Seal unit 17 Cam plate 18 Mounting surface of underwater shellfish device 19 Underwater moving device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B08B 1/04 E02B 1/00 301 E02B 9/04

Claims (1)

(57) [Claims] 1. A cutter which is mounted so as to be capable of moving forward and backward with respect to a target surface for foreign matter removal and rotates about a drive shaft oriented substantially perpendicular to the target surface to remove foreign matter on the target surface, and a cutter related to the cutter. A cam plate that is provided in combination and moves the cutter forward and backward with respect to the target surface in accordance with the unevenness of the target surface to maintain a predetermined gap between the cutter and the target surface. Foreign matter removing device.