JPS6366565B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an underwater traveling sand removal device for removing sand and mud accumulated in a water intake tank, a settling basin, and the like.

BACKGROUND OF THE INVENTION Nuclear and thermal power plants are typically built along coastlines and rely on seawater for the cold water needed by their facilities. This cooling water is made from supernatant seawater that has been settled in a water tank that collects sand and mud. For this reason, coarse materials such as sand, mud, shellfish, and inflowing sunken wood accumulate in the intake tank. In particular, large amounts of sand and the like are likely to accumulate after the sea becomes rough, such as when a typhoon passes. Therefore, it is necessary to remove the sand etc. accumulated in the water intake tank as appropriate.

The work of removing sand and the like accumulated in the water intake tank has conventionally been carried out by the method shown in FIGS. 5 to 7. That is, in the method shown in FIG. 5, the submersible sand removal pump 1 is suspended from the hook at the end of the crane arm 3 of the crane truck 2, and the crane arm 3 is extended and contracted and moved laterally to open the water intake tank 4.
Sand etc. 5 deposited on the bottom of the tank are sucked and discharged by a submersible sand removal pump 1. In the method shown in FIG. 6, a bucket 6 is suspended from a hook at the tip of the crane arm 3, and the bucket 6 is opened at the bottom of the water intake tank 4 to pick up sand, etc. 5. moreover,
The method shown in FIG.
A crane 7 is installed, the submersible sand removal pump 1 is suspended from the girder crane 7, and the submersible sand removal pump 1 is moved by the movement of the girder crane 7, and the sand, etc. 5 at the bottom of the water intake tank 4 is submergedly drained. The sand pump 1 sucks and discharges the sand.

(Problems to be solved by the invention) By the way, in the method shown in FIG. 5 above,
In order to suspend the submersible sand removal pump 1 from the bottom of the intake tank 4 at any location, the crane arm 3 is extended and contracted and moved laterally, but the range in which the submersible sand removal pump 1 can be moved is limited to the extension of the crane arm 3. The work is complicated, as the length is limited and the crane truck 2 itself needs to be moved, and furthermore, in the case of a large area of the water intake tank 4, it may not be possible to remove sand from the central part. Further, when working while water is being taken from the water intake tank 4, there is a problem in that the submersible sand removal pump 1 tends to swing and become unstable due to the flow velocity in the tank.

In addition, in the method shown in FIG.
In addition to the problems of the method shown in the figure, when the bucket 6 is suspended and seated on the bottom of the tank, impact force is applied to the bottom of the tank, which tends to cause wave damage. Further, there are problems in that the sand etc. 5 picked up by the bucket 6 tends to leak, and when the sand etc. 5 is picked up, it tends to come up without any sand etc., which tends to pollute the water quality.

Furthermore, in the method shown in FIG. 7, as the width of the water intake tank 4 increases, the equipment cost of the girder crane 7 becomes expensive, and a girder crane 7 must be provided for each water intake tank 4. Multiple water intake tanks 4
There is a problem in power generation equipment etc. equipped with this that the equipment cost is extremely high.

An object of the present invention is to solve the above-mentioned problems of the conventional work of discharging the sand accumulated in the water intake tank. To provide an underwater traveling sand evacuation device that can thoroughly eject sand from the bottom of a tank.

(Means for Solving the Problems) In order to achieve the above object, the underwater traveling sand removal device of the present invention scoops up coarse materials by vertical movement to the front part of a tracked vehicle that can self-propel underwater. A rake device for collecting materials is installed in the storage box, and a screw conveying device is installed at the rear that collects the deposits from the left and right to the center by rotating screw-like fins, and is movable up and down. A cylindrical body connected to the suction port of the submersible sand removal pump is opened in the center of the screw cover that covers the upper part of the fin, and the discharge port of the submersible sand removal pump is led out of the water with a drainage hose, and the endless track is connected to the suction port of the submersible sand removal pump. A control cable and a power cable are provided between a control unit mounted on the vehicle and a control panel arranged on the ground, and a plurality of floats are arranged on these control cables, power cables, and the drainage hose to create a surplus. It is constructed so that parts of it float on the water surface.

(Function) A rake device installed at the front of a tracked vehicle that can self-propel underwater scoops up bulky items and collects them in a bulky item storage box. In addition, the screw transport device installed at the rear gathers sediment such as sand in the center of the screw cover by rotating the fins without blowing it up into the water, and then sucks it in with the submersible sand pump and drains it through the drainage hose. Discharge to the ground. Then, the excess parts of the control cables and power cables installed between the drainage hose and the control unit mounted on the tracked vehicle and the control panel installed on the ground are floated on the water surface, making it infinite There is no possibility of damage caused by running over the railcar while it is running.

(Explanation of Examples) Below, Figures 1 to 4 will be explained for Examples of the present invention.
This will be explained with reference to the figures. FIG. 1 is a plan view of an embodiment of the underwater traveling sand discharging device of the present invention, and FIG. 2 is a side view of the underwater traveling sand discharging device of FIG.
FIG. 3 is a diagram illustrating the use of the underwater traveling sand discharge device of the present invention, and FIG. 4 is a diagram illustrating the collection of sand and the like by the screw transport device and the suction by the submersible sand discharge pump.

In FIGS. 1 to 4, the underwater traveling sand removal device 10 includes a rake device 12 disposed at the front of a tracked vehicle 11 equipped with a track pillar made of rubber or the like, and a screw conveyor device 13 disposed at the rear. Furthermore, on the tracked vehicle 11, a hydraulic unit 14, an underwater sand removal pump drive machine 15, an underwater sand removal pump 16, a control unit 17, 17, a bulky storage box 18, an underwater television camera 19, 19, an underwater flashing light 20, 2
0, underwater revolving lights 21, 21 and floating float storage capsules 22, 22 are mounted. The rake device 12 includes a rake 32 that is swingably disposed at the tip of a rake arm 31 that can swing up and down, and the rake arm 31 is connected to a rake arm hydraulic cylinder 33.
The rake 32 is swung vertically by the rake arm 31, and the rake 32 is swung by the rake hydraulic cylinder 34. and,
The coarse material scooped up by the rake device 12 is transferred to the rake 32.
A bulky item storage box 18 is provided at a position where the box 18 falls when the box is swung. Further, in the screw conveyor 13, a horizontal rotating shaft 41 perpendicular to the advancing direction of the tracked vehicle 11 is rotationally driven by a hydraulic motor 42, and a screw-shaped fin whose helical direction is reversed on both left and right sides of the rotating shaft 41 is rotatably driven by a hydraulic motor 42. 43 is fixed, and the upper part of the screw-shaped fin 43 is covered and integrated with a screw cover 44 in a slightly eccentric manner. And a screw cover 44 in the center where the spiral direction of the screw-like fins 43 is reversed.
One end of the cylindrical body 45 is opened. Further, the rotary shaft 41, the screw-shaped fins 43, and the screw cover 44 are integrally movable up and down by the arms 46, 46, and can be operated up and down by the screw conveying hydraulic cylinders 47, 47. The other end of the cylindrical body 45 is connected to the suction port of the submersible sand removal pump 16 via a flexible hose 48 . A discharge port of the submersible sand discharge pump 16 is led out of the water intake tank 4 by a drainage hose 50.
Further, a power cable 52, a control cable 53, and a pneumatic hose 54 are provided between the control unit 17 and a control panel 51 disposed on the ground. Based on the control command, the control unit 17 controls the hydraulic unit 14, the tracked vehicle 11, and the rake device 12.
The screw transport device 13 is moved up and down, and the submersible sand removal pump 16 is driven. Furthermore, a drainage hose 50, a power cable 5
2. A plurality of floats 55, 55, . . . are arranged on the control cable 53 and the pneumatic hose 54, and the remaining portions are kept floating on the water surface. Note that a folded rubber levitation float (not shown) is stored in the levitation float storage capsules 22, 22, and when compressed air is sent from the pneumatic hose 54, the levitation float storage capsules 22, 22 open and the rubber levitation float (not shown) is stored. The floating float expands and floats the underwater traveling sand removal device 10.

In this configuration, bulky objects in the forward direction of the tracked vehicle 11 are scooped up by the rake device 12 and stored and removed in the bulky object storage box 18.
The sand, etc. 5 is thrown up into the screw cover 44 by the drive of the rotary shaft 41 in the rear screw conveyance device 13 and gathered from the left and right to the center, and is transported from the center of the screw conveyance device 13 into the water via the cylinder 45. The sand is sucked in by the sand discharge pump 16 and discharged to the outside of the water intake tank 4 via the drainage hose 50. Here, in the screw transport device 13, the screw-shaped fins 42 are driven by the rotation of the rotary shaft 41, and the sand and mud are thrown up from both sides inside the screw cover 44 and collected in the center, so that the sand and the like 5 are collected in the screw cover 44. It does not fly up to the outside of the screw cover 44 and does not pollute the water quality. The working status of the tracked vehicle 11 in the front and rear directions can be monitored by underwater television cameras 19, 19, and underwater movement is monitored by underwater flashing lights 20, 20 and underwater revolving lights 21, 21 arranged upward. Sand removal device 1
The position of 0 can be visually confirmed from the ground.

In this way, while monitoring the work with the underwater television cameras 19, 19, the tracked vehicle 11 moves forward on its own and travels freely over the bottom of the water intake tank 4, kicking up the sand, etc. 5 that has accumulated. It can be reliably sucked and discharged without polluting the water quality. Even when the tracked vehicle 11 is running, the drainage hose 50, the power cable 52, the control cable 53, and the pneumatic hose 54 are connected to the plurality of floats 55, 55...
As a result, the excess portion floats on the water surface, and the tracked vehicle 11 does not run over and damage the vehicle, making it easy to operate.

In addition, in the above embodiment, the work of discharging sand and mud accumulated on the bottom of the water intake tank 4 of a nuclear and thermal power plant was explained as an example, but the underwater traveling sand evacuation device 10 of the present invention is also applicable to a sand settling basin of a water supply facility. Of course, it is useful for discharging sand and mud accumulated in settling basins of sewage facilities, water intakes and discharge ports of hydroelectric power plants, water intake tanks of general pumping and drainage pumping stations, etc.

(Effects of the Invention) As explained above, according to the underwater traveling sand removal device according to the present invention, large objects can be scooped up and recovered by the rake device installed at the front of the tracked vehicle that can self-propel underwater. The screw transport device installed at the rear collects the sediment in the center without raising it up into the water, and the submersible sediment pump sucks it up, making it possible to discharge the sediment out of the water. Moreover, the excess cables and drainage hoses installed between the tracked vehicle and the control panel on the ground to control the operations of the rake device, screw transport device, submersible sand removal pump, etc., are floated on the water surface. This prevents damage from being run over by a tracked vehicle while it is running. Therefore, it is easy to operate the tracked vehicle, and the bottom of the tank can freely run on its own to carry out sand removal work safely and easily, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the underwater traveling sand discharging device of the present invention, FIG. 2 is a side view of the underwater traveling sand discharging device of FIG. 1, and FIG. FIG. 4 is a diagram explaining the use of the underwater traveling sand removal device,
The figure is a diagram illustrating the collection of sand etc. by the screw transport device and the suction by the submersible sand removal pump. Figure 5 explains the conventional sand removal work in which the submersible sand removal pump is suspended into the water intake tank by a crane. Figure 6 is a diagram illustrating the conventional sand removal work in which a bucket is suspended into a water intake tank by a crane, and Figure 7 is a diagram for explaining underwater sand removal from a girder crane installed above the water intake tank. It is a figure explaining the conventional sand removal work which suspends a sand pump. 10: Underwater sand removal device, 11: Tracked vehicle,
12: Rake device, 13: Screw conveyance device,
16: Submersible sand removal pump, 17: Control unit, 1
8: Oversized item storage box, 43: Finn, 44:
Screw cover, 45: Cylindrical body, 50: Drain hose, 51: Control panel, 52: Power cable, 53:
Control cable, 55: float.

Claims (1)

[Claims] 1 A rake device is installed at the front of a tracked vehicle that can self-propel underwater to scoop up bulky items by moving up and down and collect them in a bulky storage box, and at the rear, screw-like fins rotate to move the piles left and right. A screw conveying device is arranged so as to be able to move up and down, and a screw cover that covers the upper part of the fins of this screw conveying device is provided with an opening in the center to connect to the suction port of the submersible sand removal pump. Then, the discharge port of the submersible sand removal pump is led out of the water with a drainage hose, and a control cable and a power cable are connected between the control unit mounted on the tracked vehicle and the control panel installed on the ground. 1. A submersible sand-discharging device characterized in that a plurality of floats are arranged on these control cables, power cables, and said drainage hose so that the excess portion floats on the water surface.