JPH08257521A - Apparatus for recovering accumulation in water - Google Patents

Abstract

PURPOSE: To provide a recovery apparatus which can be operated in still water or flowing water to recover an accumulation efficiently, has a simple structure, and is inexpensive and easy of maintenance. CONSTITUTION: This apparatus comprises an recovery apparatus main body 1 which can be installed in a channel C by a crane and a recovery case 12 which is moved down with an open surface 11 formed in the lower surface facing the bottom surface BW of the channel and equipped with a jet nozzle 15 for jetting water toward the open surface 11 from the inner surface of the sidewall 12a of the case 12 and a recovery pump 13 in which a suction port 13a is connected with the upper end of the case 12 and a discharge opening is connected with the ground side through a recovery hose to discharge an accumulation A in the case 12 with water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater sediment recovery apparatus for recovering sediments such as dust, shellfish and algae accumulated in cooling water channels such as power plants and steel plants.

[0002]

2. Description of the Related Art Heretofore, there have been (A) to (C) as means for collecting deposits accumulated in irrigation canals and the like. (A) During periodic inspections when facilities such as power plants stop, water in the waterway is drained, workers enter the waterway, and dredged sediments by hand or using a small machine, bucket crane, etc. Collect using. (B) A submersible pump is put into the waterway to collect sediment along with seawater. (C) An underwater robot equipped with an underwater pump is thrown into the irrigation canal, the seawater is sucked together with the seawater by the underwater robot, and the sediment is collected on land through the collection hose.

[0003]

However, in the above (A), the work cannot be performed without draining the water, and the odor is filled with a rotten odor, which makes the work harsh, and it is difficult to secure workers. Further, there is a problem that the collecting work can be performed only at the time of periodical inspection, and further, the collecting work takes time. Also,
In (B), the deposit can be collected only in a narrow area immediately below the suction port of the submersible pump, which is extremely inefficient. Further, there is a problem that deposits are easily blocked at the suction port. Furthermore (C)
Then, initial capital investment is large, and it is difficult to introduce it easily. In addition, maintenance and inspection after installation is complicated and costly, and the device itself becomes huge, requiring a large storage space and many auxiliary equipment. There was such a problem.

An object of the present invention is to provide an apparatus for recovering underwater sediment which can solve the above problems.

[0005]

In order to solve the above-mentioned problems, an underwater sediment recovery apparatus of the present invention is formed on the lower surface of a recovery apparatus main body which can be charged and discharged into a water channel by a charging and discharging means. The recovery case whose open surface faces the bottom of the waterway and descends, the jet nozzle that injects water from the inner surface of the side wall of the recovery case toward the open surface of the recovery case, and the suction port is connected to the recovery case and the discharge port Is connected to the ground side via a recovery hose and is provided with a recovery pump for discharging the deposits in the recovery case together with water.

In addition to the above construction, a cutting blade is provided on the open surface of the recovery case to divide the deposit accumulated on the bottom of the water channel. Further, in addition to the above configuration, a plurality of inflow ports are formed on the side wall around the open surface of the recovery case, and a swirl nozzle that forms a swirl in the recovery case by injecting water from the side wall of the recovery case is provided. It is a thing.

In addition to the above structure, the recovery device main body is provided with an underwater camera for monitoring the condition inside the water channel.

[0008]

In the above structure, the recovery device main body is thrown into the water channel in the state of water by the charging and withdrawing means, and the recovery device main body is bottomed with the open surface of the recovery case facing the bottom surface. Then, by ejecting water from the jet nozzle toward the open surface, the deposit attached to the bottom surface of the water channel is separated and wound up, and the deposit is recovered by the recovery pump via the recovery hose. Therefore, it is possible to collect the deposit in the range of the open surface of the recovery case, and it is possible to suck and collect the deposit having a very large area compared with the suction port of the conventional recovery pump at once. Further, the entire device can be provided with a simple structure and can be provided at a low cost, can be compactly constructed, and since there is no complicated mechanism, maintenance and inspection can be easily performed.

Further, by providing the cutting blade on the open surface, it is possible to divide the deposit into a plurality of pieces by the weight of the apparatus main body at the time of landing, and the separation effect by the jet nozzle can be greatly improved.

Furthermore, a vortex flow is generated in the recovery case by the vortex flow nozzle, and water in the water channel is sucked from the inflow port around the open surface to accelerate the separation of the sediment by the centrifugal force, and further to collect the sediment. Dispersion enhances fluidity and lowers water pressure. Ascending flow is generated in the central part, which can be efficiently sucked by the collection pump and prevents clogging of the collection pump before it effectively collects sediment. It can be performed.

Furthermore, the collection and collection of the main body of the recovery device can be performed remotely by the underwater camera, and the recovery work can be performed accurately and efficiently while monitoring the condition of the water channel.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an underwater sediment recovery apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 7, the recovery device for the underwater sediment A is composed of a recovery device main body 1 to be put into water and a support facility 2 arranged on the ground side to support the recovery device main body 1. Has been done. This support equipment 2 is a wire rope 3a
Crane 3, which is a loading and unloading means for loading and unloading the recovery device main body 1 into and from the water channel C via a cord body, and the like, transmits and receives an operation signal and a detection signal via a cable 4a, and supplies drive power. The power source operating device 4 and the deposit A collected by the collecting device main body 1 are collected together with water through the collecting hose 5a to separate solid matter from water and drain the water.
It is composed of a solid water separator 5 which returns from b to the water channel C and discharges solids to the pallet 5c.

As shown in FIGS. 1 to 6, the recovery device main body 1 connects the upper and lower circular frames 10a and 10b with the upper and lower circular frames 10a and 10b, and the lower end thereof projects slightly from the recovery device main body 1. A frame-shaped protective frame 10 including four vertical frames 10c serving as bottoming legs and a roof frame 10d fixed in a cross shape is provided on the upper circular frame 10a.
In addition, a bell-shaped recovery case 12 whose bottom surface is formed with an open surface 11 facing the bottom wall BW of the water channel C, and a recovery pump 13 provided above the recovery case 12 are supported. . In the recovery pump section 13, the suction port 13a is connected to the upper end of the recovery case 11, and the drain port 1 is connected to the discharge port 13b.
The recovery hose 5a is connected via 3c.

Then, the side wall 12 at the bottom of the recovery case 12
Two jet nozzles 15 for injecting pressure water from a jet pump 14 provided at the upper part of the recovery device main body 1 through a jet water hose 14 a into the center a of the open surface 11 are provided in a. The bottom wall B of the waterway C provided inside the open surface 11
The colony deposit A attached to W can be separated.

On the open surface 11, as shown in FIG.
A circular first cutting blade 16A hanging from the lower end of the side wall 12a of the recovery case 12, a circular second cutting blade 16B concentrically arranged in the first cutting blade 16A, and a second cutting blade 16B. Linear third cutting blade 16C that divides the inside into two parts
And a linear 2 that divides the inside of the second cutting blade 16B into three parts, left and right.
The fourth cutting blade 16D, which is a single sheet, is attached via a mounting tool, and when the recovery device body 1 bottoms, the deposit A integrally attached to the open surface due to its own weight is divided into a plurality of pieces for easy recovery. With such a large size, the dredging of the deposit A by the jet nozzle 15 can be promoted. Here, the cutting blade 16A
Although ~ 16D is formed of a metal flat plate, it may be formed of a metal wire rope stretched through a support. Further, the side wall 12a around the open surface 11 of the recovery case 12 and the first cutting blade 16A are formed with inflow ports 17A and 17B which are mutually continuous in the vertical direction at regular intervals in the circumferential direction.

As shown in FIG. 3, on the side wall 12 at the middle portion of the recovery case 12, two vortex flows which form water in the recovery case 12 in a tangential direction to form a swirl flow S of right swirling. The nozzle 18 is installed tangentially, and the vertical frame 1
The discharge ports of the two vortex flow pumps 19 provided at 0c are respectively connected via vortex flow water hoses 19a. Further, in order to more effectively form the vortex flow S by the vortex flow nozzle 18, the inflow port 17A formed in the thick side wall 12a is approximately 30 degrees with respect to the normal line so as to follow the flow of the vortex flow S. It is formed to be inclined.

Therefore, the inflow port 17 around the open surface 1
The water in the water channel C is sucked from A and 17B, and a vortex flow S is generated in the recovery case 12 by the vortex flow nozzle 17 to accelerate the separation of the deposit A by the centrifugal force and to disperse the deposit A. It is possible to improve the fluidity and generate an upward flow in the central portion where the water pressure becomes low, so that the recovery pump 13 can efficiently suck, and also the recovery pump 13 can be prevented from being blocked.

Further, a water channel C is provided in front of the recovery pump 13.
An underwater camera 21 and an underwater light 22 that can be remotely operated to monitor the situation inside are arranged.
By sending the video signal captured in step 2 to the power supply operating device 4 via the cable 4a and displaying it on the monitor provided in the power supply operating device 4, the support equipment 2 such as the crane 3 and the recovery device main body 1 are displayed based on the video. It can be operated.

Next, a method of operating the recovery device having the above structure will be described. (1) The collection device main body 1 and the support equipment 2 are transported to a work site by using a set, a vehicle, and the like, arranged around the work site, and necessary cables and hoses are connected to perform a preparatory work.

(2) Protect the wire rope 3a from the frame 1
The recovery device main body 1 is suspended by connecting to 0, and is thrown into the water channel C through the opening RM. At this time, rotation of the recovery device main body 1 is prevented by the recovery hose 5a. While being charged, the underwater camera 21 is operated, and the wire rope 3a of the crane 3 is unwound while the bottom of the work place is monitored by the monitor, and the recovery device body 1 is bottomed.

(3) After confirming the bottom with the underwater camera 21, the recovery pump 13, the jet pump 14 and the swirl pump 19 are activated, and the jet water jetted from the jet nozzle 15 causes the first to fourth cutting. The deposit A divided by the blades 16A to 16D is separated from the bottom wall BW of the water channel C and floated, and swirl water jetted from the swirl pump 19 generates a clockwise swirl S in the recovery case 12, Entrance 1
The water and the vortex S flowing in from 7A and 17B generate an ascending flow U in the center of the vortex S that is a negative pressure to be sucked by the recovery pump 13, and the sediment A is collected from the recovery pump 13 by the recovery hose 5a. Discharge with.

At this time, since the lower end of the vertical frame 10c projects slightly below the recovery case 12, the first frame
The fourth cutting blades 16A to 16D do not contact the bottom wall BW of the water channel C and damage the bottom wall BW of the water channel C.

(4) The deposit A sucked up from the recovery hose 5a is separated from water by the solid water separator 5 and is then transferred to the pallet 5
The water discharged and collected in c and separated is returned into the water channel C from the drain hose 5b.

(5) Most of the sediment A from the solid water separator 5
Crane 3 and recovery hose 5
By a, the recovery device body 1 is lifted and moved to the next recovery location. At this time, the moving state is confirmed by the underwater camera.

(6) When the recovery is completed by repeating the above procedure, the recovery device main body 1 is recovered in the reverse procedure.

According to the above embodiment, the recovery case 12 having the open surface 11 is provided with the bottom wall B of the water channel C to which the deposit A adheres.
Since the deposit A in the open surface 11 is separated by the jet water from the jet nozzle 15 and collected by the recovery pump 13 even if it is still water or running water,
The deposit A can be collected in the range of the two open surfaces 11, and the deposit A having an area about 80 times wider than that of the suction port of the conventional collection pump can be sucked and collected at one time. In addition, compared to a self-propelled cleaning robot, the entire device can be configured with a simple structure, can be provided at low cost, can be configured compactly, and has no complicated mechanism, so maintenance and inspection can be easily performed.

In addition, the first to fourth cutting blades 16 are provided on the open surface 11.
By providing A to 16D, the deposit A can be divided into a plurality of pieces by the weight of the recovery device main body 1 at the time of landing, and the separated deposits A are separated by the jet water jetted from the jet nozzle 15. Therefore, it is possible to effectively remove the deposit A adhered over a wide area, compared to separating the deposit A at once.

Further, the swirling water jetted from the swirling nozzle 18 generates a swirling flow in the recovery case 12, which promotes the separation of the deposit A by its centrifugal force, and also disperses the deposit A to cause fluidity. Can be increased. Further, by sucking the water in the water channel C from the inflow ports 7A and 17B around the open surface and the suction port 13a of the submersible pump 13 arranged at the center of the top of the recovery case, the center of the vortex S where the water pressure becomes low The upward flow U can be generated in the portion, the collection pump 13 can efficiently suck the same, and the collection pump 13 can be prevented from being blocked.

Furthermore, the submersible camera 21 allows the collection and withdrawal and movement of the main body 1 of the recovery device to be performed by remote control, and the recovery work can be performed accurately and efficiently while monitoring the condition of the water channel C.

[0031]

As described above, according to the underwater sediment recovery apparatus of the present invention, the recovery apparatus main body is inserted into the water channel in the state of water by the injection and collection means so that the open surface of the recovery case is the bottom surface. And the bottom of the recovery device body. Then, by injecting water from the jet nozzle toward the open surface, the deposit adhered to the bottom surface of the water channel is separated and rolled up,
The collection pump collects the deposit through the collection hose. Therefore, it is possible to collect the deposit in the range of the open surface of the recovery case, and it is possible to suck and collect the deposit having a very large area compared with the suction port of the conventional recovery pump at once. Further, the entire device can be provided with a simple structure and can be provided at a low cost, can be compactly constructed, and since there is no complicated mechanism, maintenance and inspection can be easily performed.

Further, by providing the cutting blade on the open surface, it is possible to divide the deposit into a plurality of pieces by the weight of the apparatus main body at the time of bottoming, and the separation effect by the jet nozzle can be greatly improved.

Furthermore, a vortex flow is generated in the recovery case by the vortex flow nozzle, and the water in the water channel is sucked from the inflow port around the open surface to accelerate the separation of the sediment by the centrifugal force, and further to collect the sediment. Dispersion enhances fluidity and lowers water pressure. Ascending flow is generated in the central part, which can be efficiently sucked by the collection pump and prevents clogging of the collection pump before it effectively collects sediment. It can be performed.

Furthermore, the underwater camera allows the collection and collection of the main body of the collection device to be performed remotely, and the collection work can be performed accurately and efficiently while monitoring the condition of the water channel.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of an embodiment of a recovery case of a recovery device body according to the present invention.

FIG. 2 is a sectional view taken along line I-I shown in FIG.

3 is a sectional view taken along line II-II shown in FIG.

FIG. 4 is an overall front view of the recovery device body.

FIG. 5 is an overall side view of the recovery device body.

FIG. 6 is a partially cutaway plan view of the recovery device body.

FIG. 7 is an overall configuration diagram of the recovery device.

[Explanation of symbols]

 1 Recovery Device Main Body 2 Support Equipment 3 Crane 4 Power Supply Operation Device 5 Solid Water Separator 5a Recovery Hose 10 Protective Frame 11 Open Surface 12 Recovery Case 12a Sidewall 13 Recovery Pump 13a Suction Port 13b Discharge Port 14 Jet Pump 15 Jet Nozzle 16A-16D 1st-4th cutting blade 17A Inflow port 17B Inflow port 18 Eddy current nozzle 19 Eddy current pump 21 Underwater camera C Water channel BW Bottom wall S Eddy current A Deposit U Upflow

Front page continuation (72) Inventor Yutaka Yamada 5-3-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Manabu Miura 5-28-3 Nishijojo, Konohana-ku, Osaka City, Osaka Issue Hitachi Shipbuilding Co., Ltd.

Claims (4)

[Claims] 1. A recovery case in which an open surface formed on a lower surface faces a bottom of a water channel in a recovery device main body which can be charged / unloaded into a water channel by a loading / unloading means, and recovery from an inner surface of a side wall of the recovery case. The jet nozzle that injects water toward the open surface of the case, the suction port is connected to the collection case, and the discharge port is connected to the ground side through the collection hose, and the deposits in the collection case are discharged together with water. And a recovery pump for recovering the underwater sediment. 2. The underwater sediment recovery apparatus according to claim 1, wherein a cutting blade for dividing the sediment accumulated on the bottom of the water channel is provided on the open surface of the recovery case. 3. A plurality of inflow ports are formed on the side wall around the open surface of the recovery case, and a swirl nozzle is provided to inject water into the recovery case from the side wall of the recovery case to form a swirl flow in the recovery case. The underwater sediment recovery device according to claim 1 or 2. 4. The underwater sediment collection apparatus according to claim 1, wherein the collection apparatus main body is provided with an underwater camera for monitoring the condition in the water channel.