JP2017198067A - Underwater chamber for dredging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dredging device capable of executing dredging work even when an underwater soil surface is weak.SOLUTION: An underwater chamber 1 is a box-shaped rectangular cube, and is opened over the whole surface in a bottom surface part, and has water-bottom traveling four wheels 8 in the bottom part, and executes dredging work by optionally traveling on a water bottom by a plurality of electric underwater screws provided in a four-side surface part of the underwater chamber 1. The underwater chamber 1 discharges sludge and sediment deposited on a water bottom onto the ground by sucking sludge water by a pump installed in an outer wall surface part by agitating on the inside of the underwater chamber 1 by jet-injecting high pressure water toward the water bottom from an injection nozzle when traveling on the water bottom, by installing a plurality of high pressure water injection nozzles in four-side parts of an inside bottom surface part. The dredging work is executed by making a support deck M accompany-travel with the underwater chamber 1 while monitoring a state of the water bottom by an underwater camera provided in a front side surface outer part of a box by a monitoring board provided on the support deck M provided on the water.SELECTED DRAWING: Figure 1

Description

Suspended underwater chamber (1) is suspended on support deck (M) for the purpose of draining sludge, sediments, etc. deposited on the bottom of intakes, small canals, agricultural canals, ponds, etc. The purpose is to perform dredging work efficiently by moving the water surface back and forth 7 or left and right or by rotating 360 ° by operating multiple propulsion submersible screws (DS1 to DS8) attached to the deck. And

The technology for dredging sediment deposited on the bottom of the water is an underwater sand removal robot (Japanese Utility Model Publication No. Hei 6-49300) or an amphibious cleaning device (patent No. 4521986) and a dredging underwater chamber (utility model). No. 3191448).

Patent No. 4521986

Utility Model 6-49300, Utility Model Registration No. 3191448

However, if the underwater soil surface has a large accumulation height, such as sludge, the caterpillar of the underwater bulldozer slips and cannot run. This is the same empirical phenomenon as the phenomenon that the vehicle slips into the mud when driving and the tire slips and cannot run.
In such a case, the dredging work by the underwater bulldozer method becomes impossible, and this becomes a problem solving problem.

Means to solve the problem

Therefore, in order to solve the above-described problem, the present invention is configured to mount the underwater chamber (1) on the support deck (M) and suspend the underwater soil surface when the underwater soil surface is soft, such as sludge. Let's do the dredging work. See Figure 1

The deck (M) is a cube, and is provided with a total of eight propulsion submersible electric screws (hereinafter referred to as DS screws), one at each end of the submerged side surface.
By operating the DS screw, the deck is moved back and forth, left and right, or rotated 360 ° to efficiently perform the dredging work. See FIG. 1, ie:-
Screw (symbol) travel direction
Only DS1 and DS2 operate
Only DS5 and DS6 work Backward movement
DS7, DS8 only works Move right
DS3 and DS4 only work Left move
DS3 and DS7 only work
Only DS4 and DS8 work.
Note: The side where the deck is equipped with an underwater chamber is the front.

The support deck will be divided into two parts in consideration of transportation to the site where dredging takes place. Furthermore, according to the dredging area, in order to increase dredging efficiency, the support deck is connected and the two submerged chambers are operated in parallel. See FIG.
In addition to the DS screw, the support deck includes four guide rails (6) for suspending the underwater chamber, a power / control panel (5), a power terminal (7), and a mobile electric telescopic jib crane. (3), Power / Control panel (5), Power supply terminal (7), Discharge hose rotatable bend pipe (13), Discharge hose ohm-shell bend pipe (11a), Fall prevention fence (17), Impact impact Equipped with a float (18) and a lifeline (16) that also serve as absorption, the deck is provided with a mobile electric jib crane (3), a maintenance space (19) for the underwater chamber, and the like. Refer to FIG.

The underwater chamber is suspended and suspended in water along a guide rail (6) that is lifted using a mobile electric telescopic jib crane (3) and fixed to the support deck. Refer to Fig. 4. When the guide rail is installed in water, the water depth is measured in advance, the guide rail corresponding to the water depth is selected, suspended by a crane and mounted at a predetermined position on the deck, and guided to the guide rail fixing plate (6a). Secure to the same deck with rail stop bar (6b). See FIG. 5 (B). Then, the water Chu chamber is lifted with a crane, and a wapper (6e) attached to the water chamber is fitted into the guide rail. After sinking, the monitor screen provided on the control panel of the deck is equipped with an underwater camera (4) with a light fixture attached to the lower part of the underwater chamber. The position of the contact surface between the flock (brush) (9) attached to the lower part of the underwater chamber and the underwater soil surface is confirmed. In addition, the same position confirmation is arbitrarily performed by moving the guide rail up and down with the crane suspended the submerged chamber. A stopper (10) is provided at the lowermost part of the guide rail to fix the submerged chamber to the lower part of the guide rail.
Regarding the selection of the guide rail length, the guide rail is selected according to the water depth, but the water depth is 3M. In the case of 4.5M. The water depth is 5M. In the case of 6.5M. Sort the guide rails. That is, 1.5M. Sort with a margin.
In consideration of local transport of this guide rail, the maximum length is 6.5M. And
That is, the dredging work when using this guide rail has a water depth of 5M. It is intended for dredging construction of reservoirs, ponds or intake channels within.
Applying the underwater chamber, the water depth is 5M. For dredging work exceeding 1, the dredging work is carried out by another method (described later).

Four wheels (8) are provided on the lower surface of the underwater chamber. The axle of the wheel has a suspension (8b) structure and absorbs the vertical movement of the submerged chamber due to the unevenness of the submerged soil surface. In addition, the wheel is a caster structure and can be rotated 360 °, and a two-sided integrated spike wheel (8a) is adopted so as to cope with unevenness or a soft soil surface. See FIG.

The underwater chamber is the same in structure and function as the utility model registration number No. 3191448 underwater chamber, but when the target deposited on the underwater soil surface is sludge and when sand is accumulated Since the density differs, it is necessary to change the injection pressure from the underwater injection nozzle provided in the underwater chamber. To meet this need, it has the function of changing the injection pressure from the nozzle by changing the rotation speed of the submersible motor loaded in the submersible chamber.
In other words, the VVVF control for controlling the speed of the motor is incorporated into the power / control panel (5) provided in the deck.
On the other hand, the power and control panel mounted on this deck will be equipped with electrical equipment such as the following power terminals, operation switches, and water bottom video monitoring devices. The equipment is:-
・ Power supply terminal for the DS screw and CS screw (described later) and ON / OFF switch for individual screw ・ Power supply terminal for the submersible motor pump that sends pressure water to the submersible injection nozzle provided in the submersible chamber and ON -OFF switch, VVVF inverter rotation speed converter, non-clog pump (P1) attached to the submersible chamber and onshore power supply booster pump (P2) mounted on the deck and ON- OFF switch ・ Power terminal and ON-OFF switch for the jib crane mounted on the deck ・ Underwater monitoring camera attached to the underwater chamber and power terminal for the underwater lighting lamp and ON-OFF switch ・ Same Camera video monitoring and monitoring equipment And depth of the reservoir in the case of the dredging of the overcurrent breaker-ultrasonic transmitter and receiver dam reservoirs ON-OFF switch each device, for example, 20 to 30 m. In this case, it is predicted that the underwater chamber will be missing underwater due to the accidental suspension of the rope or the discharge hose. In preparation for such a case, a transmitter is provided in the underwater chamber, and the position of the underwater chamber is detected by a receiver.

The deck has a drain hose (15) that discharges sludge such as sludge discharged from the submersible chamber to the ground, an ohm shell-shaped 90 ° bend pipe (11a), a gate valve (SV) connected to the hose, and a reverse flow. A prevention valve (CV), a rotatable bend pipe (13), and a power cable rotating reel (7) are provided. See Figure 1

Refer to FIG. 7 for details regarding the seashell-shaped 90 ° bend pipe (11a). The bend pipe smoothly converts the water flow of the rising hose into the horizontal direction on the deck. To connect the discharge hose (15) and the bend pipe, first connect the suction side and then the discharge side, but the bend pipe body is rotatable to facilitate the connection of the hose ( Ohm shell type).

When the water depth is large, for example, when the water depth is 20M or 30M like a dam reservoir, the dredging method using the guide rail is a problem of transportation of the guide rail to the site, or the installation of the deck Problems arise. Therefore, the saddle method that does not use this guide rail is adopted. That is, by installing a plurality of underwater clews (hereinafter referred to as CS screws) in the underwater chamber of the present invention, the operation of the control panel mounted on the deck is performed to select the CS screws and the underwater chamber. It is intended to perform dredging work by running itself at the bottom of the water. See FIG. 8 The underwater chamber has a rectangular cube shape, and each side has four same CS screws on each side of the four sides, and a total of 16 submersible screws (CS1 to CS16) on each side. The CS screw is operated individually to move the water bottom forward, backward, left and right, and rotate freely. At the same time, the underwater camera with a lighting rod is used to monitor the condition of the bottom surface of the water on the monitoring board of the deck. However, the dredging work is performed efficiently. See FIG. 9. Furthermore, four spike-type wheels (8a) with casters are provided at the lower part of the underwater chamber to freely move the water bottom of the underwater chamber, and it can be arbitrarily driven to improve the efficiency of dredging work. Is. Refer to FIG.

The underwater chamber travels arbitrarily along the bottom of the water, but if the underwater chamber is disengaged far away by traveling alone, it is necessary to extend the discharge hose, power cable, and lifting rope. Therefore, it becomes necessary to unnecessarily enlarge the rotating reels (7a) and (15a) around which the reels are wound. Therefore, the DS reel of the same deck is operated to run the same deck along with the underwater chamber so as to avoid an increase in the length of the reel.
On the other hand, the discharge hose installed on land and the rotating reel for the power cable are selected in consideration of the length of the support deck and the size of the reel.

Dredging work by the submerged chamber is carried out by a dredger in the following system. See FIG. 10. The underwater soil surface is attached to the same monitoring deck attached to the same deck with a plurality of underwater cameras attached to the same underwater chamber suspended on the same deck. Monitor and record the ground image on a DVD and present it to the contractor. During this monitoring, the operation of the injection nozzle attached to the underwater chamber is stopped.
(1) The removal work of oversized objects (discarded bicycles, sinking trees, drum cans, stones, ncleet blocks, clothes, etc.) submerged in water is carried out using fork buckets (F). Is done with the consent of the client.
Since this removal work leads to an increase in the cost of dredging work, it is necessary to obtain the consent of the contractor in advance.
▼ 2 Check the location of the oversized object underwater according to the video on the DVD, or re-confirm the position with the underwater camera, lift the oversized barge with a fork bucket and dump it. Bring to shore and land at Backhoe (H).
(3) After removing the coarse substance from the bottom of the water, the submersible chamber is lowered to a predetermined position on the deck with a crane, and the submerged chamber, discharge hose and power cable are attached.
▼ 4 ▼ Control the deck equipped with the control panel and operate the DS screw of the deck to bring the deck to 5M. In the case of exceeding this, the guide rail is not used, but the CS screw provided in the underwater chamber is operated, and the dredging operation is performed by running the underwater chamber together with the deck. .
(5) After completion of the dredging work, the underwater soil condition is again monitored by the underwater camera, recorded on a DVD, and submitted to the orderer to confirm the completion of the work.

  (A) Top view (B) Side view (C) Detailed view of the connecting part (Y) between the underwater chamber and the guide rail   Plan view when two support decks are combined   Perspective view of the support deck (A) Perspective view of one ship (B) Perspective view of two ships connected   Installation work of the submersible chamber using a jib crane installed on the support deck (A) Unloading view of the submersible chamber (B) Suspension installation view of the submersible chamber   Detailed view of guide rail (A) Detailed plan view of guide rail fixed to support deck (B) Detailed elevation view of guide rail fixed to support deck   Detail of installation of underwater chamber wheel (A) Conceptual diagram of suspension for wheel (C) Conceptual diagram of spike type wheel (X section enlarged)   (A) Connection diagram of P1 pump, discharge hose, and ohm shell type bend pipe (B) Deck installation perspective view of ohm shell type bend pipe   Underwater travel concept of underwater travel of underwater chamber for dredging   Conceptual diagram of an underwater chamber with an underwater screw and suspension wheels   Flow chart of dredging work in the use of dredging underwater chamber (A) Search for oversized material by underwater chamber on underwater soil surface (B) Removal of underwater oversized material with fork bucket (C) Mount underwater chamber on support deck (D) Underwater Start dredging work by suspending the traveling underwater chamber from the support deck

1 Underwater chamber for dredging 1a Bumper, underwater chamber 2 Underwater motor pump, for water injection nozzle 3 Electric jib crane 3a Underwater chamber hanging rope 4 Underwater camera with lighting rod 5 Power / control panel 5a Power cable 6 Guide rail, Up and down operation of the same chamber 6a Guide rail fixing plate 6b Guide rail fixing screw 6c Guide rail hanging stopper
6d Lifting hook 6e Wapper 6f Rotor, Wapper 6g Turnbuckle 7 Rotating reel, Power cable 7a Rotating reel, Underwater chamber hanging 8 Wheel with rotating caster, Underwater chamber 8a Spike type wheel 8b Suspension, Wheel 9 Flocking (nylon brush)
10 Lower stopper, guide rail 11 Non-clog pump, chamber attached (also called P1 pump)
11a ohm shell type bend pipe 12 booster pump (also called P2 pump)
13 Rotating bend pipe 14 Hook, lifting chamber, hanging 15 Discharge hose 15a Rotating reel, Discharging hose 15b Land rotating reel, Discharging hose 16 Lifeline 17 Fall prevention fence 18 Air floating bag 18a Baby compressor, for filling air in the floating bag 19 Maintenance space, SV for the submersible chamber Gate valve CV Backflow prevention valve M Support deck DS1-DS8
Underwater screw, support deck CS1-CS16
Submersible screw, submerged chamber F fork bucket J barge H backhoe R float, discharge hose N oversized WL waterline

Claims (1)

The water depth of the target to be dredged (sea water intake channel, small canal, reservoir, dam, etc.) is 5M. In order to remove sludge, earth and sand, etc. (hereinafter referred to as sludge) deposited on the bottom of the water, the lower surface is opened with a rectangular cube, and four wheels for running on the bottom are placed on the bottom. A submersible vehicle equipped with a plurality of high-pressure water jet nozzles for stirring the sludge in the lower four sides of the submerged chamber (hereinafter referred to as the submerged chamber). Equipped with a plurality of submersible electric screws (CS) on the sides of the four-side outer wall of the submersible chamber, and the submersible chamber is arbitrarily driven on the bottom of the water by operating the screw, and the pressure is higher than that of the injection nozzle during the operation. By spraying water into the sludge and stirring the sludge inside the submersible chamber, the sludge is contained by a non-clocking pump installed on the outer wall of the submersible chamber. Possible to discharge the sludge water on the ground and the dredging underwater chamber (1).