Suction anchor that automatically removes soil plugs

Abstract

The invention discloses a suction anchor capable of automatically eliminating soil plugs, which comprises an anchor barrel with an open lower part, a drainage hole communicating with the interior of the anchor barrel is provided on the top of the anchor barrel, and a center part of the inner top of the anchor barrel is installed with a bearing through a bearing. A rotatable nozzle connected to the outside world; the inner ring of the bearing is integrated with the top cover of the anchor tube, and the bearing is hollow to form a channel for the rotatable nozzle and connected to the outside; the upper half of the rotatable nozzle is a short hollow tube with the same diameter as the outer ring of the bearing , the upper end of the hollow short tube is fixedly connected with the outer ring of the bearing; the lower part of the rotatable nozzle is a hollow semi-disc body, and the plane section of the semi-disc body is sealed and connected with the lower end surface of the hollow short tube. The cavity of the tube communicates with the hollow of the semi-disc body, and the arc-shaped edge of the semi-disc body is provided with water diversion valves with angles of 0°, 30°, 45°, 60° and 90° to the cross-section of the half-disk body respectively. Conduit, the water diversion conduit communicates with the hollow of the semi-disc body. The suction anchor has a simple structure, is convenient to use, and can eliminate soil plugs.

Description

technical field [0001] The invention relates to a civil technology, in particular to a suction anchor capable of automatically eliminating soil plugs. Background technique [0002] Suction anchor is a basic form with good development prospects in ocean engineering. It can be used to provide mooring force for ships, and can also be used as the basic structure of structures such as offshore platforms. Suction anchors are widely used due to their simple construction, safe and reliable use, and reusability. Its structure is generally a barrel-shaped structure with a closed top. The side wall of the anchor tube is made of steel, and the top cover is generally made of steel and reinforced concrete. There are water holes on the top cover of the anchor tube to connect the pumping pipeline. At first, it sinks into the seabed to a certain depth with the help of gravity, and then uses an underwater submersible pump to pump out the water in the cylinder to form a pressure difference be...

AI Technical Summary

Problems solved by technology

The suction anchor includes an anchor tube and a reinforcing plate connected with a skirt, which solves the problems of high construction cost of the suction foundation, small horizontal bearing capacity, and erosion of the seabed soil around the upper part of the barrel, but the suction anchor cannot eliminate the problem of soil erosion. plug phenomenon

[0007] (3) The Chinese patent application with application number 200910225767.3 introduces an expansion-tight deep-sea suction anchor and its installation method, which can increase the vertical bearing capacity and pull-out resistance of the deep-sea anchor, and reduce the difficulty of offshore installation , but the suction anchor and installation method cannot eliminate the soil plug phenomenon

When the suction anchor has soil clogging, it is necessary to turn off the submersible pump and coordinate the working status of the two submersible pumps; open the valve on the injection pipe to a certain depth of mud according to the accumulated height of the seabed soil, and turn on one submersible pump. The submersible pump connected to the outlet of the pipe is in the working state of injecting high-pressure water into the main cylinder, so that the sprayed high-pressure water forms a state similar to mud inside the main cylinder, and the other submersible pump is in the state of pumping water, pumping the mud out of the barrel In addition, although this installation method can eliminate certain soil plugs, the structure of the installation equipment is complicated, the operation is inconvenient, and the construction difficulty is increased, and the automatic removal of soil plugs cannot be realized.

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