Suction anchor capable of automatically removing soil plugs

Abstract

The invention discloses a suction anchor capable of automatically removing soil plugs. The suction anchor capable of automatically removing soil plugs comprises an anchor barrel with the open lower portion. A drainage hole communicating with the interior of the anchor barrel is formed in the top of the anchor barrel. A rotary sprayer communicating with the outside is installed on the center portion of the top inside the anchor barrel through a bearing. The inner ring of the bearing and a top cover of the anchor barrel are connected into a whole. The bearing is hollow, so that a channel for the rotary sprayer is formed, and the channel is connected with the outside. The upper half part of the rotary sprayer is a short hollow tube with the same diameter as the outer ring of the bearing, and the upper end of the short hollow tube and the outer ring of the bearing are fixedly connected into a whole. The lower half part of the rotary sprayer is a semicircular disc with the hollow inside, and the planar fracture surface position of the semicircular disc is in sealed connection with the lower end face of the hollow short tube. The cavity of the short hollow tube communicates with the cavity of the semicircular disc. Water guiding tubes are arranged at the arc edge of the semicircular disc, and the included angles between the water guiding tubes and the fracture surface of the semicircular disc are 0 degree, 30 degrees, 45 degrees, 60 degrees and 90 degrees correspondingly. The water guiding pipes communicate with the cavity of the semicircular disc. The suction anchor is simple in structure, convenient to use and capable of removing 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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