Device for preventing mud sand from entering bottom end of buoyancy vertical pipe of net cage frame

Abstract

The invention relates to a device for preventing mud sand from entering the bottom end of a buoyancy vertical pipe of a net cage frame, and relates to technical equipment of cultivation net cages. The device is in a shape of a cylinder of which the opening is upwards, and a lower opening of the cylinder is provided with an elastic cover plate; a plurality of vertical edges are distributed in the cylinder uniformly in a radial shape; outer edges of the vertical edges are connected with the inner wall of the cylinder, inner edges of the vertical edges are connected with the outer wall of an annular nut in the cylinder; inner edges of a part in which the vertical edges are positioned above the nut incline towards the inner wall of the cylinder, and inner edges of a part in which the verticaledges are positioned below the nut are connected the outer wall of a bottom plate; the vertical edges form a vertical through hole and a traverse through hole for opening on the bottom plate; the traverse through hole is communicated with an inner cavity of the nut and a central through hole of a valve plug of a water inlet / drainage valve; the lower part of the valve plug of the water inlet / drainage valve is in threaded connection with the nut, and the upper part of the valve plug of the water inlet / drainage valve is fixedly arranged at an opening in the center of the bottom end of the buoyancy vertical pipe; and a top surface of the valve plug of the water inlet / drainage valve is in an inverted conical shape. The device is scientific and reasonable in design and stable and reliable in operation; and when the net cage sinks to the sea bottom, the mud sand can be prevented from entering the buoyancy vertical pipe, and the water inlet / drainage valve is not blocked, so that the water inlet / drainage valve operates flexibly and normally, and a self-balancing sink-float function of the net cage is stable and reliable.

Description

Technical field: [0001] The invention relates to technical equipment for breeding net cages, and mainly refers to a device for preventing mud and sand from entering the bottom of the buoyancy standpipe of the net cage frame. Background technique: [0002] An advanced marine culture net cage with self-balancing sinking and floating functions. Its frame is constructed by multiple vertical buoyancy risers and horizontally connected pull pipes between the upper and lower ends of the buoyancy risers. The valve has an inlet and outlet valve at its bottom, which together with the charging and exhausting device constitutes a net cage self-balancing sinking and floating system. There is a defect in the existing system, that is, the lower opening of the spool of the drain valve at the bottom of the buoyancy riser, so when the net cage is on the seabed and needs to float up, the seabed mud and sand will easily enter the buoyancy riser with the sea water through the lower opening, and s...

AI Technical Summary

Problems solved by technology

There is a defect in the existing system, that is, the lower opening of the spool of the drain valve at the bottom of the buoyancy riser, so when the net cage is on the seabed and needs to float up, the seabed mud and sand will easily enter the buoyancy riser with the sea water through the lower opening, and silt it. In the end, the lower opening of the valve core will be blocked, and the function of water intake and drainage and the self-balancing ups and downs of the net cage will be lost. If some buoyancy risers are unblocked while others are blocked, rollover damage accidents will easily occur during the ups and downs of the net cage

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