Pump pressure type method of sinking floating net cage and control device

Abstract

A pumping method and equipment for controlling the sinking or floating of mash case features that the main floating pipe of mesh case has the air and water inlets and outlets, which are connected via the flexible air tubes and water tubes to the submerged pump and inflating pump respectively and the sinking-floating control box of a remote sinking-floating controller for mesh case has the buoy or floating ball at its bottom, the automatic control circuit, inflating pump and electromagnetic valves for connecting said flexible air and water tubes. When a remote sinking or floating instruction is sent to said control box in wireless mode, the water or air is filled in said main floating pipe for sinking or floating the mesh case.

Description

technical field [0001] The invention belongs to the technical field of seawater net cage culture, and in particular relates to a method and a control device for pumping net cage ups and downs. Background technique [0002] In recent years, my country's deep-sea cage aquaculture industry has achieved rapid development in China with the implementation of the national industrial structure adjustment-reduction of ships and conversion of production policies. In just a few years, my country's large-scale deep-sea anti-wind and wave net cages have been upgraded from simple introduction to independent development and industrial production. The product has been reduced by 1 / 2 to 2 / 3, some cage products have entered the international market, and a number of large-scale cage culture test demonstration bases have been established. Deep sea cage culture is gradually developing into a new high-tech industrialization industry. industry. According to preliminary statistics, my country has d...

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Problems solved by technology

According to preliminary statistics, my country has developed about 3,300 large-scale deep-sea cages, but less than 10% of them can be used in typhoon-prone sea areas.

On the whole, there are three main sinking and floating methods of sinking and floating anti-wind and wave cages: the first is to hang a large number of counterweight sinkers on the bottom of HDPE cages or steel pipe frame cages, and the sinking force generated by them will make the seawater sink. Through the HDPE floating pipe of the cage or the underwater water inlet at the bottom of the buoy of the steel cage cage, it automatically enters the pipe, so that the buoyancy of the floating pipe or buoy of the cage is smaller than the sinking force, so as to realize the sinking of the cage; the characteristics of this method In the process of sinking and floating of the net cage, the inclination angle of the net cage frame is relatively large, and the requirements for the balanced water intake of the floating tube compartment or the buoy are very high; in the test and actual production, the wind, waves, and currents have caused the net The impact of the impact of the box or the uneven counterweight on the balanced water intake of the net cage makes the water intake of the net cage frame slow, and the outlet pipe on the side where the sinking is small is blocked by water, and the exhaust cannot be exhausted, causing the net cage to fail to sink completely. in the water

The second is that the floating frame of the net cage does not enter the water, and a sinker with a weight greater than the buoyancy of the frame and a corresponding buoy balance adjustment system are added to the bottom of the net cage, and the water intake and inflation of the buoy balance adjustment system are controlled to change. The relationship between the sinking force and buoyancy of the cage is to achieve the purpose of sinking and floating of the cage; the characteristic of this kind of cage is that it can sink and float smoothly, but the weight at the bottom of the cage is relatively large, and the requirements for the frame structure of the cage are relatively high , especially the design and production of the support ring at the bottom of the net is very difficult, and at the same time, the work of changing the net of the net cage is also cumbersome and difficult

But sinking and floating net cages are rarely used in actual aquaculture production. The main reason is that the sinking and floating system of sinking and floating net cages is not very mature in some links. The self-sinking problem when getting the sinking and floating command to avoid the typhoon, because the water inlets of the cage sinking and floating system are all set in the underwater part of the floating tube of the cage frame or the bottom of the buoy, the system’s charging and exhausting pipelines and valves have a small amount of air leakage, Water leakage, after reaching the critical state of sinking and buoyancy over time, can suddenly cause self-sinking of the net cage without people noticing it, causing losses in breeding safety and other aspects

In addition, the sinking-floating cages are installed at sea all the year round, and the underwater water inlet of the sinking-floating system of the cages is quickly blocked by some algae and shellfish after being underwater all the year round, which seriously affects the speed of the sinking and floating of the cages, and even causes the cages to lose weight. ups and downs of failure

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