Method for processing metallic chain link fence hanging net for marine anti-pollution tests and method for tying same

Abstract

The invention provides a method for processing a hanging metallic chain link fence for marine anti-pollution tests and a method for tying the hanging metallic chain link fence. In the methods, pentatrico-peptide-repeats (PPR) pipes, cables and the metallic chain link fence are used. The invention is characterized in that: steel cables are arranged at the periphery of the square-shaped metallic chain link fence with the size of 0.50m*0.50m; the outer side at the upper end of the metallic chain link fence is tied with a PPR pipe; a high-strength eight-strand fishing polythene cable of which the diameter is 14mm and the length is 6.7m passes through the PPR pipe, both ends of the cable are tightened and aligned, and then tied to net cage floating pipes, the linear distance between two tying points is 0.5m, and the lengths of the cables between the tying points of the net cage floating pipe and the axial line of the PPR pipe are 1.5m; and one end of the high-strength eight-strand fishing polythene cable with the diameter of 16mm and the length of 4.0m passes through and encircles the PPR pipe, the steel cable and the metallic chain link fence from the center point of the PPR pipe and then forms an eye splice, and the other end of the high-strength eight-strand fishing polythene cable with the diameter of 16mm is tied to the net cage floating pipe.

Description

technical field [0001] The invention relates to a hanging net for anti-fouling tests of metal orthorhombic nets at sea in the field of net cage engineering. Background technique [0002] Marine fouling organisms, also known as marine fouling organisms, are animals, plants and microorganisms that grow on the surface of marine facilities. Due to the smooth water flow and sufficient bait in the cage culture sea area, the larvae and spores of fouling organisms float and swim to the cage facilities and then attach and settle down, resulting in a large number of marine fouling organisms attached to the synthetic fiber fishing nets used in the cages. For this reason, people often use net clothing antifouling coatings to carry out antifouling treatment on net cage synthetic fiber fishing nets, and form a protective layer around the net clothing materials through the releasable antifouling agent in the net clothing antifouling coatings to prevent or Reduce the adhesion and fouling o...

AI Technical Summary

Problems solved by technology

[0005] The outstanding feature of the present invention is that the hanging net frame is composed of seawater corrosion-resistant PPR pipe and high-strength fishing three-strand polyethylene rope, which effectively solves the serious corrosion of the iron frame in the sea hanging net test of the existing metal oblique net antifouling effect Problem: The present invention uses a shrinkage coefficient of 0.707 to assemble the netting, so that the weight of the netting does not differ between each other after the metal orthorhombic net is installed on the same frame with the same shrinkage coefficient, ensuring that the hanging net is weighed after the test It is comparable; the hanging net of the present invention adopts three high-strength fishing eight-strand polyethylene ropes of equal length to be tied on the floating pipe of the net cage, which not only makes all the hanging nets be located in the water layer where the marine fouling organisms are distributed similarly, but also ensures the same The anti-fouling effects of hanging nets in different water areas are comparable, and even if one rope breaks during the hanging net test, there are still two other ropes tied to the floating tube of the net cage, which realizes the "safety" of the ropes used for hanging nets. "Three insurances", this effectively prevents the loss of the hanging net used in the sea test, ensures the success of the test, and saves precious time; the present invention uses high-strength fishing eight-strand polyethylene rope as the rope for hanging the net, and its anti-rotation performance is obviously better than The existing hanging net is tied with three ropes, which improves the stability of the hanging net; in the present invention, the hanging net for the test is respectively tied to the floating pipe of the net cage with a distance of 2.5m, which avoids the interaction of the antifouling function caused by the too close spacing of the hanging net. Influence and mutual entanglement between adjacent hanging nets; the present invention replaces ordinary ropes with high-strength ropes, which saves raw material consumption and promotes the development of energy-saving and emission-reducing cage engineering

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