Assembling type structure of symmetric wing type net cage floating tube frame and construction method

Abstract

The invention discloses an assembling type structure of a symmetric wing type net cage floating tube frame and a construction method. The assembling type structure is composed of a wingtip component (1), a wing tail component (2) and two wing side components (3), wherein the wingtip component (1) is provided with an arc metal tube (11) and two metal flanges (12); the wing tail component (2) is provided with a V-shaped tube (21) and two connecting flanges (22) made of the same material as the V-shaped tube (21); each wing side component (3) is provided with an HDPE straight tube (31) and two HDPE flanges (32). According to the assembling type structure, the high-precision symmetric wing type outer contour can be constructed, the structure conforms to the single point mooring using characteristic of the symmetric wing type net cage floating tube frame, and the assembling type structure has the advantage of being low in building cost; the construction method has the advantages of being high in construction precision and high in speed.

Description

technical field [0001] The invention relates to an assembled structure and a construction method of a floating tube frame of a symmetrical airfoil net cage. Background technique [0002] like figure 1 and figure 2 As shown, the Chinese invention patent CN201510014514.7 discloses a cage system with a symmetrical airfoil section, the cage system is provided with a symmetrical airfoil cage floating tube frame 1 with a symmetrical airfoil cross section, so that it is hung on The adaptability of the net clothing under the symmetrical airfoil net cage floating tube frame 1 has formed a culture space with a symmetrical airfoil in cross section; As the frame mooring point of the mooring cable 2, to form a single point mooring system, the front pipe section of the symmetrical airfoil net cage floating pipe frame 1 and the net clothing front corresponding to the front pipe section are in the net cage system. Under the stable state, it can become the upstream surface, so it can eff...

AI Technical Summary

Problems solved by technology

[0005]First, due to the symmetrical airfoil outer profile of the floating tube frame of the symmetrical airfoil cage, its curvature changes continuously, so the above-mentioned circular cage cannot be used The construction method of the floating tube frame is constructed with a single specification of HDPE pipe; and if on the basis of the above-mentioned construction method of the circular net cage floating tube frame, HDPE pipes of various specifications are used for construction to form a symmetrical airfoil shape outline, there are problems that the process is difficult to realize, and the construction is extremely difficult and costly

[0006]Second, because the floating tube frame of the symmetrical airfoil cage is on the midline L (see Figure 2) The greater the length in the direction, the smaller the width in the direction perpendicular to the center line L, the symmetrical airfoil net cage floating tube The smaller the front flow area of ​​the frame, the smaller the resistance of the cage system to the water flow, that is, the better the effect of the floating tube frame of the symmetrical wing-shaped cage; however, the length of the floating tube frame of the symmetrical wing-shaped cage And the width change also brings about the problem that the curvature of the front pipe section near the leading edge position 1a will be larger, and the curvature will exceed the bending curvature critical value of the HDPE pipe in the elastic range, so that the HDPE pipe located in the front pipe section Bring safety hazards to the floating tube frame of the symmetrical airfoil cage

[0007]Third, because the floating tube frame of the symmetrical airfoil net cage needs to cooperate with the single point mooring system to achieve the optimization of its effect, thus making it the mooring point of the frame The leading edge position of the floating tube frame of the symmetrical airfoil net cage not only needs to be subjected to the mooring rope's mooring stress all the year round, but also needs to bear high-strength sudden loads in high sea conditions, which affects the creep resistance and bending resistance of HDPE materials. It is a severe test. Through the analysis of the damage, bending and fracture of the floating pipe frame of the net cage by typhoons over the years, the HDPE pipe is not capable of resisting the concentrated load at the securing point; moreover, the V of the floating pipe frame of the symmetrical airfoil net cage The tail of the shape also forms an excessive stress concentration point and is easily damaged

[0008]Fifth, since the perimeter of the cage floating tube frame used for deep-water aquaculture is generally between 40m and 120m, its size is relatively large, and the symmetrical airfoil net The floating tube frame of the tank is also an arc-shaped structure with continuously changing curvature, which makes it difficult to guarantee the construction accuracy of the floating tube frame of the symmetrical airfoil cage

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