Gravity type culture net cage

Abstract

A gravity type culture net cage comprises a floating frame device, a net cage bottom ring and a netting. A plurality of sinkers are fixedly connected to the net cage bottom ring; the netting is mounted between the lower edge of the annular floating frame and the upper edge of the net cage bottom ring in a covering manner to form a net cage side wall, and is mounted on the inner side of a ring body of the net cage bottom ring in a covering manner to form a net cage bottom wall; the netting is composed of composite braided wires, and the composite braided wires comprise ultra-high molecular weight polyethylene core wires and polyformaldehyde rubber-covered wires; and the polyformaldehyde rubber-covered wire is wound and wrapped on the outer side of the ultra-high molecular weight polyethylene core wire. According to the invention, the sinker counterweight can be reduced so as to reduce the construction difficulty in the sea, and the volume and load resistance strength of the culture net cage and the wear resistance of the netting are comprehensively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and particularly relates to a gravity-type aquaculture cage. Background Art

[0002] Cage farming is a common aquaculture technology. Among them, gravity-type aquaculture cages are a commonly used deep-water cage farming equipment. Gravity cages mainly include: floating frames and net systems. Among them, the net is the most important component of the cage, which is mainly used to provide aquaculture space, prevent fish from escaping, and avoid natural enemies. The existing gravity-type aquaculture has the following problems: First, in practice, the net bears most of the load of the ocean current on the cage. Therefore, compared with other components on the cage, the net is prone to displacement and deformation under the external force of the water flow, resulting in reduced aquaculture space and crowded and easily damaged aquaculture fish. Secondly, the net is subjected to continuous friction with the frame due to the action of seawater during use, which makes it easy to break the net after long-term use. In addition, the net density of the existing gravity-type aquaculture cage is usually less than the density of seawater. Therefore, in practical applications, it is necessary to set a larger counterweight for the sinker, and the larger counterweight of the sinker will further increase the difficulty of workers working in the sea. Therefore, how to develop a new structure of offshore aquaculture device to overcome the above-mentioned problems in the prior art is a direction that technicians in this field need to further study. Summary of the invention

[0003] The object of the present invention is to provide a gravity-type aquaculture cage, which can reduce the weight of the sinker and comprehensively improve the cage volume, load resistance and wear resistance.

[0004] The technical solution provided by the present invention is a gravity-type aquaculture cage, which comprises:

[0005] Floating frame device;

[0006] A bottom ring of the net box, to which a plurality of sinkers are fixedly connected;

[0007] A net, wherein the net is installed between the lower edge of the annular floating frame and the upper edge of the bottom circle of the net box to form the side wall of the net box, and is installed inside the circle of the bottom circle of the net box to form the bottom wall of the net box; the net is composed of a composite braided wire, and the composite braided wire includes an ultra-high molecular weight polyethylene core wire and a polyoxymethylene leather wire; the polyoxymethylene leather wire is wrapped around the outside of the ultra-high molecular weight polyethylene core wire.

[0008] Preferably, the ultra-high molecular weight polyethylene core wire is made by twisting 5-25 strands of 1000dtex ultra-high molecular weight polyethylene fibers; the polyoxymethylene sheath wire includes 6 strands of polyoxymethylene monofilaments with a diameter of 0.10-0.25mm, and the 6 strands of polyoxymethylene monofilaments are wrapped around the outside of the ultra-high molecular weight polyethylene core wire by a braiding machine.

[0009] Preferably, the net is woven by the composite braided wire into a single knot structure in a diamond mesh shape, and the side length of the mesh is 10-40 mm.

[0010] Preferably, the floating frame device comprises: an inner floating tube, an outer floating tube, a horizontal connecting column, a vertical connecting column and a handrail;

[0011] The inner floating tube, the outer floating tube and the handrail are all circular tube bodies extending in the horizontal direction;

[0012] The inner floating tube is located in the horizontal inner circle of the outer floating tube, and the two ends of the column body of the horizontal connecting column are fixedly connected to the inner floating tube and the outer floating tube through connecting pieces respectively.

[0013] The handrail is located above the level of the inner floating tube, and two ends of the column body of the vertical connecting column are fixedly connected to the inner floating tube and the handrail through connecting pieces.

[0014] Preferably, the bottom ring of the cage is in a circular shape, 6-12 sinkers are evenly distributed on the bottom ring of the cage, and the weight of the sinkers is 50-150 kg.

[0015] By adopting the above technical solution:

[0016] Polyoxymethylene monofilament as a leather line has a higher density (about 1.42g / cm 3 ) and high wear resistance, ensuring that the net itself has sufficient weight, thereby reducing the weight of the sinker on the net cage, and thus reducing the difficulty of work for workers when working in the sea. At the same time, it overcomes the problem of easy breakage caused by high-frequency friction between the net and the floating frame, and improves the overall service life of the equipment. The ultra-high molecular weight polyethylene fiber as the core wire ensures that the net has a high strength, so that the net will not be easily displaced and deformed under the external force of the water flow, and then, while ensuring the aquaculture space, the design width of the braided wire on the net is reduced, thereby expanding the mesh size, thereby further reducing the water resistance of the equipment.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] Firstly, the present invention can effectively reduce the weight of the sinker, thereby reducing the difficulty for workers to work in the sea.

[0019] Secondly, the present invention increases the strength of the net, so that the net will not be easily displaced and deformed under the external force of water flow.

[0020] Thirdly, the present invention improves the wear resistance of the net, thereby increasing the service life of the equipment.

[0021] Finally, the present invention has a simple structure and is easy to prepare and use on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the composite braided wire in the present invention.

[0024] Figure 3 It is a schematic diagram of the connection structure of the inner floating tube, the outer floating tube and the handrail in the present invention.

[0025] In the figure, the component names corresponding to the reference numerals are as follows:

[0026] 100. Floating frame device; 200. Net; 300. Net box bottom ring; 110. Inner floating tube; 120. Outer floating tube; 130. Horizontal connecting column; 140. Vertical connecting column; 150. Handrail; 160. Connecting piece; 210. Ultra-high molecular weight polyethylene core wire; 220. Polyoxymethylene skin wire; 310. Sinker. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] Example 1, please refer to Figure 1-3 :

[0029] A gravity-type aquaculture cage comprises a floating frame device 100, a net 200 and a cage bottom ring 300.

[0030] Among them, the floating frame device 100 specifically includes: an inner floating tube 110, an outer floating tube 120, a horizontal connecting column 130, a vertical connecting column 140 and a handrail 150; the inner floating tube 110, the outer floating tube 120 and the handrail 150 are all circular tube bodies extending in the horizontal direction; the inner floating tube 110 is located in the horizontal inner circle of the outer floating tube 120, and the two ends of the column body of the horizontal connecting column 130 are fixedly connected to the inner floating tube 110 and the outer floating tube 120 as a whole through connecting pieces 160; the handrail 150 is located above the horizontal surface of the inner floating tube 110, and the two ends of the column body of the vertical connecting column 140 are fixedly connected to the inner floating tube 110 and the handrail 150 as a whole through connecting pieces 160. In this example: the connecting member 160 is configured as a sleeve for being sleeved on the outside of the tube body of the inner floating tube 110, the outer floating tube 120 and the handrail 150, and the two ends of the column body of the horizontal connecting column 130 and the vertical connecting column 140 are respectively fixedly connected to the outer side wall of the sleeve as a whole.

[0031] The bottom ring 300 of the cage is in a circular shape, and 8 sinkers 310 are evenly distributed on the bottom ring 300 of the cage, and the weight of each sinker 310 is 50 kg. (That is, the overall weight of the sinkers 310 is 400 kg)

[0032] The net 200 is installed between the lower edge of the annular floating frame and the upper edge of the bottom circle 300 of the net box to form the side wall of the net box, and is installed inside the circle of the bottom circle 300 of the net box to form the bottom wall of the net box; the net 200 is woven into a single knot structure in the shape of a diamond mesh by the composite braided wire, and the side length of the mesh is 10-40mm. The composite braided wire is composed of an ultra-high molecular weight polyethylene core wire 210 and a polyoxymethylene sheath wire 220. Among them, the ultra-high molecular weight polyethylene core wire refers to a core wire composed of unbranched linear polyethylene fibers with a molecular weight of more than 1.5 million. The polyoxymethylene sheath wire 220 is wrapped around the outside of the ultra-high molecular weight polyethylene core wire 210. Furthermore, the ultra-high molecular weight polyethylene core wire 210 is made of 10 strands of 1000 dtex ultra-high molecular weight polyethylene fibers twisted together; the polyoxymethylene sheath wire 220 includes 6 strands of polyoxymethylene monofilaments with a diameter of 0.10 mm, and the 6 strands of polyoxymethylene monofilaments are wrapped around the outer side of the ultra-high molecular weight polyethylene core wire 210 by a braiding machine, so that the diameter of the braided wire is controlled in the range of 2-6 mm.

[0033] In practice, the cage may further include accessories such as floats, cables, floating rope frames and frame mooring ropes. The floats, cables, floating rope frames and frame mooring ropes are all common cage peripheral accessories, so they will not be further described in this article.

[0034] The gravity-type aquaculture cage in Example 1 is compared with a gravity-type aquaculture cage of the same specification in the prior art (i.e., Comparative Example 1 in Table 1, whose net 200 is made of conventional PE material), and the experimental data comparison table is shown in Table 1 below:

[0035]

[0036] Table 1

[0037] Based on Table 1 we can see:

[0038] Compared with the gravity-type aquaculture cage in the prior art, the braided wire of the net 200 of the cage obtained in Example 1 of the present invention has a higher density (about 1.42 g / cm 3 ) and high wear resistance, thus reducing the weight of the sinker 310 on the cage (reduced by about half), thereby reducing the difficulty of work for workers when working in the sea. At the same time, the problem of easy breakage caused by high-frequency friction between the net 200 and the floating frame is overcome, and the overall service life of the equipment is improved. The ultra-high molecular weight polyethylene fiber as the core wire ensures that the net 200 has a high strength, so that the net 200 will not be easily displaced and deformed under the external force of the water flow, and then, under the premise of ensuring the breeding space, the design width of the braided wire on the net 200 is reduced (the diameter of the braided wire is reduced by about 1 / 3), thereby expanding the mesh size, thereby further reducing the water resistance of the entire equipment in seawater.

[0039] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A gravity aquaculture cage, characterized in that: include: Floating frame device; A bottom ring of the net box, to which a plurality of sinkers are fixedly connected; A net, wherein the net is installed between the lower edge of the annular floating frame and the upper edge of the bottom circle of the net box to form the side wall of the net box, and is installed inside the circle of the bottom circle of the net box to form the bottom wall of the net box; the net is composed of a composite braided wire, and the composite braided wire includes an ultra-high molecular weight polyethylene core wire and a polyoxymethylene leather wire; the polyoxymethylene leather wire is wrapped around the outside of the ultra-high molecular weight polyethylene core wire.

2. The gravity-type aquaculture cage according to claim 1, characterized in that: The ultra-high molecular weight polyethylene core wire is made by twisting 5-25 strands of 1000dtex ultra-high molecular weight polyethylene fibers; The polyoxymethylene sheath wire comprises 6 strands of polyoxymethylene monofilaments with a diameter of 0.10-0.25 mm, and the 6 strands of polyoxymethylene monofilaments are wound and wrapped around the outer side of the ultra-high molecular weight polyethylene core wire through a braiding machine.

3. The gravity-type aquaculture cage according to claim 2, characterized in that: The net is woven by the composite braided wire into a single knot structure in a diamond mesh shape, and the side length of the mesh is 10-40 mm.

4. The gravity-type aquaculture cage according to claim 3, characterized in that: The floating frame device comprises: an inner floating pipe, an outer floating pipe, a horizontal connecting column, a vertical connecting column and a handrail; The inner floating tube, the outer floating tube and the handrail are all circular tube bodies extending in the horizontal direction; The inner floating tube is located in the horizontal inner circle of the outer floating tube, and the two ends of the column body of the horizontal connecting column are fixedly connected to the inner floating tube and the outer floating tube through connecting pieces respectively. The handrail is located above the level of the inner floating tube, and two ends of the column body of the vertical connecting column are fixedly connected to the inner floating tube and the handrail through connecting pieces.

5. The gravity-type aquaculture cage according to claim 4, characterized in that: The bottom circle of the net box is in a circular shape, and 6 to 12 sinkers are evenly distributed on the bottom circle of the net box, and the weight of the sinkers is 50 to 150 kg.

Images