A gravity type culture net cage

Abstract

A gravity type culture net cage comprises a floating frame device, a net cage bottom ring and a net cover. The net cage bottom ring is fixedly connected with a plurality of sinkers. The net cover is covered and installed between the lower edge of the annular floating frame and the upper edge of the net cage bottom ring to form a net cage side wall, and is covered and installed inside the ring body of the net cage bottom ring to form a net cage bottom wall. The net cover is composed of a composite braided wire, which comprises an ultra-high molecular weight polyethylene core wire and a polyformal skin wire. The polyformal skin wire is wrapped outside the ultra-high molecular weight polyethylene core wire. The present application can reduce the sinker weight to reduce the difficulty of marine construction, and comprehensively improve the volume, load strength and wear resistance of the culture net cage.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, specifically relating to a gravity-fed aquaculture cage. Background Technology

[0002] Cage aquaculture is a common aquaculture technology. Gravity cages are a commonly used type of deep-sea cage aquaculture equipment. Gravity cages mainly consist of a floating frame and a netting system. The netting is the most important component of the cage, primarily used to provide aquaculture space, prevent fish escape, and protect against predators. Existing gravity aquaculture systems have the following problems: First, in practice, the netting bears most of the load from ocean currents on the cage. Therefore, compared to other components, the netting is more prone to displacement and deformation under the influence of water currents, leading to reduced aquaculture space and overcrowding and injury to farmed fish. Second, the netting is subject to continuous friction between the seawater and the frame during use, making it prone to tearing after prolonged use. Furthermore, the netting density in existing gravity aquaculture cages is usually lower than the density of seawater, requiring a large counterweight for the sinkers in practical applications. This large counterweight further increases the difficulty of working at sea. Therefore, developing a new structure for marine aquaculture devices to overcome the above-mentioned problems in existing technologies is a direction that requires further research by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a gravity-fed aquaculture cage that can reduce the weight of the sinker and comprehensively improve the cage volume, load-bearing strength, and wear resistance.

[0004] The technical solution provided by this invention is a gravity-type aquaculture cage, which includes:

[0005] Floating frame assembly;

[0006] The bottom ring of the wire mesh cage has several sinkers fixedly connected to it;

[0007] The netting covers and is installed between the lower edge of the annular float and the upper edge of the bottom ring of the net cage to form the side wall of the net cage, and covers and is installed on the inner side of the bottom ring of the net cage to form the bottom wall of the net cage; the netting is made of composite braided yarn, which includes ultra-high molecular weight polyethylene core yarn and polyoxymethylene sheath yarn; the polyoxymethylene sheath yarn is wrapped around the outside of the ultra-high molecular weight polyethylene core yarn.

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

[0009] Preferably, the mesh is woven from the composite braided yarn into a single dead knot structure with a diamond mesh shape, and the side length of the mesh is 10-40mm.

[0010] Preferably, the floating frame device includes: 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 annular tubes extending in the horizontal direction;

[0012] The inner float tube is located in the horizontal inner circle of the outer float tube, and the two ends of the horizontal connecting column are fixedly connected to the inner float tube and the outer float tube as a whole by connecting parts;

[0013] The handrail is located horizontally above the inner floating tube, and the two ends of the vertical connecting column are fixedly connected to the inner floating tube and the handrail as a whole through connectors.

[0014] Preferably, the bottom ring of the cage is circular, and 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 has a high density (approximately 1.42 g / cm³) when used as a yarn. 3 The high abrasion resistance of the netting ensures sufficient weight, reducing the need for counterweights on the net cages and thus lowering the workload for workers in the sea. It also overcomes the problem of easy breakage caused by high-frequency friction between the netting and the floating frame, extending the overall service life of the equipment. The use of ultra-high molecular weight polyethylene fiber as the core ensures high strength, preventing displacement and deformation under water currents. This allows for a reduction in the width of the braided threads while maintaining sufficient aquaculture space, thereby increasing the mesh size and further reducing water resistance.

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

[0018] First, the present invention can effectively reduce the counterweight of the sinker, thus reducing the difficulty for workers when operating at sea.

[0019] Secondly, the present invention increases the strength of the netting, so that the netting will not easily shift or deform under the action of water flow.

[0020] Thirdly, this invention improves the abrasion resistance of the mesh, 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. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the composite braided yarn in this invention.

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

[0025] The component names corresponding to the various reference numerals in the diagram are as follows:

[0026] 100. Floating frame device; 200. Netting; 300. Bottom ring of the cage; 110. Inner floating pipe; 120. Outer floating pipe; 130. Horizontal connecting column; 140. Vertical connecting column; 150. Handrail; 160. Connector; 210. Ultra-high molecular weight polyethylene core wire; 220. Polyoxymethylene sheath wire; 310. Sinker. Detailed Implementation

[0027] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed 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 includes: a floating frame device 100, a net 200, and a bottom ring 300.

[0030] 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 annular tubes extending horizontally; the inner floating tube 110 is located in the horizontal inner circle of the outer floating tube 120, and the two ends of the horizontal connecting column 130 are fixedly connected to the inner floating tube 110 and the outer floating tube 120 together through connectors 160; the handrail 150 is located horizontally above the inner floating tube 110, and the two ends of the vertical connecting column 140 are fixedly connected to the inner floating tube 110 and the handrail 150 together through connectors 160. In this example: the connector 160 is configured as a sleeve for sleeved on the outside of the inner float tube 110, the outer float tube 120 and the handrail 150, and the two ends of the horizontal connecting post 130 and the vertical connecting post 140 are respectively fixedly connected to the outer side wall of the sleeve.

[0031] The bottom ring 300 of the cage is circular, and eight sinkers 310 are evenly distributed on the bottom ring 300, with each sinker 310 weighing 50 kg. (That is, the total counterweight of the sinkers 310 is 400 kg.)

[0032] The netting 200 covers and is installed between the lower edge of the annular float and the upper edge of the bottom ring 300 of the net cage, forming the side wall of the net cage, and also covers and is installed inside the ring of the bottom ring 300, forming the bottom wall of the net cage. The netting 200 is woven from the composite braided yarn into a diamond-shaped single-knot structure, with the side length of the mesh being 10-40mm. The composite braided yarn is composed of ultra-high molecular weight polyethylene core yarn 210 and polyoxymethylene sheath yarn 220. The ultra-high molecular weight polyethylene core yarn refers to a core yarn composed of unbranched linear polyethylene fibers with a molecular weight of over 1.5 million. The polyoxymethylene sheath yarn 220 is wrapped around the outside of the ultra-high molecular weight polyethylene core yarn 210. Furthermore, the ultra-high molecular weight polyethylene (UHMWPE) core wire 210 is made of 10 strands of 1000 dtex UHMWPE fibers twisted together; the polyoxymethylene (POM) sheath wire 220 includes 6 strands of 0.10 mm diameter POM monofilaments, which are wound and wrapped around the outside of the UHMWPE core wire 210 by a braiding machine. This ensures that the diameter of the braided wire is controlled within the range of 2-6 mm.

[0033] In practice, the cage may also include accessories such as floats, cables, float frames, and mooring ropes. The floats, cables, float frames, and mooring ropes are all common external accessories for cages, so they will not be described in detail in this article.

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

[0035]

[0036] Table 1

[0037] Based on Table 1, we can see that:

[0038] Compared to existing gravity-fed aquaculture cages, the netting 200 of the cage obtained in Embodiment 1 of this invention has a higher density of yarn (approximately 1.42 g / cm³). 3 The high wear resistance of the material reduces the weight of the sinkers 310 on the net cage (by about half), thus lowering the difficulty of work for personnel in the sea. It also overcomes the problem of easy breakage caused by high-frequency friction between the net 200 and the floating frame, extending the overall service life of the equipment. The ultra-high molecular weight polyethylene fiber as the core ensures the high strength of the net 200, preventing displacement and deformation under the influence of water flow. This allows for a reduction in the design width of the braided lines on the net 200 (the diameter of the braided lines is reduced by about 1 / 3) while maintaining sufficient aquaculture space, thereby increasing the mesh size and further reducing the water resistance experienced by the entire equipment in seawater.

[0039] The embodiments of the present invention have been described in detail above with reference to 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 shall still fall within the protection scope of the present invention.

Claims

1. A gravity-fed aquaculture cage, characterized in that, include: Floating frame assembly; The bottom ring of the wire mesh cage has several sinkers fixedly connected to it; The netting covers the area between the lower edge of the floating frame device and the upper edge of the bottom ring of the cage, forming the side wall of the cage, and also covers the inner side of the bottom ring of the cage, forming the bottom wall of the cage. The netting is made of composite braided yarn, which includes ultra-high molecular weight polyethylene core yarn and polyoxymethylene sheath yarn. The polyoxymethylene sheath yarn is wrapped around the outside of the ultra-high molecular weight polyethylene core yarn. The ultra-high molecular weight polyethylene core wire is made of 10 strands of 1000 dtex ultra-high molecular weight polyethylene fiber twisted together. The polyoxymethylene (POM) yarn comprises six strands of POM monofilaments with a diameter of 0.10 mm. The six strands of POM monofilaments are wound and wrapped around the outside of the ultra-high molecular weight polyethylene (UHMWPE) core yarn by a braiding machine, so that the diameter of the braided yarn is controlled within the range of 2-6 mm. The mesh is woven from the composite braided yarn into a single dead knot structure with a diamond mesh shape, and the side length of the mesh is 10-40mm.

2. The gravity-fed aquaculture cage according to claim 1, characterized in that, The floating frame assembly includes: an inner floating tube, an outer floating tube, a horizontal connecting column, a vertical connecting column, and a handrail; The inner floating tube, the outer floating tube, and the handrail are all annular tubes extending in the horizontal direction; The inner float tube is located in the horizontal inner circle of the outer float tube, and the two ends of the horizontal connecting column are fixedly connected to the inner float tube and the outer float tube as a whole by connecting parts; The handrail is located horizontally above the inner floating tube, and the two ends of the vertical connecting column are fixedly connected to the inner floating tube and the handrail as a whole through connectors.

3. The gravity-fed aquaculture cage according to claim 2, characterized in that, The bottom ring of the cage is circular, and 6-12 sinkers are evenly distributed on the bottom ring, with each sinker weighing 50-150 kg.

Images