Lightweight artificial fish reef using biological attachment

Abstract

A light artificial fish reef utilizing biological attachment comprises an L-shaped fish reef body and a netting arranged on the fish reef body, the fish reef body comprises a first body and a second body which are symmetrically arranged, and the netting connects one end of the first body to one end of the second body; according to the light artificial fish reef utilizing organism attachment, the fish reef main body is compounded with the netting by adopting the L-shaped open structure, and the open fish reef frame is stored after being prefabricated and erected, so that the construction site area required in the prefabrication stage is greatly reduced; the netting can be installed before being thrown on a hoisting ship, the installation difficulty is low, the speed is high, and structures such as shell bags can be combined according to different requirements; the symmetrical design of the fish reef main body is loose in installation condition, and compared with other special-shaped fish reefs, the structural design enables the fish reef to be installed only by means of gravity. The light artificial fish reef attached by the organisms is light in weight, small in required prefabrication site and convenient to install, and the performance of the light artificial fish reef is superior to that of a traditional artificial fish reef.

Description

Technical Field

[0001] The invention relates to an artificial fish reef, in particular to a light artificial fish reef utilizing biological attachment. Background Art

[0002] Artificial reefs generally refer to artificial structures placed in target waters to gather fish and other aquatic organisms. Their working principle is to form a suitable habitat for fish based on the tropism of aquatic organisms such as fish and the flow field, bait, and enemy avoidance effects generated after the placement of artificial reefs. Classified by composition materials: steel reefs, stone reefs, concrete reefs, and waste reefs (including reefs made of scrapped ships, discarded tires, and waste building materials). At present, the main structure of artificial reefs is mostly single material, and there are some problems with traditional frame-type artificial reefs. Large artificial reefs have high material consumption and heavy weight. After being deployed on the seabed, they sink seriously due to gravity; traditional closed artificial reefs require a large storage space during the prefabrication stage, which brings inconvenience to the specific implementation; special-shaped artificial reefs have high requirements for installation and require divers to assist in operation. Summary of the invention

[0003] Based on this, it is necessary to provide a lightweight artificial fish reef utilizing biological attachment that effectively improves performance.

[0004] A light artificial fish reef using biological attachment, comprising: an L-shaped fish reef body, and a net arranged on the fish reef body, wherein the fish reef body comprises: a first body and a second body arranged symmetrically, and the net connects one end of the first body to one end of the second body.

[0005] In a preferred embodiment, holes are provided on the first body and the second body.

[0006] In a preferred embodiment, the hollowing includes: a first hole designed relatively to a large hole, and a second hole designed relatively to a small hole.

[0007] In a preferred embodiment, the first hollowing out is a square or rectangular blind hole, the second hollowing out is a circular through hole, and the second hollowing out is disposed in the first hollowing out and a plurality of the second hollowing out are arranged in an array.

[0008] In a preferred embodiment, the first body is connected to the second body, the first body is designed to be gradually thinned from the connecting end connected to the second body to the other free end, and the second body is designed to be gradually thinned from the connecting end connected to the first body to the other free end, and the first hole is arranged on a side of the first body or the second body relatively close to the net.

[0009] In a preferred embodiment, the connection between the first body and the second body is chamfered.

[0010] In a preferred embodiment, the fish reef body is made of reinforced concrete structure.

[0011] In a preferred embodiment, attachment points for installing the netting are provided at the free ends of the first body and the second body; one end of the netting is installed at the attachment point at the free end of the first body, and the other end is installed at the attachment point at the free end of the second body.

[0012] In a preferred embodiment, the attachment points are formed by arranging steel bars, lifting points for reef casting are provided on the first body or the second body, and the netting is a netting with a pore size of 20 mm.

[0013] In a preferred embodiment, one or more of nutrient agents, preservatives, and growth factors are coated on the surface of the fish reef body.

[0014] For the above-mentioned light artificial fish reef using biological attachment, the fish reef body is composed of an L-shaped open structure combined with netting. The open fish reef framework is prefabricated and stored upright, greatly reducing the construction site area required in the prefabrication stage; the netting can be installed before being put on the hoisting ship, with low installation difficulty and high speed, and structures such as shell bags can be combined according to different needs; the symmetrical design of the fish reef body is more lenient for installation conditions. Compared with other special-shaped fish reefs, its structural design enables it to be installed only by relying on gravity. The light artificial fish reef using biological attachment involved in the present invention is light in weight, requires a small prefabrication site, is convenient to install, and has better performance than traditional artificial fish reefs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a light artificial fish reef using biological attachment according to an embodiment of the present invention; Figure 2 It is a partial structural schematic diagram of the fish reef body according to an embodiment of the present invention; Figure 3 It is a partial structural schematic diagram of the fish reef body from another perspective according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figures 1 to 3 shown, the present invention provides a light artificial fish reef 100 using biological attachment, including: an L-shaped fish reef body 20 and a netting 40 arranged on the fish reef body 20. The fish reef body 20 includes: a first body 22 and a second body 24 which are symmetrically arranged. The netting 40 connects one end of the first body 22 to one end of the second body 24.

[0017] Furthermore, in this embodiment, holes are provided on the first body 22 and the second body 24.

[0018] Furthermore, the hollowing out in this embodiment includes: a first hollowing 222 for weight reduction and designed with relatively large holes, and a second hollowing 224 for promoting water circulation and designed with relatively small holes. The large holes and small holes of the present invention are relative. The first hollowing 222 is a large hole design relative to the second hollowing, and the second hollowing 224 is a small hole design relative to the first hollowing 222.

[0019] For better weight reduction, the first hollowing 222 in this embodiment is a square or rectangular blind hole. The first hollowing 222 adopts a square or rectangular hollowing design instead of being completely hollowed out, which can significantly increase the contact area between the fish reef and the seabed, reduce the pressure on the seabed, and reduce the settlement of the fish reef. Preferably, the second hollowing 224 in this embodiment is arranged in 3 rows in the first hollowing 222, with 3 in each row.

[0020] Furthermore, the second hollowing 224 in this embodiment is a circular through hole. The second hollowing 224 is arranged in the first hollowing 222 and there are multiple of them arranged in an array. The circular hollowing design of the second hollowing 224 ensures the water exchange efficiency, provides a swimming channel for small marine organisms, and at the same time, if the ocean current is too large, the circular hollowing design helps to reduce the pressure generated by the ocean current on the upper plate surface of the fish reef and prevent the fish reef from moving.

[0021] Furthermore, the first main body 22 and the second main body 24 in this embodiment are connected to form an L shape. The first main body 22 in this embodiment is designed with a gradually decreasing thickness from the connection end connected to the second main body 24 to the other free end. The second main body 24 in this embodiment is designed with a gradually decreasing thickness from the connection end connected to the first main body 22 to the other free end. The first hollowing 222 is arranged on the front surface of the first main body 22 or the second main body 24, that is, the side relatively close to the netting 40.

[0022] To reduce the local pressure, the connection between the first main body 22 and the second main body 24 in this embodiment is chamfered. The chamfers include: an inner chamfer 226 and an outer chamfer 228.

[0023] Furthermore, the fish reef main body 20 in this embodiment adopts a reinforced concrete structure. Attachment points 225 for installing the netting 40 are provided at the free ends of the first main body 22 and the second main body 24. One end of the netting 40 in this embodiment is installed at the attachment point 225 at the free end of the first main body 22, and the other end is installed at the attachment point 225 at the free end of the second main body 24. Preferably, the attachment points 225 are formed by arranging steel bars.

[0024] Furthermore, to facilitate the placement of the fish reef, reef placement lifting points 223 are provided on the first main body 22 and the second main body 24.

[0025] Furthermore, the surface of the fish reef main body 20 in this embodiment is coated with one or more of a nutrient agent, a preservative, and a growth factor.

[0026] The L-shaped columnar artificial reef body 20 of this embodiment can be installed with fishing nets 40 of different sizes and mesh sizes by the mooring points 225. The mesh size of the fishing net 40 can be comprehensively considered according to factors such as the purpose of deploying artificial reefs and the types of dominant seabed organisms in the local area. Preferably, a fishing net with a 20-mm aperture is set to facilitate the rapid enrichment of common seabed organisms such as barnacles and oysters.

[0027] The framework part of the artificial reef body 20 reserves mooring points 225 for the fishing net 40, and the fishing net 40 can be fixed according to the actual situation. There are various choices for the material of the fishing net 40. A fishing net that is not easily corroded, not easily degraded, and has no biological toxicity can be selected, such as a PET fishing net, to facilitate long-term use and the attachment of seabed organisms.

[0028] The framework material of the artificial reef body 20 can be selected in various ways according to needs. The surface of the artificial reef body 20 can be coated with polymer-based preservatives to extend the service life of the artificial reef, or coated with agents such as nutrients and growth factors to accelerate biological attachment.

[0029] The artificial reef body 20 of the present invention mainly adopts a reinforced concrete structure during manufacturing. The concrete is used to provide the shape of the artificial reef that is easy to gather fish and to provide the compressive strength of the main body, while the steel bars are poured into the concrete to provide tensile strength. The layout design of the internal steel bars of the artificial reef body 20 takes into account the exposed steel bars in advance to manufacture the lifting points 223 and mooring points 225 of the artificial reef. In addition to traditional concrete materials, new materials such as new shell concrete and recycled concrete can also be used, but the material properties should be higher than those of C20-level concrete. The steel bars adopt Q235 materials, and the specific thickness can be adjusted according to the actual seabed conditions. The steel bars of the present invention adopt a radius r5.

[0030] The construction of the artificial reef requires a mold of a corresponding shape. First, according to the actual seabed conditions, a steel bar framework is tied for the artificial reef while leaving a certain safety margin, and then the mold is installed outside the framework. The function of the mold is to restrain the concrete to form the main structure of the artificial reef. When both the mold and the framework are in place, concrete is poured into the mold. After shaping, the mold is removed, and then materials such as nutrients and preservatives are coated on the outer surface of the artificial reef as needed. Finally, the integrity of the entire artificial reef is checked, and the lifting points and mooring points are processed to complete the construction of the artificial reef.

[0031] When the artificial reef is waiting to be deployed on the ship, the fishing net 40 can be installed, and materials such as oyster shells can be placed in the semi-closed space formed by the artificial reef framework and the fishing net 40 to enhance the effect of the artificial reef.

[0032] When the artificial reef 100 is being lowered into the water, it can be fixed by four lifting points 223 and lowered into the water by a crane. Due to the center-of-gravity factor, it descends in a "V" shape in the water. When the artificial reef touches the seabed, its framework will randomly present an "L" shape or an "inverted L" shape due to the center-of-gravity and sea-current factors. Since the artificial reef is a symmetric structure, neither state affects normal use.

[0033] When the fish reef is placed, the main underwater force depends on the outer frame structure containing steel bars, so the amount of internal concrete can be reduced to reduce weight. Therefore, the main board surface is designed with square holes to reduce its settlement on the seabed. At the same time, the first hollowing 222 adopts a square or rectangular hole design instead of a full hollowing, which can significantly increase the contact area between the fish reef and the seabed, reduce the pressure on the seabed, and reduce the settlement of the fish reef. The second hollowing 224 adopts a circular hole design to ensure the exchange efficiency of the water body and provide a swimming channel for small marine organisms. At the same time, if the sea current is too strong, the circular hole design helps to reduce the pressure of the sea current on the upper board surface of the fish reef and prevent the fish reef from moving.

[0034] The design of the holes was based on the experience in engineering construction and the design inspiration of the invention team. After creative work, the square hole + circular hole design concept was determined within the scope of the empirical design. On this basis, several hole digging schemes were selected. Mechanical simulation was carried out through simulation software, mainly simulating the static state, hoisting state, and extreme current impact state. It was found that the structure was mainly subjected to force on the external frame part, and the hole digging layout designed by the invention can significantly reduce the material consumption and save costs without increasing the difficulty of casting.

[0035] When the fish reef is placed on the seabed 1-2 years later, seabed organic matter and marine organisms such as barnacles will be attached to the net. At this time, the net and the biomass together become a similar impermeable structure, providing a food source and better shelter conditions for seabed organisms.

[0036] The light artificial fish reef 100 utilizing biological attachment of the present invention has a fish reef frame that is composited with a net using an L-shaped open structure. The open fish reef frame is prefabricated and stored upright, which greatly reduces the construction site area required in the prefabrication stage. The net system can be installed before being placed on a lifting vessel, which is easy to install and fast, and can be combined with structures such as shell bags according to different needs. The symmetrical design of the fish reef body 20 is more relaxed in terms of installation conditions. Compared with other special-shaped fish reefs, its structural design allows it to be installed only by gravity. The hole-digging design of the fish reef body 20 takes into account the permeability of the upper plate surface and the force-bearing area of ​​the lower plate surface, while reducing the weight and the impact of settlement.

[0037] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A light artificial reef using biological attachment, characterized in that: include: An L-shaped fish reef body and a net arranged on the fish reef body, wherein the fish reef body comprises a first body and a second body arranged symmetrically, and the net connects one end of the first body to one end of the second body.

2. The light artificial reef using biological attachment according to claim 1, characterized in that: The first body and the second body are provided with holes.

3. The light artificial fish reef using biological attachment according to claim 1, characterized in that: The hollowing includes: a first hollowing hole designed relatively to a large hole, and a second hollowing hole designed relatively to a small hole.

4. The light artificial reef using biological attachment according to claim 3, characterized in that: The first hollowing is a square or rectangular blind hole, the second hollowing is a circular through hole, and a plurality of the second hollowings are arranged in an array in the first hollowing.

5. The light artificial fish reef using biological attachment according to claim 3, characterized in that: The first body is connected to the second body. The first body is designed to be gradually thinner from the connecting end connected to the second body to the other free end. The second body is designed to be gradually thinner from the connecting end connected to the first body to the other free end. The first hole is set on a side of the first body or the second body relatively close to the net.

6. The light artificial reef using biological attachment according to claim 1, characterized in that: The connection between the first body and the second body is chamfered.

7. The light artificial reef using biological attachment according to any one of claims 1 to 6, characterized in that: The main body of the fish reef adopts a reinforced concrete structure.

8. The light artificial reef using biological attachment according to claim 7, characterized in that: The free ends of the first body and the second body are provided with tie points for installing the net; one end of the net is installed at the tie point at the free end of the first body, and the other end is installed at the tie point at the free end of the second body.

9. The light artificial fish reef using biological attachment according to claim 8, characterized in that: The tie points are formed by arranging steel bars, a reef-casting hanging point is arranged on the first body or the second body, and the net is a net with an aperture of 20 mm.

10. The light artificial reef using biological attachment according to any one of claims 1 to 6, characterized in that: The surface of the fish reef body is coated with one or more of nutrients, preservatives and growth factors.

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