Multi-layer self-amplification type oyster proliferation ecological reef

Abstract

The utility model discloses a multi-layer self-amplification type oyster proliferation ecological reef. The multi-layer self-amplification type oyster proliferation ecological reef comprises a reef body base, a bottom end frame, a top end frame, attachment stand columns and oyster proliferation cages. A bottom end frame is fixed on a reef body base, the bottom end frame and a top end frame are connected and supported by a plurality of attachment stand columns, a plurality of oyster proliferation cages are evenly hung between the bottom end frame and the top end frame, the tops of the oyster proliferation cages are connected with the top end frame, and balance weight facilities are installed at the bottoms of the oyster proliferation cages. The oyster proliferation cages and the attachment stand columns are in a parallel state in the space between the bottom end frame and the top end frame. The multi-layer self-amplification type oyster proliferation ecological reef can be stably arranged in a sea area with an offshore sediment substrate of an estuary, the problems that the reef body is prone to sinking, small in organism attachment surface, low in attachment efficiency and the like are solved through the reef body hanging oyster parents and the multi-layer structural design, and finally the oyster self-amplification type oyster proliferation ecological reef is formed.

Description

Technical Field

[0001] This utility model relates to the field of marine ecological restoration technology, and in particular to a multi-layered self-amplifying oyster propagation ecological reef. Background Technology

[0002] With the rapid development of human society, marine ecological environments and biological resources are gradually being damaged. By deploying artificial reefs with different functional attributes, the marine ecological environment can be effectively improved and fishery biological resources can be conserved. Oyster reefs are a common habitat type in natural ecosystems, widely distributed in estuaries, bays, and other areas. Thanks to the filter-feeding and attached growth habits of oysters, oyster reefs are widely recognized for their ecological functions, including water purification, biological deposition, wave protection, carbon sequestration, and biological conservation. Currently, some practical applications have been carried out for artificial oyster reefs. For example, CN221011500U provides a suspended cage-like oyster propagation reef with a cover, which can increase the oyster attachment space and reef attachment morphology; CN220123719U provides a cone-shaped hollow oyster reef with embedded seaweed seedlings, which can provide primary food for the attached oyster population; CN117694290A provides an oyster reef device for marine bare beach restoration; and CN116965364A provides a triangular oyster reef formed by concrete casting. Existing technologies have played a certain role in oyster reef restoration, but most reefs are suitable for areas with hard seabeds and are not applicable to silty estuaries. Moreover, the ease of assembly, economy, environmental friendliness of materials, and biocompatibility of reef devices still need further optimization and improvement.

[0003] Meanwhile, with the continuous increase in the production of farmed oysters, more than 10 million tons of waste oyster shells are discarded as solid waste every year. Waste oyster shells are difficult to degrade under natural conditions, and the accumulation of large amounts of waste oyster shells has a certain impact on the environment. However, relevant studies have shown that oyster shells have good adsorption properties for heavy metals such as Cu, Zn, and Pb in water bodies. Reefs with added shell powder have better biocompatibility with attached organisms such as bivalve mollusks and algae. Developing and utilizing waste oyster shells can achieve the goal of "treating waste with waste", achieving a double harvest of economic and ecological benefits, and injecting strong impetus into sustainable development. Utility Model Content

[0004] This invention addresses the current environmental characteristics of fragmented fishery habitats, continuous degradation of natural oyster reefs, and the tendency of siltation in nearshore estuarine sedimentary waters. It proposes a multi-layered, self-expanding oyster propagation ecological reef with a simple structure, modular assembly, environmentally friendly materials, and suitability for sedimentary sedimentary bottoms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-layered self-expanding oyster propagation reef includes a reef base composed of multiple reef units connected together. Each reef unit has a hollow bottom and multiple through holes at its top. A bottom frame includes multiple longitudinal plates and connecting plates, each with multiple through holes. The longitudinal plates correspond one-to-one with each of the reef units and are fixedly connected via the through holes. The connecting plates connect the longitudinal plates and reef units into a single unit. A top frame includes an outer frame and reinforcing ribs. The outer frame has the same dimensions as the bottom frame, and the reinforcing ribs are located inside the outer frame. The outer frame and reinforcing ribs also have multiple through holes. Multiple attachment columns are attached to the bottom frame and the top frame respectively, with their ends connected via through holes. Oyster propagation cages are suspended on the top frame and positioned between the attachment columns. The reef units and attachment columns are formed by casting and demolding a mixture of concrete and oyster shell particles.

[0007] Preferably, the cross-section of the reef unit is an isosceles trapezoid.

[0008] Preferably, the bottom frame and the top frame are made of metal.

[0009] Preferably, the metal material of the bottom frame and the top frame is covered with a layer of concrete or a mixture of concrete and oyster shell particles.

[0010] Preferably, the outer frame of the top frame is shaped like a grid, and the reinforcing ribs are rhomboid within the outer frame.

[0011] Preferably, the attachment columns are cross-shaped, and multiple attachment columns are evenly distributed on the four sides and in the middle area of ​​the bottom frame and the top frame.

[0012] Preferably, the oyster breeding cage includes a net, a mesh tray arranged in layers inside the net, and a counterweight device disposed at the bottom of the net.

[0013] Preferably, the oyster breeding cage is connected to the reinforcing ribs of the top frame via bolts at the top of the mesh.

[0014] The advantages of this utility model are: the multi-layered self-proliferating oyster breeding ecological reef disclosed in this utility model can be stably deployed in the nearshore muddy and sandy seabed of estuaries. By suspending oyster parents on the reef and using a multi-layered structural design, it solves the problems of easy reef sinking, few biological attachment surfaces, and low attachment efficiency, and finally forms an oyster self-proliferating ecological breeding reef. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the reef base structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the bottom frame structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the top frame structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the column structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the oyster propagation cage of this utility model.

[0021] Meaning of the reference numerals in the diagram:

[0022] 1-Reef base, 101-Reef unit, 2-Bottom frame, 201-Longitudinal plate, 202-Connecting plate, 3-Through hole, 4-Top frame, 401-Reinforcing rib, 402-Outer frame; 5-Attached column, 501-Reinforcing bar, 6-Oyster breeding cage, 601-Counterweight device, 602-Net tray, 603-Bolt clip, 604-Network. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Combination Figures 1 to 6 As shown, this utility model discloses a multi-layered self-expanding oyster propagation ecological reef, comprising five parts: a reef base 1, a bottom frame 2, a top frame 4, attached posts 5, and oyster propagation cages 6. The reef base 1 is composed of multiple reef units 101 connected together. Each reef unit 101 has a hollow bottom and multiple through holes 3 at its top. Figure 2As shown, in a preferred embodiment, the reef base 1 is composed of multiple reef units 101 with isosceles trapezoidal cross sections arranged side by side. The hollow trapezoidal structure has its trapezoidal opening facing downwards and is embedded in mud and sand, which can increase the contact area between the reef and the seabed to reduce pressure and prevent sinking. The inclined side support of each hollow trapezoid also increases the supporting force of the reef and prevents the reef from sliding sideways. The "V"-shaped through-hole channel formed between the two trapezoids can create a habitat for benthic organisms in the sea area.

[0026] like Figure 3 As shown, the bottom frame 2 includes multiple longitudinal plates 201 and connecting plates 202. Multiple through holes 3 are provided on the longitudinal plates 201 and connecting plates 202. Each longitudinal plate 201 corresponds one-to-one with a multiple reef unit 101 and is fixedly connected through the through holes 3. The connecting plates 202 connect the multiple longitudinal plates 201 and the reef units 101 into a single unit. The function of the bottom frame 2 is to fix each reef unit 101 of the reef base 1, and the two are fixed together with bolts through pre-reserved through holes.

[0027] like Figure 4 As shown, the top frame 4 includes an outer frame 402 and reinforcing ribs 401. The outer frame 402 has the same dimensions as the bottom frame 1. The reinforcing ribs 401 are located inside the outer frame 402, and multiple through holes are provided on the outer frame 402 and the reinforcing ribs 401. In a preferred embodiment, the outer frame 402 of the top frame 2 is shaped like a grid, and the reinforcing ribs 401 are rhomboid within the outer frame 402. The rhomboid structure serves to strengthen the top frame 4 and provide support for suspending the oyster breeding cage 6. The midpoint of each side of the rhomboid structure is the suspension point of the oyster breeding cage 6.

[0028] like Figure 5As shown, there are multiple attachment posts 5, with both ends of each post 5 connected to the bottom frame 2 and the top frame 4 respectively through through holes. The height of the attachment posts 5 determines the vertical distance between the bottom frame 2 and the top frame 4. This distance determines the specifications of the oyster breeding cage. Oyster breeding cages 6 are suspended in the area between the top frame 4 and the bottom frame 2. Male and female oyster parents are placed inside the oyster breeding cages 6. During the breeding season after they reach sexual maturity, the oyster parents can produce oyster larvae, which continuously spread and attach to the surrounding attachment posts. In a preferred embodiment, the attachment posts 5 are cross-shaped, with multiple posts 5 evenly distributed along the four sides and the middle area of ​​the bottom frame 2 and the top frame 4. The spacing between the cross-shaped attachment posts 5 on the four sides is 150mm, and the spacing between the cross-shaped attachment posts 5 in the middle area of ​​the frame is 300mm. This ensures sufficient gaps within the reef for smooth seawater flow, allowing seawater to penetrate the reef and enabling full water circulation within the reef. This provides ample nutrition and dissolved oxygen for the oysters in the oyster breeding cages and other organisms within the reef. Simultaneously, the numerous cross-shaped attachment posts 5 provide a complex habitat for juvenile fish, thus helping them avoid predators.

[0029] Both the reef unit 101 and the attachment column 5 are precast from a mixture of corrosion-resistant concrete and oyster shell particles. The preferred material composition is a mixture of corrosion-resistant concrete and 4mm oyster shell particles, with the 4mm oyster shell particles comprising 40% of the mixture. This composition provides ease of processing and assembly, corrosion resistance, and environmental friendliness. Specifically, during casting, a reinforcing bar 501 is pre-installed at the center of the cross-shaped mold. The height of the reinforcing bar 501 is greater than the height of the cross-shaped mold, and reinforcing bars 501 protrude from both the top and bottom ends of the mold. This ensures that the cross-shaped attachment surface formed by the concrete and oyster shell particle mixture solidifies only in the middle of the reinforcing bar 501. The exposed reinforcing bars 501 at the top and bottom ends are welded to the bottom frame 2 and the top frame 4, respectively. The inclusion of crushed oyster shells in the attachment column enhances adhesion affinity and facilitates biological attachment.

[0030] In a preferred embodiment, both the bottom frame 2 and the top frame 4 are welded from metal. Using metal facilitates welding and assembly. Furthermore, to enhance the corrosion resistance of the bottom frame 2 and the top frame 4, concrete or a mixture of concrete and oyster shell particles can be wrapped around the metal. The concrete isolates the metal from seawater, reducing the impact of seawater corrosion, while the oyster shell particles allow surrounding organisms to attach and grow on the bottom frame 2 and the top frame 4.

[0031] like Figure 6As shown, the oyster breeding cage 6 is suspended on the top frame 4, located between the multiple attached posts 5. Specifically, the oyster breeding cage 6 includes a net 604, layered mesh trays 602 inside the net 604, and a counterweight device 603 at the bottom of the net 604. The oyster breeding cage 6 is made of basalt fiber, which has advantages such as being environmentally friendly, tough, and corrosion-resistant. Each layer of mesh tray 602 holds oyster parents. The bottom of the oyster breeding cage 6 is a counterweight device 601, which is a cast iron ring fitted into the bottom of the oyster breeding cage 6. The counterweight device keeps the breeding cage in a relaxed, vertical position. The oyster breeding cage 6 is connected to the center of the reinforcing ribs 401 of the top frame 4 by bolts and clips 603. In a preferred embodiment, the diameter of the oyster breeding cage 6 is one-third of the side length of the top frame 4. Each layer of the oyster breeding cage 6 has a 15mm mesh size for the net tray 602 supporting the oysters and a 40mm mesh size for the netting 604. The spacing between each layer of net tray 602 is 280mm. Sufficient growth space and mesh size will facilitate the growth and development of the oyster parent oysters. Oyster larvae, after parent oyster reproduction, will leave the oyster breeding cage 6 with the water flow and attach to surrounding substrates for growth. The selection of oyster parent oysters should prioritize local oyster varieties from the breeding area to reduce ecological risks such as biological invasion. The oyster parent oysters should be mature oysters over one year old from natural populations in the breeding area or from the original breeding farm, with a shell height of over 10cm, normal body shape, no external damage, full gonads, and good vitality. The autonomous propagation of this invention mainly relies on the oyster parent stock placed in the net cage. The offspring oysters bred by the oyster parent stock can attach to the surface of the reef, so that the reef can autonomously reproduce, attach, and repair the oyster population without relying on the oyster population in the natural sea area.

[0032] When assembling the multi-layered self-expanding oyster breeding reef of this utility model, a bottom frame 2 is fixed on the reef base 1. The bottom frame 2 and the top frame 4 are connected and supported by multiple attached columns 5. Multiple oyster breeding cages 6 are evenly suspended between the bottom frame 2 and the top frame 4. The top of the oyster breeding cage 6 is connected to the top frame 4, and the bottom of the oyster breeding cage 6 is equipped with a counterweight. Each oyster breeding cage 6 and the attached columns 5 are parallel in the space between the bottom frame 2 and the top frame 4. This utility model adopts mold casting and layered assembly, which is more convenient and faster in terms of manufacturing process and can be modularly mass-produced. The multi-layered, three-dimensional structure enhances the heterogeneity of the reef space, providing shelter for juvenile fish and other marine life, and is more conducive to the recovery of marine fishery resources. The use of a mixture of oyster shell particles and concrete promotes the utilization of discarded oyster shells, improves the reef's biocompatibility, and is more conducive to the attachment of oysters, algae, and other organisms. The large-scale attachment of algae can provide basic food for oysters, herbivorous fish, and other marine organisms, further enhancing the conservation of biological resources in the reef and improving marine biodiversity.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A multi-layer self-amplifying oyster breeding ecological reef, characterized in that, include: A reef base, which is composed of multiple reef units connected together. Each reef unit has a hollow bottom and multiple through holes at the top. The bottom frame includes multiple longitudinal plates and connecting plates. Multiple through holes are provided on the longitudinal plates and connecting plates. The multiple longitudinal plates correspond one-to-one with the multiple reef units and are fixedly connected through the through holes. The connecting plates connect the multiple longitudinal plates and reef units into one unit. The top frame includes an outer frame and a reinforcing rib. The outer frame has the same dimensions as the bottom frame. The reinforcing rib is located inside the outer frame. The outer frame and the reinforcing rib are provided with multiple through holes. Multiple attachment columns, with both ends of each attachment column connected to the bottom frame and the top frame respectively through through holes; Oyster breeding cage, which is suspended on the top frame and located between the multiple attached columns; The reef unit and the attached pillar are formed by casting and demolding a mixture of concrete and oyster shell particles.

2. The multi-layer self-amplification type oyster propagation ecological reef according to claim 1, characterized in that, The cross-section of the reef unit is an isosceles trapezoid.

3. The multi-layer self-amplification type oyster ecological reef according to claim 1, characterized in that, The bottom frame and the top frame are welded together from metal.

4. The multi-layer self-amplification type oyster ecological reef according to claim 1, characterized in that, The metal material of the bottom frame and the top frame is covered with a layer of concrete or a mixture of concrete and oyster shell particles.

5. The multi-layer self-amplification type oyster propagation ecological reef according to claim 1, characterized in that, The outer frame of the top frame is shaped like a grid, and the reinforcing ribs are rhomboid inside the outer frame.

6. The multi-layer self-amplification type Crassostrea gigas propagation ecological reef according to claim 1, characterized in that, The attachment columns are cross-shaped, and multiple attachment columns are evenly distributed on the four sides and in the middle area of ​​the bottom frame and the top frame.

7. The multi-layer self-amplification type Crassostrea gigas propagation ecological reef according to claim 1, characterized in that, The oyster breeding cage includes a net, a mesh tray arranged in layers inside the net, and a counterweight device located at the bottom of the net.

8. A multi-layered self-amplifying oyster reef according to claim 7, characterized in that, The oyster breeding cage is connected to the reinforcing ribs of the top frame via bolts and clips at the top of the mesh.

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