Surrounding net protection device for external mangrove cleaning area

Abstract

The utility model discloses a surrounding net protection device for an external mangrove cleaning area. The surrounding net protection device comprises a wave dissipation plate, a guide rod, a sliding rod, a connecting transverse rod, a blocking net, a blocking piece, a longitudinal mounting rod, a cage body and a floating body. The blocking net adopts a lagging type floating design, so that floating garbage can be blocked outside the blocking net all the time and is not influenced by rising and falling tide; after flood tide, the lower portion of the blocking net provides a passage for organisms, after ebb tide, the device does not affect passage of benthonic animals, and ecological restoration of a cleaning area is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of mangrove restoration technology, specifically relating to a fencing protection device for areas where invasive mangroves are cleared. Background Technology

[0002] Exotic mangroves such as *Lagerstroemia indica* grow rapidly and reproduce quickly, naturally spreading and invading native mangrove communities. They compete with native mangroves for sunlight, nutrients, and habitat, leading to the degradation and even local extinction of native species, disrupting the original succession rhythm of mangrove communities, inhibiting seedling regeneration, and accelerating the homogenization of mangrove ecosystems. Clearing invasive mangrove species from core mangrove areas and increasing the coverage area of ​​native mangroves is crucial for optimizing the structure and function of mangrove ecosystems. As an intertidal ecosystem, the biodiversity of mangroves depends on tidal flow and the freedom of species migration. In invasive mangrove clearing and restoration projects, it is necessary to set up perimeter fencing around the clearing area to intercept marine debris and algae. For example, the fencing disclosed in the "Mangrove Wetland Ecological Restoration Code" (DB46 / T573-2022) is supported by cement pillars or bamboo / wooden stakes, with old fishing nets used between the stakes. However, such fixed netting, being completely enclosed, hinders the migration of fish and benthic organisms, leading to habitat fragmentation and impacting food chain structure and ecosystem services, as well as the reconstruction and restoration of native mangroves. If the bottom of the netting is not installed to serve as a biological passage, garbage can pass through the bottom of the netting as the tides rise and fall, rendering the barrier ineffective.

[0003] Therefore, it is essential to develop a protective fencing device for mangrove cleanup areas that can both block floating debris and provide passageways for organisms. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a protective netting device for mangrove clearing areas, which aims to ensure that floating garbage is blocked outside the netting during high and low tides, while providing passage for biological migration, thus contributing to the restoration of the mangrove ecosystem.

[0005] The purpose of this utility model is achieved as follows: It includes a wave-damping plate, guide rods, sliding rods, connecting crossbars, a barrier net, baffles, longitudinal mounting rods, a cage, and a float. The wave-damping plate has guide rods fixed to its side, with longitudinal grooves on the guide rods. The barrier net has sliding rods fixed to both sides, one sliding rod corresponding to one guide rod, and the sliding rods and grooves slide vertically together. The barrier net is connected to connecting crossbars on its upper and lower sides, with the ends of the connecting crossbars fixed to the corresponding sliding rods. The connecting crossbars can be made of a material with a certain degree of toughness. Below the connecting crossbars located below the barrier net, several equally spaced baffles are fixed along the length of the connecting crossbars. There are two rows of baffles with spacing, and the two rows of baffles are staggered, forming a channel for benthic organisms. The longitudinal mounting rods are fixed to the connecting crossbars and are located on the back of the barrier net. The cage is fixed to the longitudinal mounting rods, and the float is located inside the cage, with the height of the float being less than the height of the cage.

[0006] Among them, wave-dissipating plates are wave-dissipating facilities well known to those skilled in the art, such as wave-dissipating fences, which have neatly arranged long strip grooves. This structure can reduce the impact of waves. Specifically, a support structure can also be set on the back of the wave-dissipating plate to enhance its stability.

[0007] The sliding connection structure between the slide rod and the guide rod is a common connection structure. To prevent slippage, common anti-slip structures in this field can be used. For example, the slide groove can be a T-shaped slide groove, the side of the slide rod can be an I-shaped structure, and the upper and lower ends of the slide groove can be sealed. To improve strength, the slide rod and the guide rod can be made of stainless steel.

[0008] To adjust buoyancy, an appropriate amount of counterweight can be placed at the bottom of the float.

[0009] Preferably, the wave-damping plate and the bottom of the guide rod are both provided with conical fixing feet; the conical fixing feet are inserted into the ground.

[0010] Preferably, the connecting crossbar located below the barrier net extends rearward to form an extension, wherein a row of baffles is fixed at the bottom of the extension; the extension and the connecting crossbar can be integrally formed, and the extension allows the connecting crossbar to extend rearward to form a larger biological passage.

[0011] Preferably, the baffle is semi-circular with its arc edge facing downwards.

[0012] Preferably, each cage corresponds to at least two longitudinal mounting rods.

[0013] Preferably, the cage is cylindrical.

[0014] Preferably, the float is cylindrical.

[0015] Preferably, the height of the float is half the height of the cage, allowing the float more room to move up and down.

[0016] The beneficial effects of this utility model are as follows: The barrier net of this utility model adopts a delayed floating design, which can always block floating garbage outside the barrier net and is not affected by the rise and fall of tides; after the tide rises, the lower part of the barrier net provides a passage for organisms, and after the tide falls, this device does not affect the passage of benthic animals, which is conducive to the ecological restoration of the cleanup area. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a side view of the cage structure.

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the barrier net after it has been lowered into its operational state.

[0020] In the diagram: 1-wave damping plate, 2-guide rod, 3-sliding rod, 4-connecting crossbar, 5-barrier net, 6-baffle plate, 7-longitudinal mounting rod, 8-cage body, 9-buoy, 10-slide groove, 11-extension section. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this does not limit the present invention in any way. Any changes or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0022] Example 1

[0023] As attached Figures 1-3As shown, the protective netting device for the mangrove clearing area in this embodiment includes a wave-dissipating plate 1, a guide rod 2, a sliding rod 3, a connecting crossbar 4, a barrier net 5, a baffle plate 6, a longitudinal mounting rod 7, a cage 8, and a float 9. The wave-dissipating plate 1 is made of C30 precast reinforced concrete wave-dissipating fence plate, with Φ20mm anchoring steel bars at the bottom. During installation, the anchoring steel bars need to be vertically inserted into the mudflat silt layer during low tide, and the appropriate burial depth is set according to the geological conditions of the mudflat. The side of the wave-dissipating plate 1 is fixed to the guide rod 2 with bolts. The guide rod 2 has a longitudinal groove 10. The two sides of the barrier net 5 are respectively tied to the mounting rings set on the sliding rod 3. The barrier net 5 is made of high-density polyethylene with a mesh size of 20mm and a wire diameter of 3mm. The barrier net 5 consists of a sliding rod 3 corresponding to a guide rod 2, with the sliding rod 3 and the sliding groove 10 sliding vertically together. The upper and lower sides of the barrier net 5 are respectively bound to the mounting rings on the connecting crossbar 4, and the ends of the connecting crossbar 4 are fixedly connected to the corresponding sliding rod 3. Below the connecting crossbar 4 located below the barrier net 5, several equally spaced baffles 6 are fixed along the length of the connecting crossbar 4. There are two rows of baffles 6 with spacing, and the two rows of baffles 6 are staggered, forming a channel for benthic organisms. A longitudinal mounting rod 7 is fixedly connected to the connecting crossbar 4 and is located on the back of the barrier net 5. A cage body 8 is fixed to the longitudinal mounting rod 7, and a float 9 is placed inside the cage body 8. The cage body 8 is Φ200mm. HDPE cylindrical cage; float 9 is a Φ180mm foamed polyethylene float, the height of float 9 is less than the height of cage 8, the specific height is set according to the local average high tide level and the buoyancy of the float is calibrated, and it floats up to the barrier net 5 with a lag of at least 10cm; the bottom of the wave-damping plate 1 and the guide rod 2 are equipped with conical fixing feet; the conical fixing feet are inserted into the ground; the rear of the connecting crossbar 4 located below the barrier net 5 extends backward to form an extension 11, in which a row of baffles 6 are fixed at the bottom of the extension 11; the extension 11 and the connecting crossbar 4 can be integrally formed, and the extension allows the connecting crossbar to extend backward in order to form a larger biological channel; the baffles 6 are semi-circular with the arc edge facing down; one cage 8 corresponds to two longitudinal mounting rods 7.

[0024] The working principle and process of this utility model are as follows: The device is deployed at the boundary of the mangrove removal area. During the deployment process, common support structures can be set up to enhance the stability of the device. The device can be deployed along the boundary of the removal area, and the length of the barrier net 5 of a single device is controlled between 1 and 2 meters. When the tide rises, the water level rises, the float 9 floats to the top of the cage 8, and drives the barrier net 5 to float. During this period, the slide rod 3 slides up the slide groove 10 of the guide rod 2. Floating garbage is blocked by the barrier net 5 to prevent it from entering the removal area, while the biological passage below the barrier net 5 does not affect the normal passage of organisms. After the tide recedes, the barrier net 5 descends, and the benthic biological passage between the baffles 6 is used for the passage of benthic organisms. When the tide rises, the float 9 rises first, and the floating garbage floats with the rising water level. After the garbage rises to a certain height, the barrier net 5 will only rise after the float 9 rises to the top of the cage 8. This delayed rising can prevent floating garbage from entering the removal area from the bottom of the barrier net 5, ensuring that the garbage is always blocked outside the barrier net 5.

Claims

1. A protective fencing device for a mangrove clearing area, comprising a wave-damping plate (1), a guide rod (2), a sliding rod (3), a connecting crossbar (4), a barrier net (5), a baffle plate (6), a longitudinal mounting rod (7), a cage (8), and a float (9), characterized in that... The wave-damping plate (1) is fixedly provided with a guide rod (2) on its side. The guide rod (2) has a longitudinal groove (10) on its body. The barrier net (5) is fixedly provided with sliding rods (3) on both sides respectively. One sliding rod (3) corresponds to one guide rod (2), and the sliding rod (3) and the groove (10) slide together vertically. The barrier net (5) is connected to the connecting crossbar (4) on its upper and lower sides respectively. The end of the connecting crossbar (4) is fixedly connected to the corresponding sliding rod (3). The lower edge of the connecting crossbar (4) located below the barrier net (5) is... A number of equally spaced baffles (6) are fixed along the length of the connecting crossbar (4). There are two rows of baffles (6) with a gap between them. The two rows of baffles (6) are staggered and form a channel for benthic organisms between the baffles (6). The longitudinal mounting rod (7) is fixed to the connecting crossbar (4) and is located on the back of the barrier net (5). The cage (8) is fixed on the longitudinal mounting rod (7). The float (9) is located inside the cage (8) and the height of the float (9) is less than the height of the cage (8).

2. The fencing protection device for the invasive mangrove clearing area according to claim 1, characterized in that... The wave-damping plate (1) and the guide rod (2) are both provided with tapered fixing feet at the bottom.

3. The fencing protection device for the invasive mangrove clearing area according to claim 1, characterized in that... The connecting crossbar (4) located below the barrier net (5) extends backward to form an extension (11), in which a row of baffles (6) is fixed at the bottom of the extension (11).

4. The fencing protection device for the invasive mangrove clearing area according to claim 1 or 3, characterized in that... The baffle (6) is semi-circular with its arc edge facing downwards.

5. The fencing protection device for the invasive mangrove clearing area according to claim 1, characterized in that... One cage (8) corresponds to at least two longitudinal mounting rods (7).

6. The fencing protection device for the invasive mangrove clearing area according to claim 1 or 5, characterized in that... The cage (8) is cylindrical.

7. The fencing protection device for the invasive mangrove clearing area according to claim 1, characterized in that... The floating body (9) is cylindrical.

8. The fencing protection device for the invasive mangrove clearing area according to claim 1, characterized in that... The height of the float (9) is half the height of the cage (8).

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