A mangrove protection device that uses crab farming to improve ecology

Abstract

The present invention relates to a mangrove protection device for improving the ecology by cultivating crabs. The device comprises a crab cage, a shelter tube, and an artificial crab cave. One end of the shelter tube is connected to the crab cage. The artificial crab cave is detachably sleeved on the outer side of the shelter tube. The artificial crab cave is provided with a fixed bracket and an openable and closable bait cavity. The fixed bracket comprises a pair of movable support plates. The support plates comprise a plurality of movable blocks and a connecting rope, which is sequentially passed through the plurality of movable blocks for connection. The support plates are further provided with an adjusting knob connected to the connecting rope. The device achieves the goal of attracting cultured crabs into the artificial crab cave for safe trapping. The artificial crab cave can be placed under the aerial roots of mangrove plants and protected by the aerial roots. The support plates are twisted to pass through the gaps in the aerial roots to fix the artificial crab cave, thereby preventing the artificial crab cave from being dug out by natural enemies, improving the survival rate of released crabs, and facilitating an increase in the density of crab holes in the mangrove forest and improving the ecology of the mangrove forest.

Description

Technical Field

[0001] The invention belongs to the technical field of mangrove protection, and in particular relates to a mangrove protection device for improving ecology by cultivating crabs. Background Art

[0002] Mangroves play a vital role in purifying seawater, preventing wind and waves, sequestering carbon, and maintaining biodiversity. Known as the "guardians of the coast" and the "green lungs of the ocean," they serve as a crucial habitat for rare and endangered waterfowl and a breeding ground for fish, shrimp, crabs, and shellfish. Crabs dig burrows, improving the mangrove environment, and preying on the pest water lice, protecting the normal growth of mangrove plants. However, natural factors such as typhoons and extreme temperatures, combined with human factors such as mangrove fishing and pollutant emissions, have damaged mangrove biomes, including crab numbers and the density of crab burrows. Consequently, artificial breeding and release of crabs are necessary to increase crab populations within mangroves and restore the density of crab burrows across the mangroves to protect the mangrove ecosystem. The invention patent with the patent number "201711008358.9" and the name "Combined plank road blue crab breeding device" discloses a technical solution, which consists of a combination box, a shelter pipe, a cover plate, a water pipe, and a bottom row trough. The combination box is divided into multiple management rooms by partitions; the top of the combination box is open and covered by a cover plate, and exchange holes are distributed around the combination box, on the bottom surface and on the partition; the lower part of the side of the management room is provided with a connecting hole, and the management room is connected to the shelter pipe through the connecting hole; the upper part of the side of the combination box and the upper part of the partition are provided with water pipe holes, and the water pipe crosses each management room in the combination box; it can provide a growth environment closer to nature for the growth of crabs, improve the survival rate of crabs, and one crab in one room can prevent crabs from escaping and killing each other and facilitate the capture of finished breeding products. Although the existing technical solution uses a one-room-one-crab design to improve the convenience of catching crabs, due to the strong aggressiveness of crabs, there is still a risk of being pinched when catching crabs in the management room; and after the farmed crabs are released, the crabs are prone to stress reactions due to large changes in the environment, resulting in the death of the released crabs; at the same time, the released crabs in a stressed state cannot dig crab holes to protect themselves in a short period of time, resulting in predation by natural enemies, further reducing the survival rate of the released crabs, slowing the recovery of the crab population, and poorly improving the protection of the mangrove environment.

[0003] Therefore, designing a mangrove protection device that can prevent crabs from being attacked and improve the survival rate of crabs after being released and utilizes crab farming to improve the ecology has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a mangrove protection device which utilizes cultured crabs to improve the ecology.

[0005] The technical solution of the present invention is a mangrove protection device for improving the ecology by breeding crabs, comprising a crab cage, a shelter pipe and an artificial crab cave. The crab cage is connected to a water supply pipe, and the water supply pipe is provided with a sprinkler head. The shelter pipe and the artificial crab cave are both cylindrical structures. One end of the shelter pipe is provided with an inlet and outlet connected to the side of the crab cage, and the other end is provided with a separation port. The artificial crab cave is detachably mounted on the outside of the shelter pipe. The artificial crab cave is provided with a fixed bracket and an openable and closable bait cavity, and the position of the bait cavity corresponds to the separation port; the fixed bracket includes a vertical flip seat, a horizontal rotating seat and a pair of support plates that are hinged to each other, and the support plate includes a plurality of movable blocks and a connecting rope, which is connected by passing through the plurality of movable blocks in sequence; the support plate is also connected to a rotatable adjustment knob, one end of the connecting rope is wrapped around the adjustment knob, and the other end is provided with a tightening knot.

[0006] After adopting the above method, crabs are individually cultured in crab cages, and the shelter tube simulates the crab hole environment for the crabs' daily living and living. The sprinkler head of the water supply pipe sprays water into the crab cage to prevent the environment from drying out and causing the crabs to die. Bait for luring crabs is placed in the bait cavity to attract the crabs to pass through the shelter tube and enter the artificial crab cave outside the shelter tube. The artificial crab cave is pulled out to the end where the separation port is located and separated from the shelter tube. The crabs remain in the artificial crab cave, and the artificial crab cave is used to load and transport the crabs to avoid being pinched by the crabs. and the safety of the operators. By separating the artificial crab nest from the shelter tube, the artificial crab nest replaces the natural crab hole for the released crabs to live in, and part of the breeding environment is brought to the wild for placement, which reduces the degree of environmental change, reduces the stress response of the crabs, and prevents the released crabs from dying due to excessive stress. By placing the artificial crab nest on the mudflat below the supporting roots among the aerial roots of the mangrove plants, turning the adjustment knob to loosen the wound connecting rope, and the rope body connecting the several movable blocks is extended, so that the several movable blocks can deflect freely. Then, by rotating the vertical flip seat and the horizontal rotation seat, the support plate is aligned with the gap of the supporting roots. The deflection of the movable block allows the support plate to pass through the staggered supporting roots and extend into the gap. Then, the adjustment knob is turned in the opposite direction to tighten the connecting rope. Tightening the rope knot pushes the several movable blocks closer to the artificial crab nest, and the support plate tends to be straight. At the same time, the movable block is blocked by the supporting roots, and the support plate cannot be completely straight. It squeezes the supporting roots from the side to generate a large friction force. The friction between the support plate and the supporting roots is used to fix the position of the artificial crab nest, which meets the crab's living conditions. The habit of digging holes in the mudflats under mangrove plants can be protected by artificial crab holes covered by aerial roots, reducing the probability of released crabs that have not adapted to the wild environment being preyed upon by natural enemies. The support plates can also prevent the artificial crab holes from being dug out from under the aerial roots by large natural enemies, further improving the protection effect and increasing the survival rate of released crabs. The released crabs can effectively expand the crab population in the mangroves, and then dig holes on their own to improve the mangrove environment, restore the density of crab holes in the mangroves, and release crabs prey on pests on mangrove plants to protect the normal ecology of the mangroves.

[0007] As a further improvement of the present invention, the side surface of the movable block is provided with continuous corrugated protrusions, and the corrugated protrusions on different support plates are consistent with each other.

[0008] After adopting the above method, continuous corrugated protrusions are provided on the side of the movable block. When the support plate squeezes the supporting root from the side, the corrugated protrusions fit the shape of the aerial root, increasing the contact surface between the two and further increasing the friction; when the artificial crab nest is pulled, the concave part of the corrugated protrusions can also hook the aerial root to generate greater resistance, ensuring that the artificial crab nest can be fixed under the aerial root; the corrugated protrusions on different support plates match each other, reducing the space occupied by a pair of support plates after closing, and avoiding the support plates hooking the aerial root when the artificial crab nest is placed under the aerial root.

[0009] As a further improvement of the present invention, the shelter tube is provided with a plurality of slide grooves along the axial direction, and the slide grooves extend to both ends of the shelter tube; the artificial crab nest is provided with a crab nest opening at one end corresponding to the inlet and outlet, and an operating circular hole, a power supply and a winding motor at the other end; a detachable bait seat is provided in the operating circular hole, and the bait seat is recessed on one side near the separation opening to form a bait cavity; a pressure sensor is provided at the bottom of the bait cavity, which is connected to a bait hanging hook; the power supply, the pressure sensor and the winding motor are signal-connected to each other; the winding motor is provided with a winding shaft and a reset button; a pull rope is connected to the winding shaft; the outer shell of the artificial crab nest includes a plurality of trigger channels corresponding to the slide grooves; the trigger channel is provided with a railing groove at one end near the inlet and outlet, a rotating shaft and a reset torsion spring are provided in the railing groove, the plurality of pull ropes pass through the plurality of trigger channels and extend into the railing groove to wind around the rotating shaft; the rotating shaft is connected to a movable railing, and the two ends of the reset torsion spring are respectively connected to the inner wall of the railing groove and the movable railing.

[0010] After adopting the above method, the bait seat is taken out from the operating circular hole, the bait is inserted into the bait hook and then the bait seat is reset, and the pressure sensor and the winding motor are turned on. When the crab clamps the bait, the bait hook is touched. The pressure sensor detects that the bait hook is touched and sends a signal to the winding motor. The winding motor drives the winding shaft to wind up the cable. The cable moves along the trigger channel, and then pulls the rotating shaft wrapped at the other end. The rotation of the rotating shaft drives the movable railing to rotate out of the railing groove and pass through the slide groove to block the entrance and exit, preventing the crab from returning to the crab cage from the shelter tube; when the artificial crab cave is pulled out, the movable railing can also sweep across the shelter tube along the slide groove, pushing the crab that has returned to the shelter tube into the artificial crab cave, ensuring that the crab stays in the artificial crab cave and moves together.

[0011] As a further improvement of the present invention, the opening of the operating circular hole is provided with a pair of baffle shafts, the positions of the pair of baffle shafts correspond to the two ends of the diameter of the operating circular hole, the baffle shafts are connected with a semicircular baffle and a closed torsion spring, the semicircular baffles are spliced ​​together to cover the operating circular hole, one end of the straight side of the semicircular baffle is connected to the baffle shaft, and the other end is provided with an oblique notch; the end face of the bait seat is provided with a pair of push columns corresponding to the oblique notch.

[0012] After adopting the above method, the baffle shaft is connected through a closed torsion spring to provide supporting force, keeping the connected semicircular baffle covering the operating circular hole, to prevent the crab from crawling out of the artificial crab nest through the operating circular hole when the bait seat is taken out; the push post of the bait seat passes through the oblique notch and fits into the semicircular baffle, and the bait seat is rotated. The push post pushes against the semicircular baffle and exerts force to push the semicircular baffle to rotate around the connected baffle shaft, staggered with the operating circular hole, so that the bait cavity is connected to the shelter tube.

[0013] As a further improvement of the present invention, an entry and exit groove is provided at one end of the operating circular hole away from the bait cavity, and the entry and exit groove extends along the axis of the operating circular hole. A turning groove is provided at the bottom of the entry and exit groove, and the turning groove extends along the circumferential direction of the operating circular hole. A clamping block is provided on the side wall of the turning groove, and the clamping block separates the turning groove to form a positioning groove. A positioning block is provided on the side of the bait seat, and the positioning block is inserted into the turning groove. The end of the positioning block is provided with a spherical surface.

[0014] After adopting the above method, by inserting bait on the bait hook, when the bait seat is reset, the side positioning block passes through the inlet and outlet grooves to reach the steering groove; when the push column pushes the semicircular baffle to be offset from the operating circular hole, the positioning block moves along the steering groove, and the groove wall of the steering groove presses against the positioning block, preventing the bait seat from moving axially along the operating circular hole and causing the push column and the semicircular baffle to separate; the positioning block is squeezed and passes over the card block into the positioning groove, and the card block presses the positioning block to remain in the positioning groove, preventing the bait seat from rotating to reset the semicircular baffle to block the bait cavity, thereby ensuring that the crab can be smoothly attracted by the bait; a spherical surface is set at the end of the positioning block to reduce the friction between the positioning block and the inlet and outlet grooves and the steering groove, thereby facilitating the movement of the positioning block in the groove.

[0015] As a further improvement of the present invention, the top surface of the crab cage is provided with a cover plate, one side of the cover plate is provided with an elastic support member, the elastic support member is connected to a lower pressure plate, the lower pressure plate is obliquely arranged above the cover plate, and the cover plate and the lower pressure plate are provided with a plurality of observation holes in corresponding positions.

[0016] After adopting the above method, the lower pressure plate is tilted and arranged above the cover plate, and the observation holes originally corresponding to each other are dislocated due to the oblique angle, thereby reducing direct sunlight from entering the crab cage and preventing crabs from being killed by direct sunlight in the crab cage; by applying downward force, the lower pressure plate is fitted with the cover plate, and the multiple observation holes that are staggered due to the tilt of the lower pressure plate overlap, forming an observation area that is convenient for directly viewing the interior of the crab cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of the present invention.

[0018] Figure 2 Shown is a schematic diagram of the crab cage structure.

[0019] Figure 3 Shown is a schematic diagram of the fixed bracket structure.

[0020] Figure 4 Shown is a schematic diagram of the structure of the operating circular hole of the artificial crab nest.

[0021] Figure 5 Shown is a schematic diagram of the bait seat structure.

[0022] Figure 6 Shown is a schematic diagram of the front view of the crab cave entrance.

[0023] Figure 7 Shown is a schematic diagram of the bait cavity structure.

[0024] Figure 8 Shown is a schematic diagram of the radial cross-section structure of the artificial crab cave.

[0025] 1-crab cage, 2-shelter tube, 3-artificial crab cave, 4-water supply pipe, 5-separation port, 6-bait cavity, 7-vertical flip seat, 8-horizontal rotation seat, 9-support plate, 901-movable block, 902-connecting rope, 903-adjusting knob, 10-corrugated protrusion, 11-slide, 12-crab cave mouth, 13-operating round hole, 14-winding motor, 15-bait seat, 16-pressure sensor, 17-bait hook, 18-pull rope, 19-trigger channel, 20-railing slot, 21-rotating shaft, 22-movable railing, 23-baffle rotating shaft, 24-semicircular baffle, 25-angled notch, 26-push column, 27-entry and exit slot, 28-steering slot, 29-block, 30-positioning slot, 31-positioning block, 32-cover plate, 33-lower pressure plate, 34-observation hole. DETAILED DESCRIPTION

[0026] like Figures 1-8The present invention relates to a mangrove protection device for improving the ecology by cultivating crabs, comprising a crab cage 1, a shelter pipe 2, and an artificial crab nest 3. The crab cage 1 is connected to a water supply pipe 4, which is provided with a sprinkler head. The shelter pipe 2 and the artificial crab nest 3 are both cylindrical structures. One end of the shelter pipe 2 is provided with an inlet and outlet connected to the side of the crab cage 1, and the other end is provided with a separation port 5. The artificial crab nest 3 is detachably mounted on the outside of the shelter pipe 2. The artificial crab nest 3 is provided with a fixed bracket and an openable and closable bait cavity 6, the position of which corresponds to the separation port 5. The fixed bracket includes a vertical flip seat 7, a horizontal rotating seat 8, and a pair of support plates 9 that are hinged to each other. The support plate 9 includes a plurality of movable blocks 901 and a connecting rope 902, which are sequentially connected by passing through the plurality of movable blocks 901. The support plate 9 is also connected to a rotatable adjustment knob 903. One end of the connecting rope 902 is wrapped around the adjustment knob 903, and the other end is provided with a tightening knot.

[0027] Crabs are cultured individually in the crab cage 1, and the shelter pipe 2 simulates the crab hole environment for the crabs to live and live in. The sprinkler head of the water supply pipe 4 sprays water into the crab cage 1 to prevent the environment from drying out and causing the crabs to die. Bait for catching crabs is placed in the bait cavity 6 to attract the crabs to pass through the shelter pipe 2 and enter the artificial crab cave 3 on the outside of the shelter pipe 2. The artificial crab cave 3 is pulled out to the end where the separation port 5 is located and separated from the shelter pipe 2. The crabs remain in the artificial crab cave 3. The artificial crab cave 3 is used to load and transport crabs, thereby preventing them from being pinched by crabs and protecting operators. The safety of the personnel is ensured; the artificial crab cave 3 is separated from the shelter tube 2, which are originally set together, and the artificial crab cave 3 replaces the natural crab cave for the released crabs to live in, so that part of the breeding environment is brought to the wild for placement, reducing the degree of environmental change, reducing the stress response of the crabs, and preventing the released crabs from excessive stress and death; by placing the artificial crab cave 3 on the mudflat below the support roots among the aerial roots of the mangrove plants, turning the adjustment knob 903 to loosen the wound connecting rope 902, and the rope body connecting the several movable blocks 901 is extended, so that the several movable blocks 901 can be freely deflected, and then by turning The vertical flip seat 7 and the horizontal rotation seat 8 are used to align the support plate 9 with the gap of the pillar roots. The movable block 901 is deflected so that the support plate 9 can pass through the staggered pillar roots and extend into the gap. Then, the adjusting knob 903 is rotated in the opposite direction to tighten the connecting rope 902. The tightening knot pushes several movable blocks 901 closer to the artificial crab cave 3, and the support plate 9 tends to be straight. At the same time, the movable block 901 is blocked by the pillar roots, and the support plate 9 cannot be completely straight. It squeezes the pillar roots from the side to generate a large friction force, and the friction between the support plate 9 and the pillar roots is used to fix the position of the artificial crab cave 3. The arrangement not only satisfies the habit of crabs to dig holes in the mudflats under the mangrove plants, but also can protect the artificial crab holes 3 by shielding them with aerial roots, thereby reducing the probability of released crabs that have not adapted to the wild environment being preyed upon by natural enemies. The support plate 9 can also prevent the artificial crab holes 3 from being dug out from under the aerial roots by large natural enemies, further improving the protection effect and the survival rate of released crabs, so that the released crabs can effectively expand the crab population in the mangroves, and then dig holes by themselves to improve the mangrove environment, restore the density of crab holes in the mangroves, and the released crabs can prey on pests on the mangrove plants, thereby protecting the normal ecology of the mangroves.

[0028] The side surface of the movable block 901 is provided with continuous corrugated protrusions 10 , and the corrugated protrusions 10 on different support plates 9 match each other.

[0029] Continuous corrugated protrusions 10 are provided on the side of the movable block 901. When the support plate 9 squeezes the pillar root from the side, the corrugated protrusions 10 fit the shape of the aerial root, increasing the contact surface between the two and further increasing the friction; when the artificial crab cave 3 is pulled, the concave part of the corrugated protrusion 10 can also hook the aerial root to generate greater resistance, ensuring that the artificial crab cave 3 can be fixed under the aerial root; the corrugated protrusions 10 on different support plates 9 match each other, reducing the space occupied by a pair of support plates 9 after closing, avoiding the support plate 9 hooking the aerial root when the artificial crab cave 3 is placed under the aerial root.

[0030] The shelter tube 2 is provided with a plurality of chutes 11 along the axial direction, and the chutes 11 extend to both ends of the shelter tube 2; the artificial crab cave 3 is provided with a crab cave opening 12 at one end corresponding to the inlet and outlet, and an operating circular hole 13, a power supply and a winding motor 14 at the other end; a detachable bait seat 15 is provided in the operating circular hole 13, and the side of the bait seat 15 close to the separation port 5 is recessed to form a bait cavity 6, and a pressure sensor 16 is provided at the bottom of the bait cavity 6, and the pressure sensor 16 is connected to a bait hook 17, and the power supply, the pressure sensor 16 and the winding motor 14 are mutually signal-connected. Then, the winding motor 14 is provided with a winding shaft and a reset button, and the winding shaft is connected with a cable 18. The shell of the artificial crab cave 3 includes a plurality of trigger channels 19 corresponding to the slide groove 11, and the trigger channel 19 is provided with a railing groove 20 at one end close to the entrance and exit. A rotating shaft 21 and a reset torsion spring are provided in the railing groove 20. The plurality of cables 18 pass through the plurality of trigger channels 19 and extend into the railing groove 20 to wind around the rotating shaft 21. The rotating shaft 21 is connected with a movable railing 22, and the two ends of the reset torsion spring are respectively connected to the inner wall of the railing groove 20 and the movable railing 22.

[0031] By taking out the bait seat 15 from the operating circular hole 13, inserting the bait onto the bait hook 17 and then resetting the bait seat 15, and turning on the pressure sensor 16 and the winding motor 14, the bait hook 17 is triggered when the crab grabs the bait. The pressure sensor 16 detects that the bait hook 17 is triggered and sends a signal to the winding motor 14. The winding motor 14 drives the winding shaft to wind up the cable 18. The cable 18 moves along the trigger channel 19, thereby pulling the rotating shaft 21 wound at the other end. The rotating shaft 21 rotates and drives the movable railing 22 to rotate out of the railing groove 20 and pass through the chute 11 to block the entrance and exit, preventing the crab from returning to the crab cage 1 from the shelter tube 2; when the artificial crab nest 3 is drawn out, the movable railing 22 can also sweep across the shelter tube 2 along the chute 11, pushing the crab that has returned to the shelter tube 2 into the artificial crab nest 3, ensuring that the crab stays in the artificial crab nest 3 and moves together.

[0032] The opening of the operating circular hole 13 is provided with a pair of baffle shafts 23, and the positions of the pair of baffle shafts 23 correspond to the two ends of the diameter of the operating circular hole 13. The baffle shafts 23 are connected with a semicircular baffle 24 and a closed torsion spring. The semicircular baffle 24 is spliced ​​to cover the operating circular hole 13. One end of the straight side of the semicircular baffle 24 is connected to the baffle shaft 23, and the other end is provided with an oblique notch 25; the end face of the bait seat 15 is provided with a pair of push columns 26 corresponding to the oblique notch 25.

[0033] The baffle shaft 23 is connected by a closed torsion spring to provide supporting force, keeping the connected semicircular baffle 24 covering the operating circular hole 13, to prevent the crab from crawling out of the artificial crab nest 3 from the operating circular hole 13 when the bait seat 15 is taken out; the push column 26 of the bait seat 15 passes through the angled notch 25 and fits into the semicircular baffle 24, and the bait seat 15 is rotated. The push column 26 presses against the semicircular baffle 24 and pushes the semicircular baffle 24 to rotate around the connected baffle shaft 23, staggered with the operating circular hole 13, so that the bait cavity 6 is connected to the shelter tube 2.

[0034] An inlet and outlet groove 27 is provided at one end of the operating circular hole 13 away from the bait cavity 6. The inlet and outlet groove 27 extends along the axis of the operating circular hole 13. A turning groove 28 is provided at the bottom of the inlet and outlet groove 27. The turning groove 28 extends along the circumferential direction of the operating circular hole 13. A clamping block 29 is provided on the side wall of the turning groove 28. The clamping block 29 separates the turning groove 28 to form a positioning groove 30. A positioning block 31 is provided on the side of the bait seat 15. The positioning block 31 is inserted into the turning groove 28, and the end of the positioning block 31 is provided with a spherical surface.

[0035] By inserting the bait hook 17 and resetting the bait seat 15, the side positioning block 31 passes through the inlet and outlet grooves 27 to reach the steering groove 28; when the push column 26 pushes the semicircular baffle 24 to be offset from the operating circular hole 13, the positioning block 31 moves along the steering groove 28 and the groove wall of the steering groove 28 presses against the positioning block 31, preventing the bait seat 15 from moving axially along the operating circular hole 13 and causing the push column 26 to separate from the semicircular baffle 24; the positioning block 31 squeezes and passes over the block 29 to enter the positioning groove 30, and the block 29 presses the positioning block 31 to remain in the positioning groove 30, preventing the bait seat 15 from rotating to reset the semicircular baffle 24 to block the bait cavity 6, thereby ensuring that the crab can be smoothly attracted by the bait; a spherical surface is provided at the end of the positioning block 31 to reduce the friction between the positioning block 31 and the inlet and outlet grooves 27 and the steering groove 28, thereby facilitating the movement of the positioning block 31 in the groove.

[0036] The top surface of the crab cage 1 is provided with a cover plate 32, and an elastic support member is provided on one side of the cover plate 32. The elastic support member is connected to a lower pressure plate 33, and the lower pressure plate 33 is obliquely arranged above the cover plate 32. The cover plate 32 and the lower pressure plate 33 are provided with a plurality of observation holes 34 in corresponding positions.

[0037] By tilting the lower pressing plate 33 above the cover plate 32, the observation holes 34 originally corresponding to each other are dislocated due to the oblique angle, thereby reducing direct sunlight from entering the crab cage 1 and preventing crabs from being killed by direct sunlight in the crab cage 1. By applying downward force, the lower pressing plate 33 is fitted with the cover plate 32, and the several observation holes 34 that are staggered due to the tilt of the lower pressing plate 33 overlap, forming an observation area that is convenient for directly viewing the interior of the crab cage 1.

Claims

1. A mangrove protection device for improving ecology by cultivating crabs, comprising a crab cage (1), a shelter pipe (2), and an artificial crab nest (3), wherein the crab cage (1) is connected to a water supply pipe (4), and the water supply pipe (4) is provided with a sprinkler head, characterized in that: The shelter tube (2) and the artificial crab nest (3) are both cylindrical structures. One end of the shelter tube (2) is provided with an inlet and outlet connected to the side of the crab cage (1), and the other end is provided with a separation port (5). The artificial crab nest (3) is detachably mounted on the outside of the shelter tube (2). The artificial crab nest (3) is provided with a fixed bracket and an openable and closable bait cavity (6). The position of the bait cavity (6) corresponds to the separation port (5). The fixed bracket includes a vertical flip seat (7) and a horizontal rotating seat (8) that are hinged to each other, and a pair of support plates (9). The support plate (9) includes a plurality of movable The support plate (9) is provided with a movable block (901) and a connecting rope (902), and the connecting rope (902) passes through the plurality of movable blocks (901) in sequence for connection; the support plate (9) is also connected with a rotatable adjustment knob (903), one end of the connecting rope (902) is wound around the adjustment knob (903), and the other end is provided with a tightening knot; the shelter tube (2) is provided with a plurality of slide grooves (11) along the axial direction, and the slide grooves (11) extend to both ends of the shelter tube (2); the artificial crab cave (3) is provided with a crab cave opening (12) at one end corresponding to the inlet and outlet, and an operating opening (12) at the other end A circular hole (13), a power supply and a winding motor (14); a detachable bait seat (15) is provided in the operating circular hole (13); a side of the bait seat (15) close to the separation port (5) is recessed to form a bait cavity (6); a pressure sensor (16) is provided at the bottom of the bait cavity (6); the pressure sensor (16) is connected to a bait hook (17); the power supply, the pressure sensor (16) and the winding motor (14) are mutually signal-connected; the winding motor (14) is provided with a winding shaft and a reset button; the winding shaft is connected to a cable (18) ), the shell of the artificial crab cave (3) includes a plurality of trigger channels (19) corresponding to the slide groove (11), the trigger channel (19) is provided with a railing groove (20) at one end close to the inlet and outlet, the railing groove (20) is provided with a rotating shaft (21) and a reset torsion spring, a plurality of the cables (18) pass through the plurality of trigger channels (19) and extend into the railing groove (20) to wind around the rotating shaft (21), the rotating shaft (21) is connected with a movable railing (22), and the two ends of the reset torsion spring are respectively connected to the inner wall of the railing groove (20) and the movable railing (22).

2. The mangrove protection device for improving ecology by utilizing crab farming according to claim 1, characterized in that: The side surface of the movable block (901) is provided with continuous corrugated protrusions (10), and the corrugated protrusions (10) on different support plates (9) are aligned with each other.

3. The mangrove protection device for improving ecology by using cultured crabs according to claim 1, characterized in that: The opening of the operating circular hole (13) is provided with a pair of baffle shafts (23), the positions of the pair of baffle shafts (23) correspond to the two ends of the diameter of the operating circular hole (13), and the baffle shafts (23) are connected with a semicircular baffle (24) and a closed torsion spring, and the semicircular baffle (24) is spliced ​​to cover the operating circular hole (13), one end of the straight side of the semicircular baffle (24) is connected to the baffle shaft (23), and the other end is provided with an oblique notch (25); the end face of the bait seat (15) is provided with a pair of push columns (26) corresponding to the oblique notch (25).

4. The mangrove protection device for improving ecology by cultivating crabs according to claim 3, characterized in that: An inlet and outlet groove (27) is provided at one end of the operating circular hole (13) away from the bait cavity (6), and the inlet and outlet groove (27) extends along the axis of the operating circular hole (13). A steering groove (28) is provided at the bottom of the inlet and outlet groove (27), and the steering groove (28) extends along the circumferential direction of the operating circular hole (13). A clamping block (29) is provided on the side wall of the steering groove (28), and the clamping block (29) separates the steering groove (28) to form a positioning groove (30). A positioning block (31) is provided on the side surface of the bait seat (15), and the positioning block (31) is inserted into the steering groove (28). The end of the positioning block (31) is provided with a spherical surface.

5. The mangrove protection device for improving ecology by cultivating crabs according to claim 1, characterized in that: The top surface of the crab cage (1) is provided with a cover plate (32), one side of the cover plate (32) is provided with an elastic support member, the elastic support member is connected to a lower pressure plate (33), the lower pressure plate (33) is arranged obliquely above the cover plate (32), and the cover plate (32) and the lower pressure plate (33) are provided with a plurality of observation holes (34) at corresponding positions.

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