Large-water-surface fresh water bighead carp enhancement and release device

Abstract

The invention discloses a large-water-surface fresh water bighead carp enhancement and release device which is composed of a double-layer nylon bag and an oxygen inflator matched with the double-layer nylon bag, two hot melting sealing edges are arranged at bag openings of the double-layer nylon bag, one hot melting sealing edge is arranged between an inner layer and an outer layer, and the other hot melting sealing edge is arranged at the upper end of the inner layer; an opening is formed in the outer layer nylon bag, an air pipe is connected to the opening, an air nozzle is arranged at the other end of the air pipe, an air stopper is arranged to be matched with the air nozzle, and the air nozzle is matched with an inflation opening of an oxygen inflator. The aristichthys nobilis population condition can be effectively improved, sustainable development is promoted, and the precious aquatic organism resource is well protected and utilized. Gradual releasing can be achieved, and the transportation device and the releasing device are combined into a whole; the oxygenating packaging device and the transportation equipment before transportation are also used as a releasing device; the number of required devices is reduced, and the enhancement and release cost is reduced; through consideration, all links of enhancement and release are comprehensively considered, and devices required by seedling transportation and release procedures are combined into one.

Description

Technical Field

[0001] The present invention relates to the breeding of aquatic animals (A01K61 / 00) (A01K61* fry and fish fingerling breeding), and in particular to a device for multiplying and releasing freshwater bighead carp in large water areas. Background Art

[0002] Large-scale artificial enhancement and release of bighead carp is an important measure to increase fish stocks and improve ecological balance in aquatic areas through artificial intervention. It is particularly widely used in large water bodies such as lakes and reservoirs. Enhancement and release devices are key equipment for aquatic biological resource enhancement and ecological restoration. Their design aims to improve release efficiency, minimize seed damage, and reduce operational risks. Bighead carp is a common freshwater fish species used in artificial enhancement and release, and has significant ecological benefits and scientific research value. In recent years, with the continuous advancement of aquatic ecological and environmental protection efforts, the frequency of artificial enhancement and release has increased significantly. Bighead carp plays a crucial ecological role in ecosystems, such as controlling benthic animal populations, food web structure, and species richness. Increasing bighead carp populations can help maintain ecological balance and promote the conservation of aquatic biodiversity. Furthermore, bighead carp is widely used for food and aquaculture, playing a vital role in the development of the fishery industry. Artificial enhancement and release of bighead carp fry and seed cultivation are crucial for restoring fish stocks, maintaining ecological balance, promoting economic development, preserving genetic diversity, and providing educational and scientific value.

[0003] Aquatic biorestocking involves multiple technical steps, including broodstock selection and management, seedling propagation and cultivation, seedling transportation, tagging methods, and release strategies. Zhao Wei, in his paper "Cultivation Technology for Artificially Restocked Bighead Carp Fry," published in the journal Scientific Fish Farming on July 10, 2022, noted that fry are typically transported in double-layer nylon bags filled with oxygen. Each bag contains 100,000 fry, filled with oxygen and sealed, and then transported to the pond entrance by vehicle. For shorter transport distances, direct barreling with water can be used, with transport time required to be within 5 minutes. The stocking density is 300,000 fry per mu (approximately 1.5 acres), typically with monoculture; mixed stocking is not recommended. When stocking fry, select an upwind location in the pond, open the bag, and gently place both the fish and the water into the water. Avoid rough handling to muddy the water. When releasing fry from barrels over short distances, also gently place both the fish and the water into the water, avoiding rough movements. Therefore, transporting fry prior to stocking requires not only double-layer nylon bags but also an oxygenator for the oxygenated packaging. The patent with publication number CN205865620U: includes a frame and a flexible water tank, the flexible water tank is made of waterproof cloth and placed in the frame, and a discharge port is provided at the bottom of one side of the flexible water tank. The discharge port is in a conical tube shape or a terrace shape and is also made of waterproof cloth. The root of the discharge port is fixedly connected to the flexible water tank, and its outer port faces the outside of the flexible water tank. The discharge port is foldable and has a hook on the outer port; an inflatable air cushion is also provided at the bottom of the frame, and the inflatable air cushion is provided with an air charging and discharging port, and the air charging and discharging port is connected to a pressure air pump through an air pipe... 4. When releasing, the discharge port 5 of the flexible water tank 2 is lowered to allow the released fishery organisms to flow into the release water area by themselves, and then the pressure air pump 9 is used to inflate the inflatable air cushion 7, so that the frame 1 is tilted to let all the seedlings flow out; it also requires a pressure air pump when releasing; the number of devices required for the reproduction and release device is large, which increases the cost of reproduction and release. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a large-scale freshwater bighead carp breeding and release device that can effectively improve the status of bighead carp populations, promote sustainable development, and protect and utilize this precious aquatic biological resource. The device can gradually release the fish and integrates the equipment for transport and release into one device. The oxygenation packaging device and transportation equipment before transportation also serve as the release device. The number of required devices is reduced, lowering the breeding and release costs. A comprehensive consideration of all aspects of breeding and release is made, integrating the equipment required for seedling transportation and release into one device.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is to design a large-surface freshwater bighead carp proliferation and release device, which is composed of a double-layer nylon bag and an oxygen inflator arranged in conjunction with the double-layer nylon bag. The two layers of nylon bags of the double-layer nylon bag are provided with two hot-melt sealed edges at the bag opening, one hot-melt sealed edge is arranged between the inner nylon bag and the outer nylon bag, and the other is arranged at the upper end of the inner nylon bag; an opening is provided on the outer nylon bag, and a trachea is connected to the opening. An air nozzle is provided at the other end of the trachea, and an air stop is adapted to the air nozzle, and the air nozzle is adapted to the inflation port of the oxygen inflator. The freshwater bighead carp reproduction and release device can effectively improve the bighead carp population status, promote sustainable development, and protect and utilize this precious aquatic biological resource; the hot-melt seal provided between the inner layer and the outer layer is used to seal the end between the inner layer and the outer layer, thereby forming a space between the inner and outer layers, and another hot-melt seal provided at the upper end of the inner layer is used to seal the upper end of the inner layer to seal it after the fish is loaded and oxygenated; and the opening provided on the outer nylon bag is connected to the space between the inner and outer layers, so that the inner nylon bag can bulge inward during subsequent inflation, which facilitates the pushing of the water in the inner nylon bag and facilitates the release operation.

[0006] The oxygenation process is as follows: First, fill the inner nylon bag with clean water, one-third to one-half its volume. Then, gently pour the fry and fingerlings into the bag with a small amount of water. Once the fry or fingerlings are inside, oxygenate immediately. This is done by first pressing out the air inside the bag, then inserting the oxygenator hose into the inner nylon bag and hand-sealing the bag tightly to prevent air leaks. Then slowly open the valve of the oxygen inflator and slowly fill it with oxygen. After the entire bag is inflated, quickly pull out the rubber tube and use a heat sealer to heat-melt the bag opening (the hot-melt sealing here is used to seal the double-layer nylon bag to achieve oxygenation and sealing); the two-layer nylon bag is provided with a hot-melt sealing at the bag opening to form a space between the outer layer and the inner layer of the double-layer nylon bag, and the oxygen inflator oxygenates the space inside the inner nylon bag; subsequently, it is used to inflate the space between the outer layer and the inner layer of the double-layer nylon bag to achieve the effect of gradual release; in this way, the equipment for transportation and release is combined into one; the oxygenation packaging device before transportation (including the oxygen inflator) and the transportation equipment (i.e., the double-layer nylon bag) are also used as a release device; the number of required devices is reduced, and the cost of reproduction and release is reduced; comprehensive consideration is given to all aspects of reproduction and release, such as seedling transportation, and the devices required for different release processes are combined into one, so that one device can be used for two purposes, which is an ingenious idea.

[0007] A further technical solution is that a hot-melt sealing edge is provided at a corner of the double-layer nylon bag away from the bag opening to separate the space between the inner nylon bag and the outer nylon bag into two independent spaces, and two openings are provided and are respectively located on the outer nylon bag where an independent space is located.

[0008] That is, there are three hot-melt sealing edges, two of which are located at the upper end of the double-layer nylon bag, respectively arranged between the inner and outer layers and on the inner layer, and one is arranged near a corner of the nylon bag.

[0009] A further technical solution is that the double-layer nylon bag is also equipped with a pair of scissors for cutting a corner of the double-layer nylon bag to form a discharge port.

[0010] After the oxygenation and sealing is completed, the opening near one corner of the outer nylon bag is inflated to make the corner tilt up, and then the double-layer nylon bag is transported to transport the bighead carp fry to a large water surface. Before releasing, the tilted corner is cut with scissors to form a release port; then the air stop at the opening at one corner is opened to release air, so that the release port gradually tilts downward to facilitate release; then the other opening is inflated to make the space between the outer layer and the inner layer inflated, so that the inner nylon bag tilts inward, which has the effect of pushing the water in the inner nylon bag, and further the remaining bighead carp fry are released.

[0011] A further technical solution is that a placing piece is provided in conjunction with the double-layer nylon bag. The placing piece for the double-layer nylon bag includes a circular ring at the bottom, and a support rod for placing the double-layer nylon bag is fixedly connected to the circular ring.

[0012] A further technical solution is that two support rods located in the diameter direction of the ring are fixedly connected to the ring, the two support rods are perpendicular to each other, and there are four vertical rods perpendicular to the plane where the ring is located, and they are all fixedly connected to the ring. An arc rod is fixedly connected between the two vertical rods located on the diameter of the ring near a corner of the double-layer nylon bag. The curvature of the arc rod is consistent with that of the ring. The arc rod is movably connected to a straight rod through a rubber ring. A slot adapted to the straight rod is provided on the support rod. There are several slots and there are gaps between adjacent slots.

[0013] The rubber ring is set on the arc rod, and the straight rod is inserted into the rubber ring, which is equivalent to a rubber ring set on both the arc rod and the straight rod, and the bottom end of the straight rod is inserted into the slot, so the straight rod will not fall off the placement piece due to the action of the rubber ring set on the arc rod; when the opening near one corner of the outer nylon bag is inflated to make this corner tilted, the straight rod is pulled out appropriately and then tilted at an angle, and then the straight rod is inserted into the slot near the middle of the ring. The specific slot to be selected depends on the tilting of the aforementioned corner of the nylon bag. The more preferred solution is to design two straight rods, each of which is movably connected to the arc rod through a rubber ring, and the two straight rods are arranged at a certain angle, and the number of support rods fixedly connected to the bottom ring is also increased, more than two, three can be arranged, so that the two straight rods are respectively inserted into the slots on one support rod to form a triangular stable structure, which can ensure that the tilted corner is always on the top during transportation to finally form a discharge port.

[0014] A further technical solution is that a third support rod located in the diameter direction of the ring is fixedly connected to the bottom ring, and the placement component also includes a second straight rod, which is also movably connected to the arc rod through the rubber ring, and the two straight rods are set at a certain angle.

[0015] The size of the opening near one corner is smaller than that of the other opening; the outer nylon bag of the double-layer nylon bag is further provided with an opening near the aforementioned corner (i.e., there are three openings in total, one opening is near the bag opening or located in the middle of the double-layer nylon bag, and two openings are provided near one corner, and the sum of the areas of these two openings is the same as the area of the opening near the bag opening); an elastic air bag is fixedly connected to the surface of the two straight rods facing the raised corner of the double-layer nylon bag (a more preferred solution is: an elastic air bag with a width slightly larger than the diameter of the straight rod is fixedly provided on the two straight rods, so that when one corner of the double-layer nylon bag is deflated, the elastic air bag at the straight rod expands, and the discharge port gradually tilts downward along the space between the two straight rods, similar to a sliding The process is that the two elastic air bags are set up so that the expansion process is relatively consistent, which can ensure that the discharge port tilts downward from the space between the two straight rods, and avoid the situation where the discharge port tilts to one side and hits the straight rod. If the discharge port hits the straight rod during the process of tilting downward, it may harm the fry being released for reproduction). An opening is set on the elastic air bag, and a vent tube is connected to the opening. The vent tube is adapted to the opening near one corner. When deflating the raised corner, on the one hand, one opening near the corner is connected to the vent tube, and on the other hand, the air stop of the other opening near the corner is unplugged to directly exhaust the air. In this way, the deflation process is slow because some gas enters the elastic air bag, causing the elastic air bag to expand, thus preventing the discharge port from tilting downward too quickly. This further slows down the deflation, causing the discharge port to gradually tilt downward for easier release, and also avoids the damage to the fry being released for reproduction due to the discharge port tilting downward too quickly.

[0016] A plurality of elastic buffers are arranged at intervals on the inner wall of the inner nylon bag; self-locking heads are provided on the outer nylon bag and the inner nylon bag of the double-layer nylon bag, and at least two self-locking heads are provided, which separate the space between the outer nylon bag and the inner nylon bag of the double-layer nylon bag; a distance is provided between the self-locking head of the hot-melt sealed edge near one corner and the hot-melt sealed edge; the opening provided on the outer nylon bag is located on one side of the self-locking head used.

[0017] A self-sealing strip is fixedly connected to the inner side of the outer nylon bag, and a self-sealing strip is also fixedly connected to the outer side of the inner nylon bag at the corresponding position. The self-locking head is a snap-fit rib set on the self-sealing strip, and the snap-fit ribs on the end surfaces of the two self-sealing strips that are in contact are staggered. The locking rib is provided with at least two places where the locking force is relatively weak along the entire length direction; the elasticity of the material used for the locking rib section at the relatively weaker place is slightly worse than that of other parts of the same locking rib, so that the locking force of this part is weaker, which makes it easier to open the self-locking head after a short period of inflation to enter the next part of the space (referring to the space between the outer nylon bag and the inner nylon bag between the last two self-locking heads), avoiding the problem of the self-locking head being too difficult to open.

[0018] The advantages and beneficial effects of the present invention are that: the freshwater bighead carp proliferation and release device can effectively improve the population status of bighead carp, promote sustainable development, and protect and utilize this precious aquatic biological resource; the hot-melt sealing edge arranged between the inner layer and the outer layer is used to seal the end between the inner layer and the outer layer, thereby forming a space between the inner and outer layers, and another hot-melt sealing edge arranged at the upper end of the inner layer is used to seal the upper end of the inner layer to seal after the fish is loaded and oxygenated; and the opening arranged on the outer nylon bag is connected to the space between the inner and outer layers, so that the inner nylon bag can bulge inward during subsequent inflation, which is convenient for pushing the water in the inner nylon bag and facilitating the release operation.

[0019] The space between the outer and inner layers of the double-layer nylon bag is inflated to achieve a gradual release effect; in this way, the equipment for transportation and release are combined into one; the oxygenation packaging device (including the oxygen inflator) and the transportation equipment (i.e. the double-layer nylon bag) before transportation also serve as the release device; the number of devices required is reduced, lowering the cost of reproduction and release; taking all aspects of reproduction and release into consideration, such as the devices required for different processes of seedling transportation and release are combined into one, so that one device can be used for two purposes, which is an ingenious idea.

[0020] It can ensure that the corner that is raised during transportation is always at the top to eventually form a discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded schematic diagram of a first embodiment of a large-surface freshwater bighead carp proliferation and release device according to the present invention; Figure 2 yes Figure 1 Front view of the middle double-layer nylon bag; Figure 3 yes Figure 2 Rear view; Figure 4 yes Figure 2 Another working state schematic diagram; Figure 5 yes Figure 4 A schematic diagram of a double-layer nylon bag placed in a placement piece; Figure 6 yes Figure 5 Schematic diagram of the central placement; Figure 7 yes Figure 6Top view after removing the curved rod and straight rod; Figure 8 yes Figure 6 A top view of the middle curved rod, the straight rod, and the rubber ring; Figure 9 is a schematic diagram of a second embodiment of the present invention; Figure 10 This is an exploded schematic diagram of the double-layer nylon bag and the placement piece in the third embodiment of the present invention; Figure 11 yes Figure 10 Top view of the center piece after removing the support plate and airbag; Figure 12 yes Figure 10 Schematic diagram of the middle connecting rod and the support plate in the C direction; Figure 13 yes Figure 12 A top view of Figure 14 yes Figure 12 A magnified schematic diagram of part A; Figure 15 yes Figure 13 An enlarged schematic diagram of part B; Figure 16 Schematic diagram of a double-layer nylon bag provided with only elastic buffer members in a fourth embodiment of the present invention; Figure 17 yes Figure 16 AA cross-sectional view; Figure 18 yes Figure 16 Added a schematic diagram showing the self-locking head.

[0022] In the figure: 1. Double-layer nylon bag; 2. Oxygen inflator; 3. Hot-melt edge sealing; 4. Opening; 5. Inflation port; 6. Ring; 7. Support rod; 8. Vertical rod; 9. Curved rod; 10. Rubber ring; 11. Straight rod; 12. Slot; 13. Elastic air bag; 14. Ventilation tube; 15. Connecting rod; 16. Support plate; 17. Air bag; 18. Bump; 19. Slide; 20. Baffle; 21. Roller; 22. Elastic buffer; 23. Self-locking head; 24. Outer nylon bag; 25. Inner nylon bag. DETAILED DESCRIPTION

[0023] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] Example 1: Figures 1 to 8 As shown (for ease of illustration, Figure 1 The other opening and the opening at one corner of the outer nylon bag are not shown; Figure 6(The rubber ring is not shown in the figure). The present invention is a large-scale freshwater bighead carp proliferation and release device, which consists of a double-layer nylon bag 1 and an oxygen inflator 2 provided in conjunction with the double-layer nylon bag. The two layers of the double-layer nylon bag are provided with two hot-melt sealed edges 3 at the bag opening, one hot-melt sealed edge being provided between the inner layer and the outer layer, and the other being provided at the upper end of the inner layer; an opening 4 is provided on the outer nylon bag, the opening being connected to an air pipe, an air nozzle being provided at the other end of the air pipe, an air stop being provided in conjunction with the air nozzle, and the air nozzle being adapted to an inflation port 5 of the oxygen inflator; The oxygenation process is as follows: First, fill the inner nylon bag with clean water, one-third to one-half its volume. Then, gently pour the fry and fingerlings into the bag with a small amount of water. Once the fry or fingerlings are inside, oxygenate immediately. This is done by first pressing out the air inside the bag, then inserting the oxygenator hose into the inner nylon bag and hand-sealing the bag tightly to prevent air leaks. Then slowly open the valve of the oxygen inflator and slowly fill it with oxygen. After the entire bag is inflated, quickly pull out the rubber tube and use a heat sealer to heat-melt the bag opening (the hot-melt sealing here is used to seal the double-layer nylon bag to achieve oxygen sealing); the two-layer nylon bag is provided with a hot-melt sealing at the bag opening to form a space between the outer layer and the inner layer of the double-layer nylon bag, and the oxygen inflator oxygenates the space inside the inner nylon bag; subsequently, it is used to inflate the space between the outer layer and the inner layer of the double-layer nylon bag (so that the inner nylon bag bulges inward) to achieve the effect of gradual release; in this way, the equipment for transportation and release is combined into one; the oxygenation packaging device before transportation (including the oxygen inflator) and the transportation equipment (i.e. the oxygenated and sealed double-layer nylon bag) are also used as the release device; the number of devices required is reduced, and the cost of reproduction and release is reduced; comprehensive consideration is given to all aspects of reproduction and release, such as the devices required for seedling transportation and release in different processes are combined into one, and one device is used for two purposes, which is an ingenious idea; A hot-melt sealing edge 3 is provided at a corner of the double-layer nylon bag away from the bag opening, which is used to separate the space between the inner nylon bag and the outer nylon bag into two independent spaces. The openings 4 are provided with two openings, each located on the outer nylon bag where an independent space is located. The double-layer nylon bag is also equipped with scissors for cutting a corner of the double-layer nylon bag to form a discharge port; After the oxygenation and sealing is completed, the opening near one corner of the outer nylon bag is inflated to make the corner tilt up. The double-layer nylon bag is then transported to a large water surface to carry the bighead carp fry. Before releasing the fry, the tilted corner is cut with scissors to form a release port. The air stop at the opening at one corner is then opened to release air, so that the release port gradually tilts downward to facilitate release. The other opening is then inflated to make the space between the outer and inner layers become air-filled, so that the inner nylon bag tilts inward (or bulges), which has the effect of pushing the water in the inner nylon bag, and further allows the remaining bighead carp fry to be released. The double-layer nylon bag is also equipped with a placement piece, which includes a circular ring 6 at the bottom, two (or three) support rods 7 fixedly connected to the circular ring and located in the diameter direction of the circular ring, the two support rods being perpendicular to each other and a vertical rod 8 being perpendicular to the plane where the circular ring is located, four (or six or eight) vertical rods being provided and all being fixedly connected to the circular ring, an arc-shaped rod 9 being fixedly connected between the two vertical rods 8 located on the diameter of the circular ring near one corner of the double-layer nylon bag, the curvature of the arc-shaped rod being consistent with that of the circular ring, a straight rod 11 being movably connected to the arc-shaped rod through a rubber ring 10, a slot 12 being provided on the support rod that is adapted to the straight rod, a plurality of slots 12 being provided and intervals being provided between adjacent slots; a placement bag can be fixedly connected at the middle height of the arc-shaped rod or the vertical rod, and the scissors are placed in the placement bag; After the double-layer nylon bag is oxygenated and sealed, it is placed in the placement piece, specifically on the support rod 7; the rubber ring 10 is sleeved on the arc rod 9, and the straight rod 11 is inserted in the rubber ring 10, which is equivalent to a rubber ring sleeved on both the arc rod and the straight rod, and the bottom end of the straight rod is inserted into the slot, so the straight rod 11 will not be separated from the placement piece due to the action of the rubber ring 10 sleeved on the arc rod 9; when the opening near one corner of the outer nylon bag is inflated to make this corner tilted, the straight rod is pulled out appropriately, tilted at an angle, and then inserted into the slot near the middle of the ring. The slot depends on the situation of the aforementioned corner of the nylon bag being tilted, and can ensure that the tilted corner is in a stable state after being supported by the straight rod 11; a more preferred solution is: designing two straight rods 11, each of which is movably connected to the arc rod through a rubber ring, and the two straight rods 11 are set at a certain angle, and the number of support rods 7 fixedly connected to the bottom ring is also increased, more than two, three can be set, so that the two straight rods are respectively inserted into the slots on a support rod to form a triangular stable structure, which can ensure that the tilted corner during transportation is always on the top to ultimately form a discharge port.

[0025] Example 2: The difference from Example 1 is that Figure 9As shown, the size of the opening 4 near one corner is smaller than that of the other opening 4; the outer nylon bag of the double-layer nylon bag is further provided with an opening 4 near the aforementioned corner (that is, a total of three openings 4, one opening is close to the bag opening or located in the middle of the double-layer nylon bag, and two openings are provided near one corner, and the sum of the areas of these two openings 4 is the same as the area of the opening 4 near the bag opening); an elastic air bag 13 is fixedly connected to the surface of the two straight rods 11 facing the raised corner of the double-layer nylon bag (a more preferred solution is: an elastic air bag 13 with a width slightly larger than the diameter of the straight rod is fixedly provided on the two straight rods, so that when one corner of the double-layer nylon bag is deflated, the elastic air bag 13 at the straight rod 11 expands, and the discharge port gradually tilts downward along the space between the two straight rods, similar to a slide The process of falling, and the setting of the two elastic air bags 13 makes the expansion process more consistent, which can ensure that the discharge port tilts downward from the space between the two straight rods, avoiding the situation that the discharge port tilts to one side and hits the straight rod 11, and if the discharge port hits the straight rod 11 during the tilting downward process, it is possible to damage the seedlings of the proliferation and release). The elastic air bag is provided with an opening, and the opening is connected with a vent pipe 14, which is adapted to the opening near the corner. When the tilted corner is deflated, on the one hand, an opening 4 near the corner is connected to the vent pipe 14, and on the other hand, the air stop of the other opening near the corner is pulled out to directly exhaust. The deflation process is slow like this, because some gas enters the elastic air bag to expand the elastic air bag, avoiding the discharge port tilting downward too fast. Further slowly deflate like this, so that the discharge port gradually tilts downward for the convenience of discharge, and also avoids the discharge port tilting downward too fast to the damage to the proliferation and release fry.

[0026] Example 3: The difference from Example 1 is that Figures 10 to 15 As shown (for ease of illustration, Figure 15 Only the roller at the bottom is shown), two parallel support rods 7 are fixedly connected to the ring 6 (two parallel support rods 7 are also provided on the ring, so that a total of four support rods are provided, two horizontal and two vertical, to facilitate the placement of double-layer nylon bags), two of which are parallel to each other. A connecting rod 15 inclined to the mid-vertical line is fixedly provided on the two parallel support rods 7, and four connecting rods 15 are provided to form a slide rail, and a support plate 16 is slidably provided on the connecting rod, and an airbag 17 is fixedly connected to the lower surface of the support plate 16, and the end of the airbag away from the support plate is fixedly connected to the ring 6 of the placement member; a vertical rod 8 fixedly connected to the ring is provided perpendicular to the plane where the ring is located. The four connecting rods 15 are provided with slide grooves, and the two sides of the support plate 16 are provided with protrusions 18 adapted to the slide grooves 19. There are four protrusions in total. The lower surface of the support plate is fixedly connected to a baffle 20 extending downward. The baffle 20 is parallel to the busbar direction of the connecting rod 15. The width of the baffle is greater than the width of the slide groove 19. The part of the baffle located outside the slide groove is rotatably provided with a roller 21.

[0027] Due to the arrangement of the baffle parallel to the connecting rod, rollers are also arranged on the baffle, so that the support plate is not easily stuck when sliding on the connecting rod, and it is easy to keep the inclination angle of the support plate to the horizontal plane unchanged during the sliding process.

[0028] After such arrangement, the double-layer nylon bag is placed in the placement piece, and then one corner of the double-layer nylon bag is inflated, and the airbag is also inflated at the same time (the airbag is arranged with a similar structure, such as an opening, and a matching air stop is arranged at the opening). In this way, due to the existence of the vertical rod, the double-layer nylon bag basically remains stably placed in the placement piece, and one corner is tilted when inflated, and at the same time, the inflation of the airbag pushes the support plate to slide obliquely upward, thereby stabilizing the tilted corner (on the other hand, the inflation of the independent space corresponding to the corner and the oblique upward sliding of the support plate can also reduce the amount of gas in the independent space corresponding to the tilted corner, so that the subsequent deflation will be slower, which can avoid the discharge port tilting downward too quickly and damaging the seedlings for proliferation and release); the setting of the support plate can better ensure the stability of the tilted corner during transportation, and ensure The raised corner is always raised, so that the discharge port is located at the top rather than the side when it is cut later, which can avoid the discharge speed being too fast and damaging the seedlings; it can ensure that the discharge port size is large enough, and if the corner is not stably raised, for example, if part of it slides down during transportation, it will be difficult to take into account the discharge port size and avoid releasing too quickly when cutting it during the final release (if the corner is not stably raised, the corner of the nylon bag at the top is small. To ensure that the discharge port is directly above when it is just cut, the discharge port size must be small. If it is too small, the seedlings will squeeze each other during the release process; and if the corner is not stably raised, in order to ensure a large discharge port, it can be cut obliquely, but some seedlings will flow out of the oblique discharge port when it is just cut, so the discharge speed is too fast and it will damage the seedlings). After using scissors to cut the raised corner to form the discharge outlet, first deflate the air bag so that the support plate slides downward obliquely so that the discharge outlet tilts slightly downward (due to the setting of the four connecting rods, it hardly affects the downward tilt of the discharge outlet, and a corner of the double-layer nylon bag slides down from the space between the four connecting rods). Then, deflate a corner of the double-layer nylon bag to make the discharge outlet gradually tilt downward, avoiding the discharge outlet tilting downward too quickly and damaging the seedlings being released for reproduction.

[0029] Example 4: The difference from Example 1 is that Figure 16 、 Figure 17 As shown, a plurality of elastic buffer members 22 are arranged at intervals on the inner wall of the inner nylon bag; Figure 18 As shown, self-locking heads 23 are provided on the outer nylon bag 24 and the inner nylon bag 25 of the double-layer nylon bag. There are at least two self-locking heads, and the self-locking heads 23 separate the space between the outer nylon bag and the inner nylon bag of the double-layer nylon bag; there is a distance between the self-locking head of the hot-melt seal 3 near one corner and this hot-melt seal; the opening 4 set on the outer nylon bag is located on one side of the self-locking head used.

[0030] A self-sealing strip is fixedly connected to the inner side of the outer nylon bag, and a self-sealing strip is also fixedly connected to the outer side of the inner nylon bag at the corresponding position. The self-locking head is a snap-fit rib set on the self-sealing strip, and the snap-fit ribs on the end surfaces of the two self-sealing strips that are in contact are staggered. The locking rib is provided with at least two places where the locking force is relatively weak along the entire length direction; the elasticity of the material used for the locking rib section at the relatively weaker place is slightly worse than that of other parts of the same locking rib, so that the locking force of this part is weaker, which makes it easier to open the self-locking head after a short period of inflation to enter the next part of the space (referring to the space between the outer nylon bag and the inner nylon bag between the last two self-locking heads), avoiding the problem of the self-locking head being too difficult to open.

[0031] The elastic buffer can be made of elastic sponge; in this way, when the oxygen oxygenator inflates the space between the outer layer and the inner layer of the double-layer nylon bag, it can avoid the speed being too fast and causing fright, impact, squeezing or injury to the released fry; when inflating, only part of the inner nylon bag bulges inward first, and when the air pressure is large enough, the first self-locking head is opened and then the space between the outer layer and the inner layer between the two subsequent self-locking heads is inflated. This arrangement uses the self-locking head of the ziplock bag, so that when inflating the space between the outer layer and the inner layer of the double-layer nylon bag, the speed at which the inner nylon bag bulges inward is further reduced without greatly affecting (or occupying) the accommodation space of the inner nylon bag.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for increasing and releasing freshwater bighead carp on a large surface of water, characterized in that: The utility model is composed of a double-layer nylon bag and an oxygen inflator matched with the double-layer nylon bag. The two layers of the double-layer nylon bag are provided with two hot-melt sealed edges at the bag opening, one hot-melt sealed edge is arranged between the inner nylon bag and the outer nylon bag, and the other is arranged at the upper end of the inner nylon bag; an opening is arranged on the outer nylon bag, the opening is connected to a trachea, an air nozzle is arranged at the other end of the trachea, an air stop is adapted to the air nozzle, and the air nozzle is adapted to the inflation port of the oxygen inflator.

2. The large-surface freshwater bighead carp proliferation and release device according to claim 1, characterized in that: A hot melt sealing edge is provided at a corner of the double-layer nylon bag away from the bag opening to separate the space between the inner nylon bag and the outer nylon bag into two independent spaces. There are two openings, each located on the outer nylon bag where an independent space is located.

3. The large-surface freshwater bighead carp proliferation and release device according to claim 2, characterized in that: The double-layer nylon bag is also equipped with scissors for cutting a corner of the double-layer nylon bag to form a discharge port.

4. The large-surface freshwater bighead carp proliferation and release device according to claim 3, characterized in that: The double-layer nylon bag is also equipped with a placing piece, which includes a circular ring at the bottom, and a support rod for placing the double-layer nylon bag is fixedly connected to the circular ring.

5. The large-surface freshwater bighead carp proliferation and release device according to claim 4, characterized in that: Two support rods located in the diameter direction of the ring are fixedly connected to the circular ring. The two support rods are perpendicular to each other. There are four vertical rods perpendicular to the plane where the ring is located and they are all fixedly connected to the circular ring. An arc rod is fixedly connected between the two vertical rods located on the diameter of the circular ring near one corner of the double-layer nylon bag. The curvature of the arc rod is consistent with that of the circular ring. The arc rod is movably connected to a straight rod through a rubber ring. A slot adapted to the straight rod is provided on the support rod. There are several slots and there are gaps between adjacent slots.

6. The large-surface freshwater bighead carp proliferation and release device according to claim 5, characterized in that: A third support rod located in the diameter direction of the ring is also fixedly connected to the bottom ring. The placement component also includes a second straight rod, which is also movably connected to the arc rod through the rubber ring. The two straight rods are set at a certain angle.

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