A siphon type water plant growing device for hygrophila difformis used for aquaculture

Abstract

The present application belongs to the technical field of aquaculture, and particularly relates to a siphon type water plant planting device, which comprises a water pipe, a plurality of groups of water plant planting devices, a safety drainage device, and a self-suction water pump device connected with the safety drainage device; the water plant planting device comprises a water plant outlet, a barb disc device, and a spherical screen device; the safety drainage device comprises an opening arranged at the upper end of the water pipe, a protective screen arranged at the opening of the safety water pipe, a safety zone check valve arranged at the rear end of the protective screen in the water pipe, a self-suction water pump connected with the right end of the water pipe, a water outlet arranged at the bottom of the water pipe and corresponding to the position of the safety zone check valve, and a total drainage pipe arranged below the water pipe and in communication with the water pipe and corresponding to each water outlet. The device is convenient to move, relatively light, and can be temporarily separated from the water surface, has a good root fixing effect on Hydrilla verticillata, effectively ensures high planting efficiency and high quality of the water plant, and enables aquaculture farmers to achieve yield protection and yield increase.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aquaculture, and particularly relates to a siphon type water plant planting device for water farming. BACKGROUND

[0002] The Hydrilla verticillata is a perennial submerged herbaceous plant of the Hydrocharitaceae family, which widely exists in the water area of rivers, lakes and ponds, is cold-resistant and high-temperature-resistant, has strong regenerative ability and pollution resistance, and has strong adaptability to water eutrophication and can grow in seriously polluted water, and thus has the effect of purifying water. Therefore, the Hydrilla verticillata is often used for water farming, can provide a three-dimensional space for shrimps and crabs to climb, has the effects of increasing the breeding density, providing a molting hiding place, avoiding natural enemies and isolating the same species from fighting and killing each other. Meanwhile, the Hydrilla verticillata can perform photosynthesis during the day, absorbs carbon dioxide and discharges oxygen, is a natural “oxygen generator”, and can reduce or even stop the use of an oxygen increasing machine during a period of sufficient sunlight, so as to save electricity expenses, and is also a natural green feed for shrimps and crabs. The Hydrilla verticillata belongs to “pseudorhizome” plants, and has a specific gravity slightly lighter than water, and the stems are fragile and easy to break, but the broken branches can regenerate into a whole plant. Therefore, in the actual water farming, for example, in the case of breeding Macrobrachium rosenbergii, a pond water is discharged to about 20-30 cm, the Hydrilla verticillata is cut into segments with a length of about 15-20 cm, about 20 roots are taken as a small bunch, and the Hydrilla verticillata is uniformly planted at the bottom of the pond. The broken branches start to root and grow about 5-7 days later, and the water level is deepened in time according to the growth speed of the plants. About a month after the planting, when the Hydrilla verticillata has a length of about 60 cm and the water level reaches about 70 cm, the seedlings can be released. In the breeding process, the water level needs to be deepened in time according to the growth speed of the Hydrilla verticillata to about 1-1.2 m. When the breeding period ends and the aquatic products reach the market specifications, the water level of the pond is lowered to an appropriate depth, the Hydrilla verticillata is pulled out by the roots, is stacked on the side of the pond, and is left to be exposed to the sun and weathered, so as to be scraped and caught in the pond.

[0003] Growth characteristics of the Hydrilla verticillata:

[0004] 1. The Hydrilla verticillata is thick and has strong regenerative ability, and the broken branches can regenerate. The growth speed is fast, and the length can be increased by 50-60 cm in a month when the temperature is high in summer. In the season with low temperature, the length can also be increased by 30 cm per month as long as the temperature is above 15 degrees.

[0005] 2. The density of the Hydrilla verticillata is slightly lower than that of water, and the Hydrilla verticillata can float on the water surface and grow normally without soil.

[0006] 3. The whole plant does not contain woody fibers, and becomes powdery after being exposed to the sun and weathered. The place where the Hydrilla verticillata is stacked for a long time cannot be found. Unlike crops such as wheat, rice and weeds, the Hydrilla verticillata does not leave woody fiber materials after being exposed to the sun and dried.

[0007] 4, the stem is brittle and easy to break, because it does not contain lignocellulose, so the rhizome is relatively fragile.

[0008] 5, during the day, it can absorb carbon dioxide and release oxygen by photosynthesis, but at night, it will consume oxygen and release carbon dioxide.

[0009] 6, can only be away from water for a short time, and if the time is too long, especially when the sun is shining, it is easy to wither and even die.

[0010] As we all know, Macrobrachium rosenbergii is a large freshwater shrimp, which is delicious and nutritious, with low fat and high protein, and is loved by people all over the world. But the general yield per mu is only 400 kg / mu / crop, and the annual yield is basically not more than 1000 kg / mu, so the price is relatively high. If the yield is improved, it will be supplied to consumers at a more affordable price, which will help reduce prices and improve people's living standards.

[0011] The characteristics of Macrobrachium rosenbergii are as follows:

[0012] 1, fierce temperament, omnivorous, often preys on insects and small fish, even cannibalism, strong territorial awareness, and likes to fight.

[0013] 2, afraid of light and like shade. It does not like bright light and likes to hide in dark places.

[0014] 3, the cultivation period is 4 months / crop, and after 2 months of cultivation, the growth rate will become particularly fast in the third month, especially for male shrimps.

[0015] 4, fry can be produced all year round, that is, it can be cultured all year round.

[0016] 5, the life span can reach two years, and the body weight can reach 600 grams.

[0017] Therefore, there are many advantages of using Hydrilla verticillata for aquaculture, but there are also many disadvantages.

[0018] At present, the disadvantages of traditional planting Hydrilla verticillata at the bottom of the pond are:

[0019] 1, reduces the turnover rate of the pond. Each cultivation of aquatic products requires one month of planting of water grass, and if the weather is cold, the growth of water grass is slower, so the planting time will be longer.

[0020] 2, before the fry is planted, it is easy to produce plant-eating and meat-eating pests and wild miscellaneous fish:

[0021] The herbivorous insect pests, for example, the leaf rollers, in the seasons with suitable or even higher temperature, a large number of water grass-eating insects will lay eggs and hatch in the pond, and the hatched larvae will eat a large amount of water hyacinth, causing planting failure. The carnivorous insect pests, for example, the dragonfly, in the seasons with suitable or even higher temperature, will lay eggs in the pond, and the dragonfly larvae are very fierce carnivorous insects, often preying on fish, shrimp and insects larger than themselves in water, so if a large number of dragonfly larvae exist in the pond when the fry is released, the fry will be greatly damaged, causing great loss to the breeders. The pond water source is generally river water source, and aquatic fish larvae and fish eggs are inevitably mixed into the pond water, which will hatch and grow before the fry is released, and then compete with the Procambarus clarkii for feed after the fry is released, resulting in low feed utilization rate and increased breeding cost, and if the carnivorous fish, the Procambarus clarkii will directly reduce production.

[0022] 3. The thickness of the pond mud has certain requirements, otherwise it cannot be planted. Generally, the thickness of the pond mud for planting water hyacinth needs to be about 20-30 cm, otherwise the roots of the water hyacinth cannot hold the bottom of the pond, and the whole plant is easy to float, thus losing the role of three-dimensional space, and the water grass after floating will be sunburned and die in the high temperature season, causing water pollution. Therefore, the water hyacinth is not suitable for planting in the pond with thin or no mud, for example, the pond formed by the abandoned stone mining field, the bottom of which is stone.

[0023] 4. During the breeding process after the fry is released, the water hyacinth will die due to some factors, and it is impossible to replant the grass, which will cause the breeders to reduce production and loss. For example, weeds will grow around the pond, and the herbicide is not used properly and flows into the pond; the long-time heavy rain weather, the drainage speed cannot keep up with the precipitation speed, and the water level is too deep for a long time, causing the water grass to die; and the excessive use of the algae-killing drug, etc.

[0024] 5. Uncontrolled growth hinders water circulation and oxygen exchange, leading to deterioration of the pond bottom and frequent, labor-intensive intervention. In actual aquaculture ponds, there is a large amount of carbon dioxide exhaled by aquatic organisms, excrement, feed, and organic matter from the pond mud. The abundant nutrients in *Hydrilla verticillata* cause it to proliferate rapidly, resulting in overgrown vegetation throughout the pond. This further impedes water and oxygen flow, especially at night when aquatic plants and shrimp / crabs consume oxygen. The oxygen-rich water from aerators cannot exchange with the oxygen-deficient water in the aquatic plants in time, causing aquatic organisms to float to the surface, resulting in slow growth or even death, causing significant losses. Under normal circumstances, the dissolved oxygen in the water is sufficient for aquatic plants to primarily rely on aerobic respiration at their roots. However, when the external environment is oxygen-deficient, anaerobic respiration becomes dominant. Aerobic respiration uses oxygen to produce nutrients that are fixed within the aquatic plants. Once the roots lack oxygen, the aquatic plants can only resort to anaerobic respiration to survive, consuming their own organic matter to maintain their life activities and converting it into alcohol. This leads to the withering of the bottom rhizomes, thinning of the stems, shortening of the roots, and eventually rotting, causing the aquatic plants to float to the surface. Therefore, aquaculture farmers often need to periodically create a cross-shaped path for the aquatic plants in the pond, dividing the entire pond into four sections to allow for sufficient water exchange, but this is time-consuming and labor-intensive.

[0025] 6. In aquaculture waters, *Hydrilla verticillata* is intolerant of deep water, exhibiting a top-heavy, bottom-light appearance. Its slender stems are covered with whorled leaves, allowing the entire plant to photosynthesize. In natural waters, *Hydrilla verticillata* typically grows in shallow or clear water. However, aquaculture waters usually require algae cultivation and fertilization, resulting in water transparency of only 15-20 cm. Therefore, the deeper the pond, the lower the transparency. Near the surface, the abundant sunlight and dissolved oxygen allow for excellent photosynthesis, leading to vigorous growth, a dark green color, and robust stems and leaves. However, as the water deepens and transparency decreases, the whorled leaves become sparser, and the stems turn white or even yellow. Over time, by the time the plant reaches the bottom, only a small portion of the rootstock remains, resulting in a mushroom-like morphology in aquaculture ponds. This is because the bottom of the pond receives poor sunlight, and the upper plants block the light, preventing the bottom plants from photosynthesizing. As nutrients produced by the upper plants are transported to the lower plants, a large portion of the nutrients are consumed during the transport process due to the plant's length. Therefore, nutrients and oxygen cannot reach the area near the roots. Consequently, the roots and stems near the bottom of the pond are weak and much sparser than the stems and leaves on the surface. This makes the upper part of the plant, being large and having high buoyancy, while the lower part is weak and has low tensile strength, prone to breaking and floating upwards.

[0026] 7, cannot be divided into ponds. Aquaculture has the method of dividing into ponds, because the water products are small in size and have low oxygen demand when they are young, so the number of young seedlings that can be accommodated in a unit of cubic water body is large, and the feed utilization rate of high-density breeding will also be increased, achieving the effect of saving feed. But as the breeding time gets longer, the individual will grow bigger and bigger, and the oxygen consumption will also increase. When it reaches a certain individual standard, the pond space dissolved oxygen can no longer support so many individuals to grow, and high density will cause fighting and cannibalism for water products with strong territorial awareness. Therefore, it is necessary to divide into ponds to increase the individual breeding space. The benefit of dividing into ponds is that it can fully utilize the growth characteristics of aquaculture and greatly improve the turnover rate of the pond to maximize yield. But if the pond is planted with Hydrilla verticillata, it cannot be moved because it is planted at the bottom of the pond and cannot be replanted immediately after being removed. Therefore, it cannot be divided into ponds, thereby restricting yield.

[0027] 8, cannot be improved. During the breeding of aquatic products, because the water grass grows wildly, the water body cannot be fully exchanged, the bait is excessive, and the feces discharged by the aquatic products cannot be degraded in time, leading to the deterioration of the bottom of the pond, the production of harmful substances to the aquatic products, and the inhibition of the growth and development of the aquatic products, and even the phenomenon of stealing death. At this time, it is necessary to sprinkle medicine (such as lime water) to improve the bottom of the pond. But because the Hydrilla verticillata covers the surface of the pond, the medicine cannot sink to the bottom of the pond. Therefore, the bottom of the pond cannot be improved.

[0028] 9, cannot be sold in batches or even retailed, but can only be marketed in whole ponds. Aquaculture often has the practice of catching big and leaving small, which can sell a part of the aquatic products that reach the marketing specifications when the market price is good, and leave the smaller ones for further breeding. This can not only maximize profits, but also can recover part of the cost during the entire breeding cycle to reduce the risk of breeding. But because the Hydrilla verticillata is planted at the bottom of the pond, the aquatic products bred are hidden in the grass, and the Macrobrachium rosenbergii cannot be caught in the cage, so it cannot be netted.

[0029] Therefore, it is urgent to develop a siphon type water grass planting device for aquatic breeding of Hydrilla verticillata, which is movable, relatively light, can be temporarily away from water, and can be planted into grass. SUMMARY

[0030] The purpose of the present application is to overcome the shortcomings of the prior art, and to disclose a siphon type water grass planting device for aquatic breeding of Hydrilla verticillata, which is movable, relatively light, can be temporarily away from water, and can be planted into grass. In addition, the root fixing effect of Hydrilla verticillata is good, which fully takes into account the growth characteristics of Hydrilla verticillata, effectively ensures the high planting efficiency and high planting quality of the water grass, and enables the aquaculture farmers to achieve yield increase and protection, providing a solid guarantee and a epoch-making significance for aquaculture.

[0031] In order to achieve the above technical purpose, the present application is realized according to the following technical scheme:

[0032] The siphon type water plant planting device for aquaculture comprises a water pipe with a left end part being sealed, a plurality of groups of water plant planting devices, a safety drainage device and a self-suction water pump device connected with the safety drainage device are sequentially arranged along the axial direction of the water pipe from left to right, the water plant planting device comprises a water plant outlet opening arranged on the upper part of the water pipe, a plurality of barb disc devices capable of hooking the roots of the water plants for planting are fixed in the inner part of the water pipe, and a spherical screen device is arranged at the rear end of the barb disc; the plurality of barb discs are arranged at intervals; a planting area check valve is arranged at the rear position of the spherical screen device in the inner part of the water pipe; a planting area drainage opening is arranged at the bottom of the water pipe corresponding to the outlet of the planting area check valve; a sealing baffle is arranged at the rear end position of the drainage opening in the inner part of the water pipe; the safety drainage device comprises an opening arranged at the upper end part of the water pipe; a protective net for preventing aquatic products and sundries from entering is arranged at the opening of the safety water pipe; a safety area check valve is arranged at the rear end part of the protective net in the inner part of the water pipe; the right end part of the water pipe is connected with the self-suction water pump through a connecting pipe joint device and a reinforced hose; a safety area water outlet is also arranged at the bottom of the water pipe corresponding to the position of the safety area check valve; a total drainage pipe is arranged below the water pipe and is in communication with each planting area drainage opening and the safety area water outlet; the opening valve pressure of the planting area check valve of each water plant planting device from left to right is sequentially increased and is smaller than the opening valve pressure of the safety area check valve; height-adjustable supporting leg devices are arranged at the left end part and the right end part of the water pipe; and floating buoys connected by ropes are arranged at the left end part and the right end part of the water pipe.

[0033] As a further improvement of the above-mentioned technology, the water pipe is a PVC water suction pipe, the outer diameter of the pipe is 110 mm, the inner diameter is 103 mm, the length of the axial opening of the water plant outlet opening is 15 cm, and the radial opening arc width is 11 cm.

[0034] As a further improvement of the above-mentioned technology, the barb disc device comprises a bottom disc ring arranged at the bottom and a flat conical needle-shaped barb extending forwardly and fixed to the inner wall of the bottom disc ring, a plurality of capillary barbs are arranged on the flat conical needle-shaped barb, the flat conical needle-shaped barb and the plane of the bottom disc ring form an angle of 45 degrees, and the barb disc device is a funnel-shaped one-way barb disc.

[0035] As a further improvement of the above technology, the outer diameter of the bottom ring is 103 mm, the thickness is 2 mm, and the axial width of the water pipe is 20 mm. The inner wall of the bottom ring is in the shape of a flat conical needle with a length of 40 mm. The inner wall of the bottom ring is provided with a countersunk screw hole, and the disc device is fixed on the inner wall of the PVC water pipe by a countersunk screw.

[0036] As a further improvement of the above technology, the spherical screen is a spherical screen made of stainless steel wire with a diameter of 3 mm. The diameter of the spherical screen is 102 mm. The screen grid size of the left half of the spherical screen is larger, and the screen grid size of the right half is smaller. A stainless steel wire ring with the largest circumference is provided in the middle of the spherical screen to divide the sphere into left and right hemispheres. The spherical screen is fixed inside the PVC water pipe by two long fastening screws longitudinally and transversely, and the stainless steel wire ring with the largest circumference of the screen ball is clamped in a cross shape, so as to fix the spherical screen inside the PVC water pipe.

[0037] As a further improvement of the above technology, the planting area check valve and the safety area check valve have the same structure, which are check valves with integrated structure, including a cylindrical check valve seat fixed on the inner wall of the water pipe and a check valve flap hinged inside the cylindrical check valve seat and capable of sealing with the cylindrical check valve seat. The upper ends of the check valve flap are provided with hinged shafts which are hinged to the inner wall of the check valve seat. The hinged shafts divide the upper area and the lower area of the check valve flap in a ratio of 1:6. A stainless steel angle iron is fixed on the inner wall of the bottom of the planting water pipe corresponding to the closed part of the check valve flap. Magnets are provided on the check valve flap and the mounting angle iron for magnetic attraction. The edges of the check valve flap are provided with a ring of sealing soft glue, and the magnets are treated for rust and breakage prevention.

[0038] As a further improvement of the above technology, the outer diameter of the check valve seat is 103 mm, and the wall thickness of the check valve seat is 2 mm. The check valve flap is a circular flap with a diameter of 95 mm and a thickness of 3 mm.

[0039] As a further improvement of the above technology, the drain port of the water pipe bottom is a circular opening with a diameter not less than 70.4 mm, which is fixedly connected with the main drain pipe through a three-way patch with a diameter of 110 mm to 75 mm and a sealing rubber pad.

[0040] As a further improvement of the above technology, the sealing baffle is a circular baffle with a diameter of 103 mm and a thickness of 3 mm, which is clamped in a cross shape longitudinally and transversely inside the water pipe by two long screws, or is fixed in front of and behind the baffle by several screws to fix the sealing baffle.

[0041] As a further improvement of the above technology, the reinforced hose is a hose with a spiral steel wire ring built therein.

[0042] Compared with the prior art, the application has the following advantages:

[0043] (1) The water grass planting device can directly plant into grass by growing the water spinach through the siphon of the self-suction pump, thereby saving the additional waiting time for planting grass in the traditional method, effectively improving the turnover rate of the pond, and greatly improving the breeding efficiency of the aquaculture farmers. Taking the planting of the Macrobrachium rosenbergii seedling as an example, the traditional breeding method needs to plant grass in the pond for 1 month and breed for 4 months, a total of 5 months, and 2.4 crops can be put on the market in a year. The water grass planting device can save the planting time, and the period for breeding one crop only needs 4 months, and 3 crops can be put on the market in a year, and the turnover rate of the pond is increased by 25% per year.

[0044] (2) The water grass planting device effectively solves the problem of pest damage in the traditional planting of water spinach, because it is directly planted into grass and can be immediately planted with seedlings, eliminating the opportunity for pests to breed in the pond during the one-month planting period of the traditional water grass planting method. Because the individual size of the Macrobrachium rosenbergii is only about 0.75-1 cm during the seedling period, the individual size is small and the self-defense ability is weak, but the individual size will grow to about 3 cm after about 30 days of breeding. Because the Macrobrachium rosenbergii is fierce and has a miscellaneous diet, it will prey on pests in the pond, thereby effectively protecting the yield.

[0045] (3) The water grass planting device can be planted without being limited by the bottom of the pond, so that the Macrobrachium rosenbergii can be bred in ponds with different substrates, thereby greatly expanding the breeding area and achieving the effect of increasing yield. Because the water grass can be planted on the water grass planting device, it can be moved and adjusted in height according to actual needs, so it can be planted with water spinach regardless of the depth, thickness, sandiness, mudiness, or even hard stone bottom, effectively solving the problem that the traditional planting of water spinach has certain requirements for the thickness of the pond mud.

[0046] (4) The water grass planting device easily solves the problem of easy breakage of the traditional planting of water spinach. If part or even all of the water spinach dies during breeding, if the water quality is a problem, the water can be drained and replaced, and the grass can be immediately replanted, thereby playing a role in protecting the yield and ensuring the quality of the water grass planting.

[0047] (5) The water plant planting device of the present application limits the horizontal development of the water plant because the water plant is planted in the device and the grass outlet is basically higher than the surface of the sediment, and the number of devices placed in the pond can be more or less according to the needs, and the density can be adjusted, effectively solving the problem of water circulation at the bottom of the pond, thereby reducing the probability of deterioration of the bottom material, and both normal growth and prevention of wild growth of Hydrilla verticillata can be achieved, effectively solving the problem of insufficient photosynthesis of traditional planted Hydrilla verticillata in aquaculture water;

[0048] (6) The water plant planting device of the present application effectively solves the problem of traditional planted Hydrilla verticillata in deep water in aquaculture water, and the device adopts a periodic siphon method, which can suck relatively fresh large stems and leaves into the planting area, and the rhizome part near the screen is rotten due to lack of light and water oxygen, and is finally discharged out of the device due to compression, thereby solving the problem of floating after the water plant is broken;

[0049] (7) The water plant planting device of the present application can be temporarily taken out of water. Because the device is made of plastic material, which is light in weight, when the pond needs to be cleaned, two people pull the two end ropes to make the device leave the bottom of the pond, and then move about 1 meter to one side, so that the water plant flows to the other side, and then the device can be lifted to the water surface and dragged to the side of the pond, and the water attached to the water plant is drained, and then the device can be lifted to another pond for temporary placement.

[0050] (8) The water plant planting device of the present application can be divided into ponds, which greatly improves the annual yield of Procambarus clarkii. Taking the bidding of coarse seedlings as an example, traditional cultivation of Procambarus clarkii requires 5 months per crop, and 2.4 crops per year can be cultivated. Compared with 15 mu of pond, the traditional cultivation method directly raises the yield of 15 mu x 2.4 crops / year x 400 kg / mu = 14400 kg / year / mu; and the device is used for pond division, according to the characteristics of Procambarus clarkii, the cultivation period is 4 months per crop, and the growth rate becomes particularly fast in the third month after two months of cultivation, 5 mu of pond is used as a mother pond, the seedling amount is 200% of the traditional direct cultivation, and the seedlings are concentrated for two months, and then they are divided into two other 5 mu of pond for two months of cultivation, at the same time, the mother pond is immediately seeded, and the mother pond and the child pond are synchronized, when the shrimp in the child pond can be cleaned and marketed, the semi-finished shrimp in the mother pond can be divided into the child pond for further cultivation. Although the child pond also produces 400 kg / mu, the child pond can produce one crop of shrimp every two months, which means that the child pond can produce 6 crops of shrimp per year after the first year of using the device, and the yield is 10 mu x 6 crops / year x 400 kg / mu = 24000 kg / year / mu, which is 66.66% higher than the yield of the traditional direct cultivation method.

[0051] (9) The water plant growing device can improve the pond bottom, and when the bottom has signs of deterioration, the water plants can be moved to one side of the pond, half of the medicine is sprayed into the vacant side, and after the medicine is settled in the pond bottom, the water plants are moved to the area where the medicine has been sprayed, and the medicine is sprayed into the area where no medicine has been sprayed. After the medicine is settled, the water plants are restored to the original placement state.

[0052] (10) The water plant growing device can breed larger commercial shrimps. Since traditional breeding of Macrobrachium rosenbergii is to plant Hydrilla verticillata on the bottom of the pond, only direct fry mode is adopted for breeding, and when the breeding cycle is completed, the pond breeding density is basically at the upper limit. Because Macrobrachium rosenbergii is fierce and has a miscellaneous diet, if forcibly breeding larger commercial shrimps, it will inevitably cause excessive crowding and mutual fighting and killing, resulting in that the yield per mu is not increased, and the breeding cycle is longer, and the cost of electricity and feed is increased, which is not worth the loss. Therefore, there are few large Macrobrachium rosenbergii above 150 grams sold on the market. However, if the water plant growing device is used for breeding, the problem of pond division can be solved, the life of Macrobrachium rosenbergii can reach two years, and the weight can reach 600 grams. The pond can be divided many times during the life cycle of Macrobrachium rosenbergii, so that breeding of large commercial shrimps can be realized.

[0053] (11) The water plant growing device is safe and reliable, and no electric power equipment is used in the water in the whole device, which will not cause potential danger to people and aquatic products. During use, a small amount of water plants and residues are inevitably stuck between the check valve flap and the water pipe, causing the check valve to be unable to close. However, each check valve has a strong magnet for suction. Even if the check valve cannot be closed for a moment, the water plants will be cut off and the check valve will be closed again after a long time due to the continuous compression of the check valve magnet suction force and the factors of oxygen deficiency and accelerated decay of the water plants in the pipe. The next use will not be affected. BRIEF DESCRIPTION OF DRAWINGS

[0054] The application will be described in detail below in combination with the drawings and specific embodiments:

[0055] Figure 1 is a structure diagram of the water plant growing device according to the application;

[0056] Figure 2 is a structure diagram of the water plant growing device according to the application;

[0057] Figure 3 is a structure diagram of the safety drainage device according to the application;

[0058] Figure 4 is a front structure diagram of the barb disc device according to the application;

[0059] Figure 5 This is a schematic diagram of the spherical screen structure in this invention. Detailed Implementation

[0060] like Figures 1 to 5 As shown, a siphon-type aquatic plant planting device for *Hydrilla verticillata* used in aquaculture includes a water pipe 1 sealed at its left end, several sets of aquatic plant planting devices 2 arranged sequentially from left to right along the axial direction of the water pipe 1, a safety drainage device 3, and a self-priming water pump 4 connected to the safety drainage device 3. The aquatic plant planting device 2 includes an aquatic plant outlet 21 with an opening in the upper part of the water pipe 1, several barbed disc devices 22 fixed inside the water pipe 1 for hooking the roots of aquatic plants for planting, and a device placed on the barbed disc. The spherical screen device 23 at the rear end of the device 22 has several barbed discs spaced apart. A planting area check valve 5 is located inside the water pipe 1 behind the spherical screen device 23. A planting area drain outlet 11 is located at the bottom of the water pipe 1 corresponding to the outlet of the planting area check valve 5. A sealing baffle 6 is located at the rear end of the water pipe 1 behind the planting area drain outlet 11. The safety drainage device 3 includes a safety opening 31 located at the upper end of the water pipe 1. The safety opening 31 of the safety water pipe 1 is equipped with… A protective net 32 ​​is provided to prevent aquatic products and debris from entering. A safety check valve 7 is installed inside the water pipe 1 at the rear end corresponding to the protective net 32. The right end of the water pipe 1 is connected to a self-priming water pump 4 via a connecting pipe joint device 9 and a reinforced hose 10. An outlet is also provided at the bottom of the water pipe 1 corresponding to the position of the safety check valve 7. A main drain pipe 20 is located below the water pipe 1, and the main drain pipe 20 is interconnected with the drainage outlets 11 of each planting area and the safety outlet 12 of the safety drainage device 3. The opening pressure of the check valve 5 in the planting area of ​​each aquatic plant planting device 2 increases in a stepwise manner from left to right, and is less than the opening pressure of the check valve 7 in the safety area. The water pipe 1 is provided with height-adjustable support foot device 30 near the left and right ends. The height-adjustable support foot device 30 can be made by two support rods that can be staggered and crossed inside the water pipe 1. In addition, for easy observation and handling, the left and right ends of the water pipe 1 are provided with buoys 50 connected by ropes 40.

[0061] In this invention, the water pipe 1 is a PVC water suction pipe 1 with an outer diameter of 110mm and an inner diameter of 103mm. The aquatic plant outlet 21 has an axial opening length of 15cm and a radial opening arc width of 11cm.

[0062] like Figure 4As shown, the barb disc device 22 includes a bottom disc ring 221 placed on the bottom and a flat conical needle-shaped barb 222 fixed on the inner wall of the bottom disc ring 221 and extending forward, and a plurality of capillary barbs are provided on the flat conical needle-shaped barb 222, the flat conical needle-shaped barb 222 forms a 45-degree angle with the plane on which the bottom disc ring 221 is located, and the barb disc device 22 is a funnel-shaped one-way barb disc as a whole, and the bottom disc ring 221 is fixed on the inner wall of the water pipe 1.

[0063] The outer diameter of the bottom disc ring 221 is 103 mm, the thickness is 2 mm, and the width along the axis of the water pipe 1 is 20 mm, the length of the flat conical needle-shaped barb 222 on the inner wall of the bottom disc ring 221 is 40 mm, and the inner wall of the bottom disc ring 221 is provided with a countersunk screw hole, which is fixed on the inner wall of the PVC water pipe 1 by a countersunk screw, and the structure is firm.

[0064] As shown in Figure 1 , Figure 2 and Figure 5 , the spherical screen device 23 is a spherical screen made of a stainless steel wire with a diameter of 3 mm, the spherical screen has a spherical body with a diameter of 102 mm, the screen grid size of the left half 231 of the spherical screen device 23 is larger, and the screen grid size of the right half 232 is smaller, a stainless steel wire ring 233 with the largest circumference is provided at the middle of the spherical screen device 23 to divide the spherical body into the left half 231 and the right half 232, and the spherical screen device 23 is fixed in the PVC water pipe 1 by two long fastening screws longitudinally and transversely penetrating the PVC water pipe 1 and cross-shaped clamping the stainless steel wire ring 233 with the largest circumference of the spherical screen, so that the spherical screen can be tightly fixed in the PVC water pipe 1, and the structure is firm.

[0065] As shown in Figure 2 , the planting area check valve 5 is a check valve with an integrated structure, which includes a cylindrical check valve seat 51 fixed on the inner wall of the water pipe and a check valve flap 52 hinged inside the check valve seat 51 and capable of sealingly cooperating with the cylindrical check valve seat 51, the upper two ends of the check valve flap 52 are provided with hinged convex shafts 54 hinged on the inner wall of the check valve seat, the hinged convex shafts 54 divide the upper area and the lower area of the check valve flap 52 into a ratio of 1:6, and the check valve flap 52 and the mounting angle iron are both provided with magnets with magnetic attraction, the edge of the check valve flap 52 is provided with a ring of sealing soft rubber to ensure the tight sealing effect when the planting area check valve 5 is closed, and the magnets are both treated with anti-rust and anti-breaking protection.

[0066] In this invention, the outer diameter of the check valve seat 51 is 103mm, the wall thickness of the check valve seat 51 is 2mm, and the check valve cover 52 is a circular cover with a diameter of 95mm and a thickness of 3mm.

[0067] Similar to the above, the structure of the safety zone check valve 7 is the same as that of the planting zone check valve 5. It also includes a check valve seat 71, a check valve cover 72, and a stainless steel angle iron 73 that can magnetically attract the check valve cover 72 and the corresponding stainless steel angle iron 73. The working principle of the safety zone check valve 7 is also completely the same as that of the planting zone check valve 5, except that the valve opening pressure is different, which will not be described in detail here.

[0068] like Figure 1 , Figure 2 The drainage outlet 11 at the bottom of the water pipe 1 is a circular opening with a diameter of not less than 70.4 mm. It is fixedly connected to the main drainage pipe 20 through a tee sealing piece with a diameter of 110 mm to 75 mm and a sealing gasket.

[0069] like Figure 1 As shown, the sealing baffle 6 is a circular baffle with a diameter of 103mm and a thickness of 3mm. It is clamped inside the water pipe 1 by two long fixing screws in a cross shape in the longitudinal and transverse directions. In addition, it can also be fixed to the front and back of the baffle with several screws to fix the sealing baffle 6.

[0070] In this invention, the reinforced hose 10 is a hose with a built-in spiral steel wire ring, which has high strength and is easy to match with a self-priming water pump.

[0071] like Figure 1 As shown, in this embodiment, five sets of aquatic plant planting devices 2 are used, which are AE sections in sequence. The structures of the five sets of aquatic plant planting devices 2 are the same. The difference is that the opening pressure of the check valve 5 in each planting area increases from small to large from left to right. The pressures are 8kg, 10kg, 12kg, 14kg and 16kg respectively, and the opening pressure of the safety zone check valve 7 is 18kg.

[0072] The following details the working process of the siphon-type aquatic plant planting device described in this invention:

[0073] 1. The siphon type water plant planting device is placed in the shallow water area at the edge of the pond, all the water plant outlets 21 are immersed, the water plant outlets 21 are arranged at about 15-20 cm from the water surface, the connection of the self-priming water pump 4 is confirmed, the self-priming water pump 4 is started, at this time, the pressure borne by the check valve 5 in each planting area in the A, B, C, D and E sections and the safety area check valve 7 in the F section of the safety drainage device 3 is equal, but with the increase of the pressure, the planting area check valve 5 in the A section opens first because the magnetic force is the smallest, at this time, the pressure of the planting area check valve 5 in the B, C, D and E sections and the safety area check valve 7 in the F section instantaneously decreases, and still remains in the closed state, when the water flows from the water plant outlet 21 in the A section into the inside of the water pipe 1, a bundle of rhizome parts of the Hydrilla verticillata with a diameter of about 6-7 cm is placed at the water plant outlet 21, under the action of the relatively strong water flow, the water plant is sucked into the water pipe 1, with more water plants entering the water pipe 1, the clogging area in the water pipe 1 is larger, the suction force is stronger with the larger clogging area, until the spherical screen device 23 is completely clogged by the water plants, at this time, because the water flow is too slow or even no water flow, the planting area check valve 5 in the A section is closed under the action of the mutual attraction of the magnets and the self-gravity, then the water plants in the water pipe 1 are pressed and clamped by the barb disc device 22, so that the water plants cannot float out of the pipe, and a better root fixing and planting effect is achieved.

[0074] At the same time, the pressure of the planting area check valve 5 in the B, C, D and E sections and the safety area check valve 7 in the F section increases, because the magnetic force of the planting area check valve 5 in the B section is smaller, the B section opens first, and the water plants in the B section are planted by repeating the method of the A section, and the planting methods of the C, D and E sections are the same, so that the water plant planting work is completed.

[0075] In the embodiment, the F section is a protection section for protecting the self-priming water pump 4, and is not used for planting water plants, if there is no protection of the F section, when the water plants in the ABCDE sections are planted, the water pipe 1 is clogged and no water flows into the self-priming water pump 4, so that the core of the self-priming water pump 4 is easily burned, therefore, in order to protect the self-priming water pump 4, the F section is a section without planting water plants.

[0076] 2. If individual water plants have poor growth or are missing during the breeding period, the siphon type water plant planting device can be lifted and dragged to the edge of the pond, the water plants are supplemented and then placed back to the original position.

[0077] The present application is not limited to the above-mentioned embodiments, various modifications or changes of the present application do not deviate from the spirit and scope of the present application, if the modifications and changes belong to the scope of the claims and the equivalent technology of the present application, the present application also means to include the modifications and changes.

Claims

1. A siphon type water plant growing device for Hydrilla verticillata used for aquaculture, characterized by: The water pipe is sealed at the left end, and a plurality of groups of water plant planting devices, a safety drainage device, and a self-suction water pump device connected with the safety drainage device are sequentially arranged along the axial direction of the water pipe from left to right. The water plant planting device comprises a water plant outlet opening arranged on the upper part of the water pipe, a plurality of barbed disc devices fixed in the water pipe and capable of hooking the roots of the water plants for planting, and a spherical screen device arranged at the rear end of the barbed disc, and the barbed disc devices are arranged at intervals. The safety drainage device comprises a safety opening arranged at the upper end of the water pipe, a protective net arranged at the safety opening of the water pipe to prevent aquatic products and sundries from entering, a safety zone check valve arranged at the rear end of the protective net in the water pipe, and a connection pipe joint device arranged at the right end of the water pipe to connect the water pipe with the self-suction water pump through a reinforced hose.

2. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized by: The water pipe is a PVC water pipe with an outer diameter of 110 mm and an inner diameter of 103 mm.

3. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The barbed disc device comprises a bottom disc and a flat conical needle-shaped barb fixed on the inner wall of the bottom disc and extending forward, and a plurality of capillary barbs are arranged on the flat conical needle-shaped barb.

4. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 3, characterized by: The outer diameter of the bottom disc is 103 mm, the thickness is 2 mm, and the axial width of the bottom disc is 20 mm.

5. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The spherical screen is a spherical screen made of a stainless steel wire with a diameter of 3 mm. The spherical screen is fixed in the water pipe by two long fastening screws longitudinally and transversely penetrating the water pipe and cross-shaped clamping the stainless steel wire ring with the largest circumference of the spherical screen.

6. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The planting area check valve and the safety area check valve have consistent structures, and are check valves of integrated structures, which include a cylindrical check valve seat fixed on the inner wall of the water pipe and a check valve flap hinged to the inside of the cylindrical check valve seat and capable of sealingly cooperating with the cylindrical check valve seat, upper ends of the check valve flap are provided with hinged convex shafts hinged to the inner wall of the check valve seat, the hinged convex shafts divide the upper area and the lower area of the check valve flap into a ratio of 1:6, and the check valve flap and the mounting angle iron are both provided with magnets magnetically attracted to each other, and the check valve flap edge is provided with a ring of sealing soft rubber.

7. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 6, characterized in that: The outer diameter of the check valve seat is 103 mm, the wall thickness of the check valve seat is 2 mm, and the check valve flap is a circular flap with a diameter of 95 mm and a thickness of 3 mm.

8. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The water pipe bottom drainage port is a circular opening with a diameter of not less than 70.4 mm, which is fixedly connected with the general drainage pipe through a tee-shaped leakage repair piece with a diameter of 110 mm to 75 mm and a sealing rubber gasket.

9. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The sealing baffle is a circular baffle with a diameter of 103 mm and a thickness of 3 mm, which is clamped in the longitudinal and transverse directions in a cross shape in the water pipe through two long fixing screws, or is fixed on the front and back of the sealing baffle through a plurality of screws.

10. The siphon type water plant growing device for Hygrophila difformis for aquaculture according to claim 1, characterized in that: The reinforced hose is a hose with a spiral steel wire ring arranged inside.

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