An eel pond automatic sieving system for separating sizes and its sieving method

Abstract

This application relates to the technical field of eel sorting, and specifically discloses a system for automatically screening the size of eel ponds and its screening method. The system for automatically screening the size of eel ponds includes a fry pond, a concentration pond, a first transportation mechanism, a screening device, a sub-storage device with multiple transfer storage parts, a second transportation mechanism, and multiple breeding ponds, which are connected in sequence. The height of the fry pond is greater than that of the concentration pond, so that the eel fry in the fry pond can flow into the concentration pond by gravity. The first transportation mechanism is configured to transport the eel fry in the concentration pond to the screening device. The screening device is configured to automatically divide the eel fry into multiple grades according to size and transport them to different transfer storage parts according to grades. The second transportation mechanism is connected to the multiple transfer storage parts of the sub-storage device and is set to receive the eel fry flowing out of one transfer storage part each time and transport them to the corresponding breeding pond. This system can automatically screen eel fry, saving manpower and reducing the screening cost.

Description

Technical Field

[0001] This application relates to the technical field of eel sorting, and more specifically, to a system for automatically screening the size of eels in a pond and a screening method therefor. Background Art

[0002] After a period of breeding, the weight of eel fry increases and the density increases. The bottom of the pond is severely polluted due to residual bait, excrement, etc. Timely sub-culturing can enable the breeding pond to be cleaned and disinfected in time. In addition, during the breeding process of eel fry, although the stocked eel fry have the same specifications, due to their different feeding intensities and food competition abilities, after a period of breeding, individual differences will appear, and as the breeding time extends, this difference will become larger and larger. If not sub-cultured in time, there will often be a group of eels that have passed the growth period but are still very small in size, affecting the breeding effect. Therefore, doing a good job in sub-culturing is an important measure to increase production in eel breeding. The sub-culturing of eels can usually be arranged in a timely manner according to the feeding rate and the growth and weight increase of adult eels. For example, when the eel fry are bred for 45 to 60 days, they can be screened and sub-cultured. Generally, after reaching a specification of 10 tails / kg, only pond division is done and no more screening is carried out. The related technology for screening eel fry is manual selection, which requires a lot of manpower and financial resources and has a high screening cost. Summary of the Invention

[0003] In order to improve the problem that the related technology for screening eel fry is manual selection, which requires a lot of manpower and financial resources and results in a high screening cost, this application proposes a system for automatically screening the size of eels in a pond and a screening method therefor.

[0004] In a first aspect, this application proposes a system for automatically screening the size of eels in a pond and adopts the following technical solutions.

[0005] A system for automatically screening the size of eels in a pond includes a fry pond, a centralized pond, a first transportation mechanism, a screening device, a storage device with multiple transfer storage parts, a second transportation mechanism, and multiple breeding ponds that are connected in sequence. The height of the fry pond is greater than that of the centralized pond; the first transportation mechanism is configured to be able to transport the eel fry in the centralized pond to the screening device. The screening device is configured to be able to automatically divide the eel fry into multiple grades according to size and transport them to different transfer storage parts. The second transportation mechanism is connected to the multiple transfer storage parts of the storage device and is set to receive the eel fry flowing out of one transfer storage part each time and transport them to the corresponding breeding pond.

[0006] By adopting the above technical solution, under the action of gravity, eel fry of different sizes in the fry pond are first sent into the concentration pond. Most of the water overflows from the concentration pond, thus concentrating the eel fry to improve the efficiency of transporting eel fry. The first transportation mechanism transports the eel fry in the concentration pond to the screening device. Under the action of gravity, the eel fry are automatically screened into multiple grades according to their sizes and automatically transported into different transfer storage parts according to the grades, so that each grade can collect more fry and then be transported separately. In the transfer storage part, it can also be used to wash the eel fry with water to remove excrement, feed, etc., so as to improve the cleanliness of the eel fry finally input into the breeding pond. The structure of the second transportation mechanism can be the same as that of the first transportation mechanism. Through the above settings, the eel fry can be automatically screened, the screening efficiency is improved, manpower is saved, and the screening cost is reduced.

[0007] As an improvement to the system for automatically screening the sizes of the eel pond, the first transportation mechanism includes a support base, a loading part, a driver, a receiving part and a conveying part; the loading part for loading eel fry is slidably installed on the support base, and the receiving part is fixed on the support base; the loading part can move up or down under the drive of the driver, and after rising above the receiving part, automatically pour the eel fry into the receiving part; the eel fry in the receiving part, under the action of its own gravity, first flow into the conveying part and then flow into the screening device along the conveying part.

[0008] By adopting the above technical solution, since the height of the concentration pond is less than that of the fry pond, in order to keep the heights of all sections of the system within a suitable range, the eel fry flowing out of the concentration pond need to be lifted first and then automatically poured into the screening device according to gravity. This part is carried out by the first transportation mechanism capable of lifting and lowering movements.

[0009] As an improvement to the system for automatically screening the sizes of eel fry in the eel pond, the loading member includes a box body, a bottom pipe, a mask, an inner rail, a rope, a slider and an outer rail; the bottom surface of the box body is shaped such that it smoothly converges from various places to a lowest point, and the lowest point is located at the bottom of one side surface of the box body; an opening is provided on the side surface adjacent to the lowest point, and the bottom pipe is communicatively connected to the outer side surface of the opening in a fitting manner; a through hole is also provided on the side surface, and the rope passes through the through hole; the two ends of the rope are respectively connected to the mask and the slider; the inner rail is vertically fixed inside the side surface; the mask is slidably installed in the inner rail and is close to the side surface; the outer rail is vertically fixed outside the side surface; the slider is slidably installed in the outer rail; a fixing block for docking with the slider is provided on the support base. The mass of the mask is greater than that of the slider, so that the mask can shield the inner side surface of the opening by its own weight. The slider and the fixing block are configured such that after the bottom pipe completely rises above the receiving member, the slider abuts against the fixing block and stops, and the loading member is driven to continue rising, so that the slider pulls the mask away from the opening.

[0010] By adopting the above technical solution, the eel fry can converge to the bottom pipe at the lowest point of the box body. After the box body is driven to drive the bottom pipe to rise above the receiving member, the slider is blocked and cannot continue to rise. Thus, during the continuous upward movement of the box body, the relative movement between the box body and the slider causes the mask to move away from the opening, so that the eel fry in the box body pour into the receiving member. Under the action of its own gravity, the eel fry in the receiving member first flows into the conveying member and then flows into the screening device along the conveying member to be screened according to size.

[0011] As an improvement to the system for automatically screening the sizes of eel fry in the eel pond, a movable plate is provided on the surface of the receiving member facing the loading member, and a first clamping member is provided on the movable plate; a second clamping member is provided on the surface of the loading member facing the receiving member; after the bottom pipe completely rises above the receiving member, the second clamping member abuts against the first clamping member, and during the continuous upward movement of the bottom pipe, the second clamping member drives the first clamping member to rise synchronously.

[0012] By adopting the above technical solution, after the bottom pipe on the box body rises above the receiving member and during the continuous upward movement of the bottom pipe, the bottom pipe and the receiving member will be separated by a certain distance, so that the eel fry flowing out of the bottom pipe are likely to spill out and not all flow into the receiving member. Therefore, a movable plate that can move synchronously is designed to rise synchronously with the bottom pipe after rising to a certain height, so that the eel fry are not likely to spill out, improving the yield of the eel fry.

[0013] As an improvement to the system for automatically screening the size of eel ponds, the screening device includes multiple layers of sieve plates from top to bottom; the lowermost layer of the sieve plate includes a receiving part and a diversion trough connected to each other, and each of the remaining layers of sieve plates includes a receiving part, a screening part, and a diversion trough connected in sequence; the sieve plate is longitudinally inclined from the high-position receiving part to the low-position diversion trough, and the diversion trough is also laterally inclined. The receiving part of the lower layer of the sieve plate is arranged below the screening part of the upper layer of the sieve plate.

[0014] By adopting the above technical solution, each layer of the sieve plate of the screening device is inclined, and the diversion trough is also inclined, making full use of gravity to screen eel fry, saving energy and achieving the purpose of automatically screening eel fry. The eel fry passes through each layer of the sieve plate. After each screening, the larger eel fry cannot pass through the screening part and flows into the diversion trough and automatically flows out, while the smaller fry leaks through the screening part and is received and screened again, realizing the automatic screening of fry according to size.

[0015] As an improvement to the system for automatically screening the size of eel ponds, the storage and distribution device includes a transfer water tank and a switch; each of the transfer storage components is installed in the transfer water tank; each of the transfer storage components has a multi-mesh structure; the switch is arranged at the end of each of the transfer storage components.

[0016] By adopting the above technical solution, eel fry of multiple size grades can be temporarily stored in the transfer water tank, and can be washed of excrement, etc., so as to send the clean fry into the breeding pond. Since the amount of fry of each grade is small after grading, setting up this transfer water tank can also wait until the fry of the corresponding grade accumulates to a certain amount before transporting. Each time, one grade of fry is transported through the switch, improving the transportation efficiency.

[0017] As an improvement to the system for automatically screening the size of eel ponds, the system for automatically screening the size of eel ponds further includes an inclined ditch, the outlets of multiple transfer storage components are connected to the ditch, and the outlet of the ditch leads to the second transportation mechanism.

[0018] By adopting the above technical solution, all the eel fry discharged from the transfer storage components can be received through one ditch and conveyed to the second transportation mechanism, saving path setting and reducing manufacturing and management costs.

[0019] As an improvement to the system for automatically screening the size of eel ponds, the system for automatically screening the size of eel ponds further includes a partitioning mechanism, the second transportation mechanism is connected to the partitioning mechanism, and the partitioning mechanism is provided with multiple switches connected to multiple breeding ponds one by one.

[0020] By adopting the above technical solution, a partitioning mechanism is set up to be connected to multiple breeding ponds one by one, saving the cost of pipeline laying.

[0021] As an improvement to the system for automatically screening the sizes of eels in the eel pond, the switch includes a horizontal pipe and a vertically inserted pipe that is hermetically connected to the horizontal pipe and can be unplugged.

[0022] By adopting the above technical solution, the liquid level can be set to be lower than the vertical pipe, and the horizontal pipe is arranged at the bottom. When closed, water or the eel surface cannot enter the vertical pipe. After unplugging the vertical pipe, both water and eels can flow out through the horizontal pipe, playing the role of a switch, with a simple and effective structure.

[0023] In a second aspect, the present application also proposes a method for screening eels, and the following technical solution is adopted.

[0024] A method for screening eels, which uses the above system for automatically screening the sizes of eels in the eel pond to screen eels; the method includes:

[0025] Open the fry pond, and under the action of gravity, the eel fry in the fry pond are injected into the centralized pond;

[0026] Open the centralized pond, and under the action of gravity, the eel fry in the centralized pond are sent into the first transportation mechanism;

[0027] The first transportation mechanism transports the loaded eel fry to the screening device;

[0028] Under the action of gravity, the eel fry pass through the screening device, are divided into multiple grades according to size, and are transported to different transfer storage parts according to grades;

[0029] Each time one of the transfer storage parts is opened, so that the eel fry of one grade all flow into the second transportation mechanism under the action of their own gravity;

[0030] The second transportation mechanism inputs all the eel fry of this grade into the corresponding grade of the breeding pond, thereby screening the eel fry according to size grades.

[0031] By adopting the above technical solution, the gravity is fully utilized to transport the eel fry, saving manpower and material resources. First, the fry are centralized and then transported, improving the transportation efficiency. In the screening device, the fry are also automatically screened according to size by gravity. After screening, they are collected and cleaned in the transfer device. After aggregating a certain weight of clean fry, they are respectively transported to the corresponding grade of breeding ponds. The screening process of this system requires less manpower and financial resources compared to manual screening, with a low screening cost.

[0032] In summary, the system for automatically screening the sizes of eels in the present application and its screening method have the following beneficial effects:

[0033] By setting up a fry pond, a concentration pond, a first transportation mechanism, a screening device, a storage device with multiple transfer storage parts, a second transportation mechanism, and multiple breeding ponds connected in sequence, under the action of gravity, the eel fry of different sizes in the fry pond are first sent into the concentration pond. Most of the water overflows from the concentration pond, thus concentrating the eel fry to improve the efficiency of transporting eel fry. The first transportation mechanism transports the eel fry in the concentration pond to the screening device. Under the action of gravity, the eel fry are automatically screened into multiple grades according to their sizes and automatically transported into different transfer storage parts so that each grade can collect more fry and then be transported separately. In the transfer storage part, it can also be used to wash the eel fry with water to remove excrement, feed, etc., so as to improve the cleanliness of the eel fry finally input into the breeding pond. The structure of the second transportation mechanism can be the same as that of the first transportation mechanism. Through the above settings, the eel fry can be automatically screened, the screening efficiency is improved, manpower is saved, and the screening cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall structure diagram of a system for automatically screening the sizes of eel ponds.

[0035] Figure 2 It is Figure 1 a second perspective structure diagram of the system for automatically screening the sizes of eel ponds.

[0036] Figure 3 It is Figure 1 a third perspective structure diagram of the system for automatically screening the sizes of eel ponds.

[0037] Figure 4 It is Figure 3 an enlarged view of area A of the system for automatically screening the sizes of eel ponds.

[0038] Figure 5 It is Figure 1 a fourth perspective structure diagram of the system for automatically screening the sizes of eel ponds.

[0039] Figure 6 It is Figure 5 an enlarged view of area B of the system for automatically screening the sizes of eel ponds.

[0040] Figure 7 It is Figure 1 a fifth perspective structure diagram of the system for automatically screening the sizes of eel ponds.

[0041] Figure 8 It is Figure 7 an enlarged view of area C of the system for automatically screening the sizes of eel ponds.

[0042] Figure 9 It is Figure 7Enlarged view of area D of the eel pond automatic sieving system according to size.

[0043] Figure 10 For Figure 7 Enlarged view of area E of the eel pond automatic sieving system according to size.

[0044] Reference numerals: fry pond 1, concentration pond 2, first transport mechanism 3, sieving device 4, sub-storage device 5, transfer storage member 501, second transport mechanism 6, breeding pond 7, support base 301, loading member 302, drive 303, receiving member 304, conveying member 305, box body 3021, bottom pipe 3022, mask 3023, inner rail 3024, rope 3025, slider 3026, outer rail 3027, opening 3028, fixed block 3011, movable plate 3041, first clamping member 3042, second clamping member 3029, semi-circular groove 3043, sieve plate 401, receiving portion 4011, sieving portion 4012, diversion groove 4013, transfer water tank 502, switch 503, ditch 8, zoning mechanism 9, horizontal pipe 5031, vertical pipe 5032. Detailed implementation manner

[0045] The following specifically describes the eel pond automatic sieving system according to size and its sieving method with reference to the accompanying drawings.

[0046] Please refer to Figure 1 , an eel pond automatic sieving system according to size, including a fry pond 1, a concentration pond 2, a first transport mechanism 3, a sieving device 4, a sub-storage device 5 having a plurality of transfer storage members 501, a second transport mechanism 6 and a plurality of breeding ponds 7 connected in sequence.

[0047] The height of the fry pond 1 is greater than that of the concentration pond 2, so that the eel fry in the fry pond 1 can flow into the concentration pond 2 by gravity.

[0048] The first transport mechanism 3 is configured to be able to transport the eel fry in the concentration pond 2 to the sieving device 4.

[0049] The sieving device 4 is configured to be able to automatically divide the eel fry into multiple grades according to size and transport them into different transfer storage members 501 according to grades.

[0050] The second transport mechanism 6 is connected to the plurality of transfer storage members 501 of the sub-storage device 5 and is arranged to receive the eel fry flowing out of one transfer storage member 501 each time and transport them into the corresponding breeding pond 7.

[0051] This system makes full use of the gravity to screen eel fry more automatically. The eel fry of different sizes in the fry pond 1 are first sent into the concentration pond 2. Most of the water overflows from the concentration pond 2, thus concentrating the eel fry to improve the efficiency of transporting eel fry. The first transportation mechanism 3 transports the eel fry in the concentration pond 2 to the screening device 4. Under the action of gravity, the eel fry are automatically screened into multiple grades according to their sizes and automatically transported to different transfer storage parts 501 according to the grades, so that each grade can collect more fry and then be transported separately. In the transfer storage part 501, it can also be used to wash the eel fry with water to remove excrement, feed, etc., so as to improve the cleanliness of the eel fry finally input into the breeding pond 7. The structure of the second transportation mechanism 6 can be the same as that of the first transportation mechanism 3. Through the above settings, the eel fry can be automatically screened, the screening efficiency is improved, the labor is saved, and the screening cost is reduced.

[0052] Such as Figure 2 , specifically, the first transportation mechanism 3 may include a support base 301, a loading part 302, a driver 303, a receiving part 304 and a conveying part 305. The support base 301 may be a vertical steel frame structure. The loading part 302 is used to receive the eel fry flowing out of the concentration pond 2 and send the eel fry into the receiving part 304. The receiving part 304 may be a structure such as a steel trough. The conveying part 305 may be a section of pipeline connected to the receiving part 304 and used to further transport the eel fry. The driver 303 may include a motor, an output shaft and a rope. The motor is installed on the support base 301 to drive the output shaft to rotate. The rope wound around the output shaft continues to wind onto the output shaft or leave the output shaft. This rope is also connected to the loading part 302, so that the driver 303 can drive the loading part 302 to move up and down.

[0053] A specific preferred structure of the first transportation mechanism 3 is that the loading part 302 for loading eel fry is slidably installed on the support base 301 and can stably transport the eel fry. The receiving part 304 is fixed on the support base 301 and can stably receive the eel fry. The loading part 302 can move up or down under the drive of the driver 303, and after rising above the receiving part 304, automatically pour the eel fry into the receiving part 304. The eel fry in the receiving part 304, under the action of its own gravity, first flows into the conveying part 305 and then flows into the screening device 4 along the conveying part 305.

[0054] The above-mentioned first transport mechanism 3 is set up to first lift the fry and then use the fry to flow into the screening device 4 by its own weight, instead of directly inputting the fry in the concentrated pool 2 into the screening device 4 by gravity. This is because the height of the concentrated pool 2 is smaller than that of the fry pool 1. In order to prevent the height difference between each section of the system from being too large to increase the construction cost and reduce the transportation efficiency, the eel fry flowing out of the concentrated pool 2 must first be lifted and then automatically poured into the screening device 4 by gravity, so as to facilitate the fry to return to the breeding pool 7 with the same height as the fry pool 1 in the later process.

[0055] like Figure 3 and Figure 4 After the loading part 302 rises to the receiving part 304, an optional structure for automatically pouring the eel fry into the receiving part 304 is: Figure 5 and Figure 6 The loading unit 302 includes a box 3021, a bottom tube 3022, a mask 3023, an inner rail 3024, a rope 3025, a slider 3026, and an outer rail 3027. The bottom surface of the box 3021 is shaped to smoothly converge to a lowest point, located at the bottom of one side elevation of the box 3021. An opening 3028 is provided on the side elevation near the lowest point. The bottom tube 3022 is connected to the outer surface of this opening 3028. The front end of the bottom tube 3022 extending from the box 3021 is a flexible tube. A through hole is also provided above the opening 3028 on the side elevation, through which the rope 3025 passes. The rope 3025 is connected at both ends to the mask 3023 and the slider 3026, respectively. Inner rail 3024 is vertically fixed to the inside of the side elevation. Cover 3023 slides within inner rail 3024, preferably close to or in close contact with the side elevation to prevent the eel fry from leaking out. Outer rail 3027 is vertically fixed to the outside of the side elevation. Slider 3026 slides within outer rail 3027. Support base 301 is provided with a fixed block 3011 that engages slider 3026. When loading member 302 rises above receiving member 304, fixed block 3011 abuts slider 3026, opening opening 3028. The mass of the mask 3023 is greater than that of the slider 3026. For example, the mass of the mask 3023 is 2 to 3 times that of the slider 3026. This allows the mask 3023 to cover the inner surface of the opening 3028 by its own weight. After the bottom tube 3022 has completely risen to the top of the receiving part 304, the slider 3026 abuts the fixed block 3011 and stops rising. The loading part 302 continues to rise, and the slider 3026 pulls the mask 3023 away from the opening 3028.

[0056] The bottom surface of the above-mentioned box body 3021 is shaped such that it smoothly converges to a lowest point everywhere, enabling the eel fry to converge to the opening 3028 at the lowest point of the box body 3021. After driving the box body 3021 to drive the bottom pipe 3022 to rise above the receiving member 304, the slider 3026 is blocked by the fixing block 3011 of the support seat 301 and cannot continue to rise. Thus, during the continuous upward movement of the box body 3021, the relative movement between the box body 3021 and the slider 3026 causes the mask 3023 to leave the opening 3028, enabling the eel fry in the box body 3021 to pour into the receiving member 304 through the bottom pipe 3022 from the opening 3028. The eel fry in the receiving member 304, under the action of its own gravity, then flows into the conveying member 305 and then flows into the screening device 4 along the conveying member 305 for screening by size.

[0057] As Figure 7 and Figure 8 , in an improved embodiment, after driving the box body 3021 to rise above the receiving member 304, the box body 3021 and the bottom pipe 3022 continue to rise, causing the bottom pipe 3022 and the receiving member 304 to be separated by a certain height. The eel fry flowing out of the bottom pipe 3022 is likely to spill from the side. Therefore, in this embodiment, a movable plate 3041 closely attached to the main body of the receiving member 304 is further provided on the side of the receiving member 304 opposite to the loading member 302. A first clamping member 3042 is provided on the back side of the movable plate 3041, and a second clamping member 3029 is provided on the side of the box body 3021 opposite to the receiving member 304. The first clamping member 3042 can be a section of crossbar. The second clamping member 3029 can be an L-shaped metal blade that can support the first clamping member 3042. After the bottom pipe 3022 just completely rises above the receiving member 304, the second clamping member 3029 abuts against the first clamping member 3042. During the continuous upward movement of the bottom pipe 3022, the second clamping member 3029 drives the first clamping member 3042 to rise synchronously, that is, the movable plate 3041 rises synchronously with the bottom pipe 3022 after rising to a certain height, making it difficult for the eel fry to spill out and improving the productivity of the eel fry.

[0058] The movable plate 3041 can be further improved as follows: a semicircular groove 3043 is opened at the upper edge, and the semicircular groove 3043 can adaptively accommodate the bottom pipe 3022 to improve the degree to which the movable plate 3041 wraps the bottom pipe 3022 and further reduce the probability of the eel fry spilling from the bottom pipe 3022. Since the front end of the bottom pipe 3022 is a section of flexible pipe, during the upward movement of the bottom pipe 3022, the flexible pipe first deforms and abuts against the movable plate 3041. After rising to the semicircular groove 3043, the flexible pipe bounces open and straightens and enters the inner side of the movable plate 3041, that is, above the receiving member 304, to prevent spilling.

[0059] A hose can also be provided at the end of the output pipeline of the centralized pool 2. This hose can extend into the box body 3021 of the first transportation mechanism 3 and can also be folded when the box body 3021 rises, thus not hindering the rise of the box body 3021.

[0060] Optionally, two sets of first transportation mechanisms 3 with the same structure are provided in this automatic size screening system. Each set of first transportation machines has a receiving part 304. The eel fry in each receiving part 304 enter the screening device 4 through their respective conveying parts 305 under the action of gravity.

[0061] Such as Figure 9 , in this automatic size screening system, optionally, the screening device 4 includes multiple layers of sieve plates 401 from top to bottom, for example, four layers of sieve plates 401. The lowermost layer of sieve plate 401 includes a connecting receiving part 4011 and a diversion groove 4013. Each upper layer of sieve plate 401 includes a receiving part 4011, a screening part 4012, and a diversion groove 4013 connected in sequence. The sieve plate 401 is longitudinally inclined from the high-position receiving part 4011 to the low-position diversion groove 4013, and the diversion groove 4013 is also laterally inclined. The receiving part 4011 of the lower layer of sieve plate 401 is arranged below the screening part 4012 of the upper layer of sieve plate 401. Due to the inclined setting of each layer of sieve plate 401 and the inclined setting of the diversion groove 4013, the gravity is fully utilized to screen the eel fry. When the eel fry pass through each layer of sieve plate 401, the larger eel fry cannot pass through the screening part 4012 and flow into the diversion groove 4013 and automatically flow out, while the smaller fry leak through the screening part 4012 and are received and then enter the screening part 4012 to be re-screened, realizing the function of automatically multi-level screening fry by size.

[0062] Such as Figure 7 and Figure 10 , in this automatic size screening system, optionally, the sub-storage device 5 includes a transfer water pool 502 and a switch 503. Each transfer storage part 501 is installed in the transfer water pool 502. Multiple sides of each transfer storage part 501 have a multi-mesh structure to exchange dirt and water with the middle-mounted water pool, improving the cleanliness of the fry. Each transfer storage part 501 is inclined, and a switch 503 is provided at the end of the transfer storage part 501 for discharging the fry. The above settings enable eel fry of multiple size grades to be temporarily stored in the transfer water pool 502, and can be washed for excrement, etc., so as to send the clean fry into the breeding pool 7. Since the amount of fry of each grade is small after grading, setting this transfer water pool 502 can also wait until the fry of the corresponding grade accumulate to a certain amount and then be transported. Each time a grade of fry is transported through the switch 503, the transportation will not interfere, and the transportation efficiency is relatively high.

[0063] In this automatic eel - size screening system, optionally, the eel - pond automatic size - screening system further includes a ditch 8 that is inclined from high to low. The outlets of multiple transfer storage members 501 are connected to the ditch 8, and the outlet of the ditch 8 leads to the second transportation mechanism 6. A pipeline is provided at the end of the ditch 8, and a hose is provided at the end of the pipeline. The hose can extend into the fish - carrying device of the second transportation mechanism 6. During the rising process of the fish - carrying device, the hose can be folded so as not to interfere with the rising of the fish - carrying device. The structure of the second transportation mechanism 6 can be the same as that of the first transportation mechanism 3. The hose in this embodiment can be a silica gel tube.

[0064] Through a ditch 8, it can receive the fry discharged from one transfer storage member 501 each time and convey them to the second transportation mechanism 6. After multiple transports, it can receive all the eel fry discharged from the transfer storage members 501. This design saves path construction and reduces manufacturing and management costs.

[0065] In this automatic eel - size screening system, optionally, the eel - pond automatic size - screening system further includes a partitioning mechanism 9, such as a partitioning tank. The second transportation mechanism 6 is connected to the partitioning mechanism 9. The partitioning mechanism 9 is provided with multiple switches 503, each of which is connected to multiple culture ponds 7 one by one, saving the cost of pipeline laying. The switch 503 can be a combination of a horizontal pipe 5031 and a plug - in vertical pipe 5032 that is hermetically connected to the horizontal pipe 5031. Pulling out the vertical pipe 5032 realizes opening, and connecting the vertical pipe 5032 realizes closing. The liquid level height is set to be less than that of the vertical pipe 5032, and the horizontal pipe 5031 is arranged at the bottom. Then, when it is closed, water or eels cannot enter the vertical pipe 5032, and after pulling out the vertical pipe 5032, both water and eels can flow out through the horizontal pipe 5031, playing the role of the switch 503, with a simple and effective structure. A bent pipe can be provided between the horizontal pipe 5031 and the vertical pipe 5032. Pulling out both the vertical pipe 5032 and the bent pipe realizes opening, and installing the vertical pipe 5032 and the bent pipe realizes closing.

[0066] The switch 503 can also be provided at the outlets of the fry pond 1 and the concentration pond 2 to intercept or discharge the fry.

[0067] It should be noted that the switch 503 can also be provided in each culture pond 7 to intercept or discharge the fry. The culture pond 7 and the fry pond 1 can also share a summary pipe, and the summary pipe is connected to the concentration pond 2, so that the eels cultured in the culture pond 7 for a period of time can be screened by size again.

[0068] In the second aspect, the present application also proposes a method for screening eels and adopts the following technical solutions.

[0069] A method for screening eels uses the above - mentioned eel - pond automatic size - screening system to screen eels; the method includes:

[0070] Open the fry pond 1. Under the action of gravity, the eel fry in the fry pond 1 are injected into the centralized pond 2;

[0071] Open the centralized pond 2. Under the action of gravity, the eel fry in the centralized pond 2 are sent into the first transportation mechanism 3;

[0072] The first transportation mechanism 3 first lifts the loaded eel fry to a certain height and then conveys them to the screening device 4 according to gravity;

[0073] Under the action of gravity, the eel fry pass through the screening device 4, are divided into multiple grades according to size, and are conveyed to different transfer storage parts 501 according to grades;

[0074] Each time a transfer storage part 501 is opened, so that the eel fry of one grade all flow into the second transportation mechanism 6 under the action of their own gravity;

[0075] The second transportation mechanism 6 inputs all the eel fry of this grade into the corresponding grade of breeding pond 7, so as to screen the eel fry according to size grades.

[0076] The above screening method makes full use of gravity to transport eel fry, saves manpower and material resources, first concentrates the fry and then transports them, improves the transportation efficiency. In the screening device 4, it also automatically screens the fry according to size by gravity. After screening, they are collected and cleaned in the transfer device. After gathering a certain weight of clean fry, they are then transported to the corresponding grade of breeding pond 7 respectively. In the screening process of this system, compared with manual screening, it does not require much manpower and financial resources, and the screening cost is low.

[0077] The above is only the preferred implementation mode of this application. The protection scope of this application is not limited to the above embodiments. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of this application should also be regarded as falling within the protection scope of this application.

Claims

1. An automatic eel pond sieving system for separating sizes, characterized in that, It comprises a fry pond (1), a concentration pond (2), a first transport mechanism (3), a screening device (4), a storage device (5) having a plurality of transfer storage parts (501), a second transport mechanism (6) and a plurality of breeding ponds (7) connected in sequence; The fry pond (1) is higher than the central pond (2); the first transport mechanism (3) is configured to transport the eel fry in the central pond (2) to the screening device (4); The screening device (4) is configured to automatically classify the eel fry into multiple grades according to size, and automatically transport them to different transfer dumps (501) according to the grades; The second transport mechanism (6) is connected to the plurality of transfer storage parts (501) of the storage device (5), and is configured to receive the eel fry flowing out of one transfer storage part (501) each time and transport the eel fry to the corresponding breeding pond (7); The first transport mechanism (3) includes a support seat (301), a loading member (302), a driver (303), a receiving member (304) and a conveying member (305); the loading member (302) for loading eel fry is slidably mounted on the support seat (301), and the receiving member (304) is fixed on the support seat (301); the loading member (302) can be driven by the driver (303) to move upward or downward, and after rising to the receiving member (304), the eel fry is automatically poured into the receiving member (304); the eel fry in the receiving member (304) first flows into the conveying member (305) under the action of its own gravity, and then flows into the screening device (4) along the conveying member (305); The loading part (302) comprises a box body (3021), a bottom tube (3022), a mask (3023), an inner rail (3024), a rope (3025), a slider (3026) and an outer rail (3027); the bottom surface of the box body (3021) is in a shape that smoothly converges from all places to a lowest point, and the lowest point is located at the bottom of a side elevation of the box body (3021); an opening (3028) is provided on the side elevation adjacent to the lowest point, and the bottom tube (3022) is adapted to be connected to the outer side of the opening (3028); a through hole is also provided on the side elevation, The rope (3025) passes through the through hole; the two ends of the rope (3025) are respectively connected to the mask (3023) and the slider (3026); the inner rail (3024) is vertically fixed to the inner side of the side elevation; the mask (3023) is slidably installed in the inner rail (3024) and close to the side elevation; the outer rail (3027) is vertically fixed to the outer side of the side elevation; the slider (3026) is slidably installed in the outer rail (3027); and a fixing block (3011) is provided on the support seat (301) for docking the slider (3026); The mass of the mask (3023) is greater than that of the slider (3026), so that the mask (3023) can shield the inner side of the opening (3028) by its own weight.

2. The eel pond automatic sieving system according to claim 1, wherein The slider (3026) and the fixed block (3011) are configured such that after the bottom tube (3022) rises completely above the receiving member (304), the slider (3026) abuts against the fixed block (3011) and stops, and the loading member (302) is driven to continue rising, so that the slider (3026) pulls the mask (3023) away from the opening (3028).

3. The eel pond automatic sieving system according to claim 2, characterized in that, A movable plate (3041) is provided on one side of the receiving member (304) relative to the loading member (302), and a first engaging member (3042) is provided on the movable plate (3041), and a second engaging member (3029) is provided on one side of the loading member (302) relative to the receiving member (304); after the bottom tube (3022) rises completely above the receiving member (304), the second engaging member (3029) abuts against the first engaging member (3042), and during the continuous rising process of the bottom tube (3022), the second engaging member (3029) drives the first engaging member (3042) to rise synchronously.

4. The eel pond automatic sieving system for separating sizes according to claim 1, characterized in that, The screening device (4) includes multiple layers of sieve plates (401) from top to bottom; the lowermost layer of the sieve plate (401) includes a receiving portion (4011) and a diversion groove (4013) connected to each other, and each of the remaining layers of the sieve plate (401) includes a receiving portion (4011), a screening portion (4012), and a diversion groove (4013) connected in sequence; the sieve plate (401) is longitudinally inclined from the high-position receiving portion (4011) to the low-position diversion groove (4013), and the diversion groove (4013) is also laterally inclined; The receiving portion (4011) of the lower layer of the sieve plate (401) is provided below the screening portion (4012) of the upper layer of the sieve plate (401).

5. The eel pond automatic sieving system according to claim 1, characterized in that The sub-storage device (5) includes a transfer water tank (502) and a switch (503); each of the transfer storage members (501) is installed in the transfer water tank (502); each of the transfer storage members (501) has a multi-mesh structure; the switch (503) is provided at the end of each of the transfer storage members (501).

6. The eel pond automatic sieving system for separating sizes according to claim 5, characterized in that, The system for automatically screening the size of eel ponds further includes an inclined ditch (8), the outlets of multiple transfer storage members (501) are connected to the ditch (8), and the outlet of the ditch (8) leads to the second transportation mechanism (6).

7. The eel pond automatic sieving system for separating sizes according to claim 1, characterized in that, The system for automatically screening the size of eel ponds further includes a zoning mechanism (9), the second transportation mechanism (6) is connected to the zoning mechanism (9), and the zoning mechanism (9) is provided with multiple switches (503) which are connected to multiple culture ponds (7) one by one.

8. The eel pond automatic sieving system for separating sizes according to any one of claims 5-7, characterized in that, The switch (503) includes a horizontal pipe (5031) and a pluggable vertical pipe (5032) hermetically connected to the horizontal pipe (5031).

9. A method for screening eels, characterized in that, Using the system for automatically screening the size of eel ponds according to any one of claims 1-8 to screen eels; the method includes: Open the fry pond (1), and under the action of gravity, the eel fry in the fry pond (1) are injected into the centralized pond (2). Open the centralized pond (2), and under the action of gravity, the eel fry in the centralized pond (2) are sent into the first transportation mechanism (3). The first transportation mechanism (3) transports the loaded eel fry to the screening device (4). Under the action of gravity, the eel fry pass through the screening device (4), are divided into multiple grades according to size, and are transported to different transfer storage parts (501) according to grades. Each time one of the transfer storage parts (501) is opened, so that the eel fry of one grade all flow into the second transportation mechanism (6) under the action of their own gravity. The second transportation mechanism (6) inputs all the eel fry of this grade into the corresponding grade of the breeding pond (7), thereby screening the eel fry according to size grades.

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