Monopterus albus fertilized egg artificial incubation system and automatic siphoning method thereof

Abstract

The invention discloses a ricefield eel fertilized egg artificial incubation system and an automatic siphoning method thereof. A high-level water tank automatically supplements water through a floating ball valve, and intermittent water supply is achieved under the triggering of a water level through an inverted-U-shaped siphon; the annular loop pipeline uniformly distributes water flow to the hatching barrels connected in parallel; an inverted-cone-shaped flow guide cover is arranged in the barrel to buffer water flow and is matched with a 20-mesh flat-bottom net and an anti-escape net cover to form an egg particle suspension area. The artificial hatching system for the fertilized eggs of the finless eels runs completely depending on gravity, simulates the natural hatching environment of the finless eels, has the advantages of zero energy consumption, low maintenance and high survival rate, and effectively solves the problem of large-scale production of finless eel fries, and the hatching capacity of a single barrel reaches 100,000.

Description

Technical Field

[0001] This invention belongs to the field of aquatic breeding technology, specifically relating to an artificial incubation system for fertilized eel eggs and its automatic siphon method. Background Technology

[0002] The swamp eel (Monopterus albus) is an important representative fish species belonging to the order Synbranchiformes, family Synbranchidae, and genus Monopterus. It is one of the specialty freshwater fish species whose aquaculture development has been very rapid in my country in recent years. During the development of the swamp eel aquaculture industry, the shortage of seedlings has become a prominent issue, necessitating the artificial mass breeding of swamp eel seedlings.

[0003] In their natural environment, fertilized eel eggs rely on foam nests built by the parent eels to maintain a suspended state for incubation. Existing incubation devices are mostly electrically driven systems, which suffer from high energy consumption, strong water flow disturbance, and complex maintenance, making it difficult to simulate the micro-flow suspension environment required by eel eggs without violent agitation. There is an urgent need to develop an energy-efficient and stable artificial incubation system that simulates natural incubation conditions to solve these problems. Summary of the Invention

[0004] This invention provides an artificial incubation system for fertilized eel eggs and its automatic siphon method. It is an artificial incubation system for eel eggs based on the principle of gravity siphon. The system achieves stable suspension and incubation of fertilized eggs through a non-powered circulating water design, which can solve the problems existing in the prior art.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] This invention provides an artificial incubation system for fertilized eel eggs, comprising an automatic siphon system in a high-level water tank, a ring-loop water supply pipe (7), and an incubation tank system. The automatic siphon system in the high-level water tank includes a high-level water tank (1), a water injection pipe (2) controlled by a float valve, an inverted U-shaped siphon pipe (6), and a water level triggering mechanism (5). The water injection pipe (2) controlled by the float valve is located at the upper right corner of the high-level water tank (1). The water level triggering mechanism (5) is connected to the float valve (3) via a lever (4). The inverted U-shaped siphon (6) is located on the left side of the high-level water tank (1). The inverted U-shaped siphon (6) includes an ascending section pipe (6-1) and a descending section pipe (6-2). The ascending section pipe (6-1) is located inside the high-level water tank (1), and the descending section pipe (6-2) is connected to the ring-loop water supply pipe (7). The hatching bucket system includes multiple hatching buckets (8) connected in parallel, and all multiple hatching buckets (8) are connected to the ring-loop water supply pipe (7).

[0007] In an optional embodiment of the present invention, the elevated water tank (1) is a rectangular PE material water tank with a length, width and height of 40cm×25cm×60cm and a volume of 60L; the height difference between the bottom of the elevated water tank (1) and the overflow outlet (14) of the incubation bucket (8) is 110cm.

[0008] In an optional embodiment of the present invention, the water injection pipe (2) is a DN40 PVC pipe, the float valve (3) is a DN40 lever-type float valve, the water injection velocity is 0.69m / s, and the flow rate is 0.9L / s.

[0009] In an optional embodiment of the present invention, the inverted U-shaped siphon (6) is an inverted U-shaped pipe structure made of DN25 PVC pipe. The vertex position (6-3) of the inverted U-shaped siphon (6) is 50cm away from the bottom of the high-level water tank (1), the height of the siphon rising section is 14cm, and the port of the rising section pipe (6-1) is 36cm away from the bottom of the high-level water tank.

[0010] In an optional embodiment of the present invention, the annular loop water supply pipe (7) is made of DN25 PVC pipe to form a closed loop water supply pipe, ensuring that the water supply pressure of each hatching tank (8) is the same, and 10 DN25×20 PVC tee structures (7-1) are connected in parallel to supply water to 10 hatching tanks (8).

[0011] In an optional embodiment of the present invention, each hatching tank (8) is provided with an inverted cone-shaped flow guide (10) and a flat-bottomed filter (11) at the bottom, and an escape-proof net cover (13) is provided at the top of each hatching tank (8); the flat-bottomed filter (11) is a 20-mesh stainless steel flat-bottomed mesh, and the escape-proof net cover (13) is a 20-mesh nylon escape-proof net cover; an overflow hole (14) is opened 10cm from the top surface of each hatching tank (8); the flat-bottomed filter (11) is used to reduce the accumulation of eel eggs, and the upward flow is formed by the diffusion of the inverted cone-shaped flow guide (10). The eggs are kept suspended between the escape-proof net cover (13) and the flat-bottomed filter (11). When the water level rises to the position of the overflow hole (14), the surface water is discharged and impurities are carried away.

[0012] In an optional embodiment of the present invention, the cone angle of the inverted conical guide shroud (10) is 110°, which is used to disperse the incoming water flow, reduce the disturbance of the incoming water flow, and prevent the eggs from being violently agitated.

[0013] In one optional embodiment of the present invention, the overflow hole (14) has a diameter of 25 mm.

[0014] This invention provides an automated siphon method for an artificial incubation system for fertilized eel eggs, comprising the following steps:

[0015] Step 1, Water Injection Period: The float valve is opened to inject water, the water level rises, the water injection velocity is 0.69m / s, and the flow rate is 0.9L / s;

[0016] Step 2, Start-up phase: When the water level reaches the start-up position, the inverted U-shaped siphon pipe is filled with water to trigger the siphon.

[0017] Step 3, Siphoning period: Water is supplied to the hatching tank, and the water level in the high-level water tank drops;

[0018] Step 4, the disruption phase: When the water level drops to the disruption level, air enters and the siphon stops;

[0019] Step 5: Repeat steps 1-4 in a loop.

[0020] In an optional embodiment of the present invention, the duration from the siphon activation in step 3 to the siphon destruction in step 4 is 40 seconds. During these 40 seconds, the water inlet pipe continues to replenish water, with a total replenishment volume of 50L / cycle.

[0021] Compared with the prior art, the present invention provides an artificial incubation system for fertilized eel eggs and its automatic siphon method, which has the following effects: (1) Zero energy consumption operation: It is driven entirely by gravity and water pressure difference, without the need for electricity. (2) Bionic incubation environment: The intermittent water flow simulates the natural foam nest suspension state, and the flow guide cover buffers the water flow to avoid violent stirring of the eggs. (3) Optimized water quality management: The siphon water flow continuously aerates the eggs, and the flat bottom net and overflow hole work together to automatically discharge metabolic waste. (4) Large-scale production: The single tank has an incubation capacity of 100,000 eggs, and the system can be modularly expanded. (5) Simple maintenance: There are no complex electrical components, and the failure rate is low. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an artificial incubation system for fertilized eel eggs provided in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of a high-level water tank structure for an artificial incubation system for fertilized eel eggs provided in an embodiment of this application.

[0025] Figure 3 The diagram below illustrates the working principle of a high-level water tank siphon system, as provided in this application embodiment. A: Initial state; B: The float valve opens to inject water, and the water level rises; C: When the water level exceeds the peak, the inverted U-shaped pipe is filled with water, triggering the siphon; D: When the water level drops to the breaking siphon level, air enters, the siphon stops, and the next cycle begins.

[0026] Figure 4 This is a schematic diagram of an incubation bucket structure provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of a ring-loop water supply pipeline layout provided in an embodiment of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the system or functional components in this embodiment during use.

[0029] like Figures 1-5 As shown, this embodiment of the invention provides an artificial incubation system for fertilized eel eggs, including an automatic siphon system in a high-level water tank, a circular loop water supply pipe 7, and an incubation tank system. The automatic siphon system in the high-level water tank includes a high-level water tank 1, a water injection pipe 2 controlled by a float valve, an inverted U-shaped siphon pipe 6, and a water level triggering mechanism 5. The water injection pipe 2 controlled by the float valve is located at the upper right corner of the high-level water tank 1. The water level triggering mechanism 5 is connected to the float valve 3 via a lever 4. The inverted U-shaped siphon pipe 6 is located on the left side of the high-level water tank 1. The inverted U-shaped siphon pipe 6 includes an ascending section pipe 6-1 and a descending section pipe 6-2. The ascending section pipe 6-1 is located inside the high-level water tank 1, and the descending section pipe 6-2 is connected to the circular loop water supply pipe 7. The incubation tank system includes multiple incubation tanks 8 connected in parallel, all of which are connected to the circular loop water supply pipe 7. The water level triggering mechanism 5 is preferably a float.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the elevated water tank 1 is a rectangular PE material tank with dimensions of 40cm × 25cm × 60cm and an effective volume of 60L. The height difference between the bottom of the elevated water tank 1 and the overflow outlet 14 of the hatching tank 8 is 110cm. The water injection pipe 2 is a DN40 PVC pipe, and the float valve 3 is a DN40 lever-type float valve with a water injection velocity of 0.69m / s and a flow rate of 0.9L / s. The inverted U-shaped siphon pipe 6 is an inverted U-shaped pipe structure made of DN25 PVC pipe. The apex position 6-3 of the inverted U-shaped siphon pipe 6 is 50cm from the bottom of the elevated water tank 1, the siphon rise section height is 14cm, and the end of the rise section pipe 6-1 is 36cm from the bottom of the elevated water tank.

[0031] Figure 3 A in the context: Initial state. Figure 3 In the B section: the float valve opens to allow water to flow in, causing the water level to rise. Figure 3 C: The water level exceeds the peak, and the inverted U-shaped pipe is filled with water, triggering a siphon. Figure 3 D in the equation: When the water level drops to the siphon breaking level, air enters, the siphon stops, and the next cycle begins. Figure 3 The number 9 in the diagram represents the diaphragm level.

[0032] Figure 5 Combination Figure 1 The loop water supply pipe 7 is made of DN25 PVC pipe to form a closed loop water supply pipe, ensuring that the water supply pressure of each incubation tank 8 is the same. Ten DN25×20 PVC tee structures 7-1 are connected in parallel to supply water to the ten incubation tanks 8. In this embodiment, each group of incubation tanks consists of 10 tanks connected in parallel. The incubation tanks are PE material frustum-shaped containers with a bottom diameter Φ1 of 22cm, a top diameter Φ2 of 32cm, a height H of 40cm, and a volume of 20L.

[0033] like Figure 4 As shown, each hatching tank 8 is equipped with an inverted conical guide shroud 10 and a flat-bottomed filter screen 11 at the bottom, with a water inlet 12 at the bottom of the inverted conical guide shroud 10. Each hatching tank 8 is equipped with an escape-proof net cover 13 at the top; the flat-bottomed filter screen 11 is a 20-mesh stainless steel flat-bottomed mesh, and the escape-proof net cover 13 is a 20-mesh nylon escape-proof net cover. An overflow hole 14 is opened 10cm from the top surface of each hatching tank 8. The flat-bottomed filter screen 11 is used to reduce the accumulation of eel eggs. The upward flow is diffused by the inverted conical guide shroud 10, keeping the eggs suspended between the escape-proof net cover 13 and the flat-bottomed filter screen 11. When the water level rises to the overflow hole 14, the surface water is discharged, carrying away impurities. In this embodiment, a 20-mesh nylon escape-proof net cover is installed 20cm below the top surface of the hatching tank 8, and an overflow hole with a diameter of Φ25mm is drilled 10cm below the top surface. The inverted conical guide shroud 10 has a cone angle of 110°, which is used to disperse the incoming water flow, reduce the disturbance of the incoming water flow, and prevent the eggs from being violently agitated.

[0034] Each hatching tank (8 units) has a volume of 20L. The elevated water tank (1) activates its siphon water supply approximately once per minute, with an average single water supply of 5L per hatching tank (8 units). After the fertilized eel eggs have hardened due to water absorption, they are placed in the hatching tanks for incubation. On the 5th day of incubation, when heartbeats begin and eye bases form, they are transferred to a static incubation box. Each hatching tank (8 units) holds 80,000-100,000 eggs, achieving a hatching rate of over 80%. Hatching rate = number of fertilized eggs / number of eye bases formed; 10 tanks can hold up to 1 million eggs.

[0035] This invention provides an automated siphon method for an artificial incubation system for fertilized eel eggs, comprising the following steps:

[0036] Step 1, Water Injection Period: The float valve is opened to inject water, the water level rises, the water injection velocity is 0.69m / s, and the flow rate is 0.9L / s;

[0037] Step 2, Start-up phase: When the water level reaches the start-up position, the inverted U-shaped siphon pipe is filled with water to trigger the siphon.

[0038] Step 3, Siphoning period: Water is supplied to the hatching tank, and the water level in the high-level water tank drops;

[0039] Step 4, the disruption phase: When the water level drops to the disruption level, air enters and the siphon stops;

[0040] Step 5: Repeat steps 1-4 in a loop.

[0041] Preferably, the duration from the siphon start-up in step 3 to the siphon breakdown in step 4 is 40 seconds. During these 40 seconds, the water inlet pipe continues to replenish water, with a total replenishment volume of 50L / cycle.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An artificial incubation system for fertilized eel eggs, characterized in that, The system includes an automatic siphon system for a high-level water tank, a ring-loop water supply pipe (7), and an incubation tank system. The automatic siphon system for a high-level water tank includes a high-level water tank (1), a water injection pipe (2) controlled by a float valve, an inverted U-shaped siphon pipe (6), and a water level triggering mechanism (5). The water injection pipe (2) controlled by the float valve is located at the upper right corner of the high-level water tank (1). The water level triggering mechanism (5) is connected to the float valve (3) via a lever (4). The inverted U-shaped siphon pipe (6) is located on the left side of the high-level water tank (1). The inverted U-shaped siphon pipe (6) includes an ascending section pipe (6-1) and a descending section pipe (6-2). The ascending section pipe (6-1) is located inside the high-level water tank (1), and the descending section pipe (6-2) is connected to the ring-loop water supply pipe (7). The incubation tank system includes multiple incubation tanks (8) connected in parallel. All multiple incubation tanks (8) are connected to the ring-loop water supply pipe (7).

2. The artificial incubation system for fertilized eel eggs according to claim 1, characterized in that, The elevated water tank (1) is a rectangular PE material water tank with a length, width and height of 40cm×25cm×60cm and a volume of 60L; the height difference between the bottom of the elevated water tank (1) and the overflow outlet (14) of the incubation bucket (8) is 110cm.

3. The artificial incubation system for fertilized eel eggs according to claim 1, characterized in that, The water injection pipe (2) is a DN40 PVC pipe, and the float valve (3) is a DN40 lever float valve. The water injection velocity is 0.69m / s and the flow rate is 0.9L / s.

4. The artificial incubation system for fertilized eel eggs according to claim 1, characterized in that, The inverted U-shaped siphon (6) is an inverted U-shaped pipe structure made of DN25 PVC pipe. The vertex (6-3) of the inverted U-shaped siphon (6) is 50cm away from the bottom of the high-level water tank (1). The height of the siphon rising section is 14cm. The port of the rising section pipe (6-1) is 36cm away from the bottom of the high-level water tank.

5. The artificial incubation system for fertilized eel eggs according to claim 1, characterized in that, The ring-shaped water supply pipe (7) is made of DN25 PVC pipe to form a closed-loop water supply pipe, ensuring that the water supply pressure of each hatching tank (8) is the same. Ten DN25×20 PVC tee structures (7-1) are connected in parallel to supply water to the ten hatching tanks (8).

6. The artificial incubation system for fertilized eel eggs according to claim 1, characterized in that, Each hatching tank (8) is equipped with an inverted cone-shaped flow guide (10) and a flat-bottomed filter (11) at the bottom, and an escape-proof net cover (13) is provided at the top of each hatching tank (8); the flat-bottomed filter (11) is a 20-mesh stainless steel flat-bottomed mesh, and the escape-proof net cover (13) is a 20-mesh nylon escape-proof net cover. Each hatching tank (8) has an overflow hole (14) 10cm from the top surface; the flat-bottomed filter (11) is used to reduce the accumulation of eel eggs, and the upward flow is formed by the diffusion of the inverted cone-shaped flow guide (10). The eggs are kept suspended between the escape-proof net cover (13) and the flat-bottomed filter (11). When the water level rises to the position of the overflow hole (14), the surface water is discharged, and impurities are carried away.

7. The artificial incubation system for fertilized eel eggs according to claim 6, characterized in that, The inverted conical guide shroud (10) has a cone angle of 110°, which is used to disperse the incoming water flow, reduce the disturbance of the incoming water flow, and prevent the eggs from being violently agitated.

8. The artificial incubation system for fertilized eel eggs according to claim 6, characterized in that, The overflow hole (14) has a diameter of 25 mm.

9. An automatic siphon method for an artificial incubation system for fertilized eel eggs, characterized in that, Includes the following steps: Step 1, Water Injection Period: The float valve is opened to inject water, the water level rises, the water injection velocity is 0.69m / s, and the flow rate is 0.9L / s; Step 2, Start-up phase: When the water level reaches the start-up position, the inverted U-shaped siphon pipe is filled with water to trigger the siphon. Step 3, Siphoning period: Water is supplied to the hatching tank, and the water level in the high-level water tank drops; Step 4, the disruption phase: When the water level drops to the disruption level, air enters and the siphon stops; Step 5: Repeat steps 1-4 in a loop.

10. The automatic siphon method for the artificial incubation system of fertilized eel eggs according to claim 9, characterized in that, The duration from the siphon activation in step 3 to the siphon destruction in step 4 is 40 seconds. During these 40 seconds, the water inlet pipe continues to replenish water, with a total replenishment volume of 50L / cycle.

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