High-density live fry transport vehicle and method of transporting same

Abstract

The present application relates to the technical field of fish fry transportation, and proposes a high-density live fish fry transportation vehicle, which comprises a transportation vehicle, a fish fry transportation box and a water circulation module are arranged on the transportation vehicle, the fish fry transportation box comprises a protective frame, an upper storage box and a lower storage box are fixedly installed in the protective frame, the upper storage box and the lower storage box are distributed in a one-above-the-other mode, the upper storage box and the lower storage box are both used for storing live fish fry, the water circulation module comprises an oxygenation module and a sterilization and filtration module, the oxygenation module and the sterilization and filtration module are fixedly connected through multiple groups of connecting pipes and are in communication with each other.The preset three-level early warning and emergency mechanism constitutes an active safety line, when the environmental parameters reach different level thresholds, the system can automatically perform progressive response from sound and light early warning, activation of a backup system to priority protection of core functions, significantly improving the system robustness and survival guarantee capability in emergency situations such as sudden decrease of dissolved oxygen, temperature anomaly or out-of-control liquid level.

Description

Technical Field

[0001] This invention relates to the field of fish fry transportation technology, specifically to a high-density live fish fry transport vehicle and its transportation method. Background Technology

[0002] Live fish fry transportation is a crucial link in the modern aquaculture and sales industry chain. Its core challenge lies in how to maintain sufficient dissolved oxygen, constant temperature, and clean water quality in a closed, high-density, and continuously bumpy transportation environment after the fish fry leave their original aquaculture water, so as to maximize the survival rate and health of the fish fry.

[0003] In the marine ranching industry, live fish fry transportation is a crucial process connecting the seedling and aquaculture stages. The survival rate of fish fry during transportation directly affects the economic benefits of aquaculture. Currently, the industry faces four major pain points: First, traditional fish transport vehicles use a single large water tank design, resulting in low space utilization, limited unit transport capacity, inability to meet high-density transportation needs, and high transportation costs. Second, water purification relies heavily on simple filtration devices, which have poor purification effects, are prone to bacterial growth, and have insufficient water exchange. The accumulation of pollutants such as fish fry excrement leads to water quality deterioration, causing stress reactions and even death in fish fry. Third, the life support system is fragile: traditional oxygenation methods are limited to air pumps, and once circuit failure or oxygen depletion occurs, there is a lack of effective physical backup methods, resulting in poor risk resistance.

[0004] This invention, through an integrated design including roller microfiltration, ultraviolet sterilization, high-efficiency oxygenation, and heat pump temperature control, and a double-layered tank, constructs a stable, uniform, and clean closed-loop water circulation system, fundamentally solving the problem of maintaining water quality and constant temperature. Summary of the Invention

[0005] This invention proposes a high-density live fish fry transport vehicle and its transport method, which solves the technical problems in related technologies, such as low transport density, large fluctuations in survival rate, and high risks of long-distance transport caused by unstable transport environment, easy deterioration of water quality, and reliance on human experience for control.

[0006] The technical solution of the present invention is as follows:

[0007] A high-density live fish fry transport vehicle includes a transport vehicle, on which a fish fry transport box and a water circulation module are installed. The fish fry transport box includes a protective frame, and an upper storage box and a lower storage box are fixedly installed inside the protective frame. The upper storage box and the lower storage box are distributed vertically and correspondingly. Both the upper storage box and the lower storage box are used to store live fish fry.

[0008] The water circulation module includes an oxygenation module and a sterilization and filtration module. The oxygenation module is located above the sterilization and filtration module. The oxygenation module and the sterilization and filtration module are fixedly connected and interconnected by multiple sets of connecting pipes.

[0009] The sterilization and filtration module is equipped with multiple sets of ultraviolet germicidal lamps, and also contains a drum microfilter and an air source heat pump unit.

[0010] A multi-channel pipe is fixedly installed between the upper and lower storage boxes. The multi-channel pipe connects to the interior of the upper and lower storage boxes near the top through multiple branch pipes. The side of the multi-channel pipe away from the fish fry transport box is fixedly connected to the oxygenation module and interconnected with each other.

[0011] A multi-channel pipe is fixedly installed between the upper and lower storage boxes. The multi-channel pipe is also connected to the interior of the upper and lower storage boxes near the bottom through multiple branch pipes. The side of the multi-channel pipe away from the fish fry transport box is fixedly connected to the sterilization and filtration module and interconnected with each other.

[0012] In one embodiment of the present invention, multiple sets of partitions A and multiple sets of partitions B are fixedly installed at equal intervals inside the oxygenation module. The partitions A and B are alternately distributed. The upper end of the multiple sets of partitions A forms a communication port with the top of the inner wall of the oxygenation module, and the lower end of the multiple sets of partitions B also forms a communication port with the bottom of the inner wall of the oxygenation module. The multiple sets of partitions A and multiple sets of partitions B divide the interior of the oxygenation module into a meandering flow channel space.

[0013] In one embodiment of the present invention, a plurality of oxygen cylinders are provided on one side of the sterilization and filtration module, and an oxygen tube is fixedly installed on each of the plurality of oxygen cylinders. The end of the oxygen tube away from the oxygen cylinder is fixedly connected to the oxygenation module and communicates with the interior of the oxygenation module.

[0014] In one embodiment of the present invention, the top surfaces of the upper storage box and the lower storage box are provided with protrusions, and a hollow part is provided on one side of the protrusions. The inner bottom surfaces of the upper storage box and the lower storage box have an arc-shaped structure.

[0015] In one embodiment of the present invention, both the upper and lower storage boxes are equipped with sensing units, which include a dissolved oxygen sensor, a temperature sensor, and a liquid level sensor. The dissolved oxygen sensor is installed in the water layer in the middle of the box; the temperature sensor is close to the inner wall of the box; and the liquid level sensor is installed on the top of the box. A control terminal equipped with an industrial-grade PLC touch screen is installed in the cab of the transport vehicle.

[0016] A method for transporting high-density live fish fry using a transport vehicle, comprising the following four steps executed cyclically:

[0017] Step 1: Real-time data acquisition and transmission;

[0018] Step 2: PID closed-loop control of core parameters;

[0019] Step 3: Level 3 Early Warning and Automatic Emergency Response;

[0020] Step 4: Human-computer interaction and full-process monitoring.

[0021] In one embodiment of the present invention, in step one, a dissolved oxygen sensor continuously monitors the dissolved oxygen concentration in the center of the water body, a temperature sensor monitors the water temperature near the inner wall of the tank, and a liquid level sensor monitors the water level in the tank. All sensor data are transmitted in real time to the industrial-grade PLC control terminal in the cab via signal lines.

[0022] In one embodiment of the present invention, in step two, the PLC control terminal has a built-in PID control algorithm, and the output of each controller... It consists of a superposition of proportional, integral, and differential components, and its discrete position form is expressed as:

[0023]

[0024] in, The deviation value at the current sampling time is determined by the set value. Compared with sensor measured values The calculation shows that, ; The proportionality coefficient determines the system's response speed to the current deviation. The integral coefficient is... The differential coefficient is used to predict the trend of deviation changes; This refers to the system control cycle.

[0025] In one embodiment of the present invention, step two involves setting a value in the dissolved oxygen control loop. The core target is 7 mg / L, among which, Represents the desired dissolved oxygen level. This represents the dissolved oxygen value measured in real time by the dissolved oxygen sensor. This represents the deviation between the set value and the measured value, i.e. ,and This represents the control signal calculated and output by the PID controller to adjust the opening of the oxygenation valve. To reduce frequent valve operations and achieve energy-saving and stable operation, a control dead zone with a boundary of 6 mg / L to 8 mg / L is set. At that time, the system judges the deviation. According to the control algorithm, it increases positively. To improve oxygen supply; when At that time, the judgment and reduce To reduce oxygen supply; when the measured value is within the dead zone, i.e. At this time, the system maintains the current valve opening. constant;

[0026] In the temperature control loop, the target temperature is... For setting value The controller according to Calculate and output power regulation commands for the air source heat pump. The system strictly limits the rate of temperature change to protect the fish fry; the constraints are as follows:

[0027]

[0028] In one embodiment of the present invention, step three is triggered when the dissolved oxygen level drops to 56 mg / L or the temperature deviates from the target value by ±1℃. The PLC control terminal triggers the audible and visual alarm in the driver's cab. When the environment deteriorates, and the dissolved oxygen level is ≤5 mg / L or the water temperature is ≤8℃ or ≥18℃, the system activates the backup oxygen cylinder while maintaining the first-level response measures. When a serious abnormality occurs, the system cuts off the power supply to non-core equipment such as the roller microfilter and some lighting, and fully guarantees the power supply to the oxygenation module, air source heat pump unit and core circulation pump.

[0029] The working principle and beneficial effects of this invention are as follows:

[0030] 1. In this invention, the vertical distribution of the upper and lower storage boxes and the internal arc-shaped bottom design double the transport capacity within a limited space. Simultaneously, it facilitates the collection of waste from the bottom of the boxes towards the center, allowing it to be easily drawn into the sterilization and filtration module via multiple pipes below. This module integrates a roller microfilter and an ultraviolet germicidal lamp, which efficiently remove suspended solids and kill pathogenic microorganisms, respectively, providing dual purification of water quality from both physical and biological perspectives. The purified water is pumped into the upper oxygenation module via connecting pipes. The meandering flow channel formed by partitions A and B significantly extends the water-air contact path and time. Combined with continuous oxygen supply from oxygen cylinders, this significantly improves dissolved oxygen efficiency. The oxygen-enriched water finally flows evenly back to the upper part of each storage box via multiple pipes above, forming a three-dimensional circulation path of lower-level waste discharge and upper-level oxygenation return. This effectively avoids dead zones in dissolved oxygen or water temperature within the boxes, providing a uniform, clean, and oxygen-enriched aquatic environment for the fish fry.

[0031] 2. In this invention, the protective frame provides robust physical protection for the entire storage box assembly, resisting bumps and impacts during transportation. The oxygenation module is placed above the sterilization and filtration module, which not only optimizes space utilization but also utilizes gravity-assisted water circulation to reduce water pump energy consumption. The independent setting of multiple oxygen cylinders constitutes oxygen supply redundancy. When the main oxygen supply system malfunctions or the dissolved oxygen demand increases sharply, the backup gas source can be activated immediately, providing key hardware support for the execution of the secondary emergency response in the intelligent control system and ensuring the continuous operation of the life support system under extreme conditions.

[0032] 3. This invention utilizes dissolved oxygen, temperature, and liquid level sensors installed in each storage tank to achieve real-time monitoring, enabling accurate and timely data acquisition of core environmental parameters of the water body. This provides a reliable basis for intelligent decision-making. A dual-closed-loop independent controller based on a PID algorithm processes the collected data in real time, dynamically adjusting the opening of the oxygenation valve and the power of the air source heat pump to maintain the dissolved oxygen level stably within the optimal range of 6-8 mg / L. Simultaneously, the rate of temperature change is strictly controlled within 2.5℃ per hour, creating a highly stable and suitable living environment for the fish fry and effectively avoiding environmental stress. Furthermore, the preset three-level early warning and emergency mechanism constitutes an active safety defense line. When environmental parameters reach different threshold levels, the system can automatically execute a progressive response, from audible and visual warnings and activation of the backup system to priority protection of core functions. This significantly improves the system's robustness and survival guarantee capabilities in emergency situations such as sudden drops in dissolved oxygen, abnormal temperatures, or uncontrolled liquid levels.

[0033] 4. In this invention, the industrial-grade PLC touch screen control terminal integrated in the cab provides operators with a comprehensive human-machine interface, supporting split-screen monitoring of the entire vehicle status, historical data tracing, flexible setting of parameter thresholds, and switching between manual and automatic modes. This deeply integrates automated intelligent control with human experience judgment, ultimately achieving high survival rate, high safety, and high controllability in the long-distance transportation of high-density live fish fry. Attached Figure Description

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0036] Figure 2 This is a three-dimensional structural diagram of the fish fry transport box and the distribution of the multiple pipelines below it according to the present invention;

[0037] Figure 3 This is a three-dimensional structural diagram of the fish fry transport box and the distribution of the multiple pipelines above it according to the present invention;

[0038] Figure 4 This is a three-dimensional structural diagram of the water circulation module of the present invention;

[0039] Figure 5 This is a cross-sectional view of the internal structure of the oxygenation module of the present invention;

[0040] Figure 6 This is a cross-sectional view of the internal structure of the fish fry transport box of the present invention;

[0041] Figure 7 This is a schematic diagram showing the distribution of small hydraulic push rods on the transport vehicle of the present invention;

[0042] Figure 8 This is a flowchart of the main control cycle for the high-density live fish fry transport vehicle of the present invention.

[0043] 1. Transport vehicle; 2. Fish fry transport box; 3. Water circulation module; 2-1. Protective frame; 2-2. Upper storage box; 2-3. Lower storage box; 2-4. Protrusion; 2-5. Hollowed-out part; 3-1. Oxygenation module; 3-2. Sterilization and filtration module; 3-3. Connecting pipe; 3-4. Oxygen cylinder; 3-5. Oxygen pipe; 4. Upper multi-channel pipe; 5. Lower multi-channel pipe; 6. Partition A; 7. Partition B; 8. Small hydraulic push rod. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figures 1-4 As shown, this embodiment proposes a high-density live fish fry transport vehicle, including a transport vehicle 1. The transport vehicle 1 is equipped with a fish fry transport box 2 and a water circulation module 3. The fish fry transport box 2 includes a protective frame 2-1. An upper storage box 2-2 and a lower storage box 2-3 are fixedly installed inside the protective frame 2-1. The upper storage box 2-2 and the lower storage box 2-3 are distributed vertically and correspondingly. Both the upper storage box 2-2 and the lower storage box 2-3 are used to store live fish fry. The top surface of both the upper storage box 2-2 and the lower storage box 2-3 is provided with a protrusion 2-4. A hollow part 2-5 is opened on one side of the protrusion 2-4.

[0047] The water circulation module 3 includes an oxygenation module 3-1 and a sterilization and filtration module 3-2. The oxygenation module 3-1 is located above the sterilization and filtration module 3-2. The oxygenation module 3-1 and the sterilization and filtration module 3-2 are fixedly connected and interconnected by multiple sets of connecting pipes 3-3. Multiple sets of oxygen cylinders 3-4 are provided on one side of the sterilization and filtration module 3-2. Each set of oxygen cylinders 3-4 is fixedly equipped with an oxygen pipe 3-5. The end of the oxygen pipe 3-5 away from the oxygen cylinder 3-4 is fixedly connected to the oxygenation module 3-1 and connects to the interior of the oxygenation module 3-1.

[0048] Furthermore, the sterilization and filtration module 3-2 is equipped with multiple sets of ultraviolet germicidal lamps, and also contains a drum microfilter and an air source heat pump unit. The drum microfilter effectively filters solid impurities such as fish fry excrement and uneaten feed in the water; the multiple sets of ultraviolet germicidal lamps efficiently kill harmful bacteria and pathogens in the water; and the air source heat pump unit achieves precise temperature control.

[0049] An upper multi-way pipe 4 is fixedly installed between the upper storage box 2-2 and the lower storage box 2-3. The upper multi-way pipe 4 is connected to the interior of the upper storage box 2-2 and the lower storage box 2-3 near the top through multiple branch pipes. The side of the upper multi-way pipe 4 away from the fish fry transport box 2 is fixedly connected to 3-1 and interconnected with each other.

[0050] A multi-way pipe 5 is fixedly installed between the upper storage box 2-2 and the lower storage box 2-3. The multi-way pipe 5 is also connected to the interior of the upper storage box 2-2 and the lower storage box 2-3 near the bottom through multiple branch pipes. The side of the multi-way pipe 5 away from the fish fry transport box 2 is fixedly connected to 3-2 and interconnected with each other.

[0051] Furthermore, the inner bottom surfaces of the upper storage box 2-2 and the lower storage box 2-3 are arc-shaped. The arc-shaped structure of the inner bottom surfaces of the upper storage box 2-2 and the lower storage box 2-3 can effectively reduce water sloshing, reduce the fright of fish fry, and improve the safety of fish fry transportation.

[0052] Multiple sets of partitions A6 and B7 are fixedly installed at equal intervals inside the oxygenation module 3-1. The partitions A6 and B7 are distributed alternately. The upper end of the multiple sets of partitions A6 forms a communication opening with the top of the inner wall of the oxygenation module 3-1, and the lower end of the multiple sets of partitions B7 forms a communication opening with the bottom of the inner wall of the oxygenation module 3-1. The multiple sets of partitions A6 and B7 divide the interior of the oxygenation module 3-1 into a meandering flow channel space.

[0053] A small hydraulic push rod 8 is fixedly installed on the bottom of the transport vehicle 1, corresponding to the drain outlet of the fish fry transport box 2. It is movably hinged to the bottom of the fish fry transport box 2. The small hydraulic push rod 8 is equipped with a two-way hydraulic lock and a mechanical locking mechanism to prevent accidental triggering during transportation. When unloading fish, it can drive the fish fry transport box 2 to tilt so that the fish outlet naturally faces downward. Combined with the arc-shaped bottom structure of the upper storage box 2-2 and the lower storage box 2-3, it can achieve rapid fish unloading.

[0054] By combining the upper storage tank 2-2 and the lower storage tank 2-3 vertically and designing the internal arc-shaped bottom, the transport capacity is doubled within a limited space. At the same time, it facilitates the collection of waste at the bottom of the tank towards the center, which can then be drawn into the sterilization and filtration module 3-2 for treatment through the multiple pipes 5 below. The sterilization and filtration module 3-2 integrates a drum microfilter and an ultraviolet germicidal lamp, which efficiently removes suspended solids and kills pathogenic microorganisms, respectively, thus purifying the water quality from both physical and biological levels. The purified water is pumped into the oxygenation module 3-1 above through the connecting pipe 3-3. The meandering flow channel formed by the partitions A6 and B7 inside the module greatly extends the contact path and time between water and air. Combined with the continuous oxygen supply from the oxygen cylinder 3-4, the dissolved oxygen efficiency is significantly improved. The oxygen-enriched water is then evenly returned to the top of each storage tank through the multi-channel pipe 4 above, forming a three-dimensional circulation path of "bottom layer sewage discharge, middle layer filtration, and top layer oxygenation and return". This effectively avoids dead zones in dissolved oxygen or water temperature in the tank, providing a uniform, clean, and oxygen-enriched water environment for the fish fry.

[0055] The protective frame 2-1 provides robust physical protection for the entire storage box assembly, resisting bumps and impacts during transportation. The design of the protrusion 2-4 and the hollow part 2-5, without affecting the structural strength, can also take into account gas exchange, feeding and observation inside the box. Placing the oxygenation module 3-1 on top of the sterilization and filtration module 3-2 not only optimizes space utilization but also utilizes gravity-assisted water circulation to reduce water pump energy consumption. The independent setting of multiple oxygen cylinders 3-4 constitutes oxygen supply redundancy. When the main oxygen supply system malfunctions or the dissolved oxygen demand increases sharply, the backup gas source can be activated immediately to ensure the continuous operation of the life support system under extreme conditions.

[0056] Both the upper storage tank 2-2 and the lower storage tank 2-3 are equipped with sensing units, including dissolved oxygen sensors, temperature sensors, and liquid level sensors. The dissolved oxygen sensor is installed in the water layer in the middle of the tank; the temperature sensor is close to the inner wall of the tank; and the liquid level sensor is installed on the top of the tank to avoid contact with the fish fry. The control terminal in the cab of the transport vehicle 1 is equipped with an industrial-grade PLC touch screen, which supports split-screen display of real-time parameters, equipment status, and historical data curves of each tank. It has manual / automatic mode switching, parameter threshold setting, and alarm record query functions.

[0057] A method for transporting high-density live fish fry using a transport vehicle. The intelligent control system of this method automatically maintains the optimal environment for the survival of the fish fry based on real-time data from sensor units and preset logic, specifically executing the following four steps in a loop:

[0058] Step 1: Real-time data acquisition and transmission. After the transport vehicle 1 starts, the sensing units installed inside the upper storage box 2-2 and the lower storage box 2-3 begin to work. The dissolved oxygen sensor continuously monitors the dissolved oxygen concentration in the center of the water, the temperature sensor monitors the water temperature close to the inner wall of the box, and the liquid level sensor monitors the water level in the box. All sensor data are transmitted in real time to the industrial-grade PLC control terminal in the driver's cab via signal lines.

[0059] Step Two: PID closed-loop control of core parameters. The PLC control terminal has a built-in PID control algorithm to process the collected data in real time and drive the actuators. The system performs precise, decoupled real-time control of dissolved oxygen and temperature. The output of each controller... It consists of a superposition of proportional, integral, and differential components, and its discrete position form is expressed as:

[0060]

[0061] in, The deviation value at the current sampling time is determined by the set value. Compared with sensor measured values The calculation shows that, ; The proportionality coefficient determines the system's response speed to the current deviation. These are integral coefficients used to eliminate steady-state errors, such as long-term, slow dissolved oxygen decay. The differential coefficient is used to predict the trend of deviation changes and suppress overshoot, such as sudden temperature changes. In this embodiment, the cycle value is set to 1 second to ensure the real-time response of the system control cycle.

[0062] Dissolved oxygen regulation: In the dissolved oxygen control loop, the setpoint The core target is 7 mg / L, among which, Represents the desired dissolved oxygen level. This represents the dissolved oxygen value measured in real time by the dissolved oxygen sensor. This represents the deviation between the set value and the measured value, i.e. ,and This represents the control signal calculated and output by the PID controller to adjust the opening of the oxygenation valve. To reduce frequent valve actuation and achieve energy-saving and stable operation, the system sets a control dead zone with a boundary of 6 mg / L to 8 mg / L. When the measured dissolved oxygen... At that time, the system judges the deviation. According to the control algorithm, it increases positively. To improve oxygen supply; when At that time, the judgment and reduce To reduce oxygen supply; when the measured value is within the dead zone, i.e. At this time, the system maintains the current valve opening. constant;

[0063] Temperature control: In the temperature control loop, the target temperature is... (For example, 15℃) is the set value The controller according to Calculate and output power regulation commands for the air source heat pump. The system strictly limits the rate of temperature change to protect the fish fry; the constraints are as follows:

[0064]

[0065] Within each control cycle, the target temperature adjustment amount output by the algorithm will be dynamically limited to ensure a smooth water temperature transition and avoid thermal shock.

[0066] Step 3: Three-level early warning and automatic emergency response. The system has preset three progressive safety thresholds. Once triggered, the corresponding contingency plan is executed immediately:

[0067] Level 1 Warning: Triggered when dissolved oxygen drops to 5-6 mg / L or temperature deviates from the target value by ±1℃. The PLC control terminal triggers the cab's audible and visual alarm to alert the driver and automatically strengthens the control measures in step two, such as slightly increasing the oxygen supply power or heat pump power.

[0068] Level 2 Emergency: Triggered when the environment deteriorates, dissolved oxygen level ≤5 mg / L or water temperature ≤8℃ or ≥18℃. The system will automatically open 3-4 backup oxygen cylinders while maintaining Level 1 response measures to ensure uninterrupted oxygen supply, and the alarm level will be upgraded.

[0069] Level 3 Emergency Response: When a serious anomaly occurs, such as when the liquid level is ≤10 cm or ≥50 cm, the system will immediately execute the highest level response: automatically cut off the power supply to non-core equipment such as the drum microfilter and some lighting, and fully guarantee the power supply of the oxygenation module 3-1, the air source heat pump unit and the core circulation pump to ensure the survival of the fish fry.

[0070] Step 4: Human-machine interaction and full-process monitoring. The driver monitors the entire process through the PLC touch screen control terminal. The screen can display the real-time parameters of each storage box, the equipment operating status and historical data curves in split screen. The driver can manually switch between automatic / manual modes, set or modify various control thresholds, and query historical alarm records as needed, so as to achieve comprehensive control and traceable management of the transportation process.

[0071] This invention utilizes dissolved oxygen, temperature, and liquid level sensors installed in each storage tank to achieve real-time and accurate data acquisition of core environmental parameters of the water body, providing a reliable basis for intelligent decision-making. A dual-closed-loop independent controller based on a PID algorithm processes the acquired data in real time, dynamically adjusting the opening of the oxygenation valve and the power of the air source heat pump to maintain dissolved oxygen levels stably within the optimal range of 6-8 mg / L. Simultaneously, the rate of temperature change is strictly controlled within 2.5°C per hour, creating a highly stable and suitable living environment for the fish fry and effectively avoiding environmental stress. Furthermore, a pre-set three-level early warning and emergency mechanism constitutes an active safety defense line. When environmental parameters reach different threshold levels, the system automatically executes a progressive response, from audible and visual warnings and activation of backup systems to priority protection of core functions, significantly improving the system's robustness and survival guarantee capabilities in emergency situations such as sudden drops in dissolved oxygen, abnormal temperatures, or uncontrolled liquid levels.

[0072] Although embodiments of the present invention have been shown and described in detail above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-density live fish fry transport vehicle, comprising a transport vehicle (1), characterized in that, The transport vehicle (1) is equipped with a fish fry transport box (2) and a water circulation module (3). The fish fry transport box (2) includes a protective frame (2-1). An upper storage box (2-2) and a lower storage box (2-3) are fixedly installed inside the protective frame (2-1). The upper storage box (2-2) and the lower storage box (2-3) are distributed vertically and vertically. Both the upper storage box (2-2) and the lower storage box (2-3) are used to store live fish fry. The water circulation module (3) includes an oxygenation module (3-1) and a sterilization and filtration module (3-2). The oxygenation module (3-1) is located above the sterilization and filtration module (3-2). The oxygenation module (3-1) and the sterilization and filtration module (3-2) are fixedly connected and interconnected by multiple sets of connecting pipes (3-3). The sterilization and filtration module (3-2) is equipped with multiple sets of ultraviolet germicidal lamps. The sterilization and filtration module (3-2) is also equipped with a drum microfilter and an air source heat pump unit. An upper multi-way pipe (4) is fixedly installed between the upper storage box (2-2) and the lower storage box (2-3). The upper multi-way pipe (4) is connected to the interior of the upper storage box (2-2) and the lower storage box (2-3) near the top through multiple branch pipes. The upper multi-way pipe (4) is fixedly connected to the oxygenation module (3-1) on the side away from the fish fry transport box (2) and is interconnected with each other. A multi-channel pipe (5) is fixedly installed between the upper storage box (2-2) and the lower storage box (2-3). The multi-channel pipe (5) is also connected to the interior of the upper storage box (2-2) and the lower storage box (2-3) near the bottom through multiple branch pipes. The side of the multi-channel pipe (5) away from the fish fry transport box (2) is fixedly connected to the sterilization and filtration module (3-2) and interconnected with each other.

2. The high-density live fish fry transport vehicle according to claim 1, characterized in that, The oxygenation module (3-1) is fixedly installed with multiple sets of partitions A (6) and B (7) at equal intervals inside. The partitions A (6) and B (7) are distributed alternately. The upper end of the multiple sets of partitions A (6) forms a communication port with the top of the inner wall of the oxygenation module (3-1), and the lower end of the multiple sets of partitions B (7) forms a communication port with the bottom of the inner wall of the oxygenation module (3-1). The multiple sets of partitions A (6) and B (7) divide the interior of the oxygenation module (3-1) into a meandering flow channel space.

3. A high-density live fish fry transport vehicle according to claim 1, characterized in that, The sterilization and filtration module (3-2) has multiple oxygen cylinders (3-4) on one side. Each oxygen cylinder (3-4) is fixedly equipped with an oxygen tube (3-5). The end of the oxygen tube (3-5) away from the oxygen cylinder (3-4) is fixedly connected to the oxygenation module (3-1) and connected to the interior of the oxygenation module (3-1).

4. A high-density live fish fry transport vehicle according to claim 1, characterized in that, The top surfaces of the upper storage box (2-2) and the lower storage box (2-3) are provided with protrusions (2-4), and a hollow part (2-5) is opened on one side of the protrusions (2-4). The bottom surfaces of the upper storage box (2-2) and the lower storage box (2-3) are arc-shaped.

5. A high-density live fish fry transport vehicle according to claim 1, characterized in that, The upper storage box (2-2) and the lower storage box (2-3) are both equipped with sensing units. The sensing units include a dissolved oxygen sensor, a temperature sensor and a liquid level sensor. The dissolved oxygen sensor is installed in the water layer in the middle of the box; the temperature sensor is close to the inner wall of the box; and the liquid level sensor is installed on the top of the box. The transport vehicle (1) is equipped with a control terminal in the driver's cab, which is equipped with an industrial-grade PLC touch screen.

6. A method for transporting live fish fry using a high-density live fish fry transport vehicle, characterized in that, This transportation method is executed cyclically in the following four steps: Step 1: Real-time data acquisition and transmission; Step 2: PID closed-loop control of core parameters; Step 3: Level 3 Early Warning and Automatic Emergency Response; Step 4: Human-computer interaction and full-process monitoring.

7. The transportation method of a high-density live fish fry transport vehicle according to claim 6, characterized in that, In step one, the dissolved oxygen sensor continuously monitors the dissolved oxygen concentration in the center of the water body, the temperature sensor monitors the water temperature near the inner wall of the tank, and the liquid level sensor monitors the water level in the tank. All sensor data are transmitted in real time to the industrial-grade PLC control terminal in the cab via signal lines.

8. The transportation method of a high-density live fish fry transport vehicle according to claim 6, characterized in that, In step two, the PLC control terminal has a built-in PID control algorithm, and the output of each controller... It consists of a superposition of proportional, integral, and differential components, and its discrete position form is expressed as: ;in, The deviation value at the current sampling time is determined by the set value. Compared with sensor measured values The calculation shows that, ; The proportionality coefficient determines the system's response speed to the current deviation. The integral coefficient is... The differential coefficient is used to predict the trend of deviation changes; This refers to the system control cycle.

9. The transportation method of a high-density live fish fry transport vehicle according to claim 6, characterized in that, In step two, a set value is set in the dissolved oxygen control loop. The core target is 7 mg / L, among which, Represents the desired dissolved oxygen level. This represents the dissolved oxygen value measured in real time by the dissolved oxygen sensor. This represents the deviation between the set value and the measured value, i.e. ,and This represents the control signal calculated and output by the PID controller to adjust the opening of the oxygenation valve. To reduce frequent valve operations and achieve energy-saving and stable operation, a control dead zone with a boundary of 6 mg / L to 8 mg / L is set. When the measured dissolved oxygen... At that time, the system judges the deviation. According to the control algorithm, it increases positively. To improve oxygen supply; when At that time, the judgment and reduce To reduce oxygen supply; when the measured value is within the dead zone, i.e. At this time, the system maintains the current valve opening. constant; In the temperature control loop, the target temperature is... For setting value The controller according to Calculate and output power regulation commands for the air source heat pump. The system strictly limits the rate of temperature change to protect the fish fry; the constraints are as follows: 。 10. The transportation method of a high-density live fish fry transport vehicle according to claim 6, characterized in that, Step three is triggered when the dissolved oxygen level drops to 5-6 mg / L or the temperature deviates from the target value by ±1℃. The PLC control terminal triggers the audible and visual alarm in the driver's cab. When the environment deteriorates and the dissolved oxygen level is ≤5 mg / L or the water temperature is ≤8℃ or ≥18℃, the system activates the backup oxygen cylinder (3-4) while maintaining the first-level response measures. When a serious abnormality occurs, the system cuts off the power supply to non-core equipment such as the roller microfilter and some lighting, and fully guarantees the power supply to the oxygenation module (3-1), the air source heat pump unit and the core circulation pump.

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