Spring-layer water injection type rapid density layering system for ultra-large pool

Abstract

The invention relates to the technical field of fluid density layering, in particular to a spring layer water injection type rapid density layering system for an ultra-large pool, which comprises a spring layer water injection mechanism positioned in a water tank, a fresh water pool arranged above the water tank and a seawater pool arranged below the water tank, the bottom of the frame is fixedly connected with a plurality of injectors, and the top of the frame is provided with a supporting mechanism for adjusting water injection depth position; the water injectors are communicated with the fresh water pool through water pipes, and electromagnetic regulating valves are communicated in the water pipes and located between the water injectors and the fresh water pool; the seawater pool communicates with a driving part; the water pump communicates with the water tank; the controller is used for controlling the electromagnetic regulating valve to open and close based on the water injection depth position so as to regulate the conveying flow; through the spring layer water injection mechanism capable of adjusting the depth position, the density layering interface is rapidly arranged, and a more efficient, accurate and stable marine environment simulation platform is provided for research, development and testing of deep sea equipment.

Description

Technical Field

[0001] This invention relates to the field of fluid density stratification technology, and more specifically to a rapid density stratification system for ultra-large water tanks using a stepped water injection method. Background Technology

[0002] In the field of marine engineering equipment research and development and testing, simulating the real marine environment plays a crucial role in verifying the performance of deep-sea equipment and optimizing design schemes. In particular, for evaluating the durability, stability, and operational efficiency of deep-sea equipment under complex marine environmental conditions, it is usually necessary to construct large-scale test pools capable of accurately simulating the temperature, salinity, and density stratification phenomena of the deep sea. Density stratification, as a key aspect of marine environment simulation, directly affects the accuracy and reliability of experimental results.

[0003] Traditional water injection methods primarily involve filling the pool from the bottom, controlling the injection rate and brine concentration to achieve density stratification. However, when applied to ultra-large pools, this method suffers from drawbacks due to the large pool capacity, lengthy injection time, and difficulty in quickly forming stable density strata. Furthermore, in ultra-large pools, the stratification process often takes several hours or even longer to fill a large volume of water and control its density distribution, failing to meet the demands of efficient experiments. Additionally, once the density stratification location is set during the experiment, it is difficult to adjust flexibly as needed, limiting experimental diversity and flexibility. Moreover, in large-capacity pools, the stability of the density stratification interface is difficult to guarantee, making it susceptible to external interference and affecting the accuracy of experimental results.

[0004] Therefore, this application addresses the shortcomings of traditional injection methods by employing a layered water injection approach combined with automated control technology to reduce the difficulty of manual operation and improve the convenience and safety of the experimental process. This invention aims to solve the problems of low efficiency, difficulty in adjustment, and poor stability inherent in traditional density stratification techniques, providing a more efficient, accurate, and stable marine environment simulation platform for the research and development and testing of deep-sea equipment. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a rapid density stratification system for ultra-large water tanks, which uses an adjustable-depth water injection mechanism to quickly arrange density stratification interfaces, providing a more efficient, accurate, and stable marine environment simulation platform for the research and development and testing of deep-sea equipment.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A rapid density stratification system for super-large water tanks with interlayer water injection, including an interlayer water injection mechanism located in a water tank, a freshwater tank above the water tank, a seawater tank below the water tank, the interlayer water injection mechanism including a frame, a plurality of water injectors fixedly connected to the bottom of the frame, and a support mechanism for adjusting the water injection depth position at the top of the frame.

[0007] All water injectors are connected to the freshwater tank via water pipes. Electromagnetic regulating valves are connected inside the water pipes and are located between each water injector and the freshwater tank.

[0008] The seawater tank is connected to a drive unit, and the water pump is connected to the water tank.

[0009] It also includes a controller for inputting the current water injection depth position, which controls the opening and closing of the electromagnetic regulating valve based on the water injection depth position to regulate the delivery flow rate.

[0010] Furthermore, the support mechanism includes a bracket located above the water tank, a roller winding machine fixedly connected to the bracket, a pull rope wound on the roller winding machine, and a roller rotating at the top of the frame, with the pull rope slidingly engaging with the roller.

[0011] Furthermore, the water injector includes a central pipe fixedly connected to the bottom of the frame. The central pipe is connected to the freshwater tank through a water pipe. Baffles are fixedly connected to both sides of the central pipe. The baffles are located on the side of the central pipe away from the frame. Several horizontal flow ports are opened in the baffles and are connected to the central pipe.

[0012] A baffle plate is fixedly connected inside the central pipe, and several transfer holes are opened on the baffle plate.

[0013] Furthermore, a mating block is fixedly connected inside the central pipe, and a baffle plate is rotatably fitted on the top of the mating block. The baffle plate is located below the transfer hole, and a torsion spring is provided at the rotation point between the baffle plate and the mating block.

[0014] A connecting rod is fixedly connected to the end of the rotating shaft away from the fan blades. A ball bearing is rotatably fitted to the end of the connecting rod away from the fan blades. The ball bearing is rotatably fitted to the partition plate. A cavity is opened inside the partition plate. A reset plate is slidably fitted inside the cavity. The reset plate is sleeved on the rotating shaft. The reset plate is clearance fitted to the rotating shaft. A spring is provided at the end of the reset plate away from the ball bearing.

[0015] When the rotating shaft moves to the point furthest from the partition, the rotating shaft comes into contact with the partition.

[0016] Furthermore, several liquid level detection sensors for measuring the water level height in the freshwater tank are fixedly connected to the inner wall of the freshwater tank.

[0017] The controller is used to input and store the water pressure corresponding to the water level and the distribution position of the water injectors corresponding to each electromagnetic regulating valve. It compares the water pressure with the set standard pressure. If the water pressure is greater than the standard pressure, it sends an adjustment command to the electromagnetic regulating valve; if the water pressure is less than the standard pressure, it sends a fresh water replenishment command to the outside.

[0018] Furthermore, several pressure sensors are fixedly connected to the outer wall of the central pipe. The pressure sensors are used to measure the impact force data when the water flow in the tank comes into contact with the central pipe, and then send the impact force data to the controller.

[0019] The controller is also used to number the pressure sensors based on the distribution location of the water injectors, compare the impact force data corresponding to adjacent pressure sensors, calculate the fluctuation value corresponding to the adjacent impact force data, compare the fluctuation value with the set standard value, if the fluctuation value is greater than the standard value, then obtain the distribution location of the water injector based on the fluctuation value, and send an adjustment command to the solenoid regulating valve based on the distribution location, if the fluctuation value is less than the standard value, then send a maintenance command to the corresponding solenoid regulating valve based on the fluctuation value.

[0020] Furthermore, a speed sensor for real-time rotational speed of the shaft is provided outside the shaft, and the speed sensor is fixedly connected to the partition plate;

[0021] The controller is also used to input the reference rotation speed corresponding to the water flow rate after the electromagnetic regulating valve is adjusted, and then compare the real-time rotation speed of the shaft with the reference rotation speed. If they are consistent, a maintenance command is sent to the electromagnetic regulating valve; if they are inconsistent, a reference adjustment command is sent to the electromagnetic regulating valve.

[0022] Furthermore, the controller also includes a recording module, which is used to record the adjustment commands and comparison adjustment commands corresponding to each electromagnetic control valve;

[0023] The recording module is also used to draw a wave pattern based on the distribution location corresponding to the wave pattern and the impact force data corresponding to the distribution location within an interval when the fluctuation value is greater than the standard value. It calculates the difference between the peaks and troughs of the wave pattern and compares the difference with the set stable value. If the difference is greater than the stable value, a pause command is sent to all solenoid control valves; if the difference is less than the stable value, a maintenance command is sent to all solenoid control valves.

[0024] Furthermore, the top of the baffle plate has an inclined extension opening, which is connected to the horizontal flow opening. The side of the extension opening away from the central pipe is higher than the side of the extension opening close to the central pipe.

[0025] Furthermore, a threaded channel is fixedly connected to the inner wall of the central channel, and the rotation direction of the torsion spring is opposite to the arrangement direction of the threaded channel.

[0026] Furthermore, the seawater tank is equipped with a water quality analysis module for measuring seawater composition, and the water quality analysis module is electrically connected to the controller.

[0027] Furthermore, the frame is constructed from several triangular steel beams joined together, and the surface of the frame is coated with an anti-corrosion coating.

[0028] Furthermore, several heat exchange tubes are evenly arranged on the inner wall of the water tank, and the heat exchange tubes are connected to a refrigeration unit for transporting the refrigerant.

[0029] The above approach has the following beneficial effects:

[0030] 1. In this solution, the support mechanism drives the frame to move linearly in a horizontal direction, thereby adjusting the water injection depth position of the water injector on the frame in the water tank, so as to meet the water injection depth position adjustment needs of the multi-level water injection.

[0031] 2. In this scheme, during the process of freshwater being discharged from the freshwater tank through the central pipe via water pipes, a water injector is used to disperse the water flow in the central pipe to ensure the flow velocity of the freshwater flowing out through the horizontal flow outlet, thereby reducing the disturbance of the freshwater to the surrounding seawater layer and facilitating the formation of density stratification interfaces.

[0032] 3. This solution uses both electromagnetic regulating valves and water injectors to regulate the freshwater discharge process, maintaining the consistency of water flow velocity in the central pipes of each water injector. This reduces the obstruction of the transfer hole by the reset plate, thereby ensuring that each water injector discharges freshwater quickly, which facilitates the formation of density stratification interfaces.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is an isometric view of an embodiment of the rapid density stratification system for super-large water tanks according to the present invention;

[0035] Figure 2 for Figure 1 Axonometric view of the central water injector;

[0036] Figure 3 for Figure 1 Top view;

[0037] Figure 4 for Figure 3 Schematic diagram of the cross section along the AA direction;

[0038] Figure 5 for Figure 4 A magnified schematic diagram of part B in the middle.

[0039] The reference numerals in the accompanying drawings include: 1. Freshwater tank; 2. Frame; 21. Support; 3. Seawater tank; 4. Water injector; 41. Central pipe; 42. Transfer hole; 43. Fan blade; 44. Baffle plate; 45. Horizontal flow port; 46. Shielding plate; 5. Reset plate; 51. Ball bearing; 52. Spring. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The following detailed description illustrates the specific implementation method:

[0044] As attached Figures 1 to 5 The diagram illustrates a rapid density stratification system for ultra-large water tanks, comprising a tiered water injection mechanism located within a water tank. A freshwater tank 1 is positioned above the water tank, and a seawater tank 3 is positioned below it. The tiered water injection mechanism includes a frame 2, with several water injectors 4 fixedly connected to the bottom of the frame 2. A support mechanism for adjusting the water injection depth is located at the top of the frame 2. The support mechanism includes a bracket 21 located above the water tank, with a roller machine fixedly connected to the bracket 21. A pull rope is wound around the roller machine. A roller is rotatably fitted to the top of the frame 2, and the pull rope slides in conjunction with the roller. The frame 2 is constructed from several triangular steel beams, and its surface is coated with an anti-corrosion coating. In this embodiment, the anti-corrosion coating is a fluorotitanium paint coating.

[0045] Each of the water injectors 4 is connected to the freshwater tank 1 via a water pipe. An electromagnetic regulating valve (not shown in the figure) is connected inside the water pipe and is located between each water injector 4 and the freshwater tank 1. A driving component is connected to the seawater tank 3; in this embodiment, the driving component is a water pump, which is connected to the water tank. A controller is also included for recording the current water injection depth position. The controller controls the opening and closing of the electromagnetic regulating valves based on the water injection depth position to adjust the delivery flow rate.

[0046] The water injector 4 includes a central pipe 41 fixedly connected to the bottom of the frame 2. The central pipe 41 is connected to the freshwater tank 1 through a water pipe. Baffle plates 44 are fixedly connected to both sides of the central pipe 41. The baffle plates 44 are located on the side of the central pipe 41 away from the frame 2. Several horizontal flow ports 45 are opened in the baffle plates 44, and the horizontal flow ports 45 are connected to the central pipe 41. A partition is fixedly connected in the central pipe 41, and several transfer holes 42 are opened on the partition.

[0047] A mating block is fixedly connected inside the central pipe 41. A baffle plate 46 is rotatably fitted on the top of the mating block. The baffle plate 46 is located below the central hole 42. A torsion spring is provided at the rotation point of the baffle plate 46 and the mating block. One end of the torsion spring is fixedly connected to the baffle plate 46, and the other end of the torsion spring is fixedly connected to the mating block. A connecting rod is fixedly connected to the end of the rotating shaft away from the fan blade 43. A ball bearing 51 is rotatably fitted to the end of the connecting rod away from the fan blade 43. The ball bearing 51 is rotatably fitted with the partition plate. A cavity is opened inside the partition plate. A reset plate 5 is slidably fitted inside the cavity. The reset plate 5 is sleeved on the rotating shaft. The reset plate 5 is clearance fitted with the rotating shaft. A spring 52 is provided at the end of the reset plate 5 away from the ball bearing 51. One end of the spring 52 abuts against the reset plate 5, and the other end of the spring 52 is fixedly connected to the partition plate.

[0048] When the rotating shaft is propelled by the water flow in the central pipe 41 to the point furthest from the partition, the rotating shaft abuts against the baffle plate 46.

[0049] Several liquid level detection sensors for measuring the water level in freshwater tank 1 are fixedly connected to the inner wall of the freshwater tank 1; the controller is used to input and store the water flow pressure corresponding to the water level and the distribution position of each electromagnetic regulating valve corresponding to the water injector 4, compare the water flow pressure with the set standard pressure, and if the water flow pressure is greater than the standard pressure, send an adjustment command to the electromagnetic regulating valve; if the water flow pressure is less than the standard pressure, send a freshwater replenishment command to the outside.

[0050] For example, by determining the water level inside freshwater tank 1 and the water pressure at the bottom of freshwater tank 1, the basic flow velocity of the water flowing in the water pipe is determined. This velocity is then controlled by an electromagnetic regulating valve to regulate the outflow velocity at the horizontal flow outlet 45, ensuring the stability of the water flow at the outlet 45 and reducing disturbance to the upper and lower stratified seawater layers caused by the discharged water flow. Multiple water injectors 4 provide rapid and stable water injection to ensure the rapid arrangement of the density stratification interface.

[0051] The seawater tank 3 is equipped with a water quality analysis module for measuring seawater composition, and the water quality analysis module is electrically connected to the controller. Several heat exchange tubes are also evenly arranged on the inner wall of the tank, and these heat exchange tubes are connected to a refrigeration unit for transporting the refrigerant. The refrigeration unit is existing technology and will not be described in detail in this embodiment.

[0052] The specific implementation process is as follows:

[0053] First, during the adjustment of the water injection depth in frame 2, the roller machine on support 21 drives the pull rope to wind and move. The pull rope horizontally drives frame 2 to move linearly, thereby adjusting the water injection depth position of the water injector 4 on frame 2 in the water tank to meet the water injection depth adjustment requirements of the multi-level water injection system. Frame 2 is spliced ​​together using several triangular steel beams, ensuring the structural stability of frame 2 while reducing the overall weight of the multi-level water injection mechanism, facilitating its movement within the water tank. Furthermore, an anti-corrosion coating is used to reduce seawater corrosion of frame 2, extending its service life.

[0054] During the process of freshwater being discharged from the freshwater pool 1 through the central pipe 41 via the water pipe, the baffle plate 44 is used to disperse the water flow in the central pipe 41 to ensure the flow speed of the freshwater flowing out through the horizontal flow outlet 45, thereby reducing the disturbance of the freshwater to the surrounding seawater layer and facilitating the formation of the density stratification interface.

[0055] During the continuous flow of water in the central pipe 41, when the water comes into contact with the fan blade 43, in addition to the water flowing along the arc surface of the fan blade 43 and exerting a reaction force on the fan blade 43 to drive the rotating shaft to move, the impact force of the water flow will also push the fan blade 43 to move the rotating shaft closer to the side of the baffle plate 46. The faster the water flow speed in the central pipe 41, the faster the rotation speed of the fan blade 43, the greater the linear pushing force on the rotating shaft, and the longer the rotating shaft moves.

[0056] During the downward spiral movement of the rotating shaft, the ball bearings 51 reduce the frictional force between the rotating shaft and the reset plate 5, facilitating the movement of the rotating shaft driven by the fan blades 43. At this time, the reset plate 5 overcomes the resistance applied by the spring 52, causing the rotating shaft to contact the surface of the baffle plate 46. Through the frictional force between the rotating shaft and the baffle plate 46, the rotating shaft drives the baffle plate 46 to rotate, causing the baffle plate 46 to block the central transfer hole 42, thereby slowing down the water flow rate in the central pipe 41 or temporarily blocking the central transfer hole 42. When the rotation speed of the fan blades 43 slows down or the rotating shaft no longer contacts the baffle plate 46, the torsion spring drives the reset plate 5 to reset, restoring the connection of the central transfer hole 42, thereby regulating the stability of the liquid flow rate discharged from the central pipe 41 and reducing the interference of the liquid on the surrounding environment.

[0057] Simultaneously, the water quality analysis module analyzes the composition of the modulated seawater to determine its salinity, facilitating the mixing and control of freshwater to achieve target density stratification. The cooling medium is transported through heat exchange tubes, meeting the requirement for overall cooling of the ambient temperature seawater in the tank and ensuring uniform temperature stratification across the pool's horizontal direction. This provides a marine environment simulation platform for the research and testing of deep-sea equipment.

[0058] In another embodiment, a number of pressure sensors are fixedly connected to the outer wall of the central pipe 41. The pressure sensors are used to measure the impact force data when the water flow in the water tank comes into contact with the central pipe 41, and then send the impact force data to the controller.

[0059] The controller is also used to number the pressure sensors based on the distribution location of the water injector 4, compare the impact force data corresponding to adjacent pressure sensors, calculate the fluctuation value corresponding to the adjacent impact force data, compare the fluctuation value with the set standard value, if the fluctuation value is greater than the standard value, then obtain the distribution location corresponding to the water injector 4 based on the fluctuation value, and send an adjustment command to the solenoid regulating valve based on the distribution location; if the fluctuation value is less than the standard value, then send a maintenance command to the corresponding solenoid regulating valve based on the fluctuation value.

[0060] For example, during the freshwater injection process, changes in external factors such as ambient temperature and liquid level fluctuations may cause localized increases in flow velocity during the discharge of freshwater from each injector 4. By determining the changes in water flow velocity in the current area, the flow rate discharged from each injector 4 can be reduced to minimize localized interference from the discharged freshwater in the current area, thereby ensuring the stability of the density stratification interface and facilitating its stable formation.

[0061] In another embodiment, a speed sensor for real-time rotational speed of the shaft is provided outside the shaft, and the speed sensor is fixedly connected to the partition plate; the controller is also used to input the reference speed corresponding to the water flow rate after the electromagnetic regulating valve is adjusted, and then compare the real-time rotational speed of the shaft with the reference speed. If they are consistent, a maintenance command is sent to the electromagnetic regulating valve; if they are inconsistent, a reference adjustment command is sent to the electromagnetic regulating valve. In this embodiment, the generation of the reference adjustment command based on the reference speed and the real-time rotational speed of the shaft is the prior art, and will not be described in detail in this embodiment.

[0062] For example, due to the arrangement of the pipeline structure, such as changes in pipe diameter, pipe bending, and pipe roughness, different water pipe positions may have different flow velocities. Therefore, by comparing the consistency between the flow velocity regulation control of the electromagnetic regulating valve and the rotation of the fan blade 43, it is possible to determine whether the regulation of the electromagnetic regulating valve is accurate. Further control is achieved by adjusting the flow rate of the electromagnetic regulating valve to maintain the consistency of the water flow velocity in the central pipe 41 of each water injector 4, so as to reduce the obstruction of the central transfer hole 42 by the reset plate 5, thereby ensuring that each water injector 4 discharges fresh water quickly, so as to facilitate the formation of density stratification interface.

[0063] In other embodiments, the controller further includes a recording module, which is used to record the adjustment commands and comparison adjustment commands corresponding to each electromagnetic control valve; the recording module is also used to, when the fluctuation value is greater than the standard value, draw a wave pattern based on the distribution position corresponding to the fluctuation value and the impact force data corresponding to the distribution position within an interval, calculate the difference between the peaks and troughs of the wave pattern, compare the difference with the set stable value, and if the difference is greater than the stable value, send a pause command to all electromagnetic control valves; if the difference is less than the stable value, send a maintain command to all electromagnetic control valves.

[0064] For example, during the continuous water injection process through each water injector 4, due to the influence of external factors, the local water body may still fluctuate after the water injection volume is reduced. By temporarily stopping the water injection to reduce the impact on the original water body, the work can be continued after the water body returns to calm, thereby facilitating the stable formation of the density stratification interface.

[0065] In some embodiments, the top of the baffle plate 44 has an inclined extension opening that communicates with the horizontal flow port 45, and the side of the extension opening away from the central pipe 41 is higher than the side of the extension opening close to the central pipe 41.

[0066] The specific implementation process is as follows: The inclined extension port is connected to the horizontal flow port 45 to provide water flow transportation space for the frame 2 and water injector 4 to remove the water tank, reduce the interference of the plane of the baffle plate 44 on the surrounding water flow, and ensure the stability of water density stratification.

[0067] In other embodiments, a threaded channel (not shown in the figure) is fixedly connected to the inner wall of the central channel, and the rotation direction of the torsion spring is opposite to the arrangement direction of the threaded channel.

[0068] The specific implementation process is as follows: the water flow formed by the threaded channel is directed in the opposite direction to the water flow formed by the rotation of the torsion spring, thereby reducing the impact of the water flow discharged through the horizontal flow port 45, so as to reduce the interference of the water flow to the surrounding environment when it is discharged, and to ensure the formation of the density stratification interface.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rapid density stratification system for super-large water tanks, comprising a rapid water injection mechanism located in a water tank, a freshwater tank (1) above the water tank, and a seawater tank (3) below the water tank, characterized in that, The multi-level water injection mechanism includes a frame (2), a number of water injectors (4) are fixedly connected to the bottom of the frame (2), and a support mechanism for adjusting the water injection depth is provided on the top of the frame (2). All water injectors (4) are connected to the freshwater tank (1) through water pipes. Electromagnetic regulating valves are connected inside the water pipes. The electromagnetic regulating valves are located between each water injector (4) and the freshwater tank (1). The seawater pool (3) is connected to a drive unit, and the water pump is connected to the water tank; It also includes a controller for inputting the current water injection depth position, which controls the opening and closing of the electromagnetic regulating valve based on the water injection depth position to regulate the delivery flow rate.

2. The rapid density stratification system for ultra-large water tanks with stepped water injection as described in claim 1, characterized in that, The support mechanism includes a bracket (21) located above the water tank, a roller machine is fixedly connected to the bracket (21), a pull rope is wound on the roller machine, a roller is rotated on the top of the frame (2), and the pull rope and the roller slide together.

3. The rapid density stratification system for ultra-large water tanks with stepped water injection as described in claim 2, characterized in that, The water injector (4) includes a central pipe (41) fixedly connected to the bottom of the frame (2). The central pipe (41) is connected to the freshwater tank (1) through a water pipe. Baffle plates (44) are fixedly connected to both sides of the central pipe (41). The baffle plates (44) are located on the side of the central pipe (41) away from the frame (2). Several horizontal flow ports (45) are opened in the baffle plates (44). The horizontal flow ports (45) are connected to the central pipe (41). A partition is fixedly connected inside the central pipe (41), and several transfer holes (42) are opened on the partition.

4. The rapid density stratification system for ultra-large water tanks with stepped water injection as described in claim 3, characterized in that, A mating block is also fixedly connected inside the central pipe (41). A baffle plate (46) is rotatably mated on the top of the mating block. The baffle plate (46) is located below the central hole (42). A torsion spring is provided at the rotation point between the baffle plate (46) and the mating block. A connecting rod is fixedly connected to the end of the rotating shaft away from the fan blade (43). A ball bearing (51) is rotatably fitted to the end of the connecting rod away from the fan blade (43). The ball bearing (51) is rotatably fitted with the partition plate. A cavity is opened in the partition plate. A reset plate (5) is slidably fitted in the cavity. The reset plate (5) is sleeved on the rotating shaft. The reset plate (5) is clearance fitted with the rotating shaft. A spring (52) is provided at the end of the reset plate (5) away from the ball bearing (51). When the rotating shaft moves to the point furthest from the partition, the rotating shaft comes into contact with the baffle (46).

5. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 4, characterized in that, Several liquid level detection sensors for measuring the water level height inside the freshwater tank (1) are fixedly connected to the inner wall of the freshwater tank (1); The controller is used to input and store the water pressure corresponding to the water level and the distribution position of the water injector (4) corresponding to each electromagnetic regulating valve. It compares the water pressure with the set standard pressure. If the water pressure is greater than the standard pressure, it sends a regulating command to the electromagnetic regulating valve. If the water pressure is less than the standard pressure, it sends a fresh water replenishment command to the outside.

6. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 5, characterized in that, Several pressure sensors are fixedly connected to the outer wall of the central pipe (41). The pressure sensors are used to measure the impact force data when the water flow in the water tank comes into contact with the central pipe (41), and then send the impact force data to the controller. The controller is also used to number the pressure sensors based on the distribution location of the water injector (4), compare the impact force data corresponding to adjacent pressure sensors, calculate the fluctuation value corresponding to adjacent impact force data, compare the fluctuation value with the set standard value, if the fluctuation value is greater than the standard value, then obtain the distribution location corresponding to the water injector (4) based on the fluctuation value, and send the adjustment command to the electromagnetic regulating valve based on the distribution location, if the fluctuation value is less than the standard value, then send the maintenance command to the corresponding electromagnetic regulating valve based on the fluctuation value.

7. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 6, characterized in that, A speed sensor for real-time rotational speed of the shaft is provided on the outside of the shaft, and the speed sensor is fixedly connected to the partition plate; The controller is also used to input the reference rotation speed corresponding to the water flow rate after the electromagnetic regulating valve is adjusted, and then compare the real-time rotation speed of the shaft with the reference rotation speed. If they are consistent, a maintenance command is sent to the electromagnetic regulating valve; if they are inconsistent, a reference adjustment command is sent to the electromagnetic regulating valve.

8. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 7, characterized in that, The controller also includes a recording module, which is used to record the adjustment commands and reference adjustment commands corresponding to each solenoid control valve; The recording module is also used to draw a wave pattern based on the distribution location corresponding to the wave pattern and the impact force data corresponding to the distribution location within an interval when the fluctuation value is greater than the standard value. It calculates the difference between the peaks and troughs of the wave pattern and compares the difference with the set stable value. If the difference is greater than the stable value, a pause command is sent to all solenoid control valves; if the difference is less than the stable value, a maintenance command is sent to all solenoid control valves.

9. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 8, characterized in that, The top of the baffle plate (44) has an inclined extension opening, which is connected to the horizontal flow opening (45). The side of the extension opening away from the central pipe (41) is higher than the side of the extension opening close to the central pipe (41).

10. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 10, characterized in that, The inner wall of the central channel is fixedly connected with a threaded channel, and the rotation direction of the torsion spring is opposite to the arrangement direction of the threaded channel.

11. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 11, characterized in that, The seawater pool (3) is equipped with a water quality analysis module for measuring seawater composition. The water quality analysis module is electrically connected to the controller.

12. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 11, characterized in that, The frame (2) is made of several triangular steel beams spliced ​​together, and the surface of the frame (2) is coated with an anti-corrosion coating.

13. The rapid density stratification system for ultra-large water tanks with stepped water injection according to claim 12, characterized in that, The inner wall of the water tank is also evenly arranged with several heat exchange tubes, which are connected to a refrigeration unit for transporting the refrigerant.

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