Disturbance self-adaptive stable floating plate for fused salt single tank

Abstract

The invention provides a disturbance self-adaptive stable floating plate for a fused salt single tank, and belongs to the technical field of fused salt energy storage. The disturbance self-adaptive stable floating plate comprises a floating plate body with a cavity, two stabilizing devices which are orthogonally arranged up and down are arranged in the cavity, and the disturbance of the floating plate is dynamically inhibited in a two-dimensional plane through orthogonal linkage. Each stabilizing device comprises a sliding rail, a permanent magnet sliding block and a magnetic triggering mechanism, and each magnetic triggering mechanism comprises a disturbance triggering unit and a damping generation unit. The disturbance triggering unit contains a liquid conducting medium, responds to the inclination of the floating plate to generate liquid level deviation and generates a position feedback signal; the damping generation unit comprises a dynamic magnetic source, generates a changing magnetic field based on a position signal, and drives the permanent magnet sliding block to slide towards the relatively rising side of the sliding rail. When the floating plate is disturbed, the sliding rail generates large repulsive force relative to the magnetic triggering mechanism on the sinking side, so that the permanent magnet sliding block moves to restrain disturbance. The stability and safety of the fused salt single-tank energy storage system can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of single-tank molten salt energy storage, in particular to a disturbance self-adaptive stable floating plate for a molten salt single tank. BACKGROUND

[0002] With the rapid development of renewable energy, molten salt energy storage technology has been widely used in the field of solar thermal power generation and other fields due to its high energy density, long service life and low cost. In the molten salt energy storage system, the single-tank molten salt energy storage technology realizes the stratified storage of cold and hot molten salts in the same tank by utilizing the density difference of molten salts. Compared with the traditional double-tank system, it has the advantages of small footprint and low construction cost.

[0003] In the single-tank molten salt energy storage system, in order to effectively separate the cold and hot molten salts and reduce heat transfer, a floating plate is usually arranged at the interface between the cold and hot molten salts. In the prior art, such as CN117367184A, a single-tank molten salt heat storage device is disclosed, which designs a composite heat insulation plate with a density between the high-temperature molten salt and the low-temperature molten salt and good heat insulation performance. The composite heat insulation layer will naturally hover between the high-temperature molten salt and the low-temperature molten salt in the single-tank molten salt tank, forming a good thermal stratification effect. The device also designs a rectifier grid to make the molten salt quickly reduce disturbance and form stable parallel flow after entering the tank, promoting the composite heat insulation plate to move up and down nearly horizontally.

[0004] However, in actual application, due to the continuous entry and exit of cold and hot molten salts during storage and heat release, the floating plate is often tilted or shaken by various disturbances. The prior art lacks effective self-adaptive stabilization mechanisms to suppress these disturbances, which may cause the floating plate to malfunction and fail to move normally, or the cold and hot molten salts to mix in the gap caused by the tilting of the floating plate, seriously affecting the overall energy storage effect of the tank.

[0005] In the field of liquid level detection and control, there are various technical solutions. For example, CN210071072U discloses a liquid level detection device for a liquid storage tank, which includes a magnetic control component, a float, a pulley, a fixed component, a magnetic reed switch and a signal transmitter. The magnetic control component and the magnetic reed switch can automatically send an alarm signal through the signal transmitter. CN206410759U provides a liquid level detection device, which includes a float, a float guide rod, a fixed frame, a sliding rail and a signal sensing device. The high and low of the liquid level is detected through the inductive action between the inductor and the inductive block.

[0006] Although the above-mentioned technologies provide certain solutions in the field of liquid level detection and control, these technologies mainly focus on the detection and alarm of the liquid level and do not provide effective solutions for the disturbance stabilization problem of the floating plate in the molten salt single tank. The existing floating plate design lacks self-adaptive adjustment capability for disturbances and cannot quickly recover to the balanced state when disturbed, resulting in the following problems: 1. The floating plate is prone to tilting under disturbance, causing the hot and cold molten salts to mix at the tilted part, reducing the thermal efficiency of the system; 2. The floating plate has poor stability and may shake violently or even overturn when the molten salt flows violently; 3. Lack of effective self-adaptive adjustment mechanism, unable to automatically adjust the stabilizing force according to the disturbance degree; 4. The existing floating plate structure is complex, difficult to maintain, and has a limited service life.

[0007] Therefore, there is an urgent need for a stable floating plate that can adaptively suppress disturbance to improve the operational stability and energy storage efficiency of a single-tank molten salt energy storage system. SUMMARY

[0008] To solve the technical problem that in a single-tank molten salt energy storage system, the continuous entry and exit of cold and hot molten salts during storage and heat release causes disturbance of the floating plate inside the storage tank, which may cause the floating plate to fail to move up and down, or the cold and hot molten salts to mix at the tilted gap, affecting the overall energy storage effect of the storage tank, and to achieve the technical effect of effectively suppressing floating plate vibration and improving system stability and energy storage effect, the present application provides a disturbance self-adaptive stable floating plate for a molten salt single tank.

[0009] The first aspect of the present application provides a disturbance self-adaptive stable floating plate for a molten salt single tank, comprising a floating plate body, the floating plate body comprising a cavity, two stabilizing devices arranged orthogonally in the cavity, the two stabilizing devices being connected by orthogonal linkage to dynamically suppress floating plate disturbance in a two-dimensional plane. The stabilizing device comprises a slide rail arranged in the cavity, a sliding block arranged on the slide rail, and a triggering mechanism for controlling the sliding block to slide on the slide rail to suppress floating plate disturbance.

[0010] In an embodiment of the present application, the sliding block is a permanent magnetic sliding block; the triggering mechanism is a magnetic triggering mechanism, which is used to generate a magnetic field that generates a repulsive force on the permanent magnetic sliding block.

[0011] In an embodiment of the present application, one magnetic triggering mechanism is arranged at each end of the sliding direction of the slide rail; The repulsive forces generated by the two magnetic triggering mechanisms on the permanent magnetic sliding block are F1 and F2, respectively; The floating plate is in a static state or a disturbed state; when the floating plate is in a static state, F1=F2; when the floating plate is in a disturbed state, the repulsive force generated by the magnetic triggering mechanism on the permanent magnetic sliding block on the side of the slide rail relative to the sinking side is greater than the repulsive force generated by the magnetic triggering mechanism on the permanent magnetic sliding block on the side of the slide rail relative to the rising side.

[0012] In an embodiment of the present application, the magnetic triggering mechanism comprises: The disturbance triggering unit comprises a container containing a liquid conductive medium, and the conductive liquid generates a position feedback signal in response to a liquid level shift caused by the inclination of the floating plate body; The damping generating unit comprises a dynamic magnetic source arranged in the cavity, and generates a variable magnetic field based on the position signal to generate a driving magnetic field for the permanent magnetic slider to slide towards the relatively rising side of the slide rail.

[0013] In an embodiment of the present application, the dynamic magnetic source comprises an iron core and a coil wound on the iron core, the coil has a first end and a second end, and N taps are led between the first end and the second end, N being an integer greater than 0; wherein the first end is connected to a power supply; The disturbance triggering unit comprises: A fixed electrode, one end of which is inserted into the liquid conductive medium, and the other end of which is connected to the power supply; A multi-stage liquid level detection electrode assembly comprising at least two liquid level detection electrodes arranged at different height positions; among the at least two liquid level detection electrodes arranged at different height positions, the liquid level detection electrode with the highest height position is connected to the second end, and each of the remaining liquid level detection electrodes is connected to a different coil tap; Wherein, the power supply, the fixed electrode, the liquid level detection electrode, and the coil are sequentially and sequentially connected to form a loop; the total number of turns of the coil connected in the loop when one end of the slide rail is relatively sinking is greater than the total number of turns of the coil connected in the loop when the one end of the slide rail is relatively rising.

[0014] In an embodiment of the present application, the at least two liquid level detection electrodes are sequentially arranged in a direction from high to low in height position, and the arrangement direction is consistent with the sliding direction of the slide rail; the height position of the liquid level detection electrode connected in the loop is proportional to the total number of turns of the coil connected in the corresponding loop.

[0015] In an embodiment of the present application, the multi-stage liquid level detection electrode assembly comprises (N+1) liquid level detection electrodes arranged at different height positions.

[0016] In an embodiment of the present application, the power supply is a thermoelectric element.

[0017] In an embodiment of the present application, the floating plate body is wrapped with a ferromagnetic material.

[0018] The second aspect of the present application provides a single-tank molten salt energy storage system, comprising a molten salt single tank, and the molten salt single tank is provided with the above-mentioned disturbance self-adaptive stable floating plate.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects: 1. The disturbance adaptive stable floating plate for the single tank of molten salt can detect the dumping of the inside of the storage tank caused by the external environment, the relative height change of the liquid surface in the disturbance trigger unit in the stable device changes the magnetic field intensity of the dynamic magnetic source in the trigger device on both sides, pushes the sliding block to move to the high position, generates the damping of inhibiting the disturbance of the platform, provides the stability, stabilizes the gravity center in the plane, and has good adjustment effect.

[0020] 2. The disturbance adaptive stable floating plate for the single tank of molten salt has the integrated design that each chamber is relatively independent and does not interfere with each other, does not increase additional structures and equipment in the inside of the storage tank, and reduces the overall manufacturing cost of the single tank of molten salt.

[0021] The disturbance adaptive stable floating plate for the single tank of molten salt has the two stable devices arranged in the upper and lower directions in the floating plate body, can effectively inhibit the vibration of the floating plate in the two-dimensional plane, stabilizes the gravity center in the plane, has good adjustment effect, and avoids the problem that the floating plate cannot move up and down due to failure.

[0022] 2. The disturbance adaptive stable floating plate for the single tank of molten salt has the design of the magnetic trigger mechanism and the permanent magnetic sliding block, has fast response speed, high reliability, small contact resistance, can quickly respond to the disturbance of the floating plate and perform adaptive adjustment.

[0023] 3. The disturbance adaptive stable floating plate for the single tank of molten salt has the integrated design that each chamber is relatively independent and does not interfere with each other, does not increase additional structures and equipment in the inside of the storage tank, and reduces the overall manufacturing cost of the single tank of molten salt.

[0024] 4. The disturbance adaptive stable floating plate for the single tank of molten salt can detect the dumping of the inside of the storage tank caused by the external environment, the relative height change of the liquid surface changes the magnetic field intensity of the dynamic magnetic source in the trigger device on both sides, pushes the sliding block to move to the high position, generates the damping of inhibiting the disturbance of the platform, provides the stability, effectively prevents the mixing of the cold and hot molten salt from the gap of dumping, and improves the overall energy storage effect of the storage tank.

[0025] 5. Compared with the prior art, the disturbance adaptive stable floating plate for the single tank of molten salt has simple structure, does not need external energy supply, can use the thermoelectric element as the power supply, realizes self-powered operation, and is suitable for various single tank of molten salt energy storage systems. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structural schematic view of the single tank of molten salt floating plate heat storage system is provided for the embodiment of the present application. Figure 2 The structural schematic view of the disturbance adaptive stable floating plate is provided for the embodiment of the present application. Figure 3A structural schematic diagram of the magnetic trigger mechanism provided in the embodiments of the present application is shown in the figure. The figure shows: 01-single tank molten salt storage tank; 011-hot salt area; 012-cold salt area; 02-floating plate; 03-energy input device; 04-energy output device; 05-heat storage pump; 06-heat release pump; 1-input; 2-output; 020-cavity; 021-upper stabilizing device; 022-lower stabilizing device; 023-floating plate wall; 0211-first magnetic trigger mechanism; 0212-rail; 0213-sliding block; 0214-second magnetic trigger mechanism; 101-power supply; 102-disturbance trigger unit; 103-fixed electrode; 104-liquid conductive medium; 105-control wire; 106-level detection electrode; 107-connection wire; 108-coil; 109-iron core. DETAILED DESCRIPTION

[0027] The present application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These are within the scope of the present application.

[0028] The present application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These are within the scope of the present application.

[0029] EMBODIMENT The present embodiment provides a disturbance self-adaptive stabilizing floating plate for a molten salt single tank, which comprises a floating plate body, the floating plate body comprises a cavity 020, two stabilizing devices arranged orthogonally in the cavity 020, and the two stabilizing devices are connected in series to dynamically suppress the disturbance of the floating plate in a two-dimensional plane. The two stabilizing devices are respectively an upper stabilizing device 021 and a lower stabilizing device 021.

[0030] Specifically, the floating plate body is a circular structure, the outer wall is matched with the inner wall of the molten salt single tank, and the two stabilizing devices inside the floating plate body are arranged along the X-axis direction and the Y-axis direction respectively and perpendicular to each other, forming an upper and lower orthogonal arrangement. The two stabilizing devices are connected in series, and can dynamically suppress the disturbance of the floating plate in a two-dimensional plane.

[0031] Each stabilizing device comprises a rail 0212 arranged in the cavity 020, a sliding block arranged on the rail 0212, and a trigger mechanism. The sliding block can freely slide on the rail 0212, and the trigger mechanism is used to control the sliding block to slide on the rail 0212 to suppress the disturbance of the floating plate. The components in the two stabilizing devices are symmetrically arranged at both ends of the rail 0212.

[0032] When the floating plate is subjected to external disturbance, such as molten salt liquid fluctuation or external impact, the floating plate will tilt or sway. At this time, the trigger mechanism will sense the disturbance and control the movement of the slider on the slide rail 0212, generate a torque to offset the disturbance by changing the internal mass distribution of the floating plate, so as to restore the stable state of the floating plate.

[0033] Since the two stabilizing devices are arranged along the X-axis and Y-axis directions respectively, they can work together to suppress disturbances in any direction in the two-dimensional plane. For example, when the floating plate tilts along the X-axis direction, the X-axis direction stabilizing device will respond first; when the floating plate tilts along the Y-axis direction, the Y-axis direction stabilizing device will respond first; when the floating plate tilts in any direction, the two stabilizing devices will work together in proportion according to the tilt component size to suppress the disturbance.

[0034] This design enables the floating plate to have adaptive stability, which can automatically adjust the internal mass distribution according to the direction and size of the disturbance, realize dynamic stability, and ensure the stability of the floating plate in the molten salt single tank.

[0035] The wall thickness of the floating plate body in this embodiment is 5-20 mm, and the material is a metal material with good molten salt corrosion resistance, such as 347H steel.

[0036] The slide rail 0212 in this embodiment adopts a conical or planar design, with a width of 1 / 10-1 / 6 of the diameter of the floating plate, and the surface is coated with oil lubricant to reduce friction with the slider. The slide rail 0212 is made of high-temperature resistant alloy material and can withstand high temperature in the molten salt environment.

[0037] The slider in this embodiment is a permanent magnetic slider; the trigger mechanism is a magnetic trigger mechanism, which is used to generate a magnetic field that generates a variable repulsive force on the permanent magnetic slider.

[0038] The magnetic trigger mechanism can generate a variable magnetic field that generates a repulsive force on the permanent magnetic slider. When the floating plate is in a static state, the magnetic field generated by the magnetic trigger mechanism remains stable, and the permanent magnetic slider is in a balanced position. When the floating plate is disturbed, the magnetic trigger mechanism will adjust the magnetic field strength according to the disturbance, change the repulsive force on the permanent magnetic slider, and drive the permanent magnetic slider to move on the slide rail 0212, thereby generating a torque to offset the disturbance. This design based on magnetic force driving has the advantages of fast response speed, no mechanical wear, strong adaptability, etc. Since there are no complex mechanical transmission components, the system has high reliability and low maintenance cost, and is particularly suitable for long-term stable work in the high-temperature corrosive environment of molten salt.

[0039] Specifically, the permanent magnetic slider in this embodiment is a permanent magnetic material with strong magnetic field, such as rubidium iron boron material. Further, the surface of the permanent magnetic slider is coated with a high-temperature resistant and corrosion resistant coating to adapt to the molten salt environment.

[0040] In an embodiment, the slider adopts a rectangular design, with a length of 1 / 10-1 / 8 of the diameter of the floating plate and a width of 4 / 5-5 / 6 of the sliding rail 0212, and a tapered notch is formed at the bottom to fit the sliding rail 0212.

[0041] The two ends of the sliding rail 0212 in the embodiment are respectively provided with a magnetic trigger mechanism, namely a first magnetic trigger mechanism 0211 and a second magnetic trigger mechanism 0214, and each magnetic trigger mechanism can be independently controlled. The repulsive forces of the two magnetic trigger mechanisms on the permanent magnetic slider are respectively F1 and F2. The floating plate is in a static state or a disturbed state.

[0042] When the floating plate is in a static state, F1=F2, the permanent magnetic slider is in the middle position of the sliding rail 0212, and the system is in a balanced state. When the floating plate is in a disturbed state, the repulsive force of the magnetic trigger mechanism on the sinking side of the sliding rail 0212 on the permanent magnetic slider is greater than that of the magnetic trigger mechanism on the rising side. Specifically, when the inclination occurs, the sliding rail 0212 will tilt with the floating plate. At this time, the magnetic trigger mechanism on the sinking side of the sliding rail 0212 will increase the magnetic field strength and generate a greater repulsive force on the permanent magnetic slider, while the magnetic trigger mechanism on the rising side will decrease the magnetic field strength and generate a smaller repulsive force on the permanent magnetic slider. For example, when the left side sinks, the repulsive force F1 generated by the left magnetic trigger mechanism can increase to 1.5T, and the repulsive force F2 generated by the right magnetic trigger mechanism can decrease to 0.6T. Under the action of this unbalanced force, the permanent magnetic slider will move to the side of the sliding rail 0212 relative to the rising side, change the mass distribution inside the floating plate, and generate a moment opposite to the disturbance direction, thereby offsetting the disturbance and restoring the floating plate to a balanced state.

[0043] This design takes advantage of the non-contact characteristics of magnetic force, avoiding direct contact and wear of mechanical parts, and improving the reliability and service life of the system. At the same time, by adjusting the magnetic field strength of the magnetic trigger mechanisms at both ends, accurate response to different intensity disturbances can be achieved, improving the adaptability and stability of the system.

[0044] The dynamic magnetic source is arranged reversely between the poles of the corresponding slider, i.e. N-S, S-N, N-S, or S-N, N-S, S-N. When static, the repulsive force F1 of the first trigger device on the slider is equal to the repulsive force F2 of the second trigger device on the slider.

[0045] The magnetic trigger mechanism in the embodiment includes: The disturbance triggering unit 102 includes a container containing a liquid conductive medium 104. The conductive liquid generates a liquid level shift in response to the inclination of the floating plate body, generating a position feedback signal. When the floating plate body is in a horizontal state, the surface of the liquid conductive medium 104 in the container also remains horizontal. When the floating plate is disturbed and inclined, the container also tilts, causing the surface of the liquid conductive medium 104 in the container to shift relative to the container, with the liquid level rising on one side of the container and falling on the other side. This liquid level shift can be detected by electrodes placed at different heights in the container, thereby generating a position feedback signal.

[0046] The damping generation unit includes a dynamic magnetic source located in the cavity 020. Based on the position signal, it generates a changing magnetic field to generate a driving magnetic field for the permanent magnetic slider, driving the permanent magnetic slider to slide towards the relatively rising side of the slide rail 0212.

[0047] The dynamic magnetic source can be an electromagnet, which adjusts the magnetic field strength by changing the current through the coil 108. The dynamic magnetic source receives the position feedback signal from the disturbance triggering unit 102 and adjusts the magnetic field strength according to the signal strength to generate a changing magnetic field.

[0048] When the floating plate is inclined, the disturbance triggering unit 102 detects the liquid level shift and generates a position feedback signal. The damping generation unit adjusts the magnetic field strength according to this signal to generate a stronger magnetic field on the relatively sinking side of the slide rail 0212, exerting a greater repulsive force on the permanent magnetic slider and driving it to slide towards the relatively rising side of the slide rail 0212. The movement of the permanent magnetic slider changes the mass distribution inside the floating plate, generating a torque that counteracts the disturbance and restores the floating plate to a balanced state.

[0049] This disturbance detection method based on the liquid conductive medium 104, combined with dynamic magnetic field driving, forms a closed-loop control system that can sense the disturbance state of the floating plate in real time and make corresponding adjustments, improving the response speed and stability of the system.

[0050] Specifically, the container containing the liquid conductive medium 104 is a closed horizontal glass tube with a diameter of 1 / 8 to 1 / 5 the width of the stabilizing device.

[0051] Specifically, during the horizontal static process, the liquid level of the liquid conductive medium 104 is at 1 / 6 to 1 / 3 of the height inside the container. The liquid conductive medium 104 is a liquid that remains in a liquid state at room temperature and has good electrical conductivity, such as mercury or salt solution.

[0052] In an embodiment, the dynamic magnetic source comprises a core 109 and a coil 108 wound on the core 109, the coil 108 having a first end and a second end, and leading out N taps between the first end and the second end, N being an integer greater than 0; wherein the first end is connected to the power supply 101 through a connecting wire 107.

[0053] The disturbance triggering unit 102 comprises: a fixed electrode 103, one end of which is inserted into the liquid conductive medium 104, and the other end of which is connected to the power supply 101; a multi-stage liquid level detection electrode 106 assembly, comprising at least two liquid level detection electrodes 106 arranged at different height positions; among the at least two liquid level detection electrodes 106 arranged at different height positions, the liquid level detection electrode 106 at the highest height position is connected to the second end, and each of the remaining liquid level detection electrodes 106 is correspondingly connected to a different tap of the coil 108; Wherein, the power supply 101, the fixed electrode 103, the liquid level detection electrode 106, and the coil 108 are sequentially and sequentially connected to form a loop; the total number of turns of the coil 108 connected in the loop when one end of the slide rail 0212 is relatively sinking is greater than the total number of turns of the coil 108 connected in the loop when the one end of the slide rail 0212 is relatively rising.

[0054] Specifically, in the present embodiment, the liquid level detection electrode comprises a long strip-shaped structure made of a non-conductive material and having a height, which is vertically installed in the container, specifically, one end is fixedly installed at the bottom of the container, and the other end is provided with a signal electrode.

[0055] In an embodiment, the at least two liquid level detection electrodes 106 are sequentially arranged in a direction from high to low in height position, and the arrangement direction is consistent with the sliding direction of the slide rail 0212. This arrangement ensures that when the container tilts with the floating plate, the change of the liquid level can be detected by the liquid level detection electrodes 106 at different heights in a certain rule. For example, when the left side of the container sinks, the liquid level on the left side rises, which may cause the liquid level electrode at a higher height position to be immersed in the liquid; when the right side of the container sinks, the liquid level on the right side rises, which may cause more liquid level detection electrodes 106 at a lower height position to be immersed in the liquid.

[0056] In an embodiment, the height position of the liquid level detection electrode 106 connected in the loop is proportional to the total number of turns of the coil 108 connected in the corresponding loop. For example, electrode A (with the highest height position) is connected to the second end of the coil 108, and the total number of turns of the corresponding coil 108 is 500 turns; electrode B is connected to tap A, and the total number of turns of the corresponding coil 108 is 400 turns; electrode C is connected to tap B, and the total number of turns of the corresponding coil 108 is 300 turns.

[0057] This design ensures that when the liquid level rises, the electrodes immersed in a higher position, the total number of turns of the coil 108 in the circuit also increases accordingly, generating a stronger magnetic field and greater repulsive force. This proportional relationship enables the system to automatically adjust the magnetic field strength and repulsive force size according to the degree of inclination of the float plate, achieving precise suppression of disturbances.

[0058] In an embodiment, the multi-stage liquid level detection electrode 106 assembly includes (N+1) liquid level detection electrodes 106 arranged at different height positions. This design ensures that the number of liquid level detection electrodes 106 matches the number of coil 108 taps, with each liquid level detection electrode 106 having a corresponding connection point to form a complete control loop. When the liquid level changes due to the inclination of the float plate, the electrodes at different heights will be in contact or out of contact with the liquid in turn, changing the number of turns of the coil 108 in the circuit, thereby adjusting the magnetic field strength and repulsive force size. This one-to-one correspondence design simplifies the system structure, improves control accuracy, and enables the system to generate a corresponding counter-torque according to the different degrees of inclination of the float plate, achieving precise suppression of disturbances.

[0059] In an embodiment, the core 109 is made of high magnetic permeability steel with a diameter of 1 / 8-3 / 5 of the width of the stabilizing device and a length of 1 / 10-1 / 6 of the diameter of the float plate. The inductor coil 108 is wound around the core 109 with 50-150 turns, not limited to 1 layer, and fixed with adhesive material.

[0060] In this embodiment, the multi-stage liquid level detection electrode 106 assembly includes a set of liquid level detection electrodes 106 at different heights. From the end of the slide rail 0212 to the fixed electrode 103, the height positions of the liquid level detection electrodes 106 increase in turn, specifically, the height positions increase from 1 / 12-1 / 10 of the diameter of the glass tube to 2 / 5-1 / 2. At the same time, by controlling the position of the coil 108 in the corresponding electromagnet through the control wire 105, the liquid level detection electrode 106 closer to the fixed electrode 103 is connected to the coil 108 in the electromagnet through the control wire 105. Specifically, the first end of the coil 108 is connected to the positive electrode of the power supply 101, and the second end serves as the terminal of the coil 108. Between the first end and the second end, every 100 turns is connected to a tap, a total of N=2 taps are connected, labeled as tap A and tap B.

[0061] The fixed electrode 103 in the disturbance triggering unit 102 is inserted into the liquid conductive medium 104 at one end, and connected to the negative electrode of the power supply 101 through the wire at the other end.

[0062] The multi-stage liquid level detection electrode 106 assembly includes three liquid level detection electrodes 106 arranged at different height positions, marked as electrode A, electrode B and electrode C respectively. The height positions of these liquid level detection electrodes 106 are different, so that their top ends are located at different height positions. For example, the height of the top end of electrode A from the bottom of the container is 3 mm, and the heights of the ground sections of electrode 2 and electrode 3 from the bottom of the container are 2 mm and 1 mm respectively.

[0063] The electrode A (the liquid level detection electrode 106 with the highest height position) is connected to the second end of the coil 108; the electrode B is connected to the tap A; and the electrode C is connected to the tap B. In this way, the power supply 101, the fixed electrode 103, the liquid level detection electrode 106 and the coil 108 are sequentially and orderly connected to form a loop.

[0064] When the floating plate is in a horizontal state, the liquid surface of the liquid conductive medium 104 also remains horizontal, and only the electrode B and the electrode C may be immersed in the liquid. At this time, the current flows out from the power supply 101, passes through the fixed electrode 103, the liquid conductive medium 104, the electrode B, the tap B and the second end of the coil 108 to form a loop. The magnetic field generated by the current passing through the coil 108 exerts a repulsive force on the permanent magnetic slider.

[0065] When the floating plate is tilted and one end of the container is relatively sunken, the liquid surface at this end rises, and more electrodes (such as the electrode B and the electrode C) may be immersed in the liquid. At this time, the current can flow into the coil 108 through these newly immersed electrodes. Since these taps are closer to the first end of the coil 108, the total number of turns of the coil 108 connected in the loop decreases, resulting in a decrease in the magnetic field strength and the repulsive force on the permanent magnetic slider.

[0066] On the contrary, when the other end of the container is relatively raised, the corresponding liquid surface at this end decreases, and only the electrode A1 may be immersed in the liquid. At this time, the current can only flow into the coil 108 through the electrode A and the tap A, and the total number of turns of the coil 108 connected in the loop increases, resulting in an increase in the magnetic field strength and the repulsive force on the permanent magnetic slider.

[0067] Through this design, when one end of the sliding rail 0212 is relatively sunken, the total number of turns of the coil 108 connected in the loop by the magnetic triggering mechanism at this end is greater than the total number of turns of the coil 108 connected in the loop when the other end is relatively raised, thereby generating different magnetic field strengths and repulsive forces to drive the permanent magnetic slider to move and offset the disturbance of the floating plate.

[0068] The power supply 101 in this embodiment is a thermoelectric element, which can output stable voltage due to large and stable temperature gradient between the upper and lower walls. The thermoelectric element generates electricity by utilizing the temperature gradient inside the molten salt single tank. The thermoelectric element works based on the Seebeck effect, which generates an electromotive force when the junction of two different conductors or semiconductors is at different temperatures. The hot end of the thermoelectric element is in contact with the bottom of the float plate and is exposed to the high-temperature molten salt environment, with a temperature of up to 500°C. The cold end is in contact with the upper part of the float plate and has a relatively low temperature of about 300°C. Under this 200°C temperature difference, the voltage and current generated by the thermoelectric element are sufficient to drive the magnetic trigger mechanism to work.

[0069] The output end of the thermoelectric element is connected to the coil 108 and the fixed electrode 103 of the magnetic trigger mechanism through a wire, providing power for the entire system. This design utilizes the inherent temperature gradient inside the molten salt single tank, eliminating the need for an external power supply 101, allowing the system to work autonomously and improving its independence and reliability.

[0070] At the same time, the output power of the thermoelectric element changes with the temperature difference, which can also serve as an adaptive mechanism for the system. When the molten salt temperature rises and the temperature difference increases, the output power of the thermoelectric element increases, and the response capability of the system also increases accordingly, enabling it to cope with stronger disturbances. When the molten salt temperature decreases and the temperature difference decreases, the response capability of the system also decreases accordingly, but at this time the disturbance is usually weaker, and the system can still maintain stability.

[0071] To avoid mutual influence between the two stabilizing devices, the outer surface of the float plate body in this embodiment is wrapped with a layer of ferromagnetic material to shield the magnetic field.

[0072] Specifically, a layer of ferromagnetic material with a thickness of 5mm can be wrapped on the outer surface of the float plate body. This layer of ferromagnetic material is made of high-temperature alloy steel, which has good high-temperature resistance and magnetic permeability and can work stably in the molten salt environment for a long time.

[0073] The ferromagnetic material layer has two main functions: on the one hand, it can shield the internal magnetic field of the float plate from affecting the external environment and prevent the internal magnetic field from interfering with other equipment in the molten salt single tank; on the other hand, it can enhance the strength and uniformity of the internal magnetic field of the float plate, improving the working efficiency of the magnetic trigger mechanism.

[0074] In addition, the ferromagnetic material layer also has good corrosion resistance, which can protect the float plate body from corrosion by molten salt and prolong the service life of the float plate. The surface of the ferromagnetic material layer is also specially treated to have a low friction coefficient, reducing the contact resistance between the float plate and the molten salt and improving the flexibility and response speed of the float plate.

[0075] The embodiment also provides a single-tank molten salt energy storage system, which comprises a molten salt single tank, and the top of the molten salt single tank is provided with the above-mentioned disturbance self-adaptive stable floating plate 02. The diameter of the floating plate is slightly smaller than the inner diameter of the molten salt single tank, and a proper gap is left so that the floating plate can float up and down with the molten salt liquid level. The main function of the floating plate is to isolate the molten salt from the air or inert gas above, reduce heat loss, and prevent the molten salt from oxidizing at the same time.

[0076] The external surplus energy is received by the energy input device 03 (molten salt electric heater), the cold salt in the cold salt area 012 in the storage tank 01 is pumped to the energy input device 03 by the heat storage pump 05 to heat the molten salt, and finally enters the hot salt area 011 in the molten salt single tank, and the disturbance self-adaptive stable floating plate 02 moves down to the bottom of the storage tank to complete heat storage; similarly, the process of energy release uses the heat release pump 06 to pump the hot salt in the hot salt area 011 to the energy output device 04 (molten salt air heat exchanger) to release heat, and the cold salt after heat release returns to the cold salt area 012, and the disturbance self-adaptive stable floating plate 02 moves up to the top of the storage tank to complete heat release.

[0077] When the molten salt single tank is disturbed externally, such as earthquake, wind load or equipment vibration, the molten salt liquid level will fluctuate, and then the floating plate will be disturbed. At this time, the disturbance self-adaptive stabilizing system in the floating plate can automatically sense the disturbance, and by adjusting the internal mass distribution, a torque that offsets the disturbance is generated, so that the floating plate remains stable.

[0078] This design not only improves the operation stability of the molten salt single tank, reduces the fluctuation and splashing of the molten salt, but also reduces the oxidation rate and heat loss of the molten salt, improves the efficiency and safety of the whole energy storage system. At the same time, since the floating plate adopts self-adaptive stabilizing design, there is no need for external control system, which greatly simplifies the system structure, improves the reliability and reduces the maintenance cost.

[0079] Specifically, when the disturbance of the disturbance self-adaptive stable floating plate 02 during operation causes the floating plate to tilt, the liquid level detection electrode away from the fixed electrode is disconnected from the liquid separation circuit, the number of induction coils connected by the electromagnet increases on the relatively sinking side, the repulsive force F1 of the first trigger device to the sliding block increases, and on the relatively floating side, the liquid conductive medium gathers away from the fixed electrode in the glass tube, and the second trigger device disappears. The repulsive force F2 of the sliding block to the sliding block disappears, the sliding block moves upward, gives the disturbance self-adaptive stable floating plate 02 a downward pressure, and balances the disturbance.

[0080] In addition, it should be noted that even if the liquid level produces inertial non-stable fluctuation when the floating plate shakes, the mechanism for effectively suppressing the disturbance is as follows: 1. Physical properties of liquid conductive medium suppress fluctuation High density and high viscosity design: the liquid conductive medium (such as mercury or high concentration salt solution) in the application has the characteristics of high density and high viscosity. The high density medium has large inertia and is not easily affected by instantaneous acceleration; high viscosity significantly inhibits internal turbulence and splashing of the liquid.

[0081] Container geometry constraint: the medium is contained in a narrow and long glass tube with a diameter of only 1 / 8~1 / 5 of the width of the float plate Figure 3 The surface tension effect and capillary action of the tube wall on the liquid can significantly weaken the inertial fluctuation amplitude.

[0082] 2. Threshold response mechanism of multi-stage electrodes Step height difference design: the liquid level detection electrodes are strictly arranged according to the height difference (such as 1mm, 2mm, 3mm), and the liquid surface needs to be continuously tilted to a certain threshold value to contact the electricity. Inertial fluctuation is usually a small amplitude oscillation in an instant, which is difficult to reach the height of triggering higher electrodes.

[0083] The specific embodiments of the application are described above. It should be understood that the application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the application. In the case of no conflict, the embodiments of the application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A perturbation adaptive stabilizing float for a molten salt single pot, characterized by, The floating plate body comprises a cavity, two stabilizing devices arranged vertically in the cavity, and a linkage mechanism for dynamically suppressing the disturbance of the floating plate in a two-dimensional plane. The stabilizing device comprises a slide rail arranged in the cavity, a sliding block arranged on the slide rail, and a triggering mechanism for controlling the sliding block to slide on the slide rail to suppress the disturbance of the floating plate.

2. A perturbed adaptive stabilizing float for a molten salt single tank according to claim 1, wherein, The sliding block is a permanent magnetic sliding block, and the triggering mechanism is a magnetic triggering mechanism for generating a magnetic field with a repulsive force varying with the permanent magnetic sliding block.

3. The perturbed self-adapting stabilizing float for a molten salt single pot of claim 2, wherein, The two ends of the slide rail in the sliding direction are respectively provided with one magnetic triggering mechanism. The repulsive forces generated by the two magnetic triggering mechanisms on the permanent magnetic sliding block are respectively F1 and F2. The floating plate is in a static state or a disturbed state; when the floating plate is in the static state, F1=F2; when the floating plate is in the disturbed state, the repulsive force generated by the magnetic triggering mechanism on the permanent magnetic sliding block on the side of the slide rail relative to the sinking side is greater than the repulsive force generated by the magnetic triggering mechanism on the permanent magnetic sliding block on the side of the slide rail relative to the rising side.

4. The perturbed self-adapting stabilizing float plate for a molten salt single tank of claim 3, wherein, The magnetic triggering mechanism comprises: A disturbance triggering unit, which comprises a container containing a liquid conductive medium, and the conductive liquid generates a position feedback signal in response to the liquid level deviation caused by the inclination of the floating plate body; A damping generation unit, which comprises a dynamic magnetic source arranged in the cavity, generates a magnetic field varying based on the position signal, and generates a driving magnetic field on the permanent magnetic sliding block to drive the permanent magnetic sliding block to slide towards the side of the slide rail relative to the rising side.

5. The perturbed self-adapting stabilizing float plate for a molten salt single tank of claim 4, wherein, The dynamic magnetic source comprises an iron core and a coil wound on the iron core, the coil has a first end and a second end, and N taps are led out between the first end and the second end, N is an integer greater than 0; wherein the first end is connected to a power supply; The disturbance triggering unit comprises: A fixed electrode, one end of which is inserted into the liquid conductive medium, and the other end is connected to the power supply; A multi-stage liquid level detection electrode assembly, which comprises at least two liquid level detection electrodes arranged at different height positions; among the at least two liquid level detection electrodes arranged at different height positions, the liquid level detection electrode with the highest height position is connected to the second end, and each remaining liquid level detection electrode is connected to a different coil tap; Wherein, the power supply, the fixed electrode, the liquid level detection electrode, and the coil are sequentially connected in series to form a loop; the total number of turns of the coil connected in the loop when the slide rail is relatively sinking is greater than the total number of turns of the coil connected in the loop when the slide rail is relatively rising.

6. The perturbed self-adapting stabilizing float for a molten salt single pot of claim 5, wherein, The at least two liquid level detection electrodes are sequentially arranged in a direction from high to low in height position, and the arrangement direction is consistent with the sliding direction of the slide rail; the height position of the liquid level detection electrode connected in the loop is proportional to the total number of turns of the coil connected in the corresponding loop.

7. The perturbed self-adapting stabilizing float plate for a molten salt single tank of claim 5, wherein, The multi-stage liquid level detection electrode assembly comprises (N+1) liquid level detection electrodes arranged at different height positions.

8. The perturbed self-adapting stabilizing float plate for a molten salt single tank of claim 5, wherein, The power supply is a thermoelectric element.

9. The perturbed self-adapting stabilizing float plate for a molten salt single tank of claim 2, wherein, The floating plate body is wrapped with a ferromagnetic material.

10. A single tank molten salt energy storage system characterized by, The molten salt single tank comprises a disturbance self-adaptive stabilizing floating plate according to any one of claims 1-9.

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