Liquid level control method

Abstract

The invention discloses a liquid level control method, belongs to the technical field of liquid metal alloy reactors, and mainly aims to accurately and stably control the liquid level of liquid metal in a tank container and ensure safe and efficient operation of a liquid metal alloy cooling reactor. The liquid level control method is applied to the tank type container and comprises the steps that liquid metal is injected into the tank type container from a liquid inlet; the liquid level of the liquid metal is controlled to rise at a first constant speed; under the condition that the probe of the third contact meter is submerged by the liquid metal, the liquid level rising speed of the liquid metal is controlled to be reduced to a second speed; under the condition that the probe of the first contact meter is submerged by the liquid metal, the liquid inlet is controlled to be closed; detecting the state of the first contact meter, and adjusting the liquid level of the liquid metal based on the detection result. Wherein a liquid inlet is formed in the bottom of the tank type container, a probe of the first contact meter is arranged on a target liquid level, a probe of the second contact meter is arranged above the target liquid level, and a probe of the third contact meter is arranged below the target liquid level.

Description

Technical Field

[0001] This application belongs to the technical field of liquid metal alloy reactors, and particularly relates to a liquid level control method. Background Art

[0002] With the development of the times and the progress of technology, the nuclear energy field is moving towards a more efficient and safer direction. As one of the important development directions of the fourth-generation reactors, the liquid metal alloy cooled reactor has become the focus of international nuclear energy research and development. Compared with traditional water-cooled reactors, the liquid metal alloy cooled reactor has significant advantages. Its high boiling point characteristic enables the coolant to maintain a stable liquid state in a high-temperature environment, avoiding a series of problems that may be caused by coolant boiling in water-cooled reactors; its good thermal conductivity can achieve efficient heat transfer, helping to improve the thermal efficiency of the entire reactor system; its excellent neutron economy can ensure the effective utilization of neutrons during the nuclear reaction process, promoting a more sufficient and stable nuclear reaction; and, the liquid metal alloy cooled reactor can operate at low pressure, which greatly reduces the pressure-bearing requirements of the reactor on the system and effectively reduces potential safety hazards.

[0003] Currently, the loop coolant of the liquid metal alloy cooled reactor uses liquid metal. During the operation of this type of reactor, the liquid level control of the liquid metal becomes a key link, which directly affects the normal operation and safety of the reactor. However, the accurate control of the liquid metal level is a very challenging problem, especially in a commonly used storage and reaction environment such as a tank container. Due to the special physical and chemical properties of liquid metal itself, such as its density, viscosity, corrosiveness, etc., traditional liquid level control methods are often inapplicable. Existing liquid level control technologies have defects such as low accuracy and poor reliability in a liquid metal environment, and are prone to causing the liquid level to be too high or too low. Summary of the Invention

[0004] In view of this, this application provides a liquid level control method, and the main purpose is to accurately and stably control the liquid level of liquid metal in a tank container to ensure the safe and efficient operation of the liquid metal alloy cooled reactor.

[0005] To achieve the above object, this application mainly provides the following technical solutions:

[0006] This application provides a liquid level control method, which is applied to a tank container. An inlet is provided at the bottom of the tank container, and a plurality of contact meters are inserted into the interior of the tank container. The plurality of contact meters include a first contact meter, a second contact meter, and a third contact meter. The probe of the first contact meter is arranged at the target liquid level, the probe of the second contact meter is arranged above the target liquid level, and the probe of the third contact meter is arranged below the target liquid level; the method includes:

[0007] Inject liquid metal into the interior of the tank container from the liquid inlet;

[0008] Control the liquid level of the liquid metal to rise uniformly at a first rate;

[0009] When the probe of the third contact meter is submerged by the liquid metal, control the rising rate of the liquid level of the liquid metal to decrease to a second rate;

[0010] When the probe of the first contact meter is submerged by the liquid metal, control the liquid inlet to close;

[0011] Detect the state of the second contact meter and adjust the liquid level of the liquid metal based on the detection result.

[0012] Optionally, the height difference between the probe of the first contact meter and the probe of the second contact meter does not exceed 1 mm.

[0013] Optionally, the first rate is 4 mm / s to 6 mm / s.

[0014] Optionally, the second rate is 0.4 mm / s to 0.6 mm / s.

[0015] Optionally, at least three third contact meters are provided, the probes of at least three third contact meters are at different heights, and the height difference between the probes of two adjacent third contact meters is greater than the height difference between the probe of the first contact meter and the probe of the second contact meter.

[0016] Optionally, during the process of controlling the rising rate of the liquid level of the liquid metal to decrease to the second rate, the rising rate of the liquid level of the liquid metal is decreased in a gradient form.

[0017] Optionally, the plurality of contact meters further include a fourth contact meter, and the probe of the fourth contact meter is arranged between the probe of the first contact meter and the probe of the third contact meter; before controlling the liquid inlet to close when the probe of the first contact meter is submerged by the liquid metal, the method further includes:

[0018] When the probe of the fourth contact meter is submerged by the liquid metal, continuously maintain a state where injecting the liquid metal into the interior of the tank container can be stopped.

[0019] Optionally, the plurality of contact meters further include a fifth contact meter, and the probe of the fifth contact meter is arranged below the probe of the third contact meter, and the fifth contact meter is used to sense the liquid metal.

[0020] Optionally, a quick shut-off valve is provided at the liquid inlet.

[0021] Optionally, an exhaust port is provided at the upper part of the pot-type container, and the exhaust port is used to open when injecting the liquid metal into the interior of the pot-type container.

[0022] By means of the above technical solution, the present application has at least the following beneficial effects:

[0023] In the liquid level control method provided in the embodiments of the present application, a phased rate control strategy is adopted during the injection of the liquid metal into the pot-type container. Initially, the liquid level of the liquid metal rises uniformly at a first rate. As the liquid injection continues, when the liquid metal approaches the target liquid level, the rising rate of the liquid level is adjusted to a second rate. The second rate is less than the first rate, thereby enabling a more precise control of the liquid level rising process and ensuring that the liquid level can reach the target value more accurately. In addition, three contact gauges, namely a first contact gauge, a second contact gauge, and a third contact gauge, are provided at different liquid level positions inside the pot-type container, forming a comprehensive and accurate liquid level sensing system. The probe of the first contact gauge is located at the target liquid level, and its main function is to accurately determine the arrival time of the target liquid level. When the liquid metal submerges the probe of the first contact gauge, the system immediately controls the liquid inlet to close, thereby realizing the precise control of the target liquid level and ensuring that the liquid level is accurately maintained at the expected level. The probe of the second contact gauge is provided above the target liquid level and is used as the monitoring of the liquid level upper limit to detect in real time whether the liquid level rises abnormally, so as to timely discover and handle possible liquid level out-of-control problems. The probe of the third contact gauge is located below the target liquid level, and its function is to provide a trigger signal for the rate adjustment when approaching the target liquid level, ensuring that the conversion from the first rate to the second rate is started at an appropriate time. In practical applications, the multiple monitoring mechanisms constituted by the above three contact gauges cooperate with each other and work together to monitor and control the liquid metal liquid level from multiple key liquid level nodes, greatly improving the accuracy of liquid level control and providing a reliable guarantee for the stable operation of the entire system. Description of the Drawings

[0024] Figure 1 is a flowchart of the liquid level control method of an optional embodiment of the present application;

[0025] Figure 2 is a schematic structural diagram of a pot-type container of an optional embodiment of the present application.

[0026] The reference numerals are shown as:

[0027] 1. Pot-type container; 11. Liquid inlet; 12. Exhaust port; 2. First contact gauge; 3. Second contact gauge; 4. Third contact gauge; 5. Fourth contact gauge; 6. Fifth contact gauge; 7. Target liquid level. Detailed Embodiments

[0028] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0030] In the present application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0032] See Figure 1 and Figure 2 As shown, according to an embodiment of the present application, a liquid level control method is provided, which is applied to a tank container 1. A liquid inlet 11 is provided at the bottom of the tank container 1. A plurality of contact gauges are inserted into the interior of the tank container 1. The plurality of contact gauges include a first contact gauge 2, a second contact gauge 3, and a third contact gauge 4. The probe of the first contact gauge 2 is disposed at the target liquid level 7, the probe of the second contact gauge 3 is disposed above the target liquid level 7, and the probe of the third contact gauge 4 is disposed below the target liquid level 7.

[0033] Among them, the structural form of the pot - type container 1 can be a combination of a cylindrical barrel and a spherical lower head. The cylindrical barrel part is the side support structure of the main accommodation space. It has a regular cylindrical shape and can provide stable radial restraint for the internal liquid metal. The spherical lower head is located at the bottom of the barrel. Its spherical design can effectively disperse pressure and bear the gravity load exerted by the liquid metal. While ensuring the structural strength, it helps to reduce the stress concentration phenomenon. This structural form provides a strong structural basis for the safety and stability of the entire pot - type container 1 during the storage and processing of liquid metal, and is conducive to the smooth progress of related operations such as the flow of liquid metal in the container and liquid - level control.

[0034] Specifically, the liquid inlet 11 is arranged on the spherical lower head, enabling the liquid metal to enter the pot - type container 1 from the bottom. This allows the liquid metal to naturally stack upward under the action of its own gravity, helping to reduce the violent disturbance when the liquid metal enters, so that the liquid metal can rise relatively smoothly in the pot - type container 1.

[0035] Among them, multiple contact gauges are vertically inserted from the top of the pot - type container 1, which is beneficial to maintaining the integrity of the structure of the pot - type container 1 and avoiding the potential reduction in strength and leakage risks caused by opening holes in the side wall or bottom of the pot - type container 1 to insert contact gauges. In addition, since the contact gauges enter from the top, during the installation and maintenance process, the staff can more conveniently operate the contact gauges from above, reducing the interference with the internal liquid metal and other internal structures of the pot - type container 1.

[0036] Specifically, a sealing flange is provided at the top of the pot - type container 1. The sealing flange provides an ideal interface for the installation of the contact gauges. In practical applications, the contact gauges can be inserted into the interior of the pot - type container 1 through appropriate channels reserved on the sealing flange. At the same time, the sealing flange can ensure a reliable sealed connection between these channels and the contact gauges. This sealing performance effectively prevents the leakage of the liquid metal in the tank at the connection between the contact gauges and the top of the container, avoiding a series of safety accidents and environmental pollution caused by the leakage of liquid metal.

[0037] Among them, the multiple contact gauges include a first contact gauge 2, a second contact gauge 3, and a third contact gauge 4. The probe of the first contact gauge 2 is precisely set at the target liquid level 7. The target liquid level 7 is the specific height that the user expects the liquid metal to reach and maintain in the pot - type container 1. When the liquid surface of the liquid metal rises to this height and contacts the probe of the first contact gauge 2, it means that the liquid metal has reached the expected liquid level. The first contact gauge 2 will generate a corresponding signal, and this signal can be used as a key basis for controlling the stop of liquid - metal injection.

[0038] Among them, the probe of the second contact gauge 3 is located above the target liquid level 7. The main function of the second contact gauge 3 is to serve as a redundant or auxiliary monitoring means. In some cases, such as when the liquid level may briefly exceed the target liquid level 7 due to the fluctuation of liquid metal, abnormal injection conditions, etc., the second contact gauge 3 can detect this abnormal situation and cooperate with other control logics to trigger corresponding alarms or corrective measures to prevent problems such as excessive liquid metal and ensure the safety of the system.

[0039] Among them, the probe of the third contact gauge 4 is located below the target liquid level 7. During the liquid level control process, when the liquid metal submerges the probe of the third contact gauge 4, this indicates that the liquid level is rising and approaching the target liquid level 7. At this time, the control mechanism can be triggered to adjust the rising rate of the liquid metal surface so as to more finely control the rising process of the liquid level and avoid the liquid level quickly exceeding the target liquid level 7 due to too fast liquid injection. In this way, the liquid level can reach the target value more smoothly and accurately when approaching the target liquid level 7.

[0040] The liquid level control method includes:

[0041] Step S101: Inject liquid metal into the tank container 1 from the liquid inlet 11.

[0042] Here, step S101 is the starting action of the entire liquid level control process. Its purpose is to fill the tank container 1 with liquid metal to create conditions for subsequent precise liquid level control. By injecting liquid metal into the tank container 1, the amount of liquid metal in the container gradually increases until it reaches the target liquid level 7. This process is the basis of subsequent liquid level control and directly affects the operation effect of the entire system.

[0043] Step S201: Control the liquid metal surface to rise at a first rate uniformly.

[0044] Here, step S201 is to achieve a stable and regular rise of the liquid surface in the initial stage of injecting liquid metal into the tank container 1. By setting and maintaining a uniform rise at the first rate, the liquid level can gradually approach the target liquid level 7 in a relatively stable change process, laying a good foundation for subsequent more precise liquid level control. This helps to avoid an increase in the difficulty of liquid level control or errors caused by too fast or too slow and unstable liquid surface rising speed.

[0045] Step S301: In the case where the liquid metal submerges the probe of the third contact gauge 4, control the rising rate of the liquid metal surface to decrease to a second rate.

[0046] Here, reducing the liquid level rising rate of the liquid metal from the first rate to the second rate mainly aims to achieve more precise liquid level control. When the liquid level approaches the target liquid level 7, reducing the rising rate can make the liquid level rising process smoother and avoid the liquid level exceeding the target liquid level 7 due to too fast a speed.

[0047] Among them, when the liquid level of the liquid metal rises to submerge the probe of the third contact meter 4, it means that the liquid level has risen to a stage close to the target liquid level 7. At this time, by reducing the rising rate, it provides guarantee for the subsequent accurate reaching of the target liquid level 7 by the liquid metal and the stable liquid level maintenance after reaching the target liquid level 7, ensuring that the liquid level of the liquid metal can stabilize near the target liquid level 7, thus meeting the high-precision requirements of the system for liquid level control.

[0048] Specifically, the second rate is less than the first rate. The smaller rising rate allows the system more time to respond to the change of the liquid level and can more sensitively adjust according to the feedback of the first contact meter 2 when the liquid level approaches the target liquid level 7. In this embodiment, step S301 is an important link in the whole liquid level control process and can be used as a turning point from the relatively fast initial liquid injection stage to the precise liquid level control stage.

[0049] Step S401: When the probe of the first contact meter 2 is submerged by the liquid metal, control the liquid inlet 11 to close.

[0050] Here, when the liquid level of the liquid metal rises to submerge the probe of the first contact meter 2, it is used to indicate that the liquid metal has reached the expected target liquid level 7. At this time, controlling the liquid inlet 11 to close is to stop the continuous injection of the liquid metal into the tank container 1.

[0051] It can be understood that step S401 is one of the core operations to achieve precise liquid level control. By timely closing the liquid inlet 11, the liquid level of the liquid metal is accurately maintained at the target liquid level 7, ensuring the accurate control of the amount of liquid metal in the tank container 1.

[0052] Step S501: Detect the state of the second contact meter 3 and adjust the liquid level of the liquid metal based on the detection result.

[0053] Here, the state of the second contact gauge 3 includes a conducting state and a non-conducting state. When the second contact gauge 3 is in the conducting state, it indicates that the liquid metal level has risen to the position of the second contact gauge 3 or higher, meaning that the liquid level has an abnormal situation exceeding the target liquid level 7. In this case, the liquid inlet 11 can be used as a drainage path to drain some liquid metal. By reasonably controlling the drainage speed and drainage volume, the liquid level is gradually reduced, so as to restore the liquid level to near the target liquid level 7. If the second contact gauge 3 is in the non-conducting state, it indicates that the liquid metal level has not touched the second contact gauge 3, meaning that the liquid level is within a reasonable range at or below the target liquid level 7. In this case, generally, there is no need to adjust the liquid metal level to maintain the stable operation state of the system. However, even in the non-conducting state, it is necessary to continuously monitor the state of the second contact gauge 3 to promptly detect possible small fluctuations in the liquid level or potential change trends, ensuring that the liquid level is always stable within the range meeting the system requirements.

[0054] The liquid level control method provided by the embodiments of the present application adopts a phased rate control strategy during the injection of liquid metal into the tank-type container 1. Initially, the liquid level of the liquid metal rises uniformly at the first rate. As the injection continues, when the liquid metal approaches the target liquid level 7, the rising rate of the liquid level is adjusted to the second rate. The second rate is less than the first rate, thereby enabling a more refined control of the liquid level rising process and ensuring that the liquid level can reach the target value more accurately. In addition, this method sets three contact gauges at different liquid level positions inside the tank-type container 1, namely the first contact gauge 2, the second contact gauge 3, and the third contact gauge 4, forming a comprehensive and accurate liquid level sensing system. The probe of the first contact gauge 2 is located at the target liquid level 7, and its main function is to accurately determine the arrival moment of the target liquid level 7. When the liquid metal submerges the probe of the first contact gauge 2, the system immediately controls the liquid inlet 11 to close, thereby achieving precise control of the target liquid level 7 and ensuring that the liquid level is accurately maintained at the expected level. The probe of the second contact gauge 3 is set above the target liquid level 7 and is used as the monitoring of the liquid level upper limit to detect in real time whether the liquid level has an abnormal increase, so as to promptly discover and handle possible liquid level out-of-control problems. The probe of the third contact gauge 4 is located below the target liquid level 7, and its role is to provide a trigger signal for the rate adjustment when approaching the target liquid level 7, ensuring the start of the conversion from the first rate to the second rate at an appropriate time. In practical applications, the multiple monitoring mechanisms composed of the above three contact gauges cooperate with each other and work together to monitor and control the liquid metal level from multiple key liquid level nodes, greatly improving the accuracy of liquid level control and providing a reliable guarantee for the stable operation of the entire system.

[0055] In some possible embodiments disclosed in the present application, see Figure 2As shown, the height difference between the probes of the first contact gauge 2 and the probes of the second contact gauge 3 does not exceed 1 mm.

[0056] In this embodiment, the first contact gauge 2 is used to determine the accurate arrival of the target liquid level 7, and the second contact gauge 3 is used to monitor the upper limit of the liquid level. When the height difference between their probes does not exceed 1 mm, ultra-precise control of the liquid level can be achieved. In practical applications, even the slightest change in the liquid level can be accurately sensed, and such a tight setting enables the liquid level control accuracy to reach the millimeter level.

[0057] In some possible embodiments disclosed in the present application, the first rate is 4 mm / s to 6 mm / s.

[0058] In this embodiment, when the first rate is set within the range of 4 mm / s to 6 mm / s, during the initial stage of injecting the liquid metal into the tank container 1, relatively efficient liquid injection can be achieved. This speed range can ensure the stable rise of the liquid metal while enabling the liquid level to reach a certain height within a short time.

[0059] Specifically, in this embodiment, the first rate is 5 mm / s.

[0060] In some possible embodiments disclosed in the present application, the second rate is 0.4 mm / s to 0.6 mm / s.

[0061] In this embodiment, when the liquid metal approaches the target liquid level 7, the rising rate is reduced to the second rate of 0.4 mm / s to 0.6 mm / s, which makes the rising process of the liquid level smoother and more precise. At this lower speed, the system can more sensitively adjust the liquid level according to the feedback of the contact gauge to ensure that the liquid metal can accurately reach the target liquid level 7.

[0062] Specifically, in this embodiment, the second rate is 0.5 mm / s

[0063] In some possible embodiments disclosed in the present application, refer to Figure 2 As shown, at least three third contact gauges 4 are provided, and the probes of at least three third contact gauges 4 are located at different heights, and the height difference between the probes of two adjacent third contact gauges 4 is greater than the height difference between the probes of the first contact gauge 2 and the probes of the second contact gauge 3.

[0064] In this embodiment, when at least three third contact gauges 4 are provided, since the probes of the three third contact gauges 4 are located at different heights, the rising process of the liquid metal in the stage of approaching the target liquid level 7 can be more finely sensed. Compared with having only one third contact gauge 4, it can provide richer liquid level information, thereby more accurately controlling the conversion timing of the liquid level rising rate from the first rate to the second rate.

[0065] Among them, taking the probe heights of three third contact gauges 4 as h1, h2, and h3 respectively as an example for illustration. When the liquid level of the liquid metal rises to the height of h1, the first third contact gauge 4 is triggered, and the system can record the state of the liquid level at this time; as the liquid level continues to rise to the heights of h2 and h3, the system can more accurately understand the progress of the liquid level rise according to the triggering conditions of the subsequent two third contact gauges 4.

[0066] Specifically, the height difference between the probes of two adjacent third contact gauges 4 is greater than the height difference between the probes of the first contact gauge 2 and the second contact gauge 3. It can be understood that the larger height difference enables the third contact gauge 4 to cover a wider liquid level range, and can more effectively adapt to the change of the liquid level rising speed during the process of the liquid metal approaching the target liquid level 7 from a lower liquid level.

[0067] In the above embodiment, during the process of controlling the liquid level of the liquid metal to decrease to the second rate, the liquid level rising rate of the liquid metal is decreased in a gradient form.

[0068] In this embodiment, decreasing the liquid level rising rate of the liquid metal in a gradient form can make the liquid level transition from a higher first rate to a lower second rate more smoothly. Compared with suddenly reducing the rate to the second rate, the gradient decrease can avoid large fluctuations of the liquid level due to the sharp change of the rate, thereby ensuring that the liquid level can rise in a stable state when approaching the target liquid level 7.

[0069] Among them, during the liquid level control process, when the liquid metal approaches the target liquid level 7, at least three third contact gauges 4 are closely related to the control method of decreasing the liquid level rising rate of the liquid metal in a gradient form. Specifically, at least three third contact gauges 4 are located at different heights, and there is a certain height difference between the probes of two adjacent third contact gauges 4. During the rising process of the liquid metal liquid level, as the liquid level successively submerges the third contact gauges 4 at different heights, the triggering of the third contact gauges 4 at different heights at this time provides the basis and opportunity for the rate to decrease in a gradient form.

[0070] Specifically, when the liquid level submerges the third contact gauge 4 at the lowest position, the system starts the first gradient of the rate decrease and begins to slightly reduce the liquid level rising rate. As the liquid level continues to rise, when the next higher-position third contact gauge 4 is submerged, the system enters the next gradient of the rate decrease and further reduces the rising rate. It should be noted that the triggering of each third contact gauge 4 corresponds to a new rate gradient adjustment stage. This one-to-one correspondence relationship makes the rate decrease process closely related to the rising height of the liquid level, further improving the accuracy and stability of the liquid level control, and avoiding problems such as liquid level overshoot or fluctuation caused by improper rate adjustment.

[0071] In some possible implementation embodiments disclosed in the present application, refer toFigure 2 As shown, the multiple contact gauges further include a fourth contact gauge 5, and the probe of the fourth contact gauge 5 is disposed between the probes of the first contact gauge 2 and the third contact gauge 4; before the liquid metal submerges the probe of the first contact gauge 2 and before the liquid inlet 11 is controlled to close, the method further includes:

[0072] When the liquid metal submerges the probe of the fourth contact gauge 5, the state of being able to stop injecting the liquid metal into the tank container 1 is continuously maintained.

[0073] In this embodiment, the setting of the fourth contact gauge 5 is equivalent to adding an additional "insurance" between the first contact gauge 2 and the third contact gauge 4. When the liquid metal submerges the probe of the fourth contact gauge 5, the system enters a state where the injection of the liquid metal can be stopped, which provides an additional monitoring point for precisely controlling the liquid level. If the first contact gauge 2 fails and cannot accurately trigger the action of closing the liquid inlet 11, the fourth contact gauge 5 can serve as a backup and prepare in advance to stop the injection operation, thereby preventing the liquid level from rising excessively and enhancing the reliability of the liquid level control. At the same time, during the process of the liquid metal submerging the third contact gauge 4 (close to the target liquid level 7) to submerging the first contact gauge 2 (reaching the target liquid level 7), the fourth contact gauge 5 provides an intermediate transition stage. When the liquid metal submerges the probe of the fourth contact gauge 5, the system continuously maintains the state of being able to stop injecting the liquid metal, which allows the system to operate more cautiously when approaching the target liquid level 7. For example, at this stage, the system can perform more refined fine-tuning on the liquid injection flow rate or further stabilize the liquid level rising rate to ensure that the liquid level can approach the target liquid level 7 more smoothly and make full preparations for finally accurately reaching the target liquid level 7 and closing the liquid inlet 11.

[0074] Specifically, when the liquid metal submerges the probe of the fourth contact gauge 5, the system enters a state of continuously maintaining the ability to stop injecting the liquid metal into the tank container 1, and can more cautiously respond to changes in the liquid level to ensure that the liquid level will not quickly exceed the target liquid level 7 due to minor flow fluctuations or other interference factors.

[0075] In some possible embodiments disclosed in the present application, referring to Figure 2 As shown, the multiple contact gauges further include a fifth contact gauge 6, and the probe of the fifth contact gauge 6 is disposed below the probe of the third contact gauge 4, and the fifth contact gauge 6 is used to sense the liquid metal.

[0076] In this embodiment, the fifth contact meter 6 is located below the probe of the third contact meter 4 and can start sensing when the liquid metal is still at a relatively low liquid level. This is equivalent to setting a "sentry" at the early stage of the rising liquid level to monitor the arrival of the liquid metal in advance. For example, after the liquid metal starts to be injected into the tank container 1, the fifth contact meter 6 can sense the rising of the liquid metal earlier than the third contact meter 4, providing an early signal of the liquid level change for the system.

[0077] Specifically, the probe of the fifth contact meter 6 is arranged below the probe of the third contact meter 4. During the rising process of the liquid metal level, the probe of the fifth contact meter 6 contacts the liquid metal earlier than the probe of the third contact meter 4, providing initial information for subsequent liquid level control. For example, the system can preliminarily judge whether the liquid injection process starts normally and whether the rising speed of the liquid metal is within the expected range according to the triggering time of the fifth contact meter 6.

[0078] In some possible embodiments disclosed in the present application, a quick - closing valve is provided at the liquid inlet 11.

[0079] In this embodiment, the quick - closing valve can be quickly closed. Compared with ordinary valves, the quick - closing valve has a faster closing speed and can stop the injection of liquid metal from the liquid inlet 11 into the tank container 1 within an extremely short time, so as to ensure that the liquid level of the liquid metal can accurately reach the target liquid level 7.

[0080] In some possible embodiments disclosed in the present application, as shown in Figure 2 the upper part of the tank container 1 is provided with an exhaust port 12, and the exhaust port 12 is used to open when injecting liquid metal into the tank container 1.

[0081] In this embodiment, when injecting liquid metal into the tank container 1, the inflow of the liquid metal will occupy the space inside the container, causing the air to be compressed. If there is no exhaust port 12, the pressure inside the container will gradually increase. The opening of the exhaust port 12 allows the compressed air to be discharged, keeping the pressure inside the container within a reasonable range all the time, avoiding damage to the container structure caused by excessive pressure, and at the same time reducing the risk of safety accidents such as the container bursting or leaking.

[0082] Specifically, the exhaust port 12 is located in the upper part of the tank container 1. During the liquid metal injection process, the liquid metal enters from the liquid inlet 11 at the bottom and gradually fills the container space upward. Since the density of air is less than that of the liquid metal, the air will naturally gather in the upper part of the tank container 1. Setting the exhaust port 12 in the upper part of the tank container 1 can conveniently discharge the gathered air.

[0083] Here, as the specification drawings Figure 1As shown, for the specific implementation of the liquid level control method, the embodiments of the present application provide a liquid level control system, which is used to accurately and stably control the liquid level of the liquid metal in the tank container 1.

[0084] Among them, the liquid level control system includes a contact meter network and a control device. The contact meter network can accurately convert the liquid level information transmitted by multiple contact meters into electrical signals or other recognizable signals, and transmit them to the control device. The control device can receive the electrical signals or other forms of recognizable signals transmitted from the contact meter network, judge the position of the liquid level in the tank container 1, and finally generate corresponding control strategies. It should be noted that the control strategy will be converted into specific instructions and sent to the corresponding actuators through the output port of the control device, such as the quick closing valve of the liquid inlet 11.

[0085] Specifically, the control device includes a signal processing and analysis module and a control strategy formulation and execution module. The signal processing and analysis module collects signals from the contact meter network by using an adaptation circuit and a sensor. When collecting, it checks the signal integrity, sets thresholds and verification mechanisms to find problems. It preprocesses the collected signals by filtering and amplifying, and then determines the liquid level and analyzes its change trend based on feature extraction using data analysis algorithms. The control strategy formulation and execution module formulates strategies according to the liquid level information, change trend and system status (such as the flow rate of the liquid inlet 11), such as adjusting the liquid injection strategy according to the gap and change speed between the liquid level and the target liquid level 7. It generates accurate instructions for actuators such as the quick closing valve of the liquid inlet 11 and the liquid injection pump, and monitors the execution situation in real time after the instructions are issued. In case of anomalies, it activates the emergency mechanism and records relevant information.

[0086] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous methods can be freely combined and superimposed.

[0087] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in the technical field of the present application, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A liquid level control method, characterized in that, Applied to a pot - type container (1), an inlet (11) is provided at the bottom of the pot - type container (1). A plurality of contact gauges are inserted into the interior of the pot - type container (1). The plurality of contact gauges include a first contact gauge (2), a second contact gauge (3), and a third contact gauge (4). The probe of the first contact gauge (2) is set at the target liquid level (7), the probe of the second contact gauge (3) is set above the target liquid level (7), and the probe of the third contact gauge (4) is set below the target liquid level (7). The method includes: Inject liquid metal into the interior of the pot - type container (1) from the inlet (11); Control the liquid level of the liquid metal to rise at a first rate uniformly; When the liquid metal submerges the probe of the third contact gauge (4), control the rising rate of the liquid level of the liquid metal to decrease to a second rate; When the liquid metal submerges the probe of the first contact gauge (2), control the inlet (11) to close; Detect the state of the second contact gauge (3) and adjust the liquid level of the liquid metal based on the detection result.

2. The liquid level control method according to claim 1, characterized in that The height difference between the probe of the first contact gauge (2) and the probe of the second contact gauge (3) does not exceed 1 mm.

3. The liquid level control method according to claim 1, characterized in that The first rate is 4 mm / s - 6 mm / s.

4. The liquid level control method according to claim 1, wherein The second rate is 0.4 mm / s - 0.6 mm / s.

5. The liquid level control method according to claim 1, characterized in that, At least three third contact gauges (4) are provided. The probes of at least three third contact gauges (4) are at different heights, and the height difference between the probes of two adjacent third contact gauges (4) is greater than the height difference between the probe of the first contact gauge (2) and the probe of the second contact gauge (3).

6. The liquid level control method according to claim 1, characterized in that, During the process of controlling the rising rate of the liquid level of the liquid metal to decrease to the second rate, the rising rate of the liquid level of the liquid metal is decreased in a gradient form.

7. The liquid level control method according to claim 1, characterized in that The plurality of contact gauges further include a fourth contact gauge (5). The probe of the fourth contact gauge (5) is set between the probe of the first contact gauge (2) and the probe of the third contact gauge (4). Before controlling the inlet (11) to close when the liquid metal submerges the probe of the first contact gauge (2), the method further includes: When the liquid metal submerges the probe of the fourth contact gauge (5), continuously maintain a state where injecting the liquid metal into the interior of the pot - type container (1) can be stopped.

8. The liquid level control method according to claim 1, wherein The plurality of contact gauges further include a fifth contact gauge (6). The probe of the fifth contact gauge (6) is set below the probe of the third contact gauge (4), and the fifth contact gauge (6) is used to sense the liquid metal.

9. The liquid level control method according to claim 1, wherein A quick - closing valve is provided at the inlet (11).

10. The liquid level control method according to claim 1, characterized in that, An exhaust port (12) is provided at the upper part of the pot - type container (1). The exhaust port (12) is used to open when injecting the liquid metal into the interior of the pot - type container (1).

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