A liquid-helium-free magnet switch protection method, system, storage medium and protection device

Abstract

The application relates to a liquid-helium-free magnet switch protection method, system, storage medium and protection device, relates to the field of superconducting magnets, and comprises the following steps: acquiring switch voltage information of a magnet switch; judging whether a voltage value corresponding to the switch voltage information is greater than a preset upper limit voltage value; if the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, controlling each device to maintain the original state; and if the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, controlling a first heater preset in the magnet to heat at a preset first fixed power within a preset fixed time length, wherein the first heater is arranged in close proximity to any preset coil in the magnet. The application has the effect of reducing the occurrence of damage to each hardware when the quench phenomenon occurs on the superconducting switch of the magnet.

Description

Technical Field

[0001] This application relates to the field of superconducting magnet technology, and in particular to a liquid helium-free magnet switch protection method, system, storage medium and protection device. Background Technology

[0002] The coils and switches of a superconducting magnet are made of superconducting wire. When the superconducting wire is in its superconducting state, its resistance is zero, and passing a high current through it will not generate Joule heat. However, when the superconducting wire is in its non-superconducting state, its resistance is not zero. If a high current is applied to the magnet in this state, energy will be released as heat. When any of the parameters—temperature, magnetic field, or current—exceeds a critical value, the superconducting magnet will undergo a phase transition and become a normal conductor; this process is called quenching loss. In emergency situations, the magnet needs to be quenched to lose its magnetism, thereby ensuring the safety of personnel.

[0003] In related technologies, liquid helium-free magnets employ a method where each quench protection heater is mounted on the surface of each superconducting coil. These quench protection heaters are connected in parallel across adjacent superconducting coils. When a group of coils in the liquid helium-free magnet quenches, the induced voltage heats the heater connected in parallel with it, rapidly transmitting the quench phenomenon to the next coil. The next coil then heats its parallel heater, triggering a chain reaction that spreads the quench of one coil to the entire magnet, causing the magnet to quench as a whole. This disperses the energy release across all coils, preventing heat from being concentrated on a single coil and causing it to overheat and burn out. This significantly improves the quench protection effect of liquid helium-free superconducting magnets.

[0004] Regarding the aforementioned technologies, the inventors believe that this method provides significant protection for the magnet superconducting coil. However, when quenching occurs at the magnet superconducting switch, the energy of the entire magnet is released onto the superconducting switch, potentially burning it out. If a protection diode is installed at the magnet superconducting switch for protection, the energy from quenching acting on the diode group can easily cause the protection diode group itself to burn out. Therefore, how to prevent damage to the various hardware components of the magnet when quenching occurs at the magnet superconducting switch is a problem that urgently needs to be solved. Summary of the Invention

[0005] To reduce the occurrence of hardware damage when quenching occurs in a magnet superconducting switch, this application provides a liquid helium-free magnet switch protection method, system, storage medium, and protection device.

[0006] Firstly, this application provides a method for protecting a liquid helium-free magnet switch, employing the following technical solution: A method for protecting a liquid helium-free magnet switch includes: Obtain the switching voltage information of the magnet switch; Determine whether the voltage value corresponding to the switch voltage information is greater than the preset upper limit voltage value; If the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, then control each device to maintain its original state; If the voltage value corresponding to the switching voltage information is greater than the upper limit voltage value, the first heater preset in the magnet is controlled to heat at a preset first fixed power for a preset fixed time period, wherein the first heater is set close to any preset coil in the magnet.

[0007] By adopting the above technical solution, the voltage value at the magnet switch is obtained to monitor whether a quench phenomenon will occur at the magnet switch. When the voltage value is greater than the set upper limit voltage value, it indicates that a quench phenomenon has occurred. At this time, the first heater is controlled to heat up so that the coils in the magnet that are close to the first heater are heated, so that the coils quench first, thereby causing all the interconnected coils in the magnet to quench. This ensures that the energy released by the quench of the magnet switch can be evenly distributed among the coils, thereby reducing the possibility of damage to the magnet hardware when a quench phenomenon occurs at the magnet superconducting switch.

[0008] Optionally, when the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the liquid helium magnet-free switch protection method further includes: Determine whether the voltage value corresponding to the switch voltage information is greater than the preset drop field voltage value; If the voltage value corresponding to the switching voltage information is not greater than the drop field voltage value, then a normal signal is output and each device is controlled to maintain its original state. If the voltage value corresponding to the switch voltage information is greater than the drop field voltage value, the second heater preset around the magnet switch is controlled to heat with a preset second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch, wherein the second fixed power is much smaller than the first fixed power.

[0009] By adopting the above technical solution, when the voltage of the magnet switch does not exceed the upper limit voltage but exceeds the drop field voltage, it indicates that the magnet switch has a tendency to lose overshoot. At this time, the second heater is controlled to heat slowly to make the magnet switch open, so that the current flows through the external load connected in parallel with the magnet switch to realize energy release.

[0010] Optionally, during normal signal output, the protection method for the liquid helium magnet-free switch also includes: Obtain the coil temperature information of the coil inside the magnet; Determine whether the temperature value corresponding to the coil temperature information is greater than the preset critical temperature value; If the temperature value corresponding to the coil temperature information is not greater than the critical temperature value, then control each device to maintain its original state; If the temperature value corresponding to the coil temperature information is greater than the critical temperature value, the second heater around the magnet switch is controlled to heat at a second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

[0011] By adopting the above technical solution, when the temperature of the coil inside the magnet exceeds the critical temperature value, it indicates that the low temperature environment in which the magnet is located is not effective and there is a tendency to lose quench. At this time, the second heater is controlled to heat up to actively reduce the field, realize energy release, and reduce the occurrence of subsequent quench.

[0012] Optionally, during normal signal output, the protection method for the liquid helium magnet-free switch also includes: Obtain the device status information of the preset refrigeration equipment; Determine whether the status corresponding to the equipment status information is consistent with the preset normal operating status; If the status information of the equipment corresponds to the normal operating status, then control each piece of equipment to maintain its original status. If the status information of the equipment is inconsistent with the normal operating status, the second heater around the magnet switch is controlled to heat at a second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

[0013] By adopting the above technical solution, the status of the refrigeration equipment that provides a low-temperature environment for the magnet is monitored. When the status of the refrigeration equipment is abnormal, it indicates that the magnet is at risk of losing quench. At this time, the second heater is controlled to heat up to actively reduce the field, realize energy release, and reduce the occurrence of subsequent quench.

[0014] Optionally, during normal signal output, the protection method for the liquid helium magnet-free switch also includes: Obtain the power supply status information of the power source that supplies power to the refrigeration equipment; Determine whether the power supply status information corresponds to the preset normal power supply status; If the power supply status information corresponds to the normal power supply status, then control each device to maintain its original status. If the power supply status information corresponds to a state inconsistent with the normal power supply status, the second heater around the magnet switch is controlled to heat at a second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

[0015] By adopting the above technical solution, the power supply status of the power supply for the refrigeration equipment is monitored. When an abnormal power supply is detected, it indicates that the refrigeration equipment may not be able to perform a good refrigeration operation on the magnet, indicating that the magnet is at risk of losing quench. At this time, the second heater is controlled to heat up to actively reduce the field, realize energy release, and reduce the occurrence of subsequent quench.

[0016] Optional, also includes: Obtain the switching status information of the external switch connected to the first heater; Determine whether the state corresponding to the switch status information is consistent with the preset compression state; If the state corresponding to the switch status information is inconsistent with the squeezing state, then control each device to maintain its original state; If the state corresponding to the switch state information is consistent with the compression state, then the first heater inside the control magnet will heat with a first fixed power for a fixed duration.

[0017] By adopting the above technical solution, in case of an emergency, staff can press an external switch to de-energize the magnet as a whole, thus ensuring personnel safety.

[0018] Optionally, before judging the switch voltage information, the liquid helium-free magnet switch protection method also includes: Obtain the magnet's state information; Determine whether the state corresponding to the magnet state information is consistent with the preset excitation state; If the state corresponding to the magnet state information is inconsistent with the excitation state, then the switch voltage information is judged. If the state corresponding to the magnet state information is consistent with the excitation state, then no judgment is made on the switching voltage information.

[0019] By adopting the above technical solution, when the magnet is in the energized state, no voltage judgment is made, so as to realize the superconducting switch protection function is turned off, preventing the system from mistakenly thinking that the superconducting switch voltage is abnormal and causing an emergency loss of superconductivity during the magnet energization process, thus improving the stability of the magnet's use.

[0020] Secondly, this application provides a liquid helium-free magnet switch protection system, which adopts the following technical solution: A liquid helium-free magnet switch protection system, comprising: The acquisition module is used to acquire the switching voltage information of the magnet switch; The processing module, connected to the acquisition and judgment modules, is used for information storage and processing; The judgment module is used to determine whether the voltage value corresponding to the switch voltage information is greater than the preset upper limit voltage value; If the judgment module determines that the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the processing module controls each device to maintain its original state. If the judgment module determines that the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, the processing module controls the first heater preset in the magnet to heat at a preset first fixed power for a preset fixed time period, wherein the first heater is set close to any preset coil in the magnet.

[0021] By adopting the above technical solution, the acquisition module first acquires the voltage value at the magnet switch to monitor whether a quench phenomenon will occur at the magnet switch. When the judgment module determines that the voltage value is greater than the set upper limit voltage value, it indicates that a quench phenomenon has occurred. At this time, the processing module controls the first heater to heat up so that the coils in the magnet that are close to the first heater are heated, so that the coils quench first, thereby causing all the interconnected coils in the magnet to quench. This ensures that the energy released by the quench of the magnet switch can be evenly distributed among the coils, thereby reducing the possibility of damage to the magnet hardware when a quench phenomenon occurs at the magnet superconducting switch.

[0022] Thirdly, this application provides a protective device, which adopts the following technical solution: A protection device includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed any of the above-described liquid helium-free magnet switch protection methods.

[0023] By adopting the above technical solution and using the protection device, the voltage value at the magnet switch is obtained to monitor whether a quench phenomenon will occur at the magnet switch. When the voltage value is greater than the set upper limit voltage value, it indicates that a quench phenomenon has occurred. At this time, the first heater is controlled to heat up so that the coils in the magnet that are close to the first heater are heated, so that the coils quench first, thereby causing all the interconnected coils in the magnet to quench. This ensures that the energy released by the quench of the magnet switch can be evenly distributed among the coils, thereby reducing the possibility of damage to the magnet hardware when a quench phenomenon occurs at the magnet superconducting switch.

[0024] Fourthly, this application provides a computer storage medium capable of storing corresponding programs, which has the characteristic of reducing the occurrence of hardware damage when quenching occurs on the magnet superconducting switch, and adopts the following technical solution: A computer-readable storage medium storing a computer program that can be loaded by a processor and executed any of the above-described liquid helium-free magnet switch protection methods.

[0025] By adopting the above technical solution, the computer program of the storage medium for the protection method of liquid helium magnet switch obtains the voltage value at the magnet switch to monitor whether a quench phenomenon will occur at the magnet switch. When the voltage value is greater than the set upper limit voltage value, it indicates that a quench phenomenon has occurred. At this time, the first heater is controlled to heat up so that the coils in the magnet that are close to the first heater are heated, so that the coils quench first, thereby causing all the interconnected coils in the magnet to quench. This ensures that the energy released by the quench of the magnet switch can be evenly distributed among the coils, thereby reducing the possibility of damage to the magnet hardware when a quench phenomenon occurs on the magnet superconducting switch.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Monitor the voltage of the magnet switch so that when the voltage exceeds the set threshold, the coils inside the magnet can be controlled to perform quenching, so that the energy released by the quench can be evenly distributed to each coil, thereby reducing the possibility of damage to the hardware inside the magnet when the quench occurs on the magnet switch. 2. During normal use of the magnet, the coil temperature, the status of the cooling equipment, and the status of the power supply are monitored respectively, so that when an abnormality occurs, field reduction processing can be performed to release energy and reduce the possibility of the magnet losing its quench. 3. It can identify and judge the magnet excitation status so that the quench protection device does not start during the magnet excitation process, thereby improving the stability of the magnet during use. Attached Figure Description

[0027] Figure 1 This is a circuit diagram of liquid helium-free magnet protection technology in related technologies.

[0028] Figure 2 This is a flowchart of a liquid helium-free magnet switch protection method.

[0029] Figure 3 This is a flowchart of the method for determining the field voltage drop.

[0030] Figure 4 This is a flowchart of a method for monitoring the status of various hardware components inside and outside the magnet.

[0031] Figure 5 This is a flowchart of the emergency queuing determination method.

[0032] Figure 6 This is a flowchart of the module for the liquid helium-free magnet switch protection method. Detailed Implementation

[0033] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-6The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

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

[0035] Reference Figure 1 Existing liquid helium-free magnet protection employs a quench protection heater to heat the superconducting coil, thereby achieving quench protection for the entire magnet. Specifically, the magnet contains a magnet switch and several coils, all connected in series. Each coil has a heater and diode group connected in parallel, with the heater and diode group also connected in series. The heater is positioned close to the adjacent coil, and the first and last coils and their heaters are also arranged as adjacent coils. This ensures that when any coil in the magnet experiences a quench, the released energy heats the nearest heater, causing the coil connected in parallel to that heater to also experience a quench. This cycle repeats until all coils in the magnet experience quench protection, thus dispersing the released energy and preventing localized overheating and coil burnout.

[0036] This application discloses a liquid helium-free magnet switch protection method. When the magnet is not in an energized state, the coil temperature, the status of the refrigeration equipment, and the status of the power supply are monitored to enable the magnet to perform field reduction processing to release energy in case of abnormalities. At the same time, the magnet switch voltage can be monitored. When the voltage value is too high, it indicates that the magnet's quenching trend is irreversible. At this time, the quenching of each coil in the magnet is controlled to distribute the energy evenly, so that when the quenching phenomenon occurs on the magnet switch, the hardware in the magnet is not easily damaged.

[0037] Reference Figure 2 The method for protecting a liquid helium-free magnet switch includes the following steps: Step S100: Obtain the magnet state information of the magnet.

[0038] The status information of the magnet corresponds to the current operating status of the magnet, including the status during normal use, the status during demagnetization, and the status during excitation. This information can be obtained by monitoring the status of the magnet. The monitoring equipment is set by the staff according to the actual situation, and will not be elaborated further.

[0039] Step S101: Determine whether the state corresponding to the magnet state information is consistent with the preset excitation state.

[0040] The excitation state refers to the state set by the staff when the magnet is connected to an external excitation power supply for excitation. The connection point between the magnet and the external excitation power supply is on both sides of the magnet switch. The purpose of this judgment is to determine whether the magnet is currently connected to an external power supply, so as to facilitate subsequent judgment.

[0041] Step S1011: If the state corresponding to the magnet state information is inconsistent with the excitation state, then obtain the switching voltage information of the magnet switch and determine whether the voltage value corresponding to the switching voltage information is greater than the preset upper limit voltage value.

[0042] When the state corresponding to the magnet status information is inconsistent with the excitation state, it indicates that the magnet is not connected to the external excitation power supply and is not in the excitation process. The voltage value corresponding to the switch voltage information is the voltage value across the magnet switch, which can be obtained through voltage detection equipment. The upper limit voltage value is the minimum voltage value when the magnet switch can no longer avoid the occurrence of quench phenomenon. The specific value is set by the staff according to the actual situation. The purpose of the judgment is to determine whether quench phenomenon is about to occur at the magnet switch by monitoring the voltage.

[0043] Step S10111: If the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, then control each device to maintain its original state.

[0044] When the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, it means that there is no irreversible quenching trend at the magnet switch. At this time, it is sufficient to control all devices inside and outside the magnet to maintain the current state.

[0045] Step S10112: If the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, then control the first heater preset in the magnet to heat with a preset first fixed power for a preset fixed time period, wherein the first heater is set close to any preset coil in the magnet.

[0046] When the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, it indicates that the magnet switch has an irreversible tendency to quench, and action is required. The first heater is a device installed inside the magnet for heating, and the first heater is placed close to any coil in the magnet so that changes in the temperature of the first heater can cause changes in the coil temperature. The first fixed power is the temperature that can cause an emergency change in the coil temperature, and the fixed duration is the duration for which the first heater operates, set by the operator. Both are set by the operator according to the actual situation. The first heater is activated to cause the nearby coils to heat up urgently, so that the coils can quench first due to temperature changes. Then, based on the correlation between the coils, the magnet as a whole can quench, so that the energy of the quench at the magnet switch can be distributed to each coil of the magnet, thereby reducing the possibility of damage to the magnet hardware caused by quench at the magnet switch.

[0047] Step S1012: If the state corresponding to the magnet state information is consistent with the excitation state, then no judgment is made on the switch voltage information.

[0048] When the state corresponding to the magnet state information is consistent with the excitation state, it indicates that the magnet is in the excitation state. At this time, the switch voltage information is not judged to reduce the system's misjudgment that the magnet is in the quench state, thereby improving the stability of the magnet excitation process.

[0049] Reference Figure 3 When the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the protection method for the liquid helium-free magnet switch also includes: Step S200: Determine whether the voltage value corresponding to the switch voltage information is greater than the preset drop voltage value.

[0050] The drop field voltage value is the minimum voltage set by the staff when a quench situation may occur at the magnet switch. The purpose of the judgment is to determine whether there is a tendency for a quench phenomenon to occur at the magnet switch.

[0051] Step S2001: If the voltage value corresponding to the switching voltage information is not greater than the drop field voltage value, then output a normal signal and control each device to maintain its original state.

[0052] When the voltage value corresponding to the switch voltage information is not greater than the drop field voltage value, it indicates that there is no quenching trend at the magnet switch. A normal signal is output to record the situation and control each device to maintain its original state so that the magnet can be used normally.

[0053] Step S2002: If the voltage value corresponding to the switch voltage information is greater than the drop field voltage value, then control the second heater preset around the magnet switch to heat with a preset second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch, wherein the second fixed power is much smaller than the first fixed power.

[0054] When the voltage value corresponding to the switch voltage information is greater than the field reduction voltage value, it indicates that there is a tendency for the magnet switch to fail, and this situation needs to be dealt with in a timely manner. The second heater is a device installed inside the magnet for heating, and the second heater is placed around the magnet switch to heat the magnet switch. The second fixed power is the operating power that can slowly heat the magnet by the second heater. The external load is a hardware device outside the magnet that can withstand a large amount of energy. The external load is connected in parallel to both sides of the magnet switch. When the second heater slowly heats, the magnet switch will not fail. At this time, the magnet switch can be disconnected by heat so that the current cannot pass through the magnet switch. At this time, the current flows through the external load to release energy, thereby realizing the field reduction treatment of the entire magnet and reducing the occurrence of magnet failure.

[0055] Reference Figure 4 During normal signal output, the protection method for the liquid helium magnet-free switch also includes: Step S300: Obtain the coil temperature information of the coil inside the magnet, the device status information of the preset refrigeration device, and the power supply status information of the power supply that powers the refrigeration device.

[0056] The coil temperature information corresponds to the external temperature of each coil, which can be obtained by installing temperature sensors around the coil; the refrigeration equipment is a device that provides a low-temperature environment for the magnet, which can be a refrigeration machine. The equipment status information corresponds to the current operating status of the refrigeration equipment, including normal and abnormal states, which can be obtained by monitoring the refrigeration equipment; the power supply is the power source that supplies power to the refrigeration equipment, which can consist of a main power supply and a backup power supply. The power supply status information corresponds to the status during the power supply process, which can be obtained by monitoring the power supply.

[0057] Step S301: Determine whether the temperature value corresponding to the coil temperature information is greater than the preset critical temperature value.

[0058] The critical temperature value is the minimum temperature at which the coil exhibits a tendency to lose quench. The purpose of this determination is to ascertain whether the coil exhibits a tendency to lose quench.

[0059] Step S302: Determine whether the status corresponding to the equipment status information is consistent with the preset normal operating status.

[0060] Normal operating state refers to the state set by the staff when the refrigeration equipment is in normal cooling to provide a low-temperature environment for the magnet. The purpose of the judgment is to know whether the refrigeration equipment can continue to provide a low-temperature environment for the magnet, so as to further judge whether the magnet has a tendency to lose quench.

[0061] Step S303: Determine whether the power supply status information corresponds to the preset normal power supply status.

[0062] The normal power supply status refers to the energy provided by the power supply set by the staff to the refrigeration equipment during normal operation. The purpose of this judgment is to determine whether the refrigeration equipment can be used normally, and to further determine whether the magnet has a tendency to lose quench.

[0063] Step S304: If the temperature value corresponding to the coil temperature information is not greater than the critical temperature value, and the status corresponding to the equipment status information is consistent with the normal operation status, and the status corresponding to the power supply status information is consistent with the normal power supply status, then control each device to maintain its original status.

[0064] When the temperature value corresponding to the coil temperature information is not greater than the critical temperature value, and the status corresponding to the equipment status information is consistent with the normal operating status and the status corresponding to the power supply status information is consistent with the normal power supply status, it indicates that the magnet does not have a tendency to lose quench. At this time, it is sufficient to maintain the normal operation of all equipment inside and outside the magnet.

[0065] Step S305: If the temperature value corresponding to the coil temperature information is greater than the critical temperature value and / or the state corresponding to the equipment status information is inconsistent with the normal operating state and / or the state corresponding to the power supply status information is inconsistent with the normal power supply state, then control the second heater around the magnet switch to heat at the second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

[0066] When the temperature value corresponding to the coil temperature information is greater than the critical temperature value and / or the state corresponding to the equipment status information is inconsistent with the normal operating state and / or the state corresponding to the power supply status information is inconsistent with the normal power supply state, it indicates that the magnet has a tendency to lose quench. In order to control the second heater to heat up and realize the magnet switch to be turned off, so that the energy is released at the external load, thereby reducing the phenomenon of magnet losing quench.

[0067] Reference Figure 5 The protection method for liquid helium-free magnet switches also includes: Step S400: Obtain the switching status information of the external switch connected to the first heater.

[0068] The external switch is a switch located outside the magnet that can be triggered by a person. The external switch is connected to the first heater to enable the start and stop control of the first heater. The switch status information corresponds to the current state of the external switch, which includes not being pressed and being pressed.

[0069] Step S401: Determine whether the state corresponding to the switch state information is consistent with the preset compression state.

[0070] The squeezed state refers to the state when the external switch is pressed to start the first heater. The purpose of this judgment is to determine whether external personnel need to start the first heater.

[0071] Step S4011: If the state corresponding to the switch state information is inconsistent with the compression state, then control each device to maintain its original state.

[0072] When the status information corresponding to the switch is inconsistent with the extrusion status, it means that the first heater does not need to be started, that is, there is no need to perform overrun handling. At this time, it is sufficient to control each device to maintain its original state.

[0073] Step S4012: If the state corresponding to the switch state information is consistent with the compression state, then control the first heater inside the magnet to heat with a first fixed power for a fixed duration.

[0074] When the switch status information corresponds to the squeezed state, it indicates that an external person squeezes the external switch to activate the first heater. At this time, the first heater is activated to enable the magnet to quench, so that in case of an accident, the staff can perform emergency quenching on the magnet to ensure personnel safety.

[0075] Reference Figure 6 Based on the same inventive concept, embodiments of the present invention provide a liquid helium-free magnet switch protection system, comprising: The acquisition module is used to acquire the switching voltage information of the magnet switch; The processing module, connected to the acquisition and judgment modules, is used for information storage and processing; The judgment module is used to determine whether the voltage value corresponding to the switch voltage information is greater than the preset upper limit voltage value; If the judgment module determines that the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the processing module controls each device to maintain its original state. If the judgment module determines that the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, the processing module controls the first heater preset in the magnet to heat with a preset first fixed power for a preset fixed time period, wherein the first heater is set close to any preset coil in the magnet. The field reduction determination module determines whether an external load is needed for magnet field reduction processing based on the voltage at the magnet switch. The coil temperature monitoring module is used to monitor the temperature of each coil in the magnet so that when the coil temperature exceeds the critical value, the magnet can be de-fielded to reduce the occurrence of overall magnet failure. The refrigeration equipment monitoring module is used to monitor the operating status of the refrigeration equipment so that when the refrigeration equipment malfunctions, the magnet can be de-fielded to reduce the occurrence of overall magnet quench failure. The power supply monitoring module is used to monitor the power supply status so that when the power supply is abnormal, the magnet can be de-fielded to reduce the occurrence of overall magnet loss of quench. The emergency quench module is used to control the emergency quench of the magnet to ensure personnel safety in the event of an accident. The excitation determination module is used to determine whether the magnet is in an energized state. When it is in an energized state, the voltage of the magnet switch is not judged, so as to improve the stability of magnet excitation.

[0076] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0077] This invention provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as a liquid helium-free magnet switch protection method.

[0078] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0079] Based on the same inventive concept, embodiments of the present invention provide a protection device, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed to protect a liquid helium-free magnet switch.

[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0081] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for protecting a liquid helium-free magnet switch, characterized in that, include: Obtain the switching voltage information of the magnet switch; Determine whether the voltage value corresponding to the switch voltage information is greater than the preset upper limit voltage value; If the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, then control each device to maintain its original state; If the voltage value corresponding to the switching voltage information is greater than the upper limit voltage value, the first heater preset in the magnet is controlled to heat at a preset first fixed power for a preset fixed time period. The first heater is set close to any preset coil in the magnet, and the first fixed power is the power that can cause the coil temperature to change rapidly. When the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the liquid helium magnet switch protection method further includes: determining whether the voltage value corresponding to the switch voltage information is greater than the preset drop field voltage value; if the voltage value corresponding to the switch voltage information is not greater than the drop field voltage value, then outputting a normal signal and controlling each device to maintain its original state; if the voltage value corresponding to the switch voltage information is greater than the drop field voltage value, then controlling the second heater preset around the magnet switch to heat at a preset second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch, wherein the second fixed power is much smaller than the first fixed power, and the second fixed power is the operating power that can be used for the second heater to heat slowly; During normal signal output, the protection method for the liquid helium-free magnet switch also includes: acquiring the coil temperature information of the coil inside the magnet; determining whether the temperature value corresponding to the coil temperature information is greater than a preset critical temperature value; if the temperature value corresponding to the coil temperature information is not greater than the critical temperature value, controlling each device to maintain its original state; if the temperature value corresponding to the coil temperature information is greater than the critical temperature value, controlling the second heater around the magnet switch to heat with a second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch; When a normal signal is output, the protection method for the liquid helium magnet-free switch also includes: acquiring the equipment status information of a preset refrigeration device; Determine whether the status corresponding to the equipment status information is consistent with the preset normal operating status; if the status corresponding to the equipment status information is consistent with the normal operating status, control each device to maintain its original status; if the status corresponding to the equipment status information is inconsistent with the normal operating status, control the second heater around the magnet switch to heat at the second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

2. The liquid helium-free magnet switch protection method according to claim 1, characterized in that... During normal signal output, the protection method for the liquid helium magnet-free switch also includes: Obtain the power supply status information of the power source that supplies power to the refrigeration equipment; Determine whether the power supply status information corresponds to the preset normal power supply status; If the power supply status information corresponds to the normal power supply status, then control each device to maintain its original status. If the power supply status information is inconsistent with the normal power supply status, the second heater around the magnet switch is controlled to heat at a second fixed power until the magnet switch is opened so that the magnet energy is output through the external load connected in parallel with the magnet switch.

3. The liquid helium-free magnet switch protection method according to claim 1, characterized in that... It also includes: Obtain the switching status information of the external switch connected to the first heater; Determine whether the state corresponding to the switch status information is consistent with the preset compression state; If the state corresponding to the switch status information is inconsistent with the squeezing state, then control each device to maintain its original state; If the state corresponding to the switch state information is consistent with the compression state, then the first heater inside the control magnet will heat with a first fixed power for a fixed duration.

4. The liquid helium-free magnet switch protection method according to claim 1, characterized in that... Before judging the switch voltage information, the protection method for liquid helium-free magnet switches also includes: Obtain the magnet's state information; Determine whether the state corresponding to the magnet state information is consistent with the preset excitation state; If the state corresponding to the magnet state information is inconsistent with the excitation state, then the switch voltage information is judged. If the state corresponding to the magnet state information is consistent with the excitation state, then no judgment is made on the switching voltage information.

5. A liquid helium-free magnet switch protection system, characterized in that, The system is used to execute the liquid helium-free magnet switch protection method as described in claim 1, including: The acquisition module is used to acquire the switching voltage information of the magnet switch; The processing module, connected to the acquisition and judgment modules, is used for information storage and processing; The judgment module is used to determine whether the voltage value corresponding to the switch voltage information is greater than the preset upper limit voltage value; If the judgment module determines that the voltage value corresponding to the switch voltage information is not greater than the upper limit voltage value, the processing module controls each device to maintain its original state. If the judgment module determines that the voltage value corresponding to the switch voltage information is greater than the upper limit voltage value, the processing module controls the first heater preset in the magnet to heat at a preset first fixed power for a preset fixed time period, wherein the first heater is set close to any preset coil in the magnet.

6. A protective device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and executed according to any one of claims 1 to 4.

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