Temperature monitoring method and system for LNG cryogenic pump

Abstract

The present invention provides a method for using a temperature monitoring system of an LNG cryogenic pump, and relates to the field of temperature monitoring. The present invention includes a cryogenic pump temperature monitoring system and a method for using the cryogenic pump, wherein the cryogenic pump temperature monitoring system includes a cryogenic pump and a human-computer interaction device, wherein a sensor module is installed on the outside of the cryogenic pump, and the sensor module is electrically connected to the temperature monitoring system to avoid problems with the supply pipeline system connected to the input end or the output pipeline system connected to the output end, which causes the temperature inside the cryogenic pump to rise, and the staff repairs the cryogenic pump, thereby reducing the possibility of misjudgment of the working condition of the cryogenic pump.

Description

Technical Field

[0001] The invention relates to a temperature monitoring method, in particular to a method for using a temperature monitoring system of an LNG cryogenic pump, and belongs to the technical field of temperature monitoring. Background Art

[0002] As LNG (liquefied natural gas) is widely used, LNG filling stations are becoming more and more important. In the process of liquefied natural gas infusion, cryogenic pumps are used, that is, submersible pumps in LNG filling stations, which are key equipment for achieving normal filling operations.

[0003] There is a cold plate in the cryopump that is cooled to a very low temperature by liquid helium or a refrigerator. It condenses the gas and keeps the vapor pressure of the condensate lower than the ultimate pressure of the pump, thereby achieving the effect of pumping gas.

[0004] Therefore, the internal temperature of the cryopump directly affects the working quality of the cryopump. However, the existing cryopump temperature monitoring system has a single function and low monitoring flexibility. In addition, when problems with surrounding equipment cause the internal temperature of the cryopump to be high, it is easy to misjudge it as a problem with the cryopump, resulting in a waste of maintenance time. Summary of the invention

[0005] To solve the above problems, the present invention is implemented through the following technical solutions: a method for using a temperature monitoring system for an LNG cryogenic pump, including a cryogenic pump temperature monitoring system and a method for using the same, the cryogenic pump temperature monitoring system including a cryogenic pump and a human-computer interaction device, a sensor module being installed on the outside of the cryogenic pump, and the sensor module being electrically connected to the temperature monitoring system;

[0006] The temperature monitoring system includes a data processing module, which is electrically connected to a data editing module, a reference model building module and a flow simulation module; the data editing module is electrically connected to a temperature analysis module, which is electrically connected to a report generation module, a data storage module and a problem judgment module; the report generation module is electrically connected to a communication module, the problem judgment module is electrically connected to a fault classification module, the fault classification module is electrically connected to a maintenance simulation module, and the maintenance simulation module is electrically connected to a control generation module.

[0007] Preferably, the cryopump comprises an output end and an input end, the sensor module and the human-computer interaction device are both electrically connected to the data processing module, and the flow simulation module is electrically connected to the data editing module.

[0008] Preferably, the reference model building module is electrically connected to the data storage module, the data storage module is electrically connected to the problem judgment module, and the problem judgment module is electrically connected to the report generation module.

[0009] Preferably, the maintenance simulation module is electrically connected to the human-computer interaction device, the sensor module and the communication module, the data processing module is electrically connected to the maintenance simulation module and the control generation module, the maintenance simulation module and the data processing module are both electrically connected to the report generation module, and the report generation module is electrically connected to the data storage module and the human-computer interaction device.

[0010] The present invention provides a method for using a temperature monitoring system for an LNG cryogenic pump, which has the following beneficial effects:

[0011] 1. The method of using the temperature monitoring system of the LNG cryogenic pump can avoid the situation where the internal temperature of the cryogenic pump rises due to problems with the supply pipeline system connected to the input end or the output pipeline system connected to the output end, and the staff repairs the cryogenic pump, thereby reducing the possibility of misjudgment of the working condition of the cryogenic pump.

[0012] 2. The method of using the temperature monitoring system of the LNG cryogenic pump is that the data processing module edits the control data into an electromechanical control command and transmits it to the electrically connected cryogenic pump. The internal refrigeration structure of the cryogenic pump is adjusted accordingly according to the power of the electromechanical control command to complete the fine-tuning of the cryogenic pump. This avoids the phenomenon that the cryogenic pump with insufficient working power cannot adjust the liquid to the appropriate temperature in time due to the continuous transmission of high-temperature liquid to the interior of the cryogenic pump by the input end, thereby ensuring the stability of the cryogenic pump in transporting cryogenic liquids, providing time for staff to repair the supply pipeline system, and reducing the impact of the supply pipeline system maintenance process on the cryogenic pump's work of transporting liquids.

[0013] 3. The method of using the temperature monitoring system of the LNG cryogenic pump is that the flow simulation module generates a liquid flow model according to the flow data of the liquid at the input end, the cryogenic pump and the output end. The liquid flow model is transmitted to the electrically connected data editing module by the flow simulation module. The data editing module generates a flowing liquid temperature change model according to the temperature data at the corresponding position and the liquid flow model. The flowing liquid temperature change model is transmitted to the report generation module and the data storage module by the data editing module for internal storage, so as to facilitate the subsequent inspection and evaluation of the cryogenic pump working to transport cryogenic liquid.

[0014] 4. The method of using the temperature monitoring system of the LNG cryogenic pump. The evaluation report and the work change simulation model are transmitted to the human-machine interaction device by the report generation module or transmitted to the staff through the communication module. The staff determines whether it is necessary to execute the suggestions given in the control report based on the evaluation report and the work change simulation model. After the staff feeds back to the temperature monitoring system through the human-machine interaction device or the communication module for execution, the control generation module electrically connected to the maintenance simulation module works, and the control generation module sends the pre-stored control data to the data processing module. The data processing module edits the control data into an electromechanical control command and transmits it to the electrically connected cryogenic pump, so that the refrigeration structure in the cryogenic pump works at high power, and the cryogenic pump is automatically controlled, ensuring that the possible results caused by the temperature monitoring system automatically controlling the cryogenic pump are known to the staff in a timely manner, avoiding the situation where the temperature monitoring system automatically controls the cryogenic pump, causing the staff to believe that the cryogenic pump has been working normally, thereby causing the cryogenic pump to be eventually damaged, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the temperature monitoring system of the present invention.

[0016] Description of reference numerals:

[0017] 1. Cryogenic pump; 11. Output end; 12. Input end; 2. Sensor module; 3. Human-computer interaction device; 4. Temperature monitoring system; 41. Data processing module; 42. Data editing module; 43. Temperature analysis module; 44. Report generation module; 45. Reference model establishment module; 46. Data storage module; 47. Problem judgment module; 48. Fault classification module; 49. Communication module; 410. Maintenance simulation module; 411. Control generation module; 412. Flow simulation module. DETAILED DESCRIPTION

[0018] An embodiment of the present invention provides a method for using a temperature monitoring system for an LNG cryogenic pump.

[0019] See also Figure 1The cryogenic pump temperature monitoring system includes a cryogenic pump 1 and a human-computer interaction device 3. A sensor module 2 is installed on the outer side of the cryogenic pump 1, and the sensor module 2 is electrically connected to a temperature monitoring system 4; the temperature monitoring system 4 includes a data processing module 41, the data processing module 41 is electrically connected to a data editing module 42, a reference model building module 45 and a flow simulation module 412, the data editing module 42 is electrically connected to a temperature analysis module 43, the temperature analysis module 43 is electrically connected to a report generation module 44, a data storage module 46 and a problem judgment module 47, the report generation module 44 is electrically connected to a communication module 49, the problem judgment module 47 is electrically connected to a fault classification module 48, the fault classification module 48 is electrically connected to a maintenance simulation module 410, and the maintenance simulation module 410 is electrically connected to a control generation module 411.

[0020] Specific:

[0021] The method of using the temperature monitoring system 4 is as follows:

[0022] Step 1: When the personnel controls the cryopump 1 to work through the human-machine interaction device 3, the required temperature information and the allowable error range of the cryopump 1 working and conveying liquid are input into the human-machine interaction device 3. The required temperature information and the allowable error range are synchronously transmitted by the human-machine interaction device 3 to the electrically connected data processing module 41. The data processing module 41 parses the internal required temperature and the allowable error range into preset temperature data. The data processing module 41 transmits the preset temperature data to the electrically connected data editing module 42. The data editing module 42 generates a comparison diagram 3 according to the required temperature and the allowable error range of the cryopump 1, and generates a comparison diagram 4 according to the required temperature and the allowable error range of the flowing liquid inside the input end 12. Figure 1 , according to the required temperature of the liquid flowing inside the output end 11 and the allowable error range, generate the comparison chart 2, and compare Figure 1 , comparison chart 2 and comparison chart 3 are vertical straight line charts with low temperature values ​​at the bottom and high temperature values ​​at the top. The data editing module 42 compares Figure 1 , comparison chart 2 and comparison chart 3 are transmitted to the electrically connected temperature analysis module 43, and the temperature analysis module 43 is based on the comparison chart Figure 1 , and reference figures 2 and 3 are used as references to monitor and control the cryogenic pump 1.

[0023] Step 2: The cryopump 1 includes an output end 11 and an input end 12. The sensor module 2 is composed of three temperature sensors respectively installed on the outside of the cryopump 1, the outside of the output end 11 and the outside of the input end 12, and three flow rate sensors respectively installed on the outside of the cryopump 1, the outside of the output end 11 and the outside of the input end 12. The temperature sensor is used to collect temperature values, and the flow rate sensor is used to collect flow rate values. The temperature values ​​and flow rate values ​​collected by the sensor module 2 are transmitted by the sensor module 2 to the electrically connected temperature monitoring system 4. The data processing module 41 in the temperature monitoring system 4 is electrically connected to the sensor module 2. The data processing module 41 analyzes and calculates the temperature values ​​and flow rate values ​​into temperature data and flow rate data. The data processing module 41 transmits the temperature data to the electrically connected data editing module Block 42 and reference model building module 45, the data processing module 41 transmits the flow rate data to the electrically connected flow simulation module 412, the flow simulation module 412 generates a liquid flow model according to the flow data of the liquid at the input end 12, the cryogenic pump 1 and the output end 11, the liquid flow model is transmitted to the electrically connected data editing module 42 by the flow simulation module 412, the data editing module 42 generates a flow liquid temperature change model according to the temperature data of the corresponding position and the liquid flow model, the flow liquid temperature change model is transmitted by the data editing module 42 to the report generation module 44 for standby use, and the flow liquid temperature change model is transmitted by the data editing module 42 to the data storage module 46 for storage, so as to facilitate the subsequent inspection and evaluation of the cryogenic liquid transport by the cryogenic pump 1;

[0024] Step 3: The reference model building module 45 builds a reference curve 1 according to the real-time changing temperature data in the input end 12, the reference model building module 45 builds a reference curve 2 according to the real-time changing temperature data in the output end 11, and the reference model building module 45 builds a reference curve 3 according to the real-time changing temperature data in the cryopump 1. The reference curve 1, the reference curve 2 and the reference curve 3 are all horizontally changing curves. The reference curve 1, the reference curve 2 and the reference curve 3 are sent by the reference model building module 45 to the data storage module 46 for storage and real-time update. The reference curve 1, the reference curve 2 and the reference curve 3 are sent by the data storage module 46 to the electrically connected temperature analysis module 43 for use. The temperature analysis module 43 compares the reference curve 1 with the reference curve 2. Figure 1 Comparative analysis, refer to curve 2 and comparison chart 2 for comparative analysis, refer to curve 3 and comparison chart 3 for comparative analysis;

[0025] Step 4: When the comparison result of the temperature analysis module 43 is that the reference curve 1 is higher than the control curve 1 in the continuous time Figure 1At the same time, the reference curve 2 passes through the reference graph 2, and the reference curve 3 passes through the reference graph 3, indicating that there is a problem with the supply pipeline system connected to the input end 12 at this time, resulting in an increase in the temperature of the liquid entering the cryopump 1. The temperature analysis module 43 compares the reference curve 1 with the reference curve 3 during the time period. Figure 1 The comparison screenshot is sent to the electrically connected report generation module 44, and the comparison curve 1 is compared with the control curve 2. Figure 1 The comparison data is transmitted by the temperature analysis module 43 to the internal of the electrical connection problem judgment module 47, and the problem judgment module 47 judges that the reference curve is far away from the control curve. Figure 1 The year-on-year growth of the distance from the highest point, when the year-on-year growth remains unchanged, the problem judgment module 47 judges that the supply pipeline system has a heat insulation and sealing problem, and when the year-on-year growth is in an increasing trend, the problem judgment module 47 judges that the supply pipeline system has a heat preservation problem, and the problem judgment module 47 transmits the problem of the supply pipeline system as maintenance reference data to the electrically connected report generation module 44, and the report generation module 44 generates a fault suggestion report 1 for the supply pipeline system according to the maintenance reference data and the screenshot, and the fault suggestion report 1 is transmitted to the electrically connected data storage module 46 by the report generation module 44, and the data storage module 46 stores the fault suggestion report 1 to complete the work monitoring of the cryopump 1; when the cryopump 1 is in a harsh working environment and the area around the cryopump 1 does not meet the needs of staff activities, the report generation module 44 sends the fault suggestion report 1 to the staff through the electrically connected communication module 49; when the working environment of the cryopump 1 is good and the human-machine interaction device 3 can be set, the fault suggestion report 1 is sent to the human-machine interaction device 3 by the report generation module 44, and the human-machine interaction device 3 sends an alarm while the fault suggestion report 1 is displayed on the human-machine interaction device 3, reminding the staff to repair the supply pipeline system;

[0026] Step 5: When the year-on-year growth remains unchanged or fluctuates within a small range, the fault classification module 48 electrically connected to the problem judgment module 47 determines that the cryopump 1 encounters a minor fault during operation. After the maintenance simulation module 410 electrically connected to the fault classification module 48 receives the judgment result generated by the fault classification module 48, the maintenance simulation module 410 controls the control generation module 411 electrically connected to operate. The maintenance simulation module 410 calculates the estimated increase ratio of the power of the internal refrigeration structure of the cryopump 1 according to the year-on-year growth value. The estimated power increase ratio is transmitted by the maintenance simulation module 410 to the control generation module 411 electrically connected. The control generation module 411 calculates the estimated power increase ratio and the existing power of the internal refrigeration structure of the cryopump 1 according to the estimated power increase ratio. Output control data, the control data is transmitted to the electrically connected data processing module 41 by the control generation module 411, the data processing module 41 edits the control data into an electromechanical control command and transmits it to the electrically connected cryogenic pump 1, the internal refrigeration structure of the cryogenic pump 1 is adjusted accordingly according to the power of the electromechanical control command, and the fine-tuning of the cryogenic pump 1 is completed; it is avoided that the input end 12 continuously transmits a high-temperature liquid to the inside of the cryogenic pump 1, resulting in the phenomenon that the cryogenic pump 1 with insufficient working power cannot adjust the liquid to a suitable temperature in time, the stability of the cryogenic pump 1 in transporting the cryogenic liquid is ensured, time is provided for the staff to repair the supply pipeline system, and the influence of the supply pipeline system maintenance process on the liquid transporting work of the cryogenic pump 1 is reduced.

[0027] When the real-time changing reference curve 2 is always higher than the highest point of the reference curve 2 during the time period, and the reference curve 1 passes through the reference curve 2 at the same time, Figure 1 , reference curve 3 passes through comparison chart 3, indicating that at this time, a problem occurs in the output pipeline system connected to the output end 11, causing the temperature of the liquid leaving the cryopump 1 to rise. At this time, the temperature monitoring system 4 performs the above-mentioned cryopump 1 operation monitoring work. During this process, the report generation module 44 generates a fault suggestion report 2 for the output pipeline system. The fault suggestion report 2 is sent to the human-computer interaction device 3 or to the work through the communication module 49, and the staff performs corresponding processing work.

[0028] This prevents the supply pipe system connected to the input end 12 or the output pipe system connected to the output end 11 from having problems, which may cause the internal temperature of the cryopump 1 to rise, and the staff from repairing the cryopump 1, thereby reducing the possibility of misjudgment of the working condition of the cryopump 1.

[0029] When the real-time reference curve is always higher than the control Figure 1, when reference curve 2 is always higher than reference curve 2 and reference curve 3 is always higher than reference curve 3, the temperature analysis module 43 generates a high-power operation suggestion for the refrigeration structure inside the cryopump 1, and the report generation module 44 generates a control report according to the high-power operation suggestion for the refrigeration structure. The control report is sent by the report generation module 44 to the human-computer interaction device 3 or to the staff through the communication module 49; at the same time, the control report is transmitted by the temperature analysis module 43 to the electrically connected report generation module 44 and the problem judgment module 47. After the problem judgment module 47 receives the control report, the problem judgment module 47 electrically connects the fault The fault classification module 48 determines that the cryopump 1 encounters a major accident, and the result of the major accident is obtained by the maintenance simulation module 410 electrically connected to the fault classification module 48; at the same time, the data storage module 46 transmits the flowing liquid temperature change model to the maintenance simulation module 410 through the problem judgment module 47 and the fault classification module 48. The maintenance simulation module 410 generates a working change simulation model based on the liquid nitrogen storage amount in the refrigeration structure, the filtration change of the refrigeration structure, the expected temperature change and the flowing liquid temperature change model. The working change simulation model is transmitted by the maintenance simulation module 410 to the electrically connected report generation module 44. The report generation module 44 analyzes the impact of the high-power operation of the refrigeration structure on the subsequent work of the cryopump 1 according to the work change simulation model. The report generation module 44 generates an evaluation report according to the impact. The evaluation report and the work change simulation model are both transmitted by the report generation module 44 to the human-machine interaction device 3 or to the staff through the communication module 49. The staff determines whether it is necessary to execute the suggestions given in the control report according to the evaluation report and the work change simulation model. After the staff feeds back to the temperature monitoring system 4 through the human-machine interaction device 3 or the communication module 49 for execution, the control generation module 411 electrically connected to the maintenance simulation module 410 works, and the control generation module 411 sends the pre-stored control data to the data processing module 41. The data processing module 41 edits the control data into an electromechanical control command and transmits it to the electrically connected cryopump 1, so that the refrigeration structure in the cryopump 1 works at high power and the automatic control of the cryopump 1 is completed, ensuring that the results that may be caused by the automatic control of the cryopump 1 by the temperature monitoring system 4 are known to the staff in a timely manner, avoiding the situation where the temperature monitoring system 4 automatically controls the cryopump 1, causing the staff to believe that the cryopump 1 has been working normally, thereby causing the cryopump 1 to be damaged in the end, thereby reducing economic losses.

[0030] When only reference curve 2 is higher than reference curve 2 and reference curve 3 is higher than reference curve 3, the temperature analysis module 43 generates a judgment that the internal temperature of the cryopump 1 is high. The judgment that the internal temperature of the cryopump 1 is high is transmitted by the temperature analysis module 43 to the electrically connected report generation module 44. The report generation module 44 generates a report on the internal temperature drop of the cryopump 1. The report generation module 44 directly sends the report on the internal temperature drop of the cryopump 1 to the human-computer interaction device 3 or sends it to the staff through the communication module 49. At the same time, the problem judgment module 47 judges that the reference curve three is higher than the growth ratio of the comparison chart three with time. When the growth ratio remains unchanged or is within a smaller numerical range, the fault classification module 48 judges that the cryopump 1 encounters a minor fault, and the temperature monitoring system 4 performs fine-tuning of the cryopump 1; when the growth ratio is in an overall growth trend, the fault classification module 48 judges that the cryopump 1 encounters a major accident, and the temperature monitoring system 4 performs automatic control of the cryopump 1. At the same time, the report generation module 44 in the temperature monitoring system 4 generates a refrigeration structure damage report, and the refrigeration structure damage report is sent by the temperature monitoring system 4 to the human-computer interaction device 3 or the staff, so as to promptly discover the damage of the refrigeration structure in the cryopump 1, so that the staff can repair the damage to the refrigeration structure in time, and avoid the situation that the staff can only discover the damage after the refrigeration structure is completely damaged, thereby reducing economic losses.

Claims

1. A method for using a temperature monitoring system for an LNG cryogenic pump, comprising a cryogenic pump temperature monitoring system and a method for using the system, wherein the cryogenic pump temperature monitoring system comprises a cryogenic pump (1) and a human-computer interaction device (3), and is characterized in that: A sensor module (2) is installed on the outside of the cryopump (1); the sensor module (2) is electrically connected to a temperature monitoring system (4); the temperature monitoring system (4) comprises a data processing module (41); the data processing module (41) is electrically connected to a data editing module (42), a reference model building module (45) and a flow simulation module (412); the data editing module (42) is electrically connected to a temperature analysis module (43); the temperature analysis module (43) is electrically connected to a report generation module (44), a data storage module (46) and a problem judgment module (47); The report generation module (44) is electrically connected to a communication module (49), the problem judgment module (47) is electrically connected to a fault classification module (48), the fault classification module (48) is electrically connected to a maintenance simulation module (410), and the maintenance simulation module (410) is electrically connected to a control generation module (411); the cryogenic pump (1) comprises an output end (11) and an input end (12), the sensor module (2) and the human-computer interaction device (3) are both electrically connected to a data processing module (41), and the flow simulation module (412) is electrically connected to a data editing module (42); The method of use includes the following steps: Step 1: input the required temperature information and allowable error range of the working liquid transported by the cryopump (1) into the human-computer interaction device (3); the data editing module (42) generates a comparison chart 3 according to the required temperature information and allowable error range of the cryopump (1); generates a comparison chart 1 according to the required temperature and allowable error range of the internal flowing liquid at the input end (12); generates a comparison chart 2 according to the required temperature and allowable error range of the internal flowing liquid at the output end (11); the comparison charts 1, 2 and 3 are vertical straight line charts with low temperature values ​​at the bottom and high temperature values ​​at the top; the temperature analysis module (43) monitors and controls the cryopump (1) based on the comparison charts 1, 2 and 3; Step 2: The sensor module (2) is composed of three temperature sensors respectively installed on the outside of the cryopump (1), the outside of the output end (11) and the outside of the input end (12), and three flow rate sensors respectively installed on the outside of the cryopump (1), the outside of the output end (11) and the outside of the input end (12). The temperature sensor is used to collect temperature values, and the flow rate sensor is used to collect flow rate values. The temperature values ​​and flow rate values ​​collected by the sensor module (2) are transmitted to the electrically connected temperature monitoring system (4) by the sensor module (2). The data processing module (41) parses and calculates the temperature values ​​and flow rate values ​​into temperature data and flow rate data. The data processing module (41) The processing module (41) transmits the temperature data to the electrically connected data editing module (42) and the reference model building module (45); the data processing module (41) transmits the flow rate data to the electrically connected flow simulation module (412); the flow simulation module (412) generates a liquid flow model according to the flow data of the liquid at the input end (12), the cryogenic pump (1) and the output end (11); the liquid flow model is transmitted by the flow simulation module (412) to the electrically connected data editing module (42); the data editing module (42) generates a flowing liquid temperature change model according to the temperature data at the corresponding position and the liquid flow model; Step 3: The reference model building module (45) constructs a reference curve 1 according to the temperature data that changes in real time in the input end (12), the reference model building module (45) constructs a reference curve 2 according to the temperature data that changes in real time in the output end (11), and the reference model building module (45) constructs a reference curve 3 according to the temperature data that changes in real time in the cryopump (1). The reference curve 1, the reference curve 2 and the reference curve 3 are all horizontally changing curves. The reference curve 1, the reference curve 2 and the reference curve 3 are transmitted to the temperature analysis module (43) for internal use. The temperature analysis module (43) compares and analyzes the reference curve 1 with the reference graph 1, the temperature analysis module (43) compares and analyzes the reference curve 2 with the reference graph 2, and the temperature analysis module (43) compares and analyzes the reference curve 3 with the reference graph 3; Step 4: When the comparison result of the temperature analysis module (43) is that the reference curve 1 is higher than the comparison chart 1 in continuous time, and the reference curve 2 crosses the comparison chart 2 and the reference curve 3 crosses the comparison chart 3 at the same time, the problem judgment module (47) judges the year-on-year growth of the distance between the reference curve 1 and the highest point of the comparison chart 1. When the year-on-year growth remains unchanged, the problem judgment module (47) judges that the supply pipeline system has a thermal insulation and sealing problem. When the year-on-year growth is in an increasing trend, the problem judgment module (47) judges that the supply pipeline system has a thermal insulation problem. The report generation module (44) generates a fault suggestion report 1 for the supply pipeline system based on the maintenance reference data and the screenshot. The fault suggestion report 1 is transmitted by the report generation module (44) to the electrically connected data storage module (46). The data storage module (46) stores the fault suggestion report 1, thereby completing the work monitoring of the cryogenic pump (1). Step 5: When the year-on-year growth remains unchanged or fluctuates within a small range, the fault classification module (48) electrically connected to the problem judgment module (47) determines that the cryopump (1) has encountered a minor fault during operation, and the data processing module (41) edits the control data into an electromechanical control command and transmits it to the electrically connected cryopump (1). The internal refrigeration structure of the cryopump (1) is adjusted accordingly according to the power of the electromechanical control command.

2. The method for using the temperature monitoring system of the LNG cryogenic pump according to claim 1, characterized in that: The reference model building module (45) is electrically connected to the data storage module (46), the data storage module (46) is electrically connected to the problem judgment module (47), and the problem judgment module (47) is electrically connected to the report generation module (44).

3. The method for using the temperature monitoring system of the LNG cryogenic pump according to claim 1, characterized in that: The maintenance simulation module (410) is electrically connected to the human-machine interaction device (3), the sensor module (2) and the communication module (49); the data processing module (41) is electrically connected to the maintenance simulation module (410) and the control generation module (411); the maintenance simulation module (410) and the data processing module (41) are both electrically connected to the report generation module (44); and the report generation module (44) is electrically connected to the data storage module (46) and the human-machine interaction device (3).

4. The method for using the temperature monitoring system of the LNG cryogenic pump according to claim 1, characterized in that: During the implementation of step 5, when the real-time changing reference curve 2 is always higher than the highest point of the reference graph 2 during the time period, and at the same time, the reference curve 1 passes through the reference graph 1 and the reference curve 3 passes through the reference graph 3, the report generation module (44) generates a fault suggestion report 2 for the output pipeline system.

5. The method for using the temperature monitoring system of the LNG cryogenic pump according to claim 1, characterized in that: During the implementation of step 5, when the real-time changing reference curve 1 is always higher than the control graph 1, the reference curve 2 is always higher than the control graph 2, and the reference curve 3 is always higher than the control graph 3, the temperature analysis module (43) generates a high-power operation suggestion for the internal refrigeration structure of the cryopump (1), and the report generation module (44) generates a control report based on the high-power operation suggestion for the refrigeration structure; the problem judgment module (47) and the electrically connected fault classification module (48) judge that the cryopump (1) has encountered a major accident, the maintenance simulation module (410) generates a work change simulation model based on the liquid nitrogen storage volume in the refrigeration structure, the filtration change of the refrigeration structure, the expected temperature change and the flowing liquid temperature change model, the report generation module (44) analyzes the impact of the high-power operation of the refrigeration structure on the subsequent work of the cryopump (1) based on the work change simulation model, and the report generation module (44) generates an evaluation report based on the impact caused.

6. The method for using the temperature monitoring system of the LNG cryogenic pump according to claim 1, characterized in that: During the implementation of step 5, when only reference curve 2 is higher than reference graph 2 and reference curve 3 is higher than reference graph 3, the temperature analysis module (43) generates a judgment that the internal temperature of the cryopump (1) is high, and the report generation module (44) generates a report on the internal temperature drop of the cryopump (1). At the same time, the problem judgment module (47) judges the growth ratio of the reference curve 3 to the reference graph 3 over time. When the growth ratio remains unchanged or is within a small numerical range, the fault classification module (48) judges that the cryopump (1) has encountered a minor fault, and the temperature monitoring system (4) performs fine-tuning of the cryopump (1); when the growth ratio is in an overall growth trend, the fault classification module (48) judges that the cryopump (1) has encountered a major accident, the temperature monitoring system (4) performs automatic control of the cryopump (1), and the report generation module (44) in the temperature monitoring system (4) generates a report on the damage of the refrigeration structure.

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