High-voltage cable tin sealing method, system, equipment, medium and product

Abstract

The invention relates to the technical field of cable tin sealing, and discloses a high-voltage cable tin sealing method, system and equipment, a medium and a product, and the method achieves the precise control of the heating and cooling process of a cable terminal tail pipe through obtaining the tin sealing process parameters and combining with the preset PID control parameters. The problem of non-uniform tin melting or insufficient cooling caused by too high or too low temperature can be effectively avoided, so that the tin sealing quality and the process stability are remarkably improved, and the technical problem of how to improve the tin sealing quality and the tin sealing process stability of the high-voltage cable is solved. Meanwhile, a segmented cooling strategy is adopted, the cooling process is decomposed into multiple segments of smooth cooling paths, the influence of sudden temperature change on the tin material solidification process is effectively avoided, the safety risk caused by sudden temperature change in the construction process is remarkably reduced, the operation process is simplified, the technology is easier to implement, and the production cost is reduced. And the stability and the reliability of the tin sealing process are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable tin sealing, and in particular to a high-voltage cable tin sealing method, system, equipment, medium and product. Background Art

[0002] With the continuous acceleration of urban construction, people's requirements for power supply reliability are increasing day by day. Many processes of cable terminal joints still retain manual production and installation, which has become a weak link in the operation of high-voltage cables. Among them, lead sealing is the core process of sealing, waterproofing and reliable grounding of terminal joints. The installation process varies from person to person, which is bound to bring more uncontrollable factors to construction and operation and maintenance. During the lead sealing process, the cooling rate of the solder material will affect the quality of the lead sealing, and the difference in ambient temperature makes it difficult to control the cooling rate. In recent years, the investigation of the lead sealing of the cable terminal tail tube has found many serious hidden dangers such as cold welding, sinking and fracture, moisture and water ingress in the lead sealing part caused by unqualified lead sealing process. The process quality of lead sealing largely determines the service life of cable terminals and joints. Therefore, a more technically advanced lead sealing process is needed to ensure that the lead sealing, electrical connection quality and cooling rate are controllable, eliminate the risks brought by open flame operations, avoid the occurrence of cable thermal damage, reduce the difficulty of lead sealing and improve the efficiency of lead sealing.

[0003] At present, the existing technology relies on manual experience or simple temperature control equipment, which makes it difficult to accurately control the heating temperature and time, and easily leads to over-high or over-low temperature, affecting the quality of tin sealing. Summary of the invention

[0004] The present invention provides a high-voltage cable tin sealing method, system, equipment, medium and product, which solves the technical problem of how to improve the tin sealing quality of the high-voltage cable and the stability of the tin sealing process.

[0005] A first aspect of the present invention provides a high-voltage cable tin sealing method, which is applied to the tin sealing device, and the method comprises:

[0006] Acquiring tin sealing process parameters associated with the tin sealing device;

[0007] A preset amount of tin material is used to evenly smear the lower end of the cable terminal tail pipe of the tin sealing device, and a fireproof mud is used to fill the lower end of the cable terminal tail pipe.

[0008] The cable terminal tail tube is heated based on preset PID control parameters, and a first real-time temperature of a tin molten pool formed after the tin material in the cable terminal tail tube is heated and melted is obtained;

[0009] When the first real-time temperature is lower than the preset safety temperature threshold, determining whether a preset heating time condition is met;

[0010] If the preset heating time condition is met, the cable terminal tail pipe is cooled in sections based on the preset PID control parameters until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud at the lower end of the cable terminal tail pipe is removed.

[0011] Optionally, the tin sealing process parameters further include ambient temperature, and also include:

[0012] When the first real-time temperature is greater than or equal to a preset safety temperature threshold, the first real-time temperature, the preset safety temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to output updated PID control parameters;

[0013] Based on the updated PID control parameters, the step of heating the cable terminal tail pipe based on the preset PID control parameters is skipped and executed.

[0014] Optionally, if the preset heating time condition is met, the cable terminal tail pipe is cooled in sections based on the preset PID control parameters until the temperature of the tin molten pool is less than or equal to a preset cooling temperature threshold, and the fireproof mud at the lower end of the cable terminal tail pipe is removed, comprising:

[0015] If the preset heating time condition is met, the second real-time temperature of the molten tin pool is obtained, and the cable terminal tail pipe is cooled in sections based on the updated PID control parameters until the cooling of all time periods is completed;

[0016] Obtaining a third real-time temperature of the tin molten pool;

[0017] comparing the third real-time temperature with a preset cooling temperature threshold;

[0018] When the third real-time temperature is less than or equal to the preset cooling temperature threshold, the fireproof mud at the lower end of the cable terminal tail pipe is removed.

[0019] Optionally, the tin sealing process parameters further include tin material thermal performance parameters, and if the preset heating time condition is met, the second real-time temperature of the tin molten pool is obtained, and the cable terminal tail tube is cooled in sections based on the updated PID control parameters until the cooling of all time periods is completed, including:

[0020] If the preset heating time condition is met, obtaining a second real-time temperature of the molten tin pool;

[0021] Determining a total cooling time according to the second real-time temperature, the tin material thermal performance parameter and the ambient temperature;

[0022] The total cooling time is calculated by ratioing the total cooling time with the preset number of segments to obtain the time interval of each period;

[0023] Using the time interval of the first time period, the second real-time temperature, the thermal performance parameter of the tin material and the ambient temperature to input a preset target cooling temperature function, outputting the target cooling temperature of the first time period;

[0024] Cooling the cable terminal tail tube based on the preset PID control parameters until the temperature of the tin molten pool reaches the target cooling temperature;

[0025] The target cooling temperature is used as a new second real-time temperature, and the time intervals of all time periods are traversed until the cooling of all time periods is completed.

[0026] Optionally, it also includes:

[0027] When the third real-time temperature is greater than the preset cooling temperature threshold, the third real-time temperature, the preset cooling temperature threshold and the ambient temperature are input into a pre-trained multi-layer perceptron neural network model to output updated PID control parameters;

[0028] Based on the updated PID control parameters, the step of cooling the cable terminal tail pipe in sections based on the updated PID control parameters is skipped and executed.

[0029] Optionally, the tin material thermal performance parameters include tin material specific heat capacity, tin material density, tin material volume, convection heat transfer coefficient, contact surface area and thermal conductivity, and determining the total cooling time according to the second real-time temperature, the tin material thermal performance parameters and the ambient temperature includes:

[0030] Performing a difference operation between the second real-time temperature and the ambient temperature to obtain a target difference;

[0031] Performing a multiplication operation using the specific heat capacity of the tin material, the density of the tin material, the volume of the tin material, and the target difference to obtain a target multiplication value;

[0032] The convective heat transfer coefficient, the contact surface area and the target difference are used to perform a multiplication operation to obtain a convective heat transfer amount;

[0033] The thermal conductivity is multiplied by the volume of the tin material to obtain the thermal conduction amount;

[0034] Performing a sum operation using the convective heat transfer amount and the heat conduction amount to obtain a target sum value;

[0035] The target multiplication value and the target sum value are used to perform a ratio operation to obtain the total cooling time.

[0036] A second aspect of the present invention provides a high-voltage cable tin-sealing system, which is applied to the tin-sealing device, comprising:

[0037] A parameter acquisition module, used to acquire the tin sealing process parameters associated with the tin sealing device;

[0038] A tin coating module is used to evenly coat the lower end of the cable terminal tail tube of the tin sealing device with a preset amount of tin, and fill the lower end of the cable terminal tail tube with fireproof mud;

[0039] A first data processing module is used to heat the cable terminal tail tube based on preset PID control parameters, and obtain a first real-time temperature of a tin molten pool formed after the tin material in the cable terminal tail tube is heated and melted;

[0040] A second data processing module, configured to determine whether a preset heating time condition is met when the first real-time temperature is lower than the preset safety temperature threshold;

[0041] The fireproof mud removal module is used to cool the cable terminal tail pipe in sections based on the preset PID control parameters if the preset heating time condition is met, until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and then remove the fireproof mud at the lower end of the cable terminal tail pipe.

[0042] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the high-voltage cable tin sealing method as described in any one of the above items.

[0043] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the high-voltage cable tin sealing method as described in any one of the above items.

[0044] A fifth aspect of the present invention provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the high-voltage cable tin sealing method as described in any one of the above items.

[0045] It can be seen from the above technical solutions that the present invention has the following advantages:

[0046] The present invention achieves precise control of the heating and cooling process of the cable terminal tail pipe by obtaining the tin sealing process parameters and combining them with the preset PID control parameters, which can effectively avoid the problem of uneven melting of tin material or insufficient cooling caused by too high or too low temperature, thereby significantly improving the tin sealing quality and process stability, and solving the technical problem of how to improve the tin sealing quality and tin sealing process stability of high-voltage cables. At the same time, a segmented cooling strategy is adopted to decompose the cooling process into multiple smooth cooling paths, which effectively avoids the influence of sudden temperature changes on the solidification process of tin material, not only significantly reducing the safety risks caused by sudden temperature changes during the construction process, but also simplifying the operation process, making the process easier to implement, and further improving the stability and reliability of the tin sealing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 A flowchart of the steps of a high-voltage cable tin sealing method provided in Embodiment 1 of the present invention;

[0049] Figure 2 A flowchart of the steps of a high voltage cable tin sealing method provided in the second embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the installation structure of the tin sealing device provided in the second embodiment of the present invention;

[0051] Figure 4 This is a diagram showing the tin sealing effect of the tin sealing device provided in the second embodiment of the present invention;

[0052] Figure 5 A heating flow chart provided for the second embodiment of the present invention;

[0053] Figure 6 A cooling flow chart provided for the second embodiment of the present invention;

[0054] Figure 7 A structural block diagram of a high-voltage cable tin sealing system provided in Embodiment 3 of the present invention;

[0055] Figure 8 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention.

[0056] The meanings of the reference numerals are as follows:

[0057] 1. Cable terminal tail pipe; 2. Tin material; 3. Fireproof mud; 4. Temperature control heating fixture; 5. Refrigeration module; 6. Time and temperature operation control panel; 7. Thermocouple sensor. DETAILED DESCRIPTION

[0058] The embodiments of the present invention provide a high-voltage cable tin sealing method, system, equipment, medium and product, which are used to solve the technical problem of how to improve the tin sealing quality of the high-voltage cable.

[0059] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] The traditional lead sealing method is completed manually by accessory installers at the construction site, which has the following disadvantages: (1) The lead sealing process is difficult, and unqualified workers may lead to poor sealing and unreliable electrical connections. As the operating time increases, water may gradually enter the cable and the cable may become damp. (2) The temperature of the gas gun is difficult to control, and uneven heating may easily burn the cable body, resulting in a decrease in service life. (3) In order to make the solder molten during the heating operation, the solder is composed of tin and lead in a certain proportion, which increases the melting point and resistivity. (4) Personnel training also requires a lot of time and money, and the lead sealing operation is inefficient and time-consuming. (5) When sealing the lead, it is necessary to use a gas gun with open flame, but there is a fire risk in most GIS terminals and other substations, and using open flames to seal the lead brings great inconvenience. (6) The lead sealing process has high requirements on the accuracy and stability of temperature control, which are difficult to meet with the traditional PID control method. The present invention utilizes the method of optimizing the parameters of the PID controller using a multi-layer perceptron neural network (MLP) to achieve accurate and efficient adjustment of the temperature control system, thereby improving the system's adaptability and control accuracy. The user interface and communication interface provide convenient operation and monitoring means.

[0061] See also Figure 1 , Figure 1 A flowchart of the steps of a high-voltage cable tin sealing method provided in Embodiment 1 of the present invention.

[0062] The present invention provides a high-voltage cable tin sealing method, which is applied to a tin sealing device, comprising:

[0063] Step 101: Obtain tin sealing process parameters associated with a tin sealing device.

[0064] The tin sealing device refers to a special device used for the tin sealing process of high-voltage cable terminal joints. Its main function is to evenly melt and solidify the tin material 2 in the cable terminal tail tube 1 by accurately controlling the heating and cooling process, thereby achieving a reliable connection between the high-voltage cable metal sheath and the terminal tail tube.

[0065] The tin sealing process parameters refer to the key physical and environmental parameters that affect the tin sealing quality and process effect during the tin sealing process of the high-voltage cable terminal connector. By precisely controlling these parameters, uniform melting and solidification of the tin material 2 can be achieved, ensuring reliable connection of the high-voltage cable terminal connector.

[0066] In an embodiment of the present invention, in response to receiving a request instruction to tin-seal a high-voltage cable terminal connector, tin-seal process parameters associated with a tin-seal device during the tin-seal process are acquired.

[0067] Step 102 , use a preset amount of tin material 2 to evenly smear the lower end of the cable terminal tail tube 1 of the tin sealing device, and use fireproof mud 3 to fill the lower end of the cable terminal tail tube 1.

[0068] The preset dosage refers to the predetermined usage amount of the tin material 2 to ensure the accuracy and reliability of the tin sealing process.

[0069] Tin material 2 refers to a metal material used in the tin sealing process, which realizes the sealed connection of the cable terminal joint through melting and solidification.

[0070] The cable terminal tail tube 1 refers to the core component of the tin sealing process, which contains the tin material 2 and realizes its melting and solidification.

[0071] The fireproof mud 3 refers to a fireproof material used to fill the lower end of the tail pipe to prevent the tin material 2 from overflowing and provide fire protection.

[0072] In the embodiment of the present invention, a predetermined amount of tin material 2 is used to evenly apply the lower end of the cable terminal tail tube 1 of the tin sealing device. After the application is completed, the lower end of the cable terminal tail tube 1 is filled with fireproof mud 3.

[0073] Step 103 : heating the cable terminal tail tube 1 based on preset PID control parameters, and obtaining a first real-time temperature of a tin molten pool formed after the tin material 2 in the cable terminal tail tube 1 is heated and melted.

[0074] The preset PID control parameters refer to the parameters of the PID (proportional-integral-differential) control algorithm pre-set for the temperature control process in the tin sealing process, including the proportional coefficient (P), integral coefficient (I) and differential coefficient (D). The PID control parameters are used to accurately adjust the output power of the heating equipment and the cooling equipment to ensure that the tin material 2 in the cable terminal tail tube 1 can be evenly heated and segmented cooled to reach the target temperature, avoiding tin sealing quality problems caused by too high or too low temperature.

[0075] It is worth mentioning that the preset PID control parameters include the preset PID control parameters of the heating stage and the preset PID control parameters of the cooling stage. Due to the different control objectives and control characteristics of the heating stage and the cooling stage, the preset PID control parameters are inconsistent in the heating stage and the cooling stage. The parameters of the heating stage focus on fast response and stable heating, while the parameters of the cooling stage focus on smooth cooling and avoiding fluctuations. Therefore, in practical applications, it is necessary to optimize and set the PID control parameters according to process requirements.

[0076] The tin molten pool refers to the liquid tin area formed after the tin material 2 in the cable terminal tail tube 1 is heated and melted. The tin molten pool is the key state of the tin sealing process. Its temperature distribution and fluidity directly affect the filling effect and solidification quality of the tin material 2. By real-time monitoring and controlling the temperature of the tin molten pool, the stability and reliability of the tin sealing process can be ensured.

[0077] The first real-time temperature refers to the temperature data of the tin melt pool collected in real time by the thermocouple sensor 7 or other temperature measuring equipment. The first real-time temperature is an important monitoring indicator of the tin sealing process, which is used to feedback control the output power of the heating equipment to ensure that the temperature of the tin melt pool is always within the preset range, thereby achieving precise tin sealing process control.

[0078] In an embodiment of the present invention, a temperature-controlled heating fixture 4 of a tin-sealing device is arranged on the outside of a cable terminal tail tube 1. The tin-sealing device is provided with an STM32 single-chip microcomputer. The PID control parameters of a preset heating stage are input into the STM32 single-chip microcomputer. The controller calculates the output power of the temperature-controlled heating fixture 4 according to the PID control algorithm. The temperature-controlled heating fixture 4 heats the cable terminal tail tube 1. A thermocouple sensor 7 is arranged on the inner side of the cable terminal tail tube 1 at the tin-sealing position, which is used to obtain in real time the first real-time temperature of a tin molten pool formed after the tin material 2 in the cable terminal tail tube 1 is heated and melted.

[0079] Step 104: When the first real-time temperature is lower than a preset safety temperature threshold, determine whether a preset heating time condition is met.

[0080] The preset safety temperature threshold refers to a pre-set upper temperature limit value used to ensure the safety of the heating process.

[0081] The preset heating time condition refers to a preset heating time threshold, which is used to ensure that the tin material 2 is fully melted and reaches the target temperature.

[0082] In an embodiment of the present invention, the first real-time temperature is compared to be lower than the preset safety temperature threshold. During the heating process of the tin sealing process, when the first real-time temperature monitored in real time is lower than the preset safety temperature threshold, it is further determined whether the current heating time meets the preset heating time condition, that is, whether the current heating time reaches the preset heating time threshold.

[0083] Step 105: If the preset heating time condition is met, the cable terminal tail pipe 1 is cooled in sections based on the preset PID control parameters until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud 3 at the lower end of the cable terminal tail pipe 1 is removed.

[0084] Segmented cooling refers to dividing the cooling process into multiple stages in the tin sealing process, using different cooling rates or control parameters in each stage to achieve a smooth and controllable cooling process.

[0085] In an embodiment of the present invention, when the heating time meets the preset heating time condition, that is, the heating time has reached the preset heating time threshold, it means that the heating process has been completed, and then the PID control parameters of the preset cooling stage are input into the STM32 single-chip computer, and the controller calculates the output power of the refrigeration module 5 according to the PID control algorithm. The refrigeration module 5 cools the cable terminal tail pipe 1 in sections until the temperature of the tin molten pool has dropped below the preset cooling temperature threshold to ensure that the tin material 2 has been completely solidified and meets the process requirements. The fireproof mud 3 at the lower end of the cable terminal tail pipe 1 is removed to complete the tin sealing process.

[0086] The present invention realizes the precise control of the heating and cooling process of the cable terminal tail pipe 1 by obtaining the tin sealing process parameters and combining the preset PID control parameters, which can effectively avoid the problem of uneven melting or insufficient cooling of the tin material 2 caused by too high or too low temperature, thereby significantly improving the tin sealing quality and process stability, and solving the technical problem of how to improve the tin sealing quality and tin sealing process stability of high-voltage cables. At the same time, a segmented cooling strategy is adopted to decompose the cooling process into multiple smooth cooling paths, which effectively avoids the influence of temperature mutation on the solidification process of the tin material 2, not only significantly reducing the safety risks caused by temperature sudden changes during the construction process, but also simplifying the operation process, making the process easier to implement, and further improving the stability and reliability of the tin sealing process. In addition, the heating and cooling process is optimized based on the preset PID parameters, which greatly shortens the heating time, improves the tin sealing efficiency and reduces the construction cost. By real-time monitoring of the tin melting pool temperature and combining the preset threshold, the uniformity of the tin material 2 during the melting and cooling process is ensured, and the reliability of the connection between the high-voltage cable metal sheath and the terminal tail pipe is further enhanced, and the service life of the joint is extended. It is worth mentioning that the present invention does not require open flame operation and uses low-melting-point tin solder, which not only reduces environmental pollution but also reduces the health risks of operators, and provides an efficient, safe and reliable solution for tin sealing of high-voltage cable terminal joints.

[0087] See also Figure 2 , Figure 2 A flowchart of the steps of a high-voltage cable tin sealing method provided in Embodiment 2 of the present invention.

[0088] In order to solve the problems that are difficult to avoid in the existing manual lead sealing method, the patent of this invention proposes a PID digital temperature-controlled high-voltage cable automatic tin sealing device based on a multi-layer perceptron neural network model (MLP). A certain amount of tin solder is pre-applied on the inner wall of the terminal head and tail tube before leaving the factory. The sealing can be completed on site only through the temperature and heating time control device, thereby effectively solving the problems of uneven heating, poor soldering and poor sealing, and the cooling rate being greatly affected by the ambient temperature, getting rid of the dependence on the operating level of the sealing workers, saving time and effort, and being safe and reliable.

[0089] A high-voltage cable tin sealing method provided by the present invention is applied to a tin sealing device, which includes a cable terminal tail pipe 1, tin material 2, fireproof mud 3, a temperature control heating fixture 4, a cooling plate module 5, a time and temperature operation control panel 6 and a thermocouple sensor 7;

[0090] See also Figure 3 , Figure 3 A schematic diagram of the installation structure of the tin sealing device provided in the second embodiment of the present invention;

[0091] The cooling plate module 5 and the temperature control heating fixture 4 are both arranged around the outside of the cable terminal tail pipe 1;

[0092] The solder 2 is arranged on the inner wall of the lower end of the cable terminal tail pipe 1;

[0093] The lower end opening of the cable terminal tail pipe 1 is filled with fireproof mud 3;

[0094] The time and temperature operation control panel 6 is electrically connected to the temperature control heating fixture 4, the thermoelectric cooler module 5, and the thermocouple sensor 7 respectively;

[0095] The thermocouple sensor 7 is arranged inside the cable terminal tail pipe 1 and is used to detect the real-time temperature of the tin melt pool formed after the solder 2 is heated and melted;

[0096] The temperature control heating fixture 4 is of an openable and closable structure and can be conveniently installed on the cable terminal tail pipe 1; specifically, it is a heating element with a U-shaped opening structure, fixed by strong screws, which is convenient for wrapping the cable terminal tail pipe 1 to ensure uniform heating. The inner side of the heating element is the heating surface, which directly contacts the cable terminal tail pipe 1 to transfer heat. The heating element can adopt an electric heating tube heating element, with the electric heating wire encapsulated in a stainless steel tube and filled with magnesium oxide inside, having high mechanical strength and corrosion resistance, and being able to meet the requirements of temperature stability and heating uniformity in the tin sealing process.

[0097] The thermoelectric cooler module 5 can perform segmented cooling on the cable terminal tail pipe 1 and its surrounding components after installation; the cooling module takes a high-efficiency semiconductor thermoelectric cooler as the core component and is supplemented by a fan heat dissipation device.

[0098] The time and temperature operation control panel 6 can set the heating time and heating temperature of the temperature control heating fixture 4, as well as the cooling time and cooling temperature of the thermoelectric cooler module 5;

[0099] The thermocouple sensor 7 can monitor the temperature data in real time and feedback the data to the time and temperature operation control panel 6 for temperature regulation;

[0100] The time and temperature operation control panel 6 includes an STM32 single-chip microcomputer, configured with an ADC module, setting the sampling frequency and resolution to accurately read the temperature signal of the thermocouple; initializing the PWM module to control the power output of the temperature control heating fixture 4 and the thermoelectric cooler module 5. Loading a multi-layer perceptron neural network model to optimize the PID control algorithm program into the single-chip microcomputer. The STM32 single-chip microcomputer is responsible for the underlying control of the time and temperature operation control panel 6, such as data acquisition, algorithm execution, and PWM output. The control panel serves as a human-machine interaction interface for users to input the set temperature and heating time, and display status such as real-time temperature and warning information.

[0101] The high-voltage cable tin sealing method includes:

[0102] Step 201, obtain the tin sealing process parameters associated with the tin sealing device.

[0103] In the embodiment of the present invention, the specific implementation process of step 201 is similar to step 101 and will not be repeated here.

[0104] It is worth mentioning that the tin sealing process parameters include the outer diameter of the cable metal sheath, the inner diameter of the tail pipe and the connection length of the tail pipe sheath. The following steps may also be included before step 202:

[0105] T1. According to the outer diameter of the cable metal sheath, the inner diameter of the tail tube and the connection length of the tail tube sheath, determine the amount of tin material 2 required for the tin sealing process, including:

[0106] The first square is obtained by square operation of the outer diameter of the cable metal sheath;

[0107] Performing a multiplication operation by using the first square and a preset pi parameter to obtain a first product value;

[0108] Take the tail pipe inner diameter and square it to get the second square;

[0109] Perform multiplication operation using the second square and a preset pi parameter to obtain a second product value;

[0110] Performing a difference operation using the first multiplication value and the second multiplication value to obtain a first difference value;

[0111] The first difference is multiplied by the connection length of the tail pipe sheath to obtain the amount of tin material 2 required for the tin sealing process, wherein the required amount of tin material 2 is the preset amount in step 202.

[0112] In a specific implementation, in order to facilitate the implementation of the method, the above process can be converted into a formula package form, wherein the amount of tin material 2 required for the tin sealing process can be as follows:

[0113]

[0114] In the formula, Indicates the amount of tin material 2 required for the tin sealing process, specifically the volume of the required tin solder. Indicates the connection length of the tail tube sheath, specifically the ideal connection length between the cable terminal tail tube 1 and the cable metal sheath. Indicates the preset pi parameter, Indicates the inner diameter of the tail pipe. Indicates the outer diameter of the cable metal sheath.

[0115] In the embodiment of the present invention, the required sealing tin amount is first calculated according to the outer diameter of the cable metal sheath, the inner diameter of the tail pipe and the connection length of the tail pipe sheath used at the construction site.

[0116] Step 202 , use a preset amount of tin material 2 to evenly apply the lower end of the cable terminal tail tube 1 of the tin sealing device, and use fireproof mud 3 to fill the lower end of the cable terminal tail tube 1.

[0117] In an embodiment of the present invention, the tin material 2 required for the tin sealing process is calculated by the above-mentioned step T1, and the tin material 2 is evenly applied to the inner wall of the cable terminal tail tube 1 and the cable metal sheath to be connected. It is required that the inner diameter of the cable terminal tail tube 1 after applying the tin material 2 is still larger than the outer diameter of the cable metal sheath. After the tail tube is installed in the original manner at the construction site, the gap at the connection of the tail tube mouth is sealed with an appropriate amount of fireproof mud 3. The fireproof mud 3 is used to seal the tin material 2 melted after heating in the cable terminal tail tube 1.

[0118] See also Figure 5 , Figure 5 The heating process diagram provided for the second embodiment of the present invention is as follows:

[0119] Step 203 : heating the cable terminal tail tube 1 based on preset PID control parameters, and obtaining a first real-time temperature of a tin molten pool formed after the tin material 2 in the cable terminal tail tube 1 is heated and melted.

[0120] In the embodiment of the present invention, the specific implementation process of step 203 is similar to step 103 and will not be repeated here.

[0121] It should be noted that the thermocouple sensors 7 are evenly and accurately arranged on the inner side of the cable terminal tail tube 1 at the tin sealing part to ensure that the temperature changes of the tin melt pool can be fully and accurately monitored. Subsequently, the temperature control heating fixture 4 is tightly and firmly fixed to the outer side of the tail tube, and the inner diameter of the fixture is adjusted to ensure good thermal contact and mechanical fixation between it and the tail tube, thereby ensuring the accuracy of temperature measurement and achieving uniformity and effectiveness of heating. The refrigeration plate module 5 is assembled with the insulation device, the temperature sensor is installed, and the control system and the power supply are connected. The tin melt pool is specifically located at the lower end of the cable terminal tail tube 1, above the position of the fireproof mud plugging, and the container space formed by the heated and melted tin solder in the cable terminal tail tube 1.

[0122] Step 204: When the first real-time temperature is less than a preset safety temperature threshold, determine whether a preset heating time condition is met.

[0123] In the embodiment of the present invention, the specific implementation process of step 204 is similar to step 104 and will not be repeated here.

[0124] See also Figure 6 , Figure 6 The cooling process diagram provided for the second embodiment of the present invention is as follows:

[0125] Step 205: If the preset heating time condition is met, the cable terminal tail pipe 1 is cooled in sections based on the preset PID control parameters until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud 3 at the lower end of the cable terminal tail pipe 1 is removed.

[0126] Further, step 205 may include the following sub-steps:

[0127] S11. If the preset heating time condition is met, the second real-time temperature of the molten tin pool is obtained, and the cable terminal tail pipe 1 is cooled in sections based on the updated PID control parameters until the cooling of all time periods is completed.

[0128] Furthermore, the tin sealing process parameters also include tin material thermal performance parameters, and S11 may include the following sub-steps:

[0129] S111. If the preset heating time condition is met, obtain the second real-time temperature of the molten tin pool.

[0130] The second real-time temperature refers to the real-time temperature of the tin molten pool after the current heating stage is completed.

[0131] In the embodiment of the present invention, if the preset heating time condition is met, it means that the heating stage is completed, and the second real-time temperature of the tin melting pool is obtained at this time.

[0132] S112, determining the total cooling time according to the second real-time temperature, the thermal performance parameter of the tin material and the ambient temperature.

[0133] The total cooling time refers to the time required for the tin seal to cool naturally after the heating stage is completed.

[0134] Furthermore, the thermal performance parameters of the tin material include the specific heat capacity of the tin material, the density of the tin material, the volume of the tin material, the convection heat transfer coefficient, the contact surface area and the thermal conductivity. S112 may include the following sub-steps:

[0135] S1121. Perform a difference calculation between the second real-time temperature and the ambient temperature to obtain a target difference.

[0136] S1122. Perform multiplication operation using the specific heat capacity, density, volume and target difference of the tin material to obtain a target multiplication value.

[0137] S1123. Perform multiplication operation on the convective heat transfer coefficient, the contact surface area and the target difference to obtain the convective heat transfer amount.

[0138] S1124. Multiply the thermal conductivity and the volume of the tin material to obtain the heat conduction amount.

[0139] S1125. Perform sum calculation on the convective heat transfer and the heat conduction to obtain a target sum.

[0140] S1126. Perform a ratio operation using the target multiplication value and the target sum value to obtain the total cooling time.

[0141] In a specific implementation, in order to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, where the total cooling time can be as follows:

[0142]

[0143] In the formula, Indicates the total cooling time, Indicates the specific heat capacity of tin material, specifically the specific heat capacity of tin material (J / (kg·K)), the heat required to increase or decrease the temperature of a unit mass of tin material by 1 degree Celsius. Indicates the density of tin material, specifically the density of tin material (kg / m 3 ), the mass of tin material per unit volume, Indicates the volume of tin material, that is, the preset amount calculated by the tin material dosage formula required for the tin sealing process (m 3 ), specifically the volume of the tin material, Indicates the second real-time temperature, Indicates the ambient temperature, represents the convective heat transfer coefficient, represents the contact surface area, represents thermal conductivity, Indicates the target difference, specifically the difference between the second real-time temperature of the tin material 2 and the ambient temperature, indicating the amount of heat that needs to be released. Represents the convective heat transfer, specifically the heat released by convective heat transfer, It represents the amount of heat conducted, specifically the amount of heat released by heat conduction.

[0144] In the embodiment of the present invention, the time required for the tin seal to cool naturally after the heating stage is completed is calculated based on the second real-time temperature, the thermal performance parameters of the tin material and the ambient temperature.

[0145] S113, performing a ratio operation between the total cooling time and the preset number of segments to obtain the time interval of each period.

[0146] In a specific implementation, in order to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, where the time interval can be as follows:

[0147]

[0148] In the formula, Indicates the time interval, Indicates the number of preset segments.

[0149] In the embodiment of the present invention, the total cooling time is evenly distributed to time periods and obtain the time interval of each time period.

[0150] S114, using the time interval of the first period, the second real-time temperature, the thermal performance parameters of the tin material and the ambient temperature to input a preset target cooling temperature function, and outputting the target cooling temperature of the first period.

[0151] The preset target cooling temperature function is specifically:

[0152]

[0153]

[0154]

[0155] In the formula, Represents the target cooling temperature, which changes dynamically over time. represents the cooling rate constant, which can be determined according to Newton's law of cooling, Indicates the cooling time.

[0156] In the embodiment of the present invention, the time interval of the first period, the second real-time temperature, the thermal performance parameters of the tin material and the ambient temperature are used to input a preset target cooling temperature function, and the target cooling temperature of the first period is output.

[0157] S115 , cooling the cable terminal tail tube 1 based on preset PID control parameters until the temperature of the tin melt pool reaches the target cooling temperature.

[0158] In the embodiment of the present invention, the cable terminal tail tube 1 is cooled in the first stage based on the preset PID control parameters until the temperature of the tin melt pool reaches the target cooling temperature of the first period, and the first stage of cooling is completed.

[0159] S116: Taking the target cooling temperature as the new second real-time temperature, traverse the time intervals of all time periods until the cooling of all time periods is completed.

[0160] In the embodiment of the present invention, the first stage of cooling is completed at this time, and the real-time temperature of the tin molten pool is the target cooling temperature of the first time period, and the target cooling temperature of the first time period is used as the new second real-time temperature. Combined with the time interval of the second time period, the thermal performance parameters of the tin material and the ambient temperature, the process jumps to the preset target cooling temperature function in step S114 for calculation to obtain the target cooling temperature of the second time period. Similarly, the target cooling temperatures of all time periods can be calculated according to the preset target cooling temperature function, and the cooling adjustment of the target cooling temperatures of all time periods can be completed to achieve smooth cooling.

[0161] S12, obtaining a third real-time temperature of the tin melting pool.

[0162] The third real-time temperature refers to the real-time temperature of the tin molten pool after completing a round of cooling in all periods.

[0163] In the embodiment of the present invention, the third real-time temperature of the molten tin pool is obtained. Under normal circumstances, the third real-time temperature at this time is equal to the target cooling temperature of the last period.

[0164] It is worth mentioning that when the third real-time temperature is not equal to the target cooling temperature of the last period, it indicates that the cooling efficiency may be insufficient due to the failure of the refrigeration plate module 5 to work properly, the measurement of the thermocouple sensor 7 may be inaccurate, the composition or state of the tin material 2 may change, resulting in the cooling characteristics not meeting expectations, etc. This is an abnormal situation, so the following steps may be included:

[0165] A1. When the third real-time temperature is not equal to the target cooling temperature of the last period, an early warning is issued.

[0166] S13: Compare the third real-time temperature with a preset cooling temperature threshold.

[0167] The preset cooling temperature threshold refers to a preset temperature value used to determine whether the cooling stage reaches the expected cooling temperature value. In the present invention, the preset cooling temperature threshold is preferably room temperature. Room temperature refers to the current ambient temperature when the tin sealing process is performed.

[0168] In the embodiment of the present invention, the third real-time temperature is compared with a preset cooling temperature threshold.

[0169] S14. When the third real-time temperature is less than or equal to the preset cooling temperature threshold, the fireproof mud 3 at the lower end of the cable terminal tail pipe 1 is removed.

[0170] In the embodiment of the present invention, when the third real-time temperature is less than or equal to the preset cooling temperature threshold, it means that the cooling is completed, and the fireproof mud 3 at the lower end of the cable terminal tail pipe 1 is removed. Figure 4 , Figure 4 This is a diagram showing the tin sealing effect of the tin sealing device provided in the second embodiment of the present invention.

[0171] S15. When the third real-time temperature is greater than the preset cooling temperature threshold, the third real-time temperature, the preset cooling temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to output updated PID control parameters.

[0172] In an embodiment of the present invention, when the third real-time temperature is greater than the preset cooling temperature threshold, the third real-time temperature, the preset cooling temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to readjust and output the PID control parameters of the new cooling stage.

[0173] S16. Based on the updated PID control parameters, jump to execute the step of cooling the cable terminal tail pipe 1 in sections based on the updated PID control parameters.

[0174] In an embodiment of the present invention, based on the updated PID control parameters, the step of segmented cooling of the cable terminal tail pipe 1 based on the updated PID control parameters is jumped to execute, and the new total cooling time is determined by using the third real-time temperature, the thermal performance parameters of the tin material and the ambient temperature, and then according to the new total cooling time, steps such as S113-S116 are executed until the temperature of the tin molten pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud 3 at the lower end pipe opening of the cable terminal tail pipe 1 is removed.

[0175] It should be noted that since the cooling rate of the tin material 2 is greater than 4°C / min, it will cause the solder joint to become brittle, and too slow cooling may cause grain coarsening. Therefore, after the heating is completed, according to the temperature monitoring results, it is necessary to rely on the single-chip computer to calculate the required cooling capacity through an algorithm, and issue a control command to adjust the working power of the cooling plate module 5. According to the set cooling rate, the temperature is slowly lowered to the preset cooling temperature threshold, and then the temperature control heating fixture 4 is removed, the cooling plate module 5 is removed, and the blocked organic fireproof mud 3 is removed.

[0176] Furthermore, the tin sealing process parameters also include the ambient temperature.

[0177] Step 206: When the first real-time temperature is greater than or equal to the preset safety temperature threshold, the first real-time temperature, the preset safety temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to output updated PID control parameters.

[0178] In an embodiment of the present invention, when the first real-time temperature is greater than or equal to the preset safety temperature threshold, the first real-time temperature, the preset safety temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to readjust and output the PID control parameters of the new heating stage.

[0179] Step 207 : Based on the updated PID control parameters, jump to execute the step of heating the cable terminal tail pipe 1 based on the preset PID control parameters.

[0180] In the embodiment of the present invention, based on the updated PID control parameters, the step of heating the cable terminal tail tube 1 based on the preset PID control parameters is jumped to heat the cable terminal tail tube 1 .

[0181] It is worth mentioning that see Figure 5 and Figure 6 , the multi-layer perceptron neural network model is generated through a preset model training process, which includes:

[0182] Real-time collection of temperature setting value, actual temperature and related parameters of the temperature control process, such as ambient temperature;

[0183] Preprocess the collected data, including denoising, normalization and other operations, to facilitate the subsequent training and use of neural networks, and obtain training data sets and test data sets;

[0184] Construct a neural network model with one input layer, one hidden layer, and one output layer to achieve automatic optimization of PID parameters;

[0185] The input layer contains two neurons, which receive temperature deviation and deviation change rate as input respectively;

[0186] Among them, the temperature deviation The specific calculation formula is:

[0187]

[0188] Deviation change rate The specific calculation formula is:

[0189]

[0190] In the formula, represents the sampling time interval, Indicates the temperature deviation at the last moment.

[0191] The hidden layer contains 5 neurons, and the activation function ReLU is used to increase the nonlinearity of the network. The neurons in the hidden layer receive the weighted sum of the output of the input layer and pass it to the output layer after processing by the activation function.

[0192] The output layer contains three neurons, corresponding to the three parameters of the PID controller (i.e. the STM32 microcontroller). The output layer neurons receive the weighted sum of the hidden layer outputs and directly output the optimized PID parameter values.

[0193] Input layer to hidden layer:

[0194]

[0195]

[0196] In the formula, represents the output of the input layer neurons, represents the weight from the input layer to the hidden layer, represents the hidden layer bias, represents the ReLU activation function, represents the net input of the hidden layer neurons, Represents the output of the hidden layer neurons.

[0197] Hidden layer to output layer:

[0198]

[0199] In the formula, represents the weight from the hidden layer to the output layer, represents the output of the hidden layer, represents the output layer bias, Represents the output of the output layer neurons, that is, the optimized PID parameters .

[0200] The sum of squared errors between the system output and the expected output is used as the loss function. The optimization algorithm such as Adam is used to calculate the gradient of the loss function with respect to the network weights and biases through the back-propagation algorithm, and the network parameters are updated to minimize the loss function.

[0201] It is worth mentioning that the weights and biases are optimized using the gradient descent method through the back-propagation algorithm to solve problems such as gradient disappearance and overfitting during MLP training.

[0202] The neural network is trained using a training data set containing system status information and expected outputs, and the network parameters are continuously optimized through iterative training. The performance of the trained network is evaluated on the test data set, and the PID parameters can effectively control the system temperature and have good adaptability and robustness.

[0203] The present invention realizes the precise control of the heating and cooling process of the cable terminal tail pipe 1 by obtaining the tin sealing process parameters and combining the preset PID control parameters, which can effectively avoid the problem of uneven melting or insufficient cooling of the tin material 2 caused by too high or too low temperature, thereby significantly improving the tin sealing quality and process stability, and solving the technical problem of how to improve the tin sealing quality and tin sealing process stability of high-voltage cables. At the same time, a segmented cooling strategy is adopted to decompose the cooling process into multiple smooth cooling paths, which effectively avoids the influence of temperature mutation on the solidification process of the tin material 2, not only significantly reducing the safety risks caused by temperature sudden changes during the construction process, but also simplifying the operation process, making the process easier to implement, and further improving the stability and reliability of the tin sealing process. In addition, the heating and cooling process is optimized based on the preset PID parameters, which greatly shortens the heating time, improves the tin sealing efficiency and reduces the construction cost. By real-time monitoring of the tin melting pool temperature and combining the preset threshold, the uniformity of the tin material 2 during the melting and cooling process is ensured, and the reliability of the connection between the high-voltage cable metal sheath and the terminal tail pipe is further enhanced, and the service life of the joint is extended. It is worth mentioning that the present invention does not require open flame operation and uses low-melting-point tin solder, which not only reduces environmental pollution but also reduces the health risks of operators, and provides an efficient, safe and reliable solution for tin sealing of high-voltage cable terminal joints.

[0204] See also Figure 7 , Figure 7 This is a structural block diagram of a high-voltage cable tin sealing system provided in Embodiment 3 of the present invention.

[0205] The present invention provides a high-voltage cable tin sealing system, comprising:

[0206] The parameter acquisition module 301 is used to acquire the tin sealing process parameters associated with the tin sealing device;

[0207] The tin material coating module 302 is used to evenly coat the lower end of the cable terminal tail tube 1 of the tin sealing device with a preset amount of tin material 2, and fill the lower end of the cable terminal tail tube 1 with fireproof mud 3;

[0208] The first data processing module 303 is used to heat the cable terminal tail tube 1 based on the preset PID control parameters, and obtain the first real-time temperature of the tin molten pool formed after the tin material 2 in the cable terminal tail tube 1 is heated and melted;

[0209] The second data processing module 304 is used to determine whether a preset heating time condition is met when the first real-time temperature is less than a preset safety temperature threshold;

[0210] The fireproof mud 3 removal module 305 is used to cool the cable terminal tail pipe 1 in sections based on the preset PID control parameters if the preset heating time condition is met, until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and then remove the fireproof mud 3 at the lower end of the cable terminal tail pipe 1.

[0211] Furthermore, the tin sealing process parameters also include the ambient temperature and:

[0212] A first updating module is used to input a pre-trained multi-layer perception neural network model using the first real-time temperature, the preset safety temperature threshold and the ambient temperature to output updated PID control parameters when the first real-time temperature is greater than or equal to the preset safety temperature threshold;

[0213] The heating jump module is used to jump to the step of heating the cable terminal tail pipe 1 based on the preset PID control parameters based on the updated PID control parameters.

[0214] Further, the fireproof mud 3 removal module 305 includes:

[0215] The segmented cooling submodule is used to obtain the second real-time temperature of the molten tin pool if the preset heating time condition is met, and to segmentally cool the cable terminal tail pipe 1 based on the updated PID control parameters until the cooling of all time periods is completed;

[0216] A third real-time temperature submodule, for obtaining a third real-time temperature of the tin molten pool;

[0217] A comparison submodule, used for comparing the third real-time temperature with a preset cooling temperature threshold;

[0218] The removal execution submodule is used to remove the fireproof mud 3 at the lower end of the cable terminal tail pipe 1 when the third real-time temperature is less than or equal to the preset cooling temperature threshold.

[0219] Furthermore, the tin sealing process parameters also include tin material thermal performance parameters, and the segmented cooling submodule includes:

[0220] A second real-time temperature unit is used to obtain a second real-time temperature of the tin molten pool if a preset heating time condition is met;

[0221] A total cooling time unit, used to determine the total cooling time according to the second real-time temperature, the thermal performance parameter of the tin material and the ambient temperature;

[0222] The time interval unit is used to calculate the ratio of the total cooling time to the preset number of segments to obtain the time interval of each period;

[0223] A preset target cooling temperature function unit is used to input a preset target cooling temperature function using the time interval of the first time period, the second real-time temperature, the thermal performance parameter of the tin material and the ambient temperature, and output a target cooling temperature of the first time period;

[0224] A cooling unit, used for cooling the cable terminal tail tube 1 based on preset PID control parameters until the temperature of the tin molten pool reaches a target cooling temperature;

[0225] The traversal unit is used to take the target cooling temperature as the new second real-time temperature and traverse the time intervals of all time periods until the cooling of all time periods is completed.

[0226] Furthermore, the fireproof mud 3 removal module 305 also includes:

[0227] A model output submodule, for, when the third real-time temperature is greater than a preset cooling temperature threshold, using the third real-time temperature, the preset cooling temperature threshold and the ambient temperature to input a pre-trained multi-layer perception neural network model, and outputting updated PID control parameters;

[0228] The cooling jump submodule is used to jump to the step of cooling the cable terminal tail pipe 1 in sections based on the updated PID control parameters based on the updated PID control parameters.

[0229] Furthermore, the thermal performance parameters of the tin material include the specific heat capacity of the tin material, the density of the tin material, the volume of the tin material, the convection heat transfer coefficient, the contact surface area and the thermal conductivity, and the total cooling time unit includes:

[0230] A target difference subunit is used to perform a difference operation between the second real-time temperature and the ambient temperature to obtain a target difference;

[0231] The target multiplication subunit is used to perform a multiplication operation using the specific heat capacity of the tin material, the density of the tin material, the volume of the tin material and the target difference to obtain a target multiplication value;

[0232] A convective heat transfer subunit is used to perform multiplication operation using the convective heat transfer coefficient, the contact surface area and the target difference value to obtain the convective heat transfer;

[0233] The heat conduction quantum unit is used to multiply the thermal conductivity and the volume of the tin material to obtain the heat conduction amount;

[0234] A target sum subunit is used to perform sum operation using the convective heat transfer and the heat conduction to obtain a target sum;

[0235] The ratio operation subunit is used to perform a ratio operation using the target multiplication value and the target sum value to obtain the total cooling time.

[0236] The present invention realizes the precise control of the heating and cooling process of the cable terminal tail pipe 1 by obtaining the tin sealing process parameters and combining the preset PID control parameters, which can effectively avoid the problem of uneven melting or insufficient cooling of the tin material 2 caused by too high or too low temperature, thereby significantly improving the tin sealing quality and process stability, and solving the technical problem of how to improve the tin sealing quality and tin sealing process stability of high-voltage cables. At the same time, a segmented cooling strategy is adopted to decompose the cooling process into multiple smooth cooling paths, which effectively avoids the influence of temperature mutation on the solidification process of the tin material 2, not only significantly reducing the safety risks caused by temperature sudden changes during the construction process, but also simplifying the operation process, making the process easier to implement, and further improving the stability and reliability of the tin sealing process. In addition, the heating and cooling process is optimized based on the preset PID parameters, which greatly shortens the heating time, improves the tin sealing efficiency and reduces the construction cost. By real-time monitoring of the tin melting pool temperature and combining the preset threshold, the uniformity of the tin material 2 during the melting and cooling process is ensured, and the reliability of the connection between the high-voltage cable metal sheath and the terminal tail pipe is further enhanced, and the service life of the joint is extended. It is worth mentioning that the present invention does not require open flame operation and uses low-melting-point tin solder, which not only reduces environmental pollution but also reduces the health risks of operators, and provides an efficient, safe and reliable solution for tin sealing of high-voltage cable terminal joints.

[0237] See also Figure 8 , Figure 8 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention.

[0238] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402, wherein the memory 401 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes a high-voltage cable tin sealing method according to any of the above embodiments.

[0239] The memory 401 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for a program code 413 for executing any method step in the above method. For example, the storage space 403 for the program code may include individual program codes 413 for implementing the various steps in the above method, respectively. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program code may be compressed, for example, in an appropriate form. When these codes are run by a computing and processing device, the computing and processing device performs the various steps in the method described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program code may be compressed, for example, in an appropriate form. When these codes are executed by a computing and processing device, the computing and processing device is caused to execute each step of the high-voltage cable tin sealing method described above.

[0240] Embodiment 5 of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the high-voltage cable tin sealing method as described in any of the above embodiments is implemented.

[0241] Embodiment 6 of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes a high-voltage cable tinning method as described in any of the above embodiments.

[0242] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0243] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0244] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0245] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0246] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0247] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for tinning a high voltage cable, characterized in that: Applied to the tin sealing device, the method comprises: Acquire the tin sealing process parameters associated with the tin sealing device; A preset amount of tin material is used to evenly smear the lower end of the cable terminal tail pipe of the tin sealing device, and a fireproof mud is used to fill the lower end of the cable terminal tail pipe. The cable terminal tail tube is heated based on preset PID control parameters, and a first real-time temperature of a tin molten pool formed after the tin material in the cable terminal tail tube is heated and melted is obtained; When the first real-time temperature is lower than the preset safety temperature threshold, determining whether a preset heating time condition is met; If the preset heating time condition is met, the cable terminal tail pipe is cooled in sections based on the preset PID control parameters until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud at the lower end of the cable terminal tail pipe is removed.

2. The high voltage cable tin sealing method according to claim 1, characterized in that: The tin sealing process parameters also include the ambient temperature and: When the first real-time temperature is greater than or equal to a preset safety temperature threshold, the first real-time temperature, the preset safety temperature threshold and the ambient temperature are input into a pre-trained multi-layer perception neural network model to output updated PID control parameters; Based on the updated PID control parameters, the step of heating the cable terminal tail pipe based on the preset PID control parameters is skipped and executed.

3. The high voltage cable tin sealing method according to claim 2, characterized in that: If the preset heating time condition is met, the cable terminal tail pipe is cooled in sections based on the preset PID control parameters until the temperature of the tin molten pool is less than or equal to the preset cooling temperature threshold, and the fireproof mud at the lower end of the cable terminal tail pipe is removed, including: If the preset heating time condition is met, the second real-time temperature of the molten tin pool is obtained, and the cable terminal tail pipe is cooled in sections based on the updated PID control parameters until the cooling of all time periods is completed; Obtaining a third real-time temperature of the tin molten pool; comparing the third real-time temperature with a preset cooling temperature threshold; When the third real-time temperature is less than or equal to the preset cooling temperature threshold, the fireproof mud at the lower end of the cable terminal tail pipe is removed.

4. The high voltage cable tin sealing method according to claim 3, characterized in that: The tin sealing process parameters also include tin material thermal performance parameters. If the preset heating time condition is met, the second real-time temperature of the tin molten pool is obtained, and the cable terminal tail tube is cooled in sections based on the updated PID control parameters until the cooling of all time periods is completed, including: If the preset heating time condition is met, obtaining a second real-time temperature of the molten tin pool; Determining a total cooling time according to the second real-time temperature, the tin material thermal performance parameter and the ambient temperature; The total cooling time is calculated by ratioing the total cooling time with the preset number of segments to obtain the time interval of each period; Using the time interval of the first time period, the second real-time temperature, the thermal performance parameter of the tin material and the ambient temperature to input a preset target cooling temperature function, outputting the target cooling temperature of the first time period; Cooling the cable terminal tail tube based on the preset PID control parameters until the temperature of the tin molten pool reaches the target cooling temperature; The target cooling temperature is used as a new second real-time temperature, and the time intervals of all time periods are traversed until the cooling of all time periods is completed.

5. The high voltage cable tin sealing method according to claim 3, characterized in that: Also includes: When the third real-time temperature is greater than the preset cooling temperature threshold, the third real-time temperature, the preset cooling temperature threshold and the ambient temperature are input into a pre-trained multi-layer perceptron neural network model to output updated PID control parameters; Based on the updated PID control parameters, the step of cooling the cable terminal tail pipe in sections based on the updated PID control parameters is skipped and executed.

6. The high voltage cable tin sealing method according to claim 4, characterized in that: The thermal performance parameters of the tin material include specific heat capacity, density, volume, convection heat transfer coefficient, contact surface area and thermal conductivity of the tin material. The total cooling time is determined according to the second real-time temperature, the thermal performance parameters of the tin material and the ambient temperature, including: Performing a difference operation between the second real-time temperature and the ambient temperature to obtain a target difference; Performing a multiplication operation using the specific heat capacity of the tin material, the density of the tin material, the volume of the tin material, and the target difference to obtain a target multiplication value; The convective heat transfer coefficient, the contact surface area and the target difference are used to perform a multiplication operation to obtain a convective heat transfer amount; The thermal conductivity is multiplied by the volume of the tin material to obtain the thermal conduction amount; Performing a sum operation using the convective heat transfer amount and the heat conduction amount to obtain a target sum value; The target multiplication value and the target sum value are used to perform a ratio operation to obtain the total cooling time.

7. A high-voltage cable tin-sealing system, based on the high-voltage cable tin-sealing method according to any one of claims 1 to 6, characterized in that: Applicable to the tin sealing device, comprising: A parameter acquisition module, used to acquire the tin sealing process parameters associated with the tin sealing device; A tin coating module is used to evenly coat the lower end of the cable terminal tail tube of the tin sealing device with a preset amount of tin, and fill the lower end of the cable terminal tail tube with fireproof mud; A first data processing module is used to heat the cable terminal tail tube based on preset PID control parameters, and obtain a first real-time temperature of a tin molten pool formed after the tin material in the cable terminal tail tube is heated and melted; A second data processing module, configured to determine whether a preset heating time condition is met when the first real-time temperature is lower than the preset safety temperature threshold; The fireproof mud removal module is used to cool the cable terminal tail pipe in sections based on the preset PID control parameters if the preset heating time condition is met, until the temperature of the tin melt pool is less than or equal to the preset cooling temperature threshold, and then remove the fireproof mud at the lower end of the cable terminal tail pipe.

8. An electronic device, characterized in that: It comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the high-voltage cable tin sealing method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the high-voltage cable tin sealing method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the high-voltage cable tinning method according to any one of claims 1 to 6.

Images