Through-wall welding oil temperature control method

Abstract

The invention provides a through-wall welding oil temperature control method, which belongs to the technical field of storage battery manufacturing, and comprises the following steps: configuring a circulating pipeline for connecting a low-temperature medium generated by refrigeration equipment into an oil tank of a through-wall welding machine, and adjusting the temperature and flow of the low-temperature medium to control the temperature of through-wall welding hydraulic oil; an oil inlet of the filter is connected with the bottom of the oil tank, and an oil return opening of the filter is connected with the upper part of the oil tank; impurities in hydraulic oil in the oil tank are removed by the filter; and the refrigeration equipment and the filter are started, the oil temperature of the hydraulic oil is controlled, the cleanliness of the hydraulic oil is kept, and the consistency of the through-wall welding quality is guaranteed. According to the through-wall welding oil temperature control method, by means of double guarantee of temperature control and impurity removal, the temperature fluctuation range of the hydraulic oil is stabilized within a certain range, impurities in the oil liquid are also smoothly removed, the pressure fluctuation amplitude of a hydraulic system is greatly reduced, and the service life of the hydraulic system is prolonged. And the stability of the output pressure of the welding electrode and the consistency of the welding spot penetration depth are effectively improved.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing technology, and more specifically, relates to a method for controlling the oil temperature during through-wall welding. Background Technology

[0002] Through-wall welding is a crucial process in the production of flooded lead-acid batteries, enabling the internal connection of the electrode groups. Its welding quality directly determines the battery's electrical performance, cycle life, and safety. The core principle of this process is to use a hydraulic system to drive the welding electrodes, fusing the battery casing wall and the terminal posts at high temperatures to form a stable conductive path. The hydraulic oil, as the power transmission medium of the hydraulic system, has its temperature stability and cleanliness as key factors affecting welding quality. When the oil temperature is too high, the viscosity of the hydraulic oil decreases, leading to increased pressure loss in the hydraulic system, fluctuations in the output pressure of the welding electrodes, and a tendency for "over-welding." When the oil temperature is too low, the viscosity of the hydraulic oil increases, its fluidity deteriorates, hydraulic pump wear intensifies, electrode movement response sluggish, and a tendency for "false welding" (incomplete fusion of the weld joint) occurs. Simultaneously, impurities in the oil (metal shavings, dust, sludge, etc.) can wear down hydraulic components and jam hydraulic valves, further exacerbating oil temperature fluctuations and pressure runaway, ultimately leading to serious problems such as battery short circuits and abnormal internal resistance. Therefore, it is difficult to produce lead-acid batteries that meet high-precision requirements. Summary of the Invention

[0003] The purpose of this application is to provide a method for controlling the oil temperature during through-wall welding, in order to solve the technical problem in the prior art where the oil temperature fluctuates greatly and the oil contains impurities, making it difficult for the quality of the battery to meet high precision requirements when using through-wall welding in the battery manufacturing process.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a method for controlling the oil temperature during through-wall welding, comprising: S1: Configure the low-temperature medium generated by the refrigeration equipment to enter the circulation pipeline of the through-wall welding machine oil tank, and adjust the temperature and flow rate of the low-temperature medium to control the temperature of the through-wall welding hydraulic oil; S2: Configure a filter to be connected to the oil tank. The oil inlet of the filter is connected to the bottom of the oil tank, and the oil return port is connected to the top of the oil tank. The filter is used to remove impurities from the hydraulic oil in the oil tank. S3: Start the refrigeration equipment and the filter to control the oil temperature of the hydraulic oil and maintain its cleanliness, thereby ensuring the consistency of the through-wall welding quality.

[0005] In one possible implementation, the refrigeration equipment is an air-cooled chiller, which is equipped with a control panel to adjust the temperature and flow rate of the low-temperature medium.

[0006] In one possible implementation, both the air-cooled chiller and the filter are equipped with hoses connected to the oil tank.

[0007] In one possible implementation, in step S1, detection points A and B for oil temperature detection are set inside the oil tank. Detection point A is the high-temperature zone near the hydraulic pump, and detection point B is the normal-temperature zone far from the hydraulic pump. The temperature of each point is collected every 5 seconds, and the gradient difference ΔT is calculated. AB =T A -T B A hydraulic oil oxidation sensor is installed inside the oil tank to detect the hydraulic oil aging degree K. When K ≥ 1.5, it is determined that the oil aging has caused an increase in viscosity, requiring an additional reduction in the circulating water temperature; based on ΔT AB Determine the dynamic compensation amount with K, if ΔT AB If K > 2℃, lower the circulating water temperature by 0.8-1.2℃; if K ≥ 1.5, lower it by an additional 0.5-0.8℃.

[0008] In one possible implementation, a detection point C for oil temperature monitoring is set inside the oil tank. Detection point C is located in the heat exchange zone near the circulating water pipe, and the heat exchange temperature difference ΔT is calculated. AC =T A -T C If ΔT AC If the temperature is greater than 3℃, then lower it by an additional 0.5-0.7℃.

[0009] In one possible implementation, in S2, an online impurity property detector is installed at the oil inlet of the filter to identify the metallic / non-metallic properties and particle size distribution of the impurities. If the proportion of metallic impurities is >60% and the particle size is ≥30μm, the first filtration mode is activated, the flow rate of the primary metal mesh filter element is increased to 15L / min, the filtration time is extended to 15 minutes, the flow rate of the intermediate and advanced filter elements is maintained at 10L / min, and the primary filter element is back-purged once every 5 minutes. If the proportion of non-metallic impurities is >60% and the particle size is ≤10μm, the second filtration mode is activated, the intermediate glass fiber filter element and the advanced ceramic filter element are used, and an oil sludge adsorption membrane is installed at the outlet of the advanced ceramic filter element.

[0010] In one possible implementation, a contamination sensor is built into each stage of the filter element to monitor the amount of impurities S accumulated inside the filter element in real time. The remaining life coefficient λ = (S0-S) / S0 is calculated in combination with the rated dirt holding capacity S0 of the filter element. When λ < 0.3, a filter element warning is issued. At the same time, the remaining service life is predicted based on the growth rate of S in the last 3 filtrations. If the pressure difference of the primary filter element is ≥ 0.25MPa within the predicted life, it is automatically determined to be abnormal wear, filtration is suspended and the monitoring process is triggered.

[0011] In one possible implementation, impurity sensors, viscosity sensors, moisture sensors, and backup sensors are installed at the top, middle, and bottom of the oil tank. After averaging the data from each group, the data is compared with the data from adjacent areas for deviation verification. If the deviation of the sensor data in a certain area from the average value exceeds a threshold, a data validity judgment is initiated. If the deviation persists after five consecutive data collections, the sensor is determined to be faulty, the system automatically switches to the backup sensor, and a sensor maintenance reminder is issued.

[0012] In one possible implementation, a paraffin-based phase change energy storage module is embedded in a cryogenic medium storage tank. When the temperature of the cryogenic medium rises above the upper threshold, the paraffin-based phase change energy storage module undergoes a phase change to absorb heat; when the temperature of the cryogenic medium drops below the lower threshold, the paraffin-based phase change energy storage module undergoes a phase change to release heat.

[0013] In one possible implementation, weld penetration and tensile strength data are obtained through an online weld detection system. If the fluctuation amplitude of the penetration or the decrease in tensile strength is greater than the set value, the operating parameters of the filter and the oil impurity content data are automatically retrieved. If the filtration effect is deemed insufficient, the filtration accuracy is increased and the filtration time is extended. If the filter element is deemed saturated, the filter element replacement process is initiated.

[0014] The beneficial effects of the through-wall welding oil temperature control method provided in this application are as follows: Compared with the prior art, the through-wall welding oil temperature control method of this application, during operation, connects the low-temperature medium (circulating water) generated by the refrigeration equipment to the pre-set closed-loop circulation pipeline in the oil tank of the through-wall welding machine. At the same time, the filter is connected to the oil tank through an oil-resistant hose, following the principle of bottom oil inlet and top oil return. The bottom of the oil tank is the main deposition area for impurities such as metal shavings and dust. The oil inlet is located here to efficiently suck up the deposited impurities, and the oil return port is located at the top to avoid the clean oil after filtration impacting the liquid surface and causing scum to mix in. After the equipment is connected, the parameter debugging stage begins. The temperature of the low-temperature medium output by the refrigeration equipment is adjusted according to the optimal working temperature of the hydraulic oil. The initial temperature is set and the flow rate of the low-temperature medium is adjusted through the flow regulating valve to ensure heat exchange efficiency and system stability. The integrity of the filter element of the filter needs to be checked in advance. After completing the preparations, the refrigeration equipment and filter are started simultaneously. The refrigeration equipment dynamically adjusts the temperature and flow rate of the low-temperature medium by monitoring the oil temperature in real time. When the oil temperature is higher than the threshold range, the medium temperature is reduced and the flow rate is increased to accelerate heat dissipation and avoid electrode pressure fluctuations caused by a decrease in oil viscosity, thus preventing over-soldering. When the oil temperature is lower than the threshold range, the medium temperature is increased or the flow rate is reduced to avoid hydraulic pump wear and electrode response lag caused by increased oil viscosity, thereby reducing the risk of incomplete soldering. The filter draws in impurity-laden oil through the bottom inlet, filters it through the filter element, and sends the clean oil back to the oil tank through the top return port. This continuously removes metal wear particles, environmental dust, and oxidized sludge from the hydraulic oil, preventing impurities from clogging hydraulic valves or aggravating component wear, and avoiding abnormal oil temperature fluctuations and pressure loss caused by impurities.

[0015] In this way, with the dual protection of temperature control and impurity removal, the hydraulic oil temperature fluctuation range is stabilized within a certain range, impurities in the oil are also successfully removed, the pressure fluctuation amplitude of the hydraulic system is greatly reduced, effectively improving the stability of the welding electrode output pressure and the consistency of the weld penetration, increasing the welding qualification rate of through-wall welding, and reducing the battery short-circuit failure rate, so as to enable lead-acid batteries to meet high-standard production requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A connection diagram of the through-wall welding machine, filter, refrigeration equipment, and oil tank provided in the embodiments of this application. Figure 1 ; Figure 2 A connection diagram of the through-wall welding machine, filter, refrigeration equipment, and oil tank provided in the embodiments of this application. Figure 2 .

[0018] The following are the labeling elements in the figure: 10. Through-wall welding machine; 20. Oil tank; 30. Filter; 40. Hoses; 50. Refrigeration equipment; 60. Control panel. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Please see Figure 1 and Figure 2 The method for controlling the oil temperature of through-wall welding provided in this application is described below. A method for controlling the oil temperature of through-wall welding includes: S1: A low-temperature medium generated by a refrigeration device 50 is connected to the circulation pipe of the oil tank 20 of the through-wall welding machine 10; the temperature and flow rate of the low-temperature medium are adjusted to control the temperature of the hydraulic oil used in through-wall welding; S2: A filter 30 is connected to the oil tank 20, with its inlet connected to the bottom of the oil tank 20 and its outlet connected to the top of the oil tank 20; the filter 30 is used to remove impurities from the hydraulic oil in the oil tank 20; S3: The refrigeration device 50 and the filter 30 are started to control the oil temperature and maintain the cleanliness of the hydraulic oil, thereby ensuring the consistency of the welding quality of the through-wall welding.

[0024] Compared with existing technologies, the through-wall welding oil temperature control method provided in this application involves connecting the low-temperature medium (circulating water) generated by the refrigeration equipment 50 to a pre-set closed-loop circulation pipeline within the oil tank 20 of the through-wall welding machine 10. Simultaneously, the filter 30 is connected to the oil tank 20 via an oil-resistant hose 40, following the principle of bottom inlet and top return. The bottom of the oil tank 20 is the main deposition area for metal shavings, dust, and other impurities; placing the inlet here efficiently draws in these deposited impurities, while the top return port prevents the filtered clean oil from impacting the liquid surface and causing scum to mix in. After the equipment connection is completed, the parameter debugging stage begins. The temperature of the low-temperature medium output by the refrigeration equipment 50 is adjusted according to the optimal operating temperature of the hydraulic oil. An initial temperature is set, and the flow rate of the low-temperature medium is adjusted via a flow regulating valve to ensure heat exchange efficiency and system stability. The integrity of the filter element in the filter 30 must be checked beforehand. After completing the preparation work, the refrigeration equipment 50 and the filter 30 are started simultaneously. The refrigeration equipment 50 dynamically adjusts the temperature and flow rate of the low-temperature medium by monitoring the oil temperature in real time. When the oil temperature is higher than the threshold range, the medium temperature is reduced and the flow rate is increased to accelerate heat dissipation and avoid electrode pressure fluctuations caused by the decrease in oil viscosity, thus preventing over-welding. When the oil temperature is lower than the threshold range, the medium temperature is increased or the flow rate is reduced to avoid hydraulic pump wear and electrode response lag caused by increased oil viscosity, thereby reducing the risk of false welding. The filter 30 draws in impurity oil through the bottom inlet, filters it through the filter element, and sends the clean oil back to the oil tank 20 through the top return port. It continuously removes metal wear particles, environmental dust, and oxidized sludge from the hydraulic oil, preventing impurities from jamming the hydraulic valves or aggravating component wear, and avoiding abnormal oil temperature fluctuations and pressure loss caused by impurities.

[0025] In this way, with the dual protection of temperature control and impurity removal, the hydraulic oil temperature fluctuation range is stabilized within a certain range, impurities in the oil are also successfully removed, the pressure fluctuation amplitude of the hydraulic system is greatly reduced, effectively improving the stability of the welding electrode output pressure and the consistency of the weld penetration, increasing the welding qualification rate of through-wall welding, and reducing the battery short-circuit failure rate, so as to enable lead-acid batteries to meet high-standard production requirements.

[0026] The circulating pipeline is preferably made of 304 stainless steel and laid in a spiral pattern. Heat dissipation fins are added to the pipe body to increase the heat exchange area and ensure that the low-temperature medium can fully contact the hydraulic oil. For the filter 30, the integrity of the filter element must be checked in advance, and a graded filtration structure including primary, intermediate, and high-grade filters should be selected to ensure effective impurity removal. The filter operates intermittently throughout the welding process, starting every 2 hours for 30 minutes each time.

[0027] Please see Figure 1 and Figure 2As a specific implementation of the through-wall welding oil temperature control method provided in this application, the refrigeration equipment 50 is an air-cooled chiller, which is equipped with a control panel 60. The temperature and flow rate of the low-temperature medium are adjusted through the control panel 60. An air-cooled chiller suitable for the workshop environment is selected as the refrigeration equipment 50, and its built-in control panel 60 enables centralized adjustment of the low-temperature medium temperature and flow rate. During operation, the chiller is first connected to the circulation pipe of the oil tank 20. The medium temperature is preset to 22-25℃ and the flow rate to 15-20L / min through the panel, and can be finely adjusted in real time during welding. This simplifies operation, improves temperature control accuracy, stabilizes hydraulic oil viscosity, avoids over-welding / insufficient welding, and reduces manual adjustment errors, further ensuring consistent welding quality.

[0028] Please see Figure 1 and Figure 2 As a specific implementation of the through-wall welding oil temperature control method provided in this application, both the air-cooled chiller and the filter are equipped with flexible hoses 40 connected to the oil tank 20. Temperature-resistant and oil-resistant flexible hoses 40 are selected and are used to connect the air-cooled chiller to the circulation pipes of the oil tank 20, and the filter to the inlet and outlet of the oil tank 20, respectively. During operation, the hoses 40 are connected according to the interface matching, and the hoses 40 are fixed after allowing for expansion and contraction. The flexible hoses 40 provide flexible connections to adapt to the workshop layout, are easy to disassemble and maintain, can absorb equipment vibration, prevent oil leakage, ensure stable temperature control and impurity removal, and contribute to improved welding quality.

[0029] Please see Figure 1 and Figure 2 As a specific implementation of the through-wall welding oil temperature control method provided in this application, in S1, detection points A and B for oil temperature detection are set in the oil tank. Detection point A is the high-temperature zone near the hydraulic pump, and detection point B is the normal-temperature zone far from the hydraulic pump. The temperature of each point is collected every 5 seconds, and the gradient difference ΔT is calculated. AB =T A -T B A hydraulic oil oxidation sensor is installed inside the oil tank to detect the hydraulic oil aging degree K. When K ≥ 1.5, it is determined that the oil aging has caused an increase in viscosity, requiring an additional reduction in the circulating water temperature; based on ΔT AB Determine the dynamic compensation amount with K, if ΔT AB If K > 2℃, lower the circulating water temperature by 0.8-1.2℃; if K ≥ 1.5, lower it by an additional 0.5-0.8℃. Dynamic compensation of the circulating water temperature is achieved through dual-point temperature difference monitoring linked to oil aging. During operation, detection points and sensors are precisely positioned within the oil tank. Detection point A is located in the high-temperature zone near the hydraulic pump, and detection point B is located in the normal-temperature zone away from the hydraulic pump. An oil oxidation sensor is also included. The equipment is calibrated before welding to ensure data accuracy. During welding, T is collected every 5 seconds. A T BAnd oxidation degree data, calculate temperature difference ΔT AB And aging degree K (current acid value / initial acid value). If ΔT AB If K > 2℃, it indicates insufficient heat dissipation in the high-temperature zone. The circulating water temperature should be lowered by 0.8-1.2℃ to balance the temperature in the equilibrium zone. If K ≥ 1.5, it indicates that oil aging has led to increased viscosity. An additional 0.5-0.8℃ cooling should be applied to offset the impact of abnormal viscosity on the hydraulic system. This method accurately captures differences in oil temperature distribution and changes in oil performance, reducing hydraulic oil temperature fluctuations from ±1.5℃ to ±0.8℃, viscosity fluctuations to ≤ ±3%, and hydraulic system pressure fluctuations to ±1.5MPa. This effectively avoids over-welding and incomplete welding problems caused by localized high temperatures or oil aging.

[0030] Please see Figure 1 and Figure 2 As a specific embodiment of the through-wall welding oil temperature control method provided in this application, a detection point C for oil temperature detection is set in the oil tank. Detection point C is the heat exchange zone near the circulating water pipe, and the heat exchange temperature difference ΔT is calculated. AC =T A -T C If ΔT AC If the temperature exceeds 3℃, further reduce the temperature by 0.5-0.7℃. By adding a detection point C in the heat exchange zone, the inadequacy of monitoring only the temperature difference within the area is compensated for, allowing for accurate determination of heat exchange efficiency. During operation, detection point C is placed near the circulating water pipe, and its temperature is collected every 5 seconds synchronously with points A and B to calculate ΔT. AC =T A -T C If this value is greater than 3℃, it indicates insufficient heat exchange, and the circulating water temperature should be further reduced by 0.5-0.7℃. This shortens the temperature control lag, further reduces oil temperature fluctuations to ±0.5℃, improves heat exchange efficiency, avoids welding defects caused by localized high temperatures, and further ensures consistent welding quality.

[0031] Please see Figure 1 and Figure 2As a specific implementation of the through-wall welding oil temperature control method provided in this application, in step S2, an online impurity property detector is installed at the oil inlet of the filter to identify the metallic / non-metallic properties and particle size distribution of the impurities. If the proportion of metallic impurities is >60% and the particle size is ≥30μm, the first filtration mode is activated, the flow rate of the primary metal mesh filter element is increased to 15L / min, the filtration time is extended to 15 minutes, the flow rate of the intermediate and advanced filter elements is maintained at 10L / min, and the primary filter element is back-purged once every 5 minutes. If the proportion of non-metallic impurities is >60% and the particle size is ≤10μm, the second filtration mode is activated, the intermediate glass fiber filter element and the advanced ceramic filter element are used, and an oil sludge adsorption membrane is installed at the outlet of the advanced ceramic filter element. By online identification of impurity properties and particle size, the filtration strategy is adaptively switched to improve the accuracy of impurity removal. During operation, an online impurity property detector is first installed at the oil inlet of the filter. Using laser scattering and conductivity detection technology, the metallic / non-metallic properties and particle size distribution of impurities are identified in real time. The detector is calibrated before welding to ensure data accuracy. Impurity data is collected simultaneously during welding. If the proportion of metallic impurities is >60% and the particle size is ≥30μm, the first filtration mode is immediately activated. The flow rate of the primary metal mesh filter element is increased to 15L / min and the filtration time is extended to 15 minutes. The flow rate of the intermediate and advanced filters is kept constant at 10L / min. The primary filter element is back-blown with high-pressure air every 5 minutes to quickly remove large-diameter metal wear particles. If the proportion of non-metallic impurities is >60% and the particle size is ≤10μm, the second filtration mode is switched to, skipping the primary filter element and directly using the intermediate glass fiber filter element and the advanced ceramic filter element. At the same time, an oil sludge adsorption membrane is installed at the outlet of the advanced filter element to enhance the capture of fine dust and oil sludge. This method significantly improves the removal rates of both metallic and non-metallic impurities, avoiding energy waste caused by excessive filtration and addressing the impact of different types of impurities on welding quality, thereby further ensuring the consistency of through-wall welding.

[0032] Please see Figure 1 and Figure 2As a specific implementation of the through-wall welding oil temperature control method provided in this application, a contamination sensor is built into each stage of the filter element to monitor the amount of impurities S accumulated inside the filter element in real time. The remaining life coefficient λ = (S0 - S) / S0 is calculated based on the rated dirt holding capacity S0 of the filter element. When λ < 0.3, a filter element warning is issued. Simultaneously, based on the S growth rate of the last three filtrations, the remaining service life is predicted. If the pressure difference of the primary filter element is ≥ 0.25 MPa within the predicted lifespan, it is automatically determined to be abnormal wear, filtration is suspended, and a monitoring process is triggered. Precise control of the filter element status is achieved through built-in sensors. During operation, contamination sensors are installed in the primary, intermediate, and advanced filter elements to monitor the amount of impurities S accumulated in real time. The remaining life coefficient λ is calculated based on the rated dirt holding capacity S0. When λ < 0.3, a warning is issued, and the remaining service life is predicted based on the S growth rate of the last three filtrations, facilitating early replacement. If the pressure difference of the primary filter element is ≥ 0.25 MPa within the predicted lifespan, it is automatically determined to be abnormal wear of the hydraulic system, filtration is suspended, and pump and valve group detection is triggered. This approach avoids overuse or untimely replacement of filter elements, maintains stable oil cleanliness at NAS 6 level, reduces production downtime, can quickly detect abnormal wear, lower equipment maintenance costs, and extend the service life of the hydraulic system.

[0033] Please see Figure 1 and Figure 2 As a specific implementation of the through-wall welding oil temperature control method provided in this application, impurity sensors, viscosity sensors, moisture sensors, and backup sensors are installed at the top, middle, and bottom of the oil tank. After averaging the data from each group, a deviation check is performed with data from adjacent areas. If the deviation of the sensor data in a certain area from the average value exceeds a threshold, a data validity judgment is initiated. Data is collected continuously for 5 times. If the deviation persists, the sensor is determined to be faulty, and the system automatically switches to the backup sensor and issues a sensor maintenance reminder. This multi-area layout and backup switching ensure reliable detection. During operation, impurity, viscosity, and moisture sensors, along with backup components, are deployed at the top, middle, and bottom of the oil tank. Data is collected in real time during welding, and the average value is calculated and checked against the data from each area. If the deviation of the data in a certain area from the average value exceeds a threshold, and the deviation remains abnormal after 5 consecutive collections, the sensor is determined to be faulty, and the system automatically switches to the backup sensor and issues a maintenance reminder. This significantly reduces the error in oil parameter detection, avoids erroneous adjustments based on incorrect data, ensures accurate temperature control and impurity removal, reduces production interruptions, and improves equipment operational stability and welding quality.

[0034] Please see Figure 1 and Figure 2As a specific embodiment of the through-wall welding oil temperature control method provided in this application, a paraffin-based phase change energy storage module is embedded in a cryogenic medium storage tank. When the cryogenic medium temperature rises above the upper threshold, the paraffin-based phase change energy storage module undergoes a phase change to absorb heat; when the cryogenic medium temperature drops below the lower threshold, the paraffin-based phase change energy storage module undergoes a phase change to release heat. During operation, a suitable paraffin-based phase change energy storage module is embedded in the cryogenic medium storage tank, with a preset temperature threshold of 20-25℃. When the medium temperature exceeds the upper limit, the module absorbs heat during phase change to suppress the temperature rise; when it falls below the lower limit, the module releases heat during phase change to prevent the temperature from dropping. This reduces the fluctuation range of the medium temperature, shortens the temperature control lag, reduces the energy consumption of starting and stopping the refrigeration equipment, stabilizes the viscosity of the hydraulic oil, and avoids welding defects caused by medium fluctuations.

[0035] Please see Figure 1 and Figure 2 As a specific implementation of the through-wall welding oil temperature control method provided in this application, the online weld joint detection system is activated during operation to collect real-time data on weld joint penetration depth and tensile strength, with preset thresholds for penetration depth fluctuation and tensile strength decrease. When the data exceeds the thresholds, the system automatically retrieves the operating parameters of the filter and the oil impurity content data. If the filtration effect is deemed insufficient, the filtration accuracy is immediately increased and the filtration time is extended. If the filter element is saturated, the filter element replacement process is initiated. This approach enables rapid location and targeted handling of welding quality anomalies, avoids the generation of batches of defective products, reduces manual inspection time, further stabilizes the hydraulic oil condition and welding quality, and improves the welding pass rate.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for controlling the oil temperature during through-wall welding, characterized in that, include: S1: Configure the low-temperature medium generated by the refrigeration equipment to enter the circulation pipeline of the through-wall welding machine oil tank, and adjust the temperature and flow rate of the low-temperature medium to control the temperature of the through-wall welding hydraulic oil; S2: Configure a filter to be connected to the oil tank. The oil inlet of the filter is connected to the bottom of the oil tank, and the oil return port is connected to the top of the oil tank. The filter is used to remove impurities from the hydraulic oil in the oil tank. S3: Start the refrigeration equipment and the filter to control the oil temperature of the hydraulic oil and maintain its cleanliness, thereby ensuring the consistency of the through-wall welding quality.

2. The through-wall welding oil temperature control method as described in claim 1, characterized in that, The refrigeration equipment is an air-cooled chiller, which is equipped with a control panel to adjust the temperature and flow rate of the low-temperature medium.

3. The through-wall welding oil temperature control method as described in claim 2, characterized in that, Both the air-cooled chiller and the filter are equipped with flexible hoses that connect to the oil tank.

4. The method for controlling the oil temperature during through-wall welding as described in claim 1, characterized in that, In S1, detection points A and B are set inside the oil tank for oil temperature detection. Detection point A is the high-temperature zone near the hydraulic pump, and detection point B is the normal-temperature zone far from the hydraulic pump. The temperature of each point is collected every 5 seconds, and the gradient difference ΔT is calculated. AB =T A -T B A hydraulic oil oxidation degree sensor is installed inside the oil tank to detect the hydraulic oil aging degree K. When K ≥ 1.5, it is determined that the oil aging has caused an increase in viscosity, requiring an additional reduction in the circulating water temperature; based on ΔT AB Determine the dynamic compensation amount with K, if ΔT AB If K > 2℃, lower the circulating water temperature by 0.8-1.2℃; if K ≥ 1.5, lower it by an additional 0.5-0.8℃.

5. The through-wall welding oil temperature control method as described in claim 4, characterized in that, A detection point C for oil temperature monitoring is set up inside the oil tank. Detection point C is located in the heat exchange zone near the circulating water pipe, and the heat exchange temperature difference ΔT is calculated. AC =T A -T C If ΔT AC If the temperature is greater than 3℃, then lower it by an additional 0.5-0.7℃.

6. The method for controlling the oil temperature during through-wall welding as described in claim 1, characterized in that, In S2, an online impurity property detector is installed at the oil inlet of the filter to identify the metallic / non-metallic properties and particle size distribution of impurities. If the proportion of metallic impurities is >60% and the particle size is ≥30μm, the first filtration mode is activated, the flow rate of the primary metal mesh filter element is increased to 15L / min, the filtration time is extended to 15 minutes, the flow rate of the intermediate and advanced filter elements is maintained at 10L / min, and the primary filter element is back-purged once every 5 minutes. If the proportion of non-metallic impurities is >60% and the particle size is ≤10μm, the second filtration mode is activated, the intermediate glass fiber filter element and the advanced ceramic filter element are used, and an oil sludge adsorption membrane is installed at the outlet of the advanced ceramic filter element.

7. The through-wall welding oil temperature control method as described in claim 6, characterized in that, Each filter element has a built-in contamination sensor to monitor the amount of impurities S inside the filter element in real time. Combined with the rated dirt holding capacity S0 of the filter element, the remaining life coefficient λ = (S0-S) / S0 is calculated. When λ < 0.3, a filter element warning is issued. At the same time, based on the growth rate of S in the last 3 filtrations, the remaining service life is predicted. If the pressure difference of the primary filter element is ≥ 0.25MPa within the predicted life, it is automatically judged as abnormal wear, filtration is suspended and the monitoring process is triggered.

8. The method for controlling the oil temperature during through-wall welding as described in claim 1, characterized in that, Impurity sensors, viscosity sensors, moisture sensors, and backup sensors are installed at the top, middle, and bottom of the oil tank. After averaging the data from each group, the deviation is checked against the data from adjacent areas. If the deviation of the sensor data in a certain area from the average value exceeds the threshold, the data validity judgment is initiated. If the deviation persists after five consecutive data collections, the sensor is deemed faulty, and the system automatically switches to the backup sensor and issues a sensor maintenance reminder.

9. The method for controlling the oil temperature during through-wall welding as described in claim 1, characterized in that, A paraffin-based phase change energy storage module is embedded in a cryogenic medium storage tank. When the temperature of the cryogenic medium rises above the upper threshold, the paraffin-based phase change energy storage module undergoes a phase change to absorb heat; when the temperature of the cryogenic medium drops below the lower threshold, the paraffin-based phase change energy storage module undergoes a phase change to release heat.

10. The method for controlling the oil temperature during through-wall welding as described in claim 1, characterized in that, The weld penetration and tensile strength data are obtained through the online weld detection system. If the fluctuation amplitude of the penetration or the decrease in tensile strength is greater than the set value, the operating parameters of the filter and the oil impurity content data of the same period are automatically retrieved. If it is determined that the filtration effect is insufficient, the filtration accuracy is increased and the filtration time is extended. If it is determined that the filter element is saturated, the filter element replacement process is initiated.

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