A hydraulic pressure control system for copper tube and fin expansion joint

Abstract

This invention provides a hydraulic pressure control system for expanding copper tubes and fins, comprising: a first data acquisition module for acquiring first parameter information of the copper tube before expansion, second parameter information of the fins before expansion, and relative parameter information of the copper tube and fins before expansion; a second data acquisition module for acquiring historical expansion information of copper tubes and fins of the same type; a data analysis module for pre-analyzing the first parameter information, second parameter information, relative parameter information, and historical expansion information to obtain hydraulic pressure control commands for the current copper tube and fins; and a control module for controlling a hydraulic tube expander to hydraulically expand the current copper tube and fins based on the hydraulic pressure control commands. By controlling and adjusting the hydraulic pressure, the phenomenon of copper tube bending or bursting due to excessive instantaneous pressure in the automatic press is avoided, thus maximizing the expansion quality.

Description

Technical Field

[0001] This invention relates to the field of pressure control technology, and in particular to a hydraulic pressure control system for copper tubes and finned expansion joints. Background Technology

[0002] In the production process of tube-fin heat exchangers, the heat exchange tubes need to be in close contact with the fins that are fitted onto their outer surface to achieve good heat exchange performance. Currently, the common method for connecting heat exchange tubes and fins in China is mechanical expansion joint.

[0003] Mechanical expansion is the most commonly used method both domestically and internationally. Tools for mechanical tube expansion can be electric, pneumatic, or manual. Besides its disadvantages of high labor intensity and low efficiency, this method also suffers from drawbacks. Its working principle relies on the pressure generated by the mechanical expansion balls propelling forward against the inner wall of the copper tube, causing the tube diameter to expand outward. This results in elastic-plastic deformation of the copper tube and fins, leading to a tight expansion connection. However, this process can damage the internal thread structure of the heat exchange copper tube to some extent, and can cause bending or bursting of the copper tube during the mechanical expansion process, resulting in poor expansion quality.

[0004] Therefore, hydraulic expansion jointing, with its advantages of high production efficiency, high expansion joint quality, and low labor intensity, is increasingly being considered by researchers for application in the production of air conditioning heat exchangers. By accurately determining the hydraulic pressure control command of the hydraulic tube expander for the current hydraulic expansion joint of copper tubes and fins, the phenomenon of copper tube bending or bursting can be avoided. Therefore, determining the appropriate hydraulic pressure is particularly important for ensuring the expansion joint quality in hydraulic expansion jointing. Summary of the Invention

[0005] This invention provides a hydraulic pressure control system for the expansion joint of copper tubes and fins, which controls and adjusts the hydraulic pressure to ensure the expansion joint quality to the greatest extent.

[0006] This invention provides a hydraulic pressure control system for the expansion joint of copper tubes and fins, comprising:

[0007] The first data acquisition module is used to acquire the first parameter information of the copper tube before expansion, the second parameter information of the fins before expansion, and the relative parameter information of the copper tube and the fins before expansion.

[0008] The second data acquisition module is used to collect historical expansion connection information of copper tubes and fins of the same type;

[0009] The data analysis module is used to perform pre-analysis on the first parameter information, the second parameter information, the relative parameter information, and the historical expansion information to obtain the current hydraulic pressure control command for the copper tube and fins.

[0010] The control module is used to control the hydraulic tube expander to hydraulically expand the copper tube and fins based on the hydraulic pressure control command.

[0011] Preferably, the first data acquisition module includes:

[0012] Standard acquisition unit is used to acquire standard factory manufacturing data for copper tubes and fins;

[0013] The actual acquisition unit is used to scan and detect the copper tube and fins at the current time, and to obtain the actual parameter information of the copper tube before expansion, the actual parameter information of the fins before expansion, and the actual relative position parameter information of the copper tube and fins before expansion.

[0014] The data integration unit is used to obtain the standard manufacturing data of copper tubes extracted from the standard factory manufacturing data and combine it with the actual parameter information of copper tubes to obtain the first parameter information. At the same time, it extracts the standard manufacturing data of fins and combines it with the actual parameter information of fins to obtain the second parameter information. In addition, it also extracts the standard relative position data of copper tubes and fins and combines it with the actual relative position parameter information to obtain the relative parameter information.

[0015] Preferably, the second data acquisition module includes:

[0016] Model acquisition unit, used to acquire the model combination of copper tubes and fins that are not currently expanded;

[0017] The model matching unit is used to match the corresponding expansion method from the historical expansion database according to the model combination and obtain historical expansion information.

[0018] Preferably, the historical expansion joint information includes: historical expansion joint pressure, historical hydraulic pressure matching the historical expansion joint pressure, historical expansion joint duration, historical hydraulic duration, and historical expansion joint information of the same type of copper tube and fin using the historical hydraulic pressure.

[0019] Preferably, the standard acquisition unit includes:

[0020] The recording subunit is used to record the setting parameters of the copper tube and fins under standard factory conditions, as well as the manufacturing log during the standard manufacturing process. At the same time, it retrieves the analysis template consistent with the standard factory conditions from the analysis database.

[0021] The first analysis subunit is used to perform reverse reasoning on the manufacturing log according to the reverse reasoning mechanism to obtain the manufacturing parameters, and compare and analyze the manufacturing parameters with the set parameters to determine whether they are completely consistent.

[0022] If so, standard factory manufacturing data is obtained based on the set parameters;

[0023] Otherwise, the inconsistent parameters between the manufacturing parameters and the set parameters are calibrated, and according to the calibration results, the threads involved in the inconsistent parameters during the manufacturing process are determined, and the threads involved are calibrated. At the same time, the line calibration results are attached to the corresponding analysis line positions of the analysis template.

[0024] The second analysis subunit is used to analyze the parameter influence weight of the inconsistent parameter under standard factory conditions based on the parameter type and parameter size of the inconsistent parameter.

[0025] The judgment subunit is used to determine the additional length and additional width of each thread point based on the additional results, and combine the parameter influence weight of the inconsistency parameter to obtain the influence characteristics of the inconsistency parameter, and determine whether the influence characteristics meet the preset influence standard.

[0026] If not satisfied, standard factory manufacturing data is obtained based on the set parameters, and the inconsistent parameters are used as the first auxiliary reference data of the standard factory data;

[0027] If satisfied, standard factory data is obtained based on the manufacturing parameters, and the inconsistency parameters are used as the second auxiliary reference data for the standard factory data.

[0028] Preferred options also include:

[0029] The classification module is used to classify the historical expansion information of copper tubes and fins of the same type according to the external expansion environment at the historical expansion time point of the same type of copper tubes and fins.

[0030] The testing module is used to perform thermal performance tests on historical copper tube and fin expansion joint objects that have been completed after the completion of historical hydraulic expansion joints in the same classification results.

[0031] The acquisition module is used to acquire the thermal parameters of each point in each expansion joint object, convert the thermal parameters into thermal uniformity standard values ​​to obtain thermal judgment values, and transmit the thermal judgment values ​​sequentially to the position points based on the blank unfolded diagram of the corresponding expansion joint object to obtain the thermal unfolded diagram.

[0032] The relationship establishment module is used to perform numerical analysis on the thermal expansion diagram according to the expansion rules, determine whether the expansion joint object is thermally uniform, and if so, construct the thermal uniformity characteristics of the expansion joint object composed of historical copper tubes and fins, and establish the characteristic relationship with the hydraulic pressure corresponding to the expansion joint object.

[0033] The retention module is used to solve the optimal solution for each feature relationship based on the feature optimal function, retain the feature relationships that meet the optimal conditions as reference relationships, and generate control instructions to be adjusted.

[0034] If the expanded object is heated unevenly, the corresponding hydraulic pressure will be used as the non-reference pressure.

[0035] Preferably, the data analysis module includes:

[0036] The basic information acquisition unit is used to acquire the expansion time period, expansion progress at each expansion time point, and expansion volume and expansion profile of each copper tube and fin involved in the historical expansion information involved in the same classification results.

[0037] The initial model building unit is used to perform a first planning of the expansion progress at each expansion time point according to the pre-structured expansion cavity, and to perform a second planning of the expansion volume and expansion profile at each expansion time point based on the first planning, so as to build an initial expansion trend model corresponding to each copper tube and fin in the same classification result.

[0038] The expansion determination unit is used to analyze the historical expansion information of different copper tubes and fins under the same external expansion environment, determine the expansion parameters of the expansion objects of the corresponding copper tubes and fins after expansion, and cut the expansion surface of the expansion object according to the object shape and expansion volume, and determine the expansion area and expansion density of each expansion surface based on the expansion parameters.

[0039] At the same time, based on the position of each expansion surface and the expansion area and expansion density of the corresponding expansion surface, the set of expansion surfaces of each copper tube and fin expansion object under the same environment and type is determined.

[0040] The set determination unit is used to determine the center point of the pre-constructed expansion cavity, establish a corresponding expansion body according to each expansion surface set, and perform spatial comparison on each expansion body based on the center point to determine the completely overlapping space and the remaining space. Then, according to the line cutting mechanism, the completely overlapping space and the remaining space in the preset orientation are cut to obtain a first set of cut bodies and a second set of cut bodies in different preset orientations.

[0041] The calibration unit is used to take the maximum expansion edge length and maximum expansion edge width of each first cut body in the first cut body set as the expansion safety range of the corresponding body, and to perform first position and color calibration.

[0042] Determine the overlap ratio of each second cut body in the set of second cut bodies with different preset orientations, and take the maximum expansion edge length and maximum expansion edge width of the largest cut body in the concentrated distribution of the ratio as the corresponding body expansion safety range, and perform second position and color marking;

[0043] The model improvement unit is used to spatially cut the pre-structured expansion cavity based on the first calibration result and the second calibration result to obtain several preset expansion areas;

[0044] Establish the correspondence between the preset expansion joint area and the expansion joint safety range of the corresponding body's location, and locate the center point of the preset expansion joint area in the initial trend model, and set the matching correspondence at the center point to obtain the improved trend model under the same classification result;

[0045] The instruction determination unit is used to determine the expansion joint pattern of historical copper tubes and fins in the same category based on the improved trend model, obtain the instruction adjustment factor, and adjust the control instruction to be adjusted to obtain the reference control instruction.

[0046] Preferably, the data analysis module includes:

[0047] The information analysis unit is used to perform a first analysis on the first parameter information, the second parameter information, and the relative parameter information to determine the current expandable connection status of the copper tube and the fin.

[0048] Determine whether there is a current control command among the reference control commands that matches the expandable connection situation;

[0049] If present, the current control command is transmitted to the hydraulic tube expander;

[0050] If it does not exist, obtain the first control command that is closest to the expandable connection situation, and generate a difference factor according to the expansion difference between the expandable connection situation and the historical expansion situation corresponding to the first control command;

[0051] According to the difference factor, the first control command is adjusted to obtain the second control command, which is then transmitted to the hydraulic tube expander.

[0052] Preferred options also include:

[0053] The monitoring module is used to monitor the current expansion progress and the current expansion information in the current expansion progress in real time when the hydraulic tube expander expands the copper tube and fin according to the received instructions.

[0054] Based on the real-time monitoring results, determine whether the hydraulic pressure needs to be maintained at the next time point;

[0055] If necessary, continue until the next point in time;

[0056] If not required, update the hydraulic pressure for the next time point based on the monitoring results, and continue to expand the copper tube and fins at the current time.

[0057] Preferably, the control module includes:

[0058] The instruction splitting unit is used to split the hydraulic pressure control instruction and arrange the split sub-instructions sequentially based on the timestamp.

[0059] The expansion unit is used to hydraulically expand the copper tubes and fins sequentially according to the layout order.

[0060] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0061] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0062] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0063] Figure 1 This is a structural diagram of a hydraulic pressure control system for the expansion joint of copper tube and fins in an embodiment of the present invention;

[0064] Figure 2 This is a structural diagram of threads involved in an embodiment of the present invention;

[0065] Figure 3 This is a line cutting diagram in an embodiment of the present invention. Detailed Implementation

[0066] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0067] Example 1

[0068] This invention provides a hydraulic pressure control system for the expansion joint of copper tubes and fins, such as... Figure 1 As shown, it includes:

[0069] The first data acquisition module is used to acquire the first parameter information of the copper tube before expansion, the second parameter information of the fins before expansion, and the relative parameter information of the copper tube and the fins before expansion.

[0070] The second data acquisition module is used to collect historical expansion connection information of copper tubes and fins of the same type;

[0071] The data analysis module is used to perform pre-analysis on the first parameter information, the second parameter information, the relative parameter information, and the historical expansion information to obtain the current hydraulic pressure control command for the copper tube and fins.

[0072] The control module is used to control the hydraulic tube expander to hydraulically expand the copper tube and fins based on the hydraulic pressure control command.

[0073] In this embodiment, the first parameter information refers to the information of the copper tube, such as: outer diameter, wall thickness, tube length, density, elastic modulus, Poisson's ratio, tensile strength, yield strength, internal thread, etc., and the second parameter information refers to the information of the fins, such as: total arrangement length, fin length, fin width, fin height, density, elastic modulus, Poisson's ratio, tensile strength, yield strength, etc.

[0074] Relative parameter information refers to the positional information of the copper tube and fins, such as the positional interval and the difference between the left and right positions.

[0075] In this embodiment, the historical expansion information includes: historical information on various components of the fins and their relative parameters, as well as historical expansion pressure, historical expansion time, and the heating, density, and expansion size of the expansion mold between the copper tube and the fins after historical expansion. This information is mainly used as a reference to facilitate comparison with the current copper tube and fins to obtain more accurate control commands.

[0076] In this embodiment, the pre-analysis involves first obtaining a reference instruction based on historical expansion information, and then matching the current relevant parameters of the copper tube and fins with the reference instruction to obtain a hydraulic pressure control instruction, thereby realizing hydraulic expansion and maximizing the optimal expansion effect of the hydraulic pressure.

[0077] In this embodiment, the hydraulic pressure can be obtained according to the following formula:

[0078]

[0079] R2 represents the hydraulic pressure corresponding to the hydraulic tube expander; R1 represents the estimated expansion pressure between the copper tube and the fins; α1 represents the conversion factor between expansion pressure and hydraulic pressure; exp() represents the exponential function; S1(u1) represents the loss of the hydraulic pressure corresponding to the hydraulic tube expander; when the loss is 0, the corresponding R2 = R1 × α1; when there is loss, based on Loss adjustment is performed, where the estimated expansion pressure corresponding to R1 can be calculated according to the existing expansion pressure calculation formula.

[0080] The beneficial effect of the above technical solution is that by controlling and adjusting the hydraulic pressure, the expansion joint quality can be guaranteed to the greatest extent.

[0081] Example 2

[0082] Based on Embodiment 1, the first data acquisition module includes:

[0083] Standard acquisition unit is used to acquire standard factory manufacturing data for copper tubes and fins;

[0084] The actual acquisition unit is used to scan and detect the copper tube and fins at the current time, and to obtain the actual parameter information of the copper tube before expansion, the actual parameter information of the fins before expansion, and the actual relative position parameter information of the copper tube and fins before expansion.

[0085] The data integration unit is used to obtain the standard manufacturing data of copper tubes extracted from the standard factory manufacturing data and combine it with the actual parameter information of copper tubes to obtain the first parameter information. At the same time, it extracts the standard manufacturing data of fins and combines it with the actual parameter information of fins to obtain the second parameter information. In addition, it also extracts the standard relative position data of copper tubes and fins and combines it with the actual relative position parameter information to obtain the relative parameter information.

[0086] The beneficial effects of the above technical solution are: by combining the standard with the actual, the accuracy of the first parameter information, the second parameter information, and the relative parameter information obtained is guaranteed, providing an effective and reliable foundation for the subsequent acquisition of hydraulic pressure control commands.

[0087] Example 3:

[0088] Based on Embodiment 1, the second data acquisition module includes:

[0089] Model acquisition unit, used to acquire the model combination of copper tubes and fins that are not currently expanded;

[0090] The model matching unit is used to match the corresponding expansion method from the historical expansion database according to the model combination and obtain historical expansion information.

[0091] Preferably, the historical expansion joint information includes: historical expansion joint pressure, historical hydraulic pressure matching the historical expansion joint pressure, historical expansion joint duration, historical hydraulic duration, and historical expansion joint information of the same type of copper tube and fin using the historical hydraulic pressure.

[0092] In this embodiment, the historical expansion joint database includes information such as copper tube model, fin model, and expansion joint method (hydraulic pressure).

[0093] The beneficial effects of the above technical solution are: by obtaining the model combination, the expansion connection method can be retrieved, making it convenient to obtain historical expansion connection information and ensuring the rationality of subsequent control command acquisition.

[0094] Example 4:

[0095] Based on Embodiment 2, the standard acquisition unit includes:

[0096] The recording subunit is used to record the setting parameters of the copper tube and fins under standard factory conditions, as well as the manufacturing log during the standard manufacturing process. At the same time, it retrieves the analysis template consistent with the standard factory conditions from the analysis database.

[0097] The first analysis subunit is used to perform reverse reasoning on the manufacturing log according to the reverse reasoning mechanism to obtain the manufacturing parameters, and compare and analyze the manufacturing parameters with the set parameters to determine whether they are completely consistent.

[0098] If so, standard factory manufacturing data is obtained based on the set parameters;

[0099] Otherwise, the inconsistent parameters between the manufacturing parameters and the set parameters are calibrated, and according to the calibration results, the threads involved in the inconsistent parameters during the manufacturing process are determined, and the threads involved are calibrated. At the same time, the line calibration results are attached to the corresponding analysis line positions of the analysis template.

[0100] The second analysis subunit is used to analyze the parameter influence weight of the inconsistent parameter under standard factory conditions based on the parameter type and parameter size of the inconsistent parameter.

[0101] The judgment subunit is used to determine the additional length and additional width of each thread point based on the additional results, and combine the parameter influence weight of the inconsistency parameter to obtain the influence characteristics of the inconsistency parameter, and determine whether the influence characteristics meet the preset influence standard.

[0102] If not satisfied, standard factory manufacturing data is obtained based on the set parameters, and the inconsistent parameters are used as the first auxiliary reference data of the standard factory data;

[0103] If satisfied, standard factory data is obtained based on the manufacturing parameters, and the inconsistency parameters are used as the second auxiliary reference data for the standard factory data.

[0104] In this embodiment, the setting parameters of the copper tube and fins at the time of leaving the factory are first obtained. These parameters are preset. Secondly, the manufacturing log during the manufacturing process is obtained to deduce the actual manufacturing parameters. This is because, in the actual manufacturing process, due to uncontrollable factors or human factors, certain errors may occur. Therefore, a reverse reasoning mechanism (pre-determined) can be used to make a consistent comparison.

[0105] The analysis templates are determined in accordance with the standard factory condition, and the analysis database includes the factory condition and the corresponding analysis templates. The analysis templates are mainly used to analyze the manufacturing process.

[0106] In this embodiment, for example, the parameters set for the copper tube are related to: outer diameter, wall thickness, tube length, density, elastic modulus, Poisson's ratio, tensile strength, yield strength, etc., and the manufacturing parameters derived by reverse reasoning are also related to outer diameter, wall thickness, tube length, density, elastic modulus, Poisson's ratio, tensile strength, yield strength, etc.

[0107] In this embodiment, for example, the outer diameter in the setting parameters may differ from the outer diameter in the manufacturing parameters. However, the outer diameter is relevant to the entire manufacturing process, meaning it involves the entire manufacturing thread. Therefore, the manufacturing thread is calibrated, and the calibration result is appended to the analysis line position.

[0108] like Figure 2 As shown, 01 represents the analysis template, 02 represents the analysis line position, and 03 represents the thread involved at the analysis line position. During the attachment process, the width of the thread involved is adjusted according to the attachment length and width corresponding to different thread points. For example, point a1 represents the length and point a2 represents the width.

[0109] In this embodiment, the parameter influence weights corresponding to each inconsistent parameter are different. For example, inconsistent parameters include elastic modulus, Poisson's ratio, and tensile strength. The final obtained influence features can be related to elastic modulus, Poisson's ratio, and tensile strength to determine whether the preset influence criteria are met.

[0110] For example, the influencing characteristics include: elastic modulus represented by 1, Poisson's ratio represented by 1, and tensile strength represented by 1. In this case, the preset influencing standard is that the values ​​represented should all be greater than 2. In this case, it is considered not satisfied; otherwise, it is considered satisfied.

[0111] In this embodiment, the inconsistent parameters are used as auxiliary reference data, mainly to ensure the rationality of the actual manufactured product.

[0112] The beneficial effects of the above technical solution are: by comparing the set parameters with the manufacturing parameters obtained through reverse reasoning, the threads involved in the inconsistent parameters are determined. Then, by determining the additional length and width and combining them with weights, it is determined whether the preset influence standard is met, thereby determining the relevant factory data and facilitating the subsequent acquisition of the accuracy of control commands.

[0113] Example 5:

[0114] Based on Example 1, it also includes:

[0115] The classification module is used to classify the historical expansion information of copper tubes and fins of the same type according to the external expansion environment at the historical expansion time point of the same type of copper tubes and fins.

[0116] The testing module is used to perform thermal performance tests on historical copper tube and fin expansion joint objects that have been completed after the completion of historical hydraulic expansion joints in the same classification results.

[0117] The acquisition module is used to acquire the thermal parameters of each point in each expansion joint object, convert the thermal parameters into thermal uniformity standard values ​​to obtain thermal judgment values, and transmit the thermal judgment values ​​sequentially to the position points based on the blank unfolded diagram of the corresponding expansion joint object to obtain the thermal unfolded diagram.

[0118] The relationship establishment module is used to perform numerical analysis on the thermal expansion diagram according to the expansion rules, determine whether the expansion joint object is thermally uniform, and if so, construct the thermal uniformity characteristics of the expansion joint object composed of historical copper tubes and fins, and establish the characteristic relationship with the hydraulic pressure corresponding to the expansion joint object.

[0119] The retention module is used to solve the optimal solution for each feature relationship based on the feature optimal function, retain the feature relationships that meet the optimal conditions as reference relationships, and generate control instructions to be adjusted.

[0120] If the expanded object is heated unevenly, the corresponding hydraulic pressure will be used as the non-reference pressure.

[0121] In this embodiment, the thermal properties of different expansion joint objects are determined by classifying them according to the external expansion environment, such as the external temperature and humidity during expansion. The expansion joint object refers to the part between the copper tube and the fin that undergoes plastic deformation after hydraulic expansion.

[0122] In this embodiment, since the expanded object is a three-dimensional structure, a blank unfolded diagram is obtained by unfolding according to unfolding rules, such as unfolding from the highest point to the lowest point in that order. The blank unfolded diagram contains object points, and the thermal judgment value of each object point is displayed at the corresponding point to obtain a thermal unfolded diagram.

[0123] In this embodiment, for example, the thermal judgment values ​​in the thermal unfolding diagram are all within the judgment range and are considered to be thermally uniform. Since there are multiple expanded joint objects in the same classification result, the thermal uniformity characteristics of each expanded joint object are obtained, and in this way, the feature relationship is constructed, that is, the relationship between the thermal uniformity characteristics and the corresponding hydraulic pressure.

[0124] In this embodiment, the feature optimal function is a function that analyzes the feature relationship. By performing the optimal solution, that is, whether the current combination of thermal uniformity feature and hydraulic pressure in the feature relationship is the optimal combination, if so, it is determined that the optimal condition is met, the feature relationship is retained, and the corresponding control command under the feature relationship is obtained, and the control command is regarded as the control command to be adjusted.

[0125] In this embodiment, if the expanded object is heated unevenly, the control command corresponding to the hydraulic pressure can be disregarded, which is equivalent to retaining only the control command under the optimal condition.

[0126] The beneficial effects of the above technical solution are as follows: by classifying according to the external expansion environment, then conducting thermal performance tests and obtaining thermal expansion diagrams, thermal uniformity characteristics are obtained. Furthermore, by establishing characteristic relationships and finding the optimal solution, it is determined whether to retain these characteristics, thereby obtaining the most valuable control commands and providing the optimal reference basis for subsequent hydraulic pressure control, ensuring the rationality of subsequent hydraulic pressure control.

[0127] Example 6:

[0128] Based on Embodiment 1, the data analysis module includes:

[0129] The basic information acquisition unit is used to acquire relevant historical information based on the classification results.

[0130] The expansion time period of each copper tube and fin, the expansion progress at each expansion time point, and the expansion volume and expansion profile at each expansion time point;

[0131] The initial model building unit is used to perform a first planning of the expansion progress at each expansion time point according to the pre-structured expansion cavity, and to perform a second planning of the expansion volume and expansion profile at each expansion time point based on the first planning, so as to build an initial expansion trend model corresponding to each copper tube and fin in the same classification result.

[0132] The expansion determination unit is used to analyze the historical expansion information of different copper tubes and fins under the same external expansion environment, determine the expansion parameters of the expansion objects of the corresponding copper tubes and fins after expansion, and cut the expansion surface of the expansion object according to the object shape and expansion volume, and determine the expansion area and expansion density of each expansion surface based on the expansion parameters.

[0133] At the same time, based on the position of each expansion surface and the expansion area and expansion density of the corresponding expansion surface, the set of expansion surfaces of each copper tube and fin expansion object under the same environment and type is determined.

[0134] The set determination unit is used to determine the center point of the pre-constructed expansion cavity, establish a corresponding expansion body according to each expansion surface set, and perform spatial comparison on each expansion body based on the center point to determine the completely overlapping space and the remaining space. Then, according to the line cutting mechanism, the completely overlapping space and the remaining space in the preset orientation are cut to obtain a first set of cut bodies and a second set of cut bodies in different preset orientations.

[0135] The calibration unit is used to take the maximum expansion edge length and maximum expansion edge width of each first cut body in the first cut body set as the expansion safety range of the corresponding body, and to perform first position and color calibration.

[0136] Determine the overlap ratio of each second cut body in the set of second cut bodies with different preset orientations, and take the maximum expansion edge length and maximum expansion edge width of the largest cut body in the concentrated distribution of the ratio as the corresponding body expansion safety range, and perform second position and color marking;

[0137] The model improvement unit is used to spatially cut the pre-structured expansion cavity based on the first calibration result and the second calibration result to obtain several preset expansion areas;

[0138] Establish the correspondence between the preset expansion joint area and the expansion joint safety range of the corresponding body's location, and locate the center point of the preset expansion joint area in the initial trend model, and set the matching correspondence at the center point to obtain the improved trend model under the same classification result;

[0139] The instruction determination unit is used to determine the expansion joint pattern of historical copper tubes and fins in the same category based on the improved trend model, obtain the instruction adjustment factor, and adjust the control instruction to be adjusted to obtain the reference control instruction.

[0140] In this embodiment, the pre-formed expansion cavity refers to the space that accommodates the expanded object during the expansion process of the copper tube and fin.

[0141] In this embodiment, during the expansion process, the expansion may end in 5 seconds. At this time, the 5 seconds can be divided into 1 second, and each second can be regarded as an expansion time point. In this way, the expansion progress, expansion volume and expansion outline at the expansion time point can be determined, and then a planning can be carried out to obtain an initial expansion trend model.

[0142] In this embodiment, the expansion surface of the expanding object is cut into two-dimensional surfaces. Then, the density and area of ​​the surface are determined by combining expansion parameters such as density and area, and an expansion surface set is constructed. The expansion surface set includes surface position, surface area, density, etc.

[0143] In this embodiment, the center point of the pre-formed expansion cavity refers to the point at the very center.

[0144] In this embodiment, the expansion body is constructed in the pre-constructed expansion cavity based on the set of expansion surfaces. Since there are several expansion bodies under the same classification result, the completely overlapping space and the remaining space (excluding the completely overlapping space) are obtained by spatial comparison.

[0145] In this embodiment, the line cutting mechanism, for example, cuts along the lines of the edge of the expansion body, such as... Figure 3 As shown, each line can be cut, and the corresponding fully overlapping space is A1. The remaining space is the residual space. The fully overlapping space can form the first cutting body set, which means that there is a fully overlapping space under the same classification result in the first cutting body set. The second cutting set includes the space of different overlapping situations remaining after removing the fully overlapping space under the corresponding orientation.

[0146] In this embodiment, by determining the maximum expansion edge length and width, the safe range of expansion can be determined for calibration.

[0147] In this embodiment, for example, in the second set of cutting bodies, there are overlapping ratios of the second cutting bodies, such as second cutting bodies 1, 2, and 3. At this time, the overlapping ratio of cutting body 1 with cutting body 2 is a1, the overlapping ratio with cutting body 3 is a2, the overlapping ratio of cutting body 1 with cutting bodies 2 and 3 is a4, the overlapping ratio of cutting body 2 with cutting body 3 is a3, and the overlapping ratio of cutting body 2 with cutting bodies 1 and 3 is a5. At this time, by arranging the overlapping ratios, the concentrated ratio portion is determined, thereby determining the length and width of the largest cutting body corresponding to the concentrated ratio portion, and thus obtaining the expansion joint safety range.

[0148] In this embodiment, a preset expansion joint area can be obtained by dividing the area according to the calibration results.

[0149] In this embodiment, the initial trend model is improved by constructing a correspondence and locating the center point, resulting in an improved trend model. Then, the reference control command is adjusted by determining the expansion law.

[0150] The beneficial effects of the above technical solution are: by analyzing the expansion joint object in the expansion joint process, the expansion joint safety range under different conditions can be determined, and then by establishing the corresponding relationship, an improvement trend model can be obtained. Furthermore, by determining the expansion law, the adjustment command under the condition of uniform heating can be adjusted to obtain the reference control command. This facilitates the direct acquisition of hydraulic pressure before the current copper tube and fins are hydraulically connected, ensuring not only hydraulic efficiency but also expansion joint rationality.

[0151] Example 7:

[0152] Based on Embodiment 1, the data analysis module includes:

[0153] The information analysis unit is used to perform a first analysis on the first parameter information, the second parameter information, and the relative parameter information to determine the current expandable connection status of the copper tube and the fin.

[0154] Determine whether there is a current control command among the reference control commands that matches the expandable connection situation;

[0155] If present, the current control command is transmitted to the hydraulic tube expander;

[0156] If it does not exist, obtain the first control command that is closest to the expandable connection situation, and generate a difference factor according to the expansion difference between the expandable connection situation and the historical expansion situation corresponding to the first control command;

[0157] According to the difference factor, the first control command is adjusted to obtain the second control command, which is then transmitted to the hydraulic tube expander.

[0158] In this embodiment, the expandable connection situation refers to the optimal expansion connection that can be made between the copper tube and the fin at present, and then the expansion connection is performed through matching instructions.

[0159] The beneficial effects of the above technical solution are: by determining the expandable connection conditions, control commands can be matched to achieve effective expansion connection, realize the rationality of automatic expansion connection control, and ensure the quality of expansion connection.

[0160] Example 8:

[0161] Based on Example 1, it also includes:

[0162] The monitoring module is used to monitor the current expansion progress and the current expansion information in the current expansion progress in real time when the hydraulic tube expander expands the copper tube and fin according to the received instructions.

[0163] Based on the real-time monitoring results, determine whether the hydraulic pressure needs to be maintained at the next time point;

[0164] If necessary, continue until the next point in time;

[0165] If not required, update the hydraulic pressure for the next time point based on the monitoring results, and continue to expand the copper tube and fins at the current time.

[0166] The beneficial effect of the above technical solution is that the hydraulic pressure needs to be adjusted in real time during the expansion process to ensure the rationality of the expansion to the greatest extent.

[0167] Example 9:

[0168] Based on Embodiment 1, the control module includes:

[0169] The instruction splitting unit is used to split the hydraulic pressure control instruction and arrange the split sub-instructions sequentially based on the timestamp.

[0170] The expansion unit is used to hydraulically expand the copper tubes and fins sequentially according to the layout order.

[0171] In this embodiment, the first splitting sub-instruction of the hydraulic expansion process is located and regarded as the initial sub-instruction;

[0172] Based on the standard expansion results corresponding to each sub-instruction in the hydraulic expansion process, the first expansion assessment of the copper tube and fins is performed.

[0173]

[0174] Where Y1 represents the first expansion evaluation result; n1 represents the total number of split sub-instructions; y i F(y) represents the standard expansion result corresponding to the i-th split sub-instruction; i ,y i+1 F(y) represents the expansion connection factor between the standard expansion result corresponding to the i-th sub-instruction and the standard expansion result corresponding to the (i+1)-th sub-instruction. The tighter the connection, the closer the corresponding value is to 0.5; otherwise, it is close to 0. i ,y i-1 ) represents the expansion connection factor between the standard expansion result corresponding to the i-th split sub-instruction and the standard expansion result corresponding to the (i-1)-th split sub-instruction. The tighter the connection, the closer the corresponding value is to 0.5; otherwise, it is close to 0.

[0175] When the first expansion joint evaluation result meets the preset expansion joint conditions, the expansion joint is performed according to the split sub-instruction, and the actual expansion joint result corresponding to each split sub-instruction is monitored.

[0176] When the actual expansion result of the initial subinstruction satisfies y i -x i When the value is ≥0.1, the difference in expansion result corresponding to the initial sub-instruction is obtained, and the difference in expansion result is input into the instruction adjustment model. The instruction adjustment factor is output, and the hydraulic pressure of the next sub-instruction is adjusted according to the instruction adjustment factor until the pressure expansion is completed according to all the split sub-instructions.

[0177] When the actual expansion result of the initial sub-instruction does not satisfy y i -x i If the value is ≥0.1, continue with the hydraulic expansion joint according to the next sub-instruction.

[0178] In this embodiment, the instruction adjustment model is trained using different expansion differences and adjustment factors as samples.

[0179] The beneficial effect of the above technical solution is that by splitting the instructions and matching them with timestamps, the effective execution of different split sub-instructions can be guaranteed, thereby ensuring the efficiency of hydraulic expansion jointing.

[0180] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A hydraulic pressure control system for the expansion joint of copper tubes and fins, characterized in that, include: The first data acquisition module is used to acquire the first parameter information of the copper tube before expansion, the second parameter information of the fins before expansion, and the relative parameter information of the copper tube and the fins before expansion, including: Standard acquisition unit is used to acquire standard factory manufacturing data for copper tubes and fins; The actual acquisition unit is used to scan and detect the copper tube and fins at the current time, and to obtain the actual parameter information of the copper tube before expansion, the actual parameter information of the fins before expansion, and the actual relative position parameter information of the copper tube and fins before expansion. The data integration unit is used to obtain the standard manufacturing data of copper tubes extracted from the standard factory manufacturing data and combine it with the actual parameter information of copper tubes to obtain the first parameter information. At the same time, it extracts the standard manufacturing data of fins and combines it with the actual parameter information of fins to obtain the second parameter information. In addition, it also extracts the standard relative position data of copper tubes and fins and combines it with the actual relative position parameter information to obtain the relative parameter information. The second data acquisition module is used to collect historical expansion connection information of copper tubes and fins of the same type; The data analysis module is used to perform pre-analysis on the first parameter information, the second parameter information, the relative parameter information, and the historical expansion information to obtain the current hydraulic pressure control command for the copper tube and fins. The control module is used to control the hydraulic tube expander to hydraulically expand the copper tube and fins based on the hydraulic pressure control command.

2. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 1, characterized in that, The second data acquisition module includes: Model acquisition unit, used to acquire the model combination of copper tubes and fins that are not currently expanded; The model matching unit is used to match the corresponding expansion method from the historical expansion database according to the model combination and obtain historical expansion information.

3. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 2, characterized in that, The historical expansion information includes: historical expansion pressure, historical hydraulic pressure matching the historical expansion pressure, historical expansion duration, historical hydraulic duration, and historical expansion conditions of the same type of copper tube and fin using the historical hydraulic pressure.

4. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 1, characterized in that, The standard acquisition unit includes: The recording subunit is used to record the setting parameters of the copper tube and fins under standard factory conditions, as well as the manufacturing log during the standard manufacturing process. At the same time, it retrieves the analysis template consistent with the standard factory conditions from the analysis database. The first analysis subunit is used to perform reverse reasoning on the manufacturing log according to the reverse reasoning mechanism to obtain the manufacturing parameters, and compare and analyze the manufacturing parameters with the set parameters to determine whether they are completely consistent. If so, standard factory manufacturing data is obtained based on the set parameters; Otherwise, the inconsistent parameters between the manufacturing parameters and the set parameters are calibrated, and according to the calibration results, the threads involved in the inconsistent parameters during the manufacturing process are determined, and the threads involved are calibrated. At the same time, the line calibration results are attached to the corresponding analysis line positions of the analysis template. The second analysis subunit is used to analyze the parameter influence weight of the inconsistent parameter under standard factory conditions based on the parameter type and parameter size of the inconsistent parameter. The judgment subunit is used to determine the additional length and additional width of each thread point based on the additional results, and combine the parameter influence weight of the inconsistency parameter to obtain the influence characteristics of the inconsistency parameter, and determine whether the influence characteristics meet the preset influence standard. If not satisfied, standard factory manufacturing data is obtained based on the set parameters, and the inconsistent parameters are used as the first auxiliary reference data of the standard factory data. If satisfied, standard factory data is obtained based on the manufacturing parameters, and the inconsistency parameters are used as the second auxiliary reference data for the standard factory data.

5. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 1, characterized in that, Also includes: The classification module is used to classify the historical expansion information of copper tubes and fins of the same type according to the external expansion environment at the historical expansion time point of the same type of copper tubes and fins. The testing module is used to perform thermal performance tests on historical copper tube and fin expansion joint objects that have been completed after the completion of historical hydraulic expansion joints in the same classification results. The acquisition module is used to acquire the thermal parameters of each point in each expansion joint object, convert the thermal parameters into thermal uniformity standard values ​​to obtain thermal judgment values, and transmit the thermal judgment values ​​sequentially to the position points based on the blank unfolded diagram of the corresponding expansion joint object to obtain the thermal unfolded diagram. The relationship establishment module is used to perform numerical analysis on the thermal expansion diagram according to the expansion rules, determine whether the expansion joint object is thermally uniform, and if so, construct the thermal uniformity characteristics of the expansion joint object composed of historical copper tubes and fins, and establish the characteristic relationship with the hydraulic pressure corresponding to the expansion joint object. The retention module is used to solve the optimal solution for each feature relationship based on the feature optimal function, retain the feature relationships that meet the optimal conditions as reference relationships, and generate control instructions to be adjusted. If the expanded object is heated unevenly, the corresponding hydraulic pressure will be used as the non-reference pressure.

6. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 5, characterized in that, The data analysis module includes: The basic information acquisition unit is used to acquire the expansion time period, expansion progress at each expansion time point, and expansion volume and expansion profile of each copper tube and fin involved in the historical expansion information involved in the same classification results. The initial model building unit is used to perform a first planning of the expansion progress at each expansion time point according to the pre-structured expansion cavity, and to perform a second planning of the expansion volume and expansion profile at each expansion time point based on the first planning, so as to build an initial expansion trend model corresponding to each copper tube and fin in the same classification result. The expansion determination unit is used to analyze the historical expansion information of different copper tubes and fins under the same external expansion environment, determine the expansion parameters of the expansion objects of the corresponding copper tubes and fins after expansion, and cut the expansion surface of the expansion object according to the object shape and expansion volume, and determine the expansion area and expansion density of each expansion surface based on the expansion parameters. At the same time, based on the position of each expansion surface and the expansion area and expansion density of the corresponding expansion surface, the set of expansion surfaces of each copper tube and fin expansion object under the same environment and type is determined. The set determination unit is used to determine the center point of the pre-constructed expansion cavity, establish a corresponding expansion body according to each expansion surface set, and perform spatial comparison on each expansion body based on the center point to determine the completely overlapping space and the remaining space. Then, according to the line cutting mechanism, the completely overlapping space and the remaining space in the preset orientation are cut to obtain a first set of cut bodies and a second set of cut bodies in different preset orientations. The calibration unit is used to take the maximum expansion edge length and maximum expansion edge width of each first cut body in the first cut body set as the expansion safety range of the corresponding body, and to perform first position and color calibration. Determine the overlap ratio of each second cut body in the set of second cut bodies with different preset orientations, and take the maximum expansion edge length and maximum expansion edge width of the largest cut body in the concentrated distribution of the ratio as the corresponding body expansion safety range, and perform second position and color marking; The model improvement unit is used to spatially cut the pre-structured expansion cavity based on the first calibration result and the second calibration result to obtain several preset expansion areas; Establish the correspondence between the preset expansion joint area and the expansion joint safety range of the corresponding body's location, and locate the center point of the preset expansion joint area in the initial trend model, and set the matching correspondence at the center point to obtain the improved trend model under the same classification result; The instruction determination unit is used to determine the expansion joint pattern of historical copper tubes and fins in the same category based on the improved trend model, obtain the instruction adjustment factor, and adjust the control instruction to be adjusted to obtain the reference control instruction.

7. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 6, characterized in that, The data analysis module also includes: The information analysis unit is used to perform a first analysis on the first parameter information, the second parameter information, and the relative parameter information to determine the current expandable connection status of the copper tube and the fin. Determine whether there is a current control command among the reference control commands that matches the expandable connection situation; If present, the current control command is transmitted to the hydraulic tube expander; If it does not exist, obtain the first control command that is closest to the expandable connection situation, and generate a difference factor according to the expansion difference between the expandable connection situation and the historical expansion situation corresponding to the first control command; According to the difference factor, the first control command is adjusted to obtain the second control command, which is then transmitted to the hydraulic tube expander.

8. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 1, characterized in that, Also includes: The monitoring module is used to monitor the current expansion progress and the current expansion information in the current expansion progress in real time when the hydraulic tube expander expands the copper tube and fin according to the received instructions. Based on the real-time monitoring results, determine whether the hydraulic pressure needs to be maintained at the next time point; If necessary, continue until the next point in time; If not required, update the hydraulic pressure for the next time point based on the monitoring results, and continue to expand the copper tube and fins at the current time.

9. The hydraulic pressure control system for the expansion joint of copper tube and fins as described in claim 1, characterized in that, The control module includes: The instruction splitting unit is used to split the hydraulic pressure control instruction and arrange the split sub-instructions sequentially based on the timestamp. The expansion unit is used to hydraulically expand the copper tubes and fins sequentially according to the layout order.

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