A method and system for shielding a medium voltage power cable

Abstract

The present application belongs to the field of cable manufacturing, and particularly relates to a medium-voltage power cable shielding layer wrapping method and system. The method comprises: obtaining shielding tape parameters and process parameters, determining a target overlap width and dividing production sections; screening cable core effective outer diameter values and corresponding to production sections, determining a target wrapping pitch; determining a wrapping rotation speed according to the target wrapping pitch and a traction line speed and recording data; obtaining an overlap boundary sequence and corresponding to production sections, determining an actual wrapping pitch and an actual overlap width; comparing the actual and target overlap widths, and when there is a deviation, determining a post-correction wrapping rotation speed according to the actual wrapping pitch of the deviation production section, operation data and the target wrapping pitch of the current section, and comparing and verifying the overlap width of the production section. The system executes the above processing by parameter, production section matching, wrapping parameter, overlap parameter and correction control modules. The present application continuously corresponds wrapping parameters, detection results and production sections, and improves the consistency of shielding tape overlap states.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing technology. More specifically, this invention relates to a method and system for wrapping the shielding layer of a medium-voltage power cable. Background Technology

[0002] Medium-voltage power cables typically consist of a conductor, conductor shield, insulation, insulation shield, metallic shield, and sheath. The metallic shield layer is crucial for homogenizing the electric field on the insulation surface, providing a fault current path, and reducing external electromagnetic interference; it is a critical step in cable manufacturing and shield formation. The metallic shield layer can be formed using copper tape, aluminum alloy tape, or metal wire. Overlapping copper tape wrapping is commonly used in medium-voltage power cable production. During wrapping, the cable is continuously pulled along the production line, and the tape reel or wrapping head rotates around the cable core, causing the shielding tape to cover the insulated core in a spiral shape. Adjacent tape layers form a certain overlap width. Related processing involves cable shielding, sheath wrapping, tape unwinding, traction conveying, tension control, and online testing.

[0003] The bandwidth and thickness of the shielding tape have manufacturing tolerances, and the outer diameter and cross-section of the insulated wire core may vary. Fluctuations in traction speed, wrapping speed, tape tension, and equipment response during production also affect the spiral wrapping pitch and the actual overlap. Insufficient overlap can create shielding gaps, impacting the electrical continuity and structural integrity of the metal shielding layer. Excessive overlap increases material consumption and may cause localized thickening, surface unevenness, or difficulties in subsequent sheath processing. Therefore, wrapping equipment typically pre-sets the overlap rate, pitch, and speed according to product specifications, and judges the wrapping appearance through manual inspection, stop measurement, or downstream visual inspection.

[0004] Chinese invention patent CN104103379A discloses a manufacturing process for cross-linked polyethylene insulated, non-extruded shielded medium-voltage power cables. It mentions coating the insulation layer with silicone oil and then sequentially wrapping it with semi-conductive tape shielding, copper tape shielding, and non-woven fabric, and employing a tension control system to adjust the tension during the wrapping process. Chinese invention patent CN101430951A discloses a single-sided cable wrapping mechanism, mentioning a method of simultaneously wrapping the cable core by setting multiple wrapping tape seats on an inclined base, allowing the wrapping tape to pass through the conductor holes of the conductor seats and rotate around the cable with the mechanism.

[0005] However, existing processes often use nominal dimensions and fixed parameters to organize continuous production. When the size of the shielding tape, the actual outer diameter of the cable core, and the operating conditions change, the preset pitch and rotation speed are not sufficiently adaptable to the current wrapping conditions. Furthermore, upstream dimension measurement, wrapping operation records, and downstream overlap detection are located at different positions on the production line, making it difficult for the detection results to correspond to the actual cable sections with deviations. When operators adjust the equipment accordingly, they are prone to judgment delays or inconsistent adjustment criteria. The adjusted overlap status is also difficult to confirm in a timely manner. Therefore, during continuous wrapping, overlap width fluctuations, partial omissions, or repeated adjustments may still occur, affecting the consistency of the forming of the shielding layer of medium-voltage power cables and the production stability. Summary of the Invention

[0006] To address the technical problems mentioned above regarding the difficulty in adapting the wrapping control to the wrapping conditions of each production section during continuous wrapping of medium-voltage power cable shielding tape, the difficulty in continuously matching the overlap detection results with the actual wrapping production section, and the untimely confirmation of overlap deviation adjustment and correction results, this invention provides a method for wrapping the shielding layer of medium-voltage power cables. The method includes: dividing the continuously transported cable into production sections and tracking them; implementing shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section; detecting the overlap status of each production section and identifying production sections with overlap deviations; correcting the current wrapping control using the actual wrapping relationship reflected by the production sections with overlap deviations; detecting the overlap status of the corrected production section and maintaining or continuing to correct the wrapping control based on the detection results.

[0007] This invention tracks the production sections of continuously transmitting cables, implements shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section, and sequentially completes overlap status detection, overlap deviation production section identification, current wrapping control correction, and corrected overlap status detection. This allows the wrapping control to be adjusted according to the wrapping conditions of each production section, ensuring that the overlap detection results are consistent with the corresponding production section, and making the overlap deviation adjustment and correction results more timely, thereby improving the consistency of the shielding tape overlap status of medium-voltage power cables.

[0008] The present invention describes dividing continuously transported cables into production sections and tracking them, including: characterizing the transport position of the cable with the cable material coordinates corresponding to the wrapping reference position, continuously establishing production sections according to a preset section length, and converting the detection positions before and after wrapping to the cable material coordinates so that the same cable section is classified into the same production section at different detection positions.

[0009] This invention tracks the cable's transport position using the cable material coordinates corresponding to the wrapping reference position, and converts the detection positions before and after wrapping to the cable material coordinates, so that the same cable section maintains the same production section affiliation at different detection positions, reducing data mismatch caused by continuous transport and differences in detection positions.

[0010] The present invention describes the implementation of shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section, including: determining the target overlap width based on the shielding tape size and target overlap rate; determining the target wrapping pitch based on the cable core outer diameter, shielding tape size and target overlap width in the production section; and determining the wrapping rotation speed based on the target wrapping pitch and traction speed.

[0011] This invention determines the target overlap width based on the shielding tape size and target overlap rate, determines the target wrapping pitch based on the outer diameter of the cable core in the production section, and determines the wrapping speed accordingly. This enables the wrapping control of each production section to reflect changes in the shielding tape size, cable core outer diameter, and traction speed, reducing the impact of fixed wrapping parameters on the overlap state of the shielding tape of medium-voltage power cables.

[0012] The present invention describes the implementation of shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section, including: sending the wrapping rotation speed to the wrapping driver, recording the traction speed and actual wrapping rotation speed to the corresponding production section according to the preset sampling period, and determining the average traction speed and average actual wrapping rotation speed based on the production section records.

[0013] This invention records the traction speed and actual wrapping speed to the corresponding production section according to a preset sampling period, and determines the average traction speed and average actual wrapping speed based on the production section records, so that each production section has wrapping operation data corresponding to the actual operation process, reducing the impact of instantaneous speed fluctuations on subsequent wrapping control correction.

[0014] The detection of the overlap status of each production section according to the present invention includes: converting the overlap boundary on the same side obtained at the downstream detection position into cable material coordinates and classifying it into the corresponding production section; determining the actual wrapping pitch according to the distance between adjacent overlap boundaries in the same production section; and determining the actual overlap width according to the actual wrapping pitch and the size of the shielding tape.

[0015] This invention converts the same-side overlap boundary obtained from the downstream detection location into cable material coordinates and assigns it to the corresponding production section. Then, based on the distance between adjacent overlap boundaries within the same production section, it determines the actual wrapping pitch and the actual overlap width, so that the downstream detection results can be mapped to the production section that forms the overlap state. This facilitates the determination of the actual overlap state of the shielding tape of medium-voltage power cables according to the production section.

[0016] The method for identifying overlapping deviation production sections according to the present invention includes: comparing the actual overlapping width and the target overlapping width of the same production section, and determining the production section whose deviation exceeds the allowable overlapping width deviation as the overlapping deviation production section.

[0017] This invention compares the actual overlap width and the target overlap width of the same production section, and uses the allowable overlap width deviation as the judgment limit for the overlap deviation production section, so that each production section adopts a consistent deviation identification basis and reduces unnecessary corrections caused by normal overlap fluctuations.

[0018] The present invention describes correcting the current wrapping control by utilizing the actual wrapping relationship reflected in the overlap deviation production section, including: determining the correspondence between the actual wrapping pitch and the wrapping operation based on the actual wrapping pitch, average traction speed, and average actual wrapping rotation speed of the overlap deviation production section; and determining the basic wrapping rotation speed using the correspondence, the current traction speed, and the target wrapping pitch of the current production section.

[0019] This invention determines the correspondence between the actual wrapping pitch and the wrapping operation based on the actual wrapping pitch, average traction speed, and average actual wrapping speed of the cover deviation production section. It also determines the basic wrapping speed by combining the current traction speed and the target wrapping pitch of the current production section. This allows the actual wrapping relationship reflected by the cover deviation production section to be used for the current wrapping control, reducing the adjustment deviation caused by determining the wrapping speed only according to the preset relationship.

[0020] The present invention describes correcting the current wrapping control by utilizing the actual wrapping relationship reflected in the production section of the overlap deviation, including: determining the wrapping speed after correction based on the deviation between the basic wrapping speed and the wrapping speed before correction, and limiting the change of wrapping speed in a single operation according to a preset correction range.

[0021] This invention determines the winding speed after correction based on the deviation between the basic winding speed and the winding speed before correction, and limits the change of the winding speed in a single operation according to a preset correction range, so that the winding speed is corrected according to the limited range, reducing the impact of excessive single changes on the stability of the shielding tape winding.

[0022] The detection and correction of the overlapping state of the production section described in this invention includes: sending the wrapping speed after correction and maintaining the correction lock state; determining the complete production section formed after the actual wrapping speed stabilizes as the verification production section; comparing the actual overlapping width of the verification production section with the target overlapping width; and releasing the correction lock state or correcting the wrapping control again based on the comparison result.

[0023] This invention maintains the correction lock state after sending the correction and the wrapping speed, and verifies the overlapping state with the complete production section formed after the actual wrapping speed stabilizes. This reduces the interference of the production section formed during the speed change period in the judgment of the correction result, reduces the repeated correction caused by the transition state data, and at the same time reserves the path to continue correction in the case where the target overlapping width is not reached.

[0024] This invention also provides a medium-voltage power cable shielding wrapping system, comprising: a parameter module for acquiring shielding tape parameters and a target overlap width; a production section matching module for matching the outer diameter sampling value and the overlap boundary to the production section; a wrapping parameter module for acquiring a target wrapping pitch based on the outer diameter sampling value and shielding tape parameters; an overlap parameter module for obtaining the actual wrapping pitch and the actual overlap width based on the overlap boundary; and a correction control module for acquiring the wrapping rotation speed after correction based on the target wrapping pitch and the actual wrapping pitch, and acquiring the correction result based on the actual overlap width and the target overlap width.

[0025] This invention completes parameter acquisition, production section matching, wrapping parameter acquisition, overlapping parameter acquisition, and correction control through parameter module, production section matching module, wrapping parameter acquisition, overlapping parameter acquisition, and correction control, respectively. This enables the wrapping process of the shielding layer of medium-voltage power cables to be connected in modules, facilitating the transmission of production data and correction results within the system.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention implements shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of the production section, so that the shielding tape size, cable core outer diameter and traction speed can be implemented to the target overlap width, target wrapping pitch and wrapping speed of the corresponding production section, reducing the overlap width fluctuation caused by the inability of nominal size and fixed parameters to adapt to the changes in continuous production conditions.

[0027] This invention uses cable material coordinates to track production sections, classifying the detection position before and after wrapping, traction speed, actual wrapping speed, and overlapping boundary on the same side into the corresponding production sections. This ensures that the cable core outer diameter, shielding wrapping process, and downstream overlapping state remain consistent along the same cable section, reducing the impact of the separation between the detection position and the wrapping position on overlapping deviation production section identification and wrapping control correction.

[0028] This invention utilizes the actual wrapping relationship reflected in the overlap deviation production section to correct the current wrapping control, and confirms the correction result through the complete production section after the actual wrapping speed stabilizes. This allows the overlap deviation adjustment to be carried out gradually according to the actual operating state, reducing repeated adjustments caused by transition state data and improving the consistency and production stability of the overlap state of the shielding tape of medium-voltage power cables. Attached Figure Description

[0029] Figure 1 This invention illustrates a flowchart of a method for wrapping the shielding layer of a medium-voltage power cable. Figure 2 This diagram illustrates the effective outer diameter sampling values ​​and the average outer diameter of the production section. Figure 3 This diagram shows the actual overlap width and the target overlap width. Figure 4The diagram shows the wrapping speed response after correction. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.

[0031] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] This invention discloses a method for wrapping the shielding layer of a medium-voltage power cable, referring to... Figure 1 This includes steps S1-S5: The present invention includes a wire feeding device, a dual-axis laser diameter gauge, a shielding tape unwinding device, a shielding tape tension control device, a shielding tape wrapping device, a laser profile sensor, a track traction device, and a wire take-up device along the travel direction of the cable core to be wrapped; the traction encoder is installed on the track traction device, and the shielding tape wrapping driver is installed on the shielding tape wrapping device.

[0033] The production controller of this invention is connected to a dual-axis laser diameter gauge, a shielding tape tension control device, a laser profile sensor, a traction encoder, and a shielding tape wrapping driver. The production controller of this invention is used to record cable material coordinates, divide production sections, save production section parameters, obtain actual overlap width, match production sections, adjust shielding tape wrapping speed, and verify correction results.

[0034] In this invention, process parameters not specifically described in the acquisition method are read from the product process file by the production controller, and equipment parameters are read from the parameter table or control interface of the corresponding equipment. The initial traction line speed and maximum traction line speed are read from the product process file, while the diameter measurement sampling period, effective detection length, and allowable single rotation speed change value are read from the corresponding equipment parameters. The production section length is set to five times the maximum allowable wrapping pitch. The single pulse length of the traction encoder is calibrated using a known length of calibration cable core. The production start mark is confirmed by the operator after aligning it with the wrapping reference position. Data without equipment alarms and within the sampling range of the corresponding production section are considered valid data. The laser contour sensor obtains the local detection coordinates of the same-side overlap boundary based on the direction of the contour height change. The wrapping speed before correction is the wrapping speed command value sent last and still being executed before this correction.

[0035] S1: Obtain product parameters and equipment location parameters.

[0036] It should be noted that the target overlap width is determined by the shielding tape width and the target overlap rate, and the target wrapping pitch is also related to the shielding tape thickness and the average outer diameter of the production section. If the shielding tape parameters are incorrect, the subsequently calculated target overlap width and target wrapping pitch will deviate from the requirements of the product process documents. The dual-axis laser diameter gauge and laser profile sensor are located upstream and downstream of the shielding tape wrapping reference position, respectively. If the upstream or downstream path length is incorrect, the outer diameter sampling value and overlap detection result will correspond to the wrong production section. Therefore, the production controller of this invention needs to obtain the shielding tape parameters and calibrate the equipment position parameters before formal wrapping, and determine the upstream path length, production section length, and effective detection length based on the maximum traction line speed, sampling period, and maximum allowable wrapping pitch.

[0037] Specifically, the production controller of the present invention receives five measurements of the width of the shielding strip and five measurements of the thickness of the shielding strip; the five measurement positions are evenly distributed along the shielding strip, which is in a straight and unstretched state, and the width of the shielding strip is measured by a vernier caliper and the thickness of the shielding strip is measured by a thickness gauge.

[0038] The production controller of this invention uses the median method to process the shielding tape width measurement values. The production controller arranges the five shielding tape width measurements in ascending order and takes the median value as the shielding tape width.

[0039] The production controller of this invention uses the median method to process the shielding tape thickness measurement value; the production controller of this invention arranges the 5 shielding tape thickness measurement values ​​according to their numerical values ​​and takes the median value as the shielding tape thickness.

[0040] The production controller of this invention reads the target overlap rate and allowable overlap width deviation from the product process document; the target overlap rate is in decimal form, and the allowable overlap width deviation is in millimeters.

[0041] Specifically, the production controller of the present invention receives the upstream path length and the downstream path length. The upstream path length is the length measured along the actual travel path of the cable core to be wrapped between the upstream outer diameter detection reference position and the shielding tape wrapping reference position. The downstream path length is the length measured along the actual travel path of the wrapped cable between the shielding tape wrapping reference position and the downstream overlap detection reference position.

[0042] This invention uses the midpoint of the effective detection line of the laser profile sensor as the reference position for downstream overlap detection. This invention uses a calibration cable core with length markings to verify the upstream path length and the downstream path length.

[0043] Specifically, when the calibration cable core passes the upstream outer diameter detection reference position, the shielding tape wrapping reference position, and the downstream overlap detection reference position, the production controller of the present invention records the length output by the traction encoder; after three consecutive calibrations, the maximum difference in the path length obtained from the three calibrations shall not exceed the length corresponding to one pulse of the traction encoder.

[0044] It should be further noted that after the dual-axis laser diameter gauge detects the cable core to be wrapped, the corresponding cable core still needs to travel the upstream path length to reach the shielding tape wrapping reference position; in order to ensure that the outer diameter sampling values ​​of the entire production section can be collected in advance, the upstream path length should be at least equal to the sum of the production section length and the maximum conveying length within one sampling cycle.

[0045] Specifically, the production controller of the present invention multiplies the maximum traction linear speed by the sampling period of the dual-axis laser diameter measuring instrument, and the result is the maximum conveying length within one sampling period; the production controller of the present invention adds the production section length to the maximum conveying length within one sampling period, and uses the result as the minimum allowable value of the upstream path length.

[0046] The production controller of this invention reads the maximum permissible wrapping pitch from the product process document. The length of the production section is not less than 4 times the maximum permissible wrapping pitch; in this embodiment, 5 times the maximum permissible wrapping pitch is used.

[0047] The effective detection length of the laser profile sensor is not less than the sum of the production section length and 20 mm. When the production section is located in the middle of the effective detection line, each end of the production section retains a detection margin of not less than 10 mm.

[0048] S2: The outer diameter sampling value corresponds to the production section parameters.

[0049] It should be noted that the cable core to be wrapped detected by the dual-axis laser diameter gauge belongs to the material that has not yet reached the shielding tape wrapping reference position, and the outer diameter sampling value cannot be directly used for the production section currently being wrapped. At the start of formal wrapping, the cable core to be wrapped located between the dual-axis laser diameter gauge and the shielding tape wrapping reference position still has an initial length range that cannot be re-detected during formal wrapping. Therefore, this invention needs to complete the pre-collection of the outer diameter of the initial length range before formal wrapping, and use the coordinate translation method to determine the cable material coordinates corresponding to each outer diameter sampling value during formal wrapping, and then use interval assignment judgment to allocate the outer diameter sampling value to the corresponding production section. Before the corresponding production section reaches the shielding tape wrapping reference position, the production controller of this invention needs to calculate the average outer diameter of the production section, the circumference of the shielding tape centerline, and the target wrapping pitch. If the effective outer diameter sampling value is insufficient, the operation is stopped and the outer diameter is supplemented.

[0050] Specifically, the production controller of this invention enters the outer diameter pre-acquisition state, while the shielding tape wrapping device remains stationary. The track traction device drives the cable core to be wrapped through the dual-axis laser diameter measuring instrument at a pre-acquisition traction speed not exceeding 20% ​​of the formal production traction speed, and the traction encoder records the movement length of the cable core to be wrapped.

[0051] The biaxial laser diameter gauge of this invention continuously acquires outer diameter sampling values ​​in the outer diameter pre-acquisition state. When the production start mark reaches the shielding tape wrapping reference position, the track traction device stops operating.

[0052] The production controller of this invention sets the coordinates of the cable material corresponding to the production start mark to 0; the production controller of this invention converts the outer diameter sampling value saved in the outer diameter pre-collection state to the cable material coordinate range from 0 to the upstream path length according to the upstream path length.

[0053] It should be further noted that before the formal wrapping starts, the cable material coordinate range from 0 to the upstream path length should have continuous valid outer diameter sampling values, and each production segment within the corresponding range should have no less than 5 valid outer diameter sampling values. If any production segment does not meet the formal wrapping start conditions, the shielding tape wrapping device will remain stopped, and the outer diameter pre-acquisition will be re-executed.

[0054] Specifically, after the formal wrapping begins, for every pulse output by the traction encoder, the production controller of this invention adds a calibrated length increment; all length increments are accumulated to form the cumulative traction length, and the cable material coordinates corresponding to the shielding tape wrapping reference position increase with the cumulative traction length.

[0055] The production controller of this invention uses a coordinate translation method to determine the cable material coordinates corresponding to the outer diameter sampling value; the production controller of this invention adds the cable material coordinates corresponding to the shielding tape wrapping reference position at the current moment to the upstream path length, and uses the resulting coordinates as the cable material coordinates corresponding to the cable core to be wrapped when it reaches the shielding tape wrapping reference position, which is currently detected by the dual-axis laser diameter measuring instrument.

[0056] It should be noted that the cable material coordinates increase sequentially as the cable core to be wrapped passes through the shielding tape wrapping reference position; the cable core to be wrapped currently detected by the dual-axis laser diameter gauge will reach the shielding tape wrapping reference position at a later time, therefore the cable material coordinates corresponding to the outer diameter sampling value are greater than the cable material coordinates corresponding to the current shielding tape wrapping reference position.

[0057] Specifically, the biaxial laser diameter measuring instrument of the present invention acquires the outer diameter in the X and Y measurement directions; the production controller of the present invention uses the arithmetic mean method to calculate the arithmetic mean of the outer diameter in the X and Y directions at each sampling time, and uses the obtained result as the bidirectional average outer diameter at the corresponding sampling time.

[0058] The production controller of this invention calculates the absolute value of the difference between the X-direction outer diameter and the Y-direction outer diameter, and compares the absolute value of the difference with the allowable value of the outer diameter difference specified in the product process document; when the absolute value of the difference is not greater than the allowable value of the outer diameter difference, the production controller of this invention saves the bidirectional average outer diameter and the corresponding cable material coordinates as the effective outer diameter sampling value.

[0059] When the absolute value of the difference is greater than the allowable value of the outer diameter difference, the production controller of the present invention will save the bidirectional average outer diameter as an invalid outer diameter sample value; the invalid outer diameter sample value will not participate in the calculation of the average outer diameter of the production section.

[0060] Specifically, the production controller of this invention divides production into segments according to continuous cable material coordinates. Each production segment has a starting coordinate and an ending coordinate, with the starting coordinate being included within the corresponding production segment and the ending coordinate being assigned to the subsequent production segment.

[0061] The production controller of this invention uses a left-closed, right-open interval assignment rule to determine the production segment corresponding to the effective outer diameter sampling value. When the cable material coordinates corresponding to the effective outer diameter sampling value are greater than or equal to the starting coordinates of a certain production segment and less than the ending coordinates of the corresponding production segment, the production controller of this invention will assign the effective outer diameter sampling value to the corresponding production segment.

[0062] Before the corresponding production section reaches the shielding tape wrapping reference position, the production controller of the present invention reads all effective outer diameter sampling values ​​in the corresponding production section; the production controller of the present invention uses the arithmetic mean method to calculate the arithmetic mean of all effective outer diameter sampling values, and uses the calculation result as the average outer diameter of the corresponding production section.

[0063] It should be further added that the upstream path length meets the conditions for early detection of the production section. Therefore, all the outer diameter sampling values ​​of the corresponding production section have been collected before the corresponding production section reaches the shielding tape wrapping reference position. The production controller of the present invention determines whether the effective outer diameter sampling values ​​of the corresponding production section have reached 5 based on the collection results.

[0064] When there are no fewer than 5 effective outer diameter sampling values ​​for the corresponding production section, the production controller of the present invention calculates the average outer diameter of the production section using all effective outer diameter sampling values; when there are fewer than 5 effective outer diameter sampling values ​​for the corresponding production section, the production controller of the present invention calculates the remaining conveying length based on the starting coordinates of the production section.

[0065] Before the starting coordinates of the corresponding production section reach the shielding tape wrapping reference position, the production controller of the present invention stops the track traction device and the shielding tape wrapping device; the production controller of the present invention enters the outer diameter supplementary measurement state.

[0066] Specifically, the operator determines the position of the corresponding production section between the biaxial laser diameter gauge and the shielding tape wrapping reference position based on the starting and ending coordinates of the production section; the operator selects 5 equally spaced positions along the corresponding production section and measures the X-direction outer diameter and Y-direction outer diameter at each position.

[0067] The production controller of the present invention receives 5 sets of supplementary outer diameter measurements and uses the arithmetic mean method to calculate the arithmetic mean of the X-direction outer diameter and Y-direction outer diameter of each set; the production controller of the present invention uses the obtained arithmetic mean as the sampling value of the supplementary outer diameter at the corresponding position.

[0068] When all five sets of supplementary outer diameter measurements meet the allowable outer diameter difference value, the production controller of this invention calculates the arithmetic mean of the five supplementary outer diameter sampling values ​​using the arithmetic mean method, and uses the calculation result as the average outer diameter of the corresponding production section. After the average outer diameter of the production section is formed, the production controller of this invention releases the outer diameter supplementary measurement state.

[0069] When any one of the supplementary measurements of the outer diameter exceeds the allowable value for the outer diameter difference, the production controller of the present invention keeps the track traction device and the shielding tape wrapping device stopped, and the production controller of the present invention simultaneously outputs abnormal information on the outer diameter of the cable core to be wrapped.

[0070] Specifically, the production controller of the present invention writes the shielding tape width, shielding tape thickness, target overlap rate and allowable overlap width deviation corresponding to the current shielding tape reel into the corresponding production section. The production controller of the present invention adopts a proportional conversion method to multiply the target overlap rate by the shielding tape width and use the result as the target overlap width.

[0071] The production controller of this invention uses a circumference calculation method to determine the centerline circumference of the shielding strip. During the calculation, the average outer diameter of the production section is added to the thickness of the shielding strip, and the result is the diameter corresponding to the middle position of the shielding strip thickness. Then, the obtained diameter is multiplied by pi to calculate the centerline circumference of the shielding strip.

[0072] The production controller of this invention uses a difference calculation method to subtract the target overlap width from the width of the shielding strip, and the result is taken as the target axial effective width; the target axial effective width represents the distance between two adjacent shielding strips offset along the width direction of the shielding strip.

[0073] It should be further added that when the shielding tape wraps around the surface of the cable core to be wrapped once, the distance the shielding tape moves in the circumferential direction is equal to the circumference of the center line of the shielding tape, and the distance it moves in the axial direction of the cable core to be wrapped is equal to the target wrapping pitch. After unfolding the cylindrical surface of the cable core to be wrapped into a plane, the circumference of the center line of the shielding tape and the target wrapping pitch form the two legs of a right triangle, and the effective width in the target axial direction corresponds to the spacing between two adjacent turns of the shielding tape in the direction perpendicular to the direction of travel of the shielding tape.

[0074] Specifically, the production controller of this invention uses a cylindrical helix unfolding calculation method to determine the target wrapping pitch. The production controller calculates the difference between the square of the circumference of the shielding strip's centerline and the square of the effective axial width of the target, and takes the non-negative square root of the difference.

[0075] The production controller of this invention multiplies the effective axial width of the target by the circumference of the shielding strip's centerline, and then divides the resulting product by the aforementioned non-negative square root. The result is the target wrapping pitch for the corresponding production section, expressed in millimeters per revolution.

[0076] When the effective axial width of the target remains unchanged, the circumference of the centerline of the shielding strip changes, and the target wrapping pitch changes accordingly. Calculating the target wrapping pitch using the average outer diameter of the corresponding production section ensures that the target wrapping pitch is consistent with the actual size of the corresponding production section.

[0077] When the centerline circumference of the shielding strip is greater than the effective width of the target axial direction, the production controller of the present invention saves the target wrapping pitch; the production controller of the present invention uses the average outer diameter of the production section, the centerline circumference of the shielding strip, and the target wrapping pitch as the fixed production section parameters of the corresponding production section.

[0078] When the circumference of the centerline of the shielding strip is not greater than the effective width of the target axial direction, the aforementioned non-negative square root cannot form a calculation result that meets the wrapping conditions, and the shielding strip wrapping device remains stopped; the production controller of the present invention simultaneously outputs product parameter error information.

[0079] It should be further noted that when the corresponding production segment reaches the shielding tape wrapping reference position, the production controller of the present invention reads the fixed production segment parameters of the corresponding production segment according to the production segment number; when the corresponding production segment reaches the downstream overlapping detection reference position, the production controller of the present invention still reads the same fixed production segment parameters according to the same production segment number.

[0080] For example, Figure 2 This diagram illustrates the effective outer diameter sampling values ​​and the average outer diameter of each production section. The outer diameter sampling values ​​are assigned to each production section according to the cable material coordinates, and each production section retains a sufficient number of effective outer diameter sampling values. The average outer diameter of each production section changes slowly with the size of the cable core to be wrapped, retaining local discreteness, reflecting the process of effective outer diameter selection, production section assignment, and average outer diameter calculation.

[0081] S3: Recording of shielding tape wrapping operation and operating parameters.

[0082] It should be noted that the correspondence between the shielding tape wrapping speed and the traction line speed determines the actual wrapping pitch, while the target wrapping pitch is determined by the fixed production section parameters of the corresponding production section. If there is a lack of corresponding records between the traction line speed, the actual wrapping speed, and the production section, the subsequently detected actual wrapping pitch cannot be reconstructed from the operating conditions at the time of formation. In addition, after the shielding tape wrapping speed changes, it takes a certain amount of time to reach stability. The production section formed during the speed change period cannot represent the stable wrapping state before or after correction. Therefore, this invention needs to determine the initial wrapping speed based on the target wrapping pitch, record the traction line speed and the actual wrapping speed according to the cable material coordinates, and distinguish between the transition production section and the verification production section.

[0083] Specifically, the production controller of the present invention reads the target wrapping pitch of the first production segment before the first production segment reaches the shielding tape wrapping reference position; the production controller of the present invention adopts a synchronous conversion method of linear velocity and wrapping speed, divides the initial traction linear velocity by the target wrapping pitch of the first production segment, and uses the result as the initial wrapping speed.

[0084] It should be noted that the unit of traction line speed is millimeters per second, the unit of target wrapping pitch is millimeters per revolution, and the unit of the initial wrapping speed obtained by dividing the initial traction line speed by the target wrapping pitch is revolutions per second. When the initial traction line speed remains constant, the smaller the target wrapping pitch, the greater the required initial wrapping speed; the larger the target wrapping pitch, the smaller the required initial wrapping speed.

[0085] The production controller of the present invention sends the initial winding speed to the shielding tape winding driver; the shielding tape winding driver drives the shielding tape winding device to rotate according to the initial winding speed.

[0086] The shielding tape unwinding device continuously releases the shielding tape, and the shielding tape tension control device maintains the shielding tape tension within the range specified in the product process documents.

[0087] Specifically, the production controller of the present invention reads the traction encoder and the shielding tape wrapping driver at a sampling period of 0.1 seconds to 0.2 seconds. The traction encoder provides the traction linear speed, and the shielding tape wrapping driver provides the actual wrapping speed.

[0088] The production controller of this invention determines the production segment corresponding to the traction line speed and the actual wrapping speed based on the cable material coordinates at the sampling time; the production controller of this invention writes the traction line speed and the actual wrapping speed into the corresponding production segment record.

[0089] When the production section termination coordinate leaves the shielding tape wrapping reference position, the production controller of the present invention uses the arithmetic mean method to process the traction line speed in the corresponding production section; the production controller of the present invention uses the arithmetic mean of all effective traction line speeds as the average traction line speed.

[0090] The production controller of the present invention uses the arithmetic mean method to process the actual winding speed in the corresponding production section; the production controller of the present invention uses the arithmetic mean of all effective actual winding speeds as the average actual winding speed.

[0091] Specifically, after the production controller of the present invention sends a new winding speed to the shielding tape winding driver, it detects whether the actual winding speed has reached a stable condition; the actual winding speed reaching a stable condition means that the actual winding speed is kept within 1% above or below the new winding speed for 0.5 seconds.

[0092] The production controller of this invention marks the production segment formed between the start of the new wrapping speed and the actual wrapping speed reaching a stable condition as a transitional production segment. If a part of the production segment has already passed the shielding tape wrapping reference position before the actual wrapping speed reaches a stable condition, the corresponding production segment continues to be used as a transitional production segment.

[0093] When the actual winding speed reaches a stable condition, the production controller of this invention searches for the next complete production segment that passes the shielding tape winding reference position. The production controller of this invention marks the first complete production segment found as the verification production segment.

[0094] S4: Positioning of the overlap detection window and acquisition of the actual overlap width.

[0095] It should be noted that the laser profile sensor is located downstream of the shielding tape wrapping reference position. When the overlap detection result is generated, the corresponding production section has already left the shielding tape wrapping reference position. Simultaneously, the actual wrapping pitch is determined by the three boundary spacings between the four same-side overlap boundaries. These four same-side overlap boundaries may be distributed at different material locations within the overlap detection window. If the local detection coordinates are not converted to cable material coordinates, or if same-side overlap boundaries that cross the production section boundary are allowed to participate in the calculation, the obtained actual wrapping pitch cannot accurately represent the corresponding production section. Therefore, this invention requires triggering detection when the midpoint of the production section reaches the downstream overlap detection reference position, converting each same-side overlap boundary into absolute boundary coordinates, and using only the four consecutive same-side overlap boundaries located within the same production section to calculate the actual wrapping pitch.

[0096] Specifically, the effective detection line of the laser contour sensor of the present invention is arranged along the axial direction of the wrapped cable, and the downstream overlap detection reference position is located at the midpoint of the effective detection line. The present invention sets the local detection coordinate of the downstream overlap detection reference position to 0, and sets the direction of the midpoint of the effective detection line toward the shielding tape wrapping reference position as the positive direction of the local detection coordinate.

[0097] The production controller of the present invention uses the coordinate translation method to determine the coordinates of the cable material located at the downstream cover detection reference position at the current moment; the production controller of the present invention subtracts the downstream path length from the cable material coordinates corresponding to the shielding tape wrapping reference position at the current moment, and uses the resulting coordinates as the cable material coordinates corresponding to the downstream cover detection reference position.

[0098] It should be noted that the already wrapped cable at the downstream overlap detection reference position has already passed the shielding tape wrapping reference position before the current cable core to be wrapped. Therefore, the cable material coordinates corresponding to the downstream overlap detection reference position are smaller than the cable material coordinates corresponding to the current shielding tape wrapping reference position. After using the downstream path length for coordinate translation, the correspondence between the overlap detection results and the production section will not change even if the production line stops or the traction speed changes.

[0099] Specifically, the production controller of the present invention adopts a midpoint calculation method, which adds the starting coordinates of the production section to the ending coordinates of the production section, divides the result by 2, and uses the calculation result as the midpoint coordinates of the production section.

[0100] When the coordinates of the cable material corresponding to the downstream overlap detection reference position reach the midpoint coordinates of the production section, the production controller of this invention triggers the laser profile sensor; the laser profile sensor acquires the overlap detection window covering the corresponding production section, and the triggering error shall not exceed the length corresponding to one pulse of the traction encoder.

[0101] Specifically, the laser contour sensor of the present invention acquires the local detection coordinates of each same-side overlap boundary within the overlap detection window relative to the downstream overlap detection reference position; the production controller of the present invention uses the coordinate translation method to add the cable material coordinates corresponding to the downstream overlap detection reference position to the local detection coordinates of the same-side overlap boundary, and uses the obtained coordinates as the absolute boundary coordinates of the same-side overlap boundary.

[0102] It should be further noted that the positive direction of the local detection coordinates is towards the shielding tape wrapping reference position, which is consistent with the increasing direction of the cable material coordinates. Therefore, when the local detection coordinates are positive, the absolute boundary coordinates of the corresponding overlap boundary on the same side are greater than the cable material coordinates corresponding to the downstream overlap detection reference position.

[0103] The production controller of the present invention uses the left-closed and right-open interval assignment rule to determine the production section to which the same side overlap boundary belongs. When the absolute boundary coordinate of the same side overlap boundary is greater than or equal to the production section start coordinate of a certain production section and less than the production section end coordinate of the corresponding production section, the production controller of the present invention assigns the same side overlap boundary to the corresponding production section.

[0104] When the overlap detection window covers adjacent production sections simultaneously, the production controller of the present invention saves the same-side overlap boundary in each production section; the production controller of the present invention determines whether the same-side overlap boundary in each production section can form a valid boundary combination.

[0105] Specifically, when there are at least four consecutive overlapping boundaries on the same side within a corresponding production section, the production controller of this invention acquires all four boundary combinations that meet the conditions. The production controller of this invention calculates the distance between the midpoint of each four boundary combination and the midpoint of the production section.

[0106] The production controller of this invention compares all distances and selects the four boundary combinations with the smallest distances as the effective boundary combinations; the four overlapping boundaries on the same side in the effective boundary combinations should all be located between the starting coordinates and the ending coordinates of the corresponding production segment.

[0107] Specifically, the production controller of this invention arranges the four same-side overlapping boundaries in the effective boundary combination in ascending order of absolute boundary coordinates, and calculates the three boundary spacings between adjacent same-side overlapping boundaries. The production controller of this invention uses the median method, arranging the three boundary spacings according to their numerical values, and taking the median as the actual wrapping pitch for the corresponding production section.

[0108] It should be noted that the three boundary spacings all come from the continuous same-side overlap boundaries within the same production section. Therefore, the actual wrapping pitch obtained corresponds to the same production section. Using the median method can avoid the actual wrapping pitch being directly determined by a single abnormal boundary spacing.

[0109] The production controller of this invention checks the three boundary spacings in the effective boundary combination. At least two of the three boundary spacings should be within the range of 70% to 130% of the target wrapping pitch of the corresponding production section.

[0110] When at least two boundary spacings meet the corresponding range, the production controller of the present invention takes the obtained actual wrapping pitch as the valid actual wrapping pitch; when fewer than two boundary spacings meet the corresponding range, the production controller of the present invention marks the overlapping detection result of the corresponding production section as an invalid overlapping detection result.

[0111] Specifically, when the corresponding production section has an effective actual wrapping pitch, the production controller of the present invention reads the shielding tape width and shielding tape centerline circumference stored in the corresponding production section record, and the production controller of the present invention uses a cylindrical spiral unfolding calculation method to obtain the actual overlap width.

[0112] It should be further noted that when the cylindrical surface of the wrapped cable is unfolded into a plane, the circumference of the shielding tape centerline and the actual wrapping pitch form the two legs of a right triangle. The circumference of the shielding tape centerline represents the distance the shielding tape moves circumferentially when it wraps around the cable once, while the actual wrapping pitch represents the distance the shielding tape moves axially along the wrapped cable once it wraps around the cable once.

[0113] Specifically, the production controller of the present invention calculates the square of the actual wrapping pitch and the square of the circumference of the shielding strip centerline, then adds the two squares together and takes the non-negative square root of the result; the non-negative square root represents the unfolded length of the shielding strip centerline as it wraps around the surface of the wrapped cable once.

[0114] The production controller of this invention multiplies the actual wrapping pitch by the circumference of the shielding tape centerline, and then divides the resulting product by the aforementioned unfolded length. The calculation result represents the width of two adjacent turns of shielding tape that do not overlap in the width direction of the shielding tape.

[0115] The production controller of this invention subtracts the width of the non-overlapping area from the width of the shielding tape and uses the result as the actual overlap width. When the actual wrapping pitch increases, the width of the non-overlapping area increases accordingly, and the actual overlap width decreases accordingly; when the actual wrapping pitch decreases, the width of the non-overlapping area decreases accordingly, and the actual overlap width increases accordingly.

[0116] It should be further noted that the actual overlap width of the corresponding production section is calculated using the pre-saved centerline circumference of the shielding strip for the corresponding production section; other production section parameters currently being processed by the production controller of this invention are not included in the calculation of the actual overlap width of the corresponding production section.

[0117] The production controller of the present invention compares the actual overlap width of the corresponding production section with the target overlap width of the corresponding production section; when the absolute value of the difference is not greater than the allowable overlap width deviation of the corresponding production section, the production controller of the present invention marks the corresponding production section as a qualified overlap production section.

[0118] When the absolute value of the difference is greater than the allowable overlap width deviation of the corresponding production section, the production controller of the present invention will mark the corresponding production section as the overlap deviation production section.

[0119] The production controller of the present invention uses the same triggering rules for the overlapping detection window, the local detection coordinate conversion rules, the production section range determination rules, and the effective boundary combination selection rules for the verification production section; when there are fewer than 4 consecutive overlapping boundaries on the same side in the verification production section, the production controller of the present invention will re-determine the subsequent complete production section as the verification production section.

[0120] For example, Figure 3This is a schematic diagram comparing the actual and target overlap widths. In the initial production section, the actual overlap width is significantly lower than the allowable range; in the first production section, the actual overlap width is approximately 1.2 mm lower than the target overlap width. The production controller subsequently performs wrapping speed correction in the third and sixth production sections. The overlap width deviation in the seventh production section is reduced to approximately 0.4 mm, and thereafter, the actual overlap width in each production section remains within the allowable deviation range.

[0121] S5: Correction of shielding tape wrapping speed and verification of correction results.

[0122] It should be noted that when the overlap deviation production section reaches the downstream overlap detection reference position, several subsequent production sections have already formed at the shielding tape wrapping reference position. The target wrapping pitch of the overlap deviation production section may differ from the target wrapping pitch of the currently wrapping production section. If the target wrapping pitch of the overlap deviation production section is directly used to calculate the current wrapping speed, the calculation object and the execution object will be inconsistent. In addition, after the wrapping speed is issued after correction, the correction result needs to travel the downstream path length to reach the laser contour sensor. Other overlap detection results arriving during the waiting period still correspond to the production sections formed before correction. Therefore, this invention needs to use the overlap deviation production section to determine the correspondence between the actual wrapping pitch and the equipment operating parameters, use the target wrapping pitch of the currently wrapping production section to calculate the basic wrapping speed, and maintain the correction locked state until the correction result is verified.

[0123] Specifically, the production controller of the present invention reads the actual wrapping pitch, average actual wrapping speed and average traction line speed of the overlapping deviation production section; the production controller of the present invention uses a proportional conversion method to obtain the pitch corresponding coefficient.

[0124] The production controller of this invention divides the average traction line speed by the average actual wrapping speed and uses the result as the theoretical wrapping pitch of the overlapping deviation production section; the theoretical wrapping pitch represents the axial conveying length per revolution directly calculated from the traction line speed and the actual wrapping speed.

[0125] The production controller of this invention divides the actual wrapping pitch of the overlapping deviation production section by the theoretical wrapping pitch, and uses the resulting ratio as the pitch correspondence coefficient; the pitch correspondence coefficient has no unit and is used to represent the proportional relationship between the actual wrapping pitch and the theoretical wrapping pitch.

[0126] It should be further noted that when the pitch coefficient is equal to 1, the actual wrapping pitch is the same as the theoretical wrapping pitch; when the pitch coefficient is greater than 1, the actual wrapping pitch is greater than the theoretical wrapping pitch; and when the pitch coefficient is less than 1, the actual wrapping pitch is less than the theoretical wrapping pitch.

[0127] Specifically, before issuing a correction command, the production controller of the present invention reads the target wrapping pitch of the current wrapping production section and the traction line speed at the time of correction calculation; the production controller of the present invention uses a pitch ratio compensation method to obtain the basic wrapping speed.

[0128] The production controller of this invention multiplies the pitch corresponding coefficient with the traction line speed at the time of correction calculation, and then divides the resulting product by the target wrapping pitch of the current wrapping production section; the result is the basic wrapping speed, in revolutions per second.

[0129] It should be noted that, according to the actual operation correspondence determined by the overlapping deviation production section, the actual wrapping pitch is equal to the product of the pitch correspondence coefficient and the traction line speed divided by the shielding tape wrapping speed; after substituting the basic wrapping speed into the aforementioned correspondence, the predicted actual wrapping pitch is equal to the target wrapping pitch of the current wrapping production section. Therefore, the basic wrapping speed can use the actual operation correspondence obtained from historical detection to the current wrapping production section.

[0130] Specifically, the production controller of the present invention adopts a proportional correction method to determine the winding speed after correction based on the basic winding speed and the winding speed before correction; the production controller of the present invention calculates the difference between the basic winding speed and the winding speed before correction, and multiplies the obtained difference by the correction ratio.

[0131] The production controller of the present invention adds the obtained product to the wrapping speed before correction, and uses the calculation result as the wrapping speed after correction. The correction ratio is set to 0.4 to 0.7, and 0.5 is used in this embodiment.

[0132] When the base winding speed is greater than the pre-correction winding speed, the post-correction winding speed is higher than the pre-correction winding speed. When the base winding speed is less than the pre-correction winding speed, the post-correction winding speed is lower than the pre-correction winding speed.

[0133] The production controller of this invention checks the absolute value of the difference between the wrapping speed after correction and the wrapping speed before correction. The absolute value of the difference must not exceed 5% of the wrapping speed before correction, and must not exceed the allowable single speed change value of the shielding tape wrapping driver.

[0134] Specifically, the production controller of this invention sends the corrected winding speed to the shielding tape winding driver. Simultaneously, the production controller of this invention enters a correction lock state.

[0135] The production controller of this invention marks the production segment in which the winding speed after correction begins to be executed as a transitional production segment. The production controller of this invention also marks the production segment formed between the start of the winding speed after correction and the actual winding speed reaching a stable condition as a transitional production segment.

[0136] In the corrective locking state, the production controller of this invention only performs synchronous control of the traction line speed and the shielding tape wrapping speed. Other overlapping deviations that occur in the production section before the corrective results are verified are temporarily stored until the corrective results are verified.

[0137] When the actual wrapping speed reaches a stable condition, the production controller of the present invention searches for the next complete production segment that passes through the shielding tape wrapping reference position; the production controller of the present invention determines the first complete production segment found as the verification production segment, and saves the average outer diameter of the verification production segment, the center circumference of the shielding tape, the target overlap width, and the target wrapping pitch.

[0138] When the coordinates of the midpoint of the production section of the verification production section reach the downstream cover detection reference position, the production controller of the present invention obtains the actual cover width of the verification production section according to the complete coverage conditions of the production section specified in S4; if there are less than 4 consecutive same-side cover boundaries in the verification production section, the production controller of the present invention will re-determine the subsequent complete production section as the verification production section.

[0139] The production controller of the present invention compares the actual overlap width of the verification production section with the target overlap width of the verification production section; when the absolute value of the difference is not greater than the allowable overlap width deviation of the verification production section, the production controller of the present invention confirms the correction result and releases the correction lock state.

[0140] When the verification production section still exceeds the allowable overlap width deviation along the original deviation direction, the production controller of the present invention performs the second shielding tape wrapping speed correction; when the verification production section exceeds the target overlap width and exceeds the allowable overlap width deviation along the opposite deviation direction, the production controller of the present invention adjusts the correction ratio to 1 / 2 of the previous correction ratio and performs the second shielding tape wrapping speed correction.

[0141] The maximum number of automatic correction attempts in this invention is two. If the production section still exceeds the allowable overlap width deviation during the second verification, the production controller of this invention pauses automatic correction and outputs equipment inspection information. After the equipment inspection is completed, the shielding tape parameters and cable material coordinates are reacquired.

[0142] For example, Figure 4 This is a schematic diagram of the wrapping speed response after correction. In the diagram, the actual wrapping speed gradually approaches the corrected wrapping speed of approximately 2.20 revolutions per second from approximately 2.17 revolutions per second before correction, and remains within 1% above and below the corrected wrapping speed for 0.5 seconds, meeting the stability condition of the actual wrapping speed and providing a basis for selecting a complete verification production section in the future.

[0143] This completes the entire process of wrapping the shielding layer of medium-voltage power cables. By mapping the shielding tape parameters, cable core outer diameter, wrapping operation data, and overlap detection results to the corresponding production sections, the process of determining target wrapping parameters, detecting actual overlap status, correcting wrapping speed deviation, and verifying correction results is completed sequentially. This ensures that the wrapping parameters can adapt to the cable core size and production operation status, that the overlap detection results correspond to the actual wrapping sections, and that overlap deviations are corrected and confirmed in a timely manner, thereby achieving the goal of improving the consistency of the overlap status of the shielding tape of medium-voltage power cables.

[0144] This invention also discloses a medium-voltage power cable shielding layer wrapping system, including a processor and a memory. The memory stores computer program instructions. When the computer program instructions are executed by the processor, the medium-voltage power cable shielding layer wrapping method of this invention is implemented.

[0145] When the processor executes computer program instructions, it implements a parameter module, a production section matching module, a wrapping parameter module, a cover parameter module, and a correction control module. The parameter module is used to acquire the shielding tape parameters and the target cover width; the production section matching module is used to match the outer diameter sampling value and the cover boundary to the production section; the wrapping parameter module is used to acquire the target wrapping pitch based on the outer diameter sampling value and the shielding tape parameters; the cover parameter module is used to obtain the actual wrapping pitch and the actual cover width based on the cover boundary; and the correction control module is used to acquire the wrapping rotation speed after correction based on the target wrapping pitch and the actual wrapping pitch, and to acquire the correction result based on the actual cover width and the target cover width.

[0146] The system described above also includes other components well known to those skilled in the art, such as a communication bus and a communication interface. The communication bus is used to connect the processor, memory, and communication interface. The communication interface is used to transmit data with the dual-axis laser diameter gauge, laser profile sensor, traction encoder, and shielding tape wrapping driver. Their specific settings and functions are known in the art and will not be described in detail here.

Claims

1. A method for wrapping the shielding layer of a medium-voltage power cable, characterized in that, include: The continuously transported cables are divided into production sections and tracked. Implement shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section; Detect the covering status of each production section and identify production sections with covering deviations; The current wrapping control is corrected by using the actual wrapping relationship reflected in the production section of the overlap deviation. The overlapping status of the production section is detected and corrected, and the wrapping control is maintained or further corrected based on the detection results.

2. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 1, characterized in that, The process of dividing continuously transported cables into production sections and tracking them includes: The cable's transport position is characterized by the cable material coordinates corresponding to the wrapping reference position. Production sections are continuously established according to the preset section length, and the detection positions before and after wrapping are converted to cable material coordinates so that the same cable section is classified into the same production section at different detection positions.

3. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 2, characterized in that, The implementation of shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section includes: The target overlap width is determined based on the shielding tape size and the target overlap rate. The target wrapping pitch is determined based on the outer diameter of the cable core, the shielding tape size, and the target overlap width within the production section. The wrapping rotation speed is determined based on the target wrapping pitch and the traction line speed.

4. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 3, characterized in that, The implementation of shielding tape wrapping control according to the wrapping conditions and preset overlap requirements of each production section includes: Send the wrapping speed to the wrapping driver, record the traction line speed and actual wrapping speed to the corresponding production section according to the preset sampling period, and determine the average traction line speed and average actual wrapping speed based on the production section records.

5. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 4, characterized in that, The detection of the covering status of each production section includes: The same-side overlap boundary obtained from the downstream detection location is converted into cable material coordinates and assigned to the corresponding production section. The actual wrapping pitch is determined based on the distance between adjacent overlap boundaries within the same production section, and the actual overlap width is determined based on the actual wrapping pitch and the shielding tape size.

6. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 5, characterized in that, The production section for identifying overlap deviations includes: Compare the actual overlap width and the target overlap width of the same production section, and determine the production section with overlap deviation that exceeds the allowable overlap width deviation as the overlap deviation production section.

7. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 6, characterized in that, The method of correcting the current wrapping control by utilizing the actual wrapping relationship reflected in the overlap deviation production section includes: The correspondence between the actual wrapping pitch and the wrapping operation is determined based on the actual wrapping pitch, average traction line speed, and average actual wrapping speed of the production section with overlap deviation. The basic wrapping speed is then determined using the correspondence, the current traction line speed, and the target wrapping pitch of the current production section.

8. The method for wrapping the shielding layer of a medium-voltage power cable according to claim 7, characterized in that, The method of correcting the current wrapping control by utilizing the actual wrapping relationship reflected in the overlap deviation production section includes: The post-correction winding speed is determined based on the deviation between the base winding speed and the winding speed before correction, and the single winding speed variation is limited according to the preset correction range.

9. A method for wrapping the shielding layer of a medium-voltage power cable according to claim 8, characterized in that, The covered state of the production section after detection and correction includes: After sending the correction speed and maintaining the correction lock state, the complete production section formed after the actual wrapping speed stabilizes is determined as the verification production section. The actual overlap width of the verification production section is compared with the target overlap width, and the correction lock state is released or the wrapping control is corrected again based on the comparison result.

10. A medium-voltage power cable shielding layer wrapping system, characterized in that, include: The parameter module is used to obtain the shielding strip parameters and the target overlap width; The production section matching module is used to match the outer diameter sampling value and the overlap boundary to the production section; The wrapping parameter module is used to obtain the target wrapping pitch based on the outer diameter sampling value and the shielding tape parameters; The overlap parameter module is used to obtain the actual wrapping pitch and actual overlap width based on the overlap boundary. The correction control module is used to obtain the corrected wrapping rotation speed based on the target wrapping pitch and the actual wrapping pitch, and to obtain the correction result based on the actual overlap width and the target overlap width.

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