1926 results about "Cable line" patented technology

The invention relates to the technical field of communication engineering, in particular to a communication optical cable line intelligent inspection fault point rapid positioning method and device, and the method comprises the steps: obtaining optical cable line state data, constructing an intelligent fault detection model, recognizing an abnormal signal through wavelet transform and a threshold determination method, training an LSTM neural network in combination with historical fault data, and pre-judging a fault type. When a fault is detected, an unmanned aerial vehicle inspection unit is triggered, an inspection path is planned based on an improved Dijkstra algorithm according to the fault type and suspected fault area geographic information, an optical cable line is scanned and detected through a laser radar, physical fault features are recognized through a YOLOv5 algorithm, and geographic coordinates of a fault point are calibrated in combination with an inertial navigation system; and fusing sensor data and a detection result, evaluating a fault confidence level by adopting a DS evidence theory, and generating an alarm work order. Therefore, the problems of long positioning time consumption, high omission ratio, difficulty in distinguishing fault types and the like in the prior art are solved.

The invention relates to the technical field of optical cable line external force damage monitoring, and discloses an optical cable external force damage intelligent identification system. The system comprises an optical fiber vibration sensing module, a multi-source feature fusion analysis module, an abnormal event association positioning module and an intelligent checking strategy generation module. The optical fiber vibration sensing module constructs a model based on historical data and outputs a reference vibration characteristic value; the multi-source feature fusion analysis module performs three-dimensional fusion analysis of time domain, frequency domain and phase on the reference value and the measured value to generate a feature difference matrix; the abnormal event association positioning module is used for generating an abnormal probability distribution cloud picture and positioning an abnormal area in combination with the topological parameters and the environment information; and the intelligent checking strategy generation module configures checking parameters according to the cloud picture, starts high-frequency acquisition for a high-probability region, and applies an environment disturbance test to adjacent lines. The system can accurately identify and position optical cable external force damage, and the monitoring efficiency is improved.

The invention discloses a cable eccentricity online monitoring method based on multi-point laser ranging, and relates to the technical field of cable manufacturing and detection, and the method comprises the following steps: twelve laser displacement sensors are uniformly arranged at the periphery of a cable core to be detected, the sensors are arranged at fixed intervals of 30 degrees, and a closed annular monitoring array is formed; the method is used for synchronously acquiring radial distance data from the surface of the cable core to the inner wall of the insulating layer at each measuring point. Full-circumferential real-time monitoring is achieved through the high-density laser sensor array, the measurement precision is guaranteed through multi-algorithm fusion and temperature compensation, a closed-loop feedback control mechanism is formed in combination with production equipment, the problems of eccentricity detection blind areas, error interference and manual lag are effectively solved, and the quality consistency and production efficiency of cable manufacturing are improved.

The invention discloses a cable fault accurate positioning system based on an intelligent sensor system, and relates to the technical field of power fault positioning, and the cable fault accurate positioning system comprises a cloud monitoring center which is in communication connection with the following modules: a signal acquisition and processing module which is used for deploying the intelligent sensor system along a cable, operation environment data and traveling wave signals in the cable operation process are obtained, and the signals are preprocessed and stored in a cloud data warehouse. According to the invention, the front band-pass filter and the self-adaptive trap filter are combined to filter out high-frequency harmonic waves and specific-frequency interference signals, and the differential sampling technology is adopted to counteract common-mode interference, so that the signal-to-noise ratio of the signals is remarkably improved, a system can accurately capture and process weak traveling wave signals caused by a high-resistance grounding fault in a complex environment, and the fault detection accuracy is improved. Therefore, the fault positioning precision is greatly improved, the positioning error caused by signal interference is reduced, and the determination of the fault position is more reliable and accurate.

The invention provides an adaptive stochastic resonance weak fault detection method based on kurtosis optimization, and belongs to the technical field of fault detection, and the method comprises the steps: collecting and preprocessing a transient signal on a cable line; constructing a bistable stochastic resonance model; kurtosis of the output signal is used as a fitness function, and potential well parameters of the bistable stochastic resonance model are optimized based on a particle swarm optimization algorithm; and substituting the optimized potential well parameter into the bistable stochastic resonance model, and processing the preprocessed transient signal to obtain an enhanced output signal for fault detection. The method has the beneficial effects that the stochastic resonance system is constructed on the basis of the classical bistable model, the kurtosis of the output signal is used as the fitness function of the particle swarm optimization algorithm, the potential well parameters are adaptively optimized, the potential well parameters are driven to automatically converge to the optimal state, and the robustness of the system is improved. The high-impedance grounding fault traveling wave signal can be extracted and enhanced from a strong noise background, and the detection sensitivity and reliability are improved.

The invention discloses an offshore wind power cable line fault early warning method and system, and relates to the technical field of cable line fault early warning, and the method comprises the following steps: laying a three-dimensional distributed optical fiber temperature array along an offshore wind power cable, and monitoring the cable thermal field space distribution in combination with an active acoustic dispersion imaging technology; acquiring initial evolution trajectory data of the edge high-temperature region; and on the basis of the initial evolution trajectory data, constructing a coupling relationship among the ocean current parameter, the sediment disturbance characteristic and the cable heat conduction parameter, forming an ocean current-sediment-heat conduction coupled digital twin model, and dynamically correcting a virtual scene of the cable burial depth in the model through a recursive filtering algorithm. Through combination of thermal field monitoring, digital twin modeling and intelligent intervention, accurate early warning and dynamic response of offshore wind power cable faults are realized, the operation and maintenance efficiency is improved, system self-optimization and cross-scene migration are supported, and the safety and intelligent level of cable operation are significantly enhanced.

The invention discloses a cable defect detection method of a binocular intelligent inspection robot, and relates to the field of image processing, and the method comprises the steps: firstly obtaining the state information of a cable, then carrying out the preprocessing and stereo matching of the image information of the cable, and then constructing a target detection and segmentation model; the target detection and segmentation model is adopted to detect and segment cable defects, and model sample data is updated in real time in an incremental learning mode; fusing the cable state information acquired by the infrared camera, the thermal imager and the wireless sensor network by using a multi-sensor data information fusion model; the cable is maintained and managed based on a detection result; according to the invention, the detection precision and accuracy can be improved, cables of different types and specifications can be handled, the adaptability and stability are ensured, and the real-time performance and accuracy of detection can be improved.

The invention relates to the technical field of cable processing, in particular to a cable threading device and process for wire and cable processing, the cable threading device comprises a base, an insulating layer, a cable core and a cooling assembly, the cooling assembly comprises four cooling supporting plates, a plurality of cooling balls, four annular cooling pipelines and four cooling units, and the insulating layer is output from an extruder and placed above the base; the cooling supporting plate moves, so that the cooling balls cling to the insulating layer; the cooling unit is used for cooling the cooling water; cooling water flows in the cooling supporting plate through the annular cooling channel to cool the cooling ball; the cooling balls are in contact with the insulating layer to achieve a cooling and shaping effect; therefore, the cooling balls are continuously cooled through the annular cooling pipeline, then the cooling balls make contact with the insulating layer which is continuously moved and conveyed, compared with air cooling, the cooling effect is remarkably improved, spraying water does not need to be used, and the risk that the insulating layer absorbs water and is damaged or performance is reduced is avoided.

The invention provides a fault signal detection system and an analysis positioning method, and relates to the technical field of signal detection. An injection module is used for periodically applying narrowband acoustic disturbance capable of adaptively selecting frequency and power to an optical cable sheath; the passive wireless label nodes arranged along the line collect multi-dimensional data such as arrival timestamps, amplitudes, frequencies, phases, local temperatures and the like in real time, and upload the data through near-field coupling. And the convergence module completes node identification association and batch aggregation, the analysis and construction module constructs an acoustic propagation path map, and after temperature difference segmentation compensation, an actual laying path is dynamically recovered by adopting a map search algorithm. And the projection and identification module maps the map to a geographic information system coordinate system and outputs a fault space position, thereby realizing real-time and accurate optical cable fault positioning under a topology-free prior condition, remarkably reducing manual inspection and misjudgment rates, and being suitable for a multi-branch and multi-repair long-distance communication or power optical cable scene.

The invention relates to the technical field of cables, in particular to a composite low-voltage power cable. In the long-term compression and impact process of the existing cable, the cable core structure is easy to deform and damage, the resistance of a conductor is abnormally increased, and the risk of power supply interruption is obviously increased. Comprising a protective sleeve, an armor layer is installed in the protective sleeve, and a plurality of supporting blocks and a plurality of cable cores are arranged in the armor layer; the protective sleeve is provided with a plurality of first cavities distributed at equal intervals in the circumferential direction, and the first cavities are used for providing a movement range for deformation of the protective sleeve and facilitating dislocation rotation of the inner side faces and the outer side faces of the first cavities in the deformation process. According to the invention, through the movement space provided by the first cavity, the extrusion of a heavy object is buffered, and the extrusion of the heavy object is guided to be staggered, so that the impact force borne by a cable core is reduced; and through a multi-layer composite structure formed by the protective sleeve and the armor layer, the use strength of the cable is improved.

The invention discloses a cable wrapping machine with a wrapping tape gap adjustment function and a cable thereof.The cable wrapping machine comprises a wrapping machine body, a rotating disc is rotationally installed on one side of the wrapping machine body, a pay-off device and an adjusting mechanism are fixedly installed on one side of the rotating disc, and the adjusting mechanism comprises a supporting bottom plate arranged on one side of the rotating disc; a detection assembly and an abutting assembly are arranged on one side of the supporting bottom plate, the detection assembly can detect pressure on the two sides of the wrapping tape, and the abutting assembly can adjust the wrapping tape when the wrapping tape inclines. According to the technical scheme of the invention, through the arrangement of the adjusting mechanism, when a wrapping gap is generated between a wrapping tape and a cable, the detection assembly can rapidly detect the generation of the wrapping gap through the difference between the pressures applied to the two ends of the tension roller, thereby driving the abutting assembly to operate to adjust the gap of the wrapping tape. Therefore, the working efficiency of the wrapping machine and the wrapping effect of the cable are improved.

The invention relates to the technical field of cable line operation and maintenance, in particular to a cable fault diagnosis method and system based on quantum optimization variational mode decomposition and multi-scale evaluation, and the method comprises the steps: employing a quantum genetic algorithm to optimize the modal number and penalty factor of variational mode decomposition through a multi-target fitness function; constructing a multi-scale evaluation system fusing time domain, frequency domain and wavelet domain features, and screening an optimal modal component; and carrying out multi-feature fusion wave head calibration on the optimal modal component to calibrate the arrival time of the wave head, and realizing accurate positioning of a fault point in combination with a double-end traveling wave method. According to the method, the ranging error can be effectively reduced under the conditions of high transition resistance and low signal-to-noise ratio, the robustness and engineering applicability of cable fault diagnosis are improved, and the problems of attenuation distortion of fault traveling wave signals and difficulty in wave head calibration under the conditions of strong noise and high transition resistance are solved.

The utility model discloses a wear-resistant flame-retardant photovoltaic cable which is high in structural strength, good in flame retardant property, wear-resistant, corrosion-resistant and aging-resistant. Comprising a cable body, a plurality of groups of cable cores are arranged in the cable body, an anti-bending block is arranged in the center of the cable body, the cable cores are arranged around the anti-bending block in a surrounding mode, and a reinforcing sheath, a flame-retardant sheath, a wear-resistant sheath and an ultraviolet-proof layer are sequentially arranged on the outer side of the cable body. And the ultraviolet-proof layer is an ultraviolet-proof coating which is coated on the outer surface of the wear-resistant sheath.

The invention discloses a high-voltage cable line parameter extraction method and system based on online monitoring. The high-voltage cable line parameter extraction method comprises the steps of listing a multi-conductor transmission line equation containing a relation between voltage phasors and current phasors at the two ends of a cable based on a multi-conductor transmission line theory; multiple groups of cable operation data are collected at the two ends of the cable, and moments with different load amplitudes are selected for each group of cable operation data; reducing orders of a chain parameter matrix in the multi-conductor transmission line equation and the voltage phasor and the current phasor of the head end of the cable to obtain a multi-conductor transmission line equation after order reduction; substituting the acquired cable operation data into the multi-conductor transmission line equation after order reduction, and solving a chain parameter matrix after order reduction through matrix operation; and solving the length of the cable line by using the chain parameter matrix and the chain parameter matrix after order reduction. According to the method, the calculation precision of the theoretical value of the sheath circulating current is improved, and the misjudgment rate and the missed judgment rate based on online diagnosis of the sheath circulating current are reduced.

The invention relates to the field of power systems, in particular to a power cable cross interconnection grounding system live-line maintenance method and system. The method comprises the following steps: firstly, synchronously acquiring cable line load current, three-phase grounding ring current and grounding resistance at the head end and the tail end of a metal sheath of a crossed interconnection unit with ring current abnormity, and generating a real-time data set with a timestamp; extracting cable structure parameters based on a preset cable topology database, and dynamically associating the cable structure parameters with the real-time data set; constructing a multi-conductor transmission line equation model, calculating a theoretical circulation distribution value of each section of sheath, and generating a theoretical circulation map; carrying out matching analysis on the theoretical circulation map and actually measured circulation data, and determining defect types and positions; and finally, according to a defect positioning result, the maintenance operation is executed in an electrified state through the insulating mechanical arm, and the stability of the grounding impedance of the system is maintained through the bypass grounding device. The problems that in the prior art, the live detection function is incomplete, and defects cannot be rapidly and accurately positioned are solved.

The invention discloses a cable early fault rapid detection method based on finite element analysis, and relates to the technical field of cable fault detection, and the technical scheme is characterized in that the method comprises the following steps: marking a cable line section with an insulation performance abnormal condition as a to-be-detected section, and selecting a main detection cable section and an auxiliary detection cable section from the to-be-detected section; according to the historical fault feature data and the to-be-detected insulation parameter data of the main detection cable section, performing fault type judgment on the main detection cable section to obtain a main detection fault type judgment result; processing and analyzing the main detection cable section, the auxiliary detection cable section and the historical fault feature data, and then formulating a first fault detection scheme; and a second fault detection scheme is formulated after the main detection fault type judgment result and the main detection cable section are processed and analyzed, so that various faults existing in different sections can be effectively handled, and the detection comprehensiveness is guaranteed.

The invention relates to the technical field of cable processing, in particular to a cutting device for cable production, which comprises a processing table, two fixed seats are symmetrically arranged on the processing table, a plurality of fixed conveying shafts are rotatably connected to the fixed seats, movable conveying shafts are arranged on the fixed seats, and a fixed frame is fixedly connected to the processing table. The fixed frame is provided with a cut-off tool, one side of the cut-off tool is provided with an adjusting mechanism, the fixed frame is rotatably connected with a swing seat, the swing seat is slidably and cooperatively provided with a section processing seat, and the section processing seat is rotatably connected with a transmission mechanism. By arranging the two adjustable limiting rings and the adjustable movable conveying shaft on the fixed conveying shaft, when the flat cables of different sizes are cut off, the flat cable conveying device is suitable for accurately positioning and conveying the flat cables, the flat cables are prevented from deviating or being twisted in the conveying and cutting-off process, and the machining precision and quality of products are guaranteed.

An aircraft wing having a fixed wing and a moveably mounted wing tip device is disclosed. A first cable harness and a second cable harness which are received in a protective sleeve extend between the fixed wing and the wing tip device. The protective sleeve is in a secured configuration in which at least two opposing parts of the protective sleeve are secured together between the first cable harness and the second cable harness to provide the sleeve with a first channel in which the first cable harness is received a second channel in which the second cable harness is received, and a webbing region extending between the first channel and the second channel such that the first and second cable harnesses are held apart by the webbing region.

The utility model relates to a cable stripping device for electric power engineering. Comprising a second mounting frame and a first mounting frame, and a clamping assembly is mounted on the first mounting frame; the clamping assembly comprises two sets of clamping jaw mechanisms and further comprises a clamping driving mechanism. A plurality of groups of sliding guide rods are fixedly connected to the second mounting frame, and a movable frame structure which is in sliding connection with the second mounting frame is arranged on the second mounting frame in a penetrating manner; a cutting assembly is mounted on the movable frame structure; the cutting assembly comprises a cylindrical shell structure, two groups of cutting mounting rods are elastically mounted in the cylindrical shell structure, a peeling cutter is mounted at the outer end part of each cutting mounting rod, and a limiting plate is mounted at the outer end part of each cutting mounting rod; the cutting adjusting mechanism is used for adjusting the distance between the two groups of cutting mounting rods; and an annular cutting driving assembly is mounted on the movable frame structure. According to the utility model, rapid girdling and peeling operation can be carried out on cables with different diameters, the cutting depth of the cutter can be adjusted according to the specifications and dimensions of the cables, the universality is strong, the peeling effect is good, and the cable girdling and peeling device has the advantages of convenient operation, time and labor saving, and wide application range.

The invention discloses an intelligent wire harness detection system, and relates to the technical field of wire harness detection, and the system comprises a data collection module which completes the collection and uploading of to-be-detected data according to the planning condition of a to-be-detected wire harness planning module; the wire harness test module at least comprises a conduction test unit, an insulation test unit and a withstand voltage test unit, and the units are respectively used for completing corresponding test items according to the to-be-tested data; the power supply management module is used for power supply control and test signal generation control; and the test management module is used for memorizing the mapping relation between the system test channel and the tested wire harness and controlling the wire harness test module to complete related test functions. The system has a self-learning capability, can complete the detection of the connection relation of unknown cable harnesses, and achieves the automatic detection of the to-be-detected harnesses.

The invention discloses a ring main unit cable line fault positioning system and method based on traveling wave intelligent sensing, and relates to the technical field of ring main unit cable line fault positioning, and the method comprises the following steps: arranging a traveling wave sensor at a position corresponding to a cable connecting plug or a solid-sealed polar pole in a ring main unit; an initial correction stage is carried out, a known electrical event is triggered on a cable in actual operation, the propagation time of a traveling wave signal between the two ends is measured, and the wave velocity of the traveling wave is actually measured on site and dynamically updated in combination with the known cable length; the method comprises the following steps: executing initial correction under different operation conditions, collecting corresponding data of working conditions and wave velocities, constructing a self-adaptive model of the wave velocities and working condition parameters, and when a fault occurs, dynamically predicting the wave velocities based on the constructed model according to current working condition parameters monitored in real time; and on the basis of the identified wave head timestamp, constructing an overdetermined equation set and solving an optimal fault position, so that the cable line fault positioning of the ring main unit is realized.

The invention relates to the technical field of cable line operation and maintenance, in particular to a cable fault accurate positioning method and system based on electromagnetic time reversal correction. And in combination with a reflection coefficient correction and local energy extraction method in a time inversion process, the problems that the fault traveling wave signal is attenuated and distorted under strong noise and high transition resistance, and the EMTR positioning effect is influenced by fault resistance are solved. Constructing a multi-scale evaluation system fusing time domain, frequency domain and wavelet domain features, and screening an optimal modal component; and constructing an actual fault resistor in a reverse phase of the EMTR to correct a reflection coefficient, and providing a criterion for positioning by using local energy at a first traveling wave to realize accurate positioning of a cable fault. According to the method, the ranging error can be effectively reduced under the conditions of high transition resistance, low signal-to-noise ratio and unknown fault resistance, and the robustness and engineering applicability of cable fault diagnosis are improved.

The invention belongs to the technical field of electrical system loops, and relates to a system loop matching design method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining load parameters in a system loop; calculating a load current according to the load parameter; according to a load current, selecting a fuse, defining a temperature resistance grade, and selecting a cable diameter; according to the selected fuse, the defined temperature resistance grade and the selected cable diameter, performing overcurrent matching checking, judging whether the overcurrent matching checking is passed or not, and if yes, performing temperature rise checking; judging whether the temperature rise checking is passed or not, and if so, checking the fuming time; and judging whether the verification of the fuming time is passed or not, and if so, carrying out electrical performance test confirmation. Multiple aspects such as electrical element performance, environmental factors and frequency factors are comprehensively considered, and the accuracy and reliability of the high-voltage system in the design process are ensured; failure risks can be effectively avoided, the safety and stability of the system are improved, and powerful support is provided for electric development of automobiles.

The invention relates to the technical field of cable fault detection, and discloses a high-voltage single-core cable line fault efficient positioning method, fault traveling wave current signals are collected in real time through a synchronous detection device, and the synchronous detection device comprises a Beidou / GPS dual-mode high-precision time service module; a dynamic wave velocity calibration algorithm is adopted, and the traveling wave propagation velocity of a current cable monitoring point is calculated through the cable conductor temperature Tc, the environment temperature Te and the conductor current load I which are collected online in real time; constructing a dynamic wave velocity curve for the traveling wave propagation velocity of each cable monitoring point according to a time sequence, comparing the dynamic wave velocity curve with a dynamic wave velocity standard curve, and dividing the cable monitoring points into normal monitoring points and abnormal monitoring points; the abnormal monitoring points are processed to obtain the fault concentration points and the fault outburst points of the abnormal monitoring points, and the cable line fault degree is identified based on the number of the abnormal monitoring points and the abnormal degree, so that the accuracy is high.

The invention relates to a DAS signal positioning method based on adaptive tensor decomposition and dynamic correction. The method comprises the steps of converting phase difference data into strain rate data, constructing a three-dimensional tensor based on a time domain signal of a space point, solving an optimization problem after constraint modeling, and extracting a de-noised DAS signal. Calculating an initial fault position, and calculating an actual optical path and an apparent position after temperature change based on a thermal expansion effect and a thermo-optic effect; and a dynamic correction algorithm is set, a system coordinate reference is adaptively calibrated, and a final positioning result is calculated. According to the method, original signals are separated into a low-rank background field, a sparse event field and a structured noise field through unsupervised tensor decomposition, and the defects of dependence on labeled data and insufficient complex noise separation are overcome; by establishing a temperature-optical path coupling physical model and a dynamic correction algorithm for real-time cross-correlation calibration, positioning drift caused by environmental factors is accurately compensated, and high-fidelity denoising and accurate positioning of cable line events in a complex environment are realized.

The utility model relates to the technical field of split type encoders, in particular to a split type photoelectric angle encoder and a matched tool, the reading head of the encoder and the end face of a grating disc are respectively provided with at least two positioning pin holes, and a photoelectric module in the reading head is mechanically limited through a groove. The cable is combined and fixed through the positioning ball and the wire harness binding belt, so that the use of a structural adhesive in the production process is reduced, the production cost is reduced, and the production efficiency and the maintainability and interchangeability of the product are improved. In the debugging process before leaving the field, the positions of the reading head and the grating disc are relatively fixed by using a matched tool, so that the problem that the positions of the reading head and the grating disc need to be subjected to secondary adjustment during use by a customer is avoided.

The invention discloses a pilot protection method for an offshore wind power low-frequency cable outgoing line, and belongs to the technical field of power system relay protection, the pilot protection method comprises the following steps: determining a voltage break variable according to acquired voltage information on two sides of a low-frequency cable line, and when the voltage break variable is greater than a preset rated voltage, starting protection and carrying out fault state judgment; according to the maximum value and the minimum value of the current of the current information of the two sides of the low-frequency cable line in the same data window, probability distribution of the current of the two sides of the low-frequency cable line is determined, and a divergence value K of the probability distribution is obtained; comparing the divergence value K value with a setting threshold value, and determining the types of internal and external faults of the low-frequency cable line; and executing corresponding protection operation according to the fault judgment result. According to the method, the current probability distribution difference of the two sides of the low-frequency cable line is extracted, the K-L divergence value K is calculated, and the protection criterion is constructed to perform internal and external fault judgment, so that the accuracy of the judgment result is improved, and the corresponding protection operation is quickly executed.

The invention discloses a cable harness detection device for a new energy automobile, and belongs to the technical field of harness detection. The device is composed of a fixing mechanism, a tensioning mechanism, a bending mechanism, a torsion mechanism, a detection module and a control system. Through a pneumatic self-adaptive clamping structure and an elastic tensioning mechanism, stable fixation and constant tensioning of the wire harness are realized; the servo driving push rod and the rotatable mounting plate can simulate bending in multiple directions; the three-jaw chuck type torsion mechanism realizes low-speed and high-torque reciprocating torsion; the detection module integrates electrical performance detection and infrared temperature sensing, and monitors the conduction state, resistance, insulation strength and temperature rise in real time; the control system realizes automatic control of bending, torsion and composite loading based on a PLC, and can be connected with an upper computer or a cloud platform to realize data uploading and life curve analysis. The device can truly simulate the complex working condition of the vehicle, and improves the detection precision and reliability.

The utility model discloses a device for preventing water leakage of a pipe opening of an electric power pipe well, and belongs to the technical field of water seepage prevention construction.The device comprises the electric power pipe well, an embedded pipe is embedded in the outer wall of one side of the electric power pipe well, a cable is arranged in the embedded pipe, and a well lid is placed at the top of the electric power pipe well; a limiting block is arranged at the position, below the well lid, in the electric tube well, and limiting grooves are symmetrically formed in the positions, on the two sides of the limiting block, of the inner wall of the electric tube well; according to the electric power tube well, the limiting groove is formed, the adjusting block and the limiting block are limited and fixed in the electric power tube well, then the well lid, the waterproof cover and the extrusion block can be sequentially connected to the connecting rod in a sleeving mode, the waterproof cover can be clamped to the top of the electric power tube well by screwing the fixing ring, and therefore the connecting position of the electric power tube well and the well lid is sealed; part of rainwater is prevented from flowing into the power tube well from a gap between the power tube well and the well lid, so that it is ensured that the cable is in a safe environment, and the cable is prevented from being damaged.

The invention relates to a cable take-up and pay-off device which comprises a bottom plate and further comprises a bearing seat fixedly arranged in the middle of the bottom plate, a shell is arranged on the outer side of the bearing seat, and bearing rollers are symmetrically and rotationally arranged in the shell; the wire coil is placed above the bearing seat, and an inner hole is formed in the middle of the wire coil; the driving part comprises a driving motor and a side plate, the driving motor is fixedly arranged on the upper side of the bottom plate, a driving belt wheel is rotationally arranged in the side plate, a side belt wheel is arranged on the outer side of the driving belt wheel, and a first transmission belt is arranged between the driving belt wheel and the output end of the driving motor; a driving shaft is arranged in the middle of the driving belt wheel in a clamped mode and matched with the inner hole. According to the device, the cable can be uniformly and orderly guided and wound on the wire coil in the winding process, the problems of lap winding, disordered winding, clamping stagnation and the like of the cable are effectively avoided, and the take-up efficiency and uniformity are greatly improved.