21 results about "Direct-buried cable" patented technology

The invention discloses an underground cable vibration deformation monitoring and fault positioning device and method, in the embodiment, the device is fixed on an outer sheath of an underground cable directly buried, a cable trench, a cable tunnel and the like through a fixing module, and the cable outer sheath is used as a platform for fixed installation; the monitoring module in the device can be tightly attached to the surface of the outer sheath of the cable to monitor vibration or deformation generated when the cable is impacted by external force. The data processing module can read information of the monitoring module in real time, and if abnormal information is found, the signal and an equipment number are sent to a rear end through the communication module to be recognized, processed and calculated, so that the functions of abnormal external force impact recognition and fault positioning are achieved.

A low-voltage sheet-shaped conductor fireproof bus relates to the field of power transmission and distribution. The low-voltage bus duct is mainly designed for solving the problems that an existing low-voltage bus duct is low in conductor utilization rate and cannot safely operate in special environments such as direct burial and cable trenches. The cable comprises a thin-plate-shaped copper conductor, an insulating layer and a non-magnetic metal protective shell. An insulating layer is covered outside the thin-plate-shaped copper conductor, that is, the insulating layer is covered on other surfaces except for terminals used for being connected with other equipment at the end part of the conductor, and a non-magnetic metal protective shell is arranged outside the insulating layer. The cable has the advantages of higher heat dissipation performance, higher conductor utilization rate and more reliable safety, and can simultaneously meet the requirements of fire prevention, flame retardance and operation conditions in special environments such as direct burial and cable trenches.

The embodiment of the application discloses a dynamic current-carrying capacity prediction method of a direct-buried cable and related devices, and the method comprises the following steps: obtaining historical weather data and historical cable load current of a direct-buried cable in a historical time period in a preset area; the historical weather data comprises historical ground temperature and historical precipitation; determining soil dynamic characteristic parameters based on the historical ground temperature and the historical precipitation; determining the historical dynamic current-carrying capacity of the direct-buried cable based on the soil dynamic characteristic parameters and the historical cable load current; obtaining future weather data and future cable load current of the preset area in a future time period; determining a target quantile point; determining a regression coefficient vector corresponding to the target quantile point based on the target quantile point, the historical weather data, the soil dynamic characteristic parameters, the historical dynamic current-carrying capacity and the historical cable load current; and determining the future dynamic current-carrying capacity of the direct-buried cable corresponding to the target quantile point in the future time period based on the future weather data, the future cable load current and the regression coefficient vector.

The application relates to the technical field of electric variable measurement, and discloses a direct-buried cable operation and maintenance safety risk dynamic evaluation and early warning method based on multi-source data fusion. The method comprises the following steps: acquiring multi-source monitoring signals; adopting wavelet denoising and windowed interpolation Fourier transformation on a synchronous sampling sequence to extract fundamental wave and harmonic characteristic parameters; based on the characteristic parameter set, resistance and capacitive leakage currents are separated online through time delay compensation and forgetting factor recursive least squares; a multi-dimensional feature vector is constructed from the separation result, and hierarchical early warning is realized in combination with dynamic threshold feedforward control; according to the early warning result, the comprehensive risk is evaluated by using an entropy weight method and D-S evidence theory fusion, and operation and maintenance decision suggestions are obtained. Due to the step-by-step connection of synchronous sampling, feature extraction, leakage current separation, hierarchical early warning and evidence fusion, dynamic evaluation and risk early warning of the insulation state of the direct-buried cable are realized, and the reliability of the operation and maintenance safety decision is improved.

The present invention provides a cable laying device, including a supporting mechanism, a distributing mechanism, a laying mechanism and a sand filling mechanism. The distributing mechanism is arranged at the front side of the supporting mechanism. The distributing mechanism includes a distributing member and a pressing ball. The pressing ball is arranged on the central axis of the distributing member and is located at the bottom of the distributing member. The distributing member is used to distribute the sand layer to both sides to form a cable trench. The pressing ball is used to press out a slot for laying the cable in the cable trench. The laying mechanism is arranged at the middle part of the supporting mechanism and is used to unwind the cable into the slot. The sand filling mechanism is arranged at the rear side of the supporting mechanism and is used to fill the sand layer distributed to both sides into the cable trench to cover the cable after the laying mechanism unwinds the cable into the slot. During the movement, the distributing member is used to divide the sand layer in the cable trench. The pressing ball reserves a laying slot for the cable. The cable is laid in the cable trench by the laying mechanism. The sand filling operation is automatically completed after the cable is laid, thereby reducing the laying process of the direct buried cable, eliminating the need for manual sand filling, and improving the laying efficiency.

The invention relates to the technical field of cable insulation performance detection, in particular to a power cable insulation performance comprehensive testing device and a testing method.The power cable insulation performance comprehensive testing device comprises a support, the support is connected with a testing bin used for containing a cable to be tested through a rotating assembly, and the testing bin is slidably connected with a sealing frame cover in an inserted mode through a driving assembly; the sealing frame cover is provided with a simulation assembly for simulating the actual working condition of the directly-buried cable, and the backfill soil gathers in the sealing frame cover under the action of gravity during inversion, so that the cable to be tested can be filled after the sealing frame cover is separated through the driving assembly; after the test chamber is upright, the backfill soil automatically slides into the test chamber under the action of gravity and burns the cable, so that the actual laying environment of the direct-buried cable is simulated, and on the basis, vibration is conducted to the backfill soil through the vibration assembly and alternating pressure stress is applied to the backfill soil through the extrusion assembly, so that the direct-buried cable is tested. Therefore, the comprehensive test of the insulation performance of the cable can be carried out under a highly simulated direct burial working condition.

The invention discloses a complex environment direct burial power cable with a conductor built-in micro-channel cooling function, and belongs to the technical field of power cables. Comprising a conductor, a liquid cooling pipe, an isolation sleeve, an armor layer, an outer sheath layer and a nylon sheath layer. The conductor and the liquid cooling pipe are arranged in the isolation sleeve; the armor layer is arranged on the outer side of the isolation sleeve; the outer sheath layer is arranged on the outer side of the armor layer, and the nylon sheath layer is arranged on the outer side of the outer sheath layer; the conductor comprises a conductor monofilament; the conductor monofilament is provided with a spiral groove, and a micro-flow tube is arranged in the spiral groove. The cable solves the problems that the current-carrying capacity of a directly-buried cable is difficult to improve and fire disasters occur easily, improves the current-carrying capacity, and is environment-friendly and flame-retardant

The application provides a flexible sealing structure for underground directly buried cable or optical cable wall penetration and a construction method. The structure comprises a wall penetration protection pipe and a flexible sealing assembly arranged between the wall penetration protection pipe and the cable or optical cable. The flexible sealing assembly is arranged at least on the water side of the wall penetration protection pipe and comprises a long pipe clamp, a flexible sealing element arranged in the long pipe clamp and an end locking gland arranged at the end of the long pipe clamp. A threaded adjusting stop ring is arranged in the long pipe clamp, and the flexible sealing element is arranged between the threaded adjusting stop ring and the end locking gland. The flexible sealing element forms a static seal with the sealing surface of the wall penetration protection pipe and the cable or optical cable. The flexible sealing assembly with a pre-pressing and pre-tightening adjusting mechanism is arranged between the cable or optical cable and the wall penetration protection pipe, realizes the functions of radial bidirectional positioning and axial side bidirectional positioning, makes the sealing ring group in the sealing cavity be in three-way extrusion stress, forms a static sealing zero space between the wall penetration protection pipe and the cable or optical cable, and thus achieves the waterproof sealing effect.

The utility model discloses a kind of wind farm direct-buried cable power collection line fault positioning systems, including wind farm centralized monitoring server, line monitoring server, signal transmission module, data processing module, fault positioning module, pulse generator, the wind farm centralized monitoring server and line monitoring server are installed in booster station control room, signal transmission module, data processing module and fault positioning module are integratedly installed in the inside line monitoring server, the beneficial effect generated by the utility model is as follows: this cable line fault positioning system is easy to operate, degree of automation is high, it is convenient for wind farm operation and maintenance personnel to operate, after the fault of wind farm direct-buried cable power collection line, the fault point can be positioned quickly and reach fault point to overhaul, save operation and maintenance personnel along line investigation time, effectively improve direct-buried cable line fault point positioning overhaul efficiency.

The utility model provides an abrupt slope directly-buried cable laying tool, which relates to the technical field of cable laying and comprises a main body integrally arranged in an arc-shaped frame structure. The mounting assembly is arranged on one side of the main body and is used for being matched with the main body to be mounted on the ground to directly buy and fix the cable; and the auxiliary assembly is arranged in the mounting assembly and used for being matched with the mounting assembly to conduct auxiliary fixing on the surrounding ground in the mounting process so as to improve the mounting stability. According to the tool, through cooperation of the mounting assembly and the auxiliary assembly, auxiliary fixing is conducted from the two sides in the mounting process, then main fixing bolts are prevented from being loosened due to shaking in the traction using process, the mounting stability can be improved, the mounting flexibility of the device can be improved through cooperation of the diversified and applicable mounting assemblies and gaskets, and the practicability is high. Meanwhile, the installation stability is improved and the cable is prevented from being damaged and loosened.

The present application relates to the technical field of cable insulation performance detection, in particular to a power cable insulation performance comprehensive testing device and testing method, comprising a support, a test bin for placing the cable to be tested is connected to the support through a rotating assembly, a sealing frame cover is slidably inserted on the test bin through a driving assembly, a simulation assembly simulating the actual working condition of the direct buried cable is arranged on the sealing frame cover, backfill soil is gathered in the sealing frame cover under the action of gravity when the present application is inverted, and the cable to be tested can be filled after the sealing frame cover is separated by the driving assembly; after being placed upright, the backfill soil automatically slides into the test bin under the action of gravity and buries the cable, thereby simulating the actual laying environment of the direct buried cable; on this basis, the vibration assembly transmits vibration to the backfill soil, and the extrusion assembly applies alternating stress to the backfill soil, thereby comprehensively testing the insulation performance of the cable under the highly simulated direct buried working condition.

The present invention is applicable to the field of data processing technology, and provides a method, device, terminal and storage medium for predicting the cable core temperature of a direct buried cable. The method includes: establishing a finite element simulation model of a target direct buried cable; applying a varying current carrying capacity to the finite element simulation model according to different typical daily loads in the area where the target direct buried cable is located, and obtaining the simulated temperature data of the target direct buried cable under the varying current carrying capacity, which is recorded as the first training set; training the long short-term memory model optimized by the Gray Wolf according to the first training set, and obtaining a cable core temperature prediction model for the target direct buried cable; obtaining a cable core temperature prediction value of the target direct buried cable according to the measured cable core temperature data of the target direct buried cable and the cable core temperature prediction model. The present invention can obtain a more accurate cable core temperature prediction value of the target direct buried cable, and thus reflect the actual cable core temperature of the target direct buried cable in real time.

The utility model discloses a mountain directly-buried cable protection device, relates to the field of cable laying protection materials, and aims to solve the problem of poor long-term protection of a cable trench to a cable in the prior art by matching a cable trough with a multi-stage fine sand protection layer and a protection plate. The structure state can be kept for a long time after burying, the multi-stage fine sand protection layer and the protection plate can effectively buffer and protect the cable at the bottom of the cable trough, and the problem of damage caused by external rolling and impact is reduced; and the cross section of the through groove is trapezoidal, so that the stability of the whole structure is enhanced, and the device can better adapt to mountain terrains and resist stress generated by terrain changes.

The application provides an obstacle-avoiding direct-buried cable detection device, which comprises a moving module, an obstacle-avoiding module and a detection module; the moving module, the obstacle-avoiding module and the detection module are sequentially fixedly connected; the moving module is used for moving the device to the direct-buried cable to be detected; the obstacle-avoiding module comprises a visual unit and an obstacle-avoiding mechanism; the visual unit is used for acquiring the surrounding obstacle information so as to generate or input the movement instruction for avoiding the obstacle in the device; the obstacle-avoiding mechanism is used for moving the detection module according to the movement instruction so as to avoid the obstacle and complete the detection of the direct-buried cable, and the moving mode at least comprises rotation and stretching in a horizontal plane and lifting in a vertical plane. The obstacle-avoiding direct-buried cable detection device provided by the application can be shot by the visual unit, combined with the rotating, stretching and lifting actions of the obstacle-avoiding module, so that the detection module successfully avoids the obstacle and reaches any angle and position for detection, thereby improving the precision and operation efficiency of the direct-buried cable detection.

The invention discloses direct-buried cable laying equipment for a current collection circuit of a wind power plant, and relates to the technical field of cable laying. The wind power plant current collection line direct-buried cable laying equipment comprises a rack, a soil drilling mechanism and a burying mechanism, the soil drilling mechanism comprises an opening base plate and a hydraulic cylinder, a driver is fixedly installed at the telescopic end of the hydraulic cylinder, and a soil breaking drill cone is installed at the output end of the bottom of the driver; a guide square column is fixedly installed at the position, close to the hydraulic cylinder, of the side of the top of the driver, a cleaning assembly is installed at the position, close to the driver, of the bottom of the opening base plate, the burying mechanism comprises a connecting frame and a scraping plate, a rolling wheel is installed at the bent position of the surface of the scraping plate in a rolling mode, and a protruding block is fixedly connected to the outer circle face of the rolling wheel. And a wire pressing assembly is mounted at the top of the scraping plate and close to the ditching mechanism, so that the purpose of pretreatment is achieved, land can be pretreated, subsequent ditching and burying are facilitated, and the cable laying effect is good.

The present application discloses a wind farm line fault monitoring and early warning method and system, which relates to the field of line fault monitoring. The method includes monitoring the current and voltage values ​​of the line to obtain a numerical fluctuation curve, and making a first judgment on the line fault according to the numerical fluctuation curve; calculating the power loss of the power generation of the generator set and the transmission amount of the collector line, and making a second judgment on the line fault according to the power loss; acquiring images of the laying area of ​​the direct buried cable according to the judgment result to obtain regional image data; dividing the regional image data according to the pre-buried path to obtain multiple image blocks; analyzing the image blocks to obtain first fault image data with suspected fault points; comparing and analyzing the multiple image blocks to obtain second fault image data with suspected fault points; analyzing the fault image blocks according to the numerical fluctuation curve and the power loss to determine the fault point. The present application has the effect of improving the efficiency of line fault detection.

The invention, which relates to the cable fault positioning field, discloses a direct-buried cable fault positioning inspection trolley comprising a bottom plate, a controller, a detection cabin, a camera and a telescopic paint spraying mechanism. Crawler wheels are arranged on two sides of the bottom plate to drive the bottom plate to advance, a detection bin in a middle hollow guide groove is close to the ground through a lifting cylinder, and an internal turntable is driven by a gear rack mechanism driven by a telescopic cylinder to rotate, so that an eccentrically mounted electric field sensor probe performs wave-shaped scanning to detect abnormity of an electric field around a cable. The positioning module obtains the longitude and latitude of a fault point in real time, the camera collects on-site images, and data are uploaded to a remote monitoring center through the wireless communication module. After the fault is confirmed, the telescopic motor drives the crank support arm to drive the electric sprayer to spray fluorescent paint marks. According to the device, full-process automation of'detection-positioning-marking 'is realized through cooperation of multiple components, and the fault detection efficiency and the intelligent level of the buried cable are remarkably improved.

The invention relates to the technical field of electric power system and soil heat and humidity coupling analysis, and discloses a method for analyzing moisture migration in soil around a buried cable, which considers mutual coupling of three physical fields, namely an electromagnetic field, a temperature field and a humidity field, and constructs an electromagnetic-heat-humidity multi-physical field coupling simulation model of the buried cable. And analyzing the influence of moisture migration in the soil on the running state of the buried cable. The problem that the running state of the buried cable is difficult to accurately reflect due to lack of dynamic analysis of water migration in the prior art is solved.

The invention relates to the technical field of constructional engineering installation, in particular to a full-automatic directly-buried cable laying device which comprises a truck, a control system, a hoisting system, a material preparation system, a ditching and laying system and a sand filling system. The control system is arranged in a cab of the truck, the hoisting system and the material preparation system are respectively arranged in a compartment of the truck, and the ditching and laying system and the sand filling system are respectively arranged on the rear side of the compartment of the truck; the control system is electrically connected with the hoisting system, the ditching and laying system and the sand filling system, and control over the hoisting system, the ditching and laying system and the sand filling system is achieved. The hoisting system is used for hoisting and carrying a heavy cable reel and / or fine sand; the material preparation system is used for placing cables and fine sand; the ditching and laying system is used for digging ditches in soil and laying cables; the sand filling system is used for fine sand filling after cable laying. All procedures of laying the buried cable are integrated, integrated automatic construction is realized, and the construction efficiency and quality are improved.

The embodiment of the invention discloses a method for predicting the dynamic current-carrying capacity of a buried cable and a related device. The method comprises the following steps: acquiring historical weather data and historical cable load current which are related to the buried cable in a preset region and are in a historical time period; the historical weather data comprises historical surface temperature and historical precipitation; determining soil dynamic characteristic parameters based on the historical surface temperature and the historical precipitation; determining the historical dynamic current-carrying capacity of the buried cable based on the soil dynamic characteristic parameters and the historical cable load current; acquiring future weather data and future cable load current of the preset region in a future time period; determining a target quantile; determining a regression coefficient vector corresponding to the target quantile based on the target quantile, the historical weather data, the soil dynamic characteristic parameters, the historical dynamic current-carrying capacity and the historical cable load current; and based on the future weather data, the future cable load current and the regression coefficient vector, determining the future dynamic current-carrying capacity corresponding to the target quantile of the buried cable in the future time period.