56 results about "Direct-buried cable" patented technology

The invention discloses a buried cable laying device, and mainly relates to the technical field of electric power construction. The buried cable laying device comprises a vehicle frame, the vehicle frame is provided with a pay-off rack, the pay-off rack is provided with a plurality of spools, the top of a first support frame is provided with a hub, a support arm is provided with a guide frame, the vehicle frame is provided with a plurality of threading holes, a second support frame is provided with a tensioning rack, the bottom of the vehicle frame is provided with a rotation hydraulic cylinder, the rotation hydraulic cylinder is provided with a rotating arm, the rotating arm is provided with a U-shaped frame, the U-shaped frame is provided with rolling wheels, the vehicle frame is provided with a box body, the bottom of the box body is provided with a cloth-sand pipe, the bottom of the cloth-sand pipe is provided with a telescoping pipe, the lower part of the telescoping pipe is provided with a scraper frame, and the scraper frame is provided with a smoothing scraper. The beneficial effects of the buried cable laying device are that laying and sand filling of the buried cable can be accomplished, a lot of manpower resources can be saved, the workload of construction personnel can be reduced, and the construction efficiency can be improved.

The invention relates to an automatic laying robot for direct-embedded communication cable. The automatic laying robot for direct-embedded communication cable comprises a travelling device, an earth cutting device and a grouting device. The earth cutting device is mounted at the front end of the travelling device. The grouting device is mounted on the travelling device. The automatic laying robotcan solve the problems that in the existing direct-embedded cable laying process, operators need to ditch and grout layers manually, during ditching, the operators need to use tools for ditching, later operation is affected due to uneven manual ditching, during laying-up, ditch bottoms need to be manually grouted and rolled, during grouting of side faces, cement boards need to be grouted and solidified by the operators outside and then conveyed to designated spots to be mounted, during advancing, existing equipment vehicles vibrate during travelling due to the steep land surface, the working progress is affected, the existing equipment vehicles is prone to vibrating when standing still in situ for operation due to the fact that no fixing device is arranged, lots of time is taken, the laborintensity is high, and the efficiency is low, and the functions of automatic ditching and laying-up for the direct-embedded cables can be achieved.

The invention relates to an intelligent robot for the direct-buried laying of a communication cable. The robot comprises a traveling device, an excavating device and a backfill device. The excavatingdevice is installed at the front end of the traveling device, and the backfill device is installed at the rear end of the traveling device. In an existing direct-buried cable laying process, the trenching and the backfilling and rolling of soil by the staff are needed, the staff need to use tools for trenching in trenching, later work is affected if a trench is not flat in manual trenching, a later backfill effect is affected if the sizes of artificially excavated soil blocks are not consistent, at the same time, the soil processing is cumbersome after the manual trenching, when soil is backfilled, flapping and pressing the soil after the backfilling of the artificially excavated soil are needed, if manual pressing is not compact, an existing vehicle vibrates in walking to affect the process of the work in going forward due to a steep land surface, and the existing vehicle easily shakes without a fixing device when the existing vehicle works at a fixed place, the above problems are solved by the intelligent robot in the invention, and the function of the intelligent laying of the communication cable can be realized.

The invention discloses a calculation method of temperature of conductors of multi-loop soil directly buried cables. The method comprises the following steps: determining a cable and a soil temperature field two-dimensional solving region and numbering each loop of cable in sequence; determining a boundary condition and a physical parameter of the temperature field solving region; calculating initial temperature of each cable conductor under the conditions that all loops are not electrified; solving the thermal resistance parameter of each cable by comprehensively utilizing an analysis method and a definite element method, and further solving the conductor temperature rise caused by loss of the cables; calculating an interaction coefficient between every two cables, and further solving the temperature of each cable conductor caused by an external cable heat source; constructing a multi-loop soil directly buried cable conductor temperature calculation model to accurately calculate the conductor temperature of each cable. The method is suitable for various main laying forms of a current power cable, in particular a cluster laid cable lines with relative lack in research, and the calculation precision is improved while the cable conductor temperature calculation method is simplified.

The invention discloses an excavation device of a direct burial cable trench and belongs to the electric power planning technical field. The excavation device comprises a first supporting frame; the bottom of the first supporting frame is provided with foundation bolts; the top of the first supporting frame is provided with a guide rail; the guide rail is provided with a supporting seat; the supporting seat is in sliding connection with the guide rail; the first supporting frame is provided with a traction mechanism for driving the supporting seat to move; a supporting plate is arranged below the supporting seat; the supporting plate is provided with guide columns; the supporting seat is provided with a guide sleeve which is adaptive to the guide columns; the supporting seat is provided with a supporting plate lifting mechanism; the bottom of the supporting plate is provided with a supporting cylinder; the bottom of the supporting cylinder is provided with a disc milling cutter; and one end of the supporting plate is provided with a cleaning device. With the excavation device of the invention adopted, a cable trench of a corresponding width can be excavated in a road, and the engineering amount of later-stage construction can be decreased, and cable laying cost can be reduced.

The invention relates to a preparation method of high-heat-resistance high-strength half tubes used for embedded electric cables, which includes steps of utilizing 63-75 weight parts of polyethylene glycol terephthalate as raw materials, adding 13-18 weight parts of propylene-ethylene random copolymer, 8-12 weight parts of fire retardant masterbatches, 3.5-6.0 weight parts of maleic anhydride grafting polyethylene and 0.5-1.0 weight part of Triisodecyl (2,4-di-tertiary butyl phenyl) phosphite ester, and preparing the half tubes by drying, dewatering, mixing, stirring, extruding, pelleting, extruding, forming, cooling and forming. The half tubes prepared by the preparation method are high in vicat softening temperature, fine in insulation performance, high in corrosion resistance and fire retardant level, resistant to creep deformation, fine in pressure and tension resistance and applicable to fields of protection modifying of directly-embedded cables, protection of ground access cables and paving protection tubes of seabed cables and the like.

The invention discloses a buried cable pile which is reasonable in structure and capable of effectively preventing a person or a car from colliding with the buried cable pile. According to the technical scheme, the buried cable pile comprises a spring, wherein a buried body is arranged on a base, the spring is arranged at the upper portion of the buried body, and an indication pillar is arranged at the upper portion of the spring and is made of plastics. The buried cable pile is reasonable in structure, good in use effect and capable of effectively avoiding damaging people or cars.

The invention relates to a parameter optimization method for a backup power parallel reactor based on an anti-typhoon running mode of a wind power plant. The method comprises the following steps: firstly, integrally modeling for the system under the anti-typhoon running mode, wherein the system model comprises a backup power supply, a backup power parallel reactor, a backup power transformer, a direct buried cable and a plurality of multi-path wind turbine generator equivalent models; respectively calculating power loss of system elements in the models; confirming the parameter of the reactor requiring parallel connection according to the system power factor before optimization and the realized power factor after optimization. The parameter optimization method for the backup power parallel reactor based on the anti-typhoon running mode of the wind power plant, provided by the invention, is used for optimizing the oversize capacity current into lower sensitive current and is beneficial to the closing operation of the circuit breaker.

The invention relates to direct-buried type communication cable laying equipment with capacity of realizing intelligent excavation and laying. The equipment comprises a lifting plate, an excavation device and a grouting device, wherein the excavation device is mounted at the front end of the lifting plate; the grouting device is mounted on the lifting plate. With the adoption of the equipment, theproblems that a worker is required to perform ditching and manual grouting and laying in conventional direct-buried cable mounting process and potential safety hazards are produced because of back injury caused by the fact that the worker needs to dig a ditch by a tool during ditching and bends down to work for a long time are solved, and furthermore, the problems that soil treatment is tedious after manual ditching, the bottom of the ditch is required to be subjected to grouting rolling manually during laying, the manual rolling is uneven as well as gaps are easily produced between cement slabs, the cement slabs are mounted unstably, time consumption of the laying process is high, labor intensity is high, efficiency is low and the like due to the fact that the cement slabs are required to be subjected to grouting solidification outside by the worker during grouting on the side surface and then transported to designated positions for mounting are solved, so that the equipment can realize functions of intelligent excavation and laying of communication cables.

The invention provides a method and system for arranging a line for a preliminary qualification test of a submarine cable system, and the method comprises the steps: arranging a place, and setting a seawater environment simulation pool, a tunnel, a snake-shaped laying region, an underground threading cable trench, a directly buried cable trench, and an arc-shaped bent cable trench; laying a submarine cable at the arranged place, and dividing the laid line into various laid segments according to the difference of operation environments and laying states; installing submarine cable accessories;and completing the burying and seawater simulation environment arrangement according to the laying requirements. The method and system can achieve the arrangement of the submarine cable line on the land, increase the seawater environment simulation segment, enable the arrange of the line for the preliminary qualification test of the submarine cable system to completely represent the conditions ofthe laying design in the submarine cable standard, can guarantee that the long-term performances of the submarine cable system are checked truly, effectively, scientifically and objectively through the preliminary qualification test.

The invention relates to a direct-buried 1KV polyvinyl chloride insulated power cable laying machine with intelligent backfilling. The direct-buried 1KV polyvinyl chloride insulated power cable layingmachine comprises a frame, a horizontal plate, two backfilling mechanisms, a soil loosening mechanism, a rolling mechanism and two auxiliary mechanisms. A transverse plate is installed on the frame.The lower end front side of the horizontal plate is equipped with two symmetrically arranged backfilling mechanisms, the lower end middle of the horizontal plate is equipped with the soil loosening mechanism, the lower end back side of the horizontal plate is equipped with the rolling mechanism, and the left and right ends of the horizontal plate is equipped with the two symmetrically arranged auxiliary mechanisms. In an existing direct-buried cable laying process, the backfilling and rolling of soil by the staff are needed, flapping and pressing the soil after the backfilling of the artificially excavated soil are needed, the process is cumbersome, long-term bending work can easily cause body injury and cause potential safety hazards, the sizes of excavated soil blocks are not consistent,the manual pressing is not compact, the above problems can be solved by the direct-buried 1KV polyvinyl chloride insulated power cable laying machine in the invention, and the functions of automatically backfilling and rolling the soil in laying a direct-buried cable can be achieved.

The invention provides a method for rapidly repairing the damage of a directly-buried cable, which is particularly suitable for repairing the damage of a cable outer sheath or the main insulation of the cable, the insulation sealing performance of the cable is recovered by using a high-voltage waterproof insulation composite adhesive tape in a semi-lapping manner, the mechanical damage resistanceof the cable is recovered by using an industrial armor wrapping tape, and the cable does not need to be cut off. The original main body structure of the cable does not need to be damaged, and only thedamaged part of the cable needs to be repaired to prevent water and moisture from entering the cable to cause insulation faults of the cable. Compared with a traditional repairing method, the high-voltage waterproof insulation composite adhesive tape is used for recovering the insulation sealing performance of the cable in a half-lap wrapping mode, the industrial armor wrapping tape is used for recovering the cable, rapidness and convenience are achieved, and the cost is low; no intermediate joint is generated, the primitiveness of the cable is ensured, and the original electrical insulationperformance of the cable is ensured; and only a fault point needs to be excavated, and the earth excavation amount is reduced.

The invention relates to equipment for automatically laying a direct-buried 10KV overhead insulated cable, and the equipment comprises a walking device, a digging device, a slip casting device and a backfill device. The front end of the walking device is provided with the digging device, and the walking device is provided with the slip casting device. The rear end of the walking device is providedwith the backfill device. The equipment can solve problems that a worker needs to use tools for digging, manual casting and laying and the backfilling and rolling of soil in a laying process of a direct-buried cable, and the long-time stoop is liable to cause hidden troubles; a problem that during laying, the slip casting and rolling of a trench bottom needs to be performed manually, and the manual rolling enables soil not to be uniform; a problem that during the backfilling of soil, the soil needs to be manually backfilled for hitting and pressing, and the manual pressing enables soil not tobe compact; and a problem that during advancing, the vibration of a conventional equipment vehicle affects the work progress during walking because of the steep soil surface. The equipment can achieve the automatic laying of the direct-buried cable.

The invention relates to a buried 750V polyvinyl chloride insulated control cable laying machine capable of automatically digging a trench. The machine comprises an auxiliary expansion board, a largeair cylinder, a top plate, a soil crushing mechanism, a soil shoveling mechanism and a recovery mechanism. The lower end of the auxiliary expansion board is equipped with the large air cylinder. The top end of the large air cylinder is installed at the upper end of the auxiliary expansion board. The front end of the lower end of the auxiliary expansion board is equipped with the top plate. The lower end front side of the top plate is equipped with the soil crushing mechanism. The lower end middle part of the top plate is equipped with the soil shoveling mechanism. The lower end back side of the top plate is equipped with the recovery mechanism. In an existing direct-buried cable laying process, the trenching by the staff is needed, the staff need to use tools for trenching, long-term bending work causes body injury and causes potential safety hazards, a later backfill effect is affected if the sizes of artificially excavated soil blocks are not consistent, the soil processing is cumbersome after the manual trenching, the process takes a long time, the labor intensity is large and the efficiency is low, the above problems can be solved by the buried 750V polyvinyl chloride insulatedcontrol cable laying machine in the invention, and the functions of automatic digging and transportation in laying the cable can be achieved.

The invention provides a constant-tension and autonomous straightening paying-off device attached to a direct-buried cable paying-off vehicle. The problems that an existing paying-off vehicle is largein paying-off operation difficulty and unsuitable for direct-buried laying are effectively solved. The constant-tension and autonomous straightening paying-off device comprises a bracket, two side plates are mounted on the bracket, a line roller is mounted on the side plates, two guiding rods and a reciprocating lead screw are mounted on the two side plates, an engine of the paying-off vehicle isconnected with a rotating wheel of the reciprocating lead screw through a transmission belt, the guiding rods and the reciprocating lead screw are used for supporting and mounting a paying-off straightening device, a motor is mounted on the side wall of a rack of the paying-off straightening device, two pairs of longitudinal pressing wheels and transverse pressing wheels which are mounted correspondingly are mounted inside the rack, and the motor is connected with the longitudinal pressing wheels in a belt transmission mode. The constant-tension and autonomous straightening paying-off devicehas the beneficial effects that a reciprocating moving device and a bidirectional pressing wheel paying-off device are arranged in one device, and the purpose of constant-tension and straightening paying-off can be achieved through one device.

The invention relates to the field of power transmission line cables. Aiming at displacement damages caused by the rain washing to a pre-buried cable in a mountainous area in the prior art, the invention provides a slope direct-buried cable protection device for the mountainous area. The device is characterized in that a cable is provided with cable protection sleeves at set intervals; parts, located at two sides of the cable protection sleeve, of the cable are respectively provided with a pre-buried part buried in soil; elastic parts are respectively disposed between the pre-buried parts and the cable protection sleeves. The device is simple in structure. During the laying of a slope direct-buried cable, angle irons are respectively buried at two sides of the cable at intervals, and the cable is sleeved by a protection sleeve layer. The protection sleeves are connected with the angle irons through an adjustable elastic device. When the soil covering the surface of the cable is lost, the cable can be fixed through the angle irons, and the elastic device can counteract the impact on the cable from a part of external forces, thereby achieving the protection of the cable. The device can reduce the impact damages caused by the external force to the cable, protect the cable, and guarantee the power utilization reliability of a scenic region.

The invention relates to a directly-buried cable laying method which comprises the following steps of S1, planning a cable path, and digging a groove in the surface of a ground layer; S2, laying broken stone hardcore layers on the trench bottom wall and two side trench walls of a trench, and pouring concrete waterproof plaster layers on the surfaces of the broken stone hardcore layers to form a cable trench; S3, installing a plurality of drainage boxes on the trench bottom wall of the cable trench, defining a water storage and drainage space by the side walls of the drainage boxes and the trench wall of the cable trench, and enabling water in the water storage and drainage space to permeate into the drainage boxes through water seepage holes in the side walls of the drainage boxes to be collected; S4, along the planned cable path, dragging the cable to the top of the drainage box and fixing; S5, covering a cement cover plate above the cable trench along the planned cable path until thecable trench is closed; and S6, backfilling the cable trench, and completing the laying of the directly-buried cable. The method has the effect of preventing the cable from being soaked in rainwaterfor a long time to affect the service life.

The invention discloses a direct-buried cable trench with a protective structure. The cable trench includes a trench and a cover plate located above the trench. Cables are laid in the trench, and a protective cover is fixed directly above the cable. plate, the cable line is located in the vertical projection of the protective plate, and the protective plate is fixedly installed between the side walls of the channel. The cable channel of the present invention can effectively protect the cable by adding a protective structure on the cable. The protective plate has a simple structure and is easy to install, greatly improving the service life of the cable.

The invention provides a flexible sealing structure for underground direct-buried cable or optical cable through-wall and a construction method. The structure comprises a through-wall protection tubeand a flexible sealing assembly arranged between the through-wall protection tube and a cable or an optical cable. The flexible sealing assembly is at least arranged on the upstream face side of the through-wall protection pipe. The flexible sealing assembly comprises a long pipe hoop, a flexible sealing piece located in the long pipe hoop and an end locking gland installed at the end of the longpipe hoop, a flexible sealing piece is arranged between a threaded adjusting check ring arranged in the long pipe hoop and the end locking gland, and the flexible sealing piece and the sealing faces of the through-wall protection pipe and the cable or the optical cable form static sealing. According to the invention, the flexible sealing assembly with a pre-pressing and pre-tightening adjusting mechanism is adopted between the cable or the optical cable and the through-wall protection tube; the functions of radial two-way positioning and axial side two-way positioning are achieved, a sealing ring set in the sealing cavity is made to be in three-way extrusion stress, a static sealing zero space between the through-wall protection pipe and the cable or the optical cable is formed, and therefore, the waterproof sealing effect is achieved.

The invention discloses an underground cable positioning thermometer which comprises a temperature sensor, a main control chip MCU, a radio frequency chip, an LC oscillating circuit and a power supply. The main control chip MCU is connected with the temperature sensor and the radio frequency chip, the LC oscillating circuit is connected with the radio frequency chip to achieve signal receiving and sending, and the power supply is used for supplying electricity to the components. The underground cable positioning thermometer overcomes the defects that fault discovery is not in time and repair, maintenance and searching are inconvenient due to the fact that buried cables are buried underground and provides a rapid response means for maintenance of the cables. Meanwhile, by using the underground cable positioning thermometer, an underground cable temperature data obtaining system can be established, an underground cable temperature data network is formed after temperature data are collected in real time, the data can be used for analysis of big data, and a reference is provided for study of the operation condition of the macro economy.

The invention discloses a waterproof agricultural buried cable, which relates to the field of electric wires and cables. The waterproof agricultural buried cable comprises a conductor which is surrounded and wrapped by an insulating layer and a protective layer from inside to outside sequentially. The cable is characterized in that: the conductor is a compacted conductor without a single-wire gap, is surrounded and wrapped by a waterproof layer between the insulating layer and protective layer and also has longitudinal and radial waterproof structures. The waterproof structures arranged on the cable can effectively prevent water from radially entering the insulating layer of the cable, also prevent the water from axially permeating the cable and greatly improve the insulating property and the problems of high leakage, heavy loss, easy breakdown and power-failure and the like of the product, thereby greatly prolonging the service life of the cable and ensuring power supply safety. Thus, the waterproof structures arranged on the cable plays an important role in fulfilling the aim of upgrading rural power grids to be safe, high in quality, highly-efficient and low in consumption.

The invention relates to a direct-buried cable current-carrying type selection method for a photovoltaic system. The method comprises the following steps: firstly, fitting a daily load period curve flowing through a cable in the photovoltaic system according to Pvsyst per hour data on the basis of the periodic load characteristic of the photovoltaic system; and then based on the confirmed daily load period curve and the actual laying environment and configuration of the buried cable, a cable period load factor is calculated through software (CYMCAP or the like), a cable current peak value under the period load is confirmed, and therefore the calculation method suitable for photovoltaic system buried cable type selection is provided. The invention further provides a 35kV direct-buried cable load factor M value table look-up method, the minimum value of M is confirmed, practical engineering application is facilitated, the cable section is effectively reduced, and therefore the cable cost is reduced.

The invention relates to a communication system and method and a monitoring system and method for cable monitoring data, and a storage medium. The communication system comprises a background server, a processing module, and a wide area network communication management module and a 4G communication module which are respectively connected with the processing module. The wide area network communication management module acquires the circulation data acquired by the circulation acquisition device and transmits the circulation data to the processing module; the processing module transmits the acquired image data to the 4G communication module and transmits the circulation data to the 4G communication module; and the 4G communication module transmits the image data and the circulation data to a background server. The wide area network communication management module can enable the cable monitoring data in the cable joint well to be remotely transmitted; the integrated application of the two communication modes is realized, and the external damage monitoring data and the online monitoring data of the high-voltage cable can be acquired at the same time, so that the states of the high-voltage cable body and the joint can be mastered in real time, and the labor cost of the traditional full-line manual supervision of the direct-buried cable is reduced to a certain extent.