7 results about "Direct-buried cable" patented technology

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 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 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 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.