591results about "Apparatus for joining/termination cables" patented technology

A module (10) is provided which comprises a first module part (1) comprising a first electrical conductor (11), first foils (12) and first isolating structures (13) alternated with the first foils (12). The module (10) further comprises a second module part (2) comprising a second electrical conductor (21), second foils (22) and second isolating structures (23) alternated with the second foils (22). The module (10) further comprises a joint region (3) which includes a conductor connector (31), connecting structures (32) and an insulation material (33). The first module part (1) and the second module part (2) are joined together in the joint region (3). The conductor connector (31) mechanically and electrically connects the first electrical conductor (11) to the second electrical conductor (21). Each one of the connecting structures (32) electrically connects one of first foils (12) to one of the second foils (12). The joint region (3) is filled with the insulation material (33) for electrically isolating at least the conductor connector (31) and the connecting structures (32) from each other. Moreover, a method for producing such a module (10) is provided.

A method of performing a quality inspection of a vulcanized joint of a power cable during manufacturing of the vulcanized joint, the method comprising: a) obtaining, from a laser scanner, measurements of an outer surface of an inner semiconducting layer provided over a conductor joint which joints conductors of two power cable sections, and of a transition area between the outer surface and outer surfaces of a respective inner semiconducting layer of the two power cable sections, b) obtaining, from a laser scanner, measurements of an outer surface of a tapering section of an insulation layer arranged around a respective one of the inner semiconducting layers of the two cable sections, c) processing the measurements obtained in step a) and in step b), the processing involving generating one or a respective 3-d model of the outer surfaces and evaluating an outer surface quality of the outer surfaces based on the one or more 3-d models, d) presenting a conclusion regarding surface quality based on the evaluation, e) obtaining, from a laser scanner, measurements of an outer surface of a joint insulation arranged around the inner semiconducting layer that is provided over the conductor joint, the joint insulation having been provided over the inner semiconducting layer provided around the conductor joint after step d), and f) processing measurements obtained from the laser scanner in step e), the processing involving determining an insulation thickness or an outer diameter of the joint insulation, and g1) presenting the insulation thickness or outer diameter, and / or, g2) evaluating the insulation thickness or outer diameter, and presenting a conclusion regarding the insultation thickness or outer diameter based on the comparison.

Power cables are provided having a joint with a metallic water barrier and, in particular, metallic water barrier materials for cable joints for use in high voltage cables for both land and submarine applications.

The invention relates to the technical field of electric power fittings, in particular to an electric power fitting for an electric power circuit frame, which comprises an insulation piercing wire clamp body, the insulation piercing wire clamp body comprises an upper shell and a lower shell, and the outer wall of the insulation piercing wire clamp body is detachably connected with a moving mechanism; the moving mechanism comprises an inverted-U-shaped shell, a plurality of sliding grooves are formed in the inner circumferential wall of the inverted-U-shaped shell, and sliding shells are slidably connected to the inner walls of the sliding grooves. A complete automatic operation closed loop is constructed by integrating a moving mechanism, an automatic cleaning system and an intelligent mounting mechanism, the device can automatically move and position along a cable, and under the coordination of a PLC, a wet sponge and a dry sponge sequentially perform rotary cleaning on the surface of the cable to effectively remove an oxide layer and dirt; during installation, the bolt tightening torque is intelligently judged through rotating speed monitoring, it is ensured that the puncture depth is accurate and controllable, manual intervention is not needed in the whole process, and the installation efficiency and consistency are greatly improved.

The invention relates to a pinhole cable glue pouring device and method of a motor train unit brake control system, and belongs to the technical field of cable connection.The pinhole cable glue pouring device of the motor train unit brake control system comprises a machine body, a glue pouring device, a glue pouring tool and a defoaming mechanism, the glue pouring device is arranged on the machine body, and the defoaming mechanism is arranged on the machine body; the glue pouring device is used for providing pouring glue, the glue pouring tool is used for fixing a cable and a connector, a glue pouring cavity is formed in the glue pouring tool, when the cable and the connector are fixed to the glue pouring tool, the connecting position of the cable and the connector is located in the glue pouring cavity, the defoaming mechanism is arranged on the glue pouring tool, and the defoaming mechanism is arranged on the glue pouring tool. The defoaming mechanism comprises a defoaming ring detachably arranged on the glue filling tool, a piston ring arranged in the defoaming ring in a sliding mode, an operation piece arranged on the defoaming ring and an isolation assembly arranged on the bottom wall of the defoaming ring. The cable connector has the effect of ensuring the connection reliability between the cable and the connector.

A submarine connection box for connecting a system of submarine power cables, each including at least one submarine power cable core, the submarine connection box including: a casing, the casing having N first openings configured to receive a respective submarine power cable of a first set of N submarine power cables, N being an integer equal to or greater than 1, the casing having K second openings configured to receive a respective submarine power cable of a second set of K submarine power cables, K being an integer greater than 1, a termination box arranged inside the casing, the termination box having a housing including a first group of openings, and a second group of openings, each of the first group of openings being configured to receive a respective submarine power cable core of the first set of N submarine power cables, and each of the second group of openings being configured to receive a respective submarine power cable core of the second set of K submarine power cables, and L sets of connectors arranged in the termination box, L being an integer equal to the number of electrical phases or poles of the system of submarine power cables, wherein for each of the L sets, the connectors are electrically interconnected with each other and configured to connect submarine power cable cores of corresponding electrical phases or poles of the first set of N submarine power cables and the second set of K submarine power cables.

The invention relates to an auxiliary device and method for cable accessory installation. The auxiliary device for cable accessory installation comprises an operation assembly, a cleaning assembly, an inspection assembly and an oil injection assembly, and the operation assembly comprises an operation rod. The cleaning assembly is installed at the end, away from the holding handle, of the operating rod and used for cleaning the inner wall of the cable accessory. The inspection assembly is installed on one side of the cleaning assembly and used for inspecting whether the inner wall of the cable accessory has quality defects or not. The oil spraying assembly is installed on the other side, away from the inspection assembly, of the cleaning assembly and used for spraying oil to the inner wall of the cable accessory. The auxiliary device and method for cable accessory installation have the advantages of being good in use stability and convenient and fast to operate.

An expansion tool is provided, suitable for expanding an axial through-hole of an intermediate insulation joint of a cable, and includes: two expansion assemblies, respectively disposed at both ends of the intermediate insulation joint and each including: an expansion module having an expansion portion adapted to expand the axial through-hole; a clamping assembly for clamping and fixing the expansion module during expansion of the axial through-hole; and a guiding assembly including a guiding module adapted to partially insert into the axial through-hole to guide the expansion portion into the axial through-hole; and a tensioning mechanism adapted to tension the two expansion assemblies at both ends of the intermediate insulation joint in such a way that the two expansion assemblies are brought closer to each other, such that the expansion portion, guided by the guiding module, enters the axial through-hole to enlarge the inner diameter of the axial through-hole, wherein the expansion module can be replaced by another expansion module of a different size, and / or the guiding module can be replaced by another guiding module of a different size, for expanding the axial through-hole to have different inner diameters.

The utility model relates to the technical field of wiring equipment for electric power communication, in particular to an auxiliary wiring device for electric power communication, which comprises a horizontally arranged supporting beam, two supporting columns arranged on the top surface of the supporting beam, an adjusting mechanism arranged on the supporting beam, a fixing mechanism mounted on the supporting columns and comprising a supporting block and a fixing belt. A groove is horizontally formed in the middle of the top face of the supporting block, the two ends of the groove penetrate through the supporting block, a clamping groove is horizontally formed in one side of the top face of the supporting block, one end of the clamping groove penetrates through the supporting block, and a through hole is vertically formed in the side, away from the clamping groove, of the top face of the supporting block. The other end of the fixing belt is fixedly connected with a clamping block matched with the clamping groove. According to the utility model, the fixing band is tightened through the winding mechanism, so that the fixing band uniformly applies force to fix the cable in the groove, thereby reducing the condition that the insulating layer of the cable is damaged due to local stress of the cable.

Technologies are described for devices and methods to splice two contacts of a cable. The assemblies may comprise a first and second sealing boot each configured to slide onto and form a seal to the cable. The assemblies may comprise a pin contact and a socket contact. A first side of the pin contact may be configured to receive wires from the cable. A second side of the pin contact may be configured to mate with the socket contact. A first side of the socket contact may be configured to receive wires from the cable. A second side of the socket contact may be configured to mate with the pin contact. The assemblies may comprise a housing with a tube shaped body and a grommet at a first and second end. Each grommet may be configured to form a seal to the first sealing boot or the second sealing boot.

The utility model discloses a high-voltage cable joint sliding installation tool, which comprises two semi-circular limiting rings and two installation seats, the two semi-circular limiting rods are symmetrically arranged up and down, the two installation seats are respectively arranged at the two ends of the two semi-circular limiting rings, the two ends of the two semi-circular limiting rings are respectively provided with a connecting seat, and the two ends of the two semi-circular limiting rings are respectively provided with a connecting seat. Mounting grooves are formed in the opposite side walls of the two mounting seats, the connecting seats are connected into the mounting grooves in a sliding mode, long-strip-shaped through grooves are formed in the connecting seats, a pair of fastening bolts are fixedly mounted on the mounting seats, and the fastening bolts are connected into the long-strip-shaped through grooves in a sliding mode. When the fixing device is used, along with the increase of the diameter of the rubber insulator, the two semicircular limiting rings can move and open back to back through the sliding fit of the long-strip-shaped through grooves and the fastening bolts, damage to the rubber insulator is avoided, and the fixing device is simple in overall structure, low in production cost and worthy of popularization.

The utility model relates to power cable technical field, concretely is a kind of medium voltage cable end head making operation platform, including the operation platform body, support frame and pay-off rack arranged in sequence, pay-off rack is used to carry cable, and support frame is used to support the cable between pay-off rack to operation platform body;Operation platform body has table panel, and table panel is equipped with fixed forceps, and the one end of table panel towards support frame is equipped with the first horizontal cylinder of horizontal arrangement, and the both ends of first horizontal cylinder are equipped with the first vertical cylinder of vertical arrangement;Support frame is equipped with the second horizontal cylinder of horizontal arrangement, and the both ends of second horizontal cylinder are equipped with the second vertical cylinder of vertical arrangement.Cable is introduced by pay-off rack, in turn through the cylinder on support frame, and the cylinder on table panel, finally into fixed forceps and be clamped and fixed.Worker after cable is clamped and fixed, carries out insulation layer peeling, conductor processing and subsequent operation such as terminal crimping.

The application relates to a power transmission capacity management device based on a virtual power plant and an operating method, and belongs to the technical field of virtual power plant terminals. The device comprises a hollow terminal shell and a plurality of electronic devices arranged in the terminal shell, further comprises a wiring assembly, the wiring assembly comprises clamping devices and cable joints, the clamping devices are used for clamping metal parts at one end of the cables, and the two ends of the cable joints are connected with the clamping devices and the electronic devices respectively. By arranging the clamping devices, the clamping devices are completely attached to the metal parts at one end of the cables. Compared with the existing wiring heads, the contact area between the wiring head and the metal parts of the cable is larger, the problem that the contact area between the traditional wiring head and the cable is not complete is solved, once the current transmitted between the cable and the wiring head is too large, the current is concentrated in a local area, due to the large current density, the conductivity is reduced, heat is easily generated, even sparks, thereby causing current overload, short circuit or other safety hazards.

An automatic splicing or welding apparatus comprising: a wire holder (200) adapted to hold a wire section (300) plugged with a given longitudinal alignment and parallel extension in a pre-stripped state; and an automatic splicing or welding machine separate from the wire holder, the robot arm being equipped with a robot gripper for gripping the pre-stripped wire sections in the wire holder and stripping them by forcibly withdrawing them from the wire holder, and bringing the stripped wire segments into a splicing or welding machine for splicing or welding while maintaining longitudinal alignment and parallel extension of the wire segments. The gripper has a comb-like gripping wall structure (110a) comprising a series of movable gripping walls (111) extending longitudinally in parallel and spaced apart laterally, each pair of adjacent gripping walls forming therein a wire receiving passage capable of gripping a section of wire.

The invention discloses an operation tool for a distribution network uninterruptible operation friendly wire clamp and an operation method thereof, and the operation tool comprises an installation unit which comprises an insulation installation shell, a pressing assembly disposed in the insulation installation shell, an extension insulation assembly disposed at the bottom of the insulation installation shell, and a hook assembly disposed outside the extension insulation assembly. And the clamping assembly is arranged on the hook assembly. And the clamping unit comprises an upper clamping jaw assembly arranged on the pressing assembly and a lower clamping jaw arranged on the insulating mounting shell. The driving unit comprises a connecting assembly arranged on the pressing assembly and a pushing assembly arranged on the connecting assembly. According to the operation tool for the distribution network non-power-cut operation friendly type wire clamp and the operation method of the operation tool, the power distribution operation wire clamp is clamped on the lower clamping jaw, so that the upper clamping jaw assembly stably clamps the power distribution operation wire clamp downwards; and then the extension insulation assembly is moved to move the power distribution operation wire clamp to the main cable, and high-altitude live-line work of an operator is not needed.

The invention relates to the technical field of hot-line work, in particular to a transformer substation drainage wire lap joint robot and an operation method, and provides the transformer substation drainage wire lap joint robot which comprises a high-voltage equipotential device, a multi-direction position adjusting device, a robot limiting device, a robot body and a lap joint device. The device can be suitable for robot mechanical arm operation on a transformer substation drainage wire, equipotential is formed, an equipotential body is formed, the safety and reliability of equipment are ensured, transverse and longitudinal position adjustment is achieved in the horizontal direction for a multi-direction position adjusting device part, height position adjustment is achieved in the vertical direction, and the safety and reliability of the equipment are guaranteed. The position of a maintenance robot is adjusted from three dimensions, and for a robot limiting device part, a first limiting part and a second limiting part are adopted to limit a live main line where a T-connection fitting is located from the two ends, so that a small working environment tending to be static is formed in a working area.

The application discloses a fixing device for solving the difficulty in connecting a 10kV line cable and a bypass cable, and mutually clamped first clamping jaws and second clamping jaws, one end of the first clamping jaws and the second clamping jaws is connected with a clamping piece, the inside of the upper end clamping piece of the first clamping jaw is provided with a hanging head, and the inside of the lower end clamping piece of the second clamping jaw is provided with a cable bridging device. The device is provided with safety reduction safety risks. In the load transfer work of the 10kV line cable head in the station, after the device is used, the phase-to-phase short circuit risk is reduced, the safety of the operating personnel is effectively guaranteed, and the economic benefit of the company is effectively improved. Under normal circumstances, the 10kV line in the transformer substation needs to be powered off for primary and secondary equipment maintenance, testing, and comprehensive self-reconstruction, which causes a large number of households to be powered off and a long power-off time. After the device is used, the whole station power-off can be avoided, the power supply capacity is improved, and the labor intensity is reduced.

[Problem] To provide an electric cable connecting method and a joined electric cable with which terminal conductors in a gathered state can be joined. [Solution] This method for conductively connecting exposed terminal conductors 21a of a plurality of coated electric cables 20 includes: a step s2 of gathering each of the coated electric cables 20; a fixing step s3 of fixing the terminal conductors 21a of the gathered plurality of coated electric cables 20 using a resin cover 50; and a joining step s4 of setting in an electric cable connecting device 40 the plurality of coated electric cables 20 of which the plurality of terminal conductors 21a have been fixed using the resin cover 50, and joining the plurality of exposed terminal conductors 21a.

The invention discloses a cable branch box operation state monitoring system, which comprises a distributed sensing network, a heterogeneous fusion center, a cognitive decision engine and a self-adaptive execution terminal, and is characterized in that the distributed sensing network is deployed in the whole domain of a branch box in a matrix manner, and is configured with a multi-physical field sensing array, a passive self-powered node and a flexible sensing patch; data such as electrical parameters, environmental characteristics and structural micro-change are synchronously collected, a biological heuristic self-repairing mechanism and a self-adaptive sampling strategy are provided, monitoring blind areas can be avoided, sensing continuity is guaranteed, energy consumption is reduced, the heterogeneous fusion center is interconnected with a sensing network through an optical fiber bus, and modules such as a dynamic data cleaning engine are arranged in the heterogeneous fusion center. A standardized state matrix is constructed for multi-source data space-time alignment, feature fusion, interference data elimination and equipment aging recessive index extraction to adapt to different working conditions.

The utility model discloses an explosion-proof sealing cable joint welding device, and relates to the technical field of cable joint welding. Comprising a cable connector welding mechanism, the cable connector welding mechanism comprises a welding machining table, a welding control panel is installed on the surface of one side of the welding machining table, wire pressing position adjusting assemblies are fixedly installed at the two ends of the top of the welding machining table, and a positioning welding assembly is fixedly installed at the top of the welding machining table; the positioning welding assembly is located between the two wire pressing and position adjusting assemblies, and two welding pressing assemblies are fixedly installed at the top of the welding machining table. According to the utility model, cables at two ends can be pressed and transferred, pressing butt joint of the cables at two ends is facilitated, the convenience of subsequent welding of the cables is improved, meanwhile, a cable joint can be positioned and welded, accurate welding operation of the cable joint is facilitated, the welding effect of the cable joint is improved, and the welding efficiency of the cable joint is improved. The practicability of the device is improved.

The invention discloses a supporting insulator-free extra-high voltage bus flexible butt joint device and method, and relates to the technical field of high voltage cable connection, and the device comprises an insulator and two buses, and also comprises a connection assembly. The connecting assembly comprises a butt joint block which is fixedly connected with the insulator. The butt joint block is fixedly provided with a fixing frame and two arch-shaped metal bars. The same ends of the two arch-shaped metal bars are jointly provided with a locking mechanism, and the two ends of the fixing frame are each fixedly provided with two limiting mechanisms. The device has the advantages that firstly, the arched metal bar is matched with the buffer spring to form double elastic buffer, so that the energy absorption adaptability is high, and the buffer compensation is more stable; locking and bilateral limiting mechanisms are cooperated, flexible compensation and accurate limiting are achieved, and it is guaranteed that the bus track is controllable; 3, the traditional insulator mechanical coupling design is abandoned, so that the shock resistance and impact resistance are greatly improved; and 4, a spring plate deformation linkage locking structure can automatically improve the locking strength of the bus, and the operation is more stable.

The invention relates to the technical field of high-altitude electric power operation robots, and provides a 10kV J-shaped wire clamp bus installation system, method, device and medium, a visual module of the system collects single-visual-angle point cloud data of an operation area by using a depth camera, and carries out fitting to obtain bus axis key points and insulated terminal feature points, so that the positioning accuracy is guaranteed; the visual module is used for positioning a target operation position, so that the conversion from visual identification to precise coordinates and postures which can be executed by the mechanical arm is realized; the controller controls the wire stripping tool to automatically and accurately strip the insulating layer of the bus, so that the inaccuracy and the safety risk of manual wire stripping are avoided; a mechanical arm automatically buckles a J-shaped wire clamp bus duct hole into a bus exposed metal area, and performs dynamic adjustment based on a sensing assembly to ensure that a bus enters a groove and keeps dynamic balance; after the double-arm hot-line work platform detects that the drainage wire is installed and the J-shaped wire clamp is locked, the mechanical arm is timely driven to leave the work area, and the safety risk is reduced.

The invention belongs to the technical field of power cable installation, operation and maintenance, and discloses a cable main insulation reducing part conical surface machining device and a using method thereof.The device comprises a cable fixing component, an adjustable guide mechanism, an adjustable tool rest component and a driving component; the cable fixing part comprises a main body frame and clamping mechanisms, the multiple clamping mechanisms are arranged in the circumferential direction of the main body frame, and the adjustable guide mechanism is connected with the main body frame; the adjustable tool rest part comprises a tool rest main body, a guide assembly, a tool and a feeding control structure, the tool rest main body is in sliding connection with the adjustable guide mechanism through the guide assembly, and the tool rest main body axially moves and circumferentially rotates along the adjustable guide mechanism at the same time to drive the tool to cut the diameter-variable part of the main insulation of the cable; the feeding control structure controls the radial cutting depth of the cutter; the driving part is connected with the tool rest body. The angle and the length of the conical surface of the cut cable main insulation can be controlled, quantitative adjustment of the cutting depth is achieved, the machining error is small, and the cable main insulation installation process quality is guaranteed.

The invention belongs to the technical field of high-voltage line repair, and particularly relates to a hoop device. The hoop device comprises a clamping seat, a first clamping jaw and a second clamping jaw, the clamping seat is provided with a positioning groove, the positioning groove is arranged in a penetrating mode in the second direction, and the unclosed hoop is assembled into the positioning groove; the first clamping jaw and the second clamping jaw are rotationally connected with the clamping base and located on the two sides of the first direction of the positioning groove respectively, the first clamping jaw and the second clamping jaw abut against the two ends of the unclosed hoop respectively, and the first clamping jaw and the second clamping jaw can move in the first direction in the opposite direction or the opposite directions so as to drive the two ends of the hoop to move in the opposite direction till the two ends of the hoop are closed; the first direction is perpendicular to the second direction. According to the application, the straightened twisted wire can be fixed and locked to the ground wire at the original wire slot position, the twisted wire is prevented from being separated and loosened from the original wire slot position again, the strand breaking phenomenon is further avoided, and normal work of the ground wire is guaranteed.

The invention discloses a cable head machining device of a high-voltage cable, and belongs to the field of cable head machining, the cable head machining device comprises a base, a lead screw is rotatably mounted at the upper end of the base, a first driving motor is fixedly mounted on the right side of the base, and an output shaft of the first driving motor is fixedly connected with the lead screw; two groups of guide sliding rails are fixedly mounted on the upper side of the base; through cooperative use of the above devices and the design of the stripping assembly, an insulating layer of a cable can be rapidly and efficiently stripped, the labor intensity of operators is greatly reduced, the working efficiency is improved, a gear transmission structure in the stripping assembly ensures the stability and accuracy of the stripping action, and the stripping efficiency is improved. The cable stripping device has the advantages that cable damage caused by improper operation is avoided, the cable can be stably fixed in the machining process due to the arrangement of the clamping assembly, and the situation that the stripping effect is affected due to shaking or moving of the cable is avoided.

The invention discloses a cable accessory intermediate joint expansion device, and belongs to the technical field of power equipment. The cable accessory intermediate joint expansion device comprises a first cable and a second cable which are to be connected, a fixed ring sleeve and a movable ring sleeve are arranged outside the first cable, a fixed arc plate and a movable arc plate are fixedly installed on one side of the fixed ring sleeve and one side of the movable ring sleeve respectively, and penetrating type open grooves are formed in the surfaces of the fixed arc plate and the movable arc plate. Compared with the traditional manual installation of the insulating rubber sleeve, the expansion device for the intermediate joint of the cable accessory has the advantages that the insulating rubber sleeve does not need to be contacted with the surface of the cable in the expansion installation process of the insulating rubber sleeve, huge resistance generated by friction is avoided, and the insulating rubber sleeve is prevented from twisting or locally wrinkling; the insulating rubber sleeve is uniformly and flatly coated at the joint position, the sealing and insulating effects are improved, and meanwhile, the insulating rubber sleeve can quickly move to the connecting position for coating and sealing, so that the construction efficiency is improved.

The application discloses a method for connecting an ultra-high-voltage and large-capacity submarine cable on a sea site and an installation platform thereof, and the method comprises the following steps: step 1, preparation before construction; step 2, approach of a leg pile lifting type water mobile installation platform; step 3, platform pile insertion positioning; step 4, self-lifting height adjustment; step 5, expansion of a submarine cable chute; step 6, salvage of a submarine cable end and fixation; step 7, erection of a joint manufacturing room and a purification room on the platform; step 8, cable end connection; step 9, installation of a cable soft joint protector; step 10, installation of a bending limiter; step 11, hoisting and launching of a joint; and step 12, pile pulling and site leaving. In the method, the installation platform is lifted to reduce the impact of sea waves, so that the platform is more stable, and the method has the characteristics of safety and reliability and high connection efficiency. The cable soft joint protector is improved, long-term protection function is realized, and the maintenance cost is reduced.

A mounting auxiliary device for electromechanical mounting engineering comprises a base, a cable sectioning and feeding assembly and a cable welding and coating assembly, and is characterized in that the base is a movable base, a mounting seat is supported on the base through a scissor fork type lifter, and the cable sectioning and feeding assembly comprises a sliding rail, a sliding block, a mounting frame, a vertical partition plate, a clamping and feeding mechanism and a sectioning mechanism; the cable welding and coating assembly comprises a welding base, a welding chamber is arranged in the welding base, cable penetrating holes are symmetrically formed in the positions, located on the two sides of the welding chamber, of the welding base, welding and coating mechanisms are installed in the positions, located in the welding chamber, of the welding base in an up-down symmetrical mode, and an injection feeding mechanism is installed at the top end of the welding base. The installation auxiliary device for the electromechanical installation engineering and the using method thereof have the advantages that the installation auxiliary device is simple in structure and convenient to manufacture, the fusion butt joint requirement of the cable is met, and a new sheath can be formed after the cable butt joint.