1977results about "Cable junctions" patented technology

The invention discloses a low-voltage cable branch box with protection structures at wire inlets, and belongs to the technical field of cable branch boxes, the low-voltage cable branch box comprises a box body, the interior of the box body is fixedly connected with a mounting rack for mounting electrical appliance elements through bolts, the bottom of the box body is provided with a plurality of wire inlets distributed in a linear array, and the wire inlets are arranged in the box body. The bottom of the inner wall of the box body is fixedly connected with a fixing frame corresponding to each wire inlet, and the front and back surfaces of the fixing frame are movably provided with plugging plates in a penetrating manner. The plugging plate is arranged to plug the wire inlet, and the gap sealing mechanism is arranged to fill and seal the gap between the cable and the plugging plate, so that external humid gas cannot enter the box body from the wire inlet, and when the sealing door of the box body is in a closed state, the whole branch box can be in a totally closed state; dust or humid gas in external air is prevented from entering the branch box, and electronic components in the branch box are well protected.

The invention belongs to the technical field of drilling tools, and relates to an anti-loose self-locking through cable drill rod and a locking method thereof.The drill rod comprises a drill rod body, and supporting seat mounting holes are formed in the two ends of an inner cavity of the drill rod body; the first supporting seat and the second supporting seat are arranged at the supporting seat mounting holes in the two ends of the drill rod body respectively; the first supporting seat and the second supporting seat are both of a circular ring structure, the outer ring of the circular ring structure abuts against the inner wall of the drill rod body, and the inner ring abuts against the outer ring of a through cable installed in the drill rod body. At least one of four contact surfaces, in contact with the inner wall of the drill rod body and the outer ring of the through cable, of the first supporting seat and the second supporting seat is selected as a relatively rotatable contact surface, and the other three contact surfaces are used as circumferential fixed contact surfaces; the circumferential fixed contact face is embedded into the sliding groove through the anti-rotation protrusion for circumferential locking, and the relative rotating contact face is subjected to circumferential locking through a self-locking mechanism after the through cable is installed, so that self-locking of the drill rod body and the through cable is achieved.

The invention discloses a cross-linked polyethylene insulated control cable, and relates to the technical field of cross-linked polyethylene insulated cables, the cross-linked polyethylene insulated control cable comprises an insulating shell, a notch is formed in the middle of the top surface of the insulating shell, a sealing ring and a protective sleeve are arranged in the middle of the left side and the right side of the insulating shell, and the protective sleeve is fixed on the inner wall of the sealing ring; the inner wall of the protective sleeve is provided with a tear-resistant filler, the inner wall of the tear-resistant filler is provided with a plurality of cross-linked polyethylene insulating layers, the inner walls of the cross-linked polyethylene insulating layers are provided with copper cores, the ends, close to each other, of the copper cores are fixedly connected, the insulating tape is wound on the outer walls of the copper cores, and the outer walls of the copper cores are fixedly connected with the cross-linked polyethylene insulating layers. The calcium chloride block in the top cover is conveniently replaced by a maintainer, so that the problem that the maintenance effect of the crosslinked polyethylene insulated control cable is poor due to the fact that the calcium chloride block is inconvenient to replace in the maintenance process of the crosslinked polyethylene insulated control cable is solved.

The invention relates to the technical field of power transmission, and discloses an anti-breaking insulated overhead conductor mounting structure, which comprises an insulated overhead conductor body and a mounting frame, and is characterized in that two conductor anti-pulling parts are symmetrically mounted on two sides of the top of the mounting frame; the lead anti-pulling part is used for compressing and fixing the insulated overhead lead body; a buffer part is mounted on the lead anti-pulling part, and the buffer part is used for providing a buffer space when the insulated overhead lead body is pulled; a protection part is mounted on the mounting frame and is used for surrounding the joint of the two insulated overhead conductor bodies on the inner side; through the arrangement of the buffer component, when the insulated overhead conductor body is pulled by external force, the second pulley is pressed by the insulated overhead conductor body and then moves downwards, the rotating rod rotates along the hinge point with the conductor supporting rod, and the rotating rod applies force to elastically compress the spring piece; therefore, the insulated overhead conductor body can be pulled for a certain distance.

The invention discloses a prefabricated branch cable, and relates to the technical field of cables. The device further comprises a wire inlet pipe and a protective shell. A main cable is fixedly inserted into the wire inlet pipe, the bottom end of the main cable penetrates through the bottom end of the wire inlet pipe, a branch cable is connected to the side face of the main cable, the joint of the branch cable and the main cable is wrapped with a protection piece, an installation cavity is formed in the protection shell, and the protection piece is fixedly connected into the installation cavity. The top end of the wire inlet pipe penetrates through the top wall of the protection shell. According to the prefabricated branch cable, the protection shell, the mounting cavity and the first buffer assembly are arranged, so that when the branch cable receives external pulling force, the arc-shaped plate elastically slides, the situation that the joint of the branch cable and the main cable is directly subjected to large pulling force and is damaged or even broken is avoided, the pulling resistance of the prefabricated branch cable is ensured, and the service life of the prefabricated branch cable is prolonged. Therefore, the safety and the reliability of the prefabricated branch cable are effectively improved.

The present invention discloses a high-voltage cable grounding box, comprising a box body and a wiring assembly connected to a high-voltage cable, wherein the wiring assembly is arranged inside the box body; the wiring assembly comprises a busbar and a plurality of rectangular wiring heads, wherein the plurality of wiring heads are arranged transversely on the busbar; and further comprising a heat dissipation assembly, wherein the heat dissipation assembly comprises a heat dissipation assembly, a driver and a cold row, wherein the driver and the cold row are arranged outside the box body, the heat dissipation assembly is detachably mounted on the busbar, the heat dissipation assembly is provided with a plurality of matching grooves for matching with the wiring heads, a flow channel for coolant to flow through is provided in the heat dissipation assembly, and the heat dissipation assembly, the driver and the cold row are connected in an end-to-end loop in sequence. The present invention achieves the purpose of heat dissipation by arranging a heat dissipation assembly, wherein the heat dissipation assembly comprises a heat dissipation assembly, a driver and a cold row, and the driver drives the coolant of the heat dissipation assembly to circulate between the cold row, the driver and the heat dissipation assembly, while achieving good heat dissipation effect and not damaging the sealing structure of the box body.

The application discloses a crosslinked polyethylene insulated control cable and relates to the technical field of crosslinked polyethylene insulated cables.The application comprises an insulating shell, a protection sleeve and an insulating adhesive tape.The middle of the top surface of the insulating shell is provided with a notch, and the middle of the left and right sides of the insulating shell is provided with a sealing ring.The protection sleeve is fixed on the inner wall of the sealing ring.The inner wall of the protection sleeve is provided with tear-resistant filling.The inner wall of the tear-resistant filling is provided with a plurality of crosslinked polyethylene insulation layers.The inner wall of the crosslinked polyethylene insulation layer is provided with a copper core.The copper core is fixedly connected at the end close to each other.The insulating adhesive tape is wound on the outer wall of the copper core.The calcium chloride block in the top cover can be conveniently replaced by maintenance personnel, so that the problem that the crosslinked polyethylene insulated control cable is inconvenient to replace the calcium chloride block during maintenance and causes poor maintenance effect of the crosslinked polyethylene insulated control cable is avoided.

The invention belongs to the technical field of cable connection, and particularly relates to a cable intermediate joint protection device applicable to extreme events, which comprises an upper shell, a lower shell, a secondary explosion-proof assembly and an arc extinguishing assembly, the upper shell and the lower shell are combined to form a main body shell structure, the secondary explosion-proof assembly and the arc extinguishing assembly are located in the main body shell structure, the secondary explosion-proof assembly is arranged in a central axis area of the main body shell structure, and the arc extinguishing assembly is located above the secondary explosion-proof assembly. Through the use of the secondary explosion-proof assembly, when deflagration occurs, quartz sand in a sealing rubber bag in the arc extinguishing assembly can be discharged to the outer side of the cable joint, so that the cable joint is not in contact with air, and the generation of explosion is hindered. The energy release hole upper cover sealing device plays a role in sealing the space and prevents liquid or sundries from entering the middle connector. The whole device achieves the effect of resisting extreme events.

The invention discloses an anti-winding cable interface of a low-voltage cable branch box, relates to the technical field of cable interfaces, and solves the problems of poor electrical continuity and mechanical stability and short service life during connection of the cable interface. The invention discloses an anti-winding cable interface of a low-voltage cable branch box. The anti-winding cable interface comprises a three-way cable interface shell, the external conductive assembly is arranged at the top in the three-way cable interface shell; the electric conductor is arranged in the three-way cable interface shell and is electrically connected with the external conductive component; and the assembled conductive structure is electrically connected with the conductor and is arranged at the bottom in the three-way cable interface shell. According to the invention, the cable can be combined and assembled according to the requirements of a multi-strand shunting cable in an actual circuit, and it is ensured that the laid cable meets different requirements. Meanwhile, during current transmission, the ionization phenomenon under high voltage and energy loss in the discharging process can be reduced, the current transmission efficiency is effectively improved, the electrical continuity and mechanical stability are improved to the maximum extent, and the service life is prolonged to the maximum extent.

The invention relates to the technical field of photovoltaic cable connection, in particular to a photovoltaic power cable rapid waterproof sealing connection structure which comprises a photovoltaic power cable, a cable core input positioning connector, a cable core self-positioning plug connector and a threaded connector. The cable core self-positioning plug connector comprises an external thread sealing cylinder with two open ends, a cable core self-positioning crimping mechanism is arranged in the external thread sealing cylinder in a threaded lifting mode, and the cable core self-positioning crimping mechanism comprises a positioning pressing plate which is arranged on the external thread sealing cylinder in a rotary limiting mode and moves up and down along with the external thread sealing cylinder. A group of sealing positioning screw rods are connected right below the positioning pressing plate in a lifting limiting manner, a cable core crimping connection assembly is arranged at the end part of the inner end of the cable core plugging positioning channel, and the threaded joint comprises an internal threaded rod which is in threaded connection with the interior of the bottom end of the external threaded sealing cylinder. According to the connecting structure, the cable can be quickly and automatically crimped, positioned and fixed, the whole operation is simple, the connection is stable, and the sealing performance is good.

The invention provides a cable branch box facilitating replacement of copper bars and a copper bar replacement method thereof, and relates to the technical field of electrical equipment, the cable branch box comprises a branch box body, and an input conductor, a plurality of output conductors and a plurality of copper bar plugging mechanisms are arranged in the branch box body. The cable branch box with the copper bars convenient to replace has the beneficial effects that the cable branch box can realize one-to-many connection of the input conductors through the copper bar plugging mechanism, and the copper bar plugging mechanism is firm and reliable in conductive connection and can quickly realize installation and separation of the main copper bars; the main copper bar and the input conductor are separated at the same time, so that the main copper bar is convenient to separate, the main copper bar is convenient to replace, and the generation of electric arc is avoided. The plate plugging mechanism can rapidly realize point separation of the main copper bar in a mode of sliding upwards and then sliding downwards, and in combination with a mode of sliding conductive connection of the auxiliary copper bar, rapid power-off replacement of the main copper bar can be realized, and continuous power supply in the replacement process of the main copper bar can also be realized.

The invention relates to the technical field of protection assemblies, in particular to an electric power engineering cable connector protection assembly which comprises a base, cable connecting pieces oppositely arranged on the base and a protection pipe connected between the cable connecting pieces, the cable connecting pieces are installed on the base in a sliding mode, and the protection pipe can be installed between the cable connecting pieces in a spliced mode; the cable connecting piece comprises a connecting base and a holding base which are arranged outside a cable in a sleeving mode, a deformation part is formed at the position, close to one end, of the outer side face of the connecting base, an extrusion part matched with the deformation part is arranged in the holding base, and when the holding base is connected to the connecting base in a threaded mode, the extrusion part is driven to extrude the deformation part, so that the deformation part holds the cable tightly. According to the cable connector assembly, the cable connectors are held and fixed outside the cable, at the moment, the protection tube is installed between the two opposite cable connectors through splicing, so that the protection tube protects the cable connector, the protection tube does not move along the cable when the protection tube is installed between the cable connectors, and the protection effect of the protection tube on the cable connector is better.

The invention discloses a quick connection type combined cable joint, and relates to the technical field of cable joints, the quick connection type combined cable joint comprises a cable joint body and two rotating assemblies, the cable joint body is internally provided with a connecting conductor used for ensuring electrical connection between cables; according to the quick-connection type combined cable joint, when two cables need to be connected, one end of one cable is inserted into one communicating pipe, and a plurality of cutters move along the vertical direction of the cable, so that the part outside a metal layer of the cable is scratched; then the cutting knife is rotated along the circumference of the cable to realize all-directional cutting of the part, needing to be peeled, of the cable, namely, the skin of the part, needing to be cut, of the cable can be separated from other parts of the cable, at the moment, the cable can be pulled out of the communicating pipe, and a worker can manually strip the skin of the cut part of the cable; the metal part in the cable is completely exposed, which is convenient and fast.

The utility model relates to the technical field of cable connection, in particular to a cable with a clamping butt joint, which comprises a first cable, the right side of the first cable is provided with a first connector, the surface of the first connector is provided with a thread groove, and the surface of the first connector is fixedly sleeved with a fixing ring. According to the utility model, the second connector is inserted into the first connector, the second magnet is attracted under the action of the magnetic force of the first magnet, so that the second magnet is in contact with the first magnet, the second magnet is fixed in the clamping groove through the first magnet, and the first connector and the second connector are positioned through the clamping groove and the second magnet; the first connector and the second connector are connected and fixed, after connection is completed, the threaded sleeve is rotated to make transverse movement on the surface of the threaded groove, the telescopic sleeve is extruded through the threaded sleeve, and gas in the telescopic sleeve is injected into the closed air bag through the second connector.

The present application relates to the technical field of submarine cable fittings, and provided are a submarine cable joint box and a submarine cable system. Two submarine cables are connected by means of an intermediate connector. The submarine cable joint box comprises: sealing ends, a sealing cylinder and a heat shrink tube. The sealing cylinder is sleeved on the intermediate connector; the sealing ends are respectively sleeved on the submarine cables at the two ends of the intermediate connector; two ends of the sealing cylinder are respectively in sealed connection with the corresponding sealing ends. The two sealing ends, the sealing cylinder and the intermediate connector form an accommodation chamber, and the accommodation chamber is filled with a waterproof sealant. The heat shrink tube is sleeved on the sealing cylinder and the sealing ends, and two ends of the heat shrink tube are in heat shrink connection with the submarine cables at the two ends respectively. The present application uses the mode of combining the sealing ends and the heat shrink tube to perform double sealing, thus improving the sealing performance of the repair joint box in deepwater areas.

The utility model discloses a high-voltage cable joint accessory with an insulation sleeve, which comprises a joint body, the joint body is installed on external equipment, a fixing mechanism is arranged on the joint body, and the fixing mechanism comprises a fixing sleeve, a clamping mechanism, a positioning disc, a fixing disc, a push disc, a clamping rod, an adjusting mechanism, a clamping head and a cable body. The fixing sleeve is installed on the connector body, the adjusting mechanism is installed on the fixing sleeve and the positioning disc, the matching of the fixing sleeve and the positioning disc ensures the accurate position of a cable during fixing, the sliding connection of the push disc and the clamping rod provides a flexible fixing mode, and the arrangement of the spring enables the clamping rod to automatically adapt to different cables. And the adaptability and the stability of the fixing mechanism are improved, so that the reliability of cable connection is ensured.

The invention provides a rapid waterproof sealing connection structure for a photovoltaic power cable, and relates to the field of cable connection. The rapid waterproof sealing connection structure for the photovoltaic power cable comprises a supporting cylinder, two telescopic cylinders are installed in the supporting cylinder in a sliding mode, cutting assemblies are installed on the side walls of the telescopic cylinders, and stretching assemblies are installed between the supporting cylinder and the two telescopic cylinders. And a cable body is mounted in the telescopic cylinder and the cutting assembly on the same side. The cutting assembly comprises a first disc, a second disc, a straight sliding groove, an arc-shaped guide groove, a cutting knife and a guide rod, the first disc is fixedly connected to the end, away from the supporting barrel, of the telescopic barrel, an insulating layer is stripped through the cutting assembly, a conductor is driven by the stretching assembly to be in accurate butt joint, the insulating layer is pressed by the sealing sleeve and the conical block, and sealing is reinforced in cooperation with an external adhesive tape. The problems of conductor damage, complicated steps and poor sealing of traditional butt joint wire stripping are solved, and efficient, accurate and waterproof butt joint of cables is realized.

The invention discloses a sealing protection device for an intermediate joint of a cable for power transmission, relates to the technical field of sealing protection devices, solves the technical problem of sealing, and comprises a first protection cylinder and a second protection cylinder which are both internally provided with grooves. A fixing plate is fixedly installed at the corresponding ends of the first protection cylinder and the second protection cylinder, the fixing plate is fixedly installed in the groove, and sealing assemblies are arranged in the first protection cylinder and the second protection cylinder; the sealing assembly comprises a moving ring slidably mounted in the groove, an air bag is fixedly mounted on the side, away from the fixing plate, of the moving ring, an extrusion ring is fixedly mounted on the side, away from the air bag, of the moving ring, a sealing gasket is rotatably mounted at the end, away from the moving ring, of the extrusion ring, and a guide rod is slidably mounted on the moving ring in a penetrating mode. Sealing operation is facilitated, the sealing capacity of the device can be improved, and the safety protection capacity of the device can be improved.

A lead assembly includes first and second feeder cables and multiple drop lines. The feeder cables each has a first or second diameter and a first or second polarity. Each of the feeder cables contains two or more joints. Each joint electrically couples one or more drop lines to the first or second feeder cable at a nexus. Each drop line has a diameter that is less than the first diameter and less than the second diameter. Each drop line coupled to the first feeder cable is configured to be electrically connected to a wire harness configured to electrically connect to an array of solar panels. Two or more of the droplines that are connected to the first feeder cable each includes an in line fuse disposed between the joint and the wire harness. Each joint has a mold enclosure configured to enclose at least a portion of the nexus.

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.

The utility model discloses a security equipment cable fastening device, which comprises a fastening ring and two extension sleeves, the two ends of the fastening ring are both nested with the extension sleeves, the inner wall of the fastening ring is provided with an annular groove, the two sides of the annular groove are both nested with transverse plates, and an inflatable rubber lantern ring is fixedly arranged between the two transverse plates. And the inflatable rubber lantern ring is arranged in the annular groove. According to the utility model, the inflatable rubber sleeve ring is arranged in the fastening ring, the connecting end of a security equipment cable can be in close contact and fixed, the protection length of the connecting end is increased through the cooperation of the two extension sleeves, and the locking sheets are arranged at the ends of the two extension sleeves, so that the cable is further locked, and the safety of the cable is improved. The fastening performance of the cable joint part is improved, and the problem of poor contact caused by overlarge tension at the cable joint part is reduced.

The utility model relates to a telescopic seabed emergency repair adapter of a bending limiter, which comprises a first joint, a second joint, a first telescopic cylinder and a second telescopic cylinder, a telescopic structure is arranged between the first telescopic cylinder and the second telescopic cylinder, and the first telescopic cylinder and the second telescopic cylinder are telescopically lapped together. The telescopic structure enables the length of the first telescopic cylinder and the second telescopic cylinder which are lapped together to change; the first connector and the second connector are the same in structure, the first connector is assembled at one end of the first telescopic cylinder, and the second connector is assembled at one end of the second telescopic cylinder. The telescopic seabed first-aid repair adapter of the bending limiter is simple in structure, easy to operate, high in stability and high in adaptability due to the fact that the telescopic length is variable, and when first-aid repair personnel conduct seabed first-aid repair, operation is easy and convenient, consumed time is short, and safety and reliability are achieved.

A lead assembly includes a feeder cable, a drop line cable with first and second drop lines, and one or more mold structures disposed about and enclosing a region of electrical interconnection between the feeder cable and the drop line cable. The first drop line terminates at a first drop line connector configured for detachable connection to a wire harness having multiple branches that are each configured to receive electrical power generated by a corresponding PV panel. The second drop line terminates at a second drop line connector. The mold structure(s) are disposed about and enclose a region of electrical interconnection between the feeder cable and the drop line cable. In the region of electrical interconnection, at least a portion of the drop line cable extends along a longitudinal axis that is parallel to a longitudinal axis of at least a portion of the feeder cable.

A cable gland has first and second parts, which are mutually engageable, and a seal assembly that is housed within and between the first and second parts. The seal assembly has at least one carrier on each side of a cable seal. Each carrier seats a respective body seal. Each cable seal has an opening through which a cable can pass. In use the cable seal forms a seal about the cable. Each body seal is arranged to form a respective seal against the inner surface of the first. The cable seals provide water ingress protection about the cable, while the body seals provide water ingress protection between the inside of the first part and the seal assembly. The parts and, when engaged, are configured to apply a longitudinal compression to the seal assembly. This results in the carriers squeezing the cable seal therebetween into sealing contact with and about an outer surface of the cable. This, in combination with the action of the body seals provides water ingress protection.

The invention relates to the field of cables, and discloses an electrical wiring insulation protection device which is characterized in that a containing cavity for containing a cable is formed in the middle of a protection sleeve main body, end sleeves are arranged at the two ends of the protection sleeve main body, and a gas protection device is arranged in the radial direction of the protection sleeve main body; the inner side wall of the end sleeve drives the clamping block to clamp a cable through the screw rod, and meanwhile, the clamping block drives the piston structure to move so as to discharge gas in the piston cavity into the air bag, and the air bag expands to extrude the sealing ring so as to seal the accommodating cavity; the gas protection device extracts air in the containing cavity and inputs protection gas into the containing cavity. The position of the cable is stabilized through the sealing ring and the clamping block, sealing of the containing cavity is achieved, external substances are prevented from entering the containing cavity, it can be guaranteed that the containing cavity is filled with protective gas in cooperation with the gas protection device, and therefore insulation protection of the cable connecting position is achieved, and safety and stability of the cable connecting position are guaranteed.

The invention relates to an accident and fire precursor detection system, in particular to a system for automatically detecting overheating of an electrical equipment component, a method of using the same and a testing method. An electrical equipment element overheating automatic detection system comprises a gas sensor used for detecting gas released when a controlled element or a thermal activation gas emission material installed on the controlled element is heated; a controller associated with or combined with the gas sensor has a function of generating an overheat alarm and / or transmitting overheat information to other devices when the controlled element is heated, which function can be achieved when the sensor is affected by gas released when the controlled element is heated or a thermally activated gas release material mounted thereon, and meanwhile, the existence of background gas in the controlled area is considered. Meanwhile, the invention discloses a testing method of the system and a method for automatically detecting overheating of an electrical equipment element. According to the invention, by timely detecting the defect that the electrical equipment is overheated, the operation reliability and safety of the electrical equipment are improved.

The invention discloses a cable head insulation paste reinforced cable, which relates to the technical field of cables, and comprises a main body mechanism, and the outer surface wall of the main body mechanism is movably sleeved with a protection mechanism; the protection mechanism comprises a protection sleeve; in the assembly process of the cable and the connector, the protective sleeve achieves accurate clamping through a linkage structure of gear transmission and rack pushing, after an arc-shaped plate drives a clamping block to be tightly attached to the protective layer, a spring drives a piston to extrude liquid insulation glue in a glue storage cavity, and the liquid insulation glue penetrates through a sealing film to form a uniformly-covered curing composite layer; the cured adhesive layer and the clamping block have a synergistic effect, and have multiple protection characteristics of isolating moisture permeation, strengthening connection rigidity and dispersing external impact, so that deterioration of insulation performance of a joint caused by invasion of water vapor or external pollutants can be effectively prevented, and contact resistance fluctuation caused by a vibration environment is also remarkably inhibited due to enhanced mechanical stability.

The invention provides a cable branch box cooling system, and relates to the technical field of electric power facilities, the cable branch box cooling system comprises a heat conduction rod, the heat conduction rod is arranged in a cable branch box, and one end of the heat conduction rod abuts against a heating element in the cable branch box; the heat transfer rod is arranged outside the cable branch box, and one end of the heat transfer rod is inserted into underground soil; wherein the side wall of the cable branch box is recessed inwards, so that a groove is formed in the outer side of the box body, a boss is formed in the inner side of the box body, and one end, close to the side wall of the box body, of the heat conducting rod and one end, close to the side wall of the box body, of the heat transfer rod are embedded into the groove and fixed to the outer side of the boss in a sleeving mode respectively. The heat conduction rod and the heat transfer rod are arranged in a hollow mode and internally provided with cooling liquid. The cable branch box cooling system solves the problem that a cable branch box cooling system which is low in cost, energy-saving and high in heat dissipation efficiency is lacked in the prior art.

The invention provides a multifunctional intermediate joint capable of being connected with a cable, and relates to the technical field of cable accessories. The multifunctional intermediate joint capable of connecting the cable comprises a joint body, an operation and maintenance hand-held terminal based on RFID and GPS, and an Internet of Things platform. In the case of instantaneous overload or short circuit, the PCM quickly absorbs heat to delay temperature rise, and the axial flow fan forcibly cools air to discharge heat, so that insulation carbonization is avoided; the self-cleaning mechanism removes dust on the filter screen to ensure stable long-term heat dissipation; the STM32H743VIT6 is fused with temperature, mechanical stress, partial discharge data and time-frequency domain alignment, so that the insulation failure prediction precision is improved; the dual-frequency anti-metal RFID tag, UWB positioning and AR operation and maintenance terminal are linked to display the health state, the deterioration trend and the maintenance animation of the connector in real time, so that the inspection time is greatly shortened, and misoperation is reduced; the Internet of Things platform remotely calls edge calculation data, experts collaboratively mark AR pictures, and the fault response speed is increased; and a sensing-analysis-decision-execution intelligent operation and maintenance system is constructed.