CN111403974A - Spiral cable switching device - Google Patents
Spiral cable switching device Download PDFInfo
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- CN111403974A CN111403974A CN202010133873.5A CN202010133873A CN111403974A CN 111403974 A CN111403974 A CN 111403974A CN 202010133873 A CN202010133873 A CN 202010133873A CN 111403974 A CN111403974 A CN 111403974A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Cable Accessories (AREA)
Abstract
The invention relates to a cable switching device applied to a novel bypass cable operation method of a distribution network line ring main unit. Spiral cable switching device, its characterized in that: the cable fixing device comprises a binding post, an insulating outer cylinder, a screw, a cable guide pipe, an insulating fixing sleeve, a conductive insertion rod and a fastening nut; the right end part of the binding post is provided with a locking block, the inner wall of the insulating outer barrel in the barrel hole is provided with a straight sliding chute and an arc sliding chute, the straight sliding chutes are arranged along the left and right direction, the number of the arc sliding chutes corresponds to the number of the locking blocks, and the arc sliding chutes are communicated with the straight sliding chutes; one end part of the cable passes through the tube hole and the cable hole and then is positioned in the tube hole; the left part of the screw rod is positioned in the barrel hole after penetrating through the screw rod hole, the fastening nut is screwed on the screw rod and positioned in the barrel hole, the left end part of the screw rod is screwed into the screw hole of the conductive insertion rod after penetrating through the screw rod hole on the cable, and the cable is fixed on the conductive insertion rod by the fastening nut. The device has the characteristics of simple structure and convenient use.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a cable switching device applied to a novel bypass cable operation method of a distribution network line ring main unit.
Background
The bypass cable operation technology is mostly applied to the isolation of the ring main unit to be overhauled by a simple bridging bypass operation method in the early stage. The customer is supplied with power through a temporary power grid established by the bypass device. However, in the actual situation of the distribution line, the distance between two ring main units of the distribution network is often hundreds of meters, even more than kilometers, and the laying distance of the bypass cable line needs to exceed 500 meters according to the method introduced in the 10kV cable line uninterrupted operation instruction book. And the long laying distance of the bypass cable line can bring about several problems: (1) safety problem, present bypass cable line lays and generally adopts open-air earth's surface to lay, in order to prevent pedestrian, vehicle destruction, needs arrange personnel's guard specially, in case the circuit overlength, the guard personnel are not enough, and the potential safety hazard can increase by a wide margin. (2) The efficiency problem, the distribution network line is direct to the general short, efficient time of requirement of user's maintenance work. According to the operation experience of the bypass cable, the distance of laying the bypass cable of 300 meters needs more than 3 hours. This is clearly contrary to the original intention of carrying out bypass cable work. (3) Cost issues, well known. The basic configuration purchase cost of a set of bypass cable operation equipment with the operation distance of 300 meters is about 200 ten thousand, once the operation distance is multiplied, the equipment purchase cost is correspondingly increased, and therefore the equipment purchase cost cannot be borne by common power supply enterprises. In addition, long-distance cable laying service necessarily causes increase of operators, and labor cost of the operators is also increased.
Disclosure of Invention
The invention aims to provide a spiral cable switching device which has the characteristics of simple structure and convenience in use.
In order to achieve the purpose, the invention adopts the technical scheme that: spiral cable switching device, its characterized in that: the cable fixing device comprises a binding post, an insulating outer cylinder, a screw, a cable guide pipe, an insulating fixing sleeve, a conductive insertion rod and a fastening nut; the binding post is a conductor and is connected with a power supply contact of a ring main unit or a transformer to be connected, a jack is arranged in the right end of the binding post, a locking block is arranged at the right end of the binding post, and the outer diameter of the binding post is 0-4mm smaller than the inner diameter of a cylinder hole of the insulating outer cylinder; a cylinder hole is formed in the insulating outer cylinder, the right end part of the insulating outer cylinder is a closed end part, a screw hole is formed in the closed end part, and the screw hole is communicated with the cylinder hole; the inner wall of the insulating outer barrel in the barrel hole is provided with straight chutes and arc chutes, the straight chutes are arranged along the left and right directions, the number of the arc chutes corresponds to the number of the locking blocks, and the distance between the adjacent straight chutes corresponds to the distance between the adjacent locking blocks; the arc-shaped sliding chute is arc-shaped and is communicated with the straight sliding chute; the conductive insertion rod is positioned in the cylindrical hole, a screw hole is formed in the right end of the conductive insertion rod, and the diameter of the conductive insertion rod is 0-2mm smaller than that of the insertion hole; a cable guide pipe is fixed at the right part of the insulating outer cylinder, a cable hole is formed in the right part of the insulating outer cylinder and communicated with a pipe hole of the cable guide pipe, a screw hole is formed in one end part of the cable, and one end part of the cable penetrates through the pipe hole and the cable hole and then is positioned in the pipe hole; the left part of the screw rod is positioned in the barrel hole after penetrating through the screw rod hole, the fastening nut is screwed on the screw rod and positioned in the barrel hole, the left end part of the screw rod is screwed into the screw hole of the conductive insertion rod after penetrating through the screw rod hole on the cable, and the cable is fixed on the conductive insertion rod by the fastening nut.
And a conductive spring is fixed at the left end in the jack.
The invention has the beneficial effects that: the device has the characteristics of simple structure and convenient use.
Drawings
Fig. 1 is a schematic connection diagram of a conventional network distribution line ring main unit.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is a schematic structural diagram of one of the other cable transition devices.
Fig. 4 is a schematic structural diagram of another cable adapter.
Fig. 5 is a schematic structural diagram of the present invention.
Fig. 6 is a schematic structural diagram of the ring main unit cable double-wiring base according to the present invention.
Fig. 7 is a schematic structural diagram of another cable adapter.
Fig. 8 is a schematic view of the core chuck of the present invention.
FIG. 9 is a schematic structural diagram of another cable adapter.
In the figure: 1-a first ring main unit, 2-a second ring main unit, 3-a third ring main unit, 4-a transformer, 5-a vehicle-mounted ring main unit, 6-an input cable of the vehicle-mounted ring main unit, 7-a vehicle, 8-a transformer cable of the vehicle-mounted ring main unit, 9-an output cable of the vehicle-mounted ring main unit, 10-a wiring terminal, 11-a jack, 12-an insulating outer cylinder, 13-a cylinder hole, 14-a screw, 15-a cone, 16-a threaded through hole, 17-a screw hole, 18-a bearing, 19-a first rotary jack, 20-a cable guide pipe, 21-a pipe hole, 22-a cable, 23-an insulating fixing sleeve, 24-a conductive inserted rod, 25-an outer baffle ring, 26-a straight chute, 27-an arc chute and 28-a ring disc, 29-sliding block, 30-conductive arc-shaped clamping piece, 31-second rotary socket, 32-insulating support frame, 33-jacking device, 34-vertical sliding chute, 35-vertical rod, 36-upper clamping rod, 37-overhead line cable, 38-lower clamping rod, 39-fastening nut, 40-locking block, 41-cable connecting through hole, 42-ring main unit, 43-cable connecting jack, 43-1-A phase first jack, 43-2-A phase second jack, 43-3-B phase first jack, 43-4-B phase second jack, 43-5-C phase first jack, 43-6-C phase second jack, 44-main insulating cylinder, 45-main insulating cylinder through hole, 46-first inner core chuck, 47-a second inner core chuck, 48-an auxiliary insulation cylinder, 49-an auxiliary insulation cylinder through hole and 50-a cable of the ring main unit.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 5, the spiral cable adapter includes a terminal 10, an insulating outer cylinder (insulating sheath) 12, a screw 14, a cable guide tube 20, an insulating fixing sleeve 23, a conductive insertion rod 24, and a fastening nut 39; the binding post 10 is a conductor (the material of the binding post 10 is a conductive material), and the binding post 10 is connected with a power contact of a ring main unit or a transformer to be connected { the connection mode can be one of the following: 1. as shown in fig. 6, the wiring base of the ring main unit is changed into a cable double-wiring base of the ring main unit, namely: the ring main unit cable double-wiring base is respectively provided with 6 cable access jacks 43 which are respectively an A-phase first jack 43-1, an A-phase second jack 43-2, a B-phase first jack 43-3, a B-phase second jack 43-4, a C-phase first jack 43-5 and a C-phase second jack 43-6, the wiring ends of an A-phase, a B-phase and a C-phase live wire are respectively connected with 2 cable access jacks, and the wiring terminal 10 is inserted into an empty cable access jack to realize online connection (namely, no power failure); 2. it is also possible to use: the binding post 10 is provided with a power cable connection point (in a conventional method, a power cable insertion hole is usually adopted, a power cable to be connected is inserted, then a screw is screwed into the screw to press the power cable tightly, and the power cable is fastened by the screw); the binding post 10 can be fixed on a wiring base of the ring main unit }, a jack 11 (the right side of fig. 5 is right) is arranged in the right end of the binding post 10, a locking block 40 is arranged at the right end of the binding post 10, and the outer diameter of the binding post 10 is smaller than the inner diameter of a barrel hole 13 of the insulating outer barrel by 0-4mm (namely the right part of the binding post 10 can be inserted into the barrel hole 13); a cylinder hole 13 is arranged in the insulating outer cylinder 12, the right end part of the insulating outer cylinder 12 is a closed end part, the closed end part is provided with a screw hole 17, and the screw hole 17 is communicated with the cylinder hole 13 (or a closed plate is fixed at the right end of the insulating outer cylinder 12 and provided with a screw hole);
the inner wall of the insulating outer cylinder 12 in the cylinder hole 13 is provided with straight chutes 26 and arc chutes 27, the straight chutes 26 are arranged along the left and right direction, the number of the arc chutes 27 corresponds to the number of the locking blocks 40 (the number of the locking blocks 40 is preferably 2-3), and the distance between the adjacent straight chutes 26 and the straight chutes 26 corresponds to the distance between the adjacent locking blocks 40 and the locking blocks 40; the arc chute 27 is arc-shaped, and the arc chute 27 is communicated with the straight chute 26 (the lock block 40 can slide in the straight chute 26 and the arc chute 27, namely the size of the lock block 40 is smaller than that of the straight chute 26 and the arc chute 27);
the conductive inserted bar 24 is positioned in the cylinder hole 13, the right end of the conductive inserted bar 24 is provided with a screw hole, and the diameter of the conductive inserted bar 24 is 0-2mm smaller than that of the jack 11 (namely, the left part of the conductive inserted bar 24 can be inserted into the jack 11); a cable guide pipe 20 is fixed at the right part of the insulating outer cylinder 12, a cable hole is formed at the right part of the insulating outer cylinder 12, the cable hole is communicated with a pipe hole 21 of the cable guide pipe 20, a screw rod hole is formed at one end part of the cable 22 (or one end part of the cable 22 is connected with a conductive ring sheet), and one end part of the cable 22 penetrates through the pipe hole 21 and the cable hole and then is positioned in the cylinder hole 13;
the left part of the screw 14 passes through the screw hole 17 and then is positioned in the barrel hole 13, the fastening nut 39 is screwed on the screw 14, the fastening nut 39 is positioned in the barrel hole 13, the left end part of the screw 14 passes through the screw hole on the cable 22 and then is screwed into the screw hole of the conductive insert rod 24, and the fastening nut 39 fixes the cable 22 on the conductive insert rod 24 (the fastening nut 39 is positioned at the right side of the screw hole on the cable 22).
The right end of the screw 14 may be provided with a first rotary socket (e.g., a cross-shaped groove, a straight groove; or a polygonal projection) 19 (i.e., the screw 14 may be rotated by a tool). A conductive spring may be fixed to the left end in the insertion hole 11, and the left end of the conductive insertion rod 24 is in contact with the conductive spring in order to enhance the contact (electrical connection) of the conductive insertion rod 24 with the terminal 10.
When the electric connector is used, the insulating outer cylinder 12 moves towards the terminal 10, the terminal 10 is inserted into the cylinder hole 13, the locking block 40 is inserted into the straight sliding groove 26, and the left part of the conductive inserted rod 24 is inserted into the jack 11 (electrical connection is achieved); the insulating outer cylinder 12 is rotated, and the locking piece 40 enters the arc-shaped sliding groove 27 to connect the insulating outer cylinder 12 with the binding post 10 (spiral connection mode). When the insulation outer cylinder 12 needs to be disconnected, the locking block 40 is withdrawn from the arc-shaped sliding groove 27 by rotating the insulation outer cylinder 12 reversely, the insulation outer cylinder 12 is pulled rightwards, the insulation outer cylinder 12 leaves the wiring terminal 10, and the conductive insertion rod 24 is pulled out from the insertion hole 11, so that the insulation outer cylinder 12 is separated from the wiring terminal 10.
As shown in fig. 1, fig. 2 and fig. 5, an application of the spiral cable switching device (or called as a novel bypass cable operation method applied to a ring main unit of a distribution network line) includes the following steps:
1) preparing a micro power supply power network system, wherein the micro power supply power network system comprises an automobile 7, a vehicle-mounted ring main unit 5 and a cable switching device; the vehicle-mounted ring main unit 5 is arranged on the automobile 7;
2) when a certain ring main unit (such as the second ring main unit 2) on the distribution network line needs to be replaced or repaired, the automobile 7 with the vehicle-mounted ring main unit 5 reaches the ring main unit (such as the second ring main unit 2), an input cable and an output cable of the ring main unit are disconnected, and a transformer cable connecting the ring main unit and the transformer 4 is disconnected; an input cable 6 of the vehicle-mounted ring main unit is connected with an output end of the previous adjacent ring main unit (such as a first ring main unit 1) by a cable switching device, a transformer cable 8 of the vehicle-mounted ring main unit is connected with a transformer 4 connected with the ring main unit by the cable switching device, and an output cable 9 of the vehicle-mounted ring main unit is connected with an input end of the next adjacent ring main unit (such as a third ring main unit 3) by the cable switching device;
3) after the ring main unit (such as the second ring main unit 2) is replaced or repaired, disconnecting the input cable 6 of the vehicle-mounted ring main unit, the transformer cable 8 of the vehicle-mounted ring main unit and the output cable 9 of the vehicle-mounted ring main unit;
the input cable of the replaced or repaired ring main unit is connected with the output end of the adjacent previous ring main unit (such as the first ring main unit 1), the output cable of the replaced or repaired ring main unit is connected with the input end of the adjacent next ring main unit (such as the third ring main unit 3), and the transformer cable of the replaced or repaired ring main unit is connected with the transformer 4.
The cable transition device can also adopt one of other structural forms:
as shown in fig. 3, the cable adapter (or inner ring expansion cable adapter) includes a terminal 10, an insulating outer cylinder (or insulating outer sleeve) 12, a screw 14, a cone 15, a bearing 18, and a cable guide tube 20; the binding post 10 is a conductor (the material of the binding post 10 is a conductive material), and the binding post 10 is connected with a power contact of a ring main unit or a transformer to be connected { the connection mode can be one of the following: 1. as shown in fig. 6, the wiring base of the ring main unit is changed into a cable double-wiring base of the ring main unit, namely: the ring main unit cable double-wiring base is respectively provided with 6 cable access jacks 43 which are respectively an A-phase first jack 43-1, an A-phase second jack 43-2, a B-phase first jack 43-3, a B-phase second jack 43-4, a C-phase first jack 43-5 and a C-phase second jack 43-6, the wiring ends of an A-phase, a B-phase and a C-phase live wire are respectively connected with 2 cable access jacks, and the wiring terminal 10 is inserted into an empty cable access jack to realize online connection (namely, no power failure); 2. it is also possible to use: the binding post 10 is provided with a power cable connection point (in a conventional method, a power cable insertion hole is usually adopted, a power cable to be connected is inserted, then a screw is screwed into the screw to press the power cable tightly, and the power cable is fastened by the screw); the binding post 10 can be fixed on a wiring base of the ring main unit, and a jack 11 (the right side of fig. 3 is right) is arranged in the right end of the binding post 10; a cylinder hole 13 is arranged in the insulating outer cylinder 12, the diameter of the cylinder hole 13 is 0-4mm larger than that of the binding post 10 (namely, the right part of the binding post 10 can be inserted into the cylinder hole 13), the right end part of the insulating outer cylinder 12 is a closed end part, a screw hole 17 is arranged at the closed end part, and the screw hole 17 is communicated with the cylinder hole 13 (or, a closed plate is fixed at the right end of the insulating outer cylinder 12 and provided with a screw hole); the cone 15 is positioned in the barrel hole 13, the small head end of the cone 15 is positioned on the left side, the outer diameter of the small head end of the cone 15 is smaller than the inner diameter of the jack 11, and the outer diameter of the large head end of the cone 15 is larger than the inner diameter of the jack 11; a threaded through hole 16 matched with the screw rod is arranged in the cone 15; the cone 15 is screwed on the left end part of the screw 14, the right end part of the screw 14 passes through the screw hole 17 and is positioned outside the insulating outer cylinder 12, the right end part of the screw 14 is provided with a first rotary socket (such as a cross-shaped groove, a straight-line-shaped groove, or a polygonal bump) 19 (namely, the screw 14 can be rotated by a tool), the right part of the screw 14 is provided with a bearing 18, and the bearing 18 is fixed in the screw hole 17 (the screw 14 can rotate, and the cone 15 moves left and right); a cable guide tube 20 is fixed at the right part of the insulating outer cylinder 12, a cable hole is formed in the right part of the insulating outer cylinder 12, the cable hole is communicated with a tube hole 21 of the cable guide tube 20, one end of a cable 22 penetrates through the tube hole 21 and the cable hole and then is fixedly connected with the cone 15, and the cone 15 is a conductor (the cone 15 is made of a conductive material).
When the electric connector is used, the insulating outer cylinder 12 moves towards the terminal 10, the terminal 10 is inserted into the cylinder hole 13, the cone 15 is inserted into the jack 11, the screw 14 is rotated by a tool (sleeved or inserted into the first rotary socket 19), the cone 15 moves leftwards, and the cone 15 is tightly connected with the terminal 10, namely, the electric connection is realized. When the disconnection is needed, the screw 14 is rotated in the opposite direction by a tool, the cone 15 moves rightwards, the cone 15 leaves the terminal 10, the insulating outer cylinder 12 moves rightwards, and the insulating outer cylinder 12 leaves the terminal 10.
In fig. 3-5, the cable 22 includes one of an input cable 6 of the on-board ring main unit, a transformer cable 8 of the on-board ring main unit, and an output cable 9 of the on-board ring main unit. The cables (input cable, transformer cable and output cable) of the vehicle-mounted ring main unit adopt flexible cables.
The cable switching device can also adopt the second other structural form:
as shown in fig. 4, the cable adapter (or built-in bolt cable adapter) includes a terminal 10, an insulating outer cylinder (insulating sheath) 12, a screw 14, a cable guide tube 20, an insulating fixing sleeve 23, a conductive inserted link 24, and a fastening nut 39; the binding post 10 is a conductor (the material of the binding post 10 is a conductive material), and the binding post 10 is connected with a power contact of a ring main unit or a transformer to be connected { the connection mode can be one of the following: 1. as shown in fig. 6, the wiring base of the ring main unit is changed into a cable double-wiring base of the ring main unit, namely: the ring main unit cable double-wiring base is respectively provided with 6 cable access jacks 43 which are respectively an A-phase first jack 43-1, an A-phase second jack 43-2, a B-phase first jack 43-3, a B-phase second jack 43-4, a C-phase first jack 43-5 and a C-phase second jack 43-6, the wiring ends of an A-phase, a B-phase and a C-phase live wire are respectively connected with 2 cable access jacks, and the wiring terminal 10 is inserted into an empty cable access jack to realize online connection (namely, no power failure); 2. it is also possible to use: the binding post 10 is provided with a power cable connection point (in a conventional method, a power cable insertion hole is usually adopted, a power cable to be connected is inserted, then a screw is screwed into the screw to press the power cable tightly, and the power cable is fastened by the screw); the binding post 10 can be fixed on a wiring base of the ring main unit }, a jack 11 (the right side of fig. 4 is the right side) is arranged in the right end of the binding post 10, an external thread is arranged at the right part of the binding post 10, and the external diameter of the binding post 10 corresponds to the external diameter of the insulating outer cylinder; a cylinder hole 13 is arranged in the insulating outer cylinder 12, the right end part of the insulating outer cylinder 12 is a closed end part, the closed end part is provided with a screw hole 17, and the screw hole 17 is communicated with the cylinder hole 13 (or a closed plate is fixed at the right end of the insulating outer cylinder 12 and provided with a screw hole); an outer baffle ring 25 is arranged at the left end of the insulating outer cylinder 12, an insulating fixing sleeve 23 is sleeved at the left part of the insulating outer cylinder 12, an inner baffle ring is arranged in the right end of the insulating fixing sleeve 23, the inner diameter of the inner baffle ring is smaller than the outer diameter of the outer baffle ring 25 (namely the outer baffle ring 25 can prevent the insulating fixing sleeve 23 from leaving from the left end of the insulating outer cylinder 12), and an inner thread matched with the outer thread on the binding post 10 is arranged in the insulating fixing sleeve 23; the left part of the conductive inserted rod 24 is positioned outside the insulating outer cylinder 12 (the left part of the conductive inserted rod 24 can be inserted into the jack 11), the right part of the conductive inserted rod 24 is positioned in the cylinder hole 13, the right end of the conductive inserted rod 24 is provided with a screw hole, and the diameter of the conductive inserted rod 24 is smaller than the diameter of the jack 11 by 0-1mm (namely the left part of the conductive inserted rod 24 can be inserted into the jack 11); a cable guide pipe 20 is fixed at the right part of the insulating outer cylinder 12, a cable hole is formed at the right part of the insulating outer cylinder 12, the cable hole is communicated with a pipe hole 21 of the cable guide pipe 20, a screw rod hole is formed at one end part of the cable 22 (or one end part of the cable 22 is connected with a conductive ring sheet), and one end part of the cable 22 penetrates through the pipe hole 21 and the cable hole and then is positioned in the cylinder hole 13;
the left part of the screw 14 passes through the screw hole 17 and then is positioned in the barrel hole 13, the fastening nut 39 is screwed on the screw 14, the fastening nut 39 is positioned in the barrel hole 13, the left end part of the screw 14 passes through the screw hole on the cable 22 and then is screwed into the screw hole of the conductive insert rod 24, and the fastening nut 39 fixes the cable 22 on the conductive insert rod 24 (the fastening nut 39 is positioned at the right side of the screw hole on the cable 22).
The right end of the screw 14 may be provided with a first rotary socket (e.g., a cross-shaped groove, a straight groove; or a polygonal projection) 19 (i.e., the screw 14 may be rotated by a tool). A conductive spring can be fixed at the left end in the jack 11, and the left end of the conductive inserting rod 24 is contacted with the conductive spring, so that the contact between the conductive inserting rod 24 and the binding post 10 can be enhanced.
When the insulating outer cylinder 12 moves towards the terminal 10, the left part of the conductive insertion rod 24 can be inserted into the insertion hole 11 (to realize electrical connection), and then the insulating fixing sleeve 23 is screwed on the terminal 10, namely the insulating outer cylinder 12 is fixedly connected with the terminal 10. When the insulation outer cylinder 12 needs to be disconnected, the insulation fixing sleeve 23 is rotated reversely, the insulation fixing sleeve 23 leaves the terminal 10, the conductive inserted rod 24 is pulled out of the inserting hole 11, and the insulation outer cylinder 12 is separated from the terminal 10.
The cable switching device can also adopt a third structure form:
as shown in fig. 7-8, the cable adapter (or core-chuck cable adapter) includes a first core chuck 46, a main insulating cylinder 44; a main insulation cylinder through hole 45 is formed in the main insulation cylinder 44, a first inner core chuck 46 is installed in the main insulation cylinder through hole 45, a rotation through hole is formed in the main insulation cylinder 44 and communicated with the main insulation cylinder through hole 45, and a second rotation socket 31 of the first inner core chuck 46 is located at the rotation through hole (a rotation tool is inserted into the rotation through hole and can rotate a screw rod of the first inner core chuck 46);
the first core chuck 46 comprises an annular disc 28, a slide block 29 and a conductive arc-shaped clamping piece 30; a cable connecting through hole 41 is arranged in the middle of the annular disc 28, the annular disc 28 is provided with 3-4 sliding grooves along the radial direction, the 3-4 sliding grooves are uniformly distributed (when the 4 sliding grooves form a 90-degree included angle with each other), a sliding block 29 matched with the sliding grooves is arranged in the sliding grooves (the sliding block 29 can move inwards and outwards along the sliding grooves, the cable 22 is clamped by the conductive arc-shaped clamping piece 30), the conductive arc-shaped clamping piece 30 is fixed at the inner end of the sliding block 29 (the conductive arc-shaped clamping piece 30 is made of a conductive material), a long screw hole (a screw hole with a certain distance or a through hole) is arranged in the outer end of the sliding block 29, the inner end of the screw rod is screwed into the long screw hole, and the outer end of the screw rod is; the outer end of the screw is provided with a second rotary socket (e.g. a cross-shaped groove, a straight-line-shaped groove; or a polygonal projection) 31 (i.e. the screw can be rotated by a tool).
The screws connected with 3-4 sliding blocks 29 can be connected by a rotary transmission device, and only one second rotary socket is needed to realize the simultaneous rotation of a plurality of screws.
The cable 50 of the ring main unit comprises an input cable and an output cable of the ring main unit.
When the cable is used, the conducting terminal of the cable (cable of the ground ring main unit, such as the cable of the first ring main unit 1 or the third ring main unit 3) 50 of the ring main unit to be connected or the cable of the transformer is inserted into the cable connecting through hole 41 from one end of the main insulating cylinder through hole 45 of the main insulating cylinder 44, and the conducting terminal of the cable 22 is inserted into the cable connecting through hole 41 from the other end of the main insulating cylinder through hole 45 of the main insulating cylinder 44; the screw is rotated, the sliding block 29 moves inwards, and 3-4 conductive arc-shaped clamping pieces 30 clamp 2 cables to realize electric connection. When the cable needs to be disconnected, the screw rod is rotated reversely, the slide block 29 moves outwards, and 2 cables are drawn out from the cable connecting through hole 41.
The cable switching device (inner core chuck cable switching device) also comprises an auxiliary insulating cylinder 48, an auxiliary insulating cylinder through hole 49 is arranged in the auxiliary insulating cylinder 48, and the insulating cylinder through hole 49 is communicated with the main insulating cylinder through hole 45 through a cable through hole on the main insulating cylinder 44; a second inner core chuck 47 is installed in the auxiliary insulating cylinder 48, a rotary through hole is formed in the auxiliary insulating cylinder 48 and communicated with the auxiliary insulating cylinder through hole 49, and a second rotary socket 31 of the second inner core chuck 47 is positioned at the rotary through hole (a rotary tool is inserted into the rotary through hole and can rotate a screw of the second inner core chuck 47).
The second core chuck 47 has the same structure as the first core chuck 46.
When in use, the main insulating cylinder is used as above. The conductive end of the second cable 22 is inserted into the through hole 49 of the auxiliary insulating cylinder, passes through the cable connecting through hole 41 of the second inner core chuck 47, enters the through hole 45 of the main insulating cylinder, and then is connected with the first cable 22 (the conductive end of the second cable 22 can be pulled out from the through hole 45 of the main insulating cylinder, knotted and looped on the first cable 22, then sent into the through hole 45 of the main insulating cylinder, the second cable 22 is drawn back, tensioned, and then the second inner core chuck 47 is fastened); the screw is rotated, the sliding block 29 moves inwards, and 3-4 conductive arc-shaped clamping pieces 30 clamp the second cable 22 to realize the connection of a plurality of cables. When disconnection is required, the screw is rotated in the reverse direction, and the slider 29 is moved outward to draw out the second cable 22 from the cable connecting through-hole 41.
The cable switching device can also adopt four other structural forms:
this is the case: when the ring main unit connected to the overhead line cable 37 on the distribution network line needs to be replaced or repaired, the input cable of the on-vehicle ring main unit is connected to the overhead line cable 37 (not connected to the ring main unit). The electric connection on the overhead line cable 37 can be connected into the ground ring main unit, and the electric connection on the ground ring main unit can be also sent to the overhead line cable 37.
The same as example 1 except that:
the cable switching device (adopting an overhead line cable to be connected into the vehicle-mounted ring main unit) connected with the input cable of the vehicle-mounted ring main unit. As shown in fig. 9, the cable switching device (a device that adopts an overhead line cable to access the vehicle-mounted ring main unit) includes an insulating support frame 32, a jacking device 33, a vertical rod 35, an upper clamping rod 36, and a lower clamping rod 38; the vertical rod 35, the upper clamping rod 36 and the lower clamping rod 38 are all electric conductors (made of electric conducting materials); the left end of the upper clamping rod 36 is fixedly connected with the upper end of the vertical rod 35, a vertical sliding groove (or a vertical sliding rail) 34 is arranged on the right side surface of the vertical rod 35, the left end of the lower clamping rod 38 is positioned in the vertical sliding groove (the lower clamping rod 38 can slide up and down along the vertical sliding groove; when the vertical sliding rail is adopted, the left end of the lower clamping rod 38 is clamped on the vertical sliding rail and can slide), and the lower clamping rod 38 is connected with the insulating support frame 32 through a jacking device (such as a hydraulic cylinder and a pneumatic cylinder) 33; the upper end of the cable 22 is fixedly connected to the vertical rod 35.
The bottom surface of the upper clamping rod 36 is provided with an inner arc-shaped groove, and the upper surface of the lower clamping rod 38 is provided with an inner arc-shaped groove (used for clamping an overhead line cable 37).
The jacking device is a hydraulic cylinder or a pneumatic cylinder, or a motor, a screw rod and a nut; when the hydraulic cylinder is adopted, a piston rod of the hydraulic cylinder is connected with (can be hinged with) the lower clamping rod 38, and a cylinder body of the hydraulic cylinder is fixedly connected with the insulating support frame 32; when the pneumatic cylinder is adopted, a piston rod of the pneumatic cylinder is connected (can be hinged) with the lower clamping rod 38, and a cylinder body of the pneumatic cylinder is fixedly connected with the insulating support frame 32; when the motor, the screw rod and the nut are adopted, the motor is fixed on the insulating support frame 32, an output shaft of the motor is connected with the screw rod, the nut is screwed on the screw rod, and the nut is fixedly connected with the lower clamping rod 38.
Use of: the upper clamping rod 36 and the lower clamping rod 38 are lifted to the overhead line cable 37 by the insulating support frame 32, the upper clamping rod 36 is hung on the overhead line cable 37, and the lower clamping rod 38 is lifted by the lifting device, so that the overhead line cable 37 is clamped (electrically connected) by the lower clamping rod 38 and the upper clamping rod 36. When disconnection is required, the jacking device is lowered to lower the lower clamping bar 38, the insulating support frame 32 is operated, and the upper clamping bar 36 and the lower clamping bar 38 are separated from the overhead line cable 37.
The invention has the characteristics that:
1. the automobile, the vehicle-mounted ring main unit and the cable switching device are adopted; the automobile can arrive the scene fast, and the cable (input cable, transformer cable, output cable) of on-vehicle looped netowrk cabinet prepares in advance, and length can not be restricted (can be very long).
The novel bypass cable operation method is applied to maintenance or replacement projects of equipment such as a ring main unit of a distribution network line, the operation radius can be effectively reduced, the operation cost and the labor intensity are reduced, the distribution network emergency guarantee operation technology is good in practicability, high-efficient and simple, installation and operation are simplified, the operation time is shortened, and the distribution network emergency guarantee operation technology is worth being popularized in a distribution system. When the hot-line work technology is applied to distribution network cable network lines and is obstructed, the novel bypass cable work method is a good attempt and a future technology development direction.
And the ring main unit is utilized to carry out bypass operation at vacant intervals, and the bypass operation of the loop closing operation is completed by checking the phase sequence, so that the user does not have power failure.
2. The novel bypass cable operation method indicates a development direction, and can be continuously researched in the direction of cable switching and equipment reserved bypass cable connection interfaces in future, so that technical personnel in China can be expected to continuously improve and innovate on the basis, and the distribution power network in China is safer.
3. The cable switching device developed by the project is designed into L shapes (a hand-held type, a cable guide tube becomes a handle, and innovative technology), one end of the cable switching device can be in butt joint with a quick plug-in type terminal of the bypass cable to finish uninterrupted operation, and the hand-held type point switching mode is applied.
4. After the application, the economic and social benefits of the power enterprise are obvious; the maintenance, the fire-receiving, the preventive test, the fault isolation and the like can be applied, the power supply reliability is greatly improved, and the high-quality service effect is obvious.
Claims (2)
1. Spiral cable switching device, its characterized in that: the cable guide tube comprises a binding post (10), an insulating outer cylinder (12), a screw (14), a cable guide tube (20), an insulating fixing sleeve (23), a conductive inserted rod (24) and a fastening nut (39); the wiring terminal (10) is a conductor, the wiring terminal (10) is connected with a power supply contact of a ring main unit or a transformer to be connected, a jack (11) is arranged in the right end of the wiring terminal (10), a locking block (40) is arranged at the right end of the wiring terminal (10), and the outer diameter of the wiring terminal (10) is 0-4mm smaller than the inner diameter of a cylinder hole (13) of the insulating outer cylinder; a cylinder hole (13) is formed in the insulating outer cylinder (12), the right end part of the insulating outer cylinder (12) is a closed end part, a screw hole (17) is formed in the closed end part, and the screw hole (17) is communicated with the cylinder hole (13); the inner wall of the insulating outer cylinder (12) in the cylinder hole (13) is provided with straight sliding grooves (26) and arc-shaped sliding grooves (27), the straight sliding grooves (26) are arranged along the left-right direction, the number of the arc-shaped sliding grooves (27) corresponds to the number of the locking blocks (40), and the distance between the adjacent straight sliding grooves (26) and the straight sliding grooves (26) corresponds to the distance between the adjacent locking blocks (40) and the locking blocks (40); the arc-shaped sliding chute (27) is arc-shaped, and the arc-shaped sliding chute (27) is communicated with the straight sliding chute (26); the conductive inserted bar (24) is positioned in the cylinder hole (13), a screw hole is formed in the right end of the conductive inserted bar (24), and the diameter of the conductive inserted bar (24) is 0-2mm smaller than that of the jack (11); a cable guide pipe (20) is fixed at the right part of the insulating outer cylinder (12), a cable hole is formed in the right part of the insulating outer cylinder (12), the cable hole is communicated with a pipe hole (21) of the cable guide pipe (20), a screw rod hole is formed in one end part of a cable (22), and one end part of the cable (22) penetrates through the pipe hole (21) and the cable hole and then is positioned in the cylinder hole (13); the left part of the screw (14) penetrates through the screw hole (17) and then is positioned in the barrel hole (13), the fastening nut (39) is screwed on the screw (14), the fastening nut (39) is positioned in the barrel hole (13), the left end part of the screw (14) penetrates through the screw hole in the cable (22) and then is screwed into the screw hole of the conductive inserted rod (24), and the cable (22) is fixed on the conductive inserted rod (24) through the fastening nut (39).
2. A helical cable transition device as claimed in claim 1, wherein: and a conductive spring is fixed at the left end in the jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133873.5A CN111403974B (en) | 2020-03-02 | 2020-03-02 | Spiral cable switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133873.5A CN111403974B (en) | 2020-03-02 | 2020-03-02 | Spiral cable switching device |
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| CN111403974A true CN111403974A (en) | 2020-07-10 |
| CN111403974B CN111403974B (en) | 2021-07-27 |
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| CN110277682A (en) * | 2019-05-31 | 2019-09-24 | 武汉船用机械有限责任公司 | Cable connecting terminal |
| CN110739657A (en) * | 2018-07-20 | 2020-01-31 | 施耐德电器工业公司 | Cable head for ring main unit and ring main unit |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2349710Y (en) * | 1998-12-31 | 1999-11-17 | 厦门Abb低压电器设备有限公司 | Column shape conveter for bus |
| CN201430410Y (en) * | 2009-06-25 | 2010-03-24 | 泉州七星电气有限公司 | Cable terminal connector with earth rod |
| CN102437494A (en) * | 2011-12-29 | 2012-05-02 | 厦门立明光电有限公司 | Power interface and LED (Light Emitting Diode) lamp using same |
| DE202015005328U1 (en) * | 2015-06-09 | 2015-09-01 | Hans Kretzschmar | Universal Power Cable Adapter Adapter System |
| CN206148773U (en) * | 2016-11-21 | 2017-05-03 | 国网湖北省电力公司宜昌供电公司 | Enclosed bus adapter |
| CN110739657A (en) * | 2018-07-20 | 2020-01-31 | 施耐德电器工业公司 | Cable head for ring main unit and ring main unit |
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| Publication number | Publication date |
|---|---|
| CN111403974B (en) | 2021-07-27 |
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