CN111342282A - Built-in bolted cable adapter - Google Patents

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. The cable switching device with the built-in bolt is characterized by comprising a wiring terminal, an insulating outer cylinder, a screw rod, a cable guide pipe, an insulating fixing sleeve, a conductive insertion rod and a fastening nut; a jack is arranged in the right end of the binding post, and an external thread is arranged on the right part of the binding post; the left part of the insulating outer cylinder is sleeved with an insulating fixing sleeve; the left part of the conductive inserted bar is positioned outside the insulating outer cylinder, the right part of the conductive inserted bar is positioned in the cylinder hole, the right end of the conductive inserted bar is provided with a screw hole, and the diameter of the conductive inserted bar is 0-1mm smaller than that of the jack; 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, the left end part of the screw rod is screwed into the screw hole of the conductive inserted bar after penetrating through the screw rod hole on the cable, and the fastening nut fixes the cable on the conductive inserted bar. The device has the characteristics of simple structure and convenient use.

Description

Built-in bolted cable adapter

technical field

The invention belongs to the technical field of electric power systems, and in particular relates to a cable transfer device used in a novel bypass cable operation method applied to a ring network cabinet of a distribution network.

Background technique

In the early days, the bypass cable operation technology was mostly used in the simple jumper bypass operation method to isolate the ring main unit to be repaired. Power is supplied to users through a temporary grid established by bypass equipment. However, in the actual situation of the distribution line, the distance between the two ring network cabinets of the distribution network is often hundreds of meters, or even more than a thousand meters. The laying distance of the cable line needs to be more than 500 meters. The long laying distance of the bypass cable line will bring several problems: (1) Safety issues. At present, the bypass cable line is generally laid on the open surface. In order to prevent pedestrians and vehicles from being damaged, special personnel are required to be on duty. If it is too long, there are not enough personnel on duty, and the potential safety hazards will increase significantly. (2) Efficiency problem, the maintenance work of the distribution network line directly facing the user generally requires short time and high efficiency. According to the bypass cable operation experience, it takes more than 3 hours to lay the bypass cable with a distance of 300 meters. This is obviously contrary to the original intention of carrying out the bypass cable operation. (3) The cost problem is well known. The basic configuration and purchase cost of a set of bypass cable operation equipment with an operating distance of 300 meters is about 2 million. Once the operating distance is doubled, the equipment purchase cost will also increase accordingly, which is unbearable for ordinary power supply enterprises. In addition, long-distance cable laying must increase the number of workers, and the labor cost will also increase.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a cable transfer device with built-in bolts, which has the characteristics of simple structure and convenient use.

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is: a built-in bolt cable transfer device is characterized in that it includes a terminal, an insulating outer cylinder, a screw rod, a cable guide tube, an insulating fixing sleeve, a conductive insert rod, and a tightening nut; The column is a conductor, the terminal is connected to the power supply contact of the ring main unit or transformer to be connected, the right end of the terminal is provided with a jack, the right part of the terminal is provided with an external thread; the insulating outer cylinder is provided with a cylinder hole, The right end of the insulating outer cylinder is a closed end, and the closed end is provided with a screw hole, and the screw hole is connected with the cylinder hole; the left end of the insulating outer cylinder is provided with an outer retaining ring, and the left part of the insulating outer cylinder is sleeved with an insulating fixing sleeve. The right end of the insulating fixing sleeve is provided with an inner baffle ring, the inner diameter of the inner baffle ring is smaller than the outer diameter of the outer baffle ring, and the insulating fixing sleeve is provided with an inner thread matching the outer thread on the terminal; the left part of the conductive insert rod Located outside the insulating outer cylinder, the right part of the conductive insert rod is located in the cylinder hole, the right end of the conductive insert rod is provided with a screw hole, and the diameter of the conductive insert rod is 0-1mm smaller than the diameter of the jack; the right part of the insulating outer cylinder is fixed with a cable Guide tube, the right part of the insulating outer cylinder is provided with a cable hole, the cable hole is connected with the pipe hole of the cable guide pipe, one end of the cable is provided with a screw hole, and one end of the cable passes through the pipe hole and the cable hole is located in the cylinder hole inside; the left part of the screw rod is located in the cylinder hole after passing through the screw hole, the tightening nut is screwed on the screw rod, the tightening nut is located in the cylinder hole, the left end of the screw rod passes through the screw hole on the cable and then screwed into the conductive insert rod In the threaded hole of the cable, tighten the nut to fix the cable on the conductive plug.

A conductive spring is fixed at the left end of the socket.

The beneficial effects of the invention are that the device has the characteristics of simple structure and convenient use.

Description of drawings

FIG. 1 is a schematic diagram of the connection of the existing distribution network line ring network cabinet.

FIG. 2 is a schematic diagram of the application of the present invention.

FIG. 3 is a schematic structural diagram of one of other cable transfer devices.

FIG. 4 is a schematic structural diagram of the present invention.

FIG. 5 is a schematic diagram of the structure of another cable transfer device.

FIG. 6 is a schematic structural diagram of the double wiring base of the ring network cabinet cable according to the present invention.

FIG. 7 is a schematic structural diagram of the third cable switching device.

FIG. 8 is a schematic diagram of the structure of the inner core chuck.

FIG. 9 is a schematic diagram of the structure of another cable transfer device No. 4. FIG.

In the figure: 1- the first ring network cabinet, 2- the second ring network cabinet, 3- the third ring network cabinet, 4- transformer, 5- vehicle ring network cabinet, 6- the input cable of the vehicle ring network cabinet, 7- Automobile, 8-Transformer cable of vehicle ring network cabinet, 9-output cable of vehicle ring network cabinet, 10-terminal, 11-jack, 12-insulation outer cylinder, 13-cylinder hole, 14-screw, 15-cone Body, 16-threaded through hole, 17-screw hole, 18-bearing, 19-first rotating socket, 20-cable guide tube, 21-pipe hole, 22-cable, 23-insulation fixing sleeve, 24-conductive insertion rod , 25-outer retaining ring, 26-straight chute, 27-arc chute, 28-ring disc, 29-slider, 30-conductive arc-shaped clip, 31-second rotating socket, 32-insulation support frame , 33-jacking device, 34-vertical chute, 35-vertical rod, 36-upper clamp rod, 37-overhead line cable, 38-lower clamp rod, 39-fastening nut, 40-lock block, 41 - Cable connection through hole, 42-Ring main unit cabinet, 43-Cable access jack, 43-1-A phase first jack, 43-2-A phase second jack, 43-3-B phase The 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- the first inner core chuck, 47- the second inner core chuck, 48- with insulating cylinder, 49- with insulating cylinder through hole, 50- cable of ring network cabinet.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 4, the built-in bolt cable transfer device (or cable transfer device) includes a terminal 10, an insulating outer cylinder (insulating jacket) 12, a screw 14, a cable guide tube 20, an insulating fixing sleeve 23, a conductive plug The rod 24, the tightening nut 39; the terminal 10 is a conductor (the material of the terminal 10 is a conductive material), and the terminal 10 is connected to the power supply contact of the ring main unit or transformer to be connected {the connection method can be one of the following: 1. As shown in Figure 6, the wiring base of the ring network cabinet is changed to the double wiring base of the cable of the ring network cabinet, that is, there are 6 cable access jacks 43 on the double wiring base of the ring network cabinet cable, which are A-phase respectively. First socket 43-1, A-phase second socket 43-2, B-phase first socket 43-3, B-phase second socket 43-4, C-phase first socket 43-5, C-phase The second jack 43-6, the terminals of the A-phase, B-phase, and C-phase live wires are respectively connected to two cable access jacks, and the terminal 10 is inserted into the empty cable access jacks to realize online connection (ie 2. It can also be used: there is a power cable connection point on the terminal 10 (conventional method, usually a power cable insertion hole is used to insert the power cable to be connected, and then screw the screw from the screw to compress the power cable. , fastened by a screw); the terminal 10 can be fixed on the wiring base of the ring network cabinet}, the right end of the terminal 10 is provided with a jack 11 (the right side of FIG. 4 is the right), and the right part of the terminal 10 is provided with External thread, the outer diameter of the terminal 10 corresponds to the outer diameter of the insulating outer cylinder; the insulating outer cylinder 12 is provided with a cylinder hole 13, the right end of the insulating outer cylinder 12 is a closed end, and the closed end is provided with a screw hole 17 , the screw hole 17 is communicated with the cylinder hole 13 (or, the right end of the insulating outer cylinder 12 is fixed with a closing plate, and the closing plate is provided with a screw hole); the left end of the insulating outer cylinder 12 is provided with an outer retaining ring 25, The left part is covered with an insulating fixing sleeve 23, and the right end of the insulating fixing sleeve 23 is provided with an inner retaining ring, the inner diameter of the inner retaining ring is smaller than the outer diameter of the outer retaining ring 25 (that is, the outer retaining ring 25 can prevent the insulating retaining sleeve 23 from The left end of the barrel 12 leaves), and the insulating fixing sleeve 23 is provided with an inner thread matching the outer thread on the terminal 10; Inserted into the jack 11), the right part of the conductive rod 24 is located in the cylinder hole 13, the right end of the conductive rod 24 is provided with a screw hole, and the diameter of the conductive rod 24 is smaller than the diameter of the socket 11 by 0-1mm (that is, the conductive plug The left part of the rod 24 can be inserted into the jack 11); the right part of the insulating outer cylinder 12 is fixed with a cable guide tube 20, the right part of the insulating outer cylinder 12 is provided with a cable hole, and the cable hole and the pipe hole 21 of the cable guide tube 20 Connected, one end of the cable 22 is provided with a screw hole (or, one end of the cable 22 is connected to a conductive ring piece), and one end of the cable 22 passes through the pipe hole 21 and the cable hole and is located in the cylinder hole 13;

The left part of the screw rod 14 passes through the screw hole 17 and is located in the cylinder hole 13, the tightening nut 39 is screwed on the screw rod 14, the tightening nut 39 is located in the cylinder hole 13, and the left end of the screw rod 14 passes through the screw hole on the cable 22 Then screw it into the screw hole of the conductive insert rod 24, and fasten the nut 39 to fix the cable 22 on the conductive insert rod 24 (the tightening nut 39 is located on the right side of the screw hole on the cable 22).

The right end of the screw rod 14 can be provided with a first rotating socket (eg, a cross-shaped groove, a straight-line groove; or a polygonal projection) 19 (that is, a tool can be used to rotate the screw rod 14). A conductive spring can be fixed on the left end of the socket 11 , and the left end of the conductive insertion rod 24 is in contact with the conductive spring, which can strengthen the contact between the conductive insertion rod 24 and the terminal 10 .

When in use, the insulating outer cylinder 12 moves toward the terminal 10, and the left part of the conductive insertion rod 24 can be inserted into the jack 11 (to achieve electrical connection), and then the insulating fixing sleeve 23 is screwed on the terminal 10, about the insulating outer cylinder 12. It is fixedly connected with the terminal 10 . When it needs to be disconnected, the insulating fixing sleeve 23 is reversely rotated, the insulating fixing sleeve 23 is separated from the terminal 10 , and the conductive insertion rod 24 is pulled out from the socket 11 to realize the separation of the insulating outer cylinder 12 and the terminal 10 .

As shown in Figure 1, Figure 2, Figure 4, the application of the built-in bolt cable transfer device (or cable transfer device) (or: a new bypass cable operation method applied to the ring network cabinet of the distribution network) , including the following steps:

1) prepare a miniature power supply power network system, the miniature power supply power network system includes a car 7, a vehicle-mounted ring network cabinet 5, and a cable switching device; the vehicle-mounted ring network cabinet 5 is installed on the vehicle 7;

2) When a certain ring network cabinet (such as the second ring network cabinet 2) on the distribution line needs to be replaced or repaired, the car 7 arrives at the ring network cabinet (such as the second ring network cabinet 2) with the vehicle-mounted ring network cabinet 5. ) place, disconnect the input cable, the output cable of this ring main unit, and disconnect the transformer cable that this ring main unit is connected with the transformer 4; The input cable 6 of the vehicle ring main unit is connected to the ring main unit by the cable transfer device The output end of an adjacent ring main unit (for example, the first ring main unit 1) is connected, and the transformer cable 8 of the vehicle ring main unit is connected to the transformer 4 connected to the ring main unit by the cable transfer device, and the vehicle ring main unit is connected. The output cable 9 is connected with the input end of the next ring network cabinet (for example, the third ring network cabinet 3) adjacent to the ring network cabinet by the cable switching device;

3) After replacing or repairing the ring network cabinet (for example, the second ring network cabinet 2), disconnect the input cable 6 of the vehicle ring network cabinet, the transformer cable 8 of the vehicle ring network cabinet, and the output cable 9 of the vehicle ring network cabinet;

Connect the input cable of the replaced or repaired ring network cabinet to the output end of the adjacent previous ring network cabinet (for example, the first ring network cabinet 1), and connect the output cable of the replaced or repaired ring network cabinet to the adjacent ring network cabinet. The input end of a ring main unit (for example, the third ring main unit 3 ) behind is connected, and the transformer cable of the replaced or repaired ring main unit is connected to the transformer 4 .

The cable transfer device can also adopt one of the other structural forms:

As shown in FIG. 3, the cable transfer device (or the inner ring expansion cable transfer device) includes a terminal 10, an insulating outer cylinder (or an insulating jacket) 12, a screw 14, a cone 15, a bearing 18, a cable guide Pipe 20; the terminal 10 is a conductor (the material of the terminal 10 is a conductive material), and the terminal 10 is connected to the power supply contact of the ring main unit or transformer to be connected {the connection method can be one of the following: 1. Figure 6 As shown, the wiring base of the ring network cabinet is changed to the double wiring base of the cable of the ring network cabinet, that is: the double wiring base of the cable of the ring network cabinet is respectively provided with 6 cable access jacks 43, which are the first jacks 43 of the A phase. -1, A-phase second jack 43-2, B-phase first jack 43-3, B-phase second jack 43-4, C-phase first jack 43-5, C-phase second jack 43 -6, The terminals of the A-phase, B-phase, and C-phase live wires are respectively connected to 2 cable access jacks, and the terminal 10 is inserted into the empty cable access jacks to realize online connection (ie, no power failure); 2 , can also be used: the terminal 10 is provided with a power cable connection point (conventional method, usually a power cable insertion hole is used, insert the power cable to be connected, and then screw the screw into the screw to compress the power cable, and the screw is fastened. ); the terminal 10 can be fixed on the wiring base of the ring network cabinet}, the right end of the terminal 10 is provided with a jack 11 (the right side of FIG. 3 is the right); the insulating outer cylinder 12 is provided with a cylinder hole 13, the cylinder hole The diameter of 13 is larger than the diameter of the terminal 10 by 0-4 mm (that is, the right part of the terminal 10 can be inserted into the cylinder hole 13), the right end of the insulating outer cylinder 12 is a closed end, and the closed end is provided with a screw hole 17. The hole 17 is communicated with the cylinder hole 13 (or, the right end of the insulating outer cylinder 12 is fixed with a closing plate, and the closing plate is provided with a screw hole); the cone 15 is located in the cylinder hole 13, the small end of the cone 15 is located on the left, and the cone The outer diameter of the small end of the body 15 is smaller than the inner diameter of the socket 11, and the outer diameter of the large end of the cone 15 is larger than the inner diameter of the socket 11; the cone 15 is provided with a threaded through hole 16 matching the screw; On the left end of the screw 14, the right end of the screw 14 is located outside the insulating outer cylinder 12 through the screw hole 17, and the right end of the screw 14 is provided with a first rotating socket (such as a cross-shaped groove, a straight-shaped groove; Bump) 19 (you can use a tool to rotate the screw 14), a bearing 18 is installed on the right part of the screw 14, and the bearing 18 is fixed in the screw hole 17 (the screw 14 can be rotated, and the cone 15 can move left and right); The right part is fixed with the cable guide tube 20, the right part of the insulating outer cylinder 12 is provided with a cable hole, the cable hole is communicated with the tube hole 21 of the cable guide tube 20, one end of the cable 22 passes through the tube hole 21, and the cable hole is connected to the cone. The body 15 is fixedly connected, and the cone 15 is a conductor (the material of the cone 15 is a conductive material).

When in use, the insulating outer cylinder 12 moves toward the terminal 10, the terminal 10 is inserted into the cylinder hole 13, and the cone 15 is inserted into the socket 11 at the same time, and the screw 14 is rotated with a tool (sleeved or inserted into the first rotating socket 19). The body 15 moves to the left, so that the cone 15 is tightly connected with the terminal 10, that is, the electrical connection is realized. When it needs to be disconnected, use the tool to rotate the screw 14 in the opposite direction, the cone 15 moves to the right, the cone 15 leaves the terminal 10, and the insulating outer cylinder 12 moves to the right, and the insulating outer cylinder 12 leaves the terminal 10.

In FIGS. 3-5 , the cable 22 includes one of the input cable 6 of the vehicle-mounted ring network cabinet, the transformer cable 8 of the vehicle-mounted ring network cabinet, and the output cable 9 of the vehicle-mounted ring network cabinet. The cables (input cable, transformer cable, output cable) of the vehicle ring main unit are flexible cables.

The cable transfer device can also adopt the second structural form:

As shown in FIG. 5, the cable transfer device includes a terminal 10, an insulating outer cylinder (insulation jacket) 12, a screw 14, a cable guide tube 20, an insulating fixing sleeve 23, a conductive insertion rod 24, and a tightening nut 39; wiring; The post 10 is a conductor (the material of the terminal 10 is a conductive material), and the terminal 10 is connected to the power supply contact of the ring main unit or transformer to be connected {the connection method can be one of the following: 1. As shown in Figure 6, the ring The wiring base of the network cabinet is changed to the double wiring base of the cable of the ring network cabinet, that is, there are 6 cable access jacks 43 on the double wiring base of the cable of the ring network cabinet, which are the first jacks 43-1 of the A phase, A Phase second jack 43-2, B-phase first jack 43-3, B-phase second jack 43-4, C-phase first jack 43-5, C-phase second jack 43-6, A The terminals of the phase, B-phase, and C-phase live wires are respectively connected to two cable access jacks, and the terminal 10 is inserted into the empty cable access jacks to realize online connection (ie, no power failure); 2. It can also be used : There is a power cable connection point on the terminal 10 (the conventional method is usually used to set a power cable insertion hole, insert the power cable to be connected, and then screw the screw into the screw to compress the power cable, and the screw is fastened); 10 can be fixed on the wiring base of the ring network cabinet}, the right end of the terminal 10 is provided with a socket 11 (the right side of FIG. 5 is the right), the right end of the terminal 10 is provided with a lock block 40, and the outer The diameter is 0-4mm smaller than the inner diameter of the cylinder hole 13 of the insulating outer cylinder (that is, the right part of the terminal 10 can be inserted into the cylinder hole 13); the insulating outer cylinder 12 is provided with a cylinder hole 13, and the right end of the insulating outer cylinder 12 is closed. The end, the closed end is provided with a screw hole 17, and the screw hole 17 is communicated with the cylinder hole 13 (or, the right end of the insulating outer cylinder 12 is fixed with a closing plate, and the closing plate is provided with a screw hole);

The inner wall of the insulating outer cylinder 12 in the cylinder hole 13 is provided with a straight chute 26 and an arc-shaped chute 27. The straight chute 26 is arranged in the left-right direction, and the number of the arc-shaped chute 27 corresponds to the number of the lock blocks 40. Correspondingly (the number of lock blocks 40 is preferably 2-3), the spacing between the adjacent straight chute 26 and the straight chute 26 corresponds to the spacing between the adjacent lock blocks 40 and the lock blocks 40; the arc chute 27 is Arc-shaped, the arc-shaped chute 27 is connected with the straight chute 26 (the lock block 40 can slide in the straight chute 26 and the arc-shaped chute 27, that is, the size of the lock block 40 is smaller than that of the straight chute 26 and the arc-shaped chute 27 size);

The conductive insertion rod 24 is located in the cylinder hole 13, the right end of the conductive insertion rod 24 is provided with a screw hole, and the diameter of the conductive insertion rod 24 is smaller than the diameter of the jack 11 by 0-2 mm (that is, the left part of the conductive insertion rod 24 can be inserted into the insertion hole 11). The right part of the insulating outer cylinder 12 is fixed with a cable guide tube 20, the right part of the insulating outer cylinder 12 is provided with a cable hole, the cable hole is communicated with the pipe hole 21 of the cable guide tube 20, and one end of the cable 22 is provided with The screw hole (or, one end of the cable 22 is connected to a conductive ring piece), and one end of the cable 22 passes through the tube hole 21 and the cable hole and is located in the cylinder hole 13;

The left part of the screw rod 14 passes through the screw hole 17 and is located in the cylinder hole 13, the tightening nut 39 is screwed on the screw rod 14, the tightening nut 39 is located in the cylinder hole 13, and the left end of the screw rod 14 passes through the screw hole on the cable 22 Then screw it into the screw hole of the conductive insert rod 24, and fasten the nut 39 to fix the cable 22 on the conductive insert rod 24 (the tightening nut 39 is located on the right side of the screw hole on the cable 22).

The right end of the screw rod 14 can be provided with a first rotating socket (eg, a cross-shaped groove, a straight-line groove; or a polygonal projection) 19 (that is, a tool can be used to rotate the screw rod 14). A conductive spring can be fixed on the left end of the socket 11 , and the left end of the conductive insertion rod 24 is in contact with the conductive spring to strengthen the contact (electrical connection) between the conductive insertion rod 24 and the terminal 10 .

When in use, the insulating outer cylinder 12 moves toward the terminal 10, the terminal 10 is inserted into the cylinder hole 13, the lock block 40 is inserted into the straight chute 26, and the left part of the conductive insertion rod 24 is inserted into the jack 11 (to achieve electrical connection) ; Rotate the insulating outer cylinder 12, the lock block 40 enters the arc-shaped chute 27 to connect the insulating outer cylinder 12 with the terminal 10. When it needs to be disconnected, reversely rotate the insulating outer cylinder 12, the lock block 40 is withdrawn from the arc-shaped chute 27, and the insulating outer cylinder 12 is pulled to the right. 11 to separate the insulating outer cylinder 12 from the terminal 10 .

The cable transfer device can also adopt other structural forms:

As shown in Figures 7-8, the cable transfer device (or the inner core chuck cable transfer device) includes a first inner core chuck 46 and a main insulating cylinder 44; the main insulating cylinder 44 is provided with a main insulating cylinder Through hole 45, a first inner core chuck 46 is installed in the through hole 45 of the main insulating cylinder, a rotating through hole is opened on the main insulating cylinder 44, and the rotating through hole is communicated with the through hole 45 of the main insulating cylinder, and the first inner core clamp The second rotating socket 31 of the disk 46 is located at the rotating through hole (a rotating tool is inserted into the rotating through hole, and the screw rod of the first inner core chuck 46 can be rotated);

The first inner core chuck 46 includes an annular disk 28, a sliding block 29, and a conductive arc clip 30; the middle of the annular disk 28 is provided with a cable connection through hole 41, and the annular disk 28 is radially provided with 3-4 sliding grooves , 3-4 chutes are evenly distributed (4 chutes form a 90-degree angle with each other), and there is a sliding block 29 in the sliding groove (the sliding block 29 can move along the inside and outside of the sliding groove) , move inward, the conductive arc-shaped clip 30 clamps the cable 22), the inner end of the slider 29 is fixed with a conductive arc-shaped clip 30 (the material of the conductive arc-shaped clip 30 is a conductive material), the outer part of the slider 29 is fixed There is a long screw hole (a screw hole with a certain distance, or a through hole) in the end, the inner end of the screw is screwed into the long screw hole, and the outer end of the screw is connected with the annular disc 28 by a bearing (that is, the screw It can be rotated to realize the movement of the slider 29 along the inside and outside of the chute); the outer end of the screw is provided with a second rotating socket (such as a cross-shaped groove, a straight-shaped groove; or a polygonal bump) 31 (that is, a tool can be used to rotate the screw ).

The screws connected with 3-4 sliders 29 can also be connected by a rotary transmission device, and only one second rotation socket is needed to realize the simultaneous rotation of multiple screws.

The cables 50 of the ring main unit include input cables and output cables of the ring main unit.

When in use, remove the conductive end of the cable of the ring main unit to be connected (the 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) or the conductive end of the transformer cable from the main insulating cylinder. One end of the main insulating cylinder through hole 45 of 44 is inserted into the cable connecting through hole 41, and the conductive end 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 slider 29 moves inward, and 3-4 conductive arc clips 30 clamp the two cables to realize electrical connection. When it needs to be disconnected, the screw is reversely rotated, the slider 29 moves outward, and two cables are pulled out from the cable connecting through hole 41 .

The cable transfer device (inner-core chuck cable transfer device) also includes an insulating barrel 48 , and the insulating barrel 48 is provided with an insulating barrel through hole 49 , and the insulating barrel through hole 49 is connected by the cable on the main insulating barrel 44 . The through hole is communicated with the through hole 45 of the main insulating cylinder; the second inner core chuck 47 is installed in the attached insulating cylinder 48, the attached insulating cylinder 48 is provided with a rotating through hole, and the rotating through hole is communicated with the through hole 49 of the attached insulating cylinder , the second rotation socket 31 of the second inner core chuck 47 is located at the rotation through hole (a rotation tool is inserted into the rotation through hole, and the screw of the second inner core chuck 47 can be rotated).

The structure of the second inner core chuck 47 is the same as that of the first inner 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 attached 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 is then connected to 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, tied to the first cable 22 in a loop, and then sent into the through hole 45 of the main insulating cylinder, and the second cable 22 can be pulled back. A cable 22 is tightened, and then the second inner core chuck 47) is tightened; the screw is rotated, the slider 29 moves inward, and 3-4 conductive arc clips 30 clamp the second cable 22 to achieve multiple cable connection. When it needs to be disconnected, the screw is reversely rotated, the slider 29 moves outward, and the second cable 22 is pulled out from the cable connecting through hole 41 .

The cable transfer device can also adopt other structural forms:

This situation is: when the ring network cabinet connected to the overhead line cable 37 on the distribution network line needs to be replaced or repaired, the input cable of the vehicle ring network cabinet is connected to the overhead line cable 37 (not connected to the ring network cabinet). The electricity on the overhead line cable 37 can be connected to the ground ring network cabinet, and the electricity on the ground ring network cabinet can also be fed into the overhead line cable 37 .

Basically the same as Example 1, the difference is:

A cable transfer device connected to the input cable of the vehicle ring network cabinet (a device that uses an overhead line cable to connect to the vehicle ring network cabinet). As shown in FIG. 9 , the cable transfer device (a device that uses overhead line cables to connect to the vehicle-mounted ring network cabinet) 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 conductors (the material thereof is a conductive material); the left end of the upper clamping rod 36 is fixedly connected with the upper end of the vertical rod 35, and the right end of the vertical rod 35 is There is a vertical chute (or vertical slide rail) 34 on the side, and the left end of the lower clamp rod 38 is located in the vertical chute (the lower clamp rod 38 can slide up and down along the vertical chute; the vertical slide rail is used) When the left end of the lower clamp rod 38 is stuck on the vertical slide rail and can slide), the lower clamp rod 38 is connected with the insulating support frame 32 by the jacking device (such as a hydraulic cylinder, a pneumatic cylinder) 33; the upper end of the cable 22 It is fixedly connected with 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 (for clamping the overhead line cable 37 ).

The lifting device is a hydraulic cylinder, a pneumatic cylinder, or a motor, a screw rod and a nut; when a hydraulic cylinder is used, the piston rod of the hydraulic cylinder is connected to the lower clamp rod 38 (can be hinged), and the cylinder body of the hydraulic cylinder is connected to the insulating support frame. 32 is fixedly connected; when a pneumatic cylinder is used, the piston rod of the pneumatic cylinder is connected with the lower clamp rod 38 (can be hinged), and the cylinder body of the pneumatic cylinder is fixedly connected with the insulating support frame 32; when the motor, screw and nut are used, the motor is fixed on the insulating On the support frame 32 , the 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 clamp rod 38 .

Use: Use the insulating support frame 32 to lift the upper clamp rod 36 and the lower clamp rod 38 to the overhead line cable 37, the upper clamp rod 36 is hung on the overhead line cable 37, and the lower clamp rod 38 is lifted by the jacking device. The overhead line cable 37 is clamped (electrically connected) by the lower clamp rod 38 and the upper clamp rod 36 . When it needs to be disconnected, the jacking device is lowered, the lower clamping rod 38 is lowered, the insulating support frame 32 is operated, and the upper clamping rod 36 and the lower clamping rod 38 are separated from the overhead line cable 37 .

Features of the present invention:

1. Due to the use of automobiles, vehicle-mounted ring network cabinets, and cable transfer devices; the car can quickly arrive at the site, and the cables (input cables, transformer cables, and output cables) of the vehicle-mounted ring network cabinet are prepared in advance, and the length can be unlimited (it can be very long) .

The new bypass cable operation method is applied in the maintenance or replacement of equipment such as distribution network ring network cabinets, which can effectively reduce the operating radius, reduce operating costs and labor intensity. It is a practical, efficient and simple distribution network emergency guarantee. The operation technology, the simplified installation operation and the shortened operation time are worthy of promotion in the power distribution system. When the application of live operation technology to the distribution network cable network line encounters obstacles, the new bypass cable operation method is a good attempt and the future direction of technology development.

Use the spare interval of the ring main unit to perform bypass operation, and complete the bypass operation of ring closing operation by checking the phase sequence, so that the user can not power off.

2. The new bypass cable operation method points out a development direction. In the future, we can continue to study in the direction of cable transfer and equipment reserved bypass cable connection interface. Electric power network is more secure.

3. One of the keys to the new bypass cable operation method is the cable switching device, and this product was developed. The cable transfer device developed in this project is designed to be L-shaped (handshake type, the cable guide tube becomes the handle, innovative technology), one end can be docked with the bypass cable quick-plug terminal to complete the non-power-off operation, and the handshake point transfer way to apply.

4. After the application, the economic and social benefits of electric power enterprises are obvious; maintenance, fire connection, preventive test, fault isolation, etc. can be used, the reliability of power supply is greatly improved, and the effect of high-quality service is obvious.

Claims (2)

1. The built-in bolt cable adapter is characterized in that it comprises a terminal (10), an insulating outer cylinder (12), a screw (14), a cable guide tube (20), an insulating fixing sleeve (23), and a conductive insert rod (24). ), tighten the nut (39); the terminal (10) is a conductor, the terminal (10) is connected to the power supply contact of the ring main unit or transformer to be connected, and the right end of the terminal (10) is provided with a jack ( 11), the right part of the terminal (10) is provided with an external thread; the insulating outer cylinder (12) is provided with a cylinder hole (13), the right end of the insulating outer cylinder (12) is a closed end, and the closed end is provided with The screw hole (17) is communicated with the cylinder hole (13); the left end of the insulating outer cylinder (12) is provided with an outer retaining ring (25), and the left part of the insulating outer cylinder (12) is sleeved with an insulating fixing ring Sleeve (23), the right end of the insulating fixing sleeve (23) is provided with an inner retaining ring, the inner diameter of the inner retaining ring is smaller than the outer diameter of the outer retaining ring (25), and the insulating fixing sleeve (23) is provided with a connecting post (10). ); the left part of the conductive rod (24) is located outside the insulating outer cylinder (12), the right part of the conductive rod (24) is located in the cylinder hole (13), the conductive rod (24) The right end of 24) is provided with a screw hole, and the diameter of the conductive insertion rod (24) is smaller than the diameter of the jack (11) by 0-1mm; the right part of the insulating outer cylinder (12) is fixed with a cable guide tube (20), and the insulating outer cylinder The right part of (12) is provided with a cable hole, the cable hole is communicated with the pipe hole (21) of the cable guide tube (20), one end of the cable (22) is provided with a screw hole, and one end of the cable (22) passes through The pipe hole (21) and the cable hole are located in the cylinder hole (13); the left part of the screw rod (14) is located in the cylinder hole (13) after passing through the screw hole (17), and the tightening nut (39) is screwed on the screw rod ( 14), the tightening nut (39) is located in the cylinder hole (13), the left end of the screw (14) passes through the screw hole on the cable (22) and then screwed into the screw hole of the conductive insert rod (24), Fasten the nut (39) to fix the cable (22) on the conductive insert rod (24). 2. The cable adapter with built-in bolts according to claim 1, wherein a conductive spring is fixed at the left end of the insertion hole (11).

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