CN203103759U - A bypass connecting device used between two uninterruptedly-operating ring main units - Google Patents

Abstract

The utility model discloses a bypass connection device for non-stop operation between two ring network cabinets, which comprises two flexible cable connection devices drawn out from the ring network cabinets and a bypass switch arranged between them. Assemblies include cable lugs, flexible cables and plug-in quick connectors. The cable terminal in the utility model is composed of a detachable T-shaped bushing and a cable terminal. The cable with the cable terminal can be introduced from the wire inlet hole of the ring network cabinet first, and then it can be inserted through the T-shaped bushing The lower port of the vertical pipe part is inserted, which greatly facilitates the connection of the cable terminal and the cable sleeve. The utility model utilizes the characteristic that the shielding wire of the flexible cable is fully connected, and leads the grounding point from the cable terminal to the bypass switch, without additionally erecting the grounding wire. The flexible cable connecting device of the utility model has the advantages of simple structure, convenient use, reduced working range, convenient maintenance without power failure, and improved reliability of line power supply.

Description

Bypass connecting device for uninterrupted operation between two ring main units

Technical Field

The utility model relates to a bypass connecting device that is used for operation of not having a power failure between two looped netowrk cabinets.

Background

When the underground cable between the two ring main units needs to be maintained abnormally, the bypass connecting device is laid on the ground and safety protection measures are taken, the bypass connecting device replaces the underground cable to supply power to the ring main units, and the purpose of maintenance without power outage (few power outage) is achieved.

The bypass connecting device mainly comprises a bypass switch, a cable terminal and a flexible cable, wherein the cable terminal is arranged at one end of the bypass switch and connected with a cable sleeve of the ring main unit, and the other end of the flexible cable is connected with the bypass switch.

At present, a cable sleeve positioned in a ring main unit mostly adopts a fully insulated, fully closed and fully sealed cable terminal, and the cable terminal and a cable connected with the cable terminal cannot be separated.

When laying the operation of bypass connecting device, because the space in looped netowrk cabinet entrance hole is less, and the volume that seals cable termination as an organic whole with bypass connecting device is great again, can't get into the looped netowrk cabinet through the entrance hole smoothly, causes the degree of difficulty increase that bypass connecting device and looped netowrk cabinet are connected, often enlarges the operation scope because of can't implement effectual looped netowrk cabinet and bypass connecting device's being connected, brings inconvenience for the maintenance operation that does not have a power failure.

Meanwhile, the grounding of the bypass connecting device is mainly realized through a grounding wire which is arranged on a metal shielding shell of the cable terminal and is connected with the ground, but the bypass connecting device mainly deals with fault rush repair and defect treatment and needs safe, rapid and convenient construction, and the grounding wire needs to be additionally erected when the bypass connecting device is laid in such a grounding mode, so that the construction time and the difficulty are increased, and inconvenience is brought to maintenance operation without power outage.

Disclosure of Invention

The utility model aims at providing a simple structure, convenient to use's a bypass connecting device that is used for the operation of not having a power failure between two looped netowrk cabinets for solve above-mentioned problem.

The purpose of the utility model is realized like this:

the utility model discloses a bypass connecting device that is used for the uninterrupted power operation between two looped netowrk cabinets, this bypass connecting device locates between two looped netowrk cabinets, including two flexible cable connecting device and a shell earthing bypass switch, two flexible cable connecting device's one end is connected respectively on the corresponding looped netowrk cabinet, and the other end all is connected on the bypass switch, flexible cable connecting device includes cable termination, flexible cable and plug-in quick-operation joint, cable termination and plug-in quick-operation joint locate respectively the both ends of flexible cable, flexible cable includes sheath, tinned copper wire shielding layer, inner sheath and tinned copper conductor from outside to inside, cable termination pegs graft on the cable sleeve pipe of looped netowrk cabinet, cable sleeve pipe includes base and the bolt that locates the base front end, plug-in quick-operation joint peg graft on the business turn over line sleeve pipe of bypass switch, wherein,

the cable terminal comprises a T-shaped sleeve, a cable wiring terminal and an insulating plug head, wherein the cable wiring terminal and the insulating plug head are arranged at one end of the flexible cable, the T-shaped sleeve comprises a transverse pipe part and a vertical pipe part which are communicated with each other, a base of the cable sleeve is inserted into the left side of the transverse pipe part, the bolt is horizontally arranged in the transverse pipe part, the cable wiring terminal is inserted from a lower port of the vertical pipe part and is sleeved on the bolt, the insulating plug head is inserted into the right side of the transverse pipe part, and the insulating plug head is in threaded connection with the front end of the bolt;

plug-in quick-operation joint is located including gluing core, cover metal casing and the central needle in the core outside glues, glue the core and include the upper and lower cavity that communicates each other through the through-hole, just the internal diameter of through-hole all is less than the internal diameter of upper and lower cavity, the central needle includes contact pin portion and wiring portion, just the external diameter of wiring portion is greater than the internal diameter of through-hole, contact pin portion follows the lower port of through-hole inserts and places in the epicoele is internal, wiring portion block in the lower port department of through-hole places in the cavity of resorption is internal, the tinned copper conductor of the flexible cable other end pegs graft in wiring portion, just the tinned copper wire shielding layer clamp of flexible cable is located between gluey core and the metal casing.

The utility model provides a cable termination comprises separable T type sleeve pipe and cable connecting terminal, during the construction, will have cable connecting terminal's cable to introduce from the entrance hole of looped netowrk cabinet earlier, inserts its lower port from the vertical pipe portion of T type sleeve pipe again, has made things convenient for cable termination and looped netowrk cabinet cable sleeve's connection greatly.

And simultaneously, the utility model discloses utilize the characteristic of the whole line intercommunication of flexible cable shielded wire, lead to bypass switch department with the ground point from cable terminal department, because bypass switch itself is grounded, consequently need not to erect in addition the earth connection, the bypass connecting device construction of being convenient for and the maintenance operation of not having a power failure still are applicable to the less condition in looped netowrk cabinet space simultaneously, improve the circuit reliability of supplying power greatly.

Therefore, the utility model discloses bypass connecting device simple structure, convenient to use have reduced the operation scope, are convenient for overhaul the operation without power failure, improve circuit power supply reliability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the middle flexible cable connection device of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Please refer to fig. 1, which shows the bypass connection device for uninterrupted operation between two ring main units of the present invention, the bypass connection device is disposed between two ring main units 1, including two flexible cable connection devices 10 and a shell grounding bypass switch 3, one end of two flexible cable connection devices 10 is connected to the corresponding ring main unit 1, and the other end is connected to the bypass switch 3.

Referring to fig. 2, the flexible cable connection device is shown, the flexible cable connection device 10 includes a cable terminal, a flexible cable 9 and a plug-in quick connector 2, the flexible cable 9 includes a sheath 94, a tinned copper wire shielding layer 93, an inner protection layer 92 and a tinned copper conductor 91 from outside to inside, the cable terminal is plugged in a cable sleeve of the ring main unit 1, the cable sleeve includes a base 81 and a bolt 82 arranged at the front end of the base 81, and the plug-in quick connector 2 is plugged in an in-out cable sleeve 31 of the bypass switch 3;

the cable terminal comprises a T-shaped sleeve 5, a cable wiring terminal 71 and an insulation plugging head 6, wherein the cable wiring terminal 71 and the insulation plugging head 6 are arranged at one end of a flexible cable 9, the T-shaped sleeve 5 comprises a transverse pipe part 51 and a vertical pipe part 52 which are mutually communicated, and an inner cavity at the intersection of the transverse pipe part 51 and the vertical pipe part 52 is a square hole 53; the base 81 of the cable bushing is inserted to the left of the transverse tube 51, and the bolt 82 is horizontally placed in the transverse tube 51; the cable connecting terminal 71 is inserted from the lower port of the vertical pipe part 52 and is arranged in the square hole 53, and the cable connecting terminal 71 is sleeved on the bolt 82; the insulation blocking head 6 is inserted at the right side of the transverse pipe part 51, an internal threaded hole 61 matched with the external thread of the bolt 82 is formed in the top surface of the insulation blocking head 6, and the front end of the bolt 82 is screwed in the internal threaded hole 61;

the plug-in type quick connector 2 comprises a rubber core 21, a metal shell 22 sleeved outside the rubber core 21 and a central needle 4, the rubber core 21 comprises an upper cavity 211 and a lower cavity 212 which are communicated with each other through a through hole 213, the inner diameter of the through hole 213 is smaller than the inner diameters of the upper cavity 211 and the lower cavity 212 respectively, the central needle 4 comprises a pin part 41 and a wiring part 42, the outer diameter of the wiring part 42 is larger than the inner diameter of the through hole 213, the pin part 41 is inserted into the upper cavity 211 from the lower port of the through hole 213, the wiring part 42 is clamped at the lower port of the through hole 213 and is arranged in the lower cavity 212, a tin-plated copper conductor 91 of a flexible cable 9 is inserted into the wiring part 42, a tin-plated copper wire shielding layer 93 of the flexible cable 9 is clamped between the rubber core 21 and the metal shell 22, an in-out bushing 31 of a bypass switch 3 comprises an inner core 312 and a metal sheath 311 arranged outside the inner core 312, the, the metal sheath 311 is embedded between the rubber core 21 and the metal shell 22, the metal sheath 311 is connected with the shell of the bypass switch 3, and the shell of the bypass switch 3 is grounded.

During the construction, introduce earlier the flexible cable 9 that has cable terminal 71 from the entrance hole of looped netowrk cabinet 1, then insert it from the lower port of the vertical pipe portion 52 of T type sleeve 5, make cable terminal 71 be located quad slit 53, peg graft on cable sheathing's base 81 with the left side port of the horizontal pipe portion 51 of T type sleeve 5, make the bolt 82 of base 81 front end wear to overlap in cable terminal 71 and be located horizontal pipe portion 51, peg graft in the right side port of horizontal pipe portion 51 with insulating shutoff head 6 at last, and make the front end of bolt 82 connect in internal thread hole 61 soon, accomplished from this the utility model discloses well cable terminal and 3 cable sheathing's of looped netowrk cabinet are connected.

Meanwhile, because the tinned copper wire shielding wire 93 of the flexible cable 9 is communicated in a full-line manner, the grounding point can be led to the shell of the bypass switch 3 from the cable terminal end of the flexible cable 9 through the metal shell 22 of the plug-in quick connector 2 and the metal sheath 311 of the wire inlet and outlet sleeve 31, and the shell of the bypass switch 3 is grounded, so that the grounding wire does not need to be additionally erected, and the bypass connecting device is convenient to connect, construct and maintain without power failure.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.

Claims (1)

1. A bypass connecting device for uninterrupted operation between two ring main units is arranged between the two ring main units and comprises two flexible cable connecting devices and a bypass switch with a grounded shell, one ends of the two flexible cable connecting devices are respectively connected to the corresponding ring main units, the other ends of the two flexible cable connecting devices are connected to the bypass switch, each flexible cable connecting device comprises a cable terminal, a flexible cable and a plug-in quick connector, the cable terminal and the plug-in quick connector are respectively arranged at two ends of the flexible cable, the flexible cable comprises a sheath, a tinned copper wire shielding layer, an inner protective layer and a tinned copper conductor from outside to inside, the cable terminal is plugged on a cable sleeve of the ring main units, the cable sleeve comprises a base and a bolt arranged at the front end of the base, the plug-in quick connector is plugged on a wire inlet sleeve of the bypass switch, it is characterized in that the preparation method is characterized in that,

the cable terminal comprises a T-shaped sleeve, a cable wiring terminal and an insulating plug head, wherein the cable wiring terminal and the insulating plug head are arranged at one end of the flexible cable, the T-shaped sleeve comprises a transverse pipe part and a vertical pipe part which are communicated with each other, a base of the cable sleeve is inserted into the left side of the transverse pipe part, the bolt is horizontally arranged in the transverse pipe part, the cable wiring terminal is inserted from a lower port of the vertical pipe part and is sleeved on the bolt, the insulating plug head is inserted into the right side of the transverse pipe part, and the insulating plug head is in threaded connection with the front end of the bolt;

plug-in quick-operation joint is located including gluing core, cover metal casing and the central needle in the core outside glues, glue the core and include the upper and lower cavity that communicates each other through the through-hole, just the internal diameter of through-hole all is less than the internal diameter of upper and lower cavity, the central needle includes contact pin portion and wiring portion, just the external diameter of wiring portion is greater than the internal diameter of through-hole, contact pin portion follows the lower port of through-hole inserts and places in the epicoele is internal, wiring portion block in the lower port department of through-hole places in the cavity of resorption is internal, the tinned copper conductor of the flexible cable other end pegs graft in wiring portion, just the tinned copper wire shielding layer clamp of flexible cable is located between gluey core and the metal casing.

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