CN103036193A - Flexible cable connection device for American ring main unit - Google Patents

Abstract

The invention discloses a flexible cable connection device for an American-style ring network cabinet, which includes a cable terminal, a flexible cable and a plug-in quick joint. The connector is plugged into the inlet and outlet bushing of the bypass switch. The invention 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 setting up additional grounding wires. The flexible cable connecting device of the present invention is simple in structure, easy to use, reduces the scope of work, facilitates non-stop maintenance operations, and improves the reliability of line power supply.

Description

A flexible cable connection device for American ring network cabinet

technical field

The invention relates to a flexible cable connection device for an American ring network cabinet.

Background technique

When the underground cable between the two ring network cabinets is abnormal and needs to be repaired, after laying the bypass cable on the ground and taking safety protection measures, the bypass cable replaces the underground cable to supply power to the ring network cabinet, so as to achieve the purpose of maintenance without power failure (less power failure) .

The bypass cable is mainly composed of a bypass switch, a cable terminal connected to the cable sleeve of the ring network cabinet at one end, and a flexible cable connected to the bypass switch at the other end. At present, the grounding of the bypass cable is mainly through the design It is realized by the grounding wire connected to the ground on the metal shielding shell of the cable terminal. However, since the bypass cable is mainly used for fault repair and defect treatment, it needs to be safe, fast and convenient for construction. This grounding method makes the laying of the bypass cable It is also necessary to erect an additional grounding wire, which increases the construction time and difficulty, and brings inconvenience to the maintenance operation without power failure.

At the same time, in the case of a small space for the ring network cabinet or box transformer, the construction difficulty of erecting the grounding wire on the cable terminal is even greater.

Contents of the invention

The object of the present invention is to provide a flexible cable connection device for American-style ring network cabinets with simple structure and convenient use in order to solve the above problems.

The purpose of the present invention is achieved like this:

A flexible cable connection device for an American-style ring network cabinet according to the present invention includes a cable terminal, a flexible cable and a plug-in quick connector, and the cable terminal and the plug-in quick connector are respectively arranged at both ends of the flexible cable , the flexible cable includes a sheath, a tinned copper wire shielding layer, an inner sheath, and a tinned copper conductor from the outside to the inside, and the cable terminal is plugged into the cable sleeve of the American ring network cabinet. The plug-in quick connector is inserted on the inlet and outlet bushing of the bypass switch, wherein:

The cable terminal includes an elbow sleeve, a cable crimping terminal provided at one end of the flexible cable and a plug-in rod, the cable crimping terminal is inserted through the lower port of the elbow-shaped sleeve, and the plug-in rod Inserted from the upper port of the elbow-shaped sleeve, one end of which is fixed on the cable crimping terminal, and the other end protrudes from the upper port of the elbow-shaped sleeve;

The plug-in quick connector includes a rubber core, a metal shell set outside the rubber core, and a center pin. The rubber core includes upper and lower cavities that communicate with each other through through holes, and the inner diameter of the through hole Both are smaller than the inner diameters of the upper and lower cavities, the central pin includes a pin part and a wiring part, and the outer diameter of the wiring part is larger than the inner diameter of the through hole, and the pin part is connected from the bottom of the through hole The port is inserted into and placed in the upper cavity, the wiring part is engaged with the lower port of the through hole and placed in the lower cavity, and the tinned copper conductor at the other end of the flexible cable is plugged into the The tinned copper wire shielding layer of the flexible cable is sandwiched between the rubber core and the metal shell.

The above-mentioned flexible cable connection device for an American-style ring network cabinet, wherein the plug-in rod includes an end-to-end arc extinguishing rod and a conductive rod, the cable crimping terminal includes a wiring part and a connecting part, and the flexible The tinned copper conductor at one end of the cable is plugged into the wiring part, the connecting part is screwed to one end of the conductive rod, and one end of the arc extinguishing rod protrudes from the upper port of the elbow bushing.

The invention utilizes the characteristics of full-line connection of the flexible cable shielding wire to lead the grounding point from the cable terminal to the bypass switch without setting up additional grounding wires, which is convenient for bypass cable construction and maintenance without power failure, and is also suitable for ring network cabinets In the case of small space, the reliability of line power supply is greatly improved.

The flexible cable connecting device of the present invention is simple in structure, easy to use, reduces the scope of work, facilitates non-stop maintenance operations, and improves the reliability of line power supply.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Please refer to Fig. 1, the flexible cable connecting device used in the American ring network cabinet of the present invention includes cable terminal, flexible cable 1 and plug-in quick connector 2, flexible cable 1 includes sheath 14, tinned copper wire from outside to inside The shielding layer 13, the inner sheath 12 and the tinned copper conductor 11, the cable terminal is inserted on the cable casing of the American ring network cabinet, and the plug-in quick connector 2 is inserted on the inlet and outlet casing 31 of the bypass switch 3 ;

The cable terminal includes an elbow sleeve 5, a cable crimping terminal and a plug rod. The cable crimping terminal includes a connection part 72 and a connection part 71. The tinned copper conductor 11 at one end of the flexible cable 1 is inserted into the connection part 72. The cable The crimping terminal is inserted through the lower port of the elbow bushing 5, and the plug-in rod includes an end-to-end arc extinguishing rod 62 and a conductive rod 61, and the plug-in rod is inserted into the upper port of the elbow-shaped bushing 5, and the right end of the conductive rod 61 The part is screwed with the connecting part 71, and the left end of the arc extinguishing rod 62 protrudes from the upper port of the elbow sleeve 5;

The plug-in quick connector 2 includes a rubber core 21, a metal shell 22 sleeved on the outside of the rubber core 21, and a center needle 4. The rubber core 21 includes an upper cavity 211 and a lower cavity 212 communicated with each other through a through hole 213, and through The inner diameters of the holes 213 are respectively smaller than the inner diameters of the upper cavity 211 and the lower cavity 212. The center pin 4 includes a pin part 41 and a connecting part 42, and the outer diameter of the connecting part 42 is larger than the inner diameter of the through hole 213. The pin part 41 is connected from the The lower port of the through hole 213 is inserted into and placed in the upper cavity 211, the connection part 42 is engaged with the lower port of the through hole 213 and placed in the lower cavity 212, and the tinned copper conductor 11 of the flexible cable 1 is inserted into the In the wiring part 42, and the tinned copper wire shielding layer 13 of the flexible cable 1 is sandwiched between the rubber core 21 and the metal shell 22, the inlet and outlet sleeves 31 of the bypass switch 3 include an inner core 312 and an inner core 312 The outer metal sheath 311, the pin part 41 is plugged into the inner core 312, 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 bypass The case of switch 3 is grounded.

Since the tinned copper shielding wire 13 of the flexible cable 1 is fully connected, the grounding point can be connected from the cable terminal end of the flexible cable 1 through the metal shell 22 of the plug-in quick connector 2 and the metal casing 31 of the incoming and outgoing wires. The sheath 311 leads to the shell of the bypass switch 3, and the shell of the bypass switch 3 itself is grounded, so there is no need to erect additional grounding wires, which is convenient for bypass cable construction and maintenance without power failure.

The above embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent The technical solutions should also belong to the category of the present invention and should be defined by each claim.

Claims (2)

1. connecting device for flexible cable that is used for American ring main unit, comprise cable termination, flexible cable and plug-in snap joint, the two ends of described flexible cable are located at respectively in described cable termination and plug-in snap joint, described flexible cable comprises sheath from outside to inside, the tinned copper wire screen, sheath and tinned copper conductor, described cable termination is plugged on the cable sleeve of described American ring main unit, described plug-in snap joint is plugged on the inlet-outlet sleeve of described by-pass switch, it is characterized in that

Described cable termination comprises the elbow molded cannula, is located at cable crimp type terminal and the plug bar of described flexible cable one end, described cable crimp type terminal is inserted by the lower port of described elbow molded cannula, described plug bar is inserted by the upper port of described elbow molded cannula and the one end is fixed on the described cable crimp type terminal, and the other end protrudes from the upper port of described elbow molded cannula;

Described plug-in snap joint comprises the glue core, be sheathed on metal shell and the center pin in the described glue core outside, described glue core comprise by through hole be interconnected upper, lower chamber, and the internal diameter of described through hole is all less than upper, the internal diameter of lower chamber, described center pin comprises contact pin section and wire connecting portion, and the external diameter of described wire connecting portion is greater than the internal diameter of described through hole, described contact pin section inserts and places in the described upper cavity from the lower port of described through hole, described wire connecting portion is sticked in the lower port place of described through hole and places in the described lower chamber, the tinned copper conductor of the described flexible cable other end is plugged in the described wire connecting portion, and the tinned copper wire screen of described flexible cable is located between described glue core and the metal shell.

2. a kind of connecting device for flexible cable for American ring main unit as claimed in claim 1, it is characterized in that, described plug bar comprises end to end arc extinguishing bar and conducting rod, described cable crimp type terminal comprises wire connecting portion and connecting portion, the tinned copper conductor of described flexible cable one end is plugged in the described wire connecting portion, one end of described connecting portion and described conducting rod is spirally connected, and a distal process of described arc extinguishing bar is for the upper port of described elbow molded cannula.

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