CN203103772U - A grounding structure for bypass cables - Google Patents

Abstract

The utility model discloses a grounding structure for a bypass cable, which comprises a flexible cable, a plug-in quick connector and a bypass switch for earthing the casing. Type quick connector includes a rubber core, a metal shell and a center pin. The center pin is set in the rubber core, including the pin part and the wiring part. The tinned copper conductor of the flexible cable is inserted into the wiring part, and the tinned copper wire shield of the flexible cable The layer is sandwiched between the rubber core and the metal shell, the pin part is inserted into the inner core of the bypass switch inlet and outlet bushing, and the metal sheath is embedded between the rubber core and the metal shell. The utility model utilizes the characteristics of full-line connection of the flexible cable shielding wire to lead the grounding point from the elbow head to the bypass switch without additional grounding wires, which is convenient for bypass cable construction and non-stop maintenance operations, and is also suitable for environmental The space of network cabinet or box transformer is small, which greatly improves the reliability of line power supply.

Description

A grounding structure for bypass cables

technical field

The utility model relates to a grounding structure for bypass cables.

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, an elbow head 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 It is realized by the grounding wire connected to the ground on the metal shielding shell of the elbow head. However, since the bypass cable is mainly used for emergency repairs and defect handling, it needs to be safe, fast, and convenient for construction. It is also necessary to erect an additional grounding wire when connecting cables, which increases the construction time and difficulty, and brings inconvenience to maintenance operations 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 elbow head is even greater.

Contents of the invention

The purpose of this utility model is to provide a grounding structure for bypass cables with simple structure and convenient use in order to solve the above problems.

The purpose of this utility model is achieved in that:

A grounding structure for a bypass cable of the utility model includes a flexible cable, a plug-in quick connector and a bypass switch for earthing the shell, and the flexible cable includes a sheath and a tinned copper wire shielding layer from the outside to the inside , an inner sheath and a tinned copper conductor, the plug-in quick connector is arranged at one end of the flexible cable, and the plug-in quick connector is plugged into the inlet and outlet bushing on the bypass switch shell, 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 of the flexible cable is plugged into the wiring The tinned copper wire shielding layer of the flexible cable is sandwiched between the rubber core and the metal shell, and the inlet and outlet sleeves of the bypass switch include an inner core and a metal sheath outside the inner core , the pin portion is inserted into the inner core, and the metal sheath is embedded between the rubber core and the metal shell.

The utility model utilizes the characteristics of full-line connection of the flexible cable shielding wire to lead the grounding point from the elbow head to the bypass switch without additional grounding wires, which is convenient for bypass cable construction and non-stop maintenance operations, and is also suitable for environmental The space of network cabinet or box transformer is small, which greatly improves the reliability of line power supply.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Please refer to Figure 1, the utility model is used for the grounding structure of the bypass cable, including a flexible cable 1, a plug-in quick connector 2 and a bypass switch 3 for grounding the shell, and the flexible cable 1 includes a sheath 14, a plated Tin copper wire shielding layer 13, inner sheath 12 and tinned copper conductor 11, plug-in quick connector 2 includes rubber core 21, metal shell 22 and center pin 4 sleeved on the outside of rubber core 21, rubber core 21 includes through The upper cavity 211 and the lower cavity 212 communicate with each other through the through hole 213, and the inner diameters of the through hole 213 are smaller than the inner diameters of the upper cavity 211 and the lower cavity 212 respectively, and the center pin 4 includes a pin insertion part 41 and a wiring part 42, and 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 from the lower port of the through hole 213 and placed in the upper cavity 211, and the connecting part 42 is engaged with the lower port of the through hole 213 and placed In the lower cavity 212, the tinned copper conductor 11 of the flexible cable 1 is plugged into the connection 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, bypassing The inlet and outlet casing 31 of the switch 3 includes an inner core 312 and a metal sheath 311 arranged outside the inner core 312, the pin part 41 is inserted into the inner core 312, and the metal sheath 311 is embedded in the rubber core 21 and the metal shell 22 between.

Since the tinned copper wire shielding wire 13 of the flexible cable 1 is fully connected, the grounding point can be passed from the elbow head at the other end of the flexible cable 1 through the metal shell 22 of the plug-in quick connector 2 and the inlet and outlet sleeves 31 The metal sheath 311 of the bypass switch 3 leads to the shell of the bypass switch 3, and the shell of the bypass switch 3 itself is grounded, so that there is no need to erect an additional grounding wire, which is convenient for bypass cable construction and maintenance without power failure.

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

Claims (1)

1. A grounding structure for bypass cables, including a flexible cable, a plug-in quick connector and a bypass switch for shell grounding, the flexible cable includes a sheath, a tinned copper wire shielding layer, an inner Sheath and tinned copper conductor, the plug-in quick connector is arranged at one end of the flexible cable, and the plug-in quick connector is plugged into the inlet and outlet bushing on the bypass switch shell, its features That is, the plug-in quick connector includes a rubber core, a metal shell sheathed on the outside of the rubber core, and a central pin, and the rubber core includes upper and lower cavities communicated with each other through through holes, and the through holes The inner diameters of the inner diameters are smaller than the inner diameters of the upper and lower cavities, the central needle 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 through hole The lower port of the through hole 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, the tinned copper conductor 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, and the inlet and outlet sleeves of the bypass switch include an inner core and a metal core outside the inner core. The sheath, the pin part is inserted into the inner core, and the metal sheath is embedded between the rubber core and the metal shell.

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