CN209894876U - A system for realizing non-contact high-voltage live indication using through-wall terminals - Google Patents

Abstract

The utility model belongs to the technical field of the high-voltage electricity indicates, concrete technical scheme is: a system for realizing non-contact high-voltage live indication by using a through-wall terminal comprises a three-phase alternating-current power supply, the through-wall terminal and a rectification and live indication circuit, wherein a metal annular screw sleeve on the through-wall terminal is separated from a central conductor by an insulating medium, a metal induction ring is separated from the central conductor by the insulating medium, the metal annular screw sleeve is connected with a high-voltage device box body through-wall, the centers of two sides of the central conductor are respectively provided with an internal thread hole, the internal thread holes are connected with a high-voltage bus of the three-phase alternating-current power supply through a lead, an outer nut of the metal induction ring is connected with the rectification and live indication circuit, and the capacitance effect of the metal induction ring, the induction voltage that size output expectation that can rational design wear the wall terminal need not additionally to increase sensor and working power supply and can realize the electrified instruction of non-contact high pressure, has solved the electrified potential safety hazard difficult problem of instructing of mine high voltage distribution equipment.

Description

A system for realizing non-contact high-voltage live indication using through-wall terminals

technical field

The utility model belongs to the technical field of high-voltage live indication, in particular to a system for realizing non-contact high-voltage live indication by using a wall-penetrating terminal.

Background technique

At present, the mine high-voltage power distribution device and the high-voltage live indicating system in the mobile substation are composed of high-voltage sensors and live indicating devices. The high-voltage live indication system indicates the live state of the high-voltage incoming line, which provides a basis for the correct and reasonable operation of the device, and provides an important guarantee for the safety of operators and maintenance personnel. However, most of the high-voltage sensors are directly connected with high-voltage, which can easily cause high-voltage breakdown and cause accidents. Therefore, the performance of the sensor directly affects the reliability and durability of the high-voltage live indication system, which brings hidden dangers to mine safety. However, the existing non-contact high-voltage live indicating system requires an additional power supply to realize high-voltage indicating, which increases the complexity of the system. The on-off of the external power supply can easily affect the correct indicating of the high-voltage live indicating system, resulting in misoperation.

Utility model content

In order to solve the technical problems existing in the prior art, the utility model provides a system for realizing non-contact high-voltage live indication by using through-wall terminals, without adding sensors and other external power sources, and the system installation is flexible.

In order to achieve the above purpose, the technical scheme adopted by the present invention is as follows: a system for realizing non-contact high-voltage live indication by using wall terminals, including three-phase AC power supply, wall terminals, rectification and live indication circuits.

The through-wall terminal includes a center conductor, a metal annular screw sleeve arranged concentrically with the center conductor, and a metal induction ring arranged concentrically with the center conductor. Divided by the insulating medium, the metal ring screw sleeve is connected to the high-voltage device box through the wall, the center of both sides of the center conductor is provided with internal threaded holes, and the internal threaded holes are connected to the high-voltage busbar of the three-phase AC power supply through the wires. A lead wire is attached to the outer nut.

The rectification and live indication circuit includes a varistor VR, a rectifier bridge D, a resistor R and a light-emitting diode LED. The first output end of the rectifier bridge D is connected to the resistor R, the light emitting diode LED, and the second output end of the rectifier bridge D in sequence.

Among them, preferably, the central conductor is a metal core rod.

Compared with the prior art, the utility model has the following specific beneficial effects: the utility model overcomes the disadvantages of potential safety hazards, unreliable operation and poor durability in the current live indication system in the current mine high-voltage power distribution equipment, and uses The principle of metal induction ring and capacitance can realize non-contact high-voltage live indication without additional sensors and working power supply. The high-voltage indicating system is flexible in installation and reliable in indication, which solves the hidden safety problem of live indication of high-voltage power distribution equipment in mines.

Description of drawings

FIG. 1 is a block diagram of the system structure of the present invention.

FIG. 2 is a schematic cross-sectional view of the structure of the through-wall terminal in FIG. 1 .

FIG. 3 is a circuit schematic diagram of the rectification and live indication circuit in FIG. 1 .

FIG. 4 is a schematic diagram 1 of the specific connection of the rectification and live indication circuit.

FIG. 5 is a schematic diagram 2 of the specific connection of the rectification and live indication circuit.

FIG. 6 is a schematic diagram 3 of the specific connection of the rectification and live indication circuits.

In the figure, 1 is a three-phase AC power supply, 2 is a wall terminal, 21 is a central conductor, 22 is a metal ring threaded sleeve, 23 is a metal induction ring, 24 is an insulating medium, 25 is an internal thread hole, and 3 is rectifier and live. In the indicating circuit, 31 is a varistor VR, 32 is a rectifier bridge D, 33 is a resistor R, 34 is a light emitting diode LED, 35 is a first output terminal, and 36 is a second output terminal.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

As shown in FIG. 1 , a system for realizing non-contact high-voltage live indication using through-the-wall terminals includes a three-phase AC power supply 1 , a through-wall terminal 2 , a rectification and a live-indicating circuit 3 , and the center conductor 21 of the through-wall terminal 2 is connected to The three-phase AC power supply 1 is connected, and the input end of the rectification and live indication circuit 3 is connected to the outer nut of the metal ring of the wall terminal 2 through a wire.

As shown in FIG. 2 , the through-wall terminal 2 includes a center conductor 21 , a metal annular screw sleeve 22 arranged concentrically with the center conductor 21 , and a metal induction ring 23 arranged concentrically with the center conductor 21 . The space is divided by the insulating medium 24, the metal induction ring 23 and the central conductor 21 are divided by the insulating medium 24, the metal annular screw sleeve 22 is connected with the high-voltage device box through the wall, and the center of both sides of the central conductor 21 is opened with internal thread holes 25. The inner threaded hole 25 is connected to the high-voltage bus bar of the three-phase AC power supply 1 through a wire. The outer nut of the metal induction ring 23 is connected to the rectification and live indication circuit 3, and the capacitance effect of the metal induction ring 23 on the wall terminal 2 can be used to reasonably design the size of the wall terminal 2 and output the expected induced voltage.

As shown in FIG. 3 , the rectification and live indication circuit 3 includes a varistor VR31, a rectifier bridge D32, a resistor R33 and a light-emitting diode LED34. Both ends of the varistor VR31 are connected in parallel with the metal induction ring 23, and the varistor VR31 is connected in parallel to the The lead wire of the metal induction ring 23 of the two-phase through-wall terminal 2, the two ends of the varistor VR31 are also connected to the two input ends of the rectifier bridge D32, and the first output end 35 of the rectifier bridge D32 is connected to the resistor R33 and the light emitting diode in turn. The LED 34 and the second output terminal 36 of the rectifier bridge D32 are connected.

As shown in FIG. 4 , FIG. 5 and FIG. 6 , the rectification and charging indicating circuit 3 is used to connect the line voltages between different phases of the three-phase AC power supply 1 .

Among them, preferably, the central conductor 21 is a metal core rod.

The utility model utilizes the metal induction ring 23 on the wall-penetrating terminal 2 and the principle of capacitance to sense the voltage of the high-voltage power supply, and then performs non-contact high-voltage live indication, saves sensors, and the high-voltage indication system is flexible, reliable and durable, and solves the problem of high-voltage power distribution equipment in mines. The safety hazard of live indication is especially suitable for high-voltage live indication in mine high-voltage power distribution devices and mobile substations.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of the utility model.

Claims (2)

1. A system for realizing non-contact high-voltage live indication by using a through-wall terminal, characterized in that it comprises a three-phase AC power supply (1), a through-wall terminal (2), a rectification and a live indication circuit (3); The through-wall terminal (2) comprises a center conductor (21), a metal annular screw sleeve (22) arranged concentrically with the center conductor (21), and a metal induction ring (23) arranged concentrically with the center conductor (21). The metal annular screw sleeve (22) and the central conductor (21) are separated by an insulating medium (24), and the metal induction ring (23) and the central conductor (21) are separated by an insulating medium (24). Both sides of the conductor (21) are provided with inner threaded holes (25), and the inner threaded holes (25) are connected with the high-voltage busbar of the three-phase AC power supply (1) through wires, and the metal induction ring (23) is connected with a pinout; The rectification and live indication circuit (3) includes a varistor VR (31), a rectifier bridge D (32), a resistor R (33) and a light-emitting diode LED (34). The terminal is connected in parallel with the metal induction ring (23), and the two ends of the varistor VR (31) are also connected with the two input terminals of the rectifier bridge D (32), the first output terminal of the rectifier bridge D (32) ( 35) Connect to the resistor R (33), the light emitting diode LED (34), and the second output end (36) of the rectifier bridge D (32) in sequence. 2 . The system for realizing non-contact high-voltage live indication using through-wall terminals according to claim 1 , wherein the central conductor ( 21 ) is a metal mandrel. 3 .

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