CN112242272B

CN112242272B - Fuse non-maintaining looped netowrk cabinet

Info

Publication number: CN112242272B
Application number: CN201910649690.6A
Authority: CN
Inventors: 张鼎
Original assignee: Jiangsu Hanchen Electrical Technology Co ltd
Current assignee: Jiangsu Hanchen Electrical Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2022-05-27
Anticipated expiration: 2039-07-18
Also published as: CN112242272A

Abstract

The application provides a maintenance-free ring main unit of fuse, including the cabinet body, leading-out terminal, incoming line terminal, transformer and electromagnetic means. When the power supply of the ring main unit is abnormal and exceeds the rated voltage or current value, the current or voltage value output by the transformer is increased, so that the magnetic force of the first electromagnet and the second electromagnet is enhanced, the mutual repulsion force of the first electromagnet and the second electromagnet is increased, the acting force of the spring is overcome, the outgoing line contact end and the incoming line contact end are separated, and the function of open circuit protection is achieved. When the voltage or current value in the ring main unit is recovered to be normal, the current or voltage value output by the transformer is recovered to be normal, so that the magnetic force of the first electromagnet and the second electromagnet is reduced, the repulsive force of the first electromagnet and the second electromagnet is reduced, the acting force of the spring cannot be overcome, and the outgoing line contact end and the incoming line contact end are closed, so that the purposes of maintenance and replacement of the circuit breaker are achieved.

Description

Fuse non-maintaining looped netowrk cabinet

Technical Field

This application belongs to looped netowrk cabinet device field, concretely relates to maintenance-free looped netowrk cabinet of fuse.

Background

The ring main unit is a group of electric equipment which is arranged in a metal or nonmetal insulating cabinet body or is made into an assembled interval ring main power supply unit, the core part of the ring main unit adopts a load switch and a fuse, the ring main unit has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like, and is widely used in distribution stations and box-type substations of load centers of urban residential districts, high-rise buildings, large-scale public buildings, factory enterprises and the like.

The existing ring main unit generally needs to use a fuse for protecting electrical equipment in the ring main unit. However, when the existing fuse protector is abnormal (when the main current or voltage exceeds the rated value), the fuse in the fuse protector can be fused, so that the electrical elements in the ring main unit can be protected.

However, when the current or voltage returns to normal values, personnel are required to replace the burnt fuse with a new one, which requires the equipment to be powered down or poses a significant threat to maintenance personnel. However, the loss caused by the power failure of the ring main unit is also small, so that a ring main unit with a maintenance-free fuse is urgently needed.

Disclosure of Invention

To the not enough of prior art, this application provides a maintenance-free looped netowrk cabinet of fuse to solve the problem that current looped netowrk cabinet fuse damages the back and need change the maintenance.

The application provides a maintenance-free ring main unit of a fuse, which comprises a cabinet body, an outlet terminal, an inlet terminal, a transformer and an electromagnetic device;

the bottom end of the outgoing line terminal comprises a slidable outgoing line contact end, and the top end of the incoming line terminal comprises a slidable incoming line contact end;

the electromagnetic device comprises a first electromagnet, a second electromagnet, a slide way, a first insulating rod and a second insulating rod, wherein the first electromagnet and the second electromagnet slide on the slide way, two ends of the first insulating rod are respectively connected with contact ends of the first electromagnet and an outgoing line, and two ends of the second insulating rod are respectively connected with contact ends of the second electromagnet and the outgoing line;

the structure of the outgoing line contact end is the same as that of the incoming line contact end, wherein the outgoing line contact end comprises a sliding end, a spring and a fixed end, the cross section of the fixed end is inverted T-shaped, the sliding end is provided with a sliding groove with a flange, and the sliding end slides along the axial direction of the fixed end under the action of the spring;

the transformer is connected with the incoming line terminal and used for supplying power to the first electromagnet and the second electromagnet;

when the ring main unit outputs the maximum value, the current output by the transformer enables the first electromagnet and the second electromagnet to overcome the acting force of the spring, the first electromagnet and the second electromagnet move oppositely on the slide way, and therefore the outgoing line contact end is separated from the incoming line contact end.

Preferably, an insulating layer is arranged between the outgoing line contact end and the incoming line terminal of the transformer and the electromagnetic device, and a gap for moving the first insulating rod and the second insulating rod is arranged at a position corresponding to the insulating layer of the electromagnetic device.

Preferably, the cabinet body includes a plurality of groups of wire outlet terminals, wire inlet terminals, a transformer and an electromagnetic device, and an insulating layer is filled between each group of wire outlet terminals, each group of wire inlet terminals, each group of transformer and each group of electromagnetic device.

According to the technical scheme, the application provides a maintenance-free ring main unit of fuse, including the cabinet body, outlet terminal, inlet wire terminal, transformer and electromagnetic means. When the ring main unit outputs the maximum value which is normal, the first electromagnet and the second electromagnet can overcome the acting force of the spring, and the first electromagnet and the second electromagnet move oppositely on the slide way, so that the outgoing line contact end and the incoming line contact end are separated.

Therefore, when the power supply of the ring main unit is abnormal and exceeds the rated voltage or current value, the current or voltage value output by the transformer is increased, so that the magnetic force of the first electromagnet and the second electromagnet is enhanced, the mutual repulsion force of the first electromagnet and the second electromagnet is increased, the acting force of the spring is overcome, the outgoing line contact end is separated from the incoming line contact end, and the function of open circuit protection is achieved. When the voltage or current value in the ring main unit is recovered to be normal, the current or voltage value output by the transformer is recovered to be normal, so that the magnetic force of the first electromagnet and the second electromagnet is reduced, the repulsive force of the first electromagnet and the second electromagnet is reduced, the acting force of the spring cannot be overcome, and the outgoing line contact end and the incoming line contact end are closed, so that the purposes of maintenance-free and replacement-free of the circuit breaker are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a maintenance-free ring main unit of a fuse according to the present application;

fig. 2 is a schematic structural diagram of the outgoing line contact end of the present application;

fig. 3 is a schematic structural diagram of an electromagnetic device according to the present application.

Detailed Description

The technical solutions in the embodiments shown in the present application will be clearly and completely described below with reference to the drawings in the embodiments shown in the present application.

Referring to fig. 1, the present application provides a maintenance-free ring main unit of a fuse, including a main body 1, an outlet terminal 2, an inlet terminal 3, a transformer 4 and an electromagnetic device 5; the bottom end of the outgoing line terminal 2 comprises a slidable outgoing line contact end 21, and the top end of the incoming line terminal 3 comprises a slidable incoming line contact end 31; the electromagnetic device 5 comprises a first electromagnet 51, a second electromagnet 52, a slideway 53, a first insulating rod 54 and a second insulating rod 55, wherein the first electromagnet 51 and the second electromagnet 52 slide on the slideway 53, two ends of the first insulating rod 54 are respectively connected with the first electromagnet 51 and the outgoing line contact end 21, and two ends of the second insulating rod 55 are respectively connected with the second electromagnet 52 and the outgoing line contact end 31; the structure of the wire contact end 21 is the same as that of the wire inlet contact end 31, wherein the wire contact end 21 comprises a sliding end 211, a spring 212 and a fixed end 213, the cross section of the fixed end 213 is an inverted T shape, the sliding end 211 is provided with a sliding groove with a flange, and the sliding end 211 slides along the axial direction of the fixed end 213 under the action of the spring 212; the transformer 4 is connected to the inlet terminal 3 for supplying power to the first electromagnet 51 and the second electromagnet 52; when the ring main unit outputs the maximum normal value, the current output by the transformer 4 makes the first electromagnet 51 and the second electromagnet 52 overcome the acting force of the spring, and when the output of the ring main unit exceeds the maximum normal value, the first electromagnet 51 and the second electromagnet 52 move on the slideway 53 in an opposite way, so that the wire contact end 21 is separated from the wire contact end 31.

When the power supply of the ring main unit is abnormal, after the power supply exceeds the rated voltage or the current value, the current or the voltage value output by the transformer 4 is increased, so that the magnetic force of the first electromagnet 51 and the second electromagnet 52 is enhanced, the mutual repulsive force of the first electromagnet 51 and the second electromagnet 52 is increased, the acting force of the spring is overcome, the outgoing line contact end 21 is separated from the incoming line contact end 31, and the function of circuit breaking protection is achieved. When the voltage or current value in the ring main unit is recovered to be normal, the current or voltage value output by the transformer 4 is also recovered to be normal, so that the magnetic force of the first electromagnet 51 and the second electromagnet 52 is reduced, the mutual repulsion force of the first electromagnet 51 and the second electromagnet 52 is reduced, the acting force of the spring action cannot be overcome, and the outgoing line contact end 21 and the incoming line contact end 31 are closed, so that the purposes of maintenance-free and replacement-free of the circuit breaker are achieved.

An insulating layer is arranged between the uniform outlet terminal 2 and the inlet terminal 3 of the transformer 4 and the electromagnetic device 5, wherein a gap for moving the first insulating rod 54 and the second insulating rod 55 is arranged at the corresponding position of the insulating layer of the electromagnetic device 5. The insulating layer can reduce the distance between the transformer 4 and the electromagnetic device 5 and the outlet terminal 2 and the inlet terminal 3, thereby not only improving the safety of the equipment, but also being beneficial to the miniaturization of the equipment.

The cabinet body 1 comprises a plurality of groups of wire outlet terminals 2, wire inlet terminals 3, transformers 4 and electromagnetic devices 5, and insulating layers are filled among each group of wire outlet terminals 2, wire inlet terminals 3, transformers 4 and electromagnetic devices 5.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A maintenance-free ring main unit of a fuse is characterized by comprising a cabinet body (1), an outlet terminal (2), an inlet terminal (3), a transformer (4) and an electromagnetic device (5);

the bottom end of the outgoing line terminal (2) comprises a slidable outgoing line contact end (21), and the top end of the incoming line terminal (3) comprises a slidable incoming line contact end (31);

the electromagnetic device (5) comprises a first electromagnet (51), a second electromagnet (52), a slide way (53), a first insulating rod (54) and a second insulating rod (55), wherein the first electromagnet (51) and the second electromagnet (52) slide on the slide way (53), two ends of the first insulating rod (54) are respectively connected with the first electromagnet (51) and the outgoing line contact end (21), and two ends of the second insulating rod (55) are respectively connected with the second electromagnet (52) and the incoming line contact end (31);

the structure of the outgoing line contact end (21) is the same as that of the incoming line contact end (31), wherein the outgoing line contact end (21) comprises a sliding end (211), a spring (212) and a fixed end (213), the cross section of the fixed end (213) is inverted T-shaped, the sliding end (211) is provided with a sliding groove with a flange, and the sliding end (211) slides along the axial direction of the fixed end (213) under the action of the spring (212);

the transformer (4) is connected with the incoming line terminal (3) and is used for supplying power to the first electromagnet (51) and the second electromagnet (52);

when the ring main unit outputs the maximum value which is normal, the current output by the transformer (4) enables the first electromagnet (51) and the second electromagnet (52) to overcome the acting force of the spring, and the first electromagnet (51) and the second electromagnet (52) move oppositely on the slide way (53) so that the outgoing contact end (21) is separated from the incoming contact end (31).

2. The maintenance-free ring main unit of the fuse is characterized in that an insulating layer is arranged between the uniform outlet terminal (2) of the transformer (4) and the electromagnetic device (5) and the inlet terminal (3), wherein a gap for moving the first insulating rod (54) and the second insulating rod (55) is arranged at the corresponding position of the insulating layer of the electromagnetic device (5).

3. The maintenance-free ring main unit of fuse according to claim 2, wherein the main unit (1) includes a plurality of groups of wire outgoing terminals (2), wire incoming terminals (3), a transformer (4) and an electromagnetic device (5), and an insulating layer is filled between each group of wire outgoing terminals (2), wire incoming terminals (3), transformer (4) and electromagnetic device (5).