CN212518410U

CN212518410U - Automatic switching circuit of control power supply of mining explosion-proof multi-loop vacuum electromagnetic starter

Info

Publication number: CN212518410U
Application number: CN202021415608.8U
Authority: CN
Inventors: 盛文华; 丁洪刚; 葛磊; 孙友广; 张朋; 王传会; 罗明; 李伟; 郭洪伟; 王劲松
Original assignee: Yanzhou Dongfang Electromachanical Co ltd; Yankuang Group Corp Ltd
Current assignee: Yanzhou Dongfang Electromachanical Co ltd; Yankuang Group Corp Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-02-09
Anticipated expiration: 2030-07-17

Abstract

The utility model relates to a mining flame-proof type multiloop vacuum electromagnetic starter control power supply automatic switching circuit, fuse FU11, fuse FU12 connect between isolator one and transformer TC1 once side, play the current-limiting protection effect; the fuse FU21 and the fuse FU22 are connected between the second isolating switch and the primary side of the transformer TC2, and play a role in current limiting protection; the secondary side 220V wire of the transformer TC1 is connected with a miniature circuit breaker QF11, the lower port of the miniature circuit breaker QF11 and the secondary side 0V wire of the transformer TC1 are connected with the coil of the relay K1, and extend to form a passage with contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1; the secondary side 220V of the transformer TC2 is wired with a miniature breaker QF 21. The utility model discloses following beneficial effect has: simple structure, convenient to use, through isolator's the automatic switching control power of closing separating brake, solved artifical selection control power supply circuit and because the long problem that leads to the undervoltage dropout of drive unit of manual operation time, improved work efficiency, for the increase economic benefits of enterprise.

Description

Automatic switching circuit of control power supply of mining explosion-proof multi-loop vacuum electromagnetic starter

Technical Field

The utility model relates to an automatic switching circuit of mining flame-proof type multiloop vacuum electromagnetic starter control power belongs to vacuum electromagnetic starter control power manufacturing technical field.

Background

The control power supply of the mining flameproof and intrinsically safe multi-loop vacuum electromagnetic starter (hereinafter referred to as a combined switch) is usually adopted from a control transformer, and because the situation that only one isolating switch or only one isolating switch is switched on exists in the actual working condition, two control loops for supplying power to the switch are needed for the control transformer, such as a transformer TC1 and a transformer TC2 in fig. 1. A switch SA2 is then selected to switch back and forth between transformer TC1 and transformer TC2 to select the power supply for the control loop. Because the manual rotation of the change-over switch needs a certain time, the PLC can be powered down and restarted in the process of each switching, so that the drive unit is tripped under voltage.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: in order to solve one of the problems, the control power supply automatic switching circuit of the mining explosion-proof multi-loop vacuum electromagnetic starter is provided.

Automatic switching circuit of mining flame-proof type multiloop vacuum electromagnetic starter control power, including transformer TC1, transformer TC2, relay K1, miniature circuit breaker QF11, miniature circuit breaker QF21, fuse FU11, fuse FU12, fuse FU21 and fuse FU22, its characterized in that: the fuse FU11 and the fuse FU12 are connected between the first isolating switch and the primary side of the transformer TC1, and play a role in current limiting protection; the fuse FU21 and the fuse FU22 are connected between the second isolating switch and the primary side of the transformer TC2, and play a role in current limiting protection; the secondary side 220V wire of the transformer TC1 is connected with a miniature circuit breaker QF11, the lower port of the miniature circuit breaker QF11 and the secondary side 0V wire of the transformer TC1 are connected with the coil of the relay K1, and extend to form a passage with contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1; the secondary side 220V line of the transformer TC2 is connected with a miniature circuit breaker QF21, and the lower port of the miniature circuit breaker QF21, the secondary side 0V line of the transformer TC2 and contacts K1-1, K1-2, K1-3 and K1-4 of a relay K1 form a passage.

Preferably, the relay K1 is a contact intermediate relay.

Preferably, the contacts K1-1 and K1-3 are normally open contacts, and the contacts K1-2 and K1-4 are normally closed contacts.

Compared with the prior art, the utility model discloses following beneficial effect has: simple structure, convenient to use, through isolator's the automatic switching control power of closing separating brake, solved artifical selection control power supply circuit and because the long problem that leads to the undervoltage dropout of drive unit of manual operation time, improved work efficiency, for the increase economic benefits of enterprise.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of a control power supply circuit of a conventional vacuum electromagnetic starter;

fig. 2 is a schematic circuit diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Examples

As shown in fig. 2, the automatic switching circuit of the control power supply of the mining flameproof multi-loop vacuum electromagnetic starter comprises a transformer TC1, a transformer TC2, a relay K1, a miniature circuit breaker QF11, a miniature circuit breaker QF21, a fuse FU11, a fuse FU12, a fuse FU21 and a fuse FU22, and is characterized in that: the fuse FU11 and the fuse FU12 are connected between the first isolating switch and the primary side of the transformer TC1, and play a role in current limiting protection; the fuse FU21 and the fuse FU22 are connected between the second isolating switch and the primary side of the transformer TC2, and play a role in current limiting protection; the secondary side 220V wire of the transformer TC1 is connected with a miniature circuit breaker QF11, the lower port of the miniature circuit breaker QF11 and the secondary side 0V wire of the transformer TC1 are connected with the coil of the relay K1, and extend to form a passage with contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1; the secondary side 220V line of the transformer TC2 is connected with a miniature circuit breaker QF21, and the lower port of the miniature circuit breaker QF21, the secondary side 0V line of the transformer TC2 and contacts K1-1, K1-2, K1-3 and K1-4 of a relay K1 form a passage.

In this embodiment, the relay K1 is a contact intermediate relay; the contacts K1-1 and K1-3 are normally open contacts, and the contacts K1-2 and K1-4 are normally closed contacts.

The utility model discloses a theory of operation: the operator first closes the miniature circuit breakers QF11, QF21, keeping the control circuit open.

When the first isolating switch and the second isolating switch are in an opening state, the switch is in the opening state integrally, and the control loop is not powered;

when the first isolating switch is switched from an opening state to a closing state and the second isolating switch is kept in the opening state, the transformer TC1 is powered on, the transformer TC2 is powered off, the coil of the relay K1 is powered on, the relay K1 is attracted, the contacts K1-1 and K1-3 are attracted, the contacts K1-2 and K1-4 are disconnected, and the control loop power supply L, N is taken from the transformer TC1, namely a power supply loop;

when the first isolating switch keeps an opening state and the second isolating switch is switched from an opening state to a closing state, the transformer TC1 is powered off, the transformer TC2 is powered on, the coil of the relay K1 is powered off, the relay K1 keeps an opening state, the contacts K1-1 and K1-3 are disconnected, the contacts K1-2 and K1-4 are closed, and the control loop power supply L, N is taken from the transformer TC2, namely a power supply secondary loop;

when the first isolating switch is switched from an opening state to a closing state and the second isolating switch keeps the closing state, the transformer TC1 is electrified, the transformer TC2 is electrified, the coil of the relay K1 is electrified, the relay K1 is attracted, the contacts K1-1 and K1-3 are attracted, the contacts K1-2 and K1-4 are disconnected, and at the moment, the control loop power supply L, N automatically selects the transformer TC1, namely a power supply loop;

when the first isolating switch keeps a closing state and the second isolating switch is switched from an opening state to a closing state, the transformer TC1 is electrified, the transformer TC2 is electrified, the coil of the relay K1 is electrified, the relay K1 keeps attracting, the contacts K1-1 and K1-3 keep attracting, the contacts K1-2 and K1-4 keep disconnecting, and at the moment, the control loop power supply L, N automatically selects the transformer TC1, namely a power supply loop.

The automatic switching function of the control circuit can be realized by skillfully applying the normally open and normally closed contacts and adopting a contact type intermediate relay, the characteristics of the normally open and normally closed contacts during the action of the relay are fully utilized (the normally closed contact is firstly disconnected and the normally open contact is then closed during the actuation), the instantaneous switching is possibly performed, the switching time is reduced, the uninterruptibility of the power supply of the control circuit is kept, and the condition of the outgoing line and the short circuit of the control circuit is avoided.

The problem of the disconnected and connected isolator need artifical switching control power supply and switch power supply cause the undervoltage dropout of switch is solved, can be automatic according to the disconnected and connected condition automatic selection control power supply of isolator, when the power switching, because the time is very short, can ensure the normal power supply of switch, improved work efficiency.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an automatic switching circuit of mining flame-proof type multiloop vacuum electromagnetic starter control power, includes transformer TC1, transformer TC2, relay K1, miniature circuit breaker QF11, miniature circuit breaker QF21, fuse FU11, fuse FU12, fuse FU21 and fuse FU22, its characterized in that: the fuse FU11 and the fuse FU12 are connected between the first isolating switch and the primary side of the transformer TC1, and play a role in current limiting protection; the fuse FU21 and the fuse FU22 are connected between the second isolating switch and the primary side of the transformer TC2, and play a role in current limiting protection; the secondary side 220V wire of the transformer TC1 is connected with a miniature circuit breaker QF11, the lower port of the miniature circuit breaker QF11 and the secondary side 0V wire of the transformer TC1 are connected with the coil of the relay K1, and extend to form a passage with contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1; the secondary side 220V line of the transformer TC2 is connected with a miniature circuit breaker QF21, and the lower port of the miniature circuit breaker QF21, the secondary side 0V line of the transformer TC2 and contacts K1-1, K1-2, K1-3 and K1-4 of a relay K1 form a passage.

2. The mining flameproof multi-loop vacuum electromagnetic starter control power supply automatic switching circuit according to claim 1, characterized in that: the relay K1 is a contact intermediate relay.

3. The mining flameproof multi-loop vacuum electromagnetic starter control power supply automatic switching circuit according to claim 2, characterized in that: the contacts K1-1 and K1-3 are normally open contacts, and the contacts K1-2 and K1-4 are normally closed contacts.