CN216981596U

CN216981596U - Switching device

Info

Publication number: CN216981596U
Application number: CN202220025970.7U
Authority: CN
Inventors: 孙宁; 高有伦; 钱阳冬; 高浩岚; 王浩
Original assignee: Aerospace Yinshan Electric Co ltd
Current assignee: Aerospace Yinshan Electric Co ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-07-15
Anticipated expiration: 2032-01-05

Abstract

The utility model discloses a switching device which comprises a voltage monitoring module, a control module, a first breaker module, a second breaker module and a third breaker module. The voltage monitoring module is respectively connected with the first voltage end and the second voltage end; the control module is connected with the voltage monitoring module; the first circuit breaker module is respectively connected with the control module and the first voltage end; the second circuit breaker module is respectively connected with the control module and the first circuit breaker module; the third circuit breaker module is respectively connected with the control module, the second circuit breaker module and the second voltage end; the interlocking module is respectively connected with the first breaker module, the second breaker module, the third breaker module and the control module. The switching device disclosed by the utility model can improve the safety and reliability.

Description

Switching device

Technical Field

The utility model relates to the technical field of power equipment, in particular to a switching device.

Background

Continuous production in factories and enterprises has high requirements on continuous operation of power supplies. Currently, factories and enterprises generally use two power supplies to supply power to the power-using side, which are a common power supply and a standby power supply. The switching device is an automatic device for improving the power supply reliability, and can be switched to a standby power supply for supplying power after a common power supply is interrupted, so that the power-off of a power utilization side is avoided. At present, an existing switching device is provided with three circuit breakers, and the three circuit breakers can be switched on simultaneously, so that a common power supply and a standby power supply are in short circuit, an accident is caused, and therefore the existing switching device has certain potential safety hazards and is poor in safety.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a switching device which can improve safety.

The switching device comprises a voltage monitoring module, a control module, a first circuit breaker module, a second circuit breaker module, a third circuit breaker module and an interlocking module, wherein the voltage monitoring module is respectively connected with a first voltage end and a second voltage end; the control module is connected with the voltage monitoring module; the first circuit breaker module is respectively connected with the control module and the first voltage end; the second circuit breaker module is respectively connected with the control module and the first circuit breaker module; the third circuit breaker module is respectively connected with the control module, the second circuit breaker module and the second voltage end; the interlocking module is respectively connected with the first circuit breaker module, the second circuit breaker module, the third circuit breaker module and the control module.

The switching device according to the embodiment of the utility model at least has the following beneficial effects: the voltage monitoring module is used for detecting the voltage states of the first voltage end and the second voltage end; the control module is used for controlling the first circuit breaker module, the second circuit breaker module and the third circuit breaker module to perform opening and closing actions; the interlock module is used for preventing the first breaker module, the second breaker module and the third breaker module from being switched on simultaneously. First circuit breaker module, second circuit breaker module and third circuit breaker module carry out the divide-shut brake action under control module's control, and the interlocking module avoids first circuit breaker module, second circuit breaker module and third circuit breaker module to close a floodgate simultaneously, is favorable to improving the security.

According to some embodiments of the utility model, the interlock module comprises a first relay unit, a second relay unit and a third relay unit, the first relay unit, the second relay unit and the third relay unit are all connected with the first circuit breaker module, the second circuit breaker module, the third circuit breaker module and the control module, and the first relay unit is respectively connected with the second relay unit and the third relay unit, and the second relay unit is connected with the third relay unit. Realize interlocking through hardware, avoid first circuit breaker module, second circuit breaker module and third circuit breaker module to close a floodgate simultaneously, be favorable to improving reliability and security.

According to some embodiments of the utility model, the first relay unit comprises a first coil 1KA1, a first normally open switch 1KA2, a second normally open switch 1KA3, a first normally closed switch 1KA4 and a second normally closed switch 1KA 5; a first end of the first coil 1KA1 is connected with a switching-on indicating end of the first breaker module, and a second end of the first coil 1KA1 is connected with a fourth voltage end; a first end of the first normally open switch 1KA2 is connected with a fifth voltage end, a second end of the first normally open switch 1KA2 is connected with a second input end of the third relay unit, a first end of the first normally closed switch 1KA4 is connected with a second control end of the control module, and a second end of the first normally closed switch 1KA4 is connected with a closing input end of the second breaker module; the first end and the third voltage end of second normally open switch 1KA3 are connected, the second end of second normally open switch 1KA3 with the third input of second relay unit is connected, the first end of second normally closed switch 1KA5 with control module's third control end is connected, the second end of second normally closed switch 1KA5 with the combined floodgate input of third circuit breaker module is connected. Through the setting of first relay unit, be favorable to simplifying interlocking module, improve the reliability.

According to some embodiments of the utility model, the second relay unit comprises a second coil 2KA1, a first normally open switch 2KA2, a second normally open switch 2KA3, a first normally closed switch 2KA4 and a second normally closed switch 2KA 5; a first end of the second coil 2KA1 is connected with a switching-on indication end of the second breaker module, and a second end of the second coil 2KA1 is connected with a sixth voltage end; a first end of the first normally open switch 2KA2 is connected with a third voltage end, a second end of the first normally open switch 2KA2 is connected with a first input end of the third relay unit, a first end of the first normally closed switch 2KA4 is connected with a first control end of the control module, and a second end of the first normally closed switch 2KA4 is connected with a closing input end of the first breaker module; the first end of second normally open switch 2KA3 with the third output of first relay unit is connected, the second of second normally open switch 2KA3 end with the separating brake input of third circuit breaker module is connected, the first end of second normally closed switch 2KA5 with control module's third control end is connected, the second end of second normally closed switch 2KA5 with the combined floodgate input of third circuit breaker module is connected. Through the setting of second relay unit, be favorable to simplifying interlocking module, improve the reliability.

According to some embodiments of the present invention, the third relay unit includes a third coil 3KA1, a first normally open switch 3KA2, a second normally open switch 3KA3, a first normally closed switch 3KA4, and a second normally closed switch 3KA 5; a first end of the third coil 3KA1 is connected with a closing indication end of the third breaker module, and a second end of the third coil 3KA1 is connected with a fourth voltage end; a first end of the first normally open switch 3KA2 is connected with a first output end of the second relay unit, a second end of the first normally open switch 3KA2 is connected with a tripping input end of the first circuit breaker module, a first end of the first normally closed switch 3KA4 is connected with a first control end of the control module, and a second end of the first normally closed switch 3KA4 is connected with a switching-on input end of the first circuit breaker module; the first end of second normally open switch 3KA3 with the second output of first relay unit is connected, the second end of second normally open switch 3KA3 with the separating brake input of second circuit breaker module is connected, the first end of second normally closed switch 3KA5 with control module's second control end is connected, the second end of second normally closed switch 3KA5 with the combined floodgate input of second circuit breaker module is connected. Through the setting of third relay unit, be favorable to simplifying interlocking module, improve the reliability.

According to some embodiments of the present invention, the power supply further includes a first power supply switching module, and the first power supply switching module is respectively connected to the first voltage terminal, the second voltage terminal, the seventh voltage terminal, the eighth voltage terminal, and the interlock module, so as to take power.

According to some embodiments of the utility model, the first power switching module comprises a fourth relay unit comprising a fourth coil 4KA1, a first normally open switch 4KA2, a second normally open switch 4KA3, a first normally closed switch 4KA4 and a second normally closed switch 4KA 5; a first end of the fourth coil 4KA1 is connected to the second voltage terminal, and a second end of the fourth coil 4KA1 is connected to the eighth voltage terminal; a first end of the first normally open switch 4KA2 is connected to the second voltage end, a second end of the first normally open switch 4KA2 is connected to a first end of the first normally closed switch 4KA4 and a first input end of the interlock module, and a second end of the first normally closed switch 4KA4 is connected to the first voltage end; the first end of second normally open switch 4KA3 with the eighth voltage end is connected, the second end of second normally open switch 4KA3 with the first end of second normally closed switch 4KA5 the first output of interlocking module is connected, the second end of second normally closed switch 4KA5 with the seventh voltage end is connected. Through the setting of first power switching module, be favorable to simplifying circuit structure, improve circuit reliability.

According to some embodiments of the present invention, the power supply further includes a second power supply switching module, and the second power supply switching module is respectively connected to the interlocking module, the first circuit breaker module, the third circuit breaker module, the seventh voltage terminal, and the eighth voltage terminal, so as to take power.

According to some embodiments of the utility model, the second power switching module comprises a fifth relay unit comprising a fifth coil 5KA1, a first normally open switch 5KA2, a second normally open switch 5KA3 and a first normally closed switch 5KA4, and a sixth relay unit comprising a sixth coil 6KA1, a first normally open switch 6KA2, a second normally open switch 6KA3 and a first normally closed switch 6KA 4; the output end of the third circuit breaker module, the first normally closed switch 5KA4, the sixth coil 6KA1 and the eighth voltage end are connected in sequence, and the output end of the first circuit breaker module, the first normally closed switch 6KA4, the fifth coil 5KA1 and the seventh voltage end are connected in sequence; a first end of the first normally open switch 5KA2 is connected with an output end of the first breaker module, a first end of the first normally open switch 6KA2 is connected with an output end of the third breaker module, and a second end of the first normally open switch 5KA2 and a second end of the first normally open switch 6KA2 are both connected with a second input end of the interlocking module; the first end of second normally open switch 5KA3 with the seventh voltage end is connected, the first end of second normally open switch 6KA3 with the eighth voltage end is connected, the second end of second normally open switch 5KA3 with the second end of second normally open switch 6KA3 all with the second output of interlocking module is connected. Through the setting of fifth relay unit and sixth relay unit to get the electricity.

According to some embodiments of the utility model, the control module further comprises a switch connected to the first circuit breaker module, the second circuit breaker module, the third circuit breaker module, the fifth voltage terminal, the third circuit breaker module, and the fourth circuit breaker module, respectively, for facilitating switching of functions.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a circuit block diagram of a switching device according to an embodiment of the present invention;

fig. 2 is one of the electrical control schematics of the switching device shown in fig. 1;

FIG. 3 is a second schematic diagram of electrical control of the switching device shown in FIG. 1;

fig. 4 is a third schematic diagram of the electrical control of the switching device shown in fig. 1;

FIG. 5 is a fourth schematic diagram of the electrical control of the switching device shown in FIG. 1;

fig. 6 is a fifth schematic diagram of the electrical control of the switching device shown in fig. 1;

FIG. 7 is a circuit schematic of an interlock module of some embodiments of the present invention;

FIG. 8 is one of the electrical schematic diagrams of the interlock module of the switching device shown in FIG. 1;

FIG. 9 is a second schematic circuit diagram of an interlock module of the switching device of FIG. 1;

fig. 10 is a third schematic circuit diagram of an interlock module of the switching device shown in fig. 1.

The reference numbers are as follows:

the system comprises a voltage monitoring module 100, a control module 200, a first circuit breaker module 300, a second circuit breaker module 400, a third circuit breaker module 500, an interlocking module 600, a first relay unit 610, a second relay unit 620, a third relay unit 630, a first power switching module 700, and a second power switching module 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If there is a description of the first, second, third, fourth, fifth, sixth, seventh, eighth features for the purpose of distinguishing between features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of features indicated or to implicitly indicate the precedence of the features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 and 2, a switching device includes a voltage monitoring module 100, a control module 200, a first circuit breaker module 300, a second circuit breaker module 400, and a third circuit breaker module 500. The voltage monitoring module 100 is respectively connected with the first voltage end and the second voltage end; the control module 200 is connected with the voltage monitoring module 100; the first circuit breaker module 300 is connected with the control module 200 and the first voltage terminal respectively; the second breaker module 400 is connected to the control module 200 and the first breaker module 300, respectively; the third breaker module 500 is connected to the control module 200, the second breaker module 400, and the second voltage terminal, respectively; the interlock module 600 is connected to the first circuit breaker module 300, the second circuit breaker module 400, the third circuit breaker module 500, and the control module 200, respectively.

Specifically, a first input terminal of the voltage monitoring module 100 is connected to a first voltage terminal, a second input terminal of the voltage monitoring module 100 is connected to a second voltage terminal, the first input terminal of the voltage monitoring module 100 is connected to a first voltage detection input terminal of the control module 200, and a second output terminal of the voltage monitoring module 100 is connected to a second voltage detection input terminal of the control module 200. The first voltage end, the switch QF1 of the first breaker module 300, the switch QF2 of the second breaker module 400, the switch QF3 of the third breaker module 500, and the second voltage end are sequentially connected, the fourth control end of the control module 200 is connected with the opening input end of the first breaker module 300, the fifth control end of the control module 200 is connected with the opening input end of the second breaker module 400, and the sixth control end of the control module 200 is connected with the opening input end of the third breaker module 500.

Interlocking module 600 is used for realizing the interlocking function, in first circuit breaker module 300, second circuit breaker module 400 and third circuit breaker module 500, when arbitrary two circuit breaker modules combined floodgate, forbids the third circuit breaker module to combine floodgate, promptly, avoids three circuit breaker modules to combine floodgate simultaneously, is favorable to improving security and reliability.

For example, when both the first and

second breaker modules

300 and 400 are closed, the third breaker module 500 is prohibited from closing; or, when both the first breaker module 300 and the third breaker module 500 are switched on, the second breaker module 400 is prohibited from being switched on; or, when both the second breaker module 400 and the third breaker module 500 are turned on, the first breaker module 300 is prohibited from being turned on.

In addition, referring to fig. 3, a first closing state port of the control module 200 is connected to a closing state output terminal of the first circuit breaker module 300, a second closing state port of the control module 200 is connected to a closing state output terminal of the second circuit breaker module 400, and a third closing state port of the control module 200 is connected to a closing state output terminal of the third circuit breaker module 500, so that the control module 200 acquires closing states of the three circuit breaker modules, so as to control the circuit breaker modules to open or close.

In addition, referring to fig. 3, a first fault state port of the control module 200 is connected to a fault state output terminal of the first circuit breaker module 300, a second fault state port of the control module 200 is connected to a fault state output terminal of the second circuit breaker module 400, and a third fault state port of the control module 200 is connected to a fault state output terminal of the third circuit breaker module 500, so that the control module 200 acquires fault states of the three circuit breaker modules, so as to control the circuit breaker modules to open or close.

It should be noted that the first voltage terminal may be a power supply terminal of a common power supply, and the second voltage terminal may be a power supply terminal of a standby power supply. In addition, both the common power supply and the backup power supply may be mains power.

The switching-on means that the switch is closed, and the switching-off means that the switch is opened. For example, the first breaker module 300 is closed, which means that the switch QF1 of the first breaker module 300 is closed; the opening of the first circuit breaker module 300 means that the switch QF1 of the first circuit breaker module 300 is opened.

It should be noted that, referring to fig. 3, control module 200 is provided with relay 7KA, relay 8KA, relay 9KA, relay 10KA, relay 11KA and relay 12KA, and relay 7KA and relay 8KA are used for controlling first circuit breaker module 300 to close a gate or open a gate, and relay 9KA and relay 10KA are used for controlling second circuit breaker module 400 to close a gate or open a gate, and relay 11KA and relay 12KA are used for controlling third circuit breaker module 500 to close a gate or open a gate.

For example, when the coil 7KA1 of the relay 7KA is energized, the normally open switch 7KA2 of the relay 7KA is closed, so that the first breaker module 300 is closed; or when the coil 8KA1 of the relay 8KA is energized, the normally open switch 8KA2 of the relay 8KA is closed, so that the first breaker module 300 is opened; or when the coil 9KA1 of the relay 9KA is energized, the normally open switch 9KA2 of the relay 9KA is closed, so that the second breaker module 400 is switched on; or, when the coil 10KA1 of the relay 10KA is energized, the normally open switch 10KA2 of the relay 10KA is closed, so that the second breaker module 400 is opened; or when the coil 11KA1 of the relay 11KA is energized, the normally open switch 11KA2 of the relay 11KA is closed, so that the first breaker module 300 is switched on; alternatively, when the coil 12KA1 of the relay 12KA is energized, the normally open switch 12KA2 of the relay 12KA is closed, so that the first breaker module 300 is opened.

In addition, one end of the normally open switch 7KA2 of the relay 7KA serves as a first control end of the control module 200, one end of the normally open switch 9KA2 of the relay 9KA serves as a second control end of the control module 200, and one end of the normally open switch 11KA2 of the relay 11KA serves as a third control end of the control module 200.

In some embodiments, referring to fig. 7, the interlock module 600 includes an and gate AG1, an and gate AG2, an and gate AG3, a relay 13KA, a relay 14KA, and a relay 15KA, a first input of the and gate AG2 and a first input of the and gate AG3 are both connected to a closing indication terminal of the first breaker module 300, a first input of the and gate AG1 and a second input of the and gate AG3 are both connected to a closing indication terminal of the second breaker module 400, a second input of the and gate AG1 and a second input of the and gate AG2 are both connected to a closing indication terminal of the third breaker module 500, an output of the and gate AG1 is connected to a tripping input of the first breaker module 300, an output of the and gate AG2 is connected to a tripping input of the second breaker module 400, and an output of the and gate 3 is connected to a tripping input of the third breaker module 500.

A coil 13KA1 of the relay 13KA is connected in series between a closing indication end and a fourth voltage end of the first breaker module 300, a first normally closed switch 13KA2 of the relay 13KA is connected in series between a second control end of the control module 200 and a closing input end of the second breaker module 400, and a second normally closed switch 13KA3 of the relay 13KA is connected in series between a third control end of the control module 200 and a closing input end of the third breaker module 500; a coil 14KA1 of the relay 14KA is connected in series between a closing indication end and a sixth voltage end of the second circuit breaker module 400, a first normally closed switch 14KA2 of the relay 14KA is connected in series between a first control end of the control module 200 and a closing input end of the first circuit breaker module 300, and a second normally closed switch 14KA3 of the relay 14KA is connected in series between a third control end of the control module 200 and a closing input end of the third circuit breaker module 500; a coil 15KA1 of the relay 15KA is connected in series between the closing indication end and the fourth voltage end of the third breaker module 500, a first normally closed switch 15KA2 of the relay 15KA is connected in series between the first control end of the control module 200 and the closing input end of the first breaker module 300, and a second normally closed switch 15KA3 of the relay 15KA is connected in series between the second control end of the control module 200 and the closing input end of the second breaker module 400.

Through mutually supporting of AND gate AG1, AND gate AG2, AND gate AG3, relay 13KA, relay 14KA and relay 15KA, can avoid three breaker module to close a floodgate simultaneously, be favorable to improving security and reliability.

Further, referring to fig. 8 to 10, in the present embodiment, the interlock module 600 includes a first relay unit 610, a second relay unit 620, and a third relay unit 630, the first relay unit 610, the second relay unit 620, and the third relay unit 630 are all connected to the first circuit breaker module 300, the second circuit breaker module 400, the third circuit breaker module 500, and the control module 200, and the first relay unit 610 is connected to the second relay unit 620 and the third relay unit 630, and the second relay unit 620 is connected to the third relay unit 630.

The first relay unit 610 is connected to the first circuit breaker module 300, the second circuit breaker module 400, the third circuit breaker module 500, and the control module 200, respectively; the second relay unit 620 is connected to the first circuit breaker module 300, the second circuit breaker module 400, the third circuit breaker module 500, and the control module 200, respectively; the third relay unit 630 is connected to the first circuit breaker module 300, the second circuit breaker module 400, the third circuit breaker module 500, and the control module 200, respectively. The first relay unit 610 and the second relay unit 620 cooperate to keep the third breaker module 500 open when the first breaker module 300 and the second breaker module 400 are closed; the first relay unit 610 and the third relay unit 630 cooperate to keep the second breaker module 400 open when the first breaker module 300 and the third breaker module 500 are closed; the second relay unit 620 and the third relay unit 630 cooperate to keep the first breaker module 300 open when the second breaker module 400 and the third breaker module 500 are closed.

Mutually cooperate through first relay unit 610, second relay unit 620 and third relay unit 630 to avoid first circuit breaker module 300, second circuit breaker module 400 and third circuit breaker module 500 to close a floodgate simultaneously, be favorable to improving the security, and, realize the interlocking function through hardware, be favorable to improving the reliability.

Referring to fig. 4 to 6, and fig. 8, the first relay unit 610 includes a first coil 1KA1, a first normally open switch 1KA2, a second normally open switch 1KA3, a first normally closed switch 1KA4, and a second normally closed switch 1KA 5; a first end of the first coil 1KA1 is connected to a closing indication end of the first breaker module 300, and a second end of the first coil 1KA1 is connected to a fourth voltage end; a first end of the first normally-open switch 1KA2 is connected with the fifth voltage end, a second end of the first normally-open switch 1KA2 is connected with a second input end of the third relay unit 630, a first end of the first normally-closed switch 1KA4 is connected with a second control end of the control module 200, and a second end of the first normally-closed switch 1KA4 is connected with a closing input end of the second circuit breaker module 400; the first end and the third voltage end of second normally open switch 1KA3 are connected, and the second end and the third input of second relay unit 620 of second normally open switch 1KA3 are connected, and the first end and the third control end of control module 200 of second normally closed switch 1KA5 are connected, and the second end and the combined floodgate input of third circuit breaker module 500 of second normally closed switch 1KA5 are connected.

When the first coil 1KA1 is energized, the first normally-open switch 1KA2 and the second normally-open switch 1KA3 are closed at the same time, and the first normally-closed switch 1KA4 and the second normally-closed switch 1KA5 are separated at the same time; when the first coil 1KA1 is not energized, the first normally-open switch 1KA2 and the second normally-open switch 1KA3 are simultaneously separated, and the first normally-closed switch 1KA4 and the second normally-closed switch 1KA5 are simultaneously closed.

It should be noted that the third voltage terminal is used for supplying power, and the fourth voltage terminal is used for grounding.

Referring to fig. 4 to 6, and fig. 9, the second relay unit 620 includes a second coil 2KA1, a first normally open switch 2KA2, a second normally open switch 2KA3, a first normally closed switch 2KA4, and a second normally closed switch 2KA 5; a first end of the second coil 2KA1 is connected with a switching-on indication end of the second breaker module 400, and a second end of the second coil 2KA1 is connected with a sixth voltage end; a first end of the first normally open switch 2KA2 is connected with the third voltage end, a second end of the first normally open switch 2KA2 is connected with a first input end of the third relay unit 630, a first end of the first normally closed switch 2KA4 is connected with a first control end of the control module 200, and a second end of the first normally closed switch 2KA4 is connected with a closing input end of the first circuit breaker module 300; the first end of the second normally open switch 2KA3 is connected with the third output end of the first relay unit 610, the second end of the second normally open switch 2KA3 is connected with the opening input end of the third breaker module 500, the first end of the second normally closed switch 2KA5 is connected with the third control end of the control module 200, and the second end of the second normally closed switch 2KA5 is connected with the closing input end of the third breaker module 500.

When the second coil 2KA1 is energized, the first normally-open switch 2KA2 and the second normally-open switch 2KA3 are closed at the same time, and the first normally-closed switch 2KA4 and the second normally-closed switch 2KA5 are separated at the same time; when the second coil 2KA1 is not energized, the first normally-open switch 2KA2 and the second normally-open switch 2KA3 are separated at the same time, and the first normally-closed switch 2KA4 and the second normally-closed switch 2KA5 are closed at the same time.

It should be noted that the fifth voltage terminal is used for power supply, and the sixth voltage terminal is used for grounding.

Referring to fig. 4 to 6, and fig. 10, the third relay unit 630 includes a third coil 3KA1, a first normally open switch 3KA2, a second normally open switch 3KA3, a first normally closed switch 3KA4, and a second normally closed switch 3KA 5; a first end of the third coil 3KA1 is connected to a closing indication end of the third breaker module 500, and a second end of the third coil 3KA1 is connected to a fourth voltage end; a first end of the first normally open switch 3KA2 is connected with a first output end of the second relay unit 620, a second end of the first normally open switch 3KA2 is connected with a tripping input end of the first breaker module 300, a first end of the first normally closed switch 3KA4 is connected with a first control end of the control module 200, and a second end of the first normally closed switch 3KA4 is connected with a closing input end of the first breaker module 300; the first end of second normally open switch 3KA3 is connected with the second output of first relay unit 610, and the second end of second normally open switch 3KA3 is connected with the separating brake input of second circuit breaker module 400, and the first end of second normally closed switch 3KA5 is connected with the second control end of control module 200, and the second end of second normally closed switch 3KA5 is connected with the combined floodgate input of second circuit breaker module 400.

When the third coil 3KA1 is energized, the first normally-open switch 3KA2 and the second normally-open switch 3KA3 are closed at the same time, and the first normally-closed switch 3KA4 and the second normally-closed switch 3KA5 are separated at the same time; when the third coil 3KA1 is not energized, the first normally-open switch 3KA2 and the second normally-open switch 3KA3 are simultaneously separated, and the first normally-closed switch 3KA4 and the second normally-closed switch 3KA5 are simultaneously closed.

Through first coil 1KA1, first normally open switch 1KA2, second normally open switch 1KA3, first normally closed switch 1KA4, second normally closed switch 1KA5, second coil 2KA1, first normally open switch 2KA2, second normally open switch 2KA3, first normally closed switch 2KA4, second normally closed switch 2KA5, third coil 3KA1, first normally open switch 3KA2, second normally open switch 3KA3, mutually supporting of first normally closed switch 3KA4 and second normally closed switch 3KA5, in order to avoid three circuit breaker module to close the floodgate simultaneously, be favorable to improving security and reliability.

Referring to fig. 2, the switching device further includes a first power switching module 700, and the first power switching module 700 is respectively connected to the first voltage terminal, the second voltage terminal, the seventh voltage terminal, the eighth voltage terminal, and the interlocking module 600. The first power switching module 700 is used for power switching, that is, power is supplied from the first voltage terminal to the second voltage terminal, or power is supplied from the second voltage terminal to the first voltage terminal. The seventh voltage terminal and the eighth voltage terminal are used for grounding. Through the first power switching module 700, the interlock module 600 can take power through the first voltage terminal or the second voltage terminal, and an external power supply is not required, thereby facilitating simplification of a circuit structure.

Specifically, the first power switching module 700 includes a fourth relay unit including a fourth coil 4KA1, a first normally open switch 4KA2, a second normally open switch 4KA3, a first normally closed switch 4KA4, and a second normally closed switch 4KA 5; a first end of the fourth coil 4KA1 is connected with the second voltage terminal, and a second end of the fourth coil 4KA1 is connected with the eighth voltage terminal; the first end of the first normally-open switch 4KA2 is connected with the second voltage end, the second end of the first normally-open switch 4KA2 is connected with the first end of the first normally-closed switch 4KA4 and the first input end of the interlocking module 600, and the second end of the first normally-closed switch 4KA4 is connected with the first voltage end; the first end and the eighth voltage end of second normally open switch 4KA3 are connected, the second end and the first end of second normally closed switch 4KA5, the first output of interlocking module 600 of second normally open switch 4KA3 are connected, the second end and the seventh voltage end of second normally closed switch 4KA5 are connected.

In addition, the first power switching module 700 may be connected to the first, second, and third

circuit breaker modules

300, 400, and 500 to supply power. Additionally, in some embodiments, the first power switching module 700 is also connected to the first and third

circuit breaker modules

300, 500, while the second circuit breaker module 400 is connected to the second power switching module 800 described below.

It should be noted that the second end of the first normally-open switch 4KA2 and the first end of the first normally-closed switch 4KA4 are used as a third voltage end together, and the second end of the second normally-open switch 4KA3 and the first end of the second normally-closed switch 4KA5 are used as a fourth voltage end together.

It should be noted that, in the above embodiment, the first end of the second normally open switch 1KA3 of the first relay unit 610 and the first end of the first normally open switch 2KA2 of the second relay unit 620 are used together as the first input end of the interlock module 600; the second end of the first coil 1KA1 of the first relay unit 610 and the second end of the third coil 3KA1 of the third relay unit 630 collectively serve as a first output terminal of the interlock module 600.

Referring to fig. 5, the switching device further includes a second power switching module 800, and the second power switching module 800 is connected to the interlocking module 600, the first breaker module 300, the third breaker module 500, the seventh voltage terminal, and the eighth voltage terminal, respectively. The second power switching module 800 is configured to switch a power supply end, that is, to supply power through the first breaker module 300 and to supply power through the third breaker module 500; or by the third breaker module 500 to the first breaker module 300. Through second power switching module 800, make interlock module 600 get the electricity through first circuit breaker module 300 or third circuit breaker module 500, be favorable to simplifying circuit structure.

Specifically, the second power switching module 800 includes a fifth relay unit and a sixth relay unit, the fifth relay unit includes a fifth coil 5KA1, a first normally-open switch 5KA2, a second normally-open switch 5KA3, and a first normally-closed switch 5KA4, the sixth relay unit includes a sixth coil 6KA1, a first normally-open switch 6KA2, a second normally-open switch 6KA3, and a first normally-closed switch 6KA 4; the output end of the third breaker module 500, the first normally-closed switch 5KA4, the sixth coil 6KA1 and the eighth voltage end are connected in sequence, and the output end of the first breaker module 300, the first normally-closed switch 6KA4, the fifth coil 5KA1 and the seventh voltage end are connected in sequence; a first end of the first normally open switch 5KA2 is connected with an output end of the first breaker module 300, a first end of the first normally open switch 6KA2 is connected with an output end of the third breaker module 500, and a second end of the first normally open switch 5KA2 and a second end of the first normally open switch 6KA2 are both connected with a second input end of the interlocking module 600; the first end and the seventh voltage end of second normally open switch 5KA3 are connected, and the first end and the eighth voltage end of second normally open switch 6KA3 are connected, and the second end of second normally open switch 5KA3 and the second end of second normally open switch 6KA3 all are connected with the second output of interlocking module 600.

Through the cooperation of fifth relay unit and sixth relay unit each other, realize the switching of power supply end, be favorable to simplifying circuit structure. For example, when the first circuit breaker module 300 is tripped, the second input of the interlock module 600 takes power through the third circuit breaker module 500; alternatively, when the third circuit breaker module 500 is tripped, the second input of the interlock module 600 takes power through the first circuit breaker module 300.

It should be noted that the second end of the first normally open switch 5KA2 and the second end of the first normally open switch 6KA2 are commonly used as a fifth voltage end, and the second end of the second normally open switch 5KA3 and the second end of the second normally open switch 6KA3 are commonly used as a sixth voltage end.

It should be noted that, a first terminal of the switch QF1 of the first circuit breaker module 300 is connected to the first voltage terminal, and a second terminal of the switch QF1 of the first circuit breaker module 300 is used as an output terminal of the first circuit breaker module 300; a first terminal of the switch QF3 of the third breaker module 500 is connected with the second voltage terminal and a second terminal of the switch QF3 of the third breaker module 500 serves as an output terminal of the third breaker module 500.

Referring to fig. 3 to 6, the switching device further includes a transfer switch connected to the control module 200, the third voltage terminal, the fifth voltage terminal, the first breaker module 300, the second breaker module 400, and the third breaker module 500. The change-over switch comprises a switch SA1, a switch SA2, a switch SA3 and a switch SA4, the switch SA1 is connected with the control module 200, a third voltage end, a switch SA2 and the first breaker module 300 are sequentially connected, a fifth voltage end, the switch SA3 and the second breaker module 400 are sequentially connected, and the third voltage end, the switch SA4 and the third breaker module 500 are sequentially connected. The change-over switch is used for realizing the switching of functions, such as the switching of a self-input self-recovery function, a self-input non-self-recovery function and a manual control function, so that the corresponding functions can be selected according to actual requirements, and convenience is improved.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A switching device, comprising:

the voltage monitoring module is respectively connected with the first voltage end and the second voltage end;

the control module is connected with the voltage monitoring module;

the first breaker module is respectively connected with the control module and the first voltage end;

the second circuit breaker module is respectively connected with the control module and the first circuit breaker module;

a third circuit breaker module connected to the control module, the second circuit breaker module, and the second voltage terminal, respectively;

and the interlocking module is respectively connected with the first circuit breaker module, the second circuit breaker module, the third circuit breaker module and the control module.

2. The switching device according to claim 1, wherein the interlock module comprises a first relay unit, a second relay unit and a third relay unit, the first relay unit, the second relay unit and the third relay unit are all connected with the first circuit breaker module, the second circuit breaker module, the third circuit breaker module and the control module, and the first relay unit is respectively connected with the second relay unit and the third relay unit, and the second relay unit is connected with the third relay unit.

3. The switching device according to claim 2, wherein the first relay unit comprises a first coil 1KA1, a first normally open switch 1KA2, a second normally open switch 1KA3, a first normally closed switch 1KA4 and a second normally closed switch 1KA 5;

a first end of the first coil 1KA1 is connected with a switching-on indication end of the first breaker module, and a second end of the first coil 1KA1 is connected with a fourth voltage end;

a first end of the first normally open switch 1KA2 is connected with a fifth voltage end, a second end of the first normally open switch 1KA2 is connected with a second input end of the third relay unit, a first end of the first normally closed switch 1KA4 is connected with a second control end of the control module, and a second end of the first normally closed switch 1KA4 is connected with a closing input end of the second breaker module;

the first end and the third voltage end of second normally open switch 1KA3 are connected, the second end of second normally open switch 1KA3 with the third input of second relay unit is connected, the first end of second normally closed switch 1KA5 with control module's third control end is connected, the second end of second normally closed switch 1KA5 with the combined floodgate input of third circuit breaker module is connected.

4. The switching device according to claim 2, wherein the second relay unit comprises a second coil 2KA1, a first normally open switch 2KA2, a second normally open switch 2KA3, a first normally closed switch 2KA4 and a second normally closed switch 2KA 5;

a first end of the second coil 2KA1 is connected with a switching-on indication end of the second breaker module, and a second end of the second coil 2KA1 is connected with a sixth voltage end;

a first end of the first normally open switch 2KA2 is connected with a third voltage end, a second end of the first normally open switch 2KA2 is connected with a first input end of the third relay unit, a first end of the first normally closed switch 2KA4 is connected with a first control end of the control module, and a second end of the first normally closed switch 2KA4 is connected with a closing input end of the first breaker module;

the first end of second normally open switch 2KA3 with the third output of first relay unit is connected, the second of second normally open switch 2KA3 end with the separating brake input of third circuit breaker module is connected, the first end of second normally closed switch 2KA5 with control module's third control end is connected, the second end of second normally closed switch 2KA5 with the combined floodgate input of third circuit breaker module is connected.

5. The switching device according to claim 2, wherein the third relay unit comprises a third coil 3KA1, a first normally open switch 3KA2, a second normally open switch 3KA3, a first normally closed switch 3KA4 and a second normally closed switch 3KA 5;

a first end of the third coil 3KA1 is connected with a closing indication end of the third breaker module, and a second end of the third coil 3KA1 is connected with a fourth voltage end;

the first end of the first normally-open switch 3KA2 is connected with the first output end of the second relay unit, the second end of the first normally-open switch 3KA2 is connected with the opening input end of the first circuit breaker module, the first end of the first normally-closed switch 3KA4 is connected with the first control end of the control module, and the second end of the first normally-closed switch 3KA4 is connected with the closing input end of the first circuit breaker module;

the first end of second normally open switch 3KA3 with the second output of first relay unit is connected, the second end of second normally open switch 3KA3 with the separating brake input of second circuit breaker module is connected, the first end of second normally closed switch 3KA5 with control module's second control end is connected, the second end of second normally closed switch 3KA5 with the combined floodgate input of second circuit breaker module is connected.

6. The switching device according to claim 1, further comprising a first power switching module, wherein the first power switching module is connected to the first voltage terminal, the second voltage terminal, the seventh voltage terminal, the eighth voltage terminal, and the interlock module, respectively.

7. The switching device of claim 6, wherein the first power switching module comprises a fourth relay unit comprising a fourth coil 4KA1, a first normally open switch 4KA2, a second normally open switch 4KA3, a first normally closed switch 4KA4 and a second normally closed switch 4KA 5;

a first end of the fourth coil 4KA1 is connected to the second voltage terminal, and a second end of the fourth coil 4KA1 is connected to the eighth voltage terminal;

a first end of the first normally open switch 4KA2 is connected to the second voltage end, a second end of the first normally open switch 4KA2 is connected to a first end of the first normally closed switch 4KA4 and a first input end of the interlock module, and a second end of the first normally closed switch 4KA4 is connected to the first voltage end;

the first end of second normally open switch 4KA3 with the eighth voltage end is connected, the second end of second normally open switch 4KA3 with the first end of second normally closed switch 4KA5 the first output of interlocking module is connected, the second end of second normally closed switch 4KA5 with the seventh voltage end is connected.

8. The switching device according to claim 1, further comprising a second power switching module connected to the interlock module, the first circuit breaker module, the third circuit breaker module, a seventh voltage terminal, and an eighth voltage terminal, respectively.

9. The switching device according to claim 8, wherein the second power switching module comprises a fifth relay unit and a sixth relay unit, the fifth relay unit comprising a fifth coil 5KA1, a first normally open switch 5KA2, a second normally open switch 5KA3 and a first normally closed switch 5KA4, the sixth relay unit comprising a sixth coil 6KA1, a first normally open switch 6KA2, a second normally open switch 6KA3 and a first normally closed switch 6KA 4;

the output end of the third breaker module, the first normally-closed switch 5KA4, the sixth coil 6KA1 and the eighth voltage end are connected in sequence, and the output end of the first breaker module, the first normally-closed switch 6KA4, the fifth coil 5KA1 and the seventh voltage end are connected in sequence;

a first end of the first normally open switch 5KA2 is connected with an output end of the first breaker module, a first end of the first normally open switch 6KA2 is connected with an output end of the third breaker module, and a second end of the first normally open switch 5KA2 and a second end of the first normally open switch 6KA2 are both connected with a second input end of the interlocking module;

the first end of second normally open switch 5KA3 with the seventh voltage end is connected, the first end of second normally open switch 6KA3 with the eighth voltage end is connected, the second end of second normally open switch 5KA3 with the second end of second normally open switch 6KA3 all with the second output of interlocking module is connected.

10. The switching device according to claim 1, further comprising a diverter switch connected to the control module, a third voltage terminal, a fifth voltage terminal, the first circuit breaker module, the second circuit breaker module and the third circuit breaker module, respectively.