CN216721011U

CN216721011U - Dual-power automatic switcher with primary and secondary fusion

Info

Publication number: CN216721011U
Application number: CN202123451271.3U
Authority: CN
Inventors: 李容; 李辉
Original assignee: Zhuhai Nanrui Smart Grid Co ltd
Current assignee: Zhuhai Nanrui Smart Grid Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-10
Anticipated expiration: 2031-12-31

Abstract

The application discloses a double-power automatic switcher with one and two integrated power supplies, which belongs to the technical field of power supply, and is characterized in that two relays which are mutually independent are arranged, and the contact connection relations between the two relays and two paths of power supplies are set, so that when the switcher is in work, under the condition that the common power supply normally supplies power, the common power supply can be cut off by the common power supply through the second relay, under the condition that the standby power supply supplies power, the common power supply can be cut off by the first relay through the standby power supply, the two relays can be interlocked, only one path of power supply output can be limited, therefore, even if armature in the relay shakes or two armatures cannot be simultaneously switched to the same path of power supply due to mechanical failure in the relay, the two paths of power supplies cannot be connected together, the short circuit phenomenon cannot occur, the reliability is high, the safety performance is high, in addition, the two relays can also form double-contact isolation, the withstand voltage value is increased, and larger current can flow through the relays.

Description

Dual-power automatic switcher with primary and secondary fusion

Technical Field

The utility model belongs to the technical field of power supply, and particularly relates to a primary-secondary fusion dual-power automatic switcher.

Background

The double-power automatic switcher is suitable for switching two power supplies (a common power supply and a standby power supply) with rated voltage of no more than 1000v and direct current of no more than 1500v between power supplies due to the abnormity of one power supply, ensures the safety and reliability of power supply in time, and is particularly suitable for important continuous power generation departments such as post and telecommunications, banks, hospitals, fire hotels, high-rise buildings, industrial production lines, television stations and the like. However, the existing dual-power automatic switcher generally switches back and forth between two paths of power supplies through only one relay, if two armatures in the relay shake in the switching process or the two armatures cannot be switched to the same path of power supply in the same direction due to internal mechanical faults, the two paths of power supplies can be connected together to cause a short circuit phenomenon, a fire accident can occur in the serious case, and the safety and the reliability are low.

SUMMERY OF THE UTILITY MODEL

Objects of the utility model

In order to overcome the defects, the utility model aims to provide a primary-secondary fusion dual-power automatic switcher, which aims to solve the technical problem that the conventional dual-power automatic switcher is easy to cause the mutual connection of two paths of power supplies and the occurrence of short-circuit accidents because the two paths of power supplies are switched by only one relay.

(II) technical scheme

In order to achieve the purpose, the technical scheme provided by the application is as follows:

a dual-power automatic switcher with secondary fusion comprises: the power supply system comprises a shell, a first power supply loop, a second power supply loop, a load loop, a first relay and a second relay, wherein the first power supply loop, the second power supply loop, the load loop, the first relay and the second relay are arranged in the shell, the input end of the first power supply loop is connected with a common power supply, the output end of the first power supply loop is connected with a normally closed contact of the first relay, the input end of the load loop is connected with a common end of the first relay, the output end of the load loop is connected with a load, the input end of the second power supply loop is connected with a standby power supply, the output end of the second power supply loop is connected with a normally closed contact of the second relay, the control end of the second relay is connected with the input end of the first power supply loop, and the common end of the second relay is connected with the control end of the first relay and the normally open contact;

the application sets the contact connection relations between the two relays and the two paths of power supplies by arranging the two relays which are independent from each other, so that when the device works, under the condition that the common power supply normally supplies power, the common power supply can cut off the standby power supply through the second relay, under the condition that the standby power supply supplies power, the standby power supply can cut off the common power supply through the first relay, the two relays can be interlocked, only one path of power supply output can be limited, and therefore, even if the armature in the relay shakes or the mechanical failure in the relay occurs, the two armatures can not be switched to the same power supply at the same time, the two power supplies can not be connected together, the short circuit phenomenon can not occur, the reliability and the safety performance are high, in addition, the two relays can also form double-contact isolation, the withstand voltage value is increased, and larger current can flow through the relays.

In some embodiments, further comprising: the first prompting loop is connected with the output end of the load loop, and a user can visually know whether the load loop has normal current output or not by observing the light-emitting condition of the first prompting loop.

In some embodiments, further comprising: the second suggestion return circuit is connected with the input of second power supply loop, through setting up the second suggestion return circuit, can be more audio-visual the first stand-by power supply of observation still have the electric energy surplus, avoids the power failure of common power supply, and stand-by power supply's electric energy is exhausted again, can't carry out the condition of stand-by power supply.

Drawings

FIG. 1 is a schematic diagram of a dual-power auto-switcher according to the present invention;

FIG. 2 is a circuit diagram of a dual-power auto-switcher with a common power supply according to the present invention;

FIG. 3 is a circuit diagram of a secondary integrated dual power automatic switch standby power supply of the present invention;

fig. 4 is a circuit diagram of a conventional dual power automatic switch.

Reference numerals:

1. a first power supply loop; 2. a load circuit; 3. a first relay; 4. a second power supply loop; 5. a second relay; 6. a first prompting loop; 7. a second prompting loop; 8. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings in combination with the embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The utility model provides a double-power automatic switcher with double-power integration, which comprises: the power supply system comprises a shell 8, a first power supply circuit 1, a second power supply circuit 4, a load circuit 2, a first relay 3 and a second relay 5, wherein the first power supply circuit, the second power supply circuit 4, the load circuit 2, the first relay 3 and the second relay 5 are arranged in the shell 8; in particular, the method comprises the following steps of,

the input end of the first power supply loop 1 is connected with a common power supply, and the output end of the first power supply loop is connected with the normally closed contact of the first relay 3;

the input end of the second power supply loop 4 is connected with a standby power supply, and the output end of the second power supply loop is connected with the normally closed contact of the second relay 5;

the common end of the first relay 3 is connected with the input end of the load loop 2, and the control end is connected with the common end of the second relay 5;

the control terminal of the second relay 5 is connected to the input terminal of the first power supply circuit 1.

Specifically, the switching process of the switch is as follows:

referring to fig. 2, when the common power supply supplies power normally, the common power supply inputs current to the control end of the second relay 5, the coil is powered on, the armature is controlled to be pulled down to be connected with the normally open contact, the standby power supply is disconnected, the common power supply supplies power to the load circuit, and the common power supply supplies power to the load power supply;

referring to fig. 3, when the power of the normal power supply is cut off and the standby power supply supplies power, the control end of the second relay 5 loses power, the armature resets upwards and is connected with the normally closed contact, the standby power supply is switched on, the control end of the first relay 3 gets power, the armature is controlled to move downwards and is connected with the normally open contact of the first relay 3, the normal power supply is switched off, the standby power supply is switched on with the load circuit 2, and the standby power supply supplies power to the load circuit.

Referring to fig. 4, in the conventional dual power automatic switch, two power supplies are switched by only one relay, and when two armatures do not jump to a contact of the same circuit at the same time due to the jitter or mechanical failure during the switching of the armatures, the two power supplies are switched on, so that the two power supplies are short-circuited. After this application has set up two relays, even armature shake or two armatures do not jump to the contact of same return circuit simultaneously, owing to cut off wherein power all the way, consequently two way powers can not be connected simultaneously, can not produce the short circuit phenomenon.

In the first preferred embodiment, a first prompting loop 6 is provided, a light emitting diode is provided on the first prompting loop 6, the first prompting loop 6 is connected in parallel to the load loop 2, when current is output on the load loop 2, the light emitting diode of the first prompting loop 6 is on, and a user can know whether the current of the load loop 2 is normally output by observing whether the first prompting loop 6 is on.

In a second preferred embodiment, a second prompting loop 7 is provided, the second prompting loop 7 is connected in parallel to the second power supply loop 4, a light emitting diode is provided on the second prompting loop 7, the second prompting loop 7 is used for observing whether the standby power supply has electric energy, if the standby power supply has electricity, the light emitting diode of the second prompting loop 7 is normally on, and if not, the light emitting diode is off, so that the electric energy of the standby power supply can be prevented from being exhausted, when the common power supply is powered off, the electric energy of the standby power supply is consumed again, and the standby power supply cannot be carried out.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A two-shot fusion dual power automatic switcher, comprising: shell (8), set up first power supply circuit (1), second power supply circuit (4), load circuit (2), first relay (3) and second relay (5) in shell (8), wherein, the input and the power of using always of first power supply circuit (1) are connected, the output with the normally closed contact of first relay (3) is connected, the input of load circuit (2) with the common port of first relay (3) is connected, and the output is connected with the load, the input and the stand-by power supply of second power supply circuit (4) are connected, the output with the normally closed contact of second relay (5) is connected, the control end of second relay (5) is connected with the input of first power supply circuit (1), the common port with the control end and the normally open contact of first relay (3) are connected.

2. The dual-power automatic switcher of claim 1, further comprising: and the first prompting loop (6) is connected with the output end of the load loop (2) and is used for prompting whether the load loop (2) outputs current or not.

3. The dual-power automatic switcher of claim 1 or 2, further comprising: and the second prompting loop (7) is connected with the input end of the second power supply loop (4) and is used for prompting whether the second power supply loop (4) has current input or not.