CN214100830U

CN214100830U - Portable overvoltage electricity limiting protector

Info

Publication number: CN214100830U
Application number: CN202023336362.8U
Authority: CN
Inventors: 朱一安; 关鑫; 麻志鹏
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-31
Anticipated expiration: 2030-12-30

Abstract

The utility model provides a portable superpressure limit electricity protector, belongs to electron technical field, the utility model discloses a solve and to carry out overvoltage protection to the consumer now and need install in advance inside the consumer, can't carry out overvoltage protection's problem to the consumer temporarily. The device comprises a box body, a box cover, a rotating shaft and an overpressure detection circuit; the case cover is arranged at the upper end of the case body through a rotating shaft, and the overpressure detection circuit is arranged in a hollow inner cavity of the case body; a protector leading-out joint A, a protector leading-out joint B, a potentiometer R1 sliding handle, a loudspeaker H1, light-emitting diodes D3 and D4 are arranged on the panel of the box body; the protector leading-out connectors A and B are respectively connected to two ends of the electric equipment through connecting wires, a sliding handle of a potentiometer R1 is adjusted according to different electric equipment, an R1 moving contact point slides to change the preset protection voltage value of the electric equipment, and when the voltage of the two ends of the electric equipment exceeds the preset protection voltage value, a loudspeaker H1 gives an alarm. And detecting and alarming for the over-working voltage phenomenon of the equipment.

Description

Portable overvoltage electricity limiting protector

Technical Field

The utility model relates to an superpressure limit for electricity protector belongs to electron technical field.

Background

When electricity is used, the phenomenon that the working voltage is exceeded often occurs, and the phenomenon belongs to the electromagnetic disturbance phenomenon in the electricity utilization process. If the voltage of the electric appliance is suddenly overhigh and exceeds the insulation strength and the voltage withstanding value of the electric equipment, the electric equipment can generate heat, break down and burn out or even catch fire. The area damaged by the accident of too high voltage is often huge, and the consumer in the whole power supply area can be influenced, and can threaten life and property safety in serious cases. In order to prevent the overvoltage from threatening the normal operation and safety of the equipment and because of the uncertainty of the overvoltage itself, it is impossible to completely eliminate or prevent the generation of the overvoltage, it is necessary to detect the operating voltage of the electric equipment and to alarm when the safety voltage is exceeded.

Therefore, voltage protection of the consumer is necessary. Overvoltage protection is a way of protecting a power supply from being turned off or a controlled device from being dropped when the voltage exceeds a predetermined maximum value. The overvoltage protectors are available in many forms, some are installed inside the equipment, and some are installed on the power supply side.

However, the overvoltage protector needs to be installed inside the electric equipment or in the power supply in advance, and in real life, the situation that the electric equipment needs to be protected temporarily by overvoltage often occurs, and the prior art has no simple and easy operation mode.

SUMMERY OF THE UTILITY MODEL

Carry out overvoltage protection to consumer to current and need install in advance inside the consumer, can't carry out overvoltage protection's problem to the consumer temporarily, the utility model provides a portable superpressure electricity limit protector.

The utility model relates to a portable overvoltage electricity-limiting protector, which comprises a box body, a box cover, a rotating shaft and an overvoltage detection circuit;

the case cover is arranged at the upper end of the case body through a rotating shaft, and the overpressure detection circuit is arranged in a hollow inner cavity of the case body;

a protector leading-out joint A, a protector leading-out joint B, a sliding handle of a potentiometer R1, a loudspeaker H1, a light-emitting diode D3 and a light-emitting diode D4 are arranged on a panel of the box body; the protector leading-out joint A and the protector leading-out joint B are respectively connected with two ends of electric equipment through connecting wires, a sliding handle of a potentiometer R1 is adjusted according to different electric equipment, a movable contact of the potentiometer R1 slides to change a preset protection voltage value of the electric equipment, and when the voltage of the two ends of the electric equipment exceeds the preset protection voltage value, a loudspeaker H1 gives an alarm;

the overvoltage detection circuit comprises a potentiometer R1, resistors R2-R9, capacitors C1-C6, light emitting diodes D3-D4, diodes D1, D2 and D5, a solid state relay SSR, NE556 and a loudspeaker H1;

NE556 pin 14 is connected to one end of resistor R6, one end of resistor R5, pin No. 4 of NE556, cathode of diode D5, one end of resistor R4, one end of resistor R2, one end of capacitor C2 and cathode of diode D2, the other end of resistor R6 is connected to anode of led D3, cathode of led D3 is connected to pin No. 1 of NE556, the other end of resistor R5 is connected to pin No. 2 of NE556, the other end of resistor R4 is connected to pin No. 6 of NE556, one end of capacitor C4, one fixed end of potentiometer R1 and the movable contact of potentiometer R1, the other fixed end of potentiometer R1 is connected to one end of resistor R9, one end of capacitor C3 and one end of resistor R3, the other end of resistor R3 is connected to anode of diode D1, cathode of diode D1 is connected to anode of diode D6867 and one end of capacitor C3687458, and the other end of capacitor C1 is connected to positive electrode of power supply C1, the other end of the resistor R2 is connected to the second input terminal of the solid-state relay SSR,

the No. 13 pin of the NE556 is simultaneously connected with the No. 9 pin, one end of a capacitor C6 and one end of a resistor R9, the other end of the capacitor C6 is connected with one end of a loudspeaker H1,

the pin 12 of the NE556 is simultaneously connected to the pin 8, the other end of the resistor R9 and one end of the capacitor C5,

the No. 10 pin of the NE556 is simultaneously connected with the No. 5 pin, one end of a resistor R8 and a first input end of the solid-state relay SSR, the other end of the resistor R8 is connected with the anode of a light-emitting diode D4,

the No. 7 pin of the NE556 is simultaneously connected with the other end of the loudspeaker H1, the other end of the capacitor C5, the cathode of the light-emitting diode D4, the other end of the capacitor C4, the anode of the diode D5, the other end of the resistor R7, the other end of the capacitor C3, the other end of the capacitor C2, a first output end of the solid-state relay SSR and the negative electrode of a power supply;

the other end of the capacitor C1 serves as a protector leading-out terminal a, and the second output end of the solid-state relay SSR serves as a protector leading-out terminal B.

Preferably, the box cover further comprises a handle, and the handle is arranged on the box cover.

Preferably, the device also comprises a pulley which is arranged at the bottom of the box body.

Preferably, the light emitting diode D3 emits light to indicate that the electric device is working normally, and the light emitting diode D4 emits light to indicate that the electric device is in the power-off protection state.

Preferably, the diode D5 is a 10V zener diode.

Preferably, the capacitor C1 is a 0.47 μ F step-down capacitor.

The utility model has the advantages that: any electric equipment can be simply and easily protected from overvoltage, and when the line voltage of the electric equipment exceeds a preset maximum value, an alarm is given. And two light-emitting diodes are arranged at the same time, and are used for displaying that the electric equipment is in a normal working state or a power-off protection state respectively.

Drawings

Fig. 1 is a schematic structural diagram of a portable overvoltage electricity-limiting protector according to the present invention;

fig. 2 is a schematic structural view of the box panel of the present invention;

fig. 3 is a schematic circuit diagram of the overvoltage detection circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

In a first specific embodiment, as shown in fig. 1 to 3, the portable overvoltage power limiting protector of the present invention includes a case 1, a case cover 2, a rotating shaft 4, and an overvoltage detection circuit;

the box cover 2 is arranged at the upper end of the box body 1 through a rotating shaft 4, and the overpressure detection circuit is arranged in a hollow inner cavity of the box body 1;

a protector leading-out joint A, a protector leading-out joint B, a sliding handle of a potentiometer R1, a loudspeaker H1, a light-emitting diode D3 and a light-emitting diode D4 are arranged on a panel 1-1 of the box body 1; the protector leading-out joint A and the protector leading-out joint B are respectively connected with two ends of electric equipment through connecting wires, a sliding handle of a potentiometer R1 is adjusted according to different electric equipment, a movable contact of the potentiometer R1 slides to change a preset protection voltage value of the electric equipment, and when the voltage of the two ends of the electric equipment exceeds the preset protection voltage value, a loudspeaker H1 gives an alarm;

Further, the box cover also comprises a handle 3, and the handle 3 is arranged on the box cover 2.

Still further, it also comprises a pulley 5, and the pulley 5 is arranged at the bottom of the box body 1.

Further, when the light emitting diode D3 emits light, it indicates that the electric device is working normally, and when the light emitting diode D4 emits light, it indicates that the electric device is in the power-off protection state.

Still further, the diode D5 is a 10V zener diode.

In the embodiment, the diode D5 can work normally within the regulated voltage value of 6-15V.

Still further, the capacitor C1 employs a 0.47 μ F step-down capacitor.

In this embodiment, the capacitor C1 needs to be sufficiently resistant to voltage, and when the circuit is in a protection state, the capacitor C1 is still supplied with power safely, so that the circuit operates normally.

And further, the SSR primary driving current is 5mA, the output switching current is 0.5-40A, the withstand voltage comprises 100V, 200V and 380V of alternating current, and the SSR primary driving current is selected according to the specific requirements of electric equipment.

The working principle of the overvoltage detection circuit of the present invention is explained with reference to fig. 3:

the circuit on the left side of the NE556 forms a monitoring comparison circuit, the circuit on the right side of the NE556 forms a sounding alarm oscillating circuit, and the potentiometer R1 is used for changing the preset voltage of an alarm point.

The direct current working power supply adopts a capacitor voltage reduction power supply mode, the positive half cycle rectification and filtering is stabilized to be about 10V for the NE556 to work, the negative half cycle rectification and smoothing is used as a commercial power voltage change sampling signal, the ground wire of the commercial power 220V is used as a public wire, the direct current working voltage is positive, and the voltage of the sampling signal is negative.

Under the condition of normal power supply, the voltage of the 6 th pin of the left circuit of the NE556 is set to be one third of the voltage of a direct current power supply, then the 5 th pin and the 1 st pin are output to be low level after the power supply is started, the SSR is conducted to supply power to equipment, the D3 emits light, meanwhile, the 10 th pin on the right of the NE556 is added with low level (0.1V-0.4V) to enable the equipment to be in a reset state, the equipment does not oscillate, the loudspeaker H1 does not emit sound, and the D4 does not emit light.

If the voltage of the 220V alternating current power grid is in an overvoltage state, the voltage value of a negative sampling signal rectified in a negative half cycle is increased, the voltage of the No. 6 pin of the NE556 is reduced to be less than one third of that of a direct current power supply (+10V), at the moment, the No. 5 pin of the NE556 becomes high level, the SSR is cut off, the power-off protection is realized, the D4 emits light, the No. 1 pin is internally opened, the D3 does not emit light, meanwhile, the high level (8.7V) is added to the No. 10 pin on the right side of the NE556 to remove the reset, audio oscillation is generated, and the loudspeaker H1 gives out an alarm.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A portable overvoltage electricity-limiting protector is characterized by comprising a box body (1), a box cover (2), a rotating shaft (4) and an overvoltage detection circuit;

the box cover (2) is arranged at the upper end of the box body (1) through a rotating shaft (4), and the overpressure detection circuit is arranged in a hollow inner cavity of the box body (1);

a protector leading-out joint A, a protector leading-out joint B, a sliding handle of a potentiometer R1, a loudspeaker H1, a light-emitting diode D3 and a light-emitting diode D4 are arranged on a panel (1-1) of the box body (1); the protector leading-out joint A and the protector leading-out joint B are respectively connected with two ends of electric equipment through connecting wires, a sliding handle of a potentiometer R1 is adjusted according to different electric equipment, a movable contact of the potentiometer R1 slides to change a preset protection voltage value of the electric equipment, and when the voltage of the two ends of the electric equipment exceeds the preset protection voltage value, a loudspeaker H1 gives an alarm;

2. A portable overvoltage and current limiting protector according to claim 1 further comprising a handle (3), the handle (3) being disposed on the cover (2).

3. A portable overvoltage and current limiting protector according to claim 1, further comprising a pulley (5), the pulley (5) being disposed at the bottom of the case (1).

4. The portable overvoltage and current limiting protector as claimed in claim 1, wherein the light emitting diode D3 is illuminated to indicate normal operation of the electrical equipment, and the light emitting diode D4 is illuminated to indicate power-off protection of the electrical equipment.

5. The portable overvoltage and current limiting protector according to claim 1, wherein the diode D5 is a 10V zener diode.

6. The portable overvoltage and current limiting protector according to claim 1, wherein the capacitor C1 is a 0.47 μ F step-down capacitor.