CN205610198U - Portable power equipment protection device for construction - Google Patents

Abstract

The utility model discloses a portable power equipment protection device for construction, including casing (1), the XS (2) of socket group, commercial power joint (3) and control circuit, the commercial power connects (3) and sets up in casing (1) one side, and socket group XS (2) setting is on casing (1) surface, and control circuit sets up in casing (1), control circuit includes transformer T, and UR, relay K, electrolytic capacitor C, resistance R1~R4, transistor V1, V2, zener diode VS, potentiometre RP1, RP2, diode VD1, VD2, phase inverter D1~D3 are piled to the rectifier bridge. The circuit is simple, portable, and at alternating current power supply's overtension or cross low the emergence when unusual, can the automatic disconnection power supply, power equipment in the protection construction.

Description

Portable power supply for construction power equipment protecting equipment

Technical field

This utility model relates to a kind of electric equipment protection device, a kind of portable power supply for construction power equipment protecting equipment.

Background technology

Owing to development and the increasing electrical equipment of society are popularized, electric power has become as one of requisite energy of people；Permitted Many electric devices are all easily affected by voltage pulsation, perfect, essentially without electricity occurs due to incity, city circuit and transformer station Press big variation；But when constructing in some suburbs, it is typically all and from distant place, electric power is transmitted, by In intermediate conveyor apart from long and away from city, the most easily because of aging circuit or other emergency case Causing, the voltage of power of conveying is unstable, fluctuated；Now properly functioning on job location electric device will be subject to Impact, serious meeting causes device damage, makes engineering cannot continue to be smoothed out；Although now with overvoltage protection device, but It is that equipment is the biggest, the so inconvenient transport often changing place construction, and also circuit complexity is inconvenient to keep in repair.

Summary of the invention

The problem existed for above-mentioned prior art, this utility model provides a kind of portable power supply for construction power equipment protecting equipment, Circuit is simple, it is simple to carry, and when overtension or the too low generation exception of alternating current power supply, can automatically disconnect power supply, protection Power equipment in construction.

To achieve these goals, the technical solution adopted in the utility model is: this kind of portable power supply for construction power equipment protection Device, including housing, socket group XS, mains connection and control circuit, mains connection is arranged on housing side, socket group XS Being arranged on surface of shell, control circuit is arranged in housing,

Described control circuit includes transformator T, rectifier bridge stack UR, relay K, electrochemical capacitor C, resistance R1～R4, crystal Audion V1, V2, Zener diode VS, potentiometer RP1, RP2, diode VD1, VD2, phase inverter D1～D3, city Electric connection is connected with two lead-in clamps of transformator T, with transformator after the normally open contact of socket group XS SRE K T is in parallel, and two output wiring terminals of transformator T with rectifier bridge stack UR 1 mouthful and 3 mouthfuls respectively is connected, rectifier bridge stack UR's 2 mouthfuls with positive pole, one end of resistance R1, one end of resistance R2, one end of resistance R3 and the crystal triode of electrochemical capacitor C The colelctor electrode of V1 connects, and the other end of resistance R1 is connected with one end of potentiometer RP1, the other end of resistance R3 and crystal three The base stage of pole pipe V1 and the negative pole of Zener diode VS connect, and the other end of resistance R2 is connected with one end of potentiometer RP2, The current potential adjustable side of potentiometer RP2 is connected with the input of phase inverter D1, and the outfan of phase inverter D1 is with diode VD1's Negative pole connects, and the positive pole of diode VD1 is with the base stage of crystal triode V2, one end of resistance R4 and diode VD2 just Pole connects, and the other end of resistance R4 is connected with the emitter stage of crystal triode V1 and the colelctor electrode of crystal triode V2, two poles The negative pole of pipe VD2 is connected with the outfan of phase inverter D3, and the input of phase inverter D3 is connected with the outfan of phase inverter D2, The input of phase inverter D2 is connected with the current potential adjustable side of potentiometer RP1, the emitter stage of crystal triode V2 and relay K One end of solenoid connect, the other end of the solenoid of relay K and the positive pole of Zener diode VS, potentiometer RP2 4 mouthfuls of connections of the other end, the other end of potentiometer RP1, the negative pole of electrochemical capacitor C and rectifier bridge stack UR.

Further, also include that handle, described handle are arranged on housing outer surface.

Further, described crystal triode is NPN type triode.

Compared with prior art, this utility model uses housing, socket group XS, mains connection and control circuit to combine mode, Line voltage is after transformator T blood pressure lowering, rectifier bridge stack UR rectification and electrochemical capacitor C filter, and a road is through crystal triode V1 And Zener diode VS voltage stabilizing is adjusted to+12V, supply crystal triode V2 and the solenoid of relay K；Another road warp After resistance R1, potentiometer RP1 and resistance R2, potentiometer RP2 dividing potential drop, for phase inverter D1, D2, D3 and diode VD1, The voltage comparator of VD2 composition provides sampling voltage.

When line voltage is 190～240V, phase inverter D1 and D3 all exports high level, makes diode VD1 and VD2 cut Only, now crystal triode V2 saturation conduction, the solenoid of relay K obtains electric, and then the normally open contact of relay K closes Close, socket ZuXSYu city electric connection, for load electricity consumption.

When line voltage is less than lower voltage limit (such as 190V), the input of phase inverter D2 is low level, the output of phase inverter D2 For high level, make phase inverter D3 be output as low level, and then diode VD2 conducting, make crystal triode V2 end, continue The solenoid dead electricity of electrical equipment K, the normally open contact controlling relay K disconnects, and makes socket ZuXSYu city electrically disconnected；Cut off negative The working power carried.When line voltage is higher than upper voltage limit (such as 240V), the input of phase inverter D1 is high level, therefore Phase inverter D1 is output as low level, makes diode VD1 turn on, and makes crystal triode V2 end, the electromagnetism of relay K Coil losing electricity, the normally open contact controlling relay K disconnects, and makes socket ZuXSYu city electrically disconnected；Cut off the working power of load.

Therefore, to have circuit simple for this utility model, it is simple to carries, abnormal in overtension or the too low generation of alternating current power supply Time, can automatically disconnect power supply, the power equipment in protection construction.

Adjust potentiometer RP1 and RP2 and can set upper voltage limit of the present utility model and lower voltage limit respectively

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is circuit diagram of the present utility model.

In figure: 1, housing, 2, socket group XS, 3, mains connection, 4, handle.

Detailed description of the invention

The utility model is described in further detail below.

As depicted in figs. 1 and 2, this utility model includes housing 1, socket group XS2, mains connection 3 and control circuit, city Electric connection 3 is arranged on housing 1 side, and socket group XS2 is arranged on housing 1 surface, and control circuit is arranged in housing 1,

Described control circuit includes transformator T, rectifier bridge stack UR, relay K, electrochemical capacitor C, resistance R1～R4, crystal Audion V1, V2, Zener diode VS, potentiometer RP1, RP2, diode VD1, VD2, phase inverter D1～D3, city Electric connection is connected with two lead-in clamps of transformator T, with transformation after the normally open contact of socket group XS2 SRE K Device T is in parallel, and two output wiring terminals of transformator T with rectifier bridge stack UR 1 mouthful and 3 mouthfuls respectively is connected, rectifier bridge stack UR 2 mouthfuls with positive pole, one end of resistance R1, one end of resistance R2, one end of resistance R3 and crystal three pole of electrochemical capacitor C The colelctor electrode of pipe V1 connects, and the other end of resistance R1 is connected with one end of potentiometer RP1, the other end of resistance R3 and crystal The base stage of audion V1 and the negative pole of Zener diode VS connect, and the other end of resistance R2 is connected with one end of potentiometer RP2, The current potential adjustable side of potentiometer RP2 is connected with the input of phase inverter D1, and the outfan of phase inverter D1 is with diode VD1's Negative pole connects, and the positive pole of diode VD1 is with the base stage of crystal triode V2, one end of resistance R4 and diode VD2 just Pole connects, and the other end of resistance R4 is connected with the emitter stage of crystal triode V1 and the colelctor electrode of crystal triode V2, two poles The negative pole of pipe VD2 is connected with the outfan of phase inverter D3, and the input of phase inverter D3 is connected with the outfan of phase inverter D2, The input of phase inverter D2 is connected with the current potential adjustable side of potentiometer RP1, the emitter stage of crystal triode V2 and relay K One end of solenoid connect, the other end of the solenoid of relay K and the positive pole of Zener diode VS, potentiometer RP2 4 mouthfuls of connections of the other end, the other end of potentiometer RP1, the negative pole of electrochemical capacitor C and rectifier bridge stack UR.

Further, also include that handle 4, described handle 4 are arranged on housing 1 outer surface.

Further, described crystal triode is NPN type triode.

First mains plug 3 is begun to use after city's electric connection, when line voltage is 190～240V, phase inverter D1 and D3 all exports high level, makes diode VD1 and VD2 end, now crystal triode V2 saturation conduction, the electricity of relay K Magnetic coil obtains electric, and then the normally open contact Guan Bi of relay K, and socket ZuXS2Yu city electric connection, for load electricity consumption.

When line voltage is less than lower voltage limit (such as 190V), the input of phase inverter D2 is low level, the output of phase inverter D2 For high level, make phase inverter D3 be output as low level, and then diode VD2 conducting, make crystal triode V2 end, continue The solenoid dead electricity of electrical equipment K, the normally open contact controlling relay K disconnects, and makes socket ZuXS2Yu city electrically disconnected；Cut off The working power of load.

When line voltage is higher than upper voltage limit (such as 240V), the input of phase inverter D1 is high level, therefore phase inverter D1 It is output as low level, makes diode VD1 turn on, make crystal triode V2 end, the solenoid dead electricity of relay K, control The normally open contact of relay K processed disconnects, and makes socket ZuXS2Yu city electrically disconnected；Cut off the working power of load.

Adjust potentiometer RP1 and RP2 and can set upper voltage limit value of the present utility model and lower voltage limit value respectively.

Claims (3)

1. a portable power supply for construction power equipment protecting equipment, it is characterised in that include housing (1), socket group XS (2), Mains connection (3) and control circuit, mains connection (3) is arranged on housing (1) side, and socket group XS (2) is arranged on Housing (1) surface, control circuit is arranged in housing (1),

Described control circuit includes transformator T, rectifier bridge stack UR, relay K, electrochemical capacitor C, resistance R1～R4, crystal Audion V1, V2, Zener diode VS, potentiometer RP1, RP2, diode VD1, VD2, phase inverter D1～D3, city Electric connection is connected with two lead-in clamps of transformator T, with change after the normally open contact of socket group XS (2) SRE K Depressor T is in parallel, and two output wiring terminals of transformator T with rectifier bridge stack UR 1 mouthful and 3 mouthfuls respectively is connected, rectifier bridge stack 2 mouthfuls of UR with the positive pole of electrochemical capacitor C, one end of resistance R1, one end of resistance R2, one end of resistance R3 and crystal three The colelctor electrode of pole pipe V1 connects, and the other end of resistance R1 is connected with one end of potentiometer RP1, and the other end of resistance R3 is with brilliant The base stage of body audion V1 and the negative pole of Zener diode VS connect, and the other end of resistance R2 connects with one end of potentiometer RP2 Connecing, the current potential adjustable side of potentiometer RP2 is connected with the input of phase inverter D1, the outfan of phase inverter D1 and diode VD1 Negative pole connect, the positive pole of diode VD1 and the base stage of crystal triode V2, one end of resistance R4 and diode VD2's Positive pole connects, and the other end of resistance R4 is connected with the emitter stage of crystal triode V1 and the colelctor electrode of crystal triode V2, and two The negative pole of pole pipe VD2 is connected with the outfan of phase inverter D3, and the input of phase inverter D3 is connected with the outfan of phase inverter D2, The input of phase inverter D2 is connected with the current potential adjustable side of potentiometer RP1, the emitter stage of crystal triode V2 and relay K One end of solenoid connect, the other end of the solenoid of relay K and the positive pole of Zener diode VS, potentiometer RP2 4 mouthfuls of connections of the other end, the other end of potentiometer RP1, the negative pole of electrochemical capacitor C and rectifier bridge stack UR.

One the most according to claim 1 portable power supply for construction power equipment protecting equipment, it is characterised in that also include Handle (4), described handle (4) is arranged on housing (1) outer surface.

One the most according to claim 1 portable power supply for construction power equipment protecting equipment, it is characterised in that described crystalline substance Body audion is NPN type triode.