CN201008052Y

CN201008052Y - All-around safety plug

Info

Publication number: CN201008052Y
Application number: CNU2006201414880U
Authority: CN
Inventors: 钱加灿
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-23
Filing date: 2006-12-23
Publication date: 2008-01-16
Anticipated expiration: 2016-12-23

Abstract

The utility model relates to an almighty safe plug which can prevent electrification of fire wire, null line and ground wire and over heating. The utility model comprises a fire, a null and a ground electrodes, a zero sequence current mutual inductor between the fire and null wire, a test loop, an amplifying circuit, a direct power source and a trip, wherein the ground wire is connected with a stable contact point by an active contact elastic sheet, the ground wire is sleeved with the zero sequence current mutual inductor, the second output end of the ground wire zero sequence current mutual inductor is connected in parallel with another amplifying circuit, the output end of the other amplifying circuit is connected in series with a diode and then contacts with flip-flop stage of a controllable silicon, the original amplifying circuit output end is connected in series with a diode and then contacts with flip-flop stage of a controllable silicon. The utility model has the advantages that the utility model not only can prevent electrification of the fire wire, the null line and the ground wire and be employed under any environment, but also can prevent overheating of the plug and parch of the appliance, which is worthy of the name almighty safe plug.

Description

Omnipotence safety plug

Technical field

The utility model relates to a kind of attaching plug, particularly relate to a kind of can fire line, zero line, ground wire electrification can prevent the omnipotence safety plug of overtemperature again.

Background technology

Disclosed a kind of all-purpose leakage protection plug among the Chinese patent literature CN1142618C; in the power line ground wire, be provided with the ground wire electrified detection inductor; in phase; be provided with zero sequence current mutual inductor between the zero line; and plug inside phase; zero; be equipped with a pair of contact between ground wire and the breaker; be connected to spring between breaker upper end and the ground wire moving contact copper reed; make a pair of contact of ground wire have a spring force of inhaling mutually all the time; when moving, realizes by the trip free device connecting earlier ground wire; phase is connected in the back; the zero line or the first phase failure; zero line; the disconnected ground wire in back; thereby satisfy the safety utilization of electric power requirement; but there is following shortcoming: 1; phase; when the zero-sequence mutual inductance coil of zero line breaks down; for example break etc.; the zero-sequence mutual inductance coil of ground wire just can not work, the purpose that can in time cut off in the time of therefore also can't reaching ground wire electrification.2, owing to be through between zero-sequence mutual inductance coil on zero-sequence mutual inductance coil on the ground wire and phase line, the zero line and insert same amplifier input terminal; influenced the output voltage of the zero-sequence mutual inductance coil on the ground wire; thereby influence the operating current of ground wire; operating current when making the ground wire electric leakage has surpassed the safe current that human body bears; therefore can not play a protective role, still entail dangers to people's life security.3, the zero-sequence mutual inductance coil temperature influence on the ground wire is bigger in this circuit, and its operating current can vary with temperature and acute variation, therefore can't adapt to different environments for use.4, it adopts so-called two Room to prevent the overtemperature of plug, can not effectively reach the purpose that prevents overtemperature.

The safety plug of disclosed a kind of defense sector tape electricity among the Chinese patent literature CN2609228 Y that I apply for, it adopts different tripping mechanisms and the mechanism that prevents overtemperature with the aforementioned patent document, though improved fail safe, but since its ground wire with mutually, the zero sequence tripping coil of zero line still uses same amplifier, therefore also have the shortcoming similar to above-mentioned patent, fail safe is not high enough.

Summary of the invention

Technical problem to be solved in the utility model is to provide omnipotence safety plug at the defective of above-mentioned prior art, the purpose of stable disconnection rapidly when reaching ground wire electrification.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

Omnipotence safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, amplifying circuit, DC power supply, controllable silicon, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the secondary output end of the zero sequence current mutual inductor in the described ground wire and another amplifying circuit are connected in parallel, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of another amplifying circuit, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of described former amplifying circuit.

Also have temperature controller in the above-mentioned plug, its thermistor places the zero line of plug and the middle insulator of pin of phase line.

Also connect the anti-dry circuit in the above-mentioned plug.

The utility model has made full use of the protection mechanism of original phase, zero line protection plug; utilize the induction coupling of coil and produce electric principle; in ground wire, add coupling coil; and utilize original protection mechanism; with original amplifying circuit, circuits for triggering, test loop, release disengagement and close mechanism, independently ground wire zero sequence coil amplifying circuit is set also as phase, zero line.Whether have or not the residual current except that detecting between load phase, the zero line, it is charged also to detect ground wire.When zero line or ground wire broke down respectively or simultaneously, two magnetic test coils all can all disconnect phase, zero, ground wire immediately, promptly cut off the electricity supply, thereby have ensured personal safety effectively.

Compared with prior art, advantage of the present utility model is:

1, the amplifying circuit of the zero-sequence transformer by independent setting and connect with diode, under the amplifier inefficacy and serviceability temperature variation situation greatly of phase, zero line, when appearance ground wire accident is charged, still can be immediately dump, thereby can stably prevent ground wire electrification, guarantee user's personal safety.

2, thermistor is placed plug between live wire and zero line; therefore the heat that produces in live wire and zero line and the socket can in time pass to thermistor; can not influence protector even the plug temperature is too high yet, more can not burn out protector, thereby more improve the fail safe of plug.

3, owing to also be provided with the anti-dry circuit in the plug, therefore in case the power load overtemperature will cut off the power supply automatically when linking to each other with power load, so can dry combustion method.

The safety plug can prevent the charged of phase, zero, ground wire and can use under various environment, can prevent the overtemperature of plug own again, can also prevent the dry combustion method of electrical appliance, has therefore become omnipotence safety plug worthy of the name.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1 is the circuit diagram of omnipotence safety plug, it comprises belt switch K1, K2, the phase of K3, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor ZCT1 between the zero line, the test loop that resistance R 5 and button T form, amplifying circuit IC1, DC power supply DC, release ZK, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor ZCT2 in the ground wire, the secondary output end of the zero sequence current mutual inductor in the described ground wire and another amplifying circuit IC2 are connected in parallel, and link to each other with the trigger electrode of controllable silicon SCR behind diode D2 of output serial connection of another amplifying circuit IC2.

Ground wire earth leakage protective is to increase an amplification circuit IC2 in original leakage protection circuit again in the foregoing circuit; controllable silicon SCR and DC power supply DC are shared; the output of original amplification circuit IC1 and ground wire respectively are connected in series diode D1, a D2 with the output of amplifying circuit IC2 and are connected with the trigger electrode of controllable silicon SCR; the positive pole of diode D1, D2 is connected with the output of the IC1 of amplification circuit, IC2; the negative pole of diode D1, D2 is connected with the trigger electrode of controllable silicon SCR, a capacitor C 1 in parallel between silicon controlled trigger electrode and the negative pole.

Overtemperature prote device circuit is: thermistor RT is connected with the positive source of integrated circuit (IC) 1, IC2 with resistance R 1 series connection back one end; the other end is connected with resistance R 2; the end of R2 is connected with power supply DC negative pole; be connected a diode D3 and positive pole between resistance R 1 and thermistor RT and the resistance R 2, the negative pole of diode D3 is connected with the trigger electrode of controllable silicon SCR.

The anti-dry circuit is: a dielectric capacitance C2 in parallel and resistance R 3 between the trigger electrode of controllable silicon SCR and the negative electrode, diode D4 of controllable silicon SCR trigger electrode series connection, diode D4 negative pole links to each other with the trigger electrode of controllable silicon SCR, the positive pole of diode D4 links to each other with R4, R4 links to each other with transducer 1, one of transducer 1 is terminated at any utmost point in the current supply circuit, receives among the figure on the L line.

The sensor is the open type transducer, as long as be open-circuit condition when operate as normal, the transducer that can sport channel status when non-normal working is all available.It can be bimetal leaf, magnetic sentive switch, displacement transducer, liquid-level switch, thermal-reed switch or the like.

The sensor is connected in the electrical equipment, and when taking place to heat up in the electrical equipment, transducer just can become short circuit by open circuit like this; thereby the connection circuits for triggering make trip coil energising work, by the earth leakage protective device deenergization; thereby prevent the electrical equipment dry combustion method, protection electrical equipment, prevent the generation of accident.

The sensor can have a plurality of, receives in a plurality of electrical equipment the safe operation of control apparatus respectively.Because earth leakage protective device can not automatically reset, only after abnormal condition is got rid of.Press the reset key of earth leakage protective device again, just can restore electricity. satisfied safety requirements.

At diode D1, D2, D3, D4 two ends difference shunt capacitance C2, C3, C4, the C6 of foregoing circuit, performance is better like this.

The mechanical part of tripping mechanism has a kind of open in detail in Chinese patent ZL032297467, and tripping mechanism can also adopt other mechanisms.

Because triggering the dropout principle has been known, therefore be not described in detail in this.

Claims

1. omnipotence safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, amplifying circuit, DC power supply, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the secondary output end of the zero sequence current mutual inductor in the described ground wire and another amplifying circuit are connected in parallel, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of another amplifying circuit, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of described former amplifying circuit.

2. all-round protection plug as claimed in claim 1; it is characterized in that: also have temperature controller in the described plug; its thermistor RT is connected with the positive source of integrated circuit (IC) 1, IC2 with resistance R 1 series connection back one end; the other end is connected with resistance R 2; the end of R2 is connected with power supply DC negative pole; be connected a diode D3 and positive pole between resistance R 1 and thermistor RT and the resistance R 2, the negative pole of diode D3 is connected with the trigger electrode of controllable silicon SCR.

3. all-round protection plug as claimed in claim 2 is characterized in that: described thermistor places the zero line of plug and the middle insulator of pin of phase line.

4. as claim 1,2,3 described any all-round protection plugs; it is characterized in that: also connect the anti-dry circuit: a dielectric capacitance C2 in parallel and resistance R 3 between the trigger electrode of controllable silicon SCR and the negative electrode; diode D4 of controllable silicon SCR trigger electrode series connection; diode D4 negative pole links to each other with the trigger electrode of controllable silicon SCR; the positive pole of diode D4 links to each other with R4; R4 links to each other with transducer 1, and one of transducer 1 is terminated at any utmost point in the current supply circuit.

5. as claim 1,2,3 described any all-round protection plugs, it is characterized in that: electric capacity in parallel between each diode in the described circuit.

6. all-round protection plug as claimed in claim 4 is characterized in that: electric capacity in parallel between each diode in the described circuit.