CN101707167B

CN101707167B - Circuit breaker with temperature detection function

Info

Publication number: CN101707167B
Application number: CN 200910179394
Authority: CN
Inventors: 万家盛; 汪志强
Original assignee: Hubei Shengjia Wiring Co Ltd
Current assignee: Hubei Shengjia Wiring Co Ltd
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2013-03-27
Anticipated expiration: 2029-09-30
Also published as: CN101707167A

Abstract

The present invention is a circuit breaker with temperature detection function, which includes: a box made of insulating and flame-retardant materials, and the box also includes: a first circuit breaking unit, which includes an action mechanism, It is used to realize the on-off of the load and the power line under normal conditions; a temperature sensor, which detects the internal temperature of the box body, and outputs a detection signal representing the temperature value; a second circuit breaker control unit, when the temperature value is higher than a When the threshold is reached, the first breaking unit is controlled to generate a breaking action.

Description

Circuit breaker with temperature detecting function

Technical field

What the present invention relates to is a kind of circuit breaker, and particularly a kind of can have the intelligent breaker that circuit breaker interior contacts temperature is carried out measuring ability.

Background technology

Switch switchgear for power department, be the assurance Electrical Safety, carry out the requisite equipment of circuit switching, existing circuit breaker comprises high and low pressure circuit breaker etc., its internal structure sees also shown in Figure 1, it is as example take miniature circuit breaker, it comprises: a box body 001, and adopt the flame-resistant insulation material to make, section is provided with following structure within it:

One live wire incoming end 032 and a live wire output 037 are in order to be linked in the power line; One actuating mechanism, it comprises: one handle 021, it has an operating side and is arranged at outside the described box body 001, carries out the break-make control of circuit; One movable contact spring 024, its end have a moving contact 025; One interlock controll block group 022, it is comprised of a plurality of STATEMENT OF FEDERALLY SPONSORED, rotate by the axle that is arranged in the described box body 001, an end of its STATEMENT OF FEDERALLY SPONSORED that goes up most 0221 is connected with described handle 021, and the end of bottom STATEMENT OF FEDERALLY SPONSORED 0222 is connected with the front end of described movable contact spring 023; One fixed contact 031, it is connected with described live wire input 032, when the described interlock controll block group 022 of turn handle 021 pulling, thereby causes seesawing of movable contact spring 024, the contact that realizes moving contact 025 and fixed contact 031 with separate, finally reach the purpose of power circuit break-make.It also comprises: an arc-extinguishing mechanism and an overcurrent protection mechanism; described arc-extinguishing mechanism is in order to eliminate electric arc to the destruction of circuit breaker; it comprises a metallic plate 033 and an arc-extinguish chamber 035; described metallic plate 033 is connected with described fixed contact 031 and extends to described box body 001 bottom, and described arc-extinguish chamber 035 is corresponding with described fixed contact 031.Described overcurrent protection mechanism is a magnetictrip 051; be arranged at described actuating mechanism bottom; the one end is connected with described movable contact spring upper end 023; its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED 052; the other end of described STATEMENT OF FEDERALLY SPONSORED 052 is connected with described interlock controll block group 022; when overcurrent appears in power line, make described dynamic and static contact separately, load and power line disconnect.

But along with people to improving constantly that electric power safety and control require, existing circuit breaker is to be difficult to reach this requirement, still there is following defective in it by analysis:

At first, present circuit breaker incoming end and output do not have temperature detection control function, and in the past because of excess Temperature, and the fire that causes is of common occurrence, also causes a hidden trouble to normal power supply;

Secondly, different circuit breakers is not significantly distinguished part, and the circuit breaker that more particularly has specific function such as prepayment breaker, in case be replaced, just causes confusion to the management of power use, so " identity " of circuit breaker is very important.

At last, the operating position for management of power use department does not know the circuit breaker corresponding line of present bottom needs long-range information transmission especially.

In view of defects, creator of the present invention has obtained this creation finally through long-term research and test.

Summary of the invention

The object of the invention is to, a kind of circuit breaker with temperature detecting function is provided, in order to overcome above-mentioned defective.

For achieving the above object, the technical solution used in the present invention is, a kind of circuit breaker with temperature detecting function is provided, and it comprises: a box body, and it adopts the flame-resistant insulation material to make, and it is characterized in that, also comprises at described box body:

One first breaking units, it comprises an actuating mechanism, in order to realize the break-make of load and power circuit under the normal condition;

One temperature sensor, it detects the box body internal temperature, and exports the detection signal of a sign temperature value;

One second control unit that opens circuit is controlled described the first breaking units and is produced the action of opening circuit when temperature value is higher than a threshold value.

Wherein, described actuating mechanism comprises:

One handle, it has an operating side and is arranged at outside the described box body;

One first movable contact spring, its end have one first moving contact;

One interlock controll block group, it is comprised of a plurality of interlock controll blocks, and by being hinged and connected, wherein an end of one first interlock controll block is connected with described handle, and an end of a terminal interlock controll block is connected with the front end of described the first movable contact spring;

One first fixed contact, it is connected with one first phase line splicing ear.

Better, described second control unit that opens circuit comprises:

One power circuit, it obtains voltage from phase line, through output after rectifying and wave-filtering and the voltage stabilizing processing;

One control circuit in order to receive the detection signal from described temperature sensor, is processed according to default program, and is produced a triggering signal;

One circuits for triggering that open circuit, it receives described triggering signal, triggers described the first breaking units action and cuts off power line.

Better, described second control unit that opens circuit comprises:

One control circuit is in order to receive the external control signal and to produce a triggering signal;

Wherein, the described circuits for triggering that open circuit comprise: an electromagnet, its armature combines with a linkage block in the described interlock controll block group, thereby by described armature movement described actuating mechanism is opened circuit described circuit breaker.

Better, also comprise: a trigger element, it is thyristor or relay, the trigger end of described thyristor or relay receives described triggering signal, thereby makes described magnet spool conducting.

Better, described control circuit comprises: one first photoelectrical coupler, and one input end receives external control signal, and its output is connected with the trigger end of described trigger element.

Better, described control circuit comprises: a processor, the control end of described processor is connected with the trigger end of described trigger element by one first triode, and described temperature sensor is for having unique physical address coding, and it is connected with the input of described processor.

Better, also comprise: a transport communication interface is connected with the output of described temperature sensor, and provides a power supply signal, described temperature sensor to have unique physical address coding.

Better, also comprise: a feedback circuit, it is connected with power circuit output, and is connected with described temperature sensor by one second triode, and described temperature sensor obtains the power supply signal that described transport communication interface provides by described the second triode.

Better, described feedback circuit comprises: one second photoelectrical coupler, and its input is connected with described power circuit output, and its output is connected with the base stage of described the second triode.

Better, also comprise: a telecommunication circuit, it is connected with described processor, uses so that the receiving system of circuit breaker and far-end carries out the mutual of data.

Better, also comprise: one of them is connected with described processor at least for a keyboard circuit or a display circuit or a memory circuit or a clock circuit.

Wherein, described power circuit comprises: a rectifier cell, and it obtains electric power from described phase line;

One filter element is with the noise filtering in the signal of telecommunication that obtains;

One voltage stabilizing element is with voltage stabilization;

One voltage drop element is in order to drop to specified scope with voltage.

Of the present invention producing effect again is compared with the prior art:

At first, can carry out real-time monitoring to the temperature of circuit breaker, and data are processed, when excess Temperature, cut off circuit breaker, thereby improved the safety of electricity consumption.

Again, have unique physical address code, offer unique identity of each circuit breaker, thereby each circuit breaker is identified, prevent from privately changing artificially, be convenient to the management of electricity consumption department;

At last, increase control function far away, be applicable to pre-payment etc. and use the fulgurite demand, and had certain intelligent characteristics, met the requirement of national intelligent grid.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the circuit breaker of prior art;

Fig. 2 is the circuit breaker functional block diagram that the present invention has temperature detecting function;

Fig. 3 is that the present invention is the circuit diagram with circuit breaker embodiment one of temperature detecting function;

Fig. 4 is that the present invention is the circuit diagram with circuit breaker embodiment two of temperature detecting function.

Embodiment

Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.

Need to prove that technical scheme of the present invention is applicable to the high and low pressure circuit breaker, its technological thought all is identical.

See also shown in Figure 2ly, it has the circuit breaker functional block diagram of temperature detecting function for the present invention, has the circuit breaker of temperature detecting function, and it comprises: a box body 1, and it adopts the flame-resistant insulation material to make, and also comprises at described box body 1:

One first breaking units 2, it comprises an actuating mechanism, in order to realize the break-make of load and power circuit under the normal condition;

One temperature sensor 3, it detects box body 1 internal temperature, especially for some tie points, the fever phenomenon of these tie points is the most obvious, and exports a detection signal that characterizes temperature value; The detection signal of output may be processed according to the program that sets in advance by the inner corresponding processing apparatus of circuit breaker, also it may be gone out be defeated by the control appliance (receiving system) of length of run, mainly receive corresponding detection signal, therefore be provided with two data passages for temperature sensor 3 on this accompanying drawing, in the product of reality, can there be at least wherein data passage;

One second control unit 4 that opens circuit is controlled described the first breaking units 2 and is produced the action of opening circuit when temperature value is higher than a threshold value, its also can and the control appliance (receiving system) of described length of run between carry out data alternately.

Described actuating mechanism comprises:

One first movable contact spring, its end have one first moving contact;

One first fixed contact, it is connected with described the first phase line splicing ear

See also shown in Figure 3ly, it is the circuit diagram with circuit breaker embodiment one of temperature detecting function for the present invention; Present embodiment is that the detection signal that will collect is transferred to long-range receiving system, whether produces the action of opening circuit by the described actuating mechanism that opens circuit of its control in the situation of excess Temperature, and wherein, described second control unit 4 that opens circuit comprises:

One power circuit, it obtains voltage from phase line, through output after rectifying and wave-filtering and the voltage stabilizing processing; Described power circuit comprises: a rectifier cell, and it obtains electric power from described phase line, and that adopt here is diode D2; One filter element, with the noise filtering in the signal of telecommunication that obtains, that adopt here is capacitor C 1, C5; One voltage stabilizing element, with voltage stabilization, the voltage stabilizing chip IC 5 that adopts here; One voltage drop element, in order to voltage is dropped to specified scope, that adopt here is resistance R 7, R2, R3.

One control circuit, in order to receive the external control signal and to produce a triggering signal, that adopt here is a photoelectrical coupler IC2, one input end is connected with the control signal output K of a transport communication interface JP, the data receiver DATA of described transport communication interface JP is connected with the output of described temperature sensor IC1 simultaneously, in order to obtain described detection signal; Described transport communication interface JP have a power supply signal output (+5V) in order to a power supply signal to be provided, described transport communication interface JP also has an earth terminal GND, described temperature sensor IC1 has unique physical address coding.

One circuits for triggering that open circuit, it receives described triggering signal, cuts off power line in order to trigger 1 action of described the first breaking units.Wherein, the described circuits for triggering that open circuit comprise: an electromagnet L1, its armature combines with a linkage block in the described interlock controll block group, thereby by described armature movement described actuating mechanism is opened circuit described circuit breaker.

The control signal output K of described transport communication interface JP is connected with a trigger element by a photoelectrical coupler IC2, described trigger element is thyristor or relay, the trigger end of described thyristor or relay receives described triggering signal, thereby makes the coil conducting (present embodiment is take controlled extension SCR as example) of described electromagnet L1.Described another input end grounding of photoelectrical coupler IC2, its output is connected with the trigger end of described controlled extension SCR, the control signal output K output signal of described transport communication interface JP is high potential all under normal circumstances, is that the described electromagnet L1 of electronegative potential does not have conducting to such an extent as to make described controlled extension SCR trigger end; Detection signal when described temperature sensor IC1 output, judge after process transport communication interface JP uploads and surpass temperature threshold, then can make described triggering signal be set to electronegative potential, to such an extent as to be the described electromagnet L1 of high potential turn-on action thereby make described controlled extension SCR trigger end, thereby by described armature movement described actuating mechanism opened circuit described circuit breaker.

Present embodiment also comprises simultaneously: a feedback circuit, it is connected with power circuit output, and be connected with described temperature sensor IC1 by one second triode Q1, described temperature sensor IC1 obtains the power supply signal that described transport communication interface JP provides by described the second triode Q1.Described feedback circuit comprises: a photoelectrical coupler IC3, and its input is connected with described power circuit output, and its output is connected with the base stage of described the second triode Q1.Namely when circuit breaker is not in off state, the base stage of described the second triode Q1 is electronegative potential and conducting, thereby is described temperature sensor IC1 power supply; Be in off state when opening circuit, then there is not power supply signal to offer described temperature sensor IC1, namely can be according to unique physical address of temperature sensor IC1 for the receiving system of far-end, and according to the default electron distributions figure in backstage, be confirmed to be which circuit breaker and be at this moment off state;

Even the electricity consumer self-changeable circuit breaker owing to do not have the adaptive of unique physical address code, management of power use department will know that the circuit breaker of a certain position exists private to change problem.

See also shown in Figure 4ly, it is the circuit diagram with circuit breaker embodiment two of temperature detecting function for the present invention; Be with the difference of a upper embodiment, in described control circuit, be provided with a processor MCU, thereby make described circuit breaker possess certain intelligent functions, the control end of described processor MCU is connected with the trigger end of described trigger element by one first triode Q1, described temperature sensor IC1 is for having unique physical address coding, and it is connected with the input of described processor MCU.Also comprise simultaneously: a telecommunication circuit JP, it is connected with described processor MCU, with so that the receiving system of circuit breaker and far-end carries out the mutual of data, here be that 485 bus mode communication is as example take what adopt, it is connected with described processor MCU by one 485 bus control unit IC2, the control end TXD of described processor MCU is connected with one the 3rd triode Q2, described bus reads from described processor MCU or input signal in order to switch, and by indicator light LED1, LED2 distinguishes indication, and described power circuit provides power supply signal for described processor and 485 bus control unit IC2.

In order better to embody intelligentized concept, the circuit breaker that the present invention has temperature detecting function also comprises: a keyboard circuit, give described processor in order to input of control commands, such as adjusting temperature threshold etc.; One display circuit is in order to the operating state that shows present circuit breaker and corresponding environmental information etc.; One memory circuit, it is in order to store data; And a clock circuit, it is in order to provide clock signal to described processor.

The present invention has the circuit breaker of temperature detecting function, and its advantage is,

The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limits, revise, even equivalence, but all will fall within the scope of protection of the present invention.

Claims

1. A circuit breaker with a temperature detection function, comprising: a box made of insulating and flame-retardant materials, characterized in that the box also includes:

A first circuit breaking unit, which includes an action mechanism, used to realize the on-off of the load and the power line under normal conditions;

A temperature sensor, which detects the temperature inside the box and outputs a detection signal representing the temperature value. The temperature sensor has a unique physical address code for position identification;

A second circuit breaking control unit, controlling the first circuit breaking unit to generate a circuit breaking action when the temperature value is higher than a threshold;

It also includes: a feedback circuit, which is connected to the output of the power supply circuit, and is used to cut off the power supply signal provided to the temperature sensor when the circuit breaker is in an open state.

2. The circuit breaker with temperature detection function according to claim 1, characterized in that, the action mechanism comprises:

a handle, which has an operating end disposed outside the box;

A first movable contact piece, the end of which has a first movable contact;

A linkage control block group, which is composed of a plurality of linkage control blocks connected by hinges, one end of a first linkage control block is connected to the handle, and one end of an end linkage control block is connected to the first The front ends of the moving contacts are connected;

A first static contact, which is connected with a first phase line connection terminal.

3. The circuit breaker with temperature detection function according to claim 2, characterized in that, the second circuit breaker control unit comprises:

A power supply circuit, which obtains the voltage from the phase line, and outputs it after rectification, filtering and voltage stabilization;

A control circuit, used to receive the detection signal from the temperature sensor, process it according to a preset program, and generate a trigger signal;

A circuit breaker trigger circuit, which receives the trigger signal and triggers the action of the first circuit breaker unit to make the circuit breaker in the circuit breaker state.

4. The circuit breaker with temperature detection function according to claim 2, characterized in that, the second circuit breaker control unit comprises:

A control circuit, used to receive an external control signal and generate a trigger signal;

5. The circuit breaker with temperature detection function according to claim 3 or 4, wherein the circuit breaker trigger circuit comprises: an electromagnet, the armature of which is connected to a linkage block in the linkage control block group In combination, through the action of the armature, the action mechanism breaks the circuit breaker.

6. The circuit breaker with temperature detection function according to claim 5, further comprising: a trigger element, which is a thyristor or a relay, and the trigger end of the thyristor or relay receives the trigger signal , so that the coil of the electromagnet is turned on.

7. The circuit breaker with temperature detection function according to claim 6, characterized in that, said control circuit comprises: a first photocoupler, one input end of which receives an external control signal, and its output end is connected to said The trigger terminal of the trigger element is connected.

8. The circuit breaker with temperature detection function according to claim 6, characterized in that, the control circuit comprises: a processor, the control terminal of the processor communicates with the The trigger end of the trigger element is connected, and the temperature sensor has a unique physical address code, which is connected with the input end of the processor.

9. The circuit breaker with temperature detection function according to claim 7, further comprising: a transmission communication interface connected to the output of the temperature sensor and providing a power signal.

10. The circuit breaker with temperature detection function according to claim 9, further comprising: a feedback circuit, which is connected to the output of the power supply circuit, and connected to the temperature sensor through a second triode connected, the temperature sensor obtains the power signal provided by the transmission communication interface through the second triode.

11. The circuit breaker with temperature detection function according to claim 10, characterized in that, said feedback circuit comprises: a second photocoupler, whose input end is connected with the output of said power supply circuit, and whose output terminal is connected with the base of the second triode.

12. The circuit breaker with temperature detection function according to claim 8, further comprising: a communication circuit, which is connected with the processor, in order to make the circuit breaker communicate with the remote receiving device Perform data interaction.

13. The circuit breaker with temperature detection function according to claim 12, further comprising: at least one of a keyboard circuit or a display circuit or a storage circuit or a clock circuit is connected to the processor connect.

14. The circuit breaker with temperature detection function according to claim 3 or 4, characterized in that, the power supply circuit comprises: a rectifying element, which obtains power from the phase line;

A filter element, which filters out noise in the obtained electrical signal;

A voltage stabilizing element to stabilize the voltage;

A step-down element used to drop the voltage to a specified range. the