CN210605978U - Load fire alarm circuit - Google Patents
Load fire alarm circuit Download PDFInfo
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- CN210605978U CN210605978U CN201921635613.7U CN201921635613U CN210605978U CN 210605978 U CN210605978 U CN 210605978U CN 201921635613 U CN201921635613 U CN 201921635613U CN 210605978 U CN210605978 U CN 210605978U
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- 238000001514 detection method Methods 0.000 claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 21
- 239000010703 silicon Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 55
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims description 17
- 101150105073 SCR1 gene Proteins 0.000 claims description 17
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 11
- 238000010304 firing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a circuit protection technical field especially discloses a load alarm circuit that catches fire, including power supply circuit module, fault signal acquisition module, processing circuit module, trigger circuit module, power indicator circuit module and fault alarm circuit module, fault signal acquisition module includes smog detection sensor MQ1, and power supply circuit module gives the power supply of fault signal acquisition module, fault alarm circuit module includes RC step-down circuit, rectification filtering voltage stabilizing circuit, reset switch S1, fault indicator LED2, current-limiting resistance R11, relay K1 and silicon controlled rectifier SCR 1. By adopting the structure, the load firing alarm circuit is provided, wherein after the circuit is fired due to overload on the load side of the circuit breaker or loose wiring and other reasons, the trigger device triggers the tripper to trip (can also be set to not trip), and outputs a firing alarm signal.
Description
Technical Field
The utility model relates to a circuit protection technical field, especially a load circuit arouses the protection circuit that the circuit burning leads to the trouble because of reasons such as overload or wiring are not hard up.
Background
At present, in current circuit breaker product, after the load side leads to the wire to fire the burning because of transshipping or reason such as wiring is not hard up, because of some overcurrent do not reach the tripping operation condition of circuit breaker, so the circuit breaker does not trip to lead to whole block terminal to be burnt, perhaps the product tripping operation, but no signal feedback leads to the customer to be unknown, and the fault loss enlargements.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiency of the prior art, the utility model provides a behind the reason circuit such as overload or wiring become flexible on the load side of circuit breaker, trigger device triggers the tripper tripping operation (also can set for not tripping operation), and alarm signal's on fire load fires alarm circuit.
In order to realize the purpose, the utility model discloses a technical scheme is: a load fire alarm circuit comprises a power supply circuit module, a fault signal acquisition module, a processing circuit module, a trigger circuit module, a power supply indication circuit module and a fault alarm circuit module, wherein the fault signal acquisition module comprises a smoke detection sensor MQ1, the power supply circuit module supplies power to the smoke detection sensor MQ1, the processing circuit module comprises a resistor R8, a resistor R9, a capacitor C8, a potentiometer VR1 and a signal processing chip U1, 4 pins and 6 pins of the smoke detection sensor MQ1 are connected to 6 pins of the signal processing chip U1, one ends of the resistor R8 and the capacitor C8 are connected to 6 pins of the signal processing chip U1, the other end of the resistor R9 is grounded, one end of the resistor R9 is connected to 5 pins of the smoke detection sensor MQ1, the other end of the resistor R9 is connected to the ground, the other end of the trigger circuit module is connected to the ground, the trigger circuit module comprises an optical coupler OP1, a resistor R7, a capacitor C6 and, the fault alarm circuit module comprises an RC voltage reduction circuit, a rectification filtering voltage stabilizing circuit, a reset switch S1, a fault indicator lamp LED2, a current limiting resistor R11, a relay K1 and a controlled silicon SCR1, wherein the current limiting resistor R11 and the fault indicator lamp LED2 are connected in series and then connected in parallel with the relay K1, the anode of the controlled silicon SCR1 is connected with a fault indicator lamp LED2, the control electrode of the controlled silicon SCR1 is connected with three pins of the optical coupler OP1, one end of the reset switch S1 is connected with the rectification filtering voltage stabilizing circuit, and the other end of the reset switch S1 is connected with the resistor R11.
In the structure, the smoke detection sensor MQ1 initiates signal detection, the resistor R8 is a sampling resistor and provides reference voltage for the smoke detection sensor MQ1, the potentiometer VR1 is used for adjusting the sampling precision of the smoke detection sensor MQ1, the optical coupler OP1 is used for controlling whether a silicon controlled rectifier SCR1 on the fault alarm circuit module is conducted or not, other resistors play a current limiting role, and the capacitor plays an anti-interference role.
As a further configuration of the utility model, the power indication circuit module includes light emitting diode LED1 and resistance R6, and the power indication circuit is connected with opto-coupler OP 1's input side.
In the structure, the power supply indicating circuit module is used for indicating that the working power supply of the smoke detection sensor MQ1 is normal, the resistor R6 is a current-limiting resistor, and when the power supply is normal, the light-emitting diode LED1 emits light.
As a further setting of the utility model, be connected with resistance R12 between the control pole of silicon controlled rectifier SCR1 and opto-coupler OP 1's the tripod, still be connected with electric capacity C14 on silicon controlled rectifier SCR 1's the control pole, electric capacity C14's other end ground connection.
In the structure, the controlled silicon SCR1 is used for controlling the relay K1 to be conducted and the fault indicator light LED2 to be bright, the three-pin control controlled silicon SCR1 of the optocoupler OP1 is used as a control pin, the resistor R12 is a current-limiting resistor, and the capacitor C14 plays an anti-interference role and prevents misconduction.
As a further setting of the utility model, the RC voltage reduction circuit includes resistance R10 and electric capacity C9, rectification filtering voltage stabilizing circuit includes rectifier bridge DB1, stabilivolt Z2, electric capacity C10, electric capacity C11, three-terminal stabilivolt Z3, electric capacity C12 and electric capacity C13.
In the structure, the resistor R10 and the capacitor C9 form an RC voltage reduction circuit, the RC voltage reduction circuit is changed into direct current through a rectifier bridge DB1, the direct current is changed into DC24V direct current through a voltage regulator tube Z2, the direct current is filtered through the capacitor C10 and the capacitor C11, 24V is changed into 12V through a three-terminal voltage regulator tube Z3, and the capacitor C12 and the capacitor C13 play a role in filtering.
As a further setting of the utility model, the power supply circuit module includes rectification filter circuit, the whole circuit that swings, steady voltage output circuit, overcurrent protection circuit and voltage output circuit.
As a further setting of the utility model, the rectification filter circuit includes rectifier diode D1 and electric capacity C1, the circuit is swung in order and is included resistance R2, triode Q1, coil L1, feedback coil L2, electric capacity C4 and resistance R5, steady voltage output circuit includes stabilivolt Z1, diode D4 and electric capacity C3.
In the above structure, the rectifying and filtering circuit belongs to a half-wave rectifying circuit, outputs pulsating direct current voltage, and becomes direct current voltage through capacitance filtering, and the rectifying and filtering circuit is a magnetic field for forming changes in the switching transformer, thereby generating induced voltage in the secondary winding, and the diode D4 is switched on when the triode Q1 is cut off: the positive pole of the feedback coil L2, the positive pole of the capacitor C3 and the positive pole of the diode D4 form a loop; the voltage of the capacitor C3 is up + down-, voltage-6 v, the upper end is connected with the ground potential 0v, the lower end potential-6 v is a sampling voltage, the voltage regulator tube Z1 is required to be conducted, the left end potential of the voltage regulator tube Z1 is 0.2v, when the voltage is increased, the voltage of the capacitor C3 is increased, namely the lower end potential is lower than-6 v, the voltage of the two ends of the voltage regulator tube Z1 is unchanged, so the left end potential is pulled down to be lower than 0.2v, the base potential of the triode Q1 is pulled down, the saturation time of the triode Q1 is shortened, and the voltage-stabilizing output effect is achieved.
As a further configuration of the present invention, the over-current protection circuit includes a transistor Q2, a diode D3, and a current sampling resistor R4.
In the structure, when the current of the triode Q1 is larger than 0.16A, the current is changed into voltage through the current sampling resistor R4, and the voltage is added to the base electrode of the triode Q2 to be conducted after passing through the diode D3, so that the base electrode voltage of the triode Q1 is pulled down, the collector current is reduced, the current of the triode Q1 is limited, the current is prevented from being burnt due to overlarge current, and the overcurrent protection effect is achieved.
As a further configuration of the present invention, the voltage output circuit includes a rectifier diode D5 and a filter capacitor C5.
In the structure, after rectification by the rectifier diode D5 and filtering by the filter capacitor C5, direct current power supply is provided for the following circuit.
As a further arrangement of the present invention, the power supply device further comprises a tripping module, wherein the tripping module comprises a tripper TQ 1.
In the structure, the tripper TQ1 is used for playing the role of pulling and tripping the circuit breaker together with the circuit breaker mechanism to trip the circuit breaker.
By adopting the structure, when the circuit breaker causes circuit burning due to overload or loose wiring and the like, the overload current multiple does not reach the overload multiple of the circuit breaker, the circuit breaker can not trip to cut off a power supply or give an alarm, at the moment, the circuit is electrified, so that the fault is aggravated and a user does not know that the circuit has a fault and can not process the circuit fault in time, and the fault is aggravated to form larger damage and property loss.
The present invention will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a circuit diagram of a power circuit module according to an embodiment of the present invention;
fig. 2 is a circuit diagram of the fault signal acquisition module, the processing circuit module and the trigger circuit module according to the embodiment of the present invention;
fig. 3 is a circuit diagram of the fault alarm circuit module according to the embodiment of the present invention.
Detailed Description
The utility model discloses a concrete embodiment is shown in fig. 1-3, a load firing alarm circuit, including power supply circuit module, trouble signal acquisition module, processing circuit module, trigger circuit module, power indication circuit module and trouble alarm circuit module, trouble signal acquisition module includes smog detection sensor MQ1, and power supply circuit module supplies power for smog detection sensor MQ1, processing circuit module includes resistance R8, resistance R9, electric capacity C8, potentiometre VR1, signal processing chip U1, and smog detection sensor MQ 1's 4 feet and 6 feet are connected on signal processing chip U1's 6 feet, and resistance R8 and electric capacity C8's one end are connected on signal processing chip U1's 6 feet, and other end ground connection, and resistance R9's one end is connected on smog detection sensor MQ 1's 5 feet, and the other end butt, trigger circuit module includes opto-coupler 1 OP 83, MQ1, The fault alarm circuit module comprises an RC voltage reduction circuit, a rectification filtering voltage stabilizing circuit, a reset switch S1, a fault indicator light LED2, a current limiting resistor R11, a relay K1 and an SCR1, wherein the common end of the resistor R7 and the capacitor C7 is connected to a pin 7 of a signal processing chip U1, the current limiting resistor R11 and the fault indicator light LED2 are connected in series and then connected in parallel with a relay K1, the anode of the SCR1 is connected with the fault indicator light LED1, the control pole is connected with a tripod of the optical coupler OP1, one end of the reset switch S1 is connected with the rectification filtering voltage stabilizing circuit, and the other end of the reset switch S1 is connected with the resistor R1. The smoke detection sensor MQ1 initiates signal detection, the resistor R8 is a sampling resistor and provides reference voltage for the smoke detection sensor MQ1, the potentiometer VR1 is used for adjusting the sampling precision of the smoke detection sensor MQ1, the optocoupler OP1 is used for controlling whether a silicon controlled rectifier SCR1 on the fault alarm circuit module is conducted or not, other resistors play a current limiting role, and the capacitor plays an anti-interference role.
The power indication circuit module comprises a Light Emitting Diode (LED) 1 and a resistor R6, and the power indication circuit is connected with the input side of an optical coupler OP 1. The power supply indicating circuit module is used for indicating that the working power supply of the smoke detection sensor MQ1 is normal, the resistor R6 is a current-limiting resistor, and when the power supply is normal, the light-emitting diode LED1 emits light.
A resistor R12 is connected between the control electrode of the controlled silicon SCR1 and the three pins of the optocoupler OP1, a capacitor C14 is also connected to the control electrode of the controlled silicon SCR1, and the other end of the capacitor C14 is grounded. Silicon controlled rectifier SCR1 is used for controlling relay K1 to switch on and fault indicator LED2 is bright, and the tripod control silicon controlled rectifier SCR 1's of opto-coupler OP1 control foot, and resistance R12 is the current-limiting resistor, and electric capacity C14 plays the anti-jamming effect, prevents the misconnection.
The RC voltage reduction circuit comprises a resistor R10 and a capacitor C9, and the rectification, filtering and voltage stabilizing circuit comprises a rectifier bridge DB1, a voltage regulator tube Z2, a capacitor C10, a capacitor C11, a three-terminal voltage regulator tube Z3, a capacitor C12 and a capacitor C13. The resistor R10 and the capacitor C9 form an RC voltage reduction circuit, the RC voltage reduction circuit is changed into direct current through a rectifier bridge DB1, the direct current is changed into DC24V direct current through a voltage regulator tube Z2, the direct current is filtered through a capacitor C10 and a capacitor C11, 24V is changed into 12V through a three-terminal voltage regulator tube Z3, and the capacitor C12 and the capacitor C13 play a role in filtering.
The power circuit module comprises a rectification filter circuit, an oscillating circuit, a voltage stabilizing output circuit, an overcurrent protection circuit and a voltage output circuit.
The rectification filter circuit comprises a rectifier diode D1 and a capacitor C1, the rectification filter circuit comprises a resistor R2, a triode Q1, a coil L1, a feedback coil L2, a capacitor C4 and a resistor R5, and the voltage stabilizing output circuit comprises a voltage stabilizing tube Z1, a diode D4 and a capacitor C3. Rectifier filter circuit belongs to half-wave rectifier circuit, and output pulse direct current voltage becomes direct current voltage through capacitance filtering, and the circuit of making an uproar is for forming the magnetic field of change among the switching transformer to produce induced voltage in secondary winding, diode D4 switches on when triode Q1 ends: the positive pole of the feedback coil L2, the positive pole of the capacitor C3 and the positive pole of the diode D4 form a loop; the voltage of the capacitor C3 is up + down-, voltage-6 v, the upper end is connected with the ground potential 0v, the lower end potential-6 v is a sampling voltage, the voltage regulator tube Z1 is required to be conducted, the left end potential of the voltage regulator tube Z1 is 0.2v, when the voltage is increased, the voltage of the capacitor C3 is increased, namely the lower end potential is lower than-6 v, the voltage of the two ends of the voltage regulator tube Z1 is unchanged, so the left end potential is pulled down to be lower than 0.2v, the base potential of the triode Q1 is pulled down, the saturation time of the triode Q1 is shortened, and the voltage-stabilizing output effect is achieved.
The overcurrent protection circuit comprises a transistor Q2, a diode D3 and a current sampling resistor R4. When the current of the triode Q1 is larger than 0.16A, the current is changed into voltage through the current sampling resistor R4, and the voltage is added to the base electrode of the triode Q2 to be conducted after passing through the diode D3, so that the base electrode voltage of the triode Q1 is pulled down, the collector current is reduced, the current of the triode Q1 is limited, the current is prevented from being burnt due to overlarge current, and the overcurrent protection effect is achieved.
The voltage output circuit comprises a rectifying diode D5 and a filter capacitor C5. After being rectified by a rectifying diode D5 and filtered by a filter capacitor C5, the direct current power supply is provided for a following circuit.
A trip module is also included, including a trip TQ 1. The tripper TQ1 is used for pulling and tripping the breaker in cooperation with the breaker mechanism to trip the breaker.
The circuit principle is as follows: the 230V alternating current is subjected to half-wave rectification through a diode D1, after C1 is filtered, the alternating current is transformed through a T1 high-frequency transformer to provide a required power supply for MQ1, when the alternating current is normal, the conductivities of pins 1 and 3 and pins 4 and 6 of the MQ1 are very low and are in a high-resistance state, the pin U1_6 is at a low level, the pin U1_7 outputs a high level at the moment, an optical coupler OP1 is not conducted, the controlled electrode of a silicon controlled rectifier is at a low level and is not conducted, a coil of a relay K1 is not. The tripper is not moved, when the circuit is ignited and burnt due to overload or loose wiring and the like, after the MQ1 detects a fault signal, the resistance values of pins 1, 3 and 4 and 6 of the MQ1 become small, the high level of the pin U1_6 is realized, the low level is output by the pin U1_7 at the moment, the optical coupler OP1 is conducted, the control electrode of the silicon controlled rectifier is conducted by conducting OP1_4 and OP1_3 at the moment, the silicon controlled rectifier is conducted, the coil of the relay K1 is electrified to act, the normally open contact is closed, the normally closed contact is opened, the tripper TQ is electrified, the circuit breaker is tripped (can not trip and outputs an alarm signal), the indicating lamp is turned on to tell a user that the fault is eliminated as soon as possible, and when the user knows the fault, the alarm device.
The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.
Claims (9)
1. A load fire alarm circuit, characterized by: the smoke detection circuit comprises a power supply circuit module, a fault signal acquisition module, a processing circuit module, a trigger circuit module, a power supply indicating circuit module and a fault alarm circuit module, wherein the fault signal acquisition module comprises a smoke detection sensor MQ1, the power supply circuit module supplies power to the smoke detection sensor MQ1, the processing circuit module comprises a resistor R8, a resistor R9, a capacitor C8, a potentiometer VR1 and a signal processing chip U1, pins 4 and 6 of the smoke detection sensor MQ1 are connected to pins 6 of the signal processing chip U1, one ends of the resistor R8 and the capacitor C8 are connected to the pin 6 of the signal processing chip U1, the other end of the resistor R9 is grounded, one end of the resistor R9 is connected to the pin 5 of the smoke detection sensor MQ1, the other end of the resistor R9 is connected in an abutting joint, the trigger circuit module comprises an optical coupler OP1, a resistor R7, a capacitor C6 and a capacitor C7, the capacitor C6 is connected to the input side of an optical coupler OP1 in parallel, the resistor, the other end of the capacitor C7 is grounded, the common end of the resistor R7 and the capacitor C7 is connected to the pin 7 of the signal processing chip U1, the fault alarm circuit module comprises an RC voltage reduction circuit, a rectification filtering voltage stabilizing circuit, a reset switch S1, a fault indicator light LED2, a current limiting resistor R11, a relay K1 and a silicon controlled rectifier SCR1, the current limiting resistor R11 and the fault indicator light LED2 are connected in series and then connected in parallel with the relay K1, the anode of the silicon controlled rectifier SCR1 is connected with the fault indicator light LED2, the control electrode is connected with the three pins of the optical coupler OP1, one end of the reset switch S1 is connected with the rectification filtering voltage stabilizing circuit, and the other end is connected with the resistor.
2. The load fire alarm circuit of claim 1, wherein: the power indication circuit module comprises a Light Emitting Diode (LED) 1 and a resistor R6, and the power indication circuit is connected with the input side of an optical coupler OP 1.
3. The load fire alarm circuit according to claim 1 or 2, wherein: a resistor R12 is connected between the control electrode of the controlled silicon SCR1 and the three pins of the optocoupler OP1, a capacitor C14 is also connected to the control electrode of the controlled silicon SCR1, and the other end of the capacitor C14 is grounded.
4. The load fire alarm circuit of claim 3, wherein: the RC voltage reduction circuit comprises a resistor R10 and a capacitor C9, and the rectification filtering voltage stabilizing circuit comprises a rectifier bridge DB1, a voltage regulator tube Z2, a capacitor C10, a capacitor C11, a three-terminal voltage regulator tube Z3, a capacitor C12 and a capacitor C13.
5. The load fire alarm circuit of claim 3, wherein: the power circuit module comprises a rectification filter circuit, an oscillating circuit, a voltage stabilizing output circuit, an overcurrent protection circuit and a voltage output circuit.
6. The load fire alarm circuit of claim 5, wherein: the rectification filter circuit comprises a rectifier diode D1 and a capacitor C1, the rectification filter circuit comprises a resistor R2, a triode Q1, a coil L1, a feedback coil L2, a capacitor C4 and a resistor R5, and the voltage-stabilizing output circuit comprises a voltage-stabilizing tube Z1, a diode D4 and a capacitor C3.
7. The load fire alarm circuit of claim 5, wherein: the overcurrent protection circuit comprises a triode Q2, a diode D3 and a current sampling resistor R4.
8. The load fire alarm circuit of claim 5, wherein: the voltage output circuit comprises a rectifying diode D5 and a filter capacitor C5.
9. The load fire alarm circuit according to any one of claims 4-8, wherein: a trip module is also included, including a trip TQ 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635613.7U CN210605978U (en) | 2019-09-27 | 2019-09-27 | Load fire alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635613.7U CN210605978U (en) | 2019-09-27 | 2019-09-27 | Load fire alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210605978U true CN210605978U (en) | 2020-05-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921635613.7U Withdrawn - After Issue CN210605978U (en) | 2019-09-27 | 2019-09-27 | Load fire alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210605978U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706428A (en) * | 2019-09-27 | 2020-01-17 | 德力西电气有限公司 | Load fire alarm circuit |
-
2019
- 2019-09-27 CN CN201921635613.7U patent/CN210605978U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706428A (en) * | 2019-09-27 | 2020-01-17 | 德力西电气有限公司 | Load fire alarm circuit |
| CN110706428B (en) * | 2019-09-27 | 2024-06-14 | 德力西电气有限公司 | Load ignition alarm circuit |
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Granted publication date: 20200522 Effective date of abandoning: 20240614 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200522 Effective date of abandoning: 20240614 |
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