CN205048473U - Automatic control flame out protection device - Google Patents

Abstract

The utility model discloses an automatic control flame out protection device, including sensing pin, furnace end, drain pan, establish on gas fuel passag the solenoid valve and for the solenoid valve provides driving voltage's power supply battery, still include voltage detection unit and alarm unit, this voltage detection unit is used for detecting power supply battery's voltage to output detection signal when power supply battery's voltage is less than reference voltage, this alarm unit in response to this detected signal in order cutting off gas fuel passag, and report to the police. The utility model discloses an automatic control flame out protection device has following advantage: gas fuel passag can close when power supply battery's brownout to the suggestion staff reports to the police.

Description

Automatic control flame-out protection device

Technical field

The utility model relates to one and automatically controls flame-out protection device.

Background technology

Flame-out protection device, the boiler of coal dust burning, oil or fuel gas successively carries out by certain program when flame-out, to ensure the device of boiler safety.Its key component is made up of ultraviolet phototube (electric eye) and flame eye.Work as boiler flameout, when electric eye does not observe flame, monitor exports misfire signals immediately, handles relay, makes it the supply of instantaneous trip fuel.

Flame-out protection device comparatively common on the market adopts thermocouple to add magnetic valve to realize at present, and its specific works principle is as follows: rely on knob band moving electromagnetic valve to open, the thermoelectrical potential relying on thermocouple to produce keeps the opening of magnetic valve; When fray-out of flame, thermocouple loses thermoelectrical potential, magnetic valve synchronous release, and fuel gas path is cut off, to complete blowout protection.

But the defect of this technology is thermocouple is easy to aging, and along with the growth of service time, thermocouple is aging, the thermoelectrical potential of generation is not enough to the adhesive maintaining magnetic valve, so fire has just gone out.

For overcoming above-mentioned problem, existing a kind of ion stops working technology, and it is the complete battery-operated flame-out mechanism be based upon in conducting flame principle.When lifting knob, pulse igniter discharges, simultaneously magnetic valve quick pick-up, and fuel gas path is opened, and combustion gas enters combustion chamber and completes igniting.During flame combustion, the micro-electric current being additional to inductive needle forms loop by flame, burner, drain pan, and pulser continues to magnetic valve transmission " maintenance " order, and combustion gas is continued supply.If fray-out of flame, backfeed loop interrupts, and magnetic valve discharges immediately, and fuel gas path is cut off.Ion induction technology is used for infrared ray stove, and it needs two batteries to drive magnetic valve usually.Relative to the former, there is not problem of aging in ion induction technology comparative maturity substantially.

But, ion technology of stopping working is very large to the consumption of battery, in use, battery often cannot normal power supply because of brownout, magnetic valve can not get enough driving voltages and cannot action, namely there is fray-out of flame and situation that fuel gas path is not cut off, if now user not cut off blast tube consequence in time hardly imaginable.

Utility model content

For the deficiency that prior art exists, the purpose of this utility model is to provide one automatically to control flame-out protection device, can close blast tube when the brownout of supplying cell, and alarm staff.

For achieving the above object, the invention provides following technical scheme: one controls flame-out protection device automatically, comprise inductive needle, burner, drain pan, be located at magnetic valve on blast tube and provide the supplying cell of driving voltage for magnetic valve, also comprise,

Voltage detection unit, for detecting the voltage of supplying cell, and when the voltage of supplying cell is less than reference voltage output detections signal;

Alarm unit, in response to this detection signal to cut off blast tube, and reports to the police.

The utility model is set to further: described voltage detection unit comprises,

Reference voltage generation unit, for exporting this reference voltage;

Comparing unit, for receiving voltage and this reference voltage of this supplying cell, and exports this detection signal when the voltage of supplying cell is less than reference voltage.

The utility model is set to further: described reference voltage generation unit comprise be connected to successively VCC end with GND end between the first resistance and the second resistance, wherein, the common port of the first resistance and the second resistance exports this reference voltage.

The utility model is set to further: at least one in described first resistance and the second resistance is adjustable resistance.

The utility model is set to further: described comparing unit comprises,

Comparator, the in-phase input end of described comparator is coupled to this reference voltage, and the inverting input of described comparator is coupled to the voltage of this supplying cell, and the output of described comparator is for exporting this detection signal.

The utility model is set to further: described alarm unit comprises,

First enforcement division, in response to this detection signal to cut off blast tube;

Second enforcement division; In response to this detection signal to report to the police.

The utility model is set to further: described first enforcement division comprises,

First switch, has a control end also disconnected in response to this detection signal;

Perform magnetic valve, be located on blast tube, connect with the first switch.

The utility model is set to further: described first switch is NMOS tube or PNP triode.

The utility model is set to further: described second enforcement division comprises,

Second switch, has one in response to this detection signal and the control end of conducting;

Indicator lamp, connects with second switch;

Buzzer, connects with second switch.

The utility model is set to further: described second switch is PMOS or NPN triode.

By adopting technique scheme, automatic control flame-out protection device of the present utility model, there is voltage detection unit and alarm unit, wherein, a reference voltage generation unit be specifically designed to as voltage detection unit is needed to provide the calibration battery of supply voltage, reference voltage is obtained by this calibration battery and reference voltage generation unit, compare with the voltage of supplying cell, when the voltage of supplying cell is less than this reference voltage, voltage detection unit exports the detection signal controlling alarm unit action, alarm unit can cut off blast tube and prompting user.

Compared to prior art, automatic control flame-out protection device of the present utility model has following advantage: can close blast tube when the brownout of supplying cell, and alarm staff.

Accompanying drawing explanation

Fig. 1 is the simple view that the utility model controls flame-out protection device automatically;

Fig. 2 is the circuit diagram of the utility model voltage detection unit;

Fig. 3 is the circuit diagram of the utility model alarm unit;

Fig. 4 is the circuit diagram of reference voltage generation unit in Fig. 2;

Fig. 5 is the circuit diagram of comparing unit in Fig. 2;

Fig. 6 is the circuit diagram of the first enforcement division in Fig. 3;

Fig. 7 is the circuit diagram of the second enforcement division in Fig. 3.

Reference numeral: 1, inductive needle; 2, burner; 3, blast tube; YV1, magnetic valve; 100, voltage detection unit; 110, reference voltage generation unit; 120, comparing unit; 200, alarm unit; 210, the first enforcement division; 220, the second enforcement division.

Detailed description of the invention

Referring to figs. 1 through Fig. 7, the embodiment that the utility model controls flame-out protection device is automatically described further.

With reference to Fig. 1; automatically flame-out protection device is controlled in the present embodiment; its mechanical part can comprise inductive needle 1, burner 2, drain pan (not shown), blast tube 3, magnetic valve (not shown) and supplying cell; wherein; inductive needle 1 is arranged near burner 2, and drain pan is positioned at the bottom of burner 2, and magnetic valve is arranged on blast tube 3; for opening or close blast tube 3, supplying cell is electrically connected with magnetic valve and is used for for solenoid valve.

When flame combustion on burner 2, inductive needle 1, burner 2, drain pan form loop, and solenoid control blast tube 3 is opened, and Hood normally uses; During fray-out of flame on burner 2, the loop of inductive needle 1, burner 2, drain pan disconnects, and solenoid control blast tube 3 is closed, and Hood is stopped using.

With reference to Fig. 2 to Fig. 3, automatically flame-out protection device is controlled in the present embodiment, its electric part can comprise voltage detection unit 100 and alarm unit 200, voltage detection unit 100 and alarm unit 200 couple, particularly, voltage detection unit 100 for detecting the voltage of supplying cell, and when the voltage of supplying cell is less than reference voltage output detections signal ch1; Alarm unit 200, and to be reported to the police to cut off blast tube in response to this detection signal ch1.

That is, voltage detection unit 100 is connected by detection signal ch1 with alarm unit 200.About voltage detection unit 100 and alarm unit 200, annexation and operation principle will describe one by one following particularly.

With reference to Fig. 4 to Fig. 5, in the present embodiment, voltage detection unit 100 comprises reference voltage generation unit 110 and comparing unit 120, wherein, reference voltage generation unit 110 for receiving voltage V1 and this reference voltage Vref of this supplying cell, and exports this detection signal ch1 when the voltage V1 of supplying cell is less than reference voltage Vref; Comparing unit 120 for receiving voltage V1 and this reference voltage Vref of this supplying cell, and exports this detection signal ch1 when the voltage V1 of supplying cell is less than reference voltage Vref.

Particularly, with reference to Fig. 4, reference voltage generation unit 110 comprises resistance R1 and resistance R2, wherein one end of resistance R1 is coupled to VCC end, and the other end of resistance R1 is coupled to resistance R2, and one end of resistance R2 is coupled to resistance R1, the other end of resistance R2 is coupled to GND end, the common port of resistance R1 and resistance R2 exports this reference voltage Vref, and VCC end herein and GND end are the both positive and negative polarity of a calibration battery, and this calibration battery is different from supplying cell.

Particularly, with reference to Fig. 5, comparing unit 120 comprises resistance R3, supplying cell BT1, comparator A and resistance R5, wherein, the in-phase input end of comparator A is coupled to reference voltage Vref by resistance R3, the inverting input of comparator A is coupled to the positive pole of supplying cell BT1, and the output of comparator exports this detection signal ch1 by resistance R5.

Above operation principle is: when the voltage of comparator A1 in-phase input end is greater than its reverse input end, and comparator A1 exports the detection signal ch1 of high level; When the voltage of comparator A1 in-phase input end is less than its reverse input end, the signal of comparator A1 output low level.That is, when the amplitude of reference voltage Vref is greater than the voltage V1 of supplying cell, comparator A1 exports the detection signal ch1 of high level.

With reference to Fig. 6 to Fig. 7, in the present embodiment, alarm unit 200 comprises the first enforcement division 210 and the second enforcement division 220, wherein the first enforcement division 210 in response to this detection signal ch1 to cut off blast tube 3; Second enforcement division 220 in response to this detection signal ch1 with report to the police.

Particularly, with reference to Fig. 6, in the present embodiment, the first enforcement division 210 comprises switch S 1, resistance R6 and magnetic valve YV1, the grid of switch S 1 is coupled to this detection signal ch1, the source electrode of switch S 1 is by resistance R6 ground connection, the drain electrode of switch S 1 is coupled to the coil of magnetic valve YV1, and the coil of magnetic valve YV1 is also coupled to voltage V1.

Particularly, with reference to Fig. 7, in the present embodiment, the second enforcement division 220 comprises switch S 2, resistance R7, indicator lamp LED1 and loudspeaker SP1, the grid of switch S 2 is coupled to this detection signal ch1, the source electrode of switch S 1 is by resistance R7 ground connection, and the drain electrode of switch S 1 is coupled to the negative electrode of indicator lamp LED1, and the anode of indicator lamp LED1 is coupled to voltage V1, the drain electrode of switch S 1 is also coupled to one end of loudspeaker SP1, and the other end of loudspeaker SP1 is coupled to voltage V1.

Above operation principle is: switch S 1 disconnects in response to this detection signal ch1, and make magnetic valve YV1 control blast tube 3 and close, Simultaneous Switching S2, in response to this detection signal ch1 conducting, makes indicator lamp LED1 and buzzer SP1 ON operation.

The above is only preferred embodiment of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (10)

1. automatically control a flame-out protection device, comprise inductive needle, burner, drain pan, be located at magnetic valve on blast tube and provide the supplying cell of driving voltage for magnetic valve, it is characterized in that: also comprise,

Voltage detection unit, for detecting the voltage of supplying cell, and when the voltage of supplying cell is less than reference voltage output detections signal;

Alarm unit, in response to this detection signal to cut off blast tube, and reports to the police.

2. automatic control flame-out protection device according to claim 1, is characterized in that: described voltage detection unit comprises,

Reference voltage generation unit, for exporting this reference voltage;

Comparing unit, for receiving voltage and this reference voltage of this supplying cell, and exports this detection signal when the voltage of supplying cell is less than reference voltage.

3. automatic control flame-out protection device according to claim 2; it is characterized in that: described reference voltage generation unit comprise be connected to successively VCC end with GND end between the first resistance and the second resistance; wherein, the common port of the first resistance and the second resistance exports this reference voltage.

4. automatic control flame-out protection device according to claim 3, is characterized in that: at least one in described first resistance and the second resistance is adjustable resistance.

5. automatic control flame-out protection device according to claim 4, is characterized in that: described comparing unit comprises,

Comparator, the in-phase input end of described comparator is coupled to this reference voltage, and the inverting input of described comparator is coupled to the voltage of this supplying cell, and the output of described comparator is for exporting this detection signal.

6. automatic control flame-out protection device according to claim 5, is characterized in that: described alarm unit comprises,

First enforcement division, in response to this detection signal to cut off blast tube;

Second enforcement division; In response to this detection signal to report to the police.

7. automatic control flame-out protection device according to claim 6, is characterized in that: described first enforcement division comprises,

First switch, has a control end also disconnected in response to this detection signal;

Perform magnetic valve, be located on blast tube, connect with the first switch.

8. automatic control flame-out protection device according to claim 7, is characterized in that: described first switch is NMOS tube or PNP triode.

9. automatic control flame-out protection device according to claim 6, is characterized in that: described second enforcement division comprises,

Second switch, has one in response to this detection signal and the control end of conducting;

Indicator lamp, connects with second switch;

Buzzer, connects with second switch.

10. automatic control flame-out protection device according to claim 9, is characterized in that: described second switch is PMOS or NPN triode.