CN211260870U

CN211260870U - Flame detection device of boiler equipment

Info

Publication number: CN211260870U
Application number: CN201920662989.0U
Authority: CN
Inventors: 廖柏森
Original assignee: Jinzihao Fujian Combustion Equipment Co ltd
Current assignee: Jinzihao Fujian Combustion Equipment Co ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-08-14
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a boiler equipment flame detection device belongs to boiler equipment technical field, has solved flame and has detected the reliability problem, and its technical scheme main points are including flame ion probe, live wire end, earthing terminal, a plurality of resistance device, a plurality of capacitance device, diode device, first chip and singlechip, adopt the characteristic of flame ion probe, and circuit structure, have reached the high efficiency, the effect of reliable detection.

Description

Flame detection device of boiler equipment

Technical Field

The utility model relates to a boiler equipment field especially relates to a boiler equipment flame detection device.

Background

At present, Chinese patent with application number 201410176593.7 on the market discloses a boiler flame detection device, which comprises a power supply, wherein the power supply is connected with two circuits in parallel, a bidirectional thyristor is arranged in a first circuit, a photosensitive resistor, a resistor and a capacitor are connected in series in a second circuit, the resistor and the capacitor are connected with one end of a bidirectional trigger diode, the other end of the bidirectional trigger diode is communicated with the bidirectional thyristor, one end of the first circuit and one end of the second circuit are jointly connected with a relay coil, and the relay coil is communicated with the power supply. Although the circuit structure can play a role in protecting components, the detection work of flame is not reliable, and due to the fact that the photoresistor is used for sensing the flame, the flame is interfered by an external light source, and misjudgment and misdetection are caused.

Further sophistication is needed for the structure of flame detection.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. In view of this, the utility model aims at providing a boiler equipment flame detection device has high-efficient reliable advantage.

In order to solve the technical problem, the technical scheme of the utility model is that: a flame detection device of boiler equipment comprises a flame ion probe, a fire wire end, a grounding end, a plurality of resistance devices, a plurality of capacitance devices, a diode device, a first chip and a singlechip, the flame ion probe is connected with a power supply Vcc sequentially through resistors R11, R12, R13, R14 and R15, a fire wire end is connected with a connection point between a resistor R12 and a resistor R13 through a capacitor C13, the connection point between the resistor R13 and the resistor R14 is connected with a diode D1, a resistor R16, a ground terminal and a fourth pin of the first chip sequentially through a forward connection, the connection point between the resistor R13 and the resistor R14 is further connected with the ground terminal through a capacitor C11, the connection point between the resistor R14 and the resistor R15 is connected with the ground terminal through a capacitor C12, the capacitor C12 is further connected with the sixth pin and the fifth pin of the first chip in parallel, the seventh pin of the first chip is connected with one end of a resistor R17 and the single chip, and the other end of the resistor R17 is connected with the power supply Vcc.

As a specific aspect of the present invention, it may be preferable that: the model of the first chip is LM 358M.

As a specific aspect of the present invention, it may be preferable that: the capacitance values of the capacitors C13 and C11 are 10nF, and the withstand voltage value is 400V.

As a specific aspect of the present invention, it may be preferable that: the power supply Vcc is also connected with a voltage stabilizing part and a voltage follower, the voltage stabilizing part is used for providing Vcc voltage, and the voltage follower is connected between the output end of the voltage stabilizing part and the single chip microcomputer and is used for providing a detection signal to the single chip microcomputer.

As a specific aspect of the present invention, it may be preferable that: the capacitors C13 and C11 are adjustable capacitors.

The utility model discloses technical effect mainly embodies in following aspect: the 220V alternating voltage is connected to the flame ion probe through a capacitor C13, a resistor R12 and a resistor R11 by a lead, and when gas is ignited, a charging voltage with a lower positive and an upper negative is formed on the capacitor C11 by rectifying the alternating current by utilizing the diode characteristic of the flame ion probe. The negative voltage at the upper end of the C11 is applied to the sixth pin of the first chip through the R14, so that the voltage at the negative end is lower than that at the positive end, and the seventh pin of the first chip outputs high level. The high level signal is sent to the pin of the singlechip.

When the gas is extinguished or the ion probe is short-circuited to the shell, the voltage of the sixth pin of the first chip is higher than that of the fifth pin of the first chip due to the action of R15. The seventh pin of the first chip outputs a low level. The low level signal is sent to the pin of the singlechip. Therefore, the singlechip can judge whether the flame exists or not by detecting the level. The flame detection reliability is better.

Because the power supply Vcc is needed to supply power, and the power supply Vcc needs to be stable and kept unchanged to improve the reliability of checking and judging, the voltage needs to be checked and detected, and the voltage stabilizing part and the voltage follower are used for monitoring the voltage Vcc.

Drawings

FIG. 1 is a circuit diagram of the structure of an embodiment;

fig. 2 is a circuit connection diagram of the voltage stabilizing part and the voltage follower in the embodiment.

Reference numerals: 1. a flame ion probe; 2. a fire wire end; 3. a ground terminal; 4. a first chip; 5. a single chip microcomputer; 6. a voltage stabilizing part; 7. a voltage follower.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention so that the technical solution of the present invention can be more easily understood and grasped, and should not be construed as limiting the present invention.

Example (b):

referring to fig. 1, the flame detection device for boiler equipment includes a flame ion probe 1, a fire wire end 2, a ground end 3, a plurality of resistance devices, a plurality of capacitance devices, a diode device, a first chip 4, and a single chip microcomputer 5. The fire wire end 2 obtains 220V voltage of the commercial power. The plurality of resistance devices, the plurality of capacitance devices, and the diode device are referred to as resistances R11, R12, R13, R14, R15, R16, R17, R1, R2, R3, and R4 in this embodiment. The capacitor devices are capacitors C11, C12, C13 and C1. The diode device is a diode D1. In fig. 2, the voltage follower 7 is also referred to, and the main structure adopted is a chip TL3472IDR, and the voltage regulator section 6 designs a chip TL 341B.

The flame ion probe 1 is connected with a power supply Vcc sequentially through resistors R11, R12, R13, R14 and R15, a live wire end 2 is connected with a connection point between a resistor R12 and a resistor R13 through a capacitor C13, a connection point between the resistor R13 and a resistor R14 is connected with a diode D1, a resistor R16, a ground terminal 3 and a fourth pin of the first chip 4 sequentially through a forward-direction connection, a connection point between the resistor R13 and the resistor R14 is further connected with the ground terminal 3 through a capacitor C11, a connection point between the resistor R14 and the resistor R15 is connected with the ground terminal 3 through a capacitor C12, a capacitor C12 is further connected in parallel with the sixth pin and the fifth pin of the first chip 4, a seventh pin of the first chip 4 is connected with one end of the resistor R17 and the single chip 5, and the other end of the resistor R17 is connected with the power. The first chip 4 is of the model LM 358M. The first chip 4 has two comparators integrated therein, one of which is used in the present circuit diagram.

The capacitors C13 and C11 have a capacitance of 10nF and a withstand voltage of 400V. The capacitances C13 and C11 are tunable capacitors. Therefore, the charging and discharging time of the capacitors C13 and C11 can be adjusted, and debugging is facilitated.

The power supply Vcc is also connected with a voltage stabilizing part 6 and a voltage follower 7, the voltage stabilizing part 6 is used for providing Vcc voltage, and the voltage follower 7 is connected between the output end of the voltage stabilizing part 6 and the singlechip 5 and is used for providing detection signals for the singlechip 5.

The voltage stabilizing unit 6 is used for converting a power voltage to output a reference voltage Vcc, and the voltage stabilizing unit 6 includes a three-terminal regulator (a chip TL431B) and a first resistor R1, where the three-terminal regulator adopts a TL431 chip and a power supply terminal thereof is connected to a power supply voltage through the first resistor R1. The power Vcc outputs 1.65V through the three-terminal regulator 41U3 after passing through the first resistor R1, and in this embodiment, the reference power is preferably modulated to 1.65V, and is modulated through the second resistor R2 and the third resistor R3. The following voltage of 1.65V is output through the voltage follower 7.

The voltage follower 7 receives the reference voltage and outputs a follow voltage, the in-phase end of the voltage follower 7 is connected with the output end of the three-terminal voltage regulator through a second resistor R2, the in-phase end is grounded through a third resistor R3, and a fourth resistor R4 and a first capacitor C1 are connected between the output end of the voltage follower 7 and the ground end 3 in parallel. The first capacitor C1 can act as a voltage regulator to remove ripple interference. The output voltage of the voltage follower 7 is then supplied to the single chip 5. If the Vcc power supply is unstable and fluctuates violently, the single chip microcomputer 5 can effectively detect the unstable Vcc power supply and can find that the unstable Vcc power supply affects the signal output by flame detection.

The working process is as follows: the 220V alternating voltage is connected to the flame ion probe 1 through a lead after passing through a capacitor C13 and resistors R12 and R11, and after the gas is ignited, a charging voltage with a lower positive and an upper negative is formed on the capacitor C11 by rectifying the alternating current by utilizing the diode characteristic of the flame ion probe 1. The negative voltage at the upper end of C11 is applied to the sixth pin of the first chip 4 through R14, so that the negative voltage is lower than the positive voltage, and the seventh pin of the first chip 4 outputs high level. The high level signal is sent to the pin of the singlechip 5.

When the gas is extinguished or the ion probe short circuits the chassis, the voltage of the sixth pin of the first chip 4 is higher than that of the fifth pin of the first chip 4 due to the action of R15. The seventh pin of the first chip 4 outputs a low level. The low level signal is then sent to the pin of the singlechip 5. Thus, the singlechip 5 can judge whether the flame exists or not by detecting the level. The flame detection reliability is better.

Since the power supply Vcc is needed to supply power, and the power supply Vcc needs to be stable and kept unchanged to improve the reliability of the checking and judging, the voltage needs to be checked and detected, and the voltage Vcc is monitored by using the voltage stabilizing part 6 and the voltage follower 7.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. A flame detection device of boiler equipment comprises a flame ion probe, a fire wire end, a grounding end, a plurality of resistance devices, a plurality of capacitance devices, a diode device, a first chip and a singlechip, the flame ion probe is characterized in that the flame ion probe is connected with a power supply Vcc sequentially through resistors R11, R12, R13, R14 and R15, a fire wire end is connected with a connection point between a resistor R12 and a resistor R13 through a capacitor C13, the connection point between the resistor R13 and R14 is connected with a diode D1, a resistor R16, a ground terminal and a fourth pin of a first chip sequentially through a forward connection, the connection point between the resistor R13 and the resistor R14 is also connected with the ground terminal through a capacitor C11, the connection point between the resistor R14 and the resistor R15 is connected with the ground terminal through a capacitor C12, the capacitor C12 is further connected in parallel with a sixth pin and a fifth pin of the first chip, a seventh pin of the first chip is connected with one end of a resistor R17 and a single chip, and the other end of the resistor R17 is connected with; the power supply Vcc is also connected with a voltage stabilizing part and a voltage follower, the voltage stabilizing part is used for providing Vcc voltage, and the voltage follower is connected between the output end of the voltage stabilizing part and the single chip microcomputer and is used for providing a detection signal to the single chip microcomputer; the capacitors C13 and C11 are adjustable capacitors.

2. The flame detection device of claim 1, wherein the first chip is of the type LM 358M.

3. The flame detection device of boiler equipment as claimed in claim 1, wherein the capacitance values of the capacitors C13 and C11 are 10nF, and the withstand voltage value is 400V.