CN214067330U - Draught fan fault detection circuit based on network - Google Patents
Draught fan fault detection circuit based on network Download PDFInfo
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- CN214067330U CN214067330U CN202120153665.1U CN202120153665U CN214067330U CN 214067330 U CN214067330 U CN 214067330U CN 202120153665 U CN202120153665 U CN 202120153665U CN 214067330 U CN214067330 U CN 214067330U
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000000428 dust Substances 0.000 claims abstract description 112
- 239000003990 capacitor Substances 0.000 claims description 68
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 9
- 230000001934 delay Effects 0.000 description 3
- 239000012716 precipitator Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 239000012717 electrostatic precipitator Substances 0.000 description 1
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Abstract
The utility model provides a draught fan fault detection circuit based on network, the effectual mode of having solved prior art and relying on artifical clearance dust has caused manpower resources's waste, also influences the problem of the work process of draught fan, the utility model discloses a signal detection circuit utilizes dust sensor U1 to detect the dust concentration signal on the draught fan blade, vibration signal when utilizing vibration sensor U2 to detect draught fan bearing vibration to make dust concentration signal pass through the filtering follower, vibration signal exports respectively to control output circuit behind the enlarged tuner, control output circuit obtains alarm signal through OR the door, alarm signal triggers dust removal control circuit, utilizes signal detection circuit to improve alarm signal and has passed through network transmission to the accuracy of surveillance center.
Description
Technical Field
The utility model relates to a draught fan detection area, especially a draught fan fault detection circuit based on network.
Background
The blower is a short form of habit for gas compression and gas conveying machinery in China, and the blower generally comprises a ventilator, a blower and a boiler induced draft fan. In the actual use process of a boiler induced draft fan, the vibration of a bearing of the boiler induced draft fan is the most common fault in operation, the vibration increase of the bearing of the induced draft fan can cause the faults of damage of the bearing and the blade, looseness of bolts, damage of a shell and a wind channel and the like, the safe operation of the induced draft fan is seriously endangered, and the main reason for causing the vibration increase of the bearing of the induced draft fan is that the excessive accumulation of dust is generated on the non-working area of the blade. The main mode of clearing away the dust among the prior art relies on the manual work to clean after draught fan trouble stops working, but this kind of mode has caused the waste of manpower resources, also influences the course of work of draught fan.
Therefore, the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a draught fan fault detection circuit based on network, the effectual mode of having solved prior art dependence manual work clearance dust has caused manpower resources's waste, also influences the problem of the course of operation of draught fan.
The technical scheme of its solution is, a draught fan fault detection circuit based on network, fault detection circuit includes signal detection circuit and control output circuit, signal detection circuit utilizes dust sensor U1 to detect the dust concentration signal on the draught fan blade, and the vibration signal when utilizing vibration sensor U2 to detect draught fan bearing vibration to make dust concentration signal export respectively to control output circuit after making the filter follower, vibration signal enlarge the tuner, and control output circuit obtains alarm signal through the OR gate, and alarm signal triggers dust removal control circuit.
The signal detection circuit includes dust concentration sensor U1, vibration sensor U2, filtering follower and enlargies the tuner, dust concentration sensor U1 is connected with the one end of filtering follower, and vibration sensor U2 is connected with the one end of enlargiing the tuner, and the dust concentration signal on the draught fan blade that dust concentration sensor U1 detected carries out the filtering and follows the processing through filtering follower circuit, and vibration sensor U2 is then the vibration signal when will detecting draught fan bearing vibration and carries out resonance and amplification processing.
The filter follower comprises a resistor R1 and an operational amplifier U1B, one end of a resistor R1 is connected with an out pin of a dust concentration sensor U1, the other end of the resistor R1 is connected with one end of a resistor R3 and one end of a capacitor C2 respectively, the other end of the resistor R3 is connected with one end of a capacitor C4 and a same-phase end of an operational amplifier U1B respectively, an inverting end of the operational amplifier U1B is connected with one end of a resistor R6 and one end of a resistor R9 respectively, the other end of the resistor R9 is connected with one end of a capacitor C6, the other end of a capacitor C4, the other end of a capacitor C2 and a gnd pin of a dust concentration sensor U822 and is grounded, a VCC pin of a positive power supply VCC is connected, an output end of the operational amplifier U1B is connected with the other end of a resistor R6 and one end of a resistor R13 respectively, and the other end of a resistor R13 is connected with a negative electrode of a voltage regulator D2 and the other end of a capacitor C6 respectively.
The amplification tuner comprises a capacitor C1 and a triode Q1, one end of a capacitor C1 is connected with an out pin of a vibration sensor U2, the other end of the capacitor C1 is respectively connected with one end of a resistor R4, one end of a resistor R5 and a base of a triode Q1, a collector of the triode Q1 is respectively connected with one end of a capacitor C3 and one end of an inductor L1, an emitter of the triode Q1 is connected with one end of the resistor R7, the other end of the resistor R7 is respectively connected with the other end of the resistor R5 and a gnd pin of the vibration sensor U2 and is connected with the ground, the other end of the capacitor C3 is respectively connected with the other end of the inductor L1 and the other end of the resistor R4, and a VCC pin of the vibration sensor U2 is connected with a positive polarity power supply VCC.
The control output circuit comprises an OR gate and a dust removal control circuit, the OR gate is respectively connected with the other end of the filtering follower and the other end of the amplifying tuner, the other end of the OR gate is connected with the dust removal control circuit, or the OR gate obtains an alarm signal through a dust concentration signal and a vibration signal which are respectively output by the filtering follower and the amplifying tuner, and the alarm signal controls the connection of the dust removal control circuit.
The OR gate comprises a diode D1 and a diode D3, the anode of the diode D1 is respectively connected with one end of an inductor L1 of the amplification follower, one end of a capacitor C3 and the collector of a triode Q3, the cathode of the diode D1 is respectively connected with the cathode of the diode D3, one end of a resistor R10 and a network, and the other end of a resistor R10 is respectively connected with the other end of a resistor R9 in the filter follower and the other end of a resistor R7 of the amplification tuner and connected with the ground in parallel.
The dust removal control circuit comprises a triode Q2 and a dust remover, wherein the base electrode of a triode Q2 is connected with the anode of a voltage regulator tube D5, the cathode of the voltage regulator tube D5 is respectively connected with one end of a resistor R12 and one end of a capacitor C5, the other end of a resistor R12 is connected with the cathode of a diode D1 in an OR gate, the cathode of a diode D3, one end of a resistor R10 and a network, the collector electrode of the triode Q2 is respectively connected with the anode of a diode D4 and one end of a resistor R8, the cathode of a diode D4 is connected with the dust remover, the other end of the resistor R8 is connected with a positive polarity power supply VCC, the emitter electrode of the triode Q2 is connected with one end of a resistor R2, and the other end of the resistor R2 is respectively connected with the other end of a capacitor C5 or the other end of a resistor R10 in the gate and grounded.
The utility model discloses a following beneficial effect:
the dust removal control circuit composed of the resistor R12, the capacitor C5, the diode D5, the triode Q2, the diode D4 and the dust removal control circuit composed of the dust remover, the diode D1, the diode D3 and the OR gate composed of the resistor R10 are used for automatically cleaning dust of the induced draft fan, waste of human resources caused by a mode of manually cleaning dust is avoided, the problem of the working process of the induced draft fan is also avoided, the instantaneously increased vibration signal is isolated through the capacitor C1, bearing vibration caused by the fact that a worker carelessly touches the induced draft fan is avoided, judgment of a signal output by the control output circuit to the signal detection circuit is influenced, and the accuracy of an alarm signal transmitted to a monitoring center by a network is improved.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
A network-based induced draft fan fault detection circuit is applied to blades and bearings of an induced draft fan, the fault detection circuit comprises a signal detection circuit and a control output circuit, the signal detection circuit detects dust concentration signals on the blades of the induced draft fan by using a dust sensor U1, vibration signals generated when the bearings of the induced draft fan vibrate are detected by using a vibration sensor U2, the dust concentration signals are firstly subjected to second-order low-pass filtering through a resistor R1, a resistor R3, a capacitor C2 and a capacitor C4 to convert PWM (pulse-width modulation) signals output by a dust concentration sensor U1 into analog signals, the dust concentration signals are transmitted to an operational amplifier U1B, then the dust concentration signals are output to a voltage stabilizing tube D2, when the amplitude of the dust concentration signals can conduct the voltage stabilizing tube D2 after time delay is carried out through the resistor R13 and the capacitor C6, the situation that dust is accumulated to a certain degree is shown, and the vibration condition of the bearings of the induced draft fan, the voltage regulator tube D2 transmits the dust concentration signal to the control output circuit, and at the same time, the vibration sensor U2 detects the vibration of the bearing of the induced draft fan, the bearing of the induced draft fan is vibrated when working, the capacitor C1 isolates the vibration signal which is instantaneously increased, the vibration of the bearing caused by the careless touch of the induced draft fan by the working personnel is avoided, the judgment of the signal output by the signal detection circuit by the post-stage circuit is influenced, the capacitor C3 and the inductor L1 resonate the vibration signal, the triode Q1 is used for amplifying the resonated vibration signal and outputting the vibration signal to the control output circuit, the OR gate in the control output circuit receives the vibration signal by the diode D1, the diode D3 receives the dust concentration signal, the dust concentration signal and the vibration signal conduct the OR gate to obtain the alarm signal, or the alarm signal is transmitted to the monitoring center by the network, the monitoring center is reminded of increasing the vibration of a bearing of the induced draft fan, the state of the induced draft fan and the bearing of the induced draft fan needs to be noticed, the other path conducts a dust removal control circuit, a delay circuit formed by a resistor R12 and a capacitor C5 delays an alarm signal, the time for the alarm signal to exist is prolonged, the alarm signal is transmitted to a triode Q2 through a voltage regulator tube D5, a dust remover is conducted through a diode D4 after the triode Q2 is conducted, the dust remover is used for beginning to remove dust accumulated on a blade of the induced draft fan, and the problems that the waste of manpower resources is caused by manual dust cleaning and the working process of the induced draft fan is also influenced are solved;
the signal detection circuit comprises a dust concentration sensor U1, a vibration sensor U2, a filter follower and an amplification tuner, wherein the dust concentration sensor U1 and the vibration sensor U2 are used for detecting dust concentration signals on a blade of an induced draft fan and vibration signals when a bearing of the induced draft fan vibrates respectively, the signal detection circuit adopts an infrared dust concentration sensor with the model of SM-PWM-01C as the dust concentration sensor U1, the filter follower comprises a resistor R1, a resistor R3, a capacitor C2, a capacitor C4, an operational amplifier U1B and a resistor R6, the dust concentration signals detected by the dust concentration sensor U1 are subjected to second-order low-pass filtering through the resistor R1, the resistor R3, the capacitor C2 and the capacitor C4, high-frequency noise is filtered, the influence on the dust concentration signals is avoided, and PWM signals output by the dust concentration sensor U1 are converted into analog signals, then transmitting the dust concentration signal to an operational amplifier U1B, enabling the operational amplifier U1B and a resistor R6 to serve as a follower at the moment, improving the capability of the dust concentration signal for driving a post-stage circuit, outputting the dust concentration signal to a voltage stabilizing tube D2, when the amplitude of the dust concentration signal can conduct the voltage stabilizing tube D2 after the time delay is carried out by the resistor R13 and a capacitor C6, indicating that the dust is accumulated to a certain degree, and affecting the vibration condition of a bearing of the induced draft fan, transmitting the dust concentration signal to a control output circuit by the voltage stabilizing tube D2, meanwhile, detecting the vibration of the bearing of the induced draft fan by adopting a vibration speed sensor MLV-8 as the vibration sensor U2, wherein the bearing of the induced draft fan is generated by vibration during working, isolating the vibration signal which is instantly increased by using a capacitor C1, avoiding the vibration of the bearing caused by carelessly touching the induced draft fan by a worker, resonating the vibration signal by the capacitor C3 and the inductor L1, the resonant vibration signal is amplified by using a triode Q1, the vibration signal is output to a control output circuit, a resistor R4 and a resistor R5 are voltage division circuits and provide proper base bias voltage for the triode Q1, wherein the amplifying tuner comprises a resistor R4, a resistor R5, a capacitor C3, an inductor L1 and a triode Q1;
the device comprises a resistor R1 and an operational amplifier U1B, wherein one end of a resistor R1 is connected with an out pin of a dust concentration sensor U1, the other end of the resistor R1 is respectively connected with one end of a resistor R3 and one end of a capacitor C2, the other end of the resistor R3 is respectively connected with one end of a capacitor C4 and the same-phase end of an operational amplifier U1B, the inverting end of the operational amplifier U1B is respectively connected with one end of a resistor R6 and one end of a resistor R9, the other end of the resistor R9 is respectively connected with one end of a capacitor C6, the other end of a capacitor C4, the other end of a capacitor C2 and a gnd pin of the dust concentration sensor U1 and is grounded, a VCC pin of a positive-polarity power supply VCC is connected with a VCC pin of the dust concentration sensor U1, the output end of the operational amplifier U1B is respectively connected with the other end of a resistor R6 and one end of a resistor R13, and the other end of the resistor R13 is respectively connected with the negative electrode of a stabilivolt tube D2 and the other end of a capacitor C6;
the vibration sensor comprises a capacitor C1 and a triode Q1, wherein one end of a capacitor C1 is connected with an out pin of a vibration sensor U2, the other end of the capacitor C1 is respectively connected with one end of a resistor R4, one end of a resistor R5 and a base of a triode Q1, a collector of the triode Q1 is respectively connected with one end of a capacitor C3 and one end of an inductor L1, an emitter of the triode Q1 is connected with one end of the resistor R7, the other end of the resistor R7 is respectively connected with the other end of the resistor R5 and a gnd pin of the vibration sensor U2 and is connected with the ground in parallel, the other end of the capacitor C3 is respectively connected with the other end of the inductor L1 and the other end of the resistor R4, and a VCC pin of a vibration sensor U2 is connected with a positive polarity power supply VCC;
the control output circuit comprises an AND gate and a dust removal control circuit, the OR gate comprises a diode D1, a diode D3 and a resistor R10, the dust removal control circuit comprises a resistor R12, a capacitor C5, a diode D5, a triode Q2, a diode D4 and a dust remover, the OR gate receives a vibration signal by using a diode D1, receives a dust concentration signal by using a diode D3, and conducts the OR gate with the vibration signal to obtain an alarm signal, or one path of the OR gate transmits the alarm signal to a monitoring center through a network to remind the monitoring center that the vibration of a bearing of the induced draft fan is increased and the state of the induced draft fan and the bearing of the induced draft fan needs to be noticed, the other path conducts the dust removal control circuit, delays the alarm signal by using a time delay circuit formed by a resistor R12 and a capacitor C5 to prolong the existence time of the alarm signal, and transmits the alarm signal to the triode Q2 through a voltage stabilizing tube D5, at the time, the stabilizing tube D5 is responsible for improving the conduction voltage of the triode Q2, after the triode Q2 is conducted, the dust remover is conducted through the diode D4, dust accumulated on the blade of the induced draft fan is removed by using the dust remover, the time spent by automatic cleaning is shorter than that of manual cleaning, and the problems that waste of human resources is caused by manual cleaning of dust and the working process of the induced draft fan is influenced are solved;
the filter follower comprises a diode D1 and a diode D3, wherein the anode of the diode D1 is respectively connected with one end of an inductor L1 of the amplification follower, one end of a capacitor C3 and the collector of a triode Q3, the cathode of a diode D1 is respectively connected with the cathode of a diode D3, one end of a resistor R10 and a network, and the other end of a resistor R10 is respectively connected with the other end of a resistor R9 in the filter follower and the other end of a resistor R7 of the amplification tuner and connected with the ground in parallel;
the negative-polarity-type electrostatic precipitator comprises a triode Q2 and a precipitator, wherein the base electrode of a triode Q2 is connected with the positive electrode of a voltage regulator tube D5, the negative electrode of the voltage regulator tube D5 is respectively connected with one end of a resistor R12 and one end of a capacitor C5, the other end of a resistor R12 is connected with the negative electrode of a diode D1 in an OR gate, the negative electrode of a diode D3, one end of a resistor R10 and a network, the collector electrode of the triode Q2 is respectively connected with the positive electrode of a diode D4 and one end of the resistor R8, the negative electrode of a diode D4 is connected with the precipitator, the other end of the resistor R8 is connected with a positive-polarity power supply VCC, the emitter electrode of the triode Q2 is connected with one end of a resistor R2, and the other end of the resistor R2 is respectively connected with the other end of a capacitor C5 or the other end of a resistor R10 in the gate and grounded.
When the utility model is used, the signal detection circuit utilizes the dust sensor U1 to detect the dust concentration signal on the blade of the draught fan, the vibration sensor U2 is utilized to detect the vibration signal when the bearing of the draught fan vibrates, the dust concentration signal firstly passes through the resistor R1, the resistor R3, the capacitor C2 and the capacitor C4 to carry out second-order low-pass filtering to convert the PWM signal output by the dust concentration sensor U1 into an analog signal, and transmits the dust concentration signal to the conveying and placing device U1B, and then outputs the dust concentration signal to the voltage stabilizing tube D2, when the amplitude of the dust concentration signal can switch on the voltage stabilizing tube D2 after the time delay is carried out by the resistor R13 and the capacitor C6, the certain degree that the dust is accumulated is shown, the vibration condition of the bearing of the draught fan is influenced, the voltage stabilizing tube D2 transmits the dust concentration signal to the control output circuit, and simultaneously, the vibration sensor U2 is used to detect the vibration of the bearing of the draught fan, the induced draft fan bearing is vibrated to generate vibration when working, a capacitor C1 is used for isolating a vibration signal which is instantaneously increased, the vibration of the bearing caused by that a worker carelessly touches the induced draft fan is avoided, a capacitor C3 and an inductor L1 resonate the vibration signal, the resonated vibration signal is amplified by using a triode Q1, the vibration signal is output to a control output circuit, an OR gate in the control output circuit receives the vibration signal by using a diode D1, receives a dust concentration signal by using a diode D3, obtains an alarm signal after the OR gate is conducted by the dust concentration signal and the vibration signal, transmits the alarm signal to a monitoring center by one path of the OR gate through a network to remind the monitoring center that the vibration of the induced draft fan bearing is increased and the state of the induced draft fan and the induced draft fan bearing needs to be noticed, conducts a dust removal control circuit by the other path, and delays the alarm signal by a time delay circuit formed by a resistor R12 and the capacitor C5, the time for existence of the alarm signal is prolonged, the alarm signal is transmitted to the triode Q2 through the voltage stabilizing tube D5, the dust remover is conducted through the diode D4 after the triode Q2 is conducted, dust accumulated on the blade of the induced draft fan is removed by the dust remover, and the problems that manpower resources are wasted and the working process of the induced draft fan is influenced due to the mode of manually cleaning the dust are solved;
the dust removal control circuit composed of the resistor R12, the capacitor C5, the diode D5, the triode Q2, the diode D4 and the dust removal control circuit composed of the dust remover, the diode D1, the diode D3 and the OR gate composed of the resistor R10 are used for automatically cleaning dust of the induced draft fan, waste of human resources caused by a mode of manually cleaning dust is avoided, the problem of the working process of the induced draft fan is also avoided, the instantaneously increased vibration signal is isolated through the capacitor C1, bearing vibration caused by the fact that a worker carelessly touches the induced draft fan is avoided, judgment of a signal output by the control output circuit to the signal detection circuit is influenced, and the accuracy of an alarm signal transmitted to a monitoring center by a network is improved.
Claims (7)
1. The utility model provides an draught fan fault detection circuit based on network, a serial communication port, fault detection circuit includes signal detection circuit and control output circuit, signal detection circuit utilizes dust sensor U1 to detect the dust concentration signal on the draught fan blade, and the vibration signal when utilizing vibration sensor U2 to detect draught fan bearing vibration to make the dust concentration signal export respectively to control output circuit after filter follower, vibration signal enlarge the tuner, and control output circuit obtains alarm signal through OR gate, and alarm signal triggers dust removal control circuit.
2. The induced draft fan fault detection circuit based on the network as claimed in claim 1, wherein the signal detection circuit comprises a dust concentration sensor U1, a vibration sensor U2, a filter follower and an amplification tuner, the dust concentration sensor U1 is connected with one end of the filter follower, the vibration sensor U2 is connected with one end of the amplification tuner, a dust concentration signal on the induced draft fan blade detected by the dust concentration sensor U1 is filtered and followed by the filter follower circuit, and the vibration sensor U2 resonates and amplifies a detected vibration signal when the induced draft fan bearing vibrates.
3. The induced draft fan fault detection circuit based on the network as claimed in claim 2, wherein the filter follower comprises a resistor R1 and an operational amplifier U1B, one end of the resistor R1 is connected to an out pin of a dust concentration sensor U1, the other end of the resistor R1 is connected to one end of a resistor R3 and one end of a capacitor C2, the other end of the resistor R3 is connected to one end of a capacitor C4 and the same-phase end of an operational amplifier U1B, the inverting end of the operational amplifier U1B is connected to one end of a resistor R6 and one end of a resistor R9, the other end of the resistor R9 is connected to one end of a capacitor C6, the other end of a capacitor C4, the other end of a capacitor C2 and a gnd pin of a dust concentration sensor U1 and is grounded, the VCC pin of the dust concentration sensor U1 is connected to a positive-polarity power supply VCC, the output end of the operational amplifier U1B is connected to the other end of a resistor R6 and one end of a resistor R828456, and the negative electrode of the voltage regulator tube 2 are connected to the negative electrode of a voltage regulator tube 2 The other end of the capacitor C6.
4. The induced draft fan fault detection circuit based on the network as claimed in claim 2, wherein the amplifying tuner comprises a capacitor C1 and a transistor Q1, one end of the capacitor C1 is connected to the out pin of the vibration sensor U2, the other end of the capacitor C1 is connected to one end of a resistor R4, one end of a resistor R5 and the base of the transistor Q1, the collector of the transistor Q1 is connected to one end of a capacitor C3 and one end of an inductor L1, the emitter of the transistor Q1 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to the other end of the resistor R5 and the gnd pin of the vibration sensor U2 and connected to ground, the other end of the capacitor C3 is connected to the other end of the inductor L1 and the other end of the resistor R4, and the VCC pin of the vibration sensor U2 is connected to a positive polarity power source VCC.
5. The induced draft fan fault detection circuit based on the network as claimed in claim 1, wherein the control output circuit comprises an or gate and a dust removal control circuit, the or gate is respectively connected with the other end of the filter follower and the other end of the amplification tuner, the other end of the or gate is connected with the dust removal control circuit, or the gate is connected with a dust concentration signal and a vibration signal respectively output by the filter follower and the amplification tuner to obtain an alarm signal, and the alarm signal controls the conduction of the dust removal control circuit.
6. The induced draft fan fault detection circuit based on the network as claimed in claim 5, wherein the or gate comprises a diode D1 and a diode D3, the anode of the diode D1 is connected to one end of an inductor L1 of the amplification follower, one end of a capacitor C3 and the collector of a triode Q3 respectively, the cathode of a diode D1 is connected to the cathode of the diode D3, one end of a resistor R10 and the network respectively, and the other end of the resistor R10 is connected to the other end of a resistor R9 in the filter follower and the other end of a resistor R7 of the amplification tuner respectively and connected to the ground in parallel.
7. The induced draft fan fault detection circuit based on the network as claimed in claim 5, wherein the dust removal control circuit comprises a triode Q2 and a dust remover, the base of the triode Q2 is connected with the anode of a voltage regulator tube D5, the cathode of the voltage regulator tube D5 is respectively connected with one end of a resistor R12 and one end of a capacitor C5, the other end of the resistor R12 is connected with the cathode of a diode D1 in an OR gate, the cathode of the diode D3, one end of a resistor R10 and the network, the collector of the triode Q2 is respectively connected with the anode of a diode D4 and one end of a resistor R8, the cathode of a diode D4 is connected with the dust remover, the other end of the resistor R8 is connected with a positive polarity power supply VCC, the emitter of the triode Q2 is connected with one end of a resistor R2, and the other end of the resistor R2 is respectively connected with the other end of a capacitor C5 or the other end of a resistor R10 in the gate and grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120153665.1U CN214067330U (en) | 2021-01-20 | 2021-01-20 | Draught fan fault detection circuit based on network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120153665.1U CN214067330U (en) | 2021-01-20 | 2021-01-20 | Draught fan fault detection circuit based on network |
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| CN214067330U true CN214067330U (en) | 2021-08-27 |
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| CN202120153665.1U Active CN214067330U (en) | 2021-01-20 | 2021-01-20 | Draught fan fault detection circuit based on network |
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