CN216309089U - Boiler hot water pipeline flow detection system - Google Patents
Boiler hot water pipeline flow detection system Download PDFInfo
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- CN216309089U CN216309089U CN202121754055.3U CN202121754055U CN216309089U CN 216309089 U CN216309089 U CN 216309089U CN 202121754055 U CN202121754055 U CN 202121754055U CN 216309089 U CN216309089 U CN 216309089U
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Abstract
The utility model discloses a boiler hot water pipeline flow detection system, which comprises a flow sensor and an electric control valve which are arranged on a hot water pipeline, wherein detection signals of the flow sensor are sequentially processed by a filtering noise reduction circuit, an amplifying stability adjusting circuit and a stability converting circuit and then are sent into a controller, and the controller is used for controlling the opening of the electric control valve; according to the utility model, the filtering noise reduction circuit, the amplification stability adjusting circuit and the stability converting circuit are arranged to adjust the detection signal of the flow sensor, so that the fluctuation caused by the imbalance of the detection signal due to external interference is well avoided, the precision and the stability of the detection signal are greatly improved, the error of hot water flow detection is effectively avoided, and the effective application of production energy management is ensured.
Description
Technical Field
The utility model relates to the technical field of flow monitoring equipment, in particular to a boiler hot water pipeline flow detection system.
Background
The direct relation between the flow measurement of the boiler hot water pipeline and the production benefits of enterprises is an important means for scientifically managing energy and improving economic benefits. At present, the flow measurement principle of a boiler hot water pipeline is based on a Faraday electromagnetic induction law, and after output signals of an electromagnetic flowmeter are amplified, the pipeline flow is calculated by using a controller and is used for adjusting and controlling the flow. In the actual use process, the temperature detection signal is out of order due to the temperature influence of the hot water pipeline and interference factors such as fluid fluctuation, so that the flow detection is deviated, and errors are caused to the production energy management.
The present invention provides a new solution to this problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, the present invention is directed to a system for detecting the flow rate of a hot water pipe of a boiler.
The technical scheme for solving the problem is as follows: a flow detection system of a boiler hot water pipeline comprises a flow sensor and an electric control valve which are arranged on the hot water pipeline, wherein detection signals of the flow sensor are sent into a controller after being processed by a filtering noise reduction circuit, an amplifying stabilizing and adjusting circuit and a stabilizing and converting circuit in sequence, and the controller is used for controlling the opening degree of the electric control valve.
Furthermore, the filtering and noise reducing circuit comprises an inductor L1, one end of the inductor L1 is connected with the signal output end of the flow sensor, and the other end of the inductor L1 is connected with the input end of the amplification and stabilization regulating circuit and is grounded through a capacitor C1.
Further, the amplification stabilization adjusting circuit comprises an operational amplifier AR1 and a MOS transistor Q1, a non-inverting input terminal of the operational amplifier AR1 is connected to one end of a capacitor C1 through a resistor R1 and is grounded through a capacitor C2, a drain of the MOS transistor Q1 is connected to one end of the capacitor C1 through a resistor R2, an inverting input terminal of the operational amplifier AR1 is connected to an output terminal of the operational amplifier AR1 through a resistor R3 and a capacitor C3 which are connected in parallel, an output terminal of the operational amplifier AR1 is connected to a gate of the MOS transistor Q1 and one end of the resistor R5 through a voltage stabilizer, and the other end of the resistor R5 is grounded.
Further, the voltage stabilizer comprises a triode VT1, a resistor R4 and a voltage stabilizing diode DZ1, wherein an emitter of the triode VT1 and one end of the resistor R4 are connected with the output end of the operational amplifier AR1, a base of the triode VT1 and the other end of the resistor R4 are connected with a cathode of the voltage stabilizing diode DZ1, an anode of the voltage stabilizing diode DZ1 is grounded, and a collector of the triode VT1 is connected with a grid electrode of the MOS transistor Q1.
Further, the stable conversion circuit comprises an A/D converter, the input end of the A/D converter is connected with the grid electrode of the MOS tube Q1 through a resistor R6 and is grounded through a capacitor C4 and a resistor R7 which are connected in parallel, and the output end of the A/D converter is connected with the controller.
Through the technical scheme, the utility model has the beneficial effects that: according to the utility model, the filtering noise reduction circuit, the amplification stability adjusting circuit and the stability converting circuit are arranged to adjust the detection signal of the flow sensor, so that the fluctuation caused by the imbalance of the detection signal due to external interference is well avoided, the precision and the stability of the detection signal are greatly improved, the error of hot water flow detection is effectively avoided, and the effective application of production energy management is ensured.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and utilities 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 drawings of 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 boiler hot water pipeline flow detection system comprises a flow sensor and an electric control valve which are arranged on a hot water pipeline, wherein detection signals of the flow sensor are sent into a controller after being processed by a filtering noise reduction circuit, an amplifying stabilizing and adjusting circuit and a stabilizing and converting circuit in sequence, and the controller is used for controlling the opening of the electric control valve.
As shown in FIG. 1, the filtering and noise reducing circuit includes an inductor L1, one end of the inductor L1 is connected to the signal output terminal of the flow sensor, and the other end of the inductor L1 is connected to the input terminal of the amplification and stabilization adjusting circuit and is grounded through a capacitor C1.
The amplifying and stabilizing adjusting circuit comprises an operational amplifier AR1 and a MOS transistor Q1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a capacitor C1 through a resistor R1 and is grounded through a capacitor C2, the drain electrode of the MOS transistor Q1 is connected with one end of the capacitor C1 through a resistor R2, the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R3 and a capacitor C3 which are connected in parallel, the output end of the operational amplifier AR1 is connected with the gate of the MOS transistor Q1 and one end of a resistor R5 through a voltage stabilizer, and the other end of the resistor R5 is grounded. The voltage stabilizer comprises a triode VT1, a resistor R4 and a voltage stabilizing diode DZ1, wherein an emitter of the triode VT1 is connected with one end of the resistor R4 to be connected with the output end of the operational amplifier AR1, a base of the triode VT1 and the other end of the resistor R4 are connected with a cathode of the voltage stabilizing diode DZ1, an anode of the voltage stabilizing diode DZ1 is grounded, and a collector of the triode VT1 is connected with a grid electrode of the MOS transistor Q1.
The stabilizing conversion circuit comprises an A/D converter, the input end of the A/D converter is connected with the grid electrode of a MOS tube Q1 through a resistor R6 and is grounded through a capacitor C4 and a resistor R7 which are connected in parallel, and the output end of the A/D converter is connected with a controller.
When the water heater is used specifically, the flow sensor detects the water flow in the hot water pipeline and converts the water flow into an analog electric signal to be output. The filtering and noise reducing circuit adopts an LC filtering principle to firstly reduce noise of a flow detection signal, eliminate mechanical noise caused by water flow impact and then send the mechanical noise into the amplifying and stabilizing adjusting circuit for further processing.
The amplification stability adjusting circuit adopts an operational amplifier AR1 as a main amplifier to amplify the signal after LC filtering, and meanwhile, a MOS tube Q1 carries out shunt amplification on the flow detection signal. In the processing process of the operational amplifier AR1, the resistor R3 and the capacitor C3 form a resistor-capacitor feedback element to perform phase adjustment on the output signal of the operational amplifier AR1, so that the signal output waveform is improved well, and the signal is prevented from being out of order. Then, a voltage stabilizer is arranged at the output end of the operational amplifier AR1 to perform stable adjustment on the operational amplifier output signal, a stable driving signal voltage is formed at the gate of the MOS tube Q1 by utilizing the principle of a triode voltage stabilizer, and the MOS tube Q1 is ensured to be well stable during shunt amplification output, so that the stability of the flow detection signal amplification output is ensured.
And finally, the stable conversion circuit performs low-pass noise reduction on the output signal of the MOS tube Q1 by adopting RC filtering to further eliminate power supply noise, and then converts the analog flow detection signal into digital quantity through the A/D converter and sends the digital quantity into the controller. After the controller utilizes ripe data processing technique to calculate the real-time flow in the hot-water line, through setting for the range value with the system and contrast, when the flow detection value surpassed the system and set for the range, the flow in the hot-water line was in time adjusted through the aperture of control automatically controlled valve to the controller to guarantee that hot-water flow is in setting for the within range all the time, guarantee the effective utilization of the energy.
In summary, the utility model adjusts the detection signal of the flow sensor by arranging the filtering noise reduction circuit, the amplifying stabilization adjusting circuit and the stabilization converting circuit, thereby well avoiding the fluctuation caused by the maladjustment of the detection signal due to external interference, greatly improving the precision and the stability of the detection signal, effectively avoiding the occurrence of errors in the hot water flow detection, and ensuring the effective application of the production energy management.
While the utility model has been described in further detail with reference to specific embodiments thereof, it is not intended that the utility model be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (5)
1. The utility model provides a boiler hot water pipeline flow detection system, includes flow sensor and the electric control valve of setting on hot water pipeline, its characterized in that: and detection signals of the flow sensor are processed by the filtering noise reduction circuit, the amplifying stability adjusting circuit and the stability switching circuit in sequence and then are sent into the controller, and the controller is used for controlling the opening of the electric control valve.
2. The boiler hot water pipe flow rate detection system according to claim 1, wherein: the filtering and noise reducing circuit comprises an inductor L1, one end of an inductor L1 is connected with the signal output end of the flow sensor, and the other end of an inductor L1 is connected with the input end of the amplification and stabilization regulating circuit and is grounded through a capacitor C1.
3. The boiler hot water pipe flow rate detection system according to claim 2, wherein: the amplifying and stabilizing adjusting circuit comprises an operational amplifier AR1 and a MOS transistor Q1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a capacitor C1 through a resistor R1 and is grounded through a capacitor C2, the drain electrode of the MOS transistor Q1 is connected with one end of the capacitor C1 through a resistor R2, the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R3 and a capacitor C3 which are connected in parallel, the output end of the operational amplifier AR1 is connected with the gate of the MOS transistor Q1 and one end of the resistor R5 through a voltage stabilizer, and the other end of the resistor R5 is grounded.
4. The boiler hot water pipe flow rate detection system according to claim 3, wherein: the voltage stabilizer comprises a triode VT1, a resistor R4 and a voltage stabilizing diode DZ1, wherein an emitter of the triode VT1 is connected with one end of the resistor R4 to be connected with the output end of the operational amplifier AR1, a base of the triode VT1 and the other end of the resistor R4 are connected with a cathode of the voltage stabilizing diode DZ1, an anode of the voltage stabilizing diode DZ1 is grounded, and a collector of the triode VT1 is connected with a grid electrode of the MOS tube Q1.
5. The boiler hot water pipe flow rate detection system according to claim 3, wherein: the stable conversion circuit comprises an A/D converter, the input end of the A/D converter is connected with the grid electrode of a MOS tube Q1 through a resistor R6 and is grounded through a capacitor C4 and a resistor R7 which are connected in parallel, and the output end of the A/D converter is connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121754055.3U CN216309089U (en) | 2021-07-30 | 2021-07-30 | Boiler hot water pipeline flow detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121754055.3U CN216309089U (en) | 2021-07-30 | 2021-07-30 | Boiler hot water pipeline flow detection system |
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| Publication Number | Publication Date |
|---|---|
| CN216309089U true CN216309089U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121754055.3U Active CN216309089U (en) | 2021-07-30 | 2021-07-30 | Boiler hot water pipeline flow detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216309089U (en) |
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2021
- 2021-07-30 CN CN202121754055.3U patent/CN216309089U/en active Active
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