CN212903783U - Hydraulic electric control valve tightness detection device - Google Patents
Hydraulic electric control valve tightness detection device Download PDFInfo
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- CN212903783U CN212903783U CN202022061827.7U CN202022061827U CN212903783U CN 212903783 U CN212903783 U CN 212903783U CN 202022061827 U CN202022061827 U CN 202022061827U CN 212903783 U CN212903783 U CN 212903783U
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Abstract
The utility model discloses a hydraulic power electric control valve leakproofness detection device, including valve body and detecting element, detecting element includes pressure sensor P1 who sets up in the valve body, and pressure sensor P1's detected signal sends into fortune in proper order and puts feedback stabilization circuit and filtering conversion circuit and handle the back and send into the controller, and fortune is put feedback stabilization circuit and is utilized RC wave filter principle to carry out low pass filtering to pressure detection signal, reduces because of the high frequency noise interference that the disturbance of the interior air current of valve brought to utilize electric capacity feedback compensation to reduce the amplification error in fortune is put; the output signal of the operational amplifier AR1 is sent into the MOS tube Q1, and the detection signal processed by the MOS tube Q1 can effectively reduce the interference caused by the fluctuation of the external temperature; when the valve body leaks, the controller outputs a high-level signal to drive the warning circuit to work, so that a tester is reminded of the valve body leaking, and the detection result is visual and reliable.
Description
Technical Field
The utility model relates to a valve tightness detects technical field, especially relates to a hydraulic power electric control valve leakproofness detection device.
Background
The hydraulic electric control valve is one of the most common valves in daily life and is closely related to the life of people. The hydraulic valve is widely applied to various aspects such as building pipelines, industrial water supply, fire fighting facilities, heating ventilation air conditioners, irrigation systems and the like, and is generally used for reducing pressure, maintaining pressure, relieving pressure, adjusting flow, controlling water level, preventing water hammer in advance and the like. When the sealing performance of the hydraulic electric control valve is not perfect, the phenomena of water leakage and incomplete closing can occur in the using process, and the normal use of the hydraulic electric control valve is influenced, so that the sealing performance of the hydraulic electric control valve needs to be detected before the hydraulic electric control valve is used.
The existing tightness detection device is mainly characterized in that a pressure sensor is arranged in a valve body of a hydraulic electric control valve, then the interior of the valve body is pressurized after the valve body is adjusted to be in a closed state, and the change of the pressure of gas in a pressure measuring tube is observed through a display panel, so that whether the interior of the valve body leaks gas or not is judged. However, in the actual measurement process, the air pressure in the valve body fluctuates due to the fluctuation of the external temperature and the interference of noise waves, so that the detection signal value is unstable, and the accuracy of the detection result is affected.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device for detecting the sealing performance of a hydraulic electrically-controlled valve.
The technical scheme for solving the problem is as follows: the utility model provides a hydraulic power electric control valve leakproofness detection device, includes valve body and detecting element, detecting element is including setting up pressure sensor in the valve body, pressure sensor's detected signal sends into in proper order and handles the back and send into the controller in fortune feedback stabilizing circuit and the filter transfer circuit, works as when the valve body appears leaking, the controller exports high level signal drive warning circuit work.
Further, the operational amplifier feedback stabilizing circuit comprises an operational amplifier AR1, an inverting input terminal of the operational amplifier AR1 is connected with one end of a resistor R3 and one end of a capacitor C2, the other end of the resistor R3 is connected with a signal output terminal of the pressure sensor and one end of a resistor R1 and one end of a capacitor C1 through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, a non-inverting input terminal of the operational amplifier AR1 is grounded, an output terminal of the operational amplifier AR1 is connected with the other end of the capacitor C2, the power supply circuit is connected with the drain of a MOS transistor Q1 and one end of a resistor R5 through a resistor R4, the gate of the MOS transistor Q1 is connected with the other end of a resistor R5 and the cathode of a voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the source of the MOS transistor Q1 is connected with one ends of resistors R6 and R7, the other end of the resistor R6 is connected with the non-inverting input end of an operational amplifier AR2, the inverting input end and the output end of the operational amplifier AR2 are connected with the other end of a resistor R3, and the other end of the resistor R7 is connected with the input end.
Furthermore, the filtering conversion circuit comprises an inductor L1, a capacitor C3 and an A/D converter, one end of the inductor L1 is connected with the other end of the resistor R7, the other end of the inductor L1 is connected with the input end of the A/D converter and is grounded through the capacitor C3, and the output end of the A/D converter is connected with the pressure signal detection end of the controller.
Furthermore, the warning circuit comprises a triode T1, the base of the triode T1 is connected with the control output end of the controller and is grounded through a capacitor C4, the collector of the triode T1 is connected with a +5V power supply through a resistor R8, and the emitter of the triode T1 is grounded through a warning lamp LED1 and an alarm LS1 which are connected in parallel.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a pressure sensor P1 carries out real-time detection to the pressure in the valve body, and fortune is put feedback stabilization circuit and is utilized RC wave filter principle to carry out low pass filtering to the pressure detection signal, reduces the high frequency noise interference that brings because of the disturbance of the interior air current of valve to utilize electric capacity feedback compensation to reduce the amplification error in the fortune is put;
2. the output signal of the operational amplifier AR1 is sent into the MOS tube Q1, because the MOS tube has good temperature characteristic, the detection signal processed by the MOS tube Q1 can effectively reduce the interference caused by the fluctuation of the external temperature, and meanwhile, the voltage stabilizing diode DZ1 plays a reference role in the grid voltage of the MOS tube Q1, so the stability of the output signal of the MOS tube Q1 can be effectively improved;
3. the controller continuously monitors and analyzes the pressure detection value in a detection period, and when the fluctuation quantity of the pressure detection value exceeds a set value and the valve body is judged to be leaked, the controller outputs a high-level signal to drive the warning circuit to work and send out an audible and visual alarm signal to remind a tester of the valve body leakage, and the detection result is visual and reliable.
Drawings
Fig. 1 is the utility model discloses feedback stabilizing circuit and filter converting circuit schematic diagram are put to fortune.
Fig. 2 is a schematic diagram of the warning circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects 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 1 to 2. 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.
The utility model provides a hydraulic power electric control valve leakproofness detection device, includes valve body and detecting element, and detecting element is including setting up pressure sensor P1 in the valve body, and pressure sensor P1's detected signal sends into the controller after handling in operational amplifier feedback stabilizing circuit and the filter converting circuit in proper order, and when the valve body appeared leaking, the controller exported high level signal drive warning circuit work.
As shown in fig. 1, the operational amplifier feedback stabilizing circuit includes an operational amplifier AR1, an inverting input terminal of the operational amplifier AR1 is connected to one end of a resistor R3 and a capacitor C2, the other end of the resistor R3 is connected to a signal output terminal of a pressure sensor P1 and one end of a resistor R1 and one end of a capacitor C1 through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, a non-inverting input terminal of the operational amplifier AR1 is grounded, an output terminal of the operational amplifier AR1 is connected to the other end of a capacitor C2, the power supply circuit is connected with the drain of a MOS transistor Q1 and one end of a resistor R5 through a resistor R4, the gate of the MOS transistor Q1 is connected with the other end of a resistor R5 and the cathode of a voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the source of the MOS transistor Q1 is connected with one ends of resistors R6 and R7, the other end of the resistor R6 is connected with the non-inverting input end of an operational amplifier AR2, the inverting input end and the output end of the operational amplifier AR2 are connected with the other end of a resistor R3, and the other end of the resistor R7 is connected with the input.
The filter conversion circuit comprises an inductor L1, a capacitor C3 and an A/D converter, one end of the inductor L1 is connected with the other end of the resistor R7, the other end of the inductor L1 is connected with the input end of the A/D converter and is grounded through the capacitor C3, and the output end of the A/D converter is connected with the pressure signal detection end of the controller.
As shown in fig. 2, the warning circuit includes a transistor T1, a base of the transistor T1 is connected to the control output terminal of the controller and is grounded through a capacitor C4, a collector of the transistor T1 is connected to a +5V power supply through a resistor R8, and an emitter of the transistor T1 is grounded through a warning light LED1 and an alarm LS1 which are connected in parallel.
The utility model discloses a concrete theory of operation does: the pressure sensor P1 detects the pressure in the valve body in real time, and the resistor R1 and the capacitor C1 in the operational amplifier feedback stabilizing circuit form an RC filter to perform low-pass filtering on a pressure detection signal, so that high-frequency noise interference caused by air flow disturbance in the valve is reduced, and then the high-frequency noise interference is sent to the operational amplifier AR1 to be amplified. In the operational amplifier process, the capacitor C2 plays a role in signal compensation at the feedback end of the operational amplifier AR1, so that the amplification error is reduced. The output signal of the operational amplifier AR1 is sent to the MOS transistor Q1, and because the MOS transistor has good temperature characteristics, the detection signal processed by the MOS transistor Q1 can effectively reduce the interference caused by the fluctuation of the external temperature, and the zener diode DZ1 plays a reference role in the gate voltage of the MOS transistor Q1, so that the stability of the output signal of the MOS transistor Q1 can be effectively improved.
The output signal of the MOS transistor Q1 forms two paths of shunt through the resistors R6 and R7, wherein one path of shunt signal is sent into the operational amplifier AR2 for follow-up amplification, so that the operational amplifier process forms closed-loop feedback, and the processing efficiency and the detection precision of the signal are greatly improved. The other path of the split signal is sent to a filter conversion circuit for LC filtering, so that the interference of external noise is further reduced, and finally, the pressure detection signal is converted into digital quantity through an A/D converter and then sent to a controller.
The controller continuously monitors and analyzes the pressure detection value in a detection period, and when the fluctuation amount of the pressure detection value exceeds a set value, the valve body is judged to be leaked. At the moment, the control output end of the controller outputs a high level signal, the high level signal is stably sent to the base of the triode T1 through the capacitor C4 to be conducted, then the warning lamp LED1 and the alarm LS1 are powered on simultaneously to send out sound and light alarm signals, the valve body of a tester is reminded of leakage, and the detection result is visual and reliable.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides a hydraulic power electric control valve leakproofness detection device, includes valve body and detecting element, its characterized in that: the detection unit is in including setting up pressure sensor in the valve body, pressure sensor's detected signal sends into the controller after handling in fortune is put feedback stabilizing circuit and the filter converting circuit in proper order, works as when the valve body appears leaking, controller output high level signal drive warning circuit work.
2. The tightness detection device of a hydraulic electrically controlled valve according to claim 1, wherein: the operational amplifier feedback stabilizing circuit comprises an operational amplifier AR1, wherein the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R3 and one end of a capacitor C2, the other end of the resistor R3 is connected with the signal output end of the pressure sensor and one end of a resistor R1 and one end of a capacitor C1 through a resistor R2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, the non-inverting input end of the operational amplifier AR1 is grounded, the output end of the operational amplifier AR1 is connected with the other end of the capacitor C2, the power supply circuit is connected with the drain of a MOS transistor Q1 and one end of a resistor R5 through a resistor R4, the gate of the MOS transistor Q1 is connected with the other end of a resistor R5 and the cathode of a voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the source of the MOS transistor Q1 is connected with one ends of resistors R6 and R7, the other end of the resistor R6 is connected with the non-inverting input end of an operational amplifier AR2, the inverting input end and the output end of the operational amplifier AR2 are connected with the other end of a resistor R3, and the other end of the resistor R7 is connected with the input end.
3. The tightness detection device of a hydraulic electrically controlled valve according to claim 2, wherein: the filtering conversion circuit comprises an inductor L1, a capacitor C3 and an A/D converter, one end of the inductor L1 is connected with the other end of the resistor R7, the other end of the inductor L1 is connected with the input end of the A/D converter and is grounded through a capacitor C3, and the output end of the A/D converter is connected with the pressure signal detection end of the controller.
4. The tightness detection device of a hydraulic electrically controlled valve according to claim 3, wherein: the warning circuit comprises a triode T1, the base electrode of the triode T1 is connected with the control output end of the controller and is grounded through a capacitor C4, the collector electrode of the triode T1 is connected with a +5V power supply through a resistor R8, and the emitter electrode of the triode T1 is grounded through a warning lamp LED1 and an alarm LS1 which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022061827.7U CN212903783U (en) | 2020-09-19 | 2020-09-19 | Hydraulic electric control valve tightness detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022061827.7U CN212903783U (en) | 2020-09-19 | 2020-09-19 | Hydraulic electric control valve tightness detection device |
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| CN212903783U true CN212903783U (en) | 2021-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114518192A (en) * | 2022-02-25 | 2022-05-20 | 黄河水利职业技术学院 | Detection circuit for mobile base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114518192A (en) * | 2022-02-25 | 2022-05-20 | 黄河水利职业技术学院 | Detection circuit for mobile base station |
| CN114518192B (en) * | 2022-02-25 | 2023-06-02 | 黄河水利职业技术学院 | Detection circuit for mobile base station |
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