CN212779400U - High-voltage external insertion type electrode fault protection device - Google Patents
High-voltage external insertion type electrode fault protection device Download PDFInfo
- Publication number
- CN212779400U CN212779400U CN202021684614.3U CN202021684614U CN212779400U CN 212779400 U CN212779400 U CN 212779400U CN 202021684614 U CN202021684614 U CN 202021684614U CN 212779400 U CN212779400 U CN 212779400U
- Authority
- CN
- China
- Prior art keywords
- resistor
- electrode
- operational amplifier
- protection device
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a high-pressure external plug-in type electrode fault protection device, including surveying buret, survey buret lateral wall on the perpendicular to survey buret passageway and be provided with electrode insertion through-hole, be provided with temperature probe's signal output part connection signal amplifier circuit's input in the through-hole, signal amplifier circuit's output connection signal filtering conditioning circuit's input, filtering conditioning circuit's output connection director, the controller is used for the on-state of electrode, and reports to the police when the electrode is overheated, the utility model discloses a be provided with temperature probe in the through-hole and come real-time supervision high-pressure external plug-in type electrode operating temperature to when the temperature detection value surpasss the safety range, control electrode outage is reported to the police, in time reminds the staff to overhaul, has greatly promoted the safety in utilization.
Description
Technical Field
The utility model relates to a high-pressure external plug-in type electrode technical field especially relates to a high-pressure external plug-in type electrode fault protection device.
Background
At present, the installation mode of an electrode of an electromagnetic flowmeter mainly adopts an interpolation mode, namely the electrode is installed from inside to outside and is sealed with an insulating anticorrosive lining by the electrode. The high-voltage external-plug electrode is easy to form the condition of larger working pressure or higher medium temperature in the working process, and the head of the electrode is small in sealing, so that internal leakage is easy to cause, measurement faults of a flowmeter are caused, and fault protection needs to be carried out on the high-voltage external-plug electrode.
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 high-voltage external insertion type electrode fault protection device.
The technical scheme for solving the problem is as follows: the utility model provides a high-pressure extrapolation formula electrode fault protection device, is provided with electrode insertion through-hole including surveying buret, perpendicular to survey buret passageway on surveying buret lateral wall, be provided with temperature probe in the through-hole, temperature probe's signal output part connects signal amplification circuit's input, signal amplification circuit's output connects signal filtering conditioning circuit's input, filtering conditioning circuit's output connection director.
Preferably, the signal amplifying circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to the signal output terminal of the temperature measuring probe and is grounded through a resistor R1, an inverting input terminal of the operational amplifier AR1 is connected to one end of resistors R2 and R3, the other end of the resistor R3 is grounded, the other end of the resistor R2 is connected to the output terminal of the operational amplifier AR1, and an output terminal of the operational amplifier AR1 is grounded through a resistor R4 and a capacitor C1 which are connected in parallel and is connected to the input terminal of the filtering and conditioning circuit through a resistor R5.
Preferably, the filtering conditioning circuit includes an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the signal amplifying circuit, an inverting input terminal of the operational amplifier AR2 is grounded through a resistor R6, and is connected to one end of a resistor R10 and a source of a MOS transistor Q1 through a resistor R9 and a capacitor C3 which are connected in parallel, the other end of the resistor R10 is grounded, an output terminal of the operational amplifier AR2 is connected to one end of a capacitor C2 and a gate of the MOS transistor Q1 through a resistor R7, a source of the MOS transistor Q1 is connected to the other end of the capacitor C2 and is connected to a +5V power supply through a resistor R8, a source of the MOS transistor Q1 is connected to one end of the capacitor C4 and the controller through an inductor L1, and the.
Preferably, the temperature measuring probe is a PT100 temperature sensor.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a be provided with temperature probe in the through-hole and come real-time supervision high-pressure plug-in type electrode operating temperature to when the temperature detection value surpassed safe range, control electrode outage and report to the police, in time remind the staff to overhaul, greatly promoted the safety in utilization of high-pressure plug-in type electrode;
2. the filtering conditioning circuit adopts the operational amplifier AR2 to carry out secondary amplification on the RC-filtered signal, and simultaneously adopts the MOS tube Q1 to carry out follow-up amplification on the output signal of the operational amplifier AR2, so that the output waveform of the detection signal can be effectively improved by utilizing the good temperature characteristic of the MOS tube, the zero drift is effectively inhibited by utilizing negative feedback adjustment of the operational amplifier, and the temperature detection precision is improved.
Drawings
Fig. 1 is a schematic circuit diagram 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 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.
The utility model provides a high-pressure plug-in type electrode fault protection device, is provided with electrode insertion through-hole including surveying buret, perpendicular to survey buret passageway on surveying buret lateral wall, is provided with temperature probe in the through-hole, and temperature probe's signal output part connects signal amplification circuit's input, and signal amplification circuit's output is connected signal filtering conditioning circuit's input, and filtering conditioning circuit's output connection director, controller are used for the on-state of electrode to report to the police when the electrode is overheated.
The signal amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the temperature measuring probe and is grounded through a resistor R1, the inverting input end of the operational amplifier AR1 is connected with one end of resistors R2 and R3, the other end of a resistor R3 is grounded, the other end of a resistor R2 is connected with the output end of the operational amplifier AR1, and the output end of the operational amplifier AR1 is grounded through a resistor R4 and a capacitor C1 which are connected in parallel and is connected with the input end of the filtering conditioning circuit through a resistor R5.
The filter conditioning circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the output end of the signal amplifying circuit, the inverting input end of the operational amplifier AR2 is grounded through a resistor R6, the non-inverting input end of the operational amplifier AR2 is connected with one end of a resistor R10 and the source electrode of a MOS transistor Q1 through a resistor R9 and a capacitor C3 which are connected in parallel, the other end of the resistor R10 is grounded, the output end of the operational amplifier AR2 is connected with one end of a capacitor C2 and the grid electrode of the MOS transistor Q1 through a resistor R7, the source electrode of the MOS transistor Q1 is connected with the other end of a capacitor C2 and is connected with a +5V power supply through a resistor R8, the source electrode of the MOS transistor Q1 is connected.
The utility model discloses when specifically using, temperature probe chooses for use model PT100 temperature sensor J1 to carry out real-time supervision to high-pressure extrapolation formula electrode operating temperature, temperature sensor J1's detected signal carries out elementary amplification in sending into signal amplification circuit at first, fortune is put ware AR1 and is utilized cophase proportion to enlarge the principle and carry out the quick amplification to temperature detected signal, improve the signal amplification efficiency, then send into the RC filtering of being formed by resistance R4 and electric capacity C1 and carry out the low pass and fall and make an uproar, eliminate the high frequency interference that external power source brought to detecting.
The operational amplifier AR2 in the filtering and conditioning circuit performs secondary amplification on the RC-filtered signal, and meanwhile, the MOS tube Q1 is adopted to perform follow-up amplification on the output signal of the operational amplifier AR2, so that the output waveform of the detection signal can be effectively improved by utilizing the good temperature characteristic of the MOS tube. In order to avoid the phenomenon of signal amplification imbalance in the operational amplifier process, part of an output signal of the MOS transistor Q1 is filtered by an RC network formed by a resistor R9 and a capacitor C3 and then is sent to the inverting input end of the operational amplifier AR2, so that negative feedback regulation of the operational amplifier is formed, null shift is effectively inhibited, and the temperature detection precision is improved. And finally, the temperature detection value is compared with a system set safety value by the singlechip, when the temperature detection value exceeds a safety range, the singlechip controls the electrode to be powered off, and simultaneously controls the alarm device to work, so that a worker is reminded to overhaul in time, and the use safety of the high-voltage externally-inserted electrode is greatly improved.
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 high-pressure extrapolation formula electrode fault protection device, includes surveys buret, surveys buret lateral wall and goes up perpendicular to survey buret passageway and be provided with electrode insertion through-hole, its characterized in that: the temperature measuring device is characterized in that a temperature measuring probe is arranged in the through hole, the signal output end of the temperature measuring probe is connected with the input end of a signal amplifying circuit, the output end of the signal amplifying circuit is connected with the input end of a signal filtering conditioning circuit, and the output end of the filtering conditioning circuit is connected with a controller.
2. The high-voltage extrapolated electrode fault protection device of claim 1, wherein: the signal amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the temperature measuring probe and is grounded through a resistor R1, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R3 is grounded, the other end of the resistor R2 is connected with the output end of the operational amplifier AR1, and the output end of the operational amplifier AR1 is grounded through a resistor R4 and a capacitor C1 which are connected in parallel and is connected with the input end of the filtering conditioning circuit through a resistor R5.
3. The high-voltage extrapolated electrode fault protection device of claim 2, wherein: the filtering conditioning circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the output end of the signal amplifying circuit, the inverting input end of the operational amplifier AR2 is grounded through a resistor R6, and is connected with one end of a resistor R10 and the source electrode of a MOS tube Q1 through a resistor R9 and a capacitor C3 which are connected in parallel, the other end of the resistor R10 is grounded, the output end of the operational amplifier AR2 is connected with one end of a capacitor C2 and the grid electrode of the MOS tube Q1 through a resistor R7, the source electrode of the MOS tube Q1 is connected with the other end of a capacitor C2 and is connected with a +5V power supply through a resistor R8, the source electrode of the MOS tube Q1 is connected with one end of a capacitor C4 and the controller through an inductor.
4. The high-voltage external extrapolation electrode fault protection device according to claim 1 or 3, wherein: the temperature measuring probe is a PT100 temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021684614.3U CN212779400U (en) | 2020-08-13 | 2020-08-13 | High-voltage external insertion type electrode fault protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021684614.3U CN212779400U (en) | 2020-08-13 | 2020-08-13 | High-voltage external insertion type electrode fault protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212779400U true CN212779400U (en) | 2021-03-23 |
Family
ID=75053348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021684614.3U Active CN212779400U (en) | 2020-08-13 | 2020-08-13 | High-voltage external insertion type electrode fault protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212779400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114947804A (en) * | 2022-06-29 | 2022-08-30 | 芯海科技（深圳）股份有限公司 | Impedance measuring device and method and electronic equipment |
-
2020
- 2020-08-13 CN CN202021684614.3U patent/CN212779400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114947804A (en) * | 2022-06-29 | 2022-08-30 | 芯海科技（深圳）股份有限公司 | Impedance measuring device and method and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558507A (en) | Sensor for direct current fault line selection and alternating current interlarding line selection | |
| CN207586360U (en) | A kind of fault arc detection device | |
| CN212779400U (en) | High-voltage external insertion type electrode fault protection device | |
| CN203396920U (en) | Handheld alternating-current and direct-current circuit connection error monitoring and alarming device | |
| CN107765084B (en) | Universal voltage input power frequency signal frequency measurement system | |
| CN111238586B (en) | Electromagnetic flowmeter for measuring low conductivity and rate measuring method thereof | |
| CN111665385B (en) | Communication base station safety monitoring device | |
| CN210515623U (en) | Alarm device for VSD negative pressure drainage | |
| CN218995562U (en) | Partial discharge detection system of oil immersed transformer | |
| CN212903783U (en) | Hydraulic electric control valve tightness detection device | |
| CN203965527U (en) | A kind of electrostatic admeasuring apparatus | |
| CN216283814U (en) | Groundwater water level monitoring and early warning system | |
| CN210005594U (en) | digital high-resistance measuring device | |
| CN214743180U (en) | Crane fault monitoring and alarming system | |
| CN212903358U (en) | River flow meter | |
| CN210693542U (en) | Charging safety control device of photovoltaic charger | |
| CN210400489U (en) | Electromagnetic flowmeter fault detection device | |
| CN209541918U (en) | A kind of contactless temperature-measuring sensor | |
| CN203350322U (en) | Converter transformer bushing voltage divider with isolation and power amplification function | |
| CN107261331B (en) | Transcranial magnetic therapeutic apparatus with interference detection function and control method thereof | |
| CN205539339U (en) | Insulator detector | |
| CN205982159U (en) | Self -power's pipeline corrosion monitoring system based on FSM | |
| CN216668834U (en) | Electromagnetic flowmeter | |
| CN215005719U (en) | Vacuum tube online monitoring system of high-voltage switch cabinet | |
| CN219284586U (en) | Industrial gas leakage alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |