CN213633264U - Little water analyzer of oil - Google Patents
Little water analyzer of oil Download PDFInfo
- Publication number
- CN213633264U CN213633264U CN202022452235.8U CN202022452235U CN213633264U CN 213633264 U CN213633264 U CN 213633264U CN 202022452235 U CN202022452235 U CN 202022452235U CN 213633264 U CN213633264 U CN 213633264U
- Authority
- CN
- China
- Prior art keywords
- oil
- motor
- microcontroller
- resistor
- amplifier
- 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
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model relates to an oil micro-water analyzer, belonging to the technical field of oil micro-water analyzers; the technical problem to be solved is as follows: the improvement of the hardware structure of the oil micro-water analyzer is provided; the technical scheme for solving the technical problems is as follows: the device comprises a shell, and a microcontroller, a power supply module and a motor control module which are arranged in the shell, wherein a power supply end of the microcontroller is connected with the power supply module through a wire, and the microcontroller is also connected with the motor control module through a wire; a humidity sensor is also arranged on the side surface of the shell; the motor control module comprises a motor controller connected with the microcontroller through a lead, a circuit board of the motor control module comprises a motor main loop and a control loop, and the motor main loop realizes on-off control of the motor by arranging a contactor KM1 and the control loop; the utility model discloses be applied to moisture detection in the transformer insulating oil.
Description
Technical Field
The utility model relates to a little water analyzer of oil belongs to little water analyzer technical field of oil.
Background
The transformer insulating oil has the functions of insulation, corrosion resistance and heat dissipation in the operation of the transformer. Along with the long-term operation of the transformer, some moisture can be mixed into the insulating oil due to some objective or subjective factors, and the existence of the trace moisture can greatly reduce the insulating property of the insulating oil, accelerate the insulating aging, and also can cause the partial discharge breakdown and the bubble generation of the transformer, so that the normal service life of the transformer is seriously shortened, and even some accidents can be caused in serious cases, and huge property loss and personal injury are caused. Therefore, the transformer needs to be subjected to micro-water testing before being put into operation or after being operated for a certain time limit so as to prevent the micro-water from exceeding the standard.
The main method for measuring the micro water of the transformer insulating oil comprises the following steps: the distillation method, the Karl Fischer method, the gravimetric method and the dielectric constant method are widely used at present as the dielectric constant method in consideration of the test accuracy, rapidness, environmental protection and other factors. The basic principle of dielectric constant is: the dielectric constant of the transformer oil is determined by the difference of the dielectric constants of oil and water in the transformer oil and the water content in the oil, the sensors are capacitive temperature sensors and humidity sensors, the sensors are immersed in the oil, the capacitance changes due to the change of the dielectric constant, and the micro-water content is obtained by measuring the change of the capacitance and calculating. The control method of the existing oil micro-water analyzer during use is shown in fig. 1, and the following problems exist in daily use:
(1) the drying of the measuring chamber needs manual intervention, and the drying of the measuring chamber needs to be carried out by controlling a drying motor;
(2) the drying process is labor-consuming and inefficient, the drying motor of the measuring chamber is controlled by the inching switch, the oil chemical testing worker usually needs to continuously press the RESET key for twenty minutes to measure the trace water ppm of the chamber to reduce the trace water ppm to the required level, the efficiency is low, and the oil chemical testing worker is greatly tested on the patience and the physical strength;
(3) the inching switch has poor reliability, and in daily use, the inching switch used by the RESET key is often damaged due to different pressing forces of different testers, so that the replacement is relatively troublesome.
Therefore, it is required to provide an oil and micro water analyzer capable of realizing a one-key operation of the whole process of analyzing the transformer insulating oil and micro water.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: the improvement of the hardware structure of the oil micro-water analyzer is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: an oil micro-water analyzer is used for detecting moisture in transformer insulating oil and comprises a shell, and a microcontroller, a power module and a motor control module which are arranged in the shell, wherein a power supply end of the microcontroller is connected with the power module through a wire, and the microcontroller is also connected with the motor control module through a wire and used for controlling the rotating speed of a motor;
the front surface of the shell is provided with a touch screen for displaying the micro-water content in the transformer insulating oil, the side surface of the shell is provided with a guide pipe for collecting and placing an oil sample, the guide pipe is connected with an oil sample bottle opening through a pipeline, and the pipeline is provided with an oil well pump;
the side surface of the shell is also provided with a humidity sensor for acquiring micro-water data of the measuring chamber;
the control end of the oil well pump is connected with the microcontroller through a lead, and the touch screen and the humidity sensor are respectively connected with the microcontroller through leads;
the motor control module comprises a motor controller connected with the microcontroller through a wire, the circuit board of the motor control module comprises a motor main loop and a control loop, and the motor main loop realizes on-off control of the motor through setting the contactor KM1 and the control loop.
The front surface of the shell is also provided with a switch key and a measuring key, and the switch key and the measuring key are connected with the microcontroller through respective leads.
A fuse FU1 and a fuse FU2 for overcurrent protection are arranged at a power supply inlet end of the main loop of the motor, the fuse FU1 and the fuse FU2 are respectively connected with a normally open contact KM1.1 of a contactor KM1 through leads, and the normally open contact KM1.1 is connected with a power supply end of the motor after being connected with a thermal relay FR1 in series through leads;
a power supply end VCC of the control loop is connected in parallel with one end of an adjustable resistor R1, one end of a resistor R3, a power supply anode of an amplifier A1 and one end of a resistor R4 through a lead, the other end of the adjustable resistor R1 is connected in parallel with one end of a resistor R2 and a non-inverting input end of an amplifier A1 through a lead, the other end of the resistor R3 is connected in parallel with one end of a humidity sensitive resistor Rh1 and an inverting input end of an amplifier A1, and an output end of the amplifier A1 is connected in series with the other end of a resistor R4 and then connected in series with a fuse FU1 and a coil KM1.2 of;
the other end of the resistor R2, the other end of the humidity-sensitive resistor Rh1 and the power supply cathode of the amplifier A1 are grounded through leads.
The amplifier A1 specifically adopts a voltage comparison amplifier with the model LM339, and the adjustable resistor R1 is arranged at the non-inverting input end of the amplifier A1 and used for adjusting the non-inverting input end reference voltage of the amplifier A1.
The humidity sensitive resistor Rh1 is specifically a humidity sensitive resistor whose resistance value decreases as the humidity becomes larger.
The utility model discloses beneficial effect for prior art possesses does:
(1) whether the oil micro-water analysis measuring chamber needs to be dried or not does not need manual judgment and operation, micro-water data of the measuring chamber is collected by arranging a humidity sensor on an analyzer and is judged by a microcontroller, so that automatic control is realized;
(2) the inching mechanical switch for controlling the drying motor to start and stop is replaced by the electromagnetic relay, so that the reliability is higher, and the service life is longer;
(3) the drying of measuring chamber no longer needs artifical long-time pressing, has alleviateed the worker's of oil chemical examination work burden, has improved work efficiency.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a flow chart of a method for controlling oil and water in the prior art;
FIG. 2 is a schematic structural diagram of the oil micro-water analyzer of the present invention;
fig. 3 is a control circuit diagram of the main loop of the drying motor of the present invention;
fig. 4 is a circuit diagram of a control circuit of the contactor of the present invention;
fig. 5 is a schematic diagram of the circuit structure of the present invention;
fig. 6 is a flow chart of the control method of the oil micro water of the present invention.
In the figure: the device comprises a microcontroller 1, a power module 2, a motor control module 3, a touch screen 4, a conduit 5, a humidity sensor 6, a switch key 7, a measurement key 8 and a motor 9.
Detailed Description
As shown in fig. 1 to 6, the utility model relates to an oil trace water analyzer for moisture detection in transformer insulating oil, which comprises a housing, and a microcontroller 1, a power module 2 and a motor control module 3 which are arranged in the housing, wherein the power end of the microcontroller 1 is connected with the power module 2 through a wire, and the microcontroller 1 is also connected with the motor control module 3 through a wire for controlling the rotating speed of a motor 9;
the front surface of the shell is provided with a touch screen 4 for displaying the micro-water content in the transformer insulating oil, the side surface of the shell is provided with a guide pipe 5 for collecting and placing an oil sample, the guide pipe 5 is connected with an oil sample bottle opening through a pipeline, and the pipeline is provided with an oil well pump 10;
the side surface of the shell is also provided with a humidity sensor 6 for acquiring micro-water data of the measuring chamber;
the control end of the oil well pump 10 is connected with the microcontroller 1 through a lead, and the touch screen 4 and the humidity sensor 6 are respectively connected with the microcontroller 1 through leads;
the motor control module 3 comprises a motor controller connected with the microcontroller 1 through a lead, a circuit board of the motor control module 3 comprises a motor main loop and a control loop, and the motor main loop realizes on-off control of the motor 9 through setting the contactor KM1 and the control loop.
The front surface of the shell is also provided with a switch key 7 and a measuring key 8, and the switch key 7 and the measuring key 8 are connected with the microcontroller 1 through respective leads.
A fuse FU1 and a fuse FU2 for overcurrent protection are arranged at a power supply inlet end of the main loop of the motor, the fuse FU1 and the fuse FU2 are respectively connected with a normally open contact KM1.1 of a contactor KM1 through leads, and the normally open contact KM1.1 is connected with a power supply end of the motor 9 after being connected with a thermal relay FR1 in series through leads;
a power supply end VCC of the control loop is connected in parallel with one end of an adjustable resistor R1, one end of a resistor R3, a power supply anode of an amplifier A1 and one end of a resistor R4 through a lead, the other end of the adjustable resistor R1 is connected in parallel with one end of a resistor R2 and a non-inverting input end of an amplifier A1 through a lead, the other end of the resistor R3 is connected in parallel with one end of a humidity sensitive resistor Rh1 and an inverting input end of an amplifier A1, and an output end of the amplifier A1 is connected in series with the other end of a resistor R4 and then connected in series with a fuse FU1 and a coil KM1.2 of;
the other end of the resistor R2, the other end of the humidity-sensitive resistor Rh1 and the power supply cathode of the amplifier A1 are grounded through leads.
The amplifier A1 specifically adopts a voltage comparison amplifier with the model LM339, and the adjustable resistor R1 is arranged at the non-inverting input end of the amplifier A1 and used for adjusting the non-inverting input end reference voltage of the amplifier A1.
The humidity sensitive resistor Rh1 is specifically a humidity sensitive resistor whose resistance value decreases as the humidity becomes larger.
A control method of an oil micro-water analyzer comprises the following steps:
the method comprises the following steps: pressing a switch key 7 to start the oil and micro water analyzer, controlling a humidity sensor 6 by a microcontroller 1 to acquire micro water content in a measuring chamber and analyze and judge whether the micro water ppm value of the measuring chamber is in a set value, switching to a second step when the micro water ppm value of the measuring chamber exceeds the set value, and switching to a third step when the micro water ppm value of the measuring chamber is less than the set value;
step two: the motor control module 3 controls the circuit board to output high voltage, the control loop is electrified, the normally open contact KM1.1 is closed, and the motor 9 is started to dry the measuring chamber;
step three: the control loop is not powered on, the normally open contact KM1.1 is not closed, the motor 9 is not started, meanwhile, the microcontroller 1 controls the touch screen 4 to display and prompt the injection of an oil sample, the microcontroller 1 controls the oil pump 10 to inject the oil sample in an oil sample bottle into the guide pipe 5, the measurement key 8 is pressed to start the micro-water analysis of the oil sample, the measurement result is displayed on the touch screen 4 after the analysis is finished, and then the oil sample in the guide pipe 5 is discharged;
step four: after the oil sample is discharged, judging whether to perform next analysis according to the measurement result of the step three, and directly switching to the step after starting up in the step one when the next analysis is needed;
step five: and when the measurement is finished, a power-on/off key 7 is pressed to power off the oil and micro water analyzer.
The set value of the trace water ppm value of the measuring chamber in the first step is 5, and when the ppm value =5, the resistance in the control loop satisfies R1: r2= R3: rh1, the resistance of the adjustable resistor R1 is set according to the above formula.
The utility model provides a little water analyzer of oil abolishes the inching switch that original control drying motor opened and stops, and electromagnetic contactor, a fuse FU2, a thermal relay FR1 and a set of contactor normally open contact KM1.1 of strikeing into in the motor return circuit, as shown in fig. 3, fuse FU2 carries out overcurrent protection, and thermal relay FR1 carries out overload protection to the motor, and contactor KM1 is used for break-make drying motor. As shown in fig. 4, R1 is an adjustable resistor for adjusting 1/4 reference voltage of non-inverting input terminal of LM339, and Rh1 is a humidity sensitive resistor, and the resistance decreases as the humidity increases. The resistance value of the resistor R1 is adjusted so that when the measurement chamber ppm =5, the resistor satisfies the relationship R1: r2= R3: rh1, at which time the R1 resistance value that satisfies the condition is set. Therefore, when the micro water content ppm in the measuring chamber is less than 5, the humidity of the measuring chamber is low, the resistance value of the humidity sensitive resistor Rh1 is increased, the voltage of the non-inverting input end of the amplifier A1 is smaller than the voltage of the inverting input end, the output end of the amplifier A1 is zero, the contactor coil KM1.2 is not electrified, and the drying motor is not started; when the micro-water content ppm in the measuring chamber is greater than 5, the humidity of the measuring chamber is high, the resistance value of the humidity sensitive resistor Rh1 is reduced, the voltage of the non-inverting input end of the amplifier A1 is greater than that of the inverting input end, the amplifier A1 outputs high voltage under the action of the pull-up resistor R4, the high voltage is obtained through the fuse FU1 and the contactor KM1 coil KM1.2, and the drying motor 9 is started.
The control flow of the oil micro-water analyzer of the utility model is shown in figure 5. After the analyzer is started, firstly detecting the micro water content of the measuring chamber, acquiring humidity data of the measuring chamber through a humidity sensor 6, and analyzing and judging the micro water content of the measuring chamber by a microcontroller 1; when the micro water content ppm is greater than 5, the control circuit board outputs high voltage, the relay control loop is electrified, the normally open contact KM1.1 of the contactor is closed, and the drying motor 9 is started to dry the measuring chamber; when the micro water content ppm of the measuring chamber is less than 5, the contactor control loop is not powered on, the normally open contact KM1.1 is kept in an original state and is not closed, the drying motor 9 is not started at the moment, a prompt injection oil sample is displayed on the touch screen 4 of the analyzer, the microcontroller 1 controls the oil pump 10 to be started to inject the oil sample into the guide pipe 5, after the oil sample is injected, the micro water analysis of the oil sample is started according to the measurement 8, the analysis result is automatically displayed on the touch screen 4 after the analysis is finished, and then the oil sample is discharged to wait for the next analysis or shutdown.
About the utility model discloses what the concrete structure need explain, the utility model discloses a each part module connection relation each other is definite, realizable, except that the special explanation in the embodiment, its specific connection relation can bring corresponding technological effect to based on do not rely on under the prerequisite of corresponding software program execution, solve the utility model provides a technical problem, the utility model provides a model, the connection mode of parts, module, specific components and parts that appear all belong to the prior art such as the published patent that technical staff can acquire before the application day, published journal paper, or common general knowledge, need not to describe in detail for the technical scheme that the present case provided is clear, complete, realizable, and can be according to this technical means or obtain corresponding entity product.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. An oil micro-water analyzer is used for detecting moisture in transformer insulating oil and is characterized by comprising a shell, a microcontroller (1), a power module (2) and a motor control module (3), wherein the microcontroller (1), the power module (2) and the motor control module (3) are arranged in the shell, a power end of the microcontroller (1) is connected with the power module (2) through a wire, and the microcontroller (1) is also connected with the motor control module (3) through a wire and used for controlling the rotating speed of a motor (9);
the front surface of the shell is provided with a touch screen (4) for displaying the micro-water content in the transformer insulating oil, the side surface of the shell is provided with a guide pipe (5) for collecting and placing an oil sample, the guide pipe (5) is connected with an oil sample bottle opening through a pipeline, and the pipeline is provided with an oil well pump (10);
the side surface of the shell is also provided with a humidity sensor (6) for collecting micro-water data of the measuring chamber;
the control end of the oil well pump (10) is connected with the microcontroller (1) through a lead, and the touch screen (4) and the humidity sensor (6) are respectively connected with the microcontroller (1) through leads;
the motor control module (3) comprises a motor controller connected with the microcontroller (1) through a wire, the circuit board of the motor control module (3) comprises a motor main loop and a control loop, and the motor main loop realizes on-off control of the motor (9) through setting the contactor KM1 and the control loop.
2. The oil and micro water analyzer according to claim 1, wherein: the front surface of the shell is also provided with a switch key (7) and a measurement key (8), and the switch key (7) and the measurement key (8) are connected with the microcontroller (1) through respective leads.
3. The oil and micro water analyzer according to claim 2, wherein: a fuse FU1 and a fuse FU2 for overcurrent protection are arranged at a power supply inlet wire end of the main loop of the motor, the fuse FU1 and the fuse FU2 are respectively connected with a normally open contact KM1.1 of a contactor KM1 through leads, and the normally open contact KM1.1 is connected with a power supply end of the motor (9) after being connected with a thermal relay FR1 in series through leads;
a power supply end VCC of the control loop is connected in parallel with one end of an adjustable resistor R1, one end of a resistor R3, a power supply anode of an amplifier A1 and one end of a resistor R4 through a lead, the other end of the adjustable resistor R1 is connected in parallel with one end of a resistor R2 and a non-inverting input end of an amplifier A1 through a lead, the other end of the resistor R3 is connected in parallel with one end of a humidity sensitive resistor Rh1 and an inverting input end of an amplifier A1, and an output end of the amplifier A1 is connected in series with the other end of a resistor R4 and then connected in series with a fuse FU1 and a coil KM1.2 of;
the other end of the resistor R2, the other end of the humidity-sensitive resistor Rh1 and the power supply cathode of the amplifier A1 are grounded through leads.
4. The oil and micro water analyzer according to claim 3, wherein: the amplifier A1 specifically adopts a voltage comparison amplifier with the model LM339, and the adjustable resistor R1 is arranged at the non-inverting input end of the amplifier A1 and used for adjusting the non-inverting input end reference voltage of the amplifier A1.
5. The oil and micro water analyzer according to claim 4, wherein: the humidity sensitive resistor Rh1 is specifically a humidity sensitive resistor whose resistance value decreases as the humidity becomes larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022452235.8U CN213633264U (en) | 2020-10-29 | 2020-10-29 | Little water analyzer of oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022452235.8U CN213633264U (en) | 2020-10-29 | 2020-10-29 | Little water analyzer of oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213633264U true CN213633264U (en) | 2021-07-06 |
Family
ID=76626248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022452235.8U Active CN213633264U (en) | 2020-10-29 | 2020-10-29 | Little water analyzer of oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213633264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326742A (en) * | 2020-10-29 | 2021-02-05 | 国网山西省电力公司吕梁供电公司 | Oil micro-water analyzer and control method thereof |
-
2020
- 2020-10-29 CN CN202022452235.8U patent/CN213633264U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326742A (en) * | 2020-10-29 | 2021-02-05 | 国网山西省电力公司吕梁供电公司 | Oil micro-water analyzer and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101713810B (en) | Test unit for monitoring oil-paper insulation state | |
| CN105424890B (en) | A kind of improved transformer insulating paper moisture appraisal procedure | |
| CN102981120A (en) | Full-performance detecting system of magnetic latching relay and detecting method thereof | |
| CN213633264U (en) | Little water analyzer of oil | |
| CN104375082A (en) | Intelligent SF6 density relay calibration device and method | |
| CN103576075B (en) | The device and method that mainboard detects automatically | |
| CN111751620B (en) | Self-adaptive detection method for primary circuit of circuit breaker | |
| CN208459884U (en) | A kind of accelerated degradation test system of electric energy meter | |
| CN111596205A (en) | Relay service life prediction test system based on degradation sensitive parameter change trend analysis | |
| CN102628735A (en) | Device and method for testing heat resistance of light-emitting diode (LED) | |
| CN102095765A (en) | System for measuring content of micro water in transformer oil on line | |
| CN112326742A (en) | Oil micro-water analyzer and control method thereof | |
| CN113359000A (en) | Online aging testing device | |
| CN112255478A (en) | Automatic detection and service life evaluation system for aging state of generator stator bar | |
| CN115656787B (en) | PCBA test method and device | |
| CN116520098A (en) | Insulation detection method and circuit simulation method of differential frequency signal injection principle | |
| CN107064239A (en) | A kind of method that transformer insulating paper conductance property is analyzed based on differential charge | |
| CN111025103A (en) | Aging performance evaluation system for intelligent silicon rubber composite insulator | |
| CN102866312B (en) | Intelligent card reader-writer power failure test capturing method based on current mutation and reader-writer | |
| CN104977048A (en) | FCT automatic testing method for air conditioner | |
| CN111781494B (en) | Improved automatic on-line detection method and device for mechanical characteristics of circuit breaker | |
| CN115290165A (en) | Detection method, system and device of ultrasonic water meter | |
| CN2889105Y (en) | Electronic dry-heating proof device of drinking water machine | |
| CN205427124U (en) | Testing arrangement of electrical equipment and insulating material return voltage | |
| CN203148914U (en) | Pipeline device applicable to gas analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |