CN209471882U - A kind of digital SF6 density monitor - Google Patents
A kind of digital SF6 density monitor Download PDFInfo
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- CN209471882U CN209471882U CN201821974133.9U CN201821974133U CN209471882U CN 209471882 U CN209471882 U CN 209471882U CN 201821974133 U CN201821974133 U CN 201821974133U CN 209471882 U CN209471882 U CN 209471882U
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- temperature
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
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- 230000035939 shock Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
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- 238000012935 Averaging Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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Abstract
The utility model discloses a kind of digital SF6 density monitors, it is formed including sensor module, watch glasses, digital display screen, circuit board assemblies, aviation connector and watchcase, the front of circular watchcase is equipped with digital display screen by sealing ring cover conjunction, sensor module includes temperature sensor and pressure sensor, and insulated column passes through M3 nut mounting circuit boards component；Circuit board assemblies include controller, LED charactrons and keyboard input module, the output end of temperature sensor and pressure sensor is electrically connected to the input terminal of controller, the input terminal of controller is electrically connected to the output end of keyboard input module, and controller is also electrically connected with LED charactrons.The utility model can solve the artificial error in reading problem of hand of dial, and compare control relay output set point switching value, and precision is high, and repeatability and consistency are good, and shock resistance is strong, and controller calculates density value in real time, and the temperature-compensating time difference is not present.
Description
Technical field
The utility model relates to SF6 density monitor technical field, specially a kind of digital SF6 density monitor.
Background technique
In recent years, as rapid economic development, China's power system capacity sharply expand, SF6 electrical equipment consumption is more next
It is more.SF6 electrical equipment has been widely used the fast development that power industry is promoted in power department, industrial and mining enterprises.In order to protect
The reliability service of SF6 electrical equipment is demonstrate,proved, the continuous reliability service ability of electric system, their performance online state-detections, prison are improved
Survey and failure predication become important research direction in the application of SF6 electrical equipment.
The arc-extinguishing medium and dielectric of SF6 electrical equipment is SF6 gas, and gas leakage and SF6 gas occur for SF6 electrical equipment
The exceeded safe operation for seriously affecting SF6 electrical equipment of the micro-water content of body.As unattended operation transformer station is to networking, number
Change development and to remote signalling, remote control, telemetering requirement, the SF6 gas micro water content of online long-range monitoring SF6 electrical equipment and leakage
Gaseity has very important realistic meaning.
In practice, it is usually the monitoring being converted into pressure that the direct monitoring of density is not easy to realize to engineering.Even if but
When being density constant, the pressure of SF6 gas will also change with temperature.Therefore, in order to accurately reflect pressure change be due to
Caused by gas leakage rather than temperature change, just pressure indicating meter must be kept no matter extraneous by temperature-compensating or modified method
How temperature changes, and registration is always corresponding 20 DEG C of normal pressure, and the value is equivalent to the density value of SF6 gas in gas chamber
So as to compared with reference value.By upper analysis it is found that SF6 gas density is on-line monitoring system needs 2 spies of temperature collection and pressure
Sign amount, and this 2 characteristic quantity signals are handled to complete entire on-line monitoring process.
Previous substation equipment repair based on condition of component is to rely on artificial regular visit, and determine the operating status of equipment.It needs to pacify
Full-time staff is arranged, a large amount of human costs are occupied.And regular visit tends not to timely discovering device unusual condition.With intelligence
Change the development of power grid, the intellectualized reconstruction of this tradition substation is also just particularly necessary and urgent.It is previously mentioned in intelligent power network
Equipment state on-line monitoring, be the status information that equipment is acquired by various sensors.It is realized by networking communication online
Monitoring and automatic alarm, can also grasp equipment state in time in the case where unattended.The throwing of human resources can be greatly reduced
Enter, and can realize equipment fault Realtime Alerts.So as to arrange to overhaul in time, it can more accurately prevent the generation of accident.
Mechanical SF6 density monitor or mechanical integrated telemetering type SF6 are generallyd use in substation equipment in the past
Density monitor.Its mechanical part has temperature-compensating low-response, shock resistance poor, and easily malfunction, pointing accuracy are not high enough, deposits
It is with uniformity poor in error in reading, contact, there is the disadvantages of upper and lower differential gap.
Utility model content
The purpose of this utility model is to provide a kind of digital SF6 density monitor, the utility model can solve table
The artificial error in reading problem of index, and control relay output set point switching value is compared, precision is high, repeatability and one
Cause property is good, and shock resistance is strong, and controller calculates density value in real time, and the temperature-compensating time difference is not present, can solve the prior art
The problems in.
To achieve the above object, the utility model provides the following technical solutions: a kind of digital SF6 density monitor, packet
Sensor module, watch glasses, digital display screen, circuit board assemblies, aviation connector and watchcase composition are included, circular watchcase is just
Face is equipped with digital display screen by sealing ring cover conjunction, and the outer surface of watchcase is covered by watch glasses, and the bottom of the watchcase is inserted vertically
It is connected to the sensor module extended to inside watchcase, sensor module includes temperature sensor and pressure sensor, the bottom of watchcase
Portion and sensor module contact position are equipped with liner plate, are provided with screw rod at the top of the sensor module, on the inner wall of the watchcase
Equipped with M4 plain washer, through there is the insulated column for being fixed in watchcase on M4 plain washer, the insulated column installs circuit by M3 nut
Board group part is separated between M3 nut and circuit board assemblies by M4 felt pad, and the side of the watchcase is screwed by hex nut
Aviation connector；
The circuit board assemblies include controller, LED charactrons and keyboard input module, and temperature sensor and pressure pass
The output end of sensor is electrically connected to the input terminal of controller, and the input terminal of controller is electrically connected to the output of keyboard input module
End, controller are also electrically connected with LED charactrons, and LED charactrons are electrically connected with digital display screen, and the output end of controller is set
The output of definite value switching signal, controller use RS485 and MODBUS communications protocol, can facilitate access electric integrated automatic monitoring
Monitoring system.
Further, the model FXM100/DT of the controller.
Further, the controller uses 32-bit number cpu signal processor.
Further, the included 12 A/D acquisition chips of the processor acquire pressure and temperature signal.
Further, the temperature sensor uses the wide scope thermocouple with temperature-compensating.
Further, the pressure sensor uses the wide range pressure sensor with temperature-compensating, pressure sensor
For the sensor of silicon piezoresistance type.
Compared with prior art, the beneficial effects of the utility model are as follows:
1. the digital SF6 density monitor of the utility model, circuit board assemblies include LED charactrons, LED charactrons
It is electrically connected with digital display screen, density is calculated with the speed of every 10ms and refreshed after obtaining real-time pressure value and temperature value, is refreshed
The real-time display in digital display screen of numerical value afterwards solves the problems, such as the artificial error in reading of hand of dial；
2. the digital SF6 density monitor of the utility model, the model FXM100/DT of controller, controller is with height
Performance 32-bit number cpu signal processor is core, acquires pressure and temperature using 12 A/D acquisition chips that processor carries
Signal compares control relay and exports set point switching value, and precision is high, and repeatability and consistency are good, and shock resistance is strong；
3. the digital SF6 density monitor of the utility model, sensor module includes temperature sensor and pressure sensing
Device, built-in temperature pressure integrated sensor, controller calculate density value in real time, and the temperature-compensating time difference is not present, this is practical
The novel Modbus RTU slave computer also having the function of based on RS485 bus can instruct real-time response host computer according to host computer.
Detailed description of the invention
Fig. 1 is the front view of the utility model；
Fig. 2 is the A-A of the utility model to cuing open figure；
Fig. 3 is the circuit board assemblies functional block diagram of the utility model.
In figure: 1, sensor module；101, temperature sensor；102, pressure sensor；2, screw rod；3, watch glasses；4, digital
Display screen；5, sealing ring；6, insulated column；7, circuit board assemblies；71, controller；72, LED charactrons；73, keyboard input module；
8, M3 nut；9, M4 felt pad；10, M4 plain washer；11, aviation connector；12, liner plate；13, hex nut；14, watchcase.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of digital SF6 density monitor, including sensor module 1, watch glasses 3, digital display screen 4,
Circuit board assemblies 7, aviation connector 11 and watchcase 14 form, and installation is closed by the lid of sealing ring 5 in the front of circular watchcase 14
It statistics have shown that screen 4, sealing ring 5 can play sealing function, prevent from entering dust in watchcase 14, the outer surface of watchcase 14 is by table
Cover 3 covers, and the bottom of watchcase 14 is plugged with the sensor module 1 extended to inside watchcase 14 vertically, and sensor module 1 includes temperature
Degree sensor 101 and pressure sensor 102, the dedicated integrated sensor of customization, all-welded structure can meet < 1 × 10- 9Pa·m3The leak rate requirement of/s (helium leak check), the bottom and 1 contact position of sensor module of watchcase 14 are equipped with liner plate 12, liner plate 12
It can play the role of reinforcing to sensor module 1, the top of sensor module 1 is provided with screw rod 2, and screw rod 2 can be used for adjusting
Sensor module 1 is saved, the inner wall of watchcase 14 is equipped with M4 plain washer 10, runs through to have being fixed in the exhausted of watchcase 14 on M4 plain washer 10
Edge column 6, insulated column 6 can prevent circuit board assemblies 7 from connecing with watchcase 14 by 8 mounting circuit boards component 7 of M3 nut, insulated column 6
Touching is separated by M4 felt pad 9 between M3 nut 8 and circuit board assemblies 7, prevents M3 nut 8 from damaging electricity during turn
Road board group part 7, the side of watchcase 14 screw aviation connector 11 by hex nut 13, aviation connector 11 for relay with
External device connection.
Fig. 2-3 is please referred to, circuit board assemblies 7 include controller 71, LED charactrons 72 and keyboard input module 73, control
The model FXM100/DT of device 71 processed, controller 71 utilize processing using high-performance 32-bit number cpu signal processor as core
12 included A/D acquisition chips of device acquire pressure and temperature signal, compare control relay and export set point switching value, precision
Height, repeatability and consistency are good, and shock resistance is strong, and the output end of temperature sensor 101 and pressure sensor 102 is electrically connected to
The input terminal of controller 71, temperature sensor 101 are adopted using the wide scope thermocouple with temperature-compensating, pressure sensor 102
With the wide range pressure sensor with temperature-compensating, absolute pressure is converted to 20 according to obtained pressure, temperature real value
Pressure value at DEG C replaces gas density (Beattie-Bridgman empirical equation), and the pressure sensor 102 of use is based on electricity
Strain-type shaft principle is hindered, when use need to only provide it the constant current of high-precision, Low Drift Temperature, and reflection gas pressure can be obtained
The voltage signal of power, pressure sensor 102 are the sensor of silicon piezoresistance type, and the input terminal of controller 71 is electrically connected to key-press input
The output end of module 73, controller 71 are also electrically connected with LED charactrons 72, and LED charactrons 72 are electrically connected with digital display screen 4,
Vertically by 4 real-time display of digital display screen, the artificial error in reading of hand of dial is solved the problems, such as, the output end of controller 71 is set
The output of definite value switching signal, controller 71 use RS485 and MODBUS communications protocol, can facilitate access electric integrated automatic prison
Depending on monitoring system, which uses the microprocessor technology of Special industrial sensor and rapid development, realizes non-electric charge quantity signalling
Acquisition and treatment process meet digitlization required by smart grid, information-based requirement, have good promotion prospect.
Working principle: tested SF6 gas enters sensor from the gas circuit of sensor module 1, and temperature sensor 101 and pressure pass
Sensor 102 incudes its pressure and temperature, pressure sensor 102 are the sensors of silicon piezoresistance type, is provided it by circuit board assemblies 7
1.5mA constant-current supply, and the differential voltage signal of a pair of of difference about 0~100mV is exported, it is transported by the instrument of circuit board assemblies 7
It puts after chip is amplified to 0~3V and accesses on 12 included ADC module channels of controller 71, controller 71 controls ADC module
For automatically scanning translative mode, and algorithm value is averaging by sliding in software；Temperature sensor 101 uses high-precision temperature-sensitive
Resistance, the sampling resistor series winding component temperature sample circuit with circuit board assemblies 7, the circuit provide 3.3V voltage by circuit board,
Partial pressure on thermistor is directly accessed the included ADC module of single-chip microcontroller, by being calculated real-time resistance value, then with temperature-resistance
Current Temperatures are exported after table matching；Density is calculated and is refreshed with the speed of every 10ms after obtaining real-time pressure value and temperature value,
Numerical value after the refreshing real-time display in digital display screen 4, and the folding shape for determining three group relays is compared with setting value simultaneously
State.
In summary: the digital SF6 density monitor of the utility model, circuit board assemblies 7 include LED charactrons
72, LED charactrons 72 are electrically connected with digital display screen 4, and density is after obtaining real-time pressure value and temperature value, with the speed of every 10ms
Degree, which calculates, to be refreshed, and the real-time display in digital display screen 4 of the numerical value after refreshing solves the problems, such as the artificial error in reading of hand of dial；
The model FXM100/DT of controller 71, controller 71 utilize place using high-performance 32-bit number cpu signal processor as core
It manages 12 included A/D acquisition chips of device and acquires pressure and temperature signal, compare control relay and export set point switching value, essence
Degree is high, and repeatability and consistency are good, and shock resistance is strong；Sensor module 1 includes temperature sensor 101 and pressure sensor
102, built-in temperature pressure integrated sensor, controller 71 calculates density value in real time, and temperature-compensating time difference, this reality is not present
With the novel Modbus RTU slave computer also having the function of based on RS485 bus, real-time response can be instructed upper according to host computer
Machine.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of digital SF6 density monitor, including sensor module (1), watch glasses (3), digital display screen (4), circuit board
Component (7), aviation connector (11) and watchcase (14) composition, it is characterised in that: the front of circular watchcase (14) passes through close
Seal (5) lid, which closes, to be equipped with digital display screen (4), and the outer surface of watchcase (14) is covered by watch glasses (3), the bottom of the watchcase (14)
Portion is plugged with vertically extends to the internal sensor module (1) of watchcase (14), and sensor module (1) includes temperature sensor
(101) and pressure sensor (102), the bottom and sensor module (1) contact position of watchcase (14) are equipped with liner plate (12), the biography
It is provided at the top of sensor component (1) screw rod (2), the inner wall of the watchcase (14) is equipped with M4 plain washer (10), M4 plain washer
(10) through there is the insulated column (6) for being fixed in watchcase (14) on, the insulated column (6) passes through M3 nut (8) mounting circuit boards group
Part (7) is separated between M3 nut (8) and circuit board assemblies (7) by M4 felt pad (9), and the side of the watchcase (14) passes through
Hex nut (13) screws aviation connector (11)；
The circuit board assemblies (7) include controller (71), LED charactrons (72) and keyboard input module (73), and temperature passes
The output end of sensor (101) and pressure sensor (102) is electrically connected to the input terminal of controller (71), the input of controller (71)
End is electrically connected to the output end of keyboard input module (73), and controller (71) is also electrically connected with LED charactrons (72), and LED is digital
Pipe (72) is electrically connected with digital display screen (4), and the output end of controller (71) carries out the output of setting value switching signal, controller
(71) RS485 and MODBUS communications protocol is used, access electric integrated automatic surveillance and monitoring system can be facilitated.
2. a kind of digital SF6 density monitor according to claim 1, it is characterised in that: the controller (71)
Model FXM100/DT.
3. a kind of digital SF6 density monitor according to claim 1 or 2, it is characterised in that: the controller (71)
Using 32-bit number cpu signal processor.
4. a kind of digital SF6 density monitor according to claim 3, it is characterised in that: the processor included 12
Position A/D acquisition chip acquires pressure and temperature signal.
5. a kind of digital SF6 density monitor according to claim 1, it is characterised in that: the temperature sensor
(101) using the wide scope thermocouple with temperature-compensating.
6. a kind of digital SF6 density monitor according to claim 1, it is characterised in that: the pressure sensor
(102) using the wide range pressure sensor with temperature-compensating, pressure sensor (102) is the sensor of silicon piezoresistance type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974133.9U CN209471882U (en) | 2018-11-28 | 2018-11-28 | A kind of digital SF6 density monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974133.9U CN209471882U (en) | 2018-11-28 | 2018-11-28 | A kind of digital SF6 density monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209471882U true CN209471882U (en) | 2019-10-08 |
Family
ID=68089055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821974133.9U Expired - Fee Related CN209471882U (en) | 2018-11-28 | 2018-11-28 | A kind of digital SF6 density monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209471882U (en) |
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2018
- 2018-11-28 CN CN201821974133.9U patent/CN209471882U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191008 |