CN110501260A - A kind of gas density relay and its method of calibration with online self checking function - Google Patents
A kind of gas density relay and its method of calibration with online self checking function Download PDFInfo
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- CN110501260A CN110501260A CN201910834404.3A CN201910834404A CN110501260A CN 110501260 A CN110501260 A CN 110501260A CN 201910834404 A CN201910834404 A CN 201910834404A CN 110501260 A CN110501260 A CN 110501260A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
- G01N9/266—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences for determining gas density
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
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Abstract
The application provides a kind of gas density relay and its method of calibration with online self checking function, for high pressure, middle voltage electrical equipment, including gas density relay ontology, gas density detection sensor, normally open valve, normally close valve, gas chamber, on-line testing contact point signal sampling unit and intelligence control unit.Pass through normally open valve, normally close valve, the lifting of gas chamber realization gas pressure, so that contact point signal movement occurs for gas density relay ontology, contact point signal movement is transmitted to intelligence control unit by on-line testing contact point signal sampling unit, density value when intelligence control unit is acted according to contact point signal, it detects the alarm of gas density relay ontology and/or is latched contact point signal action value and/or return value, the verifying work of gas density relay can be completed to scene without service personnel, it realizes non-maintaining, substantially increase the reliability of power grid, improve efficiency, it reduces costs.Gas zero-emission, Environmental Safety economy are realized in entire checking procedure simultaneously.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to and it is a kind of to apply in high pressure, middle voltage electrical equipment, have online
The gas density relay and its method of calibration of self checking function.
Background technique
Currently, SF6 (sulfur hexafluoride) electrical equipment has been widely used in power department, industrial and mining enterprises, electric power row is promoted
The fast development of industry.In recent years, with rapid economic development, China's power system capacity sharply expands, SF6 electrical equipment consumption
It is more and more.Effect of the SF6 gas in high voltage electric equipment is arc extinguishing and insulation, and SF6 gas is close in high voltage electric equipment
If degree reduces and the exceeded safe operation that will seriously affect SF6 high voltage electric equipment of micro-water content: 1) SF6 gas density is reduces
To the forfeiture that will lead to insulation and arc extinction performance to a certain degree.2) in the presence of some metal objects, SF6 gas is in high temperature 200
With water hydrolysis can occur for DEG C temperatures above, generate active HF and SOF2, etching insulative part and metalwork, and generate a large amount of
Heat increases air chamber pressure.3) when temperature reduces, excessive moisture content is likely to form condensation water, makes insulating part surface insulation
Intensity significantly reduces or even flashover, causes to seriously endanger.Therefore grid operation codes mandatory provision, before putting equipment in service and is transported
In row must all periodic detection be carried out to the bulk density and water content of SF6 gas.
With unattended operation transformer station to networking, digitlization direction develop and to remote control, telemetering requirement constantly add
By force, so the on-line monitoring of gas density and micro-water content state to SF6 electrical equipment has important practical significance.With
Chinese smart grid is constantly greatly developed, important component and key of the intelligent high-pressure electrical equipment as intelligent substation
Node plays very important effect to the safety of smart grid.High voltage electric equipment is mostly that SF6 gas-insulated is set at present
It is standby, if gas density reduces and (such as leak and cause) electric property that will seriously affect equipment, safe operation is caused seriously
Hidden danger.Gas density value at present in on-line monitoring SF6 high voltage electric equipment is very universal, thus gas density monitoring system
System (gas density relay) application will flourish.And current gas density monitoring system (gas density relay) is basic
On be: 1) using telemetering type SF6 gas density is relay realize density, pressure and temperature acquisition, upload, realize gas density
On-line monitoring.2) acquisition that density, pressure and temperature are realized using gas density transmitter, uploads, and realizes that gas density is online
Monitoring.SF6 gas density is relay is core and critical component.But due to high voltage substation scene operation bad environments,
Especially electromagnetic interference is very strong, in gas density monitoring system (gas density relay) used at present, telemetering type SF6
Gas density relay is made of mechanical density monitor and electronic long-distance transmission part；In addition, using gas density pick-up
In the network system of device, all also retain traditional mechanical density monitor.The mechanical density monitor have one group, two groups or
Information can be passed through contact in time and connect circuit biography by three groups of mechanical contacts in the state of pressure arrival alarm, locking or superpressure
It is sent to target device terminal, guarantees equipment safety operation.Meanwhile monitoring system is also equipped with safe and reliable circuit transmitting function,
Establish active platform with information monitoring to realize that real time data teledata is read, can by information such as pressure, temperature, density and
When be transmitted to target device (generally computer terminal) realize on-line monitoring.
Periodic inspection is carried out to the gas density relay on electrical equipment, is to prevent trouble before it happens, ensures electrical equipment peace
The requisite measure of full reliability service." electric power preventive trial regulation " and " prevent 25 Xiang Chong of power generation major accident
Point requires " it requires and regularly gas density relay is verified.From the point of view of practical operation situation, to gas density after
It is to ensure one of power equipment safety, necessary means of reliability service that electric appliance, which carries out periodic check,.Therefore, at present gas density after
The verification of electric appliance has been paid much attention to and has been popularized in electric system, and each power supply company, power plant, large factories and mines enterprises are all real
It applies.And power supply company, power plant, large factories and mines enterprises are to complete the field-checking detection work of gas density relay to need to be equipped with
The SF6 gas of tester, equipment vehicle and high value.Including power failure operating loss when detection, rough calculation, each
The testing cost of high voltage switchyard shared every year about arrives hundreds of thousands member or so tens of thousands of.In addition, testing staff's field-checking is such as
Fruit non-standard operation, there is also security risks.For this purpose, very necessary in existing gas density self checking gas density relay
It in the online self checking gas density relay of device, especially gas density or system, is innovated, makes to realize that gas density is online
Also with the verifying function of gas density relay in the gas density relay of monitoring or the monitoring system of composition, and then complete
The periodic check of (mechanical) gas density relay works, and without service personnel to scene, greatly improves work efficiency, and drops
Low cost.Entire checking procedure needs Environmental Safety.
Summary of the invention
The purpose of the present invention is to provide a kind of gas density relay with online self checking function and its verification sides
Method, to solve the problems, such as to propose in above-mentioned technical background.
To achieve the above object, the invention adopts the following technical scheme:
The application first aspect provides a kind of gas density relay with online self checking function, comprising: gas
Volume density relay ontology, gas density detection sensor, normally open valve, normally close valve, gas chamber, the sampling of on-line testing contact point signal are single
Member and intelligence control unit；
One end of the normally close valve is connected with the gas circuit of the gas density relay ontology, the normally close valve it is another
End is connected with the gas chamber；The gas chamber and normally close valve are configured as establishing or storing the gas of low-pressure, adjust the gas
The pressure of volume density relay ontology declines, and makes the gas density relay ontology that contact point signal movement occur；
One end of the normally open valve is equipped with the interface being connected with electrical equipment, the other end of the normally open valve and the gas
The gas circuit of volume density relay ontology is connected or the other end of the normally open valve connects the gas circuit of the normally close valve, thus
The normally open valve is connected with the gas circuit of the gas density relay ontology；The normally open valve is configured as turning off or on
The gas circuit of electrical equipment, the gas circuit for completing electrical equipment is closed, and adjusts the pressure liter of the gas density relay ontology
Height makes the gas density relay ontology that contact point signal occur and resets；
The gas density detection sensor is connected to the gas density relay ontology；
The on-line testing contact point signal sampling unit is connected with the gas density relay ontology, is configured as
Sample the contact point signal of the gas density relay ontology；
The intelligence control unit, respectively with the normally open valve, normally close valve, gas density detection sensor and the on-line testing
Contact point signal sampling unit is connected, and is configured as controlling turning off or on for the normally open valve, controls the pass of the normally close valve
It closes or opens, pressure value acquisition and temperature value acquisition, and/or gas density value acquire, and the detection gas density relay
The contact point signal action value and/or contact point signal return value of device ontology；
Wherein, the contact point signal includes alarm, and/or locking.
The application the second aspect provides a kind of gas density detecting device with online self checking function, comprising:
Gas density relay ontology, gas density detection sensor, normally open valve, normally close valve, gas chamber, the sampling of on-line testing contact point signal
Unit and intelligence control unit；
One end of the normally close valve is connected with the gas circuit of the gas density relay ontology, the normally close valve it is another
End is connected with the gas chamber；The gas chamber and normally close valve are configured as establishing or storing the gas of low-pressure, adjust the gas
The pressure of volume density relay ontology declines, and makes the gas density relay ontology that contact point signal movement occur；
One end of the normally open valve is equipped with the interface being connected with electrical equipment, the other end of the normally open valve and the gas
The gas circuit of volume density relay ontology is connected or the other end of the normally open valve connects the gas circuit of the normally close valve, thus
The normally open valve is connected with the gas circuit of the gas density relay ontology；The normally open valve is configured as turning off or on
The gas circuit of electrical equipment, the gas circuit for completing electrical equipment is closed, and adjusts the pressure liter of the gas density relay ontology
Height makes the gas density relay ontology that contact point signal occur and resets；
The gas density detection sensor is connected to the gas density relay ontology；
The on-line testing contact point signal sampling unit is connected with the gas density relay ontology, is configured as
Sample the contact point signal of the gas density relay ontology；
The intelligence control unit, respectively with the normally open valve, normally close valve, gas density detection sensor and the on-line testing
Contact point signal sampling unit is connected, and is configured as controlling turning off or on for the normally open valve, controls the pass of the normally close valve
It closes or opens, pressure value acquisition and temperature value acquisition, and/or gas density value acquire, and the detection gas density relay
The contact point signal action value and/or contact point signal return value of device ontology；
Wherein, the contact point signal includes alarm, and/or locking.
Preferably, the gas density relay ontology includes but is not limited to the gas density relay of bimetallic strip compensation
Device, the gas density relay of gas compensation, bimetal leaf and gas compensation mixed type gas density relay；Complete mechanical
Gas density relay, numeric type gas density relay, machinery and digital mating type gas density relay；Band pointer
The gas density relay of display, digital display gas density relay, without the gas density switch of display or instruction；SF6 gas
Volume density relay, SF6 mixed gas density monitor, N2 gas density relay.
Preferably, the gas density relay ontology includes: shell, and be disposed in the housing pedestal, pressure
Detector, temperature compensating element, several signal generators；Wherein, the signal generator includes microswitch or magnetic auxiliary electricity
Contact, the gas density relay ontology pass through the signal generator output contact signal；The pressure detector includes
Baden pipe or bellows；The temperature compensating element is using temperature-compensating plate or the gas of shell inner sealing.
It is highly preferred that the gas circuit of the normally close valve is connected with the pressure detector；The other end of the normally open valve with
The pedestal, the pressure detector are connected or the other end of the normally open valve connects the gas circuit of the normally close valve, thus
The normally open valve is connected with the pedestal, the pressure detector；The on-line testing contact point signal sampling unit and institute
Signal generator is stated to be connected.
It is highly preferred that the gas density relay ontology further includes indication mechanism, the indication mechanism includes machine core, refers to
Needle, dial, the machine core are fixed on the pedestal or in shell；The other end of the temperature compensating element also passes through connecting rod
It connect with the machine core or is directly connect with the machine core；The pointer be installed on the machine core and be set to the dial it
Before, the pointer shows gas density value in conjunction with the dial；And/or the indication mechanism includes the number that there is indicating value to show
Code device or liquid crystal device.
It is highly preferred that the gas density relay ontology or intelligence control unit further include contact resistance detection unit, it is described
Contact resistance detection unit is connected with contact point signal or is directly connected with signal generator；It is adopted in on-line testing contact point signal
Under the control of sample unit, the contact point signal of gas density relay ontology is isolated with its control loop, in gas density relay
When the contact point signal of ontology acts, and/or when being connected to the instruction of detection contact contact resistance, contact resistance detection unit
It is able to detect that the contact contact resistance value of gas density relay ontology.
It is highly preferred that the gas density relay ontology or intelligence control unit further include insulation resistance detection unit, it is described
Insulation resistance detection unit is connected with contact point signal or is directly connected with signal generator；It is adopted in on-line testing contact point signal
Under the control of sample unit, the contact point signal of gas density relay ontology is isolated with its control loop, in gas density relay
When the contact point signal of ontology acts, and/or when being connected to the instruction of detection contact insulation resistance, insulation resistance detection unit
It is able to detect that the contact insulating resistance value of gas density relay ontology.
Preferably, the gas density detection sensor is arranged on the gas density relay ontology；Alternatively, described
Normally close valve, gas chamber are arranged on the gas density relay ontology；Alternatively, the gas density detection sensor, it is described
Line verifies contact point signal sampling unit and the intelligence control unit is arranged on the gas density relay ontology；Alternatively, described
Normally close valve, gas chamber, the gas density detection sensor, the on-line testing contact point signal sampling unit and the intelligence control unit
It is arranged on the gas density relay ontology.
It is highly preferred that the gas density relay ontology, the gas density detection sensor are integrated；Or
Person, the telemetering type gas density that the gas density relay ontology, the gas density detection sensor are integrated
Relay.
Preferably, the gas density detection sensor is integrated；Alternatively, the gas density detection sensor
The gas density transmitter being integrated.
It is highly preferred that the on-line testing contact point signal sampling unit, the intelligence control unit are arranged in the gas density
On transmitter.
Preferably, the gas density detection sensor includes at least one pressure sensor and at least one temperature sensing
Device；Alternatively, using the gas density transmitter being made of pressure sensor and temperature sensor；Alternatively, using quartz tuning-fork skill
The density detection sensor of art.
It is highly preferred that the pressure sensor is installed in the gas circuit of the gas density relay ontology.
It is highly preferred that the temperature sensor is installed in the gas circuit of the gas density relay ontology or outside gas circuit,
Or in the gas density relay ontology or the gas density relay sheet is external.
It is highly preferred that temperature sensor can be thermocouple, thermistor, semiconductor-type；It can be with contact and non-contact
Formula；It can be thermal resistance and thermocouple.
It is highly preferred that the temperature that the gas density relay ontology is arranged at least one described temperature sensor is mended
It repays element nearby or is arranged on temperature compensating element, or be integrated in the temperature compensating element.Preferably, at least one
The pressure detector of the gas density relay ontology is arranged in close to the one of temperature compensating element in a temperature sensor
End.
It is highly preferred that the pressure sensor includes but is not limited to relative pressure sensor and/or absolute pressure sensor
Device.
Further, it when the pressure sensor is absolute pressure transducer, is indicated with absolute pressure value, verification knot
Fruit is corresponding 20 DEG C of absolute pressure value, is indicated with relative pressure, and check results are converted into corresponding 20 DEG C of phase
To pressure value；
When the pressure sensor is relative pressure sensor, indicated with relative pressure, check results are corresponding
20 DEG C of relative pressure, indicated with absolute pressure value, check results are converted into corresponding 20 DEG C of absolute pressure value；
Conversion relation between the absolute pressure value and the relative pressure are as follows:
PAbsolute pressure=PRelative pressure+PStandard atmospheric pressure。
Further, the pressure sensor can also be diffusion silicon pressure sensor, MEMS pressure sensor, chip type
Pressure sensor, coil-induced pressure sensor (pressure sensor that such as Baden pipe is attached to induction coil), resistor pressure sensing
Device (pressure sensor that such as Baden pipe is attached to slide wire resistance)；It can be analog quantity pressure sensor, be also possible to digital quantity pressure
Force snesor.
Preferably, the on-line testing contact point signal sampling unit and the intelligence control unit are set together.
It is highly preferred that the on-line testing contact point signal sampling unit and the intelligence control unit are sealed in a cavity or shell
In vivo.
Preferably, the normally close valve and/or normally open valve are sealed in a cavity or shell.
Preferably, the outside or inside of the gas chamber is equipped with heating element, and the heating element is connected with intelligence control unit,
By heating the heating element, the temperature of the indoor gas of the gas is caused to increase, and then complete the gas indoor gas
Density decline makes the gas chamber and normally close valve establish or store the gas of low-pressure.
It is highly preferred that the gas chamber further includes heat preservation member, the heat preservation member is set to the outside of the gas chamber.
It is highly preferred that the gas density relay ontology further includes the flow valve for controlling gas release flow.
Preferably, the normally open valve or normally close valve are motor-driven valve, or are solenoid valve, or are piezo electric valve, or control for temperature
Valve, or be using the production of the intelligent memory material, new type of valve that is opened or closed using electric heating.
Preferably, the gas density relay or monitoring device further include flow controller, the flow controller quilt
It is configured to the uninterrupted of control gas；The flow controller is arranged in normally open valve side or normally close valve side；Alternatively, described
A flow controller is respectively arranged in normally open valve side and normally close valve side.
Preferably, the normally close valve and the air chamber sealing are in a cavity or shell.
Preferably, the gas circuit two sides of the normally open valve or normally close valve are respectively arranged with pressure sensor.
Preferably, the electrical equipment includes SF6 outlet openings equipment, SF6 mixed gas electrical equipment, environment-friendly type gas
Electrical equipment or other insulating gas electrical equipments.
Specifically, the electrical equipment includes GIS, GIL, PASS, breaker, current transformer, voltage transformer, transformation
Device, gas-filling cabinet, ring network cabinet.
Preferably, the normally open valve is connected by electrical equipment jointing with the electrical equipment.
Preferably, contact point signal of the on-line testing contact point signal sampling unit to the gas density relay ontology
Sampling meets:
The on-line testing contact point signal sampling unit has independent at least one set of sampling contact, can be simultaneously at least one
A contact is automatically performed verification, and continuously measures, need not replace contact or reselect contact；Wherein,
The contact including but not limited to alarm contact, alarm contact+locking contact, alarm contact+1 contact of locking+are closed
Lock one of 2 contacts, alarm contact+locking contact+superpressure contact.
Preferably, contact point signal of the on-line testing contact point signal sampling unit to the gas density relay ontology
The test voltage of action value or its switching value is not less than 24V, i.e., in verification, applies between contact point signal respective terminal not low
In 24V voltage.
Preferably, the intelligence control unit obtains the gas density value of the gas density detection sensor acquisition；Alternatively, institute
Pressure value and temperature value that intelligence control unit obtains the gas density detection sensor acquisition are stated, the gas density relay is completed
Device completes the gas density relay to the gas density of the electrical equipment monitored to the on-line monitoring of gas density
On-line monitoring.
It is highly preferred that the intelligence control unit calculates the gas density value, the mean value using averaging method (mean value method)
Method are as follows: in the time interval of setting, frequency acquisition is set, by N number of gas density of the different time points all collected
Value carries out mean value calculation processing, obtains its gas density value；Alternatively, being walked at the time interval of setting, set temperature interval
It is long, density value corresponding to the N number of different temperatures value collected in whole temperature ranges is carried out mean value calculation processing, is obtained
To its gas density value；Alternatively, time interval, setting pressure intervals step-length in setting, in whole pressure ranges
Density value corresponding to the N number of different pressures value collected carries out mean value calculation processing, obtains its gas density value；Its
In, N is the positive integer more than or equal to 1.
Preferably, the intelligence control unit obtains the gas density relay ontology and contact point signal movement occurs or switches
When, the gas density detection sensor acquisition gas density value, complete the on-line testing of the gas density relay；Or
Person,
The intelligence control unit obtains gas density relay ontology when occurring contact point signal movement or switching, the gas
The pressure value and temperature value of volume density detection sensor acquisition, and become 20 DEG C corresponding according to gas pressure-temperature Characteristic conversion
Pressure value, i.e. gas density value completes the on-line testing of the gas density relay.
Preferably, the gas density relay ontology is exported with density value output signal, the comparison density value is compared
Signal is connected with the intelligence control unit；Alternatively, the gas density relay ontology is somebody's turn to do with pressure value output signal is compared
Pressure value output signal is compared to be connected with the intelligence control unit.
Preferably, the intelligence control unit embeds algorithm and control program based on the embedded system of microprocessor, automatic to control
Entire checking procedure is made, includes all peripheral hardwares, logic and input and output.
It is highly preferred that the intelligence control unit be based on general purpose computer, industrial personal computer, ARM chip, AI chip, CPU, MCU,
The embedded algorithm such as FPGA, PLC etc., industrial control mainboard, embedded main control board and control program, automatically control entire checking procedure, wrap
Containing all peripheral hardwares, logic and input and output.
Preferably, the intelligence control unit is equipped with electric interfaces, and the electric interfaces complete test data storage, and/or survey
Data export and/or test data printing are tried, and/or carries out data communication, and/or input analog quantity, digital quantity with host computer
Information.
It is highly preferred that the base of gas density relay (or gas density detecting device) the Support gas density monitor
This information input, the essential information include but is not limited to factory number, required precision, nominal parameter, manufactory, operating position
One or more of set.
Preferably, the intelligence control unit further includes the communication mould for realizing remote transmitting test data, and/or check results
Block.
It is highly preferred that the communication modes of the communication module are wire communication or wireless communication mode.
Further, the wire communication mode includes but is not limited to RS232 bus, RS485 bus, CAN-BUS total
One or more of line, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier, cable.
Further, the wireless communication mode include but is not limited to NB-IOT, 2G/3G/4G/5G, WIFI, bluetooth,
One or more of Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communications, sonar.
Preferably, clock is additionally provided on the intelligence control unit, the clock is configurable for that the gas is periodically arranged
The checking time of density monitor perhaps recording test time or record event time.
Preferably, the control of the intelligence control unit is by field control, and/or passes through Background control.
It is highly preferred that a kind of setting of the gas density relay with online self checking function according to the backstage
Or instruction, complete the on-line testing of the gas density relay；Alternatively,
According to the checking time of the gas density relay of setting, the online school of the gas density relay is completed
It tests.
Preferably, a kind of gas density relay with online self checking function, further includes multiple-pass joint, described
Gas density relay ontology, the normally open valve, normally close valve are arranged on the multiple-pass joint；Alternatively, the normally open valve, described
Gas density relay ontology is arranged on the multiple-pass joint；Alternatively, the gas density relay ontology, gas density are examined
Sensor, the normally open valve, normally close valve is surveyed to be arranged on the multiple-pass joint.
It is highly preferred that a kind of gas density relay with online self checking function further includes the first connecting tube,
The gas circuit of the normally close valve is connected to by first connecting tube with the gas density relay ontology；The multiple-pass joint
First interface is connected to position of first connecting tube between the gas density relay ontology, the normally close valve.
It is highly preferred that the normally open valve is connected to the second interface of the multiple-pass joint, and by the multiple-pass joint with
The gas density relay ontology is connected.
It is highly preferred that the interface that the normally open valve is connected with electrical equipment, be connected to the multiple-pass joint first is connect
Mouthful；The gas density relay ontology is connected by the normally open valve with the multiple-pass joint；The of the multiple-pass joint
Two interfaces are for connecting electrical equipment.
It is highly preferred that temperature sensor is connected to the gas circuit of the multiple-pass joint, or it is connected to the multiple-pass joint
Third interface.
Preferably, a kind of gas density relay with online self checking function, further includes: Self-sealing valve, it is described
Self-sealing valve is installed between the electrical equipment and the normally open valve；Alternatively, the normally open valve be installed on the electrical equipment with
Between the Self-sealing valve.
Preferably, a kind of gas density relay with online self checking function, further includes: tonifying Qi interface；Institute
Tonifying Qi interface is stated to be arranged on the electrical equipment；Alternatively, tonifying Qi interface setting the electrical equipment with it is described normally opened
Between valve；Alternatively, the tonifying Qi interface is arranged in the second connecting tube, second connecting tube be connected to the normally open valve with it is described
The gas circuit of pressure regulating mechanism, alternatively, second connecting tube is connected to the normally open valve and the gas density relay ontology.
Preferably, a kind of gas density relay with online self checking function, further includes: be used for human-computer interaction
Display interface, be connected with the intelligence control unit, the current verification data of real-time display, and/or support data input.
Preferably, a kind of gas density relay with online self checking function, further includes: micro- water sensor,
Micro- water sensor is connected with the gas density relay ontology and the intelligence control unit respectively.
It is highly preferred that a kind of gas density relay with online self checking function, further includes: gas circulator
Structure, the gas circulation mechanism are connected with the gas density relay ontology and the intelligence control unit respectively, the gas
Circulation mechanism includes capillary, sealed chamber and heating element.
Further, micro- water sensor can be installed on the sealed chamber of the gas circulation mechanism, in capillary,
Capillary exit, extracapillary.
Preferably, a kind of gas density relay with online self checking function, further includes decomposition product sensor,
The decomposition product sensor is connected with the gas density relay ontology and the intelligence control unit respectively.
Preferably, a kind of gas chamber of gas density relay with online self checking function is additionally provided with
Two pressure sensors, the second pressure sensor are connected with the intelligence control unit, are configured as the gas pressure of monitoring gas chamber
Force value.
Preferably, a kind of gas density relay with online self checking function, further includes taking the photograph for monitoring
As head.
A kind of method of calibration of gas density relay is provided in terms of the application third, comprising:
When normal operating conditions, gas density relay monitors the gas density value in electrical equipment；Normally open valve is to open
State, normally close valve are in off state, and the gas pressure of gas chamber is low pressure state；
Gas density relay or gas density detecting device according to the checking time or/and checking command of setting, and
Gas density value situation, under the situation for allowing check-up gas density electrical relay:
Normally open valve is closed by intelligence control unit；
Normally close valve is opened by intelligence control unit, declines gas pressure slowly, so that contact occurs for gas density relay
Signalizing activity, contact point signal movement are transmitted to intelligence control unit by on-line testing contact point signal sampling unit, intelligence control unit according to
Pressure value, temperature value when contact point signal acts obtain gas density value, or directly obtain gas density value, detect that gas is close
The contact point signal action value for spending relay, completes the verifying work of the contact point signal action value of gas density relay；
After the completion of all contact point signal verifying works, intelligence control unit opens normally open valve；Intelligence control unit controls gas chamber
Heating element causes the temperature of the indoor gas of the gas to increase, and then complete the gas chamber by heating the heating element
The density of interior gas declines, and to after setting value, intelligence control unit closes normally close valve, and the gas chamber and normally close valve is made to establish or store low
The gas of pressure.
Preferably, a kind of method of calibration of gas density relay, comprising:
When normal operating conditions, the gas in gas density relay or gas density detecting device monitoring electrical equipment is close
Angle value, while gas density relay or gas density detecting device are existed by gas density detection sensor and intelligence control unit
Line monitors the gas density value in electrical equipment；Normally open valve is open state, and normally close valve is in off state, the gas pressure of gas chamber
For low pressure state；
Gas density relay or gas density detecting device according to the checking time or/and checking command of setting, and
Gas density value situation, under the situation for allowing check-up gas density electrical relay:
On-line testing contact point signal sampling unit is adjusted to verification state by intelligence control unit, under verification state, In
Line verifies the contact point signal control loop of contact point signal sampling unit cutting gas density relay, by gas density relay sheet
The contact of body is connected to intelligence control unit；
Normally open valve is closed by intelligence control unit；
Normally close valve is opened by intelligence control unit, declines gas pressure slowly, so that contact occurs for gas density relay
Signalizing activity, contact point signal movement are transmitted to intelligence control unit by on-line testing contact point signal sampling unit, intelligence control unit according to
Pressure value, temperature value when contact point signal acts obtain gas density value, or directly obtain gas density value, detect that gas is close
The contact point signal action value for spending relay, completes the verifying work of the contact point signal action value of gas density relay；
Normally open valve is opened by intelligence control unit, slowly increase gas pressure, so that contact occurs for gas density relay
Signal resets, and contact point signal, which is resetted, is transmitted to intelligence control unit by on-line testing contact point signal sampling unit, intelligence control unit according to
Pressure value, temperature value when contact point signal resets obtain gas density value, or directly obtain gas density value, detect that gas is close
The contact point signal return value for spending relay, completes the verifying work of the contact point signal return value of gas density relay；
After the completion of all contact point signal verifying works, intelligence control unit controls the heating element of gas chamber, by heating institute
Heating element is stated, the temperature of the indoor gas of the gas is caused to increase, and then completes the density decline of the gas indoor gas, is arrived
After setting value, intelligence control unit closes normally close valve, and the gas chamber and normally close valve is made to establish or store the gas of low-pressure, intelligence control unit
On-line testing contact point signal sampling unit is also adjusted to working condition, the contact point signal control loop of gas density relay is extensive
Normal operation working condition is arrived again.
Preferably, the gas density detection sensor includes at least one pressure sensor and at least one temperature sensing
Device；Alternatively, using the gas density transmitter being made of pressure sensor and temperature sensor；Alternatively, using quartz tuning-fork skill
The density detection sensor of art.
Preferably, after the gas density relay completes verification, if any exception, alarm can be issued automatically, and upload
To distal end or it is sent on specified receiver.
Preferably, the method for calibration further include: scene shows gas density value and check results on the spot, or passes through backstage
Show gas density value and check results.
Preferably, the method for calibration further include: the control of the intelligence control unit is by field control, and/or after passing through
Platform control.
Preferably, the method for calibration further include: checking time can be rationally arranged according to region or/and environment temperature.
Compared with prior art, technical solution of the present invention has the advantages that
The application provides a kind of gas density relay and its method of calibration with online self checking function, for height
Pressure, middle voltage electrical equipment, including gas density relay ontology, gas density detection sensor, normally open valve, normally close valve, gas chamber,
On-line testing contact point signal sampling unit and intelligence control unit.Normally open valve is closed by intelligence control unit, so that gas density relay
Ontology separates in gas circuit with electrical equipment；Normally close valve is opened by intelligence control unit, declines gas pressure slowly, so that gas
Contact point signal movement occurs for density monitor, and contact point signal movement is transmitted to intelligence control by on-line testing contact point signal sampling unit
Unit, density value when intelligence control unit is acted according to contact point signal, detects the alarm of gas density relay ontology and/or closes
Interlocking point signalizing activity value and/or return value can complete the verification work of gas density relay without service personnel to scene
Make, improves the reliability of power grid, improve efficiency, reduce costs.It is close at the same time it can also carry out gas by intelligence control unit
The mutual self checking between relay ontology and gas density detection sensor is spent, realizing has the gas of online self checking function
Density monitor it is non-maintaining.The entire checking procedure of the application realizes the zero-emission of SF6 gas, meets regulations requirement.
Detailed description of the invention
Attached drawing is constituted part of this application to be used to provide further understanding of the present application, the schematic implementation of the application
Example and its explanation are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the gas density relay with online self checking function of embodiment one；
Fig. 2 is the structural schematic diagram of the gas density relay with online self checking function of embodiment two.
Marginal data:
1, gas density relay ontology；2, pressure sensor；21, first pressure sensor；22, second pressure senses
Device；3, temperature sensor；31, the first temperature sensor；32；Second temperature sensor；4, normally open valve；51, normally close valve；57, gas
Room；58, heating element；512, flow controller B；6, on-line testing contact point signal sampling unit；7, intelligence control unit；9, multi-pass connects
Head；10, tonifying Qi interface；12, flow controller A.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, referring to the drawings and give an actual example to this
Invention is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
Embodiment one:
Fig. 1 is one high pressure electrical equipment of the embodiment of the present application, the gas density relay with on-line testing function
The structural schematic diagram of device.
As shown in Figure 1, a kind of gas density relay with on-line testing function includes gas density relay ontology
1, the gas density relay ontology 1 includes: shell, and be disposed in the housing pedestal, end seat, pressure detector,
Temperature compensating element, several signal generators, machine core, pointer, dial.One end of the pressure detector is fixed on the base
On seat and in communication, the other end of the pressure detector is connected by the end seat with one end of the temperature compensating element
It connects, the other end of the temperature compensating element is equipped with crossbeam, and the crossbeam, which is equipped with, to be pushed the signal generator, makes the letter
Number contact of generator or the regulating part of disconnection.The machine core is fixed on the pedestal；The temperature compensating element
The other end also passes through connecting rod and connect with the machine core or directly connect with the machine core；The pointer be installed on the machine core and
Before the dial, the pointer shows gas density value in conjunction with the dial.The gas density relay sheet
Body 1 can also include the digital device or liquid crystal device that there is indicating value to show.
In addition, a kind of gas density relay with on-line testing function further include: pressure sensor 2, temperature
Sensor 3, normally open valve 4, normally close valve 51, gas chamber 57, heating element 58, flow controller B 512, on-line testing contact point signal are adopted
Sample unit 6, intelligence control unit 7.One end of the normally open valve 4 is sealedly attached on electrical equipment by electrical equipment jointing,
The other end of the normally open valve 4 is connected with the pedestal of gas density relay ontology 1；The pressure sensor 2 is in gas circuit
It is connected with the pressure detector of gas density relay ontology 1；The normally close valve 51 passes through flow controller B 512 and pressure
Detector is connected；On-line testing contact point signal sampling unit 6 is connected with signal generator and intelligence control unit 7 respectively；It is described
Normally open valve 4, normally close valve 51, heating element 58, flow controller B 512 are also connected with intelligence control unit 7 respectively.
Wherein, the signal generator includes microswitch or magnetic-type electrical contact, the gas density relay ontology 1
Pass through the signal generator output contact signal；The pressure detector includes Baden pipe or bellows；The temperature is mended
Element is repaid using temperature-compensating plate or the gas of shell inner sealing.The gas density relay of the application can also include: oil-filled
Type density monitor, without oil type density monitor, air density meter, gas density switch or gas gauge.
In above-described embodiment, the normally open valve 4, normally close valve 51 can multiplicity, can use cut-out cock, such as ball valve,
Butterfly valve, gate valve, shut-off valve, plug valve, butterfly valve, needle valve, diaphragm valve etc..Ball valve in this way, can be with by rotating self-styled spool
Ball valve closing switch equipment airway is driven, it specifically can flexible design according to actual needs.Normally open valve 4, normally close valve 51 are
Automatically, can also manually, semi-artificial verification.
The type of pressure sensor 2: absolute pressure transducer, relative pressure sensor or absolute pressure sensor be can be
Device and relative pressure sensor, quantity can be with several.Pressure sensor form can be diffusion silicon pressure sensor, MEMS pressure
(pressure measurement that such as Baden pipe is attached to induction coil passes for force snesor, chip type pressure sensor, coil-induced pressure sensor
Sensor), resistance pressure transmitter (pressure measurement sensor that such as Baden pipe is attached to slide wire resistance).It can be analog quantity pressure biography
Sensor is also possible to digital quantity pressure sensor.Pressure acquisition is the various pressure elements such as pressure sensor, pressure transmitter,
Such as diffusion silicon formula, sapphire formula, piezoelectric type, strain chip (resistance-strain chip, ceramics strain chip).
Temperature sensor 3 may is that thermocouple, thermistor, semiconductor-type；It can be with contact and contactless；It can be with
For thermal resistance and thermocouple.In short, temperature acquisition can use the various temperature-sensing elements such as temperature sensor, temperature transmitter.
The contact point signal that the on-line testing contact point signal sampling unit 6 mainly completes gas density relay ontology 1 is adopted
Sample.I.e. the basic demand of on-line testing contact point signal sampling unit 6 or function are: 1) not influencing the peace of electrical equipment in verification
Row for the national games.It is exactly that when the contact point signal of gas density relay ontology 1 acts, will not influence electrical equipment in verification
Safe operation；2) the contact point signal control loop of gas density relay ontology 1 does not influence the performance of gas density relay,
The performance for not influencing intelligence control unit 7 especially will not make gas density relay be damaged or influence test job.
The basic demand of the intelligence control unit 7 or function are: by intelligence control unit 7 complete to normally open valve 4, normally close valve 51,
The control and signal acquisition of heating element 58, flow controller B 512.It realizes: being able to detect that gas density relay ontology 1
Pressure value and temperature value of the contact point signal when acting, pressure value P when being converted into corresponding 20 DEG C20(density value), i.e.,
It is able to detect that the contact action value P of gas density relay ontology 1D20, complete the verification work of gas density relay ontology 1
Make.Alternatively, the density value P when contact point signal that can directly detect gas density relay ontology 1 actsD20, complete
The verifying work of gas density relay ontology 1.The rated pressure of the gas density relay ontology 1 can be passed through simultaneously
The test of value is completed gas density relay ontology 1, pressure sensor 2, the self checking work between temperature sensor 3, is realized
It is non-maintaining.
Certainly, intelligence control unit 7 can also be realized: complete test data storage；And/or test data export；And/or test
Data are printable；And/or data communication can be carried out with host computer；And/or analog quantity, digital information can be inputted.The intelligence control
Unit 7 further includes communication module, realizes the information such as remote transmitting test data and/or check results by communication module；When
When the rated pressure value output signal of the gas density relay ontology 1, intelligence control unit 7 acquires density at that time simultaneously
Value completes the rated pressure value verification of gas density relay ontology 1.
Electrical equipment, including SF6 outlet openings equipment, SF6 mixed gas electrical equipment, environment-friendly type outlet openings equipment,
Or other insulating gas electrical equipments.Specifically, electrical equipment includes GIS, GIL, PASS, breaker, current transformer, voltage
Mutual inductor, transformer, gas-filling cabinet, ring network cabinet etc..
Gas density relay ontology 1, pressure sensor 2, temperature sensor 3, normally open valve 4, normally close valve 51, gas chamber 57,
It can be according to need between heating element 58, flow controller B 512, on-line testing contact point signal sampling unit 6 and intelligence control unit 7
Carry out flexible setting.Such as gas density relay ontology 1, pressure sensor 2 and temperature sensor 3 can be set one
It rises；In short, the setting between them can flexible permutation and combination.It can according to need, gas density relay ontology, gas density
Detection sensor, normally open valve 4, normally close valve 51, gas chamber 57, heating element 58, flow controller B 512, on-line testing contact letter
Number sampling unit 6 and intelligence control unit 7 can carry out appropriate flexible setting between them.
The gas density relay with on-line testing function of the present embodiment verifies and monitoring principle is as follows:
When normal operating conditions, the gas in gas density relay or gas density detecting device monitoring electrical equipment is close
Angle value, while gas density relay or gas density detecting device pass through gas density detection sensor and intelligence control unit 7
Monitor the gas density value in electrical equipment on-line；Normally open valve 4 is open state, and normally close valve 51 is in off state, gas chamber 57
Gas pressure is low pressure state.Intelligence control unit 7 monitors the gas of electrical equipment according to pressure sensor 2, temperature sensor 3
Pressure and temperature obtains corresponding 20 DEG C of pressure value Ps20(i.e. gas density value).When needing to verify density monitor ontology 1,
At this time if gas density value P20The safety check density value P of >=settingS；Gas density relay issues instruction, passes through intelligence
It controls unit 7 and on-line testing contact point signal sampling unit 6 is adjusted to verification state, under verification state, on-line testing contact letter
Number sampling unit 6 cuts off the contact point signal control loop of gas density relay ontology 1, by gas density relay ontology 1
Contact is connected to intelligence control unit 7；Normally open valve 4 is closed by intelligence control unit 7；Normally close valve 51 is opened by intelligence control unit, makes gas
Pressure slowly declines, and gas flows to gas chamber 57, so that contact movement occurs for gas density relay ontology 1, contact movement passes through
On-line testing contact point signal sampling unit 6 is transmitted to intelligence control unit 7, pressure value, temperature when intelligence control unit 7 is acted according to contact
Value obtains gas density value, or directly obtains gas density value, detects the contact point signal action value of gas density relay, complete
At the verifying work of the contact point signal action value of gas density relay；Normally open valve 4 is opened by intelligence control unit 7, makes gas pressure
Power slowly rises, so that gas density relay occurs contact and resets, contact resets single by the sampling of on-line testing contact point signal
Member is transmitted to intelligence control unit 7, and the pressure value, temperature value when intelligence control unit 7 is resetted according to contact obtain gas density value, or directly
Gas density value is obtained, the contact point signal return value of gas density relay is detected, completes the contact of gas density relay
The verifying work of signal return value.After the completion of all contact point signal verifying works, intelligence control unit 7 controls the heating unit of gas chamber
Part 58 causes the temperature of the gas in the gas chamber 57 to increase, and then complete the gas chamber by heating the heating element 58
The density decline of gas in 57, to after setting value, intelligence control unit 7 closes normally close valve 51, keeps the gas chamber 57 and normally close valve 51 complete
At the gas for establishing or storing low-pressure.On-line testing contact point signal sampling unit 6 is simultaneously adjusted to work shape by intelligence control unit 7
The contact point signal control loop of state, gas density relay is restored to normal operation working condition.
Because gas density relay before starting verification, has carried out gas density value P20The safety check of >=setting is close
Angle value PSMonitoring and judgement, the gas of electrical equipment be in operational envelope, moreover gas leakage is slowly
Process, when verification are safe.When verification, the pressure of the gas of gas density relay ontology 1 gradually declines so that density after
Contact movement occurs for electric appliance ontology 1, and contact movement uploads to intelligence control unit 7 by on-line testing contact point signal sampling unit 6,
The pressure value and temperature value that intelligence control unit 7 measures when being acted according to contact, when becoming 20 DEG C corresponding by weight of gas characteristic
Pressure value P20(density value), so that it may detect the contact action value P of gas density relay ontology 1D20, to gas density after
After the alarm of electric appliance ontology 1 and/or the contact action value of block signal all detected, then by the control of intelligence control unit 7, make
The pressure of the gas of gas density relay ontology 1 gradually rises, test to gas density relay ontology 1 alarm with/close
Lock the return value of contact point signal.It verifies repeatedly (such as 2~3 times) repeatedly, then calculates its average value, this completes
The verifying work of gas density relay ontology 1.Then, intelligence control unit 7 disconnects the contact sampling of gas density relay ontology 1
Circuit, the contact of gas density relay ontology 1 is just not connected with intelligence control unit 7 at this time.Meanwhile it being opened by intelligence control unit 7
Normally open valve 4 is opened, so that gas density relay ontology 1 is connected in gas circuit with electrical equipment.Gas is connected to by intelligence control unit 7
The density monitoring loop of the control loop of volume density relay ontology 1, gas density relay ontology 1 works normally, and gas is close
The gas density for spending 1 security monitoring electrical equipment of relay ontology, makes gas equipment safety reliably work.Thus facilitate completion
The on-line testing of gas density relay ontology 1 works, while will not influence electricity when on-line testing gas density relay ontology 1
The safe operation of gas equipment.
After gas density relay ontology 1 completes verifying work, gas density relay is just determined, Ke Yigao
Show testing result.Mode is flexible, specifically can be with: 1) gas density relay can bulletin on the spot, such as by indicator light,
The display such as digital or liquid crystal；2) or gas density relay can be implemented to upload by online teletransmission communication modes, such as can be with
Upload to the backstage of on-line monitoring system；3) or by wirelessly uploading, specific terminal is uploaded to, such as can wirelessly upload hand
Machine；4) it or by other approach uploads；5) it or abnormal results by alarm signal line or dedicated signal lines uploads；6) on individually
It passes, or bundlees and upload with other signals.In short, gas density relay completes the on-line testing work of gas density relay
Afterwards, if any exception, alarm can be issued automatically, can upload to distal end, or can be sent on specified receiver, such as send out
It is sent to mobile phone.Alternatively, after the verifying work of gas density relay completion gas density relay, if any exception, intelligence control unit 7
Distal end (monitoring room, background monitoring platform etc.) can be uploaded by the alarm contact point signal of gas density relay ontology 1, and
Bulletin can also be shown on the spot.The gas density relay on-line testing of simple version, can have verification abnormal result to pass through
Alarm signal line uploads.It can be uploaded with certain rule, such as when exception, in an alarm contact contact in parallel, be had
Regularly open and close can obtain situation by parsing；Or it is uploaded by independent checking signal line.It specifically can be with state
Good upload or problematic upload can also be monitored on-line by teletransmission density and be uploaded, or check results by individually verifying
Signal wire uploads, or by showing on the spot, alarms, or by wirelessly uploading on the spot, network and upload with smart phone.Its communication party
Formula be it is wired or wireless, wired communication modes can for the industrial bus such as RS232, RS485, CAN-BUS, fiber optic Ethernet,
4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier etc.；Wireless communication mode can be 2G/3G/4G/5G
Deng, WIFI, bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communications, sonar, biography
5G/NB-IOT communication module (such as NB-IOT) built in sensor.In short, gas can be fully ensured that with multiple form, multiple combinations
The unfailing performance of density monitor.
Gas density relay has safety protection function, and when particularly as being less than setting value, gas density relay is just
Automatically on-line testing no longer is carried out to density monitor, and issues bulletin signal.For example, being set when the gas density value of equipment is less than
Definite value PSWhen, just do not verify.Such as: only as the gas density value of equipment >=(alarm pressure value+0.02MPa), ability
Carry out on-line testing.
Gas density relay can carry out on-line testing according to the time of setting, can also be according to the temperature (example of setting
Such as limit high temperature, high temperature, limit low temperature, low temperature, room temperature, 20 degree) carry out on-line testing.High temperature, low temperature, room temperature, 20 DEG C of rings
When border temperature online verifies, error determines to require to be different, such as when 20 DEG C of environment temperature verifications, can be according to gas
The required precision of density monitor is 1.0 grades or 1.6 grades, and when high temperature can be 2.5 grades.Specifically can according to the requirement of temperature,
Implement according to relevant criterion.Such as according to 4.8 temperature in DL/T 259 " sulfur hexafluoride gas density relay verification regulation "
Spend compensation performance regulation, required precision corresponding to each temperature value.
Gas density relay can be according to density monitor at different temperature, and the different periods carries out its error
The comparison of performance.That is different times, the comparison in same temperature ranges stated determine the performance of gas density relay, electrical equipment.
Comparison, history and present comparison with history each period.
Gas density relay can verify multiple (such as 2~3 times) repeatedly, according to each check results, calculate it
Average value.When necessary, on-line testing can be carried out to gas density relay at any time.
Meanwhile density monitor can also monitor the gas density value and/or pressure value of electrical equipment, and/or temperature on-line
Angle value, and upload to target device and realize on-line monitoring.
Embodiment two:
As shown in Fig. 2, a kind of gas density relay with online self checking function provided by Embodiment 2 of the present invention
Or gas density detecting device, comprising: (gas density relay ontology 1 also includes: mainly shell to gas density relay ontology 1
Body, and if be disposed in the housing pedestal, pressure detector, temperature compensating element, machine core, pointer, dial, end seat,
Dry signal generator and electrical equipment jointing), pressure sensor 2, temperature sensor 3, normally open valve 4, normally close valve 51, gas chamber
57, heating element 58, flow controller B 512, flow controller A 12, on-line testing contact point signal sampling unit 6, intelligence control list
Member 7, multiple-pass joint 9 and tonifying Qi interface 10.Embodiment adds tonifying Qi interfaces 10 and multiple-pass joint 9.Described 4 one end of normally open valve
It is connected with electrical equipment, the other end is connected to flow controller A12, and flow controller A12 is connected to the multiple-pass joint 9；Institute
Gas density relay ontology 1 is stated to be connected with the multiple-pass joint 9；Normally close valve 51 is connected to the multiple-pass joint 9.Normally close valve
51 are connected by flow controller A12 with gas chamber 57.The tonifying Qi interface 10, the pressure sensor 21 are also set, respectively on
On multiple-pass joint 9.Temperature sensor 31 is arranged on gas density relay ontology 1.Pressure sensor 22 and temperature sensor
32 are arranged on gas chamber 57.The installation site of multiple-pass joint 9 can according to need flexible setting.In addition, when described one kind has
When the gas density relay of online self checking function includes micro- water sensor, micro- water sensor also be can be set in multi-pass
On connector 9；When a kind of gas density relay with online self checking function includes decomposition product sensor, described point
Solution object sensor also can be set on multiple-pass joint 9；When a kind of gas density relay with online self checking function
When device includes tonifying Qi interface, the tonifying Qi interface also be can be set on multiple-pass joint 9, will not enumerate herein.
What is different from the first embodiment is that being that first pressure sensor 21, second is pressed respectively there are two the pressure sensors
Force snesor 22；There are two the temperature sensors, is the first temperature sensor 31, second temperature sensor 32 respectively.This
Temperature sensor 32 can also save in embodiment.The embodiment of the present invention two has the gas density relay of on-line testing function
With several pressure sensors and temperature sensor, can be compared between the pressure value that multiple pressure sensor monitorings obtain
To, mutually verification；It can be compared between the temperature value that multiple temperature sensors obtain, mutually verify；Multiple pressure sensings
It can be compared between corresponding multiple gas density values that device and multiple temperature sensors monitor, mutually verify.
It is integral that a kind of gas density relay with online self checking function is generally referred to as the design of its constituent element
Structure；And gas density detecting device is generally referred to as its constituent element and is designed to separate structure, flexibly forms.
In conclusion a kind of gas density relay and its verification side with online self checking function provided by the invention
Method is made of, major function gas circuit (can pass through pipeline) coupling part, pressure regulating part point, signal measurement control section etc.
It is that on-line testing is carried out to the contact point signal (pressure value when alarm/block action) of the gas density relay under environment temperature
Measurement, and corresponding pressure value when being converted into 20 DEG C automatically, canbe used on line (are alarmed and are closed to the contact of gas density relay
Lock) value performance detection.Its gas density relay, pressure sensor, temperature sensor, normally open valve, normally close valve, on-line testing
Contact point signal sampling unit, intelligence control unit installation site can be with flexible combination.Such as: gas density relay ontology, pressure
Sensor, temperature sensor, on-line testing contact point signal sampling unit, intelligence control unit can be combined, integrated design,
It seperated can also design；It may be mounted on shell or on multiple-pass joint, can also be linked together by connecting tube.It is normally opened
Valve can be connected directly with electrical equipment, can also be connected by Self-sealing valve or tracheae.Pressure sensor, temperature sensor,
On-line testing contact point signal sampling unit, intelligence control unit can be combined, integrated design；Pressure sensor, temperature pass
Sensor can be combined, integrated design；On-line testing contact point signal sampling unit, intelligence control unit can be combined one
It rises, integrated design.In short, structure is not restricted to one pattern.
Gas density relay with online self checking function, in high temperature, low temperature, room temperature, 20 DEG C of environment temperature verifications
When density monitor contact, it is different that requirement, which can be, to be determined to its error, it specifically can be according to the requirement of temperature, according to phase
Pass standard is implemented；Can be according to density monitor at different temperature, the different periods carries out the comparison of its error performance.
That is different times, the comparison in same temperature ranges stated, the performance for density monitor of decisioing making.Ratio with history each period
To, history and present comparison.It can also check UP to density monitor ontology.It when necessary, can be at any time to density relay
Device contact point signal is verified；With gas density relay ontology, the electrical equipment monitored density value it is whether normal
Determined.It can density value, gas density relay ontology, pressure sensor, temperature sensing to electrical equipment itself
Device carries out normal and abnormal judgement and analysis, compares, and then realizes to the monitoring of electrical equipment gas density, density monitor sheet
The states such as body are determined, are compared, are analyzed；Also the contact point signal state of gas density relay is monitored, and its shape
State implements teletransmission.It can be in the contact point signal state for being known that gas density relay from the background: it is disconnection or closure, thus
More one layer of monitoring, improve reliability；Detection, or detection can also be can be carried out to the temperature compensating of gas density relay ontology
And judgement；Can also the contact contact resistance to gas density relay ontology detect, or detection and determine；Also to gas
The insulation performance of density monitor ontology is detected, or detection and judgement.In addition, for SF6 gas, SF6 gas pressure
The specific conversion method of power-temperature characterisitic can be calculated according to Beattie-Bridgeman equation；For SF6 mixed gas,
SF6 mixture pressure-specific conversion method of temperature characterisitic can according to Dalton's law (of partial pressures), Beattie-Bridgeman equation,
The Ideal-Gas Equation is calculated.
The application structure characteristics of compact layout, rationally, each component has good antirust, shake-proof ability, firmly installs, using can
It leans on.Connection, the dismounting of each pipeline of gas density relay are easily operated, and equipment and component facilitate maintenance.The application need not maintenance
Personnel can complete the verifying work of gas density relay to scene, substantially increase the reliability of power grid, improve efficiency,
It reduces costs.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (39)
1. a kind of gas density relay with online self checking function characterized by comprising gas density relay sheet
Body, gas density detection sensor, normally open valve, normally close valve, gas chamber, on-line testing contact point signal sampling unit and intelligence control unit；
One end of the normally close valve is connected with the gas circuit of the gas density relay ontology, the other end of the normally close valve with
The gas chamber is connected；The gas chamber and normally close valve are configured as establishing or storing the gas of low-pressure, and it is close to adjust the gas
The pressure decline for spending relay ontology, makes the gas density relay ontology that contact point signal movement occur；
One end of the normally open valve is equipped with the interface being connected with electrical equipment, and the other end of the normally open valve and the gas are close
The gas circuit of degree relay ontology is connected or the other end of the normally open valve connects the gas circuit of the normally close valve, thus by institute
Normally open valve is stated to be connected with the gas circuit of the gas density relay ontology；The normally open valve is configured as turning off or on electrical
The gas circuit of equipment, the gas circuit for completing electrical equipment is closed, and adjusts the pressure rise of the gas density relay ontology, is made
The gas density relay ontology occurs contact point signal and resets；
The gas density detection sensor is connected to the gas density relay ontology；
The on-line testing contact point signal sampling unit is connected with the gas density relay ontology, is configured as sampling
The contact point signal of the gas density relay ontology；
The intelligence control unit, respectively with the normally open valve, normally close valve, gas density detection sensor and the on-line testing contact
Signal sampling unit is connected, and is configured as controlling turning off or on for the normally open valve, control the normally close valve closing or
It opens, pressure value acquisition and temperature value acquisition, and/or gas density value acquire, and the detection gas density relay sheet
The contact point signal action value and/or contact point signal return value of body；
Wherein, the contact point signal includes alarm, and/or locking.
2. a kind of gas density detecting device with online self checking function characterized by comprising gas density relay
Ontology, gas density detection sensor, normally open valve, normally close valve, gas chamber, on-line testing contact point signal sampling unit and intelligence control list
Member；
One end of the normally close valve is connected with the gas circuit of the gas density relay ontology, the other end of the normally close valve with
The gas chamber is connected；The gas chamber and normally close valve are configured as establishing or storing the gas of low-pressure, and it is close to adjust the gas
The pressure decline for spending relay ontology, makes the gas density relay ontology that contact point signal movement occur；
One end of the normally open valve is equipped with the interface being connected with electrical equipment, and the other end of the normally open valve and the gas are close
The gas circuit of degree relay ontology is connected or the other end of the normally open valve connects the gas circuit of the normally close valve, thus by institute
Normally open valve is stated to be connected with the gas circuit of the gas density relay ontology；The normally open valve is configured as turning off or on electrical
The gas circuit of equipment, the gas circuit for completing electrical equipment is closed, and adjusts the pressure rise of the gas density relay ontology, is made
The gas density relay ontology occurs contact point signal and resets；
The gas density detection sensor is connected to the gas density relay ontology；
The on-line testing contact point signal sampling unit is connected with the gas density relay ontology, is configured as sampling
The contact point signal of the gas density relay ontology；
The intelligence control unit, respectively with the normally open valve, normally close valve, gas density detection sensor and the on-line testing contact
Signal sampling unit is connected, and is configured as controlling turning off or on for the normally open valve, control the normally close valve closing or
It opens, pressure value acquisition and temperature value acquisition, and/or gas density value acquire, and the detection gas density relay sheet
The contact point signal action value and/or contact point signal return value of body；
Wherein, the contact point signal includes alarm, and/or locking.
3. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, feature
It is, the gas density relay ontology includes: shell, and the pedestal, the pressure detector, temperature that are disposed in the housing
Compensating element, several signal generators；Wherein, the signal generator includes microswitch or magnetic-type electrical contact, the gas
Volume density relay ontology passes through the signal generator output contact signal；The pressure detector includes Baden pipe or ripple
Pipe；The temperature compensating element is using temperature-compensating plate or the gas of shell inner sealing.
4. gas density relay according to claim 3 or gas density detecting device, it is characterised in that: described normally closed
The gas circuit of valve is connected with the pressure detector；The other end of the normally open valve and the pedestal, the pressure detector phase
The other end of connection or the normally open valve connects the gas circuit of the normally close valve, thus by the normally open valve and the pedestal, institute
Pressure detector is stated to be connected；The on-line testing contact point signal sampling unit is connected with the signal generator.
5. gas density relay according to claim 3 or gas density detecting device, it is characterised in that: the gas
Density monitor ontology further includes indication mechanism, and the indication mechanism includes machine core, pointer, dial, and the machine core is fixed on
On the pedestal or in shell；The other end of the temperature compensating element also passes through connecting rod and connect with the machine core or directly and institute
State machine core connection；The pointer is installed on the machine core and is set to before the dial, and the pointer is in conjunction with the scale
Disk shows gas density value；And/or
The indication mechanism includes the digital device or liquid crystal device that there is indicating value to show.
6. gas density relay according to claim 3 or gas density detecting device, it is characterised in that: the gas
Density monitor ontology or intelligence control unit further include contact resistance detection unit, the contact resistance detection unit and contact point signal
It is connected or is directly connected with signal generator；Under the control of on-line testing contact point signal sampling unit, gas density after
The contact point signal of electric appliance ontology is isolated with its control loop, when the contact point signal of gas density relay ontology acts,
And/or when being connected to the instruction of detection contact contact resistance, contact resistance detection unit is able to detect that gas density relay
The contact contact resistance value of ontology.
7. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, feature
Be: the gas density detection sensor is arranged on the gas density relay ontology；Alternatively,
The normally close valve, gas chamber are arranged on the gas density relay ontology；Alternatively,
The gas density detection sensor, the on-line testing contact point signal sampling unit and the intelligence control unit are arranged in institute
It states on gas density relay ontology；Alternatively,
The normally close valve, gas chamber, the gas density detection sensor, the on-line testing contact point signal sampling unit and described
Intelligence control unit is arranged on the gas density relay ontology.
8. gas density relay according to claim 7 or gas density detecting device, it is characterised in that: the gas
Density monitor ontology, the gas density detection sensor are integrated；Alternatively, the gas density relay sheet
The telemetering type gas density relay that body, the gas density detection sensor are integrated.
9. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, feature
Be: the gas density detection sensor is integrated；Alternatively, the gas density detection sensor is integration knot
The gas density transmitter of structure.Preferably, the on-line testing contact point signal sampling unit, the intelligence control unit are arranged described
In gas density transmitter.
10. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the gas density detection sensor includes at least one pressure sensor and at least one temperature sensor；Alternatively,
Using the gas density transmitter being made of pressure sensor and temperature sensor；Alternatively,
Using the density detection sensor of quartz tuning-fork technology.
11. gas density relay according to claim 10 or gas density detecting device, it is characterised in that: the pressure
Force snesor is installed in the gas circuit of the gas density relay ontology.
12. gas density relay according to claim 10 or gas density detecting device, it is characterised in that: the temperature
Degree sensor is installed in the gas circuit of the gas density relay ontology or outside gas circuit or the gas density relay ontology
The interior or described gas density relay sheet is external.
13. gas density relay according to claim 10 or gas density detecting device, it is characterised in that: the pressure
Force snesor includes but is not limited to relative pressure sensor and/or absolute pressure transducer.
14. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the on-line testing contact point signal sampling unit and the intelligence control unit are set together.Preferably, the online school
It tests contact point signal sampling unit and the intelligence control unit is sealed in a cavity or shell.
15. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the normally close valve and/or normally open valve are sealed in a cavity or shell.
16. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the outside or inside of the gas chamber is equipped with heating element, and the heating element is connected with intelligence control unit, passes through heating
The heating element causes the temperature of the indoor gas of the gas to increase, and then completes the density decline of the gas indoor gas,
The gas chamber and normally close valve is set to establish or store the gas of low-pressure.Preferably, the gas chamber further includes heat preservation member, the heat preservation
Part is set to the outside of the gas chamber.
17. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the normally open valve or normally close valve are motor-driven valve, and/or solenoid valve, or are piezo electric valve, or are temperature controlled valve, or
For new type of valve being made of intelligent memory material, being opened or closed using electric heating.
18. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: further including flow controller, the flow controller is configured as the uninterrupted of control gas；The flow control
Device is arranged in normally open valve side or normally close valve side；Alternatively, a flow control is respectively arranged in the normally open valve side and normally close valve side
Device.
19. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the normally close valve and the air chamber sealing are in a cavity or shell.
20. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the on-line testing contact point signal sampling unit samples the contact point signal of the gas density relay ontology full
Foot:
The on-line testing contact point signal sampling unit has independent at least one set of sampling contact, can connect simultaneously at least one
Point is automatically performed verification, and continuously measures, need not replace contact or reselect contact；Wherein,
The contact including but not limited to alarm contact, alarm contact+locking contact, alarm contact+1 contact of locking+locking 2
One of contact, alarm contact+locking contact+superpressure contact.
21. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the intelligence control unit obtains the gas density value of the gas density detection sensor acquisition；Alternatively, the intelligence control list
Member obtains the pressure value and temperature value of gas density detection sensor acquisition, completes the gas density relay to being supervised
The on-line monitoring of the gas density of the electrical equipment of survey.
22. gas density relay according to claim 21 or gas density detecting device, which is characterized in that the intelligence
It controls unit and the gas density value, the averaging method is calculated using averaging method are as follows: in the time interval of setting, setting acquisition frequency
N number of gas density value of the different time points all collected is carried out mean value calculation processing, obtains its gas density by rate
Value；Alternatively,
Time interval, set temperature interval steps in setting, the N number of different temperatures collected in whole temperature ranges
The corresponding density value of value carries out mean value calculation processing, obtains its gas density value；Alternatively,
Time interval, setting pressure intervals step-length in setting, the N number of difference collected in whole pressure ranges
Density value corresponding to pressure value carries out mean value calculation processing, obtains its gas density value；
Wherein, N is the positive integer more than or equal to 1.
23. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the intelligence control unit obtains gas density relay ontology when occurring contact point signal movement or switching, the gas
The gas density value of volume density detection sensor acquisition, completes the on-line testing of the gas density relay；Alternatively,
It is close that the intelligence control unit obtains gas density relay ontology when occurring contact point signal movement or switching, the gas
The pressure value and temperature value of detection sensor acquisition are spent, and becomes corresponding 20 DEG C of pressure according to gas pressure-temperature Characteristic conversion
Force value, i.e. gas density value, complete the on-line testing of the gas density relay.
24. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the gas density relay ontology is with comparison density value output signal, the comparison density value output signal and institute
Intelligence control unit is stated to be connected；Alternatively,
The gas density relay ontology is with comparison pressure value output signal, the comparison pressure value output signal and the intelligence
Control unit is connected.
25. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the intelligence control unit is equipped with electric interfaces, and the electric interfaces complete test data storage and/or test data is led
Out and/or test data prints, and/or carries out data communication, and/or input analog quantity, digital information with host computer.
26. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is that the intelligence control unit further includes the communication module for realizing remote transmitting test data, and/or check results, described
The communication modes of communication module are wire communication or wireless communication mode.
27. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: clock is additionally provided on the intelligence control unit, the clock is configurable for that the gas density relay is periodically arranged
The checking time of device perhaps recording test time or record event time.
28. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is: the control of the intelligence control unit is by field control, and/or passes through Background control.
29. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is, further includes: multiple-pass joint, the gas density relay ontology, the normally open valve, normally close valve are arranged in the multi-pass
On connector；Alternatively,
The normally open valve, the gas density relay ontology are arranged on the multiple-pass joint；Alternatively,
The gas density relay ontology, gas density detection sensor, the normally open valve, normally close valve are arranged in the multi-pass
On connector.
30. gas density relay according to claim 29 or gas density detecting device, it is characterised in that: further include
The gas circuit of first connecting tube, the normally close valve is connected to by first connecting tube with the gas density relay ontology；Institute
State multiple-pass joint first interface be connected to first connecting tube the gas density relay ontology, the normally close valve it
Between position.
31. gas density relay according to claim 29 or gas density detecting device, it is characterised in that: described normal
Valve opening is connected to the second interface of the multiple-pass joint, and passes through the multiple-pass joint and the gas density relay ontology phase
Connection.
32. gas density relay according to claim 29 or gas density detecting device, it is characterised in that: described normal
The interface that valve opening is connected with electrical equipment is connected to the first interface of the multiple-pass joint；The gas density relay sheet
Body is connected by the normally open valve with the multiple-pass joint；The second interface of the multiple-pass joint is for connecting electrical equipment.
33. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is, further includes: Self-sealing valve, the Self-sealing valve are installed between the electrical equipment and the normally open valve；Alternatively, described normal
Valve opening is installed between the electrical equipment and the Self-sealing valve.
34. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is, further includes: tonifying Qi interface；
The tonifying Qi interface is arranged on the electrical equipment；Alternatively,
The tonifying Qi interface is arranged between the electrical equipment and the normally open valve；Alternatively,
The tonifying Qi interface is arranged in the second connecting tube, and second connecting tube is connected to the normally open valve and the pressure is adjusted
The gas circuit of mechanism, alternatively, second connecting tube is connected to the normally open valve and the gas density relay ontology.
35. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is, further includes: for the display interface of human-computer interaction, it is connected with the intelligence control unit, the current verification of real-time display
Data, and/or support data input.
36. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is, further includes: the micro- water sensor being connected respectively with the gas density relay ontology and the intelligence control unit,
And/or the decomposition product sensor being connected respectively with the gas density relay ontology and the intelligence control unit.
37. gas density relay or gas density detecting device as claimed in claim 2 according to claim 1, special
Sign is that the gas chamber is additionally provided with second pressure sensor, and the second pressure sensor is connected with the intelligence control unit,
It is configured as the gas pressure value of monitoring gas chamber.
38. a kind of method of calibration of gas density relay characterized by comprising
When normal operating conditions, gas density relay monitors the gas density value in electrical equipment；Normally open valve is open state,
Normally close valve is in off state, and the gas pressure of gas chamber is low pressure state；
Gas density relay or gas density detecting device are according to the checking time or/and checking command and gas of setting
Density value situation, under the situation for allowing check-up gas density electrical relay:
Normally open valve is closed by intelligence control unit；
Normally close valve is opened by intelligence control unit, declines gas pressure slowly, so that contact point signal occurs for gas density relay
Movement, contact point signal movement are transmitted to intelligence control unit by on-line testing contact point signal sampling unit, and intelligence control unit is according to contact
Pressure value, temperature value when signalizing activity obtain gas density value, or directly obtain gas density value, detect gas density after
The contact point signal action value of electric appliance completes the verifying work of the contact point signal action value of gas density relay；
After the completion of all contact point signal verifying works, intelligence control unit opens normally open valve；The heating of intelligence control unit control gas chamber
Element causes the temperature of the indoor gas of the gas to increase, and then complete the gas Indoor Air by heating the heating element
The density of body declines, and to after setting value, intelligence control unit closes normally close valve, and the gas chamber and normally close valve is made to establish or store low-pressure
Gas.
39. a kind of method of calibration of gas density relay according to claim 38 characterized by comprising
Gas density when normal operating conditions, in gas density relay or gas density detecting device monitoring electrical equipment
Value, while gas density relay or gas density detecting device are online by gas density detection sensor and intelligence control unit
Monitor the gas density value in electrical equipment；Normally open valve is open state, and normally close valve is in off state, and the gas pressure of gas chamber is
Low pressure state；
Gas density relay or gas density detecting device are according to the checking time or/and checking command and gas of setting
Density value situation, under the situation for allowing check-up gas density electrical relay:
On-line testing contact point signal sampling unit is adjusted to verification state by intelligence control unit, under verification state, online school
The contact point signal control loop for testing contact point signal sampling unit cutting gas density relay, by gas density relay ontology
Contact is connected to intelligence control unit；
Normally open valve is closed by intelligence control unit；
Normally close valve is opened by intelligence control unit, declines gas pressure slowly, so that contact point signal occurs for gas density relay
Movement, contact point signal movement are transmitted to intelligence control unit by on-line testing contact point signal sampling unit, and intelligence control unit is according to contact
Pressure value, temperature value when signalizing activity obtain gas density value, or directly obtain gas density value, detect gas density after
The contact point signal action value of electric appliance completes the verifying work of the contact point signal action value of gas density relay；
Normally open valve is opened by intelligence control unit, slowly increase gas pressure, so that contact point signal occurs for gas density relay
It resets, contact point signal, which is resetted, is transmitted to intelligence control unit by on-line testing contact point signal sampling unit, and intelligence control unit is according to contact
Signal reset when pressure value, temperature value obtain gas density value, or directly obtain gas density value, detect gas density after
The contact point signal return value of electric appliance completes the verifying work of the contact point signal return value of gas density relay；
After the completion of all contact point signal verifying works, intelligence control unit controls the heating element of gas chamber, by heating described add
Thermal element causes the temperature of the indoor gas of the gas to increase, and then completes the density decline of the gas indoor gas, to setting
After value, intelligence control unit closes normally close valve, and the gas chamber and normally close valve is made to establish or store the gas of low-pressure, and intelligence control unit will also
On-line testing contact point signal sampling unit is adjusted to working condition, and the contact point signal control loop of gas density relay is restored to
Normal operation working condition.
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| CN111446115A (en) * | 2020-04-29 | 2020-07-24 | 上海乐研电气有限公司 | Gas density relay capable of intelligently monitoring whole life cycle and implementation method thereof |
| CN111446113A (en) * | 2020-04-29 | 2020-07-24 | 上海乐研电气有限公司 | Gas density relay with online self-checking function and checking method thereof |
| CN112269125A (en) * | 2020-10-21 | 2021-01-26 | 中广核核电运营有限公司 | Pressure switch on-line checking method |
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