CN110618060A - Electromechanical integral digital display gas density relay - Google Patents

Electromechanical integral digital display gas density relay Download PDF

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Publication number
CN110618060A
CN110618060A CN201910830725.6A CN201910830725A CN110618060A CN 110618060 A CN110618060 A CN 110618060A CN 201910830725 A CN201910830725 A CN 201910830725A CN 110618060 A CN110618060 A CN 110618060A
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Prior art keywords
value
gas density
gas
digital display
density relay
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王乐乐
贺兵
廖海明
金海生
金海勇
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Shanghai Leyan Electric Co Ltd
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Shanghai Leyan Electric Co Ltd
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Priority to CN201910830725.6A priority Critical patent/CN110618060A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
    • G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
    • 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
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fluid Mechanics (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to an electric power device. An electromechanically integrated gas density relay comprising a mechanical portion and an electronic portion relatively independent of the mechanical portion; the mechanical part comprises a pressure detector, a temperature compensation element and a plurality of signal generators; the gas density is monitored through the pressure detector and the temperature compensation element, and the monitoring of the gas density is realized by combining a plurality of signal generators, wherein the electronic part comprises a pressure sensor, a temperature sensor, an intelligent part and a digital display element; the intelligent component is respectively connected with the pressure sensor, the temperature sensor and the digital display element. By means of pressure sensorsThe temperature sensor collects pressure and temperature signals, and corresponding density value P is obtained through processing of the intelligent component20Then the corresponding density value P is displayed through a digital display element20. The numerical code displays the reading, can know the density value of gas accurately, can find in time more when the gas insulation electrical equipment takes place to leak gas. The invention reduces SF6The leakage of gas is beneficial to environmental protection.

Description

Electromechanical integral digital display gas density relay
Technical Field
The invention relates to the technical field of electric power, in particular to a gas density relay applied to high-voltage or medium-voltage electrical equipment, and particularly relates to a gas density relay with convenient and accurate digital display.
Background
Currently, a gas density relay with a microswitch as a contact is generally used to monitor the density of an insulating gas in a gas-insulated apparatus. Fig. 1 is a schematic structural diagram of a conventional sulfur hexafluoride gas density relay, and as shown in fig. 1, microswitches adopted in the sulfur hexafluoride gas density relay are provided with operating arms 1011, 1021, 1031, and the operating arms 1011, 1021, 1031 may contact with corresponding signal adjusting mechanisms. Although the gas density relay with the structure has the advantage of good electrical performance, the contact operating arm 102 is long and belongs to a cantilever beam, and the minimal vibration in the working environment can cause the contact operating arm 102 to vibrate greatly, so that the sulfur hexafluoride gas density relay generates misoperation, even destroys a microswitch, and the sulfur hexafluoride gas density relay cannot work normally.
Moreover, because the installation positions of the density relays of many electrical devices are very high, if the pointer + dial reading is adopted, the operation and maintenance personnel stand at different angles, the observation visual angles are different, the readings are also different, and in order to obtain accurate reading, the operation and maintenance personnel need to climb on the tall and big electrical devices to read the pointer reading on the small dial, which is very troublesome and has potential safety hazards. On the other hand, when the electrical equipment has small leakage, the amount of insulating gas in the body of the electrical equipment slowly decreases, and as mentioned above, the dial pointer type reading is easy to deviate, but if the reading is not accurate, the leakage problem of the electrical equipment cannot be accurately and timely found and timely processed.Failure to discover and process in time will allow for excess SF6The gas leaks into the atmosphere, causing pollution and destruction of the atmospheric environment. Therefore, how to provide a digital display type gas density relay with good vibration resistance and convenient and accurate reading becomes a technical problem which needs to be solved urgently by technical personnel in the field, is beneficial to the safety of a power grid and is beneficial to protecting the environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electromechanical integrated digital display gas density relay. The invention can accurately monitor the gas density and simultaneously facilitate accurate reading.
In order to achieve the purpose, the invention provides the following scheme: an electromechanical integrated digital display gas density relay comprises a mechanical part and an electronic part which is relatively independent from the mechanical part; the mechanical part comprises a pressure detector, a temperature compensation element and a plurality of signal generators; the pressure detector and the temperature compensation element monitor the gas density and are combined with a plurality of signal generators to realize the monitoring of the gas density when the gas density is lower than or/and higher than the set gas density P20 setWhen the alarm is used, a plurality of signal generators output alarm or/and locking contact signals; the electronic part comprises a pressure sensor, a temperature sensor, an intelligent component and a digital display element; the intelligent component is respectively connected with the pressure sensor, the temperature sensor and the digital display element; pressure and temperature signals are acquired through a pressure sensor and a temperature sensor, and corresponding density values P are obtained through processing of an intelligent component according to gas pressure-temperature characteristics20And then displaying the corresponding density value P through a digital display element20。
The electromechanical integrated digital display gas density relay also comprises a communication unit, and the intelligent component obtains the density value P through the communication unit20Uploading the gas density value to target equipment or a target platform, and further realizing the on-line monitoring of the gas density value P of the electrical equipment20(ii) a Alternatively, the first and second electrodes may be,
the intelligent component obtains the corresponding density value P through the communication unit20Pressure value P, temperature value T, or pressure value P, temperatureThe value T is uploaded to a target device or a target platform, and the gas density value P of the electrical equipment is comprehensively monitored on line20。
The electromechanical integrated digital display gas density relay has the density value P20The gas density value is monitored in real time or obtained by an average value method20 averageOr the trend value Δ P20。
The electromechanical integrated digital display gas density relay also comprises an electronic signal contact, and when the gas density value P of the electrical equipment monitored by the electronic part20Lower or higher than the set density value P20 setWhen the system is used, the electronic part outputs an electronic signal contact, so that the operation and inspection personnel can know the abnormal information; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20The trend change value DeltaP of20Lower or higher than the set trend change value DeltaP20 setThen the relay outputs the notification signal contact; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20Average value P of20 averageLower or higher than the set density average value P20 average settingThe relay outputs the notification signal contact.
The electromechanical integration digital display gas density relay is characterized in that the average value method comprises the following steps: setting collection frequency in a set time interval, and carrying out average calculation processing on N densities of different time points obtained by all the collections to obtain a gas density value P20Average value P of20 average。
Setting temperature interval step length in set time interval, calculating average value of density values (N) of different temperature values collected in all temperature ranges to obtain gas density value P20Average value P of20 average(ii) a Alternatively, the first and second electrodes may be,
the density of different pressure values acquired in the whole pressure variation range is acquired by setting the pressure interval step length in a set time intervalThe values (N) are subjected to average value calculation processing to obtain the gas density value P20Average value P of20 average。
The trend change value delta P of the electromechanical integrated digital display gas density relay20Comprises the following steps: setting collection frequency in set time interval, calculating average value of density values (N) of different time points obtained by all the collections to obtain gas density value P20Average value P of20 averageThen, a trend calculation period T is setPeriod of timeObtaining a trend change value delta P20＝P20 average (previous T period value)-P20 average (T period)I.e. the mean value P20 averageFront-back period TPeriod of timeA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerWhen the gas density value P of the monitored electrical equipment is20The trend change value DeltaP of20＝P20 (previous T interval)-P20(T interval)I.e. density value P20Front-to-back time interval TSpacerA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerA set time length TLength of. Using a set time interval TSpacerSetting the collection frequency, and collecting all the density values P of different time points20Performing accumulative calculation to obtain an accumulative value sigmaP20Obtaining a trend change value delta P20＝∑P20 (previous T length)-∑P20 (when T length)I.e. the time length T before and afterLength ofCumulative value ΣP20The difference between them.
The electromechanical integration digital display gas density relay is characterized in that the set density value P20 setThe density value is set according to the requirement, or the density value detected within a certain period of time before according to the requirement.
The electromechanical integrated digital display gas density relay is characterized in that the intelligent component has a gas density value P at certain intervals20Fourier transform is performed to convert to a corresponding frequency spectrum, periodic components are filtered out, or,
the components are decomposed into trend, periodic and random components according to the time series, and the gas leakage is judged according to the trend components.
The electromechanical integration digital display gas density relay obtains the density value P of the electrical equipment20Lower or higher than the set density value P20 setThe relay outputs the notification signal contact.
The set value of the electromechanical integrated digital display gas density relay can be modified and stored on line.
The electromechanical integrated digital display gas density relay is provided with an input gas supplementing or/and gas releasing test event, and carries out a gas density value P according to the corresponding gas supplementing or/and gas releasing test event20New calculations or adjustments.
The electromechanical integrated digital display gas density relay monitors the gas density value P in a certain short time20Gradually and obviously increasing, judging as a gas supplementing event, and according to the maximum gas density value P monitored at the time20Judging that the gas supplementing event is ended, and carrying out gas density value P20New calculations or adjustments.
The electromechanical integrated digital display gas density relay monitors the gas density value P in a certain short time20Gradually slightly decreasing, judging as a deflation test event, and according to the minimum gas density value P monitored at that time20If so, judging that the air discharge test event is ended, and carrying out gas density value P20New calculations or adjustments.
The electromechanical integrated digital display gas density relay simultaneously records gas supply or/and gas discharge test events, such as time or/and times or/and gas quality.
The electromechanical integrated digital display gas density relay has the set density value P20 setThe density value may be set as required or detected within a certain period of time as required.
The electromechanical integrated digital display gas density relay comprises an electronic signal contact, but is not limited to one or more of an electromagnetic relay, a solid-state relay, a time relay, a power relay, a silicon controlled rectifier, an electronic switch, an electric contact, an optical coupler, DI, an MOS field effect transistor, a triode, a diode and an MOS FET relay.
In the electromechanical integrated digital display gas density relay, the electronic signal contact is connected with the signal generator in parallel or in series, and an abnormal signal is uploaded through an alarm or locking signal line of the density relay, so that the operation and inspection personnel can know the abnormal information; alternatively, the first and second electrodes may be,
and abnormal signals are uploaded through other signal lines, so that the operation and inspection personnel can know the abnormal information.
The electromechanical integrated digital display gas density relay is characterized in that the intelligent component acquires a pressure value and a temperature value through a pressure sensor and a temperature sensor, and then converts the pressure value and the temperature value into a corresponding pressure value P of 20 ℃ according to gas characteristics and the acquired gas pressure value and temperature value20I.e. density value P20. When density value P20Is less than or equal to the set value P20 setAnd in time, the intelligent component can upload abnormal signals through an alarm contact signal wire of the density relay, so that the operation and inspection personnel can know abnormal information.
Or when the density value P is20Is less than or equal to the set value P20 setAnd in time, the intelligent component uploads an abnormal signal through the communication module, so that the operation and inspection personnel can know abnormal information.
The electromechanical integrated digital display gas density relay is characterized in that the set values are as follows: the density value is set according to the requirement or detected within a certain period of time according to the requirement.
The electromechanical integrated digital display gas density relay is characterized in that the intelligent component collects pressure values and temperature values through a pressure sensor and a temperature sensor, and then converts the pressure values and the temperature values into corresponding pressure values of 20 ℃ according to gas characteristics, namely a density value P according to the collected gas pressure values and temperature values20. When density value P20Is smaller, when the smaller trend value is greater than or equal to the set value△P20 setWhen the intelligent component is used, the intelligent component can upload an abnormal signal through an alarm contact signal wire of the density relay, so that the operation and inspection personnel can know the abnormal information of air leakage;
or when the density value P is20Is smaller, when the trend value is greater than or equal to the set value DeltaP20 setAnd in time, the intelligent component uploads an abnormal signal through the communication module, so that the operation and inspection personnel can know abnormal information.
The electromechanical integrated digital display gas density relay also comprises a density measuring sensor.
The electromechanical integrated digital display gas density relay also comprises an electronic signal contact, and when the gas pressure value of the electrical equipment monitored by the electronic part is lower than or higher than the set pressure value, or when the gas temperature value of the electrical equipment monitored by the electronic part is lower than or higher than the set temperature value, the electronic part outputs the electronic signal contact.
The electronic signal contact of the electromechanical integrated digital display gas density relay is connected with the corresponding signal generator in parallel or in series.
The electromechanical integrated digital display gas density relay outputs a mechanical contact signal through a signal generator.
The electromechanical integrated digital display gas density relay also comprises a micro-water sensor which monitors the gas micro-water value on line, and when the micro-water value exceeds a set value, the electronic part outputs an electronic signal contact.
The electromechanical integrated digital display gas density relay also comprises a decomposed product sensor which monitors gas decomposed products on line, and when the content of the decomposed products exceeds a set value, an electronic part outputs an electronic signal contact.
The gas density relay connects the monitored data and information to a signal generator or a special line or other lines in parallel or in series through an output electronic signal contact, and uploads the data and the information through regular coding; the data and information relate to one or more of monitored density values, pressure values, temperature values, mechanical contact signal state information, the phenomena of low density values, air leakage, high pressure, high temperature of the different gas equipment, the pressure of a gas density relay, the self abnormal phenomena of a temperature sensor and self diagnosis results.
The electromechanical integrated digital display gas density relay can upload monitored data and information thereof in a PLC power carrier mode through an alarm signal line, a locking signal line or a special signal line of the density relay.
The electromechanical integrated digital display gas density relay comprises an intelligent component and a communication module, and the intelligent component can transmit information such as test data or/and state monitoring results remotely through the communication module.
The temperature sensor is arranged near a temperature compensation element of the gas density relay.
The electromechanical integration digital display gas density relay, the signal generator includes: a microswitch or a magnetically assisted electrical contact; the pressure detector includes: a bourdon tube or bellows; the temperature compensation element includes: a compensation element formed by a bimetallic strip or a compensation element filled with a compensation gas.
The electromechanical integrated digital display gas density relay further comprises a shielding piece for shielding an electric field and/or a magnetic field.
The electromechanical integrated digital display gas density relay is characterized in that the shielding piece is arranged inside or outside the electronic part.
The electromechanical integrated digital display gas density relay is characterized in that the pressure sensor is provided with a shielding piece.
The electromechanical integrated digital display gas density relay is characterized in that the intelligent component and/or the communication module are/is provided with a shielding piece.
The electromechanical integrated digital display gas density relay also comprises a plurality of insulating pieces, and the pressure sensor is insulated from the shell of the density relay by the insulating pieces; or the insulation between the housing of the pressure sensor and the housing of the gas density relay.
The electromechanical integrated digital display gas density relay comprises a micro intelligent component and an edge calculation unit, wherein the edge calculation unit obtains the corresponding density value P20Performing depth calculation to obtain accurate density value P20 is accurate。
The electromechanical integrated digital display gas density relay is characterized in that the depth calculation processing comprises the following steps: the edge calculation unit of the intelligent component calculates and processes the detected gas density value by adopting an average value method to obtain a gas density value P20Average value P of20 averageThe average value P20 averageIs the exact density value P20 is accurate(ii) a Or, setting temperature interval step length in a set time interval, and carrying out average value calculation processing on density values (N) of different temperature values acquired in all temperature ranges to obtain a gas density value P20Average value P of20 averageTo obtain accurate density value P20 is accurate(ii) a Or, setting pressure interval step length in a set time interval, and carrying out average value calculation processing on density values (N) of different pressure values acquired in all pressure variation ranges to obtain a gas density value P20Average value P of20 averageTo obtain accurate density value P20 is accurate。
The electromechanical integrated digital display gas density relay is characterized in that the depth calculation processing comprises the following steps: the edge calculation unit of the intelligent component calculates the gas density value P for a certain interval time20Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation20 is accurate。
The electromechanical integrated digital display gas density relay is characterized in that the depth calculation processing comprises the following steps: the edge calculation unit of the intelligent component decomposes the components into trend, periodicity and random components according to the time sequence, and judges the gas leakage condition according to the trend components.
The electromechanical integrated digital display gas density relay also comprises a check interface and a valve, and the gas density relay is checked without being disassembled through the check interface and the valve; alternatively, the electrical equipment is subjected to air make-up or/and micro-water testing.
The electromechanical integrated digital display gas density relay is characterized in that the digital display element is independently arranged and is connected with the gas density relay in a wired or wireless mode.
The invention achieves the following technical effects:
the invention provides a gas density relay, which consists of a mechanical part and an electronic part, wherein the gas density is monitored by a pressure detector and a temperature compensation element of the mechanical part, the monitoring of the gas density is realized by combining a plurality of signal generators, when the gas density is lower than or/and higher than the set gas density, an alarm or/and a locking contact signal is output by the plurality of signal generators, and the mechanical part is reliable and is not afraid of interference. Pressure and temperature signals are acquired by a pressure sensor and a temperature sensor of the electronic part, and corresponding density values P are obtained through processing of an intelligent component according to gas pressure-temperature characteristics20(i.e.a pressure value P of 20 ℃ C.)20) And then displaying the corresponding density value P through a digital display element20(i.e.a pressure value P of 20 ℃ C.)20) The device has the advantages of convenient and accurate reading, capability of finding the leakage problem of the electrical equipment in time and capability of processing in time. Not allowing too much SF6The gas leaks into the atmosphere, and the environment is protected. The gas density relay provided by the invention has the advantages of convenience in production, low manufacturing cost, high monitoring precision, good electrical performance, long service life and the like.
Drawings
FIG. 1 is a schematic structural diagram of a sulfur hexafluoride gas density relay in the prior art;
FIG. 2 is a schematic front view of a first embodiment of the present invention;
FIG. 3 is a schematic side view of a first embodiment of the present invention;
FIG. 4 is a schematic circuit diagram according to a first embodiment of the present invention;
FIG. 5 is a diagram of a gas density monitoring system consisting of an electromechanical integrated digital display gas density relay;
FIG. 6 is a diagram of a gas density monitoring system consisting of an electromechanical integrated digital display gas density relay;
FIG. 7 is a diagram of a gas density monitoring system composed of an electromechanical integrated digital display gas density relay.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The present embodiment takes a sulfur hexafluoride gas density relay as an example, and describes the structure of the electromechanical integrated digital display gas density relay provided by the present invention.
Fig. 2 and 3 are schematic structural views of an electromechanical integrated digital display gas density relay for high-voltage or medium-voltage electrical equipment according to an embodiment of the present invention, and as shown in fig. 2 and 3, the electromechanical integrated digital display gas density relay for high-voltage or medium-voltage electrical equipment according to an embodiment of the present invention mainly includes a mechanical portion 1 and an electronic portion 2 relatively independent from the mechanical portion. Which comprises the following steps: the communication module 4, the pressure sensor 201 and the pressure sensor fixing seat 209; the machine part 1 comprises: a machine part housing 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 1012, an end seat 108, a signal adjustment mechanism 107, a plurality of signal generators 109, a device connection joint 1010, and a temperature sensor 3, which are provided in the machine part housing. And the electronic part 2 comprises a pressure sensor 201, a temperature sensor 3, an intelligent component 202 and a digital display element 2012. The intelligent component 202 is respectively connected 2012 with the pressure sensor 201, the temperature sensor 3 and the digital display element. Pressure and temperature signals are acquired by the pressure sensor 201 and the temperature sensor 3, and corresponding density values P are obtained through processing of an intelligent component according to gas pressure-temperature characteristics20(i.e.a pressure value P of 20 ℃ C.)20) And then the corresponding density value P is displayed through a digital display element 201220(i.e.a pressure value P of 20 ℃ C.)20). The digital display element 2012 can be flexibly arranged, and the digital display element 2012 in the scheme is arranged in the mechanical part shell 101. Digital displayElement 2012 may also be disposed within electronics housing 2010; it may also be disposed outside the density relay housing 101 or housing 2010 by a connecting cable or wirelessly.
The electronic part 2 includes an electronic part housing 2010, and an intelligent part 202 and a power supply (power supply module) 203 provided in the electronic part 2 housing. The pressure sensor 201 is fixed on the pressure sensor fixing seat 209, and the pressure sensor 201 is communicated with the pressure detector 103 on an air path. The mechanical part shell 101 and the electronic part shell 2010 are independent or separated from each other, and the intelligent component 202 is connected with the temperature sensor 3, the pressure sensor 201 and the communication module 4 respectively. The pressure sensor 201 is fixed to the sensor housing 207 by sealing with the insulators 204, 205, 206, and then fixed to the pressure sensor holder 209 by re-mounting. The shielding piece 208 is arranged in the sensor shell 207, so that the interference resistance of the remote transmission density relay is improved. Meanwhile, a shielding part 2011 is arranged on the inner side (or the outer side) of the casing 2010, so that the anti-interference capacity of the remote transmission density relay is further improved. One end of the pressure detector 103 and one end of the temperature compensation element 104 are both fixed on the end seat 108, the other end of the pressure detector 103 is hermetically connected to the base 102, and the other end of the temperature compensation element 104 is connected with the movement 105 through a link or the other end of the temperature compensation element 104 is directly connected with the movement 105. The signal generator 109 can adopt a microswitch or a magnetic auxiliary electric contact, and the contact signal of the density relay is output through the signal generator 109. The pressure detector 103 may employ a bourdon tube or a bellows tube. The temperature compensation element 104 may employ a compensation plate or a gas enclosed within a housing. The gas density relay of the present invention may further comprise: an oil-filled type density relay, an oil-free type density relay, a gas density meter, a gas density switch, or a gas pressure gauge. In the telemetering gas density relay according to the first embodiment of the present invention, the varying pressure and temperature are corrected by the temperature compensation element 104 based on the pressure detector 103 to reflect the variation of the (sulfur hexafluoride) gas density. The signal generator 109 serves as an output alarm latch contact signal. If the sulfur hexafluoride gas density value is reduced due to gas leakage, the pressure detector 103 generates corresponding reverse displacement, and a contact signal is output (alarm locking) through the temperature compensation element 104 and the signal generator 109, so that the sulfur hexafluoride gas density in equipment such as an electrical switch and the like is monitored and controlled through a mechanical principle, and the electrical equipment can work safely.
Fig. 4 is a schematic circuit diagram of an electromechanical integrated digital display gas density relay for a high-voltage or medium-voltage electrical device according to an embodiment of the present invention, as shown in fig. 4, an intelligent component 202 (which may be a general-purpose computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, a quantum chip, a photonic chip, an MCU, an FPGA, a PLC, an industrial control motherboard, an embedded main control board, or the like) and a power supply 203 may be: switching power supply, alternating current 220V, direct current power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery and the like. The intelligent component 202 acquires a pressure signal P through the pressure sensor 201, acquires a temperature signal T through the temperature sensor 3, and obtains a corresponding density value P through processing of the intelligent component 202 by using a mathematical model of the relation between the gas pressure and the temperature and adopting a soft measurement method20(i.e.a pressure value P of 20 ℃ C.)20) And then the corresponding density value P is displayed through a digital display element 201220(i.e.a pressure value P of 20 ℃ C.)20). The digital display element 2012 is arranged in the mechanical part shell 101, so that the reading can be accurately and conveniently performed, the leakage problem of the electrical equipment can be accurately and timely found, and the leakage problem can be timely processed. Excessive SF6 gas will not be allowed to leak into the atmosphere and cause environmental damage. In addition, the density value P can be remotely transmitted through the communication module 420Or value of density P20And the pressure value P and the temperature value T or the pressure value P and the temperature value T are adopted, so that the gas density value P of the electrical equipment is monitored on line20Or value of density P20Pressure value P and temperature value T, or pressure value P and temperature value T. For example, the remote transmission density relay is accessed into the comprehensive automatic online monitoring system of the transformer substation through data communication modes such as RS-485 and the like, is remotely transmitted to the central monitoring station of the unattended station, carries out real-time monitoring at the local and remote central monitoring stations of the transformer substation, and realizes SF6SF in electrical equipment6Density of gas inAnd (5) carrying out line monitoring.
The technical product of the invention, because the temperature sensor 3 and the temperature compensation element 104 are arranged together; or the temperature sensor 3 is arranged directly on the temperature compensation element 104; or the temperature sensor 3 is arranged near the temperature compensation element 104. Through the new design treatment, the performance is greatly improved.
The remote gas density relay further comprises a thermal insulation piece 5, wherein the thermal insulation piece 5 is arranged between the mechanical part shell 101 and the electronic part shell 2010; or the thermal insulation is provided at the power source (power module). The power supply (power supply module) 203 is located away from the temperature sensor 3 and the temperature compensation element 104.
The electronic part of the density relay further includes a shield 2011, and the shield 2011 can shield the electric field, or the magnetic field, or the electric field and the magnetic field. The shield 2011 is disposed inside or outside the electronics housing. The pressure sensor is provided with a shield 208. The intelligent component or the communication module is provided with a shielding piece; or the intelligent component and the communication module are both provided with shielding pieces. The remote transmission gas density relay further comprises insulators 204, 205 and 206, and the pressure sensor is connected with a pressure sensor shell 207 and a sensor fixing seat 209 through the insulators 204, 205 and 206; or the pressure sensor is hermetically fixed on a pressure sensor fixing seat 209 through a plurality of insulating pieces 204, 205 and 206.
The remote transmission gas density relay also comprises a plurality of insulating pieces, and the pressure sensor is insulated from the electronic part shell, the mechanical part shell and the equipment connecting joint through the plurality of insulating pieces; or the housing of the pressure sensor and the housing of the remote gas density relay are insulated. Through the innovative design and treatment, the performance of the device is greatly improved. Through specific comparison and test, as can be seen from table 1, the precision and the anti-interference capability of the remote transmission density relay adopting the technology have better performance than those of the remote transmission density relay in the prior art, have prominent substantive characteristics and remarkable progress, can greatly improve the precision and the anti-interference capability of the remote transmission density relay, and ensure the reliable and safe operation of a power grid.
As can be known from the table 1, the precision, the anti-interference capability and the stability of the density relay adopting the technology are very good, the high-precision requirement is met, and the environmental adaptability of the density relay can be improved. Meanwhile, the key points are that the intelligent power grid has strong anti-interference capability and good stability, and the reliability and the accuracy of the intelligent power grid are greatly improved. And in particular facilitate accurate readings.
Table 1 comparison table of contact performance of remote transmission density relay of the present invention and that of prior art remote transmission density relay
In addition, the mechanical part shell of the density relay is filled with shockproof liquid, an outgoing line sealing piece is further arranged in the mechanical part shell, and a connecting line of the temperature sensor 3 is connected with an intelligent component through the outgoing line sealing piece. The gas density relay further comprises a device connection 1010, which is arranged on the mechanical part or the electronic part. The density relay outputs a contact signal via a signal generator 109. The communication module 4 is arranged at the electronic part shell or the mechanical part shell, or the communication module and the intelligent component are integrally designed together. The pressure sensor is arranged in the electronic part shell or the mechanical part shell. The intelligent component automatically controls the whole monitoring process based on an embedded algorithm and a control program of an embedded system of the intelligent component, and comprises all peripherals, logic, input and output. The intelligent component automatically controls the whole monitoring process based on embedded algorithms and control programs of a general computer, an industrial personal computer, an ARM chip, an AI chip, a CPU, an MCU, an FPGA, a PLC and the like, an industrial control mainboard, an embedded main control board and the like, and comprises all peripherals, logics, input and output. The density relay may also include a movement, a pointer, a dial, with an indication, i.e. a double display.
The density relay also includes an electronic signal contact for monitoring the gas density value P of the electrical equipment when the electronic part is in operation20Lower or higher than the set density value P20 setWhen the system is used, the electronic part outputs an electronic signal contact, so that the operation and inspection personnel can know the abnormal information; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20The trend change value DeltaP of20Lower or higher than the set trend change value DeltaP20 setThen the relay outputs the notification signal contact; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20Average value P of20 averageLower or higher than the set density average value P20 average settingThe relay outputs the announcement signal contact A.
The density value P20The gas density value may be monitored in real time, or may be a gas density value obtained by an averaging method, or may be a trend value. The intelligent component calculates and processes the gas density value of the electrical equipment by adopting an average value method (mean value method) to obtain a gas density value P20Average value P of20 average. The average value method is as follows: setting collection frequency in set time interval, calculating average value of density values (N) of different time points obtained by all the collections to obtain gas density value P20Average value P of20 average. The trend change value DeltaP20Comprises the following steps: setting collection frequency in set time interval, calculating average value of density values (N) of different time points obtained by all the collections to obtain gas density value P20Average value P of20 averageThen, a trend calculation period T is setPeriod of timeObtaining a trend change value delta P20＝P20 average (previous T period value)-P20 average (T period)I.e. the mean value P20 averageFront-back period TPeriod of timeA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerWhen electricity is monitoredGas density value P of gas plant20The trend change value DeltaP of20＝P20 (previous T interval)-P20(T interval)I.e. density value P20Front-to-back time interval TSpacerA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerA set time length TLength of. Using a set time interval TSpacerSetting the collection frequency, and collecting all the density values P of different time points20Performing accumulative calculation to obtain an accumulative value sigmaP20Obtaining a trend change value delta P20＝∑P20 (previous T length)-∑P20 (when T length)I.e. the time length T before and afterLength ofCumulative value ΣP20The difference between them.
The set density value P20 setThe density value may be set as required or detected within a certain period of time as required. The intelligent component has gas density value P for a certain interval20Fourier transform is performed to convert to a corresponding frequency spectrum, periodic components are filtered out, or,
the components are decomposed into trend, periodic and random components according to the time series, and the gas leakage is judged according to the trend components. According to the obtained density value P of the electrical equipment20Lower or higher than the set density value P20 setThe relay outputs the announcement signal contact A. The set values can be modified and stored online. The density relay can input events such as air supplement or/and air release test and the like, and can carry out the gas density value P according to the corresponding events such as air supplement or/and air release test and the like20New calculations or adjustments. The density relay monitors the gas density value P in a certain short time20Gradually increasing to determine gas supplementing event, and according to the maximum gas density value P monitored at that time20Judging that the gas supplementing event is ended, and carrying out gas density value P20New calculations or adjustments. The density relay monitors the gas density value P in a certain short time20Gradually and slightly descendIt can be judged as a gassing test (micro water or decomposition) event and can be based on the minimum gas density value P monitored at that time20If so, judging that the air discharge test event is ended, and carrying out gas density value P20New calculations or adjustments. The density relay can record the events such as air supply, or/and air discharge test, and the like, such as time, or/and times, or/and gas quality. The set density value P20 setThe density value may be set as required or detected within a certain period of time as required. The electronic signal contact can be realized by components such as an electromagnetic relay, a solid-state relay, a time relay, a power relay, a silicon controlled rectifier, an electronic switch, an electric contact, an optical coupler, DI, an MOS field effect transistor, a triode, a diode, an MOSFET relay and the like. The electronic signal contact is connected with the signal generator in parallel or in series, and an abnormal signal is uploaded through an alarm or locking signal line of the density relay, so that the operation and inspection personnel can know the abnormal information; or, the abnormal signal is uploaded through other signal lines, so that the operation and inspection personnel can know the abnormal information. The intelligent component collects pressure values and temperature values through a pressure sensor and a temperature sensor, and then converts the pressure values and the temperature values into corresponding pressure values P of 20 ℃ according to gas characteristics and the collected gas pressure values and temperature values20I.e. density value P20. When density value P20Is less than or equal to the set value P20 setAnd in time, the intelligent component can upload abnormal signals through an alarm contact signal wire of the density relay, so that the operation and inspection personnel can know abnormal information. Or when the density value P is20Is less than or equal to the set value P20 setAnd meanwhile, the intelligent component can upload the abnormal signals through the communication module, so that the operation and inspection personnel can know the abnormal information. The set value may be: the density value is set according to the requirement or detected within a certain period of time according to the requirement.
The intelligent component collects pressure values and temperature values through a pressure sensor and a temperature sensor, and then converts the pressure values and the temperature values into corresponding pressure values of 20 ℃ according to gas characteristics, namely density values P20. When density isValue P20Is smaller, when the trend value is greater than or equal to the set value DeltaP20 setIn time, the intelligent component can upload abnormal signals through the alarm contact signal line of the density relay, so that the operation and inspection personnel can know abnormal information (air leakage).
Or when the density value P is20Is smaller, when the trend value is greater than or equal to the set value DeltaP20 setAnd meanwhile, the intelligent component can upload the abnormal signals through the communication module, so that the operation and inspection personnel can know the abnormal information. The pressure sensor, the temperature sensor may be a pressure sensor, a temperature sensor, or a density measurement sensor.
The gas density relay also comprises an electronic signal contact, and when the gas pressure value or the temperature value of the electrical equipment monitored by the electronic part is lower than or higher than the set pressure value or temperature value, the electronic part outputs the electronic signal contact. The electronic part outputs the electronic signal contact when the gas pressure value of the electrical equipment monitored by the electronic part is lower than or higher than the set pressure value; or the electronic part also comprises an electronic signal contact, and when the gas temperature value of the electrical equipment monitored by the electronic part is lower than or higher than the set temperature value, the electronic part outputs the electronic signal contact. According to actual needs, the electronic signal contacts are connected to the signal generator in parallel or in series; or the electronic signal contacts are connected in parallel or in series to the control loop corresponding to the signal generator; or the electronic signal contacts are connected in parallel and/or in series to the signal generator. According to actual needs, the electronic signal contacts are connected in parallel or in series with the corresponding signal generators; or the electronic signal contacts are connected in parallel and/or in series with the respective signal generator.
The density relay outputs a mechanical contact signal through the signal generator. The gas density relay also comprises a micro-water sensor which can monitor the gas micro-water value on line, and when the micro-water value exceeds a set value, the electronic part outputs an electronic signal contact.
The gas density relay also comprises a decomposed product sensor which can monitor the decomposed product of the gas on line, and when the content of the decomposed product exceeds a set value, the electronic part outputs an electronic signal contact. The gas density relay can connect the monitored data and information thereof to a signal generator or a special line or other lines in parallel or in series through an output electronic signal contact, and upload the data and the information through regular coding. In particular, it may relate to: monitored density value, pressure value, temperature value, mechanical contact signal state information, abnormal information (self abnormal phenomena such as over-low density value, over-high pressure, over-high temperature of electrical equipment, pressure of gas density relay, temperature sensor and the like), and self-diagnosis result. The gas density relay can upload monitored data and information thereof in a PLC power carrier mode through an alarm signal line, a locking signal line or a special signal line of the density relay. The intelligent component also comprises a communication module, and the remote transmission of information such as test data or/and state monitoring results is realized through the communication module. The communication mode of the communication module can be a wired mode or a wireless mode.
The temperature sensor is arranged near a temperature compensation element of the gas density relay. The signal generator includes: a microswitch or a magnetically assisted electrical contact; the pressure detector includes: a bourdon tube or bellows; the temperature compensation element includes: a compensation element formed by a bimetallic strip or a compensation element filled with a compensation gas. The density relay also comprises a shielding piece which can play a role in shielding an electric field, or a magnetic field, or the electric field and the magnetic field. The intelligent component or the communication module is provided with a shielding piece; or the intelligent component and the communication module are both provided with shielding pieces. The gas density relay also comprises a plurality of insulating pieces, and the pressure sensor is insulated from the shell of the density relay through the insulating pieces; or the housing of the pressure sensor and the housing of the gas density relay are insulated.
Said intelligent part of said gas density relay comprises an edge calculation unit which calculates the corresponding density value P obtained20Performing depth calculation to obtain accurate density value P20 is accurate. The depth calculation process comprises the following steps: edges of the smart componentThe calculation unit calculates and processes the detected gas density value by using an average value method (mean value method) to obtain a gas density value P20Average value P of20 averageThe average value P20 averageIs the exact density value P20 is accurate. The average value method is as follows: setting collection frequency in set time interval, calculating average value of density values (N) of different time points obtained by all the collections to obtain gas density value P20Average value P of20 averageTo obtain accurate density value P20 is accurate. The depth calculation process comprises the following steps: the edge calculation unit of the intelligent component calculates the gas density value P for a certain interval time20Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation20 is accurate. The depth calculation process comprises the following steps: the edge calculation unit of the intelligent component decomposes the components into trend, periodicity and random components according to the time sequence, and judges the gas leakage condition according to the trend components.
The gas density relay also comprises a check interface and a valve, and the gas density relay can be checked without being disassembled through the check interface and the valve; alternatively, the first and second electrodes may be,
the gas density relay also comprises a check interface and a valve, and the gas density relay can be checked without being disassembled through the check interface and the valve, or/and the gas supplementing or/and micro-water testing can be carried out on the electrical equipment through the check interface.
The digital display element is independently arranged and can be connected with the gas density relay in a wired or wireless mode. The installation and reading are convenient.
Fig. 5 is a gas density monitoring system composed of an electromechanical integrated digital display gas density relay, as shown in fig. 5, including: a plurality of high-voltage electrical equipment provided with air chambers and a plurality of electromechanical integrated digital display gas density relays are connected with a remote background detection system sequentially through a concentrator and a protocol converter; the electromechanical integrated digital display gas density relay is respectively arranged on the high-voltage electrical equipment corresponding to the gas chamber. The gas density monitoring system that comprises electromechanical integration digital display gas density relay includes: a plurality of high-voltage electrical equipment provided with air chambers and a plurality of electromechanical integrated digital display gas density relays are connected with a remote background detection system through a concentrator and an IEC61850 protocol converter in sequence; the electromechanical integrated digital display gas density relay is respectively arranged on the high-voltage electrical equipment corresponding to the gas chamber.
As shown in fig. 5 and 6, the PC is an online monitoring background host and system, the Gateway is a network switch, the Server is an integrated application Server, the ProC is a protocol converter/online monitoring intelligent unit, the HUB is a concentrator, and Z is an electromechanical integrated digital display gas density relay. The online monitoring system architecture: the system diagrams of the simple architecture (fig. 5), the conventional architecture (fig. 6), the complex architecture, and the like are detailed. System architecture diagram and brief description: 1. a background software platform: based on Windows, Linux, and the like, or VxWorks, Android, Unix, UCos, FreeRTOS, RTX, embOS, MacOS. 2. Background software key business module, basic function: such as rights management, device management, data storage queries, etc.; and user management, alarm management, real-time data, historical data, real-time curves, historical curves, configuration management, data acquisition, data analysis, recording conditions, and exception handling. 3. Interface configuration: such as Form interface, Web interface, configuration interface, etc. The monitoring system can also be an architecture system diagram of a wireless transmission mode, as shown in fig. 7, the wireless module and the electromechanical integrated digital display gas density relay can be integrated or separated, and the specific scheme can be flexible.
The gas density monitoring system is composed of electromechanical integrated digital display gas density relays, and the communication modes of the electromechanical integrated digital display gas density relays are wired or wireless. Wired communication modes comprise industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carriers and the like; the wireless communication mode is that the sensor embeds 5G/NB-IOT communication module (for example 5G, NB-IOT), 2G/3G/4G/5G etc. WIFI, bluetooth, Lora, loraan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar etc. upload various sensor data to thing networking cloud platform. The hub adopts an RS485 hub, and the IEC61850 protocol converter is also respectively connected with the network service printer and the network data router.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (42)

1. An electromechanical integrated digital display gas density relay is characterized by comprising a mechanical part and an electronic part which is relatively independent from the mechanical part; the mechanical part comprises a pressure detector, a temperature compensation element and a plurality of signal generators; the pressure detector and the temperature compensation element monitor the gas density and are combined with a plurality of signal generators to realize the monitoring of the gas density when the gas density is lower than or/and higher than the set gas density P20 setWhen the alarm is used, a plurality of signal generators output alarm or/and locking contact signals; the electronic part comprises a pressure sensor, a temperature sensor, an intelligent component and a digital display element; the intelligent component is respectively connected with the pressure sensor, the temperature sensor and the digital display element; pressure and temperature signals are acquired through a pressure sensor and a temperature sensor, and corresponding density values P are obtained through processing of an intelligent component according to gas pressure-temperature characteristics20And then displaying the corresponding density value P through a digital display element20。
2. The electromechanically integrated digital display gas density relay according to claim 1, further comprising a communication unit, wherein the intelligent component sends the obtained density value P via the communication unit20Uploading to target equipment or target platform to further realize on-line monitoring of electrical equipmentGas density value P20(ii) a Alternatively, the first and second electrodes may be,
the intelligent component obtains the corresponding density value P through the communication unit20And the pressure value P and the temperature value T, or the pressure value P and the temperature value T are uploaded to target equipment or a target platform, so that the gas density value P of the electrical equipment is comprehensively monitored on line20。
3. The electromechanically integrated digital-display gas density relay according to claim 1, wherein the density value P is greater than the reference value20The gas density value is monitored in real time or obtained by an average value method20 averageOr the trend value Δ P20。
4. The electromechanically integrated digital display gas density relay according to claim 1 or 3, further comprising an electronic signal contact for monitoring the gas density P of the electrical equipment when the electronic part is in operation20Lower or higher than the set density value P20 setWhen the system is used, the electronic part outputs an electronic signal contact, so that the operation and inspection personnel can know the abnormal information; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20The trend change value DeltaP of20Lower or higher than the set trend change value DeltaP20 setThen the relay outputs the notification signal contact; alternatively, the first and second electrodes may be,
at set time intervals, when the gas density value P of the monitored electric equipment20Average value P of20 averageLower or higher than the set density average value P20 average settingThe relay outputs the notification signal contact.
5. The electromechanically integrated digital display gas density relay according to claim 3, wherein the average method is: setting collection frequency in a set time interval, and carrying out average calculation processing on N densities of different time points obtained by all the collections to obtain a gas density value P20Average value P of20Average(ii) a Alternatively, the first and second electrodes may be,
setting temperature interval step length in a set time interval, and carrying out average value calculation processing on density values of different temperature values acquired in all temperature ranges to obtain a gas density value P20Average value P of20 average(ii) a Alternatively, the first and second electrodes may be,
setting pressure interval step length in a set time interval, and carrying out average value calculation processing on density values of different pressure values acquired in all pressure variation ranges to obtain a gas density value P20Average value P of20 average。
6. The electromechanically integrated digital-display gas density relay according to claim 3, wherein the trend-change value Δ P20Comprises the following steps: setting collection frequency in set time interval, calculating average value of density values of different time points to obtain gas density value P20Average value P of20 averageThen, a trend calculation period T is setPeriod of timeObtaining a trend change value delta P20＝P20 average (previous T period value)-P20 average (T period)I.e. the mean value P20 averageFront-back period TPeriod of timeA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerWhen the gas density value P of the monitored electrical equipment is20The trend change value DeltaP of20＝P20 (previous T interval)-P20(T interval)I.e. density value P20Front-to-back time interval TSpacerA difference of (d); alternatively, the first and second electrodes may be,
at a set time interval TSpacerA set time length TLength of. Using a set time interval TSpacerSetting the collection frequency, and collecting all the density values P of different time points20Performing accumulative calculation to obtain an accumulative value sigmaP20Obtaining a trend change value delta P20＝∑P20 (previous T length)-∑P20 (when T length)I.e. the time length T before and afterLength ofCumulative value∑P20The difference between them.
7. The electromechanically integrated digital display gas density relay according to claim 1, wherein the set density value P is20 setThe density value is set according to the requirement, or the density value detected within a certain period of time before according to the requirement.
8. An electromechanically integrated digital-display gas density relay according to claim 1, 4 or 5, wherein the intelligent component has a gas density value P at intervals20Fourier transform is performed to convert to a corresponding frequency spectrum, periodic components are filtered out, or,
the components are decomposed into trend, periodic and random components according to the time series, and the gas leakage is judged according to the trend components.
9. The electromechanically integrated digital display gas density relay according to claim 8, wherein the obtained density value P of the electrical equipment is used as a reference20Lower or higher than the set density value P20 setThe relay outputs the notification signal contact.
10. The electromechanically integrated digital display gas density relay according to claim 1 or 2, wherein the set values are modifiable and storable online.
11. The electromechanically integrated digital display gas density relay according to claim 1 or 2, characterized in that it has input gas supply or/and gas discharge test events and performs the gas density value P according to the corresponding gas supply or/and gas discharge test events20New calculations or adjustments.
12. An electromechanically integrated digital display gas density relay according to claim 1 or 2, characterized in that it monitors the gas density P within a certain short time20Become increasingly apparentIncreasing, judging as gas supplementing event, and monitoring maximum gas density value P at that time20Judging that the gas supplementing event is ended, and carrying out gas density value P20New calculations or adjustments.
13. The electromechanically integrated digital display gas density relay according to claim 1 or 2, wherein the density relay monitors the gas density value P within a certain short time20Gradually slightly decreasing, judging as a deflation test event, and according to the minimum gas density value P monitored at that time20If so, judging that the air discharge test event is ended, and carrying out gas density value P20New calculations or adjustments.
14. An electromechanically integrated digital display gas density relay according to claim 13 or 14, characterized in that it simultaneously records the gas supply, or/and the gassing test events, such as time, or/and number, or/and gas quality.
15. The electromechanically integrated digital display gas density relay according to claim 1, wherein the set density value P is set20 setThe density value may be set as required or detected within a certain period of time as required.
16. An electromechanically integrated digital display gas density relay according to claim 4, wherein the electronic signal contacts include, but are not limited to, one or more of electromagnetic relays, solid state relays, time relays, power relays, thyristors, electronic switches, electrical contacts, optocouplers, DI, MOS FETs, triodes, diodes, MOS FET relays.
17. The electromechanical digital display gas density relay according to claim 16, wherein the electronic signal contact is connected in parallel or in series with the signal generator, and an abnormal signal is uploaded through an alarm or blocking signal line of the density relay, so that an operator can know abnormal information; alternatively, the first and second electrodes may be,
and abnormal signals are uploaded through other signal lines, so that the operation and inspection personnel can know the abnormal information.
18. The electromechanical digital display gas density relay according to claim 1, wherein the intelligent component collects pressure and temperature values through a pressure sensor and a temperature sensor, and then converts the collected pressure and temperature values into corresponding pressure values P of 20 ℃ according to gas characteristics20I.e. density value P20. When density value P20Is less than or equal to the set value P20 setAnd in time, the intelligent component can upload abnormal signals through an alarm contact signal wire of the density relay, so that the operation and inspection personnel can know abnormal information.
Or when the density value P is20Is less than or equal to the set value P20 setAnd in time, the intelligent component uploads an abnormal signal through the communication module, so that the operation and inspection personnel can know abnormal information.
19. The electromechanical integrated digital display gas density relay according to claim 1, wherein the set value is: the density value is set according to the requirement or detected within a certain period of time according to the requirement.
20. The mechatronic digital display gas density relay according to claim 1 or 5, wherein the intelligent component collects pressure values and temperature values through a pressure sensor and a temperature sensor, and then converts the pressure values and the temperature values into corresponding pressure values of 20 ℃ according to gas characteristics, namely a density value P, according to the collected pressure values and temperature values of the gas20. When density value P20Is smaller, when the trend value is greater than or equal to the set value DeltaP20 setWhen the intelligent component is used, the intelligent component can upload an abnormal signal through an alarm contact signal wire of the density relay, so that the operation and inspection personnel can know the abnormal information of air leakage;
or when the density value P is20Is smaller, when the trend value is greater than or equal to the set value DeltaP20 setAnd in time, the intelligent component uploads an abnormal signal through the communication module, so that the operation and inspection personnel can know abnormal information.
21. The electromechanically integrated digital display gas density relay according to claim 1, further comprising a density measurement sensor.
22. The electromechanically integrated digital display gas density relay according to claim 1, further comprising an electronic signal contact, wherein the electronic part outputs the electronic signal contact when the gas pressure value of the electrical equipment monitored by the electronic part is lower or higher than a set pressure value, or when the gas temperature value of the electrical equipment monitored by the electronic part is lower or higher than a set temperature value.
23. An electromechanically integrated digital display gas density relay according to claim 1 or 2, wherein the electronic signal contacts are connected in parallel or in series with the respective signal generators.
24. The electromechanically integrated digital display gas density relay according to claim 1, wherein it outputs a mechanical contact signal via a signal generator.
25. The electromechanical digital display gas density relay according to claim 1, characterized in that it further comprises a micro water sensor for on-line monitoring of gas micro water value, and when the micro water value exceeds a set value, the electronic part outputs an electronic signal contact.
26. The electromechanically integrated digital display gas density relay according to claim 1, further comprising a decomposition product sensor for online monitoring of gas decomposition products, wherein the electronic part outputs an electronic signal connection point when the content of the decomposition products exceeds a set value.
27. The electromechanical digital display gas density relay according to claim 1 or 2, characterized in that the gas density relay connects the monitored data and information in parallel or in series to the signal generator or dedicated line or other lines through the output electronic signal contact, and uploads the data and information through regular coding; the data and information relate to one or more of monitored density values, pressure values, temperature values, mechanical contact signal state information, the phenomena of low density values, air leakage, high pressure, high temperature of the different gas equipment, the pressure of a gas density relay, the self abnormal phenomena of a temperature sensor and self diagnosis results.
28. The electromechanical digital display gas density relay according to claim 1 or 2, characterized in that the monitored data and information thereof can be uploaded by PLC power carrier via the alarm signal line, or the locking signal line, or the dedicated signal line of the density relay.
29. The electromechanical digital display gas density relay according to claim 1, wherein the intelligent component further comprises a communication module, and the communication module is used for transmitting information such as test data or/and state monitoring results remotely.
30. An electromechanically integrated digital display gas density relay according to claim 1, wherein the temperature sensor is arranged in the vicinity of a temperature compensation element of the gas density relay.
31. The electromechanically integrated digital display gas density relay according to claim 1, wherein the signal generator comprises: a microswitch or a magnetically assisted electrical contact; the pressure detector includes: a bourdon tube or bellows; the temperature compensation element includes: a compensation element formed by a bimetallic strip or a compensation element filled with a compensation gas.
32. The electromechanically integrated digital display gas density relay according to claim 1, further comprising a shield to shield electric and/or magnetic fields.
33. An electromechanically integrated digital-display gas density relay according to claim 33, wherein the shield is arranged inside or outside the electronic part.
34. An electromechanically integrated digital-display gas density relay according to claim 1, wherein the pressure sensor is provided with a shield.
35. An electromechanically integrated digital-display gas density relay according to claim 1, characterized in that the intelligent component and/or the communication module is provided with a shield.
36. The electromechanical digital display gas density relay according to claim 1, characterized in that it further comprises a plurality of insulating members, wherein the pressure sensor is insulated from the housing of the density relay by the plurality of insulating members; or the insulation between the housing of the pressure sensor and the housing of the gas density relay.
37. The electromechanically integrated digital-display gas density relay according to claim 1, wherein the micro-intelligent component comprises an edge calculation unit that obtains the corresponding density value P20Performing depth calculation to obtain accurate density value P20 is accurate。
38. The electromechanically integrated digital display gas density relay according to claim 37, wherein the depth calculation process is: the edge calculation unit of the intelligent component calculates and processes the detected gas density value by adopting an average value method to obtain a gas density value P20Average value P of20 averageThe average value P20 averageIs the exact density value P20 is accurate。
39. The electromechanically integrated digital display gas density relay according to claim 37, wherein the depth calculation process is: the edge calculation unit of the intelligent component calculates the gas density value P for a certain interval time20Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation20 is accurate。
40. The electromechanically integrated digital display gas density relay according to claim 39, wherein the depth calculation process is: the edge calculation unit of the intelligent component decomposes the components into trend, periodicity and random components according to the time sequence, and judges the gas leakage condition according to the trend components.
41. The electromechanical integrated digital display gas density relay according to claim 1, 2 or 3, characterized in that it further comprises a check interface and a valve, through which the gas density relay is checked without disassembly; alternatively, the electrical equipment is subjected to air make-up or/and micro-water testing.
42. The electromechanical integrated digital display gas density relay according to claim 1 or 2, wherein the digital display element is arranged independently and is connected with the gas density relay in a wired or wireless manner.
CN201910830725.6A 2019-09-04 2019-09-04 Electromechanical integral digital display gas density relay Pending CN110618060A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111735559A (en) * 2020-06-29 2020-10-02 沈阳中科博微科技股份有限公司 Capacitive edge calculation pressure transmitter acquisition and diagnosis circuit and working method thereof
CN113777969A (en) * 2021-08-02 2021-12-10 广州巴兰仕机械有限公司 Automobile air conditioner pressure synchronous display control method, system and device and storage medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111735559A (en) * 2020-06-29 2020-10-02 沈阳中科博微科技股份有限公司 Capacitive edge calculation pressure transmitter acquisition and diagnosis circuit and working method thereof
CN113588141A (en) * 2020-06-29 2021-11-02 沈阳中科博微科技股份有限公司 Collecting and diagnosing working method of capacitive edge computing pressure transmitter
CN113777969A (en) * 2021-08-02 2021-12-10 广州巴兰仕机械有限公司 Automobile air conditioner pressure synchronous display control method, system and device and storage medium

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