CN110988667A - Gas density relay with online self-checking function and checking method thereof - Google Patents

Gas density relay with online self-checking function and checking method thereof Download PDF

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Publication number
CN110988667A
CN110988667A CN201911263996.4A CN201911263996A CN110988667A CN 110988667 A CN110988667 A CN 110988667A CN 201911263996 A CN201911263996 A CN 201911263996A CN 110988667 A CN110988667 A CN 110988667A
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China
Prior art keywords
gas density
gas
density relay
pressure
contact signal
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CN201911263996.4A
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Chinese (zh)
Inventor
常敏
黄小泵
夏铁新
郭正操
曾伟
金海勇
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Shanghai Roye Electric Science and Technology Co Ltd
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Shanghai Roye Electric Science and Technology Co Ltd
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Application filed by Shanghai Roye Electric Science and Technology Co Ltd filed Critical Shanghai Roye Electric Science and Technology Co Ltd
Priority to CN201911263996.4A priority Critical patent/CN110988667A/en
Publication of CN110988667A publication Critical patent/CN110988667A/en
Priority to PCT/CN2020/134703 priority patent/WO2021115289A1/en
Priority to US17/776,219 priority patent/US20220390518A1/en
Priority to EP20899597.7A priority patent/EP4075467A4/en
Pending legal-status Critical Current

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    • 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
    • G01R31/3272—Apparatus, systems or circuits therefor
    • 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
    • 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
    • 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
    • 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
    • H01H35/28—Compensation for variation of ambient pressure or temperature

Abstract

The application provides a gas density relay with an online self-checking function and a checking method thereof, which are used for high-voltage and medium-voltage electrical equipment and comprise a gas density relay body, a gas density detection sensor, a gas path partition pressure adjusting mechanism, an online checking contact signal sampling unit and an intelligent control unit. The unit control gas circuit is controlled to intelligence cuts off the motion of wall spare of pressure adjustment mechanism, cut off the gas circuit connection of first interface and second interface, seal chamber takes place the volume change simultaneously, thereby the gas pressure of gas density relay body slowly descends and takes place the contact action, the contact action is transmitted the intelligence through online check-up contact signal sampling unit and is controlled the unit, the intelligence is controlled the density value when the unit moves according to the contact and is detected out warning and/or shutting contact signal action value and/or return value, need not maintainer and just can accomplish the check-up to the scene, the reliability and the efficiency of electric wire netting have been improved greatly, the cost is reduced. Particularly, an electric control valve is not needed, so that the sealing performance is better, and the volume is smaller.

Description

Gas density relay with online self-checking function and checking method thereof
Technical Field
The invention relates to the technical field of electric power, in particular to a gas density relay with an online self-checking function and a checking method thereof, which are applied to high-voltage and medium-voltage electrical equipment.
Background
At present, SF6 (sulfur hexafluoride) electrical equipment is widely applied to electric power departments and industrial and mining enterprises, and rapid development of the electric power industry is promoted. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and the usage amount of SF6 electrical equipment is more and more. The SF6 gas plays a role in arc extinction and insulation in high-voltage electrical equipment, and the safe operation of the SF6 high-voltage electrical equipment is seriously influenced if the density of the SF6 gas in the high-voltage electrical equipment is reduced and the micro water content is exceeded: 1) the reduction of SF6 gas density to some extent will result in loss of insulation and arc extinguishing properties. 2) Under the participation of some metal substances, SF6 gas can generate hydrolysis reaction with water at the high temperature of more than 200 ℃ to generate active HF and SOF2The insulation and metal parts are corroded and generate a large amount of heat, so that the pressure of the gas chamber is increased. 3) When the temperature is reduced, excessive moisture can form condensed water, so that the surface insulation strength of the insulation part is obviously reduced, and even flashover is caused, thereby causing serious harm. Grid operating regulations therefore mandate that the density and moisture content of SF6 gas must be periodically checked both before and during operation of the equipment.
With the development of the unattended transformer substation towards networking and digitalization and the continuous enhancement of the requirements on remote control and remote measurement, the online monitoring method has important practical significance on the gas density and micro-water content state of SF6 electrical equipment. With the continuous and vigorous development of the intelligent power grid in China, intelligent high-voltage electrical equipment is used as an important component and a key node of an intelligent substation, and plays a significant role in improving the safety of the intelligent power grid. At present, most of high-voltage electrical equipment is SF6 gas insulation equipment, and if the gas density is reduced (caused by leakage and the like), the electrical performance of the equipment is seriously influenced, and serious hidden danger is caused to safe operation. At present, the online monitoring of the gas density value in the SF6 high-voltage electrical equipment is very common, and therefore, the application of the gas density monitoring system (gas density relay) is developed vigorously. Whereas current gas density monitoring systems (gas density relays) are basically: 1) the remote transmission type SF6 gas density relay is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. 2) The gas density transmitter is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. The SF6 gas density relay is the core and key component. However, because the environment for the field operation of the high-voltage substation is severe, especially the electromagnetic interference is very strong, in the currently used gas density monitoring system (gas density relay), the remote transmission type SF6 gas density relay is composed of a mechanical density relay and an electronic remote transmission part; in addition, the traditional mechanical density relay is reserved in a power grid system applying the gas density transmitter. The mechanical density relay is provided with one group, two groups or three groups of mechanical contacts, and can transmit information to a target equipment terminal through a contact connecting circuit in time when pressure reaches an alarm, locking or overpressure state, so that the safe operation of the equipment is ensured. Meanwhile, the monitoring system is also provided with a safe and reliable circuit transmission function, an effective platform is established for realizing real-time data remote data reading and information monitoring, and information such as pressure, temperature, density and the like can be transmitted to target equipment (generally a computer terminal) in time to realize online monitoring.
The periodic inspection of the gas density relay on the electrical equipment is a necessary measure for preventing the trouble in the bud and ensuring the safe and reliable operation of the electrical equipment. The 'electric power preventive test regulations' and the 'twenty-five key requirements for preventing serious accidents in electric power production' both require that the gas density relay be periodically checked. From the actual operation condition, the periodic verification of the gas density relay is one of the necessary means for ensuring the safe and reliable operation of the power equipment. Therefore, the calibration of the gas density relay has been regarded and popularized in the power system, and various power supply companies, power plants and large-scale industrial and mining enterprises have been implemented. And power supply companies, power plants and large-scale industrial and mining enterprises need to be equipped with testers, equipment vehicles and high-value SF6 gas for completing the field verification and detection work of the gas density relay. Including power failure and business loss during detection, the detection cost of each high-voltage switch station, which is allocated every year, is about tens of thousands to tens of thousands yuan. In addition, if the field check of the detection personnel is not standard in operation, potential safety hazards also exist. Therefore, it is necessary to innovate the existing gas density self-checking gas density relay, especially the gas density on-line self-checking gas density relay or system, so that the gas density relay for realizing the on-line gas density monitoring or the monitoring system formed by the gas density relay also has the checking function of the gas density relay, and then the regular checking work of the (mechanical) gas density relay is completed, no maintenance personnel is needed to arrive at the site, the working efficiency is greatly improved, and the cost is reduced. In order to avoid the need of an electric control valve, the sealing performance of the valve is better, the volume is smaller, the reliability is improved, the valve is beneficial to popularization and application, and new innovation is needed.
Disclosure of Invention
The present invention is directed to a gas density relay with an online self-calibration function, so as to solve the problems mentioned in the background.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first aspect of the present application provides a gas density relay with an online self-checking function, comprising: the gas density relay comprises a gas density relay body, a gas density detection sensor, a gas path blocking pressure adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit;
the gas density detection sensor is communicated with the gas density relay body;
the gas path of the gas density relay body is connected with a first interface of the gas path partition pressure adjusting mechanism;
the gas path partition pressure adjusting mechanism is also provided with a second interface communicated with the electrical equipment, and is configured to partition a gas path between the first interface and the second interface and adjust the pressure rise and fall of the gas density relay body to enable the gas density relay body to generate contact signal action;
the online check contact signal sampling unit is directly or indirectly connected with the gas density relay body and is configured to sample a contact signal of the gas density relay body;
the intelligent control unit is respectively connected with the gas density detection sensor, the gas circuit partition pressure adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the gas circuit partition pressure adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay body;
wherein the contact signal comprises an alarm, and/or a latch.
The second aspect of the present application provides a gas density monitoring device with an online self-calibration function, comprising: the gas density relay comprises a gas density relay body, a gas density detection sensor, a gas path blocking pressure adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit;
the gas density detection sensor is communicated with the gas density relay body;
the gas path of the gas density relay body is connected with a first interface of the gas path partition pressure adjusting mechanism;
the gas path partition pressure adjusting mechanism is also provided with a second interface communicated with the electrical equipment, and is configured to partition a gas path between the first interface and the second interface and adjust the pressure rise and fall of the gas density relay body to enable the gas density relay body to generate contact signal action;
the online check contact signal sampling unit is directly or indirectly connected with the gas density relay body and is configured to sample a contact signal of the gas density relay body;
the intelligent control unit is respectively connected with the gas density detection sensor, the gas circuit partition pressure adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the gas circuit partition pressure adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay body;
wherein the contact signal comprises an alarm, and/or a latch.
Preferably, the gas density detection sensor, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas path partition pressure adjusting mechanism; the gas circuit partition pressure adjusting mechanism is arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor, the gas circuit partition pressure adjusting mechanism, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor is arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor is arranged on the gas path partition pressure adjusting mechanism; alternatively, the first and second electrodes may be,
the gas density relay body is arranged on the gas path partition pressure adjusting mechanism; alternatively, the first and second electrodes may be,
the online checking contact signal sampling unit and the intelligent control unit are arranged on the gas circuit partition pressure adjusting mechanism.
Preferably, the gas density relay body and the gas density detection sensor are of an integrated structure; or the gas density relay body and the gas density detection sensor are a remote transmission type gas density relay with an integrated structure.
Preferably, the gas density detection sensor is of an integrated structure; or, the gas density detection sensor is a gas density transmitter with an integrated structure.
More preferably, online check joint signal sampling unit, the intelligence accuse unit sets up on the gas density transmitter.
Preferably, the online check joint signal sampling unit and the intelligent control unit are arranged together; preferably, the online check joint signal sampling unit and the intelligent control unit are sealed in a cavity or a shell.
Preferably, the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; or, a gas density transmitter consisting of a pressure sensor and a temperature sensor is adopted; alternatively, a density detection sensor using quartz tuning fork technology.
More preferably, the pressure sensor is mounted on the gas path of the gas density relay body or the gas path blocking pressure adjusting mechanism; the temperature sensor is arranged on or outside the gas path of the gas density relay body, or in the gas density relay body, or outside the gas density relay body.
Preferably, the intelligent control unit acquires a gas density value acquired by the gas density detection sensor; or, the intelligence accuse unit acquires the pressure value and the temperature value that gas density detection sensor gathered accomplish gas density relay or gas density monitoring devices are to the on-line monitoring of the gas density of the electrical equipment who monitors.
Preferably, the intelligent control unit acquires a gas density value acquired by the gas density detection sensor when the gas density relay body generates contact signal action or switching, and completes online verification of the gas density relay or the gas density monitoring device; alternatively, the first and second electrodes may be,
the intelligence accuse unit acquires when the gas density relay body takes place contact signal action or switches the pressure value and the temperature value that gas density detection sensor gathered to according to the pressure value that gas pressure-temperature characteristic conversion becomes corresponding 20 ℃, gas density value promptly, accomplish gas density relay or gas density monitoring devices's online check-up.
Preferably, the gas density relay body is provided with a comparison density value output signal which is connected with the intelligent control unit; alternatively, the first and second electrodes may be,
the gas density relay body has the pressure value output signal of comparing, should compare pressure value output signal with the intelligence is controlled the unit and is connected.
Preferably, the gas circuit partition pressure adjusting mechanism comprises a sealed cavity and a partition piece positioned in the sealed cavity, and the first interface and the second interface are both arranged on the wall of the sealed cavity and communicated with the inner space of the sealed cavity; the isolating piece is configured to isolate an air path between the first interface and the second interface and is used for adjusting the pressure rise and the pressure fall of the gas density relay body, so that the gas density relay body generates contact signal action.
More preferably, the gas circuit partition pressure adjusting mechanism further comprises a connecting piece and a driving part, and the partition piece is connected with the driving part through the connecting piece; alternatively, the first and second electrodes may be,
the separating piece and the connecting piece are integrally designed and are directly connected with the driving part; alternatively, the first and second electrodes may be,
the spacer is associated with the drive member by magnetic coupling;
wherein, preferably, the driving component includes, but is not limited to, one of a magnetic force, a motor, an electric push rod motor, a stepping motor, a reciprocating mechanism, a carnot cycle mechanism, an air compressor, a deflation valve, a pressure making pump, a booster valve, an electric air pump, an electromagnetic air pump, a pneumatic element, a magnetic coupling thrust mechanism, a heating thrust generating mechanism, an electric heating thrust generating mechanism, and a chemical reaction thrust generating mechanism.
Furthermore, a fifth interface is arranged at one end of the sealed cavity, one end of the connecting piece is connected with the partition piece, and the other end of the connecting piece penetrates out of the fifth interface and is connected to the driving part.
Further, the first interface is closer to the fifth interface than the second interface, or the first interface is farther from the fifth interface than the second interface.
Furthermore, the air path blocking pressure adjusting mechanism further comprises a sealing element connecting piece, the sealing element connecting piece is arranged at a fifth interface of the sealed cavity, and the other end of the connecting piece penetrates through the sealing element connecting piece to be connected with the driving part; preferably, the seal coupling comprises, but is not limited to, one of a bellows, a balloon, a sealing ring.
One end of the sealing coupling piece is connected with the fifth interface in a sealing mode, the other end of the sealing coupling piece is connected with the driving end of the driving part in a sealing mode, or the driving part is wrapped in the sealing coupling piece in a sealing mode through the other end of the sealing coupling piece.
Furthermore, the sealed cavity is a telescopic cavity, the driving part is positioned in the sealed cavity, and driving ends are arranged in two directions; the connecting piece comprises a first connecting piece and a second connecting piece which are respectively connected to the driving ends in two directions; the other end of the first connecting piece is connected with the inner wall of the sealed cavity; the other end of the second connecting piece is connected with the partition piece, the partition piece is provided with a through hole for communicating the inside of the sealing cavity with the second interface, a sealing piece is arranged on one side, facing the second interface, of the partition piece, and the sealing piece surrounds the through hole.
Still further, the seal is two sealing rings, and the perforation is located between the two sealing rings.
Further, the two driving ends face in opposite directions.
Further, the first port is connected to the gas density relay body via a connecting tube (preferably a capillary tube).
Furthermore, the first connecting piece is connected to the end of the sealed cavity body, which is provided with the first interface, in the direction opposite to the second connecting piece.
Furthermore, the sealed housing is provided with a fixed point whose position is not changeable, and the driving component is installed or connected on the fixed point.
Furthermore, during verification, the partition part of the gas circuit partition pressure adjusting mechanism moves under the driving of the driving part, the partition part partitions the gas circuit connection of the first interface and the second interface, and the gas pressure of the sealed cavity changes along with the position change of the partition part and is used for adjusting the pressure rise and fall of the gas density relay body so as to enable the gas density relay body to generate contact signal action.
More preferably, the edge of the partition is in sealing contact with the inner wall of the sealed cavity; preferably, the partition comprises, but is not limited to, one of a piston, a sealing partition.
Preferably, the air path blocking pressure adjusting mechanism is sealed in a cavity or a shell.
Preferably, the online verification contact signal sampling unit comprises an isolation sampling element, and the isolation sampling element is controlled by a gas density relay body, or a gas path isolation pressure adjusting mechanism, or an intelligent control unit; in a non-checking state, the online checking contact signal sampling unit is relatively isolated from the contact of the gas density relay body on a circuit through an isolation sampling element; in a checking state, the online checking contact signal sampling unit cuts off a contact signal control loop of the gas density relay body through an isolation sampling element, and connects the contact of the gas density relay body with the intelligent control unit; preferably, the isolated sampling element includes, but is not limited to, one of a travel switch, a micro switch, a button, an electric switch, a displacement switch, an electromagnetic relay, an optical coupler, and a thyristor.
Preferably, the gas density relay or gas density monitoring device further comprises: the gas density relay body and the gas path blocking pressure adjusting mechanism are arranged on the multi-way joint; or the gas path blocking pressure adjusting mechanism is fixed on the multi-way connector; alternatively, the first and second electrodes may be,
the gas density relay body, the gas density detection sensor and the gas path partition pressure adjusting mechanism are arranged on the multi-way connector.
More preferably, the gas density relay or the gas density monitoring apparatus further includes: the air supply interface is arranged on the air path partition pressure adjusting mechanism; or the air supply interface is arranged on the electrical equipment; or the air supply interface is arranged on the multi-way joint.
Preferably, the gas density relay or gas density monitoring device further comprises: the gas path isolation pressure adjusting mechanism is also provided with a third interface; one end of the valve is connected with a third interface of the gas path partition pressure adjusting mechanism, and the other end of the valve is directly or indirectly connected with electrical equipment; the first interface is located at a position between the second interface and the third interface.
More preferably, the valve is an electric valve or a solenoid valve.
Further, the valve is a permanent magnet type electromagnetic valve.
More preferably, the valve is a piezoelectric valve, or a temperature control valve, or a novel valve which is made of intelligent memory materials and is opened or closed by electric heating.
More preferably, the valve is closed or opened in a hose bending or flattening mode.
More preferably, the valve is sealed within a chamber or housing.
More preferably, the gas density relay or gas density monitoring apparatus further comprises: the self-sealing valve is arranged between the multi-way joint and the valve; or the valve is arranged between the multi-way joint and the self-sealing valve.
Preferably, the gas density relay or gas density monitoring device further comprises: respectively with the gas density relay body with the little water sensor that the unit is connected is controlled to the intelligence, and/or respectively with the gas density relay body with the decomposition thing sensor that the unit is connected is controlled to the intelligence.
More preferably, the gas density relay or gas density monitoring apparatus further comprises: gas circulation mechanism, gas circulation mechanism respectively with the gas density relay body with the unit is connected is controlled to the intelligence, gas circulation mechanism includes capillary, sealed cavity and heating element.
Further, the micro water sensor can be installed in a sealed chamber of the gas circulation mechanism, in a capillary, at a capillary port, and outside the capillary.
Preferably, the gas density relay or gas density monitoring device further comprises: the temperature adjusting mechanism is a temperature-adjustable adjusting mechanism and is configured to adjust the temperature rise and fall of a temperature compensation element of the gas density relay body, and then the gas density relay body is enabled to generate contact signal action by matching or/and combining with a gas circuit blocking pressure adjusting mechanism; the intelligent control unit is connected with the temperature adjusting mechanism to complete the control of the temperature adjusting mechanism.
More preferably, the temperature adjustment mechanism is a heating element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heat preservation piece, a temperature controller, a temperature detector and a temperature adjusting mechanism shell; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power adjuster and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a refrigerating element, a power regulator and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power regulator and a constant temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a controller and a temperature detector; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a heating element which is arranged near the temperature compensation element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a miniature thermostat;
the number of the heating elements is at least one, and the heating elements comprise but are not limited to one of silicon rubber heaters, resistance wires, electric heating tapes, electric heating rods, hot air blowers, infrared heating devices and semiconductors;
the temperature controller is connected with the heating element and used for controlling the heating temperature of the heating element, and the temperature controller comprises but is not limited to one of a PID controller, a controller combining PID and fuzzy control, a variable frequency controller and a PLC controller.
Preferably, the online verification of the gas density relay or the gas density monitoring device is completed by at least two gas density relay bodies, at least two gas path blocking pressure adjusting mechanisms, at least two online verification contact signal sampling units, an intelligent control unit and a gas density detection sensor; alternatively, the first and second electrodes may be,
the online calibration method comprises the following steps that at least two gas density relay bodies, at least two gas circuit partition pressure adjusting mechanisms, at least two online calibration contact signal sampling units, at least two intelligent control units and a gas density detection sensor are used for completing online calibration of the gas density relay or the gas density monitoring device; alternatively, the first and second electrodes may be,
at least two gas density relay bodies, at least two gas circuit partition pressure adjusting mechanisms, at least two online check contact signal sampling units, at least two gas density detection sensors and an intelligent control unit are used for completing the online check of the gas density relay or the gas density monitoring device.
Preferably, the gas density detection sensor comprises at least one pressure sensor, at least one temperature sensor.
Specifically, the pressure sensor may be an absolute pressure sensor, a relative pressure sensor, or an absolute pressure sensor and a relative pressure sensor; can be a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil induction pressure sensor (such as a pressure sensor with an induction coil of a Badon tube), a resistance pressure sensor (such as a pressure sensor with a slide wire resistor of a Badon tube); the pressure sensor can be an analog quantity pressure sensor or a digital quantity pressure sensor; the temperature sensor can be a thermocouple, a thermistor or a semiconductor type; contact and non-contact can be realized; can be a thermal resistor and a thermocouple.
More preferably, the pressure sensor includes, but is not limited to, a relative pressure sensor, and/or an absolute pressure sensor.
Further, when the pressure sensor is an absolute pressure sensor, the absolute pressure value is used for representing the pressure sensor, the calibration result is the corresponding absolute pressure value at 20 ℃, the relative pressure value is used for representing the calibration result, and the calibration result is converted into the corresponding relative pressure value at 20 ℃; when the pressure sensor is a relative pressure sensor, the relative pressure value is used for representing, the verification result is the corresponding relative pressure value at 20 ℃, the absolute pressure value is used for representing, and the verification result is converted into the corresponding absolute pressure value at 20 ℃; the conversion relation between the absolute pressure value and the relative pressure value is as follows:
Pabsolute pressure＝PRelative pressure+PStandard atmospheric pressure。
Preferably, the intelligent control unit acquires a gas density value acquired by the gas density detection sensor; or, the intelligence accuse unit acquires the pressure value and the temperature value that gas density detection sensor gathered accomplish the on-line monitoring of gas density relay to gas density, accomplish promptly the on-line monitoring of gas density relay to the electrical equipment who monitors.
More preferably, the intelligent control unit calculates the gas density value by using an average method (averaging method), wherein the average method is as follows: setting acquisition frequency in a set time interval, and carrying out average value calculation processing on N gas density values of different acquired time points to obtain the gas density values; or setting a temperature interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different temperature values acquired in all temperature ranges to obtain a gas density value; or setting a pressure interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different pressure values acquired in the whole pressure variation range to obtain a gas density value; wherein N is a positive integer greater than or equal to 1.
Preferably, the gas density relay body includes, but is not limited to, a bimetal compensated gas density relay, a gas compensated gas density relay, a bimetal and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6 gas density relay, SF6 mixed gas density relay, N2 gas density relay.
Preferably, the electrical equipment comprises SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmentally friendly gas electrical equipment, or other insulated gas electrical equipment.
Specifically, the electrical equipment comprises a GIS, a GIL, a PASS, a circuit breaker, a current transformer, a voltage transformer, a transformer, an inflatable cabinet and a ring main unit.
Preferably, the online verification contact signal sampling unit samples the contact signal of the gas density relay body to satisfy the following conditions: the online check contact signal sampling unit is provided with at least two groups of independent sampling contacts, can automatically check at least two contacts simultaneously, and continuously measures without replacing the contacts or reselecting the contacts; wherein the content of the first and second substances,
the contacts include, but are not limited to, one of an alarm contact, an alarm contact + latching 1 contact + latching 2 contact, an alarm contact + latching contact + overpressure contact.
Preferably, the online verification contact signal sampling unit is used for testing the contact signal action value or the switching value of the contact signal action value of the gas density relay body to be not lower than 24V, namely, during verification, the voltage of not lower than 24V is applied between corresponding terminals of the contact signal.
Preferably, the intelligent control unit automatically controls the whole verification process based on an embedded algorithm and a control program of an embedded system of the microprocessor, and comprises all peripherals, logic and input and output.
More preferably, the intelligent control unit automatically controls the whole verification process based on embedded algorithms and control programs such as a general-purpose 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 main board, an embedded main control board and the like, and includes all peripherals, logics, input and output.
Preferably, the intelligent control unit is provided with an electrical interface, and the electrical interface completes test data storage, and/or test data export, and/or test data printing, and/or data communication with an upper computer, and/or input of analog quantity and digital quantity information.
Preferably, the gas density relay or the gas density monitoring device supports basic information input, and the basic information comprises one or more of a factory number, a precision requirement, a rated parameter, a manufacturing plant and an operation position.
Preferably, the intelligent control unit further comprises a communication module for transmitting the test data and/or the verification result in a long distance.
More preferably, the communication mode of the communication module is a wired communication mode or a wireless communication mode.
Further, the wired communication mode comprises one or more of an RS232 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a PLC power carrier and a cable.
Furthermore, the wireless communication mode comprises one or more of NB-IOT, 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication and sonar.
Preferably, a clock is further arranged on the intelligent control unit, and the clock is configured to be used for regularly setting the verification time of the gas density relay body, or recording the test time, or recording the event time.
Preferably, the control of the intelligent control unit is controlled through a field control and/or a background control.
More preferably, the gas density relay or the gas density monitoring device completes the online verification of the gas density relay body according to the setting or the instruction of the background; alternatively, the first and second electrodes may be,
and completing the online verification of the gas density relay body according to the set verification time of the gas density relay body.
Preferably, the gas density relay or the gas density monitoring device further includes: and the display interface is used for man-machine interaction, is connected with the intelligent control unit, displays the current verification data in real time and/or supports data input.
Preferably, the gas density relay or the gas density monitoring device further includes: and the camera is used for monitoring.
Preferably, the gas density relay body includes: the device comprises a shell, a base, a pressure detector, a temperature compensation element and a plurality of signal generators, wherein the base, the pressure detector, the temperature compensation element and the signal generators are arranged in the shell; the first interface of the multi-way joint is communicated with the base; the online check contact signal sampling unit is connected with the signal generator;
the gas density relay body outputs a contact signal through the signal generator; the pressure detector comprises a bourdon tube or a bellows; the temperature compensation element adopts a temperature compensation sheet or gas sealed in the shell.
More preferably, at least one of the temperature sensors is arranged near or on or integrated in a temperature compensation element of the gas density relay body. Preferably, at least one temperature sensor is arranged at one end of the pressure detector of the gas density relay body, which is close to the temperature compensation element.
More preferably, the gas density relay body further comprises a display mechanism, the display mechanism comprises a movement, a pointer and a dial, and the movement is fixed on the base or in the shell; one end of the temperature compensation element is also connected with the movement through a connecting rod or directly connected with the movement; the pointer is arranged on the movement and in front of the dial, and the pointer is combined with the dial to display the gas density value; and/or
The display mechanism comprises a digital device or a liquid crystal device with a display value display.
More preferably, the gas density relay or the gas density monitoring apparatus further includes a contact resistance detection unit; the contact resistance detection unit is connected with the contact point signal or directly connected with the signal generator; under the control of the online checking contact signal sampling unit, the contact signal of the gas density relay body is isolated from a control loop of the gas density relay body, and when the contact signal acts and/or receives an instruction of detecting the contact resistance of the contact, the contact resistance detection unit can detect the contact resistance value of the contact of the gas density relay body.
More preferably, the gas density relay or the gas density monitoring apparatus further includes an insulation resistance detection unit; the insulation resistance detection unit is connected with the contact signal or directly connected with the signal generator; under the control of the online checking contact signal sampling unit, the contact signal of the gas density relay is isolated from a control loop of the gas density relay, and when the contact signal of the gas density relay acts and/or receives an instruction of detecting the contact insulation resistance, the insulation resistance detecting unit can detect the contact insulation resistance value of the gas density relay.
The third aspect of the present application provides a method for verifying a gas density relay, including:
in a normal working state, the gas density relay monitors the gas density value in the electrical equipment;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the gas circuit is controlled to cut off the pressure adjusting mechanism through the intelligent control unit, a cutting part of the gas circuit cutting off the pressure adjusting mechanism moves under the action of the driving part, the cutting part cuts off the gas circuit connection of the first interface and the second interface, and along with the movement of the cutting part, the volume of the sealing cavity changes, the pressure of the gas density relay body can be adjusted, the gas pressure of the gas density relay body is slowly reduced, the gas density relay body is enabled to generate contact action, the contact action is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to the pressure value and the temperature value when the contact acts, or directly obtains the gas density value, detects a contact signal action value of the gas density relay body, and the checking work of the contact signal action value of the gas density relay body is completed;
after all contact signal check-up work were accomplished, unit control gas circuit wall pressure adjustment mechanism was controlled to the intelligence, the gas circuit cuts off the wall piece of pressure adjustment mechanism and moves under driver part's effect, makes the gas circuit cut off the gas circuit of first interface and the second interface of pressure adjustment mechanism and communicates each other.
Preferably, a method for verifying a gas density relay includes:
in a normal working state, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment, and meanwhile, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment on line through the gas density detection sensor and the intelligent control unit;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the online check contact signal sampling unit is directly or indirectly adjusted to a check state through the intelligent control unit, and in the check state, the online check contact signal sampling unit cuts off a control loop of a contact signal of the gas density relay body and connects the contact of the gas density relay body to the intelligent control unit;
the gas circuit is controlled to cut off the pressure adjusting mechanism through the intelligent control unit, the cutting part of the gas circuit cutting off the pressure adjusting mechanism moves under the action of the driving part, the cutting part cuts off the gas circuit connection of the first interface and the second interface, and along with the movement of the cutting part, the volume of the sealed cavity changes, the pressure of the gas density relay body can be adjusted, the gas pressure of the gas density relay body is slowly reduced, the gas density relay body is enabled to generate contact action, the contact action is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to the pressure value and the temperature value when the contact acts, or directly obtains the gas density value, detects the contact signal action value of the gas density relay, and the checking work of the contact signal action value of the gas density relay is completed;
the gas circuit is driven by the intelligent control unit to cut off the pressure adjusting mechanism, so that the gas pressure slowly rises, the gas density relay body is subjected to contact resetting, the contact resetting is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value when the contact is reset or directly obtains the gas density value, a contact signal return value of the gas density relay body is detected, and the checking work of the contact signal return value of the gas density relay body is completed;
after all contact signal check-up work is accomplished, unit control gas circuit cuts off pressure adjustment mechanism is controlled to the intelligence, the gas circuit cuts off the wall piece of pressure adjustment mechanism and moves under driver part's effect, makes the gas circuit cut off the gas circuit of first interface and the second interface of pressure adjustment mechanism and communicates each other to adjust on-line check-up contact signal sampling unit to operating condition, the normal operating condition of operation is resumed to the control circuit of the contact signal of gas density relay body.
Preferably, a method for verifying a gas density relay includes:
the gas density relay or the gas density monitoring device further comprises a temperature adjusting mechanism; the method comprises the following steps:
in a normal working state, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment, and meanwhile, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment on line through the gas density detection sensor and the intelligent control unit;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the online check contact signal sampling unit is directly or indirectly adjusted to a check state through the intelligent control unit, and in the check state, the online check contact signal sampling unit cuts off a control loop of a contact signal of the gas density relay and connects a contact of the gas density relay body to the intelligent control unit;
through intelligent control unit control gas circuit wall pressure adjustment mechanism, the gas circuit wall pressure adjustment mechanism's wall piece moves under driver part's effect, it cuts off the gas circuit of first interface and second interface and connects to cut off the piece, and along with the motion of cutting off the piece, seal chamber's volume changes, can adjust the pressure of gas density relay body makes its gas pressure slowly descend to and control through intelligent control unit right temperature adjustment mechanism's control makes the temperature rise of the temperature compensation component of gas density relay body for gas density relay body takes place the contact action, and the contact action passes through online check-up contact signal sampling unit and transmits intelligent control unit to, and intelligent control unit obtains gas density value according to pressure value, temperature value when the contact action, or directly obtains gas density value, detects out gas density relay body's contact signal action value, finishing the checking work of the contact signal action value of the gas density relay body;
the gas circuit is driven by the intelligent control unit to cut off the pressure adjusting mechanism, so that the gas pressure slowly rises, the temperature of a temperature compensation element of the gas density relay body is reduced by controlling the temperature adjusting mechanism by the intelligent control unit, the gas density relay body is subjected to contact resetting, the contact resetting is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value when the contact is reset, or directly obtains the gas density value, the contact signal return value of the gas density relay is detected, and the checking work of the contact signal return value of the gas density relay body is completed;
after all contact signal check-up work is accomplished, unit control gas circuit cuts off pressure adjustment mechanism is controlled to intelligence, the gas circuit cuts off pressure adjustment mechanism's wall piece and moves under driver part's effect, makes the gas circuit cut off the gas circuit of pressure adjustment mechanism's first interface and second interface and communicates each other to and the heating element of unit shutoff temperature adjustment mechanism is controlled to intelligence, and will check up on line contact signal sampling unit and adjust operating condition, the normal operating condition of operation is resumed to the control circuit of the contact signal of gas density relay body.
Preferably, the contact signal comprises an alarm, and/or a latch.
Preferably, the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; alternatively, the first and second electrodes may be,
a gas density transmitter consisting of a pressure sensor and a temperature sensor is adopted; alternatively, the first and second electrodes may be,
a density detection sensor adopting quartz tuning fork technology.
Preferably, after the gas density relay is checked, if the gas density relay is abnormal, an alarm can be automatically sent out and uploaded to a remote end or sent to a designated receiver.
Preferably, the verification method further comprises: and displaying the gas density value and the verification result on site or on the background.
Preferably, the verification method further comprises: the intelligent control unit is controlled through field control and/or background control.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the application provides a gas density relay with an online self-checking function and a checking method thereof, which are used for high-voltage and medium-voltage electrical equipment and comprise a gas density relay body, a gas density detection sensor, a gas path partition pressure adjusting mechanism and an online checking functionThe device comprises a contact signal sampling unit and an intelligent control unit. Control the gas circuit through intelligence and cut off pressure adjustment mechanism, the gas circuit cuts off pressure adjustment mechanism's wall spare and moves under driver part's effect, it cuts off the gas circuit of first interface and second interface and connects to cut off the piece, and along with the motion of cutting off the piece, seal chamber's volume changes, can adjust the pressure of gas density relay body, make its gas pressure slowly descend or rise, make gas density relay body take place the contact action or reset, the contact action or reset is transmitted to intelligence through online check-up contact signal sampling unit and is controlled the unit, intelligence is controlled the density value when the unit is moved according to the contact, detect out warning and/or shutting contact signal action value and/or the return value of gas density relay body, need not the maintainer to the on-the-site just can accomplish gas density relay's check-up work, the reliability of electric wire netting is improved, the efficiency is improved, the cost is reduced, and the maintenance-free gas density relay can be realized. SF is realized in the whole checking process at the same time6Zero emission of gas and meeting the requirements of environmental protection regulations. Especially, an electric control valve is not needed, so that the sealing performance is better, the volume is smaller, the field reconstruction is convenient, the reliability is improved, and the popularization and the application are facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a gas density relay with an online self-checking function according to a first embodiment in an operating state;
FIG. 2 is a schematic structural diagram of a gas density relay with an online self-calibration function in an online calibration state according to the first embodiment;
FIG. 3 is a schematic circuit diagram of a gas density relay with an online self-checking function according to the first embodiment;
FIG. 4 is a schematic structural diagram of a gas density relay with an online self-checking function according to a second embodiment;
FIG. 5 is a schematic structural diagram of a gas density relay with an online self-calibration function according to a third embodiment;
FIG. 6 is a schematic structural diagram of a gas density relay with an online self-checking function according to a fourth embodiment;
FIG. 7 is a schematic structural view of a gas density relay body of a preferred embodiment;
FIG. 8 is a schematic structural diagram of a gas density relay with an online self-checking function according to a fifth embodiment;
FIG. 9 is a schematic structural diagram of a gas density relay with an online self-calibration function according to a sixth embodiment;
fig. 10 is a schematic structural diagram of a gas density relay with an online self-checking function according to the seventh embodiment.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
as shown in fig. 1, a gas density relay or a gas density monitoring device with an online self-calibration function according to a first embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a gas circuit partition pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and electrical equipment 8. Gas density relay body 1, pressure sensor 2, temperature sensor 3 and intelligent control unit 7 set up on gas circuit cuts off pressure adjustment mechanism 5. Fig. 1 is a schematic diagram of an operating state of a gas density relay or a gas density monitoring device with an online self-checking function.
Specifically, the air path blocking pressure adjusting mechanism 5 includes a sealed cavity 501, a blocking member 502, a blocking sealing member 503, a connecting member 504, a driving member 505, a first interface 506, a second interface 507, a sealing member coupling member 508, a fourth interface 509, and a contact signal interlock 5K. Wherein the partition 502 is arranged in the sealed cavity 501, the partition 502 is connected with the driving part 505 by the connecting member 504 and the seal coupling 508. The driving part 505 may be one of a mechanism including, but not limited to, a magnetic force, a motor, an electric push rod motor, a stepping motor, a reciprocating mechanism, a carnot cycle mechanism, an air compressor, a deflation valve, a pressurizing pump, a pressurizing valve, an electric air pump, an electromagnetic air pump, a pneumatic element, a magnetic coupling thrust mechanism, a heating thrust mechanism, an electric heating thrust mechanism, a chemical reaction thrust mechanism. The heating produces the thrust mechanism, for example, heats the bimetallic strip, and then produces the thrust mechanism. The driving member 505 is to move the partition 502 to turn off the gas path of the electrical equipment, to partition the gas path of the gas density relay body 1 from the gas path of the electrical equipment 8, and to adjust the gas pressure of the gas density relay body 1 to be raised or lowered, so as to actuate or reset the contact of the gas density relay body 1. The partition 502 is in sealing contact with the inner wall of the sealed cavity 501; the partition 502 includes, but is not limited to, one of a piston, a sealed partition. Seal coupling 508 is provided with sealed chamber 501 and connector 504 is connected to drive component 505 by seal coupling 508. Specifically, one end of the sealed cavity 501 is provided with a fifth interface, and the first interface 506 is closer to the fifth interface 530 than the second interface 507, or the first interface 506 is farther from the fifth interface 530 than the second interface 507, that is, the partition 502 cannot block the first interface 506 and the second interface 507 at the same time. A sealing coupling 508 is provided at the fifth interface 530 of the sealed housing 501, one end of which is sealingly connected to the fifth interface 530 and the other end of which is sealingly connected to the driving end of the driving member 505, or the other end of which sealingly encloses the driving member 505 within the sealing coupling 508. One end of a connector 504 is connected to the spacer 502 and the other end is connected to a drive member 505 through the seal coupling 508. The seal coupling 508 includes, but is not limited to, one of a bellows, a bladder, and a seal. The relative positions of the first interface 506 and the second interface 507 of the air path blocking pressure adjusting mechanism 5 are staggered. The second interface 507 of the gas circuit partition pressure adjusting mechanism 5 is directly or indirectly connected with the electrical equipment 8, and the first interface 506 of the gas circuit partition pressure adjusting mechanism 5 is directly or indirectly communicated with the gas density relay body 1; the pressure sensor 2 is connected to a fourth port 509 of the gas circuit blocking pressure adjusting mechanism 5. In the working state, the sealed cavity 501 of the gas path blocking pressure adjusting mechanism 5 is communicated with the gas paths of the gas density relay body 1 and the electrical equipment 8; the online check contact signal sampling unit 6 is respectively connected with the gas density relay body 1 and the intelligent control unit 7; the pressure sensor 2, the temperature sensor 3 and the air circuit isolation pressure adjusting mechanism 5 are respectively connected with the intelligent control unit 7; the isolation sampling element of online check contact signal sampling unit 6 sets up with contact signal interlocking piece 5K is corresponding, and when the check-up, contact signal interlocking piece 5K can cut off the contact signal control circuit of gas density relay body 1, when guaranteeing the check-up, the contact actuating signal of gas density relay body 1 can not upload, and then can not influence the safe operation of electric wire netting. The isolation sampling element of the online verification contact signal sampling unit 6 includes, but is not limited to, one of a travel switch, a microswitch, a button, an electric switch, a displacement switch, an electromagnetic relay, and an optocoupler.
Wherein, gas density relay body 1 includes: a bimetallic strip compensated gas density relay, a gas compensated gas density relay, or a bimetallic strip and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; a density relay with indication (a density relay displayed by a pointer, a density relay displayed by a digital code, a density relay displayed by a liquid crystal) and a density relay without indication (namely a density switch); SF6 gas density relay, SF6 hybrid gas density relay, N2 gas density relay, other gas density relays, and the like.
As shown in fig. 3, the intelligent control unit 7 mainly includes a processor 71(U1) and a power supply 72 (U2). The processor 71(U1) may be a general-purpose computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, an MCU, an FPGA, a PLC, etc., an industrial control motherboard, an embedded main control board, etc., and other intelligent integrated circuits. The power source 72(U2) may be a switching power source, ac 220V, dc power source, LDO, programmable power source, solar, battery, rechargeable battery, electric field induction power source, magnetic field induction power source, wireless charging power source, capacitive power source, or the like.
Type of pressure sensor 2: absolute pressure sensors, relative pressure sensors, or both absolute and relative pressure sensors, may be several in number. The pressure sensor 2 can be in the form of a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil-induced pressure sensor (such as a pressure measurement sensor with induction coil of a Badon tube), a resistance pressure sensor (such as a pressure measurement sensor with slide wire resistance of a Badon tube); the pressure sensor can be an analog pressure sensor or a digital pressure sensor. The pressure sensor is a pressure sensor, a pressure transmitter, and other pressure-sensitive elements, such as diffused silicon, sapphire, piezoelectric, and strain gauge (resistance strain gauge, ceramic strain gauge).
The temperature sensor 3 may be: a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be a thermal resistor and a thermocouple. In short, the temperature acquisition can be realized by various temperature sensing elements such as a temperature sensor, a temperature transmitter and the like.
The air path blocking pressure adjusting mechanism 5 of the present embodiment mainly includes a sealed cavity 501, a blocking member 502, a blocking sealing member 503, a connecting member 504, a driving member 505, a first interface 506, a second interface 507, a sealing member coupling member 508, a fourth interface 509, and a contact signal interlocking member 5K. The sealed housing 501 comprises a seal coupling 508, the seal coupling 508 consisting of a bellows. A partition 502 having a partition seal 503 therein is disposed in the sealed chamber 501, and the partition 502 is connected to a driving member 505 through a connector 504 and a seal coupling 508. The driving part 505 is composed of a motor, or an electric push rod motor, or a stepping motor, and a reciprocating mechanism. The partition 502 is in sealing contact with the inner wall of the sealed cavity 501 through a partition seal 503; the partition 502 includes, but is not limited to, one of a piston, a sealed partition. Since seal coupling 508 is located with sealed chamber 501, connector 504 is connected to drive component 505 through seal coupling 508, which ensures that the entire verification process is sealed.
As shown in fig. 3, the online verification contact signal sampling unit 6 is controlled by the contact signal interlocking part 5K, and mainly completes the contact signal sampling of the gas density relay body 1. Namely, the basic requirements or functions of the online verification contact signal sampling unit 6 are as follows: 1) the safe operation of the electrical equipment is not influenced during the verification. When the contact signal of the gas density relay body 1 acts during the calibration, the safe operation of the electrical equipment cannot be influenced; 2) the contact signal control loop of the gas density relay body 1 does not influence the performance of the gas density relay, particularly does not influence the performance of the intelligent control unit 7, and does not cause the gas density relay to be damaged or influence the test work.
The basic requirements or functions of the intelligent control unit 7 are as follows: the intelligent control unit 7 is used for completing the control and signal acquisition of the air path isolation pressure adjusting mechanism 5. The realization is as follows: the gas circuit of the first interface and the second interface can be cut off, the gas circuit of the density relay body and the electrical equipment is cut off during verification, the pressure value and the temperature value when the contact signal of the gas density relay body 1 acts can be detected, and the pressure value P corresponding to the 20 ℃ time can be converted20(density value), that is, the contact operating value P of the gas density relay body 1 can be detectedD20And the calibration work of the gas density relay body 1 is completed. Alternatively, the density value P at the time of the contact signal operation of the gas density relay body 1 can be directly detectedD20And the calibration work of the gas density relay body 1 is completed.
Of course, the intelligent control unit 7 can also realize: completing test data storage; and/or test data derivation; and/or the test data may be printed; and/or can be in data communication with an upper computer; and/or analog quantity and digital quantity information can be input. The intelligent control unit 7 further comprises a communication module, and the information such as test data and/or verification results is transmitted in a long distance through the communication module; when the rated pressure value output signal of gas density relay body 1, the density value at that time is gathered simultaneously to intelligence accuse unit 7, accomplishes the rated pressure value check-up of gas density relay body 1. Meanwhile, the self-checking work among the gas density relay body 1, the pressure sensor 2 and the temperature sensor 3 can be completed through the test of the rated pressure value of the gas density relay body 1, and the maintenance-free operation is realized.
Electrical equipment including SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmentally friendly gas electrical equipment, or other insulated gas electrical equipment. Specifically, the electrical equipment includes GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas insulated cabinets, ring main units, and the like.
The gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the gas path isolation pressure adjusting mechanism 5, the online checking contact signal sampling unit 6, the intelligent control unit 7 or/and the multi-way connector can be flexibly arranged as required. For example, the gas density relay body 1, the pressure sensor 2, and the temperature sensor 3 may be provided together; or the pressure sensor 2 and the air passage blocking pressure adjusting mechanism 5 may be provided together. In short, the arrangement between them can be flexibly arranged and combined. The sealed cavity 501 may be hollow or partially hollow, and its shape is matched with the partition 502, and is used in cooperation with the partition 502, so that the change of gas pressure can be adjusted.
The working principle of a gas density relay or a gas density monitoring device with an online self-checking function is as follows: the intelligent control unit 7 monitors the gas pressure and temperature of the electrical equipment according to the pressure sensor 2 and the temperature sensor 3 to obtain a corresponding 20 ℃ pressure value P20(i.e., gas density values, i.e., on-line monitoring of gas density values). When the gas density relay body 1 needs to be checked, if the gas density value P is detected at the moment20Not less than set safety check density value PS(ii) a The gas density relay (or the density monitoring device) sends an instruction, namely, the intelligent control unit 7 drives the driving part 505 of the gas path partition pressure adjusting mechanism 5, the driving part 505 pushes the connecting piece 504 to move, so that the partition piece 502 and the partition sealing piece 503 move towards the first interface 506 and the second interface 507, as shown in fig. 2 and 3, and in the movement, the control loop of the online checking contact signal sampling unit 6 for cutting off the contact signal of the gas density relay is completed through the contact signal interlocking piece 5K, and gas is enabled to be supplied to the gas density relayThe contact of the density relay body 1 is connected to the intelligent control unit 7. Because the gas density value P of the gas density relay is already carried out before the calibration is started20Not less than set safety check density value PSThe gas of the electrical equipment is in a safe operation range, and the gas leakage is a slow process and is safe during verification. With the movement of the partition member 502 and the partition sealing member 503, the first interface 506 and the second interface 507 are isolated from each other by the isolation action of the partition member 502 and the partition sealing member 503. That is, the partition member 502 and the partition sealing member 503 of the air path partition pressure adjusting mechanism 5 move toward the first interface 506 and the second interface 507 under the action of the driving component 505, after the partition member 502 passes over the first interface 506, the partition member 502 partitions the air path connection between the first interface 506 and the second interface 507, and moves toward the second interface 507 along with the partition member 502, the volume of the seal cavity 501 changes, the pressure of the gas density relay body 1 can be adjusted, the gas pressure of the gas density relay body is slowly reduced, the gas density relay body 1 is subjected to contact action, the contact action is transmitted to the intelligent control unit 7 through the online checking contact signal sampling unit 6, the intelligent control unit 7 acquires the pressure value P and the temperature value T of the pressure sensor 2 and the temperature sensor 3 according to the contact action, and then the gas density value P is obtained through calculation20Or directly obtaining the gas density value P20Detecting the contact signal operating value P of the gas density relay body 1D20And finishing the checking work of the contact signal action value of the gas density relay. Namely, the intelligent control unit 7 converts the pressure value P corresponding to 20 ℃ according to the gas pressure-temperature relation characteristic20(density value), the contact point action value P of the gas density relay body 1 can be detectedD20Treat that the alarm of gas density relay body 1 and/or the whole backs that detect of contact action value of blocking signal, 7 drive gas circuit of unit 5 are cut off pressure adjustment mechanism 5 are controlled to the rethread intelligence, cut off the motion of piece 502 toward first interface 506 direction, and seal chamber 501's volume changes, can adjust gas density relay body 1's pressure makes its gas pressure slowly rise for gas density relay body 1 takes place the contact and resets, and the contact is compoundThe position is transmitted to an intelligent control unit 7 through an online checking contact signal sampling unit 6, and the intelligent control unit 7 obtains a gas density value P according to a pressure value P and a temperature value T when the contact is reset20Or directly obtaining the gas density value P20Detecting the contact signal return value P of the gas density relayF20Completing the contact signal return value P of the gas density relayF20The verification work of (2). The verification can be repeated for a plurality of times (for example, 2 to 3 times) and then the average value thereof is calculated, thus completing the verification work of the gas density relay body 1.
After all contact signal check-up work is accomplished, unit 7 control gas circuit cuts off pressure adjustment mechanism 5 is controlled to intelligence, the disconnected piece 502 of gas circuit cut off pressure adjustment mechanism 5 moves under drive unit 505's effect, make the gas circuit of the first interface 506 of gas circuit cut off pressure adjustment mechanism 5 and second interface 507 communicate each other (as shown in fig. 1), and along with the motion of contact signal interlock spare 5K, adjust on-line check-up contact signal sampling unit 6 to operating condition, the control circuit of the contact signal of gas density relay body 1 resumes operation normal operating condition. As shown in fig. 1: at this time, the gas paths of the first interface 506 and the second interface 507 of the gas path blocking pressure adjusting mechanism 5 are communicated with each other, that is, the gas density relay body 1 is communicated with the electrical equipment 8 on the gas path, and the gas density relay body 1 (or the gas density monitoring device) normally monitors the gas density of the gas chamber of the electrical equipment and can monitor the gas density of the electrical equipment on line. That is, the density monitoring circuit of the gas density relay body 1 works normally, and the gas density of the electrical equipment 8 is monitored safely by the gas density relay body 1, so that the electrical equipment 8 works safely and reliably. Therefore, the online checking of the gas density relay body 1 is conveniently completed, and the safe operation of the electrical equipment 8 cannot be influenced when the gas density relay body 1 is checked online.
After the gas density relay body 1 completes the checking work, the gas density relay or the gas density monitoring device judges and can inform the detection result, and the mode is flexible. Specifically, the following steps can be performed: 1) the gas density relay may be annunciated locally, such as by indicator lights, digital or liquid crystal displays, etc.; 2) or the gas density relay can upload the data in an online remote transmission communication mode, for example, the data can be uploaded to a background of an online monitoring system; 3) or uploading the data to a specific terminal through wireless uploading, for example, a mobile phone can be uploaded wirelessly; 4) or uploaded by another route; 5) or the abnormal result is uploaded through an alarm signal line or a special signal line; 6) uploading alone or in combination with other signals. In a word, after the gas density relay completes the online check work of the gas density relay body 1, if an abnormality occurs, an alarm can be automatically sent out, and the alarm can be uploaded to a remote end or can be sent to a designated receiver, for example, a mobile phone. Or, after the gas density relay or the gas density monitoring device completes the calibration work of the gas density relay body 1, if there is an abnormality, the intelligent control unit 7 can upload the alarm contact signal of the gas density relay body 1 to the remote end (a monitoring room, a background monitoring platform, etc.), and can also display the notice on site. The simple gas density relay is used for on-line calibration, and the result of abnormal calibration can be uploaded through an alarm signal line. The alarm signal can be uploaded according to a certain rule, for example, when the alarm signal is abnormal, a contact is connected in parallel with an alarm signal contact and is regularly closed and opened, and the condition can be obtained through analysis; or through a separate verification signal line. The intelligent mobile phone can be uploaded in good state or in problem, or can be uploaded through remote density on-line monitoring, or can upload a verification result through a single verification signal line, or can be uploaded through on-site display, on-site alarm or wireless uploading and can be uploaded through the internet with the intelligent mobile phone. The communication mode is wired or wireless, and the wired communication mode CAN be industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carrier and the like; the wireless communication mode can be 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar, a 5G/NB-IOT communication module with a built-in sensor (such as NB-IOT) and the like. In a word, the reliable performance of the gas density relay can be fully ensured in multiple modes and various combinations.
The gas density relay has a safety protection function, and particularly, when the gas density relay is lower than a set value, gas is generatedThe density relay or the gas density monitoring device automatically sends out the notification signal without carrying out online verification on the density relay body 1. For example, when the gas density value of the plant is less than the set value PSIt is not verified. For example: only when the gas density value of the equipment is more than or equal to (the alarm pressure value is plus 0.02MPa), the online verification can be carried out.
The gas density relay or the gas density monitoring device can perform online verification according to set time, and can also perform online verification according to set temperature (such as extreme high temperature, extreme low temperature, normal temperature, 20 ℃ and the like). When the environment temperature of high temperature, low temperature, normal temperature and 20 ℃ is checked on line, the error judgment requirements are different, for example, when the environment temperature of 20 ℃ is checked, the accuracy requirement of the gas density relay can be 1.0 level or 1.6 level, and when the environment temperature is high, the accuracy requirement can be 2.5 level. The method can be implemented according to the relevant standard according to the temperature requirement. For example, according to 4.8 temperature compensation performance regulations in DL/T259 sulfur hexafluoride gas density relay calibration code, the accuracy requirement corresponding to each temperature value is met.
The gas density relay or the gas density monitoring device can compare the error performance of the gas density relay at different temperatures and different time periods according to the density. Namely, the performances of the gas density relay and the electrical equipment are judged by comparing the temperature ranges in different periods. The comparison of each period with history and the comparison of the history and the present are carried out.
The gas density relay can be repeatedly verified for multiple times (for example, 2-3 times), and the average value of the gas density relay is calculated according to the verification result of each time. When necessary, the gas density relay can be checked on line at any time.
The gas density relay or the gas density monitoring device has the functions of pressure and temperature measurement and software conversion. On the premise of not influencing the safe operation of the electrical equipment, the alarm and/or locking contact action value and/or return value of the gas density relay body 1 can be detected on line. Of course, the return value of the alarm and/or latch contact signal may also be left untested as required. Meanwhile, the gas density relay (or the gas density monitoring device) can also monitor the gas density value, and/or the pressure value, and/or the temperature value of the electrical equipment on line, and upload the value to the target equipment to realize on-line monitoring.
Example two:
as shown in fig. 4, a second gas density relay or gas density monitoring device with an online self-calibration function according to an embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a valve 4, a gas path isolation pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7, an electrical device 8 and a multi-way connector 9. Pressure sensor 2, temperature sensor 3, online check-up contact signal sampling unit 6 and intelligent control unit 7 set up on gas density relay body 1.
Fig. 4 is a schematic diagram of an operating state of a gas density relay or a gas density monitoring device with an online self-checking function. Specifically, the air path blocking pressure adjusting mechanism 5 includes a sealed cavity 501, a blocking member 502, a blocking sealing member 503, a connecting member 504, a driving member 505, a first interface 506, a second interface 507, a third interface 511, a connecting member sealing member 510, and a cavity (or a housing) 512. One end of the valve 4 is connected to the third port 511, and the other end of the valve 4 is connected to the multi-way joint 9. The first interface 506 is provided at a position between the second interface 507 and the third interface 511. Connector 504 is sealed from sealed cavity 501 by connector seal 510; wherein the partition 502 is arranged in the sealed cavity 501, and the partition 502 is connected with the driving part 505 through the connecting part 504; the connector 504, drive member 505, connector seal 510 are sealed within a cavity (or housing) 512. The cavity (or housing) 512 and the sealed cavity 501 have good sealing performance, that is, the cavity (or housing) 512 ensures that the air path blocking pressure adjusting mechanism 5 has good sealing performance. The gas density relay body 1 is arranged on the gas path partition pressure adjusting mechanism 5; the air path partition pressure adjusting mechanism 5 is arranged on the multi-way joint 9; the pressure sensor 2 and the temperature sensor 3 are arranged on the gas density relay body 1, and the pressure sensor 2 is communicated with the gas density relay body 1 on a gas path. In the working state, the gas path blocking pressure adjusting mechanism 5 is communicated with the gas density relay body 1; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2, the temperature sensor 3, the valve 4 and the air circuit partition pressure adjusting mechanism 5 are respectively connected with the intelligent control unit 7. The multi-way joint 9 is also communicated with an air supply interface.
The valve 4 can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic hydraulic, electrohydraulic, pneumatic hydraulic, spur gear and bevel gear drive; the valve can be operated according to the preset requirement under the action of pressure, temperature or other forms of sensing signals, or can be simply opened or closed without depending on the sensing signals, and the valve can make the opening and closing piece perform lifting, sliding, swinging or rotating motion by depending on a driving or automatic mechanism, so that the size of the flow passage area of the valve can be changed to realize the control function of the valve. The valve 4 can be driven by automatic valves, power-driven valves and manual valves. And the automatic valve may include: electromagnetic drive, electromagnetic-hydraulic drive, electro-hydraulic drive, turbine drive, spur gear drive, bevel gear drive, pneumatic drive, hydraulic drive, gas-hydraulic drive, electric motor (motor) drive. The valve may be automatic or manual, semi-automatic. The verification process can be automatically completed or semi-automatically completed through manual cooperation. The valve 4 is connected directly or indirectly, integrally or separately, to the electrical equipment through a self-sealing valve, a manual valve, or a non-detachable valve. The valve 4 may be normally open or normally closed, or may be unidirectional or bidirectional, as desired. In short, the air passage is opened or closed through the electric control valve 4. The electrically controlled valve 4 may adopt the following modes: electromagnetic valve, electric control ball valve, electric control proportional valve, etc.
What is different from the first embodiment is that the air path blocking pressure adjusting mechanism 5 of the present embodiment mainly seals the connecting piece 504 with the sealing cavity 501 through the connecting piece sealing piece 510; the connector 504, drive member 505, connector seal 510 are sealed within a cavity (or housing) 512. The cavity (or housing) 512 and the sealed cavity 501 have good sealing performance, that is, the cavity (or housing) 512 ensures that the air path blocking pressure adjusting mechanism 5 has good sealing performance. The biggest differences are: the embodiment also comprises a valve 4, and overpressure alarming is completed through the valve 4And (5) verifying the density relay body with the contact function. As in the first embodiment, after the alarm and/or latch contact actuation value and/or return value of the gas density relay body 1 is detected online, the blocking member 502 is adjusted (or automatically set) to a suitable position, for example, close to the second interface 507, and then the valve 4 is controlled by the intelligent control unit 7, that is, the valve 4 is opened by the intelligent control unit 7, at this time, the gas of the electrical device 8 enters the gas density relay body 1, so that the pressure of the gas density relay body 1 is raised to a set pressure value or directly raised to the gas pressure value of the electrical device 8, and then the valve 4 is closed by the intelligent control unit 7. Then, 7 drive gas circuit wall pressure adjustment mechanism 5 are controlled to rethread intelligence to the unit, cut off piece 502 and move toward third interface 511 direction, and the volume of seal chamber 501 (cut off piece 502 right side part in fig. 4) changes, can adjust gas density relay body 1's pressure makes its gas pressure slowly rise for the superpressure warning contact of gas density relay body 1 takes place the action, and the signal that the superpressure warning contact took place the action transmits to intelligence through online check-up contact signal sampling unit 6 and controls unit 7, and intelligence is controlled unit 7 and is obtained gas density value P according to pressure value P, temperature value T when the superpressure warning contact takes place the action pressure value P, temperature value T and is controlled unit 7 and is controlled20Or directly obtaining the gas density value P20Detecting the contact signal value P of the overpressure alarm contact of the gas density relayC20Completing the overpressure alarm contact signal value P of the gas density relay body 1C20The verification work of (2). The gas path partition pressure adjusting mechanism 5 enables the driving component 505 to push the partition member 502 to move according to the control of the intelligent control unit 7, so that the volume of the sealed cavity 501 changes, the pressure is further reduced, and the contact signal value P of the overpressure alarm contact of the gas density relay which is reset is detectedCF20Completing the overpressure alarm contact signal return value P of the gas density relay body 1CF20The verification work of (2).
Example three:
as shown in fig. 5, a gas density relay or a gas density monitoring device with an online self-calibration function according to a third embodiment of the present invention includes: gas density relay body 1, pressure sensor 2, temperature sensor 3, gas circuit cut off pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7, electrical equipment 8, lead to joint 9 and tonifying qi and connect 10 more. The air path blocking pressure adjusting mechanism 5 comprises a sealed cavity 501, a blocking piece 502, a blocking sealing piece 503, a connecting piece 504, driving parts 513 and 514, a first interface 506 and a second interface 507. The gas density relay body 1 is arranged on the gas path partition pressure adjusting mechanism 5; the pressure sensor 2, the temperature sensor 3, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The gas path partition pressure adjusting mechanism 5 is arranged on the multi-way connector 9, and the pressure sensor 2 is communicated with the gas density relay body 1 on the gas path; the air supply joint 10 is arranged on the multi-way joint 9. The pressure sensor 2 and the temperature sensor 3 are connected with the intelligent control unit 7; the air path partition pressure adjusting mechanism 5 is connected with the intelligent control unit 7.
The biggest difference from the first embodiment is that the driving part of the air path blocking pressure adjusting mechanism 5 of the present embodiment is composed of a power driving part 513 and a driven part 514, and the blocking part 502, the connecting part 504 and the driven part 514 are arranged inside the sealed cavity 501. The spacer 502 is connected to the driven member 514 by a connector 504. According to the control of the intelligent control unit 7, the power driving part 513 drives the driven part 514 to move, so that the partition part 502 moves, the volume of the sealed cavity 501 changes, and the pressure rise and fall are completed. The power driving component 513 is disposed outside the sealed cavity 501, the driven component 514 is disposed inside the sealed cavity 501, and the power driving component 513 uses electromagnetic force to drive the driven component 514 to move, that is, the driven component 514 and the partition component 502 are moved by magnetic force between the driven component 514 and the power driving component 513. This embodiment may be implemented in conjunction with a magnetically coupled rodless cylinder.
Example four:
as shown in fig. 6, a gas density relay or a gas density monitoring device with an online self-calibration function according to a fourth embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a gas circuit partition pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and electrical equipment 8. The pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the gas density relay body 1; the gas density relay body 1 is arranged on the gas path isolation pressure adjusting mechanism 5. Further, the air path blocking pressure adjusting mechanism 5 includes a sealed cavity 501, a blocking member 502, a blocking sealing member 503, a connecting member 504, a driving member 505, a first interface 506, a second interface 507, a sealing member coupling member 508, and a cavity (or a housing) 512; the seal coupler 508 may be constructed of a bellows. The connector 504, drive component 505, and seal coupling 508 are sealingly disposed within a chamber (or housing) 512. The second interface 507 of the air path blocking pressure adjusting mechanism 5 may be directly or indirectly connected with the electrical device 8 through a joint.
The difference from the first embodiment is that: the connecting member 504, the driving member 505 and the sealing member coupling 508 of the present embodiment are hermetically disposed inside the cavity (or housing) 512, so as to further improve the sealing performance and ensure the safe operation of the power grid. In addition, the partition piece can be directly connected with the driving part through the sealing piece connecting piece; or the separating piece and the connecting piece are integrally designed and directly connected with the driving part.
Fig. 7 is a schematic structural view of a gas density relay body 1 according to a preferred embodiment of the present application. As shown in fig. 7, a gas density relay body 1 includes: the temperature-compensating device comprises a shell 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensating element 104, a plurality of signal generators 109, a movement 105, a pointer 106 and a dial 107 which are arranged in the shell 101. One end of the pressure detector 103 is fixed on the base 102 and is communicated with the base, the other end of the pressure detector 103 is connected with one end of the temperature compensation element 104 through the end seat 108, the other end of the temperature compensation element 104 is provided with a beam, and the beam is provided with an adjusting piece which pushes the signal generator 109 and enables a contact of the signal generator 109 to be switched on or off. The movement 105 is fixed on the base 102; the other end of the temperature compensation element 104 is also connected with the movement 105 through a connecting rod or directly connected with the movement 105; the pointer 106 is mounted on the core 105 and is arranged in front of the dial 107, and the pointer 106 displays the gas density value in combination with the dial 107. The gas density relay body 1 may further include a digital device or a liquid crystal device having an indication display. The signal generator 109 comprises a microswitch or a magnetic auxiliary electric contact, and the gas density relay body 1 outputs a contact signal through the signal generator 109; the pressure detector 103 comprises a bourdon tube or a bellows; the temperature compensation element 104 is a temperature compensation sheet or a gas enclosed in a housing. The gas density relay body 1 of the present embodiment may further include: 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 gas density relay body 1 of the present embodiment, the varying pressure and temperature are corrected based on the pressure detector 103 and by the temperature compensation element 104 to reflect the variation in the sulfur hexafluoride gas density. Under the pressure of the measured medium sulfur hexafluoride (SF6), due to the action of the temperature compensation element 104, when the density value of the sulfur hexafluoride gas changes, the pressure value of the sulfur hexafluoride gas also changes correspondingly, so that the end of the pressure detector 103 is forced to generate corresponding elastic deformation displacement, the displacement is transmitted to the movement 105 by means of the temperature compensation element 104, the movement 105 is transmitted to the pointer 106, and the density value of the sulfur hexafluoride gas to be measured is indicated on the dial 107. The signal generator 109 serves as an output alarm lockout contact. Therefore, the gas density relay body 1 can display the density value of the sulfur hexafluoride gas. If the sulfur hexafluoride gas density value is reduced due to air leakage, the pressure detector 103 generates corresponding downward displacement and transmits the downward displacement to the movement 105 through the temperature compensation element 104, the movement 105 transmits the downward displacement to the pointer 106, the pointer 106 moves towards the direction with small indication value, and the air leakage degree is specifically displayed on the dial 107; meanwhile, the pressure detector 103 drives the beam to move downwards through the temperature compensation element 104, the adjusting piece on the beam gradually leaves the signal generator 109, and when the adjusting piece on the beam reaches a certain degree, the contact of the signal generator 109 is connected to send out a corresponding contact signal (alarm or lock), so that the sulfur hexafluoride gas density in equipment such as an electrical switch and the like is monitored and controlled, and the electrical equipment can work safely.
If the gas density value is increased, namely the pressure value of sulfur hexafluoride gas in the sealed gas chamber is greater than the set pressure value of the sulfur hexafluoride gas, the pressure value is correspondingly increased, the tail end of the pressure detector 103 and the temperature compensation element 104 generate corresponding upward displacement, the temperature compensation element 104 enables the cross beam to also move upward, the adjusting piece on the cross beam moves upward and pushes the contact of the signal generator 109 to be disconnected, and the contact signal (alarm or lock) is released.
Example five:
as shown in fig. 8, a gas density relay or a gas density monitoring device with an online self-calibration function according to a fifth embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a gas circuit partition pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and electrical equipment 8. The pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the gas density relay body 1; the gas density relay body 1 is arranged on the gas path isolation pressure adjusting mechanism 5. Further, the gas circuit partition pressure adjusting mechanism 5 comprises a sealed cavity 501, a partition member 502, a partition sealing member 503, a connecting member 504, a driving component composed of a heating device 516 and a bimetallic strip 515 (i.e. an electric heating thrust generating mechanism), a first interface 506, a second interface 507, a connecting member 517, a sliding member 518, a heat insulation member 519, and a cavity (or a housing); the driving part consisting of the connecting member 504, the heating device 516 and the bimetal 515, the connecting member 517 and the sliding member 518 are hermetically disposed inside the cavity (or housing). The second interface 507 of the air path blocking pressure adjusting mechanism 5 may be directly or indirectly connected with the electrical device 8 through a joint.
The difference from the first embodiment is that: the driving part consisting of the connecting member 504, the heating device 516 and the bimetallic strip 515, the connecting member 517 and the sliding member 518 of the present embodiment are hermetically disposed inside the cavity (or the housing), so as to further improve the sealing performance and ensure the safe operation of the power grid. The driving part of this case is composed of a heating device 516 and a bimetal 515, when the heating device 516 is heated after being electrified, the bimetal 515 is expanded, the connecting piece 517 and the sliding piece 518 are pushed to move, the connecting piece 504 is further pushed to move, the partition piece 502 is further pushed to move, the air passage is partitioned, and the pressure is adjusted.
Example six:
as shown in fig. 9, a gas density relay or a gas density monitoring device with an online self-calibration function according to a sixth embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a pressure sensor 2, a temperature sensor 3, a gas circuit partition pressure adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7 and electrical equipment 8. The pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the gas density relay body 1; the gas density relay body 1 is arranged on the gas path blocking pressure adjusting mechanism 5. Further, the air path blocking pressure adjusting mechanism 5 includes a seal cavity 501, a blocking member 502, a blocking sealing member 503A, a blocking sealing member 503B, a connecting member 504A, a connecting member 504B, a driving member 505, a first interface 506, a second interface 507, a capillary 520, and a cavity (or a housing) 512. The second interface 507 of the air path blocking pressure adjusting mechanism 5 may be directly or indirectly connected with the electrical device 8 through a joint. Wherein, the sealed cavity 501 is composed of a corrugated pipe 508, a partition piece 502 and a plugging piece 521; in the gas path, the gas density relay body 1 communicates with the first port 506 of the gas path blocking pressure adjusting mechanism 5 through a spiral capillary 520. The sealed housing 501 is further provided with a fixed point (not shown) whose position is not changeable, such as a point where the wall of the sealed housing 501 is fixedly connected to the outer housing 512, and the driving member 505 can be mounted or connected to the fixed point to prevent the position of the driving member 505 from changing.
The difference from the first embodiment is that: when the intelligent control unit 7 works, the intelligent control unit 7 controls the driving component 505 to enable the connecting piece 504B to move downwards, further pushes the partition piece 502 to move downwards, closes the air channel of the second interface 507, and partitions the gas density relay body 1 and the electrical equipment 8 on the air channel; and simultaneously or subsequently, the connecting piece 504A moves upwards to push the blocking piece 521 to move upwards, so that the corrugated pipe 508 expands, the volume of the sealing cavity 501 changes, the pressure drop is adjusted, or the pressure rises, and the verification of the density relay body 1 is completed. In this case, the partition member 502 may be moved downward to close the air passage of the second port 507, and then the connecting member 504A is moved upward to push the plugging member 521 to move upward, so that the bellows 508 is expanded to change the volume of the sealing cavity 501, thereby adjusting the pressure to decrease or increase; or, the partition 502 may be moved downward to close the air passage of the second port 507, and the connection 504A is moved upward to push the plugging member 521 to move upward, so that the bellows 508 is expanded to change the volume of the sealed cavity 501, thereby adjusting the pressure drop or rise. The partition member 502 can be moved downwards, the blocking member 521 can be moved upwards, the partition member 502 is moved downwards, the air passage for closing the second port 507 is fixed, and the air passage for closing the second port 507 is kept closed; the plugging member 521 can continue to move upward to expand the bellows 508, so that the volume of the sealed cavity 501 changes, thereby adjusting the pressure drop or rise. The driving member 505 may be disposed inside or outside the sealed housing 501.
Example seven:
as shown in fig. 10, a gas density relay or a gas density monitoring device with an online self-calibration function according to a seventh embodiment of the present invention includes: the gas density relay comprises a gas density relay body 1, a first pressure sensor 21, a second pressure sensor 22, a first temperature sensor 31, a second temperature sensor 32, a gas path isolation pressure adjusting mechanism 5, an online checking joint signal sampling unit 6, an intelligent control unit 7, a multi-way joint 9, an air supply interface 10 and a self-sealing valve 11. One end of the self-sealing valve 11 is connected to the electrical equipment 8 in a sealing manner, and the other end of the self-sealing valve 11 is connected with the multi-way connector 9. The second pressure sensor 21, the second temperature sensor 22, the air path partition pressure adjusting mechanism 5 and the air supply interface 10 are arranged on the multi-way joint 9; the first pressure sensor 21 and the first temperature sensor 31 are provided in the gas path shutoff pressure adjusting mechanism 5. The first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31 and the second temperature sensor 32 are respectively connected with the intelligent control unit 7. The first pressure sensor 21, the second pressure sensor 22 and the gas density relay body 1 are communicated with the gas path partition pressure adjusting mechanism 5 on the gas path; the air path partition pressure adjusting mechanism 5 is connected with the intelligent control unit 7.
Different from the first embodiment, the pressure sensors are two, namely a first pressure sensor and a second pressure sensor; the temperature sensors are two, namely a first temperature sensor and a second temperature sensor. The present embodiment provides a plurality of pressure sensors and temperature sensors for the purpose of: the pressure values monitored by the first pressure sensor and the second pressure sensor can be compared and verified mutually; the temperature values monitored by the first temperature sensor and the second temperature sensor can be compared and verified with each other; the density value P1 obtained by monitoring the first pressure sensor and the first temperature sensor20A density value P2 monitored with the second pressure sensor and the second temperature sensor20Comparing and checking each other; even the density value Pe of the rated value of the gas density relay body 1 can be checked and obtained on line20And comparing and checking each other. The reliability of the density relay or the density monitoring device is further ensured, automatic monitoring and comparison are carried out, and maintenance-free is achieved.
Meanwhile, the system also comprises a micro-water sensor for monitoring the micro-water content of the electrical equipment and a decomposition product sensor for monitoring the decomposition product content.
In addition, the technical product of the invention also has a safety protection function, and specifically comprises the following steps: 1) when the density value obtained by monitoring the first pressure sensor and the first temperature sensor or the second pressure sensor and the second temperature sensor is lower than a set value, the gas density relay automatically does not check the gas density relay body any more and sends out an announcement signal. For example, when the gas density value of the plant is less than the set value, it is not verified. The check can only be carried out when the gas density value of the equipment is not less than (blocking pressure +0.02 MPa). The alarm of the contact point has a state indication. 2) Or during verification, the valve is closed at the moment, and when the density value obtained by monitoring the second pressure sensor and the second temperature sensor is lower than a set value, the gas density relay automatically does not relay the gas density any moreThe electric appliance body is checked and simultaneously sends out an informing signal (air leakage). For example, when the gas density value of the plant is less than the set value (lock pressure +0.02MPa), it is not verified. The set value can be set arbitrarily as required. Meanwhile, the gas density relay is also provided with a plurality of pressure sensors and temperature sensors for mutual verification, and the sensors and the gas density relay are mutually verified, so that the gas density relay is ensured to normally work. Comparing the pressure values obtained by monitoring the first pressure sensor and the second pressure sensor, and checking each other; comparing the temperature values obtained by monitoring the first temperature sensor and the second temperature sensor, and checking each other; the density value P1 obtained by monitoring the first pressure sensor and the first temperature sensor20A density value P2 monitored with the second pressure sensor and the second temperature sensor20Comparing and checking each other; even the density value Pe of the rated value of the gas density relay body can be verified20And comparing and checking each other.
In summary, the present invention provides a gas density relay with an online self-calibration function and a calibration method thereof, which comprises a gas path (capable of passing through a pipeline) connection part, a pressure adjustment part, a signal measurement control part, etc., and the main function is to perform online calibration measurement on the contact value (pressure value during alarm/lockout operation) of a gas density relay body, and automatically convert the contact value into a corresponding pressure value at 20 ℃, thereby realizing performance detection on the contact value (alarm and lockout) of the gas density relay body online. The mounting positions of the gas density relay body, the pressure sensor, the temperature sensor, the gas path partition pressure adjusting mechanism, the online checking contact signal sampling unit and the intelligent control unit can be flexibly combined. For example: the gas density relay body, the pressure sensor, the temperature sensor, the online check contact signal sampling unit and the intelligent control unit can be combined together, integrally designed and also can be designed in a split mode; can be arranged on the shell or on the multi-way joint, and can also be connected together through a connecting pipe. The valve can be directly connected with electrical equipment, or can be connected with the electrical equipment through a self-sealing valve or an air pipe. The pressure sensor, the temperature sensor, the online check contact signal sampling unit and the intelligent control unit can be combined together and are designed integrally; the pressure sensor and the temperature sensor can be combined together and are designed integrally; the online check joint signal sampling unit and the intelligent control unit can be combined together to realize integrated design. In short, the structure is not limited.
A gas density relay with on-line self-checking function is generally designed into an integral structure by its constituent elements; the gas density monitoring device generally refers to a device whose components are designed into a split structure and flexibly assembled.
When the contact of the density relay is verified at the ambient temperature of high temperature, low temperature, normal temperature and 20 ℃, the requirement for error judgment of the density relay can be different, and the method can be implemented according to the temperature requirement and the related standard; the error performance of the density relay can be compared in different time periods at different temperatures according to the density. I.e., comparisons over the same temperature range at different times, a determination is made as to the performance of the density relay. The comparison of each period with history and the comparison of the history and the present are carried out. The density relay body can also be subjected to physical examination. When necessary, the density relay contact signals can be checked at any time; the density value of the monitored electric equipment is judged whether to be normal or not by the gas density relay body. The density value of the electrical equipment, the gas density relay body, the pressure sensor and the temperature sensor can be judged, analyzed and compared normally and abnormally, and further the states of the electrical equipment, such as gas density monitoring, the gas density relay body and the like, can be judged, compared and analyzed; the contact signal state of the gas density relay is monitored, and the state is remotely transmitted. The contact signal state of the gas density relay can be known in the background: the system is opened or closed, so that one more layer of monitoring is provided, and the reliability is improved; the temperature compensation performance of the gas density relay body can be detected or detected and judged; the contact resistance of the contact point of the gas density relay body can be detected or detected and judged; and the insulation performance of the gas density relay body is also detected, or detected and judged.
The anti-rust and anti-vibration device is compact and reasonable in structural arrangement, good in anti-rust and anti-vibration capacity of each part, firm in installation and reliable in use. The connection, the dismouting of each pipeline of gas density relay are easily operated, and equipment and part are convenient to be maintained. The gas density relay calibration device can complete the calibration work of the gas density relay without a maintainer going to the site, greatly improves the reliability of a power grid, improves the efficiency and reduces the cost.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.

Claims (30)

1. A gas density relay with an online self-checking function is characterized by comprising: the gas density relay comprises a gas density relay body, a gas density detection sensor, a gas path blocking pressure adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit;
the gas density detection sensor is communicated with the gas density relay body;
the gas path of the gas density relay body is connected with a first interface of the gas path partition pressure adjusting mechanism;
the gas path partition pressure adjusting mechanism is also provided with a second interface communicated with the electrical equipment, and is configured to partition a gas path between the first interface and the second interface and adjust the pressure rise and fall of the gas density relay body to enable the gas density relay body to generate contact signal action;
the online check contact signal sampling unit is directly or indirectly connected with the gas density relay body and is configured to sample a contact signal of the gas density relay body;
the intelligent control unit is respectively connected with the gas density detection sensor, the gas circuit partition pressure adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the gas circuit partition pressure adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay body;
wherein the contact signal comprises an alarm, and/or a latch.
2. A gas density monitoring device with an online self-checking function is characterized by comprising: the gas density relay comprises a gas density relay body, a gas density detection sensor, a gas path blocking pressure adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit;
the gas density detection sensor is communicated with the gas density relay body;
the gas path of the gas density relay body is connected with a first interface of the gas path partition pressure adjusting mechanism;
the gas path partition pressure adjusting mechanism is also provided with a second interface communicated with the electrical equipment, and is configured to partition a gas path between the first interface and the second interface and adjust the pressure rise and fall of the gas density relay body to enable the gas density relay body to generate contact signal action;
the online check contact signal sampling unit is directly or indirectly connected with the gas density relay body and is configured to sample a contact signal of the gas density relay body;
the intelligent control unit is respectively connected with the gas density detection sensor, the gas circuit partition pressure adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the gas circuit partition pressure adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay body;
wherein the contact signal comprises an alarm, and/or a latch.
3. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density detection sensor, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas path partition pressure adjusting mechanism; the gas circuit partition pressure adjusting mechanism is arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor, the gas circuit partition pressure adjusting mechanism, the online check contact signal sampling unit and the intelligent control unit are arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor is arranged on the gas density relay body; alternatively, the first and second electrodes may be,
the gas density detection sensor is arranged on the gas path partition pressure adjusting mechanism; alternatively, the first and second electrodes may be,
the gas density relay body is arranged on the gas path partition pressure adjusting mechanism; alternatively, the first and second electrodes may be,
the online checking contact signal sampling unit and the intelligent control unit are arranged on the gas circuit partition pressure adjusting mechanism.
4. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density relay body and the gas density detection sensor are of an integrated structure; or the gas density relay body and the gas density detection sensor are a remote transmission type gas density relay with an integrated structure.
5. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density detection sensor is of an integrated structure; or the gas density detection sensor is a gas density transmitter with an integrated structure; preferably, online check joint signal sampling unit, the intelligence accuse unit sets up on the gas density transmitter.
6. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the online check contact signal sampling unit and the intelligent control unit are arranged together; preferably, the online check joint signal sampling unit and the intelligent control unit are sealed in a cavity or a shell.
7. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; alternatively, the first and second electrodes may be,
a gas density transmitter consisting of a pressure sensor and a temperature sensor is adopted; alternatively, the first and second electrodes may be,
a density detection sensor adopting quartz tuning fork technology.
8. The gas density relay or gas density monitoring device of claim 7, wherein: the pressure sensor is arranged on the gas path of the gas density relay body or the gas path isolation pressure adjusting mechanism;
the temperature sensor is arranged on or outside the gas path of the gas density relay body, or in the gas density relay body, or outside the gas density relay body.
9. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit acquires the gas density value acquired by the gas density detection sensor; or, the intelligence accuse unit acquires the pressure value and the temperature value that gas density detection sensor gathered accomplish gas density relay or gas density monitoring devices are to the on-line monitoring of the gas density of the electrical equipment who monitors.
10. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit acquires a gas density value acquired by the gas density detection sensor when the gas density relay body generates contact signal action or switching, and completes online verification of the gas density relay or the gas density monitoring device; alternatively, the first and second electrodes may be,
the intelligence accuse unit acquires when the gas density relay body takes place contact signal action or switches the pressure value and the temperature value that gas density detection sensor gathered to according to the pressure value that gas pressure-temperature characteristic conversion becomes corresponding 20 ℃, gas density value promptly, accomplish gas density relay or gas density monitoring devices's online check-up.
11. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density relay body is provided with a comparison density value output signal which is connected with the intelligent control unit; alternatively, the first and second electrodes may be,
the gas density relay body has the pressure value output signal of comparing, should compare pressure value output signal with the intelligence is controlled the unit and is connected.
12. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas circuit partition pressure adjusting mechanism comprises a sealed cavity and a partition piece positioned in the sealed cavity, and a first interface and a second interface are both arranged on the wall of the sealed cavity and are communicated with the inner space of the sealed cavity; the isolating piece is configured to isolate an air path between the first interface and the second interface and is used for adjusting the pressure rise and the pressure fall of the gas density relay body, so that the gas density relay body generates contact signal action.
13. The gas density relay or gas density monitoring device of claim 12, wherein: the gas circuit partition pressure adjusting mechanism also comprises a connecting piece and a driving part, and the partition piece is connected with the driving part through the connecting piece; alternatively, the first and second electrodes may be,
the separating piece and the connecting piece are integrally designed and are directly connected with the driving part; alternatively, the first and second electrodes may be,
the spacer is associated with the drive member by magnetic coupling;
wherein, preferably, the driving component includes, but is not limited to, one of a magnetic force, a motor, an electric push rod motor, a stepping motor, a reciprocating mechanism, a carnot cycle mechanism, an air compressor, a deflation valve, a pressure making pump, a booster valve, an electric air pump, an electromagnetic air pump, a pneumatic element, a magnetic coupling thrust mechanism, a heating thrust generating mechanism, an electric heating thrust generating mechanism, and a chemical reaction thrust generating mechanism.
14. A gas density relay or gas density monitoring device according to claim 13, wherein: one end of the sealed cavity is provided with a fifth interface, one end of the connecting piece is connected with the partition piece, and the other end of the connecting piece penetrates out of the fifth interface and is connected to the driving part.
15. The gas density relay or gas density monitoring device of claim 14, wherein: the first interface is closer to the fifth interface than the second interface, or the first interface is farther from the fifth interface than the second interface.
16. The gas density relay or gas density monitoring device of claim 14, wherein: the gas circuit partition pressure adjusting mechanism further comprises a sealing element connecting piece, the sealing element connecting piece is arranged at a fifth interface of the sealed cavity, and the other end of the connecting piece penetrates through the sealing element connecting piece to be connected with the driving part; preferably, the seal coupling comprises, but is not limited to, one of a bellows, a balloon, a sealing ring.
17. A gas density relay or gas density monitoring device according to claim 13, wherein: the sealing cavity is a telescopic cavity, the driving part is positioned in the sealing cavity, and driving ends are arranged in two directions; the connecting piece comprises a first connecting piece and a second connecting piece which are respectively connected to the driving ends in two directions; the other end of the first connecting piece is connected with the inner wall of the sealed cavity; the other end of the second connecting piece is connected with the partition piece, the partition piece is provided with a through hole to communicate the inside of the sealed cavity with the second interface, one side of the partition piece, facing the second interface, is provided with a sealing piece, and the sealing piece is arranged around the through hole; preferably, the two driving ends face in opposite directions.
18. A gas density relay or gas density monitoring device according to claim 13, wherein: during checking, the air path cuts off the movement of the cutting part of the pressure regulating mechanism under the drive of the driving part, the cutting part cuts off the air path connection of the first interface and the second interface, the air pressure of the sealed cavity changes along with the position change of the cutting part and is used for regulating the pressure rise and fall of the gas density relay body, so that the gas density relay body generates contact signal action.
19. The gas density relay or gas density monitoring device of claim 12, wherein: the edge of the partition is in sealing contact with the inner wall of the sealing cavity; preferably, the partition comprises, but is not limited to, one of a piston, a sealing partition.
20. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the air path isolation pressure adjusting mechanism is sealed in a cavity or a shell.
21. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the online check contact signal sampling unit comprises an isolation sampling element, and the isolation sampling element is controlled by a gas density relay body, or a gas path isolation pressure adjusting mechanism, or an intelligent control unit; in a non-checking state, the online checking contact signal sampling unit is relatively isolated from the contact of the gas density relay body on a circuit through an isolation sampling element; in a checking state, the online checking contact signal sampling unit cuts off a contact signal control loop of the gas density relay body through an isolation sampling element, and connects the contact of the gas density relay body with the intelligent control unit; preferably, the isolated sampling element includes, but is not limited to, one of a travel switch, a micro switch, a button, an electric switch, a displacement switch, an electromagnetic relay, an optical coupler, and a thyristor.
22. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas circuit partition pressure adjusting mechanism is also provided with a third interface; one end of the valve is connected with a third interface of the gas path partition pressure adjusting mechanism, and the other end of the valve is directly or indirectly connected with electrical equipment; the first interface is located at a position between the second interface and the third interface.
23. The gas density relay of claim 1 or the gas density monitoring device of claim 2, further comprising: respectively with the gas density relay body with the little water sensor that the unit is connected is controlled to the intelligence, and/or respectively with the gas density relay body with the decomposition thing sensor that the unit is connected is controlled to the intelligence.
24. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density relay comprises a gas circuit isolation pressure adjusting mechanism and a temperature adjusting mechanism, wherein the gas density relay also comprises a temperature adjusting mechanism which is a temperature-adjustable adjusting mechanism and is configured to adjust the temperature rise and fall of a temperature compensation element of the gas density relay body so as to be matched with or/and combined with the gas circuit isolation pressure adjusting mechanism to enable the gas density relay body to generate contact signal action; the intelligent control unit is connected with the temperature adjusting mechanism to complete the control of the temperature adjusting mechanism.
25. A gas density relay or a gas density monitoring device according to claim 24 wherein: the temperature adjusting mechanism is a heating element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heat preservation piece, a temperature controller, a temperature detector and a temperature adjusting mechanism shell; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power adjuster and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a refrigerating element, a power regulator and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power regulator and a constant temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a controller and a temperature detector; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a heating element which is arranged near the temperature compensation element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a miniature thermostat;
the number of the heating elements is at least one, and the heating elements comprise but are not limited to one of silicon rubber heaters, resistance wires, electric heating tapes, electric heating rods, hot air blowers, infrared heating devices and semiconductors;
the temperature controller is connected with the heating element and used for controlling the heating temperature of the heating element, and the temperature controller comprises but is not limited to one of a PID controller, a controller combining PID and fuzzy control, a variable frequency controller and a PLC controller.
26. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the online calibration method comprises the following steps that at least two gas density relay bodies, at least two gas circuit partition pressure adjusting mechanisms, at least two online calibration contact signal sampling units, an intelligent control unit and a gas density detection sensor are used for completing online calibration of the gas density relay or the gas density monitoring device; alternatively, the first and second electrodes may be,
the online calibration method comprises the following steps that at least two gas density relay bodies, at least two gas circuit partition pressure adjusting mechanisms, at least two online calibration contact signal sampling units, at least two intelligent control units and a gas density detection sensor are used for completing online calibration of the gas density relay or the gas density monitoring device; alternatively, the first and second electrodes may be,
at least two gas density relay bodies, at least two gas circuit partition pressure adjusting mechanisms, at least two online check contact signal sampling units, at least two gas density detection sensors and an intelligent control unit are used for completing the online check of the gas density relay or the gas density monitoring device.
27. The gas density relay of claim 1 or the gas density monitoring device of claim 2, further comprising: the gas density relay body and the gas path blocking pressure adjusting mechanism are arranged on the multi-way joint; alternatively, the first and second electrodes may be,
the gas path partition pressure adjusting mechanism is fixed on the multi-way connector; alternatively, the first and second electrodes may be,
the gas density relay body, the gas density detection sensor and the gas path partition pressure adjusting mechanism are arranged on the multi-way connector.
28. A method for verifying a gas density relay, comprising:
in a normal working state, the gas density relay monitors the gas density value in the electrical equipment;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the gas circuit is controlled to cut off the pressure adjusting mechanism through the intelligent control unit, a cutting part of the gas circuit cutting off the pressure adjusting mechanism moves under the action of the driving part, the cutting part cuts off the gas circuit connection of the first interface and the second interface, and along with the movement of the cutting part, the volume of the sealing cavity changes, the pressure of the gas density relay body can be adjusted, the gas pressure of the gas density relay body is slowly reduced, the gas density relay body is enabled to generate contact action, the contact action is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to the pressure value and the temperature value when the contact acts, or directly obtains the gas density value, detects a contact signal action value of the gas density relay body, and the checking work of the contact signal action value of the gas density relay body is completed;
after all contact signal check-up work were accomplished, unit control gas circuit wall pressure adjustment mechanism was controlled to the intelligence, the gas circuit cuts off the wall piece of pressure adjustment mechanism and moves under driver part's effect, makes the gas circuit cut off the gas circuit of first interface and the second interface of pressure adjustment mechanism and communicates each other.
29. A method of verifying a gas density relay as claimed in claim 28, comprising:
in a normal working state, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment, and meanwhile, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment on line through the gas density detection sensor and the intelligent control unit;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the online check contact signal sampling unit is directly or indirectly adjusted to a check state through the intelligent control unit, and in the check state, the online check contact signal sampling unit cuts off a control loop of a contact signal of the gas density relay body and connects the contact of the gas density relay body to the intelligent control unit;
the gas circuit is controlled to cut off the pressure adjusting mechanism through the intelligent control unit, the cutting part of the gas circuit cutting off the pressure adjusting mechanism moves under the action of the driving part, the cutting part cuts off the gas circuit connection of the first interface and the second interface, and along with the movement of the cutting part, the volume of the sealed cavity changes, the pressure of the gas density relay body can be adjusted, the gas pressure of the gas density relay body is slowly reduced, the gas density relay body is enabled to generate contact action, the contact action is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to the pressure value and the temperature value when the contact acts, or directly obtains the gas density value, detects the contact signal action value of the gas density relay, and the checking work of the contact signal action value of the gas density relay is completed;
the gas circuit is driven by the intelligent control unit to cut off the pressure adjusting mechanism, so that the gas pressure slowly rises, the gas density relay body is subjected to contact resetting, the contact resetting is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value when the contact is reset or directly obtains the gas density value, a contact signal return value of the gas density relay body is detected, and the checking work of the contact signal return value of the gas density relay body is completed;
after all contact signal check-up work is accomplished, unit control gas circuit cuts off pressure adjustment mechanism is controlled to the intelligence, the gas circuit cuts off the wall piece of pressure adjustment mechanism and moves under driver part's effect, makes the gas circuit cut off the gas circuit of first interface and the second interface of pressure adjustment mechanism and communicates each other to adjust on-line check-up contact signal sampling unit to operating condition, the normal operating condition of operation is resumed to the control circuit of the contact signal of gas density relay body.
30. A method of verifying a gas density relay according to claim 28, wherein said gas density relay or gas density monitoring device further comprises a temperature adjustment mechanism; the method comprises the following steps:
in a normal working state, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment, and meanwhile, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment on line through the gas density detection sensor and the intelligent control unit;
the gas density relay or the gas density monitoring device is used for checking the gas density relay according to the set checking time or/and the checking instruction and the gas density value condition under the condition that the gas density relay is allowed to be checked:
the online check contact signal sampling unit is directly or indirectly adjusted to a check state through the intelligent control unit, and in the check state, the online check contact signal sampling unit cuts off a control loop of a contact signal of the gas density relay and connects a contact of the gas density relay body to the intelligent control unit;
through intelligent control unit control gas circuit wall pressure adjustment mechanism, the gas circuit wall pressure adjustment mechanism's wall piece moves under driver part's effect, it cuts off the gas circuit of first interface and second interface and connects to cut off the piece, and along with the motion of cutting off the piece, seal chamber's volume changes, can adjust the pressure of gas density relay body makes its gas pressure slowly descend to and control through intelligent control unit right temperature adjustment mechanism's control makes the temperature rise of the temperature compensation component of gas density relay body for gas density relay body takes place the contact action, and the contact action passes through online check-up contact signal sampling unit and transmits intelligent control unit to, and intelligent control unit obtains gas density value according to pressure value, temperature value when the contact action, or directly obtains gas density value, detects out gas density relay body's contact signal action value, finishing the checking work of the contact signal action value of the gas density relay body;
the gas circuit is driven by the intelligent control unit to cut off the pressure adjusting mechanism, so that the gas pressure slowly rises, the temperature of a temperature compensation element of the gas density relay body is reduced by controlling the temperature adjusting mechanism by the intelligent control unit, the gas density relay body is subjected to contact resetting, the contact resetting is transmitted to the intelligent control unit through the online checking contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value when the contact is reset, or directly obtains the gas density value, the contact signal return value of the gas density relay is detected, and the checking work of the contact signal return value of the gas density relay body is completed;
after all contact signal check-up work is accomplished, unit control gas circuit cuts off pressure adjustment mechanism is controlled to intelligence, the gas circuit cuts off pressure adjustment mechanism's wall piece and moves under driver part's effect, makes the gas circuit cut off the gas circuit of pressure adjustment mechanism's first interface and second interface and communicates each other to and the heating element of unit shutoff temperature adjustment mechanism is controlled to intelligence, and will check up on line contact signal sampling unit and adjust operating condition, the normal operating condition of operation is resumed to the control circuit of the contact signal of gas density relay body.
CN201911263996.4A 2019-12-11 2019-12-11 Gas density relay with online self-checking function and checking method thereof Pending CN110988667A (en)

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CN201911263996.4A CN110988667A (en) 2019-12-11 2019-12-11 Gas density relay with online self-checking function and checking method thereof
PCT/CN2020/134703 WO2021115289A1 (en) 2019-12-11 2020-12-09 Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor
US17/776,219 US20220390518A1 (en) 2019-12-11 2020-12-09 Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor
EP20899597.7A EP4075467A4 (en) 2019-12-11 2020-12-09 Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111968344A (en) * 2020-07-31 2020-11-20 中国铁道科学研究院集团有限公司 Signal interface detection equipment and method for railway earthquake early warning monitoring system
WO2021115289A1 (en) * 2019-12-11 2021-06-17 上海乐研电气有限公司 Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor
WO2021218285A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay capable of intelligently monitoring whole life cycle and implementation method therefor
WO2021218286A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
WO2021218290A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
WO2021218283A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Self-diagnostic gas density relay and use method thereof
WO2021218289A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
CN117038547A (en) * 2023-09-28 2023-11-10 江苏快克芯装备科技有限公司 Sealing transfer mechanism and chip packaging equipment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021115289A1 (en) * 2019-12-11 2021-06-17 上海乐研电气有限公司 Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor
WO2021218285A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay capable of intelligently monitoring whole life cycle and implementation method therefor
WO2021218286A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
WO2021218290A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
WO2021218283A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Self-diagnostic gas density relay and use method thereof
WO2021218289A1 (en) * 2020-04-29 2021-11-04 上海乐研电气有限公司 Gas density relay with online self-checking function, and checking method therefor
CN111968344A (en) * 2020-07-31 2020-11-20 中国铁道科学研究院集团有限公司 Signal interface detection equipment and method for railway earthquake early warning monitoring system
CN117038547A (en) * 2023-09-28 2023-11-10 江苏快克芯装备科技有限公司 Sealing transfer mechanism and chip packaging equipment
CN117038547B (en) * 2023-09-28 2023-12-05 江苏快克芯装备科技有限公司 Sealing transfer mechanism and chip packaging equipment

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