CN111446115A

CN111446115A - Gas density relay capable of intelligently monitoring whole life cycle and implementation method thereof

Info

Publication number: CN111446115A
Application number: CN202010355097.3A
Authority: CN
Inventors: 金海勇; 夏铁新; 郭正操; 郝彩侠; 金海生
Original assignee: Shanghai Roye Electric Science and Technology Co Ltd
Current assignee: Shanghai Roye Electric Science and Technology Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-07-24

Abstract

The application provides a life cycle intelligent monitoring's gas density relay and implementation method thereof, and the gas density relay includes: the intelligent oil leakage detection device comprises a gas density relay body, an online checking unit, an oil leakage diagnosis detector and an intelligent control unit; the online checking unit detects a contact signal action value and/or a contact signal return value of the gas density relay body; the oil leakage diagnosis detector is used for collecting oil leakage information of the gas density relay body; the intelligent control unit or/and the background are/is used for receiving and/or calculating a contact signal action value and/or a contact signal return value of the gas density relay body, diagnosing data or/and information monitored by the oil leakage diagnosis detector and acquiring the current contact condition or/and the oil leakage condition of the gas density relay body. The intelligent monitoring system is used for intelligently monitoring the whole life cycle of the gas density relay, ensures the safety of a power grid, ensures the safe operation of the power grid, does not need maintenance, improves the efficiency, reduces the operation and maintenance cost, and greatly improves the benefit of the power grid.

Description

Gas density relay capable of intelligently monitoring whole life cycle and implementation method thereof

Technical Field

The invention relates to the technical field of electric power, in particular to a gas density relay applied to high-voltage and medium-voltage electrical equipment and capable of intelligently monitoring the whole life cycle and an implementation method thereof.

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 may form condensed water, so that the surface insulation strength of the insulation part is remarkably reduced, and even flashover occurs, 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. In addition, the oil-filled electric contact density relays which are widely used at present have very common air leakage performance phenomena at the observation window (surface glass) of the density relays from the practical operation condition, and the safety of the system are seriously influencedAnd (4) reliability. The performance of the leaked gas density relay can be greatly reduced, and meanwhile, the leaked oil can influence the reliable work of electrical equipment and needs to be found and processed in time.

With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the method has important practical significance on the online monitoring of the gas density and micro-water content state of the 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. The prior art 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 a core and key component, and the remote SF6 gas density relay or gas density transmitter is a core and key component, and how to ensure normal work is very critical. 3) The performance of the leakage density relay can be greatly reduced, and meanwhile, the leaked oil can influence the reliable work of electrical equipment, and needs to be monitored on line, found in time and processed in time.

Therefore, it is very desirable to invent a gas density relay or a gas density monitoring device capable of intelligently monitoring in a full life cycle, which is applied to a gas density monitoring system based on a ubiquitous power internet of things, so as to achieve maintenance-free, improve efficiency and ensure safety.

Disclosure of Invention

The invention provides a gas density relay (gas density monitoring device) for high-voltage or medium-voltage electrical equipment and capable of intelligently monitoring the whole life cycle and an implementation method thereof, which are used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment and simultaneously completing online gas leakage performance monitoring of the gas density relay, thereby improving the efficiency, avoiding maintenance, reducing the operation and maintenance cost and ensuring the safe operation of a power grid.

In order to achieve the purpose, the invention adopts the following technical scheme:

the application discloses in a first aspect a life cycle intelligent monitoring's gas density relay, includes: the intelligent oil leakage detection device comprises a gas density relay body, an online checking unit, an oil leakage diagnosis detector and an intelligent control unit; wherein the gas density relay body contains shockproof oil;

the online checking unit comprises a gas density detection sensor, a pressure adjusting mechanism, a valve and an online checking contact signal sampling unit; the gas circuit of the pressure regulating mechanism is communicated with the gas density relay body, and the pressure regulating mechanism is configured to regulate 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; the gas density detection sensor is communicated with the gas density relay body on a gas path; 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; one end of the valve is provided with an air inlet communicated with electrical equipment, and the other end of the valve is communicated with the air passage of the gas density relay body, or the other end of the valve is connected with the air passage of the pressure regulating mechanism, so that the valve is communicated with the air passage of the gas density relay body;

the oil leakage diagnosis detector is arranged in or outside the gas density relay body and is used for collecting oil leakage information of the gas density relay body;

the intelligence accuse unit, respectively with oil leak diagnosis detector pressure adjustment mechanism gas density detection sensor with online check-up contact signal sampling unit is connected, receives and/or calculates the data or/and the information of oil leak diagnosis detector monitoring are accomplished pressure adjustment mechanism's control, pressure value collection and temperature value collection and/or gas density value collection, and detect the contact signal action value and/or the contact signal return value of gas density relay body.

The second aspect of the present application discloses a gas density monitoring device with sealing performance self-checking includes: the intelligent oil leakage detection device comprises a gas density relay body, an online checking unit, an oil leakage diagnosis detector and an intelligent control unit; wherein the content of the first and second substances,

the gas density relay body contains shockproof oil;

Preferably, the contact signal comprises an alarm, and/or a latch.

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 gas density relay body includes: the device comprises a shell, a base, a pressure detector, a temperature compensation element and at least one signal generator, wherein the base, the pressure detector, the temperature compensation element and the at least one signal generator are arranged in the shell; 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.

Preferably, the valve is closed or opened under the control of the pressure regulating mechanism; or the valve is also connected with the intelligent control unit and is closed or opened under the control of the intelligent control unit.

More preferably, the pressure regulating mechanism and the valve are in combination, the pressure regulating mechanism comprising: the gas chamber is provided with a first interface communicated with a gas path of the gas density relay body and a second interface hermetically connected with a gas outlet of the valve, and the relative positions of the first interface and the second interface are staggered; a pressure change piece is arranged in the air chamber, the pressure change piece is in sealing contact with the inner wall of the air chamber, and a push rod is arranged on one side of the pressure change piece, which faces the second connector; the pressure change piece is connected with a driving part through a connecting piece, and the driving part drives the connecting piece to further drive the pressure change piece and the push rod to move in the air chamber so as to control the opening or closing of the valve; the gas pressure in the gas chamber changes along with the position change of the pressure change piece;

the valve comprises a valve body, an air inlet connected with electrical equipment and an air outlet connected with a pressure regulating mechanism are arranged on the valve body along the axial direction of the valve body, a valve core assembly is arranged in a cavity in the valve body and comprises a clamp spring, an elastic part and a valve core, one end of the elastic part is fixedly connected with the air inlet through the clamp spring, the other end of the elastic part is fixedly connected with one end of the valve core, the other end of the valve core penetrates through the air outlet and extends into the air chamber from a second interface of the pressure regulating mechanism and is opposite to the push rod, and a gap is formed between the valve core and the push rod; the valve core is connected with the inner wall of the valve body in a sealing way under the action of the elastic piece, and seals the air inlet and the air outlet of the valve.

Furthermore, the push rod pushes the valve core to move towards the air inlet in the cavity of the valve body, the valve core is separated from the valve body, the elastic piece is in a compressed state, and the air inlet of the valve is communicated with the air outlet.

Further, the valve core comprises a valve rod and a valve clack, and the valve clack is fixed on the valve rod; the inner wall of the valve body is provided with a funnel-shaped inclined plane, the valve clack is conical, and the outer surface of the valve clack is hermetically connected to the inclined plane of the inner wall of the valve body to seal the air inlet and the air outlet of the valve.

Furthermore, one end of an air chamber of the pressure adjusting mechanism is provided with a third interface, one end of the connecting piece is connected with the pressure changing piece, and the other end of the connecting piece penetrates out of the third interface and is connected to the driving part.

Still further, the pressure adjustment mechanism further comprises a sealing coupling, one end of the sealing coupling is connected with the third interface in a sealing manner, the other end of the sealing coupling is connected with the driving end of the driving part in a sealing manner, or the sealing coupling wraps the connecting part and the driving part in a sealing manner; preferably, the seal coupling comprises one of a bellows, a sealing bladder, and a sealing ring.

Further, the pressure changing member is a piston, or an air bag, or a bellows.

Further, the driving part comprises one of a magnetic force mechanism, 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 generation mechanism, an electric heating thrust generation mechanism and a chemical reaction thrust generation mechanism.

Further, the elastic piece is a return spring.

Furthermore, the pressure change piece and the connecting piece are integrally designed and are directly connected with the driving part; alternatively, the pressure-varying member is associated with the drive member by magnetic coupling.

Furthermore, a sealing element which is connected with the pressure regulating mechanism in a sealing way is arranged on the valve body; and/or a sealing element which is connected with the electrical equipment in a sealing way is arranged on the valve body; and/or a sealing element which is connected with the inner wall of the valve body in a sealing way is arranged on the valve core.

Further, the sealing element is any one of a rubber ring, a rubber pad or an O-shaped ring.

Preferably, the oil leakage diagnosis detector includes one or more of a liquid level transmitter, a liquid level sensor, a liquid level controller, a liquid level switch, a liquid level meter, a pressure sensor, a temperature sensor, a camera, test paper, and a chemical change reagent.

More preferably, oil leak diagnosis detector is liquid level transmitter, level sensor or level gauge, oil leak diagnosis detector sets up at this internal liquid level of gas density relay for gather this internal liquid level of gas density relay, when this internal liquid level of gas density relay is less than and/or is higher than the liquid level of settlement, the intelligence accuse unit sends oil leak alarm signal or/and information.

More preferably, the oil leakage diagnosis detector is a liquid level controller or a liquid level switch, when the gas density relay body leaks oil to a set value, the liquid level controller or the liquid level switch sends out an oil leakage alarm signal or/and information, and the oil leakage alarm signal or/and information is uploaded to the intelligent control unit.

More preferably, the oil leakage diagnosis detector is a pressure sensor, the pressure sensor is arranged in the gas density relay body, and the pressure sensor uploads the acquired pressure signal in the gas density relay body or the pressure change value within the preset time to the intelligent control unit; when the pressure value in the gas density relay body is lower than the set pressure value or the pressure change value in the gas density relay body is higher than the set pressure change range, the intelligent control unit sends out oil leakage alarm signals or/and information.

More preferably, the oil leakage diagnosis detector includes a first temperature sensor and a second temperature sensor, which are provided in the gas density relay body, wherein the first temperature sensor is provided below an oil surface of the gas density relay body, and the second temperature sensor is provided at an oil-free position of the gas density relay body;

the intelligent control unit receives a temperature signal T1 acquired by the first temperature sensor and a temperature signal T2 acquired by the second temperature sensor, and if the temperature difference | T1-T2| is less than or equal to a preset threshold value, the intelligent control unit sends out an oil leakage alarm signal and/or information; alternatively, the first and second electrodes may be,

the intelligence is controlled the unit and is generated corresponding first temperature curve according to the temperature information that received first temperature sensor gathered and show, preserve, and the temperature information that gathers according to the received second temperature sensor generates corresponding second temperature curve and shows, preserves, right first temperature curve and second temperature curve judge, in same time quantum, first temperature curve with when the trend of change of second temperature curve is unanimous or tends to unanimously, the intelligence is controlled the unit and is sent oil leak alarm signal and/or information.

More preferably, the oil leakage diagnosis detector includes a first temperature sensor and a second temperature sensor, and the first temperature sensor and the second temperature sensor are both disposed below the oil level in the gas density relay body and located at different heights;

the intelligent control unit receives a temperature signal T1 acquired by the first temperature sensor and a temperature signal T2 acquired by the second temperature sensor, and if the temperature difference | T1-T2| exceeds a preset temperature change threshold value, the intelligent control unit sends out an oil leakage alarm signal and/or information; alternatively, the first and second electrodes may be,

the intelligence is controlled the unit and is generated corresponding first temperature curve according to the temperature information that received first temperature sensor gathered and show, preserve, and the temperature information that gathers according to the received second temperature sensor generates corresponding second temperature curve and shows, preserves, and is right first temperature curve and second temperature curve judge, in same time quantum, first temperature curve with when the inconsistent or inconsistent trend of the change trend of second temperature curve is more obvious, the intelligence is controlled the unit and is sent oil leak alarm signal and/or information.

More preferably, the oil leakage diagnosis detector includes a temperature sensor disposed below an oil surface of the gas density relay body;

the intelligent control unit calculates the difference value between the received temperature value T1 sampled in the current time interval and the temperature value T2 collected in the previous adjacent time interval, and if the temperature difference value | T1-T2| exceeds a preset temperature change threshold value, the intelligent control unit sends out an oil leakage alarm signal and/or information; alternatively, the first and second electrodes may be,

the intelligent control unit generates a corresponding temperature curve according to the received temperature information collected by the temperature sensor located below the oil surface to display and store the temperature curve, judges the temperature curve according to preset information, and sends out an oil leakage alarm signal and/or information when the temperature curve is abnormal.

More preferably, the oil leakage diagnosis detector is a camera, and the camera is arranged outside the gas density relay body; the camera acquires abnormal information of the gas density relay through an image recognition technology and sends out an oil leakage alarm signal and/or information through the intelligent control unit; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

More preferably, the oil leakage diagnosis detector comprises a camera and test paper, and the camera and the test paper are arranged outside the gas density relay body; when the gas density relay leaks oil, the test paper reacts with the oil to change color, or the surface of the test paper is coated with a protective coating, after the oil leaks, the protective coating is dissolved by the oil to expose the test paper, and the test paper reacts with the reaction gas in the air to change color; the camera acquires a color-changing test paper image through an image recognition technology, acquires abnormal information of the gas density relay, and sends out an oil leakage alarm signal and/or information through the intelligent control unit; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

More preferably, the oil leakage diagnosis detector includes a camera and a chemical change agent, the camera and the chemical change agent being disposed outside the gas density relay body; when oil leakage occurs in the gas density relay, the chemical change reagent changes color, the camera acquires an image of the color-changed chemical change reagent through an image recognition technology, acquires abnormal information of the gas density relay, and sends out an oil leakage alarm signal and/or information through the intelligent control unit or the background; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

The camera can move and/or rotate to carry out multi-angle shooting.

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; 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.

More preferably, the temperature sensor may be a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be thermal resistance and thermocouple; may be digital or analog.

More preferably, the pressure sensor may also be a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil-induced pressure sensor (e.g., a pressure sensor with an induction coil in the bawden tube), a resistive pressure sensor (e.g., a pressure sensor with a slide wire resistor in the bawden tube); the pressure sensor can be an analog pressure sensor or a digital pressure sensor.

Preferably, the gas density relay or gas density monitoring device further comprises: the sealing performance detection unit comprises an oxygen sensor or/and a nitrogen sensor, and the oxygen sensor or/and the nitrogen sensor are arranged in a shell of the gas density relay body; or the sealing performance detection unit comprises an oxygen sensor or/and a nitrogen sensor and a gas hood, the gas hood is arranged outside the gas density relay body and communicated with the shell of the gas density relay body, the gas hood and the shell form a cavity together, and the oxygen sensor or/and the nitrogen sensor are arranged in the gas hood; the intelligent control unit monitors the oxygen concentration or/and the nitrogen concentration in the shell through the oxygen sensor or/and the nitrogen sensor, and when the monitored oxygen concentration or/and nitrogen concentration is lower than a set preset threshold value, the intelligent control unit sends out an air leakage alarm signal or/and information, or when the monitored oxygen concentration or/and nitrogen concentration is lower than the normal oxygen concentration or/and nitrogen concentration, the intelligent control unit sends out an air leakage alarm signal or/and information; alternatively, the first and second electrodes may be,

the sealing performance detection unit comprises an SF6 diagnostic sensor, and the SF6 diagnostic sensor is arranged in a shell of the gas density relay body; or, the sealing performance detection unit comprises an SF6 diagnostic sensor and a gas hood, the gas hood is arranged outside the gas density relay body and communicated with the shell of the gas density relay body, the gas hood and the shell form a cavity together, and the SF6 diagnostic sensor is arranged in the gas hood; the intelligent control unit monitors SF6 gas concentration in the shell through an SF6 diagnosis sensor, and when the monitored SF6 gas concentration is higher than a preset threshold value, the intelligent control unit sends out gas leakage alarm signals or/and information, or when the monitored SF6 gas concentration is higher than the SF6 gas concentration when normal, the intelligent control unit sends out gas leakage alarm signals or/and information.

More preferably, the SF6 diagnostic sensor comprises any one of an ultrasonic sensor, an infrared sensor, a laser external sensor and a gas-sensitive semiconductor sensor.

More preferably, the intelligent control system further comprises an air leakage shutoff part and a contact isolation unit, wherein the intelligent control unit is respectively connected with the air leakage shutoff part and the contact isolation unit; one end of the gas leakage shutoff piece is connected with the electrical equipment, and the other end of the gas leakage shutoff piece is connected with the gas density relay body; the gas leakage shutoff piece is configured to close a gas path connecting the electrical equipment and the gas density relay body when the sealing performance of the gas density relay body is in problem; the contact isolation unit is also directly or indirectly connected with the gas density relay body and is configured to enable the contact of the gas density relay body not to be communicated with the contact signal control loop when the gas leakage shutoff piece is closed.

Further, the air leakage shutoff part comprises one of an electric control valve, an electromagnetic valve, an electric control self-sealing valve and a temperature control valve.

Further, still include equipment side gas density detection sensor, equipment side gas density detection sensor sets up and is connected with electrical equipment at the gas leakage shutoff pieceThe device-side gas density detection sensor is connected with the intelligent control unit and is configured to monitor the gas density value P of the electrical device_SB20；

The contact isolation unit comprises an isolation connecting circuit, and the isolation connecting circuit is connected with the contact of the gas density relay body and a contact signal control loop;

when the air leakage shutoff piece is closed, if the gas density value P of the electrical equipment monitored by the equipment side gas density detection sensor_SB20When the current is larger than the preset threshold value, the contact isolation unit cuts off the isolation connecting circuit, so that the contact of the gas density relay body is not communicated with the contact signal control loop; if the gas density value P of the electrical equipment monitored by the equipment side gas density detection sensor_SB20And the isolation connecting circuit is closed to enable the contact of the gas density relay body to be communicated with the contact signal control loop.

Preferably, the online verification contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact of the gas density relay body and the contact signal control loop, and the second connecting circuit is connected with the contact of the gas density relay body and the intelligent control unit;

in a non-verification state, the second connection circuit is opened, and the first connection circuit is closed; under the check-up state, online check-up contact signal sampling unit cuts off first connecting circuit, intercommunication second connecting circuit will the contact of gas density relay body with the intelligence is controlled the unit and is connected.

More preferably, the first connection circuit comprises a first relay, the second connection circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact maintain opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay body;

in a non-checking state, the normally closed contact is closed, the normally open contact is opened, and the gas density relay monitors the output state of the contact in real time; under the check-up state, normally closed contact disconnection, normally open contact is closed, the contact of gas density relay body passes through normally open contact with the intelligence is controlled the unit and is connected.

Further, the gas density relay or the gas density monitoring apparatus further includes: a contact resistance detection unit including a third relay, a constant current source, an amplifier, and an a/D converter; wherein the third relay comprises at least one second normally open contact; the constant current source and the amplifier are connected to two ends of a contact of the gas density relay body in parallel through a second normally open contact, and the A/D converter is connected between the output end of the amplifier and the intelligent control unit in series;

in a non-checking state, the normally closed contact is closed, the normally open contact and the second normally open contact are opened, and the gas density relay monitors the output state of the contacts in real time through a control loop of the contacts;

under the check-up state, normally closed contact disconnection, normally open contact disconnection, second normally open contact is closed, the constant current source with the amplifier is parallelly connected on the contact of gas density relay body, the contact of gas density relay body passes through second normally open contact, amplifier and AD converter with the intelligence is controlled the unit and is connected.

Furthermore, the contact of the gas density relay body is isolated from the control circuit of the gas density relay body through the online check contact signal sampling unit, and when the contact signal of the gas density relay body 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.

Further, the intelligent control unit or the background evaluates the contact service life of the gas density relay body or predicts the service life of the gas density relay body according to the monitored contact resistance value of the contact.

Further, the gas density relay or the gas density monitoring apparatus further includes: an insulation performance detecting unit including a fourth relay, a voltage exciter, a current detector, an amplifier, and an a/D converter; the fourth relay comprises a third normally open contact; the contact of the gas density relay body is connected with one end of a voltage exciter through a third normally open contact, the other end of the voltage exciter is grounded through a current detector, an amplifier is connected to two ends of the current detector in parallel, and the A/D converter is connected between the output end of the amplifier and the intelligent control unit in series;

in a non-checking state, the normally closed contact is closed, the normally open contact and the third normally open contact are opened, and the gas density relay body monitors the output state of the contacts in real time through a control loop of the contacts;

under the check-up state, normally closed contact disconnection, normally open contact disconnection, the third normally open contact is closed, voltage exciter and current detector establish ties on the contact of gas density relay body, the contact of gas density relay body passes through third normally open contact, voltage exciter, amplifier and AD converter with the intelligence is controlled the unit and is connected.

Furthermore, the contact of the gas density relay body is isolated from the control circuit of the gas density relay body through the online checking contact signal sampling unit, and when the contact signal of the gas density relay body acts and/or receives an instruction of detecting the insulating property, the insulating property detecting unit carries out the insulating property test on the gas density relay body.

Preferably, the gas density relay or the gas density monitoring device is further provided with a comparison density value output signal, and the comparison density value output signal is connected with the intelligent control unit; the gas density of the gas density relay body rises or falls to a set gas density value, the comparison density value output signal outputs a corresponding signal to the intelligent control unit, the comparison density value output signal is a first density value PS20, meanwhile, the gas density value acquired by the gas density detection sensor is a second density value PJ20, and the intelligent control unit or/and the background compare the first density value PS20 with the second density value PJ20 to obtain a density difference | PJ20-PS20 |; when the density difference | PJ20-PS20| is within a preset threshold value, the current working state of a monitoring part of the gas density relay or the gas density monitoring device is a normal working state, and otherwise, the current working state is an abnormal working state; alternatively, the first and second electrodes may be,

the gas density relay or the gas density monitoring device further comprises a camera, the camera acquires a pointer display value or a digital display value of the gas density relay body through an image recognition technology, the pointer display value or the digital display value is a first density value PZ20, meanwhile, the gas density value acquired by the gas density detection sensor is a second density value PJ20, and the intelligent control unit or/and the background compare the first density value PZ20 with the second density value PJ20 to acquire a density difference | PJ20-PZ20 |; and if the density difference | PJ20-PZ20| is within a preset threshold value, the current working state of the monitoring part of the gas density relay or the gas density monitoring device is a normal working state, and otherwise, the current working state is an abnormal working state.

Preferably, the intelligent control unit diagnoses one or more of the state of the gas density detection sensor, the alarm action times of the gas density relay body, the locking action times of the gas density relay body, the contact misoperation record of the gas density relay body and the contact failure record of the gas density relay body through the online checking unit.

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 intelligent control unit receives the density value P monitored by the gas density detection sensor₂₀If the density value P₂₀Density value less than or equal to preset threshold value P_20SDThe intelligent control unit or the background sends out a liquefaction notification signal and/or information, or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit receives the temperature value T monitored by the gas density detection sensor, and if the temperature value T is less than or equal to a preset threshold temperature value T_SDThe intelligent control unit or the background sends out a liquefaction notification signal and/or information, or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit receives the pressure value P monitored by the gas density detection sensor, and in a set time period, if the pressure change value △ P is larger than or equal to a preset threshold pressure change value △ P_SDThe intelligent control unit or the background sends out a liquefaction notification signal and/or information, or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit receives the pressure value P monitored by the gas density detection sensor and detects the pressure value at a specific temperature value T_TDIf the pressure value P is less than or equal to the preset threshold pressure value P_SDThe intelligent control unit or the background sends out a liquefaction notification signal and/or information, or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit generates a corresponding density curve according to the received density value information acquired by the gas density detection sensor, displays and stores the density curve, judges or diagnoses the density curve, and sends out a liquefaction notification signal and/or information or/and notifies the time of gas liquefaction or/and notifies the duration of the gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit generates a corresponding temperature curve according to the received temperature value information acquired by the gas density detection sensor, displays and stores the temperature curve, judges or diagnoses the temperature curve, and sends out a liquefaction notification signal and/or information or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

the intelligent control unit generates a corresponding pressure curve according to the received pressure value information acquired by the gas density detection sensor to display and store, judges or diagnoses the pressure curve, and sends out a liquefaction notification signal and/or information or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction.

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 P L C, an industrial control motherboard, an embedded main control board and the like, and includes all peripherals, logic, 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 analog quantity and digital quantity information input.

Preferably, the intelligent control unit further comprises a communication module for realizing remote transmission of test data and/or monitoring results, and the communication mode of the communication module is a wired communication mode or a wireless communication mode.

Preferably, a clock is further arranged on the intelligent control unit, and the clock is configured to be used for regularly setting the monitoring time of the gas density relay body, or recording the testing time, or recording the event time.

Preferably, the intelligent control unit further comprises an edge calculation unit, the edge calculation unit performs deep calculation processing on the pressure value and the temperature value and/or the gas density value monitored by the gas density detection sensor, and the obtained information and/or the monitored value comprise an accurate density value P_{20 accurate days}、P_{20 accurate week}、P_{20 season of exactness}、P_{20 accurate month}、P_{20 accurate year}Density value P₂₀Pressure value P, temperature value T and environment temperature value T_{Environment(s)}Internal temperature value T of gas_{Inner part}Maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, air supply time, air supply quality and air leakage rate L_{Air leakage rate year}、L_{Season of air leakage}、L_{Air leakage rate of moon}、L_{Air leakage rate}、L_{Air leakage rate}One or more of them.

More preferably, the depth calculation process includes: the edge calculation unit calculates the gas density value P by using an average value method (mean value method) for the gas density value monitored in a set time interval₂₀Average value P of_{20 average}The average value P_{20 average}Is the exact density value P_{20 is accurate}(ii) a Alternatively, the edge calculation unit compares the monitored gas density value P for a set time interval₂₀Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation_{20 is accurate}(ii) a Wherein the content of the first and second substances,

the P is₂₀Corresponding to a real-time monitored gas density value, P_{20 accurate year}The exact density value corresponding to a time interval of one year, P_{20 season of exactness}The exact density value corresponding to a quarterly time interval, P_{20 accurate month}Accurate density value for a monthly time interval, P_{20 accurate week}Accurate density values for a one week time interval, P_{20 accurate days}Accurate density values corresponding to time intervals of the day.

Further, the average valueThe method comprises the following steps: setting the collection frequency in a set time interval, and carrying out average calculation processing on all the collected N gas density values at different time points to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Or setting temperature interval step length in a set time interval, and carrying out average value calculation processing on density values of N different temperature values acquired in all temperature ranges to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Or setting pressure interval step length in a set time interval, and carrying out average value calculation processing on density values of N different pressure values acquired in all pressure variation ranges to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Wherein N is a positive integer greater than or equal to 1.

Further, the depth calculation process further includes the edge calculation unit calculating a leakage rate L of the monitored electrical equipment, the leakage rate L ═ △ P_20t/t＝(P_{20 accurate t front}-P_{20 accurate t}) T, where t is a set time interval, △ P_20tIs the variation of density value, P, in time interval t_{20 accurate t front}For the exact density value, P, in the preceding time interval_{20 accurate t}The accurate density value in the current time interval is obtained; wherein the content of the first and second substances,

the L_{Air leakage rate year}Corresponding to the leakage rate of a annual time interval, said L_{Season of air leakage}Corresponding to the air leakage rate of a quarterly time interval, said L_{Air leakage rate of moon}L for leak rate of a monthly time interval_{Air leakage rate}L, corresponding to an accurate leak rate for a one week interval_{Air leakage rate}Corresponding to the air leakage rate at time intervals of the day.

Still further, the depth calculation process further includes: the edge calculation unit calculates the gas supply time T of the monitored electrical equipment_{Time of air supply}Said air supply time T_{Time of air supply}＝(P_{20 is accurate}-P_{20 air supplement}) /L, wherein P is_{20 air supplement}To set the density value of the required gas supply.

Go further forwardOne step, the depth calculation process further includes: the edge calculation unit calculates the total gas mass Q required by the gas chamber of the monitored electrical apparatus_{General assembly}＝ρ_{Need to make sure that}× V, where ρ is_{Need to make sure that}For the mass density needing air supplement, according to the density value P of the needed air supplement_{20 air supplement}And the gas characteristics thereof are obtained, V is the volume of the gas chamber of the electrical equipment; and the edge calculation unit calculates the current gas quality Q of the gas chamber of the monitored electrical equipment_{At present, the method}＝ρ_{At present, the method}× V, where ρ is_{At present, the method}For the mass density of the gas at present, according to the currently monitored gas density value P₂₀And its gas properties; from the calculated total mass Q of the gas_{General assembly}And the current gas mass Q_{At present, the method}Calculating gas supplement quality Q_{Air supplement}＝Q_{General assembly}-Q_{At present, the method}。

Preferably, the intelligent control unit and the online verification unit can perform online verification on the contact of the gas density relay body according to set temperature or/and season, and the intelligent control unit respectively acquires a gas density value P acquired by the gas density detection sensor when the gas density relay body generates contact signal action or switching when the temperature is 20 ℃, the temperature is high, the temperature is TH or/and the temperature is low, and the temperature is T L_DT20、P_DTH20Or/and P_DTL20And completing the temperature compensation test of the gas density relay or the gas density monitoring device.

More preferably, the intelligent control unit or the background receives data of the temperature compensation test if the error value | P_DT20-P_DTH20If the absolute value is within the preset threshold value, the high-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the high-temperature compensation of the gas density relay or the gas density monitoring device is unqualified; or/and if the error value (P)_DT20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; alternatively, the first and second electrodes may be,

the intelligent control unit or the background receives data of the temperature compensation test, and if the error value | P_DBZ20-P_DTH20Is within its preset threshold, where P_DBZ20The gas density is the standard contact signal action valueThe high-temperature compensation of the relay or the gas density monitoring device is qualified, otherwise, the high-temperature compensation is unqualified; or/and if the error value (P)_DBZ20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; alternatively, the first and second electrodes may be,

the intelligent control unit or the background receives data of the temperature compensation test, and if the error value | P_DT20-P_DTL20If the absolute value is within the preset threshold value, the low-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the low-temperature compensation of the gas density relay or the gas density monitoring device is unqualified; or/and if the error value (P)_DT20-P_DTL20)>0, the low-temperature compensation of the gas density relay or the gas density monitoring device is over-compensation, otherwise, under-compensation is performed; alternatively, the first and second electrodes may be,

the intelligent control unit or the background receives the temperature compensation test data, if the error value | P_DBZ20-P_DTL20Is within its preset threshold, where P_DBZ20If the low-temperature compensation is a standard contact signal action value, the low-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the low-temperature compensation is unqualified; or/and if the error value (P)_DBZ20-P_DTL20)>And 0, the low-temperature compensation of the gas density relay or the gas density monitoring device is over-compensation, otherwise, under-compensation.

Preferably, the control of the intelligent control unit is controlled through a field control and/or a background control.

Preferably, at least two of the gas density relays or the gas density monitoring devices are connected with a remote background detection system through communication equipment; the gas density relay or the gas density monitoring device is arranged on the electrical equipment corresponding to the gas chamber, and the communication mode of the communication equipment comprises a wired communication mode and a wireless communication mode.

More preferably, the wired communication mode comprises one or more of an RS232 BUS, an RS422 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a P L C power carrier and a cable Wire.

More preferably, the wireless communication mode includes one or more of a 5G/NB-IOT communication module (e.g., 5G, NB-IOT), a 2G/3G/4G/5G, WIFI, bluetooth, L ora, L orawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication, and sonar.

Preferably, at least two of the gas density relays or the gas density monitoring devices are connected with the remote background detection system sequentially through the concentrator and the protocol converter; the gas density relay or the gas density monitoring device is arranged on the electrical equipment of the corresponding gas chamber.

More preferably, the hub adopts an RS485 hub; the protocol converter adopts an IEC61850 or IEC104 protocol converter.

The third aspect of the application discloses a gas density monitoring system of full life cycle intelligent monitoring, gas density monitoring system includes foretell gas density relay or the gas density monitoring devices of full life cycle intelligent monitoring of a full life cycle intelligent monitoring.

The fourth aspect of the application discloses a method for realizing a gas density relay with intelligent monitoring in a whole life cycle, which comprises the following steps:

communicating a gas path of a pressure adjusting mechanism with a gas density relay body, wherein the pressure adjusting mechanism adjusts the pressure rise and fall of the gas density relay body to enable the gas density relay body to generate contact signal action;

communicating a gas density detection sensor with the gas density relay body on a gas path;

the online check contact signal sampling unit is directly or indirectly connected with the gas density relay body and samples a contact signal when the gas density relay body generates a contact signal action;

connecting one end of the valve with electrical equipment, and communicating the other end of the valve with the gas density relay body, or connecting the other end of the valve with a gas path of a pressure regulating mechanism, so as to communicate the valve with the gas density relay body;

arranging an oil leakage diagnosis detector in or outside the gas density relay body for collecting oil leakage information of the gas density relay body;

with intelligence accuse unit, respectively with oil leak diagnosis detector pressure adjustment mechanism gas density detection sensor with online check-up contact signal sampling unit is connected, receives and/or calculates the data or/and the information of oil leak diagnosis detector monitoring are accomplished pressure adjustment mechanism's control, pressure value collection and temperature value collection and/or gas density value collection, and detect the contact signal action value and/or the contact signal return value of gas density relay body.

Preferably, the gas density relay further includes a sealing performance detection unit, the sealing performance detection unit is configured to acquire gas leakage information of the gas density relay body by acquiring a gas pressure change, a current change, a gas concentration change, or a gas density value change in a gas path or a housing of the gas density relay body, and the implementation method further includes:

the sealing performance detection unit is arranged in or outside the gas density relay body and communicated with a gas path in the gas density relay body or communicated with a shell of the gas density relay body, and the intelligent control unit is connected with the sealing performance detection unit;

the intelligent control unit receives and/or calculates data or/and information monitored by the sealing performance detection unit, diagnoses the data or/and the information, and acquires the current air leakage state of the gas density relay body; or, the intelligent control unit uploads the received data or/and information to the background, and the background diagnoses the data or/and information monitored by the sealing performance detection unit to receive and/or calculate, so as to obtain the current gas leakage state of the gas density relay body.

More preferably, the sealing performance detecting unit includes an oxygen sensor or/and a nitrogen sensor, or the sealing performance detecting unit includes an SF6 diagnostic sensor.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1) the utility model provides a gas density relay of full life cycle intelligent monitoring for when monitoring the electrical equipment gas density of gas insulation or arc extinguishing, still accomplish the online oil leak of gas density relay, and/or gas leakage performance monitoring, improved efficiency, need not to maintain, realized full life cycle intelligent management and control to the density relay, reduced the operation maintenance cost, ensured the safe operation of electric wire netting.

2) The implementation method of the gas density relay intelligently monitored in the whole life cycle is provided, and the normal operation of the gas density relay intelligently monitored in the whole life cycle can be supported.

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 an operating state of a full-life-cycle intelligent monitoring gas density relay according to a first embodiment;

FIG. 2 is a schematic diagram of a checking state structure of a full-life-cycle intelligent monitoring gas density relay according to the first embodiment;

FIG. 3 is a schematic circuit diagram of a full-life cycle intelligent monitoring gas density relay according to a first embodiment;

FIG. 4 is a schematic circuit diagram of a full-life cycle intelligent monitoring gas density relay according to a first embodiment;

fig. 5 is a schematic structural diagram of a gas density relay body for intelligent monitoring of a full life cycle of the first embodiment;

fig. 6 is a schematic structural diagram of a gas density relay body for intelligent monitoring of the whole life cycle of the second embodiment;

fig. 7 is a schematic structural diagram of a gas density relay body for full-life cycle intelligent monitoring of the third embodiment;

FIG. 8 is a schematic structural diagram of a gas density relay body for intelligent monitoring of the whole life cycle of the fourth embodiment;

FIG. 9 is a schematic structural diagram of a gas density relay body for intelligent monitoring of the whole life cycle of the fifth embodiment;

fig. 10-12 are schematic structural diagrams of a gas density monitoring system with intelligent monitoring of a full life cycle.

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:

fig. 1 to fig. 2 are schematic structural diagrams of a gas density relay for a high and medium voltage electrical device and capable of performing intelligent monitoring in a full life cycle according to an embodiment of the present invention. The gas density relay of full life cycle intelligent monitoring includes: the gas density relay comprises a gas density relay body 1 containing shockproof oil, an online checking unit (comprising a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5 and an online checking contact signal sampling unit 6), an intelligent control unit 7, an oil leakage diagnosis detector 10, a sealing performance detection unit 11 and a contact resistance detection unit 6B. Wherein, the gas density detection sensor (pressure sensor 2, temperature sensor 3), the intelligent control unit 7, the oil leakage diagnosis detector 10 and the sealing performance detection unit 11 are all arranged on the gas density relay body 1, and the contact resistance detection unit 6B is arranged together with the online check contact signal sampling unit 6; the intelligent control unit 7 is respectively connected with the gas density detection sensor (the pressure sensor 2 and the temperature sensor 3), the pressure adjusting mechanism 5, the online check contact signal sampling unit 6, the oil leakage diagnosis detector 10 and the sealing performance detection unit 11; one end of the valve 4 is provided with an air inlet communicated with the electrical equipment 8, and the other end of the valve 4 is connected with the air passage of the pressure adjusting mechanism 5, so that the valve 4 is communicated with the air passage of the gas density relay body 1. In this embodiment, the gas density relay body 1 is disposed on the first interface 506 of the pressure adjusting mechanism 5, the valve 4 is a check valve, and the valve 4 and the pressure adjusting mechanism 5 are combined. The valve 4 is closed or opened under the control of the pressure adjusting mechanism 5, and meanwhile, the pressure adjusting mechanism 5 adjusts the pressure rise and fall of the gas density relay body 1, so that the gas density relay body 1 generates an alarm and/or unlocks a contact signal action.

Fig. 1 is a schematic view of a working state of a gas density relay or a gas density monitoring device monitored in a full life cycle, and fig. 2 is a schematic view of a calibration state of the gas density relay or the gas density monitoring device monitored in the full life cycle.

Specifically, the pressure adjusting mechanism 5 includes: the gas density relay comprises a pressure adjusting mechanism shell 5B and a gas chamber 501, wherein a first interface 506 communicated with a gas path of the gas density relay body 1 and a second interface 507 hermetically connected with a gas outlet 4A of the valve 5 are arranged on the gas chamber 501, and the relative positions of the first interface 506 and the second interface 507 are staggered; a pressure change member 502 (in this embodiment, a piston) is arranged in the air chamber 501, the pressure change member 502 is in sealing contact with the inner wall of the air chamber 501 through a sealing member 503, and a push rod 5S is arranged on one side of the pressure change member 502 facing the second port 507; the side of the pressure-changing element 502 facing away from the gas chamber 501 is connected to the movement mechanism 5D and the drive member 505 via a connection element 504, or the pressure-changing element 502 is directly connected to the drive member 505. The driving component 505 drives the connecting component 504 to drive the pressure changing component 502 and the push rod 5S to move in the air chamber 501, so as to control the opening or closing of the valve 4; the gas pressure in the gas chamber 501 changes with the position of the pressure changing member 502. The driving part 505 and the moving mechanism 5D 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 gas release 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 generating mechanism, an electric heating thrust generating mechanism, and a chemical reaction thrust generating mechanism. The heating produces the thrust mechanism, for example, heats the bimetallic strip, and then produces the thrust mechanism. The push rod 5S may also be broadly referred to as a pusher capable of opening or closing the valve 4.

One end of the air chamber 501 of the pressure adjusting mechanism 5 is provided with a third interface, one end of the connecting piece 504 is connected with the pressure changing piece 502, and the other end of the connecting piece penetrates through the third interface and is connected to the driving component 505. The pressure adjustment mechanism 5 further includes a sealing coupling 508, one end of the sealing coupling 508 is connected to the third interface in a sealing manner, and the other end of the sealing coupling 508 is connected to the driving end of the driving component 505 in a sealing manner, or the sealing coupling 508 encloses the connecting component 504 and the driving component 505 in a sealing manner in the sealing coupling 508. The sealing element coupling 508 may be a bellows, a sealing air bag, or a sealing ring, and in this embodiment, the sealing element coupling 508 is a bellows.

The valve 4 includes a valve body 404, and the valve body 404 is provided with an air inlet 4B connected to the electrical equipment 8 and an air outlet 4A connected to the pressure adjusting mechanism 5 along an axial direction thereof. A cavity inside the valve body 404 is provided with a valve core assembly, the valve core assembly includes a snap spring 405, an elastic member 403 (a return spring in this embodiment) and a valve core 401, one end of the elastic member 403 is fixedly connected with the air inlet 4B through the snap spring 405, the other end of the elastic member 403 is fixedly connected with one end of the valve core 401, and the other end of the valve core 401 penetrates through the air outlet 4A, extends into the air chamber 501 from the second interface 507 of the pressure adjusting mechanism 5, and is opposite to the push rod 5S. During verification, a gap is formed between the valve core 401 and the push rod 5S, and the valve core 401 is in sealing connection with the inner wall of the valve body 404 under the action of the elastic piece 403 to seal the air inlet 4B and the air outlet 4A of the valve 4. In this embodiment, the other end of the valve element 401 penetrates through the air outlet 4A, but does not extend into the air chamber 501 from the second port 507 of the pressure adjustment mechanism 5, and in a normal operating state, the valve element 401 and the push rod 5S abut against each other, and the valve element 401 is separated from the inner wall of the valve body 404 under the action of the push rod 5S, so that the air inlet 4B and the air outlet 4A of the valve 4 are communicated.

The valve core 401 comprises a valve rod and a valve clack, and the valve clack is fixed on the valve rod; the inner wall of the valve body 404 is provided with a funnel-shaped inclined surface, and the valve clack is conical. The shape of the valve core 401 may also be designed otherwise flexibly, implemented using existing self-sealing valve technology, such as rubber vulcanization, or the use of check balls, steel balls, etc. As shown in fig. 1, in a normal operating state, the push rod 5S of the pressure adjustment mechanism 5 pushes the valve core 401 to move in the cavity of the valve body 404 toward the air inlet 4B, the elastic member 403 is in a compressed state, the outer surface of the valve flap of the valve core 401 is separated from the inner wall of the valve body 404, and the air inlet 4B and the air outlet 4A of the valve 4 are communicated, that is, the valve 4 is in an open state. As shown in fig. 2, during verification, the outer surface of the valve flap is sealingly connected to the inclined surface of the inner wall of the valve body 404 by a sealing ring 402, so as to block the air inlet 4B and the air outlet 4A of the valve 4, i.e. the valve 4 is in a closed state.

Further, the valve body 404 is provided with

seals

407 and 5M that are sealingly connected to the pressure adjustment mechanism 5, and the valve body 404 is provided with a seal 406 that is sealingly connected to the electrical equipment 8. The sealing element can be any one of a rubber ring, a rubber pad or an O-shaped ring.

The 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.

Types of the pressure sensor 2 described above: can be an absolute pressure sensor, a relative pressure sensor, or an absolute pressure sensor and a relative pressure sensor, and the number can be several. 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, or a semiconductor type; can be a contact type and a non-contact type; 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 intelligent control unit 7 (as shown in fig. 3) comprises a processor 71(U1), a power supply 72(U2), the processor 71(U1) can be a general computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, an MCU, an FPGA, a P L C, an industrial control motherboard, an embedded main control board, and other intelligent integrated circuits, the power supply 72(U2) can be a switching power supply, an ac 220V, a dc power supply, a L DO, a programmable power supply, solar energy, a storage battery, a rechargeable battery, a battery, an electric field induction power supply, a magnetic field induction power supply, a wireless charging power supply, a capacitive power supply, and the like, the basic requirements or functions of the intelligent control unit 7 are that, the intelligent control unit 7 obtains a gas density value collected by the gas density detection sensor in an operating state, or the intelligent control unit 7 obtains a pressure value and a temperature value collected by the gas density detection sensor (a pressure sensor 2 and a temperature sensor 3), the gas density detection relay can perform online monitoring on the gas density of the monitored electrical equipment by the gas density relay, the intelligent control unit 7 can perform online monitoring by adjusting the pressure value and the gas density detection signal, and the gas density detection relay can be performed by the intelligent control unit 7, and the gas density detection relay can be performed by adjusting the gas density detection mechanism, and the gas density detection mechanism₂₀(density value), that is, the contact operating value P of the gas density relay body 1 can be detected_D20And the calibration work of the gas density relay body 1 is completed. Or the intelligent control unit 7 can directly detect the contact signal generation action of the gas density relay body 1Density value of time P_D20And the calibration work of the gas density relay body 1 is completed. Simultaneously, intelligence accuse unit 7 can also accomplish the self-checking between gas density relay body 1, pressure sensor 2, the temperature sensor 3 through the test of the rated pressure value of gas density relay body 1, realizes non-maintaining.

The online checking contact signal sampling unit 6 is controlled by the contact signal interlocking piece 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, namely, during the verification, the safe operation of the electrical equipment is not influenced when the contact signal of the gas density relay body 1 acts; 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 damage the gas density relay or influence the test operation.

As shown in fig. 1 and fig. 2, the working principle of a gas density relay or a gas density monitoring device with intelligent monitoring of a full life cycle is as follows: when the intelligent control unit 7 is in a working state, the intelligent control unit 7 monitors the gas pressure and the temperature of the electrical equipment according to the pressure sensor 2 and the temperature sensor 3 to obtain a corresponding pressure value P at 20 DEG C₂₀(i.e., gas density values, i.e., on-line monitoring of gas density values). The push rod 5S of the pressure adjusting mechanism 5 pushes the valve element 401 in the cavity of the valve body 404 toward the air inlet4B, the elastic element 403 is in a compressed state, the outer surface of the valve flap of the valve core 401 is separated from the inner wall of the valve body 404, the air inlet 4B of the valve 4 is communicated with the air outlet 4A, that is, the valve 4 is in an open state, and the air chamber 501 of the pressure regulating mechanism 5 is communicated with the air paths of the gas density relay body 1 and the electrical equipment 8.

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 P_S(ii) a The gas density relay (or the density monitoring device) issues a command to drive the driving member 505 and the moving mechanism 5D of the pressure adjusting mechanism 5 through the intelligent control unit 7, and the driving member 505 and the moving mechanism 5D drive the connecting member 504 to move to the right, so that the pressure changing member 502 and the sealing member 503 move to the right (in a direction away from the valve 4), as shown in fig. 2. And in the motion, the case 401 of valve 4 is kept away from to push rod 5S, and case 401 moves right under the effect of elastic component 403, and the surface of valve clack passes through sealing washer 402 sealing connection on the inclined plane of valve body 404 inner wall, blocks up the air inlet 4B and the gas outlet 4A of valve 4, the self-closing gas circuit, and then the gas circuit of shutoff gas density relay body 1 and electrical equipment 8 to accomplish the control circuit that online check-up contact signal sampling unit 6 cut off gas density relay body 1' S contact signal through contact signal interlock piece 5K, be connected to intelligence accuse unit 7 with the contact of gas density relay body 1. The gas density value P is already carried out before the gas density relay starts to be verified₂₀Not less than set safety check density value P_SThus the gas of the electrical equipment 8 is within safe operating range, and moreover gas leakage is a slow process and safe to check. Along with the motion of pressure change piece 502 and sealing member 503, the volume of air chamber 501 changes, can adjust the pressure of gas density relay body 1 makes its gas pressure slowly descend for gas density relay body 1 takes place the contact action, and its contact action transmits intelligence through online check-up contact signal sampling unit 6 and controls unit 7, and the temperature value T that pressure value P and temperature sensor 3 gathered that pressure sensor 2 gathered when intelligence was controlled unit 7 was moved according to the contact and temperature sensor 3 gathered, and then through the contactGas density value P is obtained through over calculation₂₀Or directly obtaining the gas density value P₂₀Detecting the contact signal operating value P of the gas density relay body 1_D20And 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 detected_D20. Treat that the contact action value of the warning of gas density relay body 1 and/or blocking signal all detects out the back, 7 drive pressure adjustment mechanism 5 of unit are controlled to rethread intelligence, and pressure change piece 502 moves (toward 4 directions of valve motion promptly) toward the left side, and the volume of air chamber 501 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 resets and transmits intelligence through online check-up contact signal sampling unit 6 and controls unit 7, and pressure value P, temperature value T when intelligence is controlled unit 7 and resets according to the contact obtain gas density value P₂₀Or directly obtaining the gas density value P₂₀Detecting the contact signal return value P of the gas density relay_F20Completing the contact signal return value P of the gas density relay_F20The 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.

Still be provided with check valve on-off state monitor 15 in this embodiment, check valve on-off state monitor 15 sets up with pressure adjustment mechanism 5 is corresponding, in this embodiment, check valve on-off state monitor 15 adopts travel switch, and when valve 4 was in the on-state, pressure adjustment mechanism 5 made check valve on-off state monitor 15 output a signal, and this signal is connected with intelligent accuse unit 7, can upload to target equipment (for example backstage).

After all contact signal check-up work is accomplished, 7 control pressure adjustment mechanism 5 of unit are controlled to intelligence, the push rod 5S of pressure adjustment mechanism 5 moves left under the effect of motion 5D and driver component 505, and the effort is applyed to case 401 of valve 4, makes valve 4 open, and the gas circuit of electrical equipment 8 and gas density relay body 1 communicates each other (as shown in fig. 1) to along with contact signal interlock piece 5K' S motion, will check on line that contact signal sampling unit 6 adjusts to operating condition, the normal operating condition of operation is resumed to the control circuit of the contact signal of gas density relay body 1. As shown in fig. 1: at this time, the valve 4 is opened, the gas density relay body 1 is communicated with the electrical equipment 8 on the gas path, and the gas density relay body 1 normally monitors the gas density of the gas chamber of the electrical equipment 8 and can monitor the gas density of the electrical equipment 8 on line. That is, the density monitoring circuit of the gas density relay body 1 operates 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 operates safely and reliably. Therefore, the online checking work of the gas density relay body 1 can be conveniently completed, and the safe operation of the electrical equipment 8 can not be influenced when the gas density relay body 1 is checked online.

According to the gas density relay or gas density monitoring device with the intelligent control unit 7 and the online verification unit (comprising the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure adjusting mechanism 5 and the online verification contact signal sampling unit 6), which are provided by the invention, the online verification can be carried out on the contacts of the gas density relay body 1 according to the set temperature or/and seasons, for example, at the temperature of 20 ℃, the high temperature TH (such as 50 ℃) or/and the low temperature T L (such as minus 30 ℃ below zero), the online verification is respectively carried out on the contacts of the gas density relay body 1, the intelligent control unit 7 respectively obtains the contact signal action or switching of the gas density relay body 1 when the temperature of 20 ℃, the high temperature TH (such as 50 ℃) or/and the low temperature T L (such as minus 30 ℃ below zero), and the gas density value P collected by the gas density detection sensor_D20(contact signal operating value at 20 ℃), P_DTH20(contact signal operation value at high temperature TH) and/or P_DTL20(contact signal action value at low temperature T L) to complete the temperature compensation test of the gas density relay or the gas density monitoring device, furthermore, the intelligent control unit 7 or the background receives the temperature compensation test data, if the error value | P_DT20-P_DTH20If the absolute value is within the preset threshold value, the high-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the high-temperature compensation of the gas density relay or the gas density monitoring device is unqualified; or/and if the error value (P)_DT20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; or, the intelligent control unit 7 or the background receives the temperature compensation test data, if the error value | P_DBZ20-P_DTH20Is within its preset threshold, where P_DBZ20If the high temperature compensation is a standard contact signal action value, the high temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the high temperature compensation is unqualified; or/and if the error value (P)_DBZ20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; or, the intelligent control unit 7 or the background receives the temperature compensation test data, if the error value | P_DT20-P_DTL20If the absolute value is within the preset threshold value, the low-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the low-temperature compensation of the gas density relay or the gas density monitoring device is unqualified; or/and if the error value (P)_DT20-P_DTL20)>0, the low-temperature compensation of the gas density relay or the gas density monitoring device is over-compensation, otherwise, under-compensation is performed; or, the intelligent control unit 7 or the background receives the temperature compensation test data, if the error value | P_DBZ20-P_DTL20Is within its preset threshold, where P_DBZ20If the low-temperature compensation is a standard contact signal action value, the low-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the low-temperature compensation is unqualified; or/and if the error value (P)_DBZ20-P_DTL20)>And 0, the low-temperature compensation of the gas density relay or the gas density monitoring device is over-compensation, otherwise, under-compensation. The performance of the selected/used gas density relay at high temperature and low temperature is ensured to be qualified and normal through a temperature compensation test, and the safe and reliable operation of a power grid is ensured.

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. In a word, after the gas density relay finishes on-line verification work, if abnormity occurs, an alarm can be automatically sent out, and the alarm can be uploaded to a far end.

Fig. 3 is a schematic circuit diagram of a life-cycle intelligent monitoring gas density relay according to the first embodiment. As shown in fig. 3, the on-line verification contact signal sampling unit 6 of the present embodiment includes a first connection circuit connected to the contact P of the gas density relay body 1 and a second connection circuit_JA control circuit connected with the contact point P of the gas density relay body 1, and a second connecting circuit_JAnd the intelligent control unit 7. In a non-verification state, the second connection circuit is opened, and the first connection circuit is closed; in the checking state, the online checking contact signal sampling unit 6 cuts off the first connecting circuit, communicates the second connecting circuit and connects the contact P of the gas density relay body 1_JIs connected with the intelligent control unit 7. Specifically, the first connection circuit includes a first relay J1, and the second connection circuit includes a second relay J2. The first relay J1 is provided with normally closed contacts J11 and J12, and the normally closed contacts J11 and J12 are connected in series in a control loop of the contact signal; the second relay J2 is provided with normally open contacts J21 and J22, and normally open contacts J21 and J22 are connected to a contact P of the gas density relay body 1_JThe above step (1); the first relay J1 and the second relay J2 may be integrated into a single unit, i.e., a relay having normally open and normally closed contacts. In the non-checking state, normally closed contacts J11 and J12 are closed, normally open contacts J21 and J22 are opened, and the contact P is monitored in real time by the gas density relay_JThe output state of (1); in the verification state, the normally closed contacts J11 and J12 are opened, the normally open contacts J21 and J22 are closed, and the contact P of the gas density relay body 1 is closed_JAnd is connected with the intelligent control unit 7 through normally open contacts J21 and J22.

To further illustrate, as shown in fig. 3, the gas density relay or the gas density monitoring apparatus further includes a contact resistance detection unit 6B, and the contact resistance detection unit 6B is disposed together with the online check contact signal sampling unit 6. Contact resistance testThe measurement unit 6B includes a third relay J3(63), a constant current source 64, an amplifier 65, and an a/D converter 66. The third relay J3 includes normally open contacts J31 and J32; the constant current source 64 and the amplifier 65 are connected in parallel to the contact P of the gas density relay body 1 through normally open contacts J31 and J32_JThe a/D converter 66 is connected in series between the output of the amplifier 65 and the intelligent control unit 7.

When the contact signal of the gas density relay body 1 acts, the intelligent control unit 7 sends out an instruction for detecting the contact resistance of the contact, the line check contact signal sampling unit 6 is controlled by the intelligent control unit 7, and the two contacts J11 and J12 of the first relay J1(61) are disconnected, so that the contact P is enabled to be connected_JThe control circuit with the contacts is open and the two pairs of normally open contacts J21 and J22 of the second relay J2(62) remain open. Then, under the control of the intelligent control unit 7, the third relay J3(63) of the contact resistance detecting unit 6B is operated, and the two pairs of normally open contacts J31 and J32 thereof are closed, so that the constant current source 64 and the amplifier 65 are connected to the contact P_JConnected to each other by a current I generated by a constant current source 64_JSo that the contact point P_JVoltage U is generated at two ends_JThe accurate voltage U is obtained through the processing of the amplifier 65, the A/D converter 66 and the intelligent control unit 7_JThe intelligent control unit 7 is based on R_J＝U_J/I_JThen the contact resistance R of the gas density relay body 1 can be detected_J. The present embodiment also adopts a constant current method, mainly considering that the resistance of the tested contact is a tiny resistance, and in order to improve the measurement accuracy and eliminate the influence of the test lead on the measurement result, the four-wire system can be adopted for measurement. In addition, the intelligent control unit 7 adds a return-to-zero function on software design, and can correct a test result according to a measured error so as to further improve the contact resistance value R of the contact point_JThe measurement accuracy of (2). After the whole gas density relay verification (including contact resistance detection) is completed, the intelligent control unit 7 controls the connection point J31 and the connection point J32 of the third relay J3 to be disconnected, and the connection point J21 and the connection point J22 of the second relay J2 of the online verification connection point signal sampling unit 6 to be disconnected, at the moment, the connection point P of the gas density relay body 1 is disconnected_JIt is determined by disconnecting the contacts J21 and J22 of the second relay J2 from the intelligent control unitThe elements 7 are not connected. Meanwhile, the intelligent control unit 7 opens the valve 4, so that the gas density relay body 1 is communicated with the electrical equipment 8 on the gas path. Then, the contacts J11 and J12 of the first relay J1 of the online check contact signal sampling unit 6 are closed, so that the gas density relay body 1 continues to monitor the gas density of the electrical equipment 8 safely, and the electrical equipment 8 works safely and reliably. Therefore, the online checking work (including contact resistance detection) of the gas density relay 1 can be conveniently completed, and the safe operation of the electrical equipment 8 can not be influenced when the gas density relay 1 is checked online.

The intelligent control unit 7 or the background evaluates the contact service life of the gas density relay body 1 or predicts the service life of the gas density relay according to the monitored contact resistance value, and the density relay is ensured to be reliable.

In a preferred embodiment, the contact resistance detecting unit 6B described above may be replaced with an insulating property detecting unit 6C. As shown in fig. 4, the insulation performance detecting unit 6C includes a fourth relay J4(67), a voltage exciter 603, a current detector 604, an amplifier 605, and an a/D converter 606. The fourth relay J4(67) includes a normally open contact J41; a contact point P of the gas density relay body 1_JOne end of the voltage driver 603 is connected through a normally open contact J41, the other end of the voltage driver 603 is grounded through a current detector 604, an amplifier 605 is connected in parallel to both ends of the current detector 604, and the a/D converter 606 is connected in series between the output end of the amplifier 605 and the intelligent control unit 7.

When the contact signal of the gas density relay body 1 acts, the intelligent control unit 7 sends a command for detecting the insulation performance of the contact, the line check contact signal sampling unit 6 is controlled by the intelligent control unit 7, and the two contacts J11 and J12 of the first relay J1(61) are disconnected, so that the contact P is enabled to be connected_JThe control circuit to the gas density relay contacts is open while the two pairs of normally open contacts J21 and J22 of the second relay J2(62) remain open. Then, under the control of the intelligent control unit 7, the fourth relay J4(67) of the insulation performance detection unit 6C is actuated, and the normally open contact J41 thereof is closed, so that the contact P is closed_JWith voltage exciter 603, current detectionThe device 604 and the housing (ground) are connected to each other, and the leakage current Ix1 generated in the loop by the voltage exciter 603 is processed by the amplifier 605, the a/D converter 606 and the intelligent control unit 7 to obtain the accurate leakage current Ix1, which is combined with the voltage U generated by the voltage exciter 603_J1, the resistor Rd1 of the present province of the voltage exciter 603, the resistor Rd2 of the present province of the current detector 604, and the intelligent control unit 7 can conveniently detect the contact insulation performance value R of the gas density relay body 1_Jy(R_Jy＝U _J1/Ix1-Rd1-Rd 2). This embodiment also can adopt the constant voltage method, mainly considers that the contact insulation resistance that is surveyed is great resistance, and in addition, intelligence accuse unit 7 increases the function of returning to zero in software design to can revise the test result according to measured error, with further improvement contact insulation performance value R_JAnd y measurement accuracy. After the verification is completed, the intelligent control unit 7 controls the connection point J41 of the fourth relay J4 to be disconnected, and the normally open connection point J21 and the normally open connection point J22 of the second relay J2 of the online verification connection point signal sampling unit 6 to be disconnected, at the moment, the connection point P of the gas density relay body 1_JThe smart control unit 7 is disconnected by opening the normally open contacts J21 and J22 of the second relay J2. The intelligent control unit 7 controls the valve 4 to be opened, so that the gas density relay 1 is communicated with the electrical equipment on a gas path. Then, the normally closed contacts J11 and J12 of the first relay J1 of the on-line verification contact signal sampling unit 6 are closed, and the contact P of the gas density relay body 1 is closed_JThe control loop works normally, and the gas density relay monitors the gas density of the electrical equipment safely, so that the electrical equipment works safely and reliably. Therefore, the online checking work of the gas density relay is conveniently completed, and the safe operation of the electrical equipment is not influenced.

The positions of the gas density relay body 1, the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure adjusting mechanism 5, the online checking contact signal sampling unit 6 and the intelligent control unit 7 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 pressure adjusting mechanism 5 may be provided together. In short, the arrangement between them can be flexibly arranged and combined. The gas chamber 501 may be hollow or partially hollow, and may be shaped to cooperate with the pressure changing member 502 to adjust the pressure change of the gas when used in cooperation with the pressure changing member 502.

Fig. 5 is a schematic structural diagram of a gas density relay body for full-life-cycle intelligent monitoring of high and medium voltage electrical equipment according to an embodiment of the present invention. As shown in fig. 5, the oil leakage diagnosis detector 10 in the present embodiment includes a liquid level transmitter, a liquid level sensor, or a liquid level meter, and is disposed inside the gas density relay body 1. The gas density relay body 1 is filled with a certain amount of oil 112 (generally, silicone oil), and the amount of the oil 112 is controlled to a set liquid level 11201. The oil leakage diagnosis detector 10 (a liquid level transmitter, or a liquid level sensor, or a liquid level meter) is connected with the intelligent control unit 7, and the collected liquid level in the gas density relay body 1 is uploaded to the intelligent control unit 7; when the liquid level in the gas density relay body 1 is lower than and/or higher than the set liquid level 11201 to a certain degree, the intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information.

In this embodiment, the oil 112 in the gas density relay body 1 is the set liquid level 11201 after the filling is completed and the requirement of the set amount is met. The set liquid level 11201 is stored as initial data in the connected intelligent control unit 7 or uploaded to the background for comparing the collected actual liquid level variation and judging whether oil leakage occurs. Wherein, gas density relay body 1 includes: the temperature compensation device comprises a shell 102, and a base 108, a pressure detector 103, a temperature compensation element 104, an end seat 108 and a plurality of signal generators 109 which are arranged in the shell 102; the signal generator 109 is a microswitch or a magnetic-assisted electric contact, the pressure detector 103 is a barton tube, the temperature compensation element 104 adopts a temperature compensation sheet, the gas density relay body 1 outputs a contact signal through the signal generator 109, and the gas density is monitored through the pressure detector 103 and the temperature compensation element 104. The principle is as follows: the varying pressure and temperature are corrected based on the pressure detector 103 and with the temperature compensation element 104 to reflect the variation in the (sulphur hexafluoride) gas density. Under the pressure of the measured medium (such as SF6), when the density value of sulfur hexafluoride (or other) gas changes due to the action of the temperature compensation element 104, the pressure value of the gas also changes correspondingly, so that the tail end of the pressure detector 103 is forced to generate corresponding elastic deformation displacement, and the corresponding elastic deformation displacement is transmitted to the movement 105 by means of the temperature compensation element 104, and the movement 105 is transmitted to the pointer 106, so that the density value of the measured (sulfur hexafluoride) gas is indicated on the dial. The signal generator 109 serves as an output alarm lockout contact. The gas density relay body 1 can display the gas density value. If air leaks and the density value of the gas is reduced, the pressure detector 103 correspondingly displaces downwards and transmits the gas to the movement 105 through the temperature compensation element 104, the movement 105 transmits the gas 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; meanwhile, the pressure detector 103 drives the beam to move downwards through the temperature compensation element 104, the adjusting piece 107 on the beam gradually leaves the signal generator 109, and when the adjusting piece reaches a certain degree, the contact of the signal generator 109 is connected to send out a corresponding contact signal (alarm or lock). If the gas density value rises, that is, if the gas density value in the sealed gas chamber is higher than the set gas density value, the density value rises correspondingly, the end of the pressure detector 103 and the temperature compensation element 104 displace upwards correspondingly, the temperature compensation element 104 displaces the beam upwards, the adjusting piece 107 on the beam displaces upwards and pushes the contact of the signal generator 109 to be opened, and the contact signal (alarm or lock) is released.

In this embodiment, after the oil (e.g., silicone oil) 112 in the gas density relay body 1 is filled to reach the set liquid level 11201, there is a possible oil leakage situation during the actual use. The working process of oil leakage diagnosis and detection is as follows: the oil leakage diagnosis detector 10 is disposed at a proper position in the housing 102 of the gas density relay body 1, and is used for collecting actual liquid level change data of the oil liquid 112, and transmitting the collected actual liquid level change data to the connected intelligent control unit 7 or transmitting the data to a background through the intelligent control unit 7. The intelligent control unit 7 diagnoses and compares the received and/or calculated data and/or information monitored by the oil leakage diagnosis detector 10 with the set initial data of the liquid level 11201 to obtain the current actual liquid level variation of the gas density relay body 1, and when the liquid level in the gas density relay body 1 is lower than and/or higher than the set liquid level 11201 to a certain extent, the intelligent control unit 7 sends out an oil leakage alarm signal and/or information; or the intelligent control unit 7 uploads the received and/or calculated and monitored data and/or information to the background, diagnosis and comparison are carried out on the background and the set initial data of the liquid level 11201, the current actual liquid level variation of the gas density relay body 1 is obtained, and when the liquid level in the gas density relay body 1 is lower than and/or higher than the set liquid level 11201 to a certain degree, the background sends out an oil leakage alarm signal and/or information.

Sealing performance detecting element 11 in this embodiment is oxygen sensor or/and nitrogen sensor, and sealing performance detecting element 11 sets up in gas density relay body 1, and is connected with intelligence accuse unit 7. The unit 7 is controlled to intelligence through oxygen sensor or/and nitrogen gas sensor monitoring casing oxygen concentration or/and nitrogen gas concentration, and when oxygen concentration or/and nitrogen gas concentration monitored were less than the preset threshold value that sets for, unit 7 was controlled to intelligence sent gas leakage alarm signal or/and information, perhaps, when oxygen concentration or/and nitrogen gas concentration monitored were less than normal oxygen concentration or/and nitrogen gas concentration, unit 7 was controlled to intelligence sent gas leakage alarm signal or/and information.

After the gas density relay finishes the oil leakage or gas leakage performance diagnosis work of the gas density relay body, if the oil leakage or gas leakage performance diagnosis work is abnormal, an alarm CAN be automatically sent out and the alarm CAN be uploaded to a far end or CAN be sent to a specified receiver, for example, a mobile phone, the communication mode of the gas density relay is wired or wireless, the wired communication mode CAN be industrial buses such as RS232, RS422, RS485 and CAN-BUS, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, P L C power carrier waves and the like, the wireless communication mode CAN be 2G/3G/4G/5G and the like, WIFI, Bluetooth, L ora, L orawan, Zigbee, infrared, ultrasonic waves, sound waves, satellites, light waves, quantum communication, sonar, a 5G/NB-IOT communication module (such as NB-IOT) and the like.

In a word, in this embodiment, when the gas density relay or the gas density monitoring device of full life cycle intelligent monitoring monitored the gas density of the gas insulated or arc-extinguishing electrical equipment, still accomplished the online check-up to the gas density relay body, online oil leak diagnosis, online sealing (gas leakage) performance monitoring, contact resistance monitoring, insulating properties detects, and efficiency has been improved, need not to maintain, realizes full life cycle intelligent management and control to the density relay, has reduced the operation maintenance cost, has ensured the safe operation of electric wire netting.

Example two:

fig. 6 is a schematic structural diagram of a gas density relay body for full-life-cycle intelligent monitoring for high and medium voltage electrical equipment according to a second embodiment of the present invention.

The difference of this embodiment from the first embodiment is:

the oil leakage diagnosis detector 10 of the present embodiment is mainly composed of a camera (or a camera). The camera includes a camera body 1001 and a camera shield 1002. The camera is arranged outside the gas density relay body 1 (or inside the body). The principle is as follows: the camera obtains the information of the gas density relay through an image recognition technology, the information comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation, and the intelligent control unit 7 or the background sends out oil leakage performance alarm signals or/and information.

Or, the oil leakage diagnosis detector 10 mainly comprises a camera and test paper 1003, and the camera and test paper 1003 are arranged outside or inside the gas density relay body 1. When the oil leak appears in gas density relay body 1, test paper 1003 and oil take place the reaction and change colour, the camera passes through the test paper 1003 image that image recognition technology obtained discolouring, obtains gas density relay's information, for example the oil leak, intake, rust, foreign matter invasion, dial plate blur etc. intelligence accuse unit 7 or backstage send oil leak alarm signal and/or information. In a preferred embodiment, the surface of the test paper 1003 may further be coated with a protective coating, after oil leaks, the protective coating is dissolved by the oil, the test paper 1003 is exposed, the test paper 1003 undergoes a chemical reaction with a reaction gas in the air to change color, the camera acquires an image of the color-changed test paper 1003 through an image recognition technology to acquire information of the gas density relay, and the intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information.

Alternatively, the oil leakage diagnosis detector 10 mainly includes a camera and a chemical change agent 1003, and the camera and the chemical change agent 1003 are disposed in the gas density relay body 1 or the body. When oil leakage occurs in the gas density relay body 1, the chemical change reagent 1003 changes color, the camera acquires images of the color-changed chemical change reagent 1003 through an image recognition technology, information of the gas density relay, such as oil leakage, water inflow, rusting and the like, and the intelligent control unit 7 or the background sends out oil leakage alarm signals and/or information.

In this embodiment, the camera may be movable and/or rotatable, and may perform photographing at multiple angles.

Example three:

fig. 7 is a schematic structural diagram of a gas density relay body for intelligent monitoring of a full life cycle for a high-voltage electrical apparatus, a medium-voltage electrical apparatus, and a high-voltage electrical apparatus in accordance with an embodiment of the present invention.

The difference of this embodiment from the first embodiment is:

the sealing performance detection unit 11 is an SF6 diagnostic sensor 1101, and the SF6 diagnostic sensor 1101 can be arranged in the shell 102 of the gas density relay 1; alternatively, the sealing performance detecting unit 11 may further include a gas cover (or a leaking gas collector) 1102, and the gas cover 1102 is disposed outside the gas density relay body 1 and communicated with the housing 102 of the gas density relay body 1 to form a relatively sealed cavity (the SF6 diagnostic sensor and the bottom thereof are required to be sealed, and the leaked SF6 gas can be collected, that is, the upper part of the SF6 diagnostic sensor in the cavity may not be completely sealed). The SF6 diagnostic sensor 1101 and intelligent control unit 7 are disposed in the gas hood 1102. The SF6 diagnostic sensor 1101 includes, but is not limited to, one of an ultrasonic sensor, an infrared sensor, a laser external sensor, and a gas sensitive semiconductor sensor. The SF6 diagnosis sensor 1101 is connected with the intelligent control unit 7, the intelligent control unit 7 monitors SF6 gas concentration through the SF6 diagnosis sensor 1101, and when the SF6 gas concentration is higher than a preset threshold value, the intelligent control unit 7 or a background sends out a gas leakage alarm signal or/and information; or when the monitored SF6 gas concentration is higher than the normal SF6 gas concentration, the intelligent control unit 7 or the background sends out a gas leakage alarm signal or/and information.

The working principle of the embodiment is as follows: the gas cover 1102 is disposed outside the gas density relay body 1 and communicates with the housing 102 of the gas density relay body 1 to form a sealed chamber. The sealed cavity is normally filled with gas with certain stability, generally one or more of air and nitrogen. Normally, the amount of the air in the sealed cavity is fixed, and the SF6 diagnostic sensor 1101 is used to monitor the concentration of SF6 in the air, that is, the concentration of SF6 gas in the sealed cavity is fixed. When the air path of the gas density relay body 1 has air leakage performance, the leaked air can be sealed in the sealed cavity, so that the concentration of SF6 in the sealed cavity is increased. The intelligent control unit 7 monitors the SF6 gas concentration through an SF6 diagnosis sensor, and when the monitored SF6 gas concentration is higher than a preset threshold value, the intelligent control unit 7 or a background sends out a gas leakage alarm signal or/and information; or when the monitored SF6 gas concentration is higher than the normal SF6 gas concentration, the intelligent control unit 7 or the background sends out a gas leakage alarm signal or/and information.

Example four:

fig. 8 is a schematic structural diagram of a gas density relay body for full-life-cycle intelligent monitoring for a four-high/medium-voltage electrical device according to an embodiment of the present invention.

The difference of this embodiment from the first embodiment is:

1) the gas density relay body 1 further has a comparison density value output signal 1505, and the comparison density value output signal 1505 is connected with the intelligent control unit 7. The gas density of the gas density relay body 1 rises or falls to a set gas density value P, the comparison density value output signal 1505 outputs a corresponding signal to the intelligent control unit 7, the comparison density value output signal 1505 is a first density value PS20, meanwhile, the gas density value collected by the gas density detection sensor (the pressure sensor 2 and the temperature sensor 3) is a second density value PJ20, and the intelligent control unit 7 or/and the background compares the first density value PS20 with the second density value PJ20 to obtain a density difference | PJ20-PS20 |; and when the density difference | PJ20-PS20| is within a preset threshold value, the current working state of the monitoring part of the gas density relay or the gas density monitoring device is a normal working state, and otherwise, the current working state is an abnormal working state. Through the online monitoring and diagnosis, the gas density relay is ensured to be in a normal state, manual maintenance is not needed, and the purpose of intelligently monitoring the gas density relay in a full life cycle is achieved.

2) The intelligent control unit 7 further comprises an edge calculation unit, wherein the edge calculation unit is used for calculating the acquired gas density value P₂₀Carrying out depth calculation processing on the pressure value P and the temperature value T, and obtaining information and/or monitoring values including accurate density value P_{20 accurate days}、P_{20 accurate week}、P_{20 season of exactness}、P_{20 accurate month}、P_{20 accurate year}Density value P₂₀Pressure value P, temperature value T and environment temperature value T_{Environment(s)}Internal temperature value T of gas_{Inner part}Maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, air supply time, air supply quality and air leakage rate L_{Air leakage rate year}、L_{Season of air leakage}、L_{Air leakage rate of moon}、L_{Air leakage rate}、L_{Air leakage rate}One or more of them.

Specifically, the depth calculation processing includes: the edge calculation unit calculates the gas density value P by using an average value method (mean value method) for the gas density value monitored in a set time interval₂₀Average value P of_{20 average}The average value P_{20 average}Is the exact density value P_{20 is accurate}(ii) a Alternatively, the edge calculation unit compares the monitored gas density value P for a set time interval₂₀Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation_{20 is accurate}(ii) a Wherein, the P₂₀Corresponding to a real-time monitored gas density value, P_{20 accurate year}The exact density value corresponding to a time interval of one year, P_{20 season of exactness}The exact density value corresponding to a quarterly time interval, P_{20 accurate month}Accurate density value for a monthly time interval, P_{20 accurate week}Accurate density values for a one week time interval, P_{20 accurate days}Accurate density values corresponding to time intervals of the day.

The average method described above is: setting the collection frequency in a set time interval, and carrying out average calculation processing on all the collected N gas density values at different time points to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Or setting temperature interval step length in a set time interval, and carrying out average value calculation processing on density values of N different temperature values acquired in all temperature ranges to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Or setting pressure interval step length in a set time interval, and carrying out average value calculation processing on density values of N different pressure values acquired in all pressure variation ranges to obtain a gas density value P₂₀Average value P of_{20 average}(ii) a Wherein N is a positive integer greater than or equal to 1.

The edge calculation unit of the intelligent control unit 7 has accurate density values P of a plurality of different time intervals_{20 is accurate}. For example, the exact density values P for a plurality of different time intervals_{20 is accurate}Accurate density values P corresponding to one annual time interval respectively_{20 accurate year}Accurate density values P, each corresponding to a quarterly time interval_{20 season of exactness}Accurate density values P, each corresponding to a monthly time interval_{20 accurate month}Accurate density values P, corresponding respectively to one week time intervals_{20 accurate week}Accurate density values P corresponding to time intervals of one day, respectively_{20 accurate days}. The accurate density values P of the plurality of different time intervals_{20 is accurate}And the gas density value of the electrical equipment is more accurately monitored on line by uploading the gas density value to target equipment or a target platform through the communication module. In general, the density value P_{20 accurate year}Sum density value P_{20 season of exactness}Judging the electrical equipment suitable for micro leakage; and a density value P_{20 accurate month}Sum density value P_{20 accurate week}Judging the electrical equipment suitable for medium-sized air leakage; and a density value P_{20 accurate days}Sum density value P₂₀And (real-time) the method is suitable for judging the electrical equipment with serious air leakage. Through multistage calculation, the safety is guaranteed in multilayer monitoring promptly, improves accurate performance again, has also creatively solved difficult problem in the industry simultaneously: the temperature difference between the gas density relay and the gas chamber of the electrical equipment.

The depth calculation process further includes the edge calculation unit calculating a leakage rate L of the monitored electrical equipment, the leakage rate L ═ △ P_20t/t＝(P_{20 accurate t front}-P_{20 accurate t}) T, where t is a set time interval, △ P_20tIs the variation of density value, P, in time interval t_{20 accurate t front}For the exact density value, P, in the preceding time interval_{20 accurate t}Is the accurate density value in the current time interval, wherein, the density value is L_{Air leakage rate year}Corresponding to the leakage rate of a annual time interval, said L_{Season of air leakage}Corresponding to the air leakage rate of a quarterly time interval, said L_{Air leakage rate of moon}L for leak rate of a monthly time interval_{Air leakage rate}L, corresponding to an accurate leak rate for a one week interval_{Air leakage rate}Corresponding to the air leakage rate at time intervals of the day.

The depth calculation process further includes: the edge calculation unit calculates the gas supply time T of the monitored electrical equipment_{Time of air supply}Said air supply time T_{Time of air supply}＝(P_{20 is accurate}-P_{20 air supplement}) /L, wherein P is_{20 air supplement}To set the density value of the required gas supply.

The depth calculation process further includes: the edge calculation unit calculates the total gas mass Q required by the gas chamber of the monitored electrical apparatus_{General assembly}＝ρ_{Need to make sure that}× V, where ρ is_{Need to make sure that}For the mass density needing air supplement, according to the density value P of the needed air supplement_{20 air supplement}And the gas properties thereof are obtained,v is the volume of the air chamber of the electrical equipment; and the edge calculation unit calculates the current gas quality Q of the gas chamber of the monitored electrical equipment_{At present, the method}＝ρ_{At present, the method}× V, where ρ is_{At present, the method}For the mass density of the gas at present, according to the currently monitored gas density value P₂₀And its gas properties; from the calculated total mass Q of the gas_{General assembly}And the current gas mass Q_{At present, the method}Calculating gas supplement quality Q_{Air supplement}＝Q_{General assembly}-Q_{At present, the method}。

3) The gas density relay or monitoring device further has a notice of occurrence of gas liquefaction, or/and a notice of time of occurrence of gas liquefaction, or/and a notice of duration (duration) of occurrence of gas liquefaction. Specifically, the intelligent control unit 7 receives the density value P monitored by the gas density detection sensor₂₀If the density value P₂₀Density value less than or equal to preset threshold value P_20SDThe intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time when the gas is liquefied, or/and notifies the duration of the gas liquefaction. Or the intelligent control unit 7 receives the temperature value T monitored by the gas density detection sensor, and if the temperature value T is less than or equal to a preset threshold temperature value T_SDOr, the intelligent control unit 7 receives the pressure value P monitored by the gas density detection sensor, and if the pressure change value △ P is more than or equal to a preset threshold pressure change value △ P in a set time period_SDThe intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time when the gas is liquefied, or/and notifies the duration of the gas liquefaction. Or, the intelligent control unit 7 receives the pressure value P monitored by the gas density detection sensor and detects the pressure value P at a specific temperature value T_TDIf the pressure value P is less than or equal to the preset threshold pressure value P_SDThe intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time when the gas is liquefied, or/and notifies the duration of the gas liquefaction. Or the intelligent control unit 7 is based onThe received density value information collected by the gas density detection sensor generates a corresponding density curve to be displayed and stored, the density curve is judged or diagnosed, and the intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time for gas liquefaction or/and notifies the duration for gas liquefaction. Or, the intelligent control unit 7 generates a corresponding temperature curve according to the received temperature value information collected by the gas density detection sensor, displays and stores the temperature curve, judges or diagnoses the temperature curve, and the intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time for generating gas liquefaction, or/and notifies the duration for generating gas liquefaction. Or, the intelligent control unit 7 generates a corresponding pressure curve according to the received pressure value information collected by the gas density detection sensor, displays and stores the pressure curve, judges or diagnoses the pressure curve, and the intelligent control unit 7 or the background sends out a liquefaction notification signal and/or information, or/and notifies the time for generating gas liquefaction, or/and notifies the duration for generating gas liquefaction.

Example seven:

fig. 9 is a schematic structural diagram of a gas density relay body for a five-high/medium-voltage electrical device and for full-life-cycle intelligent monitoring in an embodiment of the present invention.

The difference between this embodiment and the third embodiment is: in the embodiment, a multi-way joint 9, a gas leakage shutoff piece 13, a contact isolation unit 14 and an equipment side gas density detection sensor 12 are additionally arranged. The intelligent control unit 7 is respectively connected with the air leakage shutoff piece 13, the contact isolation unit 14 and the equipment side gas density detection sensor 12. One end of the gas leakage shutoff piece 13 is connected with the multi-way joint 9, the multi-way joint 9 is connected with the electrical equipment 8, and the other end of the gas leakage shutoff piece 13 is connected with the joint 110 of the gas density relay body 1; the gas leakage shutoff member 13 is configured to shut off the gas passage connecting the electrical equipment 8 and the gas density relay body 1 side when a problem occurs in the sealing performance of the gas density relay body 1 side. The contact isolation unit 14, which is also connected directly or indirectly to the gas density relay body 1, is connected toIs configured to make the contact of the gas density relay body 1 not communicate with the contact signal control circuit when the blow-by gas shutoff 13 is closed. The device side gas density detection sensor 12 (in this case, a pressure sensor and a temperature sensor or a temperature sensor matched with the pressure sensor for online detection) is arranged on the multi-way connector 9 on one side of the air leakage shutoff part 13 connected with the electrical device 8, the intelligent control unit 7 is connected with the device side gas density detection sensor 12 and is configured to monitor the gas density value P of the electrical device 8_SB20. The contact isolation unit 14 and the intelligent control unit 7 can be arranged together.

The air leakage monitoring principle of this embodiment is the same as that of the third embodiment, and is not described herein again. The difference lies in that when gas leakage appears in gas density relay body 1 one side, can close the gas circuit that electrical equipment 8 and gas density relay body 1 one side are connected through controlling gas leakage shutoff piece 13, prevent this gas leakage and continue to take place, stop this gas leakage accident promptly and continue to take place. The specific working principle is as follows: the leakage shutoff member 13 in this embodiment may include one of an electric control valve, an electromagnetic valve, an electric control self-sealing valve, and a temperature control valve. When the sealing performance of one side of the gas density relay body 1 is in a problem, namely the intelligent control unit 7 or the background sends out an air leakage alarm signal or/and information, the intelligent control unit 7 closes the air path connected with the electrical equipment 8 and one side of the gas density relay body 1 by controlling the air leakage shutoff piece 13; and when the gas leakage shutoff piece 13 (such as an electric control valve) is closed, the intelligent control unit 7 monitors the gas density value P of the electrical equipment 8 through the equipment side gas density detection sensor 12_SB20(ii) a When the monitored gas density value P of the electrical equipment 8 is_SB20The intelligent control unit 7 controls the contact isolation unit 14 to make the contact of the gas density relay body 1 not communicated with the contact signal control loop when the value is larger than a preset threshold value (generally, slightly larger than an alarm value or a locking value); and the monitored gas density value P of the electrical equipment 8_SB20Less than or equal to the preset threshold value, the intelligent control unit 7 makes the contact of the gas density relay body 1 be communicated with or communicated with (originally not communicated with but switched to be communicated with) the contact signal control loop through the control contact isolation unit 14. Thus, it is practicalNow: when air leakage occurs at one side of the gas density relay body 1, the air path connected with the electrical equipment 8 and one side of the gas density relay body 1 can be closed by controlling the air leakage shutoff piece 13, so that the air leakage is prevented from continuing to occur, namely, the air leakage accident is prevented from continuing to occur; meanwhile, the intelligent control unit 7 also monitors the gas density value P of the electrical equipment 8 in real time through the equipment side gas density detection sensor 12_SB20And controls the contact isolation unit 14 in real time according to the situation to ensure that the electrical equipment 8 still runs reliably, i.e. the gas density value P_SB20When the threshold value is larger than the preset threshold value, the contact isolation unit 14 plays a role, and does not upload error signals to cause locking or false alarm; when the gas density value P is_SB20When the value is less than or equal to the preset threshold value, the contact isolation unit 14 is equivalent to be ineffective, and the density relay sends out an alarm or a locking signal. In addition, the intelligent control unit 7 or the background sends out air leakage information in time, so that operation and maintenance personnel can know the information in time and handle air leakage events in time. Can avoid gas density relay body 1 to take place the gas leakage problem like this, reduce SF6 gas emission in the air, it is safer, also be favorable to the environmental protection. The occurrence of gas leakage at one side of the gas density relay body 1 refers to the occurrence of gas leakage in devices or components such as the gas density relay body 1 (e.g., a bourdon tube, a welded part, or a joint), or a partial sealing performance detector, or an online verification unit (e.g., a gas density detection sensor, a pressure adjustment mechanism).

Example eight:

fig. 10 to 12 are schematic structural diagrams of a gas density monitoring system with full-life-cycle intelligent monitoring for high and medium voltage electrical equipment. The gas density monitoring system comprises the gas density relay or the gas density monitoring device with the full-life-cycle intelligent monitoring function.

As shown in fig. 10, a plurality of electrical devices provided with air chambers, a plurality of gas density relays or gas density monitoring devices intelligently monitored in a full life cycle are connected with a remote background detection system through a concentrator and an IEC61850 protocol converter in sequence; wherein, the gas density relay or the gas density monitoring device of full life cycle intelligent monitoring set up respectively on the electrical equipment that corresponds the air chamber.

As shown in fig. 10 and 11, the PC is an online monitoring background host and system, the Gateway is a network switch, the Server is an integrated application Server, the ProC is a protocol converter/online monitoring intelligent unit, the HUB is a HUB, and Z is a gas density relay or a gas density monitoring device for intelligent monitoring of a full life cycle. The architecture of the gas density monitoring system comprises: simple architecture (fig. 10), conventional architecture (fig. 11), complex architecture, etc.

1) system architecture diagram and brief description, 1) background software platform based on Windows, L inux and other, or VxWorks, Android, Unix, UCos, FreeRTOS, RTX, embOS, MacOS.2), background software key business module, basic functions such as authority management, equipment management, data storage query, and user management, alarm management, real-time data, historical data, real-time curve, historical curve, configuration management, data acquisition, data analysis, recording conditions, exception handling, 3), interface configuration such as Form interface, Web interface, configuration interface, and the like.

Specifically, as shown in fig. 10, the on-line monitoring background host and system PC communicate with a plurality of HUB HUBs (HUB1, HUB2, … … HUB) via HUB 0. Each HUB is connected with a group of gas density relays (or gas density monitoring devices) Z for intelligent monitoring of the whole life cycle, for example, the HUB1 is connected with the gas density relays (or gas density monitoring devices) Z11, Z12 and … … Z1 n for intelligent monitoring of the whole life cycle, the HUB2 is connected with the gas density relays (or gas density monitoring devices) Z21, Z22, … … Z2n and … … for intelligent monitoring of the whole life cycle, and the HUB HUBm is connected with the gas density relays (or gas density monitoring devices) Zm1, Zm2 and … … Zmn for intelligent monitoring of the whole life cycle, wherein m and n are natural numbers.

As shown in fig. 11, the online monitoring background host and the system PC are connected to two integrated application servers 1 and Server2 through a Gateway network, the two integrated application servers 1 and Server2 communicate with a plurality of protocol converters/online monitoring intelligent units ProC (ProC1, ProC2 and … … ProCn) through a station control layer a network and a B network, and the protocol converters/online monitoring intelligent units ProC communicate with a plurality of HUB HUBs (HUB1, HUB2 and … … HUB) through an R5485 network. Each HUB is connected with a group of gas density relays (or gas density monitoring devices) Z for intelligent monitoring of the whole life cycle, for example, the HUB1 is connected with the gas density relays (or gas density monitoring devices) Z11, Z12 and … … Z1 n for intelligent monitoring of the whole life cycle, the HUB2 is connected with the gas density relays (or gas density monitoring devices) Z21, Z22, … … Z2n and … … for intelligent monitoring of the whole life cycle, and the HUB HUBm is connected with the gas density relays (or gas density monitoring devices) Zm1, Zm2 and … … Zmn for intelligent monitoring of the whole life cycle, wherein m and n are natural numbers.

Fig. 12 is a system diagram of a wireless transmission scheme. In the figure, the dotted frame indicates that the wireless module Wn and the gas density relay Zn can be integrated or separated, and the specific scheme can be flexible. The multiple integrated application servers 1, servers 2 and … … servers n are in Wireless communication with the gas density relays through the cloud end Cluod, the Wireless Gateway (Wireless Gateway) and the Wireless modules of the gas density relays. Wherein n is a natural number.

It should be noted that, in the present application, a gas density relay with intelligent monitoring in a full life cycle generally refers to a structure in which its constituent elements are designed as a whole; the gas density monitoring device generally refers to that the components of the gas density monitoring device are designed into a split structure and flexibly formed. Gas temperature broadly refers to the temperature within the gas, or the corresponding ambient temperature. The gas density relay can be technically improved by utilizing the original gas density relay of the transformer substation. In addition, the sealing performance detector comprises an oxygen sensor or/and a nitrogen sensor and a gas cover, wherein the gas cover is arranged outside the gas density relay body and can not be directly communicated with the shell of the gas density relay body, the place where gas leakage exists is covered to form a cavity, and the oxygen sensor or/and the nitrogen sensor (or other sealing performance detectors) are arranged in the gas cover. The gas hood is configured to collect gas that leaks, is convenient for accumulate more gas that leaks, can make the test more accurate. The gas hood can be correspondingly arranged according to the requirement. In short, the sealing performance detector is arranged in or outside the gas density relay body and communicated with a gas path in the gas density relay body or communicated with a cavity formed by gas hoods, and gas leakage information of the gas density relay body or the device is obtained through gas pressure change, current change, gas concentration change or gas density change on the gas collection path or in the cavity formed by the gas hoods.

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

1. A full life cycle intelligent monitoring gas density relay, comprising: the intelligent oil leakage detection device comprises a gas density relay body, an online checking unit, an oil leakage diagnosis detector and an intelligent control unit; wherein the content of the first and second substances,

the gas density relay body contains shockproof oil;

2. A full life cycle intelligent monitoring's gas density monitoring devices which characterized in that includes: the intelligent oil leakage detection device comprises a gas density relay body, an online checking unit, an oil leakage diagnosis detector and an intelligent control unit; wherein the content of the first and second substances,

the gas density relay body contains shockproof oil;

3. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the contact signal includes an alarm, and/or a latch.

4. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the valve is closed or opened under the control of the pressure regulating mechanism; or the valve is also connected with the intelligent control unit and is closed or opened under the control of the intelligent control unit.

5. The gas density relay or gas density monitoring device of claim 4, wherein: the pressure adjustment mechanism and valve are in combination, the pressure adjustment mechanism comprising: the gas chamber is provided with a first interface communicated with a gas path of the gas density relay body and a second interface hermetically connected with a gas outlet of the valve, and the relative positions of the first interface and the second interface are staggered; a pressure change piece is arranged in the air chamber, the pressure change piece is in sealing contact with the inner wall of the air chamber, and a push rod is arranged on one side of the pressure change piece, which faces the second connector; the pressure change piece is connected with a driving part through a connecting piece, and the driving part drives the connecting piece to further drive the pressure change piece and the push rod to move in the air chamber so as to control the opening or closing of the valve; the gas pressure in the gas chamber changes along with the position change of the pressure change piece;

6. The gas density relay or gas density monitoring device of claim 5, wherein: the push rod pushes the valve core to move towards the air inlet in the cavity of the valve body, the valve core is separated from the valve body, the elastic piece is in a compressed state, and the air inlet of the valve is communicated with the air outlet.

7. The gas density relay or gas density monitoring device of claim 5, wherein: the valve core comprises a valve rod and a valve clack, and the valve clack is fixed on the valve rod; the inner wall of the valve body is provided with a funnel-shaped inclined plane, the valve clack is conical, and the outer surface of the valve clack is hermetically connected to the inclined plane of the inner wall of the valve body to seal the air inlet and the air outlet of the valve.

8. The gas density relay or gas density monitoring device of claim 5, wherein: and one end of the air chamber of the pressure adjusting mechanism is provided with a third interface, one end of the connecting piece is connected with the pressure changing piece, and the other end of the connecting piece penetrates out of the third interface and is connected to the driving part.

9. The gas density relay or gas density monitoring device of claim 8, wherein: the pressure adjusting mechanism further comprises a sealing coupling piece, one end of the sealing coupling piece is connected with the third 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 sealing coupling piece enables the connecting piece and the driving part to be wrapped in the sealing coupling piece in a sealing mode; the seal coupler includes one of a bellows, a sealing bladder, and a sealing ring.

10. The gas density relay or gas density monitoring device of claim 5, wherein: the pressure change part is a piston, or an air bag, or a corrugated pipe; the driving part comprises one of a magnetic force mechanism, a motor, an electric push rod motor, a stepping motor, a reciprocating mechanism, a Carnot cycle mechanism, an air compressor, a compressor, an air release 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 generation mechanism, an electric heating thrust generation mechanism and a chemical reaction thrust generation mechanism; the elastic piece is a return spring.

11. The gas density relay or gas density monitoring device of claim 5, wherein: the valve body is provided with a sealing element which is connected with the pressure regulating mechanism in a sealing way; and/or a sealing element which is connected with the electrical equipment in a sealing way is arranged on the valve body; and/or a sealing element which is connected with the inner wall of the valve body in a sealing way is arranged on the valve core.

12. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the oil leakage diagnosis detector comprises one or more of a liquid level transmitter, a liquid level sensor, a liquid level controller, a liquid level switch, a liquid level meter, a pressure sensor, a temperature sensor, a camera, test paper and a chemical change reagent.

13. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leak diagnosis detector is liquid level transmitter, level sensor or level gauge, the oil leak diagnosis detector sets up at this internally at gas density relay for gather this internal liquid level of gas density relay, this internal liquid level of gas density relay be less than and/or when being higher than the liquid level of settlement, the intelligence is controlled the unit and is sent oil leak alarm signal or information.

14. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector is a liquid level controller or a liquid level switch, when oil leakage to a set value occurs to the gas density relay body, the liquid level controller or the liquid level switch sends an oil leakage alarm signal or/and information, and the oil leakage alarm signal or/and information is uploaded to the intelligent control unit.

15. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector is a pressure sensor, the pressure sensor is arranged in the gas density relay body, and the pressure sensor uploads a collected pressure signal in the gas density relay body or a pressure change value within a preset time to the intelligent control unit; when the pressure value in the gas density relay body is lower than the set pressure value or the pressure change value in the gas density relay body is higher than the set pressure change range, the intelligent control unit sends out oil leakage alarm signals or/and information.

16. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor and the second temperature sensor are arranged in the gas density relay body, the first temperature sensor is arranged below the oil surface of the gas density relay body, and the second temperature sensor is arranged at an oil-free position of the gas density relay body;

17. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor and the second temperature sensor are both arranged below the oil surface in the gas density relay body and are positioned at different heights;

18. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector comprises a temperature sensor, and the temperature sensor is arranged below the oil surface of the gas density relay body;

19. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector is a camera which is arranged outside the gas density relay body; the camera acquires abnormal information of the gas density relay through an image recognition technology and sends out an oil leakage alarm signal and/or information through the intelligent control unit; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

20. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector comprises a camera and test paper, and the camera and the test paper are arranged outside the gas density relay body; when the gas density relay leaks oil, the test paper reacts with the oil to change color, or the surface of the test paper is coated with a protective coating, after the oil leaks, the protective coating is dissolved by the oil to expose the test paper, and the test paper reacts with the reaction gas in the air to change color; the camera acquires a color-changing test paper image through an image recognition technology, acquires abnormal information of the gas density relay, and sends out an oil leakage alarm signal and/or information through the intelligent control unit; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

21. The gas density relay or gas density monitoring device of claim 12, wherein: the oil leakage diagnosis detector comprises a camera and a chemical change reagent, and the camera and the chemical change reagent are arranged outside the gas density relay body; when oil leakage occurs in the gas density relay, the chemical change reagent changes color, the camera acquires an image of the color-changed chemical change reagent through an image recognition technology, acquires abnormal information of the gas density relay, and sends out an oil leakage alarm signal and/or information through the intelligent control unit or the background; the abnormal information acquired by the camera comprises one or more of oil leakage, water inflow, rusting, foreign matter invasion, dial plate blurring, rubber aging, rubber fracture, device damage, device falling and device clamping stagnation.

22. 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; 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.

23. A gas density relay or a gas density monitoring device according to claim 22, wherein: the pressure sensor is arranged on the gas path of the gas density relay body; 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.

24. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density relay also comprises a sealing performance detection unit, wherein the sealing performance detection unit comprises an oxygen sensor or/and a nitrogen sensor, and the oxygen sensor or/and the nitrogen sensor are arranged in the shell of the gas density relay body; or the sealing performance detection unit comprises an oxygen sensor or/and a nitrogen sensor and a gas hood, the gas hood is arranged outside the gas density relay body and communicated with the shell of the gas density relay body, the gas hood and the shell form a cavity together, and the oxygen sensor or/and the nitrogen sensor are arranged in the gas hood; the intelligent control unit monitors the oxygen concentration or/and the nitrogen concentration in the shell through the oxygen sensor or/and the nitrogen sensor, and when the monitored oxygen concentration or/and nitrogen concentration is lower than a set preset threshold value, the intelligent control unit sends out an air leakage alarm signal or/and information, or when the monitored oxygen concentration or/and nitrogen concentration is lower than the normal oxygen concentration or/and nitrogen concentration, the intelligent control unit sends out an air leakage alarm signal or/and information; alternatively, the first and second electrodes may be,

25. A gas density relay or a gas density monitoring device according to claim 24 wherein: the intelligent control unit is respectively connected with the air leakage shutoff part and the contact isolation unit; one end of the gas leakage shutoff piece is connected with the electrical equipment, and the other end of the gas leakage shutoff piece is connected with the gas density relay body; the gas leakage shutoff piece is configured to close a gas path connecting the electrical equipment and the gas density relay body when the sealing performance of the gas density relay body is in problem; the contact isolation unit is also directly or indirectly connected with the gas density relay body and is configured to enable the contact of the gas density relay body not to be communicated with the contact signal control loop when the gas leakage shutoff piece is closed.

26. A gas density relay or a gas density monitoring device according to claim 25 wherein: still include equipment side gas density detection sensor, equipment side gas density detection sensor sets up the one side that is connected with electrical equipment at the gas leakage shutoff piece, equipment side gas density detection sensor is connected with the intelligent control unit, is configured to the gas density value P who monitors electrical equipment_SB20；

27. A gas density relay or a gas density monitoring device according to claim 25 wherein: the air leakage shutoff part comprises one of an electric control valve, an electromagnetic valve, an electric control self-sealing valve and a temperature control valve.

28. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the online checking contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact of the gas density relay body and the contact signal control loop, and the second connecting circuit is connected with the contact of the gas density relay body and the intelligent control unit;

29. The gas density relay or gas density monitoring device of claim 28, wherein: the first connecting circuit comprises a first relay, the second connecting circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact are kept in opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay body;

30. A gas density relay or a gas density monitoring device according to claim 29 wherein: the contact resistance detection unit comprises a third relay, a constant current source, an amplifier and an A/D converter; wherein the third relay comprises at least one second normally open contact; the constant current source and the amplifier are connected to two ends of a contact of the gas density relay body in parallel through a second normally open contact, and the A/D converter is connected between the output end of the amplifier and the intelligent control unit in series;

31. A gas density relay or a gas density monitoring device according to claim 29 wherein: the insulation performance detection unit comprises a fourth relay, a voltage exciter, a current detector, an amplifier and an A/D converter; the fourth relay comprises a third normally open contact; the contact of the gas density relay body is connected with one end of a voltage exciter through a third normally open contact, the other end of the voltage exciter is grounded through a current detector, an amplifier is connected to two ends of the current detector in parallel, and the A/D converter is connected between the output end of the amplifier and the intelligent control unit in series;

32. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the gas density relay or the gas density monitoring device is also provided with a comparison density value output signal which is connected with the intelligent control unit; the gas density of the gas density relay body rises or falls to a set gas density value, the comparison density value output signal outputs a corresponding signal to the intelligent control unit, the comparison density value output signal is a first density value PS20, meanwhile, the gas density value acquired by the gas density detection sensor is a second density value PJ20, and the intelligent control unit or/and the background compare the first density value PS20 with the second density value PJ20 to obtain a density difference | PJ20-PS20 |; when the density difference | PJ20-PS20| is within a preset threshold value, the current working state of a monitoring part of the gas density relay or the gas density monitoring device is a normal working state, and otherwise, the current working state is an abnormal working state; alternatively, the first and second electrodes may be,

33. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit diagnoses one or more of the state of the gas density detection sensor, the alarm action times of the gas density relay body, the locking action times of the gas density relay body, the contact misoperation record of the gas density relay body and the contact failure record of the gas density relay body through the online checking unit.

34. 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.

35. 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,

36. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit receives the density value P monitored by the gas density detection sensor₂₀If the density value P₂₀Density value less than or equal to preset threshold value P_20SDThe intelligent control unit or the background sends out a liquefaction notification signal and/or information, or/and notifies the time of gas liquefaction or/and notifies the duration of gas liquefaction; alternatively, the first and second electrodes may be,

37. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: 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, input and output.

38. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit further comprises an edge calculation unit, the edge calculation unit carries out depth calculation processing on the pressure value and the temperature value and/or the gas density value monitored by the gas density detection sensor, and the obtained information and/or the monitored value comprise accurate density value P_{20 accurate days}、P_{20 accurate week}、P_{20 season of exactness}、P_{20 accurate month}、P_{20 accurate year}Density value P₂₀Pressure value P, temperature value T and environment temperature value T_{Environment(s)}Internal temperature value T of gas_{Inner part}Maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, air supply time, air supply quality and air leakage rate L_{Air leakage rate year}、L_{Season of air leakage}、L_{Air leakage rate of moon}、L_{Air leakage rate}、L_{Air leakage rate}One or more ofSeveral kinds of them.

39. The gas density relay or gas density monitoring device of claim 38, wherein the depth calculation process comprises: the edge calculation unit calculates the gas density value P by adopting an average value method to the gas density value monitored in the set time interval₂₀Average value P of_{20 average}The average value P_{20 average}Is the exact density value P_{20 is accurate}(ii) a Alternatively, the edge calculation unit compares the monitored gas density value P for a set time interval₂₀Fourier transform is carried out, the frequency spectrum is converted into corresponding frequency spectrum, periodic components are filtered out, and then accurate density value P is obtained through calculation_{20 is accurate}(ii) a Wherein the content of the first and second substances,

40. The gas density relay or gas density monitoring device of claim 39, wherein the depth calculation process further comprises the edge calculation unit calculating a gas leakage rate L of the monitored electrical equipment, the gas leakage rate L ═ △ P_20t/t＝(P_{20 accurate t front}-P_{20 accurate t}) T, where t is a set time interval, △ P_20tIs the variation of density value, P, in time interval t_{20 accurate t front}For the exact density value, P, in the preceding time interval_{20 accurate t}The accurate density value in the current time interval is obtained; wherein the content of the first and second substances,

the L_{Air leakage rate year}Corresponding to the leakage rate of a annual time interval, said L_{Season of air leakage}Air leakage rate corresponding to a quarterly time interval, thereforL_{Air leakage rate of moon}L for leak rate of a monthly time interval_{Air leakage rate}L, corresponding to an accurate leak rate for a one week interval_{Air leakage rate}Corresponding to the air leakage rate at time intervals of the day.

41. The gas density relay or gas density monitoring device of claim 40, wherein the depth calculation process further comprises: the edge calculation unit calculates the gas supply time T of the monitored electrical equipment_{Time of air supply}Said air supply time T_{Time of air supply}＝(P_{20 is accurate}-P_{20 air supplement}) /L, wherein P is_{20 air supplement}Setting a density value needing air supplement; and/or

The edge calculation unit calculates the total gas mass Q required by the gas chamber of the monitored electrical apparatus_{General assembly}＝ρ_{Need to make sure that}× V, where ρ is_{Need to make sure that}For the mass density needing air supplement, according to the density value P of the needed air supplement_{20 air supplement}And the gas characteristics thereof are obtained, V is the volume of the gas chamber of the electrical equipment; and the edge calculation unit calculates the current gas quality Q of the gas chamber of the monitored electrical equipment_{At present, the method}＝ρ_{At present, the method}× V, where ρ is_{At present, the method}For the mass density of the gas at present, according to the currently monitored gas density value P₂₀And its gas properties; from the calculated total mass Q of the gas_{General assembly}And the current gas mass Q_{At present, the method}Calculating gas supplement quality Q_{Air supplement}＝Q_{General assembly}-Q_{At present, the method}。

42. The gas density relay according to claim 1 or the gas density monitoring device according to claim 2, wherein the intelligent control unit and the online verification unit can perform online verification on the contact of the gas density relay body according to a set temperature or/and season, and the intelligent control unit respectively obtains the gas density value P acquired by the gas density detection sensor when the contact signal action or switching of the gas density relay body occurs at 20 ℃, a high temperature TH or/and a low temperature T L_DT20、P_DTH20Or/and P_DTL20And completing the temperature compensation test of the gas density relay or the gas density monitoring device.

43. A gas density relay or a gas density monitoring device according to claim 42 wherein: the intelligent control unit or the background receives data of the temperature compensation test, and if the error value | P_DT20-P_DTH20If the absolute value is within the preset threshold value, the high-temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the high-temperature compensation of the gas density relay or the gas density monitoring device is unqualified; or/and if the error value (P)_DT20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; alternatively, the first and second electrodes may be,

the intelligent control unit or the background receives data of the temperature compensation test, and if the error value | P_DBZ20-P_DTH20Is within its preset threshold, where P_DBZ20If the high temperature compensation is a standard contact signal action value, the high temperature compensation of the gas density relay or the gas density monitoring device is qualified, otherwise, the high temperature compensation is unqualified; or/and if the error value (P)_DBZ20-P_DTH20)>0, the high-temperature compensation of the gas density relay or the gas density monitoring device is under-compensation, otherwise, the high-temperature compensation is over-compensation; alternatively, the first and second electrodes may be,

the intelligent control unit or the background receives the temperature compensation test data, if the error value | P_DBZ20-P_DTL20Is within its preset threshold, where P_DBZ20The low-temperature compensation of the gas density relay or the gas density monitoring device is qualified if the signal action value of the standard contact is the standard contact signal action valueOtherwise, the product is unqualified; or/and if the error value (P)_DBZ20-P_DTL20)>And 0, the low-temperature compensation of the gas density relay or the gas density monitoring device is over-compensation, otherwise, under-compensation.

44. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: the intelligent control unit is controlled through field control and/or background control.

45. The gas density relay of claim 1 or the gas density monitoring device of claim 2, wherein: at least two gas density relays or gas density monitoring devices are connected with a remote background detection system sequentially through a concentrator and a protocol converter; the gas density relay or the gas density monitoring device is arranged on the electrical equipment of the corresponding gas chamber.

46. A gas density relay or a gas density monitoring device according to claim 45 wherein: the hub adopts an RS485 hub; the protocol converter adopts an IEC61850 or IEC104 protocol converter.

47. A method for implementing a full-life cycle intelligent monitoring gas density relay as claimed in claim 1, comprising:

48. The implementation method of the full-life-cycle intelligent monitoring gas density relay as claimed in claim 47, wherein the gas density relay further comprises a sealing performance detection unit, the sealing performance detection unit is configured to acquire gas leakage information of the gas density relay body by collecting gas pressure change, or current change, or gas concentration change, or gas density change in a gas path or a housing of the gas density relay body, and the implementation method further comprises:

arranging the sealing performance detection unit in or outside the gas density relay body, and connecting the intelligent control unit with the sealing performance detection unit;