WO2021218285A1

WO2021218285A1 - Gas density relay capable of intelligently monitoring whole life cycle and implementation method therefor

Info

Publication number: WO2021218285A1
Application number: PCT/CN2021/076131
Authority: WO
Inventors: 金海勇; 夏铁新; 郭正操; 郝彩侠; 金海生; 常敏; 叶小伟; 谭庆
Original assignee: 上海乐研电气有限公司
Priority date: 2020-04-29
Filing date: 2021-02-09
Publication date: 2021-11-04

Abstract

A gas density relay capable of intelligently monitoring the whole life cycle and an implementation method therefor. The gas density relay comprises a gas density relay body (1), an online check unit, an oil leakage diagnostic detector (10), and an intelligent control unit (7), wherein the online check unit measures a contact signal action value and/or a contact signal return value of the gas density relay body; the oil leakage diagnostic detector is used for acquiring the oil leakage information of the gas density relay body; the intelligent control unit diagnoses the received and/or calculated contact signal action value and/or contact signal return value of the gas density relay body, and the data and/or information detected by the oil leakage diagnostic detector to obtain the current contact state and/or oil leakage status of the gas density relay body. The present application is used for intelligently monitoring the whole life cycle of a gas density relay, ensures the safety of a power grid, guarantees safe operation of the power grid, does not need maintenance, improves efficiency, reduces operation and maintenance costs, and improves the benefits of the power grid.

Description

A gas density relay capable of intelligently monitoring the whole life cycle and its realization method

This application claims the priority of the following patent applications:

1. The application number applied on April 29, 2020 is 202010354553.2 (title of the invention: a gas density relay capable of diagnosing oil leakage and its oil leakage diagnosis method);

2. The application number applied for on April 29, 2020 is 202010355097.3 (title of the invention: a gas density relay with intelligent monitoring throughout its life cycle and its implementation method).

Technical field

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

Background technique

At present, SF6 (sulfur hexafluoride) electrical equipment has been widely used in the power sector, industrial and mining enterprises, and has promoted the rapid development of the power industry. In recent years, with the rapid economic development, the capacity of my country's power system has expanded rapidly, and the consumption of SF6 electrical equipment has increased. The role of SF6 gas in high-voltage electrical equipment is arc extinguishing and insulation. If the density of SF6 gas in high-voltage electrical equipment is reduced and the content of micro water exceeds the standard, it will seriously affect the safe operation of SF6 high-voltage electrical equipment: 1) SF6 gas density is reduced to a certain extent Will lead to loss of insulation and arc extinguishing performance. 2) With the participation of some metals, SF6 gas can undergo hydrolysis reaction with water at a high temperature of 200℃ or higher to generate active HF and SOF ₂ , corrode insulating parts and metal parts, and generate a lot of heat, which will increase the pressure of the gas chamber. high. 3) When the temperature drops, too much moisture may form condensation, which will significantly reduce the insulation strength of the surface of the insulator, or even flashover, causing serious harm. Therefore, the power grid operation regulations compulsorily stipulate that the density and water content of SF6 gas must be regularly tested before and during the operation of the equipment. In addition, the oil-filled electric contact density relays that are currently used in large quantities, from the actual operating conditions, air leakage at the observation window (watch glass) of these density relays is very common, which seriously affects the safety and reliability of the system. The performance of leaked density relays will be greatly reduced. At the same time, the leaked oil will affect the reliable operation of electrical equipment, and needs to be discovered and dealt with in time.

With the development of unmanned substations in the direction of networking and digitization, and the increasing requirements for remote control and remote measurement, the online monitoring of the gas density and micro water content status of SF6 electrical equipment has important practical significance. With the continuous development of China's smart grid, smart high-voltage electrical equipment, as an important part and key node of smart substations, plays a decisive role in the security of smart grids. High-voltage electrical equipment is currently mostly SF6 gas insulated equipment. If the gas density is reduced (caused by leakage, etc.), it will seriously affect the electrical performance of the equipment and cause serious hidden dangers to safe operation. At present, online monitoring of gas density values in SF6 high-voltage electrical equipment has become very common, and the application of gas density monitoring systems (gas density relays) will flourish. The prior art gas density monitoring system (gas density relay) is basically: 1) The remote transmission type SF6 gas density relay is used to realize the collection and upload of density, pressure and temperature, so as to realize online gas density monitoring. 2) Use gas density transmitter to realize the collection and upload of density, pressure and temperature, and realize online monitoring of gas density. SF6 gas density relay is the core and key component, and remote SF6 gas density relay or gas density transmitter is the core and key component. How to ensure its normal operation is very important. 3) The performance of leaking density relays will be greatly reduced. At the same time, the leaked oil will affect the reliable operation of electrical equipment. Online monitoring is required for timely detection and treatment.

Therefore, it is very necessary to develop a gas density relay (or gas density monitoring device) for intelligent monitoring of the whole life cycle, which can be used in a gas density monitoring system based on the ubiquitous power Internet of Things to achieve maintenance-free, improve efficiency and ensure safety .

Summary of the invention

The present invention provides a gas density relay (or gas density monitoring device) used for high-voltage or medium-voltage electrical equipment with full life cycle intelligent monitoring and an implementation method thereof, which is used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment At the same time, it also completes the online gas leakage performance monitoring of the gas density relay, which improves efficiency, does not require maintenance, reduces operation and maintenance costs, and ensures the safe operation of the power grid.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

The first aspect of this application discloses a gas density relay for intelligent monitoring of the whole life cycle, including: a gas density relay body, an online verification unit, an oil leakage diagnostic detector and an intelligent control unit; wherein,

The gas density relay body contains anti-vibration oil;

The online verification unit includes a gas density detection sensor, a pressure adjustment mechanism, a valve, and an online verification contact signal sampling unit; the gas path of the pressure adjustment mechanism is in communication with the gas density relay body, and the pressure adjustment mechanism is It is configured to adjust the pressure rise and fall of the gas density relay body to make the gas density relay body generate a contact signal action; the gas density detection sensor communicates with the gas density relay body on the gas path; the online verification contact The signal sampling unit is directly or indirectly connected to the gas density relay body, and is configured to sample the contact signal of the gas density relay body; one end of the valve is provided with an air inlet communicating with electrical equipment, and The other end of the valve is connected to the gas path of the gas density relay body, or the other end of the valve is connected to the gas path of the pressure regulating mechanism, thereby connecting the valve to the gas path of the gas density relay body Pass;

The oil leakage diagnostic detector is set inside or outside the gas density relay body, and is used to collect oil leakage information of the gas density relay body;

The intelligent control unit is respectively connected with the oil leakage diagnosis detector, the pressure adjustment mechanism, the gas density detection sensor and the online verification contact signal sampling unit, and receives and/or calculates the oil leakage The data and/or information monitored by the diagnostic detector completes the control of the pressure adjustment mechanism, pressure value collection and temperature value collection, and/or gas density value collection, and detection of the contact signal action value of the gas density relay body and / Or the return value of the contact signal.

The above-mentioned gas density relay for intelligent monitoring of the whole life cycle refers to the design of its constituent elements into an integrated structure; and a gas density monitoring device for intelligent monitoring of the whole life cycle refers to the design of its constituent elements in a body structure and flexible composition.

Preferably, the contact signal includes alarm and/or lockout.

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 bimetallic and gas-compensated hybrid gas density relay; a completely mechanical gas density relay, Digital gas density relay, mechanical and digital combined gas density relay; gas density relay with pointer display, digital gas density relay, 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: a housing, and a base, a pressure detector, a temperature compensation element, and at least one signal generator arranged in the housing; wherein, the signal generator includes a micro switch Or magnetically-assisted electrical contacts, the gas density relay body outputs a contact signal through the signal generator; the pressure detector includes a Baden tube or a bellows; the temperature compensation element adopts a temperature compensation sheet or a closed housing gas.

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

More preferably, the pressure regulating mechanism and the valve are an assembly, and the pressure regulating mechanism includes: a gas chamber provided with a first interface communicating with the gas path of the gas density relay body, and The second interface of the valve that is connected to the air outlet of the valve in a sealed manner, the relative positions of the first interface and the second interface are staggered; the air chamber is provided with a pressure changing member, and the pressure changing member is in sealing contact with the inner wall of the air chamber , And the pressure changing member is provided with a push rod on the side facing the second interface; the pressure changing member is connected to the driving member through the connecting member, and the driving member drives the connecting member to drive the pressure changing member and the The push rod moves in the gas chamber to control the opening or closing of the valve; the gas pressure in the gas chamber changes with the position of the pressure changing member;

The valve includes a valve body, the valve body is provided with an air inlet connected to an electrical device and an air outlet connected to a pressure regulating mechanism along its axial direction, and a cavity inside the valve body is provided with a valve core assembly The valve core assembly includes a circlip, an elastic member and a valve core, one end of the elastic member is fixedly connected to the air inlet through the circlip, the other end of the elastic member is fixedly connected to one end of the valve core, and the valve The other end of the core penetrates the air outlet, extends into the air chamber from the second interface of the pressure regulating mechanism, and is arranged directly opposite to the push rod, and there is a gap between the valve core and the push rod The valve core is sealed with the inner wall of the valve body under the action of the elastic member, and blocks the air inlet and outlet of the valve.

Further, the push rod pushes the valve core to move in the direction of the air inlet in the cavity of the valve body, the valve core is separated from the valve body, and the elastic member is in a compressed state. The air inlet of the valve communicates with the air outlet.

Further, the valve core includes a valve stem and a valve flap, the valve flap is fixed on the valve stem; the inner wall of the valve body is provided with a funnel-shaped inclined surface, the valve flap is tapered, and the outer surface of the valve flap It is sealed and connected to the inclined surface of the inner wall of the valve body to block the air inlet and the air outlet of the valve.

Further, one end of the air chamber of the pressure adjusting mechanism is provided with a third interface, one end of the connecting member is connected to the pressure changing member, and the other end passes through the third interface to connect to the driving component.

Further, the pressure adjusting mechanism further includes a sealing coupling, one end of the sealing coupling is in sealing connection with the third interface, and the other end of the sealing coupling is in sealing connection with the driving end of the driving component, or The sealing coupling piece seals and wraps the connecting piece and the driving component in the sealing coupling piece; preferably, the sealing coupling piece includes one of a bellows, a sealing airbag, and a sealing ring.

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

Further, the drive components include a magnetic drive mechanism, a motor (such as an electric push rod motor, a stepping motor), a reciprocating motion mechanism, a Carnot cycle mechanism, an air compressor, a compressor, an air release valve, a pressure generating pump, and a booster. One of pressure pump, booster valve, electric air pump, electromagnetic air pump, pneumatic components, magnetic coupling thrust mechanism, heating generating thrust mechanism, electric heating generating thrust mechanism, and chemical reaction generating thrust mechanism.

Further, the elastic member is a return spring.

Further, the pressure changing member and the connecting member are integrated in design, and are directly connected to the driving member; or, the pressure changing member is associated with the driving member through a magnetic coupling.

Further, the valve body is provided with a seal that is hermetically connected to the pressure regulating mechanism; and/or the valve body is provided with a seal that is hermetically connected to electrical equipment; and/or the valve core is provided with a seal A seal that connects the inner wall of the valve body.

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

Preferably, the oil leakage diagnostic detector includes one of a liquid level transmitter, a liquid level sensor, a liquid level controller, a liquid level switch, a liquid level gauge, a pressure sensor, a temperature sensor, a camera, a test paper, and a chemical change reagent. Kind or several kinds.

More preferably, the oil leakage diagnosis detector is a liquid level transmitter, a liquid level sensor or a liquid level gauge, and the oil leakage diagnosis detector is arranged in the gas density relay body, and is used to collect information in the gas density relay body. Liquid level, when the liquid level in the gas density relay body is lower and/or higher than the set liquid level, the intelligent control unit sends out an oil leakage alarm signal and/or information.

More preferably, the oil leakage diagnostic detector is a liquid level controller or a liquid level switch, and when the gas density relay body leaks oil to a set value, the liquid level controller or the liquid level switch issues an oil leakage alarm Signal and/or information, the oil spill alarm signal and/or information are 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 collects the pressure signal in the gas density relay body or the pressure within a preset time. The change value is uploaded 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 issues an oil leakage alarm Signal and/or information.

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

The intelligent control unit receives the temperature signal T1 collected by the first temperature sensor and the temperature signal T2 collected by the second temperature sensor. If the temperature difference |T1-T2|≤the preset threshold, the intelligent control unit issues an oil leakage alarm Signal and/or information; or,

The intelligent control unit generates a corresponding first temperature curve for display and storage according to the received temperature information collected by the first temperature sensor, and generates a corresponding second temperature curve for display according to the received temperature information collected by the second temperature sensor , Save, judge the first temperature curve and the second temperature curve, in the same time period, when the change trends of the first temperature curve and the second temperature curve are consistent or tend to be the same, the intelligent control unit sends out Oil spill 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 arranged below the oil surface in the gas density relay body and located at different heights. ；

The smart control unit receives the temperature signal T1 collected by the first temperature sensor and the temperature signal T2 collected by the second temperature sensor. If the temperature difference |T1-T2| exceeds a preset temperature change threshold, the smart control unit sends Oil spill warning signal and/or information; or,

The intelligent control unit generates a corresponding first temperature curve for display and storage according to the received temperature information collected by the first temperature sensor, and generates a corresponding second temperature curve for display according to the received temperature information collected by the second temperature sensor , Save, judge the first temperature curve and the second temperature curve, in the same time period, when the change trend of the first temperature curve and the second temperature curve is inconsistent or the inconsistency trend is more obvious, smart The control unit sends out an oil leakage alarm signal and/or information.

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

The intelligent control unit calculates the difference between the received temperature value T1 sampled in the current time interval and the temperature value T2 collected in the adjacent previous time interval. If the temperature difference |T1-T2| exceeds the preset The temperature change threshold, the intelligent control unit sends out an oil leakage alarm signal and/or information; or,

The intelligent control unit generates a corresponding temperature curve for display and storage according to the received temperature information collected by a temperature sensor located below the oil level, and judges the temperature curve according to preset information, and when it is judged that the temperature curve is abnormal Oil spill alarm signal and/or information is issued at the time.

More preferably, the oil leakage diagnostic detector is a camera, and the camera is arranged outside the gas density relay body; the camera obtains abnormal information of the gas density relay through image recognition technology, and sends an oil leakage alarm signal through the intelligent control unit And/or information; wherein the abnormal information obtained by the camera includes one of oil leakage, water ingress, rust, foreign matter intrusion, blurred dial, rubber aging, rubber fracture, device damage, device falling, and device jamming. Or several.

More preferably, the oil leakage diagnostic detector includes a camera and test paper, the camera and test paper are arranged outside the gas density relay body; when the gas density relay leaks oil, the test paper reacts with the oil and changes color, or The surface of the test paper is coated with a protective coating. After the oil leaks, the oil dissolves the protective coating, exposing the test paper, and the test paper reacts with the reaction gas in the air to change color; the camera acquires the image of the discolored test paper through image recognition technology, Obtain the abnormal information of the gas density relay, and send out the oil leakage alarm signal and/or information through the intelligent control unit; wherein the abnormal information obtained by the camera includes oil leakage, water ingress, rust, foreign matter intrusion, blurred dial, and rubber aging , Rubber fracture, device damage, device falling, device stuck one or more of them.

More preferably, the oil leakage diagnostic detector includes a camera and a chemical change reagent, the camera and the chemical change reagent are arranged outside the gas density relay body; when the gas density relay has oil leakage, the chemical change reagent changes color, The camera acquires the discolored chemical change reagent image through the image recognition technology, acquires the abnormal information of the gas density relay, and sends out the oil spill alarm signal and/or information through the intelligent control unit or the background; wherein, the abnormal information acquired by the camera includes One or more of oil leakage, water ingress, rust, foreign matter intrusion, blurred dial, rubber aging, rubber fracture, device damage, device falling, and device jamming.

The above-mentioned camera can be moved and/or rotated to perform multi-angle photography.

Preferably, the gas density detection sensor includes at least one pressure sensor and at least one temperature sensor; or, a gas density transmitter composed of a pressure sensor and a temperature sensor is used; or, a density detection sensor using quartz tuning fork technology.

More preferably, the pressure sensor is installed on the gas path of the gas density relay body; the temperature sensor is installed on or outside the gas path of the gas density relay body, or installed in the gas density relay body , Or installed outside the body of the gas density relay.

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

More preferably, the pressure sensor may also be a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil induction pressure sensor (such as a pressure sensor with an induction coil attached to a Baden tube), a resistance pressure sensor (such as a Baden tube). Pressure sensor with sliding wire resistance); it can be an analog pressure sensor or a digital pressure sensor.

Preferably, the gas density relay (or gas density monitoring device) further includes: a sealing performance detection unit, and the sealing performance detection unit includes an oxygen sensor and/or a nitrogen sensor, and the oxygen sensor and/or nitrogen sensor are arranged in the gas In the housing of the density relay body; or, the sealing performance detection unit includes an oxygen sensor and/or a nitrogen sensor and a gas hood, and the gas hood is arranged on the outside of the gas density relay body and is connected to the housing Communicated with each other, the gas hood and the casing together form a cavity, the oxygen sensor and/or the nitrogen sensor are arranged in the gas hood; the intelligent control unit monitors the casing through the oxygen sensor and/or the nitrogen sensor When the oxygen concentration and/or nitrogen concentration in the body, the monitored oxygen concentration and/or nitrogen concentration are lower than the preset threshold value, the intelligent control unit sends out a leak alarm signal and/or information, or the monitored oxygen When the concentration and/or nitrogen concentration are lower than the normal oxygen concentration and/or nitrogen concentration, the intelligent control unit sends out a gas leak alarm signal and/or message; or,

The sealing performance detection unit includes an SF6 diagnostic sensor, which is arranged in the housing of the gas density relay body; or, the sealing performance detection unit includes an SF6 diagnostic sensor and a gas hood, and the gas hood is arranged on the gas density relay. The outside of the body is connected with the housing of the gas density relay body, the gas hood and the housing form a cavity together, and the SF6 diagnostic sensor is arranged in the gas hood; the intelligent control The unit monitors the SF6 gas concentration in the shell through the SF6 diagnostic sensor. When the monitored SF6 gas concentration is higher than the set preset threshold, the intelligent control unit sends out a gas leak alarm signal and/or information, or the monitored SF6 gas When the concentration is higher than the normal SF6 gas concentration, the intelligent control unit sends out a gas leakage alarm signal and/or information.

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

More preferably, it further includes an air leakage shut-off piece and a contact isolation unit, wherein the intelligent control unit is respectively connected to the air leakage shut-off piece and the contact isolation unit; one end of the air leakage shut-off piece is connected to electrical equipment, The other end of the air leakage shut-off member is connected to the gas density relay body; the air leakage shut-off member is configured to close the electrical equipment and the gas density relay body when the sealing performance of the gas density relay body has problems Connected gas circuit; the contact isolation unit is also directly or indirectly connected to the gas density relay body, and is configured to make the contact and the contact signal of the gas density relay body when the gas leakage shutoff is closed The control loop is not connected.

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

Further, it also includes an equipment-side gas density detection sensor, the equipment-side gas density detection sensor is arranged on the side where the air leakage shutoff is connected to the electrical equipment, and the equipment-side gas density detection sensor is connected to the intelligent control unit , Is configured to monitor the gas density value P _{SB20 of} electrical equipment;

The contact isolation unit includes an isolation connection circuit, and the isolation connection circuit connects the contact of the gas density relay body with a contact signal control circuit;

_{When the gas leakage shutoff is closed, if the gas density value P SB20} of the electrical device monitored by the gas density detection sensor on the device side is greater than the preset threshold, the contact isolation unit cuts off the isolation connection circuit to make the gas density relay body _{If the gas density value P SB20} of the electrical device monitored by the gas density detection sensor on the device side is less than or equal to the preset threshold, the isolation connection circuit is closed to make the gas density relay body The contact is connected with the contact signal control circuit.

Preferably, the online verification contact signal sampling unit includes a first connection circuit and a second connection circuit, the first connection circuit is connected to the contact of the gas density relay body and the contact signal control circuit, and the second connection circuit Connecting the contact point of the gas density relay body and the intelligent control unit;

In the non-verification state, the second connection circuit is disconnected and the first connection circuit is closed; in the verification state, the online verification contact signal sampling unit cuts off the first connection circuit and connects to the The second connection circuit connects the contact point of the gas density relay body with the intelligent control unit.

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

In the non-calibration 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; in the verification state, the normally closed contact is opened, The normally open contact is closed, and the contact of the gas density relay body is connected to the intelligent control unit through the normally open contact.

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

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

In the verification state, the normally closed contact is opened, the normally open contact is opened, the second normally open contact is closed, and the constant current source and the amplifier are connected in parallel to the contact of the gas density relay body Above, the contact of the gas density relay body is connected to the intelligent control unit through the second normally open contact, an amplifier and an A/D converter.

Furthermore, the contact of the gas density relay body and its control loop are isolated by an online check contact signal sampling unit, and when the contact signal of the gas density relay body is activated, and/or when an instruction to detect the contact resistance of the contact is received , The contact resistance detection unit can detect the contact resistance value of the contact of the gas density relay body.

Furthermore, the intelligent control unit or the background evaluates the contact life of the gas density relay body or predicts the life of the gas density relay body based on the monitored contact resistance value.

Further, the gas density relay (or gas density monitoring device) further includes an insulation performance detection unit, and the insulation performance detection unit includes a fourth relay, a voltage exciter, a current detector, an amplifier, and an A/D converter; Wherein, the fourth relay includes a third normally open contact; the contact of the gas density relay body is connected to one end of the voltage exciter through the third normally open contact, the other end of the voltage exciter is grounded through the current detector, and the amplifier is connected in parallel to the current At both ends of the detector, the A/D converter is connected in series between the output terminal of the amplifier and the intelligent control unit;

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

In the verification state, the normally closed contact is opened, the normally open contact is opened, the third normally open contact is closed, and the voltage exciter and current detector are connected in series to the contact of the gas density relay body Above, the contact of the gas density relay body is connected to the intelligent control unit through the third normally open contact, voltage exciter, amplifier and A/D converter.

Furthermore, the contact of the gas density relay body and its control circuit are isolated by an online verification contact signal sampling unit, and when the contact signal of the gas density relay body is activated, and/or when an instruction to detect insulation performance is received, The insulation performance testing unit performs insulation performance testing on the gas density relay body.

Preferably, the gas density relay (or gas density monitoring device) also has a comparison density value output signal, and the comparison density value output signal is connected to the intelligent control unit; the gas density of the gas density relay body increases or When the gas density value drops 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 the first density value PS20, and the gas density detection sensor collects The gas density value of is the second density value PJ20, and the intelligent control unit and/or background compares the first density value PS20 with the second density value PJ20 to obtain the density difference |PJ20-PS20|; when the density difference |PJ20 -PS20| Within its preset threshold, the current working state of the monitoring part of the gas density relay (or gas density monitoring device) is the normal working state, otherwise, it is the abnormal working state; or,

The gas density relay (or gas density monitoring device) further includes a camera, and the camera obtains the pointer display value or number display value of the gas density relay body through image recognition technology, which is the first density value PZ20, and the gas density detection The gas density value collected by the sensor is the second density value PJ20, and the intelligent control unit and/or the background compares the first density value PZ20 with the second density value PJ20 to obtain the density difference |PJ20-PZ20|; if the density is different If |PJ20-PZ20| is within its preset threshold, the current working state of the monitoring part of the gas density relay (or gas density monitoring device) is a normal working state, otherwise, it is an abnormal working state.

Preferably, the intelligent control unit diagnoses the state of the gas density detection sensor, the number of alarm actions of the gas density relay body, the number of blocking actions of the gas density relay body, the contact misoperation record of the gas density relay body, and the gas One or more of the contact rejection records of the density relay body.

Preferably, the intelligent control unit obtains the gas density value collected by the gas density detection sensor; or, the intelligent control unit obtains the pressure value and temperature value collected by the gas density detection sensor to complete the gas density relay ( (Or gas density monitoring device) online monitoring of the gas density of the monitored electrical equipment.

Preferably, the intelligent control unit obtains the gas density value collected by the gas density detection sensor when the gas density relay body generates a contact signal action or switching, and completes the on-line of the gas density relay (or gas density monitoring device) Check; or,

The intelligent control unit obtains the pressure value and temperature value collected by the gas density detection sensor when the gas density relay body generates a contact signal action or switching, and converts it into a pressure value corresponding to 20°C according to the gas pressure-temperature characteristic, That is, the gas density value completes the online verification of the gas density relay (or gas density monitoring device).

Preferably, the intelligent control unit receives the density value P ₂₀ monitored by the gas density detection sensor, and if the density value P ₂₀ ≤ a preset threshold density value P _20SD , the intelligent control unit or the background sends out a liquefaction notice signal and/or information , And/or notify the time of gas liquefaction, and/or notify the duration of gas liquefaction; or,

The intelligent control unit receives the temperature value T monitored by the gas density detection sensor, and if the temperature value T ≤ the preset threshold temperature value T _SD , the intelligent control unit or the background sends out a liquefaction notice signal and/or information, and/or notice The time of gas liquefaction, and/or the duration of the notice of gas liquefaction; or,

The intelligent control unit receives the pressure value P monitored by the gas density detection sensor, and within the set time period, if the pressure change value △P ≥ the preset threshold pressure change value △P _SD , the intelligent control unit or background sends Liquefaction notice signal and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit receives the pressure value P monitored by the gas density detection sensor. At a specific temperature value T _TD , if the pressure value P ≤ a preset threshold pressure value P _SD , the intelligent control unit or the background sends a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding density curve for display and storage according to the received density value information collected by the gas density detection sensor, judges or diagnoses the density curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding temperature curve for display and storage according to the received temperature value information collected by the gas density detection sensor, judges or diagnoses the temperature curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding pressure curve for display and storage according to the pressure value information collected by the gas density detection sensor, judges or diagnoses the pressure curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction.

Preferably, the intelligent control unit is based on the embedded algorithm and control program of the embedded system of the microprocessor, and automatically controls the entire verification process, including all peripherals, logic, input and output.

More preferably, the intelligent control unit is based on general-purpose computers, industrial computers, ARM chips, AI chips, CPUs, MCUs, FPGAs, PLCs, etc., industrial control motherboards, embedded main control boards and other embedded algorithms and control programs to automatically control the entire The verification process 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 input Analog quantity, digital quantity information.

Preferably, the intelligent control unit further includes a communication module that realizes long-distance 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, the intelligent control unit is further provided with a clock, and the clock is configured to periodically set the monitoring time of the gas density relay body, or record the test time, or record the event time.

Preferably, the intelligent control unit further includes an edge calculation unit that performs in-depth calculation processing on the pressure value, temperature value, and/or gas density value monitored by the gas density detection sensor, and the obtained information and/or monitoring Values include accurate density values P _{20 accurate days} , P _{20 accurate weeks} , P _{20 accurate seasons} , P _{20 accurate months} , P _{20 accurate years} , density values P ₂₀ , pressure values P, temperature values T, ambient temperature values T _environment , Gas internal temperature value T _internal , maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, replenishment time, replenishment quality, air leakage rate L _{air leakage rate year} , L _{air leakage rate season} , L _{air leakage rate month} , One or more of L _{air leakage rate week} and L _{air leakage rate day.}

More preferably, the depth calculation processing includes: the edge calculation unit uses an average value method (average method) to calculate the average value P _{20 average of the} _{gas density value P 20} for the gas density values monitored within the set time interval, The average value P ₂₀ is the accurate density value P _{20 is accurate} ; or, the edge calculation unit _{performs Fourier transform on the gas density value P 20} monitored in the set time interval, converts it into the corresponding frequency spectrum, and converts the period The sex component is filtered out, and then the accurate density value P _{20 is} calculated accurately; among them,

The P ₂₀ corresponds to the gas density value monitored in real time, the P _{20 accurate year} corresponds to the accurate density value of an annual time interval, the P _{20 accurate season} corresponds to the accurate density value of a quarterly time interval, and the P _{20 An accurate month} corresponds to an accurate density value of a monthly time interval, the P _{20 accurate week} corresponds to an accurate density value of a week interval, and the P _{20 accurate day} corresponds to an accurate density value of a day interval.

Further, the average value method is: within a set time interval, set the collection frequency, and perform average calculation processing on all N gas density values at different time points that are collected to obtain a gas density value P ₂₀ Average value P _{20 average} ; or, in the set time interval, set the temperature interval step length, calculate the average value of the density values of N different temperature values collected in the entire temperature range to obtain the gas density value P ₂₀ P _average is the average of _20; or at a set time interval, the set pressure interval step, the collected over the entire pressure range density values of N different pressure values obtained are averaged to give _{The average value P 20} of the gas density value P _{20 is average} ; wherein, N is a positive integer greater than or equal to 1.

Further, the depth calculation processing further includes: the edge calculation unit calculates the air leakage rate L of the monitored electrical equipment, and the air leakage rate L=△P _20t /t=(P _{20 accurate before t-} P _{20 Accurate t} )/t, where: t is the set time interval, △P _20t is the change of the density value in the time interval t, P _{20 before accurate t} is the accurate density value in the previous time interval, P _{20 Accurate t} is the accurate density value in the current time interval; among them,

The L _{air leakage rate year} corresponds to the air leakage rate of an annual time interval, the L _{air leakage rate season} corresponds to the air leakage rate of a quarterly time interval, and the L air leakage rate month corresponds to the _{air leakage rate of a monthly time interval.} , The L _{air leakage rate week} corresponds to an accurate air leakage rate in a one-week interval, and the L _{air leakage rate day} corresponds to an air leakage rate in a one-day interval.

Still further, the depth calculation process further comprising: an edge calculating unit calculates the time qi electrical equipment monitored _time T _qi, _{qi times} the time T qi = (P ₂₀ -P ₂₀ _accurately _{fill Qi} )/L, where P ₂₀ is the density value that needs to be set.

Still further, the depth calculation process further comprises: an edge calculation unit calculates the electrical equipment required to monitor the gas chamber to the total mass _{of the total} Q = ρ gas _needs × V, where, [rho] is the desired quality _required qi density the density of the desired value of qi _qi P ₂₀ and the gas characteristics are, V is the volume of the gas chamber electrical equipment; and Q calculation unit calculates the edge of electrical equipment being monitored current air chamber _{is currently} a gas mass = [rho] _currently × V, where, [rho] is _{the current} density of the current mass of gas, according to the current value of the monitored gas density and gas characteristics P ₂₀ obtained; calculated by the total _{sum of} the current mass of gas Q gas mass calculated _current gas Q The quality of _{supplementary qi, Q supplementary qi} = Q _total- Q _present .

Preferably, the intelligent control unit and the online verification unit can perform online verification of the contacts of the gas density relay body according to the set temperature or/season; the intelligent control unit obtains 20°C, high temperature TH and/or low temperature respectively. When the gas density relay body generates contact signal action or switching during TL, the gas density values P _DT20 , P _DTH20 and/or P _DTL20 collected by the gas density detection sensor complete the gas density relay (or gas density monitoring device) ) Temperature compensation test.

More preferably, the intelligent control unit or the background receives the data of the temperature compensation test, and if the error value |P _DT20 -P _DTH20 | is within its preset threshold, the high temperature temperature compensation of the gas density relay or the gas density monitoring device It is qualified, otherwise, it is unqualified; and/or if the error value (P _DT20 -P _DTH20 )>0, the high temperature temperature compensation of the gas density relay (or gas density monitoring device) is under compensation, otherwise, it is over Make up; or,

The intelligent control unit or the background receives the data of the temperature compensation test. If the error value |P _DBZ20 -P _DTH20 | is within its preset threshold, where P _DBZ20 is the standard contact signal action value, the gas density relay (or gas The high temperature temperature compensation of the density monitoring device is qualified, otherwise, it is unqualified; and/or if the error value (P _DBZ20 -P _DTH20 )>0, the high temperature temperature compensation of the gas density relay (or gas density monitoring device) It is under-compensation, otherwise, it is over-compensation; or,

The intelligent control unit or the background receives the data of the temperature compensation test. If the error value |P _DT20 -P _DTL20 | is within its preset threshold, the low temperature temperature compensation of the gas density relay or gas density monitoring device is qualified, otherwise , Is unqualified; and/or if the error value (P _DT20 -P _DTL20 )>0, the low temperature compensation of the gas density relay (or gas density monitoring device) is over compensation, otherwise, it is under compensation; or,

The intelligent control unit or the background receives the temperature compensation test data, if the error value |P _DBZ20 -P _DTL20 | is within its preset threshold, where P _DBZ20 is the standard contact signal action value, the gas density relay (or gas density The low temperature temperature compensation of the monitoring device) is qualified, otherwise, it is unqualified; and/or if the error value (P _DBZ20 -P _DTL20 )>0, the low temperature temperature compensation of the gas density relay (or gas density monitoring device) is Over-compensation, otherwise, it is under-compensation.

Preferably, the control of the intelligent control unit is through on-site control and/or through background control.

Preferably, at least two of the gas density relays (or gas density monitoring devices) are connected to a remote background detection system through communication equipment; wherein, the gas density relays (or gas density monitoring devices) are arranged in the corresponding gas chambers. In electrical equipment, the communication methods of the communication equipment include wired communication and wireless communication.

More preferably, the wired communication mode includes one of RS232 bus, RS422 bus, RS485 bus, CAN-BUS bus, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier, and cable Or several.

More preferably, the wireless communication method includes a built-in sensor 5G/NB-IOT communication module (such as 5G, NB-IOT), 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, One or more of sound waves, satellites, light waves, quantum communications, and sonar.

Preferably, at least two of the gas density relays (or gas density monitoring devices) are connected to a remote background detection system through a hub and a protocol converter in turn; wherein, the gas density relays (or gas density monitoring devices) are arranged in the Corresponding to the electrical equipment of the air chamber.

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

The second aspect of the present application discloses a gas density monitoring system for intelligent monitoring of the whole life cycle. The gas density monitoring system includes the above-mentioned gas density relay (or gas density monitoring device) for intelligent monitoring of the whole life cycle.

The third aspect of this application discloses a method for implementing a gas density relay with intelligent monitoring throughout its life cycle, including:

Connecting the gas path of the pressure regulating mechanism with the gas density relay body, the pressure regulating mechanism regulates the pressure rise and fall of the gas density relay body, so that the gas density relay body generates a contact signal action;

Connect the gas density detection sensor with the gas density relay body on the gas path;

Connect the online verification contact signal sampling unit directly or indirectly to the gas density relay body, and the online verification contact signal sampling unit samples the contact signal when the gas density relay body generates a contact signal action;

Connect one end of the valve to electrical equipment, connect the other end of the valve to the gas density relay body, or connect the other end of the valve to the gas circuit of the pressure regulating mechanism, thereby connecting the valve to the gas density relay body;

Install the oil leakage diagnostic detector inside or outside the gas density relay body to collect oil leakage information of the gas density relay body;

Connect the intelligent control unit to the oil leakage diagnostic detector, the pressure adjustment mechanism, the gas density detection sensor and the online verification contact signal sampling unit, respectively, and the intelligent control unit receives and/or calculates the The data and/or information monitored by the oil leakage diagnostic detector completes the control of the pressure adjustment mechanism, pressure value collection, temperature value collection, and/or gas density value collection, and detection of the contact signal action of the gas density relay body Value and/or contact signal return value.

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

The sealing performance detection unit is arranged inside or outside the body of the gas density relay, and is connected to the gas circuit in the body of the gas density relay, or is connected to the housing of the gas density relay body, and the intelligent control unit is connected to the sealing The performance detection unit is connected;

The intelligent control unit receives and/or calculates the data and/or information monitored by the sealing performance detection unit and performs a diagnosis to obtain the current gas leakage state of the gas density relay body; or, the data to be received by the intelligent control unit And/or the information is uploaded to the backstage, and the backstage diagnoses the data and/or information monitored by the sealing performance detection unit received and/or calculated, and obtains the current gas leakage state of the gas density relay body.

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

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

1) Provide a gas density relay with intelligent monitoring of the whole life cycle, which is used to monitor the gas density of gas-insulated or arc-extinguishing electrical equipment, and at the same time complete the on-line oil leakage and/or gas leakage performance of the gas density relay Monitoring improves efficiency and does not require maintenance. The intelligent management and control of the entire life cycle of the density relay is realized, which reduces the operation and maintenance costs and ensures the safe operation of the power grid.

2) Provide a method for realizing a gas density relay with intelligent monitoring of the whole life cycle, which can support the normal operation of the above-mentioned gas density relay with intelligent monitoring of the whole life cycle.

Description of the drawings

The drawings constituting a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Fig. 1 is a structural schematic diagram of the working state of the gas density relay intelligently monitored throughout the life cycle of the first embodiment;

2 is a schematic diagram of the verification state structure diagram of the gas density relay for intelligent monitoring of the whole life cycle of the first embodiment;

3 is a schematic diagram of the circuit principle of the gas density relay with intelligent monitoring of the whole life cycle of the first embodiment;

FIG. 4 is a schematic diagram of the circuit principle of the gas density relay for intelligent monitoring of the whole life cycle of the first embodiment;

FIG. 5 is a schematic diagram of the structure of the gas density relay body for intelligent monitoring of the whole life cycle of the first embodiment;

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

FIG. 7 is a schematic diagram of the structure of the gas density relay body for intelligent monitoring of the whole life cycle of the third embodiment;

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

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

10 is a schematic diagram of the structure of the gas density relay body for intelligent monitoring of the whole life cycle of the sixth embodiment;

11 is a schematic diagram of the structure of the gas density relay body for intelligent monitoring of the whole life cycle of the seventh embodiment;

12 is a schematic diagram of the structure of the gas density relay body for intelligent monitoring of the whole life cycle of the eighth embodiment;

Figures 13-15 are schematic diagrams of a gas density monitoring system with intelligent monitoring throughout its life cycle.

Detailed ways

In order to make the objectives, technical solutions, and effects of the present invention clearer and clearer, the following will further describe in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

Example one:

Figures 1 to 2 are schematic diagrams of the structure of a gas density relay used for high- and medium-voltage electrical equipment and intelligently monitored throughout its life cycle according to the first embodiment of the present invention. The gas density relay for intelligent monitoring of the whole life cycle includes: the gas density relay body with anti-vibration oil, the online calibration unit (including the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure regulating mechanism 5, and the online calibration contact signal sampling Unit 6), intelligent control unit 7, oil leakage diagnosis detector 10, sealing performance detection unit 11 and contact resistance detection unit 6B (not shown in the figure). Among them, 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 set on the gas density relay body 1, and the contact resistance detection unit 6B and The online verification contact signal sampling unit 6 is set together; the intelligent control unit 7 is connected to the gas density detection sensor (pressure sensor 2, temperature sensor 3), the pressure adjustment mechanism 5, and the online verification contact respectively. The signal sampling unit 6, the oil leakage diagnosis detector 10 and the sealing performance detection unit 11 are connected; one end of the valve 4 is provided with an air inlet communicating with the electrical equipment 8, and the other end of the valve 4 is connected to the pressure The gas path of the mechanism 5 is adjusted to connect the valve 4 with the gas path of the gas density relay body 1. In this embodiment, the gas density relay body 1 is arranged on the first interface 506 of the pressure regulating mechanism 5, the valve 4 is a check valve, and the valve 4 and the pressure regulating mechanism 5 are a combined body. The valve 4 is closed or opened under the control of the pressure adjusting mechanism 5. At the same time, 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 unlock the contact signal action.

Figure 1 is a schematic diagram of the working status of a gas density relay (or gas density monitoring device) with intelligent monitoring throughout its life cycle, and Figure 2 is the calibration of a gas density relay (or gas density monitoring device) with intelligent monitoring throughout its life cycle State diagram.

Specifically, the pressure adjustment mechanism 5 includes: a pressure adjustment mechanism housing 5B, a gas chamber 501, and the gas chamber 501 is provided with a first interface 506 communicating with the gas path of the gas density relay body 1, and The second interface 507 of the air outlet 4A of the valve 5 is hermetically connected, and the relative positions of the first interface 506 and the second interface 507 are staggered; the air chamber 501 is provided with a pressure changing member 502 (this embodiment For example, a piston), the pressure changing member 502 is in sealing contact with the inner wall of the air chamber 501 through a sealing member 503, and the pressure changing member 502 is provided with a push rod 5S on the side facing the second interface 507; the pressure changing member 502 faces away from the air One side of the chamber 501 is connected to the movement mechanism 5D and the driving part 505 through a connecting piece 504, or the pressure changing part 502 is directly connected to the driving part 505. The driving component 505 drives the connecting member 504 to drive the pressure changing member 502 and the push rod 5S to move in the gas chamber 501 to control the opening or closing of the valve 4; the gas pressure in the gas chamber 501 It changes as the position of the pressure changing member 502 changes. The driving component 505 and the movement mechanism 5D may include, but are not limited to, a magnetic drive mechanism, a motor (such as an electric push rod motor, a stepper motor), a reciprocating mechanism, a Carnot cycle mechanism, an air compressor, a compressor, and a bleed valve , Pressure pump, booster pump, booster valve, electric air pump, electromagnetic air pump, pneumatic components, magnetic coupling thrust mechanism, heating generating thrust mechanism, electric heating generating thrust mechanism, chemical reaction generating thrust mechanism. Heating the thrust generating mechanism, such as heating the bimetal, will generate thrust. The push rod 5S can also generally refer to a pushing member 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 member 504 is connected to the pressure changing member 502, and the other end passes through the third interface to connect to the driving component 505. The pressure regulating mechanism 5 further includes a sealing coupling 508, one end of the sealing coupling 508 is in sealing connection with the third interface, and the other end of the sealing coupling 508 is in sealing connection with the driving end of the driving component 505, or the sealing coupling A piece 508 seals and wraps the connecting piece 504 and the driving component 505 in the sealed coupling piece 508. The sealing coupling 508 may be a bellows, or a sealing air bag, or a sealing ring. In this embodiment, the sealing coupling 508 is a bellows.

The valve 4 includes a valve body 404 which is provided with an air inlet 4B connected to the electrical equipment 8 and an air outlet 4A connected to the pressure regulating mechanism 5 along its axial direction. The cavity inside the valve body 404 is provided with a valve core assembly, which includes a circlip 405, an elastic member 403 (return spring in this embodiment) and a spool 401. One end of the elastic member 403 is connected to the valve core through the circlip 405. The air inlet 4B is fixedly connected, the other end of the elastic member 403 is fixedly connected to one end of the valve core 401, and the other end of the valve core 401 penetrates the air outlet 4A and extends into the second interface 507 of the pressure regulating mechanism 5. The air chamber 501 is arranged directly opposite to the push rod 5S. During verification, there is a gap between the valve core 401 and the push rod 5S, and the valve core 401 is sealed to the inner wall of the valve body 404 under the action of the elastic member 403 to block the air inlet 4B and the air outlet 4A of the valve 4 . In this embodiment, the other end of the valve core 401 penetrates the air outlet 4A, but does not extend into the air chamber 501 from the second interface 507 of the pressure regulating mechanism 5. In the normal working state, the valve core The valve core 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 connected.

The valve core 401 includes a valve stem and a valve flap, and the valve flap is fixed on the valve stem; the inner wall of the valve body 404 is provided with a funnel-shaped inclined surface, and the valve flap is tapered. The shape of the spool 401 can also be designed flexibly, using existing self-sealing valve technology, such as rubber vulcanization, or the use of non-return balls, steel balls, etc. As shown in FIG. 1, in the normal working state, the push rod 5S of the pressure regulating mechanism 5 pushes the valve core 401 to move in the cavity of the valve body 404 in the direction of the air inlet 4B, and the elastic member 403 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 of the valve 4 is in communication with the air outlet 4A, that is, the valve 4 is in an open state . As shown in Figure 2, during verification, the outer surface of the valve flap is connected to the inclined surface of the inner wall of the valve body 404 through a sealing ring 402 to block the air inlet 4B and the air outlet 4A of the valve 4, that is, the Valve 4 is in the closed state.

In addition, the valve body 404 is provided with

seals

407 and 5M that are hermetically connected to the pressure regulating mechanism 5, and the valve body 404 is provided with a seal 406 that is hermetically connected to the electrical device 8. The above-mentioned sealing member may be any one of a rubber ring, a rubber pad, or an O-ring.

The above-mentioned gas density relay body 1 can be: a gas density relay with bimetallic strip compensation, a gas-compensated gas density relay with gas compensation, or a gas density relay with a mixture of bimetallic strip and gas compensation; a fully mechanical gas density relay, digital type Gas density relay, mechanical and digital combination type gas density relay; density relay with indicator (density relay with pointer display, density relay with digital display, density relay with liquid crystal display), density relay without indicator (ie density switch ); SF6 gas density relay, SF6 mixed gas density relay, N2 gas density relay, other gas density relays, etc.

The type of the aforementioned pressure sensor 2 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 induction pressure sensor (such as a pressure measurement sensor with an induction coil on a Baden tube), and a resistance pressure sensor (such as a slip wire resistance with a Baden tube) The pressure measurement sensor); it can be an analog pressure sensor or a digital pressure sensor. Pressure collection is a variety of pressure-sensitive components such as pressure sensors and pressure transmitters, such as diffused silicon type, sapphire type, piezoelectric type, strain gauge type (resistance strain gauge type, ceramic strain gauge type).

The above-mentioned temperature sensor 3 may be a thermocouple, a thermistor, or a semiconductor type; it may be a contact type or a non-contact type; it may be a thermal resistance or a thermocouple. In short, temperature collection can use various temperature sensing elements such as temperature sensors and temperature transmitters.

The aforementioned intelligent control unit 7 (as shown in FIG. 3) includes a processor 71 (U1) and a power supply 72 (U2). The processor 71 (U1) can be a general-purpose computer, an industrial computer, a CPU, a single-chip microcomputer, an ARM chip, an AI chip, an MCU, an FPGA, a PLC, etc., an industrial control board, an embedded main control board, etc., and other intelligent integrated circuits. The power supply 72 (U2) can be a switching power supply, AC 220V, DC power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery, electric field induction power supply, magnetic field induction power supply, wireless charging power supply, capacitor power supply, etc. The basic requirement or function of the intelligent control unit 7 is: in the working state, the intelligent control unit 7 obtains the gas density value collected by the gas density detection sensor; or the intelligent control unit 7 obtains the gas density detection sensor (pressure sensor 2 and temperature). The pressure value and temperature value collected by the sensor 3) complete the on-line monitoring of the gas density of the monitored electrical equipment by the gas density relay, without the need to manually go to the scene to read the display value of the gas density relay body 1. During calibration, the intelligent control unit 7 completes the control and signal acquisition of the pressure regulating mechanism 5 to close the valve 4, and then isolates the gas path of the gas density relay body 1 and the electrical equipment 8 during the calibration, and the gas density relay can be detected The pressure value and temperature value when the contact signal of the main body 1 is activated are converted into the corresponding pressure value P ₂₀ _{(density value) at 20 ℃, that is, the contact action value P D20 of the} gas density relay main body 1 can be detected to complete the gas Calibration work of density relay body 1. Alternatively, the intelligent control unit 7 can directly detect the density value P _D20 when the contact signal of the gas density relay body 1 is activated, and complete the verification work of the gas density relay body 1. At the same time, the intelligent control unit 7 can also complete the self-calibration between the gas density relay body 1, the pressure sensor 2, and the temperature sensor 3 through the test of the rated pressure value of the gas density relay body 1, thereby achieving maintenance-free.

The above-mentioned online verification contact signal sampling unit 6 is controlled by the contact signal interlocking part 5K, and mainly completes the contact signal sampling of the gas density relay body 1. That is, the basic requirements or functions of the online calibration contact signal sampling unit 6 are: 1) During calibration, the safe operation of electrical equipment will not be affected, that is, when the contact signal of the gas density relay body 1 is activated during calibration, it will not affect Safe operation of electrical equipment; 2) The contact signal control circuit of the gas density relay body 1 does not affect the performance of the gas density relay, especially the performance of the intelligent control unit 7, and will not damage the gas density relay or affect the test work .

As shown in Figure 1 and Figure 2, the working principle of a gas density relay (or gas density monitoring device) that is intelligently monitored throughout its life cycle: in the working state, the intelligent control unit 7 monitors the electrical According to the gas pressure and temperature of the equipment, the corresponding 20°C pressure value P ₂₀ (that is, the gas density value, that is, the on-line monitoring gas density value) is obtained. The push rod 5S of the pressure regulating mechanism 5 pushes the valve core 401 to move in the cavity of the valve body 404 in the direction of the air inlet 4B, the elastic member 403 is in a compressed state, and the valve of the valve core 401 The outer surface of the flap is separated from the inner wall of the valve body 404, and the air inlet 4B of the valve 4 communicates 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 It communicates with the gas path of the gas density relay body 1 and the electrical equipment 8.

When it is necessary to calibrate the gas density relay body 1, if the gas density value P ₂₀ ≥ the set safety calibration density value P _S ; the gas density relay (or gas density monitoring device) will issue an instruction, that is, through the intelligent control unit 7 Drive the drive component 505 and the movement mechanism 5D of the pressure regulating mechanism 5, the drive component 505 and the movement mechanism 5D drive the connecting piece 504 to move to the right, and then the pressure change piece 502 and the seal 503 move to the right (away from the valve 4) ,as shown in picture 2. And during the movement, the push rod 5S is far away from the valve core 401 of the valve 4, and the valve core 401 moves to the right under the action of the elastic member 403, and the outer surface of the valve disc is sealed and connected to the inclined surface of the inner wall of the valve body 404 through the sealing ring 402. , Block the air inlet 4B and the air outlet 4A of the valve 4, automatically close the gas path, and then shut off the gas path of the gas density relay body 1 and the electrical equipment 8, and complete the online verification of the contact through the contact signal interlocking piece 5K The signal sampling unit 6 cuts off the control circuit of the contact signal of the gas density relay body 1, and connects the contact point of the gas density relay body 1 to the intelligent control unit 7. _{Because the gas density relay has been monitored and judged that the gas density value P 20} ≥ the set safety verification density value P _S before starting the calibration, the gas of the electrical equipment 8 is within the safe operation range, and the gas leakage It is a slow process, and it is safe to verify. With the movement of the pressure changing member 502 and the sealing member 503, the volume of the gas chamber 501 is changed, and the pressure of the gas density relay body 1 can be adjusted to make the gas pressure slowly drop, so that the gas density relay body 1 will be contacted. The contact action is transmitted to the intelligent control unit 7 through the online verification contact signal sampling unit 6. The intelligent control unit 7 calculates the gas according to the pressure value P collected by the pressure sensor 2 and the temperature value T collected by the temperature sensor 3 during the contact action. The density value P ₂₀ , or the gas density value P ₂₀ _{can be directly obtained, and the contact signal action value P D20} of the gas density relay body 1 is detected, and the verification of the contact signal action value of the gas density relay is completed. That is, the intelligent control unit 7 is converted into a pressure value P ₂₀ (density value) corresponding to 20° C. according to the gas pressure-temperature relationship characteristic, and can detect the contact action value P _{D20 of the} gas density relay body 1. After the contact action values of the alarm and/or blocking signal of the gas density relay body 1 are all detected, the pressure regulating mechanism 5 is driven by the intelligent control unit 7, and the pressure changing member 502 moves to the left (that is, to the valve 4) When the volume of the gas chamber 501 changes, the pressure of the gas density relay body 1 can be adjusted so that the gas pressure rises slowly, so that the gas density relay body 1 undergoes a contact reset, and the contact reset is transmitted through the online verification contact signal sampling unit 6 To the intelligent control unit 7, the intelligent control unit 7 obtains the gas density value P ₂₀ according to the pressure value P and the temperature value T when the contact is reset, or directly obtains the gas density value P ₂₀ , and detects the contact signal return value P _{F20 of the gas density relay} , To complete the verification of the _{return value P F20} of the contact signal of the gas density relay. This can be repeated multiple times (for example, 2 to 3 times), and then the average value is calculated, thus completing the verification work of the gas density relay body 1.

In the first embodiment, a check valve switch state monitor 15 is also provided. The check valve switch state monitor 15 is provided corresponding to the pressure regulating mechanism 5. In this embodiment, the check valve switch state monitor 15 uses a travel switch. When the valve 4 is in the open state, the pressure adjustment mechanism 5 causes the check valve switch state monitor 15 to output a signal, which is connected to the intelligent control unit 7 and can be uploaded to the target device (such as the background ).

When all the contact signal verification work is completed, the intelligent control unit 7 controls the pressure regulating mechanism 5. The push rod 5S of the pressure regulating mechanism 5 moves to the left under the action of the movement mechanism 5D and the driving part 505, and the valve 4 The spool 401 exerts a force to open the valve 4, the electrical equipment 8 and the gas path of the gas density relay body 1 communicate with each other (as shown in Figure 1), and with the movement of the contact signal interlocking piece 5K, the contact will be checked online The signal sampling unit 6 is adjusted to the working state, and the control circuit of the contact signal of the gas density relay body 1 resumes its normal working state. As shown in Figure 1: At this time, the valve 4 is opened, the gas density relay body 1 is connected to the electrical equipment 8 on the gas path, the gas density relay body 1 normally monitors the gas density of the gas chamber of the electrical equipment 8, and can monitor the electrical Gas density of device 8. That is, the density monitoring circuit of the gas density relay body 1 works normally, and the gas density relay body 1 safely monitors the gas density of the electrical equipment 8 so that the electrical equipment 8 can work safely and reliably. In this way, it is convenient to complete the online verification work of the gas density relay body 1, and at the same time, the safe operation of the electrical equipment 8 will not be affected when the gas density relay body 1 is verified online.

The gas density relay (or gas density monitoring device), intelligent control unit 7 and online verification unit (including pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online The verification contact signal sampling unit 6) can perform online verification on the contact of the gas density relay body 1 according to the set temperature or/season. For example, at 20°C, high temperature TH (such as high temperature 50°C) and/or low temperature TL (such as low temperature minus -30°C), the contacts of the gas density relay body 1 are separately checked online, and the intelligent control unit 7 obtains 20°C respectively , High temperature TH (for example, high temperature 50°C) and/or low temperature TL (for example, low temperature minus -30°C) when the gas density relay body 1 generates contact signal action or switching, the gas density value P collected by the gas density detection sensor _D20 (contact signal action value at 20°C), P _DTH20 (contact signal action value at high temperature TH) and/or P _DTL20 (contact signal action value at low temperature TL) to complete the gas density relay (or gas density Monitoring device) temperature compensation test. Further, the intelligent control unit 7 or the background receives temperature compensation test data, and if the error value |P _DT20 -P _DTH20 | is within its preset threshold, the high temperature temperature of the gas density relay (or gas density monitoring device) The compensation is qualified, otherwise, it is unqualified; and/or if the error value (P _DT20 -P _DTH20 )>0, the high temperature temperature compensation of the gas density relay (or gas density monitoring device) is under compensation, otherwise, it is Over-compensation; or, the intelligent control unit 7 or the background receives temperature compensation test data, if the error value |P _DBZ20 -P _DTH20 | is within its preset threshold, where P _DBZ20 is the standard contact signal action value, then the gas The high temperature temperature compensation of the density relay (or gas density monitoring device) is qualified, otherwise, it is unqualified; and/or if the error value (P _DBZ20 -P _DTH20 )>0, the gas density relay (or gas density monitoring device) ) The high temperature temperature compensation is under compensation, otherwise, it 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 _DTL20 | is within its preset threshold, then The low temperature temperature compensation of the gas density relay (or gas density monitoring device) is qualified, otherwise, it is unqualified; and/or if the error value (P _DT20 -P _DTL20 )>0, then the gas density relay (or gas density The low temperature compensation of the monitoring device) is over compensation, otherwise, it is under compensation; or, the intelligent control unit 7 or the background receives temperature compensation test data, if the error value |P _DBZ20 -P _DTL20 | is within its preset threshold, Where P _DBZ20 is the standard contact signal action value, the low temperature temperature compensation of the gas density relay (or gas density monitoring device) is qualified, otherwise, it is unqualified; and/or if the error value (P _DBZ20 -P _DTL20 )> 0, the low-temperature temperature compensation of the gas density relay (or gas density monitoring device) is over-compensation, otherwise, it is under-compensation. Through temperature compensation test to ensure that the high temperature and low temperature performance of the selected/or used gas density relay is qualified and normal, and the safe and reliable operation of the power grid is ensured.

After the gas density relay body 1 has completed the calibration work, the gas density relay (or gas density monitoring device) will make a judgment, and the detection result can be notified in a flexible manner. In short, after the gas density relay completes the online calibration work, if there is an abnormality, it can automatically send an alarm and can be uploaded to the remote end.

Fig. 3 is a schematic diagram of the circuit principle of the gas density relay intelligently monitored throughout the life cycle of the first embodiment. As shown in FIG. 3, the online verification contact signal sampling unit 6 of this embodiment includes a first connection circuit and a second connection circuit. The first connection circuit connects the contact point P _{J of} the gas density relay body 1 and the contact point signal. The second connecting circuit connects the contact point P _{J of} the gas density relay body 1 and the intelligent control unit 7. In the non-verification state, the second connection circuit is disconnected and the first connection circuit is closed; in the verification state, the online verification contact signal sampling unit 6 cuts off the first connection circuit, and connects to all The second connection circuit connects the contact P _{J of} the gas density relay body 1 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 the control circuit of the contact signal; the second relay J2 is provided with normally open contacts J21 and J22, and the normally open contacts J21 and J22 are connected _{On the contact P J} of the gas density relay body 1; it is also possible that the first relay J1 and the second relay J2 are integrated into one, that is, a relay with normally open and normally closed contacts. In the non-calibration state, the normally closed contacts J11 and J12 are closed, the normally open contacts J21 and J22 are disconnected, and the gas density relay monitors the _{output state of the contact P J} in real time; in the calibration state, the normally closed contacts J11 and J12 When disconnected, the normally open contacts J21 and J22 are closed, and the contact P _{J of the} gas density relay body 1 is connected to the intelligent control unit 7 through the normally open contacts J21 and J22.

To further elaborate, as shown in FIG. 3, the gas density relay (or gas density monitoring device) further includes a contact resistance detection unit 6B, and the contact resistance detection unit 6B and the online verification contact signal sampling unit 6 are arranged together. The contact resistance detection 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 _{both ends of the contact P J of the} gas density relay body 1 through the normally open contacts J31 and J32, and the A/D converter 66 It is connected in series between the output terminal of the amplifier 65 and the intelligent control unit 7.

When the contact signal of the gas density relay body 1 is activated, the intelligent control unit 7 issues an instruction to detect the contact resistance of the contact. The line calibration contact signal sampling unit 6 is under the control of the intelligent control unit 7, and the first relay J1 (61) is two The contacts J11 and J12 are disconnected, so that the contact P _{J is} disconnected from the control circuit of the contact, and the two pairs of normally open contacts J21 and J22 of the second relay J2 (62) are still disconnected. Then, under the control of the intelligent control unit 7, the third relay J3 (63) of the contact resistance detection unit 6B acts, and the two pairs of normally open contacts J31 and J32 on it are closed, making the constant current source 64 and the amplifier 65 and The contacts P _J are connected to each other, and the current I _J _{generated by the constant current source 64 causes the voltage U J to be} generated at both ends of the contact P _J. After processing by the amplifier 65, the A/D converter 66, and the intelligent control unit 7, an accurate voltage is obtained. U _J , the intelligent control unit 7 can detect the contact resistance value R _{J of the} _{gas density relay body 1 according to R J} =U _J /I _J. This embodiment also adopts the constant current method, mainly considering that the resistance of the tested contact is a small resistance. In order to improve the measurement accuracy and eliminate the influence of the test lead on the measurement result, a four-wire system can be used for measurement. In addition, the intelligent control unit 7 adds a zero-return function to the software design, and can correct the test result according to the measurement error, so as to further improve the measurement accuracy of the _{contact resistance value R J of the contact.} After the entire gas density relay calibration (including contact contact resistance detection) is completed, the intelligent control unit 7 controls the third relay J3's contacts J31 and J32 to disconnect, and the online verification contact signal sampling unit 6's second relay J2 contact J21 When disconnected from J22, the contact P _{J of the} gas density relay body 1 is disconnected from the intelligent control unit 7 by disconnecting the contacts J21 and J22 of the second relay J2. At the same time, the intelligent control unit 7 opens the valve 4 to make the gas density relay body 1 communicate with the electrical equipment 8 on the gas circuit. Then, the contacts J11 and J12 of the first relay J1 of the online verification contact signal sampling unit 6 are closed, so that the gas density relay body 1 continues to safely monitor the gas density of the electrical equipment 8 so that the electrical equipment 8 can work safely and reliably. In this way, it is convenient to complete the online verification work of the gas density relay 1 (including contact resistance detection), and at the same time, the safe operation of the electrical equipment 8 will not be affected when the gas density relay 1 is checked online.

The intelligent control unit 7 or the background evaluates the contact life of the gas density relay body 1 or predicts the life of the gas density relay based on the monitored contact resistance value to ensure that the density relay is reliable.

In a preferred embodiment, the aforementioned contact resistance detection unit 6B can also be replaced with an insulation performance detection unit 6C. As shown in FIG. 4, the insulation performance detection 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; the contact P _{J of} the gas density relay body 1 is connected to one end of the voltage exciter 603 through the normally open contact J41, and the other end of the voltage exciter 603 passes through the current detector 604 Grounded, the 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 terminal 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 issues an instruction to detect the insulation performance of the contact. The line verification contact signal sampling unit 6 is under the control of the intelligent control unit 7, and the first relay J1 (61) is two The contact points J11 and J12 are disconnected, so that _{the control circuit of the contact point P J} and the contact point of the gas density relay body 1 is disconnected, and the two pairs of normally open contacts J21 and J22 of the second relay J2 (62) are still disconnected. Then, under the control of the intelligent control unit 7, the fourth relay J4 (67) of the insulation performance detection unit 6C acts, and the normally open contact J41 on it is closed, so that the contact P _{J is} connected to the voltage exciter 603 and the current detector. 604 and the housing (ground) are connected to each other. The leakage current Ix1 generated in the loop through 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. _{The voltage U J} 1 generated by the voltage exciter 603, the resistance Rd1 of the province of the voltage exciter 6031, the resistance Rd2 of the province of the current detector 604, the intelligent control unit 7 can easily detect the contact of the gas density relay body 1 Insulation performance value R _J y (R _J y=U _J 1/Ix1-Rd1-Rd2). The constant voltage method can also be used in this embodiment, mainly considering that the insulation resistance of the tested contact is relatively large. In addition, the intelligent control unit 7 adds a reset function to the software design, and the test result can be corrected according to the measurement error. , In order to further improve the measurement accuracy of the contact insulation performance value R _{J y.} After the verification is completed, the intelligent control unit 7 controls the contact J41 of the fourth relay J4 to be disconnected, and the normally open contacts J21 and J22 of the second relay J2 of the online verification contact signal sampling unit 6 are disconnected. At this time, the gas density relay body The contact P _{J of} 1 is disconnected from the intelligent control unit 7 by disconnecting the normally open contacts J21 and J22 of the second relay J2. The intelligent control unit 7 controls the valve 4 to open, so that the gas density relay 1 is connected to the electrical equipment on the gas circuit. Then, the normally closed contacts J11 and J12 of the first relay J1 of the online verification contact signal sampling unit 6 are closed, _{the control loop of the contact P J} of the gas density relay body 1 works normally, and the gas density relay safely monitors the gas density of electrical equipment. Make electrical equipment work safely and reliably. This facilitates the completion of the online verification of the gas density relay without affecting the safe operation of electrical equipment.

The positions among the gas density relay body 1, pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online verification contact signal sampling unit 6, and intelligent control unit 7 can be flexibly set as required. For example, the gas density relay body 1, the pressure sensor 2 and the temperature sensor 3 can be arranged together; or the pressure sensor 2 and the pressure adjusting mechanism 5 can be arranged together. In short, the settings between them can be flexibly arranged and combined. The gas chamber 501 may be hollow or partially hollow, and its shape is matched with the pressure changing member 502 and used in conjunction with the pressure changing member 502 to adjust the gas pressure change.

FIG. 5 is a schematic diagram of the structure of a gas density relay body used for high- and medium-voltage electrical equipment and intelligently monitored throughout its life cycle according to an embodiment of the present invention. As shown in Fig. 5, the oil leakage diagnostic detector 10 in this embodiment includes a liquid level transmitter, a liquid level sensor or a liquid level gauge, and is arranged in the gas density relay body 1. The body 1 of the gas density relay is filled with a certain amount of oil 112 (usually silicone oil), and the amount of the oil 112 is controlled at the set liquid level 11201. The oil leakage diagnostic detector 10 (liquid level transmitter, or liquid level sensor, or liquid level gauge) is connected to 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 and/or higher than the set liquid level 11201 to a certain extent, the intelligent control unit 7 or the background sends 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 set amount requirement is met. The set liquid level 11201 will be saved as initial data to the connected intelligent control unit 7 or uploaded to the background for comparing the actual liquid level changes collected to determine whether there is oil leakage. Wherein, the gas density relay body 1 includes: a housing 102, a base 108, a pressure detector 103, a temperature compensation element 104, a terminal block 108, and a number of signal generators 109 arranged in the housing 102; The signal generator 109 is a micro switch or a magnetic-assisted electric contact, the pressure detector 103 is a Baden tube, the temperature compensation element 104 uses a temperature compensation sheet, and the gas density relay body 1 generates the signal through the signal The device 109 outputs a contact signal, and the gas density is monitored through the pressure detector 103 and the temperature compensation element 104. The principle is: based on the pressure detector 103 and using the temperature compensation element 104 to correct the changed pressure and temperature to reflect the change in the density of the (sulfur hexafluoride) gas. That is, under the pressure of the measured medium (such as SF6) gas, due to the function of the temperature compensation element 104, when the density value of sulfur hexafluoride (or other) gas changes, the pressure value of the gas changes accordingly, forcing the pressure The end of the detector 103 generates a corresponding elastic deformation displacement, which is transmitted to the movement 105 by means of the temperature compensation element 104, and the movement 105 is transmitted to the pointer 106, and the measured (sulfur hexafluoride) gas density value is displayed on the scale. Indicated on the disk. The signal generator 109 serves as an output alarm latching contact. In this way, the gas density relay body 1 can display the gas density value. If the gas leaks, the gas density value drops, and the pressure detector 103 produces a corresponding downward displacement. It passes through the temperature compensation element 104 and transmits it to the movement 105. The movement 105 transmits it to the pointer 106, and then the pointer 106 has a smaller value. The degree of air leakage is displayed on the dial; at the same time, the pressure detector 103 drives the beam to move downward through the temperature compensation element 104, and the adjusting member 107 on the beam gradually moves away from the signal generator 109. When it reaches a certain level, the signal The contact of the generator 109 is turned on and a corresponding contact signal (alarm or lockout) is sent out. If the gas density value increases, that is, when the gas density value in the sealed gas chamber is greater than the set gas density value, the density value increases accordingly, and the end of the pressure detector 103 and the temperature compensation element 104 produce a corresponding upward displacement, The temperature compensation element 104 also causes the cross beam to move upward, and the adjusting member 107 on the cross beam moves upward and pushes the contact of the signal generator 109 to be disconnected, and the contact signal (alarm or lock) is released.

In this embodiment, after the oil (for example, silicone oil) 112 in the gas density relay body 1 reaches the set liquid level 11201 after the filling is completed, there may be oil leakage during actual use. The working process of the oil leakage diagnosis and detection is: the oil leakage diagnosis detector 10 is placed in an appropriate position in the housing 102 of the gas density relay body 1, and is used to collect the actual liquid level change data of the oil 112 and collect the data The actual liquid level change data is transmitted to the connected intelligent control unit 7 or uploaded to the background through the intelligent control unit 7. The intelligent control unit 7 compares the received and/or calculated data and/or information monitored by the oil leakage diagnostic detector 10 with the set initial data of the liquid level 11201 to obtain the current actual liquid level change of the gas density relay body 1 When the liquid level in the gas density relay body 1 is lower 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 will receive And/or the calculated and monitored data and/or information are uploaded to the background, and the background is compared with the initial data of the set liquid level 11201 to obtain the current actual liquid level change of the gas density relay body 1, and the gas density relay body 1 When the internal liquid level is lower and/or higher than the set liquid level 11201 to a certain extent, an oil leakage alarm signal and/or information will be issued in the background.

The sealing performance detection unit 11 in this embodiment is an oxygen sensor and/or a nitrogen sensor, which is arranged in the gas density relay body 1 and connected to the intelligent control unit 7. The intelligent control unit 7 monitors the oxygen concentration and/or nitrogen concentration in the housing through an oxygen sensor and/or nitrogen sensor. When the monitored oxygen concentration and/or nitrogen concentration is lower than the set preset threshold, the intelligent control unit 7 sends A gas leak alarm signal and/or information, or when the monitored oxygen concentration and/or nitrogen concentration is lower than the normal oxygen concentration and/or nitrogen concentration, the intelligent control unit 7 sends out a gas leak alarm signal and/or information.

After the gas density relay completes the oil leakage or gas leakage performance diagnosis of the gas density relay body 1, if there is an abnormality, it can automatically send an alarm, which can be uploaded to the remote end, or can be sent to a designated receiver, such as a mobile phone. The communication method is wired or wireless. The wired communication method can be RS232, RS422, RS485, CAN-BUS and other industrial buses, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier Etc.; wireless communication methods can be 2G/3G/4G/5G, etc., WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication, sonar, sensor built-in 5G/NB-IOT communication module (Such as NB-IOT) and so on. In short, multiple methods and multiple combinations can be used to fully ensure the reliable performance of the gas density relay.

In a word, in this embodiment, the gas density relay (or gas density monitoring device) for intelligent monitoring of the whole life cycle monitors the gas density of gas-insulated or arc-extinguishing electrical equipment, and at the same time completes the online calibration of the gas density relay body 1. Inspection, online oil leakage diagnosis, online sealing (leakage) performance monitoring, contact contact resistance value monitoring, insulation performance testing, improved efficiency, no maintenance, intelligent management and control of the entire life cycle of density relays, reducing operation and maintenance costs, Ensure the safe operation of the power grid.

Embodiment two:

Fig. 6 is a schematic structural diagram of a gas density relay body used for high and medium voltage electrical equipment and intelligently monitored throughout its life cycle according to the second embodiment of the present invention. The difference between this embodiment and the first embodiment is:

The oil leakage diagnostic detector 10 of this embodiment is mainly composed of a video camera (or 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: the camera obtains the information of the gas density relay through image recognition technology, including oil leakage, water ingress, rust, foreign matter intrusion, blurred dial, rubber aging, rubber fracture, device damage, device falling, device jamming For one or more of them, the intelligent control unit 7 or the background sends out an oil leakage performance alarm signal and/or information.

Alternatively, the oil leakage diagnostic detector 10 is mainly composed of 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 gas density relay body 1 leaks oil, the test paper 1003 reacts with the oil and changes color, and the camera obtains the image of the discolored test paper 1003 through image recognition technology, and obtains the information of the gas density relay, such as oil leakage, water ingress, and pollution. For rust, foreign matter intrusion, blurred dial, etc., the intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information. In a preferred embodiment, the surface of the test paper 1003 may also be coated with a protective coating. After the oil leaks, the oil will dissolve the protective coating, exposing the test paper 1003, and the test paper 1003 chemically reacts with the reaction gas in the air to change color. The camera acquires an image of the discolored test paper 1003 through image recognition technology, acquires the 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 diagnostic detector 10 is mainly composed of a camera and a chemical change reagent 1003, and the camera and the chemical change reagent 1003 are arranged in the gas density relay body 1 or the body. When the gas density relay body 1 leaks oil, the chemical change reagent 1003 changes color, and the camera obtains the discolored chemical change reagent 1003 image through image recognition technology to obtain the gas density relay information, such as oil leakage, water ingress, rust, etc., The intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information.

In this embodiment, the camera can move and/or rotate, and can take pictures from multiple angles.

Embodiment three:

FIG. 7 is a schematic diagram of the structure of a gas density relay body for intelligent monitoring of the whole life cycle for high and medium voltage electrical equipment according to the third embodiment of the present invention. The difference between this embodiment and the first embodiment is:

The sealing performance detection unit 11 is an SF6 diagnostic sensor 1101, and the SF6 diagnostic sensor 1101 may be arranged in the housing 102 of the gas density relay 1; or, the sealing performance detection unit 11 may also include a gas hood (or a leaking gas collector). ) 1102, the gas hood 1102 is arranged on the outside of the gas density relay body 1 and communicates with the housing 102 of the gas density relay body 1 to form a relatively sealed cavity (the SF6 diagnostic sensor and its bottom are required to be sealed , Can collect the leaked SF6 gas, that is, the upper part of the SF6 diagnostic sensor in the cavity may not be completely sealed). The SF6 diagnostic sensor 1101 and the intelligent control unit 7 are arranged in the gas hood 1102. The SF6 diagnostic sensor 1101 includes, but is not limited to, one of an ultrasonic sensor, an infrared sensor, an external laser sensor, and a gas-sensitive semiconductor sensor. The SF6 diagnostic sensor 1101 is connected to the intelligent control unit 7. The intelligent control unit 7 monitors the SF6 gas concentration through the SF6 diagnostic sensor 1101. When the SF6 gas concentration is higher than the set preset threshold, the intelligent control unit 7 or background sends Gas leak alarm signal and/or 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 a gas leak alarm signal and/or information.

The working principle of this embodiment is as follows: the gas cover 1102 is arranged outside the gas density relay body 1 and communicates with the housing 102 of the gas density relay body 1 to form a sealed cavity. The sealed cavity is normally a gas with certain stable properties, and is generally not limited to one or more of air and nitrogen. Under normal circumstances, the amount of 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. of. When the gas circuit of the gas density relay body 1 has gas leakage performance, the leaked gas will be sealed in the sealed cavity, which will increase the SF6 gas concentration in the sealed cavity. The intelligent control unit 7 monitors the SF6 gas concentration through the SF6 diagnostic sensor. When the monitored SF6 gas concentration is higher than the set preset threshold, the intelligent control unit 7 or the background sends out a gas leak alarm signal and/or 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 and/or information.

In addition, the sealing performance detector 11 may also include an oxygen sensor and/or a nitrogen sensor and a gas hood. The gas hood is arranged outside the gas density relay body 1 and may not be directly connected to the housing of the gas density relay body 1. Instead, the air leakage is covered to form a cavity, and the oxygen sensor and/or nitrogen sensor (or other sealing performance detector) are arranged in the gas hood. The gas hood is configured to collect the leaking gas, which is convenient for accumulating more leaking gas and can make the test more accurate. The gas hood can be set accordingly as required. In short, the sealing performance detector 11 is set in the gas density relay body 1 or outside the body, and communicates with the gas path in the gas density relay body 1, or communicates with the cavity formed by the gas hood, through the collection gas path or The gas pressure change, or the current change, or the gas concentration change, or the gas density value change in the cavity formed by the gas hood is used to obtain the gas leakage information of the gas density relay body 1.

Embodiment four:

FIG. 8 is a schematic diagram of the structure of a gas density relay body used for high and medium voltage electrical equipment and intelligently monitored throughout its life cycle according to the fourth embodiment of the present invention. The difference between this embodiment and the first embodiment is:

1) The gas density relay body 1 also has a comparison density value output signal 1505, and the comparison density value output signal 1505 is connected to 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, and the comparison density value output signal 1505 is the first density value PS20. At the same time, the gas density value collected by the gas density detection sensor (pressure sensor 2, temperature sensor 3) is the second density value PJ20, and the intelligent control unit 7 and/or the background sets the first density value to PJ20. The value PS20 is compared with the second density value PJ20 to obtain the density difference |PJ20-PS20|; when the density difference |PJ20-PS20| is within its preset threshold, the gas density relay (or gas density monitoring device) The current working state of the monitoring part is normal working state, otherwise, it is abnormal working state. Through such online monitoring and diagnosis, it is ensured that the gas density relay is in a normal state, without manual maintenance, and the intelligent monitoring of the gas density relay for the entire life cycle is achieved.

2) The intelligent control unit 7 also includes an edge calculation unit that _{performs in-depth calculation processing on the collected gas density value P 20} , pressure value P and temperature value T, and the obtained information and/or monitoring value includes Accurate density value P _{20 accurate} _day , P _{20 accurate week} , P _{20 accurate season} , P _{20 accurate month} , P _{20 accurate year} , density value P ₂₀ , pressure value P, temperature value T, ambient temperature value T _environment , gas interior Temperature value T _internal , maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, replenishment time, replenishment quality, leak rate L _{leak rate year} , L _{leak rate season} , L _{leak rate month} , L _leak One or more of the _{air rate week} and L _{air leakage rate day.}

In particular, the depth calculation processing comprising: means for calculating an edge of the gas density values within a set time period monitored using the average method (average method) is calculated to obtain the average gas density values of P ₂₀ P ₂₀ _{on average,} the The average value P _{20 average} is the accurate density value P _{20 is accurate} ; or, the edge calculation unit _{performs Fourier transform on the gas density value P 20} monitored in the set time interval, and converts it into the corresponding frequency spectrum to convert the periodicity The components are filtered out, and then the accurate density value P _{20 is} calculated accurately; wherein, the P ₂₀ corresponds to the gas density value monitored in real time, the P _{20 accurate year} corresponds to the accurate density value of an annual time interval, and the P _{20 The accurate season} corresponds to the accurate density value of a quarterly time interval, the P _{20 accurate month} corresponds to the accurate density value of a monthly time interval, the P _{20 accurate week} corresponds to the accurate density value of a week interval, the P _{20 exact days} correspond to the exact density value of one day interval.

The above-mentioned average method is: within a set time interval, set the collection frequency, and perform average calculation processing on all N gas density values at different time points that are collected to obtain the average value P of the gas density value P ₂₀ _{20 average} ; or, in the set time interval, set the temperature interval step size, and calculate the average value of the density values of N different temperature values collected in the entire temperature range to obtain the gas density value P ₂₀ Average value P _{20 average} ; or, in the set time interval, set the pressure interval step length, and calculate the average value of the density values of N different pressure values collected in the entire pressure change range to obtain the gas density The average value of the value P ₂₀ _{P 20 average} ; where N is a positive integer greater than or equal to 1.

The edge calculation unit of the intelligent control unit 7 has a plurality of accurate density values P _{20 accurate} at different time intervals. For example, multiple accurate density values P 20 at different time intervals correspond exactly to the accurate density value P _{20 at} an annual time interval. _Accurate _year , respectively correspond to the accurate density value P _{20 at a quarterly time interval. Accurate season} , respectively. exact density values monthly interval P _{20 months accurate,} an accurate density value corresponding one week interval P _{20 weeks accurate,} precise density value corresponding day interval P _{20 days accurate.} The multiple accurate density values P ₂₀ at different time intervals are accurately uploaded to the target device or target platform through the communication module, thereby achieving more accurate online monitoring of the gas density value of the electrical device. Generally speaking, the density value P _{20 accurate year} and the density value P _{20 accurate season are} suitable for the judgment of the electric equipment with slight leakage; while the density value P _{20 accurate month} and the density value P _{20 accurate week are} suitable for the medium-sized leaking electrical equipment Analyzing; and _{20 days of accurate} density value and density value P P ₂₀ (real) electrical device is adapted to determined a significant leakage. Through multi-level calculation and multi-level monitoring, it not only ensures safety, but also improves precision performance. At the same time, it innovatively solves the industry's problem: the temperature difference between the gas density relay and the gas chamber of the electrical equipment.

The depth calculation processing further includes: the edge calculation unit calculates the air leakage rate L of the monitored electrical equipment, the air leakage rate L=△P _20t /t=(P _{20 accurate before t-} P _{20 accurate t} ) /t, where: t is the set time interval, △P _20t is the change of the density value in the time interval t, P _{20 before t} is the accurate density value in the previous time interval, and P _{20 is the accurate t} for The accurate density value in the current time interval; wherein, the L _{leakage rate year} corresponds to the leakage rate of an annual time interval, the L _{leakage rate season corresponds to the air leakage rate of} a quarterly interval, and the L _{leakage rate The air} leakage rate month corresponds to the air leakage rate at a monthly time interval, the L _{air leakage rate week} corresponds to an accurate air leakage rate at a one-week interval, and the L _{air leakage rate day} corresponds to the air leakage rate at a one-day interval.

The depth calculation process further comprises: an edge calculation unit calculates the _{_time} of the monitored electrical device qi _qi time T, the time T qi _{qi Time} = (P ₂₀ -P ₂₀ _accurately _qi) / L, in the formula, P _{20 supplemental air} is the density value that needs supplemental air to be set.

The depth calculation process further comprises: an edge calculation unit calculates the electrical equipment required to monitor the total gas plenum _total mass Q = ρ _need × V, where, [rho] is the mass density of the _required needs qi, if necessary density values _qi and qi P ₂₀ to obtain characteristics of a gas, V is the volume of the gas chamber electrical equipment; and Q calculation unit calculates the edge of electrical equipment being monitored current air mass of gas chamber _present _current × V = ρ formula, [rho] is _{the current} density of the current mass of gas, according to the current value of the monitored gas density and gas characteristics P ₂₀ obtained; calculated by the total mass of _{the total} gas Q and Q current gas mass calculated _current gas mass Q qi _{Replenishing Qi} = Q _total- Q _present .

3) The gas density relay (or gas density monitoring device) also has a notice of the occurrence of gas liquefaction, and/or the time of occurrence of gas liquefaction, and/or the duration (time length) of the occurrence of gas liquefaction. Specifically, the intelligent control unit 7 receives the density value P ₂₀ monitored by the gas density detection sensor. If the density value P ₂₀ ≤ a preset threshold density value P _20SD , the intelligent control unit 7 or the background sends a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction. Alternatively, the intelligent control unit 7 receives the temperature value T monitored by the gas density detection sensor, and if the temperature value T ≤ a preset threshold temperature value T _SD , the intelligent control unit 7 or the background sends out a liquefaction notice signal and/or information, And/or notify the time of gas liquefaction, and/or notify the duration of gas liquefaction. Alternatively, the intelligent control unit 7 receives the pressure value P monitored by the gas density detection sensor, and within a set time period, if the pressure change value ΔP ≥ the preset threshold pressure change value ΔP _SD , the intelligent control unit 7 or send out liquefaction notice signals and/or information in the background, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction. Alternatively, the intelligent control unit 7 receives the pressure value P monitored by the gas density detection sensor, and at a specific temperature value T _TD , if the pressure value P ≤ a preset threshold pressure value P _SD , the intelligent control unit 7 or background sends The liquefaction notice signal and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction. Alternatively, the intelligent control unit 7 generates a corresponding density curve for display and storage according to the received density value information collected by the gas density detection sensor, judges or diagnoses the density curve, and the intelligent control unit 7 or the background sends The liquefaction notice signal and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction. Alternatively, the intelligent control unit 7 generates a corresponding temperature curve for display and storage according to the received temperature value information collected by the gas density detection sensor, judges or diagnoses the temperature curve, and the intelligent control unit 7 or the background sends The liquefaction notice signal and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction. Alternatively, the intelligent control unit 7 generates a corresponding pressure curve for display and storage according to the pressure value information collected by the gas density detection sensor, judges or diagnoses the pressure curve, and the intelligent control unit 7 or the background sends The liquefaction notice signal and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction.

Embodiment five:

Fig. 9 is a schematic diagram of the structure of a gas density relay body for intelligent monitoring of the whole life cycle for high and medium voltage electrical equipment according to the fifth embodiment of the present invention. The difference between this embodiment and the third embodiment is: in this embodiment, a multi-way connector 9, an air leakage shutoff member 13, a contact isolation unit 14, and a device-side gas density detection sensor 12 are also added. The intelligent control unit 7 is respectively connected with the air leakage shut-off component 13, the contact isolation unit 14, and the equipment side gas density detection sensor 12. One end of the air leakage shut-off member 13 is connected to the multi-way connector 9, the multi-way connector 9 is connected to the electrical equipment 8, and the other end of the air leakage shut-off member 13 is connected to the connector 110 of the gas density relay body 1. Connection; The leakage shutoff 13 is configured to close the air circuit connecting the electrical equipment 8 and the gas density relay body 1 side when the sealing performance on the gas density relay body 1 side is problematic. The contact isolation unit 14 is also directly or indirectly connected to the gas density relay body 1 and is configured to disconnect the contact of the gas density relay body 1 and the contact signal control circuit when the gas leakage shutoff 13 is closed. The contact isolation unit 14 can be set together with the intelligent control unit 7. The device-side gas density detection sensor 12 (in this case, a pressure sensor and a temperature sensor, or a pressure sensor combined with a temperature sensor for online inspection) is arranged on the side of the air leakage shut-off part 13 that is connected to the electrical device 8. The connector 9 is connected to the intelligent control unit 7 and is configured to monitor the gas density value P _{SB20 of the} electrical equipment 8.

The principle of air leakage monitoring in this embodiment is the same as that in the third embodiment, and will not be repeated here. The difference is that when air leakage occurs on the side of the gas density relay body 1, you can control the air leakage shut-off piece 13 to close the air circuit connecting the electrical equipment 8 and the gas density relay body 1 side to prevent the leakage from continuing to occur. That is to prevent the leakage accident from continuing to occur. The specific working principle is: the air leakage shutoff 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 there is a problem with the sealing performance on the side of the gas density relay body 1, that is, when the intelligent control unit 7 or the background sends out a gas leakage alarm signal and/or information, the intelligent control unit 7 shuts down the electrical equipment 8 by controlling the gas leakage shutoff 13 The gas circuit connected to one side of the gas density relay body 1; and when the leakage shutoff 13 (such as an electric control valve) is closed, the intelligent control unit 7 monitors the gas density value of the electrical equipment 8 through the equipment side gas density detection sensor 12 P _SB20 ; when the monitored gas density value P _SB20 of the electrical equipment 8 is greater than the preset threshold (generally slightly larger than the alarm value or the blocking value), the intelligent control unit 7 controls the contact isolation unit 14 to make the gas density relay The contact of the body 1 is not connected to the contact signal control circuit; and when the gas density value P _SB20 of the electrical equipment 8 is monitored ≤ the preset threshold, the intelligent control unit 7 controls the contact isolation unit 14 to make the gas density relay The contact of the main body 1 is connected to the contact signal control circuit or is connected again (the original disconnection needs to be switched to the connection). In this way, it can be realized: when there is a gas leakage on the side of the gas density relay body 1, the gas path connected to the electrical equipment 8 and the gas density relay body 1 side can be closed by controlling the gas leakage shut-off piece 13 to prevent the leakage. If the gas continues to occur, that is, to prevent the leakage accident from occurring; at the same time, the intelligent control unit 7 also monitors the gas density value P _{SB20 of the} electrical equipment 8 in real time through the equipment side gas density detection sensor 12, and controls the contact isolation unit 14 in real time according to the situation. Ensure that the electrical equipment 8 is still operating reliably, that is, when the gas density value P _{SB20 is} greater than the preset threshold value, the contact isolation unit 14 plays a role, and does not upload the wrong signal to cause blocking or false alarm; and when the gas density value P _SB20 ≤ the preset threshold value At this time, the contact isolation unit 14 is equivalent to not working, and the gas density relay sends out an alarm or a blocking signal. In addition, the intelligent control unit 7 or the background sends out the air leakage information in time, so that the operation and maintenance personnel can know in time and deal with the air leakage in time. This can avoid the leakage of the gas density relay body 1 and reduce the emission of SF6 gas into the air. Safety is also conducive to environmental protection. The above-mentioned gas leakage on the side of the gas density relay body 1 generally refers to the gas density relay body 1 (such as Baden tube, welding place, connection), or part of the sealing performance detector, or online verification unit (such as gas density detection) Sensors, pressure regulating mechanism) and other devices or components have air leakage.

Embodiment 6:

FIG. 10 is a schematic diagram of the structure of a gas density relay body for intelligent monitoring of the whole life cycle for high and medium voltage electrical equipment according to the sixth embodiment of the present invention. The difference from the first embodiment is that the oil leakage diagnosis detector 10 in this embodiment is mainly composed of a pressure sensor which is arranged in the housing 102 of the gas density relay body 1 and is connected to the intelligent control unit 7. The pressure sensor uploads the collected pressure signal P in the housing 102 of the gas density relay body 1 to the intelligent control unit 7.

The working principle of this example is that the housing 102 of the gas density relay body 1 is filled with a certain amount of oil 112, which is packaged after reaching the set liquid level 11201. The housing 102 of the gas density relay body 1 is a sealed cavity, and the sealed cavity contains a large proportion of oil 112 and a small amount of gas space to form a sealed space with a relatively stable pressure. The pressure value P of the sealed space can be set within a certain range as the set pressure value P _S. The pressure sensor is used to detect the pressure P in the sealed cavity, and upload the collected pressure signal P to the intelligent control unit 7 through the pressure sensor. Under normal circumstances, the pressure P in the gas density relay body 1 is relatively stable. When oil leakage occurs, the oil 112 in the sealed cavity decreases, and the gas space in the sealed cavity increases, which will cause The pressure P in the gas density relay body 1 decreases. Therefore, when oil leakage occurs, when the pressure value P collected by the pressure sensor is lower than the set pressure value P _S , an oil leakage alarm signal and/or information can be sent through the intelligent control unit 7 or the background. Alternatively, the oil leakage can also be detected by the fluctuation of the pressure P, that is, the pressure P gradually decreases to detect the oil leakage.

Embodiment Seven:

FIG. 11 is a schematic diagram of the structure of a gas density relay body for intelligent monitoring of the whole life cycle for high and medium voltage electrical equipment in Embodiment 7 of the present invention. The difference from the first embodiment is that the oil leakage diagnosis detector 10 in this embodiment is mainly composed of a first temperature sensor 301 and a second temperature sensor 302. Wherein, the first temperature sensor 301 is arranged at a proper position in the oil of the gas density relay body 1 and is connected to the intelligent control unit 7; the second temperature sensor 302 is arranged at the oil-free position of the gas density relay body 1 And connected with the intelligent control unit 7. The first temperature sensor 301 collects the temperature signal in the oil 112 as T1 and uploads T1 to the intelligent control unit 7; the second temperature sensor 302 collects the temperature signal as T2 and uploads T2 to the intelligent control unit 7. The intelligent control unit 7 compares T1 and T2, and if the temperature difference |T1-T2|≤the preset threshold, the intelligent control unit 7 or the background sends an oil leakage alarm signal and/or information. Alternatively, the intelligent control unit 7 generates a corresponding first temperature curve for display and storage according to the received temperature information collected by the first temperature sensor 301, and generates a corresponding first temperature curve according to the received temperature information collected by the second temperature sensor 302 The second temperature curve is displayed and saved, and the first temperature curve and the second temperature curve are judged. In the same time period, when the change trends of the first temperature curve and the second temperature curve are the same or tend to be the same, the intelligent control unit 7 Or send out oil spill alarm signal and/or information in the background.

The working principle of this embodiment is as follows: the first temperature sensor 301 and the second sensor 302 are respectively arranged in the oil and oil-free positions in the housing 102 of the gas density relay body 1, due to the medium in which they are located. The environment is different, and the thermal conductivity of the medium environment is different, which will cause the temperature T1 and T2 collected in the same time period to be different. Conversely, if the temperatures T1 and T2 collected by the first temperature sensor 301 and the second sensor 302 are similar or approaching, it means that the media environment in which they are located tends to be the same, and they are similar, and then the diagnosis The position of the first temperature sensor 301 in the housing 102 of the gas density relay body 1 where the oil was originally placed is now out of oil, the oil 112 is reduced, and oil leakage has occurred. The intelligent control unit 7 diagnoses the uploaded data T1 and T2. If the temperature difference |T1-T2|≤the preset threshold, the intelligent control unit 7 or the background sends an oil leakage alarm signal and/or information.

In another preferred embodiment, the oil leakage diagnostic detector 10 can also be composed of a temperature sensor, which is arranged in the oil in the housing 102 of the gas density relay body 1. If the change trend of the temperature value collected by the temperature sensor changes, it indicates that an oil leak has occurred. Specifically, the temperature of the temperature sensor is collected at a preset time interval, the temperature value T1 sampled in the current time interval and the temperature value T2 collected in the adjacent previous time interval are calculated for the difference, if the temperature difference |T1- T2| exceeds the preset temperature change threshold, the intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information. Alternatively, the intelligent control unit 7 generates a corresponding temperature curve for display and storage according to the received temperature information collected by a temperature sensor located below the oil level, and judges the temperature curve according to preset information, and then judges the temperature. When the curve is abnormal, an oil leakage alarm signal and/or information will be issued.

In another preferred embodiment, the oil leakage diagnostic detector 10 is mainly composed of a first temperature sensor and a second temperature sensor. The first temperature sensor and the second temperature sensor are both located below the oil surface and located at different heights. . The first temperature sensor and the second temperature sensor respectively upload the collected temperature signals T1 and T2 to the intelligent control unit 7. If the temperature difference |T1-T2| exceeds the preset temperature change threshold, it indicates that the two are located The medium environment is inconsistent. The temperature sensor placed at a high position is now out of oil. If an oil leak has occurred, the intelligent control unit 7 or the background will send out an oil leak alarm signal and/or information. Alternatively, the intelligent control unit 7 generates a corresponding temperature curve for display and storage according to the received temperature information collected by the first temperature sensor and the second temperature sensor located below the oil level, and compares the temperature curve according to preset information. Make a judgment, and send an oil leakage alarm signal and/or information when it is judged that the temperature profile is abnormal.

Embodiment 8:

Fig. 12 is a schematic structural diagram of a gas density relay body for intelligent monitoring of the whole life cycle for high and medium voltage electrical equipment according to the eighth embodiment of the present invention. The difference from the first embodiment is that the oil leakage diagnostic detector 10 in this embodiment is mainly composed of resistors, which are arranged at appropriate positions in the oil in the housing 102 of the gas density relay body 1, and are compatible with the intelligent The control unit 7 is connected, and when the resistance value of the resistor is lower or/higher than the preset threshold value, the intelligent control unit 7 or the background sends an oil leakage alarm signal and/or information.

The working principle of this embodiment is as follows: in medium oil and in an oil-free medium environment, the resistance value R of the resistor will change. When the resistance value R of the resistor originally set in the oil changes, the intelligent control unit 7 can determine whether the gas density relay body 1 has oil leakage by diagnosing the change amount of the resistance value R. When the resistance value R of the resistor is lower or/higher than the set preset threshold value, the intelligent control unit 7 or the background sends an oil leakage alarm signal and/or information.

Of course, the structure of the oil leakage diagnostic detector 10 is not limited to the above-mentioned embodiments. For example, in another preferred embodiment, the oil spill diagnostic detector 10 can also use an ultrasonic sensor to monitor the oil spill, and the ultrasonic sensor uses the ultrasonic wave generated by the ultrasonic sensor to travel at different speeds in the oil for diagnosis. Specifically, the ultrasonic sensor is arranged on the gas density relay body 1, and is used to collect the liquid level (oil level) in the gas density relay body 1. The liquid level (oil level) in the gas density relay body 1 is lower than the set value. When the liquid level is higher, the intelligent control unit 7 or the background sends out an oil leakage alarm signal and/or information.

In another preferred embodiment, the oil leakage diagnostic detector 10 can also use a reed switch for oil leakage monitoring, specifically, it includes a reed switch, a floating piece, a driving piece, the reed pipe, a floating piece (for example, Using a floating ball), the driving part is arranged in the gas density relay body 1, wherein the floating part is arranged below the oil surface of the gas density relay body 1 (oil leakage monitoring position), the floating part is connected with the driving part, and the driving part is connected with the dry part. The reed pipe is set correspondingly. When the gas density relay body 1 leaks oil, its oil level will drop, the buoyancy of the floating part will decrease, and the floating part will move down, driving the driving part to move, and then changing the contact point of the reed switch and outputting a signal. When the intelligent control unit 7 collects the signal, the intelligent control unit 7 or the background will send out an oil leakage alarm signal and/or information.

In another preferred embodiment, the oil leakage diagnostic detector 10 can also use a reed tube (or micro contact) and a leakage collector to monitor oil leakage, specifically, it includes a reed tube (or micro contact), leakage The liquid collector, the driving part, the reed tube (or the micro contact), the leaking liquid collector, and the driving part are arranged outside the gas density relay body 1, wherein the leaking liquid collector is arranged below the gas density relay body 1, and The leakage collector is connected with the driving part, and the driving part is arranged corresponding to the reed switch. When the gas density relay body 1 leaks oil, the leaked oil will be collected in the leak collector. As the leaked oil increases, the weight of the leak collector will increase, and the leak collector will drive the drive components. The displacement causes the contact of the reed switch (or micro contact) to change and output a signal. The intelligent control unit 7 collects the signal, and the intelligent control unit 7 or the background will send out an oil leakage alarm signal and/or information. Alternatively, the oil leakage diagnostic detector 10 may also use a weight sensor and a leakage collector to monitor oil leakage, specifically, it includes a weight sensor and a leakage collector, the weight sensor and the leakage collector are arranged on the body of the gas density relay 1, the leakage collector is arranged below the outside of the gas density relay body 1, and the leakage collector is arranged corresponding to the weight sensor. When the gas density relay body 1 leaks oil, the leaked oil will be collected in the leak collector. As the leaked oil increases, the weight of the leak collector will increase. The weight sensor can sense its weight (mass), and the intelligent control unit 7 collects the weight (mass) signal value. When the weight (mass) signal value is higher than the set weight (mass) value, the intelligent control unit 7 or the background An oil spill alarm signal and/or message will be issued. The weight sensor may also include, but is not limited to, one or more of a gravity sensor, a displacement sensor, a deformation sensor, a photoelectric sensor, and an angle sensor. For example, the leakage collector may be bowl-shaped or groove-shaped, and is arranged outside the gas density relay body through an elastic element, and the weight sensor is arranged below the leakage collector, which can sense and/or detect the leakage of the liquid collector. weight.

In another preferred embodiment, the oil leakage diagnostic detector 10 can also use a photoelectric sensor for oil leakage monitoring. Specifically, the photoelectric sensor is arranged below the oil surface of the gas density relay body 1 (oil leakage monitoring position), The photoelectric sensor is connected with the intelligent control unit 7. When the gas density relay body 1 leaks oil, its oil level will drop, and the photoelectric sensor will be exposed to the liquid level (oil level), because the propagation direction of light in the oil (liquid) and air is different, such as oil leakage. The signal of the photoelectric sensor will be changed, and the intelligent control unit 7 will collect the signal to change, and the intelligent control unit 7 or the background will send out an oil leakage alarm signal and/or information.

Example 9:

Figures 13-15 are schematic diagrams of a gas density monitoring system for high- and medium-voltage electrical equipment with full life cycle intelligent monitoring. The gas density monitoring system includes the above-mentioned gas density relay (or gas density monitoring device) with full life cycle intelligent monitoring.

As shown in Figure 13, multiple electrical equipment with gas chambers, multiple life-cycle intelligent monitoring gas density relays (or gas density monitoring devices) are connected to the remote background detection system through a hub and an IEC61850 protocol converter in turn; Among them, the gas density relays (or gas density monitoring devices) for intelligent monitoring of the whole life cycle are respectively arranged on the electrical equipment of the corresponding gas chambers.

As shown in Figures 14 and 15, PC is the online monitoring background host and system, Gateway is the network switch, Server is the integrated application server, ProC is the protocol converter/online monitoring intelligent unit, HUB is the hub, and Z is the life cycle intelligence Monitored gas density relay (or gas density monitoring device). The architecture of the gas density monitoring system includes: simple architecture (Figure 13), conventional architecture (Figure 14), complex architecture and other system diagrams.

System architecture diagram and simple description: 1), background software platform: based on Windows, Linux and others, or VxWorks, Android, Unix, UCos, FreeRTOS, RTX, embOS, MacOS. 2) Key business modules and basic functions of the background software: such as authority management, equipment management, data storage in query, etc.; and user management, alarm management, real-time data, historical data, real-time curve, historical curve, configuration management, data collection, Data analysis, recording conditions, and exception handling. 3). Interface configuration: such as Form interface, Web interface, configuration interface, etc.

Specifically, as shown in Figure 13, the online monitoring background host and the system PC communicate with multiple hubs HUB (HUB1, HUB2,...HUBm) through the hub HUB0. Each hub HUB is connected to a set of gas density relays (or gas density monitoring devices) Z that are intelligently monitored throughout the life cycle, such as hub HUB1 connected to gas density relays (or gas density monitoring devices) Z11, Z12, ... …Z1n, the hub HUB2 is connected to the gas density relay (or gas density monitoring device) for intelligent monitoring of the life cycle Z21, Z22, ……Z2n, …, the hub HUBm is connected to the gas density relay (or gas density monitoring of the intelligent monitoring of the life cycle) Device) Zm1, Zm2, ... Zmn, where m and n are all natural numbers.

As shown in Figure 14, the online monitoring background host and system PC are connected to two integrated application servers Server1 and Server2 through the network switch Gateway. The two integrated application servers Server1 and Server2 are connected to multiple protocol converters through the station control layer A network and B network. /Online monitoring intelligent unit ProC (ProC1, ProC2,...ProCn) communication, protocol converter/online monitoring intelligent unit ProC communicates with multiple hubs (HUB1, HUB2,...HUBm) through the R5485 network. Each hub HUB is connected to a set of gas density relays (or gas density monitoring devices) Z that are intelligently monitored throughout the life cycle, such as hub HUB1 connected to gas density relays (or gas density monitoring devices) Z11, Z12, ... …Z1n, the hub HUB2 is connected to the gas density relay (or gas density monitoring device) for intelligent monitoring of the life cycle Z21, Z22, ……Z2n, …, the hub HUBm is connected to the gas density relay (or gas density monitoring of the intelligent monitoring of the life cycle) Device) Zm1, Zm2, ... Zmn, where m and n are all natural numbers.

Figure 15 is a system diagram of the wireless transmission mode architecture. The dashed box in the figure indicates that the wireless module Wn and the gas density relay Zn can be integrated or separated, and the specific scheme can be flexible. Multiple integrated application servers Server1, Server2,...Server n communicate wirelessly with each gas density relay through cloud Cluod, wireless gateway (Wireless Gateway), and wireless modules of each gas density relay. Among them, n is a natural number.

It should be noted that, in this application, a gas density relay for intelligent monitoring of the whole life cycle generally refers to the design of its constituent elements into an integrated structure; and the gas density monitoring device generally refers to the design of its constituent elements in a flexible structure. composition. Gas temperature generally refers to the temperature in the gas, or the corresponding ambient temperature. The gas density relay can utilize the original gas density relay of the substation for technical transformation and upgrading.

The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of the present invention should all fall within the scope of the present invention.

Claims

A gas density relay capable of intelligent monitoring throughout its life cycle, which is characterized by comprising: a gas density relay body, an online verification unit, an oil leakage diagnostic detector, and an intelligent control unit; wherein,

The gas density relay body contains anti-vibration oil;

The online verification unit includes a gas density detection sensor, a pressure adjustment mechanism, a valve, and an online verification contact signal sampling unit; the gas path of the pressure adjustment mechanism is in communication with the gas density relay body, and the pressure adjustment mechanism is It is configured to adjust the pressure rise and fall of the gas density relay body to make the gas density relay body generate a contact signal action; the gas density detection sensor communicates with the gas density relay body on the gas path; the online verification contact The signal sampling unit is directly or indirectly connected to the gas density relay body, and is configured to sample the contact signal of the gas density relay body; one end of the valve is provided with an air inlet communicating with electrical equipment, and The other end of the valve is connected to the gas path of the gas density relay body, or the other end of the valve is connected to the gas path of the pressure regulating mechanism, thereby connecting the valve to the gas path of the gas density relay body Pass;

The oil leakage diagnostic detector is set inside or outside the gas density relay body, and is used to collect oil leakage information of the gas density relay body;

The intelligent control unit is respectively connected with the oil leakage diagnosis detector, the pressure adjustment mechanism, the gas density detection sensor and the online verification contact signal sampling unit, and receives and/or calculates the oil leakage The data and/or information monitored by the diagnostic detector completes the control of the pressure adjustment mechanism, pressure value collection and temperature value collection, and/or gas density value collection, and detection of the contact signal action value of the gas density relay body and /Or the return value of the contact signal;

Wherein, the contact signal includes alarm and/or lockout.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the valve is closed or opened under the control of the pressure regulating mechanism; or, the valve is also connected to the intelligent control The units are connected and turned off or turned on under the control of the intelligent control unit.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 2, wherein the pressure regulating mechanism and the valve are combined parts; wherein,

The pressure regulating mechanism includes: a gas chamber, the gas chamber is provided with a first interface communicating with the gas path of the gas density relay body, and a second interface hermetically connected with the air outlet of the valve, the first The relative positions of the first interface and the second interface are staggered; the air chamber is provided with a pressure changing member, the pressure changing member is in sealing contact with the inner wall of the air chamber, and the pressure changing member is provided with a pusher on the side facing the second interface Rod; the pressure changing member is connected to a driving member through a connecting member, and the driving member drives the connecting member to drive the pressure changing member and the push rod to move in the air chamber to control the opening or closing of the valve; The gas pressure in the gas chamber changes as the position of the pressure changing member changes;

The valve includes a valve body, the valve body is provided with an air inlet connected to an electrical device and an air outlet connected to a pressure regulating mechanism along its axial direction, and a cavity inside the valve body is provided with a valve core assembly , The valve core assembly includes a circlip, an elastic member and a valve core, one end of the elastic member is fixedly connected to the air inlet through the circlip, and the other end of the elastic member is fixedly connected to one end of the valve core , The other end of the valve core penetrates the air outlet and is arranged directly opposite to the push rod, and there is a gap between the valve core and the push rod; the valve core interacts with the valve under the action of the elastic member. The inner wall of the body is connected in a sealed manner to block the air inlet and the air outlet of the valve.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 3, characterized in that: the push rod pushes the valve core to move in the cavity of the valve body in the direction of the air inlet, and the The valve core is separated from the valve body, and the elastic member is in a compressed state, and the air inlet of the valve communicates with the air outlet.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 3, characterized in that: one end of the gas chamber of the pressure adjusting mechanism is provided with a third interface, and one end of the connecting piece is connected to the pressure change The other end passes through the third interface and is connected to the drive component.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 5, wherein the pressure adjusting mechanism further comprises a sealed coupling member, one end of the sealed coupling member is sealedly connected with the third interface, The other end of the sealing coupling is connected to the driving end of the driving component in a sealed manner, or the sealing coupling seals and encloses the coupling and the driving component in the sealing coupling; the sealing coupling includes a corrugated One of tube, air bag, and sealing ring.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 3, characterized in that: the pressure changing member is a piston, or an airbag, or a bellows; and the driving component includes a magnetic drive mechanism, a motor, and a reciprocating Motion mechanism, Carnot cycle mechanism, air compressor, compressor, bleed valve, pressure generating pump, booster pump, booster valve, electric air pump, electromagnetic air pump, pneumatic components, magnetic coupling thrust mechanism, heating generating thrust mechanism, One of the electric heating generating thrust mechanism and the chemical reaction generating thrust mechanism; the elastic member is a return spring.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 3, characterized in that: the valve body is provided with a seal that is hermetically connected to the pressure regulating mechanism; and/or the valve body is provided with A seal that is hermetically connected to the electrical equipment; and/or the valve core is provided with a seal that is hermetically connected to the inner wall of the valve body.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: the oil leakage diagnostic detector includes a liquid level transmitter, a liquid level sensor, a liquid level controller, a liquid level switch, One or more of level gauges, pressure sensors, temperature sensors, cameras, test papers, and chemical change reagents.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 9, wherein the oil leakage diagnosis detector is a liquid level transmitter, a liquid level sensor or a liquid level gauge, and the oil leakage diagnosis The detector is set in the main body of the gas density relay to collect the liquid level in the main body of the gas density relay. When the liquid level in the main body of the gas density relay is lower and/or higher than the set liquid level, the intelligent control unit sends out a leak Oil alarm signal and/or information.
The gas density relay with intelligent monitoring throughout its life cycle according to claim 9, characterized in that: the oil leakage diagnostic detector is a liquid level controller or a liquid level switch. When the gas density relay body has an oil leakage When the value is set, the liquid level controller or the liquid level switch sends out an oil leakage alarm signal and/or information, and the oil leakage alarm signal and/or information is uploaded to the intelligent control unit.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 9, characterized in that: the oil leakage diagnostic detector is a pressure sensor, the pressure sensor is arranged in the gas density relay body, and the pressure sensor Upload the collected 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 in the gas density relay body When the pressure change value is higher than the set pressure change range, the intelligent control unit sends out an oil leakage alarm signal and/or information.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 9, characterized in that: the oil leakage diagnostic detector comprises a first temperature sensor and a second temperature sensor, the first temperature sensor, the second temperature sensor The temperature sensor is arranged in the gas density relay body, wherein the first temperature sensor is arranged below the oil surface of the gas density relay body, and the second temperature sensor is arranged at the oil-free position of the gas density relay body; The control unit receives the temperature signal T1 collected by the first temperature sensor and the temperature signal T2 collected by the second temperature sensor. If the temperature difference |T1-T2|≤the preset threshold value, the intelligent control unit issues an oil leakage alarm signal and/ Or information; or, the intelligent control unit generates a corresponding first temperature curve for display and storage according to the received temperature information collected by the first temperature sensor, and generates a corresponding first temperature curve according to the received temperature information collected by the second temperature sensor The second temperature curve is displayed and saved, and the first temperature curve and the second temperature curve are judged. In the same time period, when the change trends of the first temperature curve and the second temperature curve are consistent or tend to be consistent , The intelligent control unit sends out an oil leakage alarm signal and/or information; or,

The oil leakage diagnosis detector includes a first temperature sensor and a second temperature sensor. The first temperature sensor and the second temperature sensor are both arranged below the oil surface in the gas density relay body and located at different heights; The control unit receives the temperature signal T1 collected by the first temperature sensor and the temperature signal T2 collected by the second temperature sensor. If the temperature difference |T1-T2| exceeds the preset temperature change threshold, the intelligent control unit issues an oil leakage alarm Signal and/or information; or, the intelligent control unit generates the corresponding first temperature curve according to the received temperature information collected by the first temperature sensor for display and storage, and generates according to the received temperature information collected by the second temperature sensor The corresponding second temperature curve is displayed and saved, and the first temperature curve and the second temperature curve are judged. In the same time period, the change trends of the first temperature curve and the second temperature curve are inconsistent or When the trend of inconsistency becomes more obvious, the intelligent control unit sends out an oil spill alarm signal and/or information; or,

The oil leakage diagnosis detector includes a temperature sensor which is arranged below the oil surface of the gas density relay body; the intelligent control unit compares the received temperature value T1 sampled in the current time interval with the adjacent one The temperature value T2 collected in the time interval is calculated for the difference. If the temperature difference |T1-T2| exceeds the preset temperature change threshold, the intelligent control unit sends out an oil leakage alarm signal and/or information; or, the intelligent control The unit generates a corresponding temperature curve for display and storage according to the received temperature information collected by the temperature sensor located below the oil level, and judges the temperature curve according to the preset information, and sends out oil leakage when it is judged that the temperature curve is abnormal. Alarm signal and/or information.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 9, characterized in that: the oil leakage diagnostic detector is a camera, and the camera is arranged outside the gas density relay body; the camera recognizes by image The technology obtains 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 oil leakage diagnostic detector includes a camera and test paper, the camera and test paper are arranged outside the gas density relay body; when the gas density relay leaks oil, the test paper reacts with the oil and changes color, or the surface of the test paper It is coated with a protective coating. After the oil leaks, the oil dissolves the protective coating, exposing the test paper, and the test paper reacts with the reaction gas in the air to change color; the camera obtains the discolored test paper image through image recognition technology, and obtains the gas density relay Abnormal information, and send out an oil spill alarm signal and/or information through the intelligent control unit; or,

The oil leakage diagnostic detector includes a camera and a chemical change reagent, the camera and the chemical change reagent are arranged outside the gas density relay body; when the gas density relay leaks oil, the chemical change reagent changes color, and the camera passes The image recognition technology obtains the discolored chemical change reagent image, obtains the abnormal information of the gas density relay, and sends out the oil leakage alarm signal and/or information through the intelligent control unit or the background;

Wherein, the abnormal information obtained by the camera includes one or more of oil leakage, water ingress, rust, foreign matter intrusion, blurred dial, rubber aging, rubber fracture, device damage, device falling, and device jamming.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor, and the pressure sensor is installed on the gas density. On the gas path of the relay body, the temperature sensor is installed on or outside the gas path of the gas density relay body, or installed in the gas density relay body, or installed outside the gas density relay body; or,

The gas density detection sensor is a gas density transmitter composed of a pressure sensor and a temperature sensor; or,

The gas density detection sensor is a density detection sensor using quartz tuning fork technology.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: the gas density relay further comprises a sealing performance detection unit; the sealing performance detection unit comprises an oxygen sensor and/or a nitrogen sensor, The oxygen sensor and/or nitrogen sensor are arranged in the housing of the gas density relay body; or, the sealing performance detection unit includes an oxygen sensor and/or nitrogen sensor and a gas hood, and the gas hood is arranged outside the gas density relay body , And communicate with the housing of the gas density relay body, the gas hood and the housing together form a cavity, and the oxygen sensor and/or nitrogen sensor are arranged in the gas hood; The control unit monitors the oxygen concentration and/or nitrogen concentration in the housing through the oxygen sensor and/or nitrogen sensor. When the monitored oxygen concentration and/or nitrogen concentration is lower than the set preset threshold, the intelligent control unit issues a gas leak alarm Signal and/or information, or, when the monitored oxygen concentration and/or nitrogen concentration is lower than the normal oxygen concentration and/or nitrogen concentration, the intelligent control unit sends out a gas leak alarm signal and/or information; or,

The sealing performance detection unit includes an SF6 diagnostic sensor, which is arranged in the housing of the gas density relay body; or, the sealing performance detection unit includes an SF6 diagnostic sensor and a gas hood, and the gas hood is arranged on the gas density relay. The outside of the body is connected with the housing of the gas density relay body, the gas hood and the housing form a cavity together, and the SF6 diagnostic sensor is arranged in the gas hood; the intelligent control The unit monitors the SF6 gas concentration in the shell through the SF6 diagnostic sensor. When the monitored SF6 gas concentration is higher than the set preset threshold, the intelligent control unit sends out a gas leak alarm signal and/or information, or the monitored SF6 gas When the concentration is higher than the normal SF6 gas concentration, the intelligent control unit sends out a gas leakage alarm signal and/or information.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 16, characterized in that: the gas density relay further comprises a gas leakage shut-off element and a contact isolation unit, and the gas leakage shut-off piece and contact isolation unit The units are respectively connected to the intelligent control unit; wherein one end of the air leakage shut-off element is connected to the electrical equipment, and the other end is connected to the gas density relay body, and the air leakage shut-off element is configured to act as a gas density relay. When there is a problem with the sealing performance of the body, it is used to close the gas circuit connecting the electrical equipment and the gas density relay body; the contact isolation unit includes an isolation connection circuit, and the isolation connection circuit connects the contacts of the gas density relay body and A contact signal control circuit, and the contact isolation unit is configured to disconnect the contact of the gas density relay body from the contact signal control circuit when the gas leakage shutoff is closed.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 17, characterized in that: the leakage shut-off component includes one of an electric control valve, an electromagnetic valve, an electric control self-sealing valve, and a temperature control valve.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 17, wherein the gas density relay further comprises a gas density detection sensor on the equipment side, and the gas density detection sensor on the equipment side is set at the air leakage gate. On the side where the broken piece is connected to the electrical equipment, the equipment-side gas density detection sensor is connected to the intelligent control unit, and is configured to monitor the gas density value P SB20 of the electrical equipment;

When the gas leakage shutoff is closed, if the gas density value P SB20 of the electrical device monitored by the gas density detection sensor on the device side is greater than the preset threshold, the contact isolation unit cuts off the isolation connection circuit to make the gas density relay body If the gas density value P SB20 of the electrical device monitored by the gas density detection sensor on the device side is less than or equal to the preset threshold, the isolation connection circuit is closed to make the gas density relay body The contact is connected with the contact signal control circuit.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 17, characterized in that: the online verification contact signal sampling unit comprises a first connection circuit and a second connection circuit, and the first connection circuit is connected The contact of the gas density relay body and the contact signal control circuit, the second connection circuit connects the contact of the gas density relay body and the intelligent control unit; in the non-checking state, the second connection circuit is broken Open, the first connection circuit is closed; in the verification state, the online verification contact signal sampling unit cuts off the first connection circuit, communicates with the second connection circuit, and connects the contact of the gas density relay body Connect with the intelligent control unit.
The gas density relay for intelligent monitoring of the whole life cycle of claim 20, wherein the first connection circuit comprises a first relay, the second connection circuit comprises a second relay, and the first relay At least one normally closed contact is provided, the second relay is provided with at least one normally open contact, the normally closed contact and the normally open contact maintain opposite switching states; the normally closed contact is connected in series with the contact signal control In the circuit, the normally open contact is connected to the contact of the gas density relay body; in the non-calibrated state, the normally closed contact is closed, the normally open contact is disconnected, and the gas density relay monitors the contact point in real time. The output state of the contact; in the verification state, the normally closed contact is open, the normally open contact is closed, and the contact of the gas density relay body is connected to the intelligent control unit through the normally open contact.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 21, characterized in that: the gas density relay further comprises a contact resistance detection unit, and the contact resistance detection unit comprises a third relay, a constant current source, Amplifier and A/D converter; wherein, the third relay includes at least one second normally open contact; the constant current source and the amplifier are connected in parallel to the two ends of the contact of the gas density relay body through the second normally open contact, and the A/ The D converter is connected in series between the output terminal of the amplifier and the intelligent control unit;

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

In the verification state, the normally closed contact is opened, the normally open contact is opened, the second normally open contact is closed, and the constant current source and the amplifier are connected in parallel to the contact of the gas density relay body Above, the contact of the gas density relay body is connected to the intelligent control unit through the second normally open contact, an amplifier and an A/D converter.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 21, characterized in that: the gas density relay further comprises an insulation performance detection unit, and the insulation performance detection unit comprises a fourth relay, a voltage exciter, Current detector, amplifier and A/D converter; wherein, the fourth relay includes a third normally open contact; the contact of the gas density relay body is connected to one end of the voltage exciter through the third normally open contact, and the voltage exciter The other end is grounded through the current detector, the amplifier is connected in parallel to both ends of the current detector, and the A/D converter is connected in series between the output end of the amplifier and the intelligent control unit;

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

In the verification state, the normally closed contact is opened, the normally open contact is opened, the third normally open contact is closed, and the voltage exciter and current detector are connected in series to the contact of the gas density relay body Above, the contact of the gas density relay body is connected to the intelligent control unit through the third normally open contact, voltage exciter, amplifier and A/D converter.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: the gas density relay also has a comparison density value output signal, and the comparison density value output signal is corresponding to the intelligent control unit Connection; 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, and the comparison density value output signal is the first A density value PS20, and the gas density value collected by the gas density detection sensor is a second density value PJ20. The intelligent control unit and/or background compares the first density value PS20 with the second density value PJ20 to obtain Density difference |PJ20-PS20|; When the density difference |PJ20-PS20| is within its preset threshold, the current working state of the monitoring part of the gas density relay is the normal working state, otherwise, it is the abnormal working state; or,

The gas density relay also includes a camera, which obtains the pointer display value or number display value of the gas density relay body through image recognition technology, which is the first density value PZ20, and the gas density value collected by the gas density detection sensor The second density value PJ20, the intelligent control unit and/or the background compares the first density value PZ20 with the second density value PJ20 to obtain the density difference |PJ20-PZ20|; if the density difference |PJ20-PZ20| Within the preset threshold, the current working state of the monitoring part of the gas density relay is a normal working state, otherwise, it is an abnormal working state.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the intelligent control unit diagnoses the state of the gas density detection sensor, the number of alarm actions of the gas density relay body, One or more of the number of locking actions of the gas density relay body, the contact misoperation record of the gas density relay body, and the contact rejection record of the gas density relay body.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the intelligent control unit obtains the gas density value collected by the gas density detection sensor; or, the intelligent control unit obtains the gas density value collected by the gas density detection sensor; The pressure value and temperature value collected by the gas density detection sensor complete the online monitoring of the gas density of the monitored electrical equipment by the gas density relay.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the intelligent control unit acquires that the gas density detection sensor collects when the gas density relay body generates a contact signal action or switch. To complete the online verification of the gas density relay; or,

The intelligent control unit obtains the pressure value and temperature value collected by the gas density detection sensor when the gas density relay body generates a contact signal action or switching, and converts it into a pressure value corresponding to 20°C according to the gas pressure-temperature characteristic, That is, the gas density value, which completes the online verification of the gas density relay.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, wherein the intelligent control unit receives the density value P 20 monitored by the gas density detection sensor, and if the density value P 20 ≤ preset Set the threshold density value P 20SD , the intelligent control unit or the background sends out liquefaction notice signals and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit receives the temperature value T monitored by the gas density detection sensor, and if the temperature value T ≤ the preset threshold temperature value T SD , the intelligent control unit or the background sends out a liquefaction notice signal and/or information, and/or notice The time of gas liquefaction, and/or the duration of the notice of gas liquefaction; or,

The intelligent control unit receives the pressure value P monitored by the gas density detection sensor, and within a set time period, if the pressure change value ΔP ≥ the preset threshold pressure change value ΔP SD , the intelligent control unit or the background sends a liquefaction notice Signals and/or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit receives the pressure value P monitored by the gas density detection sensor. At a specific temperature value T TD , if the pressure value P ≤ a preset threshold pressure value P SD , the intelligent control unit or the background sends a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding density curve for display and storage according to the received density value information collected by the gas density detection sensor, judges or diagnoses the density curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding temperature curve for display and storage according to the received temperature value information collected by the gas density detection sensor, judges or diagnoses the temperature curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction; or,

The intelligent control unit generates a corresponding pressure curve for display and storage according to the pressure value information collected by the gas density detection sensor, judges or diagnoses the pressure curve, and the intelligent control unit or the background sends out a liquefaction notice signal and / Or information, and/or notice the time of gas liquefaction, and/or notice the duration of gas liquefaction.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: the intelligent control unit further comprises an edge calculation unit, and the edge calculation unit combines the pressure value and temperature monitored by the gas density detection sensor Value, and/or gas density value for in-depth calculation processing, the obtained information and/or monitoring value includes accurate density value P 20 accurate day , P 20 accurate week , P 20 accurate season , P 20 accurate month , P 20 accurate year , Density value P 20 , pressure value P, temperature value T, ambient temperature value T environment , gas internal temperature value T internal , maximum temperature difference value, annual maximum temperature value, annual minimum temperature value, replenishment time, replenishment quality, leakage One or more of L leak rate year , L leak rate season , L leak rate month , L leak rate week , L leak rate day .
The gas density relay for intelligent monitoring of the entire life cycle of claim 29, wherein the depth calculation processing comprises: the edge calculation unit adopts an average value for the gas density values monitored within a set time interval. The average value P 20 average of the gas density value P 20 is calculated by the method, and the average value P 20 average is the accurate density value P 20 accurate ; or, the edge calculation unit calculates the gas density value P 20 monitored within the set time interval. 20 Perform Fourier transform, convert it into the corresponding frequency spectrum, filter out the periodic components, and then calculate the accurate density value P 20 is accurate ; wherein, the P 20 corresponds to the gas density value monitored in real time, and the P 20 is accurate on the exact density value corresponding to an annual interval, the P-20 is a quaternary accurate density value corresponding to a quarter of the exact time interval, the P 20 is accurately dated accurate density value corresponding to the time interval of one month, the P The 20 exact week corresponds to the accurate density value of one week interval, and the P 20 exact day corresponds to the accurate density value of one day interval.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 30, wherein the depth calculation processing further comprises: the edge calculation unit calculates the gas leakage rate L of the monitored electrical equipment, and the Air leakage rate L=ΔP 20t /t=(P 20 accurate before t- P 20 accurate t )/t, where: t is the set time interval, ΔP 20t is the change in density value within the time interval t, P 20 accurate t before is the accurate density value in the previous time interval, P 20 accurate t is the accurate density value in the current time interval; where the L air leakage rate year corresponds to the air leakage rate in an annual time interval, The L air leakage rate season corresponds to the air leakage rate of a quarterly time interval, the L air leakage rate month corresponds to the air leakage rate of a monthly time interval, and the L air leakage rate week corresponds to the accurate leakage rate of a week time interval. The air leakage rate, the L air leakage rate day corresponds to the air leakage rate at a time interval of one day.
The gas density relay 31 is one of the life-cycle of the intelligent monitoring claims, characterized in that the depth calculation process further comprising: an edge calculating unit calculates the time qi electrical equipment monitored time T qi , Air supplement time T air supplement time =(P 20 accurate- P 20 air supplement )/L, where P 20 air supplement is the density value that needs to be air supplemented; and/or the edge calculation unit calculates and monitors electrical equipment requires total gas plenum total mass Q = ρ need × V, formula, mass density [rho] need to require qi, qi required to obtain the density value of qi and gas characteristics P 20, V air chamber volume of electrical equipment; current gas mass and the edge calculation unit calculates the monitored electrical device currently plenum Q = ρ currently × V, where, [rho] is the current density of the current mass of gas, according to the current monitoring the gas density value P 20 and gas properties obtained; calculated by the total mass of the total gas Q and Q current gas mass calculated current gas mass qi qi Q = Q total -Q present.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: the intelligent control unit and the online verification unit perform online on the contact of the gas density relay body according to the set temperature or/season. Verification; the intelligent control unit separately obtains the gas density values P DT20 , P collected by the gas density detection sensor when the gas density relay body generates contact signal action or switching at 20° C., high temperature TH and/or low temperature TL DTH20 and/or P DTL20 to complete the temperature compensation test of the gas density relay;

The intelligent control unit or the background receives the data of the temperature compensation test, and if the error value |P DT20 -P DTH20 | is within its preset threshold, the high temperature temperature compensation of the gas density relay is qualified, otherwise, it is unqualified; And/or if the error value (P DT20 -P DTH20 )>0, the high temperature compensation of the gas density relay is under compensation, otherwise, it is over compensation; or,

The intelligent control unit or the background receives the data of the temperature compensation test. If the error value |P DBZ20 -P DTH20 | is within its preset threshold, where P DBZ20 is the standard contact signal action value, the high temperature temperature of the gas density relay The compensation is qualified, otherwise, it is unqualified; and/or if the error value (P DBZ20 -P DTH20 )>0, the high temperature temperature compensation of the gas density relay is under compensation, otherwise, it is over compensation; or,

The intelligent control unit or the background receives the data of the temperature compensation test, and if the error value |P DT20 -P DTL20 | is within its preset threshold, the low temperature temperature compensation of the gas density relay is qualified, otherwise, it is not qualified; And/or if the error value (P DT20 -P DTL20 )>0, the low temperature compensation of the gas density relay is over compensation, otherwise, it is under compensation; or,

The intelligent control unit or the background receives the temperature compensation test data, if the error value |P DBZ20 -P DTL20 | is within its preset threshold, where P DBZ20 is the standard contact signal action value, then the low temperature temperature compensation of the gas density relay It is qualified, otherwise, it is unqualified; and/or if the error value (P DBZ20 -P DTL20 )>0, the low-temperature temperature compensation of the gas density relay is over-compensation, otherwise, it is under-compensation.
The gas density relay for intelligent monitoring of the whole life cycle according to claim 1, characterized in that: at least two of the gas density relays are connected to a remote background detection system through a hub and a protocol converter in sequence; wherein, the The gas density relay is installed on the electrical equipment corresponding to the gas chamber.
A method for realizing a gas density relay for intelligent monitoring of a full life cycle according to claim 1, characterized in that it comprises:

Connecting the gas path of the pressure regulating mechanism with the gas density relay body, the pressure regulating mechanism regulates the pressure rise and fall of the gas density relay body, so that the gas density relay body generates a contact signal action;

Connect the gas density detection sensor with the gas density relay body on the gas path;

The online verification contact signal sampling unit is directly or indirectly connected to the gas density relay body, and the online verification contact signal sampling unit samples the contact signal when the gas density relay body generates a contact signal action;

Connect one end of the valve to electrical equipment, connect the other end of the valve to the gas density relay body, or connect the other end of the valve to the gas circuit of the pressure regulating mechanism, thereby connecting the valve to the gas density relay body;

Install the oil leakage diagnostic detector inside or outside the gas density relay body to collect oil leakage information of the gas density relay body;

Connect the intelligent control unit to the oil leakage diagnosis detector, the pressure adjustment mechanism, the gas density detection sensor and the online verification contact signal sampling unit, respectively, to receive and/or calculate the oil leakage diagnosis The data and/or information monitored by the detector complete the control of the pressure adjustment mechanism, the pressure value collection, the temperature value collection, and/or the gas density value collection, and the detection of the contact signal action value of the gas density relay body and/ Or contact signal return value.
The method for implementing a gas density relay with intelligent monitoring throughout its life cycle according to claim 35, wherein the gas density relay further comprises a sealing performance detection unit, and the sealing performance detection unit is configured to collect gas The gas pressure change, or current change, or gas concentration change, or gas density value change of the gas path of the density relay body or the gas inside the housing is changed, and the gas leakage information of the gas density relay body is acquired, and the implementation method further includes:

The sealing performance detection unit is arranged inside or outside 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 the data and/or information monitored by the sealing performance detection unit and performs a diagnosis to obtain the current gas leakage state of the gas density relay body; or, the data to be received by the intelligent control unit And/or the information is uploaded to the backstage, and the backstage diagnoses the data and/or information monitored by the sealing performance detection unit received and/or calculated, and obtains the current gas leakage state of the gas density relay body.