CN110416022A - A kind of multifunctional gas density monitor - Google Patents
A kind of multifunctional gas density monitor Download PDFInfo
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- CN110416022A CN110416022A CN201910830224.8A CN201910830224A CN110416022A CN 110416022 A CN110416022 A CN 110416022A CN 201910830224 A CN201910830224 A CN 201910830224A CN 110416022 A CN110416022 A CN 110416022A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
- G01N9/266—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences for determining gas density
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/36—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by curled flexible tube, e.g. Bourdon tube
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Abstract
The application provides a kind of multifunctional gas density monitor, including shell, and pedestal, pressure detector, temperature compensating element, at least one signal generator and the equipment jointing for connecting electrical equipment being disposed in the housing, it further include on-line testing contact point signal sampling unit, the on-line testing contact point signal sampling unit is connected with the signal generator, and the contact point signal generated when contact movement occurs for the multifunctional gas density monitor at a temperature of sampling environment.The on-line testing contact point signal sampling unit is relatively isolated on circuit in non-verification state with the contact of multifunctional gas density monitor；In the state of verification, contact point signal control loop is cut off, it is ensured that the contact point signal of multifunctional gas density monitor will not upload, and will not influence the safe operation of power grid.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a multifunctional gas density relay applied to high-voltage and medium-voltage electrical equipment.
Background
The gas density relay is used for monitoring and controlling the density of insulating gas in high-voltage and medium-voltage electrical equipment, a contact signal control loop is arranged in the gas density relay, a gas path of the gas density relay is communicated with a gas chamber of the high-voltage and medium-voltage electrical equipment, when gas leakage is detected, a contact of the gas density relay acts to generate a contact signal, and the contact signal control loop gives an alarm or locks according to the contact signal, so that the safe operation protection of the electrical equipment is realized.
At present, SF6 (sulfur hexafluoride) electrical equipment is widely applied to electric power departments and industrial and mining enterprises, and rapid development of the electric power industry is promoted. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and the usage amount of SF6 electrical equipment is more and more. The SF6 gas plays a role in arc extinction and insulation in high-voltage electrical equipment, and the safe operation of the SF6 high-voltage electrical equipment is seriously influenced if the density of the SF6 gas in the high-voltage electrical equipment is reduced and the micro water content is exceeded: 1) the reduction of SF6 gas density to some extent will result in loss of insulation and arc extinguishing properties. 2) Under the participation of some metal substances, SF6 gas can generate hydrolysis reaction with water at the high temperature of more than 200 ℃ to generate active HF and SOF2The insulation and metal parts are corroded and generate a large amount of heat, so that the pressure of the gas chamber is increased. 3) When the temperature is reduced, excessive moisture can form condensed water, so that the surface insulation strength of the insulation part is obviously reduced, and even flashover is caused, thereby causing serious harm. Therefore, the grid operating regulations impose that equipment must be operated before and during operationThe density and moisture content of the SF6 gas were measured periodically.
With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the online monitoring of the gas density and micro-water content state of the SF6 electrical equipment has important practical significance. With the continuous and vigorous development of the intelligent power grid in China, intelligent high-voltage electrical equipment is used as an important component and a key node of an intelligent substation, and plays a significant role in improving the safety of the intelligent power grid. At present, most of high-voltage electrical equipment is SF6 gas insulation equipment, and if the gas density is reduced (caused by leakage and the like), the electrical performance of the equipment is seriously influenced, and serious hidden danger is caused to safe operation. Currently, on-line monitoring of gas density values in SF6 high-voltage electrical equipment is very common, and existing gas density monitoring systems (devices) are basically: 1) the remote transmission type SF6 gas density relay is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. 2) The gas density transmitter is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. The SF6 gas density relay is the core and key component. However, because the environment for the field operation of the high-voltage transformer substation is severe, particularly the electromagnetic interference is very strong, in the currently used gas density monitoring system (device), the remote transmission type SF6 gas density relay is composed of a mechanical density relay and an electronic remote transmission part; in addition, the traditional mechanical density relay is reserved in a power grid system applying the gas density transmitter. The mechanical density relay is provided with one group, two groups or three groups of mechanical contacts, and when the pressure reaches the state of alarming, locking or overpressure, information is transmitted to a target equipment terminal in time through a contact connecting circuit, so that the safe operation of the equipment is ensured. Meanwhile, the monitoring system is also provided with a safe and reliable circuit transmission function, an effective platform is established for realizing real-time data remote data reading and information monitoring, and information such as pressure, temperature, density and the like can be transmitted to target equipment (such as a computer terminal) in time to realize online monitoring.
The gas density relay on the SF6 electrical equipment is regularly checked, which is a necessary measure for preventing the gas density relay from being in the bud and ensuring the safe and reliable operation of the SF6 electrical equipment; the 'electric power preventive test regulations' and the 'twenty-five key requirements for preventing serious accidents in electric power production' both require that the gas density relay be periodically checked. From the actual operation condition, the periodic verification of the gas density relay is one of the necessary means for ensuring the safe and reliable operation of the power equipment. Therefore, the calibration of the SF6 gas density relay is very important and popular in the power system, and various power supply companies, power plants and large-scale industrial and mining enterprises are implemented. And power supply companies, power plants and large-scale industrial and mining enterprises need to be equipped with testers, equipment vehicles and high-value SF6 gas for completing the field verification and detection work of the gas density relay. Including power failure and business loss during detection, the detection cost of each high-voltage switch station, which is allocated every year, is about tens of thousands to tens of thousands yuan. In addition, if the field check of the detection personnel is not standard in operation, potential safety hazards also exist. Therefore, it is necessary to innovate the existing gas density relay, so that the gas density relay for realizing the online gas density monitoring or the monitoring system formed by the gas density relay also has the checking function of the gas density relay, and further regular checking work of the (mechanical) gas density relay is completed, no maintainer is required to arrive at the site, the efficiency is greatly improved, and the cost is reduced. Meanwhile, the micro-water value in the gas chamber of the electrical equipment can be accurately measured in the online self-checking gas density relay or a monitoring system consisting of the gas density relay.
Disclosure of Invention
The invention aims to provide a multifunctional gas density relay applied to high-voltage and medium-voltage electrical equipment, which is used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment and completing on-line verification of the gas density relay, thereby improving the efficiency, reducing the operation and maintenance cost and ensuring the safe operation of a power grid.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-functional gas density relay comprising: the multifunctional gas density relay comprises a shell, a base, a pressure detector, a temperature compensation element, at least one signal generator, an equipment connecting joint and an online check joint signal sampling unit, wherein the base, the pressure detector, the temperature compensation element, the at least one signal generator and the equipment connecting joint are arranged in the shell, the equipment connecting joint is used for connecting electrical equipment, and the online check joint signal sampling unit is connected with the signal generator and is used for sampling joint signals generated when the multifunctional gas density relay generates joint actions;
the online check contact signal sampling unit comprises a first connecting circuit and a second connecting circuit; the first connecting circuit is connected with a contact of the multifunctional gas density relay and a contact signal control circuit, and the second connecting circuit is connected with the contact of the multifunctional gas density relay and the output end of the on-line checking contact signal sampling unit;
in a non-checking state, the contact is a normally open density relay, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the first connecting circuit is disconnected, the second connecting circuit is communicated, and the contact of the gas density relay is connected with the output end of the online checking contact signal sampling unit; or,
in a non-checking state, the contact is a normally closed density relay, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the contact signal control loop is closed, the connection between the contact of the gas density relay and the contact signal control loop is disconnected, the second connecting circuit is communicated, and the contact of the gas density relay is connected with the output end of the online checking contact signal sampling unit;
wherein the contact signal comprises an alarm, and/or a latch.
Preferably, the signal generator comprises a microswitch or a magnetic auxiliary electric contact, and the multifunctional gas density relay outputs the contact signal through the signal generator.
Preferably, the temperature compensation element adopts a temperature compensation sheet or gas enclosed in the shell.
Preferably, the pressure detector comprises a bourdon tube or a bellows.
Preferably, the pressure detector is fixed to the base and communicates with the base.
Preferably, the online verification contact signal sampling unit is arranged on the equipment connecting joint, or on the shell, or in the shell.
Preferably, the multifunctional gas density relay further comprises a display mechanism, wherein the display mechanism comprises a movement, a pointer and a dial, and the movement is fixed in the shell; one end of the temperature compensation element is also connected with the movement through a connecting rod or directly connected with the movement; the pointer is arranged on the movement and in front of the dial, and the pointer is combined with the dial to display the gas density value; and/or
The display mechanism comprises a digital device or a liquid crystal device with a display value display.
Preferably, the first connection circuit comprises a first relay, the second connection circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact maintain opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay;
in a non-checking state, the normally closed contact is closed, the normally open contact is opened, and the gas density relay monitors the output state of the contact in real time; under the check-up state, normally closed contact disconnection, normally open contact is closed, the contact of gas density relay passes through normally open contact with online check-up contact signal sampling unit's output is connected.
More preferably, the first relay and the second relay are two independent relays, or the same relay.
Preferably, the online check contact signal sampling unit is electrically and optically isolated from the contact of the gas density relay.
Preferably, the second connection circuit comprises a photocoupler and a resistor, wherein the photocoupler comprises a light emitting diode and a phototriode; the light emitting diode and the contact of the gas density relay are connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of the phototriode is connected with the output end of the on-line checking contact signal sampling unit, and the collector of the phototriode is also connected with a power supply through the resistor;
when the contact is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level;
when the contact is opened, the closed loop is opened, the light emitting diode does not emit light, the phototriode is cut off, and the collector of the phototriode outputs high level.
Preferably, the second connection circuit includes a first photocoupler and a second photocoupler;
the light emitting diode of the first photoelectric coupler and the light emitting diode of the second photoelectric coupler are respectively connected in parallel through a current limiting resistor, and are connected in series with the contact of the gas density relay after being connected in parallel to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler and the second photoelectric coupler are opposite;
the collector of the phototriode of the first photoelectric coupler and the collector of the phototriode of the second photoelectric coupler are connected with a power supply through a divider resistor, and the emitter of the phototriode of the first photoelectric coupler and the emitter of the phototriode of the second photoelectric coupler are connected to form the output end of the on-line checking contact signal sampling unit and are grounded through a resistor;
when the contact is closed, a closed loop is electrified, the first photoelectric coupler is conducted, the second photoelectric coupler is cut off, and the emitter of the phototriode of the first photoelectric coupler outputs high level; or the first photoelectric coupler is cut off, the second photoelectric coupler is conducted, and an emitter of a phototriode of the second photoelectric coupler outputs a high level;
when the contact is disconnected, the closed loop is powered off, the first photoelectric coupler and the second photoelectric coupler are both cut off, and the emitters of the phototriodes of the first photoelectric coupler and the second photoelectric coupler output low levels.
More preferably, the second connection circuit further includes a first voltage regulator diode group and a second voltage regulator diode group, the first voltage regulator diode group and the second voltage regulator diode group are connected in parallel to the contact signal control loop, and the connection directions of the first voltage regulator diode group and the second voltage regulator diode group are opposite; the first voltage stabilizing diode group and the second voltage stabilizing diode group are respectively formed by connecting one, two or more than two voltage stabilizing diodes in series.
Further, the first zener diode group comprises a first zener diode and a second zener diode which are connected in series, and a cathode of the first zener diode is connected to an anode of the second zener diode; the second voltage stabilizing diode group comprises a third voltage stabilizing diode and a fourth voltage stabilizing diode which are connected in series, and the anode of the third voltage stabilizing diode is connected with the cathode of the fourth voltage stabilizing diode.
Preferably, the second connection circuit further comprises a first hall current sensor and a second hall current sensor, the first hall current sensor, the second hall current sensor and the contact of the gas density relay are connected in series to form a closed loop, and the contact of the gas density relay is connected between the first hall current sensor and the second hall current sensor; the output end of the first Hall current sensor and the output end of the second Hall current sensor are both connected with the output end of the on-line checking contact signal sampling unit;
when the contact is closed, a closed loop is electrified, and current flows between the first Hall current sensor and the second Hall current sensor to generate induced potential;
when the contact is opened, the closed loop is powered off, no current flows between the first Hall current sensor and the second Hall current sensor, and the generated induced potential is zero.
Preferably, the second connection circuit includes: the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier;
first silicon controlled rectifier, third silicon controlled rectifier establish ties, and the series connection circuit that second silicon controlled rectifier, fourth silicon controlled rectifier establish ties the back and first silicon controlled rectifier, third silicon controlled rectifier constitute forms the series-parallel closed circuit, the one end of gas density relay's contact pass through the circuit with circuit electricity between first silicon controlled rectifier, the third silicon controlled rectifier is connected, the other end pass through the circuit with circuit electricity between second silicon controlled rectifier, the fourth silicon controlled rectifier is connected.
More preferably, the cathode of the first controllable silicon is connected with the output end of the online check contact signal sampling unit, and the anode of the first controllable silicon is connected with the cathode of the third controllable silicon; the control electrodes of the first silicon controlled rectifier and the third silicon controlled rectifier are connected with the output end of the online check contact signal sampling unit; the cathode of the second controllable silicon is connected with the output end of the on-line checking contact signal sampling unit, and the anode of the second controllable silicon is connected with the cathode of the fourth controllable silicon; and control electrodes of the second controllable silicon and the fourth controllable silicon are connected with the output end of the online check contact signal sampling unit.
Preferably, the online checking contact signal sampling unit is provided with at least two independent sampling contacts, at least two contacts of the gas density relay can be checked automatically at the same time, and continuous measurement is carried out without replacing or reselecting the contacts; wherein,
the contacts include, but are not limited to, one of an alarm contact, an alarm contact + latching 1 contact + latching 2 contact, an alarm contact + latching contact + overpressure contact.
More preferably, the online verification contact signal sampling unit is provided with at least one independent sampling contact, so that online verification of the single-contact density relay is completed.
Preferably, the online verification contact signal sampling unit is used for testing the contact action value of the multifunctional gas density relay or the switching value (the gas density value when the contact is switched to the open-close state) of the contact action value not lower than 24V, namely, during verification, the voltage not lower than 24V is applied between corresponding terminals of the contact.
Preferably, the online check joint signal sampling unit further comprises an anti-interference component.
Preferably, the on-line checking contact signal sampling unit is further provided with a temperature protection device for the components, and the temperature protection device is used for ensuring that the components can work reliably at low or high ambient temperature.
More preferably, the temperature protection device comprises a heater and/or a heat sink (e.g. a fan), the heater being switched on when the temperature is below a set value and the heat sink (e.g. a fan) being switched on when the temperature is above the set value.
Preferably, the multifunctional gas density relay directly comprises a pressure sensor and a temperature sensor, or comprises a density measuring sensor adopting quartz tuning fork technology; or a gas density transmitter consisting of a pressure sensor and a temperature sensor.
Preferably, the multifunctional gas density relay further comprises at least one pressure sensor, and the pressure sensor is communicated with the multifunctional gas density relay on a gas path and is used for collecting a pressure value; and/or, the multi-functional gas density relay still includes at least one temperature sensor, temperature sensor with the multi-functional gas density relay is connected for gather the temperature value.
More preferably, the temperature sensor is arranged on or in the housing of the multifunctional gas density relay or outside the housing.
More preferably, at least one temperature sensor is arranged near or on or integrated in the temperature compensation element of the multifunctional gas density relay. Preferably, at least one temperature sensor is arranged at one end of a pressure detector of the multifunctional gas density relay, which is close to the temperature compensation element, and the pressure detector comprises a bourdon tube or a corrugated tube.
More preferably, the pressure sensor and the temperature sensor are of an integrated structure; or the pressure sensor and the temperature sensor form an integrated structure with a remote transmission function, and the pressure value, the temperature value and/or the gas density value are/is monitored in a remote transmission mode, and/or the contact signal state of the multifunctional gas density relay is/are transmitted in a remote transmission mode.
More preferably, the multifunctional gas density relay comprises at least two pressure sensors, and the pressure values acquired by the pressure sensors are compared to complete mutual verification among the pressure sensors.
More preferably, the multifunctional gas density relay comprises at least two temperature sensors, and the temperature values acquired by the temperature sensors are compared to complete mutual verification among the temperature sensors.
More preferably, the multifunctional gas density relay comprises at least one pressure sensor and at least one temperature sensor; randomly arranging and combining the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors, converting the combinations into a plurality of corresponding pressure values at 20 ℃ according to gas pressure-temperature characteristics, namely gas density values, and comparing the gas density values to finish the mutual verification of the pressure sensors and the temperature sensors; or the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors are subjected to all permutation and combination, and each combination is converted into a plurality of corresponding pressure values at 20 ℃ according to the gas pressure-temperature characteristic, namely gas density values, and each gas density value is compared to complete the mutual verification of each pressure sensor and each temperature sensor; or comparing a plurality of gas density values obtained by each pressure sensor and each temperature sensor with comparison density value output signals output by the gas density relay to complete mutual verification of the gas density relay, each pressure sensor and each temperature sensor; or comparing the gas density values, the pressure values and the temperature values obtained by the pressure sensors and the temperature sensors to finish the mutual verification of the gas density relay, the pressure sensors and the temperature sensors.
More preferably, multi-functional gas density relay still includes intelligence accuse unit, intelligence accuse unit with online check-up contact signal sampling unit pressure sensor, and/or temperature sensor is connected for acquire when multi-functional gas density relay takes place the contact action pressure value and the temperature value that pressure sensor, temperature sensor gathered to according to the conversion of gas pressure-temperature characteristic becomes the pressure value that corresponds 20 ℃, and gas density value is promptly, accomplishes multi-functional gas density relay's online check-up.
Preferably, the multifunctional gas density relay further comprises a pressure adjusting mechanism, a gas path of the pressure adjusting mechanism is communicated with the pressure detector of the gas density relay, and the pressure adjusting mechanism is configured to adjust the pressure rise and fall of the gas path of the gas density relay, so that the multifunctional gas density relay generates contact action.
More preferably, the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element is arranged outside or inside the closed air chamber, and the temperature of the gas in the closed air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the multifunctional gas density relay is increased or decreased.
Further, the heating element, and/or the cooling element is a semiconductor.
Further, the pressure regulating mechanism further comprises a heat preservation piece, and the heat preservation piece is arranged outside the closed air chamber.
More preferably, during verification, the pressure adjusting mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with an air path of the multifunctional gas density relay; the cavity is internally provided with a piston, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod and then drives the piston to move in the cavity.
More preferably, during verification, the pressure adjusting mechanism is a closed air chamber, a piston is arranged inside the closed air chamber, the piston is in sealing contact with the inner wall of the closed air chamber, and a driving component is arranged outside the closed air chamber and pushes the piston to move in the closed air chamber through electromagnetic force.
More preferably, the pressure adjustment mechanism is an air bag having one end connected to a driving member, and the air bag is driven by the driving member to generate a volume change.
More preferably, the pressure adjusting mechanism is a bellows, one end of the bellows is communicated with the gas density relay, and the other end of the bellows extends and contracts under the driving of the driving part.
The driving component of the pressure adjusting mechanism includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or stepping motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
More preferably, the pressure regulating mechanism is a purge valve.
Further, the pressure regulating mechanism further comprises a flow valve for controlling the gas release flow.
Further, the air release valve is an electromagnetic valve or an electric valve, or other air release valves realized by electric or pneumatic means.
More preferably, the pressure regulating mechanism is a compressor.
More preferably, the pressure regulating mechanism is a pump. More preferably, the pump includes, but is not limited to, a pressurizing pump, an electric air pump, or an electromagnetic air pump.
More preferably, the pressure regulating mechanism is sealed within a chamber or housing.
Preferably, the multifunctional gas density relay further comprises a valve, one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with a gas path of the multifunctional gas density relay.
More preferably, the valve is an electrically operated valve.
More preferably, the valve is a solenoid valve.
Further, the valve is a permanent magnet type electromagnetic valve.
More preferably, the valve is a piezoelectric valve, or a temperature control valve, or a novel valve which is made of intelligent memory materials and is opened or closed by electric heating.
More preferably, the valve is closed or opened in a hose bending or flattening mode.
More preferably, the valve is sealed within a chamber or housing.
More preferably, pressure sensors are respectively arranged on two sides of the air path of the valve; or, the two sides of the air passage of the valve are respectively provided with a pressure or density detector.
More preferably, the valve, the base, and the pressure detector are connected together by a connection pipe.
More preferably, the multifunctional gas density relay further comprises a multi-way joint, and the base and the pressure detector of the multifunctional gas density relay are arranged on the multi-way joint; or the equipment connecting joint and the valve of the multifunctional gas density relay are arranged on the multi-way joint; or the equipment connecting joint, the base and the valve of the multifunctional gas density relay are arranged on the multi-way joint.
Further, the multi-functional gas density relay still includes from sealing the valve, from sealing the valve and installing in on the many logical joint.
Preferably, the multifunctional gas density relay further comprises a micro-water sensor for online monitoring of the micro-water value of the gas.
Preferably, the multifunctional gas density relay further comprises a decomposition product sensor for on-line monitoring of gas decomposition products.
Preferably, the multifunctional gas density relay further comprises a communication module, and the multifunctional gas density relay realizes data remote transmission through the communication module.
More preferably, the communication mode of the communication module is wired or wireless.
Further, the wired communication mode comprises one or more of an RS232 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a PLC power carrier and a cable.
Further, the wireless communication mode comprises one or more of a 5G/NB-IOT communication module (such as 5G, NB-IOT), a 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication and sonar which are arranged in the sensor.
The electrical equipment includes SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmental protection gas electrical equipment or other insulating gas electrical equipment.
The multifunctional gas density relay comprises a bimetallic strip compensated gas density relay, a gas compensated gas density relay or a bimetallic strip and gas compensated mixed gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6 gas density relay, SF6 hybrid gas density relay, N2 gas density relay, other gas density relays, and the like.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the utility model provides a multi-functional gas density relay, includes the casing, and locates base, pressure detector, temperature compensation component, at least one signal generator in the casing and be used for connecting electrical equipment's equipment attach fitting, still include online check-up contact signal sampling unit, online check-up contact signal sampling unit with signal generator is connected for under the sampling ambient temperature the contact signal that produces when the contact action takes place for multi-functional gas density relay. The online checking contact signal sampling unit is relatively isolated from the contact of the multifunctional gas density relay on a circuit in a non-checking state; when in a checking state, the contact signal control loop is cut off, so that the contact signal of the multifunctional gas density relay is not uploaded, and the safe operation of a power grid is not influenced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a multifunctional gas density relay according to a first embodiment;
fig. 2 is a schematic structural view of a multifunctional gas density relay according to a second embodiment;
FIG. 3 is a schematic diagram of a control circuit of a multifunctional gas density relay according to a third embodiment;
FIG. 4 is a schematic structural diagram of a multifunctional gas density relay according to a fourth embodiment;
FIG. 5 is a schematic structural view of a multifunctional gas density relay according to the fifth embodiment;
fig. 6 is a schematic structural view of a multifunctional gas density relay according to the sixth embodiment;
FIG. 7 is a schematic structural view of a multifunctional gas density relay according to the seventh embodiment;
fig. 8 is a schematic structural view of a multifunctional gas density relay according to the eighth embodiment;
FIG. 9 is a schematic structural view of a multifunctional gas density relay in accordance with the ninth embodiment;
fig. 10 is a schematic structural view of a multifunctional gas density relay according to the tenth embodiment;
fig. 11 is a schematic structural view of a multifunctional gas density relay according to an eleventh embodiment;
FIG. 12 is a schematic structural view of a multifunctional gas density relay according to a twelfth embodiment;
fig. 13 is a schematic structural view of a multifunctional gas density relay according to a thirteenth embodiment;
FIG. 14 is a schematic diagram of a control circuit according to a fourteenth embodiment;
FIG. 15 is a schematic diagram of a control circuit according to the fifteenth embodiment;
FIG. 16 is a schematic diagram of a control circuit according to a sixteenth embodiment;
FIG. 17 is a schematic diagram of a control circuit according to the seventeenth embodiment;
fig. 18 is a schematic diagram of a control circuit according to an eighteenth embodiment.
Detailed Description
The invention provides a multifunctional gas density relay, which is further described in detail below by referring to the attached drawings and examples in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
fig. 1 is a schematic structural diagram of a multifunctional gas density relay according to an embodiment of the present invention. As shown in fig. 1, a multifunctional gas density relay 1 includes a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101. The gas density relay 1 is communicated with electrical equipment through the equipment connecting joint 1010, one end of the pressure detector 103 is fixed on the base 102 and communicated with the base 102, the other end of the pressure detector 103 is connected with one end of the temperature compensation element 104 through the end seat 108, the other end of the temperature compensation element 104 is provided with a beam, and the beam is provided with an adjusting piece for pushing the signal generator 109 and enabling a contact of the signal generator 109 to be connected or disconnected. The movement 105 is fixed on the base 102; the other end of the temperature compensation element 104 is also connected with the movement 105 through a connecting rod or directly connected with the movement 105; the pointer 106 is mounted on the core 105 and is arranged in front of the dial 107, and the pointer 106 displays the gas density value in combination with the dial 107. The gas density relay 1 may also comprise a digital device with a display or a liquid crystal device.
The gas density relay 1 further includes: the device comprises a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6 and an intelligent control unit 7. One end of the valve 4 is communicated with the equipment connecting joint 1010, and the other end of the valve 4 is communicated with the base 102; the pressure sensor 2 is communicated with a pressure detector 103 on an air path; the pressure adjusting mechanism 5 is communicated with the pressure detector 103; the valve 4 is connected with an intelligent control unit 7; the pressure adjusting mechanism 5 is connected with the intelligent control unit 7; the online checking contact signal sampling unit 6 is respectively connected with the signal generator 109 and the intelligent control unit 7, and is used for monitoring the contact state of the multifunctional gas density relay 1 and sending monitored contact state information (including an action state and a non-action state) to the intelligent control unit 7.
One end of the pressure detector 103 and one end of the temperature compensation element 104 are both fixed on the end seat 108, the other end of the pressure detector 103 is connected on the base 102, the other end of the temperature compensation element 104 is connected with the movement 105 through a display link or the other end of the temperature compensation element 104 is directly connected with the movement 105, and the pointer 106 is installed on the movement 105 and is arranged in front of the dial 107. The signal generator 109 may be a micro switch or a magnetic assisted electrical contact, and the contact signal of the gas density relay is output through the signal generator 109. The pressure detector 103 may employ a bourdon tube or a bellows tube. The temperature compensation element 104 may employ a compensation plate or a gas enclosed within a housing. The multifunctional gas density relay of the present invention may further comprise: an oil-filled type density relay, an oil-free type density relay, a gas density meter, a gas density switch, or a gas pressure gauge.
In this embodiment, the varying pressure and temperature are corrected based on the pressure detector 103 and by the temperature compensation element 104 to reflect the variation in the (sulphur hexafluoride) gas density. Under the pressure of the measured medium (sulfur hexafluoride) gas, due to the action of the temperature compensation element 104, when the density value of the (sulfur hexafluoride) gas changes, the pressure value of the (sulfur hexafluoride) gas also changes correspondingly, so that the tail end of the pressure detector 103 is forced to generate corresponding elastic deformation displacement, the elastic deformation displacement is transmitted to the core 105 by virtue of the temperature compensation element 104, the core 105 transmits the elastic deformation displacement to the pointer 106, the density value of the measured sulfur hexafluoride gas is indicated on the dial 107, and the signal generator 109 serves as an output alarm locking contact. The gas density relay 1 can then display the value of the (sulphur hexafluoride) gas density. If the sulfur hexafluoride gas density value is reduced, the pressure detector 103 generates corresponding reverse displacement, the reverse displacement is transmitted to the movement 105 through the temperature compensation element 104, the movement 105 is transmitted to the pointer 106, the pointer 106 moves towards the direction with small indicating value, the gas leakage degree is specifically displayed on the dial 107, and the signal generator 109 outputs (alarm locking) contact signals to monitor and control the sulfur hexafluoride gas density in equipment such as an electrical switch and the like, so that the electrical equipment can work safely. The valves 4 may be various and may be cut-off valves, such as ball valves, butterfly valves, gate valves, stop valves, plug valves, butterfly valves, needle valves, diaphragm valves, etc. If the ball valve is used, the self-sealing valve core can be rotated to drive the ball valve to close the air passage of the switch device, and the ball valve can be flexibly designed according to actual requirements. The valve 4 is automatic and can be verified manually or semi-manually.
Example two:
fig. 2 is a schematic structural diagram of a multifunctional gas density relay. As shown in fig. 2, in addition to the housing 101, and the base 102, the end seat 108, the pressure detector 103, the temperature compensation element 104, the plurality of signal generators 109, the movement 105, the pointer 106, the dial 107 and the device connection joint 1010 which are arranged in the housing 101, the present invention further includes: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7, multi-pass joint 9 and tonifying qi interface 10. The valve 4, the pressure sensor 2, the pressure regulating mechanism 5 and the air supply interface 10 are arranged on the multi-way joint 9. Specifically, an air inlet of the valve 4 is provided with an interface communicated with electrical equipment, the air inlet is hermetically connected to the electrical equipment and communicated with an air chamber of the electrical equipment, and an air outlet of the valve 4 is communicated with a pressure detector through a multi-way connector 9; the pressure sensor 2 is communicated with a pressure detector on a gas path through a multi-way joint 9; the pressure adjusting mechanism 5 is communicated with the pressure detector through a multi-way joint 9; the online check contact signal sampling unit 6 is respectively connected with the signal generator and the intelligent control unit 7; the valve 4, the pressure sensor 2, the temperature sensor 3 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7; the air supply interface 10 is communicated with the multi-way joint 9.
Wherein, multi-functional gas density relay 1 includes: a bimetallic strip compensated gas density relay, a gas compensated gas density relay, or a bimetallic strip and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; a density relay with indication (a density relay displayed by a pointer, a density relay displayed by a digital code, a density relay displayed by a liquid crystal) and a density relay without indication (namely a density switch); SF6 gas density relay, SF6 hybrid gas density relay, N2 gas density relay, other gas density relays, and the like.
Type of pressure sensor 2: absolute pressure sensors, relative pressure sensors, or both absolute and relative pressure sensors, may be several in number. The pressure sensor 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 induction coil of a Badon tube), a resistance pressure sensor (such as a pressure measurement sensor with slide wire resistance of a Badon tube), an analog pressure sensor or a digital pressure sensor. The pressure sensor is a pressure sensor, a pressure transmitter, and other pressure-sensitive elements, such as diffused silicon, sapphire, piezoelectric, and strain gauge (resistance strain gauge, ceramic strain gauge).
The temperature sensor 3 may be: a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be a thermal resistor and a thermocouple. In short, the temperature acquisition can be realized by various temperature sensing elements such as a temperature sensor, a temperature transmitter and the like.
The valve 4 can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic hydraulic, electrohydraulic, pneumatic hydraulic, spur gear and bevel gear drive; the valve can be operated according to the preset requirement under the action of pressure, temperature or other forms of sensing signals, or can be simply opened or closed without depending on the sensing signals, and the valve can make the opening and closing piece perform lifting, sliding, swinging or rotating motion by depending on a driving or automatic mechanism, so that the size of the flow passage area of the valve can be changed to realize the control function of the valve. The valve 4 can be driven by automatic valves, power-driven valves and manual valves. And the automatic valve may include: electromagnetic drive, electromagnetic-hydraulic drive, electro-hydraulic drive, turbine drive, spur gear drive, bevel gear drive, pneumatic drive, hydraulic drive, gas-hydraulic drive, electric motor (motor) drive. The valve 4 may be automatic or manual, semi-automatic. The verification process can be automatically completed or semi-automatically completed through manual cooperation. The valve 4 is connected directly or indirectly, integrally or separately, to the electrical equipment through a self-sealing valve, a manual valve, or a non-detachable valve. The valve 4 may be normally open or normally closed, or may be unidirectional or bidirectional, as desired. In short, the air passage is opened or closed through the electric control valve. The electric control valve can adopt the following modes: electromagnetic valve, electric control ball valve, electric control proportional valve, etc.
The pressure adjustment mechanism 5 of this embodiment is one end open-ended cavity, there is piston 51 in the cavity, piston 51 is equipped with sealing washer 510, piston 51's one end is connected with an regulation pole, drive unit 52 is connected to the outer end of adjusting the pole, piston 51's the other end stretches into in the opening, and with the inner wall of cavity contacts, drive unit 52 drive adjust the pole and then drive piston 51 is in the intracavity removes. The driving member 52 includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or step motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
The basic requirements or functions of the intelligent control unit 7 are as follows: the control of the valve 4, the control of the pressure regulating mechanism 5 and the signal acquisition are completed through the intelligent control unit 7. The realization is as follows: can detect the pressure value and temperature value when the contact acts, and convert into the corresponding pressure value P at 20 DEG C20(density value). Alternatively, the density value P at the time of contact operation can be directly detectedD20Completion of gas densityAnd (5) checking the electric appliance.
Of course, the intelligent control unit 7 can also realize: completing test data storage; and/or test data derivation; and/or the test data may be printed; and/or can be in data communication with an upper computer; and/or analog quantity and digital quantity information can be input. The intelligent control unit 7 also comprises a communication module, and the information such as test data and/or verification results is transmitted in a long distance through the communication module; when the rated pressure value of the gas density relay 1 outputs a signal, the intelligent control unit 7 simultaneously collects the current density value, and the calibration of the rated pressure value of the gas density relay 1 is completed.
Electrical equipment including SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmentally friendly gas electrical equipment, or other insulated gas electrical equipment. Specifically, the electrical equipment includes GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas insulated cabinets, ring main units, and the like.
The multifunctional gas density relay has the functions of pressure and temperature measurement and software conversion. On the premise of not influencing the safe operation of the electrical equipment, the action value and/or the return value of the alarm and/or the locking contact can be detected on line. Of course, the return value of the alarm and/or latch contact signal may not need to be tested as desired.
Example three:
fig. 3 is a schematic diagram of a control circuit of a multifunctional gas density relay. As shown in fig. 3, the online verification contact signal sampling unit 6 of the present embodiment is provided with a protection circuit, which includes a first connection circuit and a second connection circuit, the first connection circuit connects the contact (signal generator) of the gas density relay 1 and the contact signal control circuit, the second connection circuit connects the contact of the gas density relay 1 and the intelligent control unit 7, and in a non-verification state, the second connection circuit is disconnected, and the first connection circuit is closed; under the check-up state, 6 cutting offs of online check-up contact signal sampling unit first connecting circuit, intercommunication second connecting circuit will gas density relay 1's contact with unit 7 is controlled to the intelligence is connected.
In particular, the amount of the solvent to be used,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 contact signal control circuit; the second relay J2 is provided with normally open contacts J21 and J22, and the normally open contacts J21 and J22 are connected at a contact P of the gas density relay 1JThe above step (1); the first relay J1 and the second relay J2 may be integrated into a single unit, i.e., a relay having normally open and normally closed contacts. In a non-verification state, the normally closed contacts J11 and J12 are closed, the normally open contacts J21 and J22 are opened, and the gas density relay monitors the contact P in real timeJThe output state of (1); in the verification state, the normally closed contacts J11 and J12 are opened, the normally open contacts J21 and J22 are closed, and the contact P of the gas density relay 1 is closedJThe intelligent control unit 7 is connected with the normally open contacts J21 and J22.
The intelligent control unit 7 mainly comprises a processor 71(U1) and a power supply 72 (U2). The processor 71(U1) may be a general-purpose computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, an MCU, an FPGA, a PLC, etc., an industrial control motherboard, an embedded main control board, etc., and other intelligent integrated circuits. The power source 72(U2) may be a switching power supply, ac 220V, dc power supply, LDO, programmable power supply, solar, battery, rechargeable battery, or the like. The pressure sensor 2 of the pressure acquisition P may be a pressure sensor, a pressure transmitter, or other pressure-sensitive elements. The temperature sensor 3 for temperature acquisition T may be a temperature sensor, a temperature transmitter, or other various temperature sensing elements. The valve 4 may be a solenoid valve, an electric valve, a pneumatic valve, a ball valve, a needle valve, a regulating valve, a stop valve, etc. which can open and close the gas path and even control the flow. Semi-automatic may also be a manual valve. The pressure regulating mechanism 5 may be an electrically-operated regulating piston, an electrically-operated regulating cylinder, a booster pump, a gas cylinder pressurization, a valve, an electromagnetic valve, a flow controller, or the like. Semi-automatic pressure adjustment mechanisms that can also be adjusted manually.
The working principle of the first embodiment is as follows:
the intelligent control unit 7 is used for controlling the temperature according to the pressure sensor 2 and the temperature sensor 3Monitoring the gas pressure P and temperature T of the electrical equipment to obtain the corresponding 20 ℃ pressure value P20(i.e., gas density value). When it is necessary to verify the gas density relay 1, if the gas density value P is present20Not less than set safety check density value PSAnd the intelligent control unit 7 controls the valve 4 to be closed, so that the gas density relay 1 is isolated from the electrical equipment on a gas path.
Next, the intelligent control unit 7 controls to open the contact signal control circuit of the gas density relay 1, that is, the normally closed contacts J11 and J12 of the first relay J1 of the online verification contact signal sampling unit 6 are opened, so that the safe operation of the electrical equipment is not affected when the gas density relay 1 is verified online, and an alarm signal is not mistakenly sent or the control circuit is locked when the gas density relay is verified. Since the gas density value P is already carried out before the start of the calibration20Not less than set safety check density value PSThe gas of the electrical equipment is in a safe operation range, and the gas leakage is a slow process and is safe during verification. Meanwhile, the normally open contacts J21 and J22 of the second relay J2 of the online verification contact signal sampling unit 6 are closed, and the contact P of the gas density relay 1 is closed at this timeJThe smart control unit 7 is connected through the normally open contacts J21 and J22 of the second relay J2.
Then, the intelligent control unit 7 controls the driving part 52 of the pressure adjusting mechanism 5 (which can be realized by mainly adopting a motor and a gear, the mode is various and flexible), and then the volume of the pressure adjusting mechanism 5 is adjusted to change, so that the pressure of the gas density relay 1 is gradually reduced, so that the gas density relay 1 generates contact signal action, the contact signal action is uploaded to the intelligent control unit 7 through the second relay J2 of the online checking contact signal sampling unit 6, the intelligent control unit 7 converts the pressure value P and the temperature value T measured according to the contact signal action into the pressure value P corresponding to 20 ℃ according to the gas characteristics20(density value), the contact action value P of the gas density relay can be detectedD20. After the action values of the contact signals of the alarm and/or locking signals of the gas density relay 1 are all detected, the intelligent control unit 7 controls the motor of the pressure regulating mechanism 5(motor, or variable frequency motor), the pressure regulating mechanism 5 is regulated to make the pressure of the gas density relay 1 rise gradually, and the return value of the alarm and/or locking contact signal of the gas density relay 1 is tested. The verification is repeated for multiple times (for example, 2 to 3 times), and then the average value of the verification is calculated, so that the verification work of the gas density relay is completed.
After the verification is finished, the normally open contacts J21 and J22 of the second relay J2 of the online verification contact signal sampling unit 6 are disconnected, and the contact P of the gas density relay 1 is disconnected at the momentJThe smart control unit 7 is disconnected by opening the normally open contacts J21 and J22 of the second relay J2. The intelligent control unit 7 controls the valve 4 to be opened, so that the gas density relay 1 is communicated with the electrical equipment on a gas path. Then, the normally closed contacts J11 and J12 of the first relay J1 of the online check contact signal sampling unit 6 are closed, the contact signal control loop of the gas density relay 1 works normally, and the gas density relay monitors the gas density of the electrical equipment safely, so that the electrical equipment works safely and reliably. Therefore, the online checking work of the gas density relay is conveniently completed, and the safe operation of the electrical equipment is not influenced.
After the multifunctional gas density relay completes the checking work, the judgment is carried out, and the detection result can be informed. The mode is flexible, and particularly can be as follows: 1) can be annunciated in situ, such as by indicator lights, digital or liquid crystal displays, and the like; 2) or uploading is implemented through an online remote transmission communication mode, for example, the data can be uploaded to a background monitoring terminal; 3) or uploading the data to a specific terminal through wireless uploading, for example, a mobile phone can be uploaded wirelessly; 4) or uploaded by another route; 5) or the abnormal result is uploaded through an alarm signal line or a special signal line; 6) uploading alone or in combination with other signals. In a word, after the multifunctional gas density relay completes the online verification work, if the multifunctional gas density relay is abnormal, an alarm can be automatically sent out, and the alarm can be uploaded to a remote end or can be sent to a designated receiver, for example, a mobile phone. Or, after the verification work is completed, if the verification work is abnormal, the intelligent control unit 7 can upload the alarm contact signals of the gas density relay 1 to a remote end (a monitoring room, a background monitoring platform and the like) and can display the notice on site. Simple version on-line verification can upload the result of abnormal verification through an alarm signal line. The alarm signal can be uploaded according to a certain rule, for example, when the alarm signal is abnormal, a contact is connected in parallel with an alarm signal contact and is regularly closed and opened, and the condition can be obtained through analysis; or through a separate verification signal line. Specifically, the state can be uploaded well, or the state can be uploaded in a problem manner, or the verification result can be uploaded through a single verification signal line, or the verification result can be uploaded through local display, local alarm or wireless uploading and can be uploaded through the network with the smart phone. The communication mode is wired or wireless, and the wired communication mode CAN be industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carrier and the like; the wireless communication mode can be 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar, a 5G/NB-IOT communication module with a built-in sensor (such as NB-IOT) and the like. In a word, the reliable performance of the multifunctional gas density relay can be fully ensured in multiple modes and various combinations.
The multifunctional gas density relay has a safety protection function, namely when the multifunctional gas density relay is lower than a set value, the multifunctional gas density relay automatically does not perform online verification on the gas density relay 1 any more, and sends out a notification signal. For example, when it is detected that the gas density value is less than the set value PSThen, checking is not performed; only when the gas density value is more than or equal to (alarm pressure value +0.02MPa), the online verification can be carried out.
The multifunctional gas density relay can be subjected to online verification according to set time, and also can be subjected to online verification according to set temperature (such as extreme high temperature, extreme low temperature, normal temperature, 20 ℃ and the like). When the environment temperature of high temperature, low temperature, normal temperature and 20 ℃ is checked on line, the error judgment requirements are different, for example, when the environment temperature of 20 ℃ is checked, the accuracy requirement of the gas density relay can be 1.0 level or 1.6 level, and when the environment temperature is high, the accuracy requirement can be 2.5 level. The method can be implemented according to the relevant standard according to the temperature requirement. For example, according to 4.8 temperature compensation performance regulations in DL/T259 sulfur hexafluoride gas density relay calibration code, the accuracy requirement corresponding to each temperature value is met.
The multifunctional gas density relay can compare error performance at different temperatures and different time periods. That is, the performances of the gas density relay 1 and the electric device are judged by comparing the temperatures in the same temperature range at different times, and the comparison between the history and the present time is made.
The multifunctional gas density relay can be repeatedly verified for multiple times (for example, 2-3 times), and the average value of the multifunctional gas density relay is calculated according to the verification result of each time. When necessary, the gas density relay 1 can be checked online at any time.
When the check-up is accomplished to multi-functional gas density relay, can carry out contrast judgement each other automatically, if the error phase difference is big, will send unusual suggestion: gas density relays or pressure sensors, temperature sensors have problems. The multifunctional gas density relay can complete the mutual checking function of the gas density relay, a pressure sensor, a temperature sensor or a density transmitter, and has the capability of artificial intelligence checking; after the verification work is finished, a verification report can be automatically generated, and if the verification report is abnormal, an alarm can be automatically sent out or sent to a specified receiver, for example, a mobile phone; the gas density value and the verification result are displayed on site or on the background, and the specific mode can be flexible; the system has the functions of real-time online gas density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the like; the gas density value, or the gas density value, the pressure value and the temperature value can be monitored on line; the self-diagnosis function is provided, and abnormal and timely notices such as line breakage, short circuit alarm, sensor damage and the like can be notified; the error performance of the gas density relay can be compared according to different temperatures and different time periods. Namely, the comparison in different periods and in the same temperature range, the performance of the gas density relay is judged. The comparison of each period with history and the comparison of the history and the present are carried out. The normal and abnormal judgment, analysis and comparison can be carried out on the gas density value of the electrical equipment, the gas density relay 1, the pressure sensor 2 and the temperature sensor 3; the system also comprises an analysis system (expert management analysis system) which is used for detecting, analyzing and judging the gas density value monitoring, the gas density relay and the monitoring element to know where the problem points are; the contact signal state of the gas density relay 1 is also monitored and transmitted remotely. The contact signal state of the gas density relay 1 can be known to be open or closed at the background, so that one more layer of monitoring is provided, and the reliability is improved; the temperature compensation performance of the gas density relay 1 can be detected, or detected and judged; the contact resistance of the contact point of the gas density relay 1 can be detected or detected and judged; the system has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on the electrical equipment.
As long as the mutual test data of the pressure sensor 2, the temperature sensor 3 and the gas density relay 1 are consistent and normal, the gas density relay can be indicated to be normal, so that the gas density relay does not need to be checked, other devices do not need to be checked, and the checking can be avoided in the whole service life. Unless the test data of the pressure sensor 2, the temperature sensor 3 and the gas density relay 1 of a certain electrical device in the transformer substation are inconsistent and abnormal, the maintenance personnel are arranged to process the data. And for the anastomotic and normal conditions, the verification is not needed, so that the reliability is greatly improved, the efficiency is greatly improved, and the cost is reduced.
Example four:
as shown in fig. 4, the multifunctional gas density relay, in addition to the housing 101, and the base 102, the end seat 108, the pressure detector 103, the temperature compensation element 104, the signal generators 109, the movement 105, the pointer 106, the dial 107 and the device connection joint 1010 which are arranged in the housing 101, further comprises: the device comprises a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6 and an intelligent control unit 7.
The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint 1010, and the air outlet of the valve 4 is communicated with the base of the gas density relay 1 and the pressure detector. The pressure sensor 2, the temperature sensor 3, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged on or in a shell of the gas density relay 1, and the pressure sensor 2 is communicated with a pressure detector of the gas density relay 1 on a gas path; the pressure regulating mechanism 5 is communicated with a pressure detector of the gas density relay 1; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent unit 7.
Through this pressure adjustment mechanism 5 regulation pressure for the contact action takes place for gas density relay 1's signal generator, the contact action is transmitted to intelligence through online check contact signal sampling unit 6 and is controlled unit 7, intelligence is controlled the gas density value when unit 7 takes place the contact action according to gas density relay 1, perhaps convert into corresponding gas density value according to pressure value and temperature value, detect gas density relay's warning and/or shutting contact signal action value and/or return value, accomplish gas density relay's check-up work. Or the checking work of the gas density relay is finished as long as the alarm and/or the locking contact action value is obtained through detection.
Example five:
as shown in fig. 5, compared with the fourth embodiment, the present embodiment adds a gas make-up interface 10 and a self-sealing valve 11. One end of the self-sealing valve 11 is connected to the electrical equipment in a sealing manner, and the other end of the self-sealing valve 11 is communicated with the air inlet of the valve 4 and the air supplementing interface 10 through a connecting pipe.
Example six:
as shown in fig. 6, the multifunctional gas density relay, in addition to the housing 101, and the base 102, the end seat 108, the pressure detector 103, the temperature compensation element 104, the signal generators 109, the movement 105, the pointer 106, the dial 107 and the device connection joint 1010 which are arranged in the housing 101, further comprises: the device comprises a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6 and an intelligent control unit 7. The gas inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, and the gas outlet of the valve 4 is communicated with the base of the gas density relay 1, the pressure sensor 2 and the pressure adjusting mechanism 5. The pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are arranged on the rear side of the shell of the gas density relay 1. And the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged on the electrical equipment connecting joint. The pressure sensor 2 is communicated with a pressure detector of the gas density relay 1 on a gas path through a base of the gas density relay 1; the pressure adjusting mechanism 5 is communicated with a pressure detector of the gas density relay 1. And the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7. Different from the first embodiment, the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are arranged on the rear side of the housing of the gas density relay 1.
Example seven:
as shown in fig. 7, the multifunctional gas density relay, in addition to the housing 101, and the base 102, the end seat 108, the pressure detector 103, the temperature compensation element 104, the signal generators 109, the movement 105, the pointer 106, the dial 107 and the device connection joint 1010 which are arranged in the housing 101, further comprises: the device comprises a pressure sensor 2, a temperature sensor 3, a valve 4, a pressure adjusting mechanism 5, an online checking contact signal sampling unit 6 and an intelligent control unit 7. The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, the air outlet of the valve 4 is communicated with a connecting pipe, the connecting pipe is communicated with a pressure detector of the gas density relay 1, and the pressure sensor 2 and the pressure adjusting mechanism 5 are also communicated with the connecting pipe, so that the valve 4, the pressure sensor 2, the pressure adjusting mechanism 5 and the pressure detector are communicated on an air path. The gas density relay 1, the pressure sensor 2, the temperature sensor 3, the valve 4, the pressure adjusting mechanism 5, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged in a shell; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2 and the temperature sensor 3 are directly or indirectly connected with the intelligent control unit 7; the valve 4 and the pressure regulating mechanism 5 are respectively connected with an intelligent control unit 7.
Example eight:
as shown in fig. 8, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7. The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, and the air outlet of the valve 4 is communicated with the pressure detector of the gas density relay 1. The gas density relay 1, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2 is communicated with a pressure detector of the gas density relay 1 on a gas path; the pressure regulating mechanism 5 is communicated with a pressure detector of the gas density relay 1 on a gas path. And the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
In contrast to the second embodiment, the pressure adjustment mechanism 5 of the present embodiment is mainly composed of the air bag 53 and the driving member 52. The pressure adjusting mechanism 5 makes the driving part 52 push the air bag 53 to change the volume according to the control of the intelligent control unit 7, thereby completing the pressure rise and fall.
Example nine:
as shown in fig. 9, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7, multi-pass joint 9. The air inlet of the valve 4 is hermetically connected to the equipment connecting joint, and the air outlet of the valve 4 is connected with the multi-way joint 9. The gas density relay 1 is arranged on the multi-way joint 9; the pressure sensor 2 is arranged on the multi-way connector 9, and the pressure sensor 2 is communicated with a pressure detector of the gas density relay 1 on a gas path; the pressure adjusting mechanism 5 is arranged on the multi-way joint 9, and the pressure adjusting mechanism 5 is communicated with a pressure detector of the gas density relay 1; the temperature sensor 3, the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together and arranged on the multi-way joint 9; and the pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
The difference from the second embodiment is that: the pressure adjustment mechanism 5 of the present embodiment is mainly composed of a bellows 54 and a drive member 52. The bellows 54 is connected with the pressure detector of the gas density relay 1 in a sealing way, so as to form a reliable sealed cavity. The pressure adjusting mechanism 5 makes the driving part 52 push the corrugated pipe 54 to change the volume according to the control of the intelligent control unit 7, and then the sealed cavity changes the volume, thereby completing the pressure rise and fall. Through this pressure adjustment mechanism 5 regulated pressure for gas density relay 1 takes place the contact action, and the contact action is transmitted to intelligence through online check-up contact signal sampling unit 6 and is controlled unit 7, and intelligence is controlled unit 7 and is converted into corresponding density value according to pressure value and temperature value when gas density relay 1's contact action, detects gas density relay 1's warning and/or shutting contact action value and/or return value, accomplishes the check-up work to gas density relay 1.
Example ten:
as shown in fig. 10, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7. The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, and the air outlet of the valve 4 is communicated with the pressure detector of the gas density relay 1. The pressure sensor 2 and the temperature sensor 3 are arranged on the gas density relay 1, and the pressure sensor 2 is communicated with a pressure detector of the gas density relay 1 on a gas path. The pressure regulating mechanism 5 is communicated with a pressure detector of the gas density relay 1. The pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
In contrast to the second embodiment, the valve 4 is sealed inside the first housing 41, and the control cable of the valve 4 is led out through the first lead-out wire sealing member 42 sealed with the first housing 41, so that the design ensures that the valve 4 is kept sealed and can work reliably for a long time. The pressure adjusting mechanism 5 is sealed in the second shell 55, and a control cable of the pressure adjusting mechanism 5 is led out through a second outgoing line sealing part 56 sealed with the second shell 55, so that the pressure adjusting mechanism 5 is ensured to keep sealed and can work reliably for a long time. The second casing 55 and the first casing 41 may be integrated into one body.
Example eleven:
as shown in fig. 11, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7. The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, the air outlet of the valve 4 is connected with a pressure adjusting mechanism 5, and the pressure sensor 2 is arranged on the pressure adjusting mechanism 5. Temperature sensor 3, online check-up contact signal sampling unit 6, intelligent control unit 7, gas density relay 1 set up on pressure adjustment mechanism 5. The pressure detector of the gas density relay 1, the pressure sensor 2, the pressure adjusting mechanism 5 and the valve 4 are communicated on a gas path. The temperature sensor 3, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2, the temperature sensor 3, the valve 4 and the pressure adjusting mechanism 5 are respectively connected with an intelligent control unit 7.
Example twelve:
as shown in fig. 12, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: the intelligent control system comprises a first pressure sensor 21, a second pressure sensor 22, a first temperature sensor 31, a second temperature sensor 32, a valve 4, a pressure adjusting mechanism 5, an online verification contact signal sampling unit 6 and an intelligent control unit 7. The air inlet of the valve 4 is hermetically connected to the electrical equipment through an electrical equipment connecting joint, and the air outlet of the valve 4 is communicated with the pressure adjusting mechanism 5. The gas density relay 1, the first temperature sensor 31, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged together and are arranged on the pressure adjusting mechanism 5; the first pressure sensor 21 is provided on the pressure adjustment mechanism 5. The second pressure sensor 22 and the second temperature sensor 32 are provided on the side of the valve 4 to which the electrical connection terminals are connected. The first pressure sensor 21 and the pressure detector of the gas density relay 1 are communicated with the pressure regulating mechanism 5 on a gas path; the first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31 and the second temperature sensor 32 are connected with the intelligent control unit 7; the valve 4 and the pressure regulating mechanism 5 are respectively connected with an intelligent control unit 7.
Different from the second embodiment, there are two pressure sensors, that is, a first pressure sensor 21 and a second pressure sensor 22; the number of the temperature sensors is two, namely a first temperature sensor 31 and a second temperature sensor 32. The second temperature sensor 32 may also be omitted in this embodiment. The pressure sensor comprises a plurality of pressure sensors and temperature sensors, and the pressure values monitored by the pressure sensors can be compared and verified with each other; the temperature values obtained by the plurality of temperature sensors can be compared and verified mutually; the corresponding gas density values obtained by monitoring the pressure sensors and the temperature sensors can be compared and verified with each other.
Example thirteen:
as shown in fig. 13, a multifunctional gas density relay, in addition to a housing 101, and a base 102, an end seat 108, a pressure detector 103, a temperature compensation element 104, a plurality of signal generators 109, a movement 105, a pointer 106, a dial 107 and an equipment connection joint 1010 which are arranged in the housing 101, further comprises: pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online check-up contact signal sampling unit 6, intelligent control unit 7, multi-pass joint 9. The air inlet of the valve 4 is hermetically connected to the electrical equipment, and the air outlet of the valve 4 is connected with the multi-way joint 9. The valve 4 is sealed in the first shell 41, and the control cable of the valve 4 is led out through the first lead-out wire sealing member 42 sealed with the first shell 41, so that the valve 4 is ensured to keep sealing and can work reliably for a long time. The gas density relay 1 is arranged on the multi-way joint 9; the pressure regulating mechanism 5 is mounted on the multi-way joint 9. Pressure sensor 2, temperature sensor 3, online check-up contact signal sampling unit 6 and intelligent control unit 7 set up on gas density relay 1. The pressure sensor 2 and the gas density relay 1 are communicated with a pressure adjusting mechanism 5 on a gas path. The valve 4, the pressure regulating mechanism 5, the pressure sensor 2 and the temperature sensor 3 are respectively connected with the intelligent control unit 7.
The difference from the second embodiment is that: pressure sensor 2, temperature sensor 3, online check-up contact signal sampling unit 6 and intelligent control unit 7 set up on gas density relay 1. The pressure adjusting mechanism 5 of the present embodiment is mainly composed of an air chamber 57, a heating element 58, and a heat insulating member 59. The air chamber 57 is externally (or internally) provided with a heating element 58, and the temperature is changed by heating, so that the pressure is increased or decreased. Through this pressure adjustment mechanism 5 regulated pressure for gas density relay 1 takes place the contact action, and the contact action is transmitted to intelligence through online check-up contact signal sampling unit 6 and is controlled unit 7, and intelligence is controlled unit 7 and is converted into corresponding density value according to pressure value and temperature value when gas density relay 1's contact action, detects gas density relay's warning and/or shutting contact action value and/or return value, accomplishes the check-up work to gas density relay.
The working principle of the embodiment is as follows: when the density relay needs to be checked, the intelligent control unit 7 controls the heating element 58 of the pressure adjusting mechanism 5 to heat, and when the temperature difference between the temperature value T510 in the pressure adjusting mechanism 5 and the temperature value T of the temperature sensor 3 reaches a set value, the intelligent control unit 7 can be used for closing the valve 4, so that the gas density relay is isolated from the electrical equipment on a gas path; and then immediately turning off the heating element 58 of the adjusting mechanism 5, stopping heating the heating element 58, gradually reducing the pressure of the gas in the sealed gas chamber 57 of the pressure adjusting mechanism 5, so that the gas density relay 1 generates alarm and/or locking contact action, respectively, the contact action is transmitted to the intelligent control unit 7 through the online checking contact signal sampling unit 6, and the intelligent control unit 7 detects the alarm and/or locking contact action value and/or return value of the gas density relay according to the density value when the alarm and/or locking contact action is performed, thereby completing the checking work of the gas density relay.
Example fourteen:
as shown in fig. 14, the online verification contact signal sampling unit 6 of the present embodiment includes a photo coupler OC1 and a resistor R1, where the photo coupler OC1 includes a light emitting diode and a photo transistor; the anode of the light emitting diode and the contact point P of the gas density relay 1JAre connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of phototriode is connected as output out6 of online check contact signal sampling unit 6 intelligent control unit 7, the collector of phototriode still passes through resistance R1 is connected with the power.
By the circuit, the contact point P of the gas density relay 1 can be known convenientlyJWhether open (inactive state) or closed (active state). Specifically, when the contact point P isJWhen the light-emitting diode is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level; when the contact point P isJWhen the LED is disconnected, the closed loop is disconnected, the LED does not emit light, the phototriode is cut off, and the collector of the phototriode outputs high level. Thus, the high and low levels are output through the output terminal out6 of the line verification contact signal sampling unit 6.
The intelligent control unit 7 and the contact signal control are realized by the photoelectric isolation method in the embodimentLoop isolation, closing contact P during verificationJOr contact P in the event of gas leakageJA shutdown also occurs, at which time a low level of the collector output of the phototransistor is detected. Controlling the closing of the contact P during the verification processJIs within a predetermined length so that the contact point P is checked without leakageJThe length of the duration time of the closed state is determined, and whether the contact P occurs in the verification process can be judged by monitoring the duration time of the received low levelJAnd closing. Therefore, the alarm signal generated by the gas density relay 1 during verification can be judged by recording the time during verification, and is not the alarm signal generated during gas leakage.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1) and a power supply 72 (U2).
Example fifteen:
as shown in fig. 15, the online verification contact signal sampling unit 6 of the present embodiment includes a first photo coupler OC1 and a second photo coupler OC 2.
The light emitting diode of the first photoelectric coupler OC1 and the light emitting diode of the second photoelectric coupler OC2 are respectively connected in parallel through a current limiting resistor, and after being connected in parallel, the light emitting diodes are connected in series with the contact of the gas density relay to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler OC1 and the second photoelectric coupler OC2 are opposite; the collector of the phototriode of the first photoelectric coupler OC1 and the collector of the phototriode of the second photoelectric coupler OC2 are both connected with the power supply through a divider resistor, the emitter of the phototriode of the first photoelectric coupler OC1 is connected with the emitter of the phototriode of the second photoelectric coupler OC2 to form an output end out6, and the output end out6 is connected with the intelligent control unit 7 and is grounded through a resistor R5.
By the circuit, the contact point P of the gas density relay 1 can be known convenientlyJWhether open (inactive state) or closed (active state). Specifically, when the contact point P isJWhen the circuit is closed, the closed loop is electrified, the first photoelectric coupler OC1 is conducted, and the second photoelectric coupler is connectedThe OC2 is cut off, and the emitter (i.e., the output end out6) of the phototriode of the first opto-coupler OC1 outputs a high level; or, the first photo coupler OC1 is turned off, the second photo coupler OC2 is turned on, and the emitter (i.e., the output end out6) of the photo transistor of the second photo coupler OC2 outputs a high level. When the contact point P isJWhen the circuit is opened, the closed loop is powered off, the first photoelectric coupler OC1 and the second photoelectric coupler OC2 are both cut off, and the emitters (i.e., the output end out6) of the phototransistors of the first photoelectric coupler OC1 and the second photoelectric coupler OC2 output low level.
In a preferred embodiment, the circuit further comprises a first voltage stabilizing diode group and a second voltage stabilizing diode group, the first voltage stabilizing diode group and the second voltage stabilizing diode group are connected in parallel on the contact signal control loop, and the connection directions of the first voltage stabilizing diode group and the second voltage stabilizing diode group are opposite; the first voltage stabilizing diode group and the second voltage stabilizing diode group are respectively formed by connecting one, two or more than two voltage stabilizing diodes in series.
In this embodiment, the first zener diode group includes a first zener diode D1 and a second zener diode D2 connected in series, and a cathode of the first zener diode D1 is connected to an anode of the second zener diode D2; the second zener diode group comprises a third zener diode D3 and a fourth zener diode D4 which are connected in series, and the anode of the third zener diode D3 is connected with the cathode of the fourth zener diode D4.
The circuit can conveniently realize the contact P of the gas density relay 1JMonitoring the state of the contact point P by combining with an intelligent control unit 7JWhether the power grid is in an open state or a closed state is correspondingly processed, remote transmission is implemented, the signal state of the contact is known from a background, and the reliability of the power grid is greatly improved.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1) and a power supply 72 (U2).
Example sixteen:
as shown in fig. 16, the present embodiment is different from embodiment fifteen in that: the intelligent control unit 7 mainly comprises a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), a data storage 76(U6), and the like.
The communication mode of the communication module 73(U3) may be wired, such as RS232, RS485, CAN-BUS, etc., industrial BUS, fiber ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier, etc.; or wireless, such as 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication, sonar, etc. The intelligent control unit protection circuit 74(U4) may be an anti-electrostatic interference circuit (e.g., ESD, EMI), an anti-surge circuit, an electric fast protection circuit, an anti-rf field interference circuit, an anti-pulse group interference circuit, a power supply short-circuit protection circuit, a power supply reverse protection circuit, an electrical contact mis-connection protection circuit, a charging protection circuit, etc. The intelligent control unit protection circuits can be one or formed by flexibly combining a plurality of types. The display and output 75(U5) may be a digital tube, LED, LCD, HMI, display, matrix screen, printer, fax, projector, mobile phone, etc., and may be one or a combination of several. The data storage 76(U6) may be FLASH memory cards such as FLASH, RAM, ROM, hard disk, SD, etc., magnetic tapes, punched tapes, compact discs, U disks, discs, films, etc., and may be one type or a combination of several types.
Example seventeen:
as shown in fig. 17, the online verification contact signal sampling unit 6 of the present embodiment includes a first hall current sensor H1 and a second hall current sensor H2, the first hall current sensor H1, the second hall current sensor H2, and a contact P of the gas density relayJAre connected in series to form a closed loop, and the contact point P of the gas density relay 1JConnected between the first hall current sensor H1 and the second hall current sensor H2; the output end of the first hall current sensor H1 and the output end of the second hall current sensor H2 are both connected with the intelligent control unit 7.
By the circuit, the contact point P of the gas density relay 1 can be known convenientlyJWhether open (inactive state) or closed (active state). Specifically, when the contact point P isJWhen the Hall sensor is closed, a closed loop is electrified, and current flows between the first Hall current sensor H1 and the second Hall current sensor H2 to generate induced potential; when the contact point P isJWhen the Hall sensor is opened, the closed loop is powered off, no current flows between the first Hall current sensor H1 and the second Hall current sensor H2, and the induced potential is zero.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), and a data storage 76 (U6).
Example eighteen:
as shown in fig. 18, the online verification contact signal sampling unit 6 of the present embodiment includes a first SCR1, a second SCR2, a third SCR3, and a fourth SCR 4.
The first silicon controlled rectifier SCR1 is connected with the third silicon controlled rectifier SCR3 in series, and the second silicon controlled rectifier SCR2 is connected with the fourth silicon controlled rectifier SCR4 in series and then forms a series-parallel closed loop with a series circuit formed by the first silicon controlled rectifier SCR1 and the third silicon controlled rectifier SCR 3; contact point P of the gas density relay 1JIs electrically connected with the circuit between the first SCR1 and the third SCR3 through a circuit, and the other end of the first SCR is electrically connected with the circuit between the first SCR1 and the third SCR3 through a circuit
The lines between the second silicon controlled SCR2 and the fourth silicon controlled SCR4 are electrically connected. The series-parallel connection here is a circuit in which the above-described components are connected in parallel and in series, as shown in fig. 6.
Specifically, the cathode of the first thyristor SCR1 and the cathode of the second thyristor SCR2 are connected to form the output end of the online check contact signal sampling unit 6, which is connected to the intelligent control unit 7; the anode of the first SCR1 is connected with the cathode of the third SCR 3; the anode of the second SCR2 is connected with the cathode of the fourth SCR 4; the anode of the third SCR3 and the anode of the fourth SCR4 are connected to the input terminal of the online check contact signal sampling unit 6. The control electrodes of the first silicon controlled rectifier SCR1, the second silicon controlled rectifier SCR2, the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are all connected with the intelligent control unit 7. The intelligent control unit 7 can control on or off of the corresponding controllable silicon.
The working process of the embodiment is as follows:
when not verified and operating normally, the contact PJAnd the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are triggered when the circuit is disconnected, the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are in a conducting state, and the contact signal control loop is in a working state. At the moment, the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 are not triggered, and the cathodes of the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 have no voltage output and are in a non-conducting state. When the verification is performed, the third SCR3 and the fourth SCR4 are not triggered, and the first SCR1 and the second SCR2 are triggered. At this time, the third SCR3 and the fourth SCR4 are in an OFF state, and the contact PJIs isolated from the contact signal control circuit. The first SCR1 and the second SCR2 are in conduction state, and the contact PJAnd the online checking contact signal sampling unit 6 is communicated with the intelligent control unit 7. The online check contact signal sampling unit 6 can also be formed by mixing a solid-state relay or an electromagnetic relay and a silicon controlled rectifier flexibly.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), and a data storage 76 (U6).
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (35)
1. A multi-functional gas density relay, comprising: the multifunctional gas density relay comprises a shell, a base, a pressure detector, a temperature compensation element, at least one signal generator, an equipment connecting joint and an online check joint signal sampling unit, wherein the base, the pressure detector, the temperature compensation element, the at least one signal generator and the equipment connecting joint are arranged in the shell, the equipment connecting joint is used for connecting electrical equipment, and the online check joint signal sampling unit is connected with the signal generator and is used for sampling joint signals generated when the multifunctional gas density relay generates joint actions;
the online check contact signal sampling unit comprises a first connecting circuit and a second connecting circuit; the first connecting circuit is connected with a contact of the multifunctional gas density relay and a contact signal control circuit, and the second connecting circuit is connected with the contact of the multifunctional gas density relay and the output end of the on-line checking contact signal sampling unit;
in a non-checking state, the contact is a normally open density relay, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the first connecting circuit is disconnected, the second connecting circuit is communicated, and the contact of the gas density relay is connected with the output end of the online checking contact signal sampling unit; or,
in a non-checking state, the contact is a normally closed density relay, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the contact signal control loop is closed, the connection between the contact of the gas density relay and the contact signal control loop is disconnected, the second connecting circuit is communicated, and the contact of the gas density relay is connected with the output end of the online checking contact signal sampling unit;
wherein the contact signal comprises an alarm, and/or a latch.
2. A multi-functional gas density relay according to claim 1, wherein: the signal generator comprises a microswitch or a magnetic auxiliary electric contact, and the multifunctional gas density relay outputs the contact signal through the signal generator; the temperature compensation element adopts a temperature compensation sheet or gas sealed in the shell; the pressure detector comprises a bourdon tube or a bellows.
3. A multi-functional gas density relay according to claim 1, wherein: the pressure detector is fixed on the base and communicated with the base.
4. A multi-functional gas density relay according to claim 1, wherein: the online check joint signal sampling unit is arranged on the equipment connecting joint, or on the shell, or in the shell.
5. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay also comprises a display mechanism, wherein the display mechanism comprises a movement, a pointer and a dial, and the movement is fixed in the shell; one end of the temperature compensation element is also connected with the movement through a connecting rod or directly connected with the movement; the pointer is arranged on the movement and in front of the dial, and the pointer is combined with the dial to display the gas density value; and/or
The display mechanism comprises a digital device or a liquid crystal device with a display value display.
6. A multi-functional gas density relay according to claim 1, wherein: the first connecting circuit comprises a first relay, the second connecting circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact are kept in opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay;
in a non-checking state, the normally closed contact is closed, the normally open contact is opened, and the gas density relay monitors the output state of the contact in real time; under the check-up state, normally closed contact disconnection, normally open contact is closed, the contact of gas density relay passes through normally open contact with online check-up contact signal sampling unit's output is connected.
7. The multi-functional gas density relay of claim 6, wherein: the first relay and the second relay are two independent relays or the same relay.
8. A multi-functional gas density relay according to claim 1, wherein: the second connecting circuit comprises a photoelectric coupler and a resistor, wherein the photoelectric coupler comprises a light emitting diode and a photosensitive triode; the light emitting diode and the contact of the gas density relay are connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of the phototriode is connected with the output end of the on-line checking contact signal sampling unit, and the collector of the phototriode is also connected with a power supply through the resistor;
when the contact is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level;
when the contact is opened, the closed loop is opened, the light emitting diode does not emit light, the phototriode is cut off, and the collector of the phototriode outputs high level.
9. A multi-functional gas density relay according to claim 1, wherein: the second connecting circuit comprises a first photoelectric coupler and a second photoelectric coupler;
the light emitting diode of the first photoelectric coupler and the light emitting diode of the second photoelectric coupler are respectively connected in parallel through a current limiting resistor, and are connected in series with the contact of the gas density relay after being connected in parallel to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler and the second photoelectric coupler are opposite;
the collector of the phototriode of the first photoelectric coupler and the collector of the phototriode of the second photoelectric coupler are connected with a power supply through a divider resistor, and the emitter of the phototriode of the first photoelectric coupler and the emitter of the phototriode of the second photoelectric coupler are connected to form the output end of the on-line checking contact signal sampling unit and are grounded through a resistor;
when the contact is closed, a closed loop is electrified, the first photoelectric coupler is conducted, the second photoelectric coupler is cut off, and the emitter of the phototriode of the first photoelectric coupler outputs high level; or the first photoelectric coupler is cut off, the second photoelectric coupler is conducted, and an emitter of a phototriode of the second photoelectric coupler outputs a high level;
when the contact is disconnected, the closed loop is powered off, the first photoelectric coupler and the second photoelectric coupler are both cut off, and the emitters of the phototriodes of the first photoelectric coupler and the second photoelectric coupler output low levels.
10. A multi-functional gas density relay according to claim 9, wherein: the second connecting circuit further comprises a first voltage stabilizing diode group and a second voltage stabilizing diode group, the first voltage stabilizing diode group and the second voltage stabilizing diode group are connected in parallel on the contact signal control loop, and the connection directions of the first voltage stabilizing diode group and the second voltage stabilizing diode group are opposite; the first voltage stabilizing diode group and the second voltage stabilizing diode group are respectively formed by connecting one, two or more than two voltage stabilizing diodes in series.
11. A multi-functional gas density relay according to claim 10, wherein: the first voltage stabilizing diode group comprises a first voltage stabilizing diode and a second voltage stabilizing diode which are connected in series, and the cathode of the first voltage stabilizing diode is connected with the anode of the second voltage stabilizing diode; the second voltage stabilizing diode group comprises a third voltage stabilizing diode and a fourth voltage stabilizing diode which are connected in series, and the anode of the third voltage stabilizing diode is connected with the cathode of the fourth voltage stabilizing diode.
12. A multi-functional gas density relay according to claim 1, wherein: the second connecting circuit further comprises a first Hall current sensor and a second Hall current sensor, the first Hall current sensor, the second Hall current sensor and the contact of the gas density relay are connected in series to form a closed loop, and the contact of the gas density relay is connected between the first Hall current sensor and the second Hall current sensor; the output end of the first Hall current sensor and the output end of the second Hall current sensor are both connected with the output end of the on-line checking contact signal sampling unit;
when the contact is closed, a closed loop is electrified, and current flows between the first Hall current sensor and the second Hall current sensor to generate induced potential;
when the contact is opened, the closed loop is powered off, no current flows between the first Hall current sensor and the second Hall current sensor, and the generated induced potential is zero.
13. A multi-functional gas density relay according to claim 1, wherein: the second connection circuit includes: the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier;
first silicon controlled rectifier, third silicon controlled rectifier establish ties, and the series connection circuit that second silicon controlled rectifier, fourth silicon controlled rectifier establish ties the back and first silicon controlled rectifier, third silicon controlled rectifier constitute forms the series-parallel closed circuit, the one end of gas density relay's contact pass through the circuit with circuit electricity between first silicon controlled rectifier, the third silicon controlled rectifier is connected, the other end pass through the circuit with circuit electricity between second silicon controlled rectifier, the fourth silicon controlled rectifier is connected.
14. A multi-functional gas density relay according to claim 13, wherein: the cathode of the first controllable silicon is connected with the output end of the on-line checking contact signal sampling unit, and the anode of the first controllable silicon is connected with the cathode of the third controllable silicon; the control electrodes of the first silicon controlled rectifier and the third silicon controlled rectifier are connected with the output end of the online check contact signal sampling unit; the cathode of the second controllable silicon is connected with the output end of the on-line checking contact signal sampling unit, and the anode of the second controllable silicon is connected with the cathode of the fourth controllable silicon; and control electrodes of the second controllable silicon and the fourth controllable silicon are connected with the output end of the online check contact signal sampling unit.
15. A multi-functional gas density relay according to claim 1, wherein: the online checking contact signal sampling unit is provided with at least two independent sampling contacts, can automatically check at least two contacts of the gas density relay at the same time, and continuously measures without replacing or reselecting the contacts; wherein,
the contacts include, but are not limited to, one of an alarm contact, an alarm contact + latching 1 contact + latching 2 contact, an alarm contact + latching contact + overpressure contact.
16. A multi-functional gas density relay according to claim 1, wherein: the online checking contact signal sampling unit is used for testing the contact action value or the switching value of the multifunctional gas density relay, wherein the voltage is not lower than 24V, namely, the voltage is not lower than 24V applied between corresponding terminals of the contact during checking.
17. A multi-functional gas density relay according to claim 1, wherein: the online check joint signal sampling unit also comprises an anti-interference component.
18. A multi-functional gas density relay according to claim 1, wherein: the online check contact signal sampling unit is also provided with a temperature protection device for components and parts, and is used for ensuring the components and parts to reliably work at low or high ambient temperature;
the temperature protection device comprises a heater and/or a radiator, wherein the heater is started when the temperature is lower than a set value, and the radiator is started when the temperature is higher than the set value.
19. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay directly comprises a pressure sensor and a temperature sensor or comprises a density measuring sensor adopting a quartz tuning fork technology; or a gas density transmitter consisting of a pressure sensor and a temperature sensor.
20. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay also comprises at least one pressure sensor, and the pressure sensor is communicated with the multifunctional gas density relay on a gas path and is used for collecting a pressure value; and/or the presence of a gas in the gas,
the multifunctional gas density relay further comprises at least one temperature sensor, and the temperature sensor is connected with the multifunctional gas density relay and used for collecting temperature values.
21. A multi-functional gas density relay according to claim 20, wherein: the temperature sensor is arranged on the shell of the multifunctional gas density relay or in the shell or outside the shell.
22. A multi-functional gas density relay according to claim 20, wherein: at least one temperature sensor is arranged near or on or integrated in the temperature compensation element of the multifunctional gas density relay. Preferably, at least one temperature sensor is arranged at one end of the pressure detector of the gas density relay close to the temperature compensation element.
23. A multi-functional gas density relay according to claim 20, wherein: the pressure sensor and the temperature sensor are of an integrated structure; or the pressure sensor and the temperature sensor form an integrated structure with a remote transmission function, and the pressure value, the temperature value and/or the gas density value are/is monitored in a remote transmission mode, and/or the contact signal state of the multifunctional gas density relay is/are transmitted in a remote transmission mode.
24. A multi-functional gas density relay according to claim 20, wherein: the multifunctional gas density relay comprises at least two pressure sensors, pressure values collected by the pressure sensors are compared, and mutual verification among the pressure sensors is completed.
25. A multi-functional gas density relay according to claim 20, wherein: the multifunctional gas density relay comprises at least two temperature sensors, and the temperature values acquired by the temperature sensors are compared to finish mutual verification among the temperature sensors.
26. A multi-functional gas density relay according to claim 20, wherein: the multifunctional gas density relay comprises at least one pressure sensor and at least one temperature sensor; randomly arranging and combining the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors, converting the combinations into a plurality of corresponding pressure values at 20 ℃ according to gas pressure-temperature characteristics, namely gas density values, and comparing the gas density values to finish the mutual verification of the pressure sensors and the temperature sensors; or the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors are subjected to all permutation and combination, and each combination is converted into a plurality of corresponding pressure values at 20 ℃ according to the gas pressure-temperature characteristic, namely gas density values, and each gas density value is compared to complete the mutual verification of each pressure sensor and each temperature sensor; or comparing a plurality of gas density values obtained by each pressure sensor and each temperature sensor with comparison density value output signals output by the gas density relay to complete mutual verification of the gas density relay, each pressure sensor and each temperature sensor; or comparing the gas density values, the pressure values and the temperature values obtained by the pressure sensors and the temperature sensors to finish the mutual verification of the gas density relay, the pressure sensors and the temperature sensors.
27. A multi-functional gas density relay according to claim 20, wherein: the multi-functional gas density relay still includes the intelligence and controls the unit, the intelligence control the unit with online check-up contact signal sampling unit pressure sensor, and/or temperature sensor is connected for acquire when the multi-functional gas density relay takes place the contact action pressure value and the temperature value that pressure sensor, temperature sensor gathered to according to the gas pressure-temperature characteristic conversion become and correspond 20 ℃ of pressure value, gaseous density value promptly, accomplish the online check-up of multi-functional gas density relay.
28. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay also comprises a pressure adjusting mechanism, a gas path of the pressure adjusting mechanism is communicated with the pressure detector of the gas density relay, and the pressure adjusting mechanism is configured to adjust the pressure of the gas path of the gas density relay to enable the multifunctional gas density relay to generate contact action.
29. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay further comprises a valve, one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with a gas path of the multifunctional gas density relay.
30. A multi-functional gas density relay according to claim 29, wherein: the valve, the base and the pressure detector are connected together through a connecting pipe.
31. A multi-functional gas density relay according to claim 29, wherein: the multifunctional gas density relay also comprises a multi-way joint, and a base and a pressure detector of the multifunctional gas density relay are arranged on the multi-way joint; or the equipment connecting joint and the valve of the multifunctional gas density relay are arranged on the multi-way joint; or the equipment connecting joint, the base and the valve of the multifunctional gas density relay are arranged on the multi-way joint.
32. A multi-functional gas density relay according to claim 31, wherein: the multifunctional gas density relay further comprises a self-sealing valve, and the self-sealing valve is installed on the multi-way connector.
33. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay also comprises a micro-water sensor for monitoring the micro-water value of the gas on line; and/or the multifunctional gas density relay further comprises a decomposed substance sensor for monitoring the decomposed substances of the gas on line.
34. A multi-functional gas density relay according to claim 1, wherein: the multifunctional gas density relay further comprises a communication module, and the multifunctional gas density relay realizes data remote transmission through the communication module.
35. A multi-functional gas density relay according to claim 34, wherein: the communication mode of the communication module is a wired communication mode or a wireless communication mode;
the wired communication mode comprises one or more of RS232 BUS, RS485 BUS, CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier and cable Wire;
the wireless communication mode comprises one or more of a 5G/NB-IOT communication module arranged in the sensor, a 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic waves, sound waves, satellites, light waves, quantum communication and sonar.
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