CN111952105B - Full-range high-precision remote transmission type sulfur hexafluoride gas density relay - Google Patents
Full-range high-precision remote transmission type sulfur hexafluoride gas density relay Download PDFInfo
- Publication number
- CN111952105B CN111952105B CN202010647147.5A CN202010647147A CN111952105B CN 111952105 B CN111952105 B CN 111952105B CN 202010647147 A CN202010647147 A CN 202010647147A CN 111952105 B CN111952105 B CN 111952105B
- Authority
- CN
- China
- Prior art keywords
- density relay
- piece
- trigger
- gas density
- micro switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 47
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 title claims abstract description 18
- 230000033001 locomotion Effects 0.000 claims description 22
- 230000000670 limiting effect Effects 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000013178 mathematical model Methods 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
- H01H33/563—Gas reservoirs comprising means for monitoring the density of the insulating gas
-
- 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
Abstract
The invention discloses a full-range high-precision remote transmission type sulfur hexafluoride gas density relay, which comprises a bourdon tube, a mechanical part and an electronic part, wherein the bourdon tube is used for communicating a sulfur hexafluoride gas chamber; one or more signal generators for providing output alarm and/or locking contact signals are arranged at the movable end of the bourdon tube, each signal generator is internally provided with a large-stroke micro switch, and each large-stroke micro switch comprises a signal pin, an elastic trigger sheet for communicating loops among the signal pins, a trigger rod reciprocating along a guide piece and a spring for connecting the trigger rod and the movable end of the elastic trigger sheet; the trigger rod is pushed by the movable end of the bourdon tube and drives the elastic trigger piece to be communicated with a loop where the elastic trigger piece is located through a spring; the stroke of the trigger rod is larger than the stroke of the connecting point of the elastic trigger sheet and the spring. The invention can realize the full-range display of the gas density and can improve the precision.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a high-precision remote transmission gas density relay applied to high-voltage or medium-voltage electrical equipment, and particularly relates to a full-range high-precision remote transmission gas density relay.
Background
At present, sulfur hexafluoride electrical products are widely applied to the power sector and industrial and mining enterprises, and rapid development of the power industry is promoted. In the electrical equipment in the power industry, sulfur hexafluoride gas medium for arc extinction and insulation can not be separated during operation and normal work of high-voltage electrical equipment, so that in sulfur hexafluoride electrical products provided with sealed sulfur hexafluoride gas chambers, it is an important basic requirement to ensure that the gas chambers are not leaked, if gas leaks, the reduction of gas density seriously affects the electrical performance of the equipment, and serious hidden danger is formed on the safe operation of the equipment. Whether the sulfur hexafluoride gas in the gas chamber leaks gas or not is monitored, and whether the density value changes or not is an important daily work. Currently, a mechanical pointer type sulfur hexafluoride gas density relay is generally adopted to monitor the sulfur hexafluoride gas density. The gas path of the gas density relay is communicated with the sulfur hexafluoride gas chamber, and is converted into displacement at the movable end of the sulfur hexafluoride gas chamber through Bourdon tubes (Bourdon tubes) according to the air pressure change of the sulfur hexafluoride gas chamber, and the movement of the movable end of the Bourdon tube is moved to drive the pointer to move, so that the indicating indication is provided.
Meanwhile, as the unattended transformer substation develops towards networking and digitalization, SF is treated6Online monitoring of gas density conditions of electrical equipment has found many applications. The existing gas density monitoring system (gas density relay) widely adopts the application of remote transmission SF6The gas density relay realizes the collection of density, pressure and temperature and the uploading of data, and realizes the on-line monitoring of gas density. Therefore, it is very important to select a reliable remote transmission density relay. However, the remote SF currently used6The micro switch adopted by the gas density relay has inherent defects in structure, so that the full-range pressure measurement display (minus 0.1-0.9 MPa) cannot be realized, the precision is not high, and the requirements of the current full-range pressure measurement and precision improvement are difficult to meet; therefore, a full-range high-precision remote transmission type sulfur hexafluoride gas density relay is developed so as to better serve the construction work of a power grid.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a full-range high-precision remote transmission gas density relay and system for high-voltage electrical equipment. The invention is used for accurately monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment in a full-range manner, improving the working efficiency, reducing the operation and maintenance cost and ensuring the safe operation of a power grid.
The invention is realized by the following steps: various embodiments of the present invention provide a full-range high-precision remote transmission sulfur hexafluoride gas density relay, including:
the device comprises a shell, a base, a machine core, an end cap, a bourdon tube, a temperature compensation sheet, a large-stroke micro switch, the machine core, a plurality of signal generators, an adjusting rod, a pressure sensor, a temperature sensor, an amplifying circuit, an A/D converter, an MCU, a data communication interface and a power supply;
the fixed end of each of the two ends of the baton tube is welded on the base, the movable end of each of the two ends of the baton tube is connected with one end of a temperature compensation sheet through the end cap, the other end of the temperature compensation sheet is connected with an adjusting rod, an adjusting screw is arranged at the right end of the adjusting rod, and the left end of the adjusting rod is connected with the machine core;
the long-stroke micro switch is arranged below the adjusting rod and opposite to the adjusting screw.
Under the triggering action of the adjusting screw, the large-stroke microswitch sends out a corresponding signal to complete the function of outputting an alarm and/or locking a contact signal by the gas density relay.
On the gas path, the pressure sensor is communicated with the Badon tube, and the temperature sensor is arranged in the shell;
the power supply respectively supplies power to the pressure sensor, the temperature sensor, the amplifying circuit, the A/D converter, the MCU and the data communication interface; the pressure sensor and the temperature sensor process the collected pressure signal and temperature signal through the amplifying circuit, and then upload the signals to the MCU through A/D conversion, and the MCU transmits the signals to the MCU according to SF6The mathematical model of the relationship between the gas pressure and the temperature adopts a soft measurement method to obtain SF through operation processing6Density value P of gas20，Then the density value P can be remotely transmitted through a data communication interface20And the pressure value and the temperature value are used for realizing the online monitoring of the gas density value of the electrical equipment. Characterized in that the large-stroke microswitch comprisesThe device comprises a shell, an elastic trigger piece, an upper contact, a lower contact, a signal pin, a spring, a guide piece, a trigger rod, a cover cap and a contact piece; the elastic trigger piece arranged in the shell has certain elasticity, one end of the elastic trigger piece is fixed and is communicated with the signal pin, the other end of the elastic trigger piece is provided with an upper contact, and a lower contact corresponding to the upper contact is arranged on the other signal pin; the upper contact and the lower contact are made of silver or made of good conductors with gold-plated surfaces. The spring is arranged between the elastic trigger piece and the trigger rod, and transmits the trigger acting force received by the trigger rod arranged in the guide piece to the elastic trigger piece so as to drive the upper contact to be communicated with the lower contact and generate a signal; the spring has a large telescopic stroke, so that the stroke of the micro switch can be increased, and the full-range performance of the density relay is realized. The contact piece is fixedly connected with one end of the trigger rod, serves as a signal trigger force receiving part of the large-stroke micro switch, and receives and conducts the signal trigger acting force of the adjusting screw of the density relay. The elastic triggering sheet consists of a fixed end, an elastic sheet and a spring connecting section; the elastic property of the large-stroke micro switch can store energy in advance, the acceleration of the large-stroke micro switch when the large-stroke micro switch is switched on or switched off is increased, and the large-stroke micro switch has the performance of quick switching on and switching off. The trigger rod consists of a guide end and a guide rod end; the guide end of the high-precision density relay is tightly matched with the guide piece of the large-stroke micro switch and slides relatively freely, the motion track of the high-precision density relay is limited, and the high-precision density relay meets the high-precision requirement. The inner wall of the guide piece is smooth and wear-resistant and is arranged on the shell of the large-stroke micro switch; the contact piece consists of a contact bottom surface and a limiting piece; spacing piece is right density relay's regulation pole has certain direction limiting displacement, ensure adjust the pole with its orbit is stable in triggering the action in the contact bottom surface, and is reliable, prevents because of sideslipping relatively that the production triggers badly, and then influences density relay's precision performance.
The large-stroke micro switches are arranged into any number of switch groups of 1 group, 2 groups, 3 groups or 4 groups according to different requirements, and each group of switches jointly or independently sends out signals.
The power supply is located remotely from the temperature sensor and the temperature compensation plate.
Still include equipment attach fitting, equipment attach fitting sets up the downside or the rear side at the casing.
The gas density relay also comprises a pointer and a dial, wherein the dial is fixed on the movement, the pointer is fixed on the movement and is arranged in front of the dial, and the pointer has a value display.
The pressure sensor measures a density relay of the relative pressure or absolute pressure type.
The gas density relay also has a man-machine interaction functional module: the data display interface is included, and the current data value can be refreshed in real time; and a data input area for inputting parameter setting values;
the baton pipe and the pressure sensor are connected together through a connecting pipe, and the air paths are communicated.
The gas density relay is also equipped with a timer.
The contact bottom surface and the limiting piece of the contact piece are circular and bowl-shaped. The adjusting screw is arranged in the center of the bowl, the adjusting screw moves in the bowl, and due to the limiting effect of the limiting piece, the anti-vibration performance can be greatly improved, the adjusting screw is prevented from jumping out of the contact piece, and the problem that the relay fails is solved.
The shell of the gas density relay is also filled with transformer oil, and the transformer oil can improve the insulating property of the gas density relay, prevent the erosion of dust or moisture and greatly prolong the service life of the large-stroke micro switch.
A full-range high-precision remote transmission type sulfur hexafluoride gas density relay comprises a shell, a base, a machine core, an end cap, a Bardon tube, a temperature compensation sheet, a large-stroke micro switch, the machine core, a plurality of signal generators, an adjusting rod, a pressure sensor, a temperature sensor, an amplifying circuit, an A/D converter, an MCU, a data communication interface and a power supply; one end of the Bardon tube is welded on the base, the other end of the Bardon tube is connected with one end of the temperature compensation sheet through the end cap, the other end of the temperature compensation sheet is connected with the adjusting rod, the right end of the adjusting rod is provided with an adjusting screw, and the left end of the adjusting rod is connected with the machine core; the large-stroke micro switch is arrangedAnd the lower part of the adjusting rod is arranged opposite to the adjusting screw. Under the triggering action force of the adjusting screw, the large-stroke microswitch enables the large-stroke microswitch to send out a corresponding signal, and the function of outputting an alarm and/or locking a contact signal by the density relay is completed. On the gas path, the pressure sensor is communicated with the Badon tube, and the temperature sensor is arranged in the shell; the power supply respectively supplies power to the pressure sensor, the temperature sensor, the amplifying circuit, the A/D converter, the MCU and the data communication interface; the pressure sensor and the temperature sensor process the collected pressure signal and temperature signal through the amplifying circuit, and then upload the signals to the MCU through A/D conversion, and the MCU transmits the signals to the MCU according to SF6The mathematical model of the relationship between the gas pressure and the temperature adopts a soft measurement method to obtain SF through operation processing6Density value P of gas20，Then the density value P can be remotely transmitted through a data communication interface20And the pressure value and the temperature value are used for realizing the online monitoring of the gas density value of the electrical equipment. The large-stroke microswitch comprises a shell, an elastic trigger piece, an upper contact, a lower contact, a signal pin, a spring, a guide piece, a trigger rod, a cover cap and a contact piece; the elastic trigger piece arranged in the shell has certain elasticity, one end of the elastic trigger piece is fixed and is communicated with the signal pin, the other end of the elastic trigger piece is provided with an upper contact, and a lower contact corresponding to the upper contact is arranged on the other signal pin; the upper contact and the lower contact are made of silver or made of good conductors with gold plated on the surfaces. The spring is arranged between the elastic trigger piece and the trigger rod, and transmits the trigger acting force received by the trigger rod arranged in the guide piece to the elastic trigger piece so as to drive the upper contact to be communicated with the lower contact and generate a signal; the spring has a large telescopic stroke, so that the stroke of the micro switch can be increased, and the full-range performance of the density relay is realized. The contact piece is fixedly connected with one end of the trigger rod and serves as a signal trigger force receiving part of the large-stroke micro switch to receive and conduct a signal trigger acting force of an adjusting screw of the density relay. The elastic triggering sheet consists of a fixed end, an elastic sheet and a spring connecting section; the elastic property of the large-stroke micro switch can be pre-stored, the acceleration of the large-stroke micro switch during the connection or disconnection is increased, and the large-stroke micro switch hasFast on-off performance. The trigger rod consists of a guide end and a guide rod end; the guide end of the high-precision density relay is tightly matched with the guide piece of the large-stroke micro switch and slides relatively freely, the motion track of the high-precision density relay is limited, and the high-precision density relay meets the high-precision requirement. The inner wall of the guide piece is smooth and wear-resistant and is arranged on the shell of the large-stroke micro switch; the contact piece consists of a contact bottom surface and a limiting piece; the limiting sheet has a certain guiding and limiting effect on the adjusting rod of the density relay, so that the adjusting rod and the contact bottom surface are stable and reliable in running track in the triggering action, and the poor triggering caused by relative sideslip is prevented, and the precision performance of the density relay is further influenced.
Preferably, the large-stroke micro-switches are arranged into any number of switch groups of 1 group, 2 groups, 3 groups or 4 groups according to different requirements, and each group of switches jointly or individually sends out signals.
Preferably, the power supply is located remotely from the temperature sensor and the temperature compensation plate.
Preferably, it further comprises a device connection fitting provided at the lower side or the rear side of the housing.
Preferably, the density relay further comprises a pointer and a dial, wherein the dial is fixed on the movement, and the pointer is fixed on the movement and provided with a value display.
Preferably, the pressure sensor measures a density relay of the relative pressure or absolute pressure type.
Preferably, the gas density relay further has a human-computer interaction function module: the data display interface is included, and the current data value can be refreshed in real time; and a data input area for inputting parameter setting values;
preferably, the barton pipe and the pressure sensor are connected together through a connecting pipe.
Preferably, the gas density relay is further equipped with a timer.
Preferably, the contact bottom surface of the contact piece and the limiting piece are circular and integrally form a bowl shape.
The invention provides a full-range high-precision remote transmission gas density relay and a system for high-voltage electrical equipment, which are used as a plurality of large-stroke micro switches of a gas density relay signal generator, wherein each large-stroke micro switch comprises a shell, an elastic trigger piece, an upper contact, a lower contact, a signal pin, a spring, a guide piece, a trigger rod, a cover cap and a contact piece; the elastic triggering sheet consists of a fixed end, an elastic sheet and a spring connecting section; the large-stroke micro switch has certain elasticity, the elastic performance of the large-stroke micro switch can store energy in advance, the acceleration of the large-stroke micro switch during connection or disconnection is increased, and the large-stroke micro switch has the performance of quick connection and disconnection. The elastic trigger piece is arranged in the shell, one end of the elastic trigger piece is fixed and communicated with the signal pin, the other end of the elastic trigger piece is provided with an upper contact, and a lower contact corresponding to the upper contact is arranged on the other signal pin; the upper and lower contacts are made of silver or made of good conductors plated with gold on the surface, and have high contact capacity. The spring is respectively connected with the elastic trigger piece and the trigger rod, and transmits the trigger acting force received by the trigger rod arranged in the guide piece to the elastic trigger piece so as to drive the upper contact to be communicated with the lower contact and generate a signal; the spring has a large telescopic stroke, so that the stroke of the micro switch can be increased, and the full-range performance of the density relay is realized. The trigger rod of the large-stroke micro switch consists of a guide end and a guide rod end; the guide end of the high-precision density relay is tightly matched with the guide piece of the large-stroke micro switch and can slide relatively freely, the motion track of the high-precision density relay is limited, and the high-precision density relay requirement is met; the contact piece of the large-stroke micro switch consists of a contact bottom surface and a limiting piece; the limiting sheet is right the adjusting screw of density relay has certain direction limiting displacement, ensures the regulation pole with its orbit is stable in the action of triggering, and is reliable, prevents because of the relative triggering bad that sideslips and produce, and then influences the precision performance of density relay. Through the innovation, full-range display can be realized, particularly-0.1 MPa can be displayed, and the field vacuumizing treatment and air supplement are facilitated. Simultaneously, because spacing piece is right density relay's adjusting screw has certain direction limiting displacement, ensure adjust the pole with its orbit is stable in triggering the action in the contact bottom surface, and is reliable, prevents because of sideslipping relatively that produces triggers badly, and then influences density relay's precision performance.
The electrical equipment comprises SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmental protection gas electrical equipment or other insulating gas electrical equipment. The electrical equipment comprises GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas-filled cabinets, ring main units and the like. The gas density relay 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; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6Gas density relay, SF6Mixed gas density relay, N2Gas density relays, other gas density relays, and the like.
Drawings
Fig. 1 is a schematic side view of a first embodiment of the present invention;
FIG. 2 is a schematic front view of a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram illustrating a ventilation state of the long-stroke micro switch according to the first embodiment of the present invention;
FIG. 4 is a schematic structural view of a large-stroke microswitch in an air-leakage state according to a first embodiment of the present invention;
fig. 5 is a circuit diagram according to a first embodiment of the invention.
Wherein, 1, the mechanical part,
101. a shell, 102, a base, 103, a pressure detector, 104, a temperature compensation sheet, 105, a movement, 106, a pointer, 1012, a dial, 108, an end seat, 107, an adjusting rod, 9, a signal generator, 110, an equipment connecting joint, 3, a temperature sensor,
2. the electronic part is provided with a plurality of electronic parts,
201. pressure sensor 2012, communication interface 202, MCU 203, power supply 204, amplifier circuit 205, A/D converter.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 and 2 are schematic structural views of a full-scale high-precision remote gas density relay for high-voltage electrical equipment. As shown in fig. 1 and fig. 2, a full-range high-precision remote gas density relay for high-voltage electrical equipment according to an embodiment of the present invention mainly includes a mechanical portion 1 and an electronic portion 2 independent from the mechanical portion. The electronic part 2 includes: a communication interface 2012, a pressure sensor 201, a power supply 203, an amplifying circuit 204, an A/D converter 205 and an MCU 202; the machine part 1 comprises: a mechanical part shell 101, and a base 102, a pressure detector 103, a temperature compensation sheet 104, a movement 105, a pointer 106, a dial 1012, an end seat 108, an adjusting rod 107, a plurality of signal generators 9, a device connecting joint 110 and a temperature sensor 3 which are arranged in the mechanical part shell. The electronic part 2 comprises an electronic part housing 2010, and a pressure sensor 201, a power supply 203, an amplifying circuit 204, an A/D converter 205 and an MCU202 which are arranged in the electronic part 2 housing. The pressure sensor 201 is fixed in the housing 2010, and the pressure sensor 201 is communicated with the pressure sensor 201 and the detector 103 on an air path. The mechanical part shell 101 and the electronic part shell 2010 are independent or separated from each other, and the MCU202 is connected with the temperature sensor 3, the pressure sensor 201 and the communication interface 2012 respectively. Wherein, one end of the pressure detector 103 and one end of the temperature compensation plate 104 are both fixed on the end seat 108, the other end of the pressure detector 103 is hermetically connected on the base 102, and the other end of the temperature compensation plate 104 is connected with the movement 105; pointer 106 is mounted on movement 105 and is disposed in front of dial 1012. The signal generator 9 adopts a large-stroke micro switch, and a contact signal of the density relay is output through the signal generator 9. The pressure detector 103 adopts a Badon tube, and the temperature compensation sheet 104 adopts a compensation sheet. The gas density relay using the present invention may further include: an oil-filled type density relay, an oil-free type density relay, a gas density meter, a gas density switch, or a gas pressure gauge.
In the remote gas density relay according to the first embodiment of the present invention, the principle is based on the pressure detector 103 and the temperature compensation plate 104 is used to correct the changing pressure and temperature to reflect the change of the (sulfur hexafluoride) gas density. Under the pressure of the measured medium (sulfur hexafluoride) gas, due to the action of the temperature compensation sheet 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 movement 105 by means of the temperature compensation sheet 104, the movement 105 is transmitted to the pointer 106, and the density value of the measured sulfur hexafluoride gas is indicated on the dial 1012. Thus, the gas density relay can display the density value of the (sulfur hexafluoride) gas. If the density value of the sulfur hexafluoride gas is reduced, the pressure detector 103 generates corresponding reverse displacement, the reverse displacement is transmitted to the movement 105 through the temperature compensation sheet 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 1012, and the density of the sulfur hexafluoride gas in equipment such as an electrical switch and the like is monitored and controlled through a mechanical principle, so that the electrical equipment can work safely.
Fig. 3 and 4 show a full-scale high-precision remote gas density relay for high-voltage electrical equipment, which is a large-stroke microswitch 9 as a gas density relay signal generator according to an embodiment of the invention. Wherein, fig. 3 is a schematic structural diagram of a ventilation state of the large-stroke micro switch, and fig. 4 is a schematic structural diagram of an air leakage state of the large-stroke micro switch; the working principle and process for realizing full range of the gas density relay are as follows: the large-stroke microswitch 9 comprises a shell 901, an elastic trigger piece 902, an upper contact 904, a lower contact 905, signal pins 903 and 906, a spring 907, a guide 908, a trigger rod 909, a cap 910 and a contact piece 911; the elastic trigger piece 902 is composed of a fixed end 902A, an elastic piece 902B and a spring connecting section 902C; the large-stroke micro switch 9 has certain elasticity, the elastic performance of the large-stroke micro switch can store energy in advance, the acceleration of the large-stroke micro switch 9 during connection or disconnection is increased, and the large-stroke micro switch has the performance of quick connection and disconnection. The elastic trigger piece 902 is arranged in the shell, a fixed end 902A of the elastic trigger piece is communicated with the signal pin 903, an upper contact 904 is arranged at the end head of the elastic trigger piece 902B, and a lower contact 905 corresponding to the upper contact is arranged on the other signal pin 906; the upper and lower contacts 904 and 905 are made of silver or are made of a good conductor plated with gold on the surface, and have a high contact capacity. The spring 907 is connected with the elastic trigger piece 902 and the trigger rod 909 respectively, and transmits the trigger acting force received by the trigger rod 909 arranged in the guide 908 to the elastic trigger piece 902, so as to drive the upper contact 904 to be communicated with the lower contact 905 and generate a signal; the spring 907 has a large telescopic stroke, so that the stroke of the micro switch can be increased, and the full-range performance of the density relay is realized. The trigger rod 909 of the large-stroke microswitch 9 consists of a guide end 909A and a guide rod end 909B; the guide end 909A of the high-stroke micro-switch is tightly matched with the guide piece 908 of the large-stroke micro-switch 9 and can slide freely relatively, the motion track of the high-stroke micro-switch is limited, and the high-precision requirement of the density relay is met; the contact piece 911 of the large-stroke microswitch consists of a contact bottom surface 911B and a limit piece 911A; the limiting sheet 911A has a certain guiding and limiting effect on the adjusting rod 107 of the density relay, so that the adjusting rod 107 and the contact bottom surface 911B are ensured to have stable and reliable motion tracks in the triggering action, and the poor triggering caused by relative sideslip is prevented, and the precision performance of the density relay is further influenced. In addition, the contact bottom surface 911B and the limiting piece 911A of the contact piece 911 are circular and integrally form a bowl shape, the adjusting screw 10701 is arranged in the center of the bowl shape, the adjusting screw 10701 moves in the bowl shape, and due to the limiting effect of the limiting piece 911A, the vibration resistance can be greatly improved, the adjusting screw 10701 is prevented from jumping out of the contact piece 911, and the problem that the relay fails is solved. Transformer oil is filled in the shell of the gas density relay, the transformer oil can improve the insulating property of the gas density relay, meanwhile, the corrosion of dust or moisture can be prevented, and the service life of the large-stroke micro switch 9 is greatly prolonged.
FIG. 5 is a schematic circuit diagram of a full-scale high-precision remote gas density relay for high-voltage electrical equipment according to an embodiment of the present invention, and as shown in FIG. 5, the density measurement is mainly performed by the pressure sensor 201 and the temperature sensor 3, processed by the amplifier circuit 204, and then converted by the A/D converter 205 to the MCU202, and then performed by the SF6The mathematical model of the relationship between the gas pressure and the temperature adopts a soft measurement method and obtains SF through the operation processing of the MCU2026A density value of the gas; the power source 203 may be: switching power supply, alternating current 220V, direct current power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery and the like. The remote transmission density relay is accessed into the comprehensive automatic on-line monitoring system of the transformer substation through data communication modes such as RS-485 and the like, is remotely transmitted to the central monitoring station of the unattended station, carries out real-time monitoring at the local and remote central monitoring stations of the transformer substation, and realizes SF6SF in electrical equipment6On-line monitoring of gas density.
According to the technical product of the invention, the temperature sensor 3 and the temperature compensation sheet 104 are arranged together; or the temperature sensor 3 is directly arranged on the temperature compensation sheet 104; or the temperature sensor 3 is arranged near the temperature compensation sheet 104. Through the new design treatment, the temperature compensation performance is greatly improved.
In addition, the mechanical part shell of the remote transmission density relay is also internally provided with an outgoing line, and the connecting line of the temperature sensor 3 is connected with the intelligent processor through the outgoing line. The gas density relay further comprises a device connection terminal 110, said device connection terminal 110 being arranged on the mechanical part or the electronic part. The density relay outputs a contact signal via a signal generator 9. The communication interface 2012 is disposed at the electronic part housing or at the mechanical part housing. The pressure sensor 201 is arranged in the housing of the electronic part 2 or the mechanical part 1. The embedded algorithm and control program of the embedded system based on the microprocessor MCU202 automatically control the whole monitoring process, including all peripheral equipment, logic and input and output. The density relay also comprises a movement, a pointer, a dial and a device with indicating value display or digital display, wherein the dial is fixed on the movement, the pointer is fixed on the movement and is arranged in front of the dial and has indicating value display.
The gas density relay can convert the measured pressure value and temperature value into a pressure value P corresponding to 20 ℃ according to gas characteristics20Namely, the gas density relay has the functions of pressure and temperature measurement and software conversion. The intelligent processor may measure relative pressure and absolute pressure type density relays. The gas density relay has a man-machine interaction function: the data display interface is provided, and the current data value can be refreshed in real time; the device has a data input function and can input parameter set values. The intelligent processor is provided with an interface and can finish 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 electric interface of the density relay has a protection function, and the interface cannot be damaged due to misconnection. The information such as test data and/or results can be transmitted remotely through the communication interface 2012. The communication interface 2012 may be located on the electronics housing or on the mechanical housing. The communication mode of the communication interface 2012 can be a wired or wireless mode. The pressure detector 103 and the pressure sensor 201 are connected together through a connecting pipe. The electronic part 2 is arranged on the back of the shell of the gas density relay mechanical part 1 or on the shell or on the equipment connecting joint 110. A clock is also included and can record the test time. The power source 203 (power module) further comprises a power supply circuit, or a battery, or a circularly rechargeable battery, or solar energy, or a power source obtained by electricity getting from a mutual inductor, or an induction power source, etc. The control of the electronic part of the density relay can be completed through field control, background control or mutual interaction of the field control and the background control. The gas density relay has the functions of real-time online density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the likeAnd (4) performing functions. The gas density relay has a self-diagnosis function and can inform abnormality in time. Such as a wire break, short alarm, sensor damage, etc. When the density of the gas density relay monitors that the gas pressure has a rising trend on line, an abnormal notice should be put forward in time. The gas density relay also comprises a camera for monitoring the gas density relay. The gas density relay has protection to the environmental temperature of the electronic components, prevents the electronic components from working at too low temperature or too high temperature and enables the electronic components to work in an allowable temperature range. A heater and/or a radiator (fan) can be arranged, the heater is started at low temperature, and the radiator (fan) is started at high temperature, so that the pressure sensor and/or the integrated circuit and other electronic elements can reliably work in low-temperature or high-temperature environments. The gas density relay has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on the electrical equipment and the density relay.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. The utility model provides a high accuracy teletransmission formula sulfur hexafluoride gas density relay of full range, is including being used for the baton pipe of intercommunication sulfur hexafluoride air chamber, its characterized in that: the system comprises a mechanical part provided with a displacement end moving in the full range and an electronic part for collecting the air pressure in the Barton tube and outputting a remote transmission signal; one or more signal generators for providing output alarm and/or locking contact signals are arranged at the movable end of the bourdon tube, each signal generator is internally provided with a large-stroke micro switch, and each large-stroke micro switch comprises a signal pin, an elastic trigger piece for communicating a loop between the signal pins, a trigger rod reciprocating along a guide piece and a spring for connecting the trigger rod and the movable end of the elastic trigger piece; the trigger rod is pushed by the movable end of the bourdon tube and drives the elastic trigger piece to be communicated with a loop where the elastic trigger piece is located through the spring; the stroke of the trigger rod is larger than the stroke of the connection point of the elastic trigger piece and the spring.
2. The full-range high-precision remote transmission type sulfur hexafluoride gas density relay according to claim 1, wherein: the movable end of the elastic trigger piece is provided with an upper contact, a lower contact, a signal pin, a spring, a guide piece, a trigger rod, a cover cap and a contact piece; one end of the elastic trigger piece is fixed and communicated with the signal pin, the other end of the elastic trigger piece is provided with the upper contact, and the lower contact corresponding to the upper contact is arranged on the other signal pin;
the spring is arranged between the elastic trigger piece and the trigger rod, and transmits the trigger acting force received by the trigger rod arranged in the guide piece to the elastic trigger piece, so that the upper contact and the lower contact are driven to be connected to generate a signal.
3. The full-range high-precision remote transmission type sulfur hexafluoride gas density relay according to claim 2, wherein: the contact piece is fixedly connected with one end of the trigger rod, serves as a signal trigger force receiving part of the large-stroke micro switch, and receives and conducts the signal trigger force of the adjusting screw of the density relay;
the elastic triggering sheet consists of a fixed end, an elastic sheet and a movable end comprising a spring connecting section; the elastic trigger piece is installed in an elastic deformation state with pre-stored energy so as to increase the acceleration of the large-stroke micro switch when the large-stroke micro switch is switched on or switched off and enable the large-stroke micro switch to have the performance of quick switching on and switching off;
the trigger rod consists of a guide end and a guide rod end; the guide end of the large-stroke micro switch is tightly matched with the guide piece of the large-stroke micro switch, the large-stroke micro switch freely slides relative to the guide piece, and the guide piece limits the whole motion track;
the inner wall of the guide piece is smooth and is arranged on the shell of the large-stroke micro switch; the contact piece consists of a contact bottom surface and a limiting piece; the limiting piece has a guiding and limiting effect on the adjusting rod of the density relay.
4. The full-range high-precision remote transmission type sulfur hexafluoride gas density relay according to claim 1, wherein: the temperature compensation device comprises a shell, a base, a machine core, an end cap, a temperature compensation sheet, a plurality of signal generators, an adjusting rod, a pressure sensor, a temperature sensor, an amplifying circuit, an A/D converter, an MCU, a data communication interface and a power supply; one end of the Bardon tube is welded on the base, the other end of the Bardon tube is connected with one end of the temperature compensation sheet through the end cap, the other end of the temperature compensation sheet is connected with the adjusting rod, the right end of the adjusting rod is provided with an adjusting screw, and the left end of the adjusting rod is connected with the machine core; the large-stroke micro switch is arranged below the adjusting rod and is opposite to the adjusting screw;
under the triggering action force of the adjusting screw, the large-stroke micro switch enables the large-stroke micro switch to send out a corresponding signal, and the function of outputting an alarm and/or locking a contact signal by the density relay is completed; on the gas path, the pressure sensor is communicated with the Badon tube, and the temperature sensor is arranged in the shell; the power supply respectively supplies power to the pressure sensor, the temperature sensor, the amplifying circuit, the A/D converter, the MCU and the data communication interface; the pressure sensor and the temperature sensor process the collected pressure signal and temperature signal through the amplifying circuit, and then upload the signals to the MCU through A/D conversion, and the MCU transmits the signals to the MCU according to SF6The mathematical model of the relationship between the gas pressure and the temperature adopts a soft measurement method to obtain SF through operation processing6Density value P of gas20Then the density value P can be remotely transmitted through a data communication interface20And the pressure value and the temperature value are used for realizing the online monitoring of the gas density value of the electrical equipment.
5. The full-range high-precision remote sulfur hexafluoride gas density relay according to claim 1, wherein the large-stroke micro switches are arranged into any one number of 1 group, 2 groups, 3 groups or 4 groups of switches according to different requirements, and each group of switches sends out signals together or individually.
6. The full-range high-precision remote sulfur hexafluoride gas density relay as claimed in claim 4, comprising a power supply, wherein the power supply is located remotely from the temperature sensor and the temperature compensation plate.
7. The full-range high-precision remote sulfur hexafluoride gas density relay as claimed in claim 4, further comprising equipment connection joints, wherein the equipment connection joints are arranged on the lower side or the rear side of the shell.
8. The full-scale high-precision remote sulfur hexafluoride gas density relay as claimed in claim 4, wherein the pressure sensor measures a relative pressure or absolute pressure type density relay.
9. The full-range high-precision remote sulfur hexafluoride gas density relay as claimed in claim 8, wherein the bourdon tube and the pressure sensor are connected together through a connecting tube, and the gas path is communicated.
10. The full-range high-precision remote sulfur hexafluoride gas density relay as claimed in claim 1, wherein the gas density relay is further provided with a timer; and transformer oil is also filled in the shell of the gas density relay.
11. The full-range high-precision remote sulfur hexafluoride gas density relay as claimed in claim 1, comprising a human-computer interaction function module, wherein the human-computer interaction function module comprises a data display interface so as to refresh the current data value in real time; and a data input area for inputting parameter setting values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647147.5A CN111952105B (en) | 2020-07-07 | 2020-07-07 | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647147.5A CN111952105B (en) | 2020-07-07 | 2020-07-07 | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111952105A CN111952105A (en) | 2020-11-17 |
| CN111952105B true CN111952105B (en) | 2022-07-12 |
Family
ID=73340487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010647147.5A Active CN111952105B (en) | 2020-07-07 | 2020-07-07 | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111952105B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595628B (en) * | 2020-11-23 | 2024-04-05 | 国网安徽省电力有限公司检修分公司 | Oilless anti-seismic remote sulfur hexafluoride gas density monitor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615527A (en) * | 2008-06-26 | 2009-12-30 | 上海乐研电气科技有限公司 | The method for selecting width of a kind of gas density relay and Baden's pipe manufacturer thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231918A (en) * | 2008-02-03 | 2008-07-30 | 上海乐研电气科技有限公司 | Antivibration type SF6 gas density relay |
| WO2014113912A1 (en) * | 2013-01-22 | 2014-07-31 | Jin Haiyong | Sulfur hexafluoride high-voltage electrical equipment used in cold regions |
| CN103456561B (en) * | 2013-09-18 | 2017-01-18 | 上海乐研电气科技有限公司 | High-precision sulfur hexafluoride gas density relay |
| CN103456562B (en) * | 2013-09-18 | 2016-06-15 | 上海乐研电气科技有限公司 | A kind of sulfur hexafluoride gas density relay |
| CN103594284B (en) * | 2013-11-20 | 2016-01-20 | 上海乐研电气科技有限公司 | A kind of sulfur hexafluoride gas density relay |
| CN204314743U (en) * | 2014-10-15 | 2015-05-06 | 秦川机床集团宝鸡仪表有限公司 | Integral type SF6 gas density controller |
| CN104299844B (en) * | 2014-10-21 | 2016-08-24 | 上海乐研电气科技有限公司 | A kind of wide range sulfur hexafluoride gas density relay |
| CN104299846B (en) * | 2014-10-31 | 2017-01-11 | 国家电网公司 | Wireless remote transmission type sulfur hexafluoride gas density relay |
| CN204424129U (en) * | 2015-01-09 | 2015-06-24 | 上海奇佳电子有限公司 | Long Distances sensitive switch |
| CN107808798B (en) * | 2017-11-29 | 2020-10-09 | 上海乐研电气有限公司 | Miniaturized wide-range gas density relay |
| CN107968018B (en) * | 2018-01-12 | 2023-12-08 | 上海乐研电气有限公司 | High vibration-resistant gas density relay |
| CN208833887U (en) * | 2018-08-15 | 2019-05-07 | 国网浙江省电力有限公司电力科学研究院 | A kind of multrirange sulfur hexafluoride density relay tester |
| CN111192790A (en) * | 2020-03-11 | 2020-05-22 | 上海乐研电气有限公司 | Wide-range high-vibration-resistance gas density relay |
-
2020
- 2020-07-07 CN CN202010647147.5A patent/CN111952105B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615527A (en) * | 2008-06-26 | 2009-12-30 | 上海乐研电气科技有限公司 | The method for selecting width of a kind of gas density relay and Baden's pipe manufacturer thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111952105A (en) | 2020-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103675669B (en) | Breaker electrical endurance monitoring system and method | |
| CN103744018A (en) | On-line monitoring system aiming at high-voltage circuit breaker | |
| CN203732254U (en) | Circuit breaker mechanical characteristic online monitoring device | |
| CN202759183U (en) | Intelligent solid insulating switch cabinet | |
| CN110567841A (en) | Multifunctional gas density monitor and monitoring system | |
| CN111952105B (en) | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay | |
| CN110595941A (en) | Medium-high voltage electrical equipment gas leakage monitor and monitoring system | |
| CN105425147A (en) | High-voltage circuit breaker contact temperature rise and service life online monitoring system | |
| CN110568351A (en) | High-precision gas density monitor and monitoring system based on edge calculation | |
| CN110441681B (en) | High-medium-voltage precise remote gas density relay and gas density monitoring system | |
| CN104101381A (en) | Online monitoring system of mining high voltage distribution device | |
| CN204216476U (en) | A kind of modularization intelligent box fixes gas-filled type high-voltage alternating metal enclosed switchgear | |
| CN210720051U (en) | Overvoltage-resistant gas density transmitter and monitoring system | |
| CN110411894B (en) | Gas density monitoring system | |
| CN216698221U (en) | Remote transmission gas density relay | |
| CN205263268U (en) | High voltage circuit breaker contact temperature rise and life -span on -line monitoring system | |
| CN106989830A (en) | A kind of contact of breaker temperature measuring equipment | |
| CN212008850U (en) | Intelligent primary and secondary fused on-column circuit breaker | |
| CN113758653A (en) | Method for monitoring SF6 density relay in real time and pre-judging air leakage | |
| CN211426166U (en) | Gas density relay with online self-checking function and monitoring device | |
| CN110850278A (en) | Electromechanical integrated gas density relay | |
| CN214122406U (en) | High-medium-voltage precise remote transmission gas density relay and gas density monitoring system | |
| CN110567840A (en) | Overvoltage-resistant gas density transmitter and monitoring system | |
| CN113701932B (en) | Device and method for online telemetering of clamping force and temperature of contact finger contact of isolating switch | |
| CN201576078U (en) | System for detecting electric life state of vacuum circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |