CN104319172A - Teletransmission sulfur hexafluoride gas density and trace moisture relay - Google Patents
Teletransmission sulfur hexafluoride gas density and trace moisture relay Download PDFInfo
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- CN104319172A CN104319172A CN201410602445.7A CN201410602445A CN104319172A CN 104319172 A CN104319172 A CN 104319172A CN 201410602445 A CN201410602445 A CN 201410602445A CN 104319172 A CN104319172 A CN 104319172A
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- sulfur hexafluoride
- gas density
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- hexafluoride gas
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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
- H01H35/36—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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/28—Compensation for variation of ambient pressure or temperature
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a teletransmission sulfur hexafluoride gas density and trace moisture relay which can be used for sulfur hexafluoride electrical equipment. The relay comprises a shell (8), a wire holder (15) and a connector (9) are fixedly installed on the outside of the shell (8), and a base (5) is fixedly installed in the shell (8). The relay is characterized in that a bourdon tube (3) is further included, one end of the bourdon tube (3) is fixed to the base (5), the other end of the bourdon tube (3) is connected with one end of a temperature compensation piece (4), the other end of the temperature compensation piece (4) is connected with the input end of a displacement reducing mechanism (7) through a connection piece, the output end of the displacement reducing mechanism (7) is connected with a pointer (2), and additionally, a dial (1) is fixedly installed on the base (5). According to the teletransmission sulfur hexafluoride gas density and trace moisture relay, precision is high, electrical performance of a signal generator is good, contact performance of contacts is good, and meanwhile, a density and trace moisture content teletransmission function is achieved.
Description
Technical field
The present invention relates to the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density, can be applied on sulfur hexafluoride electrical equipment.
Background technology
Sulphur hexafluoride electric product is widely used in power department, industrial and mining enterprises, facilitates the fast development of power industry.Ensure reliable and secure operation one of vital task becoming power department of sulphur hexafluoride electric product.The arc-extinguishing medium of sulphur hexafluoride electric product and dielectric are sulfur hexafluoride gas, can not leak gas, if leak gas, just can not ensure the reliable and secure operation of sulphur hexafluoride electric product.So the sulfur hexafluoride density value of monitoring sulphur hexafluoride electric product is very necessary.At present, being used for monitoring sulfur hexafluoride gas density generally adopts a kind of pointer sulfur hexafluoride gas density relay (see Fig. 1) of machinery to monitor sulfur hexafluoride gas density, namely when gas leakage occurs sulphur hexafluoride electric product, this relay can be reported to the police and locking, simultaneously can also displaying scene density value.This density monitor generally adopts dial, pointer, single Baden pipe, single temperature-compensating sheet, pedestal, movement and hairspring type magnetic to help formula electric contact.
When contact (reporting to the police or locking) is closed, its closing force is only by the small power of contact hairspring, even if add that magnetic helps the power of formula, also still very little, be therefore extremely afraid of to shake, and contact is closed also firm not.And the most important thing is when being oxidized or pollute, the normal phenomenon that electric contact loose contact occurs, causes serious consequence.Ben is in addition that magnetic helps the breaking speed of formula electric contact comparatively slow, and contact capacity is little, causes useful life short.So this density monitor is just difficult to ensure electric property and life-span, once go wrong, user only has and again changes, and causes economic loss, can not meet the demands very well.
Most importantly simultaneously, the SF6 gas density relay of this kind of machinery of monitoring SF6 gas density be used at present to monitor SF6 gas density, also there is following outstanding defect: when 1) gas leakage occurs SF6 electric product, only have when its gas pressure drops to alarming value, just send alarm signal, and now SF6 gas have leaked a lot.Such as rated pressure is that the SF6 electric equipment of 0.6Mpa generally adopts alarm pressure to be the density monitor of 0.52Mpa, locking pressure 0.50Mpa.A lot of transformer station is all unattended operation transformer station now, like this for this SF6 electric equipment, if leaked gas, when its gas drops to alarm pressure 0.52Mpa from rated pressure 0.6Mpa, operator on duty just finds, just notify that maintainer removes in-situ processing leakage accident, and now SF6 gas have leaked a lot.So at unattended operation transformer station, be starved of the density of on-line monitoring SF6 electric equipment, the Leakage Gas of Timeliness coverage SF6 electric equipment.2) this density monitor contact generally adopts hairspring type magnetic to help formula electric contact.During its closing of contact, its closing force is very little, and contact is closed firm not.And the most important thing is when being oxidized or pollute, the normal phenomenon that electric contact loose contact occurs, causes inefficacy, produces serious consequence.
Therefore in the urgent need to improvement and bring new ideas, create a kind of contact good electric property, contacts is stablized, telemetering type sulfur hexafluoride gas density relay that antidetonation is good.Well-known in addition, the effect of SF6 gas in high voltage electric equipment is arc extinguishing and insulation, if in high voltage electric equipment the micro-water content of SF6 gas exceed standard and density reduce the safe operation that will have a strong impact on SF6 high voltage electric equipment: 1) in the presence of some metal objects, SF6 gas high temperature more than 200 DEG C temperature can with water generation hydrolysis, generate active HF and SOF2, etching insulative part and metalwork, and produce amount of heat, air chamber pressure is raised.2) when temperature reduces, too much moisture content may form condensation water, and insulating part surface insulation intensity is significantly reduced, and even flashover, causes serious harm.3) SF6 gas density is reduced to and to a certain degree will causes the forfeiture of insulation and arc extinction performance.Therefore grid operation codes mandatory provision, all must carry out periodic detection to the bulk density and water content of SF6 gas before putting equipment in service and in running.
For micro-water monitoring, off-line method is generally adopted to measure micro-water content at present: the portable dew point hygrometer of main employing carries out Site Detection, and it exists following defect: (1) is non real-time.The SF6 gas micro water content that current power department adopts for general one year 2 times dew point hygrometer to detect SF6 electric equipment, this is a kind of non real-time detection method, it can not reflect the variation tendency that equipment runs, also cannot predict the variation tendency of SF6 gas micro water content, the operation conditions of electric equipment cannot be grasped, can not prevent in time and get rid of potential safety hazard, cannot by intelligent equipment repair based on condition of component standard, accurate evaluation, judgment device situation, be difficult to the repair based on condition of component realizing electric equipment.(2) measurement limits by ambient temperature.The operating ambient temperature of dew point hygrometer is-10 DEG C ~+50 DEG C.Meanwhile, different ambient temperatures, its measuring range is different, the winter in the north and the uncomfortable SF6 gas micro water content test being fit to do scene in southern summer.Owing to being subject to the impact of weather and ambient temperature, the data of detection only can reference.(3) time-consuming, bothersome, take gas.Adopt during dew point hygrometer test and need long-time discharge SF6 gas, this is that before during measurement, 3-5 minute needs dry up sampling line because sampling line is containing wetly; In order to test the SF6 gas micro water content of SF6 inside electric appliance, just need a certain amount of SF6 gas discharging out, the test of a usual complete and accurate about needs about 10 ~ 15 minutes.By standard sample gas flow, namely 30 ~ 40L/h calculates, and once test needs discharge SF6 gas about 8 liters.So, after completing test several times, supplementary SF6 gas is just needed.In addition, also there is potential safety hazard in testing staff's operation lack of standardization.(4) high testing cost.Electric company has been the SF6 gas that testing need be equipped with reviewer, equipment, vehicle and high value.Rough calculation, the testing cost of sharing every year of each transformer station about tens thousand of to about tens0000 yuan.(5) field personnel is endangered healthy, atmosphere pollution.SF6 gas certainly as nontoxic gas, but can generate some toxic and harmfuls after pyroreaction, has great harm to the person.And SF6 gas is a kind of greenhouse gas, international regulations directly can not enter air.
In order to ensure the reliability service of SF6 electric equipment, improving the continuous reliability service ability of electric power system, presence being realized to its performance and detects, monitor and failure predication, becoming important research direction in the application of SF6 electric equipment.Along with unattended operation transformer station is to the requirement of remote control, remote measurement, SF6 gas density value and the micro-water content of on-line monitoring SF6 electric equipment have very important practical significance.Along with unattended operation transformer station is constantly strengthened to networking, digitlization future development and the requirement to remote control, remote measurement, so have important practical significance to the SF6 gas density of SF6 electric equipment and the on-line monitoring of micro-water content state.
In sum, the transporting function that the electric property of current sulfur hexafluoride gas density relay is good not or contacts is stable not, cannot realize density value and micro-water content, be difficult to realize the SF6 gas density of SF6 electric equipment and the on-line monitoring of micro-water, so in the urgent need to innovating a kind of good electric property, contacts is reliable, antidetonation good, realize having the relay of density, micro-water transporting function simultaneously, namely needs the micro-water relay of high performance telemetering type sulfur hexafluoride gas density of density micro-water teletransmission integration.
Summary of the invention
The object of this invention is to provide a kind of precision high, there is shock-absorbing function, the good electric property of signal generator, the micro-water relay of telemetering type sulfur hexafluoride gas density that contacts is good.
The micro-water relay of a kind of telemetering type sulfur hexafluoride gas density, comprise housing, this hull outside is installed with junction block and joint respectively, at this housing internal fixtion, pedestal is installed, its special feature is: also comprise Bourdon tube, one end of this Bourdon tube is fixed on described pedestal that its other end is connected with one end of temperature-compensating sheet, the input that the other end of this temperature-compensating sheet reduces mechanism by connector and displacement is connected, the output that mechanism is reduced in this displacement is connected with pointer, is also installed with dial in addition on pedestal.
Wherein Bourdon tube adopts C type Bourdon tube, and connector adopts connecting rod.
Its center tap is communicated with micro-water sensor with the temperature sensor on pedestal, pressure sensor by pipeline.
Wherein temperature sensor, pressure sensor are connected with electric current galvanostat by amplifying circuit, single-chip microcomputer, digital analog converter, voltage current adapter successively with the output of micro-water sensor, the output of this electric current galvanostat is also connected with junction block, thus converts the output of 4-20mA current signal after converting the pressure collected, temperature and micro-water signal to density value and micro-water content value again to; Or wherein temperature sensor, pressure sensor are connected with junction block respectively with the output of micro-water sensor, thus the pressure collected, temperature and micro-water signal are directly exported.
Wherein on housing, by sealing ring, watch crystal is installed, watch crystal is also provided with case.
Wherein displacement is reduced mechanism and is adopted fan-shaped curved surface transmission mechanism, it specifically comprises train wheel bridge and lower plate, be separately installed with the fan-shaped curved surface gear and central gear that are meshed by rotating shaft between this train wheel bridge and lower plate, this fan-shaped curved surface gear reduces the input of mechanism as displacement, and the rotating shaft of this central gear reduces the output of mechanism as displacement.
Wherein the radius of the radius ratio central gear of fan-shaped curved surface gear is little.
Wherein in described housing, be also provided with signal generator, this signal generator comprises at least one microswitch be fixed on pedestal, and the Signal Regulation mechanism coordinated with this microswitch is installed in the rotating shaft of central gear, thus can trigger microswitch when the rotating shaft of this central gear rotates to certain angle, and all microswitches are all connected with junction block.
The wherein eccentric wheel equal with microswitch quantity specifically installed in the rotating shaft of central gear of Signal Regulation mechanism.
In order to solve the problems referred to above that prior art exists, it is of the present invention that to provide a kind of precision high, the good electric property of signal generator, contacts is good, realize that there is density simultaneously, the micro-water relay of sulfur hexafluoride gas density of micro-water content transporting function, for density and the micro-water content of sulfur hexafluoride gas in control & monitor airtight container, and for the Leakage Gas situation occurred in sulfur hexafluoride electrical equipment and micro-water content, send alarm signal and block signal in time, realize the on-line monitoring of SF6 gas density to SF6 electric equipment and micro-water simultaneously, for ensureing that electric power safety plays a role.
Compared with prior art, also there is following obvious advantage and disadvantage: the particularly micro-water teletransmission integration of density.Owing to also adopting pressure sensor, temperature sensor, micro-water sensor, pressure, temperature and micro-water content signal is gathered by pressure sensor, temperature sensor, micro-water sensor, density value and micro-water content is converted to through single-chip microcomputer process, after digital analog converter, voltage current adapter and the process of electric current galvanostat, can sulfur hexafluoride gas density value and micro-water content be converted to current signal, realize long-distance transmissions, and then realize density and the micro-water content of on-line monitoring sulfur hexafluoride gas electric equipment.And the displacement of Baden's pipe and temperature-compensating sheet is reduced mechanism through displacement and this displacement is reduced, then removes control signal generator (some microswitches), reaches the object of damping.This displacement is reduced mechanism and is controlled microswitch according to the size of gas density value, microswitch is made to send corresponding signal, complete the function of density monitor, thus the not high problem of the resistance to shock overcoming prior art, ensure that the advantages such as the good electric property of density monitor, contacts are good, long working life, achieve again the micro-water teletransmission integration of density, ensure that system reliably working, can be applied on sulfur hexafluoride electrical equipment well.
Accompanying drawing explanation
Fig. 1 is the structural representation of background technology middle finger pin type sulfur hexafluoride gas density relay;
Fig. 2 is the structural representation of gas density relay of the present invention;
Fig. 3 is the partial structurtes schematic diagram of gas density relay of the present invention;
Fig. 4 is the structural representation that in gas density relay of the present invention, mechanism 7 part is reduced in displacement;
Fig. 5 is the circuit theory diagrams of gas density relay of the present invention.
Embodiment
As Fig. 2, 3, 4, shown in 5, the invention provides the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density, comprise housing 8, junction block 15 and joint 9 is installed with respectively on outside this housing 8, at this housing 8 internal fixtion, pedestal 5 is installed, also comprise Bourdon tube 3, one end of this Bourdon tube 3 is fixed on described pedestal 5 that its other end is connected with one end of temperature-compensating sheet 4, the input that the other end of this temperature-compensating sheet 4 reduces mechanism 7 by connector and displacement is connected, the output that mechanism 7 is reduced in this displacement is connected with pointer 2, dial 1 is also installed with in addition on pedestal 5.
Wherein Bourdon tube 3 adopts C type Bourdon tube, and connector adopts connecting rod 6.Wherein (sulfur hexafluoride gas) joint 9 is communicated with micro-water sensor with the temperature sensor 20 on pedestal 5, pressure sensor 21 (pressure sensor 21 directly contacts with sulfur hexafluoride gas, and temperature sensor 20 directly can contact with sulfur hexafluoride gas or can not directly contact) by pipeline.Wherein temperature sensor 20, pressure sensor 21 are connected with electric current galvanostat by amplifying circuit, single-chip microcomputer 23, digital analog converter, voltage current adapter successively with the output of micro-water sensor, the output of this electric current galvanostat is also connected with junction block, thus converts the output of 4-20mA current signal after converting the pressure collected, temperature and micro-water signal to density value and micro-water content value again to; Or wherein temperature sensor 20, pressure sensor 21 are connected with junction block 15 respectively with the output of micro-water sensor, thus the pressure collected, temperature and micro-water signal are directly exported.
Wherein on housing 8, by sealing ring, watch crystal 17 is installed, watch crystal 17 is also provided with case 16.
Further, wherein displacement is reduced mechanism 7 and is adopted fan-shaped curved surface transmission mechanism, it specifically comprises train wheel bridge 75 and lower plate, be separately installed with the fan-shaped curved surface gear 71 and central gear 73 that are meshed by rotating shaft between this train wheel bridge 75 and lower plate, this fan-shaped curved surface gear 71 reduces the input of mechanism 7 as displacement, and the rotating shaft of this central gear 73 reduces the output of mechanism 7 as displacement.Wherein the radius of the radius ratio central gear 73 of fan-shaped curved surface gear 71 is little.
Also signal generator is provided with in addition in described housing 8, this signal generator comprises at least one (the such as 3) microswitch 10 be fixed on pedestal 5, and the Signal Regulation mechanism 11 coordinated with this microswitch 10 is installed in the rotating shaft of central gear 73, thus microswitch 10 can be triggered when the rotating shaft of this central gear 73 rotates to certain angle (for 3 microswitches 10, both can trigger simultaneously, also the triggering amount of 3 switches can be made different, to represent three kinds of different gas pressure situation respectively), all microswitches 10 are all connected with junction block 15 in addition.The wherein some eccentric wheels equal with microswitch 10 quantity specifically installed in the rotating shaft of central gear 73 of Signal Regulation mechanism 11.
In order to understand technical scheme of the present invention better, also by reference to the accompanying drawings the present invention is described in detail below by specific embodiment:
Embodiment 1:
Refer to Fig. 2, 3, 4 and 5, the present invention is the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density, comprise Bourdon tube 3, temperature-compensating sheet 4, pedestal 5, connecting rod 6, mechanism 7 is reduced in displacement, housing 8, joint 9, microswitch 10, Signal Regulation mechanism 11, linking arm 13, pipe emits seat 14, junction block 15, watch crystal 17, case 16, temperature sensor 20, pressure sensor 21, amplifying circuit, single-chip microcomputer, power module, digital analog converter, voltage current adapter, electric current galvanostat, print (circuit) plate 28, electric wire 12 and switch reinforcing mechanisms, the present embodiment is using three microswitches 10 as gas density relay signal generator, this gas density relay is also with the dial 1 for showing indicating value and pointer 2.Wherein, temperature sensor 20 sealing is fixed on the right flank of pedestal 5, and temperature sensor 20 and sulfur hexafluoride gas contact with each other, and accurately can measure the temperature value of sulfur hexafluoride gas.Pressure sensor 21 sealing is fixed on after pedestal 5, and amplifying circuit, single-chip microcomputer, power module, digital analog converter, voltage current adapter, electric current galvanostat are fixed on printing (circuit) plate, and printed board 28 is positioned at after pedestal 5, and after housing 8, amplifying circuit, single-chip microcomputer, power module, digital analog converter, voltage current adapter, electric current galvanostat are positioned at the surrounding of pressure sensor 21.
Operation principle or the step of telemetering type sulfur hexafluoride gas density micro-water relay are as follows: by pressure sensor 21, temperature sensor 20, micro-water sensor to the measurement of pressure, temperature and micro-water content, through amplifying circuit, the signal of the pressure measured, temperature and micro-water content is amplified, the signal of the pressure of this amplification, temperature and micro-water content, through the collection of single-chip microcomputer 23, obtains sulfur hexafluoride gas density P through single-chip microcomputer 23 internal calculation
20and micro-water content PPM, this sulfur hexafluoride gas density P
20make it through the conversion of digital analog converter the P converting voltage signal to micro-water content PPM
20Umicro-water content PPM
u, then again through the conversion of voltage current adapter, make the P of voltage signal
20Uand PPM
uconvert the P of current signal to
20Iand PPM
i, then through the effect of overcurrent galvanostat, make the sulfur hexafluoride gas density P of current signal
20Iwith micro-water content PPM
ican long-distance transmissions, and then realize density and the micro-water content of on-line monitoring sulfur hexafluoride gas electric equipment.Signals collecting, the internal calculation of above-mentioned single-chip microcomputer, all adopt existing routine techniques means with voltage signal output etc.Such as internal calculation process is especially by the SF under formulae discovery or inquiry relevant temperature pressure condition
6density data can obtain.
And one end of the Bourdon tube 3 of density monitor is welded on pedestal 5, the other end is welded on pipe and emits on seat 14, and pipe emits seat 14 to be fixed together with one end of temperature-compensating sheet 4, and the other end and the linking arm 13 of temperature-compensating sheet 4 are fixed together; Linking arm 13 fixes with one end of connecting rod 6 again, and the initiating terminal that mechanism 7 is reduced in the other end and the displacement of connecting rod 6 is connected; Displacement reduces mechanism 7 for fan-shaped curved surface transmission mechanism.Microswitch 10 is separately fixed on pedestal 5, and microswitch 10 is respectively with contact operating grip 1011.Signal Regulation mechanism 11 and three microswitch 10 corresponding pairs arrange and are arranged on central shaft 72 respectively, and central shaft 72 is the extension of gear shaft 70 and is integrally formed with gear shaft 70.Signal Regulation mechanism 11 is the eccentric wheel that three compartment of terrains are arranged on central shaft 72.Dial 1 is fixed on pedestal 5, and pointer 2 is fixed on the front end of movement gear shaft 70.Signal Regulation mechanism 11 drives contact operating grip 1011 according to gas density value and force value, makes the contact on microswitch 10 or disconnection; The contact of microswitch 10 is connected on junction block 15 by electric wire 12, and junction block 15 is fixed on housing 8; Joint 9 is fixed on housing 8, and watch crystal 17, case 16 and sealing ring thereof are separately fixed on housing 8, can invade from mechanical damage and dirt, rainwater by protective housing 8 internal mechanism.One end of deferent is connected with pedestal 5, and positiver sealing, the other end of deferent is connected with joint 9, and positiver sealing, (switch reinforcing mechanisms joins together with screw by several reinforcements switch reinforcing mechanisms, nut is fixed on the side of each fine motion (type) switch, formed respectively with the reinforcing mechanisms of the width adaptation of switch housing, only good booster action is played to the shell of each sensitive switch, its shape is rectangle) be fixed on microswitch 10, when switch carries out breaking-closing operating generation judder, microswitch 10 shell can be avoided to rupture, and avoid the contact operating grip 1011 of microswitch 10 to come off, thus the resistance to shock of relay can greatly be improved, guarantee system reliably working.
See Fig. 4, linking arm 13 is connected with one end of connecting rod 6 again, and the initiating terminal that mechanism 7 is reduced in the other end and the displacement of connecting rod 6 is connected; Displacement reduces mechanism 7 for fan-shaped curved surface transmission mechanism, and it comprises gear shaft 70, fan-shaped curved surface gear 71, central gear 73, train wheel bridge 75, lower plate; Train wheel bridge 75 and lower plate are fixed on support 5 at interval and in parallel, a fan-shaped curved surface rotary gear shaft 710 is connected between train wheel bridge 75 and lower plate, the center of circle also radially one extension one transmission arm 711 of fan-shaped curved surface gear 71, fan-shaped curved surface gear 71 is arranged on fan-shaped curved surface rotary gear shaft 710, and one end of transmission arm 711 reduces mechanism 7 initiating terminal as displacement is connected with the other end of connecting rod 6; The end that reduces that central gear 73 reduces mechanism 7 as displacement to be fixedly mounted on gear shaft 70 and to be connected with a joggle with fan-shaped curved surface gear 71; Radius due to the radius ratio central gear 73 of fan-shaped curved surface gear 71 little 3 times be its 1/3, so can the effect of reducing be played.Sulfur hexafluoride gas density relay of the present invention is due to signal generator employing microswitch 10, and the control of microswitch 10 contact is all reduced mechanism 7 by displacement and was controlled afterwards by reducing, utilize this displacement to reduce mechanism 7 displacement is reduced, object makes vibration reduce, and reaches damping moral effect.
When gas density value changes, Bourdon tube 3 and temperature-compensating sheet 4 produce displacement, this is displaced through connecting rod 6 and is delivered to the initiating terminal that mechanism 7 is reduced in displacement, the end (central gear 73 and gear shaft 70) that reduces that mechanism 7 is reduced in displacement is connected with the contact operating grip 1011 of microswitch 10 by Signal Regulation mechanism 11, contact operating grip 1011 is driven according to gas density value and force value, make the contact on microswitch 10 or disconnection, and then make microswitch 10 send (switching value) signal accordingly, complete the function of density monitor.
Sulfur hexafluoride gas density relay of the present invention is based on flexible member Bourdon tube 3, utilizes the pressure and temperature of temperature-compensating sheet 4 to change to revise, the change of reaction sulfur hexafluoride gas density.Namely under the pressure effect of measured medium sulfur hexafluoride gas, owing to there being the effect of temperature-compensating sheet 4, the change of its density value, force value also changes accordingly, force the end of Bourdon tube 3 to produce corresponding strain-displacement, by means of temperature-compensating sheet 4 and connecting rod 6, pass to the gear shaft 70 that mechanism 7 is reduced in displacement, gear shaft 70 passes to again pointer 2, then tested sulfur hexafluoride gas density value is indicated on dial 1.If leaked gas, its density value drops to a certain degree (reaching warning or locking value), Bourdon tube 3 produces corresponding to bottom offset, by temperature-compensating sheet 4, make linking arm 13 to bottom offset, pass to connecting rod 6, connecting rod 6 passes to displacement and reduces mechanism 7, fan-shaped axle 71 passes to central shaft and reduces, central shaft 72 drives corresponding Signal Regulation mechanism 11 to rotate, time to a certain extent, Signal Regulation mechanism 11 just triggers the contact operating grip 1011 of corresponding microswitch 10, corresponding microswitch 10 contact is just connected, send corresponding signal (reporting to the police or locking), reach the sulfur hexafluoride gas density in the equipment such as monitoring and controlling electric switch, make electric equipment trouble free service.If its density value increases, force value also raises accordingly, be elevated to a certain degree, Bourdon tube 3 also produces corresponding to top offset, by temperature-compensating sheet 4, make linking arm 13 to top offset, pass to connecting rod 6, connecting rod 6 passes to displacement and reduces mechanism 7, and fan-shaped axle 71 passes to central shaft 72, and central shaft 72 drives corresponding Signal Regulation mechanism 11, time to a certain extent, Signal Regulation mechanism 11 does not just trigger corresponding microswitch 10, and corresponding microswitch 10 contact just disconnects, and signal (reporting to the police or locking) is just removed.
In sum, sulfur hexafluoride gas density relay of the present invention adopts pressure sensor 21, temperature sensor 20, micro-water sensor, pass through pressure sensor, temperature sensor, micro-water sensor gathers pressure, temperature and micro-water content signal, density value and micro-water content is converted to through single-chip microcomputer 23 process, through digital analog converter, after voltage current adapter and the process of electric current galvanostat, can sulfur hexafluoride gas density value and micro-water content be converted to corresponding current signal (4-20mA), realize long-distance transmissions, and then realize density and the micro-water content of on-line monitoring sulfur hexafluoride gas electric equipment.Signals collecting, the internal calculation of above-mentioned single-chip microcomputer, all adopt existing routine techniques means with voltage signal output etc.
This density monitor is due to signal generator employing microswitch 10 in addition, and the control of microswitch 10 contact is all reduced mechanism 7 by displacement and was controlled afterwards by reducing, object makes vibration reduce, reach damping moral effect, so resistance to shock is high, contact good electric property, life-span length, temperature-compensating performance are more accurate.
Those of ordinary skill in the art will be appreciated that, it is of the present invention that above embodiment is only used to explanation, and be not used as limitation of the invention, as long as in spirit of the present invention, the variant of the above embodiment is all dropped in Claims scope of the present invention.
Claims (9)
1. the micro-water relay of telemetering type sulfur hexafluoride gas density, comprise housing (8), this housing (8) outside is installed with junction block (15) and joint (9) respectively, at this housing (8) internal fixtion, pedestal (5) is installed, it is characterized in that: also comprise Bourdon tube (3), one end of this Bourdon tube (3) is fixed on that described pedestal (5) is upper and its other end is connected with one end of temperature-compensating sheet (4), the input that the other end of this temperature-compensating sheet (4) reduces mechanism (7) by connector and displacement is connected, the output that mechanism (7) is reduced in this displacement is connected with pointer (2), dial (1) is also installed with in addition on pedestal (5).
2. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 1, is characterized in that: wherein Bourdon tube adopts C type Bourdon tube, and connector adopts connecting rod.
3. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 1, is characterized in that: its center tap (9) is communicated with micro-water sensor with the temperature sensor (20) on pedestal (5), pressure sensor (21) by pipeline.
4. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 3, it is characterized in that: wherein temperature sensor (20), pressure sensor (21) are connected with electric current galvanostat by amplifying circuit, single-chip microcomputer (23), digital analog converter, voltage current adapter successively with the output of micro-water sensor, the output of this electric current galvanostat is also connected with junction block (15), thus converts the output of 4-20mA current signal after converting the pressure collected, temperature and micro-water signal to density value and micro-water content value again to;
Or wherein temperature sensor (20), pressure sensor (21) are connected with junction block (15) respectively with the output of micro-water sensor, thus the pressure collected, temperature and micro-water signal are directly exported.
5. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 1, is characterized in that: wherein on housing, be provided with watch crystal by sealing ring, watch crystal is also provided with case.
6. as the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density in claim 1 to 5 as described in any one, it is characterized in that: wherein displacement is reduced mechanism (7) and adopted fan-shaped curved surface transmission mechanism, it specifically comprises train wheel bridge (75) and lower plate, be separately installed with the fan-shaped curved surface gear (71) and central gear (73) that are meshed by rotating shaft between this train wheel bridge (75) and lower plate, this fan-shaped curved surface gear (71) reduces the input of mechanism (7) as displacement, and the output of mechanism (7) is reduced in the rotating shaft of this central gear (73) as displacement.
7. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 6, is characterized in that: wherein the radius of the radius ratio central gear (73) of fan-shaped curved surface gear (71) is little.
8. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 6, it is characterized in that: wherein in described housing (8), be also provided with signal generator, this signal generator comprises at least one microswitch (10) be fixed on pedestal (5), and the Signal Regulation mechanism (11) coordinated with this microswitch (10) is installed in the rotating shaft of central gear (73), thus microswitch (10) can be triggered when the rotating shaft of this central gear (73) rotates to certain angle, and all microswitches (10) are all connected with junction block (15).
9. the micro-water relay of a kind of telemetering type sulfur hexafluoride gas density as claimed in claim 8, is characterized in that: the wherein eccentric wheel equal with microswitch (10) quantity specifically installed in the rotating shaft of central gear (73) of Signal Regulation mechanism (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110364391A (en) * | 2019-07-16 | 2019-10-22 | 上海上芃电气有限公司 | A kind of SF6 gas teletransmission density monitor of the micro- water one of density |
| CN110441681A (en) * | 2019-09-04 | 2019-11-12 | 上海乐研电气有限公司 | A kind of accurate teletransmission gas density relay of high, middle pressure and gas density monitor system |
| CN110567840A (en) * | 2019-09-04 | 2019-12-13 | 上海乐研电气有限公司 | Overvoltage-resistant gas density transmitter and monitoring system |
| CN112595628A (en) * | 2020-11-23 | 2021-04-02 | 国网安徽省电力有限公司检修分公司 | Oil-free anti-seismic remote transmission type sulfur hexafluoride gas density monitor |
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| CN104319172B (en) | 2016-09-07 |
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