CN104319172B - A kind of telemetering type sulfur hexafluoride gas density micro-water relay - Google Patents
A kind of telemetering type sulfur hexafluoride gas density micro-water relay Download PDFInfo
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- CN104319172B CN104319172B CN201410602445.7A CN201410602445A CN104319172B CN 104319172 B CN104319172 B CN 104319172B CN 201410602445 A CN201410602445 A CN 201410602445A CN 104319172 B CN104319172 B CN 104319172B
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- temperature
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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
-
- 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
Abstract
The present invention relates to a kind of telemetering type sulfur hexafluoride gas density micro-water relay, can apply on sulfur hexafluoride electrical equipment.Including housing (8), this housing (8) outside is installed with junction block (15) and joint (9) respectively, pedestal (5) it is installed with in this housing (8), it is characterized in: also include 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 with displacement is connected, this displacement is reduced the output of mechanism (7) and is connected with pointer (2), on pedestal (5), additionally also it is installed with dial (1).The invention provides a kind of precision height, the good electric property of signal generator, contacts good, telemetering type sulfur hexafluoride gas density micro-water relay with density, micro-water content transporting function can also be realized simultaneously.
Description
Technical field
The present invention relates to a kind of telemetering type sulfur hexafluoride gas density micro-water relay, can apply six
On sulfur fluoride electrical equipment.
Background technology
Sulfur hexafluoride electric product has been widely used at power department, and industrial and mining enterprises promote electric power row
The fast development of industry.Ensure that the reliable and secure operation of sulfur hexafluoride electric product has become power department
One of vital task.The arc-extinguishing medium of sulfur hexafluoride electric product and dielectric are sulfur hexafluoride gas
Body, it is impossible to leak gas, if leaking gas, cannot ensure that sulfur hexafluoride electric product is reliable and secure
Run.So the sulfur hexafluoride density value of monitoring sulfur hexafluoride electric product is the most necessary.At present,
The pointer sulfur hexafluoride gas being used for monitoring the commonly used a kind of machinery of sulfur hexafluoride gas density is close
Degree relay (seeing Fig. 1) monitors sulfur hexafluoride gas density, i.e. when sulfur hexafluoride electric product
When occurring to leak gas, this relay can be reported to the police and locking, simultaneously can also displaying scene density value.This density
Relay typically use dial, pointer, single Baden pipe, single temperature-compensating sheet, pedestal, movement and
Hairspring type magnetic helps formula electric contact.
When contact (reporting to the police or locking) Guan Bi, its closing force is only by the small power of contact hairspring, i.e.
Make to help the power of formula plus magnetic, the least, be the most extremely afraid of to shake, and contact Guan Bi jail the most not
Lean on.And the most important thing is when being aoxidized or pollute, often there is the phenomenon of electric contact loose contact,
Cause serious consequence.Additionally especially it is emphasised that magnetic helps the breaking speed of formula electric contact relatively slowly, and touch
Point capacity is little, causes service life short.So this density monitor is just difficult to ensure that electric property and longevity
Life, once goes wrong, and user only changes again, causes economic loss, it is impossible to meets very well and wants
Ask.
The most most importantly, at present for monitoring this kind of machinery of SF6 gas density
SF6 gas density relay monitors SF6 gas density, there is also defect highlighted below: 1) SF6
When electric product occurs gas leakage, only when its gas pressure drops to alarming value, just send alarm signal
Number, and now SF6 gas have leaked a lot.Such as rated pressure is the SF6 electricity of 0.6Mpa
The commonly used alarm pressure of gas equipment is 0.52Mpa, the density monitor of locking pressure 0.50Mpa.
The most a lot of transformer stations are all unattended operation transformer stations, so for this SF6 electrical equipment,
If it occur that gas leakage, its gas when rated pressure 0.6Mpa drops to alarm pressure 0.52Mpa,
Operator on duty just finds, just notifies that maintainer removes in-situ processing leakage accident, and now SF6 gas
Have leaked a lot.So at unattended operation transformer station, it is also very desirable to on-line monitoring SF6 electrically sets
Standby density, finds the gas leakage of SF6 electrical equipment in time.2) this density monitor contact one
As use hairspring type magnetic help formula electric contact.During its closing of contact, its closing force is the least, and contact Guan Bi is not
Enough firm.And the most important thing is when being aoxidized or pollute, often there is showing of electric contact loose contact
As, cause inefficacy, produce serious consequence.
Therefore in the urgent need to improving and innovation, a kind of contact good electric property, contacts are created steady
The telemetering type sulfur hexafluoride gas density relay fixed, antidetonation is good.It is also well known that SF6 gas
Effect in high voltage electric equipment is arc extinguishing and insulation, micro-water of SF6 gas in high voltage electric equipment
If content exceeds standard to reduce with density will have a strong impact on the safe operation of SF6 high voltage electric equipment: 1)
In the presence of some metal objects, SF6 gas can hydrolyze with water in 200 DEG C of temperatures above of high temperature
Reaction, generates active HF and SOF2, etching insulative part and metalwork, and produces amount of heat,
Air chamber pressure is made to raise.2) when temperature reduces, too much moisture content is likely to be formed condensation water, makes absolutely
Edge part surface insulation intensity significantly reduces, and even flashover causes serious harm.3) SF6 gas density
It is reduced to a certain degree to cause the forfeiture of insulation and arc extinction performance.Therefore grid operation codes forces rule
Fixed, all the bulk density and water content of SF6 gas periodically must be examined before putting equipment in service and in running
Survey.
For micro-water monitoring, current commonly used off-line method measures micro-water content: main employing is portable
Formula dew point hygrometer carries out Site Detection, and it exists following defect: (1) is non real-time.Power department one at present
As use the SF6 gas micro water content of dew point hygrometer detection SF6 electrical equipments for 1 year 2 times, this is a kind of
Non real-time detection method, it can not reflect the variation tendency that equipment runs, also cannot be to SF6 gas
The variation tendency of micro-water content is predicted, it is impossible to grasp the operation conditions of electrical equipment, it is impossible in time
Prevention and eliminating potential safety hazard, it is impossible to by intelligent equipment repair based on condition of component standard, accurate evaluation, judgement
Status of equipment, it is difficult to realize the repair based on condition of component of electrical equipment.(2) measurement is limited by environment temperature.Dew
The operating ambient temperature of some instrument is-10 DEG C～+50 DEG C.Meanwhile, different environment temperatures, it measures model
It is different for enclosing, and the winter in the north and discomfort in southern summer are fit to do the SF6 gas micro water content at scene
Test.Owing to being affected by weather and environment temperature, the data of detection only refer to.(3) time-consuming,
Bothersome, take gas.Need to discharge SF6 gas for a long time when using dew point hygrometer test, this is due to probe tube
Road containing wetly, during measurement before 3-5 minute needs dry up sampling line；In order to test is arrived
The SF6 gas micro water content of SF6 inside electric appliance, it is necessary to a certain amount of SF6 gas is discharged
Out, the test of a usual complete and accurate about needs about 10～15 minutes.By standard sample gas
Flow, i.e. 30～40L/h calculate, and once test needs to discharge SF6 gas about 8 liters.So, exist
It is accomplished by after completing to test several times supplementing SF6 gas.It addition, testing staff's operation lack of standardization, also deposit
In potential safety hazard.(4) high testing cost.Electric company need to be equipped with inspection for completing detection work
The SF6 gas of personnel, equipment, vehicle and high value.Rough calculation, the fraction of the year of each transformer station per
Stand testing cost about tens thousand of to about tens0000 yuan.(5) harm field personnel is healthy, dirty
Dye air.SF6 gas is certainly as nontoxic gas, but can generate some after pyroreaction and have
Poison pernicious gas, has harm greatly to the person.And SF6 gas is a kind of greenhouse gases, state
Border regulation can not be directly discharged into air.
In order to ensure the reliability service of SF6 electrical equipment, improve power system continuous reliability service ability,
Its performance is realized presence detection, monitoring and failure predication, becomes in the application of SF6 electrical equipment
Important research direction.Along with unattended operation transformer station is to remote control, the requirement of remote measurement, on-line monitoring SF6
The SF6 gas density value of electrical equipment and micro-water content have very important practical significance.Along with nothing
People transformer station on duty to networking, digitlization direction develops and requirement to remote control, remote measurement constantly adds
By force, so the SF6 gas density of SF6 electrical equipment and the on-line monitoring of micro-water content state are had
Important realistic meaning.
In sum, the electric property of current sulfur hexafluoride gas density relay is the best or connects
Point cantact is not sufficiently stable, cannot realize the transporting function of density value and micro-water content, it is difficult to realize SF6
The SF6 gas density of electrical equipment and the on-line monitoring of micro-water, thus a kind of electrically in the urgent need to innovation
Performance is good, contacts is reliable, antidetonation is good, realize having density, the continuing of micro-water transporting function simultaneously
Electrical equipment, the high performance telemetering type sulfur hexafluoride gas density i.e. needing density micro-water teletransmission integration is micro-
Water relay.
Summary of the invention
It is an object of the invention to provide that a kind of precision is high, there is shock-absorbing function, signal generator electric
Telemetering type sulfur hexafluoride gas density micro-water relay that performance is good, contacts is good.
A kind of telemetering type sulfur hexafluoride gas density micro-water relay, including housing, in this hull outside
Upper be installed with junction block and joint respectively, in this housing, be installed with pedestal, its especially it
Place is: also include Bourdon tube, one end of this Bourdon tube be fixed on described pedestal its other end with
One end of temperature-compensating sheet connects, and the other end of this temperature-compensating sheet reduces machine by connector and displacement
The input of structure connects, and this displacement is reduced the output of mechanism and is connected with pointer, additionally on pedestal also
It is installed with dial.
Wherein Bourdon tube uses c-type Bourdon tube, and connector uses connecting rod.
Its center tap is by pipeline and temperature sensor, pressure sensor and the micro-water sensor on pedestal
Connection.
Wherein the output of temperature sensor, pressure sensor and micro-water sensor passes sequentially through amplification electricity
Road, single-chip microcomputer, digital analog converter, voltage current adapter are connected with electric current galvanostat, this electricity
The output of stream galvanostat is also connected with junction block, thus the pressure collected, temperature and micro-water is believed
Number being converted into density value becomes 4-20mA current signal to export with reconvert after micro-water content value；Or its
The output of middle temperature sensor, pressure sensor and micro-water sensor is connected with junction block respectively, from
And 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 equipped with case.
Wherein the fan-shaped curved surface transmission mechanism of mechanism's employing is reduced in displacement, and it specifically includes train wheel bridge and lower folder
Plate, is separately installed with the fan-shaped curved surface gear being meshed between this train wheel bridge and lower plate by rotating shaft
And central gear, this sector curved surface gear reduces the input of mechanism as displacement, and this central gear
Rotating shaft reduce the output of mechanism as displacement.
Wherein the radius of the radius ratio central gear of fan-shaped curved surface gear is little.
Wherein being additionally provided with signal generator in described housing, this signal generator includes being fixed on pedestal
On at least one microswitch, and be provided with in the rotating shaft of central gear and coordinate with this microswitch
Signal Regulation mechanism, it is thus possible to trigger miniature when the rotating shaft of this central gear rotates to certain angle
Switch, and all microswitches are all connected with junction block.
Wherein Signal Regulation mechanism specifically in the rotating shaft of central gear install with microswitch number
Measure equal eccentric wheel.
In order to solve the problems referred to above that prior art exists, the present invention provides a kind of precision height, letter
Number good electric property of generator, contacts are good, realize having density, micro-water content teletransmission simultaneously
Sulfur hexafluoride gas density micro-water relay of function, for controlling and monitoring in sealing container lithium
The density of sulphur gas and micro-water content, and for the gas leakage feelings occurred in sulfur hexafluoride electrical equipment
Condition and micro-water content, send alarm signal and block signal in time, realize SF6 electrical equipment simultaneously
SF6 gas density and the on-line monitoring of micro-water, for ensure electric power safety play a role.
Compared with prior art, also there is following clear advantage and feature: the particularly micro-water of density is remote
Pass integration.Owing to also using pressure sensor, temperature sensor, micro-water sensor, pass through pressure
Sensor, temperature sensor, micro-water sensor gather pressure, temperature and micro-water content signal, pass through
Single-chip microcomputer processes and is converted into density value and micro-water content, turns through digital analog converter, voltage x current
After parallel operation and electric current galvanostat process, it is possible to sulfur hexafluoride gas density value and micro-water content are converted into
Current signal, it is achieved long-distance transmissions, and then realize on-line monitoring sulfur hexafluoride gas electrical equipment
Density and micro-water content.And the displacement of Baden's pipe and temperature-compensating sheet reduces mechanism this position through displacement
Shifting is reduced, then removes control signal generator (some microswitches), reaches the purpose of damping.This position
Move the size control microswitch reducing mechanism according to gas density value, make microswitch send accordingly
Signal, completes the function of density monitor, thus the highest problem of resistance to shock overcoming prior art,
Ensure that the advantages such as good, the long working life of the good electric property of density monitor, contacts, real again
Show density micro-water teletransmission integration, it is ensured that system reliably working, can apply at hexafluoro well
Change on sulphur electrical equipment.
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.
Detailed description of the invention
As shown in Fig. 2,3,4,5, the invention provides a kind of telemetering type sulfur hexafluoride gas density
Micro-water relay, including housing 8, outside this housing 8 on be installed with junction block 15 He respectively
Joint 9, is installed with pedestal 5 in this housing 8, also includes Bourdon tube 3, this Bourdon tube 3
One end is fixed on described pedestal 5 that its other end is connected with one end of temperature-compensating sheet 4, this temperature
The input that the other end of compensating plate 4 reduces mechanism 7 by connector with displacement is connected, and this displacement is contracted
The output of little mechanism 7 is connected with pointer 2, is additionally also installed with dial 1 on pedestal 5.
Wherein Bourdon tube 3 uses c-type Bourdon tube, and connector uses connecting rod 6.Wherein (lithium
Sulphur gas) joint 9 by pipeline and the temperature sensor 20 on pedestal 5, pressure sensor 21 and
(pressure sensor 21 directly contacts the connection of micro-water sensor with sulfur hexafluoride gas, temperature sensor
20 can directly contact with sulfur hexafluoride gas maybe can be not directly contacted with).Wherein temperature sensor 20,
The output of pressure sensor 21 and micro-water sensor passes sequentially through amplifying circuit, single-chip microcomputer 23, number
Word analog converter, voltage current adapter are connected with electric current galvanostat, the output of this electric current galvanostat
End is also connected with junction block, thus the pressure collected, temperature and micro-water signal are converted into density value
4-20mA current signal is become to export with reconvert after micro-water content value；Or wherein temperature sensor 20,
The output of pressure sensor 21 and micro-water sensor is connected with junction block 15 respectively, thus will gather
To pressure, temperature and micro-water signal directly export.
Wherein on housing 8, by sealing ring, watch crystal 17 is installed, watch crystal 17 is also installed
There is case 16.
Further, wherein displacement is reduced mechanism 7 and is used fan-shaped curved surface transmission mechanism, and it specifically includes
Train wheel bridge 75 and lower plate, be separately installed with phase by rotating shaft between this train wheel bridge 75 and lower plate
The fan-shaped curved surface gear 71 of engagement and central gear 73, this sector curved surface gear 71 reduces as displacement
The input of mechanism 7, 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.
Additionally being additionally provided with signal generator in described housing 8, this signal generator includes being fixed on base
At least one (such as 3) microswitch 10 on seat 5, and in the rotating shaft of central gear 73
The Signal Regulation mechanism 11 coordinated with this microswitch 10 is installed, it is thus possible at this central gear 73
Rotating shaft (as a example by 3 microswitches 10, both triggered microswitch 10 when rotating to certain angle
Can trigger, it is possible to so that the triggering amounts of 3 switches are different simultaneously, different to represent three kinds respectively
Gas pressure situation), the most all microswitches 10 are all connected with junction block 15.Wherein signal is adjusted
It is equal with microswitch 10 quantity that joint mechanism 11 specifically installs in the rotating shaft of central gear 73
Some eccentric wheels.
In order to enable preferably technical scheme to be understood, below by specific embodiment
And combine accompanying drawing the present invention is described in detail:
Embodiment 1:
Referring to Fig. 2,3,4 and 5, the present invention is a kind of micro-water of telemetering type sulfur hexafluoride gas density
Relay, reduces mechanism including Bourdon tube 3, temperature-compensating sheet 4, pedestal 5, connecting rod 6, displacement
7, housing 8, joint 9, microswitch 10, Signal Regulation mechanism 11, linking arm 13, Guan Maozuo
14, junction block 15, watch crystal 17, case 16, temperature sensor 20, pressure sensor 21, put
Big circuit, single-chip microcomputer, power module, digital analog converter, voltage current adapter, electric current are permanent
Stream device, printing (circuit) plate 28, electric wire 12 and switch reinforcing mechanisms, the present embodiment is micro-with three
Type switch 10 is as gas density relay signal generator, and this gas density relay also carries useful
Dial 1 and pointer 2 in display indicating value.Wherein, temperature sensor 20 seals and is fixed on pedestal 5
Right flank, and temperature sensor 20 contacts with each other with sulfur hexafluoride gas, can accurately measure
Temperature value to sulfur hexafluoride gas.Pressure sensor 21 seals and is fixed on after pedestal 5, and
Amplifying circuit, single-chip microcomputer, power module, digital analog converter, voltage current adapter, electric current
Galvanostat is 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 converter, 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
Force snesor 21, temperature sensor 20, the survey to pressure, temperature and micro-water content of micro-water sensor
Amount, amplifies the signal measuring the pressure, temperature and the micro-water content that arrive through amplifying circuit, this amplification
The signal of pressure, temperature and micro-water content through the collection of single-chip microcomputer 23, in single-chip microcomputer 23
Portion is calculated sulfur hexafluoride gas density P20And micro-water content PPM, this sulfur hexafluoride gas density
P20It is allowed to be converted into voltage signal through the conversion of digital analog converter with micro-water content PPM
P20UMicro-water content PPMU, the most again through the conversion of voltage current adapter, make voltage signal
P20UAnd PPMUIt is converted into the P of current signal20IAnd PPMI, then the effect through overcurrent galvanostat,
Make the sulfur hexafluoride gas density P of current signal20IWith micro-water content PPMICan long-distance transmissions, enter
And realize density and the micro-water content of on-line monitoring sulfur hexafluoride gas electrical equipment.Above-mentioned single-chip microcomputer
Signals collecting, internal calculation, all use existing conventional techniques means with voltage signal output etc..Such as
Internal calculation process calculates especially by formula or inquires about the SF under relevant temperature pressure condition6Density number
According to obtaining.
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, pipe emits one end of seat 14 and temperature-compensating sheet 4 and is fixed together, temperature-compensating sheet 4
The other end is fixed together with linking arm 13；Linking arm 13 one end with connecting rod 6 again fixes,
The other end of connecting rod 6 reduces the initiating terminal of mechanism 7 and is connected with displacement；Displacement reduces mechanism 7 for fan
Shape curved surface transmission mechanism.Microswitch 10 is separately fixed on pedestal 5, and microswitch 10 carries respectively
Operations with contacts handle 1011.Signal Regulation mechanism 11 and three microswitch 10 corresponding pairs are arranged
And be separately mounted on central shaft 72, central shaft 72 is extension and and the gear of gear shaft 70
Axle 70 is integrally formed.Signal Regulation mechanism 11 is three bias being periodically installed on central shaft 72
Wheel.Dial 1 is fixed on pedestal 5, and pointer 2 is fixed on the front end of movement gear shaft 70.Letter
Number governor motion 11 drives contact operation handle 1011 according to gas density value and force value, makes miniature
Contact on switch 10 or disconnection；The contact of microswitch 10 is connected to connect by electric wire 12
On line seat 15, junction block 15 is fixed on housing 8；Joint 9 is fixed on housing 8, watch crystal
17, case 16 and sealing ring thereof are separately fixed on housing 8, can exempt from by protective housing 8 internal mechanism
It is mechanically damaged and invades with dirt, rainwater.One end of deferent is connected with pedestal 5, and reliably seals；
The other end of deferent is connected with joint 9, and reliably seals；Switch reinforcing mechanisms (switch reinforcement machine
Structure is joined together by several reinforcements and is fixed on, with screw, nut, the side that each fine motion (type) switchs,
Form reinforcing mechanisms adaptive with the width of switch housing respectively, only the shell of each microswitch is risen
Well booster action, it is shaped as rectangle) be fixed on microswitch 10, carry out at switch
When breaking-closing operating produces judder, microswitch 10 shell can be avoided to rupture, and avoid miniature
The contact operation handle 1011 of switch 10 comes off, thus is greatly improved the resistance to shock of relay,
Guarantee system reliably working.
Seeing Fig. 4, linking arm 13 one end with connecting rod 6 again is connected, the other end of connecting rod 6
The initiating terminal reducing mechanism 7 with displacement is connected；It is fan-shaped curved surface transmission mechanism that mechanism 7 is reduced in displacement,
It includes 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, train wheel bridge 75 and lower plate it
Between connect a fan-shaped curved surface rotary gear shaft 710, the center of circle of fan-shaped curved surface gear 71 is the most integrally prolonged
Stretching a transmission arm 711, fan-shaped curved surface gear 71 is arranged on fan-shaped curved surface rotary gear shaft 710, transmission
One end of arm 711 is connected as the other end of initiating terminal and connecting rod 6 that mechanism 7 is reduced in displacement；In
Heart gear 73 as displacement reduce mechanism 7 reduce end be fixedly mounted on gear shaft 70 and with fan
The engagement of shape curved surface gear 71 connects；Radius ratio central gear 73 due to fan-shaped curved surface gear 71
Radius little 3 times be its 1/3, it is possible to play the effect of reducing.The sulfur hexafluoride gas of the present invention
Density monitor uses microswitch 10, and the control of microswitch 10 contact due to signal generator
System is all reduced mechanism 7 by displacement and passes through to reduce and controlled later, utilizes this displacement to reduce 7, mechanism
Displacement is reduced, and purpose makes vibration reduce, and reaches damping moral effect.
When gas density value changes, Bourdon tube 3 and temperature-compensating sheet 4 produce displacement, this displacement
Being delivered to displacement by connecting rod 6 and reduce the initiating terminal of mechanism 7, what mechanism 7 was reduced in displacement reduces end
(central gear 73 and gear shaft 70) is by the contact of Signal Regulation mechanism 11 with microswitch 10
Operation handle 1011 connects, and drives contact operation handle 1011 according to gas density value and force value,
Make the contact on microswitch 10 or disconnection, and then make microswitch 10 send (to open accordingly
Pass is measured) signal, complete the function of density monitor.
The sulfur hexafluoride gas density relay of the present invention is based on flexible member Bourdon tube 3, utilizes temperature
The pressure and temperature of change is modified by degree compensating plate 4, the change of reaction sulfur hexafluoride gas density.
I.e. under the pressure effect of measured medium sulfur hexafluoride gas, because of the effect of temperature-compensating sheet 4,
The change of its density value, force value changes the most accordingly, forces the end of Bourdon tube 3 to produce corresponding
Elastic deformation displacement, by means of temperature-compensating sheet 4 and connecting rod 6, passes to displacement and reduces mechanism
The gear shaft 70 of 7, gear shaft 70 passes to again pointer 2, then by tested sulfur hexafluoride gas density
Value indicates on dial 1.If gas leakage, its density value drops to and to a certain degree (reaches
Report to the police or locking value), Bourdon tube 3 produces corresponding to bottom offset, by temperature-compensating sheet 4, the company of making
Connecing arm 13 to bottom offset, pass to connecting rod 6, connecting rod 6 passes to displacement and reduces mechanism 7, fan
Oblique crank Z 71 passes to central shaft and reduces, and central shaft 72 drives corresponding Signal Regulation mechanism 11
Rotating, time to a certain extent, Signal Regulation mechanism 11 just triggers the contact of corresponding microswitch 10
Operation handle 1011, corresponding microswitch 10 contact is switched on, and sends corresponding signal and (reports to the police
Or locking), reach the sulfur hexafluoride gas density monitoring and controlling in the equipment such as electric switch, make electricity
Gas equipment trouble free service.If its density value increases, force value raises the most accordingly, is increased to one
Determining degree, Bourdon tube 3 also produces and shifts up accordingly, by temperature-compensating sheet 4, makes linking arm
13 shift up, and pass to connecting rod 6, and connecting rod 6 passes to displacement and reduces mechanism 7, fan-shaped axle
71 pass to central shaft 72, and central shaft 72 drives corresponding Signal Regulation mechanism 11, to a certain extent
Time, Signal Regulation mechanism 11 does not the most trigger corresponding microswitch 10, and corresponding microswitch 10 connects
Point just disconnects, and signal (reporting to the police or locking) just releases.
In sum, the sulfur hexafluoride gas density relay of the present invention uses pressure sensor 21, temperature
Degree sensor 20, micro-water sensor, adopted by pressure sensor, temperature sensor, micro-water sensor
Collection pressure, temperature and micro-water content signal, process through single-chip microcomputer 23 and be converted into density value and Wei Shui
Content, after digital analog converter, voltage current adapter and electric current galvanostat process, it is possible to
Sulfur hexafluoride gas density value and micro-water content are converted into corresponding current signal (4-20mA), it is achieved
Long-distance transmissions, and then realize the density of on-line monitoring sulfur hexafluoride gas electrical equipment and micro-water contains
Amount.The signals collecting of above-mentioned single-chip microcomputer, internal calculation, with voltage signal output etc. all use existing often
Rule technological means.
Additionally this density monitor is due to signal generator employing microswitch 10, and microswitch
The controlling of 10 contacts is all reduced mechanism 7 by displacement and passes through to reduce and controlled later, and purpose makes vibration subtract
Few, reach damping moral effect, so resistance to shock is high, contact good electric property, life-span length, temperature
Compensate performance more accurate.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to
The bright present invention's, and it is not used as limitation of the invention, as long as at the connotation model of the present invention
In enclosing, the variant of embodiment described above is all fallen in the range of claims of the present invention.
Claims (1)
1. telemetering type sulfur hexafluoride gas density micro-water relay, including housing (8), this housing (8) outside is installed with junction block (15) and joint (9) respectively, pedestal (5) it is installed with in this housing (8), it is characterized in that: also include 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 with displacement is connected, this displacement is reduced the output of mechanism (7) and is connected with pointer (2), on pedestal (5), additionally also it is installed with dial (1)；
Wherein Bourdon tube uses c-type Bourdon tube, and connector uses connecting rod；
Its center tap (9) is connected with the temperature sensor (20) on pedestal (5), pressure sensor (21) and micro-water sensor by pipeline；
Wherein the output of temperature sensor (20), pressure sensor (21) and micro-water sensor passes sequentially through amplifying circuit, single-chip microcomputer (23), digital analog converter, voltage current adapter are connected with electric current galvanostat, the output of this electric current galvanostat is also connected with junction block (15), thus the pressure collected, temperature and micro-water signal is converted into density value and becomes 4-20mA current signal to export with reconvert after micro-water content value；
Or wherein the output of temperature sensor (20), pressure sensor (21) and micro-water sensor is connected with junction block (15) respectively, 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 equipped with case；
Wherein the fan-shaped curved surface transmission mechanism of mechanism (7) employing is reduced in displacement, it specifically includes train wheel bridge (75) and lower plate, it is separately installed with the fan-shaped curved surface gear (71) and central gear (73) being meshed by rotating shaft between this train wheel bridge (75) and lower plate, this sector 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；
Wherein the radius of the radius ratio central gear (73) of fan-shaped curved surface gear (71) is little；
Wherein in described housing (8), it is additionally provided with signal generator, this signal generator includes at least one microswitch (10) being 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), it is thus possible to trigger microswitch (10) when the rotating shaft of this central gear (73) rotates to certain angle, and all microswitches (10) are all connected with junction block (15)；
The eccentric wheel equal with microswitch (10) quantity that wherein Signal Regulation mechanism (11) specifically installs in the rotating shaft of central gear (73).
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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 |
| CN110364390A (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 with self-test |
| 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 |
| CN110441681B (en) * | 2019-09-04 | 2023-08-29 | 上海乐研电气有限公司 | High-medium-voltage precise remote gas density relay and gas density monitoring system |
| 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 |
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