CN104282485A - Remote-transmission sulfur hexafluoride gas density relay - Google Patents
Remote-transmission sulfur hexafluoride gas density relay Download PDFInfo
- Publication number
- CN104282485A CN104282485A CN201410601680.2A CN201410601680A CN104282485A CN 104282485 A CN104282485 A CN 104282485A CN 201410601680 A CN201410601680 A CN 201410601680A CN 104282485 A CN104282485 A CN 104282485A
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- China
- Prior art keywords
- sulfur hexafluoride
- gas density
- hexafluoride gas
- density relay
- displacement
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Classifications
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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
Abstract
The invention relates to a remote-transmission sulfur hexafluoride gas density relay which can be applied to sulfur hexafluoride electrical equipment. The remote-transmission sulfur hexafluoride gas density relay comprises a shell (8), a wire holder (15) and a splice (9) are fixedly installed on the outer side of the shell (8) respectively, and a base (5) is fixedly installed in the shell (8). The remote-transmission sulfur hexafluoride gas density relay is characterized by further comprising a bourdon tube (3), one end of the bourdon tube (3) is fixed onto 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 connecting piece, the output end of the displacement reducing mechanism (7) is connected with a pointer (2), and additionally, a dial (1) is further fixedly installed on the base (5). The sulfur hexafluoride gas density relay is high in precision and can realize the density remote-transmission function; the electrical performance of a signal generator is good, and contacting of contacts is good.
Description
Technical field
The present invention relates to a kind of telemetering type sulfur hexafluoride gas density relay, 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 Bourdon tube, 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, be used at present monitoring SF simultaneously
6the SF of this kind of machinery of gas density
6gas density relay monitors SF
6, also there is following outstanding defect: 1) SF in gas density
6when gas leakage occurs electric product, only have when its gas pressure drops to alarming value, just send alarm signal, and now SF
6gas have leaked a lot.Such as rated pressure is the SF of 0.6Mpa
6electric equipment 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 SF
6electric equipment, if leaked gas, when its gas drops to alarm pressure 0.52Mpa from rated pressure 0.6Mpa, operator on duty has just found, just notifies that maintainer removes in-situ processing leakage accident, and now SF
6gas have leaked a lot.So at unattended operation transformer station, be starved of on-line monitoring SF
6the density of electric equipment, Timeliness coverage SF
6the Leakage Gas of 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 a kind of contact good electric property, contacts is stablized, antidetonation is good telemetering type sulfur hexafluoride gas density relay.
In order to ensure SF
6the reliability service of electric equipment, improves the continuous reliability service ability of electric power system, realizes presence and detects, monitors and failure predication, become SF to its performance
6important research direction in electric equipment application.Along with unattended operation transformer station is to the requirement of remote control, remote measurement, on-line monitoring SF
6the SF of electric equipment
6gas density value has very important practical significance.In addition along with unattended operation transformer station is constantly strengthened, so to SF to networking, digitlization future development and the requirement to remote control, remote measurement
6the SF of electric equipment
6the on-line monitoring of gas density also has important practical significance.
In sum, the good not or contacts of the electric property of current sulfur hexafluoride gas density relay is stable not, the transporting function that cannot realize density value, is difficult to realize SF
6the SF of electric equipment
6the on-line monitoring of gas density, thus in the urgent need to a kind of good electric property, contacts is reliable, antidetonation good, realize having the sulfur hexafluoride gas density relay of density transporting function simultaneously.
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, telemetering type sulfur hexafluoride gas density relay that contacts is good.
A kind of telemetering type sulfur hexafluoride gas density relay, 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 pressure sensor with the temperature sensor on pedestal by pipeline.
Wherein temperature sensor is connected with electric current galvanostat by amplifying circuit, single-chip microcomputer, digital analog converter, voltage current adapter successively with the output of pressure 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 and temperature signal collected to density value again to; Or wherein temperature sensor is connected with junction block respectively with the output of pressure sensor, thus the pressure and temperature signal collected directly is 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, the invention provides that a kind of precision is high, the good electric property of signal generator, contacts are good, the sulfur hexafluoride gas density relay with density transporting function can also be realized simultaneously, may be used for the density of sulfur hexafluoride gas in control & monitor airtight container, and for the Leakage Gas situation occurred in sulfur hexafluoride electrical equipment, send alarm signal and block signal in time, realize SF simultaneously
6the SF of electric equipment
6the on-line monitoring of gas density, for ensureing that electric power safety plays a role.Owing to additionally using pressure sensor, temperature sensor in the present invention, pressure and temperature signal is gathered by pressure sensor, temperature sensor, density value 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 be converted to current signal, realize long-distance transmissions, and then realize the density of on-line monitoring sulfur hexafluoride gas electric equipment.
In addition the present invention also tool have the following advantages: in gas density relay of the present invention, the displacement of Bourdon tube and temperature-compensating sheet is reduced mechanism through displacement and this displacement is reduced, remove control signal generator (some microswitches) again, reach 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, 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 a kind of telemetering type sulfur hexafluoride gas density relay, 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 the temperature sensor 20 on pedestal 5 (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 is connected with electric current galvanostat with voltage current adapter by amplifying circuit, single-chip microcomputer 23, digital analog converter successively with the output of pressure sensor 21, thus after converting the pressure and temperature signal collected to density value, converting the output of 4-20mA current signal again to, output signal is connected with junction block 15.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 a kind of telemetering type sulfur hexafluoride gas density relay, 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 relay are as follows: by the measurement of pressure sensor 21, temperature sensor 20 pairs of pressure and temperatures, through amplifying circuit, the signal of the pressure and temperature measured is amplified, the signal of the pressure and temperature of this amplification, through the collection of single-chip microcomputer, obtains sulfur hexafluoride gas density P through single-chip microcomputer internal calculation
20, this sulfur hexafluoride gas density P
20conversion through digital analog converter makes it the P converting voltage signal to
20U, then again through the conversion of voltage current adapter, make the P of voltage signal
20Uconvert the P of current signal to
20I, then through the effect of overcurrent galvanostat, make the sulfur hexafluoride gas density P of current signal
20Ican long-distance transmissions, and then realize the density 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, pressure and temperature signal is gathered by pressure sensor 21, temperature sensor 20, density value is converted to through single-chip microcomputer 23 process, after digital analog converter, voltage current adapter and the process of electric current galvanostat, sulfur hexafluoride gas density value can be converted to current signal (4 ~ 20mA), realize long-distance transmissions, and then realize the density 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. a telemetering type sulfur hexafluoride gas density relay, 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. a kind of telemetering type sulfur hexafluoride gas density relay as claimed in claim 1, is characterized in that: wherein Bourdon tube adopts C type Bourdon tube, and connector adopts connecting rod.
3. a kind of telemetering type sulfur hexafluoride gas density relay as claimed in claim 1, is characterized in that: its center tap (9) is communicated with pressure sensor (21) with the temperature sensor (20) on pedestal (5) by pipeline.
4. a kind of telemetering type sulfur hexafluoride gas density relay as claimed in claim 3, it is characterized in that: wherein temperature sensor (20) is connected with electric current galvanostat by amplifying circuit, single-chip microcomputer (23), digital analog converter, voltage current adapter successively with the output of pressure sensor (21), 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 and temperature signal collected to density value again to;
Or wherein temperature sensor (20) is connected with junction block (15) respectively with the output of pressure sensor (21), thus is directly exported by the pressure and temperature signal collected.
5. a kind of telemetering type sulfur hexafluoride gas density relay 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 a kind of telemetering type sulfur hexafluoride gas density relay 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. a kind of telemetering type sulfur hexafluoride gas density relay 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. a kind of telemetering type sulfur hexafluoride gas density relay 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. a kind of telemetering type sulfur hexafluoride gas density relay 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).
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| CN201410601680.2A CN104282485A (en) | 2014-10-31 | 2014-10-31 | Remote-transmission sulfur hexafluoride gas density relay |
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| CN201410601680.2A CN104282485A (en) | 2014-10-31 | 2014-10-31 | Remote-transmission sulfur hexafluoride gas density relay |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681351A (en) * | 2015-02-05 | 2015-06-03 | 上海上芃电气有限公司 | Convenient-to-read high-accuracy sulfur hexafluoride gas density relay |
| CN105609368A (en) * | 2015-11-26 | 2016-05-25 | 上海乐研电气科技有限公司 | Gas density relay with gas density level indicator |
| CN110416023A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of gas density relay and its implementation of fast and easy verification |
| US20210043402A1 (en) * | 2018-09-28 | 2021-02-11 | Shanghai Roye Electrical Co., Ltd. | Method for improving gas density relay precision and a high-precision gas density relay |
| WO2021043036A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Field detection device, system and method for achieving no maintenance of gas density relay |
| 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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