CN101231918A - Antivibration type SF6 gas density relay - Google Patents
Antivibration type SF6 gas density relay Download PDFInfo
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- CN101231918A CN101231918A CNA2008100334882A CN200810033488A CN101231918A CN 101231918 A CN101231918 A CN 101231918A CN A2008100334882 A CNA2008100334882 A CN A2008100334882A CN 200810033488 A CN200810033488 A CN 200810033488A CN 101231918 A CN101231918 A CN 101231918A
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- sensitive switch
- gas density
- adjusting rod
- density relay
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Abstract
The invention relates to an antivibration SF6 gas density relay, which comprises an SF6 gas density relay encloser, a pedestal arranged in the encloser, a core, a beam, a temperature compensation disk, at least a regulating lever fixed on the beam, a plurality of pairs of inching switches arranged corresponding to the regulating lever, and operation arms arranged on the inching switches. The invention is characterized in that the length of the operation arms on the inching switches ranges from 21mm to 50mm; the inching switches and the pedestal are arranged on both sides of the beam, respectively; the inching switches are arranged above the regulating lever corresponding to the inching switches, respectively; the operation arms on the inching switches can contact the corresponding regulating lever. As the technical proposal is adopted, the SF6 gas density relay provided by the invention does not need filling oil with high vibration resistance and significantly improved reliability and precision.
Description
Technical field
The present invention relates to the SF6 gas density relay on a kind of SF6 of being applied in (sulphur hexafluoride) electric equipment, relate in particular to a kind of antivibration type SF 6 gas density relay.
Background technology
The SF6 electric product has been widely used in power department, industrial and mining enterprises, has promoted the fast development of power industry.The arc-extinguishing medium of SF6 electric product and dielectric are SF6 gas, can not leak gas.If leak gas, just can not guarantee the reliable and secure operation of SF6 electric product.So the SF6 density value of monitoring SF6 electric product is very necessary.
At present generally adopt a kind of pointer SF6 gas density relay of machinery to monitor SF6 density, promptly this relay can be reported to the police and locking when gas leakage takes place the SF6 electric product, can also show on-the-spot density value simultaneously.This density monitor generally adopts single temperature-compensating sheet and hairspring type electric contact, help formula suction though increased magnetic, the reliable closure of docking point is helpful, but the difference of density value when also causing actual act and pointer show value, in addition when density is higher than set point, its movable contact is to move along with pointer, because the power of hairspring is very little, make magnetic help formula suction can not transfer too greatly, in case when density value had arrived setting operating value (report to the police or locking), signalling contact (reporting to the police or locking) had moved, if pointer in its vicinity at this moment, can produce vibration, signal is disconnected again, send misoperation.In addition, when contact (reporting to the police or locking) was closed, its closing force only depends on the small power of the hairspring of contact, helps formula power even add magnetic, and was also still very little, therefore extremely was afraid of to shake.In order to improve its vibration resistance, generally all be filled with silicone oil, but because on making, ubiquity leakage of oil problem.In case leakage of oil, the user has only replacing again, causes economic loss.
Existing a kind of contact of developing adopts the no oil type SF6 gas density relay of sensitive switch, the structure of this SF6 gas density relay as shown in Figure 1 and Figure 2, it comprises SF6 gas connection 1, movement 2, watchcase 3, dial 4, pointer 5, Bourdon tube 6, temperature-compensating sheet 7, junction block 8, sensitive switch 91,92,93, printed circuit board 10, location-plate 11, fixed head 12, electric wire 13, adjusting rod 141,142,143, connecting rod 15, crossbeam 16, watch crystal 17, cover circle 18, pedestal 19 and SF6 air shooter 20.Wherein, SF6 gas connection 1, junction block 8, watch crystal 17, cover circle 18 and pedestal 19 are separately fixed on the watchcase 3.Movement 2 and fixed head 12 are installed in respectively on the pedestal 19, and pointer 5 and dial 4 are separately fixed on the movement 2.One end of Bourdon tube 6 is welded on the pedestal 19 and is communicated with it, the other end is connected with an end of temperature-compensating sheet 7 by the end seat, the other end of temperature-compensating sheet 7 is connected with crossbeam 16, and an end of crossbeam 16 is connected with an end of connecting rod 15, and the other end of connecting rod 15 is connected with movement 2.Be fixed with adjusting rod 141,142,143 on the crossbeam 16. Sensitive switch 91,92,93 is welded on respectively on the printed circuit board 10, and printed circuit board 10 is installed on the fixed head 12, and fixed head 12 is installed in again on the pedestal 19.Sensitive switch 91 is fixed on the below of adjusting rod 141, and sensitive switch 92 is fixed on the below of adjusting rod 142, and sensitive switch 93 is fixed on the below of adjusting rod 143.Be respectively equipped with motion arm 911,921,931 on each sensitive switch.Location-plate 11 is fixed on the movement 2; its front end extends to the below of the end seat of the end that Bourdon tube 6 links to each other with temperature-compensating sheet 7; its function is: when the SF6 gas density drops to certain value; spacing Bourdon tube 6 moves down; the protection sensitive switch; and then protection crossbeam 16 do not damaged by pressure and is out of shape, and makes whole system keep reliably working.The contact of sensitive switch by electric wire 13, is connected on the junction block 8 from printed circuit board 10, and junction block 8 is fixed on the watchcase 3.Watch crystal 17, cover circle 18 are separately fixed on the watchcase 3, can protect its internal mechanism to avoid mechanical damage and dirt, rainwater are invaded.One end of SF6 air shooter 20 is connected with pedestal 19, and positiver sealing, and the other end of SF6 air shooter 20 is connected with gas connection 1, and positiver sealing.
Though the sensitive switch that the pointer SF6 gas density relay of existing above-mentioned nothing oil is adopted has certain advantage, because its structure is unreasonable, in use has following problem:
1, because each sensitive switch in this SF6 gas density relay is installed in the below of each adjusting rod respectively, even be datum line with the crossbeam, sensitive switch is in a side of crossbeam, and pedestal is also in the same side of this crossbeam.In SF6 density just often, to the motion arm application of force, motion arm is not in free state to adjusting rod, at this moment, when the judder of switch breaking-closing operating, because the motion arm swing also is easy to cause the output of malfunction signal, can not guarantee system's reliably working.
2, because less than 19mm, there is following problem in the length that this SF6 gas density relay is arranged on the motion arm on each sensitive switch:
First, the impulse stroke of the motion arm of sensitive switch is little, sensitive switch is fixed on the below of adjusting rod again, when non operating state, in temperature high season, the temperature-compensating sector-meeting opens, adjusting rod makes motion arm be in the compacting state, at this moment to the motion arm application of force like this, when vibration, be easy to cause motion arm to damage, can not guarantee system's reliably working, compensating plate also can be subjected to the bounce effect for a long time and be out of shape simultaneously, make the precision of relay adversely effected, and can not guarantee system's reliably working.
Second; the impulse stroke of the motion arm of sensitive switch is little; add because sensitive switch designs again below adjusting rod, for when not using, simultaneously again in the high place of temperature; in order to protect sensitive switch, protection crossbeam not to be damaged by pressure and to be out of shape; in order to keep the reliably working of whole system, just must be limited in Bourdon tube in certain scope simultaneously, and existing indication range can not be accomplished-0.1MPa; this can not show vacuum values to the inconvenience that the user brings use when vacuumizing as tonifying Qi.
The 3rd, the impulse stroke of the motion arm of sensitive switch is little, the working range of this relay (being the scope between initial value ~ maximum) little (only less than 0.5Mpa).
The 4th, the impulse stroke of the motion arm of sensitive switch is little, elements such as adjusting rod or compensating plate change slightly, will have a strong impact on the precision of density monitor.Simultaneously when debugging, also be difficult to precision transfer very accurate, promptly be difficult to make high-precision density monitor.
In sum, be necessary to develop and a kind ofly do not want oil-filled and the good pointer SF6 gas density relay of resistance to shock, to guarantee system's reliably working.
Summary of the invention
The precision that the objective of the invention is to solve the relay that the impulse stroke of motion arm of the sensitive switch of existing no oil type pointer-type SF6 gas density relay existence causes for a short time is not enough, indication range below not wide and that be installed in adjusting rod because of sensitive switch is caused the problem of malfunction signal output easily, provide a kind of do not need oil-filled, resistance to shock is good, reliability and precision significantly improve antivibration type SF 6 gas density relay, be used for controlling and monitoring the density of airtight container SF6 gas, and at the gas leakage situation that occurs in the SF6 electric equipment, in time send alarm signal and block signal, for ensureing that electric power safety plays effect.
Realize that the object of the invention technical scheme is: a kind of antivibration type SF 6 gas density relay, comprise SF6 gas density relay housing, be arranged on the pedestal in this housing, movement, crossbeam, the temperature-compensating sheet, at least one is fixed on the adjusting rod on the crossbeam, sensitive switch with each adjusting rod corresponding pairs setting, and the motion arm that on each sensitive switch, is respectively equipped with, wherein, motion arm length on described each sensitive switch is 21mm-50mm, and: described each sensitive switch and pedestal lay respectively at the both sides of crossbeam, each sensitive switch lays respectively at the top of adjusting rod corresponding with it, and the motion arm on each sensitive switch contacts with corresponding adjusting rod.
Alternatively, described sensitive switch and adjusting rod corresponding with it are 1 pair, 2 pairs, 3 pairs or 4 pairs.
Owing to adopted above-mentioned technical solution, antivibration type SF 6 gas density relay of the present invention compared with prior art has following tangible advantage and characteristics:
1, because sensitive switch is designed above adjusting rod.In SF6 density just often, the motion arm of sensitive switch is in stress, at this moment, when the judder of switch breaking-closing operating, can not cause the output of malfunction signal, can guarantee system's reliably working.When SF6 gas pressure (density) descends, or when not inflating (when not using), adjusting rod just can not run into sensitive switch, and then just can not cause deterioration in accuracy.
2, because the length that this SF6 gas density relay is arranged on the motion arm on each sensitive switch is 21 ~ 50mm, the impulse stroke of the motion arm of sensitive switch is big, add because sensitive switch designs again above adjusting rod, the below of adjusting rod also stops without any thing like this, indication range is accomplished-0.1MPa, this brings the convenience of use to the user, just can show its vacuum values when vacuumizing as tonifying Qi.
3, because the length that this SF6 gas density relay is arranged on the motion arm on each sensitive switch is 21 ~ 50mm, the impulse stroke of the motion arm of sensitive switch is big, so the working range of this relay is big, can accomplish 1.0MPa.
4, because the length that this SF6 gas density relay is arranged on the motion arm on each sensitive switch is 21 ~ 50mm, the impulse stroke of the motion arm of sensitive switch is big, element such as adjusting rod or compensating plate changes slightly, just can muchly not influence the precision of density monitor.Simultaneously when debugging, also be easy to precision transfer very accurate, be easy to make high-precision density monitor.
Description of drawings
Fig. 1 is the structural representation of existing pointer SF6 gas density relay;
Fig. 2 is the partial side view of the existing pointer SF6 gas density relay of Fig. 1;
Fig. 3 is the structural representation of antivibration type SF 6 gas density relay of the present invention;
Fig. 4 is the partial side view of Fig. 3 antivibration type SF 6 gas density relay of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and embodiments.
Referring to Fig. 3～4, antivibration type SF 6 gas density relay of the present invention mainly is made up of gas connection 1, movement 2, watchcase 3, dial 4, pointer 5, Bourdon tube 6, wide temperature-compensating sheet 7 ' (width 5.5-18mm), junction block 8, three sensitive switches 91,92,93, printed circuit board 10, location-plate 11, fixed head 12, electric wire 13, three adjusting rods 141,142,143, connecting rod 15, crossbeam 16, watch crystal 17,18, two baffle plates 21,22 of cover circle, pedestal 19, gas inlet pipe 20, sensitive switch reinforcing mechanisms 23, end seat 24 etc.Wherein, gas connection 1 is fixed on the watchcase 3, and movement 2 is fixed on the pedestal 19.One end of Bourdon tube 6 is welded on the pedestal 19 and is communicated with it, and the other end is connected with an end of wide temperature-compensating sheet 7 ' by end 24, and the other end of wide temperature-compensating sheet 7 ' is connected with crossbeam 16.Be fixed with three adjusting rods 141,142,143 on the crossbeam 16.Crossbeam 16 is connected with connecting rod 15 again, and connecting rod 15 is connected with movement 2 again.Three sensitive switches 91,92,93 are separately fixed on the printed circuit board 10, printed circuit board 10 is fixed on the fixed head 12, fixed head 12 is installed in again on the pedestal 19, and three sensitive switches 91,92,93 correspondences are arranged on each adjusting rod 141,142,143 top, wherein, sensitive switch 91 is fixed on the top of adjusting rod 141, sensitive switch 92 is fixed on the top of adjusting rod 142, sensitive switch 93 is fixed on the top of adjusting rod 143, each sensitive switch lower end is connected with motion arm 911 ' respectively, 921 ', 931 ' (effective width of the front end of each motion arm and adjusting rod contact site is 4.4-18mm, and motion arm length (being its length beyond the sensitive switch housing) is 21-50mm).Location-plate 11 is fixed on the movement 2, and pointer 5 and dial 4 are separately fixed on the movement 2.The contact of sensitive switch by electric wire 13, is connected on the junction block 8 from printed circuit board 10, and junction block 8 is fixed on the watchcase 3.Watch crystal 17, cover circle 18 are separately fixed on the watchcase 3, can protect its internal mechanism to avoid mechanical damage and dirt, rainwater are invaded.One end of gas inlet pipe 20 is connected with pedestal 19, and positiver sealing; The other end of gas inlet pipe 20 is connected with gas connection 1, and positiver sealing.One end of baffle plate 21 is fixed on the pedestal 19 (or movement or support or watchcase), and the other end extends upward the end of retaining at crossbeam 16, but and leave the gap between the crossbeam 16; One end of baffle plate 22 also is fixed on the pedestal 19, and the other end also extends upward the other end of retaining at crossbeam 16, but and also leaves the gap between the crossbeam 16.The effect of baffle plate 21 and baffle plate 22 is, when the switch divide-shut brake produces vibration, prevent that crossbeam 16 from axially producing undue displacement along it, even crossbeam 16 axially is subjected to displacement along it, also can be fixed in the controllable scope at one by baffle plate 21 and 22 retainings, prevent that adjusting rod 141,142,143 from blocking or breaking away from the phenomenon of sensitive switch 91,92,93, guarantee system's reliably working.
The action principle of antivibration type SF 6 gas density relay of the present invention is based on flexible member Bourdon tube 6, utilizes wide temperature-compensating sheet 7 ' that the pressure and temperature that changes is revised, the variation of reaction SF6 gas density.Promptly under the pressure effect of measured medium SF6 gas, because the effect of wide temperature-compensating sheet 7 ' has been arranged, the variation of its density value, force value also changes accordingly, force the end of Bourdon tube 6 to produce corresponding strain one displacement,, pass to movement 2 by means of wide temperature-compensating sheet 7 ' and connecting rod 15, movement 2 passes to pointer 5 again, then tested SF6 gas density value is indicated on dial 4.If leaked gas, its density value drops to a certain degree (reach and report to the police or the locking value), Bourdon tube 6 produces accordingly to bottom offset, by wide temperature-compensating sheet 7 ', make crossbeam 16 to bottom offset, adjusting rod 141,142,143 on the crossbeam 16 is just gradually from corresponding sensitive switch 91,92,93, when arriving to a certain degree, corresponding sensitive switch 91,92,93 contacts are just connected, send corresponding signal (reporting to the police or locking), reach the SF6 gas density in the equipment such as supervision and control electric switch, make the electric equipment trouble free service.If its density value has raise, force value also raises accordingly, be elevated to a certain degree, Bourdon tube 6 also produces accordingly to top offset, by wide temperature-compensating sheet 7 ', makes crossbeam 16 to top offset, adjusting rod 141,142,143 on the crossbeam 16 is just to top offset, just promote corresponding sensitive switch 91,92,93, its contact just disconnects, and signal (reporting to the police or locking) is just removed.
Above-mentioned sensitive switch and adjusting rod corresponding with it can have 1 pair, 2 pairs, 3 pairs or 4 pairs, even how right, and the foregoing description is 3 pairs.
Antivibration type SF 6 gas density relay of the present invention is because the length of the motion arm that extended, sensitive switch 91,92,93 is designed above adjusting rod 141,142,143, through handling like this, just have extraordinary performance, reach: A, can accomplish that contact actual act value is very consistent with the pointer show value; B, when SF6 gas pressure (density) descends, or when not inflating (when not using), adjusting rod also can not be run into the bottom of sensitive switch, and the below of adjusting rod also stops without any thing, so just can not cause the distortion of temperature-compensating sheet and crossbeam, and then just can not cause deterioration in accuracy; C, just indication range is accomplished-0.1MPa, this brings the convenience of use to the user, just can show its vacuum values when vacuumizing as tonifying Qi; The working range of D, this relay is big, can accomplish 1.0MPa; E, simultaneously when debugging, also be easy to precision transfer very accurate, be easy to make high-precision density monitor; H, simultaneously its stability is also better.So just having improved the resistance to shock and the precision property of this SF6 gas density relay greatly, is a kind of genuine vibration resistance SF6 gas density relay.Have the advantage of not being afraid of vibration, can not fill silicone oil, overcome the leakage of oil problem fully, can be applied in well on the SF6 electric equipment.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique, under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (2)
1. antivibration type SF 6 gas density relay, comprise SF6 gas density relay housing, be arranged on the pedestal in this housing, movement, crossbeam, the temperature-compensating sheet, at least one is fixed on the adjusting rod on the crossbeam, sensitive switch with each adjusting rod corresponding pairs setting, and the motion arm that on each sensitive switch, is respectively equipped with, it is characterized in that, motion arm length on described each sensitive switch is 21mm-50mm, and: described each sensitive switch and pedestal lay respectively at the both sides of crossbeam, and each sensitive switch lays respectively at the top of adjusting rod corresponding with it, and the motion arm on each sensitive switch can contact with corresponding adjusting rod.
2. antivibration type SF 6 gas density relay as claimed in claim 1 is characterized in that, described sensitive switch and adjusting rod corresponding with it are 1 pair, 2 pairs, 3 pairs or 4 pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100334882A CN101231918A (en) | 2008-02-03 | 2008-02-03 | Antivibration type SF6 gas density relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100334882A CN101231918A (en) | 2008-02-03 | 2008-02-03 | Antivibration type SF6 gas density relay |
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| CN101231918A true CN101231918A (en) | 2008-07-30 |
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| CNA2008100334882A Pending CN101231918A (en) | 2008-02-03 | 2008-02-03 | Antivibration type SF6 gas density relay |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013357A (en) * | 2009-09-04 | 2011-04-13 | 上海乐研电气科技有限公司 | Sulfur hexafluoride gas density relay |
| CN110411893A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of gas density monitor and system with contact point signal output |
| CN110530758A (en) * | 2019-09-04 | 2019-12-03 | 上海乐研电气有限公司 | A kind of gas density relay and its method of calibration with online self checking function |
| CN111952105A (en) * | 2020-07-07 | 2020-11-17 | 国家电网有限公司 | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay |
-
2008
- 2008-02-03 CN CNA2008100334882A patent/CN101231918A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013357A (en) * | 2009-09-04 | 2011-04-13 | 上海乐研电气科技有限公司 | Sulfur hexafluoride gas density relay |
| CN110411893A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of gas density monitor and system with contact point signal output |
| CN110530758A (en) * | 2019-09-04 | 2019-12-03 | 上海乐研电气有限公司 | A kind of gas density relay and its method of calibration with online self checking function |
| CN111952105A (en) * | 2020-07-07 | 2020-11-17 | 国家电网有限公司 | Full-range high-precision remote transmission type sulfur hexafluoride gas density relay |
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Application publication date: 20080730 |