CN101615526A - The pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made - Google Patents
The pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made Download PDFInfo
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- CN101615526A CN101615526A CN200810039682A CN200810039682A CN101615526A CN 101615526 A CN101615526 A CN 101615526A CN 200810039682 A CN200810039682 A CN 200810039682A CN 200810039682 A CN200810039682 A CN 200810039682A CN 101615526 A CN101615526 A CN 101615526A
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Abstract
The invention provides the pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made, method comprises that the pressure limit that described Bourdon tube carries and the rated operating pressure of described density monitor are complementary, that is: when rated operating pressure≤0.40MPa, the pressure limit of Bourdon tube is 〉=0.29MPa; When rated operating pressure＞0.40MPa, the pressure limit of Bourdon tube is 〉=0.47MPa.The present invention has increased the pressure limit of Bourdon tube, makes density monitor, can avoid causing temperature-compensating sheet and pointer distortion at high temperature season not during user mode at no gas, guarantees system's long-term stable operation.Precision, the stability of product all are greatly improved.In addition, after the pressure limit of Bourdon tube increased, the working range of relay had also increased accordingly.
Description
Technical field
The present invention relates to a kind of relay, relate in particular to a kind of SF of being applied in
6The pressure limit system of selection that gas density relay on (sulphur hexafluoride) electric equipment and Bourdon tube thereof are made.
Background technology
SF
6Electric product has been widely used in power department, and industrial and mining enterprises have promoted the fast development of power industry.Guarantee SF
6The reliable and secure operation of electric product has become one of vital task of power department.SF
6The arc-extinguishing medium of electric product and dielectric are SF
6Gas can not leak gas, if leak gas, just can not guarantee SF
6The reliable and secure operation of electric product.So monitoring SF
6The SF of electric product
6Density value is very necessary.Be used for monitoring SF now
6Density generally adopts a kind of pointer density monitor of machinery, has the SF of working as
6Can report to the police and blocking function when gas leakage takes place electric product, also have the performance of on-the-spot display density value.The density monitor contact that uses mainly adopts electric contact type and sensitive switch type at present, and electric contact type density monitor generally will fill the silicone oil that vibrationproof is used, so regular meeting's generation oil leakage phenomenon, brings loss to the user.The problem that the no oil type density monitor of sensitive switch type exists is: because this SF
6Gas density relay is arranged on the length of the motion arm on each sensitive switch less than 19mm, and the impulse stroke of the motion arm of sensitive switch is little, and the pressure limit of Bourdon tube is also little, and its pipe end displacement is just big under the uniform pressure situation like this.At present for the density monitor of rated operating pressure (relative pressure, in full with)≤0.40Mpa, employing be the Bourdon tube of pressure limit (relative pressure, in full with)≤0.28Mpa; For the density monitor of rated operating pressure＞0.40Mpa, employing be the Bourdon tube of pressure limit≤0.46Mpa.So, because the impulse stroke of the motion arm of used sensitive switch is little, do not match with the pressure limit of used Bourdon tube.When non operating state, in high season, temperature-compensating sector-meeting spreading comes in temperature, and adjusting rod just is pressed onto the bottom to the sensitive switch motion arm, makes the sensitive switch motion arm be in pressured state.At this moment, when vibration, be easy to cause the sensitive switch motion arm to damage, can not guarantee system's reliably working.Because the sensitive switch motion arm is forced into the bottom, there is not the place movable, promptly inactive, will make compensating plate be subjected to the bounce effect for a long time, and make the compensating plate distortion, can make the precision of relay adversely effected, and can not guarantee system's reliably working.
In sum, the SF of prior art
6The pressure limit of the Bourdon tube of gas density relay is little, can not satisfy the need of work of high temperature season.So it is good to develop a kind of performance, its resistance to shock is good especially, the pointer SF of good stability
6Gas density relay is very important.
The pressure limit of Bourdon tube is like this definition: when the gearratio of the movement of density monitor is 12, connecting rod two hole centre-to-centre spacing are 22mm, connecting rod one end is connected the centre in the long waist shaped hole of this movement sector gear, and under no atmospheric pressure state, pointer just in time refers in 0 angle; Make pointer walk about 270 degree clockwise during angles when applying a pressure, claim that then this pressure is the pressure limit of Bourdon tube.For example: when applying pressure to 0.30Mpa, pointer just in time walk about clockwise 270 the degree angles, the pressure limit that then claims this Bourdon tube is 0.30Mpa.
Explanation in addition: in full pressure is relative pressure, if represent with absolute pressure, and absolute pressure=relative pressure+0.10Mpa then.
Summary of the invention
Purpose of the present invention is to solve the problems referred to above that prior art exists, and the pressure limit system of selection that provides a kind of gas density relay and Bourdon tube thereof to make is used for control and monitors airtight container SF
6The density of gas is at SF
6The gas leakage situation that occurs in the electric equipment is in time sent alarm signal, and block signal is to ensure electric power safety.
The object of the present invention is achieved like this: a kind of gas density relay, comprise housing and be arranged on the interior pedestal of housing, movement, pointer, Bourdon tube, the temperature-compensating sheet, crossbeam, connecting rod, the adjusting rod of one or more corresponding settings separately and sensitive switch, one end of described Bourdon tube is welded on the pedestal and is communicated with it, the other end is connected with an end of temperature-compensating sheet by the end seat, it is characterized in that: the pressure limit that described Bourdon tube carried and the rated operating pressure of described density monitor are complementary, that is: when rated operating pressure≤0.40Mpa, the pressure limit of Bourdon tube is 〉=0.29Mpa; When rated operating pressure＞0.40Mpa, the pressure limit of Bourdon tube is 〉=0.47Mpa.
In above-mentioned gas density relay, when rated operating pressure=0.40Mpa, the pressure limit of Bourdon tube is set at 0.30Mpa～0.45Mpa.
In above-mentioned gas density relay, when rated operating pressure=0.30Mpa, the pressure limit of Bourdon tube is set at 0.29Mpa～0.35Mpa.
In above-mentioned gas density relay, when rated operating pressure=0.60Mpa, the pressure limit of Bourdon tube is set at 0.48Mpa～0.75Mpa.
In above-mentioned gas density relay, when rated operating pressure=0.50Mpa, the pressure limit of Bourdon tube is set at 0.47Mpa～0.55Mpa.
In above-mentioned gas density relay, described sensitive switch and adjusting rod corresponding with it are 1 pair, 2 pairs, 3 pairs or 4 pairs.
The pressure limit system of selection that a kind of Bourdon tube of gas density relay is made may further comprise the steps:
The pressure limit that described Bourdon tube carried and the rated operating pressure of described density monitor are complementary, that is: when rated operating pressure≤0.40Mpa, the pressure limit of Bourdon tube is 〉=0.29Mpa; When rated operating pressure＞0.40Mpa, the pressure limit of Bourdon tube is 〉=0.47Mpa;
When rated operating pressure=0.40Mpa, the pressure limit of Bourdon tube is 0.30Mpa～0.45Mpa;
When rated operating pressure=0.30Mpa, the pressure limit of Bourdon tube is 0.29Mpa～0.35Mpa;
When rated operating pressure=0.60Mpa, the pressure limit of Bourdon tube is 0.48Mpa～0.75Mpa;
When rated operating pressure=0.50Mpa, the pressure limit of Bourdon tube is 0.47Mpa～0.55Mpa.
The pressure limit system of selection that a kind of gas density relay of the present invention and Bourdon tube thereof are made, owing to increased the pressure limit of Bourdon tube, its pipe end displacement is just little under the uniform pressure situation like this, just sensitive switch that can be little with the motion arm impulse stroke (length of its motion arm is less than 19mm) is complementary, like this when non operating state, in temperature high season, adjusting rod just can not be pressed onto the bottom to the sensitive switch motion arm, adjusting rod just can not be urged to the motion arm of sensitive switch like this, when vibration, just be not easy to cause the sensitive switch motion arm to damage, can guarantee system's reliably working.The most important thing is because the sensitive switch motion arm can not be forced into the bottom, also have local movable, promptly can also free movement, so just can not make compensating plate be subjected to the bounce effect for a long time, and can not make the compensating plate distortion, and can not make the precision of relay adversely effected yet, can guarantee system's reliably working.Precision, the stability of product all are greatly improved.In addition, the pressure limit of Bourdon tube for example accomplishes that greater than 0.50Mpa the working range of relay is also corresponding have been increased after increasing.
Description of drawings
Fig. 1 is the structural representation of a kind of gas density relay of the present invention;
Fig. 2 is the partial side view of structure shown in Figure 1;
Fig. 3 is the partial enlarged drawing of Fig. 1.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3.The sensitive switch in this implementation example and the quantity of adjusting rod respectively are 3.Gas density relay of the present invention comprises SF
6Gas connection 1, movement 2, housing 3, dial 4, pointer 5, Bourdon tube 6, temperature-compensating sheet 7, terminal box 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 SF
6Air shooter 20, end seat 21.Wherein, SF
6Gas connection 1, terminal box 8, watch crystal 17, cover circle 18 and pedestal 19 are separately fixed on the housing 3.Movement 2 is fixed 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, and the other end is connected with an end of temperature-compensating sheet 7 by end seat 21, and Bourdon tube 6 pressure limit of being carried and the rated operating pressure of density monitor are complementary.The other end of temperature-compensating sheet 7 is connected with crossbeam 16, and crossbeam 16 is connected with connecting rod 15 again, and 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, and its front end extends to the below of the end seat 21 of the end that Bourdon tube 6 links to each other with temperature-compensating sheet 7, and its function is: work as SF
6When gas density dropped to certain value, spacing Bourdon tube 6 moved 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 terminal box 8 from printed circuit board 10, and terminal box 8 is fixed on the housing 3.Watch crystal 17, cover circle 18 are separately fixed on the housing 3, can protect its internal mechanism to avoid mechanical damage and dirt, rainwater are invaded.SF
6One end of air shooter 20 is connected with pedestal 19, and positiver sealing, SF
6The other end of air shooter 20 is connected with joint 1, and positiver sealing.
The pressure limit system of selection that the Bourdon tube of gas density relay of the present invention is made, may further comprise the steps: the pressure limit that Bourdon tube carried and the rated operating pressure of its density monitor are complementary, promptly when the manufacturing Bourdon tube of design, set the pressure limit of Bourdon tube earlier according to the rated operating pressure of density monitor, pressure limit according to Bourdon tube requires to make Bourdon tube again, concrete grammar is: when rated operating pressure≤0.40Mpa, the pressure limit of Bourdon tube is set at 〉=0.29Mpa; When rated operating pressure＞0.40Mpa, the pressure limit of Bourdon tube is set at 〉=0.47Mpa; When rated operating pressure=0.40Mpa, the pressure limit of Bourdon tube is set at 0.30Mpa～0.45Mpa; When rated operating pressure=0.30Mpa, the pressure limit of Bourdon tube is set at 0.29Mpa～0.35Mpa; When rated operating pressure=0.60Mpa, the pressure limit of Bourdon tube is set at 0.48Mpa～0.75Mpa; When rated operating pressure=0.50Mpa, the pressure limit of Bourdon tube is set at 0.47Mpa～0.55Mpa.Owing to increased the pressure limit of Bourdon tube, its pipe end displacement is just little under the uniform pressure situation like this, just sensitive switch that can be little with the motion arm impulse stroke (length of its motion arm is less than 19mm) is complementary, like this when non operating state, in temperature high season, adjusting rod just can not be pressed onto the bottom to the sensitive switch motion arm, adjusting rod just can not produce pressure to the sensitive switch motion arm like this, when vibration, just be not easy to cause the sensitive switch motion arm to damage, can guarantee system's reliably working.The most important thing is, to also have local movable because the sensitive switch motion arm can not be forced into the bottom, promptly can also free movement, so just can not make compensating plate be subjected to the bounce effect for a long time, and can not make the compensating plate distortion, can not make the precision of relay adversely effected yet, can guarantee system's reliably working.Make the precision of product simultaneously, stability all is greatly improved.The working range of these relays is also big simultaneously, can accomplish greater than 0.50Mpa.
The action principle of gas density relay of the present invention is based on flexible member Bourdon tube 6, utilizes the pressure and temperature of 7 pairs of variations of temperature-compensating sheet to revise, the SF in the reaction airtight container
6The variation of gas density.Promptly at measured medium SF
6Under the pressure effect of gas, because the effect of 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-displacement,, pass to movement 2 by means of temperature-compensating sheet 7 and connecting rod 15, movement 2 passes to pointer 5 again, satisfies tested SF
6The gas density value indicates on dial 4.Density monitor just can be SF like this
6Density value has shown.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 temperature-compensating sheet 7, make crossbeam 16 to bottom offset, adjusting rod 141,142,143 on the crossbeam 16 just promotes corresponding sensitive switch 91,92,93 contacts and connects, and sends corresponding signal (reporting to the police or locking), reaches the SF in the equipment such as supervision and control electric switch
6Gas density makes 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 temperature-compensating sheet 7, makes crossbeam 16 to top offset, adjusting rod 141,142,143 on the crossbeam 16 is just to top offset, adjusting rod 141,142,143 is just away from sensitive switch 91,92,93, and its contact just disconnects, and signal (reporting to the police or locking) is just removed.So just finish the function of density monitor.
Because this gas density relay has increased the pressure limit of Bourdon tube, though the sensitive switch that its motion arm impulse stroke is little can be constant, but because the pressure limit of Bourdon tube increases, the displacement of Bourdon tube is just little under same pressure, and just sensitive switch that can be little with the motion arm impulse stroke (length of its motion arm is less than 19mm) is complementary.Work as SF
6When gas pressure (density) descends, or when not inflating (when not using), adjusting rod just is difficult for running into sensitive switch, so just can not cause the distortion of temperature-compensating sheet and crossbeam, and then just can not cause deterioration in accuracy.Because the signal contact of gas density relay of the present invention adopts the sensitive switch form, moreover the control of sensitive switch contact is all controlled by adjusting rod, and the control of adjusting rod is carried out by compensating plate 7 and Bourdon tube 6, compensating plate 7 generally is not afraid of vibration, and it only changes with variation of temperature, and the power of Bourdon tube is bigger, resistance to shock is better, be difficult for being out of shape or producing displacement, can guarantee system's reliably working, improved the resistance to shock of this product greatly because of vibration.
In addition, SF
6After the density value of gas descended, Bourdon tube 6 just moved down, and until the action of signal (reporting to the police or locking) contact, promptly the sensitive switch contact is connected.Density value descends more, and it is firm more that sensitive switch is just connected, and descends again, Bourdon tube 6 plate 11 that just is positioned is positioned on its scale value, and at this moment, Bourdon tube 6 is used on the sensitive switch with bigger masterpiece, sensitive switch is under the good pressure and in the good connection, is not afraid of vibration.The sensitive switch motion arm is not conditioned bar and is pressed onto the end simultaneously, so just can not cause the distortion of temperature-compensating sheet and crossbeam, and then just can not cause deterioration in accuracy, is the good density monitor of a kind of stability.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.Also can be fixed on the top (being other direction) of adjusting rod as sensitive switch.
Claims (7)
1. gas density relay, comprise housing and be arranged on the interior pedestal of housing, movement, pointer, Bourdon tube, the temperature-compensating sheet, crossbeam, connecting rod, the adjusting rod of one or more corresponding settings separately and sensitive switch, one end of described Bourdon tube is welded on the pedestal and is communicated with it, the other end is connected with an end of temperature-compensating sheet by the end seat, it is characterized in that: the pressure limit that described Bourdon tube carried and the rated operating pressure of described density monitor are complementary, that is: when rated operating pressure≤0.40Mpa, the pressure limit of Bourdon tube is 〉=0.29Mpa; When rated operating pressure＞0.40Mpa, the pressure limit of Bourdon tube is 〉=0.47Mpa.
2. gas density relay as claimed in claim 1 is characterized in that: when rated operating pressure=0.40Mpa, the pressure limit of Bourdon tube is set at 0.30Mpa～0.45Mpa.
3. gas density relay as claimed in claim 1 is characterized in that: when rated operating pressure=0.30Mpa, the pressure limit of Bourdon tube is set at 0.29Mpa～0.35Mpa.
4. gas density relay as claimed in claim 1 is characterized in that: when rated operating pressure=0.60Mpa, the pressure limit of Bourdon tube is set at 0.48Mpa～0.75Mpa.
5. gas density relay as claimed in claim 1 is characterized in that: when rated operating pressure=0.50Mpa, the pressure limit of Bourdon tube is set at 0.47Mpa～0.55Mpa.
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.
7. the pressure limit system of selection of the Bourdon tube of gas density relay manufacturing may further comprise the steps:
The pressure limit that described Bourdon tube carried and the rated operating pressure of described density monitor are complementary, that is: when rated operating pressure≤0.40Mpa, the pressure limit of Bourdon tube is 〉=0.29Mpa; When rated operating pressure＞0.40Mpa, the pressure limit of Bourdon tube is 〉=0.47Mpa;
When rated operating pressure=0.40Mpa, the pressure limit of Bourdon tube is 0.30Mpa～0.45Mpa;
When rated operating pressure=0.30Mpa, the pressure limit of Bourdon tube is 0.29Mpa～0.35Mpa;
When rated operating pressure=0.60Mpa, the pressure limit of Bourdon tube is 0.48Mpa～0.75Mpa;
When rated operating pressure=0.50Mpa, the pressure limit of Bourdon tube is 0.47Mpa～0.55Mpa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810039682A CN101615526A (en) | 2008-06-26 | 2008-06-26 | The pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810039682A CN101615526A (en) | 2008-06-26 | 2008-06-26 | The pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made |
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| CN101615526A true CN101615526A (en) | 2009-12-30 |
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| CN200810039682A Pending CN101615526A (en) | 2008-06-26 | 2008-06-26 | The pressure limit system of selection that a kind of gas density relay and Bourdon tube thereof are made |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987724A (en) * | 2019-12-23 | 2020-04-10 | 朗松珂利(上海)仪器仪表有限公司 | Matching and testing method for density relay, spring tube and temperature compensation element |
| CN110657912B (en) * | 2019-09-20 | 2022-05-06 | 慈溪市普莱斯仪表有限公司 | Gas indicator spring tube and manufacturing method thereof |
-
2008
- 2008-06-26 CN CN200810039682A patent/CN101615526A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657912B (en) * | 2019-09-20 | 2022-05-06 | 慈溪市普莱斯仪表有限公司 | Gas indicator spring tube and manufacturing method thereof |
| CN110987724A (en) * | 2019-12-23 | 2020-04-10 | 朗松珂利(上海)仪器仪表有限公司 | Matching and testing method for density relay, spring tube and temperature compensation element |
| CN110987724B (en) * | 2019-12-23 | 2022-04-26 | 朗松珂利(上海)仪器仪表有限公司 | Matching and testing method for density relay, spring tube and temperature compensation element |
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Application publication date: 20091230 |