CN204188323U - For the pressure transducer of contacts for vacuum-break switches spring pressure monitoring - Google Patents
For the pressure transducer of contacts for vacuum-break switches spring pressure monitoring Download PDFInfo
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- CN204188323U CN204188323U CN201420642160.1U CN201420642160U CN204188323U CN 204188323 U CN204188323 U CN 204188323U CN 201420642160 U CN201420642160 U CN 201420642160U CN 204188323 U CN204188323 U CN 204188323U
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Abstract
A kind of pressure transducer for the monitoring of contacts for vacuum-break switches spring pressure, it is characterized in that, described pressure transducer comprises pedestal, pressure-sensing device, pressure-sensing device cover plate and output cable, described pedestal comprises the through hole with annular shoulder, described pressure-sensing device is arranged on the annular shoulder of described through hole, described pressure-sensing device cover plate is also arranged in described through hole and a part for described pressure-sensing device cover plate is exposed from described pedestal, described pressure-sensing device is clamped between described annular shoulder and described pressure-sensing device cover plate, one end of described output cable is connected with described pressure-sensing device, the other end of described output cable is connected with the framework of vacuum circuit breaker.
Description
Technical field
The utility model relates to pressure transducer, particularly for the pressure transducer of contacts for vacuum-break switches spring pressure monitoring.
Background technology
The vacuum circuit breaker excess of stroke is a very important parameter, and the change of this parameter directly can affect the opening velocity of isolating switch, and the opening velocity of isolating switch is the key parameter that isolating switch determines breaking and making ability performance.Within the whole service cycle of isolating switch, breaker over-travel can change.For a new isolating switch, after rated current or short-circuit current cut-off several times, due to the effect of electric arc, arc-chutes contact surface local can be deformed, cause breaker over-travel to increase.Along with the increase of accumulative dropout current, because electric arc is to the ablation of arc-chutes contact, breaker over-travel is reduced gradually.Most of arc-chutes regulation contact maximum ablation amount (also crying contact maximum permission wear extent) are 3mm.But in isolating switch runs, when the contact actual ablation amount of arc-chutes exceedes the maximum ablation amount of contact of its regulation is be difficult to judge.Up to the present, in isolating switch operational process, not effectively reliably breaker over-travel monitoring mode, does not also monitor the ablation amount of arc-chutes contact reality or wear extent.
Up to the present, in isolating switch operational process, to breaker over-travel when being only prophylactic repair, off-line measurement being carried out to the ablation amount of arc-chutes contact reality or wear extent, but cannot measure touch spring pressure.To touch spring pressure, breaker over-travel, ablation amount or the wear extent of arc-chutes contact reality do not have on-line monitoring.Can only carry out periodic maintenance to equipment like this, cannot provide strong maintenance suggestion, causing when needing repairing can not on-call maintenance, and keep in repair when not needing repairing on the contrary, reliability is low, and maintenance cost is high.
Utility model content
The object of this utility model is to effectively reliably monitor breaker over-travel, as required also can the firm branch of monitoring breaker and firm chalaza, improve the operational reliability of isolating switch, the state of isolating switch can be monitored, there is provided early warning to purpose of breaker failure, provide data reference to isolating switch the need of maintenance.This utility model may be used for vacuum circuit breaker, also may be used for other vacuum switch such as vacuum contactor or vacuum recloser.
In order to overcome above-mentioned defect of the prior art, the utility model proposes a kind of pressure transducer for the monitoring of contacts for vacuum-break switches spring pressure, described pressure transducer comprises pedestal, pressure-sensing device, pressure-sensing device cover plate and output cable, described pedestal comprises the through hole with annular shoulder, described pressure-sensing device is arranged on the annular shoulder of described through hole, described pressure-sensing device cover plate is also arranged in described through hole and a part for described pressure-sensing device cover plate is exposed from described pedestal, described pressure-sensing device is clamped between described annular shoulder and described pressure-sensing device cover plate, one end of described output cable is connected with described pressure-sensing device, for outwards exporting the signal of described pressure-sensing device, the other end of described output cable is connected with the framework of vacuum circuit breaker.
Described pressure-sensing device structure ringwise.
Described pressure-sensing device cover plate structure ringwise.
Described output cable is fixed by an elastic protecting sleeve, and one end of this elastic protecting sleeve is fixed on pressure-sensing device, and its other end is fixed on the framework of vacuum circuit breaker, thus protects described output cable.
One contact stem through described pedestal through hole and be connected to described pedestal by nut through described pressure-sensing device and described pressure-sensing device cover plate.
Distance between described nut and described pedestal is the vacuum circuit breaker excess of stroke.
Described contact stem is also provided with the touch spring be clamped between two spring bumper covers, a part for the described pressure-sensing device cover plate exposed from described pedestal can contact with described spring bumper cover.
According to said structure, discuss the principle of work of this pressure transducer below in detail.
The pressure size of described pressure-sensing device Real-Time Monitoring touch spring and change procedure, and the impulsive force that the collision, vibration etc. in isolating switch on/off switch course of action causes is born by the pedestal of pressure transducer.Due to the very light weight of touch spring itself, the impulsive force that collision, vibration etc. therefore and in isolating switch on/off switch course of action cause changes the stressed size of pressure-sensing device hardly.When vacuum circuit breaker is in closing position, the position relationship of touch spring and pressure transducer is as shown in Fig. 4 A position.When vacuum circuit breaker is in separating brake process, contacts for vacuum-break switches does not also separate, in the process that touch spring is releasing energy, or when vacuum circuit breaker is in making process, after contacts for vacuum-break switches contact, touch spring compresses, and in the process of storage power, the position relationship of touch spring and pressure transducer is as shown in Fig. 4 B position.When vacuum circuit breaker in operation, contact is in released state or isolating switch when open position, and the position relationship of touch spring and pressure transducer is as shown in Fig. 4 C position.In different positions, along with the difference of touch spring decrement, pressure sensor monitoring to pressure (being actually the pressure of touch spring) also can be different.Simultaneously in the operating process that isolating switch is different, the moment that can start according to pressure change or terminate judges the firm branch in breaker open operation process and the firm chalaza in making process.
According to the pressure transducer of special construction of the present utility model to the contact pressure of breaker closing position, open position, touch spring precompression carries out on-line monitoring, can detect simultaneously in making process from be just incorporated into closing position contact pressure change curve and separating brake process from closing position to the change curve of firm point moment contact pressure.
According to the utility model, for the isolating switch being in running status, by monitoring point, the change of closing position contact spring pressure, monitors its excess of stroke, can improve the operational reliability of isolating switch, calculate the actual wear amount of arc-chutes contact, provide reference to overhaul of line breaker demand.When operating, monitor its firm chalaza or firm branch as required, for calculating the isolating switch on/off switch time, this is also the necessary parameter that on/off switch speed calculates.
In the process that isolating switch runs, the pressure transducer moment monitoring pressure size of touch spring and change procedure, judge contact of breaker spring pressure whether in the scope of technical requirement.In the operating process that isolating switch is different, the firm chalaza in the firm division and combination lock process that the moment starting or terminate according to pressure change judges in breaker open operation process, thus determine whether the circuit-breaker switching on-off time meets technical requirement.
So far, in order to the detailed description of the utility model at this can be better understood, and can be realized better the contribution of prior art in order to the utility model, the disclosure outlines embodiment of the present utility model quite widely.Certainly, embodiment of the present utility model will be described below and will form the theme of claims.
Before in detail explaining embodiment of the present utility model, should be appreciated that the utility model is not restricted in its application and propose in the following description or the details of structure illustrated in the accompanying drawings and the configuration of parts and suitable step.The utility model can have except describe those except embodiment, and can to implement by different way and carry out.Moreover, should be appreciated that the wording that adopts at this and term and summary are the objects in order to describe, should not think determinate.
Similarly, those skilled in the art will recognize that, the disclosure based on design can be easily used as design other structure basis, for implementing several object of the present utility model.Therefore, importantly, claims will be understood that and comprise such equivalent structure, as long as they do not exceed essence of the present utility model and scope.
Accompanying drawing explanation
Better understanding will be had to the utility model by accompanying drawing those skilled in the art below, and more can clearly embody advantage of the present utility model.Accompanying drawing described herein is only in order to the illustration purpose of selected embodiment, instead of all possible embodiment and be intended to not limit scope of the present utility model.
Fig. 1 illustrates and partly cuts open three-dimensional view according to pressure transducer of the present utility model;
Fig. 2 illustrates the three-dimensional view of the assembly structure of described pressure transducer and contacts for vacuum-break switches spring;
Fig. 3 illustrates the side view of the assembly structure of described pressure transducer and contacts for vacuum-break switches spring;
Fig. 4 A-Fig. 4 C illustrates the position relationship of described touch spring and described pressure transducer.
Embodiment
Be described in detail to according to preferred embodiment of the present utility model below with reference to accompanying drawing.By accompanying drawing and corresponding explanatory note, it will be understood to those of skill in the art that characteristics and advantages of the present utility model.
Partly cut open shown in three-dimensional view as Fig. 1, the utility model proposes a kind of pressure transducer for the monitoring of contacts for vacuum-break switches spring pressure, pressure transducer comprises pedestal 1, pressure-sensing device 2, pressure-sensing device cover plate 3 and output cable 4, pedestal 1 comprises the through hole 1-2 with annular shoulder 1-1, pressure-sensing device 2 is arranged on the annular shoulder 1-1 of described through hole 1-2, pressure-sensing device cover plate 3 is also arranged in described through hole 1-2 and a part for pressure-sensing device cover plate 3 is exposed from pedestal 1, pressure-sensing device 2 is clamped between described annular shoulder 1-1 and pressure-sensing device cover plate 3, one end of output cable 4 is connected with pressure-sensing device 2, for outwards exporting the signal of described pressure-sensing device 2, the other end of output cable 4 is connected with the framework (not shown) of vacuum circuit breaker.
Pressure-sensing device 2 structure ringwise.
Pressure-sensing device cover plate 2 structure ringwise.
Output cable 4 is fixed by an elastic protecting sleeve 5, and one end of this elastic protecting sleeve 5 is fixed on pressure-sensing device 2, and its other end is fixed on the framework of vacuum circuit breaker, thus protects described output cable 4.
One contact stem 6 through described pedestal through hole 1-2 and be connected to pedestal by nut 7 through pressure-sensing device 2 and pressure-sensing device cover plate 3.
Distance between nut and pedestal is the vacuum circuit breaker excess of stroke.
Contact stem 6 is also provided with the touch spring 9 be clamped between two spring bumper covers 8, a part for the pressure-sensing device cover plate exposed from pedestal can contact with spring bumper cover 8.
According to said structure, discuss the principle of work of this pressure transducer below in detail.
The pressure size of pressure-sensing device 2 Real-Time Monitoring touch spring 9 and change procedure, one end of output cable is connected with described pressure-sensing device 2, for outwards exporting the signal of described pressure-sensing device 2.The impulsive force that collision, vibration etc. in isolating switch on/off switch course of action cause is born by the pedestal 1 of pressure transducer.Due to the very light weight of touch spring 9 itself, the impulsive force that collision, vibration etc. therefore and in isolating switch on/off switch course of action cause changes the stressed size of pressure-sensing device 2 hardly.When vacuum circuit breaker is in closing position, the position relationship of touch spring 9 and pressure transducer is as shown in Fig. 4 A position.When vacuum circuit breaker is in separating brake process, contacts for vacuum-break switches does not also separate, in the process that touch spring 9 is releasing energy, or when vacuum circuit breaker is in making process, after contacts for vacuum-break switches contact, touch spring 9 compresses, and in the process of storage power, the position relationship of touch spring 9 and pressure transducer is as shown in Fig. 4 B position.When vacuum circuit breaker in operation, contact is in released state or isolating switch when open position, and the position relationship of touch spring 9 and pressure transducer is as shown in Fig. 4 C position.In different positions, along with the difference of touch spring 9 decrement, pressure sensor monitoring to pressure (being actually the pressure of touch spring) also can be different.Simultaneously in the operating process that isolating switch is different, the moment that can start according to pressure change or terminate judges the firm branch in breaker open operation process and the firm chalaza in making process.
According to the pressure transducer of special construction of the present utility model to the contact pressure of breaker closing position, open position, touch spring precompression carries out on-line monitoring, can detect simultaneously in making process from be just incorporated into closing position contact pressure change curve and separating brake process from closing position to the change curve of firm point moment contact pressure.
According to the utility model, for the isolating switch being in running status, by monitoring point, its excess of stroke is monitored in the change of closing position contact spring pressure, the operational reliability of isolating switch can be improved, calculate the actual wear amount of arc-chutes contact, provide reference to overhaul of line breaker demand.When operating, monitor its firm chalaza or firm branch as required, for calculating the isolating switch on/off switch time, this is also the necessary parameter that on/off switch speed calculates.
In the process that isolating switch runs, the pressure transducer moment monitoring pressure size of touch spring and change procedure, judge contact of breaker spring pressure whether in the scope of technical requirement.In the operating process that isolating switch is different, the firm chalaza in the firm division and combination lock process that the moment starting or terminate according to pressure change judges in breaker open operation process, thus determine whether the circuit-breaker switching on-off time meets technical requirement.
With reference to specific embodiment, although the utility model is illustrated in the specification and illustrated in the drawings, but be to be understood that, when not departing from the utility model scope defined in claim, art personnel can make multiple change and alternative method step, the detection means wherein of multiple equivalent.And, the combination of the technical characteristic herein between specific embodiment, element and/or function and collocation are clear distinct, therefore according to the content disclosed in these, art personnel can understand technical characteristic, element and/or function in embodiment and method step can optionally be incorporated in another specific embodiment, unless foregoing has other description.In addition, according to instruction of the present utility model, do not departing from the scope of the utility model essence, adapting to special situation and can make many changes.Therefore, the utility model is not limited to accompanying drawing institute graphic other specific embodiment, and the specific embodiment as the preferred forms at present contemplated by enforcement the utility model described in instructions, and the utility model intention comprises all embodiments fallen in above-mentioned instructions and appended right.
Claims (6)
1. the pressure transducer for the monitoring of contacts for vacuum-break switches spring pressure, it is characterized in that, described pressure transducer comprises pedestal, pressure-sensing device, pressure-sensing device cover plate and output cable, described pedestal comprises the through hole with annular shoulder, described pressure-sensing device is arranged on the annular shoulder of described through hole, described pressure-sensing device cover plate is also arranged in described through hole and a part for described pressure-sensing device cover plate is exposed from described pedestal, described pressure-sensing device is clamped between described annular shoulder and described pressure-sensing device cover plate, one end of described output cable is connected with described pressure-sensing device, the other end of described output cable is connected with the framework of vacuum circuit breaker.
2. pressure transducer according to claim 1, is characterized in that, described pressure-sensing device structure ringwise.
3. pressure transducer according to claim 2, is characterized in that, described pressure-sensing device cover plate structure ringwise.
4. pressure transducer according to claim 3; it is characterized in that, described output cable is fixed by an elastic protecting sleeve, and one end of this elastic protecting sleeve is fixed on pressure-sensing device; its other end is fixed on the framework of vacuum circuit breaker, thus protects described output cable.
5. pressure transducer according to claim 3, it is characterized in that, one contact stem through described pedestal through hole and be connected to described pedestal by nut through described pressure-sensing device and described pressure-sensing device cover plate, the distance between wherein said nut and described pedestal is the vacuum circuit breaker excess of stroke.
6. pressure transducer according to claim 5, it is characterized in that, described contact stem is also provided with the touch spring be clamped between two spring bumper covers, a part for the described pressure-sensing device cover plate exposed from described pedestal can contact with described spring bumper cover.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642160.1U CN204188323U (en) | 2014-10-30 | 2014-10-30 | For the pressure transducer of contacts for vacuum-break switches spring pressure monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642160.1U CN204188323U (en) | 2014-10-30 | 2014-10-30 | For the pressure transducer of contacts for vacuum-break switches spring pressure monitoring |
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| CN204188323U true CN204188323U (en) | 2015-03-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242202A (en) * | 2015-10-29 | 2016-01-13 | 福建中网电气有限公司 | Breaker detection apparatus |
| CN106768923A (en) * | 2016-11-30 | 2017-05-31 | 中国电力科学研究院 | A kind of vacuum arc-extinguishing chamber contact wear extent real-time online intelligent monitoring method and device |
| CN108535640A (en) * | 2018-03-29 | 2018-09-14 | 广东电网有限责任公司 | A kind of breaker coil output size detection device |
| CN114200292A (en) * | 2021-11-15 | 2022-03-18 | 国网辽宁省电力有限公司锦州供电公司 | Movable circuit breaker contact finger pressure tester and testing method thereof |
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
| CN117148230A (en) * | 2023-10-30 | 2023-12-01 | 国网辽宁省电力有限公司电力科学研究院 | State monitoring system and method for contact assembly of transformer substation |
-
2014
- 2014-10-30 CN CN201420642160.1U patent/CN204188323U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242202A (en) * | 2015-10-29 | 2016-01-13 | 福建中网电气有限公司 | Breaker detection apparatus |
| CN106768923A (en) * | 2016-11-30 | 2017-05-31 | 中国电力科学研究院 | A kind of vacuum arc-extinguishing chamber contact wear extent real-time online intelligent monitoring method and device |
| CN108535640A (en) * | 2018-03-29 | 2018-09-14 | 广东电网有限责任公司 | A kind of breaker coil output size detection device |
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
| CN114200292A (en) * | 2021-11-15 | 2022-03-18 | 国网辽宁省电力有限公司锦州供电公司 | Movable circuit breaker contact finger pressure tester and testing method thereof |
| CN117148230A (en) * | 2023-10-30 | 2023-12-01 | 国网辽宁省电力有限公司电力科学研究院 | State monitoring system and method for contact assembly of transformer substation |
| CN117148230B (en) * | 2023-10-30 | 2024-01-30 | 国网辽宁省电力有限公司电力科学研究院 | State monitoring system and method for contact assembly of transformer substation |
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