CN205785608U - The sensor device of on-line monitoring breaker closing spring pressure - Google Patents
The sensor device of on-line monitoring breaker closing spring pressure Download PDFInfo
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- CN205785608U CN205785608U CN201620170079.7U CN201620170079U CN205785608U CN 205785608 U CN205785608 U CN 205785608U CN 201620170079 U CN201620170079 U CN 201620170079U CN 205785608 U CN205785608 U CN 205785608U
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Abstract
This utility model provides the sensor device of a kind of on-line monitoring breaker closing spring pressure, including switching-in spring (10), switching-in spring steady pin (11), the pressure transducer (12) being arranged on steady pin and signal processing circuit board.Switching-in spring steady pin (11) is arranged on the rear of switching-in spring hold-down support (19), and the intermediate cross-section diameter of switching-in spring steady pin (11) is less than proximal end face diameter, is used for clasping switching-in spring and fixes seat.Signal processing circuit board includes RF wave filter, signal amplifier and 16 ultra high speed A/D conversion.Described pressure transducer (12) uses strain piezoresistive transducer chip.The sensor device of this on-line monitoring breaker closing spring pressure can the pressure of monitoring breaker switching-in spring constantly, provide reliable data for breaker mechanic property on-line monitoring.
Description
Technical field
This utility model belongs to electrical equipment technical field, relates to chopper on-line monitoring sensor field, particularly for the switching-in spring pressure transducer of intelligent breaker spring operating mechanism on-line monitoring.
Background technology
According to chopper operation troubles statistical analysis in recent years, circuit breaker failure is concentrated mainly in machinery aspect, about accounts for 80%.Increasing researcher starts to notice that the research and development of mechanical characteristic of high-voltage circuit breaker, chopper dynamic mechanically characteristic can reflect running status and the incipient fault of chopper effectively.In running, chopper switching-in spring compresses and increasing along with breaker operator number of times for a long time, and switching-in spring is not provided that the phenomenon of enough energy by being likely to occur because of fatigue, the generation of the fault not in place that thus causes closing a floodgate.Therefore, it is necessary to develop a kind of can the sensor device of monitoring breaker switching-in spring pressure constantly.
Utility model content
Shortcoming and defect for existing gas-insulated switchgear, this utility model provides the sensor device of a kind of on-line monitoring breaker closing spring pressure, including switching-in spring, switching-in spring steady pin, the pressure transducer being arranged on steady pin and signal processing apparatus.
According to a most preferred embodiment of the present utility model, switching-in spring steady pin is arranged on switching-in spring and fixes the rear of seat, and the intermediate cross-section diameter of switching-in spring steady pin is less than proximal end face diameter, is used for clasping switching-in spring and fixes seat.
According to a most preferred embodiment of the present utility model, described pressure transducer uses strain piezoresistive transducer chip.
According to a most preferred embodiment of the present utility model, described signal processing device is set to signal processing circuit board, and it includes RF wave filter, signal amplifier and position ultra high speed A/D conversion.
According to a most preferred embodiment of the present utility model, being fitted with switching-in spring hold-down support at switching-in spring two ends, wherein switching-in spring the first hold-down support coordinates with spring mechanism ox head, and switching-in spring the second hold-down support coordinates with switching-in spring steady pin.
According to a most preferred embodiment of the present utility model, according to a most preferred embodiment of the present utility model, switching-in spring steady pin two ends have screwed hole, are arranged on the left side plate of breaker mechanism by switching-in spring steady pin by bolt and pad.
According to a most preferred embodiment of the present utility model, described pressure transducer is arranged on switching-in spring steady pin at end face side, keeps certain distance with screwed hole.
According to a most preferred embodiment of the present utility model, described pressure transducer glue covers surface with waterproof and dustproof.
The sensor device of the on-line monitoring breaker closing spring pressure that this utility model is new can the pressure of monitoring breaker switching-in spring constantly, provide reliable data for breaker mechanic property on-line monitoring.
Accompanying drawing explanation
Figure 1A-1C is the transducer arrangement configuration schematic diagram of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment；Wherein, Figure 1A is axonometric chart, and Figure 1B is the switching-in spring steady pin part-structure schematic diagram equipped with pressure transducer, and Fig. 1 C is the profile of line A-A in Figure 1B；
Fig. 2 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, switching-in spring pressure sensor apparatus schematic diagram；
Fig. 3 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure transducer principle assumption diagram；
Fig. 4 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure sensor signal process chart；
Fig. 5 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure signal amplifier section circuit theory diagrams；
Fig. 6 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, switching-in spring pressure on-line monitoring curve during breaker energy storage；
Main Reference Numerals illustrates: 10-switching-in spring, 11-switching-in spring steady pin, 12-pressure sensor chip, 14-screwed hole, 16-spring mechanism ox head, 18-switching-in spring hold-down support, 19-switching-in spring hold-down support.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present utility model, it is more fully described most preferred embodiment of the present utility model.
This utility model purpose is not to be provided that enough energy are to the problem carrying out closing operation for switching-in spring because of tired, it is proposed that a kind of can the sensor device of on-line monitoring breaker closing spring pressure.
The purpose of this utility model can be achieved through the following technical solutions.Figure 1A-1C is the transducer arrangement configuration schematic diagram of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment；Wherein, Figure 1A is axonometric chart, and Figure 1B is the switching-in spring steady pin part-structure schematic diagram equipped with pressure transducer, and Fig. 1 C is the profile of line A-A in Figure 1B.The sensor device of on-line monitoring breaker closing spring pressure, including switching-in spring 10, switching-in spring steady pin 11, the pressure transducer 12 being arranged on steady pin and signal processing apparatus (not shown in accompanying drawing).
According to a most preferred embodiment of the present utility model, switching-in spring steady pin 11 is arranged on the rear of switching-in spring hold-down support 19, and the intermediate cross-section diameter of switching-in spring steady pin 11 is less than proximal end face diameter, is used for clasping switching-in spring and fixes seat.As Figure 1B and Fig. 2 becomes apparent from illustrate.
According to a most preferred embodiment of the present utility model, described pressure transducer 12 uses strain piezoresistive transducer chip.
According to a most preferred embodiment of the present utility model, described signal processing device is set to signal processing circuit board, and it includes RF wave filter, signal amplifier and 16 ultra high speed A/D conversion, and physical circuit is as shown in Figure 5.
According to a most preferred embodiment of the present utility model, switching-in spring steady pin 11 two ends have screwed hole 14, can be arranged on the left side plate of breaker mechanism by switching-in spring steady pin 11 by bolt and pad.
Switching-in spring is described just for switching-in spring part in operating mechanism as the power source of circuit breaker operation mechanism, presently preferred embodiment.With reference to shown in Figure 1A-1C, being fitted with switching-in spring hold-down support 18,19 at switching-in spring 10 two ends, wherein the switching-in spring hold-down support 18 in left side coordinates with spring mechanism ox head 16, and the switching-in spring hold-down support 19 on right side coordinates with switching-in spring steady pin 11.Chopper is during energy storage, and switching-in spring steady pin 11 is in relative static conditions, and spring mechanism ox head 16 slowly compresses switching-in spring 10 and carries out energy storage.
Fig. 2 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, switching-in spring pressure sensor apparatus schematic diagram.Pressure sensor chip 12 is arranged on the switching-in spring steady pin 11 side near end face, and covers its surface with the purpose reaching waterproof and dustproof with glue after installing sensor.Switching-in spring steady pin intermediate cross-section radial design is less than the section radius of close end face, is used for clasping switching-in spring hold-down support 19.Steady pin two ends are all designed with screwed hole 14, utilize bolt and plain cushion to be installed on the side plate of chopper by gim peg.Pressure sensor chip 12 fitting depth and screwed hole 14 need to keep 0.5-3 millimeter.According to this utility model most preferred embodiment, use the distance of 1 millimeter, in switching-in spring steady pin installation process, avoid sensor chip to face switching-in spring hold-down support 19 as far as possible.Switching-in spring steady pin 11 can produce after breaker closing spring 10 forced compression the effect of power, and pressure signal can be converted to voltage signal according to its stressing conditions by the pressure sensor chip 12 being arranged on switching-in spring steady pin 11.
Fig. 3 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure transducer principle assumption diagram；Pressure sensor signal process chart.This sensor uses strain piezoresistive transducer, and sensor chip has four signal line 21,22,23,24 and to shield bare wire 25, and two of which pumping signal line is respectively excitation+line 21 and excitation-line 23, powers for sensor chip；Two other signal line+line 22 and signal-line 24, the data recorded for output transducer.This pressure transducer operation principle is as follows: pressure transducer is not in the case of having stress, and its resistance brachium pontis is in poised state, and signal output voltage is zero；Pressure transducer is in the case of by ambient pressure or pulling force, and foil gauge deforms upon and causes arm resistance to change, thus changes output voltage.
Fig. 4 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure sensor signal process chart.After pressure transducer experiences the pressure of switching-in spring, corresponding magnitude of voltage is exported according to strain transducer resistance variations, the amplitude of sensor output voltage is usually several millivolts to tens millivolts, need to be amplified through instrument amplifier, this instrument amplifier has the advantages that input resistance is high, common mode rejection ratio is high and difference mode gain is big, it is possible to effectively amplified by the differential signal that pressure transducer exports.Then signal utilizes Cortex-M4MCU chip to carry out 16 AD conversion at a high speed after amplifying, and the analog difference signal after amplifying is converted to digital signal and uploads to PC upper computer software.
Use such scheme, owing to sensor chip is arranged on the steady pin of switching-in spring, in the course of action of chopper on/off switch, its sensor chip and steady pin are all without being moved, effectively extend service life and the certainty of measurement of sensor, and a large amount of actions of chopper can be born.Sensor chip is not directly mounted on switching-in spring, will not impact the mechanical property of chopper.Sensor chip can monitor the pressure of switching-in spring the most constantly, switching-in spring pressure signal is converted to voltage signal, then being processed by instrument amplifier and 16 ultra high speed A/D conversion, be finally uploaded to PC host computer, the on-line monitoring for breaker closing spring provides a large amount of data reliably.
Fig. 5 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, pressure signal amplifier section circuit theory diagrams.The direct current supply line 51,54 of the promising chip power supply of sensor chip, sensor differential signal output lead 52,53, chip positive ends passes through capacity earth, it is ensured that the stability of chip power supply.R8, R10, C11, C26 and C24 constitute RF wave filter, are used for filtering common mode interference signal and differential mode high-frequency signal in signal.Differential signal is input to the pin of amplifier chip input after RF wave filter, and amplifier chip uses AD8221, this chip can set according to the size of resistance value required for magnification ratio, chip magnification ratio is: AG=1+49.4K/Rg, wherein AG is signal gain, RgFor adjustable resistance.The differential signal amplified is exported by chip pin, is connected in MCU chip be AD converted process after R16, R19 and R7 dividing potential drop.The cooperation of two diode A2 and D2 is input to MCU chip voltage magnitude for control, and its voltage range is 0～3.3V, and when the current potential of A1/K2 is higher than 3.3V, diode A2 turns on, and voltage will be limited in 3.3V；When the current potential of A1/K2 is less than 0V, diode D2 turns on, and voltage will be pulled 0V.
The utility model proposes the sensor device of a kind of on-line monitoring breaker closing spring pressure, with reach can the purpose of accurate measurements breaker closing spring pressure constantly, with the generation of the fault not in place that prevents from causing because switching-in spring is tired closing a floodgate.In order to improve service life and the measurement accuracy of sensor further, sensor chip is arranged on switching-in spring steady pin, steady pin will not be moved during breaker actuation, ensure that the stability of sensor chip local environment, enable the sensor to sustain the substantial amounts of number of operations of chopper, and cover multilamellar glue in sensor chip surface, prevent chip from being affected by dust and moisture.Fig. 6 is the sensor device of the on-line monitoring breaker closing spring pressure of this utility model most preferred embodiment, switching-in spring pressure on-line monitoring curve during breaker energy storage；Breaker closing spring is during energy storage, mechanism's ox head compression switching-in spring, the stress making switching-in spring is gradually increased, sensor chip can monitor the stressing conditions of spring in thermal energy storage process constantly, and pressure signal is converted to voltage signal, amplify through signal and upload to PC process after ultra high speed A/D conversion.
Although disclosing preferred embodiment of the present utility model and accompanying drawing for the purpose of illustration, but person skilled in the art, without departing from this utility model and appended spirit and scope by the claims, can make various replacement, change and retouch.Therefore, this utility model should not be limited to preferred embodiment and accompanying drawing disclosure of that, and protection domain of the present utility model is defined in the range of standard with appending claims.
Claims (8)
1. the sensor device of an on-line monitoring breaker closing spring pressure, including switching-in spring (10), it is characterised in that: the pressure transducer (12) also include switching-in spring steady pin (11), being arranged on steady pin and signal processing apparatus；Switching-in spring steady pin (11) is arranged on the rear of switching-in spring hold-down support (19)；Described signal processing apparatus is for being converted to the signal of telecommunication by the pressure signal that pressure transducer (12) collects.
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 1, it is characterised in that: the intermediate cross-section diameter of switching-in spring steady pin (11) is less than proximal end face diameter, is used for clasping switching-in spring and fixes seat.
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 1, it is characterised in that: described pressure transducer (12) uses strain piezoresistive transducer chip.
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 1, it is characterised in that: described signal processing device is set to signal processing circuit board, and it includes RF wave filter, signal amplifier and 16 ultra high speed A/D conversion.
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 1, it is characterized in that: be fitted with switching-in spring hold-down support (18,19) at switching-in spring (10) two ends, one of them switching-in spring hold-down support (18) coordinates with spring mechanism ox head (16), and another switching-in spring hold-down support (19) coordinates with switching-in spring steady pin (11).
6. according to the sensor device of the on-line monitoring breaker closing spring pressure described in claim 1-5 any one, it is characterized in that: switching-in spring steady pin (11) two ends have screwed hole (14), by bolt and pad, switching-in spring steady pin (11) is arranged on the left side plate of breaker mechanism.
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 6, it is characterized in that: described pressure transducer (12) is arranged at the close end face side of switching-in spring steady pin (11), has distance with screwed hole (14).
The sensor device of on-line monitoring breaker closing spring pressure the most according to claim 7, it is characterised in that: described pressure transducer (12) glue covers surface with waterproof and dustproof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620170079.7U CN205785608U (en) | 2016-03-07 | 2016-03-07 | The sensor device of on-line monitoring breaker closing spring pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620170079.7U CN205785608U (en) | 2016-03-07 | 2016-03-07 | The sensor device of on-line monitoring breaker closing spring pressure |
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| CN205785608U true CN205785608U (en) | 2016-12-07 |
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| CN201620170079.7U Active CN205785608U (en) | 2016-03-07 | 2016-03-07 | The sensor device of on-line monitoring breaker closing spring pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692852A (en) * | 2018-08-10 | 2018-10-23 | 无锡铭方科技有限公司 | A kind of ACB mechanism for testing |
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2016
- 2016-03-07 CN CN201620170079.7U patent/CN205785608U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692852A (en) * | 2018-08-10 | 2018-10-23 | 无锡铭方科技有限公司 | A kind of ACB mechanism for testing |
| CN108692852B (en) * | 2018-08-10 | 2023-11-03 | 无锡铭方科技有限公司 | ACB (active ingredient) testing mechanism |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180608 Address after: Baden, Switzerland Patentee after: ABB TECHNOLOGY LTD. Address before: Zurich Patentee before: ABB T & D Technology Ltd. |