CN204128697U - Busbar joint overtemperature attention device - Google Patents
Busbar joint overtemperature attention device Download PDFInfo
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- CN204128697U CN204128697U CN201420527709.2U CN201420527709U CN204128697U CN 204128697 U CN204128697 U CN 204128697U CN 201420527709 U CN201420527709 U CN 201420527709U CN 204128697 U CN204128697 U CN 204128697U
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Abstract
The utility model discloses a kind of busbar joint overtemperature attention device, it comprises temperature control charging circuit, hysteresis circuitry and flasher circuit, described temperature control charging circuit connection bus and hysteresis circuitry, and hysteresis circuitry is connected with flasher circuit; The thermistor of temperature control charging circuit contacts with busbar joint and arranges.The alternating current that capacity plate antenna obtains, after diode rectification, is stored on electric capacity C1 through thermistor.When the voltage at electric capacity C1 two ends is elevated to more than threshold value along with charging, hysteresis circuitry triggers, make flasher circuit luminous, consume the electricity on electric capacity C1, and reduce along with the electricity of C1, voltage reduces, lower than threshold value then hysteresis circuitry cut off the power supply of flasher circuit, electric capacity C1 reenters the charging stage.Busbar joint temperature is higher, then flashing rate is larger, intuitively can understand the temperature regime of busbar joint according to flashing rate.This programme is applicable to high voltage power transmission field.
Description
Technical field
The utility model relates to high voltage power transmission field, especially relates to a kind of busbar joint overtemperature attention device monitoring busbar joint temperature.
Background technology
In electrical energy transmitting procedure, in order to reduce line loss and heating, often take to put forward high-tension method, but have to again under voltage drop in distribution link, the heating of such transmission of electricity bus and line loss become again a problem having to pay attention to, and bus generates heat the most concentrated position mostly at joint area, and this joint is widely distributed and hidden, be difficult to monitoring, therefore adopt a kind of effective technological means to carry out Real-Time Monitoring to it extremely urgent.
Present people effectively do not observe busbar joint overtemperature mostly, and distribution is too extensive on the one hand, and on the other hand bus exists high pressure, monitoring difficulty is larger.Some technician take infrared thermometry mode irregularly to patrol and examine, but often poor effect, and real-time is too poor, temperature indeterminacy.
State Intellectual Property Office of the People's Republic of China disclosed on 05 26th, 1999 the patent documentation that publication number is CN2321036, title is a kind of distribution bus overtemperature warning device, the temperature sensing circuit that its control circuit includes power circuit, be connected in series with power circuit, on-off circuit, the warning circuit be connected with switching circuitry output, be connected with on-off circuit input end after power circuit is connected in series with temperature sensing circuit.This scheme needs external power supply, and can only see whether temperature exceedes limit value and cannot understand current concrete state, and alarming effect is obvious not.
Summary of the invention
The utility model mainly solves not obvious etc. the technical matters of the external power supply of needs existing for prior art, alarming effect, provide a kind of without the need to external power supply, intuitively can understand current temperature status, structure simple busbar joint overtemperature attention device.
The utility model is mainly solved by following technical proposals for above-mentioned technical matters: a kind of busbar joint overtemperature attention device, comprise temperature control charging circuit, hysteresis circuitry and flasher circuit, described temperature control charging circuit comprises capacity plate antenna, diode D1, thermistor and electric capacity C1, the positive plate of described capacity plate antenna connects the bus of high tension loop, and negative plate be arranged in parallel with the earth potential plane as high tension loop ground wire; The positive pole of diode D1 connects positive plate, and negative pole connects the positive pole of electric capacity C1 by thermistor NTC; The negative pole of electric capacity C1 connects negative plate; The positive pole of electric capacity C1 is connected hysteresis circuitry with negative pole, and hysteresis circuitry is connected with flasher circuit; Described thermistor contacts with busbar joint and arranges.
High tension loop comprises bus and ground wire.Series connection two devices in the two poles of the earth of alternating electric field, so voltage of electric field can be divided into two by they, load is connected in parallel on one of them device, just can obtains the energy of alternating electric field, then this energy just can be supplied after overcommutation, filtering, voltage stabilizing subsequent device and use.In high-voltage alternating electric field collection of energy, it has electric current to pass through without the need to primary circuit, as long as there is high-voltage alternating electric field.
In this programme, attention device internal structure capacity plate antenna, the positive plate of capacity plate antenna, negative plate and earth potential plane form the electric capacity of two series connection, just can obtain the energy needed for attention device from one of them electric capacity.The alternating current obtained is after diode rectification, be stored on electric capacity C1 through thermistor, thermistor is as the problem at temperature sensing device sensing busbar joint place, when temperature raises, thermistor resistance reduces, and the charging rate on electric capacity C1 is accelerated, otherwise, the resistance of thermistor increases, and the charging rate on electric capacity C1 slows down.When the voltage at electric capacity C1 two ends is elevated to more than threshold value along with charging, hysteresis circuitry triggers, make flasher circuit luminous, consume the electricity on electric capacity C1, and reduce along with the electricity of C1, voltage reduces, lower than threshold value then hysteresis circuitry cut off the power supply of flasher circuit, electric capacity C1 reenters the charging stage.Busbar joint temperature is higher, then flashing rate is larger, intuitively can understand the temperature regime of busbar joint according to flashing rate.
As preferably, described hysteresis circuitry comprises resistance R1, resistance R2, resistance R3, comparer U1, diode D2 and diode D3, the in-phase input end of described comparer U1 connects the positive pole of electric capacity C1 by resistance R1, inverting input connects the negative pole of diode D2, the positive pole of diode D2 connects the negative pole of electric capacity C1, one end of resistance R2 connects the in-phase input end of comparer U1, and the other end connects the negative pole of electric capacity C1; One end of resistance R3 connects the in-phase input end of comparer U1, and the other end connects diode D3 positive pole, and the negative pole of diode D3 connects the output terminal of comparer U1; The output terminal of comparer U1 connects flasher circuit; Diode D2 is voltage stabilizing diode.
When electric capacity C1 voltage rise to a certain extent time, voltage (the in-phase input end terminal voltage of comparer) after resistance R1, resistance R2 dividing potential drop is greater than reference voltage (comparer inverting input terminal voltage), export high level after comparator hysteresis certain hour, flasher circuit is lighted; Because flasher circuit is lighted, consume energy on electric capacity C1, on comparer in-phase input end, voltage also declines thereupon, is less than reference voltage, now output low level after comparator hysteresis certain hour, and flasher circuit extinguishes.So go round and begin again, just serve schillerization.Because the charging rate of electric capacity C1 controls by temperature-sensitive resistance, thermistor resistance affects by busbar joint temperature, therefore just achieves temperature height and the proportionate relationship of flashing rate.
As preferably, described flasher circuit comprises LED, and the positive pole of described LED connects the output terminal of comparer U1, and negative pole connects the negative pole of electric capacity C1.
The beneficial effect that the utility model brings is, the judgment mode of busbar joint overtemperature is more directly perceived, and this programme adopts high-brightness LED flickering method to remind overtemperature, high-visible outside flash message several meters, patrols and examines very convenient; The frequency that temperature and the LED of busbar joint glimmer is directly proportional, and time normothermic, the LED several seconds glimmers once, and when temperature raises, flicker is accelerated, and when temperature reaches degree more than 100 time, flicker frequency reaches tens Hz, observes very convenient; This device is fixed on high-tension line, adopting electric field energy to obtain flash of light energy, powering without the need to adopting other modes; The product structure formed due to the present invention is simple, device is simplified, and therefore product can be accomplished inexpensive, is convenient to widely use on a large scale.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of busbar joint overtemperature attention device of the present embodiment, as shown in Figure 1, comprise temperature control charging circuit, hysteresis circuitry and flasher circuit, described temperature control charging circuit comprises capacity plate antenna, diode D1, thermistor NTC and electric capacity C1, the positive plate PH of described capacity plate antenna connects the bus of high tension loop, and negative plate PL be arranged in parallel with the earth potential plane GND as high tension loop ground wire; The positive pole of diode D1 connects positive plate, and negative pole connects the positive pole of electric capacity C1 by thermistor NTC; The negative pole of electric capacity C1 connects negative plate; The positive pole of electric capacity C1 is connected hysteresis circuitry with negative pole, and hysteresis circuitry is connected with flasher circuit; Described thermistor contacts with busbar joint and arranges.
Hysteresis circuitry comprises resistance R1, resistance R2, resistance R3, comparer U1, diode D2 and diode D3, the in-phase input end of described comparer U1 connects the positive pole of electric capacity C1 by resistance R1, inverting input connects the negative pole of diode D2, the positive pole of diode D2 connects the negative pole of electric capacity C1, one end of resistance R2 connects the in-phase input end of comparer U1, and the other end connects the negative pole of electric capacity C1; One end of resistance R3 connects the in-phase input end of comparer U1, and the other end connects diode D3 positive pole, and the negative pole of diode D3 connects the output terminal of comparer U1; The output terminal of comparer U1 connects flasher circuit; Diode D2 is voltage stabilizing diode.
Flasher circuit comprises LED, and the positive pole of described LED connects the output terminal of comparer U1, and negative pole connects the negative pole of electric capacity C1.
Attention device internal structure two pole plates of capacity plate antenna, using ground level as the 3rd pole, these three pole plates are equivalent to two capacitances in series, obtain the energy needed for device from one of them electric capacity.
AC power, after diode rectification, stores the energy on electric capacity C1 through NTC resistance, and NTC is as temperature sensing device sensing busbar joint temperature, and when temperature raises, NTC resistance reduces, and the charging rate on C1 is accelerated.Otherwise NTC increases, and the upper charging rate of C1 slows down.
When C1 voltage rise to a certain extent time, voltage after R1, R2 dividing potential drop (comparer+terminal voltage) is greater than reference voltage (Bi compare Qi – terminal voltage), and export high level after comparator hysteresis certain hour, LED lights; Because LED lights, consume energy on C1, on comparer+pin, voltage also declines thereupon, is less than reference voltage, now output low level after comparator hysteresis certain hour, and LED extinguishes.So go round and begin again, just serve schillerization.Because the charging rate of C1 controls by NTC resistance, NTC resistance affects by bus temperature, therefore just achieves temperature height and the proportionate relationship of flashing rate.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the terms such as capacity plate antenna, thermistor, comparer herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (3)
1. a busbar joint overtemperature attention device, it is characterized in that, comprise temperature control charging circuit, hysteresis circuitry and flasher circuit, described temperature control charging circuit comprises capacity plate antenna, diode D1, thermistor and electric capacity C1, the positive plate of described capacity plate antenna connects the bus of high tension loop, and negative plate be arranged in parallel with the earth potential plane as high tension loop ground wire; The positive pole of diode D1 connects positive plate, and negative pole connects the positive pole of electric capacity C1 by thermistor NTC; The negative pole of electric capacity C1 connects negative plate; The positive pole of electric capacity C1 is connected hysteresis circuitry with negative pole, and hysteresis circuitry is connected with flasher circuit; Described thermistor contacts with busbar joint and arranges.
2. busbar joint overtemperature attention device according to claim 1, it is characterized in that, described hysteresis circuitry comprises resistance R1, resistance R2, resistance R3, comparer U1, diode D2 and diode D3, the in-phase input end of described comparer U1 connects the positive pole of electric capacity C1 by resistance R1, inverting input connects the negative pole of diode D2, the positive pole of diode D2 connects the negative pole of electric capacity C1, and one end of resistance R2 connects the in-phase input end of comparer U1, and the other end connects the negative pole of electric capacity C1; One end of resistance R3 connects the in-phase input end of comparer U1, and the other end connects diode D3 positive pole, and the negative pole of diode D3 connects the output terminal of comparer U1; The output terminal of comparer U1 connects flasher circuit; Diode D2 is voltage stabilizing diode.
3. busbar joint overtemperature attention device according to claim 1 and 2, it is characterized in that, described flasher circuit comprises LED, and the positive pole of described LED connects the output terminal of comparer U1, and negative pole connects the negative pole of electric capacity C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420527709.2U CN204128697U (en) | 2014-09-15 | 2014-09-15 | Busbar joint overtemperature attention device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420527709.2U CN204128697U (en) | 2014-09-15 | 2014-09-15 | Busbar joint overtemperature attention device |
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| CN204128697U true CN204128697U (en) | 2015-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644114A (en) * | 2017-01-06 | 2017-05-10 | 四川埃姆克伺服科技有限公司 | Temperature sensor signal processing circuit |
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- 2014-09-15 CN CN201420527709.2U patent/CN204128697U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644114A (en) * | 2017-01-06 | 2017-05-10 | 四川埃姆克伺服科技有限公司 | Temperature sensor signal processing circuit |
| CN106644114B (en) * | 2017-01-06 | 2023-06-20 | 四川埃姆克伺服科技有限公司 | Temperature sensor signal processing circuit |
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