CN205193145U - Novel high -voltage electroscope - Google Patents
Novel high -voltage electroscope Download PDFInfo
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- CN205193145U CN205193145U CN201520642674.1U CN201520642674U CN205193145U CN 205193145 U CN205193145 U CN 205193145U CN 201520642674 U CN201520642674 U CN 201520642674U CN 205193145 U CN205193145 U CN 205193145U
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Abstract
The utility model relates to a whether high voltage system checkout facility electrified detection device, especially a novel high -voltage electroscope. Its characteristics are: including surveying electrode contact, should survey electrode contact and pass through negative logic NOR gate integrated circuit and be connected with audible -visual annunciator to can report to the police when electroless and not report to the police when having detected the electricity detecting, still include DC power supply, thereby this DC power supply is connected the power supply with aforesaid negative logic NOR gate integrated circuit and audible -visual annunciator respectively. The utility model belongs to multi -functional, the portable power frequency high -voltage electroscope of multipurpose, it is accurate reliable to have realized detecting, and the structure is dexterous light, cost low cost, the feasible simple effect of method. And has a following advantage: 1, adopt the low level trigger control of negative logic, electric power safety tool essence safetyization is accomplished in the acousto -optic warning dual display, ensures on -the -spot detection achievement safe and reliable.
Description
Technical field
The utility model relates to for the whether charged pick-up unit of high-voltage system checkout facility, especially a kind of novel high-pressure electroscope.
Background technology
On electric system facility, (as generating plant, transformer and distribution station inner high voltage electrical equipment and electric line etc.) have employed on-line monitoring technique means, carry out and run real-time status supervision analysis.Detect targetedly and decision-making system facility whether kilter, as whether carrying out one of basis for estimation of repair and maintenance.High-tension electricity facility upkeep operation mainly adopts power failure operation method.Electroscope is a kind of detection when overhauling electric power facility, whether meets the special detection device of stable operating conditions.By detecting that the high-pressure side knob of electric power facility is between the earth, flow through the stray capacitive currents on its surface, with check electric power facility its whether with power frequency operation voltage, thus the serious accident that the maloperation of live ground wire occurs can be avoided, when guaranteeing interruption maintenance, operating personnel's personal safety, is widely used in the middle of electric system high pressure facility service work process at present.
Specify according to " ensureing the technical measures of safety " in " State Grid Corporation of China's electric power safety working regulation (Q/GDW1799.2--2013) ": before dead line job site attaching ground wire, want first electrical verification, after identifying the true no-voltage of circuit, carry out upkeep operation again.Concrete steps are: 1, have a power failure.2, electrical verification.3, ground connection.4, individual safety wire is used.5, nameplate and installing cover bar is hung.
According to the rules: whether really electrical verification should use relevant voltage grade, qualified contact electroscope to judge high-pressure side no-voltage.During judgement, at least should have two non-same principles or nonhomologous instruction that corresponding change occurs, and there is corresponding change in all these instructions determined all simultaneously, this equipment could be confirmed without electricity.Published Chinese utility model patent title: high voltage electroscope (patent No. ZL201320004983.7, Authorization Notice No. CN203037724U, authorized announcement date on 07 03rd, 2013), making becomes non-conjunction positive logic form acoustooptic display alarm device, that is: (high pressure when having an electricity, output is 1), must report to the police; Without (low pressure, output is 0) during electricity, do not report to the police.
Its weak point is, owing to manufacturing all unknown causes of the links such as assembling, transport, keeping, use, very likely occur in the middle of frequent operation process for a long time, repeatedly at electroscope: 1, exploring electrode contact and be connected in series solder joint between inductor L, resistor R and triode T and disconnect, is bound to normally to detect.2, LED (redness), and hummer (piezoelectric ceramic piece) damages, and being bound to can not sound and light alarm.3, power-supply battery exhausts, or integrated circuit (IC) is damaged, and certainly will be able to not export to drive to report to the police.If the electroscope that 4 fail selecting properly relevant voltage grade, certainly will malfunctioning etc. the situation of alarm indication.When starting detection operation, when electrode contact detects the point position that electric power facility high voltage end knob specifies, must cause without electric illusion, directly threaten the personal safety of upkeep operation personnel, become the major safety risks of electrical production.In the urgent need to proposing practical solution.Although by the requirement of " State Grid Corporation of China's electric-power safe instruments preventive trial code ", perform the testing standard of " trigger voltage value, not higher than 40% of rated voltage, is not less than 15% of rated voltage ".But under these standard conditions, galvanoscopic trigger voltage is higher, and sensitivity is on the low side.To put into operation along with interchange UHV (ultra-high voltage) 750kV, 1000kV and above extra-high voltage grid circuit, the continuation of test trigger voltage raises, and sensitivity will reduce thereupon.There is technological deficiency aspect problem.Therefore the factor that high voltage electroscope electron component characteristic changes is being taken into full account, under satisfied " testing regulations " specifies prerequisite, be necessary to carry out technical improvement to such high voltage electroscope, strengthen antijamming capability when it works in non-homogeneous alternating electric field, and ensure its sufficiently high sensitivity.
Utility model content
The purpose of this utility model is to provide a kind of detection accurately and reliably, and structure dexterity is light, the novel high-pressure electroscope that cost is cheap.
A kind of novel high-pressure electroscope, its special feature is: comprise exploring electrode contact, and this exploring electrode contact is connected with audible-visual annunciator by negative logic rejection gate integrated circuit, thus can not report to the police when electricity having been detected detecting without electric alarm; Also comprise direct supply, this direct supply is connected with aforesaid negative logic rejection gate integrated circuit and audible-visual annunciator respectively thus powers.
Wherein exploring electrode contact comprises the first inductance and the first resistance that are cascaded, this first resistance is also connected with the emitter of this first triode by the second resistance while being connected with the base stage of the first triode, and the collector of this first triode is as signal output part.
Wherein negative logic rejection gate integrated circuit comprises the controlled oscillator be made up of 42 input forward rejection gates, outer meeting resistance and external capacitor, thus can rectangular wave be exported, the input end of this controlled oscillator is connected with the collector of the first triode and it exports termination audible-visual annunciator.
Wherein audible-visual annunciator comprises the complementary push-pull power amplification circuit be made up of two symmetrical power switch pipes, and this complementary push-pull power amplification circuit is connected with piezoelectric ceramic piece and light emitting diode respectively.
Wherein also comprise test button circuit, the input end of this test button circuit is connected with direct supply and its output terminal is connected with audible-visual annunciator.
The utility model belongs to multi-purpose, portable power-frequency high voltage electroscope, achieves detection accurately and reliably, and structure dexterity is light, and cost is cheap, the feasible simple effect of method.And tool has the following advantages: 1, adopt negative logic low level trigging control, the dual display of sound and light alarm, accomplishes electric-power safe instruments Essential Safety, guarantees that Site Detection is safe and reliable.2, detect whether with power frequency high voltage voltage on transmission line of alternation current and power equipment, and easy to carry, be applicable to field condition operation.3, self-checking function: this electroscope warning circuit is in continuous monitor state, if sound and light signal normally just has self-checking function.
Accompanying drawing explanation
Accompanying drawing 1 is theory diagram of the present utility model;
Accompanying drawing 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, 2, the utility model relates to a kind of novel high-pressure electroscope, comprise exploring electrode contact, this exploring electrode contact is connected with audible-visual annunciator by negative logic rejection gate integrated circuit, thus can not report to the police when electricity having been detected detecting without electric alarm; Also comprise direct supply, this direct supply is connected with aforesaid negative logic rejection gate integrated circuit and audible-visual annunciator respectively thus powers.
Wherein exploring electrode contact comprises the first inductance L 1 and the first resistance R1 be cascaded, this first resistance R1 is also connected with the emitter of this first triode T1 by the second resistance R2 while being connected with the base stage of the first triode T1, and the collector of this first triode T1 is as signal output part.
Wherein negative logic rejection gate integrated circuit (IC) comprises the controlled oscillator be made up of 42 input forward rejection gates, outer meeting resistance and external capacitor, thus can rectangular wave be exported, the input end of this controlled oscillator is connected with the collector of the first triode T1 and it exports termination audible-visual annunciator.
Wherein audible-visual annunciator uses triode T1 and T2 of two complementary types to form push-pull type power amplification circuit, is connected respectively with piezoelectric ceramic piece and light emitting diode.Also comprise test button circuit in addition, this input end is connected with direct supply and its output terminal is connected with audible-visual annunciator, thus the use of conduct test.
Embodiment 1:
Be described in detail with regard to the utility model below:
1 theory diagram sets forth the high voltage electroscope principle improved by reference to the accompanying drawings: when exploring electrode contact touches electric power facility high voltage end knob, input high level (or low level), be connected to negative logic rejection gate integrated circuit and export low level (or high level), drive audible-visual annunciator (or not alert operation).Battery case provides working power.
2 pairs of the utility model illustrate high voltage detection alarm device principle of work by reference to the accompanying drawings: adopt CMOS 42 to input forward rejection gate (IC) CC4001 (D) integrated circuit, form negative logic low level trigging control, that is: " without (low pressure; output is 1) during electricity, must report to the police; When having an electricity (high pressure, output is 0), do not report to the police.
2 pairs of the utility model illustrate the operating process of high voltage detection alarm device by reference to the accompanying drawings:
The integrity of the utility model high voltage electroscope must be checked before using.First by cell switch button AN1 manual closing, then press test button AN2 and carry out electroscope certificate authenticity.Collector resistance R3 and collector resistance R4 is series connection dividing potential drop, and ensure that forward bias is become in transmitting, current collection becomes reverse bias.The current signal of change can be changed into the voltage signal of change simultaneously, input to 8. pin and the 9. pin of rejection gate IC) (current-limiting resistance R5 ensures the current amplitude when test button AN2 short circuit, avoids rejection gate IC to damage; Effect that capacitor C1 plays " every straight-through friendship ", Isolation input-output contacts with circuit direct, can make AC signal successfully input-output channel simultaneously).Now namely the Vss of 42 inputs forward rejection gate ICCC4001 (D) holds 7. pin ground connection (common port), input end 8. pin and 9. pin become high level, 10. pin output low level, pin and (13) pin input end become low level, (11) pin exports high level, 5. pin input high level, then 4. pin exports as low level state.The controlled oscillator that 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and the second capacitor C2 and two other rejection gate form is triggered starting of oscillation.Rectangular wave is exported at 3. pin.Alternate conduction and cut-off in turn under the control of external excitation square-wave signal, control the second triode T2, the 3rd triode T3 Discontinuous Conduction in turn, drive piezoelectric ceramic piece Y1 and two LED 1 of connecting, LED2 (two light emitting diodes are redness).Be placed on two sides on scalable insulating bar top respectively, be beneficial to the emitting red light clearly observing LED and normally work.
Current-limiting resistance R9 ensures that the current amplitude of LED 1 and LED2 is avoided burning out, the current-limiting resistance R10 of auxiliary circuit and resistance R11 ensures the current amplitude of piezoelectric ceramic piece Y1, avoid damaging because electric current is excessive, inductor L2 plays " afterflow coil " effect, the square-wave signal forward position of restriction push-pull type power amplification circuit to rise or afterwards along the steepness of decline wave amplitude, solve when two recommend pipe rotation work start and end of a period node when, occur that output signal can not be connected very well and cause serious distortion problem.Discontinuous Conduction sends sound and light signal and reports to the police.Because electroscope is in close on high-voltage state, prove that its performance is normally intact.
Then electrical verification operation is carried out.When exploring electrode contact is from far near step by step gradually near electric power facility high voltage end knob, until when touching the measuring point of regulation, by the first resistance R1, first inductance (L1) L1 series circuit and the first triode (T1) T1 form and respond to detection resources, cause the first triode (T1) T1 conducting so make 42 input forward rejection gate (IC) CC4001 (D) input ends 8. pin and 9. pin become low level, 10. pin exports high level, pin and (13) pin input end be high level, (11) pin output low level, 5. pin input low level, then 4. pin exports as high level state.Triode T2 and T3 is conduction and cut-off state in turn, when namely normally working, only has a conducting at every turn.High voltage detection alarm device is transformed to shutoff (cut-off) state by conducting state, stops sound and light signal reporting to the police.
The function and characteristic of the utility model embodiment 1:
1, adopt negative logic low level trigging control, the dual display of sound and light alarm, accomplishes electric-power safe instruments Essential Safety, guarantees that Site Detection is safe and reliable.
2, detect whether with power-frequency voltage on HVAC power transmission line and power equipment, and multi-usage, multi-functional, be convenient for carrying, be applicable to field condition operation.
3, self-checking function: this electroscope warning circuit is in continuous monitor state, if sound and light signal normally just has self-checking function.
High voltage detection alarm device operating voltage 9V of the present utility model, is powered by 6 CSR44 button cells.Circuit static electric current≤11 μ A, serviceable life about 5000 times.
The key technical indexes:
1, grade of rated voltage is suitable for: 110kV, 220kV, 330kV;
2, frequency of operation: 50Hz;
3, Applicable temperature :-25 DEG C ~+65 DEG C;
4, relative humidity :≤90%;
5, height above sea level: 2000 meters and following;
6, flashing light alarm effect: high brightness intense flash, clear and legible within 6 meters;
7, flashing rate: 40 ~ 60 times/min (adjustable);
8, audio gain: >=80dB (adjustable);
9, use occasion: indoor, outdoor, without rainy day gas;
10, physical dimension: Φ 60 × 1000mm;
11, trigger voltage Ut:15%U is tested
ф≤ Ut≤40%U
ф(wherein U
фrepresent specified phase voltage), meet the requirement of " State Grid Corporation of China's managing security tools and instruments administrative provisions " and " electric-power safe instruments preventive trial code ".
This high voltage electroscope meets " high voltage display device technical conditions (DL/T538-2006) " and the composite request of " condensing type electroscope (DL740-2000) " relevant technologies index.
The part that the present embodiment does not describe is identical with existing routine techniques means.
Claims (5)
1. a novel high-pressure electroscope, is characterized in that: comprise exploring electrode contact, and this exploring electrode contact is connected with audible-visual annunciator by negative logic rejection gate integrated circuit, thus can not report to the police when electricity having been detected detecting without electric alarm; Also comprise direct supply, this direct supply is connected with aforesaid negative logic rejection gate integrated circuit and audible-visual annunciator respectively thus powers.
2. a kind of novel high-pressure electroscope as claimed in claim 1, it is characterized in that: wherein exploring electrode contact comprises the first inductance (L1) and the first resistance (R1) that are cascaded, this first resistance (R1) is also connected with the emitter of this first triode (T1) by the second resistance (R2) while being connected with the base stage of the first triode (T1), and the collector of this first triode (T1) is as signal output part.
3. a kind of novel high-pressure electroscope as claimed in claim 2, it is characterized in that: wherein negative logic rejection gate integrated circuit (IC) comprises the controlled oscillator be made up of 42 input forward rejection gates, outer meeting resistance and external capacitor, thus can rectangular wave be exported, the input end of this controlled oscillator is connected with the collector of the first triode (T1) and it exports termination audible-visual annunciator.
4. a kind of novel high-pressure electroscope as claimed in claim 1, it is characterized in that: wherein audible-visual annunciator comprises the complementary push-pull power amplification circuit be made up of two symmetrical power switch pipes, and this complementary push-pull power amplification circuit is connected with piezoelectric ceramic piece and light emitting diode respectively.
5. as a kind of novel high-pressure electroscope in Claims 1-4 as described in any one, it is characterized in that: wherein also comprise test button circuit, the input end of this test button circuit is connected with direct supply and its output terminal is connected with audible-visual annunciator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520642674.1U CN205193145U (en) | 2015-08-24 | 2015-08-24 | Novel high -voltage electroscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520642674.1U CN205193145U (en) | 2015-08-24 | 2015-08-24 | Novel high -voltage electroscope |
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| CN205193145U true CN205193145U (en) | 2016-04-27 |
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| CN201520642674.1U Expired - Fee Related CN205193145U (en) | 2015-08-24 | 2015-08-24 | Novel high -voltage electroscope |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158548A (en) * | 2015-08-24 | 2015-12-16 | 国家电网公司 | Novel high-voltage electroscope |
| CN106878301A (en) * | 2017-02-13 | 2017-06-20 | 国网江西省电力公司信息通信分公司 | A kind of detection method and system of senior sustainable threat |
| CN114019342A (en) * | 2022-01-05 | 2022-02-08 | 深圳佑驾创新科技有限公司 | Passive crystal oscillator test circuit |
-
2015
- 2015-08-24 CN CN201520642674.1U patent/CN205193145U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158548A (en) * | 2015-08-24 | 2015-12-16 | 国家电网公司 | Novel high-voltage electroscope |
| CN106878301A (en) * | 2017-02-13 | 2017-06-20 | 国网江西省电力公司信息通信分公司 | A kind of detection method and system of senior sustainable threat |
| CN114019342A (en) * | 2022-01-05 | 2022-02-08 | 深圳佑驾创新科技有限公司 | Passive crystal oscillator test circuit |
| CN114019342B (en) * | 2022-01-05 | 2022-04-05 | 深圳佑驾创新科技有限公司 | Passive crystal oscillator test circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20190824 |