CN2439030Y

CN2439030Y - Micro-electronic insulator zero-detection device

Info

Publication number: CN2439030Y
Application number: CN 00250734
Authority: CN
Inventors: 方冬青
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-25
Filing date: 2000-08-25
Publication date: 2001-07-11
Anticipated expiration: 2010-08-25

Abstract

The utility model relates to a micro-electronic insulating zero-detection device, which comprises a zero-detection device body, an insulating bracket, a probe and a circuit board in the zero-detection device body, wherein, the probe is fixed on the insulating bracket, the circuit board in the zero-detection device body is provided with a power source, a photoelectric conversion circuit, an oscillating circuit, an amplifying circuit and an output device, and the probe is communicated with the signal input end of the photoelectric conversion circuit. The utility model has the advantages of simple structure, light weight, small size and high anti-interference ability, test steering angle can be freely adjusted, test method is simple with high precision, and reliable proof is provided for seeking zero resistance insulators.

Description

Microelectronics insulator null detector

The utility model relates to a kind of microelectronics insulator null detector, more particularly, relates to the zero resistance insulator detection device in the suspended porcelain insulator string of electric system overhead transmission line.

Suspended porcelain insulator string on the overhead transmission line owing to being struck by lightning or other factors can cause the voltage vanishing at certain sheet insulator two ends wherein to become zero resistance insulator, can not play insulating effect under high-tension electricity in the long-time running fully.The appearance of zero resistance insulator can make the voltage drop at other sub-two ends of normal insulation increase, and is easy to take place suspended porcelain insulator string flashover under the effect of atmospheric over-voltage or switching overvoltage, makes the transmission line of electricity fault that is short-circuited.For this reason, relevant rules regulation should regularly detect the insulator resistance of porcelain insulating substring, in time detects and change zero resistance insulator.Present way roughly has: the short circuit fork, and good insulator can be heard the sound of whip with the short circuit fork, but has hum just to be beyond recognition slightly, accuracy is low; Sparking distance detects, and utilizes the gap to see electric discharge phenomena, but still deposits under the situation of high light, be difficult to confirm, and discharging gap is difficult for accurately locating with the insulator sheet of being tested; Megohmmeter, this need just can carry out after having a power failure; Infrared detection, this utensil can only be effective to low resistance insulator, and zero resistance insulator can't solve.In addition, though the existing precedent of utilizing development zero resistance insulator ground detection such as radiotelegraphy, infrared technology in home and abroad, technical sophistication, measurement accuracy are low, poor practicability, cost height, are unfavorable for applying.

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, provide a kind of simple in structure, in light weight, volume is little, antijamming capability is strong, detecting steering angle adjusts arbitrarily, test zero resistance insulator accuracy height, have the zero resistance insulator detecting device that operating personnel go up the shaft tower one man operation of being convenient to of sound, phototiming indication, increase substantially detection efficiency.

The microelectronics insulator null detector that the utility model provides, comprise null detector body, insulating support, probe, the intrinsic circuit board of null detector, probe stationary is on insulating support, be equipped with on the circuit board in the null detector: power supply, photoelectric switching circuit, oscillatory circuit, amplifying circuit and output unit, the signal input part electric connection of probe and photoelectric switching circuit.

The utility model has the advantages that: the null detector bulk volume is little, inner structure is simple, probe is connected with the null detector body by universal working head, test angle can be adjusted arbitrarily, be very easy to block the steel cap at insulator two ends, the work display surface is by sound, light is represented whether null value of insulator, intuitively, the accuracy height, easy to operate, method of testing is simple, provide reliable basis for searching zero resistance insulator, avoid because the existence of zero resistance insulator causes power transmission network to have a power failure and to the tremendous economic loss that national economy is brought, improves the power system power supply reliability, security is so have very big economic and social benefit.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1, the utility model microelectronics insulator null detector one-piece construction synoptic diagram;

The A of Fig. 2, work display panel is to view;

The theory diagram of Fig. 3, the intrinsic circuit board of null detector;

The circuit diagram of Fig. 4, the intrinsic circuit board of null detector.

See microelectronics insulator null detector shown in Figure 1, it comprises the circuit board in null detector body (1), insulating support (3), probe (4) and the null detector body (1), probe (4) is fixed on the insulating support (3), on the circuit board in the null detector body (1) power supply (13), photoelectric switching circuit (8), oscillatory circuit (9), amplifying circuit (10) and output unit (11) are housed, signal input part (7) electric connection of probe (4) and photoelectric switching circuit (8).

Be connected by the universal working head (2) that is located at null detector body (1) upper end between insulating support (3) and the null detector body (1), the probe (4) that is fixed on the insulating support (3) is used to block the steel cap at insulator to be measured two ends, because the effect of universal working head (2), the detection angles of probe (4) can be adjusted arbitrarily, make probe (4) be very easy to block the steel cap at insulator two ends, there is an insulating bar joint (5) lower end of null detector body (1), insulating bar (6) is connected with null detector body (1) by insulating bar joint (5), insulating bar (6) is used for guaranteeing operating personnel's safety and safe distance, and whole zero-detection proving installation is light, small and exquisite, be convenient to operating personnel and go up the shaft tower one man operation.

See the circuit diagram of the circuit board in the null detector body (1) shown in Figure 4, photoelectric switching circuit (8) is made up of neon bulb Lp, photoresistance Rcds, resistance R 5, R6, R7, capacitor C 2, triode VT1; Oscillatory circuit (9) is to adopt 4093 integrated circuit; Output unit (11) is made of light-emitting component LED and sounding component hummer; Self-checking circuit (12) is composed in series by self-test switch K, resistance R 1, R2, stabilivolt D1.During work, as long as press self-test switch K, circuit just begins self check work.

Theory diagram and circuit diagram in conjunction with the circuit board in Fig. 3 and the null detector body shown in Figure 4 (1), the course of work of the present utility model is: two termination probes (4) of signal input part (7), after probe (4) blocks the steel cap at insulator two ends, if insulator work is normal, then the potential difference (PD) of insulator two ends existence makes neon bulb Lp luminous by probe (4), irradiate light is to photoresistance Rcds, the resistance of photoresistance is reduced, the conducting VT1 thereby triode VT1 base voltage descends, make the VT1 collector potential become 1 by 0, through two not gates, enter oscillatory circuit (9), the sinusoidal wave current potential that makes oscillatory circuit (9) produce is raised, the triode VT2 that passes through amplifying circuit (10) again amplifies, the hummer sounding in the output unit (11), and LED is luminous, the staff can receive sound by work display panel (101), light signal shows that insulator work is normal.Otherwise, then noiseless unglazed if the insulator resistance is zero, can judge that thus detected is zero resistance insulator.

The A that sees work display panel (101) shown in Figure 2 is to view, connect in it comprises output unit (11) go up the pronunciation chamber (102) of sounding component hummer, in connect output unit (11) go up the luminous indicating lamp (103) of light-emitting component LED, in connect the self check button (104) that self-checking circuit (12) is gone up self-test switch K, whether insulator null value, just judge by the working condition here, easy, directly perceived, antijamming capability is strong.

Above-mentioned several embodiment is only for the usefulness that the utility model is described; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1, a kind of microelectronics insulator null detector, it comprises the circuit board in null detector body (1), insulating support (3), probe (4) and the null detector body (1), it is characterized in that: probe (4) is fixed on the insulating support (3), on the circuit board in the null detector body (1) power supply (13), photoelectric switching circuit (8), oscillatory circuit (9), amplifying circuit (10) and output unit (11) are housed, signal input part (7) electric connection of probe (4) and photoelectric switching circuit (8).

2, microelectronics insulator null detector according to claim 1 is characterized in that: be connected by the universal working head (2) that is located at null detector body (1) upper end between insulating support (3) and the null detector body (1).

3, microelectronics insulator null detector according to claim 1, it is characterized in that: there is an insulating bar joint (5) lower end of null detector body (1), and insulating bar (6) is connected with null detector body (1) by insulating bar joint (5).

4, microelectronics insulator null detector according to claim 1, it is characterized in that: photoelectric switching circuit (8) is made up of neon bulb Lp, photoresistance Rcds, resistance R 5, R6, R7, capacitor C 2, triode VT1.

5, microelectronics insulator null detector according to claim 1 is characterized in that: oscillatory circuit (9) adopts 4093 integrated circuit.

6, microelectronics insulator null detector according to claim 1, it is characterized in that: output unit (11) is to be made of light-emitting component and/or sounding component.

7, microelectronics insulator null detector according to claim 1 is characterized in that: the circuit board two ends in null detector body (1), the self-checking circuit (12) by self-test switch K, resistance R 1, R2, stabilivolt D1 serial connection is housed.

8, microelectronics insulator null detector according to claim 1, it is characterized in that: a work display panel (101) is equipped with in null detector body (1) lower end, and it comprises: in connect output unit (11) go up the pronunciation chamber (102) of sounding component, in connect output unit (11) go up the luminous indicating lamp (103) of light-emitting component, in connect the self check button (104) that self-checking circuit (12) is gone up self-test switch K.