CN103698406A - Probe and method for ultrasonic online multi-point detection of insulator - Google Patents

Abstract

The invention provides a probe for ultrasonic online multi-point detection of an insulator. The probe comprises a climbing probe, a straight probe and a transverse wave angle probe, which are sequentially arranged side by side, and the contact surfaces of the three probes are circular arc-shaped. The detection method comprises the following steps: a. the probe is coupled with an insulator to be detected by ultrasonic solid coupling gel; b. the probe emits ultrasonic waves to the insulator to be detected; c. reflected waves when the ultrasonic waves enter the insulator to be detected and penetrate through the insulator to be detected are detected to limit the position section of the insulator; d. a detector receives oscillograms of the reflected waves, when the insulator to be detected generates a defect, a defect wave of the defect occurs on the time axis of the received reflected wave, a signal is transmitted to the detector, and the detector transmits data to a ground server terminal through a wireless data transmission module and displays the data on a display screen of the server terminal; e. the length of the defect is determined according to the size and position of the defect wave of the detected oscillogram. The probe provided by the invention is used for solving the problems of attenuation and real-time accuracy and can react at the first time.

Description

Probe and method that the online multiple spot of a kind of insulator ultrasound wave detects

Technical field

The present invention relates to probe and method that the online multiple spot of a kind of insulator ultrasound wave detects.

Background technology

Insulator is the important composition equipment of generating plant and substation operation, plays a part support wire and insulation, and its duty directly affects mains supply safety.Because insulator is extremely low without intrinsic deformation and toughness, most of porcelain insulators bear the boisterous impacts such as mechanical load in operation of power networks and wind and snow Exposure to Sunlight for a long time, its extra-stress is increased and concentrate, cause inherent vice to expand rapidly, very easily cause porcelain insulator brittle fracture, cause electrical network major accident.

Because China's electrical network exists power transmission and transforming equipment old, equipment has not been transformed, resist the problems such as multiple accident ability, power transmission and transforming equipment culprit is not clear still to be existed, one of them major issue is insulator arc-over, supporting insulator unknown cause fracture etc., and current Faulty Insulator Detection Method still can not meet actual needs completely.

Traditional insulator measuring method has: infra-red method, ultraviolet method etc.Infrared ray method of testing is to observe the temperature at each position of insulator detect the insulation degree of insulator by infrared equipment, because operating insulator can generate heat, when normal, heating is more uniform, when insulator dielectric hydraulic performance decline, trouble location will cause serious heating, make local temperature too high, the method is easier to find to the failure ratio of insulator upper end, but is not easy to detect for the mechanical fault of flange attachment.

Ultraviolet and ultrared method is similar, but it is to utilize the electric field intensity of insulator each several part to realize fault detect, and same, its shortcoming is to realize the detection of insulator flange place internal mechanical fault, or detects poor effect.

Therefore, traditional infrared ray, ultraviolet method of testing are easily subject to the impact of the factors such as pollution level, load, detection position, angle of radiation, direction, distance, weather, Atmospheric Absorption and instrument of edge sub-surface, cannot utilize effective voltage to detect porcelain insulator, cannot become the independently lossless detection method of insulator and sleeve pipe.

Summary of the invention

The present invention proposes the online multiple spot detection method of a kind of insulator ultrasound wave, solved a difficult problem for coupling, decay and the remote remote measurement of detection method of Novel couplant, the defect of effective and real-time judgement insulator inside changes, can the very first time to staff's response situation.

Technical scheme of the present invention is achieved in that

The probe that the online multiple spot of insulator ultrasound wave detects, comprise the climbing probe, normal probe and the transverse wave double-bevel detector that are set up in parallel successively, and the surface of contact of three kinds of probes is all circular arc.

Further, 80 °～87 ° of the velocity of wave angles of described climbing probe, 0 °～8 ° of the velocity of wave angles of normal probe, 30 °～37 ° of the velocity of wave angles of transverse wave double-bevel detector;

Further, three kinds of probes are connected to multichannel ultrasonic tester;

Further, described multichannel ultrasonic tester is lithium rechargeable pond or solar cell for supplying power.

The online multiple spot detection method of a kind of insulator ultrasound wave comprises:

A, adopt the ultrasonic solid coupling glue will probe and insulator coupling to be detected;

B, probe send ultrasound wave to described insulator to be detected;

C, the reflection wave of ultrasound wave when entering into insulator to be detected and passing insulator to be detected detected and limit between the lane place of insulator;

The oscillogram that receives reflection wave of d, detector, when there is defect in insulator to be detected, on the time shaft of the reflection wave receiving, the defect waves of this defect will be there is, signal is transferred to detector, detector transfers data to ground-based server terminal by wireless data transfer module, and is presented at the display screen of server terminal;

E, according to the size and location that the defect waves of oscillogram detected, determine the length of defect.

Preferably, in described step e, adopt 6dB method to calculate the length of defect.

The beneficial effect that the present invention produces is: can judge real-time, accurately, intuitively the defect of insulator inside, react the very first time, and need not repeatedly change probe for staff, reduce working strength.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Side cross-sectional, view when Fig. 1 is coupled insulator for probe;

Top cross-sectional view when Fig. 2 is coupled insulator for probe.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

As shown in Fig. 1～2, the probe that the online multiple spot of a kind of insulator ultrasound wave detects, comprise the climbing probe 103, normal probe 102 and the transverse wave double-bevel detector 101 that are set up in parallel successively, and the surface of contact of three kinds of probes is all circular arc, the surface of contact that guarantees probe can coincide with insulator 2 surfaces, effect at coupling glue is issued to the effect of coupling completely, improves the accuracy of ultrasound examination.

The velocity of wave angle of climbing probe 103 is controlled to 80 °～87 °, 0 °～8 ° of the velocity of wave angles of normal probe 102,30 °～37 ° of the velocity of wave angles of transverse wave double-bevel detector 101, three kinds of probes when probe fits like a glove on insulator, because three kinds of probes are arranged side by side, angle is in the vertical direction the same, but velocity of wave angle is different, can reach ultrasound wave that three kinds of probes the send whole root of scanning insulator completely, while avoiding the single probe test of existing use, will change the problem of probe.

Above-mentioned three kinds of probes are all connected to multichannel ultrasonic tester, as connect ZXUD series insulator special multichannel on-line testing instrument, when running into while having defects i.e.cracks, climbing ripple can be reflected back, by signal conversion, be sent to instrument, multichannel ultrasonic tester transfers data to ground-based server terminal by wireless data transfer module, and be presented at the display screen of server terminal, on display screen, having independently flaw echo shows, by optical viewer, just can carry out at an easy rate the Non-Destructive Testing to insulator, this method is except overcoming the deficiency of above method, great advantage is simple, intuitively, effectively, avoid directly connecing the ill effect that electricity produces, guarantee the safety of tester and testing apparatus.Simultaneously multichannel ultrasonic tester is lithium rechargeable pond or solar cell for supplying power, easily the test job in the lower or place that can not directly power.

The online multiple spot detection method of insulator ultrasound wave, comprising:

A, adopt ultrasonic solid coupling glue by probe 1 and insulator 2 couplings to be detected;

B, probe send ultrasound wave to described insulator to be detected;

C, the reflection wave of ultrasound wave when entering into insulator to be detected 2 and passing insulator 2 to be detected detected and limit between the lane place of insulator;

, when defect appears in insulator to be detected, will there is the defect waves of this defect in the oscillogram that receives reflection wave of d, detector, signal is transferred to detector, and is presented at instrument display screen on the time shaft of the reflection wave receiving;

E, according to the size and location that the defect waves of oscillogram detected, determine the length of defect.

Wherein in step e, adopt the length of 6dB method test defect, adopt probe of the present invention and detection method, the decay of existing probe can be avoided and the object of insulator inherent vice can not be accurately detected in real time, need to repeatedly change probe, repeated detection, very inconvenient for remote remote measurement like this, therefore the present invention can effectively judge the defect of insulator inside in real time, and the very first time reacts, and has reduced working strength.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. the probe that the online multiple spot of insulator ultrasound wave detects, is characterized in that, comprise the climbing probe, normal probe and the transverse wave double-bevel detector that are set up in parallel successively, and the surface of contact of three kinds of probes is all circular arc.

2. the probe that the online multiple spot of a kind of insulator ultrasound wave as claimed in claim 1 detects, is characterized in that, 80 °～87 ° of the velocity of wave angles of described climbing probe, 0 °～8 ° of the velocity of wave angles of normal probe, 30 °～37 ° of the velocity of wave angles of transverse wave double-bevel detector.

3. the probe that the online multiple spot of a kind of insulator ultrasound wave as claimed in claim 1 detects, is characterized in that, three kinds of probes are connected to multichannel ultrasonic tester.

4. the probe that the online multiple spot of a kind of insulator ultrasound wave as claimed in claim 3 detects, is characterized in that, described multichannel ultrasonic tester is lithium rechargeable pond or solar cell for supplying power.

5. the online multiple spot detection method of a kind of insulator ultrasound wave of utilizing above-mentioned probe, is characterized in that, comprising:

A, adopt the ultrasonic solid coupling glue will probe and insulator coupling to be detected;

B, probe send ultrasound wave to described insulator to be detected;

C, the reflection wave of ultrasound wave when entering into insulator to be detected and passing insulator to be detected detected and limit between the lane place of insulator;

The oscillogram that receives reflection wave of d, detector, when there is defect in insulator to be detected, on the time shaft of the reflection wave receiving, the defect waves of this defect will be there is, signal is transferred to detector, detector transfers data to ground-based server terminal by wireless data transfer module, and is presented at the display screen of server terminal;

E, according to the size and location that the defect waves of oscillogram detected, determine the length of defect.

6. the online multiple spot detection method of a kind of insulator ultrasound wave as claimed in claim 5, is characterized in that, adopts 6dB method to calculate the length of defect in described step e.

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