CN204595149U - Cable electroacoustic integral type partial discharge location sensor - Google Patents

Abstract

The utility model relates to a cable electroacoustic integrated partial discharge positioning sensor. The technical proposal is: one end of the shell is used to fix an output joint, a photoelectric conversion module and a switch, and the other side is used to fix a protective cover, and an ultrasonic vibrator is embedded in the protective cover. Internally, the external of the ultrasonic vibrator is connected to the ultrasonic signal collector, the internal of the ultrasonic vibrator is connected to the ultrasonic signal circuit board, the ultrasonic vibrator is used to receive ultrasonic signals, the ultrasonic signal circuit board is connected to the electrical signal circuit board, and the electrical signal circuit board is connected to the output connector and photoelectric conversion In the module, the extension rod is connected with the threaded hole at the rear end of the shell through the front bolt, the light emitting diode is welded on the electrical signal circuit board, the light emitting diode is fixed on both sides of the switch, and the light emitting diode is used to indicate whether the circuit board is working normally; the beneficial effect of the utility model Yes: improve the effective accuracy of ultrasonic detection, convert electrical signals into optical signal output, ensure the accuracy and reliability of transmitted signals, and improve the accuracy of detection.

Description

Cable electroacoustic integrated partial discharge positioning sensor

technical field

The utility model relates to the field of sensor detection, in particular to a cable electroacoustic integrated partial discharge positioning sensor.

Background technique

Partial discharge is a strong field effect in the insulating medium. Long-term partial discharge will lead to aging and breakdown of the insulating medium. In severe cases, it may even cause the explosion of large-scale power equipment, bringing great losses to the people of the country. Ultrasonic method and ultra-high frequency method are important methods for partial discharge detection of power equipment, because ultrasonic waves have no connection with the electrical circuit of power equipment, are not affected by electrical interference, can locate the discharge position, and can be charged for detection, etc. Make it more and more important in practical application. High-voltage electrical equipment will form a high-voltage electromagnetic field near the high-voltage line. When partial discharge occurs, the electromagnetic field near the discharge site will be affected accordingly. The partial discharge of high-voltage electrical equipment can be effectively detected by detecting the change of the electromagnetic field near the high-voltage electrical equipment. .

In the field of partial discharge detection, ultrasonic waves are widely used in on-site detection because they are not affected by on-site electrical appliances, but the existing ultrasonic partial discharge sensors only have ultrasonic detection functions alone. It is impossible to effectively and accurately judge the connection between the detected signal and the electrical equipment on site. At the same time, the electromagnetic interference phenomenon in some sites is very serious. Ordinary electromagnetic wave sensors cannot work at all, or because the output of the sensor is an electrical signal, after the cable The accuracy and reliability of the signal are seriously affected.

Contents of the invention

The purpose of this utility model is to provide a cable electroacoustic integrated partial discharge positioning sensor for the above-mentioned defects in the prior art, which ensures the accuracy and reliability of the transmitted signal and improves the detection accuracy.

Its technical solution is: including shell, protective cover, ultrasonic signal collector, ultrasonic vibrator, ultrasonic signal circuit board, electrical signal circuit board, output connector, photoelectric conversion module, switch, light emitting diode, battery box, extension rod, the top of the shell , There is a fixing groove at the bottom, and there are fixing holes on the side of the shell. There are four cavities inside the shell. The four cavities of the shell are respectively used to put the ultrasonic signal circuit board, the electric signal circuit board and the battery box, the shell and the ultrasonic signal. The circuit board and the electrical signal circuit board are fixed to each other through the corresponding connection holes. One end of the shell is used to fix the output connector, photoelectric conversion module, and switch, and the other side is used to fix the protective cover. The ultrasonic vibrator is embedded in the protective cover. The external connection of the ultrasonic vibrator Ultrasonic signal collector, the internal connection of the ultrasonic vibrator to the ultrasonic signal circuit board, the ultrasonic vibrator is used to receive ultrasonic signals, the ultrasonic signal circuit board is connected to the electrical signal circuit board, the electrical signal circuit board is connected to the output joint and the photoelectric conversion module, and the extension rod passes through the front bolt It is connected with the threaded hole at the rear end of the shell, the light emitting diode is welded on the electrical signal circuit board, the light emitting diode is fixed on both sides of the switch, and the light emitting diode is used to indicate whether the circuit board is working normally.

The exterior of the above-mentioned housing is provided with an aluminum shell cover, which is used for shielding signals and preventing interference.

The above-mentioned ultrasonic signal collector has a trumpet-shaped structure, and the diameter of the inlet at the outer end of the ultrasonic signal collector is larger than the diameter of the outlet at the inner end.

The beneficial effects of the utility model are: improving the effective accuracy of ultrasonic detection, avoiding electromagnetic interference on the job site, converting electrical signals into optical signal output, ensuring the accuracy and reliability of transmitted signals, and improving the accuracy of detection .

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the internal structure schematic diagram of the present utility model;

In the above figure: shell 1, protective cover 2, aluminum shell cover 3, ultrasonic signal collector 4, ultrasonic vibrator 5, ultrasonic signal circuit board 6, electrical signal circuit board 7, output connector 8, photoelectric conversion module 9, switch 10, Light emitting diode 11, battery case 12, extension rod 13.

Detailed ways

In conjunction with accompanying drawings 1-2, the utility model is further described:

The utility model includes a shell 1, a protective cover 2, an aluminum shell cover 3, an ultrasonic signal collector 4, an ultrasonic vibrator 5, an ultrasonic signal circuit board 6, an electrical signal circuit board 7, an output joint 8, a photoelectric conversion module 9, a switch 10, Light-emitting diode 11, battery box 12, extension rod 13, there are fixing grooves on the top and bottom of the casing 1, fixing holes are on the side of the casing 1, there are four cavities inside the casing 1, and the four cavities of the casing 1 are respectively used The ultrasonic signal circuit board 4, the electrical signal circuit board 7 and the battery box 12, the housing 1, the ultrasonic signal circuit board 4, and the electrical signal circuit board 7 are fixed to each other through corresponding holes, and one end of the housing 1 is used to fix the output connector 8, Photoelectric conversion module 9, switch 10, the other side is used to fix the protective cover 2, the ultrasonic vibrator 5 is embedded inside the protective cover 2, the external of the ultrasonic vibrator 5 is connected to the ultrasonic signal collector 4, and the internal of the ultrasonic vibrator 5 is connected to the ultrasonic signal circuit board 6 , the ultrasonic vibrator 5 is used to receive ultrasonic signals, the ultrasonic signal circuit board 6 is connected to the electrical signal circuit board 7, the electrical signal circuit board 7 is connected to the output joint 8 and the photoelectric conversion module 9, and the extension rod 13 passes through the front bolt and the threaded hole at the rear end of the housing 1 connected, the light emitting diode 11 is welded on the electric signal circuit board 7, the light emitting diode 11 is fixed on both sides of the switch 10, and the light emitting diode 11 is used to indicate whether the circuit board is working normally.

Wherein, an aluminum shell cover 3 is provided outside the shell for shielding signals and preventing interference.

In addition, the ultrasonic signal collector 4 has a trumpet-shaped structure, and the diameter of the inlet at the outer end of the ultrasonic signal collector 4 is larger than the diameter of the outlet at the inner end.

Working principle: Turn on the switch, the ultrasonic signal collector 4 concentrates the ultrasonic signal in a wide range to the ultrasonic vibrator 5, converts the acoustic signal into an electrical signal through the ultrasonic vibrator 5 and directly transmits it to the electrical signal circuit board 7, and the electrical signal is transmitted through the transmission line The electrical signal circuit board 7 is processed by the electrical signal circuit board 7 for noise reduction, amplification, and filtering, and finally the electrical signal is converted into an optical signal by the photoelectric conversion module 9 for output. The design of the extension rod is easy to disassemble, and the extension rod can ensure a safe distance between the inspector and the high-voltage electrical equipment, which is convenient for the inspector to use in areas that are out of reach or more dangerous.

The beneficial effects of the utility model are: improving the effective accuracy of ultrasonic detection, avoiding electromagnetic interference on the job site, converting electrical signals into optical signal output, ensuring the accuracy and reliability of transmitted signals, and improving the accuracy of detection .

Claims (3)

1. a cable electroacoustic integral type partial discharge location sensor, is characterized in that: comprise shell (1), protective cover (2), ultrasonic signal gatherer (4), ultrasonic vibrator (5), ultrasonic signal circuit board (6), electrical signal circuitry plate (7), out splice going splice (8), photoelectric conversion module (9), switch (10), light emitting diode (11), battery case (12), extension rod (13), the top of shell (1), fixed groove is arranged at bottom, and there is fixed orifice the side of shell (1), and there are four cavitys the inside of shell (1), is respectively used to put ultrasonic signal circuit board (4) in four cavitys of shell (1), electrical signal circuitry plate (7) and battery case (12), shell (1) and ultrasonic signal circuit board (4), electrical signal circuitry plate (7) connects hole by correspondence and interfixes, and one end of shell (1) is used for fixing out splice going splice (8), photoelectric conversion module (9), switch (10), opposite side is used for fixing protective cover (2), it is inner that ultrasonic vibrator (5) embeds protective cover (2), the outside of ultrasonic vibrator (5) connects ultrasonic signal gatherer (4), the inside of ultrasonic vibrator (5) connects ultrasonic signal circuit board (6), ultrasonic vibrator (5) is for received ultrasonic signal, ultrasonic signal circuit board (6) connects electrical signal circuitry plate (7), electrical signal circuitry plate (7) connects out splice going splice (8) and photoelectric conversion module (9), extension rod (13) is connected by the threaded hole of front terminal bolt with shell (1) rear end, light emitting diode (11) is welded on electrical signal circuitry plate (7), and light emitting diode (11) is fixed on the both sides of switch (10).

2. cable electroacoustic integral type partial discharge location sensor according to claim 1, is characterized in that: the outside of described shell (1) is provided with aluminum hull lid (3).

3. cable electroacoustic integral type partial discharge location sensor according to claim 1, is characterized in that: described ultrasonic signal gatherer (4) flare structure, the outer end inlet diameter of ultrasonic signal gatherer (4) is greater than inner outlet diameter.