CN213423382U - Detection device for insulation fault detection of GIL equipment - Google Patents

Abstract

The utility model relates to a detection device for GIL equipment insulation fault detection, which comprises a GIL shell and an acousto-optic integrated sensor for insulation monitoring of the interior of the GIL; the GIL shell is provided with a mounting hole for mounting the acousto-optic integrated sensor, and the acousto-optic integrated sensor is mounted in the mounting hole and sealed through a sealing cover; the acousto-optic integrated sensor is electrically connected with the aviation plug outside the cover plate through the insulator, the device shields external various noise interference, and the attenuation of fault signals is very small, so that the detection is accurate, and the sensitivity is very high.

Description

Detection device for insulation fault detection of GIL equipment

Technical Field

The utility model relates to a GIL equipment detection device, concretely relates to a detection device that is used for insulating fault detection of GIL equipment.

Background

A gas-insulated metal-enclosed transmission line (GIL) is a high-voltage, large-current, long-distance power transmission device which adopts SF6 gas insulation and has a shell and a conductor coaxially arranged. In the transportation and installation process of the GIL equipment, because the process is not tightly controlled, the situations that tiny metal particles are left in the GIL, an insulating part is damaged and the like easily occur. These insulation defects may cause breakdown of the insulation or direct discharge of the inner conductor to the outer shell, thereby causing a GIL device failure.

The most common detection method at present is to detect ultrasonic waves or high-frequency electromagnetic waves leaking from the inside of the case by mounting an ultrasonic sensor or an ultrahigh-frequency sensor on the GIL case, thereby determining whether or not an insulation failure has occurred inside the case. However, this method has the following problems: 1. the transmission distance of the GIL equipment is usually more than several kilometers and dozens of kilometers, and the GIL equipment is easily influenced by interferences such as mechanical vibration, factory noise, external corona and the like when passing through various work areas, so that the detection accuracy of an external ultrasonic sensor and an ultrahigh frequency sensor is easily influenced; 2. SF6 gas with certain pressure is filled in the GIL, so the GIL needs to be totally closed, after ultrasonic waves and high-frequency electromagnetic waves generated by internal insulation fault discharge leak out through the connection part of the GIL, signals become very weak, and external ultrasonic sensors and ultrahigh-frequency sensors are difficult to detect; 3. the GIL itself is a high voltage device, and can generate strong electromagnetic waves, which greatly interferes with high-frequency electromagnetic wave signals generated by insulation fault discharge.

It is therefore highly desirable to design a built-in detection device that solves the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide a detection device that is used for GIL equipment insulation fault to detect.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a detection device for insulation fault detection of GIL equipment comprises a GIL shell and an acousto-optic integrated sensor for carrying out insulation monitoring on the interior of the GIL; the GIL shell is provided with a mounting hole for mounting the acousto-optic integrated sensor, and the acousto-optic integrated sensor is mounted in the mounting hole and sealed through a sealing cover; the acousto-optic integrated sensor is electrically connected with the aviation plug outside the cover plate through the insulator.

The working principle and the beneficial effects are as follows: when the device works, the interior of the GIL is subjected to insulation monitoring through the acousto-optic integrated sensor, compared with the prior art that only one ultrasonic sensor or optical sensor is adopted, interference is less through photoelectric joint judgment, and the detection is more accurate; the acousto-optic integrated sensor is arranged in the GIL shell, ultrasonic waves and optical signals generated in the process of insulation failure can be quickly transmitted to the sensor without penetrating the shell, attenuation is low, and therefore very weak fault discharge can be detected, and sensitivity is high; because two sensors are integrated together, only one wire outlet is needed, thereby reducing the number of signal transmission cables and being simple and convenient to install.

Furthermore, the acousto-optic integrated sensor comprises an ultrasonic sensor, an optical sensor and a flange plate, the ultrasonic sensor and the optical sensor are fixed by the flange plate as a substrate, and the insulator is electrically connected with signal wires of the ultrasonic sensor and the optical sensor respectively. The arrangement can conveniently install the two sensors together to form an acousto-optic integrated sensor, and the two sensors can be conveniently fixed by the flange plate as the substrate, so that the two sensors cannot be easily loosened and fall off.

Further, the flange is made of stainless steel. This setting for the intensity and the anticorrosive effect of ring flange have certain assurance.

Furthermore, a sealing ring is arranged between the cover plate and the flange plate. This setting can be solved and trompil leads to the relatively poor problem of leakproofness on the GIL casing, and the condition of avoiding leaking gas takes place.

Furthermore, the ultrasonic sensor and the optical sensor are symmetrically arranged by taking the insulator as a center, and the insulator is positioned at the circle center of the flange plate. This setting not only makes the structure of whole integrative sensor more balanced symmetry, and two sensors are separated by far away, are difficult to interfere with each other, and it is more convenient to install, can not interfere.

Furthermore, the sealing cover and the GIL shell are directly fixed in a sealing mode through screw connection or clamping connection. By adopting the arrangement, the sealing cover can be conveniently arranged on the mounting hole of the GIL shell, and the mounting hole is sealed.

Further, the optical sensor adopts a wide-angle lens. By adopting the arrangement, the monitoring range of the optical sensor is wider, the signal which is more difficult to detect can be detected, and the detection effect is better.

Furthermore, ultrasonic sensor and optical sensor all are fixed in on the ring flange through at least one of screw fixation, glue fixed and the fixed mode of joint. This setting, no matter which kind of above-mentioned method all can conveniently install two sensors on the ring flange, simultaneously in the later maintenance, all can conveniently dismantle two sensors get off, the ring flange can continue to use.

Further, the flange plate and the sealing cover are equally provided with mounting grooves for clamping the parts of the sealing rings, and the flange plate and the sealing cover are fixed in one of the modes of screw connection fixation, screw fixation, glue fixation and clamping fixation. This setting, when ring flange and sealed lid are fixed, the sealing washer can block in both mounting grooves, not only can easy to assemble, also makes sealed effect better.

Furthermore, the tail of the aviation plug extends into the sealing cover to be connected with the insulator, and the tail of the aviation plug is arranged at the inner ring position of the sealing ring. This sets up, seals through the sealing washer to the clearance between aviation plug and the sealed lid, and sealed effect is better.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a schematic structural diagram of an acousto-optic integrated sensor.

In the figure, 1, GIL housing; 2. an acousto-optic integrated sensor; 3. a sealing cover; 4. an insulator; 5. an aviation plug; 6. an ultrasonic sensor; 7. an optical sensor; 8. a flange plate; 9. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

As shown in fig. 1, the structure of the prior art is schematically illustrated, the ultrasonic sensor and the uhf sensor are directly installed outside the GIL housing, but the single ultrasonic or uhf detection sensor is erroneously determined if it is interfered.

As shown in fig. 2 and 3, the detection device for insulation fault detection of the GIL equipment comprises a GIL shell 1 and an acousto-optic integrated sensor 2 for insulation monitoring of the inside of the GIL; the single ultrasonic wave or ultrahigh frequency detection sensor is interfered once, and the error is judged, the acousto-optic fusion sensor is adopted in the design, two sensor elements are manufactured on the same stainless steel substrate material to form an integrated multifunctional sensor, and the detection accuracy is higher through the joint judgment of ultrasonic waves and optical signals.

Specifically, the GIL shell 1 is provided with a mounting hole for mounting the acousto-optic integrated sensor 2, the acousto-optic integrated sensor 2 is mounted in the mounting hole and sealed by the sealing cover 3, the mounting hole is opened on the GIL shell 1 through a common tool, then the acousto-optic integrated sensor 2 is mounted on the inner wall of the sealing cover 3, and then the sealing cover 3 is fixed on the mounting hole of the GIL shell 1, so that the operation is convenient, the structure is simple, various external noise interferences are shielded by the structure, the attenuation of fault signals is small, the detection is accurate, and the sensitivity is very high;

specifically, the acousto-optic integrated sensor 2 is electrically connected with an aviation plug 5 outside the cover plate through an insulator 4. Wherein the insulator 4 and the aviation plug 5 are commercially available parts, and only one outlet is needed because the two sensors are integrated together, so that the number of signal transmission cables can be reduced, and the installation is simple and convenient.

Specifically, the acousto-optic integrated sensor 2 comprises an ultrasonic sensor 6, an optical sensor 7 and a flange 8, the ultrasonic sensor 6 and the optical sensor 7 are fixed by the flange 8 serving as a substrate, and the insulator 4 is electrically connected with signal lines of the ultrasonic sensor 6 and the optical sensor 7 respectively. By the arrangement, the two sensors can be conveniently installed together to form the acousto-optic integrated sensor 2, and the two sensors can be conveniently fixed by taking the flange plate 8 as the substrate, so that the two sensors cannot be easily loosened and fall off.

Specifically, the flange 8 is made of stainless steel. The arrangement ensures the strength and the corrosion-resistant effect of the flange plate 8, and can be made of other materials meeting the requirements.

Specifically, a sealing ring 9 is arranged between the cover plate and the flange plate 8. This setting can be solved and trompil leads to the relatively poor problem of leakproofness on GIL casing 1, avoids the condition of gas leakage to take place, and wherein sealing washer 9 can be common rubber seal 9.

Specifically, the ultrasonic sensor 6 and the optical sensor 7 are symmetrically arranged with the insulator 4 as a center, and the insulator 4 is located at the center of the flange 8. This setting not only makes the structure of whole integrative sensor more balanced symmetry, and two sensors are separated by far away, are difficult to interfere with each other, and it is more convenient to install, can not interfere.

Specifically, the sealing cover 3 and the GIL shell 1 are directly fixed in a sealing mode through screw connection or clamping connection. With the above arrangement, the sealing cover 3 can be conveniently mounted on the mounting hole of the GIL case 1, and the mounting hole is sealed.

Specifically, the optical sensor 7 is a wide-angle lens. By adopting the arrangement, the monitoring range of the optical sensor 7 is wider, signals which are more difficult to detect can be detected, and the detection effect is better.

Specifically, the ultrasonic sensor 6 and the optical sensor 7 are fixed on the flange 8 by at least one of the methods of screw fixation, glue fixation and clamping fixation. This setting, no matter which kind of above-mentioned method all can conveniently install two sensors on ring flange 8, simultaneously in the later maintenance, all can conveniently dismantle two sensors get off, ring flange 8 can continue to use.

Specifically, the arc-shaped mounting groove that supplies the part card of sealing washer 9 to go up equallyd divide on ring flange 8 and the sealed lid 3, just it is fixed through one of them mode that spiro union is fixed, screw fixation, glue agent are fixed and the joint is fixed between ring flange 8 and the sealed lid 3. This setting, when ring flange 8 and sealed lid 3 are fixed, in the mounting groove between them can be gone into to sealing washer 9, not only can easy to assemble, also make sealed effect better.

Specifically, the tail of the aviation plug 5 extends into the sealing cover 3 to be connected with the insulator 4, and the tail of the aviation plug 5 is arranged at the inner ring position of the sealing ring 9. This setting seals up the clearance between aviation plug 5 and the sealed lid 3 through sealing washer 9, and sealed effect is better.

The part of the utility model which is not described in detail is the prior art, so the utility model does not detail the part.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Although the terms GIL housing 1, acoustic-optical integrated sensor 2, sealing cover 3, insulator 4, aviation plug 5, ultrasonic sensor 6, optical sensor 7, flange 8, sealing ring 9, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims (10)

1. A detection device for insulation fault detection of GIL equipment is characterized by comprising a GIL shell and an acousto-optic integrated sensor for carrying out insulation monitoring on the interior of the GIL; the GIL shell is provided with a mounting hole for mounting the acousto-optic integrated sensor, and the acousto-optic integrated sensor is mounted in the mounting hole and sealed through a sealing cover; the acousto-optic integrated sensor is electrically connected with the aviation plug outside the cover plate through the insulator.

2. The detection device for insulation fault detection of GIL equipment, as claimed in claim 1, wherein said acousto-optic integral sensor comprises an ultrasonic sensor, an optical sensor and a flange plate, said flange plate is used as a substrate to fix said ultrasonic sensor and said optical sensor, and said insulator is electrically connected with signal wires of said ultrasonic sensor and said optical sensor respectively.

3. The detection device for insulation fault detection of GIL equipment as claimed in claim 2, wherein said flange is made of stainless steel.

4. The detection device for the insulation fault detection of the GIL equipment as claimed in claim 2, wherein a sealing ring is arranged between the cover plate and the flange plate.

5. The detection device for detecting the insulation fault of the GIL equipment as claimed in claim 2, wherein the ultrasonic sensor and the optical sensor are symmetrically arranged with the insulator as a center, and the insulator is located at a center of a circle of the flange.

6. The detection device for insulation fault detection of the GIL equipment as claimed in claim 1, wherein the sealing cover is directly fixed with the GIL shell in a sealing manner through screw connection or clamping connection.

7. The detection device for insulation fault detection of GIL equipment as claimed in claim 2, wherein said optical sensor employs a wide angle lens.

8. The device as claimed in claim 2, wherein the ultrasonic sensor and the optical sensor are fixed to the flange by at least one of screw fixation, glue fixation and clamping fixation.

9. The device as claimed in claim 4, wherein the flange and the sealing cover are respectively provided with mounting grooves for clamping the part of the sealing ring, and the flange and the sealing cover are fixed by one of screwing, gluing and clamping.

10. The detecting device for detecting the insulation fault of the GIL equipment as claimed in claim 9, wherein the tail of the aviation plug extends into the sealing cover to be connected with the insulator, and the tail of the aviation plug is arranged at the inner ring position of the sealing ring.

Images