Combined electric appliance flange glue filling sealing detection method

A technology for sealing detection and combination electrical appliances, which can be applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum degree for liquid tightness measurement, etc.

Active Publication Date: 2017-04-26
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sealant filling is a process after the flange is installed, the filling quality cannot be observed from the outside. If there is uneven filling, the long-term operation of the lack of glue may cause water ingress and pollution.
Furthermore, there is an aging problem in the glue filling during operation, which leads to the inability to effectively fit and seal between the metal flange and the glue, resulting in water ingress and air intake, which affects safe operation
[0004] At present, there have been many occurrences of poor glue filling in China, which lead to the aging and failure of the sealing ring, resulting in air leakage and outage failures of combined electrical appliances.

Method used

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  • Combined electric appliance flange glue filling sealing detection method
  • Combined electric appliance flange glue filling sealing detection method
  • Combined electric appliance flange glue filling sealing detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown: this embodiment provides a method for detecting the glue filling and sealing of the flange of a combined electrical appliance, including the following steps:

[0033] S1. Clean the surface of the flange to ensure that the surface of the flange on which the ultrasonic longitudinal wave will be incident is a plane;

[0034] S2. Inject the ultrasonic longitudinal wave into the cleaned flange surface, and accept the colloidal bottom surface echo;

[0035] S3. Judging the construction quality of glue filling by the echo of the bottom surface of the colloid. When the quality of the glue filling is intact, there will be three colloid bottom surface echoes; in the case of degumming, there will be one colloid bottom surface echo, and the echo height will be reduced. To 40%-60%; in the case of unfilled, no colloidal back-wall echo will be produced.

[0036] Generally, in a homogeneous material, the existence of defects will cause the discontinuity of ...

Embodiment 2

[0062] Such as figure 2 and image 3 As shown: this embodiment provides a high-voltage combined electrical appliance flange glue sealing detection device, including a base 24, a lifting platform 4 is set on the base 24, and a lifting rod 7 is installed on the lifting platform 4 to rotate. The top of the rod 7 is provided with a cross arm 8 through the rotation mechanism 6, and the front end of the cross arm 8 is provided with a two-axis cloud platform 9, the direction of the two-axis cloud platform 9 is perpendicular to the axis of the cross arm 8, and the two-axis cloud platform The top of the table 9 is provided with a first telescopic rod 10, and the front end of the first telescopic rod 10 is provided with an ultrasonic sensor 11, and a vertical calibration mechanism 12 is provided on the ultrasonic sensor 11, and a controller 3, an ultrasonic Generator 5, oscilloscope 2, alarm 1, described ultrasonic sensor 11, ultrasonic generator 5, controller 3, alarm 1 are connected...

Embodiment 3

[0068] Such as Figure 5 Shown: its difference with embodiment two is:

[0069] The second telescopic link 20 is also set on the two-axis platform 9, and the electric grinding mechanism is arranged at the front end of the second telescopic link 20. Sandpaper 23 provided on the surface of disc 22. Because the surface of the flange has been exposed to the air for a long time, although it is protected by a paint layer, it cannot be guaranteed that the surface is free of rust or debris. Therefore, the surface of the flange is cleaned by an electric grinding mechanism before ultrasonic testing to ensure that the surface is clean. plane, will not affect the detection results. The electric grinding mechanism includes a grinding motor that drives the rotating disk at the front end to rotate, thereby driving the sandpaper on the rotating disk to rotate to achieve grinding. After the detection position is determined during use, the second telescopic rod is aligned with the position th...

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PUM

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Abstract

The invention discloses a combined electric appliance flange glue filling sealing detection method. The method comprises steps that S1, a flange surface is cleaned, and the flange surface to be irradiated by ultrasonic longitudinal waves is guaranteed to be a plane; S2, the flange surface is irradiated by the ultrasonic longitudinal waves after being cleaned, and the flange surface receives colloid bottom echos; and S3, glue filling construction quality is determined through colloid bottom echo conditions, on the condition that glue filling quality is good, three times of colloid bottom echos are generated; under glue shedding conditions, one time of colloid bottom echos is generated, and echo heights can reduce to 40-60%; under the condition of no glue filling, no colloid bottom echo is generated. Through the method, an angle of an ultrasonic sensor can be adjusted to make the ultrasonic longitudinal waves irradiate the flange surface in a vertical angle, multi-time reflection characteristics of the ultrasonic longitudinal waves in a glue filling sealing area colloid are utilized, detection on the high voltage combined electric appliance glue filling areas is carried out, and the position and areas of non-filled, glue-shedding and perfect areas can be determined.

Description

technical field [0001] The invention relates to the technical field of sealing detection of combined electrical appliances, in particular to a method for detecting the sealing of combined electrical appliances with glue filling. Background technique [0002] Combined electrical appliances are the core components of modern power grids, which are composed of central conductors, operating parts, shells, and pot insulators, and the internal space is filled with sulfur hexafluoride gas insulating gas. The combined electrical appliance is a cylindrical structure, which is connected by multiple sections. There are flanges between the sections or at the end positions. The main seal of the flange is an O-ring, and an annular glue sealing area is provided outside the O-ring. When water or organic liquid infiltrates into the O-ring position, it will cause corrosion of the sealing surface and aging of the O-ring, and the main function of the glue sealing area is to prevent external wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/24
CPCG01M3/24
Inventor 郭凯郭果李茹勤梁向阳陈凯张利屈延师裴东良岳雷刚张高峰刘涛范明森余开伟王炎
Owner STATE GRID CORP OF CHINA
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