CN108562646A - GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method - Google Patents
GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method Download PDFInfo
- Publication number
- CN108562646A CN108562646A CN201810369151.2A CN201810369151A CN108562646A CN 108562646 A CN108562646 A CN 108562646A CN 201810369151 A CN201810369151 A CN 201810369151A CN 108562646 A CN108562646 A CN 108562646A
- Authority
- CN
- China
- Prior art keywords
- fixing piece
- phased array
- epoxy bushing
- bolt
- array probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004593 Epoxy Substances 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 239000000523 sample Substances 0.000 claims abstract description 36
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection methods.The detection of epoxy bushing at present is limited only to the exfactory inspection of epoxy bushing, and after installing or running, it does not detect, lacks effectively supervision.The GIS cable termination epoxy bushing ultrasonic phase array detection devices of the present invention include phased array probe, wheel type encoder and phased array ultrasonic detection instrument, and being equipped between the phased array probe and wheel type encoder makes the mobile synchronous interlinked mechanism of the two；The phased array probe and wheel type encoder is connect by cable with phased array ultrasonic detection instrument respectively.Present invention may apply to different epoxy bushing outer diameters, can realize wheel type encoder and ultrasonic phase array probe synchronizing moving, realize positioning when ultrasonic phase array detection and quantify.
Description
Technical field
The present invention relates to electric power complexes non-destructive testing utensil field, specifically a kind of GIS cable terminations epoxies
Casing ultrasonic phase array detection device and detection method.
Background technology
Gas-insulating and fully-enclosed combined electrical apparatus (GIS) is whole by breaker, disconnecting switch, earthing switch, mutual inductor, cable
The complexes that a variety of High-Voltage Electrical Appliances such as end are composed, these equipment or component are all enclosed in the shell of metallic ground,
And it is filled with SF6Gas is as dielectric.
The epoxy bushing of the ends GIS is the insulating body of GIS cable terminations.In GIS cable terminations, epoxy bushing be with
The critical piece of GIS connections, therefore the safe condition of epoxy bushing is the key factor of GIS or even power grid safety work.
The typical structure of epoxy bushing is formed by the poured with epoxy resin as insulating body on metal insert at present.Due to metal with
Epoxy expansion coefficient difference is larger, in the case of temperature change dramatically, epoxy resin and metal insert intersection, especially
It is the relatively thin lower end flange bolt hole near zone of wall ratio, cracking is easy, to cause that SF can be caused6The leakage of gas,
Insulation effect is influenced, such as fails to find in time, breakdown equipment is even exploded, the safe operation to GIS device and power grid
Constitute grave danger.
The detection of epoxy bushing at present is limited only to the exfactory inspection of epoxy bushing, and after installing or running, it does not examine
It surveys, lacks effectively supervision.Ultrasound examination for epoxy bushing is primarily present two problems.Since ultrasonic wave can only be from side
Scanning, and also have bolt hole in casing, detection zone cannot be completely covered in complicated, single ultrasonic wave incident angle, easily
Cause missing inspection.In addition, the ultrasonic attenuation of epoxy resin is very strong, it is approximately 11 times of carbon steel.
Invention content
The technical problem to be solved by the present invention is to overcome the problems of the above-mentioned prior art, a kind of GIS cables are provided
Terminal epoxy bushing ultrasonic phase array detection device makes wheel type encoder and ultrasonic phase array probe synchronizing moving, realizes super
Positioning when sound phased array detects and quantitative.
For this purpose, the technical solution adopted by the present invention is as follows：GIS cable termination epoxy bushing ultrasonic phase array detection devices,
Including phased array probe, wheel type encoder and phased array ultrasonic detection instrument, between the phased array probe and wheel type encoder
Equipped with the interlinked mechanism for making the mobile synchronization of the two；
The interlinked mechanism includes the first fixing piece, pitman, moving part and the second fixing piece；First fixing piece
One end be fixedly connected on the shell of phased array probe, the other end is fixedly connected with one end of the pitman；Second fixing piece
One end be fixedly connected on the shell of wheel type encoder, the other end is flexibly connected with one end of moving part, moving part it is another
End is fixedly connected with the other end of pitman；
The phased array probe and wheel type encoder is connect by cable with phased array ultrasonic detection instrument respectively.
The wheel type encoder has the characteristics that waterproof, and data acquisition can be made synchronous with phased array probe movement, be used for
Positioning and qualitative deficiency in scanning axis direction.
As the supplement of above-mentioned technical proposal, the phased array probe is that the multi-wafer of 2MHz is linearly popped one's head in, side
Open up the screw hole for connecting the first fixing piece.
As the supplement of above-mentioned technical proposal, one end of first fixing piece is provided with adjusting slot, runs through the regulating tank
The screw in hole is connect with the screw hole on phased array probe shell；The other end of first fixing piece takes the shape of the letter U, by the one of pitman
End is clamped and is screwed.
As the supplement of above-mentioned technical proposal, one end of the moving part also takes the shape of the letter U, and the other end of pitman is clamped
And it is screwed；The other end of moving part is flexibly connected using bolt with one end of the second fixing piece.
As the supplement of above-mentioned technical proposal, it is provided at least one movable slotted hole on second fixing piece, bolt passes through
Movable slotted hole is worn, the length of movable slotted hole is more than the diameter of bolt；The head of bolt is fixedly connected with the second fixing piece, bolt
Tail portion is against on the bottom surface of the second fixing piece.
As the supplement of above-mentioned technical proposal, two movable slotted holes being mutually parallel are provided on second fixing piece,
The one of movable slotted hole of bolt-through, the length of movable slotted hole are more than the diameter of bolt；The head of bolt is fixed with second
Part is fixedly connected, and the tail portion of bolt is against on the bottom surface of the second fixing piece.The movable slotted hole that is mutually parallel by two adjusts
The distance between second fixing piece and moving part.
The present invention also provides the detection method of above-mentioned GIS cable terminations epoxy bushing ultrasonic phase array detection device, packets
Include step：
Phased array probe is placed in the lower end lateral wall cambered surface of epoxy bushing and carries out motion scan, wheel type encoder
It follows phased array probe synchronizing moving, wheel type encoder to record the position of phased array probe, realizes when ultrasonic phase array detects
It positions and quantitative；
The longitudinal wave acoustic beam that phased array probe generates -30 ° to 30 ° is scanned epoxy bushing, realizes epoxy bushing ontology
And all standing detection of bolt inserts adjacent area；
By mobile bolt the location of in movable slotted hole, angle changes between the second fixing piece of realization and moving part
Become, to adapt to the detection of different epoxy bushing outer diameters.
The device have the advantages that as follows：Present invention may apply to different epoxy bushing outer diameters, can realize wheel
Formula encoder and ultrasonic phase array probe synchronizing moving, realize positioning when ultrasonic phase array detection and quantify；The present invention is in ring
The longitudinal wave acoustic beam that -30 ° to 30 ° are generated on oxygen casing realizes all standing inspection of epoxy bushing ontology and bolt inserts adjacent area
It surveys, moreover it is possible to overcome the problems, such as that epoxy resin superelevation decays, it is final effectively to solve the lossless of epoxy bushing when installation or in-service operation
Test problems.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the vertical view of Fig. 1；
Schematic diagram when Fig. 3 is present invention detection；
Fig. 4-5 is the structural schematic diagram after the first fixing piece installation screw of the invention (Fig. 5 is the left view of Fig. 4)；
Fig. 6-7 is the structural schematic diagram of moving part of the present invention (Fig. 7 is the left view of Fig. 6)；
Fig. 8 is that the second fixing piece of the invention installs the structural schematic diagram after screw and bolt；
Fig. 9 is to obtain the B-scan figure and C-scan figure of epoxy bushing using present invention scanning.
In figure, 1- wheel type encoders, the second fixing pieces of 2-, 3- moving parts, 4- pitmans, the first fixing pieces of 5-, 6- is phased
Battle array probe, 7- phased array ultrasonic detection instrument, 8- bolts, 9- epoxy bushings, 21- movable slotted holes, 51- adjust slot.
Specific implementation mode
Below by specification drawings and specific embodiments, the present invention is described in further detail, and following embodiment is
It is descriptive be not restrictive, protection scope of the present invention cannot be limited with this.
The GIS cable terminations epoxy bushing ultrasonic phase array detection device as shown in Fig. 1-2,4-8 comprising phased array is visited
First 6, wheel type encoder 1 and phased array ultrasonic detection instrument 7, being equipped between the phased array probe 6 and wheel type encoder 1 makes two
Person moves synchronous interlinked mechanism.
The interlinked mechanism includes the first fixing piece 5, pitman 4, moving part 3 and the second fixing piece 2；Described first is solid
The one end for determining part 5 is fixedly connected on the shell of phased array probe 6, and the other end is fixedly connected with one end of the pitman 4；Second
One end of fixing piece 2 is fixedly connected on the shell of wheel type encoder 1, and the other end is flexibly connected with one end of moving part 3, is interlocked
The other end of part 3 is fixedly connected with the other end of pitman 4.
The phased array probe 6 is that the multi-wafer of 2MHz is linearly popped one's head in, and side is opened up for connecting the first fixing piece 5
Screw hole.
One end of first fixing piece 5, which is provided with, adjusts slot 51, and screw and the phased array through the adjusting slot 51 are visited
Screw hole connection on casing；The other end of first fixing piece 5 takes the shape of the letter U, and one end of pitman 4 is clamped and is consolidated with screw
It is fixed.
One end of the moving part 3 also takes the shape of the letter U, and the other end of pitman 4 is clamped and is screwed；Moving part 3
The other end be flexibly connected with one end of the second fixing piece 2 using bolt 8.
Two movable slotted holes being mutually parallel 21, the work of bolt 8 therethrough are provided on second fixing piece 2
Dynamic slot 21, the length of movable slotted hole 21 are more than the diameter of bolt 8；The head of bolt 8 is fixedly connected with the second fixing piece 2, spiral shell
The tail portion of bolt 8 is against on the bottom surface of the second fixing piece 2.
The phased array probe 6 and wheel type encoder 1 is connect by cable with phased array ultrasonic detection instrument 7 respectively.
The present invention the course of work be：Phased array probe is placed in the lower end lateral wall cambered surface of epoxy bushing and is carried out
Motion scan, as shown in figure 3, wheel type encoder follows phased array probe synchronizing moving, wheel type encoder to record phased array probe
Position, realize positioning when ultrasonic phase array detection and quantitative；Phased array probe generates -30 ° to 30 ° of longitudinal wave acoustic beam to ring
Oxygen casing is scanned, and realizes all standing detection of epoxy bushing ontology and bolt inserts adjacent area；Existed by mobile bolt
The location of in movable slotted hole, the change of angle between the second fixing piece and moving part is realized, to adapt to different epoxy bushings
The detection of outer diameter.
The B-scan image and C-scan image (as shown in Figure 9) for obtaining epoxy bushing through the invention, realize determining for defect
Position and quantitative, realizes the ultrasonic phase array detection of epoxy bushing.
Above example is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (7)
1.GIS cable termination epoxy bushing ultrasonic phase array detection devices, including phased array probe (6), wheel type encoder (1) and
Phased array ultrasonic detection instrument (7), which is characterized in that being equipped between the phased array probe (6) and wheel type encoder (1) makes two
Person moves synchronous interlinked mechanism；
The interlinked mechanism includes the first fixing piece (5), pitman (4), moving part (3) and the second fixing piece (2)；Described
One end of one fixing piece (5) is fixedly connected on the shell of phased array probe (6), and the other end is fixedly connected with the pitman (4)
One end；One end of second fixing piece (2) is fixedly connected on the shell of wheel type encoder (1), the other end and moving part (3)
One end is flexibly connected, and the other end of moving part (3) is fixedly connected with the other end of pitman (4)；
The phased array probe (6) and wheel type encoder (1) is connected by cable and phased array ultrasonic detection instrument (7) respectively
It connects.
2. GIS cable terminations epoxy bushing ultrasonic phase array detection device according to claim 1, which is characterized in that institute
The phased array probe (6) stated is that the multi-wafer of 2MHz is linearly popped one's head in, and side opens up the screw for connecting the first fixing piece (5)
Hole.
3. GIS cable terminations epoxy bushing ultrasonic phase array detection device according to claim 2, which is characterized in that institute
The one end for stating the first fixing piece (5) is provided with adjusting slot (51), through screw and the phased array probe shell of the adjusting slot (51)
Screw hole connection on body；The other end of first fixing piece (5) takes the shape of the letter U, and one end of pitman is clamped and is screwed.
4. GIS cable terminations epoxy bushing ultrasonic phase array detection device according to claim 3, which is characterized in that institute
The one end for stating moving part (3) also takes the shape of the letter U, and the other end of pitman (4) is clamped and is screwed；Moving part (3) it is another
One end is flexibly connected using bolt (8) with one end of the second fixing piece (2).
5. GIS cable terminations epoxy bushing ultrasonic phase array detection device according to claim 4, which is characterized in that institute
At least one movable slotted hole (21) is provided on the second fixing piece (2) stated, bolt (8) runs through movable slotted hole (21), movable slotted hole
(21) length is more than the diameter of bolt (8)；The head of bolt (8) is fixedly connected with the second fixing piece (2), the tail of bolt (8)
Portion is against on the bottom surface of the second fixing piece (2).
6. GIS cable terminations epoxy bushing ultrasonic phase array detection device according to claim 4, which is characterized in that institute
Two movable slotted holes being mutually parallel (21), the loose slot of bolt (8) therethrough are provided on the second fixing piece (2) stated
Hole (21), the length of movable slotted hole (21) are more than the diameter of bolt (8)；The head of bolt (8) and the fixed company of the second fixing piece (2)
It connects, the tail portion of bolt (8) is against on the bottom surface of the second fixing piece (2).
7. utilizing the detection side of any one of the claim 1-6 GIS cable terminations epoxy bushing ultrasonic phase array detection devices
Method, which is characterized in that including step：
Phased array probe is placed in the lower end lateral wall cambered surface of epoxy bushing and carries out motion scan, wheel type encoder follows
Phased array probe synchronizing moving, wheel type encoder record the position of phased array probe, realize positioning when ultrasonic phase array detection
And it is quantitative；
The longitudinal wave acoustic beam that phased array probe generates -30 ° to 30 ° is scanned epoxy bushing, realizes epoxy bushing ontology and spiral shell
The all standing of bolt inserts adjacent area detects；
By mobile bolt the location of in movable slotted hole, the change of angle between the second fixing piece and moving part is realized,
To adapt to the detection of different epoxy bushing outer diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369151.2A CN108562646A (en) | 2018-04-23 | 2018-04-23 | GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369151.2A CN108562646A (en) | 2018-04-23 | 2018-04-23 | GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN108562646A true CN108562646A (en) | 2018-09-21 |
Family
ID=63536177
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810369151.2A Pending CN108562646A (en) | 2018-04-23 | 2018-04-23 | GIS cable terminations epoxy bushing ultrasonic phase array detection device and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983019A (en) * | 2020-08-10 | 2020-11-24 | 国网江苏省电力有限公司电力科学研究院 | Phased array detection device and method for detecting lead sealing defects of cable terminal |
| CN112699037A (en) * | 2020-12-30 | 2021-04-23 | 卡斯柯信号有限公司 | Software testing method for two-out-of-two system |
| CN113866274A (en) * | 2021-10-29 | 2021-12-31 | 国家石油天然气管网集团有限公司 | Ultrasonic detection method for filling defects of steel epoxy sleeve for oil and gas long-distance pipeline |
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