CN-122016884-A - Extra-high voltage GIL unit detection device

CN122016884ACN 122016884 ACN122016884 ACN 122016884ACN-122016884-A

Abstract

The application relates to an extra-high voltage GIL unit detection device, which belongs to the technical field of industrial ray nondestructive detection, and comprises an industrial CT machine main body and a detection plate, wherein the industrial CT machine main body is provided with a ray source and has CT scanning and DR scanning functions, the extra-high voltage GIL unit detection device also comprises a base and an opening annular bracket arranged on the base, an opening movable ring which moves along the circumferential direction of the opening annular bracket is arranged in the opening annular bracket, the industrial CT machine main body is arranged at one end of the opening movable ring, the other end of the opening movable ring is respectively provided with a fixed seat at two sides of the opening movable ring, the detection plate is detachably arranged on any fixed seat, and a driving unit for driving the opening movable ring to rotate along the circumferential direction is arranged on the opening annular bracket. The application can realize the switching between CT scanning and DR scanning, finish high-precision defect detection on the basis of rapid screening, and improve the detection efficiency and accuracy.

Inventors

LI MIAOLING
WANG NINGNING
ZU DALEI
WU YAPING
REN HAIJUN
SHANGGUAN LINJIAN
SHI WEIHUA
WANG CHAOHUA
LI CHAO
LIAN JIE
Li Xuge
LUO MING
JIN WENLONG

Assignees

洛阳理工学院
河南省信大新型成像技术中心有限公司
国网河南省电力公司电力科学研究院

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The ultra-high voltage GIL unit detection device comprises an industrial CT machine main body (5) and a detection plate (3), wherein the industrial CT machine main body (5) is provided with a radiation source, the industrial CT machine main body (5) is provided with CT scanning and DR scanning functions, and is characterized by further comprising a base (1) and an opening annular support (2) arranged on the base (1), an opening movable ring (6) which moves along the circumferential direction of the opening annular support (2) is arranged in the opening annular support (2), the industrial CT machine main body (5) is arranged at one end of the opening movable ring (6), fixed seats (4) are respectively arranged at the two sides of the other end of the opening movable ring (6), the detection plate (3) is detachably arranged on any fixed seat (4), and a driving unit which is used for driving the opening movable ring (6) to rotate along the circumferential direction is arranged on the opening annular support (2); When the ray source and the detection plate (3) are positioned on the same side of the opening movable ring (6), the industrial CT machine main body (5) is used for vertically carrying out CT scanning or DR scanning on the GIL unit (9); When the ray source and the detection plate (3) are positioned at the opposite side of the opening movable ring (6), the industrial CT machine main body (5) is used for obliquely penetrating the GIL unit (9) to perform CT scanning or DR scanning.
2. The ultra-high voltage GIL cell inspection apparatus of claim 1, wherein the split ring support (2) has a first gap and the split ring (6) has a second gap, the width of the first gap being greater than the width of the second gap, the width of the second gap being slightly greater than the outer diameter of the flange (91) of the GIL cell (9).
3. The ultra-high voltage GIL cell inspection apparatus according to claim 2, wherein the inside of the split ring support (2) has a groove (22) extending along the circumference thereof, a plurality of sets of rolling assemblies are circumferentially arranged in the groove (22) at intervals, the plurality of sets of rolling assemblies form a split ring track, the split moving ring (6) can roll along the split ring track circumferentially, and the split moving ring (6) is in rolling fit with the rolling assemblies.
4. The ultra-high voltage GIL cell inspection apparatus according to claim 3, wherein the rolling assembly comprises rolling members disposed opposite to each other and located at both sides of the split moving ring (6), the split moving ring (6) is provided with split annular guide rails (61) at both sides thereof, the rolling members comprise two rollers (21), and the split annular guide rails (61) are embedded between the two rollers (21) at the same side and are in rolling fit with the rollers (21).
5. The ultra-high voltage GIL cell inspection apparatus according to claim 4, wherein one end of the split moving ring (6) can extend into or separate from the first gap region, and the split moving ring (6) can close the first gap when the split moving ring (6) moves along the circumference of the split annular bracket (2); The radiation source is provided with a starting position and a terminating position, the driving unit drives the opening movable ring (6) to rotate along the circumferential direction so as to realize the swing of the radiation source between the starting position and the terminating position, and the included angle between the starting position and the terminating position is 220-230 degrees relative to the axis of the opening annular bracket (2).
6. The ultra-high voltage GIL unit inspection apparatus according to claim 4, wherein the driving unit comprises a driving motor (7) and two gear shafts (73), the gear shafts (73) are rotatably disposed on the open annular support (2) and have gear portions extending into the grooves (22), an open toothed ring (62) is disposed on one side of the open movable ring (6), external teeth meshed with the gear portions are disposed on the outer side of the open toothed ring (62), driven gears (74) are further disposed on the gear shafts (73), driving wheels (71) are disposed on output shafts of the driving motor (7), and the driving wheels (71) and the driven gears (74) are in transmission connection through a synchronous belt (72) or a transmission chain.
7. The ultra-high voltage GIL cell inspection apparatus of claim 6, wherein the split ring rail (61) has a third notch, the split ring gear (62) has a fourth notch, and the widths of the second notch, the third notch and the fourth notch are equal.
8. The ultra-high voltage GIL cell inspection apparatus according to claim 7, wherein the bottom of the industrial CT machine main body (5) is provided with a connection seat (51), and the connection seat (51) is detachably and fixedly connected with the opening moving ring (6) through bolts.
9. The ultra-high voltage GIL unit inspection device according to claim 1, wherein the fixing base (4) is provided with an angle adjusting mechanism, the inspection board (3) is arranged on the angle adjusting mechanism, and the angle adjusting mechanism is used for adjusting an included angle between the inspection board (3) and rays emitted by the ray source so as to ensure that the rays emitted by the ray source are perpendicular to the inspection board (3).
10. The ultra-high voltage GIL unit inspection device according to claim 9, wherein the fixing base (4) is provided with an L-shaped connection plate (41), the L-shaped connection plate (41) comprises a horizontal portion and a vertical portion connected with the horizontal portion, the horizontal portion is connected with the fixing base (4), the angle adjusting mechanism is arranged on the horizontal portion and comprises a semi-annular sliding rail (8), a sliding seat (81) slidably arranged on the semi-annular sliding rail (8) and a supporting plate (82) arranged on the sliding seat (81), the probe plate (3) is installed on the supporting plate (82), and a locking bolt for locking the sliding seat (81) is arranged on the sliding seat (81).

Description

Extra-high voltage GIL unit detection device Technical Field The invention relates to the technical field of industrial ray nondestructive detection, in particular to an extra-high voltage GIL unit detection device. Background In a modern power system, the ultra-high voltage transmission technology is a core means for realizing large-scale and long-distance power transmission, and has important significance for guaranteeing national energy safety and promoting regional economic coordinated development. The ultra-high voltage Gas-insulated metal-enclosed transmission line (Gas-Insulated Transmission Line, GIL) has the remarkable advantages of large transmission capacity, small electric energy loss, small occupied area, small influence by natural environment and the like, becomes core equipment in ultra-high voltage transmission engineering, and is widely applied to scenes such as trans-regional transmission, power station outgoing lines and the like. The GIL unit adopts a modularized design, and key parts of the GIL unit are easy to generate various defects in the production, the transportation, the installation and the long-term operation processes, namely, the conductor connecting part is easy to generate cracks, looseness and foreign matter inclusion, air holes and impurities are easy to form in the insulator, and welding defects are easy to generate in the welding areas of the flange and the shell. Therefore, the method is important to develop efficient and accurate defect detection on key components of the GIL unit. The prior patent CN118483258A discloses an in-situ CT detection device of a GIL conductor connecting mechanism, which adopts a two-half spliced guide rail and toothed ring structure, when in use, splicing standards are difficult to unify, motion mutation points are easy to generate at the splicing seams, imaging dislocation is caused, the two-half spliced structure is complex in disassembly and assembly, time and labor are wasted in a narrow operation space of a GIL site, the scanning obstacle avoidance effect is limited, the shielding of a flange bolt can be avoided only through small-angle adjustment of 0-15 degrees, image superposition interference is easy to occur, and the detection precision of the flange region defect is low. The detection device does not relate to a scanning mode switching function, and cannot meet the dual requirements of rapid screening and high-precision detection. Disclosure of Invention In view of the above, the invention aims to provide an extra-high voltage GIL unit detection device so as to realize dual-mode scanning switching, finish high-precision defect detection on the basis of rapid screening, improve detection efficiency and accuracy, solve the problems of imaging blurring and defect missing detection caused by shielding of flange bolts of the conventional device, realize accurate detection of flange areas, adapt to an extra-high voltage GIL field narrow operation space, realize rapid disassembly and off-line calibration, and reduce field operation difficulty. The technical scheme includes that the ultra-high voltage GIL unit detection device comprises an industrial CT machine main body and a detection plate, wherein the industrial CT machine main body is provided with a radiation source and has CT scanning and DR scanning functions, the ultra-high voltage GIL unit detection device further comprises a base and an opening annular support arranged on the base, an opening movable ring which moves along the circumferential direction of the opening annular support is arranged in the opening annular support, the industrial CT machine main body is arranged at one end of the opening movable ring, the other end of the opening movable ring is respectively provided with a fixed seat at two sides of the opening movable ring, the detection plate is detachably arranged on any fixed seat, and a driving unit for driving the opening movable ring to rotate along the circumferential direction is arranged on the opening annular support; when the ray source and the detection plate are positioned on the same side of the opening movable ring, the industrial CT machine main body is used for vertically carrying out CT scanning or DR scanning on the GIL unit; when the ray source and the detection plate are positioned at the opposite side of the opening movable ring, the industrial CT machine main body is used for obliquely penetrating the GIL unit to perform CT scanning or DR scanning. Further, the opening annular support is provided with a first notch, the opening movable ring is provided with a second notch, the width of the first notch is larger than that of the second notch, and the width of the second notch is slightly larger than the outer diameter of the flange of the GIL unit. Further, the inside of the opening annular support is provided with a groove extending along the circumferential direction of the opening annular support, a plurality of groups of rolling assemblies