A partial discharge detection device for GIS equipment

Abstract

The present invention discloses a GIS equipment partial discharge detection device, comprising a rectangular protection frame, two sides of the protection frame are respectively provided with positioning mechanisms for limiting the position of the GIS equipment, a positioning ring assembly is provided inside the protection frame, and a plurality of detectors are circumferentially provided on the positioning ring assembly; the protection frame is provided with an adjustment mechanism for adjusting the position of each detector. The adjustment mechanism provided in the present invention can adjust the positions of multiple detectors as needed, and multiple detectors can simultaneously detect various positions of the GIS equipment online, thereby reducing the probability of missed detection, being able to adapt to the detection work of the GIS equipment in different environments, and increasing the scope of application of the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS equipment fault diagnosis, and more specifically to a GIS equipment partial discharge detection device. Background Art

[0002] Gas-insulated metal-enclosed switchgear (GIS) has been widely promoted and applied in the power industry due to its own advantages. GIS equipment consists of circuit breakers, disconnectors, grounding switches, mutual inductors, lightning arresters, busbars, connectors and outgoing terminals. These devices or components are all enclosed in a metal grounded casing, which is filled with SF6 insulating gas at a certain pressure, so it is also called SF6 fully enclosed combination electrical appliances. However, due to its compact structure, once a fault occurs, it is easy to spread to adjacent compartments, resulting in the expansion of the accident. In addition, with the development of social economy, the requirements for power supply reliability and safety are getting higher and higher.

[0003] The main cause of GIS accidents is insulation failure, and partial discharge is often a precursor to insulation failure. If potential partial discharge hazards can be discovered in advance, accidents can be prevented and operational reliability can be improved. Currently, most devices used for partial discharge detection of GIS equipment only have one detector on the GIS equipment. However, the working environment of the GIS equipment may be interfered by external signals, resulting in the risk of missed detection of the detector. In addition, the working environment of each group of GIS equipment is different, so it cannot adapt to the online detection of GIS equipment in different environments. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a local discharge detection device for GIS equipment to solve the problem of missed detection of detectors in the current local discharge detection device for GIS equipment, so as to adjust the position of the detectors so that multiple detectors can simultaneously perform online detection on various positions of the GIS equipment, thereby reducing the probability of missed detection.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A local discharge detection device for GIS equipment comprises a protection frame arranged in a rectangular shape, positioning mechanisms for limiting the position of GIS equipment are respectively arranged on both sides of the protection frame, a positioning ring assembly is arranged inside the protection frame, and a plurality of detectors are circumferentially arranged on the positioning ring assembly; an adjustment mechanism for adjusting the position of each detector is arranged on the protection frame; the positioning ring assembly comprises a rotatable ring and an inner sleeve ring respectively arranged inside the protection frame, and the inner sleeve ring is fixedly sleeved inside the rotatable ring through a connecting rod.

[0007] To further optimize the technical solution, the positioning ring assembly includes a rotatable ring and an inner ring respectively arranged inside the protective frame, and the inner ring is fixedly sleeved inside the rotatable ring.

[0008] To further optimize the technical solution, the adjustment mechanism includes an axial adjustment mechanism for adjusting the detector to point to the axial position of the GIS device and a circumferential adjustment mechanism for adjusting the detector along the circumferential position of the GIS device.

[0009] To further optimize the technical solution, the axial adjustment mechanism includes an adjustment screw that is threaded through the rotatable ring and the inner ring respectively, and a buffer assembly arranged between the adjustment screw and the detector.

[0010] To further optimize the technical solution, the buffer assembly includes a positioning plate connected to the end of the adjusting screw extending into the inner side of the inner ring, an extrusion spring fixedly connected to the side of the positioning plate facing the center of the inner ring, and an inner solid block fixedly sleeved on the outside of the extrusion spring, an arc plate fixedly provided on the side of the inner solid block facing the center of the inner ring, and the detector is positioned on the arc plate.

[0011] To further optimize the technical solution, a sliding rod that slides through the positioning plate is connected to the side of the inner solid block away from the center of the inner ring, and one end of the sliding rod away from the inner solid block is fixedly connected to the limiting block.

[0012] To further optimize the technical solution, a plurality of inner support rods respectively threadedly matched with the adjusting screw are fixedly arranged on the inner side wall of the inner sleeve ring; and a hand wheel is respectively connected to one end of each adjusting screw located outside the rotatable ring.

[0013] To further optimize the technical solution, the circumferential adjustment mechanism includes a mounting groove provided on the side wall of the protective frame, a driving gear rotatably arranged in the mounting groove, and an external gear ring arranged on the outer circular side wall of the rotatable ring and meshing with the driving gear, and the driving gear is coaxially connected to a hand crank rotatably arranged on the protective frame.

[0014] To further optimize the technical solution, the positioning mechanism includes outriggers symmetrically arranged on both sides of the protective frame, and each outrigger is provided with a detachable ring for positioning the GIS equipment.

[0015] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0016] The adjustment mechanism provided in the present invention can adjust the positions of multiple detectors as needed. Multiple detectors can simultaneously perform online detection on various positions of the GIS equipment, reducing the probability of missed detection, being able to adapt to the detection work of GIS equipment in different environments, and increasing the scope of application of the present invention.

[0017] The present invention selects a fixing ring whose inner diameter is equal to the outer diameter of the GIS device, fits the fixing rings on both sides of the protective frame to the outside of the GIS device, and fixes the two outer patches that fit together on the fixing rings through bolts and nuts, so that the GIS device can be positioned on the protective frame very stably, and the two fixing rings that cooperate with each other fit perfectly with the GIS device, thereby ensuring the stability of the protective frame.

[0018] Rotating the hand dial wheel of the present invention can cause the adjusting screw to rotate accordingly, thereby driving the positioning plate, the extrusion spring and the inner solid block to approach the GIS device, so that the detector is closely connected with the GIS device and will not be damaged due to extrusion, thereby ensuring the stability of the detector and always fitting with the GIS device. Even if the GIS device shakes, it can still detect normally, making the detection more accurate and preventing the detector from detaching after being used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 It is a cross-sectional view of the adjustment mechanism of the present invention.

[0022] Among them: 1. Protective frame; 2. Rotatable ring; 3. Inner ring; 4. Detector; 5. Outer bracket; 6. Fixed ring; 7. External patch; 8. Driving gear; 9. Hand crank; 10. External gear ring; 11. Adjusting screw; 12. Hand dial wheel; 13. Inner support rod; 14. Positioning plate; 15. Extrusion spring; 16. Inner solid block; 17. Arc plate; 18. Sliding rod; 19. Limit block; 20. Connecting rod. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] A GIS equipment partial discharge detection device, combined with Figures 1 to 3 As shown, it includes a protective frame 1, a positioning mechanism, a positioning ring assembly, a detector 4 and an adjustment mechanism.

[0025] The protection frame 1 is arranged in a rectangular shape, and positioning mechanisms are respectively arranged on both sides of the protection frame 1, and the positioning mechanisms are used to limit the position of the GIS equipment.

[0026] The positioning mechanism includes an outrigger 5 and a collar. Two outriggers 5 are provided, symmetrically arranged on both sides of the protective frame 1. Each outrigger 5 is provided with a detachable collar, which is used to position the GIS equipment. Each collar includes two fixed collars 6, and each outrigger 5 is divided into an upper and lower part. The two fixed collars 6 are respectively connected to the opposite ends of the upper and lower outriggers 5.

[0027] The two fixing rings 6 are arranged facing each other, and the external patches 7 are fixedly connected to the opposite surfaces of the two fixing rings 6 respectively, and the two external patches 7 are fixed by bolts and nuts.

[0028] In the prior art, most GIS devices (parts to be inspected) are cylindrical in structure, so two fixed rings 6 with suitable inner diameters can fit perfectly on the outside of the GIS device. In the present invention, the inner diameter of the fixed ring 6 can be determined according to the outer diameter of the part to be inspected of the GIS device, so that the structure of the protective frame 1 is stable.

[0029] A positioning ring assembly is provided inside the protective frame 1, and a plurality of detectors 4 are provided, and each detector 4 is circumferentially arranged on the positioning ring assembly. In the present invention, the detectors 4 and other structures cooperating with the detectors 4 are set to three. In actual design, more detectors, such as four or five, can be designed to meet the needs of different GIS equipment or different scenarios. The detector 4 can be a UHF sensor (optional model VM-351-401-S4) or an ultrasonic sensor (optional model UC6000-30GM-IUR2-V15).

[0030] The positioning ring assembly includes a rotatable ring 2 and an inner ring 3 respectively arranged inside the protective frame 1, and the inner ring 3 is fixedly sleeved inside the rotatable ring 2. The inner ring 3 is fixedly connected to the rotatable ring 2 through three connecting rods 20, and the two ends of the connecting rod 20 are respectively welded and fixed to the rotatable ring 2 and the inner ring 3.

[0031] The protective frame 1 is provided with an adjustment mechanism for adjusting the position of each detector 4. The adjustment mechanism includes an axial adjustment mechanism and a circumferential adjustment mechanism. The axial adjustment mechanism is used to adjust the detector 4 to point to the axial position of the GIS equipment. The circumferential adjustment mechanism is used to adjust the position of the detector 4 along the circumference of the GIS equipment.

[0032] The present invention is provided with three groups of axial adjustment mechanisms respectively arranged in the protection frame 1, and the axial adjustment mechanisms include an adjustment screw 11 and a buffer assembly. The adjustment screw 11 is threaded through the rotatable ring 2 and the inner sleeve ring 3 respectively. The buffer assembly is arranged between the adjustment screw 11 and the detector 4.

[0033] A plurality of inner support rods 13 are fixedly arranged on the inner side wall of the inner sleeve ring 3 and are respectively threadedly matched with the adjusting screw 11. The inner support rods 13 provided in the present invention make the structure of the adjusting screw 11 more stable. A hand wheel 12 is connected to one end of each adjusting screw 11 located outside the rotatable ring 2, and when the hand wheel 12 is turned, the adjusting screw 11 can be driven to rotate.

[0034] The buffer assembly includes a positioning plate 14, a squeeze spring 15, an inner solid block 16 and an arc plate 17. The positioning plate 14 is connected to the end of the adjusting screw 11 extending into the inner side of the inner sleeve 3. The squeeze spring 15 is fixedly connected to the side of the positioning plate 14 facing the center of the inner sleeve 3. The inner solid block 16 is fixedly sleeved on the outside of the squeeze spring 15, and the other end of the squeeze spring 15 is fixedly set on the inner solid block 16. The inner solid block 16 is fixedly set with an arc plate 17 on the side facing the center of the inner sleeve 3, and the detector 4 is positioned and set on the arc plate 17.

[0035] In order to make the inner solid block 16 elastically expand and contract in only one direction, avoid displacement of the detector 4, and make the structure of the detector 4 stable, the present invention connects and sets a slide bar 18 that slides through the positioning plate 14 on the side of the inner solid block 16 away from the center of the inner ring 3, and two slide bars 18 are provided, and one end of the two slide bars 18 away from the inner solid block 16 is fixedly connected to the limiting block 19. The extrusion spring 15 is provided, so that the inner solid block 16 has a certain elasticity, and because the slide bar 18 and the limiting block 19 cooperate, the inner solid block 16 elastically expands and contracts in only one direction.

[0036] The buffer assembly provided in the present invention can prevent the detector 4 from being directly damaged due to excessive squeezing force when it contacts and fixes the GIS equipment. In addition, the GIS equipment may produce slight vibrations due to various reasons during use. Therefore, the provision of the squeezing spring 15 further reduces the probability of damaging the detector 4.

[0037] The circumferential adjustment mechanism includes a mounting groove, a driving gear 8, an external gear ring 10 and a hand crank 9. The mounting groove is provided through the side wall of the protection frame 1. The driving gear 8 is rotatably arranged in the mounting groove through a transverse axis, and the transverse axis is rotatably arranged on the protection frame 1 through a bearing, so that the driving gear 8 can rotate stably. The external gear ring 10 is arranged on the outer circumferential side wall of the rotatable ring 2 and meshes with the driving gear 8. The driving gear 8 is coaxially connected with a hand crank 9, and the hand crank 9 is rotatably arranged on the protection frame 1.

[0038] When positioning the GIS device, the present invention installs the cylindrical pipe of the GIS device (usually spliced ​​in sections), puts the inner ring 3 on the outside of the GIS device, selects a fixing ring 6 with an inner diameter equal to the outer diameter of the GIS device, and fits the fixing rings 6 on both sides of the protective frame 1 to the outside of the GIS device. Use multiple bolts and nuts to fix the outer patch 7 that fits on the same end of the two fixing rings 6, so that the two matching fixing rings 6 fit perfectly with the GIS device, thereby ensuring the stability of the protective frame 1 and effectively positioning the GIS device.

[0039] When the present invention performs discharge detection on GIS equipment, multiple hand wheels 12 are manually rotated to rotate the adjustment screw 11 connected thereto and move toward the center of the inner ring 3, driving the positioning plate 14, the extrusion spring 15, the inner solid block 16 and the arc plate 17 connected thereto to approach the outer wall of the GIS equipment. When the detector 4 fits against the outer wall of the GIS equipment, the extrusion spring 15 will be compressed first, and the two slide bars 18 will slide a short distance along the positioning plate 14. Then the personnel needs to stop rotating the hand wheel 12, and under the action of the extrusion spring 15, the detector 4 will be close to the GIS equipment, so as to perform online detection. The principle of online detection is: to detect the ultra-high frequency electromagnetic wave (300M-3000MHz) signal generated by the local discharge in the power equipment, obtain relevant discharge information, realize local discharge detection, and perform normal online detection even when the GIS equipment vibrates to a certain extent.

[0040] The present invention can also adjust the position of each detector 4. Before axially adjusting multiple detectors 4, manually hold the hand crank 9 and rotate it to rotate the driving gear 8, thereby driving the external gear ring 10 to rotate, thereby driving the rotatable ring 2 and the inner sleeve ring 3 to rotate, and changing the positions of multiple detectors 4, so that multiple detectors 4 can adapt to partial discharge detection of GIS equipment in different environments. After adjusting the circumferential position of each detector 4, manually rotate each hand dial 12 to achieve positioning between each detector 4 and the GIS equipment, and then perform partial discharge detection.

Claims

1. A partial discharge detection device for GIS equipment, characterized in that: The invention comprises a rectangular protective frame (1), wherein positioning mechanisms for limiting the position of GIS equipment are respectively arranged on both sides of the protective frame (1), a positioning ring assembly is arranged inside the protective frame (1), and a plurality of detectors (4) are circumferentially arranged on the positioning ring assembly; an adjustment mechanism for adjusting the position of each detector (4) is arranged on the protective frame (1); the positioning ring assembly comprises a rotatable ring (2) and an inner sleeve ring (3) respectively arranged inside the protective frame (1), and the inner sleeve ring (3) is fixedly sleeved inside the rotatable ring (2) via a connecting rod (20); The adjustment mechanism comprises an axial adjustment mechanism for adjusting the position of the detector (4) pointing to the axis of the GIS device and a circumferential adjustment mechanism for adjusting the position of the detector (4) along the circumference of the GIS device; The axial adjustment mechanism comprises an adjustment screw (11) threadedly passing through the rotatable ring (2) and the inner sleeve ring (3), and a buffer assembly arranged between the adjustment screw (11) and the detector (4); The buffer assembly comprises a positioning plate (14) connected to an end of the adjusting screw (11) extending into the inner side of the inner sleeve ring (3), a compression spring (15) fixedly connected to a side of the positioning plate (14) facing the center of the inner sleeve ring (3), and an inner solid block (16) fixedly sleeved on the outside of the compression spring (15), the inner solid block (16) being fixedly provided with an arc plate (17) on a side of the inner sleeve ring (3) facing the center, and the detector (4) being positioned on the arc plate (17); A sliding rod (18) that slides through the positioning plate (14) is connected to the side surface of the inner fixing block (16) away from the center of the inner sleeve ring (3), and one end of the sliding rod (18) away from the inner fixing block (16) is fixedly connected to a limiting block (19); A plurality of inner support rods (13) are fixedly arranged on the inner side wall of the inner sleeve ring (3) and are respectively threadedly mounted on the adjusting screw rods (11); one end of each adjusting screw rod (11) located outside the rotatable ring (2) is respectively connected to a hand wheel (12); The positioning mechanism comprises outriggers (5) symmetrically arranged on both sides of the protection frame (1), and each outrigger (5) is provided with a detachable ring for positioning the GIS equipment.

2. A GIS equipment partial discharge detection device according to claim 1, characterized in that: The circumferential adjustment mechanism comprises a mounting groove formed on the side wall of the protection frame (1), a driving gear (8) rotatably arranged in the mounting groove, and an external gear ring (10) arranged on the outer circumferential side wall of the rotatable ring (2) and meshing with the driving gear (8); the driving gear (8) is coaxially connected to a hand crank (9) rotatably arranged on the protection frame (1).

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