A sensor installation fixing device for GIS partial discharge monitoring

Abstract

The present application relates to a kind of GIS sensor installation fixed device for partial discharge monitoring, including UHF sensor, insulating basin, bandage, flange is connected by threaded rod and fastening nut.Sensor both ends are provided with ear hole, its both sides are installed on the threaded rod near symmetrically with the winding box of automatic winding function and fixed seat, bandage first end is fixed in winding box, end is fixed in winding box top through ear hole.Fixed seat is composed of fixed ring and fixed plate, fixed plate both ends are provided with strip-shaped through hole, can be relied on the fixed rod on fixed ring to realize horizontal, bidirectional adjustment, adapt to the installation parameters of different specifications flange, insulating basin, accurately position sensor.Winding box is built-in spring to realize bandage automatic tightening, with clamping plate clamping and fixed, plug slot limit lock structure, can be completed installation by single person single side, adapt to narrow operation space.At the same time, the device is provided with unlocking press column and spring ejection structure, can quickly disassemble bandage to facilitate the maintenance and replacement of UHF sensor.

Description

Technical Field

[0001] This invention relates to the field of GIS partial discharge online monitoring device technology, and to a sensor mounting and fixing device for GIS partial discharge monitoring. Background Technology

[0002] Partial discharge monitoring in GIS relies on collecting signals such as ultra-high frequency electromagnetic waves, ultrasonic waves, and SF6 decomposition products generated by partial discharge to achieve early warning, location, and fault diagnosis of insulation defects. It is a key technology to ensure the safe operation of GIS equipment. Ultra-high frequency (UHF) sensors are mainly used to detect signal leakage in basin-type insulators. These sensors are installed on the outside of the non-metallic area of ​​the basin, allowing partial discharge electromagnetic waves to penetrate the non-metallic region and be captured by the sensor.

[0003] UHF sensors are mainly fixed using two methods: bolts and straps. Bolts are only suitable for pot-type insulators with casting holes; straps are suitable for pot-type insulators without casting holes. The fixing structure for the latter is as follows: Figure 1 As shown, the fixing method involves passing the strap through the ear holes at both ends of the UHF sensor and then wrapping the strap around the basin insulator 1-3 times to secure it. Although the tools used in this fixing method are relatively simple, it is necessary to straighten the strap during the process of wrapping it around the basin insulator to ensure that it is tightly wrapped. However, the diameter of the insulator basin in most GIS equipment is relatively large, making it difficult for one person to straighten it. In addition, some GIS equipment has a compact layout and limited operating space, which further increases the difficulty of installing and fixing the sensor. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical problems and provide a sensor mounting and fixing device for GIS partial discharge monitoring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sensor mounting and fixing device for GIS partial discharge monitoring, comprising a UHF sensor, an insulating basin, a strap, and a GIS metal tube. The GIS metal tube has a flange at its end, and the insulating basin is located between two adjacent flanges. The two flanges are connected by multiple threaded rods and fastening nuts. The UHF sensor is fixed to the outside of the insulating basin by the strap. The UHF sensor also has ear holes at both ends. There are two straps. At both ends of the UHF sensor, a fixing seat and a winding box for automatically winding the strap are installed on the threaded rod close to it. The winding box is fixed on the fixing seat. The first end of the strap is fixed in the corresponding winding box, and the end passes through the corresponding ear hole and is fixed to the top of the corresponding winding box. The fixing seat includes two fixing rings sleeved on both ends of the threaded rod and a fixing plate attached to the outside of the flange. The top of the fixing ring is provided with a fixing rod and a fixing nut is installed. The two fixing rings are fixed to both ends of the fixing plate by the corresponding fixing rod and fixing nut.

[0006] Furthermore, both ends of the fixing plate are provided with strip-shaped through holes, and the fixing rod can move in the strip-shaped through holes in the left-right and up-down directions. The fixing rod is provided with external threads, and a fixing nut cooperates with it and presses on the top of the fixing plate.

[0007] Furthermore, a second fixing nut is installed on the outer side of the fixing ring at the end of the threaded rod. The second fixing nut is of the same type as the fastening nut.

[0008] Furthermore, a winding rod is rotatably provided inside the winding box, and support covers are provided at both ends of the winding rod inside the winding box. The winding rod passes through the support covers and is rotatably connected to them. A spring is provided inside the support covers, and the two ends of the spring are respectively connected and fixed to the winding rod and the inner wall of the support covers.

[0009] Furthermore, the winding box is equipped with a fixed clamping plate, and a threaded moving rod is provided on the side of the winding box away from the UHF sensor. The fixed clamping plate is moved towards the strap wound on the winding rod by the threaded moving rod to clamp it. At least two support rods are provided on the side of the fixed clamping plate away from the strap. The other end of the support rod passes through the side wall of the winding box and is fixed with an anti-detachment ring. A spring is provided between the anti-detachment ring and the outer wall of the winding box, and the spring is sleeved on the support rod.

[0010] Furthermore, the bottom of the fixing plate and the side of the fixing clamp near the strap are provided with flexible rubber pads.

[0011] Furthermore, the end of the strap is fixedly provided with a plug, the top of the winding box is provided with a slot, the plug is provided with a rectangular limiting hole, the bottom of the slot is provided with a telescopic groove, and a telescopic limiting block is provided inside by sliding up and down. The top surface of the telescopic limiting block is inclined and can be inserted into the rectangular limiting hole. A second spring is provided in the telescopic groove, and the second spring is connected and fixed to the bottom wall of the telescopic groove and the telescopic limiting block.

[0012] Furthermore, the slot has a through hole at the top, and an unlocking pressing post slides up and down inside. The slot has a spring three at the sealed end, which presses against the plug. A protective sleeve is connected to the outer end of the through hole. The top surface of the unlocking pressing post does not extend to the outside of the protective sleeve. The top of the protective sleeve is also provided with a limiting ring, the inner diameter of which is smaller than the diameter of the unlocking pressing post.

[0013] Furthermore, the end of the plug away from the strap has a notch, the width of which is greater than the width of the unlocking pressing post.

[0014] Furthermore, the fixing plate has an ear plate on the side near the UHF sensor, and the ear plate has a strap hole through which the strap passes.

[0015] The beneficial effects of the present invention are as follows: The present invention sets up two sets of fixed seats and winding box structures with two sets of winding strap assemblies, which are integrated and fixed on the threaded rods close to both ends of the sensor. During the installation process, it is not necessary to straighten the straps around the entire insulating basin. The entire process of strap insertion, tightening and fixing can be completed on only one side of the insulating basin. It can be installed by a single person and can adapt to narrow operating spaces.

[0016] The mounting base of this invention adopts an adjustable structure. The mounting plate has strip-shaped through holes at both ends. The mounting rod can be adjusted horizontally and vertically within the through holes. It can flexibly adjust the installation position of the mounting plate and the winding box according to equipment parameters such as the edge size of different flange specifications, the spacing of the threaded rod axis, and the width of the insulating basin, and accurately align the sensor with the center of the insulating basin to complete the sensor positioning and fixing.

[0017] The fixed ring of this invention is limited by a second fixing nut on the outside, which avoids the problem of the fixed ring shifting or loosening due to environmental interference, ensures the stability of the overall structure of the fixed base, and prevents the sensor from being misaligned or falling off.

[0018] This invention uses a plug-slot combination, a limiting telescopic block, and a rectangular limiting hole to fix the end of the strap. A spring is used to automatically tighten the strap, and a clamping and fixing block is used to clamp and fix the beginning of the strap. This allows for quick installation and fixation, and the operation is convenient without the need for multiple people to assist with the installation. Furthermore, this invention can be quickly unlocked by using an unlocking press post in conjunction with a spring, which facilitates subsequent maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a structure for fixing a UHF sensor in the prior art; Figure 2 This is a schematic diagram of the structure of a sensor mounting and fixing device for GIS partial discharge monitoring according to the present invention; Figure 3 This is a partial structural schematic diagram of a sensor mounting and fixing device for GIS partial discharge monitoring according to the present invention; Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the winding box in this invention. Figure 1 ; Figure 5 This is a schematic diagram of the longitudinal cross-sectional structure of the winding box in this invention. Figure 2 ; Figure 6 This is a schematic diagram of the strap and plug in this invention.

[0020] 1. UHF sensor; 2. Insulating basin; 3. Strap; 4. Flange; 5. Threaded rod; 6. Fastening nut; 7. Ear hole; 8. Fixing base; 9. Rewind box; 10. Fixing ring; 11. Fixing plate; 12. Fixing rod; 13. Fixing nut one; 14. Strip-shaped through hole; 15. Fixing nut two; 16. Rewinding rod; 17. Support cover; 18. Spring; 19. Fixing clamp; 20. Threaded moving rod; 21. Support rod; 22. Anti-detachment ring; 23. Spring one; 24. Plug; 25. Slot; 26. Rectangular limiting hole; 27. Telescopic groove; 28. Telescopic limiting block; 29. ​​Spring two; 30. Through hole; 31. Unlocking pressing post; 32. Protective sleeve; 33. Limiting ring; 34. Notch; 35. Ear plate; 36. Strap hole; 37. Flexible rubber pad; 38. Spring three. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0022] Example 1: As Figure 2 As shown, a sensor mounting and fixing device for GIS partial discharge monitoring includes a UHF sensor 1, an insulating basin 2, a strap 3, and a GIS metal tube. The GIS metal tube has a flange 4 at its end. The insulating basin 2 is located between two adjacent flanges 4. The two flanges 4 are connected by multiple threaded rods 5 and fastening nuts 6. The UHF sensor 1 has ear holes 7 at both ends. The strap 3 passes through the ear holes 7 and fixes the UHF sensor 1 to the outside of the insulating basin 2.

[0023] Specifically, such as Figure 2 As shown, there are two straps 3, and two sets of fixing seats 8 and a winding box 9 that can automatically wind up the straps 3 are provided. The winding box 9 is fixed on the top (middle position) of the corresponding fixing seat 8. The two fixing seats 8 are installed on the threaded rods 5 at both ends of the UHF sensor 1. The first end of the strap 3 is fixed in the corresponding winding box 9, and the end passes through the corresponding ear hole 7 and is fixed on the top of the corresponding winding box 9.

[0024] With the above structure, the installation of the straps can be achieved by operating only on one side of the insulating basin 2, without having to straighten the straps 3 along the insulating basin 2, which is convenient for use in confined spaces and installation occasions where the diameter of the insulating basin 2 is large.

[0025] like Figure 3As shown, the fixing base 8 includes two fixing rings 10 sleeved on both ends of the threaded rod 5 and a fixing plate 11 attached to the outside of the flange 4. The top of the fixing ring 10 is provided with a fixing rod 12 and a fixing nut 13 is installed. The two fixing rings 10 are fixed to both ends of the fixing plate 11 by the corresponding fixing rods 12 and fixing nuts 13.

[0026] Specifically, such as Figure 3 As shown, both ends of the fixing plate 11 are provided with strip-shaped through holes 14. The fixing rod 12 can move in the strip-shaped through holes 14 in the left and right and up and down directions. The fixing rod 12 is provided with external threads, and the fixing nut 13 cooperates with it and presses on the fixing plate 11.

[0027] With the above structure, the horizontal and vertical positions of the fixing ring 10 can be adjusted according to the distance between the edge of the flange 4 and the axis of the threaded rod 5 and the width of the insulating basin 2, so that after fixing, the fixing plate 11 can fit against the outer edge of the flange 4 and will not cause the fixing seat 8 to shift due to the tightening of the straps.

[0028] In specific use: First, put the two fixing rings 10 on the corresponding nuts, then pass the two fixing rods 12 through the strip-shaped through holes 14 on the fixing plate 11 and screw on the fixing nut 13 (do not tighten at this time). Adjust the position of the fixing plate 11 so that the winding box 9 is aligned with the middle of the insulating basin 2. Then tighten the fixing nut 13 to fix the fixing seat 8. After fixing the two fixing seats 8, pull out the strap 3, pass it through the ear hole 7 and fix it on the top of the corresponding winding box 9. The winding box 9 automatically tightens the strap 3 to achieve binding.

[0029] Example 2: Based on Example 1, such as Figure 2 As shown, a fixing nut 2 15 is also installed on the outer side of the fixing ring 10 at the end of the threaded rod 5. The fixing nut 2 15 is the same model as the fastening nut 6.

[0030] The above structure can limit the position of the fixing ring 10 and prevent it from shifting or loosening.

[0031] Example 3: Based on Example 1 or 2, such as Figure 4 As shown, a winding rod 16 is rotatably mounted inside the winding box 9. Support covers 17 are provided at both ends of the winding rod 16 within the winding box 9. The winding rod 16 passes through the support covers 17 and is rotatably connected to a bearing on the support covers 17. Both rotate via the bearing. A spring 18 is provided inside the support cover 17, with both ends of the spring 18 connected and fixed to the inner walls of the winding rod 16 and the support cover 17, respectively. It is worth noting that the strap 3 is fixed to the winding rod 16.

[0032] Furthermore, such as Figure 5As shown, the winding box 9 is provided with a fixed clamping plate 19. A threaded moving rod 20 is provided on the side of the winding box 9 away from the UHF sensor 1 (it is worth noting that the side wall of the winding box 9 is provided with a threaded hole, which cooperates with the threaded moving rod 20). The fixed clamping plate 19 is pushed to move towards the strap 3 wound on the winding rod 16 by the threaded moving rod 20 to clamp it. At least two support rods 21 are provided on the side of the fixed clamping plate 19 away from the strap 3. The other end of the support rod 21 passes through the side wall of the winding box 9 and is fixed with an anti-detachment ring 22. A spring 23 is provided between the anti-detachment ring 22 and the outer wall of the winding box 9. The spring 23 is sleeved on the support rod 21.

[0033] It is worth noting that when the threaded moving rod 20 is in contact with the fixed clamping plate 19 and the spring 23 is in a free state, the support rod 21 extends to the outside of the winding box 9 at its longest length.

[0034] Furthermore, since the outer edge of the flange 4 is arc-shaped and the bottom surface of the fixing plate 11 is flat, the contact area between the fixing plate 11 and the flange 4 is extremely small when the flexible rubber pad 37 is not provided at the bottom of the fixing plate 11. In order to increase the contact area and increase the stability of the fixing, the bottom of the fixing plate 11 is provided with a flexible rubber pad 37. Similarly, the side of the fixing clamp 19 near the strap 3 is also provided with a flexible rubber pad 37.

[0035] In this specific application, when the strap 3 is pulled outward, the spring 18 deforms, fixing the end of the strap 3 to the winding box 9. After the strap 3 is released, the spring 18 can drive the winding rod 16 to rotate in the opposite direction, automatically winding up the excess strap 3 and tightening it. After the strap 3 is tightened and the position of the UHF sensor 1 is adjusted, the threaded moving rod 20 can be rotated to move the fixing plate 19 toward the strap 3 for clamping and fixing (at this time, the spring 23 is compressed). When the strap 3 needs to be adjusted, the threaded moving rod 20 is rotated in the opposite direction. Under the action of the spring 23, the fixing plate 19 is moved in the opposite direction to loosen the strap 3.

[0036] Example 4: Based on Example 3, such as Figure 5 As shown, the end of the strap 3 is fixedly provided with a plug 24, the top of the winding box 9 is provided with a slot 25, the plug 24 is provided with a rectangular limiting hole 26, the bottom of the slot 25 is provided with a telescopic groove 27, and a telescopic limiting block 28 is provided inside, the top surface of the telescopic limiting block 28 is inclined and can be inserted into the rectangular limiting hole 26, and a second spring 29 is provided in the telescopic groove 27, which is connected and fixed to the bottom wall of the telescopic groove 27 and the telescopic limiting block 28.

[0037] like Figure 5As shown, the slot 25 has a through hole 30 at the top, and an unlocking pressing post 31 is provided inside that slides up and down. The slot 25 has a spring 38 at the sealed end, which presses against the plug 24. The outer end of the through hole 30 is connected to a protective sleeve 32. The top surface of the unlocking pressing post 31 does not extend to the outside of the protective sleeve 32. The top of the protective sleeve 32 is also provided with a limiting ring 33, the inner diameter of which is smaller than the diameter of the unlocking pressing post 31.

[0038] like Figure 6 As shown, the end of the plug 24 away from the strap 3 has a notch 34, and the width of the notch 34 is greater than the width of the unlocking pressing post 31.

[0039] like Figure 2 As shown, the fixing plate 11 has an ear plate 35 on the side near the UHF sensor 1, and a strap hole 36 is provided on the ear plate 35, through which the strap 3 passes.

[0040] With the above structure, when the plug 24 is inserted into the slot 25, it presses the inclined surface of the telescopic limiting block 28, causing the telescopic limiting block 28 to retract into the telescopic groove 27. When the telescopic limiting block 28 aligns with the rectangular limiting hole 26, it automatically pops out under the action of spring 29, achieving limiting lock (at this time, spring 38 is compressed). When it is necessary to remove the strap 3 to inspect or replace the UHF sensor 1, pressing down the unlocking press 31 can press the telescopic limiting block 28, causing it to retract into the telescopic groove 27. At this time, the plug 24 is pushed out by spring 38, leaving the slot 25. The notch 34 on the plug 24 ensures that the plug 24 is not obstructed by the unlocking press 31 during insertion or ejection from the slot 25. After the strap 3 passes through the strap hole 36, it can increase the contact area between the strap 3 and the insulating basin 2, increasing the fixation stability and preventing displacement.

Claims

1. A sensor mounting and fixing device for GIS partial discharge monitoring, comprising a UHF sensor (1), an insulating basin (2), a strap (3), and a GIS metal tube, wherein the GIS metal tube is provided with a flange (4) at its end, the insulating basin (2) is located between two adjacent flanges (4), the two flanges (4) are connected by multiple threaded rods (5) and fastening nuts (6), the UHF sensor (1) is fixed to the outside of the insulating basin (2) by the strap (3), and the UHF sensor (1) is also provided with ear holes (7) at both ends, characterized in that: Two straps (3) are provided. At both ends of the UHF sensor 1, a fixed seat (8) and a winding box (9) for automatically winding the strap (3) are installed on the threaded rod (5) close to it. The winding box (9) is fixed on the fixed seat (8). The first end of the strap (3) is fixed in the corresponding winding box (9), and the end passes through the corresponding ear hole (7) and is fixed to the top of the corresponding winding box (9). The fixed seat (8) includes two fixed rings (10) sleeved on both ends of the threaded rod (5) and a fixed plate (11) attached to the outside of the flange (4). The top of the fixed ring (10) is provided with a fixed rod (12) and a fixed nut (13) is installed. The two fixed rings (10) are fixed to both ends of the fixed plate (11) through the corresponding fixed rod (12) and the fixed nut (13).

2. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 1, characterized in that: Both ends of the fixing plate (11) are provided with strip-shaped through holes (14). The fixing rod (12) can move in the strip-shaped through holes (14) along the left and right and up and down directions. The fixing rod (12) is provided with external threads, and the fixing nut (13) cooperates with it and presses on the fixing plate (11).

3. A sensor mounting and fixing device for GIS partial discharge monitoring according to claim 1 or 2, characterized in that: At the end of the threaded rod (5), a second fixing nut (15) is also installed on the outside of the fixing ring (10), and the second fixing nut (15) is the same model as the fastening nut (6).

4. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 1, characterized in that: The winding box (9) is rotatably provided with a winding rod (16). The winding box (9) is provided with support covers (17) corresponding to the two ends of the winding rod (16). The winding rod (16) passes through the support cover (17) and is rotatably connected to it. The support cover (17) is provided with a spring (18). The two ends of the spring (18) are respectively connected and fixed to the winding rod (16) and the inner wall of the support cover (17).

5. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 4, characterized in that: The winding box (9) is provided with a fixed clamping plate (19). A threaded moving rod (20) is provided on the side of the winding box (9) away from the UHF sensor (1). The fixed clamping plate (19) is pushed by the threaded moving rod (20) to move towards the strap (3) wound on the winding rod (16) for clamping. At least two support rods (21) are provided on the side of the fixed clamping plate (19) away from the strap (3). The other end of the support rod (21) passes through the side wall of the winding box (9) and is fixed with an anti-detachment ring (22). A spring (23) is provided between the anti-detachment ring (22) and the outer wall of the winding box (9). The spring (23) is sleeved on the support rod (21).

6. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 5, characterized in that: The bottom of the fixing plate (11) and the side of the fixing clamp (19) near the strap (3) are provided with flexible rubber pads (37).

7. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 1, characterized in that: The end of the strap (3) is fixed with a plug (24), the top of the winding box (9) is provided with a slot (25), the plug (24) is provided with a rectangular limiting hole (26), the bottom of the slot (25) is provided with a telescopic groove (27), and a telescopic limiting block (28) is provided inside, which slides up and down. The top surface of the telescopic limiting block (28) is inclined and can be inserted into the rectangular limiting hole (26). The telescopic groove (27) is provided with a second spring (29), and the second spring (29) is connected and fixed to the bottom wall of the telescopic groove (27) and the telescopic limiting block (28).

8. The sensor mounting and fixing device for GIS partial discharge monitoring according to claim 7, characterized in that: The slot (25) has a through hole (30) at the top and an unlocking pressing post (31) that slides up and down inside. The slot (25) has a spring three (38) at the sealed end. The spring three (38) presses against the plug (24). The outer end of the through hole (30) is connected to a protective sleeve (32). The top surface of the unlocking pressing post (31) does not extend to the outside of the protective sleeve (32). The top of the protective sleeve (32) is also provided with a limiting ring (33). The inner diameter of the limiting ring (33) is smaller than the diameter of the unlocking pressing post (31).

9. A sensor mounting and fixing device for GIS partial discharge monitoring according to claim 8, characterized in that: The plug (24) has a notch (34) at the end away from the strap (3), and the width of the notch (34) is greater than the width of the unlocking pressing post (31).

10. A sensor mounting and fixing device for GIS partial discharge monitoring according to claim 1, characterized in that: The fixing plate (11) has an ear plate (35) on the side near the UHF sensor (1), and a strap hole (36) is provided on the ear plate (35), through which the strap (3) passes.

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