Shielding device for partial discharge test sensor

Abstract

The utility model discloses a shielding device for a partial discharge test sensor. The shielding device comprises an insulating rod, a mounting seat, an ultrahigh frequency sensor, a shielding layer and a plurality of telescopic rods, the mounting seat is arranged on the insulating rod and is provided with a detection window; the telescopic rods are arranged on the peripheral side of the detection window at intervals and connected with the mounting seat, and the telescopic rods can stretch out and draw back in the height direction of the mounting seat; the shielding layer is arranged on the telescopic rod to define a shielding cavity; the ultrahigh frequency sensor is arranged on the mounting seat and is positioned in the shielding cavity; by means of the structure, interference signals can be prevented from entering the mounting base to affect detection of the ultrahigh frequency sensor, the fitting degree between the mounting base and the insulator can be improved through the design of the telescopic rod, meanwhile, insulators of different models and different shapes can be adapted, and applicability is improved.

Description

Technical Field

[0001] The utility model relates to a field, and particularly relates to a shielding device for a partial discharge test sensor. Background Art

[0002] Sulfur hexafluoride enclosed combined electrical appliances, internationally known as "gas insulated switchgear", abbreviated as GIS. It optimally combines primary equipment in a substation except for transformers, including circuit breakers, disconnectors, earthing switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, incoming and outgoing line bushings, etc., into an organic whole; and partial discharge is the main cause of insulation accidents in GIS. By detecting and judging internal defects through partial discharge detection means, insulation defect problems can be discovered earlier, and maintenance measures can be taken in time to eliminate risks.

[0003] UHF sensors are suitable for on-line partial discharge detection of GIS, and numerous insulation defects of GIS have been discovered in on-site applications, playing an important role in ensuring the safe and reliable operation of GIS equipment; however, in the prior art, when using UHF sensors to detect partial discharge of GIS, the following disadvantages exist:

[0004] 1. It requires staff to climb close to the insulator, increasing the risk of falling;

[0005] 2. Limited by factors such as the type and installation position of the insulator, the UHF sensor cannot meet the usage requirements of different scenarios;

[0006] 3. The UHF sensor cannot adhere well to the insulator, resulting in a large gap between the UHF sensor and the insulator, being greatly interfered by external electromagnetic signals, affecting the measurement results, and even causing misjudgment and wrong judgment, making it difficult to detect internal defects and leaving a great potential safety hazard;

[0007] Therefore, there is an urgent need for a shielding device for a partial discharge test sensor to solve the above problems. Summary of the Utility Model

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a shielding device for a partial discharge test sensor.

[0009] An embodiment of the utility model adopts the following technical solution to solve its technical problems: A shielding device for a partial discharge test sensor includes an insulating rod, a mounting seat, a UHF sensor, a shielding layer, and a plurality of telescopic rods;

[0010] The mounting seat is installed on the insulating rod and is provided with a detection window thereon;

[0011] The telescopic rods are arranged at intervals on the periphery of the detection window and are connected to the mounting base. The telescopic rods can be telescoped along the height direction of the mounting base.

[0012] The shielding layer is installed on the telescopic rods to enclose a shielding cavity.

[0013] The ultra-high frequency sensor is arranged on the mounting base and is located inside the shielding cavity.

[0014] As one of the preferred embodiments of the present utility model, the telescopic rod includes a mounting part, a telescopic part and a resetting member. The mounting part is installed on the mounting base and is provided with a telescopic groove thereon. The telescopic part is slidably arranged in the telescopic groove. The resetting member abuts between the bottom of the telescopic groove and the telescopic part for driving the telescopic part to reset.

[0015] As one of the preferred embodiments of the present utility model, the resetting member is arranged as a spiral spring.

[0016] As one of the preferred embodiments of the present utility model, a partial discharge test sensor shielding device further includes a limiting seat. A limiting platform located in the telescopic groove is arranged on one side of the telescopic part close to the mounting part. The mounting part is threadedly connected to the mounting base and the limiting seat so that the limiting platform abuts against the limiting seat.

[0017] As one of the preferred embodiments of the present utility model, a mounting hole is arranged on the side of the telescopic rod facing away from the mounting base. The shielding layer is connected to the mounting hole.

[0018] As one of the preferred embodiments of the present utility model, a mounting ring is arranged on the outer wall of the mounting base. The telescopic rod is installed on the mounting ring.

[0019] As one of the preferred embodiments of the present utility model, the ultra-high frequency sensor is connected to the mounting base through a bolt connection structure.

[0020] As one of the preferred embodiments of the present utility model, a partial discharge test sensor shielding device further includes a first adapter seat and a second adapter seat. One end of the first adapter seat is connected to the insulating rod, and the other end is rotatably connected to one end of the second adapter seat. The other end of the second adapter seat is connected to the mounting base.

[0021] As one of the preferred embodiments of the present utility model, the insulating rod is connected to the first adapter seat through a detachable structure.

[0022] As one of the preferred embodiments of the present utility model, the detachable structure is arranged as a threaded connection structure.

[0023] Advantages of the present utility model: A shielding device for a partial discharge test sensor, comprising an insulating rod, a mounting seat, a UHF sensor, a shielding layer, and a plurality of telescopic rods; the mounting seat is installed on the insulating rod and is provided with a detection window thereon; the telescopic rods are arranged at intervals on the periphery of the detection window and are connected to the mounting seat, and the telescopic rods can be telescoped along the height direction of the mounting seat; the shielding layer is installed on the telescopic rods to enclose a shielding cavity; the UHF sensor is arranged on the mounting seat and is located inside the shielding cavity; through the above structure, not only can interference signals be prevented from entering the mounting seat and affecting the detection of the UHF sensor, but the design of the telescopic rods can improve the fitting degree between the mounting seat and the insulator, and at the same time, it can also adapt to insulators of different models and shapes, improving the applicability. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is a schematic structural diagram of a shielding device for a partial discharge test sensor;

[0026] Figure 2 It is an exploded view of a shielding device for a partial discharge test sensor;

[0027] Figure 3 It is Figure 2 A partial enlarged view of area A in Detailed Description of the Embodiment

[0028] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0029] In the description of the present utility model, the meaning of "a plurality" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, and understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc., they are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected; they can be the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0032] Referring to Figures 1 to 3 , a partial discharge test sensor shielding device includes an insulating rod 10, a mounting base 20, a UHF sensor 30, a shielding layer, and a plurality of telescopic rods 40;

[0033] The mounting base 20 is installed on the insulating rod 10 and is provided with a detection window 21 thereon;

[0034] The telescopic rods 40 are arranged at intervals on the periphery of the detection window 21 and are connected to the mounting base 20. The telescopic rods 40 can be telescoped along the height direction of the mounting base 20;

[0035] The shielding layer is installed on the telescopic rods 40 to enclose a shielding cavity;

[0036] The UHF sensor 30 is arranged on the mounting base 20 and is located inside the shielding cavity.

[0037] In the present utility model, during assembly, the telescopic rods 40 are individually installed onto the mounting base 20 to enclose and form a mounting frame. Then, one end of the shielding layer (not shown in the figure) is connected to the mounting hole 60 of the telescopic rod 40, and the other end is connected to the other end of the telescopic rod 40 (the end close to the mounting base 20) or the mounting base 20, constructing a shielding cavity with an open lower end. The shielding cavity is arranged opposite to the detection window 21 on the mounting base 20. Then, the UHF sensor 30 is installed onto the mounting base 20 and located inside the shielding cavity. Finally, the insulating rod 10 is connected properly; during use, the staff holds the insulating rod 10 and stands on the periphery of the GIS device. After lifting the UHF sensor 30 close to the insulator, continue to move towards the insulator until the shielding layer wraps the insulator, making the UHF sensor 30 contact the surface of the insulator at the partial discharge test port more closely; further, since the shielding cavity is jointly formed by the telescopic rod 40 and the shielding layer, and the telescopic rod 40 can be telescoped along the height direction of the mounting base 20, thus adapting to insulators with different shapes. This not only improves the fitting degree and shielding property but also expands the applicability of the shielding device; the advantages of the present utility model are: through the above structure, it can not only prevent interference signals from entering the mounting base and affecting the detection of the UHF sensor, but also the design of the telescopic rod can improve the fitting degree between the mounting base and the insulator, and at the same time, it can adapt to insulators of different models and shapes, improving the applicability.

[0038] In one embodiment, the telescopic rod 40 includes a mounting portion 41, a telescopic portion 42, and a reset member 43. The mounting portion 41 is installed on the mounting base 20 and is provided with a telescopic groove 44. The telescopic portion 42 is slidably disposed in the telescopic groove 44. The reset member 43 abuts between the bottom of the telescopic groove 44 and the telescopic portion 42 for driving the telescopic portion 42 to reset; in a further embodiment, a limit seat 51 is further included. A limit platform 52 located in the telescopic groove 44 is provided on one side of the telescopic portion 42 close to the mounting portion 41. The mounting portion 41 is threadedly connected to the mounting base 20 and the limit seat 51 so that the limit platform 52 abuts against the limit seat 51; during installation, first, the mounting portion 41 is threadedly connected to the mounting base 20, then the reset member 43 is placed into the telescopic groove 44, and after the telescopic portion 42 is abutted against the reset member 4 and pushed into the telescopic groove 44, finally, the limit seat 51 is sleeved on the telescopic portion 42 and threadedly connected to the mounting portion 41 until the limit seat 51 abuts against the limit platform 52 on the telescopic portion 42 to realize the limitation of the telescopic portion 42.

[0039] As a preferred embodiment of the reset member 43, the reset member 43 is provided as a helical spring.

[0040] In one embodiment, a mounting hole 60 is provided on the side of the telescopic rod 40 facing away from the mounting base 20, and the shielding layer is connected to the mounting hole 60.

[0041] In one embodiment, an installation ring 70 is provided on the outer wall of the mounting base 20, and the telescopic rod 40 is installed on the installation ring 70; this arrangement can not only facilitate the installation of the telescopic rod 40, but also obtain a relatively large shielding cavity at a relatively low cost to meet the detection requirements of insulators of different sizes.

[0042] In one embodiment, the UHF sensor 30 is connected to the mounting base 20 through a bolt connection structure 71.

[0043] A partial discharge test sensor shielding device further includes a first adapter seat 81 and a second adapter seat 82. One end of the first adapter seat 81 is connected to the insulating rod 10, and the other end is rotatably connected to one end of the second adapter seat 82. The other end of the second adapter seat 82 is connected to the mounting base 20; this arrangement can make the angle between the insulating rod 10 and the mounting base 20 adjustable to meet the test requirements of insulators at different positions; it should be noted that the first adapter seat 81 can be integrally formed with the insulating rod 10, and the second adapter seat 82 can be integrally formed with the mounting base 20. Only by making the first adapter seat 81 and the second adapter seat 82 rotatably connected can the angle be adjustable.

[0044] In a further embodiment, the insulating rod 10 is connected to the first adapter seat 81 through a detachable structure 90.

[0045] As a preferred embodiment of the detachable structure 90, the detachable structure 90 is arranged as a threaded connection structure; this arrangement can very conveniently replace insulating rods 10 of different lengths to meet the test requirements of different positions and different heights of GIS equipment. Of course, the detachable structure 90 can also be a pin structure, etc., which will not be elaborated here.

[0046] Certainly, the present utility model is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A partial discharge test sensor shielding device, characterized in that: It comprises an insulating rod (10), a mounting seat (20), a UHF sensor (30), a shielding layer and a plurality of telescopic rods (40); The mounting seat (20) is mounted on the insulating rod (10) and is provided with a detection window (21); The telescopic rods (40) are arranged at intervals on the peripheral side of the detection window (21) and are connected to the mounting seat (20), and the telescopic rods (40) can be telescoped in a height direction along the mounting seat (20); The shielding layer is mounted on the telescopic rod (40) to enclose a shielding cavity; The ultra-high frequency sensor (30) is arranged on the mounting seat (20) and is located in the shielding cavity.

2. A partial discharge test sensor shielding device according to claim 1, characterized in that: The telescopic rod (40) comprises a mounting portion (41), a telescopic portion (42) and a reset member (43); the mounting portion (41) is mounted on the mounting seat (20) and is provided with a telescopic slot (44); the telescopic portion (42) is slidably arranged in the telescopic slot (44); the reset member (43) is abutted between the bottom of the telescopic slot (44) and the telescopic portion (42) and is used for driving the telescopic portion (42) to reset.

3. A partial discharge test sensor shielding device according to claim 2, characterized in that: The reset element (43) is configured as a coil spring.

4. A partial discharge test sensor shielding device according to claim 2, characterized in that: It also includes a limit seat (51), and a limit platform (52) located in the telescopic groove (44) is provided on one side of the telescopic portion (42) close to the mounting portion (41), and the mounting portion (41) is threadedly connected to the mounting seat (20) and the limit seat (51) so that the limit platform (52) abuts against the limit seat (51).

5. A partial discharge test sensor shielding device according to claim 1, characterized in that: A mounting hole (60) is provided on a side of the telescopic rod (40) facing away from the mounting seat (20), and the shielding layer is connected to the mounting hole (60).

6. A partial discharge test sensor shielding device according to claim 1, characterized in that: A mounting ring (70) is provided on the outer wall of the mounting seat (20), and the telescopic rod (40) is mounted on the mounting ring (70).

7. A partial discharge test sensor shielding device according to claim 1, characterized in that: The ultra-high frequency sensor (30) is connected to the mounting seat (20) via a bolt connection structure (71).

8. A partial discharge test sensor shielding device according to claim 1, characterized in that: It also includes a first adapter seat (81) and a second adapter seat (82), wherein one end of the first adapter seat (81) is connected to the insulating rod (10) and the other end is rotatably connected to one end of the second adapter seat (82), and the other end of the second adapter seat (82) is connected to the mounting seat (20).

9. A partial discharge test sensor shielding device according to claim 8, characterized in that: The insulating rod (10) is connected to the first adapter seat (81) via a detachable structure (90).

10. A partial discharge test sensor shielding device according to claim 9, characterized in that: The detachable structure (90) is configured as a threaded connection structure.

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