Partial discharge test adaptive device

Abstract

The utility model discloses a partial discharge test adaptive device, which comprises an insulating rod, a base, an ultrahigh frequency sensor, a plurality of telescopic rods and a plurality of shielding blocks, the base is arranged at one end of 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 base, and the telescopic rods can stretch out and draw back in the height direction of the base; the shielding blocks are arranged on the telescopic rods, the shielding blocks are spliced end to end along the peripheral side of the detection window to form a shielding cavity, and every two adjacent shielding blocks can relatively slide in the height direction of the base; the ultrahigh frequency sensor is arranged on the base and located in the shielding cavity; by means of the structure, interference signals can be prevented from entering the base to affect detection of the ultrahigh frequency sensor, the fitting degree between the 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 the technical field of GIS detection, and particularly relates to a partial discharge test adaptive device. Background Art

[0002] Sulfur hexafluoride enclosed gas insulated switchgear, internationally known as "gas insulated switchgear" for short GIS. It optimally combines primary equipment in a substation except for the transformer, including circuit breakers, disconnectors, earthing switches, voltage transformers, current transformers, arresters, busbars, cable terminals, incoming and outgoing line bushings, etc., into an organic whole; and partial discharge is the main cause of GIS insulation accidents. 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 detection of partial discharge in GIS, and many GIS insulation defects have been found 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 in 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, UHF sensors cannot meet the usage requirements of different scenarios;

[0006] 3. UHF sensors 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 partial discharge test adaptive device to solve the above problems. Content 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 proposes a partial discharge test adaptive device.

[0009] An embodiment of the utility model adopts the following technical solution to solve its technical problem: a partial discharge test adaptive device, including an insulating rod, a base, a UHF sensor, a plurality of telescopic rods, and a plurality of shielding blocks;

[0010] The base is installed at one end of the insulating rod and is provided with a detection window thereon;

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

[0012] The shielding blocks are installed on the telescopic rods. The shielding blocks are spliced end to end along the periphery of the detection window to form a shielding cavity, and adjacent shielding blocks can slide relative to each other in the height direction of the base.

[0013] The UHF sensor is arranged on the base and is located in the shielding cavity.

[0014] As one of the preferred embodiments of the present utility model, one of the adjacent two shielding blocks is provided with an inward concave sliding groove, and one of the adjacent two shielding blocks is provided with an outward convex sliding block. The sliding groove and the sliding block are arranged in the height direction of the base, and the sliding block is slidably arranged in the sliding groove to form a shielding cavity.

[0015] As one of the preferred embodiments of the present utility model, the telescopic rod includes a guide tube, a telescopic part and a reset member. The guide tube is installed on the base and is provided with a telescopic groove thereon. The telescopic part is connected to the shielding block. The telescopic part is slidably arranged in the telescopic groove. The reset member abuts between the bottom of the telescopic groove and the telescopic part for driving the telescopic part to reset.

[0016] As one of the preferred embodiments of the present utility model, the base includes an upper cover and a lower cover. The guide tube is installed on the inner bottom wall of the lower cover. The telescopic part passes through the upper cover and is connected to the shielding block. A limiting boss is arranged on the telescopic part and abuts against the inner top wall of the upper cover.

[0017] As one of the preferred embodiments of the present utility model, the telescopic part is connected to the shielding block through a detachable structure.

[0018] As one of the preferred embodiments of the present utility model, the detachable structure is set as a threaded connection structure.

[0019] As one of the preferred embodiments of the present utility model, the reset member is set as a spiral spring.

[0020] As one of the preferred embodiments of the present utility model, a partial discharge test adaptive device further includes a universal link connected to the other end of the insulating rod.

[0021] As one of the preferred embodiments of the present utility model, the insulating rod is set as an electric push rod.

[0022] As one of the preferred embodiments of the present utility model, the shielding block is made of soft magnetic material.

[0023] Advantages of the present utility model: A partial discharge test adaptive device includes an insulating rod, a base, a UHF sensor, a plurality of telescopic rods, and a plurality of shielding blocks; the base is installed at one end of the insulating rod and is provided with a detection window thereon; the telescopic rods are arranged at intervals around the detection window and are connected to the base, and the telescopic rods can be telescoped along the height direction of the base; the shielding blocks are installed on the telescopic rods, and the shielding blocks are spliced end to end along the circumference of the detection window to form a shielding cavity, and adjacent shielding blocks can slide relative to each other along the height direction of the base; the UHF sensor is arranged on the base and is located in the shielding cavity; through the above structure, not only can interference signals be prevented from entering the base and affecting the detection of the UHF sensor, but the design of the telescopic rods can improve the fitting degree between the base and the insulator, and at the same time, it can also adapt to insulators of different models and shapes, improving applicability. Description of the Drawings

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

[0025] Figure 1 is a schematic structural diagram of a partial discharge test adaptive device;

[0026] Figure 2 is an exploded view of a partial discharge test adaptive device;

[0027] Figure 3 is Figure 2 a partial enlarged view of area A in

[0028] Figure 4 is a cross-sectional view of a partial discharge test adaptive device;

[0029] Figure 5 is Figure 4 a partial enlarged view of area B in Detailed Embodiments

[0030] 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.

[0031] In the description of the present utility model, the meaning of "a plurality" is two or more. 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.

[0032] 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. It 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.

[0033] 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.

[0034] Referring to Figures 1 to 5 , a partial discharge test adaptive device, comprising an insulating rod 100, a base 200, a UHF sensor 300, a plurality of telescopic rods 400 and a plurality of shielding blocks 500;

[0035] The base 200 is installed at one end of the insulating rod 100 and is provided with a detection window thereon;

[0036] The telescopic rods 400 are arranged at intervals on the periphery of the detection window and are connected to the base 200. The telescopic rods 400 can be telescoped in the height direction of the base 200;

[0037] The shielding blocks 500 are installed on the telescopic rods 400. The shielding blocks 500 are spliced end to end along the periphery of the detection window to form a shielding cavity 600, and adjacent two shielding blocks 500 can slide relative to each other in the height direction of the base 200;

[0038] The UHF sensor 300 is arranged on the base 200 and is located inside the shielding cavity 600.

[0039] In the present utility model, as a preferred embodiment of the telescopic rod 400, the telescopic rod 400 includes a guiding tube 410, a telescopic part 420, and a reset member 430. The guiding tube 410 is installed on the base 200 and is provided with a telescopic groove 440 thereon. The telescopic part 420 is connected to the shielding block 500, and the telescopic part 420 is slidably disposed in the telescopic groove 440. The reset member 430 abuts between the bottom of the telescopic groove 440 and the telescopic part 420 for driving the telescopic part 420 to reset. During assembly, first insert the telescopic part 420 into the corresponding hole of the upper cover 210 from bottom to top, then install the shielding block 500 on one end of the telescopic part 420 outside the upper cover 210, then place the reset member 430 into the guiding tube 410, and push and compress the reset member 430 at the other end of the telescopic part 420 until at least part of it is inserted into the guiding tube 410. After the remaining telescopic rods 400 are assembled one by one according to the above process, connect the upper cover 210 and the lower cover 220 together. The preferred connection method is bolt connection. Finally, install the UHF sensor 300 on the base 200 and connect the insulating rod 100.

[0040] During use, the staff holds the insulating rod 100 and is located on the periphery of the GIS device. After lifting the UHF sensor 300 close to the insulator, continue to move towards the insulator until the shielding layer covers the insulator, so that the UHF sensor 300 is in closer contact with the surface of the insulator at the partial discharge test port. Further, since the shielding cavity is jointly formed by the telescopic rod 400 and multiple shielding blocks 500, and the telescopic rod 400 can be telescoped along the height direction of the base 200, thus adapting to insulators of different shapes, which 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 as follows: Through the above structure, it can not only prevent interference signals from entering the base and affecting the detection of the UHF sensor, but also the design of the telescopic rod can improve the fitting degree between the base and the insulator, and at the same time can adapt to insulators of different models and shapes, improving the applicability.

[0041] In one embodiment, a concave chute 510 is provided on one of the adjacent two shielding blocks 500, and a convex slider 520 is provided on one of the adjacent two shielding blocks 500. The chute 510 and the slider 520 are arranged along the height direction of the base 200 and the slider 520 is slidably disposed in the chute 510 to form a shielding cavity 600 by splicing. In this setting, through the cooperation of the chute 510 and the slider 520, not only can the relative sliding between the adjacent two shielding blocks 500 be realized, but also the fitting degree between the adjacent two shielding blocks 500 can be improved, thereby improving the tightness of the enclosed shielding cavity 600 and further improving the shielding effect on interference signals.

[0042] In one embodiment, the base 200 includes an upper cover 210 and a lower cover 220. The guiding tube 410 is installed on the inner bottom wall of the lower cover 220. The telescopic part 420 passes through the upper cover 210 and is connected to the shielding block 500. A limiting boss 450 that abuts against the inner top wall of the upper cover 210 is provided on the telescopic part 420.

[0043] In one embodiment, the telescopic part 420 is connected to the shielding block 500 through a detachable structure.

[0044] As a preferred embodiment of the detachable structure, the detachable structure is set as a threaded connection structure.

[0045] As a preferred embodiment of the reset member 430, the reset member 430 is set as a helical spring.

[0046] In one embodiment, a partial discharge test adaptive device further includes a universal link 700 connected to the other end of the insulating rod 100; this setting can meet the test requirements of GIS components at different positions and improve the adaptability.

[0047] As a preferred embodiment of the insulating rod 100, the insulating rod 100 is set as an electric push rod.

[0048] As a preferred embodiment of the shielding block 500, the shielding block 500 is made of soft magnetic material.

[0049] Of course, 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. An adaptive device for partial discharge testing, characterized in that: It includes an insulating rod (100), a base (200), a UHF sensor (300), a plurality of telescopic rods (400), and a plurality of shielding blocks (500); The base (200) is installed at one end of the insulating rod (100), and a detection window is provided thereon; The telescopic rods (400) are arranged at intervals on the periphery of the detection window and are connected to the base (200), and the telescopic rods (400) can be telescoped along the height direction of the base (200); The shielding blocks (500) are installed on the telescopic rods (400), and the shielding blocks (500) are spliced end to end along the periphery of the detection window to form a shielding cavity (600), and adjacent two of the shielding blocks (500) can slide relative to each other along the height direction of the base (200); The UHF sensor (300) is arranged on the base (200) and is located inside the shielding cavity (600).

2. The self-adaptive device for partial discharge test according to claim 1, wherein: One of the adjacent two shielding blocks (500) is provided with an inwardly concave chute (510), and one of the adjacent two shielding blocks (500) is provided with an outwardly convex slider (520). The chute (510) and the slider (520) are arranged along the height direction of the base (200), and the slider (520) is slidably arranged in the chute (510) to form the shielding cavity (600).

3. The self - adaptive device for partial discharge testing according to claim 1, characterized in that: The telescopic rod (400) includes a guide tube (410), a telescopic part (420), and a reset member (430). The guide tube (410) is installed on the base (200), and a telescopic groove (440) is provided thereon. The telescopic part (420) is connected to the shielding block (500), the telescopic part (420) is slidably arranged in the telescopic groove (440), and the reset member (430) abuts between the bottom of the telescopic groove (440) and the telescopic part (420) for driving the telescopic part (420) to reset.

4. An adaptive device for partial discharge testing according to claim 3, characterized in that: The base (200) includes an upper cover (210) and a lower cover (220). The guide tube (410) is installed on the inner bottom wall of the lower cover (220), the telescopic part (420) passes through the upper cover (210) and is connected to the shielding block (500), and a limiting boss (450) abutting against the inner top wall of the upper cover (210) is provided on the telescopic part (420).

5. An adaptive device for partial discharge testing according to claim 4, characterized in that: The telescopic part (420) is connected to the shielding block (500) through a detachable structure.

6. An adaptive device for partial discharge testing according to claim 5, characterized in that: The detachable structure is set as a threaded connection structure.

7. The self - adaptive device for partial discharge testing according to claim 3, characterized in that: The reset member (430) is set as a helical spring.

8. An adaptive partial discharge test device according to claim 1, characterized in that: It further includes a universal link (700) connected to the other end of the insulating rod (100).

9. An adaptive device for partial discharge testing according to claim 1, wherein: The insulating rod (100) is set as an electric push rod.

10. The adaptive device for partial discharge testing according to claim 1, wherein: The shielding block (500) is made of soft magnetic material.

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