A surge arrester shielding device

Abstract

This utility model relates to a surge arrester shielding device, including an insulating cover. The insulating cover comprises two bodies, which are combined to form a platform shape. The interior of the insulating cover is hollow, and both the top and bottom ends are missing. A connecting plate is provided on the outer side of each of the two bodies, and the two connecting plates are hinged together by a hinge shaft. A locking assembly is provided on the outer side of the two bodies, opposite to the connecting plate. This surge arrester shielding device uses a platform-shaped shielding cover with different opening diameters at the top and bottom. It can fit onto the outer side of surge arrester flanges of different sizes, eliminating the need for custom-made insulating covers for different sizes of surge arresters. When the flange diameter varies within a certain range, the platform-shaped conical shielding cover can adaptively wrap by adjusting its height. This avoids the problems of traditional cylindrical insulating covers being too loose and causing leakage, or too tight and difficult to install, which are caused by fixed dimensions. It significantly reduces the types of spare parts and lowers equipment management costs.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester technology, specifically to a surge arrester shielding device. Background Technology

[0002] In modern power systems, metal oxide surge arresters (MOAs) serve as core equipment for ensuring the safe and stable operation of power facilities, bearing a crucial mission. Their primary function is to comprehensively protect various high-voltage equipment within substations from lightning interference and overvoltage threats. When substation equipment is operating normally, MOAs exhibit high resistance characteristics, allowing only extremely weak microampere-level current to pass through. However, in extreme situations involving high voltage and large current, such as lightning strikes, they quickly switch to a low-resistance state, effectively guiding current based on their inherent characteristics to ensure other equipment is protected from lightning interference, thus greatly maintaining the safe operation of the power system.

[0003] However, metal oxide surge arresters inevitably age over time due to various factors such as the passage of time and complex working environments. To ensure that their performance consistently meets safe operating requirements, regularly conducting leakage current tests on metal oxide surge arresters is an indispensable task. This test allows for accurate assessment of the arrester's performance status, timely identification of potential problems, and timely implementation of appropriate measures.

[0004] However, this test faces severe challenges in practice. Stray currents generated between the arrester flange and the grading ring can easily interfere with the test data, leading to deviations and severely affecting the accurate assessment of the true performance of metal oxide arresters. Currently, existing technology mainly uses insulating covers to address this problem, shielding stray currents. However, existing insulating covers are typically cylindrical in design and have relatively uniform dimensions. For arresters of varying specifications, different sized insulating covers must be used, which undoubtedly increases equipment management costs and operational difficulty, is extremely inconvenient in practical applications, and greatly limits the improvement of work efficiency. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a surge arrester shielding device, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surge arrester shielding device, comprising an insulating cover;

[0007] The insulating cover includes two covers, which are combined to form a three-dimensional shape. The interior of the insulating cover is hollow and both the top and bottom ends are missing.

[0008] A connecting plate is provided on the outer side of both of the covers, and the two connecting plates are hinged together by a hinge shaft;

[0009] A locking assembly is provided on the outer side of the two covers and on the side opposite to the connecting plate for connecting and fixing the two covers.

[0010] A conductive plate is provided on the inner peripheral wall of the cover, and a connecting line electrically connected to the conductive plate is installed on the outer side of the cover.

[0011] Furthermore, the geometry of the conductive plate is adapted to the geometry of the inner peripheral wall of the cover, and its dimensions are in close contact with the inner peripheral wall of the cover.

[0012] Furthermore, a protective plate is integrally formed on the upper surface of the cover, and a rubber component is provided on the inner side of the protective plate.

[0013] Furthermore, the protective plate and the upper cross-section of the rubber component are both semi-circular.

[0014] Furthermore, the two protective plates are combined to form a circle.

[0015] Furthermore, both the cover and the protective plate are made of insulating plastic material.

[0016] Furthermore, the locking assembly includes a mounting block mounted on one of the housings;

[0017] Corresponding to the mounting block, a docking block is provided on another cover, and a bolt with one end threadedly connected to the docking block is provided through the interior of the mounting block.

[0018] Furthermore, a threaded through hole adapted to the bolt is provided inside the mating block.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] This surge arrester shielding device uses a platform-shaped shield with different opening diameters at the top and bottom. It can fit on the outside of surge arrester flanges of different sizes, eliminating the need for custom-made insulation covers for different sizes of surge arresters. When the flange diameter varies within a certain range, the platform's conical shield can adaptively wrap around the arrester by adjusting its height. This avoids the problems of traditional cylindrical insulation covers being too loose and causing leakage, or too tight and difficult to install, which are due to their fixed dimensions. It significantly reduces the types of spare parts and lowers equipment management costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2This is a schematic diagram of the unfolded structure of this utility model.

[0023] In the diagram: 1. Insulating cover; 101. Cover body; 102. Connecting plate; 103. Conductive plate; 104. Connecting wire; 105. Protective plate; 106. Rubber parts; 2. Locking assembly; 201. Mounting block; 202. Connecting block; 203. Bolt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-2 The surge arrester shielding device in this embodiment is suitable for testing surge arresters of different sizes;

[0026] Specifically, it includes an insulating cover 1; the insulating cover 1 includes two cover bodies 101, which are combined to form a three-dimensional shape, and the interior of the insulating cover 1 is hollow and both the top and bottom ends are missing; a connecting plate 102 is provided on the outer side of each of the two cover bodies 101, and the two connecting plates 102 are hinged together by a hinge shaft.

[0027] A locking assembly 2 is provided on the outer side of the two covers 101 and on the side opposite to the connecting plate 102 for connecting and fixing the two covers 101; a conductive plate 103 is provided on the inner peripheral wall of the cover 101, and a connecting line 104 electrically connected to the conductive plate 103 is installed on the outer side of the cover 101.

[0028] In actual installation, the two covers 101 are hinged to the hinge shaft via the connecting plate 102, forming an openable "flip-top" structure. This allows the insulating cover 1 to be installed without disassembling the surge arrester body. Simply open the two covers 101 around the hinge shaft, wrap them around the outside of the surge arrester flange, and then close them. This greatly simplifies the installation process and improves the ease of operation. Compared with the insulating covers that use straps for fixing in the prior art, this structure avoids the cumbersome binding process and significantly improves work efficiency.

[0029] Furthermore, the geometry of the conductive plate 103 is adapted to the geometry of the inner peripheral wall of the cover 101, and its size is in close fit to the inner peripheral wall of the cover 101. When the device is installed, the conductive plate 103 forms a conductive layer surrounding the flange, and is connected to the test device through the connecting line 104, thereby realizing the connection between the test device and the flange.

[0030] In actual installation, the insulating cover 1 with different diameters at the top and bottom and a truncated cone structure that is narrower at the top and wider at the bottom can fit tightly to the outside of the surge arrester flange. Moreover, the insulating cover 1 of the platform structure adapts to the changes in flange diameter of different surge arresters by its own gravity, forming a naturally transitioning wrapping structure. There is no need to customize the cover 101 separately for different sizes, which significantly improves versatility.

[0031] In addition, the platform-shaped insulating cover is composed of two symmetrical covers 101 connected by a hinge shaft and a locking assembly 2. During installation, it is only necessary to open the two covers 101, wrap the flange, and then quickly fix it with bolts 203. It is suitable for substation equipment in high-altitude or compact environments, greatly reducing the difficulty of installation.

[0032] Furthermore, in order to ensure the stability of the insulating cover 1 installed on the outside of the surge arrester, in this embodiment, a protective plate 105 is integrally formed on the upper end surface of the cover 101, and a rubber part 106 is provided on the inner side of the protective plate 105. The upper cross-sectional shape of the protective plate 105 and the rubber part 106 are both semi-circular, and the two protective plates 105 are combined to form a circle.

[0033] In actual installation, the combination of the protective plate 105 and the rubber part 106 forms a sealing structure for the upper end of the surge arrester flange. The semi-circular cross-section design can fit tightly against the outer edge of the flange, preventing external dust, moisture, etc. from entering the shielded area, avoiding the generation of additional leakage current due to environmental factors, and further improving the accuracy of test data. At the same time, the protective plate 105 and the cover 101 made of insulating plastic material ensure the insulation performance of the device itself and will not affect the normal operation of the surge arrester.

[0034] Both the cover 101 and the protective plate 105 are made of insulating plastic material to ensure the insulation performance of the entire device.

[0035] In detail, the locking assembly 2 includes a mounting block 201 mounted on one of the covers 101; corresponding to the mounting block 201, a mating block 202 is provided on the other cover 101, and a bolt 203 with one end threadedly connected to the mating block 202 is provided through the interior of the mounting block 201, and a threaded through hole adapted to the bolt 203 is provided inside the mating block 202.

[0036] In actual use, the locking component 2 adopts a structure of bolt 203 and threaded through hole. The two covers 101 can be fixed and separated by simple rotation. Compared with the tie fixing method in the prior art, the bolt 203 connection has higher reliability and can ensure that the device operates stably under high pressure environment, avoiding loosening problems caused by vibration and other factors.

[0037] The working principle of the above embodiments is as follows:

[0038] (1) Rotate the two covers 101 around the hinge axis to open them into an unfolded state, exposing the internal space. Place the opened covers 101 on the outside of the surge arrester flange, so that the rubber parts 106 of the protective plate 105 are attached to the outer edge of the upper end of the flange to ensure a seal. Rotate the two covers 101 to the closed state to align the mounting block 201 with the mating block 202. Tighten the bolts 203 to fix the two covers 101 together. Connect the connecting line 104 to the test device and then test the flange.

[0039] (2) When the surge arrester leakage current test is carried out, the stray current generated between the surge arrester flange and the equalizing ring will be captured by the conductive plate 103. Since the conductive plate 103 is connected to the test device through the connecting line 104, the test device can test the current generated on the flange.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surge arrester shielding device, characterized in that: Includes an insulating cover (1); The insulating cover (1) includes two cover bodies (101), which are combined to form a three-dimensional shape. The interior of the insulating cover (1) is hollow and both the top and bottom ends are missing. A connecting plate (102) is provided on the outer side of each of the two covers (101), and the two connecting plates (102) are hinged together by a hinge shaft; A locking assembly (2) is provided on the outer side of the two covers (101) and on the side opposite to the connecting plate (102) for connecting and fixing the two covers (101); A conductive plate (103) is provided on the inner peripheral wall of the cover (101), and a connecting line (104) electrically connected to the conductive plate (103) is installed on the outer side of the cover (101).

2. The arrester shielding device of claim 1, wherein: The geometry of the conductive plate (103) is adapted to the geometry of the inner peripheral wall of the cover (101), and it fits tightly to the inner peripheral wall of the cover (101) in terms of size.

3. The surge arrester shielding device according to claim 1, characterized in that: A protective plate (105) is integrally formed on the upper end surface of the cover (101), and a rubber part (106) is provided on the inner side of the protective plate (105).

4. A surge arrester shielding device according to claim 3, characterized in that: The protective plate (105) and the rubber part (106) both have a semi-circular cross-section.

5. A surge arrester shielding device according to claim 3, characterized in that: The two protective plates (105) are combined to form a circle.

6. A surge arrester shielding device according to claim 4, characterized in that: Both the cover (101) and the protective plate (105) are made of insulating plastic material.

7. A surge arrester shielding device according to claim 1, characterized in that: The locking assembly (2) includes a mounting block (201) mounted on one of the housings (101); Corresponding to the mounting block (201), a docking block (202) is provided on another cover (101), and a bolt (203) with one end threadedly connected to the docking block (202) is provided through the interior of the mounting block (201).

8. A surge arrester shielding device according to claim 7, characterized in that: A threaded through hole adapted to the bolt (203) is provided inside the mating block (202).

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