Gap-adjustable self-adaptive sealing arc-proof high-voltage shielding case

Abstract

The utility model discloses a gap-adjustable self-adaptive sealing arc-proof high-voltage shielding case, and relates to the technical field of shielding cases. Comprising a first splicing structure, a second splicing structure is inserted into the outer wall of the first splicing structure, a sealing structure is clamped to the outer wall of the first splicing structure, a bolt is slidably connected to the inner wall of the sealing structure, an inner shielding structure is in threaded connection with the outer wall of the bolt, and the inner shielding structure is in threaded connection with an inner threaded pipe through cooperation of the bolt and the inner threaded pipe. The height of the inner shielding structure in the shielding case main body can be finely adjusted, the inner and outer shielding gaps can be dynamically adjusted, the electric field distribution is uniform, the electric field balance requirements under different voltage grades can be effectively met, and compared with a traditional fixed gap shielding case, the arc discharge risk is reduced; the shielding cover body is extruded to fill a splicing gap, so that external water vapor and dust can be prevented from entering, and the shielding cover body can cover the gap through elastic deformation when the size of the shielding cover body is changed due to temperature change.

Description

An adjustable gap adaptive sealing arc-proof high-voltage shielding cover Technical Field

[0001] This utility model relates to the field of shielding technology, specifically an adjustable gap type adaptive sealing anti-arc high voltage shielding cover. Background Technology

[0002] During the operation of high-voltage power transmission and transformation equipment, the shielding cover is a key component for preventing arc discharge and ensuring the insulation performance of the equipment. Its sealing effect and electric field regulation capability are of paramount importance. Traditional high-voltage shielding covers mostly adopt a fixed structure design, and the size of the shielding gap is difficult to dynamically adjust according to the voltage level. Under different operating conditions, uneven electric field distribution is prone to occur. When the voltage fluctuates or the equipment is upgraded, the fixed gap is difficult to meet the electric field balance requirements, resulting in excessively high local electric field strength, which can trigger arc discharge and threaten the safe operation of the equipment. The existing shielding cover sealing structure mostly uses a single rubber strip or sealing ring to fill the gap. During long-term operation, the sealing components are prone to aging and deformation due to factors such as temperature changes and mechanical vibration, making it difficult to effectively prevent the intrusion of pollutants such as water vapor and dust. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an adjustable gap adaptive sealing arc-proof high-voltage shielding cover. Through dynamic gap adjustment and an adaptive sealing structure, the shielding cover improves operational safety and reliability under different voltage levels and complex environments.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an adjustable gap type adaptive sealing anti-arc high voltage shielding cover, including a first splicing structure, a second splicing structure inserted into the outer wall of the first splicing structure, a sealing structure snapped into the outer wall of the first splicing structure, a bolt slidably connected to the inner wall of the sealing structure, and an inner shielding structure threadedly connected to the outer wall of the bolt;

[0007] The first assembly structure includes a first shielding cover, the sidewalls of which are symmetrically provided with first placement grooves, and the outer wall of the first shielding cover is fixedly connected with a connecting plate. Both the inner wall of the connecting plate and the wall of the first shielding cover have first through holes. The second assembly structure includes a second shielding cover, the sidewalls of which are symmetrically provided with second placement grooves, and the outer wall of the second shielding cover is fixedly connected with an insertion plate. Both the inner wall of the insertion plate and the wall of the second shielding cover have second through holes. The outer wall of the first shielding cover is inserted into the outer wall of the insertion plate via the connecting plate, and the outer walls of the first and second shielding covers are in contact.

[0008] Preferably, the sealing structure includes a connecting frame with positioning holes in its wall. A sealing strip is symmetrically fixed to the outer wall of the connecting frame. The outer wall of the sealing strip engages with the outer wall of the first shielding cover via a first placement groove, and with the outer wall of the sealing strip engages with the outer wall of the second shielding cover via a second placement groove. The sealing strips of the sealing structure are inserted into the first and second placement grooves and, when compressed, fill the joint gaps. This not only prevents external moisture and dust from entering, but also allows the sealing cover to be covered by elastic deformation when temperature changes cause changes in the main body size of the shielding cover, thus preventing a decrease in insulation performance due to dirt or moisture.

[0009] Preferably, the inner shielding structure includes a shielding box, a support plate is fixedly connected to the inner wall of the shielding box, an internally threaded pipe is fixedly connected to the outer wall of the top of the support plate, and a limit ring is fixedly connected to the outer wall of the internally threaded pipe.

[0010] Preferably, the sidewalls of the shielding box are slidably connected to the sidewalls of the first shielding cover and the second shielding cover, respectively. The outer wall of the internally threaded tube is slidably connected to the inner wall of the first shielding cover and the inner wall of the second shielding cover, respectively. The inner wall of the internally threaded tube is threadedly connected to the outer wall of the bolt. The outer wall of the internally threaded tube is slidably connected to the inner wall of the connecting plate through the first through hole. The outer wall of the internally threaded tube is slidably connected to the inner wall of the insertion plate through the second through hole. The outer wall of the top of the limiting ring is in contact with the outer wall of the bottom of the connecting plate. Through the cooperation of the bolt and the internally threaded tube, the height of the inner shielding structure in the shielding cover body can be finely adjusted, and the gap between the inner and outer shielding can be dynamically adjusted to make the electric field distribution uniform and effectively meet the electric field balance requirements under different voltage levels. Compared with traditional fixed gap shielding covers, it reduces the risk of arc discharge and improves the operational safety of high-voltage equipment.

[0011] (III) Beneficial Effects

[0012] This invention provides an adjustable gap type adaptive sealing arc-proof high-voltage shield. It has the following beneficial effects:

[0013] (I) This high-voltage shielding cover can finely adjust the height of the inner shielding structure within the main body of the shielding cover by the cooperation of bolts and internal threaded pipes, dynamically adjust the gap between the inner and outer shielding, so that the electric field distribution is uniform and effectively meet the electric field balance requirements under different voltage levels. Compared with traditional fixed gap shielding covers, it reduces the risk of arc discharge and improves the operational safety of high-voltage equipment.

[0014] (ii) The high-voltage shielding cover is inserted into the first and second placement slots by the sealing strip of the sealing structure. After being squeezed, it fills the joint gap. It can prevent external moisture and dust from entering. When the main body size of the shielding cover changes due to temperature changes, it can cover the gap through elastic deformation, so as to avoid the decrease in insulation performance caused by dirt or moisture and improve the reliability of the shielding cover in complex environments. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is an exploded structural diagram of the present invention;

[0017] Figure 3 is a structural schematic diagram of the first assembled structure of this utility model;

[0018] Figure 4 is a schematic diagram of the second assembly structure of this utility model;

[0019] Figure 5 is a schematic diagram of the sealing structure of this utility model;

[0020] Figure 6 is a schematic diagram of the internal structure of the inner shielding structure of this utility model.

[0021] In the diagram: 1. First assembly structure; 2. Second assembly structure; 3. Sealing structure; 4. Bolt; 5. Inner shielding structure; 11. First shielding cover; 12. First placement groove; 13. Connecting plate; 14. First through hole; 21. Second shielding cover; 22. Second placement groove; 23. Insertion plate; 24. Second through hole; 31. Connecting frame; 32. Positioning hole; 33. Sealing strip; 51. Shielding box; 52. Support plate; 53. Internally threaded pipe; 54. Limiting ring. Detailed Implementation

[0022] 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.

[0023] Please refer to Figures 1-6. This utility model provides a technical solution: an adjustable gap type adaptive sealing anti-arc high voltage shield, including a first splicing structure 1, a second splicing structure 2 inserted into the outer wall of the first splicing structure 1, a sealing structure 3 snapped into the outer wall of the first splicing structure 1, a bolt 4 slidably connected to the inner wall of the sealing structure 3, and an inner shielding structure 5 threadedly connected to the outer wall of the bolt 4.

[0024] The first assembly structure 1 includes a first shielding cover 11, with first placement grooves symmetrically formed on the sidewalls of the first shielding cover 11. A connecting plate 13 is fixedly connected to the outer wall of the first shielding cover 11, and first through holes 14 are formed in the inner wall of the connecting plate 13 and the wall of the first shielding cover 11. The second assembly structure 2 includes a second shielding cover 21, with second placement grooves symmetrically formed on the sidewalls of the second shielding cover 21. An insertion plate 23 is fixedly connected to the outer wall of the second shielding cover 21, and second through holes 24 are formed in the inner wall of the insertion plate 23 and the wall of the second shielding cover 21. The outer wall of the shield 11 is connected to the outer wall of the insertion plate 23 via the connecting plate 13. The outer walls of the first shield 11 and the second shield 21 are in contact. First, the connecting plate 13 of the first splicing structure 1 is connected to the insertion plate 23 of the second splicing structure 2, so that the outer walls of the first shield 11 and the second shield 21 are fitted together to form a complete shield body. At this time, the sealing strip 33 of the sealing structure 3 is respectively inserted into the first placement groove 12 and the second placement groove 22. The splicing gap is covered by the connecting bracket 31, and the positioning hole 32 is aligned with the first through hole 14 and the second through hole 24.

[0025] The sealing structure 3 includes a connecting frame 31, with a positioning hole 32 in the wall of the connecting frame 31. A sealing strip 33 is symmetrically fixed to the outer wall of the connecting frame 31. The outer wall of the sealing strip 33 is engaged with the outer wall of the first shielding cover 11 via a first placement groove 12, and with the outer wall of the second shielding cover 21 via a second placement groove 22. The sealing strip 33 deforms under the pressure of the first and second placement grooves 12 and 22, filling the joint gap and preventing external moisture and dust from entering the shielding cover. Under high pressure, the inner shielding structure 5 and the outer shielding cover body form a double-layer shield, effectively suppressing arc discharge. The physical isolation effect of the sealing structure 3 improves the environmental adaptability of the shielding cover. Because the sealing strip 33 is compressed and fills the gap, when the external temperature decreases, causing the first and second shielding covers 11 and 21 to shrink, the joint gap widens. The sealing structure 3 then covers the gap, preventing a decrease in insulation performance due to dirt or moisture, and also covering the gap caused by temperature changes in the shielding cover.

[0026] The inner shielding structure 5 includes a shielding box 51. A support plate 52 is fixedly connected to the inner wall of the shielding box 51. An internally threaded tube 53 is fixedly connected to the outer wall of the top of the support plate 52. A limiting ring 54 is fixedly connected to the outer wall of the internally threaded tube 53. The shielding box 51 of the inner shielding structure 5 is inserted into the first through hole 14 and the second through hole 24 left in the shielding cover body. The internally threaded tube 53 passes through the first through hole 14 of the connecting plate 13 and the second through hole 24 of the insertion plate 23 in sequence. The top of the limiting ring 54 contacts the bottom of the connecting plate 13 to form an axial limit. The bolt 4 is rotated so that its outer thread engages with the inner wall of the internally threaded tube 53. As the bolt 4 is screwed down, when the bolt 4 is not fully tightened, the height of the inner shielding structure 5 in the shielding cover body can be adjusted by the support plate 52 and the shielding box 51, thereby adjusting the electric field distribution. When the bolt 4 is tightened, the limiting ring 54 presses the connecting plate 13, and the first splicing structure 1, the second splicing structure 2 and the inner shielding structure 5 are rigidly fixed.

[0027] The side walls of the shielding box 51 are slidably connected to the side walls of the first shielding cover 11 and the second shielding cover 21, respectively. The outer wall of the internally threaded tube 53 is slidably connected to the inner wall of the first shielding cover 11 and the inner wall of the second shielding cover 21, respectively. The inner wall of the internally threaded tube 53 is threadedly connected to the outer wall of the bolt 4. The outer wall of the internally threaded tube 53 is slidably connected to the inner wall of the connecting plate 13 through the first through hole 14. The outer wall of the internally threaded tube 53 is slidably connected to the inner wall of the insertion plate 23 through the second through hole 24. The outer wall of the top of the limiting ring 54 is in contact with the outer wall of the bottom of the connecting plate 13.

[0028] When using this high-voltage shield, first insert the connecting plate 13 of the first splicing structure 1 and the insertion plate 23 of the second splicing structure 2 to make the outer wall of the first shield 11 and the second shield 21 fit together to form a complete shield body. At this time, the sealing strip 33 of the sealing structure 3 is respectively inserted into the first placement groove 12 and the second placement groove 22. The splicing gap is covered by the connecting bracket 31, and the positioning hole 32 is aligned with the first through hole 14 and the second through hole 24.

[0029] Subsequently, the shielding box 51 of the inner shielding structure 5 is inserted into the first through hole 14 and the second through hole 24 left in the shielding cover body, so that the internal threaded tube 53 passes through the first through hole 14 of the connecting plate 13 and the second through hole 24 of the insertion plate 23 in sequence. The top of the limiting ring 54 contacts the bottom of the connecting plate 13 to form an axial limit. The bolt 4 is rotated so that its outer thread engages with the inner wall of the internal threaded tube 53. As the bolt 4 is screwed down, when the bolt 4 is not fully tightened, the height of the inner shielding structure 5 in the shielding cover body can be adjusted by the support plate 52 and the shielding box 51, thereby adjusting the electric field distribution. When the bolt 4 is tightened, the limiting ring 54 presses the connecting plate 13, connecting the first splicing structure 1, the second splicing structure 2 and the inner shielding structure. 5. Rigidly fixed, the sealing strip 33 is deformed by the compression of the first placement groove 12 and the second placement groove 22, filling the splicing gap and preventing external moisture and dust from entering the shielding cover. Under high pressure, the inner shielding structure 5 and the outer shielding cover body form a double-layer shield, effectively suppressing arc discharge. The physical isolation effect of the sealing structure 3 improves the environmental adaptability of the shielding cover. Since the sealing strip 33 is compressed and fills the gap, when the external temperature decreases, the first shielding cover 11 and the second shielding cover 21 shrink, and the splicing gap becomes larger. The gap is blocked by the setting of the sealing structure 3, which not only avoids the decrease in insulation performance caused by dirt or moisture, but also covers the gap caused by temperature changes in the shielding cover, thereby achieving a sealing effect.

[0030] This shielding cover achieves rapid assembly through a plug-in splicing structure. The bolt 4 adjustment mechanism controls the height of the inner and outer shields as well as the gap with the main shielding cover, meeting the electric field balance requirements under different voltage levels. The snap-fit ​​design of the sealing strip 33 and the placement groove forms multiple seals, improving the ability to resist environmental interference. The cooperation between the limiting ring 54 and the bolt 4 ensures connection stability. Compared with traditional fixed-gap shielding covers, it can dynamically adapt to changes in operating conditions, reduce the risk of arc discharge, extend the service life of high-voltage equipment, and facilitate later disassembly and maintenance, reducing maintenance costs.

[0031] 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.

[0032] 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. An adjustable gap type adaptive sealing arc-proof high-voltage shielding cover, characterized in that: The system includes a first assembly structure (1), a second assembly structure (2) inserted into the outer wall of the first assembly structure (1), a sealing structure (3) snapped into the outer wall of the first assembly structure (1), a bolt (4) slidably connected to the inner wall of the sealing structure (3), and an inner shielding structure (5) threadedly connected to the outer wall of the bolt (4); the first assembly structure (1) includes a first shielding cover (11), and a first placement groove (12) symmetrically opened on the side wall of the first shielding cover (11). 1) The outer wall is fixedly connected to a connecting plate (13), and the inner wall of the connecting plate (13) and the wall of the first shield (11) are both provided with a first through hole (14); the second splicing structure (2) includes a second shield (21), the side wall of the second shield (21) is symmetrically provided with a second placement groove (22), the outer wall of the second shield (21) is fixedly connected to an insertion plate (23), and the inner wall of the insertion plate (23) and the wall of the second shield (21) are both provided with a second through hole (24).

2. The adjustable gap adaptive sealing arc-proof high-voltage shielding cover according to claim 1, characterized in that: The outer wall of the first shield (11) is connected to the outer wall of the insertion plate (23) via the connecting plate (13), and the outer wall of the first shield (11) is in contact with the outer wall of the second shield (21).

3. The adjustable gap adaptive sealing arc-proof high-voltage shielding cover according to claim 1, characterized in that: The sealing structure (3) includes a connecting frame (31), a positioning hole (32) is provided in the wall of the connecting frame (31), and sealing strips (33) are symmetrically fixedly connected to the outer wall of the connecting frame (31).

4. The adjustable gap adaptive sealing arc-proof high-voltage shielding cover according to claim 3, characterized in that: The outer wall of the sealing strip (33) is engaged with the outer wall of the first shield (11) through the first placement groove (12), and the outer wall of the sealing strip (33) is engaged with the outer wall of the second shield (21) through the second placement groove (22).

5. The adjustable gap adaptive sealing arc-proof high-voltage shielding cover according to claim 1, characterized in that: The inner shielding structure (5) includes a shielding box (51), a support plate (52) is fixedly connected to the inner wall of the shielding box (51), an internal threaded pipe (53) is fixedly connected to the outer wall of the top of the support plate (52), and a limit ring (54) is fixedly connected to the outer wall of the internal threaded pipe (53).

6. The adjustable gap adaptive sealing arc-proof high-voltage shielding cover according to claim 5, characterized in that: The sidewall of the shielding box (51) is slidably connected to the sidewall of the first shielding cover (11) and the sidewall of the second shielding cover (21), respectively. The outer wall of the internally threaded tube (53) is slidably connected to the inner wall of the first shielding cover (11) and the inner wall of the second shielding cover (21), respectively. The inner wall of the internally threaded tube (53) is threadedly connected to the outer wall of the bolt (4). The outer wall of the internally threaded tube (53) is slidably connected to the inner wall of the connecting plate (13) through the first through hole (14). The outer wall of the internally threaded tube (53) is slidably connected to the inner wall of the insertion plate (23) through the second through hole (24). The outer wall of the top of the limiting ring (54) is in contact with the outer wall of the bottom of the connecting plate (13).

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