Grounding structure and test system for shielding layer of high-voltage line
By installing a combination of shielding sleeve and shielding ring, the problem of unreliable grounding of the high-voltage line shielding layer was solved, and the stability and consistency of EMC test results were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-06
AI Technical Summary
Unreliable grounding of the shielding layer of high-voltage lines leads to inconsistent EMC test results. Conventional copper foil pasting methods are prone to detachment and oxidation, resulting in increased grounding impedance.
The structure adopts a shielding sleeve, a first shielding ring, and a second shielding ring. The shielding layer of the high-voltage line is sandwiched between the two, and stable grounding is ensured by fasteners, clamping components, and elastic seals.
Stable and reliable grounding of the high-voltage line shielding layer was achieved, ensuring the consistency of EMC test results.
Smart Images
Figure CN223978244U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-voltage line testing technology, and in particular to a grounding structure and testing system for a high-voltage line shielding layer. Background Technology
[0002] In EMC (Electromagnetic Compatibility) testing of high-voltage power line products, the performance of the shielding layer has a significant impact on the test results. Many EMC failures are due to unreliable grounding of the shielding layer. High-voltage shielded cables require grounding at both ends: one end is a connector provided by the supplier, and the other end is connected to the shielding box.
[0003] However, for some high-voltage line products, due to their lower power and smaller cross-sectional area, it is impossible to fix the shielding layer of the high-voltage line to the shielding box using conventional gland connectors. The usual solution is to ground the shielding layer of the high-voltage line by attaching copper foil. However, this method of grounding the shielding layer has the following problems: the copper foil adhesion is unreliable, and there is a possibility of the copper foil falling off. Furthermore, the copper foil is prone to oxidation, leading to increased grounding impedance after prolonged use and poor EMC consistency.
[0004] Therefore, a grounding structure and testing system for high-voltage line shielding is needed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a grounding structure and testing system for high-voltage line shielding layers, which can ensure stable and reliable grounding of the high-voltage line shielding layers, thereby ensuring the consistency of EMC results.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] For grounding structures used in high-voltage line shielding layers, including:
[0008] The shielding sleeve is fixedly mounted on the shielding box, and the first end of the shielding sleeve extends out relative to the shielding box, allowing the high-voltage line to pass through the shielding sleeve and extend into the shielding box.
[0009] A first shielding ring and a second shielding ring are provided. The first shielding ring is sleeved on the second shielding ring and passes through the first end of the mounting shielding sleeve. The end of the second shielding ring is in contact with the mounting shielding sleeve. The shielding layer of the high-voltage line is sandwiched between the first shielding ring and the second shielding ring.
[0010] In some embodiments, a fastener is further included, which is disposed on the second end of the mounting shielding sleeve located in the shielding box, and the mounting shielding sleeve is connected to the shielding box via the fastener.
[0011] In some embodiments, the second end of the mounting shield has a first external thread, and the fastener is a nut that is screwed into the first external thread.
[0012] In some embodiments, the mounting shielding sleeve has a positioning part, the end face of which is fitted to the outer surface of the shielding box.
[0013] In some embodiments, the end of the second shielding ring that fits against the mounting shielding sleeve has an annular protrusion, and a portion of the shielding layer is sandwiched between the first shielding ring and the annular protrusion.
[0014] In some embodiments, a clamping component is further included, which is disposed at the first end of the mounting shield and abuts against the first shielding ring, such that the second shielding ring fits against the mounting shield.
[0015] In some embodiments, the clamping assembly includes a shielding clamping sleeve and an elastic seal. The elastic seal is sleeved on the high-voltage line and abuts against the end of the first shielding ring away from the annular protrusion. The shielding clamping sleeve is sleeved on the elastic seal and is connected to the first end of the shielding sleeve, and the shielding clamping sleeve abuts against the elastic seal.
[0016] In some embodiments, the first end of the mounting shielding sleeve has a second external thread, and the shielding clamping sleeve is screwed to the second external thread.
[0017] In some embodiments, the shielding compression sleeve has an installation groove, and the elastic seal is embedded in the installation groove.
[0018] The testing system includes a shielded box and a grounding structure for the high-voltage line shielding layer as described above, wherein the grounding structure for the high-voltage line shielding layer is disposed at an opening in the shielded box.
[0019] The beneficial effects of this utility model are:
[0020] This utility model provides a grounding structure for the shielding layer of a high-voltage line. A shielding sleeve is fixedly mounted on a shielding box, with its first end extending outwards from the box. A first shielding ring is fitted over a second shielding ring, passing through the first end of the shielding sleeve. The end of the second shielding ring is in contact with the shielding sleeve. The shielding layer of the high-voltage line is sandwiched between the first and second shielding rings. Because the shielding layer is sandwiched between these rings, they effectively fix and clamp the shielding layer. The end of the second shielding ring is in contact with the shielding sleeve, thus grounding the high-voltage line shielding layer through the second shielding ring, the shielding sleeve, and the shielding box. This method ensures stable and reliable grounding of the high-voltage line shielding layer, thereby guaranteeing consistent EMC results.
[0021] The present invention provides a testing system including a shielded box and a grounding structure for the high-voltage line shielding layer as described above, which can ensure stable and reliable grounding of the high-voltage line shielding layer, thereby ensuring the consistency of EMC results. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of a grounding structure for a high-voltage line shielding layer according to the present invention;
[0024] Figure 2 This is a cross-sectional view of a grounding structure for a high-voltage line shielding layer according to the present invention.
[0025] In the picture:
[0026] 1. Shielding sleeve; 11. Positioning part; 12. First end; 13. Second end; 2. High voltage line; 21. Shielding layer; 3. First shielding ring; 4. Second shielding ring; 41. Annular protrusion; 5. Compression assembly; 51. Elastic seal; 52. Shielding compression sleeve; 6. Fastener; 100. Shielding box. Detailed Implementation
[0027] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.
[0028] In this application, the terms "comprising," "including," "having," 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 limitation, 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 that element.
[0029] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.
[0030] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0031] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.
[0032] When performing EMC testing on high-voltage lines, in order to ensure the stable and reliable grounding of the high-voltage line shielding layer, and thus ensure the consistency of EMC results, such as... Figures 1-2 As shown, this utility model provides a grounding structure for a high-voltage line shielding layer. The grounding structure for a high-voltage line shielding layer includes a shielding sleeve 1, a first shielding ring 3, and a second shielding ring 4.
[0033] The shielding sleeve 1 is fixedly mounted on the shielding box 100, with its first end 12 extending out of the shielding box 100, allowing the high-voltage line 2 to pass through the shielding sleeve 1 and enter the shielding box 100. A first shielding ring 3 is fitted onto a second shielding ring 4, passing through the first end 12 of the shielding sleeve 1, and the end of the second shielding ring 4 is in contact with the shielding sleeve 1. The shielding layer 21 of the high-voltage line 2 is sandwiched between the first shielding ring 3 and the second shielding ring 4.
[0034] Since the shielding layer 21 of the high-voltage line 2 is sandwiched between the first shielding ring 3 and the second shielding ring 4, the first shielding ring 3 and the second shielding ring 4 serve to fix and clamp the shielding layer 21. The end of the second shielding ring 4 is fitted with the mounting shielding sleeve 1, so that the shielding layer 21 of the high-voltage line 2 is grounded through the second shielding ring 4, the mounting shielding sleeve 1, and the shielding box 100. By adopting the above method, the grounding of the shielding layer 21 of the high-voltage line 2 can be guaranteed to be stable and reliable, thereby ensuring the consistency of EMC results.
[0035] In some embodiments, the grounding structure for the high-voltage line shielding layer further includes a fastener 6, which is disposed on the second end 13 of the shielding sleeve 1 located in the shielding box 100. The shielding sleeve 1 is connected to the shielding box 100 via the fastener 6. By providing the fastener 6, it is convenient to install and fix the shielding sleeve 1 on the shielding box 100, and the stability of the shielding sleeve 1 installed on the shielding box 100 can be guaranteed.
[0036] In some embodiments, the second end 13 of the mounting shield 1 has a first external thread, and the fastener 6 is a nut, which is screwed onto the first external thread. During installation, the second end 13 of the mounting shield 1 is inserted into the opening of the shielding box 100, and then the nut is used to lock the second end 13 of the mounting shield 1, so that the mounting shield 1 is fixed on the shielding box 100. By engaging the fastener 6 with the first external thread, the mounting shield 1 can be quickly fixed on the shielding box 100, and it is easy to install and remove. In other embodiments, a positioning hole can also be opened radially along the second end 13 of the mounting shield 1, and a positioning pin can pass through the positioning hole to fix the mounting shield 1 on the shielding box 100; no further restrictions are imposed here.
[0037] In some embodiments, the mounting shielding sleeve 1 has a positioning part 11, the end face of which is in contact with the outer surface of the shielding box 100. By providing the positioning part 11, after the mounting shielding sleeve 1 is fixed on the shielding box 100, it can be ensured that the mounting shielding sleeve 1 is in stable contact with the shielding box 100, thereby ensuring the stability of subsequent grounding through the shielding box 100.
[0038] In some embodiments, the end of the second shielding ring 4 that fits against the mounting shielding sleeve 1 has an annular protrusion 41, and a portion of the shielding layer 21 is sandwiched between the first shielding ring 3 and the annular protrusion 41. By providing the annular protrusion 41, on the one hand, the stability of clamping the shielding layer 21 can be further improved, and on the other hand, the contact area between the second shielding ring 4 and the mounting shielding sleeve 1 can be increased, thereby ensuring the stability of the shielding grounding.
[0039] In some embodiments, the high-voltage line shielding grounding structure further includes a clamping component 5, which is disposed at the first end 12 of the mounting shielding sleeve 1 and abuts against the first shielding ring 3, so that the second shielding ring 4 fits snugly against the mounting shielding sleeve 1. By providing the clamping component 5, the second shielding ring 4 can be stably fitted against the mounting shielding sleeve 1, thereby ensuring the stability of the shielding grounding.
[0040] In some embodiments, the clamping assembly 5 includes a shielding clamping sleeve 52 and an elastic seal 51. The elastic seal 51 is sleeved on the high-voltage line 2 and abuts against the end of the first shielding ring 3 away from the annular protrusion 41. The shielding clamping sleeve 52 is sleeved on the elastic seal 51 and is connected to the first end 12 of the mounting shielding sleeve 1, and abuts against the elastic seal 51. In this embodiment, the elastic seal 51 is made of rubber. After the shielding clamping sleeve 52 is connected to the first end 12 of the mounting shielding sleeve 1, the elastic seal 51 undergoes elastic deformation, thereby clamping the first shielding ring 3, thus stably clamping the shielding layer 21 of the high-voltage line 2. The pressure on the first shielding ring 3 acts on the annular protrusion 41 of the second shielding ring 4, making the annular protrusion 41 stably fit with the mounting shielding sleeve 1, ensuring the stability of the shielding grounding.
[0041] In some embodiments, the first end 12 of the mounting shielding sleeve 1 has a second external thread, and the shielding clamping sleeve 52 is screwed to the second external thread. This arrangement facilitates the connection between the shielding clamping sleeve 52 and the mounting shielding sleeve 1. In other embodiments, the shielding clamping sleeve 52 can also be mounted on the mounting shielding sleeve 1 by bonding or welding; no further restrictions are imposed here.
[0042] In some embodiments, the shielding clamping sleeve 52 has a mounting groove, and the elastic seal 51 is embedded in the mounting groove. By providing the mounting groove, the elastic seal 51 can be positioned and installed.
[0043] This application also provides a testing system, including a shielded box 100 and the above-mentioned grounding structure for the high-voltage line shielding layer. The grounding structure for the high-voltage line shielding layer is set at the opening of the shielded box 100, which can ensure that the grounding of the high-voltage line 2 shielding layer 21 is stable and reliable, thereby ensuring the consistency of EMC results.
[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A high-voltage line shield ground structure, characterized in that The utility model relates to a high voltage line shielding layer grounding structure, comprising: a mounting shield sleeve (1) fixedly arranged on a shielding box (100), a first end (12) of the mounting shield sleeve (1) extending out of the shielding box (100), and a high voltage line (2) capable of penetrating into the shielding box (100) through the mounting shield sleeve (1); a first shielding ring (3) and a second shielding ring (4), the first shielding ring (3) being sleeved on the second shielding ring (4), the first shielding ring (3) penetrating the first end (12) of the mounting shield sleeve (1), and an end of the second shielding ring (4) abutting against the mounting shield sleeve (1), a shielding layer (21) of the high voltage line (2) being clamped between the first shielding ring (3) and the second shielding ring (4).
2. The high voltage line shield ground structure of claim 1, wherein, Further comprising a fastener (6) arranged on the second end (13) of the mounting shield sleeve (1) on the shielding box (100), the mounting shield sleeve (1) being connected with the shielding box (100) through the fastener (6).
3. The high voltage line shield ground structure of claim 2, wherein, The second end (13) of the mounting shield sleeve (1) has a first external thread, the fastener (6) is a nut, and the fastener (6) is screwed with the first external thread.
4. The high voltage line shield ground structure of claim 1, wherein, The mounting shield sleeve (1) has a positioning portion (11), an end surface of the positioning portion (11) abutting against an outer surface of the shielding box (100).
5. The high voltage line shield ground structure of claim 1, wherein, An end of the second shielding ring (4) abutting against the mounting shield sleeve (1) has an annular protrusion (41), and part of the shielding layer (21) is clamped between the first shielding ring (3) and the annular protrusion (41).
6. The high voltage line shield ground structure of claim 5, wherein, Further comprising a pressing assembly (5) arranged on the first end (12) of the mounting shield sleeve (1), and the pressing assembly (5) abutting against the first shielding ring (3) so that the second shielding ring (4) abuts against the mounting shield sleeve (1).
7. The high voltage line shield ground structure of claim 6, wherein, The pressing assembly (5) comprises a shielding pressing sleeve (52) and an elastic sealing member (51), the elastic sealing member (51) being sleeved on the high voltage line (2) and abutting against an end of the first shielding ring (3) away from the annular protrusion (41), the shielding pressing sleeve (52) being sleeved on the elastic sealing member (51), the shielding pressing sleeve (52) being connected with the first end (12) of the mounting shield sleeve (1), and the shielding pressing sleeve (52) abutting against the elastic sealing member (51).
8. The high voltage line shield ground structure of claim 7, wherein, The first end (12) of the mounting shield sleeve (1) has a second external thread, and the shielding pressing sleeve (52) is screwed with the second external thread.
9. The high voltage line shield ground structure of claim 7, wherein, An installation groove is formed in the shielding pressing sleeve (52), and the elastic sealing member (51) is embedded in the installation groove.
10. A test system characterized by, The utility model relates to a high voltage line shielding layer grounding structure, comprising: a mounting shield sleeve (1) fixedly arranged on a shielding box (100), a first end (12) of the mounting shield sleeve (1) extending out of the shielding box (100), and a high voltage line (2) capable of penetrating into the shielding box (100) through the mounting shield sleeve (1); a first shielding ring (3) and a second shielding ring (4), the first shielding ring (3) being sleeved on the second shielding ring (4), the first shielding ring (3) penetrating the first end (12) of the mounting shield sleeve (1), and an end of the second shielding ring (4) abutting against the mounting shield sleeve (1), a shielding layer (21) of the high voltage line (2) being clamped between the first shielding ring (3) and the second shielding ring (4). Further comprising a fastener (6) arranged on the second end (13) of the mounting shield sleeve (1) on the shielding box (100), the mounting shield sleeve (1) being connected with the shielding box (100) through the fastener (6). The second end (13) of the mounting shield sleeve (1) has a first external thread, the fastener (6) is a nut, and the fastener (6) is screwed with the first external thread. The mounting shield sleeve (1) has a positioning portion (11), an end surface of the positioning portion (11) abutting against an outer surface of the shielding box (100). An end of the second shielding ring (4) abutting against the mounting shield sleeve (1) has an annular protrusion (41), and part of the shielding layer (21) is clamped between the first shielding ring (3) and the annular protrusion (41). Further comprising a pressing assembly (5) arranged on the first end (12) of the mounting shield sleeve (1), and the pressing assembly (5) abutting against the first shielding ring (3) so that the second shielding ring (4) abuts against the mounting shield sleeve (1). The pressing assembly (5) comprises a shielding pressing sleeve (52) and an elastic sealing member (51), the elastic sealing member (51) being sleeved on the high voltage line (2) and abutting against an end of the first shielding ring (3) away from the annular protrusion (41), the shielding pressing sleeve (52) being sleeved on the elastic sealing member (51), the shielding pressing sleeve (52) being connected with the first end (12) of the mounting shield sleeve (1), and the shielding pressing sleeve (52) abutting against the elastic sealing member (51). The first end (12) of the mounting shield sleeve (1) has a second external thread, and the shielding pressing sleeve (52) is screwed with the second external thread. An installation groove is formed in the shielding pressing sleeve (52), and the elastic sealing member (51) is embedded in the installation groove. The utility model relates to a high voltage line shielding layer grounding structure, comprising: a shielding box (100) and the high voltage line shielding layer grounding structure according to claim 1, the high voltage line shielding layer grounding structure being arranged at an opening of the shielding box (100).