A cable grommet

Abstract

The utility model discloses a cable gasket belongs to high pressure transmission technical field, including the gasket body of strip shape, be provided with mounting hole on the gasket body, mounting hole is arranged three or more than three in turn in the length direction of gasket body, and the spacing of mounting hole close to the end face of gasket body from end face is less than the length of single mounting hole, and the spacing between adjacent mounting hole is less than the length of single mounting hole. The utility model is provided with mounting hole on the gasket body, and mounting hole is arranged in turn in the length direction of gasket body, and the setting of multiple mounting holes can reduce the processing precision requirement to cable gasket, reduce the installation difficulty degree of cable gasket and metal support, improve the adaptability of cable gasket.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power transmission technology, and in particular to a cable liner. Background Technology

[0002] In high-voltage transmission systems, cables are typically supported and secured by metal supports. However, if high-voltage cables are laid directly on metal supports, the supports may have burrs, protrusions, or rough surfaces. During long-term operation, the cable may creep due to thermal expansion and contraction or mechanical vibration, causing friction and wear between the outer insulation layer and the metal support. This wear not only reduces the lifespan of the cable's main insulation but may also damage the external insulation, leading to the following safety hazards:

[0003] Safety risks for maintenance personnel: After the insulation layer is damaged, the metal layer of the cable may become electrified, threatening the safety of maintenance personnel;

[0004] Discharge and fire risks: Partial discharge may occur between the metal layer and the support, which may even cause an electric arc fire;

[0005] Decreased system reliability: Deterioration of insulation performance may lead to cable breakdown or short circuit faults.

[0006] To avoid the aforementioned problems, existing technologies typically add cable gaskets to the metal bracket to isolate the cable from direct contact with the bracket. These gaskets are usually fixed with bolts; that is, mounting holes and connection holes are respectively made on the gasket and the bracket, and the connection is secured with bolts. However, this method has the following drawbacks:

[0007] High processing costs: If the mounting holes of the gasket and the bracket are required to be perfectly aligned, the processing accuracy of both needs to be improved, which leads to a significant increase in manufacturing costs;

[0008] Installation difficulties: If ordinary machining precision is used, the gasket mounting holes and bracket connection holes are prone to misalignment, requiring repeated adjustments and reducing construction efficiency;

[0009] Poor adaptability: Existing padding structures are difficult to be compatible with brackets or cables of different sizes, resulting in insufficient versatility.

[0010] Therefore, how to reduce processing costs and improve installation convenience while ensuring cable protection effectiveness has become a pressing technical problem to be solved in this field. Utility Model Content

[0011] The purpose of this utility model is to provide a cable liner to solve the problems existing in the prior art. The liner body is provided with mounting holes, which are arranged sequentially along the length of the liner body. The setting of multiple mounting holes can reduce the processing accuracy requirements of the cable liner, reduce the difficulty of installing the cable liner and the metal bracket, and improve the adaptability of the cable liner.

[0012] To achieve the above objectives, this utility model provides the following solution:

[0013] This utility model provides a cable liner, including a strip-shaped liner body, on which mounting holes are provided. Three or more mounting holes are arranged sequentially along the length of the liner body. The distance between the mounting holes near the end face of the liner body and the end face is less than the length of a single mounting hole, and the distance between adjacent mounting holes is less than the length of a single mounting hole.

[0014] In one embodiment, the mounting hole is strip-shaped, and the length direction of the mounting hole is consistent with the length direction of the pad body, and the length of the mounting hole is less than the width of the pad body.

[0015] In one embodiment, the mounting hole is located at the middle of the width direction of the gasket body.

[0016] In one embodiment, the mounting hole includes a first hole, a second hole, and a third hole arranged sequentially in the thickness direction of the gasket body, wherein the length and width of the first hole are both greater than those of the second hole, and the length and width of the third hole are both greater than those of the second hole.

[0017] In one embodiment, the width of the first hole is the same as the width of the third hole, and the length of the first hole is the same as the length of the third hole.

[0018] In one embodiment, the depth of the first hole is greater than the depth of the third hole, and the depth of the third hole is greater than the depth of the second hole.

[0019] In one embodiment, the surface of the pad body near the first hole is a first surface, and the edges of the first surface are all chamfered. The surface of the pad body near the third hole is a second surface, and the edges of the second surface are not chamfered.

[0020] In one embodiment, the second surface is provided with blind holes, the blind holes including first blind holes located on both sides of the width direction of the mounting hole and second blind holes located between the length direction of the mounting hole and the end face.

[0021] In one embodiment, the first blind hole is disposed corresponding to the mounting hole in the length direction of the gasket body, the length of the first blind hole is equal to the length of the third hole, and the width of the first blind hole is less than the width of the third hole.

[0022] In one embodiment, the second blind hole is respectively provided in the width direction of the pad body corresponding to the first blind hole and the mounting hole, the second blind hole corresponding to the first blind hole has the same width as the first blind hole, and the second blind hole corresponding to the mounting hole has the same width as the third hole.

[0023] The present invention achieves the following technical advantages over the prior art:

[0024] This invention provides three or more mounting holes on the liner body, arranged sequentially along the length of the liner body. The distance between adjacent mounting holes is less than the length of a single mounting hole, and the distance between the mounting hole and the end face of the liner body is also less than the length of a single mounting hole. When installing bolts, suitable mounting holes can be found on the liner body and installed in the appropriate position, thereby reducing the processing precision requirements of the cable liner, reducing the difficulty of installing the cable liner with the metal bracket, and improving the adaptability of the cable liner. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the first surface in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the second surface in an embodiment of the present invention;

[0028] Figure 3 This is a front view (first surface) in an embodiment of the present invention;

[0029] Figure 4 This is a bottom view (second surface) in an embodiment of the present invention;

[0030] Figure 5 for Figure 3 Sectional view of AA;

[0031] Figure 6 for Figure 3 BB section view;

[0032] Among them, 1. gasket body; 2. mounting hole; 3. first blind hole; 4. second blind hole; 5. chamfer; 6. first surface; 7. second surface;

[0033] 21. First hole; 22. Second hole; 23. Third hole. Detailed Implementation

[0034] 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.

[0035] The purpose of this utility model is to provide a cable liner to solve the problems existing in the prior art. The liner body is provided with mounting holes, which are arranged sequentially along the length of the liner body. The setting of multiple mounting holes can reduce the processing accuracy requirements of the cable liner, reduce the difficulty of installing the cable liner and the metal bracket, and improve the adaptability of the cable liner.

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1-6 As shown, this utility model provides a cable gasket, including a strip-shaped gasket body 1. The length of the gasket body 1 is more than five times its width, and can be ten times or more. The gasket body 1 has mounting holes 2 for mounting bolts. To fix the gasket body 1 to a metal bracket, the mounting holes 2 are stepped holes. Three or more mounting holes 2 are arranged sequentially along the length of the gasket body 1. The width of the different mounting holes 2 is consistent to allow for the installation of bolts of the same specification. The lengths can be the same or different. The mounting holes 2 are separated from each other by the material of the gasket body 1 itself. This separation acts as a reinforcing rib. Compared to having only one continuous mounting hole 2 along the length of the gasket body 1, this method improves the structural strength of the gasket body 1 and reduces the impact of deformation. The distance between the mounting holes 2 near the end face of the gasket body 1 and the end face is less than the length of a single mounting hole 2. In other words, the distance between the mounting holes 2 near the end face and the end face is insufficient to provide another mounting hole 2, so that the mounting holes 2 can be adequately arranged along the length of the gasket body 1. The distance between adjacent mounting holes 2 is also less than the length of a single mounting hole 2. In other words, the distance between adjacent mounting holes 2 is insufficient to provide another mounting hole 2, so that the mounting holes 2 can be adequately arranged along the length of the gasket body 1.

[0038] This invention provides three or more mounting holes 2 on the pad body 1. The mounting holes 2 are arranged sequentially along the length of the pad body 1. The distance between adjacent mounting holes 2 is less than the length of a single mounting hole 2. At the same time, the distance between the mounting hole 2 and the end face of the pad body 1 is less than the length of a single mounting hole 2. When installing bolts, suitable mounting holes 2 can be found on the pad body 1 and installed in a suitable position. This reduces the processing accuracy requirements of the cable pad, reduces the difficulty of installing the cable pad with the metal bracket, and improves the adaptability of the cable pad.

[0039] In one embodiment, the mounting hole 2 is strip-shaped, and its length direction is consistent with the length direction of the gasket body 1. This allows for the selection of a suitable bolt mounting position at a reasonable location along the length of the gasket body 1. The length of the mounting hole 2 is less than the width of the gasket body 1. By using a reasonable length for the mounting hole 2 and providing multiple mounting holes 2 on the gasket body 1, sufficient reinforcing ribs (spacers between adjacent mounting holes 2) can be provided, thereby ensuring the overall structural strength of the gasket body 1.

[0040] In this example, the length of the mounting hole 2 is greater than the width of the pad body 1. It should be noted that since the mounting hole 2 is a stepped hole with different hole settings, the length and width of the mounting hole 2 mentioned in this utility model refer to the length and width of the largest hole of the mounting hole 2.

[0041] In one embodiment, the mounting hole 2 is located in the middle of the width direction of the pad body 1. That is, after the pad body 1 is installed on the metal bracket, both sides of the pad body 1 in the width direction can form a sufficient support surface for supporting the cable. At the same time, the stability of the pad body 1 after installation can be guaranteed.

[0042] In one embodiment, the mounting hole 2 includes a first hole 21, a second hole 22, and a third hole 23 sequentially arranged in the thickness direction of the gasket body 1. The length and width of the first hole 21 are both greater than those of the second hole 22, and the length and width of the third hole 23 are both greater than those of the second hole 22. The first hole 21 is used to accommodate the head of the bolt, the second hole 22 is used to pass through the tail of the bolt, and the third hole 23 is used to reduce weight and material usage. At the same time, it can increase the notch area of ​​the mounting surface of the gasket body 1, reducing the precision machining requirements of the mounting surface of the gasket body 1.

[0043] In one embodiment, the width of the first hole 21 is the same as the width of the third hole 23, and the length of the first hole 21 is the same as the length of the third hole 23. That is to say, the dimensional parameters of the first hole 21 are basically consistent with those of the third hole 23, except for the depth. The overall structure is more regular and it is also convenient to set blind holes on both sides, reducing the requirements for injection mold design (the cable gasket of this utility model is manufactured by injection molding process, which requires the design of corresponding injection molds. However, a reasonable cable gasket structure design can reduce the design requirements for injection molds).

[0044] In one embodiment, the depth of the first hole 21 is greater than the depth of the third hole 23, and the depth of the third hole 23 is greater than the depth of the second hole 22. After the bolt is installed, the head of the bolt should ideally remain inside the first hole 21 without protruding outwards, so the first hole 21 should have sufficient depth. The side of the second hole 22 is used to support the head of the bolt so that sufficient preload can be provided to the bolt when it is installed, so the depth of the second hole 22 should not be too shallow. As for the third hole 23, a notch can be formed on the mounting surface of the gasket body 1, and the depth can be designed within a reasonable range to meet the weight reduction requirements.

[0045] In one embodiment, the surface of the pad body 1 near the first hole 21 is the first surface 6, which is the surface that contacts and supports the cable. The edges of the first surface 6 are all provided with chamfers 5, which reduce or avoid damage to the cable. The surface of the pad body 1 near the third hole 23 is the second surface 7, which is the mounting surface that contacts the metal bracket. The edges of the second surface 7 are not provided with chamfers to ensure flat and stable installation.

[0046] In one embodiment, the second surface 7 is provided with blind holes, including first blind holes 3 located on both sides of the mounting hole 2 in the width direction and second blind holes 4 located between the mounting hole 2 in the length direction and the end face. The provision of first blind holes 3 and second blind holes 4 can further reduce the weight and material consumption of the liner body 1, reduce the manufacturing cost of the cable liner, and also reduce the precision machining requirements of the second surface 7 (i.e., the mounting surface).

[0047] In one embodiment, the first blind hole 3 is provided corresponding to the mounting hole 2 in the length direction of the pad body 1. That is, a first blind hole 3 is provided on each side of the mounting hole 2 in the width direction. The length of the first blind hole 3 is equal to the length of the third hole 23, and the width of the first blind hole 3 is less than the width of the third hole 23. The first blind hole 3 and the third hole 23 are distributed in the width direction of the second surface 7, which not only provides a certain gap between the adjacent first blind hole 3 and the third hole 23 as a reinforcing rib, but also reasonably reduces the weight of the pad body 1, and provides a notch in the second surface 7 (reducing the processing accuracy requirements of the second surface 7).

[0048] In one embodiment, the second blind hole 4 is respectively provided in the width direction of the pad body 1, corresponding to the first blind hole 3 and the mounting hole 2. That is, the second blind hole 4 is provided between the first blind hole 3 and the end face of the pad body 1, and another second blind hole 4 is provided between the mounting hole 2 and the end face of the pad body 1. The width of the second blind hole 4 corresponding to the first blind hole 3 is the same as that of the first blind hole 3, and the width of the second blind hole 4 corresponding to the mounting hole 2 is the same as that of the third hole 23. Thus, the first blind hole 3, the second blind hole 4, and the third hole 23 (mounting hole 2) provided on the pad body 1 are arranged in an orderly and standardized manner, which is convenient for design and manufacturing.

[0049] The materials used to manufacture cable liners must meet requirements such as high insulation, high voltage resistance, weather resistance, and antistatic properties (conductivity or static dissipation). Commonly used materials include: silicone rubber as the matrix, with antistatic treatment achieved by adding conductive fillers (such as carbon black, carbon fiber, and metal oxides); ethylene propylene rubber as the matrix, with antistatic modification achieved by adding conductive particles or antistatic agents; and polyurethane as the matrix, with antistatic properties achieved through composite conductive materials.

[0050] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cable grommet, characterized by, The device includes a long strip-shaped pad body with mounting holes arranged in three or more sequentially along the length of the pad body. The distance between the mounting holes near the end face of the pad body and the end face is less than the length of a single mounting hole, and the distance between adjacent mounting holes is less than the length of a single mounting hole.

2. The cable gasket according to claim 1, characterized in that: The mounting hole is strip-shaped, and its length direction is consistent with the length direction of the pad body. The length of the mounting hole is less than the width of the pad body.

3. The cable gasket according to claim 1, characterized in that: The mounting hole is located in the middle of the width direction of the gasket body.

4. The cable gasket according to any one of claims 1-3, characterized in that: The mounting holes include a first hole, a second hole, and a third hole arranged sequentially in the thickness direction of the pad body. The length and width of the first hole are both greater than those of the second hole, and the length and width of the third hole are both greater than those of the second hole.

5. The cable gasket according to claim 4, characterized in that: The width of the first hole is the same as the width of the third hole, and the length of the first hole is the same as the length of the third hole.

6. The cable gasket according to claim 4, characterized in that: The depth of the first hole is greater than the depth of the third hole, and the depth of the third hole is greater than the depth of the second hole.

7. The cable gasket according to claim 4, characterized in that: The surface of the pad body near the first hole is the first surface, and the edges of the first surface are all chamfered. The surface of the pad body near the third hole is the second surface, and the edges of the second surface are not chamfered.

8. The cable gasket according to claim 7, characterized in that: The second surface is provided with blind holes, including first blind holes located on both sides of the width direction of the mounting hole and second blind holes located between the length direction of the mounting hole and the end face.

9. The cable gasket according to claim 8, characterized in that: The first blind hole is provided corresponding to the mounting hole in the length direction of the gasket body. The length of the first blind hole is equal to the length of the third hole, and the width of the first blind hole is less than the width of the third hole.

10. The cable gasket according to claim 8, characterized in that: The second blind hole is provided in the width direction of the gasket body, corresponding to the first blind hole and the mounting hole respectively. The width of the second blind hole corresponding to the first blind hole is the same as that of the first blind hole, and the width of the second blind hole corresponding to the mounting hole is the same as that of the third hole.

Images