Composite post insulator

Abstract

This invention discloses a composite post insulator, comprising an insulator body, a gasket covering the top surface of a support structure, and a cable fixing component for securing a cable above the gasket. The cable fixing component includes a first fixing part for mutual fixation with the support structure and a second fixing part for limiting and fixing the cable to the support structure. The gasket includes a bent part that fits into a support groove and flat parts at both ends of the bent part. Fixing holes for bolt fixing are provided at corresponding positions on the fixing lugs, flat parts, and support structure. Both the cable fixing component and the gasket are made of insulating material. This invention reduces the probability of cable damage while ensuring the stability of cable fixing, avoiding the problem of metal parts being damaged by electric fields or lightning strikes, thus providing highly stable cable fixing, significantly extending the service life of the cable and the cable fixing component, and improving economic efficiency.

Description

Technical Field

[0001] This invention relates to a cable fixing structure, specifically to a composite post insulator. Background Technology

[0002] Insulators are special insulating components that play a crucial role in overhead transmission lines. Their primary functions are electrical insulation and mechanical fixation. Post-type insulators support cables through an insulator support structure with arc-shaped support grooves for cable support. Because the insulator support structure is made of high-hardness materials such as metal, the localized pressure on the cable during tightening can easily damage it, especially in severe weather conditions such as strong winds, where the cable is subjected to external tension, making it more susceptible to damage. Furthermore, using metal components to fix the cable can easily create a loop at the fixing point due to the electric field, leading to increased cable temperature and reduced lifespan. In addition, during lightning strikes, if lightning hits the metal components, the surface of the metal can melt, partially burn, and ionize, generating instantaneous high temperatures and pressures, causing damage to both the metal components and the cable. Summary of the Invention

[0003] This invention addresses the above-mentioned problems by researching and designing a composite post insulator. The technical means employed in this invention are as follows: A composite post insulator includes an insulator body with a support structure at its upper end. The top surface of the support structure has a support groove for supporting cables. A gasket covering the top surface of the support structure is fitted onto the top surface of the support structure. Above the gasket is a cable fixing component for fixing the cable. The cable fixing component includes a first fixing part for fixing to the support structure and a second fixing part for limiting and fixing the cable to the support structure. The inner side of the second fixing part can form a limiting space for limiting the cable. The first fixing part is a fixing lug disposed on the second fixing part. The gasket includes a bent part that fits into the support groove and flat parts at both ends of the bent part. In the fixed state, the flat parts are located between the fixing lugs and the support structure. Fixing holes for bolt fixing are provided at corresponding positions of the fixing lugs, flat parts, and the support structure. Both the cable fixing component and the gasket are made of insulating material.

[0004] Furthermore, the second fixing part is an arc-shaped plate structure, and one fixing ear of the cable fixing member is fixed on the gasket. The specific fixing method can be that the cable fixing member and the gasket are set as an integral structure, glued, or connected by a connector.

[0005] Furthermore, the cable fastener and the gasket are an integral structure made of rubber, and one edge of the fixing lug of the cable fastener is connected to the end of the gasket via a connecting strip.

[0006] Furthermore, both the cable fastener and the gasket are made of rubber, and the edge of one of the fixing ears of the cable fastener is bonded to the end of the gasket.

[0007] Furthermore, both the cable fastener and the gasket are made of rubber, and the edge of one fixing lug of the cable fastener and the end of the gasket are both bonded to the same rubber strip.

[0008] Furthermore, the curved portion is provided with at least two support blocks that can abut against the cable.

[0009] Furthermore, each end of the curved portion is provided with at least one gasket fixing block. In the fixed state, the gasket fixing block can enter the gap between the cable fixing component and both sides of the cable and abut against the cable.

[0010] Furthermore, the second fixing part or fixing pad is provided with at least two first fixing blocks that can abut against the cable.

[0011] Furthermore, each end of the second fixing part is provided with at least one second fixing block. In the fixed state, the second fixing block can enter the gap between the two sides of the cable and the pad.

[0012] Furthermore, the main body of the cable fastener is made of rubber, the cable fastener has an internal reinforcing layer, and each fastening lug of the cable fastener has two or more fastening holes.

[0013] Compared with existing technologies, the composite post insulator of this invention reduces the probability of cable damage while ensuring the stability of cable fixation. The cable fixing parts and gaskets are all made of insulating materials, avoiding the problem of metal parts being damaged by electric fields or lightning. It provides high-stability fixation for the cable, significantly extends the service life of the cable and cable fixing parts, and improves economic efficiency. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0015] Figure 2 yes Figure 1 Top view.

[0016] Figure 3 This is a structural schematic diagram of the cable fixing component described in Embodiment 1 of this utility model.

[0017] Figure 4 yes Figure 3 Top view.

[0018] Figure 5This is a schematic diagram of the gasket structure described in Embodiment 1 of this utility model.

[0019] Figure 6 yes Figure 5 Top view.

[0020] Figure 7 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0021] Figure 8 yes Figure 7 Top view.

[0022] Figure 9 This is a schematic diagram of the integrated cable fixing component and gasket as described in Embodiment 2 of this utility model.

[0023] Figure 10 yes Figure 9 Top view.

[0024] Figure 11 This is a schematic diagram of the structure of Embodiment 2 of this utility model in the state where the cable is not fixed.

[0025] Figure 12 This is another structural schematic diagram of Embodiment 2 of this utility model (the connecting strip is U-shaped).

[0026] Figure 13 yes Figure 12 A schematic diagram showing the cable fastener in the raised position.

[0027] Figure 14 This is a structural schematic diagram of Embodiment 3 of the present invention (the umbrella skirt is not shown).

[0028] Figure 15 This is a structural schematic diagram of Embodiment 4 of the present invention (the umbrella skirt is not shown).

[0029] Figure 16 This is a structural schematic diagram of the cable fixing component described in Embodiment 5 of this utility model.

[0030] Figure 17 yes Figure 16 A bottom view.

[0031] Figure 18 This is a structural schematic diagram of Embodiment 5 of this utility model.

[0032] Figure 19 This is a structural schematic diagram of the integrated cable fixing component and gasket described in Embodiment Six of this utility model.

[0033] Figure 20 yes Figure 19 Top view.

[0034] Figure 21This is a structural schematic diagram of Embodiment Six of this utility model.

[0035] Figure 22 This is a structural schematic diagram of the integrated cable fixing component and gasket described in Embodiment 7 of this utility model.

[0036] Figure 23 yes Figure 22 Top view.

[0037] Figure 24 This is a structural schematic diagram of Embodiment Seven of this utility model.

[0038] Figure 25 This is a cross-sectional structural diagram of the integrated cable fixing component and gasket as described in Embodiment 8 of this utility model. Detailed Implementation

[0039] Example 1 like Figures 1 to 6As shown, a composite post insulator includes an insulator body 1. A support structure 11 is provided at the upper end of the insulator body 1. A support groove 12 for supporting a cable 4 is provided on the top surface of the support structure 11. A gasket 2 covering the top surface of the support structure 11 is attached to the top surface of the support structure 11. A cable fixing member 3 for fixing the cable 4 is also provided above the gasket 2. The cable fixing member 3 includes a first fixing part 31 for fixing to the support structure 11 and a second fixing part 32 for limiting and fixing the cable 4 to the support structure 11. A limiting space 33 for limiting the cable is formed inside the second fixing part 32. The first fixing part 31 is a fixing lug provided on the second fixing part 32. In this embodiment, the second fixing part 32 is an arc-shaped plate structure. The gasket 2 includes a curved portion 21 that fits into the support groove and flat portions 22 at both ends of the curved portion 21. In the fixed state, the flat portions 22 are located between the fixing ear and the support structure 11. Fixing holes for bolt 5 fixing are provided at corresponding positions of the fixing ear, the flat portions 22, and the support structure 11. Both the cable fixing member 3 and the gasket 2 are made of insulating material. In this embodiment, both the cable fixing member 3 and the gasket 2 are made of rubber. The gasket 2 can be fixed to the support structure 11 by adhesive bonding or can be formed directly on the support structure 11 by rubber coating. When adhesive bonding, the flat sheet of rubber can be naturally bonded to the support structure 11 to form the curved portion 21 and the flat portion 22, or the gasket 2 can be directly shaped to fit the support structure 11 and then glued for fixing. In this embodiment, a gasket covering the entire top surface of the support structure is provided and further fixed by bolts, preventing the gasket from loosening or even falling off after long-term use, while providing cushioning for the fixing ear and extending its service life. Each fixing lug of the cable fixing component 3 has two or more fixing holes. The cable fixing component 3 is fixed to the support structure 11 by four bolts 5, which improves the fixing strength. The center distance between the two fixing holes at each fixing lug is preferably not less than 20 mm. The composite post insulator described in this embodiment reduces the probability of cable damage while ensuring the stability of cable fixing. The cable fixing component and the gasket are both made of insulating rubber to prevent the high-hardness metal structure 11 from damaging the cable. It avoids the problem of metal components damaging themselves or the cable under the action of electric field or lightning, and provides high-stability fixing of the cable, which greatly extends the service life of the cable and the cable fixing component itself and improves economic efficiency.

[0040] Example 2 like Figures 7 to 10As shown, the difference between this embodiment and Embodiment 1 is that the cable fixing member 3 and the gasket 2 are an integral structure made of rubber. One fixing lug edge of the cable fixing member 3 is connected to the end of the gasket 2 via a connecting strip 6. The gasket 2 is bonded to the support structure 11. In this embodiment, the cable fixing member 3 and the gasket 2 are an integral sheet structure made of rubber. The thickness of the cable fixing member 3 and the gasket 2 can be the same or different. In the unfixed state of the cable 4, the cable fixing member 3 is suspended from one end of the gasket 2 via the connecting strip 6. When fixing the cable 4, it is only necessary to fold the cable fixing member 3 upwards, as shown. Figure 11 As shown, the cable 3 is fixed in the support groove 12 by bolts 5. The cable fixing component 3 and the gasket 2 are set as an integral structure. The gasket 2 is fixed to the support structure 11, which also realizes the pre-fixation of the cable fixing component 3. During construction, there is no need to carry the cable fixing component 3 separately, and it can prevent the cable fixing component 3 from falling when working at height, which facilitates the installation operation.

[0041] In this embodiment, the connecting strip 6 can be a straight strip in its natural state, or it can be... Figure 12 The U-shaped strip structure shown can be installed by lifting cable fixing piece 3. Figure 13 As shown.

[0042] The other structures, applicable scenarios, and corresponding beneficial effects of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0043] Example 3 like Figure 14 As shown, the difference between this embodiment and Embodiment 2 is that both the cable fixing component 3 and the gasket 2 are made of rubber, and the edge of one fixing lug of the cable fixing component 3 is bonded to the end of the gasket 2. This embodiment also eliminates the need to carry the cable fixing component separately during construction and prevents it from falling during high-altitude operations, facilitating installation. Other structures, applicable scenarios, and corresponding beneficial effects of this embodiment are the same as in Embodiment 2, and will not be repeated here.

[0044] Example 4 like Figure 15 As shown, the difference between this embodiment and Embodiment 2 is that both the cable fastener 3 and the gasket 2 are made of rubber. The edge of one fixing lug of the cable fastener 3 and the end of the gasket 2 are both bonded to the same rubber strip 7. In other words, the cable fastener 3 and the gasket 2 are indirectly bonded by being bonded together to the same connection structure. This embodiment also eliminates the need to carry the cable fastener separately during construction and prevents it from falling during high-altitude operations, facilitating installation. Other structures, applicable scenarios, and corresponding beneficial effects of this embodiment are the same as in Embodiment 2, and will not be repeated here.

[0045] Example 5 like Figures 16 to 18 As shown, the difference between this embodiment and Embodiment 1 is that at least two first fixing blocks 34 that can abut against the cable are provided on the inner side of the second fixing part 32. The inner side of the second fixing part 32 refers to the side facing the cable 4. In the fixed state, the first fixing blocks 34 can abut against both sides of the cable 4. The arrangement of the first fixing blocks 34 makes the second fixing part 32 and the cable 4 form an interference fit, making the cable 4 more stable under the fixation of the cable fixing member 3. In this embodiment, two first fixing blocks 34 are provided on each side of the cable 4, that is, at both ends of the second fixing part 32, forming four abutments with the cable 4, improving stability. The shape of the first fixing blocks 34 can be, but is not limited to, prism, pyramid, or frustum shape, as long as it can form sufficient abutment with the cable. The number of first fixing blocks 34 can be set as needed, and one, two or more can be set on each side. Other structures, applicable scenarios and corresponding beneficial effects of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0046] Example 6 like Figures 19 to 21 As shown, the difference between this embodiment and Embodiment 2 is that at least two first fixing blocks 34 that can abut against the cable 4 are provided on the inner side of the second fixing part 32. The inner side of the second fixing part 32 refers to the side facing the cable 4. In the fixed state, the first fixing blocks 34 can abut against both sides of the cable 4. The arrangement of the first fixing blocks 34 makes the second fixing part 32 and the cable 4 form an interference fit, making the cable 4 more stable under the fixation of the cable fixing member 3. In this embodiment, two first fixing blocks 34 are provided on each side of the cable 4, that is, at both ends of the second fixing part 32, forming four abutments with the cable 4 to improve stability. The shape of the first fixing blocks 34 can be, but is not limited to, prism, pyramid, or frustum shape, as long as it can form a sufficient abutment with the cable 4. The number of first fixing blocks 34 can be set as needed, and one, two or more can be set on each side.

[0047] At least one second fixing block 35 is provided at each end of the second fixing part 32. In the fixed state, the second fixing block 35 can enter the gap between the two sides of the cable 4 and the insulator support structure 11. The two ends of the second fixing part 2 correspond to the two sides of the cable. The second fixing block 23 can be provided on the inner side of the cable fixing member or on the first fixing block 22. In this embodiment, the second fixing block 23 is provided on the first fixing block 22, forming a block structure that combines the functions of the first fixing block 22 and the second fixing block 23. The second fixing block 23 is in point contact, line contact, or surface contact with the cable 4, preferably line contact or surface contact. The provision of the first fixing block 22 makes the second fixing part 2 and the cable 4 form an interference fit, making the cable more stable under the fixation of the cable fixing member. The provision of the second fixing block 23 makes the support groove 31 of the insulator support structure 3 laterally limit the cable through the second fixing block 23, making the relative position between the cable 4 and the insulator support structure 3 more stable, preventing the cable from swaying laterally, and further improving the stability of the cable. The second fixing block can be prismatic, meaning the contact surfaces between the second fixing block and the cable and the insulator support structure are both flat. Alternatively, depending on the needs, the contact surface between the second fixing block and the cable can be shaped to fit snugly against the cable, and the contact surface between the fixing block and the insulator support structure can be shaped to fit snugly against the insulator support structure. In other words, both contact surfaces of the second fixing block can be set to corresponding arc shapes. The number of second fixing blocks can be set as needed; one or two can be set on each side, or a single elongated second fixing block can be used throughout the entire block.

[0048] The other structures, applicable scenarios, and corresponding beneficial effects of this embodiment are the same as those of Embodiment 2, and will not be repeated here. Based on all embodiments of the present invention, a first fixing block and a second fixing block can be provided as needed; whether or not they are provided, they are all within the protection scope claimed by the present invention.

[0049] Example 7 like Figures 22 to 24As shown, the difference between this embodiment and Embodiment 2 is that at least one gasket fixing block 23 is provided at each end of the bent portion 21. In the fixed state, the gasket fixing block 23 can abut against the cable 4 and its end can enter the gap between the cable fixing member 3 and both sides of the cable 4. The setting of the gasket fixing block 23 makes the gasket 2 and the cable 4 form an interference fit, making the cable 4 more stable. At the same time, the support groove 12 of the support structure 11 is laterally limited by the gasket fixing block 23, and the gasket fixing block 23 abuts against both the cable 4 and the cable fixing member 3, making the relative position between the cable 4 and the support structure 11 more stable, preventing the cable 4 from swaying laterally, and further improving the stability of the cable 4. The shape of the gasket fixing block 23 can be prismatic, that is, the contact surface between the gasket fixing block 23 and the cable 4 and the cable fixing member 3 is set as a plane, or the contact surface can be set as an arc shape or other shapes as needed. Other structures, applicable scenarios and corresponding beneficial effects of this embodiment are the same as those of Embodiment 2, and will not be repeated here.

[0050] Example 8 like Figure 25 As shown, the difference between this embodiment and Embodiment Seven is that the cable fixing component 3 has an internal reinforcing layer 36. The hardness of the reinforcing layer 36 is greater than that of the rubber cable fixing component 3 body, which strengthens the cable fixing component 3. On the one hand, it reduces the flexibility of the cable fixing component 3 and enhances the stability of the cable 4; on the other hand, it increases the strength at the fixing ear, preventing damage to the fixing ear under the tightening pressure of the bolt 5. The material of the reinforcing layer 36 is preferably nylon. The thickness of the portion of the reinforcing layer 36 located in the first fixing part 31 and the portion located in the second fixing part 32 can be set to be the same or different. Preferably, the thickness of the portion of the reinforcing layer 36 located in the first fixing part 31 is greater than that located in the second fixing part 32. This retains some flexibility of the second fixing part 32, facilitating cable installation, while increasing the thickness of the reinforcing layer at the fixing ear to ensure installation strength and extend service life. Other structures, applicable scenarios, and corresponding beneficial effects of this embodiment are the same as those of Embodiment Seven, and will not be repeated here.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A composite post insulator, comprising an insulator body, wherein a support structure is provided at the upper end of the insulator body, and a support groove for supporting cables is provided on the top surface of the support structure, characterized in that: A gasket covering the top surface of the support structure is attached to the top surface of the support structure. Above the gasket, a cable fixing component for fixing the cable is also provided. The cable fixing component includes a first fixing part for fixing to the support structure and a second fixing part for limiting and fixing the cable to the support structure. The inner side of the second fixing part can form a limiting space for limiting the cable. The first fixing part is a fixing ear provided on the second fixing part. The gasket includes a curved part that fits into the support groove and flat parts at both ends of the curved part. In the fixed state, the flat parts are located between the fixing ears and the support structure. Fixing holes for bolt fixing are provided at corresponding positions of the fixing ears, flat parts and the support structure. The cable fixing component and the gasket are both made of insulating material.

2. The composite post insulator according to claim 1, characterized in that: The second fixing part is an arc-shaped plate structure, and one fixing lug of the cable fixing member is fixed on the gasket.

3. The composite post insulator according to claim 2, characterized in that: The cable fastener and the gasket are an integral structure made of rubber, and one edge of the fixing lug of the cable fastener is connected to the end of the gasket through a connecting strip.

4. The composite post insulator according to claim 2, characterized in that: Both the cable fastener and the gasket are made of rubber, and the edge of one of the fixing ears of the cable fastener is bonded to the end of the gasket.

5. The composite post insulator according to claim 2, characterized in that: Both the cable fastener and the gasket are made of rubber, and the edge of one fixing lug of the cable fastener and the end of the gasket are both bonded to the same rubber strip.

6. The composite post insulator according to any one of claims 1 to 5, characterized in that: The curved section is provided with at least two support blocks that can abut against the cable.

7. The composite post insulator according to claim 6, characterized in that: At least one gasket fixing block is provided at each end of the bending section. In the fixed state, the gasket fixing block can enter the gap between the cable fixing component and both sides of the cable and abut against the cable.

8. The composite post insulator according to any one of claims 1 to 5, characterized in that: The second fixing part or fixing pad is provided with at least two first fixing blocks that can abut against the cable.

9. The composite post insulator according to claim 8, characterized in that: At least one second fixing block is provided at each end of the second fixing part. In the fixed state, the second fixing block can enter the gap between the two sides of the cable and the pad.

10. The composite post insulator according to claim 1, characterized in that: The main body of the cable fastener is made of rubber, and the inside of the cable fastener is provided with a reinforcing layer. Each fastening lug of the cable fastener is provided with two or more fastening holes.

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