Cable fixing structure

Abstract

The utility model discloses a cable fixing structure which comprises an upper clamping strip used for surrounding a cable and a lower clamping strip used for surrounding an insulator and fixing the upper clamping strip on the insulator, and the upper clamping strip comprises an upper clamping strip body provided with a first containing groove and an upper clamping strip covering layer capable of covering the first containing groove. A first reinforcing layer is arranged in the first containing groove, the upper clamping strip body and the upper clamping strip covering layer are made of rubber materials, and the first reinforcing layer is of a reinforcing fiber structure or an insulating layer structure with the hardness larger than that of the upper clamping strip body and the upper clamping strip covering layer. According to the cable fixing structure, the upper clamping strip is arranged to be of a split assembly structure, the problem that the positioning difficulty of the reinforcing layer is high in the rubber integrated forming process is solved, the complex positioning process in the forming process is avoided in the mode that the groove is formed, then the reinforcing layer is installed, and then the covering layer is fixed, and therefore the cable fixing structure is simple in structure and convenient to use. And on the premise of ensuring that the position of the reinforcing layer reaches the standard, the production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of cable or wire installation technology, and more specifically to a cable fixing structure. Background Technology

[0002] During the construction of high-voltage cables, when fixing the cables with insulators, metal winding or metal clamps are commonly used. Using metal winding requires experienced personnel, increasing the difficulty of construction, and this method has poor wind resistance. Clamping the cable with metal clamps, due to the electric field, can easily create a loop at the clamping point, causing the cable to overheat and reducing its lifespan.

[0003] To address the aforementioned issues, rubber cable clamps have been introduced into use. To enhance the strength of the rubber cable clamping structure, a reinforcing structure is typically added inside the rubber. Due to the unique structure of the cable clamping structure, ensuring that the reinforcing structure is fully covered by rubber and that the thickness of the covering layer is relatively uniform requires a significant amount of time to position the reinforcing structure during the manufacturing process, which greatly reduces production efficiency. Summary of the Invention

[0004] This invention addresses the above-mentioned problems by researching and designing a cable fixing structure. The technical means employed in this invention are as follows:

[0005] A cable fixing structure includes an upper clamping bar for wrapping around a cable and a lower clamping bar for wrapping around an insulator and fixing the upper clamping bar to the insulator. The upper clamping bar includes an upper clamping bar body with a first receiving groove and an upper clamping bar covering layer that can cover the first receiving groove. A first reinforcing layer is provided in the first receiving groove. The upper clamping bar body and the upper clamping bar covering layer are made of rubber. The first reinforcing layer is a reinforcing fiber or an insulating layer structure with a hardness greater than that of the upper clamping bar body and the upper clamping bar covering layer.

[0006] Furthermore, the cable fixing structure includes two upper clamping strips and two lower clamping strips, which are spaced apart and directly or indirectly fixedly connected end to end. The connection between the upper and lower clamping strips is also provided with a fixing part for fixing the cable fixing structure. The fixing part is a fixing hole for fixing with bolts. The upper clamping strip has an inverted U-shaped structure. The first receiving groove is provided on the inner side of the upper clamping strip body. The upper clamping strip covering layer is also provided on the inner side of the upper clamping strip body. The fixing hole passes through the first reinforcing layer.

[0007] Furthermore, the first reinforcing layer is bonded and fixed within the first receiving groove, and the upper clip cover layer is bonded and fixed to the first reinforcing layer and the upper clip body.

[0008] Furthermore, the lower clamping strip is provided with a second reinforcing layer. The lower clamping strip includes a lower clamping strip body with a second receiving groove and a lower clamping strip covering layer that can cover the second receiving groove. The first reinforcing layer is made of nylon, and the second reinforcing layer is made of metal. The fixing hole passes through the second reinforcing layer.

[0009] Furthermore, the thickness of the middle part of the first reinforcing layer is less than the thickness of its two ends, the upper clip cover layer is a rubber layer structure coated or bonded to the upper clip body and the first reinforcing layer, and the lower clip cover layer is a rubber layer structure coated or bonded to the lower clip body and the second reinforcing layer.

[0010] Furthermore, the cable fixing structure also includes a support part that can provide outward support for the upper clamping bar in the radial direction of the insulator, and a fixing block that can stabilize the cable in a fixed state is provided on the upper clamping bar or at the connection between the upper clamping bar and the lower clamping bar.

[0011] Furthermore, the support portion is disposed on the inner or outer side of the lower clamping bar, and the inner or outer side of the support portion is arc-shaped and can contact the insulator or the lower clamping bar.

[0012] Furthermore, the support portion and the upper clamping strip are interconnected to form an upper clamping strip assembly, which is fixed to the outside of the lower clamping strip.

[0013] Furthermore, the upper and lower clamping strips are fixed together to form a fixed structure body, and the support part is located on the inner or outer side of the fixed structure body.

[0014] Furthermore, the fixing block is a conical or pyramidal block, and the tip of the fixing block points towards the center side of the structure enclosed by the lower clamping strip.

[0015] Compared with the prior art, the cable fixing structure of the present invention avoids the problem of high positioning difficulty in the integral molding of the reinforcing layer by setting the upper clamping strip as a separate assembly structure. By setting the groove, inserting the reinforcing layer, and then fixing the cover layer, the complex positioning process during molding is avoided. Under the premise of ensuring that the position of the reinforcing layer meets the standard, the production efficiency is greatly improved. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0017] Figure 2 This is a front view schematic diagram of Embodiment 1 of this utility model.

[0018] Figure 3 yes Figure 2 The left view.

[0019] Figure 4 yes Figure 2 Top view.

[0020] Figure 5 yes Figure 2 A bottom view.

[0021] Figure 6 This is a three-dimensional structural diagram of the upper clamping strip assembly described in Embodiment 1 of this utility model.

[0022] Figure 7 This is a front view schematic diagram of the upper clamping strip assembly described in Embodiment 1 of this utility model.

[0023] Figure 8 yes Figure 7 The right view.

[0024] Figure 9 yes Figure 8 Top view.

[0025] Figure 10 yes Figure 8 AA cross-section view.

[0026] Figure 11 This is a cross-sectional schematic diagram of the upper clamping strip body as described in Embodiment 1 of this utility model.

[0027] Figure 12 This is a schematic diagram of the structure of the lower clamping strip as described in Embodiment 1 of this utility model.

[0028] Figure 13 yes Figure 12 BB cross-section.

[0029] Figure 14 This is a schematic diagram of the structure of the lower clamping strip body as described in Embodiment 1 of this utility model.

[0030] Figure 15 yes Figure 14 CC cross-section view.

[0031] Figure 16 This is a schematic diagram of the implementation state of Embodiment 1 of this utility model.

[0032] Figure 17 This is a three-dimensional structural diagram of Embodiment 2 of this utility model.

[0033] Figure 18 This is a front view schematic diagram of Embodiment 3 of this utility model.

[0034] Figure 19 yes Figure 18 The left view.

[0035] Figure 20 yes Figure 18 Top view.

[0036] Figure 21 yes Figure 18 A bottom view.

[0037] Figure 22 This is a schematic diagram of the implementation state of Embodiment 3 of this utility model.

[0038] Figure 23 This is a three-dimensional structural diagram of Embodiment 4 of this utility model.

[0039] Figure 24 This is a schematic diagram of the support portion described in Embodiment 4 of this utility model.

[0040] Figure 25 This is a three-dimensional structural diagram of Embodiment 5 of this utility model.

[0041] Figure 26 This is a front view schematic diagram of Embodiment 5 of this utility model.

[0042] Figure 27 yes Figure 26 The left view.

[0043] Figure 28 yes Figure 26 Top view.

[0044] Figure 29 yes Figure 26 DD cross-sectional view.

[0045] Figure 30 This is a cross-sectional schematic diagram of the upper clamping strip body as described in Embodiment 5 of this utility model.

[0046] Figure 31 yes Figure 28 EE cross-section.

[0047] Figure 32 This is a cross-sectional schematic diagram of the lower clamping strip body as described in Embodiment 5 of this utility model.

[0048] Figure 33 This is a schematic diagram of the implementation state of Embodiment 5 of this utility model. Detailed Implementation

[0049] Example 1

[0050] like Figures 1 to 9 As shown, a cable fixing structure includes an upper clamping bar 1 for wrapping around a cable and a lower clamping bar 2 for wrapping around an insulator 5 and fixing the upper clamping bar 1 to the insulator. It also includes a support part 3 that can provide outward support for the upper clamping bar 1 in the radial direction of the insulator. The upper clamping bar 1 is made of insulating material, preferably rubber.

[0051] As a preferred embodiment, this embodiment includes two upper clamping strips 1 and two lower clamping strips 2, which are spaced apart and directly or indirectly fixedly connected end to end. The support part 3 is provided at the connection between the upper clamping strips 1 and the lower clamping strips 2, and the connection between the upper clamping strips 1 and the lower clamping strips 2 is also provided with a fixing part 4 for fixing the cable fixing structure. In this embodiment, the fixing part 4 is a fixing hole for fixing with bolts. The upper clamping strip 1 has an inverted U-shaped structure, and a fixing block 6 is provided on the upper clamping strip or at the connection between the upper and lower clamping strips to stabilize the cable in a fixed state.

[0052] In this embodiment, the support part 3 and the upper clamping strip 1 are interconnected to form an upper clamping strip assembly. The upper clamping strip assembly in this embodiment is a single piece, and it is fixed to the inner side of the lower clamping strip 2. The support part 3 can contact the insulator 5. As a preferred embodiment, the inner side of the support part 3 is a curved surface that mates with the neck of the insulator 5, and the outer side of the support structure is a curved surface that is bonded to the lower clamping strip 2, so that the support part 3 as a whole has a curved wedge-shaped structure.

[0053] The fixing block 6 is preferably a conical or pyramidal block, with its tip pointing towards the center of the structure formed by the lower clamping strip 2. In the fixed state, the tip of the fixing block 6 can enter the gap between the cable and the insulator support structure to fix the cable and prevent it from moving within the support groove of the insulator support structure. In this embodiment, the fixing block 6 is a pyramidal structure, positioned on the upper clamping strip, and its position corresponds to the position of the cable receiving groove on the insulator.

[0054] like Figure 16 As shown, in this embodiment, in the fixed state, the bolt passes through the fixing hole through the upper clamping strip 1 and the lower clamping strip 2 to fix the cable 7 fixing structure. The two lower clamping strips 2 form an approximately elliptical or spindle-shaped structure. The internal space formed by the lower clamping strip 2 and the inner support part 3 is approximately circular or a circle that matches the neck of the insulator, so that the lower clamping strip 2 and the support part 3 are in close contact with the neck of the insulator. The two inverted U-shaped upper clamping strips limit and fix the cable 7 in the fixing groove of the insulator. The fixing block 6 is inserted into the gap between the cable 7 and the fixing groove at the corresponding position, providing effective support for the cable 7 and preventing the cable 7 from shaking.

[0055] Existing cable insulation clamps suffer from insufficient fit with the insulator. Specifically, due to the small-diameter neck between the insulator's support structure and body, the support structure resembles a flange. Consequently, if the lower clamping bar of the existing clamp tightens around the insulator's neck, the upper clamping bar, obstructed by the protruding side support structure, will tilt and deform, failing to tightly wrap around and secure the cable. Conversely, if the upper clamping bar is to remain relatively vertical, the lower clamping bar cannot clamp the neck, resulting in a large gap and low stability. This embodiment effectively solves this problem by incorporating a support portion. This support portion allows the upper clamping bar to remain stably supported even as its position shifts radially outward, while the lower clamping bar directly or indirectly fits tightly against the neck, improving the fit between the cable fixing structure and the insulator and significantly enhancing stability.

[0056] like Figures 10 to 15 As shown, in this embodiment, the upper clamping strip 1 includes an upper clamping strip body 13 with a first receiving groove 12 and an upper clamping strip covering layer 14 that covers the first receiving groove 12. A first reinforcing layer 11 is provided within the first receiving groove 12. The upper clamping strip body 13 and the upper clamping strip covering layer 14 are made of rubber. The first reinforcing layer 11 is made of reinforcing fiber or an insulating layered structure with a hardness greater than that of the upper clamping strip body 13 and the upper clamping strip covering layer 14. Preferably, the first receiving groove 12 is located inside the inverted U-shaped upper clamping strip body 13, and the upper clamping strip covering layer 14 is also located inside the upper clamping strip body 13. The first reinforcing layer 11 is adhered and fixed within the first receiving groove 12, and the upper clamping strip covering layer 14 is adhered and fixed to the first reinforcing layer 11 and the upper clamping strip body 13. As a preferred embodiment, the lower clamping strip 2 is provided with a second reinforcing layer 21. The lower clamping strip 2 includes a lower clamping strip body 23 with a second receiving groove 22 and a lower clamping strip covering layer 24 that covers the second receiving groove 22. The lower clamping strip covering layer 24 is a rubber layered structure coated or bonded to the lower clamping strip body 23 and the second reinforcing layer 21. In this embodiment, the first reinforcing layer 11 is made of plastic, preferably nylon, and the second reinforcing layer 21 is made of metal. When the first reinforcing layer is reinforcing fiber, it can be rubber reinforcing fiber of various materials, especially nylon fiber. As a preferred embodiment, the thickness of the middle part of the first reinforcing layer 11 is less than the thickness of its two ends. The upper clamping strip covering layer 14 is a rubber layered structure coated or bonded to the upper clamping strip body and the first reinforcing layer. To increase the fixing strength, a through hole, serving as a fixing part, passes through the first reinforcing layer 11 and the second reinforcing layer 21.

[0057] In this embodiment, if the upper clamping strip 1 of the cable fixing structure needs to incorporate the first reinforcing layer 11, the upper clamping strip body 13 with the first receiving groove 12 needs to be pre-formed. Then, the first reinforcing layer 11 is placed in the first receiving groove 12 with matching dimensions and can be bonded and fixed. Afterward, the pre-formed upper clamping strip covering layer 14 is bonded to cover the first receiving groove 12 and simultaneously cover the first reinforcing layer 11, or rubber is coated around the first reinforcing layer 11 and the first receiving groove 12 to form the upper clamping strip covering layer 14. The structural configuration of this embodiment allows the upper clamping strip body 13 and the upper clamping strip covering layer 14 to be formed separately, avoiding the high-difficulty positioning of the first reinforcing layer 11 inside a one-time molding mold, thereby avoiding the problem of the first reinforcing layer 11 being tilted and exposed due to inaccurate positioning or the presence of holes in the rubber due to the positioning support structure. Similarly, when the lower clamping strip incorporates the second reinforcing layer 21, a lower clamping strip body 23 with a second receiving groove 22 is pre-formed, and then the second reinforcing layer is fixed in the size-matched second receiving groove 22. Afterwards, the lower clamping strip covering layer 24 is bonded or coated. In actual production, it has been proven that the structure of this embodiment can greatly improve production efficiency and the yield rate of finished products, while ensuring the mechanical properties of the product.

[0058] Example 2

[0059] like Figure 17 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment does not have a fixed block. The other structures and beneficial effects of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0060] Example 3

[0061] like Figures 18 to 22 As shown, in this embodiment, the upper clamping strip 1 and the support portion 3 are also an integral upper clamping strip assembly. The support portion 3 in this embodiment also has a curved wedge-shaped structure. The difference between this embodiment and Embodiment 1 is that the upper clamping strip assembly is fixed to the outside of the lower clamping strip 2, the inner side of the support portion is a curved surface that adheres and bonds to the lower clamping strip, and the inner side of the lower clamping strip 2 is a curved surface that can fully abut against the neck of the insulator. Other structures and beneficial effects of this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0062] Example 4

[0063] like Figure 23 Hezhi Figure 24As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the upper clamping strip 1 and the lower clamping strip 2 are fixed together to form the main body of the fixing structure. The upper clamping strip 1 and the lower clamping strip 2 can be made into a single structure, or bolts can pass through the upper clamping strip 1 and the lower clamping strip 2 for fixing, or they can be fixed by adhesive bonding. The support part 3 is located on the inner or outer side of the main body of the fixing structure. This embodiment uses the example of it being located on the inner side of the main body of the fixing structure for explanation. The support part 3 has a fixing end 31, and bolts pass through the main body of the fixing structure and the fixing end 31 of the support part 3 for fixing. The support part 3 is bonded to the inner side of the main body of the fixing structure. The support part 3 has a curved wedge-shaped structure, and the structure formed by the inner side of the support part 3 and the lower clamping strip 2 can fully abut against the neck of the insulator 5. Other structures and beneficial effects of this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0064] Example 5

[0065] like Figures 25 to 28 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment does not include a support portion. Specifically, the cable fixing structure of this embodiment includes two lower clamping strips 2 for surrounding and fixing to the insulator and two upper clamping strips 1 for surrounding and fixing the cable. The upper clamping strips 1 and lower clamping strips 2 are spaced apart and sequentially fixedly connected to form four connecting corners. At each connecting corner, a fixing portion 4 is provided to fix two adjacent connecting corners at both ends of the upper clamping strip 2 to each other. A fixing block 4 is provided at the connection point of the upper clamping strip 1 or the lower clamping strip 2 to stabilize the cable in a fixed state. Specifically, the lower clamping strip can be set as a semi-circular ring, a semi-elliptical ring, or an arc shape with a central angle less than 180 degrees. Both ends of the lower clamping strip 2 have through holes, which are the fixing portions 4 in this embodiment. The upper clamping strip 1 has an inverted U-shaped structure.

[0066] like Figures 29 to 32As shown, the upper clamping strip 1 includes an upper clamping strip body 13 with a first receiving groove 12 and an upper clamping strip covering layer 14 that covers the first receiving groove 12. A first reinforcing layer 11 is provided within the first receiving groove 12. The upper clamping strip body 13 and the upper clamping strip covering layer 14 are made of rubber. The first reinforcing layer 11 is made of reinforcing fiber or an insulating layered structure with a hardness greater than that of the upper clamping strip body 13 and the upper clamping strip covering layer 14. Preferably, the first receiving groove 12 is located inside the inverted U-shaped upper clamping strip body 13, and the upper clamping strip covering layer 14 is also located inside the upper clamping strip body 13. The first reinforcing layer 11 is adhered and fixed within the first receiving groove 12, and the upper clamping strip covering layer 14 is adhered and fixed to the first reinforcing layer 11 and the upper clamping strip body 13. Preferably, the lower clamping strip 2 has a second reinforcing layer 21. The lower clamping strip 2 includes a lower clamping strip body 23 with a second receiving groove 22 and a lower clamping strip covering layer 24 that covers the second receiving groove 22. In this embodiment, the first reinforcing layer 11 is made of plastic, preferably nylon, and the second reinforcing layer 21 is made of metal. When the first reinforcing layer 11 is a reinforcing fiber, it can be a rubber reinforcing fiber of various materials, especially nylon fiber. As a preferred embodiment, the thickness of the middle part of the first reinforcing layer 11 is less than the thickness of its two ends, and the upper clamping strip covering layer 14 is a rubber layered structure coated or bonded to the upper clamping strip body and the first reinforcing layer. Similar to the embodiment, the structural setting of this embodiment allows the upper clamping strip body 13 and the upper clamping strip covering layer 14 to be formed separately, avoiding the high difficulty of positioning the first reinforcing layer 11 inside the mold of one-time molding, thereby avoiding the problem of the first reinforcing layer 11 tilting and being exposed due to inaccurate positioning or the presence of holes in the rubber due to the positioning support structure. The lower clamping strip 2 is similarly designed, solving the same problem and achieving the same beneficial effect. In actual production, it has been proven that the structure of this embodiment can greatly improve production efficiency and the qualification rate of finished products, while ensuring the mechanical properties of the product. In this embodiment, the upper clamping strip body 13, the lower clamping strip body 23, and the fixing block 6 can be configured as an integral structure, or the upper clamping strip body 13 and the lower clamping strip body 23 can be configured separately and fixed during assembly. If configured as an integral structure, the first receiving groove 12 and the second receiving groove 22 intersect and connect at the connecting corner of the upper and lower clamping strips. During assembly, the second reinforcing layer 21 and the first reinforcing layer 11 can be placed sequentially, and then covered and sealed by the upper clamping strip covering layer 14 and the lower clamping strip covering layer 24. The upper clamping strip covering layer 14 and the lower clamping strip covering layer 24 can be configured as an integral structure or can be configured separately and fixed separately. To increase the fixing strength, the through hole of the fixing part passes through the first reinforcing layer 11 and the second reinforcing layer 21.

[0067] like Figure 33As shown, in this embodiment, in the fixed state, the two adjacent connecting corners at both ends of the upper clamping strip 1 are fixed to each other by bolts, and the two lower clamping strips 2 are wrapped around the top of the insulator 5. The cable 5 passes through the two upper clamping strips 2 and is confined in the fixing groove above the insulator 5. The fixing block 4 is inserted into the gap between the cable and the insulator at the corresponding position, providing effective support for the cable 7 and solving the problem of shaking.

[0068] 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 cable fixing structure comprising an upper clamp strip for encircling a cable and a lower clamp strip for encircling a post and fixing the upper clamp strip to the post, characterized in that: The upper clamping strip includes an upper clamping strip body with a first receiving groove and an upper clamping strip covering layer that can cover the first receiving groove. The first receiving groove is provided with a first reinforcing layer. The upper clamping strip body and the upper clamping strip covering layer are made of rubber. The first reinforcing layer is a reinforcing fiber or an insulating layered structure with a hardness greater than that of the upper clamping strip body and the upper clamping strip covering layer.

2. The cable securing structure according to claim 1, characterized by: It includes two upper clamping strips and two lower clamping strips, which are spaced apart and directly or indirectly fixedly connected end to end. The connection between the upper and lower clamping strips is also provided with a fixing part for fixing the cable fixing structure. The fixing part is a fixing hole for fixing with bolts. The upper clamping strip has an inverted U-shaped structure. The first receiving groove is provided on the inner side of the upper clamping strip body. The upper clamping strip covering layer is also provided on the inner side of the upper clamping strip body. The fixing hole passes through the first reinforcing layer.

3. The cable securing structure according to claim 2, characterized by: The first reinforcing layer is attached and fixed in the first receiving groove, and the upper clip cover layer is attached and fixed on the first reinforcing layer and the upper clip body.

4. The cable securing structure according to claim 3, characterized by: The lower clamping strip has a second reinforcing layer inside. The lower clamping strip includes a lower clamping strip body with a second receiving groove and a lower clamping strip covering layer that can cover the second receiving groove. The first reinforcing layer is made of nylon, and the second reinforcing layer is made of metal. The fixing hole passes through the second reinforcing layer.

5. The cable securing structure according to claim 4, characterized by: The thickness of the middle part of the first reinforcing layer is less than the thickness of its two ends. The upper clip cover layer is a rubber layer structure coated or bonded to the upper clip body and the first reinforcing layer. The lower clip cover layer is a rubber layer structure coated or bonded to the lower clip body and the second reinforcing layer.

6. The cable securing structure according to any one of claims 1 to 5, characterized by: It also includes a support part that can provide outward support for the upper clamping bar in the radial direction of the insulator, and a fixing block that can stabilize the cable in a fixed state is provided on the upper clamping bar or at the connection between the upper clamping bar and the lower clamping bar.

7. The cable securing structure according to claim 6, characterized by: The support portion is disposed on the inner or outer side of the lower clamping bar, and the inner or outer side of the support portion is arc-shaped and can contact the insulator or the lower clamping bar.

8. The cable securing structure according to claim 7, characterized by: The support part and the upper clamping strip are connected to each other to form an upper clamping strip assembly, which is fixed to the outside of the lower clamping strip.

9. The cable securing structure of claim 7, wherein: The upper and lower clamping strips are fixed together to form the main body of the fixed structure, and the support part is located on the inner or outer side of the main body of the fixed structure.

10. The cable securing structure of claim 7, wherein: The fixing block is a conical or pyramidal block, with the tip of the fixing block pointing towards the center side of the structure enclosed by the lower clamping strip.

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