Distribution network cable telescopic fixing device and fixing method

Abstract

The invention discloses a telescopic fixing device and a fixing method for a distribution network cable, belongs to the field of cable hoops, solves the problem of poor adaptability of a fixing device in the prior art, realizes adjustability of the fixing device, and adopts the technical scheme that the distance between a first hoop and a second hoop is adjustable, and the distance between the first hoop and the second hoop is adjustable. At least one of the first hoop and the second hoop is a telescopic hoop, the telescopic hoop comprises a first arc-shaped part and a second arc-shaped part, the first arc-shaped part is provided with a clamping opening extending in the circumferential direction, the inner wall of the clamping opening is provided with a plurality of limiting teeth arranged at intervals in the extending direction of the clamping opening, and the second arc-shaped part is provided with matching teeth matched with the limiting teeth; the second arc-shaped part is inserted into the clamping opening and is meshed with the limiting teeth at different positions through the matching teeth so as to adjust the size of the telescopic hoop, and the first arc-shaped part and the second arc-shaped part form a continuous first arc-shaped clamping surface in a connected state. The fixing device can be adjusted so as to adapt to cables of different sizes.

Description

Technical Field

[0001] This invention relates to the field of cable clamps, and in particular to a retractable fixing device and fixing method for distribution network cables. Background Technology

[0002] During the operation of power distribution networks, cables, as the key carriers of electrical energy transmission, are directly related to the safety and reliability of the power supply system due to their laying stability. Cable clamps, as core components supporting and fixing cables, must withstand multiple external forces over long periods, including the cable's own weight, thermal expansion and contraction stress, wind loads, and equipment vibration. If the clamps are not securely fastened or poorly fitted, the cable can easily shift, shake, or even detach, leading to insulation wear, short-circuit discharge, and even power outages.

[0003] To improve installation adaptability, various adjustable cable clamps have emerged in the prior art. For example, Chinese invention patent CN117578294A discloses an adjustable cable clamp, which includes a first clamp and a second clamp for being installed on opposite sides of the cable. The cable clamp only supports adjustment in one dimension, that is, the distance between the first clamp and the second clamp is adjustable, but the dimensions of the first clamp and the second clamp are fixed, and their inner arc contours cannot be changed. When the cable diameter is smaller than the inner diameter of the clamp, problems such as loose clamping and cable movement will occur; while when the cable diameter is slightly larger than the inner diameter of the clamp, it is difficult to install or forced installation will cause pressure damage to the insulation layer. Summary of the Invention

[0004] The purpose of this invention is to provide a retractable fixing device for power distribution cables, which solves the problem of poor adaptability of existing fixing devices and enables the fixing device to be adjustable to accommodate cables of different sizes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a retractable fixing device for distribution network cables, comprising a first clamp and a second clamp for being disposed on opposite sides of the cable, wherein the first clamp and the second clamp are respectively provided with an outwardly extending first connecting lug and a second connecting lug at their ends, the first connecting lug and the second connecting lug are connected by a connector, the distance between the first clamp and the second clamp is adjustable, at least one of the first clamp and the second clamp is a retractable clamp, the retractable clamp includes a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion is provided with a clamping opening extending circumferentially, the inner wall of the clamping opening is provided with a plurality of limiting teeth arranged at intervals along its extending direction, the second arc-shaped portion is provided with mating teeth adapted to the limiting teeth, the second arc-shaped portion is inserted into the clamping opening, and the size of the retractable clamp is adjusted by meshing with the limiting teeth at different positions through the mating teeth, the first arc-shaped portion and the second arc-shaped portion forming a continuous first arc-shaped clamping surface in the connected state.

[0006] After adopting the above technical solution, the present invention has the following advantages: By making the distance between the first clamp and the second clamp adjustable, it can initially adapt to cables of different sizes. Secondly, by designing at least one clamp as a telescopic structure, the clamping opening extending circumferentially on the first arc-shaped part and the insertion of the second arc-shaped part are matched. With the help of the meshing teeth on the second arc-shaped part and the limiting teeth at different positions on the inner wall of the clamping opening, the clamp's own size can be precisely adjusted, thus better adapting to the size of the cable. At the same time, the meshing structure of the limiting teeth and the meshing teeth not only achieves size positioning, but also provides reliable mechanical locking, significantly improving the rigidity and vibration resistance of the overall structure. Finally, when the first arc-shaped part and the second arc-shaped part are meshed, the first arc-shaped part and the second arc-shaped part together form a continuous first arc-shaped clamping surface, so that the clamp forms a more complete wrapping contact with the cable, and the clamping pressure is more evenly distributed along the circumference of the cable. When the cable's outer diameter is smaller than the clamp's original inner diameter, the second arc-shaped portion can be further inserted into the clamping opening, allowing the mating teeth to engage with the innermost limiting teeth, increasing the overlap area between the first and second arc-shaped portions. This reduces the diameter of the first arc-shaped clamping surface formed by the clamp, achieving tight clamping and minimizing cable movement during operation. When the cable's outer diameter is larger than the clamp's original inner diameter, the second arc-shaped portion can be pulled outwards, allowing the mating teeth to engage with the outermost limiting teeth, reducing the overlap area between the first and second arc-shaped portions, and thus increasing the diameter of the first arc-shaped clamping surface.

[0007] Furthermore, both the first connecting lug and the second connecting lug are provided with waist-shaped connecting holes. The connector passes through the corresponding waist-shaped connecting holes and fixes the first connecting lug and the second connecting lug. The installation position of the connector in the waist-shaped connecting hole is adjustable along the long axis of the waist-shaped connecting hole to adjust the relative position of the first clamp and the second clamp.

[0008] Using the aforementioned technical solution, the long axis adjustment characteristic of the waist-shaped connecting hole can work synergistically with the telescopic function of the clamp itself. This allows for precise adjustment of the clamp spacing to fit the cable diameter, while also fine-tuning the alignment of the two clamps. This ensures a tight and uniform fit between the first arc-shaped clamping surface and the cable surface, minimizing localized stress that could damage the cable insulation or cause cable movement due to gaps caused by poor fit. Furthermore, the slight movement of the connector within the waist-shaped connecting hole can buffer the displacement stress caused by thermal expansion and contraction, wind loads, or equipment vibration during long-term operation, reducing stress concentration at the clamp connection and lowering the risk of loosening or breakage of the connector.

[0009] Furthermore, the connector includes a bolt and a nut, the bolt passing through the waist-shaped connecting hole and being locked in place by the nut.

[0010] Using the aforementioned technical solution, the detachable nature of the bolts and nuts makes the installation, adjustment, and subsequent maintenance of the device simple. By tightening or loosening the nuts, the position of the connector in the waist-shaped connecting hole can be flexibly adjusted, thereby precisely adjusting the relative distance and centering of the first clamp and the second clamp. Combined with the size adjustment function of the telescopic clamp, it can quickly adapt to cables of different diameters.

[0011] Furthermore, the inner wall of one side of the clamping opening is provided with limiting teeth, and the second arc-shaped portion is provided with mating teeth on the corresponding side of the clamping opening; or, the inner walls of both sides of the clamping opening are provided with limiting teeth, and the two sides of the second arc-shaped portion are provided with mating teeth respectively.

[0012] The above technical solution simplifies the structure by setting a limiting tooth and a mating tooth on only one side, making it suitable for conventional power distribution scenarios with small cable loads and weak vibrations. The inner walls on both sides of the clamping opening are equipped with limiting teeth, and the two sides of the second arc-shaped part are also equipped with corresponding mating teeth, which can form a symmetrical meshing and locking structure. This makes the connection between the first arc-shaped part and the second arc-shaped part more uniformly stressed, significantly improving the shear resistance and overall rigidity of the plug-in structure. It is suitable for outdoor power distribution scenarios with large cross-section cables, high vibration environments, or those that need to withstand wind loads for a long time.

[0013] Furthermore, the limiting tooth penetrates the front and rear surfaces of the first arc-shaped portion, and the mating tooth penetrates the front and rear surfaces of the second arc-shaped portion.

[0014] By adopting the aforementioned technical solution, the through-type tooth structure significantly increases the meshing contact area between the limiting teeth and the mating teeth compared to the partially set teeth, effectively improving the connection strength and fatigue resistance of the telescopic clamp, and enabling it to withstand the circumferential stress caused by the cable's own weight, thermal expansion and contraction, and external vibration impact for a long time, thereby ensuring reliable locking after clamp size adjustment.

[0015] Furthermore, both the first and second clamps have an elastic protective layer on their inner sidewalls.

[0016] Through the above technical solutions, the elastic protective layer can adapt to cables with different surface conditions. During the clamping process, the elastic protective layer achieves a proper fit with the cable surface through its own deformation, effectively filling microscopic uneven areas and improving contact uniformity. At the same time, the elastic protective layer can absorb external vibration energy, playing a buffering and vibration reduction role. Moreover, it can also avoid hard scratches, indentations or wear caused by metal or hard plastic parts to the cable surface as much as possible, thereby ensuring the integrity and electrical safety of the cable during long-term operation.

[0017] Furthermore, the thickness of the elastic protective layer is D1. .

[0018] Through the above technical solutions, if the thickness of the elastic protective layer is less than 2mm, its compression deformation is limited, making it difficult to effectively fill the gap between the cable surface and the inner wall of the clamp, resulting in insufficient clamping fit. Simultaneously, an excessively thin elastic protective layer has weak buffering capacity and cannot fully absorb external impact energy, significantly reducing its protective effect on the cable. Conversely, if the thickness of the elastic protective layer is greater than 3mm, the excessively thick flexible layer is prone to lateral bulging or local buckling during clamping, reducing clamping stability and causing the cable to sway during operation. Furthermore, excessive compression stroke will occupy the effective stroke space of the clamp adjustment mechanism, limiting the adaptability of the telescopic clamp to different cable outer diameters, and even causing loose gaps to remain even in the clamped state. Therefore, setting the thickness of the elastic protective layer to... It is sufficient to generate sufficient elastic deformation, achieve a tight fit with the cable surface, and effectively absorb vibration energy during operation, without interfering with the size adjustment function of the clamp itself. Thus, it takes into account both cable protection and device functionality, and significantly improves the long-term operational reliability of distribution network cable fixing devices.

[0019] Furthermore, the first clamp and the second clamp each include a rigid layer and an elastic protective layer, wherein the thickness of the elastic protective layer is D1 and the thickness of the rigid layer is D2. .

[0020] Through the above technical solution, when At this time, if the rigid layer accounts for too high a proportion, the overall stiffness of the clamping ring is too large, resulting in a lack of necessary flexible buffering during clamping. Even if the elastic protective layer has a certain absolute thickness, its deformation capacity is still severely constrained by the rigid substrate, making it difficult to fully conform to the microscopic contours of the cable surface; when When the elastic protective layer accounts for too high a proportion, the supporting effect of the rigid layer on the overall structure is weakened. Under clamping force or external load, the clamp is prone to arc-shaped surface collapse or deflection of the connection part. This not only reduces the positioning accuracy and locking reliability of the size adjustment mechanism, but may also lead to uneven distribution of clamping force, which may cause local loosening or slippage of the cable. Therefore, the elastic protective layer should be limited to a range of 0.1 to 0.2 to ensure that the rigid layer is sufficient to maintain the geometric stability, load-bearing capacity and stiffness of the adjustment mechanism of the clamp, while giving the elastic protective layer sufficient relative deformation freedom so that it can independently play the functions of buffering, fitting and vibration reduction when under pressure.

[0021] Furthermore, the first clamp is a retractable clamp, the second clamp is an integrally formed structure, the second clamp is provided with a second arc-shaped clamping surface, and the second arc-shaped clamping surface is arranged opposite to the first arc-shaped clamping surface.

[0022] Through the above technical solutions, the telescopic design of the first clamp can flexibly adapt to cables of different diameters, while the second clamp adopts an integral molding structure, which has stronger structural rigidity and bending resistance compared to the telescopic structure. It can provide a stable and reliable support benchmark, avoid the superposition or accumulation of adjustment degrees of freedom that may occur when both sides are telescopic structures, and ensure the centering and stability during clamping. During assembly, the second clamp serves as a reference, and the first clamp can be adaptively adjusted according to the arc contour of the second clamp to ensure that the inner clamping surfaces of the two are aligned after closing as much as possible.

[0023] Another object of the present invention is to provide a retractable fixing method for distribution network cables, including the retractable fixing device for distribution network cables as described in any of the above technical solutions, wherein the retractable fixing method for distribution network cables includes:

[0024] S1: Prepare the first clamp and the second clamp, and estimate and select the connectors according to the diameter of the cable;

[0025] S2: Place the first arc-shaped part and the second arc-shaped part on the cable surface, insert the second arc-shaped part into the clamping opening, and move the second arc-shaped part so that the first arc-shaped clamping surface fits against the cable;

[0026] S3; Align the first clamp and the second clamp on both sides of the cable, and use the connector to initially connect the first connecting lug and the second connecting lug through the waist-shaped connecting hole;

[0027] S4: Move the first clamp and the second clamp, and adjust the installation position of the connector in the waist-shaped connecting hole along the long axis of the waist-shaped connecting hole. After the first clamp and the second clamp are in contact with the cable, tighten the connector.

[0028] The above technical solution allows for coarse adjustment of the cable diameter through the meshing of the retractable clamp, quickly matching the main dimensional differences. Then, the waist-shaped connecting hole is used to slightly compensate the relative position of the two clamps before locking, minimizing local gaps caused by manufacturing tolerances, installation offsets, or cable ellipticity, making the inner side of the clamp fit more evenly with the cable surface, and avoiding single-point overpressure or loosening as much as possible. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the retractable fixing device for distribution network cables in Embodiment 1 of the present invention;

[0031] Figure 2 This is a structural schematic diagram of the retractable fixing device for distribution network cables from another perspective in Embodiment 1 of the present invention;

[0032] Figure 3This is an exploded view of the retractable fixing device for distribution network cables in Embodiment 1 of the present invention;

[0033] Figure 4 This is a flowchart of the retractable fixing method for distribution network cables in Embodiment 2 of the present invention;

[0034] In the figure, 10 is the first clamp; 11 is the first connecting lug; 12 is the first arc-shaped part; 121 is the clamping opening; 122 is the limiting tooth; 13 is the second arc-shaped part; 131 is the mating tooth; 14 is the waist-shaped connecting hole; 15 is the first arc-shaped clamping surface; 20 is the second clamp; 21 is the second connecting lug; 22 is the mounting base; 23 is the second arc-shaped clamping surface; 24 is the rigid layer; 25 is the elastic protective layer; 30 is the connector; 31 is the bolt; and 32 is the nut. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0037] It should be understood that in the various embodiments of the present invention, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0038] It should be understood that in this invention, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0039] It should be understood that in this invention, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0040] The technical solution of the present invention will be described in detail below with reference to specific embodiments. The following specific embodiments may be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0041] Example 1:

[0042] like Figures 1 to 3 As shown, the present invention provides a retractable fixing device for distribution network cables, including a first clamp 10 and a second clamp 20 for being disposed on opposite sides of the cable. The first clamp 10 and the second clamp 20 have outwardly extending first connecting lugs 11 and second connecting lugs 21 at their respective ends. The first connecting lugs 11 and the second connecting lugs 21 are connected by a connector 30. The distance between the first clamp 10 and the second clamp 20 is adjustable. At least one of the first clamp 10 and the second clamp 20 is a retractable clamp, which includes a first arc-shaped portion 12. The first arc-shaped part 12 has a clamping opening 121 extending circumferentially. The inner wall of the clamping opening 121 has a plurality of limiting teeth 122 arranged at intervals along its extension direction. The second arc-shaped part 13 has a mating tooth 131 that matches the limiting tooth 122. The second arc-shaped part 13 is inserted into the clamping opening 121 and engages with the limiting tooth 122 at different positions through the mating tooth 131 to adjust the size of the telescopic clamp. The first arc-shaped part 12 and the second arc-shaped part 13 form a continuous first arc-shaped clamping surface 15 when connected.

[0043] By making the spacing between the first clamp 10 and the second clamp 20 adjustable, it can initially adapt to cables of different sizes. Secondly, at least one clamp is designed as a telescopic structure. Through the insertion and cooperation of the clamping opening 121 extending circumferentially on the first arc-shaped part 12 and the second arc-shaped part 13, and by the engagement of the mating teeth 131 on the second arc-shaped part 13 with the limiting teeth 122 at different positions on the inner wall of the clamping opening 121, the clamp's own size can be precisely adjusted, thereby better adapting to the size of the cable. At the same time, the engagement structure of the limiting teeth 122 and the mating teeth 131 not only achieves size positioning, but also provides reliable mechanical locking, improving the rigidity and vibration resistance of the overall structure. Finally, when the first arc-shaped part 12 and the second arc-shaped part 13 are engaged, the first arc-shaped part 12 and the second arc-shaped part 13 together form a continuous first arc-shaped clamping surface 15, so that the clamp forms a more complete wrapping contact with the cable, and the clamping pressure is more evenly distributed along the circumference of the cable. When the outer diameter of the cable is smaller than the original inner diameter of the clamp, the second arc-shaped portion 13 can be further inserted into the clamping opening 121, so that the mating teeth 131 engage with the innermost limiting teeth 122, increasing the overlap area between the first arc-shaped portion 12 and the second arc-shaped portion 13, thereby reducing the diameter of the first arc-shaped clamping surface 15 formed by the clamp, achieving tight clamping, and suppressing the cable movement during operation as much as possible; when the outer diameter of the cable is larger than the original inner diameter of the clamp, the second arc-shaped portion 13 can be pulled outward, so that the mating teeth 131 engage with the outermost limiting teeth 122, reducing the overlap area between the first arc-shaped portion 12 and the second arc-shaped portion 13, thereby increasing the diameter of the first arc-shaped clamping surface 15.

[0044] The first clamp 10 is a telescopic clamp that can flexibly adapt to cables of different diameters. The second clamp 20 is an integrally formed structure with a second arc-shaped clamping surface 23, which is opposite to the first arc-shaped clamping surface 15. Compared to the telescopic structure, the second clamp 20 has higher overall rigidity and stronger bending resistance due to the absence of moving parts and splicing gaps. It can provide a stable and reliable support reference for the cable and also avoid the superposition or accumulation of adjustment freedom that may occur when both sides are telescopic structures. In addition, the outer side of the second clamp 20 has an integrally formed mounting base 22, which is used to fix it to the support structure such as pole, bracket or distribution cabinet, and maintains its position throughout the assembly process, serving as a positioning reference. During actual installation, the operator can first fix the second clamp 20 in place through its base, and then bring the first clamp 10, which has been pre-adjusted to the size, closer to the cable from the opposite side. At this time, the first clamp 10 can be adaptively fine-tuned according to the predetermined arc contour of the second clamp 20 to ensure that the inner clamping surfaces are centered after the two clamps are closed.

[0045] To further enhance adaptability to cables of different sizes, both the first connecting lug 11 and the second connecting lug 21 are provided with oblong connecting holes 14. The connector 30 passes through the corresponding oblong connecting holes 14 and fixes the first connecting lug 11 and the second connecting lug 21. During installation, the installation position of the connector 30 in the oblong connecting hole 14 can be adjusted along its long axis, thereby changing the relative distance between the first clamp 10 and the second clamp 20, so that the arc-shaped clamping surfaces on the inner sides of the two clamps can achieve a tight fit according to the actual outer diameter of the cable. In addition, during long-term operation of the cable, it may experience slight displacement or dynamic load due to factors such as thermal expansion and contraction, wind load, or equipment vibration. At this time, the connector 30 can slip slightly within the oblong connecting hole 14, which acts as a stress buffer, absorbs some displacement energy, reduces the rigid constraint and stress concentration of the clamp, reduces the risk of the connector 30 loosening or breaking due to fatigue, and improves the overall durability and operational reliability of the device.

[0046] Specifically, the connector 30 includes a bolt 31 and a nut 32. The bolt 31 passes through the oblong connecting hole 14 and is locked in place by the nut 32. The detachable nature of the bolt 31 and nut 32 simplifies the installation, adjustment, and subsequent maintenance of the device. The position of the connector 30 within the oblong connecting hole 14 can be flexibly adjusted by tightening or loosening the nut 32, thereby precisely adjusting the relative distance and alignment between the first clamp 10 and the second clamp 20. Combined with the size adjustment function of the telescopic clamp, it enables rapid adaptation to cables of different diameters.

[0047] To further adapt to cables of different sizes, both the first clamp 10 and the second clamp 20 adopt a composite structure, including an outer rigid layer 24 and an inner elastic protective layer 25. The rigid layer 24 is made of metal or high-strength engineering plastic and serves as the main load-bearing structure of the clamp, used to maintain the overall geometry and transmit clamping load. The elastic protective layer 25 is covered on the side of the rigid layer 24 facing the cable and is made of flexible materials such as rubber, silicone, or thermoplastic elastomer. During the clamping process, the elastic protective layer 25 adapts to the outer surface of the cable through its own compression and deformation, filling as much as possible the micro-uneven areas formed by manufacturing tolerances, sheath textures, or aging wrinkles, making the contact pressure distribution more uniform. At the same time, the elastic protective layer 25 can absorb the external impact energy from wind loads, equipment vibrations, or short-circuit electric forces, playing a buffering and vibration reduction role. In addition, since the cable is always in contact with the flexible material, the rigid layer 24 is prevented from directly scratching, crushing, or abrading the cable insulation layer, thereby effectively ensuring the integrity of the cable outer sheath and electrical safety during long-term operation.

[0048] The thickness of the elastic protective layer 25 is D1. If the thickness of the elastic protective layer 25 is less than 2mm, its compression deformation is limited, making it difficult to effectively fill the gap between the cable surface and the inner wall of the clamp, resulting in insufficient clamping fit. Simultaneously, an excessively thin elastic protective layer 25 has weak buffering capacity and cannot fully absorb external impact energy, significantly reducing its protective effect on the cable. Conversely, if the thickness of the elastic protective layer 25 is greater than 3mm, an excessively thick elastic protective layer 25 is prone to lateral bulging or local buckling during clamping, reducing clamping stability and causing the cable to sway during operation. Furthermore, an excessively large compression stroke will occupy the effective stroke space of the clamp adjustment mechanism, limiting the adaptability of the telescopic clamp to different cable outer diameters, and even causing loose gaps to remain even when clamped. Therefore, in this application, the thickness of the elastic protective layer 25 is set to... It is sufficient to generate sufficient elastic deformation, achieve a tight fit with the cable surface, and effectively absorb vibration energy during operation without interfering with the clamp's own size adjustment function. For example, in a preferred embodiment, the thickness of the elastic protective layer 25 is 2.5mm, which takes into account buffer performance, fit effect and adjustment compatibility, and significantly improves the reliability of the device and the level of cable protection during long-term operation.

[0049] Wherein, the thickness of the rigid layer 24 is D2, when At this time, the rigid layer 24 has an excessively high proportion, and the overall stiffness of the clamp is too large, resulting in a lack of necessary flexible buffering during clamping. At this time, even if the elastic protective layer 25 has a certain absolute thickness, its deformation capacity is still severely constrained by the rigid substrate, making it difficult to fully conform to the microscopic contours of the cable surface; when When the elastic protective layer 25 accounts for too high a proportion, the supporting effect of the rigid layer 24 on the overall structure is weakened. Under clamping force or external load, the clamp is prone to arc-shaped surface collapse or deflection of the connection part. This not only reduces the positioning accuracy and locking reliability of the size adjustment mechanism, but may also lead to uneven distribution of clamping force, which may cause local loosening or slippage of the cable. Therefore, in this application, The rigid layer 24 effectively maintains the geometric stability, structural load-bearing capacity, and stiffness required for the adjustment mechanism of the clamp, while the elastic protective layer 25 obtains sufficient relative deformation freedom and can independently perform buffering, fitting, and vibration reduction functions under pressure, achieving an optimal match between rigidity and flexibility. For example, in a preferred embodiment, At this point, the rigid layer 24 provides sufficient support, while the elastic protective layer 25 still has effective deformation capacity, taking into account both the functionality of the device and the protection of the cable, and significantly improving the long-term operational reliability.

[0050] To improve the reliability of the connection between the first arc-shaped portion 12 and the second arc-shaped portion 13, the limiting tooth 122 penetrates the front and rear surfaces of the first arc-shaped portion 12, and the mating tooth 131 penetrates the front and rear surfaces of the second arc-shaped portion 13. Compared with non-penetrating teeth that are only provided on local surfaces, the penetrating teeth significantly increase the effective meshing contact area between the limiting tooth 122 and the mating tooth 131, allowing the load to be uniformly transmitted along the entire thickness direction. This not only improves the connection strength and shear resistance of the telescopic clamp, but also greatly enhances its fatigue resistance under alternating loads. This ensures that it can reliably resist the circumferential stress caused by the cable's own weight, thermal expansion and contraction, as well as external impacts such as wind loads and equipment vibrations during long-term operation, and minimizes the risk of slippage, loosening, or tooth breakage after adjustment. During actual installation, the operator first estimates the required clamp size based on the cable's outer diameter and aligns the mating teeth 131 on the second arc-shaped portion 13 with the corresponding limiting teeth 122 in the clamping opening 121. Then, the second arc-shaped portion 13 is slid laterally into the clamping opening 121 from the end of the first arc-shaped portion 12 until fully engaged. Since the limiting teeth 122 and the mating teeth 131 engage and position each other during insertion, the second arc-shaped portion 13 cannot move relative to the first arc-shaped portion 13 in the circumferential direction after insertion. This ensures that the adjustment position is reliably locked once set, minimizing dimensional deviations during subsequent installation or operation.

[0051] It should be noted that the side of the clamping opening 121 is open. After the second arc-shaped part 13 moves to the corresponding position, it enters the clamping opening 121 from the open, so that the limiting tooth 122 meshes with the mating tooth 131.

[0052] In this embodiment, a limiting tooth 122 is provided on one side of the inner wall of the clamping opening 121, and a mating tooth 131 is provided on the corresponding side of the second arc-shaped part 13 and the clamping opening 121. After the second arc-shaped part 13 is inserted, the two achieve single-sided meshing and positioning. During assembly, the meshing position can be quickly aligned by visual inspection or touch, which improves the convenience of on-site operation.

[0053] Understandably, in other embodiments, the second clamp can also be a telescopic clamp, while the first clamp adopts an integrally formed fixed arc-shaped structure; furthermore, both the first and second clamps can be designed as telescopic clamps, that is, each clamp includes a first arc-shaped part and a second arc-shaped part that interlock, and their respective dimensions can be independently adjusted by the meshing of limiting teeth and mating teeth. The above different configurations can be flexibly selected according to the actual application scenario: single-sided telescopic is suitable for most conventional laying scenarios, taking into account both adjustment capability and structural rigidity; double-sided telescopic is suitable for special working conditions with a large range of cable diameter variations or high requirements for clamping symmetry, and can achieve higher precision adaptive fitting.

[0054] Understandably, in other embodiments, the inner walls on both sides of the clamping opening are provided with limiting teeth, and the two sides of the second arc-shaped part are provided with corresponding mating teeth, which can form a symmetrical meshing locking structure, making the connection between the first arc-shaped part and the second arc-shaped part more uniformly stressed, significantly improving the shear resistance and overall rigidity of the plug-in structure, and is suitable for outdoor power distribution scenarios with large cross-section cables, high vibration environments, or long-term wind loads.

[0055] Example 2:

[0056] like Figure 4 As shown, in this embodiment, a retractable fixing method for distribution network cables is provided, including a retractable fixing device for distribution network cables as described in any of the above technical solutions. The retractable fixing method for distribution network cables includes:

[0057] S1: Prepare the first clamp and the second clamp, and estimate and select the connectors according to the diameter of the cable;

[0058] S2: Place the first arc-shaped part and the second arc-shaped part on the surface of the cable, insert the second arc-shaped part into the clamping opening, and move the second arc-shaped part so that the first arc-shaped clamping surface fits against the cable;

[0059] S3; Align the first clamp and the second clamp on both sides of the cable, and use the connector to initially connect the first connecting lug and the second connecting lug through the waist-shaped connecting hole;

[0060] S4: Move the first clamp and the second clamp, and adjust the installation position of the connector in the waist-shaped connecting hole along the long axis of the waist-shaped connecting hole. After the first clamp and the second clamp are in contact with the cable, tighten the connector.

[0061] The cable diameter can be coarsely adjusted by the meshing of the retractable clamp, quickly matching the main size differences. Then, the waist-shaped connecting hole is used to make slight compensation for the relative position of the two clamps before locking, so as to eliminate local gaps caused by manufacturing tolerances, installation offsets or cable ellipticity as much as possible, making the inner side of the clamp fit more evenly with the cable surface, and avoiding single-point overpressure or loosening as much as possible.

[0062] Furthermore, S5: If the fixed state needs to be adjusted due to cable replacement, thermal expansion and contraction, or maintenance needs, simply loosen the connector and repeat steps S2 to S4 to complete the adjustment, achieving convenient readjustment of the device without replacing parts or disassembling the overall structure.

[0063] In addition to the preferred embodiments described above, the present invention has other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

Claims

1. A distribution cable telescopic fixing device, comprising a first clamp and a second clamp for being arranged on opposite sides of the cable, two ends of the first clamp and the second clamp are respectively provided with a first connecting lug and a second connecting lug extending outward, the first connecting lug and the second connecting lug are connected through a connecting piece, and the distance between the first clamp and the second clamp is adjustable, characterized in that, At least one of the first and second hoops is a telescopic hoop, the telescopic hoop comprising a first arc-shaped part and a second arc-shaped part, the first arc-shaped part being provided with a clamping opening extending in a circumferential direction, an inner wall of the clamping opening being provided with a plurality of limiting teeth arranged at intervals along the extending direction of the clamping opening, the second arc-shaped part being provided with a plurality of matching teeth matched with the limiting teeth, the second arc-shaped part being inserted into the clamping opening and being engaged with the limiting teeth at different positions through the matching teeth to adjust the size of the telescopic hoop, the first arc-shaped part and the second arc-shaped part forming a continuous first arc-shaped clamping surface in a connected state.

2. The network cable retractable mounting device of claim 1, wherein, The first and second connecting lugs are each provided with a waist-shaped connecting hole, the connecting piece penetrating through the corresponding waist-shaped connecting hole and fixedly connecting the first and second connecting lugs, the mounting position of the connecting piece in the waist-shaped connecting hole being adjustable along the long axis direction of the waist-shaped connecting hole to adjust the relative position of the first and second hoops.

3. The network cable retractable mounting device of claim 2, wherein, The connecting piece comprises a bolt and a nut, the bolt penetrating through the waist-shaped connecting hole and being locked and fixed through the nut.

4. The network cable retracting fixture of claim 1, wherein, The inner wall of one side of the clamping opening is provided with limiting teeth, and the second arc-shaped part is provided with matching teeth corresponding to the side of the clamping opening; or the inner walls of both sides of the clamping opening are each provided with limiting teeth, and the second arc-shaped part is provided with matching teeth corresponding to both sides.

5. The network cable retractable mounting device of claim 1, wherein, The limiting teeth penetrate through the front and rear surfaces of the first arc-shaped part, and the matching teeth penetrate through the front and rear surfaces of the second arc-shaped part.

6. The networkable cable retractable mounting apparatus of claim 1, wherein, The inner walls of the first and second hoops are each provided with an elastic protective layer.

7. The network cable retractable mounting device of claim 6, wherein, The thickness of the elastic protective layer is D1, .

8. The network cable retractable mounting device of claim 1, wherein, The first and second hoops comprise a rigid layer and an elastic protective layer, the thickness of the elastic protective layer being D1 and the thickness of the rigid layer being D2, .

9. The network cable retractable mounting device of claim 1, wherein, The first hoop is a telescopic hoop, and the second hoop is an integral structure, the second hoop being provided with a second arc-shaped clamping surface opposite to the first arc-shaped clamping surface.

10. A method of stretchable fixing of a distribution cable, characterized in that, The network cable telescopic fixing device comprises the network cable telescopic fixing device according to claim 2 or 3, and the network cable telescopic fixing method comprises the following steps: S1: preparing a first hoop and a second hoop, and selecting a connecting piece according to the diameter of the cable; S2: placing the first arc-shaped part and the second arc-shaped part on the surface of the cable, inserting the second arc-shaped part into the clamping opening, and moving the second arc-shaped part to make the first arc-shaped clamping surface adhere to the cable; S3: aligning the first hoop and the second hoop on both sides of the cable, and preliminarily connecting the first connecting lug and the second connecting lug through the waist-shaped connecting hole; S4: moving the first hoop and the second hoop, adjusting the mounting position of the connecting piece in the waist-shaped connecting hole along the long axis direction of the waist-shaped connecting hole, and then tightening the connecting piece after the first hoop and the second hoop adhere to the cable.

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