Power cable clamp for pipeline

Abstract

The utility model discloses a power cable clamp for a pipeline. The power cable clamp comprises an aluminum alloy fixing piece, a buffer rubber pad, a fixing bolt and a memory alloy spring, the utility model solves the problems that the clamping force cannot be dynamically adjusted and the pipeline is easy to damage; the clamping force is dynamically adjusted through temperature control deformation of the memory alloy spring, and the clamping device is suitable for pipelines with different pipe diameters and has good universality and stability; meanwhile, the smooth aluminum alloy edge and the buffer rubber pad are arranged to perform dual protection on the pipeline, so that the installation clamp is not damaged, and the service life of the cable is prolonged; moreover, after the clamp penetrates through the pipe, the memory alloy is triggered to deform only by heating, secondary manual fastening is not needed, the construction process is simplified, and the installation efficiency and safety are improved; in addition, the fixing piece made of aluminum alloy is used, so that eddy current loss is avoided, and the quality of power transmission is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cable clamp technology, specifically a power cable clamp for pipelines. Background Technology

[0002] Laying power cables in vertical conduits, such as J-shaped pipes in offshore substations or converter stations, presents numerous challenges. Cables with vertical lengths reaching tens of meters are difficult to install and secure using conventional cable clamps within the conduit, forcing them to withstand their own immense weight. Traditional cable fixing methods are inadequate for such demanding scenarios, impacting not only the safe and stable operation of the cables but also their potential for damage due to uneven stress, ultimately affecting the reliability of the entire power system.

[0003] For example, the "Intermediate Fixing Device for Vertical Concealed Cable Laying" disclosed in patent number CN214314308U includes a rear fixing plate and a front fixing plate. The rear fixing plate has through holes on its upper and lower sides, with rubber sleeves embedded in the surface of the through holes. The rear fixing plate has mounting grooves at its upper and lower ends in the middle, with cable grooves distributed inside. Gaskets are adhered to the inner walls of the cable grooves. The rear fixing plate is connected to a pressure plate clamp by bolts, with nuts attached to the top of the bolts. A pressure spring is connected to the rear end of the pressure plate clamp, and positioning holes are provided at both ends of the pressure plate clamp. This intermediate fixing device for vertical concealed cable laying incorporates gaskets that completely enclose the cable groove, forming a flexible structure. These gaskets fill and protect the cable during insertion, reducing the impact of vibration caused by external stimuli, wear and tear on the cable groove, and deformation under pressure, thus providing cushioning and protection and improving the cable's service life.

[0004] However, the above-mentioned devices rely on bolts or clips for mechanical locking, and cannot dynamically adjust the clamping force. They are only suitable for fixing pipes of one diameter, and the edges of the metal clamps rub against the inner wall of the pipe, which may scratch the pipe with long-term use. Utility Model Content

[0005] The purpose of this utility model is to provide a power cable clamp for pipelines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A power cable clamp for pipelines includes an aluminum alloy fastener, a buffer rubber pad, a fixing bolt, and a shape memory alloy spring;

[0008] The aluminum alloy fastener consists of two symmetrically arranged concentric semicircular rings with smooth edges, which are connected by a fixing bolt.

[0009] The cushioning rubber pad is fixed to the inside of the concentric semicircular ring;

[0010] The power cable is installed inside the buffer rubber pad;

[0011] Multiple shape memory alloy springs are installed at equal angles on the outer periphery of the aluminum alloy fixing component, and the shape memory alloy springs elongate when heated.

[0012] Preferably, the two concentric semicircular rings have lugs on the upper and lower sides of their mating surfaces that are compatible with the fixing bolts.

[0013] Preferably, the outer circumference of the aluminum alloy fastener is provided with multiple cylindrical holes at equal angles that are adapted to the shape memory alloy spring.

[0014] Preferably, the cushioning rubber pad comprises multiple layers of rubber pads, with adjacent rubber pads bonded together by a peelable adhesive layer.

[0015] Preferably, each layer of the rubber pad has the same thickness, and adjacent rubber layers have different colors.

[0016] Compared with existing technologies, the advantages of this invention are as follows: This invention dynamically adjusts the clamping force by controlling the temperature deformation of the shape memory alloy spring, making it suitable for pipes of different diameters and exhibiting good versatility and stability. Simultaneously, the smooth aluminum alloy edge and buffer rubber pad provide double protection for the pipe, achieving a damage-free installation clamp and extending the cable's service life. Furthermore, after the clamp is inserted into the pipe, only heating is needed to trigger the shape memory alloy deformation, eliminating the need for secondary manual tightening, simplifying the construction process, and improving installation efficiency and safety. In addition, the use of aluminum alloy fasteners avoids eddy current losses, ensuring the quality of power transmission. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded view of the components of this utility model.

[0020] 1. Aluminum alloy fasteners; 2. Buffer rubber pads; 3. Fixing bolts; 4. Memory alloy springs. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] One embodiment of this utility model:

[0023] A type of power cable clamp for pipelines, such as Figures 1-2 As shown, it includes an aluminum alloy fastener 1, a buffer rubber pad 2, a fixing bolt 3, and a shape memory alloy spring 4.

[0024] The aluminum alloy fastener 1 consists of two symmetrically arranged concentric semicircular rings with smooth edges. The smooth edges reduce frictional resistance when the device is inserted into the pipe, allowing it to pass smoothly and avoiding damage. Four lugs, compatible with fixing bolts 3, are provided on the upper and lower sides of the mating surfaces of the two concentric semicircular rings, ensuring a tight connection between the two rings and clamping the power cable. Four cylindrical holes, compatible with shape memory alloy springs 4, are provided at equal angles on the outer circumference of the aluminum alloy fastener 1 for installing the springs. Furthermore, the aluminum alloy fastener 1 is made of aluminum alloy, effectively avoiding eddy current losses caused by electromagnetic induction and ensuring high efficiency and stability of power transmission.

[0025] The buffer rubber pad 2 is set inside the concentric semi-circular ring so that it comes into contact with the power cable. Its main function is to protect the power cable and prevent damage such as wear on the power cable sheath caused by direct contact between the aluminum alloy fastener 1 and the power cable during the fixing process. At the same time, it can also play a certain buffering role to reduce the impact of vibration of the power cable caused by its own weight or external environmental factors on the aluminum alloy fastener 1.

[0026] The fixing bolt 3 securely connects the two symmetrical concentric semicircular rings together by passing through the lugs of the aluminum alloy fixing piece 1, ensuring stable clamping of the power cable.

[0027] The shape memory alloy spring 4 is installed in the pre-drilled cylindrical hole of the aluminum alloy fixing part 1 (concentric semi-circular ring). The shape memory alloy spring 4 has the characteristic of returning to its original shape and stretching when heated. When installing the cable clamp, the cable clamp is first used to clamp the power cable, and then the power cable is inserted into the pipe. At this time, because the edge of the aluminum alloy fixing part 1 is smooth, the power cable can pass through the pipe smoothly. Then, the cable clamp is heated by local heating with hot water, which causes the shape memory alloy spring 4 to return to its original shape and stretch, thereby fixing the cable clamp to the inner wall of the pipe.

[0028] First, select a cable clamp of appropriate size according to the specifications of the power cable to be laid and the inner diameter of the pipe. Check whether the shape memory alloy spring 4 can work normally. If it can work normally, assemble the aluminum alloy fixing part 1, the buffer rubber pad 2, the fixing bolt 3, and the shape memory alloy spring 4 together. Next, clamp the power cable inside the aluminum alloy fixing part 1. Then, slowly insert the cable clamp holding the power cable into the pipe to deliver the power cable to the designated position inside the pipe. Afterward, when the cable clamp reaches the predetermined position inside the pipe, use a local heating device to heat the shape memory alloy spring 4 through a hot water spray system. The heating temperature is above the phase transition temperature of the shape memory alloy spring 4, causing the shape memory alloy spring 4 to return to its original shape and begin to stretch. As the shape memory alloy spring 4 stretches, the cable clamp gradually moves closer to the inner wall of the pipe and finally firmly clamps onto the inner wall of the pipe, completing the fixation of the power cable inside the pipe.

[0029] Furthermore, the buffer rubber pad 2 comprises multiple layers of rubber pads of different colors and uniform thicknesses, pressed together according to design requirements. Adhesive of a certain strength is added to adjacent rubber pads to form an adhesive layer (thickness negligible). The adhesive layer has low adhesion and can be manually torn to separate adjacent rubber pads. In power engineering construction, when encountering cables that need to be clamped, the outer diameter of the cable is first measured. Based on the measurement results, the thickness of the buffer rubber pad 2 that needs to be adjusted is calculated. For example, if the outer diameter of the cable is 20mm larger than the standard size, and the thickness of each rubber pad is known to be 5mm, then 4 layers of rubber pads need to be removed. Along the layered structure of the rubber pads, the corresponding number of rubber pads are removed, and then the cable is placed in the clamp. The cable is stably clamped by the fastening action of the aluminum alloy body 1.

[0030] In the description of this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A power cable clamp for use with a pipe, characterized by: It includes an aluminum alloy fastener (1), a buffer rubber pad (2), a fixing bolt (3), and a shape memory alloy spring (4); The aluminum alloy fastener (1) consists of two concentric semicircular rings with smooth edges arranged symmetrically, and the two concentric semicircular rings are connected by a fixing bolt (3). The buffer rubber pad (2) is fixed to the inner side of the concentric semicircular ring; The power cable is installed inside the buffer rubber pad (2); Multiple shape memory alloy springs (4) are installed at equal angles on the outer periphery of the aluminum alloy fastener (1). The shape memory alloy springs (4) elongate when heated.

2. A power cable clamp for a pipe according to claim 1, characterized in that: The two concentric semicircular rings have lugs on the upper and lower sides of their mating surfaces that are compatible with the fixing bolts (3).

3. A power cable clamp for pipelines according to claim 1, characterized in that: The outer circumference of the aluminum alloy fastener (1) is provided with multiple cylindrical holes that are compatible with the shape memory alloy spring (4) at equal angles.

4. A power cable clamp for pipelines according to claim 1, characterized in that: The cushioning rubber pad (2) comprises multiple layers of rubber pads, with adjacent rubber pads bonded together by a tear-off adhesive layer.

5. A power cable clamp for pipelines according to claim 4, characterized in that: Each layer of the rubber pad has the same thickness, and adjacent rubber layers have different colors.

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