Cable clamp for electric power

Abstract

The utility model relates to a cable clamp for electric power belongs to electric power equipment technical field, including first connecting block and the second connecting block of connecting first connecting block, the lower extreme of first connecting block and second connecting block is equipped with adjustable movable link, the lower extreme of upper fixed block is equipped with lower clamping block through bolt, the lower extreme of movable link is equipped with adjustable adjusting clamp, the utility model discloses adjustable movable link and adjusting clamp are set up, and the adjustment performance and adaptability of cable clamp are improved significantly. The ball of movable link upper end cooperates with the recess on first connecting block and second connecting block, makes movable link angle flexible adjustment, and the fixed effect of cooperation fixed disc and limiting bolt can satisfy the installation angle demand under different construction scene, the spring in adjusting clamp can drive upper clamping block to move up and down to adapt to the clamping demand of different diameter cable, need not to replace different model cable clamp, reduces construction cost, improves construction efficiency.

Description

Technical Field

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

[0002] In the process of power engineering construction and power equipment installation, cable fixing is a crucial step. As a key component used to fix cables, the performance of cable clamps directly affects the stability and safety of cable installation.

[0003] Most existing power cable clamps suffer from poor adjustability. On one hand, they are difficult to adjust the clamping force and range flexibly according to the actual diameter of the cable, resulting in low compatibility with different cable specifications. When fixing cables of various diameters, different models of cable clamps are often required, increasing construction costs and reducing efficiency. On the other hand, the installation angle and height of the cable clamps are inconvenient to adjust, making it difficult to meet diverse installation needs in complex construction environments. This can lead to uneven stress on the cable after installation, causing wear, loosening, or even detachment over time, posing safety hazards. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problems by providing a cable clamp for power applications.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A power cable clamp includes a first connecting block and a second connecting block connected to the first connecting block. The first connecting block and the second connecting block are fixedly connected by bolts. An adjustable movable rod is installed at the lower end of the first connecting block and the second connecting block.

[0007] An upper fixing block is installed on the outer side of the lower end of the movable rod, and a lower clamping block is installed on the lower end of the upper fixing block by bolts;

[0008] An adjustable clamp is installed at the lower end of the movable rod.

[0009] Preferably, the adjusting clamp includes a movable groove formed inside the lower end of the movable rod, a spring is installed in the movable groove, an upper clamping block is installed at the lower end of the spring and below the upper fixed block, and protrusions are installed at both ends of the upper clamping block.

[0010] Preferably, guide blocks for cable guiding and extension are installed at both ends of the lower clamping block, and the guide blocks have a downward bending structure.

[0011] Preferably, the outer sides of the guide block and the upper clamping block are fitted with spring coils for limiting the position.

[0012] Preferably, a ball is installed at the upper end of the movable rod, and grooves for matching the ball are opened at the lower ends of the opposite surfaces of the first connecting block and the second connecting block.

[0013] Preferably, a fixed plate is installed on the outer side of the movable rod, and the fixed plate has multiple sets of threaded holes, with limiting bolts for limiting the position installed in the threaded holes.

[0014] With the above structure, this utility model has the following advantages:

[0015] This invention significantly improves the adjustability and adaptability of cable clamps by incorporating an adjustable movable rod and an adjusting clamp. The ball at the upper end of the movable rod engages with the grooves on the first and second connecting blocks, allowing the movable rod to flexibly adjust its angle. Combined with the fixing action of the fixed plate and the limiting bolt, it can meet the installation angle requirements in different construction scenarios. The spring inside the adjusting clamp can drive the upper clamping block to move up and down, thereby adapting to the clamping requirements of cables of different diameters. This eliminates the need to replace different models of cable clamps, reducing construction costs and improving construction efficiency.

[0016] This invention effectively improves the stability of cable clamping and the protection of the cable by incorporating a guide block and a spring coil. The guide block, with its downward-curving structure, guides the cable during installation, preventing misalignment or wear. The spring coil, fitted around the guide block and the upper clamping block, acts as a limit to these components, preventing the upper clamping block from loosening during clamping and further enhancing the clamping force on the cable, ensuring its stability even under external vibrations.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an exploded view of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the adjusting clamp of this utility model.

[0022] As shown in the figure: 1. First connecting block; 2. Second connecting block; 3. Movable rod; 4. Upper fixed block; 5. Lower clamping block; 6. Adjusting clamp; 601. Movable groove; 602. Spring; 603. Upper clamping block; 604. Protrusion; 7. Guide block; 8. Spring ring; 9. Fixed plate; 10. Limiting bolt; 11. Ball; 12. Groove. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] The present invention will now be described in further detail in conjunction with the full text.

[0026] Combined with appendix Figures 1-3 A power cable clamp includes a first connecting block 1 and a second connecting block 2 connecting the first connecting block 1. Both the first connecting block 1 and the second connecting block 2 are made of ZL102 aluminum alloy die-casting, with a tensile strength ≥320MPa. The weight is reduced by 30% compared to traditional cast iron clamps, and the corrosion resistance is better. The positioning of the mating surface can be achieved by the cooperation of the boss and the positioning groove structure, which can achieve quick positioning and installation. It is fixed with M6×20 stainless steel bolts, and the bolt pre-tightening torque is controlled at 12-15N·m to ensure the connection strength is above 1500N, effectively preventing loosening under long-term stress. An adjustable movable rod 3 is installed at the lower end of the first connecting block 1 and the second connecting block 2. The movable rod 3 is made of φ12mm high-strength carbon steel with galvanized passivation treatment, and its salt spray corrosion resistance is more than 500 hours, which can adapt to harsh construction environments such as outdoor and humid environments. The movable rod 3 is used to drive the clamping structure below to adjust its position and angle.

[0027] Specifically, an upper fixing block 4 is installed on the outer side of the lower end of the movable rod 3. The upper fixing block 4 serves as an intermediate component connecting the movable rod 3 and the lower clamping block 5. The lower clamping block 5 is installed on its lower end by bolts. The bolt connection method facilitates the installation and replacement of the lower clamping block 5.

[0028] In specific implementation of this utility model, such as Figure 2 and Figure 3 As shown, an adjustable clamp 6 is installed at the lower end of the movable rod 3. The adjustable clamp 6 is used to clamp cables of different diameters. The adjustable clamp 6 includes a movable groove 601 opened inside the lower end of the movable rod 3. The movable groove 601 has an inner diameter of φ15mm and a depth of 25mm, providing sufficient adjustment space for the spring 602 and the upper clamping block 603. The spring 602 is installed in the movable groove 601. The spring 602 is made of 65Mn spring steel, quenched and tempered at medium temperature, with a wire diameter of φ2mm, an outer diameter of φ14mm, 8 effective turns, a free length of 40mm, an elastic deformation range of 0-20mm, and a working load of 50-200. N, with a fatigue life of over 100,000 cycles, it can stably adapt to cables with diameters of 10-30mm for a long time; an upper clamping block 603 is installed at the lower end of the spring 602 and below the upper fixing block 4. The upper clamping block 603 is injection molded from ABS engineering plastic, with an arc-shaped clamping surface and an arc radius suitable for 10-30mm cables. A 3mm thick silicone rubber buffer layer is pasted on the surface, with a Shore hardness of 60HA and a static friction coefficient of 0.45, which can enhance the friction with the cable and avoid damage to the insulation layer. Both ends of the upper clamping block 603 are integrally formed with a 5mm high protrusion 604 to limit the axial displacement of the spring coil 8 and prevent it from falling off.

[0029] Specifically, guide blocks 7 for cable guidance and extension are installed at both ends of the lower clamping block 5. The guide blocks 7 have a downward bending structure. The downward bending structure can play a better guiding role during cable installation and avoid friction and wear between the cable and the edge of the component.

[0030] Specifically, a spring ring 8 for limiting is sleeved on the outer side of the guide block 7 and the upper clamping block 603. The spring ring 8 can further strengthen the clamping force of the upper clamping block 603 on the cable and prevent the upper clamping block 603 from loosening.

[0031] The upper end of the movable rod 3 has an integrally formed ball 11. The surface of the ball 11 is precision ground to a roughness of Ra0.8μm to ensure smooth rotation without jamming within the groove 12. The lower ends of the opposite surfaces of the first connecting block 1 and the second connecting block 2 are provided with hemispherical grooves 12 that cooperate with the ball 11. The surface roughness of the grooves 12 is Ra1.6μm, and they are in clearance fit with the ball 11. The clearance is controlled between 0.1-0.3mm to balance rotational flexibility and positioning stability, and angle adjustment can be achieved.

[0032] In specific implementation of this utility model, such as Figures 1-3 As shown, a fixed plate 9 is installed on the outer side of the movable rod 3. The fixed plate 9 has multiple sets of threaded holes arranged in an array around the axis of the movable rod 3. A limiting bolt 10 for limiting is installed in the threaded hole. When the movable rod 3 is adjusted to a suitable angle, the limiting bolt 10 is tightened so that the end of the limiting bolt 10 is in close contact with the lower end face of the first connecting block 1 and the second connecting block 2, thereby fixing the movable rod 3.

[0033] Working principle: When installing this cable clamp, firstly, the first connecting block 1 and the second connecting block 2 are quickly positioned by the positioning boss and positioning groove. The M6 ​​bolts are then tightened to 12-15 N·m using a torque wrench and fixed to the wall, cable tray, or other installation location. Installation time is ≤2 minutes. Then, according to the cable routing requirements, the movable rod 3 is rotated, and the ball 11 rotates within the groove 12 to the target angle (e.g., at a 45° cable tray corner). The four sets of M4 limit bolts on the fixing plate 9 are tightened. The rubber pads at the bolt ends fit tightly against the lower end face of the connecting block, generating a static friction force ≥80 N, achieving reliable angle fixing and precise angle adjustment with repeatable positioning. The clamping force reaches ±1°. Next, cables with diameters of 10-30mm are pushed in along the arc-shaped surface of guide block 7. The R15mm arc structure of guide block 7 allows the cable to smoothly enter the clamping position, avoiding surface scratches. The 65Mn spring 602 inside the adjustable clamp 6 automatically extends and retracts according to the cable diameter, generating a clamping force of 50-200N. This causes the upper clamping block 603 to cooperate with the lower clamping block 5 to firmly clamp the cable. The silicone rubber buffer layer ensures even distribution of the clamping force. Finally, a φ1.2mm stainless steel spring ring 8 is fitted onto the outside of guide block 7 and protrusion 604. The initial preload of 50N from the spring ring 8 further enhances clamping stability. Actual measurements show that when clamping cables with diameters of 10mm, 20mm, and 30mm, the clamping forces are 80N, 120N, and 180N respectively, all meeting the ≥50N clamping force requirement for power construction. After 24 hours of continuous testing under a 5-10Hz vibration environment, the cable remained stable, and the clamping force attenuation rate was only 5%.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A cable clamp for power applications, characterized in that, It includes a first connecting block (1) and a second connecting block (2) connecting the first connecting block (1), and an adjustable movable rod (3) is installed at the lower end of the first connecting block (1) and the second connecting block (2); An upper fixing block (4) is installed on the outer side of the lower end of the movable rod (3), and a lower clamping block (5) is installed on the lower end of the upper fixing block (4) by bolts. An adjustable clamp (6) is installed at the lower end of the movable rod (3).

2. The cable clamp for power applications according to claim 1, characterized in that: The adjusting clamp (6) includes an movable groove (601) inside the lower end of the movable rod (3), a spring (602) is installed in the movable groove (601), an upper clamping block (603) is installed at the lower end of the spring (602) and below the upper fixed block (4), and protrusions (604) are installed at both ends of the upper clamping block (603).

3. The cable clamp for power applications according to claim 1, characterized in that: The lower clamp (5) is equipped with guide blocks (7) at both ends for cable guiding and extension.

4. The cable clamp for power applications according to claim 3, characterized in that: The guide block (7) and the upper clamping block (603) are fitted with spring rings (8) for limiting the position.

5. A cable clamp for power applications according to claim 4, characterized in that: The guide block (7) has a downward bending structure.

6. The cable clamp for power applications according to claim 1, characterized in that: The upper end of the movable rod (3) is equipped with a ball (11), and the lower ends of the opposite surfaces of the first connecting block (1) and the second connecting block (2) are provided with grooves (12) for use with the ball (11).

7. The cable clamp for power applications according to claim 1, characterized in that: A fixed plate (9) is installed on the outside of the movable rod (3). The fixed plate (9) has multiple sets of threaded holes, and a limiting bolt (10) for limiting is installed in the threaded hole.

8. The cable clamp for power applications according to claim 1, characterized in that: The first connecting block (1) and the second connecting block (2) are fixedly connected by bolts.

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