A suspension clamp with self-adapting rotation mechanism

Abstract

This invention belongs to the field of power wiring technology and provides a suspension clamp with an adaptive rotation mechanism, comprising two clamp bodies; a circular hole is opened at the top of each clamp body; a shaft is coaxially inserted into the corresponding circular hole of each clamp body; sliders are respectively provided at the corners on both sides of each clamp body; clamping plates are respectively provided between the two clamp bodies, corresponding to the inner side of each slider; a rotating shaft is fixedly connected to the middle of the outer side of each clamping plate, and an adjusting block is fixedly connected to the rotating shaft. Under normal conditions, the clamping plates hold and fix the cable by the cooperation of the screw and nut to prevent its axial movement; when the cable is subjected to external forces such as wind or ice and sways or twists, it can drive the clamping plates to deflect, causing the adjusting block to move along the spiral slide, driving the clamping plates to axially close and adaptively increase the clamping force to prevent the cable from moving; after the external force is eliminated, the cable returns to its original position, the clamping plates retract, and the anti-slip rubber parts rely on elasticity to restore their original shape, preventing plastic deformation caused by long-term pressure.

Description

Technical Field

[0001] This invention relates to the field of power wiring technology, and specifically to a suspension clamp for cable installation, which is a suspension clamp with an adaptive rotation mechanism. Background Technology

[0002] Suspension clamps are core load-bearing hardware in overhead power transmission lines. They are mainly used to suspend and fix conductors or lightning protection wires to the lower end of insulator strings, bearing the vertical weight of the conductors, wind loads, and icing loads. They also inhibit conductor slippage and mitigate fatigue damage caused by light wind vibrations. Their performance directly determines the operational safety and life-cycle maintenance costs of the transmission line. According to GB / T2314 "General Technical Conditions for Power Fittings" and DL / T756 "Suspension Clamps" standards, the design service life of line load-bearing hardware should not be less than 40 years, and it must maintain stable gripping force and reliable conductor protection capabilities throughout its service life.

[0003] Currently, the mainstream suspension clamps on the market are mainly divided into two types: bolt-pressed and pre-stretched. Among them, bolt-pressed clamps are the most widely used in medium and low voltage transmission lines in China due to their advantages of low cost and convenient installation. The core structure is an arched hull with a pressure plate, which clamps the conductor through the pre-tightening force of the bolts, supplemented by rubber pads to increase the friction coefficient and protect the surface of the conductor. Pre-stretched clamps fix the conductor through a pre-stretched wire spiral clamping structure, which has better fatigue resistance, but the procurement and installation costs are higher, limiting its large-scale application in conventional lines.

[0004] However, the most widely used bolt-pressed suspension clamps have unavoidable technical defects: the rubber pads of bolt-pressed clamps are prone to permanent plastic deformation under long-term pressure, which leads to rapid decay of bolt preload and reduced clamping surface fit, thereby causing safety hazards such as conductor slippage (axial movement), wear and breakage; at the same time, traditional fixed clamping structures are difficult to adapt to the sway and torsion caused by cable wind swing, which easily leads to stress concentration and accelerates conductor fatigue damage. Summary of the Invention

[0005] The purpose of this invention is to provide a suspension clamp with an adaptive rotation mechanism, which solves the technical problems in the prior art where the rubber pad of the bolt-tightening clamp is prone to permanent plastic deformation due to long-term pressure, resulting in a decrease in bolt preload and a decrease in the clamping surface fit, which in turn causes axial movement of the conductor, wear and breakage of strands. Furthermore, the traditional fixed clamping structure is difficult to adapt to the sway and torsion caused by cable wind swing, which easily leads to stress concentration and accelerated fatigue damage of the conductor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A suspension clamp with an adaptive rotation mechanism includes two clamp bodies; a circular hole is provided on the top of each clamp body; and a shaft is coaxially inserted into the corresponding circular holes of the two clamp bodies. The two corners of the wire clamp body are respectively provided with sliders; between the two wire clamp bodies, corresponding to the inner side of each slider, a clamping plate is respectively provided; a rotating shaft is fixedly connected to the middle of the outer side of each clamping plate, and an adjusting block is fixedly connected to the rotating shaft; a spiral slide is opened inside the slider, and the adjusting block slides in cooperation with the spiral slide; anti-slip rubber parts are attached to the inner wall of each clamping plate. Each clamp plate has a fixed lug that is symmetrically arranged at both ends. A screw rod passes through the corresponding fixed lug of the two clamp plates. The screw rod and nut are threaded together to fix the relative position between the two clamp plates.

[0007] The above technical solution further includes: The outer end of the shaft is also fitted with a cotter pin to prevent the nut from loosening.

[0008] The shaft is fitted with a bearing in the middle; a limiting sleeve is fitted on the shaft on both sides corresponding to the bearing, and the two ends of the limiting sleeve abut against the side wall of the clamp body and the side wall of the bearing, respectively.

[0009] The main body of the wire clamp has horizontally extending grooves at both corners, and the slider slides into the corresponding grooves.

[0010] The clamping plate has multiple through grooves on both sides of the rotating shaft; the anti-slip rubber part has radial protrusions at the positions of the through grooves.

[0011] The shaft has a ridge formed on it, and the two clamp bodies are arranged axially spaced apart by the ridge. The outer end of the shaft has an external thread, and the two clamp bodies are axially fixed in relative position by means of a nut threaded into the external thread.

[0012] A fixing protrusion is integrally fixed to the middle position of the bottom of the clamp body, and a through round hole is opened on the fixing protrusion.

[0013] How to use the suspension clamp: First, select two clamp bodies and two shafts. Insert the two clamp bodies symmetrically at both ends of the two shafts. Place the power cable between the corresponding clamp plates simultaneously. Then, screw the nuts on both ends of the shafts to fix the relative position between the two clamp bodies. After that, use the screw and nut to bring the two clamp plates on the same side closer to each other, so that the anti-slip rubber parts can clamp and secure the cable.

[0014] When the cable is subjected to tensile force, the portion of the cable outside the two sides of the clamp body tends to sag or sag to the side. The cable will cause the clamp plate to deflect around the slider, causing the shaft to rotate inside the slider and the adjusting block to move inside the spiral slide. This forces the shaft to move axially towards the cable, causing the two opposing clamp plates to move closer to each other again, thereby applying a greater adaptive clamping force to the cable.

[0015] The beneficial effects of this invention are: 1. Under normal conditions, the present invention uses a screw and nut to clamp and fix the cable, preventing it from moving axially. When the cable is subjected to external forces such as wind or ice, causing it to sway or twist, the clamp can be deflected, causing the adjusting block to move along the spiral slide, driving the clamp to move axially closer and adaptively increasing the clamping force to prevent the cable from moving. After the external force is eliminated, the cable is reset, the clamp retracts, and the anti-slip rubber parts return to their original shape due to elasticity, preventing plastic deformation caused by long-term pressure.

[0016] 2. By sliding the slider inside the groove, the present invention allows the cable to move axially on the clamp body, which reduces the tensile force and stress damage to the middle part of the cable when it sags at a larger angle, thus protecting the cable.

[0017] 3. Because the suspension clamp of this invention does not have easily damaged elastic mechanisms such as springs, but uses a spiral slide and adjustment block to achieve self-adaptive clamping of the cable by the clamp plate, its service life can meet the long-term use standards of national and industry standards, and it will not be easily damaged once installed.

[0018] 4. By placing the cable between two shafts, this invention adds an anti-detachment protection to the cable, ensuring that the power cable can still be suspended and fixed even after the clamping plate loses its clamping effect, thus ensuring high safety in use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the clamping plate structure in this invention; Figure 3 This is a cross-sectional view of the slider structure in this invention; Figure 4 This is a cross-sectional view of the spiral slide and adjusting block structure in this invention; Figure 5 This is an exploded view of the anti-slip rubber component in this invention; Figure 6 This is an exploded view of the shaft structure in this invention.

[0020] In the diagram: 1. Cable clamp body; 2. Slide groove; 3. Slider; 4. Clamping plate; 5. Rotating shaft; 6. Spiral slide; 7. Adjusting block; 8. Anti-slip rubber part; 9. Through groove; 10. Radial protrusion; 11. Fixing ear; 12. Screw; 13. Shaft; 14. Shaft ridge; 15. External thread; 16. Cotter pin; 17. Bearing; 18. Limiting sleeve; 19. Fixing protrusion; 20. Round hole. Detailed Implementation

[0021] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1 , Figure 2 as well as Figure 3 As shown, a suspension clamp with an adaptive rotation mechanism includes two clamp bodies 1, each clamp body 1 being triangular in shape; a fixing protrusion 19 is integrally fixed to the middle position of the bottom of each clamp body 1, and through circular holes 20 are provided on the top and bottom fixing protrusions 19 of each clamp body 1.

[0023] Please see Figure 1 and Figure 6 As shown, a shaft 13 is coaxially inserted into the corresponding circular holes 20 of the two wire clamp bodies 1. A shaft ridge 14 is formed on the shaft 13. The two wire clamp bodies 1 are arranged axially at a distance through the shaft ridge 14. An external thread 15 is provided at the outer end of the shaft 13. The two wire clamp bodies 1 are axially fixed in relative position by the screw engagement of the nut with the external thread 15.

[0024] Furthermore, the outer end of the shaft 13 is also fitted with a cotter pin 16, which is used to prevent the nut from loosening.

[0025] Furthermore, a bearing 17 is fitted in the middle of the shaft 13. The bearing 17 is used to connect to the lower end of the insulator string to reduce the wear of the clamp body 1 when it swings and rotates under the action of external forces such as wind load, and to ensure its performance. In order to prevent the bearing 17 from moving axially, a limiting sleeve 18 is respectively fitted on the shaft 13 on both sides corresponding to the bearing 17. The two ends of the limiting sleeve 18 abut against the side wall of the clamp body 1 and the side wall of the bearing 17, respectively, to achieve axial limiting of the bearing 17.

[0026] Please refer to it again. Figure 1 , Figure 3 , Figure 4 as well as Figure 5As shown, horizontally extending grooves 2 are respectively provided at the two corners of the wire clamp body 1, and sliders 3 are slidably engaged in each groove 2; clamping plates 4 are respectively provided between the two wire clamp bodies 1, corresponding to the inner side of each slider 3, and the two clamping plates 4 are arranged symmetrically; a rotating shaft 5 is fixedly connected to the middle of the outer side of each clamping plate 4, and an adjusting block 7 is fixedly connected to the rotating shaft 5; a spiral slide 6 is provided inside the slider 3, and the adjusting block 7 is slidably engaged with the spiral slide 6.

[0027] Please refer to it again. Figure 5 As shown, each clamping plate 4 has an anti-slip rubber component 8 attached to its inner wall. In use, the cable is clamped between the two clamping plates 4 and is tightly attached to the anti-slip rubber component 8.

[0028] Please refer to it again. Figure 5 As shown, each clamping plate 4 has a fixed lug 11 that is symmetrically arranged at both ends. A screw 12 is inserted between the corresponding fixed lugs 11 of the two clamping plates 4. The screw 12 is threaded with a nut to fix the relative position between the two clamping plates 4.

[0029] Please refer to it again. Figure 4 and Figure 5 As shown, further, the clamping plate 4 has multiple through grooves 9 on both sides corresponding to the rotating shaft 5; the anti-slip rubber part 8 has radial protrusions 10 at the positions corresponding to the through grooves 9, which are used to prevent the anti-slip rubber part 8 from axially moving when subjected to cable pulling, so as to maintain the clamping force of the clamping plate 4.

[0030] Based on the above-described suspension clamp with an adaptive rotation mechanism for power wiring, the following usage methods apply during power wiring: First, select two clamp bodies 1 and two shafts 13. Insert the two clamp bodies 1 symmetrically at both ends of the two shafts 13. Simultaneously place the power cables between the corresponding clamp plates 4. Then, screw the nuts onto both ends of the shafts 13 to fix the relative positions of the two clamp bodies 1. After that, use the screw 12 in conjunction with the nuts to bring the two clamp plates 4 on the same side closer to each other, so that the cables are clamped and secured by the anti-slip rubber parts 8.

[0031] In this embodiment, when the cable is not affected by external wind, ice, or other factors, the tensile force on the cable is low. The clamping force applied by the clamping plate 4 through the screw 12 and nut is sufficient to prevent axial movement of the cable and maintain its fixed position. However, when the cable is affected by external factors, the portion of the cable outside the sides of the clamp body 1 tends to sag or sag laterally (i.e., the cable forms a larger arch with the clamp body 1 at its highest point). At this time, the cable will cause the clamping plate 4 to deflect around the slider 3 to accommodate the swaying and twisting caused by wind. When the clamping plate 4 rotates, the rotating shaft 5 rotates within the slider 3, and the adjusting block 7 moves within the spiral slide 6. This forces the rotating shaft 5 to move axially towards the cable, causing the two opposing clamping plates 4 to move closer together again, thereby applying a greater adaptive clamping force to the cable and preventing axial movement of the cable when affected by external factors. When the external tension on the cable disappears, the cable gradually returns to its original position and tends to be straight (still arched, but the angle becomes smaller). The shaft 5 rotates and moves axially away from the cable. The anti-slip rubber part 8 also returns to its original position by its own elastic deformation, avoiding permanent plastic deformation caused by long-term pressure and loss of clamping effect.

[0032] In this embodiment, since the suspension clamp is not equipped with easily damaged elastic mechanisms such as springs, but uses a spiral slide 6 in conjunction with an adjusting block 7 to achieve adaptive clamping of the cable by the clamp plate 4, its service life can meet the long-term use standards of national and industry standards, and it will not be easily damaged once the installation is completed.

[0033] In this embodiment, by placing the cable between the two shafts 13, an additional layer of protection against detachment can be added to the cable, so that even after the clamping plate 4 loses its clamping effect, the cable can still be suspended and fixed, which ensures high safety in use.

[0034] In this embodiment, when the cable is deflected at an angle by external force, its middle part will inevitably bend. Since the cable is clamped by the clamp 4, it is not allowed to move axially. Therefore, the middle part of the cable will be damaged by tensile force and stress. The present invention allows the cable to move axially on the clamp body 1 by sliding the slider 3 inside the groove 2. This enables the middle part of the cable to be less damaged by tensile force and stress when it droops at a larger angle, thus protecting the cable.

[0035] In this embodiment, adding a cover or other dustproof and moisture-proof component to the slot 2 or other locations with pores is a simple and readily available conventional method, which will not be elaborated on here.

[0036] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A suspension clamp with an adaptive rotation mechanism, characterized in that, It includes two wire clamp bodies (1); the top of each wire clamp body (1) has a round hole (20); and a shaft (13) is coaxially inserted into the corresponding round hole (20) of each of the two wire clamp bodies (1). The two corners of the wire clamp body (1) are respectively provided with sliders (3); between the two wire clamp bodies (1) and corresponding to the inner side of each slider (3) are respectively provided with clamps (4); a rotating shaft (5) is fixedly connected to the middle of the outer side of each clamp (4), and an adjusting block (7) is fixedly connected to the rotating shaft (5); a spiral slide (6) is opened inside the slider (3), and the adjusting block (7) slides with the spiral slide (6); an anti-slip rubber part (8) is attached to the inner wall of each clamp (4). Each clamping plate (4) has a fixed lug (11) arranged symmetrically at both ends. A screw (12) is inserted between the corresponding fixed lugs (11) of the two clamping plates (4). The screw (12) and the nut are threaded together to fix the relative position between the two clamping plates (4).

2. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, The outer end of the shaft (13) is also fitted with a cotter pin (16) to prevent the nut from loosening.

3. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, The shaft (13) is fitted with a bearing (17) in the middle; a limiting sleeve (18) is fitted on the shaft (13) on both sides corresponding to the bearing (17), and the two ends of the limiting sleeve (18) abut against the side wall of the clamp body (1) and the side wall of the bearing (17) respectively.

4. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, The main body (1) of the wire clamp has horizontally extending grooves (2) at both corners, and the slider (3) slides in the corresponding grooves (2).

5. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, The clamping plate (4) has multiple through grooves (9) on both sides of the rotating shaft (5); the anti-slip rubber part (8) has radial protrusions (10) at the positions corresponding to the through grooves (9).

6. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, The shaft (13) has a ridge (14) formed on it, and the two wire clamp bodies (1) are arranged axially spaced through the ridge (14); the outer end of the shaft (13) is provided with an external thread (15), and the two wire clamp bodies (1) are threaded together with the external thread (15) through a nut to achieve axial fixation of their relative positions.

7. A suspension clamp with an adaptive rotation mechanism according to claim 1 or 6, characterized in that, The main body of the clamp (1) has a fixed protrusion (19) integrally fixed at the middle position of the bottom, and a through round hole (20) is opened on the fixed protrusion (19).

8. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, Including the following instructions for using suspension clamps: First, select two clamp bodies (1) and two shafts (13). Insert the two clamp bodies (1) symmetrically at both ends of the two shafts (13). Simultaneously place the power cable between the corresponding clamp plates (4). Then, screw the nuts onto both ends of the shafts (13) to fix the relative position between the two clamp bodies (1). Then, use the screw (12) and the nut to bring the two clamp plates (4) on the same side closer to each other, so that the cable is clamped and secured by the anti-slip rubber parts (8).

9. A suspension clamp with an adaptive rotation mechanism according to claim 1, characterized in that, When the cable is subjected to tensile force, the portion of the cable outside the two sides of the clamp body (1) tends to droop or sag to the side. The cable will cause the clamp plate (4) to deflect around the slider (3) as the center, causing the rotating shaft (5) to rotate inside the slider (3) and causing the adjusting block (7) to move inside the spiral slide (6), thereby forcing the rotating shaft (5) to move axially towards the cable direction, causing the two opposing clamp plates (4) to move closer to each other again, thereby applying a greater adaptive clamping force to the cable.

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