A pre-assembled suspension clamp and method of assembly thereof

Abstract

The application discloses a pre-stranded suspension clamp and an assembling method thereof, and belongs to the technical field of electric power fittings. The suspension clamp comprises inner stranded wires, outer stranded wires, a combined rubber clamp, an inner wire clamping ring, a wire clamp, an outer wire clamping ring, a pressing ring and a hanging ring. The combined rubber clamp is composed of two half-pipe type combined skeletons and rubber sleeves sleeved on both ends of the combined skeletons. The inner wire clamping ring is sleeved on the middle part of the combined skeleton and is used for restraining the skeleton and accurately guiding the outer stranded wires to be uniformly distributed and closely attached to the rubber sleeves. The wire clamp is provided with the outer wire clamping ring with a wire clamping groove at both ends, the pressing ring is matched with the limiting groove of the outer wire clamping ring through a limiting column, and the rotating range of the pressing ring is limited. Through the cooperative positioning of the inner and outer wire clamping rings, the application ensures that all the outer stranded wires are uniformly distributed and closely attached to the rubber clamp in the stranding process, and stress concentration is effectively avoided. In addition, the modular combined structure enables the damaged parts such as the rubber sleeve to be quickly replaced individually, greatly facilitates the installation and maintenance, and significantly improves the service life of the suspension clamp and the line operation safety.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, and more specifically, to a pre-stretched suspension clamp and its assembly method, used for suspending and supporting cables in overhead transmission lines. Background Technology

[0002] Prestressed suspension clamps are indispensable hardware in overhead transmission lines, used to suspend conductors or ground wires from straight-line towers, bearing the vertical loads and dynamic loads such as wind vibration. A typical structure includes inner stranded wires, outer stranded wires, and a rubber clamp between them. During installation, the inner stranded wires are directly wound around the outer surface of the cable, while the outer stranded wires are wound around the outside of the inner stranded wires. The entire assembly is then connected to the hanging ring via a clamp, and finally fixed to the tower.

[0003] In practical engineering applications, the fit between the twisted wires and the rubber clamps requires extremely high precision. The rubber clamps are typically designed with a figure-eight or trumpet-shaped structure with a specific curvature to conform to the cable and form a stress-absorbing layer. The key requirement is that all the twisted wires must be evenly distributed and tightly fitted to the outer surface of the rubber clamp. (See appendix for details.) Figure 8 (The diagram shown illustrates the installation of the outer stranded wires and rubber clamps). This is because the outer stranded wires are the core load-bearing component for transmitting the suspended load of the cable. If the distribution is uneven or there are gaps, some strands will bear excessive stress, resulting in stress concentration. Under long-term operation, this can easily lead to fatigue breakage, seriously threatening the safe operation of the transmission line. At the same time, the shape accuracy of the rubber clamp itself and its fit with the inner and outer stranded wires directly affect the gripping force and anti-corona performance of the suspension clamp.

[0004] However, existing pre-twisted suspension clamps have significant drawbacks. First, most products have a one-piece rubber clamp structure. When twisting the outer strands, operators cannot ensure that each strand is precisely and evenly embedded in the pre-set grooves on the clamp surface or completely conforms to its curves, especially when installing large-diameter or long cables, where uneven distribution is more pronounced. Second, once the existing fittings are installed, if the rubber clamp ages or is damaged, or if cable replacement is needed due to line modifications, the replacement process is extremely difficult. It usually requires cutting or forcibly removing the outer strands and damaging the clamps, which is not only complex and inefficient but also damages the cable and remaining intact components, leading to high maintenance costs. Therefore, there is an urgent need for a pre-twisted suspension clamp that can ensure uniform fit of the outer strands and is easy to install and replace. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned problems existing in the prior art and provide a pre-twisted suspension clamp and its assembly method.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A pre-twisted suspension clamp includes inner strands, outer strands, a combined rubber clamp, an inner clamping ring, a wire clamp, an outer clamping ring, a pressure ring, and a hanging ring. The inner strands are directly twisted around the outside of the cable, and the outer strands are twisted around the outside of the inner strands. The combined rubber clamp is shaped like an "8" and is located between the inner and outer strands to withstand and buffer pressure.

[0007] The modular rubber clamp is one of the core improvements of this invention. It comprises two modular frames hinged together (or connected by a snap-fit ​​structure), and rubber sleeves fitted onto both ends of each modular frame. Each modular frame is semi-tubular, and the two frames snap together to form a complete tubular frame. A limiting ring is provided in the inner circle of the frame's middle section, and an arc-shaped convex ring is provided at the end. The rubber sleeves have grooves for the frame. During assembly, the rubber sleeves are fitted onto the ends of the frame; the limiting ring prevents over-insertion, while the arc-shaped convex ring guides and prevents slippage, achieving a stable connection that is "easy to insert but difficult to remove." The two rubber sleeves, when matched, form a flared opening facing outwards to accommodate the bending and stress direction of the cable.

[0008] The inner retaining ring is made of rubber, with multiple retaining grooves on its outer ring matching the number and diameter of the outer strands. The inner retaining ring has a notch to allow it to be opened and fitted into the center of the assembled frame after fastening. Its functions are twofold: first, to externally constrain the two fastened assembled frames, preventing them from loosening; and second, to provide precise positioning for the winding of the outer strands, ensuring that each outer strand is guided to the correct circumferential position and fits snugly against the rubber sleeve surface.

[0009] The wire clamp consists of two semi-circular clamps, with the lower end hinged and the upper end connected to the hanging ring via bolts and a lifting eye.

[0010] The outer clamping ring is made of two rubber half-rings spliced ​​together. The clamping sleeve is located at both ends of the axial direction of the clamp, and there are also clamping grooves on it for further clamping the outer stranded wire at the end of the clamp.

[0011] The pressure ring has a C-shaped structure, with its lower end connected to the hinge at the lower end of the wire clamp via a screw. A limiting post is located on the inner side of the pressure ring, which slides into the limiting groove on the outer side of the outer clamping ring. This structure allows the outer clamping ring to rotate axially within a certain range to release stress when the outer stranded wire is subjected to slight torsion. Simultaneously, the limiting action of the limiting post and the limiting groove prevents excessive rotation that could lead to structural instability.

[0012] The present invention also provides an assembly method based on the above structure, the specific steps of which include: combining the skeleton with a rubber sleeve → fastening the combined skeleton and covering the inner stranded wire → installing the inner wire clamping ring → winding the outer stranded wire and clamping it into the inner wire clamping ring groove → installing the wire clamp → installing the outer wire clamping ring → installing the pressure ring and tightening it → connecting the hanging ring. Beneficial effects

[0013] Compared with the prior art, the present invention has the following significant advantages: To ensure uniform distribution and tight fit of the outer strands and eliminate stress concentration: This invention utilizes precisely designed grooves on the inner clamping ring to forcibly guide and position the outer strands during winding, ensuring that each strand is accurately aligned on the predetermined curved surface of the rubber sleeve, avoiding the randomness and unevenness of manual winding. Simultaneously, the outer clamping ring further straightens and secures the outer strands at both ends of the clamp. This dual positioning ensures a tight fit between the outer strands and the rubber clamp throughout their entire length, fundamentally solving the stress concentration problem caused by uneven distribution and significantly improving the cable's fatigue life and operational safety.

[0014] Modular structure for easy installation and replacement: The modular rubber clamp features a detachable modular frame and independent rubber sleeve. As a consumable part, the rubber sleeve can be easily removed from the modular frame for replacement after wear or aging, without replacing the entire frame. The notched design of the inner clamping ring allows for flexible opening and closing, facilitating assembly and disassembly. When cable replacement or repair is required, the process can be reversed: loosen the pressure ring and outer clamping ring, open the clamp, remove the inner clamping ring, and open the modular frame to expose the internal stranded wires and cable. The entire process does not damage any stranded wires, greatly reducing maintenance difficulty and cost.

[0015] Optimized stress buffering and release mechanism: The "easy-to-insert, hard-to-remove" structure of the rubber sleeve and composite skeleton ensures that the rubber sleeve will not loosen during long-term use. More importantly, the sliding fit between the outer clamping ring and the pressure ring, formed by the limiting post and limiting groove, allows the outer clamping ring to rotate within a small range along the clamping axis when the outer stranded wire undergoes elastic torsion due to dynamic loads (such as wind vibration or galloping). This controlled micro-motion mechanism effectively releases the torsional stress inside the stranded wire, avoids stress accumulation, and at the same time prevents excessive torsion through limiting, achieving a balance between buffering and constraint.

[0016] Improving assembly accuracy and efficiency: The inner clamping ring is not only a positioning tool but also a structural component. It transforms the technical requirement of "evenly arranging the outer strands" into a simple operation of "placing the strands into the clamping slot," significantly reducing installation difficulty and reliance on operator experience, and ensuring consistency and reliability in batch installations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is the front view of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 4 A three-dimensional structural cross-section of the present invention. Figure 1 ; Figure 5 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ; Figure 6 A three-dimensional structural cross-section of the present invention. Figure 2 ; Figure 7 This is an exploded view of the present invention; Figure 8 This is a schematic diagram of the installation of the external twisted wire and the rubber clamp.

[0018] The numbers in the diagram are as follows: 1-Inner twisted wire; 2-Outer twisted wire; 3-Combined rubber clip; 31-Combined skeleton; 311-Arc-shaped convex ring; 312-Limiting ring; 313-Clip tooth; 314-Clip groove; 32-Rubber sleeve; 321-Skeleton groove; 4-Inner wire clamping ring; 41-Wire clamping groove; 42-Gap; 5-Wire clamp; 51-Wrapping clamp; 52-Bolt; 53-Lifting eye; 6-Outer wire clamping ring; 61-Half ring; 62-Limiting groove; 7-Pressure ring; 71-Limiting post; 72-Screw; 8-Hanging ring; 9-Cable. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] The following will refer to the appendices in the embodiments of the present invention. Figures 1 to 7 (Using symbolic description instead) The technical solution of the present invention will be clearly and completely described. This embodiment is illustrated using a typical 220kV transmission line prestressed suspension clamp as an example, but the application scope of the present invention is not limited to this voltage level, and can also be applied to overhead lines or optical cable installations of other voltage levels.

[0021] I. Preparations and Component Pretreatment First, based on the material (e.g., aluminum-clad steel stranded wire or aluminum alloy stranded wire), diameter (26.1mm in this embodiment), and rated working load (e.g., 30kN) of the cable 9 to be installed, select the appropriate specifications of inner stranded wire 1, outer stranded wire 2, combined rubber clamp 3, inner wire clamping ring 4, wire clamp 5, outer wire clamping ring 6, pressure ring 7, and hanging ring 8 from the complete set of hardware. Ensure that all hardware surfaces are smooth and burr-free, the spiral direction of the inner stranded wire 1 and outer stranded wire 2 is consistent with the twisting direction of the outer layer of the cable 9 (usually right-handed), and all rubber components (rubber sleeve 32, inner wire clamping ring 4, outer wire clamping ring 6) are free from aging, cracks, or deformation. Clean the oil, dust, and oxide layer from the installation surface of the cable 9, and evenly apply a layer of conductive paste to reduce contact resistance and prevent fretting corrosion.

[0022] II. Installation of internal twisted wire Following the standard installation process for pre-twisted hardware, starting from the marked point on the cable 9, twist multiple (12 in this embodiment) inner strands 1 one by one tightly and parallelly onto the outer surface of the cable 9 with uniform tension. During the twisting process, ensure that the pitch of each inner strand 1 is consistent and that they are tightly arranged side by side, with a smooth transition at both ends, without any warping or overlap. After the inner strands 1 are fully installed, they should form a uniform "armor layer" that is tightly attached to the surface of the cable 9, used to distribute the gripping force of the suspension clamp and protect the cable 9.

[0023] III. Assembly of the modular rubber clamp (one of the core steps) This step aims to create a detachable, easy-to-insert, difficult-to-remove buffer structure.

[0024] Pre-assembly of the rubber sleeve and the composite skeleton: Take a composite skeleton 31, which is a semi-tubular injection molded part made of high-strength engineering plastic (such as polyamide 66). At one end, align the skeleton groove 321 of the rubber sleeve 32 with the end of the composite skeleton 31 and insert it with uniform force along the axial direction. During insertion, the arc-shaped protrusion 311 designed at the end of the composite skeleton 31 first makes interference contact with the entrance of the skeleton groove 321. At this time, the rubber sleeve 32 undergoes elastic deformation, and the entrance expands slightly to allow the arc-shaped protrusion 311 to pass through—this is the characteristic of the "easy insertion" stage, and the insertion force is about 15-20N. Continue pushing until the end face of the rubber sleeve 32 contacts the limiting ring 312 in the middle of the composite skeleton 31. At this time, a slight "click" is heard, indicating that it is fully in place. At this time, the arc-shaped protrusion 311 has completely entered the annular recess at the end of the skeleton groove 321. The elastic retraction of the rubber sleeve 32 causes the recess and the arc-shaped protrusion 311 to form a reverse locking. If attempting to pull it out in the opposite direction, it is necessary to overcome the wedging force between the rubber material and the arc-shaped convex ring 311, as well as the secondary deformation resistance at the inlet of the rubber sleeve 32. The pull-out force is approximately 3-5 times the insertion force (i.e., 60-100N), thus achieving a "difficult to pull out" anti-detachment effect. The other composite frame 31 and its rubber sleeves 32 at both ends are treated in the same manner. At this point, two symmetrical semi-tubular assemblies with rubber sleeves 32 are obtained.

[0025] IV. Assembly of the skeleton and installation of the inner clamping ring (the second core step) Frame Closure: The two pre-assembled semi-tubular assemblies are closed from both sides of the cable 9, completely enclosing the cable 9 with the inner strand 1 already installed. The axial position is adjusted so that the center of the combined rubber clamp 3 is aligned with the middle section of the inner strand 1. Then, the fastening teeth 313 and fastening grooves 314 in the middle of the two combined frame 31 are aligned and pressed firmly until a "click" is heard, confirming that they are securely fastened, forming a complete tubular frame surrounding the cable 9. At this point, the rubber sleeves 32 at both ends of the two combined frame 31 are matched in pairs, together forming an outwardly expanding horn-shaped structure with a taper of 15°-20°. This horn opening faces the axial extension direction of the cable 9, used to smoothly support the bending transition of the outer strand 2, avoiding stress concentration points during bending.

[0026] Installation of the inner wire retaining ring: Remove the inner wire retaining ring 4 (made of aging-resistant EPDM rubber with a Shore A hardness of 70±5). Observe the multiple wire retaining grooves 41 (18 in this embodiment, equal to the number of outer strands 2) on its outer ring, and the radially penetrating notch 42. Hold both sides of the inner wire retaining ring 4 with both hands and pry it open outwards at the notch 42 like opening a bracelet, so that the notch 42 expands enough for the inner diameter of the inner wire retaining ring 4 to be larger than the outer diameter of the tubular skeleton. Insert the inner wire retaining ring 4 into the middle of the snap-fitted combined skeleton 31 from the side, and position it between the two limiting rings 312. Release both hands, and the inner wire retaining ring 4 will return to the closed state due to its own elastic memory, tightly hugging the outside of the combined skeleton 31, with its inner surface forming a circumferential constraint with the outer flange of the combined skeleton 31. This constraint serves two purposes: first, it mechanically prevents the buckle 313 from accidentally loosening from the buckle groove 314 during long-term vibration; second, it provides a precise circumferential positioning reference for the subsequent winding of the outer strand 2. At this time, the wire-locking grooves 41 on the inner wire-locking ring 4 are evenly distributed on the circumference, and the axial direction of each wire-locking groove 41 is basically consistent with the theoretical helix angle of the outer strand 2 (usually 40°-50°).

[0027] V. External Wire Winding and Precise Positioning (Third Core Step) Begin winding the outer strands 2. Take the first outer strand 2 and begin winding it along the designed spiral direction (same as the inner strand 1) against the outer curved surface of the rubber sleeve 32. When the outer strand 2 passes the position of the inner clamping ring 4, press it firmly into the corresponding first clamping groove 41, ensuring that the outer strand 2 is completely submerged in the groove, thus forcing it to adhere tightly to the rubber sleeve 32. Then wind the second outer strand 2 and press it into the second clamping groove 41, and so on, until all 18 outer strands 2 are wound and positioned through the clamping grooves 41 of the inner clamping ring 4. The core technical effect of this step is that the inner clamping ring 4 acts as a "forced arranger," which completely eliminates the defects of uneven spacing, local bulges, or gaps in the outer strands 2 caused by human judgment and uneven force in traditional manual winding, ensuring that all outer strands 2 are absolutely evenly distributed in the middle section of the combined rubber clamp 3 and achieve 100% surface contact with the curved surface of the rubber sleeve 32.

[0028] VI. Installation of the clamp Bring the two semi-circular clamps 51 (made of hot-dip galvanized steel or aluminum alloy) of the cable clamp 5 together from the top and bottom sides of the cable 9, so that they completely cover the combined rubber clamp 3 and the section of the outer twisted wire 2 that has been positioned by the inner clamping ring 4. Adjust the axial position of the clamps 51 so that both ends are exactly at the preset design position (usually 5-10mm away from the flared end face of the rubber sleeve 32). Place the lifting ring 53 between the connecting ears at the upper ends of the two clamps 51, insert the high-strength bolt 52, and initially tighten it to the point that the clamps 51 can hold the component tightly but can still make slight axial adjustments under external force (torque approximately 30 N·m).

[0029] VII. Installation and Secondary Adjustment of External Wire Rings Take two outer clamping rings 6, each consisting of two interlocking half-rings 61. Interlock the two half-rings 61 of one outer clamping ring 6 from top to bottom onto one end of the clamp 51, aligning the inner clamping groove with the outer stranded wire 2 extending from the end of the clamp 51. Apply even pressure with your palm to completely close the two half-rings 61, then rotate the entire outer clamping ring 6. During rotation, the clamping groove acts like a thread wrench, pushing and straightening all the outer stranded wires 2 passing through it further radially inward, eliminating any slight looseness at the ends. This operation also adjusts the stress distribution of the outer stranded wires 2 to be more uniform. Install the other outer clamping ring 6 onto the other end of the clamp 51 using the exact same steps. After installation, use a torque wrench to fully tighten the bolt 52 at the upper end of the clamp 5 to the design torque (e.g., 80 N·m), ensuring the two clamps 51 securely clamp the internal components.

[0030] 8. Installation of the pressure ring and setting of the stress relief mechanism Pressure Ring Assembly: Take a C-shaped pressure ring 7 (made of aluminum alloy or stainless steel) with its opening facing downwards. Insert the pressure ring 7 horizontally onto the outside of the already installed outer clamping ring 6 from below. Adjust the circumferential position of the pressure ring 7 so that the multiple protruding limiting posts 71 on its inner side (three evenly distributed along the circumference in this embodiment) are accurately inserted into the pre-set limiting grooves 62 on the outer surface of the outer clamping ring 6. Each limiting groove 62 is designed as an arc-shaped groove extending 30° circumferentially along the outer clamping ring 6. Then, align the lower end of the pressure ring 7 with the threaded holes at the hinge points of the two clamping rings 51, and tighten them with stainless steel screws 72 to a torque of 15 N·m. Install the pressure ring 7 on the other side using the same method.

[0031] Dynamic stress relief mechanism explanation: After this structure is completed, the outer clamping ring 6 is not completely rigidly fixed. When the line encounters dynamic loads such as wind vibration, galloping, or ice shedding, the outer strands 2 will generate a slight axial torsion due to elastic deformation. This torsional force will be transmitted to the outer clamping ring 6, causing it to rotate along the axial direction of the clamp 51. Since the limiting post 71 can only slide within a 30° arc length defined by the limiting groove 62 of the outer clamping ring 6, the outer clamping ring 6 is allowed to rotate a maximum of ±15° relative to the pressure ring 7 and the clamp 51. This controlled micro-motion releases the torsional stress accumulated inside the outer strands 2, avoiding fatigue breakage caused by stress concentration. At the same time, the end of the limiting groove 62 prevents excessive torsion, ensuring structural stability. This design achieves "flexible buffering under rigid constraints," significantly improving the adaptability and durability of the clamp under complex working conditions.

[0032] IX. Ring Connection and Final Inspection Pass the hanging ring 8 through the lifting ring 53 on the wire clamp 5, and connect the other end of the hanging ring 8 to the predetermined hanging point on the tower using bolts. After all installations are completed, the following checks should be performed: visually inspect all external strands 2 for any crossings or gaps; check by hand for any abnormal looseness between the pressure ring 7 and the external clamping ring 6; confirm that the limiting post 71 has completely fallen into the limiting groove 62; and re-inspect the bolts 52 and screws 72 using a torque wrench.

[0033] 10. Simulate the disassembly and replacement process (emphasizing maintainability) Assuming that after two years of operation, the rubber sleeve 32 needs to be replaced due to aging caused by long-term ultraviolet radiation, the operation procedure is as follows: Remove the hanging ring 8 from the tower; loosen the screw 72 of the pressure ring 7 and remove the pressure ring 7; pry open and remove the outer wire clamping ring 6 by hand (the two half-rings 61 can be separated); loosen the bolt 52 of the wire clamp 5 and open the two clamps 51; pry open and remove the inner wire clamping ring 4 at the gap 42; press the locking teeth 313 and the locking groove 314 to separate the two combined frames 31; use a special flat tool to pull out the old rubber sleeve 32 from the end of the combined frame 31; insert the new rubber sleeve 32 into the end of the combined frame 31 in an "easy to insert, difficult to remove" manner; then reverse the above steps to complete the reassembly. The entire process does not require cutting or damaging any of the outer stranded wires 2 or inner stranded wires 1, achieving true modular maintenance.

[0034] XI. Adaptability Specifications for Special Working Conditions Icing condition: When the surface of cable 9 is covered with ice, the vertical load on the suspension clamp increases significantly. At this time, the radial pressure between the outer strand 2 and the inner clamping ring 4 increases, and the elastic deformation of the clamping groove 41 will slightly tighten the groove opening, further enhancing the gripping force on the outer strand 2, preventing slippage, and forming a positive feedback effect of "the greater the load, the tighter the grip".

[0035] Wind-induced vibration: High-frequency, low-amplitude vibrations are effectively attenuated by the rubber sleeve 32 of the combined rubber clamp 3. The elastic modulus of the rubber sleeve 32 (approximately 5-8 MPa) provides good vibration isolation. At the same time, the limiting sliding mechanism between the outer clamping ring 6 and the pressure ring 7 converts torsional vibrations into minute relative motions, preventing energy from accumulating at the fixed cross-section.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A pre-stretched suspension clamp for installing and connecting cables to towers in overhead transmission, characterized in that, The cable includes an inner twisted wire (1), an outer twisted wire (2), a combined rubber clamp (3), an inner wire clamp (4), a wire clamp (5), an outer wire clamp (6), a pressure ring (7), and a hanging ring (8). The inner twisted wire (1) is twisted around the outside of the cable (9), and the outer twisted wire (2) is twisted around the outside of the inner twisted wire (1). The combined rubber clamp (3) is located between the inner twisted wire (1) and the outer twisted wire (2). The wire clamp (5) tightly clamps the cable (9), the inner twisted wire (1), the outer twisted wire (2), and the combined rubber clamp (3) together at the combined rubber clamp (3), and connects to the tower connection point through the hanging ring (8). The inner clamping ring (4) is sleeved on the middle part of the combined rubber clamp (3) to clamp the outer twisted wire (2) and cooperate with the outer clamping ring (6) to clamp the outer twisted wire (2) to the outside of the combined rubber clamp (3) in accordance with the specified hardware installation guidelines. The two ends of the wire clamp (5) are provided with the outer wire clamping ring (6) for securing the outer twisted wire (2) at both ends of the wire clamp (5); The pressure ring (7) is located on the outside of the outer clamping ring (6) and is used to limit the axial rotation range of the outer clamping ring (6).

2. The pre-twisted suspension clamp according to claim 1, characterized in that, The combined rubber clamp (3) includes two combined skeletons (31) that are hinged to each other and rubber sleeves (32) that are fitted onto the two ends of each combined skeleton (31). The combined skeleton (31) is semi-tubular, with a limiting ring (312) in the inner ring of its middle. The two combined skeletons (31) are tightly fastened together by fastening teeth (313) and fastening grooves (314) to form a tubular skeleton. Each combined skeleton (31) has an arc-shaped protruding ring (311) at its end.

3. The pre-twisted suspension clamp according to claim 2, characterized in that, The inner wire clamping ring (4) has multiple wire clamping grooves (41) on its outer ring that match the outer twisted wire (2). The inner wire clamping ring (4) has a gap (42) so that it is not completely closed. This makes it easy for the inner wire clamping ring (4) to open at the gap (42) and fit into the middle of the snap-fit ​​tubular skeleton, and to externally constrain the outer wire clamping ring (6).

4. The pre-twisted suspension clamp according to claim 1, characterized in that, The outer wire clamping ring (6) is made up of two half rings (61) joined together, and the outer wire clamping ring (6) also has a wire clamping groove that matches the outer twisted wire (2).

5. The pre-twisted suspension clamp according to claim 1, characterized in that, The wire clamp (5) includes two clamps (51), the lower ends of the two clamps (51) are hinged, and the upper ends are connected to the hanging ring (8) by bolts (52) and lifting rings (53). The two axial ends of the clamps (51) are sleeved with the corresponding outer clamping wire rings (6).

6. The pre-stretched suspension clamp according to claim 5, characterized in that, The lower end of the pressure ring (7) is screwed to the hinge of the two clamps (51) by screws (72). The inner side of the pressure ring (7) is provided with multiple limiting posts (71). The outer side of the outer clamping ring (6) is provided with corresponding limiting grooves (62). The pressure ring (7) and the outer clamping ring (6) are slidably connected by the cooperation of the limiting posts (71) and the limiting grooves (62).

7. The pre-stretched suspension clamp according to claim 2, characterized in that, The rubber sleeve (32) has a skeleton groove (321) inside. The two ends of the combined skeleton (31) are inserted into the corresponding skeleton groove (321) of the rubber sleeve (32). The insertion position of the rubber sleeve (32) is limited by the limiting ring (312). The arc-shaped convex ring (311) is used to reduce the insertion friction and increase the difficulty of pulling out after the rubber sleeve (32) is fully inserted, forming an easy-to-insert-but-difficult-to-pull-out structure.

8. The pre-stretched suspension clamp according to claim 2, characterized in that, The two combined skeletons (31) of the combined rubber clip (3) are connected in a detachable fastening manner through the cooperation of the fastening teeth (313) and the fastening groove (314).

9. The pre-stretched suspension clamp according to claim 6, characterized in that, The matching structure of the limiting post (71) and the limiting groove (62) allows the outer clamping loop (6) to rotate axially within a limited range when subjected to the torsional force of the outer twisted wire (2) in order to buffer stress.

10. An assembly method based on the pre-twisted suspension clamp according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: Insert rubber sleeves (32) into both ends of the combined frame (31) to form two half-components of the combined rubber clamp (3); Step 2: Fasten the two combined skeletons (31) together so that they wrap around the outside of the cable (9) with the twisted inner wire (1), and fasten them tightly with the fasteners (313) and the slots (314); Step 3: Pry open the inner locking ring (4) at the gap (42) and fasten it to the middle of the snap-fitted composite frame (31); Step 4: Twist the outer strands (2) and insert them one by one into the slots (41) of the inner wire clamping ring (4); Step 5: Fasten the two loops (51) of the wire clamp (5), install the lifting ring (53) and tighten the bolt (52); Step 6: Fit the outer wire clamp (6) onto both ends of the clamp (51) and rotate the outer wire clamp (6) to make its wire clamping groove clamp the outer twisted wire (2); Step 7: Press the pressure ring (7) onto the outer clamping ring (6) so that its limiting post (71) is inserted into the limiting groove (62), and tighten the lower end of the pressure ring (7) with the clamp (51) using the screw (72); Step 8: Connect to the tower using the hanging ring (8).

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