Multi-dimensional damping pre-stranded spacer

Abstract

The present application relates to the technical field of power transmission line hardware, and particularly discloses a multi-dimensional damping pre-stranded spacer, which comprises a plurality of clamping assemblies arranged at intervals in the circumferential direction and connecting rods arranged between adjacent clamping assemblies, and the clamping assemblies and the connecting rods are sequentially connected to form a closed support ring. The clamping assembly is formed by a clamping plate I and a clamping plate II, and at least one of the clamping plates is provided with a hinged end rotatably connected with the connecting rod; the connecting rod is respectively provided with an elastic member and a limiting structure in two swing directions, so that the connecting rod elastically swings within a predetermined angle range and is rigidly limited when reaching the limit angle. A pre-stranded wire is arranged outside the clamping assembly, and the pre-stranded wire is wound around the outer periphery of the conductor and passes outside the clamping ring. The present application can elastically buffer multidirectional vibration while maintaining the spacing of the split conductor, and limit excessive deformation of the closed support ring.

Description

Technical Field

[0001] This invention relates to the field of transmission line hardware technology, specifically to a multi-dimensional vibration-damping pre-stretched spacer bar. Background Technology

[0002] Split conductors typically consist of multiple sub-conductors arranged at predetermined intervals. To limit the relative displacement between the sub-conductors and reduce the impact of wind vibration and galloping on the operational stability of the transmission line, conductor spacers need to be installed at intervals along the length of the line. Existing spacers usually adopt a rigid frame or a structure with arms extending outward from a central frame. Each arm end is equipped with a clamp, which is connected to the corresponding sub-conductor to maintain the designed spacing between the sub-conductors.

[0003] Under conditions of wind load, ice shedding, conductor vibration, and inconsistent stress on different sub-conductors, the sub-conductors do not always move synchronously. When using rigid frame spacers, the displacement of one sub-conductor can easily be transmitted directly to other clamp positions through the frame, resulting in significant instantaneous impacts on the connection nodes. If adjacent components are simply made freely hinged, the spacer as a whole will experience large angular changes, making it difficult to stably maintain the relative positions of the sub-conductors. Existing solutions using rubber pads and elastic sleeves at the clamps mainly buffer local contact impacts between the conductor and the clamp, lacking clear elastic constraints and limit switches for angular changes between adjacent supporting components.

[0004] Furthermore, when using openable clamps to hold conductors, there is a risk that the clamps may open or loosen under long-term alternating loads. Pre-stranded wires have a mature helical gripping method that can be placed outside the conductor and clamping rings without altering their original working principle, providing external constraint to the closed clamps. Therefore, it is necessary to provide a spacer bar that allows controlled bidirectional elastic oscillation between clamping nodes within a small angle range, while also providing rigid restraint when the oscillation reaches its limit, and simultaneously ensuring secondary anti-separation fixation of the clamping components. Summary of the Invention

[0005] This invention provides a multi-dimensional vibration-damping pre-twisted spacer bar, which aims to solve the problem that existing spacers are difficult to balance the buffering of small swings in multiple directions and the limiting of large swings while maintaining the spacing of split conductors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-dimensional vibration-damping pre-twisted spacer bar, comprising multiple clamping assemblies for clamping conductors, the multiple clamping assemblies being spaced apart circumferentially, and a connecting rod being provided between adjacent clamping assemblies; the multiple clamping assemblies and the multiple connecting rods being sequentially connected to form a closed support ring; each clamping assembly includes a clamping plate one and a clamping plate two, the clamping plate one and the clamping plate two cooperating to form a clamping ring for clamping conductors; at least one of the clamping plate one and the clamping plate two is provided with a hinge end, the hinge end being rotatably connected to the corresponding connecting rod; an elastic element and a limiting structure are respectively provided in two swing directions at the end of the connecting rod that is rotatably connected to the clamping assembly, the elastic element being located on the swing path of the connecting rod in the corresponding swing direction, and the limiting structure being located outside the corresponding elastic element to limit the swing angle of the connecting rod relative to the clamping assembly; a pre-twisted wire is provided on the outside of the clamping assembly, the pre-twisted wire being wound around the outer circumference of the conductor and passing through the outside of the clamping ring.

[0007] With the above structure, multiple clamping components and multiple connecting rods together form a closed support ring surrounding multiple split conductors. The rotational connection positions of each connecting rod and its corresponding clamping component form swingable nodes. When a conductor is displaced, the corresponding node can produce a local angular change. In the initial stage of swinging, the connecting rod causes the elastic element in the corresponding direction to undergo elastic deformation and generate a restoring force to buffer the impact generated by conductor vibration. After the connecting rod swings to a predetermined angle, a limiting structure prevents it from continuing to swing, so that the closed support ring can still maintain the spacing constraint on the sub-conductors. Multiple nodes are distributed circumferentially along the closed support ring, and can respectively form elastic responses to conductor displacements in different directions.

[0008] Preferably, the limiting structure includes two limiting plates, which are respectively fixedly disposed on both sides of the end of the connecting rod that is rotatably connected to the clamping assembly, and the two limiting plates are respectively capable of abutting against the opposite sides of the hinge end. The two limiting plates respectively limit the two swing directions of the connecting rod, so that the connecting rod has definite limit positions in both directions.

[0009] Preferably, the elastic element is a leaf spring, and two leaf springs are respectively disposed on the side of the two limiting plates that are close to each other, and the two leaf springs correspond to opposite sides of the hinge end; when the connecting rod swings in either direction relative to the hinge end, the leaf spring on the corresponding side is pressed by the hinge end and undergoes elastic deformation. When the connecting rod continues to swing to its limit position, the limiting plate on the corresponding side abuts against the hinge end. The leaf spring gradually generates a restoring force before the rigid limiting occurs, which can reduce the impact caused by the direct collision between the connecting rod and the limiting plate.

[0010] Preferably, one end of each connecting rod is fixedly connected to one of the two adjacent clamping assemblies, and the other end is rotatably connected to the other of the two adjacent clamping assemblies. This gives each connecting rod in the closed support ring a defined support direction and rotation node, preventing both ends of the connecting rod from rotating freely, which would result in excessive freedom of the support ring as a whole.

[0011] Preferably, the hinged end is disposed on clamping plate one, clamping plate one is rotatably connected to the connecting rod through the hinged end, and clamping plate two is fixedly connected to the connecting rod located on the other side of the clamping assembly. By forming a fixed connection relationship and a rotatable connection relationship on both sides of the same clamping assembly, adjacent connecting rods can continuously form a closed support ring through the clamping assembly.

[0012] Preferably, a connecting seat is provided at the end of the connecting rod corresponding to the clamping plate. The connecting seat is rotatably connected to the hinged end via a connecting pin, allowing the clamping plate to swing relative to the connecting rod around the connecting pin. The connecting seat provides a stable mounting position for the hinged end and the connecting pin, and reserves space for the arrangement of elastic elements and limiting structures on both sides.

[0013] Preferably, one end of the first clamp and the second clamp are rotatably connected by a hinge pin, allowing the first clamp and the second clamp to rotate relative to each other around the hinge pin. During installation, the two clamps can be opened to accommodate the wire, and then the two clamps can be closed to form a clamping ring.

[0014] Preferably, the rotatable connection between clamping plate one and clamping plate two is also used for folding and storing the spacer bars; when not installed on the conductor, clamping plate one and clamping plate two can rotate relative to each other around the hinge pin, so that the connecting rods located on both sides of the clamping assembly come closer to each other. For the hexagonal closed support ring corresponding to the six-split conductor, after folding, the six connecting rods come together in pairs to form three sets of folding units, so as to reduce the lateral unfolding size of the spacer bars.

[0015] Preferably, the clamping plates one and two form arc-shaped clamping portions on the side facing the conductor, which are adapted to the outer periphery of the conductor. When the clamping plates one and two are closed, the two arc-shaped clamping portions are together arranged around the outside of the conductor, so that the clamping assembly forms a large contact area with the outer periphery of the conductor.

[0016] Preferably, the pre-twisted wire includes two helical portions located on both sides of the clamping ring along the conductor axial direction and a connecting portion connecting the two helical portions. The two helical portions are respectively helically wound around the outer periphery of the conductor. The connecting portion is located outside the clamping ring to prevent the first clamp and the second clamp from separating from each other in the closed state. The pre-twisted wire is still connected to the conductor in its conventional helical winding manner, and its portion located outside the clamping ring further forms a passive peripheral constraint on the clamping assembly.

[0017] Preferably, the clamping plates one and two are respectively provided with limiting portions at both ends along their circumferential direction to restrict the connecting portion from disengaging from the clamping plates one or two along the circumferential direction, thereby keeping the pre-twisted wire in a set position outside the clamping ring.

[0018] The beneficial effects of the present invention using the above technical solution are as follows: A closed support ring is formed by sequentially connecting the clamping assembly and connecting rods, allowing the spacer rod to form continuous support around multiple conductors without relying on a central rigid frame; by setting elastic elements and limiting structures in the two swing directions at each rotating connection node, the connecting rod generates restoring force from the elastic elements during small swing phases, and forms rigid limiting by the limiting structure after reaching a predetermined swing angle, thus combining dynamic buffering and conductor spacing maintenance; by winding the pre-twisted wire around the conductor and passing it outside the clamping ring, a secondary anti-separation constraint can be formed on clamp plate one and clamp plate two without changing the original working principle of the pre-twisted wire, improving the retention reliability of the clamping assembly under long-term operation. Simultaneously, the hinge structure between clamp plate one and clamp plate two, in addition to being used for opening and closing the clamping ring, can also serve as a folding joint in the non-installation state, allowing the closed support ring to fold and retract; in the six-split embodiment, the six connecting rods can be brought together in pairs to form three sets of folding units, facilitating transportation, carrying, and unfolding operations before installation. The folding action is independent of the vibration-damping rotation between the connecting rod and the hinge end, and does not change the limitation of the running swing angle by the leaf spring and the limiting plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0021] Figure 3 This is a schematic diagram of the structure of the present invention after the pre-twisted wires are removed.

[0022] Figure 4 for Figure 3 A magnified structural diagram at point B in the middle.

[0023] Figure 5 This is a partial cross-sectional view of the clamping component in this invention.

[0024] Figure 6 This is a schematic diagram of the structure when the two connecting rods are in a folded state in this invention.

[0025] Reference numerals: 1. Clamping assembly; 11. Clamping plate one; 12. Clamping plate two; 13. Limiting part; 14. Hinge end; 15. Hinge pin; 16. Arc-shaped clamping part; 2. Connecting rod; 21. Connecting seat; 22. Connecting pin; 3. Elastic element; 4. Limiting structure; 5. Pre-twisted wire; 51. Spiral part; 52. Connecting part; 6. Conductor. Detailed Implementation

[0026] like Figures 1-6 As shown, this embodiment provides a multi-dimensional vibration-damping pre-stretched spacer. For ease of explanation, this embodiment uses a six-split conductor as an example. In actual applications, the number of clamping components 1 and connecting rods 2 can be set according to the number and arrangement of the split conductors.

[0027] Multiple clamping components 1 are arranged circumferentially at intervals, each clamping component 1 corresponding to one wire 6, and a connecting rod 2 is provided between two adjacent clamping components 1. The multiple clamping components 1 and multiple connecting rods 2 are connected in sequence to form a closed support ring that fits around the multiple wires 6. The closed support ring is used to maintain the relative position between the wires 6, and at the same time, through the partial rotational connection between each clamping component 1 and the connecting rod 2, the closed support ring can adapt to small relative displacements of the wires 6 during operation.

[0028] The clamping assembly 1 includes a first clamping plate 11 and a second clamping plate 12. Both the first clamping plate 11 and the second clamping plate 12 have an arc-shaped structure adapted to the outer periphery of the conductor 6, and arc-shaped clamping portions 16 are formed on the side facing the conductor 6. One end of the first clamping plate 11 and the second clamping plate 12 are rotatably connected by a hinge pin 15, so that the first clamping plate 11 and the second clamping plate 12 can be opened or closed relative to each other around the hinge pin 15. After the first clamping plate 11 and the second clamping plate 12 are closed, the two arc-shaped clamping portions 16 together surround the outside of the conductor 6 and form a clamping ring.

[0029] In this embodiment, one end of each connecting rod 2 is fixedly connected to one of the two adjacent clamping assemblies 1, and the other end is rotatably connected to the other of the two adjacent clamping assemblies 1. Specifically, a hinged end 14 extending outward is formed on clamping plate one 11, and a connecting seat 21 is provided at the end of the connecting rod 2 corresponding to clamping plate one 11. The connecting seat 21 is rotatably connected to the hinged end 14 through a connecting pin 22; clamping plate two 12 is fixedly connected to the connecting rod 2 located on the other side of the clamping assembly 1. Thus, a rotatable connection node is formed on one side of the same clamping assembly 1, and a fixed connection node is formed on the other side. Each connecting rod 2 is arranged sequentially along the circumference of the closed support ring according to the same connection relationship.

[0030] When folding and storing is required, the spacer bar is in a non-working state without clamping the wire. The hinge pin 15 between clamp plate 11 and clamp plate 22 serves as the folding pivot, allowing clamp plate 11 and clamp plate 22 to rotate relative to each other. Since clamp plate 11 is connected to one side connecting rod 2 via hinge end 14 and connecting pin 22, and clamp plate 22 is fixedly connected to the other side connecting rod 2, the relative rotation of the two clamp plates can drive the connecting rods 2 on both sides of the clamping assembly 1 to move closer to each other, thereby causing the closed support ring to gradually close from its unfolded polygonal state.

[0031] Taking the hexagonal closed support ring corresponding to the six-split conductor as an example, the six connecting rods 2 are folded and brought together in pairs to form three sets of folding units. The connecting rods 2 in each set are arranged roughly parallel or close to each other, so that the clamping components 1 are concentrated and the whole forms a compact folded state extending along the length of the connecting rods 2, thereby reducing the space occupied during transportation and carrying.

[0032] One end of the connecting rod 2, which is rotatably connected to the clamping assembly 1, is provided with an elastic element 3 and a limiting structure 4. The limiting structure 4 includes two limiting plates, which are respectively fixedly disposed on opposite sides of the end of the connecting rod 2 and located in two swing directions of the hinge end 14. The hinge end 14 is located between the two limiting plates, and the connecting pin 22 constitutes the rotation center of the connecting rod 2 relative to the clamping assembly 1.

[0033] In this embodiment, the elastic element 3 is a U-shaped leaf spring. Two leaf springs are respectively positioned on the side of the two limiting plates that are close to each other, and correspond to the opposite sides of the hinge end 14. One end of the leaf spring is fixed to the corresponding limiting plate, and the other end extends towards the hinge end 14. Space is left between the leaf spring and the limiting plate for the leaf spring to bend and deform. Depending on actual needs, the leaf spring can maintain contact with the hinge end 14 when the connecting rod 2 is in its initial position, or a smaller gap can be reserved; in this embodiment, it is preferable that both leaf springs maintain slight contact with the hinge end 14 to reduce the free clearance at the node.

[0034] When the connecting rod 2 rotates relative to the clamping assembly 1 in the first swing direction, the hinge end 14 approaches the first side leaf spring and presses against it. The first side leaf spring gradually undergoes elastic bending and generates a restoring force opposite to the swing direction; at this time, the other side leaf spring gradually unloads. As the swing angle continues to increase, the first side leaf spring continues to deform. When the connecting rod 2 swings to the predetermined limit angle, the first side limiting plate directly abuts against the hinge end 14, thereby preventing the connecting rod 2 from continuing to swing in that direction.

[0035] When the connecting rod 2 rotates in the second swing direction, opposite to the first swing direction, the second side leaf spring generates elastic deformation and restoring force in the same manner, and after reaching the corresponding limit angle, the second side limiting plate abuts against the hinge end 14. Thus, each rotating connection node forms a bidirectional elastic buffer and a bidirectional rigid limit. In this embodiment, the maximum swing angle of the connecting rod 2 relative to its initial position in both directions can be set to approximately 10°, and this angle can be adjusted according to the conductor 6 specifications, split spacing, leaf spring stiffness, and line operating conditions.

[0036] The aforementioned elastic element 3 is not limited to a leaf spring. It can also be an elastic rubber element, a compression spring, or other elastic components, provided it can provide elastic restoring force for the relative swing of the connecting rod 2. The limiting structure 4 can also be a limiting block or limiting protrusion that can rigidly abut against the hinge end 14 at a set swing angle. In this embodiment, the leaf spring and limiting plate work together to facilitate the generation of a gradually increasing restoring force along the swing direction within a small installation space, and the limiting plate can bear the load at extreme positions.

[0037] After the clamping assembly 1 is installed on the conductor 6, a pre-stranded wire 5 is further provided on the outside of the clamping assembly 1. The pre-stranded wire 5 still uses the pre-formed spiral wire commonly used in transmission lines and is installed according to its conventional winding method, without forming a motion linkage with the connecting rod 2, leaf spring or limiting plate. The pre-stranded wire 5 includes two spiral parts 51 located on both sides of the clamping ring along the axial direction of the conductor 6 and a connecting part 52 located between the two spiral parts 51. The two spiral parts 51 are respectively spirally wound around the outer circumference of the conductor 6, and the connecting part 52 spans across the outside of the clamping ring.

[0038] After the pre-twisted wire 5 is installed, the connecting part 52 forms an outer covering constraint on the clamping plates 11 and 12. When the clamping plates 11 and 12 tend to separate, the connecting part 52 restricts the two clamping plates from opening outward, thus forming a secondary anti-separation fixation based on the clamping of the wire clamp itself. Limiting parts 13 are respectively provided at both ends of the outer peripheral surface of the clamping plates 11 and 12 along their circumferential direction. The connecting part 52 of the pre-twisted wire 5 is located between the corresponding limiting parts 13. The limiting parts 13 are used to restrict the connecting part 52 from passing over the clamping plates 11 or 12 along the circumferential direction of the clamping ring, reducing the possibility of the pre-twisted wire 5 slipping off from the set covering position.

[0039] During installation, first ensure that at least one unconnected position remains on the closed support ring, and then sequentially arrange each clamping component 1 to the corresponding conductor 6. Rotate clamping plate one 11 and clamping plate two 12 to open the clamping ring, place the conductor 6 between the two arc-shaped clamping parts 16, and then close clamping plate one 11 and clamping plate two 12. After each clamping component 1 is positioned with its corresponding conductor 6, connect the unconnected positions of the closed support ring, so that multiple clamping components 1 and multiple connecting rods 2 form a complete closed loop. Then, follow the conventional pre-twisted wire installation method to wind the pre-twisted wire 5 around the outer periphery of the conductor 6, and ensure that the connecting part 52 passes through the outside of the clamping ring.

[0040] Working principle: During line operation, when one or more conductors 6 are subjected to wind vibration, galloping, or instantaneous impact and generate relative displacement, the clamping assembly 1 connected to the corresponding conductor 6 will move along with the conductor 6, thereby causing relative swinging between the clamping assembly 1 and the adjacent connecting rod 2. When the connecting rod 2 swings within a predetermined angle range, the corresponding side leaf spring undergoes elastic deformation, applying a restoring force to the node and buffering the vibration displacement; when the swing reaches the predetermined limit angle, the corresponding limiting plate abuts against the hinge end 14, changing the node from an elastic buffer state to a rigid limiting state, preventing the closed support ring from continuing to deform excessively.

[0041] Because multiple rotating connection nodes are distributed circumferentially along the closed support ring, each node can generate bidirectional elastic oscillation according to the movement direction of the corresponding conductor 6, so that the vibration of conductors in different directions can be dispersed and buffered at adjacent nodes. After the connecting rod 2 reaches its limit position, the limiting plate bears the further support load, so that the closed support ring can maintain the constraint on the spacing of each conductor 6 while having a certain degree of flexibility. The pre-twisted wire 5 only serves as a passive reinforcement after the clamping assembly 1 is closed, and does not participate in the above-mentioned vibration reduction action. Its connecting part 52 continuously covers the outside of the clamping ring, forming an anti-separation constraint on the clamping plate 11 and the clamping plate 12.

[0042] The above embodiments are used to illustrate the structure and working process of the present invention. Without changing the basic concept that the clamping components, the connecting rods form a closed support ring, and the rotating connection nodes have bidirectional elastic buffering and limit limiting, the number of clamping components, the length of the connecting rods, the predetermined swing angle, and the stiffness of the elastic element can all be selected according to different split conductor forms and line parameters.

Claims

1. A multi-dimensional vibration-damping pre-twisted spacer bar, comprising multiple clamping components for clamping conductors, characterized in that: The plurality of clamping components are arranged at circumferential intervals, and a connecting rod is provided between each two adjacent clamping components. The plurality of clamping components and the plurality of connecting rods are sequentially connected to form a closed support ring. The clamping assembly includes a first clamping plate and a second clamping plate, which cooperate with each other to form a clamping ring for clamping the wire; At least one of the clamping plate one and the clamping plate two is provided with a hinge end, and the hinge end is rotatably connected to the corresponding connecting rod; The connecting rod is rotatably connected to the clamping assembly. An elastic element and a limiting structure are respectively provided in two swing directions at one end. The elastic element is located on the swing path of the connecting rod in the corresponding swing direction, and the limiting structure is located on the outside of the corresponding elastic element to limit the swing angle of the connecting rod relative to the clamping assembly. The clamping assembly has a pre-twisted wire on its outer side, which is wound around the outer circumference of the conductor and passes through the outer side of the clamping ring.

2. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 1, characterized in that, The limiting structure includes two limiting plates, which are respectively fixedly disposed on both sides of the end of the connecting rod that is rotatably connected to the clamping assembly, and the two limiting plates can respectively abut against the opposite sides of the hinge end.

3. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 2, characterized in that, The elastic element is a leaf spring, and two leaf springs are respectively disposed on the side of the two limiting plates that are close to each other. The two leaf springs correspond to the opposite sides of the hinge end. When the connecting rod swings relative to the hinge end in any direction, the leaf spring on the corresponding side is pressed by the hinge end and generates elastic deformation. When the connecting rod continues to swing to the limit position, the limiting plate on the corresponding side abuts against the hinge end.

4. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 1, characterized in that, One end of each of the connecting rods is fixedly connected to one of the two adjacent clamping assemblies, and the other end is rotatably connected to the other of the two adjacent clamping assemblies.

5. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 1, characterized in that, The hinge end is disposed on the first clamping plate, and the first clamping plate is rotatably connected to the connecting rod through the hinge end. The second clamping plate is fixedly connected to the connecting rod located on the other side of the clamping assembly.

6. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 5, characterized in that, A connecting seat is provided at the end of the connecting rod corresponding to the clamping plate. The connecting seat is rotatably connected to the hinge end through a connecting pin, so that the clamping plate can swing relative to the connecting rod around the connecting pin.

7. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 1, characterized in that, One end of the first clamping plate and the second clamping plate are rotatably connected by a hinge pin, so that the first clamping plate and the second clamping plate can rotate relative to each other around the hinge pin.

8. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 1, characterized in that, The clamping plates one and two form arc-shaped clamping parts on the side facing the conductor, which are adapted to the outer periphery of the conductor. When the clamping plates one and two are closed, the two arc-shaped clamping parts together surround the outside of the conductor.

9. The multi-dimensional vibration-damping pre-stirred spacer bar according to claim 8, characterized in that, The pre-twisted wire includes two helical portions located on both sides of the clamping ring along the conductor axial direction and a connecting portion connecting the two helical portions. The two helical portions are respectively spirally wound around the outer periphery of the conductor. The connecting portion is located on the outside of the clamping ring to restrict the separation of clamp plate one and clamp plate two in the closed state.

10. The multidimensional vibration-damping pre-stirred spacer bar according to claim 9, characterized in that, Limiting portions are provided at both ends of the clamping plate one and clamping plate two along their circumferential direction to restrict the connecting portion from disengaging from clamping plate one or clamping plate two along the circumferential direction.

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