A pre-assembled double suspension clamp and method of use

Abstract

The application discloses a pre-stranded double-suspension clamp and a use method thereof, and belongs to the technical field of overhead transmission lines. The pre-stranded double-suspension clamp comprises, from inside to outside, an inner strand, a rubber pad, an outer strand, a shell, a clamp and a hanging plate. The shell comprises a middle adjusting ring and an end extruding ring. The end extruding ring is movably connected to the two sides of the middle adjusting ring. The inner strand, the rubber pad and the outer strand all penetrate through the middle adjusting ring and the end extruding ring. The application solves the problem of difficult installation and insufficient holding force. The pre-stranded double-suspension clamp and the use method thereof are characterized in that the rubber pad is connected through the end block and the groove, the position can be easily found, the shell comprises the middle adjusting ring and the end extruding ring, the diameter of the middle adjusting ring can be controlled to be reduced by screwing the bolt, the end extruding ring is driven to move, the pressure is applied to the circular table structure, the gap is eliminated, and the holding force is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overhead power transmission lines, in particular to a pre-stranded double suspension clamp and a using method thereof. BACKGROUND

[0002] Most of the suspension clamps on the current market rely on manual on-site adjustment to adapt to different diameters of conductors, which not only makes the installation process cumbersome, but also makes it difficult to ensure that the optimal pre-tightening force and grip force distribution can be achieved every time.

[0003] A pre-stranded double suspension clamp is disclosed in Chinese Patent No. CN113889955B. The pre-stranded double suspension clamp with large tonnage and large suspension angle is a pre-stranded double suspension clamp for large load and large suspension angle optical cable OPGW, which can withstand at least 840kN vertical breaking load, and the suspension angle at both ends can reach 30°, especially suitable for use in straight towers with large height difference and high suspension point. However, in the patent, the rubber pad is positioned by a boss and a recess, the boss and the recess are located inside the rubber pad, and during installation, it is not easy to align, and the structure of the shell is fixed, so the pre-tightening force and the grip force cannot be adjusted. SUMMARY

[0004] The purpose of the present application is to provide a pre-stranded double suspension clamp and a using method thereof, which connects the rubber pad through the end block and the groove, making it easy to observe and find the position, and solving the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a pre-stranded double suspension clamp, which comprises, from inside to outside, an inner strand, a rubber pad, an outer strand, a shell, a clamp and a hanging plate, the shell comprises a middle adjusting ring and an end extrusion ring, the middle adjusting ring is movably connected with the end extrusion ring on both sides, the inner strand, the rubber pad and the outer strand all penetrate through the middle adjusting ring and the end extrusion ring, the outer strand is symmetrically wound outside the inner strand and the rubber pad, the middle adjusting ring is sleeved with the clamp, and the upper end of the clamp is connected with the middle adjusting ring and the hanging plate through bolts.

[0006] Preferably, the rubber pad is a hollow cylindrical structure with a narrow middle and wide ends, composed of two center-symmetric semi-cylindrical structures, and the two ends of the rubber pad are provided with a block and a groove in a staggered manner, and the block and the groove are matched with each other.

[0007] Preferably, the rubber pad is provided with a circular truncated cone structure at both ends, a clamping groove with a V-shaped cross section is formed in the interior of the circular truncated cone structure, and a support frame is arranged in the clamping groove.

[0008] Preferably, the middle adjusting ring is a circular ring structure composed of two half-ring structures, a first connecting plate is arranged on one side of the middle adjusting ring, and a first bolt hole is formed in the first connecting plate.

[0009] Preferably, the intermediate adjusting ring is provided with a concave taper surface near the side wall of the end extrusion ring, and a limiting sliding groove is equidistantly arranged on the concave taper surface.

[0010] Preferably, the end extrusion ring is provided with a convex taper surface near one side of the intermediate adjusting ring, the convex taper surface is matched with the concave taper surface, a limiting sliding block is equidistantly arranged on the convex taper surface, the limiting sliding block is movably connected with the limiting sliding groove, the end extrusion ring is a horn-shaped structure formed by two half-ring structures, and the inner wall of the end extrusion ring is matched with the side wall of the circular truncated cone structure.

[0011] Preferably, the intermediate adjusting ring is provided with a first inclined surface near one end of the first connecting plate, and the two half-ring structures of the intermediate adjusting ring are both provided with an adjusting gap near the one end of the first inclined surface.

[0012] Preferably, the hanging plate comprises a mounting plate and a second connecting plate, the second connecting plate is fixedly connected with the mounting plate, the lower end of the second connecting plate is provided with a second inclined surface, and the second inclined surface is matched with the first inclined surface.

[0013] Preferably, the second connecting plate, the hoop and the first connecting plate are all provided with a first bolt hole at the corresponding positions, and the mounting plate is provided with a second bolt hole.

[0014] Another technical problem to be solved by the application is to provide a use method of the pre-stranded double-suspension wire clamp.

[0015] S1: after the inner stranded wire is wound with the cable, a rubber pad is installed, the outer stranded wire is wound outside the rubber pad, the shell is installed at the corresponding position of the rubber pad, and the hoop and the hanging plate are fixed with the shell through bolts;

[0016] S2: the bolts connected with the hoop, the hanging plate and the shell are screwed, the position of the shell is adjusted, the gap among the inner stranded wire, the rubber pad and the outer stranded wire is eliminated, and then the inner stranded wire and the outer stranded wire are tightened.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The pre-twisted double-suspension clamp and the using method thereof, the rubber pad is connected through the clamping block and the groove of the end part, convenient to observe and easy to find the position, after the shell is installed, the position of the rubber pad is limited and cannot be separated, the shell comprises the intermediate adjusting ring and the end extrusion ring, the intermediate adjusting ring and the end extrusion ring adopt the movable connection structure, the diameter of the intermediate adjusting ring can be controlled to be reduced through the screwing bolt, and then the end extrusion ring is driven to move, the pressure is applied to the circular table structure, and then the gap is eliminated and the holding force is increased, the second connecting plate is limited from the upper end of the intermediate adjusting ring, the outward deformation of the intermediate adjusting ring can be avoided, the uniform force of the intermediate adjusting ring is ensured, meanwhile, the position of the hanging plate is limited by the intermediate adjusting ring, so that the second connecting plate and the first connecting plate do not need to be clamped tightly, and the adjusting space of the hoop can be reserved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall installation drawing of the pre-twisted double-suspension clamp of the application;

[0020] Figure 2 It is the exploded view of the rubber pad, the shell, the hoop and the hanging plate of the application;

[0021] Figure 3 It is the exploded view of the rubber pad of the application;

[0022] Figure 4 It is the exploded view of the shell of the application;

[0023] Figure 5 It is the connection schematic view of the rubber pad and the shell of the application;

[0024] Figure 6 It is the connection schematic view of the intermediate adjusting ring, the hoop and the hanging plate of the application.

[0025] In the drawing: 1, inner twisted wire; 2, rubber pad; 21, circular table structure; 211, clamping groove; 22, support frame; 23, clamping block; 24, groove; 3, outer twisted wire; 4, shell; 41, intermediate adjusting ring; 411, first connecting plate; 4111, first bolt hole; 412, recessed taper surface; 413, limiting sliding groove; 414, first inclined surface; 415, adjusting gap; 42, end extrusion ring; 421, protruding taper surface; 422, limiting sliding block; 5, hoop; 6, hanging plate; 61, mounting plate; 611, second bolt hole; 62, second connecting plate; 621, second inclined surface. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0027] In order to solve the problems that the existing positioning of the rubber pad through the boss and the recess is located in the interior of the rubber pad, it is not easy to align during installation, and the structure of the shell is fixed, and the pre-tightening force and the gripping force cannot be adjusted, please refer to Figures 1-6 The technical solutions are provided in the embodiments as follows.

[0028] In the embodiment, the pre-stranding type double-suspension clamp sequentially comprises an inner strand 1, a rubber pad 2, an outer strand 3, a shell 4, a clamp 5 and a hanging plate 6 from inside to outside, the rubber pad 2 is provided with a center hole matched with the cable, the inner strand 1 penetrates through the center hole and is wound with the cable, the shell 4 comprises a middle adjusting ring 41 and an end extruding ring 42, the end extruding ring 42 is movably connected to the two sides of the middle adjusting ring 41, the inner strand 1, the rubber pad 2 and the outer strand 3 all penetrate through the middle adjusting ring 41 and the end extruding ring 42, the outer strand 3 is symmetrically wound outside the inner strand 1 and the rubber pad 2, the clamp 5 is sleeved outside the middle adjusting ring 41, the clamp 5 is in a U-shaped structure and has the same width as the middle adjusting ring 41, after the clamp 5 is installed, the clamp 5 covers the middle adjusting ring 41 from the bottom and the side of the middle adjusting ring 41, so that the clamp 5 mainly tightens the bottom and the side of the middle adjusting ring 41 after being tightened, the second connecting plate 62 limits the middle adjusting ring 41 from the upper end of the middle adjusting ring 41, so as to avoid the deformation of the middle adjusting ring 41 outward, and the upper end of the clamp 5 is connected with the middle adjusting ring 41 and the hanging plate 6 through bolts.

[0029] In the embodiment, the rubber pad 2 is a hollow column structure with a narrow middle and wide ends, which is composed of two center-symmetric half-cylinder structures, the rubber pad 2 is provided with a clamping block 23 and a groove 24 at the two ends in a staggered manner, the clamping block 23 and the groove 24 are matched with each other, the two half-cylinder structures are inserted through the clamping block 23 and the groove 24, during the insertion, the two half-cylinder structures move towards each other along the cable direction until the clamping block 23 and the groove 24 are inserted with each other, the clamping block 23 and the groove 24 are arranged at the end positions of the rubber pad 2, so that the installation is convenient to observe and can quickly align the position, thereby reducing the installation difficulty, and after the insertion, the two half-cylinder structures can only move along the cable direction to be separated.

[0030] In the embodiment, the rubber pad 2 is symmetrically provided with a circular truncated cone structure 21 at both ends, the circular truncated cone structure 21 is a structure fixedly connected by two same-base truncated cones, a clamping groove 211 with a V-shaped cross section is formed in the circular truncated cone structure 21, a support frame 22 is arranged in the clamping groove 211, the support frame 22 also has a V-shaped structure in cross section, the support frame 22 supports the circular truncated cone structure 21, when the circular truncated cone structure 21 is pressed, the circular truncated cone structure 21 is extruded to the support frame 22, the V-shaped tip of the support frame 22 is pressed, the wider end of the support frame 22 is pressed to be widened, the position of the circular truncated cone structure 21 in contact with the cable is extruded to be tight, the gap between the inner twisted wire 1 and the cable is eliminated, and the holding force is improved.

[0031] In the embodiment, the intermediate adjusting ring 41 is a circular ring structure composed of two half-ring structures, the first connecting plate 411 is arranged on one side of the intermediate adjusting ring 41, the first bolt hole 4111 is formed in the first connecting plate 411, during installation, the first connecting plates 411 on the intermediate adjusting ring 41 are arranged in parallel, the hanging plate 6 is inserted between the first connecting plates 411, and the clamp 5 is wrapped outside the first connecting plates 411, the shell 4, the clamp 5 and the hanging plate 6 are fixed by the bolts penetrating through the first bolt holes 4111.

[0032] In the embodiment, the recessed taper surface 412 is arranged on the position close to the side wall of the end extrusion ring 42 of the intermediate adjusting ring 41, the limiting sliding groove 413 is equidistantly formed in the recessed taper surface 412, and the limiting sliding groove 413 is used for limiting the position of the end extrusion ring 42 to prevent the end extrusion ring 42 from rotating in the intermediate adjusting ring 41.

[0033] In the embodiment, the protruding taper surface 421 is arranged on the side close to the intermediate adjusting ring 41 of the end extrusion ring 42, the protruding taper surface 421 is attached to the recessed taper surface 412, the limiting sliding block 422 is equidistantly arranged on the protruding taper surface 421, the limiting sliding block 422 is movably connected with the limiting sliding groove 413, the intermediate adjusting ring 41 and the end extrusion ring 42 cannot be separated through the movable connection of the limiting sliding block 422 and the limiting sliding groove 413, but when the diameter of the intermediate adjusting ring 41 is adjusted, the end extrusion ring 42 can move in the limiting sliding groove 413 through the limiting sliding block 422, the end extrusion ring 42 has a horn-shaped structure composed of two half-ring structures, the inner wall of the end extrusion ring 42 is matched with the side wall of the circular truncated cone structure 21, when the end extrusion ring 42 is sleeved with the circular truncated cone structure 21, the end extrusion ring 42 is connected with the circular truncated cone structure 21 through taper surfaces, the position of the end extrusion ring 42 is pushed and extruded, the deformation degree of the circular truncated cone structure 21 can be changed, the contact tightness of the circular truncated cone structure 21 with the cable is improved, the gap between the inner twisted wire 1 and the outer twisted wire 3 is eliminated, and the holding force is improved.

[0034] In the embodiment, the first inclined surface 414 is arranged on one end of the first connecting plate 411, and the two half-ring structures of the intermediate adjusting ring 41 are provided with adjusting gaps 415 at one end close to the first inclined surface 414. When the two half-ring structures of the intermediate adjusting ring 41 are close to each other, the adjusting gaps 415 are reduced, and the diameter of the intermediate adjusting ring 41 is reduced.

[0035] In the embodiment, the hanging plate 6 comprises a mounting plate 61 and a second connecting plate 62. The second connecting plate 62 is fixedly connected with the mounting plate 61. The second connecting plate 62 is provided with a second inclined surface 621 at the lower end. The second inclined surface 621 is in abutment with the first inclined surface 414. After the second connecting plate 62 is installed with the first connecting plate 411, the second inclined surface 621 plays a role of abutting against the first inclined surface 414, the diameter of the intermediate adjusting ring 41 is reduced, the second connecting plate 62 can press at the connection of the intermediate adjusting ring 41, prevent the connection of the intermediate adjusting ring 41 from deforming outward, ensure the uniform diameter reduction of the intermediate adjusting ring 41, and uniformly press the end extrusion ring 42.

[0036] In the embodiment, the second connecting plate 62, the hoop 5 and the first connecting plate 411 are provided with first bolt holes 4111 at corresponding positions. The mounting plate 61 is provided with second bolt holes 611. The mounting plate 61 is connected with the connecting fittings of the overhang string through bolts penetrating the second bolt holes 611.

[0037] In order to better show the use process of the pre-stranded double overhang clamp, the embodiment provides a use method of the pre-stranded double overhang clamp, which comprises the following steps.

[0038] Step one: after the inner stranded wire 1 is wound with the cable, the rubber pad 2 is installed. When the rubber pad 2 is installed, first, the two half-cylindrical structures are clamped with the cable covered with the inner stranded wire 1, and then the two half-cylindrical structures are moved towards each other until the clamping blocks 23 and the grooves 24 are inserted with each other to fix the position of the rubber pad 2. The outer stranded wire 3 is wound outside the rubber pad 2 and the inner stranded wire 1 in a central and symmetrical manner. Then, the shell 4 is installed at the position corresponding to the rubber pad 2. The intermediate adjusting ring 41 is clamped at the narrowest position of the rubber pad 2. The end extrusion ring 42 half-encloses the circular table structure 21. The rubber pad 2 is fixed and prevented from being separated. The hoop 5 and the hanging plate 6 are fixed with the shell 4 through bolts. The hoop 5 is clamped with the intermediate adjusting ring 41. The second connecting plate 62 is inserted between the first connecting plates 411, and the second inclined surface 621 is in abutment with the first inclined surface 414. Then, the bolts penetrate the first bolt holes 4111 to be connected.

[0039] Step two: screw the bolt connecting the clamp 5, the hanging plate 6 and the shell 4, adjust the position of the shell 4, after the bolt is tightened, the opening at the upper end of the clamp 5 is reduced, the intermediate adjusting ring 41 is pressed close to each other, the adjusting gap 415 is reduced, the clamp 5 presses the lower end and the side wall of the intermediate adjusting ring 41, the upper end of the second connecting plate 62 abuts against the upper end of the intermediate adjusting ring 41, the diameter of the intermediate adjusting ring 41 is reduced, the intermediate adjusting ring 41 extrudes the convex taper surface 421 through the concave taper surface 412, the end extrusion ring 42 is away from each other, the circular truncated cone structure 21 is extruded, the circular truncated cone structure 21 is tightly attached to the inner wire 1 and the outer wire 3, the gap between the inner wire 1, the rubber pad 2 and the outer wire 3 is eliminated, and the inner wire 1 and the outer wire 3 are further tightened.

[0040] In summary: the pre-twisted double suspension wire clamp and the using method thereof provided by the application, the rubber pad 2 is connected through the end block 23 and the groove 24, which is convenient to observe and easy to find the position, after the shell 4 is installed, the position of the rubber pad 2 is limited and cannot be separated, the shell 4 includes the intermediate adjusting ring 41 and the end extrusion ring 42, the intermediate adjusting ring 41 and the end extrusion ring 42 adopt a movable connection structure, the diameter of the intermediate adjusting ring 41 can be controlled to be reduced by screwing the bolt, thereby driving the end extrusion ring 42 to move and press the circular truncated cone structure 21, thereby eliminating the gap and increasing the grip, the second connecting plate 62 limits the intermediate adjusting ring 41 from the upper end thereof, which can avoid the deformation of the intermediate adjusting ring 41 outward, ensure that the intermediate adjusting ring 41 is uniformly stressed, and limit the position of the hanging plate 6 at the same time, so that the second connecting plate 62 and the first connecting plate 411 do not need to be clamped tightly and the adjustment space of the clamp 5 can be reserved.

[0041] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the claims and their equivalents.

Claims

1. A pre-assembled double suspension clamp, comprising, in order from inside to outside, an inner strand (1), a rubber pad (2), an outer strand (3), a housing (4), a clamp (5) and a hanging plate (6), characterized in that: The housing (4) comprises a middle adjustment ring (41) and an end extrusion ring (42). Both sides of the middle adjustment ring (41) are movably connected to the end extrusion ring (42). The inner twisted wire (1), the rubber pad (2) and the outer twisted wire (3) all pass through the middle adjustment ring (41) and the end extrusion ring (42). The outer twisted wire (3) is symmetrically wound around the inner twisted wire (1) and the rubber pad (2). The outer portion of the middle adjustment ring (41) is sleeved with a hoop (5). The upper end of the hoop (5) is simultaneously connected to the middle adjustment ring by a bolt. The intermediate adjustment ring (41) is connected to the hanging plate (6), the intermediate adjustment ring (41) is a circular ring structure composed of two half-ring structures, a first connecting plate (411) is provided on one side of the intermediate adjustment ring (41), a first bolt hole (4111) is provided on the first connecting plate (411), a concave conical surface (412) is provided on the side wall of the intermediate adjustment ring (41) near the end extrusion ring (42), and a limiting sliding groove (413) is provided on the concave conical surface (412) at equal distances, and the end extrusion ring (42) is provided with a convex conical surface (421) on one side close to the middle adjustment ring (41), the convex conical surface (421) is fitted with the concave conical surface (412), and a limiting slider (422) is provided on the convex conical surface (421) at an equal distance, the limiting slider (422) is movably connected to the limiting slide groove (413), the end extrusion ring (42) is a trumpet-shaped structure composed of two half-ring structures, the inner wall of the end extrusion ring (42) matches the side wall of the frustum structure (21), and the middle adjustment ring (41) is provided with a convex conical surface (421) and a concave conical surface (412). ) is provided with a first inclined surface (414) at one end close to the first connecting plate (411), and an adjustment gap (415) is left at one end of the two half-ring structures of the middle adjustment ring (41) close to the first inclined surface (414), the hanging plate (6) includes a mounting plate (61) and a second connecting plate (62), the second connecting plate (62) is fixedly connected to the mounting plate (61), and a second inclined surface (621) is provided at the lower end of the second connecting plate (62), and the second inclined surface (621) is in contact with the first inclined surface (414).

2. The preassembled twin suspension strain clamp of claim 1, wherein: The rubber pad (2) is a hollow cylindrical structure that is narrow in the middle and wide at both ends and is composed of two centrosymmetrical semi-cylindrical structures. Blocks (23) and grooves (24) are staggeredly provided at both ends of the rubber pad (2), and the blocks (23) and grooves (24) match each other.

3. The preassembled double suspension clamp of claim 1, wherein: The rubber pad (2) is symmetrically provided with truncated cone structures (21) at both ends. A V-shaped engaging groove (211) is provided inside the truncated cone structure (21), and a support frame (22) is provided inside the engaging groove (211).

4. The preassembled twin suspension strain clamp of claim 1 wherein: First bolt holes (4111) are provided at positions corresponding to the second connecting plate (62), the hoop (5) and the first connecting plate (411), and a second bolt hole (611) is provided on the mounting plate (61).

5. A method of using the preassembled double suspension clamp of claim 1, wherein, The following steps are involved: S1: after winding the inner strand (1) with the cable, install the rubber pad (2), wrap the outer strand (3) outside the rubber pad (2), and then install the shell (4) to the corresponding position of the rubber pad (2), and the shell (4) is fixed with the hoop (5) and the hanging plate (6) through bolts; S2: tighten the bolts connected with the hoop (5), the hanging plate (6) and the shell (4), adjust the position of the shell (4), eliminate the gap between the inner strand (1), the rubber pad (2) and the outer strand (3), and then tighten the inner strand (1) and the outer strand (3).

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