A tensioner for power transmission lines

Abstract

The present application relates to a tensioner for a power transmission line, and relates to the technical field of tensioners, which comprises a base plate, an adjusting rod and an extrusion rod, one end of the adjusting rod is fixedly provided with an articulated rod, one end of the base plate is provided with a sliding through hole for the articulated rod to be inserted and slide, and the articulated rod can rotate in the sliding through hole; the two ends of the extrusion rod are respectively hinged to the other end of the adjusting rod and the end of the base plate away from the sliding through hole, and the side surface of the base plate is provided with a pull rod hinged to the articulated rod at one end; a tensioning seat is fixedly provided on the side surface of the base plate, a tensioning notch is provided on the tensioning seat, an extrusion plate whose middle part is hinged to the extrusion rod is provided on the side surface of the base plate, and the extrusion plate can rotate into the tensioning notch along with the extrusion rod; an extrusion notch facing the tensioning notch is provided on the extrusion plate, and a fixing tooth is provided on the inner wall of the extrusion notch; in the present application, the tensioning notch and the extrusion notch simultaneously limit the cable, and the fixing tooth presses the cable tightly.

Description

Technical Field

[0001] The present application relates to the technical field of cable tensioners, and in particular to a cable tensioner for power transmission lines. Background Art

[0002] Cable clamps, as a device designed to fix, clamp or support wires, cables and other cables, are of great importance in various occasions that require efficient cable management. They not only ensure the firmness, safety and stability of cables, but also face increasing demand with the rapid development of modern industry, construction and communication technology. This trend has prompted the design and manufacture of cable clamps to evolve towards more efficiency, convenience and durability.

[0003] However, although the existing technology, such as the utility model with publication number CN212497495U, a portable cable clamp, has achieved the improvement of portability and operability to a certain extent, the design includes a support plate, a wire placement platform, two movably connected pressure rods, a first connecting rod, an axial rod in a strip hole, a second connecting rod and a pull rod, etc., the pressure rod clamps the cable by pulling the pull rod.

[0004] However, there are still some problems. Especially in severe weather conditions such as strong winds, the abutment force of the two pressure rods in the existing design against the cables placed on the cable-laying platform may not be sufficient to resist the impact of external strong winds, which may easily lead to loosening or even falling off of the abutment. This may not only interrupt the construction progress, but also pose a safety hazard to on-site workers. There is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a cable tensioner for power transmission lines, so as to solve the problem that the above-mentioned cable clamp is easily affected by strong external winds during use, resulting in loosening of the abutment or even falling off.

[0006] The present application provides a transmission line tightener that adopts the following technical solution:

[0007] A tensioner for a power transmission line comprises a base plate, an adjusting rod and an extrusion rod, wherein a hinge rod is fixedly arranged at one end of the adjusting rod, a sliding through hole is provided at one end of the base plate for the hinge rod to be inserted into and slide, and the hinge rod can rotate in the sliding through hole; the two ends of the extrusion rod are respectively hinged to the other end of the adjusting rod and the end of the base plate away from the sliding through hole, and a pull rod with one end hinged to the hinge rod is provided on the side of the base plate; a tension seat is fixedly arranged on the side of the base plate, a tension notch is provided on the tension seat, an extrusion plate with a middle part hinged to the extrusion rod is provided on the side of the base plate, and the extrusion plate can rotate into the tension notch along with the extrusion rod; an extrusion notch is provided on the extrusion plate facing the tension notch, and fixing teeth are provided on the inner wall of the extrusion notch.

[0008] By adopting the above technical scheme, when clamping the cable, the cable is placed in the tightening gap in advance, and then the pull rod is pulled away from the base plate to drive the adjustment rod and the extrusion rod to rotate. At the same time, the extrusion plate rotates into the tightening gap along with the extrusion rod, and a part of the cable is simultaneously inserted into the extrusion gap on the extrusion plate, so that the fixed teeth on the inner wall of the extrusion gap are pressed against the outer periphery of the cable, thereby fixing the cable in the tightening gap, and the cable is limited synchronously by the tightening gap and the extrusion gap, and the fixed teeth press the cable tightly, thereby enhancing the clamping stability of the cable tensioner on the cable, and reducing the influence of subsequent weather on the cable in the tightened state.

[0009] Optionally, the tensioning seat is symmetrically provided with an arc-shaped limiting block on the bottom side of the tensioning notch, and a plurality of limiting teeth are evenly distributed on the side of the arc-shaped limiting block facing the extrusion plate.

[0010] By adopting the above technical solution, due to the arrangement of the arc-shaped limit block and the limit teeth, the cable in the tightening gap is limited, and the limit teeth simultaneously tighten the cable, thereby further improving the stability and firmness of the tightening device when clamping the cable.

[0011] Optionally, a limit plate located above the tensioning seat is hinged on the side of the base plate through a rotating shaft, a limit notch is provided on the side of the limit plate facing the tensioning notch, and a torsion spring is provided on the outer periphery of the rotating shaft to drive the limit plate to abut against the side of the tensioning seat.

[0012] By adopting the above technical solution, before the cable is clamped, due to the coordinated setting of the limit plate and the torsion spring, the staff can overcome the torque of the torsion spring and reversely rotate the limit plate to place the cable between the limit notch and the tensioning notch. The torsion spring then drives the limit plate to reset, thereby pre-limiting the cable. This can reduce the difficulty of subsequent cable clamping and reduce the possibility of subsequent tensioners and cables loosening or falling off due to strong winds and heavy rains.

[0013] Optionally, an elastic pad is fixedly provided on the side of the limiting plate facing the tensioning seat, and the elastic pad is provided with anti-slip grooves.

[0014] By adopting the above technical solution, when the limit plate abuts against the tension seat, the anti-skid pattern on the elastic pad abuts against the surface of the tension seat, thereby reducing the possibility of damage to the limit plate and the surface of the tension seat due to knocking.

[0015] Optionally, a positioning plug is fixedly provided on the elastic pad, and a positioning slot for inserting the positioning plug is provided on the tensioning seat.

[0016] By adopting the above technical solution, when the elastic pad on the limit plate abuts against the surface of the tensioning seat, due to the matching setting of the positioning block and the positioning slot, the positioning block on the elastic pad is inserted into the positioning slot on the tensioning seat, thereby improving the stability of the limit plate and the tensioning seat when they abut.

[0017] Optionally, a traction rod is hinged on the side of the pull rod, and a positioning block is fixedly provided on the side of the traction rod facing the pull rod, and a guide notch for the positioning block to be inserted and slide is opened on the side of the limit plate away from the base plate; when the pull rod rotates, the positioning block in the guide notch can drive the limit plate to rotate in a direction away from the tensioning seat.

[0018] By adopting the above technical solution, when it is necessary to rotate the limit rod to release the abutment with the tensioning seat, the positioning block on the traction rod can be rotated and inserted into the guide notch on the limit plate, and then the pull rod is rotated away from the traction rod, so that the positioning block in the guide notch drives the limit plate to rotate away from the tensioning seat, thereby releasing the abutment lock between the limit plate and the tensioning seat and improving the convenience of operation.

[0019] Optionally, a clearance notch for rotationally inserting a positioning block is provided on the outer circumference of the pull rod.

[0020] By adopting the above technical solution, when the tensioner is used, the setting of the traction rod may interfere with the fixation of the cable. Due to the setting of the clearance gap on the pull rod, the staff can rotate the traction rod so that the positioning block on the traction rod is rotated and inserted into the clearance gap, thereby storing the traction rod, avoiding the traction rod from interfering with the cable when the tensioner is in use, and improving the performance of the tensioner.

[0021] Optionally, a positioning protrusion is fixedly provided on the positioning block, and a positioning groove for the positioning protrusion to be inserted is formed on the inner wall of the clearance gap.

[0022] By adopting the above technical solution, when the positioning block on the traction rod is rotated and inserted into the clearance gap, the positioning protrusion on the positioning block is inserted into the positioning groove, thereby improving the installation stability of the positioning block in the clearance gap.

[0023] Optionally, a locking through hole is provided on the traction rod, a locking screw hole that can overlap with the locking through hole is provided on the adjustment rod, and a locking bolt that penetrates the locking through hole and is screwed into the locking screw hole is provided on the side of the base plate.

[0024] By adopting the above technical solution, before the tensioner is packed and transported out of the factory, the locking screw hole and the locking through hole can be adjusted to an overlapping state, and the locking bolt is passed through the locking through hole and then screwed into the locking screw hole, so as to relatively fix the adjusting rod and the pull rod, which facilitates the packaging and transportation of the tensioner.

[0025] Optionally, the locking bolt is a butterfly bolt.

[0026] By adopting the above technical solution, since the locking bolt is a butterfly bolt, the staff can directly manually rotate the locking bolt to facilitate fixing the other end of the traction rod on the adjustment rod.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] When clamping the cable, the cable is placed in the tightening notch in advance, and then the pull rod is pulled away from the base plate to drive the adjustment rod and the extrusion rod to rotate. At the same time, the extrusion plate rotates into the tightening notch along with the extrusion rod, and a part of the cable is simultaneously inserted into the extrusion notch on the extrusion plate, so that the fixing teeth on the inner wall of the extrusion notch are pressed against the outer periphery of the cable, thereby fixing the cable in the tightening notch. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 It is a partial structural schematic diagram of the installation and matching of the extrusion plate in the embodiment of the present application;

[0032] Figure 3 It is a partial structural diagram of the installation and coordination of the limit plate in the embodiment of the present application;

[0033] Figure 4 It is a partial cross-sectional structural schematic diagram of the installation and cooperation between the limit plate and the tensioning seat in the embodiment of the present application;

[0034] Figure 5 It is a cross-sectional structural schematic diagram of the installation and matching of the limit plate and the traction rod in the embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of the structure of the embodiment of the present application showing the installation and coordination of the limit plate and the traction rod;

[0036] Figure 7 It is a cross-sectional structural schematic diagram of the installation and matching of the pull rod and the traction rod in the embodiment of the present application;

[0037] Figure 8 yes Figure 7 A magnified schematic diagram of part A;

[0038] Fig. 9 It is a structural schematic diagram of the installation and coordination of the traction rod and the adjustment rod in the embodiment of the present application;

[0039] Fig.10 It is a schematic cross-sectional structure diagram of the installation cooperation of the traction rod and the adjustment rod according to the embodiment of the present application.

[0040] In the figure, 1, base plate; 11, sliding through hole; 12, tensioning seat; 121, tensioning notch; 122, positioning slot; 13, arc-shaped limit block; 131, limit tooth; 2, adjusting rod; 21, hinged rod; 22, locking screw hole; 3, extrusion rod; 4, pull rod; 41, yielding notch; 411, positioning groove; 5, extrusion plate; 51, extrusion notch; 52, fixed tooth; 6, limit plate; 61, limit notch; 62, rotating shaft; 63, guide notch; 7, elastic pad; 71, positioning plug; 8, traction rod; 81, positioning block; 82, positioning protrusion; 83, locking through hole; 9, locking bolt. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with all the accompanying drawings. Example

[0042] Reference Figure 1 and Figure 2 A tensioner for a power transmission line comprises a base plate 1, an adjusting rod 2 and an extruding rod 3, one end of the adjusting rod 2 is fixedly provided with an articulated rod 21, one end of the base plate 1 is provided with a sliding through hole 11 for the articulated rod 21 to be inserted and slided, and the articulated rod 21 can rotate in the sliding through hole 11; both ends of the extruding rod 3 are respectively hinged to the other end of the adjusting rod 2 and the end of the base plate 1 away from the sliding through hole 11, and a pull rod 4 is provided on the side of the base plate 1, one end of which is hinged to the articulated rod 21;

[0043] A tightening wire seat 12 is integrally formed on the side of the base plate 1, and a tightening wire notch 121 is provided on the tightening wire seat 12. An extrusion plate 5 is provided on the side of the base plate 1, and the middle part of the extrusion rod 3 is hingedly connected. The extrusion plate 5 is provided with an extrusion notch 51 facing the tightening wire notch 121, and a fixing tooth 52 is formed on the inner wall of the extrusion notch 51. The tightening wire seat 12 is symmetrically fixed with an arc-shaped limit block 13 on the bottom side of the tightening wire notch 121, and a plurality of limit teeth 131 are evenly distributed on the side of the arc-shaped limit block 13 facing the extrusion plate 5.

[0044] When the pull rod 4 is pulled, the hinge rod 21 can be driven to slide back and forth along the length direction of the sliding through hole 11, thereby controlling the rotation of the extrusion rod 3; when the cable is clamped, the cable is placed in the tightening notch 121 in advance, and then the pull rod 4 is pulled away from the substrate 1, driving the adjustment rod 2 and the extrusion rod 3 to rotate, and at the same time, the extrusion plate 5 rotates with the extrusion rod 3 into the tightening notch 121, so that the fixed teeth 52 on the inner wall of the extrusion notch 51 and the limiting teeth 131 on the arc-shaped limiting block 13 are both pressed against the outer periphery of the cable.

[0045] Reference Figure 3 and Figure 4 , a limiting plate 6 located above the tensioning seat 12 is hingedly connected to the side of the base plate 1 through a rotating shaft 62, wherein a limiting notch 61 is provided on the side of the limiting plate 6 facing the tensioning notch 121, and a torsion spring (not shown in the figure) is arranged on the outer periphery of the rotating shaft 62; after the torsion spring and the limiting plate 6 are installed, a torque force can be provided to drive the limiting plate 6 to press against the surface of the tensioning seat 12;

[0046] Before the cable is clamped, the limit plate 6 can be rotated in the opposite direction to overcome the torsion force of the torsion spring, and the cable is placed between the limit notch 61 and the tensioning notch 121. The torsion spring then drives the limit plate 6 to reset, thereby pre-limiting the cable, reducing the difficulty of subsequent cable clamping, and also reducing the possibility of the subsequent tensioner and cable falling off due to external environmental factors (strong wind and heavy rain).

[0047] Reference Figure 4 and Figure 5 An elastic pad 7 made of rubber is glued to the side of the limit plate 6 facing the tensioning seat 12 by glue, and anti-slip grooves are formed on the elastic pad 7; a positioning block 71 is integrally injection-molded on the elastic pad 7, and a positioning slot 122 for inserting the positioning block 71 is opened on the tensioning seat 12; when the limit plate 6 abuts against the tensioning seat 12, the elastic pad 7 abuts against the surface of the tensioning seat 12, and the positioning block 71 is inserted into the positioning slot 122 on the tensioning seat 12.

[0048] Reference Figure 5 and Figure 6 A traction rod 8 is hingedly connected to the side of the pull rod 4, wherein a positioning block 81 is fixedly arranged on the side of the traction rod 8 facing the pull rod 4, and a guide notch 63 for the positioning block 81 to be inserted and slided is provided on the side of the limit plate 6 away from the base plate 1;

[0049] The positioning block 81 on the traction rod 8 can be rotated and inserted into the guide notch 63 on the limit plate 6, and then the pull rod 4 is rotated away from the traction rod 8, so that the positioning block 81 in the guide notch 63 drives the limit plate 6 to rotate away from the tensioning seat 12, thereby releasing the abutment lock between the limit plate 6 and the tensioning seat 12, making it easier to put in or take out the cable.

[0050] Reference Figure 6 , Figure 7 and Figure 8 The positioning block 81 is fixed with a positioning protrusion 82, wherein the positioning protrusion 82 is made of rubber and has elastic deformation performance, and the outer side surface of the positioning protrusion 82 is an arc surface, and the arc length corresponding to the arc surface is a minor arc, and at the same time, a clearance notch 41 for the positioning block 81 to be rotated and inserted is provided on the outer periphery of the pull rod 4, and a positioning groove 411 for the positioning protrusion 82 to be inserted is provided on the inner wall of the clearance notch 41;

[0051] When the tensioner is in use, there is no need for the traction rod 8 to drive the limit plate 6 to rotate. At this time, the traction rod 8 can be rotated to rotate the positioning block 81 on the traction rod 8 and insert it into the clearance gap 41, and then the positioning protrusion 82 is inserted into the positioning groove 411, so as to store the traction rod 8 and prevent the traction rod 8 from interfering with the cable when the tensioner is in use.

[0052] Reference Fig. 9 and Fig.10 A locking through hole 83 is provided on the traction rod 8, wherein a locking screw hole 22 is provided on the adjustment rod 2; a locking bolt 9 is provided on the side of the base plate 1, and the locking bolt 9 is a butterfly bolt, and the staff can directly manually rotate the locking bolt 9;

[0053] When the pull rod 4 is rotated to the extreme position towards the adjusting rod 2, the traction rod 8 is rotated again to make the locking screw hole 22 coincide with the locking through hole 83. At this time, the locking bolt 9 can be passed through the locking through hole 83 and then screwed into the locking screw hole 22, so as to relatively fix the adjusting rod 2 and the pull rod 4, which is convenient for the packaging and transportation of the tensioner.

[0054] The implementation principle of the embodiment of the present application is:

[0055] Before the cable is clamped, the positioning block 81 on the traction rod 8 is rotated and inserted into the guide notch 63 on the limit plate 6, and then the torsion force of the torsion spring is overcome to rotate the pull rod 4 in the direction away from the traction rod 8, so that the positioning block 81 in the guide notch 63 drives the limit plate 6 to rotate in the direction away from the tensioning seat 12, and then the limit plate 6 and the tensioning seat 12 are separated, and the cable is placed between the limit notch 61 and the tensioning notch 121, and then the torsion spring drives the limit plate 6 to reset, thereby pre-limiting the cable;

[0056] Then, the pull rod 4 is pulled away from the base plate 1, driving the adjusting rod 2 and the extruding rod 3 to rotate, and at the same time, the extruding plate 5 rotates into the tightening notch 121 along with the extruding rod 3, so that the fixed teeth 52 on the inner wall of the extruding notch 51 and the limiting teeth 131 on the arc-shaped limiting block 13 are both pressed against the outer periphery of the cable;

[0057] Finally, the traction rod 8 is rotated to rotate the positioning block 81 on the traction rod 8 and insert it into the clearance gap 41, and then the positioning protrusion 82 is inserted into the positioning groove 411, and the traction rod 8 is rotated and stored to prevent the traction rod 8 from interfering with the cable when the tensioner is used.

[0058] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tensioner for a power transmission line, comprising a base plate (1), an adjusting rod (2) and an extruding rod (3); a hinge rod (21) is fixedly arranged at one end of the adjusting rod (2); a sliding through hole (11) is provided at one end of the base plate (1) for the hinge rod (21) to be inserted and slide, and the hinge rod (21) can rotate in the sliding through hole (11); two ends of the extruding rod (3) are respectively hinged to the other end of the adjusting rod (2) and the end of the base plate (1) away from the sliding through hole (11); a pull rod (4) is provided on the side of the base plate (1) with one end hinged to the hinge rod (21); It is characterized in that A tightening seat (12) is fixedly provided on the side of the base plate (1), a tightening notch (121) is provided on the tightening seat (12), a squeezing plate (5) whose middle part is hinged to the squeezing rod (3) is provided on the side of the base plate (1), and the squeezing plate (5) can rotate into the tightening notch (121) along with the squeezing rod (3); an squeezing notch (51) facing the tightening notch (121) is provided on the squeezing plate (5), and a fixing tooth (52) is provided on the inner wall of the squeezing notch (51); A limiting plate (6) located above the tensioning seat (12) is hingedly connected to the side surface of the base plate (1) via a rotating shaft (62); a limiting notch (61) is provided on the side surface of the limiting plate (6) facing the tensioning notch (121); and a torsion spring is provided on the outer periphery of the rotating shaft (62) to drive the limiting plate (6) to abut against the side surface of the tensioning seat (12); A traction rod (8) is hingedly connected to the side of the pull rod (4); a positioning block (81) is fixedly provided on the side of the traction rod (8) facing the pull rod (4); a guide notch (63) for the positioning block (81) to be inserted and slide is provided on the side of the limit plate (6) away from the base plate (1); when the pull rod (4) rotates, the positioning block (81) in the guide notch (63) can drive the limit plate (6) to rotate in a direction away from the tensioning seat (12); The outer circumference of the pull rod (4) is provided with a clearance notch (41) for the positioning block (81) to be rotatably inserted; the positioning block (81) is fixedly provided with a positioning protrusion (82), and the inner wall of the clearance notch (41) is provided with a positioning groove (411) for the positioning protrusion (82) to be inserted; the traction rod (8) is provided with a locking through hole (83), the adjustment rod (2) is provided with a locking screw hole (22) that can overlap with the locking through hole (83), and the side surface of the base plate (1) is provided with a locking bolt (9) that passes through the locking through hole (83) and is screwed into the locking screw hole (22).

2. A power transmission line tensioner according to claim 1, characterized in that: The tensioning seat (12) is symmetrically provided with an arc-shaped limiting block (13) at the bottom side of the tensioning notch (121), and a plurality of limiting teeth (131) are evenly distributed on the side of the arc-shaped limiting block (13) facing the extrusion plate (5).

3. A power transmission line tensioner according to claim 1, characterized in that: An elastic pad (7) is fixedly provided on the side of the limiting plate (6) facing the tensioning seat (12), and the elastic pad (7) is provided with anti-slip grooves.

4. A power transmission line tensioner according to claim 3, characterized in that: A positioning plug block (71) is fixedly arranged on the elastic pad (7), and a positioning slot (122) for inserting the positioning plug block (71) is provided on the tensioning seat (12).

5. A power transmission line tensioner according to claim 1, characterized in that: The locking bolt (9) is a butterfly bolt.

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