Anchoring wire clamp

Abstract

The invention relates to the technical field of power transmission line cable fixing and connecting fittings, in particular to an anchoring wire clamp. Comprising an anchoring wedge-shaped core and a wire clamp body, the wire clamp body is provided with a wire clamp cavity along the axial direction, and the bottom wall of the wire clamp cavity is provided with a wedge-shaped core clamping groove with an inclined surface; the anchoring wedge-shaped core is arranged in the wedge-shaped core clamping groove, and the anchoring wedge-shaped core and the top wall of the wire clamp cavity define a clamping space used for clamping the composite core. According to the anchoring wire clamp, through the unique design of the anchoring wedge-shaped core and the wire clamp body and the arrangement of the anti-loosening structure, the anchoring wedge-shaped core can be effectively prevented from loosening and is not prone to displacement or falling off, it is ensured that in the wire stress or long-term operation process, anchoring of the wire clamp on an overhead wire is stable and reliable, and the safety of a power transmission line is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fixed connection hardware for power transmission line cables, in particular to an anchoring wire clamp. Background Art

[0002] In power transmission lines, wire clamps play a vital role. They are used to fix the conductors, bear the conductor tension, and hang the conductors on the tension string or pole tower. The existing bending-resistant steel-clad composite core overhead conductors include an internal steel-clad composite core and an external aluminum conductor layer. The steel-clad composite core is composed of multiple steel-clad composite single cores twisted together, with high strength and good conductivity; the aluminum conductor layer is twisted outside the steel-clad composite core as the main conductive material, responsible for transmitting current.

[0003] However, there are some problems with existing tension clamps when used with bending-resistant steel-clad composite core overhead conductors. For example, when the conductor is stressed or in long-term operation, the clamp may become loose due to vibration caused by external forces, resulting in unstable conductor connection and affecting power transmission safety.

[0004] Therefore, it is necessary to design an anchor clamp for clamping steel-clad composite core overhead conductors. Summary of the invention

[0005] The purpose of the present invention is to provide an anchoring wire clamp for clamping the end of an overhead wire, so that the overhead wire can be used stably during use and the safety and reliability of the line can be improved.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: an anchoring wire clamp, comprising: an anchoring wedge-shaped core and a wire clamp body;

[0007] The wire clamp body is provided with a wire clamp cavity along the axial direction, and the bottom wall of the wire clamp cavity is provided with a wedge-shaped core slot with an inclined surface; the anchoring wedge-shaped core is arranged in the wedge-shaped core slot, and the anchoring wedge-shaped core and the top wall of the wire clamp cavity enclose a clamping space for clamping the composite core.

[0008] Furthermore, it also includes an inner layer of pre-twisted wires, which are wound around the aluminum conductor layer of the overhead conductor and the outside of the wire clamp body.

[0009] Furthermore, it also includes an anti-loosening structure; the anti-loosening structure is arranged between the anchoring wedge-shaped core and the wedge-shaped core slot, and the anchoring wedge-shaped core and the wedge-shaped core slot are locked by the anti-loosening structure.

[0010] Furthermore, the anti-loosening structure includes a self-locking slider and a step structure;

[0011] A plurality of guide grooves extending vertically are arranged on one side of the anchor wedge core close to the wedge core slot, and a self-locking slider is slidably connected in each guide groove; the self-locking slider has a downward movement tendency under the action of its own gravity;

[0012] A groove is provided on the inclined surface of the wedge core clamping groove, and a step structure is provided in the groove along the moving direction of the anchoring wedge core; the cross section of the step structure is sawtooth-shaped;

[0013] When the anchoring wedge core moves upward, the lower end of the self-locking slider is pressed on the step structure and slides along the outer surface of the step structure; when the anchoring wedge core stops moving, the lower end of the self-locking slider is clamped on the outer surface of the step structure.

[0014] Furthermore, a pushing structure is also provided at the tail of the wire clamp body; the pushing structure includes a support plate and a clamping bolt fixed to the tail of the wire clamp body, the support plate is provided with a threaded hole, and the clamping bolt is threadedly connected to the support plate; the end of the clamping bolt abuts against the tail of the anchor wedge core, and by tightening the clamping bolt, the end of the clamping bolt pushes the anchor wedge core to move forward.

[0015] Furthermore, an upper and lower pressing plates are arranged at the tail of the anchoring wedge-shaped core; a groove is provided between the upper and lower pressing plates for placing the composite core.

[0016] Furthermore, a connecting rod is hinged on the side of the wire clamp body, and the connecting rod is used to be fixedly connected to the tension tower; an insulating device is installed between the connecting rod and the tension tower.

[0017] Furthermore, the end of the inner layer pre-twisted wire is provided with a connector, and the connector is used for fixed connection with the tension tower.

[0018] Furthermore, it also includes an outer layer of pre-twisted wires; the outer layer of pre-twisted wires are wound around the outside of the inner layer of pre-twisted wires.

[0019] Furthermore, the upper surface of the anchoring wedge core is provided with a semicircular groove arranged in the horizontal direction and opened along the length direction of the anchoring wedge core; the corresponding top wall of the wire clamp cavity is also provided with a semicircular groove, and the composite core is clamped between the two semicircular grooves.

[0020] Beneficial effects:

[0021] The present invention locks the position of the anchor wedge core by clamping the self-locking slider of the anti-loosening structure on the step structure under the action of gravity, preventing the anchor wedge core from loosening during use; ensuring that the wire clamp anchors the overhead wire stably and reliably when the wire is stressed or in long-term operation, thereby greatly improving the safety of the transmission line.

[0022] The push structure of the present invention can accurately control the clamping force of the anchor wedge core on the composite core by tightening the clamping bolt. It can be adjusted to a suitable clamping degree according to different working conditions and wire requirements, which not only ensures the stable connection of the wire, but also avoids damage to the wire due to excessive clamping force, thereby extending the service life of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the exploded structure of the anchoring wire clamp disclosed in the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the anchor wire clamp after assembly disclosed in the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of the wire clamp body and the anchor wedge core of the anchor wire clamp disclosed in the present invention;

[0027] Figure 4 is a cross-sectional view of the anchoring wire clamp disclosed in the present invention;

[0028] Figure 5 It is a schematic structural diagram of an anchoring wire clamp with an inner layer of pre-twisted wire disclosed by the present invention.

[0029] In the figure:

[0030] 1. Anchoring wedge core; 2. Wire clamp body; 3. Wedge core slot; 4. Inner pre-twisted wire; 5. Self-locking slider; 6. Step structure; 7. Support plate; 8. Clamping bolt; 9. Upper and lower pressure plates; 10. Connecting rod; 11. Guide groove; 12. Composite core; 13. Aluminum conductor layer. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] To achieve the above object, the present invention provides the following technical solutions: Figure 1-5As shown, an anchoring wire clamp, the overhead wire comprises an internal composite core 12 and an external aluminum wire layer 13; the present invention is used to clamp the end of the overhead wire, firmly fix the overhead wire on the tension tower, ensure the stable use of the overhead wire in use,

[0033] The anchoring wire clamp comprises: an anchoring wedge-shaped core 1, a wire clamp body 2 and an inner layer pre-twisted wire 4;

[0034] The outside of the wire clamp body 2 is cylindrical; the wire clamp body 2 is provided with a wire clamp cavity along the axial direction, and the bottom wall of the wire clamp cavity is provided with a wedge-shaped core slot 3 with an inclined surface; the anchoring wedge-shaped core 1 is arranged in the wedge-shaped core slot 3, and the anchoring wedge-shaped core 1 and the top wall of the wire clamp cavity enclose a clamping space for clamping the composite core.

[0035] The wedge-shaped core slot 3 is a slot structure with an inclined surface; the anchoring wedge-shaped core 1 is a wedge-shaped structure; the lower surface of the anchoring wedge-shaped core 1 is an inclined surface, and the inclination of the inclined surface of the wedge-shaped core slot 3 matches; the anchoring wedge-shaped core 1 slides along the wedge-shaped core slot 3 at the lower part of the wire clamp cavity; the upper surface of the anchoring wedge-shaped core 1 is parallel to the composite core 12 of the overhead conductor and the top wall of the wire clamp cavity;

[0036] The inner layer pre-twisted wire 4 is wound around the aluminum conductor layer 13 of the overhead conductor of the bending-resistant composite core 12 and the outside of the wire clamp body 2 .

[0037] The upper surface of the anchor wedge-shaped core 1 is provided with a semicircular groove arranged in the horizontal direction; the corresponding top wall of the wire clamp cavity is also provided with a semicircular groove, and the composite core 12 is clamped between the two semicircular grooves.

[0038] Furthermore, it also includes an anti-loosening structure, which is arranged between the anchoring wedge-shaped core 1 and the wedge-shaped core slot 3. The anchoring wedge-shaped core 1 and the wedge-shaped core slot 3 are locked by the anti-loosening structure to prevent the anchoring wedge-shaped core 1 from loosening.

[0039] Furthermore, the anti-loosening structure includes a self-locking slider 5 and a stepped structure 6; a plurality of guide grooves 11 extending vertically are provided on one side of the anchor wedge core 1 close to the wedge core slot, and a self-locking slider 5 is slidably connected in each guide groove 11; the depth of the guide groove 11 is greater than the length of the self-locking slider 5; the self-locking slider 5 has a tendency to move downward under the action of its own gravity; there are two self-locking sliders 5 in this embodiment;

[0040] The lower end of the self-locking slider 5 is a wedge-shaped structure; initially, the lower end of the self-locking slider 5 is pressed on the inclined surface of the wedge-shaped core slot 3, and slides along the inclined surface of the wedge-shaped core slot 3 together with the anchoring wedge-shaped core 1;

[0041] A groove is provided on the inclined surface of the corresponding wedge core slot 3, and a step structure 6 is provided in the groove along the movement direction of the anchor wedge core 1; the cross section of the step structure 6 is serrated; the step structure 6 includes a plurality of serrated steps; a plurality of serrated clamping grooves are formed between the serrated steps; one of the two side surfaces of the clamping groove is in the vertical direction for clamping the lower end of the self-locking slider 5, and the other side surface is an inclined surface, when the self-locking slider 5 slides upward along the inclined surface of the wedge core slot 3 together with the anchor wedge core 1; the setting of the inclined surface will not prevent the self-locking slider 5 from moving forward, and the lower end of the self-locking slider 5 will continue to move forward along the slope of the inclined surface until the anchor wedge core 1 clamps the composite core 12, and the self-locking slider 5 falls into the clamping groove and is clamped on the vertical side wall of the clamping groove.

[0042] It should be noted that the width of the groove is smaller than the width of the lower surface of the anchoring wedge core 1 and larger than the width of the self-locking slider 5. The effect of such a setting is that the anchoring wedge core 1 can slide along the inclined surface of the wedge core slot 3 without interfering with the step structure 6, and the self-locking slider 5 can fall downward into the step structure 6 and be clamped on the serrated steps of the step structure 6; the height of the step structure 6 does not exceed the inclined surface of the wedge core slot 3, so as to prevent interference with the sliding of the anchoring wedge core 1;

[0043] When the self-locking slider 5 of the anchoring wedge core 1 moves to the top of the step structure 6 and stops moving, the self-locking slider 5 falls between the serrated steps of the step structure 6 under the action of gravity; and is clamped on the side wall of the serrated step, thereby locking the anchoring wedge core 1 and preventing the anchoring wedge core 1 from moving backward and loosening.

[0044] Furthermore, a pushing structure is further provided at the tail of the wire clamp body 2; the pushing structure comprises a support plate 7 and a clamping bolt 8 fixed to the tail of the wire clamp body 2, a threaded hole is provided on the support plate 7, and the middle part of the clamping bolt 8 is threadedly connected to the support plate 7 through the threaded hole; further, an anti-loosening gasket is provided between the support plate 7 and the clamping bolt 8;

[0045] The end of the clamping bolt 8 abuts against the tail of the anchoring wedge core 1. The anchoring wedge core 1 is squeezed by tightening the clamping bolt 8, so that the anchoring wedge core 1 and the wire clamp body 2 produce relative movement. The anchoring wedge core 1 moves upward along the wedge core slot 3 and gradually approaches the top wall of the wire clamp cavity to clamp the composite core 12. The pushing structure can provide thrust to enable the anchoring wire clamp to complete the clamping action. At the same time, it can also further prevent the anchoring wedge core 1 from loosening when subjected to external force or vibration.

[0046] When in working state, the anchoring wedge core 1 moves forward along the inclined surface of the wedge core slot 3 under the pressure of the clamping bolt 8, and presses the composite core 12 of the overhead conductor. At the same time, the wedge-shaped structure head of the anchoring wedge core 1 moves to above the step structure 6 provided on the wedge core slot 3, and the first self-locking slider 5 falls into the clamping groove of the step structure 6 under the action of gravity. If the pressure on the composite core 12 is not up to standard at this time, the anchoring wedge core 1 continues to be pushed to make the second self-locking slider 5 fall until the pressure on the composite core 12 is qualified; at this time, the two self-locking sliders 5 fall into the clamping groove to lock the anchoring wedge core 1 in position; it should be noted that the spacing between the two self-locking sliders 5 in this embodiment is the same as the spacing between the clamping grooves on the step structure 6, which can ensure that both self-locking sliders 5 can fall into the clamping groove; the purpose is to improve the strength of the anti-loosening structure, and two self-locking sliders 5 are subjected to force at the same time.

[0047] Furthermore, a connecting piece is provided at the tail of the anchoring wedge-shaped core 1 to be fixedly connected to the composite core 12, and the connecting piece is an upper and lower pressure plate 9 and a bolt; a circular groove is provided between the upper and lower pressure plates 9 for placing the composite core 12, and the composite core 12 is pressed between the upper and lower pressure plates 9 by tightening the screw, so that the composite core 12 and the tail of the anchoring wedge-shaped core 1 are fixedly connected.

[0048] Furthermore, a connecting rod 10 is hingedly provided on the side of the wire clamp body 2, and the connecting rod 10 is used for fixed connection with the tension tower; it should be noted that an insulating device needs to be installed between the connecting rod 10 and the tension tower.

[0049] Furthermore, the inner layer pre-twisted wire 4 is a pre-twisted wire with a connector at one end as an auxiliary tensioning structure; it can be fixedly connected to the tension tower through the connector, and the connector adopts an existing structure;

[0050] Since the aluminum conductor layer 13 on the outside of the overhead conductor is used to transmit current, the inner pre-twisted wire 4 needs to be connected to the insulation device first when connected to the outside through the connector, and then fixedly connected to the tension tower through the insulation device.

[0051] Furthermore, it also includes an outer layer of pre-twisted wires; the outer layer of pre-twisted wires are wound around the inner layer of pre-twisted wires 4 to further reinforce the interior; the outer layer of pre-twisted wires are not drawn in the figure.

[0052] Furthermore, the anchor wedge core 1 and the wire clamp body 2 are both made of carbon fiber composite materials, and the carbon fiber composite materials include at least one of high temperature fiber, fireproof fiber and cold-resistant fiber. The carbon fiber composite materials have the advantages of high corrosion resistance and strength, and can improve the durability of the anchor wedge core 1 and the wire clamp body 2.

[0053] Working principle:

[0054] When installing the anchoring wire clamp, first peel off a section of the aluminum conductor layer 13 at the end of the overhead wire to expose the composite core 12 in the middle. Put the wire clamp body 2 on the composite core 12 so that the composite core 12 can enter the wire clamp cavity, and ensure that its position is appropriate and can cooperate with the anchoring wedge core 1 that is subsequently placed. Then put the anchoring wedge core 1 into the wedge core slot 3 inside the wire clamp body 2, and the inclined surface of the anchoring wedge core 1 fits with the inclined surface of the wedge core slot 3.

[0055] Next, by tightening the clamp bolt 8 in the rear push structure of the wire clamp body 2, the top end of the clamp bolt 8 applies thrust to the rear end of the anchor wedge core 1 by using the principle of thread transmission. Due to the cooperation between the anchor wedge core 1 and the inclined surface of the wedge core slot 3, the anchor wedge core 1 moves upward along the wedge core slot 3 under the action of thrust. As the anchor wedge core 1 rises, the distance between its upper surface and the top wall of the wire clamp cavity gradually decreases, which produces an extrusion effect on the composite core 12 located between the two, and clamps the composite core 12.

[0056] In this process, the self-locking slider 5 in the guide groove 11 on the lower surface of the anchor wedge core 1 also moves with the anchor wedge core 1. When the self-locking slider 5 moves to the top of the step structure 6, the first self-locking slider 5 falls into the clamping groove of the step structure 6 under the action of gravity and is clamped on the vertical side wall of the clamping groove. At this time, if the clamping force on the composite core 12 is not enough, continue to push the anchor wedge core 1, and the subsequent self-locking sliders 5 will fall one by one until the appropriate clamping force is reached. Multiple self-locking sliders 5 all fall into the clamping groove, locking the anchor wedge core 1 in this position to prevent it from moving backward, thereby achieving reliable clamping of the composite core 12.

[0057] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An anchoring clamp for installation on a composite core of an overhead conductor, characterized in that: include: Anchoring the wedge-shaped core (1) and the wire clamp body (2); The wire clamp body (2) is provided with a wire clamp cavity along the axial direction, and the bottom wall of the wire clamp cavity is provided with a wedge-shaped core clamping groove (3) with an inclined surface; the anchoring wedge-shaped core (1) is arranged in the wedge-shaped core clamping groove (3), and the anchoring wedge-shaped core (1) and the top wall of the wire clamp cavity enclose a clamping space for clamping the composite core.

2. The anchoring clip according to claim 1, characterized in that: It also comprises an inner layer of pre-twisted wires (4), wherein the inner layer of pre-twisted wires (4) are wound around the aluminum wire layer (13) of the overhead wire and the outside of the wire clamp body (2).

3. The anchoring clip according to claim 1, characterized in that: It also comprises an anti-loosening structure; the anti-loosening structure is arranged between the anchoring wedge-shaped core (1) and the wedge-shaped core slot (3), and the anchoring wedge-shaped core (1) and the wedge-shaped core slot (3) are locked by the anti-loosening structure.

4. The anchoring clip according to claim 3, characterized in that: The anti-loosening structure comprises a self-locking slider (5) and a step structure (6); A plurality of guide grooves (11) extending vertically are arranged on one side of the anchor wedge core (1) close to the wedge core clamping groove (3), and a self-locking slider (5) is slidably connected in each guide groove (11); the self-locking slider (5) has a downward movement tendency under the action of its own weight; A groove is provided on the inclined surface of the wedge-shaped core slot (3), and a step structure (6) is provided in the groove along the movement direction of the anchoring wedge-shaped core (1); the cross section of the step structure (6) is sawtooth-shaped; When the anchoring wedge-shaped core (1) moves upward, the lower end of the self-locking slider (5) is pressed onto the step structure (6) and slides along the outer surface of the step structure (6); when the anchoring wedge-shaped core (1) stops moving, the lower end of the self-locking slider (5) is clamped onto the outer surface of the step structure (6).

5. The anchoring clip according to claim 1, characterized in that: The rear part of the wire clamp body (2) is also provided with a pushing structure; the pushing structure comprises a support plate (7) and a clamping bolt (8) fixed to the rear part of the wire clamp body (2); the support plate (7) is provided with a threaded hole, and the clamping bolt (8) is threadedly connected to the support plate (7); the end of the clamping bolt (8) abuts against the rear part of the anchor wedge core (1); by tightening the clamping bolt (8), the end of the clamping bolt (8) pushes the anchor wedge core (1) to move forward.

6. The anchoring clip according to claim 1, characterized in that: The tail of the anchoring wedge-shaped core (1) is provided with upper and lower pressing plates (9); a groove is provided between the upper and lower pressing plates (9) for placing the composite core (12).

7. The anchoring clip according to claim 1, characterized in that: A connecting rod (10) is hingedly connected to the side of the wire clamp body (2), and the connecting rod (10) is used for fixed connection with the tension tower; an insulating device is installed between the connecting rod (10) and the tension tower.

8. The anchoring clip according to claim 2, characterized in that: The end of the inner layer pre-twisted wire (4) is provided with a connecting piece, and the connecting piece is used for fixed connection with the tension tower.

9. The anchoring clip according to claim 2, characterized in that: It also includes an outer layer of pre-twisted wires; the outer layer of pre-twisted wires are wound around the outside of the inner layer of pre-twisted wires (4).

10. The anchoring clip according to claim 1, characterized in that: The upper surface of the anchor wedge core (1) is provided with a semicircular groove arranged in the horizontal direction and opened along the length direction of the anchor wedge core (1); the top wall of the corresponding wire clamp cavity is also provided with a semicircular groove, and the composite core (12) is clamped between the two semicircular grooves.

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