Anchoring clip

Abstract

This invention relates to the field of cable fixing and connection hardware for power transmission lines, specifically an anchoring clamp. It includes an anchoring wedge core and a clamp body. The clamp body has an axially oriented clamp cavity, and the bottom wall of the clamp cavity has a wedge-shaped core slot with an inclined surface. The anchoring wedge core is disposed within the wedge-shaped core slot, and the anchoring wedge core and the top wall of the clamp cavity form a clamping space for holding a composite core. Through its unique anchoring wedge core and clamp body design, as well as the anti-loosening structure, the anchoring clamp of this invention effectively prevents the anchoring wedge core from loosening, making it less prone to displacement or detachment. This ensures stable and reliable anchoring of the clamp to the overhead conductor during conductor stress or long-term operation, thus improving the safety of the power transmission line.

Description

Technical Field

[0001] This invention relates to the field of fixed connection hardware for power transmission line cables, specifically an anchoring clamp. Background Technology

[0002] In power transmission lines, clamps play a crucial role, securing conductors, bearing conductor tension, and attaching them to tension strings or towers. Existing bend-resistant steel-clad composite core overhead conductors consist of an inner steel-clad composite core and an outer aluminum conductor layer. The steel-clad composite core is composed of multiple strands of multi-core steel-clad composite material, possessing high strength and good conductivity; the aluminum conductor layer, as the primary conductive material, is stranded around the steel-clad composite core and is responsible for transmitting current.

[0003] However, existing tension clamps have some problems when used with bending-resistant steel-clad composite core overhead conductors. For example, during conductor stress or long-term operation, the clamps may loosen due to vibration caused by external forces, leading to unstable conductor connections and affecting power transmission safety.

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

[0005] The purpose of this invention is to provide an anchoring clamp for holding the end of an overhead conductor, ensuring stable use of the conductor and improving the safety and reliability of the line. This effectively solves the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an anchoring clamp, comprising: an anchoring wedge core and a clamp body;

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

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

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

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

[0011] The anchoring wedge core has multiple vertically extending guide grooves on the side near 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 its own gravity.

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

[0013] When the anchoring wedge moves upward, the lower end of the self-locking slider presses against the stepped structure and slides along the outer surface of the stepped structure; when the anchoring wedge stops moving, the lower end of the self-locking slider engages with the outer surface of the stepped structure.

[0014] Furthermore, the tail of the clamp body is provided with a pushing structure; the pushing structure includes a support plate and a clamping bolt fixed to the tail of the 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 anchoring wedge core, and by tightening the clamping bolt, the end of the clamping bolt pushes the anchoring wedge core forward.

[0015] Furthermore, the tail end of the anchoring wedge core is provided with upper and lower pressure plates; a groove is provided between the upper and lower pressure plates for placing the composite core.

[0016] Furthermore, a connecting rod is hinged to the side of the clamp body, and the connecting rod is used for fixed connection with the tension tower; an insulation device is installed between the connecting rod and the tension tower.

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

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

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

[0020] Beneficial effects:

[0021] This invention uses a self-locking slider with an anti-loosening structure to engage with a stepped structure under gravity, which locks the position of the anchoring wedge core and prevents it from loosening during use. This ensures that the clamp provides stable and reliable anchoring to the overhead conductor during conductor stress or long-term operation, greatly improving the safety of transmission lines.

[0022] The pushing structure of this invention can precisely control the clamping force of the anchor wedge core on the composite core by tightening the clamping bolts. It can be adjusted to a suitable clamping degree according to different working conditions and wire requirements, which not only ensures a stable connection of the wire, but also avoids damage to the wire due to excessive clamping force, thus extending the service life of the wire. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is an exploded structural diagram of the anchor clamp disclosed in this invention;

[0025] Figure 2 This is a schematic diagram of the assembled structure of the anchor clamp disclosed in this invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the anchor clamp body and the anchor wedge core of the anchor clamp disclosed in this invention.

[0027] Figure 4 This is a cross-sectional view of the anchor clamp disclosed in this invention;

[0028] Figure 5 This is a schematic diagram of the anchor clamp with an inner pre-twisted wire disclosed in this invention.

[0029] In the picture:

[0030] 1. Anchoring wedge core; 2. Wire clamp body; 3. Wedge core slot; 4. Inner layer pre-twisted wire; 5. Self-locking slider; 6. Stepped 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 Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To achieve the above objectives, the present invention provides the following technical solutions, such as... Figure 1-5As shown, an anchoring clamp is provided, comprising an inner composite core 12 and an outer aluminum conductor layer 13 for an overhead conductor. This invention is used to clamp the ends of an overhead conductor, securely fixing it to a tension tower, ensuring stable operation of the overhead conductor during use.

[0033] The anchor clamp includes: an anchor wedge core 1, a clamp body 2, and an inner pre-twisted wire 4;

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

[0035] The wedge-shaped core slot 3 is a groove 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 its inclination matches that of the inclined surface of the wedge-shaped core slot 3; the anchoring wedge-shaped core 1 slides along the wedge-shaped core slot 3 at the bottom of the 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 clamp cavity;

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

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

[0038] Furthermore, it also includes an anti-loosening structure, which is set between the anchoring wedge core 1 and the wedge core groove 3. The anti-loosening structure locks the anchoring wedge core 1 and the wedge core groove 3 to prevent the anchoring wedge core 1 from loosening.

[0039] Furthermore, the anti-loosening structure includes a self-locking slider 5 and a stepped structure 6; multiple vertically extending guide grooves 11 are provided on the side of the anchoring wedge core 1 near 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 its own weight; in this embodiment, there are two self-locking sliders 5;

[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 against the inclined surface of the wedge-shaped core groove 3, and slides along the inclined surface of the wedge-shaped core groove 3 together with the anchored wedge-shaped core 1.

[0041] The corresponding wedge-shaped core slot 3 has a groove on its inclined surface, and a stepped structure 6 is provided in the groove along the movement direction of the anchoring wedge-shaped core 1. The stepped structure 6 has a serrated cross section and includes multiple serrated steps. Multiple serrated locking grooves are formed between the serrated steps. One side of the locking groove is vertical and used to lock the lower end of the self-locking slider 5. The other side is inclined. When the self-locking slider 5 slides upward along the inclined surface of the wedge-shaped core slot 3 together with the anchoring wedge-shaped core 1, the inclined surface will not prevent the self-locking slider 5 from moving forward. The lower end of the self-locking slider 5 will continue to move forward along the slope of the inclined surface until the anchoring wedge-shaped core 1 clamps the composite core 12. The self-locking slider 5 falls into the locking groove and locks onto the vertical side wall of the locking 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 but larger than the width of the self-locking slider 5. This design ensures that the anchoring wedge core 1 can slide along the inclined surface of the wedge core groove 3 without interfering with the stepped structure 6, and that the self-locking slider 5 can fall downward into the stepped structure 6 and engage with the serrated steps of the stepped structure 6. The height of the stepped structure 6 does not exceed the inclined surface of the wedge core groove 3 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 above the stepped structure 6 and stops moving, the self-locking slider 5 falls into the serrated steps of the stepped structure 6 under the action of gravity; and gets stuck on the side wall of the serrated steps, thereby locking the anchoring wedge core 1 and preventing the anchoring wedge core 1 from moving backward and loosening.

[0044] Furthermore, the tail of the clamp body 2 is also provided with a pushing structure; the pushing structure includes a support plate 7 and a clamping bolt 8 fixed to the tail of the clamp body 2, the support plate 7 is provided with a threaded hole, and the middle part of the clamping bolt 8 is threadedly connected to the support plate 7 through the threaded hole; furthermore, an anti-loosening washer 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. By tightening the clamping bolt 8, the anchoring wedge core 1 is squeezed, causing relative movement between the anchoring wedge core 1 and the clamp body 2. The anchoring wedge core 1 moves upward along the wedge core groove 3 and gradually approaches the top wall of the clamp cavity, clamping the composite core 12. The pushing structure can provide thrust to enable the anchor clamp to complete the clamping action. At the same time, it can further prevent the anchoring wedge core 1 from loosening under external force or vibration.

[0046] When in operation, 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, applying pressure to the composite core 12 of the overhead conductor. At the same time, the wedge-shaped head of the anchoring wedge core 1 moves above the stepped structure 6 set on the wedge core slot 3. The first self-locking slider 5 falls into the locking groove of the stepped structure 6 under the action of gravity. If the pressure on the composite core 12 is not yet up to standard, the anchoring wedge core 1 is pushed to make the second self-locking slider 5 fall down until the pressure on the composite core 12 is up to standard. At this time, the two self-locking sliders 5 fall into the locking groove and lock the anchoring wedge core 1 in position. It should be noted that in this embodiment, the distance between the two self-locking sliders 5 is the same as the distance between the locking grooves on the stepped structure 6, which can ensure that both self-locking sliders 5 can fall into the locking groove. The purpose is to improve the strength of the anti-loosening structure, with two self-locking sliders 5 bearing force at the same time.

[0047] Furthermore, the tail of the anchoring wedge core 1 is provided with a connector to be fixedly connected to the composite core 12. The connector consists of upper and lower pressure plates 9 and bolts. A circular groove is provided between the upper and lower pressure plates 9 for placing the composite core 12. The composite core 12 is pressed between the upper and lower pressure plates 9 by tightening the screws, so that the composite core 12 and the tail of the anchoring wedge core 1 are fixedly connected.

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

[0049] Furthermore, the inner 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 uses an existing structure.

[0050] Since the outer aluminum conductor layer 13 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 it is 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 pre-twisted wire; the outer pre-twisted wire is wound around the inner pre-twisted wire 4 to further reinforce the interior; the outer pre-twisted wire is not shown in the figure.

[0052] Furthermore, both the anchoring wedge core 1 and the clamp body 2 are made of carbon fiber composite material, which includes at least one of high-temperature fiber, fire-resistant fiber, and cold-resistant fiber. Carbon fiber composite material has advantages such as high corrosion resistance and strength, which can improve the durability of the anchoring wedge core 1 and the clamp body 2.

[0053] Working principle:

[0054] When installing the anchor clamp, first peel off a section of the aluminum conductor layer 13 at the end of the overhead conductor to expose the composite core 12 in the middle. Place the clamp body 2 onto the composite core 12, ensuring the composite core 12 can enter the clamp cavity and is properly positioned to mate with the subsequently inserted anchor wedge core 1. Then, place the anchor wedge core 1 into the wedge core slot 3 inside the clamp body 2, at which point the inclined surface of the anchor wedge core 1 fits against the inclined surface of the wedge core slot 3.

[0055] Next, by tightening the clamping bolt 8 in the push structure at the tail of the clamp body 2, the top of the clamping bolt 8 applies a thrust to the tail of the anchoring wedge core 1 using the thread transmission principle. Due to the engagement between the anchoring wedge core 1 and the inclined surface of the wedge core groove 3, the anchoring wedge core 1 moves upward along the wedge core groove 3 under the thrust. As the anchoring wedge core 1 rises, the distance between its upper surface and the top wall of the clamp cavity gradually decreases, exerting a squeezing effect on the composite core 12 located between them, thus clamping the composite core 12.

[0056] During this process, the self-locking slider 5 in the guide groove 11 on the lower surface of the anchoring wedge core 1 also moves along with the anchoring wedge core 1. When the self-locking slider 5 moves above the stepped structure 6, the first self-locking slider 5 falls into the locking groove of the stepped structure 6 under the action of gravity and locks onto the vertical side wall of the locking groove. At this time, if the clamping force on the composite core 12 is not sufficient, the anchoring wedge core 1 is pushed further, and the subsequent self-locking sliders 5 will fall down in sequence until a suitable clamping force is reached. All the self-locking sliders 5 fall into the locking groove, locking the anchoring wedge core 1 in this position and preventing it from moving backward, thereby achieving reliable clamping of the composite core 12.

[0057] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An anchor clamp for installation on a composite core of an overhead conductor, characterized by, The utility model relates to an anchor wedge core (1) and wire clamp body (2) are included; Wire clamp body (2) is provided with wire clamp cavity along the axial direction, and the bottom wall of wire clamp cavity is provided with wedge core clamping groove (3) with inclined surface;Anchor wedge core (1) is arranged in wedge core clamping groove (3), and anchor wedge core (1) and wire clamp cavity top wall enclose the clamping space for clamping composite core; It further includes an anti-loosening structure;The anti-loosening structure is arranged between the anchor wedge core (1) and the wedge core clamping groove (3), and the anchor wedge core (1) and the wedge core clamping groove (3) are locked through the anti-loosening structure; The anti-loosening structure includes a self-locking slider (5) and a stepped structure (6); The side of the anchor wedge core (1) close to the wedge core clamping groove (3) is provided with a plurality of vertical guide grooves (11), and each guide groove (11) is slidably connected with a self-locking slider (5);The self-locking slider (5) has a downward movement tendency under the action of its own gravity; A groove is formed on the inclined surface of the wedge core clamping groove (3), and a stepped structure (6) is arranged in the groove along the movement direction of the anchor wedge core (1);The cross section of the stepped structure (6) is zigzag-shaped; When the anchor wedge core (1) moves upward, the lower end of the self-locking slider (5) is pressed against the stepped structure (6) and slides along the outer surface of the stepped structure (6);When the anchor wedge core (1) stops moving, the lower end of the self-locking slider (5) is clamped to the outer surface of the stepped structure (6). It further includes an inner layer pre-stranded wire (4), which is wound around the aluminum conductor layer (13) of the overhead conductor and the outside of the wire clamp body (2).

2. The anchor clip of claim 1, wherein, The tail of the wire clamp body (2) is further provided with a pushing structure;The pushing structure includes a support plate (7) fixed to the tail of the wire clamp body (2) and a compression bolt (8), the support plate (7) is provided with a threaded hole, and the compression bolt (8) is threadedly connected with the support plate (7);The end of the compression bolt (8) abuts against the tail of the anchor wedge core (1), and by tightening the compression bolt (8), the end of the compression bolt (8) pushes the anchor wedge core (1) to move forward.

3. The anchor clip of claim 1, wherein, The tail of the anchor wedge core (1) is provided with an upper and lower pressing plate (9), and a recess is formed between the upper and lower pressing plates (9) for placing the composite core (12).

4. The anchor clip of claim 1, wherein, The side of the wire clamp body (2) is hingedly connected with a connecting rod (10), and the connecting rod (10) is used for fixedly connecting with the tension tower;An insulating device is additionally arranged between the connecting rod (10) and the tension tower.

5. The anchor clip of claim 1, wherein, The end of the inner layer pre-stranded wire (4) is provided with a connecting piece, which is used for fixedly connecting with the tension tower.

6. The anchor clip of claim 2, wherein, It further includes an outer layer pre-stranded wire, which is wound around the inner layer pre-stranded wire (4).

7. The anchor clip of claim 2, wherein, The upper surface of the anchor wedge core (1) is provided with a semicircular groove arranged in the horizontal direction and along the length direction of the anchor wedge core (1);Correspondingly, a semicircular groove is also formed on the top wall of the wire clamp cavity, and the composite core (12) is clamped between the two semicircular grooves.

8. The anchor clip of claim 1, wherein, ​

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