CN115411684A - Overhead transmission line suspension clamp - Google Patents

Abstract

The invention relates to the technical field of suspension clamps, and discloses a suspension clamp for overhead transmission lines, which includes cables, pre-twisted layers, fastening clips and wire clamps; the pre-twisted layer is installed on the cable, and the pre-twisted layer Fastening clips are respectively installed at both ends of the two fastening clips, and the clips are located on the pre-twisted layer between the two fastening clips; the clips include a U-shaped frame, a roller group A, a roller group B, a lead screw, Top cover and connectors. The suspension clamp of the overhead transmission line is laid on the cable through the pre-twisted layer to protect the cable, without concentrated stress, avoid bending stress, and protect the optical cable and assist in vibration reduction. The two ends of the layer are connected to prevent it from loosening, and the clamp clamps the cable so that the clamp can slide on the pre-twisted layer between the two fastening clamps, and when the cable is twisted due to stress, the clamp does not Affects its release and supports the cable.

Description

Suspension clamp for overhead transmission line

technical field

The invention relates to the technical field of suspension clamps, in particular to a suspension clamp for overhead power transmission lines.

Background technique

Suspension clamp suspends the guide (ground) wire to the fittings on the suspension insulator string (group) or fittings string (group), and the usual stereotyped product of the suspension clamp, now retains the U-bolt style (usually called the boat-shaped clamp) , it is made up of pylon U-shaped bolts, a clamp hull made of malleable cast iron, and a pressure plate. The other is the pre-twisted suspension clamp. The suspension clamp is used to fix the wire on the insulator string of the straight pole tower, or hang the lightning protection wire on the straight pole tower, and it can also be used to support the transposition wire on the transposition pole tower and the fixation of the jumper wire of the strain-resistant corner pole tower, which is very important for the optical cable. To the role of protection and auxiliary shock absorption.

When the cable is set up, the cable is pulled by the pulling rope and the towed sling, and the pulling sling is used to balance the pulling process through the pay-off block, which can effectively release the anti-rotation torque of the connecting cable system. In order to ensure that the rotary connector of the overhead transmission line avoids the phenomenon of traction plate instability, damage to the pulley or loose strands of the wire during the unwinding process, and improves the construction quality of the transmission line stringing, the cable is due to the torque stress during construction. During the use of the existing suspension clamp, fixing the cable will hinder the release of its stress and affect the safety of the cable. Therefore, we propose a suspension clamp for overhead transmission lines.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a suspension clamp for overhead power transmission lines.

The present invention provides the following technical solutions: a suspension clamp for an overhead power transmission line, including a cable, a pre-twisted layer, a fastening clamp and a clamp;

The pre-twisted layer is installed on the cable, fastening clips are respectively installed at both ends of the pre-twisted layer, and the wire clip is located on the pre-twisted layer between the two fastening clips;

The clamp includes a U-shaped frame, a roller group A, a roller group B, a lead screw, a top cover and a connector;

The roller group A is installed at the bottom end of the inner side of the U-shaped frame, the roller group B is installed on the inner side of the U-shaped frame through a screw, and the roller group A and the roller group B are in contact with the pre-twisted layer. The top cover is installed on the top of the U-shaped frame through bolts, and the connecting piece is U-shaped and welded on the top of the top cover.

Preferably, the roller group A and the roller group B are composed of a seat body and a roller, and the rollers are provided with multiple and distributed in the groove of the seat body, the roller group A and the roller group B The upper rollers are in contact with the upper and lower ends of the pre-twisted layer.

Preferably, the four legs of the U-shaped frame are provided with adjustment openings, and holes are provided on the roller group B, the screw is located in the hole of the roller group B, and the two ends of the screw are connected from the U The adjustment openings of the two legs of the frame extend out and are fastened by nuts.

Preferably, the top cover is U-shaped and holes are opened at both ends, and holes are opened at the top of the four legs of the U-shaped frame, and the two ends of the top cover extend to the inside of the four legs of the U-shaped frame and make the holes Align and connect with bolts.

Preferably, the pre-twisted layer includes a pre-twisted wire inner layer, a rubber sleeve and a pre-twisted wire outer layer, the pre-twisted wire inner layer is laid on the cable, and the rubber sleeve is provided with two and covered on the pre-twisted wire The two ends of the wire inner layer, the pre-twisted wire outer layer is laid on the pre-twisted wire inner layer and covered on the rubber sleeve, and the fastening clip is installed at the rubber sleeve of the pre-twisted wire outer layer.

Preferably, a cutout is provided on the side of the rubber sleeve.

Preferably, both ends of the pre-twisted wire outer layer extend from the pre-twisted wire inner layer to the cable.

Preferably, the fastening clip includes a semi-circular ring and an elastic inner pad, and two semi-circular rings are provided and are rotatably connected by a connecting shaft, and the other ends of the two semi-circular rings are connected by bolts, and the elastic inner pad The pads are laid on the inside of the semi-circular rings.

Compared with the prior art, the present invention has the following beneficial effects:

The suspension clamp of the overhead transmission line is laid on the cable through the pre-twisted layer to protect the cable, without concentrated stress, avoid bending stress, and protect the optical cable and assist in vibration reduction. The two ends of the layer are connected to prevent it from loosening, and the clamp clamps the cable so that the clamp can slide on the pre-twisted layer between the two fastening clamps, and when the cable is twisted due to stress, the clamp does not Affects its release and supports the cable.

The clamp provides support for the cable. When the cable is shaking, the clamp can effectively hinder the swing of the cable to achieve the purpose of auxiliary vibration reduction. In addition, the clamp slides back and forth on the pre-twisted layer, so there are many stress points, which will not make the pre-twisted The twisted layer compresses the cable, effectively avoiding damage to the cable.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of wire clip of the present invention;

Fig. 3 is the structural representation of pre-twisted layer of the present invention;

Fig. 4 is a structural schematic diagram of the fastening clip of the present invention.

In the figure: 1. cable; 2. pre-twisted layer; 21. inner layer of pre-twisted wire; 22. rubber sleeve; 23. outer layer of pre-twisted wire; 3. fastening clip; Pad; 4, wire clip; 41, U-shaped frame; 42, roller group A; 43, roller group B; 44, top cover; 45, connector; 46, lead screw.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. In order to maintain the following description of the embodiments of the present disclosure For clarity and conciseness, the present disclosure omits detailed descriptions of known functions and known components to avoid unnecessarily obscuring the concepts of the present invention.

Please refer to Figures 1-4, a suspension clamp for overhead transmission lines, including a cable 1, a pre-twisted layer 2, a fastening clamp 3 and a clamp 4;

The pre-twisted layer 2 is installed on the cable 1, and the pre-twisted layer 2 includes a pre-twisted inner layer 21, a rubber sleeve 22 and a pre-twisted outer layer 23, and the pre-twisted inner layer 21 is laid on the cable 1 , the rubber sleeve 22 is provided with two and coated on the two ends of the pre-twisted wire inner layer 21, the pre-twisted wire outer layer 23 is laid on the pre-twisted wire inner layer 21 and covers the rubber sleeve 22, and tightly The clamp 3 is installed at the rubber sleeve 22 of the pre-twisted wire outer layer 23. The combination of the pre-twisted wire inner layer 21 and the pre-twisted wire outer layer 23 can well protect the optical cable without concentrated stress and avoid bending stress. It plays the role of protection and auxiliary vibration reduction, and the rubber sleeve 22 can make the two ends of the pre-twisted wire outer layer 23 bulge, which is convenient for the installation of the fastening clip 3 .

The side of described rubber sheath 22 is provided with otch, and cable enters the inner side of rubber sheath 22 through otch like this, facilitates rubber sheath 22 installation.

Both ends of the pre-twisted wire outer layer 23 extend from the pre-twisted wire inner layer 21 to the cable 1 to enhance the stability of the pre-twisted wire outer layer 23 .

The two ends of the pre-twisted layer 2 are respectively equipped with fastening clips 3, and the clamp 4 is located on the pre-twisted layer 2 between the two fastening clips 3, and the fastening clip 3 includes a semicircular ring 31 and Elastic inner pads 32, the semi-circular rings 31 are provided with two and are rotatably connected by a connecting shaft, and the other ends of the two semi-circular rings 31 are connected by bolts, and the elastic inner pads 32 are laid on the inner side of the semi-circular rings 31 , the fastening clip 3 is installed on the pre-twisted layer 2 to limit the position of the wire clamp 4 and prevent the pre-twisted layer 2 from loosening and prevent the pre-twisted layer 2 from sliding on the cable 1 .

Described wire clip 4 comprises U-shaped frame 41, roller group A42, roller group B43, leading screw 46, top cover 44 and connector 45, and described roller group A42 is installed on the bottom end of U-shaped frame 41 inner side, The roller group B43 is installed inside the U-shaped frame 41 through a screw 46, and the roller group A42 and the roller group B43 are in contact with the pre-twisted layer 2, and the top cover 44 is installed on the top of the U-shaped frame 41 by bolts , the connecting piece 45 is U-shaped and welded on the top of the top cover 44, the position of the roller group B43 is convenient to adjust, and the installation is convenient. Layer 2 slides on and supports roller set A42 and roller set B43 without affecting the torque stress relief of the cable.

Both the roller group A42 and the roller group B43 are composed of a seat body and a roller, and the rollers are provided with a plurality of grooves distributed in the seat body, the rollers on the roller group A42 and the roller group B43 The shaft is in contact with the upper and lower ends of the pre-twisted layer 2, and the pre-twisted layer 2 is clamped by two sets of rollers from the upper and lower directions, but the pre-twisted layer 2 can slide and rotate on it, thus providing support.

The four legs of the U-shaped frame 41 are provided with adjustment openings, and the roller group B43 is provided with holes, the leading screw 46 is located in the hole of the roller group B43, and the two ends of the leading screw 46 are connected from the U respectively. The adjustment ports of the two legs of the U-shaped frame 41 are extended and tightened by nuts. When installing, the pre-twisted layer 2 is first in contact with the roller group A42, and then the roller group B43 is installed on the U-shaped frame 41 and connected with the pre-twisted layer. 2, then insert the lead screw 46 into the hole, and tighten it with a nut to fix the position of the lead screw 46, so that the roller group A42 and the roller group B43 clamp the pre-twisted layer 2 together.

The top cover 44 is U-shaped and two ends are provided with holes, and the tops of the four legs of the U-shaped frame 41 are provided with holes, and the two ends of the top cover 44 extend to the inner sides of the four legs of the U-shaped frame 41 and make The holes are aligned and connected by bolts, so it is easy to install.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the spirit and protection scope of the present invention, and such modifications or equivalent replacements should also be deemed to fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides an overhead transmission line suspension clamp which characterized in that: comprises a cable (1), a pre-twisted layer (2), a fastening clamp (3) and a wire clamp (4);

the pre-twisted layer (2) is arranged on the cable (1), the two ends of the pre-twisted layer (2) are respectively provided with the fastening clips (3), and the wire clip (4) is positioned on the pre-twisted layer (2) between the two fastening clips (3);

the wire clamp (4) comprises a U-shaped frame (41), a roller group A (42), a roller group B (43), a screw rod (46), a top cover (44) and a connecting piece (45);

roller group A (42) is installed in the inboard bottom of U-shaped frame (41), roller group B (43) are installed in U-shaped frame (41) inboard through lead screw (46), and roller group A (42) and roller group B (43) contact with preformed armor (2), top cap (44) are installed on the top of U-shaped frame (41) through the bolt, connecting piece (45) are the U-shaped and weld the top at top cap (44).

2. The overhead transmission line suspension clamp of claim 1, wherein: the roller group A (42) and the roller group B (43) are both composed of a base body and rollers, the rollers are arranged in a plurality of grooves distributed in the base body, and the rollers on the roller group A (42) and the roller group B (43) are in contact with the upper end and the lower end of the pre-twisted layer (2).

3. The overhead transmission line suspension clamp of claim 1, wherein: the adjustable U-shaped frame is characterized in that adjusting openings are formed in four supporting legs of the U-shaped frame (41), holes are formed in the roller group B (43), the lead screw (46) is located in the holes of the roller group B (43), and two ends of the lead screw (46) extend out of the adjusting openings of the two supporting legs of the U-shaped frame (41) respectively and are fastened through nuts.

4. The overhead transmission line suspension clamp of claim 1, wherein: the top cover (44) is U-shaped, holes are formed in the two ends of the top cover, the top ends of the four supporting legs of the U-shaped frame (41) are provided with the holes, the two ends of the top cover (44) extend to the inner sides of the four supporting legs of the U-shaped frame (41), and the holes are connected with the four supporting legs of the U-shaped frame (41) through bolts.

5. The overhead transmission line suspension clamp of claim 1, wherein: preformed armor rods (2) are including preformed armor rods inlayer (21), rubber sleeve (22) and preformed armor rods skin (23), laid on cable (1) preformed armor rods inlayer (21), rubber sleeve (22) are equipped with two and the cladding at the both ends of preformed armor rods inlayer (21), laid on preformed armor rods inlayer (21) and cover on rubber sleeve (22) preformed armor rods skin (23), and the rubber sleeve (22) department at preformed armor rods skin (23) is installed in fastening clamp (3).

6. The overhead transmission line suspension clamp of claim 5, wherein: the side surface of the rubber sleeve (22) is provided with a notch.

7. The overhead transmission line suspension clamp of claim 5, wherein: and two ends of the preformed armor rods outer layer (23) extend to the cable (1) from the preformed armor rods inner layer (21).

8. The overhead transmission line suspension clamp of claim 1, wherein: pad (32) in mounting clip (3) include semicircle ring (31) and elasticity, semicircle ring (31) are equipped with two and rotate through the connecting axle and connect, and the other end of two semicircle rings (31) passes through bolted connection, pad (32) are laid in the inboard of semicircle ring (31) in the elasticity.

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