A suspension wire clamp for overhead power transmission line

Abstract

The present invention relates to the technical field of suspension wire clamps, and discloses a suspension wire clamp for an overhead transmission line, comprising a cable, a pre-twisted layer, a fastening clamp and a wire clamp; the pre-twisted layer is installed on the cable, and fastening clamps are installed at both ends of the pre-twisted layer respectively, and the wire clamp is located on the pre-twisted layer between two fastening clamps; the wire clamp comprises a U-shaped frame, a roller group A, a roller group B, a lead screw, a top cover and a connector. The suspension wire clamp for an overhead transmission line is laid on the cable through the pre-twisted layer to protect the cable, without concentrated stress, avoiding bending stress, and playing a role in protecting and assisting vibration reduction for the optical cable. The fastening clamp is used to connect the two ends of the pre-twisted layer to avoid loosening, and the wire clamp clamps the cable so that the wire clamp can slide on the pre-twisted layer between the two fastening clamps, and when the cable is twisted due to stress, the wire clamp does not affect its release and supports the cable.

Description

Technical Field

[0001] The invention relates to the technical field of suspension wire clamps, in particular to a suspension wire clamp for an overhead power transmission line. Background Art

[0002] The suspension clamp is a hardware fitting that suspends the conductor (ground) wire to the suspension insulator string (group) or hardware string (group). The suspension clamp is a common standardized product, and now retains the U-bolt style (usually called the boat-shaped clamp). It is composed of a bracket U-bolt, a clamp hull made of forgeable cast iron, and a pressure plate. The other is a pre-twisted suspension clamp. The suspension clamp is used to fix the conductor to the insulator string of a straight pole tower, or to suspend the lightning arrester on a straight pole tower. It can also be used to support the transposition conductor on the transposition pole tower and fix the jumper of the tension angle pole tower, which protects the optical cable and assists in vibration reduction.

[0003] When the cable is being strung, it is pulled by the traction rope and the traction rigging. The traction rigging is used to balance the traction of the cable pulley, which can effectively release the anti-rotation torque of the connection cable system. In order to ensure that the overhead transmission line rotary connector does not cause the traction board to become unstable, the pulley to be damaged, or the conductor to become loose during the laying process, and to improve the construction quality of the transmission line, the cable has torque stress during construction. The existing suspension clamp will hinder the release of stress when the cable is fixed during use, affecting the safety of the cable. For this reason, we propose an overhead transmission line suspension clamp. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a suspension clamp for an overhead power transmission line.

[0005] The present invention provides the following technical solutions: an overhead power transmission line suspension clamp, comprising a cable, a pre-twisted layer, a fastening clamp and a clamp;

[0006] The pre-twisted layer is installed on the cable, and fastening clamps are installed at both ends of the pre-twisted layer respectively, and the wire clamp is located on the pre-twisted layer between the two fastening clamps;

[0007] The wire clamp comprises a U-shaped frame, a roller set A, a roller set B, a lead screw, a top cover and a connecting piece;

[0008] 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 to the top of the top cover.

[0009] Preferably, the roller group A and the roller group B are both composed of a base and rollers, and a plurality of rollers are provided and distributed in the grooves of the base, and the rollers on the roller group A and the roller group B are in contact with the upper and lower ends of the pre-twisted layer.

[0010] Preferably, the four legs of the U-shaped frame are provided with adjustment openings, and the roller group B is provided with holes, the lead screw is located in the hole of the roller group B, and the two ends of the lead screw extend from the adjustment openings of the two legs of the U-shaped frame respectively and are fastened by nuts.

[0011] Preferably, the top cover is U-shaped with holes at both ends, and holes are formed at the top ends of the four legs of the U-shaped frame. Both ends of the top cover extend to the inner sides of the four legs of the U-shaped frame so that the holes are aligned and connected by bolts.

[0012] 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, the rubber sleeve is provided with two and covers the two ends of the pre-twisted wire inner layer, the pre-twisted wire outer layer is laid on the pre-twisted wire inner layer and covers the rubber sleeve, and the fastening clip is installed at the rubber sleeve of the pre-twisted wire outer layer.

[0013] Preferably, a cutout is provided on the side of the rubber sleeve.

[0014] Preferably, two ends of the outer layer of the pre-twisted wire extend from the inner layer of the pre-twisted wire to the cable.

[0015] Preferably, the fastening clamp includes a semicircular ring and an elastic inner pad, the semicircular ring is provided with two and is rotatably connected by a connecting shaft, and the other ends of the two semicircular rings are connected by bolts, and the elastic inner pad is laid on the inner side of the semicircular ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The overhead transmission line suspension clamp is laid on the cable through a pre-twisted layer to protect the cable without concentrated stress, avoiding bending stress, protecting the optical cable and assisting in vibration reduction. The two ends of the pre-twisted layer are connected with the fastening clamp to prevent it from loosening, and the wire clamp clamps the cable so that the wire clamp can slide on the pre-twisted layer between the two fastening clamps. When the cable is twisted due to stress, the wire clamp does not affect its release and supports the cable.

[0018] The wire clamp provides support for the cable. When the cable is shaking, the wire clamp can effectively hinder the swing of the cable to achieve the purpose of auxiliary vibration reduction. In addition, the wire clamp slides back and forth on the pre-twisted layer, so there are many stress points, which will not cause the pre-twisted layer to compress the cable, effectively avoiding damage to the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the wire clamp of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the pre-twisted layer of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the fastening clip of the present invention.

[0023] In the figure: 1. cable; 2. pre-twisted layer; 21. pre-twisted wire inner layer; 22. rubber sleeve; 23. pre-twisted wire outer layer; 3. fastening clamp; 31. semicircular ring; 32. elastic inner pad; 4. wire clamp; 41. U-shaped frame; 42. roller group A; 43. roller group B; 44. top cover; 45. connecting piece; 46. screw. DETAILED DESCRIPTION

[0024] In order to make the objectives, 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 drawings of the embodiments of the present disclosure. In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of known functions and known components to avoid unnecessary confusion of the concepts of the present invention.

[0025] See also Figure 1-4 , an overhead transmission line suspension clamp, comprising a cable 1, a pre-twisted layer 2, a fastening clamp 3 and a clamp 4;

[0026] The pre-twisted layer 2 is installed on the cable 1, and the pre-twisted layer 2 includes a pre-twisted wire inner layer 21, a rubber sleeve 22 and a pre-twisted wire outer layer 23. The pre-twisted wire inner layer 21 is laid on the cable 1, and the rubber sleeve 22 is provided with two and is coated on both 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 the fastening 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, avoiding bending stress, and playing a role in protecting and assisting vibration reduction of the optical cable, 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 clamp 3.

[0027] The side of the rubber sleeve 22 is provided with a cutout, so that the cable enters the inner side of the rubber sleeve 22 through the cutout, which facilitates the installation of the rubber sleeve 22.

[0028] Both ends of the pre-twisted wire outer layer 23 extend from the pre-twisted wire inner layer 21 to the cable 1 , thereby enhancing the stability of the pre-twisted wire outer layer 23 .

[0029] The two ends of the pre-twisted layer 2 are respectively installed with fastening clamps 3, and the wire clamp 4 is located on the pre-twisted layer 2 between the two fastening clamps 3. The fastening clamp 3 includes a semicircular ring 31 and an elastic inner pad 32. The semicircular ring 31 is provided with two and is rotatably connected by a connecting shaft, and the other ends of the two semicircular rings 31 are connected by bolts. The elastic inner pad 32 is laid on the inner side of the semicircular ring 31. The fastening clamp 3 is installed on the pre-twisted layer 2 to limit the position of the wire clamp 4, prevent the pre-twisted layer 2 from loosening, and prevent the pre-twisted layer 2 from sliding on the cable 1.

[0030] The wire clamp 4 includes a U-shaped frame 41, a roller group A42, a roller group B43, a screw 46, a top cover 44 and a connecting piece 45. The roller group A42 is installed at the bottom end of the inner side of the U-shaped frame 41, and the roller group B43 is installed on the inner side of the U-shaped frame 41 through the screw 46, and the roller group A42 and the roller group B43 are in contact with the pre-twisted layer 2. The top cover 44 is installed on the top of the U-shaped frame 41 by bolts, and the connecting piece 45 is U-shaped and welded to the top of the top cover 44. The position of the roller group B43 is convenient to adjust and the installation is convenient. The roller group A42 and the roller group B43 are in contact with the pre-twisted layer 2, so that the pre-twisted layer 2 slides on the roller group A42 and the roller group B43 and provides support for them without affecting the torque stress release of the cable.

[0031] The roller group A42 and the roller group B43 are both composed of a base and rollers, and multiple rollers are provided and distributed in the grooves of the base. The rollers on the roller group A42 and the roller group B43 are in contact with the upper and lower ends of the pre-twisted layer 2. The pre-twisted layer 2 is clamped by the two groups of rollers from the upper and lower directions, but the pre-twisted layer 2 can slide and rotate thereon, thereby providing support.

[0032] The four legs of the U-shaped frame 41 are provided with adjustment openings, and the roller group B43 is provided with a hole. The lead screw 46 is located in the hole of the roller group B43, and the two ends of the lead screw 46 extend from the adjustment openings of the two legs of the U-shaped frame 41 respectively and are fastened by nuts. During installation, the pre-twisted layer 2 is first contacted with the roller group A42, and then the roller group B43 is installed on the U-shaped frame 41 and in contact with the pre-twisted layer 2. Then the lead screw 46 is inserted into the hole and fastened 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.

[0033] The top cover 44 is U-shaped and has holes at both ends, and the top ends of the four legs of the U-shaped frame 41 have holes. The two ends of the top cover 44 extend to the inner sides of the four legs of the U-shaped frame 41 and align the holes and connect them by bolts, which is convenient for installation.

[0034] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An overhead power transmission line suspension clamp, characterized in that: It comprises a cable (1), a pre-twisted layer (2), a fastening clamp (3) and a wire clamp (4); The pre-twisted layer (2) is installed on the cable (1), and fastening clamps (3) are respectively installed at both ends of the pre-twisted layer (2), and the wire clamp (4) is located on the pre-twisted layer (2) between the two fastening clamps (3); The wire clamp (4) comprises a U-shaped frame (41), a roller set A (42), a roller set B (43), a lead screw (46), a top cover (44) and a connecting piece (45); The roller group A (42) is mounted on the bottom end of the inner side of the U-shaped frame (41), the roller group B (43) is mounted on the inner side of the U-shaped frame (41) via a lead screw (46), and the roller group A (42) and the roller group B (43) are in contact with the pre-twisted layer (2), the top cover (44) is mounted on the top end of the U-shaped frame (41) via bolts, and the connecting member (45) is U-shaped and welded to the top end of the top cover (44); The roller group A (42) and the roller group B (43) are both composed of a base body and rollers, and a plurality of rollers are provided and distributed in the grooves of the base body, and the rollers on the roller group A (42) and the roller group B (43) are in contact with the upper and lower ends of the pre-twisted layer (2); The four legs of the U-shaped frame (41) are provided with adjustment openings, and the roller group B (43) is provided with a hole, the lead screw (46) is located in the hole of the roller group B (43), and the two ends of the lead screw (46) respectively extend from the adjustment openings of the two legs of the U-shaped frame (41) and are fastened by nuts.

2. The overhead power transmission line suspension clamp according to claim 1, characterized in that: The top cover (44) is U-shaped and has holes at both ends, and the top ends of the four legs of the U-shaped frame (41) have 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) so that the holes are aligned and connected by bolts.

3. The overhead power transmission line suspension clamp according to claim 1, characterized in that: The pre-twisted layer (2) comprises a pre-twisted wire inner layer (21), a rubber sleeve (22) and a pre-twisted wire outer layer (23); the pre-twisted wire inner layer (21) is laid on the cable (1); the rubber sleeve (22) is provided with two and covers both 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 the fastening clamp (3) is installed at the rubber sleeve (22) of the pre-twisted wire outer layer (23).

4. The overhead power transmission line suspension clamp according to claim 3, characterized in that: A cutout is provided on the side of the rubber sleeve (22).

5. The overhead power transmission line suspension clamp according to claim 3, characterized in that: Both ends of the pre-twisted wire outer layer (23) extend from the pre-twisted wire inner layer (21) to the cable (1).

6. The overhead power transmission line suspension clamp according to claim 1, characterized in that: The fastening clamp (3) comprises a semicircular ring (31) and an elastic inner pad (32), wherein two semicircular rings (31) are provided and are rotatably connected via a connecting shaft, and the other ends of the two semicircular rings (31) are connected via bolts, and the elastic inner pad (32) is laid on the inner side of the semicircular ring (31).

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