CN110401163A - Three across ADSS optical cable wedge blocks clamp security personnel's fitting - Google Patents

Abstract

This patent discloses a "three-span" ADSS optical cable wedge-shaped block clamping security fittings. A wedge-shaped groove (9) is arranged on the metal body (1), and the arc-shaped grooves (7) of the two wedge-shaped blocks (2) are opposite to each other. Arranged in the wedge-shaped groove (9) to form an optical cable groove; the ADSS optical cable (4) outside the optical cable clamp (18) is clamped in the optical cable groove; a pull ring (3) is connected to the metal body (1); the insulation One end of the rope (16) is connected on the pull ring (3), and the other end is connected on the cross arm (15); when the wedge block (2) moves away from the direction of the cable clamp (18), the ADSS optical cable (4) Clamped and fixed in the optical cable groove; when the optical cable breaks, the broken optical cable can be fixed in the original position, which is equivalent to adding a pair of safety ropes to the "three-span" optical cable to prevent major traffic accidents caused by falling when the optical cable breaks , to solve the "three-span" optical cable security risks.

Description

Three-span ADSS optical cable wedge block clamping security fittings

technical field

This patent relates to a safety fitting for ADSS optical cables arranged along overhead transmission lines, in particular to a "three-span" ADSS optical cable wedge-shaped block clamping safety fitting.

Background technique

According to the State Grid Corporation of China's "Three-span Overhead Transmission Line "Major Anti-Accident Measures" (Trial) (State Grid Transport Inspection No. 2016-413), the definition of "three-span" refers to crossing high-speed railways, expressways and important transmission channels. Sections of overhead transmission lines. ADSS optical cable is also called all-dielectric self-supporting optical cable. All-dielectric means that the optical cable uses all-dielectric materials. Self-supporting means that the strengthening member of the optical cable itself can bear its own weight and external load. Since ADSS optical cables are generally erected in parallel with the transmission line conductors using the towers of high-voltage transmission lines, they must also comply with the requirements of the "Major Anti-Accident Measures for "Three-Span" Overhead Transmission Lines".

ADSS optical cables are generally suspended on the cross arm of the tower through optical cable clamps (including tension clamps or suspension clamps). The wind deflection angle is very large under strong wind conditions. When the wind speed is 30m/s, the wind deflection angle of the ADSS optical cable It can reach 80°, and the wind deflection angle of the wire is only about half of that of the optical cable; the horizontal wind blows to the ADSS optical cable, and the ADSS optical cable will vibrate in the wind; thus causing fatigue damage to the ADSS optical cable at the hanging point, and the ADSS optical cable is in the optical cable clamp. The outer side of the cable breaks, and the broken optical cable falls in the "three-span" area, which will inevitably cause major traffic safety accidents and greater social impact.

In recent years, "three-span" optical cable disconnection accidents have occurred frequently across the country. Taking Jiangsu Province as an example, there have been several "three-span" optical cable disconnection accidents throughout the province, posing a threat to traffic safety. One of them was the heavy snowfall in Jiangsu Province. The optical cable fell due to the snow in a certain city, which seriously affected the normal operation of the electrified railway and had a great impact on the power grid and society. For this reason, Jiangsu Provincial Electric Power Company requires that the "three-span" ADSS optical cables in all regions must be rectified. The current rectification plan mainly includes burying through pipes or changing them to OPGW optical cables. However, no matter which rectification method is adopted, due to problems such as construction difficulties and high construction costs, there is great resistance to implementation.

Contents of the invention

The purpose of the present invention is to design a "three-span" ADSS optical cable wedge clamping safety fittings, which can fix the broken optical cable in the original position when the optical cable breaks, which is equivalent to adding a pair of safety ropes to the "three-span" optical cable. When the optical cable breaks, it will cause a major traffic accident due to the fall, and solve the safety hazard of the "three-span" optical cable.

The technical solution of the present invention is: "three-span" ADSS optical cable wedge-shaped block clamps security fittings, which is characterized in that it includes a metal body and two wedge-shaped blocks, and a wedge-shaped groove is arranged on the metal body, and the shape of the wedge-shaped groove is the same as that of the two The wedge shape after the combination of the wedge blocks is suitable; each wedge block is provided with a through arc groove, the arc size of the arc groove matches the outer diameter of the ADSS optical cable, and the arc concave of the two wedge blocks The grooves are relatively arranged in the wedge-shaped groove to form an optical cable groove; the ADSS optical cable on the outside of the optical cable clamp is clamped in the optical cable groove; the large end of the wedge block and the large end of the wedge-shaped groove of the metal body open toward the optical cable clamp, and each wedge A wedge-shaped block screw hole is set on the large end face of the block; a pull ring and a metal screw hole are connected on the end face of the metal body facing the optical cable clamp; one end of the insulating rope is connected to the pull ring, and the other end is connected to the cross arm Above; when the wedge-shaped block moves away from the cable clamp, the gap between the two wedge-shaped blocks becomes smaller, and the clamping degree of the formed optical cable groove on the ADSS optical cable increases, so that the ADSS optical cable is clamped and fixed on the optical cable in the trunking;

The material of the wedge-shaped block is polytetrafluoroethylene or PEEK, and a zigzag anti-slip structure is provided along the arc axis direction in the arc-shaped groove of the wedge-shaped block;

Further, it also includes a special tool for extending the operating rod and screw connection, which is composed of an insulated operating rod, a connecting block and a double-ended screw that are rigidly connected in sequence. The operator uses the special tool for extending the operating rod and screw connecting on the pole tower to transfer the metal body to the optical cable. The outside of the clamp and the wedge-shaped groove surround the ADSS optical cable; one end of the insulating operating rod is an external thread end, and the other end is connected to an internal thread quick-connect joint; one end of the connecting block is provided with an internal thread hole, through which the internal thread hole and the double One end of the head screw is threaded, and the other end of the connecting block is connected with an internal thread quick connector, and the connecting block is connected with the external thread end of the insulating operating rod through the internal thread quick connector at the end; the other end of the double-ended screw is connected to the gold body. Fitting screw holes of fittings.

The advantages of the present invention are: the security fittings clamped by the wedge-shaped block do not bear the weight of the optical cable in the normal state of the ADSS optical cable, but can bear the full weight of the optical cable when the optical cable breaks, so as to avoid accidents in traffic, electric power and communication caused by the fall of the ADSS optical cable; The fittings are simple in structure and easy to operate and use; it solves the problems of difficult optical cables, difficult construction, and high reconstruction costs in the "three-span" rectification project.

Description of drawings

Figure 1: The front view of the connection state between the cable wedge clamping the security fitting and the cable;

Figure 2: Bottom view of the connection state between the cable wedge clamping the security fitting and the cable;

Figure 3: The right view of the connection state between the optical cable wedge clamping the security fitting and the optical cable;

Figure 4: Front view of the wedge block;

Figure 5: Top view of the wedge block;

Figure 6: Front view of gold concrete;

Figure 7: Top view of gold concrete;

Figure 8: Schematic diagram of the structure of the insulating operating rod;

Figure 9: Schematic diagram of the structure of the special tool for screw connection with extended operating rod;

Figure 10: Schematic diagram of the working state of the optical cable security fittings described in this patent.

In the figure, 1-gold concrete, 2-wedge block, 3-pull ring, 4-ADSS optical cable, 5-metal screw hole, 6-wedge block screw hole, 7-arc groove, 8-pull ring connection hole, 9-wedge groove, 10-insulated operating rod, 11-external threaded end, 12-internal threaded lock nut, 13-double-ended screw, 14-connecting block, 15-cross arm, 16-insulated rope, 17-vibration-proof Whip, 18-Fiber Cable Clamp.

Detailed ways

The patent will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, Figure 6, and Figure 7, the "three-span" ADSS optical cable wedge block clamping security fittings described in this patent include a metal body 1 and two wedge blocks 2, and a wedge-shaped groove is arranged on the gold body 1 9. The shape of the wedge-shaped groove 9 is adapted to the wedge shape after the combination of the two wedge-shaped blocks 2; the two wedge-shaped blocks 2 are symmetrically distributed in the wedge-shaped groove 9, and a through arc-shaped groove 7 is provided on each wedge-shaped block 2 The arc size of the arc groove 7 is adapted to the outer diameter of the ADSS optical cable 4, and the arc groove 7 of the two wedge-shaped blocks 2 is relatively arranged in the wedge-shaped groove 9 to form an optical cable groove, and the two wedge-shaped blocks 2 The curved surfaces of the arc groove 7 are opposite and there is a gap between the end faces; the ADSS optical cable 4 on the outside of the optical cable clamp 18 is clamped in the optical cable groove formed in the metal body 1; the large end of the wedge block 2 and the metal body 1 The large end opening of the wedge-shaped groove 9 faces the optical cable clamp 18, and a wedge screw hole 6 is provided on the large end face of each wedge-shaped block 2; Fitting screw holes 5 are provided; two pull ring connecting holes 8 are provided on the end face facing the optical cable clamp 18 at the bottom of the metal body 1, the pull ring 3 is U-shaped, and the ends of the two connecting rods of the U-shaped pull ring 3 Threads are provided, and after the threaded parts of the two connecting rods of the pull ring 3 pass through the two pull ring connection holes 8 on the metal body 1, nuts are respectively connected to the upper parts of the external threads of the end, so that the pull ring 3 is connected to the metal body 1 superior. One end of insulating rope 16 is connected on the draw ring 3, and the other end is connected on the cross arm 15; Smaller, the clamping degree of the formed optical cable groove on the ADSS optical cable 4 increases, that is, the tighter the clamping of the ADSS optical cable 4 is.

As shown in Fig. 4 and Fig. 5, each wedge-shaped block 2 is a rectangle, and one of its surfaces is a slope to form a wedge-shaped structure, and a positioning platform is arranged at the large end, and the positioning platform is connected to the structure of one end of the metal body 1 facing the optical cable clamp 18 Adaptation; on the big end face of each wedge block 2, a wedge block screw hole 6 is provided for connection with special tools during installation and construction, and a through arc-shaped groove is provided along the length direction on the side opposite to the inclined surface 7. There is a zigzag anti-slip structure in the direction of the arc axis in the arc groove 7; the arc grooves 7 of the two wedge blocks 2 are arranged opposite to each other to form an optical cable groove, and the inner diameter of the optical cable groove is the same as the outer diameter of the ADSS optical cable 4 The diameter is matched; there is a gap between the arc-shaped grooves 7 of the two wedge blocks 2, and the clamping degree of the ADSS optical cable 4 is adjusted through the gap.

The material of the wedge block 2 is polytetrafluoroethylene or PEEK. The gold body 1 is made of titanium alloy or aluminum alloy and is light in weight; the insulating rope 16 is made of aramid fiber.

As shown in Figure 8, the middle insulating part of the insulating operating rod 10 is generally made of bakelite, bakelite, epoxy glass plastic tube material, the length of a single tube is 1 to 2 meters, the insulating part accounts for more than 80% of the total length, and the insulating material is required to withstand high voltage , high strength, moisture-proof and light weight, and can be operated independently by one person; the two ends of the insulating operating rod 10 are metal joints, and the metal joints at both ends are fixedly connected with the insulating rod by crimping and riveting, and one of the metal joints is an external thread end 11, the metal joint at the other end is provided with a structure matching the internal thread quick connection joint 12, and is connected with the internal thread quick connection joint 12 to form a quick connection joint, through which the internal thread quick connection joint 12 is connected with another insulating operating rod 10 external thread end connection, so that the insulating operating rod combination is lengthened.

As shown in Figure 9, the special tool for connecting the extended operating rod screw is composed of an insulated operating rod 10, a connecting block 14 and a double-ended screw 13 which are rigidly connected in sequence. Move the metal body 1 to the outside of the optical cable clamp 18 and make the wedge-shaped groove 9 of the metal body 1 surround the ADSS optical cable 4; one end of the connecting block 14 is provided with an internally threaded hole, through which the internally threaded hole and one end of the double-ended screw 13 Threaded connection; the other end of the connection block 14 is provided with a structure that matches the internal thread quick connector 12, and is connected to the internal thread quick connector 12. The threaded end 11 is connected; the other end of the double-ended screw 13 is adapted to the fitting screw hole 5 on the metal body 1 .

The method of using the "three-span" ADSS optical cable wedge to clamp the security fittings described in this patent is as follows:

First, connect the pull ring 3 to the gold body 1, connect one end of the insulating rope 6 to the pull ring 3, and the special tool for connecting the lengthened operating rod and the screw rod is ready, and climb the tower with the hardware and the special tool for connecting the lengthened operating rod and the screw rod;

Connect the special tool for screw connection of the extended operating rod to the screw hole 5 of the fitting through the double-headed screw 13 at the end, and use the insulating operating rod 10 to lift the fitting 1 and send it to the outside ADSS optical cable 4 of the optical cable clamp 18 In the sky, make the wedge-shaped groove 9 on the gold body 1 surround the ADSS optical cable 4, and insert the wedge-shaped block 2 on one side into the ADSS optical cable 4 and the wedge-shaped groove 9 through another special tool for connecting the screw rod of the lengthened operating rod. The groove 7 is close to one side of the ADSS optical cable 4, and the slope of the wedge-shaped block 2 fits with the slope of one side of the wedge-shaped groove 9; in the same way, insert the wedge-shaped block 2 on the other side with the special tool for extending the operating rod screw connection The other side of the ADSS optical cable 4; press the wedge-shaped block 2 so that the optical cable groove is clamped on the ADSS optical cable 4, and the ADSS optical cable 4 is clamped; then reversely rotate the special tool for connecting the extended operating rod screw to return;

Finally, the other end of the insulating rope 16 is connected on the cross arm 15 of the pole tower, and the insulating rope 16 is straightened.

As shown in Figure 10, it is a schematic diagram of the working state of the security fittings clamped by the wedge-shaped block of the optical cable. The metal concrete 1 is clamped on the ADSS optical cable 4 outside the optical cable clamp 18. According to past accident experience and theoretical analysis, the metal concrete 1 is clamped at a distance The end of the optical cable clamp 18 is preferably about 80 to 100 mm. The metal fitting 1 is located between the anti-vibration whip 17 and the optical cable clamp 18. The anti-vibration whip 17 is spiral and is clamped on the ADSS optical cable 4 to prevent and weaken the optical cable. Vibration under the action of laminar wind. After the ADSS optical cable 4 has been in service for a long time, fatigue fracture occurs at the joint between the ADSS optical cable 4 and the optical cable clamp 18, and the broken ADSS optical cable 4 breaks away from the optical cable clamp 18 under the action of tension and gravity, and the ADSS optical cable 4 is away from the optical cable clamp 18 The metal body 1 is pulled by the insulating rope 16, so the wedge block 2 moves slightly with the ADSS optical cable 4, so that the gap between the wedge blocks 2 becomes smaller, and the degree of clamping of the ADSS optical cable 4 in the optical cable groove is tighter. Therefore, the ADSS optical cable 4 is fastened in the optical cable slot of the gold body 1, and because the metal body 1 is connected to the cross arm 15 by the insulating rope 16, the broken ADSS optical cable 4 will not directly fall from the air, but It is basically fixed at the original position, thereby preventing the occurrence of major traffic and other electrical safety accidents caused by falling when the optical cable breaks. The optical cable clamp 18 in this embodiment is a suspension clamp, which is also applicable to the strain clamp.

Finally, it should be noted that the combination of the above embodiments only illustrates the technical solution of the present invention rather than limiting it. Those of ordinary skill in the art should understand that those skilled in the art can modify or equivalently replace the specific embodiments of the present invention, but these modifications or changes are within the protection scope of the pending claims.

Claims (3)

1. " three across " ADSS optical cable wedge block clamps security personnel's fitting, it is characterized in that: including a fitting body (1) and two wedge blocks (2), be provided on fitting body (1) wedge groove (9), the shape of wedge groove (9) combined with two wedge blocks (2) after wedge-shaped phase Adaptation；The arc groove (7) of perforation, the accurate measurement and ADSS optical cable of arc groove (7) are provided on each wedge block (2) (4) outer diameter is adapted, and the arc groove (7) of two wedge blocks (2) is positioned opposite to form optical cable wire casing in wedge groove (9)；Light ADSS optical cable (4) on the outside of cable clip (18) is held in optical cable wire casing；It is wedge-shaped in the big end and fitting body (1) of wedge block (2) The big end opening of slot (9) is provided with wedge block screw hole on the big end end face of each wedge block (2) towards optical cable wire clamp (18) (6)；Pull ring (3) is connected on end face of the fitting body (1) towards optical cable wire clamp (18) and is provided with fitting screw hole (5)；Insulation One end of rope (16) is connected on pull ring (3), and the other end is connected on cross-arm (15)；Wedge block (2) is to far from optical cable wire clamp (18) when direction is mobile, the gap between two wedge blocks (2) becomes smaller, and is formed by optical cable wire casing on ADSS optical cable (4) Clamping degree increase, make ADSS optical cable (4) clamping fixed in optical cable wire casing.

2. " three across " ADSS optical cable wedge block clamps security personnel's fitting according to claim 1, it is characterized in that: the wedge block (2) material is polytetrafluoroethylene (PTFE) or PEEK, is provided in the arc groove (7) of wedge block (2) along arc axis direction Zigzag anti-skid structure.

3. " three across " ADSS optical cable wedge block clamps security personnel's fitting according to claim 1, it is characterized in that: further include by according to The lengthening operating stick screw rod that secondary rigidly connected insulating bar (10), link block (14) and double threaded screw (13) form connects specially With tool, operator connects specific purpose tool by the lengthening operating stick screw rod on shaft tower and fitting body (1) is moved to optical cable On the outside of wire clamp (18) and it is looped around wedge groove (9) on ADSS optical cable (4)；One end of insulating bar (10) is male end (11), the other end is connected with internal screw thread quick union (12)；One end of link block (14) is provided with internal thread hole, passes through the interior spiral shell Pit is connect with the threaded one end of double threaded screw (13), and the other end of link block (14) is connected with internal screw thread quick coupling (12), Link block (14) is connect by the internal screw thread quick coupling (12) of its end with the male end (11) of insulating bar (10)；It is double The other end of head screw rod (13) is adapted with the fitting screw hole (5) on fitting body (1).