Hanging-point-free single-phase double-sleeve anti-dropping device for vertical double-split conductor of overhead transmission line

Abstract

The utility model relates to a hanging-point-free single-phase double-sleeve anti-dropping device for a vertical double-split conductor of an overhead transmission line. The hanging-point-free single-phase double-sleeve anti-dropping device comprises a hanging point plate, two first hanging rings, two wedge-shaped wire clamps and two conductor clamping devices, the wedge-shaped wire clamps are clamped and buckled at the front ends of the corresponding wire clamping devices, the wedge-shaped wire clamps are provided with single-connection hanging plates respectively, and the ends, relatively away from the wedge-shaped wire clamps, of the single-connection hanging plates are connected with the hanging point plates through the corresponding first hanging rings respectively. According to the utility model, a hanging point can be provided for installing the safety backup wire clamp on the vertical double-split conductor, so that double-connection double-hanging protection is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines. Background Technique

[0002] The transmission line operates in meteorological areas such as icing and strong winds for a long time. Due to icing and line galloping, the combined load on the conductors, ground wires, their connecting fittings, and the stressed positions of the towers increases. There are potential hazards of varying degrees of conductor and ground wire slippage, loosening of the preformed strands of OPGW optical cables, and skewing of the clamps. Moreover, traditional compression-type strain clamps may cause accidents such as clamp displacement damage, conductor fatigue and broken strands, and even conductor dropping and fracture due to galloping, resulting in power outages and huge direct economic losses. Especially for the "three-span" lines in operation, when it is necessary to install a safety backup clamp after detecting a defect in the strain clamp, there are no hanging points such as DB adjustment plates or construction holes for the single-phase two-insulator vertically double-split conductor line, resulting in the situation that the backup clamp cannot be installed from time to time, and the "double-link double-hanging" protection measure cannot be achieved, seriously affecting the safe operation of the line and posing great potential safety hazards. Content of the Utility Model

[0003] The utility model aims to provide a single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines, which can provide hanging points for installing safety backup clamps on the vertically double-split conductors to achieve the "double-link double-hanging" protection.

[0004] To solve the above technical problems, the specific solution adopted by the utility model is a single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: including a hanging point plate, two first hanging rings, two wedge-shaped clamps, and two conductor clamping devices; the wedge-shaped clamps are clamped at the front ends of the corresponding conductor clamping devices, and single-link hanging plates are respectively provided on the wedge-shaped clamps, and the ends of the single-link hanging plates relatively far from the wedge-shaped clamps are respectively connected to the hanging point plate through the corresponding first hanging rings.

[0005] As another optimized solution of the above single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: the hanging point plate includes two double-horizontal hanging plates, the front and rear ends of the two double-horizontal hanging plates are fixed by a central bolt and are arranged in a V shape, and the V-shaped angle between the two double-horizontal hanging plates is set in a direction opposite to that of the first hanging ring; the two first hanging rings are respectively fixed on the corresponding double-horizontal hanging plates.

[0006] As another optimized solution of the above single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: the outer periphery of the double-horizontal hanging plate is coated with an outer insulating and wear-resistant coating.

[0007] As another optimization solution for the above-mentioned single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: Any double horizontal hanging plate is composed of two parallel flat plates, and the first ends of the two flat plates are staggeredly overlapped with the tail ends of the other two flat plates and fixed by a central bolt.

[0008] As another optimization solution for the above-mentioned single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: A plurality of hanging holes are provided along the length direction on two mutually parallel flat plates, and two first hanging rings are respectively connected to the hanging holes on the corresponding side.

[0009] As another optimization solution for the above-mentioned single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: Hanging ears are symmetrically arranged on any wedge-shaped clamp, and a single-link hanging plate is connected to each hanging ear.

[0010] As another optimization solution for the above-mentioned single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: The ends of the two single-link hanging plates on any wedge-shaped clamp that are far away from the lifting ears are aligned and provided with connection holes.

[0011] As another optimization solution for the above-mentioned single-phase double-set anti-dropping device without hanging points for vertically double-split conductors of overhead transmission lines: The two first hanging rings are respectively connected to the corresponding single-link hanging plates through extension pull rods.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In the utility model, the wire clamping devices are respectively arranged on two double-split conductors. The wedge-shaped clamp is clamped at the front end of the wire clamping device. The wedge-shaped clamp is connected to the hanging point plate through the single-link hanging plate arranged on it. The two ends of the hanging point plate can be respectively fixed to the hanging rings on the corresponding side by bolts, so as to realize the installation of a double-link double-hanging safety backup clamp between the vertically double-split conductor lines of two single-phase two insulators, preventing the possibility of wire dropping accidents and improving the safety of the transmission line.

[0014] 2. In the preferred embodiment of the utility model, the hanging point plate is connected and composed of two double horizontal hanging plates whose head and tail ends are fixed by a central bolt, and the two double horizontal hanging plates are arranged in a V shape. There is a certain included angle between the two double horizontal hanging plates arranged in a V shape, which can prevent the stress damage of the parallel hanging plate caused by the transverse shear force. In addition, each double horizontal hanging plate is composed of two mutually parallel flat plates, and the first ends of the two flat plates are staggeredly overlapped with the tail ends of the other two flat plates, which can further avoid the shear stress damage of the double horizontal hanging plate itself caused by the transverse shear force.

[0015] 3. In the preferred embodiment of the present utility model, the outer peripheries of the two double-level hanging plates are coated with an outer insulating coating, which improves the current tolerance performance and enhances the mechanical strength, wear resistance and insulation performance of the double-level hanging plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the present utility model.

[0017] Reference numerals: 1, hanging point plate; 101, hanging hole; 102, mounting bolt; 103, central bolt; 104, double-level hanging plate; 2, first hanging ring; 3, extension tie rod; 4, single-link hanging plate; 5, wedge-shaped clamp; 6, conductor clamping device; 7, conductor; 8, strain clamp; 9, steel anchor; 10, second hanging ring; 11, insulator string; 12, large triangular connection plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solution of the present utility model will be further elaborated in detail below in combination with specific embodiments. For parts not described in detail in the following embodiments of the present utility model, such as fixing the conductor by the conductor clamping device and clamping the wedge-shaped clamp at the front end of the conductor clamping device, etc., should immediately be the prior art known or should be known to those skilled in the art.

[0019] An anti-dropping device for single-phase double-sets without hanging points of vertical double-split conductors of an overhead transmission line, as Figure 1 shown, includes a hanging point plate 1, two first hanging rings 2, two wedge-shaped clamps 5 and two conductor clamping devices 6. The two conductor clamping devices 6 are respectively used for fixing the double-split conductors 7 on the corresponding sides, and a wedge-shaped clamp 5 is respectively clamped at the front end of each conductor clamping device 6. Single-link hanging plates 4 are respectively arranged on the two wedge-shaped clamps 5, and the single-link hanging plates 4 are respectively connected to the hanging point plate 1 through one of the first hanging rings 2.

[0020] The hanging point plate 1 is arranged between the two double-split conductors 7. The double-split conductors 7 are respectively composed of an insulator string 11, a second hanging ring 10, a steel anchor 9, a strain clamp 8 and a conductor 7 that are sequentially connected and fixed to a large triangular connection plate 12 at intervals. The two ends of the hanging point plate 1 are respectively fixed to the second hanging rings 10 on the corresponding sides connected to the strain clamp 8 through bolts. Fixing the hanging point plate 1 to the second hanging ring 10 on the corresponding side can change the lateral friction force into a vertical tangential friction force, which can reduce the wear and lateral friction between the hanging point plate 1 and the fitting string formed by the second hanging ring 10, the steel anchor 9 and the strain clamp 8 on the double-split conductor 7.

[0021] The hanging point plate 1 includes two double horizontal hanging plates 104. The two double horizontal hanging plates 104 are fixedly connected by a central bolt 103. The two double horizontal hanging plates 104 fixed by the central bolt 103 are arranged in a V shape, and the included angle of the V shape is distributed towards the direction of the insulator string 11. The V-shaped arrangement between the two double horizontal hanging plates 104 can prevent stress damage to the double horizontal hanging plates 104 caused by lateral shear forces.

[0022] Each double horizontal hanging plate 104 is composed of two parallel flat plates. Each double horizontal hanging plate 104 is provided with a plurality of hanging holes 101, and the hanging holes 101 on the corresponding two flat plates correspond to each other one by one. The first ends of the two flat plates corresponding to one of the double horizontal hanging plates 104 are clamped on the upper and lower sides of the corresponding second hanging ring 10, and the connection and fixation with the corresponding second hanging ring 10 are realized by passing bolts through the aligned hanging holes 101 at the first ends of the two flat plates. The second ends of the two flat plates corresponding to the other double horizontal hanging plate 104 are clamped on the upper and lower sides of the corresponding second hanging ring 10, and then the connection and fixation with the corresponding second hanging ring 10 are realized by passing bolts through the aligned hanging holes 101 at the second ends of the two flat plates.

[0023] In addition, the second ends of the two flat plates on one of the double horizontal hanging plates 104 and the first ends of the two flat plates on the other double horizontal hanging plate 104 are arranged in an overlapping and staggered manner. The hanging holes 101 at the first and second ends of the overlapping and staggered two double horizontal hanging plates 104 are aligned, and the connection and fixation between the first and second ends of the two double horizontal hanging plates 104 are realized by passing the central bolt 103 through the aligned hanging holes 101. The overlapping and staggered arrangement between the first and second end flat plates of the two double horizontal hanging plates 104 can avoid the damage of the self-shear stress of the hanging point plate 1.

[0024] Mounting bolts 102 are respectively passed through the aligned hanging holes 101 in the middle of the two double horizontal hanging plates 104. The two first hanging rings 2 are respectively mounted on the mounting bolts 102 on the corresponding sides. The first hanging rings 2 are respectively connected to the single-link hanging plates 4 on the corresponding side wedge-shaped line clamps 5 through extension tie rods 3. The first hanging rings 2 are U-shaped, and fixing holes are opened at both ends of the open end of the U-shaped first hanging rings 2. Fixing rings are arranged at both left and right ends of the extension tie rod 3. The fixing ring of the extension tie rod 3 facing the left end of the first hanging ring 2 is arranged between and aligned with the two fixing holes. The connection and fixation between the first hanging ring 2 and the corresponding extension tie rod 3 are realized by fixing bolts passing through the aligned fixing rings and fixing holes. The single-link hanging plate 4 with adjustable elevation angle at the other end is connected to the ear of the wedge-shaped line clamp 5.

[0025] Ears are symmetrically arranged on both of the two wedge-shaped line clamps 5. A single-link hanging plate 4 is connected to each ear. Hanging ear holes for the ears to pass through and connect are arranged at one end of the two single-link hanging plates 4 connected to the corresponding wedge-shaped line clamps 5. The two single-link hanging plates 4 can adjust the elevation angle according to the installation requirements through the connection with the ears on the corresponding wedge-shaped line clamps 5.

[0026] The other ends of the two single-link hanging plates 4 are connected to the end of the extension pull rod 3 away from the first hanging ring 2. Connecting holes are respectively formed in the ends of the two single-link hanging plates 4 connected to the extension pull rod 3. The fixing ring at the right end of the extension pull rod 3 is located between the two connecting holes on the corresponding side. The extension pull rod 3 and the corresponding two single-link hanging plates 4 are fixedly connected by connecting bolts passing through the aligned connecting holes and the fixing ring therebetween.

[0027] In addition, outer insulation and wear-resistant coatings are applied to the outer peripheries of the two double horizontal hanging plates 104. The outer insulation and wear-resistant coating is a wear-resistant superhydrophobic nano-coating. This coating has extremely low surface activity, excellent hydrophobic, oleophobic and sewage discharge characteristics, significantly improving the current tolerance performance of the double horizontal hanging plates 104. Moreover, applying this coating on the double horizontal hanging plates 104 provides strong mechanical strength on their surfaces, significantly improving the wear-resistant effect of the double horizontal hanging plates 104 and further enhancing the insulation performance, opening up a new way for the use of the double horizontal hanging plates 104.

[0028] The installation and use steps of the present utility model are as follows: First, measure the entire effective installation length of the device under the tower. According to the measured effective installation length, install the wire clamp 6 on the wire 7, tighten the bolt on the wire clamp 6 but do not lock it. Then, clamp the wedge-shaped wire clamp 5 at the front end of the wire clamp 6, and after installation, slide backward along the wire clamp 6 until the wedge-shaped wire clamp 5 and the wire clamp 6 are pre-tightened. Second, connect the head and tail ends of the two V-shaped double horizontal hanging plates 104 through the central bolt 103, and then respectively install the connected double horizontal hanging plates 104 with their V-shaped angles facing the insulator string 11 on the second hanging rings 10 on both sides through bolts. Install the two first hanging rings 2 on the installation bolts 102 on the corresponding double horizontal hanging plates 104 respectively. After the two first hanging rings 2 pass through the installation bolts 102, respectively fix and connect an extension pull rod 3. The other ends of the two extension pull rods 3 are respectively fixedly connected to the two single-link hanging plates 4 with their lugs installed on the wedge-shaped wire clamp 5 on the corresponding side. Then, slide the connected wire clamp 6 together with the wedge-shaped wire clamp 5 in the direction away from the insulator string 11 until the hardware string has a certain tension.

Claims

1. A single-phase double-set anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines, characterized in that: The invention comprises a hanging point plate (1), two first hanging rings (2), two wedge-shaped wire clamps (5) and two wire clamps (6); the wedge-shaped wire clamps (5) are clamped at the front ends of the corresponding wire clamps (6); the wedge-shaped wire clamps (5) are respectively provided with single-joint hanging plates (4); the ends of the single-joint hanging plates (4) which are relatively far from the wedge-shaped wire clamps (5) are respectively connected to the hanging point plate (1) through the corresponding first hanging rings (2).

2. According to claim 1, a single-phase double-sleeve anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines, characterized in that: The hanging point plate (1) comprises two double horizontal hanging plates (104), the head and tail ends of the two double horizontal hanging plates (104) are fixed by a central bolt (103) and arranged in a V shape, and the V-shaped angle between the two double horizontal hanging plates (104) is arranged in a direction opposite to the first hanging ring (2); the two first hanging rings (2) are respectively fixed to the double horizontal hanging plates (104) on the corresponding sides.

3. According to claim 2, a single-phase double-sleeve anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines is characterized by: The outer periphery of the double horizontal cladding plate (104) is coated with an external insulating wear-resistant coating.

4. According to claim 2, a single-phase double-sleeve anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines is characterized in that: Any double horizontal hanging plate (104) is composed of two parallel flat plates, the head ends of the two flat plates are staggered and overlapped with the tail ends of the other two flat plates and fixed by a central bolt (103).

5. According to claim 4, a single-phase double-sleeve anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines is characterized in that: A plurality of hanging holes (101) are provided on two mutually parallel flat plates along their length direction, and two first hanging rings (2) are respectively connected to corresponding side hanging holes (101).

6. According to claim 1, a single-phase double-sleeve anti-dropping device for vertical double-split conductors without hanging points for overhead power transmission lines, characterized in that: Any wedge-shaped wire clamp (5) is symmetrically provided with hanging ears, and each hanging ear is connected to a single-joint hanging plate (4).

7. The vertical double-split conductor non-hanging point single-phase double-set anti-dropping device for overhead power transmission line according to claim 6, characterized in that: The two single-joint hanging plates (4) on any wedge-shaped wire clamp (5) are aligned at one end away from the lifting ear and are both provided with connection holes.

8. The overhead power transmission line vertical double-split conductor non-hanging point single-phase double-set anti-dropping device according to claim 7, characterized in that: The two first hanging rings (2) are respectively connected to corresponding single-jointed hanging plates (4) via extended pull rods (3).

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