Double-hanging-point duplex double-wire-clamp suspension string suitable for plateau mountain land

Abstract

The utility model relates to the technical field of power transmission line fittings, and discloses a double-hanging-point duplex double-wire-clamp suspension string suitable for plateau mountainous regions, which comprises hanging point fittings (1), Z-shaped hanging plates (2), ball head hanging rings (3), insulators (4), socket hanging plates (5), special-shaped hanging plate combinations (6), right-angle hanging plates (7) and suspension wire clamps (8), and is characterized in that the two hanging point fittings are hung on an iron tower cross arm along the line direction to form double hanging points; the Z-shaped hanging plate is connected with the ball head hanging ring and the hanging point hardware fitting, the ball head hanging ring is connected with the two strings of insulators, and the two strings of insulators are combined and connected with the special-shaped hanging plate through the bowl head hanging plate to form duplex; and the two suspension wire clamps are connected to the special-shaped hanging plate combination through the right-angle hanging plate to form a double-wire clamp. According to the utility model, by arranging the special-shaped hanging plate combination, the suspension string meeting the requirements of duplex, double hanging points and double wire clamps at the same time is constructed, the stress balance of the whole string can be kept under the condition that the height differences of the two sides of a tangent tower are different, and the suspension string is suitable for plateau mountain power transmission lines.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission line fittings, and discloses a double-hanging-point double-connected double-line clamp suspension string applicable to plateau mountains. Background Art

[0002] The suspension string is an important part of the transmission line, and has several types such as single and double hanging points, single and double connections, and single and double line clamps. From the perspective of safety, the double-hanging-point double-connected double-line clamp suspension string has the highest reliability. At present, the double-hanging-point double-connected double-line clamp suspension string used in engineering is to install a rectangular connection plate below the double-connected string, and then connect two suspension line clamps below the rectangular connection plate. For the transmission line in plateau mountains, the terrain undulates, resulting in different height differences on both sides of the suspension string, and at the same time, the icing conditions on both sides are also different, which will result in a large difference in loads on both sides. When the existing double-hanging-point double-connected double-line clamp suspension string is directly applied to plateau mountains, there will be a situation where only one string bears most of the loads, reducing the actual safety factor of the suspension string. At the same time, due to the large suspension angle on the side with large height difference and the large load borne, the phenomenon of wire strand breakage, hull fracture and damage of the suspension line clamp is likely to occur. In addition, the suspension line clamp on the side with large height difference will deflect towards the suspension line clamp on the side with small height difference, squeezing the wire between the two, causing the wire to strand and even break.

[0003] For a double-connected suspension string for resisting height difference in mountainous areas with the existing authorized announcement number CN205429661U, changing the rectangular connection plate to two triangular connection plates can keep the double-connected suspension string in force balance and reasonable load distribution. However, the two triangular connection plates are connected by a parallel hanging plate, and there is a situation where one hanging hole affects the safety of the whole string, destroying the double-connected characteristics of the suspension string. The damage of this part will lead to the failure of the whole string, and then cause the serious consequence of wire dropping, reducing the reliability of the whole string.

[0004] In view of this, in order to improve the reliability of the transmission line and ensure the safe operation of the power grid, it is necessary to further study the double-hanging-point double-connected double-line clamp suspension string of the transmission line, and at the same time ensure the double-string characteristics of the suspension string and the balance of loads. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem of uneven force of the existing double-connected suspension string caused by the inconsistent height difference and load on both sides of the straight tower in plateau mountains, and at the same time ensure the double-connected characteristics of the suspension string, improve the reliability of the whole string, and ensure the safe operation of the power grid. The utility model provides a double-hanging-point double-connected double-line clamp suspension string applicable to plateau mountains, which solves the problem of uneven force of the existing double-connected suspension string caused by the inconsistent height difference and load on both sides of the straight tower in plateau mountains while ensuring the double-connected characteristics of the suspension string.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A double-hanging-point double-connected double-line clamp suspension string suitable for high plateaus and mountains is designed, which includes hanging-point fittings (1), Z-shaped hanging plates (2), ball-eye hanging rings (3), insulators (4), bowl-head hanging plates (5), special-shaped hanging plate combinations (6), right-angle hanging plates (7) and suspension line clamps (8). The two hanging-point fittings (1) are suspended on the cross arm of the iron tower in the line direction to form double hanging points; the Z-shaped hanging plates (2) connect the ball-eye hanging rings (3) and the hanging-point fittings (1), the ball-eye hanging rings (3) connect two strings of insulators (4), and the two strings of insulators (4) are connected to the special-shaped hanging plate combination (6) through the bowl-head hanging plates (5) to form double connection; two suspension line clamps (8) are connected to the special-shaped hanging plate combination (6) through the right-angle hanging plates (7) to form double line clamps.

[0008] Furthermore, the special-shaped hanging plate combination (6) is composed of two special-shaped hanging plates (61) and two sets of parallel hanging plates (62).

[0009] Furthermore, the special-shaped hanging plates (61) are provided with two hanging holes in both the horizontal and vertical directions, and the outer parts of the hanging holes are all rounded. Stiffening plates are arranged inside the special-shaped hanging plates (61), and the special-shaped hanging plates (61) are integrally cast from aluminum alloy; the parallel hanging plates (62) are configured with socket head cap screws, and the socket head cap screws are provided with anti-loosening buckles.

[0010] A double-hanging-point double-connected double-line clamp suspension string suitable for high plateaus and mountains proposed by the present utility model improves the reliability of the transmission line and ensures the safe operation of the power grid. The beneficial effects are as follows:

[0011] (1) The present utility model designs a special-shaped hanging plate combination to transform the existing double-hanging-point double-connected double-line clamp suspension string. The two suspension line clamps can rotate as a whole with the changes in height difference and load, so that the load is evenly distributed on the two connected suspension strings, solving the problem of uneven stress caused by the inconsistent height difference and load on both sides of the straight tower in high plateaus and mountains.

[0012] (2) The present utility model designs a special-shaped hanging plate combination, which is connected through two sets of parallel hanging plates, ensuring the double-connected characteristics of the suspension string, overcoming the problem that a single hanging hole affects the safety of the whole string. Moreover, stiffening plates are arranged inside the special-shaped hanging plates, and the special-shaped hanging plates are integrally cast from aluminum alloy, with high reliability. The parallel hanging plates are configured with socket head cap screws, which are convenient for installation.

[0013] (3) The present utility model can reduce the suspension angle at the outlet of the suspension line clamp on the large height-difference side of the straight tower, reducing the risk of wire strand breakage and damage to the hull of the suspension line clamp.

[0014] (4) When the height differences on both sides are inconsistent, the present utility model can keep the distance between the two line clamps unchanged, and there will be no phenomenon that the two line clamps squeeze the wire to cause strand separation or even strand breakage. Brief Description of the Drawings

[0015] Figure 1 FIG. 1 is a schematic structural view of a double-hanging-point double-line clamp suspension string applicable to high plateau mountains proposed by the present utility model.

[0016] Figure 2 FIG. 2 is a schematic view of a combination of special-shaped hanging plates in a double-hanging-point double-line clamp suspension string applicable to high plateau mountains proposed by the present utility model.

[0017] Figure 3 FIG. 3 is a schematic view of an existing double suspension string applied when the height differences on both sides of a high plateau mountain are inconsistent.

[0018] Figure 4 FIG. 4 is a schematic view of a double-hanging-point double-line clamp suspension string applicable to high plateau mountains proposed by the present utility model applied when the height differences on both sides of a high plateau mountain are inconsistent.

[0019] In the figures: 1 - hanging point fitting, 2 - Z-shaped hanging plate, 3 - ball head hanging ring, 4 - insulator, 5 - socket head hanging plate, 6 - special-shaped hanging plate combination, 7 - right-angle hanging plate, 8 - suspension clamp, 61 - special-shaped hanging plate, 62 - parallel hanging plate. Detailed Description of the Preferred Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Referring to Figure 1 and Figure 2 , a double-hanging-point double-line clamp suspension string applicable to high plateau mountains includes a hanging point fitting (1), a Z-shaped hanging plate (2), a ball head hanging ring (3), an insulator (4), a socket head hanging plate (5), a special-shaped hanging plate combination (6), a right-angle hanging plate (7), and a suspension clamp (8). The two hanging point fittings (1) are suspended on the tower cross-arm in the line direction to form a double-hanging point; the Z-shaped hanging plate (2) connects the ball head hanging ring (3) and the hanging point fitting (1), the ball head hanging ring (3) connects two strings of insulators (4), and the two strings of insulators (4) are connected to the special-shaped hanging plate combination (6) through the socket head hanging plate (5) to form a double connection; the two suspension clamps (8) are connected to the special-shaped hanging plate combination (6) through the right-angle hanging plate (7) to form a double-line clamp.

[0022] Furthermore, the special-shaped hanging plate combination (6) is composed of two special-shaped hanging plates (61) and two sets of parallel hanging plates (62).

[0023] Furthermore, the special-shaped hanging plate (61) is provided with two hanging holes in the horizontal direction and the vertical direction, and the outside of the hanging holes is rounded, a stiffening plate is provided inside the special-shaped hanging plate (61), and the special-shaped hanging plate (61) is integrally cast from aluminum alloy; the parallel hanging plate (62) is provided with a hexagon socket bolt, and the hexagon socket bolt is provided with an anti-loosening buckle.

[0024] Specifically, the height difference on both sides of a straight pole tower of a 110kV transmission line in a plateau mountain area is different, among which the largest height difference has a side tilt angle of 37°. When using an existing double-hanging-point double-clamp suspension string, the suspension clamp on the large height difference side will deflect toward the suspension clamp on the small height difference side, squeezing the wire between the two and causing the wire to become loose. At this time, the angle between the wire on the outlet side of the suspension clamp on the large height difference side and the suspension clamp is 33°, which is a large angle and is prone to wire bending, wire breakage, and suspension clamp hull rupture. The schematic diagram of the existing double-clamp suspension string applied to the inconsistent height difference on both sides of a plateau mountain area is shown in the figure below. Figure 3 shown.

[0025] When the utility model is adopted, the two hanging point hardware (1) can be hung on the two hanging points of the straight pole tower. When the height difference on both sides of the straight pole tower is different, the two suspension wire clamps will deflect synchronously with the special-shaped hanging plate on the conductor side, and the conductor between the two suspension wire clamps will not be squeezed; at the same time, the deflection of the special-shaped hanging plate on the conductor side along the line direction will not be transmitted to the special-shaped hanging plate on the tower side, so the two-link insulator string maintains balanced force. At this time, the angle between the conductor on the outlet side of the large height difference side wire clamp and the suspension wire clamp is 19°, which is a small angle, and it is not easy for the conductor to bend, break, or the suspension wire clamp hull to rupture. The schematic diagram of a double-hanging-point double-link double-clamp suspension string suitable for plateau mountains proposed by the utility model when applied to the plateau mountains when the height difference on both sides is inconsistent is as shown in the figure. Figure 4 shown.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-hanging-point double-connected double-clamp suspension string suitable for plateaus and mountains, comprising a hanging point hardware (1), a Z-shaped hanging plate (2), a ball head hanging ring (3), an insulator (4), a bowl head hanging plate (5), a special-shaped hanging plate combination (6), a right-angle hanging plate (7) and a suspension wire clamp (8), characterized in that: The two hanging point hardware (1) are suspended on the tower cross arm along the line direction to form a double hanging point; the Z-shaped hanging plate (2) is connected to the ball head hanging ring (3) and the hanging point hardware (1), the ball head hanging ring (3) is connected to two strings of insulators (4), and the two strings of insulators (4) are connected to the special-shaped hanging plate combination (6) through the bowl head hanging plate (5) to form a double connection; the two suspension wire clamps (8) are connected to the special-shaped hanging plate combination (6) through the right-angle hanging plate (7) to form a double wire clamp; the special-shaped hanging plate combination (6) is composed of two special-shaped hanging plates (61) and two sets of parallel hanging plates (62); the special-shaped hanging plate (61) is provided with two hanging holes in the horizontal direction and the vertical direction, the outside of the hanging holes are rounded, the inside of the special-shaped hanging plate is provided with a stiffening plate, and the special-shaped hanging plate is integrally cast with aluminum alloy; the parallel hanging plate (62) is provided with a hexagon socket bolt, and the hexagon socket bolt is provided with an anti-loosening buckle.

Images