CN104201632A - Adjustable power transmission line windage yaw preventing device - Google Patents

Abstract

The invention discloses an adjustable wind deflection device for transmission lines. The adjustable wind deflection device for power transmission lines is composed of a wind deflection insulator [2], a pole tower [1] and a line insulator [3] to form a triangle, and the wind deflection insulator [2] is fixed. It is non-rotatable on the tower to stop the wire [4] from driving the line insulator [3] to deflect under the action of the wind. The windproof insulator is composed of U-shaped bolts [24], fixing fittings [21], brackets [22], connecting rods [23] and special insulators [25]; the fixing fittings [21] and brackets [22] are connected by welding ; Its assembly is to fix fittings [21] and support [22] on the pole tower by U-shaped bolt [24], then one end of connecting rod [23] is fixed on the support [22], and the other end is connected to special insulator [ 25], special insulator [25] and then connect the wire [4].

Description

Adjustable transmission line anti-wind deviation device

technical field

The invention mainly relates to the field of wind deflection prevention for transmission lines in strong wind areas, in particular to an adjustable wind deflection device for transmission lines, which can be used to reduce wind deflection tripping of transmission lines. the

Background technique

In recent years, there have been more than 300 wind-bias flashovers on lines exceeding 110kV owned by the State Grid Corporation of China. Among them, 31 wind-bias flashovers occurred on 500kV transmission lines under the jurisdiction of State Grid Construction Co., Ltd., involving Jiangsu, Zhejiang, Anhui , Hubei, Henan, Shandong, Shanxi, Beijing, Inner Mongolia, Heilongjiang, Liaoning and other provinces and municipalities. From the above data, the wind-bias flashover rate of high-voltage transmission lines does not seem to be high, but unlike lightning flashover and operation shock flashover, most of the wind-bias flashovers occur under the working voltage. Due to the continuity of the wind, the wind deflection flashover trip generally cannot be successfully reclosed, which leads to the outage of the line. Operation experience shows that the current wind deflection flashover rate index can no longer meet the requirements of safe operation of the line. the

The wind deflection flashover accident is a major safety hazard for the normal operation of the power grid, and it is not easy to reclose the line after tripping due to wind deflection flashover, which seriously affects the safe and stable operation of the power system, thus causing major economic losses. "Insulator strings and jumpers Excessive wind deflection angle is the direct cause of wind deflection flashover accidents. Therefore, the wind deflection of high voltage transmission line insulator strings and jumpers has received extensive attention in the field of research and engineering. In-depth research on wind deflection of transmission line insulator strings and jumpers Angle and the minimum air gap between the wire and the tower, and the evaluation of the anti-wind flashover performance of the line has important engineering practical significance and technical and economic benefits for improving the safe operation of the power grid and the design level of the line tower. And for the existing It is very difficult to carry out wind deflection "V" series transformation for running lines. In order to reduce the impact of wind deflection on transmission lines, especially for lines that have been operating in strong wind areas, it is necessary to design a simple wind deflection device to improve the transmission line. Anti-wind deviation ability, reduce the number of power outages due to wind deviation of transmission lines. 

Contents of the invention

In order to solve the problem of wind deflection tripping of transmission lines, this invention aims to design a wind deflection insulator for transmission lines to reduce the wind deflection angle of the insulator caused by the wind deflection of the transmission line, improve the wind deflection ability of the transmission line, reduce Probability of a transmission line tripping due to wind deflection. the

The technical scheme adopted in the present invention is:

This kind of adjustable transmission line anti-wind device is composed of wind-proof insulators, pole towers and line insulators to form a triangle.

The windproof insulator is composed of U-shaped bolts, fixing fittings, brackets, connecting rods and special insulators; the fixing fittings and brackets are connected by welding; the assembly is to fix the fixing fittings and brackets on the tower through U-shaped bolts , and then fix one end of the connecting rod on the bracket, and connect the other end to a special insulator. the

There are multiple holes at the connection end of the connecting rod and the special insulator, and the distance between the holes is 3-10 cm. The total length of the connecting rod of the special insulator can be realized by adjusting the depth of the special insulator inserted into the connecting rod. the

The fixing hardware and bracket are made of stainless steel, and the connecting rod can be made of stainless steel pipe or high-strength epoxy resin pipe according to the site conditions, and the thickness of the pipe wall is not less than 0.5cm. the

Adopt the present invention to have following advantage:

1. The non-rotatable windproof insulator can ensure that the line insulator will not rotate with the wind after the line is connected to the windproof insulator.

2. Since the windproof insulator cannot be rotated, the windproof insulator may be damaged due to excessive force under the condition of high wind speed. It is composed of U-shaped bolts, fixing hardware, brackets, connecting rods and special insulators. Easy to replace. the

3. There is an adjustment hole on the connecting rod to adjust the total length of the windproof deflection insulator, which is convenient for on-site installation. the

To sum up: the adjustable transmission line wind deflection device can reduce the wind deflection angle of the insulator caused by the wind deflection of the transmission line, improve the wind deflection ability of the transmission line, and reduce the probability of transmission line tripping due to wind deflection. the

Description of drawings

Figure 1 The overall schematic diagram of the adjustable wind deflection device for transmission lines;

Figure 2 Schematic diagram of the connection of the fixed hardware bracket;

Figure 3 top view of fixing hardware;

Figure 4 schematic diagram of connecting rod;

Figure 5 schematic diagram of special insulators;

Fig. 6 Schematic diagram of "U" type bolt. the

Detailed ways

As shown in Figure 1: the adjustable wind deflection device for transmission lines consists of a wind deflection insulator [2], a pole tower [1] and a line insulator [3] to form a triangle, and the wind deflection insulator [2] is fixed on the pole tower and cannot rotate. Prevent the wire [4] from driving the line insulator [3] to deflect under the action of the wind. the

As shown in Figure 2 and Figure 3: the fixed plate of the adjustable transmission line anti-wind deflection device is composed of a fixing hardware [21] and a bracket [22]. There are four screw holes on the fixing hardware, and the diameter of the hole is 12mm, and M10 bolts can be installed . The hole spacing d3 and d4 are equal, and the spacing is 0.5cm wider than the width of the iron tower angle steel or steel plate at the installation position; the edge width d1 and d2 are equal, and the width is 1.5cm. the

As shown in Figure 4 and Figure 5: There are multiple holes at the connecting end of the connecting rod [23] and the special insulator [25], the hole spacing is 3~10cm, and the depth of the special insulator [25] inserted into the connecting rod [22] can be adjusted. Realize the total length of special insulator [25] connecting rod [22], so that the field installation of this kind of device is convenient. the

Principle of work of the present invention is: windproof deflection insulator [2] is made of U-shaped bolt [24], fixing hardware [21], support [22], connecting rod [23] and special insulator [25]. When in use, the fixing fittings [21] and the bracket [22] are fixed on the pole tower through the U-shaped bolt [24], and then one end of the connecting rod [23] is fixed on the bracket [22], and the other end is connected to a special insulator [25] , the special insulator [25] is then connected to the wire [4]. Simultaneously in order to make the windproof deflection insulator non-deformable and fractured under high winds, the fixing hardware [21] and support [22] are made of stainless steel, and the connecting rod [23] can be made of stainless steel pipe or high-strength epoxy resin pipe according to the situation on site. The wall thickness is not less than 0.5cm. the

Claims (4)

1. adjustable type power transmission line wind deflection preventive, it is characterized in that: adjustable type power transmission line wind deflection preventive forms triangle by wind-deviation insulator [2] and shaft tower [1] and line insulator [3], wind-deviation insulator [2] is fixed on shaft tower [1] not rotatable, to stop wire [4] to drive line insulator [3] deflection under wind action.

2. adjustable type power transmission line wind deflection preventive according to claim 1, is characterized in that: wind-deviation insulator [2] is by U bolt [24], fixedly gold utensil [21], support [22], connecting rod [23] and special insulation [25] form; Wherein fixedly gold utensil [21] adopts welding manner to be connected with support [22]; Its assembly be by U bolt [24] fixedly gold utensil [21] and support [22] be fixed on shaft tower, then connecting rod [23] one end is fixed on to support [22] upper, the other end connects special insulation [25], special insulation [25] connects wire [4] again.

3. connecting rod according to claim 2 [23], it is characterized in that: connecting rod [22] has a plurality of holes with the link of special insulation [25], pitch of holes is 3 ~ 10cm, the degree of depth that regulates special insulation [25] to insert connecting rod [22] can realize the total length of special insulation [25] connecting rod [22], so that install at the scene of this kind of device.

4. fixedly gold utensil according to claim 2 [21], support [22] and connecting rod [23], it is characterized in that: fixedly gold utensil [21] and support [22] are made by stainless steel, connecting rod [23] can be according to field condition by stainless steel tube or high strength epoxy resin pipe, and its pipe thickness is not less than 0.5cm.