CN210692227U

CN210692227U - Prevent wind Y gold utensil cluster of falling partially

Info

Publication number: CN210692227U
Application number: CN201921786467.8U
Authority: CN
Inventors: 宋刚; 沈泓; 潘峰; 吴俊俊; 郭勇; 卢彬芳
Original assignee: China Energy Engineering Group Zhejiang Electric Power Design Institute Co ltd
Current assignee: China Energy Engineering Group Zhejiang Electric Power Design Institute Co ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-06-05
Anticipated expiration: 2029-10-23

Abstract

A wind-proof inclined-falling Y hardware string comprises a yoke plate, composite insulators and a suspension clamp, wherein hanging holes are respectively formed in a top angle, a bottom angle and two side angles of the yoke plate, the hanging holes in the bottom angle of the yoke plate are connected with the suspension clamp through UB hanging plates, the hanging holes in the top angle of the yoke plate are connected with socket hanging plates through bolts, one side of each socket hanging plate is connected with the yoke plate, the other side of each socket hanging plate is connected with the vertically-arranged composite insulators, the tops of the vertically-arranged composite insulators are connected with right-angle hanging plates through socket hanging rings, the hanging holes in the two side angles of the yoke plate are respectively connected with obliquely-arranged auxiliary insulators through bolts, and the vertically-arranged composite insulators and the obliquely-arranged auxiliary insulators on the two side angles are of an inverted-Y structure; damping devices are respectively arranged at the bottoms of the auxiliary insulators; the metal fitting string has the characteristics of uniform stress distribution, high safety performance, adjustable expansion and contraction of the metal fitting string, limit value swing and the like.

Description

Prevent wind Y gold utensil cluster of falling partially

Technical Field

The utility model relates to a gold utensil cluster technical field that dangles, concretely relates to prevent wind Y gold utensil cluster of falling partially.

Background

In the power transmission and transformation circuit, the tower is mainly connected with the circuit by the tension-resistant hardware string, the tension-resistant hardware string mainly comprises a tension-resistant wire clamp and a connecting hardware fitting, the tension-resistant wire clamp is used as a key hardware fitting for bearing the mechanical performance of the circuit, and the construction quality cannot be well guaranteed due to the conditions of construction conditions, heavy construction equipment and the like of the traditional hydraulic tension-resistant wire clamp and the traditional bolt-type tension-resistant wire clamp.

The suspension strings of the tangent tower of the double-circuit transmission line of 220kV and above, which are built and put into operation at home and abroad, generally adopt I-shaped suspension insulator strings or V-shaped suspension insulator strings. The I string can swing with windage yaw under the action of horizontal wind load, the distance between the charged body and the tower body or the cross arm is close, and when the close distance is smaller than the safety clearance, the conducting wire can discharge to the iron tower. The V-shaped strings can limit the swing of the wires in the tower window, but the included angle of the V-shaped strings is not suitable to be too small, so that the cross arm of the V-shaped string tower is longer, and the tower weight is larger. The mountain area alternating current circuit more selects I cluster tangent tower. The yaw angle of the I-string is related to the ratio of the horizontal load to the vertical load applied to the I-string, and the main influencing factors are the weight of the wire, the wind speed, the value of the vertical span coefficient Kv (Kv ═ vertical span/vertical span), and the like. Under the condition that design conditions such as wires and weather are determined, designers limit the amplitude of the wind deflection and the swing of the overhanging cross wind mainly by limiting the Kv value. The larger the Kv value, the smaller the wind slip angle. In the tower type planning and designing stage, the minimum Kv value is planned for each tangent tower, and the size of the tower head is planned according to the minimum Kv value. When the actual Kv value of the iron tower is larger than the planned value, the requirement that the suspension cross wind deflection and swing do not exceed the allowable value can be met. Aiming at the tower shape with a small Kv value, the construction cost is improved by mainly adopting the rising tower height or adopting a strain tower breaking scheme at present.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a prevent wind Y gold utensil cluster that falls partially that stress distribution is even, the security performance is high, wire safety guarantee nature is high is provided.

The utility model aims at providing a prevent wind Y gold utensil cluster of falling partially, including yoke plate, composite insulator and suspension clamp, the hanging hole has been seted up on the apex angle of yoke plate, base angle and both sides angle respectively, be connected with suspension clamp through UB link plate on the hanging hole of yoke plate base angle, be connected with socket link plate through the bolt on the hanging hole of yoke plate apex angle, one side and the yoke plate of socket link plate are connected, and the opposite side is connected with the composite insulator of vertical setting, and the top of the composite insulator of vertical setting is connected with the right angle link plate through the bulb link ring, is connected with the auxiliary insulator of slant setting respectively through the bolt on the hanging hole of yoke plate both sides angle, and the composite insulator of vertical setting is the structure of falling Y shape with the auxiliary insulator of slant setting on both sides angle; and damping devices are respectively arranged at the bottoms of the auxiliary insulators.

Furthermore, damping device include U type link and damping adjustment ware, damping adjustment ware passes through U type link and connects the bottom of auxiliary insulator.

Furthermore, the hanging holes at the bottom angles of the connecting plates are connected with three suspension clamps through UB hanging plates, and the angle between every two adjacent suspension clamps is 33 degrees.

Further, the angle between the auxiliary insulators is 75 °.

The utility model has the advantages of: aiming at the characteristics that an I-shaped suspension insulator string is prone to windage yaw swing and tower head windage yaw flashover is prone to occur under the working condition of special strong wind, a novel windage yaw prevention insulator hardware string is designed. According to the string type, an auxiliary hardware string is added below an I-shaped hardware string to form an inverted Y-shaped hardware string, no stress is applied under normal working conditions, and the auxiliary insulator hardware string plays a role under horizontal tension (strong wind working condition) or longitudinal tension (uneven icing or wire breaking working condition), and is matched with a tower-shaped design to limit I swing; the yoke plate and the damping regulator in the inverted Y-shaped fitting string can realize the length regulation of the auxiliary string.

Drawings

Fig. 1 is a schematic structural view of the wind-deflection-preventing Y-shaped fitting string of the present invention;

fig. 2 is a schematic structural diagram of a 220kV double-circuit tangent tower equipped with a wind deflection prevention Y-string.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1-2, the wind-proof Y-shaped fitting string of the utility model comprises a connecting plate 5, a composite insulator 7 and a suspension clamp 3, wherein hanging holes are respectively arranged on the top angle, the bottom angle and the two side angles of the connecting plate 5, wherein the distance between the hanging holes on the two side corners is 600mm, the hanging holes on the bottom corners of the yoke plate 5 are connected with the suspension wire clamp 3 through UB hanging plates 4, the hanging holes on the top corners of the yoke plate 5 are connected with the socket hanging plates 6 through bolts, one side of the socket hanging plates 6 is connected with the yoke plate 5, the other side is connected with the vertically arranged composite insulator 7, the top of the vertically arranged composite insulator 7 is connected with the right-angle hanging plate 9 through a ball head hanging ring 8, the hanging holes on the two side corners of the yoke plate 5 are respectively connected with the obliquely arranged auxiliary insulators 10 through bolts, the vertically arranged composite insulator 7 and the auxiliary insulators 10 obliquely arranged on the two side corners are in an inverted Y-shaped structure; damping devices are respectively arranged at the bottoms of the auxiliary insulators 10.

Referring to fig. 1, the damping device includes a U-shaped suspension loop 2 and a damping adjuster 1, and the damping adjuster 1 is connected to the bottom of the auxiliary insulator 10 through the U-shaped suspension loop 2; the damping adjuster 1 is of a spring sleeve structure, when the damping adjuster is under tension, an internal spring is compressed, and the whole length is extended; when the damping regulator is pressed, an empty stroke is reserved in the damping regulator, and the spring does not work. The length of the damping regulator is 1050mm under the condition of rest and no stress, the damping regulator can be extended to 230mm to the maximum after being pulled, and the overall length is 1280 mm; the overall length under compression can be reduced to 850mm, the compression limb taken out of service, and the damper regulator has a maximum load of 160 kN.

Referring to fig. 1, three suspension clamps 3 are connected to the hanging holes at the bottom corners of the connecting plates 5 through UB hanging plates 4, and the angle between adjacent suspension clamps is 33 °.

Referring to fig. 1, the angle between the auxiliary insulators 10 is 75 °.

Referring to fig. 2, in order to match with the windage yaw prevention hardware string, a dual-loop tangent tower is specially designed, compared with a conventional dual-loop tower, the upper planes of the original lower and middle-layer cross arms can be connected with auxiliary insulators, and the lowest-layer auxiliary cross arm is newly added. The lower part of the original I-shaped insulator string is connected with an inverted V-shaped auxiliary fixed insulator string, so that windage yaw swing of the I-shaped insulator string is limited, and the length of a wire cross arm is reduced.

The implementation case is as follows:

a220 kV power transmission line in a mountain area is provided with 2X JL/G1A-630/45 leads, and a meteorological area is designed to be 25m/s wind and 10mm ice-coated. Under the condition of meeting the safety distance to the ground (trees), the height of a 4# tangent tower needs 27m, at the moment, Lh is 350, Lv is 117 and Kv is 0.334, a conventional double-loop tangent tower is adopted, the design is considered according to a 3-type tangent tower (Kv is 0.6) with the minimum Kv value, the requirement is not met, and the I-type overhanging cross wind under the heavy wind working condition is too large, so that the wind deflection flashover is caused.

The problem that the conventional double-loop linear tower is overhung when the height of the conventional double-loop linear tower is 27m, the height of the conventional double-loop linear tower is increased to 42m, the ground distance margin is large at the moment, or the conventional double-loop linear tower is changed into a tension tower, so that the problem that the overhung wind and the wind drift sway are avoided. Compared with the adoption of the wind deflection prevention Y-shaped fitting string, the two schemes have the advantages that the single-base cost is about 4 ten thousand higher and about 18 ten thousand higher respectively. Therefore, in some areas (generally 0.2-0.5) with smaller Kv values, the engineering cost can be saved by adopting the wind-proof and fall-preventing Y-string hardware string.

The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.

Claims

1. A wind-deflection-prevention Y-shaped hardware string comprises a yoke plate, a composite insulator and a suspension clamp, and is characterized in that hanging holes are respectively formed in a top angle, a bottom angle and two side angles of the yoke plate, the hanging holes in the bottom angle of the yoke plate are connected with the suspension clamp through UB hanging plates, the hanging holes in the top angle of the yoke plate are connected with a socket hanging plate through bolts, one side of the socket hanging plate is connected with the yoke plate, the other side of the socket hanging plate is connected with the vertically-arranged composite insulator, the top of the vertically-arranged composite insulator is connected with a right-angle hanging plate through a ball hanging ring, the hanging holes in the two side angles of the yoke plate are respectively connected with obliquely-arranged auxiliary insulators through bolts, and the vertically-arranged composite insulator and the obliquely-arranged auxiliary insulators on the two side angles are of an inverted Y-shaped structure; and damping devices are respectively arranged at the bottoms of the auxiliary insulators.

2. The wind-proof leaning-over-Y fitting string according to claim 1, wherein the damping device comprises a U-shaped suspension ring and a damping adjuster, and the damping adjuster is connected to the bottom of the auxiliary insulator through the U-shaped suspension ring.

3. The wind-deflection-preventing Y-shaped fitting string according to claim 1, wherein three suspension clamps are connected to the hanging holes of the bottom corners of the connecting plates through UB hanging plates, and the angle between every two adjacent suspension clamps is 33 degrees.

4. The windage yaw prevention Y set string according to claim 2 or 3, wherein the angle between the auxiliary insulators is 75 °.