Three-conductor Spacer with Movable Clamps for Galloping Suppression
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Solution Overview
Problem
Three-conductor transmission lines experience galloping due to uniform snow and ice accretion, which conventional spacers fail to effectively suppress, as they either lack movable clamps or are designed for different conductor configurations.
Innovation Solution
An overhead transmission line spacer with two movable clamps and one fixed clamp, allowing rotation angles between -90° and 90°, is used to create different cross-sectional shapes of snow and ice accretion, thereby preventing uniform lift and galloping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If all three clamps are fixed clamps, then the spacer structure is simple and stable, but uniform snow and ice accretion occurs on all three overhead transmission lines causing galloping
Solution Approach 1:
The patent applies the dynamics principle by making two of the three clamps movable rather than fixed. These movable clamps can rotate about the longitudinal axis of the overhead transmission lines they hold, allowing the lines to assume different orientations. This dynamic capability prevents uniform snow and ice accretion patterns, thereby suppressing galloping while maintaining structural stability through the combination of movable and one fixed clamp.
2Object-affected harmful factors
If movable clamps are used, then snow and ice accretion shapes become different suppressing galloping, but the clamp structure becomes more complex
Solution Approach 1:
The patent applies the local quality principle by making only two of the three clamps movable, rather than all three. This localized application of movability provides sufficient variation in snow and ice accretion shapes to suppress galloping, while avoiding the unnecessary complexity of making all clamps movable. The selective placement of movable clamps optimizes the balance between galloping suppression and structural simplicity.
3Adaptability or versatility
If conventional spacers are used for two-conductor or four-conductor lines, then those configurations are covered, but three-conductor transmission lines lack appropriate spacer solutions
Solution Approach 1:
The patent applies the universality principle by designing a spacer configuration that is specifically optimized for three-conductor transmission lines, filling a gap in the existing spacer solutions. The design with two movable clamps and one fixed clamp provides a universal solution for three-conductor configurations, ensuring both adaptability to this specific conductor arrangement and reliable galloping suppression effectiveness.
Data Source
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AI summary
The present disclosure is related to providing an overhead transmission line spacer which can suppress galloping caused by strong wind in the three-conductor transmission line formed of three overhead transmission lines. An overhead transmission line spacer comprising: three clamps configured to individually hold three overhead transmission lines; and a frame body including support members and a frame portion, and configured to maintain separations between the three overhead transmission lines via the three clamps, the clamps being attached to the support members, and the frame portion maintaining separations between the support members, wherein two out of the three clamps are movable clamps, each of which is configured to hold one of the overhead transmission lines in a rotatable manner about the one of the overhead transmission lines, and one out of the three clamps is a fixed clamp configured to hold one of the overhead transmission lines without allowing rotation.