Cuboid Thyristor Trigger Shell for Compact Valve Installation
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Solution Overview
Problem
The existing shell structures for thyristor trigger units in high-voltage DC converter valves face challenges such as poor anti-interference capabilities, complex installation due to flat shell bodies, difficulty in signal measurement, and cumbersome commissioning processes, especially when using narrow radiators or requiring frequent disconnection of optical fibers and cables.
Innovation Solution
A shell structure with a cuboid design featuring a square retaining plate, triangular stiffener plates, and a side plate that forms a closed six-face structure, incorporating weep holes for water drainage, power cable holes, optical fiber holes, and fixing mechanisms to facilitate compact installation, easy commissioning, and improved accessibility for signal measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the shell body is made flat and anchor screws are located on the side, then the structure is simple and space-saving, but it becomes difficult to reach inside the shell to align anchor points during installation
Solution Approach 1:
The patent transitions from a flat shell structure to a three-dimensional cuboid structure with depth. This dimensional change creates an accessible opening that allows hands and tools to reach inside for aligning anchor points, while maintaining compact overall dimensions through the cuboid geometry.
Solution Approach 2:
The shell is divided into multiple functional panels (front panel with opening, rear panel, side panels, top panel, bottom panel). This segmentation allows the front panel to provide accessibility while other panels maintain structural integrity and compactness, resolving the contradiction between accessibility and space efficiency.
2Ease of operation
If the bottom retaining plate is made broad to facilitate circuit board installation, then the fixing is easier, but the shell requires more installation space and cannot be used with narrow radiators
Solution Approach 1:
The patent moves circuit board mounting from the bottom surface to the rear vertical panel. This dimensional relocation allows the bottom panel to be narrow (fitting compact radiators) while the rear panel provides sufficient area for circuit board installation and fixing, resolving the space contradiction.
3Productivity
If optical fibers and cables pass through holes in the upper housing, then the connections are established, but the housing cannot be removed during commissioning without disconnecting these fragile components
Solution Approach 1:
The patent extracts the cable and optical fiber penetration function from the housing structure itself. By providing separate penetration paths through side panels and the bottom panel, the housing front panel can be independently removed for commissioning without affecting cable connections, resolving the accessibility contradiction.
4Volume of moving object
If the shell structure is compact to save space, then the valve layout is improved, but it becomes difficult to extend probes for signal measurement during commissioning
Solution Approach 1:
The patent creates a three-dimensional cuboid structure with a front opening, providing vertical and lateral access paths for probes. This allows compact horizontal footprint while maintaining probe accessibility from the front and sides, resolving the measurement accessibility contradiction.
Data Source
AI summary
A shell structure for a thyristor trigger unit comprises an integrally-formed shell body with a holder and a cuboid structure, and a side plate. The cuboid structure is a cuboid with an opening in its front where an open face is formed at the front opening of the cuboid. The cuboid further includes a rear panel, a left panel, a right panel, an upper panel, and a lower panel. The holder includes a square retaining plate and two triangular stiffener plates. The square retaining plate is formed by a bottom panel extending towards a side of the left panel in a long side direction of the cuboid while the triangular stiffener plates are fixedly connected between the square retaining plate and the left panel. The side plate is mated with and detachably mounted on the open face to produce a sealed 6-face cuboid structure by sealing off said open face.