Blind Plate Switching Structure for Fast Pipeline Isolation
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Solution Overview
Problem
The existing blind plate switching process in petroleum, chemical, and offshore industries is labor-intensive and time-consuming, leading to prolonged shutdowns and safety risks, especially when dealing with toxic mediums, necessitating a faster and more efficient switching solution.
Innovation Solution
A fast blind plate switching device featuring a unique structural design with a sealing structure, clamping structure, support structure, and actuator, allowing for quick switching between open and blind states without the need for disassembling bolts, utilizing a trapezoidal thread pair for self-locking characteristics and a rolling ring for reduced friction, and operated via a hand wheel or handle in manual, pneumatic, hydraulic, or electric modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional blind plate switching procedure is used, then reliable isolation is achieved, but switching time is long and labor intensity is high
Solution Approach 1:
The device segments the blind plate into two separate plates (first blind plate and second blind plate) positioned on opposite sides of the pipeline. This allows independent manipulation of each plate, enabling faster switching operations while maintaining reliable isolation through the dual-plate configuration.
Solution Approach 2:
A pushing device acts as an intermediary mechanism between the operator and the blind plates. The pushing device includes a pushing rod that can simultaneously push both blind plates to rotate, eliminating the need for manual manipulation of each plate individually and significantly reducing switching time while maintaining isolation reliability.
2Reliability
If traditional blind plate switching procedure is used, then reliable isolation is achieved, but labor intensity is high
Solution Approach 1:
The pushing device serves as a mechanical intermediary that automates the complex manual operations. By operating the pushing device, a single operator can control both blind plates simultaneously, dramatically reducing labor intensity and operation complexity while ensuring reliable isolation through the coordinated movement of both plates.
Solution Approach 2:
The device merges the control of two separate blind plates into a single operational mechanism. The pushing rod connects both plates and enables simultaneous rotation, combining what would traditionally require separate manual operations into one unified action, thereby reducing labor intensity while maintaining isolation reliability.
3Productivity
If blind plate switching is performed quickly, then production efficiency is improved, but sealing performance may be compromised
Solution Approach 1:
The blind plates are designed with self-aligning features including guide edges and positioning structures. When the pushing device rotates the plates, these self-service features automatically ensure proper alignment and seating of the blind plates against the pipeline flanges, maintaining sealing performance even during rapid switching operations without requiring slow, careful manual alignment.
Solution Approach 2:
The sealing surfaces and contact areas of the blind plates incorporate visible indicators (such as colored rings or marked surfaces) that change position or visibility during rotation. These indicators provide real-time visual feedback to the operator about the rotation status and sealing contact, ensuring that sealing performance is maintained even during fast switching by allowing quick verification of proper seating.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device significantly reduces operation time, enhances sealing reliability, improves production efficiency, minimizes medium leakage, and ensures personnel safety by simplifying the switching process, making it suitable for industries requiring fast and efficient pipeline isolation.
Implementation Method 1
a rolling ring is further included, which is mounted outside the support ring, and the blind plate is limited by the rolling ring. The rolling ring includes an outer ring with an installation groove and a steel ball bushing. Multiple steel balls are embedded inside the steel ball bushing and placed in the installation groove.
Data Source
AI summary
A fast blind plate switching device, comprising a sealing structure, a clamping structure, a support structure and an execution mechanism. The blind plate has an open-state structure and a blind-state structure. The support structure is used for connecting pipelines at two sides and providing support for the whole device. The clamping structure and the sealing structure are located inside the support structure. The clamping structure is driven by the execution mechanism, and under the drive of the execution mechanism, the clamping structure presses on the blind plate (1) to eliminate a gap between two sides of the blind plate, so that a seal is formed by means of the sealing structure. When a gap is formed away from the blind plate (1), the open/blind state of the blind plate (1) is switched.