Weighable Raw Coal Bunker Support Device for Thermal Power Plants
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Solution Overview
Problem
Current methods for measuring coal quantity in raw coal bunkers, such as using ultrasonic meters and millimeter wave radar, are hindered by coal dust and water vapor interference, leading to inaccurate measurements due to uneven coal distribution and the need for precise weighing sensors, which is challenging to implement safely and cost-effectively.
Innovation Solution
A support device comprising a base, positioning sleeve, upper support, and weighing sensor, with a sensor groove and limiting baffle, allows for precise weight measurement by ensuring the weighing sensor is securely positioned and easily maintained, using a jacking plate for safe sensor replacement and calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weighing sensors are installed to directly measure coal weight, then measurement precision is improved, but device complexity and installation difficulty increase due to the need for floating bunker structure
Solution Approach 1:
The support device segments the weighing function from the bunker structure by using multiple independent support points with individual sensors. Each support point (first support point, second support point, etc.) independently measures local weight, and the control system aggregates these measurements to determine total coal weight, avoiding the need for a completely floating bunker structure.
Solution Approach 2:
The patent introduces a control system as an intermediary that receives signals from multiple weighing sensors at different support points and calculates the total coal weight. This intermediary processing layer simplifies the mechanical structure by allowing the bunker to remain fixed on the foundation while still achieving precise weighing through distributed sensing and computational aggregation.
2Device complexity
If hinge fulcrum method is used for weighing, then device complexity is reduced, but measurement precision deteriorates due to uneven coal distribution
Solution Approach 1:
Instead of using a single hinge fulcrum point, the patent divides the support structure into multiple independent support points (first support point, second support point, third support point, fourth support point), each equipped with its own weighing sensor. This segmentation allows the system to capture weight distribution across different locations, compensating for uneven coal distribution and improving overall measurement accuracy.
Solution Approach 2:
The patent uses more support points and sensors than the minimum required (excessive action) to ensure accurate measurement despite uneven coal distribution. By placing sensors at multiple locations around the bunker perimeter, the system gathers more data points than strictly necessary, allowing for more robust weight calculation that accounts for non-uniform coal stacking patterns.
3Stability of the object's composition
If multiple support points are used, then stability is improved, but weighing sensor arrangement difficulty increases due to coaxial alignment requirements
Solution Approach 1:
The support devices are designed with universal mounting capabilities that can accommodate various bunker configurations. Each support device can function both as a structural support element and as a weighing sensor mounting point, eliminating the need for separate coaxial alignment of fulcrums and sensors. The devices can be installed at different locations around the bunker perimeter without requiring precise radial alignment.
Solution Approach 2:
The patent uses identical or similar support devices at multiple locations around the bunker (first support device, second support device, etc.). Each device has the same structure and sensor mounting configuration, allowing for standardized installation procedures. This replication of the same design at multiple points simplifies installation since the same mounting process can be repeated without complex coordination between different locations.
4Reliability
If fixed civil foundation is used, then operational safety is improved, but weighing capability deteriorates due to inability to achieve floating state
Solution Approach 1:
The patent segments the weighing function from the structural support function. The fixed civil foundation provides stable structural support and operational safety, while separate weighing sensors mounted on the support devices measure the coal weight. The control system processes these sensor readings to determine coal quantity, allowing both fixed foundation stability and accurate weighing to coexist without requiring a floating bunker structure.
Data Source
AI summary
The present invention relates to a support device used in weighing coal of a raw coal bunker in a thermal power plant and a weighable raw coal bunker. The support device includes a base, a positioning sleeve, an upper support and a weighing sensor, a sensor groove being provided in the middle of the base, the weighing sensor being arranged in the sensor groove, the positioning sleeve being arranged on the base in a covering mode, a positioning hole being provided in the middle of the positioning sleeve, the upper support being movably inserted in the positioning hole, and a bottom surface of the upper support penetrating the positioning hole to abut against a top surface of the weighing sensor. The raw coal bunker uses the support device. Compared with the prior art, the present invention effectively meets the weighing requirement of the raw coal bunker.