Application object: A vertical cylindrical bulk cement storage tank with a capacity of 100 tons.

Industry: Commercial concrete mixing plant.

Core requirements:

Real time and precise inventory management: Say goodbye to experience estimation, grasp the remaining amount of cement in the tank in real time (accurate to 0.1 tons), and avoid production interruption or blind replenishment.

Production automation and precise batching: linked with the mixing plant control system (PLC), it realizes automatic and quantitative feeding of cement, ensures absolute accuracy of concrete mix proportion, and improves product quality.

Safety and efficiency improvement: Overload warning prevents structural risks, data networking optimizes the supply chain (automatically generates replenishment orders), reduces manual inspections and records.

1、 Scheme design and selection of core equipment

1. Selection of weighing module: Static load module (four point support system)

Type: Static load weighing module must be selected and installed in a combination of "1 fixed type+2 semi floating types+1 floating type". This combination can effectively release the internal stress of the tank caused by thermal expansion and contraction, wind load, and small foundation settlement, preventing stress accumulation from affecting accuracy or damaging sensors.

Quantity: 4 (corresponding to 4 legs of the tank).

Range calculation:

Tank weight (empty tank): Assuming approximately 15 tons

Maximum load capacity (cement): 100 tons

Total weight: 15+100=115 tons

Safety factor (taken as 1.25): 115 × 1.25=143.75 tons

Single module range ≥ 143.75 ÷ 4 ≈ 36 tons

Selection result: Choose a static load weighing module with a range of 40 tons. (Example brand/model: Mettler Toledo C3B or similar industrial grade module)

2. Material and Protection

Module body: Carbon steel galvanized or sprayed. Cement dust is alkaline, providing sufficient protection and high cost-effectiveness, without the need for stainless steel.

Cable and junction box: The cable sheath must be wear-resistant, and the protection level of the junction box must reach IP68 to cope with outdoor dust and rainwater environments.

3. Integration of weighing instruments and systems

Weighing transmitter/instrument: Choose high-performance digital instruments that support multi-sensor summation, digital filtering, and rich communication interfaces.

Key features: High resolution, powerful anti vibration digital filtering (to cope with feed impact and wind influence), batch control function (for automatic batching).

Communication interface: Standard RS485/Modbus RTU or Ethernet/IP for easy access to the main control PLC system of the mixing plant.

System topology: 4 weighing modules → waterproof junction box (parallel) → weighing instrument → PLC control system → upper computer monitoring software.