What is a cone bottom silo
The cone bottom silo is a vertical storage device widely used in grain, building materials, chemical and other industries. Its conical bottom design can realize self-flowing unloading of materials, greatly improving loading and unloading efficiency. Compared with flat bottom silos, cone bottom silos realize fully automatic unloading through gravity, which is particularly suitable for the storage of powder and granular materials with good fluidity.
Structural composition of cone bottom silo
Body structure
Cylinder: Made of Q235B steel plate rolled and welded, the diameter is usually 3-15 meters, and the height is designed according to the capacity requirements
Conical funnel: The inclination angle is ≥45° to ensure that there is no material residue, and it is usually made of 10-16mm thick steel plate
Support frame: It is composed of H-shaped steel or steel pipe columns and needs to pass wind pressure and earthquake resistance calculations
Auxiliary system
Feeding system: There is a dust removal interface and a distributor on the top
Discharging device: The cone bottom is equipped with a pneumatic or manual gate valve, and some models are equipped with a vibration arch breaker
An All facilities: level meter, temperature sensor and explosion-proof pressure relief port
Standardized installation process (divided into six stages)
Phase 1: Foundation acceptance
Check the concrete foundation strength report (C30 and above)
Use a total station to detect the horizontality of embedded parts (error ≤ 3mm/m²)
Phase 2: Frame assembly
Column hoisting: Use a 25-ton truck crane to correct the verticality of each column (deviation <1/1000 height)
Ring beam welding: Implement segmented symmetrical welding to reduce deformation, and MT flaw detection is required after welding
Phase 3: Warehouse plate installation
Assemble from bottom to top, circle by circle, and control the misalignment of each circle of plates within 1.5mm
Use a torque wrench to tighten high-strength bolts (the final tightening torque must reach the design value ±5%)
Phase 4: Cone assembly
Pre-assemble the cone bucket on the ground, and set up a temporary support frame when hoisting the whole body
The joint between the cone and the cylinder is welded on both sides continuously, and vacuum leak detection is performed
Phase 5: Installation of auxiliary equipment
The installation of the stair platform should comply with GB4053.3 standard
Install a flexible connection sleeve at the interface between the conveying equipment and the silo
Phase 6: Pressure test
Perform 2 4-hour air tightness test (pressure maintained at 0.03MPa)
Load test, graded loading to 120% of design capacity
Installation precautions
Steel plate anti-rust treatment (such as spraying temporary anti-rust primer) is required for construction in rainy season
Preheating measures should be taken when the welding ambient temperature is lower than -5℃
The final acceptance must include a verticality test report issued by a third party
While the structure of a cone bottom silo is engineered for gravity discharge, its role in a processing facility goes much deeper. For a detailed breakdown of how these structures preserve grain quality, read our guide on the .
Conclusion
With the development of modular construction technology, the installation period of modern cone bottom silo has been shortened to 60% of the traditional construction period, but strict compliance with installation specifications is still the key to ensuring the 20-year service life of the equipment.
