GB/T 36865-2018 in English

In-depth interpretation of GB/T 36865—2018 National Standard for Screw Conveyors for Grain and Oil Machinery

GB/T 36865—2018 "Screw Conveyors for Grain and Oil Machinery" is an important standard in China in the field of grain and oil machinery, which mainly regulates the terminology, models, technical requirements, test methods and inspection rules of screw conveyors. This article will interpret the standard in detail from multiple dimensions.

1. Background and significance of the standard

The standard was proposed by the State Administration of Grain and Material Reserves and is managed by the National Technical Committee for Grain and Oil Standardization. It aims to unify the technical specifications of screw conveyors and improve product quality and technical level. The background of its formulation includes:

• Meet the needs of the grain and oil processing industry for efficient conveying equipment
• Standardize manufacturing processes and quality requirements
• Promote international trade and technical exchanges

2. Standard Framework Comparison Table

3. Interpretation of the core content of the standard

3.1 Terms and definitions of screw conveyors

The standard clarifies several key terms, such as:

• Screw conveyor: Mechanical equipment that uses rotating spiral blades to convey powdered or granular materials.
• Conveying capacity: The mass of the material conveyed per unit time.
• Pitch: The axial distance between two corresponding points on the mid-diameter line of two adjacent segments on the spiral blade.

3.2 Working Principle and Structural Composition

Screw conveyor is mainly composed of the following parts: trough, spiral blades, spiral shaft, end bearings, intermediate suspension bearings and drive device. Its working principle is to push the material along the trough through the rotation of the spiral blades to achieve continuous and uniform transportation.

3.3 Model compilation and basic parameters

3.4 Technical requirements

The technical requirements of the standard for screw conveyors cover the following aspects:

• Raw materials and manufacturing process: Specifies the use requirements of low-carbon steel, medium-carbon steel and other materials.
• Dimension tolerance: The tolerance range of screw diameter and pitch (see Table 3 and Table 4).
• Gap control: The maximum and minimum gap between the outer diameter of the screw and the trough (see Table 5).

4. Implementation suggestions

To ensure the effective implementation of the standard, it is recommended to take the following measures:

1. Strengthen the training of technical personnel and familiarize themselves with the content and requirements of the standard.
2. Enterprises should establish a complete quality management system to ensure that their products meet the standards.
3. Refer to the calculation methods in the appendix (such as the calculation formulas for conveying volume Q and driving power P) during the design and production process.
4. Perform regular type inspections to ensure stable product quality.