JB/T 51241-1999
Grain Cleaning Machine - Product Quality Grading (Internal Use)
粮食清选机 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量指标 → 4 试验方法 → 5 检验规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Indicators → 4 Test Methods → 5 Inspection Rules
Scope
This standard specifies the product quality indicators, test methods, inspection rules and grade evaluation methods for grain cleaning machines. This standard applies to product quality grading, quality inspection and grade evaluation of grain cleaning machines.
本标准规定了粮食清选机产品质量指标、试验方法、检验规则和等级评定方法。本标准适用于粮食清选机产品质量分等、质量检测和等级评定。
Normative References
Keywords
Application Summary AI generated
Manufacturers and quality inspection agencies use this standard to grade and test grain cleaning machines. It helps users determine equipment levels (qualified, first-class, premium) based on indicators like cleaning rate, impurity removal rate, and noise. This standard is crucial for ensuring the reliability and safety of grain processing equipment.
粮食清选机制造商和质检机构使用本标准来对产品进行质量分等和检测。它帮助用户根据清洁率、除杂率、噪声等指标判断设备等级（合格品、一等品、优等品）。该标准对保障粮食加工设备的可靠性和安全性至关重要。
AI Summary AI generated
This standard specifies quality grading requirements for grain cleaning machines, including operational performance (cleaning rate, impurity removal rate, loss rate, kilowatt-hour productivity), reliability (availability, mean time to first failure), noise, dust concentration, safety requirements, and assembly appearance. Products are classified into three grades: qualified, first-class, and premium. Test methods cover performance measurement, reliability assessment, and noise testing. Inspection rules follow GB/T 2828 sampling, with grade determination based on A, B, and C nonconformity categories.
本标准规定了粮食清选机的质量分等要求，包括作业性能（清洁率、除杂率、损失率、千瓦小时生产率）、可靠性（有效度、首次故障前工作时间）、噪声、粉尘浓度、安全要求及整机装配外观。产品分为合格品、一等品和优等品三个等级。试验方法涵盖性能测定、可靠性评估、噪声测量等。检验规则采用GB/T 2828抽样，按A、B、C三类不合格进行等级判定。
Key Sentences extracted from text
本标准规定了粮食清选机产品质量指标、试验方法、检验规则和等级评定方法。
粮食清选机产品按技术水平和质量水平分为合格品、一等品和优等品。
在标定生产率条件下清选小麦与水稻时，复合式清选机的性能指标应符合表1的规定，风筛式清选机的性能指标应符合表2的规定。
室外单机作业人员工作部位不大于15 mg/m3，室内固定作业不得大于10 mg/m3。
采用随机抽样，在工厂近六个月生产的产品中随机抽取。
This standard specifies the product quality indicators, test methods, inspection rules and grade evaluation methods for grain cleaning machines.
Grain cleaning machine products are divided into qualified products, first-class products and premium products according to technical level and quality level.
When cleaning wheat and rice under rated productivity conditions, the performance indicators of combined cleaning machines shall comply with the provisions of Table 1, and those of air-screen cleaning machines shall comply with the provisions of Table 2.
The working position of outdoor single-machine operators shall not be greater than 15 mg/m3, and indoor fixed operations shall not be greater than 10 mg/m3.
Random sampling is adopted, and samples are randomly selected from products produced in the factory within the recent six months.
Standard Timeline
Changes from replaced version:
- 对除杂率、千瓦小时生产率、噪声等指标进行了调整
- 增加了粉尘浓度要求
- Adjusted indicators such as impurity removal rate, kilowatt-hour productivity, and noise
- Added dust concentration requirements