GB/T 24675.4-2021 English PDF

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GB/T 24675.4-2021: Conservation tillage equipment - Part 4: Disc harrow
Status: Valid

GB/T 24675.4: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24675.4-2021	249	Add to Cart	3 days	Conservation tillage equipment - Part 4: Disc harrow	Valid
GB/T 24675.4-2009	399	Add to Cart	3 days	Conservation tillage equipment -- Disc harrow	Obsolete

Similar standards

GB/T 24674   GB/T 33006   GB/T 25409   GB/T 24675.2   GB/T 24675.1   GB/T 24675.6   

Basic data

Standard ID: GB/T 24675.4-2021 (GB/T24675.4-2021)
Description (Translated English): Conservation tillage equipment - Part 4: Disc harrow
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B91
Word Count Estimation: 12,144
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 24675.4-2021: Conservation tillage equipment - Part 4: Disc harrow

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Conservation tillage equipment -- Part 4: Disc harrow ICS 65:060:20 CCSB91 National Standards of People's Republic of China Replacing GB/T 24675:4-2009 Conservation tillage machinery part 4: disc harrows Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted: This document is part 4 of GB/T 24675 "Conservation tillage machinery": GB/T 24675 has published the following parts: --- Part 1: Shallow loosening machine; --- Part 2: Subsoilers; --- Part 3: Spring tines; --- Part 4: Disc harrows; --- Part 5: Stubble crushing and returning machine; --- Part 6: Straw crushing and returning machines: This document replaces GB/T 24675:4-2009 "Conservation tillage machinery disc harrow": Compared with GB/T 24675:4-2009, except In addition to structural adjustments and editorial changes, the main technical changes are as follows: a) An example of model preparation is added (see Chapter 4, Chapter 4 of the:2009 edition); b) The requirements for ploughing depth have been added (see Table 2, Table 2 of the:2009 edition); c) Changed the requirements for reliability in use (see Table 3, Table 3 of the:2009 edition); d) The technical parameters and size requirements of the rakes are added (see 5:1:2); e) Added the application of new materials for rake blades (see 5:5:1, 5:1:7 of the:2009 edition); f) A new process for welding tungsten carbide wear-resistant material on the blade edge is added (see 5:5:2); g) The requirements for the control system of the folding disc harrow are added (see 5:5:4); h) Added technical requirements for hydraulic system (see 5:5:5); i) The requirements for pressure test and oil cylinder of hydraulic oil circuit system are added (see 5:6:2); j) Added fasteners and tightening torque requirements (see 5:6:5); k) Added safety requirements for folding wide disc harrows (see 5:4:2, 5:4:4); l) The preparation and test conditions before the test are added (see Chapter 6 of 6:1:1,:2009 edition); m) Changed the reliability test method (see 6:2, 6:3 of the:2009 edition); n) Changed the classification of inspection items (see Table 4, Table 4 of the:2009 edition); o) Changed the inspection sampling judgment (see Table 5, Table 5 of the:2009 edition): Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Machinery Industry Federation: This document is under the jurisdiction of the National Agricultural Machinery Standardization Technical Committee (SAC/TC201): This document is drafted by: China Academy of Agricultural Mechanization, Jiamusi Beixin Machinery Manufacturing Co:, Ltd:, China Agricultural University, Yu Chengyijia Machinery Co:, Ltd:, Gansu Provincial Agricultural Mechanization Technology Promotion Station: The main drafters of this document: Yang Zhaowen, Yang Fugui, Li Hongwen, Dong Tao, He Chengxiu, Wang Qingjie, Yang Xuejun, Liu Lijing: The previous versions of this document and its superseded documents are as follows: ---First published in:2009 as GB/T 24675:4-2009; ---This is the first revision:

Introduction

The core content of conservation tillage is to implement no-tillage or less tillage, reduce the intensity and frequency of tillage on the soil as much as possible, and use the residues of crop residues: Stubble mulch protects the surface, and at the same time supports the corresponding agronomic cultivation techniques to protect the output capacity of the natural function of the soil: for reforming traditional agricultural It is of great importance to improve agricultural production methods, improve drought resistance, increase farmers' income, improve ecological environment, promote sustainable agricultural development, and protect land resources: strategic significance and far-reaching historical significance: It has been widely popularized in my country, and the realization of conservation tillage is inseparable from agriculture that conforms to agronomy The technical support of the equipment requires the cooperation of agricultural equipment with different operating conditions and performance, so the protective equipment is composed of different types of operations: Farming standard system: GB/T 24675 consists of the following parts: --- Part 1: Shallow loosening machine; --- Part 2: Subsoilers; --- Part 3: Spring tines; --- Part 4: Disc harrows; --- Part 5: Stubble crushing and returning machine; --- Part 6: Straw crushing and returning machines: This document is part 4 of GB/T 24675, aiming at the characteristic that a large amount of straw is covered on the land after conservation tillage is harvested: The technical requirements and test evaluation methods of disc harrows for conservation tillage are given in the field preparation, which provides a standard basis for the manufacture and product upgrading of disc harrows: Conservation tillage machinery part 4: disc harrows

1 Scope

This document specifies the model preparation, technical requirements, test methods, inspection rules, and delivery, marking, packaging, transportation of disc harrows for conservation tillage Loss and storage: This document applies to the protective tillage disc harrow (hereinafter referred to as the disc harrow) matched with the tractor:

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document: GB/T 1593 Agricultural wheeled tractor rear mounted three-point hitch 0, 1N, 1, 2N, 2, 3N, 3, 4N and 4 categories GB/T 2828:1 Counting Sampling Inspection Procedure Part 1: Lot-by-Lot Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL) GB/T 3077-2015 Alloy Structural Steel GB/T 3098:1-2010 Mechanical properties of fasteners Bolts, screws and studs GB/T 3098:2-2015 Fasteners Mechanical Properties Nuts GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components GB/T 5667 Agricultural Machinery Production Test Method GB/T 9480 Agricultural and Forestry Tractors and Machinery, Lawn and Gardening Power Machinery Operating Instructions Compilation Rules GB 10395:1 Agricultural and Forestry Machinery Safety Part 1: General GB 10396 Agricultural and Forestry Tractors and Machinery, Lawn and Garden Power Machinery Safety Signs and Hazard Graphics General GB/T 13306 Signs JB/T 5673-2015 General technical conditions for painting of agricultural and forestry tractors and implements JB/T 5994 General technical requirements for assembly JB/T 6279 Disc harrow JB/T 8574 Agricultural Machinery Product Model Compilation Rules JB/T 9832:2 Determination method of paint film adhesion performance of agricultural and forestry tractors and implements Press cutting method JB/T 10205 Hydraulic cylinder

3 Terms and Definitions

The following terms and definitions apply to this document: 3:1 conservation tillage harrowingconservationtilageharrowingtask On the stubble land that has not been tilled (after straw crushing treatment, or after subsoiling operation), complete stubble breaking (weeding, burying fertilizer and finishing before sowing) soil) work with loosening function: 3:2 Vegetation Coverage VegetationPerunitarea The mass of crop straw and weeds per unit area on the surface: ......

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