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NY/T 740-2003: Field operation quality of ditchers
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NY/T 740-2003: Field operation quality of ditchers

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Field operation quality of ditchers ICS 65.060.20 B91 People's Republic of China Agricultural Industry Standard Field ditch machinery operation quality Released on December 12,.2003 2004-03-01 implementation Published by the Ministry of Agriculture

Foreword

This standard was proposed by the Agricultural Mechanization Management Department of the Ministry of Agriculture. This standard is under the jurisdiction of the National Agricultural Machinery Standardization Technical Committee Agricultural Machinery Sub-Technical Committee. This standard was drafted. Agricultural Machinery Division of Jiangsu Agricultural Reclamation Group Corporation, Heilongjiang Agricultural Machinery Testing and Appraisal Station, Nanjing Agricultural University and Agriculture Nanjing Institute of Agricultural Mechanization, Ministry of Industry. The main drafters of this standard. Lu Ping, Wang Zhong, Zhu Yadong, He Ruiyin, Yang Xinchun, Yi Changbai. Field ditch machinery operation quality

1 Scope

This standard specifies the quality assessment indicators, testing methods and inspection rules for field trenching machinery operations. This standard is applicable to the assessment of the quality of field operations of trenching machinery.

2 Normative references

The terms in the following documents become the terms of this section by reference to this standard. The versions shown at the time of publication of this standard are valid. Standards will be revised to encourage the parties to the agreement in this section to study the latest versions of these documents. The provisions contained in the following standards constitute provisions of this standard by reference to this standard. GB/T 5262 General rules for the determination of test conditions for agricultural machinery

3 Terms and definitions

The following terms and definitions apply to this standard. The groove shape and dimensions are shown in Figure 1. 3.1 Groove The cross-sectional shape of the groove. It can be mainly divided into rectangular grooves, ladder rectangular grooves and trapezoidal grooves. 3.2 Ditch depth The vertical distance from the surface of the original surface to the bottom surface of the groove. 3.3 Ditch depth stability The degree of stability of the trenching depth when the trencher is operated under given operating conditions is expressed by the stability coefficient U of the trenching depth. 3.4 Groove width The lateral distance between the upper surface of the two trench walls and the intersection of the in-situ surface. 3.5 Bottom width The lateral distance between the lower edge of the two trench walls and the intersection of the bottom surface of the trench. 3.6 Ditch straightness The degree to which the groove shape maintains linearity. 3.7 Bottom soil thickness The average thickness of various shredded soils accumulated on the bottom surface of the ditch. 3.8 Kneading width The lateral distance between the upper and lower walls of the adjacent two grooves on the crotch. 3.9 Face width consistency The degree to which the width of the kneading surface is consistent is expressed by the calculated stability factor. ...