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NB/T 10341.3-2019Code for Design of Hoists for Hydropower Projects - Part 3: Code for Design of Screw Hoists (English PDF)

水电工程启闭机设计规范第3部分：螺杆式启闭机设计规范

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 30, 2019

Implementation date

July 1, 2020

Scope

NB/T 10341.3-2019 is the English-translated version of 水电工程启闭机设计规范第3部分：螺杆式启闭机设计规范.

NB/T 10341.3-2019 covers screw hoists, the third part of the Chinese energy industry code for hoist design at hydropower projects. It classifies screw hoists, including swing types used to lift radial gates and rolling screw designs, and gives model and series parameters with an expanded range of hoisting forces.

The machinery clauses deal with the lifting screw and load-bearing nut, trapezoidal thread profiles, friction coefficients and the drive mechanism, while other chapters set loads, materials, allowable stresses, frames and embedded parts, anti-corrosion, electrical control, lighting, grounding and lightning protection.

A safety chapter covers marks, nameplates and maintenance files. It replaces the screw hoist provisions of DL/T 5167-2002 as well as SD 297-88 and SD 298-88. Issued on 30 December 2019, it has applied since 1 July 2020.

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Document preview — NB/T 10341.3-2019

National Standard of the People's Republic of China

ICS: 27.140
Classification: P 26
Replacing: DL/T 5167-2002

Issued by: National Energy Administration of the People's Republic of China

1 General1
2 Terminology2
3 Basic regulations3
4 Design principles and requirements5
4.1 General provisions5
4.2 Selection and configuration6
4.3 Transmission mechanism6
4.4 Frame and embedded parts7
4.5 Safety protection device7
4.6 Anti-corrosion7
5 Load8
6 Materials9
6.1 Casting9
6.2 Forgings and rolled parts9
6.3 Structural parts10
6.4 Connecting materials10
7 Machinery12
7.1 Lifting screw and load-bearing nut12
7.2 Drive mechanism and parts17
8 Structure23
8.1 Calculation principle23
8.2 Load combinations23
8.3 Allowable stress23
8.4 Strength calculation of structural parts and connections28
9 Electrical33
9.1 General regulations33
9.2 Power supply33
9.3 Control and protection devices33
9.4 Lighting, signal34
9.5 Grounding, lightning protection34
10 Security35
10.1 Marks, nameplates, safety signs35
10.2 Mechanical, structural, electrical, and fire safety requirements35
10.3 Using maintenance files36
Appendix A Model and Series Parameters of Screw Hoist37
Appendix B Design profile and design profile dimensions of trapezoidal thread40
Appendix C Friction Coefficient and Efficiency42
Appendix D Stability Coefficient of Eccentric Compression43
Appendix E Power Correction for Motor Operating Environment46
Appendix F Allowable values of commonly used sliding bearing materials Explanation of terms used in this specification48

Foreword

According to the "National Energy Administration on the issue of the 2015 energy sector industry standard system (revision)

According to the requirements of the "Notice of the Plan" (Guoneng Technology (2015) No. 283), the specification compilation team has been extensively Investigate and research, seriously sum up practical experience, refer to relevant domestic advanced standards, and extensively collect On the basis of soliciting opinions, revise this specification.

The main technical content of this code is. basic regulations, design principles and requirements, loads, Materials, machinery, structure, electrical, safety. The main technical content of this specification revision is.

This code replaces "Code for Design of Hoist Gear for Hydropower and Water Conservancy Projects" DL/T 5167-2002 The relevant content of the screw hoist design in the article; this specification replaces the "QL type screw hoist Machine series parameters" SD 297-88 and "QL type screw hoist technical conditions" SD 298-88. -Added the classification of screw hoist.

-Added the relevant regulations for the swing type screw hoist to lift the arc gate. -Added anti-corrosion regulations.

-Increased the requirement of welding structure for the base and chassis. -Added the design requirements of the rolling screw hoist. -Added "Security" chapter. -Adjusted the material table of the load-bearing nut.

-Adjusted the model and series parameters of the screw hoist, and expanded the hoisting force series.

-The requirement that the rise angle of the thread center line is not less than 4° has been deleted.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 55 pages — is available in the English PDF.

Similar standards

NB/T 10341.1-2019|NB/T 10341.2-2019|NB/T 35051-2015|NB/T 35036-2014|NB/T 11556-2024|NB/T 11557-2024

Editions of NB/T 10341.3

Edition	Title	Revision	Status
NB/T 10341.3-2019	Code for Design of Hoists for Hydropower Projects - Part 3: Code for Design of Screw Hoists	current edition	Current
DL/T 5167-2002	Code for Design of Hoists for Hydropower Projects - Part 3: Code for Design of Screw Hoists	previous edition	Superseded

This page sells the current edition, NB/T 10341.3-2019. Earlier editions are listed for reference only.

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