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NB/T 10341.2-2019Code for Design of Hoists for Hydropower Projects - Part 2: Code for Design of Mobile Hoists (English PDF)

水电工程启闭机设计规范第2部分：移动式启闭机设计规范

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 30, 2019

Implementation date

July 1, 2020

Scope

NB/T 10341.2-2019 is the English-translated version of 水电工程启闭机设计规范第2部分：移动式启闭机设计规范.

NB/T 10341.2-2019 is the Chinese standard "Code for Design of Hoists for Hydropower Projects - Part 2: Code for Design of Mobile Hoists". Its scope clause reads: In order to standardize the design of mobile hoist for hydropower projects, this code is formulated.

This code applies to hydropower projects that are mainly driven by electricity and run on tracks for opening and closing gates and blocking pollution. Mobile hoist design for grid and equipment maintenance.

The design of mobile hoist for hydropower projects shall not only conform to this code, but also conform to the current relevant national standards Provisions. Its clauses include general; term; basic regulations.

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Document preview — NB/T 10341.2-2019

National Standard of the People's Republic of China

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 layout5
4.2 Mechanism Design6
4.3 Windproof and anti-skid calculation8
4.4 Anti-corrosion9
5 Load11
5.1 Conventional load11
5.2 Incidental load12
5.3 Special loads14
5.4 Other loads15
6 Materials16
6.1 Casting16
6.2 Forgings and rolled parts16
6.3 Structural parts16
6.4 Connecting materials17
7 Machinery18
7.1 Lifting mechanism18
7.2 Operating mechanism20
7.3 Slewing mechanism22
7.4 Calculation principles of components24
7.5 Design of components26
8 Structure35
8.1 Calculation principle35
8.2 Load combinations35
8.3 Allowable stress36
8.4 Strength calculation of structural parts and connections37
8.5 Stability calculation40
8.6 Stiffness requirements47
8.7 Door frame structure48
8.8 Construction requirements49
9 Electrical54
9.1 General provisions54
9.2 Power and power supply54
9.3 Power Distribution System55
9.4 Electrical protection55
9.5 Electrical Control57
9.6 Working environment of electrical equipment61
9.7 Wires and cables and their laying61
9.8 Hydraulic automatic hanging off beam63
9.9 Auxiliary electrical equipment64
10 Security65
10.1 Basic safety requirements65
10.2 Structural safety requirements66
10.3 Mechanical safety requirements68
10.4 Electrical safety requirements69
10.5 Safety and arrangement of control and manipulation69
10.6 Requirements for the setting of safety protection devices70
10.7 Fire71
10.8 Use maintenance files71
Appendix A Series Parameters of Rated Hoisting Load, Head, Span and Speed72
Appendix B Running acceleration and deceleration and corresponding acceleration and deceleration time73
Appendix C Windward Area and Wind Coefficient74
Appendix D Calculation of horizontal lateral load when hoisting gear is operating in skewed operation79
Appendix E Motor Selection82
Appendix F Motor overload check87
Appendix G Thermal Calibration of Motor89
Appendix H Mechanical Transmission Efficiency91
Appendix J Calculation of Running Friction Resistance and Ramp Resistance92
Appendix K Calculation of Parts94
Appendix L Allowable values of commonly used sliding bearing materials0
Appendix M Stability Coefficient of Axial Compression Components1
Appendix N Lateral Buckling Stability Coefficient of Bending Members8
Appendix P Overall stability calculation of compression-bending members11
Appendix Q Calculation of Local Stability of Plate14
Appendix R Correction Coefficient of Conductor Ampacity21
Explanation of terms used in this specification23
List of Reference Standards24
Attachment. Article description27

1 General

1.0.1

In order to standardize the design of mobile hoist for hydropower projects, this code is formulated.

1.0.2

This code applies to hydropower projects that are mainly driven by electricity and run on tracks for opening and closing gates and blocking pollution.

Mobile hoist design for grid and equipment maintenance.

1.0.3

The design of mobile hoist for hydropower projects shall not only conform to this code, but also conform to the current relevant national standards

Provisions.

2 term

2.0.1 mobile hoist

Driven by a motor and driven by gears, the gates, trash racks and inspections are opened and closed via the reel, pulley block and lifting parts.

Repairing equipment, moving on rails and other cyclic operations machinery. Mobile hoist is divided into door hoist, trolley hoist

Shut-down and bridge hoist and other types.

2.0.2 supporting brake

A mechanical normally closed brake for braking and stopping is set on the high-speed shaft of the reducer.

2.0.3 safety brake

A mechanical normally closed brake that plays a braking role is set on the reel device.

2.0.4 closed gear transmission

The gear pairs at all levels from the motor to the reel shaft are in a closed box and have a well-lubricated transmission.

2.0.5 broken line groove drum

Each pitch rope groove is crossed by a rope groove parallel to a plane perpendicular to the axis of the reel and a plane perpendicular to the axis of the reel.

A reel with alternating angular rope grooves.

2.0.6 duty class

Consider the changes in load, the utilization of working hours and the nature of gate work, and determine the characteristics of the hoist.

2.0.7 automatic lifting beam

A device that can automatically connect and disconnect gates and hoists.

3 Basic regulations

3.0.1

During the design of the gate hoist and its parts, the working level of the gate hoist and its components shall be divided, including the whole

Machine classification and institutional classification.

3.0.2

The use level of the gate hoist shall meet the requirements of Table 3.0.2-1;...

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 135 pages — is available in the English PDF.

Similar standards

NB/T 10341.1-2019|NB/T 10341.3-2019|NB/T 35051-2015|NB/T 35036-2014|NB/T 11556-2024|NB/T 11557-2024

Editions of NB/T 10341.2

Edition	Title	Revision	Status
NB/T 10341.2-2019	Code for Design of Hoists for Hydropower Projects - Part 2: Code for Design of Mobile Hoists	current edition	Current
DL/T 5167-2002	Code for Design of Hoists for Hydropower Projects - Part 2: Code for Design of Mobile Hoists	previous edition	Superseded

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