SL 41-1993 in English

This standard is applicable to fixed gate hoist and mobile gate hoist that mainly adopt electric drive to open and close gate and trash rack in hydropower project. Fixed gate hoist includes different types, such as winding type, screw-rod type, hydraulic hoist and chain-type, and mobile gate hoist includes portal hoist, trolley hoist and bridge hoist.

1. Scope
2. Normative Reference
3. Basic Symbols
4. General Provisions
5. Design Principle and Requirements
6. Load
7. Material
8. Mechanism
9. Structure
10. Electrics
Annex A Hoisting Force, Lift Head, Span and Speed Series of Gate Hoist Date and Example of Working Class of Gate Hoist
Annex B Recommended Values of Acceleration (Deceleration) of Running Mechanism and Corresponding Acceleration (Deceleration) Time
Annex C Calculation Method of Horizontal Lateral Force Ps during Oblique Running of Gate Hoist
Annex D Calculation Data of Wind Load
Annex E Permissible Physical Quantity of Commonly-used Friction Surface Material
Annex F Friction Coefficient and Efficiency
Annex G Relevant Calculation Data of Parts and Track
Annex H Calculation Data for the Hydraulic Gate Hoist
Annex I Materials for Calculating Stability of Two-way or One-way Bending Members
Annex J Overload check of motor
Annex K Heating inspection of winding-type asynchronous motor
Annex L The allowable output capability (P) of YZR series electromotor under different load duration factor (FC value) and under different CZ values (the average startup multiples K= 1.7)
Annex M The electromotor of gate hoist mechanism FC, CZ and G values in the capacity selection calculation
Annex N Current-carrying capacity of conducting wire
Annex O Explanations on the Text Description
Additional Explanations