GB/T 1955-2019Construction winch (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 1955-2008 "Building Windlass". The main technical changes compared with GB/T 1955-2008 as follows.

--- Revised the scope of application of the winch (see Chapter 1, Chapter 1 of the 2008 edition);

--- Removed the terms and definitions of high-speed hoist and speed hoist (2008, 3.3, 3.6);

---Modified the definition of fast winch and slow winch (see 3.1.2, 3.1.3, 2008, 3.4, 3.5);

--- Increased the representation of the hoist model code (see 4.2);

--- Increased the minimum breaking force coefficient of different cores of steel core wire rope (see Table 5);

--- Increased the braking torque requirements for non-slip hoist brakes of M6 and above (see 5.4.2);

---Modified the requirements for the strength of the fixed end of the wire rope (see 5.8.4, 5.8.4 of the 2008 edition);

---Modified the conditions for setting the rope arranging device (see 5.9.3, 5.9.3 of the 2008 edition);

--- Modified the minimum number of work cycles for the hoist reliability test (see 5.13.1, 5.13.1 for the 2008 version);

---Modified the safety factor for the calculation of welded reels (see D.2, D.1 of the 2008 edition);

--- Removed the requirements for the abolished standards JG/T 5035, JG/T 5066 (2008 version 5.6.2, 6.5.8).

1 Scope

This standard specifies the terms and definitions, classification, technical requirements, test methods, inspection rules, marking and storage of construction hoists (hereinafter referred to as "hoists").

This standard applies to winches driven by electric motors used in construction and installation projects, and winches driven by other methods can also be used for reference.

This standard also applies to hoists with up, down, horizontal and tilting moving loads.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 755 rotary motor rating and performance

GB/T 3811 crane design specification

GB/T 4942.1 The degree of protection (IP code) of the overall structure of a rotating electrical machine

GB/T 5972 crane wire rope maintenance, maintenance, inspection and scrapping

GB/T 13306 signage

GB/T 14048.1 Low-voltage switchgear and control equipment - Part 1: General

General technical conditions for GB/T 20118 wire rope

3 Terms and definitions

The following terms and definitions apply to this document.