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NB/T 11451-2023Transfer, crushing and screening device for gate roads in coal mines (English PDF)

顺槽用转运破碎筛分装置

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 28, 2023

Implementation date

June 28, 2024

Scope

NB/T 11451-2023 is the English-translated version of 顺槽用转运破碎筛分装置.

NB/T 11451-2023 sets energy industry requirements for the transfer, crushing and screening devices installed in the gate roads of underground coal mines. It classifies the equipment by type, explains model designation and lists basic parameters, safety and complete-machine requirements.

Separate clauses address the transfer unit, grid screening unit, roller screening unit, wheel-type crushing unit and roller crushing unit, together with main components such as round link chains, reducers and hydraulic couplings.

Testing comprises appearance and dimension checks, an idle running test, determination of processing capacity and checks of the associated electrical equipment, backed by factory and type inspection rules and an informative annex on the safety factor of mining round link chains. Issued on 28 December 2023, it has applied since 28 June 2024.

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Document preview — NB/T 11451-2023

National Standard of the People's Republic of China

Classification: D 93

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Type and model compilation
4.1 Type
4.2 Model compilation
5 Technical Requirements
5.1 Applicable conditions
5.2 Basic parameters
5.3 Basic Requirements
5.4 Safety requirements
5.5 Machine Requirements
5.6 Appearance requirements
5.7 Technical requirements for transfer units
5.8 Technical requirements for grid screening units
5.9 Technical requirements for roller screening units
5.10 Technical requirements for wheeled crushing units
5.11 Technical requirements for roller crushing unit
5.12 Technical requirements for main components and accessories
6 Test methods
6.1 Test conditions
6.2 Appearance and Dimension Inspection
6.3 Idle running test
6.4 Processing capacity determination
6.5 Test methods for supporting electrical equipment
7 Inspection Rules
7.1 Inspection category
7.2 Factory Inspection
7.3 Type inspection
8 Marking, packaging, transportation and storage
Appendix A (Informative) Safety factor calculation formula for round link chains for mining use

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

1 Scope

This document specifies the types and model compilation, technical requirements, test methods, inspection rules, markings, Packaging, transportation and storage.

This document is applicable to the design, manufacture and inspection of transfer crushing and screening equipment for underground coal mine chutes.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 1184 Shape and position tolerances without tolerance values

GB/T 1348 Ductile iron castings

GB/T 3836.1 Explosive atmospheres Part 1: General requirements for equipment

GB/T 3836.2 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"

GB/T 3836.3 Explosive atmospheres Part 3: Equipment protected by increased safety "e"

GB/T 3836.4 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"

GB/T 5680 Austenitic manganese steel castings

GB/T 9440 Forgeable iron castings

GB/T 11352 Carbon steel castings for general engineering

GB/T 12718 High-strength round link chain for mining

GB/T 13306 Labels

GB/T 24503 Round link chain drive sprockets for mining

JB/T 9593.1 Technical requirements for flameproof three-phase asynchronous motors for use in coal mines Part 1: YBK3 series flameproof three-phase asynchronous motors for use in underground coal mines Three-phase asynchronous motor (frame size 80~355)

MT/T 71 Open-end connecting rings for round link chains for mining

MT/T 99 Flat link for round link chain for mining

MT/T 113 General test methods and judgment rules for flame retardancy and antistatic properties of polymer products used in underground coal mines

MT/T 148 Reducer for Scraper Conveyor

MT/T 150 General technical requirements for packaging of scraper conveyors and transfer machines

MT/T 154.1 Coal mine electromechanical product model compilation method Part 1: Guidelines

MT/T 208 Hydraulic coupling for scraper conveyor

MT/T 243 High water content flame retardant fluid for hydraulic couplings in coal mines

MT/T 249 YBSD series mining flameproof double speed three-phase asynchronous motor

MT/T 374 Flame retardant V-belts for coal mines

MT/T 478 YBS series flameproof three-phase asynchronous motor for conveyor

MT/T 661-2011 General technical requirements for electrical equipment used in underground coal mines

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.

Referenced standards

Normative references

MT/T 113 · MT/T 150 · MT/T 208 · MT/T 243 · MT/T 374

Similar standards

NB/T 11520-2024|GB/T 5095.2307-2021|NB/T 11523-2024|NB/T 11536-2024|NB/T 11546-2024|NB/T 11547-2024

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