"GB17957-2000" General Safety Requirements for Pneumatic Tools

Foreword

This standard mainly refers to the United States standard ANSIB186.1-1984 (( Safety regulations for portable pneumatic tools) drafted, while referencing other

This standard takes effect on June 1, 2000.

This standard is proposed and managed by the Bureau of Safe Production of the State Economic and Trade Commission of the People's Republic of China.

This standard is drafted by : Jilin Labor Protection Institute.

The main drafters of this standard : Zheng Fanying, Xiao Jianmin, and Ru Haiting.

 

1 range

This standard specifies the general safety requirements for the design, manufacture, management, use, inspection and maintenance of pneumatic tools ( hereinafter referred to as tools ) .

This standard applies to portable tools powered by compressed air used in production and construction .

This standard does not apply to pneumatic machinery and equipment.

2 reference standards

The provisions contained in the following standards are incorporated into this standard and constitute the provisions of this standard. At the time of publication, the editions indicated were valid. All standards will be revised and all parties using this standard should explore the possibility of using the latest version of the following standards.

GB2494-1995 Abrasives Safety Regulations

GB4674-1984 Grinding Machine Safety Regulations

GB / T4974-1989 compressors, drilling machines mechanical and pneumatic tools - Preferred pressures

GB/T5898-1986 Rock drilling machine and pneumatic tool noise measurement engineering method

GB8196-1987 mechanical equipment safety requirements

GB/T8910.1-1988 General rules for vibration measurement of rock drills and pneumatic tools

GB/T8910.2-1988 Rock drill and pneumatic tool vibration measurement method Measurement of impact machine

GB/T8910.3-1988 Rock drill and pneumatic tool vibration measurement method Rotary machine measurement

GB10434-1989 Hygienic standard for local vibration in workplaces

GB / T15706.1-1995 basic concepts of mechanical safety and General Design - Part 1: Basic terminology, methodology

GB / T15706.2-1995 basic concepts of mechanical safety and General Design - Part 2: Technical principles and specifications

3 Definitions

In addition to the definitions in GB/T 15706.1 , this standard also adopts the following definitions :

3.1 Manual on/off valve positiveon-offthrottle

By manually changing its switch position and maintaining the valve in the set state.

3.2 Manual pressure valve constantpressurethrottle

A normally-closed valve that is opened by the hand ( or finger ) when a certain pressure is applied to the valve's operating area and closed automatically when the pressure is removed.

3.3 Lockable Manual Pressure Valve constantpressurethrottlewithinstantreleaselock

The manual pressure valve, which can be locked in the open position, is operated by the same hand ( or finger ) as the lock and release state changes .

3.4 Locking device lockoffmeans

A device that locks the valve in the closed position.

3.5 working parts workingparts

The general name of the components installed on the front of the tool for performing various tasks, such as air shovel heads, pneumatic picks, pneumatic picks, pneumatic tampers, boring heads, drills, and the like.

4 design, manufacturing safety requirements

4.1 General

The design of tools, their accessories and accessories shall comply with the provisions of GB/T 15706.2 .

Tools should be shipped with instructions for use. Their contents should at least include : specifications and requirements for accessories and accessories ; instructions for maintenance and care ; precautions for safe use ; noise and vibration data for tools.

4.2 Materials

Materials selected for use in manufacturing tools must not have a detrimental effect on human health.

4.3 Structure

Tools should have a reliable, durable structure to ensure proper operation under different operating conditions. The tool's grip should allow the operator to control the entire tool. The total weight of the tool should not cause excessive fatigue when the operator is normally used.

4.4 Valve

Tools should have valves to control the flow of gas.

4.4.1 The valve should adopt the following three forms :

a) manual switch valve ;

b) manual pressure valve ;

c) Lockable manual pressure valve.

4.4.2 Valves shall be so designed as to minimize the possibility of dangerous operation.

4.4.3 The locking device of the valve shall ensure that no additional dangers ( such as finger grips ) will occur during use .

4.5 filter

More than 20 mesh screens or other filtration devices should be installed in the air supply line of the tool .

4.6 pipe fittings

4.6.1 Tapered pipe threads shall be used as far as possible for the joints between the nozzles and the tools of the pipe joints, and other forms of thread structures shall be used to ensure no leakage of gas. The strength of the material shall be equivalent to that of medium carbon steel.

4.6.2 Reliable anti-loosening and anti-leakage structure ports should be adopted for the joint structure of the air pipe joint and the air supply hose.

4.6.3 Detachable air fittings shall have wrench flats or other reliable clamping structures on the fittings.

4.7 Protection devices

Protective devices ( such as protective covers ) should be installed in locations where the use of the tool may be dangerous . The guard must not interfere with the function of the tool. The design and manufacture of the protective cover should meet the requirements of GB8196 . Pneumatic grinder protective cover should meet the requirements of GB4674 . Impact tools should have means to prevent the free fall of working parts, such as pneumatic head springs. Pneumatic grinders with diameters of more than 100 mm ( including 100 mm) should have devices that limit the maximum speed, such as centrifugal automatic governors.

4.8 Tooling Signs

The following parameters should be given on the label of the tool :

a) Maximum allowable air pressure ;

b) Maximum allowable operating speed.

The placard of the tool should be firmly fixed to the tool.

4.9 Noise and Vibration

The noise of the tool should comply with the current national noise limit standards. The noise measurement is carried out according to the provisions of GB/T 5898 , and the vibration measurement is carried out according to the provisions of GB/T 8910.1-8910.3 .

4.10 Grinding Tools

The design and manufacture of pneumatic grinding tools should meet the requirements of GB4674 .

The design and manufacture of abrasive tools for pneumatic grinding tools should meet the requirements of GB2494 .

5 Management Security Technical Requirements

5 Selection of tools

The sales and use unit of tools shall sell and purchase products that meet the safety requirements and have passed the inspection.

5.2 Safety Operation Procedures

Industries or enterprises should formulate specific safety operation regulations in accordance with the provisions of this standard and the tool instructions and their production processes and objects.

5.3 Safety Education Training

Personnel who manage, use, and maintain tools should conduct relevant safety education and training.

5.4 Statistical Analysis of Accidents

Casualty accidents involving the use of tools should be investigated, analyzed, reported and reported by safety management personnel.

5-5 Tool Management

Tools should be managed by someone. Technical documentation for the use, inspection and maintenance of tools, procedures and tools should be established.

5.6 Accessories and Accessories

Do not use accessories and accessories that do not meet the design specifications.

6 Use safety technology requirements

6 General

All tools should be used within the functions and scope defined in the instruction manual.

6-2 gas supply system

The piping and accessories of the entire gas supply system shall have a pressure resistance value greater than 150% of the maximum pressure in the system , and the pressure resistance value shall be greater than

1MPa,

6.2.1 Regulator

Regulators should be used when the supply pressure exceeds the rated pressure of the tool.

6-2-2 supply valve

Valves or remote switches shall be provided on the air supply line not more than 3m away from the operating position . The valve should be sealed well, the switch is flexible, and there should be no leakage after closing.

6.2.3 Air Supply Hose

A hose with oil-resistant inner surface and wear-resistant outer surface should be used. The hose should be firmly fixed to the joint.

6.2.4 hose connector

6.2.4.1 Threaded hose fittings in the application of carbon steel or material production port with considerable mechanical properties

6.2-4.2 Joints used to connect impact tools shall be made of hardened steel or materials with equivalent mechanical properties and shall have good impact and vibration resistance.

6.2-4.3 If a quick-change coupling is used between the tool or main hose and the flexible hose of the coupling tool, it shall be self-locking and shall meet the following requirements :

a) When the quick-change joint is disconnected, it should be able to automatically shut off the gas path ;

b) Quick-change joints shall be made of hardened steel or materials with equivalent wear characteristics .

c) The quick-change joint should be installed on the air supply side.

6.3 Working parts

When selecting working parts, ensure that the allowable operating speed is greater than or equal to the rated operating speed of the tool. The specifications and dimensions should be matched with the tools used.

6.4 Tool Installation and Removal

6.4.1 The installation and disassembly of tools should be carried out in accordance with the procedures recommended by the manufacturer.

6.4.2 When installing, removing and replacing working parts of the tool, close the air supply valve to shut off the air supply line. Do not point the tool at other people or the operator.

6.4.3 The selection and installation of pneumatic grinding wheel should meet the requirements of GB2494 .

6.5 Tool Improvements

When the tool is partially modified, the original design parameters must not be arbitrarily changed. The structure and materials used must meet the requirements of this standard.

66 Security Devices

Do not remove the original safety protection device. If additional safety guards should be used according to the manufacturer's recommendations. Safety guards should be kept in good condition. Do not use tools that have damaged safety guards.

6.7 Air Supply Line Configuration

6.7.1 The configuration of the gas supply pipeline should be based on the principle of not affecting the operation of operators and others and ensuring safety.

6.7.2 The air supply hose should use the entire hose as much as possible to minimize joints, and joints should be solid and reliable.

6.7.3 The air supply hose should be kept away from oil, hot surfaces and chemicals. In the harsh environment of use, protective measures should be taken, and additional layers ( such as tinplates ) should be provided , slot boards or other protective structures should be installed to prevent the hose from being damaged or broken.

6.8 Oil Supply and Filtration System

Automatic oil supply and filtration systems should be used to reduce tool failures.

6.9 Safe Operation

6.9.1 When using tools, operate strictly in accordance with the safety procedures.

6.9.2 During use, the hose should not be bent, twisted, knotted or placed on it. For tools with rings, do not use hose suspension tools. For small tools without rings, when the supply hose is used to suspend the tools, they should be hung on the channel or work area. The load strength of the hose and its accessories should not be less than 5 times the weight of the suspended load .

6.9.3 When the pressure exceeds 0.2MPa , the compressed air in the air supply line must not be used to clean the machine and blow dust.

6.9.4 When installing or removing the hose, blow the net to prevent dirt from entering the interior of the tool.

6.95 At the end of the work, first close the air supply line valve and then remove the air line and tools.

6.10 Labor Protection

6.10.1 In the hazardous work area of ​​tool operation, the nearby persons who may be in danger shall be shielded and protected, such as guard plates, fences or protective screens.

6.10.2 The operator shall wear flame retardant protective clothing when the work may generate sparks.

6.10.3 Wear eyeglasses or other eye-protection equipment when the operator is working in a situation that may cause injury to the eyes and face ( such as sparks, splashes, dust, etc. ) .

6.10.4 In the breathing zone of the operator, the dust concentration shall comply with the relevant national dust hygiene standards. Ventilation and dust removal measures or individual protective measures shall be taken in areas exceeding the standard operating area.

6.10.5 The noise of pneumatic tools working site shall comply with the national hygienic standards for workplace noise, and noise reduction measures shall be taken or personal protective equipment ( such as earplugs, earmuffs, etc. ) shall be used for the high-noise tools that cause excessive standards .

6.10.6 When the vibration intensity during operation exceeds the GB10434 standard limit, corresponding protective measures should be taken, such as wearing anti-vibration gloves, reducing working time or adopting rotation mode.

7 Inspection and Maintenance Safety Technical Requirements

7.1 General

Various tools and their gas supply systems should be regularly checked and maintained. The inspection time and frequency shall be determined by the safety management department according to the type of tool, the processing object, the frequency of use, and the time of use.

7.2 Inspection Procedure

Inspection and maintenance of tools should be performed by trained designated professionals. get on.

7.3 Lubrication

The lubricant lubrication tool should be selected according to the manufacturer's recommendations and procedures. Organic lubricants that can cause damage to the gasket must not be used in the tool's air supply system.

7.4 disable maintenance

Deactivated tools should be coated with anti-rust oil and block intake and other exposed holes to prevent dirt from entering the tool interior.

The .5 periodic safety inspections should regularly carry out safety inspections of the tools. The specific inspection items are :

a) The air source hose and the joint should be connected reliably, and the air leakage should not be loosened ; the air intake valve should be sealed well, the switch is flexible, and the entire air seal is free of air leakage.

b) The gas supply pipeline should be in good condition. If there is wear and tear, corrosion and other defects, and partial leakage, bulging phenomenon should be replaced immediately.

c) Check the protective device. If there is any phenomenon such as wear, crack or bending, it should be replaced in time.

d) Check whether the working parts are in good condition. If any cracks or defects are found, replace them immediately.

e) Check the speed and status of the tool. Rotary tools should ensure that the tool is in a good balance of rotation, impact tools should ensure that its anti-unfastening device is always intact.

7.6 Test run after repair

The repaired tools shall be tested and the test run shall be carried out at a maximum allowable operating speed of 1 min or more in a protected enclosed area. The test may be used only after passing 7.5 inspections. Test pressure should meet the requirements of GB/T4974 .

7. Signage

The label of the tool should always be kept in a clear state.

7.8 records

Records of maintenance and use of tools should be kept.

7.9 Test Instrument Calibration

Instruments used to check tool speed and air pressure should be calibrated regularly.

This article comes from the Internet and is reorganized by the China Rescue Equipment Network.