GB 28759-2012Green sand mixer - Safety requirements (English PDF)

3.2 Mechanical hazards

3.2.1 Mixer is not in the zero state machine, operation and maintenance personnel to enter the machine Risk of crushing sand brought, cut the risk of collision Danger.

3.2.2 grit projection hazard produced by the apparatus.

3.2.3 risk of wound produced by rotation and/or rotation motion of the device element.

3.2.4 equipment during use due to loose, loose, broken or dropped, broken, thrown dangerous may cause.

3.2.5 bump puncture or dangerous equipment surfaces, corners or edges produced.

3.2.6 generated by the surrounding high-altitude operations or equipment slips, trips, fall hazards.

3.2.7 a high pressure fluid jet system of hydraulic and pneumatic systems and/or cause dangerous bursting.

3.2.8 installation, accident during transport emphasis, poor stability, and other causes insufficient strength spreader tilting movement or fall hazard.

3.3 Electrical Hazards

3.3.1 generated from electrical shock hazard system, heat radiation risks.

3.3.2 risk of causing damage to the equipment by the rotor element failure detecting operation.

3.3.3 a drive motor and rotor blade sand due to the rotation power source miswiring errors caused by damage accelerated wear member Danger.

3.4 Noise danger Hearing loss risk of noise and other equipment.

3.5 Materials and hazardous substances produced Risk of operator contact or inhalation

3.5.1 clay, pulverized coal dust caused.

3.5.2 danger of fire or explosion resulting from the production of pulverized coal.

3.6 Other hazards By ignoring the risk of ergonomic principles of ergonomics can cause, such as easy to produce operating direction errors, inappropriate lighting, too much tension And fatigue. 4 and/or safety measures required

4.1 Basic requirements

4.1.1 The equipment should be maximized through design reduces the risk to reach intrinsically safe. By appropriate design can not be avoided or sufficiently limited Risk system, the operator should be protected using the security device.

4.1.2 Equipment safety design should be consistent with GB T 15706.1, GB/T 15706.2 provisions/and the GB 5083.

4.1.3 In addition to safety equipment shall comply with the provisions of this standard, it must also meet the requirements of GB 20905.

4.1.4 Control System components relating to security and safety requirements should be designed to meet the requirements GB/T 16855.1's.

4.1.5 Equipment design should fully reflect the principles of ergonomics, and should be consistent with GB/T 14776, GB/T 16251 and other relevant standards Provisions.

4.1.6 who can not be eliminated or sufficiently reduced by design, but also its security guards are not fully effective or ineffective legacy wind Insurance, should be through the use of user information notification and warning devices. Usage information is an integral part of the equipment. Should not use the information Designed to compensate for a defect or a safety guard in place.

4.2 Mechanical hazards safety requirements Discharge door shall be interlocked with the multi-stage rotor blade and other moving parts on the device 4.2.1; access door only when the door is in a closed state and observation State, a rotor blade and other moving parts to start. Door equipment should be accompanied by good fixed warning signs.

4.2.2 device should be well sealed, the sealing member should be able to withstand all the brunt of grit and abrasion. Doors and windows on the observation device is turned off after the There should be no sand fly.

4.2.3 The device shall be fitted with an inner wall of the shield which can withstand wear, the mounting of the shield should be strong, should be easy to replace.

4.2.4 When engaged in the installation, adjustment, servicing or maintenance of the operator is in the device, the device should be in the zero state machine, ensure that other people Members unable to start the rotor blade, hydraulic systems and other moving parts.

4.2.5 the operator easy access to the moving parts in motion (e.g., gears, shafts, drive belts, chains, blades, blade, discharging Between the door and the like), or the moving member and a stationary member, to be equipped with an effective protective device, or to take effective measures to limit, or to take limit guard Measures should not result in additional danger. Guard shall comply with GB/T 15706.2-2007 in 5.3.2. Restrictive measures should be consistent GB 23821, GB 12265.3 provisions and other relevant standards.

4.2.6 Mixer access door should be opened a mechanical limiting means, and with an opening movement of the interlock stop.

4.2.7 Mixer rotating machine basin, sand mill rotating circumference of the loop is also provided a protective door, the door should open the guard mechanical limiting means, and with a Open multistage interlock stop motion.

4.2.8 discharge gate and blade stop means should be reliable.

4.3 Electrical hazard safety requirements Electrical system

4.3.1 equipment should be GB 5226.1 prevent electrical hazards.

4.3.2 the rotor blade and the power supply wiring machine tub driving motor should ensure that the steering or steering the steering flag warning signs the requirements.

4.3.3 Control interlocking system shall be able to achieve predetermined operation sequence.

4.3.4 should have the electrical interlock function to prevent unexpected failure due to malfunction, and/or dangerous events.

4.3.5 The control system should have the necessary automatic monitoring, triggering alarm in the event of a failure and can not start before troubleshooting Moving a new cycle of work.

4.3.6 If a device has a different mode of operation, cycle mode (e.g., manual, automatic, linkage, etc.), the changeover switch should be used, and the switch Placed in the latched cabinet, but also on the working mode, circulation mode or respectively locked with a key switch having a removable handle.

4.3.7 should be equipped with stop devices on the device, the emergency stop device shall stop all movement and operation hazardous. After reset does not stop devices Should lead to re-start, stop functional requirements and design principles should be consistent with the relevant provisions of GB 16754.

4.3.8 the control system pause, stop, reset means should be initiated in any dangerous situation.

4.4 Noise dangerous security requirements

4.4.1 under idling conditions, the disc diameter of less than 2000mm Mixer sound pressure level should not exceed 80dB (A), the disc diameter is equal to or greater Mixer to 2000mm of sound pressure level should not exceed 85dB (A). Noise measuring method according to GB/T 25371 requirements.

4.4.2 Equipment should take measures to minimize the risk of noise radiation.

4.4.3 Use vent valve muffler.

4.4.4 arranged in parallel lines not in contact with each other, to prevent abnormal sound generation and noise.

4.5 Hazardous materials and substances safety requirements

4.5.1 device in use or to be provided with a dust removal system interfaced with the dust removal system.

4.5.2 dust removal system should be measures to prevent dust clogging pipes, pipe bending transition at the dust should be minimized. Fugitive dust various parts of the phenomenon should not occur during work dust removal system 4.5.3.

4.6 Other safety requirements Mixer design should make it possible to cause some parts of the body by pinching hazards minimized. Minimum among avoid crushing of parts of the human body Distance should meet the requirements of GB 12265.3.

6.3 Manual

6.3.1 instructions and shall comply with the

6.5 GB/T 9969 of GB/T 15706.2-2007. Proper repair or maintenance is essential for safety equipment operator 6.3.2, it should be emphasized in the instructions for use.

a) before any part of the operator's body placed in a danger zone, the device should first state machine is set to zero;

b) should always check whether the loosening fasteners, if loose should be secured in place;

c) power supply wiring of the rotor, and the machine bowl scraper should ensure that the drive motor turning the steering or steering flag warning signs consistent with the requirements;

d) broken or badly worn, corrosion wear blades, blade, liner should be replaced, and the like fasteners, and checked periodically;

e) All of the seal against flying sand found to be defective and should be replaced;

f) should be cleaned sticky sand mixer of the inner wall;

g) should be promptly removed Debris and other obstacles surrounding sand mill;

h) regularly lubrication points.

6.3.3 instructions shall include the following information. Parameters and characteristic data

b) sand mill design, the standard used in the production;

c) Installation Instructions (e.g., FIG mounting foundation, the foundation required, connection requirements, damping requirements, and the installation program step, installation requirements of each system And adjustment, etc.), the environmental conditions;

d) connecting the power source described in a sand mill;