Instruction on labor protection for the mixer driver (operator) of asphalt concrete

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OCCUPATIONAL SAFETY AND HEALTH
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Instructions on labor protection for the mixer driver (operator) of asphalt concrete. Full Document

Occupational Safety and Health

Occupational Safety and Health / Standard instructions for labor protection

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1. General provisions

1.1. Individuals who have reached the age of 18, are recognized as fit for this work by a medical commission, and also have a certificate for the right to work as an asphalt concrete mixer driver (operator) are allowed to work independently as an asphalt concrete mixer driver (operator).

1.2. The asphalt concrete mixer driver who is hired must undergo an introductory briefing on labor protection, industrial sanitation, fire safety, techniques and methods of providing first aid to victims, must be familiarized with the working conditions, rights and benefits for working in harmful and dangerous working conditions, rules of conduct in case of accidents.

Before starting work directly at the workplace, the asphalt concrete mixer operator must undergo an initial briefing on safe work practices.

Appropriate entries are made about the introductory briefing and briefing at the workplace in the Registration Log for introductory briefings on labor protection issues and the Register for registration of briefings on labor protection issues. At the same time, the signatures of both the one who was instructed and the one who instructed are required.

1.3. The asphalt concrete mixer driver after the initial briefing at the workplace must undergo an internship for 2-15 shifts (depending on length of service, experience and nature of work) under the guidance of an experienced qualified asphalt concrete mixer operator, who is appointed by order (instruction) of the road organization.

1.4. Repeated briefing on the rules and methods of safe work and labor protection for the asphalt concrete mixer operator must pass:

periodically, at least once a quarter;
with unsatisfactory knowledge of labor protection no later than a month;
in connection with an admitted case of injury or violation of labor protection requirements that did not lead to injury.

1.5. The asphalt concrete mixer operator must work in overalls and footwear provided for by the Model Industry Standards: cotton overalls, combined mittens, leather boots.

1.6. The mixer driver (operator) a / b must know the operating instructions for the asphalt concrete plant.

1.7. All fire-hazardous places of aviation (asphalt-concrete installations, bitumen-smelting plants, bitumen storage facilities) must have shields with fire-fighting equipment and equipment, fire extinguishers with charged cylinders, reservoirs, hoses with hoses, pumps for water supply, boxes with dry, clean sand, which are closed with lids.

Smoking is allowed only in specially designated areas.

To extinguish flared bitumen or fuel, it is necessary to use carbon dioxide fire extinguishers and sand or extinguish the source of fire with a tarpaulin (felt felt, covers, etc.).

1.8. At the workplace of the mixer operator (operator) there should be a first aid kit with medicines and first aid equipment for victims, as well as a thermally insulated tank for drinking water.

1.9. The bitumen storage should be surrounded by a fence made of fireproof materials at least 1 m high.

1.10. At night, the territory of the airport should be well lit and provide the operator with an overview of machinery and equipment.

1.11. It is forbidden to stay in the working area for persons not related to the maintenance of machines and installations.

1.12. To ensure safe working conditions for the operator when servicing process equipment in conveyor galleries and trenches located under piles of crushed stone and sand between the conveyor and the wall, there must be a passage with a width of at least 0,7 m, and between two conveyors - at least 1 m; the height of the passages is at least 1,9 m, and the gap between the highest part of the conveyor and the ceiling must be at least 0,6 m, and from the transported cargo - at least 0,3 m to the ceiling. Stacks must be fenced and have prohibitory signs "Entrance to the stack is prohibited, there is a leak under the stack."

1.13. Leaks through which crushed stone and sand enter the conveyor belts should be arranged every 1,5-2 m, equipping them with reliable gates to control the amount of material entering the belt, as well as devices that prevent these materials from hanging.

Before starting the conveyor, the operator must make sure that there are no people on the stacks or on the storage bins.

1.14. The area around the mixing unit of the first and second tiers, as well as the stairs, must be securely fenced with railings at least 1,6 m high with a solid closure 0,15 m high from the level of the site, the floor is solid and even.

1.15. Belt, chain and gear drives, drive, tension drums, tension devices, etc., which can be accessed by the operator, are protected by protective nets, casings made of sheet steel and other strong materials.

1.16. Power and lighting wiring must be protected from mechanical damage. Switches for switching on the power supply are protected by casings and grounded.

1.17. Conveyors along the entire length of the aisle must be equipped with an emergency stop device at any point on the side of the maintenance aisle.

2. Safety requirements before starting work

2.1. When starting work, the asphalt concrete mixer operator must put on overalls and safety shoes, while the hair should be removed under the headgear, and the sleeves should be fastened.

2.2. Before starting the asphalt concrete plant, the driver (operator) must:

carefully inspect the installation and make sure it is in good working order;
check the serviceability of wiring and automation components and mechanisms;
check the presence of appropriate compressed air pressure in the pneumatic drive system;
check the bitumen communications, including the mixer valve and the bitumen pump, in the presence of frozen bitumen, heat the pipes and taps with steam and heat the bitumen to a liquid state; only then can the bitumen pump motor be turned on;
test all components and assemblies of the mixer, carry out a test run of the bitumen pump, which supplies bitumen from the bitumen melting unit to the mixer;
make sure there is a vehicle for loading finished products;
if there is a thermos bunker, check the empty opening and closing of the bunker shutter, the operation of the skip hoist;
check the availability of the intended service personnel;
give a start-up warning sound.

2.3. When working on automated asphalt plants, before each shift, check the serviceability of wiring and automation components, local start-up mechanisms for individual machines and devices, control mechanisms (drives), when remotely controlled, all mechanisms (aggregates and installations) should be started in strict sequence from the point of release of the finished mixture to the point of loading of raw materials.

3. Safety requirements during work

3.1. During operation, the driver must first start the mixer engine, check its idle operation. If no faults are found, the tumble dryer nozzle may be ignited.

3.2. When igniting and adjusting the nozzles, it is necessary to be on the side of the firebox. Do not stand in front of the nozzle. When using a gas burner, you must:

open the valve valve on the purge candle;
check the gas pressure and vacuum in the boiler furnace;
ventilate the firebox for 10-15 minutes;
check the draft in front of the gate;
purge the gas pipeline with gas through a purge candle for 2 minutes;
light the igniter and, inserting it into the furnace, light the burner.

3.3. The supply of a large amount of fuel when the nozzle is ignited is prohibited. In the absence of automatic ignition, it is necessary to light the nozzle with a torch with oil-soaked (fuel oil) rags wound on a piece of thick wire (rod) with a length of at least 1,5 m with an open supply of air or steam. It is necessary to extinguish the torch in a box with sand, installed specifically for this purpose.

3.4. During the operation of the asphalt concrete plant, the mixer driver (operator) must monitor:

heating temperature of the mineral material in the drying drum, which should not exceed 220°C;
steam pressure in the steam blower, which should be in the range of 5-8 kgf / cm2;
fuel heating temperature, which should not exceed 70°C;
bitumen heating temperature (20°C less than the flash point);
during the operation of the nozzle (fuel should burn without black smoke).

3.5. It is forbidden to open the hatches of the agitator during operation of the unit in order to avoid burns.

3.6. It is forbidden to operate drying and mixing drums in case of malfunction (burnout) of furnaces, gas burners or nozzles that operate on liquid fuel, as well as the operation of drying and mixing drums in the mode with the release of the flame of the burners into the atmosphere through the ignition holes and slots in the frontal part of the furnace or annular slots between the jackets of the furnaces and the walls of the rotating drums (labyrinth seal).

3.7. Mineral materials should be fed to a cold elevator only after the drying drum has been warmed up without loading for 2-3 minutes.

3.8. When loading a cold elevator, materials (crushed stone, sand) must be placed in compartments with windows or service bins. It is forbidden to collect material with bulldozers in piles more than 1,5 m high and load the elevator from these piles, standing on top of them and moving the material with a shovel.

3.9. When the screw conveyor or bucket elevator is in operation, do not push the transported material, pull out large pieces or objects that have accidentally fallen into the bucket or chute by hand.

3.10. Pour the bitumen into the weighing tank and release it into the mixer or mixing drum carefully, for which the tap is gradually opened to avoid burns with hot bitumen.

3.11. It is forbidden to accelerate the unloading of batches with the help of tools (crowbar, shovels, etc.) and measure the temperature of the asphalt mix during its unloading.

3.12. Inspect and repair the internal parts of the mixing drum and agitator only after unloading the mixture and cooling the drum and agitator. To speed up cooling, it is allowed to pass several batches of cold sand through it.

3.13. It is forbidden to clean, fasten, tighten and repair individual parts of the machine during the operation of the mixer, as well as to put on and take off the drive belts.

3.14. When working on automated ABZ it is necessary:

the control panel should be placed far from the installations (at a distance of at least 15 m) in order to ensure favorable sanitary conditions;
in the case of using an electro-pneumatic drive, maintain the compressed air pressure at about 7 kgf/cm2 on the control panel (in the dosing department) and 3,5 kgf/cm2 - in the lines; it is forbidden to repair and inspect these units under pressure.

4. Safety requirements after finishing work

4.1. At the end of the work, after stopping the supply of fuel to the nozzle, it is necessary to continue blowing to accelerate the ventilation of the mixer from explosive gases that have accumulated in it.

4.2. When stopping the asphalt concrete plant, the control panel must be closed in such a way as to exclude the possibility of starting the asphalt concrete plant by unauthorized persons.

4.3. After the end of the shift, the asphalt plant operator must show the set of equipment to the shifter who starts work in accordance with the entry in the shift log, in which it is necessary to indicate the noticed defects and measures to eliminate them. The journal should be regularly reviewed by the master of the ABS.

4.4. At the end of the work, the driver must remove overalls and safety shoes, clean them of dust and other dirt and put them in the place designated for storage and change clothes. Then wash your face and hands with warm water and soap or take a shower.

5. Safety requirements in emergency situations

5.1. An emergency situation occurs in such cases:

when detecting a malfunction of technological equipment and mechanisms;
when identifying people in the danger zone.

5.2. If people appear on the stacks or storage bins of inert materials during the operation of the mixer, immediately turn off the conveyor.

5.3. In gas-fired mixers, in case of faulty control devices, damage to gas pipelines and gas outflow, shut off the gas supply.

5.4. In the event of a cessation of fuel supply to the furnace, separation of the flame in the middle, the burner should be immediately turned off.

5.5. In the event of a fire in electrical equipment, immediately turn off the power to the process equipment, take measures to localize the fire.

5.6. When a binder fires in bitumen boilers, oxidizing plants, immediately stop the process equipment, shut off the bitumen supply to the mixer.

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