1． General provisions for arc welding

The motors, electrical appliances, air compressors, etc. on the welding equipment should comply with relevant regulations and have complete protective shells. There should be protective covers at the primary and secondary terminals.

The electric welding machine used on site should be equipped with a shed that can prevent rain, moisture and sun, and should be equipped with fire-fighting supplies.

When welding, welding and cooperating personnel must take safety measures to prevent accidents such as electric shock, falling from high altitude, gas poisoning and fire.

It is strictly prohibited to weld and cut on operating pressure pipelines, containers containing flammable and explosive materials, and stress-bearing components.

When welding non-ferrous metals such as copper, aluminum, zinc, tin, lead, etc., it must be done in a well-ventilated area. Welding personnel should wear gas masks or breathing filters.

When welding in a container, the following measures must be taken: there must be air inlets and outlets on the container and ventilation equipment must be installed; the lighting voltage in the container must not exceed 12V, and someone must be present to supervise during welding. It is strictly prohibited to Welding inside a container that has been sprayed with paint or plastic.

When welding and preheating the weldment, a baffle should be installed to isolate the radiant heat emitted by the weldment.

When welding or cutting at high altitude, safety belts must be hung, fire prevention measures should be taken around and below the welding parts, and special personnel should be supervised.

When the welding wire passes through the road, it must be elevated or penetrated into a protective pipe and buried underground. If it passes through the track, it must pass under the track.

Grounding wires and handle wires must not be placed on flammable, explosive or heat source items. Grounding wires must not be connected to pipes, machine tools, metal structures or tracks of buildings. Grounding resistance Not greater than 4Ω.

Open welding is not allowed on rainy days. When working in wet areas, operators should stand on an area covered with insulating materials and wear insulating shoes.

When using a welding machine that has been out of service for a long time, it must be checked that the insulation resistance must not be less than 0.5MΩ, and the wiring part must not be corroded or damp.

The welding clamp should be firmly connected to the handle wire, and the welding clamp should not be held with your arms. When removing welding slag, the face should avoid the weld being removed.

During load operation, welding personnel should always check the temperature rise of the welding machine. If it exceeds 60°C for grade A or 80°C for grade B, the operation must be stopped and the temperature reduced.

Oxygen bottles, acetylene generators, wood and other flammable materials are not allowed to be stacked within 10m of the welding site.

After the operation, clean the site, extinguish the fire, cut off the power supply, lock the switch box, and eliminate the residual heat of the solder before leaving.

2． AC welding machine

Pay attention to the primary and secondary wires and do not connect them incorrectly. The input voltage must comply with the nameplate regulations of the welding machine. It is strictly forbidden to touch live parts of the primary circuit.

The copper plate connected to the secondary tap must be pressed tightly, and the terminals should have washers. Before closing, carefully check that the wiring nuts, bolts and other parts are not loose or damaged.

When moving the welding machine, the power supply should be cut off. Do not move the welding machine by dragging the cable. If there is a sudden power outage during welding, the power supply should be cut off.

3 Butt welding machine

The butt welding machine should be placed indoors and have reliable grounding (zero connection). If multiple butt welding machines are installed side by side, the distance should not be less than 3m.

Before operation, check that the pressure mechanism of the butt welding machine should be flexible, the clamps should be firm, and there is no leakage in the gas and hydraulic systems. After confirming that they are normal , before welding.

Before welding, the secondary voltage should be adjusted according to the cross-section of the steel bar to be welded, and steel bars exceeding the diameter specified by the butt welding machine must not be welded.

The contact points and electrodes of the circuit breaker should be polished regularly, and all connecting bolts of the secondary circuit should be tightened regularly. The cooling water temperature shall not exceed 40°C; the drainage volume shall be adjusted according to the temperature.

When welding longer steel bars, brackets should be provided. When cooperating with operators carrying steel bars, be careful to prevent spark burns during welding.

The flash area should be equipped with baffles to prevent irrelevant personnel from entering during welding.

During winter construction, the indoor temperature should not be lower than 8°C. After operation, drain the cooling water in the machine.

4. Electroslag pressure welding machine

1. The welding machine must be grounded to ensure the safety of the operator, and the welding wires should be reliably insulated.

2． Welders must wear protective clothing. When welding, the welder should stand on a dry wooden mat or other insulating mat.

3． During the welding process, if the welding machine makes abnormal noise, it should be checked immediately.

4. A voltmeter is installed in the power switch box of the welding machine to facilitate observation of voltage fluctuations. If the power supply voltage drop is greater than 5%, it is not appropriate to weld.

5． BX2-100 type welding transformer should be used. Welding transformers of the same model with smaller capacity can also be used in parallel.

6． A voltmeter, power meter and signal bell should be installed in the control box to facilitate the operator to control the welding parameters and correctly grasp the welding power-on time.

3. Safety operating procedures for electric saws and planers

1. Band saw machine

Before operating, check the saw blade. If the crack length on the tooth side of the saw blade exceeds 10mm, the crack length at the saw blade joint exceeds 10mm, and any saw blade with two consecutive missing teeth and more than three joints shall not be used. . If the crack falls within the above regulations, a crack stopper hole must be punched at the end of the crack.

After adjusting the tension of the saw blade appropriately, run it without load first. If the sound is normal and there is no stringing phenomenon, the saw blade can be operated.

During operation, operators should stand on both sides of the band saw machine. After the sports car starts, no one is allowed to stand around the track within the travel range. It is strictly prohibited to get on or off the sports car during operation.

The size of the logs should be adjusted before sawing, and should not be adjusted after sawing. The cutting speed should be even and should not be too sharp.

Reversing can only be done after the tail end of the wood has passed 0.5m beyond the saw blade. The reversing speed should not be too fast, and attention should be paid to wooden logs and knots that may jam the saw blade.

When working with a platform band saw, feeding and receiving materials must be consistent. Do not put your hands on the table when feeding or receiving materials. When sawing short material, use push rod to feed the material. When returning the wood, keep the saw blade at least 50mm away, and pay attention to the wood logs and knots that may jam the saw blade.

For a band saw equipped with a pneumatic vacuum hood, when sawdust blocks the suction nozzle, it is strictly prohibited to use a wooden stick on the back of the saw wheel to clean the nozzle during operation.

The pressure weight (weight) of the saw machine tensioning device should be adjusted according to the width and thickness of the saw blade or the auxiliary weight should be increased or decreased. Do not use the method of increasing the weight of the weight to overcome the looseness or stringing of the saw blade. phenomena such as strips.

2. Circular saw

A safety baffle and dripping device must be installed above the saw blade. A curved wedge knife must be installed behind the saw blade, 10~15mm away from the teeth. The saw blade should be installed concentrically with the shaft.

The saw blade must have sharp teeth, and no two teeth may be missing in a row. The length of the crack shall not exceed 20mm, and the end of the crack shall be punched to stop the crack hole.

The thickness of the wood to be sawed is limited to 10~20mm that the saw blade can expose the wood. The diameter of the flange holding the saw blade should be 1/4 of the diameter of the saw blade.

After starting, sawing can only be carried out after the rotation speed is normal. When feeding, do not shake the wood from side to side or lift it high. Feed the wood slowly when there are knots in the wood. The length of saw material should be no less than 500mm. When approaching the end, the push rod should be used to feed the material.

If the saw wire goes astray, it should be corrected gradually and should not be pulled violently to avoid damaging the saw blade.

Operators are not allowed to stand on the centrifugal force surface of the saw blade rotation, and their hands are not allowed to cross the saw blade.

When the saw blade temperature is too high, water cooling should be used. Saw blades with a diameter of 600mm or more should be cooled by spraying water during operation.

3． Surface planing (hand planing)

Before operation, check that the safety protection devices must be complete and effective.

When planing, your hands should be pressed on top of the material, and your fingers must be at least 50mm away from the planing mouth. It is strictly forbidden to use your hands to feed the material at the rear end of the wood across the planing opening for planing.

When the thickness of the planed wood is less than 30mm and the length is less than 400mm, it should be pushed with a pressing plate or pressing roller. Wood with a thickness of 15mm and a length of less than 250mm shall not be processed on planers.

If the wood being planed has defects such as cracks or hard knots, it must be treated before planing. Before planing old materials, nails and debris must be removed from the materials. When encountering wooden chags or knots, feed the material slowly. It is strictly forbidden to put your hands on the knots to feed materials.

The thickness and weight of the blade and blade screw must be consistent. The blade holder splint must be flat and tight. The height of the alloy blade weld must not exceed the blade head. The blade fastening screw should be embedded in the blade slot, with the slot end away from the blade. The blade back shall not be less than 10mm. When tightening the blade screws, the force should be uniform and not too loose or too tight.

When the machine is running, you are not allowed to reach into the safety baffle to move the baffle or remove the safety baffle for planing. It is strictly prohibited to operate with gloves.

4. Planers (single-sided and multi-sided)

Planers must use a one-way switch and are not allowed to install a reverse switch. Three- and four-sided planers should be started in sequence.

During operation, it is strictly prohibited to plan two pieces of wood of different materials and specifications at one time, and the thickness of the wood to be planed shall not exceed 50mm. The operator should stand on one side of the machine tool, and must not wear gloves when receiving and feeding materials. The operator must first move toward the big end when feeding materials.

The horizontal gap between the planer blade and the planer table should be between 10 and 30mm. The weight of the planer screws must be equal, and the force should be uniform when tightening. It must not be too tight or too loose. It is strictly prohibited to use a planer with an open slot. .

The amount of feed each time should be 2~5mm. If hardwood or knots are encountered, the amount of feed should be reduced and the feeding speed should be reduced.

The length of the planed material shall not be shorter than the center distance between the front and rear pressing rollers. Thin plates with a thickness less than 10mm must be supported by supporting plates.

The planer must be equipped with a rebound-sensitive backstop device. The feed tooth roller and the supporting smooth roller should be adjusted to the same level and up and down distance. The tooth roller should be 1~2mm lower than the surface of the workpiece. The roller should be 0.3~0.8mm higher than the table top, and the work table should not be skewed or uneven.

The precautions for installing the blade shall be carried out according to the provisions of Article 5 of the planer.

IV. Safety operating procedures for steel bar processing machinery

(1) General provisions

1. Rebar processing machinery that uses electric motors and hydraulic pressure as power and winches as auxiliary machinery shall comply with relevant regulations.

2. The installation of machinery must be solid and stable and maintain a horizontal position. Stationary machinery should have a reliable foundation, and mobile machinery should wedge the running wheels tightly when operating.

3． A machine shed should be set up for outdoor operations, and there should be a place for stacking raw materials and semi-finished products next to the machine.

4. When processing long steel bars, special personnel should be provided to help, and the operators should follow the instructions and should not push or pull them at will.

5． After the operation, the finished products should be stacked. Clean the site, cut off the power supply, and lock the switch box.

(2) Steel bar straightening and cutting machine

1. The material rack and material trough should be installed straight and aligned with the center line of the guide tube, straightening tube and lower cutter hole.

2． Turn the flywheel by hand, check the transmission mechanism and working device, adjust the gap, and tighten the bolts. After confirming that it is normal, start the idling operation. Check that the bearings should have no abnormal noise and the gears are in good mesh. Work can only be done after the operation is normal.

3． According to the diameter of the straightening steel bar, select the appropriate straightening block and transmission speed. Materials can be fed only after passing the debugging.

4. Do not feed materials until the straightening block is fixed and the protective cover is not covered. It is strictly prohibited to open the protective covers and adjust the gaps during operation.

5． After the steel bar is fed in, the hand and the tug wheel must keep a certain distance and must not get close.

6． Before feeding, the non-straight material head should be cut off, and a 1m-long steel pipe should be installed in front of the guide tube. The steel bar must first pass through the steel pipe and then be fed into the guide hole at the front end of the straightening.

7. After the operation, the straightening block of the straightening cylinder should be loosened and returned to its original position, and the preload spring must be returned to its original position.

(3) Steel bar cutting machine

1. The work table for feeding and receiving materials should be kept level with the lower part of the cutter. The length of the work table can be determined according to the length of the material to be processed.

2． Before starting, it must be checked that the cutter has no cracks, the knife holder bolts are tight, and the protective cover is secure. Then turn the pulley by hand, check the gear meshing clearance, and adjust the cutter clearance.

3． After starting, run it dry first and check that all transmission parts and bearings are operating normally before starting work.

4. Do not cut materials when the machine does not reach normal speed. When cutting, you must use the middle and lower part of the cutter, hold the steel bar tightly and align it with the cutting edge to quickly feed it.

5． Do not cut steel bars whose diameter and strength exceed those specified on the machine nameplate and red-hot steel bars. When cutting multiple steel bars at one time, the total cross-sectional area should be within the specified range.

6． When cutting low-alloy steel, the cutter should be replaced with a high-hardness cutter, and the diameter should comply with the nameplate regulations.

7. When cutting short materials, the distance between the hand and the cutter should be kept above 150mm. If the hand grip is less than 400mm, use a casing or clamp to press or clamp the short end of the steel bar.

8． During operation, it is strictly forbidden to use hands to directly remove broken ends and debris near the cutter. Non-operators are not allowed to stay around the swing of steel bars and near the cutter.

9. If you find that the machine is not operating normally, making abnormal noises or the cutter is skewed, you should immediately stop the machine for maintenance.

10. After operation, use a steel brush to remove debris between the cutters and clean and maintain the entire machine.

(4) Steel bar bending machine

1. The workbench and bending machine table should be kept level, and various mandrels and tools should be prepared.

2． Install the mandrel, forming shaft, iron stop shaft or variable stop frame according to the diameter and bending radius of the processed steel bar. The diameter of the mandrel should be 2.5 times the diameter of the steel bar.

3． Check that the mandrel, block, and turntable are free of damage and cracks, and that the protective cover is fastened reliably. Operation can only begin after the dry operation is confirmed to be normal.

4. During operation, insert one end of the steel bar that needs to be bent into the gap of the turntable fixed pin, and the other end is close to the fuselage fixed pin, and press it with your hand. Check that the fuselage fixed pin is indeed installed on the side blocking the steel bar before starting the machine. .

5． During operation, it is strictly prohibited to replace the spindle, pins, change angles, adjust speed, etc. It is also not allowed to refuel or clean.

6． When bending steel bars, it is strictly prohibited to exceed the diameter, number of steel bars and mechanical speed specified by this machine.

7. When bending high-strength or low-alloy steel bars, the maximum diameter should be converted and the corresponding mandrel should be replaced according to the requirements on the machine nameplate.

8． It is strictly prohibited to stand within the working radius of the bent steel bars and on the side of the fuselage without fixed pins. The bent semi-finished products should be stacked neatly, and the hooks should not be facing upward.

9. When the turntable changes direction, it must be done after it has stopped.

(5) Steel bar cold drawing machine

1. According to the diameter of the cold-drawn steel bar, the hoist should be selected reasonably. The hoisting wire rope should pass through the closed guide pulley and be at right angles to the direction of the pulled steel bar. The position of the winch must enable the operator to see the entire cold drawing site and be no less than 5m away from the cold drawing center line.

2． Warning zones are set up outside the ground anchors at both ends of the cold-drawn site, and protective railings and warning signs are installed. Unrelated persons are strictly prohibited from staying here. Operators must stay at least 2m away from the steel bars when working.

3． Equipment controlled by counterweights must match the pulleys and have signs indicating the rise and fall. If there are no signs, there should be a dedicated person to direct it. When the counterweight frame is lifted, the height should be limited to within 300mm from the ground, and there should be railings and warning signs around the counterweight frame.

4. Before operation, the cold-drawn clamp should be inspected. The clamp teeth must be intact, the pulleys and tractors are lubricated and flexible, and the hooks, ground anchors and protective devices should be complete and firm. Operation can only be carried out after confirming that they are in good condition.

5． The winch operator must see the commander giving the signal and wait until all personnel leave the danger zone before operating. Cold drawing should be carried out slowly and evenly. Pay attention to the parking signal at any time or when you see someone entering the danger zone, you should stop pulling immediately and slightly relax the hoisting wire rope.

6． Devices that use elongation control must be equipped with obvious limit signs and must have a dedicated commander.

7. Lighting facilities for night work should be installed outside the tension danger zone. If they must be installed above the site, their height should exceed 5m. The light bulbs should be covered with protective covers, and the wires should not be bare wires.

8． After the operation, the hoisting wire rope should be loosened, the counterweight should be dropped, the power supply should be cut off, and the switch box should be locked.

5. Safety operating procedures for concrete vibrators

1. Before use, check that all parts are firmly connected and the rotation direction is correct.

2． The vibrator shall not be placed on initially set concrete, floors, scaffolding, roads and dry hard ground for vibration testing. If maintenance or operations are interrupted, the power supply should be cut off.

3． The bending radius of the flexible shaft of the plug-in vibrator shall not be less than 50cm, and shall not exceed two bends. During operation, the vibrator shall naturally sink vertically into the concrete. It shall not be forced to be inserted, pushed obliquely, or the rod head shall be clamped by the steel bar. It must not be fully inserted into the concrete.

4. The vibrator should be kept clean, and no concrete should be adhered to the motor housing to hinder heat dissipation.

5． When the work is transferred, the motor wires should be kept of sufficient length and looseness. Never use the power cord to pull the vibrator.

6． When using a rope to pull the flat vibrator, the rope should be dry and insulated, and the motor should not be kicked with your feet when moving or turning.

7. The vibrator and the flat plate should be kept tight, the power cord must be fixed on the flat plate, and the electrical switch should be installed on the handle.

8． When several attached vibrators are used simultaneously on a component, the frequency of all vibrators must be the same.

9. Operators must wear insulating rubber shoes and insulating gloves.

10. After operation, cleaning and maintenance must be done. The vibrator should be placed in a dry place.

6. Mixer safety operating procedures

1. The working site must have good drainage conditions, there should be a water source near the machinery, and the machine shed should have good ventilation, lighting, and rainproof and antifreeze conditions, and no water should accumulate.

2． Fixed machinery must have a reliable foundation, and mobile machinery should be firmly mounted on a flat, hard floor with square timbers or brackets and kept level.

3． When the temperature drops below 5°C, anti-freeze and heat preservation measures should be taken in pipelines, pumps and machines.

4. After the operation, the materials and accumulated water in the machine, water tank and pipes should be drained out in time, the machinery should be cleaned and maintained, the work site should be cleaned up, the power supply should be cut off, and the switch box should be locked.

5． For machinery equipped with tires, the towing speed shall not exceed 15km/h during transfer.

6． The console of a fixed mixer should enable the operator to see the working conditions of various parts, and the instruments and indication signals should be accurate and reliable. The console of an electric mixer should be padded with rubber sheets or dry wooden boards.

8． Transmission mechanisms, working devices, brakes, etc. should be fastened and reliable to ensure normal operation.

9. Aggregate specifications should be consistent with the performance of the mixer, and those beyond the permitted range must not be used.

10. Run the machine empty, check the rotation direction of the mixing drum or mixing blade, and confirm that the operation and braking of each working device are normal before operating.

11. When feeding, it is strictly prohibited to put your head or hands between the hopper and the frame to check or explore the feeding situation. During operation, you are not allowed to put your hands or tools into the mixing drum to scoop out the materials.

12. It is strictly prohibited to work or walk under the hopper when it is raised. There should be a pillow for the hopper at the bottom of the pit, and the hopper must be fastened with a chain when cleaning the pit.

13． Adding materials to the mixing drum is carried out during operation; adding new materials must first unload all the original concrete in the mixer before proceeding. The mixer must not be stopped midway or started at full load, except for reverse discharging.

14. During operation, if a malfunction occurs and the machine cannot continue to operate, the power supply should be cut off immediately, the concrete in the mixing drum should be cleared, and then maintenance should be carried out.

15. After the operation, the mixer should be thoroughly cleaned. If the operator needs to enter the barrel for cleaning, he must cut off the power supply, have someone specially assigned to monitor the mixer outside, or remove the fuse and lock the switch box before entering.

7. Safety operating procedures for winches

1. During installation, the base must be stable and firm, reliable ground anchors must be set and a work shed should be set up. The operator should be positioned so that he can clearly see the objects being dragged or lifted by the commander.

2． Before operation, the fixation condition of the winch to the ground, protective facilities, electrical circuits, braking devices and wire ropes should be checked before use.

3． Parts driven by belts and open gears must be equipped with protective covers, and open pulleys must not be used for guide pulleys.

4. For a hoist that uses power to rotate forward and reverse, the rotation direction of the drum should be consistent with the direction indicated on the control switch.

5． The distance from the center line of the drum to the first guide pulley should be greater than 15 times the width of the drum for grooved drums and 20 times for non-grooved drums. When the wire rope is in the middle of the drum, the position of the pulley should be perpendicular to the axis of the drum.

6． There must be no obstacles within the travel range of the winch brake lever.

7. The wire ropes on the drum should be arranged neatly. If overlapping or diagonal winding is found, the machine should be stopped and rearranged. It is strictly prohibited to pull or step on the wire rope with hands or feet during rotation.

8． During operation, no one is allowed to cross the working hoisting wire rope.

After the object is lifted, the operator is not allowed to leave the winch. Objects or cages should be lowered to the ground during rest periods.

9. During operation, if there is a power outage, the power supply should be cut off and the lifting object should be lowered to the ground.

8. Tower Crane (Fixed) Safety Operating Procedures

1. Party B shall assign fixed personnel with Beijing Special Operations Operation Certificate (Tower Crane Driver) to operate the tower crane safely, ensuring 24-hour service and being on call.

2. The tower crane repair time is 2 days per month. If the time is exceeded, the work will be deducted in proportion.

3. Party B ensures Party A’s operating shifts and staffing, and at the same time strengthens mechanical maintenance to maintain good working condition and ensure Party A’s full use.

4. The tower operator of Party B enters the site to receive safety education. Both parties *** will conduct a safety technical briefing on the tower operator and the corresponding signal workers. The tower operator is familiar with the mechanical performance and operating principles of the tower crane. Carry out safe operations in accordance with the tower crane safety management system and relevant standards.

5. Party B’s tower company abides by Party A’s on-site safety management rules and regulations and safe operating procedures to ensure safe production. If any unsafe potential is discovered, it has the right to order a shutdown, and promptly informs Party A to take measures together. Restore operation as soon as possible to meet Party A's use.

6. Obey instructions, actively and proactively cooperate with Party A’s work arrangements. Cooperate well with the signal workers.

7. Machinery failures must be eliminated to ensure production and use.

8. The installation, lifting, and disassembly of the crane must be carried out in accordance with the original factory regulations, and safe operation measures must be formulated. It shall be carried out by a professional team (group) under the unified guidance of the team (group) leader, and must Technical and security personnel are on hand to monitor.

9. After the crane is installed, the vertical deviation between the tower and the ground shall not exceed 3/1000 under no load conditions.

10. The temporary power distribution box dedicated to the crane should be installed near the tower crane, and the power switch should meet the specified requirements. The cable drum must be flexible, safe and reliable, and must not drag the cable.

11. The crane must be equipped with safety devices such as luffing and hook height limiters and torque limiters, and must be sensitive and reliable.

12. Placards are not allowed to be hung on the crane tower.

13． Key inspections before operation:

The appearance of the mechanical structure and each transmission mechanism should be normal;

The positions of each gear box and hydraulic oil tank should meet the standards;

Mainly The connecting bolts of the parts should not be loose;

The wear of the wire rope and the threading pulley should comply with the regulations;

The power supply cable should not be damaged.

14. When a crane is working near the broadcast transmitting antenna of a medium-wave radio plant, all workers who come into contact with the crane should wear insulating gloves and insulating shoes.

15. Check that the power supply voltage should reach 380V, and its variation range should not exceed ±20V. The start control switch should be in the zero position before powering on. Turn on the power and check that there is no leakage in the metal structure before getting on the machine.

16. During no-load operation, check the brakes, safety limits, and protective devices of the rotation, hoisting, and luffing mechanisms before operating.

17． When operating each controller, the controls should be operated step by step, and over-shift operations are strictly prohibited. When changing the running direction, the controller should be turned to the zero position, and then turned to the other direction after the motor stops rotating. Strive to operate smoothly, and sudden opening and stopping are strictly prohibited.

18. When the hook is lifted close to the top of the boom, when the trolley reaches the end point or the crane approaches the end of the track, it should slow down to the stop position. The distance between the hook and the top of the boom shall not be less than 1m.

19. After lifting a heavy object, it is strictly prohibited to drop it freely. When the heavy object is in place, the micro-motion mechanism or the brake can be used to lower it slowly.

20. When the lifted heavy object is translated, it should be more than 0.5m higher than the obstacle it crosses.

21. For cranes equipped with mechanical torque limiters, after each amplitude change, the tonnage indicator plate of the overload limiter must be adjusted according to the radius of rotation and the allowable load at that radius.

22． Turn each control switch to the zero position, turn off each switch in turn, close the doors and windows of the operating room, and turn off the main power switch after getting off the machine. Turn on the altitude indicator light.

23. Lock the rail clamp to fix the crane to the track. If there is a strong wind of level 8, pull the wind rope to fix it to the ground anchor or the building.

24. Any personnel must wear safety belts when inspecting or repairing high-altitude parts of tower caps, booms, and balance arms.

Nine. Safety operating procedures for breaststroke tamping machines

1. The frog-type tamping machine is suitable for foundations, floors and site leveling of solid gray soil and plain soil. It is not allowed to tamp hard or hard or soft ground, and it is not allowed to tamp hard rocks or miscellaneous soil mixed with masonry fragments.

2． When two or more frog tampers are operating on the same working surface, the left and right spacing shall not be less than 5m, and the front and rear spacing shall not be less than 10m.

3． Personnel operating and transmitting wires must wear insulating gloves and insulating rubber shoes.

4. Check that the circuit meets the requirements and is well grounded (zero connection). Work can only be done after all transmission components are in normal condition.

5． The inner wall of the tube of the electric door switch on the handle and the entrance where the motor wiring penetrates the handle should be covered with insulating tubes or other insulating materials.

6. During operation, the cable should not be stretched too tight, and a margin of 3 to 4 meters should be ensured. The line delivery personnel should adjust at any time according to the compacted route, and the cable should not be twisted or entangled. When the cable needs to be moved during operation, the machine should be stopped.

7. When operating, do not push, pull or press the handle with force, and do not use excessive force when turning. Sharp turns are strictly prohibited.

8. When compacting and filling high earthwork, start compacting 2 to 3 times within 10 to 15cm of the edge, and then compact the edge.

9． When working indoors, prevent the tamping plate or eccentric block from hitting the wall.

10． After the operation, cut off the power supply and roll up the cable. If there is any damage, repair or replace it in time.

10. Acetylene gas welding safety operating procedures

1. Acetylene generators, oxygen bottles, hoses, valves, and meters must not be contaminated with oil. Hose joints must not be made of copper.

2. The distance between the acetylene generator, oxygen cylinder and welding torch shall not be less than 5m, otherwise isolation measures shall be taken. When there are two or more acetylene generators at the same location, the distance between them shall not be less than 10m.

3． The acetylene generator should be placed upwind of the operating location and should not be placed under high-voltage wires and any wires. Do not expose it to strong sunlight. Fences should be set up around the area and "No Fireworks" signs should be hung.

4. New rubber hoses must be pressure tested. Hose that have not been pressure tested or are substitutes and hoses that are deteriorated, aged, brittle, leaky, or stained with soil and grease shall not be used.

5． Do not place rubber hoses on high-temperature pipes and wires, or place heavy objects or hot objects on the hoses, and do not lay the hoses together with wires for welding. The hose should be sheathed or covered when passing through the roadway.

6. Oxygen bottles should be stored separately from other flammable gas bottles, grease and other flammable and explosive items, and should not be transported in the same vehicle. Oxygen bottles should have anti-shock rings and safety helmets. It should be placed flat, not turned upside down, and should not be exposed to strong sunlight. It is strictly forbidden to use a crane or crane to lift oxygen bottles.

7. When opening the valve of the oxygen cylinder, use special tools, move slowly, and do not face the pressure reducer. However, you should observe whether the pointer of the pressure gauge is sensitive and normal. The oxygen in the oxygen cylinder must not be completely used up, and a residual pressure of at least 49kPa (0.5kgf/cm2) should be left.

8. It is strictly prohibited to use oxygen bottles without a pressure reducer.

9． When installing the pressure reducer, you should first check that there is no grease in the oxygen cylinder valve joint. When opening the oxygen cylinder valve slightly, you must first loosen the valve screw of the pressure reducer (do not close it tightly).

10． When igniting the welding (cutting) torch, you should first open the acetylene valve to ignite, and then open the oxygen valve to adjust the flame. When closing, the acetylene valve should be closed first, and then the oxygen valve.

11. During operation, if the valve of the oxygen cylinder is found to be malfunctioning or damaged and cannot be closed, the oxygen in the cylinder should be allowed to escape automatically before disassembly and repair.

12． When it is found that the acetylene generator is on fire due to air leakage, the acetylene generator should be pushed down in a safe direction immediately, and the fire should be extinguished with yellow sand without clogging.

13． Acetylene hoses and oxygen hoses must not be installed incorrectly. When the oxygen hose catches fire during use, do not bend the hose to cut off the air, and quickly close the oxygen valve to stop the oxygen supply. When the acetylene hose catches fire, the torch should be turned off first, and the fire can be extinguished by bending the front section of the hose.

14. During open-air construction in winter, if hoses and flashback arresters freeze, they can be thawed with hot water, steam or under heating equipment. It is strictly forbidden to bake with flame.

15. Do not carry the rubber hose on your back. If the welding gun contains acetylene or oxygen, it must not be placed in metal pipes, tanks, cylinders, or boxes.

16． After the operation, the pressure reducer should be removed and the gas cylinder safety cap should be screwed on.

11. Safety operating procedures for mixing stations

1. Mixer operators must hold certificates to work, and operators in the operating room can skillfully use the operating system; non-operators are prohibited from entering the mixing station without permission.

2. Staff members are strictly prohibited from working while drunk, working while tired, or working while sick.

3． Before each use, a professional electrician should check whether each circuit is intact to ensure that the circuit is normal; check whether the transmission mechanism, working device, brake, and wire rope of the mixer are intact; if there is any damage, repair it in time before use; check the main switch button, The reliability of the indicator light, the upper and lower limits of the lifting hopper, etc., if there is any fault, can only be started after the repair is completed by professionals.

4. During the operation of each system of the mixing station: it is strictly forbidden to suddenly change the working mode (manual or automatic); in the event of a power outage, the main power supply and sub-power supply must be cut off first, and then other work is carried out; it is strictly forbidden to touch the operating parts with the body or equipment; if the system fails If there is a fault, the main power supply and sub-power supply must be cut off, and then maintenance must be carried out and designated personnel should be assigned to supervise it.

5． The operator in the operating room and the mixer operator must cooperate closely. The mixer must not be started at will without receiving accurate signals from the mixer operator.

6. Before starting up, mixer operators are not allowed to touch the operating parts of the operating system with their bodies or instruments.

7. It is strictly prohibited to work or walk under the mixer hopper when it is raised. There should be a pillow for the hopper at the bottom of the pit, and the hopper must be fastened with a chain when cleaning the pit.

8． After the operation is completed, the materials and accumulated water in the mixer and pipes should be drained out in time, the machinery should be cleaned and maintained, the work site should be cleaned up, the power supply should be cut off, and the gate box should be locked.

12. Safety operating procedures for concrete pumping equipment

1. Concrete pump operators must undergo special training and be able to operate concrete pumps skillfully.

2． Operators and professional electricians must frequently check the integrity of the concrete pump to ensure that the concrete pump is in a safe and normal state when operating.

3． Safety devices must not be modified without authorization and must be used in the correct manner.

4. The concrete pumping equipment should be placed at a certain distance from the foundation pit, and the action range of the distribution boom must be free of obstacles and high-voltage wires.

5． Horizontal pipeline laying lines should be close to straight lines with few bends. Pipes and pipe supports must be reliable, and pipe joints must be sealed reliably. Y-shaped pipes should be installed with tapered pipes.

6． It is strictly forbidden to directly connect vertical pipes to the delivery port of the pump. Horizontal pipes of not less than 10 meters should be installed in the front section of the vertical pipe rack. A check valve should be installed near the horizontal pipe near the pump.

7. When the wind force is greater than six poles, the trampoline must not use cloth poles. When the weather is hot, wet sacks or wet straw bags should be used to cover the pipes.

8． The legs of the distribution boom should be fully extended and supported. The distribution boom should not be started before being supported. The distribution boom can only be rotated after it is lifted off the bracket. The extension of the distribution boom should be carried out in order. It is strictly forbidden to use the distribution boom to lift or drag objects. It is strictly prohibited to move the body when the boom is in a fully telescopic state. When moving during operation, the upper section of the distribution boom should be folded and fixed, and the moving speed should not exceed 10KM/H. The distribution boom should not use pipes exceeding the specified diameter, and the attached hose should be tied with a safety rope to prevent it from falling off.

9. When the pumping system is under pressure, no delivery pipelines and hydraulic pipelines should be opened. The safety valve of the hydraulic system must not be adjusted arbitrarily, and the accumulator can only be filled with nitrogen.

10. After the operation, all the concrete in the hopper and pipes should be discharged, and then the pump, hopper and pipes should be flushed. When flushing pipes with compressed air. No one is allowed to stand 10 meters in front of the outlet end of the pipeline, and metal mesh or other materials should be used to collect the foam rubber and sand and gravel that are flushed out.

11. It is strictly forbidden to use compressed air to flush the boom piping. The folding and shrinking of the cloth boom should be carried out in order.

12. Move the pistons on both sides to the cleaning chamber and apply lubricating oil.

13． All operating switches, adjustment handles, handwheels, control rods, cocks, etc. should be reset. Unload the hydraulic system.