What are the contents of workshop electrical safety inspection and what should be paid attention to?

What are the contents of workshop electrical safety inspection and what should be paid attention to?

Things that enterprises should pay attention to when inspecting, maintaining and inspecting electrical equipment: 1. The length of the process of electrical equipment from new to old, from the beginning of use to the end of its life, is not only related to product design, manufacturing quality, installation construction and usage methods, but also related to whether it is regularly inspected and carefully maintained. In a sense, inspection and maintenance play a decisive role in extending the service life of equipment. Because a piece of good equipment, even if it is manufactured and installed with high quality, if it is not checked and tested frequently after it is put into operation, defects in the operation cannot be discovered in time. If the equipment runs with "disease", it will soon be damaged, causing Fire and personal electric shock accidents also shorten the service life of the equipment. If the equipment is regularly maintained carefully and hidden dangers are eliminated immediately, the safe and reliable operation of the electrical equipment can be ensured, thereby extending its service life. Therefore, during the operation of electrical equipment, it must be inspected, tested and maintained frequently. 2. It is best to conduct electrical safety inspections of enterprises once a quarter, with special attention to safety inspections before and during the rainy season. Solve problems promptly without leaving any hidden dangers. During the inspection, attention should be paid to the following aspects: (1) Whether the rules and regulations regarding safe use of electricity are complete. (2) Whether the personnel responsible for electrical work in the workshop, work section, and team are implemented. (3) The inspection content of electrical equipment includes: whether the insulation is damaged; whether the insulation resistance is qualified; *** whether there are protective devices on the live parts; whether the protective grounding or protective zero connection is correct and reliable; whether the protective devices meet the requirements; whether the portable lamp and local Whether the voltage of lighting lamps is a safe voltage and whether other safety measures have been taken; whether safety appliances and fire-extinguishing equipment (fire-extinguishing equipment for electrical fires) are complete; whether the installation of electrical equipment is qualified and whether the installation location is reasonable; whether indoor and outdoor circuits comply with safety requirements Require. (4) Maintain inspections of important electrical equipment such as transformers and make necessary records. (5) The acceptance of newly installed equipment, especially self-made equipment, must adhere to principles and be meticulous. (6) Whether the distance between lifting and transportation tools and electrical lines and electrical equipment meets the regulations. (7) The insulation resistance of electrical equipment in use should be tested regularly; the grounding resistance of various grounding devices should be measured regularly; transformer oil, safety appliances, lightning arresters and other protective electrical appliances should also be regularly inspected, measured or tested Withstand voltage test. Issues that should be paid attention to in the safety of electrical maintenance in the workshop

Operation of low-voltage equipment

1. When operating, you should be careful and check the electricity before repairing to determine the charged parts;

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2 Do not touch live parts directly with your hands;

3 After the maintenance is completed, return the door and panel to their original positions;

34 During on-site maintenance, the equipment switch should be Tag out and lock out and set up warning signs.

5. Equipment that requires power outage for maintenance must be tagged out and locked in accordance with the principle of power outage. If the power cannot be cut off, one person must supervise and work alone. One person must not work alone.

Maintenance of the second motor

1. Check whether there are abnormal noises when the motor is running and check the bearings;

2. The insulation resistance of the rocking side motor is generally not less than 0.5 megohm;

3 Check whether the motor fan is damaged;

4 Check whether the motor terminal is damaged;

5 Check whether the no-load current of the motor is too high. The no-load current generally does not exceed 30% to 40% of the rated current.

6 Lubrication of the motor

3. The motor is lubricated according to the lubrication cycle.

1. For motors with small capacity and no oil filling holes, check them at least once every 4000 hours of operation (about half a year). If the grease is found to have deteriorated, it can be replaced early.

2. For motors with larger capacity, higher speed, and oil filling and draining devices, they generally need to be filled with oil once every 750 to 1500 hours (about 1 to 2 months). When refueling, add grease frequently and sparingly, clean the oil filling hole, and inject it through the oil cup with a grease gun.

3. When refueling the motor, the injection amount is about 1/2 (2-pole motor) and 2/3 (4-pole or above motor) of the net volume of the bearing. The grease is 2# lithium grease or other high temperature grease. (For TA or WTA type and high ambient temperature motors)

Maintenance and repair of other power distribution cabinets

Generally, the principle of power outage first and inspection later is followed. If the power outage is indeed impossible, two People are doing it at the same time, one person is operating and the other is supervising.

4.1 Instrument inspection

a. PLC and sensors are precision instruments, and insulation testing experiments are strictly prohibited to avoid damage to the equipment.

b. Check whether the instrument indication is normal, whether the on-site instrument indication is consistent with the control reality, and whether the regulator output is consistent with the on-site valve position;

c. Check the instrument power supply (AC220V or DC24V), whether the air source pressure is normal;

d. Check the insulation and heating conditions of the instrument; (such as: oval gear flowmeter, electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, mass flowmeter, Flange differential pressure transmitter, float level gauge and regulating valve, etc.)

e. Check the insulation of the instrument pipeline; (such as: differential pressure transmitter and pressure transmitter guide pipe )

f. Check the leakage of the instrument and process connection port;

g. Check the integrity of the instrument.

h. Corrosion of the instrument body and connecting parts;

4.2 Instrument maintenance

Regular discharge of sewage

a. Before discharge, it is necessary to Contact the technical personnel and obtain approval from the technical personnel before proceeding;

b. Before draining the flow or pressure regulating system, the automatic switch should be switched to manual to ensure that the opening of the regulating valve remains unchanged

< p> c. For differential pressure transmitters, close the positive and negative pressure valves of the three-valve group before draining

d. Place a container under the drain valve and slowly open the drain valves of the positive and negative pressure guide pipes. , allowing materials and dirt to enter the container and preventing materials from being discharged directly into the ditch. Otherwise, it will pollute the environment and cause waste;

e. Due to the poor quality of the valve, the sewage valve will appear after being opened and closed several times. For problems that cannot be closed, the emergency measure is to add a blind plate to ensure that the drain valve does not leak, so as not to affect the measurement accuracy;

f. Open the positive and negative pressure valves of the three-valve group and loosen the differential pressure transmitter Turn the sewage (exhaust) screw on the device body to drain the sewage, and tighten the screw after the sewage discharge is completed;

g. Observe the on-site indicator instrument until the output is normal.

4.3 Disassembly and installation of instruments

a. Disassemble the on-site instrument according to the needs of the process;

b. When disassembling the flange differential pressure transmitter, Be sure to confirm that the material is empty before proceeding, and pay attention to protecting the transmitter diaphragm. If there is difficulty in emptying the material, you must ensure that the liquid level is below the flange opening of the instrument. After the instrument is disassembled, install the blind plate in time;

c. Disassemble the thermocouple, thermal resistor, and electric transmitter. After waiting for the instrument, wrap the power cable and signal cable joints with insulating tape and adhesive tape respectively, and place them properly. Note that the power must be turned off before disassembling the transmitter;

d. For pneumatic instruments and electrical valve positioners Wait, turn off the air source, and loosen the filter pressure reducing valve joint;

e. The serial number of the disassembled instrument should be placed in an obvious place, and the number should be correctly placed during installation to prevent installation confusion of similar instruments due to different measuring ranges. , causing instrument failure;

f. For instruments with interlocks, switch to manual and then disassemble;

g. When installing instruments, be sure to pay attention to the instrument number and install it correctly; Otherwise, the instrument will be installed incorrectly, and it will be difficult to find a fault;

h. When installing the instrument, drain the air source first, and then supply air after the air source is drained to prevent blockage and other phenomena caused by unclean air source. The instrument is faulty;

i. When installing the regulating valve, pay attention to the fact that the arrow on the valve body is consistent with the flow direction. If the material is dirty, the front and rear stop valves can be opened and flushed before installation (pay attention to material recycling or environmental pollution). The front and rear stop valves should be fully opened and then returned half a turn;

j. Use a single flange. When a differential pressure transmitter measures the liquid level of a closed container, negative migration is usually added. This measurement method is to fill the negative pressure connecting pipe with liquid. Therefore, after reinstallation, attention should be paid to adding liquid in the negative pressure connecting channel. The liquid filling height and The product of liquid densities equals the negative migration of the flange transmitter. The liquid added is generally the same as the measured medium, that is, the material in the container;

k. For differential pressure transmitters and pressure transmitters protected by isolation liquid, when restarting the vehicle, pay attention to checking the pressure guide pipe, the isolation liquid cannot leak;

l. When using a differential pressure transmitter to measure steam flow, you should first close the positive and negative pressure valves of the three-valve group, open the balance valve, and check the zero position. Wait until all the steam in the pressure pipe condenses into water before turning on the meter. To prevent the oscillation phenomenon when opening the meter when the steam is not condensed, which sometimes damages the meter, there is also an installation method, that is, there is an isolation tank behind the pressure valve in the annular chamber. Before opening the meter, cold water is filled into the pressure guide pipe through the isolation tank, so that when measuring When the steam flow is high, the meter can be turned on immediately without causing oscillation;

m. When wiring the thermocouple compensation wire, pay attention to the positive and negative polarity, and do not connect it reversely. Be careful not to confuse the three-pole thermal resistor A.B.C;

n. Check that the regulator output, DCS output, handheld operator output and control valve position indication are consistent (or consistent with the input of the electric valve positioner). What does a workshop safety inspection generally check?

Personally, I think it mainly checks the unsafe behavior of people and the unsafe state of equipment. Chat with front-line employees, and they actually know the most. It can improve the awareness of safety managers. The contents of the supervision safety inspection before the Spring Festival include edge protection, finished product protection, electricity safety, duty personnel scheduling, and the setting of safety warning signs, etc. . . .

What are the main forms of safety inspections?

The main types of safety production inspection supervision are:

(1) Comprehensive safety inspections

(2) Regular safety inspections Inspections

(3) Professional safety inspections by professional or full-time safety managers

(4) Seasonal safety inspections

(6) Key safety inspections of key departments

According to the Production Safety Law and relevant laws and regulations, the basic contents of safety production supervision and inspection include the following aspects:

(1) Checking ideas

Checking the leadership and behavior of enterprises The extent to which employees understand the safety production policy, the degree to which they attach importance to establishing and improving safety production management and safety production rules and regulations, and their attitude towards handling safety problems or safety hazards discovered during safety inspections, etc.

(2) Inspection system

In order to implement the safety production management system, engineering contracting enterprises should establish and improve a complete set of safety production rules and regulations of the enterprise based on their own actual conditions, and implement them to specific engineering project construction tasks. During the safety inspection, the company's construction safety production rules and regulations should be checked. Construction safety production rules and regulations should generally include the following contents:

(1) Safety production responsibility system;

(2) Safety production license system;

( 3) Production safety education and training system;

(4) Safety measure planning system;

(5) System for special operators to hold certificates to work;

(6 ) Expert demonstration system for special construction plans;

(7) Elimination system for processes, equipment, and materials that endanger construction safety;

(8) Registration system for use of construction hoisting machinery,;

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(9) Production safety accident reporting and investigation and handling system;

(10) Various safety technical operating procedures;

(11) Hazardous operation management approval system;

(12) Safety management system for the production, storage, transportation and use of flammable, explosive, highly toxic, radioactive, corrosive and other dangerous goods;

(13) Protection of protective items Distribution and use system;

(14) Safe electricity use system;

(15) Approval system for fire operations in dangerous places;

(16) Fire prevention, Explosion-proof, lightning-proof and anti-static systems;

(17) Dangerous position patrol inspection system;

(18) Safety sign management system.

(3) Inspection and management

Mainly check whether the safety production management is effective and whether the safety production management and rules and regulations are truly implemented.

(4) Check for hidden dangers

Mainly check whether the production site meets the safety production requirements. Inspectors should go deep into the work site to check the workers’ working conditions, sanitation facilities, and safe passages. Zero Storage of components, status of protective facilities, storage of electrical equipment, pressure vessels, and chemicals, compliance with standards for dust and toxic and hazardous work sites, ventilation and lighting facilities in the workshop, and whether the use of personal protective equipment complies with regulations, etc. Special attention should be paid to strengthening inspections of some key parts and equipment, such as boiler rooms, substations, various highly toxic, flammable, explosive and other places.

(5) Inspection and rectification: The main inspection is to check whether safety technical measures and safety management measures have been adopted for safety issues raised in the past and after the occurrence of safety production accidents and safety hazards, and how effective the rectification is.

(6) Check and handle accidents: Check whether casualty accidents are reported in a timely manner and whether the responsible persons have been dealt with seriously. During the safety inspection, an inspection team must be established to meet the needs of the safety inspection and equipped with appropriate manpower and material resources. After the inspection, a safety inspection report should be prepared, describing the items that have met the standards, the items that have not met the standards, existing problems, analysis of the causes, and suggestions for corrective and preventive measures.

What is the content of the safety inspection before taking up the position?

What is the content of the safety inspection before taking up the position?

Electrical safety inspection includes checking the insulation of electrical equipment. No damage, whether the insulation resistance is qualified, whether the live parts of the equipment are protected, whether the screen protection device meets the safety requirements, whether the safety distance is sufficient, whether the protective zero connection or protective grounding is correct and reliable, whether the protective device meets the requirements, the portable lamp and whether the local lighting voltage is a safe voltage or whether other safety measures have been taken, whether the safety appliances and electrical fire-extinguishing equipment are complete, whether the installation of electrical equipment is qualified, whether the installation location is reasonable, whether the electrical connection parts are intact, whether the electrical equipment or electrical lines are overheated , whether the system is sound, etc. Source of this article: Exam Network

We must insist on inspections of important electrical equipment such as transformers, and make necessary records for newly installed equipment. In particular, the acceptance work of self-made equipment must adhere to principles and be meticulous. For electrical equipment in use, the insulation resistance should be measured regularly; for various grounding devices, the grounding resistance should be measured regularly; for safety appliances, lightning arresters, transformer oil and other protective electrical appliances, the insulation resistance should also be regularly checked, measured or tested. Pressure test.

What issues should be paid attention to during the safety inspection of scaffolding ramps?

1. During operation, you should pay attention to cleaning up the materials falling on the scaffolding surface at all times, keeping the scaffolding surface neat and clean, and do not pile materials and tools randomly to avoid affecting safe operations. Or things may fall and injure people.

2. When prying, pulling, pushing, etc., be careful to adopt the correct posture, fasten your seat belt, and be careful to prevent your body from becoming unstable and causing you to fall, fall, or throw things out. When removing the formwork from the scaffolding, necessary support measures should be taken to prevent the removed materials from falling out of the scaffolding.

3. When the scaffolding surface is not high enough and needs to be raised, a stable and reliable method must be adopted, and the height must not exceed 50cm, and the safety protection facilities must be increased at the same time; if it exceeds 50cm, it must be redesigned according to the procedure. Approval.

4. When transporting materials on the scaffolding surface past workers who are working, a signal must be sent out in time to draw the attention of others. Materials must be placed gently and steadily, and dumping, violent knocking, or other hasty unloading methods are not allowed.

5. It is forbidden to play, sleep or sit on the crossbar to rest on the scaffolding. It is not allowed to rush, run or jump. When avoiding each other, you must maintain body balance. The main contents of the construction safety inspection in the rainy season are:

Construction measures in the rainy season: Due to the climate characteristics of Dingxi City, rainfall is low, so there are no special requirements here. Just prepare materials and materials for normal rainy season construction. 1. Establish an on-site drainage system to drain rainwater on the ground and in the site into the scheduled discharge outlets in an organized and timely manner. Drainage ditches should be set up around the tower crane foundation, on both sides of the road and around the building to ensure smooth water flow and no sinking, slipping or water retention after rain. Water retaining facilities should be installed at passage entrances, window openings, ladder well entrances, etc. 2. All mechanical sheds and towers should be installed tightly to prevent rain leakage, and measures should be taken to prevent rain and flooding for mechanical and electrical equipment. Install a grounding safety device. The switch box should be protected from rain and leakage. The grounding protection device should be sensitive and effective. All kinds of wires should be protected from water immersion and leakage. 3. Set up drainage ditches and water collection wells below the ground such as troughs, pits, ditches, etc., prepare water pumps to remove accumulated water in a timely manner, and concrete the drainage ditches and water collection wells to ensure a clean and tidy site. 4. Prepare lightning protection facilities. Install lightning protection devices on tower cranes and elevators, and carefully check and implement grounding systems. 5. During a storm, focus on safety inspections to prevent scaffolding from loose connections and slipping. 6. During construction in the rainy season, pay attention to the following matters in terms of project quality: ① The masonry must not be too wet to prevent wall slippage, and strengthen the review of the verticality and elevation of the existing masonry. ② When pouring concrete, you need to know the weather forecast for 2-3 days first, and try to avoid heavy rain. When it rains when pouring concrete, immediately set up a rainproof shed and cover the poured concrete with waterproof materials. ③ In case of heavy rain, exterior decoration construction should be stopped, and measures should be taken to protect and cover the finished products. Completed and semi-finished products should be repaired promptly after the rain. ④ Measure the moisture content of sand and stone in time, grasp the range of changes, and adjust the mix ratio in time. ⑤ Strengthen the coverage and moisture-proof measures for raw materials, especially cement to prevent moisture change, and strengthen the storage of steel to avoid rust. Semi-finished steel bars are placed on a 20cm pad to avoid flooding and mud. ⑥ Backfill the foundation pit in time to reduce the exposure time of the foundation pit. ⑦ During rainy season construction, pay attention to the following safety points: A. Strengthen safety education, carefully carry out flood prevention, lightning protection, electric shock prevention, fire prevention, storm prevention, slip prevention, heat stroke prevention, etc., and implement them to the team through briefing. B. Stop all lifting operations when it rains heavily. The tower crane performs lightning protection and grounding. At the end of the work, the tower crane fastens the road clamps and hangs the hook. C. Frequently check the construction electricity, switch boxes, and mechanical and electrical equipment to have complete protective connections and reliable rain and moisture-proof measures. The insulation must be good, prevent leakage, install a leakage protector, hand-held power tools, and wear all personal safety protection supplies. D. Try your best to improve the working environment, adjust working hours, and set up *** medical first aid personnel on the construction site to handle emergencies. What does the Sinopec refueling machine safety inspection include?

When customers go to gas stations to refuel, the refueling machine is a fuel supply equipment that is in direct contact with customers, so its safety performance is very important. It is necessary to ensure that customers can To add oil safely and securely, the tanker must be inspected frequently. Here we briefly introduce the contents of several tanker safety inspections:

Methods/Steps

1. Check the tanker There is no leakage in the triangular flange of the oil pipe, filter, oil and gas separator, meter, oil sight gauge, oil gun and other parts;

2. Check the sealing bolts of the inlet box of the motor, power box and junction box There is no looseness, which can ensure the sealing of electrical appliances;

3. Check the protective grounding wire of the motor and junction box and the connection with the grounding electrode should be firm and reliable;

4. Check the grounding wire of the oil inlet pipe of the tanker The connection to the ground electrode should be firm. What are the contents of safety inspection on construction sites

Safety inspection contents:

1. Management

(1) The site layout is reasonable, with project management signs, Safety warning signs and project owners.

(2) There are full-time safety officers, and there are records of pre-shift meetings and safety inspections.

(3) Dangerous operations must have safety measures and safety responsible persons.

(4) Safety activities should be carried out regularly and records must be kept.

(5) Register potential accident hazards and make rectifications within a time limit.

2. Requirements for construction workers

(1) Wear labor protection supplies and use protective tools correctly.

(2) During work, you are not allowed to wear slippers, high heels or go barefoot, or do anything unrelated to work.

(3) Special types of work must be held with a certificate.

(4) It is not allowed to arbitrarily dismantle or move various protective devices, facilities, and signs.

(5) It is not allowed to go to work after drinking, and it is not allowed to climb into the car, jump out of the car, forcibly hitchhike or block the car.

(6) Smoking, using open flames, etc. are not allowed in areas where fireworks are prohibited.

(7) If hot work is required in the work area, a hot work sign must be issued.

(8) Non-construction personnel and unrelated personnel are not allowed to enter the work site.

(9) Work within designated areas and are not allowed to enter unrelated areas.

(10) When doing designated work, do not accidentally touch equipment or move irrelevant equipment.

3. Construction site

(1) Materials are stacked neatly and stably, tools and tools are placed in an orderly manner, and garbage is piled up in categories and disposed of in a timely manner.

(2) The site should be cleaned when work is stopped, and the site should be thoroughly cleaned after the work is completed.

(3) Maintain adequate lighting.

(4) Heatstroke prevention measures should be taken in summer and antifreeze measures should be taken in winter.

4. Hazardous work areas

(1) Railings or obvious warning signs must be provided on edges such as slopes, air surfaces, and water surfaces.

(2) There should be protective fences or covers for openings, etc., and there should be obvious warning signs.

(3) Isolation and protection measures should be taken for multi-layer operations and a dedicated person should be responsible for supervision.