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Choosing Jiangsu Great Wall Intelligent Equipment Co., Ltd =Choosing Professional Technology+Professional Services

COMPANY INTRODUCTION

Choosing Jiangsu Great Wall Intelligent Equipment Co., Ltd =Choosing Professional Technology+Professional Services

Jiangsu Great Wall Intelligent Equipment Co., Ltd

iangsu Changcheng Intelligent Equipment Co., Ltd. was founded in 1984 and is one of the domestic enterprises specializing in the planning, design, manufacturing, installation, commissioning, and after-sales service of painting, final assembly, and conveying engineering projects.The company integrates research and development, sales, design, manufacturing, and services, covering project consulting, solution planning, system integration design, equipment research and development manufacturing, software research and development implementation, and full lifecycle three-dimensional after-sales services.

Hygiene and Safety in Painting Process Production

Hygienic issues with powder coatings Most powder coatings are composed of a mixture of resins, curing agents, leveling agents, pigments, fillers or matting agents, and other auxiliary components. Resins generally serve as adhesives, encapsulating other components in individual particles. At this point, other components cannot exist alone. Therefore, it greatly reduces the toxicity of other components such as pigments and fillers to the human body Powder coating, as a type of powder, is classified as organic dust in foreign countries, so it also has the common characteristics of ordinary dust and poses certain hazards Long term direct contact with powder coatings can cause irritation to the eyes, skin, mouth, and respiratory organs. If excessively inhaled into the human body (usual View more+
Common problem
Explosion hazards of paint and safety issues in decoration
An explosion occurred at an indoor decoration site, and two workers under construction were severely burned. According to the contractor, the explosion was caused by the gas volatilized from the paint coming into contact with sparks. At that time, two workers were carrying out decoration work on a 3-meter-high scaffold indoors. Due to poor ventilation, the newly painted room was filled with flammable paint gas that had evaporated. When the workers were dragging equipment, the iron equipment rubbed against the scaffold, causing sparks. Suddenly, a large ball of fire rose into the air, and the shock wave pushed the two workers under the scaffold. Now two workers are being rescued in the hospital due to inhaling a large amount of harmful gas during the explosion, which injured their lungs。 The reporter interviewed professionals in paint, indoor environment, and decoration on this matter. They said that in the current hot weather, safety awareness should be enhanced during decoration Frequent incidents of explosions and poisoning caused by paint Last November, an explosion caused by decoration occurred in a residential area located in Sanlihe, Beijing. It not only caused property damage to decoration materials, but also caused poisoning and casualties. It is understood that the main cause of this accident is the explosion caused by the volatilization of benzene in the paint thinner used during decoration. According to Song Guangsheng, director of the Indoor Environment Testing Center of the China Interior Decoration Association, there was an incident in Taiyuan last year where three people were poisoned and fainted due to painting, and one of them died。 Xylene is the main culprit causing explosions and poisoning It is reported that the main chemical components of paint are low boiling organic solvents such as xylene, esters, ketones, alcohols, ethers, etc. Among them, xylene is a common component in various types of paint. The above explosions and poisoning incidents were all caused by the accumulation of high concentrations of xylene indoors. Benzene is a colorless liquid with a special aromatic odor, with a boiling point of 80.1 ℃. Xylene is a homologue of benzene. At present, xylene is often used as a solvent or diluent for various adhesives, paints, coatings, and waterproofing materials in indoor decoration instead of pure benzene. Benzene has the characteristics of being volatile, flammable, and vapor explosive. When a person inhales high concentrations of xylene in a short period of time, they may experience anesthesia in the central nervous system. In mild cases, dizziness, headache, nausea, chest tightness, fatigue, and confusion may occur, while in severe cases, they may become unconscious and die due to respiratory and circulatory failure Experts remind construction personnel undergoing renovation to pay attention to the following issues during construction in hot summer weather: When brushing paint, it is necessary to follow the construction requirements of the specifications, that is, to carry out it in a ventilated and dry environment. Excessive indoor humidity can affect the formation of paint film and the gloss of the paint. Only with good ventilation can the volatile flammable and harmful gases be evacuated as soon as possible。 Paint and coating construction is afraid of wind and sand weather, as sand and dust falling on the paint film can affect the brushing effect. Therefore, this construction is generally carried out when the doors and windows are tightly closed. If the coating amount is large, the indoor temperature is high, the construction time is long, and the accumulated xylene gas in the indoor air is too high, it can lead to poisoning. In cases where ventilation is not sufficient in sandstorm weather, be sure not to stay in a closed room for too long。 Some projects should avoid working together. Construction projects such as painting and coating should not be done together with carpentry work such as furniture making, heating, and installing wooden floors。 Material stacking should be classified. Different materials such as wood, paint, and paint should not be mixed together or placed in one room, but should be placed separately. Flammable materials such as paint should be stored in a well ventilated area Smoking and throwing cigarette butts are not allowed at the construction site Fire extinguishers should be prepared at the construction site
Attention should be paid to the safety of high-voltage static electricity in electrostatic powder coating
The main coating method for powder coatings is the electrostatic powder coating method, which uses high-voltage static electricity with a voltage of 30-100kV. The voltage is very high, but the current is very small. Generally, the current that damages human organ is 5mA, while the current of the spray gun is 0.7mA, which is safe for human body. Some people are sensitive to high voltage electrostatic induction. When they touch them, they will obviously stimulate the body. Being frightened will cause secondary disasters and accidents. To avoid and prevent the occurrence of such accidents, attention should be paid to the following issues    When spraying, a high-pressure generator should be installed inside the spray gun. It is not advisable to use high-voltage cables to connect the spray gun and the spray gun of the high-voltage generator. If it is necessary to use this type of high-voltage cable spray gun, measures must be taken to prevent cable leakage and discharge problems, in order to avoid accidents    The voltage used should be controlled below 9WV, exceeding this voltage will be detrimental to the human body's home immunity. In addition, the short-circuit current should be controlled below 0.7 μ A    In order to eliminate static charges as soon as possible, during manual spraying, the spray gun should immediately contact the grounding conductor after use to release residual charges in a timely manner. At the same time, the human body should not be insulated from the ground, and the charges on the human body should be eliminated in a timely manner. The distance between the coated object and the nozzle should not be too close, and should be maintained at least 10cm to prevent short circuits from generating electric sparks
Safety Related Standards for Painting Operations in China (II)
9. Health protection measures must be taken: ——The harmful factors in the operating area (such as harmful substances, temperature, humidity, noise, lighting, etc.) must comply with the standards. ——Determine the level of hygiene characteristics, provide necessary hygiene auxiliary rooms, and equip emergency hygiene facilities. ——Conduct occupational health checks and regular testing for harmful factors. 10. Strictly control the safety performance of equipment: ——The equipment should have a reasonable structure that is easy to operate, maintain, and clean, sufficient strength, stiffness, and appropriate materials and connections. ——The equipment should also have necessary element control instruments, safety devices, and technical measures; Limiting overload and overvoltage safety devices; Surface temperature control of equipment in hazardous areas; Ignition energy, spark discharge safety distance control, high-voltage shielding; Pressure resistance and airtightness performance of pressure bearing devices; Emergency safety technical measures for emergencies. ——In addition, it also includes: product brands that comply with regulations (including specific projects), inspection certificates and user manuals (including safety content). 11. Configure interlocking and alarm devices to prevent the occurrence and expansion of disasters ——Interlocking device for controlling misoperation: misoperation sound and light signal device; Power outage interlocking devices that accidentally enter hazardous areas; Self locking devices for intermittent and manual operations; Interlocking devices for operation and ventilation systems. ——Interlocking devices for controlling equipment failures: interlocking and cut-off devices for power, paint supply, and ventilation devices; Interlocking device for ventilation and workpiece conveying system. ——Alarm and interlocking devices for controlling fire: temperature and concentration control alarm devices; Interlocking devices for fire alarm and power, workpiece conveying, and fire extinguishing systems; The interlocking device between the coating pressure conveying system, alarm device, and fire extinguishing system under specific conditions. 12. Pay attention to the safety performance of the workpiece conveying system in the painting assembly line ——The workpiece conveying system should be matched with the process, with a reasonable route and smooth operation. ——The spacing between workpieces is appropriate to prevent collisions. ——The design of the lifting appliance is reasonable to prevent the workpiece from falling off. ——Necessary grounding and anti-static measures should be taken. ——Measures to prevent external corrosion of lifting appliances. 13. Control on-site paint storage and transportation ——Set up a dedicated paint mixing room. ——Limit the chemical inventory of on-site coatings. ——The pipeline layout, materials and connections, coating flow rate, and coating supplementation for coating transportation must be placed within the safety control range. ——Strictly restrict the use of pressure conveying coating processes unless specific conditions are met. 14. Necessary purification facilities ——Reasonably select purification facilities for organic solvents and industrial wastewater (including heavy metals in water) based on different processes and discharge properties, quantities, and characteristics, and strictly control the safety performance of the purification facilities. ——The noise at the factory boundary should comply with environmental protection standards. 15. Paying Attention to the Personnel Control Link of Ergonomic System Safety ——Provide safety technical training for coating design, process, and operators. ——Establish rules and regulations for safe operation, equipment maintenance, and on-site management. ——Monitor, regularly inspect, maintain, and adjust equipment. ——Set up safety devices, protective devices, safety signs, and provide reasonable protective equipment for operators. 16. Special environmental operations and special group protection ——The limited space should strictly comply with relevant safety technical conditions such as ventilation, monitoring, explosion detection, and hot work. ——Implement a taboo labor scope system for women. ——Minors are prohibited from engaging in toxic and dusty operations. 17. Conclusion Painting safety is a highly comprehensive and comprehensive standard system with high technical requirements. Only 51 relevant fire protection, electrical, industrial hygiene, chemicals, environmental protection, labor safety, inspection methods, and industry standards are cited in the standard. Specific qualitative and quantitative technical requirements should also be consulted in the standard text.
Safety Related Standards for Painting Operations in China (1)
1. Preface Painting is the basic technical means used for product surface protection and decoration, and the painting operation covers various departments of the national economy. At present, the malignant development trend of painting hazards in China has been curbed, but occupational hazards are still severe, fire accidents are very serious, and environmental pollution is serious. Painting technology has made significant progress, but there is still a considerable proportion of outdated processes; There has been significant progress in protective engineering technology, but the overall safety level urgently needs to be improved. The occupational hazards of painting should be highly valued by relevant departments, and necessary measures should be taken to pay attention to them. Since the 1980s, China has initiated the standardization of painting safety. The standards that have been issued include: GB/T14441 Terminology, GB7691 Labor Safety and Health Management (revised and under approval), GB7692 Safety and Ventilation Purification of Painting Pretreatment Processes (revised and merged with GB7692 and 7693), GB6514 Safety and Ventilation Purification of Painting Processes (revised and merged with GB6514 and 6515), GB12367 Safety of Electrostatic Painting Processes, There are 11 standards, including GB15607 "Safety of Powder Electrostatic Spraying Process", GB17750 "Safety of Paint Immersion Process", GB14444 "Safety Technical Regulations for Painting Room", GB14443 "Safety Technical Regulations for Coating Drying Room", GB14773 "Safety Technical Conditions for Electrostatic Spray Guns and Auxiliary Devices", GB12942 "Safety Technical Requirements for Limited Space Operations". The basic points of the standard system are summarized as follows. 2. Restriction and elimination of coating products and processes that seriously endanger people's safety and health ——Actively promoting coatings and painting processes that are beneficial to human safety and health; ——Prohibit the use of coatings, diluents, and solvents containing benzene; Prohibit the use of paint containing lead white; Restricting the use of coatings containing red lead; It is prohibited to use shop primers containing benzene, mercury, arsenic, lead, cadmium, antimony and chromate; ——The use of benzene in pre-treatment processes is strictly prohibited; Prohibit the use of flame method to remove old paint; Prohibit the use of toluene, xylene, and gasoline in large-scale degreasing and old paint removal; Strictly restrict the use of dry sandblasting for rust removal. When revising GB7691, the scope of restrictions and elimination will be further increased and expanded: ——Raise the ban on paint containing lead white to a strictly prohibited use; Raise the limit of dry sandblasting for rust removal to prohibition of use; Add restrictions on the use of cleaning fluids containing dichloroethane; Limit the use of cleaning solutions containing chromate; 3. Implement chemical management for coatings, metal cleaning fluids, and chemical treatments ——The chemicals used in painting operations are managed under the International Labour Organization's 1990 Chemical Convention. ——Production units of coatings and related chemicals should register and evaluate the hazards of chemicals. ——Coatings and related chemicals must provide compliant labels, packaging, and safety technical manuals. ——All economic departments involved in production, operation, transportation, storage, and use must comply with relevant regulations. ——Imported coatings and related chemicals must provide a Chinese safety technical manual and be labeled in Chinese. 4. Reasonable selection and layout of process routes ——Choose coating processes and coatings that are conducive to human safety and health. ——Properly arrange the process route and adopt necessary isolation and spacing facilities. ——The paint booth cannot be used alternately for painting and drying, unless specific conditions are met. ——The leveling area and paint drip area must have local ventilation and paint drip collection devices. 5. Engineering design must comply with safety, hygiene, fire protection, and environmental requirements ——The workshop layout should not endanger the environment or other production operations. ——The painting workplace should be arranged on the top floor or side span. ——Determine the fire classification based on the flash point of the coating used, and comply with relevant regulations on fire resistance rating, fire separation, fire separation, factory explosion prevention, and safe evacuation. ——The selection of building structures, components, and materials should meet the requirements of fire and explosion prevention. 6. Reasonably divide and control hazardous areas separately ——Extremely hazardous areas. Paint areas or pre-treatment areas with hazardous amounts of flammable and combustible vapors, paint mist, dust, and accumulated combustible residues should be classified as extremely hazardous areas. Generally, electrical equipment is not arranged, and if necessary, electrical explosion-proof measures should be strictly controlled. ——Highly hazardous areas. Electrical explosion-proof areas where explosive vapors, paint mist, dust, and other mixtures may occur (including only short-term presence) should be classified as highly hazardous areas and electrical sparks should be strictly controlled. ——Moderately hazardous areas. Fire hazard areas prone to combustion shall be classified as medium hazard areas, and the inventory of combustibles and hazard that may cause open fire shall be strictly controlled. ——Mildly hazardous areas. Factories or designated spaces that are prone to combustion and specifically designed for painting operations should be designated as lightly hazardous areas, and all open flames and foreign flames should be prohibited from entering. 7. Focus on Electrical safety ——Strictly divide the electrical explosion-proof level and regional scope. The selection, design, installation, and acceptance of electrical systems must comply with the designated level range and specifications. The electrical system must include all related facilities such as equipment, wiring and their connections, fasteners, brackets, and light brackets, and no exceptions are allowed to ensure overall electrical safety. ——Correctly implement grounding and anti-static grounding. ——Take corresponding lightning protection measures. 8. Ventilation and protection technical measures must be taken ——Local ventilation should be the main method, supplemented by comprehensive ventilation. ——Personnel operating areas must use reasonable methods (such as wind speed, airflow organization, exhaust methods, suppression techniques, etc.) to ensure that the ventilation system achieves the goal of protecting personnel health. ——For ventilated enclosed spaces, reasonable methods (such as concentration calculation, temperature control, pressure relief, and prevention of paint scale deposition) must be selected to ensure that the ventilation system achieves the goal of ensuring safety. ——Reasonably select and arrange fans, pipelines, and their connections and fixation, and take necessary measures such as concentration detection, temperature control, electrical grounding, etc. to ensure that the ventilation system is in a safe, stable, and economical operation state.
COOPERATE PARTNER

Choosing Jiangsu Great Wall Intelligent Equipment Co., Ltd =Choosing Professional Technology+Professional Services

Cooperative partner CRRC China CAT timg2 timg BAIC Group CAMC Jianghuai Power