Abstract: Fire damper, smoke fire damper test items include five: temperature sensor performance test; shutdown reliability test; salt spray test; air leakage test; fire test. This topic is mainly for the latter two experiments. Keywords: fire damper smoke fire damper temperature sensor fire damper, smoke fire damper test items include five: temperature sensor performance test; shutdown reliability test; salt spray test; air leakage test; fire test. This topic is mainly for the latter two experiments. (A) the concept of fire damper, smoke damper Fire damper is installed in the ventilation, air conditioning system to send and return air lines, usually was open, the fire when the gas temperature in the pipeline reached 70oC automatically shut down, in a certain Time to meet the requirements of fire-resistant stability and fire integrity requirements, play the role of smoke valve fire. Exhaust fire damper is installed in the exhaust pipe, usually open state, the fire when the gas temperature in the pipe reaches 280oC automatically shut down within a certain period of time to meet the fire resistance stability and fire integrity requirements. Smoke from the fire from the role of the valve. (B) the role of fire damper A complex air supply and exhaust system, piping complex. In the air supply system, the air sent by the air blower must be distributed to each branch pipe through the main pipe; in the exhaust or smoke exhaust system, the wind or smoke is collected by each branch pipe into the main pipe and then discharged into the exhaust fan. So, whether it is the air supply system or exhaust system, if there is no obstruction, then the amount of air supply and exhaust can not control the amount of air supply and exhaust parts do not need to send air or smoke, the situation, and Need to send air or smoke exhaust parts are not air, smoke or just a small amount of air, smoke. In order to do not need to send air, exhaust pipe parts cut off, which requires the valve device. In addition, the air supply and exhaust systems in various parts of the air though calculated through the pipeline, and the corresponding pipeline design. However, on the one hand there is a certain deviation between the theoretical calculation and the actual situation. On the other hand, the operating conditions of the system are constantly changing. Therefore, the air volume of each part of the system must be adjusted accordingly, which in turn requires the valve device. Also, some ventilation equipment, such as centrifugal fans, etc., is best to start at no-load start, because this motor starting current minimum, safe and beneficial. This requires the system before cutting off the pipeline. When the fan inlet and outlet with a switch, the general import or export can be closed, such as import and export without a switch, you must control the valve device. (C) fire damper, smoke damper set Ventilation, air-conditioning system pipe fire damper, smoke exhaust system in the pipe set fire smoke valve to prevent the fire when the toxic gas transmission, causing the fire spread to expand and Toxicity increased. 1. Ventilation and air-conditioning systems in one of the following conditions should be set on the air duct fire damper: (1) pipe through the fire partition partition; (2) pipe through the ventilation, air conditioning room and important or fire risk of large rooms Partition wall and floor; (3) horizontal duct at the intersection of vertical duct and horizontal duct at each level. (4) The pipe crosses both sides of the deformation joint. The parts of the fire damper, when the fire in the pipe when the gas temperature reaches 70oC, then automatically shut down. 2. The separation of the exhaust system: (1) In the population of the exhaust room, set the smoke damper can automatically shut down when the flue gas temperature exceeds 280oC. Exhaust fan should be guaranteed at 280oC continuous operation 30min; (2) set in the exhaust manifold when the flue gas temperature exceeds 280C can close their own smoke fire damper. (D) to carry out the significance of this study Fire damper, smoke damper as a building fire prevention, smoke control system is an important part of its quality is directly related to the success or failure of the above system settings, building fire safety And evacuation of personnel safety. Whether for suppliers, users, or fire supervision department, are very concerned about the quality of their good or bad. Therefore, the perfect test methods, test methods and criteria have become the necessary measures to ensure its quality. Fire test as an important project of fire damper and smoke fire damper inspection and test, whether the test method is scientific and reasonable, whether it is economically feasible, test data Whether it is accurate and reliable, and whether the data acquisition and processing technologies are advanced, these methods and technologies have become the key to whether the guarantee measures can be popularized and applied. At present, ISO9000 certification enterprises in China have been more and more recognition and development, as a guarantee of product quality measures - test methods and means are necessary. Fire damper, smoke fire damper fire test methods and data acquisition and processing system research, both to help develop a scientific and rational way of determination and testing, but also help to promote the application of this guarantee measures in manufacturing enterprises, and better Ensure fire damper, smoke damper product quality.
LINA Pelletizing-cooling Integrated Machine
LINA Pelletizing-Cooling Integrated pelletizing line centralizes all functions of a complete granulation line on one independent working platform. The pelletizing efficiency is 1-2 times higher than traditional masterbatch pelletizing production line. With the combination of PLC control system, LINA pelletizing-cooling integrated machine makes the granulation process easier, the working area smaller, labor cost lower and maintenance rate lower.
LINA CIM/MIM Twin Taper pelletizer
Twin taper forced feeding is adopted for mixed metal agglomerates, this feeding method is more efficient than traditional double wrist feeding method. Twin taper feeding is stable and feeding materials are uniform, it increases finished particles are uniform and full. This machine is specific for the granulation of high hardness, high strength and abrasion resistance materials, including stainless steel powder, iron powder, magnetic powder, zirconia, ceramic powder etc.
Main features
Oil shower lubrication system.
Material of barrel and screw: 38CrMoALA alloy steel nitride for 72 hours, polished and surface sprayed carbide.
Plunger type pelletizer (non-screw pelletizer): Feeding method of Plunger type pelletizer: hydraulic.
Applicable materials: High - end Inorganic nonmetal like zirconia ceramics.
Applicable to rare earth permanent magnet, magneto-optical, superconducting, hydrogen storage and other rare earth alloys.
Value Points:
1. Automation: Continuous kneading and pelletizing.
2. Eco-friendly: No gas masks needed while operating.
3. User-friendly: Quick release design for die head.
4. Modular: Based on user`s demand, manually material feeding can be updated to automatic weighted feeding.
Pelletizing-cooling Integrated
Pelleting-Cooling Recycling Equipment,Pelleting-Cooling Integrated System,Pelleting-Cooling Integrated Recycling
LINA Machinery Industrial Co.,Ltd , https://www.linakneader.com
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