In case of preparation. The maintenance-free bearing with a maximum paving width of 3.7 spiral spreader conveyor, the hydraulic oil filter of the province of 5., can provide the most reliable protection, so that the maintenance time of the main components in the conveying system can be shortened. The large amount of hot air and fumes released from the screed and screed are treated by the SmokEater ventilation control system and vented to the atmosphere to keep operators and ground workers away from harmful gases. The PF4410 paver is powered by the Cunlmins turbocharged diesel engine with a power of 108 kW, making the actual productivity of the paver up to 7051. The new concrete pump developed by the Russian Institute of Construction and Road Construction Machinery. It uses a special combustion chamber to produce exhaust gas from the combustion of gasoline and air to drive the concrete mixture along the conveying pipe. Compared to hydraulic concrete pumps, this new concrete pump does not require complex and expensive hydraulic equipment, as well as concrete pumping cylinders and hydraulic cylinders, resulting in a significant reduction in material wear. The new concrete pump 1 consists of two parts, a combustion chamber 10 and a concrete pressure feed section. The combustion chamber is provided with an exhaust valve 9 which is pressed against the valve seat by a spring 1. The combustible mixture of gasoline and air is supplied to the combustion chamber through the passage 13. The air in the passage is supplied by a small compressor, and the fuel pump supplies the gasoline. Spray into the mixing chamber. The oil-gas mixture gas pressure spring in the passage 13 is topped open to the helium gas valve, which fills the combustion chamber 1 and the valve 9 is always pressed against the valve seat when the combustion chamber is inflated. A spark plug 3 is installed in the combustion chamber, and a valve groove 2 is formed in the valve stem of the valve 9, so that the top of the combustion chamber communicates with the atmosphere. The concrete conveying section has a feeding hopper 5 for loading the concrete material 6, and a valve 4 is arranged at the bottom of the hopper. The concrete material 6 can enter the pressure chamber 8 through the valve 4, and is pressed against the concrete conveying pipe 7 to move in the direction of the arrow. After the combustion chamber is full, the intake valve is closed, the spark plug ignites the oil and gas mixture, the pressure in the combustion chamber rises sharply, the force balance acting on the valve 9 is broken, the valve 9 is opened, and the exhaust gas generated by the combustion of the mixed gas enters the pressure chamber. 8, acting on the concrete to force it to move along the conveying pipe. At this time, the valve 4 is closed. After the end of the combustion, the pressure in the combustion chamber drops to the atmospheric pressure level, and under the action of the spring 1, the valve 9 falls onto the valve seat, the combustion chamber is closed, and the lower cycle begins. It was found in the test that the maximum pressure generated in the combustion chamber is related to the supply pressure. When the supply pressure is 55 0.65MPa, the bursting pressure can reach 5MPa, the temperature outside the combustion chamber can reach 12, increase the volume of the combustion chamber, and the productivity of the concrete pump can be improved; when the concrete pump conveys a distance of 120 claws, the combustion chamber The volume is 14.53 22.2 Mountain 29.7 Mountain, the productivity is 15,1330 claws 3 to 48 claws 3, the pneumatic concrete chestnut can reach 250,1 conveying capacity, and will not affect the quality of the concrete being pumped. POWERFUL COMPACT FLASHLIGHT - The TAC upgraded LED casts a wide beam that effortlessly illuminates a whole room or backyard, yet remains small enough for every day carry (EDC). Conveniently powered for hours with 3 AAA batteries or a single 18650 rechargeable battery. (Batteries not included.) Best Flashlight,Brightest Flashlight,Mini Flashlights,Nebo Flashlight Ningbo Wason Lighting Technology Co.,Ltd , https://www.wasonlights.com
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