Vortex ejector

Abstract

The invention relates to a vortex ejector which comprises a tubular shell, an ejection switching valve, a ball valve, a valve rod, an electromagnetic valve assembly and a main spring. The shell is formed by welding a vortex ejector shell upper body, a fixed iron core, a vortex ejector shell lower body and an adjusting gasket. The ball valve, the valve rod, the main spring and a damping assembly are arranged in a tube. The ejection switching valve is composed of a valve seat and a guide part. The valve seat is matched with the ball valve, and the outer end face of the valve seat is integrally welded to the vortex ejector shell lower body. The guide part and the vortex ejector shell lower body are in interference fit, and a guide hole is formed in the guide part. The electromagnetic valve assembly can drive the ejection switching valve to control flowing and stopping of liquid flowing through the valve seat and comprises the fixed iron core, a winding coil and an armature, and the main spring is fixed in the fixed iron core. The valve rod can slide along the axis relative to the fixed iron core. The vortex ejector has the beneficial effects that the price is low, the structure is simple, the machining technology is simple, and the electromagnetic valve and the ejection valve are assembled in a split manner; and the vortex ejector is accurate in ejection and good in spray atomization quality.

Description

technical field [0001] The technical field of auto parts of the present invention relates to a vortex injector, which is suitable for the urea aqueous solution or diesel injection system of the diesel engine implementing the National IV and later emission regulations. Background technique [0002] With the dieselization of automobiles and the increasingly stringent national emission regulations, it is extremely urgent to solve the problem of diesel engine emissions. At present, Selective Catalytic Reduction (SCR) technology and Diesel Particulate Filter (DPF) technology are widely used around the world to deal with heavy-duty diesel engine emissions. For the SCR technology, the current problem is that the atomization particle size of the existing urea injector is large, and the mixture with the exhaust gas in the exhaust pipe is poor, thereby reducing the utilization rate of the urea aqueous solution; and the valve on the existing urea injector Urea crystals are easy to for...

AI Technical Summary

Problems solved by technology

For the SCR technology, the current problem is that the atomization particle size of the existing urea injector is large, and the mixture with the exhaust gas in the exhaust pipe is poor, thereby reducing the utilization rate of the urea aqueous solution; and the valve on the existing urea injector Urea crystals are easy to form around the rod body and the injection hole body, causing the injection hole to be blocked, so the reduction treatment effect on automobile exhaust is poor

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