Electromagnetic valve type urea solution injector

A technology of solenoid valves and injectors, which is applied in the direction of machines/engines, chemical instruments and methods, mechanical equipment, etc., can solve problems such as urea crystallization blocking nozzle holes, achieve the effects of lowering working temperature, improving heat dissipation effect, and improving reliability
CN102108891BActive Publication Date: 2012-11-14LIUZHOU YUANCHUANG EFI TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
LIUZHOU YUANCHUANG EFI TECH
Publication Date
2012-11-14

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Abstract

An electromagnetic valve type urea solution injector relates to an injector, and comprises an electromagnetic valve type injecting body, and an injecting nozzle, wherein the electromagnetic valve type injecting body and the injecting nozzle are connected into a whole through an injecting nozzle connecting rod; the injecting nozzle comprises a valve seat, a sealing steel ball mounted at a valve, aspraying orifice plate provided with a spraying orifice and mounted at the front end of the valve, and a step hole is formed between the front end part of the valve seat and the spraying orifice plate to form a turbulent cavity A ; a heat-insulating sleeve is arranged on an excircle at the front end of the valve seat for preventing heat energy of a tail gas discharge pipe from passing into the injecting nozzle; and a single-orifice atomization structure is arranged in the injecting nozzle. The electromagnetic valve type urea solution injector can work in high-temperature and high-speed gas with long-term stability and very high reliability, has low possibility of blockage, and better solves the problem that the spraying orifice can be blocked up by urea crystals. The invention also has the advantages of low manufacturing cost, short maintenance time of the product, reasonable structure and convenience in installation, etc.
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Description

technical field

[0001] The invention relates to an injector, in particular to a urea solution electromagnetic valve injector used in a high-temperature and high-flow-velocity gas environment. Background technique

[0002] One of the current treatment methods for diesel engine exhaust emissions is to use urea solution solenoid valve injector to directly spray urea solution into the exhaust pipe. Nitrogen is reduced to nitrogen gas and water. Because the nozzle of the urea solution electromagnetic valve injector is directly placed in the high temperature and high velocity gas above 600Β°C, it is easy to have urea crystallization to block the nozzle hole and deformation of the nozzle plate when it is used for a long time. Contents of the invention

[0003] The main technical problem to be solved by the present invention is to provide a urea solution solenoid valve fuel injector so that the fuel injector can work stably for a long time in high temperature and high velocity gas...

Claims

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