Oil injector of oil-fired heating furnace

Abstract

The invention discloses an oil injector of an oil-fired heating furnace and belongs to the technical field of oil injectors. The oil injector comprises a nozzle, an oil injector shell, a plunger sleeve, a plunger, a reset spring, a plunger sleeve abutting and fixing sleeve, a plunger adjusting rod, an electromagnetic coil and an electromagnetic coil shell. The plunger, the electromagnetic coil and the electromagnetic coil shell form an electromagnet, the plunger serves as an armature of the formed electromagnet and is installed in the plunger sleeve, the reset spring is located between the rear end of the plunger and the plunger adjusting rod, and an oil passing hole of the plunger adjusting rod, a vertical blind hole and a horizontal oil passing hole in the tail end of the plunger, a through hole in the tail end of the plunger sleeve, an oil groove in the outer wall of the plunger sleeve and an oil injection hole in the nozzle form an oil flowing and injection path. Swirl oil injection is achieved by means of the oil groove in the outer side wall of the plunger sleeve, and the atomizing effect is good; the plunger is controlled by the electromagnetic coil to move, and control over the oil injection state of the oil injector is achieved; when oil injection stops, an injection hole of the nozzle can be closed, instant oil cutoff is achieved, oil amount is precisely controlled, and the high-precision control requirements are met.

Description

technical field [0001] The invention belongs to the technical field of fuel injectors, and in particular relates to a fuel injector for a fuel heating furnace. Background technique [0002] At present, the fuel injectors used in heating furnaces on the market include pressure injectors, oil return injectors, rotary cup injectors, etc. During use, the injectors are installed on the furnace wall of the heating furnace , the nozzle part of the fuel injector is exposed to the inner wall of the heating furnace. Due to the special working environment (high temperature) of the heating furnace, the control valves and other control equipment that control the start and stop of the fuel injector are installed outside the furnace wall of the heating furnace. Since the control valve is located on the furnace wall On the outside of the wall, after the injector stops spraying, there is still a lot of fuel in the fuel injection channel of the injector, and the fuel will continue to burn unt...

AI Technical Summary

Problems solved by technology

[0002] At present, the fuel injectors used in heating furnaces on the market include pressure injectors, oil return injectors, rotary cup injectors, etc. During use, the injectors are installed on the furnace wall of the heating furnace , the nozzle part of the fuel injector is exposed to the inner wall of the heating furnace. Due to the special working environment (high temperature) of the heating furnace, the control valves and other control equipment that control the start and stop of the fuel injector are installed outside the furnace wall of the heating furnace. On the outside of the wall, after the injector stops spraying, there is still a lot of fuel in the fuel injection channel of the injector, and the fuel will continue to burn until it is completely burned. Continue to inject fuel, and the atomization effect is prone to be poor. If the fuel injector starts and stops frequently, the nozzle of the fuel injector will always be in a burning state, and the control will lose its effect, and it is easy to burn the burner

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