Stable silicon controlled rectifier (SCR) urea injector easy to control

A technology of injectors and urea, applied in the direction of machines/engines, chemical instruments and methods, mechanical equipment, etc., can solve the problems of insufficient electromagnetic force, cost waste, poor spray effect, etc., to reduce danger, slow down wear, Ensure consistency and stability of the effect

Active Publication Date: 2014-05-07
钧风电控科技泰州有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as insufficient electromagnetic force, poor spray effect, and waste of cost in similar products so far.

Method used

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  • Stable silicon controlled rectifier (SCR) urea injector easy to control
  • Stable silicon controlled rectifier (SCR) urea injector easy to control
  • Stable silicon controlled rectifier (SCR) urea injector easy to control

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention comprises valve seat pair 1, solenoid valve part 8, spacer ring 4, spring 6, spring seat 7, limit pin c7, connecting device, wherein one end of valve seat pair 1 is the injection end, and the other One end is provided with spacer ring 4. One end of the solenoid valve component 8 is a terminal, and the other end is provided with a center hole I, which houses a limit pin c7 and a spring seat 7 and a spring 6 sleeved thereon; the valve seat pair is provided with a spacer One end of the ring 4 is connected with the other end of the solenoid valve part 8 through a connecting device.

[0026] The valve seat couple 1 includes a sliding fit valve seat a3 and a valve core assembly, the valve core assembly includes a valve core a2 and an armature a1, wherein the valve core a2 is a stepped shaft structure with a conical su...

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PUM

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Abstract

The invention relates to a diesel engine exhaust post processing device, in particular to a stable silicon controlled rectifier (SCR) urea injector easy to control. The injector comprises a valve seat couple, an electromagnetic valve part, a spacer ring, a spring, a spring seat, a limit pin and a connection device. The valve seat couple comprises a valve seat and a valve core assembly which are in sliding fit. The valve core assembly comprises a valve core and an armature. One end of the valve core is inserted into a middle hole of the valve seat, and the other end stretches out of the valve seat to be connected with the armature. The spacer ring is sleeved on the valve core and located between the armature and the valve seat, one end of the spacer ring is in abutting connection with the end face of the valve seat, a countersink is formed in the other end face, and the armature is contained in the countersink. One end of the electromagnetic valve part is a wiring end, a center hole I is formed in the other end in the axial direction, the limit pin and the spring seat and the spring which are sleeved on the limit pin are contained in the center hole I, and the limit pin is higher than the end face of the electromagnetic valve part. One end of the valve seat couple with the armature is connected with the other end of the electromagnetic valve part through the connection device, and the other end of the spacer ring is in abutting connection with the other end face of the electromagnetic valve couple. The urea injector is sufficient in electromagnetic force and good in spraying effect and saves cost.

Description

technical field [0001] The invention relates to equipment for post-treatment of diesel engine exhaust, in particular to an easy-to-control and stable SCR urea injector. Background technique [0002] For diesel engines to meet the national IV emission standards, the selective catalytic reduction system SCR (Selective Catalytic Reduction) technology is more suitable for the development needs of the Chinese market. Its advantage is that there is no need to modify the body, that is, the national III electronically controlled bare metal can be realized with SCR technology National IV emission standard; good engine durability, good fuel economy, low requirements on fuel and oil quality, no risk of catalytic converter clogging, better continuity of technical upgrades after National IV, and low maintenance costs. However, there are still problems such as insufficient electromagnetic force, poor spray effect, and waste of cost in similar products so far. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20B01D53/94
CPCY02T10/12
Inventor 李波王雷解芳赵莹
Owner 钧风电控科技泰州有限责任公司
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