Integral telescopic type water heating urea pipe

Abstract

The invention relates to an integral telescopic type water heating urea pipe which is characterized by adopting a scheme that a urea pipe is pressed on a first urea pipe joint; the urea pipe penetrates through a first integral type three-way joint; the first urea pipe joint is screwed to the first integral type three-way joint through threads; the urea pipe penetrates through a water pipe and then penetrates through a second integral type three-way joint and presses on a second urea pipe joint; the urea pipeline is butted with the second urea pipe joint through rotating the second integral type three-way joint; and finally a first clamp and a second clamp are used to clamp and seal two ends of the water pipe respectively by the first integral type three-way joint and the second integral type three-way joint. The structure of the integral telescopic type water heating urea pipe is simplified due to the adoption of the integral type three-way joints, and the parts of assembly are reduced; because the water pipe is sleeved outside the urea pipe and engine cooling water flows between a water heating pipe and the urea pipe to immerse the urea pipe, the heating efficiency is greatly improved; because the complete set of pipelines uses supporting frames to be fixed around a post treating system, the arrangement of the pipeline structure is very compact, and the installation is convenient.

Description

technical field [0001] The invention relates to an integrated casing type water heating urea pipeline, which is used for heating the urea pipeline of SCR Euro IV diesel engine. Background technique [0002] Based on the use of urea as an additive in SCR Euro IV diesel engines, the characteristic of urea is that it freezes at -11°C under ambient pressure. In order to ensure normal use in northern regions, urea must be heated and thawed to ensure normal liquid fluidity of urea. In the prior art, there are two general urea heating and defrosting strategies, which are electric heating and engine cooling water heating. The two heating and thawing strategies have their own advantages and disadvantages. The electric heating system is simple in layout and high in heating efficiency, but it is very expensive and has high requirements on the level performance of the vehicle. For the water heating system, the sealing and heating of the urea pipe joint Difficult, the urea pipeline asse...

AI Technical Summary

Problems solved by technology

The two heating and thawing strategies have their own advantages and disadvantages. The electric heating system is simple in layout and high in heating efficiency, but it is very expensive and has high requirements on the level performance of the vehicle. For the water heating system, the sealing and heating of the urea pipe joint Difficult, urea pipeline assembly and heating system layout are more complicated, heating efficiency is not high, but the price is much cheaper than electric heating

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