Pipeline for delivering engine waste gas post-processing medium

A technology for exhaust gas after-treatment and conveying pipelines, which is used in engine components, machines/engines, pipeline protection, etc., and can solve the problem that the exhaust gas after-treatment system cannot be put into work normally

Active Publication Date: 2009-07-08
NANJING AOLIAN AE&EA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, once the urea-water solution in the pipeline is frozen, the exhaust gas after-treatment system c

Method used

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  • Pipeline for delivering engine waste gas post-processing medium
  • Pipeline for delivering engine waste gas post-processing medium

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Embodiment Construction

[0011] see figure 1 with figure 2 , The delivery pipe (1) of the present invention is made of polytetrafluoroethylene material, which has the characteristics of high and low temperature resistance, acid and alkali corrosion resistance, non-stick, self-lubricating, and excellent dielectric properties. The length of the conveying pipe (1) is designed according to the actual installation requirements. Its surface is provided with equally spaced spiral grooves (2) with a depth of about 0.5mm from one end to the other. The distance between the grooves (2) can be determined according to The resistance, resistivity, length, diameter and other requirements of the heating material are set. The heating wire (5) is covered with an insulating layer (7) made of polytetrafluoroethylene material to prevent the occurrence of a short circuit when the heating wire (5) is staggered, and also to prevent the heating wire (5) from being stored and working. oxidized and corroded. Before winding,...

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Abstract

The invention relates to a conveying tube for conveying an exhaust post-treatment medium of an engine. The conveying tube comprises a conveying tube (1), joints (3), a heater strip (5), a lead wire (6), a wire connecting terminal (9) and an insulating layer (10), wherein a groove (2) used for assembling the heater strip (5) is arranged on the surface of the conveying tube (1); two joints (3) are connected with two ends of the conveying tube in an interference fit mode respectively; and the heater strip (5) is connected with the wire connecting terminal (9) through the lead wire (6). The conveying tube has the advantages of simple structural manufacture, long service life, accurate performance and high reliability, is particularly applicable to an exhaust post-treatment device of a diesel motor, not only has the function of conveying a urea solution, but also has the function of heating and melting the urea solution under the condition that the urea solution is refrigerated and iced, and can strictly control heating power and temperature so as to ensure that urea cannot be decomposed at a high temperature.

Description

technical field [0001] The invention relates to a delivery pipeline for transporting engine exhaust gas post-treatment medium, especially a pipeline with electric heating function for transporting exhaust gas post-treatment medium, especially urea-water solution. Background technique [0002] With the increasingly wide application of diesel vehicles and the increasingly stringent emission standards of diesel vehicles, diesel vehicles must use exhaust after-treatment devices on engines after Europe. The device uses an aqueous solution with a medium concentration of 32.5% urea, sprayed through a pump device, and chemically reacts with nitrogen oxides in the engine exhaust to achieve the purpose of reducing engine emissions. However, once the urea-water solution in the pipeline is frozen, the exhaust gas aftertreatment system cannot work normally, especially in the northern regions with cold winters, this problem is more prominent. Therefore, how to realize the heat preservati...

Claims

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Application Information

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IPC IPC(8): F16L53/00F16L59/02H05B3/44F01N3/20B01D53/94
Inventor 武龙刘军胜涂平华
Owner NANJING AOLIAN AE&EA
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