Engine exhaust gas filtering device

Abstract

The invention relates to the technical field of treatment of engine exhaust gas, in particular to an engine exhaust gas filtering device. A main body of the device consists of an inner cylinder and an outer cylinder; the inner cylinder is arranged in the outer cylinder, and is provided with an intake port and an exhaust port; the sectional area of an exhaust channel of the inner cylinder is gradually decreased in the direction from the intake port to the exhaust port; the inner cylinder is provided with a first exhaust port communicated with the exhaust port in the exhaust port; the cylinder wall of the inner cylinder is of a netty structure; an active carbon filter bin is arranged between the inner cylinder and the outer cylinder; a second exhaust port is formed in the outer cylinder; a baffle plate is arranged between the first exhaust port and the second exhaust port, and is provided with an exhaust hole; the baffle plate is provided with a filter screen in the exhaust hole; and an exchange port is formed in the outer cylinder. The device is reasonable in structure and convenient to use, and effectively prevents such problems as unsmooth exhaust of an engine and difficult starting due to exhaust gas barrier from a filter layer caused by high displacement of engine exhaust gas.

Description

technical field [0001] The invention relates to the technical field of engine exhaust gas treatment, in particular to an engine exhaust gas filtering device. Background technique [0002] Such as figure 1 As shown, in the existing engine exhaust gas purification device, no matter it is a single tube or a double tube, it includes an exhaust pipe main body 1' and a positioning pipe 2', and one or more layers are arranged inside the exhaust pipe main body 1'. The filter layer 3' allows the engine exhaust to be filtered through the filter layer 3' and then discharged into the atmosphere. However, in the actual operation of the engine, the exhaust gas discharge is large, and the exhaust gas slows down the speed of entering the atmosphere because of the obstruction of the filter layer 3'. It is easy to cause problems such as poor exhaust of the engine and difficulty in starting. Contents of the invention [0003] Therefore, the object of the present invention is to provide an ...

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Problems solved by technology

[0002] like figure 1 As shown, in the existing engine exhaust gas purification device, no matter it is a single tube or a double tube, it includes an exhaust pipe main body 1' and a positioning pipe 2', and one or more layers are arranged inside the exhaust pipe main body 1'. The filter layer 3' allows the engine exhaust to be filtered through the filter layer 3' and then discharged into the atmosphere. However, in the actual operation of the engine, the exhaust gas discharge is large, and the exhaust gas slows down the speed of entering the atmosphere because of the obstruction of the filter layer 3'. It is easy to cause problems such as poor exhaust of the engine and difficulty in starting

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