Gasoline filter element

Abstract

The invention relates to a gasoline filter element, which comprises a framework, a locknut and a multilayer filtration fabric, wherein one end of the framework is provided with screw threads; the multilayer filtration fabric is provided with an opening; the screw threads of the framework pass through the opening of the multilayer filtration fabric; the locknut is connected with the screw threads of the framework; the multilayer filtration fabric is tightly locked on the framework; a flat gasket is arranged between the locknut and the multilayer filtration fabric; a sealing ring is arranged in the locknut; a uniform-pore space and dense-mesh meshed fabric is arranged near the outer sides of both ends of the multilayer filtration fabric; and the middle layer of meshed fabric is in a dense-pore space structure similar to non-woven fabrics, and the rest meshed fabrics close to the outer sides of both ends are in a large-pore space structure similar to asbestosed wire gauzes. Before the multilayer filtration fabric is produced, the meshed fabrics are separated into uniformly-distributed oil blocks by spot welding points in an ultrasonic spot welding mode, and the rest edges are welded in an ultrasonic mode except for an opening end. The gasoline filter element has the advantages of simple structure and low cost, and is a gasoline filter which can reach high filter precision and the excellent oil through properties or lipophilicity; in addition, the gasoline filter element solves the problem of the connection reliability of the traditional gasoline inlet, is different from the traditional paper filter element production process, can achieve the high conforming rate during batch production and high efficiency and is not restricted by different factors such as glue or inadequate pressure welding at seams and the like.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a gasoline filter device, in particular to a gasoline filter device in a normal pressure state. Background technique [0002] Gasoline-resistant single-layer nylon mesh gasoline filter elements with relatively dense mesh have been widely used in the automotive field with high-pressure gasoline, but in the low-pressure gasoline filtration state, in order to pursue good gasoline filtration accuracy, if the mesh is improved If the mesh number is too large, the oil permeability or lipophilicity of the filter element will decrease. [0003] When the multi-layer filter cloth is used in gasoline filtration, there is often a reliability problem with the gasoline inlet connection. The inlet connection will be not tightly sealed or fall off, which will directly lead to the failure of the filter device. [0004] The gasoline filter element made of special paper for internal com...

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Problems solved by technology

[0002] Gasoline-resistant single-layer nylon mesh gasoline filter elements with relatively dense mesh have been widely used in the automotive field with high-pressure gasoline, but in the low-pressure gasoline filtration state, in order to pursue good gasoline filtration accuracy, if the mesh is improved If the number of meshes is too small, the oil permeability or lipophilicity of the filter element will decrease.

[0003] When the multi-layer filter cloth is applied to gasoline filtration, there are often reliability problems with the connection of the gasoline inlet. The inlet connection may not be tightly sealed or fall off, which will directly lead to the failure of the filter device.

[0004] The gasoline filter element made of special paper for internal combustion engine filtration with glue on both ends is widely used in the field of gasoline filtration under normal pressure, such as the field of motorcycles, but after a long period of use, the special filter paper will fall off slender fibers , but caused pollution; and when the pollutants are close to the special paper, most of them adhere to the special paper, which reduces the life of the filter element

In addition, in the existing production process of special paper for internal combustion engine filtration, the amount and proportion of glue are uneven, and the joint sealing of special paper is difficult to control, and it is difficult to achieve all qualified

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