CN215633466U

CN215633466U - Double-filter type fuel filter element assembly

Info

Publication number: CN215633466U
Application number: CN202120906107.8U
Authority: CN
Inventors: 黄建栋; 蔡益利; 饶春燕; 叶南海; 符余; 刘万斌
Original assignee: Zhejiang Universe Filter Co
Current assignee: Zhejiang Universe Filter Co
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-25
Anticipated expiration: 2031-04-25

Abstract

The invention discloses a double-filter type fuel filter element assembly applied to an automobile filter, which comprises filter paper, a central tube, an upper end cover and a lower end cover, wherein the upper end cover is provided with an extension part and serves as an oil outlet of the upper end cover, an inner layer filter element is arranged in the central tube, the inner upper end cover of the inner layer filter element is sleeved with the outer upper end cover, and the inner lower end cover of the inner layer filter element is sleeved with the outer lower end cover through a buckle. And an oil-water separation layer is arranged on the inner filter paper of the inner filter element. According to the invention, the filter paper of the outer-layer filter element is used as a main filter for filtering particle impurities in the fuel oil, and the oil-water separation layer on the inner filter paper of the inner-layer filter element can be used for thoroughly separating water in the fuel oil, so that the fuel oil is filtered by the outer-layer filter element and the inner-layer filter element at two stages and is discharged through the oil outlet of the upper end cover, the service life of the filter element assembly is prolonged, the maintenance cost is reduced, and the filtering quality of the filtering system is obviously improved.

Description

Double-filter type fuel filter element assembly

Technical Field

The invention relates to a filtering system, in particular to a fuel filter element assembly.

Background

At present, the fuel filter element assembly that fuel filter assembly was used sets up the filtration mode for single filter core, and oil-water separation effect is not very ideal for filter element assembly life is shorter, has increased the maintenance cost, has influenced the filtration quality of filtration system.

SUMMERY OF THE UTILITY MODEL

The invention aims to overcome the defects of the technology and provide the double-filter type fuel filter element assembly with good oil-water separation and longer service life.

The purpose of the invention is realized by the following technical scheme: the double-filter type fuel filter element assembly comprises filter paper, a central tube, an upper end cover and a lower end cover, wherein the upper end cover is provided with an extending part protruding outwards and serves as an oil outlet of the upper end cover, an inner filter element is arranged in the central tube, the inner upper end cover of the inner filter element is sleeved with the outer upper end cover, and the inner lower end cover of the inner filter element is sleeved with the outer lower end cover through a buckle.

The inner filter element comprises an inner upper end cover, an inner lower end cover, an inner central tube and inner filter paper, and an oil-water separation layer is arranged on the inner filter paper.

After the structure of the invention is adopted, the filter paper of the outer filter element is used as the main filter for filtering particle impurities in the fuel oil, and the oil-water separation layer on the inner filter paper of the inner filter element has very small resistance to the fuel oil and very large resistance to water, so that the water in the fuel oil can be thoroughly separated out, and the fuel oil is filtered by the outer filter element and the inner filter element at two stages and is discharged through the oil outlet of the upper end cover, thereby prolonging the service life of the filter element assembly, reducing the maintenance cost and obviously improving the filtering quality of the filtering system.

Drawings

The invention is described in further detail below with reference to the figures and embodiments.

Fig. 1 is a schematic structural view of a dual filter fuel filter cartridge assembly according to the present invention.

Fig. 2 is a schematic view of the inner filter element in fig. 1.

Fig. 3 is a schematic structural view of the upper end cap in fig. 1.

Detailed Description

Referring to fig. 1 and 2, the dual-filter type fuel filter element assembly applied to an automobile fuel filter of the present invention includes a filter paper 8, a central tube 6, an upper end cap 3, and a lower end cap 10 (which constitutes an outer filter element), wherein the upper end cap 3 has an outwardly protruding extension 31 as an oil outlet of the upper end cap (i.e., the oil outlet of the filter element assembly is like a bottle mouth), an inner filter element 7 is installed in the central tube 6, an inner upper end cap 71 of the inner filter element 7 is sleeved with the outer upper end cap 3, and an inner lower end cap 72 of the inner filter element 7 is sleeved with the outer lower end cap 10 through a buckle 76. The inner filter element 7 (the structure of which is basically the same as that of a common filter element) comprises an inner upper end cover 71, an inner lower end cover 72, an inner central tube 73 and inner filter paper 74, wherein an oil-water separation layer 75 (coated in a coating mode) is arranged on the inner filter paper 74, has small resistance to fuel oil, can enable the fuel oil to pass through smoothly, has large resistance to water, can separate water in the fuel oil, and enables water molecules to gather outside the inner filter element and deposit at the bottom of the filter to remove the water. The filter paper 8 of the outer filter element is used for mainly filtering particle impurities in the fuel oil. The fuel oil is filtered by the outer layer filter element and the inner layer filter element at two stages and is discharged from the oil outlet of the upper end cover, so that the service life of the filter element assembly (oil-water separation) is prolonged.

As shown in fig. 1 and 3, a gasket 1 is installed at the oil outlet of the upper end cover 3, and a plurality of exhaust holes 21 (i.e., the original oil outlet is a through hole, and the oil outlet is semi-closed and has exhaust holes) are formed at the matching position of the oil outlet of the upper end cover 3 and the gasket, so that the gasket is used as a one-way valve to prevent oil in the filtering system from flowing back to the oil tank through the power pump, and can be used for separating oil passages and preventing mutual interference. And the exhaust hole of the upper end cover is arranged, so that the internal gas of the filter element assembly can be exhausted by passing through the exhaust hole and opening the gasket, and flameout caused by excessive air in the oil path can be effectively prevented.

Claims

1. Double filter formula fuel filter element group spare, including filter paper, center tube, upper end cover, bottom end cover, its characterized in that: the upper end cover is provided with an extension part protruding outwards to serve as an oil outlet of the upper end cover, an inner layer filter element is arranged in the central tube, the inner upper end cover of the inner layer filter element is sleeved with the outer upper end cover, and the inner lower end cover of the inner layer filter element is sleeved with the outer lower end cover through a buckle.

2. The dual filter fuel filter cartridge assembly of claim 1, wherein: the inner filter element comprises an inner upper end cover, an inner lower end cover, an inner central tube and inner filter paper, and an oil-water separation layer is arranged on the inner filter paper.

3. The dual filter fuel filter cartridge assembly of claim 2, wherein: the oil outlet of the upper end cover is provided with a gasket, and a plurality of exhaust holes are formed in the oil outlet of the upper end cover and the part matched with the gasket.