High-sealing type fuel oil filter element assembly

Abstract

The utility model discloses a high sealing type fuel oil filter element assembly which comprises an upper end cover assembly, filter paper, a center pipe and a lower end cover, the lower end cover is provided with a center through hole, and the center pipe is provided with a protrusion extending outwards and penetrates through the center through hole of the lower end cover. The protrusions are in a cylindrical shape with the center line of the center pipe and the center line of the filter paper as the symmetry center, and threads are arranged on the inner walls of the protrusions and arranged at the inner ends of the protrusions. The assembly concentricity of the center pipe and the filter paper can be kept consistent, the filter element assembly is more convenient and faster to assemble, the protrusions of the center pipe are in threaded butt joint with the blow-off pipe outside, oil stains and impurities in the filter element assembly can be discharged firstly during replacement and maintenance, the surrounding environment can be protected, and the service life of the filter element assembly is prolonged. The sealing end cover of the upper end cover assembly is respectively provided with an outer sealing element, an inner sealing element and an integrated structure of the outer sealing element, the inner sealing element and the connecting ring, so that the sealing performance and the assembly accuracy of the filter element assembly are practically enhanced, and the production efficiency and the quality of products are improved.

Description

Technical Field

[0001] The invention relates to a filtering system, in particular to a fuel filter element component applied to a filter. Background Art

[0002] At present, the fuel filter element assembly used in the filter generally includes an upper end cover, filter paper, a center tube, a lower end cover and other components. The upper and lower end covers are connected to the filter paper through a bonding layer (using adhesive), and the lower end cover is closed and connected to the center tube. The center tube is installed in the center of the filter paper and sometimes installation deviation occurs. The center tube and the filter paper are not assembled on the same center, and there is a problem of poor sealing. The upper end cover is a single component and only an external seal is installed on its periphery, which seriously affects the filtering and cleaning effects. Summary of the invention

[0003] The purpose of the present invention is to overcome the above technical deficiencies and provide a high-sealing fuel filter element assembly with consistent assembly concentricity between a center tube and filter paper and convenient installation.

[0004] The purpose of the present invention is achieved through the following technical solution: a high-sealing fuel filter element assembly includes an upper end cover assembly, filter paper, a center tube, and a lower end cover, wherein the lower end cover is provided with a center through hole, and the center tube has a protrusion extending outward and passing through the center through hole of the lower end cover.

[0005] The protrusion is symmetrically cylindrical with the center line of the central tube and the filter paper, and a thread is provided on the inner wall of the protrusion, and the thread is provided at the inner end of the protrusion. A sealing groove is provided on the inner wall at the outer end of the protrusion. The upper end cover assembly includes a sealing end cover, an outer sealing member is provided on the periphery of the sealing end cover, and an inner sealing member is provided on the upper end thereof. The sealing end cover is connected to the central tube through a connecting ring, and the sealing end cover and the connecting ring are an integrated structure.

[0006] After adopting the technical solution of the present invention, the center tube is effectively positioned at the center of the filter paper through its protrusion, so that the assembly concentricity of the center tube and the filter paper is consistent, and the assembly of the filter element assembly is more convenient. The protrusion is threadedly connected with the outer sewage pipe through the inner wall of the protrusion, which is convenient for discharging oil and impurities in the filter element assembly before replacement and maintenance, which is beneficial to protecting the surrounding environment. The sealing end covers of the upper end cover assembly are respectively equipped with outer seals, inner seals and their integrated structure with the connecting ring, which effectively enhances the sealing performance of the filter element assembly and the accuracy of assembly, thereby improving the production efficiency and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the high-sealing fuel filter element assembly of the present invention. DETAILED DESCRIPTION

[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0009] like Figure 1 As shown, the present invention is applied to a high-sealing fuel filter element assembly of an automobile fuel filter, comprising an upper end cover assembly 5, filter paper 3, a center tube 4, and a lower end cover 1, wherein the lower end cover 1 is provided with a center through hole 9, and the center tube 4 has a protrusion 6 extending outward and passing through the center through hole 9 of the lower end cover (that is, the center through hole 9 of the lower end cover is penetrated by the protrusion 6 of the center tube).

[0010] The protrusion 6 is cylindrical and symmetrical with the center line of the central tube and the filter paper. The inner wall of the protrusion 6 is provided with a thread 7, which is arranged at the inner end of the protrusion 6 (to facilitate the spiral docking of the inner part of the protrusion with the external sewage pipe thread, so as to facilitate the discharge of oil and impurities in the filter element assembly during replacement and maintenance, which is beneficial to protecting the surrounding environment). A sealing groove 8 is provided on the inner wall at the outer end of the protrusion 6 (to facilitate the installation of a sealing ring when docking with the external sewage pipe to enhance its sealing). The upper end cover assembly 5 includes a sealing end cover 51, on the periphery of the sealing end cover 51, an outer seal 52 is installed, and an inner seal 53 is installed at its upper end (embedded), and the sealing end cover 51 (the lower end thereof) is docked with the central tube 4 through a connecting ring 54, and the sealing end cover 51 and the connecting ring 54 are an integrated structure. The sealing end cover containing the inner and outer seals is connected to the connecting ring (the connecting ring assembled with the sealing end cover, such as Figure 1 The upper cover assembly 5 is composed of the sealing end cap 51, the outer seal 52, the inner seal 53, and the connecting ring 54. The central part of the upper cover assembly 5 and the inner seal 53, the connecting ring 54, together with the oil outlet of the center pipe 4, are connected to the oil outlet pipe (the oil inlet and the oil outlet are as shown in FIG. 1 ). Figure 1 As shown by the arrow in the figure). A bonding layer 2 (formed by bonding with an adhesive) is provided between the upper end cover assembly 5 (its sealing end cover 51 and the connecting ring 54) and the filter paper 3, and between the lower end cover 1 and the filter paper 3 to enhance the bonding performance.

Claims

1. A high-sealing fuel filter element assembly, comprising an upper end cover assembly, filter paper, a center tube, and a lower end cover, characterized in that: The lower end cover is provided with a central through hole, and the central tube has a protrusion extending outwards and passing through the central through hole of the lower end cover.

2. The high-seal fuel filter element assembly according to claim 1, characterized in that: The protrusion is symmetrical with the center line of the central tube and the filter paper and is cylindrical. The inner wall of the protrusion is provided with a thread, and the thread is arranged at the inner end of the protrusion.

3. The high-seal fuel filter element assembly according to claim 2, characterized in that: A sealing groove is provided on the inner wall at the outer end of the protrusion.

4. The high-seal fuel filter element assembly according to claim 1, characterized in that: The upper end cover assembly comprises a sealing end cover, an outer sealing member is arranged on the periphery of the sealing end cover, and an inner sealing member is arranged on the upper end thereof. The sealing end cover is butt-jointed with the central tube via a connecting ring, and the sealing end cover and the connecting ring are an integrated structure.

5. The high-seal fuel filter element assembly according to claim 1 or 4, characterized in that: An adhesive layer is provided between the upper end cover assembly and the filter paper, and between the lower end cover and the filter paper.

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