CN210799200U

CN210799200U - Fuel filter center tube with water separation and air management functions

Info

Publication number: CN210799200U
Application number: CN201922028643.8U
Authority: CN
Inventors: 张惠; 裴如义
Original assignee: Avic Xinhang Pingyuan Filter Co ltd
Current assignee: Avic Xinhang Pingyuan Filter Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-06-19
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a fuel filter center tube with water separation and air management functions, which comprises a tube body, wherein a center hole is arranged in the tube body, the tube body comprises an upper half section and a lower half section which are connected up and down, the lower half section of the tube body is provided with a hydrophobic filter screen structure, the outer wall of the tube body is provided with a spiral flow deflector, the spiral flow deflector and the outer wall of the tube body enclose a spiral flow channel, the upper end of the spiral flow channel is an exhaust end, and the lower end of the spiral flow channel is a drainage end and is used for connecting a drain hole on a lower end cover; the top of the pipe body is provided with a flat-cylindrical connecting port used for being connected with an upper end cover of the fuel filter, the bottom end of the connecting port is provided with an annular plate, the annular plate is provided with at least one air outlet, and the aperture of the air outlet is larger than or equal to 0.2 mm and smaller than or equal to 1.5 mm. The utility model discloses a same set of structure has solved the moisture content in the separation fuel simultaneously and has decomposed the great bubble in the fuel into the problem of tiny bubble, has reduced the volume of product, has saved the material cost, has improved the fuel feeding quality.

Description

Fuel filter center tube with water separation and air management functions

Technical Field

The utility model relates to a motor vehicle fuel filters technical field, especially relates to fuel filter's center tube.

Background

The fuel filter is used as an important part of an engine fuel system, and has the functions of filtering impurities, water and other pollutants in fuel, providing clean fuel, preventing a fuel spray nozzle from being rusted and blocked, avoiding carbon deposition in a combustion chamber of an engine, further ensuring the normal operation of the fuel system, improving the reliability and prolonging the service life of the engine.

With the improvement of the emission standard, the filtration requirement of the fuel filter in the industry is further improved; filtering the fuel while simultaneously extracting air from the fuel that, if left untreated, could directly enter the engine with the fuel, could lead to engine misfire or insufficient power. Influenced by oil products, the existing fuel filter is often in a situation of reduction and even failure of the water separation effect in fuel after being used for a period of time, and the normal work of a fuel system is difficult to guarantee.

At present, several enterprises which make filter ranking in the world, such as the Cummins filter system, the Mancumuer and the like, have some processing modes for separating out air and lifting water, but how to comprehensively consider and harmonize the relationship between the air and the lifting water, further optimize the structure to reduce the cost, and do not have good processing modes. To this end, it is desirable to provide a structure to uniformly solve the problem of exhaust gas and water separation to solve the above problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fuel filter center tube, the technical problem of unified solution exhaust and separation of water.

In order to achieve the purpose, the fuel filter center tube with the water separation and air management functions comprises a tube body, wherein a center hole is formed in the tube body, the tube body comprises an upper half section and a lower half section which are connected up and down, the lower half section of the tube body is provided with a filter screen structure, and the filter screen structure is made of hydrophobic materials; the outer wall of the pipe body is provided with a spiral flow deflector, the spiral flow deflector and the outer wall of the pipe body enclose a spiral flow passage, the upper end of the spiral flow passage is an exhaust end, and the lower end of the spiral flow passage is a drainage end and is used for connecting a drainage hole on a lower end cover of the filter element;

the top of the pipe body is provided with a flat-cylindrical connecting port used for connecting an upper end cover of a fuel filter, the bottom end of the connecting port is provided with an annular plate, the annular plate is provided with at least one air outlet, and the aperture of the air outlet is larger than or equal to 0.2 mm and smaller than or equal to 1.5 mm; the air outlet is communicated with the spiral flow passage downwards; the connecting port is used for being connected with an oil outlet structure of the fuel filter upwards.

The lower end of the pipe body is provided with a blocking structure or an opening; when the lower end of the pipe body is open, when the pipe body is installed in a filter element of the fuel filter, the lower end of the pipe body and the lower end cover of the filter element are welded or injected into a whole, and the lower end of the pipe body is closed by the lower end cover of the filter element to be open.

The filter screen structure, the spiral flow deflector, the connecting port and the upper half section and the lower half section of the pipe body are integrally molded.

The area of the filter screen structure is more than one tenth of the surface area of the pipe body.

The utility model discloses a same set of structure has solved the moisture in the separation fuel simultaneously and has decomposed the great bubble in the fuel into the problem of tiny bubble, compares and adopts two sets of structures to solve the problem of separating moisture respectively and decomposing the big bubble in the past, has reduced the volume of product, has saved the material cost. After the product volume reduces, can improve the installation flexibility of fuel filter in the limited motor vehicle inside in space, make fuel filter can adapt to the motor vehicle of more models. The fuel passes through the utility model discloses afterwards, separated moisture wherein, dissolved wherein big bubble to improve the quality to the engine fuel feeding. The utility model discloses each part is moulded plastics together, has realized the lightweight of product.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a schematic structural diagram of the present invention installed on a filter element of a fuel filter.

Detailed Description

As shown in fig. 1 to 3, the fuel filter center tube with water separation and air management functions of the present invention includes a tube body, a central hole 1 is provided in the tube body, the tube body includes an upper section 2 and a lower section 3 which are connected up and down, the lower section 3 of the tube body is provided with a filter screen structure 4, and the filter screen structure 4 is made of hydrophobic material; the outer wall of the pipe body is provided with a spiral flow deflector 5, the spiral flow deflector 5 and the outer wall of the pipe body enclose a spiral flow passage, the upper end of the spiral flow passage is an exhaust end, and the lower end of the spiral flow passage is a drainage end and is used for connecting a drainage hole 7 on a lower end cover 6 of the filter element; specifically, the filter screen structure 4 and the pipe body are both made of engineering plastics.

The top of the pipe body is provided with a flat-cylindrical connecting port 8 used for connecting an upper end cover of a fuel filter, the bottom end of the connecting port 8 is provided with an annular plate 9, the annular plate 9 is provided with at least one air outlet 10, and the aperture of the air outlet 10 is more than or equal to 0.2 mm and less than or equal to 1.5 mm;

the air outlet 10 is communicated with the spiral flow passage downwards; the connecting port 8 is communicated with the central hole 1; the connection port 8 is used for connecting with an oil outlet structure (such as an oil outlet) of the fuel filter upwards.

The lower end of the pipe body is provided with a blocking structure 11 (such as a plug or a bottom plate for blocking the pipe body) or is arranged in an opening way; when the lower end of the pipe body is open, when the pipe body is installed in a filter element of a fuel filter, the lower end of the pipe body and the lower end cover 6 of the filter element are welded or injected into a whole, and the lower end of the pipe body is closed by the lower end cover 6 of the filter element to be open. When the plugging structure 11 is arranged, the plugging structure 11 is provided with a through hole which is through up and down and used for water to pass through, and water separated from fuel oil flows out through the through hole and flows out through a drain hole on the filter element lower end cover 6. When the body lower extreme is uncovered, filter core lower end cover 6 is equivalent to plugging structure 11.

The filter screen structure 4, the spiral flow deflector 5, the connecting port 8 and the upper half section 2 and the lower half section 3 of the pipe body are integrally molded by injection. The area of the filter screen structure 4 is more than one tenth of the surface area of the pipe body.

The arrow 12 in fig. 3 indicates the direction of flow of the fuel entering the tubular body through the filtering layer 15 and the filtering screen structure 4 of the filter cartridge; the arrows denoted by reference numeral 13 in fig. 3 indicate the flow direction of the exhaust gas; the arrows 14 in fig. 3 indicate the flow direction of the drain water.

During the use, the utility model relates to a fire the center tube of oil cleaner's filter core, upwards weld or bond with filter core upper end cover, downwards weld or bond with filter core lower end cover 6. The filter layer 15 of the filter element is either in direct contact with the present invention or at a radial distance of less than 10 mm. After being filtered by the filter layer 15 of the filter element, the fuel enters the central hole 1 of the tube body through the filter screen structure 4 of the lower half section 3 of the tube body. The fuel coalesces to form larger droplets as it passes through the filter layer 15 of the filter element, and these droplets, when passing through the filter screen structure 4 having hydrophobic properties (the filter screen structure 4 is either made of hydrophobic material or coated with a hydrophobic coating), are intercepted by the filter screen structure 4 and are discharged along the spiral flow path down through the drainage holes 7 in the lower end cap 6 of the filter element. Meanwhile, the filter element works in a negative pressure environment, air separated out due to negative pressure in fuel oil passes through the spiral flow channel and the air outlet 10, is changed into fine bubbles and is slowly discharged into the connecting port 8 and enters the fuel oil, the phenomenon that a fuel cut-off part which only has the bubbles and does not have the fuel oil appears in an oil circuit due to the fact that the bubbles are too large is avoided, and accordingly flameout of an engine is avoided. The fuel oil passes through the utility model discloses, just guaranteed before the engine that flows to, separated moisture content wherein, dissolved big bubble wherein to improve the quality to the engine fuel feeding.

The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.

Claims

1. Fuel filter center tube with separation of water and air management function, including the body, have centre bore, its characterized in that in the body: the pipe body comprises an upper half section and a lower half section which are connected up and down, the lower half section of the pipe body is provided with a filter screen structure, and the filter screen structure is made of hydrophobic materials; the outer wall of the pipe body is provided with a spiral flow deflector, the spiral flow deflector and the outer wall of the pipe body enclose a spiral flow passage, the upper end of the spiral flow passage is an exhaust end, and the lower end of the spiral flow passage is a drainage end and is used for connecting a drainage hole on a lower end cover of the filter element;

2. The fuel filter center tube with water separation and air management function of claim 1 wherein: the lower end of the pipe body is provided with a blocking structure or an opening; when the lower end of the pipe body is open, when the pipe body is installed in a filter element of the fuel filter, the lower end of the pipe body and the lower end cover of the filter element are welded or injected into a whole, and the lower end of the pipe body is closed by the lower end cover of the filter element to be open.

3. The fuel filter center tube with water separation and air management function of claim 1 or 2 wherein: the filter screen structure, the spiral flow deflector, the connecting port and the upper half section and the lower half section of the pipe body are integrally molded.

4. The fuel filter center tube with water separation and air management function of claim 1 or 2 wherein: the area of the filter screen structure is more than one tenth of the surface area of the pipe body.