CN102258897B

CN102258897B - Filter filter

Info

Publication number: CN102258897B
Application number: CN2011101175090A
Authority: CN
Inventors: 邴丽荣; 孙桂芝
Original assignee: WAL FUEL SYETEMS (HEFEI) Ltd
Current assignee: Anhui Weil Low Carbon Technology Co., Ltd
Priority date: 2011-05-05
Filing date: 2011-05-05
Publication date: 2012-12-26
Anticipated expiration: 2031-05-05
Also published as: CN102258897A

Abstract

The invention provides a filter element component and a fuel filter comprising the filter element component. The filter element component provided by the invention comprises a filter tank and a filter element installed in the filter tank; and the filter element comprises multiple layers of polyhexamethylene adipamide (PA66) as a filtering material. The filter element component provided by the invention has the advantages of low production cost and high dust capacity by utilizing a layered structure of the PA66 to substitute filter paper. An upper cover plate component of the fuel filter provided by the invention comprises an upper cover plate formed by stamping, a fuel inlet pipe and a fuel outlet pipe; and the fuel inlet pipe and the fuel outlet pipe are welded on the upper cover plate. Thus, the upper cover plate component has a simple machining process and is easy to expand; and for example, the upper cover can be convenient to be provided with an overflow valve, a directional drainage device and the like.

Description

Fuel filter

Technical field

The present invention relates to a kind of element kit of depth-type filtration material and fuel filter that comprises this element kit of comprising.

Background technology

Diesel fuel filter is vital for the effect of engine, if there is not good diesel fuel filter, the function of engine will be affected and can not realize normal function.Fuel filter generally by the cleaner seat and with it spinning form with the element kit that is fastened.At present the diesel fuel filter filter core by filter paper as filtering material.Yet the cleaner that the domestic diesel engine that reaches state III and the above emission request of state III uses adopts import filter paper usually because of its performance requirement is high, thereby has increased production cost.In addition, because the restriction of material, the dust containing capacity of filter paper also is restricted.Very poor in Chinese market owing to oil product; And because the otherness of the different oil products in region is also very big; Caused cleaner short problem in service life, not only reduced the effect of vehicle protection but also increased user's financial burden, for being 60,000 kilometers with the replacing mileage of a cleaner in Europe; And change mileage in China is 1.5 ten thousand kilometers, only is 1/4 of external service life.

Some element kits also are provided with the float level sensor in the filter tank bottom, and discharging valve is installed on the sensor body.The effect of float level sensor is when water level reach a certain height, to realize break-make through magnetic signal, reports to the police, and in time discharges water to remind the driver.Yet the float level sensor that uses at present all adopts float and sensor together integrated, can't realize float is implanted in the filter tank for fuel-displaced young product.

In addition, the cleaner seat forms through die casting aluminium usually, then carries out suitable machined again.Such cleaner seat weight is big, and the high matching requirements of machining accuracy are high, thereby increases production cost.In addition, owing to oil-in, oil-out etc. and pedestal integrally casting form, be unfavorable for the expansion of auxiliary function.

The mode that discharges water of cleaner is normally in the vertical lower of filter tank at present, and manual work is opened discharging valve and made under the oil water mixture spontaneous current, can cause certain injury to the parts below it usually.If near part temperature is very high, then can cause serious consequence such as ignite.

Summary of the invention

One of the object of the invention just provides the low element kit of a kind of production cost, and this element kit comprises filter tank and the filter core that is contained in this filter tank, and this filter core comprises the multilayer polyhexamethylene adipamide.Replace filter paper can reduce cost with polyhexamethylene adipamide (claim nylon 66 again, be called for short PA66) as filtering material.Through hierarchy, the number of plies of PA66 layer is extremely many, is difficult for blockedly, and particle is adsorbed the back and just is difficult for breaking away from, and changes the filtration of the limited number of plies of filter paper in the past and not stratifiedly is prone to block each other and lost efficacy very soon.

In a preferred embodiment, the particle of said each layer of multilayer polyhexamethylene adipamide absorption different-grain diameter.PA66 layer of the present invention is divided into different levels to particles with different sizes and adsorbs; Become step-like distribution of particles trend, ground floor filters big particle, and last one deck filters little particle; And this material is even and crack, great cave can hold the particle of 4-8 times of weight of onesize papery filter core; Thereby improved the life-span of present cleaner greatly, reduced the replacing of cleaner, reduced cost and the most important thing is to have reduced environmental pollution.

In a preferred embodiment, this element kit also is included in the float level sensor that install the filter tank bottom, and this float level sensor comprises float assembly and the level sensor that separates with this float assembly.In the assembling process, float assembly is installed in the filter tank from the filter tank upper shed, and level sensor is passed float assembly from the dewatering outlet insertion of filter tank bottom.The advantage of this isolating construction is: the dewatering outlet need not to increase, and is less to the influence of filter tank static pressure, easy to assembly, good seal performance.

More preferably, this float assembly comprises the float shell, is positioned at the float of this float shell, is installed in the float cover on this float shell, and said float shell, float and float cover are provided with the centre bore that supplies this level sensor to pass.

On the other hand, the present invention provides a kind of production cost low fuel filter, and this fuel filter comprises above-mentioned element kit and fuel filter seat.

In a preferred embodiment, this fuel filter seat is made up of the upper cover plate assembly, and this upper cover plate assembly comprises the upper cover plate that punching press forms and is welded on oil inlet pipe and the flowline on the upper cover plate.Said upper cover plate production technology is simple, in light weight, and simple with being connected of other annexes, is suitable for expanding other functions.More preferably; Said upper cover plate assembly also comprises the fairing cap that is welded on said upper cover plate bottom; This fairing cap is tightly connected with the upper end cover of element kit and is communicated with the center cavity sealing of element kit, and this flowline is communicated with the oil pocket fluid that goes out that is formed by this fairing cap.Through using the fairing cap structure to realize the rational deployment of oil pipe.

In a preferred embodiment, this fuel filter comprises directed drainage arrangement, with the water directional stream-guidance, can not cause the damage of other parts.Preferably, this orientation drainage arrangement comprises: discharge valve seat is welded on the said upper cover plate; Discharging valve is installed on this discharge valve seat; And drainpipe, the one of which end is installed in the bottom of this discharge valve seat, and the other end leads to the filter tank bottom.

In a preferred embodiment, relief valve seat can be soldered to said upper cover plate, thereby can realize being connected with the simple of overflow valve.When the oil pressure in the cleaner surpassed certain threshold value, overflow valve was opened, and unnecessary fuel oil directly returns fuel tank from oil inlet pipe through overflow valve.

Description of drawings

With reference to the embodiment shown in the following accompanying drawing, will be more readily apparent from above-mentioned and other advantages of the present invention, in the accompanying drawings:

Fig. 1 is the stereogram of fuel filter of the present invention;

Fig. 2 is the profile of the fuel filter of Fig. 1;

The specific embodiment

Following examples only are exemplary, are not used for limiting protection scope of the present invention.Protection scope of the present invention is limited appended claim.Obviously, those skilled in the art can carry out multiple modification or replacement to embodiments of the invention, and does not break away from the spirit and scope of the present invention.

As shown in Figure 1, fuel filter of the present invention comprises upper cover plate assembly 1 and element kit 2.Oil inlet pipe 4 and flowline 5 that upper cover plate assembly 1 comprises the upper cover plate 3 that punching press forms and is soldered to this upper cover plate.Upper cover plate assembly 1 can also comprise the relief valve seat 6 and discharge valve seat 7 that is soldered to upper cover plate 3.The overflow valve (not shown) is installed on the relief valve seat 6, thereby when the oil pressure in the cleaner surpassed certain threshold value, overflow valve was opened, and unnecessary fuel oil directly returns fuel tank from oil inlet pipe through overflow valve.Discharging valve (being preferably check valve) 8 is installed on discharge valve seat 7, and in the bottom of discharge valve seat 7 drainpipe 9 is installed also, its free end stretches to the bottom (see figure 2) of filter tank.Drainpipe 9 must oil resistant, water-fast and high temperature resistant.Discharge valve seat 7, discharging valve 8 and drainpipe 9 have constituted directed drainage arrangement.When needs discharge water, the fluid reservoir that the electrodynamic pump (not shown) will upwards be discharged at the water of filter tank bottom automatically, thus avoid component contamination, serious consequence such as avoid igniting to the cleaner below.

As shown in Figure 2, element kit 2 comprises filter tank 10 and filter core 11.Can adopt the mode of hydraulic press to seal, perhaps the sealing machine crimping mode of sealing with filter tank 10 with upper cover plate 3 sealings install, latter's efficient is higher, static pressure can meet the demands.Filter core 11 is by central tube 12, upper end cover 13, bottom end cover 14 and through the material for core 15 of glue bond between said upper end cover and bottom end cover.This material for core is multilayer polyhexamethylene adipamide (PA66), thus, can make particle by layered filtration.Preferably, the particle of said each layer of multilayer polyhexamethylene adipamide absorption different-grain diameter.In embodiment shown in Figure 2, adsorbed particle grain size is descending to inner surface from the outer surface of filter core.According to the flow direction of fuel oil, in other embodiments, adsorbed particle grain size is ascending to inner surface from the outer surface of filter core.In addition,, during adsorption particle, be difficult for blockage phenomenon, and particle is adsorbed the back and just can break away from because material for core is multilayer PA66.

Support spring 16 is located between the bottom end cover 14 and filter tank of filter core, is used to support filter core.As shown in Figure 2, also be welded with fairing cap 17 in the lower end of upper cover plate 3, this fairing cap is tightly connected through the upper end cover 13 of O type circle 18 with element kit, and is communicated with the center cavity of element kit.Flowline 5 is communicated with the oil pocket fluid that goes out that fairing cap forms, thereby is communicated with the center cavity fluid of element kit.In addition, the draw-in

groove

19 and 20 that radially is respectively equipped with correspondence at upper end cover 13 and bottom end cover 14 is used for fixing drainpipe 9.Preferably, upper end cover and bottom end cover respectively are provided with four draw-in grooves.

As shown in Figure 2, in the bottom of filter tank 11 the float level sensor is installed also below bottom end cover 14, this float level sensor comprises float assembly and the level sensor (not shown) that separates with this float assembly.This float assembly comprises float shell 21, is positioned at the float 22 of this float shell, is installed in the float cover 23 on this float shell, and said float shell, float and float cover are provided with the centre bore that supplies this level sensor to pass.This level sensor can be tongue tube.Float 22 floats when the water in the filter tank reaches water level and requires, and the permanent magnet in the float 22 makes reed switch conduction send signal alarm, through to Signal Processing, isolated water through drainpipe 9 sucking-offs, is reached the effect that discharges water.In the assembling process, float assembly is installed in the filter tank from the filter tank upper shed, and level sensor is passed float assembly from dewatering outlet 24 insertions of filter tank bottom.

Be provided with through float assembly is separated with level sensor, can large-sized float be put into little filter tank, and realize accurate localization.Preferably, if adopt the screw thread of the connection of band tongue tube directly to assemble, for convenience detach.

Claims

1. fuel filter comprises:

The fuel filter seat, this fuel filter seat is made up of the upper cover plate assembly, and this upper cover plate assembly comprises the upper cover plate that punching press forms and is welded on oil inlet pipe and the flowline on the upper cover plate;

Element kit; This element kit comprises filter tank and the filter core that is contained in this filter tank; This filter core comprises the multilayer polyhexamethylene adipamide; The particle of said each layer of multilayer polyhexamethylene adipamide absorption different-grain diameter, this element kit also is included in the float level sensor that install the filter tank bottom, and this float level sensor comprises float assembly and the level sensor that separates with this float assembly; And

Directed drainage arrangement,

It is characterized in that this orientation drainage arrangement comprises: discharge valve seat is welded on the said upper cover plate; Discharging valve is installed on this discharge valve seat; And drainpipe, the one of which end is installed in the bottom of this discharge valve seat, and the other end leads to the filter tank bottom;

Said upper cover plate assembly also comprises the fairing cap that is welded on said upper cover plate bottom, and this fairing cap is tightly connected with the upper end cover of element kit and is communicated with the center cavity sealing of element kit, and this flowline is communicated with the oil pocket fluid that goes out that is formed by this fairing cap.

2. fuel filter according to claim 1 is characterized in that, this upper cover plate assembly also comprises the relief valve seat that is welded on said upper cover plate.

3. fuel filter according to claim 1; It is characterized in that; This float assembly comprises the float shell, is positioned at the float of this float shell, is installed in the float cover on this float shell, and said float shell, float and float cover are provided with the centre bore that supplies this level sensor to pass.