CN104088739B - A kind of fuel oil pressure-stabilizing valve of built-in filtration core - Google Patents

Abstract

The present invention relates to the fuel oil pressure-stabilizing valve of a kind of built-in filtration core, it is characterised in that described lower house is provided with the accommodation chamber that two ends communicate, be provided with pressure equaliser and lower house in accommodation chamber one end and be tightly connected formation closing cavity volume with upper shell；Filtration core it is provided with in cavity volume, it is provided with pressure relief device below accommodation chamber inner-pressure balancing unit, this pressure relief device one end communicates with oil inlet pipe, the other end is flexibly connected with the connecting tube being arranged on pressure equaliser, and the connecting tube other end communicates with oil suction chamber through pressure equaliser and is connected with pallet.Its effect is to arrange filtration core in the cavity volume between upper and lower casing, and pressure equaliser and pressure relief device are set in lower house, the most in use, not only can realize the balance of fuel pressure, ensureing the use requirement to fuel pressure of the automobile injection system, and, also fuel oil can be filtered, atomizer is impacted by the impurity that can be prevented effectively from oil product, it is ensured that the job stability of injection system.

Description

A kind of fuel oil pressure-stabilizing valve of built-in filtration core

Technical field

The present invention relates to a kind of fuel oil pressure-stabilizing device, a kind of built-in filtration The fuel oil pressure-stabilizing valve of core, is mainly used in the oil supply system of automobile engine.

Background technology

Existing fuel oil stabilizer primarily serves a fuel pressure balanced action, i.e. fuel pump will Fuel oil utilizes fuel oil stabilizer to be adjusted the fuel pressure in oil inlet pipe after delivering to oil inlet pipe, When oil inlet pipe fuel pressure exceedes setting value, fuel oil stabilizer automatically turns on and makes fuel oil pass through Carry out release in manostat discharge line, thus ensure that the pressure of vehicle fuel pipeline is in all the time In setting value, it is ensured that the job stability of automobile fuel injection system, and it is basic to fire oil filtration On be all individually on fuel oil pump assembly, to be integrated with cleaner, by cleaner, fuel oil was carried out Filter, and need in use for some time due to cleaner to change, thus need whole combustion Oil pump assy is changed, and the use cost of vehicle is higher；And due to the property of existing fuel oil stabilizer Can be single, do not possess fuel filter effect.

Summary of the invention

Single in order to solve existing fuel oil stabilizer performance, do not possess the skills such as fuel filter effect Art problem, the present invention provides the fuel oil pressure-stabilizing valve of a kind of built-in filtration core, and this manostat not only has Standby fuel pressure equilibrium function, but also the fuel oil entering electromotor can be filtered, it is achieved Fuel filter effect, and its simple in construction, it is easy to change, the use of vehicle can be reduced greatly Cost.

For solving above technical problem, the present invention adopts the technical scheme that a kind of built-in filtration core Fuel oil pressure-stabilizing valve, including the upper shell and the lower house that are provided with flowline；On described lower house It is provided with the accommodation chamber that two ends communicate, is provided with the pipe of band oil drain out and oil inlet pipe in accommodation chamber one end Head, the other end is provided with pressure equaliser and lower house and is tightly connected formation closing appearance with upper shell Chamber；Being provided with pallet in cavity volume, the external diameter of this pallet is less than the internal diameter of cavity volume, and on pallet It is provided with filtration core, filtration core ring-shaped section and ring-shaped and its one end to fit with upper shell inner face, separately One end and pallet end face fit in making cavity volume and form relatively independent oil suction chamber and go out oil pocket；? It is provided with pressure relief device, this pressure relief device one end and oil inlet pipe below accommodation chamber inner-pressure balancing unit Being connected, the other end is flexibly connected with the connecting tube being arranged on pressure equaliser, connecting tube The other end communicates with oil suction chamber with pallet through pressure equaliser and is connected with pallet；Described Flowline with go out oil pocket and communicate and pressure equaliser is arranged on fuel-displaced intracavity and when fuel oil mistake Pressure relief device can be driven during pressure to open makes fuel oil discharge through floss hole.

Further, described pressure equaliser includes and is fixed on accommodation chamber port and seals The diaphragm of cavity volume, described connecting tube one end connects and and oil suction chamber through diaphragm and pallet Communicating, the other end is flexibly connected with pressure relief device in being placed in accommodation chamber；It is provided with below diaphragm Balancing spring, this balancing spring one end compresses mutually with diaphragm, the other end and the bottom of accommodation chamber Compress mutually；Described diaphragm can overcome balancing spring elastic force to order about to unload and press-fit when fuel oil overvoltage Put unlatching.

Further, include diaphragm body, seal receptacle and stator at described diaphragm, Seal receptacle is arranged on the port of lower house accommodation chamber and is tightly connected with lower house, at seal receptacle It is provided with draw-in groove, in edge, diaphragm body surrounding is placed in draw-in groove and by stator and seal receptacle It is tightly connected, stator is provided with the first through hole and pressure relief vent, set at the first through hole edge Fluted, described connecting tube one end is connected also through diaphragm body and the first through hole with pallet Communicate with oil suction chamber, in the groove of stator, be provided with the first pad and packing ring, described pallet Being placed on packing ring and stator interval is arranged, pressure relief vent connects out oil pocket and diaphragm body.

Further, the both ends of the surface of described diaphragm body are equipped with band through hole respectively Upper and lower stiffening piece and being bolted to connection；Described lower stiffening piece is provided with and unloads belling Platform, this release boss can open pressure relief device when diaphragm body deformation.

Further, described pressure relief device includes oil guide pipe, this oil guide pipe one end and oil inlet pipe Being connected, the other end is placed in connecting tube and external diameter is less than between connecting tube internal diameter and connecting tube inwall Gap coordinates；Being arranged with release sleeve pipe outside oil guide pipe, the end of this release sleeve pipe is placed in lower reinforcing The connecting tube mouth of pipe also can be closed under the driving of back lash spring in the underface of the release boss of sheet First operating position and when fuel oil overvoltage diaphragm ontology-driven its make oil guide pipe to bottom offset The second operating position that the mouth of pipe is communicated with accommodation chamber by release sleeve pipe；Back lash spring one end with unload Gland pipe compresses mutually, and the other end compresses mutually with tube head.

Further, described release sleeve pipe includes sleeve body, sets in one end of sleeve body Having the base of spherical groove, this base can be nested with outside connecting tube under the effect of back lash spring And its upper surface is placed in the underface of release boss, in the ball recess of base, it is provided with hemispherical Plug, this plug is nested with outside oil guide pipe, and have back lash spring drive base make its with even Connection pipe opening end face fit seal the first operating position and order about barrier film when fuel oil overvoltage Sheet body deformation makes release boss drive base make itself and connecting tube mouth of pipe end face phase to bottom offset The second operating position separated.

Further, the end face of described plug is provided with the second pad, this second pad and company The end face of adapter fits and seals and be set in the outer outside with oil guide pipe of oil guide pipe and fit mutually.

Further, described connecting tube includes tube body and position-limiting tube, and tube body passes barrier film Sheet body is connected with pallet and cannelure is arranged on tube body lateral wall, and the internal diameter of position-limiting tube is big In the internal diameter of tube body makes position-limiting tube, form limited step, be provided with limit in the port of oil guide pipe Position ring, the external diameter of this spacing ring and position-limiting tube internal diameter match and at least provided with three on spacing ring Individual oil extraction groove；Described position-limiting tube outer wall is provided with annular chuck, diaphragm body clamping In cannelure and utilize stator and annular chuck be tightly connected with connecting tube.

Further, the inwall of described sleeve body is provided with suitable with oil guide pipe outer wall Guiding rib, this guiding rib is structure as a whole with sleeve body.

Further, described plug is provided with trepanning, is provided with in trepanning and oil guide pipe outer wall The second guiding rib matched, this second guiding rib is structure as a whole with plug.

The invention has the beneficial effects as follows in the cavity volume between upper and lower casing and filtration core is set, and Pressure equaliser and pressure relief device are set in lower house, the most in use, not only The balance of fuel pressure can be realized, it is ensured that the use requirement to fuel pressure of the automobile injection system, And, also fuel oil can be filtered, atomizer is caused by the impurity that can be prevented effectively from oil product Impact, it is ensured that the job stability of injection system.

Accompanying drawing explanation

Fig. 1 is the sectional structure of the fuel oil pressure-stabilizing valve of a kind of built-in filtration core of the embodiment of the present invention Figure

Fig. 2 is the three-dimensional structure diagram of lower house in the embodiment of the present invention

Fig. 3 is the three-dimensional structure diagram of stator in the embodiment of the present invention

Fig. 4 is the three-dimensional structure diagram of lower stiffening piece in the embodiment of the present invention

Fig. 5 is the three-dimensional structure diagram of seal receptacle in the embodiment of the present invention

Fig. 6 is the three-dimensional structure diagram of connecting tube in the embodiment of the present invention

Fig. 7 is the side perspective structure chart of connecting tube in the embodiment of the present invention

Fig. 8 is the three-dimensional structure diagram of oil guide pipe in the embodiment of the present invention

Fig. 9 is the three-dimensional structure diagram of plug in the embodiment of the present invention

Figure 10 is the three-dimensional structure diagram of release sleeve pipe in the embodiment of the present invention

Figure 11 is the side perspective structure chart of release sleeve pipe in the embodiment of the present invention

Figure 12 is the three-dimensional structure diagram of tube head in the embodiment of the present invention

Figure 13 is the stereochemical structure of the fuel oil pressure-stabilizing valve of a kind of built-in filtration core of the embodiment of the present invention Figure

In figure: 1. upper shell, 11. flowlines, 2. lower house, 21. accommodation chambers, 22. tube heads, 221. oil drain outs, 222. oil inlet pipes, 3. pressure equaliser, 31. diaphragms, 311. diaphragms Body, 312. seal receptacles, 3121. draw-in grooves, 313. stators, 3131. first through holes, 3132. Pressure relief vent, 3133 grooves, 3134. first pads, 3135. packing rings, 32. balancing springs, 33. Upper stiffening piece, 34. times stiffening pieces, 341. release boss, 4. cavity volume, 41. oil suction chambers, 42. go out Oil pocket, 5. pallet, 6. filtration core, 7. pressure relief device, 71. oil guide pipes, 711. spacing rings, 712. Oil extraction groove, 72. release sleeve pipes, 721, sleeve body, 7211. guiding ribs, 722. bases, 7221. ball recess, 723. plugs, 7231. trepannings, 7232. second guiding ribs, 724. second Pad, 73. back lash springs, 8. connecting tube, 81. tube bodies, 811. cannelures, 82. position-limiting tubes, 821. limited steps, 822. annular chuck

Detailed description of the invention

Below in conjunction with the accompanying drawings embodiment of the present invention is described further:

As shown in figures 1-13, the present invention is the fuel oil pressure-stabilizing valve of a kind of built-in filtration core, including It is provided with upper shell 1 and the lower house 2 of flowline 11；Described lower house 2 is provided with two ends The accommodation chamber 21 communicated, is provided with band oil drain out 221 and oil inlet pipe 222 in accommodation chamber 21 one end Tube head 22, the other end is provided with pressure equaliser 3 and lower house 2 seals with upper shell 1 Connect to be formed and close cavity volume 4；Being provided with pallet 5 in cavity volume 4, the external diameter of this pallet 5 is less than The internal diameter of cavity volume 4, and be provided with filtration core 6 on pallet 5, filtration core 6 ring-shaped section and ring-shaped and Its one end fits with upper shell 1 inner face, and the other end and pallet 5 end face fit and make cavity volume Form relatively independent oil suction chamber 41 in 4 and go out oil pocket 42；Pressure balance in accommodation chamber 21 Being provided with pressure relief device 7 below device 3, this pressure relief device 7 one end is connected with oil inlet pipe 222, The other end is flexibly connected with the connecting tube 8 being arranged on pressure equaliser 3, and connecting tube 8 is another One end communicates with oil suction chamber 41 with pallet 5 through pressure equaliser 3 and is connected with pallet 5 Connect；Described flowline 11 with go out oil pocket 42 and communicate and pressure equaliser 3 is arranged on fuel-displaced Pressure relief device 7 in chamber 42 and can be driven to open when fuel oil overvoltage make fuel oil through floss hole 221 Discharge.In cavity volume 4, add pallet 5, and utilize pallet 5 and annular filter core 6 (filtration core For filter paper, for existing conventional products, the present embodiment is not further qualified) by cavity volume 4 one points It is the relatively independent oil suction chamber of two formation two 41 and goes out oil pocket 42, thus can ensure that vapour All the time it is in car oil spout pipeline under the pressure of setting, it is simple to automobile possesses enough after flame-out Fuel pressure starts automobile；And when fuel pressure overvoltage in oil spout pipeline, go out oil pocket Fuel oil in 42 just can strut pressure equaliser 3 and drive its unlatching pressure relief device 7 to put Oil release；And if be not provided with pallet 5, it is impossible to cavity volume 4 is divided into two relatively independent Oil suction chamber 41 and go out oil pocket 42, so (is subject to when the fuel pressure in oil suction chamber 41 is excessive The obstruct of filtration core 6, now fuel oil major part also enters out in oil pocket 42 without filter element 6, Go out the fuel oil in oil pocket 42 and be also not up to fuel pressure demands), can directly strut pressure balance dress Put 3, cause the pressure relief device 7 just started during the non-overvoltage of the fuel pressure in oil spout pipeline to be drained the oil, Thus affect the service behaviour of injection system, therefore, cavity volume 4 adds pallet 5, be to protect The necessary means of card fuel pressure demands.In accommodation chamber 21 port of lower house 2, pressure is set Thrust balancing device 3 makes to be formed between upper and lower casing 1,2 sealed volume 4, and at cavity volume 4 In add pallet 5 and on pallet 5 install annular filtration core 6, in thus can making cavity volume 4 Form two relatively independent oil suction chambers 41 and go out oil pocket 42, fuel oil through fuel pump deliver to into After in oil pocket 41, enter out oil pocket 42, the most again through flowline 41 through the filtration of filtration core 6 To injection system fuel feeding, such present invention achieves that combustion oil filtration, it is to avoid in oil product Atomizer is resulted in blockage by impurity, it is ensured that the job stability of injection system；And if when fuel-displaced The fuel oil in chamber 42 is too much, and when causing oil spout pipeline fuel pressure excessive, fuel oil just can drive Pressure equaliser 3 deforms so that it is driving pressure relief device 7 to open, such fuel oil is through oil-feed When pipe 222 enters oil suction chamber 41, can be discharged to house by the fuel oil of overvoltage through pressure relief device 7 In room 21, after be back in automotive oil tank through oil drain out 221, it is achieved fuel pressure flat Weighing apparatus；Use this structure, not only can realize being automatically adjusted of fuel pressure, it is ensured that automobile oil spout The system use requirement to fuel pressure, and, also fuel oil can be filtered, can effectively keep away Atomizer is impacted by the impurity exempted from oil product, it is ensured that the job stability of injection system.

In the present embodiment, in order to ensure the fuel pressure in oil spout pipeline, described pressure is put down Weighing apparatus device 3 includes the diaphragm 31 being fixed on accommodation chamber 21 port sealed volume 4, Described connecting tube 8 one end connects through diaphragm 31 and pallet 5 and communicates with oil suction chamber 41, The other end is flexibly connected with pressure relief device 7 in being placed in accommodation chamber 21；Set below diaphragm 31 Having balancing spring 32, this balancing spring 32 one end compresses with diaphragm 31 phase, the other end with The bottom of accommodation chamber 21 compresses mutually；Described diaphragm 31 can overcome balance when fuel oil overvoltage Spring 32 elastic force orders about pressure relief device 7 and opens；Set in accommodation chamber 21 port of lower house 2 Put diaphragm 31, and utilize diaphragm 31 to carry out close to accommodation chamber 21 port of lower house 2 Envelope, so that forming sealed volume 4, so when fuel oil is through even between upper and lower casing 1,2 Adapter 8 enters after oil suction chamber 41, then enters out oil pocket 42 through the filtration of filtration core 6, if When the fuel pressure going out oil pocket 42 exceedes setting value, fuel oil just can drive diaphragm 31 to overcome The elastic force of balancing spring 32 makes diaphragm 31 be bent downwardly deformation, thus backs down pressure relief device 7, Entrance oil suction chamber 41 and the fuel oil gone out in oil pocket 42 is made to return to oil suction chamber reverses through filter element 6 Emit through pressure relief device 7 in 41, it is ensured that go out oil pocket 42 and oil spout pipeline fuel pressure All the time it is in setting value；And when fuel oil is after pressure relief device 7 emits, go out oil pocket 42 When reaching in setting value with the fuel pressure in oil spout pipeline, the pressure that diaphragm 31 bears is just Can reduce accordingly, now, balancing spring 32 will push up pressure diaphragm 31 and reset, and makes to unload and press-fits Put 7 closedowns, thus ensure the balance of fuel pressure；Certainly, from the point of view of fuel oil pressure-stabilizing angle, Also can not use diaphragm 31 structure, such as arrange in the port of lower house 2 accommodation chamber 21 Piston, utilizes balancing spring 32 that piston is blocked in accommodation chamber 21 port, can reach equally Identical purpose, but use piston structure can cause the pressure that moment will go out in oil pocket and oil spout pipeline Power fall causes below setting value, affects the job stability of injection system, and therefore, the present embodiment is Preferred implementation.

In the present embodiment, in order to ensure the pressure of fuel oil and be easy to the installation of diaphragm 31, Described diaphragm 31 includes diaphragm body 311, seal receptacle 312 and stator 313, Seal receptacle 312 is arranged on the port of lower house 2 accommodation chamber 21 and seals even with lower house 2 Connecing, be provided with draw-in groove 3121 on seal receptacle 312, diaphragm body 311 surrounding is along being placed in It is tightly connected with seal receptacle 312, at stator 313 in draw-in groove 3121 and by stator 313 Be provided with the first through hole 3131 and pressure relief vent 3132, be provided with at the first through hole 3131 edge Groove 3133, described connecting tube 8 one end passes diaphragm body 311 and the first through hole 3131 Be connected with pallet 5 and and oil suction chamber 41 communicate, be provided with in the groove 3133 of stator 313 First pad 3134 and packing ring 3135, described pallet 5 is placed on packing ring 3135 with fixing Sheet 313 interval is arranged, and pressure relief vent 3132 connects out oil pocket 42 and diaphragm body 311；Logical Cross and seal receptacle 312 and stator 313 are set, and utilize stator 313 by diaphragm body 311 It is fixed in seal receptacle 312, is so easy to production and the installation of diaphragm 31, when mounted First diaphragm body 311 is placed in the draw-in groove 3121 of seal receptacle 312, then by stator 313 Snap in and draw-in groove 3121 makes diaphragm body 311 fix with seal receptacle 312, seal receptacle 312 The cross section of cross section and accommodation chamber 21 port match, the most again seal receptacle 312 is placed on Accommodation chamber 21 port of lower house 2 by accommodation chamber 21 close make upper and lower casing 1,2 it Between form the cavity volume 4 of sealing；Certainly, for the requirement used, it is possible to directly by diaphragm Body 311 makes it fix with lower house 2 by bolt or clasp, can realize identical equally Function, reaches identical purpose, but uses this structure, can greatly facilitate production and processing and Installing, therefore, the embodiment of the present embodiment is preferred implementation；And at stator 313 On the first through hole 3131 is set, be primarily to facilitate the combustion easy to connect of connecting tube 8 and pallet 5 Oil enters in oil suction chamber 41；And groove 3133 is set, and add first in groove 3133 Pad 3134 and packing ring 3135, such pallet 5 just can and stator 313 interval arrange, make Presses against diaphragm sheet body 311 can be removed by pressure relief vent 3132 when going out the fuel oil overvoltage in oil pocket 42 Flexural deformation, thus drive pressure relief device 7 to open and carry out fuel emission release, it is ensured that oil spout The stability of pipeline fuel pressure, improves the job stability of injection system；And in order to ensure The interval of pallet 5 and stator 313 is installed, it is possible to arrange multiple fixing on stator 313 Support, fixes and pallet and stator interval can be made to arrange, but use this structure, it is also possible to profit Carry out reverse extrusion pallet 5 with the fuel pressure in oil suction chamber 41, make pallet 5 play a power Transmission effect extrude stator 313, make diaphragm body 311 and the joint of connecting tube 8 Place and diaphragm body 311 seal more firm with the joint of draw-in groove 3121, it is ensured that seal Performance.

In the present embodiment, can drive when compressive deformation for the ease of diaphragm body 311 and unload Pressure device 7 is opened and is carried out fuel oil pressure relief blow, in the both ends of the surface of described diaphragm body 311 The upper upper and lower stiffening piece 33,34 being equipped with band through hole respectively and being bolted to connection； Described lower stiffening piece 34 is provided with release boss 341, this release boss 341 can every Top pressure pressure relief device 7, balancing spring 32 one end and lower stiffening piece 34 during diaphragm body 311 deformation Compress mutually；By arranging upper and lower reinforcing in the both ends of the surface up and down of diaphragm body 311 simultaneously Sheet 33,34, and release boss 341 is set on lower stiffening piece 34, so when going out oil pocket 42 In fuel oil overvoltage time, fuel oil enter pressure relief vent 3132 presses against diaphragm sheet body 311 make its to Lower flexural deformation, now, release boss 341 just can order about pressure relief device 7 and open, and makes connection Fuel oil reverse reflux is discharged to oil suction chamber 41 is interior through pressure relief device 7 in pipe 8 and in going out oil pocket 42 Discharge through oil drain out 221 in accommodation chamber 21, it is achieved the pressure balance of fuel oil；Certainly also may be used Lower stiffening piece 34 is only set, lower stiffening piece 34 is fixedly connected with diaphragm body 311, Also can realize diaphragm body 311 and drive the function of pressure relief device 7, but due to diaphragm 31 Make for elastomeric material, be unfavorable for the fixed installation of lower stiffening piece 34, therefore, at diaphragm Add upper and lower stiffening piece 33,34 in the both ends of the surface up and down of body 311 simultaneously, add under convenience Stator 34 be installed as preferred implementation.

In the present embodiment, for the ease of carrying out release when fuel oil overvoltage, it is ensured that fuel pressure Stability, described pressure relief device 7 includes oil guide pipe 71, this oil guide pipe 71 one end with Oil inlet pipe 222 is connected, in the other end is placed in connecting tube 8 and external diameter is less than connecting tube 8 internal diameter With connecting tube 8 inwall matched in clearance；Being arranged with release sleeve pipe 72 outside oil guide pipe 71, this unloads The end of gland pipe 72 is placed in the underface of the release boss 341 of lower stiffening piece 34 and can unload The first operating position of connecting tube 8 mouth of pipe is closed and in fuel oil overvoltage under the driving of pressing spring 73 Time diaphragm body 311 drive it to make oil guide pipe 71 mouth of pipe by release sleeve pipe 72 to bottom offset The second operating position communicated with accommodation chamber 21；Back lash spring 73 one end and release sleeve pipe 72 Compressing mutually, the other end compresses with tube head 22 phase；Set between oil inlet pipe 222 and connecting tube 8 Putting oil guide pipe 71, and make oil guide pipe 71 one end be connected with oil inlet pipe 222, the other end inserts Make in connecting tube 8 to be formed between itself and connecting tube 8 to unload oil-gap, and for preventing fuel pressure not Reach fuel oil during setting value to leak, at oil guide pipe through the joint of connecting tube 8 and oil guide pipe 71 71 be externally provided with can be along oil guide pipe about 71 sliding and seal with oil guide pipe 71 and coordinate that (sealing is joined Conjunction refer to release sleeve pipe 72 with outside oil guide pipe 71 between formed movable sealing is connected, pipeline move Be sealed into prior art, here, be not described in detail) release sleeve pipe 72, then utilize The elastic force of back lash spring 73 orders about the mouth of pipe of release sleeve pipe 72 displacement closure connecting tube 8, real The fuel sealing (this state is the first operating position) of existing connecting tube 8, it is ensured that fuel pressure Use and require and the demand of fuel oil；And if when fuel pressure overvoltage, in oil suction chamber 42 Fuel oil will enter presses against diaphragm sheet body 311 in pressure relief vent 3132, make diaphragm body 311 and lower stiffening piece 34 synchronize to bottom offset, now, release boss 341 just can push up pressure and unload The end of gland pipe 72 makes it overcome the elastic force of back lash spring 73, and to bottom offset, (this state is Two operating positions), between the fuel oil of such overvoltage just can be between oil guide pipe 71 and connecting tube 8 Gap is discharged in accommodation chamber 21, then is back in fuel tank through oil drain out 221, it is achieved fuel oil pressure The Automatic Balance Regulation of power；Certainly, for using requirement, it is possible to do not use this structure, Such as directly outage is set on the sidewall of connecting tube 8, utilize release sleeve pipe 72 and connect The lateral wall movable sealing of adapter 8 coordinates, and is fixed on diaphragm body 311 times when fuel oil overvoltage The release boss 341 of the lower stiffening piece 34 of side drives release sleeve pipe 72 to make outage to bottom offset Communicating with accommodation chamber 21, such fuel oil just can the direct outage from connecting tube 8 lateral wall Discharge, it is ensured that the balance of fuel pressure, but owing to this sealing structure is unstable, therefore, The embodiment using the present embodiment is preferred implementation.

In the present embodiment, for the ease of release and the closure connecting tube 8 and oil guide pipe of fuel oil Gap between 71, described release sleeve pipe 72 includes sleeve body 721, at sleeve pipe originally One end of body 721 is provided with the base 722 of spherical groove 7221, and this base 722 is in release Can be nested with under the effect of spring 73 outside connecting tube 8 and its upper surface is placed in release boss 341 Underface, in the ball recess 7221 of base 722, be provided with hemispherical plug 723, should Plug 723 is nested with outside oil guide pipe 71, and has and drive base 722 to make at back lash spring 73 Its first operating position sealed and when fuel oil overvoltage of fitting with connecting tube 8 mouth of pipe end face Ordering about diaphragm body 311 deformation makes release boss 341 drive base 722 to make it to bottom offset The second operating position being separated with connecting tube 8 mouth of pipe end face；Release sleeve pipe 72 is set to set Tube body 721 and base 722 two parts, during use, utilize base 722 and lower reinforcing Sheet 34 release boss 341 matches, and is so easy to diaphragm body 311 and becomes at bend by pressure Pressure relief device 7 is opened during shape；And hemispherical plug 723 is set in ball recess 7221, profit Base 722 is driven to make it fit with the mouth of pipe end face of connecting tube 8 with back lash spring 73 (this state is the first of plug to the oil-gap that unloads of sealed joint pipe 8 and oil guide pipe 71 joint Operating position), it is ensured that the pressure stability of fuel oil and the conveying capacity of fuel oil, improve injection system Job stability；And when fuel pressure overvoltage, fuel oil presses against diaphragm sheet body 311 is turned under Bent deformation utilizes the release boss 341 of lower stiffening piece 34 to drive base 722 to overcome release bullet The elastic force of spring 73 is to bottom offset, and now, plug 723 loses the support of base 722, connects Fuel oil in pipe 8 just can back down plug 723 makes fuel oil between connecting tube 8 and oil guide pipe 71 The outer oil drain out 221 on tube head 22 of oil-gap discharge pipe seat 722 that unloads be back in fuel tank, Realize the Automatic Balance Regulation of fuel pressure.

In the present embodiment, in order to prevent fuel oil through connecting tube 8 and the joint of oil guide pipe 71 Leakage, is provided with the second pad 724, this second pad 724 on the end face of described plug 723 Fit with the end face of connecting tube 8 and seal and be set in outside oil guide pipe 71 and outside oil guide pipe 71 Suitable mutually, side；Plug 723 adds the second pad 724, and utilize the second pad 724 with The mouth of pipe end face of connecting tube 8 fits, and is so prevented from connecting tube 8 and oil guide pipe 71 Joint leaks, and affects the pressure stability of fuel oil；Secondly, the second pad 724 is nested with Outer at oil guide pipe 71 and make the formation that fits of itself and oil guide pipe 71 outer wall seal, thus can prevent Only fuel leakage, it is ensured that the pressure stability of fuel oil；When fuel pressure overvoltage, diaphragm body 311 flexural deformations are ordered about lower stator 34 and are pushed up pressure pipe seat 722 and overcome the elastic force of back lash spring 73 To bottom offset, now, the fuel oil in connecting tube 8 just can drive the second pad 724 along oil guide pipe 71 to bottom offset, and such fuel oil just can be discharged through the joint of connecting tube 8 and oil guide pipe 71, Realize the Automatic Balance Regulation of fuel oil；And when fuel pressure is less than setting pressure, back lash spring 73 just can push up pressure pipe seat 722 shifts up, and base 722 just can drive plug 723 and second Pad 724 blocks the mouth of pipe end face of connecting tube 8, it is achieved the sealing of connecting tube 8.

In the present embodiment, for ease of connecting tube 8 and the sealing of diaphragm body 311 joint Performance, described connecting tube 8 includes tube body 81 and position-limiting tube 82, and tube body 81 is worn Cross diaphragm body 311 to be connected with pallet 5 and cannelure 811 is arranged on outside tube body 81 On wall, the internal diameter of position-limiting tube 82 forms limit in making position-limiting tube 82 more than the internal diameter of tube body 81 Position step 821, is provided with spacing ring 711 in the port of oil guide pipe 71, this spacing ring 711 External diameter matches with position-limiting tube 82 internal diameter and recessed at least provided with three oil extractions on spacing ring 711 Groove 712；Described position-limiting tube 82 outer wall is provided with annular chuck 822, diaphragm body In 311 are connected to cannelure 811 and utilize stator 313 and annular chuck 822 and connecting tube 8 are tightly connected；The lateral wall of tube body 81 is provided with cannelure 811, when tube body 81 During through diaphragm body 311, the edge, hole at diaphragm body 311 center just can snap in annular In groove 811, it is ensured that tube body 81 and the degree of being connected firmly of diaphragm body 311；And in limit Annular chuck 822 is set on the pipe 82 of position, and makes diaphragm body 311 be in annular chuck 822 With between stator 313, in running, the fuel oil in oil suction chamber 41 just can be the most right Pallet 5 applies certain pressure, and extruding force just can be passed to stator 313 by pallet 5, Make stator 313 and annular chuck 822 presses against diaphragm sheet body 311, it is ensured that diaphragm body The degree of firmly installing of 311；And the internal diameter of position-limiting tube 82 is set greater than in tube body 81 Footpath forms limited step 821 in making position-limiting tube 82, so with the port being arranged on oil guide pipe 71 Place's spacing ring 711 just can form spacing cooperation, can effectively prevent when back lash spring 73 resets Impact oil guide pipe 71 causes oil guide pipe 71 installation site generation over-travel sealing orifice, impact The pressure relief performance of fuel pressure overvoltage；And arrange and position-limiting tube 82 internal diameter phase on oil guide pipe 71 The spacing ring 711 of coupling, and oil extraction groove 712 is set on spacing ring 711, when unloading gland After pipe 72 is backed down by the release boss 341 of lower stiffening piece 34, fuel oil just can be through oil extraction groove 712 are discharged in accommodation chamber 21, are then back in fuel tank through oil drain out 221.

In the present embodiment, the inwall of described sleeve body 721 is provided with and oil guide pipe The guiding rib 7211 that 71 outer walls are suitable, this guiding rib 7211 is integrated with sleeve body 721 Structure, adds guiding rib 7211, can be easy to sleeve body 721 along oil guide pipe 71 axially downwardly Displacement, it is to avoid swing in downward displacement process, affects release sleeve pipe 72 and is tightly connected The sealing property of pipe 8.

In the present embodiment, described plug 723 is provided with trepanning 7231, at trepanning 7231 Inside it is provided with the second guiding rib 7232 matched with oil guide pipe 71 outer wall, this second guiding rib 7232 are structure as a whole with plug 723；Add the second guiding rib 7232 stifled also for ensureing 723 can be along oil guide pipe 71 displacement vertically downward, it is to avoid it swings when to bottom offset, Affect sealing property and the reset of connecting tube 8 mouth of pipe.

The working method of the present invention is: be connected with oil inlet pipe 222 by fuel pump, flowline 11 Be connected with injection system pipeline, start fuel pump, fuel oil through oil inlet pipe 222, oil guide pipe 71, Connecting tube 8 enters in oil suction chamber 41, (realizes the fuel oil of the present invention through the filtration of filtration core 6 Filtering function), fuel oil enters out in oil pocket 42 and through flowline 11 to injection system fuel feeding, Fuel oil conveying capacity due to fuel pump is more than the fuel consumption of injection system, after running a period of time, Oil suction chamber 41 and the fuel pressure gone out in oil pocket 42 will exceed setting value, now, go out oil pocket Fuel oil in 42 is through pressure relief vent 3132 presses against diaphragm sheet body 311 and overcomes balancing spring 32 Elastic force, make diaphragm body 311 be bent downwardly deformation, meanwhile, be arranged on diaphragm body Lower stiffening piece 34 below 311 synchronize to bottom offset and push up pressure release sleeve pipe 72 make release sleeve pipe 72 overcome the elastic force of back lash spring 73 to bottom offset, and now, plug 723 loses support force, Synchronize along oil guide pipe 71 slide downward, and the fuel oil in oil guide pipe 71 and connecting tube 8 just can push up Opening the second pad 724 makes the second pad 724 along oil guide pipe 71 to bottom offset, so, fuel-displaced Fuel oil in chamber 42 and oil suction chamber 41 will reverse reflux at connecting tube 8 through oil extraction groove 712 are discharged in accommodation chamber 21, are back to by the oil drain out 221 on tube head 22 the most again In fuel tank, it is achieved (fuel pressure realizing the present invention is automatic for the Automatic Balance Regulation of fuel pressure Regulatory function)；And when the fuel pressure gone out in oil pocket 42 is less than setting value, diaphragm body 311 extruding forces born will be less than the elastic force of balancing spring 32, and such balancing spring 32 is just Lower reinforcing stator 34 and diaphragm body 311 can be driven to reset, and now, release sleeve pipe 72 loses Go downward pressure on top surface, back lash spring 73 that release sleeve pipe 72 will be driven to reset, utilize plug 723 and second pad 724 block connecting tube 8 mouth of pipe and just can stop that fuel emission makes fuel oil enter Through filtering the fuel-displaced chamber of arrival 42 to injection system fuel feeding after oil suction chamber 41；Press when going out oil pocket 42 When power is again above setting value, repeats above step and realize fuel pressure Automatic Balance Regulation.

Above-described embodiment is not construed as limitation of the present invention, but any spirit based on the present invention Improvements introduced, all should be within protection scope of the present invention.

Claims (10)

1. a fuel oil pressure-stabilizing valve for built-in filtration core, including be provided with flowline upper shell and Lower house；It is characterized in that described lower house is provided with the accommodation chamber that two ends communicate, accommodating One end, room is provided with the tube head of band oil drain out and oil inlet pipe, the other end be provided with pressure equaliser and under Housing and upper shell are tightly connected formation and close cavity volume；Pallet it is provided with in cavity volume, this pallet External diameter is less than the internal diameter of cavity volume, and is provided with filtration core on pallet, filtration core ring-shaped section and ring-shaped and Its one end fits with upper shell inner face, and the other end and pallet end face fit and make shape in cavity volume Become relatively independent oil suction chamber and go out oil pocket；It is provided with below accommodation chamber inner-pressure balancing unit and unloads Pressure device, this pressure relief device one end is connected with oil inlet pipe, the other end be arranged on pressure balance Connecting tube on device is flexibly connected, the connecting tube other end through pressure equaliser and pallet with Oil suction chamber communicates and is connected with pallet；Described flowline communicates and pressure balance with going out oil pocket Device is arranged on fuel-displaced intracavity and pressure relief device unlatching can be driven when fuel oil overvoltage to make fuel oil warp Oil drain out is discharged.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 1, it is special Levy and be that described pressure equaliser includes and be fixed on accommodation chamber port sealed volume Diaphragm, described connecting tube one end connect through diaphragm and pallet and with oil suction chamber phase Logical, the other end is flexibly connected with pressure relief device in being placed in accommodation chamber；It is provided with flat below diaphragm Weighing apparatus spring, this balancing spring one end compresses mutually with diaphragm, the bottom phase of the other end and accommodation chamber Compress；Described diaphragm can overcome balancing spring elastic force to order about pressure relief device when fuel oil overvoltage Open.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 2, it is special Levy and be to include diaphragm body, seal receptacle and stator, seal receptacle at described diaphragm It is arranged on the port of lower house accommodation chamber and is tightly connected with lower house, seal receptacle is provided with Draw-in groove, connects with seal receptacle sealing in edge, diaphragm body surrounding is placed in draw-in groove and by stator Connect, stator be provided with the first through hole and pressure relief vent, be provided with groove at the first through hole edge, Described connecting tube one end is connected through diaphragm body and the first through hole with pallet and and oil-feed Chamber communicates, and is provided with the first pad and packing ring in the groove of stator, and described pallet is placed in pad On circle and stator interval is arranged, and pressure relief vent connects out oil pocket and diaphragm body.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 3, it is special Levy and be that being equipped with the upper and lower of band through hole respectively in the both ends of the surface of described diaphragm body adds Gu sheet and being bolted to connection；Being provided with release boss on described lower stiffening piece, this unloads Belling platform can open pressure relief device when diaphragm body deformation.

5. the fuel oil according to a kind of built-in filtration core according to any one of claim 1-4 is steady Pressure valve, it is characterised in that described pressure relief device includes oil guide pipe, this oil guide pipe one end with enter Oil pipe is connected, the other end be placed in connecting tube and external diameter less than connecting tube internal diameter with in connecting tube Wall matched in clearance；Being arranged with release sleeve pipe outside oil guide pipe, the end of this release sleeve pipe is placed in down Connecting tube pipe also can be closed under the driving of back lash spring in the underface of the release boss of stiffening piece Mouthful the first operating position and when fuel oil overvoltage diaphragm ontology-driven its make to lead to bottom offset The second operating position that the oil pipe mouth of pipe is communicated with accommodation chamber by release sleeve pipe；Back lash spring one end Compressing mutually with release sleeve pipe, the other end compresses mutually with tube head.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 5, it is special Levy and be that described release sleeve pipe includes sleeve body, be provided with dribbling in one end of sleeve body The base of connected in star, this base can be nested with outside connecting tube and on it under the effect of back lash spring End face is placed in the underface of release boss, is provided with hemispherical plug in the ball recess of base, This plug is nested with outside oil guide pipe, and has and drive base to make it with connecting tube pipe at back lash spring Mouthful end face fits the first operating position sealed and order about diaphragm body when fuel oil overvoltage Deformation makes release boss drive base make itself and connecting tube mouth of pipe end face be separated to bottom offset Second operating position.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 6, it is special Levy and be to be provided with the second pad on the end face of described plug, this second pad and connecting tube End face fits and seals and be set in the outer outside with oil guide pipe of oil guide pipe and fit mutually.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 7, it is special Levying and be that described connecting tube includes tube body and position-limiting tube, tube body passes diaphragm body Being connected with pallet and cannelure is arranged on tube body lateral wall, the internal diameter of position-limiting tube is more than pipe originally The internal diameter of body forms limited step in making position-limiting tube, is provided with spacing ring in the port of oil guide pipe, The external diameter of this spacing ring and position-limiting tube internal diameter match and at least provided with three rows on spacing ring Oil groove；Being provided with annular chuck on described position-limiting tube outer wall, diaphragm body is connected to ring Shape groove is interior and utilizes stator and annular chuck to be tightly connected with connecting tube.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 8, it is special Levy and be on the inwall of described sleeve body, be provided with the guiding suitable with oil guide pipe outer wall Muscle, this guiding rib is structure as a whole with sleeve body.

The fuel oil pressure-stabilizing valve of a kind of built-in filtration core the most according to claim 9, it is special Levy and be to be provided with trepanning on described plug, be provided with in trepanning and match with oil guide pipe outer wall The second guiding rib, this second guiding rib is structure as a whole with plug.