CN104343507B - A kind of hydraulic-driven injection apparatus - Google Patents
A kind of hydraulic-driven injection apparatus Download PDFInfo
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- CN104343507B CN104343507B CN201410593644.6A CN201410593644A CN104343507B CN 104343507 B CN104343507 B CN 104343507B CN 201410593644 A CN201410593644 A CN 201410593644A CN 104343507 B CN104343507 B CN 104343507B
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- injection apparatus
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Abstract
The invention discloses a kind of hydraulic-driven injection apparatus, it includes valve body, valve rod, valve element, valve seat, inlet, liquid outlet and elastic parts, wherein, the valve seat is arranged at the bottom of the valve body and offers spray orifice thereon, inlet and liquid outlet are provided with the valve body, and accommodating cavity for helical pitch is offered on the valve body, elastic parts is disposed with from top to bottom in the accommodating cavity, valve rod and valve element, the elastic parts is pressed on the top of the valve rod, relief hole is offered on the valve rod, the bottom of the valve rod is installed by valve element, the bottom of the valve element is planar structure, valve land is pressed on valve seat by flat seal, the inlet flow area is more than the flow area of relief hole on valve rod.Above-mentioned hydraulic-driven injection apparatus reaches the injection apparatus that valve is opened and closed using fluid pressure difference, with simple in construction, is easy to processing, the advantage of low cost, while in turn ensure that sealing and use requirement.
Description
Technical field
Dress is sprayed the present invention relates to a kind of injection apparatus, more particularly to a kind of hydraulic-driven for SCR spraying systems
Put.
Background technology
Refer to install for selective catalytic conversion system of diesel engine SCR (Selective Catalyst Reduction)
In diesel engine automobile air exhausting system, the NOx in diesel emission is catalysed and reduced into N2And O2Catalytic reduction device, selection urine
The plain aqueous solution is used as reducing agent.Aqueous solution of urea is ejected into the blast pipe of catalyst upstream, in EGT and the work of air-flow
CO is produced as with lower hydrolysis2And ammonia, NOx is reduced into free of contamination nitrogen and water by ammonia as reducing agent.Urea liquid root
According to engine operating condition metered injection.
SCR spraying systems are the important components of SCR aftertreatment system, and its injection apparatus is even more whole SCR injections system
The critical component of system, at present, the existing injection apparatus generally existing complex structure for SCR spraying systems, machining accuracy are high
With shortcoming with high costs.
The content of the invention
It is an object of the invention to provide a kind of hydraulic-driven injection apparatus, its have it is simple in construction, be easy to processing and
The characteristics of low cost, to solve the above mentioned problem existed in the prior art for the injection apparatus of SCR spraying systems.
For up to this purpose, the present invention uses following technical scheme：
A kind of hydraulic-driven injection apparatus, it includes valve body, valve rod, valve element, valve seat, inlet, liquid outlet and elasticity
Component, wherein, the valve seat is arranged at the bottom of the valve body and offers spray orifice thereon, and inlet is provided with the valve body
And offered on liquid outlet, and the valve body in the accommodating cavity for helical pitch, the accommodating cavity and be disposed with bullet from top to bottom
Property component, valve rod and valve element, the elastic parts is pressed on the top of the valve rod, the valve rod and offers relief hole, described
Valve element is installed in the bottom of valve rod, and the bottom of the valve element is planar structure, and valve land is pressed on valve seat by flat seal, institute
State flow area of the inlet flow area more than relief hole on valve rod.
Especially, the elastic parts includes the stop collar, spring and regulation steel ball for being used to constrain valve rod travel, the limit
Position set is arranged at the top of the valve rod, and the bottom of the spring is arranged in stop collar, and the regulation steel ball is arranged at described
The top of spring.
Especially, the bottom sides of the valve rod, which are provided with mounting hole, the valve element, is provided with steel ball, and the valve element leads to
Cross steel ball to be socketed in stem bottom mounting hole, so as to ensure valve element and valve rod linkage and have certain free degree each other.
During work, reached by closing liquid outlet and build pressure purpose, fluid enters valve inner, valve element and valve from inlet
Bar transfixion in the presence of spring force and hydraulic coupling, when liquid outlet is opened, the rapid pressure drop on valve rod top and obtain
Less than timely supplement, valve rod obtains acceleration under the effect of bottom fluid power, so as to open valve seat with movable valve plug.Opened in valve seat
When, because inlet flow is much larger than emitted dose, and inlet flow area is more than the relief hole on valve rod, so as to ensure injection
Pressure is constant, can be with precise control emitted dose by the time for controlling liquid outlet to open.
Beneficial effects of the present invention are that the hydraulic-driven injection apparatus has advantages below compared with prior art：
1) there is the plane valve element of steel ball using valve stem sleeve tape splicing, that is, ensure that the open guidance problem of valve, also solve valve
The sealing problem of seat.Plane valve element operationally ensure that good sealing effectiveness and certain guiding, it is ensured that response speed；
Plane valve element has certain free degree to valve rod simultaneously, to avoiding the very high axiality requirement of valve rod and sealing surface.
2) valve seat and valve body use split type scheme, it is to avoid deep hole machining problem；And spray orifice can be out of valve seat
Portion is outwards punched, beneficial to deburring and cleaning attachment.
3) using liquid return hole pressure release is opened, close liquid return hole to build pressure, reach the purpose of valve seat opening and closing, and pressure
Room is constant pressure all the time, has reached constant pressure injection, and precision is higher, it is to avoid the Opening pressure problem of conventional valve.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram for the hydraulic-driven injection apparatus that the specific embodiment of the invention 1 is provided；
Fig. 2 is the profile for the hydraulic-driven injection apparatus that the specific embodiment of the invention 1 is provided；
Fig. 3 is the partial enlarged drawing at A in Fig. 2.
In figure：
1st, valve body；2nd, valve rod；3rd, valve element；4th, valve seat；5th, inlet；6th, liquid outlet；7th, stop collar；8th, spring；9th, adjust
Steel ball；10th, relief hole；11st, mounting hole；12nd, steel ball.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Refer to shown in Fig. 1 to Fig. 3, in the present embodiment, a kind of hydraulic-driven injection apparatus include valve body 1, valve rod 2,
Valve element 3, valve seat 4, inlet 5, liquid outlet 6, stop collar 7, spring 8 and regulation steel ball 9, the valve seat 4 are arranged at the valve body 1
Bottom and offer spray orifice thereon, be provided with inlet 5 and liquid outlet 6, and the valve body 1 and offer on the valve body 1
It is disposed with regulation steel ball 9, spring 8, stop collar 7, valve rod 2 from top to bottom for the accommodating cavity of helical pitch, in the accommodating cavity
With valve element 3, the stop collar 7 is arranged at the top of the valve rod 2 for constraining the stroke of valve rod 2, and the bottom of the spring 8 is set
It is placed in stop collar 7, the regulation steel ball 9 is arranged at the top of the spring 8.Regulation steel ball 9 is adjusted by compression distance
Pretightning force of the spring 8 to valve rod 2.
Relief hole 10 is offered on the valve rod 2, the bottom sides of the valve rod 2 are provided with mounting hole 11, the valve element 3
On be provided with steel ball 12, the valve element 3 is socketed in the bottom mounting apertures 11 of valve rod 2 by steel ball 12, so as to ensure valve element 3 and valve
Bar 2 links and has certain free degree each other.The valve element 3 is the flat valve that bottom is planar structure, and valve element 3 is taken a seat logical
Cross flat seal to be pressed on valve seat 4, the flow area of inlet 5 is more than the flow area of relief hole 10 on valve rod 2.
During work, reached by closing liquid outlet 6 and build pressure purpose, fluid enters inside valve body 1 from inlet 5, valve element 3
With valve rod 2 in the presence of spring force and hydraulic coupling transfixion, when liquid outlet 6 is opened, under the pressure on the top of valve rod 2 is rapid
Drop and cannot supplement in time, valve rod 2 obtains acceleration under the effect of bottom fluid power, so as to open valve seat 4 with movable valve plug 3.
When valve seat 4 is opened, because the flow of inlet 5 is much larger than emitted dose, and the flow area of inlet 5 is more than the relief hole on valve rod 2
10, so that ensure that injection pressure is constant, can be with precise control emitted dose by the time for controlling liquid outlet to open.
Above example is the general principle and characteristic for elaborating the present invention, and the present invention is not limited by above-mentioned example,
Without departing from the spirit and scope, the present invention also has various change and change, and these changes and modifications are both fallen within
In scope of the claimed invention.The claimed scope of the invention is by appending claims and its equivalent thereof.
Claims (3)
1. a kind of hydraulic-driven injection apparatus, it includes valve body, valve rod, valve element, valve seat, inlet, liquid outlet and elastic group
Part, it is characterised in that the valve seat is arranged at the bottom of the valve body and offers spray orifice thereon, be provided with the valve body into
Offer and set gradually from top to bottom in the accommodating cavity for helical pitch, the accommodating cavity on liquid mouthful and liquid outlet, and the valve body
Flexible component, valve rod and valve element, the elastic parts are pressed on the top of the valve rod, the valve rod and offer relief hole,
Valve element is installed in the bottom of the valve rod, and the bottom of the valve element is planar structure, and valve land is pressed in valve seat by flat seal
On, the inlet flow area is more than the flow area of relief hole on valve rod.
2. hydraulic-driven injection apparatus according to claim 1, it is characterised in that the elastic parts includes being used for about
Stop collar, spring and the regulation steel ball of beam valve rod travel, the stop collar are arranged at the top of the valve rod, the bottom of the spring
End is arranged in stop collar, and the regulation steel ball is arranged at the top of the spring.
3. hydraulic-driven injection apparatus according to claim 1 or 2, it is characterised in that the bottom sides of the valve rod
It is provided with mounting hole, the valve element and is provided with steel ball, the valve element is socketed in stem bottom mounting hole by steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593644.6A CN104343507B (en) | 2014-10-29 | 2014-10-29 | A kind of hydraulic-driven injection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593644.6A CN104343507B (en) | 2014-10-29 | 2014-10-29 | A kind of hydraulic-driven injection apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104343507A CN104343507A (en) | 2015-02-11 |
| CN104343507B true CN104343507B (en) | 2017-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410593644.6A Active CN104343507B (en) | 2014-10-29 | 2014-10-29 | A kind of hydraulic-driven injection apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145652A (en) * | 1995-02-15 | 1997-03-19 | 罗伯特·博施有限公司 | Fuel injection device for I.C engine |
| US5938124A (en) * | 1996-05-20 | 1999-08-17 | Lowi, Jr.; Alvin | Positive-displacement-metering, electro-hydraulic fuel injection system |
| CN102812232A (en) * | 2010-02-18 | 2012-12-05 | 欧陆汽车有限责任公司 | High-pressure fuel injection valve for an internal combustion engine |
| CN103261659A (en) * | 2010-12-10 | 2013-08-21 | 瓦锡兰芬兰有限公司 | A fuel injection apparatus, a piston engine and method of operating a piston engine |
| CN204225974U (en) * | 2014-10-29 | 2015-03-25 | 凯龙高科技股份有限公司 | A kind of hydraulic-driven injection apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB698144A (en) * | 1951-07-25 | 1953-10-07 | Cav Ltd | Liquid fuel injection nozzles |
| DE10239777A1 (en) * | 2002-08-29 | 2004-03-18 | Robert Bosch Gmbh | Device for venting a conveyor unit |
| CN201180828Y (en) * | 2008-04-11 | 2009-01-14 | 宁波华缘气体控制设备制造有限公司 | Safety valve |
| DE102011089360A1 (en) * | 2011-12-21 | 2013-06-27 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
-
2014
- 2014-10-29 CN CN201410593644.6A patent/CN104343507B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145652A (en) * | 1995-02-15 | 1997-03-19 | 罗伯特·博施有限公司 | Fuel injection device for I.C engine |
| US5938124A (en) * | 1996-05-20 | 1999-08-17 | Lowi, Jr.; Alvin | Positive-displacement-metering, electro-hydraulic fuel injection system |
| CN102812232A (en) * | 2010-02-18 | 2012-12-05 | 欧陆汽车有限责任公司 | High-pressure fuel injection valve for an internal combustion engine |
| CN103261659A (en) * | 2010-12-10 | 2013-08-21 | 瓦锡兰芬兰有限公司 | A fuel injection apparatus, a piston engine and method of operating a piston engine |
| CN204225974U (en) * | 2014-10-29 | 2015-03-25 | 凯龙高科技股份有限公司 | A kind of hydraulic-driven injection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104343507A (en) | 2015-02-11 |
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Denomination of invention: A hydraulically driven injection device Effective date of registration: 20210727 Granted publication date: 20170714 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Xishan branch Pledgor: KAILONG HIGH TECHNOLOGY Co.,Ltd. Registration number: Y2021320010276 |