CN110252591A - Injection valve - Google Patents
Injection valve Download PDFInfo
- Publication number
- CN110252591A CN110252591A CN201910456463.1A CN201910456463A CN110252591A CN 110252591 A CN110252591 A CN 110252591A CN 201910456463 A CN201910456463 A CN 201910456463A CN 110252591 A CN110252591 A CN 110252591A
- Authority
- CN
- China
- Prior art keywords
- injection valve
- gap
- width
- outlet
- sealing element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 30
- 239000007924 injection Substances 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1026—Valves
- B05C11/1031—Gate valves; Sliding valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
- B05C5/0229—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet the valve being a gate valve or a sliding valve
- B05C5/0233—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet the valve being a gate valve or a sliding valve rotating valve, e.g. rotating perforated cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A kind of injection valve has the medium channel for leading to outlet, which can be closed by sealing element, which can seal against seat setting.Seal receptacle has the sealing surface of annular strip form.The long service life of injection valve, suitable for being measured to very small amount.
Description
Technical field
This application involves a kind of injection valves of amount for metered media in a non-contact manner.
Background technique
In the production of the equipment of electronic component and such as smart phone and tablet computer, mass production step needs gluing
Technique.For this purpose, usually using injection valve, this is because, on the one hand, injection valve can be realized in a non-contact manner using bonding
Agent (or other media), on the other hand, they also can be realized very high measurement frequency.Since the component of electronic equipment is got over
It more minimizes, at this moment needs the dropping liquid of adhesive smaller, and adhesion gap is narrower.In addition, the metered amount of each spray distribution
(metering quantity) also depends on the shape of the seal receptacle of metering valve.
The shape of seal receptacle is usually by spherical ball, cone, cylinder or multiple flat surface compositions, depending on manufacture
It is fixed.This is equally applicable to the sealing element moved by tappet gear, typically needle.It usually has and sealing element
Or the spherical shape or conical shape of the same spherical shape or machining of sealing structure.However, the limitation of this geometry causes
It can hardly further reduce metered amount.
It is also contemplated that the sharp cone distal being sealed in the gauge needle of the edge of valve seat is another geometry.In fact,
This shape makes the service life of gauge needle very short.
Needle must be in the middle position on sealing surface, so that valve is suitably sealed in the off state.It can lead to
It crosses sealing surface and realizes this requirement.But the effect of the center of sealing surface means the angle that gauge needle intersects with valve seat
It will not be too small.However, the angle also defines the volume for ejecting the medium of valve downwards from discharge outlet.
Escape velocity must reach the degree for being enough to overcome dielectric surface tension in injection period.And surface tension depends on
In the outer surface of nozzle and the design of outer profile.It is determined when metered amount is closed by valve by the dielectric capacity accelerated.The capacity
By the ratio between the flow resistance in the flow resistance and sealing surface of the passing away of nozzle and when the flowing of nozzle passage
Resistance be less than sealing surface flow resistance when sealing element when closed still through stroke generate.Once the flowing of sealing surface
Resistance is greater than the flow resistance of nozzle passage, just no longer pushes back medium along sealing surface when valve is closed, but passes through nozzle
Promotion medium acceleration in channel passes through nozzle passage.
Summary of the invention
The purpose of the application is to provide a kind of injection valve with high service life, and can be with very by the injection valve
Small amount sprays high viscosity medium.
This purpose can be achieved by following feature.
There is medium channel according to the injection valve of the application, which leads to outlet and can pass through spherical sealed
Part closing, the spherical sealing element can seal against seat setting.According to the application, seal receptacle has curved annular bar spherical in shape
The sealing surface of band forms, and seal receptacle have spherical surface profile, the surface profile after sealing surface and with sealing element interval
It opens, and forms gap with sealing element when the latter seals against face.
It will recognize according to the application, reduce accelerated dielectric capacity the subtracting for metered capacity below seal receptacle
It is small to be advantageous.But the sealing surface effectively to work must simultaneously remain very little area.If sealing surface is too big, meter
Moving downward for metering pin can be by excessive attenuation/braking, and is no longer possible ejection medium, especially high viscosity medium.Due to table
Facial contour and sealing element be at least in the region in gap it is spherical, therefore, can provide between surface profile and sealing element
The very small capacity of shell spherical in shape.
The preferred embodiment of the application is described in the description of the present application, attached drawing and dependent claims.
According to an embodiment, the width in the gap between the surface profile and sealing element of sealing surface can be no more than annular
Thus the width of band prevents the closing movement of sealing element from generating apparent hydrodynamic damping.
According to another preferred embodiment, step can be set between surface profile and sealing surface.Thus, it is possible to ensure a side
There is the annular strip of rent purchase debt as sealing surface in face；On the other hand, it can be provided between surface profile and sealing element small
But enough gaps.
According to another preferred embodiment, surface profile can be extended parallel in the region in gap with sealing element.Cause
This, when closing valve in the region in gap, medium is compressed into thin liquid film, without apparent damping occurs.
According to another preferred embodiment, the width of annular strip can be about 25 μm to 55 μm, in particular 30 μm to 50 μ
m.Enough sealing surfaces are on the one hand provided as a result, and on the other hand provide sufficiently small sealing surface.
According to another preferred embodiment, the width in gap can be about 1 μm to 30 μm, in particular 5 μm to 25 μm.?
It was found that using this size, on the one hand, sufficiently large volume can be provided between sealing element and surface profile so that fluid
Dynamic damping minimizes, and on the other hand, which selects to be so small that the medium of very low capacity can be sprayed.
According to another preferred embodiment, hole can be set at the center in gap, which leads to outlet, the hole
It is conically tapered since gap first, is subsequently formed into hollow cylindrical passing away until outlet.In this side
Face, the hollow cylindrical passing away of hole can have 40 μm to 50 μm of diameter and/or about 100 μm to 300 μm of length
Degree.Using such size, very small amount of medium can be measured by high cycle-index.
According to another preferred embodiment, outlet is configured to the aperture of hollow cylindrical passing away, and comes from cross section
It sees, the angle between the wall of passing away and the surface around outlet is acute angle, and the angle is more special in particular less than 60 °
It is not 45 ° or smaller.Thus, it is possible to significantly reduce the medium for the metering accumulated on the outer surface of outlet.The medium
Curved surface is encountered in an edge.The tension on surface is minimized surface and has edge, so that wait moisten
Wet liquid can shift on the direction on flat surface.Therefore, the thickness of liquid level reduces in the region at edge, and liquid film
It can fall off and (dry).The angle at edge is more sharp, then this effect is stronger.
According to another preferred embodiment, discharge outlet cannot be formed in the core of valve.This means that outlet and leading to its
Passing away is to be obtained with continuous continual material processing, such as process in the housing parts of injection valve.Compared to existing skill
The known discharge nozzle in art center is formed as the mode of core, is given the advantage that according to the application, does not need individually to assemble,
And it also need not be by the centrally-disposed this operation of core.Meanwhile outlet and passing away can form fairly small.
According to another preferred embodiment, the width in the gap between sealing surface and the passing away for leading to outlet can be by
Step reduces, and is especially reduced to about 10 μm to 15 μm.Here it is possible to be realized by the annular connecting piece around hole setting
The reduction in gap.
In this embodiment, sealing surface can also have sufficiently large angle.However, between sealing element and seal receptacle
Gap can be formed directly as bigger after sealing surface.But the gap gradually reduces in the region around passing away
To usually 10 μm.This relatively thin gap increases the flow resistance of the useful effect of nozzle.Therefore, for working as nozzle passage
Flow resistance when being less than the flow resistance of sealing surface the stroke that still generates when closed of sealing element, the trip can become more
It is small, and therefore can also reduce metered amount.
Detailed description of the invention
Below with reference to preferred embodiment and attached drawing, the application is described only by exemplary mode.
Fig. 1 shows a kind of cross section of the injection valve of embodiment；
Fig. 2 shows the cross sections of the injection valve of another embodiment.
Specific embodiment
Injection valve is shown partially just in Fig. 1 with medium channel 10, the medium channel 10 lead to outlet 12 and
It can be closed by sealing element 14, sealing element 14 can seal against the setting of seat 16.Sealing element 14 in illustrated embodiment has
There is spherical shape, is fixed to the one end of needle 18.Here, needle is in known manner by with enough multi-cycles time
Several valve drives is resisted the power of spring and is arranged on seal receptacle.
The sealing surface 20 shaped at valve seat 16 between sealing element 14 and valve seat 16 for being sealed.Described is close
Cover 20 is formed as the chamfering form of sealing, and the annular strip (spherical surface as illustrated embodiment for being B with width
A part) shape.
Seal receptacle 16 also has the surface profile 22 behind sealing surface 20 and on the direction of outlet 12, surface wheel
Exterior feature 22 is spaced apart with sealing element 14, and the formed gap 24 when sealing element 14 connects sealing surface 20.Here, gap
24 width S may be selected such that its width B no more than the annular strip of sealing surface 20.
As is further illustrated in figure 1, step 26 with annular shape is between sealing surface 20 and surface profile 22.Due to
Surface profile 22 and sealing element 14 are all radiuses spherical and having the same, therefore surface profile and sealing element 14 are flat
Extended in the region in gap 24 capablely, and step 26 determine it is membranaceous (spherical curved between surface profile and sealing element
Bent) volume.
In the embodiment shown in fig. 1, sealing surface 20(seals chamfering) annular strip range of the width B at about 40 μm
It is interior, and the angle between the central axis of the tangent line and injection valve at sealing surface 20 is equivalent to about 45 °, can be obtained so good
Gather (centration).Meanwhile the width selection in gap 24, in about 10 μm to 20 μm of the order of magnitude, this is enough to make fluid
Dynamic damping minimize and it is sprayable simultaneously go out unusual low capacity medium.
When closing sealing element 14, the hole for leading to outlet 13 by one carries out medium and supplies via medium channel 10
Discharge, originally which is conically tapered since gap 34 in the first component 28, be subsequently formed into hollow circuit cylinder
Shape passing away 30 is until outlet 12.In this respect, the diameter of hollow cylindrical passing away 30 is about 40 μm to 50 μm
And/or length is about 100 μm to 300 μm.
Outlet 12 is also configured to the aperture of hollow cylindrical passing away 30, and from the point of view of cross section, passing away 30
Wall 32 and outlet 12 around surface 34 between angle [alpha] be acute angle, be equivalent to about 45 ° in the shown embodiment.
It is not formed in finally, Fig. 1 shows outlet 12 and can screw in or otherwise be inserted into the core of valve body.Row
Outlet 12 and passing away 30 are on the contrary continuous unremitting material (solid material), as injection valve with it is close
Seal the component that seat 16 and sealing surface 20 are integrally formed.
The geometry that can reduce another seal receptacle of metered amount is shown in Fig. 2.The injection valve of embodiment illustrated in fig. 2
Correspond to the embodiment of Fig. 1 on Basic Design, therefore only needs to see difference.In the embodiment depicted in figure 2, spherical surface
The width S in the gap 24 between profile 22 and sealing element 14 is more much bigger than the width in embodiment illustrated in fig. 1.But gap
24 are gradually reduced in the region around nozzle passage 28,30 by annular connecting piece (annualar web) 34, such as are reduced to
About 10 μm of gap width S'.This thin gap in passing away region increases the discharge spray for effectively acting on discharge
The flow resistance of mouth.Therefore, for when the flow resistance of nozzle passage be less than sealing surface flow resistance when sealing element 14 most
The stroke still generated when closed eventually, the trip can become smaller, and therefore can also reduce metered amount.
Fig. 2 shows in an illustrated embodiment, annular connecting piece is arranged in the taper tapering region 28 of passing away
Center.
Claims (11)
1. a kind of injection valve, which is characterized in that the injection valve has medium channel (10), which leads to outlet and energy
It is enough closed by spherical sealing element (14), which can seal against seat (16) setting, wherein the seal receptacle
(16) with the sealing surface (20) of curved annular strip form spherical in shape, and the seal receptacle (16) has spherical surface profile
(22), which is spaced apart after the sealing surface (20) and with the sealing element (14), and when the latter is against described
Gap (24) are formed with sealing element (14) when sealing surface (20).
2. injection valve according to claim 1, which is characterized in that step (26) is arranged in the surface profile (22) and institute
It states between sealing surface (20).
3. injection valve according to claim 1 or 2, which is characterized in that the surface profile (22) is in the gap (24)
In extended parallel to sealing element (14).
4. according to injection valve described in any one of aforementioned claim, which is characterized in that the width (S) of the gap (24) is little
In the width (B) of the annular strip.
5. injection valve according to claim 4, which is characterized in that the width (B) of the annular strip is 25 μm to 55 μ
M, in particular 30 μm to 50 μm.
6. the injection valve according to preceding claims 4 or 5, which is characterized in that the width (S) in the gap is 1 μm to 30
μm, in particular 5 μm to 25 μm.
7. according to injection valve described in any one of aforementioned claim, which is characterized in that set at the center of the gap (24)
It is equipped with hole (28,30), which leads to the outlet (12), initially conically gradually becomes since the gap (24)
Carefully, hollow cylindrical passing away (30) are subsequently formed into until the outlet (12).
8. injection valve according to claim 7, which is characterized in that the diameter of the hollow cylindrical passing away of the hole
It is 100 μm to 300 μm for 40 μm to 50 μm and/or length.
9. according to injection valve described in any one of aforementioned claim, which is characterized in that the outlet (12) is configured to described
The aperture of hollow cylindrical passing away (30), and from the point of view of cross section, the wall (32) of the passing away (30) and the row
The angle exported between the surface around (12) is acute angle, and the angle is in particular less than 60 °, more particularly 45 ° or smaller.
10. according to injection valve described in any one of aforementioned claim, which is characterized in that the sealing surface (20) and described in leading to
The width (S) in the gap (24) between the hole (28,30) of discharge outlet (12) is gradually decreased to a reduced width (S'), especially
Ground, the width (S') of the reduction are about 10 μm to 15 μm.
11. injection valve according to claim 10, which is characterized in that pass through the ring around the hole (28,30) setting
Shape connecting piece (34) realizes the reduction in the gap.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018114030.4 | 2018-06-12 | ||
| DE102018114030 | 2018-06-12 | ||
| DE102019107836.9A DE102019107836A1 (en) | 2018-06-12 | 2019-03-27 | Jet valve |
| DE102019107836.9 | 2019-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110252591A true CN110252591A (en) | 2019-09-20 |
Family
ID=67915878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910456463.1A Pending CN110252591A (en) | 2018-06-12 | 2019-05-29 | Injection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110252591A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114763844A (en) * | 2021-01-15 | 2022-07-19 | 玛珂系统分析和开发有限公司 | Metering valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435488A (en) * | 1994-02-17 | 1995-07-25 | Nordson Corporation | Method and apparatus for discharging liquid through a nozzle having a hood |
| JPH08254170A (en) * | 1994-12-20 | 1996-10-01 | Robert Bosch Gmbh | Valve and manufacture of valve |
| JP2000501331A (en) * | 1995-11-16 | 2000-02-08 | ノードソン コーポレーション | Method and apparatus for dispensing small amounts of liquid material |
| US20110042605A1 (en) * | 2007-01-10 | 2011-02-24 | Fritz Gyger | Micro-valve |
| DE102014217367A1 (en) * | 2014-09-01 | 2016-03-03 | Ford Global Technologies, Llc | Valve arrangement for a fuel injection valve |
| CN206334774U (en) * | 2016-12-26 | 2017-07-18 | 威准（厦门）自动化科技有限公司 | A kind of injection valve |
-
2019
- 2019-05-29 CN CN201910456463.1A patent/CN110252591A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435488A (en) * | 1994-02-17 | 1995-07-25 | Nordson Corporation | Method and apparatus for discharging liquid through a nozzle having a hood |
| JPH08254170A (en) * | 1994-12-20 | 1996-10-01 | Robert Bosch Gmbh | Valve and manufacture of valve |
| JP2000501331A (en) * | 1995-11-16 | 2000-02-08 | ノードソン コーポレーション | Method and apparatus for dispensing small amounts of liquid material |
| US20110042605A1 (en) * | 2007-01-10 | 2011-02-24 | Fritz Gyger | Micro-valve |
| DE102014217367A1 (en) * | 2014-09-01 | 2016-03-03 | Ford Global Technologies, Llc | Valve arrangement for a fuel injection valve |
| CN206334774U (en) * | 2016-12-26 | 2017-07-18 | 威准（厦门）自动化科技有限公司 | A kind of injection valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114763844A (en) * | 2021-01-15 | 2022-07-19 | 玛珂系统分析和开发有限公司 | Metering valve |
| CN114763844B (en) * | 2021-01-15 | 2024-06-11 | 玛珂系统分析和开发有限公司 | Metering valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190920 |