CN104148242A - Coaxial double-hole syringe needle, device and method for liquid droplet subdivision - Google Patents
Coaxial double-hole syringe needle, device and method for liquid droplet subdivision Download PDFInfo
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- CN104148242A CN104148242A CN201410428273.6A CN201410428273A CN104148242A CN 104148242 A CN104148242 A CN 104148242A CN 201410428273 A CN201410428273 A CN 201410428273A CN 104148242 A CN104148242 A CN 104148242A
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- holes
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Abstract
The invention discloses a coaxial double-hole syringe needle, device and method for liquid droplet subdivision. The coaxial double-hole syringe needle comprises a first double-hole syringe needle body and a second double-hole syringe needle body. The first double-hole syringe needle body is used as an inner-hole syringe needle body of the coaxial double-hole syringe needle, liquid to be subdivided is injected from an upper end liquid inlet of the first double-hole syringe needle body, the liquid forms a liquid droplet at the position of a lower end liquid outlet of the first double-hole syringe needle body, and the size of the liquid droplet is related to the diameter of an inner hole of the first double-hole syringe needle body; the second double-hole syringe needle body is used as an outer-hole syringe needle body of the coaxial double-hole syringe needle, and pulse compressed air is input from an upper end air inlet of the second double-hole syringe needle body, and is output from a lower air outlet of the second double-hole syringe needle body; the first double-hole syringe needle body is sleeved with the second double-hole syringe needle body, and the first double-hole syringe needle body and the second double-hole syringe needle body are distributed in a coaxial-structure mode.
Description
Technical field
The invention belongs to a glue, titration technique field, particularly a kind of coaxial needles with two holes, device and method for drop segmentation.
Background technology
In the time forming drop, in order to control droplet size, need to select the syringe needle of different inner diameters, syringe needle internal diameter is less, and the droplet size of formation is less.
At present, thinner syringe needle internal diameter 0.16mm, because of the effect of surface tension of liquid, the about 2mm of the liquid-drop diameter of formation, droplet size ml overcomes syringe needle the internal force of drop is fallen under Action of Gravity Field.In prior art, in order to obtain the more drop of small size, pulse compression air is sent into syringe, liquid in syringe needle is produced to certain impulse force, overcome the internal force between syringe needle and drop, make drop ejection syringe needle, by controlling compressed-air actuated volume, form the drop of small size.
But there is certain shortcoming in the process that adopts compressed air to form droplet:
1, compressed-air actuated volume and pressure, temperature are closely related, accurately control very difficult;
2, air duct exists the air in elasticity, pipeline to have compressibility, has affected compressed air spray volume, and droplet size produces error;
3, compressed air ejection volume is influenced by ambient temperature, and droplet size produces error;
4, droplet size is less, and required syringe needle diameter is less, and syringe needle easily stops up.
Summary of the invention
In view of the above problems, the present invention has been proposed to a kind of coaxial needles with two holes, device and method for drop segmentation that overcomes the problems referred to above or address the above problem is at least in part provided;
For solving the problems of the technologies described above, on the one hand, the invention provides a kind of coaxial needles with two holes for drop segmentation, it is characterized in that, comprise: the first needles with two holes, for the endoporus syringe needle as described coaxial needles with two holes, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes, and form drop at liquid outlet place, the lower end of described the first needles with two holes, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes; The second needles with two holes, for the outer vent needle head as described coaxial needles with two holes, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes, and in the output of the gas outlet, lower end of described the second needles with two holes; Wherein, described the second needles with two holes is set in the outside of described the first needles with two holes, and the two is coaxial configuration and distributes.
Another aspect, the invention provides a kind of device for drop segmentation, comprising: source of the gas, for pulse compression air is provided; Liquid tank, for storing liquid to be segmented; Air pulse generator, for controlling the output frequency of described pulse compression air; Wherein, one end of described air pulse generator is connected with described source of the gas; Coaxial needles with two holes, for obtaining volume required drop; Described coaxial needles with two holes comprises: the first needles with two holes, for the endoporus syringe needle as described coaxial needles with two holes, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes, and form drop at liquid outlet place, the lower end of described the first needles with two holes, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes; The upper end inlet of the first needles with two holes in described coaxial needles with two holes is connected with described liquid tank; Described coaxial needles with two holes also comprises: the second needles with two holes, and for the outer vent needle head as described coaxial needles with two holes, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes, and in the output of the gas outlet, lower end of described the second needles with two holes; The upper end air inlet of the second needles with two holes in described coaxial needles with two holes is connected with the other end of described air pulse generator; Wherein, described the second needles with two holes is set in the outside of described the first needles with two holes, and the two is coaxial configuration and distributes; The first frequency modulation parts and the second frequency modulation parts, for controlling the forming frequency of volume required drop; Wherein, described source of the gas is connected with described liquid tank by described the first frequency modulation parts; Described liquid tank is connected with the upper end inlet of described the first needles with two holes by described the second frequency modulation parts.
Further, described the first frequency modulation parts are pressure-reducing valves; And/or described the second frequency modulation parts are flow valves.
Again on the one hand, the invention provides a kind of method for drop segmentation, comprise the following steps: fill with liquid step; The liquid of the band segmentation of storing in liquid tank is poured into described the first needles with two holes from the upper end inlet of the first needles with two holes; Gas transmission step; Compressed air in source of the gas is inputted described the second needles with two holes from the upper end air inlet of the second needles with two holes; Control is step frequently; Regulate and control the drop forming frequency in described the first needles with two holes by flow valve and pressure-reducing valve; Regulate and control the compressed-air actuated output frequency in described source of the gas by air pulse generator; Forming step; Drop forming frequency in described the first needles with two holes regulating and controlling according to described flow valve, pressure-reducing valve, and the compressed-air actuated output frequency regulating and controlling according to described air pulse generator; Obtain volume required drop from the lower end inlet of described the first needles with two holes.
Further, in described forming step, the droplet size obtaining from the lower end inlet of described the first needles with two holes reduces along with the increase of described compressed air output frequency.
Further, in described forming step, work as f
2=2f
1, v
2=1/2*v
1; Work as f
2=3f
1, v
2=1/3*v
1; Wherein, v
1for the initial volume of described drop, v
2for the droplet size after being subdivided; f
1for described compressed-air actuated initial output frequency, f
2compressed-air actuated output frequency while being subdivided for drop.
Further, in described forming step, work as f
2=f
3, v
2for the maximum of the droplet size after being subdivided; Wherein, v
2for the droplet size after being subdivided; f
2compressed-air actuated output frequency while being subdivided for drop; f
3the forming frequency of drop while being subdivided for drop.
Beneficial effect of the present invention is as described below:
By changing the frequency of the pulse compression air of being inputted by the second needles with two holes 41, the first needles with two holes 40 endoporus of same diameter can form the drop of different volumes; Larger-diameter the first needles with two holes 40 can form the drop of smaller size smaller, and syringe needle is difficult for stopping up; Meanwhile, pulse compression air pressure and volume do not need accurate control.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the coaxial needles with two holes for drop segmentation that Fig. 1 provides for the embodiment of the present invention one; And
The structural representation of the device for drop segmentation that Fig. 2 provides for the embodiment of the present invention two; And
The schematic flow sheet of the method for drop segmentation that Fig. 3 provides for the embodiment of the present invention two.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, belongs to the scope of protection of the invention.
Embodiment mono-
Refer to Fig. 1, a kind of coaxial needles with two holes for drop segmentation that the embodiment of the present invention one provides, comprise: the first needles with two holes 40, for the endoporus syringe needle as described coaxial needles with two holes, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes 40, and form drop at the liquid outlet place, lower end of described the first needles with two holes 40, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes 40; The second needles with two holes 41, for the outer vent needle head as described coaxial needles with two holes, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes 41, and in the output of the gas outlet, lower end of described the second needles with two holes 41; Wherein, described the second needles with two holes 41 is set in the outside of described the first needles with two holes 40, and the two is coaxial configuration and distributes.
Specifically, in the present embodiment one, the first needles with two holes 40 and the second needles with two holes 41 can be made by parts are one-body molded; Wherein, the upper end inlet of the first needles with two holes 40 can be arranged to funnel-form wide aperture, is convenient to liquid to be segmented and is poured into; The lower end liquid outlet of the first needles with two holes 40 can be arranged to Pinhole-shaped slot footpath and be convenient to form drop; Meanwhile, in the second needles with two holes 41, can be opened in the tip-end-side of the second needles with two holes 41 for the compressed-air actuated upper end of input pulse air inlet.
Embodiment bis-
Refer to Fig. 2, a kind of device for drop segmentation that the embodiment of the present invention two provides, the coaxial needles with two holes that this device provides based on the present embodiment one; Comprise: source of the gas 1, for pulse compression air is provided; Liquid tank 2, for storing liquid to be segmented; Air pulse generator 3, for controlling the output frequency of described pulse compression air; Wherein, one end of air pulse generator 3 is connected with source of the gas 1; Coaxial needles with two holes 4, for obtaining volume required drop; Described coaxial needles with two holes 4 comprises: the first needles with two holes 40, for the endoporus syringe needle as described coaxial needles with two holes 4, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes 40, and form drop at the liquid outlet place, lower end of described the first needles with two holes 40, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes 40; The upper end inlet of the first needles with two holes 40 in described coaxial needles with two holes 4 is connected with described liquid tank 2; Described coaxial needles with two holes 4 also comprises: the second needles with two holes 41, for the outer vent needle head as described coaxial needles with two holes 40, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes 41, and in the output of the gas outlet, lower end of described the second needles with two holes 41; The upper end air inlet of the second needles with two holes 41 in described coaxial needles with two holes 4 is connected with the other end of described air pulse generator 3; Wherein, described the second needles with two holes 41 is set in the outside of described the first needles with two holes 40, and the two is coaxial configuration and distributes; The first frequency modulation parts and the second frequency modulation parts, for controlling the forming frequency of volume required drop; Wherein, described source of the gas 1 is connected with described liquid tank 2 by described the first frequency modulation parts 2; Described liquid tank 2 is connected with the upper end inlet of described the first needles with two holes 40 by described the second frequency modulation parts 6.
Preferably, the first frequency modulation parts 5 can be pressure-reducing valve (liquid tank 2 are connected and can realize the pipeline pressure that overcomes the first needles with two holes 40 inside with source of the gas 1 by pressure-reducing valve); The second frequency modulation parts 6 can be flow valves.
It should be noted that, the connection between above each building block can be connected and be communicated by air duct 7.
Specifically, the liquid to be segmented of storing in liquid tank 2 is poured into the first needles with two holes 40 from the upper end inlet of the first needles with two holes 40 by air duct 7; Compressed air in source of the gas 1 passes through air duct 7, air pulse generator 3 successively, from and the upper end air inlet of needles with two holes 41 is input to the second needles with two holes 41; Simultaneously, regulate and control the forming frequency of drop in the first needles with two holes 40 by the first frequency modulation parts 5, the second frequency modulation parts 6, regulate and control the output frequency of pulse compression air in the second needles with two holes 41 by air pulse generator, and then finally realize drop segmentation in the first needles with two holes 40.
Embodiment tri-
Refer to Fig. 3, a kind of method for drop segmentation that the embodiment of the present invention three provides, the device that the method provides based on the embodiment of the present invention two, comprises the steps:
Step S101a: fill with liquid step; The liquid of the band segmentation of storing in liquid tank is poured into described the first needles with two holes from the upper end inlet of the first needles with two holes; Step S101b: gas transmission step; Compressed air in source of the gas is inputted described the second needles with two holes from the upper end air inlet of the second needles with two holes; Step S102: control is step frequently; Regulate and control the drop forming frequency in described the first needles with two holes by flow valve and pressure-reducing valve; Regulate and control the compressed-air actuated output frequency in described source of the gas by air pulse generator; Step S103: forming step; Drop forming frequency in described the first needles with two holes regulating and controlling according to described flow valve, pressure-reducing valve, and the compressed-air actuated output frequency regulating and controlling according to described air pulse generator; Obtain volume required drop from the lower end inlet of described the first needles with two holes.
Specifically, in step S103 (forming step), the droplet size obtaining from the lower end inlet of the first needles with two holes is directly related with the endoporus of the first needles with two holes; The droplet size obtaining reduces along with the increase of described compressed air output frequency.As see table as shown in test data:
In step S103 (forming step), physical relationship can be: work as f
2=2f
1, v
2=1/2*v
1; Work as f
2=3f
1, v
2=1/3*v
1; The like ... wherein, v
1for the initial volume of described drop, v
2for the droplet size after being subdivided; f
1for described compressed-air actuated initial output frequency, f
2compressed-air actuated output frequency while being subdivided for drop.Meanwhile, work as f
2=f
3, v
2for the maximum of the droplet size after being subdivided; Wherein, f
3the forming frequency of drop while being subdivided for drop.
Coaxial needles with two holes, device and method for drop segmentation provided by the invention; Adopt coaxial needles with two holes (the first needles with two holes 40, the second needles with two holes 41), by pulse compression air, the impact of drop is realized to drop segmentation, in actual mechanical process, when pulse compression air output frequency equals the interior drop forming frequency of the first needles with two holes 40, form maximum volume drop; When pulse compression air frequency is greater than drop forming frequency, it is relevant to pulse compression air frequency increase proportional linearity that droplet size reduces ratio; Realize drop segmentation by controlling drop forming frequency and pulse compression air frequency.
In sum, beneficial effect of the present invention for: by changing the frequency of the pulse compression air inputted by the second needles with two holes 41, the first needles with two holes 40 endoporus of same diameter can form the drop of different volumes; Larger-diameter the first needles with two holes 40 can form the drop of smaller size smaller, and syringe needle is difficult for stopping up; Meanwhile, pulse compression air pressure and volume do not need accurate control.
It should be noted last that, above detailed description of the invention is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (7)
1. for a coaxial needles with two holes for drop segmentation, it is characterized in that, comprising:
The first needles with two holes, for the endoporus syringe needle as described coaxial needles with two holes, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes, and form drop at liquid outlet place, the lower end of described the first needles with two holes, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes;
The second needles with two holes, for the outer vent needle head as described coaxial needles with two holes, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes, and in the output of the gas outlet, lower end of described the second needles with two holes;
Wherein, described the second needles with two holes is set in the outside of described the first needles with two holes, and the two is coaxial configuration and distributes.
2. for a device for drop segmentation, it is characterized in that, comprising:
Source of the gas, for providing pulse compression air;
Liquid tank, for storing liquid to be segmented;
Air pulse generator, for controlling the output frequency of described pulse compression air; Wherein, one end of described air pulse generator is connected with described source of the gas;
Coaxial needles with two holes, for obtaining volume required drop;
Described coaxial needles with two holes comprises: the first needles with two holes, for the endoporus syringe needle as described coaxial needles with two holes, liquid to be segmented is poured into from the upper end inlet of described the first needles with two holes, and form drop at liquid outlet place, the lower end of described the first needles with two holes, and the volume of described drop is relevant to the diameter of bore of described the first needles with two holes; The upper end inlet of the first needles with two holes in described coaxial needles with two holes is connected with described liquid tank;
Described coaxial needles with two holes also comprises: the second needles with two holes, and for the outer vent needle head as described coaxial needles with two holes, pulse compression air is transfused to from the upper end air inlet of described the second needles with two holes, and in the output of the gas outlet, lower end of described the second needles with two holes; The upper end air inlet of the second needles with two holes in described coaxial needles with two holes is connected with the other end of described air pulse generator;
Wherein, described the second needles with two holes is set in the outside of described the first needles with two holes, and the two is coaxial configuration and distributes;
The first frequency modulation parts and the second frequency modulation parts, for controlling the forming frequency of volume required drop; Wherein, described source of the gas is connected with described liquid tank by described the first frequency modulation parts; Described liquid tank is connected with the upper end inlet of described the first needles with two holes by described the second frequency modulation parts.
3. according to device claimed in claim 2, it is characterized in that:
Described the first frequency modulation parts are pressure-reducing valves;
And/or,
Described the second frequency modulation parts are flow valves.
4. for a method for drop segmentation, it is characterized in that, comprise the following steps:
Fill with liquid step; The liquid of the band segmentation of storing in liquid tank is poured into described the first needles with two holes from the upper end inlet of the first needles with two holes;
Gas transmission step; Compressed air in source of the gas is inputted described the second needles with two holes from the upper end air inlet of the second needles with two holes;
Control is step frequently; Regulate and control the drop forming frequency in described the first needles with two holes by flow valve and pressure-reducing valve; Regulate and control the compressed-air actuated output frequency in described source of the gas by air pulse generator;
Forming step; Drop forming frequency in described the first needles with two holes regulating and controlling according to described flow valve, pressure-reducing valve, and the compressed-air actuated output frequency regulating and controlling according to described air pulse generator; Obtain volume required drop from the lower end inlet of described the first needles with two holes.
5. according to method claimed in claim 4, it is characterized in that:
In described forming step, the droplet size obtaining from the lower end inlet of described the first needles with two holes reduces along with the increase of described compressed air output frequency.
6. according to method claimed in claim 4, it is characterized in that:
In described forming step, work as f
2=2f
1, v
2=1/2*v
1; Work as f
2=3f
1, v
2=1/3*v
1;
Wherein, v
1for the initial volume of described drop, v
2for the droplet size after being subdivided; f
1for described compressed-air actuated initial output frequency, f
2compressed-air actuated output frequency while being subdivided for drop.
7. according to method claimed in claim 4, it is characterized in that:
In described forming step, work as f
2=f
3, v
2for the maximum of the droplet size after being subdivided;
Wherein, v
2for the droplet size after being subdivided; f
2compressed-air actuated output frequency while being subdivided for drop; f
3the forming frequency of drop while being subdivided for drop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428273.6A CN104148242B (en) | 2014-08-27 | 2014-08-27 | Coaxial double-hole syringe needle, device and method for liquid droplet subdivision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428273.6A CN104148242B (en) | 2014-08-27 | 2014-08-27 | Coaxial double-hole syringe needle, device and method for liquid droplet subdivision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104148242A true CN104148242A (en) | 2014-11-19 |
| CN104148242B CN104148242B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000707A (en) * | 2016-06-23 | 2016-10-12 | 江汉大学 | Sprinkling machine |
| CN110038745A (en) * | 2019-03-29 | 2019-07-23 | 江汉大学 | The device and method of drop subdivision |
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|---|---|---|---|---|
| US4634027A (en) * | 1985-01-04 | 1987-01-06 | Mvm Valve Co., Inc. | Liquid dispensing apparatus and an anti-drip valve cartridge therefor |
| EP0609075A1 (en) * | 1993-01-28 | 1994-08-03 | Nordson Corporation | Improvements in and relating to liquid drop discharge |
| CN1277537A (en) * | 1999-06-02 | 2000-12-20 | 诺德森公司 | Liquid distrubuting system and method for raising contact area between liquid and substrate |
| CN103269804A (en) * | 2010-11-02 | 2013-08-28 | 诺信公司 | Pneumatic liquid dispensing apparatus and method |
| CN204052038U (en) * | 2014-08-27 | 2014-12-31 | 江汉大学 | For coaxial needles with two holes and the device of droplets subdivide |
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2014
- 2014-08-27 CN CN201410428273.6A patent/CN104148242B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634027A (en) * | 1985-01-04 | 1987-01-06 | Mvm Valve Co., Inc. | Liquid dispensing apparatus and an anti-drip valve cartridge therefor |
| EP0609075A1 (en) * | 1993-01-28 | 1994-08-03 | Nordson Corporation | Improvements in and relating to liquid drop discharge |
| CN1277537A (en) * | 1999-06-02 | 2000-12-20 | 诺德森公司 | Liquid distrubuting system and method for raising contact area between liquid and substrate |
| CN103269804A (en) * | 2010-11-02 | 2013-08-28 | 诺信公司 | Pneumatic liquid dispensing apparatus and method |
| CN204052038U (en) * | 2014-08-27 | 2014-12-31 | 江汉大学 | For coaxial needles with two holes and the device of droplets subdivide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000707A (en) * | 2016-06-23 | 2016-10-12 | 江汉大学 | Sprinkling machine |
| CN110038745A (en) * | 2019-03-29 | 2019-07-23 | 江汉大学 | The device and method of drop subdivision |
| CN110038745B (en) * | 2019-03-29 | 2024-05-14 | 江汉大学 | Device and method for droplet subdivision |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104148242B (en) | 2017-01-25 |
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