CN217016673U - Super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops - Google Patents
Super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops Download PDFInfo
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- CN217016673U CN217016673U CN202123419672.0U CN202123419672U CN217016673U CN 217016673 U CN217016673 U CN 217016673U CN 202123419672 U CN202123419672 U CN 202123419672U CN 217016673 U CN217016673 U CN 217016673U
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- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
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- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
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Abstract
The utility model provides a super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops, wherein a disc device with a super-hydrophobic concentric ring is additionally arranged at a common flat-mouth needle head, extruded liquid is pinned by the super-hydrophobic ring in the growing process, and only when the liquid drops grow to a certain characteristic value (at the moment, the liquid drops have a certain characteristic liquid quantity), the liquid drops can span the super-hydrophobic ring at the outer side of the super-hydrophobic ring to expand, and then the processes of pinning, growing to a certain characteristic liquid quantity and spanning the super-hydrophobic ring are repeated, so that the accurate quantitative liquid drops with different liquid quantities are prepared. Meanwhile, the super-hydrophobicity of the concentric rings can endow the needle head with the super-hydrophobicity concentric rings with the characteristic of low adhesion in the subsequent liquid drop transfer process, so that the liquid drops can be easily separated from the needle head, and the low-residue distribution of the liquid drops is realized. The method has the advantages of simple preparation and low cost, and is very suitable for actual production and life.
Description
Technical Field
The utility model relates to the technical field of general physical or chemical methods or devices, in particular to a super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops.
Background
The prior art, for example, realizes low adhesion and residue-free distribution of small liquid drops through a super-hydrophobic treatment needle, and only one liquid drop preparation can be realized by the same needle, and the liquid drop amount cannot be accurately controlled. Other techniques, such as dispensing small droplets by spraying by means of pneumatic, hydraulic or piezoelectric means, require the introduction of external energy and have the drawback of being complex and costly to operate.
Therefore, the search for a needle that can produce drops of different amounts with low adhesion and no residue transfer is a common concern for needle production companies and laboratory and analytical staff.
Disclosure of Invention
The utility model aims to solve the problem of liquid drop volume control, and provides a super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops. Meanwhile, the super-hydrophobicity of the concentric rings can endow the needle head with the super-hydrophobicity concentric rings with the characteristic of low adhesion in the subsequent liquid drop transfer process, so that the liquid drops can be easily separated from the needle head, and the low-residue distribution of the liquid drops is realized. The method has the advantages of simple preparation and low cost, and is very suitable for actual production and life.
The utility model provides a super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops, which comprises a needle and a super-hydrophobic concentric disc, wherein the super-hydrophobic concentric disc is arranged at the front end of the needle and is vertical to the needle;
the needle head is a hollow cylinder and comprises a needle head body and a first liquid channel arranged in the center of the needle head body;
the super-hydrophobic concentric disc comprises a disc body vertical to the needle head body, a second liquid channel arranged in the center of the disc body and communicated with the first liquid channel, and a circular ring channel group arranged on the disc body and taking the axis of the second liquid channel as the axis, wherein the disc body is a cylinder, the disc body and the needle head body are of an integrated structure, and the first liquid channel and the second liquid channel are through holes with the same diameter;
the annular channel group comprises a plurality of annular channels which are arranged from inside to outside, the annular channels are of annular groove structures with gaps, the inner wall of the innermost annular channel and the surface of the second liquid channel are the same curved surface, the directions of the gaps of the two adjacent annular channels are opposite, and the gaps are liquid flowing channels.
According to the super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops, as a preferred mode, the width of the ring channel is smaller than the interval between the two ring channels.
The super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops is preferably characterized in that the diameter of the disc body is larger than the thickness of the disc body.
The super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops is characterized in that a ring channel is subjected to super-hydrophobic modification as an optimal mode.
According to the super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops, the super-hydrophobic modification is fluorinated super-hydrophobic modification as a preferred mode.
The super-hydrophobic concentric ring needle capable of accurately preparing various quantitative liquid drops is characterized in that a ring channel is provided with a super-hydrophobic coating layer as a preferred mode.
According to the super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops, as a preferred mode, the needle head and the super-hydrophobic concentric disc are made of any one of the following materials: polytetrafluoroethylene, polyethylene terephthalate, polypropylene, aluminum, stainless steel.
The technical scheme of the utility model is as follows: by adopting the design of the super-hydrophobic concentric rings, the pinning of specific sites of the liquid drops in the growth process can be realized, so that a quantitative threshold is provided for the liquid drop volume.
The design of the super-hydrophobic rings with different diameters realizes the corresponding relation between the liquid drop amount and the diameter of the super-hydrophobic rings, and then realizes the accurate control of the liquid drop amount.
Due to the super-hydrophobicity of the concentric rings, the liquid-solid adhesion at the position is extremely low, and low-residue and high-efficiency liquid drop transfer can be realized.
The preparation process of the utility model is as follows: firstly, obtaining a needle blank with a needle structure and a disc structure through a 3D printing or injection molding preparation process according to the design parameters of the needle with the super-hydrophobic concentric ring; the concentric rings can be prepared in the 3D printing process and can also be obtained by adopting a laser or chemical etching method; further, the concentric rings are super-hydrophobized (which can be achieved by a method of fluorinated modification or spraying of super-hydrophobic paint), and the needle with the super-hydrophobized concentric rings is obtained.
The needle head is made of the following materials: the needle head can be made of light-cured resin, Polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polypropylene (PP) and other high polymer materials, and aluminum, stainless steel and other metal materials.
The function realization process is as follows: adding a disc structure at the outlet (1) of a common flat-mouth needle, wherein the disc structure is provided with a plurality of super-hydrophobic concentric rings (2) with different diameters; during the extrusion process, the liquid can be pinned at the super-hydrophobic concentric ring, and further the spreading along the surface of the needle head is limited; when the liquid drop grows to a certain characteristic threshold value, the pinning effect of the super-hydrophobic circular ring can not limit the spreading of the liquid, and the liquid can cross the super-hydrophobic concentric circular ring through the channel (3) of the super-hydrophobic circular ring and extend to the next super-hydrophobic concentric circular ring (4) along the direction shown by the arrow in the figure; then, repeating the processes of pinning, growing up, reaching the threshold of the characteristic liquid amount and continuing to spread; in this process, a precise quantification of the characteristic liquid volume of the droplets corresponding to the superhydrophobic concentric circles can be obtained. Meanwhile, due to the super-hydrophobicity of the concentric rings, the liquid-solid adhesion force at the position is extremely low, and low-residue efficient transfer can be realized in the quantitative liquid drop transfer process.
The utility model uses the needle head with the super-hydrophobicity concentric ring to drip out accurate quantitative liquid drops, which plays an important role in the fields of biological pharmacy, ink-jet printing, analysis and detection and the like. The use of the needle with the super-hydrophobic concentric ring can save the dosage of the liquid to be dripped, in particular the dosage of expensive medicines. The growth process of the liquid drops can be effectively pinned and regulated through concentric super-hydrophobic circular rings with different diameters, so that the accurate quantitative control of the liquid is realized; meanwhile, the super-hydrophobic circular ring has the characteristic of low adhesion to water-based liquid, the use of the super-hydrophobic structure is beneficial to liquid drops to leave the surface of the needle head, and the residue of the liquid drops on the surface of the needle head is effectively reduced; therefore, the concentric circular rings with super-hydrophobicity can be used for efficiently preparing various liquid drops with accurate quantification and realizing low-residue efficient transfer. In addition, compare in traditional syringe needle, use the syringe needle that has super hydrophobicity concentric ring can the liquid drop of the different liquid quantities of simultaneous quantitative preparation, reduce the complexity of changing the syringe needle in the different liquid quantities of production liquid drop process, can improve the production efficiency of liquid drop greatly.
The utility model has the following advantages:
according to the utility model, by adding the disc structure with the super-hydrophobic concentric ring at the position of the common flat-nose needle head, the gas, liquid and solid three-phase line pinning of extruded liquid drops at the position of the inner super-hydrophobic ring can be realized; only when the liquid drop volume is increased to a certain characteristic value, the liquid drop three-phase line can cross over the super-hydrophobic ring and continuously extend to the pinning position of the next outer super-hydrophobic ring; in turn, different amounts of droplets can be made. In addition, because the concentric rings have the super-hydrophobic characteristic, the adhesion force between the liquid drops and the substrate is greatly reduced, so that the liquid drops can easily fall off in the transfer process, and the difficulty and the liquid residue in the transfer process are reduced. The needle head with the super-hydrophobic concentric ring has the advantages of simple preparation and low cost, and can realize the efficient preparation and dripping of different quantitative liquid drops.
Drawings
FIG. 1 is a bottom view of a superhydrophobic concentric circular ring needle capable of accurately preparing a plurality of quantitative droplets;
FIG. 2 is a cross-sectional view of a super-hydrophobic concentric ring needle capable of precisely preparing a plurality of quantitative droplets;
FIG. 3 is a schematic view of the direction of liquid flow during the growth of a super-hydrophobic concentric ring needle droplet capable of accurately preparing a plurality of quantitative droplets.
Reference numerals:
1. a needle head; 11. a needle body; 12. a first liquid channel; 2. a superhydrophobic concentric disc; 21. a disc body; 22. a second liquid passage; 23. a set of annular channels; 231. a circular ring channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1-2, a super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative droplets comprises a needle 1 and a super-hydrophobic concentric disc 2 arranged at the front end of the needle 1 and perpendicular to the needle 1, wherein the needle 1 and the super-hydrophobic concentric disc 2 are of an integrated structure;
the needle head 1 is a hollow cylinder, and the needle head 1 comprises a needle head body 11 and a first liquid channel 12 arranged in the center of the needle head body 11;
the super-hydrophobic concentric disc 2 comprises a disc body 21 vertical to the needle body 11, a second liquid passage 22 arranged in the center of the disc body 21 and communicated with the first liquid passage 12, and a circular ring passage group 23 arranged on the disc body 21 and taking the axis of the second liquid passage 22 as the axis, wherein the disc body 21 is a cylinder, the disc body 21 and the needle body 11 are of an integrated structure, and the first liquid passage 12 and the second liquid passage 22 are through holes with the same diameter;
the circular ring channel group 23 comprises a plurality of circular ring channels 231 which are arranged from inside to outside, the circular ring channels 231 are circular ring groove structures with gaps, the inner wall of the innermost circular ring channel 231 and the surface of the second liquid channel 22 are the same curved surface, the directions of the gaps of the two adjacent circular ring channels 231 are opposite, the gaps are liquid flowing channels, the width of the circular ring channel 231 is smaller than the interval of the two circular ring channels 231, the diameter of the disc body 21 is larger than the thickness, and the circular ring channels 231 are subjected to super-hydrophobic modification; the super-hydrophobic modification is fluorinated super-hydrophobic modification, and the annular channel 231 is provided with a super-hydrophobic coating layer;
the needle head 1 and the super-hydrophobic concentric disc 2 are made of any one of the following materials: polytetrafluoroethylene, polyethylene terephthalate, polypropylene, aluminum, stainless steel.
Example 2
As shown in figures 1-2, a super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops is an innovative design aiming at the needle position of a conventional injection needle, and consists of a conventional transfusion needle 1 structure and a super-hydrophobic concentric disc 2, namely: adding a disc structure 2 at the outlet of a common flat-mouth needle 1, wherein the disc structure is provided with 5 super-hydrophobic concentric annular channels 231 with different diameters;
the structural parameters are as follows: the diameter of the outer wall of a needle body 11 of the needle 1 structure is
The inner wall (i.e., the first liquid passage 12) has a diameter of
Length of H1(1 mm-20 cm); super-hydrophobic concentricThe disc body 21 of the disc 2 has a thickness H1(0.2 mm-1 cm), the distance between the super-hydrophobic concentric circular channels 231 is W1(0.1 mm-2 mm) and a width W2(0.03 mm-1.0 mm), the diameters of the five super-hydrophobic concentric circular rings shown in figure 1 are sequentially from inside to outside
The diameter of the disc body 21 is
The method of use of examples 1-2 was: during the extrusion process, the liquid will be pinned at the ring channel group 23 in the superhydrophobic concentric disc 2, and the spreading along the surface of the needle 1 is limited; when the droplet grows to a certain characteristic threshold, the pinning effect of the ring channel group 23 cannot limit the spreading of the liquid, and the liquid passes through the gap (channel) of the ring channel 231, crosses the ring channel 231, and expands to the next ring channel 231 along the direction shown by the arrow in fig. 3; then, repeating the processes of pinning, growing up, reaching the threshold of the characteristic liquid amount and continuing to spread; in this process, a precise quantitative droplet of the characteristic liquid amount corresponding to the circular channel 231 can be obtained. Meanwhile, due to the super-hydrophobicity of the concentric rings, the liquid-solid adhesion force at the position is extremely low, and low-residue high-efficiency transfer can be realized in the quantitative liquid drop transfer process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the utility model concepts of the present invention in the scope of the present invention.
Claims (7)
1. The utility model provides a but super hydrophobicity concentric ring syringe needle of multiple quantitative liquid drop of accurate preparation which characterized in that: the device comprises a needle head (1) and a super-hydrophobic concentric disc (2) which is arranged at the front end of the needle head (1) and is vertical to the needle head (1), wherein the needle head (1) and the super-hydrophobic concentric disc (2) are of an integrated structure;
the needle head (1) is a hollow cylinder, and the needle head (1) comprises a needle head body (11) and a first liquid channel (12) arranged in the center of the needle head body (11);
the super-hydrophobic concentric disc (2) comprises a disc body (21) perpendicular to the needle body (11), a second liquid channel (22) arranged in the center of the disc body (21) and communicated with the first liquid channel (12), and a circular channel group (23) arranged on the disc body (21) and taking the axis of the second liquid channel (22) as the axis, wherein the disc body (21) is a cylinder, the disc body (21) and the needle body (11) are of an integrated structure, and the first liquid channel (12) and the second liquid channel (22) are through holes with the same diameter;
the ring channel group (23) comprises a plurality of ring channels (231) which are arranged from inside to outside, the ring channels (231) are of a ring groove structure with a notch, the innermost side is the inner wall of the ring channel (231) and the surface of the second liquid channel (22) is the same curved surface, the two adjacent ring channels are opposite in notch direction, and the notch is a liquid flowing channel.
2. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops according to claim 1, is characterized in that: the width of the circular ring channel (231) is smaller than the interval of the two circular ring channels (231).
3. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops as claimed in claim 1, wherein: the diameter of the disc body (21) is larger than the thickness.
4. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops according to claim 1, is characterized in that: the circular channel (231) is subjected to superhydrophobic modification.
5. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops according to claim 4, is characterized in that: the super-hydrophobic modification is fluorinated super-hydrophobic modification.
6. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops according to claim 1, is characterized in that: the ring channel (231) is provided with a super-hydrophobic coating layer.
7. The super-hydrophobic concentric ring needle capable of accurately preparing a plurality of quantitative liquid drops according to claim 1, is characterized in that: the needle head (1) and the super-hydrophobic concentric disc (2) are made of any one of the following materials: polytetrafluoroethylene, polyethylene terephthalate, polypropylene, aluminum, stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123419672.0U CN217016673U (en) | 2021-12-31 | 2021-12-31 | Super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123419672.0U CN217016673U (en) | 2021-12-31 | 2021-12-31 | Super-hydrophobic concentric ring needle head capable of accurately preparing various quantitative liquid drops |
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| CN217016673U true CN217016673U (en) | 2022-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006746A (en) * | 2022-12-28 | 2023-04-25 | 兰州高压阀门有限公司 | Drip tray for low-temperature valve |
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2021
- 2021-12-31 CN CN202123419672.0U patent/CN217016673U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006746A (en) * | 2022-12-28 | 2023-04-25 | 兰州高压阀门有限公司 | Drip tray for low-temperature valve |
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Effective date of registration: 20221114 Address after: Room 301, 3rd Floor, Building 2, Yard 9, Jiaogezhuang Street, Nanfaxin Town, Shunyi District, Beijing 101316 Patentee after: Beijing Yunchao Bionic Intelligence Technology Development Co.,Ltd. Address before: Building 5, Beilun Industrial Park, No. 13, Fengde Middle Road, Yongfeng base, Haidian District, Beijing 100094 Patentee before: Beijing bionic interface science and Technology Research Institute |