CN111879755B - A dynamic DBD detection device for syringes - Google Patents
A dynamic DBD detection device for syringes Download PDFInfo
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- CN111879755B CN111879755B CN202010893344.5A CN202010893344A CN111879755B CN 111879755 B CN111879755 B CN 111879755B CN 202010893344 A CN202010893344 A CN 202010893344A CN 111879755 B CN111879755 B CN 111879755B
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- tube
- mixing tube
- air inlet
- base
- capillary
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- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 238000005485 electric heating Methods 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 239000000523 sample Substances 0.000 claims description 38
- 239000007789 gas Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 12
- 239000012488 sample solution Substances 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000002737 fuel gas Substances 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 230000003446 memory effect Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/66—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
- G01N21/67—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence using electric arcs or discharges
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- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a dynamic DBD detection device for a needle cylinder, which relates to the technical field of detection devices, wherein a needle electrode is arranged on the inner side of the upper part of a mixing tube, an outer electrode is arranged on the outer side of the upper part of the mixing tube, an air outlet pipe is arranged on one side of the upper part of the mixing tube, two branch pipes are respectively arranged on two sides of the lower part of the mixing tube, a capillary tube is arranged in a sample inlet pipe, the sample inlet pipe penetrates through the branch pipes to extend into the mixing tube, a base is arranged at the bottom of the mixing tube, two side air inlet pipes are respectively arranged on two sides of the base and are communicated with the inside of the mixing tube, a fairing is arranged in the middle of the upper end of the base, a main air inlet pipe is arranged at the bottom of the base and is communicated with the inside of the mixing tube through the main air inlet channel, an electric heating wire is arranged between the two branch pipes, and two ends of the bottom of the electric heating wire penetrate through the base to extend to the outside. The device improves the stability of sample injection, avoids the discharge phenomenon in the air, and improves the accuracy of equipment.
Description
Technical Field
The invention relates to the technical field of detection devices, in particular to a dynamic DBD detection device for a needle cylinder.
Background
In the existing detection device, the sample injection mode is to drop liquid onto a tungsten wire, spectrum is generated after gas is evaporated by electric heating, the problem of non-uniform liquid feeding exists, and a dielectric barrier discharge mode with a ring-ring structure is adopted, so that a discharge phenomenon is easy to occur in air. In the prior art, the liquid can be attached to the inner wall of the quartz tube in the liquid introduction process, and a memory effect is generated for a long time, so that the accuracy of the equipment is reduced. The traditional air inlet mode only introduces one path of gas, the path of gas is used as sample carrier gas and is also plasma fuel gas, the carrier gas flow rate cannot be controlled independently, and the carrier gas flow rate can be regulated only according to the gas quantity required by igniting plasma, so that the sample carrier gas speed is too high.
Disclosure of Invention
In order to solve the technical problems, the invention provides the dynamic DBD detection device for the needle cylinder, which improves the stability of sample injection, avoids the discharge phenomenon in the air and improves the accuracy of equipment.
In order to achieve the above object, the present invention provides the following solutions:
The invention provides a dynamic DBD detection device for a needle cylinder, which comprises a mixing tube, a base, a fairing, an electric heating wire, needle electrodes, an outer electrode, a sampling tube, a capillary tube, a main air inlet tube and two side air inlet tubes, wherein the needle electrodes are arranged on the inner side of the upper part of the mixing tube, the outer electrode is arranged on the outer side of the upper part of the mixing tube, one side of the upper part of the mixing tube is provided with an air outlet tube, two sides of the lower part of the mixing tube are respectively provided with a branch tube, the capillary tube is arranged in the sampling tube, the sampling tube penetrates through one branch tube to extend into the mixing tube, the base is arranged at the bottom of the mixing tube, the two side air inlet tubes are respectively arranged on two sides of the base, the two side air inlet tubes are respectively communicated with the inside of the mixing tube, the fairing is arranged in the middle of the upper end of the base, the main air inlet tube is provided with a main air inlet channel, the main air inlet tube is communicated with the inside the mixing tube through the main air inlet channel, the main air inlet tube is used for introducing samples into the air inlet tube, the sample is used for introducing the sample, and the sample is used for introducing the gas, and the sample is arranged between the two ends of the electric heating wire and the two ends of the heating wire are respectively penetrated through the base.
Preferably, the fairing includes from top to bottom reverse taper section and cylinder section that connects gradually, main air inlet channel runs through reverse taper section with the cylinder section, base upper end middle part is provided with the recess, the cylinder section install in the recess.
Preferably, two side air inlet channels are symmetrically arranged on two sides of the base, the side air inlet channels are L-shaped channels, one end of each L-shaped channel is connected with the side air inlet pipe, the other end of each L-shaped channel is communicated with the mixing pipe, and one end of each L-shaped channel communicated with the mixing pipe is located below the inverted cone section.
Preferably, the mixing tube comprises a first circular tube, a conical tube and a second circular tube which are sequentially connected from top to bottom, the inner diameter of the first circular tube is smaller than that of the second circular tube, the outer electrode is arranged on the outer side of the first circular tube, the air outlet tube is arranged on one side of the upper portion of the first circular tube, and the two branch tubes are respectively arranged on two sides of the second circular tube.
Preferably, a fixed plug is arranged at the top of the mixing tube, and the needle electrode penetrates through the fixed plug and extends into the mixing tube.
Preferably, the outer end of the branch pipe is provided with a sample injection plug, and the sample injection pipe penetrates through one sample injection plug and one branch pipe to extend into the mixing pipe.
Preferably, the outer electrode is a copper wire or a copper sheet, and the copper wire is wound on the outer side of the upper part of the mixing tube or the copper sheet is wrapped on the outer side of the upper part of the mixing tube.
Preferably, the electric heating wire is a tungsten wire, the mixing tube is a quartz tube, and the capillary tube is a wiredrawing capillary tube.
Compared with the prior art, the invention has the following technical effects:
The needle electrode and the outer electrode form a dielectric barrier discharge form of a needle-ring structure, and compared with the dielectric barrier discharge form of the ring-ring structure, the dielectric barrier discharge form of the needle-ring structure avoids the discharge phenomenon in the air. The electric spray gasification is realized by matching with the capillary tube and the electric heating wire, the sample solution flows through the capillary tube and enters the mixing tube, a high-voltage electric field is added in the sample solution of the capillary tube, the sample solution can be atomized into fine mist droplets with charges at the outlet of the capillary tube under the action of coulomb force and uniformly sprayed on the surface of the electric heating wire, and the electric heating wire discharges the gas on the surface from the top air outlet tube after electric heating. The gas is guided on the inner wall of the pipe by the fairing to form a gas curtain, so that a protective effect is formed on the pipe wall, pollution caused by liquid drops sputtering to the pipe wall is prevented, memory effect is avoided, and the accuracy of the equipment is improved. The main air inlet pipe is used for introducing sample carrier gas, the side air inlet pipe is used for introducing plasma fuel gas, and the flow speed of the sample carrier gas can be independently controlled, so that the sample cannot flow through the plasma region too fast.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a dynamic DBD detection device for a syringe according to the present invention;
Fig. 2 is a sectional view of the dynamic DBD detection device for a syringe provided by the present invention.
The reference numerals are 1, a first circular tube, 2, a conical tube, 3, a second circular tube, 4, a fixed plug, 5, a needle electrode, 6, an air outlet tube, 7, a branch tube, 8, a sample injection plug, 9, a sample injection tube, 10, a capillary tube, 11, an electric heating wire, 12, a base, 13, a fairing, 14, a main air inlet channel, 15, a main air inlet tube, 16, a side air inlet tube, 17 and a side air inlet channel.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide the dynamic DBD detection device for the needle cylinder, which improves the stability of sample injection, avoids the discharge phenomenon in the air and improves the accuracy of equipment.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 and 2, the present embodiment provides a dynamic DBD detection device for a syringe, including a mixing tube, a base 12, a fairing 13, an electric heating wire 11, a needle electrode 5, an outer electrode, a sampling tube 9, a capillary tube 10, a main air inlet tube 15 and two side air inlet tubes 16, wherein the needle electrode 5 is disposed inside the upper portion of the mixing tube, and the outer electrode is disposed outside the upper portion of the mixing tube, so as to form a dielectric barrier discharge form of a needle-ring structure, specifically, the outer electrode is cylindrical, the cylindrical outer electrode is sleeved outside the needle electrode 5, the needle electrode and the outer electrode are coaxial, the outer electrode and the needle electrode are grounded, and the needle electrode 5 is connected to ac high voltage, so that compared with the dielectric barrier discharge form of the ring-ring structure, a discharge phenomenon in air is avoided. An air outlet pipe 6 is arranged at one side of the upper part of the mixing pipe, two branch pipes 7 are respectively arranged at two sides of the lower part of the mixing pipe, a capillary 10 is arranged in a sample inlet pipe 9, the capillary 10 extends out from two ends of the sample inlet pipe 9, the sample inlet pipe 9 extends into the mixing pipe through one branch pipe 7, a sample solution flows through the capillary 10 and enters the mixing pipe, a high-voltage electric field is added in the sample solution of the capillary tube 10, the sample solution is sprayed at the outlet of the capillary tube 10 under the action of coulomb force, and the atomized fine mist droplets with charges are uniformly sprayed on the surface of the electric heating wire 11, namely, the sample solution is uniformly sprayed by adopting an electric spray sample feeding mode in the application.
The base 12 is arranged at the bottom of the mixing tube, the two side air inlet pipes 16 are respectively arranged at two sides of the base 12, the two side air inlet pipes 16 are communicated with the inside of the mixing tube, the fairing 13 is arranged in the middle of the upper end of the base 12, the fairing 13 guides gas to form an air curtain on the inner wall of the tube, a protective effect is formed on the wall of the tube, liquid drops are prevented from being sputtered to the wall of the tube to cause pollution, a memory effect is avoided, and the accuracy of the device is improved. The main air inlet channel 14 is arranged in the fairing 13, the main air inlet pipe 15 is arranged at the bottom of the base 12, the main air inlet pipe 15 is communicated with the inside of the mixing pipe through the main air inlet channel 14, the main air inlet pipe 15 is used for introducing sample carrier gas, the sample carrier gas is used for purging the electric heating wire 11, the side air inlet pipe 16 is used for introducing plasma gas, and the plasma gas is used for igniting plasma. By separating the plasma gas from the sample carrier gas, the sample carrier gas flow rate can be independently controlled so that the sample does not flow through the plasma region too fast. The electric heating wire 11 is arranged between the two branch pipes 7, and both ends of the bottom of the electric heating wire 11 penetrate through the base 12 to extend to the outside.
Specifically, the fairing 13 includes a reverse taper section and a cylindrical section that are sequentially connected from top to bottom, the main air inlet channel 14 penetrates through the reverse taper section and the cylindrical section, a groove is formed in the middle of the upper end of the base 12, the cylindrical section is installed in the groove, and the cylindrical section is in threaded connection or clamped connection in the groove. The electric heating wire 11 is located above the main air inlet channel 14, and sample carrier gas is introduced to gasify the sample solution more effectively and protect the surface of the electric heating wire 11 from memory effect.
Specifically, two side air intake channels 17 are symmetrically arranged on two sides of the base 12, the side air intake channels 17 are L-shaped channels, one end of each L-shaped channel is connected with the side air intake pipe 16, and the other end of each L-shaped channel is communicated with the mixing pipe, namely, one side air intake pipe 16 is communicated with the mixing pipe through one L-shaped channel. One end of the L-shaped channel communicated with the mixing tube is positioned below the inverted cone section, so that plasma fuel gas entering from the side gas inlet tube 16 through the L-shaped channel is dispersed along the inverted cone surface to two sides, an air curtain wrapping the inner wall of the mixing tube is formed, tiny liquid drops are prevented from being sputtered into the tube wall, and meanwhile, the effects of protecting the tube wall and preventing pollution are achieved.
Specifically, the hybrid tube includes from top to bottom first pipe 1, conical tube 2 and second pipe 3 that connect gradually, and the internal diameter of first pipe 1 is less than the internal diameter of second pipe 3, and outside electrode sets up in first pipe 1 outside, and outlet duct 6 sets up in one side on first pipe 1 upper portion, and two branch pipes 7 set up respectively in the both sides of second pipe 3, and base 12 installs in second pipe 3 bottom.
The top of the mixing tube is provided with a fixed plug 4, the needle electrode 5 passes through the fixed plug 4 and extends into the mixing tube, and the fixed plug 4 has a fixed limiting function on the needle electrode 5. Specifically, the fixing plug 4 is mounted on the top of the first circular tube 1, and the needle electrode 5 is disposed in the first circular tube 1.
The outer end of the branch pipe 7 is provided with a sample injection plug 8, the sample injection pipe 9 penetrates through the sample injection plug 8 and the branch pipe 7 to extend into the mixing pipe, and the sample injection plug 8 has a fixed limiting effect on the sample injection pipe 9.
In this embodiment, the outer electrode is a copper wire or a copper sheet, and the copper wire or the copper sheet is wrapped around the outer side of the upper portion of the mixing tube.
In this embodiment, the electric heating wire 11 is a tungsten wire, the mixing tube is a quartz tube, and the capillary tube 10 is a wire drawing capillary tube.
Therefore, in this embodiment, the electrospray sample injection and the needle-ring structure are mutually matched, the sample solution is atomized into fine mist droplets with charges by the capillary 10 and high voltage electricity in the sample injection tube 9, and then sprayed on the surface of the electric heating wire 11, and the electric heating wire 11 discharges the gas on the surface from the top gas outlet tube 6 after electric heating. The base 12 is divided into two paths of air inlet, one path is in the middle and is used for carrying a sample, so that the gas on the electric heating wire 11 can be better purged, the sample injection speed of the sample can be independently controlled, and the other path is at two sides of the base 12, plasma gas enters the periphery of the inner pipe wall of the mixing pipe to form an air curtain, so that the flow speed can be independently regulated, the gas can be provided for the plasma, and meanwhile, the effects of protecting the pipe wall and preventing pollution are achieved.
The principles and embodiments of the present invention have been described in detail in this application, the above examples are provided to facilitate understanding of the method of the present invention and its core ideas, and modifications may be made by those skilled in the art in light of the present teachings, both in the detailed description and the application scope. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893344.5A CN111879755B (en) | 2020-08-31 | 2020-08-31 | A dynamic DBD detection device for syringes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893344.5A CN111879755B (en) | 2020-08-31 | 2020-08-31 | A dynamic DBD detection device for syringes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111879755A CN111879755A (en) | 2020-11-03 |
| CN111879755B true CN111879755B (en) | 2025-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010893344.5A Active CN111879755B (en) | 2020-08-31 | 2020-08-31 | A dynamic DBD detection device for syringes |
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| Country | Link |
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| CN (1) | CN111879755B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477852A (en) * | 2014-12-07 | 2015-04-01 | 深圳市信诚高科科技开发有限公司 | Modularized plate-type ozone generator |
| CN110308119A (en) * | 2018-03-20 | 2019-10-08 | 中国科学院沈阳自动化研究所 | A current-carrying laser-induced breakdown spectroscopy on-line composition analyzer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845041A (en) * | 1985-11-20 | 1989-07-04 | Analyte Corporation | Atomic-absorption sputtering chamber and system |
| EP3693733B1 (en) * | 2015-03-06 | 2022-09-07 | Mécanique Analytique Inc. | Discharge-based photo ionisation detector for use with a gas chromatography system |
| CN109856231B (en) * | 2019-02-27 | 2021-06-11 | 苏州大学 | Multi-channel high-flux composite ionization device |
| CN212658624U (en) * | 2020-08-31 | 2021-03-05 | 中节能天融科技有限公司 | Be used for cylinder developments DBD detection device |
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2020
- 2020-08-31 CN CN202010893344.5A patent/CN111879755B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477852A (en) * | 2014-12-07 | 2015-04-01 | 深圳市信诚高科科技开发有限公司 | Modularized plate-type ozone generator |
| CN110308119A (en) * | 2018-03-20 | 2019-10-08 | 中国科学院沈阳自动化研究所 | A current-carrying laser-induced breakdown spectroscopy on-line composition analyzer |
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| CN111879755A (en) | 2020-11-03 |
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