CN216213257U - High-voltage isolation structure of ionization ultraviolet lamp for ion transfer tube - Google Patents
High-voltage isolation structure of ionization ultraviolet lamp for ion transfer tube Download PDFInfo
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- CN216213257U CN216213257U CN202122837995.5U CN202122837995U CN216213257U CN 216213257 U CN216213257 U CN 216213257U CN 202122837995 U CN202122837995 U CN 202122837995U CN 216213257 U CN216213257 U CN 216213257U
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Abstract
The utility model discloses a high-voltage isolation structure of an ionization ultraviolet lamp for an ion transfer tube, which comprises a lamp sleeve with external threads, the ionization ultraviolet lamp, a glass optical window lantern ring for high-voltage isolation, a sealing ring and a repeller with a sealing groove. One end of the glass optical window lantern ring for high-voltage isolation is provided with a groove, an adhesive layer is arranged between the inner end face of the groove and the outer edge of the glass optical window of the ionization ultraviolet lamp, the inner end face of the groove, the outer edge of the glass optical window of the ionization ultraviolet lamp and part of lamp bodies of the ionization ultraviolet lamp are bonded and sealed through the adhesive layer, a new high-voltage isolation ionization ultraviolet lamp assembly is formed, and high-voltage isolation between a repelling electrode and a radio-frequency electrode plate on the ionization ultraviolet lamp is achieved. The high-voltage isolation structure of the ionization ultraviolet lamp for the ion transfer tube has the characteristics of good high-voltage resistance effect, high reliability, strong practicability and the like, and can effectively isolate and prevent high-voltage discharge between the repeller and the ionization ultraviolet lamp.
Description
Technical Field
The utility model relates to a non-radioactive lamp ionization source of ion mobility spectrometry, in particular to a high-voltage isolation structure of an ionization ultraviolet lamp for an ion mobility tube.
Background
Ion Mobility Spectrometry (IMS) is a technique for analyzing chemical substances by ionizing gas-phase molecules with an ionization source and by using the difference in migration velocity between different gas-phase ions in the same electric field, and has been widely used in the field for rapidly screening and detecting explosives, drugs, and toxicants.
The ionization ultraviolet lamp is a single photon ultraviolet light emission source, mainly comprising a lamp body, a light window and electrodes, wherein the lamp is vacuumized and then filled with inert gas, two symmetrical radio frequency electrode plates are attached to the outer wall of the lamp body of the ionization ultraviolet lamp, and the electrode plates are respectively led out by two wires and connected with a high-voltage radio frequency power supply; exciting by radio frequency high voltage to obtain ultraviolet light with the luminous energy of 8-12eV (about 150-110 nm); the glass optical window is made of magnesium fluoride material, can transmit ultraviolet light, and the propagation optical path of the ultraviolet light in the air is generally within 1 cm.
Organic matters in the air environment outside the glass optical window (generally, the ionization energy is 7-10eV, and for the organic matters with the ionization energy larger than 10eV, a dopant acetone with low ionization energy can be provided to assist ionization) are ionized into positive ions by ultraviolet light; the ion migration tube is internally provided with a repeller with a sealing groove, the repeller is connected to a direct-current positive high-voltage power supply of an ion migration spectrum through a lead, the voltage range is from positive 3 kilovolts to positive 1 kilovolt, and positive ion molecules are migrated and analyzed through an electric field formed by voltage.
Or, the organic matter in the air environment outside the glass optical window (usually, the ionization energy is 7-10eV, and for the organic matter with the ionization energy larger than 10eV, the low ionization energy dopant acetone can be provided to assist the ionization) is ionized into negative ions by ultraviolet light; the ion migration tube is internally provided with a repeller with a sealing groove, the repeller is connected to a direct current negative high-voltage power supply of the ion migration spectrum through a lead, the voltage range is between negative 3 kilovolts and negative 1 kilovolt, and negative ion molecules are migrated and analyzed through an electric field formed by voltage.
The inventor researches in the experimental process and finds that because the repeller is connected with a high-voltage power supply and has high voltage, two symmetrical radio-frequency electrode plates are attached to the outer wall of the lamp body of the ionization ultraviolet lamp, if the distance between the repeller and the radio-frequency electrode plates is too close (0.5-20mm) and impurity gas or humid gas exists between the repeller and the radio-frequency electrode plates, intermittent and continuous strong discharge occurs between the repeller and the radio-frequency electrode plates, the ionization ultraviolet lamp is damaged, and the ionization capacity of an instrument is damaged.
Gajiayi et al invented a method for assembling an ultraviolet lamp in an ion mobility spectrometry device and an ion mobility spectrometry device (patent No. ZL201210049161.0), wherein the ultraviolet lamp is horizontally arranged at the front end of an ionization region of an ion mobility tube, and an ionization channel with the width of 4mm is reserved in front of an ultraviolet window, so that the ionization region is kept complete and the movement direction of ions cannot be deviated when the ions pass through the ionization region.
The utility model discloses a radio frequency ionization excitation device of a vacuum ultraviolet lamp (patent number ZL201420732503.3) invented by plum sea and the like, and the radio frequency ionization excitation device of the vacuum ultraviolet lamp is designed, wherein a cavity of the vacuum ultraviolet lamp is filled with inert gas, and after the inert gas is ionized and broken down through the ionization excitation device, light with a specific wavelength can be emitted through a light window. The device has small volume and compact structure, and is suitable for ionization excitation of a vacuum ultraviolet lamp ionization source in an ion mobility spectrometer.
The utility model discloses an ion migration tube (patent No. ZL202023012576.X) capable of prolonging the service life of a photoionization source, and discloses an ion migration tube capable of prolonging the service life of the photoionization source, which comprises a vacuum ultraviolet lamp and an anti-reflection glass window, wherein the two components are coaxially arranged, ultraviolet light generated by the vacuum ultraviolet lamp is vertically emitted to the surface of the anti-reflection glass window, the vacuum ultraviolet lamp is isolated from an ionization region cavity of the migration tube by the anti-reflection glass window, and the anti-reflection glass is easy to replace, so that the effect of reducing the pollution of the vacuum ultraviolet lamp window is achieved.
The utility model discloses an integrated vacuum ultraviolet lamp ionization source differential ion mobility spectrometer (patent number ZL201611041188.x) invented by Liyang et al, which comprises a differential ion mobility spectrum, an ultraviolet lamp ionization source and a fixed groove, wherein all carrier gas between two parallel migration polar plates of the differential ion mobility spectrum horizontally enters the migration polar plates through a gas inlet, and all gas is completely discharged through a horizontal gas outlet, so that the sealing problem of the differential ion mobility spectrum is solved, the gas flow of the differential ion mobility spectrum is stable, and the detection reliability is ensured.
In summary, none of the above patents and prior art addresses the problem of high voltage discharge damage between an ionizing uv lamp and a repeller, and designs and solves the problem.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems, the utility model provides a high-voltage isolation structure of an ionization ultraviolet lamp for an ion transfer tube, which has the characteristics of good high-voltage resistance effect, high reliability, strong practicability and the like, and can effectively isolate and prevent high-voltage discharge between a repeller pair ionization ultraviolet lamp.
The technical scheme of the utility model is as follows:
the high-voltage isolation structure of the ionization ultraviolet lamp for the ion transfer tube comprises the ionization ultraviolet lamp, a glass optical window lantern ring for high-voltage isolation, a sealing ring and a repeller with a sealing groove;
the ionization ultraviolet lamp comprises an ionization ultraviolet lamp body, two symmetrical radio frequency electrode plates are attached to the outer wall of the ionization ultraviolet lamp body, and the electrode plates are respectively led out by two conducting wires and connected with a high-voltage radio frequency power supply; one end of the ionizing ultraviolet lamp body is provided with an ionizing ultraviolet lamp glass optical window, and the outer diameter of the ionizing ultraviolet lamp glass optical window is larger than that of the ionizing ultraviolet lamp body stuck with the symmetrical radio-frequency electrode plates;
one end of the glass optical window lantern ring for high-voltage isolation is provided with a groove, the inner diameter of the groove is slightly larger than the outer diameter of the glass optical window of the ionization ultraviolet lamp, the depth of the groove is larger than the thickness of the glass optical window of the ionization ultraviolet lamp, and the groove is used for being embedded into one end, provided with the glass optical window, of the ionization ultraviolet lamp; an adhesive layer is arranged between the inner end face of the groove and the outer edge of the glass optical window of the ionization ultraviolet lamp, one end of the ionization ultraviolet lamp, which is provided with the glass optical window, is inserted into the groove, the inner end face of the groove, the outer edge of the glass optical window of the ionization ultraviolet lamp and part of lamp bodies of the ionization ultraviolet lamp are bonded and sealed through the adhesive layer, the ionization ultraviolet lamp is bonded and fixed in a glass optical window sleeve ring for high-voltage isolation, a new high-voltage isolation ionization ultraviolet lamp assembly is formed, and high-voltage isolation between a repeller and a radio-frequency electrode plate on the ionization ultraviolet lamp is realized; the inner diameter of the lantern ring of the glass optical window for high-voltage isolation is equal to the inner diameter of the lamp body of the ionization ultraviolet lamp, so that ultraviolet light emitted from the glass optical window of the ionization ultraviolet lamp can pass through;
the other end of the glass optical window lantern ring for high-voltage isolation is tightly attached to a repeller with a sealing groove, a sealing ring is arranged at the attaching position, and the sealing ring is embedded into the sealing groove of the repeller; the repelling electrode with the sealing groove is led out by a lead wire, is connected to a direct current high-voltage power supply of the ion mobility spectrometry, and forms a high-voltage electric field by applying direct current high voltage.
Preferably, the high voltage isolation structure further comprises a lamp sleeve; the lamp sleeve is a hollow cylinder and is nested outside the ionization ultraviolet lamp body pasted with the symmetrical radio frequency electrode plates, and after the lamp sleeve is nested, the glass optical window of the ionization ultraviolet lamp and part of the lamp body adjacent to the glass optical window of the ionization ultraviolet lamp are positioned outside the lamp sleeve; the inner diameter of the lamp sleeve is slightly larger than the outer diameter of the ionization ultraviolet lamp pasted with the symmetrical radio-frequency electrode plates; the side surface of one end of the lamp sleeve adjacent to the glass light window of the ionization ultraviolet lamp is provided with external threads, and the side surface of the other end of the lamp sleeve is provided with two electrode wire leading-out holes for leading out wires connected with two symmetrical radio frequency electrode plates.
Preferably, the inner diameter of the lamp sleeve with the external threads is 0.1-3mm larger than the outer diameter of the ionization ultraviolet lamp attached with the symmetrical radio-frequency electrode plate.
Preferably, the inner diameter of the groove is 0.1-3mm larger than the outer diameter of the glass optical window of the ionization ultraviolet lamp.
Preferably, the depth of the groove is 0.5-20mm greater than the thickness of the glass light window of the ionizing ultraviolet lamp.
Preferably, the repeller with the sealing groove is connected to a direct current positive high voltage power supply of the ion mobility spectrometry through a lead wire, and the voltage range is between positive 3 kilovolts and positive 1 kilovolt.
Preferably, the repeller with the sealing groove is connected to a direct current negative high-voltage power supply of the ion mobility spectrometry through a lead, and the voltage range is negative 3 kilovolts to negative 1 kilovolt.
Preferably, the thickness of the glass optical window of the ionization ultraviolet lamp is 0.5-2 mm.
Preferably, the inner diameter of the sealing ring is 0.1-1mm larger than the inner diameter of the ionizing ultraviolet lamp body; the outer diameter of the sealing ring is 0.1-10mm smaller than the outer diameter of the screw thread of the lamp sleeve with the external screw thread.
Preferably, the repelling electrode with the sealing groove is a metallic material, such as stainless steel, such as iron, such as aluminum, such as copper, or the like.
Preferably, two symmetrical RF electrode plates made of metal, such as copper, such as aluminum, such as iron, are attached to the outer wall of the ionizing ultraviolet lamp body.
Preferably, the material of the glass optical window collar for high voltage isolation is an insulating material, such as tetrafluoroethylene, such as pek, such as ABS, such as nylon, such as Polyoxymethylene (POM), such as polyethylene, such as polycarbonate, etc.
Advantageous effects
The utility model provides a high-voltage isolation structure of an ionization ultraviolet lamp for an ion transfer tube, which is characterized in that a glass optical window lantern ring for high-voltage isolation is arranged, an adhesive layer is arranged between the inner end surface of a groove in the lantern ring and the outer edge of a glass optical window of the ionization ultraviolet lamp, the inner end surface of the groove, the outer edge of the glass optical window of the ionization ultraviolet lamp and part of lamp bodies of the ionization ultraviolet lamp are bonded and sealed through the adhesive layer, the ionization ultraviolet lamp is bonded and fixed in the glass optical window lantern ring for high-voltage isolation, a novel high-voltage isolation ionization ultraviolet lamp assembly is formed, high-voltage isolation between a repeller and a radio-frequency electrode plate on the ionization ultraviolet lamp is realized, and the high-voltage isolation structure has the characteristics of good high-voltage resistance effect, high reliability, strong practicability and the like, and can effectively isolate and prevent high-voltage discharge between the repeller and the ionization ultraviolet lamp.
Drawings
FIG. 1 is an exploded view of a high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube according to the present invention;
FIG. 2 is a schematic view of a prior art ionizing ultraviolet lamp assembly;
in the figure, 1-electrode wire leading-out hole; 2-a lamp sleeve; 3-lamp glass light window limiting groove; 4-symmetrical radio frequency electrode plates; 5-ionizing the ultraviolet lamp body; 6-ionizing ultraviolet lamp glass optical window; 7-glass optical window lantern ring for high voltage isolation; 8-sealing ring; 9-repeller with sealing slot; 10-external thread.
Detailed Description
Example 1
The high-voltage isolation structure of the ionization ultraviolet lamp for the ion transfer tube comprises a lamp sleeve 2 with external threads 10, the ionization ultraviolet lamp, a glass light window sleeve ring 7 for high-voltage isolation, a sealing ring 8 and a repeller 9 with a sealing groove.
The ionization ultraviolet lamp comprises a cylindrical ionization ultraviolet lamp body 5, and one end of the ionization ultraviolet lamp body 5 is a round ionization ultraviolet lamp glass light window 6; two symmetrical radio frequency electrode plates 4 are pasted on the outer wall of the ionization ultraviolet lamp body 5, and the electrode plates are respectively led out by two wires and connected with a high-voltage radio frequency power supply; the outer diameter of the glass light window 6 of the ionization ultraviolet lamp is larger than that of the lamp body 5 of the ionization ultraviolet lamp stuck with the symmetrical radio-frequency electrode slice 4.
The lamp sleeve 2 with the external threads is nested outside the ionization ultraviolet lamp body 5 pasted with the symmetrical radio frequency electrode plates 4, and after the lamp sleeve 2 is nested, the glass optical window 6 of the ionization ultraviolet lamp and part of the lamp body adjacent to the glass optical window 6 of the ionization ultraviolet lamp are positioned outside the lamp sleeve 2; the inner diameter of the lamp sleeve 2 is slightly larger than the outer diameter of the ionization ultraviolet lamp pasted with the symmetrical radio frequency electrode plates 4; the external thread 10 is positioned on the side surface of one end of the lamp sleeve 2 adjacent to the glass light window 6 of the ionization ultraviolet lamp, and the end surface of the other side of the lamp sleeve 2 with the external thread is provided with two electrode wire leading-out holes 1.
One end of the glass optical window lantern ring 7 for high-voltage isolation is provided with a circular groove, the inner diameter of the groove is slightly larger than the outer diameter of the glass optical window 6 of the ionization ultraviolet lamp, the depth of the groove is larger than the thickness of the glass optical window 6 of the ionization ultraviolet lamp, and the groove is used for embedding one end, provided with the glass optical window, of the ionization ultraviolet lamp; an adhesive layer (namely the thickened part of the line in figure 1) is arranged between the inner end face of the groove and the outer edge of the glass optical window 6 of the ionization ultraviolet lamp, one end of the ionization ultraviolet lamp, which is provided with the glass optical window, is inserted into the groove, the inner end face of the groove, the outer edge of the glass optical window 6 of the ionization ultraviolet lamp and part of lamp bodies of the ionization ultraviolet lamp are bonded and sealed through the adhesive layer, and the ionization ultraviolet lamp is bonded and fixed in a glass optical window lantern ring 7 for high-voltage isolation, so that a new high-voltage isolation ionization ultraviolet lamp assembly is formed, and high-voltage isolation between a repeller and a radio-frequency electrode plate on the ionization ultraviolet lamp is realized; the inner diameter of the glass light window lantern ring 7 for high-voltage isolation is equal to the inner diameter of the ionization ultraviolet lamp body 5, and ultraviolet light emitted from the glass light window 6 of the ionization ultraviolet lamp passes through the glass light window lantern ring.
The other end of the glass optical window lantern ring 7 for high-voltage isolation is tightly attached to a repeller 9 with a sealing groove, a sealing ring 8 is arranged at the attaching position, and the sealing ring 8 is embedded into the sealing groove of the repeller; the repeller 9 with the sealing groove is led out by a lead wire, is connected to a direct current high voltage power supply of the ion mobility spectrometry, and forms a high voltage electric field by applying direct current high voltage.
Wherein the content of the first and second substances,
the inner diameter of the lamp sleeve 2 with external threads is 0.1mm larger than the outer diameter of the ionization ultraviolet lamp attached with the symmetrical radio-frequency electrode plate 4;
the glass light window lantern ring 7 for high-voltage isolation is provided with a circular groove, and the inner diameter of the groove is 0.1mm larger than the outer diameter of the glass light window 6 of the ionization ultraviolet lamp;
the glass light window lantern ring 7 for high-voltage isolation is provided with a circular groove, and the depth of the groove is 0.5mm greater than the thickness of the glass light window 6 of the ionization ultraviolet lamp;
the repeller 9 with the sealing groove is connected to a direct current positive high voltage power supply of the ion mobility spectrometry through a lead, and the voltage range is positive 3 kilovolts;
the repeller 9 with the sealing groove is connected to a direct current negative high-voltage power supply of the ion mobility spectrometry through a lead, and the voltage range is minus 1 ten thousand volts;
the thickness of the glass optical window 6 of the ionization ultraviolet lamp is 1.2 mm;
the inner diameter of the sealing ring 8 is 0.1mm larger than the inner diameter of the ionizing ultraviolet lamp body 5; the outer diameter of the seal ring 8 is 10mm smaller than the outer diameter of the screw thread of the lamp sleeve 2 with external screw thread
The repeller 9 with the sealing groove is made of stainless steel;
two symmetrical radio frequency electrode plates 4 are pasted on the outer wall of the ionization ultraviolet lamp body 5, and the material of the electrode plates is copper;
the glass light window lantern ring 7 for high-voltage isolation is made of insulating material tetrafluoroethylene;
the lamp sleeve 2 is made of an insulating material, such as tetrafluoroethylene, e.g., picket, etc., and has an external thread.
Claims (10)
1. The high-voltage isolation structure of the ionization ultraviolet lamp for the ion transfer tube is characterized by comprising the ionization ultraviolet lamp, a glass optical window lantern ring for high-voltage isolation, a sealing ring and a repelling electrode with a sealing groove;
the ionization ultraviolet lamp comprises an ionization ultraviolet lamp body, two symmetrical radio frequency electrode plates are attached to the outer wall of the ionization ultraviolet lamp body, and the electrode plates are respectively led out by two wires and connected with a high-voltage radio frequency power supply; one end of the ionizing ultraviolet lamp body is provided with an ionizing ultraviolet lamp glass optical window, and the outer diameter of the ionizing ultraviolet lamp glass optical window is larger than that of the ionizing ultraviolet lamp body stuck with the symmetrical radio-frequency electrode plates;
one end of the glass optical window lantern ring for high-voltage isolation is provided with a groove, the inner diameter of the groove is slightly larger than the outer diameter of the glass optical window of the ionization ultraviolet lamp, the depth of the groove is larger than the thickness of the glass optical window of the ionization ultraviolet lamp, and the groove is used for being embedded into one end, provided with the glass optical window, of the ionization ultraviolet lamp; an adhesive layer is arranged between the inner end face of the groove and the outer edge of the glass optical window of the ionization ultraviolet lamp, and the inner end face of the groove, the outer edge of the glass optical window of the ionization ultraviolet lamp and part of lamp bodies of the ionization ultraviolet lamp are bonded and sealed through the adhesive layer; the inner diameter of the high-voltage isolation glass optical window lantern ring is equal to the inner diameter of the ionization ultraviolet lamp body, and ultraviolet light emitted from the glass optical window of the ionization ultraviolet lamp passes through the high-voltage isolation glass optical window lantern ring;
the other end of the high-voltage isolation glass optical window lantern ring is tightly attached to a repelling electrode with a sealing groove, a sealing ring is arranged at the attaching position, and the sealing ring is embedded into the sealing groove of the repelling electrode; the repelling electrode with the sealing groove is led out by a lead and is connected to a direct-current high-voltage power supply of the ion mobility spectrometry.
2. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the high voltage isolation structure further comprises a lamp sleeve; the lamp sleeve is a hollow cylinder and is nested outside the ionization ultraviolet lamp body pasted with the symmetrical radio frequency electrode plates, and after the lamp sleeve is nested, the glass optical window of the ionization ultraviolet lamp and part of the lamp body adjacent to the glass optical window of the ionization ultraviolet lamp are positioned outside the lamp sleeve; the inner diameter of the lamp sleeve is slightly larger than the outer diameter of the ionization ultraviolet lamp pasted with the symmetrical radio-frequency electrode plates; the side surface of one end of the lamp sleeve adjacent to the glass light window of the ionization ultraviolet lamp is provided with external threads, and the side surface of the other end of the lamp sleeve is provided with two electrode wire leading-out holes for leading out wires connected with two symmetrical radio frequency electrode plates.
3. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 2, wherein: the inner diameter of the lamp sleeve is 0.1-3mm larger than the outer diameter of the ionization ultraviolet lamp attached with the symmetrical radio-frequency electrode slice.
4. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the inner diameter of the groove is 0.1-3mm larger than the outer diameter of the glass optical window of the ionization ultraviolet lamp.
5. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the depth of the groove is 0.5-20mm greater than the thickness of the glass optical window of the ionization ultraviolet lamp.
6. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the repeller with the sealing groove is connected to a direct current positive high-voltage power supply of the ion mobility spectrometry through a lead.
7. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the repeller with the sealing groove is connected to a direct current negative high-voltage power supply of the ion mobility spectrometry through a lead.
8. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the thickness of the glass optical window of the ionization ultraviolet lamp is 0.5-2 mm.
9. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the inner diameter of the sealing ring is 0.1-1mm larger than the inner diameter of the ionizing ultraviolet lamp body; the outer diameter of the sealing ring is 0.1-10mm smaller than the outer diameter of the screw thread of the lamp sleeve with the external screw thread.
10. The high voltage isolation structure of an ionizing ultraviolet lamp for an ion transfer tube of claim 1, wherein: the repeller with the sealing groove and the two symmetrical radio-frequency electrode plates are made of metal materials, and the metal materials are one of stainless steel, iron, aluminum and copper; the glass optical window lantern ring for high-voltage isolation is made of an insulating material, and the insulating material is one of tetrafluoroethylene, pick, ABS, nylon, polyoxymethylene, polyethylene and polycarbonate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122837995.5U CN216213257U (en) | 2021-11-18 | 2021-11-18 | High-voltage isolation structure of ionization ultraviolet lamp for ion transfer tube |
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| CN202122837995.5U CN216213257U (en) | 2021-11-18 | 2021-11-18 | High-voltage isolation structure of ionization ultraviolet lamp for ion transfer tube |
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| CN216213257U true CN216213257U (en) | 2022-04-05 |
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