CN110596291A - Hydrogen flame ionization detector - Google Patents
Hydrogen flame ionization detector Download PDFInfo
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- CN110596291A CN110596291A CN201911002428.9A CN201911002428A CN110596291A CN 110596291 A CN110596291 A CN 110596291A CN 201911002428 A CN201911002428 A CN 201911002428A CN 110596291 A CN110596291 A CN 110596291A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000001257 hydrogen Substances 0.000 title claims abstract description 33
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 77
- 238000007664 blowing Methods 0.000 claims abstract description 27
- 239000012159 carrier gas Substances 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 66
- 238000002485 combustion reaction Methods 0.000 claims description 43
- 238000004321 preservation Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 10
- 238000005219 brazing Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004021 metal welding Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
- G01N30/68—Flame ionisation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/025—Gas chromatography
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a hydrogen flame ionization detector, comprising: the device comprises a detector chamber, an ignition wire component, a collector, a signal output component, a combustion-supporting gas input channel, a nozzle, a polarized electrode component, a carrier gas input channel and a gas/tail blowing input channel, wherein the collector is positioned below the ignition wire component and in the detector chamber; the hydrogen flame ionization detector disclosed by the invention is convenient to disassemble and high in collection efficiency.
Description
Technical Field
The invention relates to the technical field of gas chromatographs, in particular to a hydrogen flame ionization detector.
Background
A Flame Ionization Detector (FID) is one of the commonly used detectors for gas chromatographs, and it uses Flame generated by combustion of hydrogen and air as an energy source, and is a typical destructive, quality type Detector; the specific principle is as follows: when organic compound sample components enter a burning flame, ionization is generated at high temperature, ion flow is formed under the action of directional force of a high-voltage electric field, the ion flow is collected by a collector, amplified by an amplifying circuit, an electric signal in direct proportion to the organic matter amount can be obtained, and the electric signal is collected by an AD (analog-to-digital) collecting module and recorded on a recorder, so that quantitative analysis can be carried out; the FID has the advantages of response to almost all volatile organic compounds, high sensitivity, small base flow, wide linear range, small dead volume and quick response.
In the prior art, the FID mainly has the following problems: 1. the high-voltage connector and the polarized component need to be installed in a heat-insulating shell with limited space; moreover, one end of the combustible mixed gas pipeline and one end of the combustion-supporting gas pipeline enter the heat-insulating shell from two directions, and the other end of the combustible mixed gas pipeline needs to be subjected to rapid direction change in a limited space and then is installed in a corresponding installation hole position of the column box, so that the installation and the maintenance are very inconvenient; 2. the collector is communicated with the signal output assembly by adopting a metal rod, and the contact area between the metal rod and the collector is small, so that the collection efficiency is low and the signal is unstable; 3. a combustion chamber base welding part adopts a plurality of machining parts and sheet metal parts to be welded into an integral part, relates to various welding processes such as vacuum brazing, resistance spot welding, argon arc welding and the like, and has complex manufacturing process and high production cost, so a method capable of solving the problems needs to be found.
Disclosure of Invention
In view of the above, there is a need to overcome at least one of the above-mentioned deficiencies in the prior art, and the present invention provides a hydrogen flame ionization detector comprising: the device comprises a detector cavity, an ignition wire component, a collector, a signal output component, a combustion-supporting gas input channel, a nozzle, a polarization electrode component, a carrier gas input channel and a gas/tail blowing input channel, wherein the collector is positioned below the ignition wire component and in the detector cavity; the detector chamber is a vertical channel, the ignition wire assembly is arranged in an ignition pipeline which is positioned on the side wall of the vertical channel and communicated with the detector chamber, the signal output assembly, the combustion-supporting gas input channel, the polarization pole assembly and the gas/tail gas blowing input channel are all positioned on the side wall of the vertical channel, one end pole of the polarization assembly extends into the vertical channel and is communicated with the nozzle, and the other end of the polarization pole assembly extends out of the vertical channel and is used for wiring; the carrier gas input channel is located at the bottom of the vertical channel.
According to the background art, the conventional hydrogen flame ionization detector is inconvenient to install and maintain; low collection efficiency and unstable signals; the welding part of the combustion chamber base relates to various welding processes such as vacuum brazing, resistance spot welding, argon arc welding and the like, the manufacturing process is complex, and the production cost is high; the hydrogen flame ionization detector disclosed by the invention has the advantages of small FID size, reasonable structural design and convenience in assembly and disassembly; the FID main body part can be assembled outside the heat preservation box body and then integrally installed in the heat preservation box body; and moreover, the collector is communicated with the signal output assembly through the connecting wire, the end part of the connecting wire can be wound into a ring shape, and then the ring-shaped structure and the collector are assembled, so that the contact area between the connecting wire and the collector is increased, and the collection efficiency is improved.
In addition, the hydrogen flame ionization detector disclosed by the invention also has the following additional technical characteristics:
furthermore, the collector is connected with the signal output assembly through the connecting wire, one end of the connecting wire is fixed on the signal output assembly, the other end of the connecting wire is of an annular structure, and the annular structure is fixed on the collector.
Furthermore, the collector has a collector main body which is in a cylindrical shape and a flange structure which is positioned on the outer peripheral surface of the collector main body, the flange structure is connected with the collector main body in an integrated forming mode, and the annular structure is sleeved outside the collector main body and is in surface contact with the upper surface of the flange structure.
One end of the connecting wire is wound into an annular structure, and the annular structure is in surface contact with the upper surface of the flange structure, so that the contact area between the connecting wire and the collecting electrode is increased, the collecting efficiency is improved, and the collected signal is more stable.
Further, the connection wire is a wire made of a gold-plated probe or a silver wire.
Preferably, the connecting wire is a wire made of silver wire.
Further, the nozzle has a gas passage, and an outer wall of a lower end of the gas passage is mounted on an inner wall of a bottom of the vertical passage by a screw connection.
Further, the hydrogen flame ionization detector comprises an ignition seat, a collector electrode seat detachably mounted at the lower end of the ignition seat, and a combustion chamber welding part fixedly arranged at the lower end of the collector electrode seat through a fastener; the ignition seat, the collector seat and the combustion chamber welding piece are respectively provided with an ignition seat central through hole, a collector seat central through hole and a welding piece central through hole; the ignition seat central through hole, the collector seat central through hole and the welding part central through hole form the detector chamber; the ignition pipeline is located the ignition seat lateral wall, the collector is located in collector seat central through hole, the nozzle is located in welding piece central through hole, the polarization pole subassembly the gas/tail input channel of blowing and combustion-supporting gas input channel all is located on the lateral wall of combustion chamber welding piece, the carrier gas input channel passes through the cutting ferrule nut to be fixed the bottom of welding piece central through hole.
Furthermore, the central through hole of the welding part is composed of an upper section and a lower section, the cross-sectional area of the upper section is larger than that of the lower section, the collector pole seat is installed on the upper section, the lower end face of the ignition seat presses the annular structure on the flange structure through a first insulating gasket and is fixedly installed at the upper end of the collector pole seat through an ignition seat fixing nut, and therefore the annular structure is pressed on the flange structure.
Further, the polarized pole nut assembly has a high pressure fitting mounted on a sidewall of the combustion chamber weldment having a fitting through-hole, a polarized pole, and a polarized pole nut; the polarization pole is arranged in the joint through hole through an insulating sleeve; the high-voltage connector is arranged on the combustion chamber welding part, the high-voltage connector is connected with the high-voltage connector, the high-voltage.
Furthermore, the high-pressure joint, the gas/tail blowing input channel and the combustion-supporting gas input channel are welded on the side wall of the combustion chamber welding piece in a vacuum brazing mode.
Furthermore, the hydrogen flame ionization detector further comprises a heat preservation box body and a heat preservation box cover, wherein the heat preservation box cover is provided with a hole for extending the box cover extending out of the top of the combustion chamber welding piece, and the heat preservation box body is provided with a hole for extending out of the bottom of the combustion chamber welding piece.
Furthermore, the heat preservation box body is a sheet metal welding riveting piece.
Furthermore, the heat-insulating cotton is filled in the heat-insulating box body.
Further, the gas/tail blowing input channel and the combustion-supporting gas input channel are both positioned on the same side of the vertical channel.
Furthermore, a positioning angle structure is installed on the inner bottom surface of the heat preservation box body, a positioning surface which is correspondingly matched with the positioning angle structure is arranged on the side surface of the combustion chamber welding piece, and the positioning surface, the gas/tail blowing input channel and the combustion-supporting gas input channel are oppositely arranged or arranged on the same side.
Furthermore, a pipeline wire inlet and outlet is arranged on the side surface of the heat preservation box body, and when the positioning surface is arranged opposite to the gas/tail blowing input channel and the combustion-supporting gas input channel, the pipeline wire inlet and outlet is arranged opposite to the positioning angular structure; when the positioning surface is arranged on the same side of the gas/tail blowing input channel and the combustion-supporting gas input channel, the pipeline wire inlet and outlet are arranged on the same side of the positioning angle structure.
The main body of the welding part is composed of cylinder sections with different diameters, and a combustion-supporting gas pipeline, a high-pressure joint and a combustible gas and tail-blowing mixed gas pipeline are welded on one side of the main body in a vacuum brazing mode; and the side surface of the main body of the welding part is provided with a positioning surface, so that the main body of the welding part cannot rotate due to the matching of the positioning surface and the positioning angular structure in the process of mounting the main body of the welding part on the heat preservation box body, and one side of the main body of the welding part, which is provided with the gas/tail blowing input channel and the combustion-supporting gas input channel, is opposite to the inlet and outlet of the pipeline wire and then is mounted in a corresponding mounting hole position of a column box, thereby facilitating the mounting. Furthermore, the side of the upper end of the heat preservation box body is also provided with a box body flange, and the box body flange is provided with a mounting and fixing hole for mounting on a column box.
Furthermore, the hydrogen flame ionization detector further comprises a heating assembly arranged in the heat preservation box body, wherein the heating assembly comprises a heat conduction block which is arranged on the inner bottom surface of the heat preservation box body, is abutted to the combustion chamber welding piece and is used for providing heat for the detector chamber, a heating element which is arranged in the heat conduction block and is used for generating heat, and a temperature feedback element which is used for monitoring the temperature in real time.
Furthermore, the side structure of the heat conducting block connected with the combustion chamber welding part is the positioning angle structure matched with the positioning surface.
Furthermore, the inner bottom surface of the heat preservation box body is riveted with a nut post, and the heat conduction block is fixed on the inner bottom surface of the heat preservation box body through a fastener matched with the nut post.
Furthermore, the heating element and the lead of the temperature feedback element extend out of the pipeline wire inlet and outlet.
The heating component can be assembled and then fixed in the heat-insulating box body through the fastening piece.
The heating assembly is detachably arranged in the heat-insulating shell, the combustion chamber welding piece is detachably arranged on a heating block of the heating assembly, the collecting electrode seat is detachably arranged on the upper part of the combustion chamber welding piece, and the ignition wire assembly is detachably arranged on the upper part of the collecting electrode seat; the disassembly is convenient.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a prior art hydrogen flame ionization detector;
FIG. 2 is a schematic diagram of a hydrogen flame ionization detection configuration provided by the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic structural view of a nozzle provided in the present invention;
FIG. 5 is a schematic structural view of a combustor weldment provided by the present invention; and
fig. 6 is a schematic structural diagram of the heat preservation box provided by the invention.
The ignition device comprises an ignition wire assembly 1, an ignition seat 2, an ignition seat fixing nut 3, a collector 4, a collector seat 5, a first insulating gasket 6, a signal output assembly 7, a connecting lead 8, a second insulating gasket 9, a combustion chamber welding piece 10, a positioning surface 101, a combustion-supporting gas input channel 11, a heat preservation box cover 12, a heat preservation box body 13, an installation fixing hole 131, a pipeline wire inlet and outlet 132, a polarizing electrode 14, a high-voltage connector 15, a polarizing electrode nut 16, a nozzle 17, a gas channel 171, a thread 172, a heat conducting block 18, a temperature feedback element 19, a heating element 20, a gas/tail blowing input channel 21, a nut 22 and a carrier gas input channel clamping sleeve 23.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout; the embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The invention has the following conception that one end of the connecting wire is wound into an annular structure, and the annular structure is contacted with the collector face, so that the contact area between the connecting wire and the collector is increased, the collection efficiency is further improved, and the collected signal is more stable.
FIG. 1 is a schematic diagram of a prior art hydrogen flame ionization detector; FIG. 2 is a schematic diagram of a hydrogen flame ionization detection configuration provided by the present invention; FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2; FIG. 4 is a schematic structural view of a nozzle provided in the present invention; FIG. 5 is a schematic structural view of a combustor weldment provided by the present invention; and FIG. 6 is a schematic structural diagram of the heat preservation box provided by the invention.
As shown, according to an embodiment of the present invention, includes: the device comprises a detector cavity, an ignition wire component 1, a collector 4 which is positioned below the ignition wire component 1 and in the detector cavity, a signal output component 7 connected with the collector 4, a combustion-supporting gas input channel 11 which is positioned below the collector 4 and is communicated with the detector cavity, a nozzle 17 which is positioned below the combustion-supporting gas input channel 11 and is in the detector cavity, a polarized electrode component with one end contacted with the nozzle 17 and the other end used for wiring, a carrier gas input channel which is positioned below the nozzle 17 and is communicated with an inlet of the nozzle 17, and a gas/tail blowing input channel 21 which is positioned below the nozzle 17 and is communicated with the carrier gas input channel 23; the detector chamber is a vertical channel, the ignition wire assembly 1 is installed in an ignition pipeline which is positioned on the side wall of the vertical channel and communicated with the vertical channel, the signal output assembly 7, the combustion-supporting gas input channel 11, the polarized electrode assembly and the gas/tail blowing input channel 21 are all positioned on the side wall of the vertical channel, one end of the polarized electrode assembly extends into the vertical channel and is communicated with a nozzle, the other end of the polarized electrode assembly extends out of the vertical channel and is used for wiring, and the carrier gas input channel 23 is positioned at the bottom of the vertical channel.
According to the background art, the conventional hydrogen flame ionization detector is inconvenient to install and maintain; low collection efficiency and unstable signals; the welding part of the combustion chamber base relates to various welding processes such as vacuum brazing, resistance spot welding, argon arc welding and the like, the manufacturing process is complex, and the production cost is high; the hydrogen flame ionization detector disclosed by the invention has the advantages of small FID size, reasonable structural design and convenience in assembly and disassembly; the FID main body part can be assembled outside the heat preservation box body 13 and then integrally installed in the heat preservation box body 13; moreover, the collector 4 is conducted with the signal output assembly 7 through the connecting lead 8, the end portion of the connecting lead 8 can be wound into a ring shape, and then the ring-shaped structure and the collector 4 are assembled, so that the contact area between the connecting lead 8 and the collector 4 is increased, and the collecting efficiency is improved.
In addition, the hydrogen flame ionization detector disclosed by the invention also has the following additional technical characteristics:
according to some embodiments of the present invention, the collector 4 is connected to the signal output component 7 through the connection wire 8, one end of the connection wire 8 is fixed on the signal output component 7, and the other end is a ring structure fixed on the collector 4.
According to some embodiments of the present invention, the collector 4 has a cylindrical collector body and a flange structure on an outer circumferential surface of the collector body, the flange structure is integrally connected with the collector body, and the ring structure is sleeved outside the collector body and is in surface contact with an upper surface of the flange structure.
One end of the connecting wire 8 is wound into an annular structure, and the annular structure is in surface contact with the upper surface of the flange structure, so that the contact area between the connecting wire 8 and the collector 4 is increased, the collection efficiency is improved, and the collected signals are more stable.
According to some embodiments of the invention, the connecting wire 8 is a wire made of gold-plated probe or silver wire.
According to some embodiments of the invention, the connecting wire 8 is a wire made of silver wire.
According to some embodiments of the present invention, the nozzle 17 has a gas passage 171, and an outer wall of a lower end of the gas passage 171 is coupled to an inner wall of a bottom of the vertical passage by a screw 172.
According to some embodiments of the present invention, the hydrogen flame ionization detector comprises an ignition base 2, a collector base 5 detachably mounted on a lower end of the ignition base 2, and a combustion chamber weld 10 fixedly disposed on a lower end of the collector base 5 by a fastener; the ignition seat 2, the collector seat 5 and the combustion chamber welding piece 10 are respectively provided with an ignition seat central through hole, a collector seat central through hole and a welding piece central through hole; the ignition seat central through hole, the collector seat central through hole and the welding part central through hole form the detector chamber; ignition pipeline is located 2 lateral walls of ignition seat, the collector 4 is located in collector seat center through-hole, the nozzle 17 is located in welding piece center through-hole, the polarization pole subassembly the gas/tail input channel of blowing 21 and combustion-supporting gas input channel 11 all is located on the lateral wall of combustion chamber welding piece 10, carrier gas input channel 23 passes through cutting ferrule nut 22 to be fixed the bottom of welding piece center through-hole.
According to some embodiments of the invention, the weldment central through hole is made up of an upper section and a lower section, the cross-sectional area of the upper section is larger than that of the lower section, the collector shoe 5 is mounted on the upper section, the lower end face of the ignition shoe 2 presses the ring structure against the flange structure through a first insulating gasket 6 and is fixedly mounted on the upper end of the collector shoe 5 through an ignition shoe fixing nut 3, thereby pressing the ring structure against the flange structure.
According to some embodiments of the invention, the polarized pole nut assembly has a high pressure fitting 15, a polarized pole 14, and a polarized pole nut 16, the high pressure fitting 15 mounted on a sidewall of the combustion chamber weldment 10 having a fitting through-hole; the polarizing pole 14 is installed in the joint through hole through an insulating sleeve; the polarized pole nut 16 is installed on one end of the high-voltage connector 15 far away from the combustion chamber welding piece 10 and is abutted to the polarized pole 14, so that one end of the polarized pole 14 is in contact with the nozzle 17 after penetrating through the connector through hole, the polarized pole nut has a nut through hole for the other end of the polarized pole 14 to penetrate through, and an insulating sleeve is arranged between the polarized pole 14 and the polarized pole nut 16.
According to some embodiments of the invention, the high pressure connection 15, the gas/exhaust gas inlet channel 21 and the combustion gas inlet channel 11 are welded to the side walls of the combustion chamber weldment 10 by means of vacuum brazing. According to some embodiments of the present invention, the hydrogen flame ionization detector further includes a thermal insulation box body 13 and a thermal insulation box cover 12, wherein the thermal insulation box cover 12 is provided with a box cover extending hole through which the top of the combustion chamber welding part 10 extends, and the thermal insulation box body 13 is provided with a box body extending hole through which the bottom of the combustion chamber welding part 10 extends.
According to one embodiment of the present invention, the heat preservation box 13 is a sheet metal welding rivet.
According to an embodiment of the present invention, the thermal insulation box 13 is filled with thermal insulation cotton.
According to some embodiments of the invention, the gas/tail-blow input channel 21 and the comburent gas input channel 11 are both located on the same side of the vertical channel.
According to some embodiments of the present invention, a positioning angle structure is installed on the inner bottom surface of the heat-insulating box 13, a positioning surface 101 corresponding to the positioning angle structure is installed on the side surface of the combustion chamber welding part 10, and the positioning surface 101 is arranged opposite to or on the same side as the gas/tail gas blowing input channel 21 and the combustion-supporting gas input channel 11.
According to some embodiments of the present invention, the side of the thermal insulation box 13 is provided with a pipeline wire inlet/outlet 132, and when the positioning surface 101 is disposed opposite to the gas/tail blowing input channel 21 and the combustion-supporting gas input channel 11, the pipeline wire inlet/outlet is disposed opposite to the positioning angle structure; when the positioning surface 101 is arranged on the same side as the gas/tail blowing input channel 21 and the combustion-supporting gas input channel 11, the pipeline wire inlet and outlet is arranged on the same side as the positioning angle structure.
The main body of the welding part is composed of cylinder sections with different diameters, and a combustion-supporting gas pipeline, a high-pressure joint 15 and a combustible gas and tail-blowing mixed gas pipeline are welded on one side of the main body in a vacuum brazing mode; and a positioning surface 101 corresponding to the positioning angular structure is arranged on the side surface of the welding part main body, so that in the process of mounting the welding part main body on the heat preservation box body 13, the positioning surface 101 is matched with the positioning angular structure to prevent the welding part main body from rotating, and one side of the welding part main body, which is provided with the gas/tail blowing input channel 21 and the combustion-supporting gas input channel 11, is opposite to the pipeline wire inlet/outlet 132, so that the installation is convenient.
According to some embodiments of the present invention, the side of the upper end of the thermal insulation box 13 further has a box flange, and the box flange is provided with a mounting fixing hole 131 for mounting on the column box.
According to some embodiments of the present invention, the hydrogen flame ionization detector further comprises a heating assembly disposed within the thermal insulating case 13, the heating assembly comprising a heat conducting block 18 mounted on the inner bottom surface of the thermal insulating case 13 and connected to the combustion chamber weldment 10 for providing heat to the detector chamber, a heating element 20 disposed within the heat conducting block 18 for generating heat, and a temperature feedback element 19 for monitoring temperature in real time.
According to some embodiments of the present invention, the side structure of the heat conduction block 18 connected to the weldment 10 is the angular positioning structure that mates with the positioning surface 101.
The polarized pole assembly can be installed on the combustion chamber welding piece 10 outside the heat preservation box body 13, and then the combustion chamber welding piece 10 is fixed to the heat conduction block 18 installed in the heat preservation box body 13, so that the installation is convenient.
According to some embodiments of the present invention, a nut post is riveted on the inner bottom surface of the thermal insulation box body 13, and the heat conduction block 18 is fixed on the inner bottom surface of the thermal insulation box body 13 by a fastener matched with the nut post.
According to some embodiments of the present invention, the leads of the heating element 20 and the temperature feedback element 19 extend from the conduit wire port 132.
The heating assembly can be assembled firstly and then fixed on the inner bottom surface of the heat-insulating shell 13 through the fastening piece, so that the installation is more convenient.
The heating assembly is detachably arranged in the heat-insulating shell, the combustion chamber welding piece is detachably arranged on a heating block of the heating assembly, the collecting electrode seat is detachably arranged on the upper part of the combustion chamber welding piece, and the ignition wire assembly is detachably arranged on the upper part of the collecting electrode seat; the disassembly is convenient.
According to one embodiment of the invention, the heating element 20 is a heating rod and the temperature feedback element 19 is a PT100 platinum resistor.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention; the schematic representations in various places in the specification do not necessarily refer to the same embodiment; further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While specific embodiments of the invention have been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention; in particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention; except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.
Claims (10)
1. A hydrogen flame ionization detector, comprising: the device comprises a detector cavity, an ignition wire component, a collector, a signal output component, a combustion-supporting gas input channel, a nozzle, a polarization electrode component, a carrier gas input channel and a gas/tail blowing input channel, wherein the collector is positioned below the ignition wire component and in the detector cavity;
the detector cavity is a vertical channel, the ignition wire assembly is arranged in an ignition pipeline which is positioned on the side wall of the vertical channel and communicated with the detector cavity, the signal output assembly, the combustion-supporting gas input channel, the polarized electrode assembly and the gas/tail blowing input channel are all positioned on the side wall of the vertical channel, one end of the polarized electrode assembly extends into the vertical channel and is communicated with the nozzle, and the other end of the polarized electrode assembly extends out of the vertical channel and is used for wiring; the carrier gas input channel is located at the bottom of the vertical channel.
2. The hydrogen flame ionization detector according to claim 1, wherein the collector is connected to the signal output assembly through the connecting wire, one end of the connecting wire is fixed to the signal output assembly, and the other end of the connecting wire is a ring structure fixed to the collector.
3. A hydrogen flame ionization detector as claimed in claim 1, wherein the fuel/tail bleed gas input passage and the oxidant gas input passage are located on the same side of the vertical passage.
4. The hydrogen flame ionization detector of claim 1, wherein the nozzle has a gas passage, and an outer wall of a lower end of the gas passage is mounted on an inner wall of a bottom of the vertical passage by a screw connection.
5. The hydrogen flame ionization detector according to claim 1, comprising an ignition base, a collector base provided at a lower end of the ignition base by a fastener, and a combustion chamber weld member provided at a lower end of the collector base by a fastener; the ignition seat, the collector seat and the combustion chamber welding piece are respectively provided with an ignition seat central through hole, a collector seat central through hole and a welding piece central through hole; the ignition seat central through hole, the collector seat central through hole and the welding part central through hole form the detector chamber;
the ignition pipeline is located the ignition seat lateral wall, the collector is located in collector seat central through hole, the nozzle is located in welding piece central through hole, polarization utmost point nut subassembly the gas/tail input channel of blowing and combustion-supporting gas input channel all is located on the lateral wall of combustion chamber welding piece, the carrier gas input channel is located the bottom of welding piece central through hole.
6. The hydrogen flame ionization detector of claim 5, wherein the polarized pole nut assembly has a high pressure fitting, a polarized pole, and a polarized pole nut, the high pressure fitting is mounted on a sidewall of the combustion chamber weldment and has fitting through holes; the polarization pole is arranged in the joint through hole through an insulating sleeve; the polarized pole nut is arranged at one end of the high-voltage connector, which is far away from the combustion chamber welding piece, is abutted against the polarized pole, so that one end of the polarized pole penetrates through the connector through hole and then is contacted with the nozzle, the polarized pole nut is provided with a nut through hole through which the other end of the polarized pole, which is used for wiring, penetrates, and an insulating sleeve is arranged between the polarized pole and the polarized pole nut;
the high-pressure joint, the gas/tail blowing input channel and the combustion-supporting gas input channel are welded on the side wall of the combustion chamber welding piece in a vacuum brazing mode.
7. The hydrogen flame ionization detector according to claim 1, further comprising a heat-insulating box and a heat-insulating box cover, wherein the heat-insulating box cover is provided with a box cover extending hole for extending the top of the combustion chamber welding member, and the heat-insulating box is provided with a box body extending hole for extending the bottom of the combustion chamber welding member.
8. A hydrogen flame ionization detector as claimed in claim 7,
the inner bottom surface of the heat preservation box body is provided with a positioning angle structure, the side surface of the combustion chamber welding piece is provided with a positioning surface correspondingly matched with the positioning angle structure, and the positioning surface is arranged opposite to or at the same side as the gas/tail blowing input channel and the combustion-supporting gas input channel.
9. The hydrogen flame ionization detector according to claim 8, wherein a pipeline wire inlet and outlet is provided on a side surface of the thermal insulation case,
when the positioning surface is arranged opposite to the gas/tail blowing input channel and the combustion-supporting gas input channel, the pipeline wire inlet and outlet are arranged opposite to the positioning angular structure; when the positioning surface is arranged on the same side of the gas/tail blowing input channel and the combustion-supporting gas input channel, the pipeline wire inlet and outlet are arranged on the same side of the positioning angle structure.
10. The hydrogen flame ionization detector according to claim 8, further comprising a heating assembly disposed in the thermal insulating case, wherein the heating assembly comprises a heat conducting block mounted on the inner bottom surface of the thermal insulating case and connected to the combustion chamber weld for providing heat to the detector chamber, a heating element disposed in the heat conducting block for generating heat, and a temperature feedback element for monitoring temperature in real time;
the side surface structure of the heat conduction block corresponding to the combustion chamber welding piece is the positioning angle structure matched with the positioning surface.
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| CN201911002428.9A CN110596291A (en) | 2019-10-21 | 2019-10-21 | Hydrogen flame ionization detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911002428.9A CN110596291A (en) | 2019-10-21 | 2019-10-21 | Hydrogen flame ionization detector |
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| WO1996006349A1 (en) * | 1994-08-23 | 1996-02-29 | California Analytical Instruments, Inc. | Improved flame ionization detector |
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| CN209311415U (en) * | 2018-12-27 | 2019-08-27 | 苏州天蓝分析仪器有限公司 | A kind of difunctional gas phase chromatographic detection apparatus of ionization-luminosity based on hydrogen flame |
| CN211553889U (en) * | 2019-10-21 | 2020-09-22 | 江苏天瑞仪器股份有限公司 | Hydrogen flame ionization detector |
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- 2019-10-21 CN CN201911002428.9A patent/CN110596291A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006349A1 (en) * | 1994-08-23 | 1996-02-29 | California Analytical Instruments, Inc. | Improved flame ionization detector |
| CN206387782U (en) * | 2016-12-22 | 2017-08-08 | 汇众翔环保科技河北有限公司 | FID gas-chromatography post cases |
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