CN217112208U - Portable hydrogen flame ionization detector - Google Patents

Abstract

The utility model provides a portable hydrogen flame ionization detector, which comprises a base and an upper seat connected with the base, wherein the upper seat is provided with a through hole, a polarized electrode component and a collector component which are both communicated with the through hole; be equipped with nozzle, heating structure and temperature sensor in the base, the end of giving vent to anger of nozzle hold in the through-hole, the heating structure with temperature sensor links to each other in order to be based on the temperature information adjustment running state that temperature sensor gathered. The utility model provides a hydrogen flame ionization detector, simple structure, convenient maintenance realizes portable gas chromatograph's miniaturization.

Description

Portable hydrogen flame ionization detector

Technical Field

The utility model relates to a gas chromatograph technical field especially relates to a portable hydrogen flame ionization detector.

Background

A Flame Ionization Detector (FID) is one of the commonly used detectors for gas chromatography. The hydrogen flame ionization detector takes flame generated by combustion of hydrogen and air as an energy source, when organic compounds enter the flame generated by combustion of hydrogen and oxygen, chemical ionization is generated at high temperature, ions with the magnitude orders higher than basic current are generated by ionization, ion current is formed under the directional action of a high-voltage electric field, weak ion current is amplified through high resistance (106-1011 omega) and becomes an electric signal in direct proportion to the amount of the organic compounds entering the flame, and therefore quantitative analysis can be carried out on the organic compounds according to the size of the signal.

In the prior art, the FID detector has a plurality of structural parts, high requirements on a processing technology and poor sealing performance, and the detector is greatly influenced by external temperature to influence the stability of data. The collector assembly is formed by combining a plurality of signal connectors, metal rods, wire pressing terminals, collecting forks and the like, and a plurality of collectors are welded into a whole, so that the manufacturing process is complex, the production cost is high, and the quality batch consistency is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a portable hydrogen flame ionization detector for solve among the prior art hydrogen flame ionization detector structure complicated and the poor defect of data stability.

The utility model provides a portable hydrogen flame ionization detector, which comprises a base and an upper seat connected with the base, wherein the upper seat is provided with a through hole, a polarized electrode component and a collector component which are both communicated with the through hole; be equipped with nozzle, heating structure and temperature sensor in the base, the end of giving vent to anger of nozzle hold in the through-hole, the heating structure with temperature sensor links to each other in order to be based on the temperature information adjustment running state that temperature sensor gathered.

Furthermore, a collecting barrel is inserted into the through hole, and an insulator is arranged between the outer wall of the collecting barrel and the hole wall of the through hole.

Further, the collector assembly comprises a first signal connector and a first metal probe, wherein the first signal connector is connected with the first metal probe, and the first metal probe penetrates through the wall of the collecting barrel to collect electric field signals formed by the ions.

Furthermore, the collector assembly further comprises a first probe arm, one end of the first probe arm is in threaded connection with the upper seat, the other end of the first probe arm is detachably connected with the first signal connector, and the first metal probe is fixedly inserted into the first probe arm.

Furthermore, the polarized electrode assembly further comprises a second probe arm, one end of the second probe arm is fixedly connected with the upper seat, the other end of the second probe arm is fixedly inserted into the second signal connector, and the second metal probe is inserted into the second probe arm.

Furthermore, the polarized electrode assembly further comprises a second probe arm, one end of the second probe arm is in threaded connection with the upper seat, the other end of the second probe arm is detachably connected with the second signal connector, and the second metal probe is fixedly inserted into the first probe arm.

Further, the base comprises a first gas channel, a second gas channel and a third gas channel which respectively circulate hydrogen, carrier gas and air, and the first gas channel and the second gas channel are respectively connected with the gas inlet end of the nozzle; and a mounting hole is formed between the nozzle and the base, and the third gas channel is communicated with the mounting hole.

Further, the portable hydrogen flame ionization detector further comprises an ignition wire and a thermocouple, wherein the thermocouple and the ignition wire are both arranged on the upper seat and located on one side, far away from the base, of the insulator, the ignition wire is used for ignition, and the thermocouple is used for collecting temperature changes to judge the current flame state.

Further, the insulator includes first insulating part and second insulating part, first insulating part compare in the second insulating part is closer to the base, first insulating part with the second insulating part cup joints respectively and is fixed in the collecting vessel, spacing platform is protruding established to the outer wall of collecting vessel, first insulating part with the second insulating part interval is laid spacing platform's relative both sides, first metal probe passes spacing platform with the inner wall parallel and level of collecting vessel.

Further, the portable hydrogen flame ionization detector further comprises a fastening lantern ring, the fastening lantern ring is fixedly connected with the through hole in an inserting mode, the first insulating part is provided with a step surface, and the fastening lantern ring is abutted to the step surface.

The utility model provides a portable hydrogen flame ionization detector comprises base and seat of honour two parts, and the collector subassembly adopts the mode data acquisition of signal connector and metal probe combination, and simple structure conveniently maintains, and sensitivity is also high moreover, can use on portable gas chromatograph. The whole structure breaks through the tradition, and the end part of the metal probe adopts a point-like contact mode to acquire data, so that the miniaturization, convenient installation and maintenance of the portable gas chromatograph are realized.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a portable hydrogen flame ionization detector provided by the present invention;

FIG. 2 is a perspective cross-sectional view of a portable hydrogen flame ionization detector provided by the present invention;

fig. 3 is a sectional view of the collector assembly provided by the present invention;

fig. 4 is a side view of a portable hydrogen flame ionization detector provided by the present invention;

fig. 5 is a cross-sectional view of the portable hydrogen flame ionization detector provided by the present invention.

Reference numerals:

10. a base; 11. a first gas passage; 12. a second gas passage; 13. a third gas passage; 14. a heating structure; 15. a temperature sensor; 20. an upper seat; 21. a through hole; 22. an air outlet; 30. a collector electrode assembly; 31. a first signal connector; 32. a first metal probe; 40. a polarizing pole assembly; 41. a second signal connector; 42. a second metal probe; 50. a collection barrel; 60. an insulator; 61. a first insulating member; 62. a second insulating member; 63. fastening a collar; 71. a first probe arm; 72. a first filling member; 73. a second probe arm; 74. a second filling member; 80. a nozzle; 81. a mounting member; 91. an ignition wire; 92. and a thermocouple.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The portable hydrogen flame ionization detector of the present invention will be described with reference to fig. 1-5.

As shown in fig. 1 and 2, the present invention provides a portable hydrogen flame ionization detector including a base 10, an upper base 20, a collector assembly 30, and a polarizer assembly 40. The base 10 is detachably connected to the upper base 20 as a housing of the entire detector. The base 10 is provided with a first gas passage 11, a second gas passage 12 and a third gas passage 13, the upper base 20 is provided with a through hole 21, and the through hole 21 is communicated with the first gas passage 11, the second gas passage 12 and the third gas passage 13. The polarizing pole assembly 40 is used to provide a polarizing voltage, for example, the polarizing pole assembly 40 provides a high voltage of 160V to 220V as the polarizing voltage. The through hole 21 is inserted with the collecting barrel 50, and an insulator 60 is arranged between the outer wall of the collecting barrel 50 and the wall of the through hole 21. The collector assembly 30 includes a first signal connector 31 and a first metal probe 32, the first signal connector 31 is mounted on the upper base 20 and connected to the first metal probe 32, and the first metal probe 32 penetrates through the wall of the collecting tub 50 to collect electric field signals formed by the ions.

The upper seat 20 and the base 10 are connected by screws or other means, and are convenient to disassemble so as to maintain and replace internal structures. As shown in fig. 2, four screw holes are provided on the base 10, the four screw holes are located at four corners of the rectangle, and the base 10 and the upper seat 20 are fixed by screws after being involuted. Of course, other fastening means may be used for the connection.

A sealing gasket is arranged between the upper seat 20 and the base 10, and the sealing gasket is made of Polytetrafluoroethylene (PTFE). One side of the sealing gasket is abutted with the top of the base 10, the other side of the sealing gasket is abutted with the bottom of the upper seat 20, and the gap at the joint of the upper seat 20 and the base 10 is sealed by the sealing gasket.

The carrier gas, hydrogen gas, and air enter the through-hole 21 through the first gas passage 11, the second gas passage 12, and the third gas passage 13, respectively. Each gas channel is supplied with a gas, which collects along the gas channel in the through-opening 21. Wherein, first gas passage 11, second gas passage 12 and third gas passage 13 three's income gas port can set up in the same one side of base 10, also can set up in the different sides of base 10, does not specifically limit to this the embodiment of the utility model provides a. In addition, the height of the three gas channels on the base 10 can be specifically selected according to the needs. The collecting barrel 50 is nested in the insulator 60, and the insulator 60 is nested in the through hole 21. Specifically, the collecting barrel 50 is located above the gas collection position, the gas is combusted after being collected and ionized under the action of the polarization voltage provided by the polarized electrode assembly 40, the ionized ions enter the collecting barrel 50, and the first metal probe 32 acquires corresponding electric signals and transmits the electric signals to the outside through the first signal connector 31.

The upper seat 20 is a cylinder, and a through hole 21 is formed in the middle of the upper seat. In an alternative embodiment, the upper seat 20 is in the form of a hollow cylindrical sleeve. In another alternative embodiment, the upper housing 20 is a hollow prism. The embodiment of the present invention does not specifically limit the specific shape of the upper seat 20. The collecting barrel 50 is inserted into the through hole 21, and an insulator 60 is arranged between the outer wall of the collecting barrel 50 and the wall of the through hole 21. That is, the insulator 60 is fitted over the collection tub 50, and the insulator 60 and the collection tub 50 are integrally inserted into the through hole 21.

In the conventional recognition, the larger the contact area between the collecting head of the collector assembly 30 and the collecting bucket 50 is, the more advantageous the detection accuracy is, and therefore, the conventional hydrogen flame ionization detector is difficult to be miniaturized. In addition, the traditional collecting head mostly adopts a complex nested structure, has a complex structure and is not convenient to carry.

The embodiment of the utility model provides a portable hydrogen flame ionization detector comprises base 10 and upper seat 20 two parts, and collector subassembly 30 adopts the mode data collection of signal connection and metal probe combination, simple structure, and convenient the maintenance, sensitivity is also high moreover, can use on portable gas chromatograph. The whole structure breaks through the tradition, and the end part of the metal probe adopts a point contact-like mode to acquire data, so that the miniaturization, convenient installation and maintenance of the portable gas chromatograph are realized.

In an embodiment of the present invention, the portable hydrogen flame ionization detector further includes a first probe arm 71, one end of the first probe arm 71 is screwed to the upper seat 20, and the other end of the first probe arm 71 is detachably connected to the first signal connector 31. The first metal probe 32 is fixedly inserted into the first probe arm 71.

Specifically, as shown in fig. 2, the side wall of the upper seat 20 is provided with a first screw hole. As shown in fig. 3, the first probe arm 71 has an external thread at one end thereof, and the external thread is screwed with the internal thread of the screw hole, thereby screwing the first upper arm and the upper seat 20 together. The first probe arm 71 is a hollow cylinder.

As shown in fig. 3, the first probe arm 71 is provided with a first stepped hole along the axial direction, a first adjusting hole is provided on a side wall of the first probe arm 71, and a hole axis of the first adjusting hole is perpendicular to a hole axis of the first stepped hole. The first signal connector 31 is accommodated in the first probe arm 71, and the first fastening screw is inserted into the first adjusting hole, so that the installation tightness of the first signal connector 31 in the first probe arm 71 can be adjusted by screwing the first fastening screw. The first fastening screw is tightened, and the length of screwing the first fastening screw into the first probe arm 71 is increased, thereby tightly abutting the first signal connector 31 in the first probe arm 71. The first fastening screw is loosened, the first fastening screw moves outward of the first probe arm 71, and the first signal connector 31 can be withdrawn inside the first probe arm 71, thereby adjusting the installation tightness of the first signal connector 31 inside the first probe arm 71 by means of the first fastening screw.

The outer wall of the first signal connector 31 is provided with a circle of flange in a protruding manner along the circumferential direction, and the flange is abutted to the orifice of the large hole section in the first stepped hole. When the first signal connector 31 is fixed in the first probe arm 71 by the first fastening screw, the end of the first probe arm 71 is sealed by the rib. One end of the first signal connector 31 inserted into the first probe arm 71 is connected to the first metal probe 32, and the other end of the first signal connector 31 is connected to the transmission line.

Further, the first probe arm 71 is a metal member, a first filling member 72 is embedded in the first probe arm 71, the first filling member 72 is an insulating member, and the first metal probe 32 is inserted and fixed in the first filling member 72.

As shown in fig. 2, the small hole segment of the first stepped hole mounts the first filler piece 72, and the first metal probe 32 is inserted in the first filler piece 72. The first filling member 72 is a column body with a cap body, and is substantially in a bolt shape, the cap body is overlapped on the step surface of the first step hole, and the column body is inserted into the small hole section of the first step hole.

Specifically, the first filler piece 72 is a ceramic piece. The first probe arm 71 is made of a metal member, and the material of the first probe arm may be different from that of the upper seat 20, or may be the same as that of the upper seat 20, which is not limited in the embodiment of the present invention. One end of the first metal probe 32 extends into the collection bucket 50 and is substantially flush with the inner wall of the collection bucket 50.

On the basis of any one of the above embodiments, the embodiment of the present invention provides a portable hydrogen flame ionization detector, wherein the polarized electrode assembly 40 includes a second signal connector 41 and a second metal probe 42, the second signal connector 41 is installed on the upper seat 20, one end of the second metal probe 42 is connected to the second signal connector 41, and the other end of the second metal probe 42 is at the same height as the nozzle 80.

As shown in fig. 2, the second probe arm 73 is fixedly connected to the upper seat 20, and the second signal connector 41 is inserted and fixed to an end of the second probe arm 73 away from the upper seat 20. The second metal probe 42 is inserted into the second arm 73, and the end of the second metal probe 42 is flush with the top of the nozzle 80. Wherein the second metal probe 42 is inserted and fixed in the second signal connector 41 by the second filling member 74. The second probe arm 73, the second signal connector 41 and the second metal probe 42 are mounted in a manner similar to that of the first probe arm 71, the first signal connector 31 and the first metal probe 32, and are not described again here.

Specifically, the first probe arm 71 and the second probe arm 73 may be made of stainless steel, and the first filling body and the second filling body are made of ceramic.

As shown in fig. 2 and 4, the first probe arm 71 and the second probe arm 73 are disposed on the same side of the upper seat 20, and the first probe arm 71 is located below the second probe arm 73. For the convenience of installation, a first fastening screw is located at a lower side of the first probe arm 71 and a second fastening screw is located at an upper side of the second probe arm 73, so that it is not convenient to screw the two fastening screws in case that the distance between the first probe arm 71 and the second probe arm 73 is too small. Of course, the first and second probe arms 71 and 73 may be disposed on different sides of the upper seat 20, for example, the extending direction of the first probe arm 71 and the extending direction of the second probe arm 73 are perpendicular to each other in space, and the first and second fastening screws may be disposed at any positions corresponding to the probe arms.

On the basis of any of the above embodiments, the portable hydrogen flame ionization detector further comprises a nozzle 80, and the nozzle 80 is fixedly installed on the base 10. An installation gap is formed between the nozzle 80 and the base 10, and the air outlet end of the nozzle 80 is accommodated in the through hole 21. The first gas channel 11 is a flow channel of hydrogen, the second gas channel 12 is a flow channel of carrier gas, and the first gas channel 11 and the second gas channel 12 are respectively connected with the gas inlet end of the nozzle 80. The third gas passage 13 is a carrier gas flow passage, and the third gas passage 13 communicates with the mounting gap.

As shown in fig. 5, the first gas passage 11 and the second gas passage 12 are located below the third gas passage 13. Since hydrogen and carrier gas are relatively light in weight with respect to air, the first gas passage 11 serves as a hydrogen gas flow passage, the second gas passage 12 serves as a carrier gas flow passage, and the third gas passage 13 serves as an air flow passage.

Specifically, the base 10 is provided with a mounting screw hole, and the mounting member 81 is provided with an external thread which is fitted with an internal thread of the mounting screw hole. The middle part of the mounting part 81 is provided with a jack, and the nozzle 80 is inserted and fixed in the jack. As shown in fig. 5, the mounting screw hole is located in the middle of the base 10, the end of the nozzle 80 is substantially flush with the first gas passage 11 and the second gas passage 12, and the gas inlet of the nozzle 80 communicates with the first gas passage 11 and the second gas passage 12. The hydrogen gas flowing through the first gas channel 11 and the carrier gas flowing through the second gas channel 12 are introduced into the through hole 21 of the upper seat 20 through the channels in the nozzle 80. There is a mounting gap between the external thread and the internal thread of the mounting screw hole, the third gas passage 13 communicates with the mounting gap, and air circulating in the third gas passage 13 is upwardly mixed with hydrogen gas and carrier gas via the mounting gap.

Specifically, the nozzle 80 is made of quartz, metal, or ceramic. The inner diameter of the nozzle 80 has a large influence on the sensitivity of the detector, and alternatively, the inner diameter of the nozzle 80 is 0.2mm, which is 2-3 times as sensitive as a conventional detector.

The embodiment of the present invention provides a portable hydrogen flame ionization detector, which further comprises an ignition wire 91 and a thermocouple 92, wherein the ignition wire 91 and the thermocouple 92 are both installed on the upper seat 20 and located on one side of the insulator 60 away from the base 10.

As shown in fig. 2 and 4, an ignition wire 91 is mounted on the top of the upper seat 20, and the ignition wire 91 is located below the thermocouple 92 and above the insulator 60. The ignition wire 91 is a platinum wire for ignition. The thermocouple 92 is arranged on the top of the upper seat 20, the thermocouple 92 is positioned above the insulator 60, and the thermocouple 92 is a K-type thermocouple 92 which can quickly sense temperature change so as to judge whether the flame is extinguished, on fire or in the flame size state according to the temperature change, thereby improving the use safety of the detector.

As shown in fig. 5, the insulator 60 includes a first insulating member 61 and a second insulating member 62, and the first insulating member 61 is closer to the base 10 than the second insulating member 62. As shown in fig. 5, the first insulating member 61 is located below the second insulating member 62. Spacing platform is established to the outer wall of collecting vessel 50 protruding, and first insulating part 61 and second insulating part 62 overlap respectively and establish on collecting vessel 50 and the interval is laid in the upper and lower both sides of spacing platform, separates first insulating part 61 and second insulating part 62 with the help of spacing platform. The first metal probe 32 passes through the limit table to be flush with the inner wall of the collection bucket 50.

Specifically, the first insulating member 61 and the second insulating member 62 may have the same or different structures. The thickness of first insulating part 61 is unanimous with the thickness of second insulating part 62, and the height of spacing platform is less than the thickness of first insulating part 61. The second probe arm 73 is disposed corresponding to the limiting table, the second metal probe 42 passes through the gap between the first insulating member 61 and the second insulating member 62 and the limiting table and extends into the collecting barrel 50, and the end of the second metal probe 42 is substantially flush with the inner wall surface of the collecting barrel 50. The ignition wire 91 and the thermocouple 92 are both located above the second insulating member 62.

The insulator 60 insulates the collection vessel 50 from the nozzle 80. At 100V, there is a leakage resistance of 1012 Ω, which results in a baseline shift of 10 nA. The distance between the collection barrel 50 and the second metal probe 42 is 4mm to 6 mm. For example, the bottom of the collection tub 50 is spaced apart from the second metal probe 42 by 5mm in the vertical direction. If the distance between the two is too small, the collection tub 50 is easily overheated, and the noise increases. If the distance between the positive ion flow and the negative ion flow is too large, the time for the ion flow to reach the electrode is long, the probability of recombination of the positive ion and the negative ion is increased, and the collection efficiency is reduced.

The portable hydrogen flame ionization detector further comprises a fastening collar 63, and the fastening collar 63 is inserted and fixed in the through hole 21. The first insulator 61 is provided with a stepped surface, and the fastening collar 63 abuts against the stepped surface.

The collection vessel 50 is limited by upper and lower insulators. The first stopper located below is mounted in the upper seat 20 by a fastening collar 63. The tightening collar 63 is fitted in the upper seat 20, a stepped surface is provided on the first insulating member 61, and the tightening collar 63 abuts against the stepped surface, thereby restricting the degree of freedom of movement of the first insulating member 61 in the axial direction of the through hole 21.

As shown in fig. 2, an air outlet 22 is provided at the top of the upper seat 20, and the diameter of the air outlet 22 is smaller than the cavity in the middle of the upper seat 20. The air outlet 22 is arranged at the top of the upper seat 20 to adjust the air pressure in the cavity and discharge steam and carbon dioxide generated by combustion. Another insulator 60 is disposed at the gas outlet 22 for insulation, and the insulator 60 is made of a ceramic material.

In the portable hydrogen flame ionization detector provided by the utility model, the base 10 and the upper seat 20 are heat conducting pieces. Install heating structure 14 and temperature sensor 15 in the base 10, temperature sensor 15 is used for gathering the base 10 temperature, and heating structure 14 links to each other with temperature sensor 15 in order to adjust operating condition based on the temperature information that temperature sensor 15 gathered.

Specifically, the heating structure 14, such as a heating rod, is installed in the base 10, and since the upper seat 20 and the base 10 are both heat conductive metal, heat generated from the heating rod is transferred to the upper seat 20 by heat conduction of the heat conductive metal. During the heating process, the operation of the heating structure 14 is controlled based on the temperature data collected by the temperature sensor 15 so that the upper seat 20 operates at a constant temperature. Optionally, the temperature sensor 15 is a Pt1000 sensor.

The embodiment of the utility model provides a portable hydrogen flame ionization detector links to each other through nested or threaded connection's mode between each part, has avoided many to connect the problem of gas leakage, and the leakproofness is good, helps acquireing stable data.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. A portable hydrogen flame ionization detector is characterized by comprising a base and an upper seat connected with the base, wherein the upper seat is provided with a through hole, a polarized electrode assembly and a collector electrode assembly, and the polarized electrode assembly and the collector electrode assembly are communicated with the through hole; be equipped with nozzle, heating structure and temperature sensor in the base, the end of giving vent to anger of nozzle hold in the through-hole, the heating structure with temperature sensor links to each other in order to be based on the temperature information adjustment running state that temperature sensor gathered.

2. The portable hydrogen flame ionization detector of claim 1, wherein a collection barrel is inserted into the through hole, and an insulator is arranged between the outer wall of the collection barrel and the wall of the through hole.

3. The portable hydrogen flame ionization detector of claim 2, wherein the collector assembly comprises a first signal connector and a first metal probe, the first signal connector being connected to the first metal probe, the first metal probe penetrating a wall of the collection vessel to collect electric field signals formed by the ions.

4. The portable hydrogen flame ionization detector according to claim 3, wherein the collector assembly further comprises a first probe arm, one end of the first probe arm is in threaded connection with the upper base, the other end of the first probe arm is detachably connected with the first signal connector, and the first metal probe is fixedly inserted into the first probe arm.

5. The portable hydrogen flame ionization detector of claim 1, wherein the polarized pole assembly comprises a second signal connector and a second metal probe, one end of the second metal probe is connected to the second signal connector, and the other end of the second metal probe is at the same height as the nozzle outlet end.

6. The portable hydrogen flame ionization detector of claim 5, wherein the polarized electrode assembly further comprises a second probe arm, one end of the second probe arm is fixedly connected to the upper base, the other end of the second probe arm is fixedly inserted into the second signal connector, and the second metal probe is inserted into the second probe arm.

7. The portable hydrogen flame ionization detector of claim 1, wherein the base comprises a first gas channel, a second gas channel, and a third gas channel through which hydrogen gas, carrier gas, and air flow, respectively, and the first gas channel and the second gas channel are connected to the gas inlet end of the nozzle, respectively; and a mounting hole is formed between the nozzle and the base, and the third gas channel is communicated with the mounting hole.

8. The portable hydrogen flame ionization detector of claim 1, further comprising an ignition wire and a thermocouple, wherein the thermocouple and the ignition wire are both mounted on a side of the upper seat away from the base, the ignition wire is used for ignition, and the thermocouple is used for collecting temperature changes to determine a current flame state.

9. The portable hydrogen flame ionization detector of claim 2, wherein the insulator comprises a first insulator and a second insulator, the first insulator is closer to the base than the second insulator, the first insulator and the second insulator are respectively sleeved and fixed to the collecting barrel, a limiting table is convexly arranged on the outer wall of the collecting barrel, and the first insulator and the second insulator are arranged on two opposite sides of the limiting table at intervals.

10. The portable hydrogen flame ionization detector of claim 9, further comprising a fastening collar, wherein the fastening collar is fixed to the through hole in an inserted manner, the first insulating member is provided with a step surface, and the fastening collar abuts against the step surface.

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