CN214585145U - Special hydrogen flame detector of portable chromatograph - Google Patents

Abstract

The utility model relates to a hydrogen flame detector, in particular to a portable chromatograph special hydrogen flame detector, which comprises an ion chamber, wherein a signal wire connector is welded on one side of the ion chamber, a nozzle cavity is screwed below the ion chamber through an ion chamber nut, an upper base is fixed below the nozzle cavity through screws, a lower base is welded below the upper base, a nozzle is arranged in the nozzle cavity, the lower part of the nozzle is connected with the outside through a pipeline, and a heating block is arranged outside the lower base; a dustproof cap is screwed above the ion chamber through a dustproof cap nut, and an ignition mechanism is welded on a side wall hole of the dustproof cap; the ion chamber inside set up in the surge drum, the surge drum on set gradually tetrafluoro pad, pressure pad and tetrafluoro pad down from top to bottom. The utility model discloses a special hydrogen flame detector of portable chromatograph, its simple structure, it is small, the heating is fast, is difficult for producing the comdenstion water, and then has increased substantially measurement accuracy.

Description

Special hydrogen flame detector of portable chromatograph

Technical Field

The utility model relates to a hydrogen flame detector, in particular to special hydrogen flame detector of portable chromatograph.

Background

Along with the attention of the state to ecological environment protection, the investment of more and more enterprises on environment protection is increased year by year, particularly the rubber industry, the spraying industry, the manufacturing industry and the petrochemical industry all require 24 hours to detect discharged gas all around the clock, so a VOCS (volatile organic Compounds) online non-methane detection system is in due charge, but the online detection system has the great defect that one set of monitoring system can only monitor one pollution source, the other set of online monitoring system is too expensive and cannot be completely installed, and a supervision department needs to carry out on-site detection.

At present, the hydrogen flame detector is a common portable VOCS chromatograph component, but the structural defects of the hydrogen flame detector are as follows:

1. the conventional hydrogen flame detector of a laboratory chromatograph has large volume, and the power supply voltage of a heating block is 220v, so that the alternating current cannot be used as a portable chromatograph, and the hydrogen flame detector needs to be redesigned;

2. the waste gas of the hydrogen flame detector is discharged from an emptying port and is easy to condense, particularly, outdoor detection is needed in the cold days, the temperature of the detector is low, and the generated condensed water directly influences a base line and further influences an analysis result;

3. the detector is large in size, when the detector detects components of a pollution source, the peak shape is asymmetric, a detector nozzle is made of corundum ceramics, the inner diameter of the nozzle is large (generally 0.6mm) and rough, and low sensitivity and poor base line are caused.

4. The inner diameter of the pipeline of the detector system is thick, and the use amount of carrier gas, hydrogen and air is large.

Disclosure of Invention

In order to solve the problem of the prior art, the utility model provides a special hydrogen flame detector of portable chromatograph, its simple structure, it is small, the heating is fast, is difficult for producing the comdenstion water, and then has increased substantially measurement accuracy.

The utility model discloses the technical scheme who adopts as follows:

a portable hydrogen flame detector special for a chromatograph comprises an ion chamber, wherein a signal wire connector is welded on one side of the ion chamber, a nozzle cavity is in threaded connection with the lower part of the ion chamber through an ion chamber nut, an upper base is fixed on the lower part of the nozzle cavity through screws, a lower base is welded on the lower part of the upper base, a nozzle is arranged in the nozzle cavity, the lower part of the nozzle is connected with the outside through a pipeline, and a heating block is arranged on the outer part of the lower base; a dustproof cap is screwed above the ion chamber through a dustproof cap nut, and an ignition mechanism is welded on a side wall hole of the dustproof cap; the ion chamber inside set up in the surge drum, the surge drum on set gradually tetrafluoro pad, pressure pad and tetrafluoro pad down from top to bottom.

Ignition mechanism including weld in first ignition on the dust cap lateral wall hole connects, first ignition connect the outside spiro union have the second to ignite to connect, first ignition connect and the second ignite and be provided with the ignition skeleton in the cavity between connecting, the ignition skeleton outside be provided with the ceramic tube, ceramic tube and ignition skeleton between be provided with the ignition silk pad.

The collecting cylinder extends into the nozzle cavity downwards, and an ion chamber joint is arranged on the outer side of the lower part of the collecting cylinder.

The pipeline is a stainless steel pipe.

The heating block is fixed on the lower base through screws.

The utility model provides a beneficial effect that technical scheme brought is:

the hydrogen flame detector of the utility model redesigns all machined parts in order to meet the requirement of portable chromatography, the overall size is only about 1/3 of the original, meanwhile, the detector is specially designed to be placed transversely, the heating mode adopts 24V direct current heating, and the heating is faster with small volume;

in order to ensure that the chromatograph can normally use the instrument outdoors and in a cold state, the novel detector is transversely arranged integrally, the vent is arranged on the rear panel of the instrument, and meanwhile, the detector is completely wrapped by heat-insulating cotton in the instrument, so that the phenomenon that the stability of the instrument is influenced by the generation of condensed water due to the low temperature of the detector is prevented;

the novel detector is specially designed for portable chromatography, the size is small, all pipelines are connected by phi 1/16 gas path pipes, the gas linear velocity is high, the response value is good, and gas is saved.

In conclusion, the volume of the hydrogen flame detector of the utility model is only about 1/3 of the conventional detector, which is beneficial to the overall layout of the portable chromatograph, the volume is small, the temperature control is fast, the instrument has short stabilization time and the analysis data precision is high;

the detector is transversely placed and subjected to heat preservation, and the generated water vapor is directly discharged to the outside of the instrument, so that the generation of condensed water in the ion chamber can be reduced to the maximum extent, and the stability of the instrument is facilitated;

the utility model discloses the detector volume is less, and whole internal dimension is thinner, and the linear velocity is high, under the prerequisite of guaranteeing sensitivity, with less gas, guarantees the instrument at the scene as long as possible start time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a portable hydrogen flame detector for chromatograph according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Example one

As shown in the attached drawing 1, the portable hydrogen flame detector special for chromatograph comprises an ion chamber 1, wherein a signal wire connector 2 is welded on one side of the ion chamber 1, a nozzle cavity 4 is screwed below the ion chamber 1 through an ion chamber nut 3, an upper base 5 is fixed below the nozzle cavity 4 through screws, a lower base 6 is welded below the upper base 5, a nozzle 7 is arranged in the nozzle cavity 4, the lower part of the nozzle 7 is connected with the outside through a pipeline 8, and a heating block 9 is arranged outside the lower base 6; a dustproof cap 11 is screwed above the ion chamber 1 through a dustproof cap nut 10, and an ignition mechanism is welded on a side wall hole of the dustproof cap 11; ion chamber 1 inside set up in surge drum 12, surge drum 12 on set gradually from top to bottom and fill up 13, pressure pad 14 and tetrafluoro pad 15 down.

The ignition mechanism of this embodiment including weld in first ignition joint 16 on the dustproof cap 11 side wall hole, first ignition joint 16 outside spiro union have second ignition joint 17, first ignition joint 16 and second ignition joint 17 between the cavity in be provided with ignition skeleton 18, ignition skeleton 18 outside be provided with ceramic tube 19, ceramic tube 19 and ignition skeleton 18 between be provided with ignition wire pad 20.

The collecting cylinder 12 extends downwards into the nozzle cavity 4, and an ion chamber joint 21 is arranged on the outer side of the lower part of the collecting cylinder 12.

The hydrogen flame detector special for the portable chromatograph of the embodiment structurally comprises the following steps:

1. assembling an ignition wire combination: winding the ignition wire into a small circle with the diameter of 3mm, winding 9 circles, respectively penetrating two ends of the ignition wire into two thin holes of the ignition framework 18, pinching the framework to be flat by using a special tool, penetrating an ignition wire lead wire at the other end of the ignition wire framework 18, enabling the length of the ignition wire to be 50cm, pinching the framework to be flat by using the special tool, welding a cold-pressed terminal at the tail end of the lead wire, receiving the position of an outlet of a constant-current power supply board, and fixing the ignition framework 18 on the first ignition joint 16 by using a second ignition joint 17, a porcelain tube 19 and an ignition wire pad 20.

2. Mounting a base: sleeving an upper base 5 on a lower base 6, welding the upper base and the lower base together by argon arc welding, welding a stainless steel pipe with the diameter of phi 1/16' at the lower part of a nozzle 7, wherein the length of the stainless steel pipe is 600mm, then sleeving a red copper sealing gasket 22, and then tightly tightening the red copper sealing gasket on the upper surface of the lower base 6; fixing the base provided with the nozzle on the heating block 9 by using 2M 4 screws, and fixing the nozzle cavity 4 on the upper surface of the upper base 5 by using M3 screws;

3. installation of ion chamber: the ion chamber nut 3 is sleeved on the ion chamber joint 21, and then the ion chamber nut and the ion chamber joint are fastened below the ion chamber 1; welding a signal wire connector 2 on the side surface of the ion chamber 1; an upper tetrafluoro pad 15, a collecting cylinder 12, a pressure pad 14 and a lower tetrafluoro pad 15 are sequentially arranged in the ion chamber 1 from top to bottom.

4. Combination of detectors: tightening the ion chamber 1 of the third step on the outer wire on the upper surface of the upper base by using an ion chamber nut 3; the dustproof cap nut 10 is sleeved on the dustproof cap 11, the first ignition connector 16 is welded on a side hole of the dustproof cap 11, the dustproof cap nut 10 is fastened on an outer wire of the ion chamber 1, finally, two holes of the heating block 9 are utilized and fixed in a heat insulation box of the detector by using screws M4 x 25, heat insulation cotton is added, and then the cover is covered, so that the installation of the detector is finished.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (5)

1. A portable chromatograph special hydrogen flame detector comprises an ion chamber, wherein a signal wire connector is welded on one side of the ion chamber, and the portable chromatograph special hydrogen flame detector is characterized in that a nozzle cavity is screwed below the ion chamber through an ion chamber nut, an upper base is fixed below the nozzle cavity through a screw, a lower base is welded below the upper base, a nozzle is arranged in the nozzle cavity, the lower side of the nozzle is connected with the outside through a pipeline, and a heating block is arranged outside the lower base; a dustproof cap is screwed above the ion chamber through a dustproof cap nut, and an ignition mechanism is welded on a side wall hole of the dustproof cap; the ion chamber inside set up in the surge drum, the surge drum on set gradually tetrafluoro pad, pressure pad and tetrafluoro pad down from top to bottom.

2. The portable hydrogen flame detector for chromatograph of claim 1, wherein the ignition mechanism comprises a first ignition connector welded to the side wall hole of the dust cap, a second ignition connector is screwed to the outer side of the first ignition connector, an ignition frame is arranged in a cavity between the first ignition connector and the second ignition connector, a porcelain tube is arranged on the outer side of the ignition frame, and an ignition wire pad is arranged between the porcelain tube and the ignition frame.

3. The portable chromatograph-dedicated hydrogen flame detector according to claim 1, wherein the collecting cylinder extends downward into the nozzle cavity, and an ion chamber joint is disposed on an outer side of a lower portion of the collecting cylinder.

4. The portable chromatograph-dedicated hydrogen flame detector of claim 1, wherein the pipeline is a stainless steel pipe.

5. The portable chromatograph-dedicated hydrogen flame detector of claim 1, wherein the heating block is fixed on the lower base by screws.

Images