CN212568658U

CN212568658U - Double-channel flame photometric detector

Info

Publication number: CN212568658U
Application number: CN202021302735.7U
Authority: CN
Inventors: 刘青峰; 方鹏辉; 邓荣龙
Original assignee: Shanghai Nuoyu Testing Technology Co ltd
Current assignee: Shanghai Nuoyu Testing Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-19
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a binary channels flame luminosity detector, including photomultiplier with advance a kind bushing pipe, advance a kind bushing pipe upper portion and install the nozzle, nozzle upper portion is equipped with the combustion chamber, two observation windows are installed to the relative both sides of combustion chamber, two observation windows keep away from combustion chamber one side and install the planoconvex mirror, the planoconvex mirror is kept away from observation window one side and is installed the fixed cover of second light filter, the fixed cover of second light filter is connected with the light filter, the light filter is kept away from the fixed cover of the first light filter of a side-mounting of the fixed cover of second light filter, the light filter is kept away from combustion chamber one side and is installed photomultiplier, photomultiplier external connection has. The photomultiplier used by the flame photometric detector is of a small side window structure, so that the overall dimension of the conventional detector is greatly reduced, and the space required by installation is reduced; the flame photometric detector can be used for simultaneously detecting sulfur-containing samples and phosphorus-containing samples, thereby greatly reducing the analysis labor time of the samples and improving the working efficiency.

Description

Double-channel flame photometric detector

Technical Field

The utility model relates to a detector technical field, concretely relates to binary channels flame luminosity detector.

Background

A Flame Photometric Detector (FPD) is a detector for gas chromatography, which has a high selectivity and a high sensitivity for phosphorus-containing and sulfur-containing compounds. When the sample is burnt in a hydrogen-rich flame, the phosphorus-containing organic compound mainly emits light with the wavelength of 526nm in the form of HPO fragments, and the sulfur-containing compound emits characteristic light with the wavelength of 394nm in the form of S2 molecules. The photomultiplier converts the optical signal into an electrical signal, and the electrical signal is amplified and recorded by a micro-current. The method is favorable for analyzing trace phosphorus and sulfur, is a main tool for detecting organophosphorus pesticide and sulfur-containing pollutants, and is also one of detectors commonly used by gas chromatographs. However, the flame photometric detectors currently used in the market often detect only sulfide or phosphide at one time, but cannot detect the sulfide or phosphide at the same time, and if two substances are to be detected at the same time, two flame photometric detectors are required to detect the sulfide or phosphide respectively, which increases the cost. If need the manual work to switch different printing opacity pieces, just greatly increased the cost of labor, reduced work efficiency.

Flame photometric detector that gas chromatograph used in the market all is the function singleness, or only detect the sulphide, or only detect the phosphide, and if switch over the detection before sulphide and phosphide, just need the manual work to dismantle the detector, change the printing opacity piece, greatly increased the cost of labor, the time cost, and current single flame photometric detector can not detect sulphide and phosphide sample simultaneously, therefore, it is urgent to need a flame photometric detector can be used and detect the sample that contains sulphur and phosphorus simultaneously, the analysis labour time of sample has significantly reduced, improve work efficiency and convenient to use's novel binary channels flame photometric detector.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a binary channels flame photometric detector to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a binary channels flame photometric detector, includes photomultiplier and advances a kind bushing pipe, advance a kind bushing pipe upper portion and install the nozzle, nozzle upper portion is equipped with the combustion chamber, two observation windows are installed to the relative both sides of combustion chamber, two the observation window is kept away from combustion chamber one side and is installed planoconvex lens, planoconvex lens is kept away from observation window one side and is installed the fixed cover of second light filter, the fixed cover of second light filter is connected with the light filter, the light filter is kept away from the fixed cover of the first light filter of a side-mounting of the fixed cover of second light filter, the light filter is kept away from combustion chamber one side and is installed photomultiplier, photomultiplier outside connection has photomultiplier installation cover.

When the sample is burnt in a hydrogen-rich flame, the phosphorus-containing organic compound mainly emits light with the wavelength of 526nm in the form of HPO fragments, and the sulfur-containing compound emits characteristic light with the wavelength of 394nm in the form of S2 molecules. The photomultiplier 2 converts the optical signal into an electrical signal, and the electrical signal is amplified and recorded by a micro-current.

Preferably, the optical filter is a sulfur filter and a phosphorus filter.

Preferably, the optical filter is fixedly arranged on the photomultiplier tube mounting sleeve through a first optical filter fixing sleeve and a second optical filter fixing sleeve.

Preferably, the observation window is fixed in the combustion chamber through a locking screw.

Preferably, the nozzle is fixed to the combustion chamber by a screw thread.

Preferably, the sample injection liner is fixed on the combustion chamber through vacuum brazing.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the photomultiplier used by the flame photometric detector is of a small side window structure, so that the overall dimension of the conventional detector is greatly reduced, and the space required by installation is reduced; by adopting a novel structural design, the flame photometric detector can simultaneously detect sulfur-containing and phosphorus-containing samples, thereby greatly reducing the analysis labor time of the samples and improving the working efficiency.

2. The utility model discloses passing through the pipeline with the sample and getting into the detector combustion chamber, the sulphur phosphorus compound in the sample launches the light of different wavelengths respectively through flame burning, through the light filter of difference, the wave filtering of all the other light emission, then photomultiplier converts light signal into the signal of telecommunication, transmits for the instrument.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention.

In the figure: 1. a photomultiplier tube mounting sleeve; 2. a photomultiplier tube; 3. a first optical filter fixing sleeve; 4. an optical filter; 5. a second optical filter fixing sleeve; 6. a plano-convex mirror; 7. an observation window; 8. a nozzle; 9. a combustion chamber; 10. and (5) sampling a lining pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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 work belong to the protection scope of the present invention.

Referring to fig. 1, a dual-channel flame photometric detector comprises a photomultiplier 2 and a sample injection liner tube 10, wherein a nozzle 8 is installed at the upper part of the sample injection liner tube 10, a combustion chamber 9 is arranged at the upper part of the nozzle 8, and the nozzle 8 is fixed in the combustion chamber 9 through threads; the sample injection liner tube 10 is fixed on the combustion chamber 9 through vacuum brazing; two observation windows 7 are installed to 9 relative both sides of combustion chamber, two observation window 7 is kept away from 9 one side of combustion chamber and is installed planoconvex mirror 6, planoconvex mirror 6 is kept away from observation window 7 one side and is installed the fixed cover of second light filter 5, the fixed cover of second light filter 5 is connected with light filter 4, observation window 7 passes through locking screw to be fixed in combustion chamber 9.

The filter 4 is far away from the fixed cover 3 of the fixed cover 5 of second light filter one side installation first light filter, light filter 4 is far away from 9 one sides of combustion chamber and installs photomultiplier 2, photomultiplier 2 external connection has photomultiplier installation cover 1, light filter 4 be sulphur light filter and phosphorus light filter, light filter 4 through the fixed cover 3 of first light filter and the fixed cover 5 fixed mounting of second light filter on photomultiplier installation cover 1.

The working principle is as follows: when the heating device in the anti-explosion cavity is used, firstly, air enters the nozzle 8 through the combustion chamber 9, hydrogen and a sample pass through the sample injection liner tube 10 and then enter the nozzle 8 to be mixed with air, ignition is carried out through the ignition device on the combustion chamber 9, the hydrogen and the air are ignited and combusted, the sample is combusted, sulfur-containing and phosphorus-containing compounds in the sample emit different light waves, the light waves pass through the observation window 7 and are converted into parallel light beams through the plano-convex mirror 6, the parallel light beams are selected through different optical filters 4, redundant unused light beams are removed, usable required light beams are left to be continuously transmitted and finally received by the photomultiplier 2, then the photomultiplier 2 converts optical signals into electric signals, and the signals are transmitted to an instrument for receiving and processing through amplification conversion and the like.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A dual channel flame photometric detector, includes photomultiplier (2) and advances a kind bushing pipe (10), its characterized in that: advance kind bushing pipe (10) upper portion and install nozzle (8), nozzle (8) upper portion is equipped with combustion chamber (9), two observation window (7) are installed to combustion chamber (9) relative both sides, two observation window (7) are kept away from combustion chamber (9) one side and are installed planoconvex mirror (6), the fixed cover of second light filter (5) is installed to observation window (7) one side in planoconvex mirror (6) keep away from, the fixed cover of second light filter (5) is connected with light filter (4), the fixed cover of a side-mounting first light filter (3) of the fixed cover of second light filter (5) is kept away from in light filter (4), combustion chamber (9) one side is kept away from in light filter (4) and photomultiplier (2) are installed, photomultiplier (2) external connection has photomultiplier installation cover (1).

2. The dual channel flame photometric detector as defined in claim 1 wherein: the optical filter (4) is a sulfur optical filter and a phosphorus optical filter.

3. A dual channel flame photometric detector as set forth in claim 2 wherein: the optical filter (4) is fixedly arranged on the photomultiplier mounting sleeve (1) through a first optical filter fixing sleeve (3) and a second optical filter fixing sleeve (5).

4. The dual channel flame photometric detector as defined in claim 1 wherein: the observation window (7) is fixed in the combustion chamber (9) through a locking screw.

5. The dual channel flame photometric detector as defined in claim 1 wherein: the nozzle (8) is fixed on the combustion chamber (9) through threads.

6. The dual channel flame photometric detector as defined in claim 1 wherein: the sample injection liner pipe (10) is fixed on the combustion chamber (9) through vacuum brazing.