CN103630429A

CN103630429A - Pressurized sampling device and sampling method based on near infrared spectral analysis

Info

Publication number: CN103630429A
Application number: CN201310640482.2A
Authority: CN
Inventors: 薛岗; 宋文琦
Original assignee: Tianjin Fire Fighting Institute Ministry of Public Security
Current assignee: Tianjin Institute of Fire Protection, Ministry of Emergency Management
Priority date: 2013-12-04
Filing date: 2013-12-04
Publication date: 2014-03-12
Anticipated expiration: 2033-12-04
Also published as: CN103630429B

Abstract

The invention relates to a pressurized sampling device and sampling method based on near infrared spectral analysis. The pressurized sampling device comprises a storage steel bottle, high-pressure rubber tubes, a pressure reducing valve, a valve and a pressure-resistant sampling storer, wherein two ends of the pressure reducing valve are connected with the high-pressure rubber tubes; the high-pressure rubber tube in front of the pressure reducing valve is connected with the storage steel bottle; the high-pressure rubber tube behind the pressure reducing valve is connected with the valve; the other end of the valve is in threaded connection with the pressure-resistant sampling storer; the pressure-resistant sampling storer comprises an air inlet pipe, a connecting pipe and a storage pipe; a gasket is arranged at each joint of the pipes. The pressurized sampling device and sampling method have the advantages that the method is simple; the sampling is fast; the structure is convenient to disassembly and maintain; measurement and analysis of a gas sample in a near infrared spectrum are realized for the first time; the device and the method also can be popularized in the fields of Raman spectra and infrared spectra.

Description

A kind of sampler with pressure and sampling method based on near-infrared spectrum analysis

Technical field

The present invention relates to a kind of sampling analysis device with pressure and sampling method, particularly a kind of sampler with pressure and sampling method based on near-infrared spectrum analysis.

Background technology

Near infrared spectrum be between visible ray and in infrared between, wavelength coverage 700nm-2500nm(4000 cm ^-1-14285cm ^-1) one section of absorption spectrum, near-infrared spectrum technique is quick because of it, harmless, pollution-free, without destructive, operative technique requires low, can realize the characteristic of online or field quick detection, be widely used in agricultural, food, in the analytic process of the product such as petrochemical industry and medicine, and general adopt (instead) thoroughly penetrated, diffuse reflection, unrestrained (instead) thoroughly the mode such as penetrates, can directly to sample, carry out near-infrared spectral measurement, do not need to carry out pre-service, near infrared spectrum can be applicable to analysed for powder, particle, tablet, limpid liquid, the sample of the different conditions such as turbid solution, but for gaseous sample, be difficult to carry out qualitative or quantitative judgement by the method for near-infrared spectrum analysis, mainly because in sampling process, if what gather is gaseous sample, be difficult to guarantee the consistance of repeated sampling concentration, the accuracy of the spectral analysis of the laggard row of every sub-sampling is just difficult to guarantee, therefore, a kind of sampling method and device thereof must be provided.

Summary of the invention

The present invention is directed to the problem of above-mentioned existence, a kind of sampler with pressure and sampling method that carries out near-infrared spectral measurement analysis that can be used in is provided, gaseous sample is pressurized liquefied, at the near infrared spectrum with gathering liquid gas or fluid sample under pressure condition, and then carry out the express-analysis of the qualitative or quantitative sample composition of near infrared spectrum, concrete technical scheme is, a kind of sampler with pressure based on near-infrared spectrum analysis, comprise storage steel bottle, high-pressure rubber pipe, reduction valve, valve and withstand voltage sample storer, it is characterized in that: reduction valve two ends connect high-pressure rubber pipe, front end high sebific duct connects sample storage steel cylinder, rear end high-pressure rubber pipe connects valve, the valve other end and withstand voltage sample storer are screwed together, described withstand voltage sample storer is by draft tube, connecting pipe and storage tube form, wherein draft tube is the right cylinder of a various outer diameter, the interior through hole being comprised of different pore size and the hole of two-port are screw, compare little one end, aperture is put into packing ring successively, convex plug and spring, convex plug is withstood on packing ring endoporus, this end external diameter has screw thread, storage tube is an obstructed pipe, on sidewall, there is a through hole, mouth of pipe external diameter has screw thread, in pipe, place packing ring and quartz glass tube, connecting pipe internal diameter two ends are with internal thread, by draft tube, storage tube is screwed into one, between each pipe, there is packing ring junction.

A sampling method with pressure based on near-infrared spectrum analysis, is characterized in that: adopt gaseous sample is pressurized liquefied, at band, gather liquid gas sample under pressure condition, sampling method comprises the following steps,

A, gaseous sample is pressurized liquefied, deposits in sample storage steel cylinder;

B, the pressure of storage steel bottle is chosen high-pressure rubber pipe, reduction valve, valve and the withstand voltage sample storer of different voltage endurance capabilities and range ability per sample;

C, the front end high sebific duct of sampler reduction valve is connected to sample storage steel cylinder;

D, sample storage steel cylinder is inverted, is opened successively the switch of sample storage steel cylinder, reduction valve, valve, make can enter in quartz glass tube with liquid form with the sample under pressure condition;

E, when quartz glass tube be full of band press liquid after, connecting pipe and storage tube are spirally connected closely, liquid storage with pressure in the quartz glass tube of storage tube, after having sampled, the switch of valve-off, reduction valve and sample storage steel cylinder; From valve, take off the withstand voltage sampling reservoir of connection.

The invention has the beneficial effects as follows the near-infrared spectral measurement analysis that has realized first gaseous sample, method is simple, sampling is rapid, be convenient to maintenance, and application is extensive, also can be used for the gas-sample analysis in the fields such as Raman spectrum, infrared spectrum.

Accompanying drawing explanation

Fig. 1 is this structure connection diagram.

Fig. 2 is withstand voltage sample storer cut-open view of the present invention.

Embodiment

The example that is sampled as for heptafluoro-propane extinguishing medium.

As Fig. 1, shown in 2, draft tube 5-1 adopts stainless steel material to be made for the right cylinder of a various outer diameter, the interior through hole being comprised of different pore size and the hole of two-port are screw, compare little one end, aperture is put into packing ring 5-4 successively, convex plug 5-5 and spring 5-6, convex plug 5-5 is withstood on packing ring 5-4 endoporus, this end external diameter has screw thread, storage tube 5-3 is an obstructed stainless steel pipe, on sidewall, there is a through hole 5-8, mouth of pipe external diameter has screw thread, in pipe, place packing ring 5-4 and quartz glass tube 5-7, 2mm in quartz glass tube 5-7 wall thickness, radius 2mm, voltage endurance capability 2Mpa, the connecting pipe 5-2 internal diameter two ends that employing stainless steel material is made are with internal thread, by draft tube 5-1, storage tube 5-3 is screwed into one, between each pipe, there is packing ring 5-4 junction, form withstand voltage sample storer 5, 2Mpa reduction valve 3 two ends are connected to high-pressure rubber pipe 2, front end high sebific duct 2 connects sample storage steel cylinder 1, rear end high-pressure rubber pipe 2 connects ball valve 4, ball valve 4 other ends and withstand voltage sample storer 5 are screwed together.

Sampling method, comprises the following steps,

A, gaseous sample is pressurized liquefied, deposits in sample storage steel cylinder 1;

B, the pressure of storage steel bottle is chosen high-pressure rubber pipe 2, reduction valve 3, valve 4 and the withstand voltage sample storer 5 of different voltage endurance capabilities and range ability per sample;

C, the front end high sebific duct of sampler reduction valve 32 is connected to sample storage steel cylinders 1;

D, sample storage steel cylinder is inverted, is opened successively the switch of sample storage steel cylinder, reduction valve 3, valve 4, make can enter in quartz glass tube 5-7 with liquid form with the sample under pressure condition;

E, when quartz glass tube 5-7 be full of band press liquid after, connecting pipe 5-2 and storage tube 5-3 are spirally connected closely, liquid storage with pressure is in the quartz glass tube 5-7 of storage tube 5-3, after having sampled, the switch of valve-off, reduction valve and sample storage steel cylinder, takes off the withstand voltage sampling reservoir 5 of connection from valve 4.

The position of the through hole 5-8 of withstand voltage sampling reservoir 5 being aimed to near-infrared analyzer transmitted light is placed on near-infrared analyzer, can carry out collection analysis.

Its sampling principle is withstand voltage sample storer 5) draft tube 5-1 and connecting pipe 5-2 between have convex plug 5-5 and spring 5-6, when band press liquid enters in withstand voltage sample storer 5 from draft tube 5-1, because the elastic force of spring 5-6 is less than the pressure with press liquid, therefore fluid sample with pressure can back down in the quartz glass tube 5-7 that convex plug 5-5 enters into storage tube 5-3, now the gas in storage tube 5-3 can overflow from the junction of quartz glass tube 5-7 and packing ring, when quartz glass tube 5-7 is full of after band press liquid, connecting pipe 5-2 and storage tube 5-3 are spirally connected closely, now the elastic force of the pressure with press liquid in quartz glass tube 5-7 and spring 5-6 is greater than the pressure with press liquid entering from draft tube 5-1, make convex plug 5-5 can seal air intake opening, therefore, can make to be with press liquid to be stayed in quartz glass tube 5-7.Method is simple, be convenient to safeguard, after as long as high-pressure rubber pipe, reduction valve, valve are connected with gaseous sample storage cylinder fitted with withstand voltage sample storer, in 10 seconds, just can complete sampling, take off the withstand voltage sample storer that liquid sample is housed and just can carry out near-infrared spectrum analysis, realized first the near-infrared spectral measurement analysis of gaseous sample, the method and device can also the analyses in fields such as Raman spectrum, infrared spectrums for gaseous sample.

Claims

1. the sampler with pressure based on near-infrared spectrum analysis, comprise storage steel bottle (1), high-pressure rubber pipe (2), reduction valve (3), valve (4) and withstand voltage sample storer (5), it is characterized in that: reduction valve (3) two ends connect high-pressure rubber pipe (2), front end high sebific duct (2) connects sample storage steel cylinder (1), rear end high-pressure rubber pipe (2) connects valve (4), valve (4) other end and withstand voltage sample storer (5) are screwed together, described withstand voltage sample storer (5) is by draft tube (5-1), connecting pipe (5-2) and storage tube (5-3) form, wherein draft tube (5-1) is the right cylinder of a various outer diameter, the interior through hole being comprised of different pore size and the hole of two-port are screw, compare little one end, aperture is put into packing ring (5-4) successively, convex plug (5-5) and spring (5-6), convex plug (5-5) is withstood on packing ring (5-4) endoporus, this end external diameter has screw thread, storage tube (5-3) is an obstructed pipe, on sidewall, there is a through hole (5-8), mouth of pipe external diameter has screw thread, in pipe, place packing ring (5-4) and quartz glass tube (5-7), connecting pipe (5-2) internal diameter two ends are with internal thread, by draft tube (5-1), storage tube (5-3) is screwed into one, between each pipe, there is packing ring (5-4) junction.

2. the sampling method with pressure based on near-infrared spectrum analysis, is characterized in that: adopt gaseous sample is pressurized liquefied, under band pressure condition, gather liquid gas sample, sampling method comprises the following steps,

B, the pressure of storage steel bottle is chosen different voltage endurance capabilities and the high-pressure rubber pipe of range ability (2), reduction valve (3), valve (4) and withstand voltage sample storer (5) per sample;

C, the front end high sebific duct (2) of sampler reduction valve (3) is connected to sample storage steel cylinder (1);

D, sample storage steel cylinder is inverted, is opened successively the switch of sample storage steel cylinder, reduction valve (3), valve (4), make can enter in quartz glass tube (5-7) with liquid form with the sample under pressure condition;

E, when quartz glass tube (5-7) be full of band press liquid after, connecting pipe (5-2) and storage tube (5-3) are spirally connected closely, liquid storage with pressure in the quartz glass tube (5-7) of storage tube (5-3), after having sampled, the switch of valve-off, reduction valve and sample storage steel cylinder; From valve (4), take off the withstand voltage sampling reservoir (5) of connection.