CN211402265U

CN211402265U - Sample gas circulation device for gas chromatograph

Info

Publication number: CN211402265U
Application number: CN201921830525.2U
Authority: CN
Inventors: 金冬林
Original assignee: Chengdu Tuoland Gas Co ltd
Current assignee: Chengdu Tuoland Gas Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-09-01
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a sample gas circulation device for gas chromatograph, including setting up the feeding chamber in gas chromatograph one side, the top in feeding chamber is equipped with a plurality of inlet pipes, the equal threaded connection in top of inlet pipe has the storage bottle, just all be equipped with the spiral scribing in the inlet pipe, spiral scribing bilateral symmetry is equipped with the bracing piece, the one end and the inlet pipe fixed connection of spiral scribing are kept away from to the bracing piece, the opening part at storage bottle top is equipped with the seal membrane. The utility model discloses a plurality of inlet pipes and the storage bottle that set up can shorten the required time of multiple sample testing, combines spiral scribing and seal membrane, has abandoned traditional injection formula sample leading-in mode to with the help of miniature vacuum machine and miniature desiccator, avoid unnecessary air to enter into detection device along with it in, with this content that reduces moisture content in the carrier gas, improve the degree of accuracy that detects, play certain guard action to the test element.

Description

Sample gas circulation device for gas chromatograph

Technical Field

The utility model relates to a gas chromatograph field especially relates to a sample gas circulation device for gas chromatograph.

Background

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. The method can be used for analyzing heat-stable organic matters with the boiling point not more than 500 ℃ in soil, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like.

When the existing gas chromatograph is used for gas detection, a single injector is mostly adopted to inject sample gas into the gas chromatograph through a sample inlet, the air in the injector needs to be repeatedly evacuated before the gas detection, then a sample solution is extracted for injection, in the process, the external air is difficult to be mixed into the sample solution, the detection accuracy is reduced, if other samples are required to be detected after the detection is finished, other sample solutions are required to be extracted, the working efficiency is extremely low, the existing gas chromatograph adopts carrier gas to drive sample gas to enter a detection part for detection, and the carrier gas often contains moisture, since the moisture enters the detection member, which has been corrosive to the detection member in the past, and also affects the detection result, the maintenance cost of the entire apparatus is increased, and therefore, it is necessary to design a sample gas flow device for a gas chromatograph.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to solve the shortcoming that exists among the prior art, if: when the existing gas chromatograph is used for gas detection, a single injector is mostly adopted to inject sample gas into the gas chromatograph through an injection port, air in the injector needs to be exhausted repeatedly before, then a sample solution is extracted for injection, external air is difficult to mix into the sample solution in the process, the detection accuracy is reduced, after the detection is finished, if the detection of other samples needs to be carried out, other sample solutions need to be extracted, the working efficiency is extremely low, the existing gas chromatograph adopts carrier gas to drive the sample gas to enter a detection part for detection, the carrier gas often contains moisture, the moisture enters the detection part, the detection part can be corroded for a long time, the detection result can be influenced, and the maintenance cost of the whole device is increased.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sample gas circulation device for gas chromatograph, is including setting up the feeding chamber in gas chromatograph one side, the top in feeding chamber is equipped with a plurality of inlet pipes, the equal threaded connection in top of inlet pipe has the storage bottle, just all be equipped with the spiral scribing slice in the inlet pipe, spiral scribing slice bilateral symmetry is equipped with the bracing piece, the one end and the inlet pipe fixed connection of spiral scribing slice are kept away from to the bracing piece, the opening part at storage bottle top is equipped with the seal membrane, one side that gas chromatograph was kept away from to the feeding chamber is equipped with vacuum apparatus, just the bottom in feeding chamber is equipped with the vaporizing device, one side that gas chromatograph was kept away from to the vaporizing device is equipped with micro-dryer, one side that vaporizing device was kept away from to.

Preferably, vacuum apparatus includes micro vacuum pump, a lateral wall of micro vacuum pump is equipped with first pipe, first pipe is linked together with the feeding chamber, micro vacuum pump's bottom mounting is equipped with first backup pad, the one end of first backup pad and the lateral wall fixed connection in feeding chamber.

Preferably, the vaporizing device includes miniature vaporizer, the top fixedly connected with second pipe of miniature vaporizer, the second pipe is linked together with the feeding chamber, gas chromatograph is close to the fixed second backup pad that is equipped with of one side lateral wall in feeding chamber, and miniature vaporizer fixes in the second backup pad, miniature vaporizer is close to fixed third pipe that is equipped with on one side wall of gas chromatograph, third pipe and gas chromatograph's detection device intercommunication, still fixed being equipped with miniature desiccator in the second backup pad, and be connected with the fourth pipe between miniature desiccator and the miniature vaporizer.

Preferably, the gas carrier device comprises a vacuum gas carrier bottle, an air outlet pipe is fixedly arranged on one side wall of the vacuum gas carrier bottle close to the micro-dryer, and the air outlet pipe is communicated with the micro-dryer.

Preferably, the feeding pipe and the first guide pipe are provided with second manual control valves.

Preferably, the second duct, the fourth duct and the air outlet pipe are all provided with a first manual control valve.

The utility model has the advantages that: through a plurality of inlet pipes and the storage bottle that sets up, can shorten the required time of multiple sample testing, combine spiral scribing and seal membrane, abandoned traditional injection formula sample leading-in mode to with the help of miniature vacuum machine and miniature desiccator, avoid unnecessary air to enter into detection device along with it in, with the content of moisture content in the this reduction carrier gas, improve the degree of accuracy that detects, play certain guard action to the testing element.

Drawings

Fig. 1 is a schematic front structural view of a sample gas circulation device for a gas chromatograph according to the present invention;

fig. 2 is a top view of a feed pipe structure of a sample gas circulation device for a gas chromatograph according to the present invention;

fig. 3 is a front view of a storage bottle structure of a sample gas circulation device for a gas chromatograph according to the present invention;

FIG. 4 is an enlarged view of the structure A in FIG. 1;

fig. 5 is an enlarged view of the structure B in fig. 3.

In the figure: the device comprises a gas chromatograph 1, a feeding cavity 2, a feeding pipe 3, a material storage bottle 4, a first guide pipe 5, a micro vacuum pump 6, a first support plate 7, a second guide pipe 8, a micro vaporizer 9, a third guide pipe 10, a second support plate 11, a fourth guide pipe 12, a micro dryer 13, an air outlet pipe 14, a first manual control valve 15, a vacuum gas carrying bottle 16, a spiral scribing sheet 17, a support rod 18, a sealing film 19 and a second manual control valve 20.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 and simplicity of description, and do not indicate or imply that the device or element being 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.

Referring to fig. 1-5, a sample gas circulation device for a gas chromatograph comprises a feeding cavity 2 arranged on one side of the gas chromatograph 1, wherein a plurality of feeding pipes 3 are arranged at the top end of the feeding cavity 2, a storage bottle 4 is in threaded connection with the top of each feeding pipe 3, spiral scribing sheets 17 are arranged in the feeding pipes 3, supporting rods 18 are symmetrically arranged on two sides of each spiral scribing sheet 17, one ends, far away from the spiral scribing sheets 17, of the supporting rods 18 are fixedly connected with the feeding pipes 3, a sealing film 19 is arranged at an opening at the top of the storage bottle 4, the sealing film 19 is scratched through the spiral scribing sheets 17, so that sample solution in the storage bottle 4 can enter the feeding cavity 2, a vacuum device is arranged on one side, far away from the gas chromatograph 1, of the feeding cavity 2, the vacuum device comprises a micro vacuum pump 6 (the model is EDLP600), a first guide pipe 5 is arranged on one side, the bottom end of the micro vacuum pump 6 is fixedly provided with a first supporting plate 7, one end of the first supporting plate 7 is fixedly connected with the outer side wall of the feeding cavity 2, redundant air in the feeding cavity 2 is pumped out through the micro vacuum pump 6, the redundant air is prevented from being mixed in sample gas, the detection accuracy is reduced, the bottom of the feeding cavity 2 is provided with a vaporizing device, one side of the vaporizing device, which is far away from the gas chromatograph 1, is provided with a micro dryer 13, one side of the micro dryer 13, which is far away from the vaporizing device, is provided with a carrier gas device, the vaporizing device comprises a micro vaporizer 9 (the model is ISO 12614-16-2014), the top end of the micro vaporizer 9 is fixedly connected with a second conduit 8, the second conduit 8 is communicated with the feeding cavity 2, after the sample solution in the feeding cavity 2 enters the micro vaporizer 9, the sample solution is rapidly converted into a gas state from a liquid state, the subsequent detection is facilitated, one side wall, a micro-vaporizer 9 is fixed on a second support plate 11, a third conduit 10 is fixed on one side wall of the micro-vaporizer 9 close to the gas chromatograph 1, the third conduit 10 is communicated with a detection device of the gas chromatograph 1, so that the sample gas is sent to the gas chromatograph 1 for detection, a micro-dryer 13 (model QFN-9000Y) is also fixed on the second support plate 11, a fourth conduit 12 is connected between the micro-dryer 13 and the micro-vaporizer 9, the carrier gas device comprises a vacuum carrier gas cylinder 16, an air outlet pipe 14 is fixed on one side wall of the vacuum carrier gas cylinder 16 close to the micro-dryer 13, the air outlet pipe 14 is communicated with the micro-dryer 13, the carrier gas is dried by the micro-dryer 13 to reduce the moisture content therein, a second manual control valve 20 is arranged on the feed pipe 3 and the first conduit 5, a second conduit 8, The fourth duct 12 and the air outlet pipe 14 are provided with a first manual control valve 15.

In the utility model, when using the device, firstly, open the second manual control valve 20 on the first conduit 5, the excessive air in the feeding cavity 2 is pumped out of the device through the micro vacuum pump 6, then close the second manual control valve 20 on the first conduit 5, screw-connect the storage bottle 4 sealed in advance on the feeding pipe 3, in the process of screwing up, the sealing film 19 gradually approaches the spiral scribing sheet 17 and is finally scratched by the spiral scribing sheet 17, open the second manual control valve 20 on the feeding pipe 3, so that the sample solution enters into the feeding cavity 2, then open the first manual control valve 15 on the second conduit 8, the sample solution changes from liquid state to gas state with the help of the function of the micro vaporizer 9, at this time, open the first manual control valve 15 on the air outlet pipe 14, so that the carrier gas enters into the micro dryer 13, the carrier gas is dried through the micro dryer 13, the first manual control valve 15 on the fourth conduit 12 is then opened to allow the carrier gas to enter the micro-vaporizer 9, bringing the sample gas into the gas chromatograph 1 for detection.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a sample gas circulation device for gas chromatograph, is including setting up feeding chamber (2) in gas chromatograph (1) one side, its characterized in that, the top of feeding chamber (2) is equipped with a plurality of inlet pipes (3), the equal threaded connection in top of inlet pipe (3) has storage bottle (4), just all be equipped with spiral scribing (17) in inlet pipe (3), spiral scribing (17) bilateral symmetry is equipped with bracing piece (18), the one end and inlet pipe (3) fixed connection that spiral scribing (17) were kept away from in bracing piece (18), the opening part at storage bottle (4) top is equipped with seal membrane (19), one side that gas chromatograph (1) was kept away from in feeding chamber (2) is equipped with vacuum apparatus, just the bottom of feeding chamber (2) is equipped with vapourization device, one side that gas chromatograph (1) was kept away from to vapourization device is equipped with micro-dryer (13), and a carrier gas device is arranged on one side of the micro dryer (13) far away from the vaporizing device.

2. The sample gas circulation device for gas chromatograph according to claim 1, wherein the vacuum device comprises a micro vacuum pump (6), a first conduit (5) is disposed on a side wall of the micro vacuum pump (6), the first conduit (5) is communicated with the feeding cavity (2), a first support plate (7) is fixedly disposed at a bottom end of the micro vacuum pump (6), and one end of the first support plate (7) is fixedly connected with an outer side wall of the feeding cavity (2).

3. The sample gas flow-through device for gas chromatograph of claim 1, the vaporizing device comprises a micro vaporizer (9), the top end of the micro vaporizer (9) is fixedly connected with a second conduit (8), the second conduit (8) is communicated with the feeding cavity (2), a second supporting plate (11) is fixedly arranged on the side wall of the gas chromatograph (1) close to the feeding cavity (2), and the micro vaporizer (9) is fixed on the second supporting plate (11), a third conduit (10) is fixedly arranged on one side wall of the micro vaporizer (9) close to the gas chromatograph (1), the third conduit (10) is communicated with a detection device of the gas chromatograph (1), a micro dryer (13) is also fixedly arranged on the second supporting plate (11), and a fourth conduit (12) is connected between the micro dryer (13) and the micro vaporizer (9).

4. The sample gas circulation device for the gas chromatograph as recited in claim 3, wherein the carrier gas device comprises a vacuum carrier gas cylinder (16), a side wall of the vacuum carrier gas cylinder (16) near the micro-dryer (13) is fixedly provided with an air outlet pipe (14), and the air outlet pipe (14) is communicated with the micro-dryer (13).

5. A sample gas flow-through device for gas chromatography according to claim 2, characterized in that the feed pipe (3) and the first conduit (5) are provided with second manual control valves (20).

6. A sample gas flow-through device for gas chromatographs according to claim 4, characterized in that the second duct (8), the fourth duct (12) and the outlet duct (14) are provided with a first manually controllable valve (15).