CN210145700U

CN210145700U - Gas purifying and filtering device for chromatograph

Info

Publication number: CN210145700U
Application number: CN201920218057.7U
Authority: CN
Inventors: 鲍贵娟
Original assignee: Qinghai Biwei Testing Technology Co Ltd
Current assignee: Qinghai Biwei Testing Technology Co Ltd
Priority date: 2019-02-21
Filing date: 2019-02-21
Publication date: 2020-03-17
Anticipated expiration: 2029-02-21

Abstract

The utility model discloses a gaseous purification and filtration device of chromatograph relates to chromatograph technical field. The utility model comprises a purifying box and a drying box; the upper end of the purifying box is provided with a first opening; a first box cover is arranged on the first opening; a plurality of filter screens are sequentially arranged in the purifying box from left to right; a clamping strip for clamping the filter screen is arranged on one opposite inner wall of the purification box; the clamping strips are respectively positioned at two sides of the filter screen; the inner side surface of the first box cover is provided with clamping sleeves which correspond to the filter screens one by one; the left side wall of the purifying box is provided with an air inlet, and the right side wall of the purifying box is provided with an air outlet; a steel wire mesh is arranged in the drying box; silica gel dry particles are laid on the steel wire mesh; the air outlet is communicated with the drying box through a first air guide pipeline. The utility model discloses a multilayer filter screen carries out the multiple filtration to gas sample and detach impurity particle wherein to carry out the dry aqueous vapor that detach the contained through the dry granule of silica gel to the gas sample after filtering, improved the detection precision of chromatograph.

Description

Gas purifying and filtering device for chromatograph

Technical Field

The utility model belongs to the technical field of the chromatograph, especially, relate to gaseous purification and filtration device of chromatograph.

Background

The gas chromatograph has wide application in fire investigation, petroleum, chemical engineering, biochemistry, medicine and health, food industry, environmental protection and the like. It can be used for quantitative and qualitative analysis, and can also be used for determining the distribution coefficient, activity coefficient, molecular weight and specific surface area of sample on the stationary phase. An instrument for analyzing and detecting each component in mixed gas.

An instrument for measuring a gas sample by using a thermal conductivity detector is one of gas chromatographs, but the gas sample, particularly an off-gas sample, often contains moisture and various impurities. When a sample is directly fed without a sample filter, impurities enter an instrument, so that a chromatographic spectrogram base line deviates, a peak is drawn, a measurement result is unstable, and the accuracy and precision of the measurement result are seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gaseous purification and filtration device of chromatograph, impurity and aqueous vapor that contain in the detached gas through carrying out the filter drying to the gas that gets into the chromatograph improve gaseous purity, and then improve the detection precision of chromatograph.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a gas purifying and filtering device of a chromatograph, which comprises a purifying box and a drying box;

the upper end of the purification box is provided with a first opening; a first box cover is arranged on the first opening and is in sealing connection with the first opening; a plurality of filter screens are sequentially arranged in the purification box from left to right; a clamping strip for clamping the filter screen is arranged on one opposite inner wall of the purification box; the clamping strips are respectively positioned at two sides of the filter screen; the inner side surface of the first box cover is provided with clamping sleeves which correspond to the filter screens one by one; an air inlet is formed in the left side wall of the purification box; an air outlet is arranged on the right side wall of the purification box;

the drying box is positioned on one side of the purifying box; a steel wire mesh is arranged in the drying box; silica gel dry particles are laid on the steel wire mesh; the air outlet is communicated with the drying box through a first air guide pipeline, and one end of the first air guide pipeline is positioned below the steel wire mesh; the top of the drying box is provided with an exhaust hole; the exhaust hole is communicated with a second air duct.

Furthermore, a groove is formed in the upper end of the purifying box; the groove is arranged along the circumferential direction of the first opening; and the inner side surface of the first box cover is provided with a rubber bulge matched with the groove.

Further, the first box cover is clamped with the purifying box.

Furthermore, the filter screens are a first filter screen, a second filter screen, a third filter screen, a fourth filter screen, a fifth filter screen and a sixth filter screen from left to right in sequence; the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are all stainless steel filter screens, and the diameters of meshes are reduced in sequence; the fifth filter screen and the sixth filter screen are both activated carbon filter screens, and the mesh diameters of the activated carbon filter screens are the same.

Further, a second opening is formed in the top of the drying box; and a second box cover is arranged on the second opening in a sealing manner.

The utility model discloses following beneficial effect has:

1. the utility model discloses a multilayer filter screen carries out a lot of to gas sample and filters the foreign particles in the detached gas sample to the gas sample after filtering through the dry granule of silica gel in the drying cabinet carries out the aqueous vapor that dry detached gas sample contains, has guaranteed that the gas sample that gets into in the chromatograph does not have impurity and aqueous vapor, has improved the detection precision of chromatograph.

2. The utility model discloses a card strip is fixed the filter screen, makes things convenient for the filter screen to wash the change.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a gas purifying and filtering device of a chromatograph according to the present invention;

FIG. 2 is a top view of a chromatograph gas purification filter apparatus without a first cover;

FIG. 3 is a schematic view of the first cover;

in the drawings, the components represented by the respective reference numerals are listed below:

1-a purifying box, 2-a drying box, 101-a first opening, 3-a first box cover, 4-a filter screen, 5-a clamping strip, 6-a clamping sleeve, 7-an air inlet, 8-an air outlet, 9-a steel wire mesh, 10-a first air guide pipeline, 11-a second air guide pipeline, 102-a groove, 12-a rubber bulge, 13-a second box cover and 14-silica gel dry particles.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper end", "peripheral side", "inner side", "from left to right", "inner wall", "inner side", etc. indicate orientations or positional relationships, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the components or elements 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. 1-2, the present invention relates to a gas purifying and filtering device for a chromatograph, which comprises a purifying box 1 and a drying box 2;

the upper end of the purifying box 1 is provided with a first opening 101; a first box cover 3 is arranged on the first opening 101, and the first box cover 3 is clamped with the purification box 1; specifically, clamping blocks are arranged on two outer side surfaces of the purifying box 1, and clamping holes are formed in the clamping blocks; the edge of the first box cover 3 is provided with a clamping jaw matched with the clamping hole at the position opposite to the clamping block. The first cover 3 is hermetically connected with the first opening 101, and specifically, a groove 102 is formed at the upper end of the purifying box 1; the groove 102 is provided along the circumferential direction of the first opening 101; the inner side surface of the first cover 3 is provided with a rubber bulge 12 matched with the groove 102, when the first cover 3 covers the first opening 101, the rubber bulge 12 is just positioned in the groove 102, the sealing connection of the first cover 3 and the first opening 101 is ensured, and gas is prevented from leaking from the connection part of the first cover 3 and the first opening 101; a plurality of filter screens 4 are sequentially arranged in the purifying box 1 from left to right; a clamping strip 5 for clamping the filter screen 4 is arranged on one opposite inner wall of the purifying box 1; the clamping strips 5 are respectively positioned at two sides of the filter screen 4; the inner side surface of the first box cover 3 is provided with clamping sleeves 6 which correspond to the filter screens 4 one by one, as shown in fig. 3. An air inlet 7 is arranged on the left side wall of the purifying box 1; the right side wall of the purifying box 1 is provided with an air outlet 8; specifically, the filter screen 4 can be fixed through the clamping strips 5 on the two sides of the filter screen 4, and meanwhile, the filter screen 4 can be conveniently taken out, replaced and cleaned when more impurities are accumulated on the surface of the filter screen 4, and the filter screen 4 can be upwards drawn out before being taken out; can make filter screen 4 and first case lid 3 have certain leakproofness through setting up cutting ferrule 6, reduce gaseous sample and spill from the junction of filter screen 4 and first case lid 3, make for the leakproofness cutting ferrule 6 optional elastic rubber that improves cutting ferrule 6 and filter screen 4 junction.

The drying box 2 is positioned at one side of the purifying box 1; a steel wire mesh 9 is arranged in the drying box 2; silica gel dry particles 14 are laid on the steel wire mesh 9; the air outlet 8 is communicated with the drying box 2 through a first air guide pipeline 10, and one end of the first air guide pipeline 10 is positioned below the steel wire mesh 9; the top of the drying box 2 is provided with an exhaust hole; the exhaust hole is communicated with a second air duct 11.

The filter screen 4 is sequentially a first filter screen, a second filter screen, a third filter screen, a fourth filter screen, a fifth filter screen and a sixth filter screen from left to right; the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are all stainless steel filter screens, and the diameters of meshes are reduced in sequence; the fifth filter screen and the sixth filter screen are both activated carbon filter screens, and the diameters of the meshes of the activated carbon filter screens are the same.

Wherein, the top of the drying box 2 is provided with a second opening; a second cover 13 is hermetically arranged on the second opening. Specifically, one side of the drying box 2 may be provided with an observation window or the whole drying box 2 may be transparent; the change of silica gel dry granule 14 is conveniently observed, and the silica gel dry granule 14 is convenient for change in time when reaching saturation. The silica gel dry particles 14 are selected from blue silica gel desiccants; the blue silica gel desiccant is blue in a dry state, gradually turns red along with the increase of absorbed moisture, and after the blue silica gel desiccant is completely turned red, the adsorption saturation of the desiccant is proved, and the blue silica gel desiccant needs to be replaced in time.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The chromatograph gas purification and filtration device is characterized by comprising a purification box (1) and a drying box (2);

the upper end of the purification box (1) is provided with a first opening (101); a first box cover (3) is arranged on the first opening (101), and the first box cover (3) is connected with the first opening (101) in a sealing manner; a plurality of filter screens (4) are sequentially arranged in the purifying box (1) from left to right; a clamping strip (5) for clamping the filter screen (4) is arranged on one opposite inner wall of the purification box (1); the clamping strips (5) are respectively positioned at two sides of the filter screen (4); the inner side surface of the first box cover (3) is provided with clamping sleeves (6) which correspond to the filter screens (4) one by one; an air inlet (7) is arranged on the left side wall of the purification box (1); an air outlet (8) is arranged on the right side wall of the purification box (1);

the drying box (2) is positioned at one side of the purifying box (1); a steel wire mesh (9) is arranged in the drying box (2); silica gel dry particles (14) are paved on the steel wire mesh (9); the air outlet (8) is communicated with the drying box (2) through a first air guide pipeline (10), and one end of the first air guide pipeline (10) is positioned below the steel wire mesh (9); the top of the drying box (2) is provided with an exhaust hole; the exhaust hole is communicated with a second air duct (11).

2. A chromatograph gas purification filtration device according to claim 1, characterized in that the upper end of said purification box (1) is provided with a groove (102); the groove (102) is arranged along the circumferential direction of the first opening (101); and a rubber bulge (12) matched with the groove (102) is arranged on the inner side surface of the first box cover (3).

3. Chromatograph gas purification filtration device according to claim 2, characterized in that said first cover (3) is snap-fitted to said purification box (1).

4. The chromatograph gas purification filtering device according to claim 1, wherein the filter screen (4) is a first filter screen, a second filter screen, a third filter screen, a fourth filter screen, a fifth filter screen and a sixth filter screen in sequence from left to right; the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are all stainless steel filter screens, and the diameters of meshes are reduced in sequence; the fifth filter screen and the sixth filter screen are both activated carbon filter screens, and the mesh diameters of the activated carbon filter screens are the same.

5. Chromatograph gas purification filtration device according to claim 1, characterized in that a second opening is opened at the top of said drying box (2); and a second box cover (13) is arranged on the second opening in a sealing way.