Sample introduction filtering device of gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographs, and discloses a gas chromatograph sample introduction filtering device which comprises an analysis assembly, the analysis assembly comprises a chromatographic instrument, a gas inlet and a gas outlet; a sample inlet is formed in the chromatographic instrument; the device is characterized in that a filtering assembly is arranged on the sample inlet; the filter assembly comprises a fixed plate, a fixed plate and a fixed plate, wherein the fixed plate is arranged on the sample inlet and penetrates through the sample inlet; the limiting block is arranged on the fixing plate; the magnet is arranged on the limiting block and is arranged on the sample inlet; the filter screen is arranged on the fixed plate; and the handle is arranged on the filter screen. The gas chromatograph has the advantages that the two filter screens can be arranged while the filter device is additionally arranged, so that when the filter screens of the gas chromatograph are blocked, the gas chromatograph can be directly and continuously used after the filter screens are simply and conveniently replaced in a push-pull manner, and then the filter screens are cleaned or replaced, and the problems that the disassembly process is too troublesome and tedious, and the disassembly cost is high are solved. And the filter screen can be continuously used after being installed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a gas chromatograph sample inlet filtering device. Background Art

[0002] Gas chromatograph is an analytical instrument used for separation, qualitative and quantitative analysis of organic compounds. Its working principle is to separate a mixture into single substances, and then determine the type and content of the compound by detecting the movement speed and time of the single substance in the separation column. The gas chromatograph is mainly composed of a sample processing system, an injector, a chromatographic column and a detector. Among them, the injector is a device that injects the sample to be tested into the gas chromatograph. In order to protect the chromatographic column and prevent the macromolecular substances in the sample to be tested from damaging the chromatographic column, a filter needs to be set outside the injector to filter the macromolecular substances in the sample to be tested injected into the gas chromatograph.

[0003] In the related art, when the gas chromatograph is performing sample detection, it is necessary to use a needle to draw out the sample, and then inject the sample into the injection port using a needle. When performing gas detection, since there may be impurities or solid particles in the gas sample, the impurities can be filtered through the filter. These impurities may cause blockage in the filter. Although the filter can be disassembled and cleaned at present, the existing technology designs the injection port so that the injection port is detachable, so that the filter can be taken out for cleaning or replacement, but the disassembly process is too cumbersome, and the filter needs to be installed before it can be used again, which has certain limitations. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a gas chromatograph sample injection filter device, which can be equipped with two filter screens while adding a filter device, so that when the filter screen of the chromatograph is blocked, it can also be replaced by pushing and pulling in a simple and convenient way. After the filter screen is replaced, the gas chromatograph can be directly used, and the filter screen can be cleaned or replaced, which solves the problem that the filter screen is blocked during sample injection, the disassembly process is too troublesome and lengthy, and the filter screen needs to be installed before it can be used again.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas chromatograph sample injection filtering device, including an analysis component; the analysis component includes: a chromatograph, on which an injection port is provided; it is characterized in that: a filter component is provided on the injection port; the filter component includes: a fixed plate, which is arranged on the injection port and passes through the injection port; a limit block, which is arranged on the fixed plate; a magnet, which is arranged on the limit block and on the injection port; a filter screen, which is arranged on the fixed plate; and a handle, which is arranged on the filter screen.

[0008] In some embodiments, the injection port and the filter are square.

[0009] In some embodiments, the magnet is a square magnet.

[0010] In some embodiments, the filter screen has a curved surface.

[0011] In some embodiments, the handle is a live nylon filter and a micron filter membrane.

[0012] In some embodiments, the fixing plate is provided with ventilation holes.

[0013] In some embodiments, an auxiliary component is provided on the fixing plate; the auxiliary component includes: a sealing strip, which is provided on the fixing plate; a fixing block, which is provided on the injection port; and a protective shell, which is inserted into the fixing block.

[0014] In some embodiments, the fixing block and the protective shell are provided with curved surfaces.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a gas chromatograph sample inlet filter device, which has the following beneficial effects:

[0017] The gas chromatograph is equipped with a filter device and has two inner and outer filter devices. When the filter device is clogged during the sampling process, the inner and outer filter screens can be replaced more conveniently and quickly by pushing and pulling. The gas chromatograph can work normally first, and then the clogged filter screen can be cleaned or replaced. This solves the problem that the filter screen is clogged during sampling, the disassembly process is too troublesome and lengthy, and the filter screen needs to be installed before it can be used again, which leads to low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the enlarged structure of the sample inlet of the utility model;

[0020] Figure 3It is a schematic diagram of the enlarged structure of some auxiliary components of the utility model.

[0021] In the figure:

[0022] 1. Analytical component; 11. Chromatograph; 12. Inlet;

[0023] 2. Filter assembly; 21. Fixing plate; 22. Limiting block; 23. Magnet; 24. Filter screen; 25. Handle;

[0024] 3. Auxiliary components; 31. Sealing strip; 32. Fixing block; 33. Protective shell. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] After the analysis sample is vaporized in the injection port, it is carried into the chromatographic column by the carrier gas. The components are separated by the chromatographic column with different retention performance for the components in the mixture to be detected, and then introduced into the detector in sequence to obtain the detection signal of each component. According to the order of introduction into the detector, the components can be distinguished by comparison, and the content of each component can be calculated according to the peak height or peak area.

[0029] In the related art, when a gas chromatograph is performing sample detection, it is necessary to use a needle to draw out the sample, and then inject the sample into the injection port using a needle. When performing gas detection, since the gas is easily mixed with impurities, if it is not filtered, it will affect the detection result.

[0030] Combination Figure 1-Figure 3 The embodiment of the present application provides a gas chromatograph sample injection filtering device, including an analysis component 1; the analysis component 1 includes: a chromatograph 11, on which a sample injection port 12 is provided; it is characterized in that: a filter component 2 is provided on the sample injection port 12; the filter component 2 includes: a fixed plate 21, which is arranged on the sample injection port 12 and passes through the sample injection port 12; a limit block 22, which is arranged on the fixed plate 21; a magnet 23, which is arranged on the limit block 22 and on the sample injection port 12; a filter screen 24, which is arranged on the fixed plate 21; a handle 25, which is arranged on the filter screen 24.

[0031] When the gas chromatograph 11 is used, the gas chromatograph 11 is opened, and the gas pipe with the sample is inserted into the gas inlet 12. Then, the sample passes through the inlet 12 and enters the chromatograph 11. After the sample enters the inlet 12, it passes through the filter 24 in the inlet 12. The filter 24 filters the impurities in the sample. When the filter 24 filters enough impurities and causes the filter 24 to be blocked, the limit block 22 can be pushed so that the magnet 23 on the limit block 22 and the magnet 2 in the inlet 12 are aligned. 3, driving the limit block 22 to move, the limit block 22 drives the fixing plate 21 to move, and the outer filter 24 is moved to the inner side of the injection port 12, and at the same time, the magnet 23 on the other end of the limit block 22 is fixed with the magnet 23 in the injection port 12 to ensure the normal operation of the machine, and then, pull the handle 25 upward to drive the filter 24, take out the filter 24 for cleaning or replacement, and then repeat the above steps, and the filter 24 can be put back into the injection port 12 again. After use, turn off the gas chromatograph 11.

[0032] Specifically, the principle of the gas chromatograph 11 is based on the difference in the distribution coefficients of different substances in two phases in relative motion. When these substances move with the mobile phase, they will be repeatedly distributed in the two phases, so that the components with only slight differences in the original distribution coefficients can be well separated. Then, these separated compounds enter the detector in turn for measurement to achieve the purpose of separating and analyzing the components.

[0033] In some embodiments, the injection port 12 and the filter screen 24 are square in shape to increase the filtering area.

[0034] In some embodiments, the magnet 23 is a square magnet to increase the adsorption area and make the device more stable.

[0035] In some embodiments, the filter screen 24 has a curved surface so that the filter screen 24 can be better fixed to the fixing plate 21 .

[0036] In some embodiments, the handle 25 is a flexible nylon filter and a micron filter membrane to make the filtration cleaner and reduce errors.

[0037] In some embodiments, the fixing plate 21 is provided with air holes so that the fixing plate can provide a certain support to the filter screen 24 without affecting the gas flow.

[0038] In some embodiments, an auxiliary component 3 is provided on the fixing plate 21 ; the auxiliary component 3 includes: a sealing strip 31 , which is provided on the fixing plate 21 ; a fixing block 32 , which is provided on the injection port 12 ; and a protective shell 33 , which is inserted into the fixing block 32 .

[0039] When the magnet 23 on the limit block 22 is fixed to the magnet 23 in the fixed plate 21, the sealing strip 31 is aligned with the injection port 12, so that the injection port 12 is more tightly sealed. At the same time, when the gas chromatograph 11 is not in use, one end of the protective shell 33 can be inserted into the fixed block 32 to fix the protective shell 33 to the fixed block 32.

[0040] In some embodiments, the fixing block 32 and the protective shell 33 are provided with arc surfaces, so that the fixing block 32 and the protective shell 33 can be fixed more conveniently.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0042] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas chromatograph sample inlet filter device, comprising an analysis component (1); the analysis component (1) comprises: A chromatograph (11) having an injection port (12) disposed thereon; The invention is characterized in that: a filter component (2) is provided on the sample inlet (12); the filter component (2) comprises: A fixing plate (21) is disposed on the injection port (12) and passes through the injection port (12); A limit block (22) is arranged on the fixing plate (21); A magnet (23) is arranged on the limiting block (22) and on the injection port (12); A filter screen (24) is arranged on the fixing plate (21); A handle (25) is arranged on the filter screen (24).

2. A gas chromatograph sample inlet filter device according to claim 1, characterized in that: The injection port (12) and the filter screen (24) are square.

3. A gas chromatograph sample inlet filter device according to claim 1, characterized in that: The magnet (23) is a square magnet.

4. A gas chromatograph sample inlet filter device according to claim 1, characterized in that: The filter screen (24) is provided with a curved surface.

5. The gas chromatograph sample inlet filter device according to claim 1, characterized in that: The handle (25) is a live nylon filter and a micron filter membrane.

6. A gas chromatograph sample inlet filter device according to claim 1, characterized in that: The fixing plate (21) is provided with air holes.

7. The gas chromatograph sample inlet filter device according to claim 1, characterized in that: An auxiliary component (3) is provided on the fixing plate (21); the auxiliary component (3) comprises: A sealing strip (31) is arranged on the fixing plate (21); A fixed block (32) is arranged on the injection port (12); The protective shell (33) is inserted into the fixing block (32).

8. A gas chromatograph sample inlet filter device according to claim 7, characterized in that: The fixing block (32) and the protective shell (33) are provided with curved surfaces.

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