Laboratory gas chromatograph sample pretreatment device

Abstract

The utility model provides a sample pretreatment device for a laboratory gas chromatograph. The sample pretreatment device comprises a supporting mechanism and a treatment mechanism, the supporting mechanism comprises a base, four supporting rods and a supporting plate, the four supporting rods are fixedly connected to the top face of the base, and one end of each supporting rod is fixedly connected with the supporting plate; the processing mechanism comprises a dissolving container and a sealing cover, the sealing cover is installed at the top of the dissolving container in a threaded mode, a limiting ring is integrally formed on one side of the dissolving container, the dissolving container is arranged on one side of the supporting plate, and a drainage opening is integrally formed in one side of the dissolving container; the driving motor is arranged to drive the rotating disc to rotate, so that the rotating disc drives the stirring rod to stir and mix a solvent and a solid sample in the dissolving container, the solid sample is fully dissolved, the dissolved sample is poured through the drainage opening, and solid residues in the sample are filtered out through the filter screen when the sample is discharged; and residues are prevented from entering the joint of the EPC and the gas pipeline of the gas chromatograph.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pretreatment device, in particular to a laboratory gas chromatograph sample pretreatment device belongs to sample pretreatment technical field. BACKGROUND

[0002] The gas chromatograph is the instrument that utilizes chromatographic separation technology and detection technology, carries out qualitative and quantitative analysis to the complex mixture of multicomponent, can be used to analyze the soil organic matter such as volatile organic compound, organochlorine, organophosphorus, polycyclic aromatic hydrocarbon, phthalate ester etc. that heat is stable and boiling point is not more than 500 DEG C, the types of gas chromatograph are various, and the functions are different, but its basic structure is similar, and the gas chromatograph is generally composed of gas path system, sampling system, separation system (chromatographic column system), detection and temperature control system, recording system;

[0003] According to the state of sample, different sample injectors are used, and the sample injection of liquid sample generally uses microsyringe, and the sample injection of gas sample commonly uses push-pull type six-way valve or rotary type six-way valve configured by the chromatograph, and the solid sample is generally dissolved in proper reagent first, and then is injected by microsyringe, however, the solid sample is not fully dissolved in the prior art, so that when the sample is injected, the solid residue enters the EPC and gas pipeline interface of the gas chromatograph, and the EPC part is blocked or the sample inlet pressure is changed;

[0004] To solve the above technical problems, a laboratory gas chromatograph sample pretreatment device is provided. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a laboratory gas chromatograph sample pretreatment device to solve or alleviate the technical problems in the prior art, and at least provides a beneficial choice.

[0006] The technical scheme of the utility model is as follows: a laboratory gas chromatograph sample pretreatment device, comprising a supporting mechanism and a processing mechanism.

[0007] The supporting mechanism comprises a base, supporting rods and a supporting plate, four supporting rods are fixedly connected to the top surface of the base, and one end of the supporting rod is fixedly connected with the supporting plate.

[0008] The processing mechanism comprises a dissolving container and a cover, the cover is threadedly mounted on the top of the dissolving container, a limiting ring is integrally formed on one side of the dissolving container, the dissolving container is arranged on one side of a supporting plate, a drainage port is integrally formed on one side of the dissolving container, a filter screen is fixedly connected in the drainage port, a driving motor is mounted on one side of the cover, an output shaft of the driving motor penetrates through the cover and is rotationally connected with the cover, a rotating disc is fixedly connected on the end of the output shaft of the driving motor penetrating through the cover, and stirring rods are fixedly and equidistantly connected on the bottom surface of the rotating disc.

[0009] Further preferably, a liquid outlet nozzle is sleeved on one end of the drainage port, a drainage rod is integrally formed on one side of the liquid outlet nozzle, and the liquid outlet nozzle is communicated with the drainage port.

[0010] Further preferably, a second sealing ring is fixedly connected on one side of the drainage port, and the second sealing ring is engaged with the liquid outlet nozzle.

[0011] Further preferably, a limiting sleeve is sleeved on one side of the dissolving container, and the top surface of the limiting sleeve is fixedly connected with the supporting plate.

[0012] Further preferably, scales are integrally formed on one side of the dissolving container.

[0013] Further preferably, a first sealing ring is fixedly connected on one side of the inside of the cover, and the first sealing ring is engaged with the inner wall of the dissolving container.

[0014] Further preferably, a heating plate is mounted on one side of the base.

[0015] The embodiment of the present application has the following advantages by adopting the above technical scheme.

[0016] Firstly, the driving motor drives the rotating disc to rotate, the rotating disc drives the stirring rods to stir and mix the solvent and the solid sample in the dissolving container, the solid sample is fully dissolved, and the dissolved sample is poured through the drainage port, the filter screen filters out the solid residues in the sample when the sample is discharged, and the residues are prevented from entering the EPC and gas pipeline interface of the gas chromatograph.

[0017] Secondly, the heating plate heats the bottom of the dissolving container, and provides a suitable dissolving temperature for the solid sample.

[0018] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above described illustrative aspects, embodiments, and features, further aspects, embodiments, and features of the present application will be readily apparent from the drawings and detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 The structural diagram of the present application;

[0021] Figure 2 The connection structure diagram of the base in the present application;

[0022] Figure 3 The sectional view structure diagram of the cover in the present application;

[0023] Figure 4 The installation structure diagram of the liquid outlet nozzle in the present application;

[0024] Figure 5 The sectional view structure diagram of the dissolving container in the present application.

[0025] The drawings show that: 10, support mechanism; 11, base; 12, support rod; 13, supporting plate; 14, limiting sleeve; 15, heating plate; 20, processing mechanism; 21, dissolving container; 22, cover; 23, driving motor; 24, drainage port; 25, liquid outlet nozzle; 26, limiting ring; 27, scale; 28, first sealing ring; 29, turntable; 31, stirring rod; 32, second sealing ring; 33, drainage rod; 34, filter screen. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are simply described. As those skilled in the art can realize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are considered to be exemplary rather than limiting.

[0027] The embodiments of the present application will be described in detail below with reference to the drawings.

[0028] As Figures 1-5 shown, the present application provides a laboratory gas chromatograph sample pretreatment device, which is composed of a support mechanism 10 and a processing mechanism 20.

[0029] The support mechanism 10 comprises a base 11, support rods 12 and a supporting plate 13, four support rods 12 are fixedly connected to the top surface of the base 11, the support rods 12 are fixedly connected to the four corners of the base 11, the distance between every two adjacent support rods 12 is the same, one end of the support rod 12 is fixedly connected to the supporting plate 13, the bottom of the supporting plate 13 is fixedly connected to a limiting sleeve 14, which is used for righting the dissolving container 21.

[0030] In one embodiment, in order to facilitate providing a suitable dissolving temperature for the solid sample when it is dissolved, a heating plate 15 is installed on one side of the base 11.

[0031] The processing mechanism 20 comprises a dissolving container 21 and a cover 22, the cover 22 is threadedly installed on the top of the dissolving container 21, the dissolving container 21 is integrally formed with a limiting ring 26 on one side, the dissolving container 21 is arranged on one side of the supporting plate 13, the limiting ring 26 is in contact with the supporting plate 13, the outer side wall of the dissolving container 21 is in close contact with the limiting sleeve 14, so that the dissolving container 21 is supported by the supporting plate 13 cooperating with the support rods 12, the dissolving container 21 is integrally formed with a drainage port 24 on one side, the inside of the drainage port 24 is fixedly connected with a filter screen 34, which is used for filtering out the solid residues when the liquid sample is discharged, the cover 22 is installed with a driving motor 23 on one side, the output shaft of the driving motor 23 penetrates through the cover 22 and is rotatably connected with the cover 22, the output shaft of the driving motor 23 penetrates through the cover 22 and is fixedly connected with a rotating disc 29 on one end, the rotating disc 29 is fixedly connected with stirring rods 31 equidistantly distributed on the bottom surface, the rotating disc 29 is driven to rotate by the driving motor 23, so that the stirring rods 31 on one side of the rotating disc 29 mix the solvent and the solid sample, thereby improving the dissolving efficiency.

[0032] In one embodiment, in order to facilitate the drainage of the liquid sample, the drainage port 24 is sleeved with a liquid outlet nozzle 25 on one end, the liquid outlet nozzle 25 is integrally formed with a drainage rod 33 on one side, the liquid outlet nozzle 25 is in communication with the drainage port 24, the liquid outlet nozzle 25 and the drainage rod 33 are integrally formed with drainage grooves on one side, which are used for guiding the liquid sample.

[0033] In one embodiment, in order to enhance the sealing performance of the connection between the liquid outlet nozzle 25 and the drainage port 24, a second sealing ring 32 is fixedly connected on one side of the drainage port 24, which is engaged with the liquid outlet nozzle 25.

[0034] In one embodiment, in order to facilitate confirming the amount of solvent inside the dissolving container 21, a scale 27 is integrally formed on one side of the dissolving container 21, the dissolving container 21 is made of transparent glass material.

[0035] In one embodiment, in order to enhance the sealing performance of the connection between the cover 22 and the dissolving container 21, a first sealing ring 28 is fixedly connected on one side of the inside of the cover 22, which is engaged with the inner wall of the dissolving container 21.

[0036] The utility model discloses a work time: the limit ring 26 is contacted with the supporting plate 13 with the dissolving container 21 is placed on the supporting plate 13, and the dissolving container 21 outer wall is pasted with the limit sleeve 14, and the specified amount of solvent is put into the dissolving container 21, and the solid sample is put into the dissolving container 21, and the cover 22 is connected with the dissolving container 21, and the driving motor 23 is started to drive the rotating disc 29 rotation, and the rotating disc 29 drives the stirring rod 31 to stir and mix the solvent and solid sample, and the solid sample is rapidly reacted and dissolved with the solvent, and the temperature is improved through the heating plate 15, to meet the dissolving demand of part solid sample, and after dissolving, the dissolving container 21 is taken down and is inclined, and the liquid sample after dissolving is poured through the drainage port 24, and when the liquid sample passes through the filter screen 34, the solid residue in the liquid sample is filtered out through the filter screen 34, and the liquid sample is discharged through the liquid outlet 25 and flows along the drainage rod 33, and the liquid sample is guided into the microinjector, and the liquid sample is injected into the gas chromatograph through the microinjector.

[0037] The above is only the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, and anyone skilled in the art can easily think of various changes or replacements within the technical range disclosed by the utility model, and these should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope of the claims.

Claims

1. A sample pretreatment device for a laboratory gas chromatograph, characterized in that: It includes a support structure (10) and a processing structure (20); The support mechanism (10) includes a base (11), support rods (12) and a support plate (13). All four support rods (12) are fixedly connected to the top surface of the base (11), and one end of each support rod (12) is fixedly connected to the support plate (13). The processing mechanism (20) includes a dissolving container (21) and a cap (22). The cap (22) is threaded onto the top of the dissolving container (21). A limiting ring (26) is integrally formed on one side of the dissolving container (21). The dissolving container (21) is located on one side of the tray (13). A drain port (24) is integrally formed on one side of the dissolving container (21). A filter screen (34) is fixedly connected inside the drain port (24). A drive motor (23) is installed on one side of the cap (22). The output shaft of the drive motor (23) passes through the cap (22) and is rotatably connected to the cap (22). A turntable (29) is fixedly connected to one end of the output shaft of the drive motor (23) that passes through the cap (22). Stirring rods (31) are fixedly connected at equal intervals on the bottom surface of the turntable (29).

2. The sample pretreatment device for a laboratory gas chromatograph according to claim 1, characterized in that: One end of the drainage port (24) is fitted with a liquid outlet (25), and a drainage rod (33) is integrally formed on one side of the liquid outlet (25). The liquid outlet (25) is connected to the drainage port (24).

3. The sample pretreatment device for a laboratory gas chromatograph according to claim 2, characterized in that: A second sealing ring (32) is fixedly connected to one side of the drainage port (24), and the second sealing ring (32) engages with the liquid outlet (25).

4. The sample pretreatment device for a laboratory gas chromatograph according to claim 1, characterized in that: A limiting sleeve (14) is fitted on one side of the dissolving container (21), and the top surface of the limiting sleeve (14) is fixedly connected to the tray (13).

5. The sample pretreatment device for a laboratory gas chromatograph according to claim 1, characterized in that: The dissolving container (21) has integrally formed graduations (27) evenly distributed on one side.

6. The sample pretreatment device for a laboratory gas chromatograph according to claim 1, characterized in that: A first sealing ring (28) is fixedly connected to the inside side of the cap (22), and the first sealing ring (28) engages with the inner wall of the dissolving container (21).

7. The sample pretreatment device for a laboratory gas chromatograph according to claim 1, characterized in that: A heating plate (15) is installed on one side of the base (11).

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