Sample introduction device of gas chromatograph

Abstract

The utility model discloses a gas chromatograph sampling device which comprises a bottom plate and a processing assembly, and the processing assembly is arranged on the bottom plate; the treatment assembly comprises a frame, a filter cartridge, a motor, an air inlet pipe and an exhaust pipe; the frame is fixedly connected to the bottom plate, a sample injection cylinder is fixedly connected to the frame, a push rod is arranged in the sample injection cylinder, the bottom end of the push rod is fixedly connected with a piston, and the piston is slidably connected in the sample injection cylinder; the filter cartridge is connected to the bottom end of the sampling cartridge in a penetrating manner, a plurality of filter plates are fixedly connected in the filter cartridge, and a connecting pipe is fixedly connected to the bottom end of the filter cartridge; the motor is fixedly connected to the bottom of the frame. According to the device disclosed by the utility model, gasified high-boiling-point substances can be condensed and absorbed, and insoluble solid particles can be separated from liquid in a sample by arranging the processing assembly, so that the problem that the device is blocked due to the high-boiling-point substances and the insoluble solid particles is avoided.

Description

Technical Field

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

[0002] The injection device of the gas chromatograph is a crucial part of the analysis process. It is responsible for accurately and reliably introducing the pre-treated sample into the chromatographic column. This device ensures that the sample can smoothly enter the chromatographic system for subsequent separation and detection, thereby obtaining accurate analysis results. The accuracy and stability of the injection device are crucial to ensure the effectiveness of the entire analysis process.

[0003] The utility model with the authorization publication number CN213875556U provides a sample injection device for a gas chromatograph, which belongs to the technical field of "gas chromatograph" and the protected claim: "It includes a first vaporization chamber, a first heating wire is provided inside the shell of the first vaporization chamber, a sample injection port is provided on one side of the top of the first vaporization chamber, a reflux absorption mechanism is provided on one side of the top of the first vaporization chamber, and the reflux absorption mechanism includes a reflux pipe, the reflux pipe is clamped with the first vaporization chamber, and a sealing gasket is provided between the reflux pipe and the first vaporization chamber. The utility model performs a first vaporization on the sample by providing a first vaporization chamber, and a reflux absorption mechanism is provided to reflux and absorb high-boiling-point substances, and performs a second vaporization on the sample by providing a second vaporization chamber, and a second activated carbon is provided to absorb a small amount of residual high-boiling-point substances. Since the high-boiling-point substances are absorbed, the intake pipe will not be blocked. The device is conducive to improving the injection efficiency, effectively preventing the intake pipe from being blocked, and is conducive to extending the service life."

[0004] In this device, although the high-boiling-point substances can be removed to prevent the intake device from being blocked, in addition to the high-boiling-point substances, the sample contains insoluble solid particles, which can also block the injection device. For this reason, we propose a gas chromatograph injection device. Utility Model Content

[0005] The utility model aims to provide a gas chromatograph sample injection device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas chromatograph sampling device comprises a bottom plate and a processing component, wherein the processing component is arranged on the bottom plate;

[0008] The processing assembly includes a frame, a filter cartridge, a motor, an air inlet pipe and an air extraction pipe; the frame is fixedly connected to the base plate, an injection cartridge is fixedly connected to the frame, a push rod is arranged in the injection cartridge, a piston is fixedly connected to the bottom end of the push rod, and the piston is slidably connected in the injection cartridge; the filter cartridge is through-connected to the bottom end of the injection cartridge, a plurality of filter plates are fixedly connected in the filter cartridge, and a connecting pipe is fixedly connected to the bottom end of the filter cartridge; the motor is fixedly connected to the bottom of the frame, a driving end of the motor is fixedly connected to a rotating drum, a rotating cover is rotatably connected to the top of the rotating drum, and the bottom end of the connecting pipe is fixedly connected to the rotating cover; the air inlet pipe is fixedly connected to one side of the connecting pipe; the air extraction pipe is fixedly connected to the other side of the connecting pipe.

[0009] Preferably, a one-way valve is fixedly connected to the outside of the rotating drum, a first pump body is fixedly connected to the bottom plate, and an extraction end of the first pump body is detachably connected to the one-way valve.

[0010] Preferably, a second pump body is fixedly connected to one side of the frame, the second pump body is fixedly connected to the air extraction pipe, and the output end of the second pump body is fixedly connected to a collecting cylinder.

[0011] Preferably, a heating cylinder is fixedly connected to the bottom plate, a heating wire is fixedly connected to the inner wall of the heating cylinder, and the heating cylinder is through-connected to the output end of the first pump body.

[0012] Preferably: a first test tube rack is fixedly connected to the bottom plate, and a first condenser is fixedly connected to the first test tube rack.

[0013] Preferably: a second test tube rack is fixedly connected to the bottom plate, and a second condenser is fixedly connected to the second test tube rack.

[0014] Preferably: a hose is fixedly connected between the second condenser tube and the first condenser tube, and a hose is fixedly connected between the first condenser tube and the heating tube.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. By setting up the processing component, the sample is placed in the injection cylinder, and then the second pump body is started. The second pump body draws air through the suction pipe to clean the air in the processing component. At this time, the sample is pumped, and the piston is driven accordingly. Then, a slight pressure is applied downward through the push rod to squeeze the sample downward. The sample is filtered through multiple filter plates, and then the filtered sample is input from the filter cylinder through the connecting pipe into the rotating cylinder. At the same time, inert gas is input through the air inlet pipe for protection, and then the motor is started. The motor drives the rotating cylinder to rotate, and the insoluble solid particles are separated from the liquid through the centrifugal force. In summary, this device can prevent insoluble solid particles from clogging the injection device.

[0017] 2. By setting a heating tube, a first condenser and a second condenser, the sample after the insoluble solid particles are separated is input into the heating tube through the first pump body, and the heating wire is heated to evaporate the sample. Then the gas enters the first condenser through a hose, is condensed through the first condenser, and then enters the second condenser through another hose to condense again. The vaporized high-boiling point substances are condensed and then absorbed by the activated carbon arranged in the first condenser and the second condenser. In summary, the device can condense the vaporized high-boiling point substances to avoid blocking the sampling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the processing component in the utility model;

[0020] Figure 3 This utility model Figure 1 A front view of

[0021] Figure 4 This utility model Figure 3 Enlarged view of point A.

[0022] In the figure: 1, bottom plate; 2, processing assembly; 201, frame; 202, injection tube; 203, push rod; 204, piston; 205, filter tube; 206, filter plate; 207, connecting pipe; 208, motor; 209, rotating drum; 210, rotating cover; 211, air inlet pipe; 212, exhaust pipe; 301, one-way valve; 302, first pump body; 401, second pump body; 402, collecting tube; 501, heating tube; 502, heating wire; 601, first test tube rack; 602, first condenser; 701, second test tube rack; 702, second condenser; 8, hose. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0024] like Figure 1-4 As shown, in this embodiment, a gas chromatograph sampling device includes a base plate 1 and a processing component 2, and the processing component 2 is arranged on the base plate 1;

[0025] The processing assembly 2 includes a frame 201, a filter cartridge 205, a motor 208, an air inlet pipe 211 and an air extraction pipe 212; the frame 201 is fixedly connected to the bottom plate 1, the frame 201 is fixedly connected to the injection cartridge 202, a push rod 203 is arranged in the injection cartridge 202, the bottom end of the push rod 203 is fixedly connected to a piston 204, and the piston 204 is slidably connected in the injection cartridge 202; the filter cartridge 205 is connected to the bottom end of the injection cartridge 202, and the filter cartridge 205 is fixed in the injection cartridge 202. A plurality of filter plates 206 are connected, and a connecting pipe 207 is fixedly connected to the bottom end of the filter cylinder 205; a motor 208 is fixedly connected to the bottom of the frame 201, a driving end of the motor 208 is fixedly connected to a rotating drum 209, a rotating cover 210 is rotatably connected to the top of the rotating drum 209, and the bottom end of the connecting pipe 207 is fixedly connected to the rotating cover 210; an air inlet pipe 211 is fixedly connected to one side of the connecting pipe 207; and an air exhaust pipe 212 is fixedly connected to the other side of the connecting pipe 207.

[0026] During specific implementation, the sample is placed in the injection tube 202, and then the second pump body 401 is started. The second pump body 401 draws air through the exhaust pipe 212 to clean the air in the processing component 2. At this time, the sample is pumped, and the piston 204 is driven accordingly. Then, a slight pressure is applied downward through the push rod 203 to squeeze the sample downward. The sample is filtered through multiple filter plates 206, and then the filtered sample is input from the filter tube 205 into the rotating drum 209 through the connecting tube 207. At the same time, inert gas is input through the air inlet pipe 211 for protection. Then the motor 208 is started, and the motor 208 drives the rotating drum 209 to rotate. The insoluble solid particles are separated from the liquid through the centrifugal force.

[0027] In addition, it should be noted that the rotating seal between the rotating drum 209 and the rotating cover 210 is configured as a mechanical seal, which consists of a rotating ring and a fixed ring, wherein the rotating ring is mounted on the rotating cover 210, and the fixed ring is fixed in the rotating drum 209. When rotating, a tiny sealing surface is formed between the rotating ring and the fixed ring, and the sealing effect is achieved through the relative movement of the two sealing surfaces. Mechanical rotating seals are existing technologies and will not be described in detail.

[0028] like Figure 1 As shown, further, a one-way valve 301 is fixedly connected to the outside of the rotating drum 209, and a first pump body 302 is fixedly connected to the bottom plate 1. The extraction end of the first pump body 302 is detachably connected to the one-way valve 301. When the rotating drum 209 rotates, the extraction end of the first pump body 302 is removed. Since the one-way valve 301 is provided, sample leakage can be avoided during disassembly.

[0029] like Figure 1As shown, further, a second pump body 401 is fixedly connected to one side of the frame 201, the second pump body 401 is fixedly connected to the exhaust pipe 212, and the output end of the second pump body 401 is fixedly connected to the collecting tube 402. After the second pump body 401 draws air through the exhaust pipe 212, a portion of the sample will be directly drawn out of the processing component 2. At this time, the drawn sample can be discarded and directly input into the collecting tube 402 for removal after it is full.

[0030] In addition, it should be noted that valve bodies are provided in the collecting tube 402, the injection tube 202 and the air inlet pipe 211, so as to prevent the sample from being accidentally extracted into other structures after the corresponding operation is completed. Embodiment 2

[0031] On the basis of the first embodiment, in order to make up for the problem of needing to process high boiling point substances in the first embodiment, a heating tube 501, a first condenser tube 602 and a second condenser tube 702 are provided.

[0032] like Figure 3 and Figure 4 As shown, a heating tube 501 is fixedly connected to the bottom plate 1, a heating wire 502 is fixedly connected to the inner wall of the heating tube 501, and the heating tube 501 is through-connected to the output end of the first pump body 302; a first test tube rack 601 is fixedly connected to the bottom plate 1, and a first condenser 602 is fixedly connected to the first test tube rack 601; a second test tube rack 701 is fixedly connected to the bottom plate 1, and a second condenser 702 is fixedly connected to the second test tube rack 701; a hose 8 is fixedly connected between the second condenser 702 and the first condenser 602, and a hose 8 is fixedly connected between the first condenser 602 and the heating tube 501.

[0033] During specific implementation, the sample after the insoluble solid particles are separated is input into the heating tube 501 through the first pump body 302, and the heating wire 502 is heated to evaporate the sample. Then the gas enters the first condenser 602 through a hose 8, is condensed through the first condenser 602, and then enters the second condenser 702 through another hose 8 to be condensed again. The vaporized high-boiling point substances are condensed and then absorbed by the activated carbon arranged in the first condenser 602 and the second condenser 702.

[0034] Working principle: firstly, put the sample into the injection tube 202, then start the second pump body 401, the second pump body 401 extracts air through the suction pipe 212, and extracts the air in the processing component 2. At this time, the sample is pumped, and the piston 204 is driven accordingly. Then, a slight pressure is applied downward through the push rod 203 to squeeze the sample downward. The sample is filtered through multiple filter plates 206, and then the filtered sample is input from the filter tube 205 through the connecting tube 207 to the rotating drum 209. At the same time, inert gas is input through the air inlet pipe 211 for protection, and then the motor 208 is started. The motor 208 drives the drum 209 to rotate, and the insoluble solid particles are separated from the liquid through the centrifugal force. Then the sample is input into the heating drum 501 through the first pump body 302. The heating wire 502 heats the sample to evaporate it. Then the gas enters the first condenser tube 602 through a hose 8, condenses through the first condenser tube 602, and then enters the second condenser tube 702 through another hose 8 to condense again. A very small amount of vaporized high-boiling point substances are condensed and then absorbed by the activated carbon arranged in the first condenser tube 602 and the second condenser tube 702.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas chromatograph sample injection device, comprising a base plate (1) and a processing component (2), characterized in that: The processing component (2) is arranged on the bottom plate (1); The processing assembly (2) comprises a frame (201), a filter cartridge (205), a motor (208), an air intake pipe (211) and an air extraction pipe (212); the frame (201) is fixedly connected to the bottom plate (1); a sample injection cartridge (202) is fixedly connected to the frame (201); a push rod (203) is arranged in the sample injection cartridge (202); a piston (204) is fixedly connected to the bottom end of the push rod (203); the piston (204) is slidably connected in the sample injection cartridge (202); the filter cartridge (205) is connected to the bottom end of the sample injection cartridge (202); the filter cartridge (205) is connected to the bottom end of the sample injection cartridge (202); the filter cartridge (20 5) a plurality of filter plates (206) are fixedly connected therein, and the bottom end of the filter cylinder (205) is fixedly connected to a connecting pipe (207); the motor (208) is fixedly connected to the bottom of the frame (201), the driving end of the motor (208) is fixedly connected to a rotating drum (209), the top of the rotating drum (209) is rotatably connected to a rotating cover (210), and the bottom end of the connecting pipe (207) is fixedly connected to the rotating cover (210); the air inlet pipe (211) is fixedly connected to one side of the connecting pipe (207); and the air extraction pipe (212) is fixedly connected to the other side of the connecting pipe (207).

2. A gas chromatograph sample injection device according to claim 1, characterized in that: The outside of the rotating drum (209) is fixedly connected to a one-way valve (301), the bottom plate (1) is fixedly connected to a first pump body (302), and an extraction end of the first pump body (302) is detachably connected to the one-way valve (301).

3. A gas chromatograph sample injection device according to claim 1, characterized in that: A second pump body (401) is fixedly connected to one side of the frame (201), the second pump body (401) is fixedly connected to the air extraction pipe (212), and the output end of the second pump body (401) is fixedly connected to a collection cylinder (402).

4. A gas chromatograph sample injection device according to claim 1, characterized in that: A heating cylinder (501) is fixedly connected to the bottom plate (1), a heating wire (502) is fixedly connected to the inner wall of the heating cylinder (501), and the heating cylinder (501) is through-connected to the output end of the first pump body (302).

5. A gas chromatograph sample injection device according to claim 1, characterized in that: A first test tube rack (601) is fixedly connected to the bottom plate (1), and a first condenser tube (602) is fixedly connected to the first test tube rack (601).

6. A gas chromatograph sample injection device according to claim 1, characterized in that: A second test tube rack (701) is fixedly connected to the bottom plate (1), and a second condenser tube (702) is fixedly connected to the second test tube rack (701).

7. A gas chromatograph sample injection device according to claim 6, characterized in that: A hose (8) is fixedly connected between the second condenser tube (702) and the first condenser tube (602), and a hose (8) is fixedly connected between the first condenser tube (602) and the heating tube (501).

Images