Gas chromatograph based on pressure intelligent controller technology

Abstract

The utility model discloses a gas chromatograph based on a pressure intelligent controller technology, which belongs to the technical field of gas chromatographs and comprises a gas chromatograph body, a display screen and a controller are arranged on the gas chromatograph body, and a group of transmission components are assembled on the upper end face of the gas chromatograph body. The gas chromatograph based on the pressure intelligent controller technology has the advantages of high-precision pressure control, high automation, uniform sampling and higher detection result comparability, the arranged transmission assembly is matched with the guide rod cylinder and the extraction cylinder to extract, convey and introduce a sample into a chromatographic column, and the detection accuracy is improved. The detector is arranged to detect all components flowing out of the chromatographic column and output corresponding signals, so that the controller receives the signals and finally displays the signals on the display screen, an analysis result is obtained, high-precision control over the pressure in the chromatographic column is achieved through cooperation of the pressure sensor, the adjusting valve and the controller, and the device is simple in structure and convenient to operate. And the analysis accuracy and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas chromatographs, and particularly relates to a gas chromatograph based on pressure intelligent controller technology. Background Technique

[0002] A gas chromatograph is a commonly used analytical instrument for separating and analyzing compounds in a mixture. It separates the compounds in the mixture into individual compounds and determines their presence and content through detection by a detector. By comparing the retention times and detection signals of the compounds in the sample, the types and contents of the compounds present in the sample can be determined. Gas chromatographs are widely used in many fields, including chemistry, biochemistry, environmental science, food analysis, etc. It is an efficient and precise analytical tool that can quickly analyze the compounds in complex mixtures.

[0003] In the prior art, traditional gas chromatographs have deficiencies in pressure control. It is often difficult to achieve precise pressure regulation, resulting in inaccurate and unstable analysis results. At the same time, when the existing gas chromatographs sample, it is mostly manual sampling by the detection personnel. Manual sampling has a slow efficiency and the amount of the sample is not easy to control, which easily leads to poor comparability of the collected analysis results. Therefore, a gas chromatograph based on pressure intelligent controller technology is proposed to solve the above problems. Content of the Utility Model

[0004] In view of one or more of the above-mentioned defects or improvement requirements in the prior art, the utility model provides a gas chromatograph based on pressure intelligent controller technology, which has the advantages of high-precision pressure control, high automation, uniform sampling, and relatively high comparability of detection results.

[0005] To achieve the above object, the utility model provides a gas chromatograph based on pressure intelligent controller technology, including a gas chromatograph body;

[0006] A display screen and a controller are arranged on the gas chromatograph body;

[0007] The gas chromatograph body has a cavity, and a feed pipe penetrates through the upper end of the gas chromatograph body. A carrier gas cylinder is assembled in the cavity of the gas chromatograph body, and the carrier gas cylinder is connected to the feed pipe through a gas pipe. A chromatographic column is assembled at the lower end of the feed pipe. A pressure sensor is assembled outside the chromatographic column. A conveying pipe is assembled at one end of the chromatographic column. A detector is also assembled in the cavity of the gas chromatograph body, and the detector is connected to the conveying pipe. The pressure sensor and the detector are both electrically connected to the controller;

[0008] A set of transmission components is assembled on the upper end surface of the gas chromatograph body;

[0009] The transmission assembly includes a lead screw base which has a rectangular cavity and a chute on one side. A reciprocating motor is assembled on the upper end face of the lead screw base. The output end of the reciprocating motor is connected with a threaded lead screw, and one end of the threaded lead screw penetrates through the upper end face of the lead screw base. A slider is engaged and slidably arranged on the outer part of the threaded lead screw, and the slider is located in the rectangular cavity of the lead screw base. One side of the slider is located in the chute of the lead screw base and is assembled with a mounting plate on one side.

[0010] As a further improvement of the present utility model, a guide rod cylinder is assembled on one side of the upper end face of the mounting plate. An extraction cylinder is assembled on one side of the lower end face of the mounting plate, and the extraction cylinder has a cavity. The output end of the guide rod cylinder is connected with a piston rod, and the piston rod penetrates through the mounting plate and extends into the cavity of the extraction cylinder. A plug is assembled at the lower end of the piston rod, and the plug is in fit with the inner wall of the cavity of the extraction cylinder.

[0011] As a further improvement of the present utility model, a mounting table is assembled on one side of the upper end face of the gas chromatograph body. A driving motor is assembled on the lower end face of the mounting table. The output end of the driving motor is connected with a rotating rod, and one end of the rotating rod penetrates through the mounting table and is connected with a rotating table. The lead screw base is assembled on the upper end face of the rotating table.

[0012] As a further improvement of the present utility model, a collecting hopper is assembled on the upper end of the feed pipe, and a valve is assembled on the outer part of the upper end of the feed pipe.

[0013] As a further improvement of the present utility model, a sampling cylinder is assembled on one side of the upper end face of the gas chromatograph body.

[0014] As a further improvement of the present utility model, a regulating valve is arranged on the upper end of the gas cylinder, and the regulating valve is electrically connected with the controller.

[0015] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present utility model include:

[0016] 1. The gas chromatograph based on the pressure intelligent controller technology of the present utility model is provided with a chromatographic column for separating each component in the sample to be analyzed. A pressure sensor is arranged outside the chromatographic column to monitor the pressure inside the chromatographic column in real time and feedback the information to the controller. The set controller can control the regulating valve in real time according to the information, so as to control the output value of the gas cylinder, so that the pressure inside the chromatographic column remains constant and accurate. The set transmission component cooperates with the guide rod cylinder and the extraction cylinder to extract and convey the sample and introduce it into the chromatographic column. The set detector detects each component flowing out of the chromatographic column and outputs corresponding signals, so that the controller receives and finally displays it on the display screen, so as to obtain the analysis result. Through the cooperation of the pressure sensor, the regulating valve and the controller, the device realizes the high-precision control of the pressure inside the chromatographic column, improves the accuracy and stability of the analysis. The mutual cooperation between each component enables the device to perform detection and analysis when unattended, reduces the operation difficulty and improves the work efficiency.

[0017] 2. The gas chromatograph based on the pressure intelligent controller technology of the present utility model, through the mutual cooperation between the components inside the transmission component, can drive the guide rod cylinder and the extraction cylinder to slide radially within the stroke range of the threaded lead screw by controlling the reciprocating motor, so as to adjust the height. By controlling the guide rod cylinder, the piston rod can be driven upward to form a negative pressure inside the extraction cylinder, so as to extract the sample in the sampling cylinder. By giving a specified output value to the guide rod cylinder, the extraction amount each time can be made consistent, which is convenient for later comparison and analysis of the detection data. By controlling the driving motor, the transmission component, the guide rod cylinder and the extraction cylinder can be driven to rotate, which is convenient for sampling operation, convenient and fast. Description of the Drawings

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

[0019] Figure 2 It is a schematic diagram of the overall installation structure of the present utility model;

[0020] Figure 3 It is a schematic diagram of the overall installation structure of the transmission component of the present utility model;

[0021] Figure 4 It is a schematic sectional view of the installation of the guide rod cylinder, the extraction cylinder and the piston rod of the present utility model.

[0022] In all the drawings, the same reference numerals denote the same technical features, specifically: 1. Gas chromatograph body; 11. Display screen; 12. Controller; 13. Installation table; 14. Driving motor; 15. Turntable; 16. Sampling cylinder; 2. Feed pipe; 21. Carrier gas cylinder; 211. Regulating valve; 22. Collection hopper; 23. Valve; 3. Chromatographic column; 31. Pressure sensor; 32. Delivery pipe; 33. Detector; 4. Transmission assembly; 40. Lead screw base; 41. Reciprocating motor; 42. Threaded lead screw; 43. Slide block; 44. Mounting plate; 5. Guide rod cylinder; 51. Piston rod; 52. Plug; 6. Extraction cylinder. Detailed implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment

[0025] Provided by Figures 1-4 There is a gas chromatograph based on pressure intelligent controller technology, including a gas chromatograph body 1;

[0026] A display screen 11 and a controller 12 are arranged on the gas chromatograph body 1;

[0027] The gas chromatograph body 1 has a cavity, and the upper end of the gas chromatograph body 1 is provided with a feed pipe 2 penetrating through it. A carrier gas cylinder 21 is assembled in the cavity of the gas chromatograph body 1, and the carrier gas cylinder 21 is connected to the feed pipe 2 through a gas pipe. The lower end of the feed pipe 2 is assembled with a chromatographic column 3. A pressure sensor 31 is assembled outside the chromatographic column 3. One end of the chromatographic column 3 is assembled with a delivery pipe 32. A detector 33 is also assembled in the cavity of the gas chromatograph body 1. The detector 33 is connected to the delivery pipe 32. Both the pressure sensor 31 and the detector 33 are electrically connected to the controller 12;

[0028] A set of transmission assemblies 4 are assembled on the upper end surface of the gas chromatograph body 1.

[0029] In this embodiment, the chromatographic column 3 is provided for separating each component in the sample to be analyzed. The pressure sensor 31 arranged outside the chromatographic column 3 is used to monitor the pressure in the chromatographic column 3 in real time and feedback the information to the controller 12. The controller 12 can control the regulating valve 211 in real time according to the information, so as to control the output value of the gas cylinder 21, so that the pressure in the chromatographic column 3 is kept constant and accurate. The transmission assembly 4 cooperates with the guide rod cylinder 5 and the extraction cylinder 6 to extract and transport the sample and introduce it into the chromatographic column 3. The detector 33 arranged detects each component flowing out of the chromatographic column 3 and outputs corresponding signals, so that the controller 12 receives and finally displays on the display screen 11, so as to obtain the analysis result. Through the cooperation of the pressure sensor 31, the regulating valve 211 and the controller 12, the device realizes the high-precision control of the pressure in the chromatographic column 3, improves the accuracy and stability of the analysis. The mutual cooperation between each component enables the device to perform detection and analysis when unattended, reduces the operation difficulty and improves the work efficiency.

[0030] Specifically, referring to Figures 1-4 , the transmission assembly 4 includes a lead screw base 40. The lead screw base 40 has a rectangular cavity and a chute is arranged on one side. A reciprocating motor 41 is assembled on the upper end surface of the lead screw base 40. The output end of the reciprocating motor 41 is connected with a threaded lead screw 42, and one end of the threaded lead screw 42 penetrates through the upper end surface of the lead screw base 40. A slider 43 is engaged and slid on the outside of the threaded lead screw 42, and the slider 43 is located in the rectangular cavity of the lead screw base 40. One side of the slider 43 is located in the chute of the lead screw base 40 and one side is assembled with a mounting plate 44;

[0031] One side of the upper end surface of the mounting plate 44 is assembled with a guide rod cylinder 5. One side of the lower end surface of the mounting plate 44 is assembled with an extraction cylinder 6, and the extraction cylinder 6 has a cavity. The output end of the guide rod cylinder 5 is connected with a piston rod 51, and the piston rod 51 penetrates through the mounting plate 44 and extends into the cavity of the extraction cylinder 6. A plug 52 is assembled at the lower end of the piston rod 51, and the plug 52 fits with the inner wall of the cavity of the extraction cylinder 6;

[0032] One side of the upper end surface of the gas chromatograph body 1 is assembled with a mounting table 13. A driving motor 14 is assembled on the lower end surface of the mounting table 13. The output end of the driving motor 14 is connected with a rotating rod, and one end of the rotating rod penetrates through the mounting table 13 and is connected with a rotating table 15. The lead screw base 40 is assembled on the upper end surface of the rotating table 15.

[0033] In this embodiment, through the mutual cooperation among the components within the transmission assembly 4, by controlling the reciprocating motor 41, the guide rod cylinder 5 and the extraction cylinder 6 can be driven to slide radially within the stroke range of the threaded lead screw 42 to adjust the height. By controlling the guide rod cylinder 5, the piston rod 51 is driven upward to form a negative pressure within the extraction cylinder 6, thereby extracting the sample within the sampling cylinder 16. By giving the guide rod cylinder 5 a specified output value, the extraction volume can be made consistent each time, facilitating the subsequent comparative analysis of the detection data. By controlling the drive motor 14, the transmission assembly 4, the guide rod cylinder 5, and the extraction cylinder 6 can be driven to rotate, facilitating the sampling operation, which is convenient and fast.

[0034] Further preferably, the provided guide rod cylinder 5 needs to be connected to an external air source and given an output value to the cylinder before use.

[0035] Specifically, referring to Figures 1-2 , a collection hopper 22 is assembled at the upper end of the feed pipe 2, and a valve 23 is assembled outside the upper end of the feed pipe 2.

[0036] In this embodiment, the provided collection hopper 22 is used to collect the sample, and the provided valve 23 is used to control the start and stop of the flow rate.

[0037] Specifically, referring to Figures 1-2 , a sampling cylinder 16 is assembled on one side of the upper end surface of the gas chromatograph body 1.

[0038] In this embodiment, the provided sampling cylinder 16 is used to centrally collect and store the sample, facilitating subsequent sampling.

[0039] Specifically, referring to Figure 2 , a regulating valve 211 is provided at the upper end of the carrier gas cylinder 21, and the regulating valve 211 is electrically connected to the controller 12.

[0040] In this embodiment, the provided regulating valve 211 is used to control the output volume of the carrier gas cylinder 21, thereby ensuring that the air pressure within the chromatographic column 3 is in a constant state.

[0041] The gas chromatograph based on the pressure intelligent controller technology of the present utility model:

[0042] Step 1: During actual use, the tester can pour the sample into the sampling cylinder 16, and then control the set driving motor 14 to drive the turntable 15 to rotate, and drive the transmission assembly 4, the guide rod cylinder 5, and the extraction cylinder 6 installed at the upper end of the turntable 15 to rotate. When the extraction cylinder 6 is located above the sampling cylinder 16, control the set reciprocating motor 41 to drive the threaded lead screw 42 to rotate. When the threaded lead screw 42 rotates, the slider 43 meshed and slidably arranged outside the threaded lead screw 42 drives the mounting plate 44 on one side to slide radially within the stroke range of the threaded lead screw 42. When the extraction cylinder 6 is driven downward and the lower end thereof is inserted into the sample in the extraction cylinder 6, control the set guide rod cylinder 5 to drive the piston rod 51 and the plug 52 at the lower end of the piston rod 51 to move upward, and generate negative pressure in the extraction cylinder 6, and finally extract the sample. Control the reciprocating motor 41 to drive the extraction cylinder 6 to rise, control the driving motor 14 to drive the extraction cylinder 6 to rotate and move, and make the extraction cylinder 6 located above the collection hopper 22. Control the guide rod cylinder 5 to finally make the sample extracted in the extraction cylinder 6 flow into the collection hopper 22;

[0043] Step 2: When the sample is in the collection hopper 22, open the set valve 23 to make the sample in the collection hopper 22 flow into the chromatographic column 3 through the feed pipe 2. Close the valve 23, and then open the regulating valve 211 to make the gas cylinder 21 supply gas and increase the pressure to the feed pipe 2 and the chromatographic column 3, so that the chromatographic column 3 separates each component in the sample to be analyzed. The pressure sensor 31 arranged outside the chromatographic column 3 is used to monitor the pressure in the chromatographic column 3 in real time and feedback the information to the controller 12. The set controller 12 can control the regulating valve 211 in real time according to the information, so as to control the output value of the gas cylinder 21, so that the pressure in the chromatographic column 3 remains constant and accurate. The set detector 33 detects each component flowing out of the chromatographic column 3 and outputs corresponding signals, so that the controller 12 receives and finally displays on the display screen 11, so as to obtain the analysis result.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas chromatograph based on pressure intelligent controller technology, comprising a gas chromatograph body (1), characterized in that: The gas chromatograph body (1) is provided with a display screen (11) and a controller (12); The gas chromatograph body (1) has a cavity and a feed pipe (2) is provided through the upper end of the gas chromatograph body (1); a carrier gas bottle (21) is installed in the cavity of the gas chromatograph body (1) and the carrier gas bottle (21) is connected to the feed pipe (2) through a gas pipe; a chromatographic column (3) is installed at the lower end of the feed pipe (2); a pressure sensor (31) is installed outside the chromatographic column (3); a delivery pipe (32) is installed at one end of the chromatographic column (3); a detector (33) is also installed in the cavity of the gas chromatograph body (1); the detector (33) is connected to the delivery pipe (32); the pressure sensor (31) and the detector (33) are both electrically connected to the controller (12); The upper end surface of the gas chromatograph body (1) is equipped with a group of transmission components (4); The transmission assembly (4) comprises a screw seat (40), the screw seat (40) having a rectangular cavity and a slide groove on one side, the upper end surface of the screw seat (40) is equipped with a reciprocating motor (41), the output end of the reciprocating motor (41) is connected with a threaded screw (42), and one end of the threaded screw (42) passes through the upper end surface of the screw seat (40), the threaded screw (42) is externally meshed and slidably provided with a slider (43), and the slider (43) is located in the rectangular cavity of the screw seat (40), one side of the slider (43) is located in the slide groove of the screw seat (40), and one side is equipped with a mounting plate (44).

2. The gas chromatograph based on pressure intelligent controller technology according to claim 1, characterized in that: A guide rod cylinder (5) is mounted on one side of the upper end surface of the mounting plate (44), an extraction cylinder (6) is mounted on one side of the lower end surface of the mounting plate (44), and the extraction cylinder (6) has a cavity; a piston rod (51) is connected to the output end of the guide rod cylinder (5), and the piston rod (51) passes through the mounting plate (44) and extends into the cavity of the extraction cylinder (6); a plug (52) is mounted on the lower end of the piston rod (51), and the plug (52) is in contact with the inner wall of the cavity of the extraction cylinder (6).

3. The gas chromatograph based on pressure intelligent controller technology according to claim 1, characterized in that: A mounting platform (13) is mounted on one side of the upper end surface of the gas chromatograph body (1), a driving motor (14) is mounted on the lower end surface of the mounting platform (13), a rotating rod is connected to the output end of the driving motor (14), one end of the rotating rod passes through the mounting platform (13) and is connected to the rotating table (15), and the screw seat (40) is mounted on the upper end surface of the rotating table (15).

4. The gas chromatograph based on pressure intelligent controller technology according to claim 1, characterized in that: The upper end of the feed pipe (2) is equipped with a collecting bucket (22), and the outer portion of the upper end of the feed pipe (2) is equipped with a valve (23).

5. The gas chromatograph based on pressure intelligent controller technology according to claim 1, characterized in that: A sampling tube (16) is mounted on one side of the upper end surface of the gas chromatograph body (1).

6. The gas chromatograph based on pressure intelligent controller technology according to claim 1, characterized in that: A regulating valve (211) is provided at the upper end of the carrier gas bottle (21), and the regulating valve (211) is electrically connected to the controller (12).

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