Gas chromatograph

Abstract

The utility model relates to the technical field of detection equipment, in particular to a gas chromatograph convenient for a worker to quickly install a sample introduction bottle, which comprises a gas chromatograph main body, a control device arranged on the gas chromatograph main body, and an automatic liquid sample introduction device arranged on the gas chromatograph main body and used for reducing the mechanical labor capacity of the worker, the automatic liquid sample injection device comprises an automatic sample injector arranged on the gas chromatograph main body and electrically connected with the control device, and a lower sample injection disc rotationally arranged on the gas chromatograph main body through a driving device and used for being matched with the automatic sample injector, and an upper sample injection disc is arranged on the lower sample injection disc through a detachable device; a plurality of needle washing bottle sample placing holes and sample feeding bottle sample placing holes for placing needle washing bottles and sample feeding bottles are respectively formed in the upper sample feeding disc.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a gas chromatograph. Background Art

[0002] Gas chromatograph is widely used in fire investigation, petroleum, chemical industry, biochemistry, medicine and health, food industry, environmental protection, etc. In addition to quantitative and qualitative analysis, it can also determine the physical and chemical constants such as the distribution coefficient, activity coefficient, molecular weight and specific surface area of ​​the sample on the stationary phase. It is an instrument for analyzing and detecting the components in a mixed gas. Most of the current gas chromatographs are equipped with automatic feeding devices to reduce the workload of personnel, but the sample trays of most automatic feeding devices cannot be disassembled. The sample bottle can only be replaced after the test is completed, which is very inconvenient and affects work efficiency. Utility Model Content

[0003] Therefore, in view of the above problems, the utility model proposes a gas chromatograph that is convenient for staff to quickly install a sample injection bottle.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is to provide a gas chromatograph, including a gas chromatograph body, a control device arranged on the gas chromatograph body, and a liquid automatic sampling device arranged on the gas chromatograph body to reduce the mechanical labor of the staff, the liquid automatic sampling device comprising: an automatic sampler arranged on the gas chromatograph body and electrically connected to the control device, a lower sampler tray rotatably arranged on the gas chromatograph body through a driving device for cooperating with the automatic sampler, an upper sampler tray being arranged on the lower sampler tray through a detachable device, and a plurality of needle washing bottle placement holes and injection bottle placement holes for placing needle washing bottles and injection bottles are respectively opened on the upper sampler tray.

[0005] A further improvement is that the detachable device includes: a rotating clamping device arranged between the upper sample tray and the lower sample tray to prevent the upper sample tray from being separated after being installed on the lower sample tray, and an elastic clamping device arranged on the lower sample tray to clamp the upper sample tray so that it cannot rotate.

[0006] A further improvement is that the rotating engaging device includes: a plurality of straight rods arranged on the lower sample tray and having a height higher than that of the upper sample tray, an arc block arranged on the top of the straight rods and having a bottom flush with the top of the upper sample tray, and an arc hole penetrating through the upper sample tray and matching the arc block.

[0007] The further improvement is that the elastic locking device includes: a fixed block arranged at the bottom of the lower sample tray, a sliding channel opened in the fixed block, a sliding hole penetrating the fixed block and the bottom of the lower sample tray, a clamping rod slidably arranged in the sliding hole, a limit block arranged on the clamping rod and located in the sliding channel, a spring sleeved on the clamping rod with one end resisting against the limit block and the other end resisting against the bottom of the sliding channel, a clamping hole opened at the bottom of the upper sample tray for engaging with the clamping rod when the upper sample tray is rotated into place, and the clamping rod is also provided with a handle for facilitating pulling out the clamping rod.

[0008] A further improvement is that a guiding device is provided between the upper sample feeding tray and the lower sample feeding tray so as not to confuse the placement direction when installing the upper sample feeding tray.

[0009] A further improvement is that the guide device includes: a guide column arranged on the lower sample tray, a guide block arranged on the guide column, a guide hole opened on the upper sample tray, and a guide groove opened on the guide hole and larger in size than the locking block for rotation of the upper sample tray.

[0010] A further improvement is that a handle is also provided on the side of the upper sample feeding tray for enabling the user to better take the upper sample feeding tray.

[0011] A further improvement is that the driving device comprises a servo motor which is arranged on the main body of the gas chromatograph and electrically connected to the control device, and the rotating shaft of the servo motor is fixedly connected to the lower sample tray.

[0012] A further improvement is that the control device includes a control panel arranged on the main body of the gas chromatograph.

[0013] A further improvement is that at least four feet are provided at the bottom of the gas chromatograph body for raising the gas chromatograph body to reduce vibration noise of the gas chromatograph body.

[0014] The advantages and beneficial effects of the utility model are:

[0015] The structure is simple and easy to use. The upper sample tray is installed on the lower sample tray through a detachable device, which is convenient for the user to take down the upper sample tray to install the sample bottles and the needle washing bottles, thereby expanding the working space when installing the sample bottles and the needle washing bottles and improving the installation speed. Moreover, the user can prepare multiple upper sample trays in advance. When one of the upper sample trays is working, the sample bottles can be installed on the other upper sample trays, thereby realizing the rapid connection of the use of the gas chromatograph, improving the work efficiency and shortening the total test time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view schematic diagram of a gas chromatograph of the utility model;

[0017] Figure 2 This is a top view schematic diagram of a sample injection plate on a gas chromatograph of the utility model;

[0018] Figure 3 This is a top view schematic diagram of a lower sample injection plate of a gas chromatograph of the utility model;

[0019] Figure 4 This is a schematic diagram of a gas chromatograph rotary clamping device in a clamping state according to the utility model;

[0020] Figure 5 This is a top view schematic diagram of an upper sample injection plate of a gas chromatograph installed on a lower sample injection plate of the utility model;

[0021] Figure 6 This is an enlarged schematic diagram of part A of a gas chromatograph of the utility model;

[0022] In the figure: 1. Gas chromatograph body; 2. Automatic sampler; 3. Lower sample tray; 4. Upper sample tray; 5. Sample hole for needle washing bottle; 6. Sample hole for sample bottle; 7. Straight rod; 8. Arc block; 9. Arc hole; 10. Fixed block; 11. Sliding channel; 12. Sliding hole; 13. Clamping rod; 14. Limiting block; 15. Spring; 16. Clamping hole; 17. Grip; 18. Guide column; 19. Guide block; 20. Guide hole; 21. Guide groove; 22. Handle; 23. Identification number; 24. Control panel; 25. Standing foot; 26. Divider strip. DETAILED DESCRIPTION

[0023] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0024] like Figure 1-Figure 6 As shown, a gas chromatograph comprises a gas chromatograph body 1, a control device arranged on the gas chromatograph body 1, and a liquid automatic sampling device arranged on the gas chromatograph body 1 for reducing the mechanical labor of the staff, wherein the liquid automatic sampling device comprises: an automatic sampler 2 arranged on the gas chromatograph body 1 and electrically connected to the control device, a lower sampler tray 3 rotatably arranged on the gas chromatograph body through a driving device for cooperating with the automatic sampler 2, an upper sampler tray 4 is arranged on the lower sampler tray 3 through a detachable device, and a plurality of needle washing bottle placing holes 5 and a sampler bottle placing hole 6 for placing needle washing bottles and sample injection bottles are respectively opened on the upper sampler tray 4.

[0025] The upper sample tray 4 is also provided with two separation strips 26 for instructing the user to install the needle washing bottle in the needle washing bottle placement hole 5 .

[0026] In order to facilitate the disassembly and installation of the upper sample tray 4, the detachable device includes: a rotating clamping device arranged between the upper sample tray 4 and the lower sample tray 3 to prevent the upper sample tray 4 from being separated after being installed on the lower sample tray 3, and an elastic clamping device arranged on the lower sample tray 3 to clamp the upper sample tray 4 so that it cannot rotate.

[0027] In order to facilitate the installation of the upper sample tray 4 on the lower sample tray 3, the rotating clamping device includes: a plurality of straight rods 7 arranged on the lower sample tray 3 and having a height higher than the upper sample tray 4, an arc block 8 arranged on the top of the straight rods 7 and having a bottom flush with the top of the upper sample tray 4, and an arc hole 9 penetrating through the upper sample tray 4 and matching the arc block 8.

[0028] In order to prevent the arc hole 9 and the arc block 8 from separating after being engaged, the elastic engaging device includes: a fixed block 10 arranged at the bottom of the lower sample tray 3, a sliding channel 11 opened in the fixed block 10, a sliding hole 12 penetrating the fixed block 10 and the bottom of the lower sample tray 3, a clamping rod 13 slidably arranged in the sliding hole 12, a limit block 14 arranged on the clamping rod 13 and located in the sliding channel 11, a spring 15 sleeved on the clamping rod 13 with one end resisting the limit block 14 and the other end resisting the bottom of the sliding channel 11, and a clamping hole 16 opened at the bottom of the upper sample tray 4 for engaging with the clamping rod 13 when the upper sample tray 4 is rotated into place, and the clamping rod 13 is also provided with a handle 17 for facilitating the pulling out of the clamping rod 13.

[0029] In order to facilitate the placement of the upper sample tray 4 in the specified direction, a guide device is also provided between the upper sample tray 4 and the lower sample tray 3 so that the placement direction will not be confused when installing the upper sample tray 4. The guide device includes: a guide column 18 provided on the lower sample tray 3, a guide block 19 provided on the guide column 18, a guide hole 20 opened on the upper sample tray 4, and a guide groove 21 opened on the guide hole 20 and having a size larger than the locking block for the upper sample tray 4 to rotate.

[0030] In order to facilitate a single person to take the upper sample tray 4 , a handle 22 is further provided on the side of the upper sample tray 4 for the user to take the upper sample tray 4 better.

[0031] In order to facilitate identification of the upper sample feeding tray 4 , an identification number 23 is also provided on the upper sample feeding tray 4 .

[0032] In order to facilitate driving the sample tray to rotate, the driving device includes: a servo motor (not shown in the figure) arranged on the gas chromatograph body 1 and electrically connected to the control device, and the rotating shaft of the servo motor is fixedly connected to the lower sample tray 3.

[0033] In order to facilitate the control of the operation of the gas chromatograph, the control device includes: a control panel 24 arranged on the gas chromatograph body 1 .

[0034] In order to facilitate the placement of the gas chromatograph, at least four feet 25 are provided at the bottom of the gas chromatograph body 1 for padding the gas chromatograph body 1 to reduce the vibration noise of the gas chromatograph body 1 .

[0035] Working principle: When in use, insert the needle washing bottle and the injection bottle into the needle washing bottle sample hole 5 and the injection bottle sample hole 6 of the upper injection tray 4, then align the guide block 19 and the guide groove 21, and the arc block 8 and the arc hole 9, and install the upper injection tray 4 straight on the lower injection tray 3. At this time, the clamping rod 13 is displaced by pressure to avoid it. Then the user rotates the upper injection tray 4 so that the arc block 8 is engaged with the upper injection tray 4. At this time, the clamping rod 13 is aligned with the clamping hole 16 and reset, and the installation is completed.

[0036] When disassembling, pull out the clamping rod 13, rotate the upper sample tray 4, and it can be contacted and fixed, and other upper sample trays 4 can be replaced. The disassembly and replacement are fast, which makes it convenient for users to disassemble the upper sample tray 4 to place sample bottles and needle washing bottles, and the upper sample tray 4 can be taken to other laboratories for placement, which is convenient and unrestricted to use.

[0037] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A gas chromatograph, comprising a gas chromatograph body, a control device arranged on the gas chromatograph body, and a liquid automatic sampling device arranged on the gas chromatograph body for reducing the mechanical labor of the staff, characterized in that: The liquid automatic sampling device includes: an automatic sampler arranged on the gas chromatograph body and electrically connected to the control device, a lower sampler tray rotatably arranged on the gas chromatograph body through a driving device for cooperating with the automatic sampler, an upper sampler tray is arranged on the lower sampler tray through a detachable device, and a plurality of needle washing bottle placement holes and injection bottle placement holes for placing needle washing bottles and injection bottles are respectively opened on the upper sampler tray.

2. A gas chromatograph according to claim 1, characterized in that: The detachable device includes: a rotating clamping device arranged between the upper sample tray and the lower sample tray to prevent the upper sample tray from being separated after being installed on the lower sample tray, and an elastic clamping device arranged on the lower sample tray to clamp the upper sample tray so that it cannot rotate.

3. A gas chromatograph according to claim 2, characterized in that: The rotating clamping device includes: a plurality of straight rods arranged on the lower sample tray and having a height higher than that of the upper sample tray, an arc block arranged on the top of the straight rods and having a bottom flush with the top of the upper sample tray, and an arc hole penetrating through the upper sample tray and matching the arc block.

4. A gas chromatograph according to claim 3, characterized in that: The elastic locking device includes: a fixed block arranged at the bottom of the lower sample tray, a sliding channel opened in the fixed block, a sliding hole penetrating the fixed block and the bottom of the lower sample tray, a clamping rod slidably arranged in the sliding hole, a limit block arranged on the clamping rod and located in the sliding channel, a spring sleeved on the clamping rod with one end resisting against the limit block and the other end resisting against the bottom of the sliding channel, and a clamping hole opened at the bottom of the upper sample tray for engaging with the clamping rod when the upper sample tray is rotated into place. The clamping rod is also provided with a handle for facilitating the pulling of the clamping rod.

5. A gas chromatograph according to claim 3, characterized in that: A guiding device is also provided between the upper sample feeding tray and the lower sample feeding tray so as not to confuse the placement direction when installing the upper sample feeding tray.

6. A gas chromatograph according to claim 5, characterized in that: The guide device comprises: a guide column arranged on the lower sample feeding plate, a guide block arranged on the guide column, a guide hole opened on the upper sample feeding plate, and a guide groove opened on the guide hole and having a size larger than the engaging block for the upper sample feeding plate to rotate.

7. A gas chromatograph according to claim 1, characterized in that: A handle is also provided on the side of the upper sample feeding tray to enable the user to take the upper sample feeding tray better.

8. A gas chromatograph according to claim 1, characterized in that: The driving device comprises: a servo motor which is arranged on the main body of the gas chromatograph and is electrically connected to the control device, and a rotating shaft of the servo motor is fixedly connected to a lower sample feeding plate.

9. A gas chromatograph according to claim 1, characterized in that: The control device comprises: a control panel arranged on the main body of the gas chromatograph.

10. A gas chromatograph according to claim 1, characterized in that: At least four feet are also arranged at the bottom of the gas chromatograph body for padding the gas chromatograph body to reduce the vibration noise of the gas chromatograph body.

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