Automatic gas chromatograph cleaning device
The design of an automated gas chromatograph cleaning device solves the problems of solvent overflow and residue during column cleaning, achieves stable clamping and thorough cleaning, and ensures the reliability of analysis results.
Patent Information
- Application Number
- CN202422313854.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In the prior art, the cleaning process of the chromatographic column has the problem of overflow and residue of the cleaning solvent, which affects the cleaning effect and the accuracy of the subsequent analysis results.
An automated gas chromatograph cleaning device was designed, including a cleaning component and a blowing component. Through an electric telescopic rod, a gear system, and gas control, it can firmly clamp the chromatographic column and effectively flush and purge the cleaning solvent to avoid solvent overflow and residue.
It effectively prevents solvent overflow caused by shaking of the chromatographic column during the cleaning process, ensures the cleaning effect, and completely removes residual solvent, ensuring the accuracy of subsequent analysis.
Smart Images
Figure CN223475720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas chromatography technology, and in particular to an automated gas chromatograph cleaning device. Background Technology
[0002] Gas chromatographs are widely used in many fields such as chemistry, pharmaceuticals, environmental monitoring, and food testing. With the increasing frequency of their use, the demand for efficient and accurate cleaning is becoming more and more prominent. In order to obtain more accurate and reliable analytical results, gas chromatographs need to maintain good working condition. The accumulation of contaminants can lead to problems such as baseline drift, peak shape distortion, and decreased separation effect, affecting the accuracy and repeatability of the analysis. The chromatographic column is an important component of the gas chromatograph, and its cleanliness affects the working condition of the gas chromatograph.
[0003] When cleaning a chromatographic column, the first step is to determine the level of contamination. This can be done by observing changes in peak shape and baseline stability. For mild contamination, the same mobile phase used when the column was first used can usually be used for rinsing. For moderate contamination, stronger solvents such as isopropanol or dichloromethane may be required, but attention must be paid to solvent compatibility to avoid damaging the column. Remove the column from the gas chromatograph, ensuring a tight seal to prevent leakage of the cleaning solvent. Control the flow rate of the cleaning solvent; a lower flow rate is generally preferable.
[0004] However, the column should not be shaken during cleaning to avoid spillage of the cleaning solvent. Leakage of the cleaning agent will result in insufficient dosage for cleaning the column, which will not be able to fully contact and remove contaminants, thus affecting the cleaning effect and preventing the column from restoring its good performance. In addition, if the cleaning solvent has poor volatility, some cleaning solvent residue will remain after the column is cleaned. If it is not cleaned in time, it will interfere with the subsequent analysis results. Therefore, an automated gas chromatograph cleaning device is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides an automated gas chromatograph cleaning device, which aims to improve the problems of cleaning solvent overflow caused by shaking during the column cleaning process and cleaning solvent residue after cleaning in the prior art.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: an automated gas chromatograph cleaning device, including a cleaning box. A support plate is fixedly connected to the middle of the left end of the cleaning box. A cleaning component is provided at the top of the support plate, and the end of the cleaning component is located at the top left side of the cleaning box. A second support plate is fixedly connected to the middle of the right end of the cleaning box. An air blowing component is provided at the top of the second support plate, and the end of the air blowing component is located at the top right side of the cleaning box. Electric telescopic rods are fixedly connected to both the left and right ends of the top of the cleaning box. The output ends of the two sets of front and rear electric telescopic rods are respectively connected to the cleaning... The washing assembly and the blowing assembly are fixed. A fixing plate is fixedly connected to the lower middle part of the interior of the washing chamber. Fixing blocks are fixedly connected to the top left and right sides of the fixing plate. Slots are opened in the middle of the two fixing blocks. The radius of the slots decreases from top to bottom. A water outlet pipe is fixedly connected to the bottom of the left fixing block at the top of the fixing plate. The water outlet pipe is inclined downward and extends to the outside of the left end of the washing chamber. Several air holes are opened at the bottom of the right fixing block at the right end of the fixing plate. The washing assembly is used to clean the chromatographic column, and the blowing assembly is used to dry the cleaning solvent remaining in the chromatographic column after cleaning.
[0007] As a further description of the above technical solution: the cleaning assembly includes a cleaning agent tank, the bottom of which is fixedly connected to the top of a support plate, a display panel is fixedly connected to the rear left side of the cleaning agent tank, two control knobs are rotatably connected to the front left side of the cleaning agent tank, a water pump is fixedly connected to the top of the cleaning agent tank, and an infusion tube is fixedly connected to the output end of the water pump. A connecting block is provided at the top left side inside the cleaning tank, a contact groove is provided at the middle of the bottom of the connecting block, the infusion tube is fixedly connected to the middle of the connecting block, an internal gear ring is rotatably connected inside the connecting block, four gears are equidistantly meshed on the inner side of the internal gear ring, a fixed shaft is fixedly connected to the middle of each of the four gears, a connecting plate is fixedly connected to the bottom of the connecting block at one end of the fixed shaft, a contact shaft is fixedly connected to the outer end of the connecting plate, a motor is fixedly connected to the outer end of the infusion tube at the top of the connecting block, a rotating shaft is fixedly connected to the output end of the motor, and the bottom end of the rotating shaft is fixedly connected to the top of the adjacent fixed shaft.
[0008] As a further description of the above technical solution: the two control knobs are electrically connected to the display panel and the water pump, and the end of the infusion tube is at the same horizontal line as the top of the contact groove.
[0009] As a further description of the above technical solution: the output ends of the two electric telescopic rods on the left are fixedly connected to the top of the connecting block one, and the first end of the infusion tube is located inside the cleaning agent tank.
[0010] As a further description of the above technical solution: the blowing assembly includes a nitrogen cylinder, the bottom end of which is attached to the middle of the top of the support plate two. A gas supply pipe is fixedly connected to the top of the nitrogen cylinder, and a pressure reducing valve is fixedly connected to the outside of the gas supply pipe. A connecting block two is provided at the top right side of the inside of the cleaning box. A contact groove two is provided at the bottom of the connecting block two. The end of the gas supply pipe is fixedly connected to the connecting block two. Four extrusion grooves are provided at equal intervals on the outside of the contact groove two inside the connecting block two. A spring is fixedly connected to the farthest end of each of the four extrusion grooves, and an extrusion block is fixedly connected to the outer end of each spring.
[0011] As a further description of the above technical solution: the end of the gas pipeline and the top of the second contact groove are on the same horizontal line, and the output ends of the two electric telescopic rods on the right are fixedly connected to the top of the second connecting block.
[0012] As a further description of the above technical solution: the electric telescopic rod on the right side does not contact the gas pipeline.
[0013] As a further description of the above technical solution: a door is rotatably connected to the front left side of the cleaning box, and glass is fixedly connected to the middle of the door.
[0014] This utility model has the following beneficial effects:
[0015] 1. In this utility model, the bottom end of the chromatographic column is placed into the left fixing block, so that the bottom end of the chromatographic column contacts the inside of the slot. Then, the left electric telescopic rod is activated, so that the connecting block moves downward. When the top end of the chromatographic column contacts the top end of the contact slot, the motor is activated, so that the four contact shafts clamp the chromatographic column to prevent it from moving randomly. Then, the water pump is activated to extract the cleaning solvent inside the cleaning agent tank and spray it out through the infusion tube to rinse the inside of the chromatographic column. The rinsed liquid flows out of the cleaning tank through the water outlet pipe, thus avoiding the problem of poor cleaning effect caused by the chromatographic column moving randomly during the cleaning process.
[0016] 2. In this utility model, the bottom end of the chromatographic column is moved into the slot of the right-side fixing block, and then the right-side electric telescopic rod is activated to move the connecting block two down until the top end of the chromatographic column contacts the top end of the contact groove two. Then the pressure reducing valve is opened to allow the nitrogen in the nitrogen cylinder to purge the inside of the chromatographic column through the gas delivery pipe until there is no residual cleaning solvent inside the chromatographic column. Then the chromatographic column is removed to prevent residual cleaning solvent from affecting the subsequent analysis results. Attached Figure Description
[0017] Figure 1 This is a three-dimensional schematic diagram of the automated gas chromatograph cleaning device proposed in this utility model;
[0018] Figure 2This is a left view of the cleaning component of the automated gas chromatograph cleaning device proposed in this utility model;
[0019] Figure 3 This is a top cross-sectional top view of the connecting block of the automated gas chromatograph cleaning device proposed in this utility model;
[0020] Figure 4 This is a front cross-sectional view of the connecting block of the automated gas chromatograph cleaning device proposed in this utility model;
[0021] Figure 5 This is a right view of the drying assembly of the automated gas chromatograph cleaning device proposed in this utility model;
[0022] Figure 6 for Figure 5 Enlarged view of part A in the middle;
[0023] Figure 7 This is a front cross-sectional view (right front view) of the fixing plate of the automated gas chromatograph cleaning device proposed in this utility model.
[0024] Legend:
[0025] 1. Cleaning tank; 2. Tank door; 3. Glass; 4. Support plate one; 5. Cleaning agent tank; 6. Display panel; 7. Control knob; 8. Water pump; 9. Infusion tube; 10. Connecting block one; 11. Internal gear ring; 12. Gear; 13. Fixed shaft; 14. Connecting plate; 15. Contact shaft; 16. Motor; 17. Rotating shaft; 18. Contact groove one; 19. Support plate two; 20. Nitrogen cylinder; 21. Gas infusion tube; 22. Pressure reducing valve; 23. Connecting block two; 24. Contact groove two; 25. Extrusion groove; 26. Spring; 27. Extrusion block; 28. Fixed plate; 29. Fixed block; 30. Slot; 31. Water outlet pipe; 32. Air hole; 33. Electric telescopic rod. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Reference Figure 1 and Figure 7This utility model provides an embodiment of an automated gas chromatograph cleaning device, comprising a cleaning chamber 1. A support plate 4 is fixedly connected to the middle of the left end of the cleaning chamber 1. A cleaning component is provided at the top of the support plate 4, with its end located at the top left side of the cleaning chamber 1. A support plate 19 is fixedly connected to the middle of the right end of the cleaning chamber 1. An air blowing component is provided at the top of the support plate 19, with its end located at the top right side of the cleaning chamber 1. Electric telescopic rods 33 are fixedly connected to both the left and right ends of the top of the cleaning chamber 1. The output ends of the two sets of front and rear electric telescopic rods 33 are respectively connected to the cleaning component and the air blowing component. A fixing plate 28 is fixedly connected to the lower middle part of the interior of the cleaning box 1. Fixing blocks 29 are fixedly connected to the top left and right sides of the fixing plate 28. Slots 30 are opened in the middle of the two fixing blocks 29. The radius of the slots 30 decreases from top to bottom. A water outlet pipe 31 is fixedly connected to the bottom of the left fixing block 29 at the top of the fixing plate 28. The water outlet pipe 31 is inclined downward and extends to the outer left side of the cleaning box 1. Several air holes 32 are opened at the bottom of the right fixing block 29 at the right end of the fixing plate 28. The cleaning assembly is used to clean the chromatographic column, and the air blowing assembly is used to dry the cleaning solvent remaining in the chromatographic column after cleaning.
[0028] The cleaning components, along with the left-side fixing block 29 and slot 30, prevent the column from shaking during cleaning, thus preventing the cleaning solvent from overflowing and affecting the cleaning effect. The cleaned liquid flows out of the cleaning chamber 1 through the water outlet pipe 31. The air blowing components, along with the right-side fixing block 29 and slot 30, facilitate the drying of any residual cleaning solvent after column cleaning, preventing residual cleaning solvent from affecting subsequent analytical results.
[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4The cleaning assembly includes a cleaning agent tank 5, the bottom of which is fixedly connected to the top of a support plate 4. A display panel 6 is fixedly connected to the rear left side of the cleaning agent tank 5. Two control knobs 7 are rotatably connected to the front left side of the cleaning agent tank 5. A water pump 8 is fixedly connected to the top of the cleaning agent tank 5. A delivery pipe 9 is fixedly connected to the output end of the water pump 8. A connecting block 10 is located at the top left side inside the cleaning tank 1. A contact groove 18 is formed in the middle of the bottom end of the connecting block 10. The delivery pipe 9 is fixedly connected to the middle of the connecting block 10. An internal gear ring 11 is rotatably connected inside the connecting block 10. Four gears 12 are equidistantly meshed on the inner side of the internal gear ring 11. The middle of the four gears 12... Each component is fixedly connected to a fixed shaft 13. A connecting plate 14 is fixedly connected to the bottom of the connecting block 10 at one outer end of the fixed shaft 13. A contact shaft 15 is fixedly connected to the outer end of the connecting plate 14. A motor 16 is fixedly connected to the outer end of the infusion tube 9 at the top of the connecting block 10. A rotating shaft 17 is fixedly connected to the output end of the motor 16. The bottom end of the rotating shaft 17 is fixedly connected to the top end of the adjacent fixed shaft 13. Two control knobs 7 are electrically connected to the display panel 6 and the water pump 8. The end of the infusion tube 9 is at the same horizontal line as the top end of the contact groove 18. The output ends of the two electric telescopic rods 33 on the left side are fixedly connected to the top end of the connecting block 10. The beginning end of the infusion tube 9 is located inside the cleaning agent tank 5.
[0030] By rotating the control knob 7, the flow rate and other data of the liquid can be adjusted. This data is displayed on the display panel 6 and controls the suction of the water pump 8. By activating the left electric telescopic rod 33, the top of the contact groove 18 is brought into direct contact with the top of the chromatographic column. There is no gap between the contact groove 18 and the infusion tube 9. When the water pump 8 is activated, the cleaning solvent inside the cleaning agent tank 5 enters the chromatographic column to flush it. The cleaning solvent will not overflow from the top of the chromatographic column. By activating the motor 16, the rotating shaft 17 is rotated, which in turn rotates the fixed shaft 13 and gear 12 connected to it. This causes the internal gear ring 11 to move, which in turn drives the other three gears 12 and the fixed shaft 13 to rotate synchronously, fixing the chromatographic column and preventing it from moving randomly during flushing.
[0031] Reference Figure 1 , Figure 5 and Figure 6The blowing assembly includes a nitrogen cylinder 20. The bottom end of the nitrogen cylinder 20 is attached to the middle of the top end of the support plate 19. A gas supply pipe 21 is fixedly connected to the top end of the nitrogen cylinder 20. A pressure reducing valve 22 is fixedly connected to the outside of the gas supply pipe 21. A connecting block 23 is provided at the top right side inside the cleaning box 1. A contact groove 24 is provided at the bottom end of the connecting block 23. The end of the gas supply pipe 21 is fixedly connected to the connecting block 23. The connecting block 23 has equidistant grooves on the outside of the contact groove 24. Four squeezing grooves 25 are provided, and springs 26 are fixedly connected to the ends of the four squeezing grooves 25 that are far apart from each other. Squeezing blocks 27 are fixedly connected to the outer ends of the springs 26. The end of the air supply pipe 21 is on the same horizontal line as the top of the second contact groove 24. The output ends of the two electric telescopic rods 33 on the right side are fixedly connected to the top of the second connecting block 23. The electric telescopic rods 33 on the right side do not contact the air supply pipe 21. The front left side of the cleaning box 1 is rotatably connected to the box door 2. The middle of the box door 2 is fixedly connected to the glass 3.
[0032] When the top of the chromatographic column is at the same horizontal level as the top of the contact groove 24, the end of the gas supply pipe 21 is in direct contact with the chromatographic column. The pressure reducing valve 22 is opened, allowing the nitrogen gas inside the nitrogen cylinder 20 to enter the chromatographic column directly through the gas supply pipe 21 to flush the inside of the column. The nitrogen cylinder 20 reduces the high-pressure gas, such as the high-pressure nitrogen in the nitrogen cylinder, to the required lower pressure and maintains a relatively stable output pressure. This is very important for protecting the chromatographic column and ensuring pressure stability during the purging process.
[0033] Working principle: By placing the bottom end of the chromatographic column into the left fixing block 29, the bottom end of the chromatographic column contacts the inside of the slot 30. Then, the left electric telescopic rod 33 is activated, causing the connecting block 10 to move downwards. The movement stops when the top end of the chromatographic column contacts the top end of the contact groove 18. Then, the motor 16 is activated, causing one gear 12 and the internal gear ring 11 to drive the other three gears 12 to rotate synchronously. This ensures that the outer side of the contact shaft 15 is in contact with the outer side of the chromatographic column, thus clamping the column and preventing it from moving erratically. Then, the control knob 7 is rotated to adjust the flushing data, and the water pump 8 is activated to flush the cleaning agent tank 5. The cleaning solvent is extracted and sprayed out through the infusion tube 9 to rinse the inside of the chromatographic column. The rinsed liquid flows out of the cleaning tank 1 through the water outlet tube 31. After cleaning, the bottom of the chromatographic column is moved into the slot 30 of the right-side fixing block 29. Then, the right-side electric telescopic rod 33 is activated to move the connecting block 23 down until the top of the chromatographic column contacts the top of the contact groove 24. The outer wall of the squeezing block 27 is in contact with the outer wall of the chromatographic column. Then, the pressure reducing valve 22 is opened to allow the nitrogen in the nitrogen cylinder 20 to purge the inside of the chromatographic column through the gas infusion tube 21 until there is no residual cleaning solvent inside the chromatographic column. The chromatographic column is then removed.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automated gas chromatograph cleaning device, comprising a cleaning chamber (1), characterized in that: A support plate 1 (4) is fixedly connected to the middle of the left end of the cleaning box (1). A cleaning component is provided at the top of the support plate 1 (4). The end of the cleaning component is located at the top left side of the cleaning box (1). A support plate 2 (19) is fixedly connected to the middle of the right end of the cleaning box (1). An air blowing component is provided at the top of the support plate 2 (19). The end of the air blowing component is located at the top right side of the cleaning box (1). Electric telescopic rods (33) are fixedly connected to both the left and right ends of the top of the cleaning box (1). The output ends of the two sets of front and rear electric telescopic rods (33) are fixed to the cleaning component and the air blowing component, respectively. A fixed component is fixedly connected to the lower middle part of the interior of the cleaning box (1). The plate (28) has fixed blocks (29) fixedly connected to the top left and right sides of the plate (28). The middle of the two fixed blocks (29) is provided with slots (30). The radius of the slots (30) decreases from top to bottom. The top of the plate (28) is fixedly connected to the bottom of the left fixed block (29) with a water outlet pipe (31). The water outlet pipe (31) is inclined downward and extends to the left side of the cleaning box (1). The right end of the plate (28) is provided with several air holes (32) at the bottom of the right fixed block (29). The cleaning assembly is used to clean the chromatographic column. The blowing assembly is used to blow dry the cleaning solvent remaining in the chromatographic column after cleaning.
2. The automated gas chromatograph cleaning device according to claim 1, characterized in that: The cleaning assembly includes a cleaning agent tank (5), the bottom of which is fixedly connected to the top of a support plate (4). A display panel (6) is fixedly connected to the rear left side of the cleaning agent tank (5). Two control knobs (7) are rotatably connected to the front left side of the cleaning agent tank (5). A water pump (8) is fixedly connected to the top of the cleaning agent tank (5). An infusion tube (9) is fixedly connected to the output end of the water pump (8). A connecting block (10) is provided at the top left side inside the cleaning tank (1). A contact groove (18) is provided in the middle of the bottom of the connecting block (10). The infusion tube (9) is fixedly connected to the middle of the connecting block (10). (10) is internally rotatably connected to an internal gear ring (11). The inner side of the internal gear ring (11) is equidistantly connected to four gears (12). The middle of each of the four gears (12) is fixedly connected to a fixed shaft (13). One end of the fixed shaft (13) is fixedly connected to a connecting plate (14) at the bottom of the connecting block (10). The outer end of the connecting plate (14) is fixedly connected to a contact shaft (15). The top end of the connecting block (10) is fixedly connected to a motor (16) at the outer end of the infusion tube (9). The output end of the motor (16) is fixedly connected to a rotating shaft (17). The bottom end of the rotating shaft (17) is fixedly connected to the top end of the adjacent fixed shaft (13).
3. The automated gas chromatograph cleaning device according to claim 2, characterized in that: The two control knobs (7) are electrically connected to the display panel (6) and the water pump (8), and the end of the infusion tube (9) is at the same horizontal line as the top of the contact groove (18).
4. The automated gas chromatograph cleaning device according to claim 2, characterized in that: The output ends of the two electric telescopic rods (33) on the left are fixedly connected to the top of the connecting block (10), and the first end of the infusion tube (9) is located inside the cleaning agent tank (5).
5. The automated gas chromatograph cleaning device according to claim 1, characterized in that: The blowing assembly includes a nitrogen cylinder (20), the bottom of which is attached to the middle of the top of the support plate (19). A gas supply pipe (21) is fixedly connected to the top of the nitrogen cylinder (20), and a pressure reducing valve (22) is fixedly connected to the outside of the gas supply pipe (21). A connecting block (23) is provided at the top right side of the inside of the cleaning box (1). A contact groove (24) is provided at the bottom of the connecting block (23). The end of the gas supply pipe (21) is fixedly connected to the connecting block (23). Four extrusion grooves (25) are provided at equal intervals on the outside of the contact groove (24) inside the connecting block (23). A spring (26) is fixedly connected to the far end of each of the four extrusion grooves (25), and an extrusion block (27) is fixedly connected to the outer end of each spring (26).
6. The automated gas chromatograph cleaning device according to claim 5, characterized in that: The end of the gas pipe (21) and the top of the contact groove (24) are on the same horizontal line, and the output ends of the two electric telescopic rods (33) on the right are fixedly connected to the top of the connecting block (23).
7. The automated gas chromatograph cleaning device according to claim 5, characterized in that: The electric telescopic rod (33) on the right side does not contact the gas pipe (21).
8. The automated gas chromatograph cleaning device according to claim 1, characterized in that: The front left side of the cleaning box (1) is rotatably connected to a box door (2), and the middle part of the box door (2) is fixedly connected to a glass (3).