Automatic sample injector with constant temperature function
By introducing a thermostatic component and a circulating fan into the autosampler, the problem of sample condensation and precipitation at low temperatures was solved, achieving constant temperature preservation and stable separation of samples, and avoiding column blockage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-03-10
AI Technical Summary
Existing autosamplers are prone to sample condensation and precipitation at low temperatures, leading to column blockage and lacking constant temperature preservation capabilities.
An automated sampler was designed, comprising a housing, a sample placement tray, a robotic arm, a control board, and a temperature control component. Through the cooperation of a first fluid pipe, a second fluid pipe, and a temperature control circulation device, the sample is kept at a constant temperature. Combined with a circulating fan and an insulation layer, temperature uniformity is ensured.
It effectively prevents sample condensation and precipitation, ensures that the sample remains at a constant temperature in the autosampler, avoids column blockage, and achieves stable sample separation and analysis.
Smart Images
Figure CN223986085U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an automatic sampler with constant temperature function. BACKGROUND
[0002] Liquid chromatograph is the instrument that utilizes the difference of distribution coefficient between flowing phase and fixed phase of different compounds, and carries out first separation, then analysis and identification to compound. The market liquid chromatograph has less control research to sample environment before separation front end, especially in automatic sampling part. Most automatic samplers do not specially involve sample storage environment, and thus have some deficiencies in the detection demand of sample with special requirements. And it is found in detection practice that when the environmental temperature is low, the sample to be detected in the automatic sampler will appear condensation and separation phenomenon, which will cause the chromatographic column to be blocked, and thus an automatic sampler with constant temperature function is urgently needed to solve the above problems. SUMMARY
[0003] This section is intended to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0004] The technical problem to be solved by the utility model is how to make the automatic sampler meet the demand of constant temperature storage of sample.
[0005] To solve the above technical problem, the utility model provides the following technical scheme: an automatic sampler with constant temperature function, comprising a box body, a box door, a sample placing disc, a sample feeding component, a mechanical arm, a control panel and a constant temperature assembly, the box door is arranged on the box body, the sample placing disc is arranged in the cavity at the front part of the box body, the sample feeding component is arranged at the right side of the sample placing disc, the mechanical arm is arranged at the back side of the cavity at the front part of the box body and is used for clamping the sample, the control panel is arranged in the cavity at the rear part of the box body, and the constant temperature assembly is arranged in the inner wall of the box body and is used for constant temperature storage of the sample.
[0006] The constant temperature assembly comprises a first fluid pipe, a second fluid pipe and a constant temperature circulating device, the first fluid pipe is arranged in the left inner wall of the front part of the box body in S shape, the second fluid pipe is arranged at the bottom of the sample placing disc in S shape, the second fluid pipe is communicated with the first fluid pipe, and the constant temperature circulating device is communicated with the first fluid pipe and is used for conveying constant temperature fluid.
[0007] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, a circulating fan is provided in the front cavity of the chamber to make the temperature in the front cavity of the chamber more uniform.
[0008] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, an insulation layer is provided in the inner wall of the chamber and the inner wall of the door. The insulation layer is made of polyurethane foam, which provides a certain insulation effect for the cavity at the front of the chamber.
[0009] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, a metal heat-conducting plate is provided on both the first fluid pipe and the second fluid pipe, and a thermally conductive potting compound is provided between the metal heat-conducting plate and the first fluid pipe and the second fluid pipe, so that the heat emitted by the first fluid pipe and the second fluid pipe can be fully transferred to the cavity at the front of the box through the metal heat-conducting plate.
[0010] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, a temperature sensor is provided on the metal heat-conducting plate to facilitate monitoring the temperature of the metal heat-conducting plate.
[0011] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, a through hole is provided on the left side wall of the housing, the inlet pipe and outlet pipe of the first fluid pipeline pass through the through hole, and quick-release connectors are provided on both the inlet pipe and outlet pipe of the first fluid pipeline. The first fluid pipeline is connected to the constant temperature circulation device through the quick-release connectors to realize a quick connection between the fluid pipeline and the constant temperature circulation device.
[0012] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, a connection port is provided on the upper rear side of the front cavity of the housing, a telescopic belt is provided in the connection port, and a hole for cooperating with the robotic arm is opened on the telescopic belt. The robotic arm passes through the telescopic belt to prevent the internal and external gases of the front cavity of the housing from flowing back and forth during the movement of the robotic arm.
[0013] As a preferred embodiment of the automatic sampler with constant temperature function described in this utility model, an air pipe is connected to the quick-release connector to facilitate the purging of fluid in the fluid pipe.
[0014] Beneficial effects: By cooperating with the first fluid pipeline, the second fluid pipeline and the constant temperature circulation equipment, the sample in the autosampler can be kept at a constant temperature. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0016] Figure 1 This is a schematic diagram of the casing and door of an autosampler with a constant temperature function.
[0017] Figure 2 This is a schematic diagram of the internal structure of an autosampler with a constant temperature function.
[0018] Figure 3 This is a schematic diagram showing the positional structure between the first fluid conduit, the metal heat-conducting plate, the thermally conductive potting compound, and the insulation layer of an autosampler with a constant temperature function.
[0019] Figure 4 This is a schematic diagram showing the positional structure between the second fluid conduit, the metal heat-conducting plate, the thermally conductive potting compound, and the insulation layer of an autosampler with a constant temperature function.
[0020] Figure 5 This is a schematic diagram showing the location and structure of the quick-release connector of an autosampler with a constant temperature function.
[0021] Figure 6 This is a schematic diagram of the connection structure between the first and second fluid lines of an autosampler with a constant temperature function.
[0022] Figure 7 This is a schematic diagram showing the position and structure of the telescopic belt of an autosampler with a constant temperature function.
[0023] Figure 8 This is a schematic diagram of the connection structure of the thermostatic circulation equipment, air duct, and quick-release connector for an autosampler with thermostatic function.
[0024] In the diagram: 1. Chamber; 2. Chamber door; 3. Sample placement tray; 4. Sample injection component; 5. Robotic arm; 6. Control panel; 7. Thermostatic component; 71. First fluid pipeline; 72. Second fluid pipeline; 73. Thermostatic circulation equipment; 8. Circulating fan; 9. Insulation layer; 10. Metal heat-conducting plate; 11. Thermally conductive potting compound; 12. Temperature sensor; 13. Through hole; 14. Quick-release connector; 15. Connection port; 16. Telescopic belt; 17. Hole; 18. Air duct; 19. Control valve; 20. Check valve. Detailed Implementation
[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0028] Example
[0029] Reference Figures 1-8 This embodiment provides an automatic sampler with a constant temperature function, including a housing 1, a door 2, a sample placement tray 3, a sample injection component 4, a robotic arm 5, a control board 6, and a constant temperature component 7. The door 2 is disposed on the housing 1, the sample placement tray 3 is disposed in the cavity at the front of the housing 1, the sample injection component 4 is disposed on the right side of the sample placement tray 3, the robotic arm 5 is disposed on the rear side of the cavity at the front of the housing 1 for gripping the sample, the control board 6 is disposed in the cavity at the rear of the housing 1, and the constant temperature component 7 is disposed in the inner wall of the housing 1 for constant temperature preservation of the sample.
[0030] The constant temperature component 7 includes a first fluid pipe 71, a second fluid pipe 72, and a constant temperature circulation device 73. The first fluid pipe 71 is arranged in an S-shape in the inner left side of the front of the box 1. The second fluid pipe 72 is arranged in an S-shape at the bottom of the sample placement tray 3. The second fluid pipe 72 is connected to the first fluid pipe 71. The constant temperature circulation device 73 is connected to the first fluid pipe 71 and is used to transport constant temperature fluid.
[0031] The housing 1 has a rectangular structure and serves as the mounting base for the autosampler. A door 2 is installed on the housing 1. The interior of the housing 1 is divided into two cavities, front and rear. A sample placement tray 3 is installed on the left side of the front cavity of the housing 1 for placing samples. An injection component 4 is installed on the right side of the sample placement tray 3 (the right side of the front cavity of the housing 1). A robotic arm 5 is installed on the rear side of the front cavity of the housing 1, which can automatically pick up samples. The robotic arm 5 and the injection component 4 work together to realize the automatic injection of samples by the autosampler. A control board 6 is installed in the rear cavity of the housing 1 to control the operation of the entire autosampler. A temperature control component 7 is installed in the inner wall of the housing 1 to achieve constant temperature preservation of samples.
[0032] Specifically, the constant temperature assembly 7 mainly consists of a first fluid pipe 71, a second fluid pipe 72, and a constant temperature circulation device 73. The first fluid pipe 71 is arranged in an S-shape in the inner wall of the left side of the front part of the chamber 1 to facilitate constant temperature control of the cavity in front of the chamber 1. The S-shaped arrangement of the first fluid pipe 71 further increases the area of heat radiation to the cavity in front of the chamber 1, making the temperature in the cavity more uniform and reducing temperature differences. The second fluid pipe 72 is arranged in an S-shape at the bottom of the sample placement tray 3 (in the inner wall of the bottom of the front side of the chamber 1) to achieve heat transfer to the sample placement tray 3, ensuring that the sample on the sample placement tray 3 is in a constant temperature preservation environment. This prevents condensation and precipitation of the sample due to low storage temperature, thus preventing column blockage. The S-shaped arrangement of the second fluid pipe 72 further... The increased heat radiation area of the sample placement tray 3 makes the temperature on the sample placement tray 3 more uniform. The second fluid pipe 72 and the first fluid pipe 71 are interconnected so that the fluid in the second fluid pipe 72 can enter the first fluid pipe 71. The first fluid pipe 71 and the second fluid pipe 72 are integrated. The inlet and outlet pipes of the first fluid pipe 71 are connected to the constant temperature circulation device 73. The constant temperature circulation device 73 provides the fluid pipe with a constant temperature fluid and can adjust the specific temperature of the fluid. The constant temperature fluid is transported to the first fluid pipe 71 through the inlet pipe. After the fluid completes one cycle in the fluid pipe, it flows out from the outlet pipe of the first fluid pipe 71 and re-enters the constant temperature circulation device 73 for heating, thereby ensuring that the fluid in the fluid pipe is always in a constant temperature state.
[0033] Furthermore, a circulating fan 8 is installed in the front cavity of the housing 1.
[0034] In this embodiment, a circulating fan 8 is embedded in the front cavity of the chamber 1. The circulating fan makes the hot air in the front cavity of the chamber 1 circulate in the cavity, so that the temperature in the front cavity of the chamber 1 is more uniform, thereby better keeping the sample in a constant temperature storage environment.
[0035] Furthermore, an insulation layer 9 is provided in the inner wall of the box 1 and the inner wall of the door 2. The insulation layer 9 is made of polyurethane foam.
[0036] In this embodiment, polyurethane foam is filled into the inner walls of the left, right, top, bottom and rear sides of the front cavity of the box 1 and the inner wall of the door 2 as a heat insulation layer 9 to provide a certain heat insulation effect for the front cavity of the box 1, prevent heat loss from the front cavity of the box 1, and thus keep the sample in a constant temperature storage environment.
[0037] Furthermore, a metal heat-conducting plate 10 is provided on both the first fluid pipe 71 and the second fluid pipe 72, and a thermally conductive potting compound 11 is provided between the metal heat-conducting plate 10 and the first fluid pipe 71 and the second fluid pipe 72.
[0038] In this embodiment, metal heat-conducting plates 10 are installed on the upper surfaces of both the first fluid pipe 71 and the second fluid pipe 72. This allows the heat emitted by the first fluid pipe 71 and the second fluid pipe 72 to be quickly and fully transferred to the cavity at the front of the housing 1 and the bottom of the sample placement tray 3 through the metal heat-conducting plates 10. Furthermore, the metal heat-conducting plates 10 are bonded to the first fluid pipe 71 and the second fluid pipe 72 using thermally conductive potting compound 11. This avoids direct contact between the metal heat-conducting plates 10 and the first fluid pipe 71 and the second fluid pipe 72, providing a certain degree of insulation. The thermally conductive potting compound 11 also has good thermal conductivity, minimizing heat loss as much as possible.
[0039] Furthermore, a temperature sensor 12 is provided on the metal heat-conducting plate 10.
[0040] In this embodiment, a temperature sensor 12 is installed on the metal heat-conducting plate 10 to monitor the temperature of the metal heat-conducting plate 10, so as to adjust the temperature of the fluid according to the measurement results of the temperature sensor 12.
[0041] Furthermore, a through hole 13 is provided on the left side wall of the housing 1. The inlet pipe and outlet pipe of the first fluid pipe 71 pass through the through hole 13. A quick-release connector 14 is provided on both the inlet pipe and outlet pipe of the first fluid pipe 71. The first fluid pipe 71 is connected to the constant temperature circulation equipment 73 through the quick-release connector 14.
[0042] In this embodiment, a through hole 13 is provided on the left side wall of the housing 1. The inlet and outlet pipes of the first fluid pipe 71 pass through the through hole 13. The ends of the inlet and outlet pipes of the first fluid pipe 71 that extend outside the housing 1 are equipped with quick-release connectors 14. The inlet and outlet pipes of the first fluid pipe 71 can be directly connected to the constant temperature circulation device 73 through the quick-release connectors 14 to achieve a quick connection between the fluid pipe and the constant temperature circulation device 73.
[0043] Furthermore, a connection port 15 is provided on the upper rear side of the front cavity of the housing 1, and a telescopic belt 16 is provided inside the connection port 15. The telescopic belt 16 has a hole 17 that cooperates with the robotic arm 5, and the robotic arm 5 passes through the telescopic belt 16.
[0044] In this embodiment, a connection port 15 is provided on the upper rear side of the front cavity of the housing 1. A telescopic belt 16 is installed in the connection port 15. The telescopic belt 16 has a certain elasticity. A hole 17 is provided on the telescopic belt 16 to cooperate with the robotic arm 5. During installation, the robotic arm 5 passes through the hole 17 and through the telescopic belt 16 to prevent the internal and external gas from flowing back and forth in the front cavity of the housing 1 during the left and right movement of the robotic arm 5.
[0045] Furthermore, an air duct 18 is connected to the quick-release connector 14.
[0046] In this embodiment, a T-connector is installed on the quick-release connector 14. The upper end of the T-connector is connected to an air pipe 18, and the right end of the T-connector is connected to a constant temperature circulation device 73. This allows the quick-release connector 14 to be connected to both the air pipe 18 and the constant temperature circulation device 73 simultaneously. The connection is controlled by a control valve 19. When the autosampler does not require constant temperature control, external air can be blown into the fluid pipe through the quick-release connector 14 via the air pipe 18 to purge the fluid in the fluid pipe, facilitating the disassembly of the constant temperature circulation device 73. A control valve 19 is also installed on the air pipe 18 to better control the air in the pipe. To prevent backflow of air in the pipe, a check valve 20 is also installed on the air pipe 18 in this embodiment.
[0047] In use, first quickly connect the constant temperature circulation device 73 to the quick-release connector 14 on the first fluid pipe 71. After that, place the sample on the sample placement tray 3 and close the chamber door 2. Then start the constant temperature circulation device 73 to deliver a constant temperature fluid to the first fluid pipe 71 through the inlet pipe. The fluid then flows from the first fluid pipe 71 to the second fluid pipe 72, and then returns to the first fluid pipe 71 through the second fluid pipe 72. The fluid then flows out through the outlet pipe of the first fluid pipe 71 and re-enters the constant temperature circulation device 73. After being heated to a constant temperature, the fluid flows out again and enters the first fluid pipe 71, repeating the cycle. During this process, as the constant temperature fluid flows through the first fluid pipe 71, the heat of the constant temperature fluid is transferred to the metal heat-conducting plate 10 through the thermally conductive potting compound 11, and then radiated from the metal heat-conducting plate 10 to the cavity at the front of the chamber 1. This ensures that the sample inside the cavity is kept in a constant temperature environment. At the same time, the circulating fan 8 is activated to circulate the hot air in the front cavity of the chamber 1, making the temperature in the front cavity of the chamber 1 more uniform. When the constant temperature fluid flows through the second fluid pipe 72, the heat of the constant temperature fluid is transferred to the metal heat-conducting plate 10 through the thermally conductive potting compound 11, and then radiated by the metal heat-conducting plate 10 to the bottom of the sample placement tray 3, further transferring heat to the sample on the sample placement tray 3, thereby ensuring that the sample is kept in a constant temperature environment. At the same time, the temperature of the constant temperature fluid in the constant temperature circulation device 73 can be adjusted by the monitoring data of the temperature sensor 12 on the metal heat-conducting plate 10 until the automatic sample injection is completed. When the automatic sampler does not need to control the constant temperature, the fluid in the fluid pipe can be purged by the air in the air pipe 18 to facilitate the disassembly of the constant temperature circulation device 73.
[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An autosampler with constant temperature function, characterized in that: The utility model relates to a kind of sample storage box, including box (1), box door (2), sample placement tray (3), sample feeding component (4), mechanical arm (5), control panel (6), constant temperature component (7), the box door (2) is set on the box (1), the sample placement tray (3) is set in the cavity of the front of the box (1), the sample feeding component (4) is set in the right side of the sample placement tray (3), the mechanical arm (5) is set in the rear side of the cavity of the front of the box (1), for clamping sample, the control panel (6) is set in the cavity of the rear of the box (1), the constant temperature component (7) is set in the inner wall of the box (1), for constant temperature storage of sample; The constant temperature component (7) includes first fluid duct (71), second fluid duct (72) and constant temperature circulation equipment (73), the first fluid duct (71) is arranged in the left inner wall of the front of the box (1) in S type, the second fluid duct (72) is arranged in the bottom of the sample placement tray (3) in S type, the second fluid duct (72) is communicated with the first fluid duct (71), the constant temperature circulation equipment (73) is communicated with the first fluid duct (71), for conveying constant temperature fluid.
2. The auto-sampler with constant temperature function according to claim 1, characterized in that: Circulating fan (8) is arranged in the front cavity of the box (1).
3. The auto-sampler with constant temperature function according to claim 2, characterized in that: Thermal insulation layer (9) is arranged in the inner side wall of the box (1) and the inner wall of box door (2), and the material of the thermal insulation layer (9) is polyurethane foam.
4. The auto-sampler with constant temperature function according to claim 3, characterized in that: Metal heat-conducting plate (10) is arranged on the first fluid duct (71) and the second fluid duct (72), and heat-conducting filling adhesive (11) is arranged between the metal heat-conducting plate (10) and the first fluid duct (71) and the second fluid duct (72).
5. The auto-sampler with constant temperature function according to claim 4, characterized in that: Temperature sensor (12) is arranged on the metal heat-conducting plate (10).
6. The auto-sampler with constant temperature function according to claim 1, characterized in that: Through hole (13) is formed in the left side wall of the box (1), the inlet pipe and the outlet pipe of the first fluid duct (71) penetrate through the through hole (13), quick-release connector (14) is arranged on the inlet pipe and the outlet pipe of the first fluid duct (71), and the first fluid duct (71) is communicated with the constant temperature circulation equipment (73) through the quick-release connector (14).
7. The auto-sampler with constant temperature function according to claim 1, characterized in that: Connecting port (15) is arranged above the rear side of the front cavity of the box (1), telescopic belt (16) is arranged in the connecting port (15), hole (17) matched with the mechanical arm (5) is formed in the telescopic belt (16), and the mechanical arm (5) penetrates through the telescopic belt (16).
8. The auto-sampler with constant temperature function according to claim 6, characterized in that: Air duct (18) is connected to the quick-release connector (14).