Multi-station sample injection device and sample detection system

Abstract

The application discloses a kind of multi-station sample introduction device and sample detection system, belong to environmental monitoring automated laboratory field.Device includes: N sample introduction stations;N transfer components;N shaking components;Wherein, device is configured so that the transfer operation, shaking operation on N sample introduction stations and the analysis operation of sample in sample container in analytical instrument can overlap on the timing of single analytical instrument.This application is independently configured transfer component and shaking component for each sample introduction station, breaks the serial timing dependence of shaking operation and analysis operation, so that shaking operation no longer occupies the processing time window of analytical instrument, realizes the overlapping of transfer, shaking and analysis in timing, greatly shortens the equivalent processing period of single sample, greatly improves the overall turnover efficiency of sample container on assembly line, and adapts to continuous, uninterrupted sample inflow scene, can satisfy the demand of high-throughput, high-efficiency environmental monitoring.

Description

Technical Field

[0001] This invention relates to the field of analytical testing technology, and in particular, to a multi-station sample introduction device. Furthermore, this invention also relates to a sample testing system including the aforementioned multi-station sample introduction device. Background Technology

[0002] In automated laboratories used in chemical analysis, biological detection, and environmental monitoring, samples are typically contained in standard sample vials and flow through an automated production line, undergoing multiple processing steps including sample injection, mixing, sampling, and analysis. Sample injection (transferring the sample vial from the production line to the processing station) and mixing (vibrating and mixing the sample within the vial) are two fundamental and crucial operations. Achieving efficient coordination between sample injection and mixing, and reducing the waiting time for samples during transit, is key to improving detection efficiency.

[0003] To address the aforementioned issues, the prior art discloses the following automated equipment that integrates sample introduction and mixing functions: 1) Module Separation Scheme: For example, Chinese invention patent application CN108802413A discloses an in vitro quantitative detection instrument, which includes a sample injection device, a shaking and opening device, a reagent kit delivery device, an incubation and detection component, and a robotic arm. The shaking and opening device is located close to the sample injection device and is used to open, shake, and close the sample tubes delivered by the sample injection device. In this scheme, the injection device and the shaking and opening device are separated, and the sample needs to be transferred between the injection device and the shaking and opening device through a transfer mechanism. This not only causes time loss in spatial transfer but also means that the shaking operation must wait until the sample injection is completed, and the analysis operation must wait until the shaking is completed, forming a strict sequential time dependency.

[0004] 2) Functional Integration but Shared Mechanism Solution: For example, the multifunctional autosampler for spectrometers disclosed in Chinese Utility Model Patent CN220961552U includes a housing and the following components installed within the housing: a liquid addition system for adding reagents to test tubes; a volume control system for controlling the amount of reagent added to the test tubes; a mixing system for moving the test tubes to mix the reagents; a liquid extraction and injection system for injecting the mixed reagents from the test tubes into the detection system; an ultrasonic water bath digestion and temperature control system for digesting the reagents in the test tubes; and an exhaust system for cooling the reagents in the test tubes. This solution integrates the sample injection and mixing functions into the same device, but the mixing system is a single unit used to sequentially move multiple test tubes to achieve reagent mixing. Multiple samples must queue and wait for the same mixing mechanism. During continuous sample injection, the mixing step easily becomes a bottleneck, significantly increasing the proportion of waiting time for mixing in the processing cycle of a single sample.

[0005] 3) A continuous solution for sample injection and shaking: For example, Chinese invention patent application CN117309547A discloses a shaking device, which includes a base, a driving component, a driving wheel assembly, a driven wheel assembly, and a clamping component; wherein, the driving component is disposed on the base, and the clamping component is used to clamp the sample container; the driving wheel assembly includes a first turntable and a swing arm, the first turntable is connected to the driving component, one end of the swing arm is rotatably connected to the first turntable, and the other end of the swing arm is rotatably connected to the clamping component; the driven wheel assembly includes a second turntable and a guide rail, the second turntable is movably disposed on the base, the guide rail is disposed on the second turntable, and the clamping component is engaged with and slidably fitted to the guide rail. During operation, this shaking device is powered by a drive unit to rotate the first turntable, causing a lever to slide the clamping component along a guide rail. When the clamping component slides to one end of the guide rail, a sample container can be inserted into it. The drive unit then rotates the first turntable in the opposite direction, moving the clamping component to the other end of the guide rail. The clamping component and the guide rail work together to rotate the second turntable. The synchronous rotation of the first and second turntables ensures that the sample in the container held by the clamping component is shaken, ensuring a smoother transition between sample injection and shaking operations, maximizing shaking efficiency and avoiding limitations on the analyzer's efficiency. However, this shaking device uses a single-station processing method. Since the analyzer requires time to analyze the sample, and the shaking process before analysis also requires time, the shaking and analysis operations cannot overlap in time. As the number of samples increases, the total processing time accumulates linearly, leading to low overall line efficiency.

[0006] In summary, although existing solutions have improved the automation of sample introduction and mixing, they all share the common feature of using a single mixing mechanism to serve multiple samples. The difference lies only in whether the single mixing mechanism is separate from the sample introduction module and integrated into the device, or whether it is used for batch processing. The processing is essentially serial or time-sharing, with the analysis time and mixing time of a single sample overlapping in time. This means that the mixing operation must wait for the analyzer to be idle, or the analysis operation must wait for the mixing to complete, forming a strict serial time dependency. This results in low sample throughput efficiency on the pipeline, making it difficult to meet the ever-increasing demands for high-throughput and high-efficiency environmental monitoring. Summary of the Invention

[0007] This invention provides a multi-station sample introduction device and sample detection system to solve the technical problems of existing sample introduction devices using a single shaking mechanism to serve multiple samples, resulting in a sequential dependency between shaking and analysis operations, long sample processing cycles, and low sample turnover efficiency on the production line.

[0008] According to one aspect of the present invention, a multi-station sample introduction device is provided, comprising: N sample introduction stations arranged at intervals along a production line, where N is an integer greater than 1; N transfer components, each corresponding to one of the N sample introduction stations, each transfer component being used to transfer a sample container from the production line to the corresponding sample introduction station; and N shaking components, each corresponding to one of the N sample introduction stations, each shaking component being used to shake the sample container located at the corresponding sample introduction station; wherein the multi-station sample introduction device is configured such that the transfer operations, shaking operations, and analysis operations of the sample in the sample container in the analytical instrument at the N sample introduction stations can overlap in the timing sequence of a single analytical instrument.

[0009] As a further improvement to the above technical solution: Furthermore, the shaking assembly includes a shaking drive, a shaking clamp, and a shaking transmission component. The shaking clamp is located at the sample injection station and is used to clamp the sample container. The shaking transmission component is connected between the shaking drive and the shaking clamp and is used to transmit the power of the shaking drive to the shaking clamp to drive the shaking clamp and the sample container it clamps to perform shaking motion.

[0010] Furthermore, the shaking clamping component includes: a shaking base plate, rotatably mounted at the sample injection station and connected to the shaking transmission component, used to carry the sample container and drive it to perform shaking motion; multiple clamping vertical plates, at least two clamping vertical plates are respectively arranged on opposite sides of the shaking base plate, used to form a clamping space on the side of the sample container; at least two contouring attitude adjustment springs, each clamping vertical plate is provided with at least one contouring attitude adjustment spring, the contouring attitude adjustment spring has a contoured curved surface for adapting to the outer wall of the sample container, the contouring attitude adjustment spring is used to provide elastic clamping force to the sample container located in the clamping space, and guides the sample container to adjust its posture during the clamping process through the contoured curved surface.

[0011] Furthermore, the shaking assembly also includes a shaking sensor, which is set at the sample injection station and located at the preset stop position of the movement trajectory of the shaking base plate. The shaking sensor is used to detect whether the shaking clamp has moved to the preset stop position after the shaking operation is completed, and to issue a stop signal when the shaking clamp is detected to have moved to the preset stop position, so that the shaking clamp stops precisely at the preset stop position.

[0012] Furthermore, the multi-station injection device also includes a sampling assembly, which includes a sampling needle for inserting into the sample container, a sampling drive mechanism connected to the sampling needle for driving the sampling needle to rotate circumferentially around a vertical axis and to move vertically, and a sampling pump connected to the sampling needle for extracting the sample from the sample container through the sampling needle. The N injection stations are located below the motion trajectory formed by the circumferential rotation of the sampling needle.

[0013] Furthermore, the sampling drive mechanism includes a sampling arm connected to the sampling needle, a rotary drive connected to the sampling arm for driving the sampling arm to rotate circumferentially around a vertical axis, and a lifting drive connected to the sampling arm for driving the sampling arm to move vertically up and down. The rotary drive and the lifting drive are controlled independently so that the rotational and lifting movements of the sampling arm do not interfere with each other, thereby avoiding positioning errors caused by linkage drive and improving the positioning accuracy of the sampling needle at the sample injection station.

[0014] Furthermore, the sampling needle includes a puncture needle tip and a sample delivery needle tube. The puncture needle tip is a solid pointed cone shape, and the sample delivery needle tube is connected to the puncture needle tip. The sample delivery needle tube has a hollow sample channel, and a hollow structure is provided at the connection between the puncture needle tip and the sample delivery needle tube. The hollow structure is connected to the sample channel so that the sampling needle can guide the sample into the sample channel through the hollow structure while maintaining its puncture capability.

[0015] Furthermore, the multi-station sampling device also includes a cleaning assembly, which includes a cleaning tank, a cleaning multi-way valve, a drain pipe, and a liquid pump. The cleaning tank is used to contain cleaning media and waste liquid. The cleaning multi-way valve is connected to the cleaning tank, the drain pipe, and the liquid pump respectively, for connecting the cleaning tank and the drain pipe so that the waste liquid in the cleaning tank can be discharged through the drain pipe, or connecting the cleaning tank and the liquid pump so that the cleaning media can be delivered into the cleaning tank through the liquid pump. The cleaning tank is located below the motion trajectory formed by the circumferential rotation of the sampling needle.

[0016] Furthermore, the transfer assembly includes a push-pull linkage, a push-pull drive, and a push-pull section. The push-pull linkage is connected to the drive end of the push-pull drive and the push-pull section, respectively. The push-pull drive is used to drive the push-pull section to reciprocate horizontally via the push-pull linkage. The push-pull section has a U-shaped structure with its opening facing downwards. In the non-working state, it is used to fix and suspend above the sample container on the assembly line, forming a channel between itself and the bearing surface of the assembly line that allows the sample container to pass through unobstructed. When the push-pull section moves towards the sample injection station, it pulls the sample container located in the push-pull section back from the assembly line to the sample injection station. After the sample container has been tested, the push-pull section moves in the opposite direction, pushing the sample container from the sample injection station onto the assembly line. After the push-pull section has completed pushing and returned to its initial position, it is fixed and suspended above the assembly line again, allowing the sample container to pass through the channel unobstructed, achieving obstacle avoidance in a static geometric manner.

[0017] According to another aspect of the present invention, a sample testing system is also provided, which includes the multi-station sample introduction device described above.

[0018] The present invention has the following beneficial effects: The multi-station sample introduction device of this invention is configured with N sample introduction stations, N transfer components, and N mixing components in a one-to-one correspondence. This allows each sample introduction station to independently transfer sample containers from the production line and perform mixing operations on the sample containers via the corresponding transfer and mixing components. This breaks the sequential timing dependency between mixing and analysis operations, eliminating the need for mixing operations to occupy the processing time window of the analytical instrument or wait for the instrument to become idle. While the analytical instrument is sampling and analyzing a sample container at one sample introduction station, the transfer and mixing operations at other sample introduction stations can be performed simultaneously. This achieves overlapping of transfer, mixing, and analysis operations within a single analytical instrument, significantly shortening the equivalent processing cycle of a single sample and greatly improving the overall flow efficiency of sample containers on the production line. Through the sample introduction... The multi-station sample introduction unit is arranged at intervals along the production line. Sample containers are transferred from the production line to the injection station, shaken, and sampled before returning to the production line. The entire process is seamlessly and precisely coordinated with the production line. This architecture allows the multi-station sample introduction device to adapt to continuous and uninterrupted sample inflow scenarios, avoiding sample backlog caused by waiting for transfer and shaking, and meeting the needs of high-throughput environmental monitoring. In addition, since each shaking component can work independently and its shaking parameters can be set independently, it can meet the personalized requirements of different samples and different detection items for shaking parameters, making it highly applicable. This solution, by adopting a multi-station independent sample introduction and shaking architecture design, significantly shortens the processing cycle of batch samples compared to existing technologies, improves the flow efficiency of the production line, meets the needs of high-throughput and high-efficiency environmental monitoring, and is highly practical and suitable for widespread promotion and application.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a first-view perspective three-dimensional structural diagram of the multi-station sample introduction device according to a preferred embodiment of the present invention; Figure 2 This is a two-dimensional structural schematic diagram of the multi-station sample introduction device according to a preferred embodiment of the present invention from a second perspective. Figure 3 This is a three-dimensional schematic diagram of a portion of the structure of the multi-station sample introduction device according to a preferred embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of a portion of the structure of the multi-station sample introduction device according to a preferred embodiment of the present invention; Figure 5This is a partial structural schematic diagram of the sample introduction component in the multi-station sample introduction device of the preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the cleaning component in the multi-station sample introduction device of a preferred embodiment of the present invention.

[0021] Legend: 100. Sample introduction device; 200. Sample introduction station; 300. Transfer assembly; 310. Push-pull linkage; 320. Push-pull drive; 330. Push-pull section; 400. Shaking assembly; 410. Shaking drive; 420. Shaking transmission; 430. Shaking clamp; 431. Shaking base plate; 432. Clamping vertical plate; 433. Contouring adjustment spring; 500. Sampling assembly; 510. Sampling needle; 520. Sampling drive mechanism; 521. Sampling arm; 522. Rotation drive; 523. Lifting drive; 530. Sampling pump; 540. Sampling multi-way valve; 550. Air pump; 600. Cleaning assembly; 610. Cleaning tank; 620. Cleaning multi-way valve; 630. Drain pipe; 640. Liquid pump; 700. Sample container. Detailed Implementation

[0022] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification.

[0023] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not restrictive. For example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” as used herein may also include the plural forms. When used in this specification, the terms “comprising,” “including,” and / or “containing” mean that the associated integers, steps, operations, elements, and / or components are present, but do not preclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups, or that other features, integers, steps, operations, elements, components, and / or groups may be added to the system / method.

[0024] Considering the following description, these and other features of this specification, as well as the operation and function of the related components of the structure, and the economy of assembly and manufacture of the parts, can be significantly improved. All of these form part of this specification with reference to the accompanying drawings. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0025] The multi-station sample introduction device 100 of this embodiment includes: N sample introduction stations 200, arranged at intervals along the production line, where N is an integer greater than 1; N transfer components 300, each corresponding to one of the N sample introduction stations 200, each transfer component 300 being used to transfer a sample container 700 from the production line to the corresponding sample introduction station 200; and N shaking components 400, each corresponding to one of the N sample introduction stations 200, each shaking component 400 being used to shake the sample container 700 located at the corresponding sample introduction station 200. The multi-station sample introduction device 100 is configured such that the transfer operations and shaking operations at the N sample introduction stations 200, and the analysis operations of the sample in the sample container 700 in the analytical instrument, can overlap in the timing sequence of a single analytical instrument.

[0026] Specifically, the multi-station sampling device 100 of the present invention is configured with N sampling stations 200, N transfer components 300, and N mixing components 400 in a one-to-one correspondence. This allows each sampling station 200 to independently transfer a sample container 700 from the production line and perform a mixing operation on the sample container 700 via its corresponding transfer component 300 and mixing component 400. This breaks the sequential timing dependency between the mixing operation and the analysis operation, eliminating the need for the mixing operation to occupy the processing time window of the analytical instrument or wait for the instrument to become idle. While the analytical instrument is sampling and analyzing a sample container 700 in one sampling station 200, the transfer and mixing operations at other sampling stations 200 can be performed simultaneously. This achieves overlap between the transfer and mixing operations and the analysis of the sample in the sample container 700 within a single analytical instrument, significantly shortening the equivalent processing cycle of a single sample and greatly improving throughput. The overall flow efficiency of the sample container 700 on the waterline is high. Through the sample injection stations 200 arranged at intervals along the flowline, the sample container 700 is transferred from the flowline to the injection station 200, and after shaking and sampling, it can return to the flowline. The entire process is seamlessly and precisely coordinated with the flowline. This architecture allows the multi-station injection device 100 to adapt to continuous, uninterrupted sample inflow scenarios, avoiding sample backlog caused by waiting during transfer and shaking, and meeting the needs of high-throughput environmental monitoring. Furthermore, since each shaking component 400 can work independently, its shaking parameters can also be set independently, thus meeting the personalized requirements of different samples and different detection items for shaking parameters, making it highly applicable. This solution, by adopting a multi-station independent injection and shaking architecture design, significantly shortens the processing cycle of batch samples compared to existing technologies, improves the flow efficiency of the flowline, meets the needs of high-throughput and high-efficiency environmental monitoring, and is highly practical and suitable for widespread promotion and application.

[0027] In this embodiment, N is 2, and the multi-station injection device 100 includes two injection stations 200. The two injection stations 200 are the test station and the test station, respectively. The two injection stations 200 are arranged sequentially on one side of the production line, and there is a preset distance between them to facilitate the independent operation of the transfer component 300 and the shaking component 400.

[0028] The work process is as follows: When the sample container 700 moves along the production line to the front of one of the injection stations 200, the transfer component 300 corresponding to that injection station 200 is activated to transfer the sample container 700 from the production line to that injection station 200. Subsequently, the corresponding shaking component 400 operates to shake the sample container 700 located at the injection station 200.

[0029] When the sample container 700 moves along the production line to the front of another sample inlet station 200, the transfer component 300 corresponding to that sample inlet station 200 is activated, transferring the sample container 700 from the production line to that sample inlet station 200. Subsequently, the corresponding shaking component 400 operates to shake the sample container 700 located at that sample inlet station 200.

[0030] During this process, the transfer and mixing operations on the two injection stations 200 can be carried out independently and in parallel without interfering with each other.

[0031] Once the sample container 700 at one of the injection stations 200 has finished shaking, the analytical instrument extracts the sample from the sample container 700 for analysis. Meanwhile, the shaking operation at the other injection station 200 is still in progress or has been completed and is awaiting sample extraction.

[0032] Once the analytical instrument has completed its analysis, the sample can be directly extracted from the sample container 700 at another injection station 200 for further analysis.

[0033] This ensures the analyzer operates continuously and improves its utilization rate when the sampling and analysis time is longer than the injection and mixing time; it also maximizes the utilization rate of the analyzer when the sampling and analysis time is shorter than the injection and mixing time.

[0034] It should be understood that when certain sample tests do not require shaking, two injection stations can be used simultaneously, eliminating the waiting time for samples to flow through the production line and improving the utilization rate of the analytical instruments.

[0035] Alternatively, in other embodiments, N is 3, 4, or 5.

[0036] In this embodiment, the shaking assembly 400 includes a shaking drive 410, a shaking clamp 430, and a shaking transmission 420. The shaking clamp 430 is disposed at the sample injection station 200 and is used to clamp the sample container 700. The shaking transmission 420 is connected between the shaking drive 410 and the shaking clamp 430, and is used to transmit the power of the shaking drive 410 to the shaking clamp 430 to drive the shaking clamp 430 and the sample container 700 it clamps to perform shaking motion. Specifically, through the combination of the shaking drive 410, the shaking clamp 430, and the shaking transmission 420, reliable clamping and stable shaking of the sample container 700 are achieved. The shaking drive 410 provides precise and controllable power, the shaking transmission 420 realizes the conversion of motion form and power transmission, and the shaking clamp 430 ensures the stability of the sample container 700 during the shaking process. This structural design enables the shaking operation on each sample injection station 200 to be carried out independently and reliably, providing a structural basis for the parallel processing of multiple sample containers 700 and supporting the realization of the time-series overlap of transfer operation, shaking operation and analysis operation on a single analytical instrument.

[0037] In this embodiment, the shaking drive 410 is a brushless motor, which is installed below the sample injection station 200.

[0038] Alternatively, in other embodiments, the shaking drive 410 is a hydraulic cylinder or a pneumatic cylinder.

[0039] In this embodiment, the shaking transmission component 420 is a cam mechanism.

[0040] Alternatively, in other embodiments, the shaking transmission member 420 is one of a gear and rack mechanism, a crank-slider mechanism, or an eccentric connecting rod mechanism.

[0041] In this embodiment, the shaking clamping component 430 includes: a shaking base plate 431, rotatably mounted at the sample injection station 200 and connected to the shaking transmission component 420, used to support the sample container 700 and drive it to perform shaking motion; multiple clamping vertical plates 432, at least two clamping vertical plates 432 are respectively disposed on opposite sides of the shaking base plate 431, used to form a clamping space on the side of the sample container 700; at least two contouring adjustment springs 433, each clamping vertical plate 432 is provided with at least one contouring adjustment spring 433, the contouring adjustment spring 433 has a contoured curved surface adapted to the outer wall of the sample container 700, the contouring adjustment spring 433 is used to provide elastic clamping force to the sample container 700 located in the clamping space, and guides the sample container 700 to adjust its posture during the clamping process through the contoured curved surface. Specifically, when the transfer component 300 operates to transfer the sample container 700 from the assembly line to the sample loading station 200, the contouring and orientation adjustment spring 433 is compressed and undergoes elastic deformation during the transfer of the sample container 700. After the sample container 700 is transferred into the clamping space, if the posture of the sample container 700 is tilted or offset, the contact between the contouring surface and the outer wall of the sample container 700 will generate elastic deformation, producing a guiding force on the sample container 700 to adjust the sample container 700 to a preset posture. This process is repeated multiple times during the contouring and orientation adjustment process. With the coordinated action of the elastic bar 433, the sample container 700 is automatically guided to the correct posture, providing a stable posture for subsequent sampling; and through at least two contouring and attitude adjustment elastic bars 433, multi-point elastic clamping is achieved, so that the sample container 700 remains stable during the shaking process, avoiding shaking or dislodging, and maintaining the consistency of the shaking effect; the elastic clamping method has a certain tolerance for the slight differences in the outer diameter of the sample container 700, which can adapt to the manufacturing tolerances of sample containers 700 of the same specification, and even adapt to the differences in the outer diameter of sample containers 700 of similar specifications.

[0042] Optionally, in one embodiment, three clamping vertical plates 432 are provided, two of which are respectively disposed on opposite sides of the shaking base plate 431, and the other clamping vertical plate 432 is disposed in the area between the two clamping vertical plates 432, so as to position and support the sample container 700.

[0043] Optionally, multiple contouring and attitude adjustment springs 433 are arranged vertically along the clamping vertical plate 432.

[0044] In this embodiment, a rotating shaft is provided below the shaking base plate 431. The rotating shaft is mounted on the base of the sample injection station 200 through a bearing. The rotating shaft is connected to the output end of the shaking transmission component 420. When the shaking transmission component 420 transmits power, the shaking base plate 431 reciprocates around the axis of the rotating shaft, thereby driving the sample container 700 on it to perform shaking motion.

[0045] Optionally, the upper surface of the shaking base plate 431 is a bearing surface for placing the sample container 700. The bearing surface can be designed according to the bottom shape of the sample container 700.

[0046] Optionally, the bearing surface is provided with anti-slip texture.

[0047] In this embodiment, the two clamping vertical plates 432 are perpendicular to the upper surface of the shaking base plate 431 and are arranged opposite each other along the length direction of the shaking base plate 431.

[0048] In this embodiment, the shaking assembly 400 also includes a shaking sensor. The shaking sensor is set at the sample injection station 200 and is located at the preset stop position of the movement trajectory of the shaking base plate 431. It is used to detect whether the shaking clamp 430 has moved to the preset stop position after the shaking operation is completed, and to issue a stop signal when the shaking clamp 430 is detected to have moved to the preset stop position, so that the shaking clamp 430 stops accurately at the preset stop position.

[0049] In this embodiment, a shaking controller is also included, which is used to control the shaking sensor and the shaking drive 410 to work together.

[0050] Specifically, when the shaking drive 410 drives the shaking clamp 430 in a reciprocating shaking motion, the shaking sensor does not participate in the control during this stage, or although it continuously detects, it does not serve as a stop signal, so as to avoid the normal movement during the shaking process being misjudged as the stop position and stopping prematurely. After the shaking operation is completed, the controller controls the shaking drive 410 to slowly decelerate according to the preset program to reduce overshoot caused by inertia and improve stopping accuracy. During this stage, when the shaking clamp 430 moves to the preset stop position, the shaking sensor sends a stop signal. After receiving the stop signal, the controller immediately sends a stop command to the shaking drive 410, cuts off the power output or starts the brake, so that the shaking clamp 430 stops precisely at the preset stop position. This ensures the accurate docking of the sample container 700 with subsequent operations, avoids operation failure or component interference caused by position deviation, and also helps to improve the level of automation, enabling the device to operate continuously and stably for a long time.

[0051] Optionally, the shaking sensor can be a photoelectric sensor, a Hall sensor, or a magnetic grating sensor.

[0052] Optionally, the shaking controller is an industrial control component such as a PLC, a microcontroller, or an embedded processor, and the control program running inside it is a conventional closed-loop control algorithm in this field.

[0053] Optionally, the shaking clamp 430 is provided with a light-shielding plate that cooperates with the shaking sensor. The light-shielding plate is installed on the side or bottom of the shaking clamp 430 and moves together with the shaking clamp 430.

[0054] In this embodiment, the multi-station sampling device 100 further includes a sampling component 500, which includes a sampling needle 510 for inserting into the sample container 700, a sampling drive mechanism 520 connected to the sampling needle 510 for driving the sampling needle 510 to rotate circumferentially around a vertical axis and to move vertically, and a sampling pump 530 connected to the sampling needle 510 for extracting the sample from the sample container 700 through the sampling needle 510. The N sampling stations 200 are located below the motion trajectory formed by the circumferential rotation of the sampling needle 510. Specifically, after the sample container 700 at a certain injection station 200 has been shaken, the sampling drive mechanism 520 drives the sampling needle 510 to rotate circumferentially around a vertical axis until the sampling needle 510 is directly above the injection station 200; after the sampling needle 510 has rotated into position, the sampling drive mechanism 520 drives the sampling needle 510 to descend vertically to pierce into the sample container 700; after the sampling needle 510 has pierced into position, the sampling pump 530 extracts the sample from the sample container 700 through the sampling needle 510 and delivers it to the analytical instrument at the analysis station for subsequent detection and analysis; after the sample extraction is completed, the sampling drive mechanism 520 drives the sampling... The needle 510 moves vertically upwards and exits the sample container 700; after the sampling needle 510 exits, it can wait for subsequent instructions; this solution can cover all the sample injection stations 200 by the rotational movement of a single sampling component 500, without the need to set up a separate sampling component 500 for each station, simplifying the device structure and reducing costs; after the sample container 700 is shaken at the sample injection station 200, the sampling component 500 extracts the sample and transports it to the analytical instrument. The sample container 700 itself does not need to be transported, thus realizing the parallel processing of shaking and analysis, providing a basis for the overlap of transport operation, shaking operation, sampling operation and analysis operation in the time sequence of a single analytical instrument.

[0055] Optionally, the sampling pump 530 can be a syringe pump, a peristaltic pump, or a diaphragm pump.

[0056] In this embodiment, the sampling assembly 500 further includes a sampling multi-way valve 540 and an air pump 550. The sampling multi-way valve 540 is connected to the sampling needle 510, the sampling pump 530 and the air pump 550 respectively, and is used to connect the sampling needle 510 and the sampling pump 530 so that the sampling pump 530 can extract the sample in the sample container 700 through the sampling needle 510, or connect the sampling needle 510 and the air pump 550 so that the air pump 550 can blow air into the sample in the sample container 700 through the sampling needle 510. Specifically, when extracting a sample, the sampling multi-way valve 540 connects the sampling needle 510 and the sampling pump 530 so that after the sampling needle 510 is inserted into the sample in the sample container 700, the sampling pump 530 extracts the sample through the sampling multi-way valve 540 and the sampling needle 510. When it is necessary to blow air to mix the sample, the sampling multi-way valve 540 connects the sampling needle 510 and the air pump 550 so that the air pump 550 blows air into the sample in the sample container 700 through the sampling multi-way valve 540 and the sampling needle 510 to mix the sample.

[0057] In this embodiment, the sample injection device 100 achieves shaking and mixing of the sample through the shaking component 400 and blowing and mixing of the sample through the sampling component 500. The two work together to achieve multiple mixing modes, namely shaking and mixing alone, blowing and mixing alone, and shaking and blowing together, so as to meet the mixing requirements of different samples when detecting different parameters and improve the mixing effect.

[0058] Alternatively, the air pump 550 can be a miniature diaphragm pump, a plunger pump, or an electromagnetic pump.

[0059] Optionally, the sampling multi-way valve 540 is a rotary switching valve or a solenoid valve assembly.

[0060] In this embodiment, the sampling drive mechanism 520 includes a sampling arm 521 connected to the sampling needle 510, a rotation drive 522 connected to the sampling arm 521 for driving the sampling arm 521 to rotate circumferentially around a vertical axis, and a lifting drive 523 connected to the sampling arm 521 for driving the sampling arm 521 to rise and fall vertically. The rotation drive 522 and the lifting drive 523 are controlled independently so that the rotational movement and the lifting movement of the sampling arm 521 do not interfere with each other, thereby avoiding positioning errors caused by linkage drive and improving the positioning accuracy of the sampling needle 510 at the sample injection station 200. Specifically, the rotary drive 522 provides radial and circumferential limits for the sampling arm 521, while the lifting drive 523 provides radial and axial limits for the sampling arm 521. When the rotary drive 522 drives the sampling arm 521 to rotate circumferentially around a vertical axis, the sampling arm 521 moves circumferentially relative to the lifting drive 523. When the lifting drive 523 drives the sampling arm 521 to move vertically, the sampling arm 521 moves vertically relative to the rotary drive 522. Rotation and lifting are independently controlled by independent drive sources, avoiding positioning errors caused by motion coupling and transmission gap accumulation in traditional linkage drive mechanisms, thus significantly improving the positioning accuracy of the sampling needle 510. High-precision positioning ensures that the sampling needle 510 can accurately pierce the sample container 700, improving the sampling success rate. Independent control of rotation and lifting allows for flexible timing arrangements, enabling optimization of the action flow according to different sample characteristics and analytical needs, thereby improving overall efficiency.

[0061] Optionally, the rotary drive 522 is a combination of a motor and a pulley mechanism.

[0062] Optionally, the lifting drive 523 is a combination of a motor and a pulley mechanism.

[0063] Optionally, the sampling arm 521 extends vertically upward first, then horizontally, and finally vertically upward to form the shape.

[0064] Optionally, the sampling arm 521 is connected to the rotary drive 522 via a sliding bearing and to the lifting drive 523 via a rolling bearing.

[0065] In this embodiment, the sampling needle 510 includes a puncture needle tip and a sample delivery needle tube. The puncture needle tip is a solid pointed cone shape. The sample delivery needle tube is connected to the puncture needle tip and has a hollow sample delivery channel. A hollow structure is provided at the connection between the puncture needle tip and the sample delivery needle tube. The hollow structure is connected to the sample channel so that the sampling needle 510 can introduce the sample into the sample channel through the hollow structure while maintaining its puncture capability. Specifically, the puncture needle tip is located at the very front of the sampling needle 510 and is used to puncture the septum of the sample container 700. The puncture needle tip is a solid cone shape with extremely high strength and sharpness, which can easily penetrate into the sample container 700 and is not easily bent or deformed. It can still maintain good puncture performance after long-term use, and the sampling needle 510 has a long service life. The hollow structure provides a smooth entry channel for the sample, ensuring sampling efficiency. This "solid front, hollow back, and open middle" design not only retains the high strength advantage of the solid needle tip, but also realizes the smooth introduction of the sample, truly achieving a balance between puncture capability and sampling capability. It effectively solves the technical problems of existing straight needle tubes being difficult to puncture the septum, and narrow-diameter needle tubes being easy to puncture the septum but limiting the liquid flow rate.

[0066] In this embodiment, the multi-station sampling device 100 further includes a cleaning assembly 600, which includes a cleaning tank 610, a cleaning multi-way valve 620, a drain pipe 630, and a liquid pump 640. The cleaning tank 610 is used to contain cleaning media and waste liquid. The cleaning multi-way valve 620 is connected to the cleaning tank 610, the drain pipe 630, and the liquid pump 640 respectively, and is used to connect the cleaning tank 610 and the drain pipe 630 so that the waste liquid in the cleaning tank 610 is discharged through the drain pipe 630, or to connect the cleaning tank 610 and the liquid pump 640 so that the cleaning media is delivered into the cleaning tank 610 through the liquid pump 640. The cleaning tank 610 is located below the motion trajectory formed by the circumferential rotation of the sampling needle 510. Specifically, after the sampling component 500 completes sampling, to avoid cross-contamination, the sampling component 500 controls the sampling needle 510 to be inserted into the cleaning tank 610, and the air pump 550 operates to discharge the waste liquid in the sampling component 500 into the cleaning tank 610. At this time, the cleaning multi-way valve 620 connects the cleaning tank 610 and the drain pipe 630, and the waste liquid in the cleaning tank 610 is discharged through the drain pipe 630. The cleaning multi-way valve 620 then connects the cleaning tank 610 and the liquid pump 640 to deliver cleaning medium into the cleaning tank 610 through the liquid pump 640 to clean the outer surface of the sampling needle 510.

[0067] Optionally, the cleaning tank 610 is provided with multiple partitions, each containing a different cleaning medium, to meet the cleaning needs of different samples.

[0068] Optionally, the cleaning medium may be pure water, organic solvent, acid, alkali or surfactant.

[0069] Optionally, the cleaning multi-way valve 620 can be a solenoid valve, an electric valve, or a pneumatic valve.

[0070] Alternatively, the pump 640 can be a diaphragm pump, peristaltic pump, gear pump, or centrifugal pump.

[0071] In this embodiment, the cleaning assembly 600 further includes a level sensor and a level controller. The level sensor detects the level of the cleaning medium in the cleaning tank 610 and generates a level signal. The level controller is electrically connected to both the level sensor and the pump 640. The level controller receives the level signal and controls the pump 640 to operate according to the level signal, so that the cleaning medium in the cleaning tank 610 is maintained within a preset level range. Specifically, when the level sensor detects the level of the cleaning medium in the cleaning tank 610 in real time and generates a level signal, and when the level of the cleaning medium in the cleaning tank 610 is detected to be lower than the preset level range, the level controller controls the pump 640 to operate to replenish the cleaning medium in the cleaning tank 610. When the level reaches the upper limit, the level controller controls the pump 640 to stop operating, thereby realizing automatic replenishment of the cleaning medium and level control.

[0072] Optionally, the liquid level sensor can be a float sensor, a capacitive sensor, an ultrasonic sensor, or a photoelectric sensor.

[0073] Optionally, the level controller is an industrial control component such as a PLC, microcontroller, or embedded processor, and the control program running inside it is a conventional closed-loop control algorithm in this field.

[0074] Optionally, the level controller and displacement controller can be integrated and deployed together.

[0075] Optionally, a heater is provided in the cleaning tank 610 to heat the cleaning medium, thereby improving the cleaning effect on oily samples.

[0076] Optionally, an ultrasonic generator is installed in the cleaning tank 610 to apply ultrasonic waves to the cleaning medium, effectively removing minute residues on the inner and outer walls of the sampling needle 510 and improving the cleaning effect.

[0077] In this embodiment, the transfer component 300 includes a push-pull linkage 310, a push-pull drive 320, and a push-pull part 330. The push-pull linkage 310 is connected to the drive end of the push-pull drive 320 and the push-pull part 330, respectively. The push-pull drive 320 is used to drive the push-pull part 330 to reciprocate in the horizontal direction through the push-pull linkage 310. The push-pull part 330 has a U-shaped structure with an opening facing downwards, and is used to fix and suspend above the assembly line of the sample container 700 in the non-working state, and to form a barrier-free connection between the sample container 700 and the bearing surface of the assembly line. The push-pull part 330 moves towards the sample injection station 200, pulling the sample container 700 located inside the push-pull part 330 back from the production line to the sample injection station 200. After the sample container 700 is tested, the push-pull part 330 moves in the opposite direction, pushing the sample container 700 from the sample injection station 200 onto the production line. After the push-pull part 330 completes the pushing and returns to its initial position, the push-pull part 330 is fixed and suspended above the production line, allowing the sample container 700 to pass through the channel without obstruction, achieving obstacle avoidance in a static geometric manner.

[0078] Specifically, the push-pull section 330, arranged in a U-shape with its opening facing downwards, is fixedly suspended above the sample container 700's assembly line in the non-working state, naturally forming a channel between itself and the assembly line's bearing surface, allowing the sample container 700 to pass through unobstructed. With this configuration, in the non-working state, the sample container 700 is normally transported along the assembly line through the channel. In the working state, the push-pull drive 320, through the push-pull linkage 310, moves the push-pull section 330 towards the sample inlet station 200, thus moving the sample container 700 located within the push-pull section 330... The sample container 700 is pulled back from the assembly line to the sample loading station 200 for testing. After testing, the push-pull drive 320 drives the push-pull part 330 to move in the opposite direction via the push-pull linkage 310, pushing the sample container 700 from the sample loading station 200 back onto the assembly line. After the push-pull part 330 completes the push and returns to its initial position, it is fixed and suspended above the assembly line again. Without any additional avoidance action, the sample container 700 can pass through the channel unobstructed, achieving avoidance through static geometry. This solution is similar to... Compared with existing technologies, the traditional "active dynamic avoidance" is transformed into "static geometric avoidance", which is a fundamental breakthrough in the avoidance mechanism and completely avoids complex avoidance action planning. On this basis, the entire process of pulling back, pushing and avoiding the sample container 700 can be completed by the single-axis horizontal reciprocating motion of the push-pull linkage 310, the push-pull drive 320 and the push-pull part 330. The motion dimension is reduced from multi-dimensional to single-axis, the structural complexity is significantly reduced, the control logic is simplified from complex algorithm to forward and reverse switch control, the manufacturing and maintenance costs are greatly reduced, and the reliability of the device is significantly improved due to the reduction of moving parts. Since the sample introduction device 100 has a simple structure and low cost, a corresponding sample introduction device 100 can be independently configured for each analytical instrument to realize the distributed layout of "one machine, one instrument". This design significantly improves the overall detection throughput and completely eliminates the sample transfer queuing problem caused by one robotic arm serving multiple analytical instruments in the existing solution, fundamentally solving the transfer efficiency bottleneck in high-throughput detection scenarios.

[0079] In this embodiment, the push-pull drive component 320 is a linear motion drive element, which can be an electric push rod, a linear motor, a cylinder or a hydraulic cylinder, etc.

[0080] In this embodiment, the push-pull linkage 310 is a single-rod structure arranged horizontally, and is fixedly connected to the drive end of the push-pull drive 320 and the push-pull part 330 respectively.

[0081] Alternatively, in another embodiment, the push-pull linkage 310 is one of a linkage mechanism, a gear and rack mechanism, a lead screw mechanism, or a synchronous belt mechanism.

[0082] Optionally, the height of the channel is greater than the height of the sample container 700, and a gap is provided between the inner wall of the push-pull part 330 and the sample container 700 to avoid frictional interference when the sample container 700 moves.

[0083] Optionally, the sample container 700 is a vessel for holding the sample to be tested, and is one of the following: sample bottle, test tube, sample cup, centrifuge tube, reaction tube, and cuvette.

[0084] It should be understood that "fixed hovering" means that the push-pull part 330 is fixed at a certain height position through the push-pull linkage 310.

[0085] In this embodiment, the transfer assembly 300 further includes a displacement controller and a displacement sensor. The displacement sensor is disposed on the push-pull linkage 310 or the push-pull drive 320, and is used to detect the position of the push-pull linkage 310 and generate a displacement signal. The displacement controller is electrically connected to both the displacement sensor and the push-pull drive 320, and is used to receive the displacement signal and control the operation of the push-pull drive 320 according to the displacement signal, so as to achieve precise control of the position of the push-pull part 330. Specifically, during operation, when the push-pull part 330 needs to perform a pull-back or push-up action, the displacement controller sends a start command to the push-pull drive 320, and the push-pull drive 320 drives the push-pull part 330 to start moving through the push-pull linkage 310. The displacement sensor monitors the position of the push-pull linkage 310 in real time and feeds back the displacement signal to the displacement controller. The displacement controller compares the received real-time position with the preset target position (e.g., the sample injection station 200 position, the initial hovering position), and adjusts the operating parameters of the push-pull drive 320 (e.g., motor speed, running direction, start and stop timing) according to the comparison result until the push-pull part 330 accurately reaches the target position, and then controls the push-pull drive 320 to stop. Through the cooperation of the displacement sensor and the displacement controller, closed-loop control of the push-pull part 330's position is achieved, enabling the push-pull part 330 to accurately stop at the preset target position. This eliminates positioning errors caused by factors such as mechanical wear, load changes, and performance fluctuations of the push-pull drive 320, ensuring that the sample container 700 can be accurately pulled back to the sample injection station 200 each time, providing an accurate positional reference for subsequent operations such as detection, mixing, and sample injection.

[0086] Optionally, the displacement controller is an industrial control component such as a PLC, a microcontroller, or an embedded processor, and the control program running inside it is a conventional closed-loop control algorithm in this field.

[0087] Alternatively, the displacement sensor can be a magnetic grating sensor, an optical grating sensor, or a Hall sensor, and the specific choice can be determined based on accuracy requirements and cost budget.

[0088] The sample testing system of this embodiment includes the multi-station sample introduction device 100 described above. Specifically, by employing the multi-station sample introduction device 100 in the sample testing system, the processing cycle of batch samples is greatly shortened, the throughput efficiency of the production line is improved, and the requirements for high-throughput and high-efficiency environmental monitoring are met.

[0089] In summary, after reading the detailed disclosure of this specification, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this specification requires various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this specification and are within the spirit and scope of the exemplary embodiments described herein.

[0090] Furthermore, certain terms in this specification have been used to describe embodiments of this specification. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this specification. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be suitably combined in one or more embodiments of this specification.

[0091] It should be understood that in the foregoing description of the embodiments in this specification, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the description and aiding in the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this specification. That is, the embodiments in this specification can also be understood as an integration of multiple secondary embodiments. It is also valid when each secondary embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0092] Finally, it should be understood that the embodiments disclosed in this specification are illustrative of the principles of the embodiments described in this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are merely examples and not limitations. Those skilled in the art can implement the applications in this specification using alternative configurations based on the embodiments in this specification. Therefore, the embodiments in this specification are not limited to the embodiments precisely described in the applications.

Claims

1. A multi-station sample introduction device, characterized in that, include: N injection stations (200) are used to be arranged at intervals along the production line, where N is an integer greater than 1; N transfer components (300) are set up one-to-one with N sample injection stations (200). Each transfer component (300) is used to transfer the sample container (700) from the production line to the corresponding sample injection station (200). N shaking components (400) are set up one-to-one with N sample injection stations (200). Each shaking component (400) is used to shake the sample container (700) located on the corresponding sample injection station (200). The multi-station injection device (100) is configured such that the transfer operation and mixing operation on the N injection stations (200) and the analysis operation of the sample in the sample container (700) in the analyzer can be performed in the time sequence of a single analyzer.

2. The multi-station sample introduction device according to claim 1, characterized in that, The shaking assembly (400) includes a shaking drive (410), a shaking clamp (430), and a shaking transmission (420). The shaking clamp (430) is disposed at the sample injection station (200) and is used to clamp the sample container (700). The shaking transmission (420) is connected between the shaking drive (410) and the shaking clamp (430) and is used to transmit the power of the shaking drive (410) to the shaking clamp (430) so as to drive the shaking clamp (430) and the sample container (700) it clamps to perform shaking motion.

3. The multi-station sample introduction device according to claim 2, characterized in that, The shaking clamp (430) includes: The shaking base plate (431) is rotatably installed at the sample injection station (200) and connected to the shaking transmission component (420) to carry the sample container (700) and drive it to shake. Multiple clamping vertical plates (432), at least two clamping vertical plates (432) are respectively disposed on opposite sides of the shaking base plate (431) to form a clamping space on the side of the sample container (700); At least two contouring attitude adjustment springs (433) are provided on each clamping vertical plate (432). The contouring attitude adjustment springs (433) have contoured curved surfaces adapted to the outer wall of the sample container (700). The contouring attitude adjustment springs (433) are used to provide elastic clamping force to the sample container (700) located in the clamping space and guide the sample container (700) to adjust its attitude during the clamping process through the contoured curved surfaces.

4. The multi-station sample introduction device according to claim 3, characterized in that, The shaking assembly (400) also includes a shaking sensor, which is set at the sample injection station (200) and located at the preset stop position of the movement trajectory of the shaking base plate (431). The shaking sensor is used to detect whether the shaking clamp (430) has moved to the preset stop position after the shaking operation is completed, and to issue a stop signal when the shaking clamp (430) is detected to have moved to the preset stop position, so that the shaking clamp (430) stops accurately at the preset stop position.

5. The multi-station sample introduction device according to any one of claims 1-4, characterized in that, The multi-station sampling device (100) also includes a sampling assembly (500), which includes a sampling needle (510) for inserting into a sample container (700), a sampling drive mechanism (520) connected to the sampling needle (510) for driving the sampling needle (510) to rotate circumferentially around a vertical axis and to move vertically, and a sampling pump (530) connected to the sampling needle (510) for extracting samples from the sample container (700) through the sampling needle (510). The N sampling stations (200) are located below the motion trajectory formed by the circumferential rotation of the sampling needle (510).

6. The multi-station sample introduction device according to claim 5, characterized in that, The sampling drive mechanism (520) includes a sampling arm (521) connected to the sampling needle (510), a rotary drive (522) connected to the sampling arm (521) for driving the sampling arm (521) to rotate circumferentially around a vertical axis, and a lifting drive (523) connected to the sampling arm (521) for driving the sampling arm (521) to rise and fall vertically. The rotary drive (522) and the lifting drive (523) are controlled independently so that the rotational movement and the lifting movement of the sampling arm (521) do not interfere with each other, thereby avoiding positioning errors caused by linkage drive and improving the positioning accuracy of the sampling needle (510) at the sample injection station (200).

7. The multi-station sample introduction device according to claim 5, characterized in that, The sampling needle (510) includes a puncture needle tip and a sample delivery needle tube. The puncture needle tip is a solid cone shape. The sample delivery needle tube is connected to the puncture needle tip and has a hollow sample channel. A hollow structure is provided at the connection between the puncture needle tip and the sample delivery needle tube. The hollow structure is connected to the sample channel so that the sampling needle (510) can guide the sample into the sample channel through the hollow structure while maintaining its puncture capability.

8. The multi-station sample introduction device according to claim 5, characterized in that, The multi-station sampling device (100) also includes a cleaning assembly (600), which includes a cleaning tank (610), a cleaning multi-way valve (620), a drain pipe (630), and a liquid pump (640). The cleaning tank (610) is used to contain cleaning media and waste liquid. The cleaning multi-way valve (620) is connected to the cleaning tank (610), the drain pipe (630), and the liquid pump (640) respectively, for connecting the cleaning tank (610) and the drain pipe (630) so that the waste liquid in the cleaning tank (610) can be discharged through the drain pipe (630), or connecting the cleaning tank (610) and the liquid pump (640) so that the cleaning media can be delivered to the cleaning tank (610) through the liquid pump (640). The cleaning tank (610) is located below the motion trajectory formed by the circumferential rotation of the sampling needle (510).

9. The multi-station sample introduction device according to any one of claims 1-4, characterized in that, The transfer assembly (300) includes a push-pull linkage (310), a push-pull drive (320), and a push-pull part (330). The push-pull linkage (310) is connected to the drive end of the push-pull drive (320) and the push-pull part (330) respectively. The push-pull drive (320) is used to drive the push-pull part (330) to reciprocate in the horizontal direction through the push-pull linkage (310). The push-pull part (330) has a U-shaped structure with the opening facing downward. It is used to be fixed and suspended above the flow line of the sample container (700) in the non-working state, and forms a channel between it and the bearing surface of the flow line that allows the sample container (700) to pass through without obstruction. When the push-pull section (330) moves toward the sample injection station (200), it pulls the sample container (700) located in the push-pull section (330) back from the production line to the sample injection station (200); After the sample container (700) has been tested, the push-pull part (330) moves in the opposite direction, pushing the sample container (700) from the sample loading station (200) onto the production line; After the push-pull part (330) completes the push and returns to the initial position, the push-pull part (330) is fixed and suspended above the production line again, so that the sample container (700) can pass through the channel without obstruction, and avoidance is achieved in a static geometric way.

10. A sample detection system, characterized in that, Includes the multi-station sample introduction device according to any one of claims 1-9.

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