A reagent quantitative sampling device

Abstract

The utility model discloses a reagent quantitative sampling device, including measuring cup, liquid supply pipeline, quantitative stick, drive mechanism, back liquid subassembly and liquid discharge subassembly. Quantitative stick can insert the inside of measuring cup to define its volume, and drive mechanism controls quantitative stick and moves along the vertical direction, back liquid subassembly is used for discharging the excess reagent of exceeding the limited volume, and liquid discharge subassembly includes stop valve and liquid outlet channel, is used for the reagent after quantitative output to the external container. Through the control quantitative stick position and combine overflow back liquid and automatic liquid discharge structure, realize the high accuracy quantitative of reagent and automatic sampling, compact structure, convenient operation is applicable to hospital clinical laboratory etc. scene.

Description

Technical Field

[0001] This utility model relates to the technical field of sampling devices, and in particular to a reagent quantitative sampling device. Background Technology

[0002] In the daily work of hospital laboratories, reagents are used extremely frequently, especially in various tests such as blood, biochemistry, and immunology. The accuracy of reagent sampling directly affects the accuracy of test results. Currently, most reagent sampling operations still rely on manual or semi-automatic equipment, which generally suffers from problems such as inaccurate quantification, complex operating procedures, and low efficiency. This not only increases the workload of laboratory personnel but may also lead to testing errors, affecting the scientific rigor and reliability of clinical diagnosis.

[0003] To improve sampling accuracy, some testing equipment uses methods such as weighing or photoelectric sensing for reagent measurement. However, these methods often have high requirements for the operating environment, complex equipment maintenance, and relatively high costs. Their widespread application in small and medium-sized medical institutions is challenging. Furthermore, traditional titration or visual measurement methods are still in use, which have significant quantitative errors and are heavily influenced by operator experience, lacking standardization and consistency.

[0004] Therefore, there is an urgent need to provide a reagent quantitative sampling device that is simple in structure, easy to operate, and has high quantitative accuracy, in order to solve the problems of complex operation, inaccurate quantification, and poor repeatability in existing technologies. Especially in laboratories that require high-throughput sample processing, there is an urgent need for a quantitative device that can automatically control the reagent sampling volume and ensure consistent sampling in each sample.

[0005] In view of this, the inventors specifically designed a reagent quantitative sampling device, which led to this invention. Utility Model Content

[0006] (a) Technical problems to be solved The purpose of this application is to provide a reagent quantitative sampling device that at least solves the problems of inaccurate quantification, reliance on manual experience, poor repeatability, and liquid waste in the reagent sampling process of existing hospital laboratories, thereby improving the accuracy and automation level of reagent sampling.

[0007] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides the following technical solution: This application provides a reagent quantitative sampling device, comprising: Measuring cups are used to hold reagents; A liquid supply line is used to inject reagents into the measuring cup; A measuring rod, one end of which can be inserted into the measuring cup to define the volume of the measuring cup; A drive mechanism is used to control the movement of the metering rod in the vertical direction; A return component is used to discharge excess reagent that exceeds the volume limit of the metering rod; The dispensing assembly is used to dispense the reagent from the measuring cup into an external container; The quantitative volume of the reagent is determined by controlling the position of the metering rod, and sampling is completed by the return liquid assembly and the draining mechanism.

[0008] In a further embodiment, the driving mechanism is a servo motor, and the metering bar includes a lead screw and nut connected to the servo motor.

[0009] In a further embodiment, the lead screw and nut structure is connected to a coupling for transmitting the rotational motion of the servo motor to the lead screw and nut.

[0010] In a further embodiment, the measuring cup is a cylindrical container that is closed at one end and open at the other, with its top connected to the liquid supply pipe and its bottom connected to the liquid drainage assembly.

[0011] In a further embodiment, the return assembly includes a reagent tank fitted onto the measuring cup and a return pipe connecting to the bottom of the reagent tank for return flow.

[0012] In a further embodiment, the drain assembly includes at least one shut-off valve and a drain channel connected to the measuring cup.

[0013] In a further embodiment, the liquid outlet channel in the draining mechanism is located at the bottom of the measuring cup and is controlled to open and close by the shut-off valve.

[0014] In a further embodiment, the reagent tank is a sealed container with a liquid level observation window, and the reagent is delivered to the measuring cup by gravity or pressure.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention has the following advantages: By using an adjustable-height quantitative rod in conjunction with a return component, high-precision quantitative sampling with physical positioning can be achieved, avoiding the errors and instabilities caused by traditional methods relying on liquid level sensors or visual inspection. The device uses a servo motor to drive the quantitative rod to move vertically, and the effective volume of the measuring cup is precisely limited by controlling the position of the rod, ensuring the consistency of reagent volume from the source. In addition, the reagent tank and reflux pipe structure in the return component enable automatic reagent return after quantification, avoiding waste. The drain component is located at the bottom of the measuring cup and, together with an electrically controlled shut-off valve, enables rapid and automatic liquid discharge. The overall structure is compact, easy to operate, and highly automated, making it suitable for the large-volume, standardized sampling needs of hospital laboratories and other similar settings.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] in: Figure 1 This is a schematic diagram of the principle and structure of this utility model.

[0018] Label Explanation: 1. Measuring cup; 2. Liquid supply pipe; 3. Metering rod; 4. Drive mechanism; 5. Liquid return assembly; 51. Reagent tank; 52. Reflux pipe; 6. Drain assembly; 61. Shut-off valve; 62. Liquid outlet channel; 7. Screw nut; 8. Coupling; 9. Observation window. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] The following detailed description of the reagent quantitative sampling device of this utility model, with reference to a preferred embodiment, aims to address the pain points of reagent sampling in hospital laboratories and other similar settings, such as reliance on manual operation, large quantitative errors, and low automation. It provides a reagent quantitative solution that is structurally sound, stable in operation, highly accurate, and repeatable.

[0021] like Figure 1 As shown, the device comprises a measuring cup 1, a liquid supply pipe 2, a metering rod 3, a drive mechanism 4, a liquid return assembly 5, and a liquid discharge assembly 6. The measuring cup 1 is preferably a cylindrical structure with one end closed and the other open, with a liquid supply port at the top and a liquid outlet at the bottom for temporarily storing the injected reagent. One end of the liquid supply pipe 2 is connected to an external reagent tank 51, and the other end is connected to the liquid inlet at the top of the measuring cup 1. Liquid injection can be performed by gravity supply, or a peristaltic pump or pressurization system can be used to control the flow rate.

[0022] The quantitative rod 3 is a slender rod, one end of which can be vertically inserted into the measuring cup 1. The insertion depth determines the sample volume of the reagent and is a key physical limiting element in the entire quantitative process. The quantitative rod 3 is controlled by the drive mechanism 4 to move up and down vertically. A servo motor is preferably used as the power source, connected to the lead screw and nut 7 via a coupling 8, converting rotational motion into linear motion. This provides advantages such as high control precision and fast response. Users can set the insertion height of the quantitative rod 3 through the control system to achieve automatic switching between different reagent volumes.

[0023] In the actual workflow, the target height of the metering rod 3 is first set according to the requirements. The system controls the servo motor to lower the metering rod 3 to the specified depth, at which point a controllable cavity is formed between the bottom of the measuring cup 1 and the bottom of the metering rod 3. Subsequently, the reagent is injected into the measuring cup 1 through the supply tube, and the liquid level gradually rises until the cavity is filled. When the amount of reagent exceeds this volume, the excess will naturally overflow from the top of the measuring cup 1, at which point the return liquid assembly 5 starts to work.

[0024] like Figure 1 As shown, the return liquid assembly 5 consists of a reagent tank 51 fitted outside the measuring cup 1 and a return pipe 52 connected to its bottom. When overflow occurs, the reagent flows into the reagent tank 51 and returns to the original liquid supply system or a preset recovery container via the return pipe 52 through gravity or siphon. The entire process does not require complex level sensors; automatic limiting and volume stability control are achieved through the structure itself, greatly improving quantitative accuracy and system stability.

[0025] After reagent filling is complete, the system controls the opening of the drainage component 6. Located at the bottom of the measuring cup 1, the drainage component 6 includes at least one electrically controlled shut-off valve 61 and a discharge channel 62, enabling the rapid discharge of the quantified reagent into the analytical tube, reaction vessel, or other operating modules. After drainage is complete, the shut-off valve 61 closes, and the quantitative probe 3 can be reset, preparing for the next round of sampling. The bottom drainage method reduces residual dead zones, improving reagent utilization and ease of cleaning.

[0026] Furthermore, to ensure ease of operation and monitoring functionality, the reagent tank 51 can be configured as a sealed container with a liquid level observation window 9, allowing operators to intuitively monitor the system's operating status and facilitating daily replenishment and maintenance. If equipped with a control system, a PLC control module can be selected in conjunction with a touch interface, enabling users to flexibly set parameters such as injection time, quantitative height, and drainage rhythm to meet the needs of complex scenarios.

[0027] Through the above-described structural synergistic design, this device achieves the following technical effects: 1. The physical limiting and height-adjustable structure of the quantitative rod 3 ensures accurate and consistent reagent volume in the measuring cup 1, with minimal quantitative error; 2. The overflow return structure provides automatic volume calibration capability, eliminating the need to rely on electrical signal sensors to determine the liquid level and improving stability; 3. The drainage component 6 has a reasonable structural design and works with the electrically controlled shut-off valve 61 to achieve rapid and residue-free output after quantitative drainage; 4. The entire process is programmable and controllable, adaptable to different quantitative requirements, with a high level of automation and easy operation, especially suitable for scenarios such as hospital laboratories where high accuracy of reagent dosage is required; 5. All components are compact in structure, suitable for integration into testing equipment or independent installation on laboratory benchtops, and are easy to maintain.

[0028] In summary, this invention achieves high precision, automation, and standardization in reagent quantitative operation through a composite structure of physical limiting, overflow self-stabilization, and automatic drainage. It overcomes the instability caused by traditional manual operation and provides hospitals and laboratories with a practical, stable, and reliable quantitative reagent supply solution.

[0029] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A reagent quantitative sampling device, characterized in that, include: Measuring cups are used to hold reagents; A liquid supply line is used to inject the reagent into the measuring cup; A measuring rod, one end of which can be inserted into the measuring cup to define the volume of the measuring cup; A drive mechanism is used to control the movement of the metering rod in the vertical direction; A return component is used to discharge excess reagent that exceeds the volume limit of the metering rod; The dispensing assembly is used to dispense the reagent from the measuring cup into an external container; The quantitative volume of the reagent is determined by controlling the position of the metering rod, and sampling is completed by the return liquid assembly and the draining liquid assembly.

2. The reagent quantitative sampling device according to claim 1, characterized in that, The driving mechanism is a servo motor, and the metering bar includes a lead screw and nut connected to the servo motor.

3. The reagent quantitative sampling device according to claim 2, characterized in that, The lead screw and nut structure is connected to a coupling for transmitting the rotational motion of the servo motor to the lead screw and nut.

4. The reagent quantitative sampling device according to claim 2, characterized in that, The measuring cup is a cylindrical container that is closed at one end and open at the other. Its top is connected to the liquid supply pipe and its bottom is connected to the liquid drainage assembly.

5. The reagent quantitative sampling device according to claim 1, characterized in that, The return assembly includes a reagent tank fitted onto the measuring cup and a return pipe connected to the bottom of the reagent tank for return flow.

6. The reagent quantitative sampling device according to claim 1, characterized in that: The drainage assembly includes at least one shut-off valve and a drainage channel connected to the measuring cup.

7. A reagent quantitative sampling device according to claim 6, characterized in that, The liquid outlet channel in the liquid discharge mechanism is located at the bottom of the measuring cup and is controlled to open and close by the shut-off valve.

8. A reagent quantitative sampling device according to claim 5, characterized in that, The reagent tank is a sealed container with a liquid level observation window, and the reagent is delivered to the measuring cup by gravity or pressure.

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