CN222671834U - Liquid suction amount measuring device and sample analyzer - Google Patents
Liquid suction amount measuring device and sample analyzer Download PDFInfo
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- CN222671834U CN222671834U CN202420578071.9U CN202420578071U CN222671834U CN 222671834 U CN222671834 U CN 222671834U CN 202420578071 U CN202420578071 U CN 202420578071U CN 222671834 U CN222671834 U CN 222671834U
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Abstract
本实用新型公开了一种吸液量测量装置及样本分析仪，该装置包括采样机构和测量机构，采样机构包括采样针、与采样针连接的管路组件，以及与管路组件连接的动力组件；测量机构包括测量容器和测量传感器；其中，动力组件用于通过管路组件驱动采样针吸取待测液，并将待测液转移至测量容器中，测量传感器用于对容置于测量容器中的待测液进行吸液量测量，从而获取采样针的吸液量。
The utility model discloses a liquid aspiration amount measuring device and a sample analyzer, the device comprises a sampling mechanism and a measuring mechanism, the sampling mechanism comprises a sampling needle, a pipeline assembly connected to the sampling needle, and a power assembly connected to the pipeline assembly; the measuring mechanism comprises a measuring container and a measuring sensor; wherein the power assembly is used to drive the sampling needle to absorb a liquid to be tested through the pipeline assembly and transfer the liquid to be tested to the measuring container, and the measuring sensor is used to measure the liquid aspiration amount of the liquid to be tested contained in the measuring container, thereby obtaining the liquid aspiration amount of the sampling needle.
Description
Technical Field
The utility model relates to the technical field of calibration, in particular to a liquid absorption amount measuring device and a sample analyzer.
Background
The sampling needle of the sample analyzer is designed to penetrate the rubber cap of the sample tube and withdraw a certain amount of sample. The sample amount extracted by the sampling needle depends on the preset liquid suction time length of the sampling needle and the negative pressure of a gas circuit connected with the puncture needle. In order to ensure that the actual liquid suction amount is basically consistent with the set quantitative, the liquid suction time length and the air path negative pressure of the sampling needle must be determined through precise calculation and long-time test.
However, the air tightness and the air pressure inside the sampling needle can change along with the use and replacement of the sampling needle, and the set imbibition time can also change along with the aging of the motor. These all affect the accuracy of the liquid suction and may lead to errors in the test results. Therefore, it is important to calibrate the liquid suction amount of the sampling needle regularly to eliminate inaccurate results of cell analysis due to larger errors of the liquid suction amount of the sample.
Disclosure of utility model
Based on this, it is necessary to provide a liquid suction amount measuring device and a sample analyzer to solve the problem that the liquid suction amount of the sampling needle cannot be accurately measured.
A liquid suction amount measuring device, the liquid suction amount measuring device comprising:
The sampling mechanism comprises a sampling needle, a pipeline assembly connected with the sampling needle and a power assembly connected with the pipeline assembly;
a measuring mechanism comprising a measuring container and a measuring sensor;
the power assembly is used for driving the sampling needle to absorb liquid to be measured through the pipeline assembly, transferring the liquid to be measured into the measuring container, and the measuring sensor is used for measuring the liquid absorption amount of the liquid to be measured accommodated in the measuring container.
In one embodiment, the liquid suction amount measuring device further comprises a first switching member and a second switching member, and the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline;
The first end of the first pipeline is connected with the sampling needle, and the second end of the first pipeline is connected with the measuring mechanism;
The first end of the second pipeline is connected with the measuring mechanism, and the second end of the second pipeline is connected with the power assembly;
The first end of the third pipeline is connected with the first end of the first pipeline, and the second end of the third pipeline is connected with the second end of the second pipeline;
The first switching piece is arranged on the first pipeline or the second pipeline and is used for realizing the communication or the disconnection of the first pipeline or the second pipeline;
The second switching piece is arranged on the third pipeline and is used for realizing the communication or the cutting-off of the third pipeline.
In one embodiment, the liquid suction amount measuring device further includes a third switching member, and the line assembly includes a fourth line, a fifth line, and a sixth line;
the third switching piece is connected with the sampling needle, the first end of the fourth pipeline and the first end of the sixth pipeline and is used for realizing the communication or cutting-off of the fourth pipeline and the sixth pipeline;
the second end of the fourth pipeline is connected with the measuring mechanism;
The first end of the fifth pipeline is connected with the measuring mechanism, and the second end of the fifth pipeline is connected with the power assembly;
The second end of the sixth pipeline is connected with the second end of the fifth pipeline.
In one embodiment, the power assembly comprises a travel driver and a power pump, the power pump is connected with the pipeline assembly and used for driving the sampling needle to suck the liquid to be measured through the pipeline assembly, the travel driver is used for driving the sampling needle to be transferred to the opening of the measuring container, and the power pump is also used for driving the sampling needle to discharge the liquid to be measured through the pipeline assembly.
In one embodiment, the measuring sensor includes a gravity sensor, where the gravity sensor is configured to measure an initial weight of the measuring container when the liquid to be measured is not contained therein, and a current weight of the measuring container after the liquid to be measured is contained therein, so as to obtain a unit liquid absorption amount of the sample for the liquid to be measured.
In one embodiment, the calculation formula of the unit liquid absorption amount is as follows:
V=(m2-m1)/(ρ*/n)
In the above formula, V indicates the unit liquid absorption amount, m1 indicates the initial weight, m2 indicates the current weight, ρ indicates the density of the sample, and n indicates the preset times of the sampling needle sucking the liquid to be detected.
In one embodiment, after the current measurement of the liquid amount of the liquid to be measured is completed, the power assembly is further used for driving the sampling needle to suck the cleaning liquid through the pipeline assembly, transferring the cleaning liquid into the measurement container for cleaning and removing waste liquid generated by cleaning, and the gravity sensor is further used for measuring the cleaning weight of the measurement container after cleaning.
In one embodiment, the measurement sensor is a pressure sensor, and the pressure sensor is used for measuring the liquid pressure in the measurement container so as to obtain the liquid absorption amount of the liquid to be measured.
In one embodiment, the measuring sensor is a liquid level sensor, and the liquid level sensor is used for measuring the liquid level of the liquid to be measured in the measuring container so as to obtain the liquid absorption amount of the liquid to be measured.
The utility model provides a sample analyzer, includes detection device and above-mentioned liquid absorption measuring device, power component still is used for through the pipeline subassembly drive the sampling needle absorbs the liquid that awaits measuring, and will the liquid that awaits measuring shifts to detection device, detection device is used for to the liquid that awaits measuring detects the analysis.
The utility model provides a liquid absorption amount measuring device which comprises a sampling mechanism and a measuring mechanism, wherein the sampling mechanism comprises a sampling needle, a pipeline assembly connected with the sampling needle and a power assembly connected with the pipeline assembly, the measuring mechanism comprises a measuring container and a measuring sensor, the power assembly is used for driving the sampling needle to absorb liquid to be measured through the pipeline assembly and transferring the liquid to be measured into the measuring container, and the measuring sensor is used for carrying out liquid absorption amount measurement on the liquid to be measured contained in the measuring container, so that the liquid absorption amount of the sampling needle is obtained.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a schematic diagram showing a liquid suction amount measuring device according to a first embodiment;
FIG. 2 is a schematic diagram showing a liquid suction amount measuring device according to a second embodiment;
FIG. 3 is a schematic view showing a structure of a liquid suction amount measuring device in a third embodiment;
FIG. 4 is a schematic view showing the construction of a liquid suction amount measuring device in a fourth embodiment;
FIG. 5 is a schematic diagram of a sample analyzer;
Reference numerals denote a sample analyzer 001, a liquid suction amount measuring device 100, a sampling mechanism 110, a sampling needle 111, a line assembly 112, a first line 112a, a second line 112b, a third line 112c, a fourth line 112d, a fifth line 112e, a sixth line 112f, a power assembly 113, a stroke driver 113a, a power pump 113b, a measuring mechanism 120, a measuring container 121, a measuring sensor 122, a first switching member 131, a second switching member 132, a third switching member 133, and a detecting device 200.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, apparatus, system, article, or device that comprises a list of steps or elements is not limited to only those steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, apparatus, article, or device.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a liquid suction amount measuring device 100 in a first embodiment, and the liquid suction amount measuring device 100 in this embodiment includes a sampling mechanism 110 and a measuring mechanism 120.
Specifically, the sampling mechanism 110 includes a sampling needle 111, a tube assembly 112 connected to the sampling needle 111, and a power assembly 113 connected to the tube assembly 112, and the measuring mechanism 120 includes a measuring container 121 and a measuring sensor 122.
Where the tubing assembly 112 is a tubing system connecting the sampling needle 111 and the power assembly 113, it may include valves, tubing, and other related components. The power assembly 113 is used for providing suction force for sucking the liquid to be measured and driving force for moving the liquid to be measured, and is specifically used for driving the sampling needle 111 to suck the liquid to be measured through the pipeline assembly 112 in the embodiment, and transferring the liquid to be measured into the measuring container 121. The measurement container 121 is a container for containing a liquid sample to be measured, and the measurement sensor 122 is used for performing liquid suction measurement on the liquid sample to be measured contained in the measurement container 121, thereby obtaining the liquid suction amount of the sampling needle.
As shown in fig. 2, fig. 2 is a schematic structural diagram of a liquid suction amount measurement device 100 in a second embodiment, where the liquid suction amount measurement device 100 in this embodiment further includes a first switching member 131 and a second switching member 132, specifically may be a two-way electromagnetic valve or a pinch valve, and may switch the on/off state of a connecting pipeline. The tubing assembly includes a first tubing 112a, a second tubing 112b, and a third tubing 112c that form a fluid flow path during aspiration and normal measurement.
Specifically, a first end of the first pipeline 112a is connected to the sampling needle 111, a second end of the first pipeline 112a is connected to the measuring mechanism 120, a first end of the second pipeline 112b is connected to the measuring mechanism 120, a second end of the second pipeline 112b is connected to the power unit 113, a first end of the third pipeline 112c is connected to the first end of the first pipeline 112a, and a second end of the third pipeline 112c is connected to the second end of the second pipeline 112 b.
The first switching element 131 is disposed on the first pipeline 112a or the second pipeline 112b for communicating or cutting off the first pipeline 112a or the second pipeline 112b, and the second switching element 132 is disposed on the third pipeline 112c for communicating or cutting off the third pipeline 112 c.
When liquid measurement is required, the first switching member 131 is opened, the second switching member 132 is closed, and suction force is provided by the power assembly 113, so that the liquid to be measured can be ensured to flow into the measurement container 121 from the sampling needle 111 through the first pipeline 112a for liquid absorption measurement, and then flow out from the second pipeline 112b after measurement. During normal sucking operation, the first switching member 131 is closed and the second switching member 132 is opened, so that the liquid to be measured can be ensured to directly flow out from the sampling needle 111 through the third pipeline 112c, and interference of the measuring container 121 is avoided. It can be seen that, in this embodiment, on the premise of correctly switching the switching states of the first switching member 131 and the second switching member 132, the switching of the measurement and normal suction functions can be performed to meet different operation requirements.
As shown in fig. 3, fig. 3 is a schematic structural diagram of a liquid suction amount measurement device 100 in a third embodiment, where the liquid suction amount measurement device 100 in this embodiment further includes a third switching member 133, which may be a three-way electromagnetic valve or a mechanical valve, and may switch the on/off state of the connecting pipeline. The tubing assembly includes a fourth tubing 112d, a fifth tubing 112e, and a sixth tubing 112f, which also form the fluid flow path during aspiration and normal measurement.
Specifically, the third switching element 133 is connected to the sampling needle 111, the first end of the fourth pipeline 112d, and the first end of the sixth pipeline 112f, and is used for implementing communication or disconnection between the fourth pipeline 112d and the sixth pipeline 112f, the second end of the fourth pipeline 112d is connected to the measurement mechanism 120, the first end of the fifth pipeline 112e is connected to the measurement mechanism 120, the second end of the fifth pipeline 112e is connected to the power unit 113, and the second end of the sixth pipeline 112f is connected to the second end of the fifth pipeline 112 e.
Similarly, when liquid measurement is required, the third switching member 133 controls the sampling needle 111 to communicate with the fourth pipeline 112d, and the passage between the sampling needle 111 and the sixth pipeline 112f is cut off, so that suction is provided by the power unit 113, and it is ensured that the liquid to be measured flows from the sampling needle 111 into the measurement container 121 through the fourth pipeline 112d for liquid suction measurement, and then flows out from the fifth pipeline 112e after measurement. During normal sucking operation, the third switching member 133 controls the passage between the sampling needle 111 and the fourth pipe 112d to be cut off, and the sampling needle 111 communicates with the sixth pipe 112f, so that it is ensured that the liquid to be measured directly flows out from the sampling needle 111 through the sixth pipe 112f, and interference of the measuring mechanism 120 is avoided. It can be seen that, in this embodiment, on the premise of correctly switching the on/off state of the third switching member 133, the measurement and normal suction functions can be switched to meet different operation requirements.
As shown in fig. 4, fig. 4 is a schematic structural diagram of a liquid suction amount measuring device 100 in a fourth embodiment, in which a power assembly 113 includes a stroke driver 113a and a power pump 113b, the power pump 113b is connected to a pipeline assembly 112 and is used for driving a sampling needle 111 to suck a liquid to be measured through the pipeline assembly 112, the stroke driver 113a is used for driving the sampling needle 111 to be transferred to an opening of a measuring container 121, and the power pump 113b is also used for driving the sampling needle 111 to discharge the liquid to be measured through the pipeline assembly 112.
Specifically, in position a, the power pump 113b draws a sample from the fluid to be measured through the line assembly 112, and introduces the fluid into the line assembly 112. The sampling needle 111 is controlled by the stroke driver 113a and moved to the position B at the opening of the measurement container 121. At position B, the power pump 113B again acts on the sampling needle 111 through the line assembly 112, but this time acts to discharge the liquid to be measured in the sampling needle 111 into the measurement receptacle 121 via the line assembly 112. By this design, the device can perform operations from drawing the liquid to be measured to discharging it.
In one embodiment, the measuring sensor 122 includes a gravity sensor for measuring an initial weight of the measuring container 121 when the liquid to be measured is not contained therein, and a current weight of the measuring container 121 after the liquid to be measured is contained therein, so as to obtain a unit liquid suction amount of the liquid to be measured by the sampling needle 111.
Further, the calculation formula of the unit liquid absorption amount is as follows:
V=(m2-m1)/(ρ*/n)
In the above, V indicates a unit liquid suction amount, m1 indicates an initial weight, m2 indicates a current weight, ρ indicates a density of a sample, and n indicates a preset number of times the sampling needle 111 suctions the liquid to be measured.
The purpose of this formula is to calculate the unit liquid suction by measuring the initial and current weights, divided by the density and the number of samples. Such a design allows for a more accurate quantification of the amount of liquid drawn each time, facilitating liquid metering and analysis in an experimental or industrial process.
Further, after the current measurement of the liquid amount to be measured is completed, the power assembly 113 is further configured to drive the sampling needle 111 to suck the cleaning liquid through the pipeline assembly 112, transfer the cleaning liquid into the measurement container 121 for cleaning and remove the waste liquid generated during the cleaning, and the gravity sensor is further configured to measure the cleaning weight of the measurement container 121 after the cleaning.
Wherein a cleaning fluid is used to clean any residual sample within the measurement receptacle 121. This helps to avoid cross-contamination between samples, ensuring accuracy of subsequent samples. The cleaning weight, i.e., the net weight of the measurement container 121 after cleaning, ensures that no residue remains in the sample container by comparing the cleaning weight with the initial weight, thereby maintaining the accuracy and reliability of the next sampling.
In one embodiment, the measurement sensor 122 is a pressure sensor, and the pressure sensor is used to measure the pressure of the liquid in the measurement container 121 to obtain the liquid absorption amount of the liquid to be measured. Specifically, the pressure sensor can sense the pressure exerted by the liquid on the container wall, and based on the pressure, the known parameters such as the liquid density and gravity can be used for calculating the liquid absorption amount of the liquid to be detected through a corresponding physical formula.
In one embodiment, the measuring sensor 122 is a liquid level sensor, and the liquid level sensor is used for measuring the liquid level of the liquid to be measured in the measuring container 121 to obtain the liquid absorption amount of the liquid to be measured. In particular, the level sensor may typically detect the position of the liquid surface, thereby determining the level of the liquid. Based on the level, the known shape and cross-sectional area of the container can be used to calculate the liquid suction amount of the liquid to be measured by simple geometric calculation or calibration data provided by the liquid level sensor.
The invention also provides a sample analyzer 001, as shown in fig. 5, the sample analyzer 001 comprises a detection device 200 and a liquid absorption amount measuring device 100, the power assembly 113 is further used for driving the sampling needle 111 to absorb the liquid to be detected through the pipeline assembly 112, transferring the liquid to be detected to the detection device 200, and the detection device 200 is used for detecting and analyzing the liquid to be detected. The detection device 200 may include a sensor, an optical device, an electronic component, or other technical equipment suitable for detection and analysis. The method is used for acquiring data about the properties, components or other relevant information of the liquid to be measured.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A liquid suction amount measuring device, characterized by comprising:
The sampling mechanism comprises a sampling needle, a pipeline assembly connected with the sampling needle and a power assembly connected with the pipeline assembly;
a measuring mechanism comprising a measuring container and a measuring sensor;
the power assembly is used for driving the sampling needle to absorb liquid to be measured through the pipeline assembly, transferring the liquid to be measured into the measuring container, and the measuring sensor is used for measuring the liquid absorption amount of the liquid to be measured accommodated in the measuring container.
2. The fluid intake measurement device of claim 1, further comprising a first switch and a second switch, the tubing assembly comprising a first tubing, a second tubing, and a third tubing;
The first end of the first pipeline is connected with the sampling needle, and the second end of the first pipeline is connected with the measuring mechanism;
The first end of the second pipeline is connected with the measuring mechanism, and the second end of the second pipeline is connected with the power assembly;
The first end of the third pipeline is connected with the first end of the first pipeline, and the second end of the third pipeline is connected with the second end of the second pipeline;
The first switching piece is arranged on the first pipeline or the second pipeline and is used for realizing the communication or the disconnection of the first pipeline or the second pipeline;
The second switching piece is arranged on the third pipeline and is used for realizing the communication or the cutting-off of the third pipeline.
3. The liquid suction amount measuring device according to claim 1, further comprising a third switching member, the line assembly including a fourth line, a fifth line, and a sixth line;
the third switching piece is connected with the sampling needle, the first end of the fourth pipeline and the first end of the sixth pipeline and is used for realizing the communication or cutting-off of the fourth pipeline and the sixth pipeline;
the second end of the fourth pipeline is connected with the measuring mechanism;
The first end of the fifth pipeline is connected with the measuring mechanism, and the second end of the fifth pipeline is connected with the power assembly;
The second end of the sixth pipeline is connected with the second end of the fifth pipeline.
4. The device for measuring the liquid suction amount according to claim 1, wherein the power assembly comprises a stroke driver and a power pump, the power pump is connected with the pipeline assembly and used for driving the sampling needle to suck the liquid to be measured through the pipeline assembly, the stroke driver is used for driving the sampling needle to be transferred to an opening of the measuring container, and the power pump is further used for driving the sampling needle to discharge the liquid to be measured through the pipeline assembly.
5. The liquid suction amount measuring device according to claim 1, wherein the measuring sensor includes a gravity sensor for measuring an initial weight of the measuring container when the liquid to be measured is not contained therein, and a current weight of the measuring container after the liquid to be measured is contained therein, to obtain a unit liquid suction amount of the sample for the liquid to be measured.
6. The liquid suction amount measuring device according to claim 5, wherein the calculation formula of the unit liquid suction amount is:
V=(m2-m1)/(ρ*/n)
In the above formula, V indicates the unit liquid absorption amount, m1 indicates the initial weight, m2 indicates the current weight, ρ indicates the density of the sample, and n indicates the preset times of the sampling needle sucking the liquid to be detected.
7. The liquid suction amount measuring apparatus according to claim 5, wherein the power unit is further configured to drive the sampling needle to suck the cleaning liquid through the pipe unit after completion of the current measurement of the liquid amount of the liquid to be measured, and transfer the cleaning liquid into the measuring container for cleaning and remove the waste liquid generated by the cleaning, and the gravity sensor is further configured to measure the cleaning weight of the measuring container after the cleaning.
8. The liquid suction amount measuring device according to claim 1, wherein the measuring sensor is a pressure sensor for measuring a liquid pressure in the measuring vessel to obtain the liquid suction amount of the liquid to be measured.
9. The liquid suction amount measuring device according to claim 1, wherein the measuring sensor is a liquid level sensor for measuring a liquid level of the liquid to be measured in the measuring container to obtain the liquid suction amount of the liquid to be measured.
10. A sample analyzer comprising a detection device and a liquid suction amount measurement device according to any one of claims 1 to 9, wherein the power assembly is further configured to drive the sampling needle to suck the liquid to be measured through the pipeline assembly, and transfer the liquid to be measured to the detection device, and the detection device is configured to perform detection analysis on the liquid to be measured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420578071.9U CN222671834U (en) | 2024-03-22 | 2024-03-22 | Liquid suction amount measuring device and sample analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420578071.9U CN222671834U (en) | 2024-03-22 | 2024-03-22 | Liquid suction amount measuring device and sample analyzer |
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| CN222671834U true CN222671834U (en) | 2025-03-25 |
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