Liquid dosing device

Abstract

The application discloses a liquid quantitative sampling device which comprises a sampling seat, a sampling element, a first driver and a second driver; the sampling element is movably arranged on the sampling seat, the sampling element is provided with a sampling cavity, and the sampling element can drive the sampling cavity to move between a sampling port and a sampling outlet; when the sampling cavity is communicated with the sampling port, the first driver can drive the pressure in the sampling cavity to be less than the pressure at the sampling port; when the sampling cavity is communicated with the sampling outlet, the second driver can drive the pressure in the sampling cavity to be greater than or equal to the pressure at the sampling outlet; the liquid quantitative sampling device adopts a structural scheme of additionally arranging the second driver to separately control the releasing operation of the to-be-tested liquid, so that the to-be-tested liquid in the sampling cavity is prevented from being affected by the negative pressure back suction of the first driver, the accuracy of the sampling amount is ensured, the sampling element is moved to drive the sampling cavity to reciprocate between the sampling port and the sampling outlet, the purpose of multiple times of moving and taking the to-be-tested liquid is achieved, the requirement of multiple times of detection is met, and the adaptability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling apparatus, in particular to a liquid quantitative sampling device. BACKGROUND

[0002] In the detection of liquid samples, sampling devices such as micro-samplers are needed to take liquid samples from the liquid to be detected for the purpose of detection, wherein the liquid sample includes blood, urine, saliva, body fluid, environmental water sample, drinking water, etc.

[0003] In the traditional medical field, in the actual operation of sampling and detecting the blood of patients by using a common simple micro-sampler, due to the viscosity of blood and the blood pressure of the human body, it is required that the inner cavity of the syringe of the micro-sampler is under negative pressure relative to the atmospheric pressure when sampling, so as to perform the sampling operation. This makes the air pressure at the needle port push the liquid sample back into the syringe when the sample is discharged, which easily leads to inaccurate sampling amount. At the same time, a micro-sampler can only take a sample once, while multiple sampling is often required in clinical practice for the detection of multiple markers for combined diagnosis of diseases, which makes the adaptability of the traditional micro-sampler not high. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a liquid quantitative sampling device to solve the technical problems mentioned in the background art, i.e., the sampling amount of the existing liquid sampling device is not accurate, and only single sampling can be performed, which makes the adaptability not high.

[0005] The technical solution adopted by the present application to solve the problems is as follows:

[0006] A liquid quantitative sampling device, comprising a sampling seat, a sampling member, a first driver and a second driver, the sampling seat having a sampling port for sucking the liquid to be detected and a sample outlet for releasing the liquid to be detected; the sampling member is movably installed in the sampling seat, and the sampling member is provided with a sampling cavity for storing the liquid to be detected, and the sampling member is configured to drive the sampling cavity to move between the sampling port and the sample outlet; the first driver is configured to at least drive the pressure in the sampling cavity to be lower than the pressure at the sampling port when the sampling cavity is connected to the sampling port; the second driver is configured to at least drive the pressure in the sampling cavity to be greater than or equal to the pressure at the sample outlet when the sampling cavity is connected to the sample outlet.

[0007] The liquid quantitative sampling device disclosed in the application adopts the structure scheme of adding a second driver to separately control the release operation of the liquid to be measured, which avoids the influence of the negative pressure backflow of the first driver on the liquid to be measured in the sampling cavity before the liquid to be measured is released, ensures the accuracy of the sampling amount in the sampling cavity, and simultaneously movably installs the sampling element in the sampling seat, moves the sampling element to drive the sampling cavity to reciprocate between the sampling port and the sample outlet, and combines the negative pressure suction of the first driver and the positive pressure pushing of the second driver, so that the purpose of multiple removal of the liquid to be measured is achieved, the demand of multiple detection is met, and the adaptability is improved.

[0008] Further, the first driver includes a syringe installed in the sampling seat, and the sampling port is correspondingly arranged with the syringe; when the sampling cavity is communicated with the sampling port, the syringe is communicated with the sampling cavity.

[0009] Further, the second driver includes a rubber balloon installed in the sampling seat, and the sample outlet is correspondingly arranged with the rubber balloon; when the sampling cavity is communicated with the sample outlet, the rubber balloon is communicated with the sampling cavity.

[0010] Further, the sampling seat is provided with a movable cavity, the sampling element is matched with the cavity of the movable cavity, and the sampling element is movably installed in the movable cavity.

[0011] Further, the sampling element is a cubic structure, the sampling element is slidably arranged in the movable cavity; the sampling port and the first driver are respectively located at two ends of the sampling seat perpendicular to the sliding direction of the sampling element, the sample outlet and the second driver are respectively located at two ends of the sampling seat perpendicular to the sliding direction of the sampling element, and the sample outlet and the sampling port are located on the same side of the sampling seat; the sampling cavity penetrates the body of the sampling element, and the sampling cavity is arranged perpendicular to the sliding direction of the sampling element in the movable cavity.

[0012] Further, a plurality of sampling cavities are arranged on the sampling element in a spaced manner, and the distance between any two adjacent sampling cavities is equal to the distance between the sampling port and the sample outlet along the sliding direction of the sampling element.

[0013] Further, a detection card is detachably installed on the sampling seat, and the detection card is correspondingly arranged with the sample outlet.

[0014] Further, the sampling element is a cylindrical structure, and the sampling element is rotatably arranged in the movable cavity.

[0015] Further, the sampling seat comprises a sleeve and a top cover matched with the sleeve, the sampling member is rotatably installed between the sleeve and the top cover, the sampling port and the sample outlet are arranged at the bottom of the sleeve, the first driver and the second driver are arranged at the top of the top cover, the top of the sleeve is provided with a reverse buckle, the top cover is provided with a card hole corresponding to the reverse buckle, and when the top cover is assembled on the top of the sleeve, the reverse buckle is located in the card hole.

[0016] Further, the sampling port, the sample outlet, the first driver and the second driver are arranged on the side wall of the sampling seat, the sampling member has a hollow cavity arranged in the axial direction, the two ends of the sampling member are provided with end covers, and the cavity between the two end covers forms the sampling cavity, the side wall of the sampling member is provided with a suction port and a driving port, the suction port and the driving port penetrate the side wall of the sampling member and communicate with the sampling cavity, the sampling port and the sample outlet are located in the rotation range of the suction port, and the first driver and the second driver are arranged in the rotation range of the driving port.

[0017] In summary, the liquid quantitative sampling device provided by the application has the following technical effects:

[0018] 1) The liquid quantitative sampling device, by adding a second driver to separately control the release operation of the measured liquid, avoids the influence of the negative pressure backflow of the first driver on the measured liquid in the sampling cavity before the measured liquid is released, to ensure the accuracy of the sampling amount in the sampling cavity.

[0019] 2) The liquid quantitative sampling device drives the sampling cavity to make reciprocating motion between the sampling port and the sample outlet, and combines the negative pressure suction of the first driver and the positive pressure pushing of the second driver, so as to realize the purpose of multiple removal of the measured liquid, to meet the demand of multiple detection, and to improve the adaptability.

[0020] 3) The second driver adopts the structure of a rubber balloon, which can also avoid the problem of ejection of the measured liquid during sampling, to further improve the detection accuracy.

[0021] 4) By arranging a plurality of parallel and spaced sampling cavities, the purpose of rapid pipetting for joint detection can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an overall structural schematic view of the liquid quantitative sampling device of the first embodiment of the application.

[0023] Figure 2 It is an exploded view from the first perspective. Figure 1

[0024] ​Figure 3 is an exploded schematic view of the liquid quantitative sampling device under a second perspective; Figure 1

[0025] Figure 4 is an exploded schematic view of the liquid quantitative sampling device under a third perspective; Figure 1

[0026] Figure 5 is a schematic view of the overall structure of the liquid quantitative sampling device according to Embodiment Two;

[0027] Figure 6 is an exploded schematic view of the liquid quantitative sampling device according to Embodiment Two; Figure 5

[0028] Figure 7 is a schematic view of the overall structure of the liquid quantitative sampling device according to Embodiment Three;

[0029] Figure 8 is an exploded schematic view of the liquid quantitative sampling device according to Embodiment Three; Figure 7

[0030] Figure 9 is a schematic view of the sampling member under a first perspective according to Embodiment Three;

[0031] Figure 10 is a schematic view of the sampling member under a second perspective according to Embodiment Three;

[0032] Figure 11 is a schematic view of the sampling member under a third perspective according to Embodiment Three.

[0033] In the drawings, the reference signs have the following meanings:

[0034] 1, sampling seat; 2, sampling port; 3, sampling outlet; 4, sampling member; 5, sampling cavity; 6, syringe; 7, rubber balloon; 8, movable cavity; 9, detection card; 10, sleeve; 11, top cover; 12, reverse buckle; 13, bayonet; 14, end cover; 15, suction port; 16, driving port; 17, moving block; 18, positioning strip; 19, positioning card slot; 20, anti-reverse luer connector; 21, movable hole position. DETAILED DESCRIPTION

[0035] In order to better understand and implement, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0036] ​​​​In the description of the application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] Example One

[0039] Reference Figures 1 to 4The embodiment discloses a liquid quantitative sampling device, which comprises a sampling seat 1, a sampling piece 4, a first driver and a second driver, the sampling seat 1 is provided with a sampling port 2 for sucking the liquid to be measured and a sampling outlet 3 for releasing the liquid to be measured; the sampling piece 4 is movably arranged in the sampling seat 1, the sampling piece 4 is provided with a sampling cavity 5 for storing the liquid to be measured, and the sampling piece 4 is configured to drive the sampling cavity 5 to move between the sampling port 2 and the sampling outlet 3; the first driver is configured to at least drive the pressure in the sampling cavity 5 to be lower than the pressure at the sampling port 2 to negative pressure when the sampling cavity 5 is communicated with the sampling port 2, that is, the first driver is configured to at least drive the pressure in the sampling cavity 5 to be lower than the pressure at the sampling port 2 when the sampling cavity 5 is communicated with the sampling port 2, so that the first driver can realize the purpose of sucking the liquid to be measured into the sampling cavity 5 through the sampling port 2; the second driver is configured to at least drive the pressure in the sampling cavity 5 to be greater than or equal to the pressure at the sampling outlet 3 when the sampling cavity 5 is communicated with the sampling outlet 3, and when the release operation of the liquid to be measured is required, the pressure in the sampling cavity 5 is only required to be greater than the pressure at the sampling outlet 3 through the second driver to realize the purpose of pushing the liquid to be measured in the sampling cavity 5 out of the sampling outlet 3, and then the purpose of releasing the liquid to be measured is achieved, wherein before the release operation, the pressure in the sampling cavity 5 can be equal to the pressure at the sampling outlet 3 through the second driver, so that the problem that the liquid to be measured in the sampling cavity 5 flows to the outside of the sampling cavity 5 due to the back-pumping effect of the negative pressure can be avoided, so that enough liquid to be measured can be stored in the sampling cavity 5 when the release operation of the liquid to be measured is performed, so as to ensure the accuracy of the sampling amount, that is, by adopting the structure scheme of adding the second driver to separately control the release operation of the liquid to be measured, the liquid to be measured in the sampling cavity 5 is prevented from being affected by the negative pressure back-pumping of the first driver before the liquid to be measured is released, so as to ensure the accuracy of the sampling amount in the sampling cavity 5, and in actual application, the cavity volume of the sampling cavity 5 can be standardized designed according to the traditional habit or sampling standard of the corresponding industry, so that the purpose of accurate quantitative sampling can be achieved.

[0040] The liquid quantitative sampling device disclosed in the embodiment comprises a sampling seat 1, a sampling member 4 movably arranged in the sampling seat 1, a first driver and a second driver, and a sampling cavity 5 arranged in the sampling member 4. When sampling is needed, the sampling member 4 is driven to move on the sampling seat 1. When the sampling cavity 5 is connected with the sampling port 2, the first driver is started to form negative pressure to extract the liquid to be measured, so that the sampling cavity 5 stores the liquid to be measured. Then, the sampling member 4 is driven to move the sampling cavity 5 to be connected with the discharging port 3. Then, the second driver is started. In this way, the liquid to be measured can be discharged through the discharging port 5. Through the reciprocating movement of the sampling cavity 5 between the sampling port 2 and the discharging port 3, and the combination of the negative pressure suction of the first driver and the positive pressure pushing of the second driver, the liquid to be measured can be extracted multiple times, so as to meet the requirement of multiple detections and improve the adaptability.

[0041] Preferably, referring to Figure 1 and Figure 2 , the first driver comprises a syringe 6 arranged on the sampling seat 1, and the sampling port 2 is arranged in correspondence with the syringe 6. When the sampling cavity 5 is connected with the sampling port 2, the syringe 6 is connected with the sampling cavity 5. Specifically, the injection port of the syringe 6 is connected with the sampling cavity 5. That is, when one end of the sampling cavity 5 is connected with the sampling port 2, the other end of the sampling cavity 5 is connected with the injection port of the syringe 6. When the sampling cavity 5 is separated from the sampling port 2, the first driver is separated from the sampling cavity 5. The syringe 6 is convenient to obtain. When the liquid to be measured is extracted, the piston rod in the syringe 6 is pulled away from the sampling member 4, so that negative pressure is generated in the syringe 6. Since the syringe 6 is connected with the sampling cavity 5, the liquid to be measured can be extracted. In other embodiments, the first driver can also comprise a balloon, a vacuum pump or other devices capable of generating negative pressure.

[0042] Preferably, referring to the figure, the second driver comprises a rubber balloon 7 arranged on the sampling seat 1, and the sampling outlet 3 is arranged in correspondence with the rubber balloon 7; when the sampling cavity 5 is communicated with the sampling outlet 3, the rubber balloon 7 is communicated with the sampling cavity 5, that is, when one end of the sampling cavity 5 is communicated with the sampling outlet 3, the other end of the sampling cavity 5 is communicated with the rubber balloon 7; after the sampling operation of the to-be-tested liquid is completed, the sampling member 4 is moved to drive the sampling cavity 5 storing the to-be-tested liquid to move in the direction of communicating with the sampling outlet 3; in this process, the sampling cavity 5 is separated from the syringe 6, and the sampling cavity 5 will not be affected by negative pressure, and the to-be-tested liquid in the sampling cavity 5 will not be sucked back into the syringe 6; when the sampling cavity 5 moves to communicate with the sampling outlet 3, the rubber balloon 7 is also communicated with the sampling cavity 5; since the pressure in the rubber balloon 7 is equal to the atmospheric pressure before the rubber balloon 7 is squeezed, that is, equal to the pressure at the sampling outlet 3, in this way, the sampling cavity 5 will not be affected by negative pressure during the movement of the sampling cavity 5 to communicate with the sampling outlet 3 and the rubber balloon 7, so that the to-be-tested liquid in the sampling cavity 5 will not flow in the reverse direction due to pressure imbalance, thereby ensuring that the sampling cavity 5 stores a sufficient amount of to-be-tested liquid, and the precision of the sampling amount is ensured; when sampling, the rubber balloon 7 is only squeezed to generate positive pressure in the rubber balloon 7 to push the to-be-tested liquid in the sampling cavity 5 to flow out of the sampling outlet 3, thereby completing the sampling operation of the to-be-tested liquid. In addition, it should be briefly pointed out that in actual application, the sampling amount in a single detection is generally low, and therefore the sampling cavity 5 is designed to be a fine cavity structure, which makes the surface tension between the to-be-tested liquid and the inner side wall of the sampling cavity 5 generally offset the flowability caused by the gravity of the to-be-tested liquid during the movement of the sampling member 4, so that the to-be-tested liquid in the sampling cavity 5 will not flow in the forward direction (toward the sampling outlet 3) or in the reverse direction (away from the sampling outlet 3) during the movement of the sampling cavity 5.

[0043] In other embodiments, the second driver can also be a syringe, a pressure pump or other devices capable of generating positive pressure.

[0044] Of course, in other embodiments, if the second driver adopts a syringe structure, the volume of the inner cavity of the syringe will change greatly when the piston rod is pushed or pulled, and the pressure change will be large, so that the to-be-tested liquid is easily ejected during sampling, affecting the detection of the to-be-tested liquid; compared with the syringe, the degree of squeezing of the rubber balloon 7 is relatively well controlled, so that the pressure change generated by the rubber balloon 7 when the rubber balloon 7 is squeezed is relatively small, and therefore, in the embodiment, the second driver adopts the structure of the rubber balloon 7, which can also avoid the ejection of the to-be-tested liquid during sampling, further improving the detection precision.

[0045] Specifically, the sampling seat 1 is provided with a movable cavity 8, the sampling member 4 is matched with the cavity of the movable cavity 8, and the sampling member 4 is movably arranged in the movable cavity 8.

[0046] Preferably, referring to Figure 2 and Figure 3 , the sampling member 4 is a cuboid structure, and the sampling member 4 is slidingly arranged in the movable cavity 8. Only the movement block 17 of the sampling member 4 needs to be pushed and pulled to achieve the purpose of moving the sampling cavity 5 in the sampling member 4, and then the sampling cavity 5 can move between the sampling port 2 and the sample outlet 3.

[0047] The sampling port 2 and the first driver are located at two ends of the sampling seat 1 perpendicular to the sliding direction of the sampling member 4. In this way, when the sampling cavity 5 is connected to the sampling port 2, the first driver and the sampling port 2 are located at two ends of the sampling cavity 5. Therefore, when sampling, only a certain amount of liquid to be tested is drawn into the syringe 6, so that the sampling cavity 5 can be completely filled with the liquid to be tested, thereby ensuring the sampling amount during detection. The sample outlet 3 and the second driver are located at two ends of the sampling seat 1 perpendicular to the sliding direction of the sampling member 4, and the sample outlet 3 and the sampling port 2 are located on the same side of the sampling seat 1. In this way, the first driver and the second driver are located on the same side, which is beneficial for sample discharge operation.

[0048] The sampling cavity 5 penetrates the body of the sampling member 4, and the sampling cavity 5 is arranged perpendicular to the sliding direction of the sampling member 4 in the movable cavity 8. The structure scheme that the sampling cavity 5 penetrates the body of the sampling member 4 can ensure that the sampling cavity 5 can stably connect the sampling port 2 and the first driver, and can stably connect the sample outlet 3 and the second driver. At the same time, since the cavity of the movable cavity 8 is matched with the shape of the sampling member 4, during the movement of the sampling member 4, the side wall of the movable cavity 8 in contact with the port of the sampling cavity 5 can temporarily block the port of the sampling cavity 5, thereby avoiding the leakage of the sampling amount during pipetting and improving the functional stability of the product.

[0049] Preferably, referring to Figure 3 , a plurality of sampling cavities 5 are arranged on the sampling member 4, and the distance between any two adjacent sampling cavities 5 is equal to the distance between the sampling port 2 and the sample outlet 3 along the sliding direction of the sampling member 4. In this way, when the sampling cavity 5 at the relatively intermediate position is connected to one of the sampling port 2 and the sample outlet 3, at least one of the two sampling cavities 5 adjacent to the sampling cavity 5 is connected. By arranging a plurality of parallel and spaced sampling cavities 5, rapid pipetting for joint detection can be achieved.

[0050] Preferably, referring to Figure 1 and Figure 4The sampling seat 1 is detachably provided with a detection card 9, and the detection card 9 is arranged in correspondence with the sampling outlet 3, so as to facilitate rapid detection.

[0051] The sampling member 4 is provided with a positioning strip 18, and the movable cavity 8 is provided with a positioning card slot 19 capable of cooperating with the positioning strip 18. When the sampling cavity 5 is connected to the sampling outlet 2 or the sampling outlet 3, the positioning strip 18 is located in the positioning card slot 19, so as to achieve the limiting effect, and facilitate the sampling cavity 5 to align with the sampling outlet 2 or the sampling outlet 3.

[0052] Specifically, the sampling port 2 is detachably provided with a reverse prevention luer joint 20. Through the reverse prevention luer joint 20, it can be applied to the medical field, and the reverse prevention luer joint 20 has a reverse prevention valve, which can prevent the measured liquid from flowing out of the sampling port 2.

[0053] In summary, the liquid quantitative sampling device disclosed in the embodiment can bring the following beneficial effects:

[0054] 1) The liquid quantitative sampling device adopts the structure scheme of adding a second driver to separately control the release operation of the measured liquid, which can avoid the influence of the negative pressure backflow of the first driver on the measured liquid in the sampling cavity before the measured liquid is released, so as to ensure the accuracy of the sampling amount in the sampling cavity;

[0055] 2) The liquid quantitative sampling device drives the sampling cavity to make reciprocating motion between the sampling port and the sampling outlet, and combines the negative pressure suction of the first driver and the positive pressure pushing of the second driver, so as to realize the purpose of multiple removal of the measured liquid, meet the demand of multiple detection, and improve the adaptability;

[0056] 3) The second driver adopts the structure of a rubber balloon, which can also avoid the problem of ejection of the measured liquid during sampling, so as to further improve the detection accuracy;

[0057] 4) By arranging a plurality of parallel and spaced sampling cavities, the purpose of rapid pipetting for joint detection can be achieved.

[0058] Embodiment two

[0059] Among them, for the specific structure of the sampling seat 1 and the sampling member 4, in addition to the cubic structure mentioned in embodiment 1, the cylindrical structure in this embodiment can also be used, that is, referring to Figures 6 to 7 The sampling member 4 is a cylindrical structure, and the sampling member 4 is rotationally arranged in the movable cavity 8. By rotating the sampling member 4, the purpose of moving the sampling cavity 5 can also be achieved.

[0060] Preferably, referring to Figure 5 and Figure 6, the sampling seat 1 comprises a sleeve 10 and a top cover 11 matched with the sleeve 10, the sampling member 4 is rotatably installed between the sleeve 10 and the top cover 11, the sampling cavity 5 is arranged along the direction parallel to the axis of the sampling member 4; the sampling port 2 and the sample outlet 3 are arranged at the bottom of the sleeve 10, and the sampling port 2 and the sample outlet 3 are both located in the movement range of the bottom end of the sampling cavity 5, that is, the sampling port 2 and the sample outlet 3 are both located in the rotating radius of the sampling cavity 5; the first driver and the second driver are arranged at the top of the top cover 11, and the first driver and the second driver are both located in the movement range of the top end of the sampling cavity 5, that is, the first driver and the second driver are both located in the rotating radius of the sampling cavity 5; the top of the sleeve 10 is provided with an inverted buckle 12, and the top cover 11 is provided with a card hole 13 corresponding to the inverted buckle 12, when the top cover 11 is assembled on the top of the sleeve 10, the inverted buckle 12 is located in the card hole 13, through the structure of buckling, the structure is simple, and meanwhile, the sleeve 10 and the top cover 11 can be conveniently buckled and installed.

[0061] Wherein, the side wall of the sampling seat 1 is provided with a movable hole position 21, and the outer wall of the sampling member 4 is formed with a moving block 17, when the sampling cavity 5 moves between the sampling port 2 and the sample outlet 3, the moving block 17 moves in the movable hole position 22, in this way, by rotating the moving block 17, the sampling member 4 can be rotated to drive the sampling cavity 5 to move.

[0062] Example three

[0063] In addition, for the sampling seat 1 of the cylindrical structure, the sampling port, the sample outlet, the first driver and the second driver can be arranged on the side wall of the cylindrical structure in addition to being arranged at the two ends of the cylindrical structure, that is, referring to Figures 7 to 11 , the sampling port 2, the sample outlet 3, the first driver and the second driver are all arranged on the side wall of the sampling seat 1; the sampling member 4 has a hollow cavity arranged in the axial direction, both ends of the sampling member 4 are provided with end covers 14, and the cavity between the two end covers 14 forms the sampling cavity 5; the hollow cavity penetrates through the sampling member 4 to meet the design requirement of the structure opening, and the end part of the hollow cavity is closed by the end cover 14 to meet the structural requirement of forming the sampling cavity 5; the side wall of the sampling member 4 is provided with a suction port 15 and a driving port 16, the suction port 15 and the driving port 16 both penetrate through the side wall of the sampling member 4 and communicate with the sampling cavity 5; the sampling port 2 and the sample outlet 3 are both located in the rotating range of the suction port 15; the first driver and the second driver are both arranged in the rotating range of the driving port 16, in this way, the sampling port, the sample outlet, the first driver and the second driver can be arranged on the side wall of the sampling seat 1.

[0064] The technical means disclosed in the present application are not limited to the technical means disclosed in the above embodiments, and include technical solutions composed of any combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the scope of protection of the present application.

Claims

1. A liquid dosing sampling device, characterized in that, The application relates to a sampling device, which comprises the following parts: a sampling seat (1) with a sampling port (2) for sucking a liquid to be tested and a sample outlet (3) for releasing the liquid to be tested; a sampling element (4) movably arranged in the sampling seat (1), wherein a sampling cavity (5) for storing the liquid to be tested is arranged in the sampling element (4), and the sampling element (4) is configured to drive the sampling cavity (5) to move between the sampling port (2) and the sample outlet (3); a first driver configured to at least reduce the pressure in the sampling cavity (5) to negative pressure relative to the pressure at the sampling port (2) when the sampling cavity (5) is communicated with the sampling port (2); and a second driver configured to at least increase the pressure in the sampling cavity (5) to be greater than or equal to the pressure at the sample outlet (3) when the sampling cavity (5) is communicated with the sample outlet (3). The first driver comprises a syringe (6) arranged in the sampling seat (1), and the sampling port (2) is correspondingly arranged with the syringe (6).

2. The liquid quantitative sampling device according to claim 1, characterized in that, When the sampling cavity (5) is communicated with the sampling port (2), the syringe (6) is communicated with the sampling cavity (5). The second driver comprises a rubber balloon (7) arranged in the sampling seat (1), and the sample outlet (3) is correspondingly arranged with the rubber balloon (7).

3. The liquid quantitative sampling device according to claim 1, characterized in that, When the sampling cavity (5) is communicated with the sample outlet (3), the rubber balloon (7) is communicated with the sampling cavity (5). The sampling seat (1) is provided with a movable cavity (8), the sampling element (4) is matched with the cavity of the movable cavity (8), and the sampling element (4) is movably arranged in the movable cavity (8).

4. The liquid quantitative sampling device according to claim 1 or 2 or 3, characterized in that, The sampling element (4) is a cubic structure, and the sampling element (4) is slidingly arranged in the movable cavity (8).

5. The liquid quantitative sampling device according to claim 4, characterized in that, The sampling port (2) and the first driver are respectively located at two ends of the sampling seat (1) perpendicular to the sliding direction of the sampling element (4), the sample outlet (3) and the second driver are respectively located at two ends of the sampling seat (1) perpendicular to the sliding direction of the sampling element (4), and the sample outlet (3) and the sampling port (2) are located on the same side of the sampling seat (1). The sampling cavity (5) penetrates the body of the sampling element (4), and the sampling cavity (5) is arranged perpendicular to the sliding direction of the sampling element (4) in the movable cavity (8). A plurality of sampling cavities (5) are arranged on the sampling element (4) in a spaced manner, and the distance between any two adjacent sampling cavities (5) is equal to the distance between the sampling port (2) and the sample outlet (3) along the sliding direction of the sampling element (4).

6. The liquid quantitative sampling device according to claim 5, characterized in that, A detection card (9) is detachably arranged on the sampling seat (1), and the detection card (9) is correspondingly arranged with the sample outlet (3).

7. The liquid quantitative sampling device according to claim 5 or 6, characterized in that, The sampling element (4) is a cylindrical structure, and the sampling element (4) is rotationally arranged in the movable cavity (8).

8. The liquid quantitative sampling device according to claim 4, characterized in that, ​ 9. The liquid quantitative sampling device according to claim 8, characterized in that, The sampling seat (1) comprises a sleeve (10) and a cover (11) matched with the sleeve (10), and the sampling member (4) is rotatably installed between the sleeve (10) and the cover (11); The sampling port (2) and the sample outlet (3) are arranged at the bottom of the sleeve (10), and the first driver and the second driver are arranged at the top of the cover (11); The top of the sleeve (10) is provided with a reverse buckle (12), and the cover (11) is provided with a card hole (13) corresponding to the reverse buckle (12), when the cover (11) is assembled on the top of the sleeve (10), the reverse buckle (12) is located in the card hole (13).

10. The liquid quantitative sampling device according to claim 8, characterized in that, The sampling port (2), the sample outlet (3), the first driver and the second driver are all arranged on the side wall of the sampling seat (1); The sampling member (4) has a hollow cavity arranged in the axial direction, and the two ends of the sampling member (4) are provided with end covers (14), and the cavity between the two end covers (14) forms the sampling cavity (5); The side wall of the sampling member (4) is provided with a suction port (15) and a driving port (16), the suction port (15) and the driving port (16) both penetrate the side wall of the sampling member (4) and communicate with the sampling cavity (5); The sampling port (2) and the sample outlet (3) are located in the rotation range of the suction port (15); The first driver and the second driver are both arranged in the rotation range of the driving port (16).

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