CN219109532U - Liquid quantitative sampling device - Google Patents

Abstract

The utility model discloses a liquid quantitative sampling device, which comprises a sampling seat, a sampling piece, a first driver and a second driver, wherein the sampling seat is provided with a first driving device and a second driving device; the sampling piece is movably arranged on the sampling seat, a sampling cavity is arranged in the sampling piece, and the sampling piece can drive the sampling cavity to move between the sampling port and the sampling outlet; the first driver can drive the pressure in the sampling cavity to be smaller than the pressure at the sampling port when the sampling cavity is communicated with the sampling port; when the sampling cavity is communicated with the sample outlet, the second driver can drive the pressure in the inner cavity of the sampling cavity to be greater than or equal to the pressure at the sample outlet; the liquid quantitative sampling device adopts a structural scheme that a second driver is additionally arranged to independently control the release operation of the liquid to be tested, so that the liquid to be tested in a sampling cavity is prevented from being influenced by negative pressure back-pumping of the first driver, and the accuracy of the sampling quantity is ensured; through removing the sample piece with order about the sample chamber and do reciprocating motion between sample connection and play appearance mouth to realize removing the liquid purpose that awaits measuring many times, satisfy the demand of multitime detection, improve adaptability.

Description

Liquid quantitative sampling device

Technical Field

The utility model relates to the technical field of sampling instruments, in particular to a liquid quantitative sampling device.

Background

When detecting a liquid sample, a sampling device, such as a microsyringe, is needed to achieve the purpose of taking the liquid sample from the liquid to be detected for detection, wherein the liquid sample comprises blood, urine, saliva, body fluid, environmental water sample, drinking water and the like.

In the traditional medical field, in the actual operation of sampling and detecting blood of a patient by adopting a common simple microsyringe, due to the viscosity of the blood and human blood pressure factors, the sampling operation can be carried out only when the inner cavity of the syringe of the microsyringe is required to be negative pressure relative to the atmospheric pressure during sampling, so that when the sample is discharged, the liquid sample can be pushed into the syringe by the air pressure at the position of the sample discharge needle opening due to the atmospheric pressure communicated with the needle opening, the sampling amount is easy to be inaccurate, meanwhile, one microsyringe can only sample once at a time, and multiple times of sampling are often required clinically to be used for joint diagnosis of a plurality of markers, so that the adaptability of the traditional microsyringe is not high.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a liquid quantitative sampling device so as to solve the following technical problems in the background art: the sampling amount of the existing liquid sampling device is inaccurate, and only a single sampling can be carried out, so that the technical problem of low adaptability is solved.

The utility model adopts the technical proposal for solving the problems that:

the liquid quantitative sampling device comprises a sampling seat, a sampling piece, a first driver and a second driver, wherein the sampling seat is provided with a sampling port for sucking liquid to be tested and a sampling outlet for releasing the liquid to be tested; the sampling piece is movably arranged on the sampling seat, a sampling cavity for storing liquid to be tested is arranged in the sampling piece, and the sampling piece is configured to drive the sampling cavity to move between the sampling port and the sampling outlet; the first driver is configured to at least drive the pressure in the sampling cavity to be reduced to negative pressure relative to the pressure at the sampling port when the sampling cavity is communicated with the sampling port; the second driver is configured to at least drive a pressure in the sampling cavity lumen greater than or equal to a pressure at the sample outlet when the sampling cavity communicates with the sample outlet.

The liquid quantitative sampling device disclosed by the utility model adopts a structural scheme that the second driver is additionally arranged to independently control the release operation of the liquid to be tested, plays a role in preventing the liquid to be tested in the sampling cavity from being influenced by the negative pressure back suction of the first driver before releasing the liquid to be tested, so as to ensure the accuracy of the sampling quantity in the sampling cavity, meanwhile, the sampling piece is movably arranged in the sampling seat, the sampling cavity is driven to reciprocate between the sampling port and the sampling outlet by utilizing the movable sampling piece, and the purpose of moving the liquid to be tested for multiple times can be realized by combining the negative pressure suction effect of the first driver and the positive pressure pushing effect of the second driver, so that the requirement of multiple times of detection is met, and the adaptability is improved.

Further, the first driver comprises a syringe installed on the sampling seat, and the sampling port and the syringe are correspondingly arranged; when the sampling cavity is communicated with the sampling port, the injection cylinder is communicated with the sampling cavity.

Further, the second driver comprises a rubber balloon arranged on the sampling seat, and the sample outlet and the rubber balloon are correspondingly arranged; when the sampling cavity is communicated with the sample outlet, the rubber balloon is communicated with the sampling cavity.

Furthermore, the sampling seat is provided with a movable cavity, the sampling piece is matched with the cavity of the movable cavity, and the sampling piece is movably arranged in the movable cavity.

Further, the sampling piece is of a cube structure and is arranged in the movable cavity in a sliding manner; the sampling port and the first driver are respectively positioned at two ends of the sampling seat, which are perpendicular to the sliding direction of the sampling piece, the sample outlet and the second driver are respectively positioned at two ends of the sampling seat, which are perpendicular to the sliding direction of the sampling piece, and the sample outlet and the sampling port are positioned at the same side of the sampling seat; the sampling cavity penetrates through the body of the sampling piece, and is perpendicular to the sliding direction of the sampling piece in the movable cavity.

Further, the sampling cavity is provided with a plurality of, a plurality of sampling cavities are arranged on the sampling piece at intervals, and the distance between any two adjacent sampling cavities is equal to the distance between the sampling port and the sampling outlet along the sliding direction of the sampling piece.

Further, the sampling seat is detachably provided with a detection card, and the detection card and the sample outlet are correspondingly arranged.

Further, the sampling piece is of a cylindrical structure, and the sampling piece is rotatably arranged in the movable cavity.

Further, the sampling seat comprises a sleeve and a top cover matched with the sleeve, and the sampling piece is rotatably arranged between the sleeve and the top cover; the sampling port and the sample outlet are arranged at the bottom of the sleeve, and 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 back-off, the top cover is provided with a bayonet corresponding to the back-off, and when the top cover is assembled on the top of the sleeve, the back-off is positioned in the bayonet.

Further, the sampling port, the sample outlet, the first driver and the second driver are all arranged on the side wall of the sampling seat; the sampling piece is provided with a hollow cavity arranged along the axial direction, the two ends of the sampling piece are respectively provided with an end cover, and the hollow cavity between the two end covers forms the sampling cavity; the side wall of the sampling piece is provided with a suction opening and a driving opening, and the suction opening and the driving opening penetrate through the side wall of the sampling piece and are communicated with the sampling cavity; the sampling port and the sample outlet are positioned in the rotation range of the suction port; the first driver and the second driver are both arranged in the rotation range of the driving port.

In summary, the liquid quantitative sampling device provided by the utility model has the following technical effects:

1) According to the liquid quantitative sampling device, the structure scheme that the second driver is additionally arranged to independently control the release operation of the liquid to be tested is adopted, so that the effect that the liquid to be tested in the sampling cavity is prevented from being influenced by negative pressure back suction of the first driver before the liquid to be tested is released is achieved, and the accuracy of the sampling quantity in the sampling cavity is ensured;

2) The liquid quantitative sampling device can realize the purpose of taking liquid to be tested for multiple times by driving the sampling cavity to reciprocate between the sampling port and the sampling outlet and combining the negative pressure suction effect of the first driver and the positive pressure pushing effect of the second driver so as to meet the requirement of multiple times of detection and improve the adaptability;

3) The second driver adopts the structural form of the rubber saccule, and can also play a role in avoiding the problem of spraying the liquid to be detected during sample discharge so as to further improve the detection accuracy;

4) Through setting up a plurality of sampling chambers of arranging in parallel at intervals, can realize quick pipetting in order to carry out the purpose of joint detection.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a liquid quantitative sampling device according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1 at a first view angle;

FIG. 3 is an exploded view of FIG. 1 at a second view angle;

FIG. 4 is an exploded view of FIG. 1 at a third view angle;

FIG. 5 is a schematic diagram of the overall structure of a liquid quantitative sampling device according to the second embodiment;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a schematic view showing the overall structure of a liquid quantitative sampling device according to a third embodiment;

FIG. 8 is an exploded view of FIG. 7;

FIG. 9 is a schematic structural view of the sample member at a first view angle in the third embodiment;

FIG. 10 is a schematic structural view of the sample member at a second view angle in the third embodiment;

fig. 11 is a schematic structural view of the sample piece at a third view angle in the third embodiment.

Wherein the reference numerals have the following meanings:

1. a sampling seat; 2. a sampling port; 3. a sample outlet; 4. sampling a sample piece; 5. a sampling cavity; 6. a syringe; 7. a rubber balloon; 8. a movable cavity; 9. a detection card; 10. a sleeve; 11. a top cover; 12. reversing; 13. a bayonet; 14. an end cap; 15. a suction port; 16. a driving port; 17. a moving block; 18. a positioning strip; 19. positioning clamping grooves; 20. a reverse-proof luer fitting; 21. and the movable hole site.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1 to 4, the present embodiment discloses a liquid quantitative sampling device, which includes a sampling seat 1, a sampling member 4, a first driver and a second driver, wherein the sampling seat 1 has a sampling port 2 for sucking a liquid to be tested, and a sampling outlet 3 for releasing the liquid to be tested; the sampling piece 4 is movably arranged on the sampling seat 1, a sampling cavity 5 for storing liquid to be tested is arranged in the sampling piece 4, 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 reduced to negative pressure relative to the pressure at the sampling port 2 when the sampling cavity 5 is communicated with the sampling port 2, namely the first driver is configured to at least drive the pressure in the sampling cavity 5 to be smaller 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 achieve the purpose of extracting the liquid to be measured into the sampling cavity 5 through the sampling port 2; the second driver is configured to drive the pressure in the inner cavity of the sampling cavity 5 to be larger than or equal to the pressure at the position of the sample outlet 3 at least when the sampling cavity 5 is communicated with the sample outlet 3, when the release operation of the liquid to be measured needs to be carried out, the purpose of pushing the liquid to be measured in the sampling cavity 5 out of the sample outlet 3 can be achieved only by the pressure in the second driver, and then the purpose of releasing the liquid to be measured is achieved, wherein before the release operation is carried out, the pressure in the sampling cavity 5 can be equal to the pressure at the position of the sample outlet 3 through the second driver, so that the purpose of avoiding 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 reverse pushing action can be achieved, so that the liquid to be measured can be stored with a sufficient quantity in the sampling cavity 5 when the release operation of the liquid to be measured is carried out can be ensured, namely, the purpose of ensuring the accuracy of the sample measurement can be achieved, namely, by adopting a structure scheme of independently controlling the release operation of the liquid to be measured in the sampling cavity 5, the purpose of measuring the liquid to be measured in the first driver is achieved, the fact that the negative pressure in the sampling cavity 5 is required to be accurately measured by the fact is required to be measured in the sampling cavity 5, or the sample cavity is only has the fact that the accurate measurement is required to be measured in the sample cavity is accurately is measured, and the sample cavity is actually measured according to the fact is designed, and the sample is accurately is measured.

According to the liquid quantitative sampling device disclosed by the embodiment, the sampling piece 4, the first driver and the second driver are movably arranged in the sampling seat 1, meanwhile, the sampling cavity 5 is arranged in the sampling piece 4, when sampling operation is needed, the sampling piece 4 is only required to be driven to move on the sampling seat 1, when the sampling cavity 5 is communicated with the sampling port 2, the first driver is started to form negative pressure so as to perform operation of extracting liquid to be detected, so that the liquid to be detected is stored in the sampling cavity 5, then the sampling piece 4 is driven, the sampling cavity 5 is enabled to move to be communicated with the sampling port 3, then the second driver is started, the purpose of releasing the liquid to be detected through the sampling port 5 can be achieved, the purpose of reciprocating movement between the sampling port 2 and the sampling port 3 can be achieved through driving the sampling cavity 5, and the purpose of multiple times of moving the liquid to be detected can be achieved through the negative pressure pumping action of the first driver and the pushing action of the second driver, so that the requirement of multiple times of detection can be met, and the adaptability and positive pressure can be improved.

Preferably, referring to fig. 1 and 2, the first driver includes a syringe 6 mounted on the sampling seat 1, and the sampling port 2 is disposed corresponding to the syringe 6; when the sampling cavity 5 is communicated with the sampling port 2, the injection cylinder 6 is communicated with the sampling cavity 5, specifically, when the injection port of the injection cylinder 6 is communicated with the sampling cavity 5, i.e. one end of the sampling cavity 5 is communicated with the sampling port 2, the other end of the sampling cavity 5 is communicated with the injection port of the injection cylinder 6; when the sampling cavity 5 is separated from the sampling port 2, the first driver is separated from the sampling cavity 5; the structure of the injection tube 6 is adopted, the materials are convenient, when the suction operation of the liquid to be detected is carried out, the piston rod in the injection tube 6 is pulled towards the direction far away from the sampling piece 4, so that negative pressure can be generated in the injection tube 6, and the purpose of sucking the liquid to be detected can be realized because the injection tube 6 is communicated with the sampling cavity 5, wherein in other embodiments, the first driver can also comprise a balloon, a vacuum pump and other instruments capable of generating negative pressure.

Preferably, referring to the figure, the second driver comprises a rubber balloon 7 arranged on the sampling seat 1, and the sample outlet 3 is arranged corresponding to the rubber balloon 7; when the sampling cavity 5 is communicated with the sample outlet 3, the rubber balloon 7 is communicated with the sampling cavity 5, namely, when one end of the sampling cavity 5 is communicated with the sample outlet 3, the other end of the sampling cavity 5 is communicated with the rubber balloon 7; after the sample operation of liquid to be measured is accomplished, through removing sample piece 4, drive the sample chamber 5 that stores the liquid to be measured and move towards the direction of intercommunication sample outlet 3, in this in-process, sample chamber 5 and injection tube 6 separate, sample chamber 5 can not receive the influence of negative pressure, the problem that liquid to be measured in sample chamber 5 can not take place simultaneously and take out back into injection tube 6, when sample chamber 5 moves to intercommunication sample outlet 3, rubber sacculus 7 also communicates sample chamber 5 simultaneously, because before not squeezing rubber sacculus 7, because the atmospheric pressure in the rubber sacculus 7 equals the atmospheric pressure, namely equal the pressure of sample outlet 3 department, in-process that like this, sample chamber 5 moved to intercommunication sample outlet 3 and rubber sacculus 7, therefore, the problem that the liquid to be measured in sample chamber 5 can not appear reverse flow because of pressure imbalance, reach the purpose that ensures that the liquid to be measured in sample chamber 5 has enough to measure, in order to sample the precision of sample volume, when carrying out the guarantee that rubber sacculus 7 need to extrude in the rubber sacculus 7, the liquid to take out in the sample chamber 3 can be accomplished so, the sample outlet 3 is accomplished to liquid to the operation. In addition, it should be briefly noted that, in practical applications, the sampling amount during a single detection is generally low, so in structural design, the sampling cavity 5 is of a fine cavity structure, so that in the process of moving the sampling member 4, the surface tension between the liquid to be detected and the inner side wall of the sampling cavity 5 can generally counteract the fluidity effect caused by the gravity of the liquid to be detected, and therefore, in the moving process of the sampling cavity 5, the problem that the liquid to be detected in the sampling cavity 5 flows forward (in the direction towards the sample outlet 3) or flows backward (in the direction away from the sample outlet 3) will not occur.

In other embodiments, the second driver may be a syringe, a pressure pump, or other devices capable of generating positive pressure.

Of course, in other embodiments, if the second driver adopts the syringe structure, since the change amount of the inner cavity volume of the syringe will be larger when the piston rod is pushed and pulled, the generated pressure change amount is larger, and the problem of spraying the liquid to be detected easily occurs when the sample is discharged, so as to affect the detection of the liquid to be detected, and compared with the syringe, since the extrusion degree of the rubber balloon 7 is relatively well controlled, the change amount of the pressure generated by the rubber balloon 7 when the rubber balloon 7 is extruded is relatively smaller, therefore, in embodiments, the second driver adopts the structural form of the rubber balloon 7, and the effect of preventing the problem of spraying the liquid to be detected when the sample is discharged can be further achieved, so as to further improve the detection accuracy.

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

Preferably, referring to fig. 2 and 3, the sampling member 4 has a cubic structure, the sampling member 4 is slidably disposed in the movable cavity 8, and the purpose of moving the sampling cavity 5 in the sampling member 4 can be achieved by pushing and pulling the moving block 17 of the sampling member 4, so that the purpose that the sampling cavity 5 can move between the sampling port 2 and the sampling port 3 is achieved;

the sampling port 2 and the first driver are respectively positioned at two ends of the sampling seat 1 perpendicular to the sliding direction of the sampling piece 4, so that when the sampling cavity 5 is communicated with the sampling port 2, the first driver and the sampling port 2 are respectively positioned at two ends of the sampling cavity 5, and when the sampling is performed, only a quantity of liquid to be measured needs to be pumped by the injection cylinder 6, the injection cylinder is filled with the quantity of the liquid to be measured, so that the purpose that the sampling cavity 5 can be completely filled with the liquid to be measured can be achieved, the sampling quantity during detection is ensured, the sampling port 3 and the second driver are respectively positioned at two ends of the sampling seat 1 perpendicular to the sliding direction of the sampling piece 4, and the sampling port 3 and the sampling port 2 are positioned at the same side of the sampling seat 1, and the first driver and the second driver are positioned at the same side position, so that the sampling operation is facilitated;

the body of sampling piece 4 is run through in sampling chamber 5, and sampling chamber 5 sets up to the slip direction of perpendicular to sampling piece 4 in movable chamber 8, adopt sampling chamber 5 to run through the structural scheme of sampling piece 4 body, can play the effect that ensures sampling chamber 5 can stable intercommunication sampling mouth 2 and first driver, and ensure that sampling chamber 5 can stable intercommunication play the effect of sampling mouth 3 and second driver, simultaneously, because the die cavity of movable chamber 8 and the appearance looks adaptation of sampling piece 4, at the in-process of removing sampling piece 4, the purpose that just can play the port of interim shutoff sampling chamber 5 with the lateral wall that sampling chamber 5 port contacted in movable chamber 8, in order to avoid the leakage problem of the sampling volume when the pipetting to appear, improve the functional stability of product.

Preferably, referring to fig. 3, the sampling chambers 5 are provided in plural, the plural sampling chambers 5 are arranged on the sampling member 4 at intervals, and the distance between any two adjacent sampling chambers 5 is equal to the distance between the sampling port 2 and the sampling outlet 3 along the sliding direction of the sampling member 4, so, when the sampling chamber 5 at the relative middle position communicates with one of the sampling port 2 and the sampling outlet 3, at least one of the two sampling chambers 5 adjacent to the sampling chamber 5 is in communication, and by setting plural sampling chambers 5 arranged at intervals in parallel, the purpose of rapid pipetting for joint detection can be achieved.

Preferably, referring to fig. 1 and 4, the sampling seat 1 is detachably provided with a detection card 9, and the detection card 9 is correspondingly arranged with the sample outlet 3, so as to facilitate rapid detection.

Wherein, be equipped with the location strip 18 on the sampling piece 4, be equipped with in the activity chamber 8 can with location strip 18 matched with location draw-in groove 19, when sampling cavity 5 intercommunication sampling port 2 or play appearance mouth 3, location strip 18 is arranged in location draw-in groove 19 to reach spacing effect, make things convenient for sampling cavity 5 to aim at intercommunication sampling port 2 or play appearance mouth 3.

Specifically, the detachable of sampling port 2 is equipped with and prevents contrary luer connector 20, through preventing contrary luer connector 20, can play the effect of being convenient for be applied to medical field to prevent contrary luer connector 20 has the check valve, can play the effect of avoiding liquid to be measured to flow backwards away from sampling port 2.

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

1) According to the liquid quantitative sampling device, the structure scheme that the second driver is additionally arranged to independently control the release operation of the liquid to be tested is adopted, so that the effect that the liquid to be tested in the sampling cavity is prevented from being influenced by negative pressure back suction of the first driver before the liquid to be tested is released is achieved, and the accuracy of the sampling quantity in the sampling cavity is ensured;

2) The liquid quantitative sampling device can realize the purpose of taking liquid to be tested for multiple times by driving the sampling cavity to reciprocate between the sampling port and the sampling outlet and combining the negative pressure suction effect of the first driver and the positive pressure pushing effect of the second driver so as to meet the requirement of multiple times of detection and improve the adaptability;

3) The second driver adopts the structural form of the rubber saccule, and can also play a role in avoiding the problem of spraying the liquid to be detected during sample discharge so as to further improve the detection accuracy;

4) Through setting up a plurality of sampling chambers of arranging in parallel at intervals, can realize quick pipetting in order to carry out the purpose of joint detection.

Example two

In addition to the cubic structure mentioned in embodiment 1, the specific structures of the sampling seat 1 and the sampling member 4 may also be cylindrical structures in this embodiment, that is, referring to fig. 6 to 7, the sampling member 4 is cylindrical structures, the sampling member 4 is rotatably disposed in the movable cavity 8, and the purpose of driving the sampling cavity 5 to move can be achieved by rotating the sampling member 4.

Preferably, referring to fig. 5 and 6, the sampling seat 1 includes a sleeve 10 and a top cover 11 adapted to the sleeve 10, the sampling member 4 is rotatably installed between the sleeve 10 and the top cover 11, and the sampling cavity 5 is disposed parallel to the axial direction of the sampling member 4; the sampling port 2 and the sampling outlet 3 are arranged at the bottom of the sleeve 10, the sampling port 2 and the sampling outlet 3 are both positioned in the movement range of the bottom end of the sampling cavity 5, namely, the sampling port 2 and the sampling outlet 3 are both positioned in the rotation 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 positioned in the movement range of the top end of the sampling cavity 5, namely, the first driver and the second driver are both positioned in the rotation radius of the sampling cavity 5; the sleeve 10 top is equipped with back-off 12, is equipped with the bayonet socket 13 corresponding with back-off 12 on the top cap 11, and when top cap 11 assembled in sleeve 10 top, back-off 12 is located bayonet socket 13, through the structural style of looks lock, simple structure can play the effect of the lock installation sleeve 10 of being convenient for and top cap 11 simultaneously.

Wherein, be equipped with movable hole site 21 on the lateral wall of sampling seat 1, take a sample and take a shape on the outer wall of piece 4 and have movable block 17, when sampling cavity 5 is in the motion between sampling port 2 and the appearance mouth 3, movable block 17 is moved in movable hole site 22, so, through rotating movable block 17, can realize rotating sampling piece 4 in order to order about sampling cavity 5 to do the purpose of motion.

Example III

In addition, for the sampling seat 1 of the cylindrical structure, the sampling port, the sampling outlet, the first driver and the second driver may be disposed on the side wall of the sampling seat 1 of the cylindrical structure in addition to the two ends of the cylindrical structure, that is, referring to fig. 7 to 11, the sampling port 2, the sampling outlet 3, the first driver and the second driver are disposed on the side wall of the sampling seat 1; the sampling piece 4 is provided with a hollow cavity arranged along the axial direction, the two ends of the sampling piece 4 are respectively provided with an end cover 14, the cavity between the two end covers 14 forms a sampling cavity 5, the hollow cavity penetrates through the sampling piece 4 to meet the design requirement of the structural opening, and the end part of the hollow cavity is sealed by the end cover 14 to fulfill the aim of meeting the structural requirement of forming the sampling cavity 5; the side wall of the sampling piece 4 is provided with a suction opening 15 and a driving opening 16, and the suction opening 15 and the driving opening 16 penetrate through the side wall of the sampling piece 4 and are communicated with the sampling cavity 5; the sampling port 2 and the sample outlet 3 are both positioned 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, so that the purposes of arranging the sampling port, the sample outlet, the first driver and the second driver on the side wall of the sampling seat 1 can be realized.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A liquid quantitative sampling device, comprising:

the device comprises a sampling seat (1), wherein the sampling seat (1) is provided with a sampling port (2) for sucking liquid to be tested and a sample outlet (3) for releasing the liquid to be tested;

the sampling device comprises a sampling piece (4) movably arranged on a sampling seat (1), wherein a sampling cavity (5) for storing liquid to be tested is arranged in the sampling piece (4), and the sampling piece (4) is configured to drive the sampling cavity (5) to move between a sampling port (2) and a sampling outlet (3);

a first driver configured to at least drive a pressure within the sampling cavity (5) to a negative pressure relative to a pressure at the sampling port (2) when the sampling cavity (5) communicates with the sampling port (2); and

and the second driver is configured to drive the pressure in the inner cavity of the sampling cavity (5) to be larger than or equal to the pressure at the sample outlet (3) at least when the sampling cavity (5) is communicated with the sample outlet (3).

2. The liquid quantitative sampling device according to claim 1, wherein the first driver comprises a syringe (6) arranged on the sampling seat (1), and the sampling port (2) is arranged corresponding to the syringe (6);

when the sampling cavity (5) is communicated with the sampling port (2), the injection cylinder (6) is communicated with the sampling cavity (5).

3. The liquid quantitative sampling device according to claim 1, wherein the second driver comprises a rubber balloon (7) arranged on the sampling seat (1), and the sample outlet (3) is arranged corresponding to the rubber balloon (7);

when the sampling cavity (5) is communicated with the sample outlet (3), the rubber balloon (7) is communicated with the sampling cavity (5).

4. A liquid quantitative sampling device according to claim 1, 2 or 3, characterized in that the sampling seat (1) is provided with a movable cavity (8), the sampling member (4) is adapted to the cavity of the movable cavity (8), and the sampling member (4) is movably mounted in the movable cavity (8).

5. The liquid quantitative sampling device according to claim 4, characterized in that the sampling member (4) has a cubic structure, the sampling member (4) being slidably disposed in the movable chamber (8);

the sampling port (2) and the first driver are respectively positioned at two ends of the sampling seat (1) perpendicular to the sliding direction of the sampling piece (4), the sampling outlet (3) and the second driver are respectively positioned at two ends of the sampling seat (1) perpendicular to the sliding direction of the sampling piece (4), and the sampling outlet (3) and the sampling port (2) are positioned at the same side of the sampling seat (1);

the sampling cavity (5) penetrates through the body of the sampling piece (4), and the sampling cavity (5) is perpendicular to the sliding direction of the sampling piece (4) in the movable cavity (8).

6. The liquid quantitative sampling device according to claim 5, wherein a plurality of sampling chambers (5) are provided, the plurality of sampling chambers (5) are arranged at intervals on the sampling member (4), and the distance between any two adjacent sampling chambers (5) is equal to the distance between the sampling port (2) and the sampling outlet (3) along the sliding direction of the sampling member (4).

7. The liquid quantitative sampling device according to claim 5 or 6, wherein 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).

8. The liquid quantitative sampling device according to claim 4, wherein the sampling member (4) has a cylindrical structure, and the sampling member (4) is rotatably disposed in the movable chamber (8).

9. The liquid quantitative sampling device according to claim 8, wherein the sampling seat (1) comprises a sleeve (10) and a top cover (11) matched with the sleeve (10), and the sampling piece (4) is rotatably arranged between the sleeve (10) and the top 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 top cover (11);

the top of the sleeve (10) is provided with an inverted buckle (12), the top cover (11) is provided with a bayonet (13) corresponding to the inverted buckle (12), and when the top cover (11) is assembled at the top of the sleeve (10), the inverted buckle (12) is positioned in the bayonet (13).

10. The liquid quantitative sampling device according to claim 8, wherein 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 piece (4) is provided with a hollow cavity arranged along the axial direction, the two ends of the sampling piece (4) are respectively provided with an end cover (14), and the hollow cavity between the two end covers (14) forms the sampling cavity (5);

a suction opening (15) and a driving opening (16) are formed in the side wall of the sampling piece (4), and the suction opening (15) and the driving opening (16) penetrate through the side wall of the sampling piece (4) and are communicated with the sampling cavity (5);

the sampling port (2) and the sample outlet (3) are positioned 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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