CN216116918U - Quantitative micro-sampling device - Google Patents

Abstract

The utility model provides a quantitative micro-sampling device for solving the problem of low sampling automation degree in the sampling field, which comprises a rotary table, a supporting seat, a capillary tube, a lifting mechanism and an air injection mechanism, wherein the rotary table is provided with an accommodating groove, the supporting seat is hinged with the rotary table, the capillary tube is arranged on the supporting seat, one end of the capillary tube is used for absorbing sample liquid, the lifting mechanism is used for controlling one end of the capillary tube to move upwards or downwards, the air injection mechanism is provided with an air nozzle, and the air nozzle is used for blowing air flow towards one end of the capillary tube. According to the quantitative micro-sampling device, one end of the capillary tube moves downwards under the action of the lifting mechanism, extends into a water sample to absorb sample liquid, then moves upwards under the action of the lifting mechanism, so that one end of the capillary tube is positioned in front of the air nozzle, the air nozzle blows air towards one end of the capillary tube, the sample liquid absorbed by the capillary tube is blown out from the other end of the capillary tube and falls into the accommodating groove, and therefore automatic sampling work can be achieved.

Description

Quantitative micro-sampling device

Technical Field

The utility model relates to the field of sampling, in particular to a quantitative micro-sampling device.

Background

The existing quantitative micro-sampling device generally needs to manually use a capillary tube to sample and take a detection reagent, has low automation degree, and is not suitable for an online water quality detection system.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a quantitative micro-sampling device which can be applied to an online water quality detection system and can continuously work and collect sample liquid without maintenance.

The quantitative micro-sampling device comprises a rotary table, a bracket, a capillary tube, a lifting mechanism and an air injection mechanism, wherein the rotary table is provided with an accommodating groove, the bracket is hinged with the rotary table, the capillary tube is arranged on the bracket, one end of the capillary tube is used for sucking sample liquid, the lifting mechanism is used for controlling the one end of the capillary tube to move upwards or downwards, and the air injection mechanism is provided with an air nozzle which is used for blowing air flow towards the one end of the capillary tube.

The quantitative micro-sampling device provided by the embodiment of the utility model has the following beneficial effects: the one end of capillary moves down under elevating system's effect, stretch into and absorb the sample liquid in the water sample, treat that sample work accomplishes the back, the one end of capillary moves up under elevating system's effect, the one end department that makes the capillary is in the place ahead of air nozzle, the air nozzle blows towards the one end of capillary, blow off the sample liquid that the capillary was absorb from the other end of capillary, fall into the holding tank in, process more than the repetition, thereby can realize automatic sample work, can continuous operation, need not to maintain and gather the sample liquid.

According to some embodiments of the utility model, the lifting mechanism comprises an electromagnet and an iron block, the iron block is arranged at one end of the bracket, the electromagnet is arranged above the turntable, and the electromagnet is used for electrifying and magnetically attracting the iron block.

According to some embodiments of the utility model, the lifting mechanism further comprises a second drive member in driving connection with the bracket.

According to some embodiments of the present invention, the device further comprises a first driving member, the first driving member is in transmission connection with the turntable, and the first driving member is used for driving the turntable to rotate.

According to some embodiments of the utility model, the lifting mechanism comprises a limiting frame and a balancing weight, the balancing weight is arranged at one end of the bracket, the limiting frame comprises a lifting frame and a placing frame, the lifting frame extends upwards in an inclined manner, and the lifting frame is used for abutting against one end of the capillary tube and enabling the capillary tube to move upwards when rotating along with the turntable; the upper end of the ascending frame is connected with the placing frame, the placing frame is arranged below the air nozzle and extends along the horizontal direction, and the placing frame is used for placing one end of the capillary tube.

According to some embodiments of the utility model, the bracket is provided in plurality.

According to some embodiments of the utility model, the air nozzle is provided in plurality.

According to some embodiments of the utility model, the bottom of the receiving groove is provided with an external communication hole.

According to some embodiments of the utility model, the one end of the capillary tube is provided with a flare structure.

According to some embodiments of the utility model, the capillary tube is made of one of glass, quartz, ceramic.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the overall assembly of a quantitative micro-sampling device according to a first embodiment of the present invention;

FIG. 2 is a top view of the quantitative microsampling device of FIG. 1;

FIG. 3 is a front view of the quantitative microsampling device of FIG. 1;

FIG. 4 is a schematic view of the quantitative microsampling device of FIG. 1 rotated to another angle for overall assembly;

FIG. 5 is a schematic view of the overall assembly of a quantitative micro-sampling device according to a second embodiment of the present invention;

FIG. 6 is a schematic view of the quantitative microsampling device of FIG. 5 rotated to another angle for overall assembly.

Reference numerals:

a turntable 100, an accommodating groove 110, an outer communicating hole 111 and a limiting column 120;

a bracket 200;

a capillary tube 300, a flare structure 310;

a lifting mechanism 400;

an electromagnet 410, an iron block 420;

a limiting frame 430, an ascending frame 431, a placing frame 432, a descending frame 433 and a balancing weight 440;

an air nozzle 510;

a first driving member 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional or orientational descriptions, such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "pointed", "inner", "outer", "axial", "radial", "circumferential", etc., are given with reference to the positional or orientational relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, the sidewall means a left sidewall and/or a right sidewall.

In the description of the present invention, "a plurality" means two or more, "more than", "less than", "more than", and the like are understood as excluding the present number, and "more than", "less than", "in", and the like are understood as including the present number. If the description of "first" and "second" is used for the purpose of distinguishing technical features, the description is not intended to indicate or imply relative importance or to implicitly indicate the number of the indicated technical features or to implicitly indicate the precedence of the indicated technical features.

In the description of the present invention, it should be understood that "a is disposed on B" and "a is disposed on B" merely express the connection relationship between a and B, and do not represent that a is above B.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "bolted" and "screwed" are equally interchangeable. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

Referring to fig. 1 to 6, the quantitative micro-sampling device according to the embodiment of the present invention includes a turntable 100, a holder 200, a capillary 300, a lifting mechanism 400, and an air injection mechanism, wherein the turntable 100 is provided with a holding groove 110, the holder 200 is hinged to the turntable 100, the capillary 300 is disposed on the holder 200, one end of the capillary 300 is used for sucking a sample liquid, the lifting mechanism 400 is used for controlling one end of the capillary 300 to move upward or downward, and the air injection mechanism is provided with an air nozzle 510, and the air nozzle 510 is used for blowing an air flow toward one end of the capillary 300.

A capillary tube 300, which is a tube capable of generating a significant capillary phenomenon; capillary phenomenon (also called capillary 300 action) refers to the phenomenon that when a liquid is inside a thin tubular object, the liquid rises by overcoming the gravity due to the difference between cohesion and adhesion; the capillary phenomenon refers to that the infiltrating liquid rises in the thin tube and the non-infiltrating liquid falls in the thin tube; the phenomenon that liquids diffuse along the surface of a solid and adhere to each other when they come into contact with the solid is called wetting; if the contact surface of the liquid tends to shrink and fail to adhere when the liquid contacts the solid, the liquid is said to be non-wetting to the solid, or non-wetting for short.

The turntable 100 is generally a platform, and is parallel to the horizontal plane, and in practical use, a concave portion for accommodating a water sample to be detected, such as a water sample pool to be detected (the water sample to be detected is an immersion liquid), is arranged below the turntable 100; the turntable 100 is provided with a receiving groove 110, and the receiving groove 110 is used for receiving the sample liquid sucked by the capillary 300. The bracket 200 is generally disposed at the edge of the turntable 100 (of course, a special slot may be formed in the turntable 100 to place the bracket 200 in the turntable 100), the bracket 200 is used to place the capillary 300, and the bracket 200 is hinged to the turntable 100, when the bracket 200 rotates, the capillary 300 rotates, and one end of the capillary 300 tilts, so that one end of the capillary 300 moves upward or downward. The lifting mechanism 400 is a mechanism for controlling one end of the capillary 300 to move upwards or downwards, and is generally disposed near the bracket 200, and the lifting mechanism 400 may be a mechanism for actively driving the bracket 200 to rotate, so as to move one end of the capillary 300 upwards or downwards, such as a servo motor which is in transmission connection with the bracket 200 and can rotate in a forward and backward direction, and an electromagnet 410 which can attract an iron block 420 on the bracket 200; the elevating mechanism 400 may be a mechanism for passively moving one end of the capillary 300 upward or downward, such as a stopper 430. The air injection mechanism generally has conventional arrangements such as connecting pipes, an air pump (or other air supply components such as a high-pressure air cylinder and a fan), and a valve, and an air nozzle 510 is disposed at the end of the air injection mechanism, the air nozzle 510 is generally disposed near the outer side of the turntable 100, and the air nozzle 510 can blow air towards one end of the capillary 300. It should be understood that the turntable 100, the air injection mechanism, and the lifting mechanism 400 are all connected together through a base, a stage, the ground, and other objects to be carried, and are located in the same space.

A concave part for accommodating a water sample to be detected is arranged below the turntable 100, and the concave part can completely cover the position below the turntable 100 or be only positioned in a certain side area below the turntable 100; one end of the capillary 300 moves downwards (the bracket 200 rotates) under the action of the lifting mechanism 400 until one end of the capillary 300 extends into the water sample to be detected in the area, and the water sample to be detected is sucked into the capillary 300 under the capillary phenomenon; after the sampling operation is completed, under the action of the lifting mechanism 400, one end of the capillary 300 moves upwards (the bracket 200 rotates), and finally the end of the capillary 300 is approximately aligned with the air outlet of the air nozzle 510, the air nozzle 510 blows air towards one end of the capillary 300, and the air flow pushes the sample liquid, so that the sample liquid in the capillary 300 overcomes the resistance of the sample liquid and the capillary 300 and the adhesive force of the sample liquid to the inner wall of the capillary 300, the sample liquid is pushed to move, and finally the sample liquid sucked by the capillary 300 is blown out from the other end of the capillary 300, and falls into the accommodating groove 110, and the sampling operation is completed; the above processes are repeated, so that the quantitative micro-sampling device can realize automatic sampling work, can continuously work and can collect the sample liquid without maintenance.

Referring to fig. 1 to 4, in some embodiments of the present invention, the lifting mechanism 400 includes an electromagnet 410 and an iron block 420, the iron block 420 is disposed at one end of the bracket 200, the electromagnet 410 is disposed above the turntable 100, and the electromagnet 410 is used for electrically attracting the iron block 420.

The iron block 420 is arranged at one end of the bracket 200, and is mainly used for attracting the iron block 420 when the electromagnet 410 is powered on, so that the iron block 420 moves upwards, and thus one end of the bracket 200 is driven to move upwards (namely the bracket 200 rotates), and one end of the capillary tube 300 is driven to move upwards, after the power is off, the magnetic force of the electromagnet 410 disappears, and one end of the capillary tube 300 moves downwards under the action of gravity and stretches into the water sample to be detected again; the other function of the iron block 420 at one end of the bracket 200 is to serve as a weight 440, so that one end of the capillary 300 moves downward under the action of gravity, rather than the other end of the capillary 300 moving downward under the action of gravity (especially when the sample liquid moves to the other end of the capillary 300, resulting in the other end of the capillary 300 being heavier). The electromagnet 410 controls the upward movement or the downward movement of one end of the capillary 300, so that the control is convenient and the automatic sampling management is carried out.

In some embodiments of the present invention, the lifting mechanism 400 comprises an elastic member having one end connected to one end of the bracket 200 and the other end connected to the turntable 100.

It should be understood that two arrangements of the resilient member are possible: firstly, as an improvement of the above scheme, the elastic member is used as a buffer member, and when one end of the capillary tube 300 moves downward under the action of gravity (when the bracket 200 rotates), the elastic member plays a role of stretching and buffering one end of the bracket 200, so as to prevent the capillary tube 300 from directly smashing into a water sample to be measured; secondly, as another embodiment of the above scheme, the elastic member plays a certain fixing and resetting role, under the action of the elastic member, when there is no other external force, one end of the capillary tube 300 is located approximately in front of the air injection tube, playing a certain fixing role, under the action of other external forces of the lifting mechanism 400, such as the above magnetic force and the second driving member below, one end of the capillary tube 300 moves downwards, extends into the water sample to be tested, sucks the sample liquid, simultaneously stretches the elastic member, the elastic member accumulates elastic force, after the sampling operation is completed, the acting force disappears, the elastic member releases the elastic force, and one end of the pulling appearance phase moves upwards, playing a resetting role. It is to be understood that the resilient member may be a spring, a rubber ring, or the like.

In some embodiments of the utility model, the lifting mechanism 400 further comprises a second driving member in driving connection with the bracket 200.

The second driving member is connected with the bracket 200 in a transmission way, so that one end of the capillary tube 300 can move upwards or downwards by controlling the rotation of the bracket 200, and the operation is simpler and more direct. It will be appreciated that the second drive member may be a servo motor, stepper motor or the like which may be reversible.

Referring to fig. 1 to 6, in some embodiments of the present invention, a first driving member 600 is further included, the first driving member 600 is in transmission connection with the turntable 100, and the first driving member 600 is configured to drive the turntable 100 to rotate.

The first driving member 600 is connected to the turntable 100 in a driving manner, so as to drive the turntable 100 to rotate substantially in a horizontal plane, and in actual use, the turntable 100 is driven by the first driving member 600 to rotate, the brackets 200 on the turntable 100 and the capillary tubes 300 on the brackets 200 rotate, and the capillary tubes 300 move to different places as the turntable 100 rotates, so that different tasks can be completed. It should be understood that the first driving member 600 can be directly connected to the turntable 100, located above or below the turntable 100, or indirectly connected to the turntable 100 through gears, belts, chains, etc.

A concave part for accommodating the water sample to be measured is arranged below the turntable 100, the concave part can completely cover the position below the turntable 100, or can be only arranged in a certain side area below the turntable 100, and for convenience of explanation, the concave part is assumed to be arranged in the lower area of the turntable 100 in the six o' clock direction, and other working places are assumed to be arranged in other directions indicated by the turntable 100 according to the time scale; when the turntable 100 is driven by the first driving member 600 to rotate and the capillary 300 is driven to move to the turntable 100 in the six o' clock direction (the first place), one end of the capillary 300 moves downwards (the bracket 200 rotates) under the action of the lifting mechanism 400 until one end of the capillary 300 extends into the water sample to be detected in the area, and the water sample to be detected is sucked into the capillary 300 under the capillary phenomenon; after the sampling operation is completed, the turntable 100 continues to rotate clockwise under the driving of the first driving member 600, the capillary 300 is carried to move to the three o' clock direction (the second place) of the turntable 100, and simultaneously, under the action of the lifting mechanism 400, one end of the capillary 300 moves upwards (the bracket 200 rotates), and finally, the capillary 300 is approximately aligned with the air outlet of the air nozzle 510, the air nozzle 510 blows air towards one end of the capillary 300, and the sample liquid sucked by the capillary 300 is blown out from the other end of the capillary 300 and falls into the accommodating groove 110.

The above is a simpler embodiment, and further improved on the above, another holding chamber for the sample to be tested or the reagent to be tested may be provided below the turntable 100 in the twelve o 'clock direction (the third place), and another air nozzle 510 of the air injection mechanism may be provided in the turntable 100 in the nine o' clock direction (the fourth place). It should be understood that the air nozzle 510 located at the second location may be located directly at the first location (the turntable 100 is required to rotate when the number of the brackets 200 is small, and the turntable 100 is not required to rotate when the air nozzle 510 is located at each sampling work location), and the like. It should be understood that, according to the principle of the above arrangement, the specific positions, functional roles, and whether the work sites need to be increased or decreased of the first site, the second site, the third site, and the like can be freely determined according to the actual use requirements.

Referring to fig. 5 and 6, in some embodiments of the present invention, the lifting mechanism 400 includes a limiting frame 430 and a weight block 440, the weight block 440 is disposed at one end of the bracket 200, the limiting frame 430 includes a lifting frame 431 and a placing frame 432, the lifting frame 431 extends obliquely upward, the lifting frame 431 is used for abutting one end of the capillary 300 and enabling the capillary 300 to move upward when rotating with the turntable 100; the upper end of the ascending frame 431 is connected with a placing frame 432, the placing frame 432 is arranged below the air nozzle 510, the placing frame 432 extends along the horizontal direction, and the placing frame 432 is used for placing one end of the capillary tube 300.

A weight block 440 is provided to allow one end of the capillary 300 to naturally abut against the stopper 430 under the action of gravity. And as the turntable 100 rotates, one end of the capillary tube 300 may be raised along the rising frame 431 and finally moved onto the placing frame 432 such that one end of the capillary tube 300 is approximately aligned with the outlet of the air nozzle 510. The limiting frame 430 and the balancing weight 440 are arranged to enable one end of the capillary tube 300 to move upwards, extra driving force is not needed, and sampling cost is saved. It is to be understood that the rack 432 and the riser 431 need not be connected together. It should be understood that a descending shelf 433 may be further provided, the descending shelf 433 being configured to abut against one end of the capillary 300 and enable the capillary 300 to move downward when the turntable 100 rotates.

Referring to fig. 1 to 6, in some embodiments of the present invention, the turntable 100 is further provided with a position-limiting post 120, and the position-limiting post 120 is used for limiting one end of the capillary 300.

Be provided with spacing post 120, set up a extreme position for capillary 300's one end when moving up or moving down, when capillary one end moved this extreme position, capillary 300 or bracket 200 butt spacing post 120 to it is spacing by spacing post 120, can not continue to move again, prevent that capillary 300's one end from rotating too greatly, touch the object, damage capillary 300.

Referring to fig. 1-6, in some embodiments of the utility model, the bracket 200 is provided in plurality.

The bracket 200 is provided with a plurality of brackets, so that the same water sample to be tested can be sampled for a plurality of times, and different water samples to be tested, detection reagents and the like can be sampled simultaneously or respectively, or the combination of the two schemes is adopted.

Referring to fig. 1 to 6, in some embodiments of the present invention, the air nozzle 510 is provided in plurality.

The plurality of air nozzles 510 may be provided to simultaneously perform air blowing operations on different capillaries 300 of the plurality of brackets 200, or may perform air blowing operations when the same capillary 300 is rotated to different work places.

Referring to fig. 2, in some embodiments of the present invention, the bottom of the receiving groove 110 is provided with an external communication hole 111.

The bottom of the housing tank 110 is provided with an external communication hole 111, and the sample liquid in the housing tank 110 can be transported to a place where further processing is possible through the external communication hole 111, or the sample liquid or the detection reagent of different housing tanks 110 can be intensively mixed through the external communication hole 111, or the holes can be cleaned as waste liquid.

Referring to fig. 1-6, in some embodiments of the utility model, one end of the capillary tube 300 is provided with a flare structure 310.

One end of the capillary 300 is provided with a bell-mouth structure 310, so that the contact area of one end of the capillary 300 is increased, and the sample liquid is better absorbed or blown by the air nozzle 510.

Referring to fig. 1-6, in some embodiments of the utility model, the capillary tube 300 is made of one of glass, quartz, and ceramic.

The capillary 300 is made of one of glass, quartz, and ceramic, and is made of a hard material, which is suitable for the rotation of the capillary 300, so that one end of the capillary 300 can be moved to a correct position.

Referring to fig. 1 to 6, in some embodiments of the present invention, the first driving member 600 is a stepping motor or a servo motor.

The first driving member 600 is a stepping motor or a servo motor, which facilitates to control the turntable 100 to rotate accurately, so that the capillary tube 300 can stay at the correct working place accurately.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A quantitative microsampling device, comprising:

a turntable provided with a holding tank;

the bracket is hinged with the rotary disc;

the capillary tube is arranged on the bracket, and one end of the capillary tube is used for sucking sample liquid;

the lifting mechanism is used for controlling the one end of the capillary tube to move upwards or downwards;

and the air injection mechanism is provided with an air injection nozzle, and the air injection nozzle is used for blowing air flow towards the one end of the capillary tube.

2. The quantitative microsampling device of claim 1, wherein the lifting mechanism comprises an electromagnet and an iron block, the iron block is disposed at one end of the holder, the electromagnet is disposed above the turntable, and the electromagnet is used for electrically attracting the iron block.

3. The quantitative microsampling device of claim 1, wherein the lifting mechanism further comprises a second driving member drivingly connected to the receptacle.

4. The quantitative microsampling device of claim 1, further comprising a first driving member, the first driving member being in driving communication with the turntable, the first driving member being configured to drive the turntable in rotation.

5. The device according to claim 4, wherein the elevating mechanism comprises a limiting frame and a weight block, the weight block is disposed at one end of the supporting seat, the limiting frame comprises an ascending frame and a placing frame, the ascending frame extends obliquely upward, the ascending frame is used for abutting against one end of the capillary tube and enabling the capillary tube to move upward when rotating along with the rotating disc; the upper end of the ascending frame is connected with the placing frame, the placing frame is arranged below the air nozzle and extends along the horizontal direction, and the placing frame is used for placing one end of the capillary tube.

6. The quantitative microsampling device of claim 1 or 4, wherein the holder is provided in plurality.

7. The quantitative microsampling device of claim 1 or 4, wherein the air nozzle is provided in plurality.

8. The quantitative microsampling device of claim 1, wherein the bottom of the housing tank is provided with an external communication hole.

9. The quantitative microsampling device of claim 1, wherein the one end of the capillary is provided with a flare structure.

10. The quantitative microsampling device of claim 1, wherein the capillary is made of one of glass, quartz, ceramic.

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