Trace sample adding device

Abstract

The utility model relates to the technical field of microscale sample collection, and discloses a microscale sample adding device which comprises a base and a vertical rod fixed on the base, a sealing assembly A is fixed on the front side of the upper end of the vertical rod, and a sealing assembly B is arranged at the upper end of the vertical rod and located on one side of the sealing assembly A. The sealing assembly A comprises a piston sleeve A, a piston A and an ejector rod A arranged in the piston sleeve A, the piston is fixed on the piston A; the sealing assembly A comprises a piston sleeve A and a push rod A, the cylinder A is fixed outside the piston sleeve A, an output shaft of the cylinder A is fixed with the upper end of the push rod A, the opening and closing valve is fixed on one side of the bottom end of the piston sleeve A, the sealing assembly B comprises a piston sleeve B, a piston B arranged in the piston sleeve B, a push rod B fixed on the piston B and a cylinder B fixed outside the piston sleeve B, and an output shaft of the cylinder B is fixed with the upper end of the push rod B; according to the trace sample adding device, by arranging the sealing assembly A, the sealing assembly B, the middle cavity and the dropping pipette, the effects of automatic sample adding, complete discharging and dropping prevention are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro sample collection, in particular to a micro sample adding device. Background Art

[0002] Micropipette is a commonly used experimental instrument in many disciplines, especially in physical qualitative and quantitative detection experiments, which require high detection accuracy and need to ensure that the micropipette can accurately feed. At present, most of the micropipette on the market rely on manual sampling and manual addition, which requires the micropipette to repeat the sampling and addition process, which is cumbersome and easy to cause the test liquid sample to drip and pollute the test environment. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a micro-sample adding device, which has the advantages of automatic sample adding and anti-drip, and solves the problems of dripping and pollution caused by the existing manual sample adding.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro-sample adding device, comprising a base, a vertical rod fixed on the base;

[0007] A sealing component A is fixed to the front side of the upper end of the vertical rod, and a sealing component B is provided on one side of the sealing component A at the upper end of the vertical rod;

[0008] The sealing assembly A comprises a piston sleeve A;

[0009] Piston A, disposed in piston sleeve A;

[0010] Push rod A, fixed on piston A;

[0011] Cylinder A is fixed outside the piston sleeve A, and the output shaft of cylinder A is fixed to the upper end of push rod A;

[0012] The on-off valve is fixed to one side of the bottom end of the piston sleeve A;

[0013] The sealing assembly B comprises a piston sleeve B;

[0014] A piston B is disposed in a piston sleeve B;

[0015] Push rod B, fixed on piston B;

[0016] Cylinder B is fixed outside the piston sleeve B, and the output shaft of cylinder B is fixed to the upper end of push rod B;

[0017] A side pipe, fixed to one side of the bottom end of the piston sleeve B and connected to the interior thereof;

[0018] The barrel is fixed and connected to the side of the side tube away from the piston sleeve B, and is fixed to the upper end of the vertical rod;

[0019] A tail pipe, fixed to the bottom end of the piston sleeve B and connected to the interior thereof;

[0020] The bottom of the piston sleeve A is fixedly connected with an intermediate cavity, the bottom end of the intermediate cavity is fixedly connected with a drip tube, and one end of the tail pipe away from the piston sleeve B is fixed and connected with one side of the intermediate cavity.

[0021] In some embodiments, the upright is fixed to one side of the base.

[0022] In some embodiments, the height of the sealing component B is higher than the height of the sealing component A.

[0023] In some embodiments, solenoid valves are installed in both the side pipe and the tail pipe.

[0024] In some embodiments, the diameter of the middle portion of the intermediate cavity is larger than that of the lower end thereof.

[0025] In some embodiments, the tail pipe is an L-shaped structure, with the lower end extending obliquely downward.

[0026] In some embodiments, the bottom diameter of the dropper is smaller than the top diameter thereof.

[0027] In some embodiments, a heating component is provided outside the drip tube.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention provides a micro-sample adding device, which has the following beneficial effects:

[0030] 1. The micro-dosing device is provided with a sealing component A, a sealing component B, an intermediate cavity and a dropper. The cylinder B in the sealing component B is extended up and down, so that the piston sleeve B can cooperate with the piston B to pump liquid. According to the sealing performance of the piston, relatively accurate pumping can be achieved. When the material is fed to the intermediate cavity, it can be discharged from the dropper for dosing. When the pumping is completed, the push rod A drives the piston A upward to make the interior of the intermediate cavity present a negative pressure state. At this time, the liquid in the intermediate cavity will not drip, so as to avoid contaminating the work surface. At the same time, in order to completely discharge the liquid in the intermediate cavity, the piston A can also be extended up and down during pumping, and the opening and closing valve can be cooperated with it to realize the pumping of air into the interior of the intermediate cavity, thereby completely discharging the liquid in the intermediate cavity. When facing a viscous liquid, it can also be smoothly discharged, so as to achieve the effects of automatic dosing, complete discharge and dripping prevention.

[0031] 2. The micro-dosing device is provided with a dropper and a heating component. The diameter of the lower end of the dropper is small, so there will be no dripping problem under negative pressure, and the heating component can make the liquid with a certain viscosity be discharged smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the utility model;

[0033] Figure 2 It is a schematic diagram of the front side of the structure of the utility model;

[0034] Figure 3 It is a partial structural schematic diagram of the utility model;

[0035] Figure 4 It is a partial structural sectional view of the utility model.

[0036] In the figure:

[0037] 1. Base;

[0038] 2. Pole erection;

[0039] 3. Piston sleeve A;

[0040] 4. Piston A;

[0041] 5. Push rod A;

[0042] 6. Cylinder A;

[0043] 7. Open and close valve;

[0044] 8. Piston sleeve B;

[0045] 9. Piston B;

[0046] 10. Push rod B;

[0047] 11. Cylinder B;

[0048] 12. Side pipe;

[0049] 13. Material barrel;

[0050] 14. Tail pipe;

[0051] 15. Middle cavity;

[0052] 16. Dropper;

[0053] 17. Heating component. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0056] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0058] In the related technology, with the continuous development of the detection industry, the detection of trace liquids is becoming more and more widely used. Due to the trace amount of the detection samples, a micro-sampling device is needed to complete the detection, which is generally done in the form of manual extraction. However, this method is prone to accidental liquid dripping and cause contamination.

[0059] In order to solve the problems in the related art to a certain extent, the embodiment of the present application provides a micro-sample adding device. When it is needed, when the pumping is completed, the push rod A drives the piston A upward, so that the inside of the middle cavity is in a negative pressure state. At this time, the liquid in the middle cavity will not drip, so as to avoid contaminating the work surface.

[0060] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0061] Combination Figure 1-Figure 4 The embodiment of the present application provides a micro-injection device, including a base 1, a vertical rod 2 fixed on the base 1, a sealing component A is fixed to the front side of the upper end of the vertical rod 2, and a sealing component B is provided on the upper end of the vertical rod 2 on one side of the sealing component A. The sealing component A includes a piston sleeve A3, a piston A4, which is arranged in the piston sleeve A3, and a push rod A5, which is fixed on the piston A4; a cylinder A6, which is fixed outside the piston sleeve A3, and the output shaft of the cylinder A6 is fixed to the upper end of the push rod A5, an on-off valve 7, which is fixed to one side of the bottom end of the piston sleeve A3, and the sealing component B includes a piston sleeve B8, a piston B9, which is arranged in the piston sleeve B8, and a push rod B10, which is fixed on the piston On B9, the cylinder B11 is fixed on the outside of the piston sleeve B8, the output shaft of the cylinder B11 is fixed to the upper end of the push rod B10, the side tube 12 is fixed to one side of the bottom end of the piston sleeve B8 and is connected to the inside thereof, the barrel 13 is fixed to and connected to the side of the side tube 12 away from the piston sleeve B8, the inside of the barrel 13 can store the liquid to be sampled, and is fixed to the upper end of the vertical rod 2, the tail pipe 14 is fixed to the bottom end of the piston sleeve B8 and is connected to the inside thereof, the bottom of the piston sleeve A3 is fixedly connected to an intermediate cavity 15, the bottom end of the intermediate cavity 15 is fixedly connected to a drip tube 16, and the end of the tail pipe 14 away from the piston sleeve B8 is fixed to and connected to one side of the intermediate cavity 15.

[0062] according to Figure 3 It can be seen that by extending the cylinder B11 in the sealing component B up and down, the piston sleeve B8 can cooperate with the piston B9 to pump the liquid. When the material is delivered to the middle cavity 15, it can be discharged from the dropper 16 for sample addition. When the pumping is completed, the push rod A5 drives the piston A4 upward to make the inside of the middle cavity 15 present a negative pressure state. During pumping, the piston A4 can also be extended up and down, and the opening and closing valve 7 can be cooperated with it to realize the inflation of the inside of the middle cavity 15.

[0063] In some embodiments, the upright pole 2 is fixed to one side of the base 1 .

[0064] Other equipment that needs to take samples or receive samples can be conveniently placed on the base 1.

[0065] In some embodiments, the height of sealing component B is higher than the height of sealing component A.

[0066] The height difference can be used to allow the liquid to be discharged better.

[0067] In some embodiments, solenoid valves are installed in both the side pipe 12 and the tail pipe 14 .

[0068] When extracting liquid, the electromagnetic valves inside the two are opened alternately to achieve this effect. In some embodiments, the diameter of the middle position of the intermediate cavity 15 is larger than that of the lower end thereof.

[0069] For internal storage of liquids.

[0070] In some embodiments, the tail pipe 14 is an L-shaped structure, with the lower end extending obliquely downward.

[0071] It is convenient to install on one side and set into an L-shaped structure to reduce the resistance of the liquid when it moves forward.

[0072] In some embodiments, the bottom diameter of the drip tube 16 is smaller than the top diameter thereof.

[0073] The smaller diameter at the bottom allows for precise sample addition, and both can also effectively control negative pressure to stop flow.

[0074] In some embodiments, a heating component 17 is disposed outside the drip tube 16 .

[0075] The heating component 17 can be a heating wire or other heating equipment, which is used to heat the drip tube 16 so that the viscous liquid inside it can flow out better.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0077] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-sample adding device, comprising a base (1) and a vertical rod (2) fixed on the base (1); Features: A sealing component A is fixed to the front side of the upper end of the vertical rod (2), and a sealing component B is provided on one side of the sealing component A at the upper end of the vertical rod (2); The sealing assembly A comprises a piston sleeve A (3); A piston A (4) is disposed in the piston sleeve A (3); A push rod A (5), fixed on the piston A (4); The cylinder A (6) is fixed outside the piston sleeve A (3), and the output shaft of the cylinder A (6) is fixed to the upper end of the push rod A (5); An on-off valve (7) is fixed to one side of the bottom end of the piston sleeve A (3); The sealing assembly B comprises a piston sleeve B (8); A piston B (9) is disposed in a piston sleeve B (8); A push rod B (10) is fixed on the piston B (9); The cylinder B (11) is fixed outside the piston sleeve B (8), and the output shaft of the cylinder B (11) is fixed to the upper end of the push rod B (10); A side pipe (12) is fixed to one side of the bottom end of the piston sleeve B (8) and communicated with the interior thereof; The material barrel (13) is fixed to and communicates with the side of the side tube (12) away from the piston sleeve B (8), and is fixed to the upper end of the vertical rod (2); A tail pipe (14) is fixed to the bottom end of the piston sleeve B (8) and communicated with the interior thereof; The bottom of the piston sleeve A (3) is fixedly connected to an intermediate chamber (15), the bottom end of the intermediate chamber (15) is fixedly connected to a drip tube (16), and one end of the tail pipe (14) away from the piston sleeve B (8) is fixedly connected to and connected to one side of the intermediate chamber (15).

2. A micro-sampling device according to claim 1, characterized in that: The vertical rod (2) is fixed on one side of the base (1).

3. A micro-sampling device according to claim 1, characterized in that: The height of the sealing component B is higher than that of the sealing component A.

4. A micro-sampling device according to claim 1, characterized in that: Solenoid valves are installed in both the side pipe (12) and the tail pipe (14).

5. A micro-sampling device according to claim 1, characterized in that: The diameter of the middle portion of the intermediate cavity (15) is larger than that of the lower end thereof.

6. A micro-sample adding device according to claim 1, characterized in that: The tail pipe (14) is an L-shaped structure, with the lower end extending obliquely downward.

7. A micro-sample adding device according to claim 1, characterized in that: The diameter of the bottom end of the drip tube (16) is smaller than the diameter of the upper end thereof.

8. A micro-sample adding device according to claim 1, characterized in that: The drip tube (16) is provided with a heating component (17) outside.

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