CN204142525U - A kind of micro liquid sampling sample adding device - Google Patents

Abstract

The utility model discloses a trace liquid sampling and adding device. It includes a sampling head, a liquid storage tube and a sampling head; the sampling head is connected with a quantitative capillary; a port of the liquid storage tube is sealed with a film, and a boss is provided at the place where the film is connected; The other end of the liquid storage tube is matched with the sampling head, and the sampling head can move along the length direction of the liquid storage tube; the sampling head can be connected with the film end of the liquid storage tube In cooperation, the quantitative capillary pierces the film and extends into the cavity of the liquid storage tube. The utility model micro-liquid sampling and adding device has strong versatility, reasonable structural design, and combines quantitative sampling, reagent dilution and mixing, and adding multiple functions in one, which not only saves the purchase and maintenance costs of purchasing various micro-sampling instruments, It also effectively simplifies the operation steps and greatly improves the experimental efficiency.

Description

A micro liquid sampling and adding device

technical field

The utility model relates to a trace liquid sampling and adding device.

Background technique

With the continuous development of the detection industry, the detection of trace liquids is becoming more and more widely used. Due to the small amount of detection samples, it is necessary to use a trace sampling device to complete the detection. However, most of the existing micro samplers can only complete the sampling function, and then need to use a pipette to quantify and transfer micro samples and reagents for reaction, which requires the cooperation of a large number of micro tools, which not only greatly increases Equipment purchase cost and maintenance cost, and the steps are cumbersome and inefficient. A kind of quantitative siphon dropper that exists on the existing market, although sampling and mixing are all very simple and convenient in sampling and liquid mixing compared with the utility model, but the former can only take the method of dripping liquid in terms of adding samples. It is not possible to add samples by injection, because the reagent tube needs to be squeezed, and if the force is too strong, it may cause leakage between the gaps; in addition, because the squeezed reagent tube is elastic, it is very inconvenient to operate, and often The liquid cannot be squeezed out well due to insufficient squeezing force of the operator, and once the force is withdrawn during the operation, it is easy to cause back-suction.

Utility model content

The purpose of the utility model is to provide a micro-liquid sampling and adding device, which can not only perform quantitative sampling of micro-liquid samples, but also further complete sample dilution, mixing and sampling, which solves the problem of sampling in the prior art. , Mixing, cumbersome and inefficient steps of adding samples.

The micro liquid sampling and adding device provided by the utility model comprises a sampling head, a liquid storage tube and a sampling head;

A quantitative capillary is connected to the sampling head;

One port of the liquid storage tube is sealed with a film, and a boss is provided at the place where the film is connected; the other end of the liquid storage tube is matched with the sampling head, and the sampling head can move along the The length direction movement of the liquid storage tube;

The sampling head can cooperate with the film end of the liquid storage tube, so that the quantitative capillary pierces the film and extends into the cavity of the liquid storage tube.

In the trace liquid sampling and adding device, one end of the liquid storage tube is connected to an annular body to form the boss, and when the sampling head cooperates with the liquid storage tube, the sampling head will match the The above-mentioned boss is offset, thereby realizing the limit between the sampling head and the liquid storage tube;

The inner wall of the annular body is provided with several annular protrusions, and the arrangement of the annular protrusions can prevent the liquid in the liquid storage tube from flowing out.

In the micro-liquid sampling and adding device, the inner wall of the liquid storage tube is provided with several annular protrusions, which have the function of preventing the sampling head from falling off from the liquid storage tube. Play a role in limiting and preventing liquid leakage during the process.

In the micro-volume liquid sampling and adding device, the cavity of the sampling head changes from one end to the outlet end thereof. When moving, the liquid in the liquid storage tube is compressed and the pressure increases, and the above arrangement of the cavity of the sampling head helps the liquid to flow out from the outlet port.

In the trace liquid sampling and adding device, from the large-diameter end to the small-caliber end, the sampling head is composed of a cylinder a, a frustum of a cone and a cylinder b in sequence, that is, the cylinder a and the frustum of a cone The large-diameter end of the frustum is connected, and the small-diameter end of the frustum is connected with the cylinder b.

The micro liquid sampling and adding device of the utility model has the following advantages:

The utility model micro-liquid sampling and adding device has strong versatility, reasonable structural design, and combines quantitative sampling, reagent dilution and mixing, and adding multiple functions in one, which not only saves the purchase and maintenance costs of purchasing various micro-sampling instruments, It also effectively simplifies the operation steps and greatly improves the experimental efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the appearance of the micro-liquid sampling and adding device of the present invention.

Fig. 2 is a schematic view of the liquid storage tube and the sampling head in the micro-liquid sampling and adding device of the present invention.

Fig. 3 is a schematic diagram of the cooperation between the liquid storage tube and the sampling head in the micro-liquid sampling and adding device of the present invention.

The marks in the figure are as follows:

1 Sampling head, 2 Sealing film, 3 Liquid storage tube, 4 Liquid storage chamber, 5 Annular protrusion I, 6 Annular protrusion II, 7 Sample adding head, 8 Boss.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the utility model is not limited to the following embodiments.

As shown in FIG. 1 , it is a schematic diagram of the appearance of the micro-liquid sampling and adding device of the present invention, which includes a sampling head 1 , a liquid storage tube 3 and a sampling head 7 . As shown in Figure 3, one end of the sampling head 1 is connected with a quantitative capillary (not marked); (Not marked in the figure), this annular body forms a boss 8 with one end of liquid storage pipe 3, and sampling head 1 can match with one end of liquid storage pipe 3, and when matching, sampling head 1 can be with boss 8 offset, thereby realizing the limitation between the sampling head 1 and the liquid storage tube 3 . When the sampling head 1 cooperates with the liquid storage tube 3 , the quantitative capillary on the sampling head 1 pierces the sealing film 2 and extends into the cavity of the liquid storage tube 3 . In addition, a plurality of annular protrusions I5 are provided on the inner wall of the annular body connected to the liquid storage tube 3 to prevent the liquid in the liquid storage tube 3 from flowing out. The other end of the liquid storage tube 3 is matched with the sampling head 7, and the sampling head 7 can move along the length direction of the liquid storage tube 3, and a plurality of annular protrusions II6 are arranged on the inner wall of the liquid storage tube 3, such as As shown in the partial enlarged view in FIG. 2 , it has the function of preventing the sampling head 7 from falling off from the liquid storage tube 3 .

In order to facilitate sample addition, the cavity of the sample injection head 7 is set to a form that changes from one end to its outlet end, as shown in Figure 2 and Figure 3, from the large-caliber end to the small-caliber end, the sample addition The head 7 is composed of a cylinder a, a frustum of a cone and a cylinder b in turn, that is, the cylinder a is connected with the large diameter end of the cone, and the small diameter end of the cone is connected with the cylinder b. When adding a sample, the When the sampling head 7 moves to the other end of the liquid storage tube 3, the liquid in the liquid storage tube 3 is compressed and the pressure increases. The above-mentioned arrangement of the cavity of the sampling head 7 helps the liquid to flow out from its outlet end.

The following describes in detail the use process of the micro-volume liquid sampling and adding device of the present invention:

When it is necessary to sample a small amount of liquid, the quantitative capillary of the sampling head 1 is used to draw the sample through the siphon phenomenon, and different sizes of the capillary can be used to absorb a small amount of liquid of different volumes. After the quantitative capillary has sucked the sample, use it to puncture the sealing film 2 on the top of the liquid storage tube 3 and seal the middle part of the sampling head 1 in the liquid storage cavity 4 of the liquid storage tube 3, and the sampling head 1 and the liquid storage tube 3 The boss 8 on the top offsets to realize the limit between the sampling head 1 and the liquid storage tube 3, and the annular protrusion I5 on the annular body cooperates with the sampling head 1 to prevent the internal liquid in the liquid storage chamber 4 from flowing out. Hold the upper part of the liquid storage tube 3 and shake it downwards, so that the sample in the quantitative capillary enters the liquid storage chamber 4, and then turn the micro-liquid sampling and adding device upside down to achieve the mixing of the micro-sample and the reagent in the liquid storage chamber. role; or reciprocating relative movement between the sampling head 7 and the liquid storage tube 3 to achieve the effect of liquid mixing.

When the utility model is used for adding samples, hold the sampling head 1 and the liquid storage tube 3 and push the sampling head 7 downward, then the sampling head 7 moves to the inside of the cavity of the liquid storage tube 3, so that the liquid storage chamber 4 gradually shrink, and at the same time, the reagent in the liquid storage chamber 4 is squeezed out of the liquid storage chamber 4, and then the sample addition is completed.

The micro-liquid sampling and adding device of the utility model combines quantitative sampling, reagent dilution and mixing, and multiple functions of adding samples, which not only saves the purchase and maintenance costs of purchasing various micro-sampling instruments, but also effectively simplifies the operation steps. It is easy to operate and greatly improves the experimental efficiency.

Claims (5)

1. a micro liquid sampling sample adding device, is characterized in that: it comprises a sampling head, a liquid storage pipe and a feed head;

Described sampling head is connected with quantitative capillary tube;

The Single port of described liquid storage pipe is sealed with film, and connects described film place and be provided with boss; The other end of described liquid storage pipe matches with described feed head, and described feed head can move along the length direction of described liquid storage pipe;

Described sampling head can match with the described film end of described liquid storage pipe, makes described quantitative capillary tube puncture described film and extends in the cavity of described liquid storage pipe.

2. sampling sample adding device according to claim 1, is characterized in that: one end of described liquid storage pipe connects a ring bodies and forms described boss;

The inwall of described ring bodies is provided with several circular protrusions.

3. sampling sample adding device according to claim 1 and 2, is characterized in that: the inwall of described liquid storage pipe is provided with several circular protrusions.

4. sampling sample adding device according to claim 3, is characterized in that: the cavity of described feed head by one end to its endpiece from large to small.

5. sampling sample adding device according to claim 4, is characterized in that: by heavy caliber end to small-caliber end, described feed head is made up of right cylinder a, Rotary-table and right cylinder b successively.