CN202570201U - Volumetric flask drainage device - Google Patents

Abstract

The utility model belongs to the field of chemical instruments and equipment, in particular to a volumetric flask drainage device. The drainage device includes a container (1) and an extension part (2) arranged at the bottom of the container (1), the extension part (2) has a through hole (3), the through hole (3) communicates with the container (1), and the extension part ( 2) It has a frosted outer wall, the diameter of the through hole (3) is greater than 0.5 cm, and the container (1) is in the shape of a truncated cone with a large upper bottom and a smaller lower bottom. The utility model has the advantages of simple structure and convenient operation, which makes the liquid transfer operation simple and ensures the accuracy of the concentration of the prepared solution.

Description

A volumetric flask drainage device

technical field

The utility model belongs to the field of chemical instruments and equipment, in particular to a volumetric flask drainage device.

Background technique

A volumetric flask is a precise instrument for preparing a solution with an accurate concentration of a certain substance. In the experiment, it is often necessary to use a volumetric flask to prepare a solution with a certain concentration of the substance for the experiment. However, the following problems are prone to occur: in the process of pipetting, sometimes the mouth of the volumetric flask is small, or the volumetric flask itself is small (such as a 50mL volumetric flask), it is easy to lead the solution out of the bottle mouth when using a glass rod for drainage, or splash out, or accidentally dumped the small volumetric flask, causing various experimental errors.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a volumetric bottle drainage device, which can effectively avoid the situation that the solution is led out of the bottle mouth.

The solution of the utility model to solve the technical problem is: a volumetric flask drainage device, which includes a container and an extension part arranged at the bottom of the container, the extension part has a through hole, the through hole communicates with the container, and the extension part has a frosted outer wall.

When conducting chemical experiments, when volumetric flasks are used, glass rods are usually used for drainage. The drainage device can cooperate with the glass rod to complete the drainage process. The container of the drainage device increases the drainage area, which can prevent the liquid from overflowing due to unfamiliar operation, and makes the pipetting operation easier; the inner wall of the mouth of the volumetric flask has been frosted, and the extension has a frosted outer wall, and the extension is inserted into the volumetric flask When the mouth is closed, it can be closely matched with the mouth of the volumetric flask to prevent the solution from seeping out along the outer wall of the extension and avoid experimental errors.

As a further technical solution, the diameter of the through hole is greater than 0.5 cm.

The diameter of the through hole is larger than 0.5 cm, which can ensure the flow rate of the liquid and prevent the glass rod from blocking the through hole.

As a further technical solution, the container has a large top and a small bottom.

As a further technical solution, the container is in the shape of a truncated cone with a large upper bottom and a smaller lower bottom.

As a further technical solution, the extension part is cylindrical.

As a further technical solution, the extension part is cylindrical, and the area of the upper bottom surface of the extension part is equal to the area of the lower bottom surface of the container.

To sum up, the utility model has the advantages of simple structure and convenient operation, which simplifies the liquid pipetting operation and ensures the accuracy of the concentration of the prepared solution.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of another side of the utility model;

Fig. 3 is a diagram of the use status of the utility model.

Detailed ways

As shown in Figures 1 and 2, a volumetric flask drainage device includes a container 1 and an extension 2 arranged at the bottom of the container 1. The top of the container 1 is large and the bottom is small, and the extension 2 has a through hole 3. The through hole 3 The diameter is greater than 0.5 cm, the through hole 3 communicates with the container 1, and the extension part 2 has a frosted outer wall. The container 1 is in the shape of a truncated cone with a large upper bottom and a smaller lower bottom. The extension part 2 is cylindrical, and the area of the upper bottom of the extension part 2 is equal to the area of the lower bottom of the container 1 .

Fig. 3 has shown the use state of the present utility model, among the figure: 4 is a volumetric flask, 5 is a glass rod, and 6 is a beaker.

Claims (6)

1. A volumetric flask drainage device, characterized in that it comprises a container (1) and an extension (2) arranged at the bottom of the container (1), the extension (2) has a through hole (3), the through hole (3 ) communicates with the container (1), and the extension (2) has a frosted outer wall. 2. A volumetric flask drainage device according to claim 1, characterized in that: the diameter of the through hole (3) is greater than 0.5 cm. 3. A volumetric flask drainage device according to claim 1 or 2, characterized in that the container (1) has a large top and a small bottom. 4. A volumetric flask drainage device according to claim 3, characterized in that: the container (1) is in the shape of a truncated cone with a large upper bottom surface and a smaller lower bottom surface. 5. A volumetric flask drainage device according to claim 1 or 2, characterized in that: the extension part (2) is cylindrical. 6. A volumetric flask drainage device according to claim 4, characterized in that: the extension part (2) is cylindrical, and the area of the upper bottom surface of the extension part (2) is equal to the area of the lower bottom surface of the container (1) .

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