A sealed liquid addition flask

Abstract

The utility model provides a kind of closed liquid-adding flask, with the characteristics of reasonable structure, strong sealing, liquid-adding stable and accurate control, wherein the integrated flask body and dropwise adding conduit eliminate steam leakage at interface, and the inclined steam outlet cooperates with the ground joint and sealing rubber ring to further strengthen the sealing property;The dropwise adding conduit end extends below liquid level and cooperates with buffer chamber, spiral flow control member and bevel design, significantly reduces the impact caused by liquid flow velocity, prevents splashing;Flow control cork and scale liquid-adding funnel synergistic effect, realize the visualization and high-precision flow control of liquid-adding process, to comprehensively improve experimental safety and reaction stability.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment, and in particular to a sealed liquid addition flask. Background Technology

[0002] In chemical experiments involving liquid reactions and heating, the two-necked flask is a common reaction vessel, widely used in organic synthesis, catalytic reactions, and solution heating. Traditionally, a separatory funnel is attached to one neck of the flask via a rubber stopper to allow for dropwise addition of liquid. These separatory funnels typically use standard ground glass joints or rubber stoppers to connect to the flask, and their structure generally includes a funnel body, an inner tube, and a manual stopcock valve (flow control cock). However, in practical applications, this structure has several inherent drawbacks. First, the sealing performance of the rubber stopper is significantly affected by temperature. When the flask is heated and internal vapor pressure is generated, vapor can easily escape from the gaps between the stopper and the neck or funnel tube. This not only causes the loss of volatile substances, affecting the balance of reactants and yield calculations, but may also release harmful gases, polluting the experimental environment and endangering the health of operators. Secondly, the internal seepage tube of a conventional separatory funnel typically does not extend below the liquid surface in the flask. When adding high-density or volatile liquids, the liquid flow directly impacts the liquid surface or bottom of the flask, easily causing violent splashing. This can lead to instability in the reaction system or excessively high local concentrations, thus affecting the selectivity and reproducibility of the reaction. Furthermore, the flow rate is difficult to control, and an excessively fast flow rate further increases the risk of splashing. In addition, the liquid addition process relies on manual adjustment of the stopcock opening to control the flow rate, lacking precise quantitative capabilities. Especially in long-term or multi-batch liquid addition experiments, operational consistency is poor, easily introducing human error and limiting the controllability and automation level of the experiment.

[0003] Therefore, there is an urgent need in this field to develop a new type of sealed liquid addition flask that can fundamentally improve sealing performance, avoid liquid splashing, and achieve more precise fluid control in order to meet the higher requirements of modern chemical experiments for safety, repeatability, and environmental friendliness. Utility Model Content

[0004] The purpose of this invention is to provide a sealed liquid addition flask to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a sealed liquid addition flask, comprising: A liquid addition funnel, wherein the top of the liquid addition funnel is provided with a liquid addition port, and the bottom of the liquid addition funnel is provided with a dripping conduit, and the liquid addition port and the dripping conduit are arranged vertically opposite to each other; The flask body is fixed below the liquid addition funnel and is integrally formed with the side wall of the dropping tube, the end of the dropping tube extending into the flask body; A flow control cock is disposed on the side of the dropping tube and located above the flask body; A steam outlet is provided at an angle on the upper part of the flask body.

[0006] Preferably, the liquid addition funnel is pear-shaped or spherical, and the flask body is spherical.

[0007] Preferably, the side wall of the liquid addition funnel is provided with volume graduations.

[0008] Preferably, the dripping conduit is provided with a spiral flow slowing element, which is located below the flow control cock.

[0009] Preferably, the spiral flow-retarding component includes a support column, both ends of which are provided with tapered guide heads, and the sidewall of the support column is spirally provided with multiple flexible guide plates, the flexible guide plates being interference-fitted with the inner sidewall of the dripping conduit.

[0010] Preferably, a buffer cavity is provided between the flow control cock and the spiral flow slowing element.

[0011] Preferably, the end of the dripping conduit is provided with an oblique opening.

[0012] Preferably, the side of the flask body is provided with an anti-slip gasket.

[0013] Preferably, the steam outlet is equipped with a ground joint.

[0014] Preferably, a sealing ring is provided at the ground joint.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides a sealed liquid addition flask with a reasonable structure, strong sealing performance, stable liquid addition, and precise control. The one-piece molded flask body and the dropping tube eliminate vapor leakage at the interface. The inclined vapor outlet, combined with the ground glass joint and sealing ring, further enhances the airtightness. The end of the dropping tube extends below the liquid surface and, together with the buffer chamber, spiral flow modifier, and beveled design, significantly reduces the impact of liquid flow velocity and prevents splashing. The flow control cock and the graduated liquid addition funnel work together to achieve visualization of the liquid addition process and high-precision flow control, thereby comprehensively improving experimental safety and reaction stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a sealed liquid addition flask provided by this utility model; Figure 2 A schematic diagram of a spiral flow-retarding element in a sealed liquid-addition flask provided by this utility model. Detailed Implementation

[0018] Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The purpose of this invention is to provide a sealed liquid addition flask to solve the problems existing in the prior art.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: like Figure 1 As shown, the sealed liquid addition flask of this embodiment mainly includes key components such as a liquid addition funnel 1, a flask body 2, a flow control cock 3, a vapor outlet 4, and a dropping tube 5. The liquid addition funnel 1 has a pear-shaped structure, with a liquid addition port 11 at the top and a dropping tube 5 at the bottom. The liquid addition port 11 and the dropping tube 5 are vertically opposite each other to ensure smooth liquid flow under gravity. The side wall of the liquid addition funnel 1 is provided with volume graduations 12, which facilitates the experimenter to observe the liquid volume in real time and achieve quantitative control.

[0024] Specifically, the flask body 2 has a spherical structure, is fixed below the addition funnel 1, and is integrally formed with the side wall of the dropping tube 5. This integrated structure fundamentally eliminates the gap problem existing at the connection between the traditional separating funnel and the flask, significantly improves the sealing performance, avoids the loss of volatile substances and the escape of harmful gases due to vapor leakage, and ensures the safety of the experimental environment and the accuracy of experimental data.

[0025] Furthermore, the end of the dropping conduit 5 extends into the interior of the flask body 2 and is provided with an angled opening 51, allowing the liquid to flow smoothly into the reaction system, avoiding direct impact on the liquid surface or bottom of the flask, thereby effectively preventing splashing. The dropping conduit 5 is equipped with a spiral flow-retarding element 6, which is located below the flow control cock 3, such as... Figure 2 As shown, the device includes a support column 61, with tapered guide heads 62 at both ends. Multiple flexible guide vanes 63 are spirally arranged on the sidewalls of the support column 61. These flexible guide vanes 63 are interference-fitted with the inner wall of the dripping conduit 5, forming a tight contact. When the liquid flows through the spiral flow buffer 6, it forms a spiral flow path under the guidance of the flexible guide vanes 63, effectively slowing the flow velocity, further reducing the impact force of the liquid flow, and improving the stability of the liquid addition process.

[0026] Furthermore, the flow control cock 3 is located on the side of the dropping tube 5 and above the flask body 2, and is used to regulate the liquid flow rate. A buffer chamber 7 is provided between the flow control cock 3 and the spiral flow slowing element 6. The presence of the buffer chamber 7 provides a brief residence space for the liquid, making the flow rate regulation more sensitive and precise, especially suitable for experimental scenarios with strict requirements on the liquid addition rate.

[0027] Furthermore, the steam outlet 4 is inclinedly located on the upper part of the flask body 2, and its outlet end is equipped with a ground glass joint 41. The ground glass joint 41 is equipped with a sealing ring 42, which can be tightly connected to other experimental equipment such as condenser tubes and gas absorption devices to ensure the airtightness of the entire reaction system, prevent the leakage of steam generated during the reaction process, and further improve the safety and environmental protection of the experiment.

[0028] Furthermore, the side of the flask body 2 is provided with anti-slip pads 21, which facilitates stable support with the support during operation, prevents slippage, and improves the safety and convenience of operation.

[0029] In practical use, the experimenter first adds the reaction solvent or initial material to the flask body 2, and then pours the liquid to be added into the addition funnel 1 through the addition port 11. By observing the volume scale 12, the total amount of liquid added can be precisely controlled. Subsequently, the flow control cock 3 is slowly opened, and the liquid flows through the buffer chamber 7 and the spiral flow slowing device 6 under the action of gravity. The flow rate is effectively slowed down and a stable flow pattern is formed. Finally, it flows smoothly into the flask body 2 below the liquid surface through the inclined port 51, avoiding splashing and local excessive concentration. Throughout the liquid addition process, the vapor generated inside the flask is discharged through the vapor outlet 4 and condensed or absorbed by the external device connected to the ground glass joint 41, ensuring that the system is sealed and leak-free.

[0030] In summary, this utility model achieves high sealing performance, high stability, and high controllability in the liquid addition process through the synergistic effect of multiple technical means, including integrated structural design, spiral flow control component, buffer chamber, oblique conduit, and high-sealing interface. It significantly improves the safety, repeatability, and automation level of chemical experiments and has good prospects for widespread application.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0033] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A sealed liquid addition flask, characterized in that: include: A liquid addition funnel, wherein the top of the liquid addition funnel is provided with a liquid addition port, and the bottom of the liquid addition funnel is provided with a dripping conduit, and the liquid addition port and the dripping conduit are arranged vertically opposite to each other; The flask body is fixed below the liquid addition funnel and is integrally formed with the side wall of the dropping tube, the end of the dropping tube extending into the flask body; A flow control cock is disposed on the side of the dropping tube and located above the flask body; A steam outlet is provided at an angle on the upper part of the flask body.

2. The sealed liquid addition flask according to claim 1, characterized in that: The liquid addition funnel has a pear-shaped or spherical structure, and the flask body has a spherical structure.

3. The sealed liquid addition flask according to claim 1, characterized in that: The side wall of the liquid addition funnel is provided with volume graduations.

4. The sealed liquid addition flask according to claim 1, characterized in that: The drip inlet tube is equipped with a spiral flow slowing element, which is located below the flow control cock.

5. The sealed liquid addition flask according to claim 4, characterized in that: The spiral flow control component includes a support column, both ends of which are provided with tapered guide heads. The sidewall of the support column is spirally provided with multiple flexible guide plates, which are interference-fitted with the inner sidewall of the dripping conduit.

6. The sealed liquid addition flask according to claim 4, characterized in that: A buffer cavity is provided between the flow control cock and the spiral flow slowing element.

7. The sealed liquid addition flask according to claim 1, characterized in that: The end of the dripping conduit is provided with an oblique opening.

8. The sealed liquid addition flask according to claim 1, characterized in that: The side of the flask body is provided with anti-slip pads.

9. The sealed liquid addition flask according to claim 1, characterized in that: The steam outlet is equipped with a ground joint.

10. The sealed liquid addition flask according to claim 9, characterized in that: The ground joint is equipped with a sealing ring.

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