Large-volume constant-speed liquid dropping device

Abstract

This utility model relates to the field of dripping device technology, specifically to a large-volume constant-rate dripping device. The device includes a dripping funnel, a connecting tube, and a storage tank. The dripping funnel comprises a funnel body and a dripping tube connected to the bottom of the funnel body. The top of the funnel body has an inlet, and the bottom side has a replenishment port. A stopper is provided on the inlet. The replenishment port is connected to an outlet on the lower side of the storage tank via the connecting tube. The storage tank is located above the replenishment port, and the vertical distance H between the bottom of the storage tank and the replenishment port is 1. A knob is provided on the dripping tube. Using this large-volume constant-rate dripping device, in practical applications, it can overcome the shortcomings of current dripping funnels, such as uneven dripping rate and low capacity, thereby improving the uniformity of chemical reactions, ensuring the controllability of the reaction, and enhancing the repeatability, accuracy, and efficiency of experiments.

Description

Technical Field

[0001] This utility model relates to the field of dripping device technology, specifically to a large-volume constant-rate dripping device. Background Technology

[0002] For some chemical reactions that require heating and have poor airtightness, solvent may evaporate as the reaction proceeds, resulting in solvent loss within the reaction system. This can alter the reactant concentrations, leading to unexpected changes and potentially uncontrollable variations in the reaction process. Therefore, researchers need to replenish the solvent or use a constant-pressure dropping funnel. However, commonly used constant-pressure dropping funnels are connected to the atmosphere via a side tube. The rate at which the reaction liquid drips depends primarily on the liquid pressure created by the remaining liquid level in the funnel. As the liquid level decreases, the dripping slows, causing uneven reaction and requiring researchers to adjust the dripping rate. Furthermore, most commonly used laboratory dropping funnels are low-volume, capable of adding only tens of milliliters of liquid. For chemical reactions requiring the addition of hundreds of milliliters of emulsion, large-capacity dropping funnels must be purchased, resulting in unnecessary resource waste.

[0003] Therefore, there is an urgent need for a large-volume, constant-rate dripping device to solve the problems of uneven dripping rate and low capacity of current dripping funnels, improve the uniformity of chemical reactions, ensure the controllability of the reaction, improve the repeatability and accuracy of experiments, reduce the labor intensity of experimental operators, and improve the work efficiency of the laboratory. Utility Model Content

[0004] The purpose of this invention is to solve the problems of uneven dripping rate and low capacity in existing dropping funnels during chemical experiments, and to provide a large-volume constant-rate dripping device.

[0005] The technical solution of this utility model is as follows:

[0006] A large-volume constant-rate dripping device includes a dripping funnel, a connecting pipe, and a liquid storage tank;

[0007] The dripping funnel includes a funnel body and a dripping tube connected to the bottom of the funnel body. The top of the funnel body is provided with a liquid inlet, and the bottom side is provided with a liquid replenishment port. The liquid inlet is provided with a plug. The liquid replenishment port is connected to the liquid outlet on the lower side of the liquid storage tank through a connecting tube. The liquid storage tank is located above the liquid replenishment port, and the vertical distance between the bottom of the liquid storage tank and the liquid replenishment port is H. The dripping tube is provided with a knob.

[0008] Preferably, H is 20cm-40cm.

[0009] Preferably, the liquid storage height h in the storage tank is 1cm-5cm.

[0010] Preferably, the bottom of the storage tank is provided with a ramp to guide the liquid in the storage tank to the outlet.

[0011] Preferably, the slope angle of the ramp is 0.5°-1.5°.

[0012] Preferably, the liquid storage tank is positioned above the liquid replenishment port via a platform, which is a lifting platform.

[0013] Preferably, a switch is provided on the connecting pipe.

[0014] Preferably, the device also includes a dropper stopper, through which the dropper tube is connected to the reaction vessel. The dropper stopper is made of glass, with a smooth inner surface and a frosted outer surface.

[0015] Preferably, the funnel body and the drip tube are integrally formed.

[0016] Preferably, the stopper is a rubber stopper, the drip funnel is made of glass with smooth inner and outer surfaces, the knob is made of polytetrafluoroethylene, and the connecting tube is a latex tube.

[0017] According to the above technical solution, based on this large-volume constant-rate dripping device, an inlet is provided at the top of the funnel body, and a replenishment port is provided on the bottom side. A plug is provided on the inlet, and the replenishment port is connected to the outlet on the lower side of the storage tank through a connecting pipe. The storage tank is located above the replenishment port, and a knob is provided on the dripping tube. In practical applications, this device can effectively solve the problems of uneven dripping speed and low capacity of current dripping funnels, improve the uniformity of chemical reactions, ensure the controllability of the reaction, improve the repeatability and accuracy of experiments, reduce the labor intensity of experimental operators, and improve the work efficiency of the laboratory. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a large-volume constant-rate dripping device;

[0019] Figure 2 This is a schematic diagram of a high-volume, constant-rate dripping device with height markings.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Stopper; 2. Dropping funnel; 21. Funnel body; 22. Dropping tube; 3. Knob; 4. Dropper stopper; 5. Reaction vessel; 6. Refill port; 7. Connecting tube; 8. Stage; 9. Inclined platform; 10. Storage tank; 11. Outlet. Detailed Implementation

[0022] The following provides a detailed description of the specific embodiments of this utility model. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0023] In the description of this application, the term "comprising" and any variations thereof are meant to mean non-exclusively including, possibly including, or adding one or more other features, units, components and / or combinations thereof.

[0024] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] This invention provides a large-volume, constant-rate dripping device, such as... Figure 1-2 As shown, the large-volume constant-rate dripping device includes a dripping funnel 2, a connecting pipe 7, and a liquid storage tank 10.

[0026] The dripping funnel 2 includes a funnel body 21 and a dripping tube 22 connected to the bottom of the funnel body 21. The top of the funnel body 21 is provided with a liquid inlet, and the bottom side is provided with a liquid replenishment port 6. The liquid inlet is provided with a stopper 1. The liquid replenishment port 6 is connected to the liquid outlet 11 on the lower side of the liquid storage tank 10 through a connecting tube 7. The liquid storage tank 10 is located above the liquid replenishment port 6, and the vertical distance between the bottom of the liquid storage tank 10 and the liquid replenishment port 6 is H. The dripping tube 22 is provided with a knob 3.

[0027] According to the above technical solution, based on this large-volume constant-rate dripping device, in practical applications, it can effectively solve the problems of uneven dripping rate and low capacity of current dripping funnels, improve the uniformity of chemical reactions, ensure the controllability of the reaction, improve the repeatability and accuracy of experiments, reduce the labor intensity of experimental operators, and improve the work efficiency of the laboratory.

[0028] In the large-volume constant-rate dripping device described in this utility model, preferably, H is 20cm-40cm. By setting the vertical distance between the bottom of the storage tank 10 and the replenishment port 6, the liquid level in the storage tank 10 can be made level with the liquid level in the dripping funnel 2, thereby maintaining the liquid surface pressure balance between the storage tank end and the dripping funnel end during the dripping process of the dripping funnel 2, realizing automatic liquid replenishment, and ensuring the uniformity of liquid replenishment.

[0029] More preferably, the liquid height h in the liquid storage tank 10 is 1cm-5cm. More preferably, the liquid height h in the liquid storage tank 10 is 3cm-5cm, that is, h is much smaller than H, so as to avoid the pressure change caused by the drop in liquid height in the liquid storage tank 10 affecting the dripping rate of the dripping funnel 2.

[0030] In one specific embodiment, the vertical distance H between the bottom of the liquid storage tank 10 and the liquid replenishment port 6 is 30cm. The liquid storage tank 10 can be any kind of large-capacity, low-height liquid storage container. For example, it can be a cylinder with a diameter D of 15cm-25cm and a height L of 4cm-6cm, where the diameter D is 5-7 times the height L, and the capacity is between 200ml and 2500ml. This meets the needs of large-dose droplet chemical experiments and maintains the liquid surface pressure balance between the liquid storage tank end and the droplet funnel end during the droplet process, thereby achieving automatic liquid replenishment and ensuring the uniformity of liquid replenishment.

[0031] In the large-volume constant-rate dripping device of this utility model, preferably, a ramp 9 is provided at the bottom of the inner part of the storage tank 10 to guide the liquid in the storage tank 10 to the outlet 11. By creating a physical low point inside the storage tank, the reaction liquid in the storage tank can be fully discharged. More preferably, the ramp angle of the ramp 9 is 0.5°-1.5°, preferably 0.8°-1.2°, and most preferably 1°, so that the reaction liquid in the storage tank can be discharged more fully without affecting the internal volume of the storage tank. Specifically, the ramp 9 is made of glass.

[0032] In the large-volume constant-rate dripping device of this utility model, preferably, the liquid storage tank 10 is set above the liquid replenishment port 6 via a platform 8. The platform 8 is a lifting platform or a pad, preferably a lifting platform, so that the liquid storage tank 10 can be set at any height above the liquid replenishment port 6 according to actual needs.

[0033] In the large-volume constant-rate dripping device of this utility model, preferably, a switch is provided on the connecting pipe 7 to control the connection and disconnection between the liquid storage tank 10 and the dripping funnel 2. In a specific embodiment, when the connecting pipe 7 is a latex tube, the switch can be a clamp, thereby facilitating the collection and use of materials in the laboratory.

[0034] In the large-volume constant-rate dripping device of this utility model, preferably, it further includes a dropper stopper 4. The dripping tube 22 is connected to the reaction vessel 5 through the dropper stopper 4. The dropper stopper 4 is made of glass, with a smooth inner surface and a frosted outer surface, thus facilitating its use with other reaction vessels 5. However, it is not absolutely sealed to ensure that the reaction liquid can drip smoothly. Specifically, the outer diameter of the dropper stopper 4 is 2.3 cm. The inner diameter of the reaction vessel 5 is 2.4 cm.

[0035] In the large-volume constant-rate dripping device of this utility model, preferably, the funnel body 21 and the dripping tube 22 are integrally formed.

[0036] In the large-volume constant-rate dripping device of this invention, preferably, the stopper 1 is a rubber stopper, which facilitates the insertion and removal of the stopper and ensures that a sealed air space can be formed above the liquid surface of the funnel body 21. In another preferred embodiment, the dripping funnel 2 is made of glass with smooth inner and outer surfaces, thereby preventing the reaction liquid from adhering to the walls. Specifically, the radius of the main body of the dripping funnel 2 is 2.5 cm, and the total length is approximately 40 cm-50 cm. In another preferred embodiment, the knob 3 is made of tetrafluoroethylene, and the opening size is the same as that of the dripping tube 22, allowing the dripping rate of the reaction liquid to be controlled by adjusting the opening.

[0037] The working principle and usage procedure of the large-volume constant-rate dripping device described in this utility model are as follows: See Figure 1 and Figure 2 Turn off knob 3 and turn on the switch on connecting pipe 7. Add liquid to the storage tank 10 to the required amount. Make the liquid level in the dropping funnel 2 as h2 as needed. This liquid level is the vertical height from the liquid level in the dropping funnel 2 to knob 3. Adjust the height of the platform 8 and make the liquid level in the storage tank 10 level with the liquid level in the dropping funnel 2, i.e., H+h+h1=h2. The liquid inlet 6 of the dropping funnel 2 and the liquid outlet 11 of the storage tank 10 are connected by the connecting pipe 7 to form a communicating vessel. The liquid level in the dropping funnel 2 and the liquid level in the storage tank 10 are the same height and both are at one atmosphere.

[0038] Tighten the stopper 1. At this point, the pressure of the sealed gas inside the dripping funnel 2 is P0, and the liquid level in the dripping funnel 2 is the same as the liquid level in the storage tank 10, with equal gas pressure (one atmosphere) on both liquid surfaces. Adjust the knob 3 to the desired dripping speed. At this time, the liquid level in the dripping funnel 2 drops under gravity. During this process, due to the sealed space between the stopper 1 and the liquid surface, the gas volume in the sealed space increases and the pressure decreases, i.e., during the dripping process, P... 气<P0, thus the liquid in the liquid storage tank 10 continuously and uniformly enters the drip funnel 2 through the connecting pipe 7 under the action of the air pressure difference to maintain the liquid level height in the liquid storage tank 10 flush with the liquid level in the drip funnel 2 (i.e., the liquid levels of both are always in an equal air pressure equilibrium state). By controlling the opening degree of the control knob 3, the drip rate of the liquid in the drip funnel 2 can be adjusted. The drip rate mainly depends on the opening degree of the knob 3 and the liquid level height in the drip funnel 2. That is, when the opening degree of the knob 3 is fixed, the liquid in the drip funnel 2 always drips at a constant speed under the conditions of equal pressure and equal liquid height.

[0039] The vertical distance between the stage 8 and the liquid replenishment port 6 is H, where 20 cm ≤ H ≤ 40 cm. The slope angle of the slope stage 9 is 1°. The liquid storage tank 10 is a cylinder with a diameter D of 15 cm - 25 cm and a height L of 4 cm - 6 cm, and the diameter D is 5 - 7 times the height L. The liquid level height in the liquid storage tank 10 is h, which is 3 cm - 5 cm. Thus, according to different drip volume requirements, with the specific drip volume approximately between 200 ml - 2500 ml, it can be ensured that h << H, and the change in the liquid level height in the drip funnel 2 caused by the change in h can be ignored. Therefore, the drip rate mainly depends on the opening degree of the knob 3.

[0040] When all the reaction liquid in the liquid storage tank 10 has flowed out, open the plug 1 to allow the remaining reaction liquid in the drip funnel 2 to drip naturally. At this time, although the dripping reaction liquid is not relatively uniform in speed, the proportion of this part of the reaction liquid in the total amount is relatively small and can be ignored. Of course, this part of the reaction liquid can also not be dripped into the reaction vessel 5.

[0041] The present utility model will be described in detail below through embodiments, but the protection scope of the present utility model is not limited thereto.

[0042] Embodiment 1

[0043] Adopt the large liquid volume constant speed drip device as shown in Figure 1-2 to implement. Specifically, the large liquid volume constant speed drip device includes a drip funnel 2, a connecting pipe 7, and a liquid storage tank 10;

[0044] The drip funnel 2 includes a funnel main body 21 and a drip pipe 22 connected to the bottom of the funnel main body 21. The top of the funnel main body 21 is provided with a liquid inlet, and the side of the bottom is provided with a liquid replenishment port 6. A plug 1 is provided on the liquid inlet. The liquid replenishment port 6 is connected to the liquid outlet 11 on the lower side of the liquid storage tank 10 through the connecting pipe 7. The liquid storage tank 10 is located above the liquid replenishment port 6, and the vertical distance between the bottom of the liquid storage tank 10 and the liquid replenishment port 6 is H. A knob 3 is provided on the drip pipe 22;

[0045] Specifically, H is 20 cm, the liquid storage tank 10 is a cylinder with a diameter D of 16 cm and a height L of 5 cm, and the maximum capacity is 500 ml; the liquid storage tank 10 is arranged above the liquid replenishing port 6 through the carrier 8, and the carrier 8 is a lifting platform; a switch member is arranged on the connecting pipe 7; further includes a dropper plug 4, the dropper pipe 22 is connected to the reaction vessel 5 through the dropper plug 4, the dropper plug 4 is made of glass, and its inner surface is a smooth surface and the outer surface is a frosted surface; the funnel main body 21 and the dropper pipe 22 are integrally formed; the plug 1 is a rubber plug, the dropper funnel 2 is made of glass and both the inner and outer surfaces are smooth surfaces, the knob 3 is made of tetrafluoroethylene, and the connecting pipe 7 is a latex tube.

[0046] In practical applications, close the knob 3 and open the switch member on the connecting pipe 7, add liquid to the required amount in the liquid storage tank 10, make the liquid level height in the dropper funnel 2 be h2 as needed, this liquid level height is the vertical height from the liquid surface in the dropper funnel 2 to the knob 3, adjust the height of the carrier 8, and make the liquid level height in the liquid storage tank 10 be flush with the liquid level in the dropper funnel 2, that is, H + h + h1 = h2, tighten the plug 1, at this time the pressure of the sealed gas in the dropper funnel 2 is P0, and the liquid level height in the dropper funnel 2 is equal to the liquid level height in the liquid storage tank 10, and the air pressures received by both liquid surfaces are equal (both are one atmospheric pressure); control the opening and closing degree of the knob 3 to the required dropping speed. At this time, the liquid in the dropper funnel 2 drops under the action of gravity, and during this process, due to the existence of a sealed space between the plug 1 and the liquid surface, the volume of the gas in the sealed space becomes larger and the pressure becomes smaller, that is, during the dropping process P 气 < P0, so the liquid in the liquid storage tank 10 continuously and evenly replenishes and enters the dropper funnel 2 under the action of the pressure difference through the connecting pipe 7 to maintain the liquid level height in the liquid storage tank 10 to be flush with the liquid level in the dropper funnel 2 (that is, the liquid levels of both are always in an equal air pressure equilibrium state). By controlling the opening and closing degree of the knob 3, the dropping speed of the liquid in the dropper funnel 2 can be adjusted until all the liquid in the liquid storage tank 10 flows into the reaction vessel 5, and then open the plug 1 to make the remaining reaction liquid in the dropper funnel 2 drip naturally.

[0047] After testing, using the large liquid volume constant speed dropping device described in the present invention, compared with the dropping funnels with uneven dropping speed and low capacity in the prior art, in practical applications, it can improve the uniformity of chemical reactions, ensure the controllability of reaction progress, improve the repeatability and accuracy of experiments, reduce the labor intensity of experimental operators, and improve the working efficiency of the laboratory.

[0048] Embodiment 2

[0049] The implementation follows the same procedure as Embodiment 1, except that the bottom of the liquid storage tank 10 is provided with a ramp 9 for guiding the liquid in the liquid storage tank 10 to the outlet 11; the ramp angle of the ramp 9 is 1°.

[0050] Testing revealed that, compared to the solution in Example 1, the large-volume constant-rate dripping device described in this invention can more quickly and effectively guide the reaction liquid in the storage tank to the outlet, thereby avoiding reaction liquid residue in the storage tank based on the physical low point.

[0051] The large-volume constant-rate dripping device provided by this utility model has a liquid inlet at the top of the funnel body and a liquid replenishment port on the bottom side. The liquid inlet is equipped with a plug, and the liquid replenishment port is connected to the liquid outlet on the lower side of the storage tank through a connecting pipe. The storage tank is located above the liquid replenishment port, and the dripping tube is equipped with a knob. In practical applications, it can effectively solve the problems of uneven dripping rate and low capacity of current dripping funnels, improve the uniformity of chemical reactions, ensure the controllability of reaction, improve the repeatability and accuracy of experiments, reduce the labor intensity of experimental operators, and improve the work efficiency of the laboratory.

[0052] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed by this utility model and all fall within the protection scope of this utility model.

Claims

1. A large-volume, constant-rate dripping device, characterized in that, The large-volume constant-rate dripping device includes a dripping funnel (2), a connecting pipe (7), and a storage tank (10); The dripping funnel (2) includes a funnel body (21) and a dripping tube (22) connected to the bottom of the funnel body (21). The top of the funnel body (21) is provided with a liquid inlet and the bottom side is provided with a liquid replenishment port (6). The liquid inlet is provided with a plug (1). The liquid replenishment port (6) is connected to the liquid outlet (11) on the lower side of the liquid storage tank (10) through a connecting tube (7). The liquid storage tank (10) is located above the liquid replenishment port (6), and the vertical distance between the bottom of the liquid storage tank (10) and the liquid replenishment port (6) is H. The dripping tube (22) is provided with a knob (3).

2. The large-volume constant-rate dripping device according to claim 1, characterized in that, H is 20cm-40cm.

3. The large-volume constant-rate dripping device according to claim 2, characterized in that, The liquid storage height h in the storage tank (10) is 1cm-5cm.

4. The large-volume constant-rate dripping device according to claim 1, characterized in that, The bottom of the storage tank (10) is provided with a ramp (9) for guiding the liquid in the storage tank (10) to the outlet (11).

5. The large-volume constant-rate dripping device according to claim 4, characterized in that, The slope angle of the ramp (9) is 0.5°-1.5°.

6. The large-volume constant-rate dripping device according to claim 1, characterized in that, The liquid storage tank (10) is positioned above the liquid replenishment port (6) via a platform (8), which is a lifting platform.

7. The large-volume constant-rate dripping device according to claim 1, characterized in that, A switch is provided on the connecting pipe (7).

8. The large-volume constant-rate dripping device according to claim 1, characterized in that, It also includes a dropper stopper (4), through which the dropper tube (22) is connected to the reaction vessel (5). The dropper stopper (4) is made of glass, with a smooth inner surface and a frosted outer surface.

9. The large-volume constant-rate dripping device according to claim 1, characterized in that, The funnel body (21) and the drip tube (22) are integrally formed.

10. The large-volume constant-rate dripping device according to any one of claims 1-9, characterized in that, The stopper (1) is a rubber stopper, the drip funnel (2) is made of glass and has smooth inner and outer surfaces, the knob (3) is made of tetrafluoroethylene, and the connecting tube (7) is a latex tube.

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