A burette

Abstract

The application relates to a burette for storing or circulating a titration solution, comprising a defoaming assembly and a burette, a rubber tube and a buret head which are sequentially communicated from top to bottom, the defoaming assembly is arranged in the buret head, the titration solution flows through the defoaming assembly, and the defoaming assembly is integrally formed with the buret head. The defoaming assembly and the buret head of the burette are integrally formed by a process, and the defoaming assembly cannot shake under the flow of the titration solution when the titration solution flows through the defoaming assembly, so that the defoaming efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of chemical technology, and in particular to a burette. Background Technology

[0002] A burette is a glass instrument used in titration analysis for holding and adding alkaline solutions. A burette consists of a dropper, a rubber tubing, and a burette head connected in sequence. The rubber tubing contains glass beads to control the dripping rate, allowing the liquid in the dropper to flow uniformly through the gap between the rubber tubing and the glass beads to the burette head.

[0003] During the use of an alkaline burette, air bubbles are generated when the liquid flows through the gap between the glass bead and the rubber tubing. The bursting of these bubbles causes the titrant to splash, and the titrant can easily overflow between the rubber tubing and the burette head, potentially burning the operator's hands. To prevent hand burns, defoaming components are often installed inside the burette head to eliminate air bubbles. However, existing defoaming components are placed directly inside the burette head, which can easily cause movement, resulting in poor defoaming effectiveness. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a burette that can improve the defoaming effect.

[0005] On one hand, this application provides a burette, including a defoaming component and a dropper, a rubber tube, and a burette head connected sequentially from top to bottom. The defoaming component is disposed inside the burette head, and the titration solution flows through the defoaming component. The defoaming component and the burette head are integrally formed.

[0006] In one embodiment of this application, the defoaming component includes a plurality of defoaming grids, which are filled radially within the titration head, and the plurality of defoaming grids are arranged axially along the titration head.

[0007] In one embodiment of this application, the defoaming assembly further includes a guide rod that extends axially along the titration head and is disposed on a plurality of the defoaming grids, with the axis of the guide rod coinciding with the axis of the defoaming grids.

[0008] In one embodiment of this application, the defoaming component further includes a first positioning ring disposed between the inner wall of the titration head and the defoaming grid.

[0009] In one embodiment of this application, the defoaming component further includes a second positioning ring, which is disposed between the outer edge of the guide rod and the defoaming grid.

[0010] In one embodiment of this application, the dropper is provided with a first cavity, the rubber tube is provided with a second cavity, and the titration head is provided with a third cavity. The first cavity, the second cavity, and the third cavity are connected in sequence. The top end of the dropper is provided with a solution inlet, which is connected to the first cavity. The bottom end of the titration head is provided with a solution outlet, which is connected to the third cavity.

[0011] In one embodiment of this application, a locking mechanism is provided between the dropper and the rubber tube, and / or, a locking mechanism is provided between the rubber tube and the dropper head.

[0012] In one embodiment of this application, the locking mechanism includes an annular clamp and a fastener, wherein the fastener cooperates with the annular clamp to lock the dropper to the rubber tube, and the fastener cooperates with the annular clamp to lock the rubber tube to the dropper head.

[0013] In one embodiment of this application, a sealing ring is provided between the dropper and the rubber tube, and / or, a sealing ring is provided between the rubber tube and the tip head.

[0014] In one embodiment of this application, the burette further includes a glass ball disposed inside the rubber tube. The glass ball and the rubber tube are interference-fitted, and a gap is formed between the rubber tube and the glass ball when the operator squeezes the rubber tube.

[0015] The technical solution described in this application has the following advantages over the prior art: In the burette described in this application, the defoaming component and the titration head are no longer connected by an assembly, but are made by an integral molding process. Therefore, when the titration solution flows through the defoaming component, the defoaming component will not shake under the flow of the titration solution, thus improving the defoaming efficiency. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the burette structure of this application; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a cross-sectional view of the burette of this application; Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle.

[0018] Explanation of reference numerals in the instruction manual: 1. Defoaming component; 2. Dropper; 3. Rubber tube; 4. Dropper head; 5. Defoaming grid; 6. Guide rod; 7. First positioning ring; 8. Second positioning ring; 9. First cavity; 10. Second cavity; 11. Third cavity; 12. Solution inlet; 13. Solution outlet; 14. Locking mechanism; 15. Ring clamp; 16. Fastener; 17. Sealing ring; 18. Glass bulb; 19. First connecting end; 20. Second connecting end; 21. Internal thread; 22. Handle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The burette of this application, such as Figure 1 As shown, it includes a dropper 2, a rubber tube 3, and a burette head 4. The dropper 2, rubber tube 3, and burette head 4 are connected sequentially from top to bottom. The titrant solution is injected from the top of the dropper 2, and the titrant solution flows downward in the dropper 2, rubber tube 3, and burette head 4 and flows out from the bottom of the burette head 4. Specifically, the dropper 2 has a first chamber 9, the rubber tube 3 has a second chamber 10, and the titration head 4 has a third chamber 11. The first chamber 9, the second chamber 10, and the third chamber 11 are connected in sequence. The top of the dropper 2 has a solution inlet 12, which is connected to the first chamber 9. The bottom of the titration head 4 has a solution outlet 13, which is connected to the third chamber 11. Therefore, the titration solution is injected into the first chamber 9 from the solution inlet 12 at the top of the dropper 2, and then flows from top to bottom through the first chamber 9, the second chamber 10, and the third chamber 11 in sequence. Finally, it flows out through the solution outlet 13 at the bottom of the titration head 4. The titration solution delivered to the titration head 4 by the rubber tube 3 gathers in the titration head 4 and drips out in the form of uniform droplets, ensuring the accuracy of the titration dosage.

[0021] The burette of this application also includes an antifoaming component 1, such as... Figure 3 and Figure 4As shown, the defoaming component 1 is disposed within the titration head 4, specifically within the third chamber 11. This allows the titration solution to flow through the defoaming component 1, eliminating air bubbles in the titration solution, improving the stability of the titration, preventing overflow of the titration solution between the rubber tube 3 and the titration head 4 when bubbles burst and splash, and preventing overflow between the rubber tube 3 and the dropper 2 when bubbles burst and splash. This also avoids the phenomenon of the titration solution burning the hands, and reduces the interference of air bubbles on the measurement of the titration volume, improving the accuracy of the titration volume. Notably, the defoaming component 1 and the titration head 4 are no longer connected by an assembly, but rather manufactured using a one-piece molding process. Therefore, when the titration solution flows through the defoaming component 1, the defoaming component 1 will not shake under the flow of the titration solution, improving the defoaming efficiency. In addition, both the titration head 4 and the defoaming component 1 are made of borosilicate glass in one piece. Borosilicate glass has excellent chemical stability and high temperature resistance, which can prevent it from being corroded by the titration solution and cracked due to temperature changes during the experiment, thus ensuring the safety of the titration solution storage and the accuracy of volume measurement.

[0022] Defoaming component 1 includes a defoaming grid 5 and a guide rod 6, such as Figure 3 and Figure 4 As shown, several defoaming grids 5 are provided, preferably four. All four defoaming grids 5 are arranged horizontally, with the axis of the titration head 4 along the vertical direction. The four defoaming grids 5 are arranged sequentially from top to bottom along the axial direction of the titration head 4. When the titration solution flows through the defoaming grids 5, the defoaming grids 5 break up air bubbles. This not only improves the stability of the solution titration and prevents the titration solution from overflowing between the rubber tube 3 and the titration head 4 when bubbles burst and splash, but also prevents the titration solution from overflowing between the rubber tube 3 and the dropper 2 when bubbles burst and splash, thus avoiding the phenomenon of the titration solution burning the hands, but also reduces the interference of air bubbles on the measurement of the titration volume, improving the titration accuracy. The guide rod 6 is cylindrical, and the bottom end of the guide rod 6 can be set as conical to facilitate the downward flow of the titration solution from the bottom of the guide rod 6. The axis of the guide rod 6 is vertical, and it coincides with the axis of the defoaming grid 5. Therefore, the guide rod 6 is positioned in the middle of the defoaming grid 5. The guide rod 6 guides the titration solution along a fixed path, ensuring the solution flows orderly through the defoaming grid 5 and preventing turbulent flow within the titration head 4 that generates more bubbles. This ensures a smooth titration and stable droplet descent, preventing splashing and burns to the hands. The titration head 4, defoaming grid 5, and guide rod 6 are integrally formed. Using 3D printing technology allows the defoaming grid 5 and guide rod 6 to be fixed within the titration head 4, preventing the defoaming assembly 1 from wobbling within the titration head 4 and improving defoaming efficiency.

[0023] like Figure 4As shown, the defoaming component 1 also includes a first positioning ring 7, which is disposed between the inner wall of the titration head 4 and the defoaming grid 5. The first positioning ring 7 enables the titration head 4 and the defoaming grid 5 to be integrally formed, and it also improves the connection stability between the defoaming grid 5 and the titration head 4. Figure 4 As shown, the defoaming component 1 also includes a second positioning ring 8, which is disposed between the outer edge of the guide rod 6 and the defoaming grid 5. The defoaming grid 5 and the guide rod 6 are integrally formed by the second positioning ring 8, and the second positioning ring can improve the connection stability between the defoaming grid 5 and the guide rod 6.

[0024] like Figure 3 and Figure 4 As shown, the burette of this application also includes a glass bulb 18, which is disposed inside the rubber tube 3. The connection between the glass bulb 18 and the rubber tube 3 allows for control of the flow of the titrant solution and the titration flow rate. The glass bulb 18 is made of borosilicate glass. The rubber tube 3 is used to transport the titrant solution. The rubber tube 3 is a flexible rubber tube made of nitrile rubber. Nitrile rubber has strong oil resistance and chemical corrosion resistance, making it less susceptible to corrosion by common titrant solutions. In addition, nitrile rubber has good elasticity and can quickly return to its original shape after being squeezed by the operator, facilitating precise control of the dripping speed of the titrant solution and making it easy for the operator to hold and squeeze. In its natural state, the glass bulb 18 and the rubber tube 3 are in an interference fit. The rubber tube 3 constrains the glass bulb 18 within the second cavity 10. Under the constraint of the rubber tube 3, the glass bulb 18 will not move up and down, ensuring that the glass bulb 18 is stably connected inside the rubber tube 3. The surface of the glass bulb 18 is smooth and fits tightly against the inner wall of the rubber tube 3, allowing the titrant solution to be stored above the glass bulb 18. When the operator squeezes the rubber tube 3, the rubber tube 3 undergoes elastic deformation, and a gap is formed between the elastically deformed rubber tube 3 and the glass bulb 18. The titration solution above the glass bulb 18 flows through the gap to the bottom of the glass bulb 18. When the operator releases the rubber tube 3, the rubber tube 3 returns to its natural state under the action of elasticity, closing the gap and achieving precise control of the titration solution flow rate.

[0025] like Figure 1 , Figure 2 and Figure 4As shown, a locking mechanism 14 is provided between the dropper 2 and the rubber tube 3, and / or, a locking mechanism 14 is provided between the rubber tube 3 and the titration head 4. That is, a locking mechanism 14 can be provided between the dropper 2 and the rubber tube 3, but not between the rubber tube 3 and the titration head 4; or a locking mechanism 14 can be provided between the rubber tube 3 and the titration head 4, but not between the dropper 2 and the rubber tube 3; or a locking mechanism 14 can be provided between the dropper 2 and the rubber tube 3, and also between the rubber tube 3 and the titration head 4. Preferably, providing a locking mechanism 14 between the rubber tube 3 and the titration head 4, and also between the dropper 2 and the rubber tube 3, can improve the locking stability between the rubber tube 3 and the dropper 2, and between the rubber tube 3 and the titration head 4. Specifically, as shown... Figure 2 As shown, the locking mechanism 14 includes an annular clamp 15 and a fastener 16. The fastener 16 is a locking bolt. The two ends of the annular clamp 15 form a first connecting end 19 and a second connecting end 20. The second connecting end 20 is provided with an internal thread 21. One end of the locking bolt is provided on the first connecting end 19, and the other end of the locking bolt is threadedly connected to the internal thread 21 on the second connecting end 20. In addition, a handle 22 is provided on the head of the locking bolt. The handle 22 drives the screw of the locking bolt to rotate, and the screw is threadedly connected to the internal thread 21. When the handle 22 drives the screw to rotate, the first connecting end 19 and the second connecting end 20 move closer to each other, so as to lock the dropper 2 and the rubber tube 3 together by the annular clamp 15, and to lock the rubber tube 3 and the titration head 4 together by the annular clamp 15. This prevents the rubber tube 3 and the dropper 2 from becoming loose when the rubber tube 3 is pressed, thus preventing the titration solution from overflowing. Alternatively, when the handle 22 drives the screw to rotate, the first connecting end 19 and the second connecting end 20 move further apart, so as to unlock the dropper 2 and the rubber tube 3, and to unlock the rubber tube 3 and the titration head 4. When the burette head 4 needs to be replaced or cleaned, rotate the handle 22. This rotates the screw, displacing the first connecting end 19 from the second connecting end 20, thereby unlocking the rubber tube 3 from the burette head 4. This allows the burette head 4 to be removed from the rubber tube 3 for cleaning or replacement. After cleaning or replacement, reinstall the burette head 4 onto the rubber tube 3. Then, rotate the handle 22 in the opposite direction to bring the first connecting end 19 and the second connecting end 20 closer together, locking the rubber tube 3 and burette head 4 in place. Furthermore, the tightness between the dropper 2 and the rubber tube 3, as well as the tightness between the rubber tube 3 and the burette head 4, can be adjusted using the handle 22.

[0026] A sealing ring 17 is provided between the dropper 2 and the rubber tube 3, and / or a sealing ring 17 is provided between the rubber tube 3 and the burette head 4. That is, a sealing ring 17 can be provided between the dropper 2 and the rubber tube 3, but not between the rubber tube 3 and the burette head 4; or, no sealing ring 17 is provided between the dropper 2 and the rubber tube 3, but a sealing ring 17 is provided between the rubber tube 3 and the burette head 4; or, a sealing ring 17 is provided between the dropper 2 and the rubber tube 3, and also between the rubber tube 3 and the burette head 4. Preferably, as... Figure 4 As shown, this application provides sealing rings 17 between the dropper 2 and the rubber tube 3, and also between the rubber tube 3 and the burette head 4. This improves sealing performance, preventing the titrant from overflowing between the dropper 2 and the rubber tube 3, and between the rubber tube 3 and the burette head 4. This effectively blocks leakage of the titrant from the connection gaps, ensuring the sealing of the titration process, guaranteeing accurate titration dosage, and preventing corrosion or contamination caused by titrant leakage. This also improves the safety of operators when using the burette. The sealing ring 17 is made of fluororubber, which has excellent high-temperature resistance and chemical corrosion resistance, maintaining good sealing performance in various harsh chemical environments. The two sealing rings 17 together form a double seal, completely eliminating titrant leakage. This ensures accurate titration dosage and prevents leaked titrant from causing corrosion damage to the lab bench or operators. The locking mechanism 14 can be provided corresponding to the sealing ring 17. When the locking mechanism 14 locks the rubber tube 3 to the dropper 2 and locks the rubber tube 3 to the tip head 4, the sealing performance of the sealing ring 17 is improved.

[0027] The dropper 2 is equipped with graduations to accurately hold and display the volume of the titration solution, so that the operator can inject the appropriate volume of titration solution into the dropper 2.

[0028] Specific workflow and principles: The titration solution is injected through the solution inlet 12 of the dropper 2 until the liquid level in the dropper 2 reaches the appropriate scale. At this time, the titration solution is stored in the first cavity 9 of the dropper 2 and the second cavity 10 of the rubber tube 3, which is located in the part of the cavity above the glass ball 18.

[0029] The operator squeezes the rubber tube 3, creating a gap between the rubber tube 3 and the glass bulb 18. The titrant solution above the glass bulb 18 flows downward through the gap into the titration head 4, which is the third chamber 11. Within the titration head 4, the titrant solution flows through the defoaming grid 5 and the guide rod 6. The guide rod 6 guides the titrant solution to flow smoothly downward within the titration head 4, preventing bubbles from forming due to turbulent flow. Simultaneously, multiple defoaming grids 5 break up and eliminate any bubbles that may be present in the titrant solution, preventing splashing. Furthermore, the sealing ring 17 prevents the titrant solution from overflowing between the rubber tube 3 and the titration head 4, and from overflowing between the rubber tube 3 and the dropper 2, thus avoiding burns to the palm. After defoaming, the titrant solution, under the converging action of the titration head 4, is dripped into the test solution in a uniform and stable droplet form, completing the titration operation.

[0030] It should be noted that the above are merely preferred embodiments and technical principles applied in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Under the circumstances of the concept and disclosed technical solutions of this application, other equivalent embodiments or equivalent technical means may also be included, all of which fall within the scope of protection of the claims of this application.

Claims

1. A burette for storing or circulating titration solutions, characterized in that: It includes a defoaming component (1) and a dropper (2), a rubber tube (3), and a titration head (4) connected sequentially from top to bottom. The defoaming component (1) is disposed inside the titration head (4), and the titration solution flows through the defoaming component (1). The defoaming component (1) and the titration head (4) are integrally formed.

2. The burette according to claim 1, characterized in that: The defoaming component (1) includes a plurality of defoaming grids (5), which are radially filled in the titration head (4) and are arranged axially along the titration head (4).

3. The burette according to claim 2, characterized in that: The defoaming component (1) further includes a guide rod (6), which extends axially along the titration head (4) and is disposed on a plurality of defoaming grids (5). The axis of the guide rod (6) coincides with the axis of the defoaming grids (5).

4. The burette according to claim 2, characterized in that: The defoaming component (1) further includes a first positioning ring (7), which is disposed between the inner wall of the titration head (4) and the defoaming grid (5).

5. The burette according to claim 3, characterized in that: The defoaming component (1) further includes a second positioning ring (8), which is disposed between the outer edge of the guide rod (6) and the defoaming grid (5).

6. The burette according to claim 1, characterized in that: The dropper (2) is provided with a first cavity (9), the rubber tube (3) is provided with a second cavity (10), and the titration head (4) is provided with a third cavity (11). The first cavity (9), the second cavity (10), and the third cavity (11) are connected in sequence. The top end of the dropper (2) is provided with a solution inlet (12), which is connected to the first cavity (9). The bottom end of the titration head (4) is provided with a solution outlet (13), which is connected to the third cavity (11).

7. The burette according to claim 1, characterized in that: A locking mechanism (14) is provided between the dropper (2) and the rubber tube (3), and / or, a locking mechanism (14) is provided between the rubber tube (3) and the dropper head (4).

8. The burette according to claim 7, characterized in that: The locking mechanism (14) includes an annular clamp (15) and a fastener (16). The fastener (16) cooperates with the annular clamp (15) to lock the dropper (2) and the rubber tube (3), and the fastener (16) cooperates with the annular clamp (15) to lock the rubber tube (3) and the dropper head (4).

9. The burette according to claim 1, characterized in that: A sealing ring (17) is provided between the dropper (2) and the rubber tube (3), and / or a sealing ring (17) is provided between the rubber tube (3) and the tip head (4).

10. The burette according to any one of claims 1-9, characterized in that: The burette also includes a glass ball (18), which is placed inside the rubber tube (3). The glass ball (18) and the rubber tube (3) are in an interference fit. When the operator squeezes the rubber tube (3), a gap is formed between the rubber tube (3) and the glass ball (18).

Images