Condenser tube assembly

Abstract

The application relates to the technical field of laboratory devices, and discloses a condenser tube assembly which comprises a condenser tube, the condenser tube comprising a sleeve and an upper end interface arranged at the front end of the sleeve; and a connecting head, the connecting head being provided with a main joint connected with the condenser tube, the main joint comprising a sealing part and an extension part connected with each other, the sealing part being tightly combined with the inner wall of the upper end interface, and the terminal end of the extension part extending into the sleeve. The condenser tube assembly reduces product accumulation, improves product collection rate, and avoids pollution of low-boiling-point components to subsequent components in a high-precision separation process.

Description

Technical Field

[0001] This application belongs to the field of laboratory equipment technology, and specifically relates to a condenser tube assembly. Background Technology

[0002] A condenser is a common laboratory condensation device, typically made of heat-resistant glass, and is a long, slender tubular structure that can be straight, spherical, or serpentine. Its structural feature is a double-layered structure: the inner tube serves as a gas passage for high-temperature steam, while the outer tube tightly fits around it, forming a sealed jacket. A cooling medium (most commonly tap water) flows within the jacket, liquefying the steam through heat exchange. This condenser can be used for reflux condensation to prevent solvent loss during reactions, or for distillation to collect pure fractions.

[0003] Currently, the diameter of the condenser tube connector is larger than the diameter of the condenser tube sleeve, forming a groove at the connection point. This presents at least two problems during the experiment: 1. Impact on Product Yield: In some chemical experiments, the product is often miscible with another component and exists in solution form. If the boiling points of the components differ, distillation can be used to separate the product. However, because a groove forms at the connection between the condenser fitting and the condenser sleeve, some condensate accumulates at this connection and cannot be collected. For experiments with low yields, where only a few grams of product are obtained per run, the material residue at the groove directly leads to a decrease in product yield and product loss.

[0004] 2. Affects product purity: In organic chemistry experiments, ethyl acetate is prepared by reacting acetic acid and ethanol with concentrated sulfuric acid as a catalyst. After the reaction, the crude product needs to be purified. To separate the byproducts diethyl ether and ethyl acetate, conventional distillation is typically used. Since the boiling point of diethyl ether is approximately 35°C, while that of ethyl acetate is 72-78°C, during distillation, the diethyl ether distills off first and liquefies in the condenser. This causes the diethyl ether distillate to accumulate in the conduit, preventing it from flowing into the subsequent receiving flask. When ethyl acetate distills off, it mixes with the accumulated diethyl ether distillate in the conduit, pooling together and flowing into the receiving flask used to collect the product. This prevents the separation of ethyl acetate and diethyl ether, resulting in contamination of the final product with diethyl ether and failing to achieve effective separation. In a continuous distillation process, the liquid accumulated in the conduit causes the lower-boiling-point product to contaminate the higher-boiling-point product, thus affecting product purity. Utility Model Content

[0005] The purpose of this application is to provide a condenser assembly designed to reduce product accumulation and improve product collection rate, as well as to avoid contamination of subsequent components by low-boiling-point components during high-precision separation.

[0006] To achieve the above objectives, this application provides a condenser assembly, the condenser assembly comprising: A condenser tube, the condenser tube including a sleeve and an upper end interface provided at the front end of the sleeve; The connector has a main connector for connecting to the condenser tube. The main connector includes a sealing part and an extension part connected to each other. The sealing part is tightly fitted to the inner wall of the upper interface, and the end of the extension part extends into the sleeve.

[0007] In some embodiments, the upper interface includes a connecting portion and a snap-fit ​​portion connected together, the sealing portion is tightly fitted to the inner wall of the snap-fit ​​portion, and the extension portion passes through the connecting portion and extends into the sleeve.

[0008] In some embodiments, the inner wall of the snap-fit ​​portion forms a first conical surface, and the outer wall of the sealing portion forms a second conical surface, the second conical surface being in close contact with the first conical surface.

[0009] In some embodiments, the first conical surface and the second conical surface are frosted surfaces.

[0010] In some embodiments, the connection between the connecting portion and the interior of the sleeve is achieved by a circular arc.

[0011] In some embodiments, the upper interface further includes a flange portion located at the front end of the snap-fit ​​portion.

[0012] In some embodiments, the end face of the extension is a plane or an inclined plane.

[0013] In some embodiments, the transition between the sealing portion and the extension portion is achieved by chamfering, and the transition between the connecting portion and the snap-fit ​​portion is achieved by chamfering.

[0014] In some embodiments, the condenser tube is a straight condenser tube.

[0015] In some embodiments, the connector is a 75° distillation elbow or a 75° distillation head.

[0016] This utility model's technical solution includes a condenser tube and a connector. By employing a connector with an extension that extends into the condenser tube sleeve, it effectively solves the technical problems in the prior art where condensate accumulates at the front groove of the condenser tube sleeve, reducing the yield of reaction products and contaminating subsequent components during high-precision separation. This achieves the technical effect of reducing product accumulation and improving product collection rate and purity.

[0017] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of the condenser tube assembly of this utility model; Figure 2 This is a schematic diagram showing the disassembled structure of an embodiment of the condenser tube assembly of this utility model; Figure 3 This is a partial cross-sectional schematic diagram of an embodiment of the condenser tube assembly of this utility model; Figure 4 This is a schematic diagram of another embodiment of the condenser tube assembly of this utility model; Figure 5 This is a schematic diagram showing the disassembled structure of another embodiment of the condenser tube assembly of this utility model; Figure 6 This is a partial cross-sectional schematic diagram of another embodiment of the condenser tube assembly of this utility model; Figure 7 This is a partial cross-sectional schematic diagram of an embodiment of the condenser tube of this utility model; Figure 8 This is a schematic diagram of the connection structure between the connector and the condenser in the prior art.

[0019] Explanation of reference numerals in the attached figures Detailed Implementation

[0020] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] like Figure 8 As shown, in the prior art, the condenser includes a condenser connector and a condenser sleeve. Different types of connectors are connected by inserting into the condenser connector. In order to accommodate the assembly of the connector, the diameter of the condenser connector is larger than the diameter of the condenser sleeve. The connection between the condenser connector and the condenser sleeve forms an annular end face. The condenser is tilted at a certain angle during use. Therefore, a groove is formed at the lower end of the connection. If the steam condenses before entering the condenser sleeve, the condensate will accumulate in the groove.

[0022] In some low-yield experiments, some products cannot be collected due to accumulation at the junction, resulting in significant waste. Similarly, in some purification experiments (not limited to ethyl acetate purification), if it is necessary to collect the middle fraction, the low-boiling-point components will accumulate condensate as they flow through the grooved area at the junction. Since the distillation process is continuous, when the target fraction to be collected passes through, it will inevitably be contaminated by the accumulation in the groove, leading to a decrease in product purity. Therefore, this problem should be avoided as much as possible, whether in low-yield experiments or experiments requiring high product purity.

[0023] Based on the above technical issues, such as Figures 1 to 7 As shown, this utility model proposes a condenser tube assembly 100. The main function of the condenser tube 10 is to realize the condensation of high-temperature steam. There are various types of connectors 20. The experimenter can flexibly select the corresponding connector 20 according to different needs such as reflux, distillation, and condensation and connect it to the condenser tube 10.

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the embodiment of this utility model, the condenser assembly 100 includes a condenser 10 and a connector 20. The condenser 10 includes a sleeve 11 and an upper interface 12 located at the front end of the sleeve 11. The connector 20 has a main connector 21 that connects to the condenser 10. The main connector 21 includes a sealing part 211 and an extension part 212 connected to each other. The sealing part 211 is tightly fitted to the inner wall of the upper interface 12, and the end of the extension part 212 extends into the sleeve 11.

[0026] Both the condenser tube 10 and the connector 20 are made of glass, such as borosilicate glass or quartz glass. The connector 20 is a one-piece molded structure. This application improves the main connector 21 of the connector 20 by adding an extension 212 that can extend into the sleeve 11 at the end of the connector 20 without changing the original connection method. The extension 212 is a circular tube structure, and its outer diameter is smaller than that of the sealing part 211. At the same time, the outer diameter of the extension 212 is also smaller than the inner diameter of the sleeve 11. When the extension 212 extends into the sleeve 11, the two are coaxially positioned. The length of the extension 212 extending into the sleeve 11 is 5mm to 10mm, which does not affect the condensation of steam. The end face of the extension 212 can be designed as a flat surface or a bevel as required. By providing an extension 212 that extends into the sleeve 11, the groove can be avoided, allowing steam to directly enter the sleeve 11 for condensation. Even if the steam condenses before entering the sleeve 11, the condensate will flow along the inner wall of the extension 212 and eventually enter the sleeve 11. The condensate in the sleeve 11 flows along the inner wall of the sleeve 11 to the outlet for collection, thus preventing the problem of condensate accumulation.

[0027] In this embodiment of the invention, in addition to improving the main connector 21 of the connector 20, the upper interface 12 of the condenser tube 10 is also improved. The upper interface 12 and the sleeve 11 are integrally formed. The upper interface 12 includes a connecting part 121 and a snap-fit ​​part 122. The sealing part 211 is tightly fitted to the inner wall of the snap-fit ​​part 122. The extension part 212 passes through the connecting part 121 and extends into the sleeve 11. The connecting part 121 is located outside the extension part 212. To ensure that the extension part 212 can be smoothly inserted into the sleeve 11, the fit between the connecting part 121 and the extension part 212 adopts a clearance fit. The connecting part 121 is a cylindrical structure. The extension part 212 and the connecting part 121 are coaxially arranged, and the single-sided gap between them is 2mm~4mm. The inner diameter of the connecting part 121 is designed to be slightly larger than the inner diameter of the sleeve 11. Its specific size is determined by the clearance fit required with the extension part 212. Therefore, the difference in inner diameter between the two can be minimized, and a smooth transition at the connection between the connecting part 121 and the inner connection of the sleeve 11 can be achieved by chamfering or rounding, thereby avoiding the formation of grooves.

[0028] like Figure 3 , Figure 6 and Figure 7 As shown, the snap-fit ​​portion 122 and the sealing portion 211 achieve a tight fit through a tapered engagement. The inner wall of the snap-fit ​​portion 122 forms a first tapered surface, and the outer wall of the sealing portion 211 forms a second tapered surface. During the process of the sealing portion 211 being inserted into the snap-fit ​​portion 122, this tapered design causes the contact area between the first tapered surface and the second tapered surface to gradually increase, and the two tapered surfaces will fit together evenly and tightly.

[0029] To further improve the sealing effect, the first and second conical surfaces are frosted. The frosting process creates numerous protrusions or depressions on the two conical surfaces, thereby increasing the effective contact area, blocking the flow channel, and thus achieving a seal.

[0030] like Figure 2 , Figure 3 , Figure 5 and Figure 6 and Figure 7 As shown, in an embodiment of this utility model, the upper interface 12 further includes a flange 123, which is located at the front end of the snap-fit ​​portion 122. It is understood that the sealing portion 211 and the snap-fit ​​portion 122 can achieve effective sealing through a tapered fit and a frosted surface. However, the large contact area due to the entire tapered frosted surface participating in the sealing can easily lead to tight engagement and prevent disassembly. Since both the connector 20 and the condenser tube 10 are made of glass with smooth surfaces, it is difficult to apply force to disassemble the connector 20 from the condenser tube 10 when engagement occurs. Therefore, this application provides a flange at the front end of the snap-fit ​​portion 122 to improve disassembly convenience. Force can be applied directly to the flange or a tool can be used to clamp the flange, both achieving rapid disassembly. Therefore, adding a flange can reduce the risk of engagement and better protect the connector 20 and the condenser tube 10.

[0031] In embodiments of this invention, the sealing portion 211 and the extension portion 212 are transitioned by a chamfer, as are the connecting portion 121 and the snap-fit ​​portion 122. This chamfer design can be either a rounded corner or a right angle. The chamfer design reduces fluid resistance, minimizes product residue, and also improves structural strength.

[0032] The condenser 10 in the above embodiment is a straight condenser, and the connector 20 in the above embodiment can be a 75° distillation elbow or a 75° distillation head, such as... Figure 1 , Figure 2 and Figure 3 The connector shown is a 75° distillation elbow. Figure 4 , Figure 5 and Figure 6 The connector shown is a 75° distillation head.

[0033] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A condenser tube assembly, characterized in that, The condenser assembly includes: The condenser (10) includes a sleeve (11) and an upper interface (12) located at the front end of the sleeve (11). The connector (20) has a main connector (21) that is connected to the condenser (10). The main connector (21) includes a sealing part (211) and an extension part (212) that are connected to each other. The sealing part (211) is tightly fitted to the inner wall of the upper interface (12), and the end of the extension part (212) extends into the sleeve (11).

2. The condenser tube assembly according to claim 1, characterized in that, The upper interface (12) includes a connecting part (121) and a snap-fit ​​part (122) connected to each other. The sealing part (211) is tightly fitted to the inner wall of the snap-fit ​​part (122). The extension part (212) passes through the connecting part (121) and extends into the sleeve (11).

3. The condenser tube assembly according to claim 2, characterized in that, The inner wall of the snap-fit ​​part (122) forms a first conical surface, and the outer wall of the sealing part (211) forms a second conical surface, the second conical surface being in close contact with the first conical surface.

4. The condenser assembly according to claim 3, characterized in that, The first and second conical surfaces are frosted surfaces.

5. The condenser tube assembly according to claim 2, characterized in that, The connection between the connecting part (121) and the inner connection of the sleeve (11) is achieved by a circular arc.

6. The condenser tube assembly according to claim 2, characterized in that, The upper interface (12) also includes a flange (123), which is located at the front end of the snap-fit ​​part (122).

7. The condenser tube assembly according to claim 1, characterized in that, The end face of the extension (212) is a plane or an inclined plane.

8. The condenser tube assembly according to claim 2, characterized in that, The sealing part (211) and the extension part (212) are transitioned by a chamfer, and the connecting part (121) and the snap-fit ​​part (122) are transitioned by a chamfer.

9. The condenser tube assembly according to any one of claims 1 to 8, characterized in that, The condenser tube (10) is a straight condenser tube.

10. The condenser tube assembly according to any one of claims 1 to 8, characterized in that, The connector (20) is a 75° distillation elbow or a 75° distillation head.

Images