T-shaped reaction tube convenient for controlling phenol nitration reaction progress

Abstract

The utility model discloses a T-shaped reaction tube convenient for controlling the progress of phenol nitration reaction, which comprises a branch end tube, one side of the branch end tube is communicated and connected with a converging tube, two ends of the branch end tube are communicated and connected with connecting tubes, the outer side of one end of the branch end tube is fixedly connected with a sleeve ring I, the outer side of the sleeve ring I is covered with a connecting sleeve, and one end of the inner side of the connecting sleeve is fixedly connected with a sleeve ring II; a hinge seat is fixedly connected to one end of the outer side of the second sleeve ring, an L-shaped turnover plate is rotationally connected to the hinge seat, a spring groove is formed in one end face of the L-shaped turnover plate, an extension spring is fixedly connected to the interior of the spring groove, a sleeve connecting hook is fixedly connected to the tail end of the extension spring, and a pressing ring is fixedly connected to one end of the outer side of the connecting pipe. The connecting sleeve, the L-shaped turnover plate and other unique connecting structures are adopted, the pipe inserting ring and the tensioning spring are matched to form a staggered sealing inserting structure, and the good connecting sealing performance is guaranteed while the connecting pipe and the branch end pipe are rapidly disassembled and assembled.

Description

Technical Field

[0001] This utility model relates to the field of reaction tube equipment technology, specifically a T-shaped reaction tube that facilitates control of the phenol nitration reaction progress. Background Technology

[0002] The nitration of phenol refers to the chemical reaction between phenol and nitrating agents such as nitric acid under certain conditions, in which hydrogen atoms on the benzene ring of phenol are replaced by nitro groups to produce products such as nitrophenol. This reaction is one of the important electrophilic substitution reactions in organic chemistry. The reaction has certain selectivity and condition requirements. The T-shaped reaction tube for the nitration of phenol is a special device used to carry out the nitration of phenol. It has a T-shaped structure, with one port for introducing the phenol raw material and the other port for introducing the nitrating agent, such as nitric acid or mixed acid. At the junction of the T-shaped tube, phenol and nitrating agent are fully mixed and the nitration reaction occurs. The product after the reaction flows out from the third port of the T-shaped tube.

[0003] The existing T-shaped reaction tube has a simple structure with a fixed transverse tube length, which makes it difficult to adjust flexibly according to different reaction conditions. When faced with different batches of reactant characteristics or diversified production needs, the fixed structure of the reaction tube cannot flexibly adapt to the needs by changing the length to accurately control the flow time of liquid into the confluence tube. This makes it difficult to accurately control the progress of phenol nitration reaction, and problems such as incomplete reaction or over-reaction are likely to occur, affecting product quality and reaction efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing T-shaped reaction tubes have a single structure and a fixed horizontal tube length, making it difficult to flexibly adjust according to different reaction conditions. When faced with different batches of reactants or diverse production needs, the fixed structure of the reaction tube cannot flexibly adapt to the requirements of changing the length to accurately control the flow time of liquid into the confluence tube, resulting in difficulty in accurately controlling the progress of phenol nitration reaction, and easily causing problems such as incomplete reaction or over-reaction, affecting product quality and reaction efficiency. The invention provides a T-shaped reaction tube that facilitates the control of the progress of phenol nitration reaction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a T-shaped reaction tube for easy control of the phenol nitration reaction progress, comprising: a branch pipe, a confluence pipe connected through one side of the branch pipe, and connecting pipes connected through both ends of the branch pipe; a sleeve ring one fixed to the outer side of one end of the branch pipe; a connecting sleeve covering the outer side of the sleeve ring one; a sleeve ring two fixed to the inner end of the connecting sleeve; a flip groove penetrating one end of the sleeve ring two; a hinge seat fixed to the outer end of the sleeve ring two; an L-shaped flip plate rotatably connected to the hinge seat; a spring groove on one end face of the L-shaped flip plate; a tension spring fixed inside the spring groove; a connecting hook fixed to the end of the tension spring; a pressure ring fixed to the outer end of the connecting pipe; an inner groove on the inner end of the connecting pipe; a tension spring fixed to one side of the inner groove; an insertion ring fixed to the other end of the tension spring; and an insertion groove on the inner side of one end of the branch pipe.

[0006] As a further embodiment of this utility model: the branch pipe and the connecting pipes at both ends are located on the same center line and are perpendicular to each other with the confluence pipe, forming a detachable T-shaped reaction pipe structure.

[0007] As a further embodiment of this utility model: the first sleeve ring and the pressing ring are covered inside the connecting sleeve when the split end pipe and the connecting pipe are connected; the second sleeve ring is compatible with the first sleeve ring in terms of specifications and they abut against each other; the shorter section of the L-shaped flip plate extends into the flip groove after flipping and abuts against the pressing ring on its side, thereby achieving the pressing operation of the first sleeve ring and the pressing ring; the connecting sleeve hook stably hooks the edge of the connecting sleeve after the L-shaped flip plate flips, so as to maintain the flipped state of the L-shaped flip plate.

[0008] As a further embodiment of this utility model: the number of the flip groove, hinge seat, L-shaped flip plate, spring groove, tension spring and connecting sleeve hook structure are all provided in four sets, arranged in a ring around the outside of the connecting sleeve in four directions.

[0009] As a further improvement of this utility model: the insertion ring is connected to the inside of the inner groove by several groups of tension springs arranged symmetrically in a ring, and the insertion ring is firmly pressed against the inside of the insertion groove under the action of spring tension, forming an insertion structure that is misaligned relative to the pipe connection and can be reset without obstructing the pipe connection, so as to improve the sealing performance of the pipe connection.

[0010] As a further embodiment of this utility model: an anti-detachment edge ring is fixedly connected to the inner side of the insertion ring near the tension spring, an inner diameter ring is screwed into the inside of the insertion ring, a reducing pipe is connected through one side of the inner diameter ring, a support ring is fixedly connected to the outer side of the other end of the reducing pipe, a sealing groove is opened near the inner edge of the inner diameter ring, and a sealing ring is fixedly connected to the end of the reducing pipe.

[0011] As a further improvement of this utility model: a flow-disrupting baffle is fixedly connected to the inner side of the confluence pipe perpendicular to the pipe wall, and the number of the flow-disrupting baffles is arranged in several groups, which are located at the two ends of the inner side of the confluence pipe and are relatively staggered.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The present invention features a design that allows for easy disassembly and free selection and extension of the connecting pipe and the branch pipe, which enables flexible changes in the transverse length of the T-shaped reaction pipe. Combined with replaceable inner diameter rings, reducing pipe diameter, and other components, the pipe diameter can be adjusted, thereby precisely controlling the flow rate and flow time of the liquid into the confluence pipe and accurately regulating the progress of the phenol nitration reaction. Compared with traditional reaction pipes, it can better adapt to different reaction conditions and requirements, and improve the accuracy and flexibility of reaction control.

[0014] 2. This utility model adopts a unique connection structure such as a connecting sleeve and an L-shaped flip plate, which, together with the insertion ring and tension spring, forms a staggered sealing insertion structure. This allows for quick assembly and disassembly of the connecting pipe and the branch pipe while ensuring good connection sealing. Furthermore, a staggered baffle is set in the confluence pipe to enhance the mixing effect, making the equipment have efficient sealing, convenient operation and excellent mixing performance, effectively improving reaction efficiency and product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the T-shaped reaction tube described in this utility model, which facilitates the control of the phenol nitration reaction progress;

[0016] Figure 2 This is a schematic diagram of the connecting pipe in the T-shaped reaction tube of this utility model, which facilitates control of the phenol nitration reaction progress;

[0017] Figure 3 This is a schematic diagram of the connecting sleeve in the T-shaped reaction tube of this utility model, which facilitates control of the phenol nitration reaction progress;

[0018] Figure 4 This is a schematic diagram of the enlarged view of point A in the T-shaped reaction tube of this utility model, which facilitates the control of the phenol nitration reaction progress;

[0019] Figure 5 This is a schematic diagram of the structure of the insert ring in the T-shaped reaction tube of the present invention, which facilitates control of the phenol nitration reaction progress;

[0020] Figure 6 This is a schematic diagram of the support ring in the T-shaped reaction tube of this utility model, which facilitates control of the phenol nitration reaction progress;

[0021] Figure 7 This is a schematic diagram of the structure of the turbulence baffle in the T-shaped reaction tube of the present invention, which facilitates the control of the phenol nitration reaction progress.

[0022] In the diagram: 1. Split end pipe; 2. Merging pipe; 3. Connecting pipe; 4. Sleeve ring one; 5. Connecting sleeve; 6. Sleeve ring two; 7. Tilting groove; 8. Hinge seat; 9. L-shaped tilting plate; 10. Spring groove; 11. Tension spring; 12. Connecting hook; 13. Pressing ring; 14. Inner groove; 15. Tension spring; 16. Insertion ring; 17. Anti-detachment ring; 19. Inner diameter ring; 21. Diameter reduction pipe; 22. Support ring; 23. Sealing groove; 24. Sealing ring; 25. Insertion groove; 26. Baffle. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0025] Reference Figures 1 to 5In this embodiment of the present invention, the T-shaped reaction tube for easy control of the phenol nitration reaction progress includes: a branch pipe 1, a connecting pipe 2 extending through one side of the branch pipe 1, connecting pipes 3 extending through both ends of the branch pipe 1, a sleeve ring 4 fixedly connected to the outer side of one end of the branch pipe 1, a connecting sleeve 5 covering the outer side of the sleeve ring 4, a sleeve ring 6 fixedly connected to one end of the inner side of the connecting sleeve 5, a turning groove 7 extending through one end of the sleeve ring 6, and a hinge seat fixedly connected to one end of the outer side of the sleeve ring 6. 8. The hinge seat 8 is rotatably connected to an L-shaped flip plate 9. One end face of the L-shaped flip plate 9 is provided with a spring groove 10. A tension spring 11 is fixedly connected inside the spring groove 10. A connecting hook 12 is fixedly connected to the end of the tension spring 11. A compression ring 13 is fixedly connected to one end of the outer side of the connecting pipe 3. An inner groove 14 is provided at one end of the inner side of the connecting pipe 3. A tension spring 15 is fixedly connected to one side of the inner groove 14. An insertion ring 16 is fixedly connected to the other end of the tension spring 15. An insertion groove 25 is provided on the inner side of one end of the split pipe 1.

[0026] Reference Figure 1 The branch pipe 1 and the connecting pipes 3 at both ends are located on the same center line and are perpendicular to each other with the confluence pipe 2, forming a detachable T-shaped reaction pipe structure.

[0027] Using the above scheme: the liquid to be mixed enters the branch pipe 1 through the connecting pipes 3 at both ends and is finally mixed in the confluence pipe 2. The connecting pipes 3 at both ends and the branch pipe 1 are easily disassembled and can be extended in any number to change the transverse pipe length. By controlling the transverse pipe length, the flow rate of the liquid flowing into the confluence pipe 2 is controlled, thereby controlling the progress of the phenol nitration reaction.

[0028] Reference Figures 2 to 5 The sleeve ring 4 and the pressing ring 13 are covered inside the connecting sleeve 5 when the split pipe 1 and the connecting pipe 3 are connected. The sleeve ring 6 is compatible with the sleeve ring 4 and they abut against each other. The shorter section of the L-shaped flip plate 9 extends into the flip groove 7 after flipping and abuts against the pressing ring 13 on the side, so as to realize the pressing operation of the sleeve ring 4 and the pressing ring 13. The connecting hook 12 stably hooks the edge of the connecting sleeve 5 after the L-shaped flip plate 9 is flipped to maintain the flipped state of the L-shaped flip plate 9. The flip groove 7, the hinge seat 8, the L-shaped flip plate 9, the spring groove 10, the tension spring 11 and the connecting hook 12 are all provided in four sets, which are arranged in a ring in four directions on the outside of the connecting sleeve 5.

[0029] Using the above solution: the connecting pipe 3 abuts against the sleeve ring 2 6 and the pressing ring 13, so that one end of the connecting sleeve 5 abuts against the sleeve ring 2 6 through the sleeve ring 1 4, and the other end rotates the L-shaped flip plate 9 around the hinge seat 8, so that the shorter section of the L-shaped flip plate 9 flips to extend into the flip groove 7, and the outer side abuts against the side of the pressing ring 13. Then the connecting sleeve hook 12 is pulled out through the spring groove 10 and the tension spring 11 structure, so that it is stably hooked on the edge of the connecting sleeve 5, so as to fix the state of the shorter section of the L-shaped flip plate 9 abutting against the pressing ring 13, thus realizing the convenient disassembly and assembly of the connecting pipe 3 and the split pipe 1.

[0030] Reference Figure 5 and Figure 6 The insertion ring 16 is connected to the inner groove 14 by several groups of tension springs 15 arranged symmetrically in a ring. Under the action of spring tension, the insertion ring 16 is firmly pressed against the inside of the insertion groove 25, forming an insertion structure that is misaligned relative to the pipe connection and can be reset without obstructing the pipe connection, so as to improve the sealing performance of the pipe connection.

[0031] The above scheme is adopted: the insertion ring 16 extends out of the edge of the connecting tube 3 and is connected by several sets of tension springs 15, so that it is stably inserted into the insertion groove 25. The contact surfaces of the two are misaligned relative to the connection surfaces of the branch tube 1 and the connecting tube 3. The connection sealing of the quick-release connecting tube 3 is improved by the contact between the front of the two and the contact between the insertion ring 16 and the side of the inner groove 14.

[0032] Reference Figure 5 and Figure 6 An anti-detachment edge ring 17 is fixedly connected to one end of the insertion ring 16 near the tension spring 15. An inner diameter ring 19 is screwed into the insertion ring 16. A reducing pipe 21 is connected through one side of the inner diameter ring 19. A support ring 22 is fixedly connected to the outer side of the other end of the reducing pipe 21. A sealing groove 23 is opened near the inner edge of the inner diameter ring 19. A sealing ring 24 is fixedly connected to the end of the reducing pipe 21.

[0033] The above scheme adopts an integrated structure where the inner diameter ring 19, the reducing pipe 21, and the support ring 22 are integrated into a single unit. This integrated structure is available in various specifications and can be freely selected according to the required pipe diameter. The inner diameter ring 19 is threaded to the inside of the insertion ring 16. The anti-detachment ring 17 abuts against the inner diameter ring 19 to prevent excessive threading and detachment from the structure. This threaded connection allows the overall structure to be customized by selecting a reducing pipe 21 with the appropriate diameter based on actual reaction requirements. This facilitates relatively convenient changes in pipe diameter without affecting the connection with the mixing liquid receiving structure, adapting to different reaction rate requirements. The recessed sealing groove 23 abuts against the protruding sealing ring 24, improving the sealing performance of the connection between adjacent reducing pipes 21.

[0034] Reference Figure 7A flow-disrupting baffle 26 is fixedly connected to the inner side of the confluence pipe 2 perpendicular to the pipe wall. Several sets of flow-disrupting baffles 26 are arranged and are staggered at both ends of the inner side of the confluence pipe 2.

[0035] The above scheme is adopted: several sets of turbulence baffles 26 are set at opposite ends on the inner side of the manifold 2 to generate shear force on the liquid entering the manifold 2 and improve its mixing effect.

[0036] The working principle of this utility model is as follows: During the reaction preparation stage, according to the actual reaction requirements, select an inner diameter ring 19, a reducing pipe 21, and a support ring 22 assembly with appropriate diameter specifications. Connect them to the inside of the insertion ring 16 through a threaded structure. The anti-detachment edge ring 17 prevents the screw connection from being excessively pulled out. The sealing groove 23 and the sealing ring 24 cooperate with each other to ensure the sealing of the connection between adjacent reducing pipes 21, thereby completing the adjustment and adaptation of the pipe diameter.

[0037] During assembly, several sets of connecting pipes 3, in selectable quantities, are connected to both ends of the branch pipe 1. At this time, sleeve ring 2 6 abuts against the pressing ring 13, and one end of the connecting sleeve 5 abuts against sleeve ring 2 6 through sleeve ring 1 4. Then, the L-shaped flip plate 9 is rotated around the hinge seat 8, so that the shorter section of the L-shaped flip plate 9 flips and extends into the flip groove 7, and its outer side abuts against the side of the pressing ring 13. Then, the tension spring 11 in the spring groove 10 pulls out the connecting sleeve hook 12, so that it is stably hooked onto the connecting sleeve 5. The edge is fixed to the position of the L-shaped flip plate 9, so as to realize the convenient and stable connection between the connecting pipe 3 and the branch pipe 1. At the same time, the insertion ring 16 extends out of the edge of the connecting pipe 3 under the tension of the tension spring 15 and is firmly inserted into the insertion groove 25 of the branch pipe 1. Since the contact surface of the insertion ring 16 and the insertion groove 25 is offset relative to the connection surface of the branch pipe 1 and the connecting pipe 3, the connection sealing of the external pipe body is further improved by the front abutting of the two and the side abutting of the insertion ring 16 and the inner groove 14.

[0038] During the reaction, phenol and nitrating reagent are mixed liquids that flow into the connecting pipes 3 at both ends. Since the connecting pipes 3 and the branch pipes 1 can be extended by any number of selections, the flow rate and flow time of the liquid into the confluence pipe 2 can be controlled by changing the transverse pipe length and internal pipe diameter, thereby regulating the progress of the phenol nitration reaction. After the liquid enters the confluence pipe 2, several sets of turbulence baffles 26, which are relatively staggered at both ends on the inner side, generate shear force on the liquid, breaking the laminar flow state of the liquid and enhancing the degree of turbulence, so that different liquids can come into more full contact and mix, thereby improving the mixing effect and promoting the uniform and efficient phenol nitration reaction. After the reaction is completed, if it is necessary to disassemble the connecting pipe 3, simply loosen the connecting hook 12 from the edge of the connecting sleeve 5 and reverse the L-shaped flip plate 9 to separate the connecting pipe 3 from the branch pipe 1, which facilitates the cleaning and maintenance of the equipment and the readjustment and reassembly according to new reaction requirements.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A T-shaped reaction tube for easy control of the phenol nitration reaction, including: The branch pipe (1) is characterized in that a confluence pipe (2) is connected through one side of the branch pipe (1), and a connecting pipe (3) is connected through both ends of the branch pipe (1). A sleeve ring (4) is fixedly connected to the outer side of one end of the branch pipe (1), and a connecting sleeve (5) is provided on the outer side of the sleeve ring (4). A sleeve ring (6) is fixedly connected to the inner end of the connecting sleeve (5). A flip groove (7) is provided through one end of the sleeve ring (6), and a hinge seat (8) is fixedly connected to the outer end of the sleeve ring (6). The hinge seat (8) is rotatably connected to an L-shaped flip. The rotating plate (9) has a spring groove (10) on one end face, a tension spring (11) is fixed inside the spring groove (10), a connecting hook (12) is fixed at the end of the tension spring (11), a pressure ring (13) is fixed at one end of the outer side of the connecting pipe (3), an inner groove (14) is opened at one end of the inner side of the connecting pipe (3), a tension spring (15) is fixed on one side of the inner groove (14), an insertion ring (16) is fixed at the other end of the tension spring (15), and an insertion groove (25) is opened on the inner side of one end of the split end pipe (1).

2. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that, The branch pipe (1) and the connecting pipes (3) at both ends are located on the same center line and are perpendicular to each other with the confluence pipe (2), forming a detachable T-shaped reaction pipe structure.

3. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that... The sleeve ring one (4) and the pressing ring (13) are covered inside the connecting sleeve (5) when the split end pipe (1) and the connecting pipe (3) are connected. The sleeve ring two (6) is compatible with the sleeve ring one (4) and the two abut against each other. The shorter section of the L-shaped flip plate (9) extends into the flip groove (7) after flipping and abuts against the pressing ring (13) on the side, so as to realize the pressing operation of the sleeve ring one (4) and the pressing ring (13). The connecting hook (12) stably hooks the edge of the connecting sleeve (5) after the L-shaped flip plate (9) is flipped to maintain the flipped state of the L-shaped flip plate (9).

4. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that, The number of the flip groove (7), hinge seat (8), L-shaped flip plate (9), spring groove (10), tension spring (11) and connecting hook (12) structures are all provided in four sets, which are arranged in a ring around the outside of the connecting sleeve (5).

5. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that, The insertion ring (16) is connected to the inner groove (14) by several sets of tension springs (15) arranged symmetrically in a ring. Under the action of spring tension, the insertion ring (16) is firmly pressed against the inside of the insertion groove (25), forming an insertion structure that is misaligned relative to the pipe connection and can be reset without obstructing the pipe connection, so as to improve the sealing performance of the pipe connection.

6. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that, An anti-detachment ring (17) is fixedly connected to one end of the insertion ring (16) near the tension spring (15). An inner diameter ring (19) is screwed into the insertion ring (16). A reducing pipe (21) is connected through one side of the inner diameter ring (19). A support ring (22) is fixedly connected to the outer side of the other end of the reducing pipe (21). A sealing groove (23) is opened near the inner edge of the inner diameter ring (19). A sealing ring (24) is fixedly connected to the end of the reducing pipe (21).

7. The T-shaped reaction tube according to claim 1, which facilitates control of the phenol nitration reaction progress, is characterized in that, The inner side of the confluence pipe (2) is fixed with a baffle plate (26) perpendicular to the pipe wall. The baffle plate (26) is arranged in several groups and is located at the two ends of the inner side of the confluence pipe (2) with relative offset.

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