A reaction kettle for preparing 2,6-difluorobenzamide

Abstract

The utility model discloses a kind of 2,6-difluorobenzamide preparation use reaction kettle, it is related to the technical field of compound preparation;And the utility model includes reactor body, the end portion fixed mounting of first motor output shaft has stirring shaft, the bottom of stirring shaft is fixed with the symmetrical distribution of stirring vane, the inside of reactor body is provided with the flow component of annular array distribution, the inside of reactor body is provided with flushing component;By flow board, raw material edge is formed into vortex and center raw material is fully mixed, improve stirring effect, reduce liquid surface agitation, by first rotating shaft drive flow board rotation, adjust the angle of flow board to realize different vortex, so that it can avoid uneven stirring and liquid surface agitation condition, to reach the purpose of improving stirring effect;By the forward and reverse rotation control of second motor annular water pipe reciprocating lifting, the water that nozzle sprays is flushed to the inner wall of reactor body, so it can be convenient to flush the inner wall of reactor body, to reach the purpose of improving flushing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of compound preparation technology, specifically to a reaction vessel for preparing 2,6-difluorobenzamide. Background Technology

[0002] 2,6-Difluorobenzamide is an organic compound with important applications in pesticides, pharmaceuticals, and liquid crystal materials. As a key intermediate in the synthesis of fluorobenzoylurea pesticides, it is used to prepare insecticides such as flufenoxuron, diflubenzuron, and chlorfluazuron. It is characterized by high efficiency, low toxicity, and environmental friendliness, and can control a variety of crop pests. The preparation of 2,6-difluorobenzamide usually involves hydrolysis, neutralization, and separation.

[0003] Hydrolysis reactions are generally carried out in a reaction vessel. Currently, the stirring of the reaction vessel is generally achieved by stirring blades on the central shaft. The stirring efficiency is low, and the liquid surface and edges are prone to agitation, resulting in liquid splashing. Utility Model Content

[0004] To address the issues of low mixing efficiency of the central stirring blades and splashing of turbulent liquid at the liquid surface and edges, the present invention aims to provide a reaction vessel for the preparation of 2,6-difluorobenzamide.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a reaction vessel for preparing 2,6-difluorobenzamide, comprising a reaction vessel body, a support frame fixedly provided at the top of the reaction vessel body, a first motor fixedly provided at the top of the support frame, a stirring shaft fixedly installed at the end of the output shaft of the first motor, the bottom end of the stirring shaft being movably inserted into the interior of the reaction vessel body, symmetrically distributed stirring blades fixedly provided at the bottom of the stirring shaft, a flow-around assembly arranged in a ring array inside the reaction vessel body, and a rinsing assembly inside the reaction vessel body; the flow-around assembly includes a flow-around plate and a fixing plate, the fixing plate being symmetrically distributed and fixed. Installed on the inner wall of the reactor body, a first rotating shaft is rotatably mounted on the opposite side of the fixed plate. The flow-encircling plate is fixedly sleeved on the outside of the first rotating shaft. A connecting shaft rotatably passes through the top of the reactor body. The bottom end of the connecting shaft is fixedly connected to the top end of the first rotating shaft. A worm gear is fixedly mounted on the top end of the connecting shaft. A worm is meshed on the outside of the worm gear. A support plate is fixedly mounted on the top end of the reactor body. One end of the worm is rotatably mounted on the support plate. A pointer is fixedly mounted on the top end of the connecting shaft. A scale plate is fixedly mounted on the top end of the reactor body. The scale plate is used in conjunction with the pointer. A rotating wheel is fixedly mounted on one end of the worm. The flow-encircling plate has a folded angle structure.

[0006] Preferably, the rinsing assembly includes an annular water pipe located inside the reactor body. Several nozzles arranged in a circular array are provided on the outer side of the annular water pipe. A support rod is fixedly installed on the inner side of the annular water pipe, and a fixed cylinder is fixedly installed in the middle of the support rod. A sleeve is movably installed inside the fixed cylinder, with its bottom end movably inserted into the inside of the fixed cylinder. The top end of the sleeve is rotatably installed through the top of the reactor body. An external thread is provided at the bottom end of the sleeve, and the fixed cylinder is threaded to the inner wall of the fixed cylinder via the external thread. A first gear is fixedly installed on the outer side of the sleeve, and a second gear meshes with the outer side of the first gear. The annular water pipe is connected to an external water source via a telescopic connecting pipe. The second gear drives the sleeve to rotate via the first gear, and the sleeve rotates via the external thread. The moving fixed cylinder descends, and the reciprocating motion of the annular water pipe, controlled by the forward and reverse rotation of the second motor, causes the water sprayed from the nozzle to rinse the inner wall of the reactor body. This facilitates cleaning of the reactor body's inner wall. A mounting plate is fixedly installed at the top of the reactor body, and a second motor is fixedly installed on the mounting plate. The end of the output shaft of the second motor is fixedly connected to the middle of the second gear. The mounting plate facilitates the installation of the second motor, which provides power for the rotation of the second gear. Symmetrically distributed guide rods are fixedly installed on the support rod, and the top of the guide rods extends through the top of the reactor body. The guide rods help maintain the stability of the support rod's movement. The middle of the support rod has an annular structure, and the bottom end of the stirring shaft passes through the sleeve and the middle of the support rod in sequence, thus avoiding interference between the support rod and the stirring shaft.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] 1. The flow plate creates a swirling flow at the edge of the raw material, which is then fully mixed with the central raw material, improving the stirring effect and reducing surface turbulence. The first rotating shaft drives the flow plate to rotate, and the angle of the flow plate can be adjusted to achieve different swirling flows. This avoids uneven stirring and surface turbulence, thereby improving the stirring effect.

[0009] 2. By controlling the forward and reverse rotation of the second motor to raise and lower the annular water pipe, the water sprayed from the nozzles washes the inner wall of the reactor body. This facilitates the washing of the inner wall of the reactor body, thereby improving the washing efficiency. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 for Figure 1 Enlarged view of the structure of A in the middle.

[0013] Figure 3 This is a schematic cross-sectional view of the structure of this utility model.

[0014] Figure 4 This is a schematic diagram of the support and fixing cylinder and its connection structure of the present invention.

[0015] Figure 5 This is a schematic diagram of the flow plate structure of this utility model.

[0016] In the diagram: 1. Reactor body; 2. Flow assembly; 21. Flow plate; 22. Fixing plate; 23. Connecting shaft; 24. First rotating shaft; 25. Worm gear; 26. Worm; 27. Support plate; 28. Rotary wheel; 29. ​​Pointer; 210. Scale plate; 3. Stirring shaft; 4. Support frame; 5. First motor; 6. Stirring blade; 7. Flushing assembly; 71. Annular water pipe; 72. Nozzle; 73. Support rod; 74. Fixing cylinder; 75. Sleeve; 76. External thread; 77. First gear; 78. Second gear; 79. Second motor; 710. Mounting plate; 711. Guide rod. Detailed Implementation

[0017] 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.

[0018] Example: Figure 1-5As shown, this utility model provides a reaction vessel for the preparation of 2,6-difluorobenzamide, including a reaction vessel body 1. A support frame 4 is fixedly provided at the top of the reaction vessel body 1, and a first motor 5 is fixedly provided at the top of the support frame 4. A stirring shaft 3 is fixedly installed at the end of the output shaft of the first motor 5. The bottom end of the stirring shaft 3 is movably inserted into the interior of the reaction vessel body 1. Symmetrically distributed stirring blades 6 are fixedly provided at the bottom of the stirring shaft 3. A flow-around assembly 2 arranged in a ring array is provided inside the reaction vessel body 1. A flushing assembly 7 is provided inside the reaction vessel body 1. The flow-around assembly 2 includes a flow-around plate 21 and a fixed plate 22. The fixed plate 22 is symmetrically distributed and fixedly installed on the inner wall of the reaction vessel body 1. A first rotating shaft 24 is rotatably installed on the opposite side of the fixed plate 22. The flow-around plate 21 is fixedly sleeved on the outside of the first rotating shaft 24. A connecting shaft 23 rotatably passes through the top of the reaction vessel body 1. The bottom end of the connecting shaft 23 is connected to the first rotating shaft 24. A rotating shaft 24 is fixedly connected to the top end of a connecting shaft 23, and a worm gear 25 is fixedly mounted on the top end of the connecting shaft 23. A worm 26 is meshed on the outer side of the worm gear 25. A support plate 27 is fixedly mounted on the top end of the reactor body 1. One end of the worm 26 is rotatably mounted on the support plate 27. The flow plate 21 causes the edge of the raw material to form a swirling flow and fully mixes with the central raw material, improving the stirring effect and reducing the turbulence of the liquid surface. The first rotating shaft 24 drives the flow plate 21 to rotate. The angle of the flow plate 21 can be adjusted to achieve different swirling flows. A pointer 29 is fixedly mounted on the top end of the connecting shaft 23. A scale plate 210 is fixedly mounted on the top end of the reactor body 1. The scale plate 210 is used in conjunction with the pointer 29. The rotation angle can be easily judged by the pointer 29 and the scale plate 210. A rotating wheel 28 is fixedly mounted on one end of the worm 26. The worm 26 can be rotated in a distributed manner by the rotating wheel 28. The flow plate 21 has a folded structure, so that water can form a swirling flow after passing through the flow plate 21.

[0019] The rinsing assembly 7 includes an annular water pipe 71 located inside the reactor body 1. Several nozzles 72 arranged in a circular array are located on the outer side of the annular water pipe 71. A support rod 73 is fixedly mounted on the inner side of the annular water pipe 71, and a fixed cylinder 74 is fixedly mounted in the middle of the support rod 73. A sleeve 75 is movably mounted inside the fixed cylinder 74, with its bottom end movably inserted into the interior of the fixed cylinder 74. The top end of the sleeve 75 is rotatably mounted through the top of the reactor body 1. An external thread 76 is provided at the bottom end of the sleeve 75. The fixed cylinder 74 is threaded to its inner wall via the external thread 76. A first gear 77 is fixedly mounted on the outer side of the sleeve 75, and a second gear 78 meshes with the outer side of the first gear 77. The annular water pipe 71 is connected to an external water source via a telescopic connecting pipe. The second gear 78 drives the sleeve 75 to rotate via the first gear 77, and the sleeve 75 is driven to rotate via the external thread 76. The cylinder 74 descends, and the reciprocating motion of the annular water pipe 71, controlled by the forward and reverse rotation of the second motor 79, causes the water sprayed from the nozzle 72 to rinse the inner wall of the reactor body 1. This facilitates cleaning of the inner wall of the reactor. A mounting plate 710 is fixedly installed at the top of the reactor body 1, and a second motor 79 is fixedly installed on the mounting plate 710. The end of the output shaft of the second motor 79 is fixedly connected to the middle of the second gear 78. The mounting plate 710 facilitates the installation of the second motor 79, which provides power for the rotation of the second gear 78. Symmetrically distributed guide rods 711 are fixedly installed on the support rod 73. The top of the guide rod 711 moves through the top of the reactor body 1, and the guide rod 711 keeps the support rod 73 moving stably. The middle of the support rod 73 has an annular structure, and the bottom end of the stirring shaft 3 passes through the sleeve 75 and the middle of the support rod 73 in sequence, thus avoiding interference between the support rod 73 and the stirring shaft 3.

[0020] Working principle: When a stirring reaction is required, the raw materials are added through the inlet of the reactor body 1. The reactor heats the raw materials and starts the first motor 5 at the same time. The output shaft of the first motor 5 drives the stirring shaft 3 to rotate, and the stirring shaft 3 drives the stirring blade 6 to rotate, so that the stirring blade 6 stirs the raw materials to carry out the hydrolysis reaction. The rotating raw materials pass through the flow plate 21 to form a swirling flow, so that the swirling flow and the raw materials in the center of the stirring blade 6 are fully mixed, improving the stirring effect and reducing the turbulence of the liquid surface.

[0021] When it is necessary to adjust the angle of the flow plate 21, rotate the wheel 28. The wheel 28 drives the worm 26 to rotate, the worm 26 drives the worm wheel 25 to rotate, the worm wheel 25 drives the connecting shaft 23 to rotate, the connecting shaft 23 drives the first rotating shaft 24 to rotate, and the first rotating shaft 24 drives the flow plate 21 to rotate. Adjusting the angle of the flow plate 21 can achieve different swirling flow, thereby meeting different stirring requirements. At the same time, the connecting shaft 23 drives the pointer 29 to rotate, and the scale plate 210 can be observed to determine the adjusted angle. This makes the angle adjustment convenient.

[0022] When the reactor needs to be cleaned, the external water source is turned on, and water enters the annular water pipe 71 through the telescopic connecting pipe and is sprayed out from the nozzle 72. Then, the second motor 79 is started, and the end of the output shaft of the second motor 79 drives the second gear 78 to rotate. The second gear 78 drives the first gear 77 to rotate, and the first gear 77 drives the sleeve 75 to rotate. The sleeve 75 drives the fixed cylinder 74 to descend through the external thread 76. The fixed cylinder 74 drives the annular water pipe 71 to move downward through the support rod 73. The forward and reverse rotation of the second motor 79 controls the reciprocating rise and fall of the annular water pipe 71, so that the water sprayed from the nozzle 72 can rinse the inner wall of the reactor body 1. This makes it easy to clean the inner wall of the reactor.

[0023] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0024] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A reaction vessel for preparing 2,6-difluorobenzamide, comprising a reaction vessel body (1), characterized in that: The top of the reactor body (1) is fixedly provided with a support frame (4), the top of the support frame (4) is fixedly provided with a first motor (5), the end of the output shaft of the first motor (5) is fixedly installed with a stirring shaft (3), the bottom end of the stirring shaft (3) is movably inserted into the interior of the reactor body (1), the bottom of the stirring shaft (3) is fixedly provided with symmetrically distributed stirring blades (6), the interior of the reactor body (1) is provided with a flow-around assembly (2) arranged in a ring array, and the interior of the reactor body (1) is provided with a flushing assembly (7). The flow-around assembly (2) includes a flow-around plate (21) and a fixed plate (22). The fixed plate (22) is symmetrically distributed and fixedly installed on the inner wall of the reactor body (1). A first rotating shaft (24) is rotatably installed on the opposite side of the fixed plate (22). The flow-around plate (21) is fixedly sleeved on the outside of the first rotating shaft (24). A connecting shaft (23) is rotatably passed through the top of the reactor body (1). The bottom end of the connecting shaft (23) is fixedly connected to the top end of the first rotating shaft (24). A worm gear (25) is fixedly provided at the top end of the connecting shaft (23). A worm (26) is meshed on the outside of the worm gear (25). A support plate (27) is fixedly provided at the top end of the reactor body (1). One end of the worm (26) is rotatably installed on the support plate (27).

2. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 1, characterized in that, The flushing assembly (7) includes an annular water pipe (71) located inside the reactor body (1). Several nozzles (72) arranged in an annular array are provided on the outer side of the annular water pipe (71). A support rod (73) is fixedly provided on the inner side of the annular water pipe (71). A fixed cylinder (74) is fixedly provided in the middle of the support rod (73). A sleeve (75) is movably provided inside the fixed cylinder (74). The bottom end of the sleeve (75) is movably inserted into the inside of the fixed cylinder (74). The top end of the sleeve (75) is rotatably installed through the top of the reactor body (1). An external thread (76) is provided on the bottom end of the sleeve (75). The fixed cylinder (74) is threaded to the inner wall of the fixed cylinder (74) through the external thread (76). A first gear (77) is fixedly provided on the outer side of the sleeve (75). A second gear (78) meshes with the outer side of the first gear (77).

3. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 1, characterized in that, A pointer (29) is fixedly provided at the top of the connecting shaft (23), and a scale plate (210) is fixedly provided at the top of the reactor body (1). The scale plate (210) is used in conjunction with the pointer (29).

4. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 2, characterized in that, The top of the reactor body (1) is fixedly provided with a mounting plate (710), and a second motor (79) is fixedly provided on the mounting plate (710). The end of the output shaft of the second motor (79) is fixedly connected to the middle of the second gear (78).

5. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 2, characterized in that, The support rod (73) is fixed with symmetrically distributed guide rods (711), and the top end of the guide rods (711) can move through the top of the reactor body (1).

6. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 2, characterized in that, The middle part of the support rod (73) is an annular structure, and the bottom end of the stirring shaft (3) passes through the middle part of the sleeve (75) and the support rod (73) in sequence.

7. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 1, characterized in that, One end of the worm gear (26) is fixedly provided with a rotating wheel (28).

8. The reaction vessel for preparing 2,6-difluorobenzamide as described in claim 1, characterized in that, The flow plate (21) has a folded structure.

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