An isoxaben rebenzylating stirred tank

Abstract

The utility model relates to a kind of isoxaben rebenzylation stirred tank.The output shaft of stirring motor is connected with the top end of connecting shaft by coupling, the bottom end of connecting shaft is connected with stirring shaft by coupling, and the upper and lower ends of connecting shaft are supported by bearing seat respectively;The part of stirring shaft that extends into the inside of stirred tank body is connected with stirring blade, and stirring blade includes anchor stirring blade, paddle stirring blade and transverse stirring blade;Paddle stirring blade is composed of horizontal plate and first inclined plate, second inclined plate, and the included angle formed by first inclined plate, second inclined plate and horizontal plate is obtuse angle.The utility model has the advantages that: double fulcrum support is realized, the deflection of stirring shaft is very small, stable operation, and vibration is significantly reduced;Adopt complex stirring blade structure, avoid the situation that bottom material cannot participate in stirring reaction, and stirring is more uniform;It can effectively solve the problem of large operation vibration and uneven stirring of rebenzylation stirred tank, and significantly improve the intrinsic safety degree of rebenzylation process.

Description

Technical Field

[0001] This utility model relates to the field of isoxaflutole preparation technology, specifically to an isoxaflutole rebenzylation stirred tank. Background Technology

[0002] Isoxaben, also known as cyclohexane, is an organic heterocyclic selective pre-emergence herbicide suitable for controlling annual grasses and broadleaf weeds in fields of soybeans, peanuts, and corn. In the preparation of isoxaben, the rebenzylation reaction is a crucial purification and protection step, following the cyclization, chlorination, and hydrolysis reactions that generate free phenolic hydroxyl groups. Its purpose is to stabilize the intermediate to facilitate subsequent derivatization reactions, thereby obtaining the final product efficiently and in high yield. The rebenzylation reaction involves reacting the acidic organic phase from the previous process with o-chlorobenzyl chloride (OCBC) and 15% sodium carbonate in a stirred reactor.

[0003] In existing technologies, the stirring shaft installation structure of the isoxaflutole rebenzylation stirred tank adopts a cantilevered single-support structure. The output shaft of the stirring motor is directly connected to the stirring shaft, with only one bearing seat (support point) for support. The stirring shaft and impeller are cantilevered. The weight of the stirring shaft and impeller, as well as the uneven resistance of the material to the impeller, i.e., the radial force, will form a huge torque, all of which is borne by the single support bearing. During the isoxaflutole rebenzylation stirring reaction, the material concentration is high and the material is viscous, which will lead to a slow stirring rate. In addition, the stirring shaft has a large deflection, and the distal end of the stirring shaft will bend and deform. It is easy to generate severe vibration during the stirring process, which will affect the stirring effect, generate noise, and damage the stirring shaft. Furthermore, the existing stirring paddle is a single anchor-type stirring paddle, which makes it difficult to stir the material at the bottom corners. There will be some material in the stirred tank that has not been stirred and reacted, resulting in uneven stirring. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a stirring vessel for isoxaflutole rebenzylation, which can solve the problems of large deflection of the stirring shaft, easy generation of violent vibration during stirring, easy damage of the stirring shaft, difficulty in stirring the material at the bottom corners and edges, and poor stirring effect caused by the use of single-point support in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: it includes a stirring motor and a stirring shaft. The stirring motor is installed outside the stirring vessel body, and the stirring shaft extends into the stirring vessel body. The characteristic is that the output shaft of the stirring motor is connected to the top end of the connecting shaft through a coupling, the bottom end of the connecting shaft is connected to the stirring shaft through a coupling, and the upper end and lower end of the connecting shaft are respectively supported by bearing seats. The portion of the stirring shaft that extends into the mixing vessel body is connected to stirring blades. The stirring blades include anchor-type stirring blades, paddle-type stirring blades, and transverse stirring blades. The paddle-type stirring blades are located between the anchor-type stirring blades and the transverse stirring blades, and the transverse stirring blades are located at the bottom of the stirring shaft. The anchor-type stirring blade has a U-shaped structure, the transverse stirring blade has a horizontal plate structure, and the paddle-type stirring blade consists of a horizontal plate, a first inclined plate, and a second inclined plate. The horizontal plate is connected to the bottom of the stirring shaft, and the first and second inclined plates are respectively connected to the two ends of the horizontal plate. The angle formed by the first and second inclined plates and the horizontal plate is an obtuse angle, and the first and second inclined plates are arranged in parallel.

[0006] Furthermore, a fixing frame is installed on the top of the mixing vessel, the mixing motor is fixedly installed on the top of the fixing frame, and the bearing seat is installed inside the fixing frame.

[0007] Furthermore, the angle formed between the bottom of the first inclined plate and the horizontal plate is 130-140°, and the angle formed between the top of the second inclined plate and the horizontal plate is 130-140°.

[0008] Furthermore, the anchor-type stirring blade is installed at the middle position of the stirring shaft.

[0009] Furthermore, the top of the second inclined plate of the paddle-type stirring blade is set lower than the bottom of the anchor-type stirring blade, and the bottom of the first inclined plate is on the same horizontal line as the bottom of the transverse stirring blade.

[0010] Furthermore, the anchor-type stirring blade and the paddle-type stirring blade are welded and fixed to the side of the stirring shaft, and the transverse stirring blade is welded and fixed to the bottom of the stirring shaft.

[0011] Furthermore, a sleeve is provided at the middle position of the paddle-type stirring blade and the anchor-type stirring blade, and the paddle-type stirring blade and the anchor-type stirring blade are sleeved and fixed on the stirring shaft through the sleeve, and the sleeve is fixed to the stirring shaft by welding.

[0012] With the above structure, the advantages of this utility model are as follows: by setting a connecting shaft between the stirring shaft and the output shaft of the stirring motor, and the connecting shaft being stably supported by two bearing seats, a double-support point is achieved. The stirring motor only provides torque and does not bear the radial force generated by stirring. The load-bearing capacity of the entire device is much higher than that of the single-support point structure. The deflection of the stirring shaft is very small, the operation is smooth, the vibration is significantly reduced, the noise is low, and the stirring shaft is not easily damaged. The device employs a compound stirring blade structure. The horizontal stirring blades agitate the material in the middle of the bottom, while the first inclined plate of the paddle-type stirring blades agitates the material at the bottom corners of the mixing vessel upwards. The second inclined plate then agitates the material upwards, and finally, the anchor-type stirring blades stir the agitated material at the bottom to ensure a more uniform mixing process and prevent the material at the bottom from being unable to participate in the stirring reaction. By improving the structure, the problems of large vibration and uneven mixing during the operation of the rebenzylation stirred tank can be effectively solved, significantly improving the intrinsic safety of the rebenzylation process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand this utility model, but do not limit the present utility model to the scope of the described embodiments.

[0015] Example 1: This specific implementation adopts the following technical solution: such as Figure 1 As shown, a rebenzylation reactor for isoxaflutole includes a stirring motor 2 and a stirring shaft 3. A fixing frame 4 is installed on the top of the reactor body 1. The fixing frame 4 is fixed by a mounting base. The stirring motor 2 is fixedly installed on the top of the fixing frame 4.

[0016] The stirring shaft 3 extends into the stirring vessel body 1. The output shaft of the stirring motor 2 is connected to the top end of the connecting shaft 6 through the coupling 5. The bottom end of the connecting shaft 6 is connected to the stirring shaft 3 through the coupling 5. The upper and lower ends of the connecting shaft 6 are supported by the bearing seat 7 and the bearing (not shown in the figure) inside the bearing seat 7, respectively. The bearing seat 7 is installed inside the fixed frame 4.

[0017] By setting a connecting shaft 6 between the stirring shaft 3 and the output shaft of the stirring motor 2, and the connecting shaft 6 being stably supported by two bearing seats 7, a double-support point is achieved. The stirring motor 2 only provides torque and does not bear the radial force generated by stirring. The load-bearing capacity of the entire device is much higher than that of a single-support point structure. The deflection of the stirring shaft 3 is very small, the operation is smooth, the vibration is significantly reduced, the stirring effect is ensured, the noise is low, and the stirring shaft 3 is not easily damaged.

[0018] The portion of the stirring shaft 3 extending into the mixing vessel body 1 is connected to stirring blades. These blades include anchor-type stirring blades 8, paddle-type stirring blades 9, and transverse stirring blades 10. The paddle-type stirring blade 9 is positioned between the anchor-type stirring blades 8 and the transverse stirring blades 10. The transverse stirring blades 10 are located at the bottom of the stirring shaft 3. The anchor-type stirring blades 8 and 9 are welded and fixed to the side of the stirring shaft 3, while the transverse stirring blades 10 are welded and fixed to the bottom of the stirring shaft 3. The anchor-type stirring blade 8 has a U-shaped structure and is installed in the middle of the stirring shaft 3. The side plate of the anchor-type stirring blade 8 is connected to the stirring shaft 3 via a connecting rod.

[0019] The transverse stirring blade 10 has a horizontal plate structure. The paddle-type stirring blade 9 consists of a horizontal plate 91, a first inclined plate 92, and a second inclined plate 93. The horizontal plate 91 is connected to the lower part of the stirring shaft 3. The first inclined plate 92 and the second inclined plate 93 are respectively connected to the two ends of the horizontal plate 91, and the angle formed between the first inclined plate 92, the second inclined plate 93 and the horizontal plate 91 is an obtuse angle. The first inclined plate 92 and the second inclined plate 93 are arranged in parallel. The angle formed between the bottom of the first inclined plate 92 and the horizontal plate 91 is 130-140°, and the angle formed between the top of the second inclined plate 93 and the horizontal plate 91 is 130-140°. In this embodiment, the angle formed between the bottom of the first inclined plate 92 and the horizontal plate 91 and the angle formed between the top of the second inclined plate 93 and the horizontal plate 91 are both 135°.

[0020] The top of the second inclined plate 93 of the paddle-type stirring blade 9 is set lower than the bottom of the anchor-type stirring blade 8, and the bottom of the first inclined plate 92 is on the same horizontal line as the bottom of the transverse stirring blade 10.

[0021] Example 2: This example is the same as Example 1 in other structures, except that: Figure 2 As shown, sleeves 11 are provided at the middle positions of the paddle-type stirring blade 9 and the anchor-type stirring blade 8, and the paddle-type stirring blade 9 and the anchor-type stirring blade 8 are sleeved and fixed on the stirring shaft 3 through the sleeves 11. The sleeves 11 and the stirring shaft 3 are fixed by welding.

[0022] The components mentioned above, such as the stirring motor 2, coupling 5, and bearing housing 7, are all general standard parts or parts known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, and will not be elaborated further.

[0023] Working principle: By setting a connecting shaft 6 between the stirring shaft 3 and the output shaft of the stirring motor 2, and the connecting shaft 6 being stably supported by two bearing seats 7, a double-support point is achieved. The stirring motor 2 only provides torque and does not bear the radial force generated by stirring. The load-bearing capacity of the entire device is much higher than that of a single-support point structure. The deflection of the stirring shaft 3 is very small, the operation is smooth, the vibration is significantly reduced, ensuring the stirring effect, and the noise is low. The stirring shaft 3 is not easily damaged. The stirring blade adopts a compound structure, including an anchor stirring blade 8, a paddle stirring blade 9, and a transverse stirring blade 10. The paddle stirring blade 9 consists of a horizontal plate 91. It consists of a first inclined plate 92 and a second inclined plate 93 arranged in parallel, and the angle formed by the first inclined plate 92, the second inclined plate 93 and the horizontal plate 91 is an obtuse angle. The material in the middle of the bottom of the mixing vessel 1 can be stirred by the transverse stirring blade 10. The material at the bottom corner of the mixing vessel 1 is stirred upward by the first inclined plate 92 of the paddle stirring blade 9, and then stirred upward by the second inclined plate 93. Finally, the bottom material stirred by the anchor stirring blade 8 is stirred to react, avoiding the situation where the bottom material cannot participate in the stirring reaction, thus improving the stirring effect of isoxaflutole rebenzylation.

[0024] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A stirred tank for isoxaflutole rebenzylation, comprising a stirring motor and a stirring shaft, wherein the stirring motor is mounted outside the stirred tank body, and the stirring shaft extends into the stirred tank body, characterized in that: The output shaft of the stirring motor is connected to the top end of the connecting shaft via a coupling, the bottom end of the connecting shaft is connected to the stirring shaft via a coupling, and the upper and lower ends of the connecting shaft are supported by bearing seats respectively. The portion of the stirring shaft that extends into the mixing vessel body is connected to stirring blades. The stirring blades include anchor-type stirring blades, paddle-type stirring blades, and transverse stirring blades. The paddle-type stirring blades are located between the anchor-type stirring blades and the transverse stirring blades, and the transverse stirring blades are located at the bottom of the stirring shaft. The anchor-type stirring blade has a U-shaped structure, the transverse stirring blade has a horizontal plate structure, and the paddle-type stirring blade consists of a horizontal plate, a first inclined plate, and a second inclined plate. The horizontal plate is connected to the bottom of the stirring shaft, and the first and second inclined plates are respectively connected to the two ends of the horizontal plate. The angle formed by the first and second inclined plates and the horizontal plate is an obtuse angle, and the first and second inclined plates are arranged in parallel.

2. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: A mounting frame is installed on the top of the mixing vessel, the mixing motor is fixedly installed on the top of the mounting frame, and the bearing seat is installed inside the mounting frame.

3. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: The angle between the bottom of the first inclined plate and the horizontal plate is 130-140°, and the angle between the top of the second inclined plate and the horizontal plate is 130-140°.

4. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: The anchor-type stirring blade is installed at the middle position of the stirring shaft.

5. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: The top of the second inclined plate of the paddle-type stirring blade is set lower than the bottom of the anchor-type stirring blade, and the bottom of the first inclined plate is on the same horizontal line as the bottom of the transverse stirring blade.

6. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: The anchor-type stirring blade and the paddle-type stirring blade are welded and fixed to the side of the stirring shaft, and the transverse stirring blade is welded and fixed to the bottom of the stirring shaft.

7. The isoxaflutole rebenzylation stirred tank according to claim 1, characterized in that: The paddle-type stirring blade and the anchor-type stirring blade are respectively provided with sleeves at the middle position. The paddle-type stirring blade and the anchor-type stirring blade are sleeved and fixed on the stirring shaft through the sleeves. The sleeves are fixed to the stirring shaft by welding.

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