Nicosulfuron crystallization stirring device

Abstract

The utility model relates to the technical field of nicosulfuron preparation, and discloses a nicosulfuron recrystallization stirring device, which comprises a reaction kettle and a servo motor fixedly arranged at the top of the reaction kettle, the output end of the servo motor is fixedly connected with a rotating shaft, the outer surface of the rotating shaft is fixedly connected with piston cylinders at equal intervals, and the piston cylinders are fixedly connected with the reaction kettle. And a piston rod is slidably connected into the piston barrel in a sealed mode, a stirring plate is fixedly connected to the end face of the piston rod, and a driving assembly is installed in the rotating shaft. Through the arrangement of the driving assembly, when the servo motor drives the rotating shaft to rotate in the reaction kettle, the stirring plate axially rotates in the reaction kettle, the stirring plate transversely slides in the reaction kettle in a reciprocating manner, and the stirring radius is changed at any time, so that a local retention area in a solution can be broken, and dead angles are reduced; the mixing uniformity is further enhanced, so that nicosulfuron crystals can be uniformly distributed in the solution, the crystals are prevented from gathering or caking, and the crystallization quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nicosulfuron preparation, and more specifically to a nicosulfuron recrystallization stirring device. Background Art

[0002] Nicosulfuron is a commonly used herbicide widely used in agricultural production. In order to improve its effectiveness and safety, it is often necessary to make it into solid dosage forms, such as wettable powders or granules. Recrystallization is a common method for preparing high-quality Nicosulfuron powder. Nicosulfuron granules with higher purity can be obtained by dissolving, cooling, crystallizing and filtering in a specific solvent. The recrystallization stirring device is mainly used to keep the solution uniformly mixed during the recrystallization process to promote the formation and uniform distribution of crystals. This device usually includes an agitator (such as a paddle agitator, an anchor agitator or a propeller agitator), a reactor including a heating or cooling function, and a control system for controlling the temperature and stirring speed.

[0003] The stirring shaft in the traditional stirring device is mainly driven by a motor when it rotates. Therefore, when the motor drives the stirring shaft to rotate, the stirring shaft can only stir axially inside the cylinder. Since the stirring radius is fixed, it is easy to produce stirring dead angles when stirring in one direction. Especially for the liquid near the inner wall of the cylinder, the stirring effect is limited, thereby affecting the overall preparation efficiency and quality. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides a nicosulfuron recrystallization stirring device to solve the problems existing in the above background technology.

[0005] The utility model provides the following technical solution: a nicosulfuron recrystallization stirring device, comprising a reaction kettle and a servo motor fixedly installed on the top of the reaction kettle, wherein the output end of the servo motor is fixedly connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to a piston cylinder equidistantly, the interior of the piston cylinder is sealingly and slidably connected to a piston rod, the end surface of the piston rod is fixedly connected to a stirring plate, and a driving component is installed inside the rotating shaft;

[0006] The driving assembly includes a sealing groove opened at the inner center of the rotating shaft, a ventilation pipe is fixedly connected to the end face of the piston cylinder, a connecting pipe is fixedly connected to the surface of the piston cylinder, a sliding column is slidably connected to the internal seal of the sealing groove, a locating bearing is fixedly installed at the inner bottom end of the rotating shaft, a reciprocating screw is fixedly connected to the inner ring of the locating bearing, and a fixing rod is fixedly connected to the outer surface of the reciprocating screw.

[0007] Furthermore, the end face of the fixed rod away from the reciprocating screw is fixedly connected to the inner wall of the reactor, the sealing groove and the sliding column are both square, and a sealing ring is fixedly installed on the outer surface of the sliding column.

[0008] Furthermore, the number of the piston cylinders is eight, and each group of four is equidistantly fixedly connected to both sides of the rotating shaft, and the interiors of each group of four rotating shafts are interconnected through a connecting pipe.

[0009] Furthermore, the diameter of the end surface of the piston rod close to the rotating shaft is larger than the diameter of the other end, and a sealing ring is fixedly installed on the outer surface of the large-diameter end of the piston rod.

[0010] Furthermore, a threaded hole matching the surface of the reciprocating screw is provided at the inner center of the sliding column, and the outer surface of the reciprocating screw is meshedly connected to the inside of the threaded hole.

[0011] Furthermore, two limit blocks are fixedly connected to the inner wall of the sealing groove, and the gap between the two limit blocks is smaller than the width of the sliding column.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model provides a driving assembly. When the servo motor drives the rotating shaft to rotate inside the reactor, the stirring plate will axially rotate inside the reactor. At the same time, the stirring plate will slide back and forth laterally inside the reactor and change the stirring radius at any time. This can break the local retention area in the solution, reduce dead angles, further enhance mixing uniformity, and make the nicosulfuron crystals evenly distributed in the solution, avoid crystal aggregation or agglomeration, and improve the crystallization quality.

[0014] 2. The utility model, by setting a reciprocating screw, when the shaft rotates, the reciprocating screw and the sliding column are engaged, which can drive the sliding column to automatically slide up and down inside the sealing groove. There is no need to install an additional drive motor or other mechanical devices, which simplifies the structure of the equipment, makes the entire system more compact, reduces control complexity, and improves operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the connection between the servo motor, the rotating shaft and the piston cylinder in the utility model;

[0017] Figure 3 It is a cross-sectional view of the driving assembly in the utility model;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle.

[0019] The accompanying drawings are marked as follows: 1. reactor; 2. servo motor; 3. rotating shaft; 4. piston cylinder; 5. piston rod; 6. stirring plate; 8. driving assembly; 81. sealing groove; 82. ventilation pipe; 83. connecting pipe; 84. sliding column; 85. positioning bearing; 86. reciprocating screw; 87. fixing rod. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0021] Figure 1-Figure 4 It is the best embodiment of the utility model, and the following Figure 1-Figure 4 The utility model is further described.

[0022] Specifically, a nicosulfuron recrystallization stirring device comprises a reactor 1 and a servo motor 2 fixedly installed on the top of the reactor 1, wherein the output end of the servo motor 2 is fixedly connected to a rotating shaft 3, a piston cylinder 4 is fixedly connected to the outer surface of the rotating shaft 3 at an equal distance, a piston rod 5 is sealingly and slidably connected to the inside of the piston cylinder 4, a stirring plate 6 is fixedly connected to the end surface of the piston rod 5, and a driving component 8 is installed inside the rotating shaft 3;

[0023] The driving assembly 8 includes a sealing groove 81 opened at the center of the rotating shaft 3, a ventilation pipe 82 is fixedly connected to the end face of the piston cylinder 4, a connecting pipe 83 is fixedly connected to the surface of the piston cylinder 4, the internal sealing sliding connection of the sealing groove 81 is connected to a sliding column 84, a locating bearing 85 is fixedly installed at the bottom end of the rotating shaft 3, the inner ring of the locating bearing 85 is fixedly connected to a reciprocating screw 86, and the outer surface of the reciprocating screw 86 is fixedly connected to a fixing rod 87.

[0024] In this embodiment, by setting a driving component 8, when the servo motor 2 drives the rotating shaft 3 to rotate inside the reactor 1, the stirring plate 6 will rotate axially inside the reactor 1, and at the same time, the stirring plate 6 will slide back and forth laterally inside the reactor 1, which can break the local retention area in the solution, reduce dead corners, and further enhance the mixing uniformity, so that the nicosulfuron crystals can be evenly distributed in the solution, avoid crystal aggregation or agglomeration, and improve the crystallization quality.

[0025] Specifically, the end surface of the fixed rod 87 away from the reciprocating screw 86 is fixedly connected to the inner wall of the reactor 1 , the sealing groove 81 and the sliding column 84 are both square, and a sealing ring is fixedly installed on the outer surface of the sliding column 84 .

[0026] In this embodiment, by setting a reciprocating screw 86, when the rotating shaft 3 rotates, the reciprocating screw 86 engages with the sliding column 84, which can drive the sliding column 84 to automatically slide up and down inside the sealing groove 81. There is no need to install an additional drive motor or other mechanical device, which simplifies the structure of the equipment, makes the entire system more compact, reduces control complexity, and improves operating efficiency.

[0027] Specifically, there are eight piston cylinders 4 , and each group of four piston cylinders 4 are equidistantly fixedly connected to both sides of the rotating shaft 3 , and the interiors of each group of four rotating shafts 3 are interconnected through a connecting pipe 83 .

[0028] In this embodiment, by providing the connecting pipe 83 , the internal air pressure of each piston cylinder 4 can be made equal.

[0029] Specifically, the diameter of the end surface of the piston rod 5 close to the rotating shaft 3 is larger than the diameter of the other end, and a sealing ring is fixedly installed on the outer surface of the large-diameter end of the piston rod 5 .

[0030] In this embodiment, by providing a sealing ring, the sealing performance inside the piston cylinder 4 can be enhanced.

[0031] Specifically, a threaded hole matching the surface of the reciprocating screw 86 is opened at the inner center of the sliding column 84, and the outer surface of the reciprocating screw 86 is meshedly connected to the inside of the threaded hole.

[0032] In this embodiment, the reciprocating screw 86 is engaged with the threaded hole to drive the sliding column 84 to slide back and forth longitudinally.

[0033] Specifically, two limit blocks are fixedly connected to the inner wall of the sealing groove 81 , and the gap between the two limit blocks is smaller than the width of the sliding column 84 .

[0034] In this embodiment, the sliding position of the sliding column 84 can be limited by providing a limit block.

[0035] The working principle and use process of the utility model are as follows: when in use, after placing the material to be stirred into the reactor 1, the servo motor 2 is started to drive the rotating shaft 3 to rotate, and the rotating shaft 3 drives the stirring plate 6 to rotate inside the reactor 1 through the piston cylinder 4 and the piston rod 5. At the same time, the rotating shaft 3 drives the sliding column 84 to rotate on the outer surface of the reciprocating screw 86, and the reciprocating screw 86 is engaged with the threaded hole at the center of the sliding column 84, driving the sliding column 84 to slide up and down inside the sealing groove 81, so that the pressure inside the sealing groove 81 increases or decreases. When the pressure inside the sealing groove 81 increases, the ventilation The pipe 82 and the connecting pipe 83 make the interior of all the piston cylinders 4 under strong pressure, and drive the stirring plate 6 to slide in the direction away from the rotating shaft 3 through the piston rod 5. When the pressure inside the sealing groove 81 decreases, the stirring plate 6 slides in the direction close to the rotating shaft 3, and the cycle is repeated. Therefore, while the stirring plate 6 rotates axially inside the reactor 1, the stirring plate 6 will slide back and forth laterally inside the reactor 1, which can break the local retention area in the solution, reduce dead angles, further enhance mixing uniformity, and make the Nicosulfuron crystals evenly distributed in the solution, avoid crystal aggregation or agglomeration, and improve crystal quality.

[0036] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A nicosulfuron recrystallization stirring device, comprising a reaction kettle (1) and a servo motor (2) fixedly mounted on the top of the reaction kettle (1), characterized in that: The output end of the servo motor (2) is fixedly connected to a rotating shaft (3), the outer surface of the rotating shaft (3) is fixedly connected to a piston cylinder (4) at equal intervals, the interior of the piston cylinder (4) is sealingly and slidably connected to a piston rod (5), the end surface of the piston rod (5) is fixedly connected to a stirring plate (6), and a driving assembly (8) is installed inside the rotating shaft (3); The driving assembly (8) comprises a sealing groove (81) provided at the inner center of the rotating shaft (3); a ventilation pipe (82) is fixedly connected to the end surface of the piston cylinder (4); a connecting pipe (83) is fixedly connected to the surface of the piston cylinder (4); a sliding column (84) is sealingly and slidably connected to the inner part of the sealing groove (81); a locating bearing (85) is fixedly installed at the inner bottom end of the rotating shaft (3); a reciprocating screw (86) is fixedly connected to the inner ring of the locating bearing (85); and a fixing rod (87) is fixedly connected to the outer surface of the reciprocating screw (86).

2. A nicosulfuron recrystallization stirring device according to claim 1, characterized in that: The end surface of the fixed rod (87) away from the reciprocating screw (86) is fixedly connected to the inner wall of the reaction kettle (1), the sealing groove (81) and the sliding column (84) are both square, and a sealing ring is fixedly mounted on the outer surface of the sliding column (84).

3. A nicosulfuron recrystallization stirring device according to claim 1, characterized in that: The number of the piston cylinders (4) is eight, and each group of four is equidistantly fixedly connected to both sides of the rotating shaft (3), and the interiors of each group of four rotating shafts (3) are interconnected via a connecting pipe (83).

4. The nicosulfuron recrystallization stirring device according to claim 1, characterized in that: The diameter of the end surface of the piston rod (5) close to the rotating shaft (3) is larger than the diameter of the other end, and a sealing ring is fixedly mounted on the outer surface of the large-diameter end of the piston rod (5).

5. The nicosulfuron recrystallization stirring device according to claim 1, characterized in that: A threaded hole matching the surface of the reciprocating screw (86) is provided at the inner center of the sliding column (84), and the outer surface of the reciprocating screw (86) is meshedly connected to the inside of the threaded hole.

6. The nicosulfuron recrystallization stirring device according to claim 1, characterized in that: Two limit blocks are fixedly connected to the inner wall of the sealing groove (81), and the gap between the two limit blocks is smaller than the width of the sliding column (84).

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