Cooling crystallization device for nicosulfuron production

Abstract

The utility model discloses a cooling crystallization device for nicosulfuron production, and relates to the technical field of nicosulfuron production. The reaction kettle comprises a reaction kettle body, a feeding pipe and a discharging pipe are arranged at the top end and the bottom end of the reaction kettle body respectively, and a stirring mechanism is arranged in the reaction kettle body and used for stirring and mixing mixed liquid. When the reaction kettle is used, materials are fed through the feeding pipe, then the temperature of the reaction kettle body is controlled through the control panel, the stirring motor is started to drive the driving gear to rotate, then the two driven gears and the two spline sleeves are driven to synchronously and reversely rotate through the meshing effect, and the two spline shafts and the multiple stirring blades are driven to synchronously and reversely rotate through the two spline sleeves. Through different stirring directions, the stirring effect is improved, materials are conveniently mixed, in the stirring process, liquid at the bottom can be pumped to the upper portion through a water pump, the circulation effect is achieved, and the mixing effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nicosulfuron production, in particular to a cooling crystallization device for nicosulfuron production. Background Art

[0002] Nicosulfuron is an organic compound with the molecular formula C15H18N6O6S. It is a selective herbicide belonging to the sulfonylurea class and is usually used as a post-emergence herbicide to protect corn crops from weeds. Properties: The pure product is colorless crystals; melting point 172-173°C; easily soluble in water; solubility 18g / kg in acetone, 4.5g / kg in ethanol.

[0003] Nicosulfuron is a systemic herbicide that can be absorbed by the stems, leaves and roots of weeds and then transmitted within the plant body, causing sensitive plants to stagnate in growth, their stems and leaves to turn green, and gradually wither and die. Generally, they die within 20-25 days, but it takes a longer time for some perennial weeds under low temperatures. The drug is most effective when applied before the 4-leaf stage after germination, and its efficacy decreases when the seedlings are large. The drug has pre-germination herbicidal activity, but the activity is lower than that after germination.

[0004] When producing Nicosulfuron, the mixed solution needs to be heated and stirred, and then filtered to obtain a yellow solid, and then a white solid is obtained by recrystallization. In the prior art, when stirring, the stirring position is fixed, which is difficult to achieve a good stirring effect, and because a stirring rod is provided, it is also inconvenient to take out the filtered crystallized material, and the use effect is poor. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a cooling crystallization device for the production of Nicosulfuron, so as to solve the problem that the stirring position is fixed during stirring, which makes it difficult to achieve a good stirring effect, and because a stirring rod is provided, it is also inconvenient to take out the material after filtering and crystallizing, resulting in poor use effect.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a cooling crystallization device for the production of Nicosulfuron, comprising a reactor body, the top and bottom of which are respectively provided with a feed pipe and a discharge pipe, a stirring mechanism is provided in the reactor body, the stirring mechanism is used to stir and mix the mixed liquid, a filter plate is provided in the reactor body, the filter plate is connected to the stirring mechanism through a lifting mechanism, the lifting mechanism is used to drive the filter plate to lift, and a control panel is provided on the peripheral outer wall of the reactor body;

[0007] The stirring mechanism comprises two spline sleeves and a driving assembly. Two rotating holes are provided at the top of the reactor body. The two spline sleeves are rotatably installed in the two rotating holes respectively. The two spline sleeves are connected by a driving assembly. Spline shafts are slidably installed in the two spline sleeves. The outer walls of the circumferences of the two spline shafts are provided with stirring assemblies. A circular transmission cavity is provided in the reactor body, and the circular transmission cavity is connected with the two rotating holes.

[0008] The lifting mechanism includes two L-shaped lifting blocks, a lifting assembly and a clamping assembly. An arc-shaped hole is provided on the peripheral outer wall of the reactor body, and a side cover is hingedly installed in the arc-shaped hole. Two lifting grooves are jointly provided on the peripheral inner walls of the reactor body and the side cover. The two L-shaped lifting blocks are respectively slidably arranged in the two lifting grooves through the lifting assembly. The two L-shaped lifting blocks are connected to the filter plate through the clamping assembly. A connecting plate is jointly fixed on the opposite sides of the two L-shaped lifting blocks. The top of the connecting plate is rotatably connected to the bottom ends of the two spline shafts.

[0009] Preferably, the driving assembly includes a stirring motor, which is fixedly mounted on the top of the reactor body, and the output shaft of the stirring motor extends into the circular transmission cavity and is fixedly sleeved with a driving gear, and the circumferential outer walls of the two spline sleeves are fixedly sleeved with driven gears, the two driven gears are meshed and installed, and the driving gear is meshed and installed with one of the driven gears.

[0010] Preferably, the stirring assembly includes a plurality of stirring blades, a storage groove is provided on the circumferential outer wall of the spline shaft, a guide shaft is fixedly installed on the opposite ends of the storage groove, the plurality of stirring blades are slidably mounted on the circumferential outer wall of the guide shaft, and an elastic unit is provided between each two matching stirring blades.

[0011] Preferably, the elastic unit comprises a compression spring, the compression spring is sleeved on the peripheral outer wall of the guide shaft, and two ends of the compression spring are respectively fixedly connected to opposite side portions of the two stirring blades.

[0012] Preferably, a circulation pipe is provided between the peripheral inner wall of the discharge pipe and the peripheral inner wall of the reactor body, a water pump is provided on the circulation pipe, and valves are provided on both the discharge pipe and the circulation pipe.

[0013] Preferably, the lifting assembly includes two screw rods, the top inner walls of the two lifting grooves are provided with through holes, the two screw rods are respectively rotatably installed in the two through holes, the two screw rods are connected by a transmission unit, and the two L-shaped lifting blocks are respectively threadedly installed on the circumferential outer walls of the two screw rods.

[0014] Preferably, the transmission unit includes two interlocking gears, which are respectively fixedly sleeved on the circumferential outer walls of the two screws, and the circumferential inner wall of the circular transmission cavity is rotatably mounted with an annular internal rack, and the two interlocking gears are both meshed with the annular internal rack. A lifting motor is fixedly mounted on the top of the reactor body, and the output shaft of the lifting motor is connected to the top of one of the screws.

[0015] Preferably, the clamping assembly includes two T-shaped sliders, which are respectively fixedly mounted on the bottom of the two L-shaped lifting blocks, and two T-shaped grooves are provided on the top of the filter plate, in which the two T-shaped sliders are respectively slidably disposed.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model can make the two spline sleeves drive two spline shafts and a plurality of stirring blades to rotate synchronously in the opposite directions through the reverse rotation of two driven gears and two spline sleeves. The stirring effect is improved through different stirring directions, and the mixing of materials is convenient. In the stirring process, the liquid at the bottom can be pumped to the top through the water pump to play a circulation role, thereby preventing sedimentation at the bottom and further improving the mixing effect.

[0018] The utility model rotates two screws to make two L-shaped lifting blocks, a connecting plate and a filter plate move upward synchronously, thereby squeezing two spline shafts through the connecting plate and squeezing a stirring blade through the inner wall at the top end of a reaction kettle body, so that the stirring blade is slidably stored in a storage groove to prevent the lifting process from being affected. When the filter plate is lifted to a suitable position, crystallization can be promoted by controlling the temperature of the reaction kettle body, and then the side cover is opened and the filter plate is pulled out to obtain the crystallized material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first perspective;

[0020] Figure 2 It is a schematic diagram of the partial cutaway structure of the reactor body and the side cover of the utility model;

[0021] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 yes Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 It is a partially cutaway enlarged structural schematic diagram of the filter plate of the utility model;

[0024] Figure 6It is a schematic diagram of the explosion structure between the spline shaft and the compression spring of the utility model.

[0025] Figure numerals: 1. Reactor body; 2. Side cover; 3. Spline sleeve; 4. Driven gear; 5. Stirring motor; 6. Driving gear; 7. Spline shaft; 8. Stirring blade; 9. Storage tank; 10. Guide shaft; 11. Compression spring; 12. Circulation pipe; 13. Water pump; 14. L-shaped lifting block; 15. Screw; 16. Linkage gear; 17. Annular inner rack; 18. Lifting motor; 19. Connecting plate; 20. Filter plate; 21. T-shaped slider; 22. T-shaped slide groove; 23. Control panel. DETAILED DESCRIPTION

[0026] 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.

[0027] Figures 1 to 6 It is the best embodiment of the utility model, and the following Figures 1 to 6 The utility model is further described.

[0028] A cooling crystallization device for the production of nicosulfuron comprises a reactor body 1, wherein the top and bottom of the reactor body 1 are respectively provided with a feed pipe and a discharge pipe, a stirring mechanism is provided in the reactor body 1, and the stirring mechanism is used to stir and mix the mixed liquid, a filter plate 20 is provided in the reactor body 1, and the filter plate 20 is connected to the stirring mechanism through a lifting mechanism, and the lifting mechanism is used to drive the filter plate 20 to lift and lower, and a control board 23 is provided on the peripheral outer wall of the reactor body 1, and specifically, the reactor body 1 is a temperature-controlled reactor, and the internal temperature can be adjusted, and the reactor body 1 is electrically connected to the control board 23 through a PLC controller;

[0029] The stirring mechanism includes two spline sleeves 3 and a driving assembly. Two rotating holes are provided at the top of the reactor body 1. The two spline sleeves 3 are rotatably installed in the two rotating holes respectively. The two spline sleeves 3 are connected by the driving assembly. Spline shafts 7 are slidably installed in the two spline sleeves 3. The outer walls of the circumferences of the two spline shafts 7 are provided with stirring assemblies. A circular transmission cavity is provided in the reactor body 1, and the circular transmission cavity is connected with the two rotating holes.

[0030] The lifting mechanism includes two L-shaped lifting blocks 14, a lifting assembly and a clamping assembly. An arc-shaped hole is provided on the peripheral outer wall of the reactor body 1, and a side cover 2 is hingedly installed in the arc-shaped hole. Two lifting grooves are provided on the peripheral inner walls of the reactor body 1 and the side cover 2. The two L-shaped lifting blocks 14 are slidably arranged in the two lifting grooves through the lifting assemblies. The two L-shaped lifting blocks 14 are connected to the filter plate 20 through the clamping assembly. A connecting plate 19 is fixedly arranged on the opposite sides of the two L-shaped lifting blocks 14. The top of the connecting plate 19 is rotatably connected to the bottom ends of the two spline shafts 7.

[0031] The driving assembly includes a stirring motor 5, which is fixedly installed on the top of the reaction kettle body 1. Specifically, the stirring motor 5 is connected to the control board 23 through a PLC controller. The output shaft of the stirring motor 5 extends into the circular transmission cavity and is fixedly sleeved with a driving gear 6. The peripheral outer walls of the two spline sleeves 3 are fixedly sleeved with driven gears 4. The two driven gears 4 are meshed and installed. The driving gear 6 is meshed and installed with one of the driven gears 4. Through the meshing installation of the two driven gears 4, the two spline sleeves 3 can be synchronously rotated in opposite directions, thereby driving the two spline shafts 7 and the two stirring assemblies to rotate synchronously in opposite directions to stir the mixed liquid, thereby improving the mixing effect.

[0032] The stirring assembly includes a plurality of stirring blades 8, a receiving groove 9 is provided on the circumferential outer wall of the spline shaft 7, and a guide shaft 10 is fixedly installed on the opposite ends of the receiving groove 9. The plurality of stirring blades 8 are slidably sleeved on the circumferential outer wall of the guide shaft 10, and an elastic unit is provided between each two matching stirring blades 8. Through the setting of the receiving groove 9, when the spline shaft 7 moves upward, the stirring blades 8 can slide in the receiving groove 9 through the extrusion of the reactor body 1 to prevent jamming.

[0033] The elastic unit includes a compression spring 11. Specifically, the compression spring 11 is a stainless steel spring that can prevent rust and corrosion. The compression spring 11 is sleeved on the outer wall of the circumference of the guide shaft 10. The two ends of the compression spring 11 are respectively fixedly connected to the opposite sides of the two stirring blades 8. Through the setting of the compression spring 11, when the spline shaft 7 moves downward to reset, the elastic action of the compression spring 11 can drive multiple stirring blades 8 to achieve the reset function.

[0034] A circulation pipe 12 is provided between the inner wall of the discharge pipe and the inner wall of the reactor body 1, and a water pump 13 is provided on the circulation pipe 12. Specifically, the water pump 13 and the control board 23 are connected via a PLC controller, and valves are provided on both the discharge pipe and the circulation pipe 12. With this arrangement, during the stirring process, by starting the water pump 13, the liquid at the bottom can flow back to the top through the circulation pipe 12, thereby improving the stirring and mixing effect and preventing precipitation.

[0035] The lifting assembly includes two screw rods 15. The top inner walls of the two lifting grooves are provided with through holes. The two screw rods 15 are rotatably installed in the two through holes respectively. The two screw rods 15 are connected by a transmission unit. The two L-shaped lifting blocks 14 are respectively threadedly installed on the outer walls of the circumference of the two screw rods 15. In this way, the two L-shaped lifting blocks 14 can realize the synchronous lifting function by rotating the two screw rods 15, thereby driving the filter plate 20 to move, which is convenient for material removal operation.

[0036] The transmission unit includes two linkage gears 16, which are respectively fixedly sleeved on the outer walls of the circumference of the two screw rods 15. An annular inner rack 17 is rotatably installed on the inner wall of the circumference of the circular transmission cavity. The two linkage gears 16 are both meshed with the annular inner rack 17. A lifting motor 18 is fixedly installed on the top of the reactor body 1. The output shaft of the lifting motor 18 is connected to the top of one of the screw rods 15. Specifically, the lifting motor 18 is connected to the control board 23 through a PLC controller. In this way, the two screw rods 15 can be driven to rotate synchronously through the meshing action of the two linkage gears 16 and the annular inner rack 17 to prevent jamming.

[0037] The clamping assembly includes two T-shaped sliders 21, which are respectively fixedly installed at the bottom of the two L-shaped lifting blocks 14. Two T-shaped grooves 22 are provided on the top of the filter plate 20. The two T-shaped sliders 21 are respectively slidably arranged in the two T-shaped grooves 22. This arrangement can limit the filter plate 20, and the overall installation and disassembly operations are relatively convenient, which facilitates the material removal operation.

[0038] In summary: when the utility model is in use, the material is put in through the feed pipe, and then the temperature of the reactor body 1 is controlled by the control panel 23, and the stirring motor 5 is started to drive the driving gear 6 to rotate, and then through the meshing action, the two driven gears 4 and the two spline sleeves 3 are driven to rotate synchronously in the opposite direction, and the two spline sleeves 3 drive the two spline shafts 7 and multiple stirring blades 8 to rotate synchronously in the opposite direction. Through different stirring directions, the stirring effect is improved, and the mixing of materials is facilitated. In the stirring process, the liquid at the bottom can be pumped to the top through the water pump 13, which plays a circulation role and further improves the mixing effect.

[0039] After the stirring work is completed, turn off the stirring motor 5, start the lifting motor 18 to drive one of the screws 15 to rotate, and then drive the other screw 15 to rotate synchronously under the meshing action of the two linkage gears 16 and the annular inner rack 17. Through the action of the thread, the two L-shaped lifting blocks 14, the connecting plate 19, and the filter plate 20 move upward synchronously, so that the two spline shafts 7 are squeezed through the connecting plate 19, and the stirring blades 8 are squeezed through the inner wall of the top of the reactor body 1, so that they slide and are stored in the storage groove 9 to prevent the lifting process from being affected. When the filter plate 20 is lifted to a suitable position, the liquid can be discharged through the discharge pipe, and its crystallization is promoted by controlling the temperature of the reactor body 1. Then, the side cover 2 is opened, and the filter plate 20 is pulled out to obtain the crystallized material.

[0040] 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 cooling crystallization device for the production of nicosulfuron, comprising a reaction kettle (1), wherein a feed pipe and a discharge pipe are respectively arranged at the top and bottom of the reaction kettle (1), wherein: The reactor body (1) is provided with a stirring mechanism, the stirring mechanism being used to stir and mix the mixed liquid; the reactor body (1) is provided with a filter plate (20); the filter plate (20) is connected to the stirring mechanism via a lifting mechanism, the lifting mechanism being used to drive the filter plate (20) to move up and down; a control plate (23) is provided on the peripheral outer wall of the reactor body (1); The stirring mechanism comprises two spline sleeves (3) and a driving assembly, the top of the reaction kettle body (1) is provided with two rotating holes, the two spline sleeves (3) are rotatably mounted in the two rotating holes respectively, the two spline sleeves (3) are connected via the driving assembly, a spline shaft (7) is slidably mounted in the two spline sleeves (3), the outer walls of the circumference of the two spline shafts (7) are provided with stirring assemblies, a circular transmission cavity is provided in the reaction kettle body (1), and the circular transmission cavity is communicated with the two rotating holes; The lifting mechanism comprises two L-shaped lifting blocks (14), a lifting assembly and a clamping assembly. An arc-shaped hole is provided on the peripheral outer wall of the reactor body (1), a side cover (2) is hingedly installed in the arc-shaped hole, and two lifting grooves are provided on the peripheral inner walls of the reactor body (1) and the side cover (2). The two L-shaped lifting blocks (14) are respectively slidably arranged in the two lifting grooves through the lifting assembly. The two L-shaped lifting blocks (14) are connected to the filter plate (20) through the clamping assembly. A connecting plate (19) is fixedly arranged on the opposite sides of the two L-shaped lifting blocks (14), and the top of the connecting plate (19) is rotatably connected to the bottom ends of the two spline shafts (7).

2. A cooling crystallization device for the production of Nicosulfuron according to claim 1, characterized in that: The driving assembly comprises a stirring motor (5), the stirring motor (5) being fixedly mounted on the top of the reaction kettle body (1), the output shaft of the stirring motor (5) extending into the circular transmission cavity and being fixedly sleeved with a driving gear (6), the peripheral outer walls of the two spline sleeves (3) being fixedly sleeved with driven gears (4), the two driven gears (4) being meshingly mounted, and the driving gear (6) being meshingly mounted with one of the driven gears (4).

3. A cooling crystallization device for the production of Nicosulfuron according to claim 1, characterized in that: The stirring assembly comprises a plurality of stirring blades (8), a receiving groove (9) is provided on the peripheral outer wall of the spline shaft (7), a guide shaft (10) is fixedly mounted on the opposite ends of the receiving groove (9), the plurality of stirring blades (8) are slidably sleeved on the peripheral outer wall of the guide shaft (10), and an elastic unit is provided between each two matching stirring blades (8).

4. A cooling crystallization device for the production of Nicosulfuron according to claim 3, characterized in that: The elastic unit comprises a compression spring (11), the compression spring (11) being sleeved on the peripheral outer wall of the guide shaft (10), and the two ends of the compression spring (11) being respectively fixedly connected to the opposite side portions of the two stirring blades (8).

5. A cooling crystallization device for the production of Nicosulfuron according to claim 1, characterized in that: A circulation pipe (12) is provided between the inner wall of the discharge pipe and the inner wall of the reactor body (1), a water pump (13) is provided on the circulation pipe (12), and valves are provided on both the discharge pipe and the circulation pipe (12).

6. A cooling crystallization device for the production of Nicosulfuron according to claim 1, characterized in that: The lifting assembly comprises two screw rods (15), the top inner walls of the two lifting grooves are each provided with a through hole, the two screw rods (15) are respectively rotatably mounted in the two through holes, the two screw rods (15) are connected via a transmission unit, and the two L-shaped lifting blocks (14) are respectively threadedly mounted on the peripheral outer walls of the two screw rods (15).

7. A cooling crystallization device for the production of Nicosulfuron according to claim 6, characterized in that: The transmission unit comprises two linkage gears (16), the two linkage gears (16) are respectively fixedly sleeved on the circumferential outer walls of the two screw rods (15), an annular inner rack (17) is rotatably mounted on the circumferential inner wall of the circular transmission cavity, the two linkage gears (16) are both meshedly mounted with the annular inner rack (17), a lifting motor (18) is fixedly mounted on the top end of the reactor body (1), and an output shaft of the lifting motor (18) is connected to the top end of one of the screw rods (15).

8. The cooling crystallization device for producing Nicosulfuron according to claim 1, characterized in that: The clamping assembly comprises two T-shaped sliders (21), the two T-shaped sliders (21) are respectively fixedly mounted on the bottoms of the two L-shaped lifting blocks (14), the top of the filter plate (20) is provided with two T-shaped slide grooves (22), the two T-shaped sliders (21) are respectively slidably disposed in the two T-shaped slide grooves (22).

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