A preparation method of fenpyrotone suspension concentrate

Abstract

The invention relates to a method for preparing a fenpyroxene suspension, wherein the preparation components include, by mass fraction, 30% fenpyroxene, 3% comb-type polycarboxylate 4913, 1.5% Atlox 4894, 2% polyether block 5500, 4% glycerol, 0.5% magnesium aluminum silicate, 8% silicone oil N100, 2% ammonium sulfate, 0.03% defoamer, 0.15% xanthan gum, 0.2% kason, and the balance is water, the comb-type polycarboxylate 4913 improves steric hindrance, the polyether block 5500 is used to control particle size growth, the silicone oil is used to improve moisture retention, the ammonium sulfate is used to reduce the solubility of fenpyroxene in water, and is combined with glycerol as an antifreeze agent. The invention can effectively improve the quality and production efficiency of the product by controlling the ingredients and their ratios, and uses a one-stop ingredient sand milling equipment to integrate the ingredients, mixing and sand milling functions, thereby improving the space utilization rate and reducing some pipelines, which is conducive to improving production efficiency while reducing costs.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide preparation, and relates to a method for preparing a fenacet-butyl suspension. Background Art

[0002] Suspension concentrates usually contain active ingredients, dispersants, thickeners, anti-precipitants, defoamers, antifreeze agents and solvents. The content of active ingredients is generally 5% to 50%, and the average particle size is generally about 3 microns. It is a new dosage form for pesticide processing. Suspension concentrates are divided into water suspension concentrates and oil suspension concentrates. Water suspension concentrates use water as a solvent. The solid original drug that is insoluble or slightly soluble in water is dispersed in water relatively evenly through ultra-fine grinding with the help of certain additives, forming a highly suspended, flowable and stable liquid-solid system with fine particles.

[0003] The conditions for processing pesticide technical into suspension concentrate are: first, it is insoluble or slightly soluble in water, that is, the solubility in water (20-40℃) is lower than 100mg / L, otherwise the preparation is prone to crystallization during storage; second, it is solid at room temperature. Considering storage requirements, the melting point of the technical should be above 60℃ to avoid melting during sand grinding, causing particle agglomeration and affecting the stability of the preparation; third, the pesticide technical should have good chemical stability in water and not be easy to decompose.

[0004] At present, 30% benzathine suspension is a preparation made by wet sand grinding benzathine, wetting dispersant, thickener, preservative, defoamer and medium water into particles of less than 4 microns and uniformly dispersed in water. The difficulties in the preparation technology of this product include: 1) when the particle size is tested, it is found that its solubility in water is large, and its particle size can only be tested when it is saturated; 2) the physical state of the product is very good, but the wet screening test 75um≥98% does not meet the standard; 3) the product dries very quickly after sand grinding during mass production, is easy to peel, and has poor moisturizing performance; in addition, the batching equipment, mixing equipment and multi-stage sand grinding equipment used to produce suspensions occupy a large space in the workshop, and special material transportation equipment and pipelines need to be built, and the management cost is also relatively high. Summary of the invention

[0005] The present invention aims at the technical problems existing in the above-mentioned method for preparing a fenpyroxil suspension concentrate and proposes a method for preparing a 30% fenpyroxil suspension concentrate with reasonable design, good product quality, high production efficiency and cost reduction.

[0006] In order to achieve the above-mentioned object, the technical scheme adopted by the present invention is a method for preparing a fenpyroxene suspension provided by the present invention, wherein the preparation components, by mass fraction, include 30% fenpyroxene, 3% comb-type polycarboxylate 4913, 1.5% Atlox4894, 2% polyether block 5500, 4% glycerol, 0.5% magnesium aluminum silicate, 8% silicone oil N100, 2% ammonium sulfate, 0.03% defoamer, 0.15% xanthan gum, 0.2% kason, and the balance is water; wherein the comb-type polycarboxylate 4913 is used to increase steric hindrance, the polyether block 5500 is used to control particle size growth, the silicone oil is used to improve moisture retention, the ammonium sulfate is used to reduce the solubility of fenpyroxene in water, and is combined with glycerol as an antifreeze agent;

[0007] The preparation steps are as follows: 1) adding all raw materials into the one-stop batching sand milling equipment, and the one-stop sand milling completes the batching, mixing and multi-stage sand milling operations; 2) homogenizing and stabilizing the sand-milled medicine; 3) inspecting the medicine; 4) packaging; 5) random inspection according to the quality of the outer packaging; 6) storage.

[0008] Preferably, the one-stop batching and sand-grinding equipment comprises a machine frame, on which a batching system is arranged, the batching system comprises a plurality of batching units distributed side by side, the batching unit has a feed end above and a discharge end below, a mixing system connected with the discharge ends of all batching units is arranged below the batching system, a belt stirring mechanism is arranged inside the mixing system, the belt stirring mechanism stirs the material through a circulating transmission, a discharge pipe is arranged at the bottom of the mixing system, a sand-grinding system is arranged below the mixing system, the sand-grinding system comprises a plurality of rod-pin sand-grinding devices connected in series, and one of the rod-pin sand-grinding devices is connected to the discharge pipe.

[0009] Preferably, the batching unit includes a storage hopper, a discharge box is arranged at the bottom of the storage hopper, a horizontal screw feeding mechanism is arranged at one end of the discharge box, a distribution box connected to the discharge box is arranged at the bottom of the discharge box, and a distribution mechanism is arranged near the bottom of the distribution box, a rotating shaft is arranged at the rotation center of the distribution mechanism of all batching units, and a distribution motor is arranged at the power input end of the rotating shaft.

[0010] Preferably, the material distribution mechanism comprises a material distribution plate, the plate surface of the material distribution plate is tangent to the side wall of the material distribution box, and a plurality of material discharge troughs are evenly arranged on the material distribution plate.

[0011] Preferably, the belt stirring mechanism includes a stirring belt having a plurality of through holes, the transmission path of the stirring belt is in a mountain shape and a plurality of pairs of transmission wheels, upper pressure wheels and lower pressure wheels cooperating with the transmission belt are arranged on the transmission path, and a stirring motor is arranged at the power input end of the belt stirring mechanism.

[0012] Preferably, the mixing system comprises a mixing box with an open top and a rectangular cross-section, wherein a plurality of pairs of spaced wheel grooves and shaft grooves distributed between the wheel grooves are provided on the front and rear sides of the mixing box, wherein the wheel grooves and shaft grooves protrude toward the interior of the mixing box, the inner side of the wheel groove is used to install a transmission wheel, and the outer side of the shaft groove is used to install a lower pressure wheel, and a transmission port is provided on the top of the wheel groove and the top surface of the transmission port is lower than the transmission surface of the transmission wheel and the stirring belt.

[0013] Preferably, the inner surface of the stirring belt is provided with a pair of inner sealing belts for sealing the sides of the transmission port, and the outer surface of the stirring belt is provided with a pair of outer sealing belts for sealing the top surface of the transmission port.

[0014] Preferably, the pin-type sanding device comprises a sanding machine box, the sanding machine box comprises a water bath wall sleeve, the water bath wall sleeve is provided with a water inlet pipe and a water outlet pipe, the interior of the sanding machine box is provided with an integrated nine-square grid, the nine-square grids of adjacent sanding machine boxes are connected by a connecting pipe, a pin-rod mechanism is provided in each grid of the nine-square grid, a pulley transmission mechanism is provided at the power input end of the pin-rod mechanism, and a sanding motor is provided at the power input end of the pulley transmission mechanism.

[0015] Preferably, drive cylinders are provided on both sides of the sanding machine box, the telescopic ends of the drive cylinders face upward and are provided with a top cover and a sealing cover for sealing the sanding machine box, the top cover is a groove-type structure and is connected and closed with the sealing cover up and down, the pulley transmission mechanism is arranged between the top cover and the sealing cover, the pulley transmission mechanism includes 9 pulleys corresponding to the nine-square grid, and the 9 pulleys are driven by belts.

[0016] Preferably, the nine-grid comprises nine cylindrical sanding chambers, adjacent sanding chambers are connected via side openings, and a connecting plate for connecting the bottoms of the nine sanding chambers is provided at the bottom of the sanding chamber.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] 1. The present invention provides a method for preparing a fenpyroxene suspension, wherein the imported comb-type polycarboxylate 4913 is selected to improve steric hindrance, and ammonium sulfate is added to reduce the solubility of fenpyroxene in water, which is convenient for particle size detection, and the addition of ammonium sulfate can also be combined with glycerol as an antifreeze agent; polyether block 5500 is added to control particle size growth, which is beneficial to improving the wet screening particle size compliance rate; silicone oil is selected to improve moisture retention, which is beneficial to improving sand milling efficiency. By controlling the ingredients and their ratios, the quality and production efficiency of the product can be effectively improved.

[0019] 2. The preparation method of a fenpyroxil suspension provided by the present invention utilizes a one-stop batching and sand-grinding equipment to integrate batching, mixing and sand-grinding functions, and effectively saves space, improves space utilization, and reduces some pipelines, thereby reducing costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A processing step diagram of a method for preparing a fenpyroxetine suspension concentrate provided in an embodiment;

[0022] Figure 2 A list of ingredients for a method for preparing a fenpyroxil suspension concentrate provided in an embodiment;

[0023] Figure 3 An axonometric view of a one-stop batching sand milling device provided for an embodiment;

[0024] Figure 4 A front view of a one-stop batching sand milling device provided in an embodiment;

[0025] Figure 5 A side view of a one-stop batching sand milling device provided for an embodiment;

[0026] Figure 6 A cross-sectional view of the one-stop batching sand mill provided in the embodiment along the GG direction;

[0027] Figure 7 An axonometric view of a belt stirring mechanism provided in an embodiment;

[0028] Figure 8 A cross-sectional view of the belt stirring mechanism provided in the embodiment along the DD direction;

[0029] Fig. 9 A cross-sectional view of the pin-type sanding device provided in the embodiment along the EE direction;

[0030] Fig.10 An exploded view of a pin-type sanding device provided in an embodiment;

[0031] Fig.11 An axonometric view of a mixing box provided for an embodiment;

[0032] In the above figures:

[0033] 1. Machine station frame;

[0034] 2. Batching system; 21. Batching unit; 22. Storage hopper; 23. Discharging box; 24. Screw feeding mechanism; 25. Distributing box; 26. Distributing mechanism; 261. Distributing plate; 262. Discharging chute; 27. Rotating shaft; 28. Distributing motor;

[0035] 3. Mixing system; 31. Belt stirring mechanism; 311. Stirring belt; 311a. Through hole; 311b. Inner sealing belt; 311c. Outer sealing belt; 312. Transmission wheel; 313. Upper pressing wheel; 314. Lower pressing wheel; 32. Stirring motor; 33. Mixing box; 331. Wheel groove; 332. Shaft groove; 333. Transmission port;

[0036] 4. Sanding system; 41. Pin-type sanding device; 411. Sanding machine box; 412. Water bath wall sleeve; 413. Water inlet pipe; 414. Water outlet pipe; 415. Nine-square grid; 415a. Sanding chamber; 415b. Side port; 415c. Connecting plate; 416. Connecting pipe; 417. Pin-type mechanism; 418. Pulley transmission mechanism; 418a. Pulley; 418b. Belt; 419. Sanding motor; 4110. Driving cylinder; 4111. Top cover; 4112. Cover;

[0037] 5. Discharge pipe. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0040] Examples, such as Figures 1 to 11 As shown, the present invention provides a method for preparing a fenpyroxetine suspension, wherein the preparation components are calculated by mass fraction, such as Figure 1 As shown, it includes 30% benzathine, 3% comb polycarboxylate 4913, 1.5% Atlox4894, 2% polyether block 5500, 4% glycerol, 0.5% magnesium aluminum silicate, 8% silicone oil N100, 2% ammonium sulfate, 0.03% defoamer, 0.15% xanthan gum, 0.2% kason, and the balance is water; its preparation steps are as follows Figure 1As shown: 1) Add all raw materials into the one-stop batching sand mill, and the one-stop sand mill completes the batching, mixing and multi-stage sand milling operations; 2) The sand-milled medicine is homogenized and stabilized; 3) The medicine is inspected; 4) Packing; 5) Random inspection is carried out according to the quality of the outer packaging; 6) Storage.

[0041] Specifically, Figure 2 As shown, benzathine is the active ingredient; comb-type polycarboxylate 4913, Atlox4894 and polyether block 5500 are all wetting and dispersing agents; glycerol is an antifreeze agent, magnesium aluminum silicate is a structural regulator; silicone oil is a moisturizing ingredient; ammonium sulfate is an antifreeze and acidity regulator; xanthan gum is a thickener; and kason is a preservative. By screening the imported comb-type polycarboxylate 4913, the steric hindrance can be increased, and the addition of ammonium sulfate reduces the solubility of benzathine in water, which solves the problem that the particle size of the product can only be detected under saturated conditions. In addition, the added ammonium sulfate can also be combined with glycerol as an antifreeze agent; adding polyether block 5500 to control the particle size growth is beneficial to improve the wet screening particle size compliance rate. In this way, the quality of the product can be effectively improved by controlling the ingredients and their ratios, and the use of silicone oil to improve the moisture retention of the mixed liquid can improve the sand grinding efficiency, which is beneficial to improve production efficiency.

[0042] In order to improve the production efficiency of one-stop batching sand grinding equipment, the one-stop batching sand grinding equipment provided by the present invention includes a machine frame 1, on which a batching system 2 is arranged, the batching system 2 includes a plurality of batching units 21 distributed side by side, and the number of the batching units 21 is not less than the types of batching ingredients; the upper part of the batching unit 21 is a feeding end and the lower part is a discharging end, and a mixing system 3 connected with the discharging ends of all the batching units 21 is arranged below the batching system 2, and a belt stirring mechanism 31 is arranged inside the mixing system 3, and the belt stirring mechanism 31 stirs the material through a circulating transmission, a discharging pipe 5 is arranged at the bottom of the mixing system 3, and a sand grinding system 4 is arranged below the mixing system 3, and the sand grinding system 4 includes a plurality of rod pin sand grinding devices 41 connected in series, and one of the rod pin sand grinding devices 41 is connected to the discharging pipe 5. Among them, each batching unit 21 is used to distribute a raw drug component, and the mixing system 3 mixes all the raw drugs and water entering it, and fully covers the positions corresponding to all the raw drugs under the action of the belt stirring mechanism 31, so that the raw drugs and water are effectively stirred in the mixing system 3. After being stirred and mixed for a certain period of time, the mixed liquid enters the sand grinding system 4 from the discharge pipe 5, and the mixed liquid is sanded in multiple stages by connecting multiple pin-type sand grinding devices 41 in series. In this way, the one-stop batching sand grinding equipment integrates batching, mixing and sand grinding functions, and effectively saves space, improves space utilization, and reduces some pipelines, which is conducive to improving production efficiency while reducing costs.

[0043] In order to improve the batching efficiency, the batching unit 21 provided by the present invention includes a storage hopper 22, a discharge box 23 is arranged at the bottom of the storage hopper 22, a horizontal spiral feeding mechanism 24 is arranged at one end of the discharge box 23, a distribution box 25 connected to the discharge box 23 is arranged at the bottom, and a distribution mechanism 26 is arranged near the bottom of the distribution box 25, and a rotating shaft 27 is arranged at the rotation center of the distribution mechanism 26 of all the batching units 21, and a distribution motor 28 is arranged at the power input end of the rotating shaft 27. Among them, the spiral feeding mechanism 24 plays the role of a valve on the one hand, and on the other hand, it allows a part of the raw materials to enter the distribution box 25 in an orderly manner through the bolt conveying method, and the distribution motor 28 can simultaneously drive all the distribution mechanisms 26 through the rotating shaft 27, and the distribution mechanisms 26 distribute the raw materials in each distribution box 25 into the mixing system 3. It should be noted that each discharge box 23 corresponds to its own screw feeding mechanism 24, so the screw feeding mechanism 24 can correspond to the actual volume of the raw materials in the discharge box 23, which is beneficial to improve the relative accuracy of the proportion when the materials are finally divided.

[0044] Furthermore, the material distribution mechanism 26 includes a material distribution plate 261, the surface of which is tangent to the side wall of the material distribution box 25, and a plurality of material discharge troughs 262 are evenly arranged on the material distribution plate 261. Since the rotating shaft 27 drives all the material distribution mechanisms 26 at the same time, and the specific gravity requirements of each raw material are different, the calibers of the material discharge troughs 262 in different material distribution boxes 25 can be specifically designed according to the material discharge ratio. For example, for raw materials with a smaller proportion, the caliber and depth of the corresponding material discharge troughs 262 are both smaller. In this way, during the synchronous rotation of all the material distribution mechanisms 26, the raw materials entering the mixing system 3 automatically complete the proportioning, so as to achieve the purpose of automatically controlling the proportioning, which is conducive to improving the efficiency of the proportioning.

[0045] In order to improve the mixing efficiency of the mixing system 3, the present invention adopts a belt stirring mechanism 31 with cyclic transmission. Specifically, the belt stirring mechanism 31 includes a stirring belt 311, and a plurality of through holes 311a are arranged on the stirring belt 311. The transmission path of the stirring belt 311 is in the shape of a mountain, and a plurality of pairs of transmission wheels 312, an upper pressure wheel 313 and a lower pressure wheel 314 are arranged on the transmission path to cooperate with the stirring belt 311. The power input end of the belt stirring mechanism 31 is provided with a stirring motor 32. The number of stirring motors 32 can be one pair or multiple pairs. The device preferably adopts two stirring motors, and the two stirring motors are respectively located at the front and rear sides of the mixing box 33 and distributed at both ends of the stirring belt. Among them, the stirring belt 311 adopts a hollow structure to facilitate the passage of the mixed liquid, and the mountain-shaped transmission path, that is, the stirring belt 311 can drive the material to pass through 3 peaks and 5 troughs within the coverage range of the stirring belt 311, so as to increase the potential energy of the material mixing. In addition, the through holes 311a also play the role of shearing fluid, thereby improving the mixing efficiency of the material. The stirring belt 311 is pressed by the upper pressing wheel 313 and the lower pressing wheel 314 , so as to improve the tensioning performance of the stirring belt 311 and the transmission efficiency of the stirring belt 311 .

[0046] In order to improve the utilization rate of the mixing system 3, the mixing system 3 provided by the present invention includes a mixing box 33 with an open top and a rectangular cross-section, and the front and rear sides of the mixing box 33 are provided with multiple pairs of spaced wheel grooves 331 and shaft grooves 332 distributed between the wheel grooves 331. The wheel grooves 331 and the shaft grooves 332 protrude toward the interior of the mixing box 33, the inner side of the wheel groove 331 is used to install the transmission wheel 312, and the outer side of the shaft groove 332 is used to install the lower pressure wheel 314. The top of the wheel groove 331 is provided with a transmission port 333, and the top surface of the transmission port 333 is lower than the transmission surface of the transmission wheel 312 and the stirring belt 311. Among them, the transmission wheel 312 as the main transmission structure is located outside the mixing box 33, but its top can pass through the transmission port to cooperate with the stirring belt 311 for transmission. On the one hand, this prevents the transmission wheel 312 from contacting the fluid and increasing the transmission load of the stirring motor 32. On the other hand, it can prevent the fluid from entering the transmission gap between the transmission wheel 312 and the stirring motor 32 and affecting the working performance and working life of the stirring motor 32; the upper pressure wheel 313 and the lower pressure wheel 314 are both located inside the mixing box 33 to directly contact and transmit with the stirring belt 311, which can assist the transmission wheel 312 to make the stirring belt 311 form a mountain-shaped transmission path, thereby achieving better stirring performance.

[0047] In order to improve the sealing performance of the mixing and stirring on the transmission path, the present invention is provided with a pair of inner blocking sealing belts 311b for sealing the side of the transmission port on the inner surface of the stirring belt 311, and a pair of outer blocking sealing belts 311c for sealing the top surface of the transmission port on the outer surface of the stirring belt 311. In this way, the inner blocking sealing belt 311b and the outer blocking sealing belt 311c can make a certain live seal on the assembly gap near the transmission port without affecting the transmission performance and stirring performance of the stirring belt 311. Although the height of the fluid is lower than the transmission port 333 in practice, this can prevent the large-scale leakage of the fluid rolled up by the stirring belt 311 due to its own transmission, thereby improving the working sealing performance of the mixing box 33 and the belt transmission mechanism.

[0048] In order to improve the sanding efficiency of the sanding system 4, the pin-type sanding device 41 provided by the present invention adopts the form of multiple pins and multiple chambers to sand the mixed medicine. Specifically, the pin-type sanding device 41 includes a sanding machine box 411, the sanding machine box 411 includes a water bath wall sleeve 412, and the water bath wall sleeve 412 is provided with a water inlet pipe 413 and a water outlet pipe 414. The inside of the sanding machine box 411 is provided with an integrally connected nine-square grid 415, and the nine-square grids 415 of adjacent sanding machine boxes 411 are connected through a connecting pipe 416, and the connecting pipe 416 is provided with a control valve. A pin mechanism 417 is provided in each grid of the nine-square grid 415, and a pulley transmission mechanism 418 is provided at the power input end of the pin mechanism 417, and a sanding motor 419 is provided at the power input end of the pulley transmission mechanism 418. Among them, the sanding motor 419 drives the pulley transmission mechanism 418 to input power to all the rod pin mechanisms 417, and all the rod pin mechanisms 417 sand the medicine in the nine-square grid 415, and each grid of the nine-square grid 415 is interconnected, so that the medicine can be fully distributed in the nine-square grid 415, so that the actual rod pin working area is effectively increased, and if a non-transmission obstacle occurs in one of the rod pin mechanisms 417, it will not affect the working performance of other rod pin mechanisms 417, and the entire rod pin sanding device 41 can maintain a relatively stable working flow, providing the medicine to be sanded for the next level of rod pin sanding device 41. This device uses at least three rod pin sanding devices 41, and after these three rod pin sanding devices 41 are connected in series, three-level sanding can be achieved, so that the medicine is fully sanded, and due to the improvement of the medicine composition of the present invention, the sanding efficiency of the entire sanding system 4 is improved. Furthermore, the pin-type sanding device 41 can cool the working range of the pin mechanism 417 by a water bath. The contact surface between the water bath wall sleeve 412 and the nine-square grid 415 is large, and can fully contact the outer walls of all the grids of the nine-square grid 415, which is beneficial to improving the working performance of the pin mechanism 417 and avoiding excessive temperature that affects product quality. Therefore, it also has positive significance in ensuring the quality of pharmaceutical products.

[0049] In order to facilitate the cleaning of the rod pin mechanism 417 and the nine-square grid 415, the present invention is provided with a driving cylinder 4110 on both sides of the sand mill box 411, the telescopic end of the driving cylinder 4110 is upward and is provided with a top cover 4111 and a cover 4112 for sealing the sand mill box 411, the top cover 4111 is a groove-shaped structure and it is connected and closed with the cover 4112 up and down, the pulley transmission mechanism 418 is arranged between the top cover 4111 and the cover 4112, the sand mill motor 419 is arranged on the outer top of the cover 4112, and the pulley transmission mechanism 418 includes 9 pulleys corresponding to the nine-square grid 415, and the 9 pulleys are driven by belts. Among them, the top cover 4111 and the cover 4112 not only serve as the sealing structure of the sand mill box 411, but also serve as the transmission box of the pulley transmission mechanism 418. In this way, the top cover 4111, the cover 4112, the pulley transmission mechanism 418 and all the pin mechanisms 417 can be lifted and lowered by the extension of the drive cylinder 4110, thereby achieving the purpose of separating the pin mechanisms 417 from the nine-square grid 415, so as to facilitate cleaning and daily maintenance. Regarding the 9 pulleys, the 9 pulleys include 1 central pulley, 2 intermediate driven pulleys and 2 rows of 6 end drive pulleys. The intermediate drive pulleys and the central pulley are driven by a first belt, and each end drive pulley is driven by a second belt. The central pulley has at least three pulley grooves 331, while the intermediate driven pulleys and the end driven pulleys each have one pulley groove 331, and the belts driven by the intermediate driven pulleys and the 2 rows of end driven pulleys complement each other.

[0050] In order to improve the sanding efficiency, the nine-grid 415 provided by the present invention includes nine cylindrical sanding chambers 415a, and the adjacent sanding chambers 415a are connected through side ports 415b. The bottom of the sanding chamber 415a is provided with a connecting plate 415c for connecting the bottoms of the nine sanding chambers. In this way, each grid, i.e., sanding chamber 415a, can be effectively connected, which not only provides favorable conditions for completing the pin sanding inside itself, but also enables the adjacent pin sanding devices to achieve fluid communication, thereby completing the multi-stage sanding operation and ensuring the quality of the final product.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the present invention 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 and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a fenpyroxil suspension concentrate, wherein the preparation ingredients, by mass fraction, include fenpyroxil, characterized in that: It also includes 3% comb-type polycarboxylate 4913, 1.5% Atlox4894, 2% polyether block 5500, 4% glycerol, 0.5% magnesium aluminum silicate, 8% silicone oil N100, 2% ammonium sulfate, 0.03% defoamer, 0.15% xanthan gum, 0.2% kason, and the balance is water; wherein the comb-type polycarboxylate 4913 is used to increase steric hindrance, the polyether block 5500 is used to control particle size growth, the silicone oil is used to improve moisture retention, the ammonium sulfate is used to reduce the solubility of fenpyroxene in water, and is combined with glycerol as an antifreeze agent; The preparation steps are as follows: 1) adding all raw materials into a one-stop batching sand mill, which completes batching, mixing and multi-stage sand milling operations; 2) homogenizing and stabilizing the sand-milled agent; 3) inspecting the agent; 4) packaging; 5) sampling the outer packaging quality; 6) warehousing; The one-stop batching sand milling equipment comprises a machine frame, a batching system is arranged on the machine frame, the batching system comprises a plurality of batching units distributed side by side, a feeding end is arranged above the batching unit and a discharging end is arranged below the batching unit, a mixing system connected with the discharging ends of all the batching units is arranged below the batching system, a belt stirring mechanism is arranged inside the mixing system, the belt stirring mechanism stirs the material through a circulating transmission, a discharging pipe is arranged at the bottom of the mixing system, a sand milling system is arranged below the mixing system, the sand milling system comprises a plurality of rod pin sand milling devices connected in series, and one of the rod pin sand milling devices is connected to the discharging pipe; The batching unit comprises a storage hopper, a discharge box is arranged at the bottom of the storage hopper, a horizontal spiral feeding mechanism is arranged at one end of the discharge box, a distribution box connected to the discharge box is arranged at the bottom of the discharge box, a distribution mechanism is arranged at a position close to the bottom of the distribution box, a rotating shaft is arranged at the rotation center of the distribution mechanism of all batching units, and a distribution motor is arranged at the power input end of the rotating shaft; the distribution mechanism comprises a distribution plate, the plate surface of the distribution plate is tangent to the side wall of the distribution box, and a plurality of discharge troughs are evenly arranged on the distribution plate; The belt stirring mechanism comprises a stirring belt, a plurality of through holes are arranged on the stirring belt, a transmission path of the stirring belt is in a mountain shape and a plurality of pairs of transmission wheels, an upper pressure wheel and a lower pressure wheel are arranged on the transmission path for transmission cooperation with the stirring belt, and a stirring motor is arranged at the power input end of the belt stirring mechanism; The mixing system comprises a mixing box with an open top and a rectangular cross section, wherein a plurality of pairs of wheel grooves and shaft grooves distributed between the wheel grooves are arranged on the front and rear sides of the mixing box, wherein the wheel grooves and shaft grooves protrude toward the inside of the mixing box, wherein the inner side of the wheel groove is used to install a transmission wheel, and the outer side of the shaft groove is used to install a lower pressure wheel, wherein a transmission port is arranged on the top of the wheel groove, and the top surface of the transmission port is lower than the transmission surface of the transmission wheel and the stirring belt; The pin-type sanding device comprises a sanding machine box, the sanding machine box comprises a water bath wall sleeve, the water bath wall sleeve is provided with a water inlet pipe and a water outlet pipe, the interior of the sanding machine box is provided with an integrally connected nine-square grid, the nine-square grids of adjacent sanding machine boxes are connected by a connecting pipe, a pin-rod mechanism is provided in each grid of the nine-square grid, a pulley transmission mechanism is provided at the power input end of the pin-rod mechanism, and a sanding motor is provided at the power input end of the pulley transmission mechanism.

2. The method for preparing a fenpyroxil suspension concentrate according to claim 1, wherein: The inner surface of the stirring belt is provided with a pair of inner sealing belts for sealing the side surfaces of the transmission port, and the outer surface of the stirring belt is provided with a pair of outer sealing belts for sealing the top surface of the transmission port.

3. The method for preparing a fenpyroxil suspension concentrate according to claim 1, characterized in that: Driving cylinders are arranged on both sides of the sanding machine box, the telescopic ends of the driving cylinders face upward and are provided with a top cover and a sealing cover for sealing the sanding machine box, the top cover is a groove-shaped structure and is connected and closed with the sealing cover up and down, the pulley transmission mechanism is arranged between the top cover and the sealing cover, the pulley transmission mechanism includes 9 pulleys corresponding to the nine-square grid, and the 9 pulleys are driven by belts.

4. The method for preparing a fenpyroxil suspension concentrate according to claim 3, wherein: The nine-grid comprises nine columnar sanding cavities, and the adjacent sanding cavities are connected through side openings. A connecting plate for connecting the bottoms of the nine sanding cavities is arranged at the bottom of the sanding cavities.

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