Solution mixing device and process for producing dispersible oil suspending agent

Abstract

The embodiment of the invention relates to the technical field of pesticide preparation production, and provides a solution mixing device and process for production of a dispersible oil suspending agent, the solution mixing device comprises a main kettle body, a central driving shaft extends into a mixing main cavity, and a stirring paddle is arranged at the lower part of the main kettle body; the floating bearing assembly is arranged in the mixing main cavity and can synchronously move along with the lifting of the liquid level; the elastic impact breaking assemblies are distributed along the circumference of the floating bearing assembly, and each elastic impact breaking assembly comprises a fixed seat, an impact arm, an impact hammer and a force storage spring; the trigger transmission assembly is arranged between the center driving shaft and the elastic impact breaking assembly and used for converting the rotating motion of the center driving shaft into the periodic impact motion of the impact arm, and the impact hammer downwards impacts powder aggregates on the liquid level of the mixed liquid. By means of the technical scheme, the technical problem that in the prior art, the adaptability of the mixing strength and the adsorption effect of the auxiliaries is insufficient is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of pesticide formulation production technology, and more specifically, to a solution mixing apparatus and process for producing dispersible oil suspensions. Background Technology

[0002] With the advancement of green agricultural development, oil-dispersible suspensions (OD), as low-pollution and environmentally friendly pesticide formulations, have been widely used in the control of pests, diseases, and weeds in field crops such as rice, wheat, and corn. This formulation uses oil as a carrier to mix water-insoluble pesticide active ingredients with emulsifiers, dispersants, and other adjuvants to form a solid-liquid suspension system. The core requirement is that it can spontaneously disperse after dilution with water, ensuring uniform release of the pesticide's efficacy.

[0003] However, the density of solid particles in pesticide technical materials is significantly greater than that of oil-based carriers. This density difference leads to particle sedimentation and system stratification before product storage or use, directly affecting stability and application efficacy. Solving this problem requires breaking up pesticide particle agglomeration to achieve uniform dispersion and prevent accelerated sedimentation of large particles. It also requires promoting the full adsorption of adjuvants onto the surface of the pesticide particles to form a stable adsorption layer, thereby reducing sedimentation rates through steric hindrance.

[0004] In existing production processes, traditional mechanical mixing devices, such as single-stage stirred tanks and ordinary high-shear mixers, cannot meet the dual requirements mentioned above. The mixing intensity and the adsorption effect of additives are not well matched. When the stirring speed is too slow or the shear intensity is insufficient, it is impossible to break up particle agglomeration and also results in insufficient dispersion of additives, making it difficult to uniformly adsorb onto the particle surface. Unadsorbed particles are prone to re-agglomeration and sedimentation. On the other hand, blindly increasing the stirring speed or shear intensity can refine the particles and promote the diffusion of additives, but excessive mechanical force will destroy the adsorption layer that has been formed, leading to the desorption of additives, and still cannot solve the sedimentation and stratification problem. Summary of the Invention

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a solution mixing device and process for the production of dispersible oil suspensions, which solves the technical problem of insufficient compatibility between mixing intensity and adsorption effect of additives in the prior art.

[0006] According to one aspect, at least one embodiment of this disclosure provides a solution mixing apparatus for the production of a dispersible oil suspension, comprising: The main vessel body has a mixing chamber inside, a discharge valve at the bottom of the mixing chamber, and an upper cover at the top of the main vessel body, on which a feeding assembly is provided. A central drive shaft extends into the main mixing chamber, and a stirring paddle is provided at the bottom. A floating support assembly is disposed within the main mixing chamber and can move synchronously with the rise and fall of the liquid level; An elastic impact crushing assembly is provided, comprising several groups distributed around the circumference of a floating bearing assembly. Each group of elastic impact crushing assemblies includes a fixed base, an impact arm, an impact hammer, and a storage spring. The fixed base is fixed to the bottom of the floating bearing assembly, the impact arm is hinged to the fixed base, the impact hammer is located at the other end of the impact arm, and the storage spring is sleeved on the hinge shaft between the impact arm and the fixed base to provide elastic potential energy for the impact of the impact arm. A trigger transmission assembly is disposed between the central drive shaft and the elastic impact agglomeration component. It is used to convert the rotational motion of the central drive shaft into the periodic impact motion of the impact arm, and the impact hammer impacts the powder agglomerates on the surface of the mixture downward.

[0007] For example, at least one embodiment of this disclosure provides a solution mixing device for the production of dispersible oil suspensions, wherein the floating support component includes a support frame, an annular float and elastic support columns. The support frame is a circular frame structure with a bushing at the center that is clearance-fitted with the central drive shaft. The annular float is coaxially disposed on the edge of the support frame. The elastic support columns are distributed along the circumference of the support frame, and the upper end of the elastic support columns is connected to the support frame, while the lower end is provided with a floating ball. The floating support component floats on the surface of the mixed liquid through the annular float and the floating ball.

[0008] For example, in at least one embodiment of this disclosure, a solution mixing apparatus for producing dispersible oil suspensions is provided, wherein the triggering drive assembly includes: A transmission sleeve is coaxially mounted on the central drive shaft and located above the support frame. The outer wall of the transmission sleeve is uniformly provided with a plurality of triggering protrusions along the circumferential direction, and the triggering protrusions have inclined guide surfaces. A trigger rod, one end of which is fixedly connected to the impact arm, and the other end extends upward and is provided with a rolling wheel, which makes rolling contact with the inclined guide surface; A limiting block is provided on the support frame and located on one side of the impact arm to limit the swing angle of the impact arm.

[0009] For example, at least one embodiment of this disclosure provides a solution mixing device for the production of dispersible oil suspensions, wherein the impact hammer includes a hammer body and an elastic impact head. The hammer body has a circular plate structure, and the elastic impact head is fixed at the lower end of the hammer body. The lower end face of the elastic impact head is provided with conical impact teeth, and there is a flow guiding interval between adjacent conical impact teeth.

[0010] For example, in at least one embodiment of this disclosure, a solution mixing device for producing dispersible oil suspensions is provided, wherein the elastic support column includes an outer tube, an inner rod, and a support spring. The upper end of the inner rod is connected to a support frame, the lower end of the outer tube is connected to a floating ball, the lower end of the inner rod is slidably inserted into the outer tube, and the support spring is sleeved on the outside of the outer tube and the inner rod, with both ends of the support spring abutting against the outer tube and the inner rod, respectively.

[0011] For example, the solution mixing apparatus for producing dispersible oil suspensions provided in at least one embodiment of this disclosure further includes: A shearing and dispersing assembly is disposed within the main mixing chamber and below the stirring paddle. It includes a fixed ring and a rotating shearing disk. The fixed ring is coaxially fixed to the inner wall of the bottom of the main vessel body and has several fixed shearing blades. The rotating shearing disk is coaxially fixed to the stirring paddle and has several rotating shearing blades on its outer wall. The fixed shearing blades and rotating shearing blades are interlaced, and a shearing gap is formed between the cutting edges of the fixed and rotating shearing blades. Both the fixed ring and the rotating shearing disk have several through-holes.

[0012] For example, in at least one embodiment of this disclosure, a solution mixing apparatus for producing dispersible oil suspensions is provided, wherein the rotating shear disks are a plurality of disks uniformly distributed along the central drive shaft.

[0013] For example, the solution mixing apparatus for producing dispersible oil suspensions provided in at least one embodiment of this disclosure further includes: The secondary mixing chamber is a ring structure, coaxially located around the main mixing chamber. The upper end of the secondary mixing chamber is connected to the upper part of the main mixing chamber through several upper connecting channels, and the lower end is connected to the lower part of the main mixing chamber through several lower connecting channels. The secondary mixing chamber is equipped with several circumferentially distributed baffles, which are set at an angle to the inner wall of the secondary mixing chamber.

[0014] For example, in at least one embodiment of this disclosure, a solution mixing apparatus for producing dispersible oil suspensions is provided, wherein the inlet of the upper connecting channel faces the main mixing chamber, and the outlet is connected to the upper part of the secondary mixing chamber. The upper connecting channel is provided with a one-way valve, which only allows the mixture to flow from the main mixing chamber to the secondary mixing chamber; the inlet of the lower connecting channel is connected to the lower part of the secondary mixing chamber, and the outlet faces the center of the main mixing chamber. The outlet of the lower connecting channel is provided with a spray nozzle, and the spray direction of the spray nozzle is set at an angle to the axis of the central drive shaft.

[0015] For example, the solution mixing apparatus for producing dispersible oil suspensions provided in at least one embodiment of this disclosure further includes: A delivery pump, connected to the injection nozzle, is used to pump the mixture.

[0016] According to another aspect, at least one embodiment of this disclosure provides a mixing process for mixing dispersible oil suspensions using the solution mixing apparatus for producing dispersible oil suspensions.

[0017] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the floating support component can move synchronously with the rise and fall of the liquid level, always remaining on the surface of the mixture, providing a dynamic support platform for the elastic impact agglomeration breaking component. Under the action of the trigger transmission component, the elastic impact agglomeration breaking component periodically impacts the powder agglomerates on the surface of the mixture, breaking up particle agglomerates and ensuring uniform dispersion of the active pharmaceutical ingredient particles. Simultaneously, the stirring action of the agitator promotes the diffusion of the adjuvant in the mixture, while the impact action of the agglomeration breaking component helps the adjuvant fully adsorb onto the surface of the active pharmaceutical ingredient particles, forming a stable adsorption layer. This reduces the settling velocity through steric hindrance, thereby solving the problems of particle settling and system stratification before product storage or use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the solution mixing device in one embodiment of the present disclosure; Figure 2 for Figure 1 A top view of the solution mixing device in the embodiment; Figure 3 for Figure 2 Schematic diagram of the sectional structure of the middle AA section; Figure 4 for Figure 3 A magnified schematic diagram of the partial structure of B in the middle section; Figure 5 for Figure 3 A magnified schematic diagram of the C-shaped structure. Figure 6 for Figure 1 A cross-sectional view of the trigger transmission assembly in the embodiment; In the figure: Main vessel body (10), mixing main chamber (11), discharge valve (12), upper cover (13), feeding assembly (14), central drive shaft (20), stirring paddle (22), floating bearing assembly (30), bearing frame (31), annular float (32), elastic support column (33), outer tube (331), inner rod (332), support spring (333), bushing (34), floating ball (35), elastic impact crushing assembly (40), fixed seat (41), impact arm (42), impact hammer (43), hammer body (431), elastic impact head (432), conical impact Tooth (433), flow guide interval (434), energy storage spring (44), trigger transmission assembly (50), transmission sleeve (51), trigger protrusion (52), inclined guide surface (521), trigger rod (53), rolling wheel (54), limit block (55), secondary mixing chamber (60), upper connecting channel (61), one-way valve (611), lower connecting channel (62), spray nozzle (621), baffle (63), shear dispersion assembly (70), fixing ring (71), rotating shear disc (72), fixed shear blade (73), rotating shear blade (74), diversion hole (75). Detailed Implementation

[0020] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0023] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-6 The diagram illustrates a solution mixing device for producing a dispersible oil suspension according to an embodiment of this disclosure. It includes a main vessel 10, with a mixing chamber 11 inside. A discharge valve 12 is located at the bottom of the mixing chamber 11. An upper cover 13 is located at the top of the main vessel 10, and a feeding assembly 14 is mounted on the upper cover 13. A central drive shaft 20 extends into the mixing chamber 11, and a stirring paddle 22 is located at the bottom of the mixing chamber 11 and is capable of moving synchronously with the liquid level. Several sets of elastic impact agglomeration breaking components 40 are evenly distributed along the circumference of the floating support assembly 30. Each set of elastic impact agglomeration breaking components 40 includes a solid... The assembly includes a fixed base 41, an impact arm 42, an impact hammer 43, and a storage spring 44. The fixed base 41 is fixed to the bottom of the floating bearing assembly 30. The impact arm 42 is hinged to the fixed base 41. The impact hammer 43 is located at the other end of the impact arm 42. The storage spring 44 is sleeved on the hinge shaft between the impact arm 42 and the fixed base 41 and is used to provide the impact arm 42 with elastic potential energy for impact. The trigger transmission assembly 50 is located between the central drive shaft 20 and the elastic impact agglomeration assembly 40 and is used to convert the rotational motion of the central drive shaft 20 into the periodic impact motion of the impact arm 42. The impact hammer 43 impacts the powder agglomerates on the surface of the mixture downward.

[0027] like Figure 4As shown, the floating load-bearing assembly 30 includes a load-bearing frame 31, an annular float 32, and elastic support columns 33. The load-bearing frame 31 is a circular frame structure with a bushing 34 at the center that is clearance-fitted with the central drive shaft 20. The annular float 32 is coaxially arranged around or below the edge of the load-bearing frame 31. The elastic support columns 33 are evenly distributed along the circumference of the load-bearing frame 31, and the upper end of the elastic support column 33 is connected to the load-bearing frame 31, while the lower end is provided with a floating ball 35. The floating load-bearing assembly 30 floats on the surface of the mixed liquid through the annular float 32 and the floating ball 35.

[0028] like Figure 4 , Figure 6 As shown, the trigger transmission assembly 50 includes a transmission sleeve 51, a trigger protrusion 52, a trigger rod 53, and a limiting block 55. The transmission sleeve 51 is coaxially mounted on the central drive shaft 20 and located above the support frame 31. The outer wall of the transmission sleeve 51 is uniformly provided with a plurality of trigger protrusions 52 along the circumference. The trigger protrusions 52 have an inclined guide surface 521. One end of the trigger rod 53 is fixedly connected to the impact arm 42, and the other end extends upward and is provided with a rolling wheel 54. The rolling wheel 54 rolls in contact with the inclined guide surface 521. The limiting block 55 is mounted on the support frame 31 and located on one side of the impact arm 42 to limit the swing angle of the impact arm 42.

[0029] When the central drive shaft 20 drives the transmission sleeve 51 to rotate, the inclined guide surface 521 of the triggering protrusion 52 pushes the rolling wheel 54, thereby driving the impact arm 42 to overcome the elastic force of the storage spring 44 and thus flip. When the rolling wheel 54 disengages from the triggering protrusion 52, the impact arm 42 swings rapidly under the action of the storage spring 44, and the impact hammer 43 impacts the powder agglomerates in the mixture.

[0030] For example, the main vessel body 10 is cylindrical in shape, and its structural strength can withstand the pressure during the mixing process. The mixing main chamber 11, as the core space of the main vessel body 10, has a smooth interior to reduce material residue during the mixing process. The discharge valve 12 is installed at the bottom of the mixing main chamber 11, and the upper cover 13 is tightly connected to the top of the main vessel body 10 by bolts, with a rubber sealing ring at the connection to ensure sealing performance. The feeding assembly 14 includes multiple feed ports for feeding different raw materials such as pesticide technicals, oil carriers, emulsifiers, and dispersants. The feed ports are equipped with flow regulating valves to precisely control the feeding speed of each raw material.

[0031] The top of the central drive shaft 20 is connected to the drive motor via a coupling, and the drive motor provides stable power to rotate the central drive shaft 20. The stirring paddle 22 is installed at the lower part of the central drive shaft 20 and is used for mixing different materials.

[0032] The support frame 31 of the floating support assembly 30 is a circular frame structure. The bushing 34 at the center is clearance-fitted with the central drive shaft 20 to ensure that the support frame 31 can float freely relative to the central drive shaft 20, while also ensuring a certain degree of coaxiality.

[0033] The annular float 32 has good buoyancy and chemical resistance. The annular float 32 is fixed to the lower edge of the support frame 31 to ensure a firm connection.

[0034] The elastic support columns 33 are evenly distributed along the circumference of the support frame 31. The upper end of the elastic support column 33 is connected to the support frame 31, and the floating ball 35 installed at the lower end is made of polyurethane, which has good elasticity and wear resistance. The connection between the floating ball 35 and the elastic support column 33 facilitates installation and replacement.

[0035] The mounting base 41 of the elastic impact crushing assembly 40 is fixed to the bottom of the support frame 31 and can withstand the force generated by the impact arm 42 during movement.

[0036] One end of the impact arm 42 is hinged to the fixed seat 41 via a pin, and the impact hammer 43 is installed at the other end of the impact arm 42, which can effectively impact powder agglomerates.

[0037] The energy storage spring 44 is sleeved on the hinge shaft between the impact arm 42 and the fixed seat 41, and can act on the impact arm 42. By adjusting the energy storage spring 44, the impact of the impact arm 42 is realized, thereby acting on the powder agglomerates.

[0038] The transmission sleeve 51 of the trigger transmission assembly 50 is coaxially mounted on the central drive shaft 20, located above the support frame 31. The inner diameter of the transmission sleeve 51 is interference-fitted with the central drive shaft 20 to ensure synchronous rotation. Multiple trigger protrusions 52 are evenly distributed circumferentially on the outer wall of the transmission sleeve 51, and these protrusions 52 are fixed to the transmission sleeve 51. The trigger protrusions 52 have an inclined guide surface 521, which can effectively push the rolling wheel 54, thereby achieving the flipping of the impact arm 42.

[0039] One end of the trigger rod 53 is fixed to the impact arm 42, and the other end extends upward and is fitted with a rolling wheel 54. The rolling wheel 54 has good wear resistance and rolling performance, and makes rolling contact with the inclined guide surface 521. Under the push of the trigger protrusion 52, it drives the impact arm 42 to overcome the elastic force of the storage spring 44 and flip over.

[0040] The limiting block 55 is fixed on the support frame 31 and located on one side of the impact arm 42. The limiting block 55 can limit the swing angle of the impact arm 42, ensuring that the impact arm 42 moves within a suitable angle range, thus guaranteeing the impact effect and the safety of the equipment.

[0041] This mixing device achieves effective mixing of various components in a dispersible oil suspension through the coordinated operation of multiple components. The main vessel 10 provides a mixing space, and the central drive shaft 20 drives the stirring paddle 22 to macroscopically agitate the materials, causing them to circulate within the main vessel and promoting initial mixing of the components. The floating support component 30 can move synchronously with the rise and fall of the liquid level, always remaining on the surface of the mixture, providing a dynamic support platform for the elastic impact agglomeration breaking component 40. Under the action of the trigger transmission component 50, the elastic impact agglomeration breaking component 40 periodically impacts the powder agglomerates on the surface of the mixture, breaking up particle agglomerates and uniformly dispersing the active pharmaceutical ingredient particles. At the same time, the stirring action of the stirring paddle promotes the diffusion of the adjuvant in the mixture, while the impact action of the agglomeration breaking component helps the adjuvant fully adsorb onto the surface of the active pharmaceutical ingredient particles, forming a stable adsorption layer. Through the steric hindrance effect, the settling velocity is reduced, thereby solving the problems of particle settling and system stratification before product storage or use.

[0042] The annular float 32 and floating ball 35 of the floating support assembly 30 float on the surface of the mixture using the principle of buoyancy. The annular float 32 provides the main buoyancy, enabling the support frame 31 to remain horizontal on the liquid surface. The elastic support column 33 not only connects the support frame 31 and the floating ball 35, but also acts as a buffer when the mixture fluctuates, ensuring the smooth floating of the support frame 31. The clearance fit between the bushing 34 and the central drive shaft 20 allows the support frame 31 to float freely around the central drive shaft 20, adapting to different liquid levels and the flow state of the mixture.

[0043] The energy storage spring 44 provides the impact arm 42 with elastic potential energy. When the trigger transmission assembly 50 is working, the central drive shaft 20 drives the transmission sleeve 51 to rotate. The inclined guide surface 521 of the trigger protrusion 52 on the transmission sleeve 51 pushes the rolling wheel 54, causing the impact arm 42 to swing against the elastic force of the energy storage spring 44, and the energy storage spring 44 is compressed to store energy. When the rolling wheel 54 disengages from the trigger protrusion 52, the impact arm 42 swings rapidly under the action of the energy storage spring 44, and the impact hammer 43 impacts the powder agglomerates in the mixture. This elastic impact method can effectively break up powder agglomerates without damaging the already formed adsorbent layer, achieving uniform dispersion of the active ingredient particles.

[0044] The trigger transmission assembly 50 converts the rotational motion of the central drive shaft 20 into the periodic impact motion of the impact arm 42. The transmission sleeve 51 rotates synchronously with the central drive shaft 20, and the trigger protrusion 52 on it periodically contacts the rolling wheel 54. The design of the inclined guide surface 521 allows the rolling wheel 54 to smoothly push the impact arm 42 to rotate when it contacts the trigger protrusion 52. The limiting block 55 restricts the swing angle of the impact arm 42, ensuring that the angle and force of the impact arm 42 are relatively stable during each impact, thereby achieving stable and efficient impact on powder agglomerates.

[0045] In some examples, such as Figure 4 As shown, the impact hammer 43 includes a hammer body 431 and an elastic impact head 432. The hammer body 431 is a circular plate or cylindrical structure. The elastic impact head 432 is fixed at the lower end of the hammer body 431. The lower end face of the elastic impact head 432 is provided with conical impact teeth 433, and there is a flow guiding interval 434 between adjacent conical impact teeth 433.

[0046] like Figure 4 As shown, the elastic support column 33 includes an outer tube 331, an inner rod 332, and a support spring 333. The upper end of the inner rod 332 is connected to the bearing frame 31, and the lower end of the outer tube 331 is connected to the floating ball 35. The lower end of the inner rod 332 is slidably inserted into the outer tube 331. The support spring 333 is sleeved on the outside of the outer tube 331 and the inner rod 332, and the two ends of the support spring 333 abut against the outer tube 331 and the inner rod 332 respectively.

[0047] For example, the hammer body 431 is designed as a cylindrical structure, which on the one hand ensures that the hammer body has sufficient mass to generate greater impact energy; on the other hand, the cylindrical structure facilitates connection with the elastic impact head 432 and can maintain good stability when rotating under the drive of the impact arm 42.

[0048] The elastic impact head 432 is fixed to the lower end of the hammer body 431. Its elastic properties enable it to buffer the instantaneous impact force when impacting powder agglomerates, preventing damage to the adsorbent layer already formed on the surface of the drug particles due to excessive impact force. At the same time, the elastic impact head can better conform to powder agglomerates of different shapes, enhancing the impact effect.

[0049] The lower end face of the elastic impact head 432 has conical impact teeth 433, and there is a flow guiding interval 434 between adjacent conical impact teeth 433. The conical impact teeth 433 can concentrate the impact force and effectively penetrate the powder agglomerates to break them up. The flow guiding interval 434 guides the flow of the mixture during the impact process, so that the broken powder particles are quickly dispersed into the surrounding mixture, preventing them from re-agglomerating. For example, when the impact hammer 43 impacts a large powder agglomerate, the conical impact teeth 433 penetrate into the interior of the agglomerate and break it up under the impact force. At the same time, the mixture quickly fills the gaps formed after the agglomerate is broken up through the flow guiding interval 434, so that the broken powder particles are immediately surrounded by the mixture, preventing them from agglomerating again.

[0050] The upper end of the inner rod 332 of the elastic support column 33 is securely connected to the support frame 31 to ensure that the outer tube 331 can slide smoothly on it. Its function is to provide guidance for the outer tube 331 and bear part of the weight from the support frame 31.

[0051] The lower end of the outer tube 331 is connected to the floating ball 35, and the lower end of the inner rod 332 is slidably inserted into the outer tube 331. During operation, the outer tube 331 slides up and down in the inner rod 332 as the liquid surface of the mixture fluctuates and the support frame 31 is displaced, while transmitting the supporting force from the floating ball 35.

[0052] A support spring 333 is sleeved on the outside of the outer tube 331 and the inner rod 332, with its two ends abutting against the outer tube 331 and the inner rod 332, respectively. When the liquid surface of the mixture fluctuates, the support spring 333 can buffer the impact force on the support frame 31, ensuring the smooth floating of the support frame 31. For example, during the mixing process, the stirring paddle 22 causes fluctuations in the mixture, and the floating support assembly 30 will rise and fall accordingly. The support spring 333 absorbs these fluctuations by compressing and extending, preventing the support frame 31 from shaking violently, thereby ensuring that the elastic impact agglomeration breaking assembly 40 can stably impact the powder agglomerates.

[0053] During the production and mixing process of the dispersible oil suspension, the central drive shaft 20 drives the stirring paddle 22 to stir the materials, so that the pesticide technical, oil carrier, emulsifier and dispersant are initially mixed. As the liquid level rises, the floating support component 30 floats on the liquid surface, triggering the transmission component 50 to start working, which drives the elastic impact agglomeration breaking component 40 to impact the powder agglomerates.

[0054] The conical impact teeth 433 of the impact hammer 43 penetrate the powder agglomerates, and under the buffering action of the elastic impact head 432, the agglomerates are broken up. The flow guide interval 434 guides the mixture to quickly disperse the broken particles. At the same time, the support spring 333 of the elastic support column 33 buffers the impact of the mixture fluctuations on the support frame 31, ensuring that the impact hammer 43 stably impacts the powder agglomerates. Throughout the mixing process, all components work together to effectively break up powder agglomerates and promote the full adsorption of additives onto the surface of the active pharmaceutical ingredient particles, thereby improving the stability and product quality of the dispersible oil suspension.

[0055] In some examples, such as Figure 5 As shown, the shearing and dispersing assembly 70 is disposed within the mixing main chamber 11 and located below the stirring paddle 22. It includes a fixing ring 71 and a rotating shearing disk 72. The fixing ring 71 is coaxially fixed to the inner wall of the bottom of the main vessel body 10 and has several fixed shearing blades 73. The rotating shearing disk 72 is coaxially fixed to the central drive shaft 20. The outer wall of the rotating shearing disk 72 has several rotating shearing blades 74. The fixed shearing blades 73 and the rotating shearing blades 74 are staggered, and a shearing gap is formed between the cutting edges of the fixed shearing blades 73 and the cutting edges of the rotating shearing blades 74. Both the fixing ring 71 and the rotating shearing disk 72 have several through-holes 75. The rotating shearing disk 72 is evenly distributed along the axial direction of the central drive shaft 20.

[0056] For example, the outer diameter of the retaining ring 71 is slightly smaller than the inner diameter of the bottom of the main vessel 10, and it is coaxially fixed to the inner wall of the bottom of the main vessel 10 to ensure that it is firmly installed and accurately positioned. Several fixed shearing blades 73 are evenly distributed along the circumference of the retaining ring 71. The fixed shearing blades 73 are triangular in shape and can effectively shear the material. The length of the fixed shearing blades 73 is determined according to the diameter of the retaining ring and the mixing requirements.

[0057] The rotating shear disk 72 is coaxially fixed to the stirring paddle 22 and rotates synchronously with the central drive shaft 20. A plurality of rotating shear blades 74 are evenly arranged along the circumference on the outer wall of the rotating shear disk 72, and the rotating shear blades 74 are fixed to the rotating shear disk 72. The shape of the rotating shear blades 74 matches that of the fixed shear blades 73; they are triangular, and their length is similar to that of the fixed shear blades 73. A plurality of through-holes 75 are provided on the surface of the rotating shear disk 72. The through-holes 75 are circular or elliptical in shape, and their function is to allow the mixture to be diverted through the through-holes during the shearing process, increasing the fluidity and mixing effect of the mixture.

[0058] The rotating shear disks 72 are evenly distributed along the central drive shaft 20, which allows the mixture to be subjected to shear forces in different directions at different levels, further enhancing the mixing effect. For example, the mixture is dispersed under the alternating shearing of the rotating shear blades 74 and the fixed shear blades 73, and then sheared by the next layer of rotating shear disks 72 and the fixed ring 71, where the mixture is subjected to shear forces in the opposite direction, further refining and dispersing it.

[0059] When the central drive shaft 20 drives the rotating shear disk 72 to rotate, the rotating shear blade 74 and the fixed shear blade 73 move alternately, forming a shear gap between their edges. The mixture flows downwards into the shear dispersion assembly 70 under the push of the stirring paddle 22. When passing through the shear gap between the rotating shear blade 74 and the fixed shear blade 73, it is subjected to strong shear force. This shear force can further break down and refine larger particle agglomerates, making the pesticide active ingredient particles more uniformly dispersed in the oil carrier. Simultaneously, the presence of the diversion orifice 75 allows the mixture to be diverted during the shearing process. Mixtures from different paths collide and mix with each other in subsequent flows, increasing the uniformity of the mixture. When the mixture passes through the multi-layer rotating shear disk 72 and the fixed ring 71, it is subjected to shear forces in different directions, further improving the dispersion effect, helping to break up particle agglomerates, and promoting full contact and adsorption between the adjuvant and the active ingredient particles.

[0060] The agitator 22 is positioned above the shear dispersion assembly 70, macroscopically agitating the material and causing it to circulate within the main vessel 10 before being conveyed to the shear dispersion assembly 70. The agitation action of the agitator 22 initially mixes the material, providing the shear dispersion assembly 70 with a certain degree of fluidity and uniformity. Simultaneously, the agitation speed and direction of the agitator 22 also affect the velocity and flow rate of the mixture entering the shear dispersion assembly 70, working in conjunction with the shearing action of the assembly to enhance the mixing effect.

[0061] The elastic impact agglomerator 40 is located near the surface of the mixture, primarily impacting and breaking up powder agglomerates on the surface. The shear dispersion component 70, located at the bottom of the mixture, further refines and disperses the material that has already undergone preliminary mixing and impact breaking. Together, they provide comprehensive processing of the material from the surface to the bottom of the vessel. The elastic impact agglomerator 40 breaks down larger powder agglomerates into smaller particles. These particles, under the action of the agitator 22, enter the shear dispersion component 70, where they are further refined through shear dispersion, improving the uniformity of particle dispersion. This also helps the adsorbents better adhere to the surface of the active pharmaceutical ingredient particles, enhancing the stability of the dispersible oil suspension.

[0062] The multi-layer design of the shear dispersion component 70 and the alternating shearing action of the rotating shear blade 74 and the fixed shear blade 73 can further refine the pesticide technical particles, making the particle size more uniform. After being processed by this mixing device, the particle size is reduced, and compared with the device without the shear dispersion component, the particle dispersion effect is significantly improved, effectively avoiding particle sedimentation and system stratification problems.

[0063] Finer particle size and more uniform dispersion increase the contact area between the active pharmaceutical ingredient and the adjuvant, facilitating more thorough adsorption of the adjuvant onto the surface of the active pharmaceutical ingredient. This allows the adjuvant to function better during storage and use of the dispersible oil suspension, forming a more stable adsorption layer and further improving product stability and application efficacy.

[0064] The synergistic operation of the shear dispersion component 70, the agitator 22, and the elastic impact agglomeration breaking component 40 makes the mixing process more efficient. Within the same production time, it can produce higher quality dispersible oil suspension products, resulting in improved production efficiency compared to traditional mixing devices.

[0065] In some examples, such as Figure 3As shown, it also includes a secondary mixing chamber 60, which is a ring structure and is coaxially located around the main mixing chamber 11. The upper end of the secondary mixing chamber 60 is connected to the upper part of the main mixing chamber 11 through several upper connecting channels 61, and the lower end is connected to the lower part of the main mixing chamber 11 through several lower connecting channels 62. The secondary mixing chamber 60 is provided with several circumferentially distributed baffles 63, and the baffles 63 are set at an angle to the inner wall of the secondary mixing chamber 60.

[0066] The inlet of the upper connecting channel 61 faces the main mixing chamber 11, and the outlet is connected to the upper part of the secondary mixing chamber 60. A one-way valve 611 is installed inside the upper connecting channel 61, allowing the mixture to flow only from the main mixing chamber 11 to the secondary mixing chamber 60. The inlet of the lower connecting channel 62 is connected to the lower part of the secondary mixing chamber 60, and the outlet faces the center of the main mixing chamber 11. A spray nozzle 621 is installed at the outlet of the lower connecting channel 62, and the spray direction of the spray nozzle 621 is angled to the axis of the central drive shaft 20. A delivery pump, connected to the spray nozzle 621, is used to pump the mixture.

[0067] For example, the secondary mixing chamber 60 has a ring structure and is coaxially sleeved on the outside of the main vessel 10. Its inner diameter is larger than the outer diameter of the main vessel 10. The outer diameter is determined according to the actual production site and equipment layout to ensure sufficient mixing space.

[0068] The upper connecting channels 61 are circular pipes, and there are usually several of them, evenly distributed at the upper connection between the main mixing chamber 11 and the secondary mixing chamber 60. The inlet of each upper connecting channel 61 faces the main mixing chamber 11, and the outlet is connected to the upper part of the secondary mixing chamber 60. The upper connecting channel 61 is equipped with a one-way valve 611, which only allows the mixture to flow from the main mixing chamber 11 to the secondary mixing chamber 60, preventing the mixture from flowing back.

[0069] The lower connecting channel 62 is also a circular pipe, with the same number as the upper connecting channel 61, and is evenly distributed at the lower connection between the main mixing chamber 11 and the secondary mixing chamber 60. The inlet of the lower connecting channel 62 is connected to the lower part of the secondary mixing chamber 60, and the outlet faces the center of the main mixing chamber 11. A spray nozzle 621 is provided at the outlet. The spray direction of the spray nozzle 621 is set at an angle of 30° - 45° with the axis of the central drive shaft 20 to enhance the turbulence effect of the mixture in the main vessel body 10.

[0070] The baffles 63 are evenly distributed around the circumference of the secondary mixing chamber 60, and their number is determined according to the diameter of the secondary mixing chamber 60. The baffles 63 are set at an angle of 45° to 60° with the inner wall of the secondary mixing chamber 60, and their length extends from the inner wall of the secondary mixing chamber 60 to a position near the center. The function of the baffles 63 is to disrupt the flow path of the mixture in the secondary mixing chamber 60, so that the mixture forms a complex turbulent state, thereby enhancing the mixing effect.

[0071] During the mixing process, the mixture in the main vessel 10 circulates under the action of the agitator 22. When the mixture rises to the upper part of the main mixing chamber 11, part of the mixture enters the secondary mixing chamber 60 through the one-way valve 611 of the upper connecting channel 61 under the action of the pressure difference. The mixture entering the secondary mixing chamber 60 changes its flow direction under the action of the baffle 63, forming turbulence and increasing the contact and mixing opportunities of the components in the mixture. After mixing in the secondary mixing chamber 60, the mixture is sprayed back to the central area of ​​the main vessel 10 at a certain angle from the spray nozzle 621 through the lower connecting channel 62 under the action of the delivery pump. The mixture sprayed back to the main vessel 10 collides and merges with the original mixture in the main vessel 10, further improving the mixing uniformity.

[0072] The delivery pump can be located outside the main vessel body 10 and connected to the injection nozzle 621 or the lower connecting channel 62 through the main vessel body 10 via a pipeline. When the delivery pump is turned on, the mixture can be sprayed out from the injection nozzle 621.

[0073] The baffle 63 creates complex turbulence in the secondary mixing chamber 60, increasing the relative movement between pesticide particles, oil carriers, and adjuvants, promoting further particle dispersion and uniform adjuvant adsorption. Simultaneously, the mixture sprayed back into the main vessel 10 from the spray nozzle 621 impacts the mixture within the main vessel 10 at a certain angle, disrupting the existing flow equilibrium and initiating a new flow pattern, resulting in more thorough mixing within the main vessel 10. Furthermore, the one-way valve 611 ensures the unidirectional flow of the mixture, allowing it to circulate orderly between the main vessel 10 and the secondary mixing chamber 60, thus improving mixing efficiency.

[0074] The agitator 22 macroscopically stirs the materials within the main vessel 10, providing the power and flow basis for the mixture to enter the secondary mixing chamber 60. The elastic impact agglomerator 40 impacts and breaks up powder agglomerates near the surface of the mixture, allowing the materials to be initially dispersed before entering the secondary mixing chamber 60, which is more conducive to further mixing within the secondary mixing chamber 60. The secondary mixing chamber 60's further mixing and processing of the mixture provides the agitator 22 and the elastic impact agglomerator 40 with a more uniform mixture, forming a virtuous cycle and jointly improving the mixing effect.

[0075] If the device also includes a shear dispersion component 70, the mixture sprayed back from the secondary mixing chamber 60 to the main vessel 10 will pass through the shear dispersion component 70. The shear dispersion component 70 further refines and disperses the mixture initially mixed in the secondary mixing chamber 60, further breaking down particle agglomerates, making the pesticide active ingredient particles more evenly dispersed in the oil carrier, enhancing the adsorption effect of adjuvants, and thus comprehensively improving the quality of dispersible oil suspensions.

[0076] With the secondary mixing chamber 60, the mixture circulates and mixes between the main vessel 10 and the secondary mixing chamber 60. Through the turbulent effect of the baffle 63 and the impact mixing of the injection nozzle 621, the uniformity of the components in the dispersible oil suspension is improved. Compared to mixing only within the main vessel 10, the distribution of components in the product is more uniform, and the particle size consistency is better, effectively avoiding quality problems caused by uneven local component concentrations.

[0077] The complex mixing path and turbulent flow state help to further break up the agglomeration of pesticide particles, increase the contact area between the particles and adjuvants, and allow the adjuvants to be more fully adsorbed onto the surface of the pesticide particles. This not only improves the suspension stability of dispersible oil suspensions, but also enhances the uniformity of pesticide release during use, thereby improving product quality.

[0078] The secondary mixing chamber 60, working in conjunction with other mixing components within the main vessel 10, accelerates the mixing process, enabling the production of higher-quality products within the same production time. Compared to traditional single-chamber mixing devices, this increases production efficiency and meets the demands of modern large-scale production of dispersible oil suspensions.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A solution mixing apparatus for the production of dispersible oil suspensions, characterized in that, include: The main vessel body (10) has a mixing chamber (11) inside. The bottom end of the mixing chamber (11) is provided with a discharge valve (12). The top of the main vessel body (10) is provided with an upper cover (13). The upper cover (13) is provided with a feeding assembly (14). A central drive shaft (20) extends into the mixing chamber (11) and has a stirring paddle (22) at its lower part. A floating support assembly (30) is disposed in the mixing main chamber (11) and can move synchronously with the rise and fall of the liquid level; Elastic impact crushing assembly (40), the elastic impact crushing assembly (40) is in several groups and is distributed around the circumference of the floating bearing assembly (30). Each group of elastic impact crushing assembly (40) includes a fixed base (41), an impact arm (42), an impact hammer (43) and a storage spring (44). The fixed base (41) is fixed to the bottom of the floating bearing assembly (30). The impact arm (42) is hinged to the fixed base (41). The impact hammer (43) is disposed at the other end of the impact arm (42). The storage spring (44) is sleeved on the hinge axis between the impact arm (42) and the fixed base (41) and is used to provide the impact elastic potential energy to the impact arm (42). A trigger transmission assembly (50) is disposed between the central drive shaft (20) and the elastic impact agglomeration breaking assembly (40) to convert the rotational motion of the central drive shaft (20) into the periodic impact motion of the impact arm (42). The impact hammer (43) is used to impact the powder agglomerates on the surface of the mixture downward.

2. The solution mixing apparatus for producing dispersible oil suspensions according to claim 1, characterized in that, The floating support assembly (30) includes a support frame (31), an annular float (32), and an elastic support column (33). The support frame (31) is a circular frame structure with a bushing (34) at the center that is clearance-fitted with the central drive shaft (20). The annular float (32) is coaxially arranged on the edge of the support frame (31). The elastic support column (33) is distributed around the circumference of the support frame (31), and the upper end of the elastic support column (33) is connected to the support frame (31), while the lower end is provided with a floating ball (35). The floating support assembly (30) can float on the surface of the mixed liquid through the annular float (32) and the floating ball (35).

3. The solution mixing apparatus for producing dispersible oil suspensions according to claim 2, characterized in that, The trigger transmission assembly (50) includes: A transmission sleeve (51) is coaxially disposed on the central drive shaft (20) and located above the support frame (31). The outer wall of the transmission sleeve (51) is uniformly provided with a plurality of triggering protrusions (52) along the circumferential direction. The triggering protrusions (52) have inclined guide surfaces (521). A trigger rod (53) is fixedly connected at one end to the impact arm (42), and the other end extends upward and is provided with a rolling wheel (54), which makes rolling contact with the inclined guide surface (521); A limiting block (55) is provided on the support frame (31) and located on one side of the impact arm (42) to limit the swing angle of the impact arm (42).

4. The solution mixing apparatus for producing dispersible oil suspensions according to claim 2, characterized in that, The impact hammer (43) includes a hammer body (431) and an elastic impact head (432). The hammer body (431) is a circular plate structure. The elastic impact head (432) is fixed at the lower end of the hammer body (431). The lower end face of the elastic impact head (432) is provided with a conical impact tooth (433), and there is a flow guiding interval (434) between adjacent conical impact teeth (433).

5. The solution mixing apparatus for producing dispersible oil suspensions according to claim 2, characterized in that, The elastic support column (33) includes an outer tube (331), an inner rod (332), and a support spring (333). The upper end of the inner rod (332) is connected to the bearing frame (31), the lower end of the outer tube (331) is connected to the floating ball (35), the lower end of the inner rod (332) is slidably inserted into the outer tube (331), and the support spring (333) is sleeved on the outside of the outer tube (331) and the inner rod (332), and the two ends of the support spring (333) abut against the outer tube (331) and the inner rod (332) respectively.

6. The solution mixing apparatus for producing dispersible oil suspensions according to claim 1, characterized in that, Also includes: The shearing and dispersing assembly (70) is disposed in the mixing main chamber (11) and located below the stirring paddle (22). It includes a fixed ring (71) and a rotating shearing disk (72). The fixed ring (71) is coaxially fixed on the inner wall of the bottom of the main vessel body (10). The fixed ring (71) is provided with a plurality of fixed shearing blades (73). The rotating shearing disk (72) is coaxially fixed on the stirring paddle (22). The outer wall of the rotating shearing disk (72) is provided with a plurality of rotating shearing blades (74). The fixed shearing blades (73) and the rotating shearing blades (74) are intersected, and a shearing gap is formed between the cutting edge of the fixed shearing blade (73) and the cutting edge of the rotating shearing blade (74). Both the fixed ring (71) and the rotating shearing disk (72) have a plurality of through diversion holes (75).

7. The solution mixing apparatus for producing dispersible oil suspensions according to claim 6, characterized in that, The rotating shear disks (72) are a plurality of disks evenly distributed along the central drive shaft (20).

8. The solution mixing apparatus for producing dispersible oil suspensions according to claim 1, characterized in that, Also includes: The secondary mixing chamber (60) is a ring structure and is coaxially located around the main mixing chamber (11). The upper end of the secondary mixing chamber (60) is connected to the upper part of the main mixing chamber (11) through several upper connecting channels (61), and the lower end is connected to the lower part of the main mixing chamber (11) through several lower connecting channels (62). The secondary mixing chamber (60) is provided with several circumferentially distributed baffles (63), and the baffles (63) are set at an angle to the inner wall of the secondary mixing chamber (60).

9. The solution mixing apparatus for producing dispersible oil suspensions according to claim 8, characterized in that, The inlet of the upper connecting channel (61) faces the main mixing chamber (11), and the outlet is connected to the upper part of the secondary mixing chamber (60). The upper connecting channel (61) is provided with a one-way valve (611), which only allows the mixture to flow from the main mixing chamber (11) to the secondary mixing chamber (60). The inlet of the lower connecting channel (62) is connected to the lower part of the secondary mixing chamber (60), and the outlet faces the center of the main mixing chamber (11). The outlet of the lower connecting channel (62) is provided with a spray nozzle (621). The spray direction of the spray nozzle (621) is set at an angle to the axis of the central drive shaft (20). The channel also includes a delivery pump, which is connected to the spray nozzle (621) and is used to pump the mixture.

10. A solution mixing process, characterized in that, The dispersible oil suspension is mixed using the solution mixing apparatus for producing dispersible oil suspensions according to any one of claims 1 to 9.

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