Online liquid preparation device and method for polyacrylamide dry powder agent
By using a liquid volume sensor and composite stirring technology in the online liquid preparation device, the problems of inaccurate dosage and uneven mixing during the preparation of polyacrylamide dry powder were solved, achieving precise ratio of agent to water and efficient stirring, thus improving the quality of liquid preparation and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ENMAN TECH BEIJING
- Filing Date
- 2026-04-09
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, the manual dosage of polyacrylamide dry powder is inaccurate during the preparation process, resulting in uneven mixing and low efficiency. In addition, traditional stirring equipment does not mix thoroughly, which affects the efficacy of the drug.
An online liquid preparation device is adopted, which monitors the liquid volume through a liquid volume sensor and controls the injector to accurately dispense the agent. Combined with a rotating component and a uniform plate for compound stirring, it achieves closed-loop precise mixing ratio of agent and water and all-round stirring.
It achieves precise mixing ratio of reagents and water, improves mixing uniformity and dissolution efficiency, reduces reagent waste, increases production efficiency, simplifies equipment structure, and reduces failure rate.
Smart Images
Figure CN122098339A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dosing equipment technology, and in particular to an online dispensing device and method for polyacrylamide dry powder. Background Technology
[0002] Polyacrylamide dry powder is a high-molecular polymer made from acrylamide monomers through polymerization. It typically appears as white granules or powder and possesses multiple functions such as thickening, flocculation, and drag reduction. It is widely used in numerous industrial fields, including wastewater treatment, oil extraction, papermaking, and textiles. In practical applications, polyacrylamide dry powder cannot be used directly; it must first be dissolved in a specific liquid (such as water) at a certain ratio to prepare a solution with a specific concentration and viscosity to meet the performance requirements of different processes. Therefore, the solution preparation stage is crucial for the effective application of polyacrylamide dry powder.
[0003] Currently, the traditional method for preparing polyacrylamide dry powder solutions involves manually adding the dosage to the liquid. However, this method makes it difficult to accurately add the dosage based on the actual liquid volume, easily resulting in over- or under-dosing. Over-dosing leads to incomplete dissolution, forming clumps or sediment, wasting the agent and potentially affecting subsequent processes. Under-dosing fails to achieve the desired efficacy, failing to meet actual production needs. Furthermore, after addition, the solution requires stirring to promote powder dissolution and uniform mixing. However, traditional mixing equipment has significant shortcomings in this process, resulting in insufficient mixing and uneven blending of the powder and liquid, thus affecting preparation efficiency. Therefore, these methods are inadequate and fail to meet user requirements, necessitating further improvement.
[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an online liquid preparation device and method for polyacrylamide dry powder, in order to achieve a more practical purpose. Summary of the Invention
[0005] The purpose of this invention is to solve the problems of inaccurate dosage of polyacrylamide dry powder preparation by manual dosing, uneven mixing of dry powder and liquid, and low preparation efficiency.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An online dispensing device for polyacrylamide dry powder includes a base, a frame mounted on the base, a dispensing mechanism mounted on the frame, and a lifting assembly and a transmission mechanism mounted on the frame. The dispensing mechanism includes a transposition assembly fixed on the frame, the transposition assembly being provided with a liquid volume sensing assembly for monitoring the liquid volume, and a dispensing device for dispensing polyacrylamide dry powder, the liquid volume sensing assembly including a dispensing cylinder. The transmission mechanism includes a drive gear, with a transmission rack meshing on both the left and right sides of the drive gear. A rotating component is fixedly connected to the bottom of the transmission rack, and a uniform component is fixedly connected to the bottom of the drive gear, with the lower end of the uniform component passing through the rotating component. The rotating assembly includes a sealing cover. During operation, the lifting assembly moves the sealing cover down and onto the liquid mixing cylinder. The driving gear drives the homogenizing assembly to stir the aqueous solution in the liquid mixing cylinder, while simultaneously driving the rotating assembly to rotate the liquid mixing cylinder synchronously, thus achieving a combined motion of stirring and cylinder rotation.
[0008] As a further description of the above technical solution: The transposition assembly includes a transposition frame fixed on a frame, and a movable turntable is rotatably mounted on the transposition frame; A drive motor is fixedly installed at the bottom of the transposition frame. The output end of the drive motor is coaxially fixedly connected to a drive gear plate. The drive gear plate is driven by a driven gear plate through a transmission belt. A rotating shaft is fixedly mounted at the center of the driven gear plate. The upper end of the rotating shaft passes through the transposition frame and is coaxially fixedly connected to the movable turntable.
[0009] As a further description of the above technical solution: The liquid volume sensing component includes a support frame fixed on a movable turntable, a weight sensor fixedly installed on the bottom of the inner wall of the support frame, a support base plate fixedly connected to the upper side of the weight sensor, and several movable ball bearings rotatably installed on the inner wall of the support frame. The liquid dispensing cylinder is located in the support frame.
[0010] As a further description of the above technical solution: A fixed frame is fixedly installed on the side wall of the frame. The lifting assembly includes a lifting frame fixed on the fixed frame. A drive unit is installed on the lifting frame. A fixing clip is fixed on the belt of the drive unit. A lifting slide rail is fixedly installed on the side wall of the lifting frame, and a lifting slider is slidably installed on the lifting slide rail. One side of the fixing clip is fixedly connected to the lifting slider.
[0011] As a further description of the above technical solution: The transmission mechanism also includes a transmission housing, inside which a fixed plate is fixedly installed, and a transmission unit is mounted on the fixed plate. The output end of the transmission unit is fixedly connected to the drive gear.
[0012] As a further description of the above technical solution: The transmission mechanism also includes a limiting component, which includes a limiting slide rail fixed to the bottom of the fixed plate, a limiting slider slidably mounted on the limiting slide rail, and one side of the limiting slider being fixedly connected to the transmission rack.
[0013] As a further description of the above technical solution: The rotating assembly also includes a gear ring fixed to the outer periphery of the sealing cover. Guide racks are meshed on both the left and right sides of the gear ring. A connecting block is fixed on the upper side of the guide rack, and the upper side of the connecting block is fixedly connected to the transmission rack.
[0014] As a further description of the above technical solution: The bottom of the transmission housing has an opening slot, and the connecting block is located in the opening slot.
[0015] As a further description of the above technical solution: The uniform assembly includes a uniform shaft rotatably mounted on a sealing cover. The upper end of the uniform shaft is connected to the bottom of a drive gear. A fixing ring is fixedly sleeved on the outer periphery of the uniform shaft. Three fixing rods are fixedly mounted at equal intervals on the outer side of the fixing ring. Movable rotating rods are rotatably mounted on the outer ends of the three fixing rods. A uniform plate is fixedly mounted on the outer side of the movable rotating rods, and the uniform plate is arranged in a V shape.
[0016] An online solution preparation method for polyacrylamide dry powder includes the following steps: S1: By injecting aqueous solution into the liquid preparation cylinder, the weight of the aqueous solution presses down on the support plate. The weight sensor collects the pressure signal and converts it into an electrical signal, which is then transmitted to the background program. S2: The background program calculates the dosage based on the preset ratio, automatically starts the dosing device, and quantitatively adds polyacrylamide dry powder into the mixing cylinder to complete the closed-loop precise ratio of water and agent. S3: The background program controls the drive motor to run and drives the movable turntable to rotate, moving the liquid dispensing cylinder to the position directly below the uniform component, thus switching the dosing station to the stirring station; S4: Start the lifting component, which moves the sealing cover and the homogenizing component downwards, so that the sealing cover seals the liquid mixing cylinder and the homogenizing component extends into the mixture simultaneously. S5: Start the transmission unit to drive the drive gear to rotate, the drive gear drives the uniform shaft to rotate, and then drives the V-shaped uniform plate to perform preliminary stirring of the mixture in the liquid mixing cylinder; S6: The background program controls the reciprocating operation of the transmission unit, drives the gear to drive the uniform plate to reciprocate and change direction, and cooperates with the water flow pressure to realize the adaptive deflection of the uniform plate to complete the reciprocating flexible stirring. S7: The reciprocating movement of the transmission rack drives the guide rack to mesh with the gear ring, which in turn drives the sealing cover to rotate synchronously with the liquid mixing cylinder, forming a compound stirring of the uniform component's rotation and the liquid mixing cylinder's revolution, until the agent is completely dissolved and a qualified agent solution is obtained.
[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This online solution preparation device for polyacrylamide dry powder uses a weight sensor to monitor the weight of the aqueous solution in real time and convert it into an electrical signal. The background program precisely controls the injection of polyacrylamide dry powder according to a preset ratio, achieving a closed-loop precise ratio of aqueous solution volume to dry powder dosage. This fundamentally avoids the problems of ratio error and dosage loss caused by manual operation, ensuring that the agent and aqueous solution are always in the optimal ratio. It avoids situations such as excessive agent waste, polymer chain degradation and clumping due to excessive concentration, and insufficient dissolution and substandard flocculation and thickening effects caused by insufficient agent. It significantly improves the accuracy of solution preparation and agent utilization rate, while realizing the automated control of the solution preparation process, reducing manual intervention and improving production efficiency.
[0018] 2. This online dispensing device for polyacrylamide dry powder can comprehensively stir the mixed solution in the dispensing cylinder through a movable rotating rod and a uniform plate. This effectively breaks up the fish-eye clumps formed when the dry powder comes into contact with water, eliminates the problems of excessively high local concentration and insufficient dissolution, accelerates the full expansion of the dry powder polymer chains, significantly improves the dissolution rate and mixing uniformity, ensures that the viscosity of the drug solution meets the standard and its performance is stable, and improves the quality of the dispensing. At the same time, by setting the uniform plate to a V shape, it can adaptively deflect under the action of water pressure to achieve flexible turbulent stirring with reciprocating direction. This avoids the rigid shearing that causes the polyacrylamide polymer chains to break down and degrade, ensuring that the effective components of the drug are not damaged. It can also form a three-dimensional turbulent flow field, eliminate the stirring dead zone, achieve full-area mixing without dead corners, further improve the dissolution uniformity, shorten the drug maturation time, and the adaptive reversing structure does not require additional drive components, simplifying the overall structure, reducing the failure rate, and adapting to the needs of long-term continuous online dispensing operations.
[0019] 3. The online dispensing device for this polyacrylamide dry powder agent achieves synchronous rotation of the sealing cap and the dispensing cylinder through the linkage of the transmission rack, guide rack and gear ring. This achieves a double-layer composite stirring mode of rotation of the uniform component and revolution of the dispensing cylinder, thereby enhancing the turbulence intensity of the liquid inside the cylinder. The rotation of the cylinder and the stirring of the internal uniform plate form a reverse differential flow field, completely eliminating the stirring dead zone on the cylinder wall and bottom, further solving the problems of dry powder clumping and fish-eye, allowing the polyacrylamide dry powder to dissolve more fully and the polymer chains to expand more completely, thus comprehensively improving the uniformity of dispensing and dissolution efficiency. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the overall three-dimensional structure provided according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the installation structure of the frame and dispensing mechanism according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the transposition component structure provided according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the installation structure of the movable turntable and liquid volume sensing component according to an embodiment of the present invention is shown; Figure 5 A partial structural schematic diagram of a liquid volume sensing component provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of a lifting assembly structure provided according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the transmission mechanism and uniform component installation structure provided according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the transmission housing and fixing plate mounting structure provided according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of a partial structure of a transmission mechanism provided according to an embodiment of the present invention is shown. Figure 1 ; Figure 10 A schematic diagram of a partial structure of a transmission mechanism provided according to an embodiment of the present invention is shown. Figure 2 ; Figure 11 A schematic diagram of the installation structure of the transmission unit and drive gear according to an embodiment of the present invention is shown; Figure 12 A schematic diagram of the sealing cover and uniform shaft mounting structure provided according to an embodiment of the present invention is shown; Figure 13 A schematic diagram of a partial structure of a uniform component provided according to an embodiment of the present invention is shown; Figure 14 A schematic diagram of the motion state of a uniform plate provided according to an embodiment of the present invention is shown.
[0022] Legend: 10. Base; 11. Frame; 12. Mounting bracket; 20. Dispensing mechanism; 21. Transfer assembly; 211. Transfer frame; 212. Movable turntable; 213. Drive motor; 214. Driving gear plate; 215. Driven gear plate; 216. Transmission belt; 217. Rotating shaft; 22. Liquid volume sensing assembly; 221. Support frame; 222. Dispensing cylinder; 223. Weight sensor; 224. Support base plate; 225. Movable ball bearing; 23. Injector; 30. Lifting assembly; 31. Lifting frame; 32. Drive unit; 33. Fixing clips; 34. Lifting slide rail; 35. Lifting slider; 40. Transmission mechanism; 41. Transmission housing; 411. Opening slot; 42. Fixing plate; 43. Transmission unit; 44. Drive gear; 45. Transmission rack; 46. Limiting assembly; 461. Limiting slide rail; 462. Limiting slider; 47. Rotating assembly; 471. Sealing cover; 472. Gear ring; 473. Guide rack; 474. Connecting block; 50. Uniform assembly; 51. Uniform shaft; 52. Fixing ring; 53. Fixing rod; 54. Movable rotating rod; 55. Uniform plate. Detailed Implementation
[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0024] Please see Figures 1 to 14 An online dispensing device for polyacrylamide dry powder includes a base 10 and a frame 11 mounted on the base 10. It also includes a dispensing mechanism 20 mounted on the frame 11, a lifting assembly 30, and a transmission mechanism 40 mounted on the frame 11. The dispensing mechanism 20 includes a shifting assembly 21 fixed to the frame 11, a liquid volume sensing assembly 22 for monitoring liquid volume, and an injector 23 for dispensing polyacrylamide dry powder. The liquid volume sensing assembly 22 includes a dispensing cylinder 222. The transmission mechanism 40 includes a drive gear 44. Both sides of the drive gear 44 are meshed with transmission racks 45. The bottom of the transmission racks 45 is fixedly connected to a rotating component 47. The bottom of the drive gear 44 is fixedly connected to a homogenizing component 50, and the lower end of the homogenizing component 50 passes through the rotating component 47. The rotating component 47 includes a sealing cover 471. During operation, the lifting component 30 drives the sealing cover 471 to move down and cover the liquid mixing cylinder 222. The drive gear 44 drives the homogenizing component 50 to stir the aqueous solution in the liquid mixing cylinder 222. At the same time, the drive gear 44 drives the rotating component 47 to drive the liquid mixing cylinder 222 to rotate synchronously, realizing the compound motion of stirring and cylinder rotation.
[0025] The weight of the aqueous solution is monitored in real time by the weight sensor 223 and converted into an electrical signal. The background program then precisely controls the injection device 23 to inject the polyacrylamide dry powder according to a preset ratio. This achieves a closed-loop precise ratio of aqueous solution volume to dry powder dosage, and fundamentally avoids the problems of ratio error and dosage loss caused by manual operation. It ensures that the agent and aqueous solution are always in the optimal ratio, avoiding situations such as excessive agent waste, high concentration leading to polymer chain degradation and clumping, and insufficient agent causing incomplete dissolution and substandard flocculation and thickening effects. This significantly improves the accuracy of solution preparation and agent utilization, while also realizing automated control of the solution preparation process, reducing manual intervention and improving production efficiency.
[0026] Please see Figures 1 to 3 The transposition assembly 21 includes a transposition frame 211 fixed to the frame 11, on which a movable turntable 212 is rotatably mounted; a drive motor 213 is fixedly mounted at the bottom of the transposition frame 211, and a drive gear 214 is coaxially fixedly connected to the output end of the drive motor 213. The drive gear 214 is driven by a driven gear 215 via a transmission belt 216. A rotating shaft 217 is fixedly mounted at the center of the driven gear 215, and the upper end of the rotating shaft 217 passes through the transposition frame 211 and connects with the movable turntable 212. The rotating disc 212 is coaxially fixedly connected; after the dosing is completed, the background program controls the drive motor 213 to start. The output end of the drive motor 213 drives the active gear disc 214 to rotate slowly. The active gear disc 214 transmits power to the driven gear disc 215 through the transmission belt 216. The driven gear disc 215 drives the rotating shaft 217 to rotate, thereby making the rotating disc 212 rotate synchronously. During the rotation of the rotating disc 212, the liquid dispensing cylinder 222 is moved to the position directly below the uniform component 50, realizing the change of work position.
[0027] Please see Figures 2 to 5 The liquid volume sensing component 22 includes a support frame 221 fixed on a movable turntable 212. A weight sensor 223 is fixedly installed on the bottom of the inner wall of the support frame 221. A support base plate 224 is fixedly connected to the upper side of the weight sensor 223. Several movable balls 225 are rotatably installed on the inner wall of the support frame 221. The liquid dispensing cylinder 222 is located in the support frame 221. By pouring an appropriate amount of aqueous solution into the liquid dispensing cylinder 222, its own weight generates downward pressure on the support base plate 224 as the aqueous solution is injected. The weight sensor 223 on the support base plate 224 monitors the pressure data in real time and converts it into an electrical signal, which is sent to the background program. After receiving the signal, the background program starts the injector 23 according to the preset ratio, so that the injector 23 injects the corresponding proportion of polyacrylamide dry powder into the aqueous solution. Through this setting, a closed-loop precise ratio of aqueous solution volume to dry powder dosage is achieved.
[0028] Please see Figure 1 , Figure 6 A fixed frame 12 is fixedly installed on the side wall of the frame 11. The lifting assembly 30 includes a lifting frame 31 fixed on the fixed frame 12. A drive unit 32 is installed on the lifting frame 31. A fixing clip 33 is fixed on the belt of the drive unit 32. A lifting slide rail 34 is fixedly installed on the side wall of the lifting frame 31. A lifting slider 35 is slidably installed on the lifting slide rail 34. One side of the fixing clip 33 is fixedly connected to the lifting slider 35. When the drive unit 32 is started, the belt on the drive unit 32 is driven to move, and the belt equipped with the fixing clip 33 moves downward. When the fixing clip 33 moves downward, it drives the lifting slider 35 to move downward synchronously on the lifting slide rail 34.
[0029] Please see Figures 7 to 8 , Figure 11 The transmission mechanism 40 also includes a transmission housing 41, inside which a fixed plate 42 is fixedly provided, and a transmission unit 43 is installed on the fixed plate 42. The output end of the transmission unit 43 is fixedly connected to the drive gear 44. By starting the transmission unit 43, the output end of the transmission unit 43 is driven to drive the drive gear 44 to rotate.
[0030] Please see Figures 9 to 11 The transmission mechanism 40 also includes a limiting component 46, which includes a limiting slide rail 461 fixed to the bottom of the fixed plate 42. A limiting slider 462 is slidably mounted on the limiting slide rail 461. One side of the limiting slider 462 is fixedly connected to the transmission rack 45. The driving gear 44 meshes with the transmission racks 45 on both sides, thereby driving the two sets of transmission racks 45 to move. During the movement of the transmission racks 45, the limiting slider 462 is driven to slide directionally along the limiting slide rail 461.
[0031] Please see Figures 9 to 12 The rotating assembly 47 also includes a gear ring 472 fixed to the outer periphery of the sealing cover 471. Guide racks 473 are meshed on both the left and right sides of the gear ring 472. A connecting block 474 is fixed on the upper side of the guide rack 473. The upper side of the connecting block 474 is fixedly connected to the transmission rack 45. During the reciprocating movement of the transmission rack 45, the connecting block 474 drives the guide rack 473 to move synchronously. While the guide rack 473 is moving, it meshes with the gear ring 472, thereby causing the gear ring 472 to drive the sealing cover 471 to rotate synchronously. At the same time as the sealing cover 471 rotates, the liquid dispensing cylinder 222 rotates synchronously.
[0032] Please see Figure 7 The bottom of the transmission housing 41 is provided with an opening groove 411, and the connecting block 474 is located in the opening groove 411; by providing an opening groove 411 at the bottom of the transmission housing 41, it is convenient for the connecting block 474 to move.
[0033] Please see Figures 7 to 14 The uniform assembly 50 includes a uniform shaft 51 rotatably mounted on a sealing cover 471. The upper end of the uniform shaft 51 is connected to the bottom of a drive gear 44. A fixing ring 52 is fixedly sleeved on the outer periphery of the uniform shaft 51. Three equally spaced fixing rods 53 are fixedly mounted on the outer side of the fixing ring 52. Movable rotating rods 54 are rotatably mounted on the outer ends of the three fixing rods 53. A uniform plate 55 is fixedly mounted on the outer side of the movable rotating rods 54, and the uniform plate 55 is arranged in a V shape. By arranging the uniform plate 55 in a V shape, it is vertically arranged in a static state. As the uniform plate 55 rotates and cuts into the aqueous solution, the reverse flow generated by the water contact... The pressure causes the uniform plate 55 to drive the movable rotating rod 54 to adaptively deflect around the fixed rod 53, switching to a transverse V-shaped arrangement. The V-shaped front end of the uniform plate 55 performs flexible shearing on the aqueous solution, causing the aqueous solution in the contact area to flow to both sides along the V-shaped edge of the uniform plate 55. At the same time, it promotes the upper and lower layers of aqueous solution to collide and mix turbulently. This setting avoids the degradation of polyacrylamide polymer chains caused by rigid shearing, ensuring that the effective components of the agent are not damaged. It also forms a three-dimensional turbulent flow field, eliminates dead zones in the stirring, and achieves mixing without dead angles throughout the entire area, further improving the uniformity of dissolution and shortening the maturation time of the agent.
[0034] An online solution preparation method for polyacrylamide dry powder includes the following steps: S1: By injecting aqueous solution into the liquid preparation cylinder 222, the weight of the aqueous solution presses down on the bearing base plate 224. The weight sensor 223 collects the pressure signal and converts it into an electrical signal, which is then transmitted to the background program. S2: The background program calculates the dosage based on the preset ratio, automatically starts the dosing device 23, and quantitatively adds polyacrylamide dry powder into the liquid mixing cylinder 222 to complete the closed-loop precise ratio of water and medicine. S3: The background program controls the drive motor 213 to run and drives the movable turntable 212 to rotate, changing the liquid dispensing cylinder 222 to be directly below the uniform component 50, realizing the switching from the dosing station to the stirring station; S4: Start the lifting component 30, which will drive the sealing cover 471 and the homogenizing component 50 to move down, so that the sealing cover 471 seals the liquid mixing cylinder 222, and the homogenizing component 50 simultaneously extends into the mixture. S5: Start the transmission unit 43 to drive the drive gear 44 to rotate, the drive gear 44 drives the uniform shaft 51 to rotate, and then drives the V-shaped uniform plate 55 to perform preliminary stirring of the mixture in the liquid mixing cylinder 222. S6: The background program controls the reciprocating operation of the transmission unit 43, drives the gear 44 to drive the uniform plate 55 to reciprocate and change direction, and cooperates with the water flow pressure to realize the adaptive deflection of the uniform plate 55 to complete the reciprocating flexible stirring. S7: The reciprocating movement of the transmission rack 45 drives the guide rack 473 to mesh with the gear ring 472, which in turn drives the sealing cover 471 to rotate synchronously with the liquid mixing cylinder 222, forming a compound stirring of the rotation of the uniform component 50 and the revolution of the liquid mixing cylinder 222 until the agent is completely dissolved and a qualified agent solution is obtained.
[0035] Working principle: First, the solution preparation operation is performed. An appropriate amount of aqueous solution is poured into the solution preparation cylinder 222. As the aqueous solution is injected, its own weight exerts downward pressure on the support plate 224. The weight sensor 223 on the support plate 224 monitors this pressure data in real time and converts it into an electrical signal, which is sent to the background program. After receiving the signal, the background program starts the injector 23 according to the preset ratio, so that the injector 23 injects the corresponding proportion of polyacrylamide dry powder into the aqueous solution. Through this setting, a closed-loop precise ratio of aqueous solution volume to dry powder dosage is achieved, which avoids the ratio error and dosage loss problems that may be caused by manual operation. Relying on the real-time monitoring of the weight sensor 223 and the intelligent control of the background program, it can ensure that the agent and aqueous solution are always in the optimal ratio state, effectively preventing waste caused by excessive agent, polymer chain degradation and agglomeration caused by excessive concentration, and insufficient dissolution and substandard flocculation and thickening effect caused by insufficient agent. It greatly improves the accuracy of solution preparation and agent utilization, and achieves automated control of the solution preparation process. After the drug is administered, the background program controls the start of the drive motor 213. The output of the drive motor 213 drives the active gear disk 214 to rotate slowly. The active gear disk 214 transmits power to the driven gear disk 215 through the transmission belt 216. The driven gear disk 215 drives the rotating shaft 217 to rotate, which in turn causes the movable turntable 212 to rotate synchronously. During the rotation of the movable turntable 212, the liquid dispensing cylinder 222 is moved to the position directly below the uniform component 50, realizing the change of work station. This setting, with the help of closed-loop program control, realizes the seamless connection between the end of drug administration and the change of work station. No manual intervention is required throughout the process, which further improves the full-process automated chain of liquid dispensing. After the workstation conversion is completed, the drive unit 32 is started again, which drives the belt on the drive unit 32 to move and drives the belt equipped with the fixing clip 33 to move downward. When the fixing clip 33 moves downward, it drives the lifting slider 35 to move downward synchronously on the lifting slide rail 34. During the downward movement of the lifting slider 35, it also drives the sealing cover 471 to move down to the port position of the liquid mixing cylinder 222. As the sealing cover 471 continues to press down and fit, it achieves a tight seal with the liquid mixing cylinder 222. At the same time, the uniform component 50 is inserted into the aqueous solution inside the liquid mixing cylinder 222 to complete the sealing and alignment preparation before stirring. Next, the transmission unit 43 is started, which drives the output end of the transmission unit 43 to drive the drive gear 44 to rotate. As the drive gear 44 rotates, it meshes with the transmission racks 45 on both sides, thereby driving the two sets of transmission racks 45 to move. During the movement of the transmission racks 45, the limiting slider 462 moves along the limiting slide rail 461 in a directional manner. Through the closed-loop control of the background program, the transmission unit 43 drives the drive gear 44 to perform reciprocating rotation, so that the transmission racks 45 on both sides present a stable reciprocating movement state. Furthermore, during the rotation of the drive gear 44, the uniform shaft 51 is simultaneously driven to rotate synchronously, which in turn drives the movable rotating rod 54 and the uniform plate 55 to rotate in the liquid mixing cylinder 222. Thus, the movable rotating rod and the uniform plate 55 are used to stir the aqueous solution containing polyacrylamide dry powder in the liquid mixing cylinder 222. The movable rotating rod 54 and the uniform plate 55 can be used to perform all-round stirring of the polyacrylamide dry powder mixed aqueous solution in the liquid mixing cylinder 222, which can effectively break up the fish-eye clumps formed when the dry powder comes into contact with water, prevent the problem of excessively high local concentration and insufficient dissolution, accelerate the full expansion of the dry powder polymer chains, greatly improve the dissolution rate and mixing uniformity, and ensure that the viscosity of the drug aqueous solution meets the standard and the performance is stable. By setting the uniform plate 55 in a V-shape, which is vertically arranged in its static state, as the uniform plate 55 rotates and cuts into the aqueous solution, the reverse pressure generated by the water flow contact drives the uniform plate 55 to drive the movable rotating rod 54 to adaptively deflect around the fixed rod 53, switching to a horizontal V-shaped arrangement. The V-shaped front end of the uniform plate 55 performs flexible shearing on the aqueous solution, causing the aqueous solution in the contact area to be diverted and guided to both sides along the V-shaped edge of the uniform plate 55. At the same time, it promotes the mutual collision and turbulent mixing of the upper and lower layers of aqueous solution. This arrangement avoids the degradation of polyacrylamide polymer chains caused by rigid shearing, ensuring that the effective components of the agent are not damaged, and also forms a three-dimensional turbulent flow field, eliminating dead zones in the stirring, achieving full-area mixing without dead corners, and further improving the solubility. To improve uniformity and shorten the maturation time of the agent, the transmission unit 43 drives the drive gear 44 to rotate in the opposite direction as the program is controlled. The drive gear 44 synchronously drives the uniform shaft 51 to rotate in the opposite direction. The movable rotating rod 54 then drives the uniform plate 55 to change direction and stir. When the uniform plate 55 rotates in the opposite direction and comes into contact with the aqueous solution, it is again subjected to the water pressure and deflects adaptively, and the shear and guide directions are switched synchronously. This setting realizes flexible turbulent stirring with reciprocating direction, avoiding the laminar flow phenomenon formed by stirring in one direction, further enhancing the convection mixing effect of the upper and lower liquid layers, and making the dry powder agent and aqueous solution more thoroughly integrated. At the same time, the adaptive reversing structure does not require additional drive components, simplifying the overall structure, reducing the failure rate, and adapting to the long-term continuous online liquid preparation operation requirements. Furthermore, during the reciprocating movement of the transmission rack 45, the connecting block 474 simultaneously drives the guide rack 473 to move synchronously. Simultaneously, the guide rack 473 meshes with the gear ring 472, causing the gear ring 472 to drive the sealing cover 471 to rotate synchronously. The rotation of the sealing cover 471, in turn, drives the liquid dispensing cylinder 222 to rotate synchronously. The presence of movable balls 225 on the inner wall of the support frame 221 facilitates the rotation of the liquid dispensing cylinder 222. The arrangement of the movable balls 225 significantly reduces the rotational friction resistance of the liquid dispensing cylinder 222, reducing rotational losses, preventing cylinder jamming and shaking, ensuring smooth and stable rotation, and preventing liquid splashing. Furthermore, the gear ring... 472 drives the sealing cap 471 and the liquid distribution cylinder 222 to rotate synchronously. Through this setting, the guide rack 473 and gear ring 472 are linked by the reciprocating movement of the transmission rack 45. Without the need for an additional independent drive source, the synchronous rotation of the sealing cap 471 and the liquid distribution cylinder 222 can be achieved, realizing a double-layer composite stirring mode of rotation of the uniform component 50 and revolution of the liquid distribution cylinder 222. This greatly enhances the intensity of liquid turbulence inside the cylinder. At the same time, the rotation of the liquid distribution cylinder 222 and the stirring of the internal uniform plate 55 form a reverse differential flow field, completely eliminating the stirring dead zone on the cylinder wall and bottom. This further solves the problems of dry powder clumping and fish-eye, allowing the polyacrylamide dry powder to dissolve more fully and the polymer chains to expand more completely, thus comprehensively improving the uniformity of liquid distribution and dissolution efficiency.
[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. An online dispensing device for polyacrylamide dry powder, comprising a base (10) and a frame (11) disposed on the base (10), characterized in that: It also includes a dispensing mechanism (20) mounted on the frame (11), and a lifting assembly (30) and a transmission mechanism (40) mounted on the frame (11). The dispensing mechanism (20) includes a shifting component (21) fixed on the frame (11), the shifting component (21) is provided with a liquid volume sensing component (22) for monitoring the liquid volume, and a dispensing device (23) for dispensing polyacrylamide dry powder. The liquid volume sensing component (22) includes a dispensing cylinder (222). The transmission mechanism (40) includes a drive gear (44), and a transmission rack (45) meshes with both the left and right sides of the drive gear (44). A rotating component (47) is fixedly connected to the bottom of the transmission rack (45), and a uniform component (50) is fixedly connected to the bottom of the drive gear (44), with the lower end of the uniform component (50) passing through the rotating component (47). The rotating component (47) includes a sealing cover (471). During operation, the lifting component (30) drives the sealing cover (471) to move down and cover the liquid mixing cylinder (222). The driving gear (44) drives the homogenizing component (50) to stir the aqueous solution in the liquid mixing cylinder (222). At the same time, the rotating component (47) drives the liquid mixing cylinder (222) to rotate synchronously, realizing the compound motion of stirring and cylinder rotation.
2. The online dispensing device for polyacrylamide dry powder according to claim 1, characterized in that: The transposition assembly (21) includes a transposition frame (211) fixed on the frame (11), and a movable turntable (212) is rotatably mounted on the transposition frame (211). A drive motor (213) is fixedly installed at the bottom of the transposition frame (211). The output end of the drive motor (213) is coaxially fixedly connected to an active gear plate (214). The active gear plate (214) is driven by a driven gear plate (215) through a transmission belt (216). A rotating shaft (217) is fixedly mounted at the center of the driven gear plate (215). The upper end of the rotating shaft (217) passes through the transposition frame (211) and is coaxially fixedly connected to the movable turntable (212).
3. The online dispensing device for polyacrylamide dry powder according to claim 2, characterized in that: The liquid volume sensing component (22) includes a support frame (221) fixed on a movable turntable (212), a weight sensor (223) is fixedly installed on the bottom of the inner wall of the support frame (221), a support base plate (224) is fixedly connected to the upper side of the weight sensor (223), and a plurality of movable balls (225) are rotatably installed on the inner wall of the support frame (221). The liquid dispensing cylinder (222) is located in the support frame (221).
4. The online dispensing device for polyacrylamide dry powder according to claim 1, characterized in that: A fixed frame (12) is fixedly installed on the side wall of the frame (11). The lifting assembly (30) includes a lifting frame (31) fixed on the fixed frame (12). A drive unit (32) is installed on the lifting frame (31). A fixing clip (33) is fixed on the belt of the drive unit (32). A lifting slide rail (34) is fixedly installed on the side wall of the lifting frame (31), and a lifting slider (35) is slidably installed on the lifting slide rail (34). One side of the fixing clip (33) is fixedly connected to the lifting slider (35).
5. The online dispensing device for polyacrylamide dry powder according to claim 1, characterized in that: The transmission mechanism (40) also includes a transmission housing (41), a fixed plate (42) is fixedly provided inside the transmission housing (41), a transmission unit (43) is installed on the fixed plate (42), and the output end of the transmission unit (43) is fixedly connected to the drive gear (44).
6. The online dispensing device for polyacrylamide dry powder according to claim 5, characterized in that: The transmission mechanism (40) further includes a limiting component (46), which includes a limiting slide rail (461) fixed to the bottom of the fixing plate (42), a limiting slider (462) slidably mounted on the limiting slide rail (461), and one side of the limiting slider (462) is fixedly connected to the transmission rack (45).
7. The online dispensing device for polyacrylamide dry powder according to claim 5, characterized in that: The rotating assembly (47) also includes a gear ring (472) fixed to the outer periphery of the sealing cover (471). Guide racks (473) are meshed on both the left and right sides of the gear ring (472). A connecting block (474) is fixed on the upper side of the guide rack (473). The upper side of the connecting block (474) is fixedly connected to the transmission rack (45).
8. The online dispensing device for polyacrylamide dry powder according to claim 7, characterized in that: The bottom of the transmission housing (41) is provided with an opening groove (411), and the connecting block (474) is located in the opening groove (411).
9. The online dispensing device for polyacrylamide dry powder according to claim 1, characterized in that: The uniform assembly (50) includes a uniform shaft (51) rotatably mounted on a sealing cover (471). The upper end of the uniform shaft (51) is connected to the bottom of a drive gear (44). A fixing ring (52) is fixedly sleeved on the outer periphery of the uniform shaft (51). Three fixing rods (53) are fixedly mounted on the outer side of the fixing ring (52). Movable rotating rods (54) are rotatably mounted on the outer ends of the three fixing rods (53). A uniform plate (55) is fixedly mounted on the outer side of the movable rotating rod (54), and the uniform plate (55) is arranged in a V shape.
10. An online preparation method for polyacrylamide dry powder, applied to the online preparation device for polyacrylamide dry powder as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: By injecting aqueous solution into the liquid preparation cylinder (222), the weight of the aqueous solution presses down on the bearing base plate (224), and the weight sensor (223) collects the pressure signal and converts it into an electrical signal to be transmitted to the background program; S2: The background program calculates the drug dosage according to the preset ratio, automatically starts the injector (23), and quantitatively adds polyacrylamide dry powder into the liquid mixing cylinder (222) to complete the closed-loop precise ratio of water and drug. S3: The background program controls the drive motor (213) to run and drives the movable turntable (212) to rotate, so as to move the liquid dispensing cylinder (222) to the position directly below the uniform component (50) and realize the switching from the dosing station to the stirring station; S4: Start the lifting assembly (30), which will cause the sealing cover (471) and the homogenizing assembly (50) to move down, so that the sealing cover (471) seals the liquid mixing cylinder (222), and the homogenizing assembly (50) extends into the mixture simultaneously; S5: Start the transmission unit (43) to drive the drive gear (44) to rotate, the drive gear (44) drives the uniform shaft (51) to rotate, and then drives the V-shaped uniform plate (55) to perform preliminary stirring of the mixture in the liquid mixing cylinder (222); S6: The background program controls the transmission unit (43) to reciprocate, and the drive gear (44) drives the uniform plate (55) to reciprocate and change direction. With the help of water flow pressure, the uniform plate (55) can be adaptively deflected to complete the reciprocating flexible stirring. S7: The reciprocating movement of the transmission rack (45) drives the guide rack (473) to mesh with the gear ring (472), which in turn drives the sealing cover (471) to rotate synchronously with the liquid mixing cylinder (222), forming a composite stirring of the rotation of the uniform component (50) and the revolution of the liquid mixing cylinder (222) until the agent is completely dissolved and a qualified agent solution is obtained.