Online mixing and stirring equipment
By designing the cylinder and using an intelligent control module, the online mixing equipment solves problems such as high failure rate, poor mixing effect, and large footprint, achieving efficient, stable, and low-cost mixing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-03-27
AI Technical Summary
Existing mixing equipment suffers from problems such as high failure rate, poor mixing effect, large footprint, and complex design, and its performance is particularly poor in large-volume tanks.
It features a retractable dosing port cylinder design, an impeller structure with independent inner and outer shaft drives, and an intelligent control module to achieve efficient mixing. The stirring effect is optimized through flow and concentration sensors.
It achieves efficient mixing, reduced energy consumption, reduced maintenance costs, simple structure, convenient installation, strong adaptability, stable operation, and low failure rate.
Smart Images
Figure CN121732015A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a mixing device for municipal or industrial water treatment, and more particularly to an online mixing and stirring device. Background Technology
[0002] Existing mixing methods mainly include mechanical stirring and hydraulic mixing:
[0003] 1. Mechanical stirring (vertical / horizontal agitator): A motor-driven stirring paddle (such as a blade, turbine, propeller, etc.) rotates in a mixing tank or reaction tank, forcing fluid mixing. Applications include water plant mixing wells, wastewater treatment coagulation tanks, and chemical reaction vessels. Main disadvantages:
[0004] (1) Frequent mechanical failures: bearings and seals are prone to wear and tear, requiring frequent maintenance.
[0005] (2) Uneven mixing: It is easy to form dead zones, especially in large-volume pools where the effect is poor.
[0006] (3) Large footprint: requires a mixing tank or reaction tank, resulting in high civil engineering costs.
[0007] 2. Hydraulic mixing (pipeline mixers, static mixers): Utilizing the fluid's own kinetic energy, turbulent mixing is generated through fixed flow-turbing elements (such as spiral vanes, baffles, orifice plates) within the pipeline. Applications include chemical dosing mixing in water treatment plants and chemical pipeline reactions. Main disadvantages:
[0008] (1) Dependence on flow rate: The mixing effect is poor at low flow rates, and a higher flow rate (usually >1m / s) needs to be maintained.
[0009] (2) Easy to clog: Fluid containing suspended matter may clog the turbulence elements, making cleaning difficult.
[0010] (3) Poor adaptability: The fixed structure is difficult to adjust and cannot adapt to changes in flow rate or water quality. Summary of the Invention
[0011] This invention provides an online mixing and stirring device that solves the problems of high failure rate, poor mixing effect, large footprint, and complex design of traditional mixing wells and vertical mixers. The technical solution is as follows:
[0012] An online mixing and stirring device includes a cylinder with a retractable dosing port and a drive box installed on the upper part of the cylinder. The left and right sides of the cylinder are fixedly connected to equal-diameter pipes through connectors. The drive box is equipped with two independent drive motors for driving inner and outer shafts. One end of the inner and outer shafts is located inside the drive box, and the other end extends into the cylinder to the fixed end at the bottom. The inner and outer shafts are equipped with a lower stirring impeller and an upper stirring impeller.
[0013] The upper surface of the cylinder is provided with a retractable dosing port, which includes an outer tube and an inner tube. The outer tube is installed on the upper surface of the cylinder, and the inner tube is located inside the outer tube and can move up and down along the outer tube. The inner tube is connected to the dosing pipeline, and the dosing pipeline is equipped with a dosing pump.
[0014] The drive motors installed inside the drive box are a first motor and a second motor. The two drive motors drive the outer shaft and inner shaft of the inner and outer shafts respectively at different speeds. The inner and outer shafts are divided into an inner shaft and an outer shaft with their center lines on the same axis. The inner shaft is nested in the outer shaft. The inner shaft is fixedly connected to the lower stirring impeller, and the outer shaft is fixedly connected to the upper stirring impeller.
[0015] The bottom of the inner shaft is inserted into the fixed end, which limits its movement. The fixed end is a first bearing, and the outer ring of the first bearing is fixedly connected to the bottom of the cylinder. The bottom of the inner shaft is inserted into the inner ring of the first bearing.
[0016] The cylinder is equipped with two limiting connecting rods, namely a first connecting rod and a second connecting rod. The first connecting rod is located on the left side of the cylinder and extends from top to bottom to the middle of the cylinder. The second connecting rod is located on the right side of the cylinder and extends from bottom to top to the middle of the cylinder. The two limiting connecting rods can limit the guide installed on the inner and outer shafts.
[0017] The guide is linear, with an opening in the middle for inserting the inner shaft, and the first connecting rod and the second connecting rod are respectively secured by buckles at both ends. The guide is located between the lower stirring impeller and the upper stirring impeller.
[0018] The online mixing and stirring equipment is also equipped with an intelligent control module, which is connected to the dosing pump installed in the dosing pipeline to control the dosing flow rate of the dosing pipeline to the retractable dosing port.
[0019] A flow sensor is installed in the pipe at the front end of the cylinder, and a concentration sensor is installed in the pipe at the rear end. Both the flow sensor and the concentration sensor are connected to the intelligent control module.
[0020] The intelligent control module is connected to two drive motors inside the drive box.
[0021] The cylindrical body is similar to a valve body, and its left and right sides are connected to pipes of equal diameter through connectors, which are flanges or clamps; the bottom of the cylindrical body is provided with a mounting base for support installation.
[0022] The online mixing and stirring equipment described above features a simple structure, convenient installation, and high mixing efficiency. This equipment can be installed independently in a pipeline, achieving efficient mixing through optimized flow channel design while reducing energy consumption and maintenance costs. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the online mixing and stirring equipment;
[0024] Figure 2 This is a top view schematic diagram of the online mixing and stirring equipment;
[0025] Figure 3 This is a flowchart illustrating the operation of the online mixing and stirring equipment.
[0026] Figure 4 This is a schematic diagram illustrating the application of the online mixing and stirring equipment. Detailed Implementation
[0027] like Figure 1 and Figure 2 As shown, the online mixing and stirring equipment includes a cylinder 1 with a retractable dosing port 11 and a drive box 2 installed on the upper part of the cylinder 1. The left and right sides of the cylinder 1 are fixedly connected to equal-diameter pipes through connectors 8. The drive box 2 is equipped with two independent drive motors for driving the inner and outer shafts 4. One end of the inner and outer shafts 4 is located inside the drive box 2, and the other end extends into the cylinder 1 to the fixed end 10 at the bottom. The inner and outer shafts 4 are equipped with a lower stirring impeller 5 and an upper stirring impeller 6.
[0028] The cylinder 1 is similar to a valve body, and its left and right sides are connected to pipes of equal diameter through connectors 8. The connectors 8 can be flanges or clamps. The bottom of the cylinder 1 is provided with a mounting base 9 for support and installation.
[0029] The upper surface of the cylinder 1 is provided with a retractable dosing port 11. The retractable dosing port 11 includes an outer tube and an inner tube. The outer tube is installed on the upper surface of the cylinder 1, and the inner tube is located inside the outer tube and can move up and down along the outer tube to realize the retractable state of the retractable dosing port 11.
[0030] The cylinder 1 is equipped with two limiting connecting rods, namely a first connecting rod 14 and a second connecting rod 15. The first connecting rod 14 is located on the left side of the cylinder 1 and extends from top to bottom to the middle of the cylinder 1. The second connecting rod 15 is located on the right side of the cylinder 1 and extends from bottom to top to the middle of the cylinder 1. The guide 7 installed on the inner and outer shafts 4 can be limited by the two limiting connecting rods.
[0031] The drive box 2 is bolted to the upper part of the cylinder 1. Inside the drive box 2 are two drive motors: a first motor 3 and a second motor 13. These two motors drive the outer and inner shafts of the inner and outer shafts 4 at varying speeds. The inner and outer shafts 4 are connected to the lower impeller 5 and the upper impeller 6, respectively, enabling independent drive of the two impellers. The inner shaft is fixedly connected to the lower impeller 5, and the outer shaft is fixedly connected to the upper impeller 6. The first motor 3 drives the outer shaft of the inner and outer shafts 4 to rotate via gears, and the outer shaft drives the upper impeller 6 to rotate. The second motor 13 drives the inner shaft of the inner and outer shafts 4 to rotate via gears, and the inner shaft drives the lower impeller 5 to rotate.
[0032] The inner and outer shafts 4 are divided into an inner shaft and an outer shaft. The inner shaft is nested in the outer shaft so that their center lines are on the same axis, thereby achieving the purpose of setting two rotational degrees of freedom on the same axis, so that the power of the first motor 3 and the second motor 13 can be transmitted to the outer shaft and the inner shaft respectively.
[0033] Furthermore, the bottom of the inner shaft is inserted into the fixed end 10 for positioning. The fixed end 10 can be a first bearing, with its outer ring fixedly connected to the bottom of the cylinder 1. The bottom of the inner shaft is inserted into the inner ring of the first bearing, which then positions the bottom of the inner shaft. A guide 7 can be installed in the middle of the inner shaft. The guide 7 is linear and has an opening in its middle for inserting the inner shaft. Buckles are provided at both ends of the guide 7 to engage the limiting connecting rods. These buckles engage the first connecting rod 14 and the second connecting rod 15, respectively, thus positioning the middle of the inner shaft. The guide 7 is located between the lower impeller 5 and the upper impeller 6.
[0034] The online mixing and stirring equipment is also equipped with an intelligent control module 12. The intelligent control module 12 is equipped with a control chip. The control chip is an STM32F103C8T6 microcontroller. The STM32F103C8T6 chip is a 32-bit microcontroller based on the Cortex-M3 core from STMicroelectronics. Its core parameters include a 72MHz main frequency, 64KB Flash, 20KB SRAM, and support for 37 GPIOs and multiple communication interfaces.
[0035] The retractable dosing port 11 is connected to the dosing pipeline and can be extended or retracted as needed. The dosing pipeline is equipped with a dosing pump, which is connected to the intelligent control module 12. The intelligent control module 12 controls the flow rate of the added agent. A flow sensor is installed at the front end of the pipeline of the cylinder 1 to detect the flow rate of the incoming liquid; a concentration sensor is installed at the rear end of the pipeline to detect the mixing effect of the equipment. Both the flow sensor and the concentration sensor are connected to the intelligent control module 12, which is also connected to the drive motor. By collecting flow rate and mixing effect information, the intelligent control module controls the dosing amount, mixing speed, and mixing direction.
[0036] like Figure 3 In the embodiment shown, during operation, the intelligent control module 12 detects flow rate and controls the flow rate for chemical dosing. The dosing pipeline forces the chemical into the cylinder 1 under pressure. The added chemical flows with the water, passing sequentially through the lower impeller 5 and the upper impeller 6. Different rotational speeds are set for the two impellers according to requirements for mixing. Then, the mixing effect is detected to determine whether the effect is satisfactory. AI analysis and decision-making can be used to adjust the rotational speed and direction of the lower impeller 5 and the upper impeller 6, achieving feedback.
[0037] When a malfunction requires repair, the drive box 2, along with the two drive motors 3, can be directly moved and removed from the cylinder 1 as a whole. The inner and outer shafts 4, the lower impeller 5, the upper impeller 6, and the guide 7 can be directly removed from the inside, replaced, and then put back in. The repair time is short. Moreover, the inner and outer shafts 4 are driven by a straight shaft, with fixed ends and the middle of the shaft, ensuring smooth overall operation.
[0038] like Figure 4 In the embodiment shown, in the first phase of a water plant in Beijing with a capacity of 500,000 m³ 3 / d, the mixing wells are not set up in series; two vertical mixers are installed in series, resulting in poor mixing and frequent equipment malfunctions. Modifying to other mixing methods is difficult due to limited space and the inability to shut down water for extended periods.
[0039] The above measures can solve the current problems of the water plant, improve its production efficiency, and ensure the efficient operation of its system.
[0040] The present invention has the following advantages:
[0041] (1) Simple installation method, similar to valve installation; (2) Small footprint, small overall size, two-stage stirring; (3) Dual drive independent operation, the stirring speed and direction of the two stages do not affect each other; (4) Stable operation, compared with vertical stirrers, the stirring shaft is fixed at both ends, and a guide is set in the middle, making the overall operation very stable. (5) High efficiency, compared with existing vertical stirrers, the internal process is better and the stirring efficiency is higher. Compared with some existing in-pipe stirrers, the stirring shaft is directly driven by the motor, without the need for turning and conversion, resulting in better mechanical efficiency and lower failure rate. (6) Convenient maintenance, no need for overall disassembly, just remove the drive head and replace the impeller directly. (7) Intelligent and efficient, with an independent control system and detection system, combined with an intelligent control module, to achieve intelligent and efficient operation.
Claims
1. An online mixing and stirring device, characterized in that: The device includes a cylinder with a retractable dosing port and a drive box installed on the upper part of the cylinder. The left and right sides of the cylinder are fixedly connected to equal-diameter pipes through connectors. The drive box contains two independent drive motors for driving the inner and outer shafts. One end of the inner and outer shafts is located inside the drive box, and the other end extends into the cylinder to the fixed end at the bottom. The inner and outer shafts are equipped with a lower stirring impeller and an upper stirring impeller.
2. The online mixing and stirring equipment according to claim 1, characterized in that: The upper surface of the cylinder is provided with a retractable dosing port, which includes an outer tube and an inner tube. The outer tube is installed on the upper surface of the cylinder, and the inner tube is located inside the outer tube and can move up and down along the outer tube. The inner tube is connected to the dosing pipeline, and the dosing pipeline is equipped with a dosing pump.
3. The online mixing and stirring equipment according to claim 1, characterized in that: The drive motors installed inside the drive box are a first motor and a second motor. The two drive motors drive the outer shaft and inner shaft of the inner and outer shafts respectively at different speeds. The inner and outer shafts are divided into an inner shaft and an outer shaft with their center lines on the same axis. The inner shaft is nested in the outer shaft. The inner shaft is fixedly connected to the lower stirring impeller, and the outer shaft is fixedly connected to the upper stirring impeller.
4. The online mixing and stirring equipment according to claim 1, characterized in that: The bottom of the inner shaft is inserted into the fixed end, which limits its movement. The fixed end is a first bearing, and the outer ring of the first bearing is fixedly connected to the bottom of the cylinder. The bottom of the inner shaft is inserted into the inner ring of the first bearing.
5. The online mixing and stirring equipment according to claim 1, characterized in that: The cylinder is equipped with two limiting connecting rods, namely a first connecting rod and a second connecting rod. The first connecting rod is located on the left side of the cylinder and extends from top to bottom to the middle of the cylinder. The second connecting rod is located on the right side of the cylinder and extends from bottom to top to the middle of the cylinder. The two limiting connecting rods can limit the guide installed on the inner and outer shafts.
6. The online mixing and stirring equipment according to claim 1, characterized in that: The guide is linear, with an opening in the middle for inserting the inner shaft, and the first connecting rod and the second connecting rod are respectively secured by buckles at both ends. The guide is located between the lower stirring impeller and the upper stirring impeller.
7. The online mixing and stirring equipment according to claim 1, characterized in that: The online mixing and stirring equipment is also equipped with an intelligent control module, which is connected to the dosing pump installed in the dosing pipeline to control the dosing flow rate of the dosing pipeline to the retractable dosing port.
8. The online mixing and stirring device according to claim 7, characterized in that: A flow sensor is installed in the pipe at the front end of the cylinder, and a concentration sensor is installed in the pipe at the rear end. Both the flow sensor and the concentration sensor are connected to the intelligent control module.
9. The online mixing and stirring device according to claim 7, characterized in that: The intelligent control module is connected to two drive motors inside the drive box.
10. The online mixing and stirring equipment according to claim 1, characterized in that: The cylindrical body is similar to a valve body, and its left and right sides are connected to pipes of equal diameter through connectors, which are flanges or clamps; the bottom of the cylindrical body is provided with a mounting base for support installation.