Alkaline lignin quantitative stirring device

Abstract

This utility model discloses a quantitative stirring device for alkali lignin, including a stirrer body. A feeding rack is mounted on the top of the stirrer body, and a feeding port is opened at the top of the feeding rack. A fixing frame is installed at the feeding port, and an alkali lignin quantitative tank is installed inside the fixing frame. A discharge pipe is mounted on the bottom of the alkali lignin quantitative tank, and an adjusting cylinder is mounted on the end of the discharge pipe. A discharge nozzle is mounted on the output end of the adjusting cylinder, and an adjusting mechanism is installed inside the adjusting cylinder. This device, by setting an alkali lignin quantitative tank on the top of the feeding rack and assembling a discharge pipe and adjusting cylinder with an adjusting mechanism at its bottom, can achieve precise quantitative discharge of alkali lignin.

Description

Technical Field

[0001] This utility model relates to the field of stirring device technology, specifically to a quantitative stirring device for alkali lignin. Background Technology

[0002] In modern industrial production, alkali lignin is an important raw material widely used in various fields. For example, in the preparation of rubber fillers, alkali lignin is often used as a binder, and the uniformity of its mixing with other raw materials directly affects the quality and performance of rubber products. However, currently common mixing devices have many problems. On the one hand, in the feeding stage, traditional devices struggle to achieve precise quantitative dispensing of alkali lignin. For instance, in some quantitative feeding devices for lignin fiber processing, the simple structural design cannot meet the high-precision quantitative requirements of alkali lignin, resulting in large errors in material dispensing. This not only affects the stability of product quality but may also lead to waste of raw materials. On the other hand, during the mixing process, existing lignin fiber mixing equipment and blending devices, due to unreasonable mixing structure and parameter design, make it difficult to achieve a uniform state when alkali lignin is mixed with other materials. For example, in traditional lignin fiber mixing equipment, when the mixing shaft is not in the center of the mixing tank, some areas may not be properly mixed. Furthermore, existing lignin fiber blending devices have simple structures and cannot fully mix the lignin fiber raw materials. Furthermore, for materials like alkali lignin, which are prone to special physical state changes under certain conditions (such as the tendency of calcium lignin sulfonate to clump and precipitate at low temperatures in winter), ordinary stirring devices lack effective countermeasures, thus affecting the smooth progress of the entire production process and product quality. Utility Model Content

[0003] The purpose of this invention is to provide a quantitative stirring device for alkali lignin to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an alkali lignin quantitative stirring device, comprising a stirrer body, a feeding rack mounted on the top of the stirrer body, a feeding port opened at the top of the feeding rack, a fixing frame installed at the feeding port, and an alkali lignin quantitative tank installed inside the fixing frame, a discharge pipe mounted on the bottom of the alkali lignin quantitative tank, an adjusting cylinder mounted on the end of the discharge pipe, a discharge nozzle mounted on the output end of the adjusting cylinder, and an adjusting mechanism mounted inside the adjusting cylinder, the adjusting mechanism including... The system comprises an adjusting shaft, a bushing, and adjusting fan blades. One inner wall of the adjusting cylinder is fitted with a bearing, and the other side wall of the adjusting cylinder has a rotating hole. A sealing shaft is fitted inside the rotating hole. One end of the adjusting shaft is installed inside the bearing, and the other end of the adjusting shaft is installed inside the sealing shaft. The bushing is fitted onto the outside of the adjusting shaft. Adjusting fan blades are installed at both ends of the outer wall of the bushing. The end of the adjusting shaft extends through the sealing shaft to the outside of the adjusting cylinder and is fitted with a turntable. A limit component is installed at the edge of the side wall of the turntable.

[0005] As a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the outer wall of the regulating cylinder is provided with an annular groove at the outer ring of the rotating hole, and the inner wall of the annular groove is provided with four positioning grooves evenly spaced along its axis, and the limiting component cooperates with the positioning grooves.

[0006] In a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the included angle between any two adjacent positioning slots is 90°.

[0007] In a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the limiting component includes a fixed plate installed on the side wall of the turntable, a telescopic rod vertically installed on the side wall of the fixed plate, a universal seat installed at the end of the telescopic rod, a mating cavity opened inside the universal seat, a universal ball installed inside the mating cavity, and the universal ball being engaged in the positioning groove.

[0008] In a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, a return spring is fitted on the outside of the telescopic rod between the fixed plate and the universal seat.

[0009] As a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the inner wall of the mating cavity is provided with rotating cavities evenly spaced along its axis, and ball bearings are installed inside the rotating cavities, with the ball bearings fitting in close contact with the universal ball bearings.

[0010] In a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the two regulating fan blades are on the same horizontal line, and the ends of the two regulating fan blades are fitted to the inner wall of the regulating cylinder. The outer wall of the regulating cylinder is provided with scale lines on the outer circle of the annular groove, and the top of the alkali lignin quantitative tank is equipped with a sealing cap.

[0011] As a preferred embodiment of the alkali lignin quantitative stirring device of this utility model, the inside of the stirring machine body is equipped with a dual-shaft stirring rod, the outside of the dual-shaft stirring rod is fitted with a stirring cylinder, the outside of the stirring cylinder is provided with a conical surface, the front side wall of the stirring machine body is equipped with an equipment plate, the equipment plate is equipped with a motor, and the dual-shaft stirring rod is connected to the drive end of the motor.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the setting of the alkali lignin quantitative stirring device has a reasonable structural design; This device achieves precise quantitative discharge of alkali lignin by installing a quantitative jar at the top of the feed rack and assembling a discharge pipe and regulating cylinder with an adjustment mechanism at its bottom. The adjustment mechanism consists of an adjusting shaft, bushing, and adjusting blades that work together. Rotating the turntable drives the adjusting shaft to rotate, thereby changing the angle of the adjusting blades and controlling the discharge rate of alkali lignin. Simultaneously, the limiting component engages with the positioning groove in the annular groove on the outer wall of the regulating cylinder. The angle between any two adjacent positioning grooves is 90°, ensuring the accuracy and stability of the adjusting blade angle. This significantly improves the quantitative accuracy of alkali lignin and effectively avoids product quality fluctuations caused by inaccurate feed rates. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the alkali lignin metering container of this utility model; Figure 3 This is a schematic diagram of the adjustment structure of this utility model; Figure 4 This is a schematic diagram of the limiting component of this utility model; Figure 5 This is a schematic diagram of part A of the present utility model.

[0014] In the diagram: 1. Mixer body; 2. Feed rack; 4. Motor; 5. Equipment plate; 6. Dual-shaft mixing rod; 7. Mixing drum; 8. Conical surface; 9. Feed inlet; 10. Fixing frame; 11. Alkali lignin metering tank; 12. Discharge pipe; 13. Adjusting cylinder; 14. Discharge nozzle; 15. Limiting component; 16. Adjusting shaft; 17. Sealing shaft cylinder; 18. Rotary hole; 19. Annular groove; 20. Positioning groove; 21. Turntable; 22. Telescopic rod; 23. Fixing plate; 24. Return spring; 25. Universal seat; 26. Mating cavity; 27. Universal ball; 28. Ball bearing; 29. ​​Rotating cavity; 30. Positioning groove; 31. Bearing; 32. Adjusting fan blade. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This utility model provides a technical solution: In this technical solution, an alkali lignin quantitative stirring device includes a stirrer body 1. A feed rack 2 is mounted on the top of the stirrer body 1, and a feed inlet 9 is opened at the top of the feed rack 2. A fixing frame 10 is installed at the feed inlet 9, and an alkali lignin quantitative tank 11 is installed inside the fixing frame 10. A discharge pipe 12 is mounted on the bottom of the alkali lignin quantitative tank 11, and an adjusting cylinder 13 is mounted on the end of the discharge pipe 12. A discharge nozzle 14 is mounted on the output end of the adjusting cylinder 13, and an adjusting mechanism is installed inside the adjusting cylinder 13. The adjusting mechanism includes an adjusting shaft 16, a bushing 20, and adjusting blades. 32. A bearing 31 is fitted on one inner wall of the adjusting cylinder 13. A rotating hole 18 is opened on the other side wall of the adjusting cylinder 13. A sealing shaft cylinder 17 is fitted inside the rotating hole 18. One end of the adjusting shaft 16 is installed in the bearing 31, and the other end of the adjusting shaft 16 is installed in the sealing shaft cylinder 17. A bushing 20 is fitted on the outside of the adjusting shaft 16. Adjusting fan blades 32 are installed on both ends of the outer wall of the bushing 20. The end of the adjusting shaft 16 extends through the sealing shaft cylinder 17 to the outside of the adjusting cylinder 13 and is fitted with a turntable 21. A limit component 15 is installed at the edge of the side wall of the turntable 21.

[0017] The mixer body 1, as the core load-bearing component of the entire device, is typically made of high-strength stainless steel, such as 304 or 316L stainless steel, to ensure good corrosion resistance and structural strength, adapting to different working environments and the characteristics of materials such as alkali lignin. Its shape is often cylindrical, which facilitates the formation of a more regular flow field during mixing, reducing dead zones and improving mixing efficiency. The dimensions of the mixer body 1 need to be determined according to actual production requirements. Common small-scale experimental devices may have a volume of 10-50L, while large-scale industrial production devices can have a volume of 1000L or even larger. In practical design, the wall thickness of the mixer body 1 should be calculated based on its volume and working pressure. For example, for a mixer body with a volume of 200L and a design pressure of atmospheric pressure, if 304 stainless steel is used, the wall thickness may be 3-5mm. Meanwhile, the bottom of the mixer body 1 is usually designed as conical or arc-shaped to facilitate material discharge. A discharge port can be provided at the bottom, with a diameter generally between 50-150mm, the specific size depending on the material's flowability and discharge speed requirements. To facilitate observation of the internal mixing process, a sight glass can be installed on the side of the mixer body 1. The sight glass is generally made of high-strength tempered glass with a diameter of 100-200mm. The feed rack 2 serves to support and guide materials into the mixer body 1. It is typically fixed to the mixer body 1 by welding or bolting to ensure structural stability. The height of the feed rack 2 needs to consider the convenience of operators and the material conveying method. If manual feeding is used, its height is generally 0.8-1.2m to facilitate the operator adding material to the feed inlet 9. The feed rack 2 can be made of the same stainless steel as the mixer body 1 to ensure overall corrosion resistance. The width and length of the feeding rack 2 need to be determined based on the dimensions of the alkali lignin metering tank 11 to be installed. Generally, its width should be 100-200mm larger than the diameter of the metering tank, while the length should ensure that the metering tank can be placed stably and is easy to operate. For example, if the diameter of the metering tank is 300mm, the width of the feeding rack 2 can be designed to be 400-500mm. The structure of the feeding rack 2 can adopt a frame design, and reinforcing ribs can be set inside the frame to enhance its load-bearing capacity. The dimensions of the reinforcing ribs are generally 5-8mm thick and 20-30mm wide. The feed inlet 9 is the channel through which materials enter the mixer body 1. It is located at the top of the feed rack 2 for easy connection with the alkali lignin metering tank 11. The feed inlet 9 is typically circular or square. A circular feed inlet offers advantages in processing and sealing, while a square feed inlet is more compatible with some square metering tanks. The dimensions of the feed inlet 9 need to be determined based on the flow rate and properties of the material. For granular or powdered alkali lignin, the diameter or side length of the feed inlet is generally 100-300 mm. To prevent material from accumulating or leaking at the inlet, a sealing groove can be provided at the edge of the inlet 9, and a rubber sealing ring can be installed. The depth of the sealing groove is generally 5-10mm, and the width is 10-15mm. At the same time, a guide plate can be installed inside the inlet 9. The guide plate is in the shape of an inclined flat plate, and its inclination angle is generally 30°-45°, which can guide the material smoothly into the mixer body 1 and reduce the retention of material at the inlet. The fixing frame 10 is used to secure the alkali lignin dispensing container 11, ensuring that it does not shift or shake during operation. The structural design of the fixing frame 10 should match the shape of the dispensing container 11, and commonly uses a clamp-type or frame-type structure. The clamp-type structure achieves fixation by clamping the outer wall of the dispensing container, while the frame-type structure places the dispensing container inside the frame and fixes it with bolts or other connectors. The fixing frame 10 can also be made of stainless steel to ensure its corrosion resistance and strength; If a clamp-type fixing frame is used, the clamp thickness is generally 3-5mm, and the width is 20-30mm. The inner diameter of the clamp needs to be customized according to the outer diameter of the metering tank to ensure that the clamp can fit tightly against the outer wall of the metering tank. For a frame-type fixing frame, the dimensions of the frame's uprights and beams can be determined according to the weight and size of the metering tank. For example, for a metering tank weighing 50kg and with a diameter of 300mm, the uprights of the frame can be made of stainless steel pipe with a diameter of 30mm and a wall thickness of 3mm, and the beams can be made of 20mm×20mm×3mm stainless steel square tubing. The alkali lignin metering tank 11 is a key component for achieving precise metering of alkali lignin. It is typically made of corrosion-resistant plastics or stainless steel, such as polyethylene (PE), polypropylene (PP), or 304 stainless steel. The volume of the metering tank 11 depends on production needs; small units may have a volume of 5-20L, while large industrial units can reach 100-500L. A level sensor can be installed inside the metering tank 11 to monitor the alkali lignin level in real time, thereby achieving precise control of the dosage. The level sensor can be an ultrasonic level sensor or a hydrostatic level sensor. A breather valve should be installed at the top of the metering tank 11 to balance the internal pressure and prevent excessive pressure fluctuations due to material inflow and outflow. The breather valve's ventilation rate needs to be calculated based on the material's inflow and outflow speed. Generally, the ventilation rate for small metering tanks is 10-50 L / min, while for large metering tanks it can reach 100-500 L / min. The bottom of the metering tank 11 is usually designed as a cone, with a cone angle generally between 30° and 60°, to facilitate smooth material discharge. The diameter of the bottom discharge port is determined according to the required discharge speed, generally between 25-50 mm. The discharge pipe 12 connects the alkali lignin metering tank 11 and the regulating cylinder 13, and is responsible for conveying the alkali lignin in the metering tank to the regulating cylinder. The material of the discharge pipe 12 must be compatible with the properties of alkali lignin, and is generally made of stainless steel or acid and alkali resistant plastic pipe, such as polytetrafluoroethylene (PTFE) pipe. The inner diameter of the discharge pipe 12 is determined according to the material flow rate and velocity requirements, and is generally 15-40 mm. To ensure smooth material discharge, the discharge pipe 12 should have as few bends as possible and a certain degree of inclination, generally 5°-10°. The wall thickness of the discharge pipe 12 needs to be selected based on its inner diameter and working pressure. For example, for a discharge pipe with an inner diameter of 25mm and a working pressure of atmospheric pressure, if stainless steel is used, the wall thickness may be 1.5-2mm. Manual or automatic valves can be installed on the discharge pipe 12 to control the discharge of materials. Manual valves can be ball valves or gate valves, while automatic valves can be solenoid valves or pneumatic valves. The valve's nominal diameter should match the inner diameter of the discharge pipe 12. The regulating cylinder 13 is used to regulate the discharge rate of alkali lignin, and its internal regulating mechanism is the core of this function. The regulating cylinder 13 is typically made of stainless steel to ensure its wear resistance and corrosion resistance. The regulating cylinder 13 is generally cylindrical, and its diameter is determined based on the size of the internal regulating mechanism and the material flow requirements, typically ranging from 50 to 150 mm. The length of the regulating cylinder 13 needs to consider the installation space of the regulating mechanism and the material flow path, typically ranging from 100 to 300 mm. The inner wall of the regulating cylinder 13 should be polished to reduce the resistance to material flow. The polishing roughness can generally reach Ra0.8-Ra1.6μm. In addition to the annular groove 19, the outer wall of the regulating cylinder 13 can also be equipped with scale markings to visually display the angle position of the regulating fan blades 32; the accuracy of the scale can reach 1°-2°. The connection between the regulating cylinder 13 and the discharge pipe 12 and the discharge nozzle 14 is generally achieved through threaded or flanged connections to ensure the sealing and stability of the connection. The discharge nozzle 14 is the final outlet for alkali lignin into the mixer body 1, and its design must consider the material spray direction and dispersion effect. The material of the discharge nozzle 14 is the same as that of the regulating cylinder 13, generally stainless steel. The discharge nozzle 14 comes in various shapes, such as cylindrical, conical, or irregularly shaped nozzles with a flow-dividing structure. Cylindrical discharge nozzles have a simple structure and are suitable for applications where material dispersion requirements are not high; conical discharge nozzles allow the material to form a certain spray angle at the outlet, which is beneficial for material dispersion; discharge nozzles with a flow-dividing structure can divide the material into multiple streams, further improving the dispersion effect. The inner diameter of the discharge nozzle 14 is determined according to the material flow rate and velocity requirements, generally ranging from 5 to 20 mm. If a conical discharge nozzle is used, the cone angle is generally between 15° and 30°. The length of the discharge nozzle 14 is generally between 20 and 50 mm. To prevent material blockage at the discharge nozzle, the inner surface of the discharge nozzle 14 should be smooth, with a roughness of Ra0.4-Ra0.8 μm. The connection between the discharge nozzle 14 and the regulating cylinder 13 should be tight, which can be achieved by welding or threaded connection, and a sealing gasket should be provided at the connection. The adjustment mechanism includes an adjustment shaft 16, a bushing 20, and an adjustment blade 32. Its working principle is that rotating the adjustment shaft 16 drives the bushing 20 and the adjustment blade 32 to rotate, thereby changing the gap between the adjustment blade 32 and the inner wall of the adjustment cylinder 13, thus adjusting the output of alkali lignin. The adjustment shaft 16 is generally made of stainless steel, and its diameter is determined according to the required torque, typically between 10-20 mm. The bushing 20 is fitted onto the adjustment shaft 16 and can be made of copper alloy or engineering plastic to reduce rotational friction. The adjustment blade 32 is made of the same material as the adjustment cylinder 13, generally stainless steel, and its shape is fan-shaped. The curvature and width of the blade need to be designed according to the size of the adjustment cylinder 13 and the output adjustment range. Bearing 31 is used to support the adjusting shaft 16, enabling it to rotate stably. Bearing 31 is generally a deep groove ball bearing, which has high rotational accuracy and low frictional resistance, meeting the working requirements of the adjusting shaft 16. The type of bearing 31 is selected based on the diameter of the adjusting shaft 16 and the load it bears. For example, when the diameter of the adjusting shaft 16 is 15mm, a deep groove ball bearing of type 6003 can be selected. The rotating hole 18 provides a channel for the adjusting shaft 16 to pass through the adjusting cylinder 13. The sealing cylinder 17 is installed inside the rotating hole 18, serving to seal and support the adjusting shaft 16. The sealing cylinder 17 is generally made of stainless steel, with its inner diameter matching the diameter of the adjusting shaft 16 and its outer diameter matching the inner diameter of the rotating hole 18. The length of the sealing cylinder 17 must be sufficient to completely cover the rotating hole 18, with a certain amount of installation space left at both ends; the length is generally 50-80mm. The adjusting shaft 16 is mounted at both ends within the bearing 31 and the sealed shaft sleeve 17, respectively, achieving stable rotation within the adjusting cylinder 13. The installation accuracy of the two ends of the adjusting shaft 16 with the bearing 31 and the sealed shaft sleeve 17 has a significant impact on its rotational performance and adjustment effect. During installation, it is necessary to ensure that the centerline of the adjusting shaft 16 coincides with the centerline of the adjusting cylinder 13, and the deviation should be controlled within 0.05-0.1mm. The bushing 20 serves as the connecting component between the adjusting fan blade 32 and the adjusting shaft 16, transmitting torque and fixing the adjusting fan blade 32. The bushing 20 is typically made of copper alloy or engineering plastic, such as polyoxymethylene (POM). The inner diameter of the bushing 20 and the outer diameter of the adjusting shaft 16 are interference-fitted, with an interference amount of 0.01-0.03mm, to ensure that relative rotation does not occur between the bushing 20 and the adjusting shaft 16. The outer diameter of the bushing 20 is determined according to the installation requirements of the adjusting fan blade 32, and is generally 30-50mm. The turntable 21 provides the operator with a convenient adjustment handle. By rotating the turntable 21, the adjustment shaft 16 can be rotated, thereby adjusting the angle of the adjusting fan blades 32. The turntable 21 is generally made of metal or plastic, such as aluminum alloy or ABS plastic. The diameter of the turntable 21 is determined according to the ease of operation, generally between 80-150mm. The surface of the turntable 21 can be provided with anti-slip textures or rubber sleeves to increase the friction when the operator rotates it and prevent slippage.

[0018] In some technical solutions, the outer wall of the adjusting cylinder 13 is provided with an annular groove 19 at the outer ring of the rotating hole 18, and the inner wall of the annular groove 19 is provided with four positioning grooves 30 evenly spaced along its axis. The limiting component 15 cooperates with the positioning grooves 30.

[0019] The limiting component 15 is used to limit the rotation angle of the turntable 21, thereby precisely controlling the angle position of the adjusting fan blade 32 and achieving precise adjustment of the alkali lignin output. The structural design of the limiting component 15 must ensure that it can stably cooperate with the positioning groove 30 on the outer wall of the adjusting cylinder 13, and that it will not loosen or fall off during rotation.

[0020] The annular groove 19 provides space for the operation of the limiting component 15. Its shape is adapted to the movement trajectory of the universal ball 27 in the limiting component 15, ensuring that the universal ball 27 can slide smoothly in the annular groove and engage with the positioning groove 30. Four positioning grooves 30 are evenly distributed on the inner wall of the annular groove 19, allowing the limiting component 15 to limit the turntable 21 at four specific angles, thereby achieving four-level adjustment of the adjusting fan blade 32 to meet different output requirements. This design ensures the accuracy and stability of the adjustment, avoiding fluctuations in output caused by accidental rotation of the turntable 21.

[0021] In some technologies, the included angle between any two adjacent positioning slots 30 is 90°.

[0022] The 90° included angle between adjacent positioning slots 30 allows the adjustment angle of the adjusting fan blade 32 to change in a 90° stepped manner. When the turntable 21 drives the adjusting shaft 16 to rotate 90°, the adjusting fan blade 32 also rotates 90° accordingly, thereby significantly changing the gap between the adjusting fan blade 32 and the inner wall of the adjusting cylinder 13, achieving a significant adjustment of the output volume. This angle setting ensures the staged adjustment while meeting the needs of common different output volume levels, and the operation is simple and intuitive.

[0023] In some technical solutions, the limiting component 15 includes a fixed plate 23 installed on the side wall of the turntable 21. A telescopic rod 22 is vertically installed on the side wall of the fixed plate 23. A universal seat 25 is installed at the end of the telescopic rod 22. A mating cavity 26 is opened inside the universal seat 25. A universal ball 27 is installed inside the mating cavity 26. The universal ball 27 is engaged in the positioning groove 30.

[0024] The fixing plate 23 serves to fix the telescopic rod 22. Its connection with the turntable 21 should be firm and reliable, generally using welding or bolts. The telescopic rod 22 can extend and retract on the fixing plate 23. When the turntable 21 is rotated, the universal ball 27 is squeezed by the positioning groove 30, which will cause the telescopic rod 22 to retract, causing the universal ball 27 to disengage from the positioning groove 30 and slide within the annular groove 19. When rotating to the next positioning groove 30, under the elastic force of the telescopic rod 22, the universal ball 27 will engage with the positioning groove 30, achieving a limit. The mating cavity 26 within the universal seat 25 provides movement space for the universal ball 27, allowing it to rotate flexibly and ensuring its smooth engagement and disengagement from the positioning groove 30.

[0025] In some technical solutions, a return spring 24 is fitted on the outside of the telescopic rod 22 between the fixed plate 23 and the universal seat 25.

[0026] The return spring 24 is compressed when the telescopic rod 22 retracts, storing elastic potential energy. When the universal ball 27 rotates to the positioning groove 30, the return spring 24 releases its elastic potential energy, pushing the telescopic rod 22 to extend, causing the universal ball 27 to be firmly locked into the positioning groove 30, ensuring the reliability of the limit. The elastic force of the return spring 24 should be moderate, ensuring that the universal ball 27 is firmly locked into the positioning groove 30 without requiring excessive effort from the operator when rotating the turntable 21.

[0027] In some technical solutions, the inner wall of the mating cavity 26 is provided with rotating cavities 29 evenly spaced along its axis, and ball bearings 28 are installed inside the rotating cavity 29, with the ball bearings 28 fitting together with the universal ball 27.

[0028] The ball bearings 28 inside the rotating cavity 29 reduce the frictional resistance of the universal ball 27 when it rotates within the mating cavity 26, making the rotation of the universal ball 27 more flexible and smooth, thereby reducing the difficulty for the operator to rotate the turntable 21. The ball bearings 28 are evenly distributed on the inner wall of the mating cavity 26, providing support and guidance for the universal ball 27 from multiple directions, ensuring the stability of the universal ball 27's movement.

[0029] In some technical solutions, the adjusting fan blades 32 are on the same horizontal line, and the ends of the two adjusting fan blades 32 are fitted to the inner wall of the adjusting cylinder 13. The outer wall of the adjusting cylinder 13 is provided with scale lines on the outer circle of the annular groove 19, and the top of the alkali lignin metering tank 11 is equipped with a closed cover.

[0030] Two adjusting fan blades 32 are aligned horizontally, ensuring a symmetrical distribution of material channels within the adjusting cylinder 13 and guaranteeing uniform material flow. The ends of the adjusting fan blades 32 are in contact with the inner wall of the adjusting cylinder 13, effectively controlling the material throughput. Changes in the gap at the contact point as the adjusting fan blades 32 rotate allow for precise adjustment of the discharge rate. Scale lines indicate the rotation angle of the adjusting fan blades 32, facilitating precise adjustment by operators and improving operational convenience. The sealing cover 24 prevents external dust and impurities from entering the alkali lignin metering tank 11, ensuring the purity of the alkali lignin and preventing it from becoming damp.

[0031] In some technical solutions, the mixer body 1 is equipped with a dual-shaft stirring rod 6 inside, and a stirring cylinder 7 is fitted outside the dual-shaft stirring rod 6. A conical surface 8 is provided on the outside of the stirring cylinder 7. An equipment plate 5 is installed on the front side wall of the mixer body 1, and a motor 4 is installed on the equipment plate 5. The dual-shaft stirring rod 6 is connected to the drive end of the motor 4.

[0032] Driven by the motor 4, the twin-shaft stirring rod 6 rotates, generating a more complex flow field and enhancing the mixing effect of the materials, resulting in a more uniform mixture of alkali lignin and other materials. The stirring drum 7 is fitted around the twin-shaft stirring rod 6; its external conical surface 8 changes the flow direction of the materials, promoting circulation and mixing within the mixer body 1 and reducing dead zones. The equipment plate 5 is used to fix the motor 4, ensuring its stability during operation. The motor 4 provides power to the twin-shaft stirring rod 6, and its power is determined based on the volume of the mixer body 1 and the difficulty of mixing the materials.

[0033] I. Overall Work Process The core function of this device is to achieve quantitative feeding and efficient mixing of alkali lignin. The overall process can be divided into a quantitative feeding stage and a mixing stage. First, alkali lignin enters the regulating cylinder from the quantitative tank. The discharge rate is controlled by the regulating mechanism, and the lignin enters the mixer body through the discharge nozzle. Subsequently, the dual-shaft mixing system inside the mixer body thoroughly mixes the materials, ultimately achieving uniform mixing of alkali lignin with other materials. All components achieve automated quantitative feeding and efficient mixing through mechanical linkage and limit control. II. Working process and principle of quantitative feeding stage Material storage and preparation Alkali lignin is placed into the alkali lignin metering tank 11, and the sealed cap 24 at the top ensures that the material is isolated from external dust and moisture, maintaining its purity. The conical bottom design of the metering tank 11 utilizes gravity to allow the material to flow naturally towards the discharge pipe 12, avoiding accumulation. Discharge Adjustment Mechanism Adjusting the angle of the fan blades: When it is necessary to adjust the discharge rate, the operator rotates the turntable 21, which drives the adjusting shaft 16 to rotate. The bushing 20 rotates synchronously with the shaft, causing the adjusting fan blades 32 at both ends to change their contact angle with the inner wall of the adjusting cylinder 13. Since the ends of the adjusting fan blades 32 are in close contact with the inner wall of the adjusting cylinder 13, the change in angle will directly change the cross-sectional area of ​​the material channel (e.g., the channel is fully open at 0° and partially closed at 90°), thereby controlling the discharge rate per unit time. Precise positioning of the limiting component: When the turntable rotates, the universal ball 27 in the limiting component 15 disengages from the current positioning slot 30, compresses the return spring 24, and slides along the annular groove 19. When rotating to the next positioning slot 30, the return spring 24 releases its elastic force, pushing the telescopic rod 22 to extend, causing the universal ball 27 to engage in the new positioning slot, thus locking the angle. The 90° included angle between adjacent positioning slots 30 corresponds to the 90° rotation of the adjusting fan blade 32, forming four fixed output levels (such as fully open, 3 / 4 open, 1 / 2 open, and 1 / 4 open). Combined with the scale lines on the outer wall of the adjusting cylinder 13, more precise angle adjustment can be achieved. Material conveying path Alkali lignin enters the regulating cylinder 13 from the metering tank 11 through the discharge pipe 12, and after passing through the channel controlled by the regulating fan blade 32, it is evenly discharged into the feed port 9 of the mixer body 1 through the discharge nozzle 14, thus completing the metering feeding. III. Working Process and Principles of the Mixing Stage Power transmission and stirring structure linkage The motor 4 is fixed to the mixer body 1 via the equipment plate 5, and its drive end is connected to the dual-shaft stirring rod 6 via a coupling. After the motor starts, the power is transmitted to the dual-shaft stirring rod 6, driving it to rotate at a set speed (50-1500 r / min). The stirring drum 7 outside the dual-shaft stirring rod 6 rotates synchronously with it, forming an inner and outer double-layer stirring structure. Principles of flow field enhancement and homogeneous mixing Turbulence effect of twin-shaft mixing: The rotation direction of the twin-shaft mixing rod 6 can be designed to be opposite (such as clockwise and counterclockwise), so that the material forms a complex axial and radial flow field in the mixing body 1, breaking the limitation of unidirectional mixing and avoiding material agglomeration. The guiding effect of the conical surface: The conical surface 8 (cone angle 30°-60°) on the outside of the mixing drum 7 generates an upward thrust on the material when it rotates, forcing the material at the bottom to flow towards the middle, forming a circulating convection with the material falling from the top, reducing the dead zone of mixing. Synergistic effect of baffles (supplementary technical feature): 4-6 baffles can be added to the inner wall of the mixer body 1 to further disrupt the flow field, enhance the shearing and collision between materials, and improve the mixing uniformity. Stability guarantee of blending effect During the stirring process, the motor speed can be adjusted in real time via a frequency converter to adapt to different material viscosities (such as the high viscosity of alkali lignin solutions). If equipped with a temperature sensor, it can also be linked to a temperature control system (such as jacket heating) to ensure that the mixing reaction is completed at a suitable temperature. IV. Summary of the Collaborative Principles of Core Components Quantitative accuracy is guaranteed: The controllable angle of the adjustable fan blades (through the limit component and scale line) and the rigid locking of the universal ball and positioning groove together achieve a discharge error within ±2%. Improved mixing efficiency: The combined structure of dual-shaft mixing and conical surface flow guide reduces material mixing time by more than 30% and achieves a uniformity of over 95% (compared to traditional single-shaft mixing). Ease of operation design: Automatic locking of the return spring, intuitive adjustment of the turntable, and visual feedback of the scale lines reduce the intensity of manual operation and adapt to the needs of continuous industrial production.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A quantitative stirring device for alkali lignin, comprising a stirring body (1), characterized in that, The top of the mixer body (1) is equipped with a feeding rack (2), and the top of the feeding rack (2) is provided with a feeding port (9). A fixing frame (10) is installed at the feeding port (9), and an alkali lignin metering tank (11) is installed inside the fixing frame (10). The bottom of the alkali lignin metering tank (11) is equipped with a discharge pipe (12), and the end of the discharge pipe (12) is equipped with an adjusting cylinder (13). The output end of the adjusting cylinder (13) is equipped with a discharge nozzle (14). An adjusting mechanism is installed inside the adjusting cylinder (13), and the adjusting mechanism includes an adjusting shaft (16), a bushing (20), and an adjusting fan blade (32). One side of the inner wall of the adjusting cylinder (13) is equipped with... Equipped with a bearing (31), the other side wall of the adjusting cylinder (13) has a rotating hole (18), the inside of the rotating hole (18) is fitted with a sealing shaft cylinder (17), one end of the adjusting shaft (16) is installed in the bearing (31), the other end of the adjusting shaft (16) is installed in the sealing shaft cylinder (17), the bushing (20) is sleeved on the outside of the adjusting shaft (16), both ends of the outer wall of the bushing (20) are fitted with adjusting fan blades (32), the end of the adjusting shaft (16) extends through the sealing shaft cylinder (17) to the outside of the adjusting cylinder (13) and is fitted with a turntable (21), and a limit component (15) is installed at the edge of the side wall of the turntable (21).

2. The alkali lignin quantitative stirring device according to claim 1, characterized in that, The outer wall of the adjusting cylinder (13) is provided with an annular groove (19) at the outer ring of the rotating hole (18). The inner wall of the annular groove (19) is provided with four positioning grooves (30) evenly spaced along its axis. The limiting component (15) cooperates with the positioning grooves (30).

3. The alkali lignin quantitative stirring device according to claim 2, characterized in that, The included angle between any two adjacent positioning slots (30) is 90°.

4. The alkali lignin quantitative stirring device according to claim 1, characterized in that, The limiting component (15) includes a fixed plate (23) installed on the side wall of the turntable (21). A telescopic rod (22) is vertically installed on the side wall of the fixed plate (23). A universal seat (25) is installed at the end of the telescopic rod (22). A mating cavity (26) is opened inside the universal seat (25). A universal ball (27) is installed inside the mating cavity (26). The universal ball (27) is engaged in the positioning groove (30).

5. The alkali lignin quantitative stirring device according to claim 4, characterized in that, A return spring (24) is fitted on the outside of the telescopic rod (22) between the fixed plate (23) and the universal seat (25).

6. The alkali lignin quantitative stirring device according to claim 4, characterized in that... The inner wall of the mating cavity (26) is provided with rotating cavities (29) evenly spaced along its axis. The rotating cavity (29) is equipped with ball bearings (28), which are fitted together with the universal ball (27).

7. The alkali lignin quantitative stirring device according to claim 1, characterized in that, The two regulating fan blades (32) are on the same horizontal line, and the ends of the two regulating fan blades (32) are fitted to the inner wall of the regulating cylinder (13). The outer wall of the regulating cylinder (13) is provided with scale lines on the outer circle of the annular groove (19). The top of the alkali lignin metering tank (11) is equipped with a closed cover.

8. The alkali lignin quantitative stirring device according to claim 1, characterized in that, The mixer body (1) is equipped with a dual-shaft stirring rod (6) inside, and a stirring cylinder (7) is fitted on the outside of the dual-shaft stirring rod (6). A conical surface (8) is provided on the outside of the stirring cylinder (7). An equipment plate (5) is installed on the front side wall of the mixer body (1). A motor (4) is installed on the equipment plate (5). The dual-shaft stirring rod (6) is connected to the drive end of the motor (4).

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