A material premixing mechanism

Abstract

This invention belongs to the field of mixing equipment technology, specifically a material premixing mechanism, including a mixing tank. A top cover is installed on the top of the mixing tank, and a plug is installed on the bottom. A feeding hopper is welded to one side of the mixing tank, and a feed pipe is installed on the rear side of the feeding hopper. A discharge pipe is welded to the other side of the mixing tank near the bottom, and a conveying pipe is fixedly installed at the bottom end of the discharge pipe. A load-bearing plate is installed on the top of the top cover, and a second drive motor is installed on the top of the load-bearing plate. A circular tube is fixedly installed at the end of the power output shaft of the second drive motor. This invention utilizes the cooperation between a stirring plate on the outside of the circular tube and a second spiral blade. By leveraging material resistance and magnetic transmission characteristics, the stirring plate disperses the material at a relatively high speed, while the second spiral blade conveys the material upwards at a lower speed. After being lifted, the material naturally falls back down under gravity, forming an up-and-down circulation, ensuring thorough mixing and uniform blending of the material.

Description

Technical Field

[0001] This invention belongs to the field of mixing equipment technology, specifically a material premixing mechanism. Background Technology

[0002] In the production processes of industries such as chemicals, pharmaceuticals, food, and building materials, material premixing is a crucial step, as the uniformity of premixing directly affects the quality of subsequent products and reaction efficiency. Existing material premixing equipment mostly employs single-shaft paddle mixers or ribbon mixers.

[0003] Material premixing is a key step in industrial production, but most existing premixing equipment uses single-shaft, same-speed drive, which makes it difficult to balance dispersing and conveying efficiency. High speed results in short material residence time and uneven mixing, while low speed cannot effectively disperse clumps of material. At the same time, traditional rigid transmission is difficult to adapt to real-time changes in material resistance and is prone to overload jamming. Unidirectional lifting also lacks an up-and-down circulating flow field, resulting in mixing dead zones. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a material premixing mechanism that solves the problems mentioned above.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a material premixing mechanism, including a mixing tank; a top cover is installed on the top of the mixing tank, a plug is installed on the bottom of the mixing tank, a feeding bin is welded to one side of the mixing tank, a feed pipe is installed on the rear side of the feeding bin, a discharge pipe is welded to the other side of the mixing tank near the bottom, a conveying pipe is fixedly installed at the bottom end of the discharge pipe, a load-bearing plate is installed on the top of the top cover, a second drive motor is installed on the top of the load-bearing plate, a circular tube is fixedly installed at the end of the power output shaft of the second drive motor, a plurality of stirring plates are fixedly installed at equal intervals on the outer peripheral sidewall of the circular tube, a connecting rod is rotatably connected to the inner cavity of the circular tube near the bottom end through a first bearing, a second spiral blade is fixedly installed on the outer peripheral sidewall of the connecting rod, a fixing rod is provided at the top end of the connecting rod, a plurality of grooves are opened on the inner cavity sidewall of the circular tube, a second magnetic strip is fixedly installed on the opposite side of the inner cavity of each groove, and a plurality of first magnetic strips are fixedly installed on the outer periphery of the fixing rod.

[0006] Preferably, a bracket is fixedly installed on the top of the top cover, a first electric push rod is fixedly installed on the top of the inner cavity of the bracket, a rotating unit is provided between the bottom end of the first electric push rod and the fixed rod, a spline strip is fixedly installed on the bottom end of the fixed rod, a spline groove is opened on the top of the connecting rod, and the spline strip is slidably connected in the inner cavity of the spline groove, and a speed sensor is provided above the connecting rod.

[0007] Preferably, the rotating unit includes a magnetic clutch located between the first electric push rod and the fixed rod, with both ends of the magnetic clutch being rotatably connected to the ends of the first electric push rod and the fixed rod, respectively.

[0008] Preferably, all of the stirring plates are arranged at an angle.

[0009] Preferably, the inner cavity of the mixing tank is provided with a number of material sensors, and the material sensor located at the bottom is positioned between the final position of the material conveyed by the second helical blade and the initial position of the material receiving tube.

[0010] Preferably, the outer periphery of the fixed rod is fitted with a sliding sleeve near the top and bottom ends by a second bearing. Several protrusions are fixedly installed on the outer periphery of the sliding sleeve. The inner wall of the round tube is provided with a sliding groove. The protrusions are slidably connected to the inner cavities of adjacent sliding grooves.

[0011] Preferably, the width of the groove cross-section is 0.1-0.5 mm wider than the width of the second magnetic strip cross-section.

[0012] The controller configuration for the material premixing mechanism includes the following steps: S1: The material distribution at different heights in the mixing tank is monitored in real time by several material sensors. Based on the amount and distribution of the mixed materials, the output speed of the second drive motor is controlled, thereby adjusting the speed of the circular tube and the stirring plate to make the materials mix evenly. S2: Based on the material sensor at the bottom layer detecting the continuity and stability of material conveying, the first electric push rod is controlled to drive the fixed rod and connecting rod to move axially, adjust the area of ​​the relative overlap between the first magnetic strip and the second magnetic strip, change the magnitude of magnetic transmission, and thus control the relative speed between the second spiral blade and the stirring plate. S3: By combining the feedback from the speed sensor and adjusting the magnetic force of the magnetic clutch to change the damping of the connecting rod rotation, the rotation speed range of the second helical blade is precisely controlled, so that the conveying capacity of the second helical blade matches the mixing capacity of the mixing plate, achieving maximum mixing efficiency and avoiding intermittent feeding.

[0013] Preferably, the inner cavity of the feeding hopper is movably penetrated by a first gate plate, and a second electric push rod is fixedly installed on the outer periphery of the feeding pipe near the top, with the top end of the second electric push rod being fixedly connected to the first gate plate.

[0014] Preferably, a connecting block is fixedly installed on the outer periphery of the mixing tank near the middle position, a third electric push rod is fixedly installed on the bottom of the connecting block, a second gate is fixedly installed on the bottom end of the third electric push rod, and the second gate is movably inserted into the inner cavity of the discharge pipe.

[0015] The beneficial effects of this invention are as follows: 1. This invention utilizes the mixing plate on the outside of the circular tube and the second spiral blade to combine material resistance and magnetic transmission characteristics, so that the mixing plate disperses the material at a faster speed, while the second spiral blade conveys the material upward at a lower speed. After being lifted, the material falls naturally under gravity, forming an up-and-down circulation, which ensures that the material is fully stirred and evenly mixed.

[0016] 2. This invention monitors the rotational speed of the connecting rod in real time using a speed sensor, and adjusts the fixed rod up and down using a first electric push rod to change the overlapping area of ​​the first and second magnetic strips to adjust the magnetic force. At the same time, a magnetic clutch is used to increase rotational damping, thereby achieving precise control of the rotational speed of the second helical blade, avoiding excessive conveying or intermittent supply of raw materials, and improving the uniformity of material mixing.

[0017] 3. By using an inclined stirring plate, the present invention generates an upward conveying force simultaneously during the rotation and stirring process, ensuring that the material is distributed throughout the entire stirring area of ​​the mixing tank, increasing the residence time and stirring time of the material in the tank, and further improving the mixing effect. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure from another perspective in this invention; Figure 3 This is a three-dimensional structural diagram of the load-bearing plate, the second drive motor, and the bracket in this invention. Figure 4 This is a cross-sectional view of the circular tube, stirring plate, and second helical blade in this invention; Figure 5 This is a three-dimensional structural diagram of the sliding sleeve, stirring plate, and first electric push rod in this invention. Figure 6 This is a three-dimensional structural diagram of the circular tube, fixed rod, and sliding groove of the present invention; Figure 7 This is a partial cross-sectional view of the connecting rod, the second helical blade, and the speed sensor of the present invention; Figure 8 This is a three-dimensional structural diagram of the connecting block, the third electric push rod, and the second gate of the present invention. Figure 9 This is a cross-sectional perspective view of the feeding bin, the second electric push rod, and the connecting block of the present invention. Figure 10 This is the invention Figure 4 Enlarged view of point A in the middle; Figure 11 This is the invention Figure 5Enlarged view at point B in the middle; Figure 12 This is the invention Figure 5 Enlarged view at point C; Figure 13 This is the invention Figure 8 Enlarged view of point D in the middle.

[0020] In the diagram: 1. Mixing tank; 2. Top cover; 3. Feed pipe; 4. Plug; 5. Discharge pipe; 6. Conveying pipe; 7. First drive motor; 8. Fixed shaft; 9. First spiral blade; 10. Loading plate; 11. Second drive motor; 12. Feeding hopper; 13. Support; 14. Round tube; 15. Stirring plate; 16. Connecting rod; 17. Second spiral blade; 18. First electric push rod; 19. Magnetic clutch; 20. Fixed rod; 21. First magnetic strip; 22. Second magnetic strip; 23. Groove; 24. Sliding sleeve; 25. Protrusion; 26. Sliding groove; 27. Spline strip; 28. Spline groove; 29. ​​Material sensor; 30. Speed ​​sensor; 31. Second electric push rod; 32. First gate; 33. Connecting block; 34. Third electric push rod; 35. Second gate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1 like Figure 1 - Figure 13As shown, a material premixing mechanism includes a mixing tank 1; a top cover 2 is installed on the top of the mixing tank 1, a plug 4 is installed on the bottom of the mixing tank 1, a feeding bin 12 is welded to one side of the mixing tank 1, a feed pipe 3 is installed on the rear side of the feeding bin 12, a discharge pipe 5 is welded to the other side of the mixing tank 1 near the bottom, a conveying pipe 6 is fixedly installed at the bottom end of the discharge pipe 5, a first drive motor 7 is installed at the front end of the conveying pipe 6, a fixed shaft 8 is fixedly installed at the end of the power output shaft of the first drive motor 7, the rear end of the fixed shaft 8 movably passes through the front side of the inner cavity of the conveying pipe 6 and is rotatably connected to the rear side of the inner cavity of the conveying pipe 6, a first spiral blade 9 is fixedly sleeved on the outer periphery of the fixed shaft 8, and the top cover 2... A load-bearing plate 10 is installed on the top, and a second drive motor 11 is installed on the top of the load-bearing plate 10. A circular tube 14 is fixedly installed on the power output shaft of the second drive motor 11. Several stirring plates 15 are fixedly installed at equal intervals on the outer periphery of the circular tube 14. A connecting rod 16 is rotatably connected to the inner cavity of the circular tube 14 near the bottom end through a first bearing. A second spiral blade 17 is fixedly installed on the outer periphery of the connecting rod 16. A fixing rod 20 is provided at the top of the connecting rod 16. Several grooves 23 are opened on the inner cavity sidewall of the circular tube 14. A second magnetic strip 22 is fixedly installed on the opposite side of the inner cavity of the groove 23. Several first magnetic strips 21 are fixedly installed on the outer periphery of the fixing rod 20.

[0023] During operation, the main material is first added into the feeding bin 12 through the feed pipe 3. At the same time, other auxiliary materials can be added through the inlet on the feeding bin 12. After the feeding is completed, the second drive motor 11 is started. Under the rotation of the power output shaft of the second drive motor 11, the circular tube 14 fixed to the end of the power output shaft is rotated. When the circular tube 14 rotates, the second magnetic strip 22 on the inner side wall of its cavity rotates accordingly. Through the magnetic attraction with the first magnetic strip 21 on the fixed rod 20, the fixed rod 20 and the connecting rod 16 rotate synchronously. During the upward conveying of materials, due to the resistance of the materials themselves, the rotation speed of the connecting rod 16 will be less than the rotation speed of the circular tube 14. The rotation of the connecting rod 16 drives the second spiral blade 17 to rotate, conveying the material at the bottom of the mixing tank 1 upward. At the same time, the stirring plate 15 on the outer periphery of the circular tube 14 rotates at a faster speed to fully disperse and stir the upward conveyed materials. After the materials are lifted to a high place, they fall naturally under gravity, ensuring that the materials are fully stirred and evenly mixed.

[0024] like Figure 7 As shown, a bracket 13 is fixedly installed on the top of the top cover 2. A first electric push rod 18 is fixedly installed on the top of the inner cavity of the bracket 13. A rotating unit is provided between the bottom end of the first electric push rod 18 and the fixed rod 20. A spline strip 27 is fixedly installed on the bottom end of the fixed rod 20. A spline groove 28 is opened on the top of the connecting rod 16, and the spline strip 27 is slidably connected to the inner cavity of the spline groove 28. A speed sensor 30 is provided above the connecting rod 16.

[0025] To further precisely control the relative rotational speed between the second helical blade 17 and the stirring plate 15, when the speed sensor 30 detects that the rotational speed of the connecting rod 16 is too high, causing the second helical blade 17 to convey excessive raw materials, the first electric push rod 18 is activated and pushes the fixed rod 20 upward, causing the spline strip 27 at the bottom of the fixed rod 20 to slide upward in the inner cavity of the spline groove 28, thereby reducing the overlapping area of ​​the first magnetic strip 21 and the second magnetic strip 22. As the overlapping area decreases, the magnetic force between the two weakens, thereby reducing the speed at which the second helical blade 17 conveys materials. This achieves more precise control over the speed difference between the second helical blade and the stirring plate 15, avoiding excessive conveying or intermittent supply of raw materials, ensuring the synergy of the stirring and conveying processes, and improving the uniformity of material mixing.

[0026] like Figure 5 As shown, the rotating unit includes a magnetic clutch 19 located between the first electric push rod 18 and the fixed rod 20. The two ends of the magnetic clutch 19 are rotatably connected to the ends of the first electric push rod 18 and the fixed rod 20, respectively.

[0027] To prevent the second helical blade 17 from experiencing a speed reduction lag when the stirring plate 15 is at a high speed ratio, a magnetic clutch 19 is provided. When current is input into the coil inside the magnetic clutch 19 to enhance the magnetic force, the resistance between the first electric push rod 18 and the fixed rod 20 increases accordingly, thereby increasing the damping of the rotation of the connecting rod 16, thus achieving precise control of the rotation speed of the second helical blade 17.

[0028] like Figure 6 As shown, a sliding sleeve 24 is fixedly sleeved on the outer periphery of the fixed rod 20 near the top and bottom ends by a second bearing (the speed sensor 30 is fixedly connected to the sliding sleeve 24 located at the bottom). Several protrusions 25 are fixedly installed on the outer periphery of the sliding sleeve 24. Sliding grooves 26 are opened on the inner sidewall of the round tube 14. The protrusions 25 are slidably connected to the inner cavities of adjacent sliding grooves 26.

[0029] By setting two sliding sleeves 24, the stability and guiding accuracy of the fixed rod 20 assembly can be improved. In addition, when the sliding sleeve 24 moves axially, the protrusion 25 on the sliding sleeve 24 will slide synchronously in the inner cavity of the sliding groove 26, ensuring the smooth and stable sliding process. The sliding sleeve 24 may deflect or get stuck during the movement.

[0030] like Figure 5 and Figure 12 As shown, the cross-sectional width of the groove 23 is 0.1-0.5 mm larger than the cross-sectional width of the second magnetic strip 22.

[0031] The second magnetic strip 22 is located in the inner cavity of the groove 23, which can prevent the sliding sleeve 24 from being obstructed by the second magnetic strip 22 during movement, thus preventing the second magnetic strip 22 from wearing. In addition, the second magnetic strip 22 is coated with grease, which has a protective effect.

[0032] Example 2 like Figure 3 , Figure 4 and Figure 5 As shown, several stirring plates 15 are all set at an angle.

[0033] By setting the stirring plate 15 in an inclined shape, the material can be stirred during the rotation of the stirring plate 15. Since the stirring plate 15 is inclined, the material can be conveyed upward during the rotation, so that there is material in the mixing tank 1 in the stirring area, increasing the stirring time of the material and thus improving the mixing effect of the material.

[0034] like Figure 4 and Figure 10 As shown, the inner cavity of the mixing tank 1 is equipped with several material sensors 29 (the material sensors 29 are located at different heights). The material sensor 29 located at the bottom is positioned between the final position of the material conveyed by the second spiral blade 17 and the initial position of the material received by the circular tube 14.

[0035] By setting multiple material sensors 29 on the inner wall of the mixing tank 1, it is possible to detect whether there is material at the corresponding height. If no material is detected, the rotation speed of the second spiral blade 17 and the stirring plate 15 can be increased to convey the material upward and disperse the material.

[0036] The controller configuration for the material premixing mechanism includes the following steps: S1: The material distribution at different heights in the mixing tank 1 is monitored in real time by several material sensors 29. Based on the amount and distribution of the mixed materials, the output speed of the second drive motor 11 is controlled, thereby adjusting the speed of the circular tube 14 and the stirring plate 15 to make the materials mix evenly. S2: Based on the material sensor 29 at the bottom layer detecting the continuity and stability of material conveying, the first electric push rod 18 is controlled to drive the fixed rod 20 and the connecting rod 16 to move axially, and the area of ​​the first magnetic strip 21 and the second magnetic strip 22 that overlaps is adjusted to change the magnitude of magnetic transmission, thereby controlling the relative speed between the second spiral blade 17 and the stirring plate 15. S3: Based on the feedback from the speed sensor 30, the damping of the connecting rod 16 is changed by adjusting the magnetic force of the magnetic clutch 19, thereby precisely controlling the rotational speed range of the second spiral blade 17. This ensures that the conveying capacity of the second spiral blade 17 matches the mixing capacity of the mixing plate 15, achieving maximum mixing efficiency and avoiding intermittent feeding.

[0037] Example 3 like Figure 9 As shown, the inner cavity of the feeding bin 12 is movably penetrated by the first gate plate 32, and the outer periphery of the feed pipe 3 is fixedly installed near the top, with the top end of the second electric push rod 31 fixedly connected to the first gate plate 32.

[0038] Driven by the second electric push rod 31, the first gate 32 can be precisely inserted into the inner cavity of the feeding bin 12, thereby sealing the feeding bin 12 tightly and preventing the material from flowing back into the feeding bin 12 during the mixing process, thus improving the efficiency of material mixing.

[0039] like Figure 8 As shown, a connecting block 33 is fixedly installed on the outer periphery of the mixing tank 1 near the middle position. A third electric push rod 34 is fixedly installed at the bottom of the connecting block 33. A second gate 35 is fixedly installed at the bottom end of the third electric push rod 34, and the second gate 35 is movably inserted into the inner cavity of the discharge pipe 5.

[0040] During the material mixing process, the second gate 35 is driven by the third electric push rod 34 to be inserted into the inner cavity of the discharge pipe 5 to block the discharge pipe 5 and prevent the material from leaking into the discharge pipe 5 during the mixing process, thereby avoiding the reduction of the overall mixing effect due to material loss or premature deposition.

[0041] During operation, the main material is first added into the feeding hopper 12 through the feed pipe 3, and other auxiliary materials can be added through the inlet on the feeding hopper 12. After feeding is completed, the second electric push rod 31 is activated, driving the first gate plate 32 to precisely insert into the inner cavity of the feeding hopper 12, sealing the feeding hopper 12 tightly to prevent material backflow during subsequent mixing. At the same time, the third electric push rod 34 drives the second gate plate 35 to insert into the inner cavity of the discharge pipe 5, sealing the discharge pipe 5 to prevent material from leaking into the discharge pipe 5 prematurely during mixing and affecting the mixing effect. The second drive motor 11 is then activated, and its power output shaft drives the circular tube 14 and its outer stirring plate 15 synchronously. When the circular tube 14 rotates, the second magnetic strip 22 on the inner wall of its cavity rotates accordingly, and drives the corresponding first magnetic strip 21 on the fixed rod 20 through magnetic attraction, thereby driving the fixed rod 20 and the connecting rod 16 connected by splines to rotate synchronously. The rotation of the connecting rod 16 drives the second spiral blade 17 to rotate, conveying the material at the bottom of the mixing tank 1 upward. During this process, since the stirring plates 15 are all set in an inclined shape, they not only stir the material in a circumferential manner, but also generate an upward axial thrust, which, together with the second spiral blade 17, lifts the material upward. After the material is lifted to a high place, it falls naturally under gravity, forming a three-dimensional circulating flow field that tumbles up and down in the mixing tank 1.Due to the resistance of the material itself, the initial rotational speed of the connecting rod 16 will be slightly lower than that of the circular tube 14, creating a reasonable speed difference between the stirring plate 15 (high-speed dispersing) and the second spiral blade 17 (low-speed lifting). This ensures that the material is both fully lifted and efficiently dispersed and mixed. To precisely control this speed difference, a speed sensor 30 is installed above the connecting rod 16 to monitor its rotational speed in real time. When the speed sensor 30 detects that the rotational speed of the connecting rod 16 is too high, potentially causing the second spiral blade 17 to convey excessive raw material, the first electric push rod 18 is activated and pushes the fixed rod 20 upward. The spline strip 27 at the bottom of the fixed rod 20 slides within the spline groove 28 at the top of the connecting rod 16, causing the fixed rod 20 to move upward. The overlap area between the first magnetic strip 21 and the second magnetic strip 22 on the circular tube 14 is reduced, thus weakening the magnetic force and reducing the transmission efficiency. This reduces the rotational speed of the second spiral blade 17, preventing excessive material transport or intermittent supply. A magnetic clutch 19 is provided between the first electric push rod 18 and the fixed rod 20. When the second spiral blade 17 and the stirring plate 15 need to slow down at a high speed ratio, the magnetic force of the magnetic clutch 19 is adjusted to increase the resistance between the first electric push rod 18 and the fixed rod 20, thereby increasing the damping of the rotation of the connecting rod 16. This effectively prevents the phenomenon of speed reduction lag and ensures the timeliness and accuracy of speed control. Multiple material sensors 29 are arrayed along the height direction on the inner wall of the mixing tank 1. When a certain height... When the material sensor 29 detects that there is no material in the area (indicating localized material shortage or discontinuity), the system automatically increases the speed of the second drive motor 11 based on this feedback signal, thereby synchronously increasing the speed of the second spiral blade 17 and the stirring plate 15. The enhanced upward conveying force forces the material to rise rapidly and diffuse, filling the upper empty area, eliminating stirring dead zones, and ensuring that the material is fully dispersed and mixed at all height levels. Sliding sleeves 24 are fitted onto the outer periphery of the fixed rod 20 near the top and bottom ends via bearings. When the fixed rod 20 is driven axially by the push rod, the protrusions 25 on the sliding sleeves 24 slide synchronously in the sliding grooves 26 within the inner cavity of the circular tube 14, improving assembly stability and guiding accuracy, and ensuring smooth and stable sliding. To prevent deflection or jamming and to limit the vertical travel, the second magnetic strip 22 is embedded in the inner cavity of the groove 23 (the cross-sectional width of the groove 23 is slightly larger than the cross-sectional width of the magnetic strip by 0.1-0.5 mm). This effectively avoids interference between the sliding sleeve 24 and the second magnetic strip 22 during movement, preventing wear. Simultaneously, the grease coating on the surface of the second magnetic strip 22 further reduces frictional resistance, providing corrosion protection and long-term protection. After the material is evenly mixed, the second drive motor 11 is turned off, the third electric push rod 34 retracts, the second gate 35 is pulled out to open the discharge pipe 5, and then the first drive motor 7 is started, driving the fixed shaft 8 to rotate. The mixed material is then discharged through the discharge pipe 5 into the conveying pipe 6 and stably discharged outwards, completing the entire material premixing process.

[0042] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A material premixing mechanism, comprising a mixing tank (1); characterized in that: The mixing tank (1) is equipped with a top cover (2) and a plug (4) at the bottom. A feeding bin (12) is welded to one side of the mixing tank (1), and a feed pipe (3) is installed at the rear of the feeding bin (12). A discharge pipe (5) is welded to the other side of the mixing tank (1) near the bottom. A conveying pipe (6) is fixedly installed at the bottom end of the discharge pipe (5). A load-bearing plate (10) is installed on the top of the top cover (2), and a second drive motor (11) is installed on the top of the load-bearing plate (10). A round pipe is fixedly installed at the end of the power output shaft of the second drive motor (11). 14) Several stirring plates (15) are fixedly installed at equal intervals on the outer periphery of the round tube (14). A connecting rod (16) is rotatably connected to the inner cavity of the round tube (14) near the bottom end through a first bearing. A second spiral blade (17) is fixedly installed on the outer periphery of the connecting rod (16). A fixing rod (20) is provided at the top of the connecting rod (16). Several grooves (23) are opened on the inner cavity sidewall of the round tube (14). A second magnetic strip (22) is fixedly installed on the opposite side of the inner cavity of the groove (23). Several first magnetic strips (21) are fixedly installed on the outer periphery of the fixing rod (20).

2. The material premixing mechanism according to claim 1, characterized in that: A bracket (13) is fixedly installed on the top of the top cover (2). A first electric push rod (18) is fixedly installed on the top of the inner cavity of the bracket (13). A rotating unit is provided between the bottom end of the first electric push rod (18) and the fixed rod (20). A spline strip (27) is fixedly installed on the bottom end of the fixed rod (20). A spline groove (28) is opened on the top of the connecting rod (16), and the spline strip (27) is slidably connected to the inner cavity of the spline groove (28). A speed sensor (30) is provided above the connecting rod (16).

3. A material premixing mechanism according to claim 2, characterized in that: The rotating unit includes a magnetic clutch (19) located between the first electric push rod (18) and the fixed rod (20), with both ends of the magnetic clutch (19) rotatably connected to the ends of the first electric push rod (18) and the fixed rod (20), respectively.

4. A material premixing mechanism according to claim 3, characterized in that: Several of the stirring plates (15) are inclined.

5. A material premixing mechanism according to claim 4, characterized in that: The mixing tank (1) is equipped with several material sensors (29) in its inner cavity. The material sensor (29) located at the bottom is positioned between the final position of the material conveyed by the second spiral blade (17) and the initial position of the material received by the circular tube (14).

6. A material premixing mechanism according to claim 5, characterized in that: The outer periphery of the fixed rod (20) near the top and bottom ends is fitted with a sliding sleeve (24) by a second bearing. Several protrusions (25) are fixedly installed on the outer periphery of the sliding sleeve (24). The inner wall of the round tube (14) is provided with a sliding groove (26). The protrusions (25) are slidably connected to the inner cavity of the adjacent sliding grooves (26).

7. A material premixing mechanism according to claim 1, characterized in that: The cross-sectional width of the groove (23) is 0.1-0.5 mm larger than the cross-sectional width of the second magnetic strip (22).

8. A material premixing mechanism according to claim 6, characterized in that, The controller configuration of the material premixing mechanism includes the following steps: S1: The material distribution at different heights in the mixing tank (1) is monitored in real time by several material sensors (29). Based on the amount and distribution of the mixed materials, the output speed of the second drive motor (11) is controlled, thereby adjusting the speed of the round tube (14) and the stirring plate (15) to make the materials evenly mixed. S2: Based on the material sensor (29) at the bottom layer, the continuity and stability of the material conveying are detected, and the first electric push rod (18) is controlled to drive the fixed rod (20) and the connecting rod (16) to move axially. The area of ​​the first magnetic strip (21) and the second magnetic strip (22) that overlaps is adjusted to change the magnitude of the magnetic transmission, thereby controlling the relative speed between the second spiral blade (17) and the stirring plate (15). S3: By combining the feedback from the speed sensor (30), the magnetic force of the magnetic clutch (19) is adjusted to change the damping of the connecting rod (16) rotation, and the rotation speed range of the second spiral blade (17) is precisely controlled so that the conveying capacity of the second spiral blade (17) matches the mixing capacity of the mixing plate (15), thereby achieving maximum mixing efficiency and avoiding intermittent feeding.

9. A material premixing mechanism according to claim 1, characterized in that: The inner cavity of the feeding bin (12) is movably penetrated by a first gate plate (32), and a second electric push rod (31) is fixedly installed on the outer periphery of the feed pipe (3) near the top. The top end of the second electric push rod (31) is fixedly connected to the first gate plate (32).

10. A material premixing mechanism according to claim 1, characterized in that: A connecting block (33) is fixedly installed on the outer periphery of the mixing tank (1) near the middle position. A third electric push rod (34) is fixedly installed at the bottom of the connecting block (33). A second gate plate (35) is fixedly installed at the bottom end of the third electric push rod (34), and the second gate plate (35) is movably inserted into the inner cavity of the discharge pipe (5).

Images