A feeding device for mixing ultra-high performance concrete

Abstract

The application relates to a feeding device for mixing ultra-high performance concrete, which comprises a mixing box body and a feeding box. A V-shaped material guiding groove is arranged in a bellows at the bottom of the feeding box. A swing mechanism is arranged on one side of the feeding pipe. The V-shaped material guiding groove is driven to make reciprocating swing movement. A first transmission mechanism is arranged between the swing mechanism and the rotating shaft of the stirring part in the mixing box body, so that the swing mechanism is driven to move with the rotation of the stirring part. A dispersing gear disc is rotatably connected below the feeding pipe. A second transmission mechanism is arranged between the swing mechanism and the dispersing gear disc, so that the dispersing gear disc is driven to rotate with the movement of the swing mechanism. The rotation of the dispersing gear disc and the reciprocating swing of the V-shaped material guiding groove are driven during the mixing, the agglomeration and hard block of the powder are forced to be sheared and torn, the material is effectively dispersed, the dispersed material is uniformly distributed on the whole cross section of the mixing box, the wide-area material distribution is realized, and the agglomeration and accumulation problems during the feeding are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of concrete mixing technology, and in particular to a feeding device for ultra-high performance concrete mixing. Background Technology

[0002] Ultra-high performance concrete, due to its excellent mechanical properties and durability, is usually composed of multiple components such as cement, silica fume, quartz sand, high-efficiency water-reducing agent, and steel fiber. It is increasingly widely used in bridge engineering, high-rise buildings, offshore platforms, military protection and other fields.

[0003] In the concrete mixing process, the feeding stage is a key step affecting the uniformity of the final mixture. In existing technologies, the feeding device usually adopts a fixed discharge pipe or a simple chute to directly put various raw materials into the mixer.

[0004] However, the above-mentioned feeding method has the following technical problems: the fixed drop pipe is prone to causing concentrated drop at a single point, resulting in local accumulation. At the same time, ultrafine powders in concrete raw materials are prone to agglomeration, which makes it impossible for the materials to be fully dispersed during the feeding stage and to be evenly distributed in the mixing tank. Based on this, a feeding device for ultra-high performance concrete mixing is proposed. Summary of the Invention

[0005] This invention provides a feeding device for ultra-high performance concrete mixing, which solves the problem mentioned in the above technical background that it is difficult to achieve both dispersion and uniform distribution of materials during the feeding stage, resulting in powder agglomeration and concentrated accumulation at single points due to fixed material discharge pipe.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a feeding device for ultra-high performance concrete mixing, comprising a mixing chamber, a support frame above the mixing chamber, a feeding box fixedly disposed at the top center of the support frame, a discharge pipe fixedly disposed at the bottom of the feeding box, the bottom of the discharge pipe penetrating the support frame and having a V-shaped guide groove, a corrugated pipe disposed between the V-shaped guide groove, a swing mechanism disposed on one side of the support frame for driving the V-shaped guide groove to reciprocate relative to the discharge pipe, a mixing component rotatably connected inside the mixing chamber, a first transmission mechanism disposed between the rotating shaft of the mixing component and the input end of the swing mechanism, the first transmission mechanism transmitting the rotational motion of the mixing component to the swing mechanism and driving the swing mechanism to move with the rotation of the mixing component, a dispersing toothed disc rotatably connected below the discharge pipe, a second transmission mechanism disposed between the output end of the swing mechanism and the dispersing toothed disc, the second transmission mechanism transmitting the motion of the swing mechanism to the dispersing toothed disc and driving the dispersing toothed disc to rotate with the motion of the swing mechanism.

[0007] Preferably, the oscillating mechanism includes a vertical shaft rotatably connected to the outside of the mixing tank body, the vertical shaft having a U-shaped protrusion, a connecting rod rotatably connected to the U-shaped protrusion, and the other end of the connecting rod being hinged to the side wall of the V-shaped guide trough.

[0008] Preferably, baffles are fixedly provided on both sides of the bottom of the support frame, and support rods are fixedly provided on both outer walls of the V-shaped guide trough, with the support rods rotatably connected to the baffles.

[0009] Preferably, the first transmission mechanism includes a first bevel gear fixedly sleeved below the vertical shaft, one end of the rotating shaft of the stirring component passes through the stirring box and is fixedly sleeved with a second bevel gear, the first bevel gear and the second bevel gear are meshed and connected, a drive motor is fixedly installed on one side of the outer wall of the stirring box, and the output shaft of the drive motor is fixedly connected to the other end of the rotating shaft of the stirring component.

[0010] Preferably, the number of teeth of the first bevel gear is greater than the number of teeth of the second bevel gear.

[0011] Preferably, the second transmission mechanism includes a rotating rod rotatably connected to the center of the top of the feeding box via a bearing. The bottom of the rotating rod extends below the feeding pipe and is connected to the dispersing toothed disc. The top of the vertical shaft passes through the support frame and is fixedly fitted with a first transmission wheel. The top of the rotating rod is fixedly fitted with a second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0012] Preferably, the rotating rod is fixedly provided with spiral conveying blades in the lower section inside the feeding pipe, and an acceleration transmission mechanism is provided between the rotating rod and the dispersing toothed disc, so that the rotational speed of the dispersing toothed disc is higher than the rotational speed of the rotating rod.

[0013] Preferably, the speed-increasing transmission mechanism includes a protective cover fixed below the feed pipe by a support rod. The bottom of the rotating rod extends through the protective cover and is fixedly fitted with a third bevel gear. A crossbar is rotatably connected inside the protective cover. A fourth bevel gear is fixedly fitted on one side of the crossbar. The third bevel gear meshes with the fourth bevel gear. A rotating column is fixedly fitted on the top of the dispersing gear disc. The top of the rotating column extends through the protective cover and is fixedly fitted with a fifth bevel gear. A sixth bevel gear is fixedly fitted on the other side of the crossbar. The fifth bevel gear meshes with the sixth bevel gear. The number of teeth of the third bevel gear is greater than the number of teeth of the fourth bevel gear, and the number of teeth of the sixth bevel gear is greater than the number of teeth of the fifth bevel gear.

[0014] Preferably, a rotating seat is fixedly provided on the lower inner wall of the feeding pipe, and the dispersing toothed disc is rotatably connected to the rotating seat. The dispersing toothed disc includes a disc body and a plurality of radial shafts disposed on the disc body, and a plurality of dispersing teeth are uniformly provided on the outer circumferential surface of the radial shafts.

[0015] The beneficial effects of the feeding device for ultra-high performance concrete mixing of the present invention are as follows: (1) This invention drives the high-speed rotation of the dispersing toothed disc in the feed pipe and the swinging of the V-shaped guide groove while the agitator rotates to stir. When the material passes through the dispersing toothed disc, the high-speed rotating radial shaft and its teeth generate strong shearing and tearing action, breaking up the hard agglomerates of powder. This avoids the agglomerated material from directly entering the mixing box. The dispersed material enters the V-shaped guide groove and is evenly distributed across the entire cross-section of the mixing box as the V-shaped guide groove swings back and forth. This avoids local accumulation and gradation segregation caused by concentrated feeding at a single point. The two work together to first forcibly disperse the material and then distribute it evenly. This solves the problem that the material cannot be fully dispersed and cannot be evenly distributed in the mixing box during the feeding stage. It achieves the pretreatment of material dispersion and uniform distribution before stirring and improves the subsequent stirring and mixing effect.

[0016] (2) By setting spiral conveying blades on the section of the rotating rod located in the feeding pipe, the present invention generates a downward thrust on the material in the feeding pipe, and forces the material to the outlet end of the feeding pipe, avoiding the bridging and blockage phenomena common in gravity feeding methods, and ensuring the continuity and stability of the feeding process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the internal connection structure between the feeding box and the discharge pipe of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 5 This is a top view of the dispersion toothed disc structure of the present invention; Figure 6 This is a side view of the structure of the present invention; Figure 7 This is a top view of the structure of the present invention.

[0018] In the diagram: 1. Mixing tank body, 2. Support frame, 3. Feeding box, 4. Discharge pipe, 5. V-shaped guide trough, 6. Corrugated pipe, 7. Mixing component, 8. Dispersing toothed disc, 801. Disc body, 802. Radial shaft, 803. Dispersing tooth, 9. Vertical shaft, 10. U-shaped protrusion, 11. Connecting rod, 12. First bevel gear, 13. Second bevel gear, 14. Drive motor, 15. Rotating rod, 16. First transmission wheel, 17. Second transmission wheel, 18. Transmission belt, 19. Support rod, 20. Protective cover, 21. Third bevel gear, 22. Crossbar, 23. Fourth bevel gear, 24. Rotating column, 25. Fifth bevel gear, 26. Sixth bevel gear, 27. Spiral conveyor blade, 28. Rotating seat, 29. Baffle, 30. Support rod. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-7 As shown, a feeding device for ultra-high performance concrete mixing includes a mixing chamber 1, a support frame 2 mounted on top of the mixing chamber 1, the support frame 2 being U-shaped with its opening facing downwards, and two symmetrically distributed side walls on both sides of the mixing chamber 1. A feeding box 3 is fixedly mounted in the middle of the top of the support frame 2, with a feeding port on one side of the top of the feeding box 3. A discharge pipe 4 is fixedly mounted at the bottom of the feeding box 3, the bottom of the discharge pipe 4 penetrating the support frame 2 and having a V-shaped guide groove 5. Corrugated pipes 6 are provided between the V-shaped guide grooves 5. A swing mechanism is provided on one side of the support frame 2 for driving the V-shaped guide grooves. The trough 5 reciprocates relative to the feed pipe 4. A stirring element 7 is rotatably connected inside the mixing tank 1. A first transmission mechanism is provided between the rotating shaft of the stirring element 7 and the input end of the oscillation mechanism. The first transmission mechanism transmits the rotational motion of the stirring element 7 to the oscillation mechanism and drives the oscillation mechanism to move with the rotation of the stirring element 7. A dispersing toothed disk 8 is rotatably connected below the feed pipe 4. A second transmission mechanism is provided between the output end of the oscillation mechanism and the dispersing toothed disk 8. The second transmission mechanism transmits the motion of the oscillation mechanism to the dispersing toothed disk 8 and drives the dispersing toothed disk 8 to rotate with the motion of the oscillation mechanism.

[0021] refer to Figure 1 The swing mechanism includes a vertical shaft 9 rotatably connected to the outside of the mixing tank 1. A shell is fixedly provided on the outer wall of the mixing tank 1. The bottom of the vertical shaft 9 is rotatably connected to the shell. A U-shaped protrusion 10 is provided on the vertical shaft 9. A connecting rod 11 is rotatably connected to the U-shaped protrusion 10. The other end of the connecting rod 11 is hinged to the side wall of the V-shaped guide trough 5.

[0022] When the vertical shaft 9 rotates, it drives the U-shaped protrusion 10 to make a circular motion. The U-shaped protrusion 10 converts the circular motion into a linear push-pull motion through the connecting rod 11. The other end of the connecting rod is hinged to the side wall of the V-shaped guide trough 5, which drives the V-shaped guide trough 5 to swing back and forth relative to the feed pipe 4, so that the material is evenly distributed in a wide area of ​​the mixing box 1 when feeding.

[0023] refer to Figure 6 The bottom two sides of the support frame 2 are fixed with baffles 29, which are fixed to the bottom two sides of the support frame 2 by bolts. The outer walls of the two sides of the V-shaped guide trough 5 are fixed with support rods 30. The support rods 30 and the baffles 29 are rotatably connected by bearings, providing a reliable swing fulcrum for the V-shaped guide trough 5, so that the V-shaped guide trough 5 can swing back and forth smoothly around the axis of the support rods 30, avoiding shaking or deviation during the swing.

[0024] refer to Figure 1 The first transmission mechanism includes a first bevel gear 12 fixedly sleeved below the vertical shaft 9. One end of the rotating shaft of the stirring component 7 passes through the stirring box 1 and is fixedly sleeved with a second bevel gear 13. The first bevel gear 12 and the second bevel gear 13 are meshed and connected. A drive motor 14 is fixedly installed on one side of the outer wall of the stirring box 1. The output shaft of the drive motor 14 is fixedly connected to the other end of the rotating shaft of the stirring component 7.

[0025] While the drive motor 14 drives the agitator 7 to rotate, the second bevel gear 13 on the shaft of the agitator 7 meshes with the first bevel gear 12 to rotate. The first bevel gear 12 drives the vertical shaft 9 to rotate, which in turn drives the V-shaped guide trough 5 to reciprocate and swing, realizing the mechanical synchronous linkage of uniform material distribution and agitation. Matching the feeding and agitation sequence can not only improve the uniformity of mixing, but also reduce dust and energy consumption.

[0026] The number of teeth of the first bevel gear 12 is greater than the number of teeth of the second bevel gear 13. The ratio of the number of teeth between the two is set to 2:1, so that the rotation speed of the vertical shaft 9 is less than the rotation speed of the agitator 7. This allows the agitator 7 to obtain a certain linear velocity, generating forced convection and shear force to ensure rapid and uniform mixing of materials. It also avoids the excessively fast oscillation frequency of the V-shaped guide channel, which would cause material splashing and segregation. This allows the material to be evenly distributed across the entire cross-section of the mixing tank, eliminating the problems of local accumulation and gradation segregation.

[0027] refer to Figure 2 , Figure 3 and Figure 7The second transmission mechanism includes a rotating rod 15 rotatably connected to the top center of the feeding box 3 via a bearing. The bottom of the rotating rod 15 extends below the feeding pipe 4 and is connected to the dispersing toothed disc 8. The top of the vertical shaft 9 passes through the support frame 2 and is fixedly fitted with a first transmission wheel 16. The top of the rotating rod 15 is fixedly fitted with a second transmission wheel 17. The first transmission wheel 16 and the second transmission wheel 17 are connected by a transmission belt 18, which can be a synchronous belt, a V-belt, or a multi-ribbed belt.

[0028] As the vertical shaft 9 rotates, the rotating rod 15 rotates synchronously under the transmission action of the first transmission wheel 16, the second transmission wheel 17 and the transmission belt 18, thereby driving the lower dispersing toothed disc 8 to rotate, breaking up the clumps in the falling material, preventing them from forming powder balls that are wet on the outside and dry on the inside in the mixing chamber 1, so that the material is pre-loosened by the dispersing toothed disc 8 before entering the mixing chamber 1, so that the material does not need to be dispersed from zero during mixing, and can directly enter the high-efficiency mixing stage, shortening the mixing time.

[0029] refer to Figure 2 The rotating rod 15 is fixedly equipped with a spiral conveying blade 27 in the lower section of the feeding pipe 4. When the rotating rod 15 rotates, the spiral conveying blade 27 rotates accordingly, generating a downward thrust on the material in the feeding pipe 4, forcibly pushing the material to the outlet end of the feeding pipe 4, avoiding arching and blockage of materials such as wet sand and ultrafine powder at the feeding pipe 4, and ensuring the continuity and stability of the feeding process. A speed-increasing transmission mechanism is provided between the rotating rod 15 and the dispersing toothed disc 8, so that the rotation speed of the dispersing toothed disc 8 is higher than that of the rotating rod 15, so that the dispersing toothed disc 8 can generate sufficient shearing force and impact force to break up fiber agglomerates and powder lumps, and improve the dispersion effect.

[0030] refer to Figure 4 The speed-increasing transmission mechanism includes a protective cover 20 fixed below the feed pipe 4 by a support rod 19. The bottom of the rotating rod 15 extends through into the protective cover 20 and is fixedly fitted with a third bevel gear 21. A crossbar 22 is rotatably connected inside the protective cover 20. A fourth bevel gear 23 is fixedly fitted on one side of the crossbar 22. The third bevel gear 21 and the fourth bevel gear 23 are meshed together. A rotating column 24 is fixedly fitted on the top of the dispersing gear disk 8. The top of the rotating column 24 extends through into the protective cover 20 and is fixedly fitted with a fifth bevel gear 25. A sixth bevel gear 26 is fixedly fitted on the other side of the crossbar 22. The fifth bevel gear 25 and the sixth bevel gear 26 are meshed together. The number of teeth of the third bevel gear 21 is greater than the number of teeth of the fourth bevel gear 23, and the number of teeth of the sixth bevel gear 26 is greater than the number of teeth of the fifth bevel gear 25.

[0031] As the rotating rod 15 rotates, the third bevel gear 21 meshes with the fourth bevel gear 23, causing the fourth bevel gear 23 to rotate. The fourth bevel gear 23 drives the crossbar 22 and the sixth bevel gear 26 on the other side to rotate. The sixth bevel gear 26 drives the fifth bevel gear 25 to rotate, which in turn drives the rotating column 24 and the dispersing toothed disc 8 to rotate. By setting the number of teeth of the third bevel gear 21 to be greater than the number of teeth of the fourth bevel gear 23, and the number of teeth of the sixth bevel gear 26 to be greater than the number of teeth of the fifth bevel gear 25, a two-stage speed-increasing transmission is achieved. Ultimately, the rotational speed of the dispersing toothed disc 8 is higher than the rotational speed of the rotating rod 15, allowing the dispersing toothed disc 8 to obtain a higher rotational speed, thereby generating sufficient shearing force to break up fiber clumps and powder lumps, and fully disperse the falling material.

[0032] refer to Figure 4 and Figure 5 A rotating seat 28 is fixedly provided on the lower inner wall of the feed pipe 4. The dispersing toothed disc 8 is rotatably connected to the rotating seat 28. The dispersing toothed disc 8 includes a disc body 801 and multiple radial shafts 802 disposed on the disc body 801. Multiple dispersing teeth 803 are evenly provided on the outer circumferential surface of the radial shafts 802. The number of radial shafts 802 is set to 6, and they are evenly distributed in the disc body 801 to make the mass distribution uniform. No eccentric vibration will be generated when rotating at high speed, ensuring stable operation.

[0033] The radial shaft 802 rotates at high speed with the disc 801. Its outer surface moves relative to the falling material, generating shear force that tears apart clumps in the falling material and breaks up hard powder lumps. Furthermore, gaps are formed between the multiple radial shafts 802, allowing the material to pass through. This ensures that the material is fully dispersed without causing blockage.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A feeding device for ultra-high performance concrete mixing, characterized in that: The device includes a mixing tank, a support frame on top of the mixing tank, a feeding box fixedly located at the top center of the support frame, a discharge pipe fixedly located at the bottom of the feeding box, the discharge pipe penetrating the support frame and having a V-shaped guide groove, a corrugated pipe between the V-shaped guide grooves, and a swing mechanism on one side of the support frame for driving the V-shaped guide grooves to reciprocate relative to the discharge pipe. A mixing element is rotatably connected inside the mixing tank. A first transmission mechanism is provided between the rotating shaft of the mixing element and the input end of the swing mechanism, transmitting the rotational motion of the mixing element to the swing mechanism and driving the swing mechanism to move with the rotation of the mixing element. A dispersing toothed disc is rotatably connected below the discharge pipe, and a second transmission mechanism is provided between the output end of the swing mechanism and the dispersing toothed disc, transmitting the motion of the swing mechanism to the dispersing toothed disc and driving the dispersing toothed disc to rotate with the motion of the swing mechanism.

2. The feeding device for ultra-high performance concrete mixing according to claim 1, characterized in that: The swing mechanism includes a vertical shaft rotatably connected to the outside of the mixing tank. The vertical shaft is provided with a U-shaped protrusion, and a connecting rod is rotatably connected to the U-shaped protrusion. The other end of the connecting rod is hinged to the side wall of the V-shaped guide trough.

3. The feeding device for ultra-high performance concrete mixing according to claim 2, characterized in that: The bottom two sides of the support frame are fixedly provided with baffles, and the outer walls of the two sides of the V-shaped guide trough are fixedly provided with support rods, which are rotatably connected to the baffles.

4. The feeding device for ultra-high performance concrete mixing according to claim 2, characterized in that: The first transmission mechanism includes a first bevel gear fixedly sleeved below the vertical shaft. One end of the rotating shaft of the stirring component passes through the stirring box and is fixedly sleeved with a second bevel gear. The first bevel gear and the second bevel gear are meshed and connected. A drive motor is fixedly installed on one side of the outer wall of the stirring box. The output shaft of the drive motor is fixedly connected to the other end of the rotating shaft of the stirring component.

5. The feeding device for ultra-high performance concrete mixing according to claim 4, characterized in that: The number of teeth of the first bevel gear is greater than the number of teeth of the second bevel gear.

6. The feeding device for ultra-high performance concrete mixing according to claim 4, characterized in that: The second transmission mechanism includes a rotating rod rotatably connected to the center of the top of the feeding box via a bearing. The bottom of the rotating rod extends below the feeding pipe and is connected to the dispersing toothed disc. The top of the vertical shaft passes through the support frame and is fixedly fitted with a first transmission wheel. The top of the rotating rod is fixedly fitted with a second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a transmission belt.

7. The feeding device for ultra-high performance concrete mixing according to claim 6, characterized in that: The rotating rod is fixedly equipped with spiral conveying blades in the lower section of the feeding pipe. An acceleration transmission mechanism is provided between the rotating rod and the dispersing toothed disc, so that the rotational speed of the dispersing toothed disc is higher than the rotational speed of the rotating rod.

8. The feeding device for ultra-high performance concrete mixing according to claim 7, characterized in that: The speed-increasing transmission mechanism includes a protective cover fixed below the feed pipe by a support rod. The bottom of the rotating rod extends through the protective cover and is fixedly fitted with a third bevel gear. A crossbar is rotatably connected inside the protective cover. A fourth bevel gear is fixedly fitted on one side of the crossbar. The third bevel gear meshes with the fourth bevel gear. A rotating column is fixedly fitted on the top of the dispersing gear disc. The top of the rotating column extends through the protective cover and is fixedly fitted with a fifth bevel gear. A sixth bevel gear is fixedly fitted on the other side of the crossbar. The fifth bevel gear meshes with the sixth bevel gear. The number of teeth on the third bevel gear is greater than the number of teeth on the fourth bevel gear, and the number of teeth on the sixth bevel gear is greater than the number of teeth on the fifth bevel gear.

9. The feeding device for ultra-high performance concrete mixing according to claim 1, characterized in that: A rotating seat is fixedly provided on the lower inner wall of the feeding pipe. The dispersing toothed disc is rotatably connected to the rotating seat. The dispersing toothed disc includes a disc body and multiple radial shafts disposed on the disc body. Multiple dispersing teeth are uniformly provided on the outer circumferential surface of the radial shafts.

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