A quantitative mixing device for polypropylene fiber reinforced concrete

Abstract

This application belongs to the field of mixing device technology and discloses a quantitative mixing device for polypropylene fiber concrete. It includes a mixing box, support legs fixed to the bottom of the mixing box, and a feeding pipe fixed and connected to the top of the mixing box. The mixing box is equipped with a discharge assembly and a conveying mechanism. A vertical pipe rotatably connected to the top of the mixing box is installed through the top of the mixing box. A stirring rod coaxially mounted on the bottom of the vertical pipe is rotatably mounted thereon. The top of the stirring rod and the bottom of the vertical pipe are sealed by a rotating shaft seal. Inclined stirring blades are fixed to the side walls of both the vertical pipe and the stirring rod. A driving mechanism is provided on the mixing box. This application, by setting up the vertical pipe, stirring rod, stirring blades, and driving mechanism, allows the upper layer of concrete and polypropylene fibers to descend while the lower layer of concrete rises, shortening the descent distance of the polypropylene fibers and improving the mixing efficiency of the polypropylene fibers and concrete.

Description

Technical Field

[0001] This utility model relates to the field of mixing device technology, and in particular to a quantitative mixing device for polypropylene fiber concrete. Background Technology

[0002] Polypropylene fibers are typically added during concrete mixing to improve the concrete's crack resistance, impermeability, and durability. However, excessive or insufficient addition of polypropylene fibers can affect their effectiveness. If the amount of polypropylene fibers is too low, their distribution in the concrete will be uneven, failing to fully exert their reinforcing effect. If the amount of polypropylene fibers is too high, it may lead to a decrease in the workability of the concrete, affecting construction and molding. Therefore, concrete and polypropylene fibers need to be mixed in a precise amount.

[0003] Chinese utility model patent CN217648662U discloses a quantitative mixing device for polypropylene fiber concrete, including a mixing tank with multiple quantitative devices, each including a weighing box with an electronic scale at the bottom. The mixing tank is equipped with a stirring device, which includes a stirring motor mounted on the outer wall of the mixing tank.

[0004] In the process of mixing concrete and polypropylene fiber, the above-mentioned mixing device needs to mix the polypropylene fiber in the upper layer to the concrete in order to mix the concrete and polypropylene fiber more evenly. However, this mixing method takes a long time and is not conducive to improving the mixing speed of concrete and polypropylene fiber. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a quantitative mixing device for polypropylene fiber concrete.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quantitative mixing device for polypropylene fiber concrete, comprising a mixing box, a support leg fixed to the bottom of the mixing box, and an injection pipe fixed and connected to the top of the mixing box. The mixing box is provided with a discharge assembly for discharging the mixed concrete in the mixing box and a conveying mechanism for quantitatively injecting polypropylene fibers into the mixing box. A vertical pipe rotatably connected to the top of the mixing box is provided through the top of the mixing box. A stirring rod coaxially arranged with the vertical pipe is rotatably installed at the bottom of the vertical pipe. The top of the stirring rod and the bottom of the vertical pipe are sealed by a rotating shaft seal. An inclined stirring blade is fixed on the side wall of both the vertical pipe and the stirring rod. The mixing box is provided with a driving mechanism that drives the vertical pipe and the stirring rod to rotate in opposite directions simultaneously.

[0007] By adopting the above technical solution, in the process of mixing polypropylene fibers with concrete, concrete is first injected into the mixing box through the injection pipe, and then the required amount of polypropylene fibers is injected into the mixing box through the conveying mechanism. Then, the driving mechanism drives the vertical pipe and the mixing rod to rotate in opposite directions at the same time. Both sets of mixing blades rotate in opposite directions at the same time. In this way, the mixing blades on the vertical pipe cause the upper layer of concrete and polypropylene fibers to fall, while the mixing blades on the mixing rod cause the lower layer of concrete to rise, shortening the distance that the polypropylene fibers fall and improving the mixing efficiency of polypropylene fibers and concrete.

[0008] Furthermore, the driving mechanism includes a driving assembly, which includes a driving motor fixed to the top mounting plate of the mixing tank, a transmission rod rotatably mounted inside the vertical pipe and coaxially arranged with the vertical pipe, a driven sprocket fixedly sleeved on the transmission rod, a main driving sprocket fixedly sleeved on the output end of the driving motor, a driving chain meshing with both the driven sprocket and the main driving sprocket, a driven gear fixedly sleeved on the vertical pipe, and a main driving gear fixedly sleeved on the output end of the driving motor and meshing with the driven gear. The bottom of the transmission rod is fixed to the top of the mixing rod. The driving mechanism also includes a mixing assembly for tumbling the concrete and polypropylene fibers.

[0009] By adopting the above technical solution, after the drive motor starts working, it drives the main drive sprocket to rotate. Since the drive chain meshes with both the driven sprocket and the main drive sprocket, and the transmission rod is rotatably installed inside the vertical pipe with its bottom fixed to the top of the mixing rod, the mixing rod, driven sprocket, drive chain, and transmission rod all rotate. This achieves the purpose of rotating the mixing blades on the mixing rod and mixing the lower layer of concrete. After the drive motor starts working, it drives the main drive gear to rotate, causing the driven gear meshing with the main drive gear, the vertical pipe fixed to the driven gear, and the mixing blades fixed to the vertical pipe to rotate, thereby achieving the purpose of mixing the upper layer of concrete.

[0010] Furthermore, the stirring assembly includes a mounting box fixedly sleeved on the vertical pipe, an active rod that passes through and is rotatably connected to the side wall of the vertical pipe, the active rod passing through and being rotatably connected to the side wall of the mounting box, and the side wall of the active rod and the side wall of the mounting box being sealed by a rotating shaft seal. The stirring assembly also includes a stirring blade fixed to the end of the active rod away from the mounting box, an active bevel gear fixedly sleeved on the transmission rod, and a driven bevel gear fixedly sleeved on the active rod and meshing with the active bevel gear.

[0011] By adopting the above technical solution, during the rotation of the transmission rod, the driving bevel gear fixed to the transmission rod, the driven bevel gear meshing with the driving bevel gear, the driving rod fixed to the driven bevel gear, and the stirring blade fixed to the driving rod all rotate along the axis of the driving rod. The stirring blade on the driving rod stirs the upper layer of concrete up and down, thereby increasing the mixing speed of concrete and polypropylene fiber.

[0012] Furthermore, the stirring rod passes through the bottom of the mounting box and is rotatably connected. The side wall of the stirring rod is sealed to the bottom of the mounting box by a rotary shaft seal. The stirring assembly also includes a driven rod that passes through the side wall of the mounting box and is rotatably connected, a main tumbling sprocket fixedly sleeved on the driving rod, a secondary tumbling sprocket fixedly sleeved on the driven rod, and a tumbling chain for connecting the main tumbling sprocket and the secondary tumbling sprocket. Both the secondary tumbling sprocket and the main tumbling sprocket mesh with the tumbling chain. A tumbling blade is also fixed to the end of the driven rod away from the mounting box. The side wall of the driven rod is sealed to the side wall of the mounting box by a rotary shaft seal.

[0013] By adopting the above technical solution, during the rotation of the driving rod, since the main tumbling sprocket is fixedly sleeved on the driving rod and the driven tumbling sprocket is fixedly sleeved on the driven rod, both the driven tumbling sprocket and the main tumbling sprocket mesh with the tumbling chain, the tumbling blades fixed on the driven rod rotate along the axis of the driven rod. The tumbling blades stir the lower layer of concrete up and down, which improves the mixing speed of concrete and polypropylene fiber.

[0014] Furthermore, the feeding mechanism includes a measuring component, which includes a feed pipe fixed to and connected to the top of the mixing tank, an electronic scale rotatably installed inside the feed pipe, and a crossbar that passes through and is rotatably connected to the side wall of the feed pipe. The crossbar is fixed to the electronic scale. The measuring component also includes a driven flip gear fixedly sleeved on the crossbar, a flip motor fixedly sleeved on the feed pipe, and a main flip gear fixedly sleeved on the output end of the flip motor and meshing with the driven flip gear. The feeding mechanism also includes a feeding component for discharging polypropylene fibers into the feed pipe.

[0015] By adopting the above technical solution, during the process of injecting polypropylene fibers into the mixing tank, the polypropylene fibers are first discharged into the feed pipe by the feeding component and positioned at the top of the electronic scale. The electronic scale weighs the polypropylene fibers. When the weight of the polypropylene fibers reaches the required amount, the feeding component stops injecting polypropylene fibers into the feed pipe. At this time, the flipping motor works and drives the main flipping gear to rotate, causing the driven flipping gear meshing with the main flipping gear, the crossbar connected to the driven flipping gear, and the electronic scale fixed to the crossbar to all rotate 90 degrees. During this process, the polypropylene fibers will fall into the mixing tank and mix with the concrete, thereby achieving the purpose of quantitatively injecting polypropylene fibers.

[0016] Furthermore, the feeding assembly includes a mounting frame fixed to the top of the mixing tank, a storage tank fixed to the top of the mounting frame and located above the feed pipe, a vertical rod rotatably mounted on the inner top wall of the mounting frame, a feeding motor fixed to the top of the mounting frame and driving the vertical rod to rotate, and a discharge pipe fixed and connected to the bottom of the mounting frame. The vertical rod extends into the discharge pipe. The feeding assembly also includes a spiral plate fixedly sleeved on the vertical rod and located in the discharge pipe. A solenoid valve located below the spiral plate is provided on the discharge pipe.

[0017] By adopting the above technical solution, during the process of injecting polypropylene fibers into the feed pipe, the solenoid valve is first opened, and then the feeding motor drives the vertical rod to rotate, which causes the discharge pipe connected to the vertical rod to rotate. The discharge pipe can evenly discharge the polypropylene fibers in the storage tank, and at the same time, it can reduce the probability of polypropylene fibers clogging the discharge pipe.

[0018] Furthermore, the discharge assembly includes a discharge pipe fixed to and connected to the bottom of the mixing tank, a valve core rotatably installed inside the discharge pipe near the top of the discharge pipe, and a discharge motor fixed to the discharge pipe and driving the valve core to rotate. The top of the valve core is provided with a discharge through hole.

[0019] By adopting the above technical solution, the discharge motor operates and drives the valve core to rotate 90 degrees. At this time, the inner wall of the discharge pipe blocks the discharge through-hole, allowing concrete and polypropylene fibers to be discharged into the mixing tank. After the concrete and polypropylene fibers are mixed, the discharge motor operates again and drives the valve core to rotate 90 degrees, at which point the concrete and polypropylene fiber mixture will be discharged from the mixing tank through the discharge through-hole.

[0020] In summary, the present invention has the following beneficial effects: In this application, by setting up a vertical pipe, a stirring rod, a stirring blade and a driving mechanism, the upper layer of concrete and polypropylene fibers descend while the lower layer of concrete rises, which shortens the descent distance of the polypropylene fibers and improves the mixing efficiency of polypropylene fibers and concrete. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 A cross-sectional view of the structure after removing the supporting legs;

[0023] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention used to highlight the material conveying mechanism;

[0024] Figure 4 yes Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 yes Figure 2 Enlarged diagram of point B in the middle.

[0026] In the diagram: 1. Mixing tank; 2. Injection pipe; 3. Discharge assembly; 31. Discharge pipe; 32. Valve core; 33. Discharge motor; 4. Conveying mechanism; 41. Measuring assembly; 411. Feed pipe; 412. Electronic scale; 413. Crossbar; 414. Sub-rotating gear; 415. Rotating motor; 416. Main rotating gear; 42. Feeding assembly; 421. Mounting bracket; 422. Storage tank; 423. Vertical rod; 424. Feeding motor; 425. Discharge pipe; 426. Spiral plate; 5. Vertical pipe; 6. Stirring rod; 7. Agitator 8. Mixing blade; 8. Drive mechanism; 81. Drive assembly; 811. Mounting plate; 812. Drive motor; 813. Transmission rod; 814. Driven sprocket; 815. Main drive sprocket; 816. Drive chain; 817. Driven gear; 818. Main drive gear; 82. Mixing assembly; 821. Mounting box; 822. Drive rod; 823. Tumbling blade; 824. Driven bevel gear; 825. Driven bevel gear; 826. Driven rod; 827. Main tumbling sprocket; 828. Driven tumbling sprocket; 829. Tumbling chain. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figure 1-5 As shown in the embodiment of this application, a quantitative mixing device for polypropylene fiber concrete is disclosed, including a mixing box 1, a discharge assembly 3, a conveying mechanism 4, and a driving mechanism 8. Multiple support legs evenly distributed about the axis of the mixing box 1 are fixed to the bottom of the mixing box 1. A material injection pipe 2 is fixed to and connected to the top of the mixing box 1. A vertical pipe 5, rotatably connected to the top of the mixing box 1, is installed through the top of the vertical pipe 5. A stirring rod 6, coaxially arranged with the vertical pipe 5, is rotatably mounted at the bottom of the vertical pipe 5. The top of the stirring rod 6 and the bottom of the vertical pipe 5 are sealed by a rotating shaft seal. Inclined stirring blades 7 are fixed to the side walls of both the vertical pipe 5 and the stirring rod 6.

[0029] The discharge assembly 3 is installed on the mixing tank 1 and is used to discharge the mixed concrete from the mixing tank 1. The discharge assembly 3 includes a discharge pipe 31, a valve core 32, and a discharge motor 33. The discharge pipe 31 is fixed to and connected to the bottom of the mixing tank 1. The valve core 32 is rotatably installed inside the discharge pipe 31 near the top of the discharge pipe 31. A discharge through hole is provided through the top of the valve core 32. The discharge motor 33 is fixed to the discharge pipe 31 and drives the valve core 32 to rotate.

[0030] A feeding mechanism 4 is mounted on the mixing chamber 1 and is used to quantitatively inject polypropylene fibers into the mixing chamber 1. The feeding mechanism 4 includes a measuring component 41 and a measuring assembly 42. The measuring assembly 41 includes a feed pipe 411, an electronic scale 412, a crossbar 413, a driven gear 414, a rotating motor 415, and a main rotating gear 416. The feed pipe 411 is fixed to and communicates with the top of the mixing chamber 1, and the electronic scale 412 is rotatably mounted inside the feed pipe 411. The crossbar 413 is inserted through the side wall of the feed pipe 411 and rotates, and is fixed to the electronic scale 412. The driven gear 414 is fixedly sleeved on the crossbar 413, the rotating motor 415 is fixed to the feed pipe 411, and the main rotating gear 416 is fixedly sleeved on the output end of the rotating motor 415 and meshes with the driven gear 414.

[0031] During the mixing of polypropylene fiber and concrete, the discharge motor 33 first operates and drives the valve core 32 to rotate 90 degrees. At this time, the inner wall of the discharge pipe 31 blocks the discharge through-hole. Then, concrete is injected into the mixing box 1 through the injection pipe 2. Next, the polypropylene fiber is discharged into the feed pipe 411 through the feeding assembly 42 and positioned at the top of the electronic scale 412. The electronic scale 412 weighs the polypropylene fiber. When the weight of the polypropylene fiber reaches the required amount, the feeding assembly 42 stops injecting polypropylene fiber into the feed pipe 411. At this time, the tilting motor 415 operates and drives the main tilting gear 416 to rotate, so that it rotates with the main tilting gear. The driven gear 414, which meshes with the rotating gear 416, the crossbar 413 connected to the driven gear 414, and the electronic scale 412 fixed to the crossbar 413 all rotate 90 degrees. During this process, the polypropylene fibers fall into the mixing box 1 and mix with the concrete. Then, the drive mechanism 8 drives the vertical pipe 5 and the stirring rod 6 to rotate in opposite directions simultaneously, and the two sets of stirring blades 7 also rotate in opposite directions simultaneously. In this way, the stirring blades 7 on the vertical pipe 5 cause the upper layer of concrete and polypropylene fibers to fall, while the stirring blades 7 on the stirring rod 6 cause the lower layer of concrete to rise, shortening the distance the polypropylene fibers fall and improving the mixing efficiency of polypropylene fibers and concrete. After the polypropylene fibers and concrete are mixed, the discharge motor 33 works and drives the valve core 32 to rotate 90 degrees. At this time, the mixture of concrete and polypropylene fibers will be discharged from the mixing box 1 through the discharge hole.

[0032] The feeding assembly 42 is used to discharge polypropylene fibers into the feed pipe 411. The feeding assembly 42 includes a mounting frame 421, a storage tank 422, a vertical rod 423, a feeding motor 424, a discharge pipe 425, and a spiral plate 426. The mounting frame 421 is fixed to the top of the mixing tank 1, and the storage tank 422 is fixed to the top of the mounting frame 421 and located above the feed pipe 411. The vertical rod 423 is rotatably mounted on the inner top wall of the mounting frame 421 and extends into the discharge pipe 425. The feeding motor 424 is fixed to the top of the mounting frame 421 and drives the vertical rod 423 to rotate. The discharge pipe 425 is fixed and connected to the bottom of the mounting frame 421. The spiral plate 426 is fixedly sleeved on the vertical rod 423 and located inside the discharge pipe 425. A solenoid valve located below the spiral plate 426 is provided on the discharge pipe 425.

[0033] During the process of injecting polypropylene fibers into the feed pipe 411, the solenoid valve is first opened, and then the feed motor 424 works to drive the vertical rod 423 to rotate, which causes the discharge pipe 425 connected to the vertical rod 423 to rotate. The discharge pipe 425 can evenly discharge the polypropylene fibers in the storage tank 422, and at the same time, it can reduce the probability of polypropylene fibers clogging the discharge pipe 425.

[0034] A drive mechanism 8 is mounted on the mixing chamber 1. The drive mechanism 8 drives the vertical tube 5 and the stirring rod 6 to rotate simultaneously in opposite directions. The drive mechanism 8 includes a drive assembly 81 and a stirring assembly 82. The drive assembly 81 includes a mounting plate 811, a drive motor 812, a transmission rod 813, a driven sprocket 814, a main drive sprocket 815, a drive chain 816, a driven gear 817, and a main drive gear 818. The mounting plate 811 is fixed to the top of the mixing chamber 1, and the drive motor 812 is fixed to the mounting plate 811. The transmission rod 813 is rotatably mounted inside the vertical tube 5 and coaxially arranged with the vertical tube 5. The bottom of the transmission rod 813 is fixed to the top of the stirring rod 6. The driven sprocket 814 is fixedly sleeved on the transmission rod 813. The main drive sprocket 815 is fixedly sleeved on the output end of the drive motor 812. The drive chain 816 meshes with both the driven sprocket 814 and the main drive sprocket 815. The driven gear 817 is fixedly sleeved on the vertical tube 5, and the main driven gear 818 is fixedly sleeved on the output end of the drive motor 812 and meshes with the driven gear 817.

[0035] After the drive motor 812 starts working, it drives the main drive sprocket 815 to rotate. Since the drive chain 816 meshes with both the driven sprocket 814 and the main drive sprocket 815, and the transmission rod 813 is rotatably installed inside the vertical pipe 5, with its bottom fixed to the top of the mixing rod 6, the mixing rod 6, the driven sprocket 814, the drive chain 816, and the transmission rod 813 all rotate. This allows the mixing blade 7 on the mixing rod 6 to rotate and mix the lower layer of concrete. After the drive motor 812 starts working, it drives the main drive gear 818 to rotate, causing the driven gear 817 meshing with the main drive gear 818, the vertical pipe 5 fixed to the driven gear 817, and the mixing blade 7 fixed to the vertical pipe 5 to rotate, thereby achieving the purpose of mixing the upper layer of concrete.

[0036] The mixing assembly 82 is used to mix concrete and polypropylene fibers. The mixing assembly 82 includes a mounting box 821, a drive rod 822, a stirring blade 823, a drive bevel gear 824, a driven bevel gear 825, a driven rod 826, a main stirring sprocket 827, a secondary stirring sprocket 828, and a stirring chain 829. The mounting box 821 is fixedly fitted onto the vertical pipe 5. The mixing rod 6 passes through the bottom of the mounting box 821 and is rotatably connected to the drive rod 822, which passes through and is rotatably connected to the side wall of the vertical pipe 5. The side wall of the mixing rod 6 is sealed to the bottom of the mounting box 821 by a rotary shaft seal. The drive rod 822 passes through the side wall of the mounting box 821 and is rotatably connected to it. The side wall of the drive rod 822 is sealed to the side wall of the mounting box 821 by a rotary shaft seal. The stirring blade 823 is fixed to the end of the drive rod 822 away from the mounting box 821. The drive bevel gear 824 is fixedly sleeved on the transmission rod 813. The driven bevel gear 825 is fixedly sleeved on the drive rod 822 and meshes with the drive bevel gear 824.

[0037] Driven rod 826 is rotatably connected to the side wall of mounting box 821, and a stirring blade 823 is fixed to the end of driven rod 826 away from mounting box 821. The side wall of driven rod 826 and the side wall of mounting box 821 are sealed by a rotary shaft seal. Main stirring sprocket 827 is fixedly sleeved on drive rod 822. Driven stirring sprocket 828 is fixedly sleeved on driven rod 826. Stirring chain 829 is used to connect main stirring sprocket 827 and driven stirring sprocket 828. Both driven stirring sprocket 828 and main stirring sprocket 827 mesh with stirring chain 829.

[0038] During the rotation of the transmission rod 813, the driving bevel gear 824 fixed to the transmission rod 813, the driven bevel gear 825 meshing with the driving bevel gear 824, the driving rod 822 fixed to the driven bevel gear 825, and the tumbling blade 823 fixed to the driving rod 822 all rotate along the axis of the driving rod 822. The tumbling blade 823 on the driving rod 822 tumbles the upper layer of concrete up and down. At the same time, during the rotation of the driving rod 822, since the main tumbling sprocket 827 is fixedly sleeved on the driving rod 822 and the driven tumbling sprocket 828 is fixedly sleeved on the driven rod 826, and both the driven tumbling sprocket 828 and the main tumbling sprocket 827 mesh with the tumbling chain 829, the tumbling blade 823 fixed on the driven rod 826 rotates along the axis of the driven rod 826. The tumbling blade 823 tumbles the lower layer of concrete up and down, increasing the mixing speed of the concrete and polypropylene fibers.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A quantitative mixing device for polypropylene fiber concrete, comprising a mixing box (1), a support leg fixed to the bottom of the mixing box (1), and an injection pipe (2) fixed to and connected to the top of the mixing box (1), wherein the mixing box (1) is provided with a discharge assembly (3) for discharging the mixed concrete in the mixing box (1) and a conveying mechanism (4) for quantitatively injecting polypropylene fibers into the mixing box (1), characterized in that: The top of the mixing tank (1) is provided with a vertical tube (5) that is rotatably connected to the top of the mixing tank (1). The bottom of the vertical tube (5) is rotatably mounted with a stirring rod (6) that is coaxial with the vertical tube (5). The top of the stirring rod (6) and the bottom of the vertical tube (5) are sealed by a rotating shaft seal. The side walls of the vertical tube (5) and the stirring rod (6) are both fixed with stirring blades (7) that are arranged in an inclined state. The mixing tank (1) is provided with a drive mechanism (8) for driving the vertical tube (5) and the stirring rod (6) to rotate in opposite directions at the same time.

2. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 1, characterized in that: The drive mechanism (8) includes a drive assembly (81), which includes a drive motor (812) fixed to the top mounting plate (811) of the mixing tank (1), a drive motor (812) fixed to the mounting plate (811), a transmission rod (813) rotatably mounted inside the vertical pipe (5) and coaxially arranged with the vertical pipe (5), a driven sprocket (814) fixedly sleeved on the transmission rod (813), a main drive sprocket (815) fixedly sleeved on the output end of the drive motor (812), and a drive sprocket (814) and a drive sprocket (815). The drive chain (816) meshes with both the drive sprocket (814) and the main drive sprocket (815), the driven gear (817) is fixedly sleeved on the vertical pipe (5), and the main drive gear (818) is fixedly sleeved on the output end of the drive motor (812) and meshes with the driven gear (817). The bottom of the transmission rod (813) is fixed to the top of the stirring rod (6). The drive mechanism (8) also includes a stirring assembly (82) for tumbling concrete and polypropylene fibers.

3. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 2, characterized in that: The stirring assembly (82) includes a mounting box (821) fixedly sleeved on the vertical pipe (5), and an active rod (822) that is rotatably connected to the side wall of the vertical pipe (5). The active rod (822) passes through the side wall of the mounting box (821) and is rotatably connected. The side wall of the active rod (822) and the side wall of the mounting box (821) are sealed by a rotating shaft seal. The stirring assembly (82) also includes a stirring blade (823) fixed to the end of the active rod (822) away from the mounting box (821), an active bevel gear (824) fixedly sleeved on the transmission rod (813), and a driven bevel gear (825) fixedly sleeved on the active rod (822) and meshing with the active bevel gear (824).

4. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 3, characterized in that: The stirring rod (6) passes through the bottom of the mounting box (821) and is rotatably connected. The side wall of the stirring rod (6) and the bottom of the mounting box (821) are sealed by a rotating shaft seal. The stirring assembly (82) also includes a driven rod (826) that passes through the side wall of the mounting box (821) and is rotatably connected, a main stirring sprocket (827) that is fixedly sleeved on the driving rod (822), and a secondary stirring sprocket that is fixedly sleeved on the driven rod (826). (828) and a stirring chain (829) for connecting the main stirring sprocket (827) and the driven stirring sprocket (828), both the driven stirring sprocket (828) and the main stirring sprocket (827) meshing with the stirring chain (829), and a stirring blade (823) fixed at one end of the driven rod (826) away from the mounting box (821), and the side wall of the driven rod (826) and the side wall of the mounting box (821) are kept sealed by a rotating shaft seal.

5. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 1, characterized in that: The feeding mechanism (4) includes a measuring component (41), which includes a feed pipe (411) fixed to and connected to the top of the mixing tank (1), an electronic scale (412) rotatably installed in the feed pipe (411), and a crossbar (413) that passes through and is rotatably connected to the side wall of the feed pipe (411). The crossbar (413) is fixed to the electronic scale (412). The measuring component (41) also includes a driven reversing gear (414) fixedly sleeved on the crossbar (413), a reversing motor (415) fixedly sleeved on the feed pipe (411), and a main reversing gear (416) fixedly sleeved on the output end of the reversing motor (415) and meshing with the driven reversing gear (414). The feeding mechanism (4) also includes a feeding component (42) for discharging polypropylene fibers into the feed pipe (411).

6. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 5, characterized in that: The feeding assembly (42) includes a mounting bracket (421) fixed to the top of the mixing box (1), a storage tank (422) fixed to the top of the mounting bracket (421) and located above the feed pipe (411), a vertical rod (423) rotatably mounted on the inner top wall of the mounting bracket (421), a feeding motor (424) fixed to the top of the mounting bracket (421) and driving the vertical rod (423) to rotate, and a discharge pipe (425) fixed and connected to the bottom of the mounting bracket (421). The vertical rod (423) extends into the discharge pipe (425). The feeding assembly (42) also includes a spiral plate (426) fixedly sleeved on the vertical rod (423) and located in the discharge pipe (425). A solenoid valve located below the spiral plate (426) is provided on the discharge pipe (425).

7. The quantitative mixing device for polypropylene fiber reinforced concrete according to claim 1, characterized in that: The discharge assembly (3) includes a discharge pipe (31) fixed to and connected to the bottom of the mixing box (1), a valve core (32) rotatably installed inside the discharge pipe (31) near the top of the discharge pipe (31), and a discharge motor (33) fixed to the discharge pipe (31) and driving the valve core (32) to rotate. The top of the valve core (32) is provided with a discharge through hole.

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