Recycled concrete waste refining and crushing mechanism

Abstract

The application discloses a recycled concrete waste refining and crushing mechanism and belongs to the technical field of construction waste treatment. The mechanism comprises a crushing assembly, a grinding assembly and a screening assembly, all the moving parts are driven by a single grinding motor, the crushing assembly realizes pre-crushing of large concrete blocks through paired crushing wheels, after the material is sent into the grinding box, the material is refined in depth by means of extrusion and shearing of the grinding main roller and the grinding auxiliary roller, the material circulation and regrinding and the self-cleaning of the box wall are realized by cooperating with the rotary screening cylinder provided with a stirring plate and a scraper, the net screen plate at the bottom of the grinding box can vibrate in high frequency, coarse particles are intercepted and regrinding, qualified material falls into the screening assembly below, the screening assembly drives the coarse and fine screening discs to reciprocate by a sector gear and a screening spring, and the coarse and fine recycled aggregates are automatically discharged by synchronous linkage of the stepped discharge plate.

Description

Technical Field

[0001] This invention belongs to the field of construction waste treatment technology, specifically referring to a mechanism for refining and crushing recycled concrete waste. Background Technology

[0002] Urban demolition and infrastructure construction generate a large amount of waste concrete. Random dumping and landfilling can easily lead to land occupation and water and soil pollution. At the same time, the mining of natural sand and gravel is restricted. Processing concrete waste into recycled aggregate is the mainstream solution for the resource utilization of construction waste.

[0003] Existing crushing equipment has significant drawbacks: the coarse crushing, grinding, and screening equipment are arranged separately, driven by multiple motors, resulting in large equipment footprints, high energy consumption, and high supporting costs; the operation of each mechanism is not synchronized, leading to poor production stability; most are single-stage crushing without a circulating re-grinding structure, resulting in uneven aggregate particle size and difficulty in meeting the standards for high-quality recycled building materials; cement powder easily adheres to the box wall, caking and clogging, and the screen lacks a self-vibrating anti-clogging structure, requiring frequent shutdowns for manual cleaning; exposed gears are prone to dust ingress and wear, resulting in poor continuous operation capability; only simple single-stage screening cannot automatically separate coarse and fine aggregates, requiring additional screening equipment, making the process cumbersome; and there are many open material transfer openings, leading to serious dust pollution. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a refining and crushing mechanism for recycled concrete waste, which effectively solves the above problems.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a refining and crushing mechanism for recycled concrete waste, including a crushing component, a grinding component, and a screening component. The grinding component is disposed on the screening component, and the crushing component is disposed on the grinding component. The grinding component includes a grinding box, a main grinding roller, a secondary grinding roller, a grinding motor, and a screening cylinder. The main grinding roller rotates at the center of the grinding box, the secondary grinding roller is horizontally arranged on one side of the main grinding roller and rotates inside the grinding box, the grinding motor is disposed on the main grinding roller, and the screening cylinder rotates inside the grinding box.

[0006] Furthermore, the crushing assembly includes a crushing box, crushing wheels, crushing gears, and a gear drive wheel. The crushing box has a feed inlet at the top and a discharge outlet at the bottom. Crushing wheels are symmetrically arranged at the discharge outlet. The crushing gears are located at both ends of the crushing wheels, and the gear drive wheel is located at one end of one of the crushing wheels. The crushing gears and the gear drive wheel are meshed together. The grinding box has a feed inlet at the top and a discharge outlet at the bottom. The discharge outlet is located above the feed inlet.

[0007] Preferably, the crushing wheel and gears work together to drive the crushing in opposite directions, which can quickly pre-crush large pieces of concrete; the crushing box is directly connected to the grinding box, so the material is transported without dead corners and with less dust, and no separate motor is required, which simplifies the power configuration of the whole machine.

[0008] Furthermore, the main grinding roller is provided with main roller gears at both ends, the auxiliary grinding roller is provided with auxiliary roller gears at both ends, and an auxiliary roller drive wheel is provided on the outside of the auxiliary roller gear. The main roller gear and the auxiliary roller gear are meshed and connected. The output shaft of the grinding motor is fixed on the main roller gear, and a motor drive wheel is provided on the output shaft of the grinding motor. The motor drive wheel and the gear drive wheel are connected by a transmission belt.

[0009] Furthermore, the screen cylinder is provided with a circular array of mixing plates, a gear ring is provided on one side of the screen cylinder, a sealed plate groove is provided on the inner wall of the gear ring, and the screen cylinder is also provided with scrapers. Three scrapers are arranged in a circular array on the mixing plate of the screen cylinder, and the outer wall of the scrapers is attached to the inner wall of the grinding box.

[0010] Preferably, the main and auxiliary grinding rollers mesh in opposite directions to grind the material, relying on extrusion and shearing to achieve deep material refinement; the screen cylinder with mixing plate circulates and re-grinds the material, and the scraper continuously cleans the material adhering to the box wall to prevent material blockage and arching.

[0011] Furthermore, the grinding assembly also includes a screen plate, a screen plate oscillating gear, a sealing plate, and a screen cylinder gear. The screen plate slides at the discharge port of the grinding box, and both ends of the screen plate penetrate the side wall of the discharge port. The screen plate oscillating gear rotates on the outer side wall of the grinding box and meshes with the main roller gear. The sealing plate is located in the sealing plate groove. The screen cylinder gear rotates on the grinding auxiliary roller and is located inside the gear ring and meshes with the gear ring.

[0012] Furthermore, one end of the screen plate is provided with a spring bracket, the top of the spring bracket is provided with a screen plate return spring, the screen plate return spring is located outside the grinding box, and the end of the screen plate return spring is attached to the side wall of the grinding box. The other end of the screen plate is provided with an oscillating rod, the oscillating rod is attached to the end face of the screen plate oscillating gear, and the end face of the screen plate oscillating gear is provided with an array of vibration bosses.

[0013] Preferably, the vibrating gear, spring, and screen plate form a self-excited vibrating screening structure, which automatically intercepts the backflow of coarse material for re-grinding, making the screen holes less prone to clogging and achieving high grading accuracy; the sealing plate and gear ring seal the transmission parts, preventing powder from wearing the gears and extending the service life of the transmission components.

[0014] Furthermore, the screening assembly includes a screening box, coarse and fine screening discs, and a stepped discharge plate. The top of the screening box is provided with a feeding port, and the discharge port is located above the feeding port. The upper side of the screening box is provided with a screening disc groove, in which the coarse and fine screening discs slide. The stepped discharge plate is located on the bottom side of the screening box.

[0015] Furthermore, the screening box has a coarse particle discharge port and a fine particle discharge port at the front end, a stepped plate groove penetrating the bottom at the rear end, a rebound rod through hole symmetrically provided on the rear side wall of the screening disc slide groove, a toothed rod groove penetrating the side wall on both sides of the screening box, and a sector gear column symmetrically provided on both sides of the screening box, the sector gear column being located below the toothed rod groove.

[0016] Furthermore, the coarse and fine screening discs are provided with a discharge trough at the front end, the discharge trough being located at the coarse particle discharge port, and a buffer platform being provided at the discharge trough. Side wall toothed rods are symmetrically provided on the outer side of the coarse and fine screening discs, and the side wall toothed rods slide within the toothed rod grooves. Rebound rods are symmetrically provided at the rear end of the coarse and fine screening discs, and the rebound rods are located within the rebound rod through holes. A limiting plate is provided at the end of the rebound rod, and a drive rod groove is provided on the limiting plate. The rebound rods are also provided with screening springs, one end of which is located on the limiting plate, and the other end of which is attached to the outer wall of the screening box.

[0017] Furthermore, the stepped feed plate slides within the stepped plate groove, the stepped feed plate surface is provided with stepped bosses, the end of the stepped feed plate is provided with a drive rod, the drive rod is located outside the screening box and is located within the drive rod groove, the screening assembly also includes a sector gear, the sector gear is rotatably mounted on a sector gear column, the sector gear meshes with a side wall gear, the outside of the sector gear is provided with a gear transmission part, the gear transmission part is connected to the auxiliary roller transmission wheel through a transmission belt.

[0018] Preferably, the sector gear and screen spring drive the coarse and fine screen discs to reciprocate and oscillate for grading, and the stepped discharge plate is linked synchronously to prevent fine material from accumulating on the stepped discharge plate. Qualified fine material and coarse aggregate are automatically discharged separately. The box body integrates multiple sets of sliding grooves and limit holes, the sliding parts operate stably, and the buffer platform reduces the impact of discharge. It can directly produce two specifications of recycled aggregate, eliminating the need for external screening equipment.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Three-stage continuous processing steps for excellent crushing and refining effect and uniform aggregate particle size: The equipment integrates three processes from top to bottom: crushing, grinding, and fine screening. The material is conveyed continuously in a closed system without intermediate transfer: The crushing wheel first impacts and squeezes large pieces of concrete waste for pre-crushing; the main and auxiliary rollers of the mill rotate in opposite directions and rely on the depth of extrusion and shearing to refine the material; the material mixing plate of the screen cylinder lifts up coarse particles to achieve cyclic re-grinding, and repeated grinding eliminates large particles. The finished recycled aggregate has a uniform particle size and the refining quality is superior to that of traditional single-stage crushing equipment.

[0020] 2. Equipped with a self-cleaning and anti-clogging structure, enabling long-term continuous production: The sieve cylinder is equipped with a scraper that rotates against the inner wall of the grinding box, scraping away powder adhering to the box wall in real time to prevent material accumulation and bridging that blocks the channel; the screen plate relies on the vibrating gear and the return spring to form a high-frequency self-vibration, preventing fine powder from clogging the screen holes; the sealing plate seals the gaps in the gear ring, preventing powder from entering the gear pair and causing jamming and wear. The equipment does not require frequent shutdowns for cleaning and blockage, and has strong stability for continuous operation.

[0021] 3. In-machine double-layer grading and screening, automatic separation of coarse and fine aggregates, no need for external screening equipment: The screen plate in the grinding section completes the initial sorting, and the coarse material exceeding the standard is intercepted and re-grinded; the screening component below relies on the sector gear and screen spring to drive the coarse and fine screen discs to oscillate back and forth for secondary grading. With the synchronous linkage of the stepped feeding plate, the fine aggregate is discharged from the fine particle feeding port and the coarse aggregate is separated from the coarse particle feeding port. One machine produces two specifications of recycled aggregates, eliminating the need for additional supporting screening equipment, reducing the production line footprint, and improving processing efficiency.

[0022] 4. Enclosed overall structure, less dust, and friendly working environment: The crushing box, grinding box, and screening box are connected to form a complete enclosed material channel. The material is crushed, ground, and screened inside the box throughout the entire process, which greatly reduces dust leakage during crushing and transportation, improves the workshop working environment, and reduces the investment in dust pollution control. Attached Figure Description

[0023] Figure 1 This is a perspective view of a refining and crushing mechanism for recycled concrete waste proposed in this invention. Figure 2 This is a front view of a recycled concrete waste refining and crushing mechanism proposed in this invention. Figure 3 for Figure 2 A cross-sectional view along section line AA; Figure 4 for Figure 3 A cross-sectional view along the cutting line BB; Figure 5 This is a schematic diagram of the grinding component of a refining and crushing mechanism for recycled concrete waste proposed in this invention. Figure 6 for Figure 5 A cross-sectional view along the section line CC; Figure 7 for Figure 6 A cross-sectional view along the cutting line DD; Figure 8 for Figure 7 A cross-sectional view along the cutting line EE; Figure 9 for Figure 7 A cross-sectional view along the cutting line FF; Figure 10 This is a schematic diagram of the screen cylinder of a recycling concrete waste refining and crushing mechanism proposed in this invention; Figure 11 This is a schematic diagram of the screen plate of a recycling concrete waste refining and crushing mechanism proposed in this invention. Figure 12 This is a schematic diagram of the screening box structure of a recycling concrete waste refining and crushing mechanism proposed in this invention; Figure 13 This is a schematic diagram of the coarse and fine screen discs of a recycled concrete waste refining and crushing mechanism proposed in this invention. Figure 14 This is a schematic diagram of the stepped feeding plate of a recycled concrete waste refining and crushing mechanism proposed in this invention.

[0024] Among them, 1. Crushing assembly, 11. Crushing box, 111. Feed inlet, 112. Discharge outlet, 12. Crushing wheel, 13. Crushing gear, 14. Gear drive wheel; 2. Grinding assembly, 21. Grinding box, 211. Feed inlet, 212. Discharge outlet, 22. Main grinding roller, 221. Main roller gear, 23. Auxiliary grinding roller, 231. Auxiliary roller gear, 232. Auxiliary roller drive wheel, 24. Grinding motor, 241. Motor drive wheel, 25. Screen cylinder, 251. Mixing plate, 252. Scraper, 253. Gear ring, 254. Sealed plate groove, 26. Screen plate, 261. Spring bracket, 262. Screen plate return spring, 263. Vibrating rod, 27. Screen plate vibrator. 271. Gear, 28. Vibrating boss, 29. Sealing plate, 30. Screening cylinder gear, 31. Screening assembly, 31. Screening box, 311. Feeding port, 312. Coarse particle discharge port, 313. Fine particle discharge port, 314. Screening disc slide groove, 3141. Rebound rod through hole, 315. Stepped plate groove, 316. Toothed rod groove, 317. Sector gear column, 32. Coarse and fine screening discs, 321. Discharge chute, 322. Side wall toothed rod, 323. Rebound rod, 3231. Limiting plate, 3232. Drive rod groove, 324. Screening spring, 325. Buffer platform, 33. Stepped discharge plate, 331. Stepped boss, 332. Drive rod, 34. Sector gear, 341. Gear transmission part.

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0026] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] like Figures 1-14 As shown, the present invention proposes a refining and crushing mechanism for recycled concrete waste, including a crushing component 1, a grinding component 2, and a screening component 3. The grinding component 2 is mounted on the screening component 3, and the crushing component 1 is mounted on the grinding component 2. The grinding component 2 includes a grinding box 21, a main grinding roller 22, a secondary grinding roller 23, a grinding motor 24, and a screen cylinder 25. The main grinding roller 22 rotates at the center of the grinding box 21, the secondary grinding roller 23 is horizontally arranged on one side of the main grinding roller 22 and rotates inside the grinding box 21, the grinding motor 24 is mounted on the main grinding roller 22, and the screen cylinder 25 rotates inside the grinding box 21.

[0029] The crushing assembly 1 includes a crushing box 11, a crushing wheel 12, a crushing gear 13, and a gear drive wheel 14. The crushing box 11 has a feed inlet 111 at the top and a discharge outlet 112 at the bottom. The crushing wheel 12 is symmetrically arranged at the discharge outlet 112. The crushing gear 13 is located at both ends of the crushing wheel 12, and the gear drive wheel 14 is located at one end of one of the crushing wheels 12. The crushing gear 13 and the gear drive wheel 14 are meshed and connected. The grinding box 21 has a feed inlet 211 at the top and a discharge outlet 212 at the bottom. The discharge outlet 112 is located on the feed inlet 211.

[0030] The main grinding roller 22 is equipped with main roller gears 221 at both ends, and the auxiliary grinding roller 23 is equipped with auxiliary roller gears 231 at both ends. A auxiliary roller drive wheel 232 is provided on the outside of the auxiliary roller gear 231. The main roller gear 221 and the auxiliary roller gear 231 are meshed and connected. The output shaft of the grinding motor 24 is fixed on the main roller gear 221. The output shaft of the grinding motor 24 is equipped with a motor drive wheel 241. The motor drive wheel 241 and the gear drive wheel 14 are connected by a transmission belt.

[0031] The screen cylinder 25 is provided with a circular array of mixing plates 251. A gear ring 253 is provided on one side of the screen cylinder 25. A sealed plate groove 254 is provided on the inner wall of the gear ring 253. The screen cylinder 25 is also provided with scrapers 252. Three scrapers 252 are arranged in a circular array on the mixing plates 251 of the screen cylinder 25. The outer wall of the scrapers 252 is attached to the inner wall of the grinding box 21.

[0032] The grinding assembly 2 also includes a screen plate 26, a screen plate oscillating gear 27, a sealing plate 28, and a screen cylinder gear 29. The screen plate 26 slides at the discharge port 212 of the grinding box 21, and both ends of the screen plate 26 penetrate the side wall of the discharge port 212. The screen plate oscillating gear 27 rotates on the outer side wall of the grinding box 21, and the screen plate oscillating gear 27 is meshed with the main roller gear 221. The sealing plate 28 is located in the sealing plate groove 254. The screen cylinder gear 29 rotates on the grinding auxiliary roller 23, and the screen cylinder gear 29 is located inside the gear ring 253 and meshes with the gear ring 253.

[0033] A spring bracket 261 is provided at one end of the screen plate 26, and a screen plate reset spring 262 is provided at the top of the spring bracket 261. The screen plate reset spring 262 is located outside the grinding box 21, and the end of the screen plate reset spring 262 is attached to the side wall of the grinding box 21. A vibrating rod 263 is provided at the other end of the screen plate 26, and the vibrating rod 263 is attached to the end face of the screen plate vibrating gear 27. Vibrating bosses 271 are arrayed on the end face of the screen plate vibrating gear 27.

[0034] The screening assembly 3 includes a screening box 31, coarse and fine screening discs 32, and a stepped discharge plate 33. The top of the screening box 31 is provided with a feeding port 311 and a discharge port 212 is provided on the feeding port 311. The upper side of the inside of the screening box 31 is provided with a screening disc slide groove 314, in which the coarse and fine screening discs 32 slide. The stepped discharge plate 33 is provided on the bottom side of the inside of the screening box 31.

[0035] The screening box 31 has a coarse particle discharge port 312 and a fine particle discharge port 313 at the front end. The screening box 31 has a stepped plate groove 315 that penetrates the bottom at the rear end. The rear side wall of the screening disc slide groove 314 has symmetrically provided rebound rod through holes 3141. The screening box 31 has toothed grooves 316 that penetrate the side wall on both sides. The screening box 31 also has symmetrically provided sector gear columns 317 on both sides. The sector gear columns 317 are located below the toothed grooves 316.

[0036] The coarse and fine screening disc 32 has a discharge trough 321 at its front end, which is located at the coarse particle discharge port 312. A buffer platform 325 is provided at the discharge trough 321. Side wall toothed rods 322 are symmetrically provided on the outer side of the side wall of the coarse and fine screening disc 32. The side wall toothed rods 322 slide in the toothed rod groove 316. Rebound rods 323 are symmetrically provided at the rear end of the coarse and fine screening disc 32. The rebound rods 323 are located in the rebound rod through hole 3141. A limiting plate 3231 is provided at the end of the rebound rod 323. A drive rod groove 3232 is provided on the limiting plate 3231. The rebound rod 323 is also provided with a screening spring 324. One end of the screening spring 324 is located on the limiting plate 3231, and the other end of the screening spring 324 is attached to the outer wall of the screening box 31.

[0037] The stepped feed plate 33 slides within the stepped plate groove 315. The stepped feed plate 33 has stepped bosses 331 arrayed on its surface. The end of the stepped feed plate 33 has a drive rod 332 located outside the screening box 31 and within the drive rod groove 3232. The screening assembly 3 also includes a sector gear 34, which is rotatably mounted on a sector gear column 317. The sector gear 34 meshes with the side wall gear 322. A gear transmission part 341 is provided on the outside of the sector gear 34. The gear transmission part 341 is connected to the auxiliary roller transmission wheel 232 via a transmission belt.

[0038] In practical use, the grinding motor 24 is started, which drives the main grinding roller 22 and the main roller gear 221 to rotate synchronously. The main roller gear 221 drives the auxiliary roller gear 231 to rotate in the opposite direction to the auxiliary grinding roller 23 through meshing transmission, and at the same time drives the screen plate oscillating gear 27 to rotate synchronously. The motor drive wheel 241 rotates synchronously with the main grinding roller 22, and drives the gear drive wheel 14 to rotate through the transmission belt, which drives the two sets of crushing wheels 12 to rotate in opposite directions through two sets of meshing crushing gears 13. The auxiliary roller drive wheel 232 rotates synchronously with the auxiliary grinding roller 23, and drives the gear drive part 341 and the sector gear 34 to rotate synchronously through the transmission belt; at the same time, the screen cylinder gear 29 rotates synchronously with the auxiliary grinding roller 23, and drives the screen cylinder 25 to rotate around its own axis inside the grinding box 21 through the meshing of the gear ring 253. After all moving parts are running smoothly, the recycled concrete waste to be processed is put into the crushing box 11 through the feed inlet 111.

[0039] Concrete waste falls between two sets of counter-rotating crushing wheels 12, where it is crushed into smaller concrete fragments by the pressure and impact of the teeth on the surface of the crushing wheels 12. The crushed material then falls into the grinding box 21 through the discharge port 112 and the inlet 211 under the action of gravity, and enters the grinding and refining process.

[0040] The material falling into the grinding box 21 falls into the grinding gap between the main grinding roller 22 and the auxiliary grinding roller 23. Through the squeezing and shearing forces generated by the relative rotation of the two rollers, the concrete fragments are further ground and refined into granular materials. The ground material falls downwards into the area where the screen cylinder 25 is located.

[0041] The screen cylinder 25 rotates continuously, and the mixing plate 251 on the outer wall drives the material to continuously turn over, so that the coarse particles that are not fully ground are lifted up and fall back to the grinding roller area for re-grinding, thereby improving the uniformity of material fineness. At the same time, the scraper 252 on the screen cylinder 25 rotates synchronously with the cylinder body, continuously scraping off the concrete powder adhering to the inner wall of the grinding box 21, preventing the material from arching and sticking to the wall, which would cause the channel to be blocked.

[0042] During the grinding process, materials with a particle size smaller than the screen hole size of the screen plate 26 pass through the screen holes under the action of gravity and the vibration of the screen plate, and fall into the screening component 3 below through the discharge port 212 and the feed port 311; materials with a particle size exceeding the standard are intercepted by the screen plate 26 and continue to be ground in the grinding box 21 until the particle size reaches the standard and then fall.

[0043] The vibrating gear 27 of the screen plate rotates continuously with the main roller gear 221. The vibrating boss 271 on the end face periodically pushes the vibrating rod 263. With the elastic rebound of the screen plate return spring 262, the screen plate 26 is driven to perform high-frequency reciprocating vibration in the transverse direction, so that the material above the screen hole keeps jumping, effectively avoiding fine powder from clogging the screen hole and ensuring screening efficiency and smooth discharge.

[0044] Material falling into screening box 31 first falls onto coarse and fine screening disc 32. The sector gear 34 rotates continuously, and through meshing with the side wall toothed rod 322, it drives the coarse and fine screening disc 32 to slide forward along the screening disc slide groove 314, while compressing the screening spring 324. When the toothless section of the sector gear 34 rotates to the position of the side wall toothed rod 322, the gear meshing disengages, and the screening spring 324 rebounds and pushes the coarse and fine screening disc 32 to reset backward, thereby realizing the back-and-forth reciprocating screening motion of the coarse and fine screening disc 32. At the same time, the stepped feed plate 33 is connected to the rebound rod 323 through the drive rod 332, so that the stepped feed plate 33 follows the coarse and fine screening disc 32 to perform back-and-forth reciprocating screening motion.

[0045] During the screening process, fine particles smaller than the screen openings of the coarse and fine screen discs 32 pass through the screen and fall onto the stepped feed plate 33. Under the reciprocating oscillation of the stepped feed plate 33, the fine particles are pushed step by step by the stepped protrusions 331 and discharged from the fine particle discharge port 313. Coarse particles are retained on the coarse and fine screen discs 32 and are conveyed forward with the screening process. They are discharged through the discharge chute 321 and the coarse particle discharge port 312. Particles of different sizes can be adapted to different concrete production processes.

[0046] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A refining and crushing mechanism for recycled concrete waste, characterized in that: It includes a crushing component (1), a grinding component (2) and a screening component (3), wherein the grinding component (2) is disposed on the screening component (3) and the crushing component (1) is disposed on the grinding component (2); The grinding assembly (2) includes a grinding box (21), a main grinding roller (22), a secondary grinding roller (23), a grinding motor (24), and a screen cylinder (25). The main grinding roller (22) rotates at the center of the grinding box (21). The secondary grinding roller (23) is horizontally arranged on one side of the main grinding roller (22) and rotates inside the grinding box (21). The grinding motor (24) is located on the main grinding roller (22). The screen cylinder (25) rotates inside the grinding box (21).

2. The refining and crushing mechanism for recycled concrete waste according to claim 1, characterized in that: The crushing assembly (1) includes a crushing box (11), a crushing wheel (12), a crushing gear (13), and a gear drive wheel (14). The crushing box (11) has a feed inlet (111) at the top and a discharge outlet (112) at the bottom. The crushing wheel (12) is symmetrically arranged at the discharge outlet (112). The crushing gear (13) is located at both ends of the crushing wheel (12). The gear drive wheel (14) is located at one end of one of the crushing wheels (12). The crushing gear (13) and the gear drive wheel (14) are meshed and connected. The grinding box (21) has a feed inlet (211) at the top and a discharge outlet (212) at the bottom. The discharge outlet (112) is located on the feed inlet (211).

3. The refining and crushing mechanism for recycled concrete waste according to claim 2, characterized in that: The main grinding roller (22) is provided with main roller gears (221) at both ends, and the auxiliary grinding roller (23) is provided with auxiliary roller gears (231) at both ends. The auxiliary roller gears (231) are provided with auxiliary roller drive wheels (232) on the outside of the auxiliary roller gears (231). The main roller gears (221) and auxiliary roller gears (231) are meshed and connected. The output shaft of the grinding motor (24) is fixed on the main roller gears (221). The output shaft of the grinding motor (24) is provided with a motor drive wheel (241). The motor drive wheel (241) is connected to the gear drive wheel (14) through a transmission belt.

4. The refining and crushing mechanism for recycled concrete waste according to claim 3, characterized in that: The screen cylinder (25) is provided with a circular array of mixing plates (251). A gear ring (253) is provided on one side of the screen cylinder (25). A sealed plate groove (254) is provided on the inner wall of the gear ring (253). The screen cylinder (25) is also provided with scrapers (252). Three scrapers (252) are arranged in a circular array on the mixing plate (251) of the screen cylinder (25). The outer wall of the scraper (252) is attached to the inner wall of the grinding box (21).

5. The refining and crushing mechanism for recycled concrete waste according to claim 4, characterized in that: The grinding assembly (2) further includes a screen plate (26), a screen plate oscillating gear (27), a sealing plate (28), and a screen cylinder gear (29). The screen plate (26) slides at the discharge port (212) of the grinding box (21), and both ends of the screen plate (26) penetrate the side wall of the discharge port (212). The screen plate oscillating gear (27) rotates on the outer side wall of the grinding box (21), and the screen plate oscillating gear (27) meshes with the main roller gear (221). The sealing plate (28) is located in the sealing plate groove (254). The screen cylinder gear (29) rotates on the grinding auxiliary roller (23), and the screen cylinder gear (29) is located inside the gear ring (253) and meshes with the gear ring (253).

6. The refining and crushing mechanism for recycled concrete waste according to claim 5, characterized in that: One end of the screen plate (26) is provided with a spring bracket (261), and the top of the spring bracket (261) is provided with a screen plate reset spring (262). The screen plate reset spring (262) is located outside the grinding box (21), and the end of the screen plate reset spring (262) is attached to the side wall of the grinding box (21). The other end of the screen plate (26) is provided with an oscillating rod (263), and the oscillating rod (263) is attached to the end face of the screen plate oscillating gear (27). The end face of the screen plate oscillating gear (27) is provided with an array of vibration bosses (271).

7. The refining and crushing mechanism for recycled concrete waste according to claim 6, characterized in that: The screening assembly (3) includes a screening box (31), a coarse and fine screening disc (32), and a stepped discharge plate (33). The top of the screening box (31) is provided with a feeding port (311), and the discharge port (212) is provided on the feeding port (311). The upper side of the inside of the screening box (31) is provided with a screening disc slide groove (314). The coarse and fine screening disc (32) slides in the screening disc slide groove (314). The stepped discharge plate (33) is provided on the bottom side of the inside of the screening box (31).

8. The refining and crushing mechanism for recycled concrete waste according to claim 7, characterized in that: The screening box (31) has a coarse particle discharge port (312) and a fine particle discharge port (313) at the front end. The screening box (31) has a stepped plate groove (315) that penetrates the bottom at the rear end. The rear side wall of the screening disc slide groove (314) has a symmetrical spring rod through hole (3141). The screening box (31) has a toothed rod groove (316) that penetrates the side wall on both sides. The screening box (31) also has a sector gear column (317) that is symmetrically arranged on both sides. The sector gear column (317) is located below the toothed rod groove (316).

9. The refining and crushing mechanism for recycled concrete waste according to claim 8, characterized in that: The coarse and fine screening disc (32) has a discharge chute (321) at its front end, located at the coarse particle discharge port (312). A buffer platform (325) is provided at the discharge chute (321). Sidewall teeth (322) are symmetrically arranged on the outer side of the coarse and fine screening disc (32), sliding within the tooth groove (316). Rebound rods (323) are symmetrically arranged at the rear end of the coarse and fine screening disc (32). The rebound rod (323) is located in the rebound rod through hole (3141). The end of the rebound rod (323) is provided with a limiting plate (3231). The limiting plate (3231) is provided with a drive rod groove (3232). The rebound rod (323) is also provided with a screening spring (324). One end of the screening spring (324) is located on the limiting plate (3231), and the other end of the screening spring (324) is attached to the outer wall of the screening box (31).

10. The refining and crushing mechanism for recycled concrete waste according to claim 9, characterized in that: The stepped feed plate (33) slides in the stepped plate groove (315). The stepped feed plate (33) has stepped bosses (331) arranged on its surface. The stepped feed plate (33) has a drive rod (332) at its end. The drive rod (332) is located outside the screening box (31) and is located in the drive rod groove (3232). The screening assembly (3) also includes a sector gear (34). The sector gear (34) is rotatably mounted on a sector gear column (317). The sector gear (34) meshes with the side wall gear (322). The sector gear (34) has a gear transmission part (341) on its outer side. The gear transmission part (341) is connected to the auxiliary roller transmission wheel (232) via a transmission belt.

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