Building concrete aggregate recovery device

Abstract

The invention relates to the technical field of crushing equipment, in particular to a building concrete aggregate recycling device. Comprising a machine shell, two sets of hollow rotating rollers are symmetrically and rotationally installed in the machine shell, a plurality of discs are axially fixed to the outer edge faces of the two rotating rollers at intervals, a plurality of connecting shafts are slidably installed on the discs in the radial direction, chain hammers are installed on the connecting shafts, lantern rings in one-to-one correspondence with the connecting shafts are embedded in the rotating rollers, and steel strands are arranged between the connecting shafts and the lantern rings. A driving lever is arranged on the inner wall of the lantern ring, a driving shaft is embedded in the rotating roller, the driving shaft and the rotating roller are arranged in a non-coaxial mode, a spiral plate is fixed to the driving shaft, and the driving shaft is matched with the rotating roller through a transmission structure and rotates in a differential mode with the rotating roller. The driving shaft drives the spiral plate to poke the poke rod, so that the lantern ring deflects, the lantern ring pulls the chain hammer to retract through the steel strand, and after the spiral plate is separated from the poke rod, the chain hammer restores, so that the swing radius of the chain hammer is regulated and controlled, the impact energy of the chain hammer in the contraction state is changed, and regulation and control of the impact energy of the chain hammer are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of crushing equipment, and particularly relates to a device for recycling construction concrete aggregates. Background Art

[0002] Construction concrete aggregates (usually referring to natural mineral materials such as sand and stone) are the main skeleton materials that make up concrete. On the one hand, with the progress of infrastructure construction, the demand for natural sand and gravel aggregates has increased sharply; on the other hand, if the waste concrete generated by a large number of building demolition and renovation projects is directly landfilled without treatment, it will not only occupy precious land resources, but also the alkaline leachate of the cement hydrate in it will pollute the soil and groundwater. Therefore, many enterprises will recycle the aggregates (i.e., recycled aggregates) in construction waste concrete and reuse them to prepare new concrete or subgrade materials.

[0003] The existing mainstream recycling process usually includes a pretreatment link: first, the waste concrete blocks are baked at a high temperature (300 - 600 °C), and the cement hydrates (such as Ca(OH)2) are partially dehydrated and carbonized by thermal decomposition to weaken the bonding strength at the interface between the cement paste and the original aggregates. The baked concrete blocks then enter the crushing equipment for mechanical crushing to effectively separate the aggregates from the hardened cement paste, and graded recycled aggregates with controllable gradation are obtained through screening.

[0004] As the core link for controlling the quality of recycled aggregates, the performance of the crushing equipment directly affects the particle shape of the aggregates, the crushing efficiency, and the powder production rate. When traditional jaw crushers or impact crushers are used to process recycled concrete materials with complex compositions and different hardnesses, due to the fixed installation positions of their crushing structures, the crushing impact is only regulated by the driving motor, making it difficult to adapt to the size and strength of waste concrete blocks in real time, and often facing problems such as poor particle size uniformity and fast wear of the hammer heads / liners.

[0005] For this reason, the present invention provides a device for recycling construction concrete aggregates, which adopts a chain - hammer structure, performs crushing through rotary impact, uses adjustable - length chains to connect the swing hammers and the rotor, and dynamically controls the swing radius and impact kinetic energy of the swing hammers by adjusting the chain length in real time. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art, and a device for recycling construction concrete aggregates is proposed.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions: A building concrete aggregate recycling device, comprising a casing, a feeding hopper is provided at the upper end of the casing, a discharging hopper is provided at the lower end of the casing, two groups of hollow rotating rollers are symmetrically and rotatably installed in the casing, a plurality of discs are axially spaced and fixed on the outer edge surfaces of the two rotating rollers, a plurality of connecting shafts are radially slidably installed on the discs, and chain hammers extending out of the discs are installed on the connecting shafts. A mesh plate is arranged in the casing between the rotating rollers and the discharging hopper. Collars corresponding to the connecting shafts one by one are embedded in the rotating rollers. Steel strands penetrating the rotating rollers are arranged between the connecting shafts and the collars. Poking rods are arranged on the inner walls of the collars. A driving shaft is embedded in the rotating roller, the driving shaft is not coaxially arranged with the rotating roller, a spiral plate cooperating with the poking rods is fixed on the driving shaft, and the driving shaft is differentially rotated with the rotating roller by means of a transmission structure cooperating with the rotating roller.

[0008] Preferably, the transmission structure is a gear speed increasing structure, including a first end face gear fixed at one end of the rotating roller extending out of the casing, the first end face gear meshes with a first transmission gear rotatably installed on the outer wall of the casing, the first transmission gear is coaxially and rotationally matched with a second transmission gear, and the second transmission gear meshes with a second end face gear fixed on the driving shaft.

[0009] Preferably, it further includes a driving structure for driving the driving shaft to axially move in the rotating roller, and chucks are arranged on both end faces of each collar on the driving shaft.

[0010] Preferably, an embedding groove communicated with the notch is arranged on the inner wall of the rotating roller on the side where the driving shaft is pulled out of the rotating roller.

[0011] Preferably, the driving structure is a telescopic rod structure.

[0012] Preferably, the number of spiral turns of the spiral plate does not exceed 2 turns.

[0013] Preferably, a sinking structure fitting the two groups of rotating rollers is arranged at the bottom end of the mesh plate, and the two sides are inclined plates.

[0014] Preferably, it further includes a spring seat arranged at the lower end of the casing.

[0015] Preferably, the discs are axially slidably installed on the rotating rollers, a positioning sleeve is arranged between adjacent discs, an opening corresponding to the notch is arranged on the positioning sleeve, and two groups of covers are symmetrically and tightly installed on the rotating roller through bolts, and the two covers respectively abut against the two side positioning sleeves facing the two ends of the rotating roller.

[0016] A building concrete aggregate recycling method, including: S1: baking the aggregate in a rotary kiln; S2: separating the crushed materials of the baked aggregate by a vibrating screen; S3: mechanically damaging the screened aggregate.

[0017] Compared with the prior art, the present invention provides a construction concrete aggregate recovery device, which has the following beneficial effects: 1. In the present invention, while the roller rotates, the driving shaft is driven to rotate synchronously through the transmission structure. Due to the different rotation speeds, the spiral plate will shift the lever during the rotation of the driving shaft, thereby causing the ring to deflect. The ring pulls the connecting shaft to move in the axial direction of the disc through the steel strand, thereby pulling the chain hammer back in the axial direction of the disc through the chain. After the spiral plate is separated from the lever, the chain hammer will recover under the centrifugal effect, thereby achieving stepless and continuous regulation of the swing radius of the chain hammer, so that the impulse energy of the chain hammer in the contracted state changes continuously, so as to realize the regulation of the chain hammer impulse energy.

[0018] 2. The spiral plate of the present invention is spiral-shaped. During the rotation process, the lever will be moved in sequence along the axis of the roller, thereby driving the chain hammers at different positions to swing in sequence. This hammering operation will cause the uncontracted chain hammer to produce splashes in the area where the chain hammer radius is contracted after striking the aggregate, producing a macroscopic material shifting effect in the casing, so that the material is crushed and evenly distributed.

[0019] 3. The present invention is provided with a driving structure, through which the power transmission between the rotating roller and the driving shaft is controlled. After the power transmission is disconnected, the chain hammer maintains a constant rotation radius to perform crushing processing with stable impact.

[0020] 4. The present invention is provided with a spring seat, which produces a vibrating screen effect in coordination with the vibration generated by the impact crusher itself, thereby improving the material discharge efficiency.

[0021] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of the present invention Figure 1 .

[0023] Figure 2 A three-dimensional schematic diagram of the present invention Figure 2 .

[0024] Figure 3 It is a front view schematic diagram of the present invention.

[0025] Figure 4 It is a rear view schematic diagram after removing the spring seat, the upper hopper and the lower hopper of the present invention.

[0026] Figure 5 For the present invention Figure 3 Schematic diagram of the cross section at AA in the figure.

[0027] Figure 6 For the present invention Figure 5 Cross-sectional view taken along line B-B in

[0028] Figure 7 Radial cross-sectional view at the collar of the present invention

[0029] Figure 8 For the present invention Figure 7 Radial cross-sectional view of the drive shaft within the roller in

[0030] Figure 9 Schematic combined view of the double-group chain hammer crushing structure of the present invention

[0031] Figure 10 Schematic perspective view of the single-group chain hammer crushing structure of the present invention

[0032] Figure 11 Stereogram and cross-sectional view of the spiral plate and chuck on the drive shaft of the present invention

[0033] Figure 12 Stereogram and cross-sectional view of the spiral plate structure on the drive shaft of the present invention

[0034] Figure 13 For the present invention Figure 5 Assembly schematic view of the chain hammer crushing structure within the casing in

[0035] Figure 14 For the present invention Figure 13 Partial schematic view at position C in

[0036] Figure 15 For the present invention Figure 13 Schematic view of the chain hammer crushing structure in

[0037] Figure 16 For the present invention Figure 15 Assembly structure schematic view of a single chain hammer in

[0038] Figure 17 For the present invention Figure 16 Partial schematic view at position D in

[0039] Figure 18 Schematic view of the installation structure of the side cover of the casing of the present invention

[0040] In the figure: 1. Casing; 2. Spring seat; 3. Feeding hopper; 4. Discharging hopper; 5. Mesh plate; 6. Roller; 7. Disc; 8. Connecting shaft; 9. Chain hammer; 10. Steel strand; 11. Collar; 12. Notch; 13. Embedded groove; 14. Poking rod; 15. Drive shaft; 16. Spiral plate; 17. Chuck; 18. Telescopic rod structure; 19. Transmission structure; 20. Side cover; 21. Positioning pin; 22. Stud bush. Detailed implementation mode

[0041] The following will combine the attached drawings in the embodiments of the present invention Figures 1 - 18 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0042] Embodiment 1. In order to realize the dynamic regulation of the crushing impact kinetic energy, the present embodiment provides a building concrete aggregate recycling device, including a machine shell 1. A feed hopper is provided at the upper end of the machine shell 1, and a discharge hopper 4 is provided at the lower end. Two groups of hollow rotating rollers 6 are symmetrically and rotatably installed in the machine shell 1. A plurality of discs 7 are axially spaced and fixed on the outer edge surfaces of the two rotating rollers 6. A plurality of connecting shafts 8 are radially slidably installed on the discs 7. A chain hammer 9 extending out of the disc 7 is installed on the connecting shaft 8. A mesh plate 5 is provided in the machine shell 1 between the rotating roller 6 and the discharge hopper 4. A notch 12 corresponding to the connecting shaft 8 is provided on the outer edge surface of the rotating roller 6. A collar 11 corresponding to the connecting shaft 8 is embedded in the rotating roller 6. A steel wire rope 10 passing through the rotating roller 6 from the notch 12 is provided between the connecting shaft 8 and the collar 11. A dial rod 14 is provided on the inner wall of the collar 11. A driving shaft 15 is embedded in the rotating roller 6. The driving shaft 15 is not coaxially arranged with the rotating roller 6. A spiral plate 16 for cooperating with the dial rod 14 is fixed on the driving shaft 15. The driving shaft 15 is differentially rotated with the rotating roller 6 by the cooperation of the transmission structure 19 and the rotating roller 6.

[0043] The detailed principle of this embodiment: The machine shell 1 is made of high-strength steel plates, having good mechanical strength and toughness, so as to provide a frame foundation that can stably withstand the crushing impact.

[0044] Referring to the attached drawings Figure 1 As shown, a feeding hopper 3 is welded and fixed at the upper end of the machine shell 1, and feeding can be directly carried out from the feeding hopper 3; the feeding hopper 3 can also be docked with other storage structures to realize continuous feeding.

[0045] Referring to the attached drawings Figure 1 As shown, a discharge hopper 4 is welded and fixed at the lower end of the machine shell 1, which is used to guide the discharge of the aggregate particles separated by crushing and screening.

[0046] Referring to the attached drawings Figure 6 and the attached drawings Figure 9 As shown, two groups of hollow rotating rollers 6 are symmetrically and rotatably installed in the machine shell 1. Both ends of the two rotating rollers 6 pass through the front and rear end side walls of the machine shell 1, and a set of bearing seats are provided on the front and rear end side walls of the machine shell 1 respectively. The outer end heads of the rotating rollers 6 are embedded in the inner rings of the bearings of the bearing seats to realize the rotating installation.

[0047] The two rotating rollers 6 are driven by a driving device, which is a reduction motor fixed outside the machine housing 1. The reduction motor is docked with the rotating roller 6 through a chain drive, and the two rotating rollers 6 are individually driven by two groups of reduction motors respectively.

[0048] Refer to the appendix Figure 10 , appendix Figure 13 , appendix Figure 15 At the parts of the two rotating rollers 6 located inside the machine housing 1, a plurality of discs 7 are axially spaced and fixed. Every two discs 7 form a group. On the opposite sides of the two discs 7 in the same group, a plurality of sliding grooves are annularly arranged. The sliding grooves are arranged along the radial direction of the disc 7. A connecting shaft 8 is jointly embedded in the two corresponding sliding grooves on the two discs 7 in the same group, so that both ends of the connecting shaft 8 are slidably installed in the two sliding grooves. The part of the connecting shaft 8 between the two discs 7 is cylindrical, and a chain is inserted through this part. The end of the chain is fixedly installed with a chain hammer 9 through a bolt. The length of the chain is greater than the radius of the disc 7, so that the chain hammer 9 extends beyond the disc 7. In summary, a basic pendulum-type breaking structure is formed.

[0049] In order to realize the impact energy regulation of the pendulum, refer to the appendix Figure 16 , 17 As shown, on the side wall of the rotating roller 6 between the two discs 7 in the same group, there are notches 12 corresponding to the chain hammers 9 one by one. The notches 12 are located directly below the sliding grooves along the radial direction of the disc 7. A steel strand 10 is fixedly installed on each connecting shaft 8 through an anchor lock. The lower end of the steel strand 10 penetrates into the inside of the rotating roller 6 from the notch 12. A plurality of collar rings 11 are embedded in the rotating roller 6. The outer diameter of the collar ring 11 matches the inner diameter of the rotating roller 6. The outer wall of the collar ring 11 and the inner wall of the rotating roller 6 are both smooth surfaces, reducing the associated power generated by relative friction.

[0050] Refer to the appendix Figure 15 As shown, eccentric sleeves are provided at both ends inside the rotating roller 6. The axis of the eccentric sleeve is radially offset from the axis of the rotating roller 6. All the collar rings 11 are located inside the eccentric sleeves, and a driving shaft 15 is inserted through the two eccentric sleeves together, so that the driving shaft 15 is eccentrically arranged inside the rotating roller 6. One end of the driving shaft 15 away from the reduction motor extends out of the end of the rotating roller 6 and is matched with the rotating roller 6 through a transmission structure 19, so that when the rotating roller 6 rotates, it synchronously drives the driving shaft 15 to rotate, and through the setting of the structural transmission ratio, the rotational speeds of the rotating roller 6 and the driving shaft 15 are different to generate a differential speed.

[0051] Refer to the appendix Figure 12 As shown, a spiral plate 16 is provided on the outer wall of the driving shaft 15. The spiral plate 16 is spirally wound around the outer wall of the driving shaft 15. Refer to the appendix Figure 8 As shown, a lever 14 that cooperates with the spiral plate 16 is provided on the inner wall of the collar ring 11.

[0052] Refer to the appendix Figure 6As shown in the figure, a screen plate 5 is provided between the rotating roller 6 and the feeding hopper 4 inside the casing 1. The screen plate 5 is a perforated plate with a number of sieve holes evenly distributed thereon, and is used for screening aggregate particles that reach the required particle size.

[0053] A lining plate is fixedly installed inside the casing 1 by bolts, which is used to directly bear the impact of the splashing aggregate and cooperate with the impact force to achieve the impact crushing effect.

[0054] According to the above technical solution: Start the reduction motor to drive the two groups of rotating rollers 6 to rotate synchronously, thereby driving the chain hammers 9 to do centrifugal swinging. Under the cooperation of the centrifugal force and the revolving force of the rotating roller 6, energy is generated.

[0055] Add the concrete aggregate to be recycled from the feeding hopper 3 into the casing 1. After the aggregate falls and lands on the screen plate 5, the aggregate is continuously hammered by the chain hammers 9 and broken, achieving the crushing effect.

[0056] While the rotating roller 6 is rotating, the drive shaft 15 is driven to rotate synchronously through the transmission structure 19. Due to different rotation speeds, during the rotation of the drive shaft 15, the spiral plate 16 will continuously push the lever 14, so that the collar 11 deflects. The collar 11 pulls the connecting shaft 8 to move axially in the direction of the disc 7 through the steel strand 10, so as to pull the chain hammer 9 to retract axially in the direction of the disc 7 through the chain. After the spiral plate 16 is separated from the lever 14, under the centrifugal action of the chain hammer 9, it will return to its original state, thus achieving the regulation of the swing radius of the chain hammer 9. Under the condition that the rotation speed of the rotating roller 6 remains unchanged, the linear speeds of different rotation radii are different, so that the impact energy of the retracted chain hammer 9 changes, so as to realize the regulation of the impact energy of the chain hammer 9.

[0057] The spiral plate 16 is spiral-shaped. During the rotation process, it will push the lever 14 along the axial direction of the rotating roller 6 in turn, so as to drive the chain hammers 9 at different positions to swing in turn. This operating hammering state will cause the unretracted chain hammer 9 to splash in the area where the radius of the chain hammer 9 shrinks after hitting the aggregate, generating a macroscopic material transfer effect inside the casing 1. That is, during the hammering and crushing process, due to the sequential change of the impact energy of the chain hammer 9 along the axial direction of the rotating roller 6, the aggregate will be displaced to the side, and then the material displacement effect is achieved. The spiral setting of the spiral plate 16 will cause the aggregate to splash and move back and forth along the axial direction of the rotating roller 6, making the material crushing evenly distributed.

[0058] In summary: In this solution, while the chain hammer 9 swings rigidly to impact and crush, the drive shaft 15 is used to push the lever 14 to drive the collar 11 to deflect, and then pull the chain hammer 9 to retract, so as to realize the change of the impact radius: Shorten the chain → reduce the swing radius → increase the impact frequency and reduce the single impact force, taking care of the parts with different distances from the rotating roller 6 of the larger-sized aggregate, so that the aggregate is more evenly struck and the crushing effect is improved.

[0059] Extend the chain → increase the swing radius → significantly increase the linear speed and impact kinetic energy of the hammer head end, enhance the crushing ability, and reduce the impact damage of components.

[0060] In this plan, refer to the attached Figure 6 As shown, the bottom of the mesh plate 5 is provided with a sinking structure that matches the two groups of rollers 6, and the two sides are inclined plates. The sinking structure is arc-shaped to match the swing arc of the chain hammer 9, and the diameter of the sinking structure is larger than the maximum rotation radius of the chain hammer 9, leaving misalignment space for the aggregate and the adjacent chain hammer 9. It cannot be too large, so that the aggregate is stacked on the mesh plate 5 and the lower layer cannot be impacted and crushed.

[0061] In this solution, the rotation direction of the two rollers 6 can be controlled according to demand: the two rollers 6 rotate relative to each other, so that the material impacts and separates on the lining plates on both sides; the two rollers 6 rotate relative to each other, so that the material gathers and impacts between the two rollers 6, causing the aggregate to splash and break by self-impact.

[0062] Embodiment 2: This solution provides a specific transmission structure 19 that can realize differential rotation of the drive shaft 15 and the roller 6: the transmission structure 19 is a gear speed increasing structure, refer to the attached Figure 12 As shown, it includes an end gear 1 fixed on one end of the roller 6 extending out of the casing 1, the end gear 1 is meshed with a transmission gear 1 rotatably mounted on the outer wall of the casing 1, the transmission gear is coaxially rotated with a transmission gear 2, and the transmission gear 2 is meshed with an end gear 2 fixed on the drive shaft 15.

[0063] The roller 6 drives the end face gear 1 to rotate synchronously, the end face gear 1 drives the transmission gear 1 to rotate, the transmission gear 2 rotates synchronously with the transmission gear 1, the transmission gear 2 drives the end face gear 2 to rotate, and the end face gear 2 drives the drive shaft 15 to rotate synchronously. The above transmission realizes an arrangement with a transmission ratio less than 1, thereby forming an acceleration structure, so that the rotation speed of the drive shaft 15 is faster than that of the roller 6, so that the spiral plate 16 can move the collar 11 to drive the chain hammer 9 to change the diameter.

[0064] Embodiment 3, in a further embodiment of this scheme, according to the different states of the aggregate, the swing radius of the chain hammer 9 sometimes needs to be fixed at a certain position, and the above structure makes the rotation radius of the chain hammer 9 in a continuous changing state. Therefore, in this embodiment, a driving structure is provided that can drive the driving shaft 15 to move axially in the roller 6, and a chuck 17 is provided on both end surfaces of each collar 11 on the driving shaft 15.

[0065] The driving structure is a telescopic rod structure 18. The telescopic rod structure 18 is any one of a pneumatic rod, a hydraulic rod, and an electric telescopic rod. A rotating joint is provided at the protruding end of the telescopic rod structure 18, and the rotating joint is connected to the driving shaft 15, so that the driving shaft 15 can be driven to move without affecting the rotation of the driving shaft 15.

[0066] The axial movement of the drive shaft 15 is controlled by the extension and retraction of the telescopic rod structure 18. When the telescopic rod structure 18 is extended, the drive shaft 15 is pulled and moves toward the outside of the roller 6, so that the end gear 1 is separated from the transmission gear 1. At this time, the power is no longer transmitted between the roller 6 and the drive shaft 15, and the drive shaft 15 has no driving power. Then, during the rotation of the roller 6, the roller 6 rotates synchronously with the collar 11, and the lever 14 rotates synchronously against the drive shaft 15, and there is no differential speed, so that the chain hammer 9 no longer produces a change in the rotation radius.

[0067] As the telescopic rod structure 18 continues to extend, the chain hammer 9 is continuously pulled back. When the telescopic rod no longer changes, the swing radius of the chain hammer 9 is also fixed, thereby achieving fixed regulation of the impact radius of the chain hammer 9.

[0068] In this embodiment, the inner wall of the roller 6 is located on the side where the drive shaft 15 is pulled outward from the roller 6, and is provided with an embedding groove 13 communicating with the notch 12. The embedding groove 13 is designed to leave space for the steel strand 10 to extend when the pulling drive shaft 15 moves outward.

[0069] In this embodiment, since the transmission gear 2 and the end face gear 2 have a separation and meshing process, the end face gear and the gear both use spiral curved teeth or oblique teeth to reduce the probability of tooth collision.

[0070] Alternatively, another set of transmission gears 3 and 4 is provided. Transmission gear 3 meshes with transmission gear 2 and both are helical gears, while transmission gear 4 rotates coaxially with transmission gear 3 and meshes with the end gear. The telescopic section of the telescopic rod extends and fixes a support, a rotating shaft is fixed on the support, and transmission gear 3 and transmission gear 4 are installed on the rotating shaft to realize power transmission. In this way, the separation meshing characteristics of the helical gears can also avoid tooth collision.

[0071] Embodiment 4, in a further embodiment of this solution, the number of spiral turns of the spiral plate 16 does not exceed 2 turns. Figure 11 In the embodiment, the spiral plate 16 has 0.5 turns. At this time, the spiral plate 16 will be moved twice for each rotation of the driving shaft 15, thereby causing the chain hammer 9 to change its diameter twice. The number of turns should not be too large, lest the spiral curvature of the spiral plate 16 is too small, and the spiral plate 16 is completely fitted with the lever 14, thereby losing the misalignment space.

[0072] Embodiment 5. In a further embodiment of this solution, it further includes a spring seat 2 provided at the lower end of the casing 1. The spring seat 2 includes an upper seat and a lower seat, and multiple groups of spring shafts are axially distributed between the upper seat and the lower seat. When the roller 6 rotates to hammer the aggregate, due to the impact force, the casing 1 vibrates. Under the action of the spring, the vibration amplitude is amplified, thereby generating a vibrating sieve effect, and promoting the aggregate particles that meet the particle size to fall from the mesh plate 5.

[0073] Embodiment 6. In a further embodiment of this solution, the connecting shaft 8 and the disc 7 bear the centrifugal force of the chain hammer 9 swinging. After a long time, they need to be replaced as a whole. Therefore, in this solution, the disc 7 is separately arranged from the roller 6, so as to be replaced separately, reducing costs. At this time, the outer edge surface of the roller 6 is non-circular, and can be oval or rectangular, while the inner edge surface of the disc 7 fits with the outer edge surface of the roller 6. With a non-circular structure, after the disc 7 is installed on the roller 6, it can achieve integral synchronous rotation without being locked by bolts (it can also be connected by a key).

[0074] A positioning sleeve is provided between adjacent discs 7, leaving a space for installing the connecting shaft 8 between two discs 7 in the same group and realizing dimensional positioning. The positioning sleeve is provided with an opening corresponding to the notch 12 for the steel strand 10 to pass through.

[0075] Two groups of covers are symmetrically and firmly installed on the roller 6 through bolts, and the two covers respectively abut against the two side positioning sleeves facing the two ends of the roller 6.

[0076] Through the above structure, by successively installing the disc 7 and the positioning sleeve on the roller 6, integral connection is realized through a non-circular structure, and then the two ends are locked by the covers, and the shaking gap is eliminated.

[0077] Embodiment 7. In a further embodiment of this solution, the side covers 20 on the left and right sides of the casing 1 can be opened: the side covers 20 are rotatably installed on the casing 1, multiple groups of truss rods are provided on the outer surface of the side covers 20, a card slot is provided at the end of the truss rod away from the rotation installation end, and a positioning pin 21 is rotatably installed on the casing 1. The end of the limit pin is a stud, and a nut 22 is screwed on the stud.

[0078] Close the side cover 20, deflect the positioning pin 21 so that the positioning pin 21 is embedded in the card slot, and then screw on the nut 22 so that the nut 22 locks the truss rod, thereby sealing the side cover 20. Similarly, unscrew the nut 22 to open the side cover 20 for internal maintenance.

[0079] Embodiment 8. This embodiment provides a method for recycling building concrete aggregates, including: S1: Bake the aggregates in a rotary kiln.

[0080] Use the heat energy of the rotary kiln itself to bake the aggregate, and circulate the hot steam in the rotary kiln to improve the heat balance, so that some of the cement hydration products in the aggregate, such as calcium hydroxide, are dehydrated and carbonized, weakening the bonding strength at the interface between the cement paste and the original aggregate.

[0081] S2: Separate the crushed materials from the baked aggregate using a vibrating screen.

[0082] Put the baked concrete blocks into a large vibrating screen. Through the vibrating effect, the embrittled and carbonized parts in the concrete aggregate are separated, which can not only remove some invalid components in advance, but also reduce the impact pressure of subsequent crushing.

[0083] S3: Mechanically break the screened aggregate.

[0084] Put the initially screened aggregate into the above-mentioned crushing equipment again, so that the aggregate and the hardened cement are effectively separated, and graded recycled aggregate with controllable gradation is obtained through screening.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0086] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0087] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A building concrete aggregate recycling device, characterized in that, It includes a casing (1). A feed hopper is provided at the upper end of the casing (1), and a discharge hopper (4) is provided at the lower end. Two groups of hollow rotating rollers (6) are symmetrically and rotatably installed in the casing (1). A plurality of discs (7) are axially and spacedly fixed on the outer edge surfaces of the two rotating rollers (6). A plurality of connecting shafts (8) are radially slidably installed on the discs (7). Chain hammers (9) extending outside the discs (7) are installed on the connecting shafts (8). A mesh plate (5) is provided in the casing (1) between the rotating rollers (6) and the discharge hopper (4). Collars (11) corresponding one-to-one to the connecting shafts (8) are embedded in the rotating rollers (6). Steel strands (10) passing through the rotating rollers (6) are provided between the connecting shafts (8) and the collars (11). Poking rods (14) are provided on the inner walls of the collars (11). A driving shaft (15) is embedded in the rotating roller (6). The driving shaft (15) and the rotating roller (6) are not coaxially arranged. A spiral plate (16) cooperating with the poking rods (14) is fixed on the driving shaft (15). The driving shaft (15) is differentially rotated with the rotating roller (6) by the cooperation of a transmission structure (19) and the rotating roller (6).

2. The construction concrete aggregate recycling device according to claim 1, characterized in that, The transmission structure (19) is a gear speed increasing structure, including a first end face gear fixed at one end of the rotating roller (6) extending out of the casing (1). The first end face gear meshes with a first transmission gear rotatably installed on the outer wall of the casing (1). The first transmission gear is coaxially rotatably fitted with a second transmission gear. The second transmission gear meshes with a second end face gear fixed on the driving shaft (15).

3. The construction concrete aggregate recycling device according to claim 2, characterized in that, It further includes a driving structure for driving the driving shaft (15) to axially move in the rotating roller (6). Chucks (17) are provided at both end faces of each collar (11) on the driving shaft (15).

4. An apparatus for recycling building concrete aggregates according to claim 3, characterized in that, On the inner wall of the rotating roller (6) on the side where the driving shaft (15) is pulled out of the rotating roller (6), a groove (13) communicating with a notch (12) is provided.

5. An apparatus for recycling building concrete aggregates according to claim 3, characterized in that, The driving structure is a telescopic rod structure (18).

6. The construction concrete aggregate recycling device according to claim 1, characterized in that The number of spiral turns of the spiral plate (16) does not exceed 2 turns.

7. The concrete aggregate recycling device for building according to claim 1, characterized in that, The bottom end of the mesh plate (5) is provided with a sinking structure fitting the two rotating rollers (6), and the two sides are inclined plates.

8. The construction concrete aggregate recycling device according to claim 1, characterized in that, It further includes a spring seat (2) provided at the lower end of the casing (1).

9. The construction concrete aggregate recycling device according to claim 1, wherein, The discs (7) are axially slidably installed on the rotating roller (6). A positioning sleeve is provided between adjacent discs (7). An opening corresponding to the notch (12) is provided on the positioning sleeve. Two groups of covers are symmetrically and tightly installed on the rotating roller (6) through bolts. The two covers respectively abut against the two side positioning sleeves facing the two ends of the rotating roller (6).

10. A method for recycling building concrete aggregates, characterized in that, It includes: S1: Baking the aggregate in a rotary kiln; S2: Separating the crushed materials of the baked aggregate by a vibrating screen; S3: Mechanically damaging the sieved aggregate.

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