Concrete Recycling Equipment and Its Application in Road Construction

Abstract

The present invention discloses a concrete recycling device and its application in road construction, which relates to the technical field of road construction. The concrete recycling device includes a crushing assembly. The crushing assembly includes two groups of crushing shafts and two groups of fixed shafts. Arc-shaped blocks are fixedly connected to the right ends of the two groups of fixed shafts; sliding columns are slidably connected inside the two groups of crushing shafts. Air intake grooves are formed on the surfaces of the sliding columns, and exhaust ports are connected through the right ends of the sliding columns; an arc-shaped matching block is fixedly connected to the left end of the sliding column, and a first return spring is sleeved on the surface of the sliding column; the arc-shaped matching blocks in the crushing shafts cooperate with the arc-shaped blocks during rotation, and realize left-right reciprocating sliding through the action of the first return spring, so that the hot gas in the mixing tank circulates and heats the crushing shafts. The heated crushing shafts contact the concrete above to realize preheating, reduce the viscosity and make the concrete more brittle, reduce the wear of the crushing shafts during the crushing process, and improve the service life of the recycling device.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, specifically to concrete recycling equipment and its application in road construction. Background Art

[0002] With the increasing shortage of resources and social development, the recycling of waste concrete has become a solution for sustainable development, which can reduce the demand for new raw materials, lower costs, and reduce waste and environmental impacts.

[0003] With the continuous progress of technology, the technology of concrete recycling equipment has also been continuously improved and innovated. Modern recycling equipment can process waste concrete more efficiently, improve the quality and performance of recycled materials, and enable them to meet the requirements of various engineering applications;

[0004] Chinese Patent with application number CN202410797977.4 discloses a device for preparing recycled concrete from construction waste, including a first screening chamber, a first crushing chamber, a screening chute, a second screening chamber, a second crushing chamber, and two dust suction and feeding components; a feeding hopper is provided on the upper surface of the first screening chamber near the left end, and a first dust suction and feeding component is provided at the bottom of the first screening chamber; the right end of the first screening chamber is equipped with a first crushing chamber; a screening chute that is arranged to the right and slopes downward is provided at the bottom of the first crushing chamber, and a screening slide plate is arranged in the screening chute; a conveying belt is arranged in the second screening chamber, a blowing component is provided above the conveying belt in the second screening chamber, and a second dust suction and feeding component is provided at the bottom of the second screening chamber. The present invention can effectively separate soil impurities in recycled concrete, and through multiple crushing, meet the requirements of crushed particles. The dust generated during the screening process and the crushing process is effectively sucked away by the dust suction and feeding components, and there is basically no dust during the recycling process, and the environmental pollution during the recycling process is very small. However, during the use of this equipment, the waste materials are directly crushed, and long-term operation will cause wear of the crushing equipment, which is not conducive to the long-term operation of the recycling equipment.

[0005] Moreover, generally when recycling waste materials, some additives such as anti-aging agents and tackifiers need to be added to improve the performance of recycled concrete. In the prior art, the additives are directly added to the concrete and stirred, resulting in poor mixing effect, long cycle, and low working efficiency of the equipment; therefore, the present invention proposes a concrete recycling equipment and its application in road construction. Summary of the Invention

[0006] The purpose of the present invention is to provide a concrete recycling equipment and its application in road construction to solve the problems raised in the above background.

[0007] To achieve the above object, the present invention provides the following technical solution: a concrete regeneration device, comprising a base and a supporting frame, a crushing box is fixedly connected to the upper part of the supporting frame, and a crushing assembly for improving the crushing of concrete is arranged inside the crushing box;

[0008] The crushing assembly includes two groups of crushing shafts and two groups of fixed shafts, and the two groups of crushing shafts are rotatably sleeved on the surface of the fixed shaft in the corresponding group. One end of the two groups of fixed shafts is fixed to the surface of the supporting base, and the other end is fixedly connected with an arc block. The inside of the two groups of crushing shafts is slidably connected with a sliding column, and a plurality of air intake grooves are opened on the circumference of the end of the sliding column away from the fixed shaft, and a limiting plate is fixed at the end close to the air intake groove, and the other end of the sliding column is fixedly connected with an arc matching block, and the arc matching block is slidably connected to the arc block. A first return spring is also sleeved on the surface of the sliding column between the arc matching block and the limiting plate, and the end of the sliding column close to the air intake groove passes through the limiting plate and is connected to an exhaust port.

[0009] Preferably, the crushing assembly also includes a first motor, the output end of the first motor is fixedly connected to a driving shaft, the surface of the driving shaft is fixedly connected to a friction block, a transmission belt is wound around the driving shaft and the crushing shaft, the driving shaft drives the crushing shaft to rotate through the transmission belt, the end of the crushing shaft away from the transmission belt is fixedly connected to a driving gear, the inside of the crushing shaft is fixedly connected to a limiting block, and the two groups of crushing shafts are connected through two groups of driving gears in meshing transmission.

[0010] Preferably, a driven gear is transmission-connected below the left group of the two groups of driving gears, the surface of the driven gear is eccentrically connected to a driving rod, the driving rod is rotationally sleeved on the surface of a screen plate at one end away from the driven gear, the surface of the screen plate is fixedly connected to a first rotating shaft, the screen plate is rotated on the inner surface of a crushing box through the first rotating shaft, a first incomplete gear is fixedly connected to the surface of the screen plate near the first rotating shaft, a discharge plate is provided inside the crushing box, a second rotating shaft is fixedly connected to the surface of the discharge plate near the first rotating shaft just below the surface, a second incomplete gear is fixedly connected to the surface of the discharge plate near the second rotating shaft, and the first incomplete gear is meshingly connected to the second incomplete gear.

[0011] Preferably, a first grinding plate is slidably connected to one end of the screening plate, a second grinding plate is slidably connected to one end of the discharging plate, and the first grinding plate and the second grinding plate are vertically slidably arranged inside the crushing box.

[0012] Preferably, a stirring assembly for stirring concrete is arranged above the base. The stirring assembly includes a second motor, a transmission part is arranged at the output end of the second motor, two stirring shafts are fixedly arranged on the surface of the transmission part, the rotation directions of the two stirring shafts are opposite, and a plurality of filtering holes are formed inside both of them. Stirring blades are fixedly connected to the surface of the stirring shafts. One end of an exhaust pipe rotatably penetrates through the inside of the stirring shafts, and the other end of the exhaust pipe rotatably penetrates through the inside of a crushing shaft. The crushing shaft is in through connection with the exhaust pipe and a plurality of filtering holes; a cam is fixedly connected to the surface of one of the stirring shafts.

[0013] Preferably, a feeding assembly for automatically releasing additives is arranged on one side of the stirring assembly. The feeding assembly includes two additive tanks, the middle parts of the two additive tanks are connected by a hollow pipe, a sliding rod is slidably arranged inside the hollow pipe, a feeding groove is formed through the surface of the sliding rod, a compression spring is arranged at one end of the hollow pipe, the sliding rod is in intermittent frictional transmission with a friction block, and the lower ends of the two additive tanks are respectively in through connection with the two exhaust pipes.

[0014] Preferably, a protective housing, a stirring tank and a support housing are arranged above the base. A heater is arranged inside the stirring tank, a discharge port is arranged below the stirring tank, a feeding hopper is in through connection above the crushing tank, and a miscellaneous material tank is arranged below the crushing tank.

[0015] Preferably, a filter box is arranged inside the protective housing. Two air inlet pipes are in through connection with the surface of the filter box, and the two air inlet pipes are respectively in through connection with the surfaces of the two fixed shafts. A barrier net is arranged on the surface of the filter box to prevent the flying aggregate from entering the inside of the filter box during the stirring process. A filter net is movably arranged inside the filter box, and a dust discharge plate is rotatably connected to one side of the filter net below and close to the barrier net.

[0016] Preferably, a sliding plate is slidably connected below the filter box. The upper end of the sliding plate is in frictional connection with the filter net, the lower end of the sliding plate is in sliding connection with the cam, and a second return spring is arranged at the connection position between the sliding plate and the filter box.

[0017] An application of a concrete recycling device in road construction. Rollers are arranged below the base. After the surface of the concrete block is cleaned, it is put into the inside of the feeding hopper, and then it is crushed and preheated by a crushing assembly, stirred by the stirring assembly, and additives are automatically added intermittently during the stirring process. After the stirring is completed, the discharge port is opened to directly release the recycled concrete to the working area for use.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention drives the drive shaft to rotate by starting the first motor, and drives two sets of crushing shafts to rotate synchronously through a transmission belt for crushing operations; the arc-shaped mating blocks inside the crushing shafts cooperate with the arc-shaped blocks during rotation, and realize left and right reciprocating sliding through the action of the first return spring, so that the hot gas in the mixing tank circulates through the air inlet pipe, fixed shaft, sliding column, and exhaust pipe, and heats the crushing shafts. The heated crushing shafts contact the concrete above to realize preheating, reduce the wear of the crushing shafts during the crushing process, and improve the service life of the recycling equipment.

[0020] 2. The present invention drives the friction block to rotate by the first motor driving the drive shaft to rotate. The friction block intermittently frictions the sliding rod in the hollow pipe of the feeding assembly. The sliding rod slides left and right under the cooperation of the compression spring. When the feeding groove on the surface of the sliding rod aligns with the additive tank, the additive flows into the exhaust pipe; since the hot gas is in a pressurized state when circulating through the exhaust pipe with a smaller diameter, under the action of the hot gas pressure, the liquid additive is sprayed out in a mist, enters the inside of the mixing shaft and then is discharged through the filter holes to be mixed with the concrete being stirred. This method mixes more quickly and shortens the mixing cycle.

[0021] 3. The screening plate screens the dust and the concrete with smaller particle sizes during the crushing process to ensure the uniformity of the structure of the recycled concrete, improve the purity and quality of the recycled materials. The grinding plate appropriately grinds the concrete after preheating and crushing to remove some edges and corners, so that the recycled concrete can be directly put into use with better adhesion effect; the filter box filters the dust in the hot gas and performs secondary collection and filtration on the dust in the crushed concrete to avoid damage to relevant components caused by dust and improve the quality of the recycled concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the concrete recycling equipment;

[0023] Figure 2 It is a schematic diagram of the partial structure of the concrete recycling equipment;

[0024] Figure 3 It is a schematic diagram of the structure of the crushing assembly;

[0025] Figure 4 It is a schematic diagram of the internal structure of the crushing shaft;

[0026] Figure 5 It is a schematic diagram of the structure of the arc-shaped block and the arc-shaped mating block;

[0027] Figure 6 It is a schematic diagram of the internal structure of the crushing box;

[0028] Figure 7 For Figure 6 The partial enlarged view at A in

[0029] Figure 8Schematic diagram of the stirring assembly structure;

[0030] Figure 9 Schematic diagram of the blanking assembly structure;

[0031] Figure 10 Schematic diagram of the filter box structure;

[0032] In the figure: 1. Base; 11. Protective housing; 12. Stirring tank; 13. Support housing; 2. Support base frame; 21. Blanking hopper; 22. Crushing box; 23. Miscellaneous material box; 3. Crushing assembly; 31. First motor; 32. Drive shaft; 321. Friction block; 33. Transmission belt; 34. Crushing shaft; 341. Driving gear; 3411. Driven gear; 3412. Driving rod; 3413. Screening plate; 34131. First rotating shaft; 34132. First incomplete gear; 3414. Discharge plate; 34141. Second rotating shaft; 34142. Second incomplete gear; 3415. First grinding plate; 3416. Second grinding plate; 342. Limit block; 35. Fixed shaft; 351. Arc-shaped block; 36. Slide column; 361. Air inlet groove; 362. Exhaust port; 363. Arc-shaped mating block; 364. First return spring; 365. Limit plate; 4. Stirring assembly; 41. Second motor; 42. Transmission part; 43. Stirring shaft; 431. Cam; 44. Stirring blade; 45. Exhaust pipe; 5. Blanking assembly; 51. Additive tank; 52. Slide rod; 521. Blanking groove; 53. Compression spring; 6. Filter box; 61. Intake pipe; 62. Barrier net; 63. Filter net; 64. Slide plate; 65. Second return spring; 66. Dust discharge plate; 7. Heater. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0034] A concrete recycling device, as Figures 1 to 5 shown, includes a base 1 and a support base frame 2. Above the support base frame 2, a crushing box 22 is fixedly connected. Inside the crushing box 22, a crushing assembly 3 is provided for improving the crushing of concrete.

[0035] The crushing assembly 3 includes two groups of crushing shafts 34 and two groups of fixed shafts 35. The two groups of crushing shafts 34 are rotatably sleeved on the surface of the fixed shaft 35 in the corresponding group. One end of the two groups of fixed shafts 35 is fixed to the surface of the supporting base frame 2, and the other end is fixedly connected with an arc block 351. The inside of the two groups of crushing shafts 34 is slidably connected with a sliding column 36. The sliding column 36 is provided with a plurality of air inlet grooves 361 on the circumference of the end away from the fixed shaft 35, and a limit plate 36 is fixed on the end close to the air inlet groove 361. 5. The other end of the slide post 36 is fixedly connected with an arc-shaped matching block 363. One end of the slide post 36 close to the air inlet groove 361 passes through the limit plate 365 and is connected with the exhaust port 362. The arc-shaped matching block 363 is slidably connected with the arc block 351. A first return spring 364 is sleeved on the surface of the slide post 36 between the arc-shaped matching block 363 and the limit plate 365. The fixed shaft 35, the arc-shaped matching block 363, the limit plate 365 and the slide post 36 are all sealed with the inner wall of the crushing shaft 34.

[0036] The crushing assembly 3 also includes a first motor 31, the output end of the first motor 31 is fixedly connected to a driving shaft 32, the surface of the driving shaft 32 is fixedly connected to a friction block 321, a transmission belt 33 is wound around the driving shaft 32 and the crushing shaft 34, the driving shaft 32 drives the crushing shaft 34 to rotate through the transmission belt 33, the end of the crushing shaft 34 away from the transmission belt 33 is fixedly connected to a driving gear 341, the interior of the crushing shaft 34 is fixedly connected to a limiting block 342, and the two groups of crushing shafts 34 are connected through two groups of driving gears 341.

[0037] A stirring assembly 4 for stirring concrete is arranged above the base 1, and the stirring assembly 4 includes a second motor 41. A transmission part 42 is arranged at the output end of the second motor 41. Two groups of stirring shafts 43 are fixedly arranged on the surface of the transmission part 42. The two groups of stirring shafts 43 rotate in opposite directions and are provided with a plurality of filter holes inside. A stirring blade 44 is fixedly connected to the surface of the stirring shaft 43. The inside of the stirring shaft 43 is rotatably penetrated through one end of an exhaust pipe 45. The other end of the exhaust pipe 45 is rotatably penetrated through the inside of a crushing shaft 34. The crushing shaft 34 is connected to the exhaust pipe 45 and the plurality of filter holes. A cam 431 is fixedly connected to the surface of one group of stirring shafts 43.

[0038] Two groups of air inlet pipes 61 are connected through the surface of the filter box 6 , and the two groups of air inlet pipes 61 are connected through the surfaces of the two groups of fixed shafts 35 , respectively.

[0039] A heater 7 is provided inside the mixing box 12 .

[0040] In the specific implementation process, first, turn on the heater 7. The heater 7 heats the inside of the mixing tank 12, so that the crushed concrete is mixed with the additive in an environment of a relatively high temperature, reducing the aging and hardening of the concrete and making it easier to be recycled. Put the concrete obtained at the construction site into the hopper 21 of the recycling equipment, and start the first motor 31 and the second motor 41 respectively.

[0041] After the first motor 31 is started, its output end drives the drive shaft 32 to rotate. The drive shaft 32 drives a group of crushing shafts 34 to rotate through the transmission belt 33. The group of crushing shafts 34 is in meshing transmission with the driving gear 341 of another group of crushing shafts 34 through the driving gear 341 at the other end thereof. Then, the two groups of crushing shafts 34 rotate to realize the crushing operation of the concrete.

[0042] During the rotation of the crushing shaft 34, the sliding column 36 is clamped by the limiting block 342 inside it, so as to control the synchronous rotation of the sliding column 36. During the rotation of the sliding column 36, the arc-shaped matching block 363 is driven to rotate closely against the surface of the arc-shaped block 351. Since its surface is symmetrically concave and convex, and the arc-shaped block 351 is always in a static state, during the rotation, the sliding column 36 realizes the effect of reciprocating left and right sliding inside the crushing shaft 34 through the cooperation with the first return spring 364.

[0043] At the same time, the fixed shaft 35 and the sliding column 36 are connected through and through. The fixed shaft 35 is connected through and through with the air inlet pipe 61, the sliding column 36 is connected through and through with the exhaust pipe 45, and one-way valves are arranged inside the exhaust port 362 and the fixed shaft 35. When the sliding column 36 slides to the right, the hot gas inside the mixing tank 12 enters the inside of the fixed shaft 35 through the air inlet pipe 61, then enters the inside of the sliding column 36 through the fixed shaft 35, and is discharged through the air inlet groove 361. At this time, the one-way valve inside the exhaust port 362 is in a closed state. When the sliding column 36 is reset to the left through the first return spring 364, the one-way valve inside the fixed shaft 35 is closed, and the one-way valve inside the exhaust port 362 is opened. Then, the gas is discharged through the exhaust port 362, and the discharged gas flows into the inside of the mixing tank 12 again through the exhaust pipe 45. Then, the circulation of the hot gas inside the mixing tank 12 is realized, and the heating efficiency of the concrete is improved.

[0044] During the hot gas circulation process, the heating effect on the crushing shaft 34 is realized. The crushing shaft 34 preheats the concrete above it. The preheated concrete has plasticity, and at the same time reduces the viscosity of the concrete, making it easier to flow and break. During the breaking process, the wear of the concrete on the crushing shaft 34 can be reduced, and the service life of the recycling equipment is improved. Embodiment 2

[0045] Such as Figure 6 And Figure 7As shown in the figure, a driven gear 3411 is drivingly connected below the left group of two groups of driving gears 341. An eccentric rotating connection is provided on the surface of the driven gear 3411 with a driving rod 3412. One end of the driving rod 3412 away from the driven gear 3411 is rotatably sleeved on the surface of a screening plate 3413. A first rotating shaft 34131 is fixedly connected to the surface of the screening plate 3413. The screening plate 3413 rotates on the inner surface of the crushing box 22 through the first rotating shaft 34131. A first incomplete gear 34132 is fixedly connected to the surface of the screening plate 3413 near the first rotating shaft 34131. A discharge plate 3414 is arranged inside the crushing box 22. A second rotating shaft 34141 is fixedly connected to the surface of the discharge plate 3414 near the exact lower position of the first rotating shaft 34131. A second incomplete gear 34142 is fixedly connected to the surface of the discharge plate 3414 near the second rotating shaft 34141. The first incomplete gear 34132 is meshingly connected with the second incomplete gear 34142.

[0046] One end of the screening plate 3413 is slidably clamped with a first grinding plate 3415. One end of the discharge plate 3414 is slidably clamped with a second grinding plate 3416. The first grinding plate 3415 and the second grinding plate 3416 are vertically slidably arranged inside the crushing box 22.

[0047] In the specific implementation process, the rotation of the driving gear 341 drives the screening plate 3413 to rotate around the rotating shaft through the driven gear 3411. Since the convex block is eccentrically arranged with the driven gear 3411, the reciprocating swinging effect of the screening plate 3413 is realized, and the dust or the concrete with smaller particle size generated during the crushing process can be screened, ensuring the uniformity of the structure of the recycled concrete, thereby improving the purity and quality of the recycled materials.

[0048] A discharge plate 3414 is arranged below the screening plate 3413 for discharging the screened dust. They are meshingly connected through the first incomplete gear 34132 and the second incomplete gear 34142. When the screening plate 3413 swings through the first rotating shaft 34131, the discharge plate 3414 will perform a relative cross-opening and closing movement through the second rotating shaft 34141, which can improve the discharge work of the dust falling on the surface of the discharge plate 3414.

[0049] Furthermore, when it performs a relative opening movement, the screening plate 3413 controls the first grinding plate 3415 to move downward, while the discharge plate 3414 controls the second grinding plate 3416 to move upward. When it performs a relative closing movement, the situation is opposite. During this process, the first grinding plate 3415 and the second grinding plate 3416 appropriately grind the preheated and crushed concrete to remove some edges and corners, so that the recycled concrete can be directly put in, ensuring a better adhesion effect between them. Embodiment 3

[0050] On one side of the stirring assembly 4, there is a blanking assembly 5 for automatically releasing additives. The blanking assembly 5 includes two groups of additive tanks 51. The middle parts of the two groups of additive tanks 51 are connected by a hollow pipe. A sliding rod 52 is slidably arranged inside the hollow pipe. A blanking groove 521 is formed through the surface of the sliding rod 52. One end of the hollow pipe is provided with a compression spring 53. The sliding rod 52 is intermittently friction-driven with the friction block 321. The lower ends of the two groups of additive tanks 51 are respectively and correspondingly connected to the two exhaust pipes 45 through holes.

[0051] When the drive shaft 32 rotates to drive the friction block 321 to rotate synchronously, the friction block 321 intermittently frictions the sliding rod 52, so that the sliding rod 52 reciprocates left and right inside the hollow pipe under the cooperation of the compression spring 53. When the blanking groove 521 aligns with the additive tank 51, the liquid additive inside the additive tank 51 flows into the inside of the exhaust pipe 45. The liquid additives are mainly anti-aging agents and tackifiers, etc.

[0052] Furthermore, since the hot air passes through the inside of the exhaust pipe 45 during circulation, when the additives enter the inside of the exhaust pipe 45 at the same time, the additives can be discharged into the inside of the stirring shaft 43 through the gas, and then discharged through the filter holes on its surface to be stirred with the concrete.

[0053] Even further, the diameter of the exhaust pipe 45 is smaller than the diameter of the intake pipe 61. Then the hot air is in a pressurized state when flowing inside the exhaust pipe 45. Also, due to the small diameter of the filter holes, the liquid additives will be sprayed in a mist shape, which can be mixed with the concrete during the stirring process more quickly and shorten the stirring cycle. Example 4

[0054] As Figure 10 shown, a barrier net 62 is provided on the surface of the filter box 6 to prevent the flying aggregates from entering the inside of the filter box 6 during the stirring process. A filter net 63 is movably arranged inside the filter box 6. A dust discharge plate 66 is rotatably connected to one side of the filter net 63 below and close to the barrier net 62.

[0055] A sliding plate 64 is slidably connected below the filter box 6. The upper end of the sliding plate 64 is friction-connected to the filter net 63. The lower end of the sliding plate 64 is slidably connected to the cam 431. A second return spring 65 is arranged at the connection between the sliding plate 64 and the filter box 6.

[0056] When the stirring shaft 43 rotates to drive the cam 431 to rotate, the cam 431 intermittently presses the lower end of the slide plate 64, causing the upper end of the slide plate 64 to engage and slide with the surface of the filter screen 63. The filter screen 63 is movably connected to the filter box 6 in a small range, thus achieving the vibration or jitter effect of the filter screen 63. During the hot air circulation process, the filter screen 63 filters the dust in the gas. When vibrating, the dust on its surface can be shaken off and then discharged through the dust discharge plate 66, preventing dust from entering the inside of the crushing shaft 34 and damaging related components. At the same time, the dust in the crushed concrete is collected and filtered twice, improving the quality of the recycled concrete.

[0057] The application of the above embodiment in road construction is as follows: rollers are arranged under the base 1. After cleaning the surface of the concrete block, it is placed inside the feeding hopper 21, and then crushed and preheated by the crushing assembly 3, and stirred by the stirring assembly 4. During the stirring process, additives are automatically added intermittently. After the stirring is completed, the discharge port is opened to directly release the recycled concrete to the working area for use.

[0058] The above embodiments only represent the implementation modes of the present invention and should not be construed as limiting the scope of the invention patent, nor imposing any formal limitations on the structure of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A concrete recycling device, comprising a base and a support frame. A crushing box is fixedly connected above the support frame, characterized in that: Inside the crushing box, a crushing component is provided for enhancing the crushing of concrete; The crushing component includes two groups of crushing shafts and two groups of fixed shafts. The two groups of crushing shafts are rotatably sleeved on the surfaces of the fixed shafts in their corresponding groups. One ends of the two groups of fixed shafts are fixed on the surface of the support base frame, and the other ends are fixedly connected with arc-shaped blocks. Inside each of the two groups of crushing shafts, a sliding column is slidably connected. A plurality of air inlet grooves are formed on the circumferential side of the end of the sliding column away from the fixed shaft, and a limiting plate is fixed at one end close to the air inlet groove. The other end of the sliding column is fixedly connected with an arc-shaped matching block, which is slidably connected with the arc-shaped block. A first return spring is also sleeved on the surface of the sliding column between the arc-shaped matching block and the limiting plate. One end of the sliding column close to the air inlet groove penetrates through the limiting plate and is connected with an exhaust port; Above the base, a stirring component for stirring concrete is provided. The stirring component includes a second motor, and a transmission part is arranged at the output end of the second motor. Two groups of stirring shafts are fixedly arranged on the surface of the transmission part. The rotation directions of the two groups of stirring shafts are opposite, and a plurality of filtering holes are formed inside each of them. Stirring blades are fixedly connected to the surfaces of the stirring shafts. One end of an exhaust pipe is rotatably penetrated through the inside of the stirring shaft, and the other end of the exhaust pipe is rotatably penetrated through the inside of the crushing shaft. The crushing shaft is in through connection with the exhaust pipe and a plurality of filtering holes; During the rotation of the sliding column, the arc-shaped matching block is driven to rotate closely against the surface of the arc-shaped block. Since its surface is symmetrically concave and convex, and the arc-shaped block is always stationary, the sliding column reciprocates left and right inside the crushing shaft through the cooperation with the first return spring during the rotation; Meanwhile, the fixed shaft and the sliding column are in through connection, the fixed shaft is in through connection with the air inlet pipe, the sliding column is in through connection with the exhaust pipe, and one-way valves are arranged inside the exhaust port and the fixed shaft; when the sliding column slides to the right, the hot gas inside the stirring box enters the inside of the fixed shaft through the air inlet pipe, then enters the inside of the sliding column through the fixed shaft, and is discharged through the air inlet groove. At this time, the one-way valve inside the exhaust port is in a closed state; when the sliding column is reset to the left by the first return spring, the one-way valve inside the fixed shaft is closed, and the one-way valve inside the exhaust port is opened, then the gas is discharged through the exhaust port, and the discharged gas flows back into the inside of the stirring box through the exhaust pipe again, thus realizing the circulation of the hot gas inside the stirring box.

2. The concrete recycling equipment according to claim 1, characterized in that: The crushing component further includes a first motor, and a driving shaft is fixedly connected to the output end of the first motor. A friction block is fixedly connected to the surface of the driving shaft. A transmission belt is wound around between the driving shaft and the crushing shaft. The driving shaft drives the crushing shaft to rotate through the transmission belt. A driving gear is fixedly connected to the end of the crushing shaft away from the transmission belt. A limiting block is fixedly connected inside the crushing shaft. The two groups of crushing shafts are in meshing transmission connection through the two groups of driving gears.

3. The concrete recycling equipment according to claim 2, characterized in that: Below the left set of the two sets of the driving gears, a driven gear is drivingly connected. An actuating rod is eccentrically rotatably connected to the surface of the driven gear. One end of the actuating rod away from the driven gear is rotatably sleeved on the surface of a screening plate. A first rotating shaft is fixedly connected to the surface of the screening plate. The screening plate rotates on the inner surface of a crushing box through the first rotating shaft. A first incomplete gear is fixedly connected to the surface of the screening plate near the first rotating shaft. A discharge plate is arranged inside the crushing box. A second rotating shaft is fixedly connected to the surface of the discharge plate directly below the first rotating shaft. A second incomplete gear is fixedly connected to the surface of the discharge plate near the second rotating shaft. The first incomplete gear is meshed with the second incomplete gear.

4. The concrete recycling equipment according to claim 3, characterized in that: A first grinding plate is slidably clamped at one end of the screening plate. A second grinding plate is slidably clamped at one end of the discharge plate. The first grinding plate and the second grinding plate are perpendicularly and slidably arranged inside the crushing box.

5. The concrete recycling equipment according to claim 1, characterized in that: A cam is fixedly connected to the surface of one of the stirring shafts.

6. The concrete recycling equipment according to claim 5, characterized in that: A blanking assembly for automatically releasing an additive is arranged on one side of the stirring assembly. The blanking assembly includes two additive tanks. The middle parts of the two additive tanks are connected by a hollow tube. A sliding rod is slidably arranged inside the hollow tube. A blanking groove is formed through the surface of the sliding rod. A compression spring is arranged at one end of the hollow tube. The sliding rod is intermittently frictionally driven with a friction block. The lower ends of the two additive tanks are respectively and correspondingly connected to two exhaust pipes through holes.

7. The concrete recycling equipment according to claim 5, characterized in that: Above the base, a protective housing, a mixing tank and a support housing are arranged. A heater is arranged inside the mixing tank. A discharge opening is arranged below the mixing tank. A feed hopper is connected through the upper part of the crushing box. A miscellaneous material box is arranged below the crushing box.

8. The concrete recycling equipment according to claim 7, characterized in that: A filter box is arranged inside the protective housing. Two intake pipes are connected through the surface of the filter box. The two intake pipes are respectively and correspondingly connected through the surfaces of two fixed shafts. A barrier net is arranged on the surface of the filter box to prevent the aggregate splashed during the stirring process from entering the inside of the filter box. A filter net is movably arranged inside the filter box. A dust discharge plate is rotatably connected to one side of the filter net below and near the barrier net.

9. The concrete recycling equipment according to claim 8, characterized in that: A sliding plate is slidably connected below the filter box. The upper end of the sliding plate is frictionally connected to the filter net. The lower end of the sliding plate is slidably connected to the cam. A second return spring is arranged at the connection between the sliding plate and the filter box.

10. Application of a concrete recycling device in road construction, using the concrete recycling device in claim 9, characterized in that: Rollers are arranged below the base. After the surface of the concrete block is cleaned, it is placed inside the feed hopper, and then is crushed and preheated by the crushing assembly, and is stirred by the stirring assembly. The additive is automatically and intermittently added during the stirring process. After the stirring is completed, the discharge opening is opened to directly release the recycled concrete to the working area for use.

Images