Concrete regeneration equipment and application thereof in road construction

Abstract

The invention discloses concrete regeneration equipment and application in road construction, and relates to the technical field of road construction, the concrete regeneration equipment comprises a crushing assembly, the crushing assembly comprises two groups of crushing shafts and two groups of fixing shafts, and the right ends of the two groups of fixing shafts are fixedly connected with arc-shaped blocks; sliding columns are slidably connected into the two crushing shafts, air inlet grooves are formed in the surfaces of the sliding columns, and the right ends of the sliding columns are in through connection with exhaust ports. The left end of the sliding column is fixedly connected with an arc-shaped matching block, and the surface of the sliding column is sleeved with a first reset spring. An arc-shaped matching block in the crushing shaft is matched with an arc-shaped block during rotation and slides left and right in a reciprocating manner under the action of a first reset spring, so that hot gas in the stirring box circularly flows and heats the crushing shaft, and the heated crushing shaft is in contact with concrete above so as to realize preheating and viscosity reduction, and the concrete has higher brittleness; and in the crushing process, abrasion to the crushing shaft is reduced, and the service life of regeneration equipment is prolonged.

Description

Technical Field

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

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

[0003] With the continuous advancement of science and technology, the technology of concrete recycling equipment is also constantly improving and innovating. 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; The Chinese patent application number CN202410797977.4 discloses a construction waste recycled concrete preparation device, 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 material separation components; the upper surface of the first screening chamber is provided with a feeding hopper near the left end, and the bottom of the first screening chamber is provided with a first dust suction and material separation component; the right end of the first screening chamber is installed with a first crushing chamber; the bottom of the first crushing chamber is provided with a screening chute set to the right and inclined downward, and a screening slide plate is provided in the screening chute; a conveying belt is provided 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 material separation component is provided at the bottom of the second screening chamber. The present invention can effectively separate soil impurities in recycled concrete, and then meet the crushing particle requirements through multiple crushing. The dust generated in the screening process and the crushing process is effectively sucked away by the dust suction and material separation component, and the recycling process is basically dust-free, and the recycling process has little environmental pollution. However, during use, the equipment directly crushes the waste materials, and long-term operation will cause wear of the crushing equipment, which is not conducive to the long-term operation of the regeneration equipment.

[0004] Moreover, generally when recycling waste materials, it is necessary to add some additives such as anti-aging agents and viscosity enhancers to improve the performance of recycled concrete. In the prior art, additives are directly added to concrete and stirred, which has poor mixing effect and long cycle, resulting in poor equipment working efficiency and other problems. Therefore, the present invention proposes concrete recycling equipment and its application in road construction. Summary of the invention

[0005] The object of the present invention is to provide a concrete recycling device and its application in road construction to solve the problems raised in the above background.

[0006] 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; The crushing assembly includes two groups of crushing shafts and two groups of fixed shafts, 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, 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, the other end of the sliding column is fixedly connected with an arc matching block, the arc matching block is slidably connected to the arc block, and 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 air outlet pipe.

[0007] 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 conveyor 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.

[0008] 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.

[0009] 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.

[0010] 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 groups of stirring shafts are fixedly arranged on the surface of the transmission part, the two groups of stirring shafts have opposite rotation directions, and a plurality of filter holes are opened inside them, stirring blades are fixedly connected to the surface of the stirring shaft, the interior of the stirring shaft is rotatably penetrated through one end of the exhaust pipe, and the other end of the exhaust pipe is rotatably penetrated through the interior of the crushing shaft, and the crushing shaft is through-connected with the exhaust pipe and the plurality of filter holes; a cam is fixedly connected to the surface of one group of the stirring shafts.

[0011] Preferably, a feeding assembly for automatically releasing additives is provided on one side of the stirring assembly, and the feeding assembly includes two groups of additive tanks, the middle parts of the two groups of additive tanks are connected by a hollow tube, a sliding rod is slidably provided inside the hollow tube, a feeding trough is provided on the surface of the sliding rod, a compression spring is provided at one end of the hollow tube, the sliding rod and the friction block are intermittently frictionally transmitted, and the lower ends of the two groups of additive tanks are respectively connected with the two groups of exhaust pipes.

[0012] Preferably, a protective shell, a mixing box and a supporting shell are provided above the base, a heater is provided inside the mixing box, a discharge port is provided below the mixing box, a lower hopper is connected through the top of the crushing box, and a miscellaneous material box is provided below the crushing box.

[0013] Preferably, a filter box is provided inside the protective shell, and two groups of air inlet pipes are connected through the surface of the filter box, and the two groups of air inlet pipes are respectively connected to the surfaces of two groups of fixed shafts. A barrier net is provided on the surface of the filter box to prevent splashed aggregates from entering the filter box during stirring. A filter net is movably provided inside the filter box, and a dust exhaust plate is rotatably connected to the side of the barrier net below the filter net.

[0014] Preferably, a slide plate is slidably connected to the bottom of the filter box, the upper end of the slide plate is frictionally connected to the barrier net, the lower end of the slide plate is slidably connected to the cam, and a second return spring is provided at the connection between the slide plate and the filter box.

[0015] A concrete recycling device is used in road construction. A roller is arranged under the base. The surface of the concrete block is cleaned and placed in a lower hopper. The concrete block is crushed and preheated by a crushing component. The concrete block is stirred by a stirring component. Additives are automatically added intermittently during the stirring process. After the stirring is completed, a discharge port is opened to directly release the recycled concrete to the working area for use.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention starts the first motor to drive the driving shaft to rotate, and the transmission belt is used to make the two groups of crushing shafts rotate synchronously to perform crushing operations; the arc-shaped matching block in the crushing shaft cooperates with the arc-shaped block during rotation, and realizes left-right reciprocating sliding through the action of the first return spring, so that the hot gas in the mixing box circulates through the air intake pipe, the fixed shaft, the sliding column, and the exhaust pipe, and heats the crushing shaft. The heated crushing shaft contacts the upper concrete to achieve preheating, reduce viscosity and make the concrete more brittle, reduce wear on the crushing shaft during the crushing process, and increase the service life of the regeneration equipment.

[0017] 2. The present invention drives the driving shaft to rotate by the first motor to rotate the friction block. The friction block intermittently rubs the slide bar in the hollow tube of the material discharge assembly. The slide bar slides left and right under the cooperation of the compression spring. When the material discharge groove on the surface of the slide bar is aligned with the additive tank, the additive flows into the exhaust pipe. Since the hot air is in a pressurized state when circulating through the exhaust pipe with a smaller diameter, the liquid additive is sprayed out in a mist state under the action of the hot air pressure, enters the inside of the stirring shaft, and is discharged through the filter hole to mix with the concrete being stirred. This method mixes faster and shortens the stirring cycle.

[0018] 3. The screening plate is used to screen the dust and concrete with smaller particles in the crushing process to ensure the uniformity of the recycled concrete structure and improve the purity and quality of the recycled materials. The preheated and crushed concrete is properly polished by the grinding plate to remove some edges and corners so that the recycled concrete can be directly put into use with better adhesion. The filter box filters the dust in the hot air and collects and filters the dust in the crushed concrete for a second time to prevent the dust from damaging the relevant components and improve the quality of the recycled concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the concrete recycling equipment; Figure 2 It is a schematic diagram of the local structure of the concrete recycling equipment; Figure 3 This is a schematic diagram of the crushing component structure; Figure 4 This is a schematic diagram of the internal structure of the crushing shaft; Figure 5 It is a schematic diagram of the structure of the arc block and the arc matching block; Figure 6 This is a schematic diagram of the internal structure of the crushing box; Figure 7 for Figure 6 A partial enlarged view of the middle part; Figure 8 It is a schematic diagram of the stirring component structure; Fig. 9 It is a schematic diagram of the structure of the blanking component; Fig.10It is a schematic diagram of the filter box structure; In the figure: 1, base; 11, protective shell; 12, mixing box; 13, support shell; 2, support base; 21, lower hopper; 22, crushing box; 23, sundry material box; 3, crushing assembly; 31, first motor; 32, driving 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 block; 36, slide column; 361, air inlet groove; 362, exhaust port; 363, arc matching 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, feeding assembly; 51, additive tank; 52, slide bar; 521, feeding trough; 53, compression spring; 6, filter box; 61, air inlet pipe; 62, barrier net; 63, filter net; 64, slide plate; 65, second return spring; 66, dust removal plate; 7, heater. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention. Example 1 A concrete recycling device, such as Figures 1 to 5 As shown, it comprises a base 1 and a supporting frame 2, a crushing box 22 is fixedly connected to the upper part of the supporting frame 2, and a crushing assembly 3 for improving the crushing of concrete is arranged inside the crushing box 22; 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 sliding column 36 is fixedly connected with an arc-shaped matching block 363. One end of the sliding column 36 close to the air inlet groove 361 passes through the limiting plate 365 and is connected with the air outlet pipe 362. The arc-shaped matching block 363 is slidably connected with the arc block 351. The surface of the sliding column 36 is also sleeved with a first return spring 364 between the arc-shaped matching block 363 and the limiting plate 365. The fixed shaft 35, the arc-shaped matching block 363, the limiting plate 365 and the sliding column 36 are all sealed with the inner wall of the crushing shaft 34.

[0021] 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 conveyor 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.

[0022] 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.

[0023] 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.

[0024] A heater 7 is provided inside the mixing box 12 .

[0025] During the specific implementation process, the heater 7 is first turned on to heat the interior of the mixing box 12, so that the crushed concrete is mixed with the additives in a higher temperature environment, reducing the aging and hardening of the concrete and making it easier to be recycled; the concrete obtained at the construction site is placed in the lower hopper 21 in the regeneration equipment, and the first motor 31 and the second motor 41 are started respectively.

[0026] After the first motor 31 is started, the output end thereof drives the driving shaft 32 to rotate. The driving shaft 32 drives a group of crushing shafts 34 to rotate through the transmission belt 33. The driving gear 341 at the other end of the group of crushing shafts 34 meshes with the driving gear 341 in another group of crushing shafts 34. Then, the two groups of crushing shafts 34 rotate to realize the crushing operation of concrete.

[0027] During the rotation of the crushing shaft 34, the sliding column 36 is clamped by the limit block 342 inside it, so that the sliding column 36 is controlled to rotate synchronously. During the rotation of the sliding column 36, the arc-shaped matching block 363 is driven to rotate close to the surface of the arc block 351. Since its surface is symmetrically concave and convex, and the arc block 351 is always in a stationary state, during the rotation process, the sliding column 36 cooperates with the first return spring 364 to achieve the effect of reciprocating left and right sliding inside the crushing shaft 34.

[0028] At the same time, the fixed shaft 35 and the sliding column 36 are connected in a through-connection manner, the fixed shaft 35 is connected in a through-connection manner with the air inlet pipe 61, the sliding column 36 is connected in a through-connection manner with the exhaust pipe 45, and a one-way valve is provided 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 box 12 enters the interior of the fixed shaft 35 through the air inlet pipe 61, and then enters the interior of the sliding column 36 through the fixed shaft 35, and is discharged through the air inlet groove 361, at which 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 by the first reset 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 exhausted gas flows into the interior of the mixing box 12 again through the exhaust pipe 45, thereby realizing the circulation of the hot gas inside the mixing box 12 and improving the efficiency of heating the concrete.

[0029] During the hot air circulation process, the crushing shaft 34 is heated, and 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 crush. The preheated concrete is more brittle. During the crushing process, the wear of the concrete on the crushing shaft 34 can be reduced, thereby increasing the service life of the regeneration equipment.

[0030] Example 2 like Figure 6 and Figure 7As shown, the left side of the two sets of driving gears 341 is connected to the driven gear 3411 below, and the surface of the driven gear 3411 is eccentrically connected to the driving rod 3412, and the end of the driving rod 3412 away from the driven gear 3411 is rotatably sleeved on the surface of the screening plate 3413, and the surface of the screening plate 3413 is fixedly connected to the first rotating shaft 34131, and the screening plate 3413 is rotated on the inner surface of the crushing box 22 through the first rotating shaft 34131, and the screening plate 3413 is rotated on the inner surface of the crushing box 22. A first incomplete gear 34132 is fixedly connected to the surface 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 just below 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, and the first incomplete gear 34132 is meshingly connected with the second incomplete gear 34142.

[0031] One end of the screening plate 3413 is slidably connected to the first grinding plate 3415 , and one end of the discharging plate 3414 is slidably connected to the second grinding plate 3416 . The first grinding plate 3415 and the second grinding plate 3416 are vertically slidably arranged inside the crushing box 22 .

[0032] During the specific implementation process, the driving gear 341 rotates through the driven gear 3411 to drive the screening plate 3413 to rotate around the rotating shaft. Since the protrusion and the driven gear 3411 are eccentrically arranged, the screening plate 3413 can achieve a reciprocating swing effect, which can screen the dust or smaller-sized concrete generated in the crushing process, ensure the uniformity of the recycled concrete structure, and thus improve the purity and quality of the recycled materials.

[0033] A discharge plate 3414 is provided below the screening plate 3413 for discharging dust after screening, and is meshingly connected therebetween via a first incomplete gear 34132 and a 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 motion with it through the second rotating shaft 34141, thereby improving the discharge of dust falling on the surface of the discharge plate 3414.

[0034] Furthermore, when they perform a relative opening movement, the screening plate 3413 controls the first grinding plate 3415 to move downward, and the discharge plate 3414 controls the second grinding plate 3416 to move upward, and the opposite is true when they perform a relative closing movement. In this process, the preheated and crushed concrete is properly ground by the first grinding plate 3415 and the second grinding plate 3416 to remove some edges and corners, so that the recycled concrete can be directly put in to ensure better adhesion between them.

[0035] Example 3 A feeding assembly 5 for automatically releasing additives is provided on one side of the stirring assembly 4. The feeding 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 tube. A slide rod 52 is slidably provided inside the hollow tube. A feeding trough 521 is provided on the surface of the slide rod 52. A compression spring 53 is provided at one end of the hollow tube. The slide rod 52 and the friction block 321 are intermittently frictionally transmitted. The lower ends of the two groups of additive tanks 51 are respectively connected with the two groups of exhaust pipes 45.

[0036] When the driving shaft 32 rotates and drives the friction block 321 to rotate synchronously, the friction block 321 intermittently rubs the slide bar 52, so that the slide bar 52 slides back and forth inside the hollow tube with the cooperation of the compression spring 53. When the lower chute 521 is aligned with the additive tank 51, the liquid additive inside the additive tank 51 flows into the exhaust pipe 45. The liquid additive is mainly an anti-aging agent and a viscosity enhancer. Furthermore, since the hot gas passes through the exhaust pipe 45 during circulation, when the additive simultaneously enters the exhaust pipe 45, the additive can be discharged into the stirring shaft 43 through the gas, and then discharged through the filter holes on its surface to be mixed with the concrete; Furthermore, the diameter of the exhaust pipe 45 is smaller than the diameter of the intake pipe 61, so the hot air is in a pressurized state when flowing inside the exhaust pipe 45. Since the diameter of the filter hole is small, the liquid additive will be sprayed out in a mist form, which can be mixed with the concrete in the mixing process more quickly, shortening the mixing cycle.

[0037] Example 4 like Fig.10 As shown, a barrier net 62 is provided on the surface of the filter box 6 to prevent splashed aggregate from entering the filter box 6 during stirring. A filter net 63 is movably provided inside the filter box 6, and a dust exhaust plate 66 is rotatably connected to one side of the barrier net 62 below the filter net 63.

[0038] A slide plate 64 is slidably connected to the bottom of the filter box 6 , the upper end of the slide plate 64 is frictionally connected to the barrier net 62 , the lower end of the slide plate 64 is slidably connected to the cam 431 , and a second return spring 65 is provided at the connection between the slide plate 64 and the filter box 6 .

[0039] When the stirring shaft 43 rotates and drives the cam 431 to rotate, the cam 431 intermittently squeezes the lower end of the slide plate 64, so that the upper end of the slide plate 64 engages and slides with the surface of the filter screen 63, and the filter screen 63 is directly and movably connected to the filter box 6 in a small range, thereby realizing the vibration or shaking effect of the filter screen 63. During the hot air circulation process, the filter screen 63 filters the dust in the gas, and can shake off the dust on its surface when shaking, and then discharge it through the dust exhaust plate 66, so as to prevent the dust from entering the crushing shaft 34 and causing damage to related components. At the same time, the dust in the crushed concrete is secondary collected and filtered to improve the quality of the recycled concrete.

[0040] The above embodiment is applied in road construction by arranging a roller under the base 1, cleaning the surface of the concrete block and placing it in the lower hopper 21, crushing and preheating it through the crushing component 3, stirring it through the stirring component 4, and automatically adding additives intermittently during the stirring process. After the stirring is completed, the discharge port is opened to release the recycled concrete directly to the working area for use.

[0041] The above-mentioned embodiments only express the implementation methods of the present invention, and cannot be understood as limiting the scope of the invention patent, nor is it any form of limitation on the structure of the present invention. It should be pointed out that for ordinary technicians in this field, several changes and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A concrete recycling device, comprising a base and a supporting frame, wherein a crushing box is fixedly connected to the upper part of the supporting frame, characterized in that: The interior of the crushing box is provided with a crushing assembly for improving the crushing of concrete; The crushing assembly includes two groups of crushing shafts and two groups of fixed shafts, 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, 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, the other end of the sliding column is fixedly connected with an arc matching block, the arc matching block is slidably connected to the arc block, and 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 air outlet pipe.

2. The concrete regeneration equipment according to claim 1, characterized in that: 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 conveyor belt is fixedly connected to a driving gear, the interior 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.

3. The concrete regeneration equipment according to claim 2, characterized in that: A driven gear is transmission-connected below the left group of the two groups of driving gears, and the surface of the driven gear is eccentrically connected to a driving rod, and the driving rod is rotatably sleeved on the surface of a screen plate at one end away from the driven gear, and the surface of the screen plate is fixedly connected to a first rotating shaft, and the screen plate is rotated on the inner surface of the crushing box through the first rotating shaft, and a first incomplete gear is fixedly connected to the surface of the screen plate near the first rotating shaft, and a discharge plate is provided inside the crushing box, and a second rotating shaft is fixedly connected to the surface of the discharge plate near the first rotating shaft just below the surface, and 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 with the second incomplete gear.

4. The concrete regeneration equipment according to claim 3, characterized in that: One end of the screening plate is slidably connected with a first grinding plate, and one end of the discharging plate is slidably connected with a second grinding plate. The first grinding plate and the second grinding plate are vertically slidably arranged inside the crushing box.

5. The concrete regeneration equipment according to claim 1, characterized in that: A stirring assembly for stirring concrete is arranged above the base, and the stirring assembly includes a second motor, and a transmission part is arranged at the output end of the second motor, and two groups of stirring shafts are fixedly arranged on the surface of the transmission part, and the two groups of stirring shafts rotate in opposite directions and are provided with a plurality of filter holes inside, and stirring blades are fixedly connected to the surface of the stirring shaft, and the inside of the stirring shaft is rotatably penetrated through one end of the exhaust pipe, and the other end of the exhaust pipe is rotatably penetrated through the inside of the crushing shaft, and the crushing shaft is connected with the exhaust pipe and the plurality of filter holes; a cam is fixedly connected to the surface of one group of the stirring shafts.

6. The concrete regeneration equipment according to claim 5, characterized in that: A feeding assembly for automatically releasing additives is provided on one side of the stirring assembly, and the feeding assembly includes two groups of additive tanks, the middle parts of the two groups of additive tanks are connected by a hollow tube, a sliding rod is slidably provided inside the hollow tube, a feeding trough is provided on the surface of the sliding rod, a compression spring is provided at one end of the hollow tube, the sliding rod and the friction block are intermittently frictionally transmitted, and the lower ends of the two groups of additive tanks are respectively connected with the two groups of exhaust pipes.

7. The concrete regeneration equipment according to claim 5, characterized in that: A protective shell, a mixing box and a supporting shell are arranged above the base, a heater is arranged inside the mixing box, a discharge port is arranged below the mixing box, a lower hopper is connected through the top of the crushing box, and a miscellaneous material box is arranged below the crushing box.

8. The concrete regeneration equipment according to claim 7, characterized in that: A filter box is arranged inside the protective shell, and two groups of air inlet pipes are connected through the surface of the filter box. The two groups of air inlet pipes are respectively connected to the surfaces of two groups of fixed shafts. A barrier net is arranged on the surface of the filter box to prevent splashed aggregates from entering the filter box during stirring. A filter net is movably arranged inside the filter box, and a dust exhaust plate is rotatably connected to the side of the barrier net below the filter net.

9. The concrete regeneration equipment according to claim 8, characterized in that: A slide plate is slidably connected to the bottom of the filter box, the upper end of the slide plate is frictionally connected to the barrier net, the lower end of the slide plate is slidably connected to the cam, and a second return spring is provided at the connection between the slide plate and the filter box.

10. Application of a concrete recycling device in road construction, using the concrete recycling device of claim 9, characterized in that: A roller is arranged below the base, and the surface of the concrete block is cleaned and put into the lower hopper, and then the concrete block is crushed and preheated by the crushing component, and stirred by the stirring component. Additives are automatically added intermittently during the stirring process. After the stirring is completed, the discharge port is opened to release the recycled concrete directly to the working area for use.

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