An integrated milling and crushing device for waste asphalt pavement materials

Abstract

This invention discloses an integrated milling and crushing device for waste asphalt pavement materials, comprising an integrated milling and crushing machine, which includes an in-situ cold recycling machine, a milling cover, milling rollers, spray heads, a discharge adjustment plate, and an inner cavity; a support assembly, which includes a support cylinder and a bearing cavity; a screening assembly, which includes a baffle and a hook; and an elastic assembly, which includes an elastic rope and a second pull rope. This invention features a support assembly and a screening assembly. The support cylinder and baffles form a grid for intercepting large asphalt fragments. Each baffle is connected to a single elastic rope via a second pull rope. When small fragments impact, the baffles rotate slightly to dissipate force, reducing rigid impact and extending service life. When large fragments simultaneously impact multiple adjacent baffles, multiple pull ropes pull the elastic rope together. The more pull ropes there are, the greater the resistance of the elastic rope, making it difficult for the baffles to rotate significantly, thus preventing excessive gaps that could lead to interception failure.

Description

Technical Field

[0001] This invention relates to the field of asphalt recycling technology, specifically to an integrated milling and crushing device for waste asphalt pavement materials. Background Technology

[0002] In highway maintenance projects, when asphalt pavements exhibit large-area network cracking, rutting, subsidence, or other structural defects, or when the pavement strength index fails to meet traffic requirements, it is necessary to mill and resurface the original asphalt surface layer. Currently, in-situ cold recycling machines are the core equipment for treating such defects. Their working principle is as follows: a high-powered engine drives a milling rotor equipped with closely spaced cutting teeth to rotate at high speed, cutting and peeling away the old asphalt pavement during operation. The recycling agent is then sprayed and initially mixed within the casing, and the resulting recycled mixture is directly laid on-site as the road base.

[0003] During asphalt pavement reconstruction, the mechanical strength and shrinkage resistance of cold recycled mixtures used as the road base layer largely depend on the content and gradation continuity of asphalt fine aggregates in the mixture. However, the old material produced by the milling rotors of existing in-situ cold recycling machines is mostly in flake or block form, with insufficient fine aggregate proportions. To obtain sufficient fine aggregates to meet the gradation requirements of the base layer, construction sites are often forced to adopt a method of reducing travel speed and increasing rotor speed, causing the rotor to rotate repeatedly on the same working surface. The cutting teeth then subject the stripped material to secondary or even multiple impacts and grinding within the casing, severely slowing down the project progress and multiplying the construction time per unit working surface. At the same time, the rotor's prolonged high-speed idling and grinding within the enclosed casing not only leads to a sharp increase in abnormal wear of the cutting teeth and cutter heads, significantly increasing maintenance and consumable costs, but excessive grinding also damages the angularity and mechanical strength of the original aggregates, ultimately reducing the final road performance of the recycled base layer. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated milling and crushing device for waste asphalt pavement materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated milling and crushing operation device for waste asphalt pavement materials, comprising an integrated milling and crushing equipment, wherein the integrated milling and crushing equipment includes an in-situ cold recycling machine, wherein a milling cover is provided at the bottom of the in-situ cold recycling machine, a milling roller is rotatably installed inside the milling cover, a spray head is provided inside the milling cover, a discharge adjustment plate is movably provided at the tail of the milling cover, and an inner cavity is opened inside the milling cover;

[0006] A support assembly is fixed in the inner cavity. The support assembly includes a support cylinder fixedly installed inside the inner cavity, and a bearing cavity is opened inside the support cylinder.

[0007] A screening assembly for intercepting large pieces of asphalt is rotatably arranged between two adjacent support cylinders. The screening assembly includes a baffle rod rotatably installed between the two adjacent support cylinders, and two hooks are symmetrically fixed at the top of the baffle rod.

[0008] The inner cavity is provided with an elastic component for elastic resistance to rotation. The elastic component includes elastic ropes connected to both ends of the inner cavity. Several pairs of second pull ropes are equidistantly connected to the elastic ropes, and the second pull ropes are engaged with the corresponding hooks.

[0009] Preferably, the support cylinder has a pressing groove and a mating groove on both sides, the pressing groove and the mating groove are connected, and the inner wall of the pressing groove is connected to a plurality of circumferentially arranged limiting grooves.

[0010] Preferably, a pair of rotating shafts are symmetrically fixed on both sides of the top end of the stop bar, and the rotating shafts are respectively rotatably connected to the corresponding bearing cavities. A first torsion spring is sleeved on the rotating shaft, and the rotating shaft is elastically connected to the support cylinder through the first torsion spring.

[0011] Preferably, one side of the top of the stop bar has a circumferential array of stop teeth for stopping the rotation of the stop bar, and the stop teeth are rotatably connected to the corresponding pressing grooves, and the other side of the top of the stop bar has a circumferential array of several rollers.

[0012] Preferably, a plurality of first pull ropes are equidistantly connected to the elastic rope, and a lever is rotatably arranged in the inner cavity at a position corresponding to each of the stop bars. A buffer groove is provided at one end of the lever, and a slider that slides elastically through a first spring is provided in the buffer groove. The other end of the first pull rope is connected to the slider.

[0013] Preferably, a braking assembly for braking the stop lever is provided in the pressing groove. The braking assembly includes a sleeve slidably connected inside the pressing groove. Several limiting strips are fixed on the circumference of the outer cylindrical surface of the sleeve. The limiting strips are slidably connected in corresponding limiting grooves. Several mating blocks are fixed on the circumference of one side of the sleeve. The mating blocks are slidably connected in corresponding mating grooves, and the roller abuts against the corresponding mating blocks. Several limiting posts are fixed on the circumference of the inside of the sleeve. A second spring is sleeved on the limiting post. A braking toothed ring is slidably provided inside the other side of the sleeve. One end of the second spring is installed on one side of the braking toothed ring, and the other side of the braking toothed ring is engaged with a corresponding stop tooth.

[0014] Preferably, the limiting post and the braking toothed ring are spaced apart, and when the sleeve slides a certain distance, the limiting post abuts against the braking toothed ring.

[0015] Preferably, a rebound assembly for assisting in crushing large asphalt fragments is slidably disposed inside the stop bar. The rebound assembly includes a long plate slidably installed inside the stop bar, with the other end of the lever abutting the top of the long plate. Several pressure plates are fixed to the side of the long plate. A third spring is installed inside the stop bar at the bottom of the long plate. The long plate slides elastically with the stop bar through the third spring. Several rebound plates are rotatably installed on the side of the stop bar, with corresponding pressure plates abutting the top of the rebound plates. A rotating rod is fixed to the back of the rebound plate. A second torsion spring is sleeved at the end of the rotating rod. The rotating rod rotates elastically with the stop bar through the second torsion spring. A crushing blade is fixed to the front of the rebound plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The milling casing is internally equipped with support and screening components. Multiple support cylinders and multiple baffles together form a "grid" that can intercept large asphalt fragments. Each baffle is connected to a second pull rope, and all second pull ropes are connected to an elastic rope. When a small asphalt fragment hits a baffle, the impact force causes the baffle to rotate slightly, thereby reducing the impact force of the rigid collision and improving the service life of the equipment. When the baffle rotates, it pulls the second pull rope, which in turn pulls the elastic rope. The elasticity of the elastic rope then acts on the baffle, reducing the rotation range of the baffle. When a large asphalt fragment hits multiple consecutive baffles, multiple second pull ropes will pull the elastic rope simultaneously. The more second pull ropes pulling the elastic rope, the greater the resistance of the elastic rope, which in turn acts on each baffle, preventing the baffle from rotating at a large angle. This prevents the baffle from rotating too much, creating larger gaps, and causing the interception effect to disappear.

[0018] 2. As the stop bar rotates, it also presses against the mating block through the roller, causing the sleeve to drive the braking tooth ring closer to another adjacent stop bar. This causes the braking tooth ring to abut against the stop tooth on the side of the top of the adjacent stop bar, pressing the braking tooth ring against the stop tooth and locking the adjacent stop bar so that it can continue to rotate. The stop bars restrain each other, achieving a more effective and sustainable chain effect. This significantly reduces the rotation angle of the stop bars when large asphalt fragments collide with multiple consecutive stop bars at the same time, further improving the screening effect of the screening component.

[0019] 3. As the impact force of the asphalt fragments increases, the rotation angle of the stop bar increases, and the degree to which the elastic rope pulls on each first pull rope also increases. This causes the lever to rotate through the first pull rope, pressing the long plate. The long plate, through the pressure plate, causes the rebound plate on the surface of the stop bar to bounce. The rebound plate not only pushes back the asphalt fragments that impact it, but the crushing blades on the surface of the rebound plate can also cut the asphalt fragments when they impact them, thereby splitting the asphalt fragments. This reduces the pressure on the milling roller to crush the asphalt fragments, thus improving the crushing efficiency and effect of the asphalt fragments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of a portion of the integrated milling and crushing equipment of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-section of the milled casing of the present invention;

[0023] Figure 4 This is a schematic diagram of the supporting component and screening component of the present invention;

[0024] Figure 5 This is a cross-sectional view of the support cylinder of the present invention;

[0025] Figure 6 This is a schematic diagram showing the cooperation between the screening component and the braking component of the present invention;

[0026] Figure 7 This is a schematic diagram of the braking component structure of the present invention;

[0027] Figure 8 This is a cross-sectional schematic diagram of the screening component of the present invention;

[0028] Figure 9 This is a schematic diagram showing the relationship between the support component, screening component, rebound component, and elastic component of the present invention;

[0029] Figure 10 For the present invention Figure 9 Enlarged diagram of point A in the middle.

[0030] In the diagram: 1. Milling and crushing integrated equipment; 10. In-situ cold recycling machine; 11. Milling cover; 12. Milling roller; 13. Spray head; 14. Discharge regulating plate; 15. Inner cavity; 2. Support assembly; 20. Support cylinder; 21. Bearing cavity; 22. Pressing groove; 23. Fitting groove; 24. Limiting groove; 3. Screening assembly; 30. Stop bar; 31. Rotating shaft; 32. First torsion spring; 33. Stop tooth; 34. Roller; 35. Hook; 4. Elastic component; 40. Elastic rope; 41. First pull rope; 42. Second pull rope; 43. Lever; 44. Buffer groove; 45. Slider; 46. First spring; 5. Braking assembly; 50. Sleeve; 51. Limiting strip; 52. Mating block; 53. Limiting post; 54. Second spring; 55. Braking toothed ring; 6. Rebound assembly; 60. Long plate; 61. Pressure plate; 62. Third spring; 63. Rebound plate; 64. Rotating rod; 65. Second torsion spring; 66. Crushing blade. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-10 The present invention provides a technical solution: an integrated milling and crushing device for waste asphalt pavement materials;

[0033] Example 1: Please refer to Figure 1 - Figure 4 , Figure 9 This embodiment describes one feasible structure of an integrated milling and crushing equipment for waste asphalt pavement materials;

[0034] The milling and crushing integrated equipment 1 includes an on-site cold recycling machine 10. The on-site cold recycling machine 10 is provided with a milling cover 11 at the bottom. A milling roller 12 is rotatably installed inside the milling cover 11. A spray head 13 is provided inside the milling cover 11. A discharge adjustment plate 14 is movably provided at the tail of the milling cover 11. An inner cavity 15 is opened inside the milling cover 11.

[0035] In this embodiment, the in-situ cold recycling machine 10 moves at a constant speed along the waste asphalt pavement to be treated. Simultaneously, the milling roller 12 inside the milling housing 11 rotates at high speed. The surface of the milling roller 12 is covered with bullet-shaped cutting teeth. During the high-speed rotation of the milling roller 12, the cutting teeth cut into the asphalt pavement, milling away the old asphalt material. The milled material is then thrown backward during the rotation of the milling roller 12. The old asphalt material contains fragments of varying sizes; during the throwing process, the continuously rotating milling roller 12 further breaks these asphalt fragments, achieving a crushing effect. The spray heads 13 include two sets. Depending on the specific type of asphalt pavement, only one set of spray heads 13 may be activated, or both sets may be activated simultaneously. The two sets of spray heads 13 have different functions: one set is connected to an asphalt tanker and sprays foamed asphalt; the other set is connected to a water truck or cement slurry mixer and sprays water or cement slurry.

[0036] A support assembly 2 is fixed in the inner cavity 15. The support assembly 2 includes a support cylinder 20 fixedly installed inside the inner cavity 15. A bearing cavity 21 is opened inside the support cylinder 20.

[0037] In this embodiment, the support cylinder 20 is used to support the rotation of the stop rod 30.

[0038] A screening component 3 for intercepting large pieces of asphalt is rotatably installed between two adjacent support cylinders 20. The screening component 3 includes a baffle 30 rotatably installed between two adjacent support cylinders 20. Two hooks 35 are symmetrically fixed at the top of the baffle 30. A pair of rotating shafts 31 are symmetrically fixed on both sides of the top of the baffle 30. The rotating shafts 31 are rotatably connected to the corresponding bearing cavities 21. A first torsion spring 32 is sleeved on the rotating shaft 31. The rotating shaft 31 is elastically connected to the support cylinder 20 through the first torsion spring 32.

[0039] In this embodiment, the milling roller 12 rotates to mill the asphalt road, and the old material produced by cutting is mostly in the shape of flakes or strips, rather than in the shape of nearly round granules. If this kind of material is used as recycled base layer, the skeleton interlocking ability will be poor, and the structural stability will be difficult to meet the road standards. Multiple support cylinders 20 and spaced-apart baffles 30 together form a grid that allows small asphalt fragments to pass through while blocking larger ones. The milling roller 12 rotates, throwing the cut material backwards and impacting the baffles 30. Small asphalt fragments can be thrown out through the gaps between adjacent baffles 30, while larger fragments are blocked and return to the rotation area of ​​the milling roller 12, where they are further crushed by the cutting teeth, achieving a further crushing effect. Simultaneously, the baffles 30 can rotate elastically within the support cylinders 20 via a first torsion spring 32. The thrown asphalt fragments possess a certain potential energy; if the baffles 30 were rigidly set, they would quickly damage from prolonged impact. The elastic setting of the baffles 30 provides a buffering effect, reducing impact and increasing service life. Furthermore, some small asphalt fragments will impact the baffles 30; the impact force causes the baffles 30 to rotate at a certain angle, preventing direct rebound of small fragments. The backward rotation of the baffles 30 also expands the spacing between them in three-dimensional space, allowing more small asphalt fragments to be thrown out smoothly.

[0040] The inner cavity 15 is provided with an elastic component 4 for elastic resistance to rotation. The elastic component 4 includes an elastic rope 40 connected to both ends of the inner cavity 15. Several pairs of second pull ropes 42 are connected at equal intervals on the elastic ropes 40, and the second pull ropes 42 are engaged with the corresponding hooks 35.

[0041] In this embodiment, the rotation of the baffle 30 is connected to the elastic rope 40 via the second pull rope 42. The elastic rope 40 has a certain elasticity and can deform elastically. The above describes the state of small-sized asphalt fragments hitting the baffle 30. Therefore, there must also be large-sized asphalt fragments hitting the baffle 30. When the baffle 30 rotates, the baffle 30 only rotates slightly at a certain angle because the impact force of small-sized asphalt fragments is small. However, the impact force of large-sized asphalt fragments is large, which may cause the baffle 30 to rotate significantly. This will not only cause the baffle 30 to lose its function of intercepting large-sized asphalt fragments, but also cause the baffle 30 to move too much, resulting in a large gap, which will also cause more asphalt fragments of different sizes to "escape". Therefore, it is necessary to limit the rotation angle of the baffle 30. A characteristic of large asphalt fragments impacting the stop bar 30 is that they may simultaneously impact multiple adjacent stop bars 30. When the impact force is too large, the rotation of the stop bar 30 will cause the second pull rope 42 to pull the elastic rope 40. The more second pull ropes 42 that pull the elastic rope 40, the greater the resistance of the elastic rope 40. As a result, the second pull ropes 42 pull each stop bar 30 in the opposite direction, preventing the stop bar 30 from rotating at a large angle. Therefore, the impact force of the large asphalt fragments is not enough to push away multiple stop bars 30 at the same time. They will be steadily intercepted by the stop bars 30 and then fall due to gravity, where they will be broken again by the milling roller.

[0042] Example 2: Please refer to Figure 4 - Figure 7 Based on Embodiment 1, this embodiment takes into account that in Embodiment 1, relying solely on the cooperation between the elastic rope 40 and the second pull rope 42, the elastic rope 40 is prone to tensile fatigue during long-term use, resulting in a reduction or disappearance of the braking effect. Therefore, Embodiment 2 solves the problem of fatigue damage caused by long-term stretching and contraction of the elastic rope 40 through the following structure.

[0043] The support cylinder 20 has a pressing groove 22 and a mating groove 23 on both sides, which are connected. The inner wall of the pressing groove 22 is connected to a number of circumferentially arranged limiting grooves 24.

[0044] The top of the stop lever 30 has a circumferential array of stop teeth 33 for stopping the rotation of the stop lever 30, and the stop teeth 33 are rotatably connected in the corresponding pressing groove 22. The other side of the top of the stop lever 30 has a circumferential array of several rollers 34.

[0045] A braking assembly 5 for braking the stop lever 30 is provided in the pressing groove 22. The braking assembly 5 includes a sleeve 50 slidably connected inside the pressing groove 22. Several limiting strips 51 are fixed on the outer cylindrical surface of the sleeve 50. The limiting strips 51 are slidably connected in the corresponding limiting grooves 24. Several mating blocks 52 are fixed on one side of the sleeve 50. The mating blocks 52 are slidably connected in the corresponding mating grooves 23, and the roller 34 abuts against the corresponding mating block 52. Several limiting posts 53 are fixed on the inner circumference of the sleeve 50. A second spring 54 is sleeved on the limiting post 53. A braking toothed ring 55 is slidably provided inside the other side of the sleeve 50. One end of the second spring 54 is installed on one side of the braking toothed ring 55, and the other side of the braking toothed ring 55 is engaged with the corresponding stop tooth 33.

[0046] In this embodiment, the stop tooth 33 on one side of the top of the stop lever 30 and the corresponding brake tooth ring 55 are disposed in the same pressing groove 22. The roller 34 on the other side of the top of the same stop lever 30 and the corresponding mating block 52 are disposed in the mating groove 23 in another support cylinder 20. When one stop lever 30 rotates around the rotating shaft 31, the roller 34 on the other side of the stop lever 30 will press the corresponding mating block 52. The mating block 52 pushes the sleeve 50 to slide, so that the limiting post 53 inside the sleeve 50 abuts against the brake tooth ring 55, and drives the brake tooth ring 55 to approach the stop tooth 33 on the top side of the other stop lever 30, so that the brake tooth ring 55 and the stop tooth 33 are engaged. As the rotation angle of the previous stop lever 30 increases, the pressure of the brake tooth ring 55 on the stop tooth 33 is greater, and the restraining effect is better. In this way, the rotation of the previous stop bar 30 can limit the rotation of the other stop bar 30 associated with it through the braking component 5. Conversely, the position of the mating block 52 also limits the roller 34 on the side of the previous stop bar 30, thereby limiting the previous stop bar 30 from continuing to rotate. The mutual restraint achieves a more effective and sustainable chain effect, significantly reducing the rotation angle of the stop bar 30 when large asphalt fragments simultaneously impact multiple consecutive stop bars 30, and further improving the screening effect of the screening component 3.

[0047] The limiting post 53 and the braking toothed ring 55 are spaced apart. When the sleeve 50 slides a certain distance, the limiting post 53 abuts against the braking toothed ring 55.

[0048] In this embodiment, the limiting post 53 and the braking toothed ring 55 are not in direct contact, but are elastically connected by a second spring 54 sleeved on the limiting post 53. When a small piece of asphalt impacts a single stop bar 30, the stop bar 30 will also rotate slightly. This rotation will also press the corresponding mating block 52 through the roller 34. The mating block 52 being pressed will cause the sleeve 50 to slide in the pressing groove 22. Since the braking toothed ring 55 and the sleeve 50 are connected by the second spring 54, the sliding of the sleeve 50 will also cause the braking toothed ring 55 to slide, resulting in the braking toothed ring 55 contacting the stop tooth 3 on the side of the top of another stop bar 30. 3. However, since there is a certain space between the limiting post 53 and the braking ring 55, and the braking ring 55 is elastically sliding, the braking ring 55 will not lock the stop tooth 33, that is, it will not restrict the rotation of the other stop bar 30. When a large piece of asphalt hits the stop bar 30, the impact force is large and the rotation angle of the stop bar 30 increases significantly. Therefore, the roller 34 squeezes the mating block 52 more, and the displacement distance of the sleeve 50 increases further. At this time, the second spring 54 is compressed, the limiting post 53 abuts against the braking ring 55, and pushes the braking ring 55 to press the stop tooth 33 on the top side of the other stop bar 30, thus achieving locking.

[0049] Example 3: Please refer to Figure 4 - Figure 10 Based on Embodiment 1, this embodiment takes into account that the kinetic energy of the large asphalt fragments intercepted by the baffle 30 in Embodiment 1 is lost, and they fall naturally under the action of gravity. However, the fragments fall in the latter half of the milling roller 12, that is, the non-crushing area. The crushing effect and efficiency in this area are greatly reduced, which may lead to the accumulation of large fragments, causing wear, tooth jamming and other risks. Therefore, Embodiment 3 solves the problem of low crushing efficiency and fragment accumulation caused by the free fall of large asphalt fragments through the following structure.

[0050] Several first pull ropes 41 are equidistantly connected to the elastic rope 40. A lever 43 is rotatably arranged in the inner cavity 15 at a position corresponding to each stop bar 30. A buffer groove 44 is opened at one end of the lever 43. A slider 45 is provided in the buffer groove 44 and is elastically slidable by a first spring 46. The other end of the first pull rope 41 is connected to the slider 45.

[0051] In this embodiment, the rotation of the stop lever 30 causes the second pull rope 42 to pull the elastic rope 40 to deform. This deformation pulls the first pull rope 41, causing it to shift and rotate the lever 43. This lowers one end of the lever 43, pressing down the long plate 60 and causing the rebound plate 63 to pop out, thus rebounding large asphalt fragments and achieving a back-throwing effect. This allows the large asphalt fragments to return to the crushing area of ​​the milling roller 12, thereby improving the crushing efficiency and effect of the asphalt fragments. A buffer groove 44 is provided at the other end of the lever 43, such as... Figure 10As shown, initially, slider 45 is located on the left side of buffer groove 44. When a small asphalt fragment hits the stop bar 30, the stop bar 30 rotates slightly, but it also pulls the elastic rope 40 through the second pull rope 42. The elastic rope 40 then pulls the first pull rope 41, which causes slider 45 to slide in buffer groove 44. However, it does not cause lever 43 to rotate, so it does not drive the rebound component 6. When a large asphalt fragment hits the stop bar 30, the rotation angle of the stop bar 30 increases, the deformation of the elastic rope 40 increases, and the distance that the first pull rope 41 pulls slider 45 to move also increases, causing slider 45 to slide to the right end of buffer groove 44. When the first pull rope 41 continues to pull slider 45, slider 45 will drive lever 43 to rotate around the fulcrum, thereby achieving the effect of driving the rebound component 6.

[0052] Inside the stop bar 30, a rebound assembly 6 is slidably installed to assist in crushing large pieces of asphalt. The rebound assembly 6 includes a long plate 60 slidably installed inside the stop bar 30, with the other end of the lever 43 abutting against the top of the long plate 60. Several pressure plates 61 are fixed to the side of the long plate 60. A third spring 62 is installed inside the stop bar 30 at the bottom of the long plate 60. The long plate 60 slides elastically with the stop bar 30 through the third spring 62. Several rebound plates 63 are rotatably installed on the side of the stop bar 30, with the corresponding pressure plates 61 abutting against the top of the rebound plates 63. A rotating rod 64 is fixed to the back of the rebound plate 63. A second torsion spring 65 is sleeved at the end of the rotating rod 64. The rotating rod 64 rotates elastically with the stop bar 30 through the second torsion spring 65. A crushing blade 66 is fixed to the front of the rebound plate 63.

[0053] In this embodiment, when the lever 43 presses down on the long plate 60, the long plate 60 slides into the inside of the stop bar 30 and moves the rebound plate 63 through the pressure plate 61. The rotating rod 64 on the rebound plate 63 is positioned closer to the top. Utilizing the lever principle, when the pressure plate 61 moves the top of the rebound plate 63, the bottom of the rebound plate 63 rotates more, and it will immediately pop out from the front of the long plate 60, thereby pushing the large-sized asphalt fragments that have impacted the front of the stop bar 30 back to the crushing area of ​​the milling roller 12. The surface of the rebound plate 63 is provided with crushing blades 66. During the popping process of the rebound plate 63, the crushing blades 66 impact the surface of the asphalt fragments, playing a certain cutting role and assisting the milling roller 12 in crushing the asphalt fragments.

[0054] Working principle: The in-situ cold recycling machine 10 moves forward at a constant speed on the waste asphalt road surface to be repaired. At the same time, the power system on the in-situ cold recycling machine 10 drives the milling roller 12 to rotate at high speed. During the movement of the in-situ cold recycling machine 10, the milling roller 12 mills the road surface, and the asphalt fragments cut off are then crushed by the cutting teeth. At the same time as crushing, the spray head 13 sprays foamed asphalt for mixing. The crushed asphalt fragments are thrown along the milling cover 11 to the tail of the milling cover 11. The discharge adjustment plate 14 is height-adjusted by a hydraulic push rod, which can directly control the initial height of the new asphalt road surface.

[0055] Asphalt fragments are thrown to the tail of the milling cover 11, they pass through a grid composed of multiple support cylinders 20 and multiple baffles 30. Small asphalt fragments are thrown out through the gaps between the baffles 30, while large asphalt fragments are intercepted by the baffles 30.

[0056] Small asphalt fragments, due to their small size, are either thrown through the gaps between the stop bars 30 or impact a single stop bar 30. When impacting a stop bar 30, the impact force may cause the stop bar 30 to rotate. When the stop bar 30 rotates, the shaft 31 rotates within the bearing cavity 21, causing the first torsion spring 32 to store force. Simultaneously, the rotation of the stop bar 30 pulls the elastic rope 40 through the hook 35 and the second pull rope 42, causing the elastic rope 40 to deform. The reaction force of the elastic deformation of the elastic rope 40 then pulls the stop bar 30 through the second pull rope 42, preventing the stop bar 30 from continuing to move.

[0057] At the same time, the stop lever 30 drives the stop teeth 33 and rollers 34 on both sides of its top end to rotate in the two support cylinders 20 respectively. The stop teeth 33 rotate in the corresponding pressing groove 22; the rollers 34 rotate in the corresponding mating groove 23 and squeeze the mating block 52, causing the mating block 52 to push the sleeve 50 to slide. Since the brake ring 55 and the sleeve 50 are connected by the second spring 54, the sleeve 50 slides, and the brake ring 55 slides through the second spring 54. The brake ring 55 contacts the stop tooth 33 on the side of the top end of the other stop lever 30. However, since there is a certain space between the limiting post 53 and the brake ring 55, and the brake ring 55 slides elastically, the brake ring 55 will not lock the stop tooth 33.

[0058] When large asphalt fragments impact, they may simultaneously strike multiple consecutive stop bars 30. The second pull ropes 42 on multiple stop bars 30 pull the elastic ropes 40 at the same time. The resistance generated by the elastic ropes 40 greatly restricts the continued rotation of each stop bar 30. Furthermore, due to the greater impact force of large asphalt fragments striking the stop bars 30, the stop bars 30 rotate at a larger angle compared to the impact of small asphalt fragments. As the rotation angle of the stop bars 30 increases, the pressure of the rollers 34 on the mating block 52 increases, and the displacement distance of the sleeve 50 further increases. This process continuously compresses the second spring 54 until the limiting post 53 abuts against the braking tooth ring 55. Subsequently, the sleeve 50 pushes the braking tooth ring 55 through the limiting post 53 to press against the corresponding stop tooth 33, thereby achieving locking. This not only reduces the force on the elastic rope 40, preventing it from being damaged due to excessive fatigue and extending its service life, but also further brakes the stop bars 30, preventing the stop bars 30 from rotating too much and losing their function of intercepting large asphalt fragments.

[0059] When the stop lever 30 rotates, it pulls the elastic rope 40 via the second pull rope 42. The elastic rope 40 then pulls the first pull rope 41. When a small piece of asphalt impacts the stop lever 30, the stop lever 30 rotates slightly, and the elastic rope 40 slightly moves the first pull rope 41. During this process, the first pull rope 41 moves the slider 45 within the buffer groove 44. The slider 45 stretches the first spring 46. Since the slider 45 slides within the buffer groove 44, it will not cause the lever 43 to rotate via the first pull rope 41. When a large piece of asphalt impacts the stop lever 30, the rotation angle of the stop lever 30 increases, and the elastic rope 40 moves the first pull rope 41 a correspondingly larger distance. During this process, the slider 45... 5. Slide to the other end of the buffer groove 44, while the first pull rope 41 continues to pull the slider 45. The slider 45 drives the lever 43 to rotate around the fulcrum. One end of the lever 43 presses down on the long plate 60. The long plate 60 presses down on the top of the rebound plate 63 through the pressure plate 61. The rebound plate 63 rotates around the rotating rod 64. The rotating rod 64 causes the second torsion spring 65 to store force. The bottom of the rebound plate 63 immediately bounces up, causing the crushing blade 66 to hit the surface of the large-sized asphalt fragments. This not only pushes the large-sized asphalt fragments back to the crushing area of ​​the milling roller 12, but also allows the crushing blade 66 to perform preliminary cutting on the large-sized asphalt fragments, assisting the milling roller 12 in crushing and improving the crushing effect and efficiency of the milling roller 12.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A milling and crushing integrated operation device for waste asphalt pavement materials, comprising an integrated milling and crushing equipment (1), wherein the integrated milling and crushing equipment (1) includes an in-situ cold recycling machine (10), wherein a milling cover (11) is provided at the bottom of the in-situ cold recycling machine (10), a milling roller (12) is rotatably installed inside the milling cover (11), a spray head (13) is provided inside the milling cover (11), and a discharge adjustment plate (14) is movably provided at the tail of the milling cover (11), characterized in that: The milling cover (11) has an inner cavity (15) inside; A support assembly (2) is fixed in the inner cavity (15). The support assembly (2) includes a support cylinder (20) fixedly installed inside the inner cavity (15). A bearing cavity (21) is opened inside the support cylinder (20). A screening assembly (3) for intercepting large pieces of asphalt is rotatably arranged between two adjacent support cylinders (20). The screening assembly (3) includes a baffle (30) rotatably installed between two adjacent support cylinders (20). Two hooks (35) are symmetrically fixed at the top of the baffle (30). The inner cavity (15) is provided with an elastic component (4) for elastic resistance to rotation. The elastic component (4) includes an elastic rope (40) connected to both ends of the inner cavity (15). Several pairs of second pull ropes (42) are connected at equal intervals on the elastic rope (40), and the second pull ropes (42) are engaged with the corresponding hooks (35).

2. The integrated milling and crushing device for waste asphalt pavement materials according to claim 1, characterized in that: The support cylinder (20) has a pressing groove (22) and a mating groove (23) on both sides respectively. The pressing groove (22) and the mating groove (23) are connected. The inner wall of the pressing groove (22) is connected to a number of circumferentially arranged limiting grooves (24).

3. The integrated milling and crushing device for waste asphalt pavement materials according to claim 2, characterized in that: A pair of rotating shafts (31) are symmetrically fixed on both sides of the top of the stop bar (30), and the rotating shafts (31) are rotatably connected to the corresponding bearing cavity (21). A first torsion spring (32) is sleeved on the rotating shaft (31), and the rotating shaft (31) is elastically connected to the support cylinder (20) through the first torsion spring (32).

4. The integrated milling and crushing device for waste asphalt pavement materials according to claim 3, characterized in that: The top of the stop bar (30) has a circumferential array of stop teeth (33) on one side for stopping the rotation of the stop bar (30), and the stop teeth (33) are rotatably connected in the corresponding pressing groove (22). The top of the stop bar (30) has a circumferential array of several rollers (34).

5. The integrated milling and crushing device for waste asphalt pavement materials according to claim 1, characterized in that: A plurality of first pull ropes (41) are equidistantly connected to the elastic rope (40). A lever (43) is rotatably arranged in the inner cavity (15) at a position corresponding to each of the stop bars (30). A buffer groove (44) is provided at one end of the lever (43). A slider (45) is provided in the buffer groove (44) and slides elastically through a first spring (46). The other end of the first pull rope (41) is connected to the slider (45).

6. The integrated milling and crushing device for waste asphalt pavement materials according to claim 4, characterized in that: A braking assembly (5) for braking the stop lever (30) is provided in the pressing groove (22). The braking assembly (5) includes a sleeve (50) slidably connected to the inside of the pressing groove (22). Several limiting strips (51) are fixed around the outer cylindrical surface of the sleeve (50). The limiting strips (51) are slidably connected to the corresponding limiting grooves (24). Several mating blocks (52) are fixed around one side of the sleeve (50). The mating blocks (52) are slidably connected to the corresponding limiting grooves (24). Inside the mating groove (23), the roller (34) abuts against the corresponding mating block (52). Several limiting posts (53) are fixed on the inner circumference of the sleeve (50). A second spring (54) is sleeved on the limiting post (53). A braking toothed ring (55) is slidably arranged inside the other side of the sleeve (50). One end of the second spring (54) is installed on one side of the braking toothed ring (55), and the other side of the braking toothed ring (55) is engaged with the corresponding stop tooth (33).

7. The integrated milling and crushing device for waste asphalt pavement materials according to claim 6, characterized in that: The limiting post (53) and the braking toothed ring (55) are spaced apart. When the sleeve (50) slides a certain distance, the limiting post (53) abuts against the braking toothed ring (55).

8. The integrated milling and crushing device for waste asphalt pavement materials according to claim 5, characterized in that: The stop bar (30) is slidably equipped with a rebound assembly (6) for assisting in breaking large pieces of asphalt. The rebound assembly (6) includes a long plate (60) slidably installed inside the stop bar (30), and the other end of the lever (43) abuts against the top of the long plate (60). Several pressure plates (61) are fixed to the side of the long plate (60). A third spring (62) is installed inside the stop bar (30) at the bottom of the long plate (60). The long plate (60) is supported by the third spring (62). 62) It slides elastically with the stop bar (30). The stop bar (30) has several rebound plates (63) rotatably mounted on its side, and the corresponding pressure plate (61) abuts against the top of the rebound plate (63). A rotating rod (64) is fixed on the back of the rebound plate (63). A second torsion spring (65) is sleeved on the end of the rotating rod (64). The rotating rod (64) rotates elastically with the stop bar (30) through the second torsion spring (65). A crushing blade (66) is fixed on the front of the rebound plate (63).

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