Old asphalt pavement material crushing equipment
By designing old asphalt pavement material crushing equipment and optimizing the crushing process using pre-screening and material discharging mechanisms, the on-site crushing and efficient recycling of old asphalt pavement materials is achieved, resource waste and traffic pressure problems are solved, and construction efficiency is improved.
Patent Information
- Application Number
- CN202422384562.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
During the asphalt pavement maintenance process, the crushing and recycling of old pavement materials has problems of resource waste and environmental pollution. At the same time, the existing technology requires the transport of old asphalt materials to specific locations to crush, which increases construction period and traffic pressure.
An old asphalt pavement material crushing equipment including a first-level crushing device, a second-level crushing device and a pre-screening device was designed. Small-particle material was screened out through the pre-screening device and into the second-level crushing device. Large-particle material entered the first-level crushing device. The material was smoothly entered into the second-level crushing device by means of a material removal mechanism, reducing the energy consumption of first-level crushing, and realizing on-site crushing through the walking mechanism.
It has achieved on-site crushing of old asphalt pavement materials, reducing energy consumption, shortening construction period, alleviating traffic pressure, and improving construction efficiency.
Smart Images
Figure CN223134907U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of crushing equipment, and particularly relates to a crushing equipment for old asphalt pavement materials. Background Technique
[0002] During the maintenance of asphalt pavement, it is necessary to crush and remove the old pavement. If the old pavement materials are directly discarded without recycling, a large amount of solid waste will be generated, which will not only increase the difficulty of environmental governance, but also cause great waste of resources. After analysis, the research personnel found that the large pieces of old asphalt materials obtained by impact with a breaker are less broken than the aggregates obtained by the milling method. The large pieces of old asphalt materials obtained by impact need to be crushed and peeled to obtain stones that meet the requirements for reuse.
[0003] At present, the old asphalt materials are often transported to a specific location by a trailer for crushing, which will increase the transfer time and prolong the construction period, and the traffic pressure is relatively large. Therefore, it is necessary to develop a new type of equipment that can be crushed on site, which is convenient to cooperate with the scraping equipment, peeling equipment and batching equipment to realize the in-situ regeneration of asphalt mixture and complete rapid paving. Content of the Utility Model
[0004] In order to solve the above problems, the utility model provides a crushing equipment for old asphalt pavement materials.
[0005] In order to achieve the above object, the technical scheme adopted by the utility model is as follows:
[0006] A crushing equipment for old asphalt pavement materials includes a primary crushing device, a secondary crushing device and a pre-screening device. The feeding port of the primary crushing device can be connected to the discharging port of the scraping equipment. The discharging port of the primary crushing device is connected to the feeding port of the secondary crushing device. The oversize discharge port of the pre-screening device is connected to the feeding port of the primary crushing device. The undersize of the pre-screening device is connected to the feeding port of the secondary crushing device through a guiding chute. The discharging port of the secondary crushing device can be connected to the peeling equipment in the peeling process.
[0007] Further, the primary crushing device is arranged on the top of the secondary crushing device. The pre-screening device is arranged on the upper side of the primary crushing device. A material distributing mechanism is arranged at the end of the roller shaft of the primary crushing device for distributing the old asphalt pavement materials in the guiding chute to the feeding port of the secondary crushing device.
[0008] Further, the primary crushing device includes a primary housing and two first toothed rollers driven to rotate relatively by a first motor inside. The gap between the two first toothed rollers is 40-50 mm. The secondary crushing device includes a secondary housing and two second toothed rollers driven to rotate relatively by a second motor inside. The gap between the two second toothed rollers is 20-30 mm.
[0009] Furthermore, a feed hopper with a larger upper part and a smaller lower part is provided at the top feed inlet of the secondary casing. A spray head is provided at the bottom of the feed hopper; two wire brushes are symmetrically provided on both sides of the lower part of the secondary casing for brushing the asphalt mixture adhered to the surface of the second toothed roller.
[0010] Furthermore, the wire brush is fixed to the upper end of the brush handle, and the brush handle is connected to the support seat through a spring. The support seat is obliquely arranged at the bottom of the inner wall of the secondary casing.
[0011] Furthermore, the lower end of the feed hopper extends into the secondary casing. Baffle plates are symmetrically provided on both sides of the lower end of the feed hopper, and the spray head is arranged on the baffle plates.
[0012] Furthermore, a screening device is provided below the secondary crushing device, and a coarse material recovery device is provided between the screening device and the secondary crushing device; the coarse material recovery device includes a guide plate and a screw conveyor. The guide plate is obliquely arranged between the coarse material outlet of the screening device and the feed inlet of the screw conveyor, and the guide plate is connected to the screening device; the discharge outlet of the screw conveyor is connected to the side wall of the feed hopper.
[0013] Furthermore, both the pre-screening device and the screening device are vibrating screening machines. The feeding mechanism is a rod with a feeding shovel at the lower end. The guide trough is an arc-shaped trough inclined towards the secondary crushing device. The cross-sections of the guide trough and the guide plate are U-shaped. The guide plate is obliquely arranged on the side of the screw conveyor, and the discharge end of the guide plate is an arc-shaped slideway for connecting to the feed inlet of the screw conveyor.
[0014] Furthermore, a conveyor belt is provided below the fine material outlet of the screening device for conveying the crushed asphalt mixture to the stripping process for stone stripping.
[0015] Furthermore, the primary crushing device, the secondary crushing device, and the pre-screening device are arranged on a frame, and the frame is connected to a traveling mechanism.
[0016] Compared with the prior art, the technical progress achieved by the present utility model is as follows:
[0017] The utility model screens out small particle old asphalt pavement materials discharged by a scraping device through arranging a pre-screening device in front of a primary crushing device and enables the small particle old asphalt pavement materials to enter a secondary crushing device, and the large particle old asphalt pavement materials enter the primary crushing device, so that the crushing amount of the primary crushing device can be reduced and the energy consumption can be lowered; meanwhile, a material pushing mechanism is driven by the power of the primary crushing device to push the old asphalt pavement materials in a material guiding groove so as to enable the old asphalt pavement materials to smoothly enter the secondary crushing device, and the crushed old asphalt mixture enters a stripping device in a stripping process to complete the stripping of stones, thereby reducing the energy consumption of the stripping device. The utility model has a compact structure, is convenient and fast to operate, is convenient for locally crushing old asphalt pavement materials, thereby accelerating the construction progress, shortening the construction period and alleviating the traffic pressure. Description of the Drawings
[0018] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, and do not constitute a limitation to the utility model.
[0019] In the drawings:
[0020] Figure 1 is a schematic structural view of a crushing device for old asphalt pavement materials provided by an embodiment of the utility model;
[0021] Figure 2 is a schematic internal structural view of the primary crushing device and the secondary crushing device of an embodiment of the utility model;
[0022] Figure 3 is a schematic structural view of a crushing device for old asphalt pavement materials in another embodiment of the utility model;
[0023] In the figures:
[0024] 1 - primary crushing device, 11 - primary housing, 12 - primary toothed roller; 2 - secondary crushing device, 21 - secondary housing, 22 - secondary toothed roller; 3 - pre-screening device, 30 - material guiding groove; 4 - coarse material recovery device, 41 - material guiding plate, 42 - screw conveyor; 5 - spray head; 6 - wire brush; 7 - spring; 8 - support seat; 9 - baffle plate; 10 - screening device; 13 - lever; 14 - conveyor belt; 15 - frame. Detailed Embodiments
[0025] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the utility model will be described below with reference to the drawings.
[0026] As Figure 1As shown in the figure, an old asphalt pavement material crushing device includes a primary crushing device 1, a secondary crushing device 2, and a pre-screening device 3. The feed inlet of the primary crushing device 1 can be connected to the discharge outlet of a scraping device. The discharge outlet of the primary crushing device 1 is connected to the feed inlet of the secondary crushing device 2. The oversize outlet of the pre-screening device 3 is connected to the feed inlet of the primary crushing device 1. The undersize of the pre-screening device 3 is connected to the feed inlet of the secondary crushing device 2 through a guiding chute 30. The discharge outlet of the secondary crushing device 2 can be connected to a stripping device in the stripping process. Among them, the primary crushing device 1 is arranged on the top of the secondary crushing device 2, the pre-screening device 3 is arranged on the upper side of the primary crushing device 1, and a feeding mechanism is provided at the end of the roller shaft of the primary crushing device 1 for feeding the old asphalt pavement material in the guiding chute 30 to the feed inlet of the secondary crushing 2. By screening out small particles in the scraped old asphalt pavement material through the pre-screening device and directly feeding them into the secondary crushing device, and feeding large particles into the primary crushing device, the crushing amount of the primary crushing device can be reduced and energy consumption can be lowered. Using the power of the primary crushing device to drive the feeding mechanism can smoothly feed the old asphalt pavement material in the guiding chute into the secondary crushing device.
[0027] In a specific embodiment of the present invention, as Figure 2 shown, the primary crushing device 1 includes a primary housing 11 and two first toothed rollers 12 driven to rotate relatively inside by a first motor (not shown in the figure). The gap between the two first toothed rollers 12 is 40 - 50 mm. The secondary crushing device 2 includes a secondary housing 21 and two second toothed rollers 22 driven to rotate relatively inside by a second motor (not shown in the figure). The gap between the two second toothed rollers 22 is 20 - 30 mm. The two first toothed rollers 12 are used to perform preliminary crushing on large particles, and then the two second toothed rollers 22 are used for secondary crushing to meet the feeding requirements of the subsequent stripping device. Compared with using a single crushing device, it can avoid excessive energy consumption and equipment damage caused by too large a one-time crushing amount, and can effectively protect the crushing device.
[0028] As a preferred structure, the top feed port of the secondary housing 21 is provided with a feed hopper with a larger upper part and a smaller lower part, and a spray head 5 is provided at the bottom of the feed hopper; two steel wire brushes 6 are symmetrically provided on both sides of the lower part of the secondary housing 21, which are used to brush off the asphalt mixture adhered to the surface of the second gear roller 22. In the specific production, the steel wire brush 6 is fixed to the upper end of the brush handle, and the brush handle is connected to the support seat 8 through a spring 7. The support seat 8 is tilted at the bottom of the inner wall of the secondary housing 21. With the help of the spring, the wire brush root can be reduced from being broken due to excessive deflection. At the same time, the lower end of the feed hopper extends into the secondary housing 22, and baffle plates 9 are symmetrically provided on both sides of the lower end of the feed hopper, and the spray head 5 is provided on the baffle plates 9. The use of the spray head can reduce dust during the crushing process, and at the same time, the baffle plate can ensure that the old asphalt pavement material enters the gap between the two second gear rollers; the steel wire brush can be used to timely remove the asphalt mixture adhered to the surface of the second gear roller 22 to ensure the crushing effect.
[0029] Further optimize the above scheme, such as Figure 3 As shown, a screening device 10 is provided below the secondary crushing device 2, and a coarse material recovery device 4 is provided between the screening device 10 and the secondary crushing device 2; the coarse material recovery device 4 includes a guide plate 41 and a screw conveyor 42, the guide plate 41 is obliquely arranged between the coarse material outlet of the screening device 10 and the feed port of the screw conveyor 42, the guide plate 41 is connected to the screening device 10; the discharge port of the screw conveyor 42 is connected to the side wall of the feed hopper. The screening device is used to screen out the larger particles in the old asphalt mixture after the secondary crushing, and returns to the secondary crushing device through the screw conveyor for further crushing.
[0030] In the specific design, the pre-screening device 3 and the screening device 10 are both vibrating screening machines, the material-dispensing mechanism is a lever 13 with a material-dispensing shovel at the lower end, the guide trough 30 is an arc-shaped trough inclined toward the secondary crushing device 2, the cross-section of the guide trough 30 and the guide plate 41 is U-shaped, the guide plate 41 is inclinedly arranged on the side of the screw conveyor 42, and the discharge end of the guide plate 41 is an arc-shaped slideway for connecting to the feed port of the screw conveyor 42. The guide plate with this structure can guide the screened old asphalt mixture to the feed port of the screw conveyor, completing the recovery and transportation of the large particles of old asphalt mixture.
[0031] If the amount of old asphalt mixture is large, a conveyor belt 14 is provided below the fine material outlet of the screening device 10 to convey the crushed asphalt mixture to the stripping process for stone stripping. Using a conveyor belt to convey the old asphalt mixture in batches to the stripping process can improve the conveying efficiency.
[0032] During specific production, the primary crushing device 1, the secondary crushing device 2, the pre-screening device 3 and the screening device 10 are arranged on the frame 15. The material guiding plate 41 and the screw conveyor 42 are connected to the frame 15, and the frame 15 is connected to the traveling mechanism. The traveling mechanism can be a traveling wheel installed at the bottom of the frame or a movable flatbed trailer, both of which can be moved to any working location according to actual needs, with convenient and fast application, and can achieve the purpose of crushing old asphalt pavement materials on-site.
[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. An old asphalt pavement material crushing device, characterized in that: It includes a primary crushing device, a secondary crushing device and a pre-screening device. The feed inlet of the primary crushing device can be connected to the discharge outlet of a scraping device. The discharge outlet of the primary crushing device is connected to the feed inlet of the secondary crushing device. The oversize outlet of the pre-screening device is connected to the feed inlet of the primary crushing device. The undersize of the pre-screening device is connected to the feed inlet of the secondary crushing device through a guiding trough. The discharge outlet of the secondary crushing device can be connected to a stripping device in the stripping process.
2. The crushing equipment for old asphalt pavement materials according to claim 1, characterized in that: The primary crushing device is arranged on the top of the secondary crushing device. The pre-screening device is arranged on the upper side of the primary crushing device. A feeding mechanism is provided at the end of the roller shaft of the primary crushing device for feeding the old asphalt pavement materials in the guiding trough to the feed inlet of the secondary crushing device.
3. An old asphalt pavement material crushing device according to claim 2, characterized in that: The primary crushing device includes a primary casing and two first toothed rollers driven to rotate relatively by a first motor inside. The gap between the two first toothed rollers is 40 - 50 mm. The secondary crushing device includes a secondary casing and two second toothed rollers driven to rotate relatively by a second motor inside. The gap between the two second toothed rollers is 20 - 30 mm.
4. An old asphalt pavement material crushing device according to claim 3, characterized in that: At the feed inlet at the top of the secondary casing, there is a feed hopper with a larger upper part and a smaller lower part. A spray head is provided at the bottom of the feed hopper. On both sides of the lower part of the secondary casing, two wire brushes are symmetrically provided for brushing off the asphalt mixture adhered to the surface of the second toothed rollers.
5. An old asphalt pavement material crushing device according to claim 4, characterized in that: The wire brush is fixed to the upper end of a brush handle. The brush handle is connected to a support seat through a spring. The support seat is inclined and arranged at the bottom of the inner wall of the secondary casing.
6. The crushing equipment for old asphalt pavement materials according to claim 4, characterized in that: The lower end of the feed hopper extends into the secondary casing. On both sides of the lower end of the feed hopper, baffle plates are symmetrically provided. The spray head is arranged on the baffle plates.
7. An old asphalt pavement material crushing device according to claim 2, characterized in that: A screening device is provided below the secondary crushing device. A coarse material recovery device is provided between the screening device and the secondary crushing device. The coarse material recovery device includes a guiding plate and a screw conveyor. The guiding plate is inclined and arranged between the coarse material outlet of the screening device and the feed inlet of the screw conveyor. The guiding plate is connected to the screening device. The discharge outlet of the screw conveyor is connected to the side wall of the feed hopper.
8. An old asphalt pavement material crushing device according to claim 7, characterized in that: Both the pre-screening device and the screening device are vibrating screening machines. The feeding mechanism is a rod with a feeding shovel at the lower end. The guiding trough is an arc-shaped trough inclined towards the secondary crushing device. The cross-sections of the guiding trough and the guiding plate are U-shaped. The guiding plate is inclined and arranged on the side of the screw conveyor. The discharge end of the guiding plate is an arc-shaped slideway for connecting to the feed inlet of the screw conveyor.
9. An old asphalt pavement material crushing device according to claim 7, characterized in that: A conveyor belt is provided below the fine material outlet of the screening device for conveying the crushed asphalt mixture to the stripping process for stone stripping.
10. A crushing device for old asphalt pavement materials according to any one of claims 1-9, characterized in that: The primary crushing device, the secondary crushing device and the pre-screening device are arranged on a frame. The frame is connected to a traveling mechanism.