Arid desert region asphalt pavement screening method

Abstract

The invention provides an arid desert region asphalt pavement screening method, and belongs to the technical field of asphalt pavement screening. Comprising a first frame body, a screening device body is installed at the top of the first frame body, a second frame body is installed at the top of the first frame body, first shells are fixedly connected to the two sides of the top of the second frame body, a second shell is installed at the top of the first shell, and a screening net body is installed in the screening device body. According to the multi-stage screening device, by arranging the rotation adjusting mechanism, multi-stage screening treatment of the device can be achieved through a vibration machine, a vibration machine connecting part and a screening barrel driving mechanism, meanwhile, vibration screening and rotation screening are used in cooperation, the screening efficiency of the device is higher, and by means of the rotation adjusting mechanism, the screening efficiency of the device is improved. And the size of the particle size capable of being screened by the screening device is adjusted, so that the aperture of the screen can be flexibly adjusted in combination with the specific requirements of the asphalt pavement in the arid desert region in the screening process.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pavement screening, and particularly relates to a method for screening asphalt pavement in arid desert areas. Background Art

[0002] In recent years, with the increase in highway construction and maintenance requirements, asphalt pavement recycling technology has gradually received attention. Especially in arid desert areas, roads are severely eroded by wind and sand, with a fragile ecological environment, scarce resources, and high requirements for the quality of asphalt mixtures during road construction. In road infrastructure construction, asphalt pavements account for a significant proportion.

[0003] During the production process of asphalt mixtures, due to various factors such as the service life of the pavement, long-term storage of asphalt mixtures, maintenance conditions of the original pavement, and recycling processes, asphalt mixtures without pretreatment such as crushing and screening have significant variability. This variability causes the mixtures to not be directly applicable to mix design and production, thus affecting the quality and service life of asphalt pavements. Therefore, it is necessary to screen the recycled asphalt pavements.

[0004] In the existing vibrating screening process, the aperture of the screening mesh is generally fixed. If screens of different particle sizes are needed, disassembly and installation tools are required to replace the screening mesh, which is a relatively cumbersome operation and seriously affects the screening efficiency. Therefore, this application provides a method for screening asphalt pavement in arid desert areas to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for screening asphalt pavement in arid desert areas. By setting a rotation adjustment mechanism, not only can the device perform multi-stage screening through a vibrating machine, a vibrating machine connecting part, and a screening barrel driving mechanism, but also the combined use of vibrating screening and rotating screening can make the screening efficiency of the device higher. And this device can adjust the particle size that can be screened by the screening device through the rotation adjustment mechanism. Through the above settings, the problem of the relatively troublesome replacement of filter meshes with different apertures in the prior art can be solved.

[0006] To solve the above technical problem, the present invention provides the following technical solutions:

[0007] A method for screening asphalt pavement in arid desert areas includes the following steps:

[0008] Step 1: Initially crush the recycled asphalt pavement materials through a rake-tooth crusher or a flexible crusher to break up the lumps, and then heat and dry the crushed asphalt pavement materials to a constant weight at a heating temperature of 60°C.

[0009] Step 2: Then check the equipment to ensure the normal operation of the vibrating motor, the screen, and the conveyor belt.

[0010] Step 3: Coarsely screen the dried asphalt pavement materials using a vibrating screening device to screen out coarse materials larger than a specific particle size, and then finely screen the materials smaller than the specific particle size through a high-frequency screen to further screen out materials with smaller particle sizes. As needed, set up multiple layers of screen meshes to screen the materials into multiple particle size grades;

[0011] Step 4: The screened finished materials are output through a conveyor belt and stacked separately or enter the subsequent processing process. The oversized materials generated during the screening process are returned to the crusher through a chute or conveyor belt for re-crushing;

[0012] Step 5: Calculate the gradation of the asphalt pavement materials based on the screening results to ensure that it meets the design requirements, and conduct moisture content, asphalt content, and sand equivalent tests on the screened asphalt pavement materials to ensure that their quality meets the requirements for recycling;

[0013] The vibrating screening device described in Step 3 includes a first frame body. A screening device main body is installed on the top of the first frame body. A second frame body is installed on the top of the first frame body. Both sides of the top of the second frame body are fixedly connected with a first outer shell. A second outer shell is installed on the top of the first outer shell. A screening mesh body is installed inside the screening device main body. A vibrator connecting part is provided on the outer wall of one side of the screening device main body. A screening bucket driving mechanism is installed on the second frame body;

[0014] A rotation adjustment mechanism, which is used to adjust the screenable particle size of the screening device and is connected to the first outer shell.

[0015] Optionally, the rotation adjustment mechanism includes a screening bucket body installed inside the first outer shell. Both sides of the screening bucket body are installed with baffles. First rolling brushes are installed on the inner walls of both sides of the baffles. Second rolling brushes are installed on the outer walls of both sides of the baffles. Installation groove bodies are provided at both ends of the first rolling brushes and the second rolling brushes. First connecting rods are installed on both sides of the baffle far from the center position of the screening bucket body. One end of the first connecting rod far from the center position of the screening bucket body is fixedly connected with a second connecting rod. One end of the second connecting rod close to the second rolling brush is fixedly connected with a third connecting rod. A hydraulic rod body is installed on the top of one side of the first frame body. A fourth connecting rod is fixedly connected to the side of the baffle close to the hydraulic rod body. A rotating block is fixedly connected to the fourth connecting rod.

[0016] Optionally, an internal thread groove is provided on the outer wall of the first connecting rod, and an installation groove adapted to the shape of the first connecting rod is provided on the retaining piece. The first connecting rod, the second connecting rod, and the third connecting rod are integrally formed, and the first connecting rod, the second connecting rod, and the third connecting rod are made of stainless steel.

[0017] Optionally, one end of the second connecting rod away from the first connecting rod has a tendency to approach the inner wall of the screening barrel body, and one end of the third connecting rod away from the first connecting rod has a tendency to move away from the outer wall of the screening barrel body. A first hole groove is provided on the screening barrel body, a second hole groove is provided on the screening barrel body, and a third hole groove is provided on the screening barrel body.

[0018] Optionally, a weakening groove adapted to the shape of the second rolling brush is provided on one side of the first housing close to the rotating block, and limiting grooves adapted to the shape of the first rolling brush are annularly and equidistantly provided on the inner wall of the screening barrel body.

[0019] Optionally, the screening mesh body is an arc-shaped structure protruding towards the bottom of the first frame.

[0020] Optionally, the retaining piece, the rotating block, and the fourth connecting rod are integrally formed structures, the retaining piece, the rotating block, and the fourth connecting rod are made of plastic, lightweight grooves are provided at the top and bottom of the rotating block, and grooves are provided on both sides of the rotating block.

[0021] Optionally, first skeletons are installed on both sides of the top of the first frame. A second skeleton is fixedly connected to one side of the first skeleton close to the fourth connecting rod. The first skeleton and the second skeleton are both made of plastic. Side pieces are installed on the first skeleton and the second skeleton, and the side pieces are made of soft cloth material.

[0022] Optionally, the second skeleton is an arc-shaped structure protruding away from the fourth connecting rod direction, and a weakening portion is provided on the second skeleton.

[0023] Optionally, there are two first skeletons. The structure formed by the two first skeletons on the same side of the first frame and one second skeleton is a triangle. One ends of the two first skeletons away from the second skeleton are rotatably connected together through a rotating shaft, and one ends of the two first skeletons close to the second skeleton are fixedly connected to the second skeleton.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] In the above solution, by setting up a rotation adjustment mechanism, not only can the device achieve multi-stage screening through the vibrating machine, the vibrating machine connection part, and the screening barrel drive mechanism, but also the combined use of vibration screening and rotation screening makes the screening efficiency of the device higher. Moreover, this device can adjust the size of the screenable particle size of the screening device by using the rotation adjustment mechanism. Thus, during the screening process, in combination with the specific requirements of asphalt pavements in arid desert areas, with the transformable screen structure, the aperture of the screen can be flexibly adjusted according to the particle size requirements, thereby accelerating the screening efficiency, further improving the practicality of the device. Additionally, the rotation adjustment mechanism can also quickly clean the screening mesh of the screening structure to ensure that the device continuously maintains a good screening effect, and it has a simple structure and is convenient and fast to use.

[0026] By providing a baffle in the rotation adjustment mechanism, not only can the baffle be rotated to different positions to block the openings at different positions on the screening barrel body. Since there are three-sized openings oppositely arranged on the first hole groove, and the inner wall areas of the two baffles are equal to two-thirds of the outer wall area of the screening barrel body, only one-sized screening hole can be in an open state after the baffle is adjusted. Thus, the screening barrel body can be used for screening three particle sizes, making the application range of the device relatively wide. Moreover, with a simple structure and the coordinated use of the structures, the use effect of the rotation adjustment mechanism is effectively better and it is convenient to use.

[0027] By providing a first brush roller and a second brush roller in the rotation adjustment mechanism, not only when the inner wall of the screening barrel body and the screening mesh body are blocked and affect screening, can the hydraulic rod body be controlled to make the screening barrel body parallel to the screening mesh body, and at the same time make the bottom of the first housing close to the two side edges of the screening mesh body, so that the centers of the screening mesh body and the screening barrel body coincide. When the baffle is rotated, the first brush roller and the baffle rotate accordingly. Affected by the restoring force of the second connecting rod, the first brush roller closely adheres to the inner wall of the screening barrel body, enabling the first brush roller to quickly clean the inner wall of the screening barrel body with a good cleaning effect. At the same time, when the third connecting rod rotates to the side close to the screening mesh body, affected by the restoring force of the third connecting rod, the second brush roller installed on the third connecting rod contacts and slightly presses the screening mesh body, thereby enabling the screening mesh body to be cleaned together. The coordinated use of the structures makes the cleaning efficiency of this device relatively high, thus ensuring the screening efficiency of this device.

[0028] By providing a second connecting rod and a third connecting rod inside the rotation adjustment mechanism, not only can the deformation tendency of the second connecting rod be utilized to apply a force to the first brush roller installed thereon to approach the inner wall of the screening barrel body, so that the first brush roller can closely fit the screening barrel body during use, but also by the combined use of the second connecting rod, the first brush roller and the baffle, the first brush roller and the baffle can clamp the screening barrel body, so that the baffle can be stably fixed on the screening barrel body without external force, and when the screening barrel body rotates for screening, the screening barrel body and the baffle remain relatively stationary, thus ensuring the screening effect of the screening barrel body on different particle sizes. And by the deformation tendency of the third connecting rod, when the screening barrel body is used for screening, the restoring elastic force of the third connecting rod makes the second brush roller closely fit the inner wall of the first housing. And when the screening barrel body rotates, the baffle rotates with the screening barrel body, and the first brush roller and the second brush roller on the baffle rotate with it. At this time, when the second brush roller fits the inner wall of the first housing, the second brush roller rolls along the inner wall of the first housing, so that the inner wall of the first housing is cleaned to a certain extent, and the combined use of the structures effectively makes the use effect of the rotation adjustment mechanism better, and the structure is simple and convenient to use.

[0029] In summary, the present device can not only quickly switch the screenable particle size of the screening barrel body through the combined use of the rotation adjustment mechanism and its various components, so that the device can be used under different requirements, but also quickly clean the screening barrel body and the screening mesh body simultaneously when the screening holes are blocked. And the structure of the present device is simple, convenient and fast to use, and the production cost of the device is relatively low, and the practicability is good and it is convenient to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0031] Figure 1 is a first perspective three-dimensional structural schematic diagram of the asphalt pavement screening device in arid desert areas;

[0032] Figure 2 is Figure 1 the enlarged structural schematic diagram at A in

[0033] Figure 3 is a second perspective three-dimensional structural schematic diagram of the asphalt pavement screening device in arid desert areas;

[0034] Figure 4 is a structural schematic diagram of the asphalt pavement screening device in arid desert areas;

[0035] Figure 5Schematic three-dimensional structure diagram of the cooperation between the first outer shell and the sieve barrel body;

[0036] Figure 6 Schematic three-dimensional structure diagram of the cooperation between the first rotary brush and the second rotary brush;

[0037] Figure 7 For Figure 6 Enlarged structure diagram at position B in

[0038] Figure 8 Schematic three-dimensional structure diagram of the folding of the asphalt pavement screening device in arid desert areas;

[0039] Figure 9 Schematic three-dimensional sectional structure diagram of the folding of the asphalt pavement screening device in arid desert areas;

[0040] Figure 10 Schematic three-dimensional structure diagram of the cooperation between the baffle and the sieve barrel body;

[0041] Figure 11 Schematic structure diagram of the cooperation between the baffle and the sieve barrel body.

[0042] Reference numerals:

[0043] 1. First frame; 2. Second frame; 3. First outer shell; 4. Second outer shell; 5. Sieve mesh body; 6. Sieve barrel body; 7. Baffle; 8. First rotary brush; 9. Second rotary brush; 10. First connecting rod; 11. Second connecting rod; 12. Third connecting rod; 13. Fourth connecting rod; 14. Rotating block; 15. Lightweight groove; 16. First hole groove; 17. Second hole groove; 18. Third hole groove; 19. Hydraulic rod body; 20. Side plate; 21. First framework; 22. Second framework; 23. Weakening part; 24. Limiting groove; 25. Weakening groove; 26. Vibration machine connecting part; 27. Sieve barrel driving mechanism; 28. Installation groove body.

[0044] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0045] The following describes in detail a method for screening asphalt pavement in arid desert areas provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0046] It should be noted that in the specification, the indication of "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. means that the described embodiment may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining an embodiment to describe a specific feature, structure or characteristic, combining other embodiments, whether or not it is explicitly described, the implementation of such feature, structure or characteristic should be within the knowledge scope of those skilled in the relevant art.

[0047] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but instead, at least in part depending on the context, allowing for the existence of other factors that may not be explicitly described.

[0048] It can be understood that the meanings of "on", "above" and "over" in the present invention should be interpreted in the broadest manner, such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intermediate features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intermediate features or layers therebetween.

[0049] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship between one element or feature and another or more elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive words used herein can be similarly interpreted accordingly.

[0050] As Figures 1 to 4 shown, an embodiment of the present invention provides a method for screening asphalt pavement in arid desert areas, including the following steps:

[0051] Step 1: The recycled asphalt pavement materials are preliminarily crushed by a rake-tooth crusher or a flexible crusher to break up the lumps, and then the crushed asphalt pavement materials are heated and dried to a constant weight, with the heating temperature being 60 °C.

[0052] Step 2: Then, check the equipment to ensure the normal operation of the vibration motor, the screen, and the conveyor belt.

[0053] Step 3: Coarsely screen the dried asphalt pavement materials using a vibrating screening device to screen out coarse materials larger than a specific particle size, and then finely screen the materials smaller than the specific particle size through a high-frequency screen to further screen out materials with smaller particle sizes. As needed, set up multiple layers of screening meshes to screen the materials into multiple particle size grades;

[0054] Step 4: The screened finished materials are output through a conveyor belt, stacked separately or sent to subsequent processing procedures. The oversized materials generated during the screening process are returned to the crusher through a chute or conveyor belt for re-crushing;

[0055] Step 5: Calculate the gradation of the asphalt pavement materials based on the screening results to ensure that it meets the design requirements, and conduct moisture content, asphalt content, and sand equivalent tests on the screened asphalt pavement materials to ensure that their quality meets the requirements for recycling;

[0056] In Step 3, the vibrating screening device includes a first frame body 1. A screening device main body is installed at the top of the first frame body 1. A second frame body 2 is installed at the top of the first frame body 1. Both sides of the top of the second frame body 2 are fixedly connected with a first outer shell 3. A second outer shell 4 is installed at the top of the first outer shell 3. A screening mesh body 5 is installed inside the screening device main body. A vibrator connection part 26 is provided on the outer wall of one side of the screening device main body. A screening bucket driving mechanism 27 is installed on the second frame body 2;

[0057] A rotation adjustment mechanism is used to adjust the screenable particle size of the screening device. The rotation adjustment mechanism is connected to the first outer shell 3. A hydraulic rod body 19 is installed at the top of one side of the first frame body 1. The first frame body 1 and the second frame body 2 are rotatably connected through a rotating shaft on the side away from the hydraulic rod body 19. When in use, install the vibrator on one side of the vibrator connection part 26. The vibrator, the vibrator connection part 26, and the screening bucket driving mechanism 27 are existing mature technologies, and their working principles and specific structures will not be elaborated here in detail. The vibrator, the vibrator connection part 26, and the screening bucket driving mechanism 27 are used for the multi-stage screening process of the device. This device simultaneously uses the combination of vibration screening and rotation screening, making the screening efficiency of the device higher. And this device can adjust the size of the screenable particle size of the screening device by using the rotation adjustment mechanism. Thus, during the screening process, combined with the specific requirements of the asphalt pavement in arid desert areas, using the variable screen structure, according to the particle size requirements, flexibly adjust the aperture of the screening mesh, thereby accelerating the screening efficiency, and further making the practicability of the device better. And the rotation adjustment mechanism can also quickly clean the screening mesh of the screening structure to ensure that the device continuously maintains a good screening effect. And the structure is simple and convenient to use quickly.

[0058] Such as Figures 2 to 7As shown, the rotation adjustment mechanism includes a screening barrel body 6 installed in the first housing 3. On both sides of the screening barrel body 6, baffles 7 are installed. On the inner walls of both sides of the baffle 7, first rotary brushes 8 are installed. On the outer walls of both sides of the baffle 7, second rotary brushes 9 are installed. On both sides of the baffle 7 far from the center position of the screening barrel body 6, first connecting rods 10 are installed. One end of the first connecting rod 10 far from the center position of the screening barrel body 6 is fixedly connected to a second connecting rod 11. One end of the second connecting rod 11 close to the second rotary brush 9 is fixedly connected to a third connecting rod 12. One side of the baffle 7 close to the hydraulic rod body 19 is fixedly connected to a fourth connecting rod 13. A rotating block 14 is fixedly connected to the fourth connecting rod 13. A first hole slot 16 is opened on the screening barrel body 6. A second hole slot 17 is opened on the screening barrel body 6. A third hole slot 18 is opened on the screening barrel body 6. An internal thread groove is opened on the outer wall of the first connecting rod 10. An installation slot matching the shape of the first connecting rod 10 is opened on the baffle 7, so that the first connecting rod 10 can be quickly and stably installed on the baffle 7 for use. Installation slots 28 are opened at both ends of the first rotary brush 8 and the second rotary brush 9. After the first connecting rod 10 is installed, the first rotary brush 8 can be quickly installed on two second connecting rods 11 arranged oppositely, and the second rotary brush 9 can be quickly installed on two third connecting rods 12 arranged oppositely. The first connecting rod 10, the second connecting rod 11 and the third connecting rod 12 are integrally formed. The first connecting rod 10, the second connecting rod 11 and the third connecting rod 12 are made of stainless steel. Through the integrally formed mechanism, not only is its production process simpler, but it is also convenient to carry. And by using the cooperation of the structure and the material, its stability is better during use, thus ensuring the screening effect of the device.

[0059] During use, by controlling the screening barrel driving mechanism 27, the screening barrel body 6 is stopped from rotating and the screening barrel body 6 is kept in a relatively stable state. Then the user holds the rotating block 14 by hand and rotates the rotating block 14. The rotating block 14 drives the fourth connecting rod 13 to rotate, thereby driving the baffle 7 fixedly connected to the fourth connecting rod 13 to rotate, and rotating the baffle 7 to different positions, so that the openings at different positions on the screening barrel body 6 are blocked. Since three sizes of openings are oppositely opened on the first hole slot 16, and the inner wall area of the two baffles 7 is equal to two-thirds of the outer wall area of the screening barrel body 6, only one size of screening hole is allowed to be in an open state after the baffle 7 is adjusted, so that the screening barrel body 6 can be used for screening three particle sizes, thus making the applicable range of the device relatively wide, and the device is convenient and fast to adjust. During the adjustment process, the second connecting rod 11 and the third connecting rod 12 are deformed by force, first sliding out of the corresponding limit slots 24, and then moving again to align with other limit slots 24.

[0060] As Figures 1 to 5 and Figures 8 to 11As shown, one end of the second connecting rod 11 away from the first connecting rod 10 has a tendency to approach the inner wall of the screening barrel body 6, and one end of the third connecting rod 12 away from the first connecting rod 10 has a tendency to move away from the outer wall of the screening barrel body 6. By utilizing the deformation tendency of the second connecting rod 11, a force is exerted on the first brush roller 8 mounted thereon to approach the inner wall of the screening barrel body 6, so that the first brush roller 8 can closely fit the screening barrel body 6 during use. Moreover, by using the cooperation of the second connecting rod 11, the first brush roller 8 and the baffle 7, the first brush roller 8 and the baffle 7 can clamp the screening barrel body 6, so that the baffle 7 is stably fixed on the screening barrel body 6 without external force. When the screening barrel body 6 rotates for screening, the screening barrel body 6 and the baffle 7 remain relatively stationary, thus ensuring the screening effect of the screening barrel body 6 on different particle sizes. And by utilizing the deformation tendency of the third connecting rod 12, when the screening barrel body 6 is used for screening, the restoring force of the third connecting rod 12 makes the second brush roller 9 closely fit the inner wall of the first housing 3. When the screening barrel body 6 rotates, the baffle 7 rotates with the screening barrel body 6, and the first brush roller 8 and the second brush roller 9 on the baffle 7 rotate with it. At this time, when the second brush roller 9 fits the inner wall of the first housing 3, the second brush roller 9 rolls along the inner wall of the first housing 3, so that the inner wall of the first housing 3 is cleaned to a certain extent. The first housing 3 is transparent, and the setting of the first housing 3 facilitates the protection of both sides of the device. At the same time, it is convenient to observe the screening situation inside the device, preventing the problem that the device fails to be detected in time when a malfunction occurs. And the cooperation of the first housing 3 and the second housing 4 also greatly reduces the dispersion of dust and reduces the dust pollution during the screening process. Moreover, the above structure is relatively simple, and the cooperation between the structures further makes the use effect of the device better.

[0061] When the inner wall of the screening barrel body 6 and the screening mesh body 5 are blocked and affect screening, the hydraulic rod body 19 is started, so that one side of the first housing 3 and the screening barrel body 6 close to the hydraulic rod body 19 descends, making the screening barrel body 6 parallel to the screening mesh body 5. At the same time, the bottom of the first housing 3 approaches the two side edges of the screening mesh body 5, making the screening mesh body 5 coincide with the center of the screening barrel body 6. The baffle 7 is rotated, so that the first brush roller 8 and the baffle 7 rotate therewith. Affected by the restoring force of the second connecting rod 11, the first brush roller 8 closely fits the inner wall of the screening barrel body 6, and the inner wall of the screening barrel body 6 can be quickly cleaned by the first brush roller 8, and the cleaning effect is better. At the same time, when the third connecting rod 12 rotates to the side close to the screening mesh body 5, under the action of the restoring force of the third connecting rod 12, the second brush roller 9 mounted on the third connecting rod 12 contacts and slightly presses the screening mesh body 5, so that the screening mesh body 5 can be cleaned together. The cooperation between the structures makes the cleaning efficiency of this device relatively high, thus ensuring the screening efficiency of this device.

[0062] Furthermore, the screening mesh body 5 is an arc-shaped structure protruding towards the bottom of the first frame body 1. After the hydraulic rod body 19 lowers one side of the first outer shell 3 and the screening barrel body 6, the screening barrel body 6 remains parallel to the screening mesh body 5. The baffle 7, the rotating block 14, and the fourth connecting rod 13 are integrally formed. The baffle 7, the rotating block 14, and the fourth connecting rod 13 are made of plastic. The integrally formed structure is convenient for production, has good stability at the structural connection, and the plastic material is light in weight and relatively low in cost. Lightweight grooves 15 are provided at the top and bottom of the rotating block 14, and grooves are provided on both sides of the rotating block 14. Through the shape design of the rotating block 14, it is convenient for the user to hold the rotating block 14, so that there will be no side slip during the process of rotating the rotating block 14, and the structure is simple and convenient to operate. A weakening groove 25 adapted to the shape of the second brush 9 is provided on one side of the first outer shell 3 close to the rotating block 14. The first outer shell 3 has a tendency to approach the screening barrel body 6 in the natural state, and the weakening groove 25 enhances the deformation tendency of the first outer shell 3 to approach the screening barrel body 6. Thus, the second brush 9 installed on the third connecting rod 12 can fit more closely to the inner wall of the first outer shell 3 when approaching the inner wall of the first outer shell 3. Limiting grooves 24 adapted to the shape of the first brush 8 are provided at equal intervals in a ring on the inner wall of the screening barrel body 6, which is convenient to use the cooperation of the first brush 8 and the limiting grooves 24 to quickly position the baffle 7 to the required positions for screening different particle sizes. And the above structure is relatively simple, and the cooperation between the structures makes the use effect of the rotation adjustment mechanism better.

[0063] Such as Figure 1 , Figure 3 and Figure 8As shown in the figure, first skeletons 21 are installed on both sides of the top of the first frame body 1. A second skeleton 22 is fixedly connected to one side of the first skeleton 21 close to the fourth connecting rod 13. Both the first skeleton 21 and the second skeleton 22 are made of plastic materials. Side pieces 20 are installed on the first skeleton 21 and the second skeleton 22. The side pieces 20 are made of soft cloth materials. The second skeleton 22 is an arc-shaped structure protruding away from the fourth connecting rod 13. A weakening part 23 is formed on the second skeleton 22. There are two first skeletons 21. The structure formed by the two first skeletons 21 on the same side of the first frame body 1 and one second skeleton 22 is a triangle. One ends of the two first skeletons 21 away from the second skeleton 22 are rotatably connected together through a rotating shaft. One ends of the two first skeletons 21 close to the second skeleton 22 are fixedly connected to the second skeleton 22. One first skeleton 21 is fixed to the top of the first frame body 1, and the other first skeleton 21 is fixed to the bottom of the second frame body 2. By using the rotatably connected first skeletons 21, the first frame body 1 and the second frame body 2 are rotatably connected together. By using the cooperation of the first skeleton 21, the second skeleton 22 and the hydraulic rod body 19, when the screening barrel body 6 is horizontal with the ground, the hydraulic rod body 19 extends to the longest. The first skeleton 21 and the second skeleton 22 fully unfold the side pieces 20. The first connecting rod 10 is used to block both sides of the top of the first frame body 1 to start the dust-proof function. When the hydraulic rod body 19 is retracted to the shortest and the screening barrel body 6 is parallel to the screening net body 5, the second skeleton 22 deforms and bends from the weakening part 23, and the side pieces 20 are retracted between the two first skeletons 21, which is convenient for the baffle 7 and the first brush 8 and the second brush 9 installed thereon to clean the inner wall of the screening barrel body 6 and the screening net body 5 at the same time. Moreover, the above structure is simple and convenient to use quickly.

[0064] The working principle of the technical solution provided by the present invention is as follows:

[0065] In use, first install the two first connecting rods 10 on a baffle 7. Then, the user holds the rotating block 14 and installs the baffle 7 fixedly connected to the rotating block 14 through the fourth connecting rod 13 on the screening barrel body 6, so that the inner wall of the baffle 7 fits against the outer wall of the screening barrel body 6. The two baffles 7 are naturally clamped on the screening barrel body 6 under the action of the fourth connecting rod 13. Then, pull the two second connecting rods 11 arranged oppositely to deform them, place the first rolling brush 8 between the two second connecting rods 11, and then release the second connecting rods 11 to make the second connecting rods 11 rebound to clamp the first rolling brush 8, and insert the end of the second connecting rod 11 into the installation groove body 28 opened on the second rolling brush 9, so as to quickly connect the installation groove body 28 with the baffle 7. Similarly, pull the two third connecting rods 12 arranged oppositely to deform them, then place the second rolling brush 9 between the two third connecting rods 12, and then release the third connecting rods 12 to make the third connecting rods 12 rebound to clamp the second rolling brush 9. At the same time, insert the end of the third connecting rod 12 into the installation groove body 28 opened on the second rolling brush 9, so as to quickly install the first rolling brush 8 on the two second connecting rods 11 arranged oppositely, and quickly install the second rolling brush 9 on the two third connecting rods 12 arranged oppositely. Then, connect the vibrator to the vibrator connecting part 26.

[0066] After the device is installed, the screening bucket body 6 is maintained in a relatively stable state by controlling the screening bucket driving mechanism 27. Then, the user holds the rotating block 14 with the hand and rotates the rotating block 14. The rotating block 14 drives the fourth connecting rod 13 to rotate, so that the baffle 7 fixedly connected to the fourth connecting rod 13 rotates. By rotating the baffle 7 to different positions, the openings at different positions on the screening bucket body 6 are blocked. Since three sizes of openings are oppositely arranged on the first hole groove 16, and the inner wall areas of the two baffles 7 are equal to two-thirds of the outer wall area of the screening bucket body 6, only one size of screening hole is allowed to be in an open state after the baffle 7 is adjusted. Thus, the screening bucket body 6 can be used for screening three particle sizes, making the applicable range of the device relatively wide. Moreover, the device is convenient and fast to adjust. During the adjustment process, the second connecting rod 11 and the third connecting rod 12 are deformed by force. First, they slide out of the corresponding limiting grooves 24, and then move again to align with other limiting grooves 24, so as to limit the first brush 8 by using the limiting grooves 24. Utilizing the deformation tendency of the second connecting rod 11, the second connecting rod 11 applies a force to the first brush 8 installed thereon to approach the inner wall of the screening bucket body 6. Thus, the first brush 8 can closely fit the screening bucket body 6 during use. And by using the cooperation of the second connecting rod 11, the first brush 8 and the baffle 7, the first brush 8 and the baffle 7 can clamp the screening bucket body 6, so that the baffle 7 is stably fixed on the screening bucket body 6 without external force, and when the screening bucket body 6 rotates for screening, the screening bucket body 6 and the baffle 7 remain relatively stationary, thus ensuring the screening effect of the screening bucket body 6 for different particle sizes. And by using the deformation tendency of the third connecting rod 12, when the screening bucket body 6 is used for screening, the restoring force of the third connecting rod 12 makes the second brush 9 closely fit the inner wall of the first housing 3. And when the screening bucket body 6 rotates, the baffle 7 rotates with the screening bucket body 6, and the first brush 8 and the second brush 9 on the baffle 7 rotate with it. At this time, when the second brush 9 fits the inner wall of the first housing 3, the second brush 9 rolls along the inner wall of the first housing 3, so that the inner wall of the first housing 3 is cleaned to a certain extent. The first housing 3 is transparent. The setting of the first housing 3 facilitates the protection of both sides of the device, and at the same time is convenient for observing the screening situation inside the device, preventing the problem that the device fails to be detected in time when a failure occurs. And the cooperation of the first housing 3 and the second housing 4 also greatly reduces the dispersion of dust and reduces the dust pollution during the screening process. And the above structure is relatively simple, and the cooperation between the structures further makes the use effect of the device better.When the inner wall of the screening barrel body 6 and the screening mesh body 5 are blocked and affect screening, start the hydraulic rod body 19 to lower the side of the first housing 3 and the screening barrel body 6 close to the hydraulic rod body 19, making the screening barrel body 6 parallel to the screening mesh body 5. At the same time, make the bottom of the first housing 3 close to the two side edges of the screening mesh body 5, so that the centers of the screening mesh body 5 and the screening barrel body 6 coincide. Rotate the baffle 7, and the first brush roller 8 and the baffle 7 will rotate accordingly. Affected by the restoring force of the second connecting rod 11, the first brush roller 8 closely adheres to the inner wall of the screening barrel body 6, which can quickly clean the inner wall of the screening barrel body 6 and has a good cleaning effect. At the same time, when the third connecting rod 12 rotates to the side close to the screening mesh body 5, affected by the restoring force of the third connecting rod 12, the second brush roller 9 installed on the third connecting rod 12 contacts the screening mesh body 5 and produces a slight extrusion, so that the screening mesh body 5 can be cleaned together. The cooperation between the structures makes the cleaning efficiency of this device relatively high, thus ensuring the screening efficiency of this device. And by using the cooperation of the first skeleton 21, the second skeleton 22 and the hydraulic rod body 19, when the screening barrel body 6 is horizontal with the ground, the hydraulic rod body 19 extends to the longest, and the first skeleton 21 and the second skeleton 22 fully unfold the side piece 20, using the first connecting rod 10 to block the two sides of the top of the first frame body 1 to start the dust-proof function. When the hydraulic rod body 19 is retracted to the shortest and the screening barrel body 6 is parallel to the screening mesh body 5, the second skeleton 22 deforms and bends from the weakening part 23, and the side piece 20 is retracted between the two first skeletons 21, which is convenient for the baffle 7 and the first brush roller 8 and the second brush roller 9 installed thereon to clean the inner wall of the screening barrel body 6 and the screening mesh body 5 at the same time. And the above structure is simple and convenient to use.

[0067] This invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of this invention. To enable the public to have a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention. However, those skilled in the art can fully understand this invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of this invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0068] The above are only the preferred embodiments of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. A screening method for asphalt pavement in arid desert areas, characterized in that, It includes the following steps: Step 1: The recycled asphalt pavement materials are preliminarily crushed by a rake crusher or a flexible crusher to break up the lumps, and then the crushed asphalt pavement materials are heated and dried to a constant weight at a heating temperature of 60 °C. Step 2: Then, check the equipment to ensure the normal operation of the vibration motor, screen, and conveyor belt. Step 3: The dried asphalt pavement materials are roughly screened by using a vibrating screening device to screen out the coarse materials larger than a specific particle size, and then the materials smaller than the specific particle size are finely screened by a high-frequency screen to further screen out smaller particle size materials. According to needs, multiple layers of screen meshes are set to screen the materials into multiple particle size grades. Step 4: The screened finished materials are output through the conveyor belt, stacked separately or sent to the subsequent treatment process. The oversized materials generated during the screening process are returned to the crusher through the chute or conveyor belt for re-crushing. Step 5: Calculate the gradation of the asphalt pavement materials according to the screening results to ensure that it meets the design requirements, and the screened asphalt pavement materials are tested for moisture content, asphalt content, and sand equivalent to ensure that their quality meets the requirements for recycling. The vibrating screening device described in Step 3 includes a first frame body. A screening device main body is installed at the top of the first frame body. A second frame body is installed at the top of the first frame body. First outer shells are fixedly connected to both sides of the top of the second frame body. A second outer shell is installed at the top of the first outer shell. A screening mesh body is installed inside the screening device main body. A vibrator connection part is provided on the outer wall of one side of the screening device main body. A screening bucket driving mechanism is installed on the second frame body. A rotation adjustment mechanism, which is used to adjust the screenable particle size of the screening device and is connected to the first outer shell.

2. The asphalt pavement screening method in the arid desert area according to claim 1, characterized in that The rotation adjustment mechanism includes a screening bucket body installed inside the first outer shell. Baffle plates are installed on both sides of the screening bucket body. First rotary brushes are installed on the inner walls of both sides of the baffle plates. Second rotary brushes are installed on the outer walls of both sides of the baffle plates. Installation groove bodies are opened at both ends of the first rotary brushes and the second rotary brushes. First connecting rods are installed on both sides of the baffle plate far from the center position of the screening bucket body. One end of the first connecting rod far from the center position of the screening bucket body is fixedly connected to a second connecting rod. One end of the second connecting rod close to the second rotary brush is fixedly connected to a third connecting rod. A hydraulic rod body is installed at the top of one side of the first frame body. A fourth connecting rod is fixedly connected to the side of the baffle plate close to the hydraulic rod body. A rotating block is fixedly connected to the fourth connecting rod.

3. The asphalt pavement screening method in the arid desert area according to claim 2, characterized in that An internal thread groove is opened on the outer wall of the first connecting rod. An installation groove adapted to the shape of the first connecting rod is opened on the baffle plate. The first connecting rod, the second connecting rod, and the third connecting rod are integrally formed and are made of stainless steel.

4. The asphalt pavement screening method in arid desert areas according to claim 2, wherein One end of the second connecting rod away from the first connecting rod has a tendency to approach the inner wall of the screening barrel body, and one end of the third connecting rod away from the first connecting rod has a tendency to move away from the outer wall of the screening barrel body. A first hole groove is formed on the screening barrel body, a second hole groove is formed on the screening barrel body, and a third hole groove is formed on the screening barrel body.

5. The asphalt pavement screening method in the arid desert area according to claim 2, wherein A weakening groove adapted to the shape of the second rolling brush is formed on one side of the first outer shell close to the rotating block, and limiting grooves adapted to the shape of the first rolling brush are annularly and equidistantly formed on the inner wall of the screening barrel body.

6. The screening method for asphalt pavement in arid desert areas according to claim 1, wherein The screening mesh body is an arc-shaped structure protruding towards the bottom of the first frame body.

7. The asphalt pavement screening method in the arid desert area according to claim 2, wherein The baffle, the rotating block and the fourth connecting rod are integrally formed structures. The baffle, the rotating block and the fourth connecting rod are made of plastic materials. Lightweight grooves are formed at the top and bottom of the rotating block, and grooves are formed on both sides of the rotating block.

8. The asphalt pavement screening method in arid desert areas according to claim 2, wherein First skeletons are installed on both sides of the top of the first frame body. A second skeleton is fixedly connected to one side of the first skeleton close to the fourth connecting rod. The first skeleton and the second skeleton are both made of plastic materials. Side pieces are installed on the first skeleton and the second skeleton, and the side pieces are made of soft cloth materials.

9. The screening method for asphalt pavement in arid desert areas according to claim 8, characterized in that The second skeleton is an arc-shaped structure protruding in a direction away from the fourth connecting rod, and a weakening part is formed on the second skeleton.

10. The asphalt pavement screening method in arid desert areas according to claim 8, characterized in that, There are two first skeletons. The structure formed by the two first skeletons on the same side of the first frame body and one second skeleton is a triangle. One ends of the two first skeletons away from the second skeleton are rotatably connected together through a rotating shaft, and one ends of the two first skeletons close to the second skeleton are fixedly connected to the second skeleton.

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