A crushing, grading and screening device for construction waste

Abstract

The present application relates to the technical field of crushing devices, and specifically discloses a crushing, grading and screening device for construction waste, including a crushing box and a feeding barrel, and further comprising: the impact end of the power impact mechanism is located in the inner cavity of the crushing box; the screen plate mechanism is arranged on the discharge port at the bottom of the crushing box, and the screening size of the screen plate mechanism is non-fixed; the counter-attack liner is rotatably arranged in the inner cavity of the crushing box; the counter-attack liner is rotatably arranged in the inner cavity of the crushing box; the distance between the two ends of the counter-attack liner and the impact end of the power impact mechanism in the first state is equal, and the distance between the counter-attack liner and the impact end of the power impact mechanism in the second state gradually decreases from the feeding to the discharging direction; the one-way elastic damper is fixedly arranged in the inner cavity of the feeding barrel and connected to the back of the counter-attack liner, and the one-way elastic damper is used to apply thrust to the counter-attack liner to keep the counter-attack liner in the first state by default. The main purpose of the present invention is to improve crushing efficiency and fluency.

Description

Technical Field

[0001] The invention relates to the technical field of crushing devices, in particular to a crushing, grading and screening device for construction waste. Background Art

[0002] How to efficiently process and recycle construction waste has become a technical problem that needs to be solved urgently. In the existing technology, crushing devices are often used to crush construction waste. However, due to the different volumes, shapes and material hardness of construction waste, traditional equipment is prone to problems such as material jamming, increased wear and excessive motor load when facing large or hard materials, which often leads to frequent equipment shutdowns and maintenance. This makes the existing technology lack flexibility in processing construction waste and difficult to adapt to the characteristics of different materials, resulting in low processing efficiency and increased costs. Therefore, there is an urgent need for a new type of construction waste crushing, grading and screening device to improve crushing efficiency and smoothness. Summary of the Invention

[0003] The embodiment of the present application provides a crushing, grading and screening device for construction waste, the main purpose of which is to improve crushing efficiency and smoothness.

[0004] To achieve the above objectives, the present invention provides a device for crushing, grading and screening construction waste, including a crushing box and a feed barrel, and further comprising:

[0005] a power impact mechanism, wherein the impact end of the power impact mechanism is located in the inner cavity of the crushing box;

[0006] A sieve plate mechanism is arranged on the discharge port at the bottom end of the crushing box, and the screening size of the sieve plate mechanism is not fixed;

[0007] An impact liner is rotatably disposed in the inner cavity of the crushing box; in a first state, the distance between the two ends of the impact liner and the impact end of the power impact mechanism is equal; in a second state, the distance between the impact liner and the impact end of the power impact mechanism gradually decreases from the feeding direction to the discharging direction;

[0008] A one-way elastic damper is fixedly arranged in the inner cavity of the feed barrel and connected to the back of the impact liner. The one-way elastic damper is used to apply thrust to the impact liner to keep the impact liner in the first state by default.

[0009] In a feasible embodiment, the feed barrel includes a feed hopper installed at the upper end of the crushing box, and also includes: a snap-fit ​​plate fixedly snapped on the upper wall of the inner cavity of the feed hopper; a baffle movably connected in the inner cavity of the snap-fit ​​plate, and the bottom end of the baffle extends into the inner cavity of the feed hopper and does not contact the bottom wall of the inner cavity of the feed hopper; a gear shaft is rotatably arranged in the inner cavity of the snap-fit ​​plate and fixedly connected to the top of the baffle; two rack plates are both movable in a straight line direction and arranged in the inner cavity of the snap-fit ​​plate, and the two rack plates are meshed with the two gear parts in the gear shaft; a moving rod is fixedly connected to the outer side of the outer wall of the rack plate, and the moving rod can be movably arranged on the outer side of the outer wall of the crushing box; one end of the opening and closing assembly is connected to the moving rod, and the other end of the opening and closing assembly is connected to the impact liner, for driving the impact liner to switch from a first state to a second state.

[0010] In a feasible embodiment, the opening and closing assembly includes a shell that is snapped onto the outer wall of the upper half of the crushing box, and also includes: a rotating shaft that is rotatably arranged in the inner cavity of the shell; a push rod is sleeved on the outer wall of the rotating shaft; two connecting columns are respectively able to be movably clamped at both ends of the push rod, and the two connecting columns are respectively connected to the moving rod and the impact liner.

[0011] In a feasible embodiment, the power impact mechanism includes a drive motor fixed to the outside of the crushing box, and also includes: a crushing roller rotatably arranged in the middle of the inner cavity of the crushing box; one transmission end of the transmission assembly is connected to the output end of the drive motor, and the other end of the transmission assembly is connected to the crushing roller; a plurality of crushing protrusions are fixedly arranged in the crushing roller at equal distances along the circumferential direction.

[0012] In a feasible embodiment, a rotating seat is further provided in the inner cavity of the crushing box, the rotating seat is fixedly connected to the impact liner, and the rotation axis of the rotating seat is located lower than the bottom end of the impact liner.

[0013] In a feasible embodiment, the screen plate mechanism includes: an outer frame, which is arc-shaped as a whole and is fixedly arranged below the multiple crushing rollers; a plurality of first screen bars are arranged in the outer frame at equal intervals; an inner frame can move along the curved direction of the outer frame and be clamped below the outer frame; a plurality of second screen bars are arranged in the inner frame at equal intervals and can be fitted below the first screen bars; an adjustment plate is connected to the outer side of the lower end of the inner frame and extends toward the rotating seat.

[0014] In a feasible embodiment, the adjustment plate, the inner frame and the outer frame are concentrically arranged with each other, and a plurality of teeth are also provided on the outer wall of the adjustment plate; two gears are fixedly mounted on the rotating shaft in the rotating seat, and the gears can rotate synchronously with the impact liner, and the two gears are engaged with the teeth of the adjustment plate.

[0015] In a feasible embodiment, a replaceable steel plate is further provided on the outer wall of the baffle facing outward.

[0016] In a feasible embodiment, a return conveyor belt is further provided below the screen plate mechanism, and the output end of the return conveyor belt is located in the feed barrel.

[0017] The present application provides a crushing, grading and screening device for construction waste. The crushing, grading and screening device for construction waste provided in the present application effectively solves the problems of material jamming and excessive load existing in the prior art through a dynamic impact mechanism and a non-fixed impact liner; the dynamic adjustment mechanism of the impact liner enables the equipment to flexibly adjust the crushing space according to the size and hardness of the material, thereby improving the adaptability and processing efficiency of construction waste; and improving the reliability and smoothness of the overall operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a construction waste crushing, grading and screening device provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the internal structure of the feed barrel provided in an embodiment of the present application is shown;

[0020] Figure 3 The structure diagram of the counterattack liner provided in the embodiment of the present application is shown;

[0021] Figure 4 A schematic structural diagram of a rack plate provided in an embodiment of the present application is shown;

[0022] Figure 5 A schematic diagram of the structure of the crushing roller and crushing protrusion provided in an embodiment of the present application is shown;

[0023] Figure 6 Shown Figure 5 A local enlarged structural diagram in FIG.

[0024] Figure 7 A schematic structural diagram of a rotating seat provided in an embodiment of the present application is shown;

[0025] Figure 8 A schematic structural diagram of a one-way elastic damper provided in an embodiment of the present application is shown;

[0026] Figure 9 A schematic structural diagram of the sieve plate mechanism provided in an embodiment of the present application is shown;

[0027] Figure 10 A schematic diagram of the front perspective structure of the construction waste crushing, grading and screening device provided in an embodiment of the present application is shown.

[0028] In the figure: 10, crushing box, 20, feeding barrel, 30, power impact mechanism, 40, screen plate mechanism, 50, impact lining, 60, one-way elastic damper, 21, feeding hopper, 22, snap plate, 23, baffle, 24, gear shaft, 25, rack plate, 26, moving rod, 27, opening and closing assembly, 31, transmission assembly, 32, crushing roller, 33, crushing protrusion, 41, outer frame, 42, first screen bar, 43, inner frame, 44, second screen bar, 45, adjustment plate, 46, gear, 51, rotating seat, 271, rotating shaft, 272, push rod, 273, connecting column. DETAILED DESCRIPTION

[0029] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0030] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0031] Example 1

[0032] With the acceleration of urbanization, the amount of construction waste generated has increased year by year. How to efficiently treat and recycle construction waste has become a technical problem that needs to be solved urgently. In the existing technology, crushers are often used to crush and process construction waste. However, due to the different volumes, shapes and material hardness of construction waste, traditional equipment is prone to problems such as material jamming, increased wear and excessive motor load when facing large or hard materials, which often leads to frequent equipment shutdowns and maintenance. These limitations make the existing technology lack flexibility in treating construction waste and difficult to adapt to the characteristics of different materials, resulting in low processing efficiency and increased costs. Therefore, there is an urgent need for a new type of construction waste crushing, grading and screening device to improve crushing efficiency and reduce maintenance costs.

[0033] In view of this, an embodiment of the present application provides a crushing, grading and screening device for construction waste, the main purpose of which is to improve crushing efficiency and reduce maintenance costs.

[0034] like Figures 1 to 10 As shown, an embodiment of the present application provides a crushing, grading and screening device for construction waste, comprising a crushing box 10 and a feed barrel 20, and also comprising: a power impact mechanism 30, a screen plate mechanism 40, an impact liner 50 and a one-way elastic damper 60; the impact end of the power impact mechanism 30 is located in the inner cavity of the crushing box 10; the screen plate mechanism 40 is arranged on the discharge port at the bottom end of the crushing box 10, and the screening size of the screen plate mechanism 40 is non-fixed; the impact liner 50 can be rotatably arranged in the inner cavity of the crushing box 10; the distance between the two ends of the impact liner 50 and the impact end of the power impact mechanism 30 is equal in the first state, and the distance between the impact liner 50 and the impact end of the power impact mechanism 30 in the second state gradually decreases from the feeding to the discharging direction; the one-way elastic damper 60 is fixedly arranged in the inner cavity of the feed barrel 20 and connected to the back of the impact liner 50, and the one-way elastic damper 60 is used to apply thrust to the impact liner 50 to keep the impact liner 50 in the first state by default.

[0035] The equipment provided in this application is improved based on the crusher in the prior art. In the prior art, most of the crushing of construction waste is carried out by this equipment. However, the size, shape and hardness of the construction waste are irregular. When a large volume of material is put into the crusher, it causes material jamming at the feed port. When an instantaneous large impact force acts on the large volume of material or hard material, in addition to the jamming, there may also be aggravated wear of the impact liner 50 or the side wall of the equipment and excessive motor load. In common cases, the machine needs to be shut down for processing. Therefore, the crusher in the prior art has certain difficulties in breaking the difficult-to-crush material into fine particles at one time, or has certain conditions for the material put in.

[0036] The present construction waste crushing, grading and screening device, wherein the crushing box 10 is a hollow structure, and its inner cavity serves as the main material crushing place, wherein the crushing box 10 can be set to a two-section type, such as an upper section and a lower section, wherein the upper section can be disassembled from the lower section, thereby facilitating the maintenance of the equipment, and the feed barrel 20 is connected to the upper section structure in the crushing box 10 in an inclined state, and the function of the feed barrel 20 is to feed the construction waste materials to be crushed into the crushing place through it, thereby completing the necessary steps of the crushing process, and secondly, the main crushing action execution structure of the present device is a power impact mechanism 30, wherein the power impact mechanism 30 includes a power part and an impact end, and the impact end impacts the material entering the crushing box 10 through the feed barrel 20 through a continuous rotation action, thereby impacting the construction waste from large pieces into small pieces, thereby achieving the purpose of crushing, and in order to further cooperate with the impact process, so that the material can be repeatedly and effectively impacted by the impact end, so at the impact end An impact liner 50 is also provided next to it. The impact liner 50 can adopt the same structure as the impact liner 50 in the prior art and has an arc shape. It should be noted that the impact liner 50 provided in the present application is not fixed. In the default state, the distance between any position of the impact liner 50 and the impact end is the same. However, when large pieces of construction waste enter the device, if the large pieces of construction waste quickly enter the crushing box 10, material jamming or excessive load may occur. Therefore, in order to ensure that the equipment can operate stably and for a long time, the distance between the end close to the feed port and the impact end of the impact liner 50 provided in the present application can be adjusted. For example, the distance is increased so that the construction waste entering the equipment has sufficient crushing space and passing space during the impact process, which can effectively avoid the situation where the material is stuck, thereby realizing a dynamic and flexible control mechanism, which can easily cope with more complex construction waste conditions, has lower requirements for the materials being processed, and has a wider range of practical applications.

[0037] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 10As shown, in some examples, further, the feed cylinder 20 includes a feed hopper 21 installed at the upper end of the crushing box 10, and also includes: a snap plate 22, a baffle 23, a gear shaft 24, two rack plates 25, a moving rod 26 and a tensioning assembly 27, the snap plate 22 is fixedly snapped on the upper wall of the inner cavity of the feed hopper 21; the baffle 23 is movably connected in the inner cavity of the snap plate 22, and the bottom end of the baffle 23 extends into the inner cavity of the feed hopper 21 and does not contact the bottom wall of the inner cavity of the feed hopper 21; the gear shaft 24 is rotatably set in the inner cavity of the snap plate 22 and is fixedly connected to the top of the baffle 23; the two rack plates 25 are both movable in a straight line direction and are arranged in the inner cavity of the snap-fit ​​plate 22, and the two rack plates 25 are partially meshed and connected with the two gears 46 in the gear shaft 24; the moving rod 26 is fixedly connected to the outer side of the outer wall of the rack plate 25, and the moving rod 26 can be movably arranged on the outer side of the outer wall of the crushing box 10; one end of the opening and closing component 27 is connected to the moving rod 26, and the other end of the opening and closing component 27 is connected to the impact liner 50, for driving the impact liner 50 to switch from the first state to the second state.

[0038] In this example, the feed barrel 20 includes a feed hopper 21 as the main structure. The purpose of the feed barrel 20 is to efficiently introduce unprocessed materials. At the same time, it can also obtain the height of the material in a simple physical way and roughly know the volume of the processed material. Specifically, the feed barrel 20 also includes a snap-fit ​​plate 22. The snap-fit ​​plate 22 is located on the upper wall of the feed hopper 21. The lower half of the baffle 23 extends into the inner cavity of the feed hopper 21 to sense larger materials. On the one hand, when larger construction waste enters the inner cavity of the feed hopper 21, it will contact the baffle 23. After the baffle 23 is subjected to force, it will perform a corresponding mechanical transmission action to transmit this power to the impact liner 50, and finally drive the impact liner 50 to switch from the first state to the second state, thereby flexibly responding to this large volume of material.

[0039] The gear shaft 24 is fixed to the top of the baffle 23. When the baffle 23 is subjected to force, the baffle 23 rotates, thereby the gear shaft 24 rotates synchronously. Since two rack plates 25 are meshed on the outer wall of the gear shaft 24, the rotation of the gear shaft 24 will also drive the two rack plates 25 to move linearly, thereby driving the movable rod 26 fixedly connected to both sides of the two rack plates 25 to move synchronously. The opening and closing assembly 27 connects the impact liner 50 and the movable rod 26, and can switch the impact liner 50 between the first and second states by driving the movement of the movable rod 26 to adapt to different sizes of construction waste. When large pieces of material enter the feed hopper 21, the opening and closing action of the baffle 23 can be dynamically adjusted to ensure sufficient crushing space and avoid material jamming, thereby improving the overall operation efficiency and stability of the equipment. The present structure effectively solves the problems of excessive load and wear caused by poor feeding in the prior art, expands the adaptability of the equipment to complex construction waste conditions, and improves the practicality and reliability of the equipment.

[0040] In the second aspect of this example, since the feed port is open and the internal impact end is continuously running, this will cause the material to jump out of the feed barrel 20. Therefore, the baffle 23 is provided to provide safety for the device in the second aspect.

[0041] like Figure 5 、 Figure 6 and Figure 10 As shown, in some examples, further, the opening and closing assembly 27 includes a shell that is snapped onto the outer wall of the upper half of the crushing box 10, and also includes: a rotating shaft 271, a push rod 272 and two connecting columns 273, the rotating shaft 271 is rotatably arranged in the inner cavity of the shell; the push rod 272 is sleeved on the outer wall of the rotating shaft 271; the two connecting columns 273 can be movably clamped at both ends of the push rod 272, and the two connecting columns 273 are respectively connected to the moving rod 26 and the impact liner 50.

[0042] In this example, the opening and closing assembly 27 realizes dynamic adjustment and control of the impact liner 50 through the shell, the rotating shaft 271, the push rod 272 and the two connecting columns 273. Specifically, the shell is fixed to the outer wall of the upper half of the crushing box 10, providing support and protection for the internal mechanism; the rotating shaft 271 is freely rotatable in the middle position of the inner cavity of the shell, and is perpendicular to the outer wall of the crushing box 10, serving as the rotation center of the push rod 272; the push rod 272 is sleeved on the outer wall of the rotating shaft 271, and the rotation of the rotating shaft 271 drives the two ends of the push rod 272 to move back and forth; the two connecting columns 273 are respectively connected to the two ends of the push rod 272, and are connected to the moving rod 26 and The impact liner 50 is connected, so that when a large volume of building materials enters the baffle 23, the moving rod 26 moves in a straight line direction and pulls the bottom end of the push rod 272. At the same time, the push rod 272 rotates along the rotating shaft 271, and the top of the connecting column 273 will push the top of the impact liner 50 through the connecting column 273, so that the impact liner 50 switches from the first state to the second state to deal with the large volume of building materials entering the crushing box 10. Therefore, the action process provided in this example allows the impact liner 50 to be flexibly adjusted when facing construction waste of different sizes and shapes, providing a larger crushing space to prevent material jamming or equipment overload.

[0043] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 10 As shown, in some examples, further, the power impact mechanism 30 includes a driving motor fixed to the outside of the crushing box 10, and also includes: a transmission component 31, a crushing roller 32 and a plurality of crushing protrusions 33 that are rotatably arranged in the middle of the inner cavity of the crushing box 10; one of the transmission ends of the transmission component 31 is connected to the output end of the driving motor, and the other end of the transmission component 31 is connected to the crushing roller 32; and a plurality of crushing protrusions 33 are fixedly arranged in the crushing roller 32 at equal intervals along the circumferential direction.

[0044] In this example, the power impact mechanism 30 is used to achieve an efficient material crushing effect; as the power system in this device, it mainly includes a drive motor, which is fixed to the outside of the crushing box 10; the transmission component 31 transmits the output power of the motor to the crushing roller 32, ensuring that the crushing roller 32 can continuously rotate in the middle of the inner cavity of the crushing box 10 to apply impact force; multiple crushing protrusions 33 evenly distributed on the crushing roller 32 are arranged at equal intervals in the circumferential direction to enhance the crushing effect of the crushing roller on garbage; when the drive motor is started, the transmission component 31 transmits the rotational power to the crushing roller 32, causing the crushing protrusions 33 to rotate at high speed and continuously impact the construction waste entering the crushing box 10; Figure 1As shown, the transmission component 31 can adopt a pulley and belt transmission method, so the continuous rotation and impact action effectively crushes large pieces of material into small pieces, thereby improving the crushing efficiency of construction waste.

[0045] like Figures 7 to 10 As shown, in some examples, further, a rotating seat 51 is provided in the inner cavity of the crushing box 10 , and the rotating seat 51 is fixedly connected to the impact liner 50 , and the rotation axis position of the rotating seat 51 is lower than the bottom end of the impact liner 50 .

[0046] It is understood that the purpose of adjusting the impact plate 50 in this device is to expand the material processing space within the crushing chamber 10. When the rotating end of the impact plate 50 is within the range of the impact plate 50, the top end of the impact plate 50 moves outward, but the bottom end of the impact plate 50 is closer to the impact end of the dynamic impact mechanism 30, which in turn reduces the processing space. To comprehensively expand the material processing space and further improve the smoothness of material processing, in this example, the rotating base 51 is positioned significantly lower than the impact plate 50. Thus, only after the impact plate 50 is pushed by the tensioning assembly 27 can it move outward as a whole. After movement, the upper half of the impact plate 50 has a larger movement span, while the lower half has a smaller span than the upper half, forming a processing channel that gradually narrows from top to bottom, ensuring the final particle size of the processed material and the smoothness of the crushing process.

[0047] like Figures 7 to 10 As shown, in some examples, further, the screen plate mechanism 40 includes: an outer frame 41, a plurality of first screen bars 42, an inner frame 43, a plurality of second screen bars 44 and an adjustment plate 45; the outer frame 41 is arc-shaped as a whole, and the outer frame 41 is fixedly arranged below the plurality of crushing protrusions 33; the plurality of first screen bars 42 are arranged in the outer frame 41 at equal intervals; the inner frame 43 can move along the curved direction of the outer frame 41 and be clamped at the bottom of the outer frame 41; the plurality of second screen bars 44 are arranged in the inner frame 43 at equal intervals and can be fitted under the first screen bars 42; the adjustment plate 45 is connected to the outer side of the lower end of the inner frame 43 and extends toward the rotating seat 51.

[0048] In this example, the screen plate mechanism 40 constructs an adjustable screening mechanism to cope with processing objects of different volumes. Simply put, when the processed material is of regular size, the impact liner 50 is in the first state and can easily process these materials. If the processed material is a large piece of construction waste, the impact liner 50 adaptively and dynamically adjusts its position to the second state. At this time, the material processing space will be adjusted to become larger, that is, in order to avoid jamming or other unexpected situations, the smoothness of material processing is guaranteed, but the material processing standards may be sacrificed. After processing, large pieces of construction materials may have a particle size slightly larger than that of conventional materials. In this case, the dynamic screening mechanism used will release these particles slightly larger than conventional materials to the outside of the equipment, further avoiding jams caused by material accumulation. The materials screened out of the equipment are ready to be processed again by the equipment to finally reach the target particle size.

[0049] During the specific implementation process, multiple first screen bars 42 are evenly arranged in the outer frame 41 to form an upper screening structure. The inner frame 43 and the second screen bars 44 arranged in the inner frame 43 can move along the curve direction of the outer frame 41. When the first screen bars 42 and the second screen bars 44 are staggered, the volume of particles that can pass through is smaller. When the position of the inner frame 43 is moved, the second screen bars 44 are located below the first screen bars 42, and the positions of the two overlap. At this time, the gap in the sieve body that can leak out is the largest, and a larger volume of construction particles can pass through, thereby dealing with the debris of large pieces of construction waste that were not completely crushed at one time, and they can be slowly put into the equipment again for secondary treatment.

[0050] like Figure 9 and Figure 10 As shown, in some examples, further, the adjustment plate 45, the inner frame 43 and the outer frame 41 are concentrically arranged with each other, and a plurality of teeth are also provided on the outer wall of the adjustment plate 45; the two gears 46 are fixedly mounted on the rotating shaft in the rotating seat 51, and the gears 46 can rotate synchronously with the impact liner 50, and the two gears 46 are engaged with the teeth of the adjustment plate 45.

[0051] Based on the previous example, this example provides a dynamic response mechanism that can automatically adjust the screen gap following the impact liner 50, thereby eliminating the need for manual or active adjustment. The entire equipment has an adaptive active adjustment response function after large-volume construction waste is input, crushed, and discharged. Specifically, the outer wall of the adjustment plate 45 is provided with a plurality of teeth, which are engaged with two gears 46 on the rotating shaft fixed in the rotating seat 51; as the impact liner 50 rotates, the two gears 46 will also rotate synchronously, driving the movement of the teeth and the adjustment plate 45, thereby changing the positional relationship between the first screen bar 42 and the second screen bar 44; and then changing the screening gap.

[0052] In some examples, further, the damping direction of the one-way elastic damper 60 is during the process of the impact lining 50 recovering from the second state to the first state; the elastic application direction of the one-way elastic damper 60 is during the process of the impact lining 50 recovering from the second state to the first state.

[0053] In this example, the one-way elastic damper 60 is provided to ensure that when a large piece of construction waste enters the baffle 23, the impact liner 50 is eventually pushed to the second state through the above-mentioned mechanical action. However, the large piece of construction waste is about to break away from the baffle 23 and enter the crushing box 10. In order to prevent the impact liner 50 from resetting after the large piece of construction waste breaks away from the baffle 23 and before being crushed, the one-way elastic damper 60 is used to slow down the resetting speed of the impact liner 50. As a result, during the crushing process of the large piece of construction waste, the impact liner 50 is also in a position other than the first state. After the large piece of construction waste has been processed, when the small piece of construction waste continues to be processed, the impact liner 50 can automatically return to the first state from the second state. The impact liner 50 is slowly reset by the elastic force of the damper, relying on the direction of elastic application. Since this structure is a mature technology in the prior art, it will not be described in detail in this example.

[0054] In some examples, further, a replaceable steel plate is provided on the outer wall of the outward side of the baffle 23 .

[0055] It can be understood that the outer wall of the baffle 23 is provided with a replaceable steel plate, so that the baffle 23 can withstand the impact and wear from construction waste; the replaceable design allows the operator to quickly replace it without replacing the entire baffle 23 if the steel plate is severely damaged after a period of use, thereby simplifying the maintenance process and reducing maintenance costs.

[0056] In some examples, further, a return conveyor belt (not shown) is provided below the screen plate mechanism 40 , and the output end of the return conveyor belt is located in the feed barrel 20 .

[0057] It is also understood that the return conveyor, located below the screen mechanism 40, has its output end located within the feed drum 20, forming a closed-loop material processing system. When incompletely crushed portions of the screened construction waste pass through the screen and fall onto the return conveyor, they are transported back to the feed drum 20 and fed back into the crushing box 10 for multi-stage processing, ensuring the equipment's crushing quality.

[0058] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or electronic device that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or electronic device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, commodity, or electronic device that includes the element.

[0059] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable computer-readable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0060] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A crushing, grading and screening device for construction waste, comprising a crushing box (10) and a feeding cylinder (20), characterized in that: Also includes: A power impact mechanism (30), wherein an impact end of the power impact mechanism (30) is located in the inner cavity of the crushing box (10); A sieve plate mechanism (40) is arranged on a discharge port at the bottom end of the crushing box (10), and the screening size of the sieve plate mechanism (40) is not fixed; An impact liner (50) is rotatably disposed in the inner cavity of the crushing box (10); in a first state, the distances between the two ends of the impact liner (50) and the impact end of the power impact mechanism (30) are equal, and in a second state, the distance between the impact liner (50) and the impact end of the power impact mechanism (30) gradually decreases from the feeding direction to the discharging direction; a one-way elastic damper (60) fixedly arranged in the inner cavity of the feed barrel (20) and connected to the back of the impact lining plate (50), the one-way elastic damper (60) being used to apply a thrust to the impact lining plate (50) so as to keep the impact lining plate (50) in the first state by default; The feeding cylinder (20) comprises: A feed hopper (21) mounted on the upper end of the crushing box (10); A buckling plate (22) fixedly buckled onto the upper wall of the inner cavity of the feed hopper (21); A baffle (23) movably connected in the inner cavity of the buckle plate (22), wherein the bottom end of the baffle (23) extends into the inner cavity of the feed hopper (21) and does not contact the bottom wall of the inner cavity of the feed hopper (21); A gear shaft (24) rotatably disposed in the inner cavity of the buckling plate (22) and fixedly connected to the top end of the baffle plate (23); Two rack plates (25) are disposed in the inner cavity of the locking plate (22) and are both capable of moving in a linear direction. The two rack plates (25) are partially meshed and connected with two gears (46) in the gear shaft (24); A moving rod (26) fixedly connected to the outer side of the outer wall of the rack plate (25), the moving rod (26) being movably arranged on the outer side of the outer wall of the crushing box (10); An opening and closing component (27), one end of the opening and closing component (27) is connected to the moving rod (26), and the other end of the opening and closing component (27) is connected to the impact liner (50), and is used to drive the impact liner (50) to switch from a first state to a second state.

2. The construction waste crushing, grading and screening device according to claim 1 is characterized in that: The opening and closing assembly (27) comprises a shell that is buckled onto the outer wall of the upper half of the crushing box (10), and further comprises: A rotating shaft (271) rotatably disposed in the inner cavity of the shell; A push rod (272) sleeved on the outer wall of the rotating shaft (271); Two connecting columns (273) are respectively movably clamped on the two ends of the push rod (272), and the two connecting columns (273) are respectively connected to the moving rod (26) and the counterattack liner (50).

3. The construction waste crushing, grading and screening device according to claim 1 is characterized in that: The power impact mechanism (30) comprises a drive motor fixed outside the crushing box (10), and further comprises: A crushing roller (32) rotatably disposed in the middle of the inner cavity of the crushing box (10); A transmission assembly (31), one end of the transmission assembly (31) being connected to the output end of the drive motor, and the other end of the transmission assembly (31) being connected to the crushing roller (32); A plurality of crushing cams (33) are fixedly arranged in the crushing roller (32) at equal intervals along the circumferential direction.

4. The construction waste crushing, grading and screening device according to claim 3 is characterized in that: A rotating seat (51) is also provided in the inner cavity of the crushing box (10), the rotating seat (51) being fixedly connected to the impact lining plate (50), and the position of the rotating axis of the rotating seat (51) being lower than the bottom end of the impact lining plate (50).

5. The construction waste crushing, grading and screening device according to claim 4 is characterized in that: The sieve plate mechanism (40) comprises: An outer frame (41) is arc-shaped as a whole, and the outer frame (41) is fixedly arranged below the crushing roller (32); A plurality of first screen bars (42) are arranged in sequence and at equal intervals within the outer frame (41); An inner frame (43) capable of moving along the curved direction of the outer frame (41) and being clamped below the outer frame (41); A plurality of second screen bars (44) are arranged in sequence and at equal intervals in the inner frame (43) and are capable of being fitted below the first screen bars (42); The adjustment plate (45) is connected to the outer side of the lower end of the inner frame (43) and extends toward the rotating seat (51).

6. The construction waste crushing, grading and screening device according to claim 5, characterized in that: The adjustment plate (45), the inner frame (43) and the outer frame (41) are arranged concentrically with each other, and a plurality of teeth are arranged on the outer wall of the adjustment plate (45); The two gears (46) are both fixedly mounted on a rotating shaft in the rotating seat (51); the gears (46) can rotate synchronously with the impact lining plate (50); and the two gears (46) are both meshed with teeth of the adjustment plate (45).

7. The device for crushing, grading and screening construction waste according to claim 5, characterized in that: A replaceable steel plate is also provided on an outer wall of the baffle (23) facing outward.

8. The device for crushing, grading and screening construction waste according to claim 5, characterized in that: A return conveyor belt is also provided below the sieve plate mechanism (40), and the output end of the return conveyor belt is located inside the feed barrel (20).

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